The Main Types of Chemical Bonds

The Main Types of Chemical Bonds Atoms are the basic building blocks of all types of matter. Atoms link to other atoms through chemicals bonds resulting from the strong attractive forces that exist between the atoms. A chemical bond is a region that forms when electrons from different atoms interact with each other. The electrons that participate in chemical bonds are the valence electrons, which are the electrons found in an atoms outermost shell. When two atoms approach each other these outer electrons interact. Electrons repel each other, yet they are attracted to the protons within atoms. The interplay of forces results in some atoms forming bonds with each other and sticking together. Main Types of Chemical Bonds The two main types of bonds formed between atoms are ionic bonds and covalent bonds. An ionic bond is formed when one atom accepts or donates one or more of its valence electrons to another atom. A covalent bond is formed when atoms share valence electrons. The atoms do not always share the electrons equally, so a polar covalent bond may be the result. When electrons are shared by two metallic atoms a metallic bond may be formed. In a covalent bond, electrons are shared between two atoms. The electrons that participate in metallic bonds may be shared between any of the metal atoms in the region. Predict Type of Chemical Bond Based on Electronegativity If the electronegativity values of two atoms are similar: Metallic bonds form between two metal atoms.Covalent bonds form between two non-metal atoms. Nonpolar covalent bonds form when the electronegativity values are very similar, while polar covalent bonds form when the electronegativity values are a little further apart. If the electronegativity values of two atoms are different, ionic bonds are formed.

Competitive Environment Questions Essay Example | Topics and Well Written Essays - 1250 words

Competitive Environment Questions - Essay Example It takes place in imperfect market and monopoly market is a perfect example which provides restraints towards entry. There are no barriers to entry in a perfectly competitive market where the firms are price takers and have no power of price making behavior. Barriers to entry may be structural, legal or strategic (Besanko, et al, -2010, p. 473). Structural barriers affect the decisions associated with the cost and demand of the firms and it may occur due to economies of scale and network effects. Legal barriers from its name can be said to be barriers like patents, license etc from the ruling body. In case of strategic barriers, it includes various decisions made by the firms in restricting the entry of other firms with application of methods like innovative dealing arrangements, first mover advantage, and unique advertising and product differentiation techniques and so on (Competition and Barriers to Entry, 2007, p.3). 1 (b) Comment generally on the impact of ‘the Internetâ₠¬â„¢ on such barriers Internet auction market is an example of structural barriers to entry. The concept of positive network externality plays an important role in this case. The concept of positive network externality states that when a firm’s product is more attractive to a given customer base then more of the product is used by other consumers. Recent eBay. Com has emerged as one of the internet auction leader and its huge database offers the customers a wide array of products to be purchased at a time. The huge volume of transactions on this particular website is a typical example of barriers to entry towards other internet auction companies as in case of eBay they make huge money through the basis of commissions on transactions. Now a newcomer will have to either huge money which will not cover his cost or it will not be attractive as eBay because it already has a great market reputation and mammoth customer base (Besanko, et al, -2010, p. 473).The concept of strategic b arriers to entry is also associated with the structural barrier concept as the various companies through innovative production differentiation techniques like innovative advertisement, promotions, lucrative offer also try to capture markets as for example jabong.com, flipkart.com, snap deal.com and holds parity with the assumptions of monopolistic competition. In case of the airlines industry, with the use of internet has helped various travel agents reap a huge benefit through third party transactions on commission basis which affects the traditional travel agencies. Thus legal barriers are sometimes imposed (Dembrower & Grenblad, 2003, p. 3). 2. Explain and give examples of ‘collusive behaviour’, which is common in ‘Oligopolistic’ markets, AND identify the conditions necessary for ‘collusive agreements’ to survive in the long term. In oligopolistic markets various players cater to the same industry as for example in the soft drinks market two dominant players are Coca Cola and Pepsi. They formulate and implement optimal strategies against their rivals in order to make them worse off by calculating on their respective reaction functions (Bertrand game). Thus the

