Digital Image Metadata and Exif files - Forensics Research Paper

Digital Image Metadata and Exif files - Forensics - Research Paper Example (University of Reading, 2011) Data of raster images are represented in the form of a pixel which is the smallest part of a display screen. Each pixel represents the colour and its intensity. Raster is a display space of x and y grid for two dimension image and x, y and z coordinate for three dimension images. The raster images are difficult to modify without loosing any information as they are mapped directly to the raster space. The size of raster image files is usually far more than the size of vector image files. The most common types of raster images files include BMP, GIF, TIFF, JPEG and PNG. (Whatis.com?, 1997) Tagged Image File Format (TIFF) type of digital images contains complete information about the images and no data is lost when saved. It is generally referred as â€Å"lossless† format. Their sizes are too big to be suitable for delivery by web. (University of Reading, 2011) Joint Photographic Experts Group (JPEG) type of digital images compresses data when saved. It looses its data whenever any modification is done and therefore generally referred as â€Å"lossy† format. It is good for delivery of photographic images by web. (University of Reading, 2011) Graphical Interchange Format (GIF) type of digital images is used for icons and graphics having limited range of colours. It does not loose information when saved and therefore generally referred as â€Å"lossless† format. It is good only for some types of images and used mostly on internet. (University of Reading, 2011) Portable Network Graphics (PNG) type of digital images is added recently in graphics file types. It has better compression result and support true colours. It is high quality and small size digital image file. (University of Reading, 2011) Data of vector images on the other hand is represented by vector objects which are geometrical figures such as lines, circles, rectangles, curves and many more shapes of geometry. Scaling, transformation, resizing, and resha ping are accurately done on vector images as its data is based on mathematical instructions. The most common types of vector image files have extension of SVG. They are used in software that is dedicated towards drawing and illustration such as Adobe Flash, CorelDraw, Inkscape, ACD Canvas, etc. Figure 1 shows comparison between digital images of Raster and Vector types. (JISC Digital Media, 2009) Figure 1: Comparison of Raster Images and Vector Images (JISC Digital Media, 2009) Metadata Metadata is the digital information that describes structure and relationship amongst different contents of digital data files. Earlier databases stored metadata as headers of the actual data files. Metadata is stored in a separate database file generally referred as registry or repository. For example, Windows operating system have registry in which the structure of entire hardware, device drivers and actual data is stored. (Bargmeyer & Gillman) The simplest example of metadata is an index of a book which gives the name of the chapters in the book and page numbers where it is located. If an index is removed from the book, it becomes extremely difficult to find any chapter whenever some information is needed. Similarly, metadata helps in organizing, storing, processing, retrieving and displaying contents of a data file which is otherwise meaningless. Metadata adds meaning to a data file by interpreting its contents according to its context. Digital Image files did not have

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

Genre - Essay Example This will enable in the better presentation of the architecture blog. Designs are the major part of concern and this genre is given more importance when compared to other features of the site. Due to this factor, the designs must be updated frequently. This will attract the viewers and make them understand about a specific architecture. Blogs contain features that allow the viewers to post their comments, pictures and updates. The blog, ‘Daily dose of architecture’, consists these features and it also provides the users with an option to share the pictures with their friends. There are several blogs that provide information about architectures. The feature that makes this blog unique is the way they provide information regarding a particular architectural marvel. Out of these three blogs, each of them follows a certain standard depending on which they provide information about architecture. ‘Daily dose of architecture’ is a blog where the readers get to know about architectures around the world. Information on the home page is updated on a daily basis and readers get a chance to know about the new aspects of architecture. Each day a picture of either a building or some unique construction is put up on the blog’s home page. This kindles the interest of the reader thereby providing them with all the required information. The pattern and color scheme of the blog attracts every reader and they have incorporated unique patterns and fonts to make the blog more interesting. For each link and feature, a picture is included with text and this makes the process of blogging an enjoyable experience. Even the font and color schemes are different for each page and the pictures, texts and colors have been selected with utmost care. Each and every blog differs in its own way. When considering ‘Daily dose of architecture’, it concentrates more on pictorial representation and explanation when compared to textual explanations. The concept of a

The US position in the two Iraq wars Essay Example | Topics and Well Written Essays - 7500 words

