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Search Results: 1 - 10 of 1451 matches for " Daisuke Sawauchi "
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Assessment of Carbon Dioxide Emissions from Biodiversity-Conscious Farming: A Case of Stork-Friendly Farming in Japan  [PDF]
Daisuke Sawauchi, Yasutaka Yamamoto
Low Carbon Economy (LCE) , 2015, DOI: 10.4236/lce.2015.61002
Abstract: Although agriculture can contribute to ecosystem services, it can also be a source of disservices, including loss of biodiversity and emissions of greenhouse gases and pollutants. In this study, we evaluate the biodiversity-conscious farming method in terms of the impact on global warming by using the life cycle assessment (LCA) taking stork-friendly farming in Japan as a case of farming method. The results show that efforts for biodiversity conservation and countermeasures against global warming may be in a trade-off relationship. The results suggest that expansion of the farming scale and switch from low-agrichemical to agrichemical-free farming may be two possible paths towards a lower carbon dioxide emission than the current level.
Carbon Dioxide Emissions and Energy Self-Sufficiency of Woody Biomass Utilization for Residential Heating: A Case Study of Nishiwaga, Japan  [PDF]
Daisuke Sawauchi, Daisuke Kunii, Yasutaka Yamamoto
Journal of Environmental Protection (JEP) , 2015, DOI: 10.4236/jep.2015.64032
Abstract: Renewable energy sources, including bioenergy, are presently attracting considerable attention as possible substitutes for fossil fuels. Among the various sources of bioenergy, biomass can arguably play a significant role in the reduction of greenhouse gases and the provision of a stable energy supply. However, the use of fossil fuels continues in the production of bioenergy. Consequently, the overall extent to which biomass utilization for energy can reduce carbon dioxide emissions as a substitute for fossil fuels and whether this can improve the energy self-sufficiency rate remains largely unknown. This study responds to these questions using a case of a Japanese rural community using firewood for residential heating. The results showed that woody biomass utilization for energy is able to both reduce the dependence on fossil fuels and mitigate climate change. These findings offer new insights into the development of sustainability in rural communities.
The Regional Comprehensive Economic Partnership and Its Potential Impact on Greenhouse Gas Emissions  [PDF]
Hirokazu Akahori, Daisuke Sawauchi, Yasutaka Yamamoto
Journal of Environmental Protection (JEP) , 2016, DOI: 10.4236/jep.2016.79105
Abstract: Whether trade liberalization resulting from mega free trade agreements, such as the Regional Comprehensive Economic Partnership (RCEP), will have an impact on the environment is the subject of ongoing debate and remains an empirical matter. In this paper, we contribute to the debate on the relation between trade and the environment by considering the case of the RCEP and examining whether it will increase or decrease greenhouse gas (GHG) emissions. We measure the impact of the RCEP on GHG emissions using the Global Trade Analysis Project (GTAP) model and the GTAP CO2 and non-CO2 emissions databases. Our results suggest that the RCEP is likely to “increase” the total amount of GHG emissions in the 16 RCEP members and the world.
Consideration on Poverty Problem of Young People in Industrialized Countries and Their Solutions  [PDF]
Daisuke Hirahara
Modern Economy (ME) , 2018, DOI: 10.4236/me.2018.91013
Abstract: Increase of irregular workers called working-poor is a problem. This unstable employment makes the poor more poverty. The possibility that a simple work is deprived by the development of artificial intelligence is increasing. From this background, restructuring of social structure and policies become important. In Japan, as the declining birthrate and aging population progresses, there is concern that more people need medical care and nursing care services, so increasing social security expenses is also a problem.
Comparison between 3D-IR-BTFE Method and Conventional Method in Contrast Head MRI Examination  [PDF]
Daisuke Hirahara
Open Journal of Medical Imaging (OJMI) , 2018, DOI: 10.4236/ojmi.2018.83005
Abstract: MRI using gadolinium contrast media is useful in diagnosis; however, nephrogenic systemic fibrosis is a serious side effect of gadolinium exposure. Moreover, it turns out that gadolinium deposits in the brain. This has escalated the necessity for a suitable method to use gadolinium contrast media. I developed a new imaging method that had excellent contrast. This study examined the usefulness of that new imaging method and found the method is highly effective.
