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Distribution by Scientific Domains

Humanities and Social Sciences	29%
Medical Sciences	25%
Psychology	9%
Life Sciences	9%
Chemistry	9%
Business, Economics, Finance and Accounting	9%
Engineering	6%

Selected Abstracts

Is Rationing the Only Way Out?

CONGENITAL HEART DISEASE, Issue 4 2010
Dr James E. Lock MD
No abstract is available for this article. [source]

Mexico's Community-Managed Forests as a Global Model for Sustainable Landscapes

CONSERVATION BIOLOGY, Issue 3 2003
David Barton Bray
On the other hand, conservationists have declared that the only way to stem the tide of deforestation is to place as many tracts as possible under strict protection. In this context, Mexico presents a national laboratory for studying the social and ecological benefits of delivering forests to local people. As a little-noticed result of the Mexican Revolution in the second decade of the twentieth century, well over half of the forests of Mexico were placed in community-held lands. In historic struggles that passed through several phases, most of these communities have now gained substantial control over the use of their forests. Because of the substantial degree of social capital in rural forms of organization in Mexico, this control of forest resources has led to an estimated 290,479 community forest enterprises ( CFEs ), through which communities are producing timber on their own lands. New studies are beginning to suggest that important gains in both social and economic justice, good forest management, and biodiversity protection are resulting from the actions of these CFEs. As more forests globally are being devolved to local communities, it is important to carry out more research on the Mexican model of community forest management for timber production. Resumen: Investigadores preocupados por el manejo sostenible de bosques en los trópicos han argumentado que el camino para una custodia mas efectiva de los recursos forestales es la transferencia de la responsabilidad a las comunidades locales que obtienen sustento de ellos. Por otro lado, conservacionistas han declarado que la única manera de detener la ola de deforestación es colocar bajo protección estricta tantas regiones como sea posible. En este contexto, México representa un laboratorio para el estudio de los beneficios sociales y ecológicos de entregar los bosques a los habitantes locales. Como un resultado poco conocido de la Revolución Mexicana, en la segunda década del siglo veinte, más de la mitad de los bosques de México se ubicaban en tierras que estaban en manos de las comunidades. Las comunidades forestales han atravesado por distintas etapas de conflicto, tras la cuáles han obtendio un control sustancial de los usos de sus bosques. Debido al nivel considerable de capital social en formas de organización rural en México, este control de los recursos forestales ha conducido a la integración de entre 290,479 empresas forestales comunitarias ( EFC ), en las que las comunidades están produciendo madera en sus propias tierras. Nuevos estudios están comenzando a sugerir que se están produciendo ganancias importantes en las acciones de estas EFC están generando beneficios importantes, tanto en lo que se refiere a justicia social como económica, la administración correcta de bosques y la protección de la biodiversidad. A medida en que se deleguen mayores extensiones de bosques a comunidades locales, es importante llevar a cabo más investigación sobre el modelo mexicano de manejo comunitario de bosques para la producción de forestal maderable. [source]

Categorization is not the only way: a comment on Rodrigo and Ato

EUROPEAN JOURNAL OF SOCIAL PSYCHOLOGY, Issue 1 2002
Henk A. L. Kiers
First page of article [source]

The Future of Regions: Why the Competitiveness Imperative Should not Prevail over Solidarity, Sustainability and Democracy

GEOGRAFISKA ANNALER SERIES B: HUMAN GEOGRAPHY, Issue 2 2000
Riccardo Petrella
The thesis here submitted for debate and criticism is as follows: if today's governing principles that inspire policy choices and priority setting in our societies (which claim to be "knowledge- based societies") are to remain in place in the course of the coming five to ten years, the relative position of the less developed regions (and cities) vis-à-vis the most developed ones will again deteriorate, even though per capita real purchasing power might also slightly increase in the less developed regions. The if-hypothesis, however, is not the only possible pattern of future developments. Because present economic and political leaders are, in general, the promoters and supporters of today's predominant principles, the only way to make possible alternative future developments based on solidarity, sustainability and democracy is that citizens themselves take the initiative, locally and globally, to modify present practices and define new goals and new priorities. In consideration of the results obtained in recent years by civil social movements and protests, one may reasonably consider it as a possible scenario. [source]

Teaching and Learning Guide for: Memoryscape: How Audio Walks Can Deepen Our Sense of Place by Integrating Art, Oral History and Cultural Geography

