A New Class of Processes for Formalizing and Generalizing Individual-Based Models: The Semi-Semi-Markov Processes

2000 Mathematics Subject Classification: 60K15, 60K20, 60G20,60J75, 60J80, 60J85, 60-08, 90B15.

Designing Lifestyle-specific Food Policies Based on Nutritional Requirements and Ecological Footprints.

Expanded understanding of the trends and determinants of food consumption is needed to reduce the ecological impacts of the contemporary agro-food system while also being attentive to broader issues pertaining to health and the environment. Incorporating these additional aspects and formulating meaningful dietary recommendations is a major challenge. This article seeks to highlight differences in ecological footprint (EF) by activity level for various so-cial groups to meet suggested physiological requirements by nutritionists versus actual food consumption. The study is based on a combination of healthy diet requirements (as expressed by national guidelines) and a survey of a repre-sentative sample of 1,013 Hungarian adults using a bottom-up approach for calculating EFs. Students and women with small children have a higher than average food-related EF due to their higher nutritional needs. At the same time, the elderly are characterized by lower footprints. Perhaps most interesting is our finding that people with seden-tary forms of employment have higher food footprints than those with jobs that require physical labor. We offer rec-ommendations for food-policy planning based on encouraging dietary changes for individuals, differentiated by the nature of their work. The research suggests that dietary policy that improves health often has environmental benefits.

Negotiating identities, striving for state recognition: Blacks in Córdoba, Argentina 1776–1853

Race in Argentina played a significant role as a highly durable construct by identifying and advancing subjects (1776–1810) and citizens (1811–1853). My dissertation explores the intricacies of power relations by focusing on the ways in which race informed the legal process during the transition from a colonial to national State. It argues that the State’s development in both the colonial and national periods depended upon defining and classifying African descendants. In response, people of African descendent used the State’s assigned definitions and classifications to advance their legal identities. It employs race and culture as operative concepts, and law as a representation of the sometimes, tense relationship between social practices and the State’s concern for social peace. This dissertation examines the dynamic nature of the court. It utilizes the theoretical concepts multicentric legal orders that are analyzed through weak and strong legal pluralisms, and jurisdictional politics, from the late eighteenth to early nineteenth centuries. This dissertation juxtaposes various levels of jurisdiction (canon/state law and colonial/national law) to illuminate how people of color used the legal system to ameliorate their social condition. In each chapter the primary source materials are state generated documents which include criminal, ecclesiastical, civil, and marriage dissent court cases along with notarial and census records. Though it would appear that these documents would provide a superficial understanding of people of color, my analysis provides both a top-down and bottom-up approach that reflects a continuous negotiation for African descendants’ goal for State recognition. These approaches allow for implicit or explicit negotiation of a legal identity that transformed slaves and free African descendants into active agents of their own destinies.

The Role of Leadership Style in Employee Engagement

This paper explores the relationship between leadership styles and engagement in the workplace. The competitive global markets are forcing organizations to look past their products and the bottom line and move beyond just employee motivation and towards having an engaged workforce.

Ethics, Value Systems And The Professionalization Of Hoteliers

In the discussion - Ethics, Value Systems And The Professionalization Of Hoteliers by K. Michael Haywood, Associate Professor, School of Hotel and Food Administration, University of Guelph, Haywood initially presents: “Hoteliers and executives in other service industries should realize that the foundation of success in their businesses is based upon personal and corporate value systems and steady commitment to excellence. The author illustrates how ethical issues and manager morality are linked to, and shaped by the values of executives and the organization, and how improved professionalism can only be achieved through the adoption of a value system that rewards contributions rather than the mere attainment of results.” The bottom line of this discussion is, how does the hotel industry reconcile its behavior with that of public perception? “The time has come for hoteliers to examine their own standards of ethics, value systems, and professionalism,” Haywood says. And it is ethics that are at the center of this issue; Haywood holds that component in an estimable position. “Hoteliers must become value-driven,” advises Haywood. “They must be committed to excellence both in actualizing their best potentialities and in excelling in all they do. In other words, the professionalization of the hotelier can be achieved through a high degree of self-control, internalized values, codes of ethics, and related socialization processes,” he expands. “Serious ethical issues exist for hoteliers as well as for many business people and professionals in positions of responsibility,” Haywood alludes in defining some inter-industry problems. “The acceptance of kickbacks and gifts from suppliers, the hiding of income from taxation authorities, the lack of interest in installing and maintaining proper safety and security systems, and the raiding of competitors' staffs are common practices,” he offers, with the reasoning that if these problems can occur within ranks, then there is going to be a negative backlash in the public/client arena as well. Haywood divides the key principles of his thesis statement - ethics, value systems, and professionalism – into specific elements, and then continues to broaden the scope of each element. Promotion, product/service, and pricing are additional key components in Haywood’s discussion, and he addresses each with verve and vitality. Haywood references the four character types - craftsmen, jungle fighters, company men, and gamesmen – via a citation to Michael Maccoby, in the portion of the discussion dedicated to morality and success. Haywood closes with a series of questions derived from Lawrence Miller's American Spirit, Visions of a New Corporate Culture, each question designed to focus, shape, and organize management's attention to the values that Miller sets forth in his piece.

