3,900 research outputs found

    Order matters: How altering the sequence of performance events shapes perceived quality formation

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    Reputation research often employs rankings which combine both the prominence and perceived quality dimensions of reputation. Though this approach has merit, it neglects nuances in the formation of perceived firm quality – i.e., how stakeholders perceive a firm’s capabilities. Since perceptions are influenced by how information is presented, we posit that the patterns of a firm’s performances – their order and interval – explain variance in perceived quality beyond valence (absolute performance level), alone. We employ two experiments and an archival study to manipulate product ratings and collect perceived quality scores (experimentally), and use trajectory of performance outcomes to predict market valuation as a perceived quality proxy (archivally). Results suggest that while valence matters most for a firm’s perceived quality, presenting identical performance events with distinct orders and intervals changes perceived quality impressions, at least until new information is presented. We enumerate our findings and outline areas for future research on stakeholder perceptions

    Synoptic-scale and mesoscale controls for tornadogenesis on cold fronts: Shear-zone vortex-genesis in a developing frontal wave

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    High-resolution model simulations and radar observations are used to investigate the onset of vortex-genesis in a tornadic narrow cold-frontal rain band (NCFR). The timing and location of vortex-genesis was strongly constrained by a developing frontal wave, which tracked northeast across the United Kingdom and Ireland on 17 October 2011. In the simulations, vortices occurred preferentially during the early stages of wave development and just down-front of the wave centre, where large increases in vertical vorticity occurred in concert with decreases in the cross-frontal confluence. Vortex-genesis ceased as the frontal wave matured, due to the onset of frontal fracture. Two distinct scales of vortex-genesis are documented: primary vortex-genesis on the meso-γ-scale, and secondary vortex-genesis on the miso-scale. We show that horizontal shearing instability is the most likely vortex-genesis mechanism, consistent with previous theoretical work on the stability of vertical vortex strips in the presence of horizontal stretching deformation. Secondary vortices occurred along the braid regions between primary vortices where the shear zone became particularly narrow and intense. In the model, these vortices developed extremely rapidly (from small perturbations to maximum vertical vorticity in 5–15 min) and the strongest exhibited near-surface vertical vorticity maxima approaching 10−1 s−1. Vortices of both scales were associated with characteristic local perturbations in the NCFR and we show, by comparison with radar reflectivity data, that primary and secondary vortices were likely present in the real NCFR. Tornado reports were associated with small NCFR perturbations like those associated with the secondary vortices in the model simulations. Analysis of the sub-structure of individual simulated vortices suggests that tornado-genesis is most likely within a region of intense near-surface vertical vorticity stretching at the north or northwest flank of the secondary vortices

    ‘It’s Breaking Quite Big Social Taboos’ Violence Against Women and Girls and Self-Defense Training in Nepal

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    Given the increased vulnerability to, and rise in reports of, sexual violence in post-disaster situations this article seeks to explore the role of self-defense programmes as a response to addressing violence against women and girls. It draws on the authors’ experience of post-earthquake Nepal in 2015. We argue that self-defense training can play a crucial role in challenging normative gender roles, raising confidence and self-esteem in girls and women during and post disaster, and call for further research to take place at the local level to explore this important issue further

    Safety Climate in Organizations

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    Safety climate is a collective construct derived from individuals' shared perceptions of the various ways that safety is valued in the workplace. Research over the past 35 years shows that safety climate is an important predictor of safety behavior and safety outcomes such as accidents and injury. We first review the conceptual foundations of safety climate and explore how the construct can be applied to different levels of analysis. We then review ways that safety climate influences individual processes of sense making, motivation, and work behavior. Next, we explore the impact of safety climate on organization-level outcomes related to both safety and productivity. We conclude with suggestions for future research and practice to support the overall safety of people and organizations

    TSPO interacts with VDAC1 and triggers a ROS-mediated inhibition of mitochondrial quality control

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    The 18-kDa TSPO (translocator protein) localizes on the outer mitochondrial membrane (OMM) and participates in cholesterol transport. Here, we report that TSPO inhibits mitochondrial autophagy downstream of the PINK1-PARK2 pathway, preventing essential ubiquitination of proteins. TSPO abolishes mitochondrial relocation of SQSTM1/p62 (sequestosome 1), and consequently that of the autophagic marker LC3 (microtubule-associated protein 1 light chain 3), thus leading to an accumulation of dysfunctional mitochondria, altering the appearance of the network. Independent of cholesterol regulation, the modulation of mitophagy by TSPO is instead dependent on VDAC1 (voltage-dependent anion channel 1), to which TSPO binds, reducing mitochondrial coupling and promoting an overproduction of reactive oxygen species (ROS) that counteracts PARK2-mediated ubiquitination of proteins. These data identify TSPO as a novel element in the regulation of mitochondrial quality control by autophagy, and demonstrate the importance for cell homeostasis of its expression ratio with VDAC1

    Violence Against Women and Girls in Humanitarian Crisis: Learning from the 2015 Nepal Earthquake

