Drift as a Force of Evolution: A Manipulationist Account

Can evolutionary theory be properly characterised as a “theory of forces”, like Newtonian mechanics? One common criticism to this claim concerns the possibility to conceive genetic drift as a causal process endowed by a specific magnitude and direction. In this article, we aim to offer an original response to this criticism by pointing out a connection between the notion of force and the notion of explanatory depth, as depicted in Hitchcock and Woodward’s manipulationist account of causal explanation. In a nutshell, our argument is that, since force-explanations can be consistently reframed as deep explanations and vice versa, and the notion of drift can be characterised in manipulationist terms as constitutively intervening in evolutionary deep explanations, then drift-explanations can be consistently reframed as force-explanations, and drift can be properly considered as a force of evolution. Insofar as similar considerations may be extended also to other evolutionary factors – chiefly selection –, our analysis offers an important support to the claim that evolutionary theory is a theory of forces.info:eu-repo/semantics/publishedVersio

Data-driven quality improvement program to prevent hospitalisation and improve care of people living with coronary heart disease: Protocol for a process evaluation

Background: Practice-level quality improvement initiatives using rapidly advancing technology offers a multidimensional approach to reduce cardiovascular disease burden. For the “QUality improvement in primary care to prevent hospitalisations and improve Effectiveness and efficiency of care for people Living with heart disease” (QUEL) cluster randomised controlled trial, a 12-month quality improvement intervention was designed for primary care practices to use data and implement progressive changes using “Plan, Do, Study, Act” cycles within their practices with training in a series of interactive workshops. This protocol aims to describe the systematic methods to conduct a process evaluation of the data-driven intervention within the QUEL study. Methods: A mixed-method approach will be used to conduct the evaluation. Quantitative data collected throughout the intervention period, via surveys and intervention materials, will be used to (1) identify the key elements of the intervention and how, for whom and in what context it was effective; (2) determine if the intervention is delivered as intended; and (3) describe practice engagement, commitment and capacity associated with various intervention components. Qualitative data, collected via semi-structured interviews and open-ended questions, will be used to gather in-depth understanding of the (1) satisfaction, utility, barriers and enablers; (2) acceptability, uptake and feasibility, and (3) effect of the COVID-19 pandemic on the implementation of the intervention. Conclusion: Findings from the evaluation will provide new knowledge on the implementation of a complex, multi-component intervention at practice-level using their own electronic patient data to enhance secondary prevention of cardiovascular disease. Trial registration: Australian New Zealand Clinical Trials Registry (ANZCTR) number ACTRN12619001790134

Drought rewires the cores of food webs

Droughts are intensifying across the globe, with potentially devastating implications for freshwater ecosystems. We used new network science approaches to investigate drought impacts on stream food webs and explored potential consequences for web robustness to future perturbations. The substructure of the webs was characterized by a core of richly connected species surrounded by poorly connected peripheral species. Although drought caused the partial collapse of the food webs, the loss of the most extinction-prone peripheral species triggered a substantial rewiring of interactions within the networks’ cores. These shifts in species interactions in the core conserved the underlying core/periphery substructure and stability of the drought-impacted webs. When we subsequently perturbed the webs by simulating species loss in silico, the rewired drought webs were as robust as the larger, undisturbed webs. Our research unearths previously unknown compensatory dynamics arising from within the core that could underpin food web stability in the face of environmental perturbations

