Trends in the development of student level of reasoning in pattern generalization tasks across grade level     

Murad Eid Jurdak  Rabih Raif El Mouhayar 《Educational Studies in Mathematics》2014,85(1):75-92

This paper explored (1) the developmental trend of student level of reasoning across grade level in pattern generalization; (2) the mediatory role of task variables in the developmental trend of student level of reasoning within and across tasks; and (3) developmental trend of student level of reasoning associated with strategy use across grade level. A test designed to measure student level of reasoning was given to a sample of 1232 students from grades 4 to 11 from 5 schools in Lebanon. The Structure of the Learned Outcomes or Responses (SOLO) was used as a theoretical model. Results show that student level of reasoning exhibited an increasing trend across clusters of grade levels and that there were several SOLO levels in each cluster of grade levels. Type of task (immediate, near, far) and function type (linear, non-linear) seem to mediate the development of level of reasoning across grade level but the complexity of the task (simple, more complex) did not. Students used several strategies in each cluster of grade levels and the developmental trends of student level of reasoning associated with strategy use were not uniform and varied across clusters of grade levels, thus supporting a neo-Piagetian interpretation of the results.  相似文献   

What do you mean by learning lab?     

Sanchez  Eric  Paukovics  Elsa  Cheniti-Belcadhi  Lilia  El Khayat  Ghada  Said  Bilal  Korbaa  Ouajdi 《Education and Information Technologies》2022,27(4):4501-4520

Education and Information Technologies - Digital and innovation competencies are nowadays highly required for students and faculty members in higher education institutions. We therefore need...  相似文献   

Life Cycle Management Considerations of Remotely Sensed Geospatial Data and Documentation for Long Term Preservation     

Mohammad Khayat  Steven J. Kempler 《Journal of Map & Geography Libraries》2015,11(3):271-288

As geospatial missions age, one of the challenges for the usability of data is the availability of relevant and updated metadata with sufficient documentation that can be used by future generations of users to gain knowledge from the original data. Given that remote sensing data undergo many intermediate processing steps, for example, an understanding of the exact algorithms employed and the quality of that data produced could be key considerations for these users. As interest in global climate data is increasing, documentation about older data, their origins, and their provenance are valuable to first-time users attempting to perform historical climate research or comparative analysis of global change. Incomplete or missing documentation could be what stands in the way of a new researcher attempting to use the data. Therefore, preservation of documentation and related metadata is sometimes just as critical as the preservation of the original observational data. The Goddard Earth Sciences–Data and Information Service Center (GES DISC), a NASA Earth science Distributed Active Archive Center (DAAC) that falls under the management structure of the Earth Science Data and Information System (ESDIS), is actively pursuing the preservation of all necessary artifacts needed by future users.

In this article, we will detail the data custodial planning and the data lifecycle process developed for content preservation, and our implementation of a Preservation System to safeguard documents and associated artifacts from legacy (older) missions, as well as detail lessons learned regarding access rights and confidentiality of information issues. We also elaborate on key points that made our preservation effort successful; the primary points being drafting of a governing baseline for historical data preservation from satellite missions and using the historical baseline as a guide to content filtering of what documents to preserve. The Preservation System currently archives documentation content for High Resolution Dynamics Limb Sounder (HIRDLS), Upper Atmosphere Research Satellite (UARS), Total Ozone Mapping Spectrometer (TOMS) mission data, and the 1960s era Nimbus mission. Documentation from other missions like the Tropical Rainfall Measuring Mission (TRMM), the Ozone Monitoring Instrument (OMI), and the Atmospheric Infra-Red Sounder (AIRS) are also slated to be added to this repository, as well as other mission datasets to be preserved at the GES DISC.  相似文献   

I. SLEEP AND DEVELOPMENT: INTRODUCTION TO THE MONOGRAPH          下载免费PDF全文

Mona El‐Sheikh  Avi Sadeh 《Monographs of the Society for Research in Child Development》2015,80(1):1-14

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CONTRIBUTORS          下载免费PDF全文

Mona El‐Sheikh 《Monographs of the Society for Research in Child Development》2015,80(1):196-200

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A general theory of elastic stability : J.M.T. Thompson and G.W. Hunt. 322 pages,diagrams, 6x9 in. London,John Wiley, 1973. Price, $22.00 (approx. £9·10).     

