Newtons Second Law Lab free essay sample

Newton’s 2nd Law Lab Introduction: The purpose of this lab was to prove Newton’s 2nd Law; which states accelerate equals force divided by mass (a=F/m). During this lab we were trying to find out the relationship between acceleration, force, and mass by using a air track, glider with picket fence, and photogates. Before I did the lab, I had already knew that acceleration, force, and mass were related. I just didn’t know how they were related. When recording the results of this lab we had to record the applied force in Newton’s. Newtons’s is a unit of measurement represented in m(meters) divided by s2(seconds squared). I think that F/m=a because in Newton’s second law, he tells us that force is equal to mass times acceleration (f=ma), so if you take the mass and divided by both sides to cancel it out on the right, you would end up with a=f/m. We will write a custom essay sample on Newtons Second Law Lab or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Procedure: First we weighed the glider and fence with the string attached, in kg(kilograms). Then we recorded in the table. Next we weighed the mass of the hanging weight in kg and recorded it in the table. Then we found the total mass being accelerated in kg by adding the mass of the hanging glider to the mass of the hanging weight. Fourth we found the applied force by taking the mass of the hanging weight and multiplying it by 9. 8(gravity). Then we found the theoretical acceleration by using the formula a=F/m and plugged in the total mass for m and the applied force for F. By taking F and dividing it by m we can up with the theoretical acceleration. We then looked on the time graph and found the experimental acceleration by looking at the slope of the velocity time graph and recorded it on the table. Lastly we found the percent difference by taking experimental acceleration, subtracting it from the theoretical acceleration, and then dividing that answer by the theoretical acceleration. We then took that answer and multiplied it by 100 to give us a percent. We then reweighed the glider each time and increased the mass of the hanging weight. Then we repeated steps three through seven, 15 more times so we had enough data. Results/Observations: Result are on the attacked sheet. Durning the lab, I observed that the more mass that was on the hanging weight the less accretion. Also the more mass, the faster the glider went. I also noticed the more weighted you taped onto the glider the faster the glider went. Analysis/Conclusion I think a=f/m because in Newton’s second law, he tells us that force is equal to mass times acceleration (f=ma), so if you take the mass and divided by both sides to cancel it out on the right, you would end up with a=f/m. After this lab, we proved that this theory is right because when you look at the theoretical and experimental acceleration data and you look at the percent difference, they vary from 2. 6% to 18%, which is really good. The numbers are not perfect because of errors in the lab. Some of the possible errors could be from, software calculation and the way we rounded our numbers, the air track had a little bit of friction and the weight of our hanging weight could have hit the ground and fell off before the picket fence went threw the the photogate. In conclusion, our lab proved that acceleration does equal force divided mass because when we took the applied force and divided it by the total mass and come up with the theoretical acceleration, our data result came back with an average percent difference is 5. 04; which is less then 10%!

Answers to Questions About Tense

Answers to Questions About Tense Answers to Questions About Tense Answers to Questions About Tense By Mark Nichol A reader submitted three queries about which verb forms to use to indicate various tenses. Here are the questions and my responses. 1. When do you use have with another verb, and when do you omit it? (For example, â€Å"I have said yesterday . . .† vs. â€Å"I said yesterday . . . .†) When do you use had? (â€Å"I had said yesterday . . . .†) â€Å"I have said yesterday . . .† is erroneous. Use have in this type of construction only when you want to emphasize that the action occurred at an unspecified time: â€Å"I have said that I would support the policy.† (This form is called the present perfect tense.) Use had for the past perfect tense, when you want to indicate that something happened before a previous occurrence or a previous time: â€Å"I had said that I would support the policy, but that was before I realized it is unfair.† 2. When should I use would as in â€Å"I would want to eat there,† as opposed to â€Å"I want to eat there†? What is the difference? â€Å"I would want to eat there† implies or precedes a condition: â€Å"I would want to eat there if it weren’t so expensive.† â€Å"I want to eat there,† by contrast, expresses a simple desire. 3. What’s the difference between â€Å"If I can, then I will† and â€Å"If I could, then I would†? â€Å"If I can, then I will† expresses a simple desire to accommodate. â€Å"If I could, then I would† implies that, because of a condition that is unnamed or not yet named, one is unable to accommodate. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Style category, check our popular posts, or choose a related post below:Farther vs. FurtherTelling a Good Poem from a Bad OneEach vs. Both

