Jared Loughner

Jared Loughner. On January 8, 2011 U. S. Representative Gabrielle Giffords was shot along with eighteen other people at a public meeting in a grocery store parking lot near Tucson Arizona. Six of the eighteen people shot that day died. This included Arizona District Court Chief Judge John Roll and nine-year-old Christina-Taylor Green. Gifford was Holding a meeting called â€Å"Congress on Your Corner† in a Safeway store when she was shot through the head at point blank range. 22-year old Jared Loughner, a tucson man, was arrested at the scene.Federal prosecutors filed five charges against him, including the attempted assassination of a member of Congress and the assassination of a federal judge. Even though Loughner had a history of drug possession charges and had been suspended by his college for disruptive behavior, the motive for the shooting remains unclear. Invoking his right to remain silent , Loughner did not cooperate with authorities. Jared was found to be Incompetent to stand trial based on medical evaluations by a judge. As a young man in high school Loughner seemed ordinary enough.Occasionally he seemed withdrawn, as a normal teen would be, and a bit nerdy. Loughner loved music and played the saxophone well. Sometime around after Loughner dropped out of Mountain View High School, he didn't seem the same. He began drinking and using drugs including pot and hallucinogens like acid. Neighbors said that Loughner was not hostile toward anyone but he certainly did not warm up to anyone either. He didn't care what others thought of him. He had his own opinions and out looks on things and wasn't afraid to share them.Loughner's friends started noticed a change happening. Loughner started to do strange things. For example he spent months working out so that he could join the army. Then after traveling to the military processing station he told an Army official that he smoked marijuana excessively. Later Loughner passed a drug test, which meant he had n ot been smoking for at least a couple of weeks. After the Army incident Loughner's behavior became more erratic. He started having run-ins with Police for drug possession and alcohol and vandalizing street signs.Loughner started to think that the Government was trying to control him and everyone else in the US. He lost his job at quiznos and an animal shelter because he refused to follow instructions. When classes at Pima Community College began, fellow students were frightened by Loughner's behavior. â€Å"He had this hysterical kind of laugh, laughing to himself,† says Benjamin McGahee, his math professor. McGahee says that Loughner would say nonsensical things about â€Å"denying math. † One student in the back of McGahee's classroom said she was scared for her life, literally.By now Loughner was clearly developing a mental illness. Many signs suggest he had delusional disorder or schizophrenia. The average age of onset for both illnesses is roughly 20, about when L oughner started showing these symptoms. Loughner Became obsessed with lucid dreaming. Lucid dreaming is a dream state you can enter when you're half asleep where you are aware that you're dreaming. Loughner used drugs to keep him from falling into deep sleep which then encourage lucid dreaming.Last year the European Science Foundation reported that lucid dreaming creates distinct patterns of electrical activity in the brain that have similarities to the patterns made by psychotic conditions. Paranoid delusions can happen when lucid dermas are played over and over again when the person awakes. According to his friend Bryce Tierney, Loughner was replaying his lucid dreams in a dream journal. Loughner is being treated at a Missouri prison facility here he has been forcible medicated for about seven months in a bid to try to make him mentally fit to stand trial.Loughner has pleaded not guilty to 49 charges from the Shooting in Tucson. Loughner has not been able to stand trill because U. S. District Judge Larry Burns has ruled that he is not mentally fit to stand trial since experts have concluded that Loughner suffers from schizophrenia. JUdge Burns says that Loughner will eventually be ready for trial after he receives more treatment . Loughner's current stay is set to the end June 7th. Even though it is said that Loughner's condition is improving, His lawyers ave been fighting the governments efforts to forcible medicate him. Over the summer of 2011 the appeals court temporarily stopped Loughners forced medication, but it resumed when mental health experts concluded that Loughner's condition was worsening with out the medication. Since his arrest Loughner has shown bizarre behavior. He was forcibly removed from a May 25 Court hearing when Loughner lowered his head inches from the court room table then lifted his head and began a loud, angry rant.But since he has been forcibly medicated his mental condition has improved. Loughner has sat still and expressionless for seven hours in a hearing in September . But the problem is weather a mentally ill person who is considered very dangerous should be medicated. Prosecutes say the decisions is for officials to make but Loughner's lawyers say its up to the judge. So far prison officials have decided to medicate Loughner. His lawyers say that forcibly medication Loughner is violating his due-process rights.

An Acting Critique of Legally Blonde the Musical Essay

An Acting Critique of Legally Blonde the Musical On Friday night, May 3rd at & p.m., my mother and I attended the opening night of Legally Blonde in the Buena P.A.C. I must begin by saying that I am slightly biased towards one of the actors who just so happens to be my sister, so the roles of Chutney, the girl who accidentally murdered her father, and a Delta Nu sister have never been played more perfectly in my eyes. While I found the play both amusing and enjoyable, there were some big issues as far as opening night goes. Things like lack of projection (on top of some serious microphone issues, which I cannot blame the actors for), actors forgetting lines, and sloppy blocking, especially in many of the dances during the musical numbers, all took away from the overall experience of the show. However, there were definitely some things I absolutely loved, which were mostly specific characters. Also, the quality of the singing in all the musical numbers was very high, which is something you don’t see often in a high school mus ical production. That being said, I thought it was worth my five dollars, and a great way for Buena to end its 2012-13 season. Like I said before, technical aspects such as microphone malfunctions cannot be blamed on the actors. It is the job of the technicians to ensure all of the equipment functions properly. However, I believe that actors should not rely on such technical aspects alone to ensure that they are effectively heard by every member of the audience. Call me old fashioned, but I am a firm believer in projection; making your voice bounce off the walls of the theater. After all, theaters are geometrically designed to do just that. But I guess not everyone feels that way, and it was apparent Friday night when every time an actor’s microphone went out, it was as if they were whispering. This is often detrimental to the plot because if actors cannot be heard, vital pieces of information are lost upon the audience. This issue could have been non-existent if the actors had practiced their projection. Luckily, I saw the movie first, so I knew the plot before I even watched the play. Along with not always being able to hear the actors, line memorization seemed to cause a few problems on stage Friday night as well. I will admit, it was not as apparent of a problem as was the lack of audibility at times, but I did notice it quite a few times. The example that stood out to me most was the character of Paulette, the owner of Elle’s favorite salon and close friend to Elle. She was in the middle of a solo on stage and completely dropped almost an entire verse of her song. I will not judge her too harshly because I fully understand the pressures of opening night, and I am sure the pressure of a solo is equally as heavy. I am simply using it as an example. Any other line slips I noticed were fairly minor, and when they happened, the actors did a pretty good job of covering it up and going with the flow. The last big problem I had with Legally Blonde the Musical was the blocking. Call me crazy, but it seemed to me towards the end of the play that either the actors got extremely lazy with their blocking during the dances, or they simply did not rehearse the scenes enough. Either way, it was very obvious. Actors were off tempo, bumping into one another, and were also completely out of sync when they should not have been. The actors most guilty of that were the Delta Nu sorority sisters (except my sister, of course). I also noticed that it was not only the dance scenes that lacked blocking, but so did many of the conversational scenes. I love watching actors’ faces more than anything because I believe that’s where most acting is done. I wanted so badly to do that Friday night, but I spent the whole time craning my neck to try and get glimpses. Quite irritating, considering the fact that my mother and I showed up almost a half hour early to get seats in the center of the ho use. Acting is all about action, and action cannot be understood if it cannot be seen. Now that I have ranted and raved about what I really did not enjoy about the Friday night showing of Legally Blonde the Musical, I should probably talk about the things that I really enjoyed, which definitely outweighed the bad. My absolute favorite character (besides the ones played by my sister) was Enid Hoopes, played by senior Aubrie Bouchard. She was a women’s rights activist, as well as a full-blooded lesbian, your average tough girl with a lot to prove to the world. She was absolutely hilarious; her timing was great, her character development was awesome, and her projection was wonderful. She had me rolling with all of her perfectly timed quips, especially when her inner lesbian showed. My other favorite group of  characters was Elle’s three best friends from Malibu: Pilar, Margot, and Serena, who also came to be known as the Greek chorus. This was an extremely appropriate nickname because they served the same purpose as the original Greek choruses in the first plays. They always showed up in Elle’s times of need to provide her with support, and to provide the audience with information. They also happened to be hilarious and bubbly, as Delta Nu sisters should be. They also had wonderful projection, especially Serena, played by Jansen Morgen. I also enjoyed Professor Callahan’s character, played by Braxton Olgetree. He was not a very likable character as far as the plot of the play went, but I could tell the actor put a lot of work into his character, especially on the voice. He was drab and monotone, just like a law professor at Harvard should be, and his character work really shone through. I also must mention the most adorable and well-behav ed character of the entire show, the part of Rufus, Paulette’s dog, played by an American bulldog named Sarge. He was both cute and flawless. The other thing I loved about this play was the overall quality of the singing. I was very pleased with all the musical numbers; all the songs were cute and catchy, no one made my ears bleed, and I could hear everyone fairly well even with all of the microphone issues. Usually, from my personal experience, most high school musicals consist of two groups of people: choir kids and theater kids. Not all choir kids can act, and not all theater kids can sing, but I am pleased to say that this musical was not that way. Everyone was able to sing and act quite effectively. My favorite musical number was the song â€Å"Gay or European†, which was performed in the courtroom scene when they were trying to figure out whether or not the pool boy, who claimed to be Brooke Windam’s lover, was gay. It was very light-humored and entertaining. I also enjoyed the opening number, â€Å"Ohmigod†, which was performed by Elle and her Delta Nu sisters in the very beginning. Like I said from the start, I was a little biased towards this play from the beginning simply because my little sister was in it. However, even when I put my bias aside, I can honestly say I was thoroughly pleased with my experience as an audience member as a whole. While I must admit there were various issues with things like actor projection, lack of proper blocking,  and lack of line memorization, the overall quality of acting was quite enjoyable. The character work done by most of the actors was very apparent and applaudable. I loved all of the main characters, as well as the minor ones. The singing was also fantastic; I did not find myself cringing at any of the musical numbers. Instead, I actually found myself tapping my feet and sometimes even singing along with the catchy songs. I know the showings of Legally Blonde the Musical are all over now, but I would recommend it to anyone to go and see that show. It was definitely an â€Å"A† performance.

