...Unit 8 Assignment 1 20. Because the magnetic force which deflects the electrons is defined by F = q * v x B (v x B is the cross product of the 2 vectors), so: The force vector would always be perpendicular to both the v and B vectors. Since the force is perpendicular to the electron's velocity vector, and thus the path of the electrons, the work done by the field on the electrons is 0, because W = F*d*cos(theta), and theta=90 degrees, therefore cos(theta)=0, and W=0 If W = 0 then there is no change in the kinetic energy of the electrons, thus their speed remains constant; the acceleration provided by the magnetic field was used only to change the direction. 31. Well, it depends upon the Sensitivity setting of the metal detector. As it is clear, the threshold value of the metal detector's sensitivity can be adjusted to suit various needs. so it is obviously set to discard small variations caused by a very small pieces of metal. 34. Yes, There is nothing seperately as a DC motor or DC generator. It is simply a DC machine. It acts either as a motor or a generator depending on the input. If the input is mechanical energy, the output is electrical : this is generator action If the input is electrical, the output is mechanical torque: this is motoring action 48. when you step up the voltage with transformers you lose current. It is a trade off and motors are not 100% effective so you would have a power loss. Unit 2 Assignment 1 8. when your car...
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...Group Policy in a Mixed Client OS Environment Unit 8 Assignment 1 ITT Technical Institute Floyd Washington Jr. May 16, 2015 Group policy is a tool used for customizing, controlling, and securing Windows operating systems. It was introduced in Windows 2000 as part of the IntelliMirror technologies. Group policy can be applied at the local computer level or to OU’s, domains, or sites in an Active Directory environment. Group policy was supported by Windows XP Professional, but not XP Home Editions. Group Policy in Vista adds many settings which gives administrators more control over users and computers. In this essay I will discuss five of the newer features that was not in the older versions of windows. * The first policy that I will discuss is the Control Removable Media policy. Devices like thumb drives, flash memory card readers, and external USB hard disks made it easy for users to transfer data between two computers. Although convenient, the ease that removable media created brought about the rise in industry espionage. User could easily copy and share company secrets with competitors by copying the information on to a removable device and uploading it to another computer. Software was made available to block access to USB ports on sensitive terminals. * The second policy that I will discuss is the Control power management settings. Power management on a single computer can save energy and money. Enforcing a power management strategy can save a company...
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...A 0x00000001 error might occur specific to SCCM on a system loaded with a genuine edition of Windows 7, Windows 8, Vista and Windows XP and to be able to fix all of the same all you need to do is to simply opt for the software tool better termed as - Max Utilities. How to fix 0x00000001 error Prologue: The 0x00000001 error code is mostly triggered owing to driver specific problems and so such an error code can be shortened in two words as – ‘Driver Problem’. The occurrence of such an analogous form of error code clearly suggests that the same is explicit to the Windows Device Manger and that there are issues with the driver itself. It is not always the case that the 0x00000001 error can be bypassed by adopting fixing approaches such as restarting the PC, removing the power cord from the power supply point and removing the device from the motherboard. In all such cases, there can be no other alternative of being able to eliminate such a form of fault other than to consider opting for Max Utilities from a high PR website as VSKSoft. Many Types of Issues Which Might Flare-Up: 1)...
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...Two perand operations allowed either a register or memory to serve as one operand and either a register or constant to serve as the other. Memory operands were addressable in four ways : 1) direct 16-bit offset address; 2) indirect through a base register, optional with 8 or 16 bit displacement; 3) indirect through an index register, optional with 8 or 16 bit displacement; 4) indirectly through the sum of a base register and index register, optional with 8 or 16 bit displacement [4]. Addressing mode usage allowed register BX and BP to serve as base registers and SI and DI as index registers. This made language implementation of simple variables, arrays, based variables and stack markers all possible. Data transfer, Arithmetic, Multiplication and Division, Decimal Instruction and Logicals were all carried over and improved from the Intel 8080. Although string-manipulation was a new set of instructions not provided by the previous Intel 8080. The Intel 8086 provides a primitive group of 1-byte instructions which perform operations on byte and word strings [4]. These any many other unique advancements of the Intel 8086 set the standard of refinements and improvements for the next 40...
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...%\item Infinity function: %$ d_\infty(x, y)=max\{|x_i-y_i|, where\ i=1,....,n\}$. \end{itemize} Figure \ref{KNN} demonstrates case when k has value of 3. Therefore, the unknown point $X_u$ will be compared with three nearest neighbors. Based on results, it can be supposed as belonging to proper set. In our case, $X_u$ is the test point with unknown template. In this example k=3, euclidean distance between this point and its 3 nearest neighbors is computed. 2 of them belong to $W_1$ while 1 belongs to $W_3$ , so Xu is assigned to $W_1$ set. On different data sets, many researchers have found that the K-NN algorithm achieves high performance in their experiments \cite{kaghyan2012activity,suguna2010improved}. %However, it has three limitations: (a) calculation complexity due to the usage of all the training %samples for classification, (b) the performance is solely dependent on the training set, and (c) there is no weight %difference between samples \cite{kaghyan2012activity}. The performance of a KNN classifier depends...
