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Hiroshi Kumagai,Koichi Toyoda,Mizunori Ezaki,Minoru Obara,Kyoichi Adachi 慶熙大學校 레이저 工學硏究所 1996 레이저공학 Vol.7 No.-
Epitaxial rare-earth (Re: Nd and Yb) and transition-metal (Tm:Cr) doped yttrium aluminum garnet (Re??:Y??Al??O??) films have been grown on various substrates by pulsed laser deposition for the purpose of fabricating diode-pumped waveguide microchip lasers. The films were characterized by Rutherford backscattering, x-ray diffraction, and photoluminescence measurements. TheseNd:YAG films on (100) silicon substrate having a large lattice mismatch show oriented stoichiometric growth. On the other hand, the films of Nd, Yb and Cr doped YAG on garnet substrates show the epitaxial growth with the smooth surfaces. Their characterization of rare-earth doped YAG thin films on various substrates was comparable to that of the rare-earth doped YAG bulk laser crystals.
Kumagai, Hozumi,Kusaba, Hitoshi,Okumura, Yuta,Komoda, Masato,Nakano, Michitaka,Tamura, Shingo,Uchida, Mayako,Nagata, Kenichiro,Arita, Shuji,Ariyama, Hiroshi,Takaishi, Shigeo,Akashi, Koichi,Baba, Eishi Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.1
Background: Antiemetic triplet therapy including dexamethasone (DEX) is widely used for patients receiving highly emetogenic chemotherapy (HEC). In Japan, the appropriate dose of DEX has not been established for this combination. Materials and Methods: To assess the efficacy and safety of increased-dose DEX, we retrospectively examined patients receiving HEC with antiemetic triplet therapy. Results: Twenty-four patients (fosaprepitant group) were given an increased-dose of DEX (average total dose: 45.8mg), fosaprepitant, and 5-HT3 antagonist. A lower-dose of DEX (33.6mg), oral aprepitant, and 5-HT3 antagonist were administered to the other 48 patients (aprepitant group). The vomiting control rates in the fosaprepitant and aprepitant groups were 100% and 85.4% in the acute phase, and were 75.0% and 64.6% in the delayed phase. The incidences of toxicity were similar comparing the two groups. Conclusions: Triplet therapy using an increased-dose of DEX is suggested to be safe and effective for patients receiving HEC.
Sugar-Rich Food Intake Is Negatively Associated with Plasma Pentraxin 3 Levels
Asako Zempo-Miyaki,Hiroshi Kumagai,Koichiro Tanahashi,Hirofumi Zempo,Takeshi Otsuki,Seiji Maeda 대한비만학회 2023 Journal of obesity & metabolic syndrome Vol.32 No.4
Background: Levels of pentraxin 3 (PTX3), an anti-inflammatory cardioprotective protein, increase after weight loss in obese men and aerobic exercise in non-obese adults. However, the effect of nutritional characteristics on PTX3 levels remains unclear. This population-based, cross-sectional study investigated the association between circulating PTX3 levels and food intake in Japanese adults. Methods: We hypothesized that the consumption of high amounts of high-sugar foods would lead to low plasma PTX3 levels, resulting in obesity. This study included 327 participants categorized depending on the consumption of the recommended amount of confectionary and sugar-sweetened beverages (CSSB) into high and low groups. Results: PTX3 levels were significantly lower in the high CSSB group than in the low CSSB group. Biological sex was the strongest effector of PTX3 levels. Moreover, the intake of Tsukudani and CSSB, as well as some metabolic syndrome factors, also affect PTX3 levels. In the groups categorized by sex and age, the determinants of PTX3 levels differed. Body mass index, waist circumference (WC), and high-density lipoprotein cholesterol (HDL-C) were significantly associated with PTX3 levels in women. Tsukudani, HDL-C, heart rate, saturated fatty acids, systolic blood pressure, and CSSB were associated with PTX3 levels in individuals aged >65 years. Conclusion: Our results show that circulating PTX3 levels are affected by sex, sugar-rich foods, and metabolic syndrome characteristics (WC, HDL-C).
