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Takahiro MIYAJIMA,Takumi TOKISA,Shinya MAEDA,Hyoungseop KIM,Joo Kooi TAN,Seiji ISHIKAWA,Seiichi MURAKAMI,Takatoshi AOKI 제어로봇시스템학회 2012 제어로봇시스템학회 국제학술대회 논문집 Vol.2012 No.10
Recently, thorax MDCT images are used in visual screening for early detection of lung nodules. Radiologists can easily detect lung nodules on images, but it has enormous images and load of radiologist for visual screening. To reduce the load of radiologist and improve the detection accuracy, a CAD (Computer Aided Diagnosis) system is expected from medical fields. In the medical image processing fields, some related works are reported to develop the CAD system including temporal subtraction technique as helpful technical issues. In this paper, we propose a classification of lung nodules on temporal subtraction image based on image processing technique. At first, the candidate regions including nodules are detected by the multiple threshold technique in terms of the pixel value on the temporal subtraction images. Then, we remove vessel regions on nodules by the most suitable threshold technique and watershed method. Also we remove the false positives which are caused by mis-registration using selective enhancement filter, rule-base method and artificial neural networks. In this paper, we illustrate some experimental result which applied our algorithm to 31 chest MDCT cases including lung nodules.
Abundance of Veillonella spp. does not Reflect Salivary Nitrite Production after Nitrate Ingestion
( Takahiro Mitsui ),( Taichi Ishikawa ),( Ryo Harasawa ),( Minoru Sasaki ) 한국미생물생명공학회(구 한국산업미생물학회) 2020 한국미생물·생명공학회지 Vol.48 No.4
Veillonella spp. have been reported to be the most prevalent nitrate-reducing bacterial species in the oral cavity. The purpose of this study was to examine the relationship between the abundance of Veillonella spp. and nitrite production after nitrate ingestion. Bacterial samples were obtained from the tongue surfaces of 50 university students. The predominant Veillonella spp., V. atypica, V. dispar, and V. rogosae were identified and enumerated using real-time polymerase chain reaction (qPCR). Salivary nitrate and nitrite were measured before and 30, 60, and 90 min after ingestion of 100 ml of beetroot juice. Increased nitrite concentrations were observed in all participants, with a mean increase of 0.61 (0.42-1.10) mM expressed as the median (interquartile range). Veillonella atypica was detected in 40 subjects (80%), V. dispar in 48 (96%), and V. rogosae in 48 (96%), at quantities ranging from 1.3 × 10<sup>2</sup> to 2.8 × 10<sup>7</sup> CFU/ml per subject. The strengths of the correlations of the log colony forming unit (CFU) values of V. atypica, V. dispar, V. rogosae, and the log CFU value of the three species together with the increase in nitrite levels were 0.091, 0.114, -0.228, and 0.060, respectively, none of which were significant (p > 0.05). Our results indicate that the abundance of Veillonella spp. is not related to salivary nitrite production after nitrate ingestion.
Soft Magnetic Properties of Ring-Shaped Fe-Co-B-Si-Nb Bulk Metallic Glasses
Takayuki Ishikawa,Takahiro Tsubota,Teruo Bitoh 한국자기학회 2011 Journal of Magnetics Vol.16 No.4
The reduction of the Nb content in the (Fe0.75B0.20Si0.05)96Nb4 bulk metallic glass (BMG) has been studied. The glass-forming ability (GFA) is reduced by decreasing the Nb content, but it can be enhanced by replacing partially Fe by Co. Furthermore, the saturation magnetization of the (Fe<sub>0.8</sub>Co<sub>0.2</sub>)<sub>76</sub>B<sub>18</sub>Si<sub>3</sub>Nb<sub>3</sub> BMG is 1.35 T, being with 13% larger than that of the base alloy (Fe<sub>0.75</sub>B<sub>0.20</sub>Si<sub>0.05</sub>)<sub>96</sub>Nb₄. (Fe<sub>0.8</sub>Co<sub>0.2</sub>)<sub>76</sub>B<sub>18</sub>Si<sub>3</sub>Nb<sub>3</sub> BMG exhibits slightly larger B<sub>800</sub> (the magnetic flux density at 800 A/m) and smaller core losses (20%-30%) compared with the commercial Fe-6.5 mass% Si steel.
