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Table of Contents Table of Contents Knowledge Gaps ................................................................................................................................................................. 2 Literature Search Parameter .............................................................................................................................................. 3 The biomechanics of blade shaving ................................................................................................................................... 4 Safety razors ....................................................................................................................................................................... 6 Method of sequentially molding a razor cap ..................................................................................................................... 7 Liftware ............................................................................................................................................................................... 8 Gillette Treo ........................................................................................................................................................................ 9 Email from Mary Ellen Curran ......................................................................................................................................... 10 Disorders of the Nervous System .................................................................................................................................... 11 Spastic Cerebral Palsy ...................................................................................................................................................... 12 Muscular Dystrophy ......................................................................................................................................................... 13 Cerebral Palsy – Britannica .............................................................................................................................................. 14 Cerebral Palsy – Gale ....................................................................................................................................................... 15 The Pros and Cons of Laser Hair Removal ....................................................................................................................... 16 WrightStuff.Biz ................................................................................................................................................................. 17 Aditi Dugar ....................................................................................................................................................................... 18 Gripeez Built-Up Grip with Men’s Safety Razor .............................................................................................................. 19 Gillette Treo – Reviews .................................................................................................................................................... 20 Maggard Razors ............................................................................................................................................................... 21 Nair ................................................................................................................................................................................... 22 Pros and Cons of Hair Removal Creams .......................................................................................................................... 23 Dangers of Nair Hair Removal ......................................................................................................................................... 24 Safety Razor System ........................................................................................................................................................ 25 Threading Hair Removal 101 ........................................................................................................................................... 26 WaXing Hair Removal 101 ............................................................................................................................................... 27 Knowledge Gaps Knowledge Gap Resolved By Definition Lubricating strip (lubrastrip) WPI Summon – “lubricating strip” Reference p. 5 Trunk Strength Googling “trunk strength” Core Strength 2 Literature Search Parameter Database/Search Engine Keywords WPI Summon Google Patents Google Search 3 Source Title The biomechanics of blade shaving Source Citation Cowley, K. and Vanoosthuyze, K. (2016), The biomechanics of blade shaving. Int J Cosmet Sci, 38: 17–23. doi:10.1111/ics.12330 WPI Summon: “razors” and “shaving” Source Found By Journal Article Source Type Beard, Biomechanical Phenomenon, blade, friction, Hair Removal/adverse Keywords effects/instrumentation, humans, irritation, male, razor, shaving, Skin **Focused on beard shaving. How skin irritation is caused concerning the forces in blade Summary shaving as well as the engineering of the physical razor and the process of shaving. Wanted general information about how razors work Reason for Interest Three forces in shaving: Notes 1. Perpendicular to skin – for loading the razor 2. Parallel to skin – for dragging the razor 3. Cutting the hairs Majority of razors can pivot forwards and backwards to spread load evenly on skin. There is a ratio between the number of blades and the space between the blades. Less space between blades=less load on each blade and less skin irritation from blades. Bigger cartridge=more skin irritation. The skin stretches up to 20% when shaving. This can cause irritation. Lubricating elements (shaving gel, lubricating strip, etc.) can cause less drag/irritation by reducing friction. Lubricating strip is usually placed after the blades. Wet shaving (when hair is hydrated) causes less irritation (force to cut beard is 40% less). Skin irritation can be measured using laser speckle contrast imaging (LSCI). Questions 4 Pre-Conditioning During Testing Questionnaire Results Phase (for lubrication) •7 days • 16 people shaved • Questions about • Most preferred the •shave wit Gillette with a 2-blade the shaving 5-Blade razor Fusion ProGlide razor for 1 week experience • There is a Razor and 5-blade razor • 5 Point Scale, connection •Use Gillette for another week Poor to Excellent, between blood Series gel • The people would used for key flow (measured by arrive and get attributes: LSCI) and the acclimated with • Being consumer ratings the temperaite of comfortable for the razors the room for 15 while shaving min (before shave) • Gliding smoothly and get over your skin measurements • Not leaving you taken with LSCI with nicks and • Measurements cuts were taken 10 min • 10 point scale, Not post shave again at all to extremely, • Measurements used for attributes were taken on the relating directly to right side of the skin soreness: neck • Visibly Red • Sore • Burning 5 Source Title Safety razors Patent #: US6941659B2 Source Citation Original/Current Assignee: Gillette Co LLC Grant Date: 2005-09-13 Google Patents: “Lubricating strip” Source Found By Patent Source Type Safety razor, Lubricating strip, Guard, Razor, elastomeric strip, backstop Keywords Focused on the components of a razor head and lubrication. Backstop. Summary Wanted to learn more about the Lubricating strip Reason for Interest The thicker the lubrication, the less friction there is between the skin and the blades. Direct Notes relation. What is a guard? I’m confused on the diagrams. What is an elastomeric strip? What is a Questions backstop? 6 Source Title Method of sequentially molding a razor cap Patent #: US4778640A Source Citation Original/Current Assignee: Warner-Lambert Co LLC Grant Date: 2005-09-13 Google Patents: “Lubricating strip polyethylene oXide” Source Found By Patent Source Type Lubricating strip, polyethylene oXide, razor Keywords Focused on the lubricating strip and its chemical make up and how to attach the strip to the Summary razor Wanted to learn more about the Lubricating strip and its chemical components Reason for Interest The strip is made separately then attached to the head. “The strip is attached either by the Notes use of acrylate adhesives or by mechanical means.” Made of polyethylene oXide and polystyrene. High temperatures need to be reached to mold the strip and the razor cap. Confused on the two different ways that the strip is attached. Questions 7 Source Title Liftware https://www.liftware.com/steady/ Source Citation Googling “utensils for Parkinson’s” Source Found By Website/company Source Type Parkinson’s, utensils Keywords Utensils were made that include stabilizing technology so that Parkinson’s patients can eat Summary without the food falling off of the utensil. Wanted to learn the technology used in helpful Parkinson’s inventions. Reason for Interest The stabilizing technology was created using Arduinos. I am looking more into the Notes mechanical aspects of things. Because there is no mechanical inventions for Parkinson’s, and my project is dangerous because it concerns blades, I think that I will stay away from the Parkinson’s aspect of things. Questions 8 Source Title Gillette Treo https://gillette.com/en-us/handlewithcare Source Citation Googling “Gillette Treo” Source Found By Website/company Source Type Gillette, Treo, assisted shaving Keywords Gillette
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