...What are the pro’s and con’s of hair fiber evidence vs. other types of physical evidence?? Hair and fiber evidence can be serious to an investigation. In most cases, these alone cannot offer a helpful identification of a suspect, but these laboratory techniques can be helpful in narrowing down a list of suspects. When collecting hair evidence, it is extremely important to make sure that all hairs come from the same area of the body. This is because the physical characteristics of hair differ in different parts of the body. If a person tries to compare head hair to pubic hair, for instance, a match will probably not be made. Most hair comparisons deal with either head or pubic hair. If collecting head hair, a typical sampling can usually by obtained with about 50 full-length hairs. Approximately two dozen full-length pubic hairs are needed for a good sample. It is necessary to collect the entire length of each strand of hair, because a hair can show variation in color or other physical characteristics throughout the strand. If the size or the length of each piece of hair falls below the minimum, it can be very difficult to form any connections based on the evidence. When collecting fibers, careful examination of all fiber carriers is imperative. It is important to have somebody at the scene to specifically look for fiber clues because this kind of evidence cannot be seen with the naked eye. Clothing that could contain fibers should be bagged separately in paper bags. Every item...
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...6 Fibre to Fabric 6.1 Introduction You all know that food, clothing and shelter are the three basic needs of life. You eat food to survive and protect yourself from diseases, you need a house to live in. Why do you wear clothes? You wear clothes for protection against climate, for modesty and beauty, and also to show status. The material that you use for clothing is called fabric. If you go to a shop to buy fabric for your dress, you would see a variety of fabrics there. Do you wonder what these fabrics are made of? How you get variety in fabrics? Why are some materials warm, some soft and others rough? Why do some materials go bad after washing while others remain the same? In this lesson you will find answers to these and other similar questions. 6.2 Objectives After reading this lesson you will be able to do the following: describe and classify fibres; use the burning test to identify various fibres; state the characteristics of fibres; define a yarn; explain the methods of fabric formation. 84 :: Home Science 6.3 Fibres Do you know what fabrics are made of? Take a cloth and pull out a thread. Untwist to loosen this thread. You will see that it is made up of smaller threads or hair like strands. Pull out one of these. This single hair like strand is called a fibre. A fibre is a hair like strand from which all fabrics are made. Classification of fibres Instead of a cloth, now pull fibres from a ball of cotton. What do you see? These fibres are very small. These...
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...Fiber Research Fiber serves many functions in aiding the body perform a variety of tasks including lowering cholesterol levels by preventing or slowing the absorption of saturated fatty acids or biliary cholesterol. It has been proven through several observational studies that there are significant inverse associations between the total fiber intake and cardiovascular health and other health problems causing death. Through a recent study in China there are reports that lower cholesterol levels and lower blood pressure levels were associated with higher intakes of fiber. There have also been studies that show high-fiber vegetarian diets have been associated with a reduced risk of obesity, and induce a reduction in hypertensive individuals. Fiber is defined by the assigned reading as “the endogenous components of plant materials in the diet which are resistant to digestion by enzymes produced by humans” (XXXX). There are numerous sources fiber that one could look to in order to increase their intake including oats, buckwheat, wheat, rye, rice, barley, legumes, fruits and vegetables (though there are some that contain more than others. There are two classifications for different types of fiber and they are broken down into soluble and insoluble. Soluble fibers are fibers that have a high water-holding capacity and include pectin, gums, and psyllium. In layman’s terms soluble fiber is fibers that is soluble in water, while insoluble fibers do not absorb...
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...Fiber Genevieve Keefe SCI 241 September 23, 2010 Fiber Fiber is an important part in a person’s diet and aids in the waste elimination process. Fiber comes from plant materials that our bodies do not digest and provides many health benefits like lower cholesterol, reduces the risk of certain cancers, and heart disease. There are two types of fiber; soluble and insoluble. Soluble fiber dissolves in water, has shown it can lower cholesterol and increase heart health. Soluble fiber comes from foods like oat, fruits, and beans. Insoluble fiber does not dissolve in water, but is a gut-healthy fiber that supports regular bowel movements and reduces the risks of colon cancer. Insoluble fiber is found in whole grain foods like wheat, bran and vegetables (Bell Institute, 2006). Dietary fiber added to our daily diet improves cardiovascular health, lowers cholesterol, and makes you feel fuller, which reduces caloric intake to aid in weight loss (The American Heart Association, 2010). The daily recommendation for fiber in a person’s diet depends on age and caloric intake. According to the American Heart Association children older than two should start to adopt a diet of reduced saturated fats and obtain most of their caloric intake from complex carbohydrates. Increasing complex carbs provides the dietary fiber and nutrients needed for a child. Recommended grams of fiber are 10 grams per day for a child age five and increasing in fiber to 25 grams and above as they reach...
