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Search Results: 1 - 10 of 1011 matches for " Hideyuki Noguchi "
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Hexagonal Nano-Crystalline BCN Films Grown on Si (100) Substrate Studied by X-Ray Absorption Spectroscopy  [PDF]
Md. Abdul Mannan, Yuji Baba, Norie Hirao, Tetsuya Kida, Masamitsu Nagano, Hideyuki Noguchi
Materials Sciences and Applications (MSA) , 2013, DOI: 10.4236/msa.2013.45A003
Abstract:

Hexagonal nano-crystalline boron carbonitride (h-BCN) films grown on Si (100) substrate have been precisely investigated. The films were synthesized by radio frequency plasma enhanced chemical vapor deposition using tris-dimethylamino borane as a single-source molecular precursor. The deposition was performed by setting RF power at 400 - 800 W. The reaction pressure was at 2.6 Pa and the substrate temperature was recorded at 700°C - 800°C. Formation of the nano-crystalline h-BCN compound has been confirmed by X-ray diffraction analysis. The diffraction peaks at 26.3° together with a small unknown peak at 29.2° were elucidated due to the formation of an h-BCN structure. The films composed of B, C, and N atoms with different B-N, B-C, C-N chemical bonds in forming the sp2-BCN atomic configuration studied by X-ray photoelectron spectroscopy. Orientation and local structures of the h-BCN hybrid were studied by near-edge X-ray absorption fine structure (NEXAFS) measurements. The dominant presence of p* and s* resonance peaks of the sp2

Synthesis of Hexagonal Boron Carbonitride without Nitrogen Void Defects  [PDF]
Md. Abdul Mannan, Yuji Baba, Tetsuya Kida, Masamitsu Nagano, Hideyuki Noguchi
Materials Sciences and Applications (MSA) , 2015, DOI: 10.4236/msa.2015.65041
Abstract: The synthesis and structure of hexagonal boron carbonitride (h-BCN) film on polycrystalline diamond surface were reported. Polycrystalline diamond and/or diamond-like carbon were first fabricated on Si (100) and then diamond like carbon was used as substrate. The deposition was performed by radio frequency plasma enhanced chemical vapor deposition. In order to reduce the content of nitrogen void defects, the deposition was performed at the high temperature of 950°C under the working pressure of 2.6 Pa. The typical sample with atomic composition of B31 C37 N26 O6 in the h-BCN lattice was characterized by X-ray photoelectron spectroscopy. The fine structure of the film was studied by near-edge X-ray absorption fine structure (NEXAFS) measurements. The B K-edge and N K-edge of NEXAFS spectra revealed that the synthesized h-BCN film had the ideal honeycomb- like BN3 configuration without nitrogen void defects.
Orientation of One-Dimensional Silicon Polymer Films Studied by X-Ray Absorption Spectroscopy
Md. Abdul Mannan,Yuji Baba,Tetsuhiro Sekiguchi,Iwao Shimoyama,Norie Hirao,Masamitsu Nagano,Hideyuki Noguchi
Journal of Nanomaterials , 2012, DOI: 10.1155/2012/528256
Abstract: Molecular orientations for thin films of one-dimensional silicon polymers grown by vacuum evaporation have been assigned by near-edge X-ray absorption fine structure (NEXAFS) using linearly polarized synchrotron radiation. The polymer investigated was polydimethylsilane (PDMS) which is the simplest stable silicon polymer, and one of the candidate materials for one-dimensional molecular wire. For PDMS films deposited on highly oriented pyrolytic graphite (HOPG), four resonance peaks have been identified in the Si K-edge NEXAFS spectra. Among these peaks, the intensities of the two peaks lower-energy at 1842.0 eV and 1843.2 eV were found to be strongly polarization dependent. The peaks are assigned to the resonance excitations from the Si 1s to   and px orbitals localized at the Si–C and Si–Si bonds, respectively. Quantitative evaluation of the polarization dependence of the NEXAFS spectra revealed that the molecules are self-assembled on HOPG surface, and the backbones of the PDMS are oriented nearly parallel to the surface. The observed orientation is opposite to the previously observed results for PDMS on the other surfaces such as oxide (indium tin oxide) and metal (polycrystalline copper). The flat-lying feature of PDMS observed only on HOPG surface is attributed to the interaction between CH bonds in PDMS and π orbitals in HOPG surface.
Multi-Name Extension to the Credit Grades and an Efficient Monte Carlo Method  [PDF]
Hideyuki Takada
Journal of Mathematical Finance (JMF) , 2014, DOI: 10.4236/jmf.2014.43017
Abstract:

