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A Remark on Jesmanowicz' Conjecture for the Non-coprimality Case

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Acta Mathematica Sinica,English Series 2015年第8期31卷 1255-1260页

作者： takafumi MIYAZAKI Department of Mathematics College of Science and Technology Nihon University 1-8-14Kanda-SurugadaiChiyoda-kuTokyo 101-8308Japan

Let a, b, c be relatively prime positive integers such that a^2＋ b^2= c^2. Jesmanowicz＇conjecture on Pythagorean numbers states that for any positive integer N, the Diophantine equation（aN）x＋（b N）y=（cN）zhas no positive solution（x, y, z） other than x = y = z = 2. In this paper, we prove this conjecture for the case that a or b is a power of 2.

关键词： Diophantine equation Pythagorean numbers Jesmanowicz' conjecture

Expulsion of geopressured hydrothermal system along active faults and its relation to the occurrence of earthquakes in the Shinanogawa seismic belt, Japan

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Science China Earth Sciences 2005年第2期48卷 273-281页

作者： Yasue oki Osamu Sato Research Institute for Hazards in Snowy Areas Niigata University Niigata 950-2181JapanResearch Institute for Hazards in Snowy Areas Niigata UniversityNiigata 950-2181Japan

The 1995 Northern Niigata Earthquake (M 6.0) occurred at a shallow depth in the Niigata seismic gap. The anomaly areas in temperature, electrical conductivity and Cl- concentration of groundwater trend northeast as linear distribution in the epicentral area and are approximately coincident with the area of the seismic intensity 6 (JMA scale). The distributions of seismic intensity 6 and groundwater anomalies convincingly imaged the presence of a buried active fault beneath the epicentral area. The occurrence of this earthquake and the anomalies of groundwater were related to the expulsion of geopressured hydrothermal system (GHS). All epicenters of the destructive earthquakes along the Shinanogawa seismic belt are actually located in the buried active fault zones characterized by the areas of temperature and geochemical anomalies of groundwater. These earthquakes might have been triggered by the activity of GHS. The expulsion of GHS along an active fault in combination with the thermal softening of fault zone attributed to high rock temperature may reduce fracture strength of the rock, and trigger earthquake occurrence. The dimension of the anomaly area of groundwater temperature at the epicentral area reflected the scale of the earthquake fault. The linear anomaly areas of groundwater resulting from the expulsion of GHS and having no historical destructive earthquake are of the predicated areas of future destructive earthquakes. Monitoring of groundwater conditions in these areas may provide useful information regarding the future occurrence of earthquakes.

关键词： Shinanogawa seismic belt, 1995 Northern Niigata Earthquake, geopressured hydrothermal system (GHS),buried active fault, expulsion of GHS.

DESIGN AND PHOTOFUNCTIONS OF DENDRIMER-ENCAPSULATED POLY(PHENYLENEETHYNYLENE)S

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Chinese Journal of Polymer Science 2001年第2期19卷 161-166页

作者： takafumi Sato Takuzo Aida Department of Chemistry and Biotechnology Graduate School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 JapanDepartment of Chemistry and Biotechnology Graduate School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan

A series of dendrimer-encapsulated poly(phenyleneethynylene)s 4～6 were Synthesize d. The light-harvesting antenna functions of dendrimer frameworks together with the blue-light emitting activities of 4～6 were highli... 详细信息

关键词： Dendrimer Poly(phenyleneethynylene) Molecular wire Light-harvesting antenna Energy transfer

Influence of Temperature Difference Calculation Method on the Evaluation of Rankine Cycle Performance

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Journal of Thermal Science 2014年第1期23卷 68-76页

作者： takafumi.Morisaki Yasuyuki.Ikegami Graduate School of Science and Engineering.Saga University Institute of Ocean Energy Saga University

In the new century, energy and environmental problems are becoming more critical, and the development of natural energy is desired. Low-grade Thermal Energy Conversion(LTEC) is refocused as one of the renewable energy methods. The usefulness of LTEC is expected using hot springs and waste heat. In the case of the Rankine cycle using ammonia as the working fluid, the thermal properties of the working fluid changes in the evaporator. The traditional evaluation method of heat exchanger performance is the LMTD(Logarithmic Mean Temperature Difference) method. On the other hand, the GMTD(Generalized Mean Temperature Difference) method allows the variation of thermal properties in the heat exchanger. The aim of this study is to compare the two methods for the calculation of temperature differences and the corresponding influence on the total performance of the Rankine cycle that is operated using ammonia as a working fluid. As a result, the thermal efficiency of the Rankine cycle is greater than that of the LMTD method. Moreover, the computable range of the GMTD calculation method is less than that of the LMTD calculation method.

