Implementation of an innovation: Meeting the concerns of teachers   总被引：1，自引：0，他引：1  

Rudolf van den Berg  Peter Sleegers  Femke Geijsel  Roland Vandenberghe 《Studies in Educational Evaluation》2000,26(4):1

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Multimedia Cases in Elementary Science Teacher Education: Design and Development of a Prototype   总被引：1，自引：0，他引：1  

Ellen van den Berg  Irene Visscher-Voerman 《Education and Information Technologies》2000,5(2):119-132

Multimedia cases intend to bring about fundamental changes in teacher education by bridging the gap between theory and practice. The use of information and communication technology in multimedia cases is expected to create a powerful and flexible learning environment. Such a learning environment is in line with a constructivist vision of teaching and learning. This paper focuses on the rationale behind case-based instruction by describing the design and development of a prototype and addressing the justification of underlying design decisions. Moreover, the prototype is briefly outlined and formative evaluation results are presented.  相似文献   

Symptoms of common mental disorders and related stressors in Danish professional football and handball     

Özgür Kilic  Haruhito Aoki  Rasmus Haagensen  Claus Jensen  Urban Johnson  Gino M. M. J. Kerkhoffs 《European Journal of Sport Science》2017,17(10):1328-1334

The aim of the study was twofold, namely (i) to determine the prevalence of symptoms of common mental disorders (CMDs) among current and retired professional football and handball players and (ii) to explore the relationship of psychosocial stressors with the outcome measures under study. A total of 1155 players were enrolled in an observational study based on a cross-sectional design. Questionnaires based on validated scales were set up and distributed among current and retired professional football and handball players by the Danish football and handball players’ union. In professional football, the highest prevalence (4 weeks) of symptoms of CMDs was 18% and 19% for anxiety/depression among current and retired players, respectively. In professional handball, the highest prevalence (4 weeks) of symptoms of CMDs was 26% and 16% for anxiety/depression among current and retired players, respectively. For both the current and retired professional football and handball players, a higher number of severe injuries and recent adverse life events (LE) were related to the presence of symptoms of CMD. Players exposed to severe injuries and/or recent adverse LE were 20–50% times more likely to report symptoms of CMD. The results suggest that it is possible to recognize the population of professional athletes that are more likely to develop symptoms of CMD. This could create the opportunity to intervene preventively on athletes that suffered from severe injury and/or recent adverse LE that could lead to a faster and safer recovery and psychological readiness to return to play.  相似文献   

Asymptotic solution of heaviside's fractional operators     

E.J. Berg  S.J. Haefner  J.J. Smith 《Journal of The Franklin Institute》1928,205(2):221-228

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Heaviside's operators in engineering and physics     

Ernst Julius Berg 《Journal of The Franklin Institute》1924,198(5):647-702

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The preparation of pure alloys     

Ernst Julius Berg 《Journal of The Franklin Institute》1924,198(6):794

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New antifogging agents in developers. II     

A.P.H. Trivelli  E.C. Jensen 《Journal of The Franklin Institute》1931,212(2):155-169

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The depression of density produced by the presence of bromide in the developer of photographic emulsions exposed to light and to x-rays     

A.P.H. Trivelli  E.C. Jensen 《Journal of The Franklin Institute》1931,211(3):335-347

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Removal of Organic Acids from Indoor Air in Museum Storage Rooms by Active and Passive Sorption Techniques     

Signe Hjerrild Smedemark  Morten Ryhl-Svendsen  Jørn Toftum 《文物保护研究》2020,65(5):251-261

ABSTRACT

Adsorbent materials can be used for the removal of organic acids from air in storage rooms with heritage collections. The organic acid removal efficiency of two commercially available activated carbon air-filters were tested in situ in two unoccupied stores with densely packed collections. One filter was designed for outdoor type pollutants (Filter A), while the other was designed for organic acids in indoor air (Filter B). Furthermore, the acetic acid removal efficiency of a desiccant silica gel rotor used for dehumidification was measured in a laboratory at different relative humidity levels. Finally, passive removal of acetic acid by silica gel and unfired clay brick were tested in a chamber, and for clay brick at room level as well. Filter B had the highest removal efficiency. The removal efficiency of both filter types depended on the airflow and the filter performance varied considerably in situ from the values reported from standard laboratory tests. Increasing the filter airflow reduced the removal efficiency from 77% and down to 7% for Filter A, and from 92% to 24% for Filter B. There was almost no effect of active air filtration on the concentration of organic acids when this was measured in the middle and in the corner of the storage rooms away from the ventilation inlets. The desiccant dehumidifier removed 98–100% of the acetic acid from the air, independently of the relative humidity. The desiccant rotor will, however, only be running when there is a need for dehumidification and as a result will only periodically remove pollutants. The high acid removal efficiency by dry silica gel was furthermore demonstrated in a chamber test. A clay brick wall in a test room established a concentration gradient across the room and reduced the concentration of organic acids by 56% compared to close to the emission source.  相似文献   

Understandingg in terms of information processing     

Arthur R. Jensen 《Educational Psychology Review》1992,4(3):271-308

Psychometric g, the general factor in individual differences in all types of tests and performances involving any mental ability, has much wider importance and implications than are encompassed by the field of psychometrics. It is argued that the nature of g must be understood in terms of information processes rather than in terms of the specific knowledge and skills that are seen in the content of conventional mental tests. The wide range of individual differences in g and disparities in the distribution of g in different subpopulations have important implications for understanding some of the major problems confronting public education.  相似文献