In this paper, we present an intensive investigation of the finite volume method compared to the finite difference methods. In order to show the main difference in the way of approaching the solution, we take the Burgers equation and the Buckley–Leverett equation as examples to simulate the previously mentioned methods. On the one hand, we simulate the results of the finite difference methods using the schemes of Lax–Friedrichs and Lax–Wendroff. On the other hand, we apply Godunov’s scheme to simulate the (...) results of the finite volume method. Moreover, we show how starting with a variational formulation of the problem, the finite element technique provides piecewise formulations of functions defined by a collection of grid data points, while the finite difference technique begins with a differential formulation of the problem and continues to discretize the derivatives. Finally, some graphical and numerical comparisons are provided to illustrate and corroborate the differences between these two main methods. (shrink)

Feminism is sensational -- On being directed -- Willfulness and feminist subjectivity -- Trying to transform -- Being in question -- Brick walls -- Fragile connections -- Feminist snap -- Lesbian feminism -- Conclusion 1: A killjoy survival kit -- Conclusion 2: A killjoy manifesto.

We give a new characterization of the class of completely representable cylindric algebras of dimension 2 #lt; n w via special neat embeddings. We prove an independence result connecting cylindric algebra to Martin''s axiom. Finally we apply our results to finite-variable first order logic showing that Henkin and Orey''s omitting types theorem fails for L n, the first order logic restricted to the first n variables when 2 #lt; n#lt;w. L n has been recently (and quite extensively) studied as a (...) many-dimensional modal logic. (shrink)

_The Promise of Happiness_ is a provocative cultural critique of the imperative to be happy. It asks what follows when we make our desires and even our own happiness conditional on the happiness of others: “I just want you to be happy”; “I’m happy if you’re happy.” Combining philosophy and feminist cultural studies, Sara Ahmed reveals the affective and moral work performed by the “happiness duty,” the expectation that we will be made happy by taking part in that which (...) is deemed good, and that by being happy ourselves, we will make others happy. Ahmed maintains that happiness is a promise that directs us toward certain life choices and away from others. Happiness is promised to those willing to live their lives in the right way. Ahmed draws on the intellectual history of happiness, from classical accounts of ethics as the good life, through seventeenth-century writings on affect and the passions, eighteenth-century debates on virtue and education, and nineteenth-century utilitarianism. She engages with feminist, antiracist, and queer critics who have shown how happiness is used to justify social oppression, and how challenging oppression causes unhappiness. Reading novels and films including_ Mrs. Dalloway_, _The Well of Loneliness_, _Bend It Like Beckham_, and _Children of Men_, Ahmed considers the plight of the figures who challenge and are challenged by the attribution of happiness to particular objects or social ideals: the feminist killjoy, the unhappy queer, the angry black woman, and the melancholic migrant. Through her readings she raises critical questions about the moral order imposed by the injunction to be happy. (shrink)

From mobile health and wearables to implantable medical devices and neuroprosthetics, the integration of machines into human biology and cognition is expanding. This paper explores the technological advancements that are pushing the human–machine boundaries further, raising profound questions about identity and existence in digital realms. The development of robots, androids, and AI–human hybrids promises to augment human capabilities beyond current limits. However, alongside these advancements, significant limitations arise: biological, technical, ethical, and legal. This paper further discusses the existential implications of (...) these technological strides. It addresses the philosophical dimensions of mortality, forgiveness, and the significance of death in a world where technological immortality may be within reach. By addressing these questions, the paper seeks to provide a comprehensive analysis of the potential for these advancements to reshape our understanding of existence and the quest for immortality. (shrink)

Introduction: find your way -- Orientations toward objects -- Sexual orientation -- The orient and other others -- Conclusion: disorientation and queer objects.

In this paper, we are trying to summarize the peak of achievement of the Arabian logicians of the fifteenth century by making a classification and sketching in familiar terms the conditional and subjunctive syllogisms in Muḥammad Ibn Yusūf al-SSinūsī’s (1426-1490) work, i.e. in his explanation of Kitāb al-Muḫtaşar fī al-Manṭiq of al-Imām Muḥammad Ibn ʿArafa (1316- 1401).

