Endocrine Aspect of Male Infertility

Oshima, Hiroyuki The Korean Society for Reproductive Medicine 1977 Clinical and Experimental Reproductive Medicine Vol.4 No.1

Perception of Cervical Cancer Screening Among Japanese University Students Who Have Never Had a Pap Smear: A Qualitative Study

Oshima, Sumiko,Maezawa, Masaji Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.7

This study aimed to explore attitudes towards cervical cancer screening among Japanese university students who had never had a Pap smear. Four focus-group discussions, each with 15 female university students, took place in November and December 2009. Discussions were recorded and transcripts were analyzed to extract attitudes of young women towards cervical cancer screening. The four themes that emerged were: i) a low sense of reality about cervical cancer; ii) a lack of knowledge about both cervical cancer and Pap smears; iii) a lack of motivation to get screened, and iv) a reluctance to visit the gynecologist. Participants who were interested in undergoing screening for cervical cancer cited the influence of conversations with friends and family, a diagnosis of cancer within their family, and relevant information from the media. The results indicate the importance of getting young women more interested in cervical cancer screening and overcoming their tendency to avoid visiting a gynecologist.

Efficiency Increase and Input Power Decrease of Converted Prototype Pump Performance

Oshima, Masao Korean Society for Fluid machinery 2016 International journal of fluid machinery and syste Vol.9 No.3

The performance of a prototype pump converted from that of its model pump shows an increase in efficiency brought about by a decrease in friction loss. As the friction force working on impeller blades causes partial peripheral motion on the outlet flow from the impeller, the increase in the prototype's efficiency causes also a decrease in its input power. This paper discusses results of analyses on the behavior of the theoretical head or input power of a prototype pump. The equation of friction-drag coefficient for a flat plate was applied for the analysis of hydraulic loss in impeller blade passages. It was revealed that the friction-drag of a flat plate could be, to a certain degree, substituted for the friction drag of impeller blades, i.e. as a means for analyzing the relationship between a prototype pump's efficiency increase and input power decrease.

Damage assessment of a bridge based on mode shapes estimated by responses of passing vehicles

Oshima, Yoshinobu,Yamamoto, Kyosuke,Sugiura, Kunitomo Techno-Press 2014 Smart Structures and Systems, An International Jou Vol.13 No.5

In this study, an indirect approach is developed for assessing the state of a bridge on the basis of mode shapes estimated by the responses of passing vehicles. Two types of damages, i.e., immobilization of a support and decrease in beam stiffness at the center, are evaluated with varying degrees of road roughness and measurement noise. The assessment theory's feasibility is verified through numerical simulations of interactive vibration between a two-dimensional beam and passing vehicles modeled simply as sprung mass. It is determined that the damage state can be recognized by the estimated mode shapes when the beam incurs severe damage, such as immobilization of rotational support, and the responses contain no noise. However, the developed theory has low robustness against noise. Therefore, numerous measurements are needed for damage identification when the measurement is contaminated with noise.

Soft X-ray Nano-spectroscopy for Electronic Structures of Transition Metal Oxide Nano-structures

Oshima, Masaharu The Korean Vacuum Society 2014 Applied Science and Convergence Technology Vol.23 No.6

In order to develop nano-devices with much lower power consumption for beyond-CMOS applications, the fundamental understanding and precise control of the electronic properties of ultrathin transition metal oxide (TMO) films are strongly required. The metal-insulator transition (MIT) is not only an important issue in solid state physics, but also a useful phenomenon for device applications like switching or memory devices. For potential use in such application, the electronic structures of MIT, observed for TMO nano-structures, have been investigated using a synchrotron radiation angle-resolved photoelectron spectroscopy system combined with a laser molecular beam epitaxy chamber and a scanning photoelectron microscopy system with 70 nm spatial resolution. In this review article, electronic structures revealed by soft X-ray nano-spectroscopy are presented for i) polarity-dependent MIT and thickness-dependent MIT of TMO ultrathin films of $LaAlO_3/SrTiO_3$ and $SrVO_3/SrTiO_3$, respectively, and ii) electric field-induced MIT of TMO nano-structures showing resistance switching behaviors due to interfacial redox reactions and/or filamentary path formation. These electronic structures have been successfully correlated with the electrical properties of nano-structured films and nano-devices.

