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Influence of the Karman Vortex Street on the Broadband Noise Generated from a Multiblade Fan

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Journal of Thermal Science 2005年第3期14卷 198-205页

作者： Souichi sasaki Yoshio KODAMA Hidechito HAYASHI makoto HATAKEYAMA Mechanical systems engineering Nagasaki University 1-14 Bunkyo-machi Nagasaki City 852-8521 Japan Doctor of EngineeringMechanical systems engineering Nagasaki University 1-14 Bunkyo-machi Nagasaki City 852-8521 JapanMechanical systems engineering Nagasaki University 1-14 Bunkyo-machi Nagasaki City 852-8521 JapanProducts R&D Laboratory TOTO Ltd. 2-8-1 Honson Chigasaki City 253-8577 Japan

In the prediction theory for the broadband noise generated from a multiblade fan, the vortices in the Karman vortex street was divided into n pieces. The frequency distribution of the noise was estimated so that the Strouhal number could become constant even if the wake is spread by the diffusion. From the results of the measurement of the internal flow of the fan, it was found that the noise was related to the wake characteristics of the specific location in the scroll casing where the relative flow velocity was high. The noise operating in the vicinity of the maximum efficiency point of the fan was distributed over the domain from 500 Hz to 1250 Hz. It was experimentally proved that the influence of the Karman vortex street on the noise in the domains of high and low frequencies did not exist when the distribution of the estimated sound pressure level corresponded to the measured broadband noise.

关键词： aerodynamic acoustic Karman vortex street turbo machinery blade internal flow

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Risk and Protective Factors Associated with Depression and Anxiety among Pregnant Women during the COVID-19 Pandemic

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Health 2024年第1期16卷 37-51页

作者： Maiko Manaka Miyako Tsuda Moe Fujitani Ai Sawada Nanae Akatsuka Ayako sasaki Faculty of Nursing Osaka Medical and Pharmaceutical University Takatsuki Japan Osaka City Juso Hospital Osaka Japan Osaka City General Hospital Osaka Japan

Background: The coronavirus disease (COVID-19) pandemic has impacted perinatal women’s mental health. However, protective factors associated with depression among pregnant Japanese women during the pandemic have not been reported. Purpose: The present study investigated the risk and protective factors associated with depression and anxiety among pregnant women during the COVID-19 pandemic. Methods: An online questionnaire was administered to 157 pregnant women between October 2022 and May 2023 at two general hospitals in Japan. The Japanese versions of the Patient Health Questionnaire-9 (PHQ-9) and General Anxiety Disorder-7 (GAD-7) were used to assess symptoms of depression and anxiety. The χ2 test or Fisher’s exact test and multivariate logistic regression model were used to examine factors associated with depression and anxiety among pregnant women. Results: Overall, 47.1% and 35.7% of the pregnant women reported depressive and anxiety symptoms, respectively. A “history of mental illness” was a risk factor for depression and anxiety among pregnant women during the COVID-19 pandemic. Additionally, unmarried status was a risk factor for anxiety among pregnant women, whereas outdoor and indoor exercises were protective factors against depression and anxiety, respectively. Conclusions: Exercise may have protected pregnant women from depression and anxiety during the COVID-19 pandemic. Encouraging exercise may help maintain the mental health of pregnant women who do not have exercise restrictions.

关键词： Depression Anxiety Factors Pregnancy COVID-19 Pandemic

Pathophysiology of functional heartburn based on Rome Ⅲ criteria in Japanese patients

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World Journal of Gastroenterology 2015年第16期21卷 5009-5016页

作者： Yasuhiro Tamura Yasushi Funaki Shinya Izawa Akihito Iida Yoshiharu Yamaguchi Kazunori Adachi Naotaka Ogasawara makoto sasaki Hiroshi Kaneko Kunio Kasugai Department of Gastroenterology Division of Internal MedicineAichi Medical University School of Medicine Department of Clinical Laboratory Aichi Medical University School of Medicine Department of Internal Medicine Hoshigaoka Maternity Hospital

AIM:To investigate the pathophysiology of functional heartburn(FH) in Japanese ***:A total of 111 patients with proton pump inhibitor(PPI)-refractory non-erosive gastroesophageal reflux disease underwent intraesophageal pressure testing and 24-h multichannel intraluminal impedancep H(24MII-p H) *** patients also completed several questionnaires while they were receiving the PPI treatment, including the questionnaire for the diagnosis of reflux disease(QUEST), the frequency scale for the symptoms of gastroesophageal reflux disease(FSSG), the gastrointestinal symptoms rating scale(GSRS), SF-36, and the Cornell Medical Index(CMI).The subjects were classified into FH and endoscopy-negative reflux disease(ENRD) groups based on the Rome Ⅲ ***:Thirty-three patients with esophageal motility disorder were excluded from this study, while 22 patients with abnormal esophageal acid exposure time(p H-POS) and 34 with hypersensitive esophagus(HE) were included in the ENRD *** FH group included 22 patients with no reflux ***, age, and body mass index did not differ significantly between the *** mean SF-36 values were < 50(normal) for all scales in these groups, with no significant *** GSRS scores in these groups were not different and showed overlap with other gastrointestinal *** QUEST and the FSSG scores did not differ significantly between the *** was diagnosed using the CMI questionnaire in 17 of the 78 included subjects within the p H-POS(n=4),HE(n=8),and FH(n=5)groups,with no significant ***:Clinical characteristics of the FH and PPI-refractory ENRD groups were ***,esophageal function should be examined via manometry and 24MII-p H testing to differentiate between them.