The form of the conditional syllogism resembles that of the categorical syllogism, while its subject matter is at least a conditional premise, but its conclusion is always conditional conjunctive or disjunctive. This mixed structure to which we apply the rules of the categorical syllogism, is a structure of which Aristotle did not have an idea, and which the Stoics did not conceive, and which the non-Arabian logicians did not know until in modern times. But what we have to notice here (...) is the putting of a conditional matter in the form of the categorical syllogism, and it is this kind of hybridization, if we dare to say, which generated this mixed structure which appeared for the first time in the history of logic in the treatise on the logic of Ibn Sina and which can be considered a discovery by this author until proof to the contrary, and that the ancient Arabian logicians have taken the habit of exhibiting in their treatises. (shrink)

ABSTRACTIn a bilingual educational setting, even when mathematical word problems are presented in one’s first language, students may still perform poorly if cognitive constraints such as working me...

In the Greek/Indian period, it is noticeable that different radii were used in connection with the chord. This manner continued in the Indian period with the sine, i.e. different sine tables existed. But throughout the Arabic-Islamic period, there was stability in the radius (for the sine). At the time of al-Batt new terms were introduced, not as functions of angles but as lengths, and again different tables for the same term. Here these terms were not bounded to the circle, and (...) the term miqythe radiusfunctions al-Waf’s time, there was an advancement by introducing the new terms as functions of angles, and they were immediately bounded to the circle, and instead of having two circles in the same figure, a kind of unity appeared, and again there was stability in the value of r, and therefore only one table for each function, and thus the new functions started to appear more abstract than practical as the sine did before, and this unity remained fixed in the modern times. (shrink)

This study investigates the association of a broad set of variables with the ethical decision making of management accountants in Libya. Adopting a cross-sectional methodology, a questionnaire including four different ethical scenarios was used to gather data from 229 participants. For each scenario, ethical decision making was examined in terms of the recognition, judgment and intention stages of Rest’s model. A significant relationship was found between ethical recognition and ethical judgment and also between ethical judgment and ethical intention, but ethical (...) recognition did not significantly predict ethical intention—thus providing support for Rest’s model. Organizational variables, age and educational level yielded few significant results. The lack of significance for codes of ethics might reflect their relative lack of development in Libya, in which case Libyan companies should pay attention to their content and how they are supported, especially in the light of the under-development of the accounting profession in Libya. Few significant results were also found for gender, but where they were found, males showed more ethical characteristics than females. This unusual result reinforces the dangers of gender stereotyping in business. Personal moral philosophy and moral intensity dimensions were generally found to be significant predictors of the three stages of ethical decision making studied. One implication of this is to give more attention to ethics in accounting education, making the connections between accounting practice and Islam. Overall, this study not only adds to the available empirical evidence on factors affecting ethical decision making, notably examining three stages of Rest’s model, but also offers rare insights into the ethical views of practising management accountants and provides a benchmark for future studies of ethical decision making in Muslim majority countries and other parts of the developing world. (shrink)

Most philosophers agree that causal knowledge is essential to decision-making: agents should choose from the available options those that probably cause the outcomes that they want. This book argues against this theory and in favour of evidential or Bayesian decision theory, which emphasises the symptomatic value of options over their causal role. It examines a variety of settings, including economic theory, quantum mechanics and philosophical thought-experiments, where causal knowledge seems to make a practical difference. The arguments make novel use of (...) machinery from other areas of philosophical inquiry, including first-person epistemology and the free will debate. The book also illustrates the applicability of decision theory itself to questions about the direction of time and the special epistemic status of agents. (shrink)

El propósito de este artículo es mostrar que el escrito medieval no posee el mismo estatuto ni los mismos valores que hoy en día y, a partir de ahí, reaccionar ante la oposición entre lo oral y lo escrito que se utiliza a propósito de la literatura árabe en sus comienzos. La tesis propuesta defiende que, hasta la segunda mitad, si no hasta el final del siglo III de la Hégira, los textos de adab, aunque compuestos y producidos por escrito, (...) lo habían sido en la idea de que su circulación, su comunicación y recepción se haría, en la mayor parte de los casos, oralmente. Es este fenómeno el que define el estatus del adab de sus «autores», y de la naturaleza de las obras que lo constituyen. (shrink)