GEOGRAPHY COMPASS (ELECTRONIC), Issue 5 2008
Toby Butler
Author's Introduction This article is concerned with the history and practice of creating sound walks or ,memoryscapes': outdoor trails that use recorded sound and spoken memory played on a personal stereo or mobile media to experience places in new ways. It is now possible to cheaply and easily create this and other kinds of located media experience. The development of multi-sensory-located media (,locedia') presents some exciting opportunities for those concerned with place, local history, cultural geography and oral history. This article uses work from several different disciplines (music, sound art, oral history and cultural geography) as a starting point to exploring some early and recent examples of locedia practice. It also suggests how it might give us a more sophisticated, real, embodied and nuanced experience of places that the written word just can not deliver. Yet, there are considerable challenges in producing and experiencing such work. Academics used to writing must learn to work in sound and view or image; they must navigate difficult issues of privacy, consider the power relations of the outsider's ,gaze' and make decisions about the representation of places in work that local people may try and have strong feelings about. Creating such work is an active, multi-sensory and profoundly challenging experience that can offer students the chance to master multi-media skills as well as apply theoretical understandings of the histories and geographies of place. Author Recommends 1.,Perks, R., and Thomson, A. (2006). The oral history reader, 2nd ed. London: Routledge. This is a wonderful collection of significant writing concerned with oral history. Part IV, Making Histories features much of interest, including a thought-provoking paper on the challenges of authoring in sound rather than print by Charles Hardy III, and a moving interview with Graeme Miller, the artist who created the Linked walk mentioned in the memoryscape article. These only feature in the second edition. 2.,Cresswell, T. (2004). Place: a short introduction. Oxford, UK: Blackwell. A refreshingly clear and well-written guide to the different theoretical takes on what makes places , a good starting point for further reading. 3.,Carlyle, A. (ed.). (2008). Autumn leaves: sound and the environment in artistic practice. Paris, France: Double Entendre. This is a collection of short essays and examples of located sonic media art; it includes interviews with practitioners and includes Hildegard Westekamp's Soundwalking, a practical guide to leading students on a mute walk. Lots of thought provoking, applied reading material for students here. 4.,Blunt, A., et al. (eds) (2003). Cultural geography in practice. London: Arnold. A great book for undergraduate and postgraduate students , concepts explained and lots of examples of actually doing cultural geography. The chapter on mapping worlds by David Pinder is particularly useful in this context. 5.,Pinder, D. (2001). Ghostly footsteps: voices, memories and walks in the city. Ecumene 8 (1), pp. 1,19. This article is a thoughtful analysis of a Janet Cardiff sound walk in Whitechapel, East London. Online Materials http://www.memoryscape.org.uk This is my project website, which features two online trails, Dockers which explores Greenwich and the memories of the London Docks that are archived in the Museum of London, and Drifting which is a rather strange experiment-combining physical geography and oral history along the Thames at Hampton Court, but still makes for an interesting trail. Audio, maps and trails can be downloaded for free, so students with phones or iPods can try the trails if you are within reach of Surrey or London. The site features an online version, with sound-accompanying photographs of the location. http://www.portsofcall.org.uk This website has three more trails here, this time of the communities surrounding the Royal Docks in East London. The scenery here is very dramatic and anyone interested in the regeneration of East London and its impact on local communities will find these trails interesting. Like Dockers, the walks feature a lot of rare archive interviews. This project involved a great deal of community interaction and participation as I experimented with trying to get people involved with the trail-making process. The site uses Google maps for online delivery. http://www.soundwalk.com This New York-based firm creates exceptionally high-quality soundwalks, and they are well worth the money. They started by producing trails for different districts of New York (I recommend the Bronx Graffiti trail) and have recently made trails for other cities, like Paris and Varanassi in India. http://www.mscapers.com This website is run by Hewlett Packard, which has a long history of research and development in located media applications. They currently give free licence to use their mscape software which is a relatively easy to learn way of creating global positioning system-triggered content. The big problem is that you have to have a pricey phone or personal digital assistant to run the software, which makes group work prohibitively expensive. But equipment prices are coming down and with the new generations of mobile phones developers believe that the time when the player technology is ubiquitous might be near. And if you ask nicely HP will lend out sets of equipment for teaching or events , fantastic if you are working within reach of Bristol. See also http://www.createascape.org.uk/ which has advice and examples of how mscape software has been used for teaching children. Sample Syllabus public geography: making memoryscapes This course unit could be adapted to different disciplines, or offered as a multidisciplinary unit to students from different disciplines. It gives students a grounding in several multi-media techniques and may require support/tuition from technical staff. 1.,Introduction What is a located mediascape, now and in the future? Use examples from resources above. 2.,Cultural geographies of site-specific art and sound Theories of place; experiments in mapping and site-specific performance. 3.,Walk activity: Westergard Hildekamp , sound walk, or one of the trails mentioned above The best way , and perhaps the only way , to really appreciate located media is to try one in the location they have been designed to be experienced. I would strongly advise any teaching in this field to include outdoor, on-site experiences. Even if you are out of reach of a mediascape experience, taking students on a sound walk can happen anywhere. See Autumn Leaves reference above. 4.,Researching local history An introduction to discovering historical information about places could be held at a local archive and a talk given by the archivist. 5.,Creating located multimedia using Google maps/Google earth A practical exercise-based session going through the basics of navigating Google maps, creating points and routes, and how to link pictures and sound files. 6.,Recording sound and oral history interviews A practical introduction to the techniques of qualitative interviewing and sound recording. There are lots of useful online guides to oral history recording, for example, an online oral history primer http://www.nebraskahistory.org/lib-arch/research/audiovis/oral_history/index.htm; a more in depth guide to various aspects of oral history http://www.baylor.edu/oral%5fhistory/index.php?id=23566 or this simple oral history toolkit, with useful links to project in the North of England http://www.oralhistorynortheast.info/toolkit/chapter1.htm 7.,Sound editing skills Practical editing techniques including working with clips, editing sound and creating multi-track recordings. The freeware software Audacity is simple to use and there are a lot of online tutorials that cover the basics, for example, http://www.wikieducator.org/user:brentsimpson/collections/audacity_workshop 8.,Web page design and Google maps How to create a basic web page (placing pictures, text, hyperlinks, buttons) using design software (e.g. Dreamweaver). How to embed a Google map and add information points and routes. There is a great deal of online tutorials for web design, specific to the software you wish to use and Google maps can be used and embedded on websites free for non-profit use. http://maps.google.com/ 9,and 10. Individual or group project work (staff available for technical support) 11.,Presentations/reflection on practice Focus Questions 1What can sound tell us about the geographies of places? 2When you walk through a landscape, what traces of the past can be sensed? Now think about which elements of the past have been obliterated? Whose past has been silenced? Why? How could it be put back? 3Think of a personal or family story that is significant to you. In your imagination, locate the memory at a specific place. Tell a fellow student that story, and describe that place. Does it matter where it happened? How has thinking about that place made you feel? 4What happens when you present a memory of the past or a located vision of the future in a present landscape? How is this different to, say, writing about it in a book? 5Consider the area of this campus, or the streets immediately surrounding this building. Imagine this place in one of the following periods (each group picks one): ,,10,000 years ago ,,500 years ago ,,100 years ago ,,40 years ago ,,last Thursday ,,50 years time What sounds, voices, stories or images could help convey your interpretation of this place at that time? What would the visitor hear or see today at different points on a trail? Sketch out an outline map of a located media trail, and annotate with what you hear/see/sense at different places. Project Idea small group project: creating a located mediascape Each small group must create a located media experience, reflecting an aspect of the history/geography/culture of an area of their choosing, using the knowledge that they have acquired over the course of the semester. The experience may be as creative and imaginative as you wish, and may explore the past, present or future , or elements of each. Each group must: ,,identify an area of interest ,,research an aspect of the area of the groups choosing; this may involve visiting local archives, libraries, discussing the idea with local people, physically exploring the area ,,take photographs, video or decide on imagery (if necessary) ,,record sound, conduct interviews or script and record narration ,,design a route or matrix of media points The final project must be presented on a website, may embed Google maps, and a presentation created to allow the class to experience the mediascape (either in the classroom or on location, if convenient). The website should include a brief theoretical and methodological explanation of the basis of their interpretation. If the group cannot be supported with tuition and support in basic website design or using Google mapping with sound and imagery, a paper map with locations and a CD containing sound files/images might be submitted instead. For examples of web projects created by masters degree students of cultural geography at Royal Holloway (not all sound based) see http://www.gg.rhul.ac.uk/MA/web-projects.html [source]

