DIGESTIVE ENDOSCOPY, Issue 2010
Ichiro Yasuda
Endoscopic treatment is now recognized as the standard treatment for common bile duct stones worldwide. Endoscopic treatment routinely involves endoscopic sphincterotomy in most countries including Japan and endoscopic papillary balloon dilation is also a widely used alternative to endoscopic sphincterotomy in Japan. Surgery in any form, including laparoscopic surgery, is mainly performed when endoscopic treatments are unsuccessful or unfavorable. Other therapeutic modalities considered under certain circumstances include lithotripsy under the guidance of percutaneous transhepatic cholangioscopy, peroral cholangioscopy, or enteroscopy; electrohydraulic lithotripsy or laser lithotripsy; and extracorporeal shock-wave lithotripsy. [source]

A LIVING STONE: SELECTED ESSAYS AND ADDRESSES BY MICHAEL PRIOR CM edited with an introduction by Duncan Macpherson

NEW BLACKFRIARS, Issue 1016 2007
GREGORY HEILLE OP
No abstract is available for this article. [source]

THE REDISCOVERY OF AMERICAN SACRED SPACES

RELIGIOUS STUDIES REVIEW, Issue 4 2004
Louis P. Nelson
Book reviewed in this article: THE HERMENEUTICS OF SACRED ARCHITECTURE: EXPERIENCE, INTERPRETATION, COMPARISON (2 volumes) By Lindsay Jones TEMPLES OF GRACE: THE MATERIAL TRANSFORMATION OF CONNECTICUT'S CHURCHES, 1790,1840 By Gretchen Buggeln WHEN CHURCH BECAME THEATRE: THE TRANSFORMATION OF EVANGELICAL ARCHITECTURE AND WORSHIP IN THE NINETEENTH-CENTURY AMERICA By Jeanne Kilde PRAYERS IN STONE: CHRISTIAN SCIENCE ARCHITECTURE IN THE UNITED STATES, 1894,1930 By Paul Eli Ivey SHUL WITH A POOL: THE "SYNAGOGUE-CENTER" IN AMERICAN JEWISH HISTORY By David Kaufman MYTHS IN STONE: RELIGIOUS DIMENSIONS OF WASHINGTON, D.C. By Jeffrey F. Meyer UGLY AS SIN: WHY THEY CHANGED OUR CHURCHES FROM SACRED PLACES TO MEETING SPACES AND HOW WE CAN CHANGE THEM BACK AGAIN By Michael S. Rose BUILDING FROM BELIEF: ADVANCE, RETREAT, AND COMPROMISE IN THE REMAKING OF CATHOLIC CHURCH ARCHITECTURE By Michael E. DeSanctis ARCHITECTURE IN COMMUNION: IMPLEMENTING THE SECOND VATICAN COUNCIL THROUGH LITURGY AND ARCHITECTURE By Steven J. Schloeder [source]

THE EFFECT OF SALTS ON THERMAL AND HYDRIC DILATATION OF POROUS BUILDING STONE*

ARCHAEOMETRY, Issue 3 2009
M. AL-NADDAF
Fifteen desalinated sandstone drill core samples from Umm Ishrin Sandstone Formation in Petra (Cambrian age) were used for this study. The samples were mineralogically analysed using X-ray diffraction and their physical properties were also determined. Samples with similar physical properties and mineralogical composition were taken for further experimental work. After desalination, thermal and hydric dilatation coefficients were measured, then three types of salts (NaCl, KCl and Na2SO4·10H2O), which have high solubility and consequently are the most dangerous to building stone (and are also detected in the sandstone monuments in Petra), were introduced into the samples and their contents were calculated. The results show that salt crystallization in the pores of building stones can increase their thermal dilatation and decrease their hydric dilatation to varying extents, depending on the nature of the salt. The average increase in the thermal dilatation coefficient per unit mass of salt is the lowest for the Na2SO4·10H2O-salted samples with a value of 5.3%, while the NaCl-salted samples have the highest value with 7.8% per salt mass. The average percentage of the decrease of the hydric dilatation coefficient is 1061% for Na2SO4·10H2O-salted samples per mass of salt content; the NaCl-salted samples have a value of 1510% per mass of salt content, and the KCl-salted samples almost the same value. For the salt-free samples, it was found that in climatic conditions with a high temperature range, the deterioration of sandstone due to temperature fluctuation is more effective than that caused by change in the moisture content, while samples with high salt content suffer more from hydric dilatation. [source]