STUXNET Research Paper Example | Topics and Well Written Essays - 1250 words

STUXNET - Research Paper Example As the engineer hooked the computer to the Internet, the worm spread far and wide. How the Stuxnet Worm Spread The Stuxnet worm started to spread in March 2010, but it took its first variant about three months from then to appear. As people learnt about the existence of the worm on 15 July 2010, the servers for two mailing lists were attacked with the distributed denial-of-service on the industrial-systems security. Although at that time, the source of attack could not be worked out, yet it was suspected to be the Stuxnet worm. As a result of the attack, one of the two mailing lists got disabled, thus interrupting a very important informative source for the factories and the power plants. Two more variants of the Stuxnet worm surfaced; the first in March 2010 and the second in April 2010. In the authors’ opinion, the second and substantially improved variant showed up because of slow progression of the Stuxnet worm. The third variant that surfaced in April 2010 had only minor improvements. There is a build time-stamp in thee worm that starts from 3 February 2010. According to the report delivered by the Sky News on 25 November 2010 in the United Kingdom, an anonymous source whose IT security organization was also unidentified sent the news to Sky News that the black market had received a variation of the Stuxnet worm, but there was lack of consensus among the security experts over this matter. How the Stuxnet Worm Works Stuxnet makes use of vulnerability just like Windows uses the shortcut files to expand to new systems. The Stuxnet worm’s design was bottom-up so that it could effectively attack the systems implemented for the management of industrial networks like chemical manufacturing facilities and power plants as well as the systems of Supervisory Control and Data Acquisition (SCADA). In the start, the Stuxnet worm was thought to progress through such removable drives as USB sticks. However, about two weeks after the Stuxnet worm was first id entified, researchers of the Kaspersky Lab working in Moscow found that an unknown security flaw in the sharing of printer resources by the Windows could also help the Stuxnet worm spread. Microsoft found a way to fix this vulnerability with MS10-061 which varies in risk from one type of windows to another. â€Å"At least one aspect of what Stuxnet does is to take control of the process and to be able to do†¦whatever the author or programmer wants it to do. This has potentially devastating consequences, and there needs to be a lot more attention focused on it† (Weiss cited in â€Å"‘Stuxnet’ Worm Far†). The Target of the Stuxnet Worm The main target of the Stuxnet worm is the Siemens software. One trait that distinguishes the Stuxnet worm from most viruses that have been identified to date is that it remains silent till the time the worm locates Siemens software in the Windows system. Once the Siemens software is found, the Stuxnet worm exploits up to four 0-day attacks. The Stuxnet worm infected the SCADA systems in 14 functional plants of Siemens, though the infections could not hold the infected plants’ productions. According to the IDG News reports, the Stuxnet worm has infected systems at the Siemens plants in North America, Korea, and the UK, while the maximum infections have so far been made in the plants operating in