Cultural Relativism Essay Example | Topics and Well Written Essays - 250 words

Cultural Relativism - Essay Example views of families who has common theme of central aspect of experience, evaluation, thought and reality which is relative to something else (Atran and Medin,46). In the video session, Rachel’s rejects cultural relativism since in his understanding, cultural relativism is similar to ethical relativism, which in turn leads to inability to criticize believes and practices of different societies (Atran and Medin,67). Despite the fact that relatives lines of thought a times leads to improbable conclusions, there is always something seductive about them, which has captivated wide range of thinkers from various traditions. The major philosophical issues of intellectual descendants of cultural relativism includes the multiculturalism which gives equal value for all cultures, racism which is a type of multiculturalism where individual has an erroneous idea about his or her race, political correctness, deconstructionism and postmodernisms. In the video summary of James Rachel, he explains the elements of moral philosophy by first defining the meaning of morality. He gives an example of baby Theresa who was born without auxiliary functions of her brain, the baby is left so that her organs can be used to help others, and this creates an argument that life is worthless without better interaction with each other. The other side argues that using other person’s life to fulfil the other is wrong and unethical (Atran and Medin, 98). Rachel also continues to explain that different cultures have unique customs and different ways of thinking. This shows that it would be very hard for a particular individual of one culture to understand these differences (Atran and Medin, 156). This makes it difficult to judge individual culture of living, the problem with this cultural relativism is that as an argument it does not make sense in universal truths of

Outline the key factors influencing viability of desirable development Essay

Outline the key factors influencing viability of desirable development in Croydon, and discuss how they might be effectively mediated by the local planning authority - Essay Example Lastly, are my recommendations of policies to the council and justify them. Urban planning is best defined as a form of state intervention in a development process dominated by the private sector (David, P.2). As David stated, any form of planning including bargaining, negotiation, controlling is in the purpose of producing a better urban environment for people living in the area. It is a means to achieve sustainable development including the use of scarce resources, better social inclusion, long-term economic growth, which ensures better lives for ourselves and a better environment for future generations (NPPF, 2012). Solving the existing physical and social issues by making relevant policies, planning authorities are participating into the market in the role of moderately improving the situation towards a more acceptable position. Croydon Unitary Development Plan was the development plan for the borough until the LDF comes into force in 2012. Croydon, as the largest London borough, has the highest population among all London boroughs. It has a wide variety of residential areas. The residential neighborhoods comprise distinct communities that focus on established centers. Croydon has a significant commercial city center, which is built in the purpose of regional, as well as national importance in the Vision 2020 for Croydon Metropolitan Center. It has a fully developed infrastructure including convenient traffic linking to London and efficient public transportation. UDP (2006) indicates, the development strategy takes the Croydons location, role in the economic activity, and present situation into account. The city needs to grow positively by providing a certain amount of housing to meet the market demand, a series of jobs to meet employment needs, and the implementation of the Vision 2020 for Croydon Metropolitan Centre. Meanwhile, the plan also looks for opportunities for fully development