Kurt Tucholsky as Prophet of European Unity

GERMAN LIFE AND LETTERS, Issue 2 2001
Ian King
Whilst Kurt Tucholsky has long been recognised as the leading left-wing intellectual, polemicist and satirist of the Weimar Republic, his enthusiasm for the cause of a united Europe has only recently come to light. In the late 1920s he wrote frequently of the need to abandon absolute state sovereignty in favour of a Federal United States of Europe, and even anticipated Mikhail Gorbachev's concept of a common European house. His reasoning was to be followed by subsequent German leaders from Adenauer to Kohl: after the disastrous Treaty of Versailles and with the League of Nations proving a broken reed, a united Europe would be the only way to prevent another still more bloody war. However, Tucholsky had no clear idea of how Europe could be brought together, remained somewhat sceptical about the Pan-Europe model of Count Coudenhove-Kalergi, and did not even comment on the European Federal Union proposed in 1930 by the French Foreign Minister, Briand. Three years later, all the plans for European unity were frustrated by the triumph of Nazism and Tucholsky lapsed into despairing silence and suicide. [source]

Rethinking Caribbean transnational connections: conceptual itineraries

GLOBAL NETWORKS, Issue 1 2006
D. ALISSA TROTZ
At the same time, the intense focus on linkages between origin and destination groups frequently ends up privileging this binary - home/away - as the only way to map enduring cross-border linkages. Drawing on two examples of Caribbean practices connecting Toronto and New York, in this article I suggest the traversing of a different spatial terrain and consider the implications of expanding our conceptual itineraries to include these other journeys that so far have tended to fly under the radar in discussions of transnational migration. [source]

The New Social Contract and the Struggle for Sovereignty in the Netherlands

GOVERNMENT AND OPPOSITION, Issue 4 2007
Marinus R. R. Ossewaarde
One of the recurring topics in the history of sovereign nation-states is the way in which national identity, and social and cultural differences are dealt with politically. In the Netherlands, that has always had a strong tradition of social citizenship, the government has recently responded to plural nationhood and its problems by turning to new concepts of citizenship. In this article, it is argued that notions of citizenship are, in the end, used to reinforce Dutch sovereignty by creating and maintaining national cohesion. The underlying assumption in public policy is that a strong sense of national citizenship that replaces the old model of social citizenship is the only way to reconcile differences and safeguard peace in contemporary post-industrial society. Three Dutch policy sectors , integration, welfare and child protection , are examined to see how these concepts have taken shape in public policy. [source]

Interorgan ammonia and amino acid metabolism in metabolically stable patients with cirrhosis and a TIPSS

