Think the war on doping is a force for good? Its ideals have been compromised all along

First paragraph: No doubt Lance Armstrong is still digesting the news that he has to repay $10m (£6.4m) to previous sponsors following a ruling by an arbitration panel a few weeks ago. This is on top of the lifetime ban from all sporting competitions that he was given several years back. Many probably think he got the punishment he deserved, but was it done fairly?  Read this article on The Conversation website: https://theconversation.com/think-the-war-on-doping-is-a-force-for-good-its-ideals-have-been-compromised-all-along-3812

Sport is not clean: doping could be prevented if athletes had chaperones

First paragraph: Sport is facing a critical moment. As we head into a big sporting summer, unanswered questions cast a large shadow over many high-profile athletes and countries. The ongoing legal appeals from Russian athletes, the unresolved Chris Froome sanction, minimal testing in some sports and countries, and calls for tougher measures all point towards a need for new solutions

Morning flight behavior of nocturnally migrating birds along the western basin of Lake Erie

Many species of birds that normally migrate during the night have been observed engaging in so‐called morning flights during the early morning. The results of previous studies have supported the hypothesis that one function of morning flights is to compensate for wind drift that birds experienced during the night. Our objective was to further explore this hypothesis in a unique geographic context. We determined the orientation of morning flights along the southern shore of Lake Erie\u27s western basin during the spring migrations of 2016 and 2017. This orientation was then compared to the observed orientation of nocturnal migration. Additionally, the orientation of the birds engaged in morning flights following nights with drifting winds was compared to that of birds following nights with non‐drifting winds. The morning flights of most birds at our observation site were oriented to the west‐northwest, following the southern coast of Lake Erie. Given that nocturnal migration was oriented generally east of north, the orientation of morning flight necessarily reflected compensation for accumulated, seasonal wind drift resulting from prevailingly westerly winds. However, the orientation of morning flights was similar following nights with drifting and non‐drifting winds, suggesting that birds on any given morning were not necessarily re‐orienting as an immediate response to drift that occurred the previous night. Given the topographical characteristics of our observation area, the west‐northwest movement of birds in our study is likely best explained as a more complex interaction that could include some combination of compensation for wind drift, a search for suitable stopover habitat, flying in a direction that minimizes any loss in progressing northward toward the migratory goal, and avoidance of a lake crossing

Carbon isotope fractionation in protoplanetary disks

We investigate the gas-phase and grain-surface chemistry in the inner 30 AU of a typical protoplanetary disk using a new model which calculates the gas temperature by solving the gas heating and cooling balance and which has an improved treatment of the UV radiation field. We discuss inner-disk chemistry in general, obtaining excellent agreement with recent observations which have probed the material in the inner regions of protoplanetary disks. We also apply our model to study the isotopic fractionation of carbon. Results show that the fractionation ratio, 12C/13C, of the system varies with radius and height in the disk. Different behaviour is seen in the fractionation of different species. We compare our results with 12C/13C ratios in the Solar System comets, and find a stark contrast, indicative of reprocessing.Comment: 50 pages, 10 figures, accepted for publication in the Astrophysical Journa

Cancellous bone and theropod dinosaur locomotion. Part I—an examination of cancellous bone architecture in the hindlimb bones of theropods

This paper is the first of a three-part series that investigates the architecture of cancellous (‘spongy’) bone in the main hindlimb bones of theropod dinosaurs, and uses cancellous bone architectural patterns to infer locomotor biomechanics in extinct non-avian species. Cancellous bone is widely known to be highly sensitive to its mechanical environment, and has previously been used to infer locomotor biomechanics in extinct tetrapod vertebrates, especially primates. Despite great promise, cancellous bone architecture has remained little utilized for investigating locomotion in many other extinct vertebrate groups, such as dinosaurs. Documentation and quantification of architectural patterns across a whole bone, and across multiple bones, can provide much information on cancellous bone architectural patterns and variation across species. Additionally, this also lends itself to analysis of the musculoskeletal biomechanical factors involved in a direct, mechanistic fashion. On this premise, computed tomographic and image analysis techniques were used to describe and analyse the three-dimensional architecture of cancellous bone in the main hindlimb bones of theropod dinosaurs for the first time. A comprehensive survey across many extant and extinct species is produced, identifying several patterns of similarity and contrast between groups. For instance, more stemward non-avian theropods (e.g. ceratosaurs and tyrannosaurids) exhibit cancellous bone architectures more comparable to that present in humans, whereas species more closely related to birds (e.g. paravians) exhibit architectural patterns bearing greater similarity to those of extant birds. Many of the observed patterns may be linked to particular aspects of locomotor biomechanics, such as the degree of hip or knee flexion during stance and gait. A further important observation is the abundance of markedly oblique trabeculae in the diaphyses of the femur and tibia of birds, which in large species produces spiralling patterns along the endosteal surface. Not only do these observations provide new insight into theropod anatomy and behaviour, they also provide the foundation for mechanistic testing of locomotor hypotheses via musculoskeletal biomechanical modelling

An Exploration of the Eligibility Conditions for the 2024 Olympic Games: Russians Out, Belarussians In

