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( Miori Ogawa ),( Hiroyuki Sagayama ),( Shinsuke Tamai ),( Reiko Momma ),( Daisuke Hoshi ),( Akiko Uchizawa ),( Go Ichikawa ),( Osamu Arisaka ),( Koichi Watanabe ) 한국운동영양학회 2021 Physical Activity and Nutrition (Phys Act Nutr) Vol.25 No.3
[Purpose] Exercise is a key factor in preventing obesity and metabolic syndrome. Sumo wrestlers increase their body size from childhood for athletic advantage; however, the risk of metabolic syndrome in junior sumo wrestlers is undetermined. Preventive measures against pediatric obesity should be initiated during childhood to prevent obesity in adulthood, considering its high global incidence. We comparatively evaluated the risk factors for metabolic syndrome in junior sumo wrestlers and children with obesity. [Methods] We enrolled 70 male children (age 9-17 years [sumo group, n = 14] and 9-14 years [other sports and non-exercise groups, n = 28 each]) and evaluated their anthropometric parameters (height, weight, body mass index z-score, obesity rate, waist circumference, waist to height ratio) and hematological parameters (total, low-density, high-density, and non-high-density lipoprotein-cholesterol; triglycerides; plasma glucose, and glycated hemoglobin levels). [Results] The BMI z-score, obesity rate, waist circumference (p < 0.05, along with the non-exercise group), and systolic blood pressure were significantly higher and the high-density cholesterol level was lower in the sumo group than in the other sports group (p < 0.05). The waist to height ratio was significantly higher in the non-exercise group than in the other sports group (p < 0.05). No significant difference was found in other blood lipid, plasma glucose (significantly lower level than the reference range in the sumo group, p < 0.05), and glycated hemoglobin (within the reference range in all groups) levels among the three groups. [Conclusion] Junior sumo wrestlers had a larger body size and higher blood pressure than children with obesity who exercised regularly. This provides direction for future research into targeted preventive interventions against metabolic syndrome for junior sumo wrestlers with large body size.
Masatoshi Ogawa,Hiroshi Endo,Hiroyuki Fukuda,Hiroyoshi Kodama,Toshio Sugimoto,Takeshi Horie,Tsugito Maruyama,Masao Kondo 제어로봇시스템학회 2013 제어로봇시스템학회 국제학술대회 논문집 Vol.2013 No.10
A cooling control method based on a model predictive control (MPC) for a modular datacenter utilizing the fresh-air is proposed. The proposed method reduces the total energy consumption of information technology (IT) equipment and cooling facilities in the data center, while considering a relationship between energy-savings and the temperature information of IT equipment. This method based on MPC controls the central processing unit (CPU) temperature in servers by facility fans for cooling. To design the proposed method, it is developed a prediction model that represents the CPU temperature by the revolution speed of facility fans, the fresh-air temperature, utilization of servers, and other factors. Furthermore, the proposed control method is applied to the actual modular data center. The energy consumption of the proposed method is compared with that of a traditional method, which has controlled the temperature difference between the inlet and outlet of the server racks based on proportional integral (PI) control. Actual comparison experiments with traditional method are provided to validate effectiveness of the proposed method. The results show that the proposed method realizes energy-savings of more than 20% compared to the traditional control method in the actual modular datacenter.
Kyoichi Ogawa,Tamon Kabata,Toru Maeda,Yoshitomo Kajino,Hiroyuki Tsuchiya 대한정형외과학회 2014 Clinics in Orthopedic Surgery Vol.6 No.2
Background: Several studies have shown that better placement of the acetabular cup and femoral stem can be achieved in total hip arthroplasty (THA) by using the computer navigation system rather than the free-hand alignment methods. However, there have been no comparisons of the relevant clinical advantages in using the computer navigation as opposed to the manual intraoperative measurement devices. The purpose of this study is to determine whether the use of computer navigation can improve postoperative leg length discrepancy (LLD) compared to the use of the measurement device. Methods: We performed a retrospective study comparing 30 computer-assisted THAs with 40 THAs performed using a simple manual measurement device. Results: The postoperative LLD was 3.0 mm (range, 0 to 8 mm) in the computer-assisted group and 2.9 mm (range, 0 to 10 mm) in the device group. Statistically significant difference was not seen between the two groups. Conclusions: The results showed good equalization of the leg lengths using both computed tomography-based navigation and the simple manual measurement device.
