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High thermal stable blue-emitting alkali silicate phosphor, Eu2+-activated Na2Mg2Si6O15
Masato Iwaki,Kazuma Sugimoto,Masaru Watanabe,Kazuyoshi Uematsu,Kenji Toda,Mineo Sato 한양대학교 세라믹연구소 2019 Journal of Ceramic Processing Research Vol.20 No.3
White LEDs based on near ultraviolet LED and red/green/blue phosphors have been attracted in terms of outstanding colorrendering index. In particular, we focus on the blue emitting phosphors because the commercial BaMgAl10O17:Eu2+ needs hightemperature in order to be obtained. In this study, we succeeded in synthesizing Eu2+-activated Na2Mg2Si6O15 phosphors asa single phase by the conventional solid state reaction. Eu2+-doped Na2Mg2Si6O15 phosphors showed the broad blue emissionfrom 400-550 nm due to the 4f-5d allowed transition of Eu2+ under the ultraviolet light excitation. Moreover, the emissionintensity of Eu2+-activated Na2Mg2Si6O15 phosphor at high temperature kept about 85% at 423 K, which indicated the thermalstability of Na2Mg2Si6O15:Eu2+ was extremely higher than that of other Eu2+-activated silicate phosphors. Thus, Eu2+-activatedNa2Mg2Si6O15 phosphor is able to become the novel luminescent material for White LED based on the near-ultraviolet LED.
A SUPERNOVA SEARCH WITH PUBLIC ASTRONOMICAL OBSERVATORIES IN JAPAN
YAMAOKA HITOSHI,DOI MAMORU,SHiGEYAMA TOSHIKAZU,WATANABE MASARU,YASUDA NAOKI The Korean Astronomical Society 1996 Journal of The Korean Astronomical Society Vol.29 No.suppl1
We are promoting a supernova(SN) search project with medium size (60cm-105cm) telescopes belonging to public observatories in Japan. The main purpose is to measure the SNe Ia rate, which plays an important role in the chemical and dynamical evolution of galaxies. We expect to measure the SN rate in E/SO galaxies within the $35\%$ error after 2 years run, and the longer run will give the smaller error.
Development of Water Assisted Solid State Reaction for the Ceramic Materials
Toda, Kenji,Kim, Sun Woog,Hasegawa, Takuya,Watanabe, Mizuki,Kaneko, Tatsuro,Toda, Ayano,Yamanashi, Ryota,Kumagai, Shota,Muto, Masaru,Itadani, Atsushi,Sato, Mineo,Uematsu, Kazuyoshi,Ishigaki, Tadashi,K Trans Tech Publications, Ltd. 2017 Key Engineering Materials Vol.751 No.-
<P>We report a novel soft chemical synthesis method, water assisted solid state reaction (WASSR) method. This method is very simple and can synthesize many ceramic materials just by storing or mixing raw materials added a small amount of water in a reactor at low temperature below 373 K. For example, well-crystalline SrMoO4 was obtained using the WASSR method.</P>
Factor Structure of the Targeted Inventory on Problems in Schizophrenia
Shoji Tanaka,Takanori Nagase,Takefumi Suzuki,Kensuke Nomura,Hiroyoshi Takeuchi,Shinichiro Nakajima,Hiroyuki Uchida,Gohei Yagi,Koichiro Watanabe,Masaru Mimura 대한정신약물학회 2013 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.11 No.1
Objective: The aim of this study was to explore the factor structure of a novel, 10-item rating scale, the Targeted Inventory on Problems in Schizophrenia (TIP-Sz). Determining the factor structure will be useful in the brief evaluation of medication and non-medication treatment of the disease. Methods: An exploratory factor analysis was performed on TIP-Sz scores obtained from 100 patients who met the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV) criteria for schizophrenia. Results: The factor analysis extracted four factors that were deemed clinically pertinent, which we labeled: disorganization, social cooperativeness, functional capacity, and emotional state. The items exhibited cross-loadings on the first three factors (i.e.,some items loaded on more than one factor). In particular, the ‘behavioral dyscontrol and disorganization,’ ‘insight and reality testing,’ and ‘overall prognostic impression’ items had comparable cross-loadings on all of the first three factors. The emotional state factor was distinct from the other factors in that the items loading on it did not cross-load on other factors. Conclusion: The TIP-Sz scale comprises factors that are associated with the psychosocial functioning and emotional state of patients, which are important outcome parameters for successful treatment of the disease.
Yoshinori Sakurai,Hiroki Tanaka,Takushi Takata,Nozomi Fujimoto,Minoru Suzuki,Shinichiro Masunaga,Yuko Kinashi,Natsuko Kondo,Masaru Narabayashi,Yosuke Nakagawa,Tsubasa Watanabe,Koji Ono,Akira Maruhashi 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.67 No.1
At the Kyoto University Research Reactor Institute (KURRI), a clinical study of boron neutron capture therapy (BNCT) using a neutron irradiation facility installed at the research nuclear reactor has been regularly performed since February 1990. As of November 2014, 510 clinical irradiations were carried out using the reactor-based system. The world’s first accelerator-based neutron irradiation system for BNCT clinical irradiation was completed at this institute in early 2009, and the clinical trial using this system was started in 2012. A shift of BCNT from special particle therapy to a general one is now in progress. To promote and support this shift, improvements to the irradiation system, as well as its preparation, and improvements in the physical engineering and the medical physics processes, such as dosimetry systems and quality assurance programs, must be considered. The recent advances in BNCT at KURRI are reported here with a focus on physical engineering and medical physics topics.
Satomi Seki,Naoko Kato,Naomi Ito,Koichiro Kinugawa,Minoru Ono,Noboru Motomura,Atsushi Yao,Masafumi Watanabe,Yasushi Imai,Norihiko Takeda,Masashi Inoue,Masaru Hatano,Keiko Kazuma 한국간호과학회 2010 Asian Nursing Research Vol.4 No.2
Purpose The aim of this study was to evaluate the validity and reliability of the Seattle Angina Questionnaire, Japanese version (SAQ-J) as a disease-specific health outcome scale in patients with coronary artery disease. Methods Patients with coronary artery disease were recruited from a university hospital in Tokyo. The patients completed self-administered questionnaires, and medical information was obtained from the subjects’medical records. Face validity, concurrent validity evaluated using Short Form 36 (SF-36), known group differences, internal consistency, and test-retest reliability were statistically analyzed. Results A total of 354 patients gave informed consent, and 331 of them responded (93.5%). The concurrent validity was mostly supported by the pattern of association between SAQ-J and SF-36. The patients without chest symptoms showed significantly higher SAQ-J scores than did the patients with chest symptoms in 4 domains. Cronbach’s alpha ranged from .51 to .96, meaning that internal consistency was confirmed to a certain extent. The intraclass correlation coefficient of most domains was higher than the recommended value of 0.70. The weighted kappa ranged from .24 to .57, and it was greater than .4 for 14 of the 19 items. Conclusions The SAQ-J could be a valid and reliable disease-specific scale in some part for measuring health outcomes in patients with coronary artery disease, and requires cautious use. [Asian Nursing Research 2010;4(2):57–63]