The US position in the two Iraq wars - Essay Example It is further submitted that in order to discuss the US position in both Iraq wars it is necessary to consider the background to the relationship between America and Iraq preceding the Gulf wars. It is proposed that the fall of the Soviet Union and the changing world order in the aftermath of the cold war triggered a change in the international political framework, thereby altering the traditional theory of international relations as evidenced by Operation Desert Storm. This further marked a turning point in US foreign policy objectives in the Middle East, which was cemented by the events of September 11. To this end, Operation Iraqi Freedom is a prime example of this as a foreseeable end to the US war in Iraq remains precarious, leading to justifications of necessary humanitarian interventions and post conflict peace building. Therefore, in considering the US position in the two Iraq Wars, I shall consider the background to US foreign policy in Section 2, followed by a discussion of Operation Desert Storm in Section 3. In Section 4 I shall undertake a comparative analysis of Operation Iraqi Freedom followed by a discussion of the blurring of the distinction between military operations and legitimate peace building initiatives. In Section 6, I shall consider the Operation Iraqi Freedom in context of the increased role of private military contractors by the US, followed by a conclusion in section 7. If we consider the historical backdrop of US foreign policy, it is evident from the early 1794 the Neutrality Act, which was re-enacted and amended in 1818; that US foreign policy has roots in developing international laws of neutrality, by aiming to secure general acceptance of internal policy pronouncements â€Å"on such matters from the countries of Europe throughout the late eighteenth centuries onwards† (Boyle, 2002 at

The role of government in safety policy for airpotrs since the attacks Essay

The role of government in safety policy for airpotrs since the attacks of september 11,2001 - Essay Example s well as people in buildings and on the ground are to be protected, terrorists of aviation must be prevented from passing through security checkpoints and gaining access to aircraft. Before September 2001, U.S. General Accounting Office’s (GAO) involvement in aviation security was to oversee the Federal Aviation Administration (FAA) which had responsibility for aircraft safety, all under the auspices of the Department of Transportation (DOT). Studies conducted by the GAO had consistently demonstrated that there were major weaknesses in aviation security and this had been a problem for a long time. Among the most important aspect of these weaknesses involved airport screening. The industry was not required to screen checked baggage on domestic flights and proved inadequate in the detection of threats when carry-on bags or screening passengers prior to their boarding aircraft. It also provided insufficient security for air traffic control computer systems and inadequate means for restricting access to secure areas at airports and facilities. The Congress and the administration have reorganized the federal agencies responsible for transportation security, tr ansferring them to the new Department of Homeland Security, and the agencies are attempting to enhance security without unduly inhibiting the movement of goods and people. The Transportation Security Administration, which was created in November 2001 and has assumed overall responsibility for transportation security, has made considerable progress in addressing aviation security challenges. Prior to 9/11, airline screeners were hired by the airlines or airports directly. They frequently did not detect terrorist material located either on the passengers or in their carry-on baggage. According to a GAO report in June 2000, a study of screeners conducted in 1987 discovered that airport screeners failed to observe 20 percent of the potentially hazardous items that the FAA used in its tests. Data collected

The US position in the two Iraq wars Essay Example | Topics and Well Written Essays - 7500 words

The US position in the two Iraq wars - Essay Example It is further submitted that in order to discuss the US position in both Iraq wars it is necessary to consider the background to the relationship between America and Iraq preceding the Gulf wars. It is proposed that the fall of the Soviet Union and the changing world order in the aftermath of the cold war triggered a change in the international political framework, thereby altering the traditional theory of international relations as evidenced by Operation Desert Storm. This further marked a turning point in US foreign policy objectives in the Middle East, which was cemented by the events of September 11. To this end, Operation Iraqi Freedom is a prime example of this as a foreseeable end to the US war in Iraq remains precarious, leading to justifications of necessary humanitarian interventions and post conflict peace building. Therefore, in considering the US position in the two Iraq Wars, I shall consider the background to US foreign policy in Section 2, followed by a discussion of Operation Desert Storm in Section 3. In Section 4 I shall undertake a comparative analysis of Operation Iraqi Freedom followed by a discussion of the blurring of the distinction between military operations and legitimate peace building initiatives. In Section 6, I shall consider the Operation Iraqi Freedom in context of the increased role of private military contractors by the US, followed by a conclusion in section 7. If we consider the historical backdrop of US foreign policy, it is evident from the early 1794 the Neutrality Act, which was re-enacted and amended in 1818; that US foreign policy has roots in developing international laws of neutrality, by aiming to secure general acceptance of internal policy pronouncements â€Å"on such matters from the countries of Europe throughout the late eighteenth centuries onwards† (Boyle, 2002 at

The Marketing Plan of Crocs Shoes Assignment Example | Topics and Well Written Essays - 750 words

The Marketing Plan of Crocs Shoes - Assignment Example The company is also planning to penetrate in the existing markets to increase its sales. Â  The company has been growing at a rapid pace since 2002. The company has expanded its operations to 125 countries (Cross b). With the increasing sales of the company, the company has been successful in increasing the market share. The sales and profitability of the company are presented in the figure below: Â  Recession influenced the sales of the company as the company had shown a significant increase in the revenues and profits from 2006 to 2007. However, from 2007 to 2009, the sales of the company declined. From 2009 and onwards, the sales and profitability of the company have been increasing. Â  The company offers casual footwear for people of all ages including women, men, and children. By now, the company has sold more than 200 million pairs of footwear (Cross a). Some of the major competitors of Crocs are; Deckers Outdoor Corp. and Steven Madden (Sharma). The following image presents the revenues of the three companies; Â  The company has been expanding its operations globally. To capitalize on the opportunities in the global market, the company has been using different strategies including joint venture and acquisition. For instance, the company acquired Jibbitz, Ocean Minded, Tidal Trade, Fury, and others to expand its operations. Â  It is important for Crocs to improve the brand awareness. It has been identified that the company is relatively new in the market and many potential customers do not recognize the offerings and quality of the products of the company. Â  Promotion would be crucial to the success of the company in the next few years. The company needs to increase the brand awareness and portray a better brand image in the eyes of the consumers. Therefore the role of promotion will be significant. Â  

