The System Level And The Programmer Level Information Technology Essay

The System Level And The Programmer Level Information Technology Essay Probably not, since any protection scheme devised by a human can also be broken and the more complex the scheme is, the more difficult it is to be confident of its correct implementation. As compared to dedicated machines, time-shared machines are far less secure, and are very easy to overload the buffers. They are also much slower to catch a virus. But in dedicated machine, all resources are available to the process being run. Q2) Under what circumstances would a user be better off using a time sharing system rather than a PC or single user workstation? Ans . When there are few other users, the task is large, and the hardware is fast, time-sharing makes sense. The full power of the system can be brought to bear on the users problem. The problem can be solved faster than on a personal computer. Another case occurs when lots of other users need resources at the same time. A personal computer is best when the job is small enough to be executed reasonably on it and when performance is sufficient to execute the program to the users satisfaction. Q3) In the designing of the operating system there are two approaches modular kernel and layered approach? How are they different? Ans. There are various differences between moduler kernel and layered approach:- A modular kernel differs from a layered approach in that there is less overhead in making a call to a lower level part of the kernel. The call doesnt have to jump through numerous layers before work gets done and parts are aware of any other parts of the kernel and not just what is below them. Modular kernel is more secure as compared to layered approach, as more operations are done in user mode than in kernel mode. Debugging and modification of data is much easier in layered approach because changes affect only limited sections of the system rather than touching all sections of the system. In modular kernel approach, kernel design and its functionality are more simple as compared to layered approach. Part B Q4) There is guest operating system and a host operating system like VMware? List all the factors in choosing the host operating system? Ans. A host operating system is the operating system that is in direct communication with the hardware. It has direct hardware access to kernel mode and all of the devices on the physical machine. The guest operating system runs on top of a virtualization layer and all of the physical devices are virtualized. A host operating system should be as modular and thin as possible to allow the virtualization of the hardware to be as close to the physical hardware as possible, and so that dependencies that exist in the host operating dont restrict operation in the guest operating system. Q5) The kernel is responsible for a action with the processes. Search through the action of kernel and describe what is the action? Ans. The various actions of the kernel are as follows: The main task of a kernel is to allow the execution of applications and support them with features such as hardware abstractions. To run an application, a kernel typically sets up an  address space  for the application, loads the file containing the applications code into memory, sets up a  stack  for the program and branches to a given location inside the program, thus starting its execution. The kernel uses  scheduling algorithms  to determine which process is running next and how much time it will be given. The algorithm chosen may allow for some processes to have higher priority than others. To perform useful functions, processes need access to the  peripherals  connected to the computer, which are controlled by the kernel through  device drivers. If sometimes the interrupt has been occurred during execution of any process then it saves the state(address) of current process, and after that when interrupt has been removed then it restores the state(address) of previous process. Q6) Considering both the system level and the programmer level. Consider the advantage and disadvantage of the following structure. Synchronous and asynchronous communication. Automatic and explicit buffering. Send by copy and send by reference Fixed-sized and variable-sized message. Ans: Synchronous and asynchronous communication- synchronous communication: Advantage:   you can get an immediate response; instant feedback fosters communication; there seems to be a more emotional bonding effect between people when there is a possiblity to communicate in real time (synchronously), spontaneity. Disadvantage: There is less time to think about what you want to say or your response to another; time may be a limiting factor, e.g time zones; synchronous communication over the computer may be difficult because of the speed of data transaction with slower connections; you need extra equipment (speakers, microphone, webcamera). asynchronous communication: Advantage: you have time to think about what you want to say; time is not a constraint. You can receive the message whenever you have time and you can analyze the content of the message more carefully so the answer you give can be even more meaningful because it has gone through a process of elaboration. Disadvantage: no immediate response, especially where time is significant; you may not know if the other person has received your message; the message loses human contact . Automatic and explicit buffering Automatic buffering : Advantage: Automatic buffering provides a queue with inde ¬Ã‚ nite length ; thus ensuring the sender will never have to block while waiting to copy a message. Disadvantage: There are no specifications how automatic buffering will be provided; one scheme may reserve sufficiently large memory where much of the memory is wasted. Explicit buffering: Advantage: Explicit buffering speci ¬Ã‚ es how large the bufferis. Disadvantage: In this situation, the sender may be blocked while waiting for available space in the queue. However, it is less likely memory will be wasted with explicit buffering. Send by copy and send by reference Send by copy: Advantage: send by copy is better for synchronization issues. Disadvantage: Send by copy does not allow the receiver to alter the state of parameter. send by reference: Advantage: A bene ¬Ã‚ t of send by reference is that it allows the programmer to write a distributed version of a centralized application Javas RMI provides both, however passing a parameter by reference requires declaring the parameter as a remote object as well. Send by reference also allow the receiver to alter the state of parameter. Disadvantage: send by reference can compromise the security of an organisation because sensitive information can be easily distributed accidently or deliberately. Fixed-sized and variable-sized messages Fixed-sized messages: Advantage: The implications of this are mostly related to buffering issues; with  ¬Ã‚ xed-size messages, a buffer with a speci ¬Ã‚ c size can hold a known number of messages. Disadvantage: with  ¬Ã‚ xed-sized messages the messages are copied from the address space of the sender to the address space of the receiving process. Variable-sized messages: Advantage: variable-sized messages (i.e. Larger messages) use shared memory to pass the message. Disadvantage: The number of variable-sized messages that can be held by such a buffer is unknown.

