2,781 research outputs found
The United Kingdom and British Empire: A Figurational Approach
Drawing upon the work of Norbert Elias and the process [figurational] sociology perspective, this article examines how state formation processes are related to, and, affected by, expanding and declining chains of international interdependence. In contrast to civic and ethnic conceptions, this approach focuses on the emergence of the nation/nation-state as grounded in broader processes of historical and social development. In doing so, state formation processes within the United Kingdom are related to the expansion and decline of the British Empire. That is, by focusing on the functional dynamics that are embedded in collective groups, one is able to consider how the UK’s ‘state’ and ‘imperial’ figurations were interdependently related to changes in both the UK and the former British Empire. Consequently, by locating contemporary UK relations in the historical context of former imperial relationships, nationalism studies can go ‘beyond’ the nation/nation-state in order to include broader processes of imperial expansion and decline. Here, the relationship between empire and nationalism can offer a valuable insight into contemporary political movements, especially within former imperial groups
Serial killing and the postmodern self
© 2006 by SAGE PublicationsThe self has been a consistently central theme in philosophy and the social sciences and, in the last decades of the 20th century, the fragmentation of the modern self has engendered extensive academic commentary. In order to contribute to current discussions about self, it is perhaps most effective to map the transformation of a single representation of the self in contemporary culture. As a cultural ‘flashpoint’, the serial killer could provide an apposite analytical focus. Drawing critically on Mark Seltzer's work on serial killers this article interprets serial killing as a form of commodified transgression. In contrast to the modern self, established through state-institutionalized routines, serial killers establish their identities through ecstatic intercourse. These acts of bodily and ethical transgression are facilitated by the use of commodities. In this way, the serial killer represents a self which is consistent with the colonization of interpersonal relations by multinational capital. The serial killer signifies the appearance of a postmodern self
The impact of a special school placement on self-perceptions of confidence and competence among prospective PE teachers
School-based placements are often used as a way of preparing prospective teachers for the demands of their future role. However, little is known about the impact of such situated learning experiences on prospective PE teachers’ confidence and competence. To the best of our knowledge, this article is the first of its kind to explore prospective teachers’ views of, and experiences within, special schools in order to identify the experiential mechanisms that shape self-perceptions of competence and confidence when teaching pupils with special educational needs and disabilities in PE. Thirty-two final year undergraduate students participated in focus group interviews and were selected on the basis that they: (1) were studying a Special Educational Needs and Disability in PE undergraduate module; (2) aspired to be a PE teacher; and (3) had attended six half-days of placement in a special school. All focus group transcripts were subjected to open, axial and selective coding in order to identify themes and sub-themes. The themes that were constructed from the analysis were: impact of placement role on confidence and competence; impact of knowing pupils’ needs and capabilities; conceptualising confidence and perceptions of its development; and conceptualising competence and perceptions of its development. We use these themes to discuss the usefulness of special school-based placements for preparing aspiring teachers for their role as inclusive educators
a randomized, open, multicenter phase III trial of lenalidomide/dexamethasone versus lenalidomide/dexamethasone plus subsequent autologous stem cell transplantation and lenalidomide maintenance in patients with relapsed multiple myeloma
Background Despite novel therapeutic agents, most multiple myeloma (MM)
patients eventually relapse. Two large phase III trials have shown
significantly improved response rates (RR) of lenalidomide/dexamethasone
compared with placebo/dexamethasone in relapsed MM (RMM) patients. These
results have led to the approval of lenalidomide for RMM patients and
