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71.
ABSTRACT

Although polo is a well-known equestrian sport, it is fundamentally misunderstood. The purpose of this study was to examine trunk and upper extremity kinematics and segmental velocities during the offside forehand polo swing between male and female athletes. Ten female and 17 male professional polo athletes volunteered. An electromagnetic tracking system collected kinematic data at 100 Hz while participants performed three offside forehand polo swings from a stationary wooden horse. One-way ANOVAs revealed statistically significant differences (p<0.05) in all kinematic variables and segmental velocities. Specifically, males exhibited a greater mean difference (MD=23°) of trunk flexion at take away (TA) and top of backswing (TOB)(MD=29°) trunk lateral flexion at ball contact (BC)(MD=23°), trunk rotation at TA(MD=97°) and TOB(MD=118°), shoulder abduction at TOB(MD=64°), and shoulder elevation at TOB(MD=13°) and BC(MD=40°). Females displayed greater trunk rotation at BC(MD=91°), shoulder elevation at TA(MD=19°), and elbow flexion at TA(MD=90°). Additionally, females generated greater segmental velocities early in the swing, while the males generated velocity later. The movement patterns observed amongst the males suggest energy is being transferred more efficiently along the kinetic chain, thus more efficient swing mechanics, but further investigation into the role of the trunk and lumbopelvic-hip complex in reference to the polo swing is warranted.  相似文献   
72.
In the UK, women remain under-represented in engineering and technology (E&T). Research has, therefore, investigated barriers and solutions to women's recruitment, retention and progression. Recruitment into the sector may be supported by exploring the career decisions of women and men who have chosen to study E&T. Triangulating quantitative and qualitative data from E&T students at a UK university, this paper examines the gendered nature of career choice narratives. It finds that women often maintain contradictory views; upholding gendered stereotypes about women's suitability for the so-called masculine work, yet also subscribing to ideals that the sector is accessible to all who wish to work in it. This is explained using an individualist framework in which women construct an autonomous sense of self, yet are also shaped by a gendered self. Women's discourse around career choice, therefore, reveals the problematic nature of gender norms for achieving gender equity in E&T.  相似文献   
73.
The purpose of our study is to investigate reform policy, specifically a proposed third grade reading retention policy within the Borderlands. Under this policy, students not performing proficiently on the third grade reading standardized exam will be automatically retained in the third grade. The research methods and approach used in this study include an equity analysis formed by combining two steps across a Borderland county in New Mexico. The first step is a regression analysis to answer if access to early childhood education and access to highly qualified teachers inform differences in third grade reading scores, and the second step uses a LatCrit informed Spatial Analysis to create an equity index, to see how equity varies across the spaces of elementary schools. This allows us to essentially map Third Grade Reading Retention Reform Policy in the Borderlands. The setting of the study is in the U.S. Southwest Borderlands, specifically Doña Ana County, which borders Texas and Mexico, in southern New Mexico. Up to a quarter of the population is under the age of 18, two thirds (66.6%) of the population is Latino, and half of the population speaks a language other than English at home. Implications from this study include, for policy makers, policy considerations that come from a non-deficit thinking perspective and focus on systemic considerations to improving educational equity. Given that the setting demographically mirrors much of the state of New Mexico, as well as demographic shifts across communities throughout the U.S., this study provides further considerations for key systemic changes to improving academic measures like reading scores.  相似文献   
74.
Sleep frequently intersects with media technologies in routinized yet unpredictable ways. This article proposes a concept of “drowsing” to describe how sleepiness occurs and persists across aspects of banal media life. Focusing on nighttime tablet use and blue light engagement, we argue that sleep requires a multidimensional and embodied account of how cultural practices, biological rhythms, and incidental occurrences interact. Ultimately, focusing on sleep suggests the contradictory roles that technologies play within the duration of everyday life—both providing a sense of calmness and deceleration, even as they accelerate life or contribute to long-term bodily harm.  相似文献   
75.
Food spoilage has an enormous economic impact, and microbial food spoilage plays a significant role in food waste and loss; subsequently, an equally significant portion of undergraduate food microbiology instruction should be dedicated to spoilage microbiology. Here, we describe a set of undergraduate microbiology laboratory exercises that focus specifically on food spoilage which were taught in 2 lab periods as part of the undergraduate food microbiology lab curriculum at Cornell University. The lab was broken down into 3 exercises. Two exercises lead students to determine the likely source of contamination in a canned salsa through (exercise 1a) plating and observation of colony morphology and (exercise 1b) determination of the thermal resistance for those isolates. The final exercise (2) involved detection of the spoilage bacterium Alicyclobacillus in apple juice. Spoiled juice demonstrations were also prepared in this exercise for students to observe sensorial changes resulting from spoilage, emphasizing that spoilage is not always visually detectable. Students were able to successfully determine the source of contamination based on the results of their laboratory findings, which they used to make recommendations for production to reduce microbial food spoilage in the canned salsa product. Based on student answers to discussion questions provided following lab exercises, participants were able to (a) identify the significance of microbial spoilage and how spoilage is principally different from food safety, (b) describe varying sensorial changes associated with microbial spoilage, and (c) employ methods and analysis to evaluate sources and type of contamination. Downloadable handouts and stepwise instructions are available as supporting information.  相似文献   
76.
The opportunities for outreach activities for professionals and academics in food science are extensive, as too are the range of participants’ experience levels and platforms for delivery. Here, we present a set of activities that are readily adaptable for a range of students (ages 10 to 18) in multiple platforms (demonstration table and hands‐on workshop). Our activity, collectively called “The Science of a Sundae,” has three units, one for each of the three parts of a sundae: the caramel sauce, the cherry, and the ice cream. In each unit we use these familiar food items to illustrate how colligative properties (or, simply, “solutions” for younger students) impact the chemical, microbiological, and sensorial properties of food. We have used these activities to present to over 1000 students and their parents/chaperones. Grade levels of student participants have ranged from 5th grade through high school, and these activities have been presented in the form of a demonstration table at science events as well as a set of three 45‐minute workshops in a classroom setting. Educational impact of these activities was evaluated with 7th grade students (n = 77) who participated in the 3‐phase workshop. On average, students who took the posttest (after participation in the workshop) scored 36% higher than students who took the pretest (prior to participation in the workshop). These results and instructor observations suggest the merit of this lesson and its adaptability among ages and platforms.  相似文献   
77.
SYNOPSIS

