5,090 research outputs found

    UMSL Bulletin 2023-2024

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    The 2023-2024 Bulletin and Course Catalog for the University of Missouri St. Louis.https://irl.umsl.edu/bulletin/1088/thumbnail.jp

    Modelling, Monitoring, Control and Optimization for Complex Industrial Processes

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    This reprint includes 22 research papers and an editorial, collected from the Special Issue "Modelling, Monitoring, Control and Optimization for Complex Industrial Processes", highlighting recent research advances and emerging research directions in complex industrial processes. This reprint aims to promote the research field and benefit the readers from both academic communities and industrial sectors

    Multi-objective optimisation model under multiplex weighted drivers’ collaboration network : Risk, time and profit management perspectives

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    This study aims to devise a multi-objective optimisation model through the use of drivers’ information diffusion capacity in transportation service procurement [TSP]. In this model, in addition to the profit optimisation of transportation companies, the allocation of freights to the most suitable drivers in the shortest possible time is considered. First, driver-to-driver interactions are modelled on a weighted drivers’ collaboration network and an overlapping community detection algorithm is used to identify the communities’ leaders and their drivers. Also, an objective function is developed to optimise the speed of order allocation to drivers in communities. To reduce the risk of losing customers, the VIKOR method is developed for ranking and allocating shipping orders to the most qualified drivers. This optimisation model enables us to simultaneously manage the three factors of time, cost, and suitability of drivers in allocating shipping orders to drivers. By solving this model, the results show novice companies tend to allocate orders to drivers in the shortest time, but well-known companies are willing to assign the orders with the lowest cost. Therefore, the results reflect the real behaviour of the TSP system, and companies can adopt policies corresponding to their risk level in allocating orders to drivers.publishedVersionPeer reviewe

    THREE ESSAYS ON CORPORATE SOCIAL RESPONSIBILITY

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    This thesis encompasses three empirical chapters, each focusing on a distinct aspect of corporate social responsibility (CSR) and examining both its drivers and outcomes at organizational and individual levels. The first empirical chapter investigates the role of gender diversity in top management teams and its relationship with firms’ CSR engagement. Drawing on resource dependence theory, the primary findings indicate that female directors significantly enhance firm's CSR performance by contributing to board diversity. Furthermore, the results reveal that social trust bolsters the effectiveness of female directors. The second empirical chapter explores the environmental issues and their driving factor, specifically institutional investors. The analysis demonstrates that institutional investors contribute to a reduction in greenhouse gas emissions among Chinese listed firms. The mechanism operates through the investors’ use of their voice in shareholder proposals. The final empirical chapter delves into external experiences that influence CEOs' attitudes towards their firms' CSR profiles. The findings suggest that CEOs, motivated by a desire to enhance their reputation, tend to engage more in CSR activities following the receipt of an award. Concurrently, the easing of financial constraints facilitates these decisions. Ultimately, the results support the notion that CSR agency problems can lead to decisions made by awarded CEOs that adversely impact firm value

    Wages and Utilities in a Closed Economy

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    The broad objective of this paper is to propose a mathematical model for the study of causes of wage inequality and relate it to choices of consumption, the technologies of production, and the composition of labor in an economy. The paper constructs a Simple Closed Model, or an SCM, for short, for closed economies, in which the consumption and the production parts are clearly separated and yet coupled. The model is established as a specialization of the Arrow-Debreu model and its equilibria correspond directly with those of the general Arrow-Debreu model. The formulation allows us to identify the combinatorial data which link parameters of the economic system with its equilibria, in particular, the impact of consumer preferences on wages. The SCM model also allows the formulation and explicit construction of the consumer choice game, where expressed utilities of various labor classes serve as strategies with total or relative wages as the pay-offs. We illustrate, through examples, the mathematical details of the consumer choice game. We show that consumer preferences, expressed through modified utility functions, do indeed percolate through the economy, and influence not only prices but also production and wages. Thus, consumer choice may serve as an effective tool for wage redistribution

    Graduate Catalog of Studies, 2022-2023

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    Strategies to Reduce the Impact of Disruptions in Manufacturing Transportation Supply Chains

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    Abstract Supply chain managers in the manufacturing transportation industry grapple with reducing the impact of disruptions in transportation supply chains since 50% of U.S. companies have experienced between six to 20 disruptions per year. Ineffective transportation disruption strategies negatively impact the performance and profitability of manufacturing organizations resulting in losses and business failure. Grounded in Goldratt’s philosophy and thinking process of the Theory of Constraints (TOC), the purpose of this qualitative multiple case study was to explore successful strategies supply chain managers in the manufacturing transportation industry used to reduce the impact of disruptions in transportation supply chains. The participants were three supply chain managers from three different manufacturing industries doing business in the Commonwealth of Massachusetts, who successfully implemented strategies that reduced the impact of disruptions in manufacturing transportation in their organizations. Data were collected through face-to-face semistructured interviews, archival records, and social media websites. Through thematic analysis, three themes emerged: (a) technology and innovative solutions, (b) supply chain collaborative efforts, and (d) logistics and transportation innovative strategies. A key recommendation is for supply chain managers to create multi-vendor transportation ecosystems to work together rather than working by themselves. The implication for positive social change includes the potential to create employment and increase local communities’ tax revenues that could be used to provide the most needed social services

    Cultivating Employee Relationships

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    The study was a qualitative flexible study on the actions and behaviors of employees and their leaders in cultivating internal relationships that have an impact on the business results of an organization. Using various triangulation methods, interviews, observations, and archived data, the study is constructive in design. I interpreted the experiences of the 20 participants (6 leaders and 14 employees). The flexible design allowed for follow-up questions that required changing the scope of the data collection as more data occurred. Validity and reliability are important factors in the qualitative research as these factors add to the credibility of the findings. Through member checking, validation occurred from the findings from the participants and checked for accuracy in the emerged themes. I was the primary data collector, analyzer, and documentation protector. Protecting the identity of the participants and Company X was done by keeping the documents, transcriptions, and findings on a password protected device. After 3 years, destroying the s information is necessary. Ethically, I did ensure the findings were free from bias using bracketing. Bracketing is a diligent process that involves the researcher to perform self-examinations to ensure that the bias and personal conclusions do not interfere with the true findings of the study

    LIPIcs, Volume 274, ESA 2023, Complete Volume

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    LIPIcs, Volume 274, ESA 2023, Complete Volum
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