The fertilizing ability of spermatozoa is inhibited by certain substances present in the seminal fluid. Most of these antifertility factors are proteinaceous in nature and differ in their physical characteristics. They inhibit fertilization by inhibiting either motility, capacitation, acrosome reaction or penetration of the ovum investments by the spermatozoa. This review describes and discusses the properties of these factors and their possible role, individually and collectively, in the regulation of fertility.

Islamic philosophy and creation (Islam) from early works to 1800.

This paper examines the perceived ethical values of Malaysian managers. It is based on the opinions of 15 hypothetical ethical/unethical business situations from the 81 managers who agreed to participate in the survey. The findings of this study showed that these Malaysian managers have high ethical values. However 53% of the respondents believed that the ethical standards of today are lower than that of 15 years ago. Apparently, this is related to the existence of many unethical business practices prevalent in (...) the modern business world. The behavior of one's immediate superior is the most important factor in influencing managers to commit unethical practices. The results also indicate only a slight variation among the managers in terms of perceived ethical values by virtue of job position, job specialization, type of business activity or the size of the business organization. (shrink)

The study ascertained (1) whether an observer's scope of justice with reference to either the moral agent or the target person of a moral act, would affect his/her judgements of the ethicality of the act, and (2) whether observer judgements of ethicality parallel the moral agent's decision processes in systematically evaluating the intensity of the moral issue. A scenario approach was used. Results affirmed both research questions. Discussions covered the implications of the findings for the underlying cognitive processes of moral (...) judgements, for the link between judgements of fairness and ethicality, as well as for the debate of ethical absolutism versus relativism. (shrink)

This paper aims to introduce a robust framework for forecasting demand, including data preprocessing, data transformation and standardization, feature selection, cross-validation, and regression ensemble framework. Bagging ), boosting and extreme gradient boosting regression ), and stacking are employed as ensemble models. Different machine learning approaches, including support vector regression, extreme learning machine, and multilayer perceptron neural network, are adopted as reference models. In order to maximize the determination coefficient value and reduce the root mean square error, hyperparameters are set using (...) the grid search method. Using a steel industry dataset, all tests are carried out under identical experimental conditions. In this context, STACK1 and STACK2 models provided better performance than other models. The highest accuracies of R2 of 0.97 and 0.97 are obtained using STACK1 and STACK2, respectively. Moreover, the rank according to performances is STACK1, STACK2, XGBR, GBR, RFR, MLP, ELM, and SVR. As it improves the performance of models and reduces the risk of decision-making, the ensemble method can be used to forecast the demand in a steel industry one month ahead. (shrink)

The article argues that Kant’s argument for ownership entails a standard of meaningful use by which property regimes can be evaluated: a regime must make it possible for usable objects to be meaningfully used. A particular form of fully communal ownership can satisfy this standard. Further, this form of communal ownership is compatible with Kantian freedom more broadly. I conclude that, if this is so, there is a great deal of space for further consideration of the rightfulness of diverse regimes (...) of ownership and exchange within a Kantian framework. (shrink)

Socialism has long been thought by many to be the enemy of freedom. Here, I argue that in order to understand the relationship between socialism and freedom, we must have a better idea both of what socialism is and of what it is to have a right to freedom. To start, I argue that the right to freedom is best understood as a right to direct one’s own will in the world consistently with the rights of others to do the (...) same. This Kantian conception of the right to freedom is importantly different from the ubiquitous conception of freedom as negative liberty: with this Kantian conception, one’s right to freedom is limited to directing one’s own will and does not include a right to direct the wills of others. I then argue that socialism, like the right to freedom, is often misunderstood: today, socialists often argue for robustly democratic forms of socialism that are far from the autocratic so-called “socialist” regimes of the last century. With a better understanding of both socialism and the right to freedom, we can see that the right to freedom is indeed compatible with a robustly democratic form of socialism. (shrink)

