Hiroshi Yamashita

1 3-9 Area-based Estimation of Stereo Disparity using Hierarchical Windows (2009)

Atsushi Osa, Hiroshi Yamashita, Hidetoshi Miike

We propose a new solution to stereo matching which is combined the area-based stereo method using hierarchical windows with the pixel-based stereo methods using global optimization. The areabased...

Rigorous Simulation of Statistical Electron-Electron Interactions with Fast Multipole Acceleration and a Network of Workstations (2008)

Owen T. Carmichael, Hiroshi Yamashita, Andrew R

Rigorous simulation, which in concept is nearly linear in CPU time with micro-Ampere beam currents, has been developed for analyzing statistical electron-electron interactions in lens free regions...

密度変化を考慮したモデルによる部分予混合雰囲気中の火炎の燃え拡がり解析 (2007)

緒方, 佳典, OGATA, Yoshinori, 山本, 和弘, YAMAMOTO, Kazuhiro, 山下, 博史, YAMASHITA, Hiroshi

In this study, we have numerically investigated flame spread over solid fuel in partially premixed atmospheres, which may occur under poorly ventilated conditions, forming the combustible mixtures of...

Simulation on Soot Oxidation with NO2 and O2 in a Diesel Particulate Filter (2007)

YAMAMOTO, Kazuhiro, SATAKE, Shingo, YAMASHITA, Hiroshi, OBUCHI, Akira, UCHISAWA, Junko

Although diesel engines have an advantage of low fuel consumption in comparison with gasoline engines, exhaust gas has more particulate matters (PM) including soot. As one of the key technologies, a...

OH-HCHO同時PLIF法による乱流予混合火炎の可視化と火炎構造 (2007)

山本, 和弘, YAMAMOTO, Kazuhiro, 大西, 將博, OHNISHI, Masahiro, 林, 直樹, HAYASHI, Naoki, ...

In this study, using simultaneous OH-HCHO PLIF (Planar Laser-Induced Fluorescence) technique, we have obtained instantaneous two-dimensional flame images to investigate highly turbulent premixed...

ディーゼル微粒子の堆積とフィルタの再生課程の数値解析 (2007)

佐竹, 真吾, SATAKE, Shingo, 山本, 和弘, YAMAMOTO, Kazuhiro, 山下, 博史, YAMASHITA, Hiroshi

Recently, more strict diesel particulate emissions standards are being set in many countries. To have an advantage of low fuel consumption in comparison with gasoline engines, several improvements...

Flow Field of Turbulent Premixed Combustion in a Cyclone-Jet Combustor (2007)

YAMAMOTO, Kazuhiro, INOUE, Satoshi, YAMASHITA, Hiroshi, SHIMOKURI, Daisuke, ISHIZUKA, Satoru

The flow field in highly turbulent premixed combustion has been examined, using a cyclone-jet combustor. The shear-strain rate is obtained by PIV system. Results show that, in combustion field, mean...

乱流予混合火炎の燃焼診断に対するアセトン-OH同時PLIF計測手法の有効性の検討 (2007)

馬目, 聡, MANOME, Satoshi, 中村, 祐二, NAKAMURA, Yuji, 林, 直樹, HAYASHI, Naoki, ...

This paper described an availability of acetone-OH simultaneous PLIF scheme for combustion diagnostics on turbulent premixed flame. Distinctive signal gap is found between acetone (seeded in the...

部分予混合化によるPAHs抑制メカニズムの検討 (2006)

石井, 大祐, ISHII, Daisuke, 中村, 祐二, NAKAMURA, Yuji, 林, 直樹, HAYASHI, Naoki, ...

The depletion mechanism of polycyclic aromatic hydrocarbons (PAHs) in a partially-premixed methane-air counterflow flame is investigated. The oxygen added to fuel flow is varied in the range from...