Managing Quality in the Hospitality Industry:

In - Managing Quality In the Hospitality Industry – an observation by W. Gerald Glover, Associate Professor, Hospitality Management Program, Appalachian State University, initially Glover establishes: “Quality is a primary concern in the hospitality industry. The author sees problems in the nature of the way businesses are managed and discusses approaches to ensuring quality in corporate cultures.” As the title suggests, the author wants to point out certain discrepancies in hospitality quality control, as well as enlighten you as to how to address some of these concerns. “A discussion of quality presents some interesting dilemmas. Quality is something that almost everyone wants,” Assistant Professor Glover notes. “Service businesses will never admit that they don't provide it to their customers, and few people actually understand what it takes to make it happen,” he further maintains. Glover wants you to know that in a dynamic industry such as hospitality, quality is the common denominator. Whether it be hotel, restaurant, airline, et al., quality is the raison d’être of the industry. “Quality involves the consistent delivery of a product or service according to the expected standards,” Glover provides. Many, if not all quality deficiencies can be traced back to management, Glover declares. He bullet points some of the operational and guest service problems managers’ face on a daily basis. One important point of note is the measuring and managing of quality. “Standards management is another critical area in people and product management that is seldom effective in corporations,” says Glover. “Typically, this area involves performance documentation, performance evaluation and appraisal, coaching, discipline, and team-building.” “To be effective at managing standards, an organization must establish communication in realms where it is currently non-existent or ineffective,” Glover goes on to say. “Coaching, training, and performance appraisal are methods to manage individuals who are expected to do what's expected.” He alludes to the benefit quality circles supply as well. In addressing American organizational behavior, Glover postures, “…a realization must develop that people and product management are the primary influences on generating revenues and eventually influencing the bottom line in all American organizations.” Glover introduces the concept of pro-activity. “Most recently, quality assurance and quality management have become the means used to develop and maintain proactive corporate cultures. When prevention is the focus, quality is most consistent and expectations are usually met,” he offers. Much of the article is dedicated to, “Appendix A-Table 1-Characteristics of Corporate Cultures (Reactive and Proactive. In it, Glover measures the impact of proactive management as opposed to the reactive management intrinsic to many elements of corporate culture mentality.

Novel surface-tethered estrogen polymeric platforms in cardiovascular regenerative medicine

