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Article
Publication date: 31 May 2022

Samridhi Garg, Monica Puri Sikka and Vinay Kumar Midha

Perspiration and heat are produced by the body and must be eliminated to maintain a stable body temperature. Sweat, heat and air must pass through the fabric to be comfortable…

Abstract

Purpose

Perspiration and heat are produced by the body and must be eliminated to maintain a stable body temperature. Sweat, heat and air must pass through the fabric to be comfortable. The cloth absorbs sweat and then releases it, allowing the body to chill down. By capillary action, moisture is driven away from fabric pores or sucked out of yarns. Convectional air movement improves sweat drainage, which may aid in body temperature reduction. Clothing reduces the skin's ability to transport heat and moisture to the outside. Excessive moisture makes clothing stick to the skin, whereas excessive heat induces heat stress, making the user uncomfortable. Wet heat loss is significantly more difficult to understand than dry heat loss. The purpose of this study is to provided a good compilation of complete information on wet thermal comfort of textile and technological elements to be consider while constructing protective apparel.

Design/methodology/approach

This paper aims to critically review studies on the thermal comfort of textiles in wet conditions and assess the results to guide future research.

Findings

Several recent studies focused on wet textiles' impact on comfort. Moisture reduces the fabric's thermal insulation value while also altering its moisture characteristics. Moisture and heat conductivity were linked. Sweat and other factors impact fabric comfort. So, while evaluating a fabric's comfort, consider both external and inside moisture.

Originality/value

The systematic literature review in this research focuses on wet thermal comfort and technological elements to consider while constructing protective apparel.

Details

Research Journal of Textile and Apparel, vol. 28 no. 2
Type: Research Article
ISSN: 1560-6074

Keywords

Article
Publication date: 4 April 2023

Chinedu Chinakwe, Adekunle Adelaja, Michael Akinseloyin and Olabode Thomas Olakoyejo

Inclination angle has been reported to have an enhancing effect on the thermal-hydraulic characteristics and entropy of some thermal systems. Therefore, this paper aims to…

Abstract

Purpose

Inclination angle has been reported to have an enhancing effect on the thermal-hydraulic characteristics and entropy of some thermal systems. Therefore, this paper aims to numerically investigate the effects of inclination angle, volume concentration and Reynolds number on the thermal and hydraulic characteristics and entropy generation rates of water-based Al2O3 nanofluids through a smooth circular aluminum pipe in a turbulent flow.

Design/methodology/approach

A constant heat flux of 2,000 Watts is applied to the circular surface of the tube. Reynolds number is varied between 4,000 and 20,000 for different volume concentrations of alumina nanoparticles of 0.5%, 1.0% and 2.0% for tube inclination angles of ±90o, ±60o, ±45o, ±30o and 0o, respectively. The simulation is performed in an ANSYS Fluent environment using the realizable kinetic energy–epsilon turbulent model.

Findings

Results show that +45o tube orientation possesses the largest thermal deviations of 0.006% for 0.5% and 1.0% vol. concentrations for Reynolds numbers 4,000 and 12,000. −45o gives a maximum pressure deviation of −0.06% for the same condition. The heat transfer coefficient and pressure drop give maximum deviations of −0.35% and −0.39%, respectively, for 2.0% vol. concentration for Reynolds number of 20,000 and angle ±90o. A 95%–99.8% and 95%–98% increase in the heat transfer and total entropy generation rates, respectively, is observed for 2.0% volume concentration as tube orientation changes from the horizontal position upward or downward.

Originality/value

Research investigating the effect of inclination angle on thermal-hydraulic performance and entropy generation rates in-tube turbulent flow of nanofluid is very scarce in the literature.

Details

World Journal of Engineering, vol. 21 no. 3
Type: Research Article
ISSN: 1708-5284

Keywords

Article
Publication date: 3 May 2023

Sahem Nawafleh

Based on the principle of equality, individuals with disabilities have the right to equal job opportunities and career advancements and to actively participate in the economy like…

Abstract

Purpose

Based on the principle of equality, individuals with disabilities have the right to equal job opportunities and career advancements and to actively participate in the economy like other members of society. This study aims to provide an integrated description of discriminatory occupational practices and behaviours that individuals with disabilities face. This study followed the descriptive analytical approach to achieve the objectives. A questionnaire was used for data collection purposes.

Design/methodology/approach

The target population for this study was male and female employees with disabilities working in the Jordanian Government sector for the years 2019–2022 in all governorates of Jordan. The sample method used was purposive-convenient random sampling, and the size of the sample valid for statistical analysis was n = 1,043. Using the Statistical Package for Social Sciences (v26), a number of statistical tests were conducted to infer the features of the researched phenomenon.

Findings

This study found an overall moderate level (mean = 2.76) of practices and behaviours of job discrimination against individuals with disabilities in the Jordanian public sector. All proposed practices and behaviours were at moderate levels of agreement, with the highest discriminatory behaviours being in the areas of training and learning opportunities (2.88), followed by job performance evaluation (2.84), work leave and vacation (2.75), integration and social participation (2.74), career advancement and promotion (2.73) and, last, the distribution of tasks and responsibilities (2.61). Furthermore, it was found that there are significant differences in the levels of discriminatory practices and behaviours towards people with physical disabilities, individuals with visual impairments and psychological disabilities, new employees at work and those with a low level of education. In addition, employees at higher administrative levels (manager, deputy/assistant manager and head of department/division) and workers in the southern and central governorates are exposed to the highest levels of discrimination.