格子ボルツマン法による転炉内二次燃焼の解析 (2006)

古賀, 輝久, KOGA, Teruhisa, 山本, 和弘, YAMAMOTO, Kazuhiro, 岸本, 康夫, KISHIMOTO, Yasuo, ...

In this study, numerical simulation on fluid flow and secondary combustion reaction in a converter has been conducted, where CO formed from the high-temperature molten steel is reacted with oxygen....

メタン・空気予混合気の着火特性に関する詳細素反応機構を考慮した数値解析 (2006)

松山, 竜佐, MATSUYAMA, Ryusuke, 山下, 博史, YAMASHITA, Hiroshi, 山本, 和弘, YAMAMOTO, Kazuhiro

Ignition is a transient combustion phenomenon and one of the most difficult and complex problems, which include a lot of physical and chemical processes, so that it has not yet been explained...

反応進行度とその勾配による非定常対向流予混合火炎の火炎構造の整理 (2006)

林, 直樹, HAYASHI, Naoki, 山下, 博史, YAMASHITA, Hiroshi, 中村, 祐二, NAKAMURA, Yuji, ...

Dominant parameters in unsteady flame structure of methane/air counterflow premixed flame are investigated by numerical simulation with detailed chemical kinetics model. Two boundary conditions are...

Membrane potential of rat ventricular myocytes responds to axial stretch in phase, amplitude and speed-dependent manners (2006)

Nishimura, Satoshi, Kawai, Yasuo, Nakajima, Toshiaki, Hosoya, Yumiko, Fujita, Hideo, Katoh, Masayoshi, ...

Objective: To elucidate the interdependence between the mechanical state of the myocardium and its electrical activity, previous studies have been performed at the cellular level. However, the...

二次元非定常予混合火炎に関する素反応機構による数値解析 (予混合火炎構造を支配する物質量としての反応進行度とその勾配の妥当性) (2005)

加藤, 敏宏, KATOH, Toshihiro, 林, 直樹, HAYASHI, Naoki, 山下, 博史, YAMASHITA, Hiroshi, ...

The flame structure of unsteady two-dimensional premixed flame is numerically simulated with elementary reaction mechanism. In order to investigate unsteady behavior, a sinusoidal fluctuation is...

乱流燃焼場のPIV計測と乱れスケールの算出 (2005)

山本, 和弘, YAMAMOTO, Kazuhiro, 井上, 聡, INOUE, Satoshi, 山下, 博史, YAMASHITA, Hiroshi, ...

We have investigated a turbulent combustion by PIV (Particle Image Velocimetry) technique. Comparing with LDV data, the validity of PIV measurement has been confirmed. Especially, the conditions of...

山下 博史 (2005)

山下,博史, ヤマシタ,ヒロシ, Yamashita,Hiroshi

山下 博史 教授,居室連絡先,最近の研究成果,担当講義,講義シラバス,伝熱燃焼工学特別実験及び演習A 伝熱燃焼工学特別実験及び演習B(後期)...

旋回流が流入する細い円管中での予混合火炎伝播挙動に関する数値解析 (2005)

永井, 秀和, NAGAI, Hidekazu, 山下, 博史, YAMASHITA, Hiroshi

The propagation characteristics of premixed flame in a narrow tube with swirling flow have been examined by the numerical calculation in order to elucidate the cooling effects of the cold tube wall...

対向流拡散火炎中のPAHs生成に与える酸素濃度の影響 (2005)

長谷川, 義朗, HASEGAWA, Yoshiro, 中村, 祐二, NAKAMURA, Yuji, 山下, 博史, YAMASHITA, Hiroshi

The effects of the oxygen concentration on polycyclic aromatic hydrocarbons (PAHs) and soot formation in a methane-air counterflow diffusion flame are investigated experimentally. The oxygen...