Okuhara, Tsuyoshi,Ishikawa, Hirono,Okada, Hiroko,Kiuchi, Takahiro Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.15
Background: The objective of this study was to assess the readability, suitability, and health content of cancer screening information in municipal newspapers in Japan. Materials and Methods: Suitability Assessment of Materials (SAM) and the framework of Health Belief Model (HBM) were used for assessment of municipal newspapers that were published in central Tokyo (23 wards) from January to December 2013. Results: The mean domain SAM scores of content, literacy demand, and layout/typography were considered superior. The SAM scores of interaction with readers, an indication of the models of desirable actions, and elaboration to enhance readers' self-efficacy were low. According to the HBM coding, messages of medical/clinical severity, of social severity, of social benefits, and of barriers of fear were scarce. Conclusions: The articles were generally well written and suitable. However, learning stimulation/motivation was scarce and the HBM constructs were not fully addressed. Practice implications: Articles can be improved to motivate readers to obtain cancer screening by increasing interaction with readers, introducing models of desirable actions and devices to raise readers' self-efficacy, and providing statements of perceived barriers of fear for pain and time constraints, perceived severity, and social benefits and losses.
Improving quality of common reed (Phragmites communis Trin.) silage with additives
Keigo Asano,Takahiro Ishikawa,Ayako Araie,Motohiko Ishida 아세아·태평양축산학회 2018 Animal Bioscience Vol.31 No.11
Objective: Common reed (Phragmites communis Trin.) could potentially provide an alternative resource for silage; however, its silage quality is poor. The aim of this study was to investigate the factors in reed that contribute to poor quality and determine how the use of additives at ensiling could improve fermentation quality. Methods: In Experiment 1, we determined the chemical composition and the presence of indigenous lactic acid bacteria (LAB) in reed. We further examined fermentation quality of reed silage under conditions without additives (NA) and treated glucose (G), lactic acid bacteria (L), and their combination (G+L). In Experiment 2, silage of NA, and with an addition of cellulase and lactic acid bacteria (CL) were prepared from harvested reed. The harvested reeds were fertilized at nitrogen concentrations of 0, 4, 8, and 12 g N/m2 and were harvested thrice within one year. Results: The indigenous LAB and fermentable carbohydrates are at extremely low concentrations in reed. Reed silage, to which we added G+L, provided the highest quality silage among treatments in Experiment 1. In Experiment 2, N fertilization had no negative effect on silage quality of reed. The harvest times decreased fermentable carbohydrate content in reed. The CL treatment provided a higher lactic acid content compared to the NA treatment. However, the quality of CL treated silage at the second and third harvests was significantly lower than at the first harvest, due to a reduction in carbohydrates caused by frequent harvesting. Conclusion: The causes of poor quality in reed silage are its lack of indigenous LAB and fermentable carbohydrates and its high moisture content. In addition, reed managed by frequent harvesting reduces carbohydrate content. Although the silage quality could be improved by adding CL, higher-quality silage could be prepared by adding fermentable carbohydrates, such as glucose (rather than adding cellulases).
Readability Comparison of Pro- and Anti-Cancer Screening Online Messages in Japan
Okuhara, Tsuyoshi,Ishikawa, Hirono,Okada, Masahumi,Kato, Mio,Kiuchi, Takahiro Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.12
Background: Cancer screening rates are lower in Japan than those in western countries. Health professionals publish procancer screening messages on the internet to encourage audiences to undergo cancer screening. However, the information provided is often difficult to read for lay persons. Further, anti-cancer screening activists warn against cancer screening with messages on the Internet. We aimed to assess and compare the readability of pro- and anti-cancer screening online messages in Japan using a measure of readability. Methods: We conducted web searches at the beginning of September 2016 using two major Japanese search engines (Google.jp and Yahoo!.jp). The included websites were classified as "anti", "pro", or "neutral" depending on the claims, and "health professional" or "non-health professional" depending on the writers. Readability was determined using a validated measure of Japanese readability. Statistical analysis was conducted using two-way ANOVA. Results: In the total 159 websites analyzed, anti-cancer screening online messages were generally easier to read than pro-cancer screening online messages, Messages written by health professionals were more difficult to read than those written by non-health professionals. Claim ${\times}$ writer interaction was not significant. Conclusion: When health professionals prepare pro-cancer screening materials for publication online, we recommend they check for readability using readability assessment tools and improve text for easy comprehension when necessary.