MAKING AN IMPRESSION: REPLICATION AND THE ONTOLOGY OF THE GRAECO-ROMAN SEAL STONE

ART HISTORY, Issue 2 2006
VERITY PLATT
The debate on replication in ancient art has traditionally concentrated upon Roman ,copies' of famous Greek sculptures and paintings. This article explores a different, but no less significant, kind of replication , the use of intaglio gems as seals to create wax impressions. The mechanical transmission of a glyptic image from one medium to another played an important role in Graeco-Roman society, conferring authority upon the seal as an individual or state signature employed in legal, political and personal exchange. The direct relationship between seal and impression was also appropriated by Greek philosophers as a metaphor for unmediated sense perception , the ,impressions' made by material objects upon the soul. However, as a comparison with the ontological issues surrounding the modern photograph shows, the seemingly unproblematic relationship between image and impression is more complex than may initially seem: the seal's philosophical appeal lay ultimately more in its social significance , as a guarantor of authenticity and marker of the self , than in its true ontological status. [source]

ALTERNATIVE METHODS IN THE ENDOSCOPIC MANAGEMENT OF DIFFICULT COMMON BILE DUCT STONES

DIGESTIVE ENDOSCOPY, Issue 2010
Dong Ki Lee
The endoscopic method is accepted as a first treatment modality in the management of extrahepatic bile duct. Most large stones can be removed with basket and mechanical lithotripsy after endoscopic sphincterotomy. Currently, in treating large extrahepatic bile duct stones, endoscopic papillary large balloon dilation with mid-incision endoscopic sphincterotomy is actively performed instead of applying mechanical lithotripsy after full endoscopic sphincterotomy. Herein, we describe the conceptions, proper indications, methods and complications of endoscopic papillary large balloon dilation with regards to currently published reports. In addition, intracorporeal lithotripsy by peroral cholangioscopy with an ultra-slim upper endoscope is introduced, which is more convenient than previous conventional intracorporeal lithotripsy methods using mother,baby endoscopy or percutaneous transhepatic cholangioscopy. Lastly, biliary stenting with the choleretic agent administration method is briefly reviewed as an alternative treatment option for frail and elderly patients with large impacted common bile duct stones. [source]

RISK FACTORS FOR RECURRENT BILE DUCT STONES AFTER ENDOSCOPIC PAPILLARY BALLOON DILATION: LONG-TERM FOLLOW-UP STUDY

DIGESTIVE ENDOSCOPY, Issue 2 2009
Akira Ohashi
Background:, Little is known about the long-term results of endoscopic papillary balloon dilation (EPBD) for bile duct stones. Methods:, Between 1995 and 2000, 204 patients with bile duct stones successfully underwent EPBD and stone removal. Complete stone clearance was confirmed using balloon cholangiography and intraductal ultrasonography (IDUS). Long-term outcomes of EPBD were investigated retrospectively in the year 2007, and risk factors for stone recurrence were multivariately analyzed. Results:, Long-term information was available in 182 cases (89.2%), with a mean overall follow-up duration of 9.3 years. Late biliary complications occurred in 22 patients (12.1%), stone recurrence in 13 (7.1%), cholangitis in 10 (5.5%), cholecystitis in four, and gallstone pancreatitis in one. In 11 of 13 patients (84.6%), stone recurrence developed within 3 years after EPBD. All recurrent stones were bilirubinate. Multivariate analysis identified three risk factors for stone recurrence: dilated bile duct (>15 mm), previous cholecystectomy, and no confirmation of clean duct using IDUS. Conclusion:, Approximately 7% of patients develop stone recurrence after EPBD; however, retreatment with endoscopic retrograde cholangiopancreatography is effective. Careful follow up is necessary in patients with dilated bile duct or previous cholecystectomy. IDUS is useful for reducing stone recurrence after EPBD. [source]

COMPARING BALLOON DIAMETER ON PERFORMING ENDOSCOPIC PAPILLARY BALLOON DILATATION WITH ISOSORBIDE DINITRATE DRIP INFUSION FOR REMOVAL OF BILE DUCT STONES

