In this work, excess properties (eg excess molar volume (VE), excess viscosity (ȠE), excess Gibbs free energy of activation of viscos flow (ΔG* E) and molar refraction changes (ΔnD) of binary solvent mixtures of tetrahydrofurfuryl alcohol (THFA) with aromatic hydrocarbons (benzene, toluene and p-xylene) have been calculated. This was achieved by determining the physical properties including density ρ, viscosity Ƞ and refraction index nD of liquid mixtures at 298.15 K. Results of the excess parameters and deviation functions for the binary solvent mixtures at 298.15 K have been discussed by molecular interactions that occur in these mixtures. Generally, parameters showed negative values and have been found to fit well to Redlich-Kister

In a resource-limited world, there is an urgent need to develop new economic models, from the traditional unsustainable industrial model of product consumption and disposal, to a new model based on the concepts of sustainability in its comprehensive sense, the so-called circular economy, using fewer resources in manufacturing processes and changing practices in product disposal to waste, by removing its use, recycling and manufacturing to start another manufacturing process. In an era of intense competition in domestic and global markets, the importance of the circular economy is highlighted in its ability to strengthen the competitiveness of enterprises in those markets, by reducing the cost and increasing the quality of the pro

This research aims to examine the effectiveness of a teaching strategy based on the cognitive model of Daniel in the development of achievement and the motivation of learning the school mathematics among the third intermediate grade students in the light of their study of "Systems of Linear Equations”. The research was conducted in the first semester (1439/1440AH), at Saeed Ibn Almosaieb Intermediate School, in Arar, Saudi Arabia. A quasi-experimental design has been used. In addition, a (pre & post) achievement test (20 Questions) and a (pre & post) scale of learning motivation to the school mathematics (25 Items) have been applied on two groups: a control group (31Students), and an experimental group (29 Students). The resear

The present study addressed "Performance Appraisal of Human Resource Management and Its Effect on Achieving the Organizational Success", for the topics of performance appraisal of human resource management and the organizational success gained an increasing interest being relatively important and modern topics which had a great effect on the future of organizations.

The study aimed at revealing the pattern of appraising the performance of human resource management for the study sample, and whether it was qualified to lead the ministry towards the organizational success, for this purpose two main hypotheses were formulated: 1) there is a positive significant correlation between both variables: performanc

Parents who give their sons arole in making parental decisions and admiring their views are the ones who build confidence and the feeling of competence within themselves and then their edgiest- rent with themselves becones better .
The (A.B) person-ality type is the core base of most psychological and educational studies because it is one of the most important subjects Concerning with the study of growth aspects whether they are physical, mental or Social. The present Study ains to measure the level of parental treatment among high School students, measure the level of (A) Personality type concept among them, recognize Statistically Significant differences in the level of parentaltreatment according gender variable and recognize the C

What we observe from the weakness of the students in some of different subjects may be due to that students are learning these traditional methods and competing to acquire the mark, and attain their teachers' interest ,then their only aim becomes the academicsuccess, and this is whatcontradicts the modern educational philosophy.

          Education needs to be providing it with new ideas and methodologies toprepare an emerging demonstrated scientific reason to distance them from the tradition and indoctrination that do not create generations able to address theexpected problems.

The cognitive behavior of reflectiveincludes planning skil

    تعد شريحة المعلمين والمدرسين من أهم الشرائح في المجتمع لما لها من أهمية ودور كبيرين  في إعداد الأجيال إلى مراحل  دراسية الجامعية والأعمال والمهام التي يتطلبها منهم المجتمع في المستقبل ، لذا سعت الدوائر والمؤسسات التربوية للاطلاع والوقوف على المعيقات التي يمكن أن تؤثر على هذه الشريحة من حيث الإعداد أو الحجم أو التخصص أو الخبرات من اجل رفد العملية التربوية والمؤسسات التربوية بكل الإمكاني

Acquisition of metacognition has an effective and important role in educational process, so it can reduce difficulties faced by learners during theirunderstanding of the subjects.

Brown (1980) considers that it is conscious and reflective controlcarried out by the individual in his actions and cognitive responses through the use of self-regulation skills (planning, monitoring and evaluation).

The search problem raises through following question: Havestudents  ofhigh school for distinct metacognition?

Metacognition is very important  , so the effective learninginvolves planning and goalsetting, and monitoring the progress of the individual and adapted as needed, and allthese activities are metacognition i

Back ground: AIDS is considered a dreaded disease.
According to recent estimates, 42 million people suffer
from HIV/AIDS (90% of these being in the developing
countries), with 5 million people newly infected with HIV
and 3.1 million deaths in the year 2002 globally. At
present, there is no effective vaccine to prevent the
disease. Hence, Health education (Information, Education
and Communication) activities bringing about behavioral
changes in the community, promoting healthy sexual
behavior and preventing the risky ones is the best possible
solution to the problem of AIDS.
Objectives: To find out the knowledge, beliefs and
attitudes regarding various aspects of HIV/AIDS amongst
intermediate and sec