Cost and life cycle assessment of upstream monoclonal antibody production

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電子書籍端末がもたらす環境波及効果 : 消費行動と消費者満足度の変化

学位の種別: 課程博士審査委員会委員 : （主査）東京大学教授 花木 啓祐, 東京大学教授 保坂 寛, 東京大学准教授 井原 智彦, 東京大学教授 森口 裕一, 産業技術総合研究所研究グループ長 田原 聖隆University of Tokyo(東京大学

My Wardrobe in the Cloud: An International Comparison of Fashion Rental

In response to the 2008 global financial crisis, a range of disruptive business model innovations emerged. The fashion industry saw the introduction of fashion rental platforms, aimed at appealing to price-conscious consumers still hungry for the latest styles. While these new business models filled a gap in the market and saw, in some cases, profit in the millions, the phenomenon remained rather niche. The recent pandemic, alongside other isomorphic pressures, have put further constraints on these fashion rental businesses and their entrepreneurs, leaving them struggling in the current economic climate. This chapter explores the entrepreneurial motivations behind rental platforms, the different platform models in operation, and the challenges these businesses face in the 21st century, including increased technological developments, environmental sustainability, and external pressures, such as the most recent pandemic, which saw economies shutting down. Empirically, the authors draw upon a novel dataset comprising six international case studies

Designing Interventions for Behavioral Shifts toward Product Sharing: The Case of Laundry Activities in Japan

This paper presents design approaches to induce behavioral shifts toward product sharing through a case study on laundry activities in Japan. Business models involving provision of temporary access to goods are garnering attention as a way to reduce environmental impacts from the current pattern of consumption. However, the success of such business models is a matter of consumer choice, and there exist hurdles for consumers to forego ownership and transfer to product sharing. To understand the forces that affect consumer behavior involving product sharing and to design effective interventions for behavioral shifts, we conducted in-depth interviews and a web survey. From the results, we specified the decision processes in a behavioral shift between home washing and laundromat use, and generated “implementation of a communal laundromat in an apartment building” as a promising way for consumers to shift toward laundromat use. Based on our calculation, the proposed approach has a potential to reduce environmental impact of a hypothetical community by 1.8% in greenhouse gas emissions and 16% in resource use relative to when only home washing is practiced. Our study provides an example of designing interventions for product sharing through reflecting actual usage patterns and consumer motivations

Design and characterization of a durable and highly efficient energy-harvesting electrochromic window

Thesis (Master's)--University of Washington, 2013With the growing global energy demands, electrochromic window (ECW) technology has attracted great attention for its ability to reversibly change the transmittance of incoming light through applied moderate potential. While ECW has a great potential to conserve energy from lighting and air conditioning in buildings, ECW still consumes energy; ECW should be self-powered for further energy conservation. In this study, a new design of energy-harvesting electrochromic window (EH-ECW) based on fusion of two technologies, organic electrochromic window and dye-sensitized solar cell (DSSC) is presented. Unlike other self-powered smart windows such as photoelectrochromic device that only contains two states (i.e. closed circuit colored state and open circuit bleaching state), EH-ECW allows active tuning of transmittance through varying applied potential and function as a photovoltaic cell based on DSSC. The resulting device demonstrates fast switching rate of 1 second in both bleaching and coloring process through the use of electrochromic polymer as a counter electrode layer. In order to increase the transmittance of the device, cobalt redox couple and light colored yet efficient organic dye are employed. The organic dye utilized contains polymeric structure, which contributes to high cyclic stability. The device exhibits power conversion efficiency (PCE) of 4.5 % under AM 1.5 irradiation (100 mW/cm2), change in transmittance (delta T = Tmax - Tmin) of 34 % upon applied potential, and shows only 3 % degradation in PCE after 5000 cycles

The right place to grow rice for the Japanese market: comparative analysis of greenhouse gas emissions of rice cultivation in Japan and the United States

One consequence of increasing agricultural trade is a shift of geographic location of agricultural activity to more economically productive countries. Whether or not the economic efficiency translates to environmental efficiency for agricultural goods is an open question. To examine environmental implications of shifting agricultural location, we analysed the life-cycle greenhouse gas (GHG) emissions of rice production in Japan and the US for the Japanese market in a comparative manner. This paper presents the life-cycle assessment of brown japonica rice. Our computation of GHG emissions of rice production in Japan and the US were 3.54 and 2.99 kgCO2-eq kg-rice−1, respectively. With respect to harvested area, the emissions were 18.4 in Japan and 27.8 tCO2-eq ha−1 in the US. For Japan to be environmentally competitive with the US production, fundamental restructuration of field size is necessary to increase yield. In conclusion, economic efficiency does not translate to environmental efficiency with the case of rice production. Importing rice is both economically and environmentally viable option for the Japanese market