Financial Accounitng Essay Example | Topics and Well Written Essays - 3250 words

Financial Accounitng - Essay Example Revenues are realizable when assets received in exchange are readily convertible to known amounts of cash or claims to cash. Revenues are earned when the entity has performed its duties to be entitled to compensation. There are four main transactions of this kind: Revenue from selling inventory is recognized at the date of sale (usually interpreted as the date of delivery). Revenue from performing services is recognized when services have been performed and are billable. Revenue from permission to use company's assets (e.g. interests for using money, rent for using fixed assets, and royalties for using intangible assets) is recognized as time passes or as assets are used. Revenue from selling an asset other than inventory is recognized at the point of sale. However following are the exceptions to above rule. Revenues not recognized at the time of delivery The general rule says that revenue from selling inventory is recognized at the point of sale, but there are several exceptions. Buyback agreements Buyback agreement means that a company sells a product and agrees to buy it back after some time. If buyback price covers all costs of the inventory and related holding costs, the inventory remains on the seller's books. There was no sale. Returns Companies, which cannot reasonably estimate the amount of future returns and/or have extremely high rates of returns, should recognize revenues only when the right to return expires. Those companies, which can estimate the number of future returns and have a relatively small return rate can recognize revenues at the point of sale, but must deduct estimated future returns. Revenues recognized before delivery Long-term contracts This...If buyback price covers all costs of the inventory and related holding costs, the inventory remains on the seller's books. There was no sale. Companies, which cannot reasonably estimate the amount of future returns and/or have extremely high rates of returns, should recognize revenues only when the right to return expires. Those companies, which can estimate the number of future returns and have a relatively small return rate can recognize revenues at the point of sale, but must deduct estimated future returns. This exception primarily deals with long-term contracts such as constructions (buildings, stadiums, bridges, highways, etc.), development of aircraft, weapons, and space exploration hardware. Such contracts must allow the builder (seller) to bill the purchaser at various parts of the project (e.g., every 10 miles of road built). (3) The seller is expected to complete the project, then revenues, costs, and gross profit can be recognized each period based upon the progress of construction (that is, percentage of completion). For example, if during the year, 25% of the building was completed, the builder can recognize 25% of the expected total profit on the contract. This method is preferred. However, expected loss should be recognized fully and immediately due to conservatism principle. According to Completed, contract method should be

