Search Results (90)

Empowered by artificial intelligence and 5G technologies, intelligent messaging service instead of the existing short messaging service could provide an omni-channel service, thus achieving higher interconnection for mobile users. In this paper, we adopted mixed methods research and explored the psychological factors that affect adoption intention to adopt intelligent messaging services among mobile users based on self-determination theory. After semi-structured interviews, we constructed a partial least squares structural equation model from the perspectives of intrinsic and extrinsic motivations. In addition, openness and perceived complexity were also introduced as an extended dimension. Through an online survey, 548 valid questionnaires were obtained. The results show that intrinsic motivation has a greater effect on adoption intention. Specifically, attitude, perceived autonomy, perceived relatedness, and perceived system quality have significant positive impacts on the adoption intention of intelligent messaging, while perceived complexity has a negative direct impact on adoption intention. Although perceived competence and perceived media richness have no significant effects on adoption intention, an indirect effect on adoption intention through attitude was observed. Notably, perceived interactivity and openness have no effect on adoption intention. Through this study, we aim to provide guidance for developers to focus on mobile users’ psychological needs regarding upgraded interactive channels, which can accelerate the construction of an omni-channel media environment. Full article

Taking into account retailers’ resistance and operational costs, manufacturer enterprises are facing the optimal decision-making problem of whether and what kind of direct sales channels to open. Meanwhile, against the backdrop of asymmetric demand information, how does retailers’ information sharing affect manufacturers’ channel selection? Based on this, this study considers three types of sales channels for manufacturers in the context of asymmetric demand information: a traditional channel, online direct sales channel, and subsidiary direct sales channel. Six supply chain game models are established under the retailer’s information strategy, and the manufacturer’s channel-selection decision and the retailer’s information-sharing decision are analyzed. The study demonstrates that when information is shared, the online direct sales channel represents the optimal choice. Conversely, when information sharing is absent, the manufacturer will select the subsidiary direct channel when the subsidiary sales channel opening cost is minimal, and the unit direct selling cost of online direct sales channels is moderate. Furthermore, we discover that retailers lack motivation to share demand information. Therefore, we propose an information-sharing incentive system to encourage retailers to voluntarily share information with manufacturers, aiming for Pareto optimization in the supply chain. Full article

The growing reliance on digital banking and financial transactions has brought significant security challenges, including data breaches and unauthorized access. This paper proposes a robust method for enhancing the security of banking and financial transactions. In this context, steganography—hiding information within digital media—is valuable for improving data protection. This approach combines biometric authentication, using face and voice recognition, with image steganography to secure communication channels. A novel application of Fibonacci sequences is introduced within a direct-sequence spread-spectrum (DSSS) system for encryption, along with a discrete wavelet transform (DWT) for embedding data. The secret message, encrypted through Fibonacci sequences, is concealed within an image and tested for effectiveness using the Mean Square Error (MSE) and Peak Signal-to-Noise Ratio (PSNR). The experimental results demonstrate that the proposed method achieves a high PSNR, particularly for grayscale images, enhancing the robustness of security measures in mobile and online banking environments. Full article

This paper analyzes how consumer preferences for eco-friendly private labels affect platform selling formats and manufacturer channel strategies. We construct a game-theoretic model that encompasses both an e-commerce platform and a manufacturer. In this model, the platform chooses its selling format—either wholesale or agency—while the manufacturer determines whether to launch an online direct channel. Our analysis takes into account consumer preferences for both product brands and sales channels. We compare and analyze the equilibrium outcomes across four different scenarios, leading to the following conclusions: (1) When the platform utilizes the wholesale selling format, the manufacturer is consistently motivated to launch the direct channel if the costs associated with it are low. Conversely, when the platform employs the agency selling format, the manufacturer’s decision to establish an online direct marketing channel depends on the relative strength of consumers’ eco-friendly and channel preferences. (2) The platform’s choice of selling format is affected by the manufacturer’s channel strategy, leading the platform to modify its selling format based on varying manufacturer channel approaches. (3) The choices of the platform’s selling format and the manufacturer’s channel strategy are not always in conflict. When consumer preferences for the manufacturer’s direct channel are strong and the cost of introducing it is moderate, the platform’s decision to adopt the agency selling format can create a win-win outcome for both the platform and the manufacturer. And the establishment of online channels by manufacturers further enhances the sustainable growth of eco-friendly products. Full article