HEPATOLOGY, Issue 5 2002
Steven W. M. Olde Damink
Ammonia is central to the pathogenesis of hepatic encephalopathy. This study was designed to determine the quantitative dynamics of ammonia metabolism in patients with cirrhosis and previous treatment with a transjugular intrahepatic portosystemic stent shunt (TIPSS). We studied 24 patients with cirrhosis who underwent TIPSS portography. Blood was sampled and blood flows were measured across portal drained viscera, leg, kidney, and liver, and arteriovenous differences across the spleen and the inferior and superior mesenteric veins. The highest amount of ammonia was produced by the portal drained viscera. The kidneys also produced ammonia in amounts that equaled total hepatosplanchnic area production. Skeletal muscle removed more ammonia than the cirrhotic liver. The amount of nitrogen that was taken up by muscle in the form of ammonia was less than the glutamine that was released. The portal drained viscera consumed glutamine and produced ammonia, alanine, and citrulline. Urea was released in the splenic and superior mesenteric vein, contributing to whole-body ureagenesis in these cirrhotic patients. In conclusion, hyperammonemia in metabolically stable, overnight-fasted patients with cirrhosis of the liver and a TIPSS results from portosystemic shunting and renal ammonia production. Skeletal muscle removes more ammonia from the circulation than the cirrhotic liver. Muscle releases excessive amounts of the nontoxic nitrogen carrier glutamine, which can lead to ammonia production in the portal drained viscera (PDV) and kidneys. Urinary ammonia excretion and urea synthesis appear to be the only way to remove ammonia from the body. [source]

Implementation of a stabilized finite element formulation for the incompressible Navier,Stokes equations based on a pressure gradient projection

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS, Issue 4 2001
Ramon Codina
Abstract We discuss in this paper some implementation aspects of a finite element formulation for the incompressible Navier,Stokes equations which allows the use of equal order velocity,pressure interpolations. The method consists in introducing the projection of the pressure gradient and adding the difference between the pressure Laplacian and the divergence of this new field to the incompressibility equation, both multiplied by suitable algorithmic parameters. The main purpose of this paper is to discuss how to deal with the new variable in the implementation of the algorithm. Obviously, it could be treated as one extra unknown, either explicitly or as a condensed variable. However, we take for granted that the only way for the algorithm to be efficient is to uncouple it from the velocity,pressure calculation in one way or another. Here we discuss some iterative schemes to perform this uncoupling of the pressure gradient projection (PGP) from the calculation of the velocity and the pressure, both for the stationary and the transient Navier,Stokes equations. In the first case, the strategies analyzed refer to the interaction of the linearization loop and the iterative segregation of the PGP, whereas in the second the main dilemma concerns the explicit or implicit treatment of the PGP. Copyright © 2001 John Wiley & Sons, Ltd. [source]

Using imagery in cognitive-behavioral treatment for eating disorders: Tackling the restrictive mode

INTERNATIONAL JOURNAL OF EATING DISORDERS, Issue 7 2006
DClinPsy, Victoria Mountford BA
Abstract A restrictive thinking style in the eating disorders, often referred to as "anorexic thinking," is often resistant to cognitive-behavioral interventions, even when apparent motivation is relatively high. It is argued that this difficulty is due in part to the ingrained nature of such thinking patterns, regardless of diagnosis. Those patterns reflect the ego-syntonic element of the eating disorders, and manifest as difficulty for the patient in identifying and challenging negative automatic thoughts and maladaptive core beliefs. There is a need to develop cognitive techniques that allow the individual to identify maladaptive cognitions as reflecting their restrictive schema mode, rather than being the only way of thinking and seeing the world. This study describes the use of imagery to enable patients to distinguish the restrictive thoughts from other cognitive perspectives. The restrictive "mode" is presented as part of the individual's personality structure (drawing on cognitive-behavioral models of personality), rather than being an external entity. This technique is designed to facilitate conventional cognitive-behavioral therapy, freeing the patient to challenge her cognitions and to engage in behavioral experiments. We present case material to illustrate this technique and its use in conjunction with other cognitive-behavioral techniques. Future directions and potential limitations are also discussed. © 2006 by Wiley Periodicals, Inc. [source]

The Financial Crisis: Causes and Lessons,

JOURNAL OF APPLIED CORPORATE FINANCE, Issue 3 2010
Kenneth E. Scott
The author argues that the root cause of the recent crisis was a housing bubble whose origins can be traced to loose monetary policy and a government housing policy that continually pushed for lower lending standards to increase home ownership. The negative consequences of such policies were amplified when transmitted throughout the financial system by financial institutions through the process of securitization. In attempting to assess culpability for the crisis and identify possible reforms, the author focuses on three categories: 1Defects in Financial Products: Without criticizing derivatives and the process of securitization, the author identifies the sheer complexity of the securities as a major source of the problem,for which the solution is a simpler security design combined with greater disclosure about the underlying assets being securitized. 2Defects in Risk Management: Thanks in large part to agency and other incentive problems, there was universal underestimation of risks by mortgage originators and financial institutions throughout the securitization chain. Changing incentive pay structures is part of the solution, and so are better accounting rules for SPEs. But more effective regulatory oversight and ending "too big to fail" may well be the only way to curb excessive private risk-taking. 3Defects in Government Policy and Regulation: While acknowledging the need for more effective oversight, the author argues that there was ample existing authority for U.S. regulators to have addressed these issues. Lack of power and authority to regulate was not at the heart of the problem,the real problem was lack of foresight and judgment about the unexpected. After expressing doubt that regulators can prevent major financial failures, the author recommends greater attention to devising better methods of resolving such failures when they occur. One of the main goals is to ensure that losses are borne not by taxpayers but by private investors in a way that maintains incentives for market discipline while limiting spillover costs to the entire system. [source]