Media Convergence Essay Example | Topics and Well Written Essays - 1500 words

Media Convergence - Essay Example Or as Jenkins (2006) states, there is a cooperation between all multiple media industries, and media audiences will look for information where they can find it. This essay will look at convergence and what is meant by it, and will look, briefly, at the dangers of convergence, then will examine the Astral-Bell merger and analyze the merger from the voices of the people and the voices of the individuals who are behind the merger. Media Convergence According to Jenkins (2004) there is an inherent danger in media convergence, in that the multinational media conglomerates have the potential, and live up to this potential, to dominate every sector of the entertainment industry. Thus, the power elite had the potential to rule the airwaves, putting out its message to the masses, and the message is the message that benefits the corporations and the powerful (Brenkman, 1979). The media may be associated with large structural forces (Havens, et al., 2009). And the message may become more like p ropaganda, which makes the mass media more of a propaganda machine than a marketplace for free ideas (Murray, 2005). Giroux (2004) states that one of the dangers of media convergence, when certain corporations become too powerful, is that the message that goes out to the people is the message that benefits the corporations that own these multi-media conglomerates, which is the message of the neo-liberal – low taxes, deregulation and private enterprise is good, the opposite is bad, and an unequal distribution of wealth in society is a good thing. This is because the corporations that own these conglomerates are the very corporations that would benefit the most in this kind of society of profit above all else. Media convergence has the power to do the bidding of powerful people (Rossman, 2004), such as when Clear Channel, which is a multimedia conglomerate based in the United States, organized a boycott against the country group The Dixie Chicks, after the lead singer, Natalie Maines, told a crowd that she was embarrassed to be from the same state as George W. Bush, and Clear Channel, wanting to get favorable legislation for its plans to expand, organized the boycott to please the Bush Administration. In short, media convergence has the potential for great harm. Too much power in any one hands would cause the marketplace of ideas to falter, and the message that is disseminated will be the message that is crafted by this particular entity. It is in this context that the merger between Bell and Astral will be examined. The Bell-Astral Merger The View of the People According to Winseck (2012), the Bell-Astral merger refer to the fact that Bell is attempting to buy Astral media, and this would represent a major deal between the largest Telecom-Media-Internet conglomerate in the country, and they would have revenues of over $22 billion. Winseck (2012) states that the merger would mean that the country would have lost an independent station, which is what Astra l is, having revenues of just over $888 million in 2010. Winseck (2012) looks at this in the context of the Ronald Coase, economist, idea that the two ways of dealing with business environment uncertainties are the market and the hierarchies, and that the Bell-Astral merger would be essentially elevating the hierarchies over the markets. If the merger goes through, according to Winsec

Crimonology Essay Example | Topics and Well Written Essays - 750 words

Crimonology - Essay Example Biological influences on white collar crime are evident in sex differences between males and females. Sex of a person makes it possible to experience various life consequences. The belief that females, who are supposedly physically more weak, are mistreated more often is also inaccurate. Aside from rape, the only individual crime for which women are victimized more than men is robbery with contact. Men are twice as likely to be the victim of an assault or a robbery and 50 percent more likely to experience some crime of theft. Men are also the victims of strangers more than females (Friedrichs, 2006). Therefore, the idea that physically weaker people constantly fall prey to the criminal has no foundation in fact. Neither females nor older people are particularly prone to white collar crime. But, the lifestyles of these community groups may explain this fact better than their actual vulnerability to criminals. The advantage of this theory is that it explains roots of white collar crime , thus it does not take into account motivational factors and personal intentions of a criminal. Human biology and genetics are the two personal attributes most closely tied to antisocial behavior. Heredity and race are also related. ... ore frequently victims of white collar crime than others, while whites experience property crimes at higher rates than other ethnic and racial groups. For white collar crime, robbery accounts for the higher rate experienced by blacks (Friedrichs, 2006). It is still difficult to define the motivations of women when they commit their white-collar crimes at the workplace. But I am personally apt to think that if women have obtained such top positions at their companies - white-collar positions, they can hardly commit their crimes being motivated by poverty (according to economic marginalization thesis). Women rather try to cash in, in different ways, on their top-level positions. Thus, here opportunity thesis and sometimes, masculinity thesis can be more applicable in order to explain the motivation. As well, criminological theory states that opportunity is a more intense motivation for committing white-collar crimes. According to this theory, people who have achieved a lot on their liv es and have satisfied their needs as a result will need more goods to exchange with others, but not to use. Thus, this need for more possessions (or greed) can make people break the law and perpetrate crimes to receive what they want. Psychological predisposition may lead to antisocial inclinations and increase a possibility of criminal behavior patterns. The cultural ties associated with family income, race, and ethnicity also affect with whom one associates and the places of those associations. Housing, transportation, privacy, and leisure-time factors are related to income as well as to racial and ethnic segregation (Sutherland and Cressey 2001). To the extent that white collar crime varies according to place and event, individuals from different income levels and racial and ethnic