关键词： GMTD LMTD LTEC OTEC rankine cycle

An extended computational approach for point-defect equilibria in semiconductor materials

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npj Computational Materials 2022年第1期8卷 746-756页

作者： takafumi Ogawa Ayako Taguchi Akihide Kuwabara Nanostructures Research Laboratory Japan Fine Ceramics Center2-4-1 MutsunoAtsuta-kuNagoya456-8587Japan

Concentrations of intrinsic and extrinsic point defects in crystalline materials with a bandgap are typically calculated in a constant-μapproach from defect formation energies based on density functional *** this work,calculations of thermal and charge equilibria among point defects are extended to a constant-N *** two approaches for point-defect equilibria are comparatively demonstrated in the application to Mg_(2)Si doped with Li,Na,and Ag,which is a lightweight and environmentally friendly thermoelectric candidate *** results reveal the systematic behavior of defect and carrier *** dopant atoms form interstitial defects at similar concentrations to substitutional defects at the Mg sites,resulting in significantly reduced free-carrier concentrations compared to the expected *** developed procedures could be utilized to find an optimal avenue for achieving higher carrier concentrations,e.g.,with regard to annealing temperature and the concentration of dopant atoms,in various semiconductors and insulators.

关键词： defect equilibria point

Mobilization and Acquisition of Sparingly Soluble P-Sources by Brassica Cultivars under P-Starved Environment I. Differential Growth Response,P-Efficiency Characteristics and P-Remobilization

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Journal of Integrative Plant Biology 2009年第11期51卷 1008-1023页

作者： Muhammad Shahbaz Akhtar Yoko oki Tadashi Adachi Department of Environmental Management Engineering Faculty of Environmental Science and TechnologyThe Graduate School of Environmental ScienceOkayama University

Phosphorus （P） starvation is highly notorious for limiting plant growth around the globe. To combat P-starvation, plants constantly sense the changes in their environment, and elicit an elegant myriad of plastic responses and rescue strategies to enhance P-solublization and acquisition from bound soil P-forms. Relative growth responses, P-solublization and P- acquisition ability of 14 diverse Brassica cultivars grown with sparingly soluble P-sources （Rock-P （RP） and Ca3（PO4）2 （TCP）） were evaluated in a solution culture experiment. Cultivars showed considerable genetic diversity in terms of biomass accumulation, concentration and contents of P and Ca in shoots and roots, P-stress factor （PSF） and P use efficiency. Cultivars showed variable P-stress tolerance, and cultivars depicting low PSF and high P-efficiency values were better adaptable to P-starvation. In experiment 2, after initial feeding on optimum nutrition for 12 d after transplanting （DAT）, class-I （low P-tolerant （Oscar and Con-II）） and class-II （low P-sensitive （Gold Rush and RL-18）） cultivars were exposed to P-free environment for 25 d. All of the cultivars remobilized P from above ground parts to their roots during growth in P-free environment, the magnitude of which was variable in tested cultivars. P-concentrations （[P]s） at 37 DAT were higher in developing compared with developed leaves. Translocation of absorbed P from metabolically inactive to active sites in P- stressed plants may have helped class-I cultivars to establish a better rooting system, which provided a basis for enhanced P-utilization efficiency （PUE） and tolerance against P-stress. By supplying TCP and RP spatially separated from other nutrients in split root study, class-I cultivars were still able to mobilize RP and TCP more efficiently compared with class-II cultivars. To compare the growth behavior under P-stress, cultivars were grown in pots for 41 d after sowing, using a soil low in P （NaHCO3-extractable P = 3.97 mg/kg, Mehlich

关键词： Brassica Ca3(PO4)2 P-remobilization P-stress P-use efficiency P-stress factor rock phosphate.

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BPaL/BpaLM regimen:A bright future for drug-resistant tuberculosis

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Asian Pacific Journal of Tropical Medicine 2024年第8期17卷 335-337页

作者： oki Nugraha Putra Telly Purnamasari Department of Clinical and Community Pharmacy Faculty of PharmacyHang Tuah UniversitySurabayaIndonesia Pre-Clinical and Clinical Studies National Research and Innovation AgencyBogorWest JavaIndonesia

Indonesia is one of the countries with the highest burden of tuberculosis and drug-resistant tuberculosis(DR-TB)across the *** on data from the World Health Organization(WHO)Global TB Report 2023,it is estimated that there are 10000 cases of DR-TB in ***,a novel antitubercular drug,has been implemented to treat DR-TB *** was administered either a shorter(9 months)or individualized treatment regimen(18 months).However,long treatment duration with various adverse events affects patient ***,a short treatment with less medication is urgently *** 2022,the WHO announced an alternative regimen-bedaquiline,pretomanid,linezolid,and moxifloxacin(BPaLM)to treat DR-TB patients for six months without resistance to fluoroquinolones[1].This recommendation is based on previous clinical trials of TB,Zenix TB,and *** introduction of BPaL and BPaLM provided a bright future for treating DR-TB patients.

