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Recent progress in Large Helical Device experiments
Akio Komori,T. Shimozuma,T. Ido,T. Kobuchi,T. Seki,T. Ozaki,T. Fujita,T. Watari,T. Akiyama,T. Tokuzawa,T. Uda,T. Minami,Y. Nakamura,Y. Torii,Y. Sakamoto,Y. Takeiri,Y. Nagayama,Y. Oka,Y. Narushima,Y. Y 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
In the Large Helical Device (LHD), some reactor-oriented experiments, i.e. high beta, high ion temperature, steady state operation, have produced remarkable progress in recent experimental campaigns. By optimizing the rotational transform, an average beta value of 4.3 %, which is the highest on record for helical devices, was achieved. The ICRF sustained steady-state discharges for more than 30 minutes, these were also successfully performed with the aid of the magnetic axis swing technique for the reduction of the heat load to the plasma-facing component. In the discharge, the total input energy to the plasma reached 1.3 GJ, which also established a new record.1
Electrostatic Electron Cyclotron Harmonic Waves as a Candidate to Cause Pulsating Auroras
Fukizawa, M.,Sakanoi, T.,Miyoshi, Y.,Hosokawa, K.,Shiokawa, K.,Katoh, Y.,Kazama, Y.,Kumamoto, A.,Tsuchiya, F.,Miyashita, Y.,Tanaka, Y. ‐,M.,Kasahara, Y.,Ozaki, M.,Matsuoka, A.,Matsuda, S.,Hikish American Geophysical Union 2018 Geophysical research letters Vol.45 No.23
Ivy H.Y. Ng,Kitty K.T. Cheung,Tiffany T.L. Yau,Elaine Chow,Risa Ozaki,Juliana CN Chan 대한내분비학회 2018 Endocrinology and metabolism Vol.33 No.1
The rapid increase in diabetes prevalence globally has contributed to large increases in health care expenditure on diabetic complications,posing a major health burden to countries worldwide. Asians are commonly observed to have poorer β-cell function and greaterinsulin resistance compared to the Caucasian population, which is attributed by their lower lean body mass and central obesity. This “double phenotype” as well as the rising prevalence of young onset diabetes in Asia has placed Asians with diabetes at high riskof cardiovascular and renal complications, with cancer emerging as an important cause of morbidity and mortality. The experiencefrom Hong Kong had demonstrated that a multifaceted approach, involving team-based integrated care, information technologicaladvances, and patient empowerment programs were able to reduce the incidence of diabetic complications, hospitalizations, andmortality. System change and public policies to enhance implementation of such programs may provide solutions to combat the burgeoninghealth problem of diabetes at a societal level.
A.Sawatari,M.Sawaguchi,Y.Ozaki 한국펄프·종이공학회 1999 한국펄프종이학회 기타 간행물 Vol.- No.-
The handsheets were prepared from softwood bleached sulfate pulp added with a soap-type rosin sizing agent. The rosin sizing agents on the surface of the handsheets were chemically modified with OsO₄ vapor. The rosin existing in the surface layer of the depth of 10nm and 1nm were characterized by using ESCA and TOF-SIMS, respectively. The results show that the rosin sizing agents in the very thin surface layer were well characterized by OsOf peak intensities in ESCA. OsOf peak intensities increased with the increase in the added amount of rosin.<br/> However, the secondary negative ion intensity were not properly characterized in TOF-SIMS, because the secondary OsOx ions intensity had a minimum with the increase in the added amount of rosin. The positive ion intensity originated from the other site than Os atom showed a proper characterization.
Structural evolution of graphene in air at the electrical breakdown limit
Son, J.,Choi, M.,Choi, H.,Kim, S.J.,Kim, S.,Lee, K.R.,Vantasin, S.,Tanabe, I.,Cha, J.,Ozaki, Y.,Hong, B.H.,Yang, I.S.,Hong, J. Pergamon Press ; Elsevier Science Ltd 2016 Carbon Vol.99 No.-
<P>In application of graphene to real electronics, understanding the mechanism of the electrical breakdown of the graphene in harsh environments should precede many activities in tamed conditions. In this article, we report the unusual structural evolution of microbridge graphene in air near the electrical current-breakdown limit. In-situ micro-Raman study revealed that Joule heating near the electrical breakdown gave rise to a substantial structural evolution: a previously unknown broad amorphous-like and partially reversible phase at an on-and off-current of similar to 3.0 X 10(8) A/cm(2), which finally drove the phase to the electrical current-breakdown. Our calculations suggest that the phase originates from the broken symmetry caused by defect formations during Joule heating. In particular, these formations are bonds of carbon-oxygen and vacancies-oxygen. A collection of energetically favorable vacancies-oxygen pairs results in porous graphene, and its evolution can be the key to understanding how the breakdown starts and propagates in graphene under high current density in air. (C) 2015 Elsevier Ltd. All rights reserved.</P>