Analyze the handover between two WLAN, two Wimax and two UMTS networks

Analyze the handover between two WLAN, two Wimax and two UMTS networks ABSTRACT In recent years, telecommunication has flourished extensively so much that several areas of studies coexist now thanks to multiple technologies. One of them is heterogeneous handover which is a concept that aims to provide continuity of connection while crossing different networks. In this thesis, our main objective is to analyze the handover between two WLAN, two Wimax and two UMTS networks. The vertical handover decision is taken on the basis of various algorithms such as variance-based algorithm, taguchi algorithm, which calculates the variance of parameters such as delay, jitter, bandwidth and packet loss for the above networks, and selection of the network having most parameters with minimum score. These algorithms are calculated and the decision factors for each wireless network are compared, in order to detect and trigger a vertical handover. The factors can be classified as beneficial, i.e., the larger, the better, or on the basis of cost, i.e., the lower, the better. This algorithm is also compared with other algorithms such as MEW (Multiplicative experiment weighting), SAW (Simple Additive Weighting), TOPOSIS (Technique for order preference by similarity to ideal solution) and GRA (Grey Relational Analysis). These algorithms are appropriate for different traffic classes. Simulation results for the proposed algorithm in Matlab is discussed and compared with other multiple attribute decision making algorithms on the basis of bandwidth, jitter, delay etc. It can be seen that the proposed algorithm causes the minimum packet delay than others. Jitter is also comparatively less than other algorithms. Besides, it provides the highest bandwidth than any other MADM algorithm. Keywords:-UMTS, SAW, MEW, GRA, TOPSIS, WLAN and Wimax Chapter-1 Introduction 1.1 History of mobile services ‘ The journey of mobile telephony began with the 1st generation services. The design for it was developed by AMPS (Advanced mobile phone system) in 1970 and it is based on analog cellular technology. The data bandwidth provided by the system was just 1.9 kbps and it used TDMA multiplexing. Then, the 2nd generation of mobile services was introduced in 1981.The 2G systems are still largely used for voice calls. The data bandwidth provided was 14.4 kbps [1] and the technology used was TDMA and CDMA. It is based on digital technology and also provided short messaging services or SMS along with voice communication. Similarly, it provided circuit switched data communication services at low speed. In 1999, the technology switched to 2.5 G, which used GPRS, EDGE as the standards. It provided higher throughput for data service up to 384 kbps. Later, in 2002, the 3G services were introduced, providing high quality audio, video and data services. Which also provided broadband data capabilities up to 2 Mbps. It mainly uses packet switched technology which utilizes the bandwidth more efficiently. In 2010, when 4th generation of cellular technology was introduced, it was expected to complement and replace the 3G networks. The key features of 4G mobile networks is that it can deliver information anywhere and anytime using seamless connection.4G network is an IP based network which gives access through collection of various radio interfaces. Its network provides access to best possible service with seamless handoff, combining multiple radio interfaces into a single network for subscriber to use. Thus, users have different services with an increased coverage. It does not matter whether there is failure or loss of one or more networks, the 4G technology keeps all the networks integrated into IP based system, which require vertical handoff for seamless connection between the networks. As the number of users are responsible for enhancing the qu ality of 4G service, the very process becomes an indispensable component. While the 4G technology has its genesis in the idea of invasive computing, software defined radio is the prominent adhesive behind the entire process. Here the software defined radio is programmable and able to transmit and receive a wide range of frequencies while emulating any transmission format. It should offer high speed of 100 Mbits for stationary mobile and 20 Mbits while travelling having network capacity 10 times faster than 3G networks. This increases the download speed to 1 second for 1Mbyte of file compared to 200 seconds in 3G networks. Which should support fast speed volume data transmission at lower cost. The obviously it should provide seamless connection between multiple wireless networks and mobile networks. For this, the support of vertical handoff is essential. Apart from it, it is expected that seamless multimedia services are provided it being an IP-based system, which also replaces SS7 (signaling system 7) that consumes considerable amount of bandwidth. Due to IP-based network, optimum usage of bandwidth is expected. 1.2 Motivation ‘ There are several communication systems such as the Ethernet, Wireless LAN, GPRS and 3G coexisting with their own different characteristics such as bandwidth, delay and cost. Wireless mobile users require high quality of service (QoS) and one of the factors directly affecting QoS is the number of call drops. Therefore, it has to be reduced or eliminated, possibly, to achieve high QoS. The number of call drops experienced by a system mainly depends on its channel assignment and handoff schemes. Since majority of WLANs are deployed in the areas like hotels, cafes, airports, offices, etc, the speed of the users are generally normalized within the WLAN coverage area. In WLAN/Cellular network interworking, a user can either have access from micro layer or from macro layer of cellular network depending whether he wants slow or fast speed. Basically, in cellular networks, user speed is the primary factor to determine whether a user is fast or slow and that information is subsequently used to handle vertical handoff. Since the speed information about the users are not directly available when they are in WLAN coverage area ,the vertical handoff schemes employed in cellular networks are not directly suitable for solving vertical handoff problem in Cellular/WLAN interworking. This raises to many important questions. Assume that the speed of each user in a WLAN coverage area is within small threshold value. Normally, when a user is outside WLAN coverage area, the type of user whether fast or slow, is determined on the basis of the user speed. Now the question is how to determine the type of user, whether fast or slow, when it is within the WLAN coverage area? A fast user can become slow temporarily due to various conditions such as traffic signals, turns, etc. Is the speed alone sufficient to determine whether a user is slow or fast? If not then (i) What other parameters can be used to determine whether a user is fast or slow and, ii) How can they be obtained? In fact, this lack of clarity inspired the researcher to develop a vertical Handoff decision algorithm to solve vertical handoff problems. 1.3 Scope of thesis ‘ With greater mobility and easy acces, telecommunication consumers have become demanding, seeking services anywhere and anytime. Thus, the integration of WLAN (Wireless LAN), Wimax and cellular networks such as WCDMA (wideband CDMA) system should be error free for seamless efficient communication which is the 4th generation technology. The seamless and efficient handover between different access technologies known as vertical handover is essential and remains a challenging problem. The 4G is seen as convergence and integration of various wireless access technologies. The existing cellular systems such as GSM and CDMA2000 support low bandwidth over a large coverage area. However, the wireless networks such as WLAN supports high bandwidth over a short coverage area. Moreover one of the major design issues of 4G is the support of vertical handover. Interestingly this is different from a ‘horizontal handoff’ between different wireless access points that use the same technology. Switching between two dissimilar networks for mobile terminal (e.g. between UMTS WLAN) is termed as Vertical Handover A vertical handover involves two different network interfaces for different wireless technologies. It can happen in two ways. Firmly when the mobile user moves into the network that has higher bandwidth and limited coverage, a vertical handover request is generated since the mobile user may want to change its connection to the higher bandwidth network to enjoy the higher bandwidth service. This type of vertical handover is called downward vertical handoff. Secondly when the mobile user moves out of its serving higher bandwidth network, it has to request a vertical handover to change its connection to the network with low bandwidth and wide coverage. This type of vertical handover is called upward vertical handover. Chapter-2 Research objectives 2.1 Objectives The present research aims at making comparison between various existing multiple attribute decision making algorithms for realization of vertical handoff such as MEW (Multiplicative Exponent Weighting), SAW (Simple Additive weighting), TOPSIS (Technique for order preference by similarity to ideal solutions) and GRA (Grey relational Analysis) which are MADM (Multiple attribute decision making) ranking algorithms and the proposed vertical decision algorithm. For this comparison, various heterogeneous networks such as UMTS (Universal Mobile Telecommunication services), WLAN (Wireless Local area networks), WiMAX (Worldwide interoperability for microwave access) need to be taken into consideration. Comparison will be mostly on the basis of various parameters such as bandwidth, jitter, packet delay, packet loss, etc. In addition, the comparison may be for different types of traffics such as data connections and voice connections. As all the above mentioned algorithms are multiple attribute algorithm, due importance is given to parameters to be considered in the algorithms. The performance evaluation of the proposed decision algorithm should be done on the basis of parameters mentioned above. For various types of traffics, how the algorithm performs can be seen. Depending on the performance, we can conclude Which algorithm is suitable for which traffics. In voice connections, 70 % importance is given to the packet delay and jitter i.e. by assigning weights to these parameters and equal distribution of weights to the other parameters or attributes. If any of the algorithms performs well then that particular algorithm can be considered to be best suited for voice connections. In da ta connections, 70% importance is given to the parameters such as bandwidth i.e. by assigning the weight to the bandwidth and remaining weight is equally distributed among the parameters. If any of the algorithm performs well in this case, then the particular algorithm is suitable for the data connections. The ultimate aim being development of a decision making algorithm which works well for both voice connections and data connections. ‘ 2.2 Methodology In order to realize vertical handoff using the existing multiple attribute decision making algorithm and evaluate the performance of each of the algorithms along with the proposed algorithm, we are considering the selection of network in 4G environment. Here, three types of networks such as UMTS (Universal Mobile Telecommunication services), WLAN (Wireless Local area networks), WiMAX (Worldwide interoperability for microwave access) are combined and there will be two networks of each type. In this thesis, four decision criteria are evaluated and compared to realize vertical handoff considering the available bandwidth (Mbps), packet delay (ms), packet jitter and packet loss (per 106 packets). The range of value for various parameters are as follows: Available bandwidth for UMTS network 0.1-2Mbps, Packet delay for UMTS network 25-50ms, Jitter for UMTS network 5-10ms. Bandwidth for WLAN network 1-54Mbps, Packet delay for WLAN network 100-150ms, Jitter for WLAN network 10-20ms. Bandwidth for Wimax network is 1-60Mbps, while for packet delay for Wimax network is 60-100ms, and Jitter for Wimax network is 3-10ms.The values for the weights to be assigned for different services are considered as Case1: packet delay and jitter are given 70 % importance and the rest is equally distributed among other parameters, this case is suited for voice connections and whereas Case 2: available bandwidth is given as 70% importance, this case is suited for data connections. For each algorithm, 10 vertical decisions were considered of each case separately. Performance evaluation is done for two cases namely voice connections and data connections. These cases are evaluated using MATLAB v7.6 release 2009 software tool. Next, by using artificial neural network, we can design a system to take vertical handoff decision. Here, input parameters such as samples of received signal strength and bandwidth is applied to input layer, hidden layer does some processing depending upon the number of neurons and the algorithm chosen. The output layer gives the ID of selected candidate network. In, ANN-based method, there is handoff between WLAN and Cellular networks. Here, two parameters are taken into consideration i.e. RSS a Bandwidth as an input for neural network. The RSS samples for training neural network for both WLAN cellular networks are -60dBm,-70 dBm,-80 dBm,-90 dBm. Similarly, bandwidth samples for WLAN are 54, 30,10,1 Mbps. Bandwidth samples for cellular network are 14.4, 9.6, 4.5,2 kbps. By using combination of RSS bandwidth parameters, we could make 256 samples of input for ANN. These samples of output samples for vertical handoff decision are also fed to