APPLICATION OF GIANT MAGNETOSTRICTIVE MATERIAL TO DISC BRAKE ACTUATOR
Yutaka OGAWA,Yukio MURATA,kazuo KAWASE,Hiroyuki WAKIWAKA,Tsutomu MIZUNO,Hajime YAMADA 전력전자학회 1998 ICPE(ISPE)논문집 Vol.- No.-
For the next generation railway brake system, a disc brake which can be operated directly and electrically is strongly expected. This paper deals with newly developed disc brake actuator using giant magnetostnctive materials (GMM) which can be integrated with disc brake Regarding the brake system performance, a better delay time was also attained which will contribute to shorten a stopping distance.<br/>
Yuki Fujii,Yoshihide Kanno,Shinsuke Koshita,Takahisa Ogawa,Hiroaki Kusunose,Kaori Masu,Toshitaka Sakai,Keisuke Yonamine,Yujiro Kawakami,Toji Murabayashi,Fumisato Kozakai,Yutaka Noda,Hiroyuki Okada,Kei 대한소화기내시경학회 2019 Clinical Endoscopy Vol.52 No.2
Background/Aims: This study aimed to identify the predictive factors for inaccurate endoscopic ultrasound-guided fine needleaspiration (EUS-FNA) diagnosis of swollen lymph nodes without rapid on-site cytopathological evaluation. Methods: Eighty-three consecutive patients who underwent EUS-FNA for abdominal or mediastinal lymph nodes from January2008 to June 2017 were included from a prospectively maintained EUS-FNA database and retrospectively reviewed. The sensitivity,specificity, and accuracy of EUS-FNA for the detection of neoplastic diseases were calculated. Candidate factors for inaccurate diagnosis(lymph node size and location, needle type, puncture route, number of passes, and causative disease) were evaluated by comparisonbetween accurately diagnosed cases and others. Results: The final diagnosis of the punctured lymph node was classified as neoplastic (65 cases: a metastatic lymph node, malignantlymphoma, or Crow-Fukase syndrome) or non-neoplastic (18 cases: a reactive node or amyloidosis). The sensitivity, specificity, andaccuracy were 83%, 94%, and 86%, respectively. On multivariate analyses, small size of the lymph node was the sole predictive factor forinaccurate EUS-FNA diagnosis with a significant difference (odds ratios, 19.8; 95% confidence intervals, 3.15–124; p=0.0015). Conclusions: The lymph node size of <16 mm was the only independent factor associated with inaccurate EUS-FNA diagnosis ofswollen lymph nodes.
Yuho Shimizu,Tomoya Takahashi,Kenichiro Sato,Susumu Ogawa,Daisuke Cho,Yoshifumi Takahashi,Daichi Yamashiro,Yan Li,Keigo Hinakura,Ai Iizuka,Tomoki Furuya,Hiroyuki Suzuki 질병관리본부 2023 Osong Public Health and Research Persptectives Vol.14 No.5
Objectives: As the population ages worldwide, including in Japan, there is a growing expectation for older adults to remain active participants in society. The act of sharing one’s experiences and knowledge with younger generations through social engagement not only enriches the lives of older individuals, but also holds significant value for our society. In this study, we examined both positive and negative perceptions of older adults and investigated the correlation between these perceptions and generativity among older citizens. Additionally, we evaluated the impact of life satisfaction on these factors. Methods: We conducted a survey of 100 older adults in Japan (mean age, 71.68 years) and utilized multiple regression analyses, using positive and negative perceptions of older adults, life satisfaction, and demographic factors as independent variables. The sub-categories of generativity—namely, generative action, concern, and accomplishment—were used as dependent variables. Results: Participants who held a more positive perception of older adults demonstrated a higher level of generative actions and concerns. Additionally, participants who reported higher levels of life satisfaction also exhibited more generative actions, concerns, and accomplishments. Conversely, those who held a more negative perception of older adults were found to have higher levels of generative actions. Conclusion: Enhancing positive perceptions of older adults among them can boost the sub-categories of generativity. This study, which was conducted from an exploratory perspective, has several limitations, including a potential sampling bias. A more comprehensive examination of the relationship between perceptions of older adults and generativity is anticipated in future research.
