Abstract  

All central air conditioning systems contain piping system with various components, sizes, material, and layouts. If such systems in operating mode, the flow in piping system and its component such as valves can produce severe vibration due to some flow phenomenon’s. In this research, experimental measurements and numerical simulation are used to study the flow-induced vibration in valves. Computational fluid dynamics (CFD) concepts are included with one-way and two-way fluid-structure interaction concepts by using finite element software Package (ANSYS 14.57). Detection analysis is performed on flow characteristics under operation conditions and relations with structural vibration. Most of

Strategy Descrtibes How an Organization Matches its own Capabilites With Opportunities in Environment , in Order to Accomplish its Overall Objectives , So That The Organization is Considering Responding to Challenges by Adopting one or More of Strategies, Like Differentioning its Product, or Achieving Cost Leadership.

The Key Role of Management Accountant is to Evlaute The Successful it Has Been in Implementing Organization Strategy.

This Research Target to Explain The Key Role of Management Accountant in Evaluate of  Organization Strategy. by Strategic Analysis of Operating Income From Specific Sources Such as Cost Savings and Growth in Stead of Emphasizing Only The Aggrega

There are a lot of measures for Post Traumatic Stress Disorder (PTSD), but what distinguishes it from other measures is the number of short paragraphs and concise depending on the classification of American Psychiatric Association (APA), which can be applied by the researchers on a large number, Because the Iraqi society suffered from psychological trauma due to wars, conflicts and occupation and the resulting psychological disorders of the members of Iraqi society, especially post-traumatic stress disorder, as mentioned by many studies and researches.

Therefore, the aim of this study was to standardize the PTSD scale for students at Baghdad University. For the Psychologist Fua . E. which was applied in many foreign studies. 

تُعد القيادة من المواضيع التي نالت اهتماماً كبيراً من لدن الباحثين في مختلف حقول المعرفة، وقد تعاظمت أهمية القيادة الإدارية في الوقت الحاضر نتيجة للتغيرات التي يشهدها العالم اليوم في جميع الميادين، وان نجاح القيادة الإدارية في ظل هذه التغيرات يتطلب قادة ذوي كفاءة عالية للقيام بأدوارهم على أفضل وجه من أجل تحقيق الأهداف الموكلة إليهم.

إن المهمة الأساسية لقادة اليوم تكمن في إحداث انطباع جي

At the present time, human lives in a changable world. Complexity of life effects human who became unable to achieve his goals. For him, goals are no longer able to provide him with calm and psychological safty. Anxiety about indefinite future and any changes which transend his ablity to cooperate with affeets his life in general aspeets.

     All these things bring him a very sever tention, then he becomes extremace in his cooperation with these situations. He tends to live a lone in order to be a way from sequenees of changes. Starting from this urgent point, future compnses the core in youth's life, then so many theories and studies affirm this point, and the necessity for mahing sc

تظهر اهمية مفهوم ألذات من حيث انه احد دوافع الفرد الداخلية التي لها تأثير معين على التحصيل الدراسي لدى التلاميذ وعلى تكيفهم مع بيئتهم التربوية أثناء الدراسة، لذلك فان معرفة كيفية قياس مفهوم ألذات وأدراك الفرد لذاته تساعد في عملية تقويم الفرد من حيث قدرته على التكييف وثقته بنفسه كما تفيد في التخطيط عن طريق وضع برامج تساعده في زيادة مفهوم ذاته عن نفسه.

ومما لاشك فيه ان مرحلة الطفولة لها اهمية

Hopelessness can be consider as a subtype of depressions, it can be defined as having no expectation of good or success, giving no ground for hope, incapable of solution management or accomplishment .

Hopelessness is one of psychological variables that distinguish negative personalities because there are positive correlation between hopelessness and variables such as : anxiety, depression, suicide thought and so on .

One of the important variables correlate with hopelessness is low self-esteem, many studies indicate that there are statistically significant inverse relationship between the two variables, the present study aimed to :

1. Measures hopeless

            Toxoplasma gondii is an opportunistic parasite in immune-compromised persons. The prevalence of toxoplasmosis in psoriasis patients is investigated. In addition, the treatment effect on psoriasis patients infected with toxoplasmosis through evaluating Tumor Necrosis Factor-α (TNF-α) cytokine levels is studied. Blood samples were collected from 130 individuals who involved 60 control samples and 70 samples with psoriasis. They attended Medical City Hospital in Baghdad province from October 2017 - February 2018. Then, the anti- T. gondii antibodies (IgM and IgG) and TNF- α in the sera were determined via the enzyme linked immune-sorbent assay. The highe

The research discusses the obstacles that faced the Iraqi strategic performance in achieving sustainable development after the election of the first Iraqi government in 2005 and the most important strategies to overcome these obstacles.

The paper is highlighting the athletics and heroic sports which encouraged and played at Greek and Islamic period. The paper is identifying the Islamic athletics and heroic sport and compare them with Greek sports, as it is the model of sports while the sport during the Islamic period was not undertaken by scientific researches or articles even in Wikipedia. Although, this period was encouraged and practice many sports such as archery, sword grappling  and wrestling, equestrianism, jogging and running whereas there are many Arabic references revealed during the Islamic 610 A.D. while the Greek and Olympic was known at 732 A.D. The paper is followed the literature review and historical to shied a light scientifically about tradition