关键词： Functional heartburn endoscopy-negativereflux disease proton pump inhibitor-resistant RomeⅢ criteria 24-h multichannel intraluminal impedancepHtesting

Gastric calcifying fibrous tumor removed by endoscopic submucosal dissection

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World Journal of Gastrointestinal Endoscopy 2013年第9期5卷 457-460页

作者： Naotaka Ogasawara Shinya Izawa Mari Mizuno Atsushi Tanabe Tomonori Ozeki Hisatsugu Noda Emiko Takahashi makoto sasaki Toyoharu Yokoi Kunio Kasugai Department of Gastroenterology Aichi Medical University School of Medicine Department of Pathology Aichi Medical University School of Medicine

The World Health Organization describes calcifying fibrous tumors(CFTs) as rare, benign lesions characterized by hypocellular, densely hyalinized collagenization with lymphoplasmacytic infiltration. These tumors rarely involve the gastrointestinal(GI) tract. A routine endoscopic upper gastrointestinal screen detected a 10-mm submucosal tumor(SMT) in the lesser curvature of the lower corpus of the stomach of an apparently healthy, 37-year-old woman with no history of Helicobacter pylori infection. Endoscopic ultrasonography(EUS) localized the internally isoechoic, homogeneous SMT mainly within the submucosa. Malignancy was ruled out using endoscopic submucosal dissection(ESD). A pathological examination confirmed complete resection of the SMT, and defined a hypocellular, spindle-cell tumor with a densely hyalinized, collagenous matrix, scattered lymphoplasmacytic aggregates as well as a few psammomatous, dystrophic calcified foci. The mass was immunohistochemically positive for vimentin and negative for CD117(c-kit protein), CD34, desmin, smooth muscle actin(SMA) and S100. Therefore, the histological findings were characteristic of a CFT. To date, CFT resection by ESD has not been described. This is the first case report of a gastric calcifying fibrous tumor being completely resected by ESD after endoscopic ultrasonography.

关键词： Calcifying fibrous tumor Endoscopic submucosal dissection Submucosal tumor Endoscopic ultrasonography

Development and Evaluation of 3D Delivery Animation Software Designed to Improve the Mother’s and Spouse’s Satisfaction with Delivery

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Health 2024年第5期16卷 439-458页

作者： Ayako sasaki Sachi Chikazawa Nojima Kumiko Tomita Takako Hatakeyama Keiko Imoto Yasufumi Imoto Nobutane Faculty of Nursing Osaka Medical and Pharmaceutical University Takatsuki Japan Imoto Ladies Clinic Echizen Japan

Purpose: To clarify the effectiveness of 3-D delivery animation software for the mother’s and husband’s satisfaction with delivery. Subjects and Method: We independently developed a software application used to display the pelvic region and explain the labor process. The study involved a collaboration with hospital staff who recruited 18 primiparous and 18 multiparous mothers who were hospitalized for delivery at Facility A. The midwife explained the process of delivery using the “Delivery Animation Software”. A self-administered, anonymous questionnaire was distributed and analyzed separately for primiparous and multiparous mothers and their husbands. Results: 1) For both primiparous and multiparous couples, both mothers and their husbands gained a significantly higher level of understanding after delivery than during pregnancy. 2) The Self-Evaluation Scale for Experience of Delivery results were as follows: “I did my best for the baby even if it was painful” was selected more often for “birth coping skills”;“reliable medical staff” was selected more often for “physiological birth process”;“the birth progressed as I expected” was selected frequently by primiparous mothers;and “the birth progressed smoothly” was selected often by multiparous mothers. 3) In terms of husbands’ satisfaction with the delivery, “I was satisfied with the delivery”, “I was given an easy-to-understand explanation”, and “They explained the process to me” was selected of primiparous and multiparous fathers. 4) All primiparous and multiparous mothers positively evaluated whether the delivery animation was helpful in understanding the process of delivery. Conclusion: The delivery animation was effective in improving the understanding and satisfaction of both the mothers and their husbands.

