Article
Computer Science, Information Systems
A. Malathi, K. Mohamed Jasim
Summary: This study examines the relationship between service quality of medical apps, patient sensitivity, and patient experience. The findings show that the service quality of medical apps has a significant impact on patient sensitivity and patient experience, and patient experience has a strong and positive relationship with patient sensitivity.
INTERNATIONAL JOURNAL OF MEDICAL INFORMATICS
(2022)
Article
Public, Environmental & Occupational Health
An-Jin Shie, Yung-Fu Huang, Guang-Yu Li, Wen-Yi Lyu, Ming Yang, You-Yu Dai, Zhao-Hui Su, Yenchun Jim Wu
Summary: This study combines theoretical foundations of service quality and the characteristics of the hospital service industry to investigate the impact of hospital service quality on patients' perceptions of health service encounters, trust, and loyalty. The study found that higher service quality leads to increased customer trust, better service encounters, and greater doctor-patient loyalty.
FRONTIERS IN PUBLIC HEALTH
(2022)
Article
Health Care Sciences & Services
Richard Meyrat, Elaina Vivian, Jimmy Shah, Archana Sridhar, Bonnie Blake Hurst, Chris Shoup, Randall B. Graham, Stephen Katzen, Bartley Mitchell, Michael Oh, Nimesh H. Patel
Summary: Our analysis revealed weak, yet significant, negative correlations between ambulatory and hospital PG scores. This indicates that patient perception established in ambulatory and clinic settings could impact a patient's perception of their hospital experience and subsequent satisfaction scores.
Article
Environmental Sciences
Guangxia Zhang, Yanfang Liu, Ying Jing, Huiting Chen, Yiheng Wang, Zhengyu Wang
Summary: This study explores the competition and cooperation between high-speed railway (HSR) and conventional railway (CR) in 39 core cities in China. The findings indicate that HSR provides superior quality service compared to CR, but CR is more easily replaced in terms of temporal competition. The supply-service relationship reveals that HSR has become the main transportation mode between core cities, with CR showing complementary effects in terms of timing. This study can offer insights for regional spatial planning by understanding the operational strategies of the railway passenger transport system.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Review
Multidisciplinary Sciences
Taiye T. Borishade, Olaleke O. Ogunnaike, Odunayo Salau, Bolanle D. Motilewa, Joy Dirisu
Summary: High-quality services in higher educational institutions play a crucial role in satisfying students and building their loyalty. Research conducted in a private university in Nigeria shows a significant relationship between service quality and student loyalty, which is mediated by student satisfaction.
Review
Medicine, General & Internal
Adel Alabdaly, Deborah Debono, Reece Hinchcliff, Su-Yin Hor
Summary: This article describes a protocol for a scoping review of the relationship between patient safety culture and patient experience in hospital settings, aiming to provide an overview of this relationship, map key concepts, and identify research gaps. The study will follow Arksey and O'Malley's framework with five stages, as well as the Population, Concept and Context Framework for data extraction and analysis. Ethical review is not required, and results will be disseminated through publication in a peer-reviewed journal and conference presentations.
Article
Management
Yun-na Park, Taeshik Gong
Summary: Drawing on theories and models, this study examines the impact of customer engagement on different types of customer responses to service failures in the mobile application context. Data from a survey of 345 South Korean customers was analyzed using structural equation modeling. The results reveal a U-shaped relationship between customer engagement and negative responses, as well as an inverted U-shaped relationship between customer engagement and positive responses. Relationship quality strengthens the relationship between customer engagement and responses to service failures, except for loyalty. This study contributes to understanding the relationship between customer engagement and response to service failure and provides insights for marketing strategies for mobile applications.
SERVICE INDUSTRIES JOURNAL
(2023)
Article
Business
Changxu (Victor) Li, Bart Lariviere
Summary: This study examines how a service robot's personality impacts the overall service robot experience, considering individual and situational contextual factors. The findings reveal that different configurations of robot personalities can lead to positive experiences based on the individual and situational context, and the perception of warmth, competence, and discomfort. It highlights the importance of understanding the complex link between robot personality and its context for enhancing the service robot experience.
