Kenji ISHIDA

Two-Dimensional Spin Dynamics in the Itinerant Ferromagnet LaCoPO Revealed by Magnetization and $^{31}$P-NMR Measurements (2009)

Sugawara, Hitoshi, Ishida, Kenji, Nakai, Yusuke, Yanagi, Hiroshi, Kamiya, Toshio, Kamihara, Yoichi, ...

We have performed magnetization and $^{31}$P-NMR measurements on the itinerant ferromagnet LaCoPO (Curie temperature $T_{\rm Curie}\sim 44$ K) with a layered structure in order to investigate spin...

NMR evidence for a residual density of states at zero energy in superconducting BaFe_2(As_{1-x}P_x)_2 (2009)

Nakai, Yusuke, Iye, Tetsuya, Kitagawa, Shunsaku, Ishida, Kenji, Kasahara, Shigeru, Shibauchi, Takasada, ...

We report ^{31}P-NMR results in optimally doped BaFe_2(As_{1-x}P_{x})_2 (x = 0.33). The nuclear spin-lattice relaxation rate T_1^{-1} and the Knight shift in the normal state indicate development of...

To What Extent Iron-Pnictide New Superconductors Have Been Clarified: A Progress Report (2009)

Ishida, Kenji, Nakai, Yusuke, Hosono, Hideo

In this review, the authors present a summary of experimental reports on newly discovered iron-based superconductors as they were known at the end of 2008. At the same time, this paper is intended to...

Systematic ^{75}As NMR studies on F-doping dependence of the low-lying excitations in iron oxypnictides LaFeAs(O_{1-x}F_{x}) (2008)

Nakai, Yusuke, Kitagawa, Shunsaku, Ishida, Kenji, Kamihara, Yoichi, Hirano, Masahiro, Hosono, Hideo

We report systematic ^{75}As NMR studies on LaFeAs(O_{1-x}F_{x}) (0.04\le x\le0.14). At x=0.04, from resistivity, spin-lattice relaxation rate 1/T_1, and NMR spectrum measurements, we found a weak...

Spin Dynamics in Iron-based Layered Superconductor (La_{0.87}Ca_{0.13})FePO Revealed by ^{31}P and ^{139}La NMR Studies (2008)

Nakai, Yusuke, Ishida, Kenji, Kamihara, Yoichi, Hirano, Masahiro, Hosono, Hideo

We report ^{31}P and ^{139}La NMR studies of (La_{0.87}Ca_{0.13})FePO, which is a family member of the recently discovered superconductor LaFeAs(O_{1-x}F_x). In the normal state, Knight shift and...

Implementation Issues of Parallel Downloading Methods for a Proxy System (2008)

Junichi Funasaka, Atsushi Kawano, Kenji Ishida

The parallel downloading technology is expected to utilize broad bandwidth and fetch a file quickly, retrieving each piece from a different server in parallel. When users retrieve a file from mirror...

Evolution from Itinerant Antiferromagnet to Unconventional Superconductor with Fluorine Doping in La(O_{1-x}F_{x})FeAs Revealed by ^{75}As and ^{139}La Nuclear Magnetic Resonance (2008)

Nakai, Yusuke, Ishida, Kenji, Kamihara, Yoichi, Hirano, Masahiro, Hosono, Hideo

We report experimental results of ^{75}As and ^{139}La nuclear magnetic resonance (NMR) in the iron-based layered La(O_{1-x}F_{x})FeAs (x= 0.0, 0.04 and 0.11) system. In the undoped LaOFeAs, 1/T_1 of...

Degradation of Clavulanic Acid During the Cultivation of Streptomyces clavuligerus; Instability of Clavulanic Acid by Metabolites and Proteins from the Strain (2008)

Ishida, Kenji, Hung, Trinh Viet, Lee, Hei-Chan, Liou, Kwang-Kyoung, Shin, Chang-Hun, Yoon, Yeo-Joon, ...

Clavulanic acid (CA) produced by Streptomyces clavuligerus is degraded during the bacterial cultivation. The degradation was examined in three different aspects, including physical, chemical, and...

Low-lying excitations at the rare-earth site due to rattling motion in the filled skutterudite LaOs_4Sb_{12} revealed by ^{139}La NMR and ^{121/123}Sb NQR (2007)

Nakai, Yusuke, Ishida, Kenji, Sugawara, Hitoshi, Kikuchi, Daisuke, Sato, Hideyuki

We report experimental results of nuclear magnetic resonance (NMR) at the La site and nuclear quadrupole resonance (NQR) at the Sb site in the filled skutterudite LaOs$_4$Sb$_{12}$. We found that the...

Ferromagnetic Quantum Critical Fluctuations and Anomalous Coexistence of Ferromagnetism and Superconductivity in UCoGe Revealed by Co-NMR and NQR Studies (2007)

Ohta, Tetsuya, Nakai, Yusuke, Ihara, Yoshihiko, Ishida, Kenji, Deguchi, Kazuhiko, Sato, Noriaki K., ...

Co nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) studies were performed in the recently discovered UCoGe, in which the ferromagnetic and superconducting (SC) transitions...

Development of a Topology Controllable Testing Environment for Mobile Ad Hoc Network Software (2007)

KAWANO, Atsushi, OHTA, Tomoyuki, MAEDA, Kaori, ISHIDA, Kenji, KAKUDA, Yoshiaki

A mobile ad hoc network is an autonomous wireless network which consists of mobile nodes without any base stations. Many routing schemes and services have been proposed for mobile ad hoc networks....

