Abstract

 This study investigated the optimization of wear behavior of AISI 4340 steel based on the Taguchi method under various testing conditions. In this paper, a neural network and the Taguchi design method have been implemented for minimizing the wear rate in 4340 steel. A back-propagation neural network (BPNN) was developed to predict the wear rate. In the development of a predictive model, wear parameters like sliding speed, applying load and sliding distance were considered as the input model variables of the AISI 4340 steel. An analysis of variance (ANOVA) was used to determine the significant parameter affecting the wear rate. Finally, the Taguchi approach was applied to determine

The research aims to identify the level of increase or decrease the product cost through the activity based flexible budgeting that gives us the chance to follows the cost since the product is planed to be made till it appears in the market and it also helps to fined out any problems that are expected to happen in the future and to put the costs under control, also to know much the surveying affects the perfect use for the complete resources in order to be used in the demanded way, the research is divided in to three sides ,the first is specialized for the theoretical side, the second is for the partical side, while the third side is specialized for the conclusions and recommendations.        &nbsp

Knowing the conduct of the common stocks during the different intervals of time (quarterly and yearly) is an important step in choosing and administrating the portfolio of common stocks which be in accordance with the tendency of the investor toward risk and revenues. This is an attempt to understand the behavior of this common stocks in Amman stock Exchange to discover the extent of change in its behavior for employing them by the managers in identifying the accurate and beneficed investments , which meet the ambitions of Arab investor.    

The aim of present work is to improve mechanical and fatigue properties for Aluminum alloy7049 by using Nano composites technique. The ZrO₂ with an average grain diameter of 30-40 nm, was selected as Nano particles, to reinforce Aluminum alloy7049 with different percentage as, 2, 4, 6 and 7 %. The Stir casting method was used to fabricate the Nano composites materials due to economical route for improvement and processing of metal matrix composites. The experimental results were shown that the adding of zirconium oxide (ZrO₂) as reinforced material leads to improve mechanical properties. The best percentage of improvement of mechanical properties of 7049 AA was with 4% wt. of ZrO₂ about (7.76% ) for ultim

The tax system, like any other system, as a set of elements and parts that complement each other and are interrelated and interact to achieve specific goals, and is a natural  reflection of the economic, social and political conditions prevailing in society, and therefore the objectives of tax policy formulated in line with the objectives of economic policy in general, which means that any change in economic policy clearly affects fiscal policy measures and fiscal policy in particular.

The problem of searching for the impact of foreign direct investment in the Iraqi tax system was focused on the study  the of foreign direct investment and therole played in developing and improving the economic reality and its implicatio

As we know the transportation studies regarded as one of a very
important and difficult studies and one of its difficulties created from the
process of data updating therefore the researcher well facing many difficulties
to balancing between the old data on collecting new data.
The research present an opinion which is summarized by: can we use
the old data after we updated and used it as alternatives? Or the researcher
must collect new data to complete their research which indicate to the present
situation and some times they cant complete their studies because of the
security, economic, temporally difficulties.
The research used two kinds of data, the old data which belong to the
period (1998) and new data

Neuroendocrine differentiation has been mentioned in many cancers of non-neuroendocrinal organs, involving the gastrointestinal tract. In contrast, the correlation of focally diffused neuroendocrine differentiation in colorectal adenocarcinoma with neuroendocrine cell hyperplasia has not been somewhat reported. The objective of this research is to study the relationship between neuroendocrine cell hyperplasia and neuroendocrine differentiation in colorectal adenocarcinoma and to find the correlation of neuroendocrine differentiation and VEGF expression with clinicopathological parameters of colorectal adenocarcinoma. Methods employed in the current study were including eighty-one patients with colorectal cancer. Formalin fixed paraffin e

    ملخّص البحث     

          حاول البحث دراسة أحوال الأدب العربى تحت الممالك أو الإمارات الإسلامية فى قارة أفريقيا الخضراء. ولضيق نطاق البحث ركزنا الجهود علي إمارة إلورن فى نيجيريا لتكون مرآة تنعكس فيها آثار هذه الممالك فى الأدب.   ولتحقيق الغرض المنشود من البحث عرضنا نبذة طفيفة عن تاريخ ظهور الممالك الإسلامية  فى قارة أفريقيا وأنواعها و

    دخلت حركة الإصلاحات العثمانية العراق مع تولي مدحت باشا ولاية بغداد (1869 -1872)  وكان لذلك اثر كبير في احداث تغيير جذري للمجتمع العراقي ، بدء من اجراء إصلاحات إدارية عززت من نظام الحكم المركزي وسعت الى التقليل من مظاهر الفوضى داخل المجتمع وصولا الى تكوين الوعي السياسي الجمعي والنخبوي للمجتمع العراقي ، منذ النصف الثاني للقرن التاسع عشر حتى مطلع القرن لعشرين. من هنا جاءت فكرة موضوع البحث للاستفادة التاريخية

تعد استخدامات المرأة ومشاركتها في تنفيذ العمليات الإرهابية لتنظيمات داعش من أخطر الظواهر الاجتماعية والسياسية والعسكرية في مجتمعنا الإسلامي والعربي، لما يحكم هذا المجتمع من عادات وتقاليد وأعراف وقيم لا تستطيع المرأة أن تخرج على السيطرة عليها، إذ اعتادت المجتمعات العربية بخاصة والإسلامية بعامة أن ترى المرأة بمكانه صاحبة الإيمان المحبة لأسرتها الحرة الأبية والمربية الفاضلة الرافضة كل القيم السلبية التي ت