Hiroki Sato,Yusuke Fujiyoshi,Hirofumi Abe,Hironari Shiwaku,Junya Shiota,Chiaki Sato,Hiroyuki Sakae,Masaki Ominami,Yoshitaka Hata,Hisashi Fukuda,Ryo Ogawa,Jun Nakamura,Tetsuya Tatsuta,Yuichiro Ikebuchi 대한소화기 기능성질환∙운동학회 2022 Journal of Neurogastroenterology and Motility (JNM Vol.28 No.2
Background/AimsPatients with achalasia-related esophageal motility disorders (AEMDs) frequently present with dilated and sigmoid esophagus, and develop esophageal diverticulum (ED), although the prevalence and patients characteristics require further elucidation. MethodsWe conducted a multicenter cohort study of 3707 patients with AEMDs from 14 facilities in Japan. Esophagography on 3682 patients were analyzed. ResultsStraight (n = 2798), sigmoid (n = 684), and advanced sigmoid esophagus (n = 200) were diagnosed. Multivariate analysis revealed that long disease duration, advanced age, obesity, and type I achalasia correlate positively, whereas severe symptoms and integrated relaxation pressure correlate negatively with development of sigmoid esophagus. In contrast, Grade II dilation (3.5-6.0 cm) was the most common (52.9%), while grade III dilation (≥ 6 cm) was rare (5.0%). We found early onset, male, obesity, and type I achalasia correlated positively, while advanced age correlated negatively with esophageal dilation. Dilated and sigmoid esophagus were found mostly in types I and II achalasia, but typically not found in spastic disorders. The prevalence of ED was low (n = 63, 1.7%), and non-dilated esophagus and advanced age correlated with ED development. Patients with right-sided ED (n = 35) had a long disease duration (P = 0.005) with low integrated relaxation pressure values (P = 0.008) compared with patients with left-sided ED (n = 22). Patients with multiple EDs (n = 6) had lower symptom severity than patients with a single ED (P = 0.022). ConclusionsThe etiologies of dilated esophagus, sigmoid esophagus, and ED are considered multifactorial and different. Early diagnosis and optimal treatment of AEMDs are necessary to prevent these conditions.
THE NEXT-GENERATION INFRARED SPACE MISSION SPICA: PROJECT UPDATES
TAKAO NAKAGAWA,Hiroshi Shibai,HIDEHIRO KANEDA,Kotaro Kohno,Hideo Matsuhara,Hiroyuki Ogawa,TAKASHI ONAKA,Peter Roelfsema,Toru Yamada 한국천문학회 2017 天文學論叢 Vol.32 No.1
We present project updates of the next-generationinfrared space mission SPICA (Space Infrared Telescope for Cosmology and Astrophysics)as of November 2015. SPICA isoptimized for mid- and far-infrared astronomy with unprecedented sensitivity, which will be achievedwith a cryogenically cooled (below 8 K), large (2.5~m) telescope. SPICA is expected to address a number ofkey questions in various fields of astrophysics, ranging from studies of the star-formation history in theuniverse to the formation and evolution of planetary systems. The international collaboration framework of SPICA has been revisited. SPICA under the new framework passed the Mission Definition Review by JAXA in 2015. A proposal under the new framework to ESA is being prepared. The target launch year in the new framework is 2027/28.