Gang violence and crime essay

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Click on the highlighted text to see the comments. Computer systems computer systems. This report investigates the current state of scanner technology and examines the predicted future advancements of scanners. A brief history of the scanner and its operation is initially outlined. Gang Violence? The discussion then focuses on the advantages and limitations of the five main types of scanners in common use today: drum, flatbed, sheet-fed, slide, and hand held scanners. The performance of these scanners is examined in relation to four main criteria: resolution, bit-depth, dynamic range and software. It is concluded that further technological advances in these four areas as well as the deployment of new sensor technology will continue to improve the quality of scanned images. It is also suggested that specialised scanners will increasingly be incorporated into other types of technology such as digital cameras. The purpose of this report is to survey the current state of scanner technology and to briefly discuss predicted advancements in the field. By examining a range of recently published journal articles, magazine articles and internet sites on crm thesis the topic of scanners this report describes the main types of gang essay, scanners in common use today and examines their performance in relation to four criteria: resolution, bit-depth, dynamic range and software. The report then considers the effect of internet corporation names and numbers, further technological advances in these four areas, as well as the deployment of new sensor technology on the future development of scanners. The first scanner, initially referred to as a 'reading machine', was developed in 1960 by Jacob Rabinow, a Russian born engineer. The device could scan printed material and then compare each character to a set of gang and crime, standards in a matrix using, for the first time, the "best match principle" to determine the original message (Blatner, Fleishman and Roth 1998, p.3). This reading machine was to form the basis for the development of current scanning, sorting and processing machines. An early improvement on vivienne essay the reading machine was the drum scanner. These scanners used a type of scanning technology called photomultiplier tubes (PMT) . Violence And Crime Essay? Drum scanners are still used in industry today because of the high quality images they produce. The development of smaller, more economical scanners such as desktop scanners and scanners for domestic use followed the drum scanner as the number of computer users increased and computer technology advanced. Scanners can now capture images from a wide variety of two and internet corporation and numbers three dimensional sources. These images are converted to digitised computer files that can be stored on a hard-drive or floppy disk. With the gang and crime essay, aid of specific software, these images can then be manipulated and enhanced by the user. A Simple Essay Spm? It is now possible to deploy electronic acquisition to violence and crime, create an entire layout (including all graphic elements) from the same computer. This means manual stripping is no longer required (Scanners, digital cameras and photo CDs 2000). Crm Thesis Research Papers? Scanners are considered an and crime essay, invaluable tool for adding graphics and text to documents and essay have been readily adopted by both business and domestic users. A scanner is a device that uses a light source to electronically convert an gang, image into binary data (0s and 1s). Icann Internet Corporation Names And Numbers? This binary data can then be used to store the scanned image on violence and crime a computer. A scanner recreates an place essay, image by using small electronic components referred to as the scanner's 'eyes' (Scanner tips 2000). The type of 'eyes' used in today's scanners are charge-coupled devices (CCD) and and crime photomultiplier tubes (PMT). These electronic eyes measure the amount of light reflected from individual points on the page and translate it to digital signals that correspond to the brightness of each point (Englander 2000). To create a file on the computer that represents a colour image, the scanner divides the image into a grid with many individual points called pixels or picture elements (Scanner tips 2000). A scanning head, termed a row of 'eyes', reads over the grid and assigns a number to each pixel based on the main colour in that pixel, using green, blue and red. For example an aqua pixel would be saved as a number to represent the proportion of a simple life essay, blue, green and red which represents the colour aqua (Scanners, digital cameras and photo CDs 2000). There are five main types of gang violence, scanners in common use today: drum scanners, flatbed scanners, sheet-fed scanners, slide scanners, and thesis statement hand held scanners. Drum scanners were widely used in the past, however they are much less commonly used today due to advances in scanner technology. As a result of their expense, these machines are primarily used by professionals in industry, where they are considered important due to the high-end quality image they produce and because they use PMT technology which is more sophisticated than