To see the other types of publications on this topic, follow the link: Ski technology.
Dissertations / Theses on the topic 'Ski technology'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Ski technology.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Cortes, Morales Myrna Carolina. "Characterization of cross-country ski base material." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-85856.
Full textAbstract:
Cross-country skiing has developed to become one of the most competitive winter sports, where a skier can win by fractions of seconds. Joint efforts between ski technicians and scientist have allowed the development of methodologies to prepare the ski surface, yet much of the knowledge up to date is based on the experience of the technicians. In this sense, much attention is focused on the ski base, given that the friction at the base is an important factor that will define how fast a ski can glide. Ski base preparation is an extensive procedure, due to the several parameters that have to be taken into account. Much disagreement has risen regarding the best way to optimize the base. Thus, a complete characterization of the ski base can help to provide some clarity on the factors that affect friction. This work presents the results of the characterization of the ski base through the preparation process by observing and measuring different aspects, using characterization techniques such as LOM, optical profilometry, contact angle, DSC and XCT. The results suggest that the mechanical machining of the surface can influence wax retention and hydrophobicity. Furthermore, it is seen that wax is present after the first waxing step, despite the constant brushing and scraping. No major changes were observed for the crystallinity. Finally, the amount of graphite on the surface was quantified. This is hoped to be helpful for ski technicians and athletes alike to improve the performance of their skis.
2
Eklund, Simon. "CFD modelling of ski-jump spillway in Stornnforsen." Thesis, KTH, Marina system, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-209204.
Full textAbstract:
Traditionally when designing dams and spillways, experiments in physical scale models are conductedin order to determine whether or not the design fulls it purpose, and to identify and avoid undesiredproblems, such as unfavourable ow patterns and unwanted water splatter. Physical models can oftenbe expensive and time consuming to build, and often suer from scale eects that in uence the results.Uniper and Vattenfall have recently done experiments in a physical 1:50 scale model of the dam Stornnforsen,in order to test new solutions for the energy dissipation from the spillways. One of the testedsolutions is a ip bucket at the bottom of the right surface spillway.In this project the same solution is numerically modelled, using the CFD software ANSYS® Fluent®,and the results are compared to those from the experiments. The CFD simulations are done both in fullscale and model scale, in order to identify potential scale eects. The aspects that are compared are theheight and length of the jet from the ip bucket.In addition to the CFD simulations, the height and length are also calculated semi-empirically, usingtwo dierent methods.Altogether the results correspond quite well to the experimental values. Some possible scale eects areobserved, where the jet from the full scale simulation is more dispersed than the jet from the model scalesimulation. The jet trajectory from the full scale simulation is also a bit lower than the jet from theexperiments and model scale simulations.The grid independence for the simulations is not quite satisfactory, and the grid should be rened to getmore reliable results. Due to lack of time and computational power any further grid renement is notdone in this project.
3
BÄCKSTRÖM, SOFIA. "The road towards anintegrated packaging management strategy : A case study on a packaging networkat a ski brand." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-223888.
Full text
4
Louro, Alejo. "Studying the feasibility of installing a temperature independent snowmaking system with heat recovery : Case study for the ski resort of Astún." Thesis, Högskolan i Gävle, Energisystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-26662.
Full textAbstract:
A research on analysing the feasibility and the benefits obtained from the utilisation of the heat surplus from temperature independent snowmaking systems is proposed. The interest of this research relies on the fact that it is a way of making it viable both economically and environmentally, to use these systems, which are the solution for snow scarcity due to global warming.This will be done by studying the performance of three different alternatives for the installation of a TIS, considering it with and without heat recovery in order to show the importance of the latter. The study will be performed for the ski resort of Astún, in the Spanish Pyrenees, considering the desire to guarantee a ski slope of 3 km from November till end of April. The three cases studied are: • Case I: Temperature Independent Snowmaking system without heat recovery • Case II: Temperature Independent Snowmaking system with direct heat recovery • Case III: Temperature Independent Snowmaking system with direct heat recovery and snow storage The feasibility of each of the cases will be studied based on costs and energy savings and consumptions, while ecological impact, maintenance costs or the interest rates will not be included in order to simplify the results. The heat recovery will be performed thanks to a CO2 heat pump that will deliver over 6 GWh through water at 70 ºC to the residential and commercial buildings of the ski resort. The heat recovery has only been studied in detail for direct recovery, but the possibility of indirect heat recovery would be interesting in other situations, therefore, it has also been briefly described.As a way of introducing and justifying the project, a literature review has been performed, on the impact of climate change and the need for snowmaking, and also on the different snowmaking technologies and their limitations, leading finally to the need for temperature independent snowmaking. Moreover, calculations and simulations including heat transfer, fluid dynamics and theory of refrigeration technology are conducted. Finally, putting that together with estimated investment costs and prices gathered either from available public sources or personal communication with suppliers, the final comparison of the cases is performed.Based on the obtained results, the most suitable solution for the ski resort of Astún, considering the current heat demand of its buildings, is the case II, installation of a TIS with direct heat recovery. This case has a total investment cost of 1.957.464 €, and due to the savings generated from the reused heat, it comes with yearly savings of -249.872 €, which implies a payback time lower than 8 years, making it the most viable alternative.
5
Andersson, Nathalie. "Påverkande faktorer vid fastighetsutveckling på skidorter." Thesis, KTH, Fastigheter och byggande, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263125.
Full textAbstract:
Kulturen kring skidåkning i Sverige är väldigt stark, och utförsåkning är ett fritidsintresse som många svenskar delar. Sporten kan utföras på många olika platser runt om i landet, dock finns det vissa unika platser där just skidåkning är det främsta syftet med platsen. Dessa platser kallas skidorter och präglas av att de erbjuder unika möjligheter till skidåkning. För att möjliggöra besöken av dessa orter krävs det även att besökarna har någonstans att bo. De byggnader som upprättas på denna typ av plats kan ha karaktäristiska drag till följd av att de ska vara optimala för skidåkares upplevelse. Vidare kan processen med dess upprättande påverkas av flertal olika faktorer. Syftet med arbetet är att hitta juridiska och tekniska faktorer som påverkar byggandet av fritidsbostäder på skidorter, samt att analysera vilken effekt dessa kan komma att ha på projekt på denna typ av plats. Arbetet inleds med en litteraturstudie varpå områden inom fastighetsjuridik, fastighetsutveckling och omsättning på skidorter berörs. Därefter har det genomförts en fallstudie, varpå tre av de större skidorterna i Sverige har använts som grund för datainsamlingen. Insamlingen av data har gjorts genom analys av detaljplaner för utvalda områden på orterna, samt genom intervjuer med planarkitekter och exploatör som har en kollpling till orterna. Slutsatsen tyder på att det finns såväl juridiska som tekniska faktorer som påverkar exploateringen på skidorter, och att dessa har olika effekt och utgångspunkt. Det kan bland annat röra sig om riksintressen, terrängens utformning eller att marknaden efterfrågar något som exempelvis en bastu. För att erhålla ett optimalt projekt på denna typ av plats bör alla faktorer tas i beaktning.<br>The culture of skiing is very big in Sweden, and downhill skiing is a popular activity among swedes. The sport can be performed in a lot of different places around the country, but there are some unique places where skiing is the main purpose of the place. These places are called ski resorts and are characterized by the fact that they offer unique opportunities for skiing. To enable the visits of these places, it is also required that the visitors have somewhere to live. The buildings erected on this type of site can have characteristic features as a result of being optimal for skiers' experience. Furthermore, the process of its establishment can be influenced by several different factors. The purpose of the paper is to find legal and technical factors that affect the construction of recreational homes on ski resorts, and to analyze what effect these may have on projects in this type of place. The work begins with a literature study in which areas within real estate law, property development and sales of ski-passes are affected. The work has then been carried out through a case study, whereupon three of the larger ski resorts in Sweden have been used as the basis for the data collection. The collection of data has been done by analyzing zoning for selected areas of the resorts, as well as by interviews with plan architects and developers who have a cluster to the resorts. The conclusion suggests that there are both legal and technical factors that affect the development of ski resorts, and that these have different effects and starting points. In order to obtain an optimal project on this type of site, all factors should be taken into consideration.
6
Enoksson, Malin. "Barnplagg i alla storlekar." Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-16860.
Full textAbstract:
I studien tas måttlistor fram för tre barnplagg med funktionsdetaljer. Plaggen graderas för att kontrollera att skillnadsintervallerna är rimliga att skicka vidare till produktion. Studien genomförs mot ett företag som uppgiften utformas tillsammans med och som bidrar med material i form av tyg, provplagg att utgå ifrån, samt handledning.Metoden för studien är huvudsakligen experimentell forskning i form av avmätning, konstruktion, gradering och sömnad. Underlag för den experimentella forskningen består av litteratur. Huvudfokus ligger på gradering då plaggen i studien omfattar ett stort storleksspann innehållande 12 storlekar vilka är 86-152 centilong. Utöver detta kommer funktionsdetaljer samt passform att behandlas i studien. I rapporten undersöks om det är rimligt att arbeta i ett stort storleksspann där rekommenderad indelning av barnstorlekar frångås. Utöver detta undersöks även om samma kragkonstruktion kan användas till två olika jackor samt hur raglanärm bör graderas utan att minska rörelsen i ärmen.Genom att först mäta av och utvärdera de plagg som företaget tillhandahåller uppnås resultat. Därefter konstrueras och sys plaggen med funktionsdetaljer upp för att slutligen graderas. Avslutningsvis skapas måttlistor för samtliga plagg som baserar sig på framtagen gradering och som slutligen överlämnas till företaget.The main purpose of this study is to create measurement charts for three garments for children with functional features. Garments are graded to control measurements before being sent to production. The study is created in collaboration with a company who contributes with fabric, garment samples and guidance.The method of this study is mainly experimental in form of construction, grading and sewing. Literature is used as reference for the experimental parts of the study. The main focus is grading the garment which involves 12 sizes, 86-152 centilong. Functional features and fit are also a part of the study.The report examines the equity of grading in a large size range that doesn’t correspond with the chosen literature. Furthermore the study examines if the same collar construction can be used for two different jackets and how a raglan sleeve should be graded without reducing the movement in the sleeve.Result is created by measuring and evaluating samples from the company. New garments are constructed, graded and sewn as final samples with functional features. Finally measurement charts are created based on the grading and are presented to the company.<br>Program: Designteknikerutbildningen
7
Larsson, Emelie. "Wax-accessory for cross-country skiers : Development of a wax-bench that collect waste." Thesis, Luleå tekniska universitet, Institutionen för ekonomi, teknik och samhälle, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-70833.
