نادية بوعلاق, نبيل بو السليو
كلية الاداب واللغات-جامعة سكيكدة - 20 أوت 1955 · الجزائر
Omar Ghoundale, المصطفى الوهابي
كلية الطب والصيدلة - مراكش-جامعة القاضي عياض · المغرب
Ahmed Al Hassan Elfaki, Isam Salih Mohamed Musa , Nooreldin Idriss Fadol Adam
كلية الدراسات العليا-جامعة السودان للعلوم والتكنولوجيا · السودان
The aim of this study is to assess of the natural environmental radioactivity level and evaluation doses calculations.Total 114 Samples were collected contain soil، rock and some foodstuff from different locations around South and North Kordofan states. The radioactivity concentration of238U،232Th،40K and 137Cs have been determined using γ-rayspectrometry NaI(Tl) detector .moreover، the absorbed dose rates ate in air at a height of 1m from the ground was calculated using four sets of dose rate conversion factors and the corresponding annual effective dose were estimated،the average value of 238U،232Th،40K and 137Cs in thesoil samples from South Kordofan were found to be 22.83،25.11،284.31and 0.28Bq.k-1 respectively.For South Kordofan. Activityconcentrations 238U،232Th،40K and 137Cs in the soil samples, were came out to be 22.08، 28.99 ،319.16 and 1.38Bqkg-1respectively. Predictive maps were constructed for both area for 238U،232Th،40K and absorbed dose using GIS program which showed a trend of increase to the Maintains area for soil Sample. Corresponding, for Foodstuff the average activity concentration of natural nuclides 238U،232Th and 40K fallout nuclide137Cs was 4.6، 4.4 and 326Bqkg-1respectively. Also activity concentrations of 238U،232Th and 40Kin rocks samples was 23.56، 29.57 and 330.58 Bqkg-1respectively.The obtained results were found to be less than the corresponding global values reported in the UNSCEAR publications for normal background areas. The absorbed dose rate in air at a height of 1m from the ground was calculated using four sets of dose rate conversion factors and the corresponding annual effective dose was estimated. On the average, the values obtained were: 25.60، 25.26، 26.57 and 29.61nGy.h-1for soil samples North Kordofan،26.08، 28.05، 32.88 and 31.00nGy.h-1 for soil samples South Kordofan، 28.80، 28.42، 33.95and 33.34nGy.h-1 for rock samples، 5.53، 5.48،5.00 and 6.16 nGy.h-1 for Foodstuff samples، and annual effective dose were: 31.20، 30.99،32.60 and 41.72μSv.y-1for the soil samples North Kordofan،37.16، 34.42، 38.53and 39.81μSv.y-1for the soil samples South Kordofan38.19، 34.88،39.60 and 40.92μSv.y-1 for rock samples and 7.89، 6.72، 6.13 and 7.56 μSv.y-1for Foodstuff samples، respectively for DRCFs (MC، MCNP، GEANT and UNSEAR).These values lie within the areas very close worldwide range for high background radiation. The obtained data can be used in baseline data for any future studiesfor the establishment of radiation map for Sudan.
خولة خميس سيف الكعبي , محمد أحمد عبدالدايم
كلية التربية -جامعة الإمارات العربية المتحدة-جامعة الإمارات العربية المتحدة · الامارات
Sofiane Lasmi, Fouzia Zoukrami
كلية التكنولوجيا-جامعة فرحات عباس - سطيف1 · الجزائر
L’objectif de ce travail est la préparation et la caractérisation des nanocomposites polypropylène /silice fumée (PP/SiO2) élaborés à l’état fondu dans un mélangeur interne, les effets du taux de l’agent compatibilisant de type polypropylène greffé par le maléique anhydride (PP-g-MA), le taux de l’agent de traitement de surface (acide stéarique) et le taux de nanocharge ont été évalués afin de considérer la dispersion de la charge et la qualité d’interface entre la silice et la matrice PP. Les différents échantillons ont été caractérisés par infra rouge à transformé de fourrier (IRTF) et la diffraction des rayons X (D-RX). Des études morphologiques, thermiques et mécaniques des échantillons ont été aussi effectuées afin de déterminer les paramètres permettant d’obtenir un matériau présentant des propriétés optimales. Les résultats ont montré une amélioration de la dispersion et d’interaction interfaciale avec une augmentation de la résistance au choc en présence de la charge traitée et le PP-g-MA. La silice non traitée a entraîné une augmentation du taux de cristallinité en présence de PP-g-MA. L’échantillon contenant 5% de la silice non traitée en présence de 2% de PP-g-MA a présenté de bonnes propriétés mécaniques, thermiques et morphologiques.
