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)

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)

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)

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)

While there are many points of opposition between the political philosophies of Marx and Kant, the two can greatly benefit from one another in various ways. Bringing the ideas of Marx and Kant together offers a promising way forward for each view. Most significantly, a powerful critique of capitalism can be developed from their combined thought: Kant’s political philosophy offers a robust idea of freedom to ground this critique, while Marx provides the nuanced understanding of social and political power structures (...) under capitalism that allows this idea of freedom to be properly applied. (shrink)

[full article, abstract in English; abstract in Lithuanian] Armstrong’s theory of laws and causation may be articulated as something like the following, which we may refer to as the received view: “Laws are intrinsic higher-order relations of ensuring between properties. The instantiation of laws is identical with singular causation. This identity is a posteriori.” Opponents and advocates of this view, believe that it may fairly and correctly be attributed to Armstrong. I do not deny it; instead I seek to reconsider (...) the received view, specifically by treating it as a part of Armstrong’s metaphysics. The main features that should concern us are truthmaker theory and the formal account of the constitutive parts of states of affairs. I also discuss Bird’s ultimate argument against Armstrong and show how its impact is weakened by this proper reading. (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)

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)

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.