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...It features: de-multiplexing capability, multiple input enable for easy expansion, typical power dissipation of 32mW, active low mutually exclusive outputs and input clamp diodes which limit high speed termination effects. The decoder has three bits binary weighted inputs pins labelled (A0, A1, A2) and when enabled they provide eight active LOW logic Outputs (O0 – O7) all of which are mutually exclusive. The LS138 has three Enable inputs of which two are active LOW logic (E1, E2) and one active HIGH logic (E3). All outputs are pulled HIGH unless input on pins E1 and E2 are logic LOW and E3 is logic HIGH. This multiple enable functions permits easy parallel expansion of the device to a 1-of-32 (5 lines to 32 lines) decoder with just four LS138s and one inverter. The LS138 can be used as an 8-output de-multiplexer by using one of the provided active LOW Enable pins as the data input and using the other Enable inputs for strobes signal. It is to be noted that the unused Enable inputs must be permanently tied to their correct active LOW logic level or active HIGH logic level...
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...as well as the operations multiplication and/or division (in order from left to right), finally, addition and/or subtraction (in order from left to right). The jump from fifth to sixth grade introduces the step of evaluating exponents. In relation to the progression between sixth and seventh grade is evaluating algebraic expressions in which students apply the order of operations. Moving into eighth grade students use order of operations to simplify numerical operations and for solving algebraic expressions. Exponents/ Squares/Square Roots is officially not introduced until students enter the sixth grade, but, many students will have some knowledge of exponents due to the exploration of area measured in square units. Upon an investigation of square units in relation to exponents, many students will establish a definition of square roots. In eighth grade, students further explore square roots in relationship to perfect squares. Cognitive Demand This task would be Higher-level demands (doing mathematics) based on the Levels of Demand Chart from Principals to Actions page 18 figure 3, 2014. First of all, this task cannot be solved using a specific algorithm; there is not a rehearsed approach or a predictable way to solve this task. Students are required to explore and understand the nature of order of operations to solve this task. Skills required to accomplish this task need to be accessed through prior knowledge and experiences. Analyzation of the task and examination...
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...are used to embed the information. This technique is very easy to be detected. A more secure system is for the sender to hide the text bits randomly in the image [6]. At the beginning of the encoding process, the program reserves 29 bits from the image’s header; 8 bits for inserting a letter ‘m’ which indicates if this image has text hid in it or not. This is for facilitating recognizing the image that contains hidden text from other images. 8 other bits for a letter ‘t’, indicating if the text the user entered is a text file, otherwise the text is from a text box. 3 bits are reserved for the number of LSBs the user chose (1, 2, or 3). These LSBs are based on the image’s colors (the RBG), if 1 is chosen, it means we are only hiding in the Red color, 2...
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...Introduction In this assignment I will be investigating the requirements of 3 computer set ups and how you would assemble them; the first will be a gaming pc. This is a pc that is specifically designed to run at faster speeds with a dedicated graphics chip and a high power processor. The next will be what is known as a thick client this is a home computer that would be needed to operate independently of a server but have access to the internet via a network card installed on the mother board. The final computer system I will be investigating will be a home theatre system, this is normally a smaller setup but with a dedicated sound card for the surround sound environment in most home theatre systems. I want to make this as simple as possible picking only the best but still somewhat affordable components for each and go into detail on the specific parts of each system that makes them stand out amongst the others and why...
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...Unit 8 Assignment 1 Video Summary 6 VIDEO #3.01 Topics: * Microsoft Operating Systems * Other Operating Systems Terms: * DOS – Disk Operating System is an acronym for several closely related operating systems that dominated the IBM PC compatible market between 1981 and 1995 * UNIX - is a family of multitasking, multiuser computer operating systems that derive from the original AT&T UNIX. * Command Line Interface - also known as command-line user interface, console user interface, and character user interface (CUI), is a means of interacting with a computer program where the user issues commands to the program in the form of successive lines of text (command lines). Summary: The video taught me that everything that was developed after series 9x of operating systems is built on the NT platform. Also the NT did not have a device manager or a hardware wizard as well as not supporting plug and play. I also learned that Linux was developed by a Finnish student named Linus Torvalds. This information is not really useful for me its old information that for me has no value unless I want to be a technology historian. Unit 8 Assignment 1 Video Summary 6 VIDEO #3.02 Topics: * Partitioning * Creating Partitions * Create/Delete Partitions Terms: * Partition - In personal computers, a partition is a logical division of a hard disk created so that you can have different operating systems on the same hard disk or to create the appearance...
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...It is very important to go through the process of hardening your network. Hardening is where you change the hardware and software configurations to make computers and devices as secure as possible. I choose the network layout workgroup. First with the workstations and laptops you need to shut down the unneeded services or programs or even uninstall them. I would also have installed reputable anti-virus software on the workstations. You also need a hardened image for all of your workstations. To do this you need to install a new copy of the operating system and then begin the process of hardening it. After you have one good hardened workstation you can use it as a model for all other workstations and laptops. As for the router you definitely need to protect it from unauthorized access. The router needs to be password protected and you should periodically change that password for added protection. For the cable modem you should keep all unwanted and unused ports closed. I would also schedule a regular scan of all the systems as part of my maintenance processes. These processes and procedures apply for all hardware devices. Disable remote administration, administration of your router / access point should be "local only", namely, there is no reason to let people from another country have access to your network hardware and If you need to make changes, you should be local to the device. Update the firmware. Believe it or not, consumer network hardware needs to be patched also. Check...
