4,702 research outputs found
Towards a Theory of Constrained Relativism: Comparing and Combining the Work of Pierre Bourdieu, Mary Douglas and Michael Thompson, and Alan Fiske
In this article, I seek to compare Pierre Bourdieu\'s theory of practice, the cultural theory developed by Mary Douglas and Michael Thompson, and the relational models theory pioneered by Alan Fiske, and attempt to sketch how these theories could possibly be combined. I argue that the three theories are among the most interesting conceptual enterprises in the social sciences of the last few decades, as they all represent –quite similar– syntheses of long-standing social-science dualisms, such as objectivism vs. subjectivism, social structure vs. free will, functionalism vs. social conflict, etc. Besides these commonalities, I spell out the relative strengths and weaknesses of each of these approaches. This allows me to conclude by considering whether, and how, it might be possible to synthesise these syntheses by picking the most interesting features of the three theories, and avoiding their less appealing ones.[No keywords]
Application of the Waveform Relaxation Technique to the Co-Simulation of Power Converter Controller and Electrical Circuit Models
In this paper we present the co-simulation of a PID class power converter
controller and an electrical circuit by means of the waveform relaxation
technique. The simulation of the controller model is characterized by a
fixed-time stepping scheme reflecting its digital implementation, whereas a
circuit simulation usually employs an adaptive time stepping scheme in order to
account for a wide range of time constants within the circuit model. In order
to maintain the characteristic of both models as well as to facilitate model
replacement, we treat them separately by means of input/output relations and
propose an application of a waveform relaxation algorithm. Furthermore, the
maximum and minimum number of iterations of the proposed algorithm are
mathematically analyzed. The concept of controller/circuit coupling is
illustrated by an example of the co-simulation of a PI power converter
controller and a model of the main dipole circuit of the Large Hadron Collider
A phase I and pharmacokinetic study of weekly paclitaxel and carboplatin in patients with metastatic esophageal cancer
PURPOSE: To determine the maximum-tolerated dose, toxicity profile, and
pharmacokinetics of a fixed dose of paclitaxel followed by increasing
doses of carboplatin, given weekly to patients with advanced esophageal or
gastric junction cancer. EXPERIMENTAL DESIGN: Paclitaxel was administered
on day 1 as a 1-h infusion at a fixed dose of 100 mg/m(2) followed by a
1-h infusion of carboplatin targeting an area under the curve (AUC) of 2-5
mg x min/ml, with cycles repeated on days 8, 15, 29, 36, and 43. RESULTS:
Forty patients [36 males; median (range) age, 57 (40-74) years] were
enrolled. Dose-limiting toxicity was observed at a carboplatin AUC of 5 mg
x min/ml and consisted of treatment delay attributable to
myelosuppression. No grade 3/4 treatment-related nonhematological toxicity
was observed. The highest dose intensity (>95% of the planned dose over
time) was achieved with a carboplatin AUC of 4 mg x min/ml. The mean
(+/-SD) AUCs of unbound (Cu) and total paclitaxel were 0.662 +/- 0.186 and
7.37 +/- 1.33 micro M x h, respectively. Clearance of Cu was 188 +/- 44.6
liter/h/m(2), which is not significantly different from historical data (P
= 0.52). Cremophor EL clearance was 123 +/- 23 ml/h/m(2), similar to
previous findings. Of 37 patients evaluable for response, 1 had complete
response, 19 had partial response, and 10 had stable disease, accounting
for an overall response rate of 54%. CONCLUSIONS: This regimen is very
tolerable and effective, and the recommended doses for additional studies
are paclitaxel (100 mg/m(2)), with carboplatin targeting an AUC of 4 mg x
min/ml
A cultural theory of populist leadership: fatalism, authoritarianism and the first Trump presidency
This article asks whether a unified framework can integrate established traits of populist leadership, propose novel ones, and link populist leaders to their social support. To do so, it uses Mary Douglas’s cultural theory, and especially its typology of four “ways of life” (hierarchy, egalitarianism, individualism and fatalism), in combination with Jan-Werner Müller’s definition of populism (as movements with leaders who claim to be the sole representatives of a homogenous people). This theoretical approach is illustrated through a congruence analysis of Donald J. Trump’s first presidency using secondary data. The analysis finds that the fatalistic way of life encapsulates populist leadership. All features of populist rule identified in the literature—such as corruption, nepotism, and protectionism—are consistent with fatalism. The framework also highlights additional traits (for instance, secretiveness, vengeance, and conspiracy-proneness) implied by fatalism. The Trump case exemplifies these arguments: his administration’s conspiratorial rhetoric, punitive governance style and zero-sum outlook reflect a fatalistic ethos. Crucially, cultural theory bridges leaders and followers: fatalism links the supply side of populism to its demand size. Overall, Douglas’s cultural theory unifies scattered populist traits under a coherent logic and provides a bridge between populist leadership and people’s support of such leadership. This integrated approach advances theoretical understanding of populist leadership while suggesting new avenues for empirical research
Fungicides and the grapevine wood mycobiome: a case study on Tracheomycotic Ascomycete Phaemoniella chlamydospora reveals potential for two novel control strategies
Original ResearchPhaeomoniella chlamydospora is a tracheomycotic fungus that colonizes the xylem of