The Usage Of Wireshark Computer Science Essay

The Usage Of Wireshark Computer Science Essay This document explains the usage of WIRESHARK, its mechanism, its detailed evaluation and demonstration. The main objective behind this report is to operate Wireshark with its powerful features, what are the limitations / Weaknesses. This document also describes the main purpose of Wireshark along with its benefits and disadvantages in a network. Finally the steps that are required to safeguard the system by using Wireshark are also dealt. Table of Contents Overview †¦Ã¢â‚¬ ¦.†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦..†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 4 Mechanism of Wireshark †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 5 Demonstration and Evaluation .†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 6 Limitations / Weaknesses .†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 15 Steps to Protect System †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 15 Literature Review †¦Ã¢â‚¬ ¦.†¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦ 16 Conclusion †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 17 References †¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦Ã¢â‚¬ ¦. 18 1. Overview: Wireshark is a great piece of free open source software for network monitoring and it is a fantastic packet sniffer. It was created by Gerald Combs a computer science graduate during his education period. In late 1990s it was known as Ethereal which was used to capture and analyse packets. However in 2006 summer due to some trademark and legal issues it was renamed to WIRESHARK. Wireshark interactively examines and investigates data from http requests, Cookies, Forms, Ethernet, Token-Ring, FDDI, live network, or a captured file. It can easily decipher data and displays it as clear as possible. It does contain some powerful features like TCP Stream which allows viewing reconstructed stream of TCP session and it also has the capability to monitor UDP and SSL streams. In the same way it allows number of protocols and media types. Wireshark uses plug-ins to eliminate new protocols. It is based on libpcap tool. Tethereal is a tcpdump like console which is included in it. It is capable of performing live capture of network packets, offline network analysis and VoIP analysis. It is also used as protocol analysis tool. Wireshark is cross platform, easy to download and install. It comfortably runs on UNIX (NetBSD, OpenBSD, Apple Mac OS X, etc.), LINUX (Dedian, Ubuntu, Slackware, etc.), Windows (Xp, Vista, 7, etc.). Wireshark is very similar to tcp dump and it can also work with GUI. It can be executed in tty mode by using Tshark as a command line tool. It can also access packets captured from other sniffers such as Wild Packets, Visual Networks Visual UpTime, Snoop, Network General Sniffer, Microsoft Network Monitor, tcp dump, CA NetMaster and many other. Users can create personalized filter strings to attain granular level of configuration. Wireshark is a top rated packet sniffer. The best powerful feature of Wireshark is tracking, detecting and decoding data by using enormous array of display filters, which allows user to extract the exact traffic required. It has a standard built in three-pane packet browser. Various protocols like Kerberos, WEP, IPsec and WPA are supported for decryption. Colori ng rules is one of the best features that applied for quick and intuitive analysis of packet list. The captured data packets can be saved to disk and that can be exported to various formats such as plain text, xml, or CSV. In a network Wireshark enables to access different Protocol Data Units as it understands number of networking protocols. The Basic part of Wireshark software is pcap tool, but when dealt withnwindows operating systems it is known as Wincap which allows Wireshark to run on the system. Promiscuous Mode is a main feature of Wireshark which allows capturing packets across the network. It works in promiscuous mode by Network Interface Card (NIC). The network administrator must either place the correct precautions or sniffers like Wireshark which poses several security threats that traverse across a network. Because of those threats Virtual Local Network uses some reliable protocols like Secure Shell (SSH), Secure Socket Layer (SSL), and Transport Layer (TLS). 2. Mechanism of Wireshark: Wireshark is a preinstalled tool used in many Linux distributions. However in Backtrack it is a preinstalled and can be used directly from the start menu/ All Applications/ Internet / Wireshark. The main purpose of this network analyser is to capture data packets. Wireshark grabs data packets for every single request between the host and server. Now a days technology is like a Gun, much more sophisticated as it can use for both good and evil. Wireshark has number of advantages, for instance, network administrators use it for trouble shooting network problems. Security engineers use it for examining the security problems in a network. Developers use it very often for debugging protocol implementations. Most of the folks use it to learn network protocols. Wireshark can measure data in a perfect manner but it cannot manipulate data. The following illustration describes the Wireshark function blocks: Wireshark function blocks. Source: http://www.wireshark.org/docs/wsdg_html_chunked/ChWorksOverview.html GTK 1/2: GTK handles all the requests (i.e) input/output for windows and it does contain source code in gtk folder. Core: The main core glue code holds the extra blocks together in which the source code is available in root folder. Epan: Epan means Ethereal Packet Analyser, it is a data packets analysing engine. It consists of Protocol Tree, Dissectors, Plugins and vast number of display filters. Source code for EPAN is available in epan folder. Protocol Tree holds the protocol information of the captured packets. Dissectors consist of number of protocol dissectors in epan/dissectors directory. Some protocol dissectors can be executed as plugins to eliminate new protocols where as its source code is available in plugins. Display Filters can be found in epan/dfilter directory and these are also display filter engine. Wiretap: The wiretap is a library which is mainly used to read and write captured packets to libpcap and other file formats on harddisk. Source code is available in wiretap directory. Capture: Capture is an engine which has captured data. It holds captured libraries which are platform independent. As a result Wireshark has number of display and capture filters. Builtbot: The Buildbot automatically reconstructs Wireshark for the changes occurred in repositories source code and brings up some problematic changes. It provides up to date binary packages. It is helpful for bugfix and fuzz test and it also shows problems which are very hard to find. Buitbot can create binary package and source package. It can also run regression tests. 