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Yanai,Eiji,Suzuki,Takeshi,Yamada,Tokiyoshi 한국화재소방학회 1997 한국화재소방학회 학술대회 논문집 Vol.1997 No.-
Flammability of non-flame-retardant and flame-retardant materials was studied by using cone calorimeter Also, relations between the results obtained by using cone calorimeter and those obtained by the flammability test of japanese fire Service Law were examined. The results are as follows: 1) The ignition time of the molten specimens is relatively long, whereas the ignition time of the non-molten specimens is short. None of remarkable difference of the ignition time has been found between non-flame-retardant and flame-retardant materials specimens. 2) The peak heat release rates of flame-retardant materials are smaller than those of non-flame- retardant materials. 3) The carbon monoxide and smoke evolved from flame-retardant materials generate much more than those evolved from non-flame-retardant materials. 4) Even if flame-retardant materials are passed by the flammability test of Japanese Fire Service Law, they burn easily under external radiative heating condition.
Yanai, Ruth D.,Arthur, Mary A.,Acker, Marty,Levine, Carrie R.,Park, Byung Bae Canadian Science Publishing 2012 Canadian journal of forest research. Journal canad Vol.42 No.8
<P> Leaf litterfall represents an important nutrient flux in forests, but separating leaves by species and collecting fresh litter annually for nutrient analysis is time-consuming and expensive. To quantify the sources of variation in litterfall nutrient estimates and guide optimal allocation of research effort, we analyzed nutrient concentration (5 years) and mass (6 years) of leaf litter for nine tree species in 13 northern hardwood sites. Coefficients of variation (CVs) in nutrient concentration were higher across sites than over time within sites for most elements; phosphorus was especially variable across sites (56% CV). Thus, to estimate litterfall nutrient fluxes accurately in forests of this type, nutrient analyses should be site-specific as well as species-specific but may not need to be repeated annually (CVs over time averaged 17% for calcium, 21% for magnesium, 28% for potassium, and 32% for phosphorus concentration). Total leaf litterfall mass varied considerably from year to year, ranging from 234 to 370 g·m<SUP>-2</SUP> averaged over 13 sites. We recommend that litter collectors be elevated above the ground to avoid oversampling during extreme wind events. Use of species-specific allometric equations, or even basal area, to estimate the species composition of total litter mass may obviate the need to sort litter by species. </P>
Weightlessness in Water : Its Unexpected Mechanical Effects on Freestyle Swimming
Yanai, Toshimasa Korean Society of Sport Biomechanics 2002 한국운동역학회지 Vol.12 No.2
When our body is immersed in water, we experience weightlessness. The degree of weightlessness that we experience varies depending on the proportion of the body immersed in water, being governed by the relationship between the weight of body and the buoyant force acting on the body. Human body during the performance of swimming in no exception to these influences. Swimmers body is subject to a time and position dependent force system. Even the magnitude of the buoyant force acting on the swimmers body at every given instant and the corresponding position of the CB change continuously. The findings of this study support the following conclusions. The buoyancy torque was the primary source of bodyroll exhibited by front crawl swimmers performing at distance pace, accounting for 88 % of the bodyroll. Faster swimmers used buoyancy more effectively to generate bodyroll, partially supporting the postulation that an effective use of buoyancy for bodyroll may reduce the generated hydrodynamic forces to be wasted in non-propulsive directions and maximize forward propulsion.
Shiori Yanai,Kiyoshi Kanno,Kiyoshi Aiko,Masaaki Andou 대한부인종양학회 2021 Journal of Gynecologic Oncology Vol.32 No.1
Objective: In comparison with laparoscopic transperitoneal para-aortic lymphadenectomy,the advantages of laparoscopic extraperitoneal para-aortic lymphadenectomy (ePAL) arethat the operative field is not obstructed by bowel and the Trendelenburg position is notrequired [1]. The ePAL technique has been adopted to the robotic surgery with the da VinciXi. There are only a few reports demonstrating the technical feasibility of robot-assisted ePAL(RAePAL) [2,3]. This report describes the new surgical technique of RAePAL with the bipolarcutting method. Methods: The patient was a 53-year-old woman diagnosed as ovarian clear cell carcinoma(CCC) after left salpingo-oophorectomy. As the re-staging surgery, robot-assisted rightsalpingo-oophorectomy, hysterectomy, omentectomy, and pelvic lymphadenectomy wereplanned following ePAL. The patient was placed in the supine position and tilted 5 degrees tothe right. Three da Vinci arms were docked at the patient's left side (Fig. 1). The bipolar cuttingmethod was performed by with the surgeon's right hand. An AirSeal® port (ConMed, Utica,NY, USA) was placed on the side near the assistant. After the para-aortic space was expanded,lymphadenectomy was performed up to the renal veins with the bipolar cutting method. Results: The PAL operative time was 155 minutes, estimated blood loss was 25 mL. Thepatient developed no perioperative complications, and the postoperative diagnosis was stageIC1 ovarian CCC with no pelvic (n=0/42) and para-aortic lymph nodes (n=0/59) metastasis. Conclusion: RAePAL with the bipolar cutting method was technically feasible. Performinglymphadenectomy between the aorta and the vena cava was facilitated by the articulatedrobotic arm.
