123 research outputs found
Al-Tayeb Bakush\u27s Methodology in his Book “Arabic Morphology Through Modern Phonology”
No full textكتاب الطيب بكوش من الكتب المهمة في مجاله اللغوي إذ قدم الصرف بطريقة علمية حديثة ناسبت فيها الدرس الصوتي الصرفي الحديث، تتبلور فكرة كتاب الطيب بكوش التصريف العربي في دراسة التصريف العربي على وفق نظرة حديثة صوتية دراسة لبعض موضوعات اللغة العربية الأشهر مثل الفعل وجميع ما يتعلق به من تصريف، والإسناد والبناء للمجهول، وأنواع الأفعال، على وفق التقسيمات المتعارف عليها، وهدفَ البحث إلى عرض الكتاب، ومنهج المؤلف، وآراءه الصرفية، ومناقشته لآراء العلماء.Al-Tayeb Bakush\u27s book is an important book in its linguistic field, as it presents morphology in a modern, scientific manner that is appropriate for modern morphological phonetic studies. The idea of Al-Tayeb Bakush\u27s book, Arabic Morphology, is crystallized in the study of Arabic morphology according to a modern phonetic perspective, examining some of the most famous topics in the Arabic language, such as the verb and all related morphological inflections, attribution and the passive voice, and verb types, according to conventional classifications. The aim of this research is to present the book, the author\u27s methodology, his morphological views, and his discussion of the views of scholars
The Narration Method Of “Story Speech” In The Novel “Mawsim Al-Hijraila Al-Shamal”(Seasons Of Migration To The North) By Tayeb Salih
No full textThe speech of characters is one of the important elements of story as it defines the thoughts of the story and it can promote the events of story. A narrator transfers the speech from the author to the reader and it is manifested as “The narration methods of story speeches”. The story speeches are dived into five groups as direct, indirect, free direct and free indirect and narrative report. In the famous novel “Mawsim al-Hijraila alShamal” by “Tayeb Salih”, contemporary Sudani author, the mentioned methods are manifested based on narrative situation of story. The story is started with the first-person view and the narrator presents the report and other methods are dominant as the characters are increased. The present study is a descriptive-analytic design showing that the direct speech is highly frequent in the novel.</jats:p
Colonialism and sexuality, in Tayeb Salih’s season of migration to the north and Peter Kimani’s dance of the Jakaranda.
Get PDFAbstractThe Sudanese author, Tayeb Salih’s Season of Migration to the North and the Kenyan author, Peter Kimani’s Dance of the Jakaranda both interrogate the connection between colonialism and sexuality in an African setting. While the protagonist in Salih’s novel, Mustafa Sa’eed is the epitome of the sexualized, colonized Sudanese subject, Kimani’s novel examines several sexual relationships, including those of Sally McDonald, the British wife of a colonial administrator in Kenya, Ian McDonald. In Kimani’s novel, Sally McDonald represents a counter image to the white woman in need of protection from the sexual appetites of colonized males. Though Salih’s narration exemplifies the colonial stereotype of the hypersexual black male through Sa’eed’s sexual exploitations of British women, it is also a critique of colonial rule and of responses to colonial rule in Africa. However, Kimani’s critique of colonial rule calls into question the notion of the colonized male without sexual control by making Sally McDonald, the image of sexual license. It is in this vein that this article explores the commonalities between the two novels and the way they use sexual exploitation by opposing figures within colonial settings to address different responses to colonial rule
Frequency analysis of stator currents of an induction motor controlled by direct torque control associated with a fuzzy flux estimator
Get PDFIntroduction. The best way to control the torque of an induction motor is conventional direct torque control (DTC); this control method is the most used approach in the industrial sector due to its many advantages. Its main advantages are its simplicity and its exclusive dependence on the stator resistance of the induction motor. However, the use of hysteresis comparators reduces its effectiveness, causing more torque ripple. Additionally, this results in variable operating frequency and limited frequency sampling, resulting in pseudo-random overshoot of the hysteresis band. Purpose. For these reasons, this article presents a new study aimed at confirming its shortcomings and improving the effectiveness of the control. Novelty. We propose to use fuzzy logic methods to estimate the two components of the stator flux. Methods. In traditional DTC the flux components are estimated from an equation relating the stator resistance to the stator voltage and current. In the proposed method, only stator currents and voltages are used for this evaluation, which eliminates the dependence of DTC on stator resistance. The aim of this proposal is to make DTC robust to parametric changes. Results. General harmonic distortions, rotational speed of the induction motor, electromagnetic moment, magnetic flux and stator currents are analyzed. Practical value. With this proposed technique, validated in Simulink/MATLAB, several improvements in motor behavior and control are endorsed: torque fluctuations are reduced, overshoot is completely eliminated, and total harmonic distortion is significantly reduced by 48.31 % for stator currents. This study also confirmed the robustness of DTC to changes in stator resistance.Вступ. Найкращим способом управління крутним моментом асинхронного двигуна є традиційне пряме управління крутним моментом (DTC); цей метод управління є найбільш використовуваним у промисловому секторі через його численні переваги. Його основними перевагами є простота та виключна залежність від опору статора асинхронного двигуна. Однак використання гістерезисних компараторів знижує його ефективність, викликаючи велику пульсацію крутного моменту. Крім того, це призводить до зміни робочої частоти та обмеження вибірки частоти, що призводить до псевдовипадкового виходу за межі смуги гістерезису. Мета. З цих причин у цій статті представлено нове дослідження, спрямоване на підтвердження його недоліків та підвищення ефективності контролю. Новизна. Ми пропонуємо використовувати методи нечіткої логіки з метою оцінки двох компонентів потоку статора. Методи. У традиційному DTC компоненти потоку оцінюються за рівнянням, що зв'язує опір статора з напругою та струмом статора. У запропонованому методі цієї оцінки використовуються лише струми і напруги статора, що виключає залежність DTC від опору статора. Мета цієї пропозиції – зробити DTC стійким до параметричних змін. Результати. Аналізуються загальні гармонічні спотворення, швидкість обертання асинхронного двигуна, електромагнітний момент, магнітний потік та струми статору. Практична цінність. За допомогою цього запропонованого методу, перевіреного в Simulink/MATLAB, підтверджено кілька покращень у поведінці та управління двигуном: коливання крутного моменту зменшуються, перерегулювання повністю усувається, а загальні гармонічні спотворення значно зменшуються на 48,31% для струмів статора. Це дослідження підтвердило стійкість DTC до змін опору статора
Modelling, Simulation and Fuzzy Self-Tuning Control of D-STATCOM in a Single Machine Infinite Bus Power System
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Background:
In recent years, demand for electricity has increased considerably, while the
expansion of generation and transmission has been very slow due to limited investment in resources and
environmental restrictions.
