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The purpose of this paper is to investigate the outlet of a special glass melting system, which is used to control melt flow and modify flow pattern.

Numerical calculations in ANSYS and ANSYS CFX were used to study electromagnetic, thermal, hydrodynamic and chemical mixing processes, results are validated by comparison with experimental data.

Obtained results show that investigated approach can improve glass melt chemical homogeneity significantly – Lorentz force driven melt movement in conjunction with diffusion process ensures good mixing quality.

The mixing in glass melt is present only in azimuthal direction (in cylindrical coordinate system associated with outlet tube axis) but the radial homogenization is determined by diffusion only.

The experiments in JSJ GmbH with soda lime glass were successful and showed mixing effect in output material, thus providing additional method for glass production.

Although the electrical conductivity of glass is very low, the melt motion is generated by EM forces in this equipment, thus this approach is innovative in glass production technology where typical motion source is buoyancy or mechanical mixing.

To develop the mathematical model, which allows predicting the temperature and flow distribution of an opaque glass melt with the temperature‐dependent properties in case it is generated by electromagnetic and thermal convection. Analysis has been done for geometry of the model crucible with the immersed rod electrodes. Numerical analysis is used as a tool for finding out the parameters of the system, which allow getting desiderated homogeneity of temperature field by EM action.

ANSYS CFX software is implemented for coupling of EM, thermal and HD processes in the modelled system. Usability of non‐inductive approximation is shown using a full harmonic analysis in ANSYS.

External magnetic field can impact the temperature distribution in the whole volume of the melt significantly, it relocates the hottest zones and changes the maximal temperature in the melt. Qualitative agreement between the numerical and experimental results has been obtained. Dependence of the potential difference between the electrodes on the velocity and temperature range has been examined. Impact of different thermal boundary conditions has been analysed.

Effects analysed in the publication occur in each conducting media subjected to the impact of simultaneous electrical and magnetical field. The main limitation is non‐transparency of the melt.

The purpose is to develop a mathematical tool for parameter optimisation of real glass melting furnace.

In the present model temperature dependent properties of the melt have been taken into account, which has been neglected in previous models.

During the COVID-19 pandemic, working from home (WFH) has become the norm for many employees and their families in Germany. Although WFH has been suggested as a form of flexible work to foster work–life integration (especially for workers with greater care responsibilities), studies have also pointed to its risks when the boundaries between these two life spheres become blurred. To help disentangle these inconsistent findings in relation to work–family conflict, this study focuses on two main concerns: the relevance of additional forms of flexibility for those who work from home (i.e., temporal flexibility, job autonomy, fixed rules about availability) and the implications of WFH for employees’ social relationships with co-workers and supervisors. Based on linked employer–employee data collected in the spring of 2021, the study examined work-to-family conflict (WFC) and family-to-work conflict (FWC) among a sample of 885 employees who worked from home. The results indicate that three factors – temporal flexibility, job autonomy, and fixed rules about availability as a way to set boundaries between work and family life – are important predictors of fewer work–family conflict. This equally applies to employees with caring obligations who overall experience more work–family conflicts while WFH. For those who cared for relatives, autonomy contributed even to fewer work–family conflicts. Supportive relationships with supervisors and co-workers are certainly directly beneficial when it comes to avoiding conflict, but they also reinforce the positive implications of flexible work, whereas poor relationships counteract the benefits of such flexibility. Thus, employers need to provide additional forms of flexibility to employees who work from home and should pay attention to social relationships among their employees as a way to support families and other individuals.

