En el presente trabajo, explicamos como un producto que muchas veces es considerado inservible o ya no apto para el uso que se le solía dar debido al avance de la tecnología puede ser reutilizado. La idea de negocio que presentaremos es un reloj hecho a base de discos de vinilo calados, el cual puede ser utilizado para decorar o personalizar un espacio de tu hogar u oficina. Para ello, hemos fijado nuestro target y hemos calculado el tamaño de mercado según la cantidad de personas que cumple con los criterios de nuestra segmentación. Contando con estos datos, hemos validado la intención de compra de nuestro producto mediante encuestas y, finalmente, hemos concretado ventas. Por otro lado, hemos calculamos la inversión que requeriríamos para llevar a cabo este proyecto, así como las ventas proyectadas a 3 año, el VAN de la empresa y otros indicadores financieros que nos ayudan a validar si nuestra idea de negocio es rentable o no. Por los resultados mostrados a lo largo de la investigación, podemos confirmar que Vinyclock si es un proyecto viable. Además, es un proyecto que también contribuye al medio ambiente al reutilizar residuos y darles un nuevo uso. / In the present work, we explain how a product, which is often considered unusable or no longer suitable for the use that was usually given to it due to the advancement of technology, can be reused. Our business idea that we're going to present is a clock made with openwork vinyl records, which can be used to decorate or personalize a space in your home or office. To do this, we have set our target and we have calculated the market size according to the number of people that meet the criteria of our segmentation. With this data, we have validated the purchase intention of our product through surveys and, finally, we have finalized sales. On the other hand, we have calculated the investment that we would need to carry out this project, as well as the projected sales to 3 years, the NPV of the company and other financial indicators that help us validate if our business idea is profitable or not. For the results shown throughout the investigation, we can confirm that Vinyclock is a viable project. In addition, it's a project that also contributes to the environment by reusing waste and giving it a new use. / Trabajo de investigación

<p> This thesis presents a study on silane based polymerization in two parts. </p> <p> In Part A, diphenylvinylsilane (1) underwent oligomerization with initiation by azo(bisisobutyronitrile) (AIBN) or benzoyl peroxide (BPO). The vinyl groups were preferentially consumed under either set of conditions. Several products were isolated; these included oligomers 3, an AIBN adduct 4, a dimer 5, and a trimer 6. The residual SiH moieties could be subsequently coupled hydrosilylatively with alkynes or vinylsilicones. The efficiency of the radical reactions was very low. 15% starting material was recovered even with 200 mol% of initiating radicals added to the reaction mixture. The relative radical reactivities of the two functional groups is discussed.</p> <p> In Part B, 1 was radically copolymerized with styrene and methyl methacrylate (MMA). From the results of infrared and 1H NMR it was determined that 1 participated in copolymerization via a vinyl type polymerization and not in the form of a hydrogen-transfer type polymerization. Residual SiH groups along the backbone of the polymer remained reactive. A vinylsilicone and 9-vinylanthracene were grafted onto the copolymer from MMA and 1 by hydrosilylation and radical methods, respectively.</p> / Thesis / Master of Science (MSc)

No description available.

No description available.

