• Geomechanics and Engineering
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• 제34권3호
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• pp.267-284
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• 2023

Landslides are one of the most dangerous phenomena and natural disasters. Landslides cause many human and financial losses in most parts of the world, especially in mountainous areas. Due to the climatic conditions and topography, people in the northern and western regions of Iran live with the risk of landslides. One of the measures that can effectively reduce the possible risks of landslides and their crisis management is to identify potential areas prone to landslides through multi-criteria modeling approach. This research aims to model landslide potential area in the Oshvand watershed using a support vector machine algorithm. For this purpose, evidence maps of seven effective factors in the occurrence of landslides namely slope, slope direction, height, distance from the fault, the density of waterways, rainfall, and geology, were prepared. The maps were generated and weighted using the continuous fuzzification method and logistic functions, resulting values in zero and one range as weights. The weighted maps were then combined using the support vector machine algorithm. For the training and testing of the machine, 81 slippery ground points and 81 non-sliding points were used. Modeling procedure was done using four linear, polynomial, Gaussian, and sigmoid kernels. The efficiency of each model was compared using the area under the receiver operating characteristic curve; the root means square error, and the correlation coefficient . Finally, the landslide potential model that was obtained using Gaussian's kernel was selected as the best one for susceptibility of landslides in the Oshvand watershed.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2023년도 임시총회 및 춘계학술대회
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• pp.40-40
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• 2023

Atopic dermatitis is a chronic inflammatory skin diseases caused by skin barrier dysfunction. Allium victoralis var. Platyphyllum (AVP) is a perennial plant used as vegetable and herbal medicine. The purpose of this study was to suggest that AVP is a new cosmetic material by examining the effects of AVP on the skin barrier and inflammatory response. A bibliometric network analysis was performed through keyword co-occurrence analysis by extracting author keyword from 69 articles retrieved from SCOPUS. We noted the anti-inflammatory activity shown by the results of clustering and mapping from network visualization analysis using VOSviewer software tool. HPLC-UV analysis showed that AVP contains 0.12 ± 0.02 mg/g of chlorogenic acid and 0.10 ± 0.01 mg/g of gallic acid. AVP at 100 ㎍/mL was shown to increase the mRNA levels of filaggrin and involucrin related to skin barrier function by 1.50-fold and 1.43-fold, respectively. In the scratch assay, AVP at concentrations of 100 ㎍/mL and 200 ㎍/mL significantly increased the cell migration rate and narrowed the scratch area. In addition, AVP suppressed the increase of inflammation-related factors COX-2 and NO and decreased the release of β-hexosaminidase. This study suggests that AVP can be developed as a functional cosmetic material for atopy management through skin barrier protection effects, anti-inflammatory and anti-itch effects.

• Animal Bioscience
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• 제37권4호
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• pp.576-590
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• 2024

Objective: The objective of this study was to identify genes associated with 305-day milk yield (MY) and fat yield (FY) that also influence the adaptability of the Thai multibreed dairy cattle population to tropical conditions. Methods: A total of 75,776 imputed and actual single nucleotide polymorphisms (SNPs) from 2,661 animals were used to identify genomic regions associated with MY and FY using the single-step genomic best linear unbiased predictions. Fixed effects included herd-year-season, breed regression, heterosis regression and calving age regression effects. Random effects were animal additive genetic and residual. Individual SNPs with a p-value smaller than 0.05 were selected for gene mapping, function analysis, and quantitative trait loci (QTL) annotation analysis. Results: A substantial number of QTLs associated with MY (9,334) and FY (8,977) were identified by integrating SNP genotypes and QTL annotations. Notably, we discovered 17 annotated QTLs within the health and exterior QTL classes, corresponding to nine unique genes. Among these genes, Rho GTPase activating protein 15 (ARHGAP15) and catenin alpha 2 (CTNNA2) have previously been linked to physiological traits associated with tropical adaptation in various cattle breeds. Interestingly, these two genes also showed signs of positive selection, indicating their potential role in conferring tolerance to trypanosomiasis, a prevalent tropical disease. Conclusion: Our findings provide valuable insights into the genetic basis of MY and FY in the Thai multibreed dairy cattle population, shedding light on the underlying mechanisms of tropical adaptation. The identified genes represent promising targets for future breeding strategies aimed at improving milk and fat production while ensuring resilience to tropical challenges. This study significantly contributes to our understanding of the genetic factors influencing milk production and adaptability in dairy cattle, facilitating the development of sustainable genetic selection strategies and breeding programs in tropical environments.

