Recent trends in green consumerism are leading the hotel industry to assume corporate social responsibility that may place the industry at the forefront of green innovation. Research reveals that ...adopting green practices is beneficial for the hotel and tourism industry. Nonetheless, a corporation's success in adopting green practices depends not only on corporate attitudes towards environmental issues but also on its employees' personal beliefs and everyday actions. This study fills the gap in existing research by adopting the concept of a “green organisational climate” and using personal belief variables to explore the contextual and individual variation in hotel employees' environmental behaviour. The results from two-level linear hierarchical models (HLM) show that individual- and group-level factors are significantly associated with the employees' environmental beliefs and behaviour. In other words, personal environmental norms explain within-hotel variance, but green organisational climates explain between-hotel variance and moderate the effect of personal environmental norms on employees' environmental behaviour. Greater emphasis on intense corporate engagement in incorporating environmental policies, human resources management and provision of environmental education for employees should be introduced and implemented.
•The individual- and hotel-level variables interaction with hotel's employees' green behaviour were analysed.•The term “green organisational climate” was coined and defined.•An 'organizational climate' variable moderates between personal green norms and behaviour.•Personal environmental norms have a stronger effect on employees' green behaviour than other variables.
Abstract
Energy efficiency is motivating the search for new high-temperature (high-T) metals. Some new body-centered-cubic (BCC) random multicomponent “high-entropy alloys (HEAs)” based on refractory ...elements (Cr-Mo-Nb-Ta-V-W-Hf-Ti-Zr) possess exceptional strengths at high temperatures but the physical origins of this outstanding behavior are not known. Here we show, using integrated in-situ neutron-diffraction (ND), high-resolution transmission electron microscopy (HRTEM), and recent theory, that the high strength and strength retention of a NbTaTiV alloy and a high-strength/low-density CrMoNbV alloy are attributable to edge dislocations. This finding is surprising because plastic flows in BCC elemental metals and dilute alloys are generally controlled by screw dislocations. We use the insight and theory to perform a computationally-guided search over 10
7
BCC HEAs and identify over 10
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possible ultra-strong high-T alloy compositions for future exploration.
Severe distortion is one of the four core effects in single‐phase high‐entropy alloys (HEAs) and contributes significantly to the yield strength. However, the connection between the atomic‐scale ...lattice distortion and macro‐scale mechanical properties through experimental verification has yet to be fully achieved, owing to two critical challenges: 1) the difficulty in the development of homogeneous single‐phase solid‐solution HEAs and 2) the ambiguity in describing the lattice distortion and related measurements and calculations. A single‐phase body‐centered‐cubic (BCC) refractory HEA, NbTaTiVZr, using thermodynamic modeling coupled with experimental verifications, is developed. Compared to the previously developed single‐phase NbTaTiV HEA, the NbTaTiVZr HEA shows a higher yield strength and comparable plasticity. The increase in yield strength is systematically and quantitatively studied in terms of lattice distortion using a theoretical model, first‐principles calculations, synchrotron X‐ray/neutron diffraction, atom‐probe tomography, and scanning transmission electron microscopy techniques. These results demonstrate that severe lattice distortion is a core factor for developing high strengths in refractory HEAs.
The lattice distortions of the NbTaTiV and NbTaTiVZr refractory high‐entropy alloys (HEAs) are quantitatively calculated and measured by various techniques. The relationship between the lattice distortion and yield strength is clearly demonstrated by the addition of Zr elements in an NbTaTiV HEA, resulting in an enhanced yield strength due to the increased lattice distortion.
Background
This study examines the predictive value of a novel systemic immune‐inflammation index (SII, platelet × neutrophil/lymphocyte ratio) in coronary artery disease (CAD) patients.
Methods
A ...total of 5602 CAD patients who had undergone a percutaneous coronary intervention (PCI) were enrolled. They were divided into two groups by baseline SII score (high SII vs low SII) to analyse the relationship between SII groups and the long‐term outcome. The primary outcomes were major cardiovascular events (MACE) which includes nonfatal myocardial infarction (MI), nonfatal stroke and cardiac death. Secondary outcomes included a composite of MACE and hospitalization for congestive heart failure.
Results
An optimal SII cut‐off point of 694.3 × 109 was identified for MACE in the CAD training cohort (n = 373) and then verified in the second larger CAD cohort (n = 5602). Univariate and multivariate analyses showed that a higher SII score (≥694.3) was independently associated with increased risk of developing cardiac death (HR: 2.02; 95% CI: 1.43‐2.86), nonfatal MI (HR: 1.42; 95% CI: 1.09‐1.85), nonfatal stroke (HR: 1.96; 95% CI: 1.28‐2.99), MACE (HR: 1.65; 95% CI: 1.36‐2.01) and total major events (HR: 1.53; 95% CI: 1.32‐1.77). In addition, the SII significantly improved risk stratification of MI, cardiac death, heart failure, MACE and total major events than conventional risk factors in CAD patients by the significant increase in the C‐index (P < .001) and reclassification risk categories by significant NRI (P < .05) and IDI (P < .05).
Conclusions
SII had a better prediction of major cardiovascular events than traditional risk factors in CAD patients after coronary intervention.