ANN. Using Levenberg-Marquardt method for ANN, 180 samples are used for training, 38 samples for validation and 38 samples for testing. Based on ANN developed system, it could take vertical handoff decision from cellular to WLAN. Lastly, ns-2 software tool can also be used. NS-2 simulation is done using nodes of 802.11 and nodes of 802.16 Wimax. Four nodes of 802.11 nodes (Access points) are used and four nodes of 802.16 nodes (Base station) NIST module of 802.16e are used in ns-2. In this case, out of the existing algorithm best algorithm with best score is selected for triggering vertical handoff decision. Here, in this case, various parameters such as Bandwidth, Bit error rate, trust level etc were considered for vertical handoff decision. This can be tested against various available traffics in ns2 such as CBR (Constant bit rate) which corresponds to real time traffic (for voice communication) and FTP (file transfer Protocol) which corresponds to non real time traffic. The performance evaluation for various traffics can be done on various parameters such as Packet delivery ratio, throughput, jitter and packet dropping ratio etc with simulation time. 2.3 Related Work Enrique Stevens Navarro and Vincent W.S.Wong [2], in their paper, have compared four different vertical handoff decision algorithm namely, MEW (Multiplicative Exponent Weighting), SAW (Simple Additive Weighting), TOPSIS (Technique for Order Preference by Similarity to Ideal Solution), and GRA (Grey Relational Analysis). All four algorithms allow different parameters (e.g., bandwidth, delay, packet loss rate, cost) to be considered for vertical handoff decision [2]. Both Authors found that MEW, SAW, and TOPSIS provide almost the same performance to all four traffic classes. Only GRA gives a slightly higher bandwidth and lower delay for interactive and background traffic classes. Jose.D.Martinez, Ulises Pinedo-Rico and Enrique Stevens Navarro, in their paper, have given a comparative analysis of the multiple attribute decision algorithms [3]. In this paper, the authors provided a simulation study of several vertical handoff decision algorithms in order to understand its performance for different user applications. They considered two different applications: voice and data connections. Algorithms such as SAW (Simple Additive Weighting) and TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) are suitable for voice connections. These algorithms provided the lower values of jitter and delay packet available in a 4G wireless network. In a data connection case, GRA (Grey Relational Analysis) and MEW (Multiplicative Exponent Weighting) algorithms provided the solution with highest available bandwidth necessary for this application. Chapter-3 Classification of vertical handoff algorithms 3.1 Need for vertical handoff Currently, the trend in mobile communications is not one network technology replacing another, but the interoperability between different overlapping networks. Therefore it is obvious that many wireless networks will coexist and can complement each other in an all-IP based heterogeneous wireless network. This can facilitate mobile users’ access to internet easily and connectivity of IP anywhere, anytime using the ‘best’ possible network. This is mainly due to the fact that different wireless networking technologies have their own advantages and drawbacks. Access to various wireless systems results in heterogeneous networks that can offer overlapping coverage of multiple networks with different technologies. For example, low cost and high speed Wi-Fi (WLAN) network will be accessible within limited range of ‘hot-spot’ areas and will be complimented with cellular network offering wide area coverage such as UMTS or Wimax. As a consequence, some fundament al problems must be solved for the users to navigate a 4G wireless network seamlessly. For this, mobile terminal equipped with multiple interfaces to handle different technologies is required. Furthermore, applications running on mobile terminal with multi-mode terminals in a 4G environment can switch between different networks supporting different technologies without degrading the quality of the link. But the Internet routing model forces mobile terminal to find new IP address for an interface while roaming in another network in 4G environment. It is assumed that applications can easily manage mobility and can handoff to the best possible network; of course some method is required to adjust media streams to the bandwidth available. 3.1 Types of vertical handoff There are various ways to classify vertical handoff algorithms. In this thesis, we have classified the vertical handoff algorithms into four groups based on the handoff criteria as given below: RSS-based algorithms: RSS is used as the main handoff decision criteria in this group. Different strategies have been developed to compare the RSS of the present point of attachment. In this RSS-based horizontal handoff decision, strategies are classified into the following six subcategories namely: relative received signal strength, relative received signal strength with threshold, relative received signal strength with hysteresis and threshold, and prediction techniques. For vertical handoff decision, relative received signal strength cannot be applicable since the signal strength from different types of networks cannot be compared directly due to the different technologies involved. For example, different thresholds for different networks. Furthermore, other network parameters such as bandwidth are combined with RSS in the vertical handoff decision process. Bandwidth-based algorithms: Available bandwidth for a mobile terminal is the main criterion in this group. In some algorithms, both bandwidth and signal strength information are used in the decision process. Depending on whether RSS or bandwidth is the main criteria an algorithm is categorized either as signal strength based or bandwidth based. Cost function based algorithms: This class of algorithms combine metrics such as monetary cost, security, bandwidth and power consumption in a cost function based algorithm, and the handoff decision is made by comparing the score of this function for the candidate networks. Different weights are allotted to the different input parameters depending on the network conditions and user preferences. ANN and fuzzy logic based algorithms: These vertical handoff decision algorithms attempt to use richer set of inputs than others for making handoff decisions. When a large number of inputs are used, it is very difficult or impossible to develop, formulate handoff decision processes. Analytically hence, it is better to apply machine learning techniques to formulate the processes. The survey reveals that for the fuzzy logic and artificial neural networks based techniques can be used. The Fuzzy logic systems allow expertise of humans for qualitative thinking to be incorporated as algorithms to enhance the efficiency. If there exists comprehensive set of input-desired output pattern, artificial neural networks can be trained to create handoff decision algorithms. By using consistent and real-time learning techniques, the systems can monitor their performance and change their own structure to create very effective handoff decision algorithms. 3.3.1 RSS based vertical handoff In this, the handoff decisions are made by comparing RSS (received signal strength) of the current network with the preset threshold values. These algorithms are less complex and may be combined with other parameters such as bandwidth, cost etc to have a better handover decisions. We describe here three RSS based algorithms in the following sections. A) ALIVE-HO (adaptive lifetime based vertical handoff ) algorithm – Zahran, Chen and Sreenan proposed algorithm for handover between 3G networks and WLAN by combining the RSS with an estimated lifetime (duration over which the current access technology remains beneficial to the active applications). ALIVE-HO always uses an uncongested network whenever available. It continues using the preferred network (i.e. WLAN) as long as it satisfies the QoS requirements of the application [5]. Two different vertical handoff scenarios let us discuss: Moving out of the preferred network (MO) and Moving in to the preferred network (MI), where the preferred network is usually the underlay network that provides better and economical service. Hence, extending the utilization of WLAN as long as it provides satisfactory performance is the main consideration of vertical handoff algorithm design. We observe the method through the following scenarios. In the first scenario, when the MT moves away from the coverage area of a WLAN into a 3G cell, a handover to the 3G network is initiated. The handover is done under following conditions: (a) RSS average of the WLAN falls below predefined threshold. (MO threshold) and (b) the estimated lifetime is at least equal to the required handoff signaling delay. The MT continuously calculates the RSS mean using the moving average method.[4] [K] = Here [k] is RSS mean at time instant k, and Wav is the window size, a variable that changes with velocity of the velocity of mobile terminal. Then, the lifetime metric EL [k] is calculated by using [k], ASST Application signal strength threshold),S[k],RSS change rate. EL[k] = [k] ‘ ASST S[k] ASST (Application signal strength threshold) chosen to satisfy the requirements of the active applications. S[K] represents RSS decay rate. In second scenario, when the MT moves towards a WLAN cell, the handover to the WLAN is done if the average RSS is larger than MI Threshold. WLAN and the available bandwidth of the WLAN meet the bandwidth requirement of the application. Table 3.1 given below shows lost frames during the handoff transition area for the received stream. ASST (in dBs) -90 -89 -88 -87 -86 -85 Lost frames_100kbit/s 13.3 5 3 0.67 0 0 Lost frames_300kbit/s 38 28 4 0.33 0 0 Table 3.1 Frames lost corresponding to ASST [5] Based on the results obtained and subjective testing, the optimal value for UDP based streaming is chosen as -86dB. Firstly by introducing EL[k], the algorithm adapts to the application requirements and reduces unnecessary handovers. Secondly, there is an improvement on the average throughput for user because MT prefers to stay in WLAN cell as long as possible. However, packet delay grows due to the critical fading impact near the cell edges, which may result in severe degradation in the user perceived QoS. This phenomenon results in a tradeoff between improving the system resource utilization and satisfying the user QoS requirements. This issue can be critical for delay sensitive applications and degrade their performance. Here ASST is tuned according to various system parameters, including delay thresholds, MT velocities, handover signaling costs and packet delay penalties. B) Algorithm on Adaptive RSS Threshold Mohanty and Akyildiz, in their paper, have proposed a WLAN to 3G handover decision method [6]. In this method, RSS of current network is compared with dynamic RSS threshold (Sth) when MT is connected to a WLAN access point. We observe the following notations with reference to fig 3.1 which shows a handoff from current network (AP) referred as WLAN, to the future network (BS), referred as 3G. Fig 3.1 Analysis of handoff process [6] * Sth: The threshold value of RSS to initiate the handover process. Therefore, when the RSS of WLAN referred to as ORSS (old RSS) in fig 3.1 drops below Sth, the registration procedures are initiated for MT’s handover to the 3G network. * a:The cell size we assume that the cells are of hexagonal shape. d: It is the shortest distance between the point at which handover is initiated and WLAN boundary. We observe the Path loss Model given by; Pr(x) = Pr (d0) + Where x is the distance between the Access Point and Mobile Terminal, and Pr (d0) is the received power at a known reference distance (d0). The typical value of d0 is 1 km for macrocells, 100m for outdoor microcells, and 1m for indoor picocells. The numerical value of Pr (d0) depends on different factors such as frequency, antenna heights, and antenna gains, is the path loss exponent. The typical values of ranges from 3 to 4 and 2 to 8 for macrocellular and microcellular environment. – Is a Zero mean Gaussian random variable that represents the statistical variation in Pr(x) caused by Shadowing. Typical std. deviation of is 12 dB. We observe the path loss model applied to the scenario. Pr (a ‘ d) = Pr (a) + Pr (a ‘ d) = Pr (a) + 10 log Sth = Smin + 10 log When the MT is located at point P, the assumption is that it can move in any direction with equal probability, i.e. the pdf of MT’s direction of motion is f = – †.’.(1) As per assumption, that MT’s direction of motion and speed remains the same from point P until it moves out of the coverage area of WLAN. As the distance of P from WLAN boundary is not very large, this assumption is realistic. The need for handoff to cellular network arises only if MTs direction of motion from P is in the range [ ] can move in both directions. Where = arctan otherwise the handoff initiation is false. The probability of false handoff initiation is using (1) is Pa = 1 – P (unfavourable event ) = 1 ‘ P ( favourable event ) = 1 – = 1 – †.’.(2) When the direction of motion of Mobile Terminal from P is, the time it takes to move out of the coverage area of WLAN cell i.e. old base station is given by time = from fig 3.1 Cos = Sec = , x = d sec Hence t = t= †.’.(3) Pdf of is f = â€Å"{† 1/(2†_1 ) -†_1†Ã¢â‚¬ _1 {0 otherwise from (3) , t is a function of i. e. t = g ( ) in [ ] [3] g(†)=dsec†/v Therefore pdf of t is given by f_t (t)=’_i’f_(† (†_i ) )/(g^’ (†_i ) ) †.’.(4) Where †i are the roots of equation t = g ( ) in [ ] And for each of these roots f†(†i)= for i = 1 and 2 f = + f = †.’.(5) Where g is derivative of g given by g = †.’