A5089582199- Advanced Surface Polishing Techniques
- Advanced machining processes and optimization
- Nanofabrication and Lithography Techniques
- Railway Systems and Energy Efficiency
- Railway Engineering and Dynamics
- Advanced Machining and Optimization Techniques
- Transportation Planning and Optimization
- Electric Power System Optimization
- Ion-surface interactions and analysis
- Infrastructure Resilience and Vulnerability Analysis
- Force Microscopy Techniques and Applications
- Transport and Economic Policies
- Smart Grid Energy Management
- Evacuation and Crowd Dynamics
- Complex Network Analysis Techniques
- Energy, Environment, and Transportation Policies
- Nanowire Synthesis and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Electoral Systems and Political Participation
- Integrated Energy Systems Optimization
- Global Energy Security and Policy
- Facility Location and Emergency Management
- Metallic Glasses and Amorphous Alloys
- Aluminum Alloy Microstructure Properties
- Disaster Management and Resilience
National Graduate Institute for Policy Studies
2013-2023
Heinrich Heine University Düsseldorf
2020
University of Toyama
2003-2010
Saitama University
1983-1995
Universitätszahnklinik Wien
1989
Massachusetts Institute of Technology
1987
Central Research Institute of Electric Power Industry
1978-1980
Leading academic institutions, governments, and funders of research across the world have spent last few decades fretting publicly about need for scientists organisations to engage more widely with public be open their research. While a global literature asserts that communication has changed from virtue duty in many countries disciplines, our knowledge what institutions are doing factors drive 'going public' is very limited. Here we present first cross-national study N = 2,030 institutes...
Tribo-nanolithography (TNL) can form an affected layer on a silicon surface that is resistant to corrosion by KOH, and nanostructure be fabricated combination with wet chemical etching. Transmission electron microscope (TEM), Auger spectroscopy (AES) secondary ion mass spectrometry (SIMS) analyses were utilized investigate the mechanism of etch stop effect machined area. TEM observation revealed crystal structure was converted amorphous measuring approximately 15–20 nm. AES SIMS indicated...
An entire airport terminal building is simulated to examine passenger flows, especially international departures. First, times needed for passengers be processed in the are examined. It found that waiting time check-in accounts more than 80 percent of total spent airport. A special-purpose data-generator designed and developed create experimental data executing a simulation. possible number missing their flights could drastically reduced by adding supporting staff making use first-...
Japan's health care system is considered one of the best systems in world. Hospitals are most important resources Japan. As such, we investigate Japanese hospitals from various viewpoints, including their roles, ownership, regional distribution, and characteristics with respect to number beds, staff, doctors, financial performance. Applying a multivariate analysis regression model techniques, show functional differences between urban populated prefectures remote ones; equality gap among all...
Apportionment, problem has been focused upon for more than 200 years by many applied mathematicians and operations researchers. Balinski Young have done quite extensive works this problem. In paper we propose a parametric divisor method solving an apportionment Our is shown to "cover" most traditional methods. First introduce the idea of stable regions allocation seats each political constituency, then show explicit relation between methods corresponding regions. Then look at these from...
This article examines how socio-economic status and social mobilisation are linked to local government performance management in Nepal. As part of reform, Nepal adopted a policy selected governments empower communities for their effective participation. Our results show that have significant relationship with management. Female literacy, example, is strongly significantly associated management, while area has positive but population only weak relationship. In contrast, poverty negative...
Apportionment problem has a very long history of more than 200 years and been challenged actively by many applied mathematicians operations researchers. In the last apportionment methods have proposed various types properties, which they should desirably satisfy, investigated although itself not completely solved yet. Unbiasedness is an important property for method, studied intensively Balinski Young others. this paper we investigate unbiasedness parametric divisor comparing with that most...
A simple process of fabricating a three-dimensional nanostructure on silicon surface was investigated in this study. The area irradiated by focused ion beam (FIB) selectively etched HF, whereas the non-irradiated scarcely etched, and consequently, concave fabricated area. To control depth nanostructure, dependence irradiation parameters investigated. As result, it found that can be controlled changing parameters, such as dose energy. Under low-dose condition, due to formation an amorphous...
We investigate the major characteristics of occurrences, causes and counter measures for aircraft accidents in Japan. apply statistical data analysis mathematical modeling techniques to determine relations among economic growth, aviation demand, frequency aircraft/helicopter accidents, occurrence intervals number fatalities due accidents. The model suggests that can be explained by probability distributions such as exponential distribution negative binomial distribution, respectively. show...
We investigate train accident data in Japan to elucidate the causes and improve countermeasures for reducing number of accidents. deal with statistical on accidents last 15 years, including frequency, types such as derailment crash, consequences. review historical trend by applying a modeling approach dealing both serious total Probability distributions explaining this are shown. show results quantitative analyses accidents, that occurred at ground-level crossing relationship among utility...
A simple and rapid method is proposed for nanoscale patterning on a metallic glass surface using focused ion beam irradiation followed by wet etching. It was found that the etch rate of irradiated with Ga+ ions could be drastically changed, possible this method. Cross-sectional transmission electron microscopy observation reveals substrate maintains an amorphous phase following irradiation. Etching enhancement not observed Ar+ ions. The results indicate etching from presence implanted rather...
Given the seriously damaged emergency situation occurring after a large-scale natural disaster, critical and important problem that needs to be solved urgently is how distribute necessary relief goods, such as drinking water, food, medicine, area transport them corresponding actual supply demand quickly possible. The existing infrastructure, traffic roads, bridges, buildings, other facilities, may suffer from severe damage. Assuming uncertainty related with each road segment’s availability,...
Abstract We consider the shortest‐path‐counting problem (SPCP), which asks how many shortest paths is each edge of a network contained in? There are n ( −1) in with nodes, so among all these SPCP requires us to count number passing through edge. obtain theoretical results form explicit expressions for special types networks such as trees, grid type, circular etc. apply measure importance city road segments, will certainly contribute estimate traffic congestion segments. Then we propose...
Three years have passed since the 2011 Great East Japan Earthquake (GEJE) hit northeastern part of Japan. The earthquake then triggered a devastating tsunami and nuclear accident, which in turn created compound disaster that claimed large number human casualties devastated properties. GEJE caused economy growth to decline by 2.2% with largest decrease experienced industrial sector (−7.1%), followed agricultural (−3.6%) services (−0.2%). agriculture manufacturing sectors underwent decreases...
Abstract We consider the path‐counting problem that asks how many paths exist between any two different nodes in a network after deleting an arbitrary number of edges or from original network. Using methods, we propose quantitative method for measuring robustness network‐structured system. First define connectivity function and attempt to obtain expected Applying Monte Carlo method, estimate edge deletion node functions when are deleted approximate using appropriate nonlinear with...
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Abstract This paper presents an optimal track maintenance scheduling model developed for maintaining adequate conditions of the railway tracks and accomplishing efficient management service. Our has been used in several major Japanese companies to develop schedules (OTMS). Since train accidents cause enormous losses (not only company but also society), we propose take into account risk while developing OTMS. Thus, it is critically important identify measures quantitatively evaluate ensure...