876 research outputs found
Tinder blue, mental flu? Exploring the associations between Tinder use and well-being
While Tinder (i.e., a popular mobile dating app) has received quite
some research attention, its effects on users’ well-being have
rarely been addressed. The present study investigates the extent
to which Tinder users’ compulsive use, motives, subjective online
success and self-conscious social comparison are associated with
their well-being (i.e., joviality, sadness, and anxiety). In total, 296
(39% females; 90% heterosexuals) emerging adults who were
currently using Tinder completed an online survey. The results
suggest that while using Tinder compulsively and for relationship
seeking can increase joviality, they may trigger more negative
than positive affect. Moreover, feeling unsuccessful on Tinder and
making self-conscious social comparisons were positively
associated with sadness and anxiety, and negatively associated
with joviality. The results seem to imply that Tinder users need to
be aware of their compulsive Tinder use, relationship seeking
motive, unsuccessful feeling, and/or self-
Colossal Electroresistance and Colossal Magnetoresistance in Spinel Multiferroic CdCr2S4
Colossal magnetoresistance (CMR) and electroresistance (CER) induced by the
electric field in spinel multiferroic CdCr2S4 are reported. It is found that a
metal-insulator transition (MIT) in CdCr2S4 is triggered by the electrical
field. In magnetic fields, the resistivity of CdCr2S4 responds similarly to
that of CMR manganites. Combing previous reports, these findings make CdCr2S4
the unique compound to possess all four properties of the colossal
magnetocapacitive (CMC), colossal electrocapacitive (CEC), CER, and CMR. The
present results open a new venue for searching new materials to show CMR by
tuning electric and magnetic fields.Comment: 3 pages, 4 figures, accepted by Applied Physics Letter
Electron ionization (EI) mass spectra of Exo-Endo double-bond isomers of polycyano “push-pull” pentadienes derived from cycloalkylidene malonic acid derivatives
Manganese hexacyanomanganate open framework as a high-capacity positive electrode material for sodium-ion batteries
Potential applications of sodium-ion batteries in grid-scale energy storage, portable electronics and electric vehicles have revitalized research interest in these batteries. However, the performance of sodium-ion electrode materials has not been competitive with that of lithium-ion electrode materials. Here we present sodium manganese hexacyanomanganate (Na2MnII[Mn-II(CN)(6)]), an open-framework crystal structure material, as a viable positive electrode for sodium-ion batteries. We demonstrate a high discharge capacity of 209 mAh g(-1) at C/5 (40 mA g(-1)) and excellent capacity retention at high rates in a propylene carbonate electrolyte. We provide chemical and structural evidence for the unprecedented storage of 50% more sodium cations than previously thought possible during electrochemical cycling. These results represent a step forward in the development of sodium-ion batteries.open212
Antibody-mediated enhancement aggravates chikungunya virus infection and disease severity
The arthropod-transmitted chikungunya virus (CHIKV) causes a flu-like disease that is characterized by incapacitating arthralgia. The re-emergence of CHIKV and the continual risk of new epidemics have reignited research in CHIKV pathogenesis. Virus-specific antibodies have been shown to control virus clearance, but antibodies present at sub-neutralizing concentrations can also augment virus infection that exacerbates disease severity. To explore this occurrence, CHIKV infection was investigated in the presence of CHIKV-specific antibodies in both primary human cells and a murine macrophage cell line, RAW264.7. Enhanced attachment of CHIKV to the primary human monocytes and B cells was observed while increased viral replication was detected in RAW264.7 cells. Blocking of specific Fc receptors (FcγRs) led to the abrogation of these observations. Furthermore, experimental infection in adult mice showed that animals had higher viral RNA loads and endured more severe joint inflammation in the presence of sub-neutralizing concentrations of CHIKV-specific antibodies. In addition, CHIKV infection in 11 days old mice under enhancing condition resulted in higher muscles viral RNA load detected and death. These observations provide the first evidence of antibody-mediated enhancement in CHIKV infection and pathogenesis and could also be relevant for other important arboviruses such as Zika virus
Defining and assessing enterprise capability in schools
This paper describes the development of an instrument for assessing enterprise capability in schools. The approach to assessing enterprise capability builds on previous work by including three dimensions: self-efficacy, aspirations and knowledge and awareness. We find significant but weak associations between these three constructs suggesting that that, whilst they can be considered as providing a coherent description of enterprise capability they can also be regarded as distinct dimensions. The instrument also distinguishes between aspiration towards not-for-profit and for-profit enterprise and also between self-efficacy towards two broad enterprise capabilities: (i) project planning and (ii) working with people and information and two specific, market related capabilities: (iii) market risk and (iv) price and profit. We found only modest associations between students’ sense of enterpriser self-efficacy and their enterprise knowledge and awareness
Completion of fit notes by GPs: a mixed methods study
Aims: The aim of this study was to investigate the completion of fit notes by UK general practitioners (GPs). A series of actual fit notes issued to employed patients were examined, and their GPs’ reflections and experiences of fit note completion explored.
