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Ni<sub>2</sub>X<sub>2</sub> (X=pnictide, chalcogenide, or B) based superconductors
Ronning, F.,Bauer, E.D.,Park, T.,Kurita, N.,Klimczuk, T.,Movshovich, R.,Sefat, A.S.,Mandrus, D.,Thompson, J.D. Elsevier 2009 Physica. C, Superconductivity Vol.469 No.9
<P>We review the properties of Ni-based superconductors which contain Ni2X2 (X = As, P, Bi, Si, Ge, B) planes, a common structural element found also in the recently discovered FeAs superconductors. Strong evidence for the fully gapped nature of the superconducting state has come from field dependent thermal conductivity results on BaNi2As2. Coupled with the lack of magnetism. the majority of evidence suggests that the Ni-based compounds are conventional elect ron-phonon mediated superconductors. However, the increase in T-c in LaNiAsO with doping is anomalous, and mimics the behavior in LaFeAsO. Furthermore, comparisons of the properties of Ni- and Fe-based systems show many similarities, particularly with regards to structure-property relationships. This suggests a deeper connection between the physics of the FeAs superconductors and the related Ni-based systems which deserves further investigation. (C) 2009 Elsevier B.V. All rights reserved.</P>
LANSCE Nuclear Science Facilities and Activities
Ron O. Nelson 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
Nuclear science activities at the Los Alamos Neutron Science Center (LANSCE) encompass measurements spanning the neutron energy range from thermal to 600 MeV. The neutron sources use spallation of the LANSCE 800 MeV pulsed proton beam with the time-of-flight technique to measure properties of neutron-induced reactions as a function of energy over this large energy range. Current experiments are conducted at the Lujan Center moderated neutron source, the unmoderated WNR target, and with a lead-slowing-down spectrometer. Instruments in use include the DANCE array of BaF<SUB>2</SUB> scintillators for neutron capture studies, the FIGARO array of liquid scintillator neutron detectors, the GEANIE array of high-resolution HPGe x-ray and gamma-ray detectors, and a number of fission chambers, and other detectors. The LANL capabilities for production and handling of radioactive materials coupled with the neutron sources and detectors at LANSCE are enabling new and challenging measurements for a variety of applications including nuclear energy and nuclear astrophysics. An overview of recent research and examples of results is presented.
Applying a Buddhist Paradigm of Spiritual Practice to Contemporary Martial Art/Martial Sport Study
( Ron Dziwenka ) 국제태권도학회 2014 Journal of the International Association for Taekw Vol.1 No.1
The Goryeo-era Buddhist monk Jinul (Zhina 知訥, 지눌; 1158-1210 C.E.) offered a harmonizing view of Buddhist spiritual practice by applying the then prevalent view of Korean Seon (선, 禪 [Chan], Zen; meditative contemplation) to his understanding of Chinese Chan. Jinul`s approach emphasizes the comprehensiveness and applicability of the sudden awakening/gradual cultivation (SA/GC; 돈오점수 [dono jeomsu], 頓悟漸修 [dunwu jianxui]) paradigm of Buddhist spiritual practice, valorizing it as a definitive approach to practice. My qualitative research findings garnered through interviews of long-time practitioners of martial arts/martial sports (MA/MS) support my thesis that they are applying the SA/GC paradigm in their contemporary MA/MS practice. The practice toward syncretism of sila (戒 [jie], 계 [gye], pratimoksa; knowledge and learning of technique), samadhi (三昧 [sanmei] or 定 [ding], 정 [jeong]; focused concentration), and prajna (智慧 [zhihui], 지혜 [jihye]; the continuous development of understanding and wisdom based on the enactment of sila) appears central to the potential for a practitioner to experience an instance of understanding awakening (UA); a sila/samadhi/prajna simultaneity. Long-time practitioners support the engendering, instilling, and perpetuating of a view of practice that orients them toward experiencing this syncretism and simultaneity. This should be a soteriological goal of MA/MS practice.
Ron Blankstein,Ankur Gupta,Jamal S. Rana,Khurram Nasir 대한내분비학회 2017 Endocrinology and metabolism Vol.32 No.1
Over the last two decades coronary artery calcium (CAC) scanning has emerged as a quick, safe, and inexpensive method to detectthe presence of coronary atherosclerosis. Data from multiple studies has shown that compared to individuals who do not have anycoronary calcifications, those with severe calcifications (i.e., CAC score >300) have a 10-fold increase in their risk of coronary heartdisease events and cardiovascular disease. Conversely, those that have a CAC of 0 have a very low event rate (~0.1%/year), withdata that now extends to 15 years in some studies. Thus, the most notable implication of identifying CAC in individuals who do nothave known cardiovascular disease is that it allows targeting of more aggressive therapies to those who have the highest risk of havingfuture events. Such identification of risk is especially important for individuals who are not on any therapies for coronary heartdisease, or when intensification of treatment is being considered but has an uncertain role. This review will highlight some of the recentdata on CAC testing, while focusing on the implications of those findings on patient management. The evolving role of CAC inpatients with diabetes will also be highlighted.
Conversion of Escherichia coli to Generate All Biomass Carbon from CO₂
Ron MILO 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.10
The living world is largely divided into autotrophs that convert CO₂ into biomass and heterotrophs that consume organic compounds. In spite of wide-spread interest in renewable energy storage and more sustainable food production, the engineering of industrially relevant heterotrophic model organisms to use CO₂ as their sole carbon source has so far remained an outstanding challenge. I will describe the achievement of this transformation on laboratory timescales with the help of rational design making use of constraint-based modeling. We constructed and evolved Escherichia coli to produce all its biomass carbon from CO₂. Reducing power and energy, but not carbon, are supplied via the one-carbon molecule formate, which can be produced electrochemically. Rubisco and phosphoribulokinase were co-expressed with formate dehydrogenase to enable CO₂ fixation and reduction via the Calvin-Benson-Bassham cycle. Autotrophic growth was achieved following several months of continuous laboratory evolution in a chemostat under intensifying organic carbon limitation and confirmed via isotopic labeling.