72 research outputs found
Valuing water quality improvement in China : a case study of lake Puzhehei in Yunnan province
While polluted surface water is encountered across most of China, few economic valuation studies have been conducted on water quality changes. Limited information about the economic values associated with those potential water quality improvements or deteriorations is a disadvantage for making proper choices in water pollution control and clean-up activities. This paper reports an economic valuation study conducted in Yunnan, China, which aims to estimate the total value of a real investment project to improve the water quality of Lake Puzhehei by one grade level. Located in Qiubei County, which is far from large cities, the lake has been experiencing fast water quality deterioration in the past years. A conservative estimation strategy shows that on average a household located in Qiubei County is willing to pay about 30 yuan per month continuously for 5 years for water quality improvement, equivalent roughly to 3 percent of household income. The elasticity of willingness-to-pay with respect to income is estimated to be 0.21. The economic rate of return of the proposed project is estimated to be 18 percent, indicating a strong demand and high efficiency of investment in water quality improvement in China. This study also demonstrates that previous knowledge about water quality changes and the project may have a significant positive impact on people's valuation, and that the interviewer effect on valuation can be negative.Water and Industry,Environmental Economics&Policies,Water Supply and Sanitation Governance and Institutions,Town Water Supply and Sanitation,Water Supply and Systems
Municipal solid waste management in small towns : an economic analysis conducted in Yunnan, China
Municipal solid waste management continues to be a major challenge for local governments in both urban and rural areas across the world, and one of the key issues is their financial constraints. Recently an economic analysis was conducted in Eryuan, a poor county located in Yunnan Province of China, where willingness to pay for an improved solid waste collection and treatment service was estimated and compared with the project cost. This study finds that the mean willingness to pay is about 1 percent of household income and the total willingness to pay can basically cover the total cost of the project. The analysis also shows that the poorest households in Eryuan are not only willing to pay more than the rich households in terms of income percentage in general, but also are willing to pay no less than the rich in absolute terms where no solid waste services are available; the poorest households have stronger demand for public solid waste management services while the rich have the capability to take private measures when public services are not available.Urban Solid Waste Management,Environmental Economics&Policies,Waste Disposal&Utilization,Energy and Environment,Environment and Energy Efficiency
Instruct 3D-to-3D: Text Instruction Guided 3D-to-3D conversion
We propose a high-quality 3D-to-3D conversion method, Instruct 3D-to-3D. Our
method is designed for a novel task, which is to convert a given 3D scene to
another scene according to text instructions. Instruct 3D-to-3D applies
pretrained Image-to-Image diffusion models for 3D-to-3D conversion. This
enables the likelihood maximization of each viewpoint image and high-quality 3D
generation. In addition, our proposed method explicitly inputs the source 3D
scene as a condition, which enhances 3D consistency and controllability of how
much of the source 3D scene structure is reflected. We also propose dynamic
scaling, which allows the intensity of the geometry transformation to be
adjusted. We performed quantitative and qualitative evaluations and showed that
our proposed method achieves higher quality 3D-to-3D conversions than baseline
methods.Comment: Project page: https://sony.github.io/Instruct3Dto3D-doc
Quantum phase transition and Resurgence: Lessons from 3d SQED
We study a resurgence structure of a quantum field theory with a phase
transition to uncover relations between resurgence and phase transitions. In
particular, we focus on three-dimensional supersymmetric
quantum electrodynamics (SQED) with multiple hypermultiplets, where a
second-order quantum phase transition has been recently proposed in the
large-flavor limit. We provide interpretations of the phase transition from the
viewpoints of Lefschetz thimbles and resurgence. For this purpose, we study the
Lefschetz thimble structure and properties of the large-flavor expansion for
the partition function obtained by the supersymmetric localization. We show
that the second-order phase transition is understood as a phenomenon where a
Stokes and anti-Stokes phenomenon occurs simultaneously. The order of the phase
transition is determined by how saddles collide at the critical point. In
addition, the phase transition accompanies an infinite number of Stokes
phenomena due to the supersymmetry. These features are appropriately mapped to
the Borel plane structures as the resurgence theory expects. Given the lessons
from the SQED, we provide a more general discussion on the relationship between
the resurgence and phase transitions. In particular, we show how the
information on the phase transition is decoded from the Borel resummation
technique.Comment: 23+16 pages, 14 figure
6.EMEA International Symposium in Kanazawa, Japan
The EMEA Project, Kanazawa UniversityProject Number 14404021, Peport of Research Project ; Grant-in-Aid for Scientific Research(B)(2), from April 2002 to March 2006, Edited by Muramoto,Ken-ichiroKamata, NaotoKawanishi, TakuyaKubo, MamoruLiu, JiyuanLee, Kyu-Sung , 人工衛星データ活用のための東アジアの植生調査、課題番号14404021, 平成14年度~平成17年度科学研究費補助金, 基盤研究(B)(2)研究成果報告書, 研究代表者:村本, 健一郎, 金沢大学自然科学研究科教
Activities of the EMEA project during 1999-2005
金沢大学大学院自然科学研究科The EMEA Project, Kanazawa University2005 International Symposium on Environmental Mornitoring in East Asia -Remote Sensing and Forests-,Hosted The EMEA Project, Kanazawa University 21st=Century COE Program -Environmental Monitoring and Predicition of Long- and Short- Term Dynamics of Pan-Japan Sea Area- ,予稿集, EMEA 2005 in Kanazawa, 国際学術研究公開シンポジウム『東アジアの環境モニタリング』-リモートセンシングと森林-,年月日:200511月28日~29日, 場所:KKRホテル金沢, 金沢大学自然科学研究科, 主催:金沢大学EMEAプロジェクト, 共催:金沢大学21世紀COEプログラム「環日本海域の環境変動と長期・短期変動予測
Vegatation Measured at Three Different Scales at Kanazawa University, Kakuma Campus
Proceedings of EMEA 2000 in Kanazaw
Fate of Polycyclic Aromatic Hydrocarbons and Radionuclides through Loess over Pan-Japan Sea Area -Reaction, Transportation and Deposition-
金沢大学大学院自然科学研究科金沢大学工学部Nankai, UniversityChinese Academy of SciencesScedule:17-18 March 2003, Vemue: Kanazawa, Japan, Kanazawa Citymonde Hotel, Project Leader : Hayakawa, Kazuichi, Symposium Secretariat: XO kamata, Naoto, Edited by:Kamata, Naoto
Current Performance and On-Going Improvements of the 8.2 m Subaru Telescope
An overview of the current status of the 8.2 m Subaru Telescope constructed
and operated at Mauna Kea, Hawaii, by the National Astronomical Observatory of
Japan is presented. The basic design concept and the verified performance of
the telescope system are described. Also given are the status of the instrument
package offered to the astronomical community, the status of operation, and
some of the future plans. The status of the telescope reported in a number of
SPIE papers as of the summer of 2002 are incorporated with some updates
included as of 2004 February. However, readers are encouraged to check the most
updated status of the telescope through the home page,
http://subarutelescope.org/index.html, and/or the direct contact with the
observatory staff.Comment: 18 pages (17 pages in published version), 29 figures (GIF format),
This is the version before the galley proo
Activities of the EMEA project during 1999-2001
Proceedings of EMEA 2001 in Kanazawa, 25-27 September 2001 in Kanazawa (Japan
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