Essay --

In the 1990s, sexuality inculcation in the Coalesced States took a behavioral focus with two distinctive and widely disunited approaches. The first abstinence-until-espousement, limits ordinant dictation to why adolescent people should not have sex until they are espoused. The second, balanced and authentic sexuality edification inspirits students to defer sex until they are older and to practice safer sex when they become sexually active. Studies of sexuality edification in the Coalesced States show that most frequently edified subjects include factual information about magnification and development, reproductive systems, dating and setting limits, abstinence and refusal skills, pregnancy and parenting, and STDs, including HIV (CSC, 2011 ). While extemporaneous pregnancies among teens in the U.S. is at the lowest rate in years, American teenagers are still getting pregnant at a much higher rate than their counterparts in other developed countries – 3x more often than teens in Germany and France, and 4x more often than teens in the Netherlands. In 2010, extemporaneous pregnancies among U.S. teens dropped to 34.3 births per 1,000 girls aged 15-19 according to the most recent health statistics. That’s great news, but it’s still the highest teen pregnancy rate among developed nations. A report relinquished last month by The Centers for Disease Control and Obviation (CDC) surveyed 5,000 girls in 19 states who became pregnant unintentionally and gave birth between 2004 and 2008. 50% of these girls did not utilize birth control and one third of these girls didn’t cerebrate they could get pregnant. As the article A moiety of Teen Moms Don’t Use Birth Control – Why thatâ€℠¢s no surprise in Time Magazine (2012) points out, w... ...n mothers account for 11% of all births in the US. Out of all teen pregnancies, 57% end in birth. Another 14% end in miscarriage. Proximately a third of pregnant teenagers cull abortion. Out of all teenage pregnancies, 29% are terminated by abortion. Ebony teens have the highest teen pregnancy rate. For puerile women age 15-19, ebony teens are most liable to become pregnant (134 per 1,000 women). Scarcely lower rates occur among Hispanics (131 per 1,000) followed by non-Hispanic whites (48 per 1,000). The teen pregnancy rate reached an all-time high in 1990 with an estimated 116.9 per thousand and an all-time high birth rate of 61.8 births per thousand in 1991. By 2002, the pregnancy rate had dropped to 75.4 per thousand - a decline of 36%. However, a December 2007 report by the Centers for Disease Control shows a 3% increase in teenage pregnancy from 2005 to 2006.

Identifying Carbohydrates Lab Report

(insert name here) (insert period #) Identifying Carbohydrates (First inital and last name of lab partner) Purpose The purpose of this lab is to learn how to identify different forms of carbohydrates by conducting the Benedict and Iodine test. Theory The theory for this concept is that if in the benedicts test the carbohydrate reacts, it is a monosaccharide. If it reacts in the Iodine test it is a polysaccharide. If no reaction occurs in either test the carbohydrate is a disaccharide. Data Type of carbohydrate| Benedicts Test| Iodine Test|Monosaccharide| R| NR| Disaccharide| NR| NR| Polysaccharide| NR| R| Solution| Bendicts Test| Iodine Test| Honey| R| NR| Oats| NR| R| Table Sugar| NR| NR| Apple Juice| R| NR| Powdered Sugar| NR| NR| Results Solution| Type of carbohydrate| Honey| Monosaccharide| Oats| Polysaccharide| Table Sugar| Disaccharide| Apple juice| Monosaccharide| Powdered Sugar| Disaccharide| Conclusion I found that honey reacted with the Benedicts test, so it must be a monos accharide. Oats did not react with the Benedicts test, but did react ith the Iodine test; so it is a polysaccharide. Both the table sugar and the powdered sugar reacted with neither tests, so they are both disaccharides. Lastly, the apple juice reacted with the Benedicts test so it is a monosaccharide. Questions 1) It could be a Polysaccharide or a Disaccharide. 2) It could be a Disaccharide or a Monosaccharide. 3) This would be a monosaccharide. 4) This would be a Disaccharide. 5) They originally came from producers. 6) The chemical formula is Cx(H2Oy) 7) 8)C12 H22 O11

