山茱萸属应予重新确认   总被引：1，自引：0，他引：1  

薛祥骥  张如松  张志明  徐炳声 《中国科学院研究生院学报》1984,22(6):461-465

The genus Macrocarpium has been accepted only by a few scholars since its separation from Cornus L. by T. Nakai in 1909. Bentham,  Hooker,  Hutchinson and the others consider that the ovary of Macrocarpium is 2-celled and the genus should be placed back into Cornus. We have discovered that are generally I-celled.  In addition, Macrocarpium is different from Cornus in basic chromosome number  (X),  flowering physiological character,  inflorescence type and involucral scale. Thus the genus Ma-crocarpium (Spach) Nakai should be reaffirmed.  相似文献   

Towards an Internet‐based Education Model for Caribbean Countries     

Emanuel S. Grant  Sam Hsu 《Learning, Media and Technology》2000,25(1):21-30

Advances in the development of the Internet infrastructure can be used within developing countries to enhance the delivery of high quality education to their citizens. The mechanisms used to deliver educational material, over the Internet, range from the very sophisticated Virtual Classrooms (VCs) in which students in cyberspace interact in near real‐time with instructors at remote sites, to the basic non real‐time delivery of lecture contents. In Caribbean territories where the concentration of high‐quality teachers and teaching facilities are in and around urban cities, VCs can be used to enhance the access of students in remote areas to the materials, experiences, and facilities provided at the urban centers. We present a model for virtual classrooms, which is specifically geared toward Caribbean territories. This model leverages the usage of alternative low‐cost technology to offer VC environment to teaching institutions in remote rural districts via the Internet.  相似文献   

Effects of compression garments on surface EMG and physiological responses during and after distance running     

Wei-Chun Hsu  Li-Wen Tseng  Fu-Chun Chen  Li-Chu Wang  Wen-Wen Yang  Yi-Jia Lin  Chiang Liu 《运动与健康科学(英文)》2020,9(6):685-691

BackgroundThe few previous studies that focused on the effects of compression garments (CG) on distance running performance have simultaneously measured electromyogram, physiological, and perceptual parameters. Therefore, this study investigated the effects of CG on muscle activation and median frequency during and after distance running, as well as blood-lactate concentration and rating of perceived exertion (RPE) during distance running.MethodsEight healthy male recreational runners were recruited to randomly perform two 40 min treadmill running trials, one with CG, and the other with control garment made of normal cloth. The RPE and the surface electromyography (EMG) of 5 lower extremity muscles including gluteus maximus (GM), rectus femoris (RF), semitendinosus (ST), tibialis anterior (TA), and gastrocnemius (GAS) were measured during the running trial. The blood-lactate levels before and after the running trial were measured.ResultsWearing CG led to significant lower muscle activation (p < 0.05) in the GM (decreased 7.40%–14.31%), RF (decreased 4.39%–4.76%), and ST (decreased 3.42%–7.20%) muscles; moreover, significant higher median frequency (p < 0.05) in the GM (increased 5.57%) and ST (increased 10.58%) muscles. Wearing CG did not alter the RPE values or the blood-lactate levels (p > 0.05).ConclusionWearing CG was associated with significantly lower muscle activation and higher median frequency in the running-related key muscles during distance running. This finding suggested that wearing CG may improve muscle function, which might enhance running performance and prevent muscle fatigue.  相似文献   

Does emotion matter? An investigation into the relationship between emotions and science learning outcomes in a game-based learning environment     

Meng-Tzu Cheng  Wei-Yu Huang  Mei-En Hsu 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(6):2233-2251

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Effects of different exercise intensities with isoenergetic expenditures on C-reactive protein and blood lipid levels     

Tsao TH  Yang CB  Hsu CH 《Research quarterly for exercise and sport》2012,83(2):293-299

We investigated the effects of different exercise intensities on C-reactive protein (CRP), and whether changes in CRP levels correlated with blood lipid levels. Ten men exercised at 25%, 65%, and 85% of their maximum oxygen consumption rates. Participants' blood was analyzed for CRP and blood lipid levels before and after the exercise sessions. Although there was an intensity effect for postexercise high-density lipoprotein levels, there were no significant differences or correlations for postexercise CRP levels or between CRP and lipid levels across the three exercise intensities. In an acute aerobic bout model with isoenergetic expenditures, CRP was not affected by the exercise intensity. Additionally, changes in blood lipid levels might not have been connected to CIRP levels for physically fit participants.  相似文献   

An Analysis of Teacher Discourse that Introduces Real Science Activities to High School Students   总被引：1，自引：0，他引：1  

Pei-Ling Hsu  Wolff-Michael Roth 《Research in Science Education》2009,39(4):553-574

Most academic science educators encourage teachers to provide their students with access to more authentic science activities. What can and do teachers say to increase students’ interests in participating in opportunities to do real science? What are the discursive resources they draw on to introduce authentic science to students? The purpose of this ethnographic and discourse-analytic study is to investigate the ways in which the activities of scientists are discursively presented to high school students in a biology/career preparation course. Data sources were collected by means of observation, field notes, interviews, and videotaped lessons in an eleventh-grade biology/career preparation course. Drawing on discourse analysis, we investigate the discursive resources—or, more specifically and technically, the interpretative repertoires—teachers used to explain and promote opportunities to engage students in real science activities. Our analysis identifies and characterizes six types of interpretative repertoires: specialized, a-stereotypical, relevant, empirical, emotive, and rare-opportunity. To better understand the “big picture” of how these discursive resources are drawn on in the classroom, we also report on the frequencies of the repertoires in the discourse and the ways in which repertoires changed in the course of teacher-student interactions. The findings of this case study offer teachers and researchers with a better understanding of how specific forms of discourse—i.e., the repertoires—can serve as resources to enhance teacher-introduction of authentic science to students and provide students a bridge between school and authentic science.  相似文献   

