Few figures of the Middle Ages command the attention of so many modern disciplines as Robert Grosseteste (c. 1170-1253). Theology, Philosophy, History, and Science are all areas which his life and thought continue to have significance and to inspire re-interpretation. Accompanied by a series of original commentaries, this new edition of Grosseteste's work, with English translation, draws together the perspectives of modern scientists and medieval specialists. Volume I of a six volume series, Knowing and Speaking presents two of the earliest (...) of Grosseteste's works, the treatises On the Liberal Arts and On the Generation of Sounds. These are accompanied by a significant Middle English treatise on the Seven Liberal Arts whose anonymous fifteenth-century author translated and excerpted passages from Grosseteste's treatises in a re-imagining of their structure and function.0Each work is treated separately within the volume, which is constructed in three parts. On the Liberal Arts sets Grosseteste's thoughts on the arts subjects and emphasises moral concerns about the purpose of learning. On the Generation of Sounds builds on the theories and statements of On the Liberal Arts in connection to the production of sound, elaborating the earlier position, relating the generation of sounds to human vocal and speech production. (shrink)

THE DISTINCTION BETWEEN ESSENCE AND EXISTENCE has been taken to be central to Avicenna’s metaphysics and ontology of being. Due to the influence that this distinction had on Thomism, and to a lesser extent on Maimonides’s work, some Medievalists and Orientalists took Avicenna’s distinction between essence and existence to be characterized by essentialism. A.-M. Goichon’s books Léxique de la Langue Philosophique d’Ibn Sina, Vocabulaires Comparés d’Aristote et d’Ibn Sina, and La Philosophie d’Avicenne et son Influence en Europe all offer a (...) great contribution to the translation and understanding of Avicenna’s works. However the interpretive reception of Goichon’s works has had a strong influence on subsequent Medievalists as well as Orientalist scholars. This impact on scholars, along with the stress on Avicenna’s influence on Thomism, has led in some instances to an exaggerated stress on the centrality of the essence/ existence distinction in Avicenna’s metaphysics. This state of affairs has eventually overshadowed other important aspects of Avicenna’s ontology of being and of his metaphysical and logical analysis of being in terms of the modalities of necessity, contingency, and impossibility. The examination of Avicenna’s metaphysics under the spell of all of these factors leads to an intellectually discomforting position that construes his ontology as essentialism. Consequently this leads to the interpretation of his work as being that of a metaphysician who subordinates existence to essence. Such interpretation has been even adopted by experts on Avicenna’s work within the Western scholarship as well as among some Arabists. For instance, some scholars stress that Averroes and Mulla Sadra are the metaphysicians of existence, while taking Avicenna to be the metaphysician of essence. John Caputo, a leading interpreter of Heidegger’s thought, makes extensive references to the work of the Thomist scholar Étienne Gilson in the context of examining Aquinas’s adoption of the Avicennian distinction between essence and existence. Caputo’s discussion of the essence/existence distinction adopts the standpoint that Gilson reflects in the reading of Avicenna’s metaphysics as being the starting point of a longstanding essentialist tradition that culminates with Hegel’s Science of Logic. This line of argumentation already supplies Caputo with sufficient arguments that enable him readily to stamp Avicenna’s metaphysics with Heidegger’s critique of the metaphysical tradition. Caputo based himself on what the Thomist scholar Gilson offers in this regard, particularly in taking Aquinas’s metaphysics to be the metaphysics of esse. Gilson’s position may itself be questioned on the ground that its interpretation of Avicenna has been pervaded by Thomist inclinations; this is the case, given that Gilson and other scholars construe Avicenna’s metaphysics as being essentially the metaphysics of essence. Based on this, Caputo accepts the claim that Avicenna’s ontology is essentialist. Such readings lead to the conclusion that Avicenna subordinates existence to essence and consequently that his ontology is characterized by what Heidegger takes to be a mark of the oblivion of being. The question that ought to be raised in this regard is whether the position of secondary scholarly sources is accurate. This is the case, given that some of the scholars, who propagate the claim that Avicenna is an essentialist, are after all scholars who have not consulted or studied the primary sources. Rather, they primarily rely on secondary sources that mediate Avicenna’s metaphysics through the Thomist scholarship and Latin translations. This is clearly the case with Gilson’s consideration of Avicenna’s corpus, which is addressed from the standpoint of Latin renderings of Avicenna’s texts rather than consulting the original Arabic or Persian texts. Having said that, the issue becomes more complicated in the light of considering Arabist or Medievalist scholars who do consult the primary Arabic sources, yet still hold that Avicenna is an essentialist. Such scholars remain under the influence of earlier translations and interpretations that were offered by prominent Orientalist scholars, who addressed the essence/ existence distinction in the light of broad philosophical concerns with Medieval Latin and Jewish philosophy, or by tracing the Aristotelian and Peripatetic influences on Islamic and Arabic philosophy. Some scholars like Gilson might even go further in terms of considering the works of Avicenna and Averroes from the standpoint of mapping out the doctrinal quarrels between Scotism and Thomism. The Medievalists who consult primary sources, yet who are still under the spell of earlier Orientalist views, do not attempt to review some of their positions by going back to a closer examination of the texts and to a questioning reception of dominant translations and interpretations. There is a hermeneutic need to return to the primary texts and to reexamine them in the light of new philosophical concerns. This return and reexamination are also needed in the light of questioning and adopting new methodological inclinations in translation and interpretation. This becomes a pressing issue given the seriousness of the philosophical consequences that might arise if we readily take Avicenna’s metaphysics to be characterized by essentialism. The examination of Avicenna’s ontology must account for the renderings of the terms mahiya, dhat, and wujud, be it in Latin, English, or French, or in terms of the Arabic/persian semantic, syntactic, and grammatical structure and derivation. The nuances of translation are determined by how these terms are philosophically used within the text and in the course of the development of Avicenna’s arguments. Such linguistic investigations would elucidate the philosophical interpretation of the essence/existence distinction in the light of addressing contemporary philosophical concerns, as these are attested with the consideration of Heidegger’s critique of classical ontology. (shrink)