Effects of flicker on reading comfort (part 2) Essay

Effects of flicker on reading comfort (part 2) - Essay Example Two types of questionnaire, an initial questionnaire to identify the previous experience of discomfort and a symptom questionnaire were used. Results: The results indicated insignificant difference between discomforts caused by sustained reading and using computer. The condition of 50 Hz induced the greatest impact on reading comfort compared to DC. The most affected symptoms of discomfort were vision discomfort followed by eyestrain, blurred vision and headache. The mean difference of 75 Hz, 100 Hz and 140 Hz compared to DC lighting situation was not significant. Conclusion: The study shows that reading under 100 Hz LEDs light has no different effects on comfort than reading under LEDs light powered on DC. In addition, the study shows insignificant difference between discomfort induced by reading and by computer use in terms of incidence and nature. Further studies are required with larger and balanced sample size, different direction of illumination and longer period of reading tim e to address the possible limitations of this experiment. Methods Participants Students of the University of New South Wales (UNSW) were invited by posters and emails to participate in the experiment. Participants who completed the experiment received a nominal reward. The inclusion criteria were good binocular vision, lack of ocular and systemic abnormalities that possibly influence reading ability, and age had to be between 19 to 30 years old since light sensitivity often higher at this age group. The exclusion criteria were any known case of migraine or photosensitive epilepsy. A total number of 18 students were recruited (2 male and 16 female), all signed an informed consent form prior commencing the study. Ethics and the study protocol were reviewed and approved by the UNSW Human Research Ethics Advisory (UNSW HREA) Panel. Design and Procedure In a double masked randomized crossover study, discomfort symptoms were self-reported by using two types of questionnaires; an initial q uestionnaire and symptoms questionnaire. The participants had to attend five reading sessions under LED light, but with different rate of flicker in each session. They were randomly assigned to the sessions by Latin squares, and the reading sessions had to be separated by at least one day. At the beginning of the first session, the initial questionnaire had to be completed, whereas symptom questionnaire had to be filled immediately at the beginning and at the end of every session to evaluate reading discomfort. During the reading sessions, the ambient light was turned off, and the room was completely dark, so the only light source was that installed in lighting booth. The booth was positioned on a table, and a â€Å"twilight† novel was placed inside the booth directly under the light. Each subject had to read a part from the book on every session for 30 minutes with the habitual glasses. Comfortable sitting was enhanced by providing an adjustable chair placed in front of the booth to read with habitual reading posture. Questionnaires Two types of questionnaires were used in the study: the initial questionnaire and the symptom questionnaire. The initial questionnaire was designed to examine the previous experience of discomfort related to reading and computer use and to detect unknown cases of photosensitive epilepsy or migraine. The first part of the questionnaire was