.(6) = = g = t Using (5) (6), the pdf of t is given by f = †.’.(7) { 0 otherwise The probability of handoff failure is given by Pf = { 1 { P ( t ) { 0 †.’.(8) – handoff signaling delay and P ( t ) – is the probability that t when P (t ) = = = = arccos( ) †.’.(9) Using (8) and (9) we get Pf = { 1 { cos { 0 Pf = Since, †1 =arctan ( d/v†) Pf = Here, it shows that Probability of handoff failure depends on distance from point p to the boundary of the cell, velocity and handoff signaling delay †. The use of adaptive RSS threshold helps reducing the handoff failure probability as well as reducing unnecessary handovers. The exact value of Sth will depend on MT’s speed and handoff signaling delay at a particular time. Adaptive Sth is used to limit handoff failure. However, in this algorithm, the handoff from 3G network to a WLAN is not efficient when MTS traveling time inside a WLAN cell is less than the handover delay. This may lead to wastage of network resources. 3.3.2 Bandwidth based vertical handoff algorithm A Signal to Interference and Noise Ratio (SINR) Based algorithm Yang, in his paper,[7] presented a bandwidth based vertical handover decision method between WLANs and a Wideband Code Division Multiple Access (WCDMA) network using Signal to Interference and Noise Ratio (SINR) algorithm[7]. The SINR calculation of the WLAN (wireless LAN) signals is converted into an equivalent Signal to Interference and noise Ratio to be compared with the Signal to Interference and noise Ratio of the Wideband Code Division Multiple Access channel †AP =†AP [(1+ †BS/ †BS) WBS/ WAP -1] where †AP and †BS are the Signal to Interference and noise Ratio at the mobile terminal when associated with Wireless local area network and Wideband Code Division Multiple Access, respectively. † is the dB gap between the uncoded Quadrature Amplitude Modulation and channel capacity, minus the coding gain, and †AP equals to 3dB for Wireless local area network and †BS equals to 3dB for Wireless local area network, as stated by the authors. WAP and WBS are the carrier bandwidth of wireless local area network and Wideband Code Division Multiple Access links. Signal to Interference and Noise Ratio based handovers can provide users with higher overall throughput than RSS based handovers since the available throughput is directly dependent on the Signal to Interference and Noise Ratio, and this algorithm results in a balanced load between the wireless local area network and the Wideband Code Division Multiple Access networks. But such an algorithm may also int roduce excessive handovers with the variation of the Signal to Interference and Noise Ratio causing the node to hand over back and forth between two networks, commonly referred to as ping-pong effect. A Wrong Decision Probability (WDP) Prediction Based algorithm C.Chi, Cao, Hao and Liu, in their paper ‘Modeling and analysis of Handover algorithms’, have proposed a Vertical Handover decision algorithm based [8] on the Wrong Decision Probability (WDP) prediction. The Wrong Decision Probability is calculated by combining the probability of unnecessary handoff and the missing handoff. Assume that there are two networks i and j with overlapping coverage, and bi and bj are their available bandwidth. An unnecessary handoff occurs when the mobile terminal is in network i and decides to handoff to j, but bj is less than bi after this decision. A missing handoff occurs when the mobile terminal decides to stay connected to network i, but bi is less than bj after this decision. A handover from network i to network j is initiated if Pr † x l0 or bj – bi ‘ L, where Pr is the unnecessary handover probability, † is the traffic load of network i, l0 = 0.001, and L is a bandwidth threshold. The authors show that this alg orithm is able to reduce the Wrong Decision Probability and balance the traffic load; however, received signal strength is not considered. A handoff to a target network with high bandwidth but weak received signal is not desirable as it may bring discontinuity in the service. 3.3.3 Cost Function based vertical handoff algorithm A Cost Function Based algorithm with Normalization and Weights Distribution Hasswa, N. Nasser, and H. Hassanein, in their paper ‘A context-aware cross-layer archi- tecture for next generation heterogeneous wireless networks’, have proposed a cost function based handover decision algorithm in which the normalization and weights distribution methods are provided. A quality factor of network is used to evaluate the performance of a handover target candidate as Qi = WCCi + WSSi + WPPi + WdDi + WfFi where Qi is the quality factor of network i, Ci, Si, Pi, Di and Fi stand for cost of service, security, power consumption, network condition and network performance, and Wc, Ws, Wp, Wd andWf are the weights of these network parameters. Since each network parameter has a different unit, a normalization procedure is used and the normalized quality factor for network n is calculated as Wc(1/Ci) WSSi WP(1/Pi) Qi = †__________ + __________ + _______ max((1/C1),’..(1/Cn)) max(S1,’..Sn) max((1/P1),’..(1/Pn)) WdDi WfFi + ________ + ________ max (D1,’..Dn) max(F1,’..Fn) A handoff necessity estimator is also introduced to avoid unnecessary handovers High system throughput and user’s satisfaction can be achieved by introducing Hasswa’s algorithm, however, some of the parameters such as security and interference levels are difficult to calculate. A Weighted Function Based Algorithm R. Tawil, G. Pujolle, and O. Salazar in their paper presented a weighted function based[10] Vertical handover decision algorithm which transfers the Vertical handover decision calculation to the visited network instead of the mobile terminal. The weighted function of a candidate network is defined as Qi = WBBi +WDp 1/DPi+WC 1/Ci Where Qi represents the quality of network i, Bi, DPi and Ci are bandwidth, dropping probability and monetary cost of service, and WB, WDp and WC are their weights, where, WB +WDp +WC = 1 The candidate network with the highest score of Qi is selected as the handover target. By giving the calculation to the visited network, the resource of the mobile node can be saved so that the system is able to achieve short handoff decision delay, low handoff blocking rate and higher throughput. However, the method requires extra cooperation between the mobile node and the point of attachment of the visited network, which may cause additional delay and excessive load to the network when there are large number of mobile nodes. 3.3.4 ANN based vertical handoff algorithm A Multilayer Feedforward Artificial Neural Network Based Algorithm N. Nasser, S. Guizani, and E. Al-Masri, in their paper, developed a [11] Vertical handover decision algorithm based on artificial neural networks (ANN). The topology of the ANN consists of an input layer, a hidden layer and an output layer. The input layer consists of five nodes representing various parameters such as cost, RSS, bandwidth etc of the handoff target candidate networks. The hidden layer consists of variable number of nodes (neurons) which are basically activation functions. The output layer has one node which generates the ID of the candidate network of the handover target. All the neurons use sigmoid activation function. The authors have assumed the same cost function as in this work and also for ANN training they have generated a series of user preference sets with randomly selected weights. Then the system has to be trained to select the best candidate network among all the candidates. The authors have reported that by properly selecting the learning rate and the acc eptable error value, the system is able to find the best available candidate network successfully. Nevertheless, the algorithm suffers from a long delay during the training process which may lead to connection breakdown. A Method That Uses Two Neural Networks Pahlavan, in his paper, has proposed two neural [12] network based decision methods of vertical handoff. Here, only the vertical handoff mechanism is discussed. In the method for vertical handoff, an artificial neural network is used for handoffs from the Wireless local area network to the General Packet Radio Service (GPRS). The Artificial neural network consists of an input layer, two middle layers and an output layer. Mobile node does periodical measurements of RSS and five most recent samples of RSS are fed into the ANN. The output is a binary signal: The value ‘1’ leads to a handover to the General Packet Radio Service, and the value ‘0’ means that the mobile terminal should remain connected to the access point. The ANN is trained before it is used in the decision process. Training is done by taking a number of RSS samples from the access point while minimizing the handover delay and ping-pong effect. This algorithm can reduce the number of handovers by eliminating the ping-pong effect, but the paper does not provide details on how exactly the neural network is trained and why the particular parameters are taken into consideration. This algorithm also has the short coming of the algorithm complexity and the training process to be performed in advance. Summary: From the above discussion, it can be concluded that RSS based Vertical handoff algorithms can be used between microcellular and macro cellular networks. The network candidate with most stable RSS being the selection criteria. These algorithms are simple, but due to the fluctuation of RSS, they are less reliable. Bandwidth based Vertical handoff algorithms can be used between any two heterogeneous networks. The network candidate with highest bandwidth is the selection criteria. These algorithms are simple. But, due to the changing available bandwidth, these algorithms are less reliable. Cost function based Vertical handoff algorithms can be used between any two heterogeneous networks. Here, the inputs are various parameters such as cost, bandwidth, security etc The network candidate with highest overall performance is the selection criteria. These algorithms are complex. But, due to the difficulty in measuring parameters such as security etc, they are less reliable. ANN and Fuzzy logic based Vertical handoff algorithms can be used between any two heterogeneous networks. Here, the inputs are various parameters such as RSS, cost, bandwidth, security etc depending on different methods. The network candidate with highest overall performance is the selection criteria. These algorithms are very complex. But, due to training of system, they are highly reliable. ‘ Chapter-4 Algorithms and Methodologies 4.1 Variance based vertical handoff algorithm Proposed algorithm is variance based algorithm which calculates the variance of parameters such as delay, jitter, bandwidth and packet loss for various networks such as UMTS,WLAN,Wimax and the network with most of the parameters with minimum variance being selected. In our proposed algorithm, handoff metrics such as delay, bandwidth, jitter, packet loss etc are included Fig 4.1 Flow Chart of variance based algorithm Variance = ‘(x-†)’^2/N , where x is any metrics such as delay, bandwidth, jitter etc and † is its mean of a set of samples of the particular parameters. N is set of samples. In this algorithm, whenever the signal strength of a mobile terminal drops below threshold ,there is request from mobile terminal for handoff to the network which is accessible. The algorithm checks whether the visitor network available or not, if visitor network is available ,it will broadcast required parameters such as packet delay, jitter, packet loss and bandwidth etc. The variance of the broadcasted parameters are calculated based on the number of samples received for each parameter. Then, the candidate network (Visitor network) having most of the minimum variance of the parameter is selected. In this case, variance of delay, jitter, packet loss and bandwidth are considered for the set of 100 samples received. Here, variance of packet delay is calculated as: †_d^2 = ‘(D-†_d)’^2/N Where, †d is the variance of the packet delay parameter, D is the packet delay at that instant ,†d is the mean of the packet delay values received and N is the total number of samples for packet delay parameters(which is 100 in this case). Similarly, variance of bandwidth is calculated as: †_B^2 = ‘(B-†_B)’^2/N Where, †B is the variance of the Bandwidth parameter, B is the Bandwidth at that instant ,†B is the mean of the bandwidth values received and N is the total number of samples for bandwidth parameters(which is 100 in this case). In the same way, variance of Jitter is calculated as: †_J^2 = ‘(J-†_J)’^2/N Where, †J is the variance of the Jitter parameter, J is the Jitter at that instant ,†J is the mean of the jitter values received and N is the total number of samples for jitter parameters(which is 100 in this case). In the same way, variance of Packet loss is calculated as: †_P^2 = ‘(P-†_P)’^2/N Where, †P is the variance of the packet loss parameter, P is the packet loss at that instant ,†P is the mean of the packet loss values received and N is the total number of samples for packet loss parameters(which is 100 in this case). Out of these variance †_d^2 , †_B^2, †_J^2, †_P^2, the candidate network most of them with minimum values will be selected. Score† =’arg’_(i=1)^MMAX(min †_d^2 , †_B^2, †_J^2, †_P^2) The candidate network which satisfies above equation is selected. Where M is the number of candidate network. 4.2 SNR based vertical handoff algorithm Proposed algorithm is an SNR based algorithm which calculates the value of SNR of parameters such as delay, jitter, bandwidth and packet loss for various networks such as UMTS, WLAN, Wimax with the network with maximum SNR being selected. In our proposed algorithm, handoff metrics such as delay, bandwidth, jitter, packet loss, etc are included Pages: Page 1, Page 2