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...Fiber optic technology is simply the use of light to transmit data. The general use of fiber optics did not begin until the 1970s. Robert Maurer of Corning Glass Works developed a fiber with a loss of 20 dB/km, promoting the commercial use of fiber. Since that time the use of fiber optics has increased dramatically. Advances in fiber technology, lower production costs, and installation have all contributed to the wide use of fiber. The heaviest use of fiber is in the telecommunications industry. Telephone companies initially used fiber to transport high volumes of voice traffic between central office locations. During the 1980s telephone companies began to deploy fiber throughout their networks. Fiber technology allows companies to "future proof" networks. We use the phrase "future proof" because fiber is theoretically unlimited in bandwidth. Bandwidth is a measurement of the data carrying capacity of the media (in this case, fiber). The greater the bandwidth, the more data or information that can be transmitted. Copper has a bandwidth and a distance limitation, making it less desirable. Optical Fiber Construction Optical fiber is composed of several elements. The construction of a fiber optic cable consists of a core, cladding, coating buffer, strength member and outer jacket. The optic core is the light-carrying element at the center. The core is usually made up of a combination of silica and germania. The cladding surrounding the core is made of pure silica. The cladding...
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...Fiber Michelle Martinez SCI/220 November 9, 2013 Professor Hatton Fiber #2 Tell me about fiber. Fiber is a nutrient known as roughage needed to help digest food. Fiber can be found in fruits, vegetables, and whole grains. Fiber should be part of our diet in order to keep our digestive system regular and healthy. Fiber isn't digested by your body. Instead, it passes relatively intact through your stomach, small intestine, and colon and out of your body (Dietary Fiber: Essential for a Health Diet, 2013). Lack of fiber can bring discomfort and health issues. What are the benefits of fiber and the problems with a low-fiber diet which include problems outside of the GI tract? Benefits of a high fiber diet for example are 1) Fiber keeps the body regular, helps pass stool easier, prevents constipation, and solidifies the stool because fiber absorbs water and adds bulk to the stool 2) Fiber can lower cholesterols levels such as beans, oats, and flaxseeds which are soluble fiber and may lower blood cholesterol levels by lowering bad cholesterol 3) Fiber maintains bowel health because fiber ferments in the colon and can help prevent hemorrhoids and diverticular diseases 4) Fiber can aid with weight loss because high fiber food need to be chewed more, which gives the body time to absorb and can make you feel full. (Dietary Fiber: Essential for a Health Diet, 2013) The reason people have to limit their fiber intake due surgery, inflammatory disease, or narrowing of the...
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...EXECUTIVE SUMMARY You may ask yourself what is needed for a new building and what are the codes that must be followed in order to have a building nice and free of hazards. Well to start here are the new building requirements for the following materials: patch cables, cat 6 cables, fiber optic multi-mode, cable trays, Cisco- WS-C3750 G24PS-S 24 Ports, laser printer, vertical runs, computers, Cisco border router, server run a and server run b. The following codes must be in play to ensure the building or work space is safe for everyone. 1. American National Standards Institute (ANSI). 2. Electronic Industries Alliance (EIA) 3. Telecommunications Industry Association (TIA) 4. Insulated Cable Engineers Association (ICEA) 5. National Fire Protection Association (NFPA) 6. National Electrical Manufacturers Association (NEMA) 7. Federal Communication Commission (FCC) 8. Underwriters Laboratories (UL) 9. International Organization for Standardization (ISO) 10. International Electrotechnical Commission (IEC) 11. Institute of Electrical and Electronic Engineers (IEEE) 12. National Institute of Standards and Technology (NIST) 13. International Telecommunications Union (ITU) 14. CSA International (CSA) 15. IP/MPLS Forum (ATM Forum) 16. European Telecommunications Standards Institute (ETSI) 17. Building Industry Consulting Services International (BICSI) 18. Occupational Safety and Health Administration (OSHA) 19. ANSI/TIA-568-C Cabling Standard The following...
