https://repository.sustech.edu/handle/123456789/22978 2026-04-11T20:27:13Z 2026-04-11T20:27:13Z Elnour Ahmed, Mohamed Mustafa M.S. Esmail, Abdelhamid https://repository.sustech.edu/handle/123456789/23755 2019-11-12T08:36:31Z 2019-11-12T00:00:00Z

The importance of Training on Engineering Control of Hazardous Materials Using Pilot Plant Elnour Ahmed, Mohamed Mustafa; M.S. Esmail, Abdelhamid This study illustrates how Jubail Technical Institute successfully integrated different empowerment training principles into the teaching methods and curriculum of an Industrial safety training program. The 8 months follow-up survey involved local industries respondents, each representing a separate plant site, a group of trainees, staff members and graduates of the chemical skills department. The evaluation shows that 93.3% of the teaching staff believe that the competency based training method is one of the best ways to help the technician in how to control risk using pilot plant, compared to other well-known training methods. 75% of the graduates confirmed that training using pilot plant is the best method of training in engineering control of the risks of chemical processes compared to theoretical training or training using models. 93% of the trainees emphasized that the training in engineering control of the risks of chemical processes at the institute and before graduation helps to understand the risk control processes. 20% of the industrial sector confirms that the costs of training in engineering risk control in petrochemical plants are higher than other risk control methods. The data substantially supported the importance of Training in Engineering Control of Hazardous Materials Using Pilot Plant.

2019-11-12T00:00:00Z احمد ادم, ابراهيم https://repository.sustech.edu/handle/123456789/23338 2019-09-22T11:16:09Z 2019-09-22T00:00:00Z

تكامل مخرجات نموذج مونتكارلو و سلوك مدراء مشاريع التشييد فى السودان Integrating Monte Carlo Simulation Outputs and Construction Project Managers’ Behaviors in Sudan احمد ادم, ابراهيم لوحظ أن مشاريع المستثمرين و مؤسسات صناعة التشييد السودانية تعمل فى بيئة إقتصادية و سياسية و إجتماعية محفوفة بالمخاطر التى تؤثر على معدلات نموها أو تعثرها و إنهيارها. كذلك لوحظ إفتقار مدراء مشاريع التشييد إلى مقدرات تمكنهم من إدارة مخاطر المشاريع بطريقة ممنهجة. يهدف هذا البحث إلى قياس ألفجوة بين مقدرات المستجيبين و مستوى المقدرات المتوقع لإدارة مخاطر المشاريع الكمية بفاعلية. تم تصميم إستبيان لجمع معلومات و بيانات حسب متطلبات أهداف المشروع و إستعملت تقنية تقدير النقاط الثلاثة لإنشاء جداول زمنية يقينية لمشروع إفتراضى. وجد أن الفجوة بين مستوى مقدرات المستجيبين و مستوى المقدرات المتوقع لديهم كبيرة و أن المستجيبين لا يستطيعون تخطيط و إدارة مخاطر المشاريع الكمية بفعالية و أن كل المستجيبين يستعملون التحليل اليقينى فى إدارة زمن المشروع و لا يستعملون الحلول الاحتمالية. تم تحليل مشروع إفتراضى بواسطة تقنية مونتكارلو لتوضيح أثر المخاطر الكلية على زمن المشروع و الاتفاق على زيادة إحتياطى زمنى محدد. كذلك لوحظ تغيير خط المسار الحرج ليدلل على ديناميكية خط المسار الحرج. أخيراً، أوصى الباحث بتدريب المستجيبين و مدراء مؤسساتهم فى مجال علم إدارة مخاطر المشاريع.

2019-09-22T00:00:00Z Sulaiman Ahmed, Nasreldeen Ahmed Gamal Eldin, Tawfig Osman, Hassan https://repository.sustech.edu/handle/123456789/23257 2019-09-08T10:46:03Z 2019-09-08T00:00:00Z

Casing Failure Analysis for API N-80 Grade in Sudanese Thermal Oil Recovery Production Wells: Case Study Sulaiman Ahmed, Nasreldeen; Ahmed Gamal Eldin, Tawfig; Osman, Hassan Implementation of the Cyclic Steam Stimulation (CSS) and Steam Flooding as thermally Enhanced Oil Recovery (EOR) methods increase the commercial value of the existence Field through increasing oil recovery and field extension. When the steam is generated, processed and injected with high peak temperature into shallow wells (total depth of 700m) for oil recovery, it may result in high thermally induced stresses, which might exceed its design limit of the material and lead directly to the plastic deformation in the casing and thread connection. The objective of this paper is to premineraly investigate and analyze the reasons behind the casing failure in some well candidates at Fula North East (FNE) thermal oilfield based on the analytical analysis targeting the related structural and operational aspects of these applications. There are several casing failures have been reported; but so far no enough evident to correlate these failures to the mentioned stresses. Therefore, Ensuring adequate structural integrity and seal ability of the connections over the full service life of a thermal recovery well is a significant challenge. In this work, the Root Cause Analysis (RCA) on premineraly manner has been used through correlation of the problem to casing’s grade and materials, cement formulation, sand production and steam injection parameters and thermal insulation process, by using step by step methodology. The results show that some supporting measures are recommended in order to minimize the casing damage and extend the life time of the thermal wells in FNE oil field. The above mentioned methodology has been used as the first time in Sudan to analyze casing failure in thermal oilfield

2019-09-08T00:00:00Z M. Gaddoura, Omer Omara, Akram M. Alromema, Arkan Wan, Suiren https://repository.sustech.edu/handle/123456789/23134 2019-08-20T10:24:58Z 2019-08-20T00:00:00Z

Reconstruction Algorithm for Sound Speed Distribution in the Female Breast M. Gaddoura, Omer; Omara, Akram; M. Alromema, Arkan; Wan, Suiren - In the last few years, Ultrasound Computed Tomography (USCT) techniques has become an attractive and hot research area. Herein, we present a robust iterative USCT reconstruction algorithm, which based on bent ray theory. The object to be imaged is encircled by uniformly distributed transducers, whereas one transducer acts as a transmitter and the remains work as receivers. The travel-time measurements can be used to estimate the sound speed distribution by solving a nonlinear system of equations. Our proposed scheme is based on the straight ray approximation, which is valid for breast ultrasound tomographic imaging. On this basis, we have formulated a cost function that defines the difference between the measured first arrivals and those calculated for a given velocity model in the least squares sense. Then, the sound speed image can be obtained by finding the best solution which minimize this difference. Our method is able to resolve very fine details even in very complex structured objects. The presented results approve the accuracy and robustness of our approach for breast screening applications

2019-08-20T00:00:00Z