The thermovoltaic detection (TVD) technique is based on measurement of the EMF generated by two dissimilar metal electrodes in contact with the specimen. This technique has recently been applied when investigating different types of materials involving thermal decomposition reactions which have more normally been studied by conventional thermal analysis techniques, such as DTA, TG, etc. This paper reports the application of the combined TVD and DTA techniques for thermal characterization of materials. The Harrop DTA system has been modified such that measurements by the two techniques can be made simultaneously in the same environment. Data have been obtained on different types of materials, e.g., NiSO,.6H,O and CoSO,.7H,O, etc., at a programmed heating rate of 10” C rnin- ‘. Results obtained by these techniques are discussed and compared with the corresponding values in the literature.
Ragiab Ali Mokhtar(5-1990)

The paper discusses how L2 writers use their L1 while writing in L2. It investigates L1use in L2 by exploring the results of ten studies that examined it from different perspectives and in different contexts. By introducing the results of L1 use by L2 writers,ESL/EFL teachers will play a great role by helping students use their L1 positively andavoid the negative impacts of L1 use. This kind of research is of significance because thestudied research results showed that further research is needed in this area. This reviewwill provide a basis for ideas to investigate L1 use in L2 writing.The paper focuses on an important skill in English language teaching which is writing.The focus of the paper is L1 use which has been considered as taboo. This would targetthe interest of most of HLT audience, especially writing teachers. The main mission is tointroduce the role of L1 use in L2 writing. This paper reviews the second language (L2)writers’ use of the first language (L1) while composing in the second language (L2) inten studies. Those studies looked at three proficiency groups that included adult high- proficient, intermediate, and low-proficient writer’s use of L1. The results indicated thatL1 is used frequently while writing in L2 by translating, language-switching, and backtracking. It was also noticed that L1 use had positive effects on L2 text. arabic 11 English 66
Entisar ALi Hadi Elsherif(12-2012)

يهدف البحث الحالي إلى التعرف على المستويات المعرفية في إطار النسق الهرمي للعالم روبرت لجانييه والكشف عن الشروط الواجب مراعاتها لكل مستوى في النسق الهرمي. arabic 91 English 11
مسعودة مفتاح أحمد عبدالرحمن الحسيني(1-2021)