This is the first critical edition of the first and second Epistles of the Brethren Purity--the Rasa 'il--in Arabic with a fully annotated English translation. It presents technical and epistemic analyses of mathematical concepts and their metaphysical bases, and an overview of the mathematical sciences within Islamic intellectual milieu.

Examines Avicenna’s phenomenological considerations of the question of being.

This paper addresses the notion of political theology by way of accounting for modern manifestations of transnational Islamism with a particular emphasis on the establishment of theocratic rule through the contemporary political spheres of praxis in Twelver-Shiism (Shīʿa Ithnā-ʿAsharīyya). This is undertaken by way of giving some principal highlights concerning the conceptual aspects that can be accounted for from the standpoint of political theology in the broad context of Islamist fundamentalist movements. A more detailed focus is also presented in this (...) context on the eschatology that underpins the theocracy of contemporary Twelver-Shiism in terms of its religious outlooks on history, and the conduct of its communal affairs along with the organization of its associated politicized institutions. (shrink)

Ikhwan al-Safa' (The Brethren of Purity) were the anonymous adepts of a tenth-century esoteric fraternity of lettered urbanites that was principally based in Basra and Baghdad. This brotherhood occupied a prominent station in the history of science and philosophy in Islam due to the wide reception and assimilation of their monumental encyclopaedia: Rasa'il Ikhwan al-Safa' (The Epistles of the Brethren of Purity). This compendium contained fifty-two epistles that offered synoptic explications of the classical sciences and philosophies of the age. Divided (...) into four classificatory parts, it treated themes in mathematics, logic, natural philosophy, psychology, metaphysics and theology, in addition to moral and didactic fables. The Ikhwan were learned compilers of scientific and philosophical knowledge, and their Rasa'il constituted a paradigmatic legacy in the canonization of philosophy and the sciences in mediaeval Islamic civilization. -/- This present volume gathers studies by leading philosophers, historians and scholars of Islamic Studies, who are also the editors and translators of the first Arabic critical editions and first complete annotated English translations of the Rasa'il Ikhwan al-Safa', which will be published in the OUP Series that this present volume initiates, as well as being members of the Editorial Board. -/- The chapters of this present volume explore the conceptual and historical aspects of the philosophical and scientific contents of the Rasa'il and their classification, as well as investigating the authorship and dating of this corpus and the impact that the Ikhwan's intellectual tradition exercised in the unfolding of the history of ideas in Islam. (shrink)

