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Search Results: 1 - 10 of 1211 matches for " Tomoko Adachi "
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A Multi-Secret Sharing Scheme with Many Keys Based on Hermite Interpolation  [PDF]
Tomoko Adachi, Chie Okazaki
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.213140
Abstract: A secret sharing scheme is one of cryptographies. A threshold scheme, which is introduced by Shamir in 1979, is very famous as a secret sharing scheme. We can consider that this scheme is based on Lagrange's interpolation formula. A secret sharing scheme has one key. On the other hand, a multi-secret sharing scheme has more than one keys; that is, a multi-secret sharing scheme has p (2) keys. Dealers distribute shares of keys among n participants. Gathering t (n) participants, keys can be reconstructed. In this paper, we give a scheme of a (t,n) multi-secret sharing based on Hermite interpolation, in the case of pt.
Some Sequence of Wrapped Δ-Labellings for the Complete Bipartite Graph  [PDF]
Tomoko Adachi, Daigo Kikuchi
Applied Mathematics (AM) , 2015, DOI: 10.4236/am.2015.61019
Abstract: The design of large disk array architectures leads to interesting combinatorial problems. Minimizing the number of disk operations when writing to consecutive disks leads to the concept of “cluttered orderings” which were introduced for the complete graph by Cohen et al. (2001). Mueller et al. (2005) adapted the concept of wrapped Δ-labellings to the complete bipartite case. In this paper, we give some sequence in order to generate wrapped Δ-labellings as cluttered orderings for the complete bipartite graph. New sequence we give is different from the sequences Mueller et al. gave, though the same graphs in which these sequences are labeled.
Results of Dating Violence Prevention Education for Japanese High School Boys  [PDF]
Tomoko Suga
Open Journal of Social Sciences (JSS) , 2017, DOI: 10.4236/jss.2017.512013
Abstract:
We conducted a class on domestic violence (DV) prevention for 234 high school boys (intervention group: 154 boys, non-intervention group: 80 boys) and verified its effect on the boys. The program dealt with respect, relationships and types of violence. The factor analysis of a questionnaire survey conducted before the class on DV prevention revealed that the high school boys’ understanding of “a relationship” and “a coercive behavior” was weak. Therefore, after conducting the class on DV prevention, we tested whether there was an improvement in their understanding of the terms “relationship” and “coercive behavior”. To understand whether boys’ understanding of “relationships” showed any change after the class, a comparison of the intervention and the non-intervention groups was carried out at four different time points—before the class on DV prevention, after the class, after a month, and after six months. A 2-factorial analysis of variance (repeated measures) was conducted. The results revealed that no mutual points of interaction were seen with the different measurement times based on the presence or absence of intervention (F (3,696) = 0.995, n.s.). To understand whether the term “coercive behaviors” changed boys’ understanding of the term after the class, the comparison from the results before the class till six months later showed significant mutual interactions with the measurement times based on the presence or absence of intervention (F (3,696) = 4.48, p < 0.01). From this study, it is clear that interventions such as a single class on DV prevention can help boys understand the term “coercive acts” and have an impact on their minds for a long time. However, the same may not be true in their understanding of “relationships”.
Japanese Educators’ Knowledge of DV  [PDF]
Tomoko Suga
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.62002
Abstract:
In the present research, a survey of the Domestic Violence (DV) related experience, knowledge, understanding of characteristics, and opinions on prevention of 244 Japanese educators was conducted. It cannot be overlooked that 8.0% of the 244 educators had experience suffering from DV. Additionally, 28.8% of the educators had experience taking a training or class on DV, and 34.0% had experience studying DV through books, etc. It was revealed from the present survey that roughly 30% of the educators had educational experience related to DV. Also it was revealed that 90.7% of female educators and 85.9% of male educators who were subjects of the present study thought that “It’s best if DV prevention is implemented during middle school and high school classes.” Educators who had studied DV through books, etc. understood six out of seven items about the characteristics of DV, which was more than those who had not studied DV. Additionally, those who had experience taking a training or class understood in detail three questions out of seven, which was more than those without experience. It is important to provide opportunities for training that would lead to learn the correct knowledge about DV for educators.
An Analysis of Surveys on Domestic Violence by Japan’s Cabinet Office (1999-2017)  [PDF]
Tomoko Suga
Open Journal of Social Sciences (JSS) , 2018, DOI: 10.4236/jss.2018.67005
Abstract: Japan’s Cabinet Office conducted surveys on DV seven times (1999, 2002, 2005, 2008, 2011, 2014, 2017). As a secondary source, we used the data on the Cabinet Offices website. In 2001, the first DV law, the Act on the Prevention of Spousal Violence was passed, after which the Japanese public began to recognize DV. Based on the question item on “domestic violence from a spouse” the data of the Cabinet Office’s survey from 2005 to 2017 indicated that on average, just over 30% of women experienced DV, while just under 20% of men did. These figures have not changed much. The proportions of victims who use advisory services have increased with every survey due to political movements and Japanese policy. In 2017, the data showed that a little less than 58% of women and almost 27% of men used advisory services. The most recent survey conducted in 2017, showed that people who do not separate from their spouse experience DV. In terms of the reasons that they do not separate, “children” weighed high on the list.
