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The purpose of this paper is to investigate the quality of the frying oil used in restaurants, fast food establishments, and confectionary stores. The compliance of used frying oils with the quality standards as determined by the peroxide value (PV) and the total polar materials (TPMs) is investigated by analyzing 375 samples of oil.

The PV was measured according to the national standard procedure number 4179, while the TPM was determined using a Testo 270 cooking oil tester. Frying oils with a PV>5 mEq/kg and a TPM>25 percent were considered to be non-edible. For a comparison of groups, the Mann-Whitney and Spearman correlation tests were used, and p<0.05 was considered significant.

The maximum TPM and PV recorded for frying oils in fast food restaurants were 97.5 percent and 77.9 mEq/kg, respectively. The results also revealed that 60 percent of samples were non-edible according to the TPM, while 58.9 percent of the oil samples were non-edible because of the PV. TPM and PV correlated well with each other (r=0.99, p<0.001) and with oil replacement intervals (r=0.90, p<0.001). The relationship between the TPM and PV was stronger in the polynomial model than the linear model. The following equation was obtained: peroxide (mEq/kg oil)=0.0043 TPM2 (%)+0.1587 TPM (%)–0.6152.

Considering the current limitations in official supervision by health authority, on-site self-monitoring of the TPM using the Testo 270 cooking oil tester by sellers as a solution seems a new approach. Food stores, restaurants, and confectionary stores should be equipped with TPM analyzers to determine the quality of the frying oil and the timely replacement of non-edible oils.

This study aims to investigate the irreversibility associated with the Fe3O4–Co/kerosene hybrid-nanofluid past a wedge with nonlinear radiation and heat source.

This study reports the numerical analysis of the hybrid nanofluid model under the implications of the heat source and magnetic field over a static and moving wedge with slips. The second law of thermodynamics is applied with nonlinear thermal radiation. The system that comprises differential equations of partial derivatives is remodeled into the system of differential equations via similarity transformations and then solved through the Runge–Kutta–Fehlberg with shooting technique. The physical parameters, which emerges from the derived system, are discussed in graphical formats. Excellent proficiency in the numerical process is analyzed by comparing the results with available literature in limiting scenarios.

The significant outcomes of the current investigation are that the velocity field uplifts for higher velocity slip and magnetic strength. Further, the heat transfer rate is reduced with the incremental values of the Eckert number, while it uplifts with thermal slip and radiation parameters. An increase in Brinkmann’s number uplifts the entropy generation rate, while that peters out the Bejan number. The results of this study are of importance involving in the assessment of the effect of some important design parameters on heat transfer and, consequently, on the optimization of industrial processes.

This study is original work that reports the hybrid nanofluid model of Fe3O4–Co/kerosene.

The purpose of this paper is twofold: first, to document that employees’ use of social networks (SNs) does not necessarily bring negative consequences and can indirectly benefit organizations and second, to compare the roles of public SNs and enterprise social networks (ESNs) in bringing benefits to organizations. Consequently, this study, on the basis of stimulus‒organism‒response theory, directly investigated and compared the roles of public SNs and ESNs in promoting employees’ organizational commitment from affective, normative, and continuance dimensions with regard to the mediating role of job satisfaction.

For this purpose, 240 employees of Asia-Tech Company, one of the high-speed internet service providers in Iran, who had joined Skype for Business ESN, were included in this study. Partial least squares (PLS) method was used to examine the validity of the measurement and structural models. To this end, Warp-PLS software (version 5.0) was employed.

The results of the study suggested that public SNs have a positive impact on affective and normative commitment; however, no significant impact was observed for continuance commitment. ESNs directly affect none of the dimensions of organizational commitment. Although both types of SNs have impacts on job satisfaction, the greater impact was found for the public SNs. Job satisfaction also has a positive effect on all three dimensions of organizational commitment.

To the best of authors’ knowledge, no study has directly investigated and compared the roles of ESNs and public SNs in promoting organizational commitment from affective, continuance and normative dimensions with regard to the mediating role of job satisfaction. The most important theoretical contribution of the present research was to document that the employees’ use of SNs does not necessarily entail the waste of resources and has various advantages, such as strengthening organizational commitment (in affective, normative and continuance dimensions) and job satisfaction. In fact, this study disclosed the bright side of SNs in the workplace.