Full textAbstract:
This is a master thesis report for MSc in Industrial Design Engineering at Luleå University of Technology. It is a development project where a wax-bench for cross-country skiing has been developed. The wax-bench have been developed to facilitate the clean-up for the user and to gather all wax-accessories at one place. In this report the entire project can be followed from start to finish, how the requirements were found, who is the user, what should the product handle and how was the ideas ge- nerated. The final result is a wax- box that is vacuum formed and folded in the middle. In the box there are adjustable profiles to place the ski on and an adjustable attachment part in the center that attaches to the skis binding. The box acts as a collector of the waste that is produced when waxing skis, and as storage of waxing accessories when not in use. How to install the accessory in the box is not yet determined, but the idea is to develop a specific bag that fits perfectly in the wax-box and includes all the usual accessories. This bag should then be taken out when you wax and put back in the box after complete the waxing.<br>I den här rapporten kan man följa ett examensarbete för civilingenjörsprogrammet Tek- nisk Design på Luleå Tekniska Universitet. Projektet består av ett utvecklingsarbete där en vallabänk för längdskidåkning har utvecklas. Vallabänken har utvecklats för att underlätta städningen för användaren och för att samla alla vallatillbehör på en och samma plats. I den här rapporten kan man följa hela projektet från start till mål, hur kraven hittades, vem är användaren, vad ska produkten klara av och hur genererades ideer. Det slutgiltiga resultatet är en valla-låda som är vakuumformad och viks ihop på mitten. I lådan finns det justerbara profiler att placera skidan på samt ett justerbart fäste i mitten som fäster i skidans bindning. Lådan fungerar som uppsamlare av skräpet som bildas när man vallar skidor och som förvaring av vallatillbehör när den inte används. Hur valla-tillbehöret ska placeras är ännu inte fastställt men tanken är att det ska utvecklas en specifik väska som passar in perfekt i valla-boxen och som har plats för alla de vanliga tillbehören. Denna väska ska sedan gå att plocka ur när man vallar och placera tillbaka i boxen efter utförd vallning.
8
Fichtali, Jaouad. "Production of caseins using extrusion technology." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74580.
Full textAbstract:
Preliminary experiments indicated that an acid casein co-precipitate could be produced by extrusion from skim milk powder (SMP). In assessing the problems encountered, experiments were designed to model and optimize the coagulation/washing process using response surface methodology (RSM), to minimize residual whey components and losses of fines. This study yielded useful information relative to improving our understanding of the coagulation mechanism and the most important variables affecting the process. In addition, RSM allowed multiresponse optimization of acid casein production using unique and newly developed optimization techniques. In order to simplify the process, an extruder die was designed to assist with the dewheying process, however, plugging problems occurred due to screw design limitations. Studies were implemented to determine the rheological behaviour of sodium caseinate and to evaluate the extruder performance in terms of energy consumption, and in terms of mixing and conveying through mathematical description of residence time distributions in the extruder. The knowledge gained from these studies was integrated to produce acid casein and sodium caseinate at pilot plant level and to conceive a plant layout of the process for the dairy industry. The process developed has many advantages, including the ability to produce a high quality product.
9
Harrison, Katherine. "Discursive skin : Entanglements of gender, discourse and technology." Doctoral thesis, Linköpings universitet, Tema Genus, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-64127.
Full textAbstract:
The aim of this study is to explore the relationship between gender, discourse and technology, and the resulting construction of bodily norms, in a contemporary environment dominated by info- and bio-technologies. The premise from which this study starts is that the ‘intra-action’ between gender, discourse and technology plays a central role in shaping contemporary identities. The study is based on close readings of material from three case studies: cyberpunk fiction, (in)fertility weblogs and the World Health Organisation guidelines on naming of biotechnologies. The distinctive combination of the three case studies provides a unique perspective on the relationship between gender, discourse and technology, showing how it shifts across different contexts, and demonstrating the socio-historical contingency of the bodily norms produced therein. This study is comprised of three empirical texts, one theoretical text and a kappa. The analysis shows how innovative cyberpunk narratives challenge not only human/non-human boundaries, but also genre and gender conventions. The specific format of the blog allows women’s experiences of infertility to be heard and produces hybrid discourses which challenge contemporary authoritative discourses about femininity. The third case study explores the assignment of International Nonproprietary Names to new biotechnologies, and the implications of this on the construction of patients’ bodies. Finally, the theoretical text contributes to existing feminist analyses of technoscience by proposing a new tool called abject/noise for examining disruptions to discursive and bodily coherence. This tool is then tested on a series of documents about the assignment of International Nonproprietary Names to new biotechnologies. Throughout, the importance of ‘situated knowledges’ is emphasised, both in how gender, discourse and technology are understood, but also in the norms produced and the position of the researcher.<br>Syftet med denna studie är att undersöka relationen mellan genus, diskurs och teknik och hur denna relation bidrar till att konstruera vissa typer av kroppsnormer, speciellt som vår samtid infärgas av informationsteknik och bioteknik. Utgångspunkten för denna studie är att ’intra-action’ mellan genus, diskurs och teknik spelar en central roll i utformningen av samtida identiteter. Studien bygger på närläsningar av material från tre fallstudier: cyberpunk-litteratur, in/fertilitetets-bloggar och Världs-hälsoorganisationens riktlinjer för namngivning av bioteknik. Kombinationen av de tre fallstudierna ger ett unikt perspektiv på relationen mellan genus, diskurs och teknik. Den visar hur relationen skiftar mellan olika sammanhang, och hur denna är kulturellt villkorad och därmed tillåter vissa kroppsliga normer att upstå och cirkulera. Denna undersökning består av tre empiriskt grundade texter, en mer teoretisk text och en kappa. Den försten analysen visar hur innovativa cyberpunk berättelser inte bara utmanar föreställningar kring det mänsklig / icke-mänskliga gränser, utan också själva genren i sig och dess kulturella konventionerna kring genus. Det specifika format webbloggen (eller blogg) i den andra fallstudien tillåter kvinnors upplevelser av infertilitet att höras och producerar genreöverlappningar och igen-kännanden som utmanar samtida normativ diskurser om reproduktiv kvinnlighet. Den tredje fallstudien undersöker tilldelningen av ett så kallat Internationellt generiskt namn till nya biotekniska produkter, och konsekvenserna detta får för konstruktionen av patienternas genusifierade kroppar. Slutligen bidrar den teoretiska texten till befintliga feministiska analyser av ’teknovetenskap’ genom att föreslå ett nytt verktyg som kallas ’abject/noise’ för att undersöka störningar i diskursiva och kroppsliga sammanhang. Detta verktyg testats sedan också analytiskt på dokumentar som rör tilldelningen av Internationellt generiskt namn till ny bioteknik. Genom hela avhandlingen läggs tonvikten på ’situerad kunskap’, både gäller hur genus, diskurs och teknik förstås kontextuellt, hur normer blir till och hur forskaren positionerar sig.
10
Xu, Yong Tai Yu-Chong. "Flexible MEMS skin technology for distributed fluidic sensing /." Diss., Pasadena, Calif. : California Institute of Technology, 2002. http://resolver.caltech.edu/CaltechETD:etd-12302004-144248.
Full text
11
Squires, Jacqueline Elaine. "Designing with technology challenging the perception of the building skin /." Cincinnati, Ohio : University of Cincinnati, 2008. http://rave.ohiolink.edu/etdc/view.cgi?acc_num=ucin1212027797.
Full textAbstract:
Thesis (Master of Architecture)--University of Cincinnati, 2008.<br>Advisor: Rebecca Williamson (Advisor), George Thomas Bible (Committee Chair). Title from electronic theses title page (viewed Sept 4, 2008.). Includes abstract. Keywords. Includes bibliographical references.
12
Raghunathan, Smitha. "The application of emerging technologies to sports technology : wired skin." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32927.
Full textAbstract:
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2005.<br>Includes bibliographical references (leaf 31).<br>Technology is continuously being developed, processed and created into products for the consumer market; however, in the steps of this process, there is often one goal in mind, and using the technology is rare used for different and novel areas. The goal of this paper is to show how three emerging technologies can be used creatively beyond their original purposes by the sports industry. The technologies addressed in the paper are The Microsoft Full Body Network, ShapeTape and the FluidFocus Lens. These technologies address the issues of wireless data and power transmission, data acquisition, and the creation of a lens with variable focus with no mechanical or moving parts, respectively. Research was done to understand the current state of the technology or product, and what obstacles remain in the path to the creation of an actual working prototype. A merging of these three technologies resulted in a proposed product for the sports industry. The name, Wired Skin, was given to this envisioned product, and was tailored in response to a survey conducted with a pool of 200 individuals. The issues of the price range customers were willing to spend on various products, the importance of various improvements to existing technology and general questions to specify the demographic questioned were addressed fully. This paper creates a melding of the three technologies into a product that addresses the major barriers to the entrance of emerging technology to the area of athletics.<br>by Smitha Raghunathan.<br>S.B.
13
Palmborg, John, and Hampus Söderman. "Vibration damping of alpine skis with implemented Flow Motion Technology." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263873.
Full textAbstract:
Flow Motion Technology AB has previously developed a technology to improve hockey skates and inlines. The technology called Flow Motion Technology (FMT) is utilizing the smooth and effective rolling motion of a human footstep, and has proven to be very successful after implementation in both hockey skates and inlines. Flow Motion Technology AB has interest in investigating whether the technology can be implemented in other sports applications, which this thesis project concerns. The project examines the implementation of FMT in the alpine skiing segment. The purpose is to provide Flow Motion Technology AB with a foundation for evaluating the potential of investing further in the development of FMT applied in alpine skiing. FMT is implemented in a feature positioned between ski and binding of most alpine race skis, commonly called a race plate. The work is divided into two parts; The first part covers the development and manufacturing of a prototype along with detailed description of the procedures and methods used. The second part is about the tests of the prototype’s vibration-damping properties carried out in laboratory environment along with analysis of the results. Initial field tests are also carried out followed by fundamental analysis. An existing plate intended for competition use is tested in parallel with the prototype and is used as a reference when analyzing the results. The results show that the ski equipped with the FMT plate dampened vibrations on an average of 27 % faster than the reference plate. Measurements was compiled for three damping intervals specified for the tests performed in laboratory. A statistically significant difference in all three cases was obtained. The measured maximum amplitude of the acceleration in the vibrations was also significantly lower for the ski implemented with the FMT plate compared to the reference plate. The eigen frequencies of the ski measured in laboratory were not significantly affected if the ski was fitted with the FMT plate or the reference plate. The eigen frequencies measured in field generally corresponded to the measured in laboratory, with the difference that they were offset on an average of 7 Hz higher in field.<br>Flow Motion Technology AB har tidigare utvecklat en teknologi för att förbättra hockeyskridskor och inlines. Teknologin kallad Flow Motion Technology (FMT) utnyttjar den naturliga och effektiva rullande rörelse i en människas fotsteg, och har efter implementation i hockeyskridskor och inlines visat sig vara framgångsrik. Flow Motion Technology AB vill undersöka om denna teknologi kan implementeras i andra idrottssammanhang för att utvärdera möjligheter att bredda företagets affärsområde. Detta examensarbete är en del av denna undersökning, och i denna rapport beskrivs implementationen av FMT i segmentet alpinskidåkning. Syftet med projektet är att förse Flow Motion Technology AB med underlag för att utvärdera lönsamheten i att investera mer i utvecklingen av FMT riktad mot alpinskidåkning. FMT implementeras i projektet i en raceplatta, en komponent monterad mellan skida och bindning. Arbetet är uppdelat i två delar; utveckling och tillverkning av en funktionsprototyp med detaljerad beskrivning av tillvägagångssätt och metoder, samt tester av prototypens vibrationsdämpande prestanda i labbmiljö med tillhörande analys av resultat. Initiala tester utförs även i fält med enklare analys av resultat. En befintlig bindningsplatta avsedd för tävling testas parallellt med den utvecklade plattan och används som referens vid analys av resultaten. Resultaten visar att plattan implementerad med FMT dämpade en skidas vibrationer i genomsnitt 27 % snabbare än vad referensplattan gjorde vid de tre dämpningsintervall som specificerats för testen i labbmiljö. En statistiskt signifikant skillnad i alla tre fall. Den uppmätta maxamplituden för accelerationen i vibrationerna var även statistiskt signifikant lägre för skidan implementerad med FMT jämfört med referensplattan. Egenfrekvenserna uppmätta i labb påverkades inte nämnvärt om skidan var monterad med FMT-plattan eller referensplattan. De egenfrekvenser som uppmättes i fält motsvarade generellt de som uppmättes i labb med skillnaden att de var förskjutna till att i genomsnitt vara 7 Hz högre.
