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Hole doping of MgB2C2, a MgB2 related [B/C] layered compound
Takao Mori,Eiji Takayama-Muromachi 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
The MgB2 related borocarbide MgB2C2 was synthesized and various attempts were made to hole dope the material. MgB2C2 is orthorhombic (space group Cmca a= 10:92 A,b= 9:45 A,c= 7:45 A) with [B/C] nets. Successful synthesis was carried out frompure elements by a solid state reaction method in a closed environment. Theoretical calculations indicate the possibility of holedoping of MgB 2C2 to be favorable for superconductivity due to the at band (in theTYdirection) similar to one in MgB2. Holedoping of MgB 2C2 was attempted by two routes: (1) substitutional dope of Mg with alkali metals, (2) doping in the [B/C] nets, andas a result Li doping was indicated to be feasible with a possible semiconductor to metal transition induced. High pressure synthesisof (Mg,Li)B2C2 was also attempted but only resulted in formation of the LiBC phase.
Tsuneaki Takao,Seiji Okada,Yuichiro Morishita,Takeshi Maeda,Kensuke Kubota,Ryosuke Ideta,Eiji Mori,Itaru Yugue,Osamu Kawano,Hiroaki Sakai,Takayoshi Ueta,Keiichiro Shiba 대한척추외과학회 2016 Asian Spine Journal Vol.10 No.3
Study Design: Retrospective case series. Purpose: To clarify the influence of cervical spinal canal stenosis (CSCS) on neurological functional recovery after traumatic cervical spinal cord injury (CSCI) without major fracture or dislocation Overview of Literature: The biomechanical etiology of traumatic CSCI remains under discussion and its relationship with CSCS is one of the most controversial issues in the clinical management of traumatic CSCI. Methods: To obtain a relatively uniform background, patients non-surgically treated for an acute C3–4 level CSCI without major fracture or dislocation were selected. We analyzed 58 subjects with traumatic CSCI using T2-weighted mid-sagittal magnetic resonance imaging. The sagittal diameter of the cerebrospinal fluid (CSF) column, degree of canal stenosis, and neurologic outcomes in motor function, including improvement rate, were assessed. Results: There were no significant relationships between sagittal diameter of the CSF column at the C3–4 segment and their American Spinal Injury Association motor scores at both admission and discharge. Moreover, no significant relationships were observed between the sagittal diameter of the CSF column at the C3-4 segment and their neurological recovery during the following period. Conclusions: No relationships between pre-existing CSCS and neurological outcomes were evident after traumatic CSCI. These results suggest that decompression surgery might not be recommended for traumatic CSCI without major fracture or dislocation despite pre-existing CSCS.
On the Uniqueness of the Momentary Equilibrium in the Brock and Trunovsky Model
Nobuhiro Mori,Takao Iida,Makoto Okamura 한양대학교 경제연구소 2005 JOURNAL OF ECONOMIC RESEARCH Vol.10 No.1
This note establishes the uniqueness of the momentary equilibriain the Brock and Turnovsky dynamic monetary model (1981) under assumptions that a consumption good and money are substitutable for leisure, eomplementary with each other, and a personal income tax rate is not lower than a gross profit tax rate.
Surgical management of the cases with both biliary and duodenal obstruction
Yoshihiro Miyasaka,Takao Ohtsuka,Vittoria Vanessa Velasquez,Yasuhisa Mori,Kohei Nakata,Masafumi Nakamura 소화기인터벤션의학회 2018 International journal of gastrointestinal interven Vol.7 No.2
Endoscopic management is presently the recommended first-line of treatment for biliary strictures. However, surgery still has an important role especially for biliary obstruction (BO) with duodenal obstruction. Even though endoscopic treatment for concurrent BO and gastric-outlet obstruction has been proposed, it is still not widespread. Duodenal obstruction is often associated with malignant BO which makes endoscopic treatment more challenging. Biliary and gastrointestinal double bypass with Roux-en-Y hepaticojejunostomy and gastrojejunostomy is the most common surgical intervention for malignant biliary and gastric-outlet obstruction. A variety of procedures of biliary bypass and gastrointestinal bypass have been reported. According to several studies, mortality rates range from 0% to 7%, while morbidity rates range from 3% to 50%. Higher morbidity was observed in symptomatic patients caused by the disease. Most common morbidity after double bypass was delayed gastric emptying. Recurrence of BO and gastric-outlet obstruction was less frequently seen after surgical bypass compared to after endoscopic treatment. Minimally invasive approach has been applied to double bypass. Studies showed that laparoscopic double bypass has a shorter hospital stay and reduced postoperative pain; however, due to its technical demand, it is still presently an uncommon procedure. Robotic bypass surgery may resolve this issue in the future. Further analyses of outcomes of both surgical and endoscopic treatments are necessary to establish better and suitable palliation options for concurrent biliary and duodenal obstruction caused by unresectable malignant tumors.