DIGESTIVE ENDOSCOPY, Issue 4 2004
Hiroshi Nakagawa
Background:, Endoscopic papillary balloon dilatation (EPBD) is one of the methods to remove bile duct stones. EPBD might preserve the function of the sphincter of Oddi despite the potential risk of acute pancreatitis. There are only a few reports of EPBD reducing the risk of acute pancreatitis and, at same time, preserving the function of the sphincter of Oddi. Methods:, We performed EPBD for bile duct stone removal in 60 patients using two balloons with different diameters. Patients were randomized to EPBD with a 6 mm balloon (n = 30) or an 8 mm balloon (n = 30). In both groups, isosorbide dinitrate (ISDN) was infused in a rate of 5 mg/h while low pressure EPBD were being performed. The pressure of the sphincter of Oddi was observed before and after the EPBD procedures. Also, serum amylase level after EPBD was observed for both groups. Results:, Serum amylase level of the 6 mm group was signi,cantly higher than that of the 8 mm group (P < 0.05). Acute pancreatitis occurred in two patients ( 6.7%) in the 6 mm group whereas no case was observed for the 8 mm group. The rates of duct clearance were 93% in the 6 mm group and 100% in the 8 mm group. Stone removals were dif,cult in seven cases with 6 mm balloon dilatations due to the narrow ori,ces of the papilla. In the 6 mm group, there was no signi,cant difference between the basal sphincter of Oddi pressure (BSOP) and the phasic sphincter of Oddi pressure (PSOP) before and after EPBD. However in the 8 mm group, the BSOP observed after the EPBD procedure was signi,cantly higher than BSOP before the treatments. Within this group, BSOP values after EPBD were preserved by approximately 80% of the BSOP values before the treatments. In contrast, there was no signi,cant difference in PSOP before and after the treatments. Regarding the stone numbers, no signi,cant difference was observed in BSOP before and after the treatments for the 6 mm group with less than two stones. Also, as for stone size, no signi,cant difference was observed in BSOP before and after the treatments for the 6 mm group with stones of less than 6 mm in diameter. Conclusion:, We are now conducting EPBD with ISDN infusion using a 6 mm balloon for a patient who has less than two stones with size not exceeding 6 mm in diameter. An 8 mm balloon is used for a patient with more than two stones or a stone greater than 6 mm in size. [source]

PROBLEMS INHERENT TO BALLOON DILATION FOR THE TREATMENT OF COMMON BILE DUCT STONES IN COMPARISON WITH ENDOSCOPIC SPHINCTEROTOMY

DIGESTIVE ENDOSCOPY, Issue 2 2000
Masao Tanaka
First page of article [source]

CONFIGURING HISTORICAL FACTS THROUGH HISTORICAL FICTION: AGENCY, ART-IN-FACT, AND IMAGINATION AS STEPPING STONES BETWEEN THEN AND NOW

EDUCATIONAL THEORY, Issue 2 2007
Kent Den Heyer
Through reading a work of historical fiction, Ursula Hegi's novel Stones from the River, Kent den Heyer and Alexandra Fidyk offer a theoretical consideration of the following questions and their classroom implications: What is the role of historical fiction in enabling the imaginative grappling with historical fact? Or, in what ways does historical fiction enable us to come to terms with the ethical imperatives of learning from the past? What role does agency play in historical imagination? These are questions of ethics. They are, therefore, also questions of education. [source]

EXPLORING IDENTITY AND PLACE: AN ANALYSIS OF THE PROVENANCE OF PASSAGE GRAVE STONES ON GUERNSEY AND JERSEY IN THE MIDDLE NEOLITHIC

OXFORD JOURNAL OF ARCHAEOLOGY, Issue 1 2003
DAVID BUKACH
Summary. This study examines the provenance of rock types used in the construction of Middle Neolithic passage grave stones on the islands of Guernsey and Jersey, focusing on the social dimensions of stone selection. The use of stones in passage grave construction includes both local and non-local rock types, which at some sites are organized in distinctive patterns. It is argued that the choice of stones was bound by concepts of identity, and that the communities which gathered to build these monuments may have used specific rock types to represent their community and their local mythologies. The relationship between identity and stone selection is supported both by analogy and by research into the role of landmarks in the development of local landscapes and ideology. The success of megalith provenance studies on Guernsey and Jersey suggests considerable potential for future research in other geologically diverse regions. [source]

