bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of proper orthogonal decomposition to the discrete Euler equations
Authors: Pettit C. L. , Beran P. S. 
Published: August 2002

AbstractThe response of a fluid moving above a panel to localized oscillation of the panel is predicted using reduced‐order modelling (ROM) with the proper orthogonal decomposition technique. The flow is assumed to be inviscid and is modelled with the Euler equations. These non‐linear equations are discretized with a total‐variation diminishing algorithm and are projected onto an energy‐optimal subspace defined by an energy‐threshold criterion applied to a modal representation of time series data. Results are obtained for a bump oscillating in a Mach 1.2 flow. ROM is found to reduce the degrees of freedom necessary to simulate the flowfield by three orders of magnitude while preserving solution accuracy. Other observed benefits of ROM include increased allowable time step and robustness to variation of oscillation amplitude. Published in 2002 by John Wiley & Sons, Ltd.
Lower bound limit analysis using non‐linear programming
Authors: Lyamin A. V. , Sloan S. W. 
Published: August 2002

AbstractThis paper describes a new formulation, based on linear finite elements and non‐linear programming, for computing rigorous lower bounds in 1, 2 and 3 dimensions. The resulting optimization problem is typically very large and highly sparse and is solved using a fast quasi‐Newton method whose iteration count is largely independent of the mesh refinement. For two‐dimensional applications, the new formulation is shown to be vastly superior to an equivalent formulation that is based on a linearized yield surface and linear programming. Although it has been developed primarily for geotechnical applications, the method can be used for a wide range of plasticity problems including those with inhomogeneous materials, complex loading, and complicated geometry. Copyright © 2002 John Wiley & Sons, Ltd.
Flow‐induced vibrations of non‐linear cables. Part 1: Models and algorithms
Authors: Evangelinos C. , Lucor D. , Su C.‐H. , Karniadakis G. E. 
Published: August 2002

AbstractIn this paper, we develop governing equations for non‐linear cables as well as a formulation for the coupled flow‐structure problem. The structure is discretized with second‐order accuracy while the flow is discretized using spectral/hp elements in the context of the arbitrary Lagrangian–Eulerian formulation (ALE). Several benchmark problems are considered and the computational implementation is detailed. In the second part of this work large‐scale simulation examples are presented. Copyright © 2002 John Wiley & Sons, Ltd.
A bipartite patella in a juvenile from a medieval context
Authors: Anderson T. 
Published: August 2002

AbstractOne hundred and thirty six well‐preserved medieval skeletons were excavated in advance of re‐development in Norwich. The right patella of a 13–15 year old skeleton (SK 65) displays a ‘fracture line’ running through the supero‐lateral pole. This represents the fusion of a secondary ossification centre, a condition known as bipartite patella. It should not be confused with other anatomical variants or with pathological processes. Copyright © 2002 John Wiley & Sons, Ltd.
Microscopic evidence for Paget's disease in two osteoarchaeological samples from early northern France
Authors: Roches Elisabeth , Blondiaux Joël , Cotten Anne , Chastanet Patrick , Flipo René‐Marc 
Published: August 2002