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Moreover, using the chemicals and the development of the coffee industry adversely affect habitat and species decline. In addition, forests are cut down to coffee production affects the environment and soil erosion. According to World Wildlife Fund (WWF), â€Å"converting forest to tea and coffee agriculture can also create erosion and soil loss† (WWF 2010) ; yet the farmers have no choice and/or the opportunity to change. According to the International Coffee Organization or ICO â€Å"Coffee production in 2012 was 144 611 000 bags, mostly from less developed countries such as, Brazil 50 826 000 bags. Vietnam 22 000 000 bags and Indonesia 12 730 000 bags â€Å" (ICO 2013), though coffee production is highly ranked in the world, but farmers still do not get enough money to pay for life, for example, Vietnam in 2012, producing nearly 30 % of world coffee production but the turnover is only 10 % of the total trade value obtained from the global industry, the main reason is due to their ability to improve processing of value and coffee products are limited, coffee roasting plants in countries with rates lower than 10%, when farmers sells 1kg of coffee beans, farmers gets about 2 dollars or an average price of one cup of coffee oversea, yet 1 kg of coffee can make 50 cups. In addition, the links between farmers and enterprises are not strong, the lack of information on farmers markets, so farmers often extorted. Moreover, the risk of crop failure is the fear of the coffee growers. Most of the profits from coffee for export processing enterprises, coffee farmers only enjoy a small percentage. That has caused insecurity for farmers. Solution to this problem is the fair trade. According to Wikimedia, Fair trade coffee is coffee that is certified as having been produced and marketed to a stated set of standards. Many Customers pay a higher price when buying coffee with the certification logo or brand in the Belief Furniture , by doing so, they are helping farmers in the Third World . In particular, the fair trade coffee movement gives a reasonable price to the Farmers who were being a low wage labor exploitation. However, achieve certification of fair trade, farmers must meet several conditions of production as farmers have to meet a large variety of production standards : there are limits on the use of child labor , pesticides , herbicides , genetically modified products , etc. With these standards met, both consumers and farmers can benefit, with farmers getting the sufficient amount of money for their products, and the consumers getting their product knowing it’s safe to consume and has no effect on the producers financially or ethnically. These farmers must cooperate with businesses to produce the certified products, such amounts received will be higher and the lives of the farmers would be better. In addition, consumers should choose certified products in the supermarket or the market as this will support and will be helpful for farmers. In conclusion, fair trading is the way for farmers and coffee producers to get a higher amount, and will change lives for the better. Therefore farmers should choose fair trade to ensure benefits and consumers should choose products that have been certified to support the farmers. Reference * The problem with Fair Trade Coffee. * Retrieved August 30, 2013, from http://www. ssireview. org/articles/entry/the_problem_with_fair_trade_coffee * Coffee Production and Labor * Retrieved August 30, 2013, from http://www. organicconsumers. org/starbucks/coffeelabor. htm * Fair Trade Coffee * Retrieved August 30, 2013, from http://en. wikipedia. org/wiki/Fair_trade_coffee * International Coffee Organization- EXPORTING COUNTRIES: TOTAL PRODUCTION * Retrieved August 30, 2013, from http://www. ico. org/prices/po. htm * Health and effect of Coffee. * Retrieved August 30, 2013, from http://en. wikipedia. org/wiki/Health_effects_of_coffee * Environmental Impacts of Coffee and Tea Production * Retrieved September 2, 2013 from http://www. hellogreentomorrow. com/blog/2010/11/environmental-impacts-of-coffee-and-tea-production.

