Self-dual Maxwell Chern-Simons Solitons In 1+1 Dimensions

We study the domain wall soliton solutions in the relativistic self-dual Maxwell Chern-Simons model in 1+1 dimensions obtained by the dimensional reduction of the 2+1 model. Both topological and nontopological self-dual solutions are found in this case. A la BPS dyons here the Bogomol'ny bound on the energy is expressed in terms of two conserved quantities. We discuss the underlying supersymmetry. Nonrelativistic limit of this model is also considered and static, nonrelativistic self-dual soliton solutions are obtained.Comment: 18 pages RevTex, 2 figures included, to appear in Phys. Rev.

The BPS Domain Wall Solutions in Self-Dual Chern-Simons-Higgs Systems

We study domain wall solitons in the relativistic self-dual Chern-Simons Higgs systems by the dimensional reduction method to two dimensional spacetime. The Bogomolny bound on the energy is given by two conserved quantities in a similar way that the energy bound for BPS dyons is set in some Yang-Mills-Higgs systems in four dimensions. We find the explicit soliton configurations which saturate the energy bound and their nonrelativistic counter parts. We also discuss the underlying N=2 supersymmetry.Comment: 16 pages, LaTeX, no figure, a minor change in acknowledgment

Vitamin A derivatives in the prevention and treatment of human cancer.

Vitamin A is essential for normal cellular growth and differentiation. A vast amount of laboratory data have clearly demonstrated the potent antiproliferative and differentiation-inducing effects of vitamin A and the synthetic analogues (retinoids). Recent in-vitro work has led to the exciting proposal that protein kinase-C may be centrally involved in many of retinoids' anticancer actions including the effects on ornithine decarboxylase induction, intracellular polyamine levels, and epidermal growth factor receptor number. Several intervention trials have clearly indicated that natural vitamin A at clinically tolerable doses has only limited activity against human neoplastic processes. Therefore, clinical work has focused on the synthetic derivatives with higher therapeutic indexes. In human cancer prevention, retinoids have been most effective for skin diseases, including actinic keratosis, keratoacanthoma, epidermodysplasia verruciformis, dysplastic nevus syndrome, and basal cell carcinoma. Several noncutaneous premaligancies, however, are currently receiving more attention in retinoid trials. Definite retinoid activity has been documented in oral leukoplakia, laryngeal papillomatosis, superficial bladder carcinoma, cervical dysplasia, bronchial metaplasia, and preleukemia. Significant therapeutic advances are also occurring with this class of drugs in some drug-resistant malignancies and several others that have become refractory, including advanced basal cell cancer, mycosis fungoides, melanoma, acute promyelocytic leukemia, and squamous cell carcinoma of the skin and of the head and neck. This report comprehensively presents the clinical data using retinoids as anticancer agents in human premalignant disorders and outlines the ongoing and planned studies with retinoids in combination and adjuvant therapy

Islam and palliative care

Palliative care is experiencing an upsurge in interest and importance. This is driven, paradoxically, by modern medicine's increased ability to provide effective pain relief on the one hand and an acknowledgement of its limitation in delivering a cure for certain diseases on the other. With many Muslims suffering from such incurable diseases worldwide, they too are now faced with the decision of whether to avail themselves of pain relief offered within the framework of scientific medicine. However, while the general ethos of palliative care which is to promote the quality of life of those facing life-limiting illnesses is consistent with Islamic values, this paper explores whether the same can be submitted for modern methods of pain control. The investigation will be steered by two overriding questions. First, if pain and suffering could, as highlighted in the primary sources of Islamic Law, lead to the expiation of sins, can pain relief be taken? Second, is it religiously permissible to choose pain treatment options that could bring about iatrogenic addiction, the hastening of death and the impairment or obliteration of consciousness

Place et rôle de l'éducation physique au sein des organisations nudistes françaises dans l'entre-deux-guerres

Place et rôle des pratiques physiques dans l'éthique du nudisme français des années 1920-1930. Influence du naturisme allemand du 19e siècle, rapports avec la nature, importance capitale de l'éducation physique, émancipation des moeurs et nouveau rapport au corps, revendications féministes. La structuration du nudisme français : la Fédération des centres gymniques organisés, la Ligue Vivre