grapevines (Vitis vinifera L.), causing wood discoloration, brown wood streaking, gummosis,
and wood necrosis, which negatively affect the overall health, productivity, and life span of
vines. Current control strategies to prevent or cope with P. chlamydospora infections are
frequently ineffective. Moreover, it is unclear how fungicides commonly applied in vineyards
against downy and powdery mildew agents affect the wood mycobiome, including wood
pathogens such as P. chlamydospora. In this study, we used next-generation sequencing to
assess the effects of foliar spray of grapevines with inorganic (copper oxychloride and sulfur),
synthetic (penconazole and fosetyl-aluminum), and natural (Blad) fungicides currently used
against the downy and powdery mildews. The subjects of our investigation were (i) the resident
wood mycobiome, (ii) the early colonization by a consortium of fungal wood endophytes
(ACEA1), (iii) the wood colonization success of P. chlamydospora, and (iv) the in planta
interaction between P. chlamydospora and ACEA1, under greenhouse conditions, in rooted
grapevine cuttings of cv. Cabernet Sauvignon. The data obtained suggest that the resident
mycobiome is affected by different fungicide treatments. In addition, the early colonization
success of the endophytes composing ACEA1 varied in response to fungicides, with relative
abundances of some taxa being overrepresented or underrepresented when compared with
the control. The wood colonization by P. chlamydospora comported significant changes in the
mycobiome composition, and in addition, it was greatly affected by the foliar spray with Blad,
which decreased the relative abundance of this pathogen 12-fold (4.9%) when compared
with the control (60.7%) and other treatments. The presence of the pathogen also decreased
considerably when co-inoculated into the plant with ACEA1, reaching relative abundances
between 13.9% and 2.0%, depending on the fungicide treatment applied. This study shows
that fungicides sprayed to prevent infections of powdery and downy mildews have an control strategies to fight P. chlamydospora, namely, the foliar spray with Blad and the use of
ACEA1. Further studies to confirm these results are requiredinfo:eu-repo/semantics/publishedVersio
Recommended from our members
Multi-ancestry study of blood lipid levels identifies four loci interacting with physical activity.
Many genetic loci affect circulating lipid levels, but it remains unknown whether lifestyle factors, such as physical activity, modify these genetic effects. To identify lipid loci interacting with physical activity, we performed genome-wide analyses of circulating HDL cholesterol, LDL cholesterol, and triglyceride levels in up to 120,979 individuals of European, African, Asian, Hispanic, and Brazilian ancestry, with follow-up of suggestive associations in an additional 131,012 individuals. We find four loci, in/near CLASP1, LHX1, SNTA1, and CNTNAP2, that are associated with circulating lipid levels through interaction with physical activity; higher levels of physical activity enhance the HDL cholesterol-increasing effects of the CLASP1, LHX1, and SNTA1 loci and attenuate the LDL cholesterol-increasing effect of the CNTNAP2 locus. The CLASP1, LHX1, and SNTA1 regions harbor genes linked to muscle function and lipid metabolism. Our results elucidate the role of physical activity interactions in the genetic contribution to blood lipid levels
Comprehensive evaluation of stool-based diagnostic methods and benzimidazole resistance markers to assess drug efficacy and detect the emergence of anthelmintic resistance : a Starworms study protocol
Background : To work towards reaching the WHO goal of eliminating soil-transmitted helminth (STH) infections as a public health problem, the total number of children receiving anthelmintic drugs has strongly increased over the past few years. However, as drug pressure levels rise, the development of anthelmintic drug resistance (AR) is more and more likely to appear. Currently, any global surveillance system to monitor drug efficacy and the emergence of possible AR is lacking. Consequently, it remains unclear to what extent the efficacy of drugs may have dropped and whether AR is already present. The overall aim of this study is to recommend the best diagnostic methods to monitor drug efficacy and molecular markers to assess the emergence of AR in STH control programs.
Methods : A series of drug efficacy trials will be performed in four STH endemic countries with varying drug pressure (Ethiopia and Brazil: low drug pressure, Lao PDR: moderate drug pressure and Tanzania: high drug pressure). These trials are designed to assess the efficacy of a single oral dose of 400 mg albendazole (ALB) against STH infections in school-aged children (SAC) by microscopic (duplicate Kato-Katz thick smear, Mini-FLOTAC and FECPAK(G2)) and molecular stool-based diagnostic methods (quantitative PCR (qPCR)). Data will be collected on the cost of the materials used, as well as the time required to prepare and examine stool samples for the different diagnostic methods. Following qPCR, DNA samples will also be submitted for pyrosequencing to assess the presence and prevalence of single nucleotide polymorphisms (SNPs) in the beta-tubulin gene. These SNPs are known to be linked to AR in animal STHs.
Discussion : The results obtained by these trials will provide robust evidence regarding the cost-efficiency and diagnostic performance of the different stool-based diagnostic methods for the assessment of drug efficacy in control programs. The assessment of associations between the frequency of SNPs in the beta-tubulin gene and the history of drug pressure and drug efficacy will allow the validation of these SNPs as a marker for AR in human STHs
- …
