In cognitive radio networks, there are two important probabilities; the first probability is important to primary users called probability of detection as it indicates their protection level from secondary users, and the second probability is important to the secondary users called probability of false alarm which is used for determining their using of unoccupied channel. Cooperation sensing can improve the probabilities of detection and false alarm. A new approach of determine optimal value for these probabilities, is supposed and considered to face multi secondary users through discovering an optimal threshold value for each unique detection curve then jointly find the optimal thresholds. To get the aggregated throughput over transmission

Background: The study was designed for the assessment of the knowledge of medical students regarding pandemics. In the current designed study, the level of awareness was checked and the majority of students were found aware of SARS-CoV and SARS-Cov2 (Covid-19).

Objective: To assess the awareness of SARS-CoV and SARS-Cov2 (Covid-19) among medical students of Pakistan.

Subjects and Methods: A cross-sectional survey was carried out in different universities of Pakistan from May to August 2020. A self-constructed questionnaire by Pursuing the clinical and community administration of COVID-19 given by the National Health Commission of the People's Republic of China was used am

Stuck pipe is a prevalent and costly issue in drilling operations, with the potential to cost the petroleum industry billions of dollars annually. To reduce the likelihood of this issue, efforts have been made to identify the causes of stuck pipes. The main mechanisms that cause stuck pipes include drill cutting of the formation, inappropriate hole-cleaning, wellbore instability, and differential sticking forces, particularly in highly deviated wellbores. The significant consequences of a stuck pipe include an increase in well costs and Non-Productive Time (NPT), and in the worst-case scenario, the loss of a wellbore section and down-hole equipment, or the need to sidetrack, plug, or abandon the well. This paper provides a comprehensive

إستأثر مفهوم قوة التحمل النفسي (Psychological Hardiness)      رغم حداثته نسبياً بأهتمام العديد من الباحثين والدارسين . وحاولت الدراسات إبراز دوره المهم والفاعل في منع حدوث التأثيرات السلبية المتوقعة التي تحدثها ظروف الحياة الضاغطة على قابلية الفرد بصورة عامة ولا زال الاهتمام مستمراً في التحقق من هذا الدور . وتحاول الدراسة الحالية أن تلقي مزيداً من الضوء على هذا المفهوم وطبيعته مما يز

Current research aimed at measurement of management of emotional among counselors and  knowledge of emotions management according to the variables of sex and length of service with counselors.

The Scale applied to a sample of basic research, amounting to (300) counselors.

1- That counselors have administration emotional.

2- There are no differences in the management of emotional statistically significant according to the variable (gender).

3- statistically significant differences according to the variable (length of service) in the management

The great scientific evolution and the expansion of the demands of life, especially in the field of architectural design make human's need increased to use his abilities and all possibilities in active way to have a main role in this progress. To achieve his role in this progression which is can not be achieved and accomplished only by depending on  the mental capacity including intelligence spatial / visual, which is one of the branches of the theory of multiple intelligences. This theory is one of the most important theories which we strongly need it to reveal this type of intelligence in order to know the teachers on learners' abilities to put appropriate methods to deal with them.of this current research as follows:

The aim of this research is to recognize the tasks undertaken by   the   headmasters   of   intermediate   schools   concerning   time- administration,   in   accordance   to   the   viewpoints   of   the headmasters   of   intermediate   schools   in   the   Administration   of Education   of   Al-Karkh   the   Third.   The   sample   of   this   research consists   of   (60)   headmasters   and &n

      This research is based on  interaction of two most important variables to the business organizations in the current era ,  these two variables are (marketing orientation and quality of service),  this research is trying to urge the service organizations to reconsider the mechanisms adopted in the formulation of its plans, It was the application of research in Korek Telecom and Asia Cell Telecom as a sector of service active and important in the business sector in Iraq, the information was obtained through the design of the Likert questionnaire , it was distributed (92) questionnaire , (50) for the company Korek Telecom and (42) of the Asia-Cell and represent research population sample

Abstract

In this research provide theoretical aspects of one of the most important statistical distributions which it is Lomax, which has many applications in several areas, set of estimation methods was used(MLE,LSE,GWPM) and compare with (RRE) estimation method ,in order to find out best estimation method set of simulation experiment (36) with many replications  in order  to get mean square error and used it to make compare , simulation experiment  contrast with (estimation method, sample size ,value of location and shape parameter) results show that estimation method effected by simulation experiment factors and ability of using other estimation methods such as(Shrinkage, jackknif

The social support is considered one of the most important constituents of
society and the one which can ensure its unity.
The resources of social support are different accordind to the variety and
the multiplication of the net – work of the social relationships that are
established among the individuals. The importance of this variable is evident
in the emolional adaptation and the mental health as well as its role in mitigating of the illness threating and in accelerating the recovery. social support can enhance the individuals ability to tolerate and face the emotional
and physical problems in the time of cris and stressful life conditions.
The most important results are shown as follows :
1- It was