Rapidly rotating superfluid neutron stars in Newtonian dynamics     

Shijun Yoshida  Yoshiharu Eriguchi 《Monthly notices of the Royal Astronomical Society》2004,347(2):575-586

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Diurnal variation of CO₂ concentration, Δ¹⁴C and δ¹³C in an urban forest: estimate of the anthropogenic and biogenic CO₂ contributions     

Hiroshi A. Takahashi  Eiichi Konohira  Tetsuya Hiyama  Masayo Minami  Toshio Nakamura  Naohiro Yoshida 《Tellus. Series B, Chemical and physical meteorology》2002,54(2):97-109

Diurnal variation in the atmospheric CO₂ concentration and the carbon isotopic composition (Δ¹⁴C and δ¹³C) was measured in a forest in an urban area on 9 February 1999. The carbon isotope approach used in the present study differentiated between the quantitative contributions from anthropogenic and biogenic CO₂ sources in the urban atmosphere. The anthropogenic (fossil fuel) and biogenic (soil respiration) contributions was estimated, and they ranged from 1 to 16% and from 2 to 8% of the total atmospheric CO₂. The diurnal variation of the anthropogenic CO₂ was the major cause of the total atmospheric CO₂ variation, while the biogenic CO₂ remained relatively constant throughout the day. Estimating the contribution of soil respired CO₂ provided the mean residence time of soil respired CO₂ within the forest atmosphere.  相似文献   

Inertial modes of neutron stars with a superfluid core     

Shijun Yoshida  Umin Lee 《Monthly notices of the Royal Astronomical Society》2003,344(1):207-222

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Non-Existence of the Modified First Integral by Symplectic Integration Methods II: Kepler Problem     

Haruo Yoshida 《Celestial Mechanics and Dynamical Astronomy》2002,83(1-4):355-364

Symplectic integration methods conserve the Hamiltonian quite well because of the existence of the modified Hamiltonian as a formal conserved quantity. For a first integral of a given Hamiltonian system, the modified first integral is defined to be a formal first integral for the modified Hamiltonian. It is shown that the Runge-Lenz vector of the Kepler problem is not well conserved by symplectic methods, and that the corresponding modified first integral does not exist. This conclusion is given for a one-parameter family of symplectic methods including the symplectic Euler method and the Störmer/Verlet method.  相似文献   

Properties of cluster satellites in hydrodynamical simulations     

Giuseppe Tormen  Lauro Moscardini  Naoki Yoshida † 《Monthly notices of the Royal Astronomical Society》2004,350(4):1397-1408

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Constraints on Hf and Zr mobility in high-sulfidation epithermal systems: formation of kosnarite,KZr2(PO4)3, in the Chaquicocha gold deposit,Yanacocha district,Peru     

Dr. Artur P. Deditius  Satoshi Utsunomiya  Pablo Sanchez-Alfaro  Martin Reich  Rodney C. Ewing  Stephen E. Kesler 《Mineralium Deposita》2015,50(4):429-436

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Genetic connectivity of the coral‐eating sea star Acanthaster planci during the severe outbreak of 2006–2009 in the Society Islands,French Polynesia          下载免费PDF全文

Nina Yasuda  Coralie Taquet  Satoshi Nagai  Terutoyo Yoshida  Mehdi Adjeroud 《Marine Ecology》2015,36(3):668-678

Occasional population outbreaks of the crown‐of‐thorns sea star, Acanthaster planci, are a major threat to coral reefs across the Indo‐Pacific. The presumed association between the serial nature of these outbreaks and the long larval dispersal phase makes it important to estimate larval dispersal; many studies have examined the population genetic structure of A. planci for this purpose using different genetic markers. However, only a few have focused on reef‐scale as well as archipelago‐scale genetic structure and none has used a combination of different genetic markers with different effective population sizes. In our study, we used both mtDNA and microsatellite loci to examine A. planci population genetic structure at multiple spatial scales (from <2 km to almost 300 km) within and among four islands of the Society Archipelago, French Polynesia. Our analysis detected no significant genetic structure based on mtDNA (global F_ST = ?0.007, P = 0.997) and low levels of genetic structure using microsatellite loci (global F_ST = 0.006, P = 0.005). We found no significant isolation by distance patterns within the study area for either genetic marker. The overall genetically homogenized pattern found in both the mitochondrial and nuclear loci of A. planci in the Society Archipelago underscores the significant role of larval dispersal that may cause secondary outbreaks, as well as possible recent colonization in this area.  相似文献   

A type of second order linear ordinary differential equations with periodic coefficients for which the characteristic exponents have exact expressions     

Haruo Yoshida 《Celestial Mechanics and Dynamical Astronomy》1984,32(1):73-86

It is shown that the characteristic exponents can be exactly expressed for a type of second order linear ordinary differential equations with periodic coefficients (Hill's equation) which appear as the variational equations of certain periodic solutions of dynamical systems. Key points are the transformation of the equation to the Gauss' hypergeometric differential equation, and evaluation of the trace of monodormy matrix in the complex plane of the independent variable. Two simple examples are given for which the stability of periodic solutions is rigorously analyzed.  相似文献   

Introduction     

Satoshi Yamamoto 《Mathematical Geology》1993,25(7):757-758

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Superclusters with thermal Sunyaev–Zel'dovich effect surveys     

Antonaldo Diaferio  Adi Nusser  Naoki Yoshida  Rashid A. Sunyaev 《Monthly notices of the Royal Astronomical Society》2003,338(2):433-442

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