Abstract

Makrofol-DE 1-1 CC Polycarbonate is a class of polymeric solid state nuclear track detector which has many applications in various radiation detection fields.

Structural property studies using X-ray diffraction were performed on the non-irradiated and irradiated Makrofol samples. The intensities of the characteristic absorption bands were found to decrease predominantly with increasing the proton fluence in the ranges 0-5x10¹¹ ions/cm² indicating that the degradation is the dominant mechanism.

Non isothermal studies were carried out using thermo-gravimetric analysis (TGA) and differential thermo-gravimetric (DTG) to obtain information concerning the thermal stability for Makrofol detector. The obtained TGA thermograms indicated that the Makrofol detector decomposes in one main weight loss stage.

Using the TGA curves, both the onset temperature of decomposition and the activation energy of thermal decomposition were calculated. The results indicated that the proton irradiation of Makrofol detector in the fluence range 0-5x10¹¹ ions/cm² causes an initial scission that reduces the thermal stability of the Makrofol samples. The proton irradiation in the fluence range 5x10¹¹-1x10¹⁵ ions/cm² led to a more compact structure of Makrofol polymer, which resulted in an improvement in its thermal stability with an increase in the activation energy of thermal decomposition.

Electronic management is considered as one of the basic components of the information system, and one of the means that has caused a great stir in our present era, as the need for it has become very urgent and necessary in various fields and sectors, especially in the management of the education sector, as it represents one of the quality standards (the use of technical means in the institution educational), therefore, the aim of this research is to closely identify its concept and explain its importance in the success of managing educational institutions in all their administrative, educational and office aspects. In this research, some basics were presented as an introduction to the topic under study to ensure clear understanding. The research also pointed out some of the challenges and obstacles facing the application of electronic management and proposed solutions to overcome these obstacles.   The researchers used the descriptive approach to suit the research objective. Various sources were reviewed, including research articles, books, and reports

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The role of the mother tongue in second language learning has

recently sparked debates and controversies. This study investigates the

use of the first language (L1) in the learning and teaching of English as

a second language (L2) in primary school. The main goal of study is to

determine to what extent and in which instances the first language (L1)

is used and the response of second language educators when they hear

the first language (L1) in their classroom. Most educators feel that the

use of the first language (L1) should be minimized and they feel guilty

if they use it a lot. When challenged, they find it difficult to explain

why. Contrary to the use of the first language (L1), it is generally

assumed that English should be learned through English, just as you

learn your mother tongue using your mother tongue. On the other

hand, the idea that the learner should learn English like a native

speaker or try to 'think in English' is viewed as an inappropriate and

unachievable concept.

This study aims to examine the difficulties that encounter undergraduate students of

fourth year at English Department of Alassaba College, in writing proposals and

research projects in the early stages. The target group for this study consisted of finalyear

undergraduates at the College of Alassaba English Department, The study

involved approximately 60 participants from the Department of English, who were

conducting their research projects in English as a Second Language (ESL). The

Research tools of the study include questionnaire with students of the target groups.

The study will explore various and common challenges/difficulties during writing the

research proposals and projects such as: difficulty in deciding the topic for research,

lack of good knowledge of the methodology, inability of finding modern, specialized

and related references, lack of interest in research, lack of understanding of the

subject matter, lack of time, and research guiding. The study also attempts to give

some suggestions/recommendations for developing the process of writing research

proposals and research projects.