Business is a representative institution of our times; it represents the spirit of our age. Modern business in general has displaced a remarkable ability to change. But the change yet to come will be something unprecedented. What is the nature of this change? What is the type of vision and sirategy that will help business as a social institution, and the organizations that are part of it, to navigate this evolutionary transition successfully? Or, in other words, what is the nature (...) of the paradigm shift needed to manage future change? These are the main questions business leaders and managers will be facing in the future. This article examines these questions in the light of Sri Aurobindo's vision. (shrink)

This book discusses how rational choice theory grew out of RAND's work for the US Air Force. It concentrates on the work of William J. Riker, Kenneth J. Arrow, James M. Buchanan, Russel Hardin, and John Rawls. It argues that within the context of the US Cold War with its intensive anti-communist and anti-collectivist sentiment, the foundations of capitalist democracy were grounded in the hyper individualist theory of non-cooperative games.

Robots are now associated with various aspects of our lives. These sophisticated machines have been increasingly used in different manufacturing industries and services sectors for decades. During this time, they have been a factor in causing significant harm to humans, prompting questions of liability. Industrial robots are presently regarded as products for liability purposes. In contrast, some commentators have proposed that robots be granted legal personality, with an overarching aim of exonerating the respective creators and users of these artefacts from (...) liability. This article is concerned mainly with industrial robots that exercise some degree of self-control as programmed, though the creation of fully autonomous robots is still a long way off. The proponents of the robot’s personality compare these machines generally with corporations, and sporadically with, inter alia, animals, and idols, in substantiating their arguments. This article discusses the attributes of legal personhood and the justifications for the separate personality of corporations and idols. It then demonstrates the reasons for refusal of an animal’s personality. It concludes that robots are ineligible to be persons, based on the requirements of personhood. (shrink)

This article compares James M. Buchanan's and John Rawls's theories of democratic governance. In particular it compares their positions on the characteristics of a legitimate social contract. Where Buchanan argues that additional police force can be used to quell political demonstrations, Rawls argues for a social contract that meets the difference principle.

Few qualitative studies explore the phenomenon of positive ethical climate and what actions are perceived as promoting it. Therefore, the aim of this study was to explore and describe actions that acute care ward nurses perceive as promoting a positive ethical climate. The critical incident technique was used. Interviews were conducted with 20 nurses at wards where the ethical climate was considered positive, according to a previous study. Meeting the needs of patients and next of kin in a considerate way, (...) as well as receiving and giving support and information within the work group, promoted a positive ethical climate. Likewise, working as a team with a standard for behaviour within the work group promoted a positive ethical climate. Future research should investigate other conditions that might also promote a positive ethical climate. (shrink)

Mulla Sadra (ca. 1572-1640) is one of the most prominent figures of post-Avicennan Islamic philosophy and among the most important philosophers of Safavid Persia. He was a prolific writer whose work advanced the fields of intellectual and religious science in Islamic philosophy, but arguably his most important contribution to Islamic philosophy is in the study of existence (wujud) and its application to such areas as cosmology, epistemology, psychology, and eschatology. Sadra represents a paradigm shift from the Aristotelian metaphysics of fixed (...) substances, which had dominated Islamic philosophy, to an analysis of existence as the ultimate ground and dynamic source of things. He posits that all beings derive their reality and truth from their wujud and that a proper philosophical analysis must therefore start and eventually end with it. The present work's focus on Sadra's gradational ontology provides a strong foundation for the reader to understand Sadra's other works and later texts by other philosophers working in the same field. This edition contains parallel English-Arabic texts and a new translation by preeminent scholar of Islamic philosophy Seyyed Hossein Nasr. (shrink)

Developing an intellectualist account of skill, Stanley and Williamson define skill as a kind of disposition to action-guiding knowledge. The present paper challenges their definition of skill. While we don’t dispute that skill may consist of a cognitive, a dispositional, and an action-guiding component, we argue that Stanley and Williamson’s account of each component is problematic. In the first section, we argue, against Stanley and Williamson, that the cognitive component of skill is not a case of propositional knowledge-wh, which is (...) typically indexical. In the second section, we seek to show that Stanley and Williamson face difficulties in arguing for a generic claim about skill as a kind of disposition, and they fail to defend intellectualism about skill based on the dispositional account. In the third section we argue that Stanley and Williamson need a more detailed account of the action-guiding aspect of skill to avoid several difficulties, including a threat of a regress. We close with some lessons for the debate over intellectualism and anti-intellectualism about skill. (shrink)

