Determinants of consumers’ intentions to share knowledge and intentions to purchase on s-commerce sites: incorporating attitudes toward persuasion attempts into a social exchange model

This research explores s-commerce users’ intentions to purchase and to share knowledge by incorporating ‘attitudes toward persuasion attempts,’ ‘ease of use,’ and ‘perceived usefulness’ into a social exchange theory model. A survey using an on-site purposive sampling technique was used to recruit the respondents, and an interception technique was used to approach the consumers. A total of 471 Korean consumers participated in this research. Based on 471 Korean social-commerce users, our results reveal that social exchange belief factors and a site’s usability affect user satisfaction, which subsequently affects users’ intentions to purchase and to share knowledge. In addition, attitudes toward persuasion attempts moderate the effect of satisfaction on users’ purchase intentions. Keywords: social exchange theory, attitudes toward persuasion attempts, intention to share knowledge, social exchange belief

Learning from multimedia and hypermedia

Computer-based multimedia and hypermedia resources (e.g., the world wide web) have become one of the primary sources of academic information for a majority of pupils and students. In line with this expansion in the field of education, the scientific study of learning from multimedia and hypermedia has become a very active field of research. In this chapter we provide a short overview with regard to research on learning with multimedia and hypermedia. In two review sections, we describe the educational benefits of multiple representations and of learner control, as these are the two defining characteristics of hypermedia. In a third review section we describe recent scientific trends in the field of multimedia/hypermedia learning. In all three review sections we will point to relevant European work on multimedia/hypermedia carried out within the last 5 years, and often carried out within the Kaleidoscope Network of Excellence. According to the interdisciplinary nature of the field this work might come not only from psychology, but also from technology or pedagogy. Comparing the different research activities on multimedia and hypermedia that have dominated the international scientific discourse in the last decade reveals some important differences. Most important, a gap seems to exist between researchers mainly interested in a “serious” educational use of multimedia/ hypermedia and researchers mainly interested in “serious” experimental research on learning with multimedia/hypermedia. Recent discussions about the pros and cons of “design-based research” or “use-inspired basic research” can be seen as a direct consequence of an increasing awareness of the tensions within these two different cultures of research on education

EPIdemiology of Surgery-Associated Acute Kidney Injury (EPIS-AKI) : Study protocol for a multicentre, observational trial

More than 300 million surgical procedures are performed each year. Acute kidney injury (AKI) is a common complication after major surgery and is associated with adverse short-term and long-term outcomes. However, there is a large variation in the incidence of reported AKI rates. The establishment of an accurate epidemiology of surgery-associated AKI is important for healthcare policy, quality initiatives, clinical trials, as well as for improving guidelines. The objective of the Epidemiology of Surgery-associated Acute Kidney Injury (EPIS-AKI) trial is to prospectively evaluate the epidemiology of AKI after major surgery using the latest Kidney Disease: Improving Global Outcomes (KDIGO) consensus definition of AKI. EPIS-AKI is an international prospective, observational, multicentre cohort study including 10 000 patients undergoing major surgery who are subsequently admitted to the ICU or a similar high dependency unit. The primary endpoint is the incidence of AKI within 72 hours after surgery according to the KDIGO criteria. Secondary endpoints include use of renal replacement therapy (RRT), mortality during ICU and hospital stay, length of ICU and hospital stay and major adverse kidney events (combined endpoint consisting of persistent renal dysfunction, RRT and mortality) at day 90. Further, we will evaluate preoperative and intraoperative risk factors affecting the incidence of postoperative AKI. In an add-on analysis, we will assess urinary biomarkers for early detection of AKI. EPIS-AKI has been approved by the leading Ethics Committee of the Medical Council North Rhine-Westphalia, of the Westphalian Wilhelms-University Münster and the corresponding Ethics Committee at each participating site. Results will be disseminated widely and published in peer-reviewed journals, presented at conferences and used to design further AKI-related trials. Trial registration number NCT04165369

Healthcare Engineering Defined: A White Paper

Engineering has been playing an important role in serving and advancing healthcare. The term "Healthcare Engineering" has been used by professional societies, universities, scientific authors, and the healthcare industry for decades. However, the definition of "Healthcare Engineering" remains ambiguous. The purpose of this position paper is to present a definition of Healthcare Engineering as an academic discipline, an area of research, a field of specialty, and a profession. Healthcare Engineering is defined in terms of what it is, who performs it, where it is performed, and how it is performed, including its purpose, scope, topics, synergy, education/training, contributions, and prospects

EXPERIMENTAL PERFORMANCE EVALUATION OF COMBI-HEATERS WITH DIFFERENT HEAT

In this study, characteristics of three different combi-heaters and heat exchangers were experimentally investigated. All combi-heaters tested have similar technical specifications and have almost the same heat load. Main difference among the combi-heaters is the type of heat exchanger used. Tests were performed for combi heaters containing a combined heat exchanger (K1), a flat plate heat exchanger (K2), double heat exchanger (K3). The objective of this study is to determine the performance of all combi heaters and to determine the benefits and advantages of K1. Performance of all combi heaters were investigated for the heating cycle, domestic water cycle with and without the heating cycle in use, and similarly heating cycle with domestic water in use and finally for different mass flow rates. According to the results of different and parametric experiments for performance evaluation, for the combi heater with combined heat exchanger (K1), advantages in heat transfer characteristics have been detected compared to the other two combi-heaters tested