In attempting to address the heideggerian Seinsfrage, by way of situating it between the platonic conception of ̉όν in the Sophist and of χώρα in the Timaeus, this paper investigates the ontological possibilities that are opened up in terms of rethinking space. Asserting the intrinsic connection between the question of being and that of space, we argue that the maturation of ontology as phenomenology would not unfold in its furthermost potential unless the being of space gets clarified. This state of (...) affairs confronts us with the exacting ontological task to found a theory of space that contributes to an explication of the question of being beyond its associated temporocentric determinations. Consequently, our line of inquiry endeavors herein to constitute a prologmenon to the elucidation of the question of the being of space as “ontokhorology.”. (shrink)

Although numerous studies have been conducted on the Optics of Alhazen, and on its reception, assimilation and maturation within the course of development of the perspectivae traditions in the history of science and art, ambiguities do hitherto still surround the epistemological and ontological entailments of his theory of visual perception. In addressing this question, our inquiry herein is principally philosophical in scope and our textual reading combines exegesis with hermeneutics. While we observe the delicate procedures of historiography and philology, we (...) do not unguardedly assume that they are exhaustive of all rigorous methods of thoughtful investigation. Moreover, in heeding the internal coherence of Alhazen's text, we do not simply lock his views within reductive contextual chronologies, or readily confine them to epochal matters of textual transmission. Our endeavour is therefore not exclusively set in view of serving the purposes of archival documentation, even if we preserve a thorough and sound sense of historicity. We ultimately recognize the philosophical pertinence of numerous subtle leitmotifs within Alhazen's thinking that speak to us in an effective timely manner, which is significantly relevant in its attuned bearings to the thrust of phenomenological theories of perception. (shrink)

Using Shahzad Bashir’s open-access publication A New Vision for Islamic Pasts and Futures as a baseline, this symposium debates whether and how intellectual history can be done otherwise. Mohamed ‘Arafa follows Bashir’s invitation to explore the potential of open-ended historiographies when he thinks about the viability of a flexible method to interpret Sharī ʿ a. Nader El-Bizri interrogates whether the assemblage of personal experiential accounts offered by Bashir can be framed within the discourse of intellectual history at all. (...) Nauman Faizi reads Bashir’s approach as a radical attempt to open up hermeneutical possibilities. Lena Salaymeh suggests that modern aesthetics can contribute to neo-colonial distortions of the Islamic tradition, rather than offering alternatives to positivist historiography. Bashir proposes in his response that academics adopt generosity as an analytical gesture in their academic writing, a generosity that would enable different ways of being human in the world. (shrink)

In attempting to address the heideggerian Seinsfrage, by way of situating it between the platonic conception of ̉όν in the Sophist and of χώρα in the Timaeus, this paper investigates the ontological possibilities that are opened up in terms of rethinking space. Asserting the intrinsic connection between the question of being and that of space, we argue that the maturation of ontology as phenomenology would not unfold in its furthermost potential unless the being of space gets clarified. This state of (...) affairs confronts us with the exacting ontological task to found a theory of space that contributes to an explication of the question of being beyond its associated temporocentric determinations. Consequently, our line of inquiry endeavors herein to constitute a prologmenon to the elucidation of the question of the being of space as “ontokhorology.”. (shrink)

This paper consists of critical interrogations and speculative reflections on the ethical bearings of Emmanuel Levinas’ resourceful and intricate views on death, otherness, and time, while illustrating the nature of the philosophical challenges confronting the interpreters of his prolific writings, and investigating their intellectual, moral and political prolongations. This line of inquiry probes the multiple aspects of ethical responsibility that are entailed by the “face-to-face” relation with the other, and their potential theoretical extensions in meditations on the notion of “visage”, (...) particularly in the context of concrete practices and everyday demands. Moreover, this study offers selective analytic parallels with Martin Heidegger’s thoughts on mortality, along with associated pointers by Jean-Paul Sartre, in view of further elucidating the ethical implications of Levinas’ thinking, and exploring their tacit entanglements with politics. (shrink)