14
SQUIRES, JACQUELINE ELAINE. "Designing with Technology: Challenging the Perception of the Building Skin." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1212027797.
Full text
15
Sahar, Bolourian. "Ska jag vara ärlig?" Thesis, Malmö universitet, Fakulteten för teknik och samhälle (TS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20710.
Full text
16
Wikerman, Fredrik. "Characterisation of alpine skis." Thesis, KTH, Lättkonstruktioner, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-203338.
Full textAbstract:
Skiing is a fast and competitive sport where skiers must push their performance limit to win medals, the di↵erence can be within hundreds of a second. Therefore, technical improvements are essential for assisting in the skier’s improvement. This thesis project is a joint project between KTH and the Swedish Ski Association and Swedish Ski Team with the purpose of obtaining a better understanding of the structural properties of alpine skis, aiming to improve the individual selection process of skis for the Swedish World Cup Skiers. The goal of the project is to develop and evaluate a method to characterize alpine skis in form of two main structural properties related to the ski characteristics, bending and torsion sti↵ness. An optical measurement device and image post-processing and analysis is used to determine the deflection and twist of skis, which are used to determine the bending and torsional sti↵ness. The method provides, a structural property variation over the whole ski length compared to the existing ISO standard where only a spring coefficient of the skis main parts is determined, which is insufficient for a good over all comparison. The method could be further used in several aspects to help the Swedish World Cup skiers win more medals. It can be used to help in the selection process of new skis for the next season where an objective comparison between models can be done, as oppose to today when the selection process is highly subjective. Skiers usually vary the ski plate constellation and the method could help skiers with their race preparations, like changing the constellation of the ski plate to optimize the sti↵ness for a specific race condition with engineering knowledge rather than just trusting the feeling. The use of this method can reduce the number of ski tests performed by the skier, thus leaving more time for practice. Testing skis in a laboratory environment also increases objectivity in testing and can therefore give the Swedish Ski Association and Swedish skiers a competitive advantage in upcoming competitions.
17
Silva, K. K. M. Buddhika Dilusha. "Optical coherence tomography : technology enhancements and novel applications." University of Western Australia. School of Electrical, Electronic and Computer Engineering, 2004. http://theses.library.uwa.edu.au/adt-WU2005.0087.
Full textAbstract:
In the last fifteen years, a great deal of effort has been put forth, worldwide, for investigating and enhancing various aspects of optical coherence tomography (OCT). This thesis begins with a description of the technique of OCT, and an analysis of its underlying theory. The design and construction of an OCT system is described, with particular emphasis on a novel delay scanning method, and novel signal processing. Application of OCT to non-destructive characterisation of seeds, examination of skin lesions, measurement of fluid flow, and refractive index determination, are then demonstrated. Two technological enhancements to OCT are presented in this thesis. The first, an extended-range Fourier domain optical delay line (FDODL), extends the scan range of the traditional FDODL by a factor of almost 9, by scanning the galvanometer mirror around the region of zero tilt-angle. Polarisation optics are used to prevent light coupling back into the interferometer after only a single pass through the FDODL. A non-coplanar version of the FDODL is also presented, which overcomes the losses associated with the polarisation-based design, but trades off scan range to do so. Both versions of FDODL demonstrated excellent linearity and scan uniformity. The second technology presented here, bifocal optical coherence refractometry (BOCR), affords OCT the ability to measure refractive indices within turbid media. It achieves this by generating two confocal gates within the sample. From knowledge of the system parameters, and measurements of the confocal gate separation, the refractive index within the medium is evaluated to within ±0.01. Refractive index mapping is then demonstrated in a number of turbid samples. Three other applications of OCT are also demonstrated in this thesis. The first is the use of OCT to measure full thickness in lupin seeds. Although OCT could not penetrate the entire thickness of the hull, it is demonstrated that the variation in thickness of the two layers observed with OCT, explained 81% of the variation in thickness of the entire hull measured under a SEM. OCT was then applied, for what is believed to be the first time, in a large scale seed screening program. The second application is a preliminary investigation of the suitability of OCT to aid in the diagnosis of skin lesions. Although our system did not possess sufficient positioning accuracy to enable a direct one-to-one comparison between OCT and histology, a number of correspondences between OCT and histology images were demonstrated. The final application of OCT demonstrated here is a novel phase-locked-loop based demodulation scheme, to perform Doppler OCT. This demodulation scheme demonstrated a dynamic range of 98dB, a velocity range of ±20mm/s, and velocity resolution of 0.5mm/s. Using this system, laminar flow was demonstrated in milk flowing through a capillary tube.
18
Kalic, Remzija, and Souad Zetterberg. "Hur ska man förbättra kommunikationen kring globala kontrakt?" Thesis, KTH, Tillämpad maskinteknik (KTH Södertälje), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-33112.
Full text
19
Howell, Brandon George. "Gene expression profiling of UV-induced skin cancer using cDNA microarray technology." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63108.pdf.
Full text
20
Amissah, Justina. "Bioactive properties of salmon skin protein hydrolysates." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110706.
Full textAbstract:
Atlantic salmon (Salmo salar) skin was hydrolyzed separately with three different enzymes, trypsin, α-chymotrypsin and papain, for two different times (2 and 4 h). The crude hydrolysates and unhydrolyzed soluble skin proteins were screened for antioxidant, antimicrobial and trypsin inhibitory properties. The antioxidant tests used, - namely, DPPH radical scavenging, metal chelation and reducing power assays, - showed that all hydrolysates and soluble proteins at 2mg/ml possessed antioxidant properties. The trypsin inhibitory tests revealed that at 1mg/mL the hydrolysates obtained from trypsin and α-chymotrypsin digestion activated trypsin instead of inhibiting it. All hydrolysates and unhydrolyzed soluble skin proteins showed no inhibitory effect towards E.coli K12, Staphylococcus aureus and Bacillus cereus. Analysis of variance (ANOVA) was used in determining significance in differences between the bioactive properties of the different enzyme treatments. A pair wise comparison of the various bioactive properties expressed, revealed that there was no significant difference between hydrolysates with respect to time of hydrolysis (2 and 4 h). The enzyme hydrolysates however; showed significantly different metal chelating and DPPH radical scavenging potential.The results showed a potential for enzyme hydrolyzed salmon skin proteins to be used as antioxidants and protease activators under selected conditions.<br>Des peaux de saumon atlantique (Salmo salar Linnaeus, 1758) furent hydrolysées séparément avec l'un de trois enzymes (trypsine, α-chymotrypsine, ou papaïne), pour des durées de 2 ou 4 heures. Les hydrolysats bruts et les protéines de peau solubles mais non-hydrolysées furent évalués quant à leurs propriétés anti-oxydantes, antibactériennes, et leur activité inhibitrice vis-à-vis la trypsine. L'évaluation de l'activité antioxydante, soit par piégeage des radicaux par diphényl picryl hydrazyle, chélation d'ions métalliques, ou par essais du pouvoir réducteur, démontra qu'à une concentration de 2 mg mL-1 tous les hydrolysats et protéines solubles possédaient des activités anti-oxydantes. Les essais d'inhibition de la trypsine indiquèrent qu'à une concentration de 1 mg mL-1 les hydrolysats provenant d'une digestion à la trypsine ou à la α-chymotrypsine activèrent plutôt qu'inhibèrent l'action de la trypsine. Ni l'ensemble des hydrolysats, ni les protéines de peau solubles ralentirent la croissance de Escherichia coli K12, Staphylococcus aureus ou Bacillus cereus. Une analyse de la variance (ANOVA) servit à établir le niveau de signification des différences entre les propriétés bioactives des différents traitements enzymatiques. Une comparaison appariée des différentes propriétés bioactives rencontrées, indiqua qu'aucune différence n'existait entre différents hydrolysats quant à l'effet de la durée de l'hydrolyse (2 h vs. 4 h). Cependant, ces hydrolysats présentèrent différents potentiels de piégeage des radicaux par diphényl picryl hydrazyle, et de chélation des ions métalliques. Les résultats indiquent le potentiel d'utiliser des hydrolysats enzymatiques de peau de saumon comme anti-oxydants dans la nourriture et comme activateur de protéases sous certaines conditions.
21
Conover, Susan (Susan Teresa). "Prime areas for improvement in skin cancer detection and how technology can help." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/105308.
Full textAbstract:
Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, Engineering Systems Division, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 138-148).<br>About 5 million cases of skin cancer will be diagnosed in the United States in 2015, making skin cancer the most common cancer diagnosis in the United States. About 13,000 Americans will die from skin cancer in 2015. Often skin cancers are diagnosed at later stages, are expensive to treat, and result in fatalities. For melanoma, responsible for 75% of skin cancer deaths, the overall 5-year survival rate is 98% for skin lesions detected in their early stages, and this survival rate drops to 16% after the disease has spread to other organs. If these fatal skin cancers were detected earlier they would cost less to treat and result in better patient outcomes. There is no single resource available that maps the full state of the skin cancer care delivery, and most current views are colored by a stakeholder's perspective. We connected with stakeholders at different levels of the skin cancer care delivery system to create an overall picture of the system's current state and to identify gaps in care. We interviewed 9 skin cancer patients, 8 primary care physicians, and 9 dermatologists. Through this research, we discovered that the structure of how skin cancer care is delivered promotes opportunities to miss skin cancers and includes many barriers between initial cancer suspicion and disease diagnosis. Frequently patients do not evaluate themselves for skin cancer, primary care physicians have low accuracy in identifying skin cancers, and dermatologists manage a very small portion of the population who develop skin cancers. At a higher level, feedback between patients and physicians is frequently lost in the system, physicians are not accountable for patient outcomes, and patient health is not supported by the system until the patient identifies a health issue and acts to remedy the issue. To close these system gaps, we identified technologies, including micro-biopsies and electrical impedance spectrometry, which could be used to improve rates of skin cancer identification and promote better patient health outcomes. Additionally, we recommend physicians find a way to collaborate on cases, identify their own weaknesses in assessment, and capture patient outcomes to relay incorrect assessments to other physicians to improve future patient care.<br>by Susan Conover.<br>S.M. in Engineering and Management
22
Rajendran, Saranya. "Biologically active protein hydrolysates from dogfish «Squalus acanthias» skin." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=117208.