lenalidomide/dexamethasone has since become a widely accepted second-line
treatment. Furthermore, in RMM patients consolidation with high-dose
chemotherapy plus autologous stem cell transplantation has been shown to
significantly increase progression free survival (PFS) as compared to
cyclophosphamide in a phase III trial. The randomized prospective ReLApsE
trial is designed to evaluate PFS after lenalidomide/dexamethasone induction,
high-dose chemotherapy consolidation plus autologous stem cell transplantation
and lenalidomide maintenance compared with the well-established
lenalidomide/dexamethasone regimen in RMM patients. Methods/Design ReLApsE is
a randomized, open, multicenter phase III trial in a planned study population
of 282 RMM patients. All patients receive three lenalidomide/dexamethasone
cycles and - in absence of available stem cells from earlier harvesting -
undergo peripheral blood stem cell mobilization and harvesting. Subsequently,
patients in arm A continue on consecutive lenalidomide/dexamethasone cycles,
patients in arm B undergo high dose chemotherapy plus autologous stem cell
transplantation followed by lenalidomide maintenance until discontinuation
criteria are met. Therapeutic response is evaluated after the 3rd (arm A + B)
and the 5th lenalidomide/dexamethasone cycle (arm A) or 2 months after
autologous stem cell transplantation (arm B) and every 3 months thereafter
(arm A + B). After finishing the study treatment, patients are followed up for
survival and subsequent myeloma therapies. The expected trial duration is 6.25
years from first patient in to last patient out. The primary endpoint is PFS,
secondary endpoints include overall survival (OS), RR, time to best response
and the influence of early versus late salvage high dose chemotherapy plus
autologous stem cell transplantation on OS. Discussion This phase III trial is
designed to evaluate whether high dose chemotherapy plus autologous stem cell
transplantation and lenalidomide maintenance after lenalidomide/dexamethasone
induction improves PFS compared with the well-established continued
lenalidomide/dexamethasone regimen in RMM patients. Trial registration:
ISRCTN16345835 (date of registration 2010-08-24)
Role of the androgen receptor in breast cancer and preclinical analysis of enzalutamide
INTRODUCTION: The androgen receptor (AR) is widely expressed in breast cancers and has been proposed as a therapeutic target in estrogen receptor alpha (ER) negative breast cancers that retain AR. However, controversy exists regarding the role of AR, particularly in ER + tumors. Enzalutamide, an AR inhibitor that impairs nuclear localization of AR, was used to elucidate the role of AR in preclinical models of ER positive and negative breast cancer. METHODS: We examined nuclear AR to ER protein ratios in primary breast cancers in relation to response to endocrine therapy. The effects of AR inhibition with enzalutamide were examined in vitro and in preclinical models of ER positive and negative breast cancer that express AR. RESULTS: In a cohort of 192 women with ER + breast cancers, a high ratio of AR:ER (≥2.0) indicated an over four fold increased risk for failure while on tamoxifen (HR = 4.43). The AR:ER ratio had an independent effect on risk for failure above ER % staining alone. AR:ER ratio is also an independent predictor of disease-free survival (HR = 4.04, 95% CI: 1.68, 9.69; p = 0.002) and disease specific survival (HR = 2.75, 95% CI: 1.11, 6.86; p = 0.03). Both enzalutamide and bicalutamide inhibited 5-alpha-dihydrotestosterone (DHT)-mediated proliferation of breast cancer lines in vitro; however, enzalutamide uniquely inhibited estradiol (E2)-mediated proliferation of ER+/AR + breast cancer cells. In MCF7 xenografts (ER+/AR+) enzalutamide inhibited E2-driven tumor growth as effectively as tamoxifen by decreasing proliferation. Enzalutamide also inhibited DHT- driven tumor growth in both ER positive (MCF7) and negative (MDA-MB-453) xenografts, but did so by increasing apoptosis. CONCLUSIONS: AR to ER ratio may influence breast cancer response to traditional endocrine therapy. Enzalutamide elicits different effects on E2-mediated breast cancer cell proliferation than bicalutamide. This preclinical study supports the initiation of clinical studies evaluating enzalutamide for treatment of AR(+) tumors regardless of ER status, since it blocks both androgen- and estrogen- mediated tumor growth
Mixed Th1 and Th2 Mycobacterium tuberculosis-specific CD4 T cell responses in patients with active pulmonary tuberculosis from Tanzania.