This article examines Heidegger’s account of dwelling while placing it in the broad context of a wide array of his lectures and the constellation of his collected writings. The focus on this question is primarily ontological in character, in spite of the spatial significance of the phenomenon of dwelling, and the bearings it has on a variety of disciplines that interrogate its essence, be it in architectural humanities and design or in geography, which probe the various elements of its architectonic (...) and topological underpinnings. The investigation of Heidegger’s reflections on dwelling will be connected in this line of inquiry with his consideration of what he refers to as “the gathering of the fourfold,” namely as “earth, sky, mortals and divinities,” and the manner they are admitted and installed into “things,” all to be set against the background of his meditations on the origins of the work of art, and on the unfolding of the essence of modern technology as en-framing. (shrink)

The Ikhwan al-Safa' (Brethren of Purity), the anonymous adepts of a tenth-century esoteric fraternity based in Basra and Baghdad, hold an eminent position in the history of science and philosophy in Islam due to the wide reception and assimilation of their monumental encyclopaedia, the Rasa 'il Ikhwan al-Safa' (Epistles of the Brethren of Purity). This compendium contains fifty-two epistles offering synoptic accounts of the classical sciences and philosophies of the age; divided into four classificatory parts, it treats themes in mathematics, (...) logic, natural philosophy, psychology, metaphysics, and theology, in addition to didactic fables. Epistles 6 to 8 are from the first division of the Epistles, on the propaedeutical and mathematical sciences. Epistle 6 develops ideas concerning natural numbers and their arithmetic, geometric, and harmonic ratios, marked by the influence of Nicomachus of Gerasa and of Euclid. The Brethren here emphasize practical applications of proportionality in music, medicine, and alchemy. Epistle 7 addresses theoretical scientific knowledge as directed towards the spiritual realities of souls, the goal of which is to actualize human potential; this epistle also presents a remarkable classification of sciences. Epistle 8 surveys material cultures in the Islamic mediaeval milieu, embellished by a consideration of the effects of the heavenly bodies on the predisposition of individuals to follow specific trades. These three epistles are, of course, underpinned by the Brethren's perennial tropes of the microcosm/macrocosm analogy and the emanative hierarchy of existents. (shrink)

Cet article se propose de lire la Métaphysique d’Avicenne à la lumière de la thèse heideggérienne de l’oubli de la question de l’être dans l’histoire des ontologies classiques. L’avicennisme est étudié dans le contexte des discussions philosophiques de la phénoménologie herméneutique et de l’ontologique fondamentale, dépassant ainsi le cadre de l’analyse historiographique et philologique. Il est toutefois plus complexe de juger de l’avicennisme en se situant au dehors des limites de son milieu intellectuel, historiquement distant du nôtre, les mésententes risquent (...) de devenir encore plus grandes au vu des débats actuels sur l’ontologie engendrés par la pensée heideggérienne L’approche du point de vue de l’herméneutique phénoménologique moderne s’appuie ici sur les textes avicenniens et s’effectue dans le contexte de la critique tangentielle de l’avicennisme par Heidegger. (shrink)

This paper focuses on the methodological issues related to the obstacles and potential horizons of approaching the philosophical traditions in Islam from the standpoint of comparative studies in philosophy, while also presenting selected case-studies that may potentially illustrate some of the possibilities of renewing the impetus of a philosophical thought that is inspired by Islamic intellectual history. This line of inquiry is divided into two parts: the first deals with questions of methodology, and the second focuses on ontology and phenomenology (...) of perception, by way of offering pathways in investigating the history of philosophical and scientific ideas in Islam from the viewpoint of contemporary debates in philosophy. A special emphasis will be placed on: (a) interpreting the ontology of the eleventh century metaphysician Ibn Sīnā (known in Latin as: Avicenna; d. 1037 CE) in terms of rethinking Heidegger’s critique of the history of metaphysics, and (b) analyzing the philosophical implications of the theory of vision of the eleventh century polymath Ibn al-Haytham (known in Latin as Alhazen; d. ca. 1041 CE) in terms of reflecting on Merleau-Ponty’s phenomenology of perception. (shrink)