Value of video-assisted thoracoscopic surgery in the diagnosis and treatment of pulmonary tuberculoma: 53 cases analysis and review of literature   总被引：1，自引：0，他引：1  

Kun-Yen Hsu  Hwa-Chan Lee  Chien-Chih Ou  Shi-ping Luh 《Journal of Zhejiang University. Science. B》2009,10(5):375-379

Tuberculoma of the lung is one of manifestations in tuberculosis and usually presents as a solitary pulmonary nodule (SPN). It is difficult to differentiate tuberculoma from SPN by other benign or malignant diseases. At present, the crucial role of video-assisted thoracoscopic surgery (VATS) in diagnosis and treatment of pulmonary diseases has been well acknowledged. Here, we reported 53 patients undergoing VATS resection for tuberculomas in our series. No postoperative mortality was found and only two patients experienced prolonged air-leakage (>7 d) and two had minor wound infections that were recovered after anti-tuberculosis or antibiotic treatment. Anti-tuberculosis chemotherapy from 6 to 12 months was routinely used postoperatively. We conclude that VATS is a satisfactory tool for the diagnosis and treatment of tuberculoma and can also establish a reliable diagnosis for all patients with SPNs.  相似文献   

Chest wall abscess due to Prevotella bivia     

Gwo-jong Hsu  Cheng-ren Chen  Mei-chu Lai  Shi-ping Luh 《Journal of Zhejiang University. Science. B》2009,10(3):233-236

Prevotella bivia is associated with pelvic inflammatory disease. A 77-year-old man developed a rapidly growing chest wall abscess due to P. bivia within days. He underwent surgical resection of the infected area; his postoperative course was uneventful. This is the first case of chest wall abscess due to P. bivia infection. Its correct diagnosis cannot be underestimated because fulminant infections can occur in aged or immunocompromised patients if treated incorrectly. Prompt, appropriate surgical management, and antibiotic therapy affect treatment outcome.   相似文献   

Effects of high-intensity interval training on canoeing performance     

Ming-Ta Yang  Mien-Mien Lee  Shu-Ching Hsu 《European Journal of Sport Science》2017,17(7):814-820

The purpose of this study was to compare the effects of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) utilizing a canoeing ergometer on endurance determinants, as well as aerobic and anaerobic performances among flat-water canoeists. Fourteen well-trained male flat-water canoeists were divided into an HIIT group or an MICT group. All subjects performed a continuous graded exercise test (GXT) and three fixed-distance (200, 500, and 1000?m) performance tests on a canoeing ergometer to determine canoeing economy, peak oxygen uptake (VO₂peak), and power at VO₂peak, and to calculate the critical velocity (CV) and anaerobic work capacity before and after the training programmes. The training programme involved training on a canoeing ergometer three times per week for four weeks. HIIT consisted of seven 2 min canoeing bouts at an intensity of 90% VO₂peak separated by 1 min of rest. The MICT group was trained at an intensity of 65% VO₂peak continuously for 20 min. After four weeks of training, performance in the 200-m distance test and the power at VO₂peak significantly improved in the HIIT group; performance in the 500?m and 1000?m distances and CV significantly improved in the MICT group. However, all variables were not significantly different between groups. It is concluded that HIIT for four weeks is an effective training strategy for improvement of short-distance canoeing performance. In contrast, MICT improves middle-distance canoeing performances and aerobic capacity.  相似文献   

Linguistic intergroup bias tells ingroup/outgroup orientation of bicultural Asian Americans     

Ling-Hui Hsu 《Int J Intercult Relat》2011,35(6):853-866

Traditional studies of ethnic relations focus on racialization between Whites and Blacks, or ethnic stratification between Whites and people of color. This study aims at broadening conventional studies of interethnic relations to examine racial attitudes among people who have internalized more than one culture – i.e., the biculturals and multiculturals. Social psychological research suggests that bicultural individuals are capable of switching between two cultural meaning frames depending on contextual demands. Bicultural individuals vary in how well they integrate the two cultural identities internalized in them – i.e., their bicultural identity integration levels (BII levels). Their BII levels lead to either culturally congruent or culturally incongruent behaviors among bicultural individuals. The underlying assumption of linguistic intergroup bias indicates that people tend to describe more abstractly observed positive ingroup behaviors and negative outgroup behaviors and describe more concretely observed negative ingroup behaviors and positive outgroup behaviors. In this study, bicultural Asian American participants are hypothesized to use language of either higher or lower abstraction to describe actions of positive and negative valence performed by either ethnic Asians or European Americans depending on the cultural priming they received and their BII levels. The demonstrated pattern of ingroup enhancement and outgroup derogation of the bicultural participants point out the perceived ingroup/outgroup orientation of these biculturals towards their coethnics and people of the mainstream culture. Effects of the cultural priming and impact of BII levels are also discussed.  相似文献