Autoimmune hepatitis in India: profile of an uncommon disease

BACKGROUND: Autoimmune hepatitis (AIH) has been reported to show considerable geographical variation in frequency and clinical manifestations. It is considered a rare cause of liver disease in India. The present study was undertaken to determine the incidence, clinical, biochemical and histological profile of AIH in this part of the world. METHODS: Patients presenting with acute or chronic liver disease between January 1999 and June 2002 were evaluated prospectively. AIH was diagnosed using the international autoimmune hepatitis group criteria. Workup included clinical, biochemical, USG, viral markers, UGI endoscopy, AI markers (ANA, SMA, Anti-LKM, AMA, RF, p-ANCA) using indirect immunofluorescence and liver biopsy if possible. RESULTS: Forty-one of 2401 (1.70%) patients were diagnosed to have autoimmune liver disease. Out of these, 38 had autoimmune hepatitis and the rest 3 had primary biliary cirrhosis. The mean age of the patients of autoimmune hepatitis was 36.2 (15.9) years, 34 (89.4%) were females, and the duration of symptoms was 20.3 (20.5) months. Nineteen (50%) of them presented with chronic hepatitis, 13 (34.2%) as cirrhosis, 5 (13.1%) with acute hepatitis and 1 (2.6%) with cholestatic hepatitis. The presentations were jaundice in 21 (55.2%), pedal edema and hepatomegaly in 17 (44.7%), splenomegaly in 13 (34.2%), encephalopathy, abdominal pain in 9 (23.6%) and fever in 8 (21%). Twelve had esophageal varices and 3 had bled. Biochemical parameters were ALT 187 (360) U/L, AST 157 (193) U/L, ALP 246 (254) U/L, globulin 4.1 (1.6) g/dL, albumin 2.8 (0.9) g/dL, bilirubin 5.2 (7.4) mg/dL, prothrombin time 17 (7) sec and ESR 47 (17) sec. The autoimmune markers were SMA (24), ANA (15), both SMA and ANA (4), AMA (1), rheumatoid factor (2), pANCA (1), and Anti-LKM in none. Thirty (79%) patients had definite AIH and eight (21%) had probable AI hepatitis. Associated autoimmune diseases was seen in 15/38 (39.4%), diabetes 4, hypothyroidism 3, vitiligo 2, thrombocytopenia 2, rheumatoid arthritis 2, Sjogren's syndrome 1 and autoimmune polyglandular syndrome III in 1. Viral markers were positive in two patients, one presenting as acute hepatitis and HEV-IgM positive and another anti-HCV positive. CONCLUSION: In India, autoimmune hepatitis is uncommon and usually presents with chronic hepatitis or cirrhosis, acute hepatitis being less common. Age at presentation was earlier but clinical parameters and associated autoimmune diseases were similar to that reported from the west. Primary biliary cirrhosis is rare. Type II AIH was not observed

Amplification of cox2 (∼620 bp) from 2 mg of Up to 129 Years Old Herbarium Specimens, Comparing 19 Extraction Methods and 15 Polymerases

During the past years an increasing number of studies have focussed on the use of herbarium specimens for molecular phylogenetic investigations and several comparative studies have been published. However, in the studies reported so far usually rather large amounts of material (typically around 100 mg) were sampled for DNA extraction. This equals an amount roughly equivalent to 8 cm2 of a medium thick leaf. For investigating the phylogeny of plant pathogens, such large amounts of tissue are usually not available or would irretrievably damage the specimens. Through systematic comparison of 19 DNA extraction protocols applied to only 2 mg of infected leaf tissue and testing 15 different DNA polymerases, we could successfully amplify a mitochondrial DNA region (cox2; ∼620 bp) from herbarium specimens well over a hundred years old. We conclude that DNA extraction and the choice of DNA polymerase are crucial factors for successful PCR amplification from small samples of historic herbarium specimens. Through a combination of suitable DNA extraction protocols and DNA polymerases, only a fraction of the preserved plant material commonly used is necessary for successful PCR amplification. This facilitates the potential use of a far larger number of preserved specimens for molecular phylogenetic investigation and provides access to a wealth of genetic information in preserved in specimens deposited in herbaria around the world without reducing their scientific or historical value

How does study quality affect the results of a diagnostic meta-analysis?

