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Search Results: 1 - 10 of 3539 matches for " Makoto Hayashi "
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On Canard Homoclinic of a Liénard Perturbation System  [PDF]
Makoto Hayashi
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.210170
Abstract: The classification on the orbits of some Liénard perturbation system with several parameters, which is relation to the example in [1] or [2], is discussed. The conditions for the parameters in order that the system has a unique limit cycle, homoclinic orbits, canards or the unique equilibrium point is globally asymptotic stable are given. The methods in our previous papers are used for the proofs.
A New Description of Nuclear Rotational Motion in terms of Intrinsic Pair Mode
Daisuke Hayashi,Makoto Ueno,Yoshinao Miyanishi
Physics , 2001,
Abstract: A new method describing nuclear rotational motion microscopically is proposed. We extract the rotational Hamiltonian by introducing the intrinsic pair modes which commute with the rotational mode. Thereby the rotational mode is not treated as zero energy mode in contrast with the conventional RPA formalism so that we circumvent the difficulty related with infrared divergence. The wave function is constructed by angular momentum projection on each intrinsic state. Without numerical integration for projection we calculate the matrix elements analytically under a certain approximation. The numerical calculations are carried out to illustrate the applicability of our method and they show that our method works well.
Intrinsic Pair Operators and the Number-conserved Treatment of Pairing Correlations in Nuclei
Makoto Ueno,Daisuke Hayashi,Yoshinao Miyanishi
Physics , 2001, DOI: 10.1143/PTP.107.231
Abstract: By introducing the intrinsic pair operators which commute with number fluctuation operator, a new formalism is given for the number-conserving description of the pairing correlations. The difficulty in the conventional RPA treatment for pairing rotation is removed.
Instability crossover of helical shear flow in segregated Bose-Einstein condensates
Shinsuke Hayashi,Makoto Tsubota,Hiromitsu Takeuchi
Physics , 2013, DOI: 10.1103/PhysRevA.87.063628
Abstract: We theoretically study the instability of helical shear flows, in which one fluid component flows along the vortex core of the other, in phase-separated two-component Bose-Einstein condensates at zero temperature. The helical shear flows are hydrodynamically classified into two regimes: (1) a helical vortex sheet, where the vorticity is localized on the cylindrical interface and the stability is described by an effective theory for ripple modes, and (2) a core-flow vortex with the vorticity distributed in the vicinity of the vortex core, where the instability phenomena are dominated only by the vortex-characteristic modes: Kelvin and varicose modes. The helical shear-flow instability shows remarkable competition among different types of instabilities in the crossover regime between the two regimes.
Human-Related Emotional Stimuli Can Cause a Hippocampal and Thalamic Over-Response in People with Unstable Personalities  [PDF]
Yuko Mizuno-Matsumoto, Takuto Hayashi, Eika Okamoto, Daisuke Miwa, Tetsuya Asakawa, Ayumi Muramatsu, Makoto Kato, Tsutomu Murata
Journal of Behavioral and Brain Science (JBBS) , 2013, DOI: 10.4236/jbbs.2013.37053
Abstract: Hippocampus is crucial for the formation of emotional memory. We found the relationship between hippocampal responses to emotional stimuli and the mental stabilities of people in our preliminary study. In this study, we have also evaluated how the emotional stimuli would affect amygdala and thalamus in the brain, and how the personality stabilities could relate to the responses in the brain using functional magnetic resonance imaging (fMRI). We evaluated the subjects personality features with the Yatabe-Guilford Personality Test (Y-G test) and psychosomatic symptoms with the Cornell Medical Index (CMI). The subjects were categorized into the mentally stable group and the mentally unstable group according to the total scores of the Y-G test and the CMI. The brain functional responses under emotional stimuli were measured using fMRI. The region of interest (ROI) analysis was performed to abstract significant changes in order to compare responses among the different emotional stimuli. We conducted the regression analysis to abstract the relationship between the mean % signal change from fMRI and the personality stability. The fMRI results showed that the hippocampus, thalamus, and right amygdala activities under the human relationship stimuli increased with ascending value of mental instability. Our findings suggest that the memory process in the hippocampus and the threat alarm system in the thalamus under the human-related stimuli crucially influence the emotional reaction of mentally unstable people. These processes in the brain would affect the event that stresses on human relationships that often cause people to suffer from mental disorders.

Tuberous sclerosis diagnosed by incidental computed tomography findings of multifocal micronodular pneumocyte hyperplasia: a case report
Ishii Makoto,Asano Koichiro,Kamiishi Nobufumi,Hayashi Yuichiro
Journal of Medical Case Reports , 2012, DOI: 10.1186/1752-1947-6-352
Abstract: Introduction The majority of multifocal micronodular pneumocyte hyperplasia associated with tuberous sclerosis complex is diagnosed with the classical clinical triad of seizures, mental retardation, and skin lesions. We report a rare case of tuberous sclerosis complex with no classical clinical findings, which was diagnosed through incidental computed tomography findings of multiple nodular lesions of multifocal micronodular pneumocyte hyperplasia. Case presentation A chest computed tomography scan of a 51-year-old Japanese woman showed multiple nodular ground-glass opacities that were not seen on chest X-ray. Video-assisted thoracoscopic surgery was performed. A histological examination demonstrated type II pneumocyte hyperplasia with thickened fibrotic alveolar septa, which was consistent with multifocal micronodular pneumocyte hyperplasia. Brain magnetic resonance imaging displayed multiple cortical tubers, and abdominal computed tomography showed bilateral renal angiomyolipoma. Our patient was finally diagnosed as having tuberous sclerosis complex with multifocal micronodular pneumocyte hyperplasia, although she had no episodes of epilepsy, no skin lesions, and no family history. Conclusions Multifocal micronodular pneumocyte hyperplasia with latent tuberous sclerosis complex should be considered in the differential diagnosis of multiple ground-glass opacities.
