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Deficiencies or imbalances in dietary fat intake may influence on mental and neurological functions of children with autism spectrum disorders (ASD). This study aims to compare body mass index (BMI) and the amount of fatty acids intake in the autistic patients with the comparison group.

This case-control was carried out on 200 randomly selected children from 5 to 15 years old (100 autistic patients as the case group and 100 healthy children as the comparison group) in Tehran, Iran. The food frequency questionnaire (FFQ) was used to assess the intake of calorie, macronutrients and different types of dietary fatty acids including saturated fatty acids (SFA), monounsaturated fatty acids (MUFAs), poly unsaturated fatty acids (PUFAs), linoleic acid (LA), α-Linolenic acid (ALA), eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA) and trans fatty acids.

The autistic patients had higher BMI, birth weight and mother’s BMI compared to the comparison group (All p < 0.01). No significant difference was found in the amount of dietary calorie, protein, carbohydrate and total fat intake between two groups. The risk of ASD was associated with higher intake of MUFAs (OR: 3.18, CI%:1.13–4.56, p = 0.04), PUFAs (OR: 4.12, CI95%: 2.01–6.25, p < 0.01) and LA (OR: 4.76, CI95%: 1.34–14.32, p < 0.01).

The autistic children had higher BMI and higher intake of unsaturated fatty acids except for omega-3 fatty acids. Further longitudinal studies are warranted.

This study aims to investigate the influence of requirement engineering (RE) on project performance (PP) in the context of NEOM* in Saudi Arabia. The study also aims to examine the relationship between three components of RE, evolving market needs (ECN), market changes (MC) and technological advancements (TA), on PP, through the mediating influence of effective communication (EC), change readiness (CR) and stakeholder engagement (SE). Further, the study aims to examine the moderating effect of team cohesion (TC) on the RE–PP relationships.

A research framework is developed by drawing on the resource-based theory and with the support of empirical evidence and rational arguments to propose a set of hypotheses relating to the constructs in the framework. The hypotheses are tested through survey data collected from individual employees working on different projects across NEOM. A total of 336 useable responses were collected that were analyzed through covariance-based structural equation modeling using AMOS v.28.

The results show although ECN and TA both have a positive impact on PP, MC had no significant relationship with PP. In terms of the mediation hypotheses, EC, CR and SE all partially mediate the relationships between ECN and TA with PP. However, there was no mediating effect in the relationship between MC and PP. Moreover, EC, CR and SE themselves have a significant positive influence on PP. Finally, TC proved to be a significant moderator between ECN and PP and TA and PP, but not in the case of MC and PP.

This study makes three novel contributions. First, most prior empirical studies examined the overall impact of RE on PP; however, the current study provides a more nuanced insight into the relationships between the three components of RE (i.e. ECN, MC and TA) and PP. Second, the mediating roles of EC, CR and SE between components of RE and PP present a finer-grained understanding of how project resources are linked to project success goals through features of the project team. Third, moderating influence of TC with regard to a higher possibility of success for projects are highlighted through this discovery.

This study examines the impact of consumer-perceived value (CPV) dimensions such as product quality, price fairness, brand prestige and brand positioning on brand attitude and loyalty for electronic home appliance brands in an emerging market. It also explores the moderating effect of perceived store image on the relationship between brand attitude and loyalty.

This study proposes an integrated model based on consumption values and the value-attitude-behavior (V-A-B) framework. Survey data from 209 Bangladeshi consumers of electronic home appliances were used to test the model. Covariance-based structural equation modeling (CB-SEM) and PROCESS macro were employed to test the hypotheses.

This research underscores the importance of CPV dimensions, such as product quality, price fairness, brand prestige and positioning, in predicting brand loyalty through brand attitude. Store image moderates the link between brand attitude and loyalty, with a stronger relationship when store image is high and a weaker relationship when it is low.

This study broadens marketing and consumption value theory by investigating brand prestige and positioning in the V-A-B framework in the emerging market. This is the first study to use perceived store image to moderate the relationship between brand attitude and loyalty.