Background: The use of systematic literature review to inform evidence based practice in diagnostics is rapidly expanding. Although the primary diagnostic literature is extensive, studies are often of low methodological quality or poorly reported. There has been no rigorously evaluated, evidence based tool to assess the methodological quality of diagnostic studies. The primary objective of this study was to determine the extent to which variations in the quality of primary studies impact the results of a diagnostic meta-analysis and whether this differs with diagnostic test type. A secondary objective was to contribute to the evaluation of QUADAS, an evidence-based tool for the assessment of quality in diagnostic accuracy studies. Methods: This study was conducted as part of large systematic review of tests used in the diagnosis and further investigation of urinary tract infection (UTI) in children. All studies included in this review were assessed using QUADAS, an evidence-based tool for the assessment of quality in systematic reviews of diagnostic accuracy studies. The impact of individual components of QUADAS on a summary measure of diagnostic accuracy was investigated using regression analysis. The review divided the diagnosis and further investigation of UTI into the following three clinical stages: diagnosis of UTI, localisation of infection, and further investigation of the UTI. Each stage used different types of diagnostic test, which were considered to involve different quality concerns. Results: Many of the studies included in our review were poorly reported. The proportion of QUADAS items fulfilled was similar for studies in different sections of the review. However, as might be expected, the individual items fulfilled differed between the three clinical stages. Regression analysis found that different items showed a strong association with test performance for the different tests evaluated. These differences were observed both within and between the three clinical stages assessed by the review. The results of regression analyses were also affected by whether or not a weighting (by sample size) was applied. Our analysis was severely limited by the completeness of reporting and the differences between the index tests evaluated and the reference standards used to confirm diagnoses in the primary studies. Few tests were evaluated by sufficient studies to allow meaningful use of meta-analytic pooling and investigation of heterogeneity. This meant that further analysis to investigate heterogeneity could only be undertaken using a subset of studies, and that the findings are open to various interpretations. Conclusion: Further work is needed to investigate the influence of methodological quality on the results of diagnostic meta-analyses. Large data sets of well-reported primary studies are needed to address this question. Without significant improvements in the completeness of reporting of primary studies, progress in this area will be limited

A mathematical modelling tool for predicting survival of individual patients following resection of glioblastoma: a proof of principle

The prediction of the outcome of individual patients with glioblastoma would be of great significance for monitoring responses to therapy. We hypothesise that, although a large number of genetic-metabolic abnormalities occur upstream, there are two ‘final common pathways' dominating glioblastoma growth – net rates of proliferation (ρ) and dispersal (D). These rates can be estimated from features of pretreatment MR images and can be applied in a mathematical model to predict tumour growth, impact of extent of tumour resection and patient survival. Only the pre-operative gadolinium-enhanced T1-weighted (T1-Gd) and T2-weighted (T2) volume data from 70 patients with previously untreated glioblastoma were used to derive a ratio D/ρ for each patient. We developed a ‘virtual control' for each patient with the same size tumour at the time of diagnosis, the same ratio of net invasion to proliferation (D/ρ) and the same extent of resection. The median durations of survival and the shapes of the survival curves of actual and ‘virtual' patients subjected to biopsy or subtotal resection (STR) superimpose exactly. For those actually receiving gross total resection (GTR), as shown by post-operative CT, the actual survival curve lies between the ‘virtual' results predicted for 100 and 125% resection of the T1-Gd volume. The concordance between predicted (virtual) and actual survivals suggests that the mathematical model is realistic enough to allow precise definition of the effectiveness of individualised treatments and their site(s) of action on proliferation (ρ) and/or dispersal (D) of the tumour cells without knowledge of any other clinical or pathological information

Сельскохозяйственная кооперация Урала за 1926-27 хозяйственный год и за I квартал 1927-28 г.: материалы к III собранию уполномоченных Уралселькустсоюза