Syftet med denna uppsats är att undersöka vilka skillnader vana lyssnare beskriver att det upplever vid lyssning, mellan originalutgåva på vinyl från 60-talet och digitala remasters av samma låt, samt vilken av versionerna de föredrar. De skillnader som undersöks är fokuserat på tre tekniska fenomen. Dessa fenomen är dynamiskt omfång, frekvensspektrum och stereobredd. Frågeställningarna är vilka skillnader deltagarna i undersökningen hör mellan versionerna samt vilken version de föredrar. De teoretiska grunderna för att förstå dessa fenomen kommer från Hubers (2013) teorier om dynamiskt omfång och frekvensspektrum, samt Gibson &amp; Curtis (2019) teorier om stereobredd. Metoden som använts för undersökningen är lyssningstest med tillhörande enkät och ett lyssningstest med fokusgruppdiskussion. I undersökningen deltog fyra personer i vardera testet. Den tidigare forskning som presenteras i uppsatsen är från Barys (2013) artikel (Re)Releasing The Beatles där han undersöker fyra låtar och de skillnader som finns mellan vinylversioner från 60-talet och digitala remasters från 2009. I artikeln framgår det att det finns tydliga skillnader mellan versionerna och att den största förklaringen till dessa skillnader var på grund av hur de hade bearbetats på olika sätt. Undersökningens resultat visar att undersökningsdeltagarna uppfattade skillnader mellan versionerna. De största skillnaderna fanns i frekvensspektrumet där deltagarna beskrev de upplevde frekvenserna som motsatser i vinylversionen jämförelsevis med den digitala remastern. Deltagarna upplevde även stora skillnader i det dynamiska omfånget mellan versionerna. Gällande skillnaderna i stereobredden gav undersökningen inga tydliga resultat då deltagarna inte kunde avgöra några större skillnader. Vilken versionen som deltagarna föredrog var väldigt blandad. För några av låtarna i undersökningen så föredrog de den digitala versionen och i några fall originalutgåvan på vinyl. Uppsatsen främsta bidrag till forskningen är den ökade förståelsen för vilken åsikt personer, runt 20 årsåldern på 2020-talet, med god kunskap inom musikproduktion har kring fenomenen vinyl och digital remaster.

<p> Although successful in laboratory studies, field applications of in situ remediation of chlorinated solvents in groundwater have met with limited success. This is most often attributed to the inability to deliver the amendment evenly throughout the target zone, especially in low permeability and heterogeneous materials. The goal of this research was to employ a prototype of a novel delivery system to evenly deliver amendment across the depth and breadth of the subsurface in a cost-effective method. The research was conducted at 42 Voyager Court, Toronto, ON where concentrations of vinyl chloride in groundwater were in excess of Ontario Ministry of the Environment guidelines (O.Reg.153/04). The subsurface consisted of sandy and clayey silt fill underlain by sandy silt till.</p> <p> The delivery system comprised 29, 1/4" diameter, delivery points with small perforations along the length, installed in a fence perpendicular to groundwater flow, approximately 0.5 m upgradient of the area of concern. The delivery system used low flow rates (approximately 13 to 23% of total groundwater flow) and discrete delivery holes to deliver a potassium permanganate solution (approximately 40 g/L) amended with sodium bromide (approximately 0.8 g/L) across the depth of the subsurface. Fourteen multi-level monitoring wells, each with five sampling ports were installed to monitor the effectiveness.</p> <p> After six months of delivery, sample results indicated that oxidant demand hindered the ability of potassium permanganate to reach and degrade the vinyl chloride. However, elevated bromide concentrations were detected at all downgradient sampling ports within a 1.5 m distance. Thus, the delivery system was successful at delivering the amendment across the depth and breadth of the target area and achieving even delivery.</p> <p> Problems, typically leaks, were encountered with the delivery system design. Additional engineering would be required to improve the header system prior to commercializing this process. This would be a beneficial endeavor, as results of this work indicate that this passive delivery fence technique meets a real need in the remediation industry, which is the even distribution of amendment to target zones in the saturated subsurface, including zones of low permeability.</p> / Thesis / Master of Applied Science (MASc)