Ethical Issues in HIV Research in Poor Countries

JOURNAL OF NURSING SCHOLARSHIP, Issue 2 2001
Gladys Mabunda
Purpose: To increase awareness of the potential for conducting unethical research in poor nations in the name of scientific inquiry, and to enumerate ethical questions in HIV/AIDS research. Organizing construct: Principles of ethics and ethical analysis in clinical research. Sources and methods: Review of literature on ethical principles of research in developing nations. Findings: People who participate in clinical trials in poor countries often do so because that may be the only way to gain access to health care. However, access to tested drugs beyond clinical trials is not guaranteed. Participants often do not understand the consequences of being research subjects. Conclusions: Conducting research in poor nations requires recognition of ethical issues and maintenance of ethical standards, regardless of material wealth of the countries. Ethical standards also indicate including people from the target population in decisions relating to designing and conducting clinical trials. [source]

Systemic and topical corticosteroid treatment of oral lichen planus: a comparative study with long-term follow-up

JOURNAL OF ORAL PATHOLOGY & MEDICINE, Issue 6 2003
M. Carbone
Abstract Background:, Topical corticosteroids are the mainstay treatment for oral lichen planus (OLP), but some authors suggest that systemic corticosteroid therapy is the only way to control acute presentation of OLP. Methods:, Forty-nine patients with histologically proven atrophic,erosive OLP were divided into two groups matched for age and sex. The test group (26 patients) was treated systemically with prednisone (50 mg/day), and afterwards with clobetasol ointment in an adhesive medium plus antimicotics, whereas the control group (23 patients) was only treated topically with clobetasol plus antimycotics. Results:, Complete remission of signs was obtained in 68.2% of the test group and 69.6% of the control group, respectively (P = 0.94). Similar results were obtained for symptoms. Follow-up showed no significant differences between the two groups. One-third of the patients of the test group versus none in the control group experienced systemic side-effects (P = 0.003). Conclusions:, The most suitable corticosteroid therapy in the management of OLP is the topical therapy, which is easier and more cost-effective than the systemic therapy followed by topical therapy. [source]

,You tell all the stories': Using narrative to explore hierarchy within a Community of Practice1

JOURNAL OF SOCIOLINGUISTICS, Issue 5 2006
Emma Moore
Recent discussion of the Community of Practice (CofP) (Davies 2005) has suggested that there are certain limitations to the approach with regard to how it accounts for internal hierarchy and community membership. Eckert and Wenger (2005: 588) have suggested that the only way to evaluate such criticism (and avoid building an inappropriately rigid conception of power into CofP theory) is to explore how hierarchies operate within CofPs. This paper offers such an exploration. Using data from a long-term ethnographic study of a high school in the north-west of England, this paper will use narrative analysis (drawing upon the work of Labov and Waletsky [1967] 1997 amongst others) to explore the interactional space in which speakers actively negotiate their personal and community behaviour. The analysis focuses upon the role individuals play as narrators of community practice and illustrates that status inequalities between individual CofP members do not necessarily result in inequitable allocation of control within the CofP. [source]

Unexpected but authentic use of an ethnically,marked dialect

JOURNAL OF SOCIOLINGUISTICS, Issue 4 2002
Julie Sweetland
Recent work on language crossing in the U.S. has examined the temporary appropriation of African American Vernacular English by white youth in an effort to participate in the current popularity and prestige of hip,hop culture, or in order to highlight racial boundaries. While such verbal behavior probably encompasses most white use of AAVE, it is not the only way in which whites (or other non,blacks) can use the variety. This paper presents a case study of the language of a 23 year old white female who makes consistent use of many distinctive linguistic features associated with AAVE. I argue that the interaction of ideologies of race, class, localness and language allow her to be considered an ingroup member despite her biographical race. This suggests that there is a tension between academic linguistic theory and actual speaker practice in assigning authenticity to individuals, and I conclude that language ideologies and other forms of qualitative evidence should be taken into account by sociolinguists looking at the link between language and race. [source]

Demythologizing the machine: Patrick geddes, lewis mumford, and classical sociological theory

JOURNAL OF THE HISTORY OF THE BEHAVIORAL SCIENCES, Issue 1 2008
Chris Renwick
This paper reconsiders the work of the Scottish biologist, sociologist, and town planner Patrick Geddes and his most famous intellectual disciple: the American independent scholar Lewis Mumford. It is argued that existing interpretations of their work, ranging from a dismissal of the two men as eccentric polymaths to the speculative emphasis on the importance of psychological theories in Mumford's oeuvre, are fundamentally flawed. Examining their writings and the letters they exchanged during their 17-year correspondence, this paper shows that the only way we can appreciate the scholarly conventions underpinning Geddes's and Mumford's work, as well as the context in which it was produced, is by looking to the principles of classical sociological theory. © 2008 Wiley Periodicals, Inc. [source]

Time for a shift in crop production: embracing complexity through diversity at all levels

JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, Issue 9 2009
Hanne Østergård
A radical shift in our approach to crop production is needed to ensure food security and to address the problems of soil degradation, loss of biodiversity, polluted and restricted water supplies, coupled with a future of fossil fuel limitations and increasingly variable climatic conditions. An interdisciplinary network of European scientists put forward visions for future crop production embracing the complexity of our socio-ecological system by applying the principle of diversity at all levels from soil micro-organisms to plant varieties and cropping systems. This approach, integrated with careful deployment of our finite global resources and implementation of appropriate sustainable technology, appears to be the only way to ensure the scale of system resilience needed to cope with many of our concerns. We discuss some of the most important tools such as (i) building soil fertility by recycling of nutrients and sustainable use of other natural and physical resources, (ii) enhancing biological diversity by breeding of crops resilient to climate change and (iii) reconnecting all stakeholders in crop production. Finally, we emphasise some of the changes in agricultural and environmental regulation and policy needed in order to implement the visions. Copyright © 2009 Society of Chemical Industry [source]

