Laplace Transforms Without Integration     

Robert L. Robertson 《PRIMUS》2017,27(6):606-617

Calculating Laplace transforms from the definition often requires tedious integrations. This paper provides an integration-free technique for calculating Laplace transforms of many familiar functions. It also shows how the technique can be applied to probability theory.  相似文献   

Exploring the use of the ICT in supporting dyslexic students’ preferred learning styles : A preliminary evaluation     

FatimaEzzahra Benmarrakchi  Jamal El Kafi  Ali Elhore  Sara Haie 《Education and Information Technologies》2017,22(6):2939-2957

Dyslexia is one of the most common learning disabilities. It is described as a disorder manifested by difficulty in learning to read despite conventional instruction, adequate intelligence, and sociocultural opportunity. It affects relatively about 7–10 % of the population across most languages and cultures. In this study, we explore the potential benefits offered by the use of Information and Communication Technology (ICT) to support dyslexic students by considering their preferred learning styles. In the current paper we administered the VAK and Honey & Mumford questionnaires to 28 Arabic students with ages between 8 and 10 years old. 8 students from dyslexic group and 20 students from control group were selected to assess and compare their preferred learning style. The implemented system focuses on dyslexia in Arabic language, especially in Arabic countries such as Morocco. Based on the results of the analysis of learning styles differences, we introduced an adaptive mobile learning to support and promote learning for dyslexic students. The aim of the study is to consider the relationship between dyslexia and learning style and to suggest a different learning way. Preliminary results show that the ICT has a valuable role in providing opportunities for learners with dyslexia to participate more fully in education.  相似文献   

Contexts of reading instruction: Implications for literacy skills and kindergarteners’ behavioral engagement     

Claire Cameron Ponitz  Sara E. Rimm-Kaufman 《Early childhood research quarterly》2011,26(2):157

This observational study examined kindergarteners’ (n = 170) exposure to literacy instruction in their classrooms (n = 36), child-by-instruction interactions, and behavioral engagement in relation to literacy skills. Time spent in four instructional contexts was coded according to who managed children's attention (teacher-managed, TM or child-managed, CM), and the content focus (basic skills such as teaching letters and their sounds, or meaning-focused such as discussing a book); children's behavioral engagement and off-task behavior were also coded live five times over the year. Word-reading and phonological awareness skills were assessed in fall and spring. Hierarchical Linear Modeling results indicated that kindergarteners with lower initial skills gained more in word-reading, but not phonological awareness, when they were exposed to relatively more time in TM basic skills instruction. In contrast, more time in CM meaning-focused instruction did not interact with initial skills to predict either outcome. Engagement analyses indicated that students were more likely to be off-task in CM than in TM contexts. Children who spent more time off-task during TM contexts had lower spring scores on both outcomes. Discussion explores the implications of this work for both literacy learning and behavioral engagement in the transition year of kindergarten.  相似文献   

Developmental change in the ERP responses to familiar faces in toddlers with autism spectrum disorders versus typical development     

Webb SJ  Jones EJ  Merkle K  Venema K  Greenson J  Murias M  Dawson G 《Child development》2011,82(6):1868-1886

Individuals with autism spectrum disorder (ASD) show differences in face processing abilities from early in development. To examine whether these differences reflect an atypical versus delayed developmental trajectory, neural responses to familiar and unfamiliar faces in twenty-four 18- to 47-month-old children with ASD were compared with responses of thirty-two 12- to 30-month-old typically developing children. Results of 2 experiments revealed that neural responses to faces in children with ASD resembled those observed in younger typically developing children, suggesting delayed development. Electrophysiological responses to faces were also related to parent report of adaptive social behaviors for both children with ASD and typical development. Slower development of the face processing system in ASD may be related to reduced self-directed "expected" experience with faces in early development.  相似文献   

Psychometric characteristics of the Persian version of the Multidimensional School Anger Inventory–Revised     

Vahid Aryadoust  Sanaz Akbarzadeh  Sara Akbarzedeh 《Asia Pacific Journal of Education》2011,31(1):51-64