Objective . This study examined the bidirectional relations between effective parenting practices and externalizing problems in children in homeless families. Design . The sample comprised 223 children (M = 8.12 years) in 137 families living in temporary supportive housing, who participated in the Early Risers conduct problems prevention program lasting 2 years. Video-recorded observations of parent-child interactions were collected and rated by trained observers to assess effective parenting practices. Child externalizing problems were reported by their school teachers. Both variables were assessed at baseline prior to intervention and at 1- and 2-year post-baseline. Results . Child externalizing problems at baseline were negatively associated with effective parenting from baseline to year 1 as well as from year 1 to year 2. Observed effective parenting practices at year 1 were negatively associated with child externalizing problems from year 1 to year 2. Conclusions . These findings underscore the presence of bidirectional influence processes between parents and children in high-risk families. Implications for intervention programs for high-risk families are discussed.  相似文献   
78.
Background and purpose: Attentional focus cues have been shown to impact motor performance of adults and children. Specifically, an external focus of attention results in improved motor learning and performance as compared to adopting an internal focus of attention. The purpose of this study was to determine the effects of an internal and external attentional focus cue on children’s object control skill performance during a commonly used motor skill assessment.

Methods: Using a within-participant design, a total of 44 children (Mage?=?7.7 years, 20 boys and 24 girls) completed all three attentional focus conditions. The object control subscale of the Test of Gross Motor Development-2nd Edition (TGMD-2; Ulrich, 2000. Test of Gross Motor Development-2. Austin: Pro-Ed.) served as the motor skill assessment in present study. The TGMD-2 is a normed and criteria-referenced assessment frequently used to assess fundamental motor skill competence in children. The object control subtest of the TGMD-2 assesses a child’s ability to complete six fundamental motor skills – striking a stationary ball, stationary dribble, catch, kick, overhand throw, and underhand roll. All participants completed the object control subtest of the TGMD-2 under three different attentional focus conditions: baseline (i.e. neutral focus), internal, and external. The internal cue focused on movement performance and the external cue focused on movement outcome. In all three conditions, a video demonstration of proper skill performance was used to ensure no difference in visual demonstration, but the overlaying audio was changed to encompass each attentional focus condition. Children’s motor performance was recorded and later coded by a single researcher blinded to the study. A repeated-measures analysis of variance was used to determine if children’s motor scores changed among the three conditions.

Results: Findings demonstrated that children’s performance differed among the three conditions (F(2,43)?=?3.5, p?Post hoc analysis revealed that children scored significantly better in the external cue condition compared to the baseline (difference?=?1.98, p?Conclusion: Children performed better when given a verbal instruction to focus their attention externally rather than a verbal instruction with no attentional focus cue. No significant differences exist between the internal and external focus condition or between the neutral and internal condition. Our findings align with the literature and support that external attentional focus cues have a positive effect on motor performance. From a teaching and learning standpoint, using consistent instructions appears to be essential for young learners. Slight changes in verbal cues can have a significant effect on how well children execute fundamental motor skills.  相似文献   
79.
Marginalised students in education are often formally excluded and further disadvantaged by school disciplinary approaches. This leads to school behaviour codes not being followed by students. This result is often linked to individualised student disciplinary responses. Further, formal student exclusion from schools remains a controversial international practice driven by eclectic government policy. Yet there is limited research on student perspectives within debates on the value of interventions designed to reduce fixed‐term exclusion and promote children's participation in education. This study, by Gwen Gilmore of the College of Education at Victoria University, Melbourne, presents the perspectives of five Year 8 and 9 students who participated in a disciplinary inclusion room designed to reduce fixed‐term exclusion in a secondary school located in England. The research methodology is framed by a cultural historical activity theory approach, and mixed methods reported include document analysis and student interviews. Students stated that the disciplinary inclusion room enabled them to continue their learning and that this discipline model complemented the processes of education. These students' perspectives challenge recent narratives on disciplinary provision and provide possibilities for schools to consider how discipline can be organised towards practices that are more inclusionary and potentially educative.  相似文献   
80.
Reviews     
During the past year he was a Bradley Fellow at the Heritage Foundation in Washington, D. C.  相似文献   
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