In Situ Measurement of Pinna nobilis Shells for Age and Growth Studies: A New Device

MARINE ECOLOGY, Issue 3 2002
José Rafael García-March
Abstract. Pinna nobilis Linnaeus 1758 is an endemic bivalve mollusc in the Mediterranean Sea, where it inhabits seagrass meadows, especially Posidonia oceanica (L.) Delile. It is the largest bivalve in the Mediterranean, reaching lengths up to 120,cm. In its natural habitat, P. nobilis lives with the anterior part of the valve buried in the seabed, attached to Posidonia rhizomes by byssus threads. This habit makes it impossible to measure its total length directly in situ. As the only way to determine the individual age is the relationship between age and total length, several equations have been proposed to estimate total length by relating it to the unburied parts of the shell. Such measurements are essential to ecological studies that consider age, growth, and population dynamics, and that evaluate the environmental factors that affect this species. Accurately estimating total length depends on the accuracy and precision of the method employed to measure the unburied shell parts. In this paper, we point out the lack of precision of the instruments and methods used until now; we also demonstrate the reason for this imprecision. A new device to measure unburied parts of Pinna nobilis with a precision comparable to that obtained when measuring extracted valves is described. This device is unaffected by substratum type and reduces measurement time. The latter is a very important feature, because these procedures are usually performed whilst SCUBA diving. Finally, a growth equation has been fitted to the measurements obtained with the new device from a population located in Moraira (Alicante, western Mediterranean). [source]

The pathophysiology of tremor

MUSCLE AND NERVE, Issue 6 2001
Günther Deuschl MD
Abstract Tremor is defined as rhythmic oscillatory activity of body parts. Four physiological basic mechanisms for such oscillatory activity have been described: mechanical oscillations; oscillations based on reflexes; oscillations due to central neuronal pacemakers; and oscillations because of disturbed feedforward or feedback loops. New methodological approaches with animal models, positron emission tomography, and mathematical analysis of electromyographic and electroencephalographic signals have provided new insights into the mechanisms underlying specific forms of tremor. Physiological tremor is due to mechanical and central components. Psychogenic tremor is considered to depend on a clonus mechanism and is thus believed to be mediated by reflex mechanisms. Symptomatic palatal tremor is most likely due to rhythmic activity of the inferior olive, and there is much evidence that essential tremor is also generated within the olivocerebellar circuits. Orthostatic tremor is likely to originate in hitherto unidentified brainstem nuclei. Rest tremor of Parkinson's disease is probably generated in the basal ganglia loop, and dystonic tremor may also originate within the basal ganglia. Cerebellar tremor is at least in part caused by a disturbance of the cerebellar feedforward control of voluntary movements, and Holmes' tremor is due to the combination of the mechanisms producing parkinsonian and cerebellar tremor. Neuropathic tremor is believed to be caused by abnormally functioning reflex pathways and a wide variety of causes underlies toxic and drug-induced tremors. The understanding of the pathophysiology of tremor has made significant progress but many hypotheses are not yet based on sufficient data. Modern neurology needs to develop and test such hypotheses, because this is the only way to develop rational medical and surgical therapies. © 2001 John Wiley & Sons, Inc. Muscle Nerve 24: 716,735, 2001 [source]

A validated spectrophotometric method for quantification of prenylated flavanones in pacific propolis from Taiwan

PHYTOCHEMICAL ANALYSIS, Issue 2 2010
Milena Popova
Abstract Introduction , Because of its chemical diversity, the only way to standardise propolis is to specify multiple standards for different propolis types according to the corresponding chemical profile. So far, this has been done only for European propolis. Objective , To develop a rapid low-cost spectrophotometric procedure for quantification of bioactive prenylated flavanones in Taiwanese propolis. Methodology , The proposed method quantifies the total flavanones on the basis of their absorption as coloured phenylhydrazones formed by interaction with 2,4-dinitrophenylhydrazine. The procedure was validated through model mixture of compounds representing the composition of Taiwanese propolis according to previous studies. The major flavanones of the propolis samples (propolins C, D, F and G) were quantified by HPLC. Antiradical activity against DPPH was also measured. The DNP (dinitrophenylhydrazine) spectrophotometric method is applied for the first time for quantification of prenylated flavanones. Results , Spectophotometric procedure applicable to new type propolis (Macaranga type) was developed with recovery between 105 and 110% at the concentration range of 0.573,1.791,mg/mL. Six propolis samples were analysed by spectrophotometry using the procedure developed and validated, and by HPLC as the results demonstrated satisfactory agreement. Neither the spectrophotometric data nor the values measured by HPLC showed significant correlation with the antiradical activity against DPPH. Conclusion , The proposed spectrophotometric procedure is useful for routine analyses of Macaranga -type propolis, because of its simplicity, repeatability and acceptable accuracy. Its application to a number of commercial samples could be used as a basis for standardisation and quality control of Pacific propolis. Copyright © 2009 John Wiley & Sons, Ltd. [source]