Distinction between Chronic Enteropathy Associated with the SLCO2A1 Gene and Crohn’s Disease
Shunichi Yanai,Satoko Yamaguchi,Shotaro Nakamura,Keisuke Kawasaki,Yosuke Toya,Noriyuki Yamada,Makoto Eizuka,Noriyuki Uesugi,Junji Umeno,Motohiro Esaki,Eiko Okimoto,Shunji Ishihara,Tamotsu Sugai,Takayu 거트앤리버 소화기연관학회협의회 2019 Gut and Liver Vol.13 No.1
Background/Aims: We recently identified recessive mutations in the solute carrier organic anion transporter family member 2A1 gene (SLCO2A1 ) as causative variants of chronic nonspecific multiple ulcers of the small intestine (chronic enteropathy associated with SLCO2A1, CEAS). The aim of this study was to investigate the gastroduodenal expression of the SLCO2A1 protein in patients with CEAS and Crohn’s disease (CD). Methods: Immunohistochemical staining for SLCO2A1 was performed with a polyclonal antibody, HPA013742, on gastroduodenal tissues obtained by endoscopic biopsy from four patients with CEAS and 29 patients with CD. Results: The expression of SLCO2A1 was observed in one of four patients (25%) with CEAS and in all 29 patients (100%) with CD (p<0.001). The three patients with CEAS without SLCO2A1 expression had a homozygous splice-site mutation in SLCO2A1, c.1461+1G>C (exon 7) or c.940+1G>A (exon 10). The remaining one CEAS patient with positive expression of SLCO2A1 had compound heterozygous c.664G>A and c.1807C>T mutations. Conclusions: Immunohistochemical staining for SLCO2A1 in gastroduodenal tissues obtained by endoscopic biopsy is considered useful for the distinction of CEAS from CD.
Weightlessness in Water : Its Unexpected Mechanical Effects on Freestyle Swimming
Toshimasa, Yanai 한국운동역학회 2002 한국운동역학회지 Vol.12 No.2
When our body is immersed in water, we experience weightlessness. The degree of weightlessness that we experience varies depending on the proportion of the body immersed in water, being governed by the relationship between the weight of body and the buoyant force acting on the body. Human body during the performance of swimming in no exception to these influences. Swimmers body is subject to a time and position dependent force system. Even the magnitude of the buoyant force acting on the swimmers body at every given instant and the corresponding position of the CB change continuously. The findings of this study support the following conclusions. The buoyancy torque was the primary source of bodyroll exhibited by front crawl swimmers performing at distance pace, accounting for 88 % of the bodyroll. Faster swimmers used buoyancy more effectively to generate bodyroll, partially supporting the postulation that an effective use of buoyancy for bodyroll may reduce the generated hydrodynamic forces to be wasted in non-propulsive directions and maximize forward propulsion.
Electrodeposited Fe-Co Films Prepared from a Citric-acid-based Plating Bath
T. Yanai,H. Uto,T. Shimokawa,M. Nakano,H. Fukunaga,K. Suzuki 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.12
Electrodeposited Fe-Co films are commonly prepared in a boric-acid-based bath. In this research,we applied citric acid instead of boric acid for the plating of Fe-Co films because boron in the wastebath is restricted by environmental-protection regulations in Japan. We evaluated the effect ofcitric acid on the magnetic and structural properties of the films. The saturation magnetization ofthe Fe-Co films slightly increased while the Fe content in the Fe-Co films decreased with increasingcitric acid concentration. The lowest coercivity value of 240 A/m was obtained at a citric acidconcentration of 100 g/L. The plating bath with this citric acid concentration enabled us to obtainFe-Co films with high saturation magnetizations and smooth surface morphologies.