شخصية الصحابة في شعر صدر الإسلام

The literature represents the nation’s treasure of poetry and prose and its original heritage. It is the outcome of minds believe fully in its right to develop along with other nations. Poetry is one of the fields of heritage which observe human activity in the Arab environment and records the nation’s deeds everywhere by its pure tongue. For all these reasons it is concluded that the poetry which was generated with the advent of Islam especially the poetry of the prophet’s honorable companions who represented the first generation in Islam who were imparted education in Prophet’s school. This subject of research appealed to know their ideas in their poetry. In this regard, poetical works of poets of the early stage of Islam was started. The research consists of a preface, two objects of research and a conclusion. In the first object of research it has been discussed the introduction of the Prophet’s companion’s personality, concerning linguistically, technical and conceptual views, their attitude, and the nature of his role in the call for Islam, their role in learning Holy Qur’an by heart, Islam and honorable Prophet’s attitude towards poetry and poets. Whereas the second object of research is, it has been discussed the sensual ideology aspect in one topic such as, Jihad.

Proactive Strategies to Improve Link Stability under Topology Changes in Mobile Adhoc Networks

Improving link stability under topological changes arise due to link/node failures under uniform speeds and random trajectories of mobile nodes, is a significant problem that mustbeaddressedtoimproveroutingperformanceinmobileadhocnetworks(MANETs). Under random characteristics of wireless channels, there must be a unified model based on proactive strategies to improve link stability under topological changes for stable and robust communications among neighboring nodes. This thesis addresses the problem of linkstabilityundertopologicalchangesbypresentingproactivestrategiesforfasterfailure detection, robustly maintaining link stability, effective link stability estimation, and efficient traffic estimation. First, a novel faster failure detection (FFD) strategy is proposed for link re-connectivity under link/node failures using a Hello messaging scheme. FFD is modeled through a Continuous Time Markov Chain (CTMC) based approach to proactivelydetectlink/nodefailuresundertopologicalchangesinMANETs. TheFFDstrategy minimizes delay incurred as a result of link re-connectivity, optimizes adjacency establishments among neighboring nodes, and enables energy efficiency to improve network connectivity. Second, a novel dynamic link connectivity (DLC) strategy for maintaining link stability among neighboring nodes. DLC is modeled through CTMC by taking into account continuous time analysis of dynamic link connectivity and stationary probability distribution between neighboring node pairs. The DLC strategy examines stability of network nodes and calculates probabilities of connection and disconnection states on the basis of transition rate estimation between these states. The DLC strategy robustly maintainslinkconnectivityforfuturecommunicationsamongneighboringnodesinsideacluster. Third, novel link connectivity metrics (LCM) and path distribution analysis (PDA) strategiesarepresentedforeffectivelinkstabilityestimationinMANETs. LCMandPDA are modeled using CTMC under random movement of network nodes and topology trig xxii geredpathdurationstatisticsasafunctionofeffectivelinkstabilityestimation. TheLCM and PDA strategies collectively enhance robustness and stability of a network by making it less prone to connectivity failures for future communications among network nodes. Finally, the fourth contribution is a novel efficient traffic estimation (ETE) strategy using Hello messaging among neighboring nodes inside a cluster. ETE is modeled through periodic exchange of transmitted Hello messages under local link connectivity between neighboring node pairs, which follows a CTMC model. The ETE strategy estimates optimum Hello messages traffic through local link connectivity. Simulation and analytical results demonstrate that the proposed strategies improve link stability under topological changes and can be deployed as effective tools for maximizing routing performance in MANETs.