排序方式： 共有18条查询结果，搜索用时 78 毫秒
1.
Seitaro Kumamoto Kenshiro Nakatake Souichiro Fukuyama Keiichiro Yasuda Yusuke Kitamura Masaaki Iwatsuki Hideo Baba Toshihiro Ihara Yoshitaka Nakanishi Yuta Nakashima 《Biomicrofluidics》2020,14(6)
To study an environmental or biological solution, it is essential to separate its constituents. In this study, a 3D-deformable dynamic microfilter was developed to selectively separate the target substance from a solution. This microfilter is a fine metallic nickel structure fabricated using photolithography and electroplating techniques. It is gold-coated across its entire surface with multiple slits of 10–20 μm in width. Its two-dimensional shape is deformed into a three-dimensional shape when used for fluid separation due to hydrodynamic forces. By adjusting the pressure applied to the microfilter, the size of the gap created by deformation can be changed. To effectively isolate the target substance, the relationship between the solution flow rate and the extent of microfilter deformation was investigated. The filtration experiments demonstrated the microfilter’s ability to isolate the target substance with elastic deformation without undergoing plastic deformation. Additionally, modification of the microfilter surface with nucleic acid aptamers resulted in the selective isolation of the target cell, which further demonstrates the potential application of microfilters in the isolation of specific components of heterogeneous solutions. 相似文献
2.
Kazumi Masuda Nobuo Kikuhara Hideyuki Takahashi Kunio Yamanaka 《Journal of sports sciences》2013,31(10):851-858
Abstract The aim of the present study was to examine the relationships between muscle cross-sectional area (CSA) and muscular strength in terms of knee extension and flexion, hip extension and flexion, and hip abduction and adduction among well-trained soccer players. Fourteen university soccer players participated in the study, who had previously been divided into two groups based on ability (Group A: above-average ability; Group B: average ability). Maximal isokinetic and concentric muscular strength was measured in knee extension/flexion, hip extension/flexion and hip abduction/adduction using an isokinetic dynamometer at 1.57 and 4.19 rad·s?1 (3.14 rad·s?1) in both the dominant and non-dominant leg. The CSAs of the thigh, gluteus muscles and iliopsoas muscles were calculated based on magnetic resonance imaging. There was no significant difference between the two groups in muscle CSA and isokinetic strength. Although there were some statistically significant differences between the dominant and non-dominant leg in terms of CSA and strength (P<0.05–0.01), these were small and negligible. Apart from a non-significant relationship between the CSAs of the adductor muscles and hip adductor strength (r<0.26, n.s.), the CSA of the other muscle groups correlated with maximal isokinetic strength (r=0.38–0.64, P<0.05). These results suggest that no difference in muscle characteristics (in terms of muscle CSA and strength) was apparent among well-trained soccer players, even between the dominant and non-dominant leg. There is also a case that the anatomical function of a single (or group of) muscle(s) may not be reflected by the strength—CSA relationship depending on the movements (such as hip adduction-adductor muscle CSA). Thus, further studies are required to develop methods to assess neuromuscular function in relation to muscle morphology among soccer players. 相似文献
3.
4.
The aim of this study was to determine the variations in substrate utilization between men and women matched for ventilatory threshold (Tvent) during incremental arm cranking and leg cycling exercise at 70, 85, 100 and 115% of the mode-specific Tvent. Recreationally active men (n=12) and women (n=10) with similar values for percentage of peak oxygen consumption at Tvent participated in the study. Ventilatory equivalence, excess CO2 and modified V-slope methods were used concurrently to determine Tvent. The participants performed 5 min of exercise at each of 70, 85, 100 and 115% Tvent during both arm cranking and leg cycling exercise. The females were tested during the early follicular phase for all trials. A two-way mixed-design analysis of variance was performed to test for differences between the sexes. When carbohydrate and fat oxidation were expressed relative to total fat-free mass, carbohydrate oxidation during arm cranking and leg cycling was significantly higher in men than women at each percentage of Tvent. In contrast, women showed significantly higher fat oxidation across intensities during both arm cranking and leg cycling. Our results suggest that when substrate utilization is expressed relative to total fat-free mass, women appear to maintain a higher rate of fat and lower rate of carbohydrate oxidation than men during both incremental arm cranking and leg cycling exercise relative to Tvent. 相似文献
5.
