شيد الفكر العربي المعاصر تحولات عدة فرضتها بعض التيارات الفكرية والفلسفية الغربية، وأثرت في تكوينه وتحديد اتجاهاته، فضلا عن التحديات التي بات لزاما عليه ان يتعامل معها ويمكن رد هذه التحديات الى عدة عوامل داخلية وخارجية أنتجت عدة تيارات تناولت موضوع العقلانية في الفكر العربي المعاصر، لعل أبرزها التيار الاصلاحي، التيار الليبرالي، والتيار العقلي النقدي

Text science presented a set of criteria to make the text essentially a project to create
texts and use. Me and means of cohesion script text scientists, two standard foundries and
knitting. Find this means their equivalent in the Arab rhetorical Heritage has been found, it
means foundries find Accompanying represented (link grammar in the classroom and link),
and referrals represented by (Baldmair, Ldefinition, and the name of the signal), and
deletion, and repetition, and presentation delays. As in the standard knitting it has confirmed
Albulagjun Arabs on the semantic consistency between the text components, as reflected in
the moral link in Chapter interfaces, as well as in moral coherence between parts of the te

عرف الإنسان اللؤلؤ منذ عصورما قبل التاريخ ، حيث كان يجمعه من الأصداف التي كانت تلقي بها الأمواج على الساحل . و لم تُمارس مهنة الغوص إلا في مرحلة لاحقة لم يحدد تاريخها .

العولمة وآليات حراكها في الوطن العربي

The Arabic medicine books have emphasized that the Arabic Pediatricians in their scientific career ,who searched in Various aspects concerns with pediatric , as well as that some  medical results and phenomena emphasized some data related to this subject . Which operates at the present time attention and concern towards human and in public and towards Pediatricians in special.

This research contained from an introduction that interpreted the Arabic medical heritage in progressing medicines in Europe then it mentioned the prominence  Arabic pediatricians . the researcher depended on references and sources which will the reader had found through research.

The Arabs took care of the Arabic language, collected it, and set standards governing it; This is for fear of melody, in order to preserve the language of the Noble Qur’an from distortion, after many of those who are not fluent in Arabic entered Islam; There were many reasons for setting linguistic standards, but although scholars set these standards, we see them often deviate from them, as well as the language’s departure from these restrictions that they set, because language cannot be restricted, as it is subject to the law of use.

In terms of each party's contribution to the common venture, partnership felt in several categories. It would be a complete partnership, that is, one in which all partnership, both capital and service; It could be an arrangement like the commenda (Arabic : Mudãraba , muqãraba , girãd) in which one party supplied the capital and the other service .
In Malikite and Hanaifite Law, It would take the form of a labor partnership, that is, one in which the only investment on the part of all its members was their skill or labor. In this last category of partnership, the captil itself considered solely or primarily of the labor of the partners.

In this paper the process of metal ions extraction (Zn(II) and Cu(II)) was studied in PEG-KCl aqueous two phase system was investigated without using an extracting agent. The experimental runs were performance at constant temperature (25 ^oC), constant mixing time (30 min), and constant PH of the solution (about 3). The effect of KCl salt concentration (from 10% to 25%), volumetric phase ratio of PEG solution to KCl solution (from 0.5 to 2), and the initial metal ion concentration (from 0.25 ml to 2 ml of 1 gm/L solution) were investigated on the percent extraction of Zn(II) and Cu(II). The results indicated that the percent extraction of metal ions increase with increasing of salt concentration and phase ratio, and slightly de

Maintaining and breeding fish in a pond are a crucial task for a large fish breeder. The main issues for fish breeders are pond management such as the production of food for fishes and to maintain the pond water quality. The dynamic or technological system for breeders has been invented and becomes important to get maximum profit return for aquaponic breeders in maintaining fishes. This research presents a developed prototype of a dynamic fish feeder based on fish existence. The dynamic fish feeder is programmed to feed where sensors detected the fish's existence. A microcontroller board NodeMCU ESP8266 is programmed for the developed h

The Yemen Kings and gaverners allered notable services to the pilgrims, who
were in their way to perform the pilgrimage to Mecca. Among them Al-Hysen Ibn
Salama (dead 384, Aih). The governer of Al- Zeadiea state, who concern about
pilgrimage route from its beginning at Hudrumot to its end at Mecca Al Makruma, the
distant was estimated by 60th days to pass the way he also eastablished asystem of
water “artesian wells” as long as the pilgrimage way also setting up large Mosqeses
and Marking out the way of the caravans of pilgrimage to save these caravans from
lossing the right way, he setting up under ground water chanal started from Arafat to
holy Mecca in order to ensure water supplies for the erea. This proje