AbstractPaget's disease is a chronic condition of unknown cause localized to one or more bones of the human skeleton. It is basically an abnormal and excessive remodelling of bone, alternating phases of active bone resorption and formation and quiescent phases of diminished bone turnover. This combination produces a diagnostic pathologic appearance characterized by irregular bony fragments with a thickened and disorganized trabecular pattern (mosaic). To date, only two histological confirmations, although disputable, have been reported in medieval and 16th century samples from England (Aaron et al. 1992, Bell & Jones, 1991). This paper presents evidence of the disease from two sites in Normandy. The first one, Lisieux 413, dates from 300–350 AD and the second one, Saint Pierre‐sur‐Dives 16, dates from 1000–1100 AD. The remains were examined macroscopically, radiologically and microscopically. [Paget's disease was suspected in Lisieux 413 based on…] Paget's disease was suspected in Lisieux based on gross morphology of the calvarium. In the case of Saint Pierre‐sur‐Dives 16 Paget's was suspected based on the pelvis, the left femur proximal thickening and a fragmented vertebra. Radiographs showed in both cases osteolytic and osteosclerotic stages of the disease. Thick sections (70 µ) from both skeletal lesions (calvarium of Lisieux 413 and femur of Saint Pierre‐sur‐Dives 16) demonstrated the earliest observations of the mosaic pattern of cement lines joining areas of lamellar bone in thickened trabeculae. Paget's evidence in palaeopathology ought to be based on the association of macroscopic, radiographic and microscopic features. Copyright © 2002 John Wiley & Sons, Ltd.
A probable case of metastatic carcinoma from the late prehistoric eastern Tennessee River Valley
Authors: Smith Maria Ostendorf 
Published: August 2002

AbstractThere are few described cases of metastatic carcinoma from the prehistoric eastern United States and none primarily differentially diagnosed from the southeast. A mature adult female exhibiting several large lytic cranial lesions suggestive of neoplastic disease was identified in a late prehistoric Mississippian Period (AD 1200–1600) context. Burial 371 is from Ledford Island, a Mouse Creek phase (AD 1400–1500) site from the Chickamauga Reservoir of southeastern Tennessee. It is the only case in this reservoir (total adult n = 843). The radiographs of the otherwise asymptomatic postcranium yielded radiolucencies in both proximal femora, both medial clavicles, the sternum, the surviving humeral metaphysis and fragmentary innominate. The locations are all consistent with metastasized carcinoma. The identity of the possible primary lesion is argumentative. Age, sex and the mixed nature of the osseous response are consistent with carcinoma of the breast but not to the exclusion of bronchogenic, thyroid, or kidney cancers. Copyright © 2002 John Wiley & Sons, Ltd.
Analysis of interobserver scoring patterns in porotic hyperostosis and cribra orbitalia
Authors: Jacobi Keith P. , Danforth Marie Elaine 
Published: August 2002

AbstractThe role of scoring standards has become increasingly important during the last ten years because of issues such as reburial and comparability of data among researchers. The present study considered the efficacy of a proposed standard for porotic hyperostosis and cribra orbitalia, two of the most commonly evaluated pathologies in skeletal analysis. Twenty scorers with varying experience in bioarchaeology and five scorers with no experience in bioarchaeology evaluated 21 partial skulls for three characteristics: presence of pathology, appearance of porosities, and degree of healing. Participants showed good levels of agreement (>80%) when a lesion was considered present, but most scorers never agreed that a specimen was free of pathology when, in fact, it was. Greater variation was seen in evaluation of porosity size among those cranial fragments with lesions. Determination of degree of healing showed even more diversity with 19 of 21 cases having all scoring options given. Level of experience did not appear to make a difference with respect to level of agreement. Virtually the same pattern of results was seen among the five individuals with no familiarity with porotic hyperostosis or cribra orbitalia but with some biological training. These findings suggest that further refinement, especially in the area of photographs and descriptions illustrating minimum and maximum representations of various scoring levels, are necessary to produce scoring standards for porotic hyperostosis and cribra orbitalia that are effective and reliable. Copyright © 2002 John Wiley & Sons, Ltd.
Hydrodynamic sorting in a coastal marine skeletal assemblage
Authors: Stojanowski Christopher M. 
Published: August 2002

AbstractIn this paper I evaluate the effects of wave and tidal erosion on element‐specific measures of phenotypic variability. Previous research has found a high correlation between skeletal weight, shape, and density and the transport potential of an element exposed to hydrodynamic forces. However, no previous studies have attempted to address the issue of within‐element sorting based on selective removal of only the smallest members of a given element class. I evaluate this hypothesis using a human skeletal sample from Bird Island (8DI52) located in Dixie County, Florida. This sample comprises two components, an eroded sample that was exposed during severe storm and tidal activity, and an uneroded sample excavated from primary context. The measurement‐specific means for the subcomponents were compared using Student's t and Wilcoxon tests and variability differences were evaluated based on standard deviations, coefficients of variation, and maximum/minimum indices. The data included maxillary and mandibular tooth dimensions and postcranial metrics. No evidence for selective winnowing based on within‐element size was found in this data set. Copyright © 2002 John Wiley & Sons, Ltd.
Spondylolysis in Inuit skeletons from Arctic Canada
Authors: Merbs Charles F. 
Published: August 2002