In this long-awaited treatise, the pre-eminent scholar Muhsin Mahdi gathers the finest findings of four decades of path-breaking research and teaching to reveal Alfarabi as a great philosopher who founded political philosophy in Islam. Mahdi’s impeccable analysis brings to light the principal dimensions of Alfarabi’s intriguing contributions to political thinking and its compelling manifestation in the form of a philosophy of religion that is partly instructed by the Platonic and Aristotelian traditions. A doyen in his discipline, Mahdi eschews the conventional (...) scholarly appeal to secondary literature by refreshingly concentrating his persuasive philosophical effort on textual interpretations of primary sources and recovered manuscripts, and ultimately approaching Alfarabi by way of a measured thinking that investigates the plausible links between revealed religion and political philosophy. (shrink)

This paper investigates the objections that were raised by the philosopher ‘Abd al-La&tdotu;īf al-Baghdādī against al-&Hdotu;asan ibn al-Haytham’s geometrisation of place. In this line of enquiry, I contrast the philosophical propositions that were advanced by al-Baghdādī in his tract: Fī al-Radd ‘alā Ibn al-Haytham fī al-makān, with the geometrical demonstrations that Ibn al-Haytham presented in his groundbreaking treatise: Qawl fī al-Makān. In examining the particulars of al-Baghdādī’s fragile defence of Aristotle’s definition of topos as delineated in Book IV of the (...) Physics, which was rejected on mathematical grounds by Ibn al-Haytham, a special attention is also given to highlighting the systemic distinctions between the entities that are studied within the speculative physical doctrines of common sense and immediate experience, and the postulated ‘objects’ of scientific and mathematical research. (shrink)

The Epistles of the Brethren of Purity' is an encyclopedic compendium, probably composed in tenth-century Iraq by a society of adepts with Platonic, Pythagorean, and Shi'i tendencies. Its 52 sections ('epistles') are divided into four parts (Mathematics, Natural Philosophy, Sciences of the Soul and Intellect, and Theology). The current volume provides an edition, translation, and notes to Epistle 3 ('On Astronomia'), which forms one of the 14 sections on Mathematics. The content is a mixture of elementary astronomy and astrology, but (...) it is not a beginner's textbook. Rather, the purpose is to use examples from those disciplines to provide spiritual, moral, and soteriological guidance. Thus the Epistle uses the argument from design to show the necessity for a Creator who made the harmonious universe; this wondrous design is then employed by the authors as a model, providing humans with a paradigm for proper ethical, political, and even economic conduct; and the study of Astronomia helps the soul achieve ultimate happiness as it seeks to throw off the shackles of this mundane world and oppressive body in favour of the purity of the celestial realm.0Although by no means typical of Islamic astronomical literature, Epistle 3 of the Brethren of Purity gives a window into a fascinating and intriguing group operating during the early period of Islam who sought to continue and adopt one of the esoteric strands of Hellenistic philosophy within an Islamic context, meshing astronomy, astrology, Platonic-Pythagorean philosophy, Quranic and Biblical quotations, and anecdotes from the lives of the Abrahamic prophets. (shrink)

The problem of finding optimal sampling schemes has been resolved in two models. The novelty of this study lies in its cost efficiency, specifically, for the applied problems with expensive sampling process. In discussed models, we show that some observations counteract other ones in prediction mechanism. The autocovariance function of underlying process causes mentioned result. Our interesting result is that, although removing neutralizing observations convert sampling scheme to nonredundant case, it causes to worse prediction. A simulation study confirms this matter, (...) too. (shrink)

Research has shown high levels of housing precarity among government-assisted refugees connected to difficult housing markets, limited social benefits, and other social and structural barriers to positive settlement. The COVID-19 pandemic has likely exacerbated this precarity. Research to date demonstrates the negative consequences of the COVID-19 pandemic for refugees and low-income households, including both health-related issues and economic challenges, that may exacerbate their ability to obtain affordable, suitable housing. In this context, we examined Syrian government-assisted refugees’ experiences during the pandemic, (...) asking: how the COVID-19 pandemic has impacted Syrian refugees’ experiences of housing stability. To examine this issue, we interviewed 38 families in Calgary, London, and Fredericton. Using a qualitative descriptive methodology for analysis and interpretation, we found the liminality of settling as a GAR has been compounded by isolation, further economic loss, and new anxieties during the pandemic. Ultimately, for many participants, the pandemic has thwarted their housing stability goals and decreased their likelihood of improving their housing conditions. Based on our findings, we discuss potential policy and practice relevant solutions to the challenges faced by refugees in Canada during the pandemic and likely beyond. (shrink)