Il s¿agit de poursuivre le travail de relecture du Kiláó al-Buhalá' consmencé dans larticle paru dans le Bulleíin dÉludes Orientales de Damas (LI 1999:"Avarice ou sophistique? Une lecture du Livre des ovares d'al-Gdisig"), travail qui pose que le propos du célébre polygraphe nesí pas tant la critique de lavarice, nu de la gueuserie (lmdya) dans le cas de Halib b. Yazid, que celle du détnumement des discours de leura fnnctions supposées nobles. Dans le récit "autobiographique" el le testament spirituel de (...) Ijálawayh al~MukaddI, ce qui se trouve mimé, parodié pnur étre dénigré, cesí, semble-t-il, la pratique des sermonnaires populaire> (Qu~sás), el, plus généralemení, celle des 'ulamá' qui prétendent éduquer les fonles. Larticle s'attache á analyser les procédés stylistiques et rhétoriques utilisés par al-Óálii~ pour vilipender ces usages dévoyés du discours. (shrink)

The model of feminism as humanist in practice and postmodern in theory is inadequate. Feminist practice and theory directly inform each other to displace both humanist and postmodern conceptions of the subject. An examination of feminism's use of rights discourse suggests that feminist practice questions the humanist conception of the subject as a self-identity. Likewise, feminist theory undermines the postmodern emphasis on the constitutive instability and indeterminacy of the subject.

The two faces of a puzzle -- Two approaches to the enigma of consciousness -- Methodology, terminology, and the missed point -- Freud's project and the conception of consciousness -- A concise of the theory of the aconscious -- The unconscious and the aconscious.

BackgroundPeople say it is hard to stay truly positive in Lebanon. Studies showed that 63% of Lebanese young adults are highly dissatisfied with their country. In fact, young adults are the most vulnerable population to stressors in Lebanon since their future is at stake and it is their time to shape their lives in a country that cripples them. This study aimed to assess factors associated with positivity among a sample of Lebanese university students despite the various stressors they are (...) facing on top of the economic collapse and the COVID-19 pandemic.MethodsThis cross-sectional study was conducted between November and December 2021. A total of 333 participants was recruited through convenience sampling and snowball technique through several areas in Lebanon’s governorates. A linear regression taking the positivity score as the dependent variable was adopted and all variables that showed a correlation > │0.24│ in absolute value were entered in the final model as independent.ResultsA linear regression taking the positivity score as the dependent variable showed that more positive experiences in life, more flourishing, living in rural area compared to urban, and female gender were significantly associated with more positivity.ConclusionThis study demonstrated that the youth’s positivity is strongly affected by age, gender, residency, and the country they live in that will both directly and indirectly shape their life experiences and their ability to flourish and prosper. Along with all the efforts done to help during this collapse and alleviate the stress that young adults are enduring, follow-up studies are still needed to determine accurate coping techniques that pushes these young adults to think positively in a country where negativity reigns and all else fails. (shrink)

Differences That Matter challenges existing ways of theorising the relationship between feminism and postmodernism which ask 'is or should feminism be modern or postmodern?' Sara Ahmed suggests that postmodernism has been allowed to dictate feminist debates and calls instead for feminist theorists to speak (back) to postmodernism, rather than simply speak on (their relationship to) it. Such a 'speaking back' involves a refusal to position postmodernism as a generalisable condition of the world and requires closer readings of what postmodernism (...) is actually 'doing' in a variety of disciplinary contexts. Sara Ahmed hence examines constructions of postmodernism in relation to rights, ethics, subjectivity, authorship, meta-fiction and film. (shrink)

Le cri que porte l'intitulé de cet ouvrage est un appel aux lecteurs et aux historiens du Rushdisme à une halte réflexive sur ce que l'auteur appelle cri. Car le cri est une revendication légitime du philosophe. C'est une sorte de voix extra temporelle qui, par fidélité à l'esprit de sa philosophie, s'insurge et déclare que sa pensée a été trahie. Qui est donc ce philosophe à qui on a prêté tant de légendes et commis à son égard tant d'erreurs? (...) Est-ce un grand philosophe réduit au statut de simple commentateur? Ou est-ce une grande méprise à l'égard d'un penseur dont le seul tort est d'avoir voulu sauver le rationalisme philosophique? C'est avec force et détermination que l'auteur de cet essai nous démontre ses convictions sur un personnage historique essentiel, manifestement trop méconnu... Ahmed Mellah est professeur de philosophie. Il a pour ambition de soumettre la philosophie islamique à une analyse critique qui la débarrasserait du dogmatisme institué et autres a priori qui la gangrènent et rendent toute lecture audacieuse totalement inopérante. (shrink)