Effect of Scale and Confinement on Gap Tests for Liquid Explosives

PROPELLANTS, EXPLOSIVES, PYROTECHNICS, Issue 5 2003
François-Xavier Jetté
Abstract The factors influencing initiation of detonation in gap tests for liquid explosives are investigated experimentally. A calibrated donor charge (nitromethane) and PMMA attenuator disk arrangement are used to transmit shocks of known strength (2,10,GPa) into a test explosive of nitromethane sensitized with 5% diethylenetriamine. The test explosive is contained in capsules of different wall materials (PVC, Teflon, aluminum), and the dimensions of the charges vary from 25,mm to 100,mm in diameter. For the small-scale charges, the presence of the confining wall of the test capsule is seen to have a pronounced effect on the detonation initiation. Certain wall materials (PVC, Teflon) exhibit a multi-valued critical gap thickness, meaning that a weaker shock may result in initiation while a stronger shock does not. The effect of the wall materials could not be correlated with their acoustic or shock impedance, and the only way to eliminate these effects was to make the diameter of the test charge larger than the donor charge. When the size of the donor charge was increased, the critical pressure required for initiation decreased. These results could be correlated to "ideal" shock initiation experiments that use flyer plates as shock sources assuming that lateral rarefactions quench detonation initiation if they reach the central axis of the charge before the onset of detonation is complete. [source]

Maternal Characteristics and Maternal Limit-Setting Styles

PUBLIC HEALTH NURSING, Issue 5 2002
Elizabeth A. LeCuyer-Maus
In a longitudinal study of 126 mothers and toddlers during toddlerhood, maternal limit-setting styles were assessed at 12, 24, and 36 months in relation to selected maternal characteristics. Mothers using teaching-based limit-setting styles at 12 months reported more optimal relationship histories of care and overprotection/control in their own families of origin. The main contributor to a maternal teaching-based limit-setting style in this sample was years of formal education, followed by a more multicausal conceptualization of how children develop. Thus, while years of formal education appear to facilitate the use of a teaching-based limit-setting style, formal education is not the only way to develop these skills. Maternal conceptualization of development may be amenable to intervention through a number of alternative learning activities. Further research is needed to explore the effects of different types of educational and learning opportunities on current maternal behavior, with the goal of optimizing socialization skills related to the development of toddler self-regulation. [source]

WEIGHTED LOTTERIES IN LIFE AND DEATH CASES

RATIO, Issue 1 2007
Iwao Hirose
Faced with a choice between saving one stranger and saving a group of strangers, some people endorse weighted lotteries, which give a strictly greater chance of being saved to the group of strangers than the single stranger. In this paper I attempt to criticize this view. I first consider a particular version of the weighted lotteries, Frances Kamm's procedure of proportional chances, and point out two implausible implications of her proposal. Then, I consider weighted lotteries in general, and claim (1) that the correct thing to distribute is not the chance of being saved but the good of being saved, (2) that assigning some chance to the single stranger is not the only way to give a positive (and equal) respect to the people concerned, and (3) that the weighted lottery appears to be deceptive since it would show the respect to the single stranger in a negligible way. [source]

ACKNOWLEDGING A HIDDEN GOD: A THEOLOGICAL CRITIQUE OF STANLEY CAVELL ON SCEPTICISM

THE HEYTHROP JOURNAL, Issue 3 2007
JUDITH E. TONNING
In his early work, the philosopher Stanley Cavell offers a sustained engagement with the threat of epistemological scepticism, shaped by the intuition that although (as the late Wittgenstein shows) ordinary language use is the practice within which alone meaning is possible (and which can thus not be further analysed or rationalised), it is also a basic human inclination to wish to escape the limitations of the ,ordinary'. This, for Cavell, is the root of scepticism. Scepticism, on this view, thus appears not primarily as an epistemological but as an (injurious) moral stance, which cannot be refuted but must be continually confronted and overcome. Vis-à-vis scepticism, ,acknowledgement' is the practice-based recognition of the world and other people in their continuing elusiveness, which ineluctably involves risk, but just so is the only way of knowing that is appropriate to and honours the (finite) human condition. One problematic aspect of this (very fertile) approach is that Cavell's secular viewpoint makes it difficult for him to say both why the desire for a ,beyond' arises in the first place, and why its expression as denial is morally wrong (rather than merely misguided). His approach thus invites a theological ,supplementation' which grounds the human condition in an original and real relation to God that is meant to draw the believer, through Christ, into the divine life itself. Such a reinterpretation both elucidates the concepts of scepticism and acknowledgement, and makes these concepts available for a theological outlook that is able to accommodate Cavell's profound insights into ,the human'. [source]

Zinner's syndrome: an up-to-date review of the literature based on a clinical case

ANDROLOGIA, Issue 5 2009
B. J. Pereira
Summary The authors made an up-to-date review of the literature concerning the management of Zinner's syndrome and evaluated a young patient with Zinner's syndrome who had presented with urinary and ejaculatory complaints. Physical examination and transrectal ultra-sonography showed a 7.0 cm right seminal vesicle cyst. Magnetic resonance imaging (MRI) confirmed the diagnosis of Zinner's syndrome. Oligoasthenoteratozoospermia was present at the two seminal analyses. Symptomatic improvement was achieved with conservative measures. Actually, the patient is still on a follow-up programme. The diagnosis is usually established at the age of increased sexual activity. Patients may be asymptomatic or present pain, irritative urinary or ejaculatory symptoms and infertility. MRI has proved to be the best imaging examination. Treatment should be adapted to symptoms, surveillance being the best option in the absence of clinical manifestations. Surgical approach may be adequate when conservative measures prove ineffective. Zinner's syndrome should be suspected if a male young patient presents with unilateral renal agenesis and pelvic complaints and has a supraprostatic mass on digital rectal examination. The initial approach should be medical, but invasive procedures may be the only way to solve the patient's complaints. Nowadays, laparoscopic and robotic techniques must replace the open surgical approach. [source]