PSYCHOLOGY & MARKETING
(2023)
Article
Thermodynamics
Chenshuo Ma, Yifei Zhang, Keni Ma, Chanyun Li
Summary: Energy upgrading is crucial in rural areas for combating global climate change. The distributed utilization of biomass energy using straw briquette fuel is highly feasible, and the service scale of energy service stations plays a key role in the investment cost of distributed planning schemes. By using GIS, this study proposes an optimal layout mode for energy service stations and evaluates the investment costs for each layout mode. The results indicate that a service radius of 1 km is recommended, as it has the highest economic and environmental benefits in the long term.
Article
Cardiac & Cardiovascular Systems
P. Michael Grossman, Devraj Sukul, Shelly C. Lall, Pedro A. Villablanca, Francis Shannon, Milan Seth, Stanley J. Chetcuti, Himanshu J. Patel, G. Michael Deeb
Summary: In Michigan TVT data, patients who underwent TAVR at CSC hospitals had significantly higher rates of in-hospital post-TAVR stroke compared to non-CSC hospitals. However, CSC designation was not significantly associated with other important post-TAVR clinical outcomes, including 30-day mortality.
JACC-CARDIOVASCULAR INTERVENTIONS
(2021)
Article
Green & Sustainable Science & Technology
Karzan Ismael, Szabolcs Duleba
Summary: This study aims to explore the satisfaction attributes of private vehicle users during the COVID-19 pandemic, finding that perceived service quality and accessibility have a significant impact on the satisfaction of private vehicle users, while safety and security are less related to satisfaction. Additionally, there are significant differences in achieving satisfaction related to safety and security among different gender and age groups.
Article
Business
Sungjun S. Park, ChunTing D. Tung, Heejung Lee
Summary: The study found that consumers' psychological processes differ when adopting AI service robots in different service areas, with consumers' perception of the usefulness of AI service robots playing a significant role in influencing attitudes. Additionally, privacy concerns and trust in AI technology were identified as important factors affecting consumer decision-making across all service settings.
PSYCHOLOGY & MARKETING
(2021)
Article
Plant Sciences
Yunshan Yang, Guangzhou Liu, Xiaoxia Guo, Wanmao Liu, Jun Xue, Bo Ming, Ruizhi Xie, Keru Wang, Peng Hou, Shaokun Li
Summary: This study confirmed the quantitative relationships between grain filling parameters and photosynthetically active radiation (PAR), showing that increased PAR can enhance grain filling rate and maize yield. Additionally, different cultivars exhibited varying shade tolerance and grain filling capacity, highlighting the importance of breeding maize varieties with low light tolerance and high grain yield in response to climate change.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Psychology, Multidisciplinary
Yunhe Li, Minghua Xiong, Wei-Hsuan Chang, Ling Li
Summary: This study examines the impact of internal service recovery on internal relationship quality from the perspective of internal marketing, showing a positive and significant effect of internal service recovery on internal relationship quality; internal relationship investment and leader-member exchange positively and significantly moderate the relationship between internal service recovery and internal relationship quality. These findings provide insights for future research in organizational management.
FRONTIERS IN PSYCHOLOGY
(2021)
Article
Cell Biology
Yuan-ting Wu, Hannah C. Bennett, Uree Chon, Daniel J. Vanselow, Qingguang Zhang, Rodrigo Munoz-Castarieda, Keith C. Cheng, Pavel Osten, Patrick J. Drew, Yongsoo Kim
Summary: This study comprehensively defines the relationships between the cerebrovasculature, capillary pericytes, and different neuronal cell types using mapping methods. The results show regional variations in vasculature and pericyte densities, which correlate with energy-demanding neuronal subtypes.
Article
Chemistry, Analytical
Frank Loh, Noah Mehling, Tobias Hossfeld
Summary: LoRaWAN is a fast-growing IoT access protocol that allows users to create small sensor networks in a license-free frequency band. However, the random channel access can lead to message collisions and data loss. Therefore, alternative approaches, including a time scheduled channel access method, have been proposed.