L’estradiol (E2) est une hormone femelle qui joue un rôle essentiel, à la fois dans la régulation et dans la détermination de certaines conditions physiologiques in vivo, telle que la différenciation et la prolifération cellulaire. Lorsque l’E2 est donné en supplément, par exemple dans le cas de thérapie hormonale, deux effets sont observés, un effet génomique et un effet non-génomique, de par son interaction avec les récepteurs à œstrogène du noyau ou de la membrane cellulaire, respectivement. L’effet non-génomique est plus difficile à étudier biologiquement parce que l’effet se produit sur une échelle de temps extrêmement courte et à cause de la nature hydrophobe de l’E2 qui réduit sa biodisponibilité et donc son accessibilité aux cellules cibles. C’est pourquoi il est nécessaire de développer des systèmes d’administration de l’E2 qui permettent de n’étudier que l’effet non-génomique de l’œstrogène. Une des stratégies employée consiste à greffer l’E2 à des macromolécules hydrophiles, comme de l’albumine de sérum bovin (BSA) ou des dendrimères de type poly(amido)amine, permettant de maintenir l’interaction de l’E2 avec les récepteurs d’œstrogène de la membrane cellulaire et d’éviter la pénétration de l’E2 dans le noyau des cellules. Toutefois, ces systèmes macromolécules-E2 sont critiquables car ils sont peu stables et l’E2 peut se retrouver sous forme libre, ce qui affecte sa localisation cellulaire. L’objectif de cette thèse est donc de développer de nouvelles plateformes fonctionnalisées avec de l’E2 en utilisant les approches de synthèses ascendantes et descendantes. Le but de ces plateformes est de permettre d’étudier le mécanisme de l’effet non-génomique de l’E2, ainsi que d’explorer des applications potentielles dans le domaine biomédical. L’approche ascendante est basée sur un ligand d’E2 activé, l’acide 17,α-éthinylestradiol-benzoïque, attaché de façon covalente à un polymère de chitosan avec des substitutions de phosphorylcholine (CH-PC-E2). L’estradiol est sous forme de pro-drogue attachée au polymère qui s’auto-assembler pour former un film. L’effet biologique de la composition chimique du film de chitosan-phosphorylcholine a été étudié sur des cellules endothéliales. Les films de compositions chimiques différentes ont préalablement été caractérisés de façon physicochimique. La topographie de la surface, la charge de surface, ainsi que la rhéologie des différents films contenant 15, 25, ou 40% molaires de phosphorylcholine, ont été étudiés par microscopie à force atomique (AFM), potentiel zêta, résonance plasmonique de surface et par microbalance à cristal de quartz avec dissipation (QCM-D). Les résultats de QCM-D ont montré que plus la part molaire en phosphorylcholine est grande moins il y a de fibrinogène qui s’adsorbe sur le film de CH-PC. Des cellules humaines de veine ombilicale (HUVECs) cultivées sur des films de CH-PC25 et de CH-PC40 forment des amas cellulaire appelés sphéroïdes au bout de 4 jours, alors que ce n’est pas le cas lorsque ces cellules sont cultivées sur des films de CH-PC15. L’attachement de l’estradiol au polymère a été caractérisé par plusieurs techniques, telles que la résonance magnétique nucléaire de proton (1H NMR), la spectroscopie infrarouge avec transformée de Fourier à réfraction totale atténuée (FTIR-ATR) et la spectroscopie UV-visible. La nature hydrogel des films (sa capacité à retenir l’eau) ainsi que l’interaction des films avec des récepteurs à E2, ont été étudiés par la QCM-D. Des études d’imagerie cellulaires utilisant du diacétate de diaminofluoresceine-FM ont révélé que les films hydrogels de CH-PC-E2 stimulent la production d’oxyde nitrique par les cellules endothéliales, qui joue un rôle protecteur pour le système cardiovasculaire. L’ensemble de ces études met en valeur les rôles différents et les applications potentielles qu’ont les films de type CH-PC-E2 et CH-PC dans le cadre de la médecine cardiovasculaire régénérative. L’approche descendante est basée sur l’attachement de façon covalente d’E2 sur des ilots d’or de 2 μm disposés en rangées et espacés par 12 μm sur un substrat en verre. Les ilots ont été préparés par photolithographie. La surface du verre a quant à elle été modifiée à l’aide d’un tripeptide cyclique, le cRGD, favorisant l’adhésion cellulaire. L’attachement d’E2 sur les surfaces d’or a été suivi et confirmé par les techniques de SPR et de QCM-D. Des études d’ELISA ont montré une augmentation significative du niveau de phosphorylation de la kinase ERK (marqueur important de l’effet non-génomique) après 1 heure d’exposition des cellules endothéliales aux motifs alternant l’E2 et le cRGD. Par contre lorsque des cellules cancéreuses sont déposées sur les surfaces présentant des motifs d’E2, ces cellules ne croissent pas, ce qui suggère que l’E2 n’exerce pas d’effet génomique. Les résultats de l’approche descendante montrent le potentiel des surfaces présentant des motifs d’E2 pour l’étude des effets non-génomiques de l’E2 dans un modèle in vitro.

