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Astrochemical Properties of Planck Cold Clumps
Tatematsu, Ken’ichi,Liu, Tie,Ohashi, Satoshi,Sanhueza, Patricio,Nguyê,̃,n Lu’o’, Quang,Hirota, Tomoya,Liu, Sheng-Yuan,Hirano, Naomi,Choi, Minho,Kang, Miju,A.Thompson, Mark,Fuller, Gary,Wu, Y Published by the University of Chicago Press for t 2017 The Astrophysical journal Supplement series Vol.228 No.2
<P>We observed 13 Planck cold clumps with the James Clerk Maxwell Telescope/SCUBA-2 and with the Nobeyama 45 m radio telescope. The N2H+ distribution obtained with the Nobeyama telescope is quite similar to SCUBA-2 dust distribution. The 82 GHz HC3N, 82 GHz CCS, and 94 GHz CCS emission are often distributed differently with respect to the N2H+ emission. The CCS emission, which is known to be abundant in starless molecular cloud cores, is often very clumpy in the observed targets. We made deep single-pointing observations in DNC, (HNC)-C-13, N2D+, and cyclic-C3H2 toward nine clumps. The detection rate of N2D+ is 50%. Furthermore, we observed the NH3 emission toward 15 Planck cold clumps to estimate the kinetic temperature, and confirmed that most targets are cold (less than or similar to 20 K). In two of the starless clumps we observed, the CCS emission is distributed as it surrounds the N2H+ core (chemically evolved gas), which resembles the case of L1544, a prestellar core showing collapse. In addition, we detected both DNC and N2D+. These two clumps are most likely on the verge of star formation. We introduce the chemical evolution factor (CEF) for starless cores to describe the chemical evolutionary stage, and analyze the observed Planck cold clumps.</P>
KEN-ICHI TADA,SHIGENOBU SHINOHARA,HIROFUMI YOSHIDA,HIROAKI IKEDA,YASUHIRO SAITOH,KEN-ICHI NISHIDE,MASAO SUMI 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
The measurable speed range of the self-mixing type semiconductor laser range finder has been greatly improved by employing a new processing circuit. Using this range finder as an external finder of a single lens reflex (SLR) autofocus (AF) camera, some clear photographs of an object moving at a medium speed of 20 ㎜/s is obtained.
Ken-ichi Funazaki,Nao Yoshida,Suzuna Saito 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.5
Demand for highly efficient gas turbine systems has been increasing TIT (turbine inlet temperature) and this trend will continue for forthcoming carbon-neutral age, necessitating the turbine designers to invent new ideas for adequate cooling of the turbine vanes and blades with less cooling air. Film cooling is one of the most effective cooling methods and a vast number of relevant studies have been made on this topic for decades. Recently several attempts including ones by the present authors have been made to investigate effects of flow control devices placed upstream or downstream of the cooling holes to improve film cooling effectiveness, showing promising results for their application to real gas turbines. This study proposes a new flow control device (FCD). This device takes V-shaped geometry on a flat plate to enhance the attachment of injected cooling air to the surface and it is placed very close to a cooling hole for the thermal management of the device itself. To maximize the aero-thermal performance of V-shaped FCD, numerical optimization supported by k-means clustering (Sing and Yang [1]) are made, and several excellent new V-shaped devices are found. Film cooling performance of the optimized devices results are validated by the experiment using PSP method.