The Simpsons as a typical sitcom Essay Example for Free

The Simpsons as a typical sitcom Essay Evaluate the extent to which The Simpsons follow the conventions of a typical sitcom. Refer to a specific episode that you have watched to support your evaluation. The Simpsons confirm to some stereotypical sitcom genre stereotypes, but ultimately subvert them by proving to dysfunctional. A sitcom is a 30 minutes programme, which contains humour and different types of comedy. In this essay, I will evaluate the extant to which the episodes The Simpsons roasting on an open fire Sitcoms of the past showed the ideal family; always nuclear a mum, dad and kids. The dad was respected and it had a bread winner mum-housewife cooks and cleans with two kids, the son is mostly the clever one and the daughter follows in the footsteps on her mother. E.g. leave it to beaver and the Cosby show. Sitcoms are popular because they relate to real people, take the Simpsons as an example, Homer can relate to people that an unorganised an lazy people; Marge is a representation, responsible, hardworking housewife; in Lisa we can relate to nerdy person and through Bart can relate to people that are not very clever and like skate boarding and rock music. The Simpsons opening scene starts with the title effect which Christmas snow effect with jungle bells and at the start of the scene there are late to a special Christmas concert where they arrive there children will be singing and when they arrive we know that the parents are tired and Homer drives fast and hits the car at this opening scene is called The Simpsons Roasting on an open fire which we know that there will be trouble. It follows the traditional structure of sitcoms. It has an orientation when the family prepare for Christmas and it is going to be expensive which is the beginning of the story; a complication produces problems, which makes the audience laughs when Homer doesnt Evaluate the extent to which The Simpsons follow the conventions of a typical Sitcom The Simpsons are an animated U.S Sitcom family and up to a point are a typical realistic family of five. They have their good and bad times. In this essay, I will be evaluating to what extent The Simpsons follow the conventions of a stereotypical Sitcom. To support this, I am going to be referring in detail to an episode of The Simpsons called The Simpsons Roasting On An Open Fire. A Sitcom is a 30 min comedy T.V show about a family; in a sitcom the main character is usually the father. I will analyse how sitcoms have changed over time, Sitcoms use to only air upper/middle class familys which were white familys only, but as time went past ant the racism cooled down, they started to air black familys as well, in my opinion The Simpsons are made bright yellow is to make a joke out of sitcoms because sitcoms use to be aired as white people only in the past. The opening sequence in the episode starts with the title The Simpsons Roasting On An Open Fire with some jingle bells and Christmas effects. Then it jumps into Homer Marge driving to their childrens concert in dangerous situations. Marges voice makes her sound really tired, but homers voice just makes him sound silly, not the typical father you would find in other Sitcoms. Marge actually believes that Barts ironic humour is right; it shows that they must care for Bart more in my opinion. From analysing The Simpsons Roasting on an open fire I have seen that the orientation is getting ready for Christmas expenses. Evaluate the extent to which The Simpsons follow the conventions of a typical sitcom. Refer to a specific episode that you have watched to support your evaluation. A sitcom is another word for situation comedy for example, Leave It to Beaver which was the first US sitcom in the 1950s. A sitcom is usually about a family consisting of dad, mum and two children. This is called a nuclear family. The situation or setting that the story takes place in is their home. Sitcoms are shown on TV and usually lasts for half an hour. It is a comedy and you can usually hear a live studio audience in the background. In the past, sitcoms always showed happy conventional white families who were always perfect. Dad was always the breadwinner and had a highly respectable job and the mother was always very attractive and happy to stay looking after the home and children. In Leave it to Beaver the son was a high achiever like the father and the daughter wanted to be a homemaker like mum. Sitcoms have changed over time because today mothers may now have careers and dads have to have respect for their wives just as they have respect for themselves. These days family problems are not hidden and people want to see realistic life-like situations in sitcoms. However although sitcoms started to show other families like a black family in The Cosby Show, they were still upper middle class. The Simpsons was the first sitcom to really show problems faced by working class families. Sitcoms are popular because all ages can watch it for fun and enjoyment; charaters of all ages provide someone for everyone to identify with. The Simpsons are even more popular because as an animation they can also have other celebrity characters such a Barry White and Michael Jacson. The Simpsons episode Simpsons Roasting On An Open Fire had an opening sequence where the title came up through snowflakes and jingly music. We hear