The automation of protein crystal presentation for x ray diffraction experiments using standing acoustic waves in a microfluidic chip environment

As the pressure continues to grow on Diamond and the world's synchrotrons for higher throughput of diffraction experiments, new and novel techniques are required for presenting micron dimension crystals to the X ray beam. Currently this task is both labour intensive and primarily a serial process. Diffraction measurements typically take milliseconds but sample preparation and presentation can reduce throughput down to 4 measurements an hour. With beamline waiting times as long as two years it is of key importance for researchers to capitalize on available beam time, generating as much data as possible. Other approaches detailed in the literature [1] [2] [3] are very much skewed towards automating, with robotics, the actions of a human protocols. The work detailed here is the development and discussion of a bottom up approach relying on SSAW self assembly, including material selection, microfluidic integration and tuning of the acoustic cavity to order the protein crystals.

The automation of protein crystal presentation for X ray diffraction experiments using standing acoustic waves in a microfluidic chip environment

As the pressure continues to grow on Diamond and the world's synchrotrons for higher throughput of diffraction experiments, new and novel techniques are required for presenting micron dimension crystals to the X ray beam. Currently this task is both labour intensive and primarily a serial process. Diffraction measurements typically take milliseconds but sample preparation and presentation can reduce throughput down to 4 measurements an hour. With beamline waiting times as long as two years it is of key importance for researchers to capitalize on available beam time, generating as much data as possible. Other approaches detailed in the literature [1] [2] [3] are very much skewed towards automating, with robotics, the actions of a human protocols. The work detailed here is the development and discussion of a bottom up approach relying on SSAW self assembly, including material selection, microfluidic integration and tuning of the acoustic cavity to order the protein crystals.

AuxAg1-x alloy seeds: A way to control growth, morphology and defect formation in Ge nanowires

Germanium (Ge) nanowires are of current research interest for high speed nanoelectronic devices due to the lower band gap and high carrier mobility compatible with high K-dielectrics and larger excitonic Bohr radius ensuing a more pronounced quantum confinement effect [1-6]. A general way for the growth of Ge nanowires is to use liquid or a solid growth promoters in a bottom-up approach which allow control of the aspect ratio, diameter, and structure of 1D crystals via external parameters, such as precursor feedstock, temperature, operating pressure, precursor flow rate etc [3, 7-11]. The Solid-phase seeding is preferred for more control processing of the nanomaterials and potential suppression of the unintentional incorporation of high dopant concentrations in semiconductor nanowires and unrequired compositional tailing of the seed-nanowire interface [2, 5, 9, 12]. There are therefore distinct features of the solid phase seeding mechanism that potentially offer opportunities for the controlled processing of nanomaterials with new physical properties. A superior control over the growth kinetics of nanowires could be achieved by controlling the inherent growth constraints instead of external parameters which always account for instrumental inaccuracy. The high dopant concentrations in semiconductor nanowires can result from unintentional incorporation of atoms from the metal seed material, as described for the Al catalyzed VLS growth of Si nanowires [13] which can in turn be depressed by solid-phase seeding. In addition, the creation of very sharp interfaces between group IV semiconductor segments has been achieved by solid seeds [14], whereas the traditionally used liquid Au particles often leads to compositional tailing of the interface [15] . Korgel et al. also described the superior size retention of metal seeds in a SFSS nanowire growth process, when compared to a SFLS process using Au colloids [12]. Here in this work we have used silver and alloy seed particle with different compositions to manipulate the growth of nanowires in sub-eutectic regime. The solid seeding approach also gives an opportunity to influence the crystallinity of the nanowires independent of the substrate. Taking advantage of the readily formation of stacking faults in metal nanoparticles, lamellar twins in nanowires could be formed.