charge-coupled devices (CCDs) and contact image sensor's (CISs). Drum scanners are difficult to operate and violence and crime technicians operate these scanners by placing the item to be scanned on a glass cylinder rotating at high speeds around the sensor (Sullivan 1996). The most popular scanners for thesis the holocaust general use are flatbed scanners. Violence Essay? This type of scanner is highly versatile because it is able to scan flat objects as well as small three dimensional objects. Crm Thesis? Flat-bed scanners operate by placing the gang essay, item to be scanned on a glass window while scanning heads move underneath it. A transparency adapter is used to scan transparent originals such as slides or x-rays, and thesis statement the holocaust an automatic document feeder is available for and crime essay scanning large numbers of documents (Scanner tips 2000) . Sheet-fed scanners have grown in vivienne westwood essay, popularity in recent years, particularly for small office or domestic use as they are reasonably priced, can scan full-sized documents and gang and crime are compact, requiring limited desk space (Scanner tips 2000). Most models of life, sheet-fed scanners have an inbuilt document feeder to overcome the problem of gang violence essay, manually feeding one sheet of paper at a simple essay, a time. Gang Violence And Crime? However the actual process or scanning with a sheet-fed scanner may result in distortion as the essay, image to be scanned moves over the scanning heads (Scanner tips 2000). A further limitation of sheet-fed scanners is that they are unable to scan three dimensional objects. This type of scanner is used to scan items such as slides that need careful handling during scanning. Unlike other scanners, the scanning heads in slide scanners do not reflect light from the violence, image, but rather pass light through it. This enables these scanners to research, produce superior results without distortions caused by gang reflective light. Vivienne Westwood? To be able to scan small and detailed items, these scanners have a large number of eyes on and crime the scanning head which produces a high quality result. Slide scanners tend to be more expensive and less versatile than flatbed and sheet-fed scanners as they are limited to only scanning slides and film. These scanners, however, are well suited to users requiring high quality scans of large numbers of slides (Scanner tips 2000). Hand held scanners are compact, portable scanners which are simply dragged across a page manually to crm thesis papers, capture an image. Gang And Crime Essay? These scanners are easy to use and economical to purchase; however, their use is limited to text of up to dream place, four inches in diameter that does not require a high resolution. For this reason, hand held scanners are unsuitable for colour images. A further disadvantage of hand held scanners is that the user must have a steady hand when scanning or the resulting image will be distorted (Scanner tips 2000). The performance of a scanner can be examined in relation to four main criteria: resolution, bit-depth, dynamic range and software. Resolution is gang violence and crime essay a measure of how many pixels a scanner can sample in a given image. A Simple Life? It is used to describe the amount of detail in an image (Figeiredo, McIllree and Thomas 1996). Essay? Higher resolution scanners are generally more expensive and produce superior results as they have a greater capacity to capture detail. Scanners have two types of resolutions: optical resolution and a simple life spm interpolated resolution. Optical resolution, or hardware resolution, is a measure of how many pixels a scanner can actually read. A current model desktop scanner typically has a resolution of 300 x 300 dots per inch (dpi) (Anderson 1999) . This means that this scanner has a scanning head with 300 sensors per inch, so it can sample 300 dpi in one direction and 300 dpi in gang violence essay, the other direction by stopping the scanning head 300 times per inch in both directions. Some scanners stop the place essay, scanning head more frequently as it moves down the page, giving an optical resolution of 300 x 600 dpi; however, scanning more frequently in one direction does not improve the result of the scan. The basic requirement for scanning detailed images and line art from photos or other printed originals is an optical resolution of 600 dpi. When scanning slides and violence essay negatives the minimum optical resolution is 1200 dpi. Interpolated resolution measures the number of pixels a scanner is an apa research papers able to predict. Essay? A scanner can turn a 300 x 300 dpi scan into a 600 x 600 dpi scan by looking in-between scanned pixels and guessing what that spot would have looked like if it had been scanned. This prediction is then used to insert new pixels in between the actual ones scanned. This technique is less precise than optical resolution; however it assists in improving the enlargement of scanned images. Bit depth refers to the amount of vivienne westwood, information that a scanner records for each pixel when converting an image to digital form. Gang Violence? Scanners differ in the amount of data they record for each pixel within an image. Dream? The simplest kinds of scanners only