The Multidimensional School Anger Inventory–Revised (MSAI-R) is a measurement tool to evaluate high school students' anger. Its psychometric features have been tested in the USA, Australia, Japan, Guatemala, and Italy. This study investigates the factor structure and psychometric quality of the Persian version of the MSAI-R using data from an administration of the inventory to 585 Iranian high school students. The study adopted the four-factor underlying structure of high school student anger derived through factor analysis in previous validation studies, which consists of: School Hostility, Anger Experience, Positive Coping, and Destructive Expressions. Confirmatory factor analysis of this four-factor model indicated that it fit the data better than a one-factor baseline model, although the fit was not perfect. The Rasch model showed a very high internal consistency among items, with no item misfitting; however, our results suggest that to represent the construct sufficiently some items should be added to Positive Coping and Destructive Expression. This finding is in agreement with Boman, Curtis, Furlong, and Smith's Rasch analysis of the MSAI-R with an Australian sample. Overall, the results from this study support the psychometric features of the Persian MSAI-R. However, results from some test items also point to the dangers inherent in adapting the same test stimuli to widely divergent cultures.  相似文献   

What About the Hyperlocals?     

Sara Leckner  Carina Tenor  Gunnar Nygren 《Journalism Practice》2019,13(1):68-89

Using a survey of a sample of hyperlocal actors in Sweden (N?=?178), this article examines preconditions, motivations and sustainability for hyperlocal media operations, outside the traditional media chains, in order to provide a picture of their function in the current media landscape, and to further build on the understanding of the hyperlocal business model. This study extends the hyperlocal definition by including media platforms other than websites. The results show that the operations indeed aim to support and foster citizenship, strengthen democracy and mirror the local community. At the same time, as shown by other studies, the fact that they are not large-scale, highly profitable operations may challenge their sustainability. Nonetheless, most of them claim to be profitable, largely because of the print platform, and have a positive outlook on the future. Revenues from advertising and readership are currently less substantial for Web-based operations, which reinforces the need to broaden the definition of hyperlocal publishing platforms when talking about financial sustainability. Currently, hyperlocal media in Sweden, with small resources and a lower publishing frequency, cannot be viewed as a replacement of established media, but play important roles as complementary alternative voices and contribute to media plurality in the local community.  相似文献   

An analysis of the relationship between the linear hammer speed and the thrower applied forces during the hammer throw for male and female throwers     

Brice SM  Ness KF  Rosemond D 《Sports biomechanics / International Society of Biomechanics in Sports》2011,10(3):174-184

The purpose of this study was to investigate the relationship between the cable force and linear hammer speed in the hammer throw and to identify how the magnitude and direction of the cable force affects the fluctuations in linear hammer speed. Five male (height: 1.88 +/- 0.06 m; body mass: 106.23 +/- 4.83 kg) and five female (height: 1.69 +/- 0.05 m; body mass: 101.60 +/- 20.92 kg) throwers participated and were required to perform 10 throws each. The hammer's linear velocity and the cable force and its tangential component were calculated via hammer head positional data. As expected, a strong correlation was observed between decreases in the linear hammer speed and decreases in the cable force (normalised for hammer weight). A strong correlation was also found to exist between the angle by which the cable force lags the radius of rotation at its maximum (when tangential force is at its most negative) and the size of the decreases in hammer speed. These findings indicate that the most effective way to minimise the effect of the negative tangential force is to reduce the size of the lag angle.  相似文献   

Long-term outcomes of the ?VIVA! Peer Tutor Project: use of MedlinePlus by former peer tutors and the adults they taught     

Cynthia A Olney  Lucille Hansen  Ann Vickman  Sara Reibman  Frederick B Wood  Elliot Siegel 《Journal of the Medical Library Association》2011,99(4):317-320

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The Expression of Depressive Symptomatology in Korean American Undergraduates: Sex and Generational Differences          下载免费PDF全文

Jeanett Castellanos  Alberta M. Gloria  Sara Cho Kim  Yong S. Park 《Journal of College Counseling》2014,17(3):208-221

This study examined the influence of acculturation and perception of the university environment on the depressive symptomatology of 228 Korean American undergraduates, with a focus on sex and generational differences. Perceptions of the university environment and perceived barriers were positive predictors of depressive symptomatology in respective regression equations by sex and generation. Study limitations and counseling practice implications are discussed.  相似文献   

The Importance of Implementation Fidelity Data for Evaluating Program Effectiveness          下载免费PDF全文

Rochelle Fisher  Kristen Smith  Sara Finney  Kathryn Pinder 《About Campus》2014,19(5):28-32

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