Methods:
As a result, the power system becomes vulnerable to disturbances and instability. FACTS
(Flexible AC Transmission Systems) technology has now been accepted as a potential solution to this
problem. This paper deals with the modelling, simulation and fuzzy self-tuning control of a DSTATCOM
to enhance the stability and improve the critical fault clearing time (CCT) in a single
machine infinite bus (SMIB). A detailed modelling of the D-STATCOM and comprehensive derivation
of the fuzzy logic self-tuning control is presented.
Results:
The dynamic performance of the power system with the proposed control scheme is validated
through in a simulation study carried out under Matlab/Simulink and SimPowerSystems toolbox.
Conclusion:
The results demonstrate a significant enhancement of the power system stability under the
simulated fault conditions considered.
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TRANSLATING TAYEB SALIH’S PSYCHOLOGICAL TRAUMA AS REPRESENTED IN HIS NOVEL SEASON OF MIGRATION TO THE NORTH: A SEARCH FOR BELONGINGNESS
No full textTayeb Salih, a prominent British author of Arabic language and origin is regarded as a pioneer who carved an identity of African-Arab literature globally. Salih acclaimed in one of his interviews in the Arabic press that he attempted to reshape the East and West relationship conceived by the world. He stated that the West romanticizes the idea of the East-West interaction merely as an emotion whereas it is an unresolved conflict that leads a trauma related to loss of identity, belongingness, and existentialism (Salih, 1929). Denys Johnson-Davies, an accredited translator, credited with making Arabic literature accessible to readers of the English language, who also translated Salih’s Season of Migration to the North (1966) regards the author and this literary piece as an intelligent work on East-West conflict produced by any Western or non-Western author. Season of Migration to the North provides a tapestry of events, multi-layered interpretations, traumatic outbreaks, struggles to identify with the world and finally succumbing to the pain. It is not a simple story of physical migration and the life of an African on the European land. It is an embodiment of an emotional, spiritual, religious, and mental search for belongingness. This present research is an attempt to capture the journey of the protagonist Mustafa Saeed and his life from his birth as a slave in the then colony of Britain, Sudan to his migration to Britain as a free individual. The rollercoaster of events that shape him and his destiny. Did he manage to break the clutches of his birth and slavery? Did he attain freedom from his belongingness to a British colony? Did he get peace to fly away from his roots is what makes this novel an extremely viable research material. The authors attempt to explore the psychological trauma and translate the author’s search for belongingness and understand the East-West relationship from his perspective
Power management and control strategies for off-grid hybrid power systems with renewable energies and storage
Get PDFThis paper presents a simulation study of standalone hybrid Distributed Generation Systems (DGS) with Battery Energy Storage System (BESS). The DGS consists of Photovoltaic (PV) panels as Renewable Power Source (RPS), a Diesel Generator (DG) for power buck-up and a BESS to accommodate the surplus of energy, which may be employed in times of poor PV generation. While off-grid DGS represent an efficient and cost-effective energy supply solution particularly to rural and remote areas, fluctuations in voltage and frequency due to load variations, weather conditions (temperature, irradiation) and transmission line short-circuits are major challenges. The paper suggests a hierarchical Power Management (PM) and controller structure to improve the reliability and efficiency of the hybrid DGS. The first layer of the overall control scheme includes a Fuzzy Logic Controller (FLC) to adjust the voltage and frequency at the Point of Common Coupling (PCC) and a Clamping Bridge Circuit (CBC) which regulates the DC bus voltage. A maximum power point tracking (MPPT) controller based on FLC is designed to extract the optimum power from the PV. The second control layer coordinates among PV, DG and BESS to ensure reliable and efficient power supply to the load. MATLAB Simulink is used to implement the overall model of the off-grid DGS and to test the performance of the proposed control scheme which is evaluated in a series of simulations scenarios. The results demonstrated the good performance of the proposed control scheme and effective coordination between the DGS for all the simulation scenarios considered
The Wedding of Zein: Islam through the Modern Novel
No full textA critical study of a novella by the Sudanese author Tayeb Salih as well as an exploration of its relevance for an understanding of Islam. The study was based upon the original in Arabic and northern Sudanese dialect. --author-supplied descriptio
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