...System administration By: MANUEL Y.R.C What entails to be a system administrator? * A system administrator (SA) is responsible for managing and maintaining a multiuser computing environment. * He /she looks after computers, networks, and the people who use them. * May look after hardware, operating systems, software, configurations, applications, or security. * A system administrator influences how effectively other people can or do use their computers and networks. SA responsibilities include: * Installing, maintaining and troubleshooting workstations, servers, OSs, software applications and other computing systems * Creating user accounts and assigning user permissions * Executing anti-virus mechanisms * Creating backup * Creating file systems * Monitoring network communication * Updating systems upon release of new OSs or software * Implementing computer, network and security policies for system and network users. * Light programming or scripting * User training and management * Hardware and software system security, such as protection against hardware theft and abuse, malware/spyware and unauthorized use of systems and components, including firewall and intrusion detection system maintenance (http://www.techopedia.com/definition/4815/system-administrator-sa Book:the practice of system and network administration second adition by:Tomas A,limoncile) Consequences of not doing your work as system administrator...
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...The iPhone Zachary Shook/Leo Schultz Carla Rogacs NT1110T Computer Structure and Logic (Tue) November 25, 2014 Almost every person you know has one, most of them are small, compact, has internet connection, high definition screen (HD), more than likely has a bunch of applications (Apps) downloaded to your home screen, a lot of people call it their Smartphone but the majority of individuals who have a Smartphone, have an iPhone. In the mid-2000s, Blackberry, Motorola, and Palm smartphones were dominating the cell phone industry, and then out of nowhere Apple introduced the world to the iPhone. The year was 2007, the late Steve Jobs the co-founder of Apple was getting ready to give one of his most incredible speeches of his life. He started by telling the audience he would be introducing a wide-screen iPod with touch screen controls, that was actually a mobile phone. The original iPhone had a 3.5 inch screen at 320 X480 and 163ppi, a quad-band 2G edge data radio, 802.1b.g Wi-Fi, Bluetooth 2.0 EDR, and a 2 megapixel camera. the iPhone was powered by an ARM-based Samsung 1176 Z-S processor and power VR MBX lite 3D graphics, 128 megabytes of random access memory(RAM), as well as four or eight gigabytes of NAND flash storage, and also could sync to iTunes. The iPhone software was very impressive, Apple used a full version of Safari, based on the exact same web kit HTML rendering engine that powered the desktop version on the Mac. Apple also created the best mobile...
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...which a dedicated channel (or circuit) is established for the duration of a transmission. The most ubiquitous circuit-switching network is the telephone system, which links together wire segments to create a single unbroken line for each telephone call. Packet switching: Refers to protocols in which messages are divided into packets before they are sent. Each packet is then transmitted individually and can even follow different routes to its destination. Leased line: A permanent telephone connection between two points set up by a telecommunications common carrier. Typically, leased lines are used by businesses to connect geographically distant offices. Time-division multiplexing: a type of multiplexing that combines data streams by assigning each stream a different time slot in a set. TDM repeatedly transmits a fixed sequence of time slots over a single transmission channel. T-carrier system: the name of the combination of different physical line standards(DSO, DSI, DS3 and others), plus circuits switches that use time division multiplexing (TDM) features, that together allowed the phone company to create digital circuits from end to end and create leased line services for customers. DSO: Digital Signal level 0. One of the physical line standards in the T-carrier system, as originally created by the companies of bell system in the united states. DSO runs at 64 Kbps DS1: same as above DS1 runs runs at 1.544 Mbps, with a...
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...Daniel Wang NT 2640 IP Address Class Historical Significance of the address classes: Class A: the first of the address classes, which is responsible for the value ranges of IP from 0-126 and also has 16,177,214 hosts. It also has 256 networks and the most significant bits are 0000. Class B: The second of the address classes, which is responsible for the value ranges of IP from 128-191. It also has 65,534 hosts and 65,536 networks. The most significant bits are 1000 and it is also a common class among most IP addresses. Class C: the third of the address classes, which is responsible for the value ranges of IP from 192-223 the most significant bits are 1100. It only has 254 hosts but it also has 16,177,216 networks since a lot of people have their IP addresses starting with 192.xxx.xxx.xx. Class D: the fourth of the address classes, which is responsible for the value ranges of IP from 224-239. Its most significant bits are 1110, and it does not have any networks or hosts because this class is rarely considered since the start of IP addresses don’t often start with 224 and above. Class E: the fifth of the address classes, which is responsible for the value ranges of IP from 240 and above. The significant bits of this class are 1111 and just as Class D does not have any hosts or networks, the same is with this class since IP addresses do not go above 192 usually. http://www.inetdaemon.com/tutorials/internet/ip/addresses/classful.shtml Address space A: the value range is...