Quantifying allowable harm in species at risk: application to the Laurentian black redhorse (Moxostoma duquesnei)

AQUATIC CONSERVATION: MARINE AND FRESHWATER ECOSYSTEMS, Issue 6 2009
Luis A. Vélez-Espino
Abstract 1.When a species is identified for conservation, often the only way to effect recovery is to reduce the harm imposed by stressors threatening the survival of the species. Ideally all threats would be removed; however, this is often not feasible or practical. Within this context, a demographic approach is presented to assess how much human-induced harm could be allowed without impairing the persistence of the species. Harm is defined as a negative perturbation that can target one or more vital rates and life stages simultaneously. 2.Allowable harm, defined as a level of harm that will not jeopardize survival or recovery, will be a function of the vital rates affected by human actions, the sensitivity of population growth to changes in these vital rates (their elasticities), the population growth rate prevailing before harm occurs, and the set of demographic parameters considered safe for long-term persistence. This life-history based approach requires minimal data, can link demography with habitat-explicit information, is flexible enough to encompass complex life histories, and follows a precautionary approach. 3.Quantification of allowable harm could be applied to any species at risk. This approach is introduced by applying it to a Canadian population of a freshwater fish, the black redhorse (Moxostoma duquesnei), demonstrating that in the absence of habitat constraints population dynamics of this species are most sensitive to the survival of young adults, but population fitness is particularly sensitive to the loss of habitat used by young-of-the-year fish under current levels of habitat supply. Copyright © 2009 John Wiley & Sons, Ltd. [source]

The Tree Canopy as Blueprint

ARCHITECTURAL DESIGN, Issue 3 2010
Mitchell Schwarzer
Abstract As the opportunities for new territories become more limited, the only way is up. Mitchell Schwarzer explores the dizzying heights of the ,last biotic frontier' of arboreal architecture with its high platforms, walkways and canopy craft. Challenging in construction and engineering terms, the tree canopy also requires engaging with a different atmospheric and climatic range to those conditions encountered at ground level. Copyright © 2010 John Wiley & Sons, Ltd. [source]

Getting Together to Get Ahead: The Impact of Social Structure on Women's Networking

BRITISH JOURNAL OF MANAGEMENT, Issue 4 2009
Mette D. Hersby
This paper examines the impact of socio-structural variables (i.e. perceptions of permeability, stability and legitimacy of intergroup relations) on the extent to which professional women perceive a women's network as a collective strategy for status enhancement. A survey among network members (n=166) suggests that the extent to which women support and consider a network to benefit women as a collective is dependent on perceptions of whether individual mobility is possible (permeability of group boundaries) and beliefs that organizational conditions will improve for women in the future (stability of conditions for women). Specifically, the network is less likely to be perceived as a collective vehicle for change when individual advancement is possible (because intergroup boundaries are perceived as permeable) and status improvement in the future is unlikely. However, regardless of beliefs about the future, when female participants perceive that many barriers to individual advancement exist (due to the impermeability of intergroup boundaries), the network is considered in more collective terms presumably because the only way to challenge the status quo is through a collective effort. The practical implications for organizations that wish to or have established a women's network are discussed. [source]

Novel tumor marker REG4 detected in serum of patients with resectable pancreatic cancer and feasibility for antibody therapy targeting REG4

CANCER SCIENCE, Issue 11 2006
Akio Takehara
Pancreatic ductal adenocarcinoma (PDAC) shows the worst mortality rate among common malignancies, with a 5-year survival rate of only 4%, and the majority of PDAC patients are diagnosed at an advanced stage in which no effective therapy is available at present. Although the proportion of curable cases is still not so high, surgical resection of early stage PDAC is the only way to cure the disease. Hence, establishment of a screening strategy to detect early stage PDAC by novel serological markers is required urgently, and development of novel molecular therapies for PDAC treatment is also eagerly expected. We here report overexpression of REG4, a new member of the regenerating islet-derived (REG) family, in PDAC cells on the basis of genome-wide cDNA microarray analysis as well as reverse transcription,polymerase chain reaction and immunohistochemical analysis. We also detected significant elevation of REG4 in the serum of some patients with early-stage PDAC using our enzyme-linked immunosorbent assay system, indicating the possibility of REG4 as a new serological marker of PDAC. Furthermore, we found that knockdown of endogenous REG4 expression in PDAC cell lines with small interfering RNA caused a decrease in cell viability. Concordantly, addition of recombinant REG4 to the culture medium enhanced growth of a PDAC cell line in a dose-dependent manner. A monoclonal antibody against REG4 neutralized its growth-promoting effects and attenuated significantly the growth of PDAC cells. These findings indicate that REG4 is a promising tumor marker to screen early-stage PDAC, and also that neutralization of REG4 by the antibody may offer novel potential tools for the treatment of PDAC. (Cancer Sci 2006; 97: 1191,1197) [source]