0|7|Общие условия и итоги работы с.-х. кооперации за отчетный период [c. 7]0|11|Направление и темп кооперирования [c. 11]0|13|Союзное строительство [c. 13]0|13|Социальный состав пайщиков и его регулирование [c. 13]0|16|Итоги перевыборной кампании [c. 16]0|17|Аппарат системы [c. 17]0|18|Направление и характер организационной работы системы [c. 18]0|19|Культработа [c. 19]0|20|Массовая работа [c. 20]0|20|Колхозное строительство [c. 20]0|22|Кредитная работа [c. 22]0|26|Торгово-посредническая деятельность [c. 26]0|30|Финансы [c. 30]0|33|Производственная деятельность [c. 33]0|34|Агрикультурная работа [c. 34]0|35|Кустарно-промысловая кооперация в системе сел.-хоз. кооперации [c. 35]0|38|Состояние и работа системы в I кв. 1927-28 г. [c. 38]0|39|Рост колхозного движения [c. 39]0|40|Товарооборот с.-х. кооперации [c. 40]0|41|Финансовое состояние системы [c. 41]0|41|Итоги и перспективы [c. 41]0|45|Таблицы [c. 45]1|45|Сельско-хозяйственная кооперация в 1926-28 году [c. 45]2|45|Организационное состояние [c. 45]3|46|Сеть кооперативов в районах деятельности союзов сельско-хоз. и куст. пром. кооперации Уралобласти по видам [c. 46]3|47|Число всех кооперативов и членов в них в районах деятельности отдельных союзов сел.-хоз. и куст.-пром. кооперации и процент кооперированности хозяйств по округам [c. 47]3|49|Социально-имущественный состав членов-пайщиков сел.-хоз. кредитных товариществ на 1 октября 1927 года [c. 49]3|50|Состав правлений и ревкомиссий низовой сети сельско-хозяйственной кооперации до и после перевыборов 1927-28 г. [c. 50]2|51|Финансовое состояние [c. 51]3|52|Сводные балансы по отдельным видам сельско-хозяйственных кооперативов на 1-Х-1926 г. и 1-Х-1927 г. [c. 52]3|53|Сводные балансы сельско-хозяйственных кредитных товариществ на 1 октября 1927 года по союзам [c. 53]3|54|Балансы (нетто) союзов сел.-хоз. куст.-пром. кооперации на 1 октября 26 г. и на 1 октября 27 г. [c. 54]3|56|Балансы Уралселькустсоюза на 1-Х-1926 г. и 1-Х-1927 года [c. 56]3|57|Использование фондов кооперирования бедноты в 1926-27 г. и создание таковых из прибылей 1926-27 г. по низовой сети [c. 57]2|59|Хозяйственная работа и ее результаты [c. 59]3|61|Оброт по продаже товаров отдельных звеньев сельско-хозяйственной кооперации по сортиментным группам за 1926-27 год [c. 61]3|62|Распределение торговых оборотов сель.-хоз, кредитных товариществ по контрагентам в 1926-27 г. [c. 62]3|63|Общеторговые расходы сел.-хоз. кредитных товариществ за 1926-27 год [c. 63]3|64|Доходы сельско-хозяйственных кредитных товариществ за 1926-1927 год [c. 64]3|65|Агрономические предприятия низовой сети сель.-хоз кооперации на 1-Х 1927 год [c. 65]3|66|Промышленные предприятия низовой сети сельско-хозяйственной кооперации на 1-Х-1927 г. [c. 66]3|67|Товарооборот союзов сельско-хозяйственной и кустарно-промысловой кооперации за 1926-27 год [c. 67]3|68|Покупка и продажа товаров по снабжению союзами с.-х. куст. промысл. кооперации с разбивкой на контрагентов в 1926-27 г. [c. 68]3|69|Покупка и продажа товаров по сбыту союзами сел.-хоз. куст. пром. кооперации с разбивкой на контрагентов в 1926-27 году [c. 69]3|70|Доходы и обще-торговые расходы союзов сел.-хоз. и куст.-пром. кооперации в 1926-1927 году [c. 70]3|71|Наложение на себестоимость товаров в 1927-28 году [c. 71]2|72|Сельско-хозяйственная кооперация в I квартале 1927-28 года [c. 72]3|73|Сеть кооперативов в районе деятельности окружных и районных союзов, входящих в систему областного союза сел.-хоз. кооперации на 1-Х-27 г. и 1-I-1928 г. [c. 73]3|74|Число всех кооперативов и членов в них по отдельным союзам и процент кооперированости хозяйств по округам [c. 74]3|75|Сводные балансы с.-хоз. кредитных товариществ на 1 октября 27 г. и 1 января 1928 г. [c. 75]3|76|Сводные балансы (нетто) 1-ти окружных и районных союзов сел.-хоз. кооперации на 1-Х-27 и 1-I -28 г. [c. 76]3|78|Балансы (нетто) Уралселькустсоюза на 1/I-27 г., 1/I-28 г. и 1-IV-28 г. [c. 78]3|80|Оборот по продаже товаров союзов сельско-хозяйственной кооперации за I кварта 1927-28 года [c. 80]3|81|Обще-торговые расходы союзов сел.-хоз. кооперации в I квартале 1927-28 года [c. 81]3|82|Товарооборот и обще-торговые расходы союзов сел.-хоз. кооперации [c. 82]2|83|Текущие кампании [c. 83]3|84|Паевая кампания [c. 84]3|85|Перевыборная кампания 1927-28 г. [c. 85]3|85|Общие перевыборные собрания членов пайщиков сел.-хоз. кооперации в 1927-1928 году [c. 85]3|86|Перевыборные собрания уполномоченных сельско-хозяйственных к-вово в 1917-28 году [c. 86]0|87|Пояснения к таблицам [c. 87]0|90|Оглавление [c. 90