• 대한통합의학회지
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• 제12권3호
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• pp.101-120
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• 2024

Purpose : This study aimed to carry out a scoping review to investigate the research trends in non-pharmacological interventions for physical rehabilitation following breast cancer treatment. Methods : A scoping review was conducted according to the five steps outlined by Arksey and O'Malley and PRISMA-ScR. We searched three domestic databases (ScienceOn, Riss, KCI) and two international databases (PubMed, Cochrane Central) between January 2014 and April 2024. The keywords used were 'breast cancer surgery', 'breast cancer treatment', 'breast cancer lymphedema', 'intervention', 'management', 'therapy', 'disorder', and 'dysfunction'. Results : In terms of publication, the number of studies in the past five years has increased compared to the previous five years, with most studies focusing on patients aged 41 to 60 and who underwent surgical treatment for breast cancer. A total of 43 different types of non-pharmacological interventions were applied: 21 single interventions and 22 combination interventions. Among the intervention methods, complete decongestive treatment (CDT), resistance training, and manual lymphatic drainage were the most frequently utilized. The most common duration of intervention turned out to be 4~5 weeks and more than 8 weeks, with frequencies of 2~3 sessions per week and more than 4 sessions per week. The most frequently used dependent variables included range of motion (ROM) and disabilities of the arm, shoulder and hand (DASH) for the function and disorder of the upper limb category; arm circumference or volume and bio-impedance for the lymphedema category; visual analogue scale (VAS) and numerical rating scale (NRS) for the pain category; and the European organization for research and treatment of cancer quality of life questionnaire breast cancer module (EORTC QLQ) and functional assessment of cancer therapy-breast (FACT-B) for the quality of life category. Conclusion : The findings of this scoping review provide valuable mapping data for non-pharmacological interventions for physical rehabilitation following breast cancer treatment. We recommend further research, particularly systematic reviews and meta-analyses, to build upon these findings.

• 대한영상의학회지
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• 제84권5호
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• pp.1123-1133
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• 2023

목적 만성폐쇄성폐질환의 CT에서 자동 정량 측정된 체성분과 폐기능 또는 정량적 변수들 사이의 연관성을 알아보고자 하였다. 대상과 방법 총 290명의 만성폐쇄성폐질환 환자를 대상으로 연구하였다. 흉부 CT에서 근육 및 피하지방 부피, T12 레벨에서 근육 및 피하지방 면적 및 골 감쇠를 딥러닝 기반 분할 알고리즘을 사용하여 획득하였다. Parametric response mapping-derived emphysema (이하 PRM^emph), PRM-derived functional small airway disease (이하 PRM^fSAD) 및 기도 벽 두께(airway wall thickness; 이하 AWT)-Pi10을 정량적으로 평가하였다. Pearson 상관 분석을 사용하여 체성분과 결과 간의 연관성을 평가하였다. 결과 근육과 피하지방의 부피와 면적은 PRM^emph와 PRM^fSAD와 음의 상관관계를 보였다(p < 0.05). T12에서의 골밀도는 PRM^emph와 음의 상관관계를 보였다(r = -0.1828, p = 0.002). 피하지방의 부피와 면적과 T12에서의 골밀도는 AWT-Pi10과 양의 상관관계를 보였다(r = 0.1287, p = 0.030; r = 0.1668, p = 0.005; r = 0.1279, p = 0.031). 반면에 근육 부피는 AWT-Pi10과 음의 상관관계를 보였다(r = -0.1966, p = 0.001). 근육 부피는 폐기능과 의미 있는 연과성을 보였다(p < 0.001). 결론 흉부 CT에서 정량적으로 평가된 체성분은 만성폐쇄성폐질환의 표현형 또는 중증도와 연관성을 보인다.

