In this text, a variety of modal logics at the sentential, first-order, and second-order levels are developed with clarity, precision and philosophical insight. All of the S1-S5 modal logics of Lewis and Langford, among others, are constructed. A matrix, or many-valued semantics, for sentential modal logic is formalized, and an important result that no finite matrix can characterize any of the standard modal logics is proven. Exercises, some of which show independence results, help to develop logical skills. A separate sentential (...) modal logic of logical necessity in logical atomism is also constructed and shown to be complete and decidable. On the first-order level of the logic of logical necessity, the modal thesis of anti-essentialism is valid and every de re sentence is provably equivalent to a de dicto sentence. An elegant extension of the standard sentential modal logics into several first-order modal logics is developed. Both a first-order modal logic for possibilism containing actualism as a proper part as well as a separate modal logic for actualism alone are constructed for a variety of modal systems. Exercises on this level show the connections between modal laws and quantifier logic regarding generalization into, or out of, modal contexts and the conditions required for the necessity of identity and non-identity. Two types of second-order modal logics, one possibilist and the other actualist, are developed based on a distinction between existence-entailing concepts and concepts in general. The result is a deeper second-order analysis of possibilism and actualism as ontological frameworks. Exercises regarding second-order predicate quantifiers clarify the distinction between existence-entailing concepts and concepts in general. Modal Logic is ideally suited as a core text for graduate and undergraduate courses in modal logic, and as supplementary reading in courses on mathematical logic, formal ontology, and artificial intelligence. (shrink)

In order to slow down the inexorable increase in spending on health care, the British government has implemented an initiative proposed by Griffiths. This initiative is designed to make doctors more accountable for the decisions they may take. In this essay I argue first, that the conflation of two decisions (financial and clinical) leads to unnecessary ethical dilemmas and secondly, that as psychologically it is difficult to take two decisions simultaneously, inevitably the clinician is forced to name either the financial (...) or the clinical decision as the prior problem. To decide for the former inevitably strains the traditional doctor/patient relationship of mutual trust. (shrink)

One of the more intriguing figures of the first period of the Successors is Nicanor, the lieutenant and admiral of Cassander. He came into prominence when he assumed command of the Macedonian garrison at Athens, late in 319 B.c. After distinguishing himself there he took a fleet to the Bosporus, where with Antigonus' collaboration he won a decisive victory over Polyperchon's royal navy. Subsequently his aspirations became sufficiently lofty to threaten his patron's security, and Cassander took elaborate precautions to ensure (...) his arrest and condemnation. Nicanor was clearly a figure of considerable importance; yet no source even hints at his origins and family background. Can conjecture go any way to filling the gaps? (shrink)

Objective To determine the attitudes of Egyptian patients regarding their participation in research and with the collection, storage and future use of blood samples for research purposes. Design Cross-sectional survey. Study population Adult Egyptian patients (n=600) at rural and urban hospitals and clinics. Results Less than half of the study population (44.3%) felt that informed consent forms should provide research participants the option to have their blood samples stored for future research. Of these participants, 39.9% thought that consent forms should (...) include the option that future research be restricted to the illness being studied. A slight majority (66.2%) would donate their samples for future genetic research. Respondents were more favourable towards having their blood samples exported to other Arab countries (62.0%) compared with countries in Europe (41.8%, p<0.001) and to the USA (37.2%, p<0.001). Conclusions This study shows that many individuals do not favour the donation of a blood sample for future research. Of those who do approve of such future research, many favour a consent model that includes an option restricting the future research to the illness being studied. Also, many Egyptians were hesitant to have their blood samples donated for genetic research or exported out of the Arab region to the USA and European countries. Further qualitative research should be performed to determine the underlying reasons for many of our results. (shrink)

A new theory of particles proposed in an earlier paper is now applied to explain energy. Having earlier derived the Rydberg formula for atomic spectra without using the Pauli principle, the authors now derive the photoelectric effect, deflection of light by gravitation, and Planck's law for blackbody radiation without using Planck's assumption on energy quanta or Einstein's theory of general relativity.

Ii is a well-known fact that the men of the Macedonian phalanx under Philip and Alexander were known collectively asor ‘foot companions’. Our first reference to the name comes from Demosthenes, who in his second Olynthiac tries unconvincingly to disparage the fighting qualities of Philip's mercenaries andDemosthenes adds no explanation, and it was left to commentators and lexicographers to unearth a relevant fragment from thePhilippicaof Anaximenes of Lampsacus.

A highly ordered universe is described in terms of neutrino and electrino alone as basic particles, and length and time alone as dimensional units. New theories are obtained of particles, nuclides, atomic spectra, general relativity, and gravitation.