In 2022, Russia launched a full-scale invasion of Ukraine. The attack was facilitated by Belarus, the territory that was used as a launchpad for Russia’s assault from the North on Ukraine’s capital Kyiv. In response to the invasion, some international sports federations decided to exclude athletes from these two countries, while others continued to regard them eligible. In early 2023, International Olympic Committee President Thomas Bach spoke out in favor of including Russian and Belarussian athletes in the Olympic Games under a neutral flag. He later explained his position as a defense of the Olympic principles as formulated in the Olympic charter. In this article, we examine if Bach’s position is justifiable, based on the Olympic charter. Our analysis leads us to the conclusion that it is not. Although we concede that individual athletes should not be held responsible for the unlawful acts of their country, we find that because of the way Russia conducts the war and exploits their athletes in its war propaganda, the principles outlined in the Olympic charter nevertheless justifies the exclusion of Russian athletes from the Paris Olympics. However, the exclusion of Belarusian athletes cannot be justified by the same principles as Belarus was not responsible for the outbreak of the war in Ukraine, does not actively take part in the war, and has not been at war with anyone since it reclaimed sovereignty after the breakup of the Soviet Union

Elite sport: time to scrap the therapeutic exemption system of banned medicines

First paragraph: Four-time Tour de France winnerChris Froome’spositive test for high levels of the asthma drugsalbutamolin September during the Vuelta a Espana race has prompted much debate on the rules surrounding medicines in sport. In essence, some drugs are not allowed, and others are allowed up to a threshold level under aTherapeutic Use Exemption(TUE). This creates problems in establishing the threshold level and around accidental over-use, but also opens the door to unethical behaviour

Motivation and coping with the stress of assessment: Gender differences in outcomes for university students

The main objectives of the present research were to test a conceptual model linking motivational processes involved in coping with the stress of university assessment, and to examine gender differences in these processes. Self-determined motivation was hypothesized to predict coping strategies and the response to assessment-related stress, and coping was hypothesized to play a considerable role in short- and long-term outcomes of assessment. We examined this model using multiple group path analysis. In Study 1 (N = 265), music students’ use of engagement-coping strategies led to stronger musical career intentions, while disengagement-coping strategies led to weaker intentions. In Study 2 (N = 340), students’ increased use of engagement coping, and decreased use of disengagement coping strategies led to higher grades, higher positive affect and lower negative affect. In both studies, engagement and disengagement-coping were predicted by autonomous and controlled motivation, respectively. Motivation also indirectly predicted academic outcomes through stress appraisal and coping. While women experienced higher levels of stress, men were more negatively affected by the use of disengagement-oriented coping. Gender differences were also found on the links between engagement-oriented coping and outcomes. These results fill an important gap in the literature regarding gender differences in the outcomes coping in education, as well as contributing to a better understanding of the processes linking motivation, coping and academic outcomes

Data-Driven Modelling for Harmonic Current Emission in Low-Voltage Grid Using MCReSANet with Interpretability Analysis

Even though the use of power electronics PE loads offers enhanced electrical energy conversion efficiency and control, they remain the primary sources of harmonics in grids. When diverse loads are connected in the distribution system, their interactions complicate establishing analytical models for the relationship between harmonic voltages and currents. To solve this, our paper presents a data-driven model using MCReSANet to construct the highly nonlinear between harmonic voltage and current. Two datasets from PCCs in Finland and Germany are utilized, which demonstrates that MCReSANet is capable of establishing accurate nonlinear mappings, even in the presence of various network characteristics for selected Finland and Germany datasets. The model built by MCReSANet can improve the MAE by 10% and 14% compared to the CNN, and by 8% and 17% compared to the MLP for both Finnish and German datasets, also showing much lower model uncertainty than others. This is a crucial prerequisite for more precise SHAP value-based feature importance analysis, which is a method for the model interpretability analysis in this paper. The results by feature importance analysis show the detailed relationships between each order of harmonic voltage and current in the distribution system. There is an interactive impact on each order of harmonic current, but some orders of harmonic voltages have a dominant influence on harmonic current emissions: positive sequence and zero sequence harmonics have the dominant importance in the Finnish and German networks, respectively, which conforms to the pattern of connected load types in two selected Finnish and German datasets. This paper enhances the potential for understanding and predicting harmonic current emissions by diverse PE loads in distribution systems, which is beneficial to more effective management for optimizing power quality in diverse grid environments

Pestivirus Apparent Prevalence in Sheep and Goats in Northern Ireland: A Serological Survey

Publication history: Accepted - 30 October 2020; Published - 12 January 2021.Background: Bovine viral diarrhoea virus (BVDV) and border disease virus (BDV) can cause significant health problems in ruminants and economic impacts for farmers. The aim of this study was to evaluate pestivirus exposure in Northern Ireland sheep and goat flocks, and to compare findings with a previous study from the region. Methods: Up to 20 animals were sampled from 188 sheep and 9 goat flocks (n = 3,418 animals; 3,372 sheep and 46 goats) for pestivirus antibodies. Differentiation of the causative agent in positive samples was inferred using serum neutralisation. Abortion samples from 177 ovine cases were tested by BVDV reverse-transcription polymerase chain reaction and antigen ELISA. Results: Apparent animal and flock (one antibody positive animal within a flock) prevalence was 1.7% and 17.3%, respectively, a statistically significant drop in apparent prevalence since a survey in 1999. 52.6% of samples testing positive had higher antibody titres to BVDV than to BDV. Of the ovine abortion samples, only one positive foetal fluid sample was detected by ELISA. Conclusion: The present study found that, since 1999, there has been a decrease in apparent animal and flock prevalence of 3.7 and 12.8 percentage points respectively, suggesting pestivirus prevalence has decreased across Northern Ireland between 1999 and 2018.This research was funded by the Department of Agriculture, Environment and Rural Affairs