190 research outputs found

    Engineering Empire

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    This essay examines hydraulic engineers in Central Asia under tsarist rule and their participation in processes of agricultural expansion and empire-building in the imperial province of Turkestan. This province theoretically provided the perfect space in which Russians, who continually worried about their own “backwardness” in relation to Europe, could demonstrate their ability to be a colonial power on par with European empires, yet the lack of an understanding of irrigation engineering and the difficulties of irrigating arid regions threatened to jeopardize Russia’s efforts at a “civilizing mission.” Still, a growing group of Russian technical specialists was able to participate in scientific dialogue and transnational technological exchanges with other hydraulic engineers in other parts of the world who were similarly enthusiastic about the potential of science and technology to create a more modern future in the Russian Central Asian borderlands. Ultimately, however, even though the zeal of these Russian and foreign hydraulic experts coincided with Russian political ambitions in Turkestan, the political realities of the tsarist government’s position in the region would determine the fate of their grand visions for transformation.Cet article étudie la participation des ingénieurs en hydraulique en Asie centrale à l’époque impériale dans les processus d’expansion agricole et de renforcement de l’empire dans la province du Turkestan. A priori, cette province rassemblait tous les critères pour que les Russes, qui déploraient constamment leur « retard » vis-à-vis de l’Europe, puissent y faire la preuve de leur capacité à être un pouvoir colonial au même titre que les empires européens, mais leur méconnaissance de l’ingénierie en irrigation et les difficultés à irriguer des régions arides menaçaient de compromettre les efforts de la Russie dans sa « mission civilisatrice ». Pourtant, on comptait toujours davantage de techniciens russes capables de participer au dialogue scientifique et aux échanges technologiques transnationaux avec les ingénieurs en hydraulique étrangers, eux-mêmes tout aussi enthousiastes sur le potentiel de la science et de la technologie à créer un avenir plus moderne en Asie centrale russe. Finalement, cependant, même si le zèle de ces Russes et des experts hydrauliques étrangers coïncidait avec les ambitions politiques russes au Turkestan, les réalités politiques de la position du gouvernement impérial dans la région déterminèrent le destin de leurs grandes visions transformatrices

    Dual targeting of CCR2 and CX3CR1 in an arterial injury model of vascular inflammation

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    <p>Abstract</p> <p>Objectives</p> <p>The chemokine receptors CCR2 and CX3CR1 are important in the development of coronary artery disease. The purpose of this study is to analyze the effect of a novel CCR2 inhibitor in conjunction with CX3CR1 deletion on vascular inflammation.</p> <p>Methods</p> <p>The novel CCR2 antagonist MRL-677 was characterized using an in vivo model of monocyte migration. To determine the relative roles of CCR2 and CX3CR1 in vascular remodeling, normal or CX3CR1 deficient mice were treated with MRL-677. After 14 days, the level of intimal hyperplasia in the artery was visualized by paraffin sectioning and histology of the hind limbs.</p> <p>Results</p> <p>MRL-677 is a CCR2 antagonist that is effective in blocking macrophage trafficking in a peritoneal thioglycollate model. Intimal hyperplasia resulting from vascular injury was also assessed in mice. Based on the whole-blood potency of MRL-677, sufficient drug levels were maintained for the entire 14 day experimental period to afford good coverage of mCCR2 with MRL-677. Blocking CCR2 with MRL-677 resulted in a 56% decrease in the vascular injury response (n = 9, p < 0.05) in normal animals. Mice in which both CCR2 and CX3CR1 pathways were targeted (CX3CR1 KO mice given MRL-677) had an 88% decrease in the injury response (n = 6, p = 0.009).</p> <p>Conclusion</p> <p>In this study we have shown that blocking CCR2 with a low molecular weight antagonist ameliorates the inflammatory response to vascular injury. The protective effect of CCR2 blockade is increased in the presence of CX3CR1 deficiency suggesting that CX3CR1 and CCR2 have non-redundant functions in the progression of vascular inflammation.</p

    Integrated care for people with long-term mental and physical conditions in low- and middle-income countries: narrative review

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    Integrated care is defined as health services that are managed and delivered so that people receive a continuum of health promotion, disease prevention, diagnosis, treatment, disease-management, rehabilitation and palliative care services, coordinated across the different levels and sites of care within and beyond the health sector and, according to their needs, throughout the life course. This narrative review paper aims to describe the most relevant concepts and models of integrated care for people with chronic (or recurring) mental illness and comorbid physical health conditions, to assess the strength of evidence base for these models in high income countries (HICs) and in low- and middle-income countries (LMICs) through a conceptual overview and a structured narrative review, and to identify opportunities to further test the feasibility and impact of such integrated care models. The results of the review are presented in terms of; (i) the rationale for integrating care for people with mental disorders into chronic care; (ii) models of integrated care; (iii) evidence of the effects of integrating care in HICs and in LMICs; (iv) the key organisational challenges in LMICs to implement integrated chronic care; and (v) practical steps to realise a vision of integrated care in the future