A drama in play format Essay Example for Free

A drama in play format Essay Gerald is not a member of the Birling family but he is still caught in their web of sin. He found Eva in a bar where he was hoping to pick up a mistress; he found her in the clutches of Alderman Megarty. Alderman was harassing Eva. When Gerald, like her knight in shining armour, made Alderman go away, they started to talk and became friends and eventually lovers. This all happened during the time that Sheila and Gerald were lovers. This is the largest part of the immoral act committed by Gerald, which was in fact not against Eva but against Shelia. Eventually he decided that their relationship had to end so he gave her some money and they went their separate ways. It is my belief that for a time Gerald and Eva were in love, as when it sinks in that she is dead he says, page 35: Sorry I well, Ive suddenly realised taken it in properly that shes dead. Gerald was the only member of the group to show some love and compassion to Eva. Later, Gerald appears to be indifferent to the death of Eva especially after the inspector has left and he believes it was all a hoax. Indifference is also shown to the fact that he sinned. Mrs Birling denied Eva benefits from a charity of which she was the chairman. This was for several reasons, but the main one was the fact that Eva fabricated a name when it was her turn to be interviewed by the charitys committee. Her name of choice was Mrs Birling, this was because it was Eric who had made her pregnant, and the real Mrs Birling obviously did not know this fact, and seemed to think that Eva was personally insulting her. Eva therefore received no benefits. This was a highly immoral act, as the members of the committee are not meant to be prejudiced towards any appeal. Mrs Birling thought that what she did was acceptable because Eva had lied. However, it was in fact not a lie as it was Erics child, also a Mr Birling, and he did propose to marry her but she had refused, as she knew it would not work. Eric was in a bar one night and he got talking to Eva, he also got drunk. He then walked Eva home and forced himself upon her, page 52: Well, I was in that state when a chap easily turns nasty. After she told him she was pregnant he began to steal money from his fathers business to help her. This was the only unintentional act of cruelty to happen to Eva, as all the others were purposeful acts of cruelty. He was not cruel to her but still he brought her suffering. He was another member of the group actually affected by the events. As he seems to have been changed for the better by the death of Eva. The Inspectors name is Goole. Pronounced the same as the ghost, or ghoul. This makes me think that he is a ghost or a spectre of some kind, sent to the Birling family to show them the errors of their ways. A lot like the ghosts of Christmas Past, Present and Future from Charles Dickens A Christmas Carol. He appears to know about Evas death before it has even happened: perhaps he has some kind of sixth sense. He says towards the end of the third act, page 54: And my trouble is that I havent much time. Is this because he knows the real police will soon call the house to ask their questions? We know in retrospect that at this point there is no dead body at the mortuary, because Gerald Croft rings the mortuary to ascertain this soon after Goole has left. I do not believe that Inspector Goole is a real police inspector. His mannerisms are unlike those of a real police officer, although he does refuse a drink at the beginning, page 11: No thank you, Mr Birling. Im on duty. I think he says this because he is acting the role of a policeman. He becomes too emotionally involved in the situation; a real policeman would keep the questioning on an official level. For example, he says to Mr Birling, page 46: Dont stammer and yammer at me again, man. Im losing all patience with you people. This story is told as a drama in play format. The end of each of the three acts, including the final one, is completed with a moment of suspense. The audience is left anticipating the next act, wondering what will happen. The audience also become emotionally attached to the characters and want to know whether Sheila and Gerald will remain engaged, they want to know what the Birlings will do with Eric, and will there be a public scandal? They are drawn in to the rights and wrongs of the characters actions, and they pass judgement upon Gerald and Erics behaviour, Mrs Birlings snobbery, Mr Birlings self righteousness. The audience listens to the moral of the story, that we are individuals in a society, who should look after each other, and not be merely out for what we can get. The final few words of the play are unexpected. We have had the feeling that the Inspector is not all he seems, but now that the real police (presumably) have telephoned, things become clearer. I wanted to see a continuation of the play, with real events, real police, and see how much the characters changed when faced with the information again. No doubt Sheila and Eric would approach the situation differently, they seem to have learned a lesson from events. On page 70, Sheila says: Everything we said had happened really had happened. If it didnt end tragically, then thats lucky for us. But it might have done. and on page 71: Youre pretending everythings just as it was before. She and Eric have moved on from their original viewpoints, and this gives us hope for the future, it is to be hoped that they would not behave so badly again in their future relationships with people. Unfortunately, we are unable to know the real ending.