Flux line lattice state versus magnetism in electron-doped cuprate superconductor Sr_{1-x}La_{x}CuO_{2} (2007)

Satoh, Kohki H., Takeshita, Soshi, Koda, Akihiro, Kadono, Ryosuke, Ishida, Kenji, Pyon, Sunsen, ...

The microscopic details of flux line lattice state studied by muon spin rotation is reported in an electron-doped high-$T_{\rm c}$ cuprate superconductor, Sr$_{1-x}$La$_{x}$CuO$_{2}$ (SLCO,...

Adaptive Parallel Downloading Method for Proxy Systems (2007)

FUNASAKA, Junichi, KAWANO, Atsushi, ISHIDA, Kenji

Parallel downloading retrieves different pieces of a file from different servers simultaneously and so is expected to greatly shorten file fetch times. A key requirement is that the different servers...

Dynamic Peer Grouping Method Conforming with Tit-for-Tat Strategy for P2P File Distribution Systems (2007)

FUNASAKA, Junichi, YASUOKA, Hideyuki, ISHIDA, Kenji

Some major P2P file distribution systems adopt Tit-For-Tat exchange strategy, which means “initially cooperate, then respond in kind to a previous opponent's action, i.e. cooperative or not.”...

Metamagnetic Quantum Criticality Revealed by 17O-NMR in the Itinerant Metamagnet Sr3Ru2O7 (2005)

Kitagawa, Kentaro, Ishida, Kenji, Perry, Robin S., Tayama, Takashi, Sakakibara, Toshiro, Maeno, Yoshiteru

We have investigated the spin dynamics in the bilayered perovskite Sr3Ru2O7 as a function of magnetic field and temperature using 17O-NMR. This system sits close to a metamagnetic quantum critical...

$^{17}$O NMR Measurements on Superconducting Na$_{0.35}$CoO$_{2} \cdot y$H$_{2}$O (2005)

Ihara, Yoshihiko, Ishida, Kenji, Yoshimura, Kazuyoshi, Takada, Kazunori, Sasaki, Takayoshi, Sakurai, Hiroya, ...

An $^{17}$O NMR measurement was performed on nonoriented polycrystalline Na$_{0.35}$CoO$_2 \cdot y$H$_2$O with superconducting (SC) transition temperature $T_\text{c} = 4.6$ K. A weak temperature...

Investigation into the Itinerant metamagnetism of Sr3Ru2O7 for the Field Parallel to the Ruthenium Oxygen Planes (2004)

Perry, Robin S., Tayama, Takashi, Kitagawa, Kentaro, Sakakibara, Toshiro, Ishida, Kenji, Maeno, Yoshiteru

We report a detailed investigation into the metamagnetism of Sr3Ru2O7 at low temperatures for the magnetic field parallel to the ruthenium oxygen planes. The metamagnetism is studied as a function of...

Possible unconventional superconductivity in Na$_x$CoO$_2$yH$_2$O probed by $\mu$SR (2003)

Higemoto, Wataru, Ohishi, Kazuki, Koda, Akihiro, Kadono, Ryosuke, Ishida, Kenji, Takada, Kazunori, ...

The superconducting property of recently discovered sodium cobalt oxyhydrate, Na$_{0.35}$CoO$_2$1.3H$_2$O ($T_c=4.5$ K), has been studied by means of muon spin rotation/relaxation ($\mu$SR) down to 2...

Quasiparticle spin susceptibility in heavy-fermion superconductors : An NMR study compared with specific heat results (2003)

Tou, Hideki, Ishida, Kenji, Kitaoka, Yoshio

Quasi-particle spin susceptibility ($\chi^{qp}$) for various heavy-fermion (HF) superconductors are discussed on the basis of the experimental results of electronic specific heat ($\gamma_{el}$), NMR...

Bone morphogenetic protein-2 (BMP-2) and transforming growth factor-β1 (TGF-β1) alter connexin 43 phosphorylation in MC3T3-E1 Cells (2001)

Wyatt, Lance E, Chung, Chi Y, Carlsen, Brian, Iida-Klein, Akiko, Rudkin, George H, Ishida, Kenji, ...

Abstract Background Bone morphogenetic proteins (BMPs) and transforming growth factor-βs (TGF-βs) are important regulators of bone repair and regeneration. BMP-2 and TGF-β1 have been shown to...

A SURVEY ON SALMONELLA IN RECTAL SWABS OF CATTLE ON DAIRY FARMS AND STEER FEED LOTS IN HOKKAIDO (1973)

SATO, Gihei, KODAMA, Hiroshi, ODA, Chuhachiro, ICHIMURA, Koji, ISHIDA, Kenji, SATO, Akira, ...

In 1971, rectal swabs of 1,291 apparently healthy calves and cows on 280 dairy farms in Hokkaido were examined for the presence of Salmonella and one of them (0.08%) gave Salmonella johannesburg. In...

CLINICAL STUDIES ON MERCURY POISONING IN CATTLE (1956)

SONODA, Mitsuo, NAKAMURA, Ryoichi, TOO, Kimehiko, MATSUHASHI, Akira, ISHIMOTO, Hajime, SASAKI, Ryusuke, ...

The authors investigated clinically and experimentally a series of cases of mercury poisoning in cattle all over Monbetsu District in Hokkaido, from early February to May 1955. The results thus...