A5072419250- Recycling and Waste Management Techniques
- Metallic Glasses and Amorphous Alloys
- Environmental Impact and Sustainability
- Extraction and Separation Processes
- Municipal Solid Waste Management
- Sustainable Supply Chain Management
- Innovation Diffusion and Forecasting
- Energy, Environment, and Transportation Policies
- Glass properties and applications
- Quasicrystal Structures and Properties
- Material Dynamics and Properties
- Theoretical and Computational Physics
- Green IT and Sustainability
- Advanced Battery Technologies Research
- Metal Alloys Wear and Properties
- Global Energy and Sustainability Research
- Magnetic Properties of Alloys
- Sustainable Industrial Ecology
- Advanced materials and composites
- Diamond and Carbon-based Materials Research
- Radioactive contamination and transfer
- Environmental Sustainability in Business
- Toxic Organic Pollutants Impact
- nanoparticles nucleation surface interactions
- Product Development and Customization
National Institute for Environmental Studies
2015-2024
Waste Management (United States)
2017
University of Tsukuba
2012
Culture Resource
2008
Institute of Environment and Resource System
2007-2008
Yokohama National University
2006-2008
Teikoku Pharma (United States)
1989-2003
Toshiba (Japan)
2003
Tohoku University
1986-1994
Tokyo University of Agriculture and Technology
1994
Summary Lifespan is an essential parameter for the accounting and analysis of material stocks flows, one main research topics in industrial ecology. also important as a that portrays current historical situation metabolism, which area interest to ecologists. In present article, available information from various reports on product lifespan was reviewed. Although we found large number data many durables, definition published articles varied, limited our ability compare reported values. We...
Summary Lifespan of commodities is essential information for material flow analysis and stock accounting. data available in the literature; however, it varies definition methodology employed. This article reviews categorizes different types lifespan distribution estimation methodologies, investigates relationship differences between definitions methodologies. can be classified into five from two perspectives: base year which drawn, vertical axis distribution. The methodologies estimating...
Product lifespan estimates are important information for understanding progress toward sustainable consumption and estimating the stocks end-of-life flows of products. Publications reported actual products; however, quantitative data still limited many countries years. This study presents regional longitudinal estimation distribution consumer durables, taking passenger cars as an example, proposes a simplified method product distribution. We estimated parameters 17 based on age profile...
National accounts for material stocks and flows are reported regularly by an increasing number of countries to promote a sustainable use our natural resources. In this research we build upon the work Herman Daly Donella Meadows propose framework that links conceptual hierarchy ends means which societal benefit capital. We introduce set six indicators link together quantitatively relate consumption benefits: productivity, primary rate, stock retention time, service utilization. apply...
Ignition and other fire-related incidents have been increasing at municipal waste treatment small electrical electronic equipment (WEEE) recycling facilities in Japan. To understand the current status of lithium-ion battery (LIB)-caused ignition to provide information necessary for countermeasures, we conducted interviews facilities, did real-time monitoring a facility, surveyed LIB mixed non-combustible waste. Several had more than 0.1 per tonne bulky collected FY2020. These accidents were...
循環型社会形成推進基本法の成立, 家電リサイクル法の施行等によって, 使用済み耐久消費財のリサイクル・適正処分等が求められてきている。これらの対策を計画するうえで, 使用済み製品の発生台数の信頼度の高い将来予測が必要になる。本研究では, 出荷台数, 保有台数, 使用年数分布から将来の使用済み耐久消費財の発生台数を予測する方法を提案した。予測に必要となる保有台数の経年変化はロジスティック関数, 使用年数分布はワイブル分布関数を用いてそれぞれ解析を行うとともに, それらの結果を用いて, 乗用車と全自動車, およびテレビ, エアコン, 冷蔵庫, 洗濯機, 掃除機, 電子レンジ, VTRの7種類の家電製品の2020年度までの使用済み製品の発生台数を予測した。また, エアコンを例に平均使用年数が変化した場合の予測を行い, 提案した方法の有用性を示した。
Al-Mn quasicrystals having icosahedral structure were prepared by melt-quenching, and the magnetic electrical properties of both quenched annealed specimens investigated. The magnitude localised moments Mn deduced from Curie constant was qualitatively explained on basis Pauling valence. A cusp in AC susceptibility spin-glass observed at 85K Al-22.5 at.% alloy. magnetisation curves measured low temperatures for alloys exhibited some external field dependence because existence RKKY...
Several kinds of melt-quenched Al–Mn alloys were prepared by a single roller method in order to investigate the structure-sensitive physical properties. By melt-quenching, large grain size about 1 μm diameter was obtained. An electron micrograph obtained from such showed fivefold symmetry quasicrystalline structure, although these contain crystalline Al matrix. X-ray diffraction peaks become smaller with increasing Mn content and no peak observed at 22.5 at%Mn. The intensity DTA curves...
Al-Mn quasicrystals of several kinds compositions were prepared by melt-quenching in order to investigate the magnetic properties. The curves susceptibility against temperature obtained and effective moment Peff was deduced from Curie constant. With increasing Mn content 14.3 22.5%, increases 0.56 1.53 mu B. increment becomes remarkable with increase content. spin glass behaviour, namely cusp AC curve, observed above 20% Mn. freezing Tf 3.3 8.5 K 20.0 22.5% is drastically reduced behaviour...
電気・電子製品23品目について, 家庭と事業所の保有状況のアンケート調査に基づいて, 使用年数分布の推定と2003年度から2008年度までの使用済み台数の推計を行った。その結果, 平均使用年数が長い品目には家電4品目などの比較的高価で古くから普及している品目が多く, 短い品目にはノートPCなどの比較的小型・中型で近年普及が進んでいる品目が多いこと, 他製品へ代替が進行中の品目を除いた22品目について使用年数分布の幅の狭さを示すパラメータbを平均値2.4で近似できることがわかった。また, 2003年度の使用済み台数は23品目合計で約1億3千万台であり, そのうち携帯電話・PHSが4, 520万台と他の品目と比べて桁違いに多いと推計された。さらに, 情報通信機器の使用済み台数は2008年度までに大きく変化することやVTR, 掃除機などは使用済み台数が回収・リサイクル義務のある7品目と同程度であることがわかった。
Product lifetimes are a relevant topic of discussion towards establishing circular economy, particularly in terms the reduction environmental impacts by improving product longevity. Various researchers have developed models to estimate actual and reported case studies for some categories (e.g. electrical electronic equipment, vehicles). However, may not necessarily meet consumers' expectations. Therefore, an integration two perspectives-actual expected lifetimes-should prove helpful...
Heavy metals like mercury that are emitted into the environment remain there indefinitely, posing a long-term threat to both and human health. Elemental is volatile in gaseous form, because of long residence time, transported over distances. Comprehensive control emissions therefore remains an important international issue. The crucial steps for designing effective approaches such include quantification by sources identification geographical characteristics emissions. In this study detailed,...