Interpretation of the 勿/毋+巳+V/(于)+N and Other Related Constructions in Shang Chinese: Part I
Ken-ichi TAKASHIMA 세계한자학회 2023 世界漢字硏究 Vol.6 No.2
This paper attempts to show that the word s? 巳(祀) used after the negative w? 勿 or w? 毋 functions as a “Vintransitive” (all the abbreviations and references used in this paper are given at the end of Part I). As such, it forms a VP, 勿/毋V1V2, where V2 is always one of the six “Type-A ritual Vs”—one being d?o 禱 ‘to pray’, the rest given in the paper. The semantic relationship between V1 (巳/祀) and V2 is closely examined. There are also inscriptions in which V1 is used before y? 于, a “multidirectional” preposition. This is labelled as “Nloc in the sense of ‘in, at’ (not ‘to, for’)” in the construction given in the title. The paper accounts for its motive principle. The paper argues that 巳/祀 is a Vaction meaning “conduct s?-providential ritual”. It was done at a place to seek divine direction and guidance from the deity or Power believed to have dwelt in situ. Originally presented in Takashima (2009a), this paper delves further into linguistic, philological, and cultural aspects of the 巳-ritual couched in the VP, 勿/毋V1(=巳/祀)V2. A major reason for its use is to contrast the 巳-ritual with other rituals and sacrifices. The details will be explained with examples. Part I covers “Examination I: Zh? Sh?ngy?’s Questions and Zh?ng Y?j?n’s Interpretation”. The paper answers the former and evaluates the latter. Part II begins with “Examination II: Qi? X?gu?’s Interpretation” and ends with the conclusions of the entire paper.
Ken-ichi Kamo,Atsushi Yoshimoto 한국산림과학회 2013 Forest Science And Technology Vol.9 No.2
Growth models are in general constructed by some kind of mathematical function, so-called “growth function”. Since there are several possible growth functions, the first task for the growth analysis is to select the most suitable growth function for the target data among candidates. In this paper, three statistical procedures are presented and compared on the basis of the information criterion for the purpose of selecting a growth function. A demonstrative example is provided to show how the three statistical procedures differ and select different growth functions for the same growth data, and how differently the amount of carbon sequestrated in a forest stand is affected by the selected growth function.
Integrated Waste Management and Recycling for ELV in Japan
( Ken-ichi Sasaki ) 한국폐기물자원순환학회(구 한국폐기물학회) 2019 ISSE 초록집 Vol.2019 No.-
In Japan, the Law for the Recycling of End-of-Life Vehicles was enacted in 2002 and was enforced in full scale in 2005. This law greatly improved environmental conditions by obliging stakeholders, especially automobile manufacturers, to carry out appropriate roles. Specifically, the number of illegal dumping and improper storage nationwide has decreased to less than 5% before the enforcement of the law, and the recycling rate including heat utilization has been continuously exceeding 95% in recent several years. Moreover, the latest report shows the recycling rate of shredder residue is 98.2% and that of air bag is 94% in 2017. This time, we the DOWA group, as Japan's largest private enterprise in the field of waste management/recycling, review and present the followings: - Reasons and factors why the system prescribed by the law in Japan was steadily taken root - Effectiveness of WtE and metal recycling using shredder residue as a raw material - Our recent recycling efforts for hybrid/electric vehicles
A Multiobjective Model for Locating Drop-off Boxes for Collecting Used Products
Ken-ichi Tanaka,Hirokazu Kobayashi,Kenji Yura 대한산업공학회 2013 Industrial Engineeering & Management Systems Vol.12 No.4
This paper proposes a multiobjective model describing the trade-offs involved in selecting the locations of drop-off boxes for collecting used products and transporting these products to designated locations. We assume the following reverse flow of used products. Owners of used products (cellular phones, digital cameras, ink cartridges, etc.) take them to the nearest drop-off box when the distance is reasonably short. We also assume that owners living closer to drop-off boxes dispose of more used products than do owners living farther from drop-off boxes. Different types of used products are collected, with each type requiring its own drop-off box. A transportation destination for each product is specified. Three objectives are considered: maximizing the volume of used products collected at drop-off boxes; minimizing the cost of transporting collected products to designated locations; and minimizing the cost of allocating space for drop-off boxes. We formulate the above model as a multiobjective integer programming problem and generate the corresponding set of Pareto optimal solutions. We apply the model to an area using population data for Chofu City, Tokyo, Japan, and analyze the trade-offs between the objectives.