In this paper, we present a multi-name incomplete information structural model which possess the contagion mechanism and its efficient Monte Carlo algorithm based on Interacting Particle System. Along with the Credit Grades, which is industrially used single-name credit model, we suppose that investors can observe firm values and defaults but are not informed of the threshold level at which a firm is deemed to default. Additionally, in order to model the possibility of crisis normalization, we introduce the concept of memory period after default. During the memory period after a default, public investors remember when the previous default occurred and directly reflect that information for updating their belief. When the memory period after a default finish, investors forget about that default and shift their interest to recent defaults if exist. One of the variance reduction techniques, relying upon Interacting Particle System, is combined with the standard Monte Carlo method to address the rare but critical events represented by the tail of loss distribution of portfolio.

Engineering Management Framework to Achieve Safety of a Service of an Organization Based on Social Acceptance  [PDF]
Yuichi Otsuka, Hiroshi Noguchi
Open Journal of Safety Science and Technology (OJSST) , 2012, DOI: 10.4236/ojsst.2012.21003
Abstract: We aim at a management framework of an organization in order to achieve its safety in a limited case for a system in-volving the organization for the service, its users and the surrounding society. The proposed framework is possible to allow safety managers to specify tasks involving safety measures based on the concept of “a study of safety”. In the beginning, we discuss the definitions of safety and acceptance, which will be the target of safety management. Next, problems in which the hierarchy of components in the safety systems involves are noted. We then propose the following details of the management framework to achieve the safety of the service of the organization based on acceptance by the surrounding society. Applications of the components in the proposed framework are effectively demonstrated. The shown application can aid in visualizing a way of specification of the proposed concept in a target system.
Relationship between Abdominal Strength Measured by a Newly Developed Device and Abdominal Muscle Thickness  [PDF]
Takanori Noguchi, Shinichi Demura
Advances in Physical Education (APE) , 2014, DOI: 10.4236/ape.2014.42010
Abstract:

Although measurement of abdominal strength is important for evaluating trunk myofunction, adequate devices for these measurements have not been developed. As a consequence, the relationships between abdominal strength and abdominal muscle thickness have also not been determined. This study aimed to develop a new device for measuring abdominal strength and to examine the relationship between abdominal muscle strength and thickness. The subjects in the study included 50 young males (age, 19.1 ± 0.32 years; height, 171.0 ± 6.55 cm; weight, 69.5 ± 12.15 kg). The measurement of abdominal flexion strength had high reliability with an intra-class correlation coefficient (ICC) >0.9. The thickness of the rectus abdominis muscle was measured under two conditions using an ultrasound imaging method; relaxation and strength exertion. Abdominal muscle thickness was significantly thicker during exertion than during relaxation. Abdominal flexion strength showed a significant correlation with muscle thickness during both relaxation (r = 0.69) and strength exertion (r = 0.71). No significant difference was found between these correlation coefficients. In conclusion, the values of abdominal strength determined by our newly-developed measuring device had high reliability, with abdominal flexion strength showing a relatively close relationship with the thickness of the rectus abdominis during strength exertion and relaxation.