X essays

X essays Often people feel threatened by things they cant place a label on. I believe its just human nature to view something, and then try to associate or place a label on it. This is very evident in the story of X. This is definitely, a story written to influence the readers behavior. The bold X in the authors writing is a deliberate attempt to confuse the reader. The X is in contrast to the rest of the article. Although the story of X contains a message of acceptance, it also contains connotations that, its not ok to be part of the norm. The beginning of the story opens with the scientist, a permanent group, trying to find the right parents to raise baby X. To qualify as the parents, they would have to basically disregard all the norms and roles that is attributed to families, primary group, of today. When a newborn is brought home in society, its customary for the husband to pass out blue cigars for a boy and pink for a girl. (a type of symbol to communicate gender) In the case of X, when they arrived at home, the friends and relatives, primary formal and informal groups, didnt know how to react when the Joneses told them X wasnt a boy or a girl, but an X! The friends and relatives were displaying an authoritarian personality. They couldnt say look at her cute little dimples or look at his husky little biceps, stereotypes. At the same time, the Joneses were displaying a Machiavellian personality, by not telling them what baby X was. They were trying to manipulate the family and friends behavior. The scientist also displayed a Machiavellian personality. By doing this, there is a definite role conflict for the parents. Family and friends were put off and confused by their inability to label X, a boy or girl. As X was growing up, the parents had to go against the norms. When raising X, they bounced it and hugged it allot. They came into rol...

Safeguarding Essay Example

Safeguarding Essay Example Safeguarding Essay Safeguarding Essay This could be because of mental or physical health issues. G. Neglect by others- This is a failure to meet a person care needs by another person. 2. Identify the signs and/or symptoms associated with each type of abuse (1. 1. ) Physical- Bruising thats odd shaped, burns, marks on the skins, broken bones, unexplained falls. Sexual- Anxiety, fear of contact, bleeding, infection in genital area, bursitiss , crying unexplained, withdrawal, torn clothes, self harming and neglect. Emotive/physical- Change in sleep Patten , nightmares, seeking behavior, self isolation, loss or gain weight, sadness, crying depression, low self esteem lack of self confidence. Financial- Unexplained bills to pay, over spending money not explain, no food in house, big withdrawals from the account, money missing pressure to change the ill. Institutional- rigid runtimes, lack of choice, cultural need religious needs not met, restrict to food,drink , having baths. Self neglect- Personal hygiene, not taking care of medical needs, not eating, misuse of drugs and alcohol. Neglect by others- Denial of care and rights, choices, with holding medication, falling to meet a persons needs i. E social, cultural needs not providing food and drink. Failure of duty of care. 3. Describe factors that may contribute to an individual being more vulnerable to abuse (1. 1. 3) Factors of contribute to the individual being more alienable to abuse are related to the individual and to there situation for expand ; they may depend on social support was stop this can leave the infinitival more vulnerable to abuse as may become insolate. If an individual was having communication problems like speech or hearing and all support was Stop because Of the career could make them isolated witch can make the situation be high stress level ,a lack of support given to care giver of if they have physical or mental health issues or staff shortages. 4. Explain the actions to take if there are suspicions that an individual is being abused (2. . 1) If you suspect someone is being abuse at your work place you should follow your policy and procedure. You need to report it to the team leader or manger or talk to someone you trust while maintain confidentiality. By doing this your be keeping the person safe. Maintain duty of care. Make sure you have all the facts and that they are right but if you are in any adult always report it to the manger. Follow up about the situation and that it has been recorded. Safety is everyone responsibility doing nothing is unsafe practice. 5. Explain the actions to take if an individual alleges that they are being bused (2. 2. 2) If an individual tessellates that they are being abuse you should follow procedure and take the person seriously. Take them some where safe and private. Keep them calm and try to look normal and not angry listen to them. Respect what they would like to do. Reassure them and give them your support make sure you let them know what they are area what your going to do to help them make sure you record and let them know there not to blame and erasure them. Try not to put them in anymore danger ask questions that leading you may have to ask that they may not like-Make urea you disuses the situation with the people who need to be informed. 6. Identify ways to ensure that evidence of abuse is preserved (2. 2. ) The Fri. part of duty of care will be to alleged victim take steps to pressure any evidence. Where a criminal offence may of took place-Do not move or remove anything or touch. Dont clean or tidy up or let anyone who not evolved in the area. When talking to the person recorded any visible signs such as bruising, torn clothing, signs Of distress. Handle anything with care try not to touch mach as it may be used as evidence keep the per son warm as they maybe In stock. . Identify national policies and local systems that relate to safeguarding and protection from abuse (3. 3. ) Policies -? Legal powers to intervene humans right at 1 998 Mental capacity act 2005 Safeguarding vulnerable group act 2006 Health and social care act 2008 Has act, regulation 2010, ICQ regulation 2009 8. Explain the roles of different agencies in safeguarding and protecting individuals from abuse (3. 3. 2) Local authority adult social care Services they receive safeguarding alerts make sure action is taken to keep persona. Give information and advice. Arrange meeting and case conference. Represented at police interviews. All agencies. E police, INS, Gasp, Medical services etc. They implement and work to the safeguarding adults policies and procedures. They ensure staff are aware of signs and symptoms on abuse and getting training on the safeguarding adult and policies and procedures. They ensure staff are aware are area of signs and symptoms of abuse and getting training on the safeguarding police reporting and recording procedures they also require by law CURB checked. Police are to investigate allegation of abuse gather evidence and protect people in situation. Medical services provide retirement if required understate an investigation or medical examination if required. . Identify reports into serious failures to protect individuals from abuse.

