E-Jurnal Universitas Tunas Husada Tasikmalaya
Not a member yet
22393 research outputs found
Sort by
Bank stock performance during the COVID-19 crisis: does efficiency explain why Islamic banks fared relatively better?
No full textThis paper evaluates the stock performance of Islamic banks relative to their conventional counterparts during the initial phase of the COVID-19 crisis (from December 31, 2019, to March 31, 2020). Using 426 banks from 48 countries, we find that stock returns of Islamic banks were about 10-13% higher than those of conventional banks after controlling for a host of the bank- and country-level variables. This study explains the Islamic banks' superior crisis stock performance by exploring the potential role of pre-crisis bank efficiency. In a univariate analysis, we document higher non-parametric Data Envelopment Analysis (DEA) efficiency levels for Islamic banks than conventional banks in the year preceding the COVID-19 crisis. Our multivariate regressions show that the risk-adjusted DEA efficiency scores can explain crisis stock returns for Islamic banks but not conventional banks. The evidence is robust to alternative measures of stock returns, efficiency models, and other empirical strategies. Finally, we present insight on the importance of key bank characteristics in determining the stock returns of conventional banks during the crisis period
Uptake of baits by wild badgers: Influences of deployment method, badger age and activity patterns on potential delivery of an oral vaccine
No full textAdvanced interventions in the pre-hospital resuscitation of patients with non-compressible haemorrhage after penetrating injuries
No full textEarly haemorrhage control and minimizing the time to definitive care have long been the cornerstones of therapy for patients exsanguinating from non-compressible haemorrhage (NCH) after penetrating injuries, as only basic treatment could be provided on scene. However, more recently, advanced on-scene treatments such as the transfusion of blood products, resuscitative thoracotomy (RT) and resuscitative endovascular balloon occlusion of the aorta (REBOA) have become available in a small number of pre-hospital critical care teams. Although these advanced techniques are included in the current traumatic cardiac arrest algorithm of the European Resuscitation Council (ERC), published in 2021, clear guidance on the practical application of these techniques in the pre-hospital setting is scarce. This paper provides a scoping review on how these advanced techniques can be incorporated into practice for the resuscitation of patients exsanguinating from NCH after penetrating injuries, based on available literature and the collective experience of several helicopter emergency medical services (HEMS) across Europe who have introduced these advanced resuscitation interventions into routine practice
Addressing inequity in palliative care provision for older people living with multimorbidity. Perspectives of community-dwelling older people on their palliative care needs: A scoping review
No full textTwitter Investor Sentiment and Corporate Earnings Announcements
No full textWe examine the impact of firm-specific investor sentiment (FSIS) on stock returns for negative and positive earnings surprises. Using a measure constructed from firm-specific tweets, we find that FSIS has a greater impact on stock returns for negative relative to positive earnings surprises. We further show that the impact of FSIS is greater for firms whose valuation is uncertain and difficult to arbitrage. Moreover, we provide evidence of return reversals over post-announcement periods. Our results highlight the importance of firm-specific investor sentiment around earnings announcements
Coherence dynamics in low-energy nuclear fusion
No full textLow-energy nuclear fusion reactions have been described using a dynami-cal coupled-channels density matrix method, based on the theory of open quantum systems. For the first time, this has been combined with an energy projection method, permitting the calculation of energy resolved fusion probabilities. The results are benchmarked against calculations using stationary Schrödinger dynamics and show excellent agreement. Calculations of entropy, energy dissipation and coherence were conducted, demonstrating the capability of this method. It is evident that the presence of quantum decoherence does not affect fusion probability. This framework provides a basis for quantum thermodynamic studies using thermal environments
Cooperatives as a Centrepiece for Formalizing Small-Scale Mining in Sub-Saharan Africa: Rationale, Benefits and Limitations
No full textThis chapter reflects critically on the impacts of moves made to date in sub-Saharan Africa to encourage people engaged in artisanal and small-scale mining (ASM) – low-tech, labour-intensive mineral extraction and processing – to form cooperatives. Whilst the pressures applied by host governments, international NGOs and industry bodies on the region’s ASM operators to organize themselves have been purposeful, pursued with a view to establishing more visible, monitorable structures at sites (points of production), compliance with newly-introduced standards and guidelines for cooperatives has proved burdensome for most. The moves made have complicated further what are already costly and bureaucratic procedures that prospective licensees must follow to formalize their activities. Most have targeted gold, diamonds, coloured gemstones and the 3Ts (tin, tungsten and tantalum), for which stringent criteria around responsible sourcing and transparency are now enshrined in a host of regulations and codes of practice across the OECD. The view here is that in sub-Saharan Africa, individuals engaged in ASM should be encouraged to form cooperatives but that such a strategy is best suited for ‘development minerals’, for which there is considerable local demand and established markets. Prioritizing ‘development minerals’ in this work would go a long way toward rewriting an ASM cooperative narrative in sub-Saharan Africa which is ineffective and no longer inspires. </p
A novel pathway for multiscale high-resolution time-resolved residual stress evaluation of laser-welded Eurofer97
No full textThe plasma-facing components of future fusion reactors, where the Eurofer97 is the primary structural material, will be assembled by laser-welding techniques. The heterogeneous residual stress induced by welding can interact with the microstructure, resulting in a degradation of mechanical properties and a reduction in joint lifetime. Here, a Xe+ plasma focused ion beam with digital image correlation (PFIB-DIC) and nanoindentation is used to reveal the mechanistic connection between residual stress, microstructure, and microhardness. This study is the first to use the PFIB-DIC to evaluate the time-resolved multiscale residual stress at a length scale of tens of micrometers for laser-welded Eurofer97. A nonequilibrium microscale residual stress is observed, which contributes to the macroscale residual stress. The microhardness is similar for the fusion zone and heat-affected zone (HAZ), although the HAZ exhibits around ~30% tensile residual stress softening. The results provide insight into maintaining structural integrity for this critical engineering challenge.</p
The Electronic Stability of Tin-Halide Perovskite Charged Regions
No full textWe report on the evolution of the electronic structure with partial oxidation state of tin and iodine from ASnI¬3 to model a space charged region¬, where A = CH3NH3(MA), CH(NH2)2 (FA) or Cs, with a view to develop stable long-term non-toxic halide-perovskite solar cells. Although charge cannot be directly removed from specific elements, we show reduction of the charge primarily of SnI3 in a hypothetical [ASnI3]2+ unit cell is calculated due to the valence band edge being dominated by Sn 5s and I 5p anti-bonding states, accompanied by a reduction in unit cell volume in [ASnI3]2+ compared to ASnI3. Band structure calculations show semiconducting behaviour in ASnI3, with metallic behaviour in [ASnII3]2+; a similar behaviour is also found for APbI3 and [APbI3]2+, where the Pb atoms partial charge than Sn. This research al-lows for the analysis of localised charged regions, directing the ultimate long-term electronic stability in perovskite solar absorbers, such as interface recombination and deep trap states