Article
Engineering, Electrical & Electronic
Tobias Hossfeld, Anika Seufert, Frank Loh, Stefan Wunderer, John Davies
Summary: Network operators are increasingly interested in understanding and quantifying user perceived quality of experience (QoE). However, there are no QoE models available for all applications, causing industry to rely on simple but effective approaches based on expert knowledge. In this work, we analyze the usability of a threshold-based QoE concept as an estimation methodology for industry.
IEEE COMMUNICATIONS MAGAZINE
(2023)
Article
Computer Science, Information Systems
Frank Loh, Noah Mehling, Stefan Geissler, Tobias Hossfeld
Summary: Low Power Wide Area Networks (LoRaWANs) are a promising solution for future IoT deployments due to their low energy requirements and long battery lifetimes. However, the technology is limited by low throughput rates and the unreliable nature of LoRa. To address these challenges, we propose a novel graph-based gateway placement approach that reduces collision probability and the number of required gateways. We also overcome scalability challenges by pre-clustering and efficiently solving large network instances.
COMPUTER COMMUNICATIONS
(2023)
Article
Computer Science, Information Systems
Stefan Geissler, Florian Wamser, Wolfgang Bauer, Steffen Gebert, Samuel Kounev, Tobias Hosfeld
Summary: The rapid growth of connected devices has led to the implementation of IoT-centric platforms for machine-to-machine communication. Mobile virtual network operators (MVNOs) provide global service for IoT use cases by leveraging roaming in physical networks. Overload control mechanisms for IoT mobile networks offer a proactive solution for excessive signaling traffic. This study presents a detailed simulation framework of a real-world IoT MVNO core network and offers a case study on various overload mechanisms.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Computer Science, Information Systems
Anika Seufert, Fabian Poignee, Michael Seufert, Tobias Hossfeld
Summary: In this study, a large dataset of 5,956 private WhatsApp chat histories was provided, containing over 76 million messages from more than 117,000 users. The properties of chat groups and users, as well as the communication within these chat groups, were described and modeled, offering unprecedented insights into private MIM communication. Exemplary measurements were conducted for the most popular message types, enabling the provided models to estimate the traffic over time in a chat group.
Article
Computer Science, Information Systems
Tobias Hossfeld, Poul E. Heegaard, Wolfgang Kellerer
Summary: This article introduces a scalability index (SI) for comparing and benchmarking the scalability of systems. The SI aims to compare the performance of two systems without the need for a reference system. The SI is demonstrated and evaluated in various use cases and practical recommendations are given.
Proceedings Paper
Computer Science, Software Engineering
Tobias Hossfeld, Simon Raffeck, Frank Loh, Stefan Geissler
Summary: The recent rise of IoT has brought up challenges and research questions, particularly in the area of low powered devices and their energy efficiency. This article proposes a generic model to compute the energy efficiency of wireless sensors, using perfect CSMA/CA channel access as an assumption. Numerical results for a typical LoRa device are presented, with potential extensions to other channel access mechanisms.
PROCEEDINGS OF THE 2022 IEEE 8TH INTERNATIONAL CONFERENCE ON NETWORK SOFTWARIZATION (NETSOFT 2022): NETWORK SOFTWARIZATION COMING OF AGE: NEW CHALLENGES AND OPPORTUNITIES
(2022)
Proceedings Paper
Computer Science, Hardware & Architecture
Katharina Dietz, Nicholas Gray, Michael Seufert, Tobias Hossfeld
Summary: With the advancement of digitization and the Internet of Things, the increase in device communication has led to the need for effective management of communication networks. This has led to the adoption of Software-defined Networking (SDN), which simplifies network management and configuration through the introduction of a central controlling entity. However, the scalability and elasticity of SDN controllers pose challenges, leading to the use of distributed controller architectures. In order to overcome these challenges and design SDN-enabled networks effectively, a performance prediction model is trained using Machine Learning based on network properties available during the planning phase.
PROCEEDINGS OF THE IEEE/IFIP NETWORK OPERATIONS AND MANAGEMENT SYMPOSIUM 2022
(2022)
Proceedings Paper
Computer Science, Hardware & Architecture
Nikolas Wehner, Markus Ring, Joshua Schueler, Andreas Hotho, Tobias Hossfeld, Michael Seufert
Summary: This work introduces a new concept for learning embeddings from encrypted network traffic, which evaluates hierarchical embeddings by aggregating packet embeddings to flow embeddings and flow embeddings to trace embeddings, considering the complex dependencies of Internet traffic. The evaluation shows promising results for website fingerprinting.