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...instructions in a computer program which loops endlessly. Example of an infinite loop: Set k = 1 While k < = 5 Display k End While 7. A FOR loop looks like what other loop in a flowchart? A For loop looks like a count-controlled loop. 8. Why is it critical that accumulator variables are properly initialized? An accumulator is used to keep a running total of numbers. In a loop, a value is usually added to the current value of the accumulator. If it is not properly initialized, it will not contain the correct total. 9. What is the advantage of using a sentinel? The advantage of using a sentinel is that when you are processing a long list of values with a loop a sentinel marks the end of a list of items. There is no limit to how many times a loop can execute. 10. Why must the value chosen for use as a sentinel be carefully selected? The value of a sentinel needs to be carefully selected because it can’t be mistaken as a regular value in the list. Algorithm Workbench: 3. // Declare a counter variable. Declare Integer // Constant for the maximum value Constant Integer MAX_VALUE = 100 //Display the multiples of 10 from 0 through 100 For counter = 0 to MAX_VALUE Display counter End For 4. //Declare Integer number Declare an accumulator variable Declare Integer total = 0 Declare Integer counter For counter = 1 to 10 Display “Enter a number.” Input number Set total = total + number End For Display...
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...Unit 8 – Assignment 1: DNS Zone File Assignment Requirements The Just Legal Company in Figmont, Nebraska has acquired a new Internet address – www.justafigmont.com. They want to set up a DNS server. What would a basic DNS file look like? Describe the file. A DNS Server is a hierarchical naming system for computers and resources connected to the internet. Basically each line is a text description that defines a single resource records Domain Name Servers (DNS) are the They maintain a directory of domain names and translate them to Internet Protocol (IP) addresses. Information from all the domain name servers across the Internet are gathered together and housed at the Central Registry. Host companies and Internet Service Providers interact with the Central Registry on a regular schedule to get updated DNS information. When you type in a web address, e.g., www.jimsbikes.com, your Internet Service Provider views the DNS associated with the domain name, translates it into a machine friendly IP address (for example 216.168.224.70 is the IP for jimsbikes.com) and directs your Internet connection to the correct website. The Domain Name System is a hierarchical naming system for computers and resources connected to the internet. Basically this is the Internet's equivalent of a phone book that lets you have name to number mappings on your computers. The name decel.ecel.uwa.edu.au is the number 130.95.4.2 and vice versa. This is achieved through the DNS. The DNS is a heirarchy...
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...Unit 10 Assignment 1: Video Summary 8 Video 2.04 chkdsk (Check Disk) Topics * Disk Options * Drive properties Terms * Cross-linked Files: FAT Files that point to the same cluster. Cross-linked files are created as the computer is improperly shut down or an application abnormally aborts. For this video it reminded me that chkdsk used to be scandisk. Video 2.01 Windows Update Topics * Security Center * Control panel access * Internet explorer access route Video 2.10 Support Tools Topic * The Dependency Walker Terms * Dependency walker: troubleshoots faulty applications. For this video, I have learned the name of the process I have used to repair applications. Video 2.15 DirectX Diagnostic tool Topics * Run line access point / run line command * System tools access point Terms * Dxdiag: DirectX multimedia program run code. Video 4.01 Comparing LAN’s and WAN’s Topics * Stand-alone computer * Peer-to-peer Network * Client server Terms * LAN: Local Area Network * WAN: Wide Area Network * Work group: A peer-to peer network and all network computers. * Domain: A type of client-server network that requires at least on server prompted to have the role of domain controller. In the Video 4.01, I learned that Local Area Networks cover a short distance, and that Wide Area Networks can cover...
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...Unit 8 Assignment:1 Written Reflection on Our Interview After conducting my interview, I can say that I walked away from this experience with many a lesson learned. The first lesson that I learned was that after choosing a person to interview, then asking that person, most will jump on the defensive and ask “about what”. This is due to the fact that most people are usually pressed for time. They initially want to know how long this process will take without ever stopping to realize that the length of most interviews is dependent upon how long it takes for the interviewee to answer the questions that are asked. Another reason is because most will be curious about the nature of the interview, meaning what questions will be asked. This response I received tells me that people in general do not like discussing certain subjects. Some of these subjects include race, religion, and politics. These two topics are considered to be in the “No Go Zone” of interviews based entirely on their nature to insight the greatest of arguments. Another lesson I learned while conducting my interview is that most people have never been interviewed in the first place. This fact will show when the person being interviewed starts to give one word answers to questions asked. This actually happened though I informed the person that the purpose for the interview I was conducting was to gain a better insight on the subject! Lastly, I learned that when conducting the...
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