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Genetic and Epigenetic Biomarkers on the Personalized Nutrition
Sungwhan An 한국식품영양과학회 2004 한국식품영양과학회 학술대회발표집 Vol.55 No.-
Nutritional genomics is a new field of study of how nutrition interacts with an individual’s genome or individual responds to individual diets. Systematic approach of nutritional genomics will likely provide important clues about responders and non-responders. The current interest in personalizing health stems from the breakthroughs emerging in integrative technologies of genomics and epigenomics and the identification of genetic and epigentic diversity in individual’s genetic make-up that are associated with variations in many aspects of health, including diet-related diseases. Microarray is a powerful screen system that is being also currently employed in nutritional research. Monitoring of gene expression at genome level is now possible with this technology, which allows the simultaneous assessment of the transcription of tens of thousands of genes and of their relative expression of pathological cells such tumor cells compared with that of normal cells. Epigenetic events such as DNA methylation can result in change of gene expression without involving changes in gene sequence. Recent developed technology of DNAarraybased methylation assay will facilitate wide study of epigenetic process in nutrigenomics. Some of the areas that would benefitfrom these technologies include identifying molecular targets (Biomarkers) for the risk and benefit assessment. These characterized biomarkers can reflect expose, response, and susceptibility to foods and their components. Furthermore the identified new biomarker perhaps can be utilized as a indicator of delivery system for optimizing health.
EIT image reconstruction using the imaginary part of the complex potential
Sungwhan KIM,Alexandru Tamasan 한국산업응용수학회 2013 한국산업응용수학회 학술대회 논문집 Vol.8 No.1
In this paper, we consider the complex potential uω which is a solution to the equation ∇ ·((σ + iω?)∇uω) = 0 in the three dimensional object Ω. If the applied angular frequency ω is sufficiently small so that the values of susceptivity ω? is relatively small compared to those of conductivity σ, it is well known that the real part ?(uω) is mainly related to conductivity σ and its approximated image can be obtained from the full knowledge of the Neumann data ∂?(uω)/∂non the boundary ∂Ω. Here ?(z) is the real part of the complex number z. In this paper, we consider the analyticity of the complex potential uω and show that the function Δ(??ln σ)/σ can be determined uniquely and constructablely from the full knowledge of <수식은 본문 참조>.
USEFULNESS OF A NEW POTENTIAL FOR A THIN MEMBRANE-LIKE ANOMALY DETECTION IN EIT
Sungwhan KIM 한국산업응용수학회 2011 한국산업응용수학회 학술대회 논문집 Vol.6 No.1
In this work, we introduce a new elliptic PDE: where γ<SUP>ω</SUP> = σ + iωε is the admittivity distribution of the conducting material Ω. In comparison with the standard elliptic PDE with conductivity coefficient, the usefulness of the introduced elliptic PDE is numerically explained in detecting a thin membrane-like anomaly located in the conducting object Ω.
Toward understanding tuberculosis in North Korea
( Sungwhan Lee ),( Changjoon Lee ),( Heejin Kim ),( Youngae Kang ) 대한결핵 및 호흡기학회 2019 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.127 No.-
Background: North Korea is one of the 30 high TB burdened countries with high percentage of drug-resistant TB. This study aimed to perform the comprehensive review of North Korean medical journals about clinical and laboratory research on TB to understand the medial issues and research trend based on numbers and contents of TB in North Korea. Methods: We analyzed nine medical journals (‘Preventive medicine’, ‘Korea Medicine’, ‘Chosun Medicine’, ‘Internal Medicine’, ‘Pediatrics, Obstetrics and Gynecology’, ‘Surgery’, ‘Medicine’, ‘Basic Medicine’, ‘Chosun Pharmacy’) published from 2006 to 2018. All data on the paper’s authors, titles, year of publication and journals were recorded and analyzed based on the contents of the papers. Results: There were 18596 articles in all nine journals and 106 articles were included for the final analysis.. All 106 articles were one or two pages in length and were written in Korean. Of the 106 papers, 43 were reviews, 52 were original articles, and 8 were cases. When we classified the articles by the field of the study, 52 articles (49%) were about the diagnosis of TB, 39 (37%) were for treatment of the TB. There was no study which investigated the commercialized molecular diagnosis system such as Xpert MTB/RIF assay. DOTS strategy was described as a basic principal of treatment. Of the 39 papers for ‘Treatment’ of TB, there were 6 studies using Korean traditional medicine for treatment of TB, one of them with additional snake venom. Conclusions: The format of article was quite short compared to the requirement of international journals. The papers issuing the treatment of MDR-TB was not found. LTBI and NTM were not major issue in North Korean papers. To understand the current burden of TB and research environment, the data from the nine North Korean journals is insufficient.