Summary
We conducted a systematic review of observational studies to examine the effects of body mass index (BMI) and obesity (BMI ≥ 30 kg/m2) on coronavirus disease 2019 (COVID‐19). Medline, Embase, ...and the Cochrane Library were searched. Sixteen articles were finally included in the meta‐analysis, and a random effects model was used. BMI was found to be higher in patients with severe disease than in those with mild or moderate disease (MD 1.6, 95% CI, 0.8–2.4; p = .0002) in China; however, the heterogeneity was high (I2 = 75%). Elevated BMI was associated with invasive mechanical ventilation (IMV) use (MD 4.1, 95% CI, 2.1–6.1; p < .0001) in Western countries, and this result was consistent across studies (I2 = 0%). Additionally, there were increased odds ratios of IMV use (OR 2.0, 95% CI, 1.4–2.9; p < .0001) and hospitalization (OR 1.4, 95% CI, 1.3–1.60; p < .00001) in patients with obesity. There was no substantial heterogeneity (I2 = 0%). In conclusion, obesity or high BMI increased the risk of hospitalization, severe disease and invasive mechanical ventilation in COVID‐19. Physicians must be alert to these early indicators to identify critical patients.
The annual range of precipitation, which is the difference between maximum and minimum precipitation within a year, is examined in climate model simulations under global warming. For global averages, ...the annual range of precipitation tends to increase as the globe warms. On a regional basis, this enhancement is found over most areas of the world, except for the bands along 30°S and 30°N. The enhancement in the annual range of precipitation is mainly associated with larger upward trends of maximum precipitation and smaller upward trends or downward trends of minimum precipitation. Based on the moisture budget analysis, the dominant mechanism is vertical moisture advection, both on a global average and on a regional scale. The vertical moisture advection, moisture convergence induced by vertical motion, includes the thermodynamic component, which is associated with increased water vapor, and the dynamic component, which is associated with changes in circulation. Generally, the thermodynamic component enhances the annual range of precipitation, while the dynamic component tends to reduce it. Evaporation has a positive contribution to both maximum and minimum precipitation, but very little to the annual range of precipitation. Even though evaporation and horizontal moisture advection are small for a global average, they could be important on a regional basis.
Celotno besedilo
Dostopno za:
BFBNIB, DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
Software process tailoring (SPT) is a team‐based and learning‐intensive activity that addresses the particular dynamic characteristics of a development project. Because SPT critically influences how ...projects are conducted, its performance should be investigated. However, the extant literature lacks empirical evidence on how the underlying effects of SPT performance and its team‐supportive factors operate and influence software project performance. From the knowledge perspective, this study adopts dynamic capabilities theory and considers the learning ability and absorptive capacity of software project teams to develop a theoretical model to address this gap. The results of an empirical examination of the model with 135 software project teams advance our understanding of how team‐level learning antecedents—experience, communication quality and trust—dynamically facilitate teams' absorptive capacity (AC) when they conduct SPT, which in turn reinforces project performance. The mediating effects of the proposed model are unveiled and discussed, and theoretical implications as well as practical guidance for how AC and these factors promote SPT and project performance are suggested.
The coronavirus disease 2019 (COVID-19) pandemic has led to accelerated efforts to develop therapeutics and vaccines. A key target of these efforts is the spike (S) protein, which is metastable and ...difficult to produce recombinantly. We characterized 100 structure-guided spike designs and identified 26 individual substitutions that increased protein yields and stability. Testing combinations of beneficial substitutions resulted in the identification of HexaPro, a variant with six beneficial proline substitutions exhibiting higher expression than its parental construct (by a factor of 10) as well as the ability to withstand heat stress, storage at room temperature, and three freeze-thaw cycles. A cryo-electron microscopy structure of HexaPro at a resolution of 3.2 angstroms confirmed that it retains the prefusion spike conformation. High-yield production of a stabilized prefusion spike protein will accelerate the development of vaccines and serological diagnostics for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2).
Translation of the unique properties of 2D monolayers from non‐scalable micron‐sized samples to macroscopic scale is a longstanding challenge obstructed by the substrate‐induced strains, interface ...nonuniformities, and sample‐to‐sample variations inherent to the scalable fabrication methods. So far, the most successful strategies to reduce strain in graphene are the reduction of the interface roughness and lattice mismatch by using hexagonal boron nitride (h‐BN), with the drawback of limited uniformity and applicability to other 2D monolayers, and liquid water, which is not compatible with electronic devices. This work demonstrates a new class of substrates based on hydrogels that overcome these limitations and excel h‐BN and water substrates at strain relaxation enabling superiorly uniform and reproducible centimeter‐sized sheets of unstrained monolayers. The ultimate strain relaxation and uniformity are rationalized by the extreme structural adaptability of the hydrogel surface owing to its high liquid content and low Young's modulus, and are universal to all 2D materials irrespective of their crystalline structure. Such platforms can be integrated into field effect transistors and demonstrate enhanced charge carrier mobilities in graphene. These results present a universal strategy for attaining uniform and strain‐free sheets of 2D materials and underline the opportunities enabled by interfacing them with soft matter.
Gels combine the structural adaptability of liquids with a finite Young's modulus of solids and interfacing them with monolayer 2D materials yields uniform, contamination,‐ and strain‐free sheets at large scale. Such platforms are device‐integratable and show improved electronic properties. The mechanisms of the observed strain relaxation are investigated by MD simulations and theoretical analysis.
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