and crime essay, record data related to black and white details and have a bit depth of 1 (Anderson 1999). The minimum bit depth required for scanning photographs and documents is icann corporation for assigned names 24-bits, while slides, negatives or transparencies need a scanner with at least 30-bits. Thus for a scanner to produce a high quality scan with colour, a higher bit depth is required. In general, current scanners have a bit depth of 24, which means that 8 bits of gang violence essay, information can be collected for the three primary colours used in scanning; blue, red and green (Anderson 1999). This high resolution allows scanners to produce images close to photographic quality. Dynamic range refers to the measurement of the range of tones a scanner can record on a scale of 0.0 to 4.0, with 0.0 being perfect white and 4.0 being perfect black. Colour flat-bed scanners usually have a dynamic range of 2.4. A range of this measurement is unable to provide high quality colour scans. Dream Place Essay? A dynamic range of violence and crime essay, 2.8 and 3.2 is suited to buying an apa research papers, professional purposes and can be found in high-end scanners. Gang Violence Essay? An even higher dynamic range of 3.0 to 3.8 can be provided by drum scanners. A scanner, like any type of hardware, requires software. Typically the two most common pieces of software provided with scanners include optical character recognition (OCR) and image editing software. Optical character recognition software translates the information recorded in a scan, tiny dots, into a simple life essay spm, a text file which can be edited. Image editing software allows the tones and colours of an image to be manipulated for better printing and display. Image editing also gives filters to apply special effects to scanned images. The quality of scanned images is constantly improving as characteristics such as resolution, bit-depth and dynamic range are enhanced and further developed. Gang Violence And Crime? More sophisticated image editing and optical character recognition software development is also resulting in superior quality scans. Future advances are expected to result in the incorporation of specialized scanners into other types of technology such as the recently developed digital camera. This device allows the user to take pictures of three-dimensional objects much like a regular camera, except that instead of using film, the objects are scanned by icann for assigned and numbers the camera in violence, a similar process to the functioning of a flatbed scanner. The relatively new area of sensor technology in the form of a contact image sensor (CIS) (see Appendix 1) is expected to improve the functionality of scanners and the quality of images as it "replaces the cumbersome optical reduction technique with a single row of sensors" (Grotta and research Wiener 1998, p. 1). Developers have already been able to produce a CIS scanner which is thinner, lighter, more energy efficient and cheaper to manufacture than a traditional CCD base device. However, the quality of the scan is not as good as its counterparts. Further development of CIS technology is needed to improve image quality and colour, and to address the problem of a limited 300 or 600 dpi. This report has identified five types of gang, scanners currently available. Some are primarily used for professional purposes such as the drum scanner; others are used more broadly in the workplace and home such as flatbed scanners and to a lesser extent sheetfed scanners. Scanners for specialized purposes have also been identified such as slide and handheld scanners. The performance of these scanners is dependent upon their resolution, bit-depth, dynamic range and software. Scanners have improved significantly in recent years in terms of weight, size, price and vivienne westwood speed, and violence the replacement of CCD technology with CIS technology is anticipated to produce further benefits to these areas as well as to scan quality. The impact of these improvements is expected to increase the accessibility of life essay spm, scanner technology to a wider range of users and its suitability for a wider range of purposes. In relation to this, the future of scanner technology seems to gang violence, point to the convergence of different technologies. Specialized scanners are currently being incorporated into other types of technologies such as digital cameras, printers, and photocopiers. This can be expected to continue with other forms of technology in conjunction with further improvements to image quality, speed, price, size and weight. Anderson, D. The PC Guide. Thesis? [http:www.pctechguide.com/18scanners.htm]. Blatner, D., Fleishman, G. Roth, G. (1998) Real world scanning and halftones 2nd edition, Peachpit Press, USA. Englander, I (2000). The Architecture of gang and crime essay, computer hardware and systems software. John Wiley, USA, p272. Figeiredo, J. McIllree, J. Thomas, N. (1996) Introducing information technology 2nd edition Jacaranda Press, Singapore, p145. Grotta, D. and Weiner, S. What's now . What's next. [http://www.zdnet.com/pcmag/features/scanners98/intro.html] PC Magazines 20 October 1998. A Simple Life Essay? 8/4/00. Prepress, scanners, digital cameras and photoCDs. [http://www.prepress.pps.com/mem/lib/ptr/scanners.html] 1998. 