Search Results (242)

It is well known that there is a significant conflict of interest between high-speed rail (HSR) operators and logistics companies. This study proposes an HSR freight pricing strategy based on a multi-objective optimization framework and a freight mode splitting model based on the Logit model. A utility function was constructed to quantify the comprehensive utility of different modes of transportation by integrating five key influencing factors: economy, speed, convenience, stability, and environmental sustainability. A bi-objective optimization model was developed to balance the cost of the logistics with the benefits of high-speed rail operators to achieve a win–win situation. The model is solved by the TOPSIS method, and its effectiveness is verified by the freight case of the Zhengzhou–Chongqing high-speed railway in China. The results of this study showed that (1) HSR has advantages in medium-distance freight transportation; (2) increasing government subsidies can help improve the market competitiveness of high-speed rail in freight transportation. This research provides theoretical foundations and methodological support for optimizing HSR freight pricing mechanisms and improving multimodal transport efficiency. Full article

The market share of Last-Mile Delivery Robots (LMDRs) has grown rapidly over the past few years. These robots are mostly autonomous and supported remotely by human operators. As part of a broader shift toward sustainable urban logistics, LMDRs are seen as a promising low-emission alternative to conventional delivery vehicles. While there is a large body of literature about the technology, little is known about the real-world experiences of operating these robots. This study investigates the operational challenges faced by remote operators (ROs) of LMDRs, aiming to enhance their efficiency and safety. Through interviews with industry professionals, we explore the scenarios requiring human intervention, the strategies employed by ROs, and the unique challenges they encounter. Our findings not only identify key intervention scenarios but also provide a thorough examination of the teleoperation ecosystem, operational workflows, and how they affect the ways the ROs manage their interactions with robots. We found that ROs’ involvement varies from monitoring to active intervention to support the robots in completing their tasks when they face connectivity issues, blocked routes, and various other interruptions on their journeys. The findings highlight the importance of intuitive user interfaces (UIs) and decision-support systems to reduce cognitive load and improve situational awareness. This research contributes to the literature by offering a detailed examination of real-world teleoperation practices and focusing on the human factors influencing LMDR scalability, sustainability, and integration into future-ready logistics systems. Full article

The Greek islands have been blessed with excellent wind potential, with hundreds of sites featuring annual average wind velocity higher than 8–10 m/s. Due to specific regulations in the legal framework, some GWs of wind parks have been submitted since the late 2000s by a small number of large investors in the Greek islands, favoring the creation of energy monopolies and imposing serious impacts on natural ecosystems and existing human activities. These projects have caused serious public reactions against renewables, considerably decelerating the energy transition. This article aims to summarize the legal points in the Greek framework that caused this distorted approach and present the imposed potential social and environmental impacts. Energy monopolies distort the electricity wholesale market and lead to energy poverty and a low standard of living by imposing higher electricity procurement prices on the final users. The occupation of entire insular geographical territories by large wind park projects causes important deterioration of the natural environment, which, in turn, leads to loss of local occupations, urbanization, and migration by affecting negatively the countryside life. Serious concerns from the local population are clearly revealed through an accomplished statistical survey as well as a clear intention to be engaged in future wind park projects initiated by local stakeholders. The article is integrated with specific proposed measures and actions toward the rational development of renewable energy projects. These refer mainly on the formulation of a truly supportive and just legal framework aiming at remedying the currently formulated situation and the strengthening of the energy communities’ role, such as through licensing priorities, funding mechanisms, and tools, as well as additional initiatives such as capacity-building activities, pilot projects, and extensive activation of local citizens. Energy communities and local stakeholders should be involved in the overall process, from the planning to the construction and operation phase. Full article

This study investigates how the timing of self-employment relative to first childbirth shapes long-term entrepreneurial outcomes among Israeli mothers. Drawing on rich administrative panel data from the Israeli National Insurance Institute (N = 73,141 woman-years), we follow a cohort of women who gave birth for the first time in 2010, tracking their employment trajectories over 15 years (2005–2019). Using random-effect logistic regressions, OLS models, and fixed subgroup analyses, this study compares women who entered self-employment before childbirth with those who did so afterward. The results reveal that postnatal entrants are more likely to operate smaller businesses and exit self-employment earlier, yet often earn higher income from wage employment, compared to their prenatal counterparts. By tracing these outcomes over time, this study demonstrates how key life events, such as childbirth, structure women’s employment paths and contribute to differentiated patterns of labor market participation. Situated in a context of near-universal motherhood and limited public support for working parents, the findings offer insight into the dynamic links between family formation, employment timing, and entrepreneurial sustainability. By adopting a life-course perspective, this study demonstrates how the sequencing of family and employment transitions intersect to shape access to economic resources and entrepreneurial sustainability. Full article

