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Climate changes are affecting the control of many vector-borne diseases, particularly in Africa. In this work, a dengue fever model with protected travelers is formulated. Caputo-Fabrizio operator is utilized to obtain some qualitative information about the disease. The basic properties and the reproduction number are studied. The two steady states are determined and the local stability of the states are found to be asymptotically stable. The fixed point theory is used to obtain the existence and uniqueness of solutions of the model. The Adams–Bashforth scheme is employed to solve an approximate solution of the fractional dengue model. The numerical simulation suggests that the fractional-order affects the dynamics of dengue fever.

This paper examines the effects of boundedly rational decision characteristics on travelers’ route choice behavior. The concept of boundedly rational confidence level (BRCL) is redefined, which is the probability that a trip arrives between the acceptable earliest arrival time and the acceptable latest arrival time on the shortest travel time budget (TTB). Mathematically, the acceptable boundedly rational arrival thresholds are proposed. Then, a reliability-based boundedly rational traffic equilibrium model (R-BRTE) considering both travel time reliability and acceptable arrival thresholds is developed. Moreover, the equivalent variational inequality problem and uniqueness of solution on the proposed model are proved. A route-based solution algorithm is used to solve the proposed R-BRTE model. Numerical results present the important decision ideas of the proposed model. The results demonstrate that travelers’ bounded rationality has a great impact on their route choice behavior and network performance.

With the current situation of insecurity in Nigeria and the worsening condition of Nigerian roads, there is increasing demand for air travel. This increasing demand for airline services amidst limited resources results in passenger dissatisfaction and reduction of revenue for airports and airlines. The dynamics of service demand and resource supply result in check-in issues for all the stakeholders in the commercial aviation industry. Hence, this research simulated the developed model for travelers’ check-in process at the “D Wing” of the Departure Section of Murtala Muhammed International Airport (MMIA), Ikeja, using Arena Software Tool. The simulation of the developed model was carried out by varying five different configurations of the servers with respect to the baggage weighing machines and passenger profiling devices to obtain the minimum average check-in time (ACT) for the process, with each configuration undergoing 133 completions of simulation runs. The result of the experimentation revealed that the 3 × 3 × 4 configuration of servers produced the smallest ACT of 18.25 minutes. This translates to a difference of about 58 minutes from the 76.16 minutes ACT of the real system; representing about 76% improvement in the check-in time of passengers. This study contributed to knowledge by revealing that the main choke points in the MMIA check-in system occur at the baggage weighing and passenger profiling areas as against the check-in counter sub-section as advanced by previous works. Furthermore, the research added value to knowledge by creating a balance between customer satisfaction and cost of operations thereby accommodating the interests of the passenger and the operator who are the two main stakeholders in the commercial aviation industry.

Travelers’ duty-free shopping represents an under-researched consumption behavior with far reaching management and marketing implications. This study explores the extent to which three surface personality traits (impulsiveness, shopping involvement, and escapism) mediated by store atmosphere, store temptation, and shopping enjoyment, lead to buying in duty-free stores. A convenience sample of 163 Israeli adults in Israel’s Ben-Gurion International airport was used. A SEM-PLS model was used to analyze the relationships among the model’s constructs. The model supports the positive impacts of traits impulsiveness, shopping involvement, and escapism on buying behavior in duty-free stores, mediated by store atmosphere and store temptation (shopping enjoyment only affecting store temptation). A post-hoc analysis showed a positive relationship between store atmosphere and store temptation. This paper contributes to the literature by developing and testing an integrative model with important implications for tourism and hospitality industries. Deriving from the findings of this study, it behooves managers of stores and centers to promote the environmental sustainability aspects of the products sold in these stores.

The system of two parking lots is researched: paid and free. The task of the city authorities is to determine part of the land for parking agency. The agency selects the best parking fee, and travelers determine which parking to choose. The goals of each participant are different: passengers attempt to minimize the loss of time and parking fees, the agency maximizes profits, and the city thinks about the public good (in this case, about all travelers). The mutual dependence of participants leads to the need to apply game theory to describe their interaction. The mathematical model defines restrictions on the parameters for existence Nash equilibrium. The numerical example that does not contradict the existing picture of the world is considered.

Background: Policies such as border closures and quarantines have been widely used to minimize the spread of SARS-CoV-2 during the COVID-19 pandemic. However, such policies curbed international trade, travel, and tourism, leading to economic loss. Methods: We calculated the risks of individual travelers based on their expected transmission, defined as the expected number of subsequent infections resulting from an individual. It is calculated by multiplying the probability of travelers having COVID-19 after negative test(s), with the effective reproduction number (Rt) of the viral strain/variant. The expected transmission varies based on the incidence rate among unvaccinated or the breakthrough infection rates (BIRs) of the vaccinated; waning vaccine efficacy; transmissibility of the dominant variants; properties of various diagnostic tests used; and restriction policies in the arrival countries. For a traveler to be released, the expected transmission was benchmarked against that of an unvaccinated traveler quarantined for 14 days without testing, previously calculated to be 0.005. Results: We found that all individuals with a negative preboarding test can be released with a negative post-arrival test, with both tests achieving sensitivity ≥ 90% and specificity ≥ 97%, which could be accomplished by rapid antigen tests. This is valid for an incidence rate up to 0.1 (prior to testing) and Rt up to 4 in the arrival country. In a sensitivity analysis scenario where the incidence rate is 0.4 and Rt is 16, a negative preboarding test and a negative post-arrival test, both with sensitivity ≥ 98% and specificity ≥ 97% (usually accomplished by a Polymerase Chain Reaction test or other Nucleic Acid Amplification tests) can ensure that a traveler has a lower expected transmission than an unvaccinated person who is quarantined for 14 days. Conclusions: As vaccines become more available around the world, this study provides the scientific basis for setting policies of testing with or without quarantine for international travelers. In many cases, travelers with full vaccination (with or without booster) and a negative preboarding test can be released with a negative rapid antigen test upon arrival, which will allow the travelers to depart the airport within 30 minutes.

While volunteer tourism has been gaining in popularity around the world, few studies have looked into the travelers’ re-participation intention within a pro-social context. This study aimed to deve...

This study investigates the impact of heterogeneous psychological inertia of travelers on link flow evolution process on a day-to-day basis. The psychological inertia of a traveler is defined as hi...

The purpose of this paper builds a model for the loyalty of domestic travelers. We gathered research data from 345 consumers in Nha Trang City, Khanh Hoa Province, Vietnam. The research model was proposed from previous researches. Besides, we applied the partial least squared structural equation modeling (PLS-SEM) with SmartPLS software for data analysis. The research results showed the moderating effect of diversity in the relationship between auxiliary service and satisfaction to the loyalty of domestic travelers found significant.