A SECOND CYCLE OF TAMSULOSIN IN PATIENTS WITH DISTAL URETERIC STONES: A PROSPECTIVE RANDOMIZED TRIAL

BJU INTERNATIONAL, Issue 12 2009
Gianluca Giannarini
No abstract is available for this article. [source]

Think Globally, Publish Virtually, Act Locally: A U.S.-Saudi International Museum Partnership

CURATOR THE MUSEUM JOURNAL, Issue 1 2005
Paul Michael Taylor
ABSTRACT This paper examines an on-going cooperative project between the National Museum of the Kingdom of Saudi Arabia and the National Museum of Natural History, Smithsonian Institution, undertaken within the framework of the International Partnership Among Museums (IPAM) program of the American Association of Museums. The project,Written in Stone: Epigraphy from the National Museum of Saudi Arabia,is a virtual Web exhibition of inscriptions dating from the late second millennium B.C. to the nineteenth century AD. It is undoubtedly representative of many special-purpose cooperative projects (for exhibitions, research, or other purposes) that are taking place across international boundaries between pairs or groups of museums in various countries. Such collaborations provide examples of how partner institutions can take advantage of the opportunities that globalization and standardization of museum practices offer. [source]

Wind erosion characteristics of Sahelian surface types

EARTH SURFACE PROCESSES AND LANDFORMS, Issue 12 2010
Thomas Maurer
Abstract The assessment of wind erosion magnitudes for a given area requires knowledge of wind erosion susceptibilities of the dominant local surface types. Relative wind erosion potentials of surfaces can hardly be compared under field conditions, as each erosion event is unique in terms of duration, intensity and extent. The objective of this study was to determine and compare relative wind erosion potentials of the most representative surface types over a transect comprising most parts of southwestern Niger. For this purpose, mobile wind tunnel experiments were run on 26 dominant surface types. The effects of surface disturbance were additionally determined for 13 of these surfaces. The results, namely measurements of wind fields and mass fluxes, can be classified according to specific surface characteristics. Three basic surface groups with similar emission behaviour and aerodynamic characteristics were identified: (1) sand surfaces, (2) rough stone surfaces and (3) flat crusted surfaces. Sand surfaces feature a turbulent zone close to the surface due to the development of a saltation layer. Their surface roughness is medium to high, as a consequence of the loss of kinetic energy of the wind field to saltating particles. Sand surfaces show the highest mass fluxes due to the abundance of loose particles, but also fairly high PM10 fluxes, as potential dust particles are not contained in stable crusts or aggregates. Rough stone surfaces, due to their fragmented and irregular surface, feature the highest surface roughness and the most intense turbulence. They are among the weakest emitters but, due to their relatively high share of potential dust particles, PM10 emissions are still average. Flat crusted surfaces, in contrast, show low turbulence and the lowest surface roughness. This group of surfaces shows rather heterogeneous mass fluxes, which range from moderate to almost zero, although the share of PM10 particles is always relatively high. Topsoil disturbance always results in higher total and PM10 emissions on sand surfaces and also on flat crusted surfaces. Stone surfaces regularly exhibit a decrease in emission after disturbance, which can possibly be attributed to a reorganization which protects finer particles from entrainment. The results are comparable with field studies of natural erosion events and similar wind tunnel field campaigns. The broad range of tested surfaces and the standardized methodology are a precondition for the future regionalization of the experimental point data. Copyright © 2010 John Wiley & Sons, Ltd. [source]

Conceptual models for burrow-related, selective dolomitization with textural and isotopic evidence from the Tyndall Stone, Canada