Full textAbstract:
In this study, dogfish (Squalus acanthias) skins were hydrolyzed with three different proteases, α-chymotrypsin, trypsin and papain, and evaluated for antioxidant, antimicrobial and enzyme inhibitory effects. The protein hydrolysates were produced by treating the skins with 1% enzyme for 4 h at 37˚C, followed by ultrafiltration using 10 kDa ultra filtration membranes. The antioxidant capacity of the hydrolysates based on their IC50 values for the α-Chymotrypsin treated protein hydrolysate (CPH) were calculated as 0.095 mg/mL, 0.116 mg/mL and 0.349 mg/mL, for superoxide anion scavenging, hydroxyl radical scavenging and metal ion chelating power, respectively; the corresponding values obtained with the trypsin treated protein hydrolysate (TPH) were 0.198 mg/mL, 0.186 mg/mL and 0.211 mg/mL; and the values for the papain treated protein hydrolysate (PPH) were 4.388 mg/mL, 0.096 mg/mL and 0.286 mg/ml, respectively. A reducing power of 0.5 was achieved with 0.940 mg/mL PPH, 1.083 mg/mL CPH and 3.70 mg/ml TPH. Initial antimicrobial testing with DH5α -E.coli, Lactococcus lactis and Bacillus subtilis with polymyxin B as positive control did not appear to have any antimicrobial activity by CPH, TPH and PPH. With the presence of these three hydrolysates survival of these probiotic bacteria (Lactococcus lactis and Bacillus subtilis) increased compared to their negative control. At 0.35mg/mL CPH produced 65% of inhibition against porcine pancreatic lipase, while TPH and PPH appeared to be enhancing the enzyme activity. At 40μg/mL, the inhibition (%) of α-chymotrypsin by the three hydrolysates was 32.5% (CPH), 16.4% (TPH) and 8.5% (PPH). The present study shows that enzymatically produced protein hydrolysates from dogfish skin have antioxidant and enzyme inhibitory properties as well as potential to improve probiotic bacteria survival. Further studies are needed to explore the antimicrobial effects, and to characterize the individual peptides in the hydrolysates to verify their potential as food processing aids.<br>Dans cette étude, trois différents enzymes protéolytiques, soit α-chymotrypsine, trypsine, et papaine, ont été utilisés pour hydrolyser des échantillons de peau provenant d'aiguillat commun (Squalus acanthias). Les activités antioxidante, antimicrobienne et inhibitrice ont été mesurées sur les hydrolysats ainsi obtenus. Les réactions protéolytiques ont été conduites en traitant les échantillons de peau avec une concentration dènzyme de 1 % durant 4 heures à 37oC, suivi d'ultrafiltration sur membranes 10 kDa. La capacité antioxidante des hydrolysats par α-chymotrypsine (CPH), basé sur les valeurs IC50 a été calculée comme suit : 0.095 mg/mL, 0.116 mg/mL et 0.349 mg/mL, respectivement envers l'anion superoxide, le radical hydroxyle, et pour le pouvoir de chélation minérale. Ces mêmes valeurs dans le cas des hydrolysats par trypsine (TPH) étaient respectivement de 0.198 mg/mL, 0.186 mg/mL et 0.211 mg/mL. Enfin, pour les hydrolysats par papaïne (PPH), des résultats correspondants de 4.388 mg/mL, 0.096 mg/mL et 0.286 mg/ml ont été mesurés. L'atteinte d`un pouvoir réducteur de 0.5 a exigé les concentrations suivantes de chaque hydrolysat: 0.940 mg/mL de PPH, 1.083 mg/mL de CPH et 3.70 mg/ml de TPH. Nos essais initiaux d`activité antimicrobienne DH5- E.coli, Lactococcus lactis et Bacillus subtilis avec polymyxine B comme témoin positif, n`ont mis aucune activité en évidence. En présence de chacun de ces trois hydrolysats, le taux de survie des bactéries probiotiques (Lactococcus lactis et Bacillus subtilis) a augmenté par rapport au témoin négatif. Pour une concentration de 0.35mg/mL le CPH a montré un taux d`inhibition de 65% envers la lipase pancréatique du porc, alors que TPH et PPH ont plutôt favorisé l`activité de cet enzyme. A 40μg/mL, le % d`inhibition de l'α-chymotrypsine observé pour ces trois hydrolysats était de 32.5% (CPH), 16.4% (TPH) et 8.5% (PPH). La présente étude a démontré que les hydrolysats protéiques obtenus à partir de la peau d`aiguillat par voie enzymatique possèdent des propriétés antioxidantes et inhibitrices, de même qu'une capactié à augmenter le taux de survie de certaines bactéries probiotiques. Des travaux supplémentaires sont requis afin de caractériser les peptides constitutifs de ces hydrolysats et également leurs effets antimicrobiens spécifiques; ceci permettra dèn valider le potentiel comme bioadditifs en transformation alimentaire.
23
George, Maryan. "Adrenaline releases level on skin-to skin touches." Thesis, Högskolan i Skövde, Institutionen för hälsovetenskaper, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-19090.
Full textAbstract:
Human pleasant touches promote feelings of security, supportiveness, and wellbeing. Conversely, human unpleasant touches promote the body for either “fight or flight” or “short term acute stress” during emergencies, feeling of stress or danger. The promoted stress response is released from the hypothalamus by the sympathetic nerve system further to the spinal cord to reach the signals to the adrenal medulla, where stress hormones adrenaline is released. Adrenaline, which is characterized by a mimic sympathetic nerve system, interacts with α and β receptors on different organs. The aim for this study was to investigate whether the stroker (partner/stranger) touch effects on adrenaline hormone releases. The null hypothesis for this study entails a significant adrenaline reduction in partners’ touches compared with strangers’ touches. Indirect competitive ELISA method was used, and concentration data of a total of sixteen participants was obtained. Whitney-U test was carried out to compare group differences within stroker (stranger/partner) touches and adrenaline releasing level. In addition, correlation in adrenaline with noradrenaline and oxytocin hormones was obtained using Spearman’s correlation test. The significant p-value 0.05 was conducted. The result of this study showed no differences between stroker (partner/stranger) associated with adrenaline hormone release. Correlation between partner maximum (max) concentration data for both oxytocin and adrenaline had significant differences. However, max variables for adrenaline and noradrenaline within stroker did not show significant differences. The conclusion of this study is that the gentle touch stimulus used in this study was not enough to detect stress hormone in adrenaline.
24
Ergeer, Emilia. "Ska vi sponsra en podcast?" Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20570.
Full textAbstract:
År 2007 undersökte Haygood reklam i amerikanska podcasts för att ta reda på dess mönster, och år 2010 valde McGowan att göra en liknande studie för att ta reda på om Haygoods teorier fortfarande stämde. Det visade sig att Haygoods teorier fortfarande var aktuella och på så vis hade teorierna hållit över en längre tid. Därmed är denna studiens syfte att undersöka om de amerikanska reklammönsterna går att applicera på reklam i svenska podcasts, trots att Sverige har fler lagar än USA kring hur reklam får framföras. Vidare kommer studien att undersöka lyssnarens attityd till reklam i podcasts, detta för att ta reda på vad lyssnaren anser om podcastreklams utformning och placering. Studien är genomförd med både en kvantitativ- och en kvalitativ metod. För att undersöka reklammönstret i svenska podcasts tillämpades en kvantitativ metod där podcasts på iTunes topp tio studerades under sex veckor. Samtliga podcasts analyserades och dokumenterades och jämfördes därefter med resultatet från McGowans studie (2010), då denna studien är den senare. Resultatet visade att the bookend effect (sv. bokstödseffekten) också finns i svenska podcasts, den förekommer däremot mer i amerikanska podcasts. Hur reklamen framförs påminner också om den amerikanska, exempelvis ”Vi är denna veckan sponsrade av…” kan liknas med ”Support for this podcast comes from...”. Andra reklammönster som går att applicera på svensk podcastreklam är självförsörjandereklam och återkommande sponsorer. För att undersöka lyssnarens attityd till podcastreklam tillämpades en kvalitativ metod i form av individuella intervjuer. Respondenterna fick lyssna på reklamutdrag från de undersökta podcasts och därefter svara på frågor kring reklamen. Det framkom att reklam är störande oavsett dess utformning och placering. Sponsrat prat, det vill säga när programledaren själv pratar, föredras framför traditionella reklamavbrott. Respondenterna föredrog att reklamen kom i början på avsnittet men att reklam i mitten var ok om det var sponsrat prat. Detta berodde på att de inte kände sig lika avbrutna med sponsrat prat som med exempelvis traditionellt reklamavbrott.<br>In 2007, Haygood examined US podcast ads to find out its pattern, and in 2010 McGowan chose to do a similar study to find out if Haygood's theories were still correct. It turned out thatHaygood's theories were still up to date and thus the theories had lasted for a long time. Therefore, this study's purpose is to investigate whether the U.S. advertising patterns can beapplied to advertisements in Swedish podcasts, even though Sweden have more laws than the US on how to advertise. In addition, the study will investigate the listener’s attitude towards advertising in podcasts, to find out what the listener considers about ad type and its placement in podcasts. This study was conducted through a combination of quantitative and qualitative methodology. To examine advertising patterns in Swedish podcasts, a quantitative method was applied, and podcasts on iTunes top ten were studied for six weeks. All podcasts were analyzed and documented and then compared with the results from McGowan's study (2010), since this one is the latest. The result showed that the bookend effect also exists in Swedish podcasts, however it appears more in US podcasts. How the advertisement is performed is also similar to the US podcasts, for example, "We’re this week sponsored by..." is similar to "Support for this podcast comes from...". Other advertising patterns that can be applied to Swedish podcasts are selfsufficient advertisements and recurring sponsors. To investigate the listener’s attitude towards podcast advertising, a qualitative method was used in the form of individual interviews. Respondents listened to a selection of advertisements from the top ten on iTunes, and was then interviewed about the advertisements. It was found that advertising is disturbing regardless of its type and placement. Sponsorship, when the program leader speaks, is preferred over traditional advertising. It is also preferred that the advertisement is placed in the beginning of a podcast, but sponsorship can make advertising placed in the middle of a podcast ok, because it can feel less interrupting with sponsorship compared to traditional advertisement.
25
Choi, Won Seon 1975. "Involvement of TGF-beta in skin photoaging." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33842.
