In a communication network with a source node, a multicast tree is defined as a tree rooted at the source node and all its leaves being recipients of the multicast originating at the source. The tree or bandwidth cost is normally measured by its utilization of tree links along with the quality of service measures such as delay constraint and end-to-end delay. However, if nodes are allowed to join or leave the multicast group at any time during the lifetime of (...) the multicast connection, then the problem is known as dynamic multicast routing problem. In this article, we combine a greedy approach with static multicast routing using Tabu Search to find a low-cost dynamic multicast tree with desirable QoS parameters. The proposed algorithm is then compared with several static multicast routing algorithms. The simulation results show that, on a large number of events, i.e., where nodes are leaving or joining, the proposed algorithm is able to find multicast trees of lower cost and more desirable QoS properties. (shrink)

The focus of our research has been the definitions of pleasure in Ibn Sīnā’s philosophy. For that purpose we worked on identifying the principles upon which this issue has been built. In this context we made a comparison between intellectual pleasure and sensual pleasure. We came to the conclusion that the former is better than the latter. This in turn helped us make the distinction between the pleasure that occurs to us before the soul’s separation from the body and the (...) other which is after the separation. Hence we were able to recognize that man cannot obtain real happiness in this world, tarnished with vice, or only a little. That little happiness is absolutely incomparable with real happiness which occurs only after the separation of the soul from the body. (shrink)

Dans le cadre des algorithmes numériques introduits et élaborés par les mathématiciens arabes, à partir du ixe siècle, figure l'algorithme de l'extraction de la racine carrée d'un entier naturel. Cet algorithme a été étudié chez plusieurs d'entre eux et surtout bien expliqué par alBaġdādī dans le chapitre « Comment extraire la racine des nombres entiers » de son livre « La complétion du calcul », Al-takmila fī al-ḥisāb 1. Dans ce chapitre, al-Baġdādī expose son travail pédagogiquement en six sections traitant (...) de plusieurs manières différentes le problème de l'extraction de la racine carrée d'un entier 2. À la même époque, dans un texte isolé intitulé « Sur la cause de la racine, de son doublement et de son déplacement 3 », Ibn al-Hayṯam donne une justification géométrique de l'algorithme en se basant sur des notions algébriques précises. (shrink)

The Iraqi constitution of 2005 grants freedom of religious thought, belief and practice for all religions. This study was also based on the premise that the constitutional rights are not adhered to in Iraq, even by government officials, which could be due to the absence of suitable legislations subsequent to the framing of the constitutional provisions. An analytical and descriptive research design was adopted for this study. Data was collected from primary and secondary sources through documentation research and evaluation of (...) historical sources. The primary data comprised Articles of the Iraqi constitution, and a few national and international legal instruments related to religious freedom. Secondary data included empirical research studies, books, articles and other published sources. This study therefore took the form of an empirical legal research as it involved the issues of constitutional reforms in the field of religious freedom. A comparative approach was adopted in analyzing the documents about religion and politics related to both the Arab region and the West. The focus was on the measures that should be adopted to advance the dialogues of religious freedom and maintain religious neutrality in all government policies. The study found out that there were apparent contradictions between the constitutional provisions and the State Laws. Similarly, the Iraqi civil and penal codes remain silent regarding legal remedies for the violation of constitutional provisions. (shrink)

This phenomenological study investigated educators’ lived experiences of teaching online in higher institutions in Malaysia. Data, which was generated through semi-structured interviews with 20 lecturers from three universities in the country, was analysed based on the thematic analysis approach guided by the Technological, Pedagogical, and Content Knowledge -self-efficacy framework. The findings revealed that after a year of teaching online, the potential of technology has been acknowledged by the educators after some trials and constraints were addressed. The domains related to Technology (...) Content Knowledge, Technology Pedagogical Knowledge, and TPACK were evident in the findings. However, Pedagogical Content Knowledge was not given emphasis, hence this manuscript argues that educators need to be constantly reminded of the significance of PCK. The findings discussed in this manuscript can be a helpful guide for educators when there is a need for them to teach online. (shrink)

The past three years saw more suicide attacks than the last quarter century. Most of these were religiously motivated. While most Westerners have imagined a tightly coordinated transnational terrorist organization headed by Al Qaeda, it seems more likely that nations under attack face a set of largely autonomous groups and cells pursuing their own regional aims. Repeated suicide actions show that massive counterforce alone does not diminish the frequency or intensity of suicide attack. Like pounding mercury with a hammer, this (...) sort of top-heavy counterstrategy only seems to generate more dispersed and insidious forms of suicide terrorism. Even with many top Qaeda leaders now dead or in custody, the transnational Jihadist fraternity is transforming into a hydra-headed network more difficult to fight than before. Poverty and lack of education per se are not root causes of suicide terrorism. And Muslims who have expressed support for martyr actions and trust in Osama Bin Laden or the late Hamas leader Sheikh Yassin do not as a rule hate democratic freedoms or Western culture, although many despise American foreign policy, especially in the Middle East. Rising aspirations followed by dwindling expectations – especially regarding civil liberties – are critical factors in generating support for suicide terrorism. The United States, Israel, Russia and other nations on the frontline in the war on terror need to realize that military and counterinsurgency actions are tactical, not strategic responses to suicide terrorism, the most politically destabilizing and psychologically devastating form of terrorism. When these nations back oppressive and unpopular governments this only generates popular resentment and support for terrorism against those governments and their backers. To attract potential recruits away from Jihadist martyrdom – suicide terrorism's most virulent strain - and to dry up its popular support, requires addressing these grievances before a downward spiral sets in where core meaning in life is sought, and found, in religious networks that sanctify vengeance at any cost against stronger powers, even if it kills the avenger. (shrink)

Ten years after the popular uprising that became a brutal war, Syrian and Syrian-Palestinian authors are engaged in the struggle to craft a historical consciousness that can acknowledge and mourn for their recent revolutionary past without reifying it. As they write in and of material, political, and social ruin, their works echo collective traumas in regional memory: the Palestinian nakba, the rise of Syria’s Assad regime, Lebanon’s civil war, the 2003 occupation of Iraq, and more. The ruin appears cruelly recursive, (...) yet it is arrested in the corpus of works discussed in this article: poetry by Firas Sulaiman and Osama Esber; prose by Yassin al-Haj Saleh, Samer Yazbek, and Ra’id Wahsh; and documentary film by the Abounaddara Collective. Drawing on Arabic poetic modernism and regional politics, I argue that ruin imagery—ranging from war’s rubble to ancient artefacts—carries distinctive structures of temporal anticipation in Syrian literary and cultural memory. The writers and filmmakers discussed deploy formal and thematic means of stasis and repetition, displacement and accumulation, to summon these temporal structures—only to refuse, interrupt, and reroute them. I argue that such poetic engineerings of the images of ruin assert the singularity of the Syrian present within broader collective memories of ruin. As such, they raise a historicizing challenge to the current academic dominance of reading ruin imagery, notably from the Middle East, through an imperial lens. (shrink)

بررسی اصلی‌ترین چالش‌های میان دامت و مک داول در باب نظریة معنا و توصیف مناسب رفتار زبانی .