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2021 ◽  
Vol 2021 (2) ◽  
pp. 52-57
Author(s):  
Uliana Marushchak ◽  
◽  
Myroslav Sanytsky ◽  
Nazar Sydor ◽  
Ihor Margal ◽  
...  

The development of high-performance materials, which are characterized by high compressive and flexural strength, durability and performance properties, is an urgent problem of modern construction. Engineered cementitious composites are one such material. Improving of properties of composites is achieved by partial replacement of cement with supplementary cementitious materials. The ratio of binder and filler components and superplasticizer consumption were selected. The optimal ratio of cement:fly ash:sand is 1:1:1 and the dosage of polycarboxylate superplasticizer is 0.75% by weight of the binder. The reduction of the negative impact of the increased amount of fly ash, which is characterized by low reactivity, is provided by the introduction of metakaolin and alkaline hardening activator. Alkaline activated cement system is characterized by increasing of the early strength in 1.5 times comparison with equivalent mixture without alkaline activator. Strength of alkaline activated cementing matrix after 28 days is 66.1 MPa and specific strength Rc2/Rc28 is 0.61.


2021 ◽  
Vol 29 (12) ◽  
pp. 683-691
Author(s):  
Jean Doherty ◽  
Mary Brosnan ◽  
Lucille Sheehy

Background There has been a shift in maternity care over the past decade. The changes encountered by postnatal ward staff and the impact of these changes on women postnatally requires exploration. This study aimed to ascertain midwives' and healthcare assistants' perspectives of the changes in postnatal care and challenges to providing care in the current context. Methods This was a qualitative study involving two focus groups of 15 midwives and healthcare assistants from an Irish urban maternity hospital. The participants' responses were analysed thematically. Results Changes in women's clinical characteristics, including increased comorbidities and caesarean section rates, were highlighted as creating additional care needs. Furthermore, additional midwifery tasks and clinical protocols as well as shorter hospital stays leave little time for high-quality, woman-centred care. Participants highlighted a negative impact on maternal health from limited follow-up midwifery care in the community. Conclusions With additional midwifery duties and a reduction in time to complete them, additional community midwifery care is key to providing high-quality follow-on care after postnatal discharge from hospital.


2021 ◽  
Vol 12 ◽  
Author(s):  
Kai Wang ◽  
Kejun Lin ◽  
Shixin Yang ◽  
Sang-Gyun Na

In the age of digitalization, social media has played a significant role in quickly spreading the news about current affairs. From December 2019 to now, coronavirus disease 2019 (COVID-19), with its several mutated shapes, has more transmissible potential catastrophe and has become a severe phenomenon issue worldwide. The international spread of the epidemic has created fear among people, especially employees working physically in different organizations. The present research aimed to measure the impact of social media on its users in the China. The social media users more often were influenced by shocking news instructively and destructively. The research analysis was based on service sector employees and data collected from 630 respondents via a structured questionnaire. This research was confirmed the negative impact of fear on social media on the performance of employees. This research was also confirmed the moderation impact of the COVID-19 vaccine on the relationship between social media fear and employee performance. This research recommends that the China Censor Board checked the news and its validity to reduce the fear of COVID-19 among employees. This research will become a roadmap for organizations and media controllers to understand the impact of social media during an intense situation. The telecommunication sector will reduce psychological disease and enhance the work capability of employees by controlling unnecessary and unapproved material about sensitive issues.


Author(s):  
Chenli Yin ◽  
Dan Li ◽  
Maria Paz Salmador

AbstractThe existing corporate governance literature has mostly focused on micro-level studies of executive compensation, with limited attention paid to influential macro-level factors such as institutions and institutional changes and their impacts on corporate governance and performance. The implementation of the new compensation policy that restricts CEO compensation ceiling in state-owned firms in China offers an ideal context for us to study how institutional changes and firms’ adoption of these changes can influence CEO turnover and firm performance. Our empirical analyses reveal that the positive impact of new compensation policy adoption on CEO turnover is stronger for CEOs with originally higher compensation. The impact of new compensation policy adoption on firm performance, however, is negative, and the negative impact is contingent upon a firm’s market share and tech intensity. Our research contributes to the literature on corporate governance by theorizing and empirically demonstrating the critical role that institutions play in corporate governance.


2021 ◽  
Vol 4 (4) ◽  
Author(s):  
Novia Hepriani Pane ◽  
Zaili Rusli

The circulation of screen printing Ulos and the Covid 19 pandemic caused a negative impact on Ulos SMEs in Tarutung District which could threaten the sustainability of small industrial businesses. The strategic importance is right in accordance with Ulos and its ancestral values by the Small and Medium Enterprises Cooperative Trade Office and the North Tapanuli Dekranasda. The purpose of this research is to see how the Ulos development strategy through SMEs is carried out by the Small and Medium Enterprises Cooperative Trade Office of North Tapanuli Regency and what factors influence the Ulos development strategy. The research method used is a qualitative approach with descriptive data, followed by a strategy formulation using the SWOT analysis method. Based on research and discussion, it was found that the Ulos Development Strategy through SMEs in Tarutung District, North Tapanuli Regency had not been implemented optimally, this was influenced by limited capital and the less than optimal role of the government.