Surgical management of the cases with both biliary and duodenal obstruction
Yoshihiro Miyasaka,Takao Ohtsuka,Vittoria Vanessa Velasquez,Yasuhisa Mori,Kohei Nakata,Masafumi Nakamura 소화기인터벤션의학회 2018 Gastrointestinal Intervention Vol.7 No.2
Endoscopic management is presently the recommended first-line of treatment for biliary strictures. However, surgery still has an important role especially for biliary obstruction (BO) with duodenal obstruction. Even though endoscopic treatment for concurrent BO and gastric-outlet obstruction has been proposed, it is still not widespread. Duodenal obstruction is often associated with malignant BO which makes endoscopic treatment more challenging. Biliary and gastrointestinal double bypass with Roux-en-Y hepaticojejunostomy and gastrojejunostomy is the most common surgical intervention for malignant biliary and gastric-outlet obstruction. A variety of procedures of biliary bypass and gastrointestinal bypass have been reported. According to several studies, mortality rates range from 0% to 7%, while morbidity rates range from 3% to 50%. Higher morbidity was observed in symptomatic patients caused by the disease. Most common morbidity after double bypass was delayed gastric emptying. Recurrence of BO and gastric-outlet obstruction was less frequently seen after surgical bypass compared to after endoscopic treatment. Minimally invasive approach has been applied to double bypass. Studies showed that laparoscopic double bypass has a shorter hospital stay and reduced postoperative pain; however, due to its technical demand, it is still presently an uncommon procedure. Robotic bypass surgery may resolve this issue in the future. Further analyses of outcomes of both surgical and endoscopic treatments are necessary to establish better and suitable palliation options for concurrent biliary and duodenal obstruction caused by unresectable malignant tumors.
An Empirical Analysis of Category Extension in the Online Luxury Fashion Market
Chikako Miura,Sakiho Kai,Takao Furukawa,Kaoru Mori,Yumi Kwon 한국복식학회 2021 International journal of costume and fashion Vol.21 No.2
The purpose of the present study is to reveal the actual circumstances of brand extension in the luxury fashion market by shedding light on category extensions and their relationship to the pricing strategies of each fashion brand. To perform a comprehensive empirical analysis of luxury fashion products, the study analyzed 308,154 unique products from 2,513 individual brands sold on online platforms. The study further estimated product sales according to brand category and sub-category. The research results reveal how estimated sales for clothing, bags, footwear, accessories, and jewelry confirm the fact that horizontal brand extension for luxury fashion brands result in increased sales. Furthermore, the estimated sales by sub-category reveal a complementary relationship between flagship products and affordable products. These complementary relationships enable a diagonal brand extension that prevents brand dilution and cannibalization. In short, the results reveal how effective brand extension reflects brand equity, which in turn is useful for the growth of emerging brands. Existing studies on the brand extension of luxury fashion products were limited to a consumer-centered approach, but the present study is significant in that it quantitatively analyzes brand extension for luxury brands in the online market.
Hideyuki Tamai,Naoki Shingaki,Yoshiyuki Mori,Kosaku Moribata,Akira Kawashima,Yoshimasa Maeda,Toru Niwa,Hisanobu Deguchi,Izumi Inoue,Takao Maekita,Mikitaka Iguchi,Jun Kato,Masao Ichinose 거트앤리버 소화기연관학회협의회 2016 Gut and Liver Vol.10 No.4
Background/Aims: This study aimed to predict sustained viral response (SVR) to low-dose pegylated interferon (PEGIFN) plus ribavirin of elderly and/or cirrhotic patients with genotype 2 hepatitis C virus (HCV) using viral response within 2 weeks. Methods: Low-dose PEG-IFN-α-2b plus ribavirin was administered to 50 elderly and/or cirrhotic patients with genotype 2 HCV for 24 weeks. The dynamics of HCV RNA and HCV core antigen levels within 2 weeks were measured. Results: The patients’ median age was 66 years. There were 21 male and 29 female patients. The median baseline HCV RNA level was 5.7 log IU/mL. Rapid viral response was achieved in 17 patients (34%), SVR in 28 (56%), and two (4%) discontinued treatment. Univariate analysis of factors contributing to SVR showed significant differences for sex, baseline virus level, and response within 4 weeks. When 40 fmol/L was set as the cutoff value for the core antigen level at 1 week, the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy for predicting SVR were 93%, 75%, 84%, 88%, and 85%, respectively. Conclusions: Low-dose PEG-IFN plus ribavirin was a safe and costeffective treatment for elderly and/or cirrhotic patients with genotype 2 HCV, and the viral response within 2 weeks was a useful predictor of SVR.