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Keywords = state/anarchy model

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21 pages, 1513 KB  
Article
Model Validation and Strategy Analysis in Retrial Queues with Delayed Vacations and Feedback Based on Monte Carlo Simulation
by Yanling Huang, Ruiling Tian and Junting Su
Mathematics 2025, 13(11), 1856; https://doi.org/10.3390/math13111856 - 2 Jun 2025
Viewed by 823
Abstract
Inspired by call centers, this paper models them as a constant retrial queue, with feedback and delayed vacations to balance high efficiency and low cost for service agents. After completing the service, the server randomly waits for an idle period. If customers arrive [...] Read more.
Inspired by call centers, this paper models them as a constant retrial queue, with feedback and delayed vacations to balance high efficiency and low cost for service agents. After completing the service, the server randomly waits for an idle period. If customers arrive during this period, the service is provided immediately, otherwise, the server will take a vacation. We first derive steady-state probabilities and key performance measures. Then, the system cost is modeled. Particle Swarm Optimization (PSO), Ant Colony Algorithm (ACA) and Sparrow Search Algorithm (SSA) are applied to obtain the minimum system cost, respectively. To verify the correctness of the theoretical results of the system model, we simulate the model using Monte Carlo simulation to obtain the probabilities of different server states and the expected number of customers in the system, and then compare them with the theoretical values. At the same time, the sensitivity of the performance measures obtained by Monte Carlo simulation to the system parameters is also analyzed. Finally, customer behavior is analyzed, and equilibrium and socially optimal arrival rates are derived. In addition, the efficiency of the system is evaluated by examining efficiency indicators such as throughput and price of anarchy. Full article
(This article belongs to the Special Issue Advances in Queueing Theory and Applications)
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20 pages, 539 KB  
Article
Methodological Nationalism in Global Studies and Beyond
by Agnes Katalin Koos and Kenneth Keulman
Soc. Sci. 2019, 8(12), 327; https://doi.org/10.3390/socsci8120327 - 4 Dec 2019
Cited by 9 | Viewed by 9288
Abstract
Global studies, or the study of globalization, is a diverse field of research, with different disciplinary focuses and with some national versions. Russian Alexander Chumakov constructed it as a philosophical discipline, while in U.S. academia it is considered an empirical inquiry at the [...] Read more.
Global studies, or the study of globalization, is a diverse field of research, with different disciplinary focuses and with some national versions. Russian Alexander Chumakov constructed it as a philosophical discipline, while in U.S. academia it is considered an empirical inquiry at the intersection of area studies, international studies, and international relations. This paper focuses on American global studies, pointing out the heavy epistemological burden it inherited from the field of knowledge dominated by international relations, which enshrines both methodological and political nationalism. International relations makes claims to be the sole theory originator in this field, but it may be criticized for several methodological and ethical issues (such as unwarranted simplifications that purge empirical contents to the point of unfalsifiability, antiquated epistemic ideals, Western and hegemonic biases, besides methodological nationalism), thus alternate theorizations are highly desirable. Full article
(This article belongs to the Special Issue Reshaping the World: Rethinking Borders)
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