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21.
Sarah Lindstrom Johnson Ray E. Reichenberg Kathan Shukla Tracy E. Waasdorp Catherine P. Bradshaw 《Educational Measurement》2019,38(4):99-107
The U.S. government has become increasingly focused on school climate, as recently evidenced by its inclusion as an accountability indicator in the Every Student Succeeds Act. Yet, there remains considerable variability in both conceptualizing and measuring school climate. To better inform the research and practice related to school climate and its measurement, we leveraged item response theory (IRT), a commonly used psychometric approach for the design of achievement assessments, to create a parsimonious measure of school climate that operates across varying individual characteristics. Students (n = 69,513) in 111 secondary schools completed a school climate assessment focused on three domains of climate (i.e., safety, engagement, and environment), as defined by the U.S. Department of Education. Item and test characteristics were estimated using the mirt package in R using unidimensional IRT. Analyses revealed measurement difficulties that resulted in a greater ability to assess less favorable perspectives on school climate. Differential item functioning analyses indicated measurement differences based on student academic success. These findings support the development of a broad measure of school climate but also highlight the importance of work to ensure precision in measuring school climate, particularly when considering use as an accountability measure. 相似文献
22.
Abbas Ali Mahdi Anu Chandra Raj Kumar Singh Sanjeev Shukla L. C. Mishra Sohail Ahmad 《Indian journal of clinical biochemistry : IJCB》2003,18(2):8-15
In the present study the antioxidative potential ofMomordica charantia, Azadirachta indica, Allium sativum andOcimum sanctum was assessed in streptozotocin induced diabetic rats. Lipid peroxide levels were also measured in normal, diabetic and treated
animals. Malondialdehyde (MDA) levels were significantly higher and antioxidant activity was found low in diabetic groups
as compared to the control groups, and significant alteration in both the MDA levels and antioxidant activity was also observed
when the above herbal hypoglycemic agents were given to diabetic rats. On the basis of our results we conclude thatM. charantia, A. indica, A. sativum andO. sanctum are not only useful in controlling the lipid peroxide levels but are also helpful in further strengthening the antioxidant
potential. 相似文献
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24.
Burnout is a concept which was born in the mid 1970’s in the USA and with astonishing rapidity has become a catch-word to
convey an almost unlimited variety of social and personal problems afflicting workers. It describes a specific dysfunction
among helping professionals, believed to be the result of excessive demands made upon their energy, strength and resources.
Although a clearly agreed upon definition does not exist, burnout is characterized by the inability to be sufficiently concerned
about and involved with service recipients. A burnt out worker tends to withdraw emotionally from the demands of the job.
Burnout is reflected in emotional exhaustion and apathy, physical fatigue, lack of energy, psychosomatic illness, increased
alcohol and drug consumption, cynicism, inappropriate anger, depression and lack of personal achievements. Now, it is observed
that teachers are also showing symptoms of burnout, which directly or indirectly affect their teaching performance. Motivated
by these reasons the investigators decided to investigate the status of burnout among secondary school teachers and assess
its extent in Indian teachers. 相似文献
25.
Santosh K. Shukla Suman B. Sharma Usha R. singh 《Indian journal of clinical biochemistry : IJCB》2015,30(1):27-34
Sustained high levels of circulating catecholamines are reported to induce cardiotoxicity. Isoproterenol (ISP), a synthetic catecholamine has been widely employed to induce myocardial injury, though the role of inflammation and apoptosis is not well established. This study was designed to investigate the underlying mechanism of oxidative damage, inflammatory signaling, cell death in ISP induced myocardial infarction in rats. Wistar albino rats were divided in two groups: group I (sham control) and group II (ischemic control). ISP (85 mg/kg, s.c.) was administered at an interval of 24 h to group II for two consecutive days. On day third, after 48 h of the first injection of ISP, blood was collected from retro orbital plexus of rat eyes to estimate the biochemical parameters. Glutathione (GSH) and superoxide dismutase (SOD) were measured for antioxidant status. Similarly, malondialdehyde (MDA) was measured as an index of lipid peroxidation. Cardiac markers (SGOT, CK-MB, TropI and LDH) and pro-inflammatory cytokines (IL-6, CRP and TNF-α) were also estimated in ISP-induced rats. At the end of experiments animals were sacrificed for histopathological studies. GSH and SOD showed significant decrease after ISP challenge as compared to sham (control) group (p < 0.01) while MDA level, increased significantly (p < 0.01). ISP, also increased the level of cardiac markers and markers of inflammation significantly (p < 0.01), which was further verified by histopathological studies of the heart tissues. The study confirmed that ISP causes detrimental changes in the myocardium by altering cardiac and inflammatory markers, which leads to severe necrosis. The deleterious effects produced by ISP substantiate its suitability as a novel animal model for evaluation of cardioprotective agents/drugs. 相似文献
26.