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...team were tasked to define the overall company strategy, business goals and high level IT objectives. MDCM Inc. corporate strategy is to run the company under one single brand across all its subsidiaries geographically based. The company needs to boosts it profits by increasing productivity, to solve this requirement IT Systems and the implementation thereof needs to be addressed. This is due to current lack in forecasting, scheduling, inventory and supply chain problems. We need to match/ align the IT objectives with the company strategy. We wants to be a market leader in the medical product manufacturing industry and we want to increase our market share. We need to reduce internal costs by identifying functional areas where IT can be applied to assist in reducing costs, i.e. IT systems will replace some of the workforce. The risk here is that currently we have so many different / complex systems in place that that also leads to higher admin costs. Not all of the staff understands all the systems. This leads to previously mentioned lack in forecasting, scheduling, inventory and supply chain problems. If one overall system is put into place, the system will replace some staff members that is supposed to look after these tasks and thus increase efficiency. Sharing of information between various departments will improve the services offered to our customers and that would ensure we meet the customers’ requirements in a timely manner. This will also assist us to acquire...
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...for watching video? Can you identify any shortcomings of the device? 2. Compare the capabilities of the Kindle to the iPad. Which is a better device for reading books? Explain your answer. 3. Would you like to use an iPad or Kindle for the books you use in your college courses or read for pleasure instead of traditional print publications? Why or why not? II Porter’s competitive forces model helps companies develop competitive strategies using information systems. In this context answer the following questions: 1. Define Porter’s competitive forces model and explain how it works. 2. Describe what the competitive forces model explains about competitive advantage. 3. List and describe four competitive strategies enabled by information systems that firms can pursue. 4. Describe how information systems can support each of these competitive strategies and give examples. 5. Explain why aligning IT with business objectives is essential for strategic use of systems. III Discussion Questions 1. It has been said that there is no such thing as a sustainable competitive advantage. Do you agree? Why or why not? 2. It has been said that the advantage that leading-edge retailers such as Dell and Wal-Mart have over their competition isn’t technology; it’s their management. Do you agree? Why or why not? 3. What are some of the issues to consider in determining whether the Internet would provide your business with a...
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...Structural functional theory is when society is a complex system of interconnected and interrelated social structures each having a function and working together to promote social stability. One hundred million people shop at Wal-Mart every week. Wal-Mart is very convenient for people to shop at. Most people do not even have to shop at other stores because Wal-Mart has everything. It’s also convenient because it is right around the corner from a lot of customers houses; they don’t have to travel far to find a Wal-Mart store so they save gas. People already know that Wal-Mart has the lowest prices so they don’t have to search for stores with low prices. The items sold are good quality as well as cheap. What more could someone ask for. Wal-Mart is a world leader in logistics and promotes greater efficiency between its suppliers. Bob McAdam who is the Wal-Mart vice president states in the video, “We are raising the standard of living through lowering the cost of goods for people.” He is saying that Wal-Mart is good for Structural functional theory is when society is a complex system of interconnected and interrelated social structures each having a function and working together to promote social stability. One hundred million people shop at Wal-Mart every week. Wal-Mart is very convenient for people to shop at. Most people do not even have to shop at other stores because Wal-Mart has everything. It’s also convenient because it is right around the corner from a lot of customers houses;...