Full textAbstract:
Thesis (Ph. D.)--Harvard-MIT Division of Health Sciences and Technology, 2005.<br>Vita.<br>Includes bibliographical references.<br>The goal of this thesis study was to understand the role of TGF-[beta] in skin photoaging, especially in solar elastosis. Solar elastosis, the accumulation of elastotic material in the dermal extracelluar matrix, is a major hallmark of photoaging. However, the mechanisms by which UV radiation causes solar elastosis are poorly understood. TGF-[beta] is a multifunctional cytokine involved in the regulation of extracelluar matrix and is known to be up-regulated by UVR. Involvement of reactive oxygen species (ROS) in the development of solar elastosis has been demonstrated by many studies using antioxidants and anti-inflammatory agents in the mouse skin in vivo. We hypothesized that ROS produced by TGF-[beta] are key components in the tropoelastin (TE, a soluble precursor of elastin) up-regulation in dermal fibroblasts, and that TGF-[beta] is a major regulator in the photoaging processes. Using human skin fibroblasts system in vitro, we found that ROS generated from NADPH oxidase and mitochondria are involved in the TGF-[beta] induced elastin production, and intracellular sources of ROS vary with time. We showed that both Smad and non-Smad pathways, e.g. MAPK and PKC pathways, are required for TE mRNA up-regulation by TGF-[beta].<br>(cont.) However, ROS were not involved in some of the important steps in these pathways, such as phosphorylations of p38 or ERK or Smad2, suggesting that ROS acts downstream of these pathways. The in vivo chronic UVB irradiation study using a Skh- 1 hairless mouse model with a small molecule inhibitor for the TGF-[beta] type I receptor showed that the TGF-[beta] receptor inhibitor increased the number of mast cells, but decreased the levels of active TGF-[beta] protein, and mRNA levels for collagen III and IV, MMP-2 and 9, and TE in the chronically UVB irradiated mouse skin. However, those responses did not result in the changes in the collagen and elastin content, or the wrinkle formation. Overall, this work indicates that TGF-[beta] contributes to the solar elastosis, through the effects on the TE mRNA level in skin. Implication of this role of TGF-[beta] in the elastin fiber deposition or visible changes of photoaged skin requires further investigation.<br>by Won Seon Choi.<br>Ph.D.
26
Midol, Alain. "Approche analytique de contributions scientifiques à la performance sportive : application au ski de vitesse." Lyon 1, 1987. http://www.theses.fr/1987LYO10121.
Full text
27
Carruthers, Seth Blue. "Integral-skin formation in hollow fiber membranes for gas separations." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3036162.
Full text
28
Fredh, Christian, and Erik Norström. "Datalagring i SharePoint : Hur ska utvecklaren välja lagringsmetod?" Thesis, Högskolan i Borås, Institutionen Handels- och IT-högskolan, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-18858.
Full textAbstract:
I processen att utveckla nya funktioner i ett SharePoint-baserat system måste utvecklarenvälja vilken datalagringsmetod som ska användas. Det finns två primära metoder attanvända sig av när data ska lagras i SharePoint. Den första är att använda SharePointsinbyggda listor. Den andra är att använda en egenutvecklad databas att arbeta mot.Vi har i studien undersökt de båda metoderna och studerat litteratur för att ta fram viktigaaspekter som bör beaktas vid val av datalagringsmetod. De aspekter vi tagit fram är;snabbhet, underhåll, flexibilitet, dataintegritet, redundans, tillgänglighet, säkerhet ochenkelt att utveckla i. Dessa aspekter har legat till grund för de jämförelser vi gjort.Vi har genomfört en kvantitativ studie i form av ett experiment där vi har undersökt detvå metoderna med avseende på aspekten snabbhet. Vi har även genomfört en kvalitativstudie, där vi intervjuat en expert inom SharePoint-området.Från den kvantitativa studien kan vi visa på att använda en separat databas är påtagligtsnabbare än att använda listor, metoden att använda en separat databas är även bättre påatt hantera stora datamängder.Från den kvalitativa studien kan vi bland annat visa på att en lösning med egenutveckladdatabas är svårare att underhålla än om lösningen använder sig av listor. Från enutvecklares perspektiv är det även enklare att använda listor med tanke på all denfunktionalitet som redan finns inbyggd i listorna. En annan fördel med listorna är att detär enklare att interagera med andra delar i SharePoint om lösningen använder listor fördatalagring.Vi kan inte entydigt säga att en metod är bättre än den andra utan det ärsituationsberoende och utvecklaren måste göra ett aktivt val av metod. Vi anser dock attman i de flesta situationer bör använda listor för datalagring i SharePoint. Detta är främstpå grund av att det finns mycket färdigutvecklat om man använder listor samt att det blirlättare att underhålla ett system som bygger på listor.<br>Uppsatsnivå: C
29
Fox, Lizelle Triféna. "PheroidTM technology for the topical application of selected cosmeceutical actives / Lizelle Triféna Fox." Thesis, North-West University, 2008. http://hdl.handle.net/10394/3623.
Full textAbstract:
Aging can be described as an extremely complex occurrence from which no organism can be excluded. Intrinsic and extrinsic aging make out the two components of skin aging and they differ on the macromolecular level while sharing specific molecular characteristics which include elevated levels of reactive oxygen species (ROS) and matrix metalloproteinase (MMP) while collagen synthesis decreases.
The skin functions as a protective barrier against the harsh environment and is essential for regulating body temperature. The stratum corneum (SC) is responsible for the main resistance to the penetration of most compounds; nevertheless the skin represents as an appropriate target for delivery. The target site for anti-aging treatment includes the epidermal and dermal layers of the skin.
Calendula oil and L-carnitine L-tartrate was utilised as the cosmeceutical actives as they can be classified as a mixed category of compounds/products that lie between cosmetics and drugs. Both show excellent properties which can prove valuable during anti-aging treatment, whether it is due to the scavenging of ROS (calendula oil), moisturising effects (calendula oil and L-carnitine L-tartrate) or the improvement of the skin turnover rate (L-carnitine L-tartrate).
The Pheroid™ delivery system can enhance the absorption of a selection of active ingredients. The aim of this study was to determine whether the Pheroid™ delivery system will enhance the flux and/or delivery of the named actives to the target site by performing Franz cell diffusion studies over an 8 h period, followed by tape stripping experiments. The Pheroid™ results of the actives were compared to the results obtained when 1 00 % calendula oil was applied and the L-carnitine L-tartrate was dissolved in phosphate buffer solution (PBS), respectively.
In the case of calendula oil only a qualitative gas chromatography mass spectrometry (GC/MS) method could be employed. No calendula oil was observed to permeate through the skin, but linoleic acid (marker compound) was present in the epidermis and dermis layers. Components in the Pheroid™ delivery system hampered the results as the marker compound identified is a fundamental component of the Pheroid™, making it difficult to determine whether or not the Pheroid™ delivery system enhanced calendula oil's penetration.
The aqueous solubility and log D partition coefficient of L-carnitine L-tartrate was determined. Inspection of the log D value of -1.35 indicated that the compound is unfavourable to penetrate the skin, whereas the aqueous solubility of 16.63 mg/ml in PBS at a temperature of 32º C indicated favourable penetration.
During the Franz cell diffusion and tape stripping studies it was determined by liquid chromatography mass spectrometry (LC/MS) that carnitine may be inherent to human skin. Pheroid™ enhanced the flux (average of 0.0361 µg/cm2.h, median of 0.0393 µg/cm2.h) of the L-carnitine L-tartrate when compared to PBS (average of 0.0180 µg/cm2.h, median of 0.0142 µg/cm2.h ) for the time interval of 2 -8 h. The PBS was more effective in delivering the active to the target site (0.270 µg/ml in the epidermis and 2.403 µg/ml in the dermis) than Pheroid™ (0.111 µg/ml and 1.641 µg/ml in the epidermis and dermis respectively).
Confocal laser scanning microscopy (CLSM) confirmed the entrapment of L-carnitine L-tartrate in the Pheroid™ vesicle, while in the case of calendula oil it was impossible to differentiate between the oil and the Pheroid™ components.<br>Thesis (M.Sc. (Pharmaceutics))--North-West University, Potchefstroom Campus, 2009.
30
黃鷺新 and Luxin Huang. "The new industrial space into the 21st century: the hi-tech industrial development and its spatialstrategy in Shenzhen." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31260524.
Full text
31
Boenisch, Kurt P. Cervantes Hector A. Clark Andrew J. Espe Jesse G. Lohrke Erik B. "A cost effectiveness analysis of using alternate materials for non-skid in shipboard applications /." Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2003. http://library.nps.navy.mil/uhtbin/hyperion-image/03Jun%5FBoenisch.pdf.
Full textAbstract:
Thesis (M.B.A.)--Naval Postgraduate School, June 2003.<br>"MBA professional report."--Cover. Joint authors: Kurt P. Boenisch, Hector A. Cervantes, Andrew J. Clark IV, Jesse G. Espe, and Erik B. Lohrke. Thesis advisor(s): John Mutty, Raymond Franck. Includes bibliographical references (p. 61-62). Also available online.
32
Van, Dyk Christina Petronella. "Transdermal delivery of 5-Fluorouracil with PheroidTM technology / C.P. van Dyk." Thesis, North-West University, 2008. http://hdl.handle.net/10394/1905.
Full text
33
Holst, Daniel. "Real-time rendering of subsurface scattering and skin." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-139938.
Full text
34
Samuelsson, Emil. "Classification of skin pixels in images : Using feature recognition and threshold segmentation." Thesis, Umeå universitet, Institutionen för datavetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-155400.
Full textAbstract:
The purpose of this report is to investigate and answer the research question: How can current skin segmentation thresholding methods be improved in terms of precision, accuracy, and efficiency by using feature recognition, pre- and post-processing? In this work, a novel algorithm is presented for classification of skin pixels in images. Different pre-processing methods were evaluated to improve the overall performance of the algorithm. Mainly, the methods of image smoothing, and histogram equalization were tested. Using a Gaussian kernel and contrast limited adaptive histogram equalization (CLAHE) was found to give the best result. A face recognition technique based on learned face features were used to identify a skin color range for each image. Threshold segmentation was then used, based on the obtained skin color range, to extract a skin map for each image. The skin maps were improved by testing a morphology method called closing and by using contour detection for an elimination of large false skin structures within skin regions. The skin maps were then evaluated by calculating the precision, recall, accuracy, and f-measure using a ground truth dataset called Pratheepan. This novel approach was compared to previous work in the field and obtained a considerable higher result. Thus, the algorithm is an improvement compared to previous work within the field.
35
Farah, Ariane. "Digital technology used in the application of colour measurement and colour formulation of skin in maxillofacial prosthetics." Thesis, King's College London (University of London), 2018. https://kclpure.kcl.ac.uk/portal/en/theses/digital-technology-used-in-the-application-of-colour-measurement-and-colour-formulation-of-skin-in-maxillofacial-prosthetics(e5741393-bf96-4ff0-8761-999010942ef5).html.