R. S. Kanwar D. C. Merwaha R. R. Gupta P. S. Shukla S. S. Minhas S. Negi 《Indian journal of clinical biochemistry : IJCB》1996,11(2):173-175
Cholesterol and phospholipids were estimated in serum and bile from hepatic duct and gallbladder of twenty five patients of gallstone with functioning gallbladder (Group-I) and an equal number of patients having diseases other than of hepatobiliary system acting as control (Group-II). Group-I patients showed high serum cholesterol and low serum phospholipid levels as compared to those of Group-II. Cholesterol levels in hepatic duct and gallbladder bile were higher in Group-I than in Group-II whereas the phospholipid levels in the bile of Group-I were lower than in Group-II. The phospholipid: cholesterol ratios in hepatic duct and gallbladder bile of Group-I were 2.76 and 3.03 respectively as compared to 5.62 and 5.92 in Group-II. 相似文献
27.
Vygotsky (in: Rieber, Carton (eds) The collected works of L.S. Vygotsky, vol 1, Pleneum Press, Newyork, pp 167–241, Retrieved from http://images.lib.monash.edu.au/edf5411/04118997.pdf, 1987) stated that academic or scientific concepts require a level of conscious awareness on the part of the child within everyday situations. Academic concepts can be any kind of concept, such as science concepts, mathematics concepts, language concepts and so on. Vygotsky theorised how these academic concepts could be developed by school aged children, but he said less about the prior to school period. Scientific concepts do not instantly develop in their final form but rather follow a process of conceptual development guided through adult–child interaction. It is understood that not any kind of social interactions can be considered developmental, but rather it is interaction which is purposeful and which is viewed as useful for a child’s development. Any kind of conceptual development requires the interaction with the ideal form as presented through adult interaction in social contexts. In any stage of development, ideal forms need to be present in the real context. Ideal in the sense that it acts as a model for that which should be achieved at the end of the developmental period; and in contrast, the real form represents the beginning point of child development (Vygotsky, in: Veer, Valsiner (eds) The Vygotsky reader, Blackwell Publishers, Oxford, pp 338–350, 1994). Many studies have documented the interactions between adults and children for developing scientific concepts in formal settings but little is understood about what happens in family homes for the prior to school age period. We do not know how scientific concepts develop during infants–toddlers everyday life at home. What kinds of social interactions in everyday family life support infants and toddlers to develop early forms of science concepts? This paper presents the findings of a study of infant and toddler learning of science at home. A total of around 30 h of video data were collected from three Bangladeshi families in Australia and Singapore. Three children aged from 10 to 36 months were filmed over 1 year in their everyday context. Informed by cultural-historical theory, the findings indicate that a form of conscious collaboration between parents and infants–toddlers is the key for developing small science concepts from rudimentary to final form. Small science has been defined as simple scientific narration of the everyday moments that infants and toddlers experience at home with their families. It was found that it was the families who filled the gap in understanding, through actively supporting the development of their infant–toddler’s higher mental function. Here the relations between infant–toddler real forms of development were carefully considered by the parents in relation to the ideal form that they created through collective dialogue of small science moments in the environment. If infants–toddlers learn these small concepts in their everyday settings, it is probable that they could link these early forms of understandings to learning abstract concepts later in school. This study contributes to understanding the nature of social interaction patterns for developing small science concepts in the everyday context of family life. This paper also provides pedagogical suggestions for early childhood science education. 相似文献
28.
ABSTRACT This research project examines experiences at the University of Winnipeg in facilitating land-based pedagogical (LBP) courses to ascertain the potential of land-based learning in strengthening students’ connection with Indigenous ways of knowing in Manitoba. The overarching aim of the research was to create empirical support for building bridges among the pedagogical approaches of land-based learning, two-eyed seeing, and transformative learning as a strategy for promoting transformative third space through land-based education programs. Transformative third space is utilized to conceptualize the process of weaving together Indigenous knowledges and academic knowledge to encourage intercultural dialogue and perceptual shifts in students’ understanding of Indigenous ways of knowing. 相似文献
29.
Pushpa Durgawale Sangita Patil P. S. Shukla Ajit Sontakke Satish Kakade Sunil Yadav 《Indian journal of clinical biochemistry : IJCB》2009,24(1):30-35
Fasting samples of 914 subjects from healthy population were analyzed for total cholesterol, triglyceride and three major
fractions of lipoproteins i.e. high-density lipoprotein cholesterol, low lipoprotein cholesterol and very low-density lipoprotein
cholesterol. The values obtained were (in mg/dl) 165.7±30.2,88.36±31.2, 44.86±10.68, 101.66±29.8 and 18.11±7.35 respectively.
When these subjects were grouped according to the age and sex, no appropriate differences were observed between most of the
groups. Triglycerides were found to be low and HDL cholesterol was high in female when compared with male of similar age.
Beyond age 40 years cholesterol level and low density lipoprotein cholesterol was found to be gradually increased in case
of women. Minor difference was observed with dietary pattern. Present study suggests that clinical evaluation of patient should
be made on the basis of these reference values for Western Maharashtra population. 相似文献
30.
There has been increasing interest on the role of private foundations in education finance and delivery. We argue that this is due to a macro-policy context of stagnating levels of official development assistance for education and an uncritical acceptance of a logic of neutrality and the efficiency and effectiveness of of partnerships and philanthropy. This paper reports on the results of a literature review on private foundations in education and development. It found significant contestation against the claims of neutrality, efficiency, effectiveness. It also identifies salient methodological and substantive issues for the development of a research agenda on the issue. 相似文献