This study’s fundamental objective is to assess climate change impact on reference evapotranspiration (ET_o) patterns in Egypt under the latest shared socioeconomic pathways (SSPs) of climate change scenarios. Additionally, the study considered the change in the future solar radiation and actual vapor pressure and predicted them from historical data, as these factors significantly impact changes in the ET_o.

The study utilizes data from the Coupled Model Intercomparison Project Phase 6 (CMIP6) models to analyze reference ET_o. Six models are used, and an ArcGIS tool is created to calculate the monthly average ET_o for historical and future periods. The tool considers changes in actual vapor pressure and solar radiation, which are the primary factors influencing ET_o.

The research reveals that monthly reference ET_o in Egypt follows a distinct pattern, with the highest values concentrated in the southern region during summer and the lowest values in the northern part during winter. This disparity is primarily driven by mean air temperature, which is significantly higher in the southern areas. Looking ahead to the near future (2020–2040), the data shows that Aswan, in the south, continues to have the highest annual ET_o, while Kafr ash Shaykh, in the north, maintains the lowest. This pattern remains consistent in the subsequent period (2040–2060). Additionally, the study identifies variations in ET_o , with the most significant variability occurring in Shamal Sina under the SSP585 scenario and the least variability in Aswan under the SSP370 scenario for the 2020–2040 time frame.

This study’s originality lies in its focused analysis of climate change effects on ET_o, incorporating crucial factors like actual vapor pressure and solar radiation. Its significance becomes evident as it projects ET_o patterns into the near and distant future, providing indispensable insights for long-term planning and tailored adaptation strategies. As a result, this research serves as a valuable resource for policymakers and researchers in need of in-depth, region-specific climate change impact assessments.

This study aims to confirm the causal relationship between emotional brand attachment, brand love, and brand commitment, and then explain how these variables affect active engagement. In addition, it is to confirm the effect of brand prestige, brand consciousness, and brand trust on emotional brand attachment and to identify the moderating role of self-congruity in the causal relationship between these variables.

In this study, a survey was conducted targeting 320 consumers who have recently purchased luxury products or brands. In addition, structural equation model analysis (SEM) was used to test the research hypotheses raised in this study.

The results found that brand prestige and brand consciousness affect on emotional brand attachment. Emotional brand attachment had a significant effect on brand love and brand commitment. And brand love affect brand commitment and active engagement. Emotional brand attachment affects active engagement. Brand love was mediated in the relationship between emotional brand attachment and active engagement. Self-congruity was moderated in the relationship between brand prestige and emotional brand attachment. However, self-congruity was not moderated in the relation to brand consciousness, brand trust and emotional brand attachment.

This study has significance in that it identified the antecedent factors that cause consumers' emotional brand attachment and confirmed that they have differential effects depending on the degree of consumer self-congruity. In addition, this study is meaningful in that it confirmed the concept of the causal difference between attachment and brand love as consumers' emotional responses to luxury brands. However, the scope of this study was limited to offline stores excluding online purchases as a place of purchase for luxury brands. In a situation where the purchase of luxury brands is gradually increasing in various online environments, limiting the scope of the study to offline stores may have problems in generalizing the study. Therefore, in future research, we would like to propose a study on the relationship and influence between these variables by integrating all purchasing environments, such as offline and online.

The management implications of the results of this study are as follows. First, brand marketers and managers must suggest strategies to increase emotional attachment to customers who are satisfied with the brand and have a favorable brand attitude. After segmenting target customers and identifying their tendencies, behavioral characteristics, and preferred brands, emotional attachment can be strengthened by providing information about the brand to each segment and strengthening the brand image. Strategies like these can help target customers strengthen their emotional connection to a luxury brand, build positive attitudes toward the brand, and prevent them from switching to competing brands. Second, a strategy is needed to ensure that target customers have a strong emotional response to the company's luxury brand and become immersed in the brand. Target customers who have an affinity for the brand can strengthen their level of brand attachment and become immersed in the brand by allowing them to directly participate in brand activities through various advertising campaigns, events, and content. Third, you can strengthen your brand by developing a brand that fits the self-concept of your target customers. Brand marketers or managers can strengthen brand attachment by presenting a brand that fits the characteristics of each target customer and recognizing that the brand's status is relatively high compared to competing brands.