Marge speaking to Homer saying Oh slow down Homer! which shows she is worried. Homers response, We dont have time to slow down were late makes us think that he is stubborn, wanting things his way and that he doesnt think too much about the safety of his wife and baby. This opening sequence immediately lets us see that this family is not perfect but realistic. We can see from this episode that The Simpsons does follow the traditional narrative structure. The audience gets orientation from not only the opening sequence but also the next couple of scenes where they were at the school Christmas performance, putting up Christmas lights and the children asking for expensive difficult presents. Evaluate the extent to which The Simpsons follow the conventions of a typical Sitcom The Simpsons are an animated U.S Sitcom family and up to a point are a typical realistic family of five. They have their good and bad times. In this essay, I will be evaluating to what extent The Simpsons follow the conventions of a stereotypical Sitcom. To support this, I am going to be referring in detail to an episode of The Simpsons called The Simpsons Roasting On An Open Fire. A Sitcom is a 30 min comedy T.V show about a family; in a sitcom the main character is usually the father. I will analyse how sitcoms have changed over time, Sitcoms use to only air upper/middle class familys which were white familys only, but as time went past ant the racism cooled down, they started to air black familys as well, in my opinion The Simpsons are made bright yellow is to make a joke out of sitcoms because sitcoms use to be aired as white people only in the past. The opening sequence in the episode starts with the title The Simpsons Roasting On An Open Fire with some jingle bells and Christmas effects. Then it jumps into Homer Marge driving to their childrens concert in dangerous situations. Marges voice makes her sound really tired, but homers voice just makes him sound silly, not the typical father you would find in other Sitcoms. Marge actually believes that Barts ironic humour is right; it shows that they must care for Bart more in my opinion. From analysing The Simpsons Roasting on an open fire I have seen that the orientation is getting ready for Christmas expenses. Evaluate the extent to which The Simpsons follow the conventions of a typical Sitcom The Simpsons are an animated U.S Sitcom family and up to a point are a typical realistic family of five. They have their good and bad times. In this essay, I will be evaluating to what extent The Simpsons follow the conventions of a stereotypical Sitcom. To support this, I am going to be referring in detail to an episode of The Simpsons called The Simpsons Roasting On An Open Fire. A Sitcom is a 30 min comedy T.V show about a family; in a sitcom the main character is usually the father. I will analyse how sitcoms have changed over time, Sitcoms use to only air upper/middle class familys which were white familys only, but as time went past ant the racism cooled down, they started to air black familys as well, in my opinion The Simpsons are made bright yellow is to make a joke out of sitcoms because sitcoms use to be aired as white people only in the past. The opening sequence in the episode starts with the title The Simpsons Roasting On An Open Fire with some jingle bells and Christmas effects. Then it jumps into Homer Marge driving to their childrens concert in dangerous situations. Marges voice makes her sound really tired, but homers voice just makes him sound silly, not the typical father you would find in other Sitcoms. Marge actually believes that Barts ironic humour is right; it shows that they must care for Bart more in my opinion. From analysing The Simpsons Roasting on an open fire I have seen that the orientation is getting ready for Christmas expenses. Evaluate the extent to which The Simpsons follow the conventions of a typical Sitcom The Simpsons are an animated U.S Sitcom family and up to a point are a typical realistic family of five. They have their good and bad times. In this essay, I will be evaluating to what extent The Simpsons follow the conventions of a stereotypical Sitcom. To support this, I am going to be referring in detail to an episode of The Simpsons called The Simpsons Roasting On An Open Fire. A Sitcom is a 30 min comedy T.V show about a family; in a sitcom the main character is usually the father. I will analyse how sitcoms have changed over time, Sitcoms use to only air upper/middle class familys which were white familys only, but as time went past ant the racism cooled down, they started to air black familys as well, in my opinion The Simpsons are made bright yellow is to make a joke out of sitcoms because sitcoms use to be aired as white people only in the past. The opening sequence in the episode starts with the title The Simpsons Roasting On An Open Fire with some jingle bells and Christmas effects. Then it jumps into Homer Marge driving to their childrens concert in dangerous situations. Marges voice makes her sound really tired, but homers voice just makes him sound silly, not the typical father you would find in other Sitcoms. Marge actually believes that Barts ironic humour is right; it shows that they must care for Bart more in my opinion. From analysing The Simpsons Roasting on an open fire I have seen that the orientation is getting ready for Christmas expenses.