Tsutomu Hirao Manabu Okumura Norihito Yasuda Hideki Isozaki 《Information processing & management》2007,43(6):1521
The high quality evaluation of generated summaries is needed if we are to improve automatic summarization systems. Although human evaluation provides better results than automatic evaluation methods, its cost is huge and it is difficult to reproduce the results. Therefore, we need an automatic method that simulates human evaluation if we are to improve our summarization system efficiently. Although automatic evaluation methods have been proposed, they are unreliable when used for individual summaries. To solve this problem, we propose a supervised automatic evaluation method based on a new regression model called the voted regression model (VRM). VRM has two characteristics: (1) model selection based on ‘corrected AIC’ to avoid multicollinearity, (2) voting by the selected models to alleviate the problem of overfitting. Evaluation results obtained for TSC3 and DUC2004 show that our method achieved error reductions of about 17–51% compared with conventional automatic evaluation methods. Moreover, our method obtained the highest correlation coefficients in several different experiments. 相似文献
6.
Nobuo Masataka 《Early education and development》2002,13(2):187-200
The factor structure and scale characteristics of the shortened version of the Social Competence and Behavior Evaluation are presented for a Japanese sample, as well as age and gender differences in the prevalence of emotional and behavioral problems and social competence throughout the preschool years. Principal-components analyses identified three factors; 1) social competence (SC), 2) anger-aggression (AA), and 3) anxiety-withdrawal (AW). Each scale was shown to have high internal consistency. Overall, the results were extremely consistent with the previous findings on the U.S. and the Canadian samples. However, the scores were lower in the Japanese sample than in the U.S. and the Canadian samples on AA and AW. This feature is discussed in terms of the characteristics of the Japanese society as compared to Western societies. 相似文献
7.
Peter LaFreniere Nobuo Masataka Marina Butovskaya Qin Chen Maria Auxiliadora Dessen Klaus Atwanger Susanne Schreiner Rosario Montirosso Alessandra Frigerio 《Early education and development》2002,13(2):201-220
A multi-national study using the Social Competence and Behavior Evaluation Inventory (SCBE-30) was conducted to investigate preschool children's social and emotional development across cultures. A total of 4,640 children from eight participating countries, including Austria, Brazil, Canada, China, Italy, Japan, Russia, and the United States were evaluated by their preschool teachers. The main objective of the study was to validate the SCBE-30 in each country and build a cross-cultural data set for the investigation of universals, as well as cultural differences, in the development of preschool children's social competence and the frequency and type of their behavioral problems. Results provide a clear case for the structural equivalence of the SCBE-30 across all samples, for universals in the structure of early social behavior, and possibly some differences that may be attributed to culture. The pattern of gender differences found in North American samples was found to generalize across cultural contexts as preschool boys were universally reported to be significantly more aggressive and viewed as less socially competent than girls. Age differences were also found in all eight samples reflecting increasing competence in older children, however age trends in the prevalence of behavior problems were culture specific. 相似文献
8.
Masataka N 《Journal of deaf studies and deaf education》2006,11(2):139-143
Previous research has demonstrated that both hearing adults and hearing children with no training in arithmetic successfully performed approximate arithmetic on large sets of elements. Here, the possibility is explored that the same phenomenon can be confirmed in deaf adults who have acquired a signed language as their first language. Results reveal that they can perform simple arithmetic subtraction on nonsymbolic numerosities. Their performance levels were even higher than those of hearing adults who participated in the experiment as a control group. On the other hand, the performance levels of subtraction of the deaf adults in the formal mathematics were lower than those of the hearing adults. The findings are argued in terms of the characteristics of cognitive capabilities the deaf adults acquired through their development. 相似文献
9.
Yoshihisa Hirakawa Mayu Yasuda Uemura Chifa Chiang Atsuko Aoyama 《Educational gerontology》2018,44(4):211-219
The purpose of this study is twofold: to assess the acceptance and usefulness of Nagoya University Small Private Online Courses, which is an online end-of-life care educational program through popular social media designed to supplement traditional end-of-life care education among healthcare professionals and to get constructive feedback with the aim of enhancing the impact of the program on fundamental knowledge of and attitudes toward end-of-life care provision. All 107 participants nationwide enrolled in this educational program completed the entire study. We found evidence of the beneficial effect of the social media strategies on participants’ knowledge and practice toward end-of-life care. In addition, data analyses provided insights into modifiable factors associated with learners’ active participation. 相似文献
10.