By proposing the Microcosm and Macrocosm analogy for dialogue between Islamic Philosophy and Occidental Phenomenology, the authors of this volume are reviving the perennial positioning of the human condition in the play of forces within and without the human being. This theme has run from Plato through the Middle Ages, Renaissance and Modernity, and has been ignored by contemporaries. It now acquires a new pertinence and striking significance due to the scientific discoveries into the "infinitely small" in life, on the (...) one hand, and the prodigious technological discoveries of the "infinitely great" on the other. Both open up undreamt-of prospects for the continuing conquest of cosmic forces. The human person – thrown into turmoil by the new approaches to life and needing to acquire new habits of mind, having lost security of all beliefs – desperately seeks a new clarification of the Human Condition within the unity of everything-there-is, of cosmic forces, and of his destiny. The dialogue between Islamic Philosophy and phenomenology of life can show the way. Papers by: Gholam-Reza A'awani, Mehdi Aminrazavi, Roza Davari Ardakani, Mohammad Azadpur, Gary Backhaus, Marina Banchetti-Robino, William Chittick, Seyed Mostafa Muhaghghegh Damad, Golamhossein Ebrahimi Dinani, Nader El-Bizri, Kathleen Haney, Salahaddin Khalilov, Sayyid Mohammad Khamenei, Mahmoud Khatami, Mieczyslaw Pawel Migon, Nikolay Milkov, Sachiko Murata, Anna-Teresa Tymieniecka, Daniela Verducci. (shrink)

Mu‘allâkâtların, tefsir, nahiv, sarf ve dil ilimlerindeki önemli rolünün yanı sıra Arap dili ve edebiyatı âleminde de yüksek ve önemli bir konumu bulunmaktadır. Cahiliye devri müfredatlarının pek çoğunu kapsamasından ötürü dil ve edebiyat erbabı ona önem atfetmiştir. Onlardan biri de, ‘Şerhü’l-Kasâ’idi’l-السبع’ adıyla el-Muâ‘llekât’a yaptığı şerhiyle Ebu Bekir Muhammed bin el-Kasım bin Beşar bin el-Anbari. Bu eserinde pek çok nahiv, zamirin aidiyeti, harflerin manası, zarf ile car ve mecrûrun bağlı olduğu yerin belirlenmesi, müfredatlarıni‘râbı, illetler arasındaki üstünlükler, kıyasa ve luğatta asıl olana, (...) kelimenin irabını belirlemede bazı seslerin etki nedenlerine, sarf, lügat, belağat, eleştiri vb. konulara değinmektedir. Bu itibarla bu araştırma, betimsel analitik yöntemini kullanarak et-Anbari’ninMu‘allâkât şerhindeki nahiv yöntemini, Arap nahiv ilminde iki önemli konu olan kıyas ve ta‘lîl ile ilgili duruşunu açıklayarak değerlendirmeyi hedeflemektedir. (shrink)

Mu‘allâkâtların, tefsir, nahiv, sarf ve dil ilimlerindeki önemli rolünün yanı sıra Arap dili ve edebiyatı âleminde de yüksek ve önemli bir konumu bulunmaktadır. Cahiliye devri müfredatlarının pek çoğunu kapsamasından ötürü dil ve edebiyat erbabı ona önem atfetmiştir. Onlardan biri de, ‘Şerhü’l-Kasâ’idi’l-السبع’ adıyla el-Muâ‘llekât’a yaptığı şerhiyle Ebu Bekir Muhammed bin el-Kasım bin Beşar bin el-Anbari. Bu eserinde pek çok nahiv, zamirin aidiyeti, harflerin manası, zarf ile car ve mecrûrun bağlı olduğu yerin belirlenmesi, müfredatlarıni‘râbı, illetler arasındaki üstünlükler, kıyasa ve luğatta asıl olana, (...) kelimenin irabını belirlemede bazı seslerin etki nedenlerine, sarf, lügat, belağat, eleştiri vb. konulara değinmektedir. Bu itibarla bu araştırma, betimsel analitik yöntemini kullanarak et-Anbari’ninMu‘allâkât şerhindeki nahiv yöntemini, Arap nahiv ilminde iki önemli konu olan kıyas ve ta‘lîl ile ilgili duruşunu açıklayarak değerlendirmeyi hedeflemektedir. (shrink)