拡散火炎におけるNOxの非定常生成特性の解明と組合せ予測手法の検証 (燃料希釈および酸化剤予熱条件への拡張) (2004)

高石, 良伸, TAKAISHI, Yoshinobu, 山下, 博史, YAMASHITA, Hiroshi

In order to predict accurately the NOx emission of turbulent diffusion flame, we proposed the combination method based on the laminar flamelet model. In this method, the detailed kinetics calculation...

酸素富化空気を用いた対向流火炎の火炎構造およびNOx生成に関する数値解析 (速度こう配がNOx生成の抑制に与える影響) (2004)

池田, 光芳, IKEDA, Mitsuyoshi, 趙, 黛青, ZHAO, Daiqing, 山下, 博史, YAMASHITA, Hiroshi

In this study, numerical simulations for the flame structure and NOx formation of counterflow diffusion flame with oxygen-enriched air were made by using the GRI chemical reaction mechanism (NOx...

Proceedings of the symposium on representation theory 2003 (2003)

Yamashita, Hiroshi

研究代表者・世話役                 齋藤 睦(北海道大学) 山下 博(北海道大学)  ...

Proceedings of the symposium on representation theory 2003 (2003)

Yamashita, Hiroshi

研究代表者・世話役                 齋藤 睦(北海道大学) 山下 博(北海道大学)  ...

固体壁の小円孔を通過する予混合火炎の消炎に関する数値解析 (水素-空気予混合火炎の消炎機構) (2003)

藤田, 英之, FUJITA, Hideyuki, 山下, 博史, YAMASHITA, Hiroshi, 中尾, 友哉, NAKAO, Tomoya

In order to clarify the unsteady behavior and the quenching mechanism of the hydrogen-air premixed flame at a small circular hole made in the cooled plate put in the large container, the numerical...

拡散火炎におけるNOxの非定常生成特性の解明と組合せ予測手法の検証 (2003)

清水, 昭博, SHIMIZU, Akihiro, 山下, 博史, YAMASHITA, Hiroshi, 高石, 良伸, TAKAISHI, Yoshinobu, ...

In order to predict accurately the NOx emission of turbulent diffusion flame, we proposed the combination method based on the laminar flamelet model. In this method, the detailed kinetics calculation...

微小重力下での固体燃料の火炎伝播に与える速度境界層の影響 (2003)

中村, 祐二, NAKAMURA, Yuji, 恵藤, 陽介, ETOH, Yosuke, 山下, 博史, YAMASHITA, Hiroshi

Upstream (opposed) flame spread over a thermally thin cellulosic sheet in various imposed flow speed and ambient oxygen concentration under microgravity environment is studied numerically....

Myosin light chain isoforms modify force-generating ability of cardiac myosin by changing the kinetics of actin-myosin interaction (2003)

Yamashita, Hiroshi, Sugiura, Seiryo, Fujita, Hideo, Yasuda, So-ichiro, Nagai, Ryozo, Saeki, Yasutake, ...

Objective: To investigate the functional role of myosin light chain (MLC) isoforms in cardiac muscles, we examined the motor function of two different myosins the structure of which differed only in...

酸素富化空気を用いた対向流火炎の火炎構造およびNOx生成 (2002)

岸本, 衛, KISHIMOTO, Mamoru, 趙, 黛青, ZHAO, Daiqing, 山下, 博史, YAMASHITA, Hiroshi

In this study, numerical simulations of the counterflow diffusion flame and the counterflow double flame with oxygen-enriched air were made by using the GRI chemical reaction mechanism (NOx included)...

旋回流中での予混合火炎の伝播に関する数値解析 (2001)

趙, 黛青, ZHAO, Daiqing, 山下, 博史, YAMASHITA, Hiroshi

In order to clarify the rapid flame propagation mechanism along a vortex axis (the vortex bursting phenomenon), the steady state propagation characteristics of premixed flame in a vortex tube have...

Numerical Study on NOx Production of Transitional Fuel Jet Diffusion Flame (2000)

YAMASHITA, Hiroshi

A direct numerical simulation of a two-dimensional jet diffusion flame developed in a co-flowing air stream was carried out using the GRI [Gas Research Institute] chemical reaction mechanism (NOx...

On the rank of the first radical layer of a {$p$}-class group of an algebraic number field (1999)

Yamashita, Hiroshi

Let $p$ be a prime number. Let $M$ be a finite Galois extension of a finite algebraic number field $k$. Suppose that $M$ contains a primitive $p$th root of unity and that the $p$-Sylow subgroup of...

Preparation and Critical Current Density of a Bi-Based Superconducting Whisker Composite. (1998)

Funahashi, Ryoji, Matsubara, Ichiro, Kusumi, Shinji, Ogura, Toru, Yamashita, Hiroshi

This paper concerned mmc in some important way and contained information about, utilized, or discussed these subjects: basic topics:, composite materials materials and material types:, bi-2212...

Inhibition and Binding Modes of Low-Molecular-Weight Inhibitors of Porcine Pancreatic {alpha}-Amylase (1992)

Yamashita, Hiroshi, Nakatani, Hiroshi, Tonomura, Ben'ichiro

Inhibition of porcine pancreatic α-amylase (1,4-α-D-glucan glucanohydrase) [EC 3.2.1.1] with maltotriitol (G3OH) and 4-phenylimidazole was investigated by using maltohexaitol (G6OH) and...

Substrate-Selective Activation of Histidine-Modified Porcine Pancreatic {alpha}-Amylase by Chloride Ion (1991)

Yamashita, Hiroshi, Nakatani, Hiroshi, Tonomura, Ben’ichiro

Porcine pancreatic α-amylase (1,4-α-D-glucan glncanohydrolase) [EC 3.2.1.1] has both amylase activity (hydrolysis of α-l,4-D-glucoside bond of starch) and maltosidase activity (hydrolysis of...

直交流形熱交換器の伝熱性能向上に関する研究 (1978)

山下, 博史, Yamashita, Hiroshi

名古屋大学博士学位論文 学位の種類:工学博士 (課程) 学位授与年月日:昭和53年5月31日

直交流形熱交換器の伝熱性能向上に関する研究 (1978)

山下, 博史, Yamashita, Hiroshi

名古屋大学博士学位論文 学位の種類:工学博士 (課程) 学位授与年月日:昭和53年5月31日

Orexins, orexigenic hypothalamic peptides, interact with autonomic, neuroendocrine and neuroregulatory systems

Date, Yukari, Ueta, Yoichi, Yamashita, Hiroshi, Yamaguchi, Hideki, Matsukura, Shigeru, Kangawa, Kenji, ...

We determined the immunohistochemical distributions of orexin-A and orexin-B, hypothalamic peptides that function in the regulation of feeding behavior and energy homeostasis. Orexin-A and -B neurons...

Vasohibin as an endothelium-derived negative feedback regulator of angiogenesis

Watanabe, Kazuhide, Hasegawa, Yasuhiro, Yamashita, Hiroshi, Shimizu, Kazue, Ding, Yuanying, Abe, Mayumi, ...

Negative feedback is a crucial physiological regulatory mechanism, but no such regulator of angiogenesis has been established. Here we report a novel angiogenesis inhibitor that is induced in...

Isolation of a Hop-Sensitive Variant of Lactobacillus lindneri and Identification of Genetic Markers for Beer Spoilage Ability of Lactic Acid Bacteria

Suzuki, Koji, Iijima, Kazumaru, Ozaki, Kazutaka, Yamashita, Hiroshi

We have isolated a hop-sensitive variant of the beer spoilage bacterium Lactobacillus lindneri DSM 20692. The variant lost a plasmid carrying two contiguous open reading frames (ORF s) designated...