3. Demonstration and Evaluation: Capturing Packets: After logging in to Wireshark Network Analyses, click on Capture then select Interfaces as shown in Fig 1. Select the required interface to capture packets. Every interface will be provided with Start and Options as in Fig 2. Start allows capturing data and Options button allow configuring the options in the interface as shown in Fig 3. Fig 1 C:UsersNarenDesktop1.png Fig 2 C:UsersNarenDocumentsNarenStudy PlaceBack UpNarenWireshark1 (3).png Fig 3 C:UsersNarenDesktop3.png Capture packets in promiscuous mode: This option lets the adaptor to capture packets not only within system but also across the network but network administrator can know about this. Limit each packet to: This option limits the maximum number of bytes to capture from each and every packet. The size includes the link layer header and other subsequent headers, so this option is generally left unset to get full frames. Capture Filters and Capture File: Capture Filters allow only specific type of protocols to enter so that it reduces amount of packets to capture. Capture File allows a file from the system to save the captured traffic. Wireshark by default uses temporary files and memory to capture traffic. Multiple files: This option stores captured data to number of files instead of a single file. When Wireshark needs to capture for a long time this option is useful. The generated file name consists of an incrementing number with the creation time captured data. Stop Capture: This option allows Wireshark to stop capturing after the given number of packets has been captured. Display Options: Update list of packets in real time option saves captured files immediately to the main screen but it slows down the capture process and packet drops can be appeared. Automatic scrolling in live capture automatically allows Wireshark to scroll the packet list (i.e.) the latest captured data. This option will work when update list of packets in real time is enable. Hide capture info dialog is to hide the information while capturing. It is better to disable this option to understand packets being captured from each protocol. Name Resolution: Enable MAC name resolution is to perform the mac layer name resolution by enabling it while capturing data. Enable network name resolution performs the network layer name resolution. It is better to disable this because Wireshark issues DNS quires to resolve IP protocols. Enable transport name resolution this attempts Wireshark to perform transport layer transport name resolution. Data can be captured with (fig3) or without (fig2) configuration the options. Click in start button to start the capturing packets. But it is better to keep the browser ready before starting the capture. Now generate some traffic and that will be captured by Wireshark. Fig 4 This was the traffic generated at that instance C:UsersNarenDocumentsNarenStudy PlaceBack UpNarenWireshark1 (4).png Fig 5 This was the traffic captured and it has many protocols like TCP, HTTP and TLSv1 etc. C:UsersNarenDocumentsNarenStudy PlaceBack UpNarenWireshark1 (5).png As shown in below fig 6, 7 protocols can be filtered by using Filter or Expression. Filters can directly sort out after typing the required addresses. But coming to Expression user must select the required addresses from the field name. Finally click Apply button on main screen, then only it will be filtered. Fig 6 C:UsersNarenDocumentsNarenStudy PlaceBack UpNarenWireshark1 (6).PNG Fig 7 The following Fig 8, Fig 9 shows the filtered HTTP addresses Fig 8 Fig 9 Wireshark grabs data for each and every request between the host and server. Traffic can also be sorted by clicking on Protocol, Time, Source and Destination. But in above Fig 9 it was filtered by using Expression. In the above Fig 9 (774 http GET) address was selected and then Wireshark displayed Frame Number, Ethernet, Internet Protocol, Hypertext Transfer Protocol and few more. Among Hypertext Transfer Protocol is very important because it consists of the following data. GET /webapps/SHU-pmt-bb†¦../bullets†¦Ã¢â‚¬ ¦ Host: shuspace.shu.ac.ukrn User Agent: Mozilla/†¦.. It provides some more details like Accept, Accept Language and few more as shown in Fig 9. In Fig 10 there is column at last which consists of hard cipher. Data like user id, password and cookies etc. will be embedded in that cipher. To view that data simply click on Analyze and next click Follow TCP Stream as shown in Fig 11. Fig 10 Fig 11 The above picture shows all the details in the captured data. The data in the Fig 11 doesnt contain user id and password because it was not login page. If it is the login page means here itself the user id and password will be displayed. Wireshark can also grab data from forms and examine cookies. Wireshark has so many options like start capture, stop capture restart live capture and save capture etc. Fig 12 and 13 shows how the captured data can be saved. It also shows the number of packets selected and captured by it. Wireshark can reuse that data for further investigation. It allows adding a new capture type to libpcap. When Tap interface is added to Wireshark, it can produce protocol statistics. Fig 12 Fig 13 4. Limitations / Weaknesses: Some sniffers have the best feature, metrics of network traffic can be counted without storing captured packets because some host may have tremendous amount of traffic and required to monitor for a long time without causing conflicts like inbound or outbound traffic. Bounce diagrams are very helpful to view TCP traffic but in Wireshark TCP Tap listener must be included to draw bounce diagrams. If Wireshark allows pair of Ethernet interfaces then it will be easy to test network latency. When comparing captures manually it is better to include SHA1, CRC and MD5 on protocols so that packet corruption can be eliminated. Wireshark required adding automatic update feature to Win32 for every month to update security features. Properties of the last used interface (MAC and IP etc.) must be made available so that it is easy to use variables. Wireshark must be able to capture an interface which is not in existence presently so that it can start capturing immediately after creating of that preferred interface and similarly to capture from USB and FireWire on platforms which are supported. It must also have a compressor to compress data while writing to harddisk. In recent times Wireshark was becoming popular in security bulletins because of several security related bugs. Protecting the system: Network administrators use Wireshark for troubleshooting the network problems. Protocol examination is a procedure used to notice in a real time. The raw data sent across the network interface is helpful for network arrangement and troubleshooting. Wireshark is used to monitoring distributed application and that monitored data can be used for detecting errors so performance will be improved. It is mainly used for examining the security problems and debugging protocol implementations. Easy to access and learn TCPIP protocols, MAC frame, IP datagram. Dag cards are specialised network monitoring cards. Multi-threading allows the capturing and also speedup the application by reducing the response time. The captured data can be used in any way depends on the persons goal. Sniffers are designed to solve network problems but in same they are malicious. It is very hard to identify sniffer because of passiveness, alternatively there are some way to detect by ARP detection technique, RTT detection and some more like SNMP monitoring. 6. Literature Review: 7. Conclusion: This report explains the operation of Wireshark Network Analyser with clear demonstration. Initially report describes the overview and outstanding features of Wireshark like TCP Steam, Promiscous Mode, TethereaI, Plugins, Three-Pane, PDU, NIC and cross platform working etc. In mechanism illustrated the internal function blocks, Interfaces and Packages of Wireshark. Next in demonstration part capturing procedure steps, configuration options and filters are described with graphical representation. This report mainly focuses on how Wireshark grabs data packets from the network and why it is the best among all the sniffers. Lastly some of the limitations/weaknesses that are present in Wireshark. The main objective of this assignment was to complete the Systems and Application Security module in ISS Masters and get idea of all the applications regarding to security stream. In particular, I would like to state that the assignment helped a lot to learn about all the options in Wireshark. Finally I thank Mr Neil for giving me this chance to explore my knowledge.