Desempenho e características de carca a do escargot francês (Helix aspersa maxima) alimentado com ra es contendo diferentes óleos vegetais
Hayashi Carmino,Soares Claudemir Martins,Matsushita Makoto,Galdioli Eliana Maria
Ciência Rural , 2004,
Abstract: Objetivando avaliar a utiliza o de óleos vegetais de diferentes origens em ra es no desempenho e características de carca a do escargot francês “gros gris” (Helix aspersa maxima), 240 animais com peso inicial médio de 0,11g, foram distribuídos em um delineamento inteiramente casualizado com seis tratamentos e quatro repeti es com dez animais cada, em aquários de 12L. As ra es foram formuladas de forma a diferirem quanto ao emprego (3 % da ra o) dos óleos de soja, canola, girassol, linha a, arroz e milho. Os valores médios de peso final, convers o alimentar, taxa de eficiência protéica, rendimento de carca a, percentagem de concha e taxa de sobrevivência dos animais alimentados com as ra es com os diferentes óleos n o diferiram (p>0,01) entre si. Os teores de umidade, cinza, proteína bruta e lipídeos totais e a rela o ácidos graxos poliinsaturados/ácidos graxos saturados da por o comestível dos animais submetidos as diferentes ra es n o foram influenciados (p>0,05). Entretanto, os animais que receberam dieta com óleo de linha a apresentaram o melhor (p<0,05) rela o w6/ w3 do que aqueles alimentados com ra es com óleos de girassol e milho. N o foram observadas diferen as (p>0,05) nos teores de umidade e cinza das conchas dos animais submetidos às diferentes ra es. Por outro lado, os animais que receberam óleo de linha a tiveram concha com menor (p<0,05) teor de proteína que aqueles que receberam ra o com óleo de soja. Concluiu-se que os óleos testados podem ser utilizados em ra es para o escargot francês em fase de crescimento, porém, o óleo de linha a promove melhor rela o de w6/ w3 do que os óleos de girassol ou de milho na por o comestível deste animal.
Direct Light-up of cAMP Derivatives in Living Cells by Click Reactions
Kenichiro Ito,Hongshan Liu,Makoto Komiyama,Tetsuya Hayashi,Yan Xu
Molecules , 2013, DOI: 10.3390/molecules181012909
Abstract: 8-Azidoadenosine 3′,5′-cyclic monophosphate (8-azido cAMP) was directly detected in living cells, by applying Cu-free azide-alkyne cycloaddition to probe cAMP derivatives by fluorescence light-up. Fluorescence emission was generated by two non-fluorescent molecules, 8-azido cAMP as a model target and difluorinated cyclooctyne (DIFO) reagent as a probe. The azide-alkyne cycloaddition reaction between 8-azido cAMP and DIFO induces fluorescence in 8-azido cAMP. The fluorescence emission serves as a way to probe 8-azido cAMP in cells.
High-speed optical correlation-domain reflectometry without using acousto-optic modulator
Makoto Shizuka,Shumpei Shimada,Neisei Hayashi,Yosuke Mizuno,Kentaro Nakamura
Physics , 2015,
Abstract: To achieve a distributed reflectivity measurement along an optical fiber, we develop a simplified cost-effective configuration of optical correlation- (or coherence-) domain reflectometry based on a synthesized optical coherence function by sinusoidal modulation. By excluding conventional optical heterodyne detection (practically, without using an acousto-optic modulator) and by exploiting the foot of the Fresnel reflection spectrum, the electrical bandwidth required for signal processing is lowered down to several megahertz. We evaluate the basic system performance and demonstrate its high-speed operation (10 ms for one scan) by tracking a moving reflection point in real time.
Derepression of the Plant Chromovirus LORE1 Induces Germline Transposition in Regenerated Plants
Eigo Fukai ,Yosuke Umehara,Shusei Sato,Makoto Endo,Hiroshi Kouchi,Makoto Hayashi,Jens Stougaard,Hirohiko Hirochika
PLOS Genetics , 2010, DOI: 10.1371/journal.pgen.1000868
Abstract: Transposable elements represent a large proportion of the eukaryotic genomes. Long Terminal Repeat (LTR) retrotransposons are very abundant and constitute the predominant family of transposable elements in plants. Recent studies have identified chromoviruses to be a widely distributed lineage of Gypsy elements. These elements contain chromodomains in their integrases, which suggests a preference for insertion into heterochromatin. In turn, this preference might have contributed to the patterning of heterochromatin observed in host genomes. Despite their potential importance for our understanding of plant genome dynamics and evolution, the regulatory mechanisms governing the behavior of chromoviruses and their activities remain largely uncharacterized. Here, we report a detailed analysis of the spatio-temporal activity of a plant chromovirus in the endogenous host. We examined LORE1a, a member of the endogenous chromovirus LORE1 family from the model legume Lotus japonicus. We found that this chromovirus is stochastically de-repressed in plant populations regenerated from de-differentiated cells and that LORE1a transposes in the male germline. Bisulfite sequencing of the 5′ LTR and its surrounding region suggests that tissue culture induces a loss of epigenetic silencing of LORE1a. Since LTR promoter activity is pollen specific, as shown by the analysis of transgenic plants containing an LTR::GUS fusion, we conclude that male germline-specific LORE1a transposition in pollen grains is controlled transcriptionally by its own cis-elements. New insertion sites of LORE1a copies were frequently found in genic regions and show no strong insertional preferences. These distinctive novel features of LORE1 indicate that this chromovirus has considerable potential for generating genetic and epigenetic diversity in the host plant population. Our results also define conditions for the use of LORE1a as a genetic tool.
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