Tokyo Polytechnic University
Tokyo, Japan

Tokyo Polytechnic University is a private university in Honchō, Nakano, Tokyo. Its nickname is Shadai . It was formerly known as Tokyo College of Photography .The university was founded as Konishi Professional School of Photography in Shibuya in 1923. The founder, Rokuemon Sugiura VII, was the president of Konishi Main Shop at that time and founded the school to fulfil the wish of Rokuemon Sugiura VI, the previous president.Beginning in 2007, the university offers courses in manga studies and animation studies. Wikipedia.

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Udagawa Y.,Tokyo Polytechnic University
ACM International Conference Proceeding Series | Year: 2016

Software clones are introduced to source code by copying and slightly modifying code fragments for reuse. Thus, the problem of finding software clones is essentially the detection of strings that partially match. This paper describes a software clone detection technique using a sequential pattern-mining algorithm. After outlining a code normalization technique that extracts codematching statements of interest from a specific programming language, viz., Java, we discuss how to extract a set of frequent sequences with gaps from a set of sequences that correspond to methods. The proposed algorithm also deals with maximal frequent sequences to find the most compact representation of sequential patterns. We define the maximal frequent sequence in the context of a partial match of sequences or gapped sequences. The novelty of our approach includes modified longest-common-subsequence (LCS) and backtrace algorithms for handling partial matches of sequences systematically. The paper also reports on the results of a case study using Apache Struts 2.5.2 Core. The results demonstrate the ability of the proposed algorithm to find clones of Types 1, 2, and 3. © 2016 ACM.

A norbornane-2-spiro--cycloalkanone--spiro-2-norbornane-5,5,6,6-tetracarboxylic dianhydride represented by the following general formula (1): [in the formula (1), n represents an integer of 0 to 12, and R^(1)s, R^(2), R^(3 )each independently represents a hydrogen atom or the like].

A norbornane-2-spiro--cycloalkanone--spiro-2-norbor nane-5,5,6,6-tetracarboxylic dianhydride represented by the following general formula (1):^(1)s, R^(2), R^(3) each independently represents a hydrogen atom or the like].

Barone G.,Tokyo Polytechnic University | Pirrotta A.,University of Palermo
Engineering Analysis with Boundary Elements | Year: 2013

Evaluation of shear stresses distribution due to external shear forces applied to De Saint-Venant beams has been solved through Complex Variable Boundary Element Method properly extended, to benefit from advantages of this method, so far widely used for twisted solids. Extending the above method, further simplifications have been introduced such as those of performing line integrals only, instead of domain integrals. Numerical applications confirm accuracy and efficiency of the proposed extended version of the method, since the good agreement with results proposed in literature. © 2012 Elsevier Ltd.

Kim Y.,Tokyo Polytechnic University | Kanda J.,University of Tokyo
Journal of Wind Engineering and Industrial Aerodynamics | Year: 2010

Many studies on reducing across-wind responses of tall buildings have been investigated, mainly focusing on the effect of corner shape. And it is also known that changing section along the height through tapering or set-back could reduce across-wind responses of tall buildings. In this paper, to investigate the mechanism of aerodynamic force reduction, the wind tunnel tests for fluctuating pressure and fluctuating force were carried out. Two models with different tapering ratio of 5% and 10%, one set-backed model and one prototype square prism with side ratio of unity were employed under two typical boundary layers which represent suburban and urban flow condition. It is concluded that tapering or set-back helps to reduce the mean drag force and the fluctuating lift force. Reduction ratio increases as tapering ratio increases, and the set-backed model is more effective to reduce the fluctuating lift force than the tapered model with identical surface area, reducing the coefficients about 40% in suburban flow condition. And by tapering and set-back, the power spectra of wind pressures at sideward surface become wideband and the peak frequencies depend on height, which makes the correlation near the Strouhal component low or even negative. © 2010 Elsevier Ltd.

