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Improvement in Efficiency and Operating Range of Centrifugal Blower Stage for Sewage Aeration Blower
Hiradate, Kiyotaka,Kanno, Toshio,Nishida, Hideo,Shinkawa, Yasushi,Joukou, Satoshi Korean Society for Fluid machinery 2010 International journal of fluid machinery and syste Vol.3 No.4
We developed a high-efficiency, wide-operating-range centrifugal blower stage to meet the demand for reduced total energy-consumption in sewage treatment plants. We improved the efficiency of the two-dimensional impeller using a shape optimization tool and one-dimensional performance prediction tool. A limit of the throat deceleration ratio was set to maintain the stall-margin of the impeller. The low solidity vaned diffuser and return channel were designed using a sensitivity analysis with orthogonal arrays and three-dimensional steady flow simulations. The low solidity diffuser was designed in order to improve the performance in the low-flow-rate region. The return channel was designed so that the total pressure loss in the return channel was minimized. Model tests of both the conventional and optimized blower stages were carried out, and the efficiency and operating range of both stages were compared. The optimized blower stage improved in stage efficiency by 3% and in operating range by 5% compared with the conventional blower stage.
Shunsuke Ohnishi,Hidemichi Watari,Maki Kanno,Yoko Ohba,Satoshi Takeuchi,Tempei Miyaji,Shunsuke Oyamada,Eiji Nomura,Hidenori Kato,Toru Sugiyama,Masahiro Asaka,Noriaki Sakuragi,Takuhiro Yamaguchi,Yasuhi 대한부인종양학회 2017 Journal of Gynecologic Oncology Vol.28 No.5
Objective: Rikkunshito, an herbal medicine, is widely prescribed in Japan for the treatmentof anorexia and functional dyspepsia, and has been reported to recover reductions in foodintake caused by cisplatin. We investigated whether rikkunshito could improve chemotherapyinducednausea and vomiting (CINV) and anorexia in patients treated with cisplatin. Methods: Patients with uterine cervical or corpus cancer who were to receive cisplatin (50 mg/m2day 1) and paclitaxel (135 mg/m2day 0) as first-line chemotherapy were randomly assignedto the rikkunshito group receiving oral administration on days 0–13 with standard antiemetics,or the control group receiving antiemetics only. The primary endpoint was the rate of completecontrol (CC: no emesis, no rescue medication, and no significant nausea) in the overall phase(0–120 hours). Two-tailed p<0.20 was considered significant in the planned analysis. Results: The CC rate in the overall phase was significantly higher in the rikkunshito groupthan in the control group (57.9% vs. 35.3%, p=0.175), as were the secondary endpoints:the CC rate in the delayed phase (24–120 hours), and the complete response (CR) rates(no emesis and no rescue medication) in the overall and delayed phases (63.2% vs. 35.3%, p=0.095; 84.2% vs. 52.9%, p=0.042; 84.2% vs. 52.9%, p=0.042, respectively), and time totreatment failure (p=0.059). Appetite assessed by visual analogue scale (VAS) appeared to besuperior in the rikkunshito group from day 2 through day 6. Conclusion: Rikkunshito provided additive effect for the prevention of CINV and anorexia
( Kumi Nakaya ),( Naoki Nakaya ),( Mana Kogure ),( Rieko Hatanaka ),( Ippei Chiba ),( Ikumi Kanno ),( Satoshi Nagaie ),( Tomohiro Nakamura ),( Motoyori Kanazawa ),( Soichi Ogishima ),( Nobuo Fuse ),( 대한소화기기능성질환·운동학회 2024 Journal of Neurogastroenterology and Motility (JNM Vol.30 No.2
Background/Aims The objective of this research is to examine factors related to irritable bowel syndrome (IBS) prevalence in a large population-based study. Methods A cross-sectional study was conducted with participants in the Miyagi part of the Tohoku Medical Megabank Project Community-Based cohort study who completed the Rome II Modular Questionnaire. Multivariate odds ratios (ORs) for the presence of IBS and 95% confidence intervals (95% CIs) for the reference group were calculated for each factor. Additionally, a stratified analysis was performed by sex and age group (20-49 years, 50-64 years, and ≥ 65 years). Results Among 16 252 participants, 3025 (18.6%) had IBS, comprising 750 men (15.5%) and 2275 women (19.9%). Multivariate ORs for the presence of IBS decreased significantly with each year of age (OR, 0.98; 95% CI, 0.98-0.99). Moreover, compared with the reference group, ORs for the presence of IBS were significantly higher in individuals whose home was partially damaged by the Great East Japan Earthquake, those with < 16 years of education, those who spent less time walking, those with high perceived stress (1.77, 1.57-2.01), those with high psychological distress (1.58, 1.36-1.82), and those with high symptoms of depression (1.76, 1.60-1.94). In stratified analyses, a significant relationship was found between psychological factors and IBS prevalence in all sex and age groups. Conclusions This large cross-sectional population-based cohort study identified several factors associated with IBS prevalence. Psychological factors were significantly associated with IBS prevalence across all age groups and sexes. (J Neurogastroenterol Motil 2024;30:208-219)