Biometrics readers are deployed in many public sites and are used for user identification and verification. Nowadays, most biometrics readers can be connected to local area networks, and consequently, they are potential targets for network attacks. This article investigates the robustness of several fingerprint and iris readers against common denial of service attacks. This investigation has been conducted using a set of laboratory experiments and DoS attack generator tools. The experiments show clearly that the tested biometric readers are very vulnerable (...) to common DoS attacks, and their recognition performances deteriorate significantly once they are under DoS attacks. Finally, the article lists some security consideration that should be taken into consideration when designing secure biometrics readers. (shrink)

Fundamentalism was and still is a major threat to global peace and security. The modern world has shown itself to be vulnerable to this persistent threat. The emergence and growth of many fundamentalist cults in the last century, from fascism and communism to various types of religious fundamentalism, is sufficient proof of this point. This paper presents a philosophical investigation of fundamentalism and its specific relation to skepticism, and highlights the ineffectiveness of skeptical philosophies to prevent fundamentalism in human society. (...) Finally, it identifies a theoretical problem in modern thought which is at least partly responsible for the practical vulnerability of the modern world to fundamentalism, and discusses the possibility and necessity of a solution to fix that problem. (shrink)

During each school semester, students face an onslaught of material to be learned. Students work hard to achieve initial mastery of the material, but when they move on, the newly learned facts, concepts, and skills degrade in memory. Although both students and educators appreciate that review can help stabilize learning, time constraints result in a trade-off between acquiring new knowledge and preserving old knowledge. To use time efficiently, when should review take place? Experimental studies have shown benefits to long-term retention (...) with spaced study, but little practical advice is available to students and educators about the optimal spacing of study. The dearth of advice is due to the challenge of conducting experimental studies of learning in educational settings, especially where material is introduced in blocks over the time frame of a semester. In this study, we turn to two established models of memory—ACT-R and MCM—to conduct simulation studies exploring the impact of study schedule on long-term retention. Based on the premise of a fixed time each week to review, converging evidence from the two models suggests that an optimal review schedule obtains significant benefits over haphazard (suboptimal) review schedules. Furthermore, we identify two scheduling heuristics that obtain near optimal review performance: (a) review the material from μ-weeks back, and (b) review material whose predicted memory strength is closest to a particular threshold. The former has implications for classroom instruction and the latter for the design of digital tutors. (shrink)

BackgroundConsenting for retrospective medical records-based research (MR) and leftover tissue-based research (TR) continues to be controversial. Our objective was to survey Saudis attending outpatient clinics at a tertiary care hospital on their personal preference and perceptions of norm and current practice in relation to consenting for MR and TR.MethodsWe surveyed 528 Saudis attending clinics at a tertiary care hospital in Saudi Arabia to explore their preferences and perceptions of norm and current practice. The respondents selected one of 7 options from (...) each of 6 questionnaires.ResultsRespondents' mean (SD) age was 33 (11) years, 42% were males, 56% were patients, 84% had ≥ secondary school education, and 10% had previously volunteered for research. Respectively, 40% and 49% perceived that the norm is to conduct MR and TR without consent and 38% and 37% with general or proposal-specific consent; the rest objected to such research. There was significant difference in the distribution of choices according to health status (patients vs. companions) for MR (adjusted Kruskal-Wallis test P = 0.03) but not to age group, gender, education level, or previous participation in research (unadjusted P = 0.02 - 0.59). The distributions of perceptions of current practice and norm were similar (unadjusted Marginal Homogeneity test P = 0.44 for MR and P = 0.89 for TR), whereas the distributions of preferences and perceptions of norm were different (adjusted P = 0.09 for MR and P = 0.02 for TR). The distributions of perceptions of norm, preferences, and perceptions of current practice for MR were significantly different from those of TR (adjusted P < 0.009 for all).ConclusionsWe conclude that: 1) there is a considerable diversity among Saudi views regarding consenting for retrospective research which may be related to health status, 2) the distribution of perceptions of norm was similar to the distribution of perceptions of current practice but different from that of preferences, and 3) MR and TR are perceived differently in regard to consenting. (shrink)