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Shortening of processing time of optimal design of multiple constant multiplication using FPGAs
Masao Nakayama,Takao Sasaki,Hisamichi Toyoshima 대한전자공학회 2008 ITC-CSCC :International Technical Conference on Ci Vol.2008 No.7
Problem of designing multiple constant multiplication (MCM) circuits with minimum cost is known to be an NP-complete problem. Several techniques using combinatorial optimization algorithms such as genetic algorithms (GAs), etc., have been proposed. However, if implemented as software, as the circuit scale increases, a great deal of time is needed for optimization. The purpose of this study is to shorten the time spent on optimizing MCM circuit design. We propose a hardware-oriented algorithm suitable for FPGAs for both circuit synthesis and optimization.
Vertebral Endplate Cyst Formation in Relation to Properties of Interbody Cages
Manabu Sasaki,Masao Umegaki,Takanori Fukunaga,Yasukazu Hijikata,Yohei Banba,Katsumi Matsumoto,Yasuyoshi Miyao 대한척추신경외과학회 2021 Neurospine Vol.18 No.1
Objective: This retrospective study aimed to compare vertebral endplate cyst formation (VECF), an early predictor for pseudoarthrosis, in different types of interbody cages. Methods: We reviewed 84 cases treated with single-level posterior/transforaminal lumbar interbody fusion. We utilized a polyetheretherketone cage in 20 cases (group P), a titanium cage in 16 cases (group Ti), a titanium-coating polyetheretherketone cage in 13 cases (group TiP) and a porous tantalum cage in 35 cases (group Tn). VECF was evaluated comparing the computed tomography scans taken at day 0 and 6-month postoperation. We defined VECF (+) as enlargement of a pre-existing cyst or de novo formation of a cyst with the diameter over 2 mm. We calculated the adjusted odds ratio (OR) and 95% confidence intervals (CIs) as an indicator of association between different types of cages and VECF using a logistic regression model. Results: VECF was observed in 13 (65%), 7 (44%), 9 (69%), and 8 (23%) cases in groups P, Ti, TiP and Tn, respectively. VECF correlated with the type of cage (p=0.04). In comparison with group P, the proportion of VECF (+) cases was lower in group Tn (OR, 0.16; 95% CI, 0.04–0.60) but not different in group Ti (OR, 0.47; 95% CI, 0.10–2.20) and group TiP (OR, 1.06; 95% CI, 0.21–5.28). No patient underwent additional surgery for the fused spinal level during the follow-up periods (average, 37.9 months; range, 6–76 months). Conclusion: VECF was the least in the porous Tn cage, suggesting its potential superiority for initial stability.
Oil Pump Rotor without Machining Treatment
Kanou Yuki,Sasaki Masao,Hosono Katsuaki 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Oil Pump rotor is essential parts for automobile and, it is consisted of drive rotor and driven rotor in general. These parts are requested different properties according to environment. There are 2 types of Oil Pump rotor according to its usage. One is used for electric system, and the other is used for shaft-driven system. Especially, high precision and functionality is required in electric pump, and cost reduction is required in shaft-drive pump without slowing down its performance. This paper is mainly describing about the non-machine treated shaft-drive pump, based on the trial sample producing process.
ALUMINUM BIAS SPUTTERING FOR FILM COVERAGE IMPROVEMENT
Kobayashi.Shigeru,Shimamura, Hideaki,Sakata, Masao,Fujita, Shouyou,Yajima, Akira,Saito, Hiroshi,Tateishi, Hideki,Sasaki, Shinji 대한전자공학회 1989 ICVC : International Conference on VLSI and CAD Vol.1 No.1
A filter was installed between the sputtering target and the substrate so as to reduce the aluminum deposition arriving with a shallow angle at the substrate in order to study the step coverage improvement by the bias application. It is deduced that the aluminum flowage occurs so that the surface energy is minimized around the via hole. Aluminum films deposited with the pulsed biasing were characterized in which the possible microstructual damage by argon bombardment is to be minimized. This biasing technique should provide with a better process for the step coverage improvement. A sputtering cathode was developed for aluminum bias sputtering which has a substrate current capability as high as 2A for a 5 inch wafer at the substrate voltage around-50V.
( Shinya Fujie ),( Hirotoshi Ishiwatari ),( Keiko Sasaki Junya Sato ),( Hiroyuki Matsubayashi ),( Masao Yoshida ),( Sayo Ito ),( Noboru Kawata ),( Kenichiro Imai ),( Naomi Kakushima ),( Kohei Takizawa 대한간학회 2019 Gut and Liver Vol.13 No.3
Background/Aims: To compare the diagnostic yield of 20-gauge forward-bevel core biopsy needle (CBN) and 22-gauge needle for endoscopic ultrasound (EUS)-guided fine needle aspiration (FNA) of solid pancreatic masses. Methods: The use of 20-gauge CBN was prospectively evaluated for 50 patients who underwent EUS-FNA from June 2016 to December 2016. Data were compared with those obtained by a retrospective study of 50 consecutive patients who underwent EUS-FNA using standard 22-gauge needles between December 2016 and April 2017. At least two punctures were performed for each patient; the sample from the first pass was used for cytology with or without histology and that from the second pass was used for histology. Sample quantity was evaluated using the sample obtained from the second pass. Results: There was no significant difference in the diagnostic accuracy rate between the first and second passes (20-gauge CBN: 96% [48/50]; standard 22-gauge needle: 88% [44/50]). Samples >10× power fields in length were obtained from 90% (43/48) and 60% (30/50) of patients using the 20-gauge CBN and standard 22-gauge needle, respectively (p=0.01). Technical failure occurred for two patients with the 20-gauge CBN. Conclusions: Diagnostic accuracy of the 20-gauge CBN was comparable to that of the 22-gauge needle. However, two passes with the 20-gauge CBN yielded a correct diagnosis for 100% of patients when technically feasible. Moreover, the 20-gauge CBN yielded core tissue for 90% patients, which was a performance superior to that of the 22-gauge needle. (Gut Liver 2019;13:349-355)
Atsushi Kuno,Masaharu Nomura,Hideki Matsuzaki,Tomoko Nakagawa,Atsushi Matsuda,Yoshitoshi Hirao,Masao Sasaki,Norihiro Ikeda,Toshitaka Nagao,Yuzuru Ikehara,Hisashi Narimatsu 한국당과학회 2012 한국당과학회 학술대회 Vol.2012 No.1
Cell glycome is defined by the glyco synthesis machinery regulated by harmonized expression of more than 100 glycogenes. The machinery-dependent glycome drastically shifts during cell progression and differentiation in association with tumorigenesis and malformation, and thus it motivates us to discover the disease-related alteration in glycosylation. Glycan-targeted histochemical approaches using lectin and anti-glycogene antibodies have provided some key information to characterize specific histological types of cells in pathology. However, this approach is not suitable for the comprehensive analysis targeting the cell glycome, and thus may fail to provide insight into glycome shift during the disease progression. Several years ago, we developed the methodology for rapid and systematic glycome shift analysis targeting formalin-fixed tissue specimens by means of lectin microarray. The resultant method enabled simultaneous observation of over 40 lectins interacted with glycoproteins in 1 mm2 of the tissue specimens. Recently, we sophisticated this methodology to be suitable for comparative analysis of a series of cells in specific groups isolated from a single tissue specimen by laser microdissection, and now our research has gained interest in the variability and distribution of cell glycome in the tissue, i.e., “tissue glycome mapping”. In this meeting, we will summarize the advantage of this new methodology and its application for glyco-biomarker discovery, as well as the construction of “tissue glycome atlas”.