Fabrication of sub-10 nm lamellar structures by solvent vapour annealing of block copolymers

Fabrication of nanoscale patterns through the bottom-up approach of self-assembly of phase-separated block copolymers (BCP) holds promise for nanoelectronics applications. For lithographic applications, it is useful to vary the morphology of BCPs by monitoring various parameters to make “from lab to fab” a reality. Here I report on the solvent annealing studies of lamellae forming polystyrene-blockpoly( 4-vinylpyridine) (PS-b-P4VP). The high Flory-Huggins parameter (χ = 0.34) of PS-b-P4VP makes it an ideal BCP system for self-assembly and template fabrication in comparison to other BCPs. Different molecular weights of symmetric PS-b-P4VP BCPs forming lamellae patterns were used to produce nanostructured thin films by spin-coating from mixture of toluene and tetrahydrofuran(THF). In particular, the morphology change from micellar structures to well-defined microphase separated arrangements is observed. Solvent annealing provides a better alternative to thermal treatment which often requires long annealing periods. The choice of solvent (single and dual solvent exposure) and the solvent annealing conditions have significant effects on the morphology of films and it was found that a block neutral solvent was required to realize vertically aligned PS and P4VP lamellae. Here, we have followed the formation of microdomain structures with time development at different temperatures by atomic force microscopy (AFM). The highly mobilized chains phase separate quickly due to high Flory-Huggins (χ) parameter. Ultra-small feature size (~10 nm pitch size) nanopatterns were fabricated by using low molecular weight PSb- P4VP (PS and P4VP blocks of 3.3 and 3.1 kg mol-1 respectively). However, due to the low etch contrast between the blocks, pattern transfer of the BCP mask is very challenging. To overcome the etch contrast problem, a novel and simple in-situ hard mask technology is used to fabricate the high aspect ratio silicon nanowires. The lamellar structures formed after self-assembly of phase separated PS-b-P4VP BCPs were used to fabricate iron oxide nanowires which acted as hard mask material to facilitate the pattern transfer into silicon and forming silicon nanostructures. The semiconductor and optical industries have shown significant interest in two dimensional (2D) molybdenum disulphide (MoS2) as a potential device material due to its low band gap and high mobility. However, current methods for its synthesis are not ‘fab’ friendly and require harsh environments and processes. Here, I also report a novel method to prepare MoS2 layered structures via self-assembly of a PS-b-P4VP block copolymer system. The formation of the layered MoS2 was confirmed by XPS, Raman spectroscopy and high resolution transmission electron microscopy.

Novel surface-tethered estrogen polymeric platforms in cardiovascular regenerative medicine