The market relationships are being contested. This can be seen in the increasing number of alternative social experiments in the ‘North’ and the ‘South’ which propose to think out the present market relationships in a different way, in particular in establishing exchange value and in facilitating access to trade. These practical alternatives are supported by trends in academic circles that over the past three decades have opposed neoliberal capitalism and individualism in today's commercialised society. Calling for greater solidarity and social (...) justice in economic relationships, in particular, partisans of social and solidarity economics, identifying with these trends, demand new forms of exchange. The objective of this article is to re-examine these demands. What exactly do the SSE mean by ‘solidarity’ and ‘solidarity-based economy'? We would like to trace the contours of this theoretical and political project and to assess the practicability of the proposed alternative to neoliberal capitalism. (shrink)

has offered evidential decision theorists a defence against the charge that they make unintuitive recommendations for cases like Newcomb's Problem. He says that when conditional probabilities are assessed from the agent's point of view, evidential decision theory makes the same recommendation as intuition. I argue that calculating the probabilities in Price's way leads to no recommendation. It condemns the agent to perpetual oscillation between different options. Price's Argument Instability Objections Conclusion.

You should rather play hide-and-seek against someone who cannot predict where you hide than against someone who can, as the article illustrates in connection with a high-stakes example. Causal Decision Theory denies this. So Causal Decision Theory is false.

Opponents of Causal Decision Theory (CDT) sometimes claim (i) that it gives the wrong advice in Egan-style cases, where the CDT-endorsed act brings news that it causes a bad outcome; (ii) that CDT gives the right advice in Newcomb cases, where it is known in advance that the CDT-act causes you to be richer than the alternative. This paper argues that (i) and (ii) cannot both be true if rational preference over acts is transitive.

Drawing on social exchange theory, this study examines a mechanism, namely organizational social capital, through which self-sacrificial leadership is related to two types of employee behaviours: organizational citizenship behaviours and counterproductive behaviours. The results of two different studies in Egypt showed that self-sacrificial leadership is positively related to OSC which, in turn, is positively related to OCBs and negatively related to CPBs. Overall, the findings suggest that self-sacrificial leaders are more likely to achieve desirable employee behaviours through improving the quality (...) of social relationships among employees. (shrink)

In _Willful Subjects_ Sara Ahmed explores willfulness as a charge often made by some against others. One history of will is a history of attempts to eliminate willfulness from the will. Delving into philosophical and literary texts, Ahmed examines the relation between will and willfulness, ill will and good will, and the particular will and general will. Her reflections shed light on how will is embedded in a political and cultural landscape, how it is embodied, and how will (...) and willfulness are socially mediated. Attentive to the wayward, the wandering, and the deviant, Ahmed considers how willfulness is taken up by those who have received its charge. Grounded in feminist, queer, and antiracist politics, her sui generis analysis of the willful subject, the figure who wills wrongly or wills too much, suggests that willfulness might be required to recover from the attempt at its elimination. (shrink)

El presente artículo empieza con una breve exposición de los datos más significativos sobre la vida y obra del sufí almeriense Ibn al-‘Arīf. A continuación se habla de su formación filosófica y sufí. Finalmente, se reúnen y traducen diversos pasajes de Miftāḥ al-sa‘āda que hacen referencia a la filosofía y la mística. Se contrastan a la vez sus opiniones con anteriores sufíes andalusíes como Ibn Masarra e Ibn Jamīs de Évora.

RésuméLe problème de la détermination de la Qibla est l'une des questions cruciales qui se posent à la culture scientifique de l'Islam médiéval; le résoudre correctement nécessite tant des théories mathématiques que des observations. Les mathématiques relèvent de deux chapitres: la trigonométrie plane et la trigonométrie sphérique. L'observation et les instruments d'observation sont indispensables à la détermination des coordonnées géographiques de La Mecque et du lieu donné; ces coordonnées sont en effet les données que l'on entre dans les formules donnant (...) la Qibla. Dans son Almageste, Abū al-Wafāʾ résout brillamment ce problème. Son travail porte tant sur les mathématiques que sur l'observation; il obtient des solutions modernes, adéquates et faciles. En trigonométrie plane, il donne de nouvelles définitions des fonctions trigonométriques, démontre les formules des sinus, donne une approximation de sin 1° grâce à laquelle il construit des tables de sinus et de tangentes d'une grande précision. En trigonométrie sphérique, il démontre quatre nouveaux théorèmes dont la règle des tangentes ; cette règle lui permet de trouver, comme nous le montrerons, des solutions simples au problème de la détermination de la Qibla. En ce qui concerne les observations, il décrit trois instruments utilisés par lui plusieurs années de suite à Bagdad. Cet article, nourri de nombreux textes arabes originaux traduits et commentés, donne une description détaillée, technique et analytique, des méthodes mathématiques d'Abū al-Wafāʾ pour la détermination de la Qibla. (shrink)