Pancreas Procurement and Preservation for Islet Transplantation: Personal Considerations
Hirofumi Noguchi
Journal of Transplantation , 2011, DOI: 10.1155/2011/783168
Abstract: Pancreatic islet transplantation is a promising option for the treatment of type 1 diabetic patients. After the successful demonstration of the Edmonton protocol, islet transplantation has advanced significantly on several fronts, including improved pancreas procurement and preservation systems. Since we frequently use pancreata from donors after cardiac death in Japan,we have applied the in situ regional organ cooling system for pancreas procurement to reduce the warm ischemic time. To reduce the apoptosis of pancreatic tissue during cold preservation, we have applied the ductal injection of preservation solution. For pancreas preservation, we use modified Kyoto solution, which is advantageous at trypsin inhibition and less collagenase inhibition. In this paper, we show pancreas procurement and preservation in our group for islet transplantation.
Mechanism of Reflex Regulation of the Gastroduodenal Function by Acupuncture
Eitaro Noguchi
Evidence-Based Complementary and Alternative Medicine , 2008, DOI: 10.1093/ecam/nem077
Abstract: Many clinical studies focus on the effects of acupuncture on digestive disorders. However, few studies describe the mechanism by which these effects are produced. We present some recent experimental work on the mechanism of acupuncture for reflex regulation of gastroduodenal function in anesthetized rats. In anesthetized rats, it has been proven that acupuncture to the abdomen excites sympathetic nerves via spinal reflexes causing inhibition of motilities while acupuncture of limbs excites vagus nerves via supraspinal reflexes causing an increase in the motilities. It has also been shown that in order to inhibit gastric motilities, acupuncture stimulation of the abdomen must be strong enough to excite group VI fibers of the afferent intercostal nerves. To increase gastric motilities, acupuncture stimulation to hind limbs must be strong enough to excite the high-threshold group III fibers of tibial nerves. It has also been shown that the neural mechanism of duodenal motility stimulation by acupuncture involves the same body regions and intensity of stimulation as that of gastric motilities. Theories regarding the underlying mechanism have proposed somato-autonomic reflexes and responses via endogenous opioids, etc., but without definitive conclusions.
Choice of Domestic Air-Sourced Solar Photovoltaic Thermal Systems through the Operational Energy Cost Implications in Scotland
Masa Noguchi
Sustainability , 2013, DOI: 10.3390/su5031256
Abstract: In Scotland, homebuilders are requested to take valiant efforts to meet the government’s ambition that all newly built homes should be carbon-neutral by 2016/17. In delivering net zero carbon homes, the application of renewable energy technologies, such as solar photovoltaic (PV) power generating systems, is almost inevitable. Cost-effectiveness of emerging green technologies is a major factor that affects stakeholders’ housing design decision-making on whether or not the innovations can be applied in practical terms. Based on the United Kingdom (UK) government’s Standard Assessment Procedure (SAP) for energy rating of dwellings, this study conducted a comparative value assessment of 19 design alternatives set. The options also included ones that encompassed both electricity and heat generation potentials of PV applications— i.e., air-sourced PV thermal (PV/T) systems. Based on the SAP simulation results, it concluded that operational energy use and cost, as well as carbon dioxide (CO 2) emission levels, can drastically be reduced particularly when a PV/T system is combined with a low-energy and high-performance mechanical ventilation with heat recovery (MVHR) system that can extract fresh air heated by PV. This study led to visualizing the cost-effectiveness of PV/T MVHR systems and identifying the economic value over 10 years at the interest rate of 10%, based on an assumption that the innovations are applied to Scottish homes today.
The Possibility of Extending the Streetcar Line in Kagoshima City, Japan
Makoto Noguchi
Solstice : Electronic Journal of Geography and Mathematics , 2002,
Abstract: The link to the fulltext on a current website is given below. Should that link fail to work, please go to this persistent URL and download the associated file for this issue. http://deepblue.lib.umich.edu/handle/2027.42/58219While you are there, take a look around and see if there are other issues and documents that are related to your interests!
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