Design Framework for Multimodal Reading Experience in Cross-Platform Computing Devices - Focus on a Digital Bible

With the emergence of cloud computing, a diverse range of content can be read across platforms. Here, we extend our previous research (Kang and Eune 2011), where we proposed three aspects to reinforce seamless reading across different platforms: coherence, immersion, and multimodality. The reading process is classified as pre-reading, during the reading, and post-reading, where each step requires different goals, functions, and types of reading. An appropriate platform among smart phones, Tablet PCs, and PCsis chosen to play a main role at each step. In this research, we verify the design framework of our previous study by analyzing a digital Bible, Youversion, across platforms. In a comparison of the digital Bible and a digital newspaper,which wasthe case from the previous research, we find common characteristics of multimodalreading in each platform. This research contributes to finding a brand new content market for the cloud eco-system while offering a way to enjoy the contentwith an enhanced sense of immersion when analog and digital content types are brought together in a cross-platform environment.OAIID:oai:osos.snu.ac.kr:snu2012-01/102/0000025799/3SEQ:3PERF_CD:SNU2012-01EVAL_ITEM_CD:102USER_ID:0000025799ADJUST_YN:NEMP_ID:A075458DEPT_CD:611CITE_RATE:0FILENAME:____2013_DRS[1].pdfDEPT_NM:디자인학부EMAIL:[email protected]:

A Rapid Capillary-Pressure Driven Micro-Channel to Demonstrate Newtonian Fluid Behavior of Zebrafish Blood at High Shear Rates

Blood viscosity provides the rheological basis to elucidate shear stress underlying developmental cardiac mechanics and physiology. Zebrafish is a high throughput model for developmental biology, forward-genetics, and drug discovery. The micro-scale posed an experimental challenge to measure blood viscosity. To address this challenge, a microfluidic viscometer driven by surface tension was developed to reduce the sample volume required (3μL) for rapid (500 s^(−1)), at which the power law exponent (n) of zebrafish blood was nearly 1 behaving as a Newtonian fluid. The measured values of whole blood from the micro-channel (4.17cP) and the vacuum method (4.22cP) at 500 s^(−1) were closely correlated at 27 °C. A calibration curve was established for viscosity as a function of hematocrits to predict a rise and fall in viscosity during embryonic development. Thus, our rapid capillary pressure-driven micro-channel revealed the Newtonian fluid behavior of zebrafish blood at high shear rates and the dynamic viscosity during development

Spatial and temporal variations in hemodynamic forces initiate cardiac trabeculation

Hemodynamic shear force has been implicated as modulating Notch signaling-mediated cardiac trabeculation. Whether the spatiotemporal variations in wall shear stress (WSS) coordinate the initiation of trabeculation to influence ventricular contractile function remains unknown. Using light-sheet fluorescent microscopy, we reconstructed the 4D moving domain and applied computational fluid dynamics to quantify 4D WSS along the trabecular ridges and in the groves. In WT zebrafish, pulsatile shear stress developed along the trabecular ridges, with prominent endocardial Notch activity at 3 days after fertilization (dpf), and oscillatory shear stress developed in the trabecular grooves, with epicardial Notch activity at 4 dpf. Genetic manipulations were performed to reduce hematopoiesis and inhibit atrial contraction to lower WSS in synchrony with attenuation of oscillatory shear index (OSI) during ventricular development. γ-Secretase inhibitor of Notch intracellular domain (NICD) abrogated endocardial and epicardial Notch activity. Rescue with NICD mRNA restored Notch activity sequentially from the endocardium to trabecular grooves, which was corroborated by observed Notch-mediated cardiomyocyte proliferations on WT zebrafish trabeculae. We also demonstrated in vitro that a high OSI value correlated with upregulated endothelial Notch-related mRNA expression. In silico computation of energy dissipation further supports the role of trabeculation to preserve ventricular structure and contractile function. Thus, spatiotemporal variations in WSS coordinate trabecular organization for ventricular contractile function

Spatial and temporal variations in hemodynamic forces initiate cardiac trabeculation

Hemodynamic shear force has been implicated as modulating Notch signaling-mediated cardiac trabeculation. Whether the spatiotemporal variations in wall shear stress (WSS) coordinate the initiation of trabeculation to influence ventricular contractile function remains unknown. Using light-sheet fluorescent microscopy, we reconstructed the 4D moving domain and applied computational fluid dynamics to quantify 4D WSS along the trabecular ridges and in the groves. In WT zebrafish, pulsatile shear stress developed along the trabecular ridges, with prominent endocardial Notch activity at 3 days after fertilization (dpf), and oscillatory shear stress developed in the trabecular grooves, with epicardial Notch activity at 4 dpf. Genetic manipulations were performed to reduce hematopoiesis and inhibit atrial contraction to lower WSS in synchrony with attenuation of oscillatory shear index (OSI) during ventricular development. γ-Secretase inhibitor of Notch intracellular domain (NICD) abrogated endocardial and epicardial Notch activity. Rescue with NICD mRNA restored Notch activity sequentially from the endocardium to trabecular grooves, which was corroborated by observed Notch-mediated cardiomyocyte proliferations on WT zebrafish trabeculae. We also demonstrated in vitro that a high OSI value correlated with upregulated endothelial Notch-related mRNA expression. In silico computation of energy dissipation further supports the role of trabeculation to preserve ventricular structure and contractile function. Thus, spatiotemporal variations in WSS coordinate trabecular organization for ventricular contractile function