A New Algorithm for Generalized Least Squares Factor Analysis with a Majorization Technique  [PDF]
Kohei Adachi
Open Journal of Statistics (OJS) , 2015, DOI: 10.4236/ojs.2015.53020
Abstract: Factor analysis (FA) is a time-honored multivariate analysis procedure for exploring the factors underlying observed variables. In this paper, we propose a new algorithm for the generalized least squares (GLS) estimation in FA. In the algorithm, a majorization step and diagonal steps are alternately iterated until convergence is reached, where Kiers and ten Berge’s (1992) majorization technique is used for the former step, and the latter ones are formulated as minimizing simple quadratic functions of diagonal matrices. This procedure is named a majorizing-diagonal (MD) algorithm. In contrast to the existing gradient approaches, differential calculus is not used and only elmentary matrix computations are required in the MD algorithm. A simuation study shows that the proposed MD algorithm recovers parameters better than the existing algorithms.
Effects of 16-Week Consumption of Caffeinated and Decaffeinated Instant Coffee on Glucose Metabolism in a Randomized Controlled Trial
Keizo Ohnaka,Mizuko Ikeda,Takako Maki,Tomoko Okada,Takao Shimazoe,Masahiro Adachi,Masatoshi Nomura,Ryoichi Takayanagi,Suminori Kono
Journal of Nutrition and Metabolism , 2012, DOI: 10.1155/2012/207426
Abstract: Objective. Observational studies have shown a protective association between coffee consumption and type 2 diabetes mellitus whereas caffeine or caffeinated coffee acutely deteriorates glucose tolerance. We investigated the effects of chronic drinking of instant coffee on glucose and insulin concentrations during a 75 g oral glucose tolerance test. Methods. Overweight men with a mild-to-moderate elevation of fasting plasma glucose were randomly allocated to a 16-week intervention of consuming 5 cups of caffeinated () or decaffeinated () instant coffee per day or no coffee (). Results. The caffeinated coffee group showed statistically significant decreases in the 2-hour concentrations and the area under the curve of glucose while neither decaffeinated coffee nor coffee group showed such a change. Waist circumstance decreased in the caffeinated coffee group, increased in the decaffeinated coffee group, and did not change in the noncoffee group (). With adjustment for the change in waist circumference, caffeinated and decaffeinated coffee consumption were associated with a modest decrease in the postload glucose levels. Conclusion. Both caffeinated and decaffeinated coffee may be protective against deterioration of glucose tolerance.
The development of a mini-array for estimating the disease state of gastric adenocarcinoma by array CGH
Tomoko Furuya, Tetsuji Uchiyama, Atsushi Adachi, Takae Okada, Motonao Nakao, Atsunori Oga, Song-Ju Yang, Shigeto Kawauchi, Kohsuke Sasaki
BMC Cancer , 2008, DOI: 10.1186/1471-2407-8-393
Abstract: Initially, the DNA copy number aberrations (DCNAs) were analyzed by array-based comparative genomic hybridization (aCGH) in 83 gastric adenocarcinomas as a training-sample set. Next, two independent analytical methods were applied to the aCGH data to identify the BAC clones with DNA copy number aberrations that were linked with the disease states. One of the methods, a decision-tree model classifier, identified 6, 4, 4, 4, and 7 clones for estimating lymph node metastasis, liver metastasis, peritoneal dissemination, depth of tumor invasion, and histological type, respectively. In the other method, a clone-by-clone comparison of the frequency of the DNA copy number aberrations selected 26 clones to estimate the disease states.By spotting these 50 clones together with 26 frequently or rarely involved clones and 62 reference clones, a mini-array was made to estimate the above parameters, and the diagnostic performance of the mini-array was evaluated for an independent set of 30 gastric cancers (blinded – sample set). In comparison to the clinicopathological features, the overall accuracy was 66.7% for node metastasis, 86.7% for liver metastasis, 86.7% for peritoneal dissemination, and 96.7% for depth of tumor invasion. The intratumoral heterogeneity barely affected the diagnostic performance of the mini-array.These results suggest that the mini-array makes it possible to determine an optimal treatment for each of the patients with gastric adenocarcinoma.Gastric adenocarcinoma is one of the most frequent cancers worldwide, and it is the second leading cause of cancer death [1]. Although new diagnostic and therapeutic procedures are being developed, many patients still nevertheless die of the disease. The improvement of prognosis by the most optimal treatment is the first priority for all cancer patients. It is true that detection is critical to a rapid cure, though under the present circumstances gastric cancers are detected at various stages. The treatment strategy usu
Associations between dietary n-6 and n-3 fatty acids and arachidonic acid compositions in plasma and erythrocytes in young and elderly Japanese volunteers