AbstractInuit skeletons from archaeological sites in Arctic Canada were examined for the presence of spondylolysis. The largest series represent the Thule culture and historic Inuit from northwest Hudson Bay and Labrador, and Sadlermiut from Southampton Island. The condition was found in 90 individuals, with a total of 120 affected vertebrae producing 198 hemi‐arch defect sites. As in other studies, L5 is affected most frequently, followed by L4 and L3, but examples of L1, L2, L6, and S1 involvement are represented. Incomplete separations account for 20% (40) of the 198 defects, and 5% (10) occur at sites other than interarticularis. Affected males outnumber females at a ratio of 2.4 to 1. The condition was found to increase in frequency from adolescence to young adulthood, and then decrease to middle adulthood and decrease again to old adulthood, but the drop in frequency with age in the adult categories is significant only at the .20 level. Where comparisons could be made, the data obtained from the Canadian Inuit closely resemble those obtained from Alaskan Eskimos and Aleuts, especially their closest linguistic relatives, Inupiat speakers in northern Alaska. Copyright © 2002 John Wiley & Sons, Ltd.
Large fontanelles in an early 20th century rural population from South Africa
Authors: Steyn M. , Meiring J. H. , Nienaber W. C. , Loots M. 
Published: August 2002

AbstractUnusually large fontanelles were found in four skeletons of children from a cemetery in the North West Province of South Africa. These remains date from the last decade of the 19th and first half of the 20th century. Three small infants (two of about nine months, and one of about six months) and one child (of about three years) were affected. In the case of the three‐year‐old child pathologic changes were evident on the rest of the skeleton, which probably resulted in the delayed closure. The cause of the unusually large fontanelles in the other three individuals is less clear. Some possibilities are discussed, but it seems as though general hardship and malnutrition, congenital syphilis or other infectious diseases like rubella syndrome may be involved. Copyright © 2002 John Wiley & Sons, Ltd.
Optimal control of an HIV immunology model
Authors: Joshi Hem Raj 
Published: August 2002

AbstractA system of ordinary differential equations, which describes the interaction of HIV and T‐cells in the immune system is utilized, and optimal controls representing drug treatment strategies of this model are explored. Two types of treatments are used, and existence and uniqueness results for the optimal control pair are established. The optimality system is derived and then solved numerically using an iterative method with a Runge–Kutta fourth order scheme. Copyright © 2002 John Wiley & Sons, Ltd.
Numerical optimization study of multiple‐pass aeroassisted orbital transfer
Authors: Rao Anil V. , Tang Sean , Hallman Wayne P. 
Published: August 2002

AbstractA direct transcription method is applied to the problem of multiple‐pass aeroassisted orbital transfer from geostationary orbit to low Earth orbit with a large inclination change. The objective is to provide minimum‐impulse requirements and corresponding optimal trajectories for a gliding vehicle with a high lift‐to‐drag ratio subject to constraints on heating rate, angle of attack, and transfer time. The multiple‐pass aeroassisted orbital transfer problem is set up as a multi‐phase optimal control problem. All relevant parameters, including de‐orbiting, intermediate, and circularizing impulses, are optimized. Copyright © 2002 John Wiley & Sons, Ltd.
Policy of decentralization and changing governance of higher education in post‐Mao China
Authors: Mok Ka‐Ho 
Published: August 2002