The aim of this study was to provide information on post-harvest losses (PHLs) along the main value-added chains in the soybean industry, and on farmers’ strategies for reducing these losses in Benin. Data were collected using a subjective method (questionnaires) from 152 direct actors in the soybean value chain and an objective method (technological monitoring using technological monitoring sheets) from 27 processing units using a two-stage sampling technique in eighteen of the country’s municipalities. The data were analyzed using descriptive statistics. The results revealed that post-harvest losses in soybean value chains ranged from 0.03% to 7.98%. The highest loss percentages were 7.98% (production), 10.0% (processing), and 4.27% (marketing), and were obtained during the subjective measurements. The link most affected by PHL was the production link. These losses were mainly observed during threshing, winnowing, sorting, and harvesting operations. The main causes of these losses were poor mechanization and a lack of skills for post-harvest operations. The main strategies developed by players to cope with this situation remained traditional (timely harvesting, use of appropriate equipment, and good storage practices). However, additional efforts in terms of infrastructure, adapted subsidies/credits, and recruitment of specialists are needed to mechanize the operations most sensitive to losses and to reinforce the capacities of agricultural actors in order to considerably reduce post-harvest losses. Full article

Facing the widespread cooperation among different agribusiness entities in China, this study explores the impact mechanism of land scale on farmers’ cooperation with new agricultural business entities (abbreviated as NABEs), including family farms, cooperatives, and agribusinesses. The effects of income within the cooperation mechanism are further analyzed. Based on survey data from 1558 farmers in 10 provinces, applying binary Logit regression and mediation effect models, the study finds the following: (1) The current land area, past growth of land, and future willingness to expand land all positively affect farmers’ cooperation with new agricultural business entities; (2) An inverted U-shaped relationship exists between land size and the proportion of farmers joining new agricultural business entities. The probabilities of joining family farms, cooperatives, and agribusinesses peak at land sizes of 2.65, 6.82, and 7.04 acres, respectively; (3) The current income situation has an intermediary effect on the cooperation between farmers and family farms, while the future income expectation has an intermediary effect on the cooperation between farmers and cooperatives and agribusinesses; (4) The effect of land scale on cooperation is more significant for farmers of village officials or agricultural organization members, full-time farmers, and those with green production and modern sales. This study proposes a development growth curve of farmers, which can be divided into “self-development–cooperation–transformation” stages, and gives solutions for each stage, to facilitate moderate-scale operations and long-term cooperation among various entities in the context of market reforms and social division of labor. Full article

In the context of the rapid evolution of digital technology and the growing demand for user-centered services, the question of how to effectively implement marketing strategies in libraries has become important in research. This article introduces the theoretical background and development process of domestic and international research on library marketing in the digital era, systematically combs through the current situation of domestic library marketing research, and puts forward the existing deficiencies and problems. Based on the discovery of library marketing strategy research insufficiency and other problems, this paper uses STP theory (segmentation, targeting, and positioning) to conduct a systematic strategy analysis of library operation and management and puts forward countermeasure suggestions for the cross-integration of disciplines, the improvement and optimization of the new theory of library marketing, the integration of STP theory and public library strategy, and the innovation of the research direction. Full article

Poland is a country rich in mineral resources with a diversified resource base. Energy resources play a key role, as they are strategic resources ensuring the country’s energy security. Strategic resources, the recovery of which is highly risky and the possibilities of substitution are small, are critical resources for the Polish economy. These are the resources included in the list of critical resources for the European Union. The conducted review of mineral resources in Poland showed a large difference between the levels of actual resources and the resources of deposits. Therefore, supporting the mineral resources market is one of the key strategic areas of the Polish economy. This study aims to identify barriers that have a significant impact on the activities of entities in the raw materials sector. The tool used was the PESTEL analysis of companies operating in the raw materials sector. The aim of this study based on the assessment of experts familiar with the raw materials market and dealing with its challenges was to determine the main factors driving the raw materials market. These include the EU’s decarbonization policy, a complex system and relatively high level of taxes, a lack of qualified specialists, a market delay in terms of technological development, an environmental policy focused on a circular economy and renewables, and the problem of raw material depletion. The earlier identification of the market gap in the mineral resources industry in Poland in terms of business development opportunities indicated that IT and ICT would be possible directions of development. Therefore, an analysis of the industry was carried out in terms of business development opportunities. An assessment of the impact of individual factors on the activities of IT entities in the raw materials sector in Poland was carried out. The factors that most determine running a business in the diagnosed IT gap in the RM include a lack of government support for IT investments, new trends resulting from the growing importance of ICT in everyday life, the pandemic situation and the subsequent crisis of many companies on the market, the unstable financial condition of the main customer groups, and the lack of qualified personnel, equipment, and appropriate technology. The presented results may have practical implications, among others, for new economic players who want to establish their companies and conquer the raw materials market. On the one hand, they indicate opportunities, and on the other, they point to threats that may appear in their business life. Full article

