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The purpose of this paper is to investigate the problem of optimizing geometrical and physical parameters of a stepped shell that maximize its rigidity and strength for given overall shell dimensions and fixed weight equal to the weight of a shell of constant thickness.

A mathematical model of the construction’s stress-strain state is described by solving a system of differential equations for each of the constituent parts of the shell, conjugation conditions on the division lines and boundary conditions. The stated optimization problem is reduced to a nonlinear programming problem, which is solved by the deformable polyhedron method in combination with the method of direct search and using the parallel computing package in the Wolfram Mathematica software application.

As follows from the results of the calculation, optimizing the shell parameters allows for a substantial increase in rigidity (decrease of the greatest deflection) and strength (increase of the load-carrying capacity) of the shell of constant stepwise thickness, as opposed to a shell of constant thickness, with constant weight and dimensions.

A problem of optimal design of a cylindrical composite panel of piecewise constant thickness is solved in the presented work. Numerical examples demonstrate that a substantial increase in rigidity and strength of a stepped composite shell can be achieved by the optimal choice of its geometrical and physical parameters.

This paper aims to inquire into the awareness of Vietnamese architects about design for safety (DfS) and the level of engagement in applying DfS among them to get a generic view of the implementation of DfS in Vietnam.

Quantitative research was used, in which a questionnaire was sent to Vietnamese architects to evaluate how they consider and apply DfS in the design process. Inferential and descriptive statistics then analysed the obtained data to identify the role of each factor.

The results from the survey conclude that Vietnamese architects have low engagement in applying DfS despite their high awareness and positive attitude towards DfS. Besides, the participants showed the need for further DfS education and training, which is lacking in Vietnamese formal education. In addition, the research also confirms that DfS education and training have positive impacts on the frequency of DfS implementation in Vietnam.

This research contributes to the knowledge of DfS implementation in developing countries. In line with this, further studies on the DfS concept in developing countries are needed to draw a more objective overview and give the solution for the low DfS appliance.

To the best of the authors’ knowledge, this is the first study inquiring into the implication of DfS in Vietnam, contributing to improving the lack of knowledge in this field in developing countries and Vietnam in particular.

The purpose of this paper was to reveal the possible changes in membrane physical parameters, such as surface charge, ξ-potential and molecular interactions of membrane components due to the in vitro and in vivo influences of ESF.

The in vitro and in vivo (one hour) influences of 200 kV/m external electrostatic field (ESF) on the erythrocyte membranes of white outbred rats were investigated by spectrofluorometric, spectral and electrophoretic methods.

It was shown that the in vivo influence of ESF leads to the intermolecular reconstructions and decrease of the positive charged groups in membrane surface layer. At the same time, the increases of the negative charged groups of membrane proteins after the field influence, is revealed. The charge redistribution in membranes due to the in vitro influence of ESF is observed.

The analysis of literature data and generalization of data obtained allow us concluding that in parallel with the polarization of lipid component of bilayer the changes in the structural state of membrane proteins take place due to the ESF influence on the erythrocyte membranes. These changes can be the reason and/or the result of the ESF induced redistribution of membrane charge.

Design for safety (DfS), also known as prevention through design (PtD), is a concept that mitigates accidents and hazards through considerations during the design stage of building projects. The literature provides much information on this concept, but such information is only limited to a few developed countries such as the UK, the USA and Australia. There is limited insight into DfS implementation in the construction industry of several countries, including countries in the Gulf Cooperation Council (GCC) such as Kuwait. Therefore, this study investigates DfS implementation among design professionals in the Kuwait construction industry.

The study used a questionnaire survey to obtain data from design professionals. The data were analysed using descriptive and inferential statistics (i.e. analysis of variance and t-test).

The results revealed that DfS awareness among design professionals is very high; there is a very high willingness among design professionals to apply the concept, and design professionals generally view DfS implementation as important. Despite these, the frequency of implementation of DfS practices is generally moderate. In addition, the results revealed that though there is a high interest in DfS training among the design professionals, their actual engagement in training is low. The results also suggest some association between the frequency of engagement in the DfS practices and designers' DfS awareness, training and education. DfS related regulations, industry guidance, formal education and training are considered by design professionals to have the greatest influence on DfS implementation in Kuwait.