The purpose of this paper is to examine how the spiritual leadership (SL) of the leader is perceived by workers in the public health sector in the Assiut region of Egypt. In other words, this study investigates the work-related workplace spirituality (WPS) of public health workers in this context.

An online survey was conducted among a sample of 333 employees working in the public health sector in Assiut.

The empirical results indicate that the SL of the leader (especially altruism and vision), as evaluated by employees, positively influence work-related WPS. The results confirm that strengthening SL is a promising pathway to improve WPS, which may ultimately have some benefits, such as helping to improve individual and institutional performance in the public health sector.

The authors hope that the theoretical insights gained through the findings of this study will encourage researchers to explore how and when to enhance SL and WPS for employees.

This study, based on the cognitive dissonance and commitment theories, aims to show that employees with high organizational commitment take more advantage of enterprise social networks (ESNs) due to work-related motivations. Furthermore, this study used the tricomponent attitude model to show that the employees' organizational concern and prosocial values mediate the impact of the organizational commitment on the work-related use of an ESN.

In all, 361 employees from seven Iranian companies using different ESN software packages were surveyed. The validity of the hypotheses was evaluated using partial least square–structural equation modeling (PLS-SEM).

The results of this study confirm that the employees' organizational commitment has a positive impact on their work-related use of the relevant ESN directly and through the mediating roles of their organizational concern and prosocial values.

Previous studies have carefully addressed the role of organizational commitment in the implementation of conventional information systems. However, this is among the few studies addressing the role of commitment in the work-related implementation of ESNs. The results of this study shed light on how employees with a high level of commitment toward the organizations for which they work take advantage of ESNs due to a work-related motivation for the accomplishment of their duties, for bringing benefits into the organization and for helping their coworkers.

The public sector (PS) has extensively utilized information technology (IT); however, research reveals that the failure rate remains high, particularly for national and sectoral IT (NaSIT) applications. To this end, numerous studies have been conducted to gauge the success of IT applications, where a significant number have demonstrated the importance of planning in this regard. Consequently, the current study aims to investigate the factors that influence the success of NaSIT planning and implementation within this sector.

A qualitative methodology and a systematic literature review encompassing papers indexed in seven databases until November 2022 were utilized.

The review of 92 selected papers revealed that the success of NaSIT planning and implementation is influenced by a number of factors divided into nine main categories. These include vision, goals and objectives; alignment; interoperability; infrastructure; involvement; equity and digital divide; privacy, security and trust; administration; and culture. Human, social, economic and organizational factors comprise the vast majority of these factors. By addressing these factors, the failure rate of IT plans can be reduced. Governments will be able to effectively employ this technology to accomplish their missions if these factors are considered in order to decrease the failure rate of IT plans.

By examining the factors that influence the success of NaSIT planning and implementation in the PS, this study attempts to provide a comprehensive view of various types of research. Furthermore, policymakers can employ this perspective to improve the efficiency and effectiveness of the PS.

The purpose of the study is to numerically investigate the characteristics of laminar heat transfer and fluid flow in a double tube heat exchanger (DTHE) using water-aluminum oxide (Al₂O₃) nanofluid. The study examines the effects of nanofluid in both counter and parallel flow configurations. Furthermore, an exergy analysis is conducted to assess the impact of nanofluid on exergy destruction.

The single-phase method has been used for Al₂O₃ nanoparticles in water as base fluid in a laminar regime for Reynolds numbers from 400 to 2,000. The effects of nanoparticle volume fractions (0 to 0.1), Nusselt number, Reynolds number, heat transfer coefficient, pressure drop, performance evaluation criteria (PEC) and the impact of counter and parallel flow direction have been studied.

The findings indicate that the incorporation of nanoparticles into the water enhances the heat transfer rate of DTHE. This enhancement is attributed to the improved thermal properties of the working fluid and its impact on the thermal boundary layer. Nusselt number, heat transfer coefficient, and PEC increase by approximately 19.5%, 58% and 1.2, respectively, in comparison to pure water. Conversely, the pressure drop experiences a 5.3 times increase relative to pure water. Exergy analysis reveals that nanofluids exhibit lower exergy destruction compared to pure water. The single-phase method showed better agreement with the experimental results compared to the two-phase method.