2021 ◽  
pp. 232102222110596
Author(s):  
Toritseju Begho ◽  
Omotuyole I. Ambali

Farmers regularly make intertemporal decisions under risk or uncertainty. To improve how farmers behave when faced with decisions that have financial consequences, there is a need for a deeper understanding of farmers’ risk and time preferences. While the relationship between individual components of affect and risk preferences is well documented, the same cannot be said for holistic measures of affect on one hand, and for affect and time preferences on the other hand. The data analysed in this paper is the 2014–2015 Indonesian Family Life Survey Wave 5. The survey included experimental measures designed to elicit both risk and time preferences from the same subjects. We analysed the data using limited dependent variable regression models. Our findings strengthen what is known about the affect infusion model. With increased pleasant affect, farmers’ willingness to take risks increases significantly. The results also suggest that pleasant affect is associated with increased odds that farmers will choose future rewards in the long horizon but had no statistically significant effect on the short horizon. The practical implications are that an experience of pleasant affect before decision-making may cause the decision-maker (DM) to perceive a prospect as having high benefits and low risks. Pleasant affect may also induce lower sensitivity towards losses and play the role of a buffer which reduces the immediate negative impact of information that otherwise would prevent the DM from focusing on the long-term. JEL Classifications: C93, D81, D91


2021 ◽  
pp. 000313482110586
Author(s):  
Anastasios T. Mitsakos ◽  
Eftechios Xanthoudakis ◽  
William Irish ◽  
Walter C. Robey ◽  
Rebecca M. Gilbird ◽  
...  

Background Despite advances in online education during the COVID-19 pandemic, its impact on surgical simulation remains unclear. The aim of this study was to compare the costs and resources required to maintain simulation training in the pandemic and to evaluate how it affected exposure of medical students to simulation during their surgical clerkship. Methods The number of learners, contact hours, staff hours, and costs were collected from a multi-departmental simulation center of a single academic institution in a retrospective fashion. Utilization and expenditure metrics were compared between the first quarter of academic years 2018-2020. Statistical analysis was performed to evaluate potential differences between overall resource utilization before and during the pandemic, and subgroup analysis was performed for the resources required for the training of the third-year medical students. Results The overall number of learners and contact hours decreased during the first quarter of the academic year 2020 in comparison with 2019 and 2018. However, the staff hours increased. In addition, the costs for PPE increased for the same periods of time. In the subgroup analysis of the third-year medical students, there was an increase in the number of learners, as well as in the staff hours and in the space required to perform the simulation training. Discussion Despite an increase in costs and resources spent on surgical simulation during the pandemic, the utilization by academic entities has remained unaffected. Further studies are required to identify potential solutions to lower simulation resources without a negative impact on the quality of surgical simulation.


2021 ◽  
Vol 1 ◽  
pp. 145
Author(s):  
Laura Gervais ◽  
Pierick Mouginot ◽  
Anais Gibert ◽  
Oceane Salles ◽  
Mathieu Latutrie ◽  
...  

Background: In contrast with historical knowledge, a recent view posits that a non-negligible proportion of populations might respond positively to habitat fragmentation. Populations might thrive in a fragmented landscape if functional connectivity, i.e., the net flow of individuals or their genes moving among suitable habitat patches, is not restricted. Alternatively, functional connectivity might be typically limited but enhanced by a higher reproductive success of migrants. Methods: We tested for this hypothesis in wild snapdragon plants inhabiting six patches separated by seawater in a fragmented Mediterranean scrubland landscape. We reconstructed their pedigree by using a parentage assignment method based on microsatellite genetic markers. We then estimated functional connectivity and the reproductive success of plants resulting from between-patch dispersal events. Results: We found that wild snapdragon plants thrived in this fragmented landscape, although functional connectivity between habitat patches was weak (i.e. 2.9%). The progeny resulting from between-patch dispersal events had a higher reproductive success than residents. Conclusion: Our findings expose a remarkable aspect of fragmented landscapes, where weak functional connectivity was enhanced by higher reproductive success after migration. This process might have the potential to compensate at least partly the negative impact of fragmentation.


2021 ◽  
Vol 8 (2) ◽  
pp. 1--7
Author(s):  
Liana Chernobay ◽  
◽  
Altyn Yessirkepova ◽  
Sviatoslav Malibroda ◽  
◽  
...  

This paper provides a theoretical framework for estimating the labor migration impact on the economy of sending country. The overall emigration impact includes two effects, which can be calculated separately, i.e., a departure effect and a remittances effect. The departure effect causes a negative impact on the economy by decreasing autonomous consumption. The remittances effect causes a positive impact by increasing disposable income and thus internal consumption and savings and imports. Calculations include the multiplier effect. The labor emigration impact on GDP is calculated as a difference between a positive remittances effect and a negative departure effect. The analysis is conducted for countries that are not at full employment.


2021 ◽  
Vol 46 ◽  
pp. S640
Author(s):  
M. Theilla ◽  
H. Ben Tovim ◽  
I. Kagan ◽  
M. Helerman ◽  
L. Stadtlander ◽  
...  

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