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...High Fiber Diet and Diabetes: effect of soluble and insoluble fiber on plasma glucose levels. Introduction Obesity associated with low physical activity is a leading cause of type II diabetes mellitus. (Montonen J et al. 2002) Diet and eating habits are major contributing factors in the development of obesity, thus diet is one of the modifiable risk factors that can ultimately lead to or prevent the development of non-insulin dependent diabetes mellitus. (Ventura E. et al 2009) Strong evidence has shown that a high fiber, particularly one that is high in whole grain diet can play a preventative role against developing type II diabetes mellitus. (Montonen J et al 2002) Moreover, low glycemic index, high fiber diets have shown a beneficial effect in controlling diabetes and reducing diabetes occurrence. (Jenkins D. J. A. et al 2008) In addition to significantly lowering values for fasting and postprandial plasma glucose, high-fiber diets have also positively contributed to long-term weight loss and to decrease the risks of cardiovascular disease (CVD) risks. (Lindstrom J et al. 2006) Types of dietary fiber and their properties Fiber exists in two forms, soluble and insoluble. Some examples of soluble fibers are pectin, gums ß-glucans and hemicelluloses. Foods that contain soluble fibers are fruits such as oranges and apples. Oats, barley, chickpeas, okra, and legumes also contain soluble fibers. Soluble fibers can adsorb or bind nutrients such as lipids...
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...ROCKET FIBER SIENA HEIGHTS UNIVERSITY Strategic Mgmt. of Innovation (OA) Instructor: Gregory Smith April 1, 2016 There is a large number of high speed internet companies that offer a large range of services and promise customers that they offer the fastest online speeds. Comcast is considered one of the fastest and the most expensive of the online services. They started offering their services in a bundle package of cable, phone, internet and home security to receive a maximum profit from consumers. WOW (Wide Open West) uses Comcast cable network but, charges its customer’s a fraction of the price and still gains a profit by doing so. The second largest internet provider is AT&T, they have a long history of always servicing residential customer. Now, with the introduction of U-verse a few years ago; they are one of the top giants in the cable television, internet, phone and home security industry. The newest internet service provider to enter this crowded field is Rocket Fiber. Rocket Fiber was founded last June by Marc Hudson, COO Edi Demaj and chief technology officer Randy Foster. All three of these individuals were employees of business man Dan Gilbert’s Quicken loans or Bed Rock Real Estate Services. They introduced to him the idea of high speed internet service that is one thousand times faster than cable or dsl internet. Mr. Gilbert liked the idea so much that he invested in it right away. The business man has invested so much into...
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...------------------------------------------------- Optical fiber An optical fiber is a flexible, transparent fiber made of a pure glass (silica) not much wider than a human hair. It functions as a waveguide, or "light pipe", to transmit light between the two ends of the fiber.[1] The field of applied science and engineering concerned with the design and application of optical fibers is known as fiber optics. Optical fibers are widely used in fiber-optic communications, which permits transmission over longer distances and at higher bandwidths (data rates) than other forms of communication. Fibers are used instead of metal wires because signals travel along them with less loss and are also immune toelectromagnetic interference. Fibers are also used for illumination, and are wrapped in bundles so they can be used to carry images, thus allowing viewing in tight spaces. Specially designed fibers are used for a variety of other applications, including sensors and fiber lasers. ------------------------------------------------- History Fiber optics, though used extensively in the modern world, is a fairly simple and old technology. Guiding of light by refraction, the principle that makes fiber optics possible, was first demonstrated by Daniel Colladon and Jacques Babinet in Paris in the early 1840s. John Tyndall included a demonstration of it in his public lectures in London a dozen years later.[2] Tyndall also wrote about the property of total internal reflection in an introductory...
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...look into the studies on fiber we find that fiber is important for gastrointestinal health as well as cholesterol-lowering benefits. Fiber is mainly used by your body to clean it out easier. It passes through your body unchanged and will push everything in front of it in the digestive system along, making the digestive process easier. Another function for fiber is to regulate how full you are. The amount of fiber you eat is what gives you the full feeling when you eat a lot. Some of the places you can find fiber is in oats, wheat and basically any food with any part of a plant in it. Fiber is a plant that cannot be broken down by the human digestive system. Intestinal bacteria are able to utilize fiber as nutrition, thus helping you to be well. Our digestive system is unable to break down dietary fiber and this indigestible ingredient has many effects on the functions of the body. Because fiber is not absorbed by the body, it does not significantly increase the energy content of food, and thus helps you to control your body weight. Soluble fiber is “soluble” in water. When mixed with water it forms and swells into a gel-like substance making the feces increase in weight. The dissolving of some fibers in water forms viscous solutions in the intestines; these are called viscous or soluble fibers. Soluble fiber has a lot of many benefits, including but not limited to, moderating blood glucose levels and lowering cholesterol. Some of the soluble fibers include pectins, gums, mucilages...
