325 research outputs found
On Certain Class of Analytic Functions Related to Cho-Kwon-Srivastava Operator
No full textMotivated by a multiplier transformation and some subclasses of meromorphic functions which were defined by means of the Hadamard product of the Cho-Kwon-Srivastava operator, we define here a similar transformation by means of the Ghanim and Darus operator. A class related to this transformation will be introduced and the properties will be discussed
On certain class of analytic . . .
No full textMotivated by a multiplier transformation and some subclasses of meromorphic functions which were defined by means of the Hadamard product of the Cho-Kwon-Srivastava operator, we define here a similar transformation by means of the Ghanim and Darus operator. A class related to this transformation will be introduced and the properties will be discussed
The effect of abstraction of the script in the emergence of Quranic recitations according to Orientalists
No full textيناقش هذا البحث ما ذهب إليه عدد من المستشرقين من أن أصل القراءات القرآنية يرجع إلى تجرد الخط الذي كُتِبَتْ به المصاحف الأولى من نقاط الإعجام وعلامات الحركات. وجاء في أربعة مباحث: ناقشت في الأول ظاهرة تجرد خط المصاحف الأولى من العلامات، وثَمَّ تعليلان لذلك، الأول: ليحتمل الخط القراءات، والثاني: أن الخط لم تكن فيه تلك العلامات. وعرضت في الثاني نظرية المستشرقين في نشأة القراءات، والتي تتلخص في أن القراءات ناشئة عن تجرد خط المصاحف، وتوقفت عند أبرز القائلين بها، لا سيما المستشرق المجري جولد تسيهر، الذي عزا نشأة القراءات لتجرد الخط، والمستشرق الألماني برجشتراسر الذي قام بتحليل ظواهر القراءات، وانتهى إلى أنه لم يحدث في القراءات السبع إلا استفادة محدودة من الحرية الكبيرة التي أتاحها تجرد الخط من نقاط الإعجام وعلامات الحركات. وعرضت في الثالث وجهة نظر المصادر الإسلامية في أصل القراءات، والتي تتلخص في أنها نتجت عن رخصة الأحرف السبعة، وأن القراء المشهورين الذين تنسب إليهم القراءات أخذوها عن التابعين عن الصحابة، ولم تكن اجتهادًا منهم. وفي الرابع وازنت بين وجهتي النظر في أصل القراءات، وانتهيت إلى أن الاختلاف بين القراءات ليس كالاختلاف في قراءة النقوش القديمة، فليس ثم علاقة بين كاتب النقوش وقارئها، ومن هنا جاء الاختلاف في قراءة كلماتها، أما المصحف فهو محفوظ في الصدور قبل أن يُدَوَّنَ في السطور، وكانت القراءات معروفة قبل كتابة المصاحف، فكيف تنشأ عن خطها؟!The Impact of Un-dotted Arabic Calligraphy in the Emergence of the Variant Readings of the Qur’an: The Orientalists’ Views. This paper responds to suggestions by orientalists that the origin of variant Qur’anic readings is due to the lack of dots and signs in the first copies of the Qur’anic script. The paper is divided into four sections. In the first section, I discuss the stripping of the initial copy of the Qur’anic script of marks and other signs. I also discuss the two commonly proffered explanations. Secondly, I discuss the theories of the orientalists regarding to the origin of the readings (i.e., that they stem from the un-dotted Qur’anic script), whereby I concur with the most prominent view, particularly as represented by the Hungarian orientalist Goldziher, who attributed the emergence of the readings to un-dotted Arabic calligraphy. I also respond to Berjtsrar, the German orientalist who analyzed the variant readings and concluded that the seven readings are little affected except for a limited benefit gained from the extended freedom afforded by the absence of the dots and vowel signs. In the third section, I present my view based on Islamic sources regarding the origin of the variant Qur’anic readings, which could be summarized as follows: the variant readings are the result of the notion of the “seven letters”. The famous reciters of the Qur’an to whom the readings are attributed had learned from the followers of the Companions, and thus they were not relying on their own initiative. In the fourth section, I try to balance the various views and conclude that the differences between the recitations are not the same as those in the readings of the ancient manuscripts for there is no relationship between the author of a manuscript and the one who reads it. As for the Qur’anic scripture, it was memorized before being written down, and the readings were known before the writing. Therefore, how could the variation arise from the script
On the Use of Feedforward Neural Networks to Simulate Magnetic Hysteresis in Electrical Steels
No full textThe present investigation aims at the definition of an efficient and robust neural network-based model to simulate the magnetic hysteresis in performing magnetic alloys suitable for aircraft applications. Starting from a set of measured hysteresis loops, a convenient and effective method to train the network consists to identify the Preisach model and use it for the generation of the training set. The obtained neural network turned out to be particularly robust and able to reproduce the behaviour of the Preisach model with a significant reduction of the computational time. The comparative analysis between the two approaches takes into account different kinds of excitation waveforms
A Study of a Certain Subclass of Hurwitz-Lerch-Zeta Function Related to a Linear Operator
No full textBy using a linear operator with Hurwitz-Lerch-Zeta function, which is defined
here by means of the Hadamard product (or convolution), the author investigates
interesting properties of certain subclasses of meromorphically univalent functions in the
punctured unit disk
Analytical formulation to estimate the dynamic energy loss in electrical steels: Effectiveness and limitations
No full textThis article aims to investigate the accuracy in modeling and characterization of the dynamic energy loss of modern laminated electrical steels in use for power electronics applications. Measurements by an Epstein Frame are performed in case of sinusoidal and non-sinusoidal waveform of the magnetic induction, at different frequencies and peak values. The Steinmetz and the time domain statistical loss theory, either in frequency domain are used, and the related parameters are fitted experimentally. The dynamic energy loss is also modeled and estimated by means of a finite element method (FEM) formulation in time domain, coupled with a vector Preisach model to represent the constitutive law of the magnetic material. The series of the results reported indicates effectiveness and limitations of the modeling approaches considered. Some considerations about the excess loss are also given
Majorization for certain classes of meromorphic functions associated with a family of integral operator
No full textArgument properties of certain classes of meromorphic functions related to Cho-Kwon-Srivastava operator
No full textNew Result of Analytic Functions Related to Hurwitz Zeta Function
No full textBy using a linear operator, we obtain some new results for a normalized analytic function f defined by means of the Hadamard product of Hurwitz zeta function. A class related to this function will be introduced and the properties will be discussed
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