Ubiquitous Computing Based Mobile Commerce : Toward the Ubiquitous Commerce

Mobile commerce is heading for advanced fourth generation (4G) mobile systems. However, rapid development of ubiquitous computing technology can implement and complement the 4G mobile systems. It enables anticipation that ubiquitous computing technology creates the new commerce, so called ubiquitous commerce. This paper analyzes the characteristics of mobile commerce service and ubiquitous computing service, and then extracts the core requirements for ubiquitous commerce. Moreover, this paper suggests technical requirements for the ubiquitous commerce. These requirements can lead the development of technology for the future and suggest the milestone that mobile commerce in present heads for

Impact of diabetes mellitus on mortality in patients with acute heart failure: a prospective cohort study

Although more than one-third of the patients with acute heart failure (AHF) have diabetes mellitus (DM), it is unclear if DM has an adverse impact on clinical outcomes. This study compared the outcomes in patients hospitalized for AHF stratified by DM and left ventricular ejection fraction (LVEF). The Korean Acute Heart Failure registry prospectively enrolled and followed 5625 patients from March 2011 to February 2019. The primary endpoints were in-hospital and overall all-cause mortality. We evaluated the impact of DM on these endpoints according to HF subtypes and glycemic control. During a median follow-up of 3.5years, there were 235 (4.4%) in-hospital mortalities and 2500 (46.3%) overall mortalities. DM was significantly associated with increased overall mortality after adjusting for potential confounders (adjusted hazard ratio [HR] 1.11, 95% confidence interval [CI] 1.03–1.22). In the subgroup analysis, DM was associated with higher a risk of overall mortality in heart failure with reduced ejection fraction (HFrEF) only (adjusted HR 1.14, 95% CI 1.02–1.27). Inadequate glycemic control (HbA1c ≥ 7.0% within 1year after discharge) was significantly associated with a higher risk of overall mortality compared with adequate glycemic control (HbA1c < 7.0%) (44.0% vs. 36.8%, log-rank p = 0.016). DM is associated with a higher risk of overall mortality in AHF, especially HFrEF. Well-controlled diabetes (HbA1c < 7.0%) is associated with a lower risk of overall mortality compared to uncontrolled diabetes. Trial registration ClinicalTrial.gov, NCT01389843. Registered July 6, 2011. https://clinicaltrials.gov/ct2/show/NCT01389843This study was supported by Research of Korea Centers for Disease Control and Prevention (2010-E63003-00, 2011-E63002-00, 2012-E63005-00, 2013E63003-00, 2013-E63003-01, 2013-E63003-02, and 2016-ER6303-00)

So near, So far

Thesis (Ph.D.)--University of Washington, 2020This paper is intended to elucidate and analyze artistic practice performed during my doctorate study based on observations of the screen as a receptive surface where the invisible becomes visible and perception and imagination combine. The screen reveals the process of the human mind on perceiving specific things in between a variety of appearances and the endless desire and self-experience that drive one’s perspective to somewhere over physical distance, somewhere we can see our progressions in time. Within the scope of the correlation between screen and space, screen-based works will be revisited through its emergent relationship with the spectator, where the spectator encounters the new materiality of the screen and produces a new subjectivity of affirmation. Furthermore, the paper explains the medium and interactive system used in new media artwork where found footage, computer-aided, real-time visualization, and new possibilities of expressions are visible. Based on an interpretation of Paul Virilio’s theory of dromology (the logic of speed), my dissertation exhibition investigates how one relates to moving images and then seeks to identify modes of associations among ideas that occur in reality. The exhibition aims to expand the perception of existence by implementing screens that become temporal and spatial and are then vitalized through fusion and exchange with real-space parameters such as distance, scale, speed, and directionality