M.S. El Naschie 《Journal of The Franklin Institute》1975,299(6):468-470

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Frequency dependent dynamic properties from resonant column and cyclic triaxial tests   总被引：1，自引：0，他引：1  

Z. Khan  M.H. El Naggar 《Journal of The Franklin Institute》2011,348(7):1363-1376

The resonant column (RC) and cyclic triaxial (CT) devices are commonly used for the measurement of soils’ dynamic properties. The results of these tests do not agree when extrapolated to similar strain levels. The main objectives of this paper are to evaluate the effect of excitation frequency on the dynamic properties of soils, and to provide a methodology to reconcile shear modulus values obtained from RC and CT tests. The effect of frequency on the dynamic properties is evaluated using the new non-resonance (NR) method in the RC device and CT tests. Sand specimens with varying percentages of bentonite-water mixture and a clay specimen are tested. The results obtained from RC tests utilizing the NR method indicate significant change in shear modulus with frequency. The extrapolation of shear modulus from the conventional RC results to shear strains used in CT is significantly overestimated. The extrapolations improved when the results were corrected for frequency effect inferred from the NR method.  相似文献   

Analysis of adaptive detection of moderately fluctuating radar targets in target multiplicity environments     

Mohamed B. El Mashade 《Journal of The Franklin Institute》2011,348(6):941-972

In this article, we provide a complete detection analysis, in its exact form, of what is known as moderately fluctuating radar targets when the background environment contains a number of interfering targets along with the target under test. The illumination of this class of radar targets by a coherent pulse train, return a train of correlated pulses with a correlation coefficient in the range 0<ρ<1 (intermediate between SWII and SWI models). Since the adaptive detection is one of the desirable features for modern radar receivers, it becomes of importance to adaptively detect this class of targets. The attractive class of adaptive detectors is that based on order-statistics (OS) technique. The more advanced version of the OS algorithm, known as the generalized trimmed-mean (GTM) scheme, is chosen here to carry out this task. It implements trimmed averaging of a weighted ordered range samples. This processor is analyzed for the case where the radar receiver incorporates a postdetection integrator amongst its contents and where the operating environment is multitarget. The primary and the secondary interfering targets are assumed to be fluctuating in accordance with partially correlated χ² fluctuation model. SWI and SWII well-known models represent the cases where the signal is completely correlated and completely decorrelated, respectively, from pulse to pulse. It is shown that the processor performance improves, for weak SNR of the primary target, as the correlation coefficient ρ_s increases and this occurs either in the absence or in the presence of spurious targets. For strong SNR, on the other hand, the processor performance degrades as ρ_s increases and the SWI and SWII models enclose the correlated target case and this behavior is common for all GTM based schemes.  相似文献   

Identification of Differentially Expressed Genes by?cDNA-AFLP Technique in Response to Drought Stress?in Triticum durum     

Marouane Melloul  Driss Iraqi  MyAbdelaziz El Alaoui  Gilles Erba  Sanaa Alaoui  Mohammed Ibriz  Elmostafa Elfahime 《Food Technology and Biotechnology》2014,52(4):479-488

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Osmotic Concentration of Gooseberry Fruits – The Influence of Temperature,Time and Pretreatment Methods on Mass Transfer and Total Polyphenol and Organic Acid Content     

Anna Kucner  Robert Klewicki  Micha? Sójka  El?bieta Klewicka 《Food Technology and Biotechnology》2014,52(4):411-419

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