The safety features in modern cars

The safety features in modern cars There are many different types of safety feature in cars. The different safety features all have their own thing that they do. There are nine very important safety features that are needed in cars. They are seatbelts, airbags, head injury protection, head restraints, antilock brake system, traction control, all wheel drive, electronic stability control and weight. The two safety features that will be discussed in this report will be airbags and traction control. These two safety features will be found in most or even all modern cars. Airbags is a restraint that is used to prevent the driver, of the car, does not hit the dashboard and the steering wheel, which could cause serious injuries to the neck and head. Airbags will help the driver if he/she is wearing a seatbelt. â€Å"To date statistics,† in America, â€Å"show that airbags reduce the risk of dying in a direct frontal car crash by about 30 percent.† This quote is taken from How stuff Work? How airbags work? The law of motion that is used for airbags is Momentum, unless there is an outside force acting on the object. One of the main goals of airbags is to slow down the driver and its passengers motion as slowly and as evenly as possible. There are three main parts to airbags, they are; the bag, the sensor and the inflation system. In this report I will be discussing the three parts briefly. The bag is made up of a thin piece of nylon fabric, which is folded into the steering wheel, or dashboard, or the seat, or the door. The sensor is a device that allows the bags to know when it has to inflate when there is a force on the car that has a speed of 16km/h to 24km/h. There is a mechanical switch that will be flipped if there is a sudden change in mass in the vehicle. The inflation system combines to chemicals, sodium azide and potassium nitrate, to produce nitrogen gas. The hot blast of nitrogen inflates the bag. There are many safety concerns of airbags. Airbags have to work together with seat-belts because the force at which the airbags are expelled is enough to cause serious injury if the driver and the passengers arent wearing their seatbelt. The risk zone of airbags is the first 5 to 8 cm of inflation. Airbags have been known to seriously injure or even kill children that are sitting to close to it or even thrown towards the dashboard in an emergency braking. Children should sit in the back to, so that they are protected from the force of the airbags. There are some cases, in America in particular, where drivers have deactivate there airbags in certain cases because of the amount of injuries by the over-powerful force of the airbags. The driver of the car would have to get authorisation by the National Highway Traffic Safety Administration, in America, to get an on/off switch for on or both of their airbags; authorisation was only giving if you fell into one of the four categories. These categories are: ÂÅ ¸If the driver and the passenger both have a medical condition, where the risk of the inflation of the airbags exceeds the risk without an airbag. If the driver is unable to position him-/her- self the correct distance away from the dashboard and the airbag. ÂÅ ¸ There is no rear or there is not enough room in the back of the car to put a rear-facing car seat or the driver has to monitor the childs medical condition. ÂÅ ¸ If the driver has to carry children because there is no space in the back or there is no rear seats. The deactivation of airbags will not be authorised if you have certain other problems. These problems are pacemaker, eyeglasses, angina, emphysema, asthma, mastectomy, previous back or neck injury, advanced age, osteoporosis, arthritis, and/ or pregnancy. The Newtons Law that is used for airbags is Newtons first Law. Newtons first Law states that a body will continue in its state of rest or uniform velocity unless acted on by an external resultant force. This is also known as the Law of Inertia. Inertia is that of a body which must overcome in order to produce an acceleration or deceleration. The passenger of the vehicle goes forward very rapidly because it has a uniform velocity but the body is either being held back by the seatbelt and also stopped by the airbag, so this is the resultant force, body is stopped before hitting the dashboard. Traction control system helps to improve the stability of the vehicle by controlling the amount the drive wheels can slip when you apply excess power. The output of the engine power is adjusted automatically by the system. The system, in some cases, will adjust the applied braking force on selected wheels during acceleration. Traction control is a secondary function of the anti-lock braking system. This system is becoming more common in most modern cars. Traction is the friction that the car uses to stop, get going and to stay on the road. This system is like ABS but it is in reverse. ABS prevents your wheels from freezing when you are stopping which could cause you from skidding and having an accident. Traction control does a similar thing, but instead it stops the wheels from freezing or locking up when you accelerate. The basic set-up of traction control system is that there is a mechanical linkage between the throttle and the accelerator pedal. Occasionally the mechanical linkage is replaced by an electronic drive-by-wire system. The electronic drive-by-wire system means that instead of having a direct link from the pedal, to the throttle. Instead it sends signals from an electrical connection to a sensor. The sensor then translates the information that the electronic connections give off, by the amount of pressure you put on the accelerator. Then the sensor passes on the information into a control unit and then it sees it the wheels are slipping or not. There are benefits to having traction control system installed in the car. The traction control works so effortlessly that you may never know that it is on. The benefits are that it lowers the risks of skidding and having a major accident when the vehicle is going around the corner when the road is wet. This system is very evident when you accelerate from a complete stop. If you didnt have this system, especially if you had a very powerful car, the vehicle and the tires will go in the direction in which they were not intended to go because of skidding. The system helps with regulating the amount of power that will be sent to tire, to prevent the skidding. Theses two safety features are very useful in the vehicle but both need the driver plus the passengers to wear there seatbelt. If the passengers and the driver dont wear their seatbelts they will still get seriously injured which could lead to death. The car need to be evaluated to see if the safety features are correctly put in and safe to use.