Claisen and Intermolecular Rearrangement of Cinnamyloxynaphthalenes  [PDF]
Yutaka Okada, Daisuke Imanari
International Journal of Organic Chemistry (IJOC) , 2012, DOI: 10.4236/ijoc.2012.21007
Abstract: Rearrangements of the 1- and 2-cinnamyloxynaphthalenes undergo in diethylene glycol and decalin with solvent de-pendence. In 2-cinnamyloxynaphthalene, the Claisen rearrangement occurs regardless of the solvents. However, for the 1-analogue, the Claisen rearrangement occurs in decalin, while both the Claisen and intermolecular rearrangements occur at higher temperatures in diethylene glycol.
Novel Synthetic Method for the Vilsmeier-Haack Reagent and Green Routes to Acid Chlorides, Alkyl Formates, and Alkyl Chlorides  [PDF]
Yoshikazu Kimura, Daisuke Matsuura
International Journal of Organic Chemistry (IJOC) , 2013, DOI: 10.4236/ijoc.2013.33A001
Abstract: An environmentally benign and practical preparation method for the Vilsmeier-Haack reagent (VH) has been developed by using phthaloyl dichloride with DMF in toluene or 2-chlorotoluene. Phthalic anhydride as the byproduct was recovered in high yield by simple filtration. Some aromatic acids have been transformed into the corresponding acid chlorides in good yields by employing the isolated VH. Treatment of primary or secondary alcohols with VH gave alkyl formates or alkyl chlorides by depending on the reaction conditions.
Stereoselective Aldol Reaction in Aqueous Solution Using Prolinamido-Glycosides as Water-Compatible Organocatalyst  [PDF]
Daisuke Miura, Tomoya Machinami
Modern Research in Catalysis (MRC) , 2015, DOI: 10.4236/mrc.2015.41003
Abstract: Prolinamido-glycoside catalyzed asymmetric aldol reaction in aqueous media is reported. The reactions are rapid and highly stereoselective when water is used as solvent. The stereoselectivities were under influence of configurations of a prolyl residue of the catalyst and α-chiral aldehydes. Water soluble prolinamido-glycoside catalysts are easily separable from reaction mixture and can be recycled and re-used several times.
Government Expenditure Financing in the Money-in-the-Production-Function Model  [PDF]
Akihiko Kaneko, Daisuke Matsuzaki
Theoretical Economics Letters (TEL) , 2018, DOI: 10.4236/tel.2018.82008
Abstract: In this study, we consider a scenario in which the government resorts to an income and inflation tax to finance its expenditures in the money-in-the-production-function model. We show that a financing shift from the inflation tax to the income tax increases the real money holdings-to-capital ratio because the accumulation of capital is less favorable than holding money. We also find that a country’s economic growth rate is maximized if all government expenditures are financed through an income tax. For welfare maximization, the government should set the income tax rate higher than the growth maximizing tax rate and reimburse the excess revenue using money contraction.
Challenges Faced by the Kenya Water Sector Management in Improving Water Supply Coverage  [PDF]
Chemeril Chepyegon, Daisuke Kamiya
Journal of Water Resource and Protection (JWARP) , 2018, DOI: 10.4236/jwarp.2018.101006
Abstract: Water is an important component in national development. Despite the efforts of the Kenyan government to increase water coverage throughout the country so that economic development of the nation remains unimpeded, recent statistics show that the rate of water supply improvement is unlikely to support the nation’s long-term development goals. This paper examines literature, reports, studies and other relevant information regarding Kenya’s water sector in order to expose the underlying causes of the challenges the sector management faces. It also analyses the interrelationships between the challenges and discusses opportunities for improvement. From the study, nine root causes of the challenges that are of technical, economic and social in nature were identified. As they evolve, they conjoin into other problem scenarios characterised by: unsustainability of water supply systems, low social acceptance of interventions, low investment in the sector and water-related conflicts. It is also observed that the sector management has opportunity for improving the current situation through adoption of elaborate monitoring strategies for water services and water resources, embracing sustainable technologies and involving target beneficiaries in water supply development. Great strides can be achieved by the sector through Adaptive Management (AM).
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