The Link Between Height and Personal Success :: Biology Essays Research Papers

The Link Between Height and Personal Success Your height won't influence what you earn as much as your race or gender, but it may well be significant. In Britain and America, the tallest quarter of the population earns 10% more than the shortest quarter. A white American man averages a 1.8% higher income than his counterpart an inch shorter (1). Economics is not the only area in which taller people win: out of the US's 42 presidents, only eight have been below average height for the time. Most have been significantly taller than the average for white adult males of their eras (2). Tall men are also more likely to be married and have children (3). Outside of normal height differences, people with growth deficiency are much more aware of the role height plays in their lives. A study done through a growth clinic showed that children with growth deficiency are more likely to have social problems. The problems included lower social competance, increased behavior problems, and low self-esteem. Another study found lower rates of employment and marriage when children with growth deficiency grew up (4). One theory of why tall people are more successful is that there is stigma attatched to height, and thus short people are seen as easier to dominate (2). Another theory is that evolutionarily, tall people had an advantage in hunting and such and were thus associated with positive traits (5). Perhaps we still retain this association unconciously. The third theory is that taller people have a better-self image, and this increased confidence makes them more successful (2). A factor that may influence both earnings and height is one's family background. Shorter men tend to come from bigger families with parents who have less education than those of taller men. This shorter height may be a factor of poor childhood nutrition, and parents with less education are more likely to have children who also receive less education and therefore earn less. Family background is not the only influence, though, as shorter men still earn less than taller men from the same background (2). Effects that appear to stem from one's adult height, though, may have a different cause entirely. Participants in one study were asked to report their heights at ages 7,11, 16, and 23. The height that affected one's adult earnings, it turned out, was not the adult height but the 16-year-old height.