Primary Multiple Cardiac Myxomas in a Patient without the Carney Complex
Shohei Kataoka,Masato Otsuka,Masayuki Goto,Mitsuru Kahata,Asako Kumagai,Koji Inoue,Hiroshi Koganei,Kenji Enta,Yasuhiro Ishii 한국심초음파학회 2016 Journal of Cardiovascular Imaging (J Cardiovasc Im Vol.24 No.1
Cardiac tumors are rare, and multiple myxomas are even rarer. The latter phenomenon is mostly associated with the Carney complex, a dominantly inherited disease characterized by multiple primary cardiac myxomas, endocrinopathy, and spotty pigmentation of the skin. We report the rare case of a patient who did not have the Carney complex but had multiple primary cardiac tumors. A 78-year-old woman with a past history of breast cancer was referred to our hospital for further examination of multiple cardiac tumors. Echocardiography showed 4 tumors in the left atrium and left ventricle. We could not diagnose them preoperatively and decided to resect them surgically because they were mobile and could have caused embolism and obstruction. The postoperative pathological findings of all 4 tumors were myxomas, although the patient did not meet the diagnostic criteria of the Carney complex. Therefore, a rare case of multiple primary cardiac myxomas was diagnosed.
Development of a Cloud Profiling FM-CW Radar at 95 GHz and its Performance
Toshiaki TAKANO,Yumiro SUGA,Ken-ichi AKITA,Youhei KAWAMURA,Kurt SAKAI,Hiroshi KUMAGAI,Hiroshi KUROIWA,Yuichi OHNO,Hiroaki Horie,Tamio TAKAMURA,Yuji NAKANISHI,Teruyuki NAKAJIMA 대한전자공학회 2003 ITC-CSCC :International Technical Conference on Ci Vol.2003 No.7
Okumura, Yasuhiro,Takamatsu, Manabu,Ohashi, Manabu,Yamamoto, Yorimasa,Yamamoto, Noriko,Kawachi, Hiroshi,Ida, Satoshi,Kumagai, Koshi,Nunobe, Souya,Hiki, Naoki,Sano, Takeshi The Korean Gastric Cancer Association 2018 Journal of gastric cancer Vol.18 No.4
A 55-year-old man visited our hospital for a detailed examination of a gastric submucosal tumor that was first detected 10 years prior. The tumor continued to grow and had developed a depressed area in its center. A histopathological examination of biopsy specimens revealed gastric adenocarcinoma of the fundic gland type (GA-FG). It was diagnosed as T2 based on the invasion depth as determined by white-light endoscopy and endoscopic ultrasonography. A total gastrectomy with lymphadenectomy was performed and a GA-FG in the mucosa and submucosa was confirmed histopathologically. However, there was a gradual transition to an infiltrative tubular adenocarcinoma with poorly differentiated components in the muscular and subserosal layers. Metastasis was identified in a dissected lymph node (LN). This is the first report of a GA-FG progressing to an aggressive cancer with LN metastasis. These findings modify our understanding of the pathophysiology of GA-FG.
Miura Kousei,Kadone Hideki,Abe Tetsuya,Koda Masao,Funayama Toru,Noguchi Hiroshi,Kumagai Hiroshi,Nagashima Katsuya,Mataki Kentaro,Shibao Yosuke,Sato Kosuke,Kawamoto Hiroaki,Sankai Yoshiyuki,Yamazaki Ma 대한척추외과학회 2021 Asian Spine Journal Vol.15 No.1
Study Design: Prospective experimental study in humans.Purpose: To determine whether the hybrid assistive limb (HAL) for Care Support can reduce lumbar load during a patient transfer.Overview of Literature: The prevalence of work-related low back pain (LBP) among nurses is high. In particular, transferring patients poses a high risk for LBP due to the large lumbar load. Attempts to reduce the lumbar load are crucial to avoid the risk of LBP. Therefore, we investigated the effects of the HAL for Care Support.Methods: Nineteen volunteers (16 men, three women) lifted a 60-kg doll from a seated position to a standing position. The first transfer was performed without the HAL for Care Support, and the second was performed with the HAL for Care Support assistive robot. We evaluated transfer performance, the visual analog scale (VAS) score for lumbar fatigue, and electromyogram analyses of the trunk and hip.Results: Four participants (two men, two women) succeeded with the HAL for Care Support even though they were unable to perform the task without it. The mean lumbar fatigue VAS score for all participants without the HAL for Care Support was 62 mm, while that with it was 43 mm. With lumbar assistance from the HAL for Care Support, subjective lumbar fatigue during the transfer decreased significantly. A power analysis indicated adequate statistical power to detect a difference in the VAS score for lumbar fatigue (0.99). The activity of the left gluteus maximus alone increased significantly during transfers with the HAL for Care Support. No adverse events occurred during use of the HAL for Care Support for transfers.Conclusions: The HAL for Care Support was able to reduce lumbar load in a simulated patient transfer.