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Fatigue effects related to answering a sequence of choice tasks have received much scrutiny in the stated choice experiments (SCE) literature. However, decision fatigue related to the time of day when respondents answer questionnaires has been largely overlooked in this literature even though time of day related fatigue effects are well known in the psychology literature. The purpose of this paper is to hypothesize that variations in the time of day when respondents answer an online food choice experiment will translate into observable fatigue effects in the food choices.

An empirical SCE concerning food choices is conducted using a web-based questionnaire for interviews in a pre-recruited online panel of consumers. Timestamps collected during the online interviews provide knowledge about the time of day at which each respondent has answered the survey. This information is linked with knowledge from a food sociology survey on typical meal times as well as biophysical research linking food intake to blood sugar and mental energy in order to generate a proxy variable for each respondent’s level of mental energy when answering the food choice tasks in the questionnaire.

Results show evidence of a time of day effect on error variance in the stated food choices as well as the subsequently estimated market share predictions. Specifically, respondents provide less consistent answers during the afternoon than at other times of the day.

The results indicate that time of day can affect responses to an online survey through increased fatigue and correspondingly less choice consistency. Thus, especially online surveys might account for this in data analysis or even restrict accessibility to the online survey for certain times of day.

Ramadan intermittent fasting (RIF) has produced heterogeneous and domain-specific effects on cognitive function. This study aims to investigate the effect of RIF on verticality perception or estimation of subjective visual vertical (SVV) in young adults. The significance of SVV is that it is essential for spatial orientation, upon which many daily activities depend.

Verticality perception was assessed with a computerized rod and frame test (CRFT) in two visual conditions: without a surrounding frame and with a distracting tilted frame. The tilted frame condition measures level of visual dependence or reliance of visual cues for posture and orientation. In total, 39 young adult men were recruited at different stages of Ramadan fasting: 21 were tested at the end of the first week (Week 1) and 18 others at the end of the third week (Week 3) of Ramadan. Also, 39 participants were recruited to serve as a non-fasting control group. Factorial ANOVA analyses were conducted to identify the main effects of fasting status, time-of-day and the interaction between them on blood glucose levels, nocturnal sleep duration and vertical alignment errors.

The main effect of fasting status on glucose level was significant (p = 0.03). There was a significant time-of-day main effect on glucose levels (p = 0.007) and sleep duration (p = 0.004) only in fasting participants. Neither the main effects of fasting status nor time-of-day were significant for rod alignment errors in both visual conditions. The interaction of fasting status and time-of-day was not significant either. This may indicate that any negative effect of Ramadan fasting on activities that are critically dependent on verticality perception and spatial orientation, such as sports and driving, may not be due to verticality misperception.

The present study was the first to investigate the effect of Ramadan fasting on spatial orientation. It demonstrated robustness of verticality perception to fasting status and the point of fasting during Ramadan. Verticality perception was also unaffected by time-of-day effects in non-fasting and fasting groups at two different points of Ramadan. This study corroborates others reporting heterogeneous effects of Ramadan fasting on cognitive function.

The purpose of this paper is to synthesize, organize, and discuss multidisciplinary research influential to a service firm's use of a cyclical time‐based marketing approach that may be aptly termed time‐of‐day services marketing, to introduce a general process and framework to assist in the evaluation of its strategic use, and to present areas in need of future research.

Objectives are achieved via conceptual analysis and a synthesis and organization of the relevant multidisciplinary literature.

The paper finds that the principal benefits to service firms of adopting a time‐of‐day services approach in varying degrees are that it is able to assist the firm in offering multiple, unique value‐propositions, providing superior contextual value to the customer, enhancing customer perceptions of value in relation to their needs, and supporting the firm's pursuit of a sustainable competitive advantage in its services.

Time‐of‐day services marketing is a viable approach for some firms but is not a strategy to be pursued by all firms. Service industry executives and managers should carefully weigh its adoption in terms of an overarching framework to identify the best services strategy for their marketing and business objectives.

