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Article
DEVELOPMENT OF PC BASED MULTI-CHANNEL PROGRAMMABLE LOGIC ANALYZER

Authors: Sarmad Hassan Ahmed --- Ali A. Ati
Journal: IRAQI JOURNAL OF COMPUTERS,COMMUNICATION AND CONTROL & SYSTEMS ENGINEERING المجلة العراقية لهندسة الحاسبات والاتصالات والسيطرة والنظم ISSN: 18119212 Year: 2007 Volume: 7 Issue: 2 Pages: 43-63
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Abstract:This paper presents the design and practical implementation of a multi-channel PC based logic analyzer. The analyzer has16 input channels with memory depth of 4K snapshots/channel and capture rate of up to 5 MHz. The analyzer parameters such as internal or external trigger source, falling or rising edge capture clock, state or timing measuring mode, number of pre-trigger and post-trigger snapshots, are made to be programmable and could be changed manually. The analyzer prototype consists of hardware part represented by the development of the interface ISA card and the software part that involves the kernel mode driver and the GUI program development. The developed prototype analyzer has been tested under different configuration schemes using 8085 SDK.

الخلاصة:يقدم هذا البحث التصميم و التنفيذ العملي لمحلل منطقي متعدد القنوات باستخدام الحاسوب الشخصي. الجهاز المصمم يحتوي على 16 قناة إضافة إلى سعة خزن 4K snapshots/channel ومعدل اخذ إشارات يصل الى 5MHz . خلال التصميم تم مراعاة ان يكون الجهاز قابل لتغير خواصه من قبل المستخدم ، هذه الخواص تتضمن طبيعة مصدر التحفز داخلي أم خارجي ، نوع طور التشغيل ، وكذلك عدد الإشارات المأخوذة قبل وبعد حصول التحفز .تنفيذ الجهاز تضمن جزئيين رئيسيين : الأول هو الجزء البنيوي الذي يقوم بعملية اخذ الإشارات من القنوات وخزنها في الذاكرة الموجودة في الجزء البنيوي نفسه .، أما الجزء الثاني فهو الجزء البر مجي ويتكون من سواقة وواجه تطبيق للمستخدم تمكنه من استخدام الجزء البنيوي والسيطرة عليه، وكذلك عرض الإشارات المستلمة بطريقة ملائمة . تم اختبار النظام في مختلف طرق عمله وخواصه من خلال استخدام منظومة المعالج الدقيق 8085-SDK kit .

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Article
Improve the Process of Enhancing Oil Recovery (EOR) by Applying Nanomagnetic Cobalt Ferrite Nanoparticles

Authors: A.D. Thamir --- K.A. Sukkar --- Ali A. Ati
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2017 Volume: 35 Issue: 9 Part (A) Engineering Pages: 872-877
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

In this paper we reported nano-crystalline cobalt ferrite powders were synthesized using co-precipitation method at 600 °C, 700 °C and 800 °C. The structural, morphological and magnetic properties of the powders were investigated by x-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM) and vibrating sample magnetometer (VSM). Infrared spectral analysis data between 200 and 1000 cm-1 defined the intrinsic cation vibrations of the characteristic spinel structure system. The saturation magnetization (Ms) and coercivity (Hc) of the CoFe2O4 were found to be in the range of 94-33 emu/g, which is still in the range of hard ferrite. The observed variation in saturation magnetization, coercivity and remanence magnetization as a function of increasing the temperature and grain size of samples. From this point of view, nano-scale size of nanoparticles makes them efficient for using in borehole stability maintaining for enhancing oil and gas recovery efficiency improvement. The large value of magnetic pressure (-2.95699) are expected to be useful in oil recovery applications. It has also been found that the choice of nanoparticles for application in oil recovery depends on nature, magnetic and electric properties of the reservoir rock.

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