Introduction
Our design project is over anti-finger smudge technology. This technology has been a major subject of research with the advent of hand-held, touch screen devices such as phones and tablets. Anyone who has held a mobile phone or handheld game knows that in a short period of time, the glass display becomes visibly dirty without anti-smudge coatings. Unwanted finger print smudges on touch screen surfaces significantly reduces the performance and utility of the device, as well as the quality of the image and the enjoyment of the user.
Smudges are composites of materials resulting from contact with human skin and from being stored in pockets. The goal of anti-finger smudge technology is to minimize and/or eliminate finger smudges on touch screens, making them easier and more enjoyable to use. Another unexpected but beneficial effect of the anti-fingerprint smudge coatings is that because they are easy to clean, they are less likely to harbor bacteria and other pathogens, thus inhibiting the spread of disease. Anti-reflective coatings are very popular today because they enhance the contrast of high resolution displays, but an unfortunate side effect of their usage in touch applications is that fingerprints are especially visible on the surface of such low-reflective screens.
Current anti-finger smudging technology typically involves a clear screen or film often applied using vacuum suction. These coverings are hydrophobic, oleophobic and lipophobic in nature, which discourages the buildup of oily fingerprints and smudges. Another method of reducing fingerprints and smudges is to use chemical structures that increase surface tension, thereby spreading oily deposits on contact. Rather than b...
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SpecialChem editor, (2009). Dow Corning presents "Advances in Anti-Fingerprint Coatings" at ABRAFATI 2009’s 11th International Coatings Congress. SpecialChem. Retrieved from: http://www.specialchem4coatings.com/news-trends/displaynews.aspx?id=11985
SRI International. ( 2010). Anti-Smudge Coatings.
Retrieved from: http://www.sri.com/engage/products-solutions/anti-smudge-coatings
SRI International. (2010). Anti-Smudge Coatings, Easy-to-Clean Products Coatings.
Retrieved from: http://www.sri.com/sites/default/files/brochures/sri_antismudge_coatings.pdf
Sview. Anti-Fingerprint Film for Galaxy Note, Image.
Retrieved from: http://sviewfilm.com/product/screen-protector/anti-fingerprint-film/anti-fingerprint-film-galaxy-note-2
UltraTech International, Inc, (2012). Ultra- Ever Dry.
Retrieved from: http://www.spillcontainment.com/everdry
Fingerprinting is an important factor in forensics. By using the technology and expertly trained forensic scientists at our disposal, the fingerprints found at a crime scene can be the most important piece of evidence for solving a crime (4). Fingerprints fully develop in humans while still in the womb. The three most common patterns are loops. They are found in 65% of the population, the next most common is whorls which are found in 35% of the population. Lastly are arches these are found in only 5% of the world (2). Fingerprints could be visible; this means you can see marks left on a surface by oily fingers (2). Other fingerprints are latent which means you can 't see them, but there are marks left by sweat, amino acids, and other organic residue (2). The earliest known fingerprints patterns were used by the Chinese in the 700s for identification and identity of documents on clay tablets (4). Sir Francis Galton’s published book, ‘Fingerprints ' in 1892 showed everyone the individuality and permanence of fingerprints (7). Galton 's first interest in fingerprints was supposed to help in
However, fingerprint powders can contaminate the evidence and ruin the opportunity to perform other techniques that could turn up a hidden print or additional information. Therefore, investigators may examine the area with an alternate light source or apply cyanoacrylate (super glue) before using powders.
The history of fingerprint identification dates back all the way to the 200s BC. Ancient Chinese history shows details of using handprints as evidence in investigations of burglaries all the way back to 221-206 BC. Fingerprinting has been a major component in identification for crime scene investigations and law enforcement for centuries.
The article Do Fingerprints Lie? was written by Michael Specter. It challenges the subject of whether fingerprint evidence is flawless as it is generally accepted in court. For a very long time, the US court system would accept any sort of "expert testimony", regardless of whether they were legitimately experts. Opinions that were "generally accepted" in the field were allowed, even if they weren't factually proven. The case of Daubert v. Merrell Dow Pharmaceuticals brought this into a more critical light and created stricter guidelines for what could be admissible.