Time‐of‐day services marketing has received little strategic attention in the services marketing literature. Furthermore, there is no good, published source of guidance to help service industry executives and managers make decisions about the extent that such an approach may present opportunities for value creation and competitive advantage. This paper addresses these voids by providing and discussing a comprehensive set of multi‐disciplinary factors, process, and framework that facilitate its evaluation for strategic adoption. Theoretically, the research contributes to the body of services marketing knowledge by altering the services marketing view of the “day” to be one that can be increasingly examined as less‐constant in terms of many service‐relevant individual and social behaviors, more systematically varying, and increasingly explainable on biological/physiological, sociological and/or psychological bases which are ultimately highly relevant to services marketers

The purpose of this paper is to examine factors affecting the engagement metrics of the hotel Facebook page. Such factors include time-of-day, day-of-week, age, gender and distance between the hotel and users’ origin of residence. Another purpose is to assess the impact of Facebook engagement on electronic word-of-mouth (eWOM), to better understand the importance of the engagement metrics within the hotel Facebook context.

This study uses secondary data from the Facebook page of a 147-room hotel in Northeast America. A total of 181 observations reflecting primary Facebook metrics are adopted via Facebook Insights between January 2014 and June 2014.

The number of daily-engaged users positively affects the number of daily people talking about the page (eWOM). Moreover, the number of engaged users differs significantly by the external factors (time-of-day, day-of-week, age, gender and distance).

Hotel Facebook developers should post the most important promotions on Monday afternoon, targeting females aged between 25 and 34 years living within 50 miles of the hotel. Posting on hotel Facebook a few hours before “traffic” to avoid competition and gain visibility is important. Marketers should focus on giving feedback during peak times.

This empirical study extends prior studies on social media metrics to the effects of external factors on the engagement metrics within the hotel Facebook context. Increasing the number of engaged users improves the effectiveness of eWOM for a hotel, which lacks empirical evidence.

This study aims to analyse the air traffic control (ATC)-related accidents and incidents. The paper aims to determine technical, operational and environmental factors that influence ATC-related accidents and incidents. This is important to reduce the number of these accidents.

This predictive and dipendence study investigated situational factors indicated in the data sets of National Transportation Safety Board (NTSB) and European Union Aviation Safety Agency (EASA) (for the period 2008–2018). The specific factors were time of day in which accident occurred, location, air traffic management (ATM) contribution, flight rules, ATC unit and outside factors. Logistic regression was used to differentiate factors between fatal ATC-related accidents versus ATC-related incidents. Further, by using Pearson’s chi-squared test, significant relationships between all factors in ATC-related accidents and ATC-related incidents were identified.

The results showed that five factors of total six factors – ATM contribution, flight rules, ATC unit, outside factors and aircraft location – influence to ATC-related accidents and incidents. Further, results showed significant relationships between each all factors in ATC-related accidents and incidents. According to that, differences and similitudes are presented.

After more than 20 years, study about ATC-related accidents and incidents was necessary to establish changements in thıs type of accidents. Belong of that, this is the first study that used data sets of both, NTSB and EASA, to determine the factors that affect ATC-related accidents and incidents.

The paper aims to propose a new mathematical model for allocation and scheduling of vessels at multiple marine container terminals of the same port, considering the access channel depth variations by time of day.

This paper proposes a new mathematical model for allocation and scheduling of vessels at multiple marine container terminals of the same port, considering the access channel depth variations by time of day. The access channel serves as a gate for vessels entering or leaving the port. During low-depth tidal periods the vessels with deep drafts have to wait until the depth of the access channel reaches the required depth.

A number of numerical experiments are performed using the operational data collected from Port of Bandar Abbas (Iran). Results demonstrate that the suggested methodology is able to improve the existing port operations and significantly decrease delayed vessel departures.