Full textAbstract:
Statement of problem: Colour degradation and deterioration of mechanical properties of maxillofacial prostheses requires their frequent renewal; and the traditional trial and error method of colour matching natural skin with silicone elastomer is unpredictable and requires a more scientific approach. Materials and methods: For colour stability and mechanical properties testing, M511 silicone was coloured with Spectromatch Pro colourants and stored in darkness, exposed to accelerated ageing and outdoor weathering. Test groups included non-pigmented, individually pigmented samples and Caucasian skin tone coloured specimens. Investigations further involved the use of UV-light absorbers and silicone surface sealants to improve the colour stability of elastomer. For assessment of the Spectromatch Pro colour formulation software in comparison with the traditional colour matching method, the same elastomer and colourants were utilised. Colour measurements of skin and elastomer were recorded utilising a spectrophotometer and mean colour differences (∆E) were calculated based on the recorded L*a*b* values. All data was analysed using linear mixed models and Šídák’s multiple comparison of means test (α = 0.05). Results: There was a significant effect of time and environment on colour and mechanical properties of elastomer (p = 0.001), apart from tear strength which was not significantly different. Greatest ∆E were observed for specimens exposed to accelerated ageing. Caucasian skin coloured samples demonstrated ∆E of 3.26; but application of a surface sealant with incorporated UV-light absorber improved its colour stability (1.56 ∆E). Use of the Spectromatch Pro colour formulation software resulted in better colour matching results than did the traditional method; with non-perceivable ∆E of 0.79 for Afro/Afro-Caribbean subjects and perceivable but acceptable ∆E of 1.46 for Caucasian skin tones. Conclusions: M511 in conjunction with Spectromatch Pro colourants demonstrated good overall colour stability; and the Spectromatch Pro software achieved best colour matching results and makes these systems suitable for daily clinical use.
36
Englund, Rickard. "Ultrasound Surface Extraction for Advanced Skin Rendering." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-98681.
Full textAbstract:
This report evaluates possibilities to combine volumetric ultrasound (us) data together with the recent work published on advanced skin rendering techniques. We focus mainly on how to filter us data and localize surfaces within us data. We also evaluate recent skin rendering techniques in order to have a good understanding of what is needed from the us for rendering realistic skin. us data is acquired using sonography and have a low signal-to-noise ratio by nature, this makes it harder to extract surfaces compared to other medical data acquisition methods such as ct and mr. This report present an algorithm which implements a variational classification technique to emphasize surfaces within us and using a rbf network to fit an implicit function to these surfaces. Using this approach presented we have successfully extract smooth meshes from the noisy us data.
37
Persson, Jerker. "Broarbeten : finns det behov av dem i insatsförsvaret och hur ska broarbeten kunna skyddas?" Thesis, Försvarshögskolan, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-1877.
Full textAbstract:
C-uppsats som behandlar vilken framtida förmåga till broarbeten som FM har behov av och vilka alternativa metoderför hur broarbeten kan skyddas i en framtida insatsmiljö.Syftet med uppsatsen är att studera vilka behov av flytbroförmåga som kommer att finnas inom insatsförsvaret ochvilka krav den framtida insatsmiljön ställer. Vidare föreslås en lösning för skydd av flytbroarbeten.Den av FM beskrivna studiemetodiken används i tillämpad form. Först inhämtas bakgrundsinformation. Där beskrivsvilket behov av broarbeten som kan identifieras. Vidare beskrivs vilka krav som en framtida insatsmiljö kan ställa ochvilken teknikutveckling som kan förutspås. Därefter utformas ett antal alternativ för att skydda broarbeten.Alternativen jämförs och slutsatser av detta dras. Slutligen föreslås en lösning för skydd av broarbeten och fortsattarbete.Skyddet föreslås bestå av en kombination av de olika alternativen. De inom FM befintliga förmågorna brukas inomramen för det nätverksbaserade försvaret. Genom att tillämpa signaturanpassningsteknik och multispektralvattendimma samt använda skenmål kan broarbeten komma till verkan i framtiden. Som flytbrosystem föreslås DB200 fortsatt kunna lösa de operativa behoven, men flytbrosystemet M 3 ökar ytterligare sannolikheten för överlevnadoch därmed verkan. Förmågan att ha kännedom främst om egen elektromagnetisk signatur krävs, men ävenmöjligheten att snabbt och överraskande bygga nya tillfarter förbättrar skyddet.<br>This thesis investigates what bridging capabilities the Swedish Armed Forces (SwAF) will be requiring in the future andhow to protect bridging from enemy detection and fire in a future combat situation.The purpose of the thesis is to find out what needs of bridging abilities that will be required in the future and whatrequirements this will lead to in a future combat environment. A suggestion of how to protect bridging from enemydetection and fire will be presented.The method of conducting studies presented by the SwAF will be applied. First, background information will becollected. The need for bridging abilities will be identified and the requirements from future combat environments willbe presented, as well as a possible technical development. Subsequently, a number of alternatives for protectingbridging will be presented. The different alternatives will be compared to each other and conclusions from thecomparisons will be drawn. Finally, a suggestion for a solution of how to protect bridging from destruction andproposals for work to be done will be presented.The suggestion for how to protect bridging will be a combination of the different alternatives. The occurring abilities ofSwAF units will be used within the context of Network-centric Warfare. Using signature management technology,multispectral water fog and decoys will enable bridging in the future. The Ribbon Bridge system will meet futurerequirements, but M 3 bridging equipment will enhance the probability of surviving and being successful. The ability toknow one’s own emission, primarily in the electromagnetic spectrum, as well as the capability of building new accessroads will enhance the protection of bridging.<br>Avdelning: ALB - Slutet Mag 3 C-upps.Hylla: Upps. ChP T 00-02
38
Lumpkins, Sarah B. "Space radiation-induced bystander signaling in 2D and 3D skin tissue models." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/70817.
Full textAbstract:
Thesis (Sc. D.)--Harvard-MIT Program in Health Sciences and Technology, 2012.<br>Page 157 blank. Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 145-156).<br>Space radiation poses a significant hazard to astronauts on long-duration missions, and the low fluences of charged particles characteristic of this field suggest that bystander effects, the phenomenon in which a greater number of cells exhibit damage than expected based on the number of cells traversed by radiation, could be significant contributors to overall cell damage. The purpose of this thesis was to investigate bystander effects due to signaling between different cell types cultured within 2D and 3D tissue architectures. 2D bystander signaling was investigated using a transwell insert system in which normal human fibroblasts (A) and keratinocytes (K) were irradiated with 1 GeV/n protons or iron ions at the NASA Space Radiation Laboratory using doses from either 2 Gy (protons) or 1 Gy (iron ions) down to spacerelevant low fluences. Medium-mediated bystander responses were investigated using three cell signaling combinations. Bystander signaling was also investigated in a 3D model by developing tissue constructs consisting of fibroblasts embedded in a collagen matrix with a keratinocyte epidermal layer. Bystander experiments were conducted by splitting each construct in half and exposing half to radiation then placing the other half in direct contact with the irradiated tissue on a transwell insert. Cell damage was evaluated primarily as formation of foci of the DNA repair-related protein 53BP1. In the 2D system, both protons and iron ions yielded a strong dose dependence for the induction of 53BP1 in irradiated cells, while the magnitudes and time courses of bystander responses were dependent on radiation quality. Furthermore, bystander effects were present in all three cell signaling combinations even at the low proton particle fluences used, suggesting the potential importance of including these effects in cancer risk models for low-dose space radiation exposures. Cells cultured in the 3D constructs exhibited a significant reduction in the percentages of both direct and bystander cells positive for 53BP1 foci, although the qualitative kinetics of DNA damage and repair were similar to those observed in 2D. These results provide evidence that the microenvironment significantly influences intercellular signaling and that cells may be more radioresistant in 3D compared to 2D systems.<br>by Sarah B. Lumpkins.<br>Sc.D.
39
Wiklund, Melina, and Sofia Rosenquist. "Hur reservdelar ska lagerstyras : Framtagning av en lagerstyrningsmodell för Swisslog ABs reservdelssortiment." Thesis, Linköpings universitet, Industriell ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-129732.
Full textAbstract:
Swisslog Group säljer kundanpassade automatiserade intralogistiklösningar och erbjuder sedan service och reservdelar till sina kunder. Det har dock uppmärksammats att kunderna i dagsläget efterfrågar kortare ledtider för dessa reservdelar. Ett sätt att uppnå kortare ledtider är genom ökad lagertillgänglighet för artiklarna på lagret, vilket kan uppnås genom en effektivare lagerstyrning. Detta har lett fram till studiens syfte som är att ta fram en lagerstyrningsmodell som Swisslog Group kan använda för att lagerstyra sitt reservdelssortiment. För att ta fram denna lagerstyrningsmodell skapas först en situationsbeskrivning där en djupare undersökning av hur reservdelshanteringen fungerar på Swisslog Group i nuläget utförs. Därefter konstrueras ett teoretiskt ramverk inom området lagerstyrning samt den särskilda karaktäristik som återfinns hos reservdelar. Situationsbeskrivningen tillsammans med det teoretiska ramverket ligger till grund för den lösningsgång som leder fram till hur studiens syfte ska besvaras. För att kunna följa lösningsgången görs val gällande vilka datainsamlings- och analysmetoder som ska användas. För att säkerställa studiens trovärdighet beskrivs och motiveras de val som görs noggrant. Dessutom läggs fokus på användandet av olika källor och att dessa ställs mot varandra för att hålla ett kritiskt förhållningssätt genom hela arbetets gång. Det första steget i lösningsgången är att ta fram en teoretisk lagerstyrningsmodell för reservdelar. Detta grundar sig i att det finns forskning inom området som är värdefull att ta vara på och därför utförs en fördjupad litteraturstudie inom lagerstyrning av reservdelar. Informationen som framkommer bearbetas och analyseras och ligger till grund för den teoretiska lagerstyrningsmodellen. Den fördjupade litteraturstudien, samt analys av denna, leder fram till att en klassificering av sortimentet måste ske eftersom artiklar ser olika ut och att det är för resurskrävande att styra alla artiklar olika. Klassificeringen leder fram till ett antal klasser som sedan kan lagerstyras på olika sätt. Nästa steg är att se hur väl den teoretiska lagerstyrningsmodellen går att applicera på Swisslog Groups reservdelssortiment. Därför tillämpas modellen på företagets data för att möjliggöra en utvärdering av resultatet. Vid utvärderingen jämförs hur väl modellen presterar med hur företaget presterar under samma tidsperiod. Utvärderingskriterierna är många, men de viktigaste är lagertillgängligheten och de lagerföringskostnader som uppstår. För de delar av modellen där det finns förbättringspotential tas förslag på anpassningar fram och modellen justeras sedan utefter dessa enligt en iterativ process. Detta leder fram till en anpassad lagerstyrningsmodell för Swisslog Group. Den huvudsakliga slutsatsen är att den anpassade lagerstyrningsmodellen medför ökad lagertillgänglighet samt minskade lagerföringskostnader för Swisslog Group. En ökad lagertillgänglighet möjliggör att artikeln finns tillgänglig direkt då kunden efterfrågar den vilket innebär kortare ledtider för kund. Då detta är vad kunderna efterfrågar borde en implementering av modellen därför i förlängningen leda till nöjdare kunder. Ytterligare en fördel är att Swisslog Group, med hjälp av denna modell, kan arbeta mer strukturerat med lagerstyrning. Ett strukturerat arbetssätt ökar företagets kunskaper inom området och kan medföra att mindre resurser behöver läggas på manuell styrning av artiklarna.<br>Swisslog Group offers customized automated intralogistics solutions to its customers all around the world. After implementation Swisslog Group also offers their customers service and the spare parts required for maintaining the plant operational. However, it has been noted that customers are requesting shorter lead times for these spare parts. One way to acquire shorter lead times is to increase the stock availability for spare parts in the central warehouse, which can be achieved by more efficient inventory management. Thus, the purpose of this study is to create an inventory management model adjusted to Swisslog Group’s spare parts assortment. In order to create the inventory management model, a further investigation of the current spare parts management at Swisslog Group is carried out at first. Subsequently, a theoretical framework based on inventory control and specific characteristics of spare parts is developed. These two areas are then combined to specify what specific tasks are needed to create the model and fulfill the assigned purpose. After these tasks are specified the analytic methods and methods for gathering information are explained in detail. To secure the reliability of the study, thorough descriptions and justifications of choices are made. Moreover, a critical approach and usage of a variety of different sources for comparison and analysis has been a key part in the research. When the process of constructing the model begins, it is evident that the theoretical framework is not deep enough to lay a foundation for the model. Therefore, an in depth literature research of spare parts is carried out. The extensive literature research suggests that because of the spare parts characteristics, a classification of the spare parts is required to manage them according to their characteristics. In order to consider all these aspects a theoretical inventory management model is created first. The model includes both a classification scheme and the management principles associated with each type of spare part. In order to fulfill the purpose of the study the model is then adjusted to fit Swisslog Group. To achieve an adjusted model, the theoretical model is applied onto Swisslog Group’s spare parts assortment to enable an assessment of its performance. The result is further analyzed and compared to the current situation mainly regarding stock availability and inventory carrying costs. The adjustments considered for Swisslog Group is then carried out in an iterative process resulting in the final adjusted inventory management model for Swisslog Group. The main conclusion of the study is that using the adjusted inventory management model Swisslog Group could achieve increased stock availability at the same time as the inventory carrying costs are decreased. An increased stock availability implies shorter lead times for the customer as the probability of the spare part being available upon request is higher. As this is what the customers are desiring, an implementation of the model should lead to higher customer satisfaction. Another advantage of the model is that Swisslog Group can work more efficient with inventory control. This could imply that less energy has to be put on developing an individual strategy for each spare part, but instead control them more strategically and gain confidence from both customers and other departments at Swisslog Group.