GEOBIOLOGY, Issue 1 2004
Murray K. Gingras
ABSTRACT The formation of dolomite is generally explained using models that reflect larger-scale processes that describe the relationship between the supply and transport of Mg, and geochemical conditions that are amenable to the formation of dolomite. However, heterogeneities in the substrate, such as those made by bioturbating infauna, may play a more important role in dolomitization than has been previously considered. Burrow-facilitated dolomitization is evident in the Ordovician Tyndall Stone (Red River Group, Selkirk Formation) of central Canada. The diagenetic fabrics present are attributed to dolomitizing fluids that both flowed through and evolved within burrow networks. Petrographic analysis suggests that two phases of dolomite formation took place. The first formed a fine-grained, fabric-destructive type that probably accompanied early burial; the second is a fine- to medium-grained, locally sucrosic dolomite that is interpreted to have precipitated during later burial. Isotopic analysis supports the proposed paragenetic history: (1) an apparent linking of the stable isotopes 13C and 18O strongly suggests that the micrite matrix formed during very early diagenesis and was derived from seawater; (2) the initial phase of dolomitization is potentially microbially mediated, as evidenced by the enrichment of 13C; and (3) isotopic values for the second generation of dolomite reflect the mixing of ground water and resorbed early dolomite. This paper conceptualizes the physical and chemical conditions required for the formation of dolomite in association with burrow fabrics. The proposed model reveals a composite of biological and inorganic reactions that demonstrates the interdependence of sediment fabric, organic content and microbial interactions in the development of burrow-mottled dolomitic limestone. It is suggested that where burrow-associated dolomite occurs, it is most likely to develop in two stages: first, the byproducts of the degradation of organic material in burrows locally increase the permeability and porosity around burrow fabrics in shallow diagenetic depositional environments; and, second, the passing of burrowed media into deeper dysaerobic sediment is accompanied by the establishment of fermenting micro-organisms whose byproducts mediate dolomitization. [source]

Hornton Stone: battlefields, buildings and Jurassic seas

GEOLOGY TODAY, Issue 4 2009
Jonathan D. Radley
The Hornton Stone is an unusually pure ooidal ironstone of the Lower Jurassic Marlstone Rock Formation, cropping out on the Edge Hill escarpment and adjacent ironstone plateau in central England. The stone has been quarried for building and ornamental purposes since Medieval times, and more recently as a source of iron ore. Local quarries and buildings provide excellent opportunities to appreciate its fossil content, sedimentary structures and origin. [source]

Historians in ,the liberal hour': Lawrence Stone and J. H. Plumb re,visited

HISTORICAL RESEARCH, Issue 189 2002
David Cannadine
This articles assesses the careers and impact of Lawrence Stone and J. H. Plumb, examining their formative influences, and the effect which they in turn had on the writing and practice of history, particularly in the nineteen,sixties. It assesses their two most resonant books: Stone's The Causes of the English Revolution, 1529,1642(1972) and Plumb's The Growth of Political Stability in England, 1675,1725(1967). The article traces historiographical debate through the twentieth century and into the new millennium, focusing on the buoyant and heady atmosphere of the sixties, which so affected Stone, Plumb and their contemporaries, and the revisionist response which peaked in the nineteen,eighties, and concludes that no historian could or should claim to be unaffected by the times in which he or she writes. [source]

From the Philosopher's Stone to Nanotechnology: Celebrating 800 Years of University of Cambridge (1209,2009)

ADVANCED MATERIALS, Issue 38-39 2009
Andrew Holmes
No abstract is available for this article. [source]

Fire disturbance disrupts co-occurrence patterns of terrestrial vertebrates in Mediterranean woodlands

JOURNAL OF BIOGEOGRAPHY, Issue 5 2006
Maurizio Sarà
Abstract Aim, This paper uses null model analysis to explore the pattern of species co-occurrence of terrestrial vertebrate fauna in fire-prone, mixed evergreen oak woodlands. Location, The Erico,Quercion ilicis of the Mediterranean belt (50,800 m a.s.l.) in the Madonie mountain range, a regional park in northern Sicily (37°50, N, 14°05, E), Italy. Methods, The stratified sampling of vertebrates in a secondary succession of recent burned areas (BA, 1,2 years old), intermediate burned areas (INT, 4,10 years old) and ancient burned areas (CNB, > 50 years old), plus forest fragments left within burned areas (FF, 1,2 years old) permitted the comparison of patterns of species co-occurrence using a set of separate presence/absence matrices. First, the breeding avifauna derived from standardized point counts was analysed using Stone & Roberts'C -score, and by a null model algorithm (fixed/equiprobable). Secondly, the analysis was repeated using all vertebrate species recorded in the succession. Results, Sixty-five species were recorded in the 2-year study period in the four sample treatments. Birds were found to make up the largest component (63%) of the recorded assemblage. The BA treatment had the lowest species richness, followed in order by the small, medium and large FFs, and then by the CNBs. For both analyses (birds and total vertebrates), the C -scores were quite small and not significantly different from those that could be expected by chance in the BA and INT burned areas; this indicates a random co-occurrence among vertebrates of those assemblages. Contrariwise, for both analyses in the CNBs, the C -scores were large and significantly different from the simulated indices, thereby indicating a non-random co-occurrence pattern (segregation) of vertebrates in the undisturbed woodlands. In addition, C -score values for the surviving FFs show a significant aggregation of species. Main conclusions, The null model analyses highlighted a new aspect of fire disturbance in Mediterranean woodland ecosystems: the disruption in patterns of co-occurrence in the terrestrial vertebrate community. Wildfire alters community organization, inducing, for at least 10 years, a random aggregate of species. Communities re-assemble themselves, showing the occurrence of species segregation at least 50 years after fire. [source]