Unitised integration is a management model used to address the fragmentation of multiple management entities in complex environments. Small- and medium-sized enterprise (SME) safety alliances play an important role in centralised management and cost reduction in the safety management of SMEs, which are large in number, widely distributed, and small in volume. On the basis of the investigation and analysis of the current situation of SMEs’ own safety management and external supervision, as well as the market situation of safety service institutions, this paper explores the fragmentation problem of SMEs’ safety management. An idealised framework for the unitised integration of safety management in SMEs is proposed theoretically, and the model is tested and its limitations are discussed through a field investigation of the operational mechanism and problems of the SME Safety Alliance in Pukou District, Nanjing City, China, taking the SME safety alliance as a case study, with a view to proposing policy recommendations for the optimisation and promotion of the model. The unitised integration of safety management can help promote the adaptation of safety service supply and demand, thereby reducing the cost of safety management for SMEs, promoting the effective implementation of the main responsibility for safety, alleviating the pressure of production safety supervision, and ultimately promoting the further improvement of safety supervision and management systems for SMEs. Full article

To solve the problems of s arehigh operating costs and excessive electricity consumption of cascade water supply pump stations in large-scale water transfer projects, this paper develops three optimized operation models for pump station group. Model 1 aims to minimize the daily total electricity cost, Model 2 aims to minimize the daily total electricity consumption, and Model 3 considers both time-of-use electricity prices and regulation and storage of canal section. The dynamic programming algorithm was employed to solve the optimized models. Taking the cascade pump station group of the Yellow River to Qingdao Water Regulation Project in China as an example, application research was conducted under average daily pumping flow of 8 m³/s; 16 m³/s; 24 m³/s; and 32 m³/s. Results indicate that all models exhibit excellent economic performance. Among them, the best performance was achieved by the Model 3 scenario, which consumed 98,700 kWh, 195,600 kWh, 293,400 kWh, and 394,500 kWh of electricity, and reduced the operating costs by 37,100, 38,100, 34,300, and 4400 USD, respectively, compared with the fixed-flow condition. Full article

The main aim of this article is to evaluate how well sustainable HRM practices support organizational sustainability and staff resilience during crises. This paper examines how responses to COVID-19 and geopolitical concerns have affected the HRM practices of Lithuanian logistics enterprises. This study employed a qualitative research approach, conducting semi-structured interviews with twelve HR managers from prominent logistics companies in Lithuania. The participants selected guaranteed industry-relevant insights due to their experience with HRM crisis management. Using Braun and Clarke’s approach, data were thematically analyzed to find notable HRM projects supporting workforce sustainability under crisis conditions. The findings identify three key HRM methods required for crisis resilience: strategic workforce flexibility, employee well-being and resource conservation, and long-term organizational resilience. The findings show that organizations that implemented flexible work rules, mental health support programs, and digital HRM solutions had higher employee retention and operational continuity. This study also incorporates the resource-based view (RBV) and conservation of resources (COR) theories, underlining the need for sustainable human resource management techniques as both a competitive economic resource and a psychological buffer for employees in crisis situations. This study makes actionable HRM recommendations to help firms establish organized crisis response HRM frameworks, with a focus on flexible workforce management, mental health interventions, and proactive digitization tactics. These results can be used by policymakers and business leaders to institutionalize HRM crisis-ready strategies, thus enhancing labor market stability in challenging environments. This paper contributes to the body of knowledge on HRM crisis management by suggesting a disciplined HRM crisis response model combining actual data from the logistics industry with theoretical points of view. This paper provides a useful road map for HR managers wishing to create strong staff management strategies in difficult times. Full article