The Metamorphosis of Anne in The Diary of Anne Frank Essay example --

The Metamorphosis of Anne in The Diary of Anne Frank        Ã‚  Ã‚   A young girl, Anneliese Marie Frank, receives an empty jar of a diary for her thirteenth birthday, amidst much political strife in her new home country of Netherlands. As a German-born Jew in hiding, Anne will eventually fill her diary with over 2 years of experiences of the Secret Annex. Initially, she makes use of her newfound outlet to exhibit her growing interest to become a writer. The diary, for Anne, acts as her personal confidante before her family goes into hiding, and becomes even more valued to her during their ordeal. Eventually, in 1944, Anne will hear of an opportunity for her work to be published after the war, and sets out to revise her entries. Despite this, it does not take away from the appeal for readers of her diary. The audience, as it were, is attracted to the prospect of experiencing the life and times of a person: young, female, Jewish and in hiding. As a diary, there is no foreshadowing in its content, and although in context we und erstand the inevitable end, we suspend our disbelief to immerse ourselves in the story. The narrative voices of her diary, come with several different identities too. As "Anne", herself, complete with her own feelings of awkwardness and insecurity; "Anne", the girl who ponders and philosophizes; and "Kitty", creating an identity for her diary to lay the basis for a relationship for herself. Between the duality of her personality, and the perspective of her "diary", Anne Frank demonstrates a process in realizing her own maturity as a writer.    Living in the confinement of the Annex imposes a cruel circumstance upon Anne at a critical time in her life. As an emerging teenager, dealing... ...lf, the content of her diary demonstrates how she has melded her unique experience with her personality to carve out her own sense of self. Where she began as an innocent and somewhat naà ¯ve girl, she does not lose this sense of innocence. What she does is replace this naivete with a conscious awareness of the scope of her existence, in terms of realizing the potential for her future. It's no coincidence that being the socially inclined girl she was at school, meant she adapted to life in the Annex through a diary to create a portrait of her life in hiding through her work. For Anne, not only was her diary her personal outlet, but a prism by which she could reflect on herself through her many colourful identities.    Works Cited Frank, Anne. The Diary of A Young Girl. Eds. Otto H. Frank and Miriam Pressler. Definitive ed. New York: Bantam, 1997. The Metamorphosis of Anne in The Diary of Anne Frank Essay example -- The Metamorphosis of Anne in The Diary of Anne Frank        Ã‚  Ã‚   A young girl, Anneliese Marie Frank, receives an empty jar of a diary for her thirteenth birthday, amidst much political strife in her new home country of Netherlands. As a German-born Jew in hiding, Anne will eventually fill her diary with over 2 years of experiences of the Secret Annex. Initially, she makes use of her newfound outlet to exhibit her growing interest to become a writer. The diary, for Anne, acts as her personal confidante before her family goes into hiding, and becomes even more valued to her during their ordeal. Eventually, in 1944, Anne will hear of an opportunity for her work to be published after the war, and sets out to revise her entries. Despite this, it does not take away from the appeal for readers of her diary. The audience, as it were, is attracted to the prospect of experiencing the life and times of a person: young, female, Jewish and in hiding. As a diary, there is no foreshadowing in its content, and although in context we und erstand the inevitable end, we suspend our disbelief to immerse ourselves in the story. The narrative voices of her diary, come with several different identities too. As "Anne", herself, complete with her own feelings of awkwardness and insecurity; "Anne", the girl who ponders and philosophizes; and "Kitty", creating an identity for her diary to lay the basis for a relationship for herself. Between the duality of her personality, and the perspective of her "diary", Anne Frank demonstrates a process in realizing her own maturity as a writer.    Living in the confinement of the Annex imposes a cruel circumstance upon Anne at a critical time in her life. As an emerging teenager, dealing... ...lf, the content of her diary demonstrates how she has melded her unique experience with her personality to carve out her own sense of self. Where she began as an innocent and somewhat naà ¯ve girl, she does not lose this sense of innocence. What she does is replace this naivete with a conscious awareness of the scope of her existence, in terms of realizing the potential for her future. It's no coincidence that being the socially inclined girl she was at school, meant she adapted to life in the Annex through a diary to create a portrait of her life in hiding through her work. For Anne, not only was her diary her personal outlet, but a prism by which she could reflect on herself through her many colourful identities.    Works Cited Frank, Anne. The Diary of A Young Girl. Eds. Otto H. Frank and Miriam Pressler. Definitive ed. New York: Bantam, 1997.

The Wright brothers invent the airplane :: essays research papers

About one hundred years ago the planet earth was a much smaller place. On December 17, 1903 the Wright brothers, Wilbur and Orville, made history when they took off in flight and invented the first airplane. This is how the planet earth began shrinking geographically making it easier and quicker to travel over long distances. Wilbur was the older of the two brothers by four years. Wilbur was born in 1867 on a farm near Millville, Indiana and Orville was born in 1871 near Dayton, Indiana. As youngsters, Wilbur and Orville looked to their mother for mechanical expertise and their father for intellectual challenge. Milton, their father, brought them various souvenirs and trinkets he found during his travels for the church. One such trinket, a toy helicopter-like top, sparked the boys' interest in flying. In school, Wilbur excelled, and would have graduated from high school if his family had not moved during his senior year. A skating accident and his mother's illness and subsequent death kept him from attending college. Orville was an average student, known for his mischievous behavior. He quit school before his senior year to start a printing business. The two brothers were very intellectual and smart, but both did not ever get their high school diplomas. It just goes to show that even two of the best minds in our history didn’t have to go to college or even finish high school to become these great minds. The first time Wilbur and Orville referred to themselves as "The Wright Brothers" was when they started their own printing firm at the ages of 22 and 18. Using a damaged tombstone and buggy parts, they built a press and printed odd jobs as well as their own newspaper. In 1892, the brothers bought bicycles. They began repairing bicycles for friends, then started their own repair business. They opened up a bicycle shop in 1893, and three years later, made their own bicycles called Van Cleves and St. Clairs. While nursing Orville, who was sick with typhoid in 1896, Wilbur read about the death of a famous German glider pilot. The news led him to take an interest in flying. On May 30, 1899, he wrote to the Smithsonian Institution for information on aeronautical research. Within a few months after writing to the Smithsonian, Wilbur had read all that was written about flying. He then defined the elements of a flying machine: wings to provide lift, a power source for propulsio n, and a system of control.