Physical properties and compatibility with dental stones of current alginate impression materials

JOURNAL OF ORAL REHABILITATION, Issue 11 2004
H. Murata
summary, This study examined physical properties and compatibility with dental stones of two types of alginate impression materials. Five powder-type alginate impression materials (Alginoplast EM, Aroma Fine, Algiace Z, Coe Alginate, Jeltrate Plus) and a paste-type alginate impression material (Tokuso AP-1) were used. The dynamic viscosity immediately after mixing was measured by means of a controlled-stress rheometer. The gelation times were determined according to Japanese Industrial Standards (JIS) T6505, and recovery from deformation, strain in compression and compressive strength were determined according to the International Organization for Standardization (ISO) specification 1563. Detail reproduction and surface roughness of type III dental stones (New Plastone, New Sunstone) and a type IV dental stone (Die Stone) were evaluated using a ruled test block as specified in the ISO specification 1563 and a profilometer, respectively. The alginate impression materials evaluated in this study were all in compliance with the ISO specification 1563 and JIS T6505. The alginate impression materials had similar mechanical properties after gelation, whilst a wide range of dynamic viscosity immediately after being mixed, gelation times and compatibility with dental stones were found among the materials. The paste-type material had a higher dynamic viscosity and a shorter gelation time than the powder-type materials. The best surface quality was obtained with the paste-type material/type III dental stone cast combinations. The materials should be selected in consideration of initial flow, setting characteristics and compatibility with dental stones. The results suggested that a paste-type material would better meet the requirements of an alginate impression material. [source]

A Right to Housing: Foundation for a New Social Agenda, edited by Rachel G. Bratt, Michael E. Stone, and Chester Hartman

JOURNAL OF REGIONAL SCIENCE, Issue 2 2007
John Goering
First page of article [source]

Attitudes Toward the Poor and Attributions for Poverty

JOURNAL OF SOCIAL ISSUES, Issue 2 2001
Catherine Cozzarelli
Prior psychological research on attitudes toward the poor has focused almost exclusively on the attributions people make to explain why individuals are poor (e.g., Smith & Stone, 1989; Zucker & Weiner, 1993). The goal of the current study was to investigate the relationships among feelings about the poor and poverty, stereotypes of the poor, attributions for poverty, and sociopolitical ideologies (as assessed by the Protestant Ethic, Belief in a Just World, and Right Wing Authoritarianism Scales). In our Midwestern college sample (n = 209), attitudes toward the poor were found to be significantly more negative than attitudes toward the middle class. In addition, participants were most likely to blame poor people them-selves for their poverty. However, attitudes toward the poor and attributions for the causes of poverty were found to vary among individuals from different sociodemographic backgrounds and by degree of endorsement of Protestant ethic, just world, and authoritarianism beliefs. Few gender differences were obtained. [source]

Discussion on the paper by Stone

JOURNAL OF THE ROYAL STATISTICAL SOCIETY: SERIES A (STATISTICS IN SOCIETY), Issue 3 2002
Peter C. Smith
First page of article [source]

The Imperative of Economics in Urban Political Analysis: A Reply to Clarence N. Stone

JOURNAL OF URBAN AFFAIRS, Issue 1 2004
David L. Imbroscio
First page of article [source]

Partnerships versus Regimes: Why Regime Theory Cannot Explain Urban Coalitions in the UK

JOURNAL OF URBAN AFFAIRS, Issue 3 2003
Jonathan S. Davies
Regime theory, as developed by Elkin and Stone, neither describes nor explains the contrasting forms of collaboration in the UK. The development of urban regeneration partnerships has been driven by a combination of two main factors: the development of an ideological perception within local government elites that urban regeneration depends on market led growth, and a series of central government regeneration initiatives. These initiatives, designed to encourage, and where necessary coerce, local authorities into cooperative arrangements have resulted in highly bureaucratized, but symbolic, partnerships with local business elites. Business activity in these partnerships thus far has been marginal. It is unlikely to be fruitful, therefore, for scholars to seek Stonean regimes in the UK. On the other hand, to describe such partnerships as regimes is misleading and results in a lack of conceptual clarity. Despite the fashion for copying urban policy from the US, the institutions of urban politics in the UK are likely to remain resolutely different. [source]

