النشر العلمي


Biodegradable polymers have been used in biomedical applications generally, and in tissue engineering especially, due to good physical and biological properties. Poly-epsiloncaprolactone (PCL) is a one of biodegradable polymers, which has a long time of degradation. But the mechanical properties, biodegradability and biocompatibility of the pure PCL cannot meet up with the requirement for some of the biomedical applications such as bone tissue engineering, for that many researches have established to focus on the modification of the PCL. In this review, different results on the fabrication of PCL for specific field of tissue engineering, tissue engineering incorporated in different PCL, surface modifications, blending with other polymers and their micro-porous structure are represented in brief outcomes. In addition dissolution of PCL in different organic solvents and the effect on their properties was attainable. Moreover, the physical and biological properties of PCL for different type of tissue engineering applications (hard and soft tissue) are obtainable.

published in review on advanced materials science

  • الفروق بين التلاميذ ذوي صعوبات التعلم في كل من الفهم السماعي، الذاكرة، القراءة واللغة المنطوقة وعلاقتها ببعض المتغيرات

ملخص البحث:

       هدف البحث إلى دراسة العوامل التي تقف وراء الفروق بين التلاميذ ذوي صعوبات التعلم في كل من الفهم السماعي والذاكرة، والقراءة واللغة المنطوقة لدى تلاميذ الحلقة الأولى بمرحلة الأساس في وحدة الشبارقة بمحلية مدني الكبرى، استخدم الباحث المنهج الوصفي مستعيناً بمقياس مايكل بست لفرز حالات صعوبات التعلم، وذلك لمناسبته لطبيعة البحث، اختار الباحث عينة  قوامها  (150) تلميذاً وتلميذة من حالات صعوبات التعلم بعد الفرز، حيث طبِّق عليهم البحث، وكانت أهم النتائج: أن المستوى الاجتماعي والاقتصادي للأسرة والنوع من العوامل المهمة التي تقف وراء الفروق بين التلاميذ ذوي صعوبات التعلم في النواحي الأكاديمية،  توجد فروق بين التلاميذ ذوي صعوبات التعلم في بُعد الفهم السماعي تعزى إلى المستوى الاجتماعي والاقتصادي للأسرة لصالح التلاميذ من الأسر مرتفعة المستوى الاجتماعي والاقتصادي، كما وجدت فروق بين التلاميذ ذوي صعوبات التعلم في الذاكرة  لمصلحة المنحدرين من الأسر مرتفعة المستوى الاجتماعي الاقتصادي، وأثبت البحث وجود فروق بين التلاميذ ذوي صعوبات التعلم في بُعد القراءة تعزى إلى النوع لمصلحة الإناث، ووجود فروق بين التلاميذ ذوي صعوبات التعلم في اللغة المنطوقة لمصلحة الذكور، إلى جانب عدم وجود فروق بين التلاميذ ذوي صعوبات التعلم في اللغة المنطوقة تعزى إلى المستوى الاقتصادي والاجتماعي للأسرة. أوصى الباحث بضرورة حصر التلاميذ ذوي صعوبات التعلم في محلية مدني الكبرى و إنشاء مؤسسة خاصة بهم تراعي اتباع الطرائق التعليمية المناسبة، العمل على تدريب المعلمين في المدارس العادية على الأساليب التربوية للتعامل مع التلاميذ ذوي صعوبات التعلم، إلى جانب توعية المجتمع بماهية صعوبات التعلم، وضرورة الاعتناء الخاص بذوي صعوبات التعلم بأنواعها المختلفة.

published in مجلة كلية العلوم الاجتماعية بجامعة البليدة

  • Valid Inequalities for Unrelated Parallel Machines Scheduling with Precedence Constraints

This paper deals with the mathematical modeling of
a scheduling problem for unrelated parallel machines with precedence
constraints in order to minimize the makespan (Cmax).
This study was motivated by the quality of the Integer Program
based on the interval graph. Three families of inequalities are
proposed. The first two inequalities based on the idea of the
precedence jobs and the third based on the shortest processing
time(SPT). We studied the validity of the new inequalities and
strength them by checking the linear combination. After an
exhaustive computational and statistical analysis we can conclude
that the addition of these inequalities decreases the computational
requirements to obtain the optimal solution in many cases.

published in CoDIT'16




Sorghum is the main staple food in Sudan, especially in rural areas. The uncertainty in sorghum production is attributed to that most sorghum is produced under rain fed sector with rainfall usually differs from year to year and exposes sorghum to risk and fluctuations in yield and production. The aim of this paper is to analyze sorghum performance under climate change and increasing world market prices. The economic performance of the country depends on weather conditions especially rainfall, between the mid1970s and late 2000s, summer rainfall decreased by 15 to 20 percent across many parts of the Sudan. This study has developed a single-market model for sorghum in Sudan, the model embodied important characteristics of agriculture in Sudan including the dependency of agricultural supply on rainfall. The sorghum market has been simulated by calibrating supply and demand functions. The model has introduced stochastic variables which are prices and rainfall; it has also incorporated food security indicators, which are directly affected by the agriculture performance. The uncertain (Stochastic) variables in the model are presented in their probability distribution functions by the help of BestFit; a software within the @Risk program. The final results could be graphed in the form of cumulative distribution function (CDF). The model scenario simulations revealed that, the impact of the decreasing trend of rainfall would overall lead to considerable losses to sorghum supply and hence a deterioration in the country’s external sector and food security situation.


Keywords: Sorghum, climate change, world prices, single-market model, Sudan

published in AFRICA BERLIN

  • Assessment of Knowledge and Practices about Nursing Management of Kwashiorkor Children Under Five Years at Wad Medani Pediatric Teaching Hospital, Sudan

Background :-

 Malnutrition is a serious health problem, most common in children under 5 years in the world . Kwashiorkor is a form of malnutrition, caused   by a serious deficiency of protein despite an adequate intake of energy.

Aim :

To assess pediatric nurses' knowledge and practices regarding  nursing management of kwashiorkor children under 5 years old at  pediatric Teaching Hospital in Wad Medani from 10 December 2009 to 10 May 2010 .


A descriptive hospital based  research study design was adopted for the study  from December 2009 to May 2010. The sample size consisted all available nurses (45 nurses working in different wards) that constituted during the period of study. Data was collected using a questionnaire to evaluate nurse's knowledge about the disease and its nursing management, also an observation checklist was used to assess nurse's performance in providing care to kwashiorkor children.  The data   collected  were analyzed  and interpreted by statistical package for Social Sciences using SPSS.


The findings revealed that the most 39 (72.9) of them knew the forms of kwashiorkor, clinical signs and the factors that predispose to kwashiorkor, regarding the performance the mean scores of performance (53.3% )  in measuring vital sign, growth monitoring, changing of nasogastric tube, management of hypothermia and assessment of patients' general condition..


The study attempts to determine knowledge and practice of nursing staffs regarding   the care  of kwashiorkor child . According to the information of the respondents  the pediatric nurses need more training programs in service education in relation to care of malnutrition especially kwashiorkor. A log book should be designed to provide knowledge about the weakness of services for management of kwashiorkor patients'  and took action to improve quality of care and similarly guidelines protocols for nurses' must be available in the unit.

Key Words: knowledge .kwashiorkor practice.

published in Imroving Clints Outcomes Through Implications of Scientific Evidences

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