Quantum Mechanics is a good example of a successful theory. Most of atomic phenomena are described well by quantum mechanics and cases such as Lamb Shift that are not described by quantum mechanics, are described by quantum electrodynamics. Of course, at the nuclear level, because of some complications, it is not clear that we can claim the same confidence. One way of taking these complications and corrections into account seems to be a modification of the standard quantum theory. In this (...) paper and its follow ups we consider a straightforward way of extending quantum theory. Our method is based on a Bohmian approach. We show that this approach has the essential ability for extending quantum theory, and we do this by introducing “non-Bohmian” forms for the quantum potential. (shrink)

Having constituted a new epoch in human history and a new religiouspolitical order, the revealed religions challenged the tradition of Greek philosophy to adjust to, investigate, and make intelligible a religiouspolitical order based on prophecy, revelation, and the divine law. The challenge led certain Arab and Muslim philosophers to reassess the relative distance between the thought of the Greek masters, and the doctrines propagated by the revealed religions, and to make use of such works as Plato's Republic and Laws, rather (...) than Aristotle's Politics, when offering a philosophic account of the new religious–political phenomenon and of such new disciplines as the science of the divine law and the science of revealed theology. Les religions révélées, en inaugurant une ère nouvelle dans l'histoire humaine et un nouvel ordre “religio-politique”, ont constitué un défi pour la tradition de la philosophie grecque. Celle-ci devait s'adapter a un ordre religio-politique fondé sur la prophétie, la révélation et la loi divine, en faire un objet d'investigation et le rendre intelligible. Ce défi conduisit certains philosophes arabes et musulmans à réévaluer la distance qui sépare la pensée des maîtres grecs des doctrines propagées par les religions révelées. Il les conduisit aussi à faire usage d'oeuvres telles que la République et les Lois de Platon, plutôt que la Politique d'Aristote dans leur effort de rendre compte philosophiquement du phénomène religio-politique nouveau et des nouvelles disciplines telles que la science de la loi divine et la science de la théologie révélée. (shrink)

This volume consists of nine essays on the political teaching of such Muslim philosophers as al-Kindi and al-Razi, as well as the more familiar al-Fârâbî, ...

In this work, Muhsin Mahdi--widely regarded as the preeminent scholar of Islamic political thought--distills more than four decades of research to offer an authoritative analysis of the work of Alfarabi, the founder of Islamic political philosophy. Mahdi, who also brought to light writings of Alfarabi that had long been presumed lost or were not even known, presents this great thinker as his contemporaries would have seen him: as a philosopher who sought to lay the foundations for a new (...) understanding of revealed religion and its relation to the tradition of political philosophy. Beginning with a survey of Islamic philosophy and a discussion of its historical background, Mahdi considers the interrelated spheres of philosophy, political thought, theology, and jurisprudence of the time. He then turns to Alfarabi's concept of "the virtuous city," and concludes with an in-depth analysis of the trilogy, Philosophy of Plato and Aristotle. This philosophical engagement with the writings of and about Alfarabi will be essential reading for anyone interested in medieval political philosophy. (shrink)

Recently there is an increasing technological development in intelligent tutoring systems. This field has become interesting to many researchers. In this paper, we present an intelligent tutoring system for teaching information security. This intelligent tutoring systems target the students enrolled in Advanced Topics in Information Security in the faculty of Engineering and Information Technology at Al-Azhar University in Gaza. Through which the student will be able to study the course and solve related problems. An evaluation of the intelligent tutoring systems (...) was carried out and the results were promising. (shrink)

Legal anti-positivism is widely believed to be a general theory of law that generates far too many false negatives. If anti-positivism is true, certain rules bearing all the hallmarks of legality are not in fact legal. This impression, fostered by both positivists and anti-positivists, stems from an overly narrow conception of the kinds of moral facts that ground legal facts: roughly, facts about what is morally optimific—morally best or morally justified or morally obligatory given our social practices. A less restrictive (...) view of the kinds of moral properties that ground legality results in a form of anti-positivism that can accommodate any legal rule consistent with positivism, including the alleged counter-examples. This form of “inclusive” anti-positivism is not just invulnerable to extensional challenges from the positivist. It is the only account that withstands extensional objections, while incorporating, on purely conceptual grounds, a large part of the content of morality into law. (shrink)

