This research presents new procedures to calculate the aggregates weight and the water requirement to realize a controlled concrete mixing design, where the aggregates proportion is defined by numerical method according to referential curve draw as r
eferring to the proposed fine aggregate ratio and the required water will be calculated as referring to the aggregates surface area. The results showed the facility and the reliability of the proposed design procedures.
In this paper, comparisons between several mathematical interpolation methods applied on high accuracy and huge laser clouds which only represents the DTM. In order to implicate the aforementioned, a group of a variety of Laser Scanned Areas has been
chosen to represent different types of terrain including complex and flat terrain, taking into account that man-made features are not involved in this study and that different Laser Clouds density is used to make the study more general.
A different set of algorithms were applied to conclude which one is more suitable. This step was followed by the comparison between different interpolation results. The results have shown that the Points'
Density has a great impact on a manner in which the optimal interpolation method is applied.
Moreover, it has proven that the Nearest Neighbor Algorithm is the best applied method compared with the other alternatives
Fresh water is considered as a top priority concern that captures Syria because of limited
water resources and high rate population growth (2.52%). This paper focuses on virtual water
concept and studies the possibility of utilization it in agricul
tural sector, and calculate the water
balance of Syria accurately. The virtual water volume was calculated for most of the crops that
are planted in Syria and the total water footprint and its indicators were calculated. A
mathematical optimization model is developed for the selection of the cropping patterns
distribution in Syria that use water with higher efficiency and better economic income, and
minimize the food gap by offering two scenarios. As a findings of this research, the food demand
was not covered completely but mostly because of water shortage, and the food gap value was
decreased in the first scenario from 10950 million Syrian pounds to 9850 million Syrian pounds
and to 5100 million Syrian pounds in the second scenario because of the productivity
improvement of some crops and the increase in the production of some crops (wheat, maize)
which are the main crops in food balance.
This study is devoted to the durability of bituminous mixtures,
including the effects of different gradations, compaction
temperatures and immersion time on the durability potential of
mixtures.
In this paper we study some classes of partially pseudo symmetric contact
three-manifolds .
In sections 3 −1 and 3 − 2 we find necessary and sufficient conditions for
a contact metric three-manifolds to be partially pseudo symmetric of the first
and second type respectively .
مازالت طرائق اختبار المقاومات للخرسانة بالطرق اللاتخريبية تعدُّ طرقاً غير مباشرة. و نظراً لعدم
وجود مفهوم واضح و عام و ثابت لمقاومة الخرسانة فإن طريقة العينات الأسطوانية أو المكعبية تعد
أيضاً طريقة غير مباشرة لقياس المقاومة الهندسية، و انطلاقاً من
ذلك يتخصص هذا العمل كمحاولة
علمية تجريبية جادة لتطوير العلاقات الحسابية للحصول على أدنى و أصغر خطأ ممكن للقراءات
باختبار المطرقة الخرسانية الارتدادية مع مقارنة حقيقية واقعية لمقاومات الخرسانة ذاتها من خلال
اختبار عينات خرسانية مكعبية من منشآت منفذة و مراقبة من قبلنا و بشكل موازٍ.
هدف هذا البحث هو دراسة السيراميك السوري وفق المواصـفة القياسـية السـورية رقـم
520/1987 و 521/1987 و لتحديد هل أصبح إنتاج السيراميك السوري ضمن المواصـفات
المطلوبة من حيث النوعية في سبيل منافسة السيراميك الأجنبي، و لا سيما أن سورية تسـتعد
للدخول في
اتفاقية المنظمة العالمية للتجارة الدولية (الغات).
بعد توقيع هذه الاتفاقية فإنه لا مكان للمنتجات و السلع التي لا تتطابق مع المواصفات القياسية
العالمية، لذا من الضروري الاتجاه نحو مراقبة الجودة للمنتجات الوطنية السـورية و تحسـين
نوعيتها لتكون قادرة على منافسة منتجات البلدان المتقدمة في الغات.
لوحظ من نتيجة هذه الدراسة أنَّ منتجات الصناعة السورية مطابقـة للمواصـفات العالميـة
و منافسة للسلع و المواد و المنتجات العالمية، و هناك إمكانية لتصدير هذه المنتجـات للأسـواق
العالمية.
إن بعض أجهزة قياس الغزارة التي تعتمد في عملها على قياس تواتر الدوامات التي تتشكل خلف حاجز
مغمور في السائل تكون كثيرة الدقة عندما يتم قياس تواترها عن طريق قياس عدد الدوامات التي تؤثر
في صفيحة مستوية متوضعة ضمن السياج المتشكل خلف الحاجز.
و بذلك نستط
يع اعتماد عدد ستروهال جديد ثابت مستقل ليس له علاقة بنسبة التضـايق
و لقـد درست الخصائص المميزة لهذا الجهاز في الحالتين: الجريان المستمر و الجريان غير المسـتمر و هـذا
الجهاز يستخدم كجهاز قياس عددي.
The purpose of this research is to apply a mathematical program to
calculate water and chemical balance in unsaturated soils, under the
influence of different methods of irrigation, in order to monitor the
amount of vertical drainage of water insi
de the soil and choose a
irrigation method that can reduce the phenomenon of groundwater
pollution.
Three irrigation methods were tested with different fertilization
method. The study was conducted in the western part of Homs
Governorate (AlQusair orchards).
this
study a questionnaire was implemented as a primary procedure for
any methodology of risk management, and send out to the experts
who work in the field of construction, in order to evaluate the
reality of our projects as well as determine the
serious problems,
and all of this aim to form checklists including the major risks
which the our projects are facing to be as a guide for early risks
alert, to adopt the proper responses to deal with them.