The impact of demographic dissimilarity on service performance: a social network perspectives on communication network

Doctor of PhilosophyDepartment of Hospitality ManagementJichul JangKevin R. RobertsEmployee diversity issues have received attention from both academics and practitioners in hospitality. However, inconsistent effects of diversity on team and organizational performances indicate that further research is needed to achieve a better understanding about diversity. In order to explain the consequences of demographic dissimilarity, this study focuses on employees’ centrality in the formal and informal communication networks based on Social Identity Theory (SIT) and Job Demand Resource (JD-R) theory. The network analysis is used to assess structural positions of employees in work groups. The purpose of the study is to investigate how demographically dissimilar employees are placed in de-center of the formal and informal communication network, and how these communication networks impact in-role and proactive customer service performances. The current study targets at a total 106 hotel employees in the Mid-Eastern hotels in the U.S. Using a paper-pencil survey, questionnaires were distributed to hotel employees. For the social network analysis, a roster format was used to understand the respondents’ communication among their team members. In order to calculate the in-degree centrality in the communication network, UCINET 6.658 was used. The current study examined the negative impact of individual dissimilarity with team members on service performances via communication networks. Specifically, age dissimilarity and racial dissimilarity were negatively related to both formal and informal communication networks, while gender dissimilarity did not influence both formal and informal communication networks. Formal communication network mediated the relationship between age dissimilarity and in-role service performance, and informal communication network mediated the relationships between age dissimilarity and both in-role service performance and proactive customer service performance. In addition, formal and informal communication networks mediated the relationships between racial dissimilarity and both service performances. However, this study did not find the significant mediating effects of formal and informal communication networks in the relationships between gender dissimilarity and service performances. The contributions of the study to theory and practice are included along with limitations and directions for future research

Reducing perceived health risk to attract hotel customers in the COVID-19 pandemic era: Focused on technology innovation for social distancing and cleanliness

As an essential risk-reduction strategy, technology innovation is likely to play a key role in the hotel industry’s recovery from the 2020 coronavirus pandemic. However, its impact on customer decision-making behavior is unknown. Focusing on technology innovation for reducing guest interaction with employees and enhancing cleanliness, the purpose of this research was to examine the impact of expected interaction and expected cleanliness on perceived health risk and hotel booking intention. Three experimental studies were conducted using online consumer samples. The studies found that low levels of expected interaction through technologymediated systems lead to low levels of perceived health risk. Perceived health risk mediates the relationship between expected interaction and hotel booking intention. In addition, high levels of expected cleanliness through advanced cleaning technologies moderate the impacts of expected interaction on perceived health risk.Importantly, the proposed perceived risk mechanism was effective in post-pandemic scenarios. Theoretical and practical implications are discussed

Smart city as a social transition towards inclusive development through technology:a tale of four smart cities

Smart city initiatives have the potential to address many contemporary urban challenges, utilizing information and technology. Increasingly, smart cities are considered as social innovation processes to achieve sustainable and inclusive urban development, being influenced by broader socio-economic and institutional contexts of cities. This paper explores ‘smart city transitions’ across varied urban contexts, in particular, how smart city transitions are enacted and how they contribute to inclusive urban transformation and public value. Using a multiple case studies approach, the research investigated infrastructure planning practices in Amsterdam in the Netherlands, Seoul in Korea, Portland in the U.S. and Ho Chi Minh City (HCMC) in Vietnam, cities that were known for strong efforts to establish integrated platforms to enhance societal benefits. Our analysis showed that each city has addressed its goals around sustainability, equity and affordability by reinforcing the engagement of multiple actors with the support of integrated platforms that facilitate open and multi-directional information flow in a transparent manner. In Amsterdam, innovative solutions for sustainable use of resources have been invented and distributed through multi-level social networks, contributing to the transformation into a circular economy. In Seoul and HCMC, the city's persistent efforts to utilize an open and integrated platform resulted in proactive engagement and collaboration of public and private actors in improving quality, equity and efficiency of transit services. Portland has tackled inequitable access and mistrust issues by setting principles for data governance and facilitating equity in the adoption of innovative technologies. Our research revealed that four cities established different forms of integrated platforms such as a centrally-controlled platform and a community-centred platform in order to address specific socio-economic issues within an institutional setting of each city. We concluded that building an integrated platform is not easy, but it is a critical prerequisite for the process of sustainable transformation to truly achieve smart cities across the globe.</p