The consensus algorithm is the core mechanism of blockchain and is used to ensure data consistency among blockchain nodes. The PBFT consensus algorithm is widely used in alliance chains because it is resistant to Byzantine errors. However, the present PBFT (Practical Byzantine Fault Tolerance) still has issues with master node selection that is random and complicated communication. The IBFT consensus technique, which is enhanced, is proposed in this study and is based on node trust value and BLS (Boneh-Lynn-Shacham) aggregate signature. In IBFT, multi-level indicators are used to calculate the trust value of each node, and some nodes are selected to take part in network consensus as a result of this calculation. The master node is chosen

This research was carried out to study the effect of plants on the wetted area for two soil types in Iraq and predict an equation to determine the wetted radius and depth for two different soil types cultivated with different types of plants, the wetting patterns for the soils were predicted at every thirty minute for a total irrigation time equal to 3 hr. Five defferent discharges of emitter and five initial volumetric soil moisture contents were used ranged between field capacity and wilting point were utilized to simulate the wetting patterns. The simulation of the water flow from a single point emitter was completed by utilized HYDRUS-2D/3D software, version 2.05. Two methods were used in developing equations to predict the domains o

      يهدف هذا البحث إلى دراسة مسببات الصراع، والتي شملت (المصالح الشخصية، التمايز المهني والوظيفي، ضعف التنسيق والتعاون وسوء تحديد الواجبات ووصف العمل)، وأثرها في قرارات المستشفى التي شملت (مدى تحقيق الأهداف، خدمة المريض وإرضاءه، كفاءة استخدام الموارد المتاحة، ومكافأة العاملين وتحفيزهم).

      لقد تم اختيار مستشفى بغداد التعليمي ومستشفى غازي الحريري التابعتين لدا

Abstract

The decision maker needs to understand the strategic environment to be addressed through different means and methods. It is obvious that there is a difference between the three strategic environments (conflict environment, peace environment, post- peace environment) in terms of inputs and strategies to deal with each one of them. There is an urgent need to understand each pattern separately, analyze its inputs, and identify the factors and variables that affect the continuity of this situation (conflict, peace, post-peace). It is not appropriate to identify treatment without diagnosis of the condition, so it is very important to understand the type of strategic environment to be dealt with it.

يعتبر المتعلم الركيزة الاساسية الجيدة للتقدم العلمي لذا يجب ان يتم تزويده بمنظومة قيم متعددة لبناء مجتمع حديث متطور، ومن هنا جاء استخدام الاستراتيجيات لفتح افاق جديدة للتعلم ومنها استراتيجية الاستقصاء التعاوني الموجه اذا برزت مشكلة البحث في الابتعاد عن التدريس القائم على المدرس واتاحة الفرص للطالبات للبحث والاستقصاء تحت اشراف المدرس لتعلم مهارتي الهجمة بتغيير الاتجاه والمستقيمة المباشرة بسلاح شيش ا

       The present study aims to test a range of hypotheses about the effectiveness of each of the theory of transactional leadership, and the theory of transformational leadership in the Egyptian environment, and to identify any of them are better able to predict the effectiveness of leadership. And after the effect will be to identify the quality of the relationship between the leader and the subordinate in leadership , and what is the role of transformational leadership dimensions influencing the effectiveness of leadership. The field study was conducted on a sample of companies' public and private sector and the government in Egypt. The results of the study resulted in experimental that transacti

The purpose of this paper is use the Dynamic Programming to solve a deterministic periodic review model for inventory problem and then to find the optimal policies that the company must uses in the purchase or production  (in the practical application example the Al Aksa company purchase the generators from out side country).

ملخّص البحث     

ولقد انعم الله علينا بالنبي محمد صلى الله عليه وسلم الداعي إلى خير الأخلاق وأيسر الأعمال ، فالناس صنفان: مغضوب عليهم جفاة ، وضالون غلاة فما اصبح بالعباد من نعمة الا هو طريقها وما رام العقلاء غاية الا هو دليلها. وسبب اختياري للموضوع هو التطرف والغلو عند بعض الناس بحجة انهم على منهج النبوة والسلف الصالح في تطيق الشريعة السمحاء ولتبيين للناس كيف هو منهج الحبيب ا