Terue Kawabata, Satoko Hirota, Tomoko Hirayama, Naoko Adachi, Yoshinori Kaneko, Noriko Iwama, Keiko Kamachi, Eiji Araki, Hiroshi Kawashima, Yoshinobu Kiso
Lipids in Health and Disease , 2011, DOI: 10.1186/1476-511x-10-138
Abstract: We further analyzed data in four study groups with different ages and sexes, and determined that the blood ARA levels were affected by the kinds of dietary fatty acids ingested.One hundred and four healthy young and elderly volunteers were recruited. Dietary records together with photographic records from 28 consecutive days were reviewed and the fatty acid composition in plasma lipid fractions and erythrocyte PL was analyzed.No correlations for ARA between dietary fatty acids and blood lipid fractions were observed. A significant negative correlation between eicosapentaenoic acid (EPA) + docosahexaenoic acid (DHA) intake and ARA composition in erythrocyte PL was observed. ARA composition in erythrocyte PL was significantly lower in elderly subjects than in young subjects, because EPA and DHA intake in elderly subjects was higher than in young subjects. However, after removing the effect of dietary EPA+DHA intake, the ARA composition in erythrocyte PL in elderly subjects was significantly lower than that in young subjects.Changes in physical conditions with aging influenced the low ARA composition of erythrocyte in elderly subjects in addition to the effects of dietary EPA and DHA.Arachidonic acid (ARA), one of the n-6 polyunsaturated fatty acids (PUFA), is the predominant fatty acid (FA) of membrane phospholipids (PL) in mammalian brain and neural tissues [1,2]. ARA rapidly accumulates in the human brain during the growth spurt that starts at the beginning of the third trimester of pregnancy and remains in high demand until about 2 years of age [3,4].Many studies in the last decade have shown the role of sufficient intake of n-3 PUFA in the prevention of several diseases, particularly coronary heart disease [5-7]. Eicosanoids made from ARA are generally more potent mediators of inflammation, vasoconstriction, and platelet aggregation than those made from the eicosapentaenoic acid (EPA) of n-3 PUFA, so a lower intake of vegetable oil containing abundant linoleic aci
Effects of 16-Week Consumption of Caffeinated and Decaffeinated Instant Coffee on Glucose Metabolism in a Randomized Controlled Trial
Keizo Ohnaka,Mizuko Ikeda,Takako Maki,Tomoko Okada,Takao Shimazoe,Masahiro Adachi,Masatoshi Nomura,Ryoichi Takayanagi,Suminori Kono
Journal of Nutrition and Metabolism , 2012, DOI: 10.1155/2012/207426
Abstract: Objective. Observational studies have shown a protective association between coffee consumption and type 2 diabetes mellitus whereas caffeine or caffeinated coffee acutely deteriorates glucose tolerance. We investigated the effects of chronic drinking of instant coffee on glucose and insulin concentrations during a 75?g oral glucose tolerance test. Methods. Overweight men with a mild-to-moderate elevation of fasting plasma glucose were randomly allocated to a 16-week intervention of consuming 5 cups of caffeinated ( ) or decaffeinated ( ) instant coffee per day or no coffee ( ). Results. The caffeinated coffee group showed statistically significant decreases in the 2-hour concentrations and the area under the curve of glucose while neither decaffeinated coffee nor coffee group showed such a change. Waist circumstance decreased in the caffeinated coffee group, increased in the decaffeinated coffee group, and did not change in the noncoffee group ( ). With adjustment for the change in waist circumference, caffeinated and decaffeinated coffee consumption were associated with a modest decrease in the postload glucose levels. Conclusion. Both caffeinated and decaffeinated coffee may be protective against deterioration of glucose tolerance. 1. Introduction Observational studies have consistently shown a protective association between coffee consumption and type 2 diabetes mellitus [1, 2]. Both caffeinated and decaffeinated coffee seem to be associated with a decreased risk of type 2 diabetes mellitus [3, 4], although a prospective study suggested a stronger association with decaffeinated coffee [5]. On the other hand, it is well documented that the ingestion of caffeine or caffeinated coffee acutely deteriorates glucose tolerance, as assessed by postprandial plasma glucose concentrations [6–10]. Caffeine administration is also shown to decrease the insulin-mediated glucose disposal in the hyperinsulinemic-euglycemic glucose clamp procedure in humans [11, 12]. It is thus hypothesized that coffee compounds other than caffeine exert a beneficial effect on glucose metabolism. Chlorogenic acids are such bioactive compounds of a potent antioxidant property [13, 14]. Alternatively, habitual coffee consumption may be protective against type 2 diabetes mellitus by mechanisms other than postulated for the acute effect of caffeine. Few trials have addressed the long-term effect of caffeine or caffeinated coffee on glucose metabolism. Participants in the intervention group in these studies consumed caffeine (400?mg/day) for one week [15]; filtered coffee (900?mL/day) or
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