PROCEEDINGS OF THE IEEE/IFIP NETWORK OPERATIONS AND MANAGEMENT SYMPOSIUM 2022
(2022)
Proceedings Paper
Computer Science, Hardware & Architecture
Simon Raffeck, Stefan Geissler, Michael Krolikowski, Steffen Gebert, Tobias Hossfeld
Summary: The usage and deployment of Internet of Things (IoT) and Machine-to-Machine (M2M) devices have seen significant growth in recent years. Understanding device and data usage behavior is crucial for Mobile Network Operators (MNO) to scale their networks and provide reliable service. This study utilizes a unique dataset to characterize GPRS Tunneling Protocol (GTP) tunnels and devices, providing a large-scale dataset on the data usage behavior of IoT devices for interested researchers.
PROCEEDINGS OF THE IEEE/IFIP NETWORK OPERATIONS AND MANAGEMENT SYMPOSIUM 2022
(2022)
Proceedings Paper
Computer Science, Hardware & Architecture
Viktoria Vomhoff, Stefan Geissler, Frank Loh, Wolfgang Bauer, Tobias Hossfeld
Summary: This study examines signaling anomalies in a dataset from a global MVNO, aiming to determine traffic characteristics during these incidents to enhance operators' understanding of signaling traffic in IoT networks and improve prediction and avoidance of signaling incidents.
PROCEEDINGS OF THE IEEE/IFIP NETWORK OPERATIONS AND MANAGEMENT SYMPOSIUM 2022
(2022)
Proceedings Paper
Computer Science, Hardware & Architecture
Frank Loh, Noah Mehling, Stefan Geissler, Tobias Hossfeld
Summary: Low Power Wide Area Networks, particularly LoRaWANs, are promising solutions for future Internet of Things deployments due to their low energy requirements and long battery lifetimes. However, the limited throughput rates and unreliable nature of LoRa technology hinder its widespread adoption. To address the issue of message collisions, a novel graph-based gateway placement approach is proposed to reduce collision probability and increase reliability in LoRaWAN deployments. The approach performs similarly to state-of-the-art related work and reduces the required number of gateways by up to 40% while decreasing the collision probability by up to 70%.
2022 20TH MEDITERRANEAN COMMUNICATION AND COMPUTER NETWORKING CONFERENCE (MEDCOMNET)
(2022)
Proceedings Paper
Computer Science, Hardware & Architecture
Frank Loh, Noah Mehling, Stefan Geissler, Tobias Hossfeld
Summary: Future Internet of Things deployments face various challenges and opportunities. While 5G networks offer advantages in terms of high throughput and ultra-low latency, certain verticals require low energy consumption for transmitting small amounts of data. Low Power Wide Area Networks serve as a complement to high-performance 5G networks. This study focuses on the parameter study simulation for LoRaWAN channel access using slotted Aloha, providing guidelines for parameter settings and performance comparisons.
PROCEEDINGS OF THE IEEE/IFIP NETWORK OPERATIONS AND MANAGEMENT SYMPOSIUM 2022
(2022)
Article
Computer Science, Information Systems
Florian Metzger, Stefan Geissler, Alexej Grigorjew, Frank Loh, Christian Moldovan, Michael Seufert, Tobias Hosfeld
Summary: Online video games and cloud gaming are increasing in popularity, but their resource demands and network conditions can affect the player's enjoyment. This highlights the need for considering video games in network dimensioning, server placement, and protocol development.
IEEE COMMUNICATIONS SURVEYS AND TUTORIALS
(2022)
Article
Humanities, Multidisciplinary
Anika Seufert, Fabian Poignee, Tobias Hossfeld, Michael Seufert
Summary: The strict restrictions imposed by COVID-19 lockdowns have significantly altered communication behavior in WhatsApp. The lockdowns caused an increase in message frequency, a shift in communication activity during the day, and a change towards more regular messaging.
HUMANITIES & SOCIAL SCIENCES COMMUNICATIONS
(2022)