Mycobacterium tuberculosis (Mtb) and helminth infections elicit antagonistic immune effector functions and are co-endemic in several regions of the world. We therefore hypothesized that helminth infection may influence Mtb-specific T-cell immune responses. We evaluated the cytokine profile of Mtb-specific T cells in 72 individuals with pulmonary TB disease recruited from two Sub-Saharan regions with high and moderate helminth burden i.e. 55 from Tanzania (TZ) and 17 from South Africa (SA), respectively. We showed that Mtb-specific CD4 T-cell functional profile of TB patients from Tanzania are primarily composed of polyfunctional Th1 and Th2 cells, associated with increased expression of Gata-3 and reduced expression of T-bet in memory CD4 T cells. In contrast, the cytokine profile of Mtb-specific CD4 T cells of TB patients from SA was dominated by single IFN-γ and dual IFN-γ/TNF-α and associated with TB-induced systemic inflammation and elevated serum levels of type I IFNs. Of note, the proportion of patients with Mtb-specific CD8 T cells was significantly reduced in Mtb/helminth co-infected patients from TZ. It is likely that the underlying helminth infection and possibly genetic and other unknown environmental factors may have caused the induction of mixed Th1/Th2 Mtb-specific CD4 T cell responses in patients from TZ. Taken together, these results indicate that the generation of Mtb-specific CD4 and CD8 T cell responses may be substantially influenced by environmental factors in vivo. These observations may have major impact in the identification of immune biomarkers of disease status and correlates of protection
Informed Conditioning on Clinical Covariates Increases Power in Case-Control Association Studies
Genetic case-control association studies often include data on clinical covariates, such as body mass index (BMI), smoking status, or age, that may modify the underlying genetic risk of case or control samples. For example, in type 2 diabetes, odds ratios for established variants estimated from low–BMI cases are larger than those estimated from high–BMI cases. An unanswered question is how to use this information to maximize statistical power in case-control studies that ascertain individuals on the basis of phenotype (case-control ascertainment) or phenotype and clinical covariates (case-control-covariate ascertainment). While current approaches improve power in studies with random ascertainment, they often lose power under case-control ascertainment and fail to capture available power increases under case-control-covariate ascertainment. We show that an informed conditioning approach, based on the liability threshold model with parameters informed by external epidemiological information, fully accounts for disease prevalence and non-random ascertainment of phenotype as well as covariates and provides a substantial increase in power while maintaining a properly controlled false-positive rate. Our method outperforms standard case-control association tests with or without covariates, tests of gene x covariate interaction, and previously proposed tests for dealing with covariates in ascertained data, with especially large improvements in the case of case-control-covariate ascertainment. We investigate empirical case-control studies of type 2 diabetes, prostate cancer, lung cancer, breast cancer, rheumatoid arthritis, age-related macular degeneration, and end-stage kidney disease over a total of 89,726 samples. In these datasets, informed conditioning outperforms logistic regression for 115 of the 157 known associated variants investigated (P-value = 1×). The improvement varied across diseases with a 16% median increase in χ2 test statistics and a commensurate increase in power. This suggests that applying our method to existing and future association studies of these diseases may identify novel disease loci
Natural Language Processing in Electronic Health Records in Relation to Healthcare Decision-making: A Systematic Review
Background: Natural Language Processing (NLP) is widely used to extract
clinical insights from Electronic Health Records (EHRs). However, the lack of
annotated data, automated tools, and other challenges hinder the full
utilisation of NLP for EHRs. Various Machine Learning (ML), Deep Learning (DL)
and NLP techniques are studied and compared to understand the limitations and
opportunities in this space comprehensively.
Methodology: After screening 261 articles from 11 databases, we included 127
papers for full-text review covering seven categories of articles: 1) medical
note classification, 2) clinical entity recognition, 3) text summarisation, 4)
deep learning (DL) and transfer learning architecture, 5) information
extraction, 6) Medical language translation and 7) other NLP applications. This
study follows the Preferred Reporting Items for Systematic Reviews and
Meta-Analyses (PRISMA) guidelines.
Result and Discussion: EHR was the most commonly used data type among the
selected articles, and the datasets were primarily unstructured. Various ML and
DL methods were used, with prediction or classification being the most common
application of ML or DL. The most common use cases were: the International
Classification of Diseases, Ninth Revision (ICD-9) classification, clinical
note analysis, and named entity recognition (NER) for clinical descriptions and
research on psychiatric disorders.