Experimental performance evaluation of combi-heaters with different heat exchanger unit

In this study, characteristics of three different combi-heaters and heat exchangers were experimentally investigated. All combi-heaters tested have similar technical specifications and have almost the same heat load. Main difference among the combi-heaters is the type of heat exchanger used. Tests were performed for combi heaters containing a combined heat exchanger (K1), a flat plate heat exchanger (K2), double heat exchanger (K3). The objective of this study is to determine the performance of all combi heaters and to determine the benefits and advantages of K1. Performance of all combi heaters were investigated for the heating cycle, domestic water cycle with and without the heating cycle in use, and similarly heating cycle with domestic water in use and finally for different mass flow rates. According to the results of different and parametric experiments for performance evaluation, for the combi heater with combined heat exchanger (K1), advantages in heat transfer characteristics have been detected compared to the other two combi-heaters tested

jet

Thermal control of electronic components is a continuously emerging problem as power loads keep increasing. The present study is mainly focused on experimental and numerical investigation of impinging jet cooling of 18 (3 x 6 array) flash mounted electronic components under a constant heat flux condition inside a rectangular channel in which air, following impingement, is forced to exit in a single direction along the channel formed by the jet orifice plate and impingement plate. Copper blocks represent heat dissipating electronic components. Inlet flow velocities to the channel were measured by using a Laser Doppler Anemometer (LDA) system. Flow field observations were performed using a Particle Image Velocimetry (PIV) and thermocouples were used for temperature measurements. Experiments and simulations were conducted for Re 4000 8000 at fixed value of H 10 x D-h. Flow field results were presented and heat transfer results were interpreted using the flow measurement observations. Numerical results were validated with experimental data and it was observed that the results arc in agreement with the experiments

and the risk of sudden infant death syndrome in Turkey

Objective: The purpose of this article is to determine nurses' and paediatricians' knowledge regarding the sleeping positions and environment of infants.Methods: This descriptive and cross-sectional study was conducted at 18 randomly selected hospitals in eight different cities in Turkey. There were 1,156 participants in the study (252 physicians and 904 nurses). The data were collected by means of a questionnaire form developed by the investigators. Data analysis included percentage and chi-square analyses.Results: Among the nurses, 74.1% were between the ages of 21 and 35, 32.0% had a bachelor's degree, 65.0% had job experience of six years or more. Among the paediatricians, 69.0% were between the ages of 21 and 35; 42.5% had job experience of six years or more. 88.8% of the nurses said that the mother should share same room with the infant but in a separate bed. Over two-thirds of the nurses said that a pillow should not be used when an infant was asleep, and 98.0% would not cover an infant's face. 86.5% of the paediatricians said that the mother could share same room with the infant but in a separate bed. 76.2% of the paediatricians said that they would not use a pillow when the infant were asleep, and 97.2% would not cover an infant's face. Most nurses and physicians responded that infants of 0-6 months of age slept on their sides during the daytime, in the nighttime, when left alone in a room, and after feeding. 140Conclusions: The results showed that physicians and nurses were not sufficiently knowledgeable about infant sleeping positions; however, they had sufficient knowledge about the risk factors for sudden infant death syndrome. The education of both nurses and physicians working in pediatric wards about the risk factors of SIDS may decrease SIDS deaths in Turkey

and the risk of sudden infant death syndrome in Turkey

Objective: The purpose of this article is to determine nurses' and paediatricians' knowledge regarding the sleeping positions and environment of infants.Methods: This descriptive and cross-sectional study was conducted at 18 randomly selected hospitals in eight different cities in Turkey. There were 1,156 participants in the study (252 physicians and 904 nurses). The data were collected by means of a questionnaire form developed by the investigators. Data analysis included percentage and chi-square analyses.Results: Among the nurses, 74.1% were between the ages of 21 and 35, 32.0% had a bachelor's degree, 65.0% had job experience of six years or more. Among the paediatricians, 69.0% were between the ages of 21 and 35; 42.5% had job experience of six years or more. 88.8% of the nurses said that the mother should share same room with the infant but in a separate bed. Over two-thirds of the nurses said that a pillow should not be used when an infant was asleep, and 98.0% would not cover an infant's face. 86.5% of the paediatricians said that the mother could share same room with the infant but in a separate bed. 76.2% of the paediatricians said that they would not use a pillow when the infant were asleep, and 97.2% would not cover an infant's face. Most nurses and physicians responded that infants of 0-6 months of age slept on their sides during the daytime, in the nighttime, when left alone in a room, and after feeding. 140Conclusions: The results showed that physicians and nurses were not sufficiently knowledgeable about infant sleeping positions; however, they had sufficient knowledge about the risk factors for sudden infant death syndrome. The education of both nurses and physicians working in pediatric wards about the risk factors of SIDS may decrease SIDS deaths in Turkey