ملخص

الانتـولوجي لوصف المكونات الاساسية لمصادر المعلومات المختلفة، التي أصبحت القضية الاساسية لاسترجاع والوصول الذكي الي المعلومات، الانتولوجي كمواصفات واضحة تكون واسعة الاستخدام في العديد من التطبيقات، لدعم علم دلالات الالفاظ "سيمانتك" ولإعطاء نماذج غنية المعني من الواقع. مجال الانتولوجي كـ تطبيق ناشئ جديد يمتلك امكانيات كبيرة في اعطاء مواصفات واضحة لنموذج المعرفة.

 نظام تمثيل المعرفة الذي يعتمد على منطق الوصف يكون قادر علي انجاز أنواع مختلفة من التفكر ويركز عادتاً على طرق لإعطاء مستوي عالي من توصيف العالم الذي يمكن ان يستعمل بفاعليه لبناء تطبيقات ذكية.

تفكر الوصف المنطقي ينجز خدمات الاستدلال، كحساب استدلال الفصائل الام من الفصيل، تحديد  مكونات الفصيل من عدمه. معظم التقنيات المتاحة من التفكر الوصف المنطقي يكون RACER , FaCT, FaCT++, Pellet.

في هذه الورقة استعملنا مصطلح (منطق الوصف) كلغة شكلية لتمثيل المعرفة والتفكر حول مجال اهتمامنا  "مجال التمور".

Abstract

 Ontologies to describe the basic contents of different information sources has become the key issue to intelligent retrieval and access of information.

Ontologies, as an explicit specification, are widely used in many applications to support the semantics and to provide a richer model of reality. Domain Ontology as an emerging new discipline has a great potential in providing such explicit specification to knowledge model.

     A knowledge representation system based on Description Logic is able to perform specific kinds of reasoning and usually focused on methods for providing high-level descriptions of the world that can be effectively used to build intelligent applications.

A Description Logic reasoner performs various inferencing services, such as computing the inferred super classes of a class, determining whether or not a class is consistent. Some techniques of the popular Description Logic reasoners available are as RACER , FaCT, FaCT++, and Pellet.

  In this paper, we mainly use the term "description logic" (DL) as a formal language for the representation knowledge and reasoning about the domain of interest ' Tommor Domain '.

Key Words : Ontologies, knowledge model, description logic reasoners, inferencing services , intelligent applications , Tommor Domain

Abstract

This paper attempted to conduct a critical analysis of Donald Trump’s inauguration speech in 2025. The speech was analysed through Van Dijk’s socio-cognitive approach. Three levels of analysis were employed: textual, cognitive, and social. The findings revealed that Trump employed several rhetorical appeals, including logos and pathos. Additionally, various rhetorical devices such as hyperbole, metaphors, and parallel structures were utilised to reinforce his ideas. The analysis also revealed underlying ideologies within the speech, including nationalism, inequality, and protectionism. Trump depicted Americans as law-abiding citizens, while he portrayed immigrants as criminals posing a serious threat to America. Furthermore, Trump effectively employed linguistic tools and rhetorical devices to characterise Biden’s administration as weak and incompetent in managing social and economic issues, while presenting himself as a redeemer of America.

Abstract— In order to better control the 3-DOF helicopter model, this work is constructed to fulfill and satisfy high performance requirements while taking robustness, reference tracking, and actuator effort into consideration. As a result, the helicopter model dynamics were modeled and shown in a state-space for the first time utilizing the system identification technique. MATLAB was used to identify, design, and simulate the H∞ controller for the nonlinear system. This ideal controller, known as LQG (Linear Quadratic Gaussian), was created, modeled, and applied to the actual model for the nonlinear system using MATLAB. Both controllers' outcomes were displayed. An explanation of the fundamental distinctions between the H∞ controller and the LQG controller is also provided.

Keywords— H∞ controller, LQG controller, 3-DOF helicopter model, MATLAB/SIMULINK

Free-space optical communication (FSO) is an innovative technology that uses light rays to transmit data over the air, providing a wireless alternative to traditional cables. However, the performance of this system is greatly affected by severe weather conditions such as fog, rain, humidity, and atmospheric turbulence, which degrade the quality of communication and pose challenges that require precise solutions. This paper aims to analyze the impact of these environmental factors on the performance of the FSO system using three main criteria: the bit error rate (BER) to evaluate the accuracy of data transmission, the signal-to-noise ratio (SNR) to assess the quality of communication, and the total attenuation induced by each atmospheric condition to quantify its effect on signal degradation. The On-Off Keying (OOK) modulation technique was adopted due to its simplicity and widespread use in optical communication systems. Using MATLAB, simulation models representing different weather scenarios were employed to analyze the performance of the FSO system under varying environmental conditions. The effects of atmospheric changes on system behavior are studied and evaluated to gain a deeper understanding of its operation and limitations. Also, in this paper a further enhancement is introduced to the system by integrating Multiple-Input Multiple-Output (MIMO) technology to improve its performance under challenging conditions as a solution.