L’estradiol (E2) est une hormone femelle qui joue un rôle essentiel, à la fois dans la régulation et dans la détermination de certaines conditions physiologiques in vivo, telle que la différenciation et la prolifération cellulaire. Lorsque l’E2 est donné en supplément, par exemple dans le cas de thérapie hormonale, deux effets sont observés, un effet génomique et un effet non-génomique, de par son interaction avec les récepteurs à œstrogène du noyau ou de la membrane cellulaire, respectivement. L’effet non-génomique est plus difficile à étudier biologiquement parce que l’effet se produit sur une échelle de temps extrêmement courte et à cause de la nature hydrophobe de l’E2 qui réduit sa biodisponibilité et donc son accessibilité aux cellules cibles. C’est pourquoi il est nécessaire de développer des systèmes d’administration de l’E2 qui permettent de n’étudier que l’effet non-génomique de l’œstrogène. Une des stratégies employée consiste à greffer l’E2 à des macromolécules hydrophiles, comme de l’albumine de sérum bovin (BSA) ou des dendrimères de type poly(amido)amine, permettant de maintenir l’interaction de l’E2 avec les récepteurs d’œstrogène de la membrane cellulaire et d’éviter la pénétration de l’E2 dans le noyau des cellules. Toutefois, ces systèmes macromolécules-E2 sont critiquables car ils sont peu stables et l’E2 peut se retrouver sous forme libre, ce qui affecte sa localisation cellulaire. L’objectif de cette thèse est donc de développer de nouvelles plateformes fonctionnalisées avec de l’E2 en utilisant les approches de synthèses ascendantes et descendantes. Le but de ces plateformes est de permettre d’étudier le mécanisme de l’effet non-génomique de l’E2, ainsi que d’explorer des applications potentielles dans le domaine biomédical. L’approche ascendante est basée sur un ligand d’E2 activé, l’acide 17,α-éthinylestradiol-benzoïque, attaché de façon covalente à un polymère de chitosan avec des substitutions de phosphorylcholine (CH-PC-E2). L’estradiol est sous forme de pro-drogue attachée au polymère qui s’auto-assembler pour former un film. L’effet biologique de la composition chimique du film de chitosan-phosphorylcholine a été étudié sur des cellules endothéliales. Les films de compositions chimiques différentes ont préalablement été caractérisés de façon physicochimique. La topographie de la surface, la charge de surface, ainsi que la rhéologie des différents films contenant 15, 25, ou 40% molaires de phosphorylcholine, ont été étudiés par microscopie à force atomique (AFM), potentiel zêta, résonance plasmonique de surface et par microbalance à cristal de quartz avec dissipation (QCM-D). Les résultats de QCM-D ont montré que plus la part molaire en phosphorylcholine est grande moins il y a de fibrinogène qui s’adsorbe sur le film de CH-PC. Des cellules humaines de veine ombilicale (HUVECs) cultivées sur des films de CH-PC25 et de CH-PC40 forment des amas cellulaire appelés sphéroïdes au bout de 4 jours, alors que ce n’est pas le cas lorsque ces cellules sont cultivées sur des films de CH-PC15. L’attachement de l’estradiol au polymère a été caractérisé par plusieurs techniques, telles que la résonance magnétique nucléaire de proton (1H NMR), la spectroscopie infrarouge avec transformée de Fourier à réfraction totale atténuée (FTIR-ATR) et la spectroscopie UV-visible. La nature hydrogel des films (sa capacité à retenir l’eau) ainsi que l’interaction des films avec des récepteurs à E2, ont été étudiés par la QCM-D. Des études d’imagerie cellulaires utilisant du diacétate de diaminofluoresceine-FM ont révélé que les films hydrogels de CH-PC-E2 stimulent la production d’oxyde nitrique par les cellules endothéliales, qui joue un rôle protecteur pour le système cardiovasculaire. L’ensemble de ces études met en valeur les rôles différents et les applications potentielles qu’ont les films de type CH-PC-E2 et CH-PC dans le cadre de la médecine cardiovasculaire régénérative. L’approche descendante est basée sur l’attachement de façon covalente d’E2 sur des ilots d’or de 2 μm disposés en rangées et espacés par 12 μm sur un substrat en verre. Les ilots ont été préparés par photolithographie. La surface du verre a quant à elle été modifiée à l’aide d’un tripeptide cyclique, le cRGD, favorisant l’adhésion cellulaire. L’attachement d’E2 sur les surfaces d’or a été suivi et confirmé par les techniques de SPR et de QCM-D. Des études d’ELISA ont montré une augmentation significative du niveau de phosphorylation de la kinase ERK (marqueur important de l’effet non-génomique) après 1 heure d’exposition des cellules endothéliales aux motifs alternant l’E2 et le cRGD. Par contre lorsque des cellules cancéreuses sont déposées sur les surfaces présentant des motifs d’E2, ces cellules ne croissent pas, ce qui suggère que l’E2 n’exerce pas d’effet génomique. Les résultats de l’approche descendante montrent le potentiel des surfaces présentant des motifs d’E2 pour l’étude des effets non-génomiques de l’E2 dans un modèle in vitro.