Expressivists traditionally explain normative supervenience by saying it is a conceptual truth. I argue against this tradition in two steps. First, I show the modal claim that stands in need of explanation has been stated imprecisely. Classic arguments in metaethics for normative supervenience and those that rely on it as a premise presuppose a constraint on the supervenience base that is rarely (if ever) made explicit: the repeatability of the non-normative properties on which the normative supervenes. Non-normative properties are repeatable (...) when it is possible for numerically distinct individuals to share them. Second, I show if the modal truth that stands in need of explanation entails that there are individuals exactly alike in repeatable non-normative respects that cannot normatively differ, then standard expressivist accounts of normative supervenience as a conceptual truth are unsuccessful. Expressivist metasemantics for normative terms, together with constitutive facts about the non-cognitive attitudes essentially involved in normative thought, strongly suggest that repeatable supervenience could not be a conceptual truth. I argue, finally, that although repeatable supervenience bears the marks of a conceptual truth, expressivists should be content to treat it as an ordinary normative truth, and to explain it the same way they explain other normative truths. (shrink)

Commentary on Crowe's metaethics and his theory of law as a goodness-fixing kind.

The metaethical subjectivist claims that there is nothing more to a moral disagreement than a conflict in the desires of the parties involved. Recently, David Enoch has argued that metaethical subjectivism has unacceptable ethical implications. If the subjectivist is right about moral disagreement, then it follows, according to Enoch, that we cannot stand our ground in moral disagreements without violating the demands of impartiality. For being impartial, we’re told, involves being willing to compromise in conflicts that are merely due to (...) competing desires—the parties to such conflicts should decide what to do on the basis of a coin flip. I suggest that Enoch is mistaken in his conception of what it means to be impartial. Once impartiality is properly construed, standing one’s ground in desire-based conflicts, whether or not moral values are at stake in the conflict, is consistent with being impartial. I defend a view on which impartiality can be understood in terms of features of our desiring attitudes. An agent acts impartially in desire-based conflicts whenever she is motivated by a final desire that aims at promoting the wellbeing of persons in a way that is insensitive to the identities of persons and their morally arbitrary features like their gender or skin color. Based on the account, I explain where Enoch’s discussion of the argument goes wrong, as well as why responses to the argument from Enoch’s critics have so far missed the mark. (shrink)

According to Fine (among others), a nonbasic factual proposition must be grounded in facts involving those of its constituents that are both real and fundamental. But the principle is vulnerable to several dialectically significant counterexamples. It entails, for example, that a logical Platonist cannot accept that true disjunctions are grounded in the truth of their disjuncts; that a Platonist about mathematical objects cannot accept that sets are grounded in their members; and that a color primitivist cannot accept that an object’s (...) being scarlet grounds its not being chartreuse. The Finean might try to defend these implications, but it generates further problems. Instead, the principle should be rejected. An important upshot is that the principle cannot be relied on, as it has been, to distinguish robust realists from anti-realists about a propositional domain—the principle obscures ways of taking features to be both real and fundamental. (shrink)

For students of political philosophy, the history of religion, and medieval civilization, this book provides a rich storehouse of medieval thought drawn from Latin, Hebrew, and Arabic sources.

THE ARTICLE COMMENTS ON THOSE SECTIONS OF ALFARABI'S "BOOK OF LETTERS" WHERE HE PRESENTS A META-PHILOSOPHICAL ACCOUNT OF THE 'HISTORY' OF PHILOSOPHY AND RELIGION, THE STAGES THROUGH WHICH THEY PASS, AND THE RELATION AND CONFLICT BETWEEN THE TWO-BOTH AS THEY DEVELOP WITHIN A SINGLE NATION AND WHEN THEY ARE TRANSFERRED ACROSS NATIONAL BOUNDARIES. IT SHOWS ALFARABI'S ACUTE SELF-CONSCIOUSNESS REGARDING THE TEMPORAL AND RELIGIOUS CONTEXT WITHIN WHICH PHILOSOPHY WAS BEING PRACTICED IN THE ISLAMIC WORLD.