They have certainly come a long way from their early formulations” (Toselli, p. 14). As Agapakis noted, nitrocellulose continues to be the main ingredient in today’s nail polishes (2014, [online]). However it is with a slight twist, Toselli reported that the form of nitrocellulose is as nitrocellulose cotton, which is a liquid mixed with micro sized pieces of cotton (p. 14.). According to L’Oréal, there are “…four primary qualities of nail polish: application, drying, glossiness and duration” (2015, [online]). L’Oréal refers to the quality of application as the ease to which the nail polish goes on the finger nail (2015). The characteristic, drying, refers to the time length after applying the nail polish for it to be hard to the touch. Glossiness refers to the shine a polish gives off, while duration refers to the length of time a polish lasts on the nails before chipping occurs as L’Oréal has explained (2015). To achieve each characteristic in one bottle of nail polish different ingredients must be utilized. As Secret Ingredient: Nail Polish (2011, [online]) has stated, “Nail polish usually consists of four major types of ingredients: polymers, plasticizers, pigments and solvents.” Each of these ingredients contribute to the four primary qualities of nail polish. Besides the four major ingredients, there are a long list of additional
The three different main types of fingerprints are Loops, Arches, and Whorls (Jackson 1). Henry Faulds is known as the Father of Fingerprints and developing fingerprints (Jackson 1). His discovery of fingerprints has made a huge impact not only in his time but, in Modern Crime Scene Investigation (Jackson 1). Without fingerprinting, it would be very difficult to convict criminals of crimes and very hard to try to process information. Crime Scene Investigators make a huge impact in Forensic Science. We need CSI workers, without them people could only imagine what crime would be like not only in our community, but in our
If you look closely at one of your fingers, you’ll see lines that make a pattern. These lines are slightly raised, which means they’re slightly higher than the surface of your finger. Your skin has natural oil on it. When you touch something, like a glass of milk, you leave a fingerprint pattern of oil on the surface of the object you touched.
As the surface temperature grows hotter the fingerprint become less clear, primarily due to evaporation of the oils, which resulted in the appearance of the print in the first place. As the temperature of the surface in question increases the oils evaporated more resulting in a partial fingerprint. The opposite is true of colder surface temperature, as on cooler surfaces the fingerprint appears crisper, as the oils are preserved to the fullest capacity (Forensic Information 2015). There are several other factors which affect the capacity at which fingerprints appear. These factors include: room temperature, humidity, temperature, light, and the surface the latent fingerprint is on (Alcaraz-Fossoul, Patris, Muntaner, Feixat,& Badia, 2012). Additionally over time fingerprints which are left on a surface degrade significantly (Richmond-Aylor, Bell, Callery, & Morris, 2007). When these fingerprints are contaminated, due to any of the previously stated reasons, and an attempt at decontamination only sixty-one percent of the original fingerprint appears (Zuidberg, Woerkom, Bruin, Stoel, & Puit, 2014). This stresses the importance of ensuring that fingerprints are the best preserved by modifying the temperature of the surface the print is
James, Stuart H., and Jon J. Nordby. "Fingerprints." Forensic Science: An Introduction to Scientific and Investigative Techniques. Boca Raton, FL: CRC, 2005. 341-60. Google Books. Web. 27 Feb. 2014.
Fingerprinting information varies in numerous ways. Each person’s fingerprints are different in someway (Unique). The technical term is actually “DNA fingerprinting” because us as a person obviously cant just take a look at a fingerprint and see the difference; we must analyze the actual DNA behind it. Sometimes a miss concept of most people is, that fingerprints stay perfectly fresh for extended periods of time. Partial fingerprints and even degraded full fingerprints can turn up to be useless sometimes. Fingerprints are not admissible if they are 99.9% sure, they must be 100% or a Forensics lab will not support them. DNA Fingerprinting, and the fingerprints that are at the tips of your actual fingers are two different things. The ones we a...
Judson, Olivia. (2008). Sticky fingers: fingerprints are one of the oldest biometric measures of identity. What do we actually know about them? Natural History. 117.10. p16.
Patent which are visible to the naked eye and are often a result of someone having placed their fingers in a liquid or powdered substance, such as blood. Latent fingerprints which cannot be seem easily, and these require certain conditions and the addition of powder or chemical agents to help them be seen. (WATSON, 2008)
During the 19th century the study of fingerprints had emerged. The past few centuries we have had numerous developments in fingerprinting. A lot of people give this credit to Francis Galton, who conducted the first study of fingerprint patterns. Galton’s research showed that no two fingerprints are identical; his theory on fingerprints changed the world and the criminal justice system as a whole. Galton studied numerous fingerprints and came to the conclusion that not even identical twins will have the same fingerprints. This finding helped build the justice system and forensic science as we all once knew it. According to Galton fingerprint impressions fall into three different categories, they are loop, arch, and whorl. Another fingerprint known as latent print is a fingerprint that is formed by sweat. This type of fingerprint is not visible to the naked eye; usually a gray or black powder is used to pick up latent prints. Now that we know the three basic categories of fingerprinting, we must take a better look at how fingerprints are identified. Once we understand how they’re identified to others, we will look at some of the landmark cases that helped DNA become what it is today.
In its own way, it enhances the penetration of your toner, moisturizer and hyaluronic acid by sloughing off the dry, aged and dead skin cells on the surface.
?Robotics will boost quality and transfer efficiency levels.? Coatings (Jul.-Aug. 1991): 66 InfoTrac. Online. Nov. 2002. .