Shibuya M.,Tokyo Polytechnic University
Optical Review | Year: 2014

The progress of science and technology has directly affected the development of lens optics, and the requirements for high-performance optics have been a driving force behind improvement in this field. I will introduce various improvements in lens optics in which I have had a hand, and which make me firmly believe that the development of lens optics will never cease, thus leading us to conclude that “Lens optics will be brilliant forever”. © 2014, The Optical Society of Japan.

Enteria N.,Tokyo Polytechnic University | Mizutani K.,Tokyo Polytechnic University
Renewable and Sustainable Energy Reviews | Year: 2011

This paper presents the review of the development and application of the thermally activated desiccant cooling technologies. The paper first introduces the global problem of energy and the environment related to the consumption of the carbon-based energy sources (gas, oil and coal). The contribution of the building sector to the above problem so as to maintain indoor environment providing human thermal comfort is shown. In this paper, the alternative methods for the provision of the human thermal comfort through thermally activated desiccant cooling technologies are discussed - solid desiccant, liquid desiccant and hybrid desiccant cooling systems. These technologies are potential alternatives to the mechanical vapor compression cooling technologies in the provision of human thermal comfort conditions. However, the development and application is mostly in developed and advanced developing countries. For a global scale solution to the problem of energy and environment contributed by the building sector for maintenance of comfortable conditions, dissemination of ideas and technologies to the developing world (Africa, South and South East Asia, South America) enhances the applicability and practicability of these technologies. © 2010 Elsevier Ltd. All rights reserved.

Aquino R.E.R.,Tokyo Polytechnic University | Tamura Y.,Tokyo Polytechnic University
Journal of Wind Engineering and Industrial Aerodynamics | Year: 2013

Structural damping, particularly in wind-resistant design applications where the main structure is desired to generally remain within linear-elastic limits, has been widely attributed to a stick-slip mechanism occurring at material interfaces between primary structural members and secondary components. However, no one has yet proven this analytically using an appropriate mathematical model and probabilistic considerations. A theoretical expression for damping due to one stick-slip component (SSC) in a simple linear 1DOF system is thus first derived. In actual structures, there can be a very large number of SSCs, so theoretical expressions are then derived to pursue the study for a number of different cases, also considering different probability distributions to characterize the large number of unknown parameters. One apparent result from all analyses carried out is found: damping increases but eventually decreases with amplitude due to these SSCs. This amplitude dependency of structural damping can be observed in measurements on actual structures, demonstrating that the stick-slip phenomenon can indeed be a primary mechanism behind structural damping in wind-resistant design applications. Finally, the implication on the design wind loads of using the derived model in contrast to current models is discussed, illustrating a limitation in these damping models. © 2013 Elsevier Ltd.

Yu B.-G.,Korea Institute of Energy Research | Matsui M.,Tokyo Polytechnic University | Yu G.-J.,Korea Institute of Energy Research
IEEE Transactions on Industrial Electronics | Year: 2011

Since islanding of photovoltaic (PV) generation can cause safety problems, it should be prevented. This paper proposes a correlation-based islanding-detection method (IDM) using current-magnitude disturbance for a PV system. As an islanding-detection index, this paper uses the correlation factor between current-magnitude disturbance and the corresponding inverter output voltage. The proposed IDM uses the characteristics in which the up/down current disturbance has a strong correlation with the PV output voltage when islanding occurs. The proposed method has fast islanding capability and high power quality. For verification of the proposed method, the simulated and experimental results of a 3-kW PV inverter by IEEE Std. 929-2000 and IEEE Std. 1547.1-2005 are provided. The proposed correlation technique can be used in other active antiislanding methods based on the correlation between the current and voltage after islanding occurs. © 2006 IEEE.

Yokogawa S.,Tokyo Polytechnic University
Japanese Journal of Applied Physics | Year: 2014

A lifetime prediction model of stress-induced voiding (SIV) has been developed to investigate the geometry dependence of lifetime in Cu/low-? interconnects. A physical extrapolation model based on Cu ionic transport and time-dependent stress relaxation is proposed for obtaining an accurate estimation. The validity of the model is discussed from the viewpoints of linewidth and temperature dependences by comparison with an extrapolation using the empirical power law. © 2014 The Japan Society of Applied Physics.

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