Against the backdrop of an increasingly sound supply chain system and thriving e-commerce, it is becoming increasingly common for retailers to introduce their own brands of products and for manufacturers to open up direct online sales channels. The existence of these two supply chain decisions is complex and involves interactions. Moreover, the introduction of online direct sales channels will bring about differences in prices and service quality between channels, resulting in a free-riding effect on the internet. However, existing related research rarely considers the role of network free-riding effect in this supply chain system. This article integrates the network free-riding effect into the supply chain model by setting the network free-riding rate. According to whether retailers introduce their own brand products and manufacturers open up online direct sales channels, four supply chain scenarios are formed, and the reverse recursion method is used to obtain the profit functions for each of these four scenarios. Then, a Stackelberg game model is established to determine the response strategies of manufacturers and retailers based on the changes in profits of manufacturers caused by retailer decisions and the changes in profits of retailers caused by manufacturer decisions. Through analysis, it was discovered that a key factor affecting decision-making within the supply chain system is the retailer’s channel advantage. When the channel advantage of retailers is strong, manufacturers will open up online direct sales channels to weaken the channel advantage of retailers. Retailers will not introduce their own brand products but are more inclined to cooperate with manufacturers. When the channel advantage of retailers is weak, retailers will attract consumers and consolidate their channel advantage by introducing high-quality, low-priced private label products, while manufacturers will maintain cooperation with retailers and adopt a strategy of not opening up online direct sales channels. We also analyzed the Nash equilibrium state under different channel advantages of retailers. Full article

Background: Social media platforms have become increasingly influential channels for discussing various aspects of children’s health, including dietary habits and food choices. This research explores the impact of social media on childhood dietary habits regarding the foods children consume by analyzing published findings about online videos and other social media platforms. Methods: From a pool of 9646 articles available on Google Scholar, Science Direct, Web of Science, and ProQuest, 25 were selected for inclusion in this systematic literature review after meeting the qualifying criteria. The screened papers contained clinical studies, cross-sectional studies, and editorials published in English. Results: A review of these articles revealed that individuals’ communication with friends via social media significantly enhanced their comprehension of conversations related to weight management. The results of this research inform efforts to combat poor diets and promote overall well-being among children at an earlier stage when personal interactions are likely limited. To promote the healthy growth of children, it is essential that the videos they engage with offer them appropriate guidance on maintaining a nutritious diet. Ultimately, this research provides insights into how social media creates environments conducive to the well-being of children. Conclusions: As a result, social media can serve as a valuable resource to help mitigate the prevalence of obesity in this vulnerable population. Full article

The rise of rural e-commerce, accelerated by the COVID-19 pandemic, has driven agricultural development, resulting in a dual-channel model that combines offline supermarket docking with online e-commerce direct sales. Furthermore, given the perishable nature of most agricultural products, consumers exhibit a preference for high-quality logistics services. This paper analyses the dynamics of the agricultural supply chain, beginning with the “leading enterprises + farmers” production mode, and establishes two optimal decision-making models for online and offline dual-channel agricultural supply chains, incorporating logistics service levels. The first model considers centralised decision-making, where leading agricultural producers and community superstores make decisions simultaneously, aiming to maximise the overall profit of the supply chain. The second model addresses decentralised decision-making in which the producer, as the dominant player in a Stackelberg game, anticipates the reactions of retailers and sets the wholesale price, online sales price, and online logistics service level accordingly. Retailers, as followers, then determine the offline sales price and offline logistics service level based on the producer’s decisions. Finally, we conduct a sensitivity analysis of the proposed models. Our findings reveal that as consumer focus on logistics service levels increases, the overall profit of the supply chain improves, and as the unit logistics cost corresponding to the level of logistics service increases, the marginal benefits of decreasing profit brought about by the increase in unit logistics cost also decrease. Full article