This study identified how consumers' brand engagement in a luxury brand environment is influenced by its components. In other words, the preceding factors for consumers' brand emotion were identified, and the influence of emotional brand attachment and brand love, which represent the consumer's emotional state that affects consumers' brand engagement, was investigated. The theoretical implications of the results of this study are as follows. First, Shahid et al. (2022) found that emotional attachment was expressed more strongly when emotional bonds were formed through relationship formation. Hwang and Kandampully (2012) found that emotional attachment and brand love are conceptually similar but differ in intensity. And Gómez-Suárez (2019) said that brand attachment is a prerequisite for brand love. As mentioned earlier, previous research has shown that emotional attachment and brand love differ depending on the consumer's emotional state. The results of this study showed that emotional brand attachment did not affect active participation, while brand love did. This means that active engagement is directly influenced by brand love rather than emotional attachment. Through these research results, it can be confirmed that even if consumers have similar brand emotional states, the impact on consumer behavior is different depending on the intensity of the emotional state. Therefore, in the consumer-brand relationship, the intensity of emotions arising from the interaction between the consumer and the brand is different, and only when brand emotions are at a high level, consumers engage in behavioral participation toward the brand. Second, Morris and Keltner (2000) found that consumers activate the integration of emotions in the decision-making process. Hwang and Kandampully (2012) found that love induces consumers to maintain a relationship with a brand, and that brand commitment increases when consumers feel intimacy and a strong emotional bond between themselves and the brand. Through these prior studies, it was confirmed that emotions play an important role in the consumer's decision-making process, and in particular, it was confirmed that maintaining close relationships with others induces emotional commitment to the object. In this study, brand loyalty was also found to have a positive effect on brand immersion and active participation. Therefore, consumers need to foster strong bonds with luxury brands to create brand love and strengthen their relationship with the brand, leading to brand commitment and active participation. Third, Ji et al. (2018) found that brand reputation has a positive effect on consumer attitudes and behaviors, including brand attachment, purchase intention, and brand loyalty. Casidy et al. (2015) found that consumers with high brand awareness are likely to have high brand preference and have favorable and positive brand attitudes due to their high brand knowledge. Previous research has shown that consumers' brand reputation and brand consciousness influence brand attachment.

This study dealt with a more comprehensive variable in the relationship between luxury brand factors as an antecedent variable of emotional brand attachment in luxury brand situations, and provided important evidence for the mediating effect of brand love, which was a limited emotional variable. In addition, additional implications for the moderating role of brand self-congruity on emotional brand attachment were suggested.

This paper aims to analyse the weekday effect on the Nifty Shariah indices as per the Islamic calendar. The study is intended to know about the return and volatility of these indices during Ramadhan and non-Ramadhan days.

The study focuses on analysing the Nifty Shariah indices and Sensex daily returns collected from NSE India and BSE India, respectively, during the period of 1 August 2016 to 31 July 2022. Descriptive statistics are used to analyse the data, while the Ordinary Least Square method is used to determine the impact of weekdays on the Nifty Shariah indices. Additionally, the study applies the GARCH statistical model to examine the influence of Ramadhan on the returns and volatility of the Nifty Shariah indices.

All of the Nifty Shariah indices produced positive returns during the overall sample period. According to the study, Tuesday index returns outperform other weekdays. The GARCH model indicated that the coefficient values for the Nifty 50 Shariah and Nifty 500 Shariah indices were negative. Ramadhan has a strong negative effect on volatility, according to this study.

The outcomes of the research are beneficial for investors aiming to exploit daily or weekly price fluctuations, rather than pursuing extended investment periods. Furthermore, fund managers can employ these findings to shape trading strategies, and academics can examine the performance of Shariah indices in the Indian context. This enables devout investors to make significant financial choices, thus advancing ethical values in society and upholding standards of both public and private morality.

This paper aims to review 69 studies related to Muslim consumer behavior and determine the relationship between these topics and Islamic rationality. In addition, this paper elaborates on Al-Ghazali’s Islamic rationality model.