Conclusion: We find that the adopted ML models were not adequately assessed.
In addition, the data imbalance problem is quite important, yet we must find
techniques to address this underlining problem. Future studies should address
key limitations in studies, primarily identifying Lupus Nephritis, Suicide
Attempts, perinatal self-harmed and ICD-9 classification
Impacts of the Tropical Pacific/Indian Oceans on the Seasonal Cycle of the West African Monsoon
The current consensus is that drought has developed in the Sahel during the second half of the twentieth century as a result of remote effects of oceanic anomalies amplified by local land–atmosphere interactions. This paper focuses on the impacts of oceanic anomalies upon West African climate and specifically aims to identify those from SST anomalies in the Pacific/Indian Oceans during spring and summer seasons, when they were significant. Idealized sensitivity experiments are performed with four atmospheric general circulation models (AGCMs). The prescribed SST patterns used in the AGCMs are based on the leading mode of covariability between SST anomalies over the Pacific/Indian Oceans and summer rainfall over West Africa. The results show that such oceanic anomalies in the Pacific/Indian Ocean lead to a northward shift of an anomalous dry belt from the Gulf of Guinea to the Sahel as the season advances. In the Sahel, the magnitude of rainfall anomalies is comparable to that obtained by other authors using SST anomalies confined to the proximity of the Atlantic Ocean. The mechanism connecting the Pacific/Indian SST anomalies with West African rainfall has a strong seasonal cycle. In spring (May and June), anomalous subsidence develops over both the Maritime Continent and the equatorial Atlantic in response to the enhanced equatorial heating. Precipitation increases over continental West Africa in association with stronger zonal convergence of moisture. In addition, precipitation decreases over the Gulf of Guinea. During the monsoon peak (July and August), the SST anomalies move westward over the equatorial Pacific and the two regions where subsidence occurred earlier in the seasons merge over West Africa. The monsoon weakens and rainfall decreases over the Sahel, especially in August.Peer reviewe
Severe early onset preeclampsia: short and long term clinical, psychosocial and biochemical aspects
Preeclampsia is a pregnancy specific disorder commonly defined as de novo hypertension
and proteinuria after 20 weeks gestational age. It occurs in approximately 3-5% of pregnancies and it is still a major cause of both foetal and maternal morbidity and mortality worldwide1. As extensive research has not yet elucidated the aetiology of preeclampsia, there are no rational preventive or therapeutic interventions
available. The only rational treatment is delivery, which benefits the mother but is not in the interest of the foetus, if remote from term. Early onset preeclampsia (<32 weeks’ gestational age) occurs in less than 1% of pregnancies. It is, however often associated with maternal morbidity as the risk of progression
to severe maternal disease is inversely related with gestational age at onset2. Resulting prematurity is therefore the main cause of neonatal mortality and morbidity
in patients with severe preeclampsia3. Although the discussion is ongoing, perinatal survival is suggested to be increased in patients with preterm preeclampsia
by expectant, non-interventional management. This temporising treatment option to lengthen pregnancy includes the use of antihypertensive medication to control hypertension, magnesium sulphate to prevent eclampsia and corticosteroids
to enhance foetal lung maturity4. With optimal maternal haemodynamic status and reassuring foetal condition this results on average in an extension of 2 weeks. Prolongation of these pregnancies is a great challenge for clinicians to balance between potential maternal risks on one the eve hand and possible foetal benefits on the other. Clinical controversies regarding prolongation of preterm preeclamptic pregnancies still exist – also taking into account that preeclampsia is the leading cause of maternal mortality in the Netherlands5 - a debate which is even more pronounced in very preterm pregnancies with questionable foetal viability6-9. Do maternal risks of prolongation of these very early pregnancies outweigh
the chances of neonatal survival? Counselling of women with very early onset preeclampsia not only comprises of knowledge of the outcome of those particular pregnancies, but also knowledge of outcomes of future pregnancies of these women is of major clinical importance.
This thesis opens with a review of the literature on identifiable risk factors of preeclampsia
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