The adverse effects of contaminated outdoor air have been recognized and subject to control for many years. More recently environmental engineers and health professionals have become cognizant of the hazards associated with contaminated indoor air. It is now understood that contaminated indoor air negatively impacts human health, worker productivity, and physical property. Volatile organic compounds (VOCs) are a common class of indoor air pollutants. Building materials such as treated wood, pressed-wood products, wallboard, sealants, adhesives, floor coverings, and paints can be sources of VOC emissions. The knowledge-base necessary to develop effective solutions to indoor air quality problems requires an understanding of the emissions behavior of indoor materials. Environmental chambers are often utilized to characterize indoor material as sources of VOC emissions to indoor air. Chamber studies, although expensive and time consuming, can be utilized to provide estimates of the rates at which a particular material emits VOCs under a specific set of environmental conditions. By fitting curves to emissions data obtained through chamber studies, VOC emissions models have been constructed. These models are frequently empirical and as a consequence, 1) apply only to the specific material and environmental conditions investigated, 2) provide little understanding of the source/sink characteristics of the material, and 3) provide little knowledge of the mass transfer processes governing emissions behavior. As a result, our understanding of the mechanisms that control VOC emissions from indoor materials remains rudimentary. Physically-based models that describe the emissions characteristics of building materials would greatly facilitate the process of improving indoor air quality. Evidence exists suggesting well-established fundamental mass transfer mechanisms govern emissions from indoor materials. Of the various mechanisms governing emissions behaviors, diffusion appears to be one of the most significant. The primary objective of this research was to demonstrate that the VOC emissions source behavior of a diffusion-controlled homogenous building material could be predicted using a mechanistic mathematical model. A commercial grade sheet vinyl flooring (VF) was selected for study because VF is present in many residential and commercial buildings, is relatively homogenous, and has been shown to emit hazardous organic chemicals. If successful, this research would demonstrate that the proposed strategy could be generalized to other VOC sources using appropriately constructed mathematical models. Satisfying the research objective required development of a physically-based model to predict gas-phase VOC concentrations resulting from exposure to a diffusion-controlled material. Key parameters for this model are the solid-phase diffusion coefficient, D; the solid/air partition coefficient, K; and the initial solid-phase VOC concentration, C0. D and K have been previously quantified for only a few indoor materials and methods for determining C0 are rudimentary. Therefore, this research project required development and execution of methods for quantifying D, K, and C0. D and K were quantified using a recording microbalance. C0 was evaluated using a new technique of cryogenic milling followed by fluidized bed desorption. The model was validated by exposing a VF sample in an environmental chamber and directly measuring gas-phase VOC concentrations resulting from mass transfer from the solid material. Further model validation was achieved by directly measuring the VOC concentration profiles after exposure in environmental chambers. Because the key model parameters were quantified independently of chamber studies, the model validation process provided a rigorous test of the validity of the mass transfer model in particular and of the source characterization strategy in general. The results of this research contribute to our understanding of the fundamental mechanisms that govern emissions of VOCs from vinyl flooring and provide a sound theoretical foundation for characterization of a wide range of other sources of indoor VOCs. This understanding could facilitate product reformulation strategies aimed at preventing or reducing indoor air contamination. Mass transfer models could also be utilized to develop standards for the environmental performance of indoor materials. The proposed approach will prove useful in conjunction with broader studies on sick building syndrome to identify sources that may have a critical impact on the health and comfort of building occupants. / Ph. D.