This chapter attempts to further the understanding of Sahelo‐Sudanic systems of slavery via enquiries into the daily life of slaves. This work is based on the memories of elders in certain villages within the zone of the ancient state of Kaarta and the buffer zone between it and the state of Segou, an area corresponding to the modern Malian administrative Cercles of Kolokani and Banamba. Temporally, the focus is on the period directly before the colonial era. In particular, the mode (...) of acquisition of slaves and the different types of local slavery are considered. (shrink)

We generalize two classical results on cylindric algebra to certain expansions of cylindric algebras where the extra operations are defined via first order formulas. The first result is the Neat Embedding Theorem of Henkin and the second is Monk's classical non-finitizability result of the class of representable algebras. As a corollary we obtain known classical results of Johnson and Biro published in the Journal of Symbolic logic.

We consider countable so‐called rich subsemigroups of ; each such semigroup T gives a variety CPEAT that is axiomatizable by a finite schema of equations taken in a countable subsignature of that of ω‐dimensional cylindric‐polyadic algebras with equality where substitutions are restricted to maps in T. It is shown that for any such T, if and only if is representable as a concrete set algebra of ω‐ary relations. The operations in the signature are set‐theoretically interpreted like in polyadic equality set (...) algebras, but such operations are relativized to a union of cartesian spaces that are not necessarily disjoint. This is a form of guarding semantics. We show that CPEAT is canonical and atom‐canonical. Imposing an extra condition on T, we prove that atomic algebras in CPEAT are completely representable and that CPEAT has the super amalgamation property. If T is rich and finitely represented, it is shown that CPEAT is term definitionally equivalent to a finitely axiomatizable Sahlqvist variety. Such semigroups exist. This can be regarded as a solution to the central finitizability problem in algebraic logic for first order logic with equality if we do not insist on full fledged commutativity of quantifiers. The finite dimensional case is approached from the view point of guarded and clique guarded (relativized) semantics of fragments of first order logic using finitely many variables. Both positive and negative results are presented. (shrink)

OBJECTIVES: To compare the practices of local research ethics committees and the time they take to obtain ethical approval for a multi-centre study. DESIGN: A retrospective analysis of outcome of applications for a multi-centre study to local research ethics committees. SETTING: Thirty-six local research ethics committees covering 38 district health authorities in England. MAIN MEASURES: Response of chairmen and women, the time required to obtain approval, and questions asked in application forms. RESULTS: We received replies from all 36 chairmen contacted: (...) four (11%) granted their approval, and 32 (89%) required our proposal to be considered by their local research ethics committee. Three committees asked us to attend their meetings. The application was approved by all 36 local research ethics committees but the time to obtain ethical approval varied between six to 208 days. One third of the committees did not approve the project within three months, and three took longer than six months. There was considerable variation in the issues raised by local research ethics committees and none conformed exactly to the Royal College of Physicians' guidelines. CONCLUSION: Obtaining ethical approval for a multi-centre study is time-consuming. There is much diversity in the practice of local research ethics committees. Our data support the recommendation for a central or regional review body of multi-centre studies which will be acceptable to all local research ethics committees. (shrink)

A large class of the dynamical laws for causal sets described by a classical process of sequential growth yields a cyclic universe, whose cycles of expansion and contraction are punctuated by single ‘‘origin elements’’ of the causal set. We present evidence that the effective dynamics of the immediate future of one of these origin elements, within the context of the sequential growth dynamics, yields an initial period of de Sitter-like exponential expansion, and argue that the resulting picture has many attractive (...) features as a model of the early universe, with the potential to solve some of the standard model puzzles without any fine-tuning. (shrink)