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    Violence against women and girls (VAWG) often increases after disasters and humanitarian crises. This article presents evidence from Nepal, a country where notable progress has been made on gender equality, but where VAWG continues to be an endemic. The 2015 April earthquake in Nepal led to an increase in reporting of VAWG, and women and girls in camps and temporary shelters reported fear and insecurity instilled by risk of violence and lack of privacy. Grassroots responses to the earthquake showed how humanitarian aid, emergency health care, and local disaster responses can challenge VAWG while offering safe spaces for women and girls. Research since the earthquakes with activists and non-government organisations (NGOs) indicates how disaster response efforts face continuous challenges posed by VAWG. This article draws on interviews with grassroots activists and NGO staff in Nepal, and shares experiences and lessons learnt that can help in addressing, challenging, and minimising VAWG in emergency situations and humanitarian crisis. This article is informed by thematic analysis of qualitative data from three separate studies, collected by employing semi-structured interviews, focus group discussions, and social media interaction with women and girls affected by the earthquake, women activists, and NGO staff. Our research highlights a number of barriers to addressing VAWG, such as preexisting vulnerabilities in low-income contexts, the breakdown of social/family networks, and lack of pre-crisis protection mechanisms. Further, our findings indicate that the cultural and socio-economic context influences women and girls’ experiences of violence during humanitarian crises. Our findings emphasise the importance of taking an intersectional and inclusive approach to ensure that all women, including the most vulnerable women and girls (those with disabilities, Dalits, older women, and single women) are included in prevention mechanisms, with a special focus on gender-based violence (GBV) risk assessment and protection interventions. Based on our research in Nepal, we make recommendations to practitioners and policy makers for interventions which address VAWG in humanitarian crises

    Beyond motivation: Job and work design for development, health, ambidexterity, and more

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    Much research shows it is possible to design motivating work, which has positive consequences for individuals and their organizations. This article reviews research that adopts this motivational perspective on work design, and it emphasizes that it is important to continue to refine motivational theories. In light of continued large numbers of poor-quality jobs, attention must also be given to influencing practice and policy to promote the effective implementation of enriched work designs. Nevertheless, current and future work-based challenges mean that designing work for motivation is necessary but insufficient. This review argues that work design can be a powerful vehicle for learning and development, for maintaining and enhancing employees' physical and mental health, and for achieving control and flexibility simultaneously (for example, in the form of ambidexterity); all these outcomes are important given the challenges in today's workplaces. The review concludes by suggesting methodological directions

    Oscillations and interactions of dark and dark-bright solitons in Bose-Einstein condensates

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    Solitons are among the most distinguishing fundamental excitations in a wide range of non-linear systems such as water in narrow channels, high speed optical communication, molecular biology and astrophysics. Stabilized by a balance between spreading and focusing, solitons are wavepackets, which share some exceptional generic features like form-stability and particle-like properties. Ultra-cold quantum gases represent very pure and well-controlled non-linear systems, therefore offering unique possibilities to study soliton dynamics. Here we report on the first observation of long-lived dark and dark-bright solitons with lifetimes of up to several seconds as well as their dynamics in highly stable optically trapped 87^{87}Rb Bose-Einstein condensates. In particular, our detailed studies of dark and dark-bright soliton oscillations reveal the particle-like nature of these collective excitations for the first time. In addition, we discuss the collision between these two types of solitary excitations in Bose-Einstein condensates.Comment: 9 pages, 4 figure

    Impact of facial conformation on canine health: Brachycephalic Obstructive Airway Syndrome

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    The domestic dog may be the most morphologically diverse terrestrial mammalian species known to man; pedigree dogs are artificially selected for extreme aesthetics dictated by formal Breed Standards, and breed-related disorders linked to conformation are ubiquitous and diverse. Brachycephaly–foreshortening of the facial skeleton–is a discrete mutation that has been selected for in many popular dog breeds e.g. the Bulldog, Pug, and French Bulldog. A chronic, debilitating respiratory syndrome, whereby soft tissue blocks the airways, predominantly affects dogs with this conformation, and thus is labelled Brachycephalic Obstructive Airway Syndrome (BOAS). Despite the name of the syndrome, scientific evidence quantitatively linking brachycephaly with BOAS is lacking, but it could aid efforts to select for healthier conformations. Here we show, in (1) an exploratory study of 700 dogs of diverse breeds and conformations, and (2) a confirmatory study of 154 brachycephalic dogs, that BOAS risk increases sharply in a non-linear manner as relative muzzle length shortens. BOAS only occurred in dogs whose muzzles comprised less than half their cranial lengths. Thicker neck girths also increased BOAS risk in both populations: a risk factor for human sleep apnoea and not previously realised in dogs; and obesity was found to further increase BOAS risk. This study provides evidence that breeding for brachycephaly leads to an increased risk of BOAS in dogs, with risk increasing as the morphology becomes more exaggerated. As such, dog breeders and buyers should be aware of this risk when selecting dogs, and breeding organisations should actively discourage exaggeration of this high-risk conformation in breed standards and the show ring
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