These emerging findings both mirror and contradict aspects of the outcomes of previous DfS studies in other countries. Furthermore, the findings from this study provide insights into a less investigated area regarding work-related health and safety in the GCC region. It offers new and additional information and insights into the current state-of-the-art DfS implementation in the construction industry in Kuwait. In view of the findings, joined-up efforts by government, industry and academia are needed to enhance DfS implementation by design professionals in Kuwait.

This research aims to examine the practice of design for safety (DfS) in the construction industry of Saudi Arabia.

The study has adopted a mixed-method approach through the use of questionnaire surveys administered to professionals in architecture and engineering firms, as well as follow-up interviews with selected participants. The participants consisted of architects, structural engineers and electromechanical engineers. The study investigated dimensions related to knowledge and awareness, attitude toward DfS implementation and critical success factors for DfS implementation. These various dimensions have been assessed accordingly through the mean ratings in the relevant section of this paper. The thematic responses obtained from the follow-up interviews have been summarized and presented.

The findings from this study reveal a high level of awareness of DfS in Saudi Arabia. It also revealed that the most influential critical success factors are legislation and awareness of stakeholders, whereas the major barrier is the fear of cost overruns by the clients and their representatives.

The design stage of construction projects is crucial to enhancing the safety performance of projects through effective control of hazardous situations. The concept of DfS is, however, immature in many countries, such as Saudi Arabia, due to lack of awareness, enabling policies and other barriers. The value of this study is that it shows the current level of knowledge and practice of DfS in architecture and engineering firms in Saudi Arabia and consequently triggers the interest of stakeholders in its adoption and implementation.

The purpose of this paper is to investigate the in vitro influence of 200 kV/m electrostatic fields (ESF) on the microviscosity, viscosity and polarity of rat erythrocyte membranes for revealing the possible changes in lipid-protein interactions due to the field influence.

The investigation of the parameters of erythrocyte membranes and their ghosts, particularly, their microviscosity, the amount and immersion degree of membrane proteins in lipid bilayer, polarity in depth of membrane and its viscosity carried out by the spectrofluorimetric method using the hydrophobic fluorescent probe pyrene.

The carried out investigations shown that the in vitro influence of ESF changes membrane microviscosity, the quantity of membrane peripheral proteins and their immersion degree in the lipid bilayer, if the ghosts have prepared from erythrocytes previously exposed in the field. The analysis of the same parameters for previously prepared erythrocyte ghosts exposed to the 200 kV/m ESF during an hour did not reveal any changes.

Data obtained and their comparison with the results of the previous works allow authors to conclude that the in vitro influence of ESF leads to the changes in the lipid-protein interactions in erythrocyte membranes.

The purpose of this paper is to investigate the critical opportunities for design for safety (DFS), the potential statutory (and non-statutory) health and safety (H&S) responsibilities of designers including DFS and its workability in developing countries.

Interviews were conducted among 28 multi-designers including Architects, Civil Engineers and Builders and the data was analysed thematically.

The study revealed that the likelihood of designers, clients, etc. inclining to change because of the infancy stage of H&S in developing countries, making it “fallow” for H&S was a barrier. The opportunities for DFS include the willingness of designers to develop DFS skills and knowledge, which results in a welcoming attitude towards DFS. Further, the success recorded by professional bodies on other regulatory matters and designers' greater inclination to comply with DFS when professional bodies are involved in the regulatory process of DFS remain key opportunities for DFS.

For statutory-backed DFS to achieve the objective at the optimum level, the role of professional bodies in the regulatory and sensitisation processes, geographic differences in DFS legislation enforcement, nuanced and strategic design and enforcement of any legislation that will support DFS should be taken into consideration.

A grassroots collaborative approach to developing and implementing DFS in the country and the exploitation of the zeal of designers to have DFS-related knowledge, is recommended.

To the knowledge of the authors, this is the first study that examines the opportunities for DFS in developing countries when it is (or not) supported by statute and the need to advance the understanding of DFS in developing countries through qualitative enquiry.

