Trends in SEN identification: contexts,causes and consequences     

Jo Hutchinson  Sami Timimi  Neil McKay 《Journal of Research in Special Educational Needs》2021,21(1):19-38

  相似文献   

Humanitas Emptor: Reconsidering Recent Trends and Policy in Science Teacher Education     

Dana L. Zeidler  Benjamin C. Herman  Michael P. Clough  Joanne K. Olson  Sami Kahn  Mark Newton 《Journal of Science Teacher Education》2016,27(5):465-476

  相似文献   

Construction of periodic and solitary wave solutions for the complex nonlinear evolution equations     

Adem C. Cevikel  Ahmet Bekir  Sait San  Mustafa B. Gucen 《Journal of The Franklin Institute》2014

In this paper, we present a functional variable method for finding periodic wave and solitary wave solutions of complex nonlinear evolution equations in mathematical physics and engineering sciences. The proposed technique is tested on the generalized Zakharov equation and higher-order nonlinear Schrödinger equations. The method is straightforward and concise, and it can also be applied to other nonlinear evolution equations in applied mathematics.  相似文献   

Adequacy, efficiency and equity of higher education financing: The case of Egypt     

Yasmine Fahim  Noha Sami 《Prospects》2011,41(1):47-67

To meet its future challenges in financing higher education, Egypt has no option but to search for alternative funding arrangements. This article considers the question of how to do so, keeping in mind the need to ensure equitable access to good quality education for those who cannot afford it. To this end, the article begins by assessing public expenditure on higher education in Egypt, with respect to its adequacy, efficiency, and equity. Next, it analyzes the impacts that demographic changes, the demand for quality education, and the transition to private provision of education will have on the nature of financing higher education in the future. It concludes by suggesting alternative strategies to address the problem of financing higher education in Egypt.  相似文献   

Turkish elementary student teachers’ epistemological beliefs and moral reasoning     

Mustafa Sami Topcu 《欧洲师范教育杂志》2011,34(1):99-125

The purpose of the present study was to explore the relationships among Turkish elementary student teachers’ epistemological beliefs and moral reasoning, and to determine which types of epistemological beliefs elementary student teachers exhibit. The findings of the present study demonstrated that epistemological beliefs did not make a unique contribution to moral reasoning and student teachers’ epistemological beliefs developed as more or less independent beliefs. The factor analyses results suggest that multidimensional theory is more appropriate than unidimensional theory in explaining student teachers’ epistemological beliefs.  相似文献   

Digital Technology Usage of Young Children: Screen Time and Families     

Konca  Ahmet Sami 《Early Childhood Education Journal》2022,50(7):1097-1108

Early Childhood Education Journal - This study aimed to explore the digital environments of 3–6-year-old children within the home setting. A total of 537 children aged...  相似文献   

Validation of the Delone and McLean information systems success model: a study on student information system     

&#;elik  Kamil  Ayaz  Ahmet 《Education and Information Technologies》2022,27(4):4709-4727

Education and Information Technologies - This study aims to evaluate the success of the Student Information System (SIS) using the updated Information System Success Model (IS success model)...  相似文献   

Effects of muscle-tendon length on joint moment and power during sprint starts   总被引：3，自引：2，他引：1  

Mero A  Kuitunen S  Harland M  Kyröläinen H  Komi PV 《Journal of sports sciences》2006,24(2):165-173