بوكاشة فاطمة , سهيلة بو خميس, شودار إلهام
كلية الحقوق والعلوم السياسية-جامعة 8 ماي 1945 قالمة · الجزائر
أفنان صادق محمود عناية, محمود كوري
كلية التربية-جامعة النجاح الوطنية · فلسطين
In the light of mounting interest in child education and the role of kindergartens in this education, the need has risen to investigate the evaluation of the growth of kindergarten children . This is in order to create an opportunity for proper education.The purpose of this study was to develop a proposed model for the evaluation of children in Nablus district kindergartens .This model was based on the following criteria :-1- Extent of physical and physiological development of the child .2- Extent of mental development of the child .3- Extent of linguistic development of the child .4- Extent of psychological development of the child .5- Extent of social development of the child .6- Child's state of health .7- Child's creativity skills .As means of structuring the problem, the researcher sought the answer to the following questions and hypotheses :-1- What is the required change to be implemented in the present kindergartens' children evaluation process in order to avoid the shortcomings of the present evaluation procedures and to attain the desired aims .2- What is the extent of the acceptability of the model by the sample of the study in terms of its criteria .Hypothesis:1- There are no statistically significant differences at the point (α= 0,5 ) levelbetween headmistresses' and supervisors' evaluation, on the one hand, and teachers' evaluation of the evaluations criteria and indicators pointing to them , on the other hand .2- There are no statistically significant differences at the point (α = 0,5 ) levelthat can be attributed to academic qualification variable between headmistresses' and supervisors' evaluation, on the one hand, and teachers' evaluation of evaluation criteria and indicators referring to them, on the other hand .3- There are statistically significant differences at the point (α = 0,5 ) level thatcan be attributed to years of experience variable showing headmistresses' and supervisors' evaluation, on the one hand, and teachers' evaluation of evaluation criteria and indicators referring to them, on the other hand .Methodology:The researcher has used a questionnaire of seven evaluation criteria that have indicators pointing to them. The questionnaire consisted of 60 items . The questionnaire was distributed among the sample population which totaled 105 subjects.To analyze the data, standard derivation, the means, and repeated measures design have been used .Finding:The results of the study showed the agreement of the sample study on the proposed evaluative model, criteria, and indicators referring to them .The results also showed the following :-1- There are no statistically significant differences at the point (α = 0,5 ) levelbetween the headmistresses' and supervisors' evaluation, on the one hand, and teachers' evaluation of the proposed evaluation model on the other hand .2- There are no statistically significant differences at the point (α = 0,5 ) levelthat can be attributed to academic qualification variable among the subjects of the research concerning the proposed evaluation model3- There are statistically significant differences at the point (α = 0,5 ) levelattributed to years of experience variable among the study sample pertaining to the proposed evaluated model .The Recommendations:In the light of these results, the researcher has the following recommendations :-1- Applying the proposed evaluation model in kindergarten .2- Introducing a variety of educational activities in the curricula of kindergarten 's education system . This would increase the efficiency of the evaluation process .3- Training kindergarten women teachers in a way that enables them to conduct the evaluation process in the right manner .4- Creating a kind of job satisfaction for the kindergarten women teachers so that they could perform their duty perfectly .5- Effective cooperation among kindergarten women teachers, headmistresses and supervisors to allow the evaluation process to succeed .6- Effective participation of parents in the evaluation process of children . This should be in terms of continuing, particularity the teachers of children .7- Colleges of education in the local universities should introduce a special major in kindergarten education, this contributing to the training of qualified teacher .8- There is a necessity to build the evaluation process on the children first hand experiences . Therefore, the kindergarten has to design a special form to allow teachers to write down first hand information about the child . The information has to deal with the following aspects :-A. Housing conditions of child .B. Child's normal behavior at home .C. Child's basic development .D. Child's first hand experience .
Boudraa Messaoud, Nadia Rafa
كليات العلوم والتكنولوجيا-جامعة 8 ماي 1945 قالمة · الجزائر
L’espace public de la ville fait l’objet de plusieurs recherches multidisciplinaires en architecture, en urbanisme, en sociologie, en économie et en politique…Il a joué toujours un rôle central dans la structure de la ville, considéré comme un support au système de déplacement et un contexte propice de multiples interactions.A l’instar de toutes les villes d’Algérie, les espaces publics de la ville de Guelma ont perdu leur identité dans la ville, vivent un usage varié entre eux et souffrent des fois, de la marginalisation. Cette recherche focalise l’analyse sur ces espaces, leurs localisations, leurs styles de conception, leurs composants, et leurs configurations spatiales, afin d’examiner les raisons de l’usage différencié et varié entre ces espace publics.Le cas d’étude choisi constitue La cité GUEHDOUR. Le diagnostic tiré de l’état de fait a montré que de l’aire d’étude est dégradé, en effet, la cité souffre de nombreux problèmes au niveau des espaces public.L’étude sociologique a confirmé les hypothèses qui suggèrent qu’Avec le projet urbain, la reconquête des espaces publics est devenue l’objectif pour revaloriser l’image de la ville pour la rendre vivable pour ses habitants.
Marilyn E Raschka, Neil Bratton
الجامعة الأمريكية في بيروت · لبنان
Djedjiga Mousli, Yasmine Achour
كلية الآداب واللغات-جامعة عبد الرحمان ميرة - بجاية · الجزائر