Table 1: Station list with macrobenthos biomass results from the ocean floor

Among the Siberian shelf seas the Kara Sea is most strongly influenced by riverine runoff with nearly 1500 km fresh water discharge per year. This fresh water, discharged mainly by Ob and Yenisei, contains about 3.1 * 106 and 4.6 * 106 tons of total organic carbon per year, respectively (Gordeev et al. 1996). Little is known about the relevance of this organic material for biological communities, neither for the Kara Sea nor for the adjacent deep basins of the central Arctic Ocean. Aiming at elucidating the fate of fluvial matter transported from the rivers via estuaries into the central Arctic Ocean and the relative importance of marine organic matter being produced such information is crucial. Here we present calculations on the organic carbon demand of the Kara Sea macrozoobenthos based on measured biomass (total wet weight [ww] per 0.25 m ) from quantitative box corer samples and empirical relationships between biomass, annual production, annual respiration, and carbon remineralisation. This bottom-up approach may serve as a first estimate of the carbon remineralization potential of a given zoobenthos community (or area) as long as no data on in situ respiration rates are available. Our data basis comprises 54 stations sampled in summer seasons 1997, 1999 and 2000 in the Kara Sea at water depths between 10 and 68 m. The geographical area represented by stations analysed covers roughly 178 000 km**2, which is about one fifth of the total Kara Sea area. In this area, 290 species of invertebrate macrozoobenthos were identified with polychaeta, Crustacea, mollusca and echinodermata being the most abundant. For all stations analysed, mean biomass values ranged between 4.3 and 778.1 g ww/m**2 with organic carbon demands between 3.5 and 43.2 mg C/m**2/d. For the area of 178 000 km2 a preliminary total consumption of 1.4 * 10**6t Corg/y (equivalent to 21.5 mg C/m**2/d) was calculated for the macrozoobenthos. An extrapolation of our data would lead to an annual carbon demand of about 5-7 * 106 t for the whole Kara Sea macrozoobenthos (or 15.5-21.7 mg C/m2/d).

Resilience and the ‘everyday’: beyond the paradox of ‘liberal peace’

Over the last decade there has been a shift towards critical understandings of ‘liberal peace’ approaches to international intervention, which argue that local culture holds the key to the effectiveness of peace interventions. In this ‘bottom-up’ approach, peace, reconciliation, and a ‘culture of law’ then become secondary effects of sociocultural norms and values. However, these liberal peace critiques have remained trapped in the paradox of liberal peace: the inability to go beyond the binaries of liberal universalism and cultural relativism. This understanding will be contrasted with the rise of ‘resilience’ approaches to intervention – which build on this attention to the particular context of application but move beyond this paradox through philosophical pragmatism and the focus on concrete social practices. This article clarifies the nature of this shift through the focus on the shifting understanding of international intervention to address the failings of the ‘war on drugs’ in the Americas.

Farmers' Resilience to Climate Change in the Welsh Marshes

Climate change will exacerbate challenges facing food security in the UK. Increasing frequency and intensity of extreme weather events will further impact upon farm systems. At the heart of the impending challenges to UK agricultural production, farmers’ resilience will be tested to new limits. Research into farmers’ resilience to climate change in the UK is distinctly underdeveloped when compared to research in developing and other developed nations. This research gap is addressed through exploration of farmers’ resilience in the Welsh Marches, establishing the role of risk perceptions, local knowledge and adaptive capacity in farmers’ decision-making to limit climate shocks. Further contributions to agricultural geography are made through experimentation of a ‘cultural-behavioural approach’, seeking to revisit the behavioural approach in view of the cultural-turn. The Welsh Marches, situated on the English-Welsh border, has been selected as a focal point due to its agricultural diversity, and known experiences of extreme weather events. A phased mixed methodological approach is adopted. Phase one explores recorded and reported experiences of past extreme weather events in local meteorological records and local newspaper articles. Phase two consists of 115 survey-questionnaires, 15 in-depth semi-structured interviews, and a scenario based focus group with selected farmers from the Welsh Marches. This allows farmers’ resilience to climate change in the past, present and future to be explored. Original contributions to knowledge are made through demonstrating the value of focusing upon the culture of a specific farm community, applying a ‘bottom-up’ approach. The priority given to the weather in farmers’ decision-making is identified to be determined by individual relationships that farmers’ develop with the weather. Yet, a consensus of farmers’ observations has established recognition of considerable changes in the weather over the last 30 years, acknowledging more extremes and seasonal variations. In contrast, perceptions of future climate change are largely varied. Farmers are found to be disengaged with the communication of climate change science, as the global impacts portrayed are distant in time and place from probable impacts that may be experienced locally. Current communication of climate change information has been identified to alienate farmers from the local reality of probable future impacts. Adaptation options and responses to extreme weather and climate change are identified from measures found to be already implemented and considered for the future. A greater need to explore local knowledge and risk perception in relation to farmers’ understanding of future climate challenges is clear. There is a need to conduct comparable research in different farm communities across the UK. Progression into establishing the role of farmers’ resilience in responding effectively to future climate challenges has only just begun.