The contribution of this study to the state of the art is a novel mathematical model for allocation and scheduling of vessels at multiple terminals of the same port, taking into consideration channel depth variations by time of day. To the best of the authors’ knowledge, this is the first continuous berth scheduling linear model that addresses the tidal effects on berth scheduling (both in terms of vessel arrival and departure at/from the berth) at multiple marine container terminals.

The purpose of this study is to develop an optimization method for charging plans with the implementation of time-of-day (TOD) electricity tariff, to reduce electricity bill.

Two optimization models for charging plans respectively with fixed and stochastic trip travel times are developed, to minimize the electricity costs of daily operation of an electric bus. The charging time is taken as the optimization variable. The TOD electricity tariff is considered, and the energy consumption model is developed based on real operation data. An optimal charging plan provides charging times at bus idle times in operation hours during the whole day (charging time is 0 if the bus is not get charged at idle time) which ensure the regular operation of every trip served by this bus.

The electricity costs of the bus route can be reduced by applying the optimal charging plans.

This paper produces a viable option for transit agencies to reduce their operation costs.

Explores the universality of Belk’s concept of situational variables in their relationship with consumer purchase within two different cultures. Considers the relationship of five empirical dimensions with two measures of consumer purchase behaviour. The five empirical manifestations of the situational variables were included in surveys conducted in India and the USA. The empirical dimensions of the situational variables (frequency of shopping visit; the usual time of day for shopping; travel time; time spent; and number of companions) were all statistically significant when comparing India and the USA with respect to shopping behaviour (purchase of food or beverage and purchase of other products). Includes examples of how marketers might influence consumer situations within the Belkian framework in order to modify purchase behaviour.

The objective of this study is to investigate the existence of a diurnal pattern in the occurrence of adverse clinical management events.

The approach takes the form of a retrospective record review of adverse clinical management events occurring in the 63 facilities of a statutory public health provider in rural south‐eastern Australia. Between January 2006 and December 2007, 2,463 clinical management incidents were reported by clinical staff to a specially designed database.

Adverse clinical management incidents exhibit a marked diurnal pattern. This pattern was evident in both medicine and surgery as well as across facilities of differing acuity. The acrophase or peak of the daily cycle occurs at 14:30 hrs (95%CI 13:25 and 15:34 hrs). Although surgical events peaked earlier in the day (14.02hrs: 95%CI 12:32‐15:32) compared with medicine events (15:26hrs: 95%CI 13:07‐15:32), this difference was not statistically significant.

As the activity rate in the hospital is unknown, this finding study reports the time of the day when most adverse events occur and not their rate as a function of procedural volume.

The existence of a diurnal pattern provides valuable information for strategies aimed at improving patient safety and health care quality. Interventions can now be more accurately targeted.

The paper is the first to move beyond descriptive data of the timing of adverse events and offers a model using chronobiological methods. The demonstration of the existence of diurnal patterns should improve programmes to reduce adverse events.

The purpose of this paper is to examine behavioral changes by consumers (i.e. changing time of day they contact a firm, requesting a domestic service provider, and ceasing doing business with the firm) when faced with being provided a service from abroad.

Data were collected from a pre‐recruited internet panel of 394 American consumers. Hierarchical regression analysis, including demographic and psychographic variables, was employed to determine which variables were instrumental in predicting behavioral changes among consumers when being provided a service from abroad.

The results suggest that American consumers are wary of services offshoring and that psychographic variables (boycott issue importance and negative word of mouth) are more instrumental than demographic variables in predicting behavioral changes by consumers.

Future research should examine consumer attitudes about services offshoring from populations in countries other than the US, and in relation to different types of services and the importance of those services to consumers.

Implications for firms include assessing their customer's perceptions of offshoring, proactively communicating with customers about offshoring practices, and providing customers with some control over their service interactions.

Previous researchers have highlighted the benefits of services offshoring to firms but also hypothesized that consumers may react negatively when provided services from abroad. In this research, it is found that consumers will change the way they interact with a firm when faced with being provided a service from abroad.