    Creative and Stylistic Devices Employed by Children During a Storybook Narrative Task: A Cross-Cultural Study

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    Purpose: The purpose of this study was to analyze the effects of culture on the creative and stylistic features children employ when producing narratives based on wordless picture books. Method: Participants included 60 first- and second-grade African American, Latino American, and Caucasian children. A subset of narratives based on wordless picture books collected as part of a larger study was coded and analyzed for the following creative and stylistic conventions: organizational style (topic centered, linear, cyclical), dialogue (direct, indirect), reference to character relationships (nature, naming, conduct), embellishment (fantasy, suspense, conflict), and paralinguistic devices (expressive sounds, exclamatory utterances). Results: Many similarities and differences between ethnic groups were found. No significant differences were found between ethnic groups in organizational style or use of paralinguistic devices. African American children included more fantasy in their stories, Latino children named their characters more often, and Caucasian children made more references to the nature of character relationships. Conclusion: Even within the context of a highly structured narrative task based on wordless picture books, culture influences children’s production of narratives. Enhanced understanding of narrative structure, creativity, and style is necessary to provide ecologically valid narrative assessment and intervention for children from diverse cultural backgrounds

    Addressing the cross-country applicability of the theory of planned behaviour (TPB):A structured review of multi-country TPB studies

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    The theories of reasoned action and planned behaviour (TRA/TPB) have received substantial research interest from consumer behaviourists. One important area of interest which has not been adequately researched concerns the impact of national culture on the TRA/TPB components and interrelationships. To date, no systematic assessment of the impact of culture on the TRA/TPB model relationships has been undertaken. In order to understand the potential impact of culture on the TRA/TPB model relationships a structured review of TRA/TPB studies is undertaken. Studies that have quantitatively applied the TRA/TPB across at least two countries within a consumption domain since 2000 are reviewed. The authors propose that two of Hofstede�s cultural dimensions, individualism and power distance, may moderate the TRA/TPB relationships. The review highlights that the impact of subjective norm on intention varies most across countries, with the relationship between intention and both attitude and perceived behavioural control operating more similarly across country samples. Further, a systematic assessment of variation in the TRA/TPB model relationships via multilevel modelling shows that only the subjective norm-intention relationship varies across the countries studied. The relationship between subjective norm and intention is found to be influenced by power distance, with a stronger relationship evident in high power distance cultures. This review is the first of its kind and is of significance in addressing the emic versus etic nature of the TRA/TPB. Importantly, the article outlines relevant avenues and recommendations for future cross-national research utilizing the TRA/TPB

    An expression module of WIPF1-coexpressed genes identifies patients with favorable prognosis in three tumor types

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    Wiskott–Aldrich syndrome (WAS) predisposes patients to leukemia and lymphoma. WAS is caused by mutations in the protein WASP which impair its interaction with the WIPF1 protein. Here, we aim to identify a module of WIPF1-coexpressed genes and to assess its use as a prognostic signature for colorectal cancer, glioma, and breast cancer patients. Two public colorectal cancer microarray data sets were used for discovery and validation of the WIPF1 co-expression module. Based on expression of the WIPF1 signature, we classified more than 400 additional tumors with microarray data from our own experiments or from publicly available data sets according to their WIPF1 signature expression. This allowed us to separate patient populations for colorectal cancers, breast cancers, and gliomas for which clinical characteristics like survival times and times to relapse were analyzed. Groups of colorectal cancer, breast cancer, and glioma patients with low expression of the WIPF1 co-expression module generally had a favorable prognosis. In addition, the majority of WIPF1 signature genes are individually correlated with disease outcome in different studies. Literature gene network analysis revealed that among WIPF1 co-expressed genes known direct transcriptional targets of c-myc, ESR1 and p53 are enriched. The mean expression profile of WIPF1 signature genes is correlated with the profile of a proliferation signature. The WIPF1 signature is the first microarray-based prognostic expression signature primarily developed for colorectal cancer that is instrumental in other tumor types: low expression of the WIPF1 module is associated with better prognosis

    Linking Symptom Inventories using Semantic Textual Similarity

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    An extensive library of symptom inventories has been developed over time to measure clinical symptoms, but this variety has led to several long standing issues. Most notably, results drawn from different settings and studies are not comparable, which limits reproducibility. Here, we present an artificial intelligence (AI) approach using semantic textual similarity (STS) to link symptoms and scores across previously incongruous symptom inventories. We tested the ability of four pre-trained STS models to screen thousands of symptom description pairs for related content - a challenging task typically requiring expert panels. Models were tasked to predict symptom severity across four different inventories for 6,607 participants drawn from 16 international data sources. The STS approach achieved 74.8% accuracy across five tasks, outperforming other models tested. This work suggests that incorporating contextual, semantic information can assist expert decision-making processes, yielding gains for both general and disease-specific clinical assessment
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