Low fluxes of astrophysical neutrinos at TeV energies, and the overwhelming background of atmospheric neutrinos below that, render the current paradigm of neutrino astronomy a severely statistics-limited one. While many hints have emerged, all the evidence gathered by IceCube and ANTARES, over the course of almost a decade and a half of operation, has fallen short of providing any conclusive answer to the puzzle of the origin of high-energy cosmic rays and neutrinos. The advancement of the field is thus closely associated with not only the neutrino observatories coming online in the next few years, but also on the coordinated efforts of the EM, GW and cosmic ray communities to develop dedicated channels and infrastructure that allow for the swift and comprehensive multi-messenger follow-up of relevant events detected in any of these sectors. This paper highlights the strides that have been already taken in that direction and the fruits that they have borne, as well as the challenges that lie ahead. Full article

A major issue recurrent in sustainability ensuring concerns is pollution due to human activities, mainly related to the reduction in waste generation. The present study aims to identify students’ awareness of waste management, their daily routines in separately collecting recyclable waste, and their behaviors leading to reducing wasteful consumption in campus residential living, in a large university in the Western part of Romania, to channel the strategic plan of the university and the efforts of institutional teams dealing with the issues of waste management and sustainability. The methodology consists of an analysis of waste management in the university campus hosting around 6000 students in 16 dormitories, and of an anonymous online survey mapping the self-perceived behavior of students in solid waste management. Data from 1172 valid responses are refined through factorial analysis. While recycling behavior seems to be largely shared by the respondents, with more than 50% declaring that they always reuse recyclables, separate collection of waste is typical for only a quarter of the sample. Therefore, a vigorous intervention is needed to guide young adults’ behavior towards sustainability choices. Campus greening needs to join interventions from the university, in charge of campus life in the selected case, city administration, waste management companies, and the student body. The findings are useful to explore the possible directions for action to increase or contribute to territorial sustainability in the socio-ecological context of Timisoara, the largest university city in the western part of Romania through educational, managerial, and policy interventions, based on local partnerships and collaborations, in accordance with SDG 17. Full article

Online detection devices, powered by artificial intelligence technologies, enable the comprehensive and continuous detection of high-speed railways (HSRs). However, the computation-intensive and latency-sensitive nature of these detection tasks often exceeds local processing capabilities. Mobile Edge Computing (MEC) emerges as a key solution in the railway Internet of Things (IoT) scenario to address these challenges. Nevertheless, the rapidly varying channel conditions in HSR scenarios pose significant challenges for efficient resource allocation. In this paper, a computation offloading system model for detection tasks in the railway IoT scenario is proposed. This system includes direct and relay transmission models, incorporating Non-Orthogonal Multiple Access (NOMA) technology. This paper focuses on the offloading strategy for subcarrier assignment, mode selection, relay power allocation, and computing resource management within this system to minimize the average delay ratio (the ratio of delay to the maximum tolerable delay). However, this optimization problem is a complex Mixed-Integer Non-Linear Programming (MINLP) problem. To address this, we present a low-complexity subcarrier allocation algorithm to reduce the dimensionality of decision-making actions. Furthermore, we propose an improved Deep Deterministic Policy Gradient (DDPG) algorithm that represents discrete variables using selection probabilities to handle the hybrid action space problem. Our results indicate that the proposed system model adapts well to the offloading issues of detection tasks in HSR scenarios, and the improved DDPG algorithm efficiently identifies optimal computation offloading strategies. Full article