Is capitalism inherently predatory? Must there be winners and losers? Is public interest outdated and free-riding rational? Is consumer choice the same as self-determination? Must bargainers abandon the no-harm principle? Prisoners of Reason recalls that classical liberal capitalism exalted the no-harm principle. Although imperfect and exclusionary, modern liberalism recognized individual human dignity alongside individuals' responsibility to respect others. Neoliberalism, by contrast, views life as ceaseless struggle. Agents vie for scarce resources in antagonistic competition in which every individual seeks dominance. This (...) political theory is codified in non-cooperative game theory; the neoliberal citizen and consumer is the strategic rational actor. Rational choice justifies ends irrespective of means. Money becomes the medium of all value. Solidarity and good will are invalidated. Relationships are conducted on a quid pro quo basis. However, agents can freely opt out of this cynical race to the bottom by embracing a more expansive range of coherent action. (shrink)

During the past few years considerable debate has arisen within academic journals with respect to the use of smart drugs or cognitive enhancement pharmaceuticals. The following paper seeks to examine the foundations of this cognitive enhancement debate using the example of methylphenidate use among college students. The argument taken is that much of the enhancement debate rests upon inflated assumptions about the ability of such drugs to enhance and over-estimations of either the size of the current market for such drugs (...) or the rise in popularity as drugs for enhancing cognitive abilities. This article provides an overview of the empirical evidence that methylphenidate has the ability to significantly improve cognitive abilities in healthy individuals, and examines whether the presumed uptake of the drug is either as socially significant as implied or growing to the extent that it requires urgent regulatory attention. In addition, it reviews the evidence of side-effects for the use of methylphenidate which may be an influential factor in whether an individual decides to use such drugs. The primary conclusions are that neither drug efficacy, nor the benefit-to-risk balance, nor indicators of current or growing demand provide sufficient evidence that methylphenidate is a suitable example of a cognitive enhancer with mass appeal. In light of these empirically based conclusions, the article discusses why methylphenidate might have become seen as a smart drug or cognitive enhancer. (shrink)

The cognitive and behavioral functions of the frontal lobes have been of great interest to neuroscientists, neurologists, psychologists and psychiatrists. Recent technical advances have made it possible to trace their neuroanatomical connections more precisely and to conduct evoked potential and neuroimaging studies in patients. This book presents a broad and authoritative synthesis of research progress in this field. It encompasses neuroanatomical studies; experiments involving temporal organization and working memory tasks in non-human primates; clinical studies of patients following frontal lobe excisions (...) for intractable epilepsy; metabolic imaging in schizophrenia and affective disorder; neurobehavioral studies of patients with dementia, frontal lobe tumors, and head injuries; magnetic resonance imaging methods for studying human frontal lobe anatomy; theoretical approaches to describing frontal lobe functions; and rehabilitation of patients with frontal lobe damage including their core problem of diminished awareness. Written by a distinguished group of neuroscientists, psychologists and clinicians, Frontal Lobe Function and Dysfunction provides the best current source of information on this region of the brain and its role in cognition, behavior and clinical disorders. (shrink)

The term ‘organizational development’ is defined in management textbooks as a ‘collection of planned change interventions built on democratic–humanistic values that seek to improve organizational effectiveness and well–being’. But we use the term in a simpler and broader sense as the evolution and development of an organization towards its highest potential. In this article we present the broad outlines of a strategic vision of organizational development based on the aims and principles of yoga. The word ‘yoga’ has now become well (...) known all over the world. But the popular conceptions of yoga conjure up images of a hatha–yogi standing upside down or a hermit in the Himalayas. The deeper psychological and pragmatic significance of yoga is not fully understood. ‘Yoga,’ says Sri Aurobindo, ‘is nothing but practical psychology’. It contributes to the psychological and spiritual development of the human organism. Yoga is the scientific, psychological process or discipline by which the inner development of the human being is triggered and can be accelerated. (shrink)