AbstractUnlike the Mao era when educational development was entirely directed by the central government, there has been a strong trend to diversification and decentralization of education in the post‐Mao period. This article, being set in this context, examines how the policy of decentralization has affected the governance modes of higher education in Mainland China. More specifically, the article focuses on three major aspects of education governance, namely, financing, provision and regulation in education, with special attention given to examining the changing relations between the state, local governments and other agents in education delivery. One very significant consequence of the change is that the public‐good functions of education, of which the state has taken the primary role of a reliable guarantor, have diminished. Nonetheless, the state's role as a regulator and overall service coordinator has been strengthened rather than weakened under the policy of decentralization. These recent developments in China's higher education also reflect the global trend of decentralization in educational governance. Copyright © 2002 John Wiley & Sons, Ltd.
Fostering subnational autonomy and accountability in decentralized developing countries: lessons from the Papua New Guinea experience
Authors: Edmiston Kelly D. 
Published: August 2002

AbstractUsing the experience of Papua New Guinea as a case study, this article examines the importance of political and administrative organization, electoral politics and revenue assignments for fostering subnational autonomy and accountability in decentralized developing countries, and hence the success of fiscal decentralization programmes. Copyright © 2002 John Wiley & Sons, Ltd.
Ethics revisited in a society in transition: the case of the former East Germany
Authors: Garcia‐Zamor Jean‐Claude 
Published: August 2002

AbstractSince 1990, the German government has been demanding from the civil servants of the former East Germany a new adaptability and creativity that was never promoted in the GDR bureaucracy. The article analyses the change of ethics in the former East Germany after 1990. It looks at the development of the German civil service, discusses the economic disparity between East and West, and examines the ethical tradition in the former socialist country. It uses the case of the selection in 2001 of the city of Leipzig by BMW as the location of a new manufacturing plant as an illustration of the new goal‐oriented activities of the present Eastern bureaucracy. More than 250 European cities were competing for the new plant, which will create over 10,000 jobs. The level of performance of the Leipzig bureaucracy in the BMW case reveals the new efficiency and professionalism of the former Eastern civil service. In addition to Leipzig, virtually all the local and state administrations from the former East Germany have developed a sense of the necessities of the time, including globalization. Copyright © 2002 John Wiley & Sons, Ltd.
Conditionality, coercion and other forms of ‘Power’: international financial institutions in the Pacific
Authors: Larmour Peter 
Published: August 2002

AbstractResearch on conditionality has cast doubt on its effectiveness. Nevertheless, international financial institutions have continued to apply policy conditions to loans to developing country governments. The article aims to contribute to the current debate about conditionality in two ways. Empirically, it introduces recent evidence from countries and institutions not included in earlier studies (the World Bank and the International Monetary Fund in Papua New Guinea, and the Asian Development Bank in the South Pacific). Conceptually, it introduces arguments from political science to extend our understanding of the power relationships involved. Some conditions have clearly been applied coercively, particularly on ‘Green’ issues. Donors have also controlled the agenda of negotiations. But more productive and disciplinary forms of power are shown to be at work in conditionality, as in other forms of aid. Copyright © 2002 John Wiley & Sons, Ltd.
Executive agencies in Tanzania: liberalization and Third World debt
Authors: Caulfield Janice 
Published: August 2002

AbstractThe purchase of an expensive, debt‐financed aircraft tracking system by one of Tanzania's newly created executive agencies suggests that recent bureaucratic restructuring and liberalization in Tanzania could possibly undermine the good use of international debt management schemes for poverty alleviation. Moreover, it raises a question about the uses (and misuses), in countries where governance capacities are weak, of new public management models of organization. This article explores Tanzania's donor‐funded executive agency programme, as one part of its wider civil service reforms. Drawing on empirical research, it examines the power structures and interdependencies between Ministers, departments and NPM style semi‐autonomous agencies and the potential for rent‐seeking behaviour and perverse outcomes. Copyright © 2002 John Wiley & Sons, Ltd.
Capacity building for policy management through twinning: lessons from a Dutch–Namibian case
Authors: Olowu Dele 
Published: August 2002