40
Wibowo, Gatot Morti Chavalit Wongse-ek Manus Mongkolsuk. "Factors affecting image quality and entrance skin exposure when using automatic exposure control (AEC) /." Abstract, 2004. http://mulinet3.li.mahidol.ac.th/thesis/2547/cd370/4537449.pdf.
Full text
41
Löhf, Simon. "”Det ska låta orange” : En kvalitativ studie om musikproducenters arbetsprocesser inom reklamfilmsbranschen." Thesis, Högskolan Dalarna, Ljud- och musikproduktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:du-24554.
Full textAbstract:
I många kulturer så har musikerns roll varit något av vikt, men samtidigt av låg status. Musiker måste ofta hänge sig till olika områden av musicerande för att gå runt och därför är det viktigt att undersöka hur de olika alternativen ser ut. En väg kan vara att para ihop sig med kommersialism och modifiera sitt komponerande efter en beställare som vill betala för musik med avsikt att marknadsföra ett varumärke.Syftet med studien är att få en djupare förståelse av hur tre musikproducenter inom reklamfilmsmusik utför sina uppdrag, förhåller sig till sina beställare och uppfattar reklambranschen. De empiriska resultaten har samlats genom tre semistrukturerade djupintervjuer med producenter från olika arbetssituationer för att få en generaliserad kartläggning av reklambranschen utifrån informanternas perspektiv. Slutsatsen visar ett likartat arbetssätt, där producentens hårdaste arbete ligger i att på ett kommunikativt och diplomatiskt sätt ta reda exakt vad beställarens mål är med produktionen. Vidare är branschuppfattningen optimistisk till hur medvetandet kring musikens funktion har utvecklats positivt, men betänker även att ny teknik och nya aktörer kan komma att begränsa progressionen genom att erbjuda färdigskriven musik till ett lågt pris.
42
Christian, Kimberly Anne. "Rapid rotational foam molding of polyethylene integral-skin foamed core moldings." Thesis, UOIT, 2009. http://hdl.handle.net/10155/35.
Full textAbstract:
This thesis focuses on the design, development, and evolution of a novel patent-pending
plastic processing technology entitled “Rapid Rotational Foam Molding” with special
emphasis on the processing of polyethylene (PE) integral-skin foamed core moldings.
Rapid Rotational Foam Molding is a technology deliberately designed to address the
intrinsic disadvantage of conventional rotational foam molding, i.e., its very long cycle
times. In this context, a physical system that exploits the positive synergistic effects of
innovatively combining extrusion melt compounding and rotational foam molding was
designed and built. The fundamental processing steps of this system comprise (i)
rotationally molding a non-foamable PE powder in a lab-scale oven while, (ii)
simultaneously melt compounding and foaming a pre-dry blended foamable PE and
chemical blowing agent (CBA) formulation in an on-line lab-scale extruder, and then (iii)
filling the newly created foaming material into the non-chilled hollow article thereby
created in the mold through a special interface.
Two varieties of PE resins ranging from linear low density PE (LLDPE) to high
density PE (HDPE) were selected for experimentation with melt flow rates (MFR)
ranging from 2.0 to 3.6 g/10min. The implemented CBA was Celogen OT. The
materials were characterized using thermal analysis techniques such as differential
scanning calorimetery (DSC) and thermogravimetric analysis (TGA) to ensure their
correct operating temperatures ranges. Scanning electron microscopy (SEM) was utilized
for characterizing the quality of the foam samples and achieved skin-foam interface for
the final moldings. Improvements to the achieved molding quality were accomplished
through various system and process modifications described throughout this research
work.
43
Lixenstrand, Linda. "Hur ska vi få personalen att börja använda appen Bra Liv Nära? : En Studie genomförd på Habo vårdcentral." Thesis, Jönköping University, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-53258.
Full text
44
Alexandersson, Anders. "Tungt reaktivt pansar : Hur ska Strv 122 möta hot där pilprojektil inte får genomslag?" Thesis, Försvarshögskolan, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:fhs:diva-1414.
Full textAbstract:
Syftet med undersökningen är att genom en jämförande modellstudie ta fram ett eller flera sätt att nedkämpa en motståndare utrustad med tungt reaktivt pansar. Reaktivt pansar har tidigare endast använts för att hindra RSV-strålar att penetrera pansar. Men teknikutvecklingen har nu medfört att dagens reaktiva pansar utöver skydd mot RSV-strålar också klarar av att reducera pilprojektilens förmåga till penetration. Amerikanarna som tidigt upptäckte att Ryssland hade tillgång till tekniken började direkt utveckla ny ammunition för att möta detta. Men vad har vi gjort i Sverige, sen detta uppdagades? Kan vår Stridsvagn 122 fortfarande lösa sin huvuduppgift: att slå ut andra stridsvagnar? I studien gör författaren antagandet att spårljuspansarprojektil 95 inte får genomslag på en stridsvagn utrustad med tungt reaktivt pansar, typ Kontakt-5. Undersökningen har sin tyngdpunkt i den jämförande modellstudie som skall jämföra tre olika scenarion. Modellstudien föregås av en beskrivande teoridel där bland annat skydd, svensk stridsvagnsammunition och reaktivt pansar beskrivs. Därefter behandlar modellstudien en duellsituation mellan Strv 122 och en motståndare utrustad med Kontakt-5. De olika modellerna jämförs i syfte att ta fram den modellen som är mest fördelaktig då man vill nedkämpa en fiende utrustad med Kontakt-5. Slutsatsen som dras utifrån studien är att normalförfarandet att initialt ha pilprojektil i kanonen bör ändras till att istället ha spränggranat. Spränggranaten kommer att skada Kontakt-5 och skapa en oskyddad yta där pilprojektilen kan få genomslag.<br>The purpose of this essay is to develop one or more ways to neutralize an enemy equipped with heavy reactive armour. Reactive armour has previously only protected against shaped charges. Technological advances have now led to today's reactive armour in addition to protection against shaped charges also capable of protecting against an Armour-Piercing Fin-Stabilized Discarding Sabot (APFSDS). The Americans discovered that this technology was available to the Russians and developed new types of APFSDS to deal with it. But what have we done in Sweden since this technology was discovered? In this essay, the author makes the assumption that the Swedish APFSDS can’t penetrate a tank equipped with reactive armour. A comparative model will compare three different ways to deal with this problem. Before doing the comparative model study, there will be a chapter which describes for example reactive armour, APFSDS, Kontakt-5 (a type of reactive armour), tank protection in general. The model consists of one Leopard 2A5 S (Leo 2) and one enemy tank equipped with reactive armour. By comparing different ways for the Leo 2 to defeat the enemy, the author will reach a conclusion for the problem. The conclusion drawn from this essay is that the normal procedure when the Leo 2 initially has an APFSDS loaded in the canon should be changed to it having a grenade loaded instead. Bursting a grenade towards the enemy will destroy or damage Kontakt-5 and the second projectile, which should be an APFSDS, will now penetrate the damaged Kontakt-5 and the hostile tank will be defeated.
45
Wong, Iok Lan. "Face detection in skin color modeling and template matching." Thesis, University of Macau, 2008. http://umaclib3.umac.mo/record=b1795653.
Full text
46
Ergun, Hazal. "Monitoring Physiological Reactions of Construction Workers in Virtual Environment: A Feasibility Study Using Affective Sensing Technology." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2302.
Full textAbstract:
This research aims to monitor workers’ physiological reactions in virtual construction scenario. With the objective of leveraging affective sensing technology in construction scenario, experiments with Galvanic Skin Response (GSR) was conducted in a 3D simulation developed based on a real construction site. The GSR results obtained from sensor were analyzed in order (i) to assess the feasibility of using virtual environment to generate real emotions, (ii) to examine the relation between questionnaires used to ask people about their experience and their physiological responses and (iii) to identify the factors that affect people’s emotional reactions in virtual environment. Subjects of the experimental group exhibited incoherent responses, as expected in experiments with human subjects. Based on the various reasons for this incoherence obtained from questionnaire part of the experiment, the potential in research for developing training methods with respect to workers’ physiological response capability was identified.
47
Rajamanickam, Rajkumar. "Study of delamination of composite hat skin stringer interface failure." Thesis, Blekinge Tekniska Högskola, Institutionen för maskinteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-18837.
Full textAbstract:
The use of composite materials brought a tremendous breakthrough in the scientific world of aerospace engineering. The lack of understanding of the failure of composite materials can be disastrous. Composite laminated structures need to be thoroughly studied and investigated in the design stage. In this thesis, formed-hat skin stringer made of composite laminates is investigated. Delamination is the most common failure of laminated composites, which has two stages delamination onset and delamination propagation. In the preliminary design phase, firstly the structures need to be investigated for low-velocity impact to check the formation of damage onset due to the impact that may arise during manufacturing. In the detailed design phase, the structure is investigated to study the evolution of delamination growth under loading conditions. The structure is modeled using 3 D elements because of the presence of Interlaminar stresses in the width and thickness direction and anisotropic nature. In this thesis, more emphasis is given on the interface between the skin and the stringer. The debonding effect of the interface is studied using cohesive zone model(CZM).