Wheat gluten, wheat gliadin, and corn zein agricultural proteins were evaluated as multifunctional additives that: (1) provided reinforcement, (2) improved thermal stability, and (3) lowered the cost of polymer composites. Wheat proteins were utilized in two polymer matrices: poly(vinyl alcohol) (PVA) and synthetic cis-1,4-polyisoprene rubber (IR). The proteins were hydrolyzed and dispersed in the polymer matrix, where they cooperatively self-assembled into nanostructures called amyloids. Amyloids have the potential for high rigidity and stability due to high β-sheet content. In Chapter II, trypsin hydrolyzed wheat gluten (THWG) proteins were incubated in aqueous PVA solutions, then the composite solutions were air dried and compression molded into films. Anisotropic protein aggregates formed through a typical mechanism of β-sheet self-assembly, where a greater molding time and pressure and/or a lower PVA molecular weight allowed for more protein aggregation. The larger protein structures provided less reinforcement. In Chapters III and IV, THWG and trypsin hydrolyzed gliadin (THGd), a component protein in wheat gluten, were compounded in synthetic polyisoprene rubber to form nanocomposites. The reinforcement correlated to the protein β-sheet content and varied with protein concentration, protein batch preparation, processing temperature, and compounding time. The isotropic β-sheet containing structures were very thermally stable, even under harsh rubber compounding conditions. By optimizing the processing parameters uniform protein dispersion and optimal IR reinforcement were achieved, although the protein and IR phases had poor compatibility. In Chapter V, the THGd-IR composites were cured using a typical cure package and molding process. Protein aggregation into nanostructured β-sheets was observed during the curing process. Rubber reinforcement increased as a function of protein concentration and curing time. In Chapter VI, a hydrophobic protein (zein) was substituted for the hydrophilic protein (gliadin) used previously to improve protein-IR compatibility. The zein protein was better at reinforcing IR, while gliadin improved mechanical stability. Both zein and gliadin improved the thermal stability of IR. The results from Chapters II-VI showed an interesting concept: in situ filler formation in polymer matrices where the choice of protein, polymer, and processing conditions influenced the final morphology and composite properties. / Doctor of Philosophy / We use plastics every day for a wide range of applications, from food packaging to automobile tires. Many of these plastics are composite materials, called “polymer composites,” meaning they are made of two or more chemically distinct materials where one material is a polymer. For reference, a polymer is a long chain molecule made of many (“poly-”) units (“- mer”). Polymer composites often contain additives which modify the properties of the polymer. For example, many soft polymers, such as tire rubber, need to be made stiffer and so a “reinforcing additive” is used to improve the stiffness of the rubber. Many composite materials are made stiffer so less material can be used. This process is called “lightweighting.” The automotive industry and food packaging industry use this process to reduce weight and fuel costs. In this research, plant proteins are tested as reinforcing additives in polymer composites. Plant proteins, such as wheat gluten, are abundant, non-toxic, sustainable, and can self-assemble into extremely small, stiff structures. For these reasons, plant proteins offer an environmentally friendly alternative to typical reinforcing additives. This dissertation shows that plant proteins can reinforce two polymers with very different properties. The first polymer is poly(vinyl alcohol) (PVA), which is biodegradable, hydrophilic (i.e., “water loving”), and is commonly used in flexible food packaging. The second polymer is synthetic cis-1,4-polyisoprene rubber (IR), which is non-biodegradable, hydrophobic (i.e., “water fearing”), and is commonly used in automotive tires. In Chapters II-V, the wheat gluten protein is hydrolyzed, i.e., chemically “chopped” into short chain peptides, to encourage the self-assembly of the plant protein into small, stiff structures. The self-assembled protein structures survive typical industrial processing techniques, such harsh rubber compounding conditions which involve high heat, pressure, and shear forces (i.e., the material is pushed in opposing directions). In Chapter VI, full corn and wheat proteins are incorporated into IR using standard industrial mixing and curing processes. The corn and wheat proteins reinforce the synthetic rubber and inhibit the degradation of the chemical structure of cured rubber under high heat. At certain protein concentrations, the proteins improve the elasticity and lessen the permanent deformation in the polymer composite. Together, Chapters II-VI show that proteins from diverse plant sources can be used to improve the performance of polymers with dissimilar properties.

@font-face { font-family: "Calibri"; }p.MsoNormal, li.MsoNormal, div.MsoNormal { margin: 0in 0in 0.0001pt; text-indent: 0.5in; line-height: 200%; font-size: 11pt; font-family: "Times New Roman"; }div.Section1 { page: Section1; } Foster Child is my attempt to bring to light my love for dolls as creatures to be created and imagined again and again. In terms of childhood play, toys function and exist on many levels. Each becomes a friend to some and, in some cases, a confidant. Dolls become more than a plastic play-thing and through the eyes of the individual take on a life of their own based upon the user’s own personal experiences. What I deem my creation will inherently change to someone else’s and even to my mood. I aim to offer the ability to create and blur the lines of these creations. My work is self-explorative and tells of the circumstances from my childhood I hold close.

Kyoto University (京都大学) / 0048 / 新制・論文博士 / 博士(工学) / 乙第12199号 / 論工博第3988号 / 新制||工||1438(附属図書館) / 26271 / UT51-2008-C969 / (主査)教授 堀井 文敬, 教授 渡辺 宏, 教授 金谷 利治 / 学位規則第4条第2項該当