Given the complexities in improving safety in the construction industry globally, which is exacerbated by the complex safety environment in developing countries (DCs), prevention through design (PtD) has been established to improve occupational safety and health (OSH) where applied. However, it has received very little attention in DCs and the extant literature with limitations. Using Nigeria as a case study, the current study advances the understanding of PtD in DCs by investigating the critical barriers to PtD and other potential OSH responsibilities of designers in the construction industry.

Twenty-eight semi-structured interviews and e-interviews of architects, builders and civil engineers in Nigeria were analysed using the six-phase thematic analysis. To improve the trustworthiness of the research, triangulation, peer-debriefing, refining the interview protocol and thick detailed description were done.

The study's findings question the extant general knowledge and understanding of PtD among clients and designers and its technical aspect among designers where it is skewed to structural safety and omitted in universities' curricula. This explains the inconclusive findings of existing studies on why there is a high level of awareness of PtD but a low level of implementation. There is little client support for PtD, and designers have limited influence on clients in terms of it. The fear of liability from PtD is exacerbated by the limited legal system and lack of adequate legislation in the country. The demotivating attitudes of clients and contractors towards designers in terms of PtD are also reported, just as there are project delivery barriers such as traditional procurement not supporting PtD as design and build procurement does.

For the sustainable growth in the practice of PtD, the increased and improved quality of education and awareness of PtD is needed but this must focus on instilling a robust understanding of it among designers based on the local context. This educational requirement can be supported by statute.

Through qualitative data, the findings explain and offer insight into the inconclusive findings in the extant studies on PtD in Nigeria. Also, it contributes to improving health and safety by advancing the understanding of the critical barriers to PtD and other potential OSH responsibilities of designers in D Nigeria's construction using qualitative data.

The uptake of Design for Safety (DfS) practices in developing countries like Ghana has been limited. This study aims to provide an in-depth understanding of the barriers across regulatory, organizational, cultural and educational dimensions that restrict DfS assimilation in the Ghanaian construction sector. Identifying the key impediments can inform policy initiatives and industry efforts to facilitate safer construction.

A postpositive philosophy underpinned the quantitative research. Multi-stage research was used. A comprehensive questionnaire survey was designed and given to six industry experts to assess clarity, relevance and effectiveness after a thorough literature review. In all, 164 professionals were reached to take part in the study using purposive sampling and consequently snowballing. “Variables” were ranked using mean score ranking and normalization techniques; exploratory factor analysis was then used to group variables into clusters.

Emergent findings revealed four distinct clusters of challenges; Design Process and Communication Challenges; Regulatory and Expertise Limitations; Planning and Education Constraints; and Attitudinal and Perception Barriers. These findings help identify targeted solutions to overcome barriers including developing robust regulatory frameworks, promoting collaboration among stakeholders and cultivating a positive safety culture.

This study provides new insights into the integration of DfS in the context of the developing construction industry in Ghana. This study expands the knowledge base to drive further research in enhancing construction safety in developing countries. Practical recommendations for overcoming these challenges are proposed.

Although building information modelling (BIM) adoption in developed countries has largely been incentivised by government, in developing countries, adoption is often driven by desires of industry professionals, which is dependent on awareness of BIM and availability of skills among the professionals. Thus, BIM awareness and competence among professionals have become useful baseline measures of BIM readiness. To ascertain BIM readiness within the Seychelles construction industry, this study aims to investigate the level of BIM awareness and level of BIM competence among construction professionals.

The study involved a questionnaire survey of construction professionals (n = 96) and data analysis using both descriptive statistics and association analysis.

The results indicate a moderate level of BIM awareness, but a low level of engagement in BIM education/training. Also, the professionals have very low BIM technical skills, notably the ability to use BIM-related tools and to perform BIM-related task. Furthermore, this study suggests that the experience of working on collaborative projects could be a useful premise for BIM implementation among construction professionals.

The implication is that construction professionals in the Seychelles need to start readying themselves for greater BIM adoption by taking steps to address the BIM technical skills deficiencies and the low engagement in BIM education/training.