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Arima, N.,Kim, S.,Kojima, M. Springer Science + Business Media 2016 Journal of optimization theory and applications Vol.168 No.3
<P>We propose the moment cone relaxation for a class of polynomial optimization problems to extend the results on the completely positive cone programming relaxation for the quadratic optimization model by Arima, Kim and Kojima. The moment cone relaxation is constructed to take advantage of sparsity of the polynomial optimization problems, so that efficient numerical methods can be developed in the future. We establish the equivalence between the optimal value of the polynomial optimization problem and that of the moment cone relaxation under conditions similar to the ones assumed in the quadratic optimization model.</P>
Economic Evaluation of A CGS with Energy Storage Systems
Kojima, Yoshihide,Kato, Masakazu The Korean Institute of Electrical Engineers 2011 The Journal of International Council on Electrical Vol.1 No.1
Problems such as global warming and resource depletion are becoming more and more serious. End consumers are required to reduce CO2 emissions and to make effective use of energy. As measures, cogeneration systems (CGSs) and energy storage systems including heat storage and battery are considered. In this paper, optimum facility planning and economy evaluation has been performed by linear programming for a CGS with energy storage systems.
Kojima, Tatsuhiro,Choi, Wanuk,Kawano, Masaki The Royal Society of Chemistry 2014 Chemical communications Vol.50 No.89
<P>Self-assembly of the tripyridyl ligand 2,4,6-tris(4-pyridyl)triazine(TPT) and ZnI<SUB>2</SUB><I>via</I> the gas phase produced three kinds of networks: [(ZnI<SUB>2</SUB>)(TPT)]<SUB><I>n</I></SUB>; [(ZnI<SUB>2</SUB>)<SUB>3</SUB>(TPT)<SUB>2</SUB>]<SUB><I>n</I></SUB>; and [(ZnI<SUB>2</SUB>)(μ-I)(ZnI)(TPT)]<SUB><I>n</I></SUB>. [(ZnI<SUB>2</SUB>)<SUB>3</SUB>(TPT)<SUB>2</SUB>]<SUB><I>n</I></SUB> is the first example of the single crystal formation of a porous network <I>via</I> the gas phase and showed the dependence of iodine encapsulation on the crystal size.</P> <P>Graphic Abstract</P><P>Three kinds of coordination networks were selectively obtained <I>via</I> the gas phase. Thermodynamic control <I>via</I> the gas phase produced the first example of the single-crystal formation of a porous network. As a result of this single-crystal growth, we were able to show the dependence of guest encapsulation on the crystal size. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cc06342b'> </P>
The State and Meaning of the Cheng-Zhu School in 17th Century in Ningbo, Zhejiang
( Kojima Tsuyoshi ) 성균관대학교 유교문화연구소 2007 儒敎文化硏究(中文版) Vol.7 No.-
本論文通過介紹公元 17 世紀中國浙江省的思想動態,論述在思想史硏究中有必要顧及思想之地域性。具體介紹在寧波、紹興地區,與當時盛行于該地域的陽明學相對,固守傳統朱子學立場的若干人士之事例。說明雖不能稱他們爲思想家,但他們對自身所屬的“場域”(place)之思想文化的確産生了巨大影響。作者提出,爲了理解生活于“場域”(place)中的人們所具有的思想,本文使用的手法應是一種行之有效的硏究方法。 This essay introduces an intellectual trend in 17th century in Zhejiang, China. The author emphasizes the necessity for directing our attention to a kind of area studies in intellectual history. For example, some scholar-officials adhered to a tradition of the Cheng-Zhu school in Ningbo-Shaoxing area, even where the Yangmingxue was popular. While they were not professional “thinkers”, they had big influence on the intellectual culture in their “place”. The author poses utility of this method to understand what those scholar-officials thought when they lived in their “place”. [Article in Chinese]
Kojima Tsukasa,Yamasaki Yuzo,Kamitani Takeshi,Yabuuchi Hidetake,Shirasaka Takashi,Shimomiya Yamato,Kondo Masatoshi,Hamasaki Hiroshi,Kato Toyoyuki,Nagao Michinobu,Honda Hiroshi 아시아심장혈관영상의학회 2019 Cardiovascular Imaging Asia Vol.3 No.1
Objective: The smallest diagnostically sufficient amount of contrast media (CM) should be used for coronary computed tomography angiography (CCTA) to minimize the risk of contrast- induced nephrotoxicity in elderly patients with coronary artery disease. The purpose of this study was to propose dynamic-CCTA using a low dose of CM and temporal maximum intensity projection (TMIP) and to investigate its image quality compared to standard-CCTA. Materials and Methods: Participants comprised 30 patients with coronary artery disease who underwent dynamic-CCTA and standard-CCTA using 320-row CT. Dynamic-CCTA was continuously performed at mid-diastole throughout 15–25 cardiac cycles after bolus injection of CM [103 mg iodine/kg body weight (mgI/kg)]. TMIP-CCTA was reconstructed from three-phase dynamic-CCTA data, including a phase with peak enhancement of the ascending aorta. Standard-CCTA was performed using a standard CM dose (259 mgI/kg). Image quality of both TMIP-CCTA and standard-CCTA was analyzed. Results: The amount of CM used in TMIP-CCTA and standard-CCTA was 16.2±2.6 mL and 40.1±7.3 mL, respectively. The mean effective radiation dose was not significantly different between the two methods. Mean coronary attenuation was significantly lower for TMIP-CCTA than standard-CCTA [346.9±82.8 Hounsfield units (HU) vs. 455.4±75.3 HU, p<0.05]. Image noise was significantly lower for TMIP-CCTA than standard-CCTA (20.0±3.2 HU vs. 28.1± 3.6 HU, p<0.05). There were no differences in signal-to-noise ratio and visual assessment scores between the two methods. Conclusion: TMIP-CCTA can be performed using more than 50% less CM with the same image quality as standard-CCTA.
Microscale Determination of Aqueous Two Phase System Binodals by Droplet Dehydration in Oil
Kojima, Taisuke,Takayama, Shuichi American Chemical Society 2013 ANALYTICAL CHEMISTRY - Vol.85 No.10
<P>This paper analyzes the use of a dehydrating oil system to determine binodal curves of an aqueous two phase system (ATPS). Aqueous droplets containing phase-forming polymers are dehydrated at the interface between two immiscible oils. The droplets shrink due to diffusion of water into the oil phase while constantly maintaining a spherical shape. Upon sufficient dehydration, dilute one-phase solutions of phase-forming polymers separate into two phases. Comparison of the droplet diameter at this phase separation point and at the beginning allows facile calculation of the concentration of polymers that determine the binodal curve. The miniaturized droplet dehydration-based binodals obtained in this manner matched the binodals determined by the conventional diluting method but using several orders of magnitude less sample volume (150 nL droplets versus 10 mL vials).</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancham/2013/ancham.2013.85.issue-10/ac400628b/production/images/medium/ac-2013-00628b_0009.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ac400628b'>ACS Electronic Supporting Info</A></P>
AGING IN JAPAN : POPULATION POLICY IMPLICATIONS
KOJIMA, HIROSHI Institute for Social Development and Policy Resear 1995 Korea Journal of Population and Development Vol.24 No.2
This paper describes the trends in population aging in Japan and its demographic determinants and consequences. It discusses the sociocultural contexts of aging with special reference to the family. Then, it presents the results of multinomial logit analysis of data from the National Opinion Survey on Population Issues conducted by the Institute of Population Problems in 1990 to explore the possible acceptance of alternative population policies to slow populating aging.