This study analyzes the effects of gender and occupational status differences on parents’ work-to-family conflicts, comparing COVID-19 pandemic and pre-pandemic periods. It is examined whether this association is mediated by parents’ telework. Theoretically, we use the work/family border theory and flexible resource versus greedy role perspectives to shed light on the gender- and status-related use of telework and illustrate the influence of flexible working practices on parents’ work-to-family conflicts. Using moderated mediation analysis combined with bootstrapping, we analyze data from two waves of the German Family Panel (pairfam), covering pre-pandemic (2017/18, 2019/2020) and pandemic periods (2020) (N = 3,315). Our results show higher work-to-family conflicts for parents with higher occupational status as well as teleworking parents. Furthermore, we find supporting evidence for the mediation from occupational status to work-to-family conflicts via telework, with a slightly stronger relationship among mothers than fathers. Under the consideration of the pandemic, the mediating effect was only provable for mothers but not for fathers. However, the mediating effect of telework does not strengthen under the pandemic conditions. Our findings support the greedy role perspective, in particular for employees with higher-status occupations, and the assumption of a negative influence of work–family integration through telework for work-to-family conflicts.

This study aims to better understand the morphological characteristics of single particle and the health risk characteristics of heavy metals in PM_2.5 in different functional areas of Handan City.

High resolution transmission electron microscopy was used to observe the aerosol samples collected from different functional areas of Handan City. The morphology and size distribution of the particles collected on hazy and clear days were compared. The health risk evaluation model was applied to evaluate the hazardous effects of particles on human health in different functional areas on hazy days.

The results show that the particulate matter in different functional areas is dominated by spherical particles in different weather conditions. In particular, the proportion of spherical particles exceeds 70% on the haze day, and the percentage of soot aggregates increases significantly on the clear day. The percentage of each type of particle in the teaching and living areas varied less under different weather conditions. Except for the industrial area, the size distribution of each type of particle in haze samples is larger than that on the clear day. Spherical particles contribute more to the small particle size segment. Soot aggregate and other shaped particles contribute more to the large size segment. The mass concentrations of hazardous elements (HEs) in PM_2.5 in different functional areas on consecutive haze pollution days were illustrated as industrial area > traffic area > living area > teaching area. Compared with the other functional areas, the teaching area had the lowest noncarcinogenic risk of HEs. The lifetime carcinogenic risk values of Cr and As elements in each functional area have exceeded residents’ threshold levels and are at high risk of carcinogenicity. Among the four functional areas, the industrial area has the highest carcinogenic and noncarcinogenic risks. But the effects of HEs on human health in the other functional areas should also be taken seriously and continuously controlled.

The significance of the study is to further understand the morphological characteristics of single particles and the health risks of heavy metals in different functional areas of Handan City. the authors hope to provide a reference for other coal-burning industrial cities to develop plans to improve air quality and human respiratory health.

The outbreak of COVID-19 not only had serious negative impacts on the world economy but also on the global mental health because of the psychological disorders associated with the spread of the pandemic, the increased degree of uncertainty and the unprecedented measures taken by different countries to face the pandemic’s spread. This paper analyses the mental health well-being of individuals in selected MENA countries (Jordan, Morocco, Tunisia and Egypt) during the pandemic.

The study employs a pooled OLS model using the Economic Research Forum (ERF) COVID-19 MENA Monitor Survey panel dataset collected during 2020 and 2021.

The findings show that there is no association between the mental health of individuals in the selected countries and their age, gender, family size, marital status, receipt of social support and participation in care work. Mental health improved at higher levels of education, being employed, being a rural area resident and living in Morocco or Tunisia compared to living in Jordan while it worsened as income declined, food insecurity and anxiety about being infected with Covid-19 increased, being a resident in camps, and during waves 4 and 5. Based on these results, it is recommended that suitable financial, physical and human resources should be directed towards the provision of mental health care services in the region. Also, mental health care services should be accessible to different population groups, with a special focus towards the most vulnerable since they are more prone to mental illnesses, especially during health crises and economic shocks. This should be accompanied by increasing awareness about the provided services and reducing stigma against mental illnesses. Furthermore, introduction of policies targeted towards reducing food insecurity and income instability can play a key role in enhancing mental well-being.

Although few papers have previously investigated the impact of COVID-19 on mental health in MENA countries, most of them have focused on a country-level analysis and adopted a gender perspective. Hence, this paper aims at exploring the association between mental health well-being and socio-economic factors in selected MENA countries during the pandemic.