• 대한토목학회논문집
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• 제10권4호
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• pp.77-85
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• 1990

최근 원격탐측(遠隔探測)의 이용분야가 소축척지도제작(所縮尺地圖製作) 뿐만 아니라 토지(土地), 환경(環境) 및 자원(資源)에 대한 정보해석(情報解析)에까지 확대되고 있다. 특히, SPOT 위성영상(衛星映像)은 높은 해상력(解像力)과 적합한 기선고도비(基線高度比) 및 입체영상(立體映像)의 획득(獲得)이 가능(可能)하며 3차원(次元) 위치결정(位置決定) 등(等)에 필요한 자료(資料)를 제공(提供)한다. 본(本) 연구(硏究)에서는 이와 같이 SPOT 위성영상(衛星映像)을 이용한 3차원(次元) 위치결정(位置決定)에 있어서 중요한 요소(要素)인 외부표정요소결정(外部標定要素決定)에 관한 알고리즘 개발(開發) 및 최적다항식결정(最適多項式決定)에 목적(目的)을 두고 있다. 따라서 본(本) 연구결과(硏究結果) 전처리(前處理) level 1B 사진(寫眞)필름의 위성영상(衛星映像)의 외부표정요소결정(外部標定要素決定) 알고리즘을 제시(提示)하였으며, 외부표정요소(外部標定要素)의 다항식(多項式) 결정(決定)에 있어서는 위성위치요소(衛星位置要素)($X_o$, $Y_o$, $Z_o$)는 1차(次) line함수(函數), 위성자세요소(衛星姿勢要素)(${\kappa}_o$, ${\phi}_o$, ${\omega}_o$)는 2차(次) line 함수식(函數式)으로 표현되는 미지수(未知數)가 15개(個)인 경우가 최적다항식(最適多項式)임을 알 수 있었다.

• 한국지리정보학회지
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• 제5권2호
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• pp.16-24
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• 2002

원격탐사 응용분야 중 토지피복 분류를 통한 지구환경의 원격탐지기법은 환경 관리, 도시계획 및 지리정보시스템의 응용분야에 광범위하게 사용되고 있는 접근방식이다. 본 연구는 다목적 실용위성(Korea Multi-Purpose Satellite : KOMPSAT)의 전자광학카메라(electro-optical camera : EOC)를 통해 취득한 영상의 토지피복 정보를 추출하는 방안을 제시하였다. 사용영상은 다중 분광정보를 보유하고 있는 공간해상도 30m의 Landsat TM과 6.6m의 공간해상도와 단일밴드로 구성되어 있는 KOMPSAT EOC영상이며, 연구 대상지역은 청주시 미호천 수계이다. 영상합성은 IHS(intensity hue saturation), HPF(high pass filtering), CN(color normalization), 그리고 Wavelet 변환방식을 적용하여 결과를 비교하였다. 합성된 영상은 RBF-NN(radial basis function neural network)과 ANN(artificial neural network)법을 이용하여 피복분류를 실시하였으며, 이상의 과정을 통해 최적 결과를 도출하는 영상합성 및 분류기법을 제시하였다.

• Korean Journal of Acupuncture
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• 제23권2호
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• pp.89-103
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• 2006

Objectives: Recently, the effect of acupuncture has been approved not only in the East but also in the West, so the interest on acupuncture was greatly improved. Especially, functional magnetic resonance imaging(fMRI) was embossed as the study tool for the mechanism of acupuncture noninvasively and many studies on the mechanism of acupuncture using fMRI were carried out. We archived the fMRI study on the brain activity induced by manual acupuncture at BL62(申脈). Methods: The study was the acupuncture at BL62(申脈) and we acquired 9 fMRI results from 6 persons$(age\;20{\sim}30,\;4\;male\;and\;2\;female)$. These studies employed The block design for mapping brain activity and acupuncture was perfomed at BL62(申脈) on the left foot. Results: The brain related motor function was cerebellum, basal ganglia and cerebral cortex and thalamus connected these elements. In the result of this study, the regions of significant activation in the cerebellum was centered on the spinocerebellum in the anterior lobe, so we presumed that this result showed the input of stimulation by the acupuncture on BL62(申脈). But basal ganglia and cerebral cortex showed the regions of significant activation in the left larger than the right and regions of the cerebral cortex was the motor and sensory cortex. Such a result explained that acupuncture at BL62(申脈) could have influence the motor function and acupuncture at left BL62(申脈) could affect the right side through the activation of the left basal ganglia and cerebral cortex. Conclusions: In the theory of crossing needling at collaterals(繆刺論), it the pathogenic factor invