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Search Results: 1 - 10 of 2823 matches for " Takeshi Miyazaki "
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Incentives in Public and Privatized Firms under Incomplete Contracting Situations  [PDF]
Takeshi Miyazaki
Theoretical Economics Letters (TEL) , 2012, DOI: 10.4236/tel.2012.23059
Abstract: It is argued that incentives for employees in the public service agencies will necessarily be weak because of the multiple dimensions of products, multiple principals, incomplete contract, and socializing. Some empirical studies refer to incomplete contracting situations as part of the cause of the diminishing of the public sector. This work investigates the effects of privatization and ownership shares on incentive schemes for employees who work for public or privatized firms under incomplete contracting situations. Two main results are obtained. First, the incentive intensity of public firms decreases as the government has more ownership shares, and the social benefit declines. Second, privatized firms offer their employees higher-powered incentive contracts than do public firms.
Brownian motion with multiplicative noises revisited
Takeshi Kuroiwa,Kunimasa Miyazaki
Physics , 2013, DOI: 10.1088/1751-8113/47/1/012001
Abstract: The Langevin equation with multiplicative noise and state-dependent transport coefficient has to be always complemented with the proper interpretation rule of the noise, such as the Ito and Stratonovich conventions. Although the mathematical relationship between the different rules and how to translate from one rule to another are well-established, it still remains controversial what is a more {\it physically} natural rule. In this communication, we derive the overdamped Langevin equation with multiplicative noise for Brownian particles, by systematically eliminating the fast degrees of freedom of the underdamped Langevin equation. The Langevin equations obtained here vary depending on the choice of the noise conventions but they are different representations for an identical phenomenon. The results apply to multi-variable, nonequilibrium, non-stationary systems, and other general settings.
Visual Search skills in Task of Spot Difference
Sato Takeshi,Miyazaki Masami,Watanabe Takayuki
BIO Web of Conferences , 2011, DOI: 10.1051/bioconf/20110100079
Abstract: There were few data for spot of the difference searching skilled on eye movement. Especially, it was unknown how to view and recognition of spot difference quickly. The purpose of this study was to investigate the behavior of spot the difference due to the time pressure tasks. Twelve students participated in this study (average 21years old). Every subject equipped eye movement apparatus recorder (NAC EMR-9, Tokyo Japan), it was displayed gaze point of spot the difference as the stimulus pictures. The attention stimuli was same two photos it’s has spot the difference. The device was measured the spot of the difference as x and y coordinated. It was within one minute to each one recorded searching behavior. After recording gaze and eye movement coordinate apparatus was analyzed it with analytical software (EMR-dFactory ver2.12b, Tokyo Japan). The results of this study was the findings of major two skilled patterns. They gaze tracking one side that was not easily to find out the spot of difference like as inattentional blindness. And it was too quickly eye gaze movement to detected difference. The other it was equal time and trajectory on right and left stimulus picture.
Suppression of NF-κB/p65 Inhibits the Proliferation in Oral Squamous Cancer Cells  [PDF]
Naoki Anbo, Kazuhiro Ogi, Yohei Sogabe, Makoto Shimanishi, Takeshi Kaneko, Hironari Dehari, Akihiro Miyazaki, Hiroyoshi Hiratsuka
Journal of Cancer Therapy (JCT) , 2013, DOI: 10.4236/jct.2013.44100

Object: Hypoxia occurs when oxygen tension drops below normal limits, and malignant tumors often experience hypoxia, which activates the expression of genes through oxygen-sensitive transcription factors, including the hypoxiainducible factor (HIF) and the nuclear factor-κB (NF-κB). NF-κB pathway represents an attractive therapeutic target in both cancer cells and ischemic cells, which involves immune response. To investigate the expression of NF-κB target genes in oral squamous cancer carcinoma (OSCC) under hypoxia, we performed cDNA plate array analyses of 23 NF-κB-regulated genes in different cell lines. Our aim was to clarify the functions of NF-κB in OSCC under hypoxia. Results: We conducted an NF-κB reporter assay to examine NF-κB activation under hypoxia. This luciferase-based reporter assay showed that hypoxia induced NF-κB activation after 24 h of hypoxia. We also found that vascular endothelial growth factor-C (VEGF-C) of NF-κB-regulated genes was upregulated in both cell lines under hypoxia. We then tested the influence of NF-κB/p65 knockdown on these cells and NF-κB/p65 knockdown inhibited the proliferation of OSCC cells by colony assay. Conclusion: Based on these findings, we postulate that one mechanism by which hypoxic OSCC cells may involve NF-κB-mediated upregulation. Our results also indicate that the knockdown of NF-κB/p65 subunit lead to growth inhibition during hypoxia in OSCC cells. These results suggest that knockdown of NF-κB/p65 subunit could be a potential therapeutic option for patients with OSCC.

