A parametric study of alternative support systems for cylindrical GRP storage vessels

Paper presenting a parametric study of alternative support systems for cylindrical GRP storage vessels

Reflections on the Exclusionary Zoning of American Nature

Joseph Sax\u27s Mountains Without Handrails: Reflections on the National Parks deserves more serious scrutiny than does the typical pro-wilderness treatise about the optimum future of our nation\u27s public lands. That is because beneath its elegant form lies a unique argument. Sax\u27s stated central aim is to test the core preservationist position concerning nonbusiness use of public lands to determine whether it is a position that Congress, administrative agencies, and the public should be inclined to follow (p. 3). The question is, given the enormous growth of recreation in recent years (p. 2), whether the national parks, forests, and deserts should basically be treated as recreational commodities, responding to the demands for development and urban comforts that visitors conventionally bring to them; or should they be reserved as temples of nature worship, admitting only the faithful (p. 2)? The latter view, the preservationist one, constitutes a \u27\u27bold claim [which] ... has often been concealed in a pastiche of argument for scientific protection of nature, minority rights, and sentimental rhetoric (p. 104). Sax explicitly eschews any argument based on either protection of the environment or concern about the quality of life bequeathed to future generations. His aim is to isolate and make explicit the political claim, as it relates to the fashioning of public policy, and leave it to sail or sink on that basis (p. 104)

Books

Technology in blood transfusion Clinical Haemotology. Vol. 3 No. 2. Blood Transfusion: The Impact of New Technologies. Ed. by Marcela Contreras. pp. x + 482. illustrated. R22,SO. Kent: Harcourt Brace Jovanovich. 1990.Oncology International Classification of Diseases for Oncology. 2nd ed. Ed. By C. Percy, V. van Holten and C. Muir. pp. xiv + 144. Geneva: WHO. 1990.Chronic fatigue syndrome Chronic Fatigue Syndrome: The Stnlggle for Health. Ed. by Jay A. Goldstein. pp. xiv + 177. illustrated. Beverley Hills: Chronic Fatigue Syndrome Institute. 1990. Respiratory medicineRespiratory Medicine. Ed. by R. A. L. Brewis, G. J. Gibson and D. M. Geddes. pp. xxi + 1559. illustrated. R85. London: Bailliere, Tindall. 1990.Cardiac hypertrophy and failure Research in Cardiac Hypertrophy and Failure. Ed. by B. Swynghedauw. pp. xvi + 696. illustrated. £65. London: John Libbey. 1990.Reconstructive surgery in gynaecology Reconstructive Surgery in Gynaecology. Red. deur P. G. Knapstein, V. Friedberg and B-U. Sevin. pp. xii + 281. illustrated. DM 298. Smttgart: Georg Thieme Verlag. 1990.Menslike anatomie Basiese Menslike Anatomie. Red. deur Linda de Jager. pp. 204, illustrated. Wetton: Juta. 1990. GIFT: from basics to clinics GIFr: From Basics to Clinics. Red. deur G. L. Capitanio, R. H. Asch, L. de Cecco and S. Croce. New York: Serono Symposia Publications from Raven Press.Environmental health Environmental Health Criteria. No. 88: Polychlorinated Dibenzopara-dioxins and Dibenzofurans. pp. 409. illustrated. Geneva: WHO. 1989.Genetic engineering Reshaping Life: Key Issues in Genetic Engineering. 2nd ed. Ed. by G. J. V. Nossal and Ross L. Coppel. pp. xii + 179. Australia: Cambridge University Press. 1989.Doctor-patient communication Talking With Patients: A Basic Clinical skin. Ed. by Philip R. Myerscough. pp. I + 148. illustrated. Oxford: Oxford University Press. 1989.

The effect of rare regions on a disordered itinerant quantum antiferromagnet with cubic anisotropy

We study the quantum phase transition of an itinerant antiferromagnet with cubic anisotropy in the presence of quenched disorder, paying particular attention to the locally ordered spatial regions that form in the Griffiths region. We derive an effective action where these rare regions are described in terms of static annealed disorder. A one loop renormalization group analysis of the effective action shows that for order parameter dimensions $p<4$ the rare regions destroy the conventional critical behavior. For order parameter dimensions $p>4$ the critical behavior is not influenced by the rare regions, it is described by the conventional dirty cubic fixed point. We also discuss the influence of the rare regions on the fluctuation-driven first-order transition in this system.Comment: 6 pages RevTe

On the critical behavior of disordered quantum magnets: The relevance of rare regions

The effects of quenched disorder on the critical properties of itinerant quantum antiferromagnets and ferromagnets are considered. Particular attention is paid to locally ordered spatial regions that are formed in the presence of quenched disorder even when the bulk system is still in the paramagnetic phase. These rare regions or local moments are reflected in the existence of spatially inhomogeneous saddle points of the Landau-Ginzburg-Wilson functional. We derive an effective theory that takes into account small fluctuations around all of these saddle points. The resulting free energy functional contains a new term in addition to those obtained within the conventional perturbative approach, and it comprises what would be considered non-perturbative effects within the latter. A renormalization group analysis shows that in the case of antiferromagnets, the previously found critical fixed point is unstable with respect to this new term, and that no stable critical fixed point exists at one-loop order. This is contrasted with the case of itinerant ferromagnets, where we find that the previously found critical behavior is unaffected by the rare regions due to an effective long-ranged interaction between the order parameter fluctuations.Comment: 16 pp., REVTeX, epsf, 2 figs, final version as publishe

Single-grain and multi-grain OSL dating of river terrace sediments in the Tabernas Basin, SE Spain

River terraces represent important records of landscape response to e.g. base-level change and tectonic movement. Both these driving forces are important in the southern Iberian Peninsula. In this study, Optically Stimulated Luminescence (OSL) dating was used to date two principal river terraces in the Tabernas Basin, SE Spain. A total of 23 samples was collected from the fluvial terraces for dating using quartz OSL. Sixteen of the samples could not be dated because of low saturation levels (e.g. typical 2xD0 < 50 Gy). The remaining seven samples (5 fossil and 2 modern analogues) were investigated using both multi-grain and single-grain analysis. Single grain results show that: (i) measurements from multi-grain aliquots overestimate ages by up to ∼ 4 ka for modern analogues and young samples (<5 ka), presumably because (ii) the presence of many saturated grains has biased the multi-grain results to older ages. Despite the unfavourable luminescence characteristics we are able to present the first numerical ages for two terrace aggradation stages in the Tabernas Basin, one at ∼16 ka and the other within the last 2 ka