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...The systems approach Attempts to reconcile the classical approach (emphasised the technical requirements of the organisation and its needs) with the human relations approach (emphasised the psychological and social aspects, and the consideration of humans needs). The attention is focused on the total work organization and the interrelationship of structure and behavior, and the range of the variables within the organisation. The principal idea is that any part of an organisations activities affects all others parts. The business organisation is an open system, there is continual interaction with the broader external environment of which it is part. The systems approach views the organisation within its total environment and emphasies the importance of multiple channels of interaction. The systems approachs views the organisation as a whole and involves the study of the organisations in terms of the relationships between technical and social variables within the system. The contingency approach This approach explain that the most appropriate structure and system pf management is therefore dependent upon the contingencies of the situation for each particular organisation, this approach implies that the organisation theory shouldn’t seek to suggest one best way to structure or manage organisation but should provide insights into the situational and contextual factors which influence management decisions. Other approaches to the study of organisations: -The decision-making...
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...Chapter 1: Two Different Worldviews The Framework of Individual Psychology The Framework of Systemic Family Therapy Basic Concepts of Systems Theory and Cybernetics Family Therapy or Relationship Therapy? Summary Chapter 2: The Historical Perspective Planting the Seeds: The 1940s Cybernetics Development of Interdisciplinary Approaches Gregory Bateson Putting Down Roots: The 1950s Bateson (Continued) The Double-Bind Hypothesis Nathan Ackerman Murray Bowen Carl Whitaker Theodore Lidz Lyman Wynne Ivan Boszormenyi-Nagy John Elderkin Bell Christian F. Midelfort Overview of the 1950s The Plant Begins to Bud: The 1960s Paradigm Shift The MRI Salvador Minuchin Other Developments Blossom Time: The 1970s Psychodynamic Approaches Natural Systems Theory Experiential Approaches Structural Approaches Strategic Approaches Communication Approaches Behavioral Approaches Gregory Bateson Connecting and Integrating: The 1980s Other Voices The Limits of History Controversy, Conflict, and Beyond: The 1990s The Feminist Critique Family Therapy and Family Medicine Integration and Metaframeworks Managed Care The Twenty-First Century: Continuing Concerns and Emerging Trends Summary Chapter 3: The Paradigmatic Shift of Systems Theory A Cybernetic Epistemology Recursion Feedback Morphostasis/Morphogenesis Rules and Boundaries Openness/Closedness ...
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...first lectures of the course show an empirical and theoretical view of the major principles of the organizational design as well as the alternative design forms. The stakeholders, both insiders and outsiders, and their behavior or relations of cooperation and competition suppose an analysis need that provides them of a huge importance. I also realize about the importance of the agency theory and the problems and remedies caused, improving the importance of efficient corporate governance. This need of a good organization is solved by the systems theory, ”Organizations are systems of interdependent activities linking shifting coalitions of participants; the systems are embedded in – dependent on continuing exchange with and constituted by – the environments in which they operate”. (Scott, 1998:28). The systems which formed the organization have a common target and are classified in three levels based on their relevance. Both, stakeholders and systems, needs an analysis in order to get success in our procedures and adapt the venture structure to the different organizational designs provided in the lectures. After understanding these concepts, the lectures focused on the relation between the main management factors (Vision and mission) and the drivers analyzed, providing goals and strategies to the organization. As important as the creative process is the analysis to know the organizational boundaries, which let the organization look for available goals based on the efficiency and effectiveness...
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...for watching video? Can you identify any shortcomings of the device? 2. Compare the capabilities of the Kindle to the iPad. Which is a better device for reading books? Explain your answer. 3. Would you like to use an iPad or Kindle for the books you use in your college courses or read for pleasure instead of traditional print publications? Why or why not? II Porter’s competitive forces model helps companies develop competitive strategies using information systems. In this context answer the following questions: 1. Define Porter’s competitive forces model and explain how it works. 2. Describe what the competitive forces model explains about competitive advantage. 3. List and describe four competitive strategies enabled by information systems that firms can pursue. 4. Describe how information systems can support each of these competitive strategies and give examples. 5. Explain why aligning IT with business objectives is essential for strategic use of systems. III Discussion Questions 1. It has been said that there is no such thing as a sustainable competitive advantage. Do you agree? Why or why not? 2. It has been said that the advantage that leading-edge retailers such as Dell and Wal-Mart have over their competition isn’t technology; it’s their management. Do you agree? Why or why not? 3. What are some of the issues to consider in determining whether the Internet would provide your business with a...