Judges decide cases by appeal to rules of general application they deem to be law. If a candidate rule resolves the case and is, ex ante and independently of the judge’s judgment, the law, then the judge has a legal obligation to declare it as such and follow it. That, at any rate, is conventional wisdom. Yet the principle is false – a rule’s being law or the judge’s believing it to be law is neither necessary nor even sufficient for (...) a judge being legally obliged to follow it. The principle’s falsity is especially apparent in so-called hard cases, where the line between legal and non-legal rules is obscure. Moreover, judges have authority to disregard law in hard cases not because moral obligations trump legal obligations. Rather, the law itself circumscribes its own authority. The implications for legal philosophy are significant; for one, a theory of juridical norms can be developed independently of the precise boundaries of legality. (shrink)

Very few studies have investigated the movement in stock returns that result due to changes in oil prices. In recent years due to cooling down of China, unveiled oil reserves of Iran, decreasing demand worldwide and discovery of shale gases the world has experienced a large fall in the oil prices. These changes are also affecting performance of manufacturing and other associated companies in countries all over the world. Pakistan has also been affected by these changes in many ways. Especially, (...) the returns on stock markets have been affected a lot by the variations in the oil prices. This paper using monthly data set from years 2014 to 2016 of the non-financial firms operated in Pakistan Stock Exchange, investigates the effect of variation in oil prices on returns on stock. Results from the panel data analysis indicate a negative relationship between the variables. Since, Pakistan is an oil importing, movement in the prices contribute towards affecting the production cost in a positive manner which in turn affects the execution of the enterprises as well as returns of the stocks negatively. (shrink)

As Shī’ī eschatological doctrine, thus the concept of the Mahdi consists of the belief in the Imām Mahdī or the Hidden Imām who will reappear at the end of time as a savior realizing sociopolitical justice and equity through which a peaceful life based on the ideals of religious teaching may be realize an ideal religious society.

The concept of apocalypse is well established in all the major religions of the world, be they Semitic religions or Hinduism. The underlying idea behind the concept in all the religions remains the same, that is, the world will come to an end. The end itself, which has been called the Judgment Day, Day of Resurrection, or the Day of Retribution or Reckoning will be preceded by some signs. It has also been called the day of Apocalypse, the day when (...) the whole world will be destroyed. One of the distinct forms of it is Muslim Apocalypse about which a lot has been written. However, the argument of the present research paper shall be to examine the concept of the Mahdi primarily from the Shi’te Muslim point of view. The premise of the argument is that Shi’te argument or concept of the Mahdi is far more substantial having a solid theoretical foundation than the other perspectives about it. No wonder, therefore, the concept of the Mahdi has manifested itself in literature across cultures and ages. There are so many poets, primarily, Muslim poets who have highlighted this concept in their poetry and thus the research paper shall make an attempt to look at some of those poets and their understanding of it. (shrink)

Muhsin Sayyid Mahdi, James Richard Jewett Emeritus Professor of Arabic at Harvard University, died on July 9 in Brookline, Massachusetts, after a long series of illnesses.

This 1989 second volume of Professor Williams' translation of al-Tabarī's account of the early 'Abbāsī empire focuses on the reigns of the son - al-Mahdī - and grandsons - al-Hadi and Hārūn al-Rashīd - of Caliph al-Mansūr, the subject of the first volume. This was the 'Golden Prime' of the empire, before the civil war between the sons of al-Rashīd and the movement of the capital away from Baghdad. Also considered is the story of the Persian aristocratic family, the Barmakis, (...) who became the real rulers under the indolent al-Rashīd, until he destroyed them in a rage which astonished his contemporaries. The events are narrated through the reminiscences of eyewitnesses, woven together by the great historiographer al-Tabarī. The translator of the volume is an Islamicist who has lived many years in the Arab world and has a rare knowledge of its culture and literature. (shrink)