Publications by authors named "Ji Hwan Cha"

Background: Current literature suggests relatively low accuracy of multi-class wound classification tasks using deep learning networks. Solutions are needed to address the increasing diagnostic burden of wounds on wound care professionals and to aid non-wound care professionals in wound management.

Objective: To develop a reliable, accurate 9-class classification system to aid wound care professionals and perhaps eventually, patients and non-wound care professionals, in managing wounds.

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Article Synopsis
  • The study aims to create a risk scoring system to gauge the likelihood of amputation in patients with diabetic foot ulcers by evaluating the levels of vasculopathy and infection severity.
  • Researchers graded the severity of vasculopathy (blood flow issues) and infection using specific scores, and combined these to give a total risk score ranging from 0 to 4.
  • Results indicated that higher risk scores correlated with a significantly increased likelihood of both major and minor amputations, suggesting the scoring system is a useful predictive tool for clinical outcomes.
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Background: Correcting infraorbital hollowness is an important procedure for midface rejuvenation. Sub-orbicularis oculi fat lift is a commonly used method. However, adipose tissue, which has been thought of as sub-orbicularis oculi fat, has recently been controversial.

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Until now, in the literature, a variety of acceptance reliability sampling plans have been developed based on different life test plans. In most of the reliability sampling plans, the decision procedures to accept or reject the corresponding lot are developed based on the lifetimes of the items observed on tests, or the number of failures observed during a pre-specified testing time. However, frequently, the items are subject to degradation phenomena and, in these cases, the observed degradation level of the item can be used as a decision statistic.

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A new probabilistic model of aging that can be applied to organisms is suggested and analyzed. Organisms are subject to shocks that follow the generalized Polya process (GPP), which has been recently introduced and characterized in the literature. Distinct from the nonhomogeneous Poisson process that has been widely used in applications, the important feature of this process is the dependence of its future behavior on the number of previous events (shocks).

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A specific mortality rate process governed by the non-homogeneous Poisson process of point events is considered and its properties are studied. This process can describe the damage accumulation in organisms experiencing external shocks and define its survival characteristics. It is shown that, although the sample paths of the unconditional mortality rate process are monotonically increasing, the population mortality rate can decrease with age and, under certain assumptions, even tend to zero.

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