关键词： tuberculosis drug treatment

Intraspecific Variations of Phosphorus Absorption and Remobilization, P Forms, and Their Internal Buffering in Brassica Cultivars Exposed to a P-Stressed Environment

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Journal of Integrative Plant Biology 2008年第6期50卷 703-716页

作者： M. Shahbaz Akhtar Yoko oki Tadashi Adachi Department of Environmental Management Engineering Faculty of Environmental Science and Technology Graduate School of Environmental Science Okayama University CADGK and Institute of Soil and Environmental Sciences University of Agriculture Faisalabad Pakistan

Translocation of absorbed phosphorus （P） from metabolically inactive sites to active sites in plants growing under P deprivation may increase its P utilization efficiency （PUE）. Acclimation to phosphate （Pi） starvation may be caused by a differential storage pool of vacuolar P, its release, and the intensity of re-translocation of absorbed P as P starvation inducible environmental cues （PSlEC） from ambient environment. Biomass assay and three P forms, namely inorganic （Pi）, organic （Po）, and acid-soluble total （Ptas） were estimated in Brassica cultivars exposed to 10 d P deprivation in the culture media. Considering that -aPi/at denotes the rate of Pi release, Pi release velocity （RSPi） was determined as the tangent to the equations obtained for Pi f（t） at the mean point in the period of greatest Pi decrease, whereas the inverse of the RSPi was an estimate of the internal Pi buffering capacity （IBCPi）. Inter cultivar variations in size of the non-metabolic Pi pool, RSPi, re-translocation of Pi from less to more active metabolic sites, and preferential Pi source and sink compartments were evaluated under P starvation. The cultivar ＇Brown Raya＇ showed the highest Pi storage ability under adequate external P supply, and a more intensive release than ＇Rain Bow＇ and ＇Dunkled＇ under P stress. Cultivar ＇B.S.A＇ was inferior to ＇Con-l＇ in its ability to store and use Pi. Roots and upper leaves were the main sink of Pi stored in the lower and middle leaves of all cultivars and showed lower IBCPi and larger RSPi values than lower and middle leaves. In another trial, six cultivars were exposed to P-free nutrition for 29 d after initial feeding on optimum nutrition for 15 d. With variable magnitude, all of the cultivars re-translocatad P from the above ground parts to their roots under P starvation, and [P] at 44 d after transplanting was higher in developing leaves compared with developed leaves. Under P deprivation, translocation of absorbed P from metabolically inactive to ac

关键词： Brassica internal Pi buffering capacity P absorption and remobilization Pi homeostasis Pi release velocity vacuolar P

MUSCLE RESEARCH WORK WITH BRITTON CHANCE FROM IN VIVO MAGNETIC RESONANCE SPECTROSCOPY TO NEAR-INFRARED SPECTROSCOPY

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Journal of Innovative Optical Health Sciences 2011年第3期4卷 227-237页

作者： takafumi HAMAOKA KEVIN K.MCCULLY Faculty of Sport and Health Science Ritsumeikan University 1-1-1Nojihigashi KusatsuShigaJapan University of Georgia 115 Ramsey Center 330 River RoadAthensGAUSA

Britton Chance has pioneered magnetic resonance spectroscopy(MRS)and near-infrared(NIR)spectroscopy(NIRS)as noninvasive methods for measuring muscle metabolism in vivo from the late *** review honoring Britton Chance will highlight the progress that has been made in developing and utilizing MRS and NIRS technologies for evaluating skeletal muscle O_(2) dynamics and *** of MRS and NIRS technology has focused on the validity and reliability of the measurements and extending the methods in physiological and clinical *** Chance has conducted MRS and NIRS research on elite athletes and a number of chronic health conditions,including patients with chronic heart failure,peripheral vascular disease,and neuromuscular *** MRS and NIRS technologies are practical and useful for measuring human muscle metabolism,we will strive to continue Chance's legacy by advancing muscle MRS and NIRS studies.

关键词： Muscle near-infrared spectroscopy magnetic resonance spectroscopy muscle oxygenation muscle energy metabolism phosphorus metabolites intramuscular pH exercise