Methods: A mixed-methods design was used. Data were collected from copies of 94 fit notes issued to employed patients by 11 GPs, and from 86 questionnaires completed by these GPs reflecting on the fit notes they had issued. Face-to-face interviews were then conducted with each GP.
Results: Fit note completion is not meeting expectations for a number of reasons. These include the following: limited knowledge and awareness of the guidance in fit note completion; problems with the fit note format; lack of mandatory training in completing fit notes; lack of incentive to change practice; incomplete implementation of the electronic fit note; GPs’ lack of confidence in, and doubts about the appropriateness of performing this role.
Conclusion: If UK GPs are to continue their contractual responsibility for completing fit notes, further consideration of their education and training needs is urgently required. Weaknesses in the design and format of the fit note and the availability of the electronic version also need to be addressed
Alpha2 Macroglobulin-Like Is Essential for Liver Development in Zebrafish
Background: Alpha 2 Macroglobulin family members have been studied extensively with respect to their roles in physiology and human disease including innate immunity and Alzheimer’s disease, but little is known about a possible role in liver development loss-of-function in model systems. Principal Findings: We report the isolation of the zebrafish a2 macroglobulin-like (A2ML) gene and its specific expression in the liver during differentiation. Morpholino-based knock-down of A2ML did not block the initial formation of the liver primordium, but inhibited liver growth and differentiation. Significance: This report on A2ML function in zebrafish development provides the first evidence for a specific role of an A2M family gene in liver formation during early embryogenesis in a vertebrate
Youth, terrorism and education: Britain’s Prevent programme
Since the 7/7 bombings of July 2005, Britain has experienced a domestic terror threat posed by a small minority of young Muslims. In response, Britain has initiated ‘Prevent’, a preventative counter-terrorism programme. Building on previous, general critiques of Prevent, this article outlines and critically discusses the ways in which Prevent has approached young Muslims and their educational institutions. The article argues that, rather than trust in broader and non-stigmatising processes of anti-extremist education, the police-led Prevent has ‘engaged’ with and surveilled young Muslims. Within Prevent there is little evidence of educational processes that explicitly build youth resilience against extremism. Instead, Muslim youth are viewed as both ‘risky and at risk’ (Heath-Kelly, 2013), ‘at risk’ of catching the terrorist disease, with the contested model of ‘radicalisation’ and child protection concepts utilised to portray risks of exploitation by Islamist extremists that necessitate a deepening process of education-based surveillance. The article identifies non-stigmatising alternatives to the approach of Prevent, approaches of anti-extremism education that learn from previously problematic anti-racist educational efforts with white young people. This enables the article to advocate for enhanced human rights-based approaches of citizenship education (admittedly, in themselves contested) with all young people as the most effective way of building individual and collective youth resilience against terrorist ideologies
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