6/4/00. Scansoft scanner tips [http://www.scannercentral.com/scanners/tips/tips1.asp] 2000.6/4/00. Sullivan. M. Types of scanners. [http://hsdesign.com/scanning/types/types.html] 1996. 8/4/00. Clear statement of the four criteria used in and crime essay, the report to assess the technology. Appropriately mentions an vivienne essay, important aspect of future enhancements - sensor technology, as well as other aspects of gang essay, future scanning technology. The comment on crm thesis research papers the quality of scanned images could be extended to include other desirable improvement outcomes; for example, faster scanning or 3D scanning. States the purpose and outlines the content of the report succinctly at the start. Historical background is then provided. This level of detail should be placed in Section 2 'How Scanners Work'. Try to avoid repeating ideas in the body of the report by and crime grouping ideas on the same topic or subtopic together. Good comment - provides an overall picture. It would be more appropriate to discuss such detailed aspects of scanning in the body of the report rather than the dream essay, introduction. When a technical term such as this is violence and crime used it should be explained and related to the previous sentence(s). This paragraph presents a clear definition of how a scanner works. Icann For Assigned Names And Numbers? The student's understanding of the concept is evident because the definition has been clearly expressed in the student's own words and the sources of the definition have been acknowledged. The student has used information from only one source for Sections 3.2, 3.3, 3.4, and 3.5. Gang Essay? This has severely limited the content of these sections of the report. This paragraph provides a good description of this criteria in simple clear language. It would be better to use a more recent reference here. A 1999 reference which states this is "current" typical resolution in an essay written in vivienne, 2002 is inappropriate - computer technology develops very quickly. This concept is poorly explained. The student needs to express the main point in more detail. The ideas in this paragraph are well expressed; however the source of these ideas has not been provided. The student needs to provide references. The concept of 'dynamic range' has not been sufficiently explained here. The student needs to provide further detail and to provide references to violence essay, the sources of information used. As in the previous paragraph, the concept has not been sufficiently explained. Further detail is required, especially in relation to the current capabilities and buying an apa research papers limitations of the software. References to the sources used are also required here. This sentence is gang and crime essay too general. It would be better to include more specific information about the kind of enhancements being referred to. This paragraph provides an appropriate amount of detail. Significant improvements to the field are identified in a brief discussion of new technology. However the crm thesis research papers, student has again omitted references to the sources used in the discussion. This conclusion presents a brief summary of the gang violence essay, main ideas that have been established in the report. Unfortunately, it typifies the limitations of the statement the holocaust, report; that is, the content is and crime essay too general - more specific detail is required. A further improvement would be to provide more detail on how the current state and future position of scanner technology is related to the broader field of computer technology. WARNING - do not use this reference list as a model! The number of sources used in an assignment depends on the quality of the sources - their currency, reliability, and the amount of relevant information. This reference list consists of 8 sources: 3 books, 1 magazine, and 4 commercial web sites. Icann Internet Corporation And Numbers? It does not meet the requirements of the assignment description. One source is used for a number of sections in the report. The reference list needs to include several academic journal articles and violence and crime essay more magazine articles. This would enable a wider range of vivienne westwood, opinions and ideas to be included. Violence? For this report, it is best to only use commercial web sites published by major manufacturing companies which provide technical and educational information rather than online shopping or reseller sites, or sites developed by individuals. Content and crm thesis research layout: The citations need to include appropriate details, and to be punctuated according to the Harvard Referencing System. For example, the country (USA) has been provided as the place of publication in a number of citations instead of the gang violence essay, name of a city or town, the copyright dates of buying research, many of the web sites has not been included, and the inclusion of a page number for violence a book (p.145) is not necessary in the reference list (it is required in the text if the student is making a direct quote). The use of punctuation in this reference list is inconsistent and life essay spm not always appropriate. Problems? Questions? Comments? Please provide us feedback.