Generalization of the B *-algebra (C0(X),, ,,)

MATHEMATISCHE NACHRICHTEN, Issue 1 2009
Jorma Arhippainen
Abstract We give a generalization of the Stone,Weierstrass property for subalgebras of C (X), with X a completely regular Hausdorff space. In particular, we study in this paper some subalgebras of C0(X), with X a locally compact Hausdorff space, provided with weighted norm topology. By using the Stone,Weierstrass property, we then describe the ideal structure of these algebras. (© 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

What can clinical teachers learn from Harry Potter and the Philosopher's Stone?

MEDICAL EDUCATION, Issue 12 2002
Jennifer J Conn
Many clinical teachers acquire a working knowledge of the principles of teaching and learning through observation, by adopting positive and rejecting negative examples of clinical instruction. Well selected vignettes of teaching behaviours taken from contemporary film and literature may provide rich substrate by which to engage clinical teachers in discourse about instructional technique. This paper draws on J K Rowling's novel and its companion film, Harry Potter and the Philosopher's Stone, and critically analyses the teaching styles of the staff at Hogwarts School of Wizardry and Witchcraft in the context of contemporary generic and medical education literature. Specifically, it argues that effective teachers demonstrate not only an in-depth knowledge of their discipline but possess a keen appreciation of the cognitive changes that occur in their students during the learning process. They are, furthermore, proficient in core instructional skills such as small group facilitation, feedback and questioning. Most importantly, effective teachers model appropriate attitudes in their professional setting and possess highly developed personal qualities such as creativity, flexibility and enthusiasm. [source]

Theoretical resonant Raman spectra of nanotube (7,0) with point defects

PHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 11-12 2009
Valentin N. Popov
Abstract The Raman spectra of the nanotube (7,0) with point defects (monovacancy, divacancy, and Stone,Wales defect) were simulated in order to derive spectroscopic signatures of defective nanotubes. First, we calculated the electronic band structure and the phonon dispersion of the defective nanotubes using supercells within a non-orthogonal tight-binding model. We found that new optical transitions and Raman-active phonons appeared in comparison with the perfect nanotube. Secondly, we calculated the resonance Raman excitation profile for all Raman-active phonons of the defective nanotubes and simulated their Raman spectra at specific laser excitation energies. The predicted high-intensity Raman lines can be used as spectroscopic signatures of the defective nanotubes. [source]

The effects of inhomogeneous isotope distribution on the vibrational properties of isotope enriched double walled carbon nanotubes

PHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 11 2007
V. Zólyomi
Abstract The radial breathing mode in the Raman spectrum of 13C isotope enriched single walled carbon nanotubes is inhomogeneously broadened due to the random distribution of isotopes. We study this effect theoretically using density functional theory within the local density approximation and compare the result with experiments on isotope engineered double walled carbon nanotubes in which the inner tubes were grown from a mixture of 13C enriched fullerenes and natural fullerenes. As explained by the calculations, this synthesis procedure leads to an increased inhomogeneity compared to a case when only enriched fullerenes are used. The good agreement between the measurements and calculations shows the absence of carbon diffusion along the tube axis during inner tube growth, and presents a strong support of the theory that inner tube growth is governed by Stone,Wales transformations following the interconnection of fullerenes. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

New product development projects: The effects of organizational culture

PROJECT MANAGEMENT JOURNAL, Issue 4 2007
Walid Belassi
Abstract Despite the increasing use of project management within organizations, an attendant poor rate of success among these projects has been observed (Clancy & Stone, 2005; Ives, 2005). Seventy-five percent of all business transformation projects fail (Collyer, 2000) and only 16% of U.S. IT projects are completed on time and on budget (Peled, 2000). In an attempt to overcome such a high project failure rate, this paper investigates the effects of organizational culture on the performance of particular types of projects: new product development (NPD) projects. Using data from 95 U.S. organizations, the study provides evidence of the significant effects of organizational culture on NPD projects. [source]