A causal relationship between right paraduodenal hernia and superior mesenteric artery syndrome: a case report
Tadaomi Fukada, Hideyasu Mukai, Fumihiko Shimamura, Takeshi Furukawa, Masaru Miyazaki
Journal of Medical Case Reports , 2010, DOI: 10.1186/1752-1947-4-159
Abstract: A 46-year-old Japanese man who had never undergone laparotomy was admitted to our hospital due to an acute abdomen. An enhanced multidetector-row computed tomography scan of our patient showed a cluster of small intestines with ischemic change in his right lateral abdominal cavity. Emergency surgery was subsequently performed, and strangulation of the distal jejunum along with incidental right paraduodenal hernia was found. His necrotic ileum was resected, and the jejunum encapsulated by the sac was repaired manually without reduction.Three days after the operation, however, our patient developed vomiting. An upper gastrointestinal series revealed a straight line cut-off sign on the third portion of his duodenum. A second enhanced multidetector-row computed tomography scan showed that he had a lower aortomesenteric angle and a shorter aortomesenteric distance compared to his condition before his right paraduodenal hernia was surgically repaired. We strongly suspected that the right paraduodenal hernia repair may have induced superior mesenteric artery syndrome. On the 21st post-operative day, duodenojejunostomy was performed because conservative management had failed.In this case, enhanced multidetector-row computed tomography, which permits reconstructed multiplanar imaging, helped us to visually identify these diseases easily. It is important to recognize that surgical repair of a right paraduodenal hernia may cause superior mesenteric artery syndrome.Paraduodenal hernia was first described in 1857, while superior mesenteric artery syndrome (SMAS) was first defined in 1861 [1]. While the occurrence of each case has been reported separately, their simultaneous occurrence and the possibility of their causal relationship have never been reported, to our knowledge. So far, there have been some reports on the use of ultrasound, upper gastrointestinal contrast studies, and computed tomography (CT) for the diagnosis of these diseases. However, the abilities of these moda
Coordinate of Unicycle Retention Return Decade Resting Phase
Miyazaki Masami,Sato Takeshi,Watanabe Takayuki,Seki Kazuyoshi
BIO Web of Conferences , 2011, DOI: 10.1051/bioconf/20110100064
Abstract: Analysis of motor skill and performance variability in task with retention affords insight about synergies underlying central nervous system control. Preferential distribution of variability in way that minimally affected the task performance suggests sophisticated neural control. In around 1990, it was adopted monocycle exercise as an educational program in all over the Japanese elementary school. Unfortunately, it was not used the monocycle in daily life. This research assesses the influence of coordinate in motor skills retention. It was measured Electromyography and accelerometer during monocycle motor tasks for ten or more year break interval. It was rapidly activated monocycle performance in all subjects. An analysis of variability in execution using motor retention to quantify performance at results offers substantially more sensitivity to coordinated variables in motor tasks.
Jamming Transition and Inherent Structures of Hard Spheres and Discs
Misaki Ozawa,Takeshi Kuroiwa,Atsushi Ikeda,Kunimasa Miyazaki
Physics , 2012,
Abstract: Recent studies show that volume fractions $\phiJ$ at the jamming transition of frictionless hard spheres and discs are not uniquely determined but exist over a continuous range. Motivated by this observation, we numerically investigate dependence of $\phiJ$ on the initial configurations of the parent fluids equilibrated at a fraction $\phiini$, before compressing to generate a jammed packing. We find that $\phiJ$ remains constant when $\phiini$ is small but sharply increases when $\phiini$ exceeds the dynamic transition point which the mode-coupling theory predicts. We carefully analyze configurational properties of both jammed packings and parent fluids and find that, while all jammed packings remain isostatic, the increase of $\phiJ$ is accompanied with subtle but distinct changes of (i) local orders, (ii) a static length scale, and (iii) an exponent of the finite size scaling. These results quantitatively support the scenario of the random first order transition theoryof the glass transition.
Characteristics of Range of Motion among Women Pro Baseball Players: A Comparison with University Men  [PDF]
Machiko Hiramoto, Toru Morihara, Tomoyuki Matsui, Yoshikazu Azuma, Kazuya Seo, Tetsuya Miyazaki, Toshiaki Eto, Yuya Watanabe, Takeshi Sukenari, Yosuke Yamada, Shuhei Morifusa, Noriyuki Kida
Advances in Physical Education (APE) , 2017, DOI: 10.4236/ape.2017.74035
Abstract: The purpose of this study was to measure range of motion among professional women baseball players and to identify specific attributes through comparison against university men players. Subjects were 53 professional women baseball players (average age 21.9±2.9 years) and 23 university men baseball players (19.8±0.8 years). Measurement of shoulder external and internal rotation, neck and thoracolumbar rotation, hip internal and external rotation, SLR and HBD revealed sex differences and laterality. Women players had higher lower limb flexibility values compared?with?men, and like men, demonstrated laterality in range of motion in the limbs and trunk. Findings from this study may?provide reference values that can be applied to women’s conditioning programs.
A Comment on Reis  [PDF]
Kenji Miyazaki
Theoretical Economics Letters (TEL) , 2011, DOI: 10.4236/tel.2011.13019
Abstract: This note gives a counterexample on Reis [1]. Using a certain family of utility functions, this note not only gives a sharper representation than that of Reis but also demonstrates that interest rate inelastic money demand does not lead to superneutrality. This implies that superneutrality does not exist when uncerinty is introduced.
Laboratory-Scale Experiments of the Methane Hydrate Dissociation Process in a Porous Media and Numerical Study for the Estimation of Permeability in Methane Hydrate Reservoir
Yasuhide Sakamoto,Takeshi Komai,Kuniyuki Miyazaki,Norio Tenma,Tsutomu Yamaguchi,George Zyvoloski
Journal of Thermodynamics , 2010, DOI: 10.1155/2010/452326
Abstract: An experimental study of the dissociation of methane hydrate (MH) by hot-water injection and depressurization was carried out at the National Institute of Advanced Industrial Science and Technology (AIST). These experiments helped us understand some important aspects of MH behavior such as how temperature, pressure, and permeability change during dissociation and gas production. In order to understand the experimental results, a model of MH dissociation in a porous media was designed and implemented in a numerical simulator. In the model, we treated the MH phase as a two-component system by representing the pore space occupied by MH as a separate component. Absolute permeability and relative permeability were formulated as a function of MH saturation, porosity, and sand grain diameter and introduced into the numerical model. Using the developed numerical simulator, we attempted history matching of laboratory-scale experiments of the MH dissociation process. It was found that numerical simulator was able to reproduce temperature change, permeability characteristics, and gas production behavior associated with both MH formation and dissociation.
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