Orexins, orexigenic hypothalamic peptides, interact with autonomic, neuroendocrine and neuroregulatory systems

Date, Yukari, Ueta, Yoichi, Yamashita, Hiroshi, Yamaguchi, Hideki, Matsukura, Shigeru, Kangawa, Kenji, ...

We determined the immunohistochemical distributions of orexin-A and orexin-B, hypothalamic peptides that function in the regulation of feeding behavior and energy homeostasis. Orexin-A and -B neurons...

Vasohibin as an endothelium-derived negative feedback regulator of angiogenesis

Watanabe, Kazuhide, Hasegawa, Yasuhiro, Yamashita, Hiroshi, Shimizu, Kazue, Ding, Yuanying, Abe, Mayumi, ...

Negative feedback is a crucial physiological regulatory mechanism, but no such regulator of angiogenesis has been established. Here we report a novel angiogenesis inhibitor that is induced in...

Isolation of a Hop-Sensitive Variant of Lactobacillus lindneri and Identification of Genetic Markers for Beer Spoilage Ability of Lactic Acid Bacteria

Suzuki, Koji, Iijima, Kazumaru, Ozaki, Kazutaka, Yamashita, Hiroshi

We have isolated a hop-sensitive variant of the beer spoilage bacterium Lactobacillus lindneri DSM 20692. The variant lost a plasmid carrying two contiguous open reading frames (ORF s) designated...

Characterization of a novel aquaretic agent, OPC-31260, as an orally effective, nonpeptide vasopressin V2 receptor antagonist

Yamamura, Yoshitaka, Ogawa, Hidenori, Yamashita, Hiroshi, Chihara, Tomihiko, Miyamoto, Hisashi, Nakamura, Shigeki, ...

1 OPC-31260, a benzazepine derivative, has been studied for its ability to antagonize the binding of arginine vasopressin (AVP) to receptors in rat liver (V1) and kidney (V2) plasma membranes, for...

In vivo imaging in mice reveals local cell dynamics and inflammation in obese adipose tissue

Nishimura, Satoshi, Manabe, Ichiro, Nagasaki, Mika, Seo, Kinya, Yamashita, Hiroshi, Hosoya, Yumiko, ...

To assess physiological and pathophysiological events that involve dynamic interplay between multiple cell types, real-time, in vivo analysis is necessary. We developed a technique based on confocal...

Inhibition of N- and P/Q-type calcium channels by postsynaptic GABAB receptor activation in rat supraoptic neurones

Harayama, Nobuya, Shibuya, Izumi, Tanaka, Keiko, Kabashima, Narutoshi, Ueta, Yoichi, Yamashita, Hiroshi

Voltage-dependent Ca2+ currents of dissociated rat supraoptic nucleus (SON) neurones were measured using the whole-cell configuration of the patch-clamp technique to examine direct postsynaptic...

Evidence that multiple P2X purinoceptors are functionally expressed in rat supraoptic neurones

Shibuya, Izumi, Tanaka, Keiko, Hattori, Yukio, Uezono, Yasuhito, Harayama, Nobuya, Noguchi, Jun, ...

The expression, distribution and function of P2X purinoceptors in the supraoptic nucleus (SON) were investigated by reverse transcription-polymerase chain reaction (RT-PCR), in situ hybridization,...

Adenosine inhibits voltage-dependent Ca2+ currents in rat dissociated supraoptic neurones via A1 receptors

Noguchi, Jun, Yamashita, Hiroshi

The modulation of voltage-dependent Ca2+ currents (ICa) by adenosine was investigated in magnocellular neurones acutely dissociated from the rat hypothalamic supraoptic nucleus (SON) by using the...

Do Uric Acid Deposits in Zooxanthellae Function as Eye-Spots?

Yamashita, Hiroshi, Kobiyama, Atsushi, Koike, Kazuhiko

The symbiosis between zooxanthellae (dinoflagellate genus Symbiodinium) and corals is a fundamental basis of tropical marine ecosystems. However the physiological interactions of the hosts and...