Netflicks case Study Example | Topics and Well Written Essays - 750 words

Netflicks - Case Study Example Netflix strategies To remain in the market as the most online subscriber of movies in United States, Netflix had to employ unique strategies since competition was high. One of strategies that the firm had emulate in order to remain an ever-growing subscriber of online movies was provision of large scope selection of DVDs titles to it customers (Emerson 79). This meant that a lot of DVDs were available to the subscribers. Secondly, the firm aimed at acquiring new content by building and maintaining mutually beneficial relationships with entertainment video providers. Thirdly, Netflix provides enjoyable movies to the subscribers and making sure the subscribers are the one to choose from a list of movies. The fourth strategy that they use to remain in the market is giving the subscribers time to watch streaming content or receiving quickly delivered DVDs via the mail. Additionally, the company spends a lot of funds in marketing to attract more customers while still making sure that thei r brands and services are available in all major markets. Ethics and social responsibility of Netflix One of the ethical issues of Netflix is to provide online streaming of videos to individuals that are not pirated (Peter 23). Netflix aim is to revolutionize the way many people rented movies and introduce streaming of movies via online. One of social responsibility that the firm had to provide to the subscribers was to make sure that movies were readily available to them (Vitorovich 36). Through maintenance of strong relationship among the employees and ensuring their safety in the work place, the firm has afforded to outdo their rivals like Blockbusters who were engaging them to stiff competition (Den and Koopman 35). In addition, Netflix focuses at shipping about 2 million DVDs on average to daily subscribers and this goal is almost to be achieved since they had been able to get 61% of company’s subscribers who were watching movies on TV episodes. Marketing and promotions Netflix uses different marketing strategies to attract subscribers including banners, text on popular sites that a lot of people were associated with like yahoo, radio stations, regional and national television. These marketing strategies are able to get 194 millions visitors annually; this was five times the number of blockbuster customers (Janko 56). Discounts to subscribers who were active in online purchase were given, this motivated the subscribers. Netflix Company was able to advertise programs to studios and in return they got cash considerations from the studios (Chavez 70). Free movies were offered during advertisement to make sure that the brands were accepted in the market. Advertisement expenses were $205.9 million in 2009, $181.4 million in 2008, and $207.9 million in 2007. Due to the company culture of marketing and promotions, it has emerged as a top performer in the online marketing (Kolb 45). Finance and accounting Netflix revenues grew from $500 millions in 2004 to 1.2 billions. Later in 2010, the figure rose to $2.1 billions comparing with their rivals who showed sharp decline of$569 million loss in revenue (Stelter 61). In 2010, Netflix boards of directors authorized expenditure of up to $300 millions to purchase share of common stock. Netflix recorded a profit of US $6.5 millions and revenue of $272 millions Human resource of Netflix Netflix is run by a group of

Elecitation and pretexting Essay Example | Topics and Well Written Essays - 250 words

Elecitation and pretexting - Essay Example It is the use of publicly available information to in order to creates ones new identity and using it to acquire information needed to convince their target to take a specific action. The tools of social engineering can be used to detect criminal activities by tracing the conversations of the suspects before they engage in attacks. Elicitation has aided in the fight against global challenges such as terrorism through the tracking of conversations using modern communication gadgets. It can be used to get some vital information that may lead to the hideouts of criminals. The tool is used by politicians and other leaders to make inroads into the camps of opponents for safeguarding the nation. Pretexting can be used to gain vital information on the operations of illegal business ventures and bringing them to the public for legal measures to be undertaken. Intelligence services adopt the use of elicitation to track down hackers who use similar techniques in propagating criminal activities (Hadnagy,