Background: Midwives are strong advocates for vaginal births. However, their visibility and accessibility are poorly perceived by women in Romania. Consequently, the women’s options are limited to a single direction when pregnancy occurs, involving the family doctor, the obstetrician, and often an interventional technical approach at the time of birth. The aim of this research is to identify specific variables that affect the perceptions and attitudes of pregnant women towards the care provided by midwives. This knowledge could contribute to the development of more effective education and information strategies within maternal health services. Methods: A cross-sectional observational analytical survey was conducted in Romania among pregnant women from the general population. Data were collected through a self-administered questionnaire, with informed consent obtained from each participating pregnant woman. The questionnaire was administered online using the cloud-based Google Forms platform and was available on the internet for seven months, from January to July 2023. The questionnaire was distributed through various media channels, both individually and in communication groups, in the form of a link. All questions were mandatory, and the questionnaire could only be submitted after answering all questions. Results: A total of 1301 individual responses were collected. The analysis of the socio-demographic and obstetrical profile of the pregnant women revealed that approximately half, 689 (52.95%), of the participants were aged between 18–29 years, and 1060 (81.47%) of the participants were married. Among our group of 1301 pregnant women, 973 (74.78%) had higher education, and 987 (75.86%) had a regular job. A majority of the survey participants, 936 (71.94%), lived in an urban geographic area, while 476 (36.58%) had attended childbirth education courses, and 791 (60.79%) were in the third trimester of pregnancy. A total of 298 (22.9%) respondents did not want to give birth in a hospital, and one-third, 347 (26.67%), did not place significant importance on control over the childbirth process. Conclusions: The main factors influencing women’s decisions regarding perinatal care and the importance of midwives as a component of the maternal-infant care team are modifiable, and thorough educational and psychological preparation would reduce the increasing predominance of preference for cesarean section, thereby promoting healthier and more woman- and child-centered perinatal care. Full article

In the rapidly evolving landscape of e-commerce, companies are increasingly focusing on their channel strategies to gain sustainable development. However, asymmetric demand information poses challenges to these decisions. This paper explores the interplay between a retailer’s information sharing strategy and a manufacturer’s channel strategy in a retailer-led green supply chain, where the manufacturer may establish an online channel to sell its green products directly. The dominant retailer has private demand information about the market and decides whether to share private information with the manufacturer. By establishing a game model, we analyze the impacts of information sharing and the manufacturer’s channel strategy on the payoffs for all the supply chain members, considering sustainability aspects such as the environmental benefits of green products and the efficiency of supply chain operations. The results show that information sharing benefits both the retailer and the manufacturer, irrespective of the establishment of an online channel. When the retailer shares demand information, opening an online channel benefits the manufacturer but benefits the retailer under certain conditions. Furthermore, through a numerical approach, we examine the strategic preferences of the firms and derive the equilibrium strategy. Interestingly, the manufacturer consistently prefers the scenario involving both an online channel and information sharing. The retailer’s preference, however, depends on the direct selling cost; it favors information sharing with or without an online channel based on this cost. Ultimately, our findings suggest that the equilibrium strategy can either be sharing information with an online channel or not sharing information without an online channel, which is contingent upon the direct selling cost and the forecast signal precision. These insights provide actionable strategies for enhancing the sustainability of supply chain operations. Full article