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...Organizations as a system. A system is a whole made up of parts. Each part can affect the way other parts work and the way all parts work together will determine how well the system works. when can look at business organization as a system because it conforms to the system definition; it recognizes the interrelationships of people, processes, decisions and designs organizational structure in order to realize its projected economic goal. An organization with a good designed system will requires an understanding of how all the parts (for instance, HR department, production department, logistic department, finance department, sales department, marketing department, IT department …etc) fit together as a whole, an intimate understanding of the parts themselves for a better understanding of endogenous event and a full awareness of the organization’s environment including the other external systems to which it is connected to better prepare for exogenous changes. Some hypothetical problems that disrupt the balance of the an organization would be a coordination or communication issue between departments, for instance HR department not selecting adequate candidate for a specific job skill because it did not have all relevant information about the job, or for instance marketing department lunches a new product without integrating logistic department in the project which may cause delays of production and order fulfillment issues. Another issue that may disrupt the balance of the system is exogenous...
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...PubMed Abstract: Retroviral capsid proteins are conserved structurally but assemble into different morphologies. The mature human immunodeficiency virus-1 (HIV-1) capsid is best described by a 'fullerene cone' model, in which hexamers of the capsid protein are linked to form a hexagonal surface lattice that is closed by incorporating 12 capsid-protein pentamers. HIV-1 capsid protein contains an amino-terminal domain (NTD) comprising seven α-helices and a β-hairpin, a carboxy-terminal domain (CTD) comprising four α-helices, and a flexible linker with a 310-helix connecting the two structural domains. Structures of the capsid-protein assembly units have been determined by X-ray crystallography; however, structural information regarding the assembled capsid and the contacts between the assembly units is incomplete. Here we report the cryo-electron microscopy structure of a tubular HIV-1 capsid-protein assembly at 8 Å resolution and the three-dimensional structure of a native HIV-1 core by cryo-electron tomography. The structure of the tubular assembly shows, at the three-fold interface, a three-helix bundle with critical hydrophobic interactions. Mutagenesis studies confirm that hydrophobic residues in the centre of the three-helix bundle are crucial for capsid assembly and stability, and for viral infectivity. The cryo-electron-microscopy structures enable modelling by large-scale molecular dynamics simulation, resulting in all-atom models for the hexamer-of-hexamer and pentamer-of-hexamer...
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...Manager, Telecoms & Broadcast Services * Managing existing clientele and building new potential customers in the assigned territory * Responsible for developing, positioning and selling the broadcast service across the region * Continually building and improving the broadband, multimedia and broadcast services thru innovative pre-sales and marketing activities. * Working closely with engineering and product team to improve delivery of Speedcast products and services. MEASAT Satellite Systems – Assistant Manager, Ground Engineering * To co-ordinate, monitor and perform all ground systems equipment and VAS maintenance and operations; * To perform anomaly / fault investigation and produce appropriate documentation / technical reports as directed; * To develop new testing procedure and suggest procedure enhancement for increase operating efficiency; * To participate in the procuring, commissioning and testing of new earth station or VAS systems. Be part of the...
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...well: This chapter involves review of previous studies and researches carried out which were found to be related to this presently. Detailed review of literature was carried out to cover the following study areas as shown: - Organizations - Management - Motivation (Reward) and its theories - Relevance of motivation (reward) on productivity. 2.2 ORGANIZATION Organization can be defined as two or more people who work together in structured way achieve a specific goal or goals. Organization can be defined form diverse perspectives. According to Scott (1981) these are there perspective for defining organization these are: 1. Organization as rational systems. 2. Organization as natural systems. 3. Organizations an open system. Organization as Rational Systems: The definition of Organizations as a rational system emphasizes two major characteristic of Organizations. a. Specification of goals b. Formalization of structure. According or Barnard (1938) “formal Organization is that kind of cooperation concision of men that are conscious l deliberate and purposeful Scott (1981). Defines an Organization as a collectively oriented to the pursuit of relatively specific goals an exhibiting a relatively highly formalized social...
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