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...Fiber Research Melanie L. Moran SCI/241 February 10, 2011 Fiber is a nutrient that is found in whole grains, such as wheat, rice, oats, and rye. Fiber is also found in fruits like apples, bananas, and oranges. It is found in some vegetables, such as carrots, peppers, rhubarb, and avocados. One can also get fiber from peas, beans, and legumes. Fiber helps to maintain proper bowel function, and it helps to prevent some cancers, for examples fiber helps to protect against breast cancer, and colon cancer. Fiber lowers cholesterol, stabilizes blood sugar, and helps to prevent obesity by making a person feel like they are full longer and as a result, eat less. There are two kinds of fibers; soluble and insoluble. Soluble fiber dissolves in water to form a gel – like substance that swells. Soluble fiber helps to keep blood glucose levels where they should be and lowers ones cholesterol. Examples of soluble fibers are oats, beans, peas, apples, and berries. The other type of fiber is insoluble fiber; this type of fiber does not dissolve. Insoluble fibers increase the movement of material through ones digestive tract. Examples of insoluble fiber are whole wheat breads, wheat cereals, cabbage, beets, carrots, Brussels sprouts, and apple skins. It is important that an adult who consumes a diet that consists of two thousand calories daily should eat six to eight servings of grains each day and a total of twenty five grams of fiber daily. It is recommended that children follow the...
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...History of Fiber Optics The idea of using light waves for communication can be traced as far back as 1880 when Alexander Graham Bell invented the “photo-phone” shortly after he invented the telephone in 1876. In this remarkable experiment, speech was transmitted by modulating a light beam, which traveled through air to the receiver. The flexible reflecting diaphragm (which could be activated by sound) was illuminated by sunlight. The reflected light was received by a parabolic reflector placed at a distance of about 200 m. The parabolic reflector concentrated the light on a photo-conducting selenium cell, which formed a part of a circuit with a battery and a receiving earphone. Sound waves present in the vicinity of the diaphragm vibrated the diaphragm, which led to a consequent variation of the light reflected by the diaphragm. The variation of the light falling on the selenium cell changed the electrical conductivity of the cell, which in turn changed the current in the electrical circuit. This changing current reproduced the sound on the earphone. Fiber Optic Technology Fiber Optic is a technology that uses glass as thin as a human hair to transmit data from one place to another by sending pulses of light through an optical fiber. The light forms an electromagnetic carrier wave that is modulated to carry information. A fiber optic cable consists of a bundle of glass threads, each of which is capable of transmitting messages modulated onto light waves. It is widely...
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...Week 3 CheckPoint Fiber Research Week 3 CheckPoint Fiber Research Phoenix University SCI 241 The role that fiber plays in a human body, is that it’s the main function in the body is to regulate a person’s digestion. Some examples of food sources for fiber can be found in bread, pasta, flax and seed. Researches have also found out that most yogurts now have a fiber additive, so most yogurts can be added to good food sources for fiber. The difference between soluble and insoluble fiber is that soluble fiber is soluble in water, while insoluble fiber does not absorb or even dissolve in water. When you mix soluble fiber with water, the water and fiber turns into gel. The benefit of soluble fiber includes lowering a person’s cholesterol as well as moderating a person’s glucose levels. You can find soluble fiber in oats, oatmeal, peas, beans, lentils, barley, fruits and vegetables. Insoluble fiber passes through the body’s digestive system. The benefits that insoluble offers include intestinal health of a reduction in the risk of occurrence of colorectal cancer, hemorrhoids, and constipation. Insoluble primarily come from bran layers of cereal grains. The fiber recommendations for adults are 20-35 grams per day for adults, or 10-13 grams for every 1,000 calories in one’s diet. The fiber recommendation for children really depends on their age. Kids ages 4-18 need to have an intake of 25-38 grams per day. For adults it’s recommended that the amount of an adult should come...
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