As an important way to realize the circular economy, remanufacturing faces the problem of low consumer recognition of remanufactured products. Given that factor, this study formulates a model that integrates offline direct sales with online distribution led by remanufacturers, assuming that consumers perceive differences between channels. We develop a Stackelberg game model to represent cases of remanufactured channel promotion and generic promotion and analyze the optimization of pricing and the level of promotion effort decisions for remanufactured products. Furthermore, considering the market conditions, such as the difference coefficient of consumer channel perception and the spillover effect in generic promotion, we investigate the selection of the optimal promotion strategy for remanufacturers. The research findings reveal the following: (i) Under channel promotion, the level of promotion effort and the prices of online and offline products are positively correlated with the difference coefficient of consumer value perception. Conversely, under generic promotion, the level of promotion effort and the prices of online and offline products initially decrease and then increase with the difference coefficient of consumer value perception. (ii) Under the generic promotion, the differences in prices between online and offline products are significantly smaller compared to channel promotion. (iii) The remanufacturer’s profit from channel promotion is higher when the difference in consumer channel perception is either small or large. Conversely, when the difference in consumer channel perception is moderate, the optimal strategy for remanufacturers is generic promotion, thereby achieving a mutually beneficial outcome with retailers. This study provides a theoretical foundation for remanufacturers to formulate effective pricing and promotion strategies in dual-channel marketing, thereby enhancing the market recognition and sales of remanufactured products. Full article

The power transformer is one of the most crucial pieces of high-voltage equipment in the power system, and its stable operation is crucial to the reliability of power transmission. Partial discharge (PD) is a key factor leading to the degradation and failure of the insulation performance of power transformers. Therefore, online monitoring of partial discharge can not only obtain real-time information on the operating status of the equipment but also effectively predict the remaining service life of the transformer. Meanwhile, accurate localization of partial discharge sources can assist maintenance personnel in developing more precise and efficient maintenance plans, ensuring the stable operation of the power system. Dual partial discharge sources in transformer oil represent a more complex fault type, and piezoelectric transducers installed outside the transformer oil tank often fail to accurately capture such discharge waveforms. Additionally, the sensitivity of the built-in F-P sensors can decrease when installed deep within the oil tank due to the influence of oil pressure on its sensing diaphragm, resulting in an inability to accurately detect dual partial discharge sources in transformer oil. To address the impact of oil pressure on sensor sensitivity and achieve the detection of dual partial discharge sources under high-voltage conditions in transformers, this paper proposes an optical fiber ultrasonic sensor with a pressure-balancing structure. This sensor can adapt to changes in oil pressure environments inside transformers, has strong electromagnetic interference resistance, and can be installed deep within the oil tank to detect dual partial discharge sources. In this study, a dual PD detection system based on this sensor array is developed, employing a cross-positioning algorithm to achieve detection and localization of dual partial discharge sources in transformer oil. When applied to a 35 kV single-phase transformer for dual partial discharge source detection in different regions, the sensor array exhibits good sensitivity under high oil pressure conditions, enabling the detection and localization of dual partial discharge sources in oil and winding interturn without obstruction. For fault regions with obstructions, such as within the oil channel of the transformer winding, the sensor exhibits the capability to detect the discharge waveform stemming from dual partial discharge sources. Overall, the sensor demonstrates good sensitivity and directional clarity, providing effective detection of dual PD sources generated inside transformers. Full article

As escalating environmental pollution results from economic development, the green supply chain is vital in enhancing ecological quality. In light of the rapid growth of online shopping, the dual-channel supply chain has gained significant popularity. Governments have implemented policies to achieve carbon peaks and neutrality worldwide. Considering green quality and channel preferences, this study constructs a Stackelberg model led by the manufacturer within a dual-channel supply chain to compare the effects under two government subsidy strategies. A Stackelberg game-theoretic approach is applied to analyze the model. The findings indicate the following: (1) Increases in the subsidy coefficient can increase product greenness and the overall profit in both subsidy strategies, which makes sense; (2) When direct sales channels become dominant, subsidizing the manufacturer proves superior to subsidizing the retailer in terms of promoting green quality and overall profit, which extends existing studies of government subsidy decisions. Furthermore, subsidizing the retailer may negatively affect the total supply chain profit; (3) Consistent with previous literature, intense competition between manufacturers and retailers is expected to enhance the overall profit of the supply chain; (4) Interestingly, customer preference for online channels does not influence product green quality under manufacturer subsidization strategies but exhibits a negative impact under retailer subsidization strategies. Finally, this research provides managerial implications for decision-makers and potential issues for future research. Full article