One of the main challenges as the market for fully commercial electrified vehicles quickly expands is predicting the electromagnetic interference (EMI) in traction voltage systems (TVSs) in differential mode (DM) and common mode (CM). The number of subsystems connected to vehicle TVSs is increasing, and thus, so are the electromagnetic compatibility (EMC) requirements. These requirements should make sure that neither the function nor lifetime of any source or load is affected by another, but experience shows that they are often insufficient. The purpose of this article is to show how circuit simulations can complement these requirements and that a generalized artificial network/line impedance stabilization network (LISN) is insufficient to correctly predict the EMI situation of a real vehicle. This article presents a method for complexity reduction in TVS DM simulations and a comparison with the usage of LISN to predict the EMI between subsystems; the article also addresses how to mitigate the EMI with DM filters for the subsystems. The proposed method creates a foundation for a faster and safer development process. The simulation model’s development includes a traction battery and TVS subsystems. It is found that a standardized LISN does not reflect the behavior of a commercial TVS and cannot be used solely to judge if a subsystem will operate as intended within a TVS without creating EMI. A change in switching frequency in the DUT can cause severe resonance between TVS subsystems, but this is not seen with a LISN. The conclusion of the article is that LISN can provide a false sense of security and that calibrated simulation models of a complete TVS are necessary to predict the behavior in that TVS; this study also highlights the importance of using DM filters to ensure protection against resonance frequencies. Full article

This study addresses the need for a comprehensive analysis of the demand for qualified personnel in Spain’s hotel accommodation sector, situating the issue within a context of increasing demand for specialized and highly personalized services in the tourism industry. The objective of this research is to develop a theoretical framework and conduct a preliminary assessment of a model designed to identify and quantify the need for skilled professionals across hotels of different categories and locations. This model considers key factors such as seasonality, required technical competencies, and labour market demands in the tourism sector. The methodology employed combines quantitative and qualitative data analysis from multiple sources, including prior studies, surveys of human resources managers, a review of the academic literature on human resource assessment models in the hotel industry, and a validation survey. Preliminary findings indicate a significant shortage of professionals with advanced expertise in critical areas such as operations management, multilingual customer service, and process digitalization, highlighting the urgent need for a strategic approach to training and talent retention. The conclusions emphasize the importance of adapting workforce planning to the specific demands of Spain’s hotel sector while drawing comparative insights from models in France and the United States. This study proposes strategies to enhance the sector’s competitiveness and sustainability in an increasingly globalized market. Full article

Manufacturing supply chains are becoming increasingly complex due to geopolitical issues, globalization, and market demand uncertainties. These challenges lead to logistics disruptions, inventory shortages, and interruptions in raw materials and spare parts production, resulting in delayed delivery, reduced market share, and lower customer satisfaction. Effective supply chain management is critical for improving operational efficiency and competitiveness. This paper proposes a supply chain digital twin methodology to enhance operational efficiency through real-time monitoring, analysis, and response to disruptions. This methodology defines a supply chain digital twin system architecture and outlines the operational process of digital twin applications. It introduces two key modules: a digital twin module for prediction and monitoring and an optimization module for determining the optimal movement of products. These modules are integrated to align digital simulations with real-world supply chain operations. The proposed approach is validated through a case study of an automobile body production company’s supply chain, demonstrating its effectiveness in reducing inventory and logistics costs while providing countermeasures for abnormal situations. Full article

Security checks are essential for ensuring the safe operation of the regional power grid (RPG) and the smooth functioning of the electricity spot market (ESM). Currently, China’s RPG operating environment encompasses a complex mix of centralized ESM, decentralized ESM, and planned power generation. This complexity has led to increasingly severe RPG congestion issues. To address this, this paper introduces a security check mechanism design and operational optimization approach tailored for RPGs in complex markets, with a focus on congestion management. Firstly, the paper elaborates on the practical foundations, unique constraints, and requirements for security checks and congestion management during the RPG’s operational mode transitions. Secondly, it outlines the principles underlying the security check mechanism and presents a framework for RPG security checks and congestion management. Through a comparative analysis of three different programs, including their advantages, disadvantages, and applicable scenarios, the paper provides an optimal program recommendation. Building on this, the paper develops an operational optimization method that incorporates congestion management for each of the three security check and congestion management programs. Lastly, an IEEE-39 node test system is simulated to validate the effectiveness of the proposed programs. The mechanism and simulation analysis results show that Program 3, based on market mechanisms, has theoretical and practical advantages over Program 1 (based on multiple adjustments) and Program 2 (based on dispatch plans) for congestion management. Under the same line congestion situation, Program 1 requires two adjustments to relieve the line congestion, while Program 2 and Program 3 can solve the problem with just one optimization adjustment, and the congestion management effect of Program 3 is more obvious and superior. Full article