Research limitations/implications

Lack of data: There is often a lack of reliable and comprehensive data on employees with disabilities, making it difficult for researchers to accurately study and understand the experiences of this population. Stigma and discrimination: People with disabilities often face stigma and discrimination, which can make it challenging for researchers to engage with them and collect accurate information.

Practical implications

Moreover, it was found that the main agencies to which cases of discriminatory practices towards individuals with disabilities working in the Jordanian public sector are reported are the direct managers/supervisors (n = 381), the ministry to which the institution/department belongs (n = 278) and the Higher Council for the Rights of Persons with Disabilities (n = 261).

Social implications

Supporting social inclusion: Employment can provide a sense of purpose, identity and social inclusion for people with disabilities, which can have a positive impact on their disabilities and overall quality of life. Improving diversity and inclusion: The inclusion of employees with disabilities can contribute to a more diverse and inclusive workplace, where all employees feel valued and respected.

Originality/value

This study found that discriminatory practices against employees with disabilities in the Jordanian public sector were largely because of a lack of awareness of reporting mechanisms and negative attitudes towards individuals with disabilities. This study proposes solutions such as raising awareness among non-disabled employees, implementing penalties for discriminatory behaviour and updating legislation for the rights of individuals with disabilities.

Details

International Journal of Organizational Analysis, vol. 32 no. 4
Type: Research Article
ISSN: 1934-8835

Keywords

Article
Publication date: 13 April 2022

Lina Nageb Fewella

The paper aims to describe the positive and negative effects of night lights in historical sites, as well as the most salient challenges faced by the visitors of these sites and…

324

Abstract

Purpose

The paper aims to describe the positive and negative effects of night lights in historical sites, as well as the most salient challenges faced by the visitors of these sites and determine ways to address them. The study aims to suggest several light-and-shadow approaches and designs to enhance the experience of visiting historical sites.

Design/methodology/approach

This study identifies problems of nightlife in historical sites with an online international questionnaire to determine the preferences and difficulties faced by visitors of historical sites during day and night. After that Egypt was determined as a sample case of a developing country; its archaeological sites need to be improved. The main problems of historical Egyptian sites were investigated and approaches in developing historical sites with interactive lighting design were presented after an online questionnaire to the Egyptian society.

Findings

The paper shows that archaeological sites need some development, especially in their technological and lighting aspects, to overcome visitors’ low night-time interest in archaeological sites. Research has found certain limitations in the effects of constructing artificial illumination. The study provides modern sustainable solution for some light challenges in historical sites with approaches and solutions to solve it.

Research limitations/implications

The results of that research could be applied in developing countries, but with larger specific studies to the historical urban locations according to the politics of the country.

Practical implications

The paper includes sustainable approaches in developing historical sites with technological lighting design required to enhance historical sites at night-time and make visits more interactive and interesting.

Originality/value

This paper presents an identified need of historical sites visitors’ to study applying modern approaches in enhancing urban historical sites.

Details

Journal of Cultural Heritage Management and Sustainable Development, vol. 14 no. 3
Type: Research Article
ISSN: 2044-1266

Keywords

Article
Publication date: 22 April 2024

Ghada Karaki, Rami A. Hawileh and M.Z. Naser

This study examines the effect of temperature-dependent material models for normal-strength (NSC) and high-strength concrete (HSC) on the thermal analysis of reinforced concrete…

Abstract

Purpose

This study examines the effect of temperature-dependent material models for normal-strength (NSC) and high-strength concrete (HSC) on the thermal analysis of reinforced concrete (RC) walls.

Design/methodology/approach

The study performs an one-at-a-time (OAT) sensitivity analysis to assess the impact of variables defining the constitutive and parametric fire models on the wall's thermal response. Moreover, it extends the sensitivity analysis to a variance-based analysis to assess the effect of constitutive model type, fire model type and constitutive model uncertainty on the RC wall's thermal response variance. The study determines the wall’s thermal behaviour reliability considering the different constitutive models and their uncertainty.

Findings

It is found that the impact of the variability in concrete’s conductivity is determined by its temperature-dependent model, which differs for NSC and HSC. Therefore, more testing and improving material modelling are needed. Furthermore, the heating rate of the fire scenario is the dominant factor in deciding fire-resistance performance because it is a causal factor for spalling in HSC walls. And finally the reliability of wall's performance decreased sharply for HSC walls due to the expected spalling of the concrete and loss of cross-section integrity.

Originality/value

Limited studies in the current open literature quantified the impact of constitutive models on the behaviour of RC walls. No studies have examined the effect of material models' uncertainty on wall’s response reliability under fire. Furthermore, the study's results contribute to the ongoing attempts to shape performance-based structural fire engineering.

Details

Journal of Structural Fire Engineering, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2040-2317

Keywords

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