The aim of this study was to examine the effects of muscle-tendon length on joint moment and power during maximal sprint starts. Nine male sprinters performed maximal sprint starts from the blocks that were adjusted either to 40 degrees or 65 degrees to the horizontal. Ground reaction forces were recorded at 833 Hz using a force platform and kinematic data were recorded at 200 Hz with a film camera. Joint moments and powers were analysed using kinematic and kinetic data. Muscle - tendon lengths of the medial gastrocnemius, soleus, vastus medialis, rectus femoris and biceps femoris were calculated from the set position to the end of the first single leg contact. The results indicated that block velocity (the horizontal velocity of centre of mass at the end of the block phase) was greater (P < 0.01) in the 40 degrees than in the 65 degrees block angle condition (3.39 +/- 0.23 vs. 3.30 +/- 0.21 m . s(-1)). Similarly, the initial lengths of the gastrocnemius and soleus of the front leg in the block at the beginning of force production until half way through the block phase were longer (P < 0.001) in the 40 degrees than in the 65 degrees block angle condition. The initial length and the length in the middle of the block phase were also longer in the 40 degrees than in the 65 degrees block angle condition both for both the gastrocnemius (P < 0.01) and soleus (P < 0.01-0.05) of the rear leg. In contrast, the initial lengths of the rectus femoris and vastus medialis of the front leg were longer (P < 0.05) in the 65 degrees than in the 40 degrees block angle condition. All differences gradually disappeared during the later block phase. The peak ankle joint moment (P < 0.01) and power (P < 0.05) during the block phase were greater in the 40 degrees than in the 65 degrees block angle condition for the rear leg. The peak ankle joint moment during the block phase was greater (P < 0.05) in the 40 degrees block angle for the front leg, whereas the peak knee joint moment of the rear leg was greater (P < 0.01) in the 65 degrees block angle condition. The results suggest that the longer initial muscle-tendon lengths of the gastrocnemius and soleus in the block phase at the beginning of force production contribute to the greater peak ankle joint moment and power and consequently the greater block velocity during the sprint start.  相似文献   

Stability studies of common biochemical analytes in serum separator tubes with or without gel barrier subjected to various storage conditions     

Cuhadar S  Atay A  Koseoglu M  Dirican A  Hur A 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2012,22(2):202-214

Introduction

The collected and shipped blood samples are exposed to a various extra-analytical factors prior to analysis. The aim of the study was to determine the stability of analytes in serum gel tubes and plain tubes exposed to a range of storage temperatures and times after centrifugation.

Materials and methods:

Fifteen healthy volunteers were recruited and venous blood was collected into four tubes, two with and two without gel separator. Analyzing the baseline samples in 30 min, all were stored at 4ºC or 24ºC for 6, 12, 18, 24, 30, 36, 48 and 72 hours and 1 week. Sixteen biochemical anaytes were measured on each sample. Variations remained under the desirable bias considered as clinically insignificant.

Results:

On day three, most analytes remained stable including albumin, protein, creatinine, cholesterol, triglycerides, gamma-glutamyl transferase (GGT), alkaline phosphatase (ALP), alanine aminotransferase (ALT), creatine kinase (CK), lactate dehydrogenase (LD) regardless of tube types. Glucose concentration decreased markedly (P = 0.001) beginning from the first hours of storage in plain serum. The stability maximized for the analytes including glucose, total bilirubin, urea nitrogen (BUN), uric acid stored at 4 ºC in gel tubes. Aspartate aminotransferase (AST) activity increased significantly (P = 0.002) up to 48-h, however bias was not significant clinically. High density lipoprotein (HDL) concentration was stable in gel tubes at 24 ºC, in plain tubes at 4 ºC stored up to 36-h.

Conclusion:

Serum gel or non-gel tubes might be used interchangeably for 11 analytes chilled or at 24 ºC, whereas some restrictions must be applied for glucose, AST, BUN, HDL, and uric acid.  相似文献   

Microfluidic impedance spectroscopy as a tool for quantitative biology and biotechnology     

Ahmet C. Sabuncu  Jie Zhuang  Juergen F. Kolb  Ali Beskok 《Biomicrofluidics》2012,6(3)

A microfluidic device that is able to perform dielectric spectroscopy is developed. The device consists of a measurement chamber that is 250 μm thick and 750 μm in radius. Around 1000 cells fit inside the chamber assuming average quantities for cell radius and volume fraction. This number is about 1000 folds lower than the capacity of conventional fixtures. A T-cell leukemia cell line Jurkat is tested using the microfluidic device. Measurements of deionized water and salt solutions are utilized to determine parasitic effects and geometric capacitance of the device. Physical models, including Maxwell-Wagner mixture and double shell models, are used to derive quantities for sub-cellular units. Clausius-Mossotti factor of Jurkat cells is extracted from the impedance spectrum. Effects of cellular heterogeneity are discussed and parameterized. Jurkat cells are also tested with a time domain reflectometry system for verification of the microfluidic device. Results indicate good agreement of values obtained with both techniques. The device can be used as a unique cell diagnostic tool to yield information on sub-cellular units.  相似文献