The paper aims to optimize calcium difluoride electrical melting process towards creating titanium production with improved morphology by combining titanium reduction and electroslag melting processes. The study aims to explore optimal electrical heating power in the slag supplied via tungsten electrode and formation of a stable skull layer on water-cooled walls of a cylindrical stainless steel reactor, which is crucial for electroslag melting.

The multi-physical numerical modelling approach using commercial software COMSOL Multiphysics is presented in the paper by coupling electrical, heat transfer and fluid flow problems. The slag material phase change and corresponding changes of physical properties such as electrical conductivity and viscosity are modelled by step function, sharply changing value of parameter near the phase change temperature. A parametric study of applied electrical power has been carried out to find optimal conditions for the skull-layer formation.

The paper provides an estimation of necessary electrical power to avoid overheating or solidification of the top layer of slag, which is unacceptable for the combined Kroll process. The study also revealed important poloidal buoyancy flow with characteristic velocity of few cm/s of in the reactor, which governs the heat transfer process and formation of the skull layer.

The presented simplification in numerical model offers high calculation speed but lacks fully developed phase change model, e.g. excluding latent heat. Also, heat transfer through radiation is neglected in the model.

The paper presents an original way to overcome the complexity of modelling slag electrical melting/solidification phenomena using temperature-dependent properties with step functions.

This study aims to investigate the impact of working from home and its duration on job satisfaction.

The analysis was conducted on a representative panel data set from the Russian Longitudinal Monitoring Survey - Higher School of Economics (RLMS-HSE) for 2016–2021 using endogenous regression models. The impact of working from home on job satisfaction before and during the coronavirus disease 2019 (COVID-19) pandemic, and separately for men and women, was analysed.

Working from home was found to positively affect job satisfaction in the Russian labour market. From 2016 to 2021, men and women who worked from home were more satisfied with their jobs than their counterparts who did not work from home. The positive impact of working from home on job satisfaction was observed before and during the COVID-19 pandemic. However, remote workers (RWR) putting in more than eight hours per day reported lower job satisfaction.

Working from home can be considered as a measure to combat unemployment, increase employment and improve the utilisation (distribution) of human resources. Further research is required to analyse the impact of health issues and the need to care for young children or infirm persons on job satisfaction in remote work. A more detailed analysis is required of the factors that affect the job satisfaction of women who work remotely.

To ensure that labour productivity increases and not decreases, employers are advised to develop more detailed working arrangements and labour management for RWRs. Especially for such assigned workers, task control regulations must be developed. To increase the motivation of individuals to work remotely, overtime should be paid at a higher rate.

Unclear working time regulations lead to overwork, irregular working hours and burnout. For RWRs, this leads to lower job satisfaction and a consequent drop in productivity.

The empirical investigation is based on a representative panel of Russian data with six waves. Wide ranges of job characteristics were incorporated as determinants. The problem of causality was investigated. For models with an endogenous regressor, instrumental variables were tested and selected.

The article addresses the tension between Corporate Social Responsibility (CSR) and the right to work in times of the COVID-19 pandemic. Accordingly, it explores the operation of corporations in adopting policies of mandatory vaccination and the role of the courts regarding these CSR patterns.

The article examines court case studies of CSR practices regarding unvaccinated employees during the COVID-19 pandemic in Israel and the United States.

The findings show that the Israeli system adopted the regulating for individual discretionary CSR approach, whereas the American system adopted the regulating for ethical-public CSR approach. Adopting the latter infringes upon the right to work of unvaccinated employees. While in Israel, the possibility of compelling employees to vaccinate is denied, in the American model, mandatory vaccination is possible. As opposed to the American model, in the Israeli model, there is an obligation to consider proportionate measures to isolate the employees while allowing them to continue working.

The article introduces two possible notions of regulating CSR in times of the pandemic – regulating for individual discretionary CSR which is labor-oriented and regulating for ethical-public CSR which is focused on public aspects. While the former posits that corporations should advance individual interests of employees and their right to work, the latter claims that corporations should advance the public interest in health. Following the problems resulting from the Israeli and American cases, the article draws on the lines for a suggested approach that courts should embrace.