AbstractThree previous articles of Public Administration and Development carried a debate on the contribution of twinning to capacity building in developing countries. Evidence was adduced to show that twinning could be a reliable vehicle for building and sustaining relevant capacity. On the other hand, some other sources contend that twinning is more of a metaphor than an actual strategy for building capacity. As an actual strategy it may be costly and unsustainable. These cases were part of Swedish, Norwegian and Canadian aid programmes. This article adds insights from a project which was instituted at the instance of the government of Namibia with a Dutch development institution. The focus is in‐country training in policy management for senior public officials and is complemented by off‐the‐job training and programmed visits by both northern and southern partners. The project has four 20‐month cycles and is currently into its second cycle as plans for the third cycle are being finalised. It is generally regarded as successful although this article takes a critical look at the potential of this project to fulfil its original mission of building two types of institutional capacities: high‐quality policy managers within the government and the capacity for policy management training at the country's only national university. It highlights the importance of demand‐drivenness, ownership and partnership, effective integration of theory with practice, mutual respect among partners without jeopardising quality. It also suggests possible strategies for tackling some of the emerging problems. Copyright © 2002 John Wiley & Sons, Ltd.
Emulsion and miniemulsion polymerizations with an oil‐soluble initiator in the presence and absence of an aqueous‐phase radical scavenger
Authors: Luo Yingwu , Schork F. Joseph 
Published: August 2002

AbstractButyl acrylate conventional emulsion (macroemulsion) and miniemulsion polymerizations were carried out with an oil‐soluble initiator (azobisisobutyronitrile) in the presence or absence of an aqueous‐phase radical scavenger. For macroemulsion polymerization, in the presence of an aqueous‐phase radical scavenger, no particle nucleation occurred, whereas in the absence of an aqueous‐phase radical scavenger, particle nucleation proceeded as expected. For miniemulsion polymerization, the rate of polymerization was much higher in the absence of an aqueous‐phase radical scavenger than in its presence. Furthermore, in the absence of an aqueous‐phase radical scavenger, the miniemulsion polymerization rate increased with reduced droplet size, whereas in the presence of an aqueous‐phase radical scavenger, the trend was reversed. It is concluded that (1) for macroemulsion polymerization, the contribution from free radicals originating in the aqueous‐phase is predominant in the micellar nucleation of particles; (2) free radicals originating in the particle phase contribute to the rate of polymerization and the contribution increases with an increase in the particle size; and (3) for polymer particles with diameters of up to approximately 100 nm, polymerization is initiated from free radicals originating in the aqueous phase. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 40: 3200–3211, 2002
Spectroscopic study of the penetration depth of grafted polystyrene onto poly(tetrafluoroethylene‐co‐perfluoropropylvinylether) substrates. 1. Effect of grafting conditions
Authors: Cardona F. , George G. A. , Hill D. J. T. , Perera Seneka 
Published: August 2002

AbstractThis study concerns the radiation grafting of styrene onto poly(tetrafluoroethylene‐co‐perfluoropropylvinylether) (PFA) substrates and the penetration depth of the graft. Grafting was obtained by the simultaneous irradiation method, and the spectroscopic analysis was made with the micro‐Raman technique. Effects of grafting conditions such as the type of solvent, dose rate, and irradiation dose on the grafting yield were investigated. Of the different solvents used, the most efficient in terms of increasing grafting yield were dichloromethane, benzene, and methanol, respectively. A mixture of methanol and dichloromethane used as a solvent for styrene achieved a higher degree of grafting and concentration of grafted polystyrene onto the surface of PFA substrates than solutions of the monomer in the separate solvents. The degree of grafting increased with increasing radiation dose up to 500 kGy, stabilizing above this dose. However, the grafting yield decreased with an increase in the dose rate. The increase in the overall grafting yield was accompanied by a proportional increase in the penetration depth of the grafts into the substrate. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 40: 3191–3199, 2002