Smoking, alcohol consumption, physical activity, and family history and the risks of acute myocardial infarction and unstable angina pectoris: a prospective cohort study

<p>Abstract</p> <p>Background</p> <p>Few studies investigated the association between smoking, alcohol consumption, or physical activity and the risk of unstable angina pectoris (UAP), while the strength of these associations may differ compared to other coronary diseases such as acute myocardial infarction (AMI). Therefore, we investigated whether the associations of these lifestyle factors with UAP differed from those with AMI. Additionally, we investigated whether these effects differed between subjects with and without a family history of myocardial infarction (MI).</p> <p>Methods</p> <p>The CAREMA study consists of 21,148 persons, aged 20-59 years at baseline and randomly sampled from the Maastricht region in 1987-1997. At baseline, all participants completed a self-administered questionnaire. After follow-up of maximally 16.9 years, 420 AMI and 274 UAP incident cases were registered. Incidence rate ratios (RRs) were estimated using Cox proportional hazards models.</p> <p>Results</p> <p>For both diseases, smoking increased the risk while alcohol consumption was associated with a protective effect. Associations with both risk factors were stronger for AMI than UAP, although this difference was only statistically significant for smoking. In men, an inverse association was found with physical activity during leisure time which seemed to be stronger for the risk of UAP than of AMI. On the contrary, physical activity during leisure time was associated with an increased risk of both AMI and UAP in women which seemed to be weaker for UAP than for AMI. Except for occupational physical activity in women, no significant interactions on a multiplicative scale were found between the lifestyle factors and family history of MI. Nevertheless, the highest risks were found in subjects with both a positive family history and the most unfavorable level of the lifestyle factors.</p> <p>Conclusions</p> <p>The strength of the associations with the lifestyle factors did not differ between AMI and UAP, except for smoking. Furthermore, the effects of the lifestyle factors on the risk of both coronary diseases were similar for subjects with and without a positive family history.</p

Smoking in film in New Zealand: measuring risk exposure

BACKGROUND: Smoking in film is a risk factor for smoking uptake in adolescence. This study aimed to quantify exposure to smoking in film received by New Zealand audiences, and evaluate potential interventions to reduce the quantity and impact of this exposure. METHODS: The ten highest-grossing films in New Zealand for 2003 were each analysed independently by two viewers for smoking, smoking references and related imagery. Potential interventions were explored by reviewing relevant New Zealand legislation, and scientific literature. RESULTS: Seven of the ten films contained at least one tobacco reference, similar to larger film samples. The majority of the 38 tobacco references involved characters smoking, most of whom were male. Smoking was associated with positive character traits, notably rebellion (which may appeal to adolescents). There appeared to be a low threshold for including smoking in film. Legislative or censorship approaches to smoking in film are currently unlikely to succeed. Anti-smoking advertising before films has promise, but experimental research is required to demonstrate cost effectiveness. CONCLUSION: Smoking in film warrants concern from public health advocates. In New Zealand, pre-film anti-smoking advertising appears to be the most promising immediate policy response