Dimensionless correlations were derived and validated with experimental and numerical results for the Nusselt number and PEC for both counter and parallel flow configurations based on the Reynolds number and nanoparticles volume fraction with high accuracy to predict the performance of DTHE without performing time-consuming simulations. Also, an exergy analysis was performed to compare the exergy destruction between nanofluid and pure water.

Health is one of the most basic human rights. Self-medication not only results in many risks, complications and mortalities but also remains a massive economic burden on governments’ pharmaceutical budgets, insurance companies and the general population. The importance of self-medication as one of the worldwide health problems, this paper aims to investigate the extent of this problem and related factors in Sanandaj, Iran in 2018.

This cross-sectional, descriptive study was conducted on 838 people who referred to pharmacies in Sanandaj, Iran in 2018. The subjects were selected in 10 pharmacies, 84 in each, randomly. A self-constructed questionnaire was used to collect information about demographic features, prevalence and reasons for self-medication. The data was analyzed statistically by SPSS software.

The results show a high prevalence of self-medication, 73.70 per cent among people who referred to the pharmacies in Sanandaj during 2018. There was a significant correlation between self-medication and occupation, education level, age groups, chronic disease, smoking or reasons to refer to pharmacies (p < 0.05). Analgesics, antibiotics; non-steroid anti-inflammatory, cold and gastrointestinal medicines were the most commonly used medicines by the subjects. People with headache, cold, infection, stomach pain, toothache and dysmenorrhea were more likely to act self-medication than people with other complaints. Among people who do self-medication, (85.60 per cent) had already experienced satisfactory results after using medicines. Mild symptoms of the disease (74.11 per cent), availability of medicines (72.98 per cent) and easy access to medicine supplies in pharmacies (71.35 per cent) are other reasons for self-medication.

In general, the study had some limitations. One of the limitations was related to the research period i.e. spring and summer. So, it is suggested to conduct studies in other seasons, too. Furthermore, as the time of self-medication was the past three months, there was a probability of recall bias.

The prevalence of self-medication in Sanandaj is high and alarming, implementing educational programs about this issue is extremely required. Health policymakers should take all necessary steps to tackle self-medication efficiently.

This paper aims to examine the reliability of a cooling seawater pumping station which pumps seawater to refineries and petrochemical plants in Kuwait mainly for cooling purposes. Owing to the harsh operating climate and the lack of other alternative sources of water, high reliability of the pumping system is crucially important.

The reliability of a system can be considered from different views. The one taken in this study is to measure the reliability of the cooling seawater arriving to the consumer at the required pressure and flow rate while observing the operational constraints on the system. A reliability model has been developed and applied to the actual data from the pumping station.

The preliminary results indicate that the model could be a useful tool to assess the current condition of the system and to find ways of improving system reliability and availability.

The paper provides information of value to all concerned with relibility management.

De facto use of International Financial Reporting Standards (IFRS) is a particular form of voluntary compliance with International Accounting Standards (IAS). It is practiced when an enterprise uses a number (and not all) of international standards as a complement to overcome the unachieved nature of local generally accepted accounting principles. The purpose of this paper is to analyze, at first, whether the financial expertise of Tunisian audit committee’s members is associated with de facto use of IFRS. Second, it explores to what extent and in what direction this association evolves when the factor auditor’s size is introduced as a moderator variable.

Data spanning a seven-year period (2012–2018) was hand-collected for a sample of 497 firm-year observations. Further, regression analysis was used to test the study’s hypothesis.

Findings show that the proportion of financial experts who sit on the audit committee is positively associated with the de facto use of IFRS. Besides, the association between audit committee members’ financial expertise and the voluntary use of IFRS is more pronounced when the company is audited by at least one BIG 4 audit firm.

The paper’s findings have implications for regulatory bodies and standards setters who are concerned with the functioning of the audit committee, especially when it comes to enhancing the quality of the financial statements. The results also shed light on the role of financial experts on the audit committee and Big 4 auditors to enforce the de facto use of IFRS.

The findings of this study contain an important message for the drift toward national de jure convergence with IAS.