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31.
Atsushi Tsukui Eisuke Saito Masaaki Sato Megumi Michiyama Masatsugu Murase 《Teachers and Teaching》2017,23(6):689-703
This study uses the grounded theory approach (GTA) to investigate the value and characteristics of teacher observations, when used to understand student learning. Earlier studies have analysed the act of observation, defining it as a combination of joint observation and interpretation activities. By contrast, this analysis of 28 primary school teachers in remote areas of Vietnam reveals that the act of observation is mediated by underlying values. This study develops a discussion about the way in which the inherent ‘compliance-with-a-plan’ value restricts teachers’ ability to develop knowledge, as proposed in the literature, while the value of ‘exploration’ encourages teachers to develop a broader interpretation of classroom interactions. Figures and tables illustrate these GTA-based results. 相似文献
32.
This paper presents the construction of a pneumatic active suspension system for a one-wheel car model using fuzzy reasoning and a disturbance observer. The one-wheel car model can be approximately described as a nonlinear two degrees of freedom system subject to excitation from a road profile. The active control is composed of fuzzy and disturbance controls, and the active control force is constructed by actuating a pneumatic actuator. A phase lead-lag compensator is inserted to counter the performance degradation due to the delay of the pneumatic actuator. The experimental result indicates that the proposed active suspension improves much the vibration suppression of the car model. 相似文献
33.
Toshinori Yoshihara Takao Sugiura Nobuyuki Miyaji Yuki Yamamoto Tsubasa Shibaguchi Ryo Kakigi Hisashi Naito Katsumasa Goto Daijiro Ohmori Toshitada Yoshioka 《Journal of Zhejiang University. Science. B》2018,19(11):844-852
We examined the effect of a combination of astaxanthin (AX) supplementation, repeated heat stress, and intermittent reloading (IR) on satellite cells in unloaded rat soleus muscles. Forty-nine male Wistar rats (8-week-old) were divided into control, hind-limb unweighting (HU), IR during HU, IR with AX supplementation, IR with repeated heat stress (41.0–41.5 °C for 30 min), and IR with AX supplementation and repeated heat stress groups. After the experimental period, the antigravitational soleus muscle was analyzed using an immunohistochemical technique. Our results revealed that the combination of dietary AX supplementation and heat stress resulted in protection against disuse muscle atrophy in the soleus muscle. This protective effect may be partially due to a higher satellite cell number in the atrophied soleus muscle in the IR/AX/heat stress group compared with the numbers found in the other groups. We concluded that the combination treatment with dietary AX supplementation and repeated heat stress attenuates soleus muscle atrophy, in part by increasing the number of satellite cells. 相似文献
34.
The model minority began as an ideology pitting Japanese Americans against African Americans, using the former's economic success to deflect assertions of the persistence of race. In stressing enmity, research on black attitudes toward Asian Americans points to the utility of the myth in segmenting the two communities. The thrust of reporting on Japanese America in thirty seven black newspapers from 2000 to 2010 shows something different. Two frames emerge: Japanese Americans function as a reference group serving to reinforce the historical substance of racial profiling of minorities, and as a role model for developing a strategy for black efforts at reparations. 相似文献
35.
By the twentieth century, Black intellectuals envisioned Japan as a beacon of their own possibilities. Japanese perceptions of this bond are typically implicitly assumed in most research on the subject. In this essay we argue that Japan saw Black America as a symbol of strategic not substantive solidarity. With its entrance onto the international scene in the nineteenth century, Japan encountered an international racial hierarchy, and struggled in formulating an emergent self-identity that would allow it to rationalize its rightful place alongside White Western powers. On the eve of the Second World War, Japan's national/racial identity is a complex set of influences: a merging of its own indigenous perceptions of race, an importation of outside racial ideology, and contextual needs linked to still trying to insert itself as an equal to Western powers. 相似文献
36.
In Mongolian, two different alphabets are used, Cyrillic and Mongolian. In this paper, we focus solely on the Mongolian language using the Cyrillic alphabet, in which a content word can be inflected when concatenated with one or more suffixes. Identifying the original form of content words is crucial for natural language processing and information retrieval. We propose a lemmatization method for Mongolian. The advantage of our lemmatization method is that it does not rely on noun dictionaries, enabling us to lemmatize out-of-dictionary words. We also apply our method to indexing for information retrieval. We use newspaper articles and technical abstracts in experiments that show the effectiveness of our method. Our research is the first significant exploration of the effectiveness of lemmatization for information retrieval in Mongolian. 相似文献
37.
Aerodynamic properties of an archery arrow 总被引：1，自引：0，他引：1
Takeshi Miyazaki Keita Mukaiyama Yuta Komori Kyouhei Okawa Satoshi Taguchi Hiroki Sugiura 《Sports Engineering》2013,16(1):43-54
Two support-interference-free measurements of aerodynamic forces exerted on an archery arrow (A/C/E; Easton Technical Products) are described. The first measurement is conducted in a wind tunnel with JAXA’s 60 cm Magnetic Suspension and Balance System, in which an arrow is suspended and balanced by magnetic force against gravity. The maximum wind velocity is 45 m/s, which is less than a typical velocity of an arrow (about 60 m/s) shot by an archer. The boundary layer of the arrow remains laminar in the measured Re number range (4.0 × 103 < Re < 1.5 × 104), and the drag coefficient is about 1.5 for Re > 1.0 × 104. The second measurement is performed by a free flight experiment. Using two high-speed video cameras, we record the trajectory of an archery arrow and analyze its velocity decay rate, from which the drag coefficient is determined. In order to investigate Re number dependence of the drag coefficient in a wider range (9.0 × 103 < Re < 2.4 × 104), we have developed an arrow-shooting system using compressed air as a power source, which launches the A/C/E arrow at an arbitrary velocity up to 75 m/s. We attach two points (piles) of different type (streamlined and bullet) to the arrow-nose. The boundary layer is laminar for both points for Re less than about 1.2 × 104. It becomes turbulent for Re larger than 1.2 × 104 and the drag coefficient increases to about 2.6, when the bullet point is attached. In the same Re range, two values of drag coefficient are found for the streamlined point, of which the lower value is about 1.6 (laminar boundary layer) and the larger value is about 2.6 (turbulent boundary layer), confirming that the point-shape has a crucial influence on the laminar to turbulent transition of the boundary layer. 相似文献
38.
This paper aims to discuss the challenges in the process of building a learning community in Vietnamese primary schools. Five lessons emerge from the cases. First, changing teachers’ beliefs is time-consuming. Second, because of the reluctance of teachers to change, large-scale delivery of the educational project should be critically revisited with regard to its effectiveness. Third, learning community requires the building of trust among actors, including external resource persons. Fourth, external resource persons should continue learning sincerely to gain teachers’ trust. Fifth, the concept of sustainability should be revisited as something that is never-ending and that cannot reach perfection. 相似文献