Two classes of community college students having less than the usual minimal preparation required for admission were taught half of a basic science course using individualized instruction and half using traditional instruction. The course was divided into chemistry and physics segments and random halves of each class received the individualized treatment in one segment and the traditional treatment in the other. The individualized treatment was found to yield superior achievement gains and more positive attitudes toward science than the traditional treatment while both resulted in equivalent student satisfaction. No differences between segments were obtained. Of the four treatment-segment combinations, individualized physics appeared to yield the greatest achievement. Individualized instruction was concluded to be effective. 相似文献
This study employs content analysis to examine how the New York Times and St. Louis Post-Dispatch framed “Black Lives Matter” protests in the aftermath of the shooting of unarmed black teenager Michael Brown. The researchers examine all New York Times and St. Louis Post-Dispatch articles dealing centrally with the Michel Brown protests during three separate time periods corresponding to heavy protest activity. The coding scheme measured dominant frame direction, article length, sourcing, and mention of protester crimes. Contrary to expectations, the papers provided overwhelmingly sympathetic coverage of “Black Lives Matter” protests. In describing the protests, both newspapers were much more likely to employ a “positive” frame suggesting peacefulness and order than a “negative” frame suggesting lawlessness and deviance. Neither newspaper over-emphasized protester-perpetrated crimes, with both papers making relatively infrequent mention of looting, arson, assault, and gunfire, respectively. Importantly, both newspapers directly quoted protesters much more often than they quoted police officers and other government officials. 相似文献
ABSTRACTWith widespread media coverage of religious ‘extremism’, there is a great deal of interest in how religious identities and principles of tolerance – or intolerance – are learned and manifested. The current study investigates the extent to which high school Islamic Education textbooks reflect Islamic religious tolerance, and how this topic presented. A content analysis for religious-tolerance topics was conducted in the Islamic Education textbooks in Kuwaiti high schools; the results show that tolerance is mentioned much more often than intolerance, but there is still room for improvement. 相似文献
Mulberry longicorn beetle, Apriona germari, has been reported to produce two endo-β-1,4-glucanases or AgEGases (accession Nos. Q6SS52 and Q5XQD1). AgEGase sequence contains catalytic motif (amino acid residues 37~48), which is the characteristic of family Glycohydrolase 45 and is identified as the substrate binding site. The application of bioinformatics ap-proaches includes sequence analysis, structural modeling and inhibitor docking to relate the structure and function of AgEGases. We have dissected the sequence and structure of AgEGase catalytic motif and compared it with crystal structure of Humicola insolens endoglucanases V. The results show an involvement of sulfur containing amino acid residues in the active site of the enzyme. Cys residues and position of disulfide bonds are highly conserved between the two structures of endoglucanases of A. germari. Surface calculation of AgEGase structure in the absence of Cys residues reveals greater accessibility of the catalytic site to the substrate involving Asp42, a highly conserved residue. For the inhibition study, tannin-based structure was docked into the catalytic site of AgEGase using ArgusLab 4.0 and it resulted in a stable complex formation. It is suggested that the inhibition could occur through formation of a stable transition state analog-enzyme complex with the tannin-based inhibitor, as observed with other insect cellulases in our laboratory. 相似文献
Excess glucocorticoids exert feedback suppression on hypothalamus and pituitary, Thereby the release of CRH and ACTH are suppressed
which results in bilateral adrenal cortical atrophy, at the same time patients is having features of latrogenic Cushing syndrome.
The interesting part of this case is excess glucocorticoids have exerted cross feedback suppression on hypothalamus and pituitary
resulting in suppression of release of GHRH, GH and LHRH, LH and FSH also from hypothalamus and pituitary thereby resulting
in growth retardation as well as hypogonadotrophic hypogonadism. Combination of feedback and cross feedback effect of excess
glucocorticoids are seen in one patient which is an interesting part of the case. 相似文献
Up to one-third of Americans who take foreign assignments are unsuccessful, largely because of either the lack of experience in, or training for, intercultural living or working. This lack of success is indeed problematic at a time when American businesses must seek global markets. The poor success rate has precipitated increased interest in cross-cultural training. Much of the reported cross-cultural training is experiential, however, and is therefore limited in transferability to other situations. The experiential base often provides no analytical structure for developing training programs for other situations. This article reviews both research and experiential literature and presents a three-axis matrix as an analytical base for developing cross-cultural training. The axes systematically focus attention on differences in culture, function (task roles), and situations. 相似文献
This study examined the associations between pre-game wellness and changes in match running performance normalised to either (i) playing time, (ii) post-match RPE or (iii) both playing time and post-match RPE, over the course of a field hockey tournament. Twelve male hockey players were equipped with global positioning system (GPS) units while competing in an international tournament (six matches over 9 days). The following GPS-derived variables, total distance (TD), low-intensity activity (LIA; <15?km/h), high-intensity running (HIR; >15?km/h), high-intensity accelerations (HIACC; >2?m/s2) and decelerations (HIDEC; >?2?m/s2) were acquired and normalised to either (i) playing time, (ii) post-match RPE or (iii) both playing time and post-match RPE. Each morning, players completed ratings on a 0–10 scale for four variables: fatigue, muscle soreness, mood state and sleep quality, with cumulative scores determined as wellness. Associations between match performances and wellness were analysed using Pearson’s correlation coefficient. Combined time and RPE normalisation demonstrated the largest associations with Δwellness compared with time or RPE alone for most variables; TD (r?=??0.95; ?1.00 to ?0.82, p?=?.004), HIR (r?=??0.95; ?1.00 to ?0.83, p?=?.003), LIA (r?=??0.94; ?1.00 to ?0.81, p?=?.026), HIACC (r?=??0.87; ?1.00 to ?0.66, p?=?.004) and HIDEC (r?=??0.90; ?0.99 to ?0.74, p?=?.008). These findings support the use of wellness measures as a pre-match tool to assist with managing internal load over the course of a field hockey tournament.Highlights
Fixtures during international field hockey tournaments are typically congested and impose high physiological demands on an athlete. To minimise decrements in running performance over the course of a tournament, measures to identify players who have sustained high internal loads are logically warranted.
The present study examined the association between changes in simple customised psychometric wellness measures, on changes in match running performance normalised to (i) playing time, (ii) post-match RPE and (iii) playing time and post-match RPE, over the course of a field hockey tournament.
Changes in match running performance were better associated to changes in wellness (r = ?0.87 to ?0.95), when running performances were normalised to both time and RPE compared with time or RPE alone.
The present findings support the use of wellness measures as a pre-match tool to assist with managing internal load over the course of a field hockey tournament. Improved associations between wellness scores and match running performances were evident, when running variables were normalised to both playing time and post-match RPE.