일본의 대외경제정책과 한-일 FTA

Oshima Shotaro(大島 正太郞) 세계경제연구원 2006 세계경제연구원 간행물 Vol.6 No.4

Effect of Potential Model Pruning on Official-Sized Board in Monte-Carlo GO

Oshima-So, Makoto International Journal of Computer ScienceNetwork S 2021 International journal of computer science and netw Vol.21 No.6

Monte-Carlo GO is a computer GO program that is sufficiently competent without using knowledge expressions of IGO. Although it is computationally intensive, the computational complexity can be reduced by properly pruning the IGO game tree. Here, I achieve this by using a potential model based on the knowledge expressions of IGO. The potential model treats GO stones as potentials. A specific potential distribution on the GO board results from a unique arrangement of stones on the board. Pruning using the potential model categorizes legal moves into effective and ineffective moves in accordance with the potential threshold. Here, certain pruning strategies based on potentials and potential gradients are experimentally evaluated. For different-sized boards, including an official-sized board, the effects of pruning strategies are evaluated in terms of their robustness. I successfully demonstrate pruning using a potential model to reduce the computational complexity of GO as well as the robustness of this effect across different-sized boards.

Evaluation of peri-implant bone defects on cone-beam computed tomography and the diagnostic accuracy of detecting these defects on panoramic images

Oshima Takayuki,Asaumi Rieko,Ogura Shin,Kawai Taisuke 대한영상치의학회 2024 Imaging Science in Dentistry Vol.54 No.2

Purpose: This study was conducted to identify the typical sites and patterns of peri-implant bone defects on cone- beam computed tomography (CBCT) images, as well as to evaluate the detectability of the identified bone defects on panoramic images. Materials and Methods: The study population included 114 patients with a total of 367 implant fixtures. CBCT images were used to assess the presence or absence of bone defects around each implant fixture at the mesial, distal, buccal, and lingual sites. Based on the number of defect sites, the presentations of the peri-implant bone defects were categorized into 3 patterns: 1 site, 2 or 3 sites, and circumferential bone defects. Two observers independently evaluated the presence or absence of bone defects on panoramic images. The bone defect detection rate on these images was evaluated using receiver operating characteristic analysis. Results: Of the 367 implants studied, 167 (45.5%) had at least 1 site with a confirmed bone defect. The most common type of defect was circumferential, affecting 107 of the 167 implants (64.1%). Implants were most frequently placed in the mandibular molar region. The prevalence of bone defects was greatest in the maxillary premolar and mandibular molar regions. The highest kappa value was associated with the mandibular premolar region. Conclusion: The typical bone defect pattern observed was a circumferential defect surrounding the implant. The detection rate was generally higher in the molar region than in the anterior region. However, the capacity to detect partial bone defects using panoramic imaging was determined to be poor.

바이오매스 플라스틱 동향과 전망

Oshima K (사)한국포장협회 2006 包裝界 Vol.156 No.-

A Study on Performance Conversion from Model to Prototype

Masao Oshima 한국유체기계학회 2010 International journal of fluid machinery and syste Vol.3 No.3

A prototype pump performance converted from that of a model pump shows an increase in efficiency. This paper discusses whether such increase is related to an increase in pump head and/or to a decrease in input power, based on the relationship between the tangential force on impeller blades, head loss and input power. This study revealed that the efficiency increase was brought about not only by an increase in head, but also by a decrease in input power, as the tangential force on the blades constitutes a part of the input power of a pump. A solution is proposed on how the hydraulic efficiency increase of a prototype pump should be related to its head and input power.