48
Jin, Liqiang, S. Xiu, Y. Wang, Z. Zhang, J. Fang, and E. Shen. "Minimization of the environmental impact in the chrome tanning process by a closed-loop recycling technology - 95." Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34232.
Full textAbstract:
Content:
It is acknowledged that conventional chrome tanning in leather processing discharges significant amounts of chromium, dissolved solids and chlorides. The recycling technology is one of the effective solutions to reduce the environmental impact of chrome tanning waste water at source. In this work, a novel closed recycling technology of chrome tanning wastewater was applied in the tanning process of the goat skins at a pilot scale level. The properties of chrome tanning liquors obtained by the recycling technology and the resultant crust were analyzed. The results show that this close recycling process works well. The contents of Cr2O3, total organic carbon, ammonia nitrogen and chloride ion in the waste water tend to accumulate with the increase of recycling times, and finally reach a balance after 5 times of recycling. The obtained leather sample is full, soft and having a shrinkage temperature comparable to that of conventional chrome tanned leather. SEM images indicate that the resulting leather samples by this recycling technology show fine and clean grain and well-dispersed fibrils. TG and DSC results show that the thermal stability of wet blue leathers tanned by the circular process are similar to those tanned by conventional chrome tanning process. Compared with conventional chrome tanning technology, water, salt and chrome tanning agent are saved in this process, and the zero emission of chrome tanning wastewater is realized. The cleaner production technology exhibits promising application prospect for its economic and environmental benefits.
Take-Away:
1. A novel closed recycling technology of chrome tanning wastewater was applied in the tanning process of the goat skins at a pilot scale level.
2. The chrome tanning liquors obtained by the recycling technology and the resultant crust were analyzed.
3. Water, Sodium chloride and chrome tanning agent are saved by the closed recycling technology, and the zero emission of chrome tanning wastewater is realized.
49
Li, Vivian V. (Vivian Victoria). "Design of a thermal diffusion sensor for noninvasive assessment of skin surface perfusion and endothelial dysfunction." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43874.
Full textAbstract:
Thesis (M. Eng.)--Harvard-MIT Division of Health Sciences and Technology, 2008.<br>Includes bibliographical references (p. 105-121).<br>The skin microcirculation performs a range of vital functions, such as maintaining nutritional perfusion to the tissues and overall thermoregulation. Not only does impairment to the skin blood supply lead to tissue necrosis and other disease complications, increasing evidence shows that dysfunctional vasoreactivity in the skin microcirculation is associated with multiple disease states, including hypertension, diabetes mellitus, hypercholesterolemia, peripheral vascular disease, and coronary artery disease, and it is one of the earliest indicators of systemic endothelial dysfunction, the precursor to atherosclerotic disease. Endothelial dysfunction is functionally characterized by abnormal vasomotor response to either a pharmacological or flow-mediated stimulus and can be demonstrated in the skin by measuring reperfusion following a period of ischemia, a phenomenon known as post-occlusive reactive hyperemia (PORH). In my research, I have reviewed the literature regarding endothelial dysfunction and its association with a wide range of cardiovascular risk factors. I have also described the mechanisms thought to link endothelial function in the central vascular beds (i.e. coronary) to that of peripheral conduit vessels and the microcirculation. The knowledge thus gathered confirmed that the microcirculation of the skin is an appropriate site for endothelial function assessment. The ultimate goal of my thesis is to design a noninvasive sensor that is capable of obtaining a quantitative measure of skin perfusion, continuously and in real-time, using the principle of thermal diffusion in perfused tissue. I performed preliminary noninvasive endothelial function testing with a modified Thermal Diffusion Probe (TDP), which has been previously validated for absolute perfusion measurement in an invasive setting.<br>(cont.) Based on an initial analysis, I have shown that thermal surface perfusion measurements are feasible and reflect the natural perfusion and temperature fluctuations intrinsic to skin tissue. I also established guidelines for determining quantitative parameters of reactivity from tests of PORH as well as temporal parameters of perfusion variations over time through a spectral analysis of resting blood flow. After establishing the necessary thermal boundary conditions for obtaining surface perfusion measurements, I embarked on a process of computer-assisted modeling and rapid prototyping of various design iterations on an insulated sensor housing, with subsequent fabrication of first generation noninvasive sensors. As a result of these initial sensor designs, specifications for the sensor housing were created to ensure that the appropriate thermal field would be established at the skin measurement site - an important step as it permits the most accurate determination of tissue thermal properties. Finally, I propose a candidate design for an ideal sensor capable of improving the reproducibility of noninvasive perfusion measurements on skin. The development of a noninvasive measure of endothelial dysfunction in the skin is of great value in the early identification of individuals at risk for atherosclerotic complications. Furthermore, the nature of such a technique would provide quantitative information on the presence of a disorder, the extent of dysfunction, and the effectiveness of treatment interventions.<br>by Vivian V. Li.<br>M.Eng.
50
Van, der Schyff Karlien. "Screen bound/skin bound : the politics of embodiment in the posthuman age." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4139.
Full textAbstract:
Thesis (MA (English))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: The end of the second millennium saw a sudden return to corporeality, especially within
feminist scholarship, where embodiment and issues surrounding the body were, for the
first time, made explicit. This study examines the corporeal body in relation to
technology and the impact that newly emerging virtual technologies have on our
understanding of the body, not only through examining representations of the
technologically modified body, but also by exploring how contemporary cultural
practices produce corporeal bodies that view themselves as somehow integrated with
technology. It focuses on the material artefacts of contemporary culture in relation to
explicitly virtual technologies, both arguing for a return to corporeality and contesting the
pervasive trope of disembodiment that characterises so-called “posthuman” age.
This study thus takes one of the most popular metaphors for the relationship between the
corporeal body and technology as its starting point, namely Donna Haraway’s cyborg
figures. Following the publication of Haraway’s “A Manifesto for Cyborgs” (1985), the
female cyborg became an icon of emancipation for many feminist scholars, who utilised
Haraway’s cyborg discourse as a means of discussing the cultural practices that both
construct and limit female gendered identity. Through closely examining the metaphor of
Haraway’s cyborg figures in relation to cultural representations of female cyborg bodies,
this study argues that, ultimately, the metaphor of the cyborg is inherently neither
challenging nor liberating. It then examines the failure of the cyborg as an icon of
postgenderedness in terms of its negation of the corporeal, as cyborg figures
paradoxically only strengthen the same Cartesian dualism Haraway’s cyborg discourse
attempts to deconstruct. It explores representations of three female cyborg figures found
in contemporary popular culture to illustrate how the cyborg body’s negation of the
corporeal only results in the reiteration of conventional gendered stereotypes, rather than
liberation from oppressive gendered practices.
Finally, this study examines the crucial interplay between the corporeal and the
technological, not only when speaking of more imaginary cyborg configurations and tropes, but also when speaking of the physical reality of lived bodies and embodied
experiences. By examining the increasingly embodied nature of cyberspace, this study
explores possible alternatives to the figure of the hypersexualised and disembodied
cyborg, through investigating new figurations with which to describe the embodied
postmodern subject and his/her dependence on technology. Since the central task for a
feminist ethics of embodiment would be grounded in the project of representing the
female body, in such a way that it constructs autonomous women’s representations
without falling prey to patriarchal, stereotypical or estranging images of women’s bodies,
this study concludes with more useful methods of representing the corporeal body in
relation to virtual technology through an appeal to an ethics of embodiment.<br>AFRIKAANSE OPSOMMING: Die einde van die tweede millennium het ‘n skielike belangstelling in beliggaamdheid
ontlok, veral binne feministiese vakgeleerdheid, waar beliggaamdheid en kwessies
rondom die ligaam vir die eerste keer eksplisiet gestel is. Hierdie studie ondersoek die
stoflike liggaam in verhouding tot tegnologie en die invloed wat nuwe, virtuele
tegnologiëe op ons begrip van die liggaam het, nie slegs deur voorstellings van die
tegnologies-gemodifieërde ligaam te ondersoek nie, maar deur ook te kyk na hoe
kontemporêre kulturele praktyke beliggaamde subjekte produseer wat huself op een of
ander wyse as geïntegreerd met tegnologie sien. Die studie fokus op die materiële
artefakte van kontemporêre kultuur in verhouding tot eksplisiet virtuele tegnologiëe. Dit
bevorder ‘n terugkeer tot beliggaamdheid, terwyl dit teen die sogenaamde “postmenslike”
era se mees kenmerkende troop van ontliggaamdheid argumenteer.
Die studie begin dus deur een van die mees populêre metafore vir die verhouding tussen
die liggaamlike en die tegnologiese te ondersoek, naamlik Donna Haraway se siborgfigure.
Sedert die publikasie van Haraway se “A Manifesto for Cyborgs” (1985), het
verskeie feministiese vakgeleerdes die vroulike siborg-figuur beide as ’n ikoon vir
emansipasie beskou en gebruik om die kulturele praktyke wat vroulike geslagsidentiteit
gelyktydig konstrueer én beperk te bespreek. Deur Haraway se siborg-figure met
kulturele voorstellings van vroulike siborg-liggame te vergelyk, kom hierdie studie tot die
gevolgtrekking dat die metafoor van die siborg inherent nóg uitdaagend nóg bevrydend
is. Gevolglik ondersoek die studie die onbevoegdheid van die siborg-figuur as ‘n ikoon
vir postgeslagtigheid in terme van die siborg-liggaam se negering van beliggaamdheid,
aangesien siborg-figure op ‘n paradoksale wyse die selfde Cartesiaanse dualisme versterk
wat Haraway se siborg-diskoers wou dekonstrueer. Dit ondersoek voorstellings van drie
vroulike siborg-figure in kontemporêre populêre kultuur om te illustreer hoe die siborgliggaam
se negering van beliggaamdheid slegs konvensionele geslagstereotipes versterk,
eerder as om ons van beperkende, patriargale geslagspraktyke te bevry. Ten slotte ondersoek hierdie studie die deurslaggewende tussenspel tussen die ligaamlike
en die tegnologiese, nie slegs in terme van meer denkbeeldige siborg tropes nie, maar ook
in terme van die fisiese reailiteit van konkrete, beliggaamde lewenservaringe. Deur die
toenemend beliggaamde kwaliteit van kiberruimtes te ondersoek, stel hierdie studie
moontlike alternatiewe maniere voor om die postmoderne subjek en sy/haar
afhanklikheid van tegnologie te beskryf, eerder as om op ontliggaamde en hipergeseksualiseerde
siborg-figure staat te maak. Aangesien ‘n feministiese beliggaamde
etiek gegrond is in ‘n projek om die vroulike liggaam op só ‘n wyse voor te stel dat
patriargale, stereotipiese of vervreemdbare beelde van die vroulike liggaam vermy word,
eindig hierdie studie met meer nuttige metodes om die stoflike liggaam in verhouding tot
virtuele tegnologie voor te stel deur ‘n beroep tot ‘n meer beliggaamde etiek te maak.