A text analytics approach is used to map 69 studies on Muslim consumer behavior. In addition, the historical-critical and inductive approach is used to identify Muslim scholars’ concepts and opinions regarding Islamic rationality, especially Al-Ghazali.

This study confirms that Muslim consumer behavior is in line with the concept of Islamic rationality proposed by Al-Ghazali. This is evidenced by a strong awareness of Islamic morals and values, which fosters a high commitment to halal products.

The findings of this study will provide essential benefits in the development of Islamic rationality theory, which can then be used as an alternative in explaining Muslim consumer behavior and also can be used as a reference for stakeholders in the industry to mainstream halalfication on products offered in the Muslim market.

The value of originality in this study lies in identifying the relation between Islamic rationality and Muslim consumer behavior, and this effort was confirmed through 69 selected studies related to Muslim consumer behavior.

Although small businesses are important to the economy, few studies have examined how the small restaurant experience influences customer behavior. Thus, the purpose of this study is to develop a model and examine the influence of small restaurant attributes (i.e. authenticity) on customers’ positive attitudes and behavior.

Using 181 responses from customers of small restaurants, this study examines how the dimensions of authenticity (i.e. continuity, credibility, integrity, and symbolism) affect customers’ positive behavioral intentions through emotional attachment.

The results of partial least squared–structural equation modeling demonstrate that customer perceptions of symbolism, credibility, and integrity in their experience at a small restaurant influence their attachment, which in turn influences both their word of mouth and revisit intentions. However, continuity has no significant effect on customers’ emotional attachment to service providers. Also, the effects of authenticity on customer behavior vary across demographic categories.

With increasing competition in the small business context, service providers seek to understand how to create positive customer patronization behavior. This study provides guidelines for small business owners who are developing marketing strategies.

This study aims to investigate the impact of ResearchGate (RG) scores on the scientific indicators of Qur’anic productions in Scopus.

This research is fundamental in method, created in a descriptive method and a scientometric approach. The statistical society includes 4,105 records produced by writers in the field of Qur’an during the time period of 2011–2020 indexed in the Scopus database. In this study, Pearson correlation coefficient test is used with aid of Excel and SPSS software.

Countries such as Malaysia, the USA and Indonesia, respectively, hold the highest number of scientific productions in the field of Qur’an. Iran holds the fourth place with a 544 record difference in comparison to Malaysia (866 documents). There is a positive and meaningful relation between measures of RG, readers, followers, citations and the H-index score regarding writers with received citations and the H-index score of scientific productions in the field of Qur’an in Scopus. However, no relation can be observed between the mentioned measures and indicators of the number of documents with cowriting.

Because of some authors not using the same name in their articles, it was not possible to access their profile in RG. For this reason, the information of these authors was not accessible in RG.

The activity of researchers in social networks will receive feedback from readers. This will result in more citations. Contrary to expectations, the research results showed that Iran does not have a good position in publishing Qur’anic works. Therefore, researchers should publish their findings in international journals.

Iranian writers should try to publish their scientific productions in international publications and also widely spread their content and research results across social networks to increase feedback and gain the attention of readers. This process leads to receiving reader feedback and publication of the Islamic teachings.

The relationship between the number of citations of Qur’anic works in Scopus and altmetric indicators in RG has not been investigated in previous researches. Therefore, this research is innovative in this field.

The present study aimed to investigate the impact of social networks on the use of academic libraries by university students.

The method used in the present study was a survey. The statistical population included 461 university students. The data collection tool was a questionnaire. The result of the Cronbach test was equal to 0.726 indicating the acceptable reliability of the questionnaire. For data analysis, descriptive statistical methods and inferential statistical methods using SPSS 21 software were employed.

The findings showed that 243 of the participants used social networks for 4–6 h a day, 192 students never used university libraries and 229 used the university library only once in a month. Communication with friends was also reported to be one of the main goals in using social networks. The results of regression analysis also indicated that four predictor variables including information retrieval, social influence, trust and attractiveness of social networking environment were statistically able to explain the variance of reluctance to use university libraries.

The present study is one of the few studies that has examined the negative impact of social networks on visiting university libraries.