Many Forms of Plagiarism :: Cheating Writing Education Essays

Many Forms of Plagiarism missing works cited One of the main goals of teachers everywhere is to guide their students to write in a narrative style that carries the reader along logically. Their job is to teach writing skills to enhance this and to help them along their learning journey. In most cases, this begins at an early age with the typical, â€Å"What I did on my summer vacation† story that almost everyone wrote every September in Grammar School. Slowly but surely, the stories got longer and as time did not permit in the classroom, they were being assigned homework. Once the student was out of the watchful eye of the teacher, control over how a student’s story was written was lost. If a student isn’t too imaginative, or is lazy, or waits until the last minute and panics, he or she may look at an alternative way of doing a paper as opposed to doing it themselves. They could have a friend write it, get one from someone in a similar course or, now in the age of the computer simply download one in a matter of seconds. All these dishonest methods of obtaining a paper are forms of plagiarism. It’s when you sign your name to someone else’s work, either in full or in part and there can be severe consequences. To combat the increasing ease of committing plagiarism, educators have had to become just as innovative as their students. Plagiarism exists throughout the educational life of students. It is kind of a test to the student to not participate in this illegal and immoral activity. Though this is a tough challenge to resist, it will make you a better student if you don’t cheat. Not only will this resistance make you a better student; it will ultimately make you a better person later on in your life. This will be the case when you get a career in which you will be responsible to make your own decisions, without the aid of any help. Most jobs no matter what they are, require some type of independent work. If someone plagiarizes throughout their life they will be in a lot of trouble once they get out of University by being unable to perform their job on their own. Plagiarism exists in many forms. The following are examples of plagiarism cases according to Brock University.

Importance of Understanding Cultural, Ethnic, and Gender Differences Essay

The United States is and will continue to be a very diverse place. More than 8 million legal immigrants came to the U. S. between 1981 and 1990, and an undetermined number of undocumented immigrants enter the United States each year. In addition, the United States includes people of many religions, languages, economic groups, and other cultural groups. In order to be a successful manager in today’s very diverse society a manager needs to be open and understanding of cultural differences, different ethnicities, and gender differences among employees. Diversity is the presence of people from a wide range of backgrounds all possessing different traits. Some possible contributors to diversity include but are not limited to differences in age, race, ethnic origin, culture, physical abilities, religion and sexual orientation. As the text book states, ‘bringing diverse workers into an organization is seldom a seamless transition. ’ People tend to prejudge and place stereotypes or generalized beliefs that all members of a group possess the same characteristics from different cultures, race, or sex; this must be overcome. To be effective, managers and employees need to recognize, respect, and capitalize on each other’s differences. By being diverse in its employees, a business has a better opportunity for new ideas and growth potential. As discussed this week in class, when the department head turned down the Jamaican friend for the position, even though he seemed better qualified, it showed stereotyping and prejudices can have a negative effect in the workplace. The situation made for an uncomfortable, even negative environment in the workplace. By the department head’s negative behavior it caused a barrier for productivity and potentially harmed working relationships. It is essential in today’s business world for managers and professionals to understand the importance of cultural, ethnical and gender differences to make a positive work environment possible. While performing the ball and sock experiment, I was put outside of my comfort zone and was forced to see what it was like in someone else’s shoes. I found the lefty experiment to be awkward and difficult. I started in the early morning as I was getting ready for work. The seemingly thoughtless tasks that I completed every morning such as showering, brushing my teeth and hair, and eating breakfast now became hard and tedious. I continued the experiment when I returned home from work. Preparing dinner as a lefty was virtually impossible and almost dangerous. Most tasks as a lefty were manageable after some time and practice, but operating a knife was not. I am sure that with a little time and patience these tasks could have become easier to me. I can see how it could be frustrating living as a lefty in a right handed world. This is the same concept as being from a different culture, ethnicity, and gender then those in your workplace. Although the transition into a new company can be difficult, with time and some adjustment it is possible. I can relate the ball in the sock experiment to the importance of understanding cultural, ethnic, and gender differences in the work place because adjusting to something that we are not accustomed to can be challenging. It is important to understand that people we come into contact with everyday come from a background that we may not know much about. It can be difficult to adjust when meeting new people or entering a new work environment. I believe an organizations success can be attributed to its ability to embrace diversity and appreciate the benefits. A workplace who supports diversity can supply an assortment of solutions to problems. A diverse workplace can facilitate a broader service range. It can allow a company to provide their service to those all around the world. I think the most significant benefit to supporting diversity in the workplace is the inspiration it gives to all of its employees to perform to their greatest capacity. Diversity allows employees to come together to accomplish a common goal as a team. Employees will feel comfortable to share their viewpoints and ideas to execute a goal or solve a problem. I believe diversity opens the door for workplaces to achieve higher productivity, result in higher profits, and benefit the community. Diversity may not be something that people are familiar with and may even have a difficult time adjusting to, which is similar to trying to using your opposite hand in daily tasks. I believe understanding diversity will show employees the importance of it in the workplace and how it can enhance the quality of work.

Foundations of Mythology Short Answers Essay

How is the word myth used popularly? For example, what does the statement, â€Å"It’s a myth† mean? In contrast, how is the word myth used in the academic context? After considering the things in the definition in your textbooks and course materials, write a definition in your own words. The word myth is used in stories told people don’t know if the stories told are true or not. My personal belief is that a myths can be both true and not true tales. My reason for this because things in the area that happened more than fifty years ago or longer could be turned into false information after the years and years of being restated, no one knows because this area has happened so long ago in time. Myths are stories that were passed on from one generation to the next one its fiction and non -fiction. Myth is used in academic context as being an explanatory narrative, & illustrates how people should act and the existing social order. They are collectively authored and are created by people traditions and oral traditions are told and retold over time. My definition of myth is something that has reason for it could be true or untrue depending on the topic; you just have to use logic to determine the truth of the quote or statement. Why do myths from different cultures around the world address such similar or universal themes? Think about how myths explain the unknown and the tribulations of mankind. The reasoning why myths from other cultures are similar is because of their story lines, they are different because every couture has their own behalf’s and way of doing things accordantly and the ways in which it has been done for generation after generation most people believe that this way is best. They share a way that is perspective, and has value and interest and could  be their own stories. In many myths your able to format we connect to each other no matter the religion choice or aspect on the different types of myths. Myths are great in explaining the unknown and the tribulations of mankind. Myths give meaning into our lives, they explain things that are unexplaning they encourage or give us great ideas about different events and in schools helping students learn the different myth types. By doing this it enables us to learn different myths that are out there and the background of them. Myths give you laughter or tears and a clearer understanding of different things going on in our current life and events that happened before our time. What is the relationship between belief, knowledge, mythology, and religion? Where do mythology and religion intersect? Where do they diverge? Think about the function of myth and religion in helping human beings cope with change, suffering, loss, and death. There are many huge differences between religion and myth they can be overlapping mythology is one component or aspect of religion knowledge is very eternal and ever changing axiom. Mythology and religion intersect at they start as explanation accepted by people are two different things, mythology isn’t a religion but a myth of stories and the studies it can explain the unexplainable religions are surely traditional stories. They diverge easily but are both the same type of things with just different labels in difference between the two is that mythology is about anything a belief which has existed with not any proof. Religion is that of what you worship or reveres the persons or objects. In cases religion and myth always help us cope with change, suffering, with loss and deaths no matter what we will all deal with these things in our own personal ways, no one will ever grieve with lose the same as another person.  How would you defend mythology’s relevance in contemporary culture? Think about familial and cultural traditions. Also, consider how mythology is used in the arts and in advertising to typify human experience. I would defend mythology’s relevance in contempary culture as being very relevant and great need in society it gives us insight on all cultures from around the entire world. I would defend the mythology perspective my family  has a tradition of having yearly trail rides in the town I am from and getting together at least once a year either thanksgiving or Christmas time this helps our family find out how we all are doing in our lives because we all become very busy Mythology is used in the arts and advertising to typify the human experiences. References www. Askville.amazon.com www.eridu.co.uk/Author/myth_religion/myth_religion. Html mythsdreamssymbols.com/Importance of myth. Html EBOOK COLLECTION: Leonard, S., & McClure, M. (2004). Myth & knowing: An introduction to world mythology. New York, NY: McGraw-Hill.