关键词： Mother Spouse Satisfaction 3D Delivery Animation Software

Giant Brunner's gland hyperplasia of the duodenum successfully resected en bloc by endoscopic mucosal resection: A case report

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World Journal of Gastrointestinal Endoscopy 2024年第6期16卷 368-375页

作者： Makomo Makazu Akiko sasaki Chikamasa Ichita Chihiro Sumida Takashi Nishino Miki Nagayama Shinichi Teshima Gastroenterology Medicine Center Shonan Kamakura General HospitalKamakura 247-8533Japan Department of Gastroenterology Shonan Kamakura General HospitalKanagawa 247-8533Japan Department of Pathology Shonan Kamakura General HospitalKamakura 247-8533Japan

BACKGROUND Duodenal Brunner's gland hyperplasia(BGH)is a therapeutic target when complications such as bleeding or gastrointestinal obstruction occur or when malignancy cannot be ruled ***,we present a case of large BGH treated with endoscopic mucosal resection(EMR).CASE SUMMARY An 83-year-old woman presented at our hospital with *** tests revealed severe anemia,esophagogastroduodenoscopy showed a 6.5 cm lesion protruding from the anterior wall of the duodenal bulb,and biopsy revealed the presence of glandular *** ultrasonography(EUS)demonstr-ated relatively high echogenicity with a cystic *** muscularis propria was slightly elevated at the base of the *** was performed without *** formalin-fixed lesion size was 6 cm×3.5 cm×3 cm,showing nodular proliferation of non-dysplastic Brunner's glands compartmentalized by fibrous septa,confirming the diagnosis of *** of EMR or hot snare polypectomy are rare for duodenal BGH>6 *** this case,the choice of EMR was made by obtaining information on the base of the lesion as well as on the internal characteristics through *** Large duodenal lesions with good endoscopic maneuverability and no evident muscular layer involvement on EUS may be resectable via EMR.

关键词： Duodenum Brunner’s gland hyperplasia Brunner’s gland hamartoma Brunner’s gland adenoma Endoscopic mucosal resection Case report

用SE质子密度加权像和快速短反转时间STIR观察帕金森病的黑质结构

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放射学实践 2003年第3期18卷 207-207页

作者： Hirobumi Oikawa makoto sasaki Yoshiharu Tamakawa 张淑倩河北省人民医院医学影像中心

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隐蔽火区地表碳通量智能预测组合模型研究

安全与环境学报 2024年

作者：张河猛张言王永军车恒旭李金雨王鹏程 sasaki Kyuro 辽宁工程技术大学安全科学与工程学院辽宁工程技术大学教育部热动力灾害防控实验室辽宁工程技术大学工程与环境研究所九州大学工学府

隐蔽火区地表碳通量监测对评估其温室效应及火区范围圈定十分重要。针对碳通量影响因素多、难预测等问题，提出了一种基于灰狼优化算法（Grey Wolf Optimization，GWO）–改进高斯过程回归（Gaussian Process Regression，GPR）–核密... 详细信息

隐蔽火区地表碳通量监测对评估其温室效应及火区范围圈定十分重要。针对碳通量影响因素多、难预测等问题，提出了一种基于灰狼优化算法（Grey Wolf Optimization，GWO）–改进高斯过程回归（Gaussian Process Regression，GPR）–核密度估计（Kernel Density Estimation，KDE）预测模型。采用格拉布斯检验法剔除异常值，运用GWO优化GPR算法中的超参数，以提高预测精度。使用验证集预测误差并进行KDE建模，得到碳通量的区间预测值，进而针对组合模型的泛化能力及参数敏感性分析进行评估。结果显示：GWO–GPR–KDE模型的平均绝对误差、均方根误差、决定系数、80%置信区间宽度和95%置信区间宽度分别为0.953 86、1.266 3、0.926 56、0.387和0.823，这些评估指标均优于随机森林（Random Forest，RF）、反向传播神经网络（Back Propagation Neural Network，BPNN）、结合多层感知器的支持向量机（Multilayer Perceptron–Support Vector Machine，MLP–SVM）、高斯过程回归（Gaussian Process Regression，GPR）等经典模型。GWO–GPR–KDE模型对隐蔽火区地表碳通量预测具有较好的准确性和泛化性，为煤田火区防控和温室效应评估提供了新思路。

关键词：环境学隐蔽火区碳通量灰狼优化算法高斯过程回归区间预测

Effects of hydraulic oil and lubricant additives on dynamic friction properties under various reciprocating sliding conditions

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Friction 2020年第2期8卷 471-480页

作者： Shinji KATO Shinya sasaki Engineering Headquarters Automotive ComponentsKYB Corporation2548DolaKani-shiGifu 509-0298Japan Department of Mechanical Engineering Faculty of Engineering Division ITokyo University of Science6-3-1NiijukuKatsushika-kuTokyo 125-8585Japan

The friction characteristics of a shock absorber are very complex because the reciprocating motion is not always *** this study,a device was developed and used to analyze the dynamic friction characteristics under various reciprocating sliding conditions to determine the sliding materials and hydraulic oils that improve the shock absorber *** study describes the influence of hydraulic oil additive on the fine reciprocating friction characteristics of steel and copper *** oils were prepared by blending a paraffinic mineral oil with zinc dithiophosphate(ZnDTP)and polyhydric alcohol ester as *** results show that the dynamic frictional characteristics vary mainly depending on the additive concentration.A specific additive formulation induces a unique amplitude-dependent friction *** addition,the influence of different additives on the lubrication mechanism is investigated based on the instrumental analysis of the friction surface.

关键词： shock absorber dynamic friction reciprocating friction additive zinc dithiophosphate(ZnDTP)

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