600 research outputs found
Effects of static stretching for 30 seconds and dynamic stretching on leg extension power.
No full textYamaguchi, T., and K. Ishii. Effects of static stretching for 30 seconds and dynamic stretching on leg extension power. J. Strength Cond. Res. 19(3):677–683. 2005.—The purposes of this study were to clarify the effects of static stretching for 30 seconds and dynamic stretching on leg extension power. Eleven healthy male students took part in this study. Each subject performed static stretching and dynamic stretching on the 5 muscle groups in the lower limbs and nonstretching on separate days. Leg extension power was measured before and after the static stretching, dynamic stretching, and nonstretching. No significant difference was found between leg extension power after static stretching (1788.5 ± 85.7 W) and that after nonstretching (1784.8 ± 108.4 W). On the other hand, leg extension power after dynamic stretching (2022.3 ± 121.0 W) was significantly (p < 0.01) greater than that after nonstretching. These results suggest that static stretching for 30 seconds neither improves nor reduces muscular performance and that dynamic stretching enhances muscular performance
Acute effect of static stretching on power output during concentric dynamic constant external resistance leg extension.
No full textYamaguchi, T., K. Ishii, M. Yamanaka, and K. Yasuda. Acute effect of static stretching on power output during concentric dynamic constant external resistance leg extension. J. Strength Cond. Res. 20(4):804–810. 2006.—The purpose of the present study was to clarify the effect of static stretching on muscular performance during concentric isotonic (dynamic constant external resistance [DCER]) muscle actions under various loads. Concentric DCER leg extension power outputs were assessed in 12 healthy male subjects after 2 types of pretreatment. The pretreatments included (a) static stretching treatment performing 6 types of static stretching on leg extensors (4 sets of 30 seconds each with 20-second rest periods; total duration 20 minutes) and (b) nonstretching treatment by resting for 20 minutes in a sitting position. Loads during assessment of the power output were set to 5, 30, and 60% of the maximum voluntary contractile (MVC) torque with isometric leg extension in each subject. The peak power output following the static stretching treatment was significantly (p < 0.05) lower than that following the nonstretching treatment under each load (5% MVC, 418.0 ± 82.2 W vs. 466.2 ± 89.5 W; 30% MVC, 506.4 ± 82.8 W vs. 536.4 ± 97.0 W; 60% MVC, 478.6 ± 77.5 W vs. 523.8 ± 97.8 W). The present study demonstrated that relatively extensive static stretching significantly reduces power output with concentric DCER muscle actions under various loads. Common power activities are carried out by DCER muscle actions under various loads. Therefore, the result of the present study suggests that relatively extensive static stretching decreases power performance
Psyllaephagus iwayaensis Ishii 1928
No full textPsyllaephagus iwayaensis Ishii, 1928 Psyllaephagus iwayaensis Ishii, 1928: 128. Type material examined. LECTOTYPE: ♀ (here designated), (No. 145), Mountain Iwaya near Nagasaki, from psyllid found on Cinnamomum sp., 3.vi.1925, T. Ishii lgt. PARALECTOTYPES: 5 ♀♀, same data as lectotype. Additional material examined. 3 ♀♀, Matsuyama, ex Trioza cinnamomi, 1.–5.v.1956, T. Tachikawa lgt. & det.; 1 ♀ (on slide), Matsuyama, ex T. cinnamomi, 1.v.1956, T. Tachikawa lgt. & det. (ELKU). Distribution. Japan: Kyushu, Shikoku (TACHIKAWA 1963a). Endemic. Comments. It is worth noting that the mesoscutum of the type specimens has a metallic blue-violet to golden lustre which contrasts with the green-bronze and golden lustre of the scutellum and gaster. In the TRJAPITZIN’ s (1989) key to species of Psyllaephagus, couplet 63 is erroneous in that the marginal and postmarginal veins are both shorter than the stigmal vein, the ocelli form an 80° angle and AOL is less than POL. The same author incorrectly states that the mesoscutum and scutellum are with light purple-green metallic reflection, the postmarginal and marginal veins are as long as stigmal vein, the ocelli form a 60° angle and AOL is as long as POL.Published as part of Japoshvili, George, Higashiura, Yoshimitsu & Kamitani, Satoshi, 2016, A review of Japanese Encyrtidae (Hymenoptera), with descriptions of new species, new records and comments on the types described by Japanese authors, pp. 345-401 in Acta Entomologica Musei Nationalis Pragae 56 (1) on page 390, DOI: 10.5281/zenodo.530683
Voices to Truth America! Exploring Hapa-ish
No full textIn his narrative, author Jonathan Ishii delves into the experience of growing up as a hapa. This narrative reflects on some past building events and realizations, as well as his search for identity and drive for success. Ishii provides a glimpse into his life through various experiences and his discovery of identities in Los Angeles and abroad
The impact of semantic clustering on the learning of abstract words
No full textAbstractIt has been repeatedly argued among vocabulary researchers that semantically related words should not be taught simultaneously because they might interfere with each other. However, the types of relatedness that cause interference have rarely been examined carefully. In addition, past studies that have examined this issue disagree, with some providing results showing that semantic clustering does not cause interference and confusion. Reviewing the literature on working memory, a previous paper by the author indicated that psychologists have long seen visual stimulus as an important component of information processing. Researchers of vocabulary learning have also witnessed some evidence that learners do resort to visual imagery when trying to remember new words. Based on such psychological and applied linguistic research, previous research by the author revealed that visually related items may cause confusion despite the lack of semantic connection. Conversely, visually controlled, semantically related items do not seem to cause confusion. This paper presents the follow-up study, examining the learning of semantically related abstract words that do not have concrete visual images. No evidence to indicate any confusion in the learning of such items was obtained. This supports the working hypothesis that the impeding effect of semantic clustering repeatedly reported in the past could partly be due to the shared visual features of semantically similar words
The Japanese American experience
No full textA document regarding a presentation by Amy Uno Ishii recounting the Japanese American experience of forced removal and incarceration during World War II.The Horita Family Papers (1940-2010, undated) collection contains documents from the Horita family, a Japanese American family from the Los Angeles area. The collection focuses on married couple Chitoshi "Harry" Horita (1896-1990) and Marue Nakashima Horita (1901-1982) and their extended family and includes records of the family's incarceration at the Poston (Colorado River) incarceration camp, research into the family's history, photographs, and correspondence
CENP-Aの局在をセントロメアの一領域に制限する機構の解明
No full textTeppei Kitagawa, Kojiro Ishii, Kojiro Takeda and Tomohiro Matsumoto. The 19S proteasome subunit Rpt3 regulates distribution of CENP-A by associating with centromeric chromatin. Nature communications, 5;3597, DOI: 10.1038/ncomms4597 http://www.nature.com/ncomms/2014/140407/ncomms4597/full/ncomms4597.html京都大学0048新制・課程博士博士(生命科学)甲第18625号生博第316号新制||生||42(附属図書館)31525京都大学大学院生命科学研究科統合生命科学専攻(主査)教授 松本 智裕, 教授 石川 冬木, 教授 上村 匡学位規則第4条第1項該当Doctor of Philosophy in Life SciencesKyoto UniversityDFA
Analysis of Reentrant Hybrid Tee
No full textThe conventional hybrid tee, which is symmetrical and reciprocal, has been used exclusively in mixer and impedance bridges in microwave engineering. The interconnection of the E-arm and H-arm of the hybrid tee through a 90-degree twist and a phase-shifter by Ishii and Jenners has turned the magic tee into a reentrant hybrid tee with different properties. Ishii and Jenners\u27 paper on the different attenuation levels of port 1 and port 2 of the reentrant hybrid tee has aroused the public interest about the characteristics of the reentrant hybrid tee. It is intended in this study to investigate the characteristics of the reentrant hybrid tee experimentally and theoretically. In the experiment, the author has done the measurements about attenuation, VSWR and impedance against the variation of frequency or phase-shifter setting of the reentrant loop. In theory, the author has derived a general equation for the reentrant hybrid tee, in terms of the scattering parameters of a basic hybrid tee. Conclusions were made about the reentrant hybrid tee by combining the experimental results and theoretical equations
Student-Generated OERs in the Art History Classroom
No full textThis presentation shares the experiences and motivations of Dr. Sara Ishii-Bear, Art History and Visual Culture professor, in guiding undergraduate students’ creation of open educational resources (OERs). The construction of OERs reflects her interest in feminist pedagogy and open educational practices, which aims to create a learner-centered classroom that values accessibility, equity, and cultural responsiveness. Ishii-Bear will discuss a scaffolded assignment that guided students in researching and writing open-access lesson plans, which resulted in the students’ work being published on the OERTX Repository website. Student-generated materials also give students the opportunity to focus on the topics that interest them the most. Such a move is especially valuable given TWU’s diverse demographics. Due to the historical marginalization of women’s and people of colors’ voices in art history, the inclusion of women students of colors’ research is valuable to art history pedagogy. Ishii-Bear will also discuss the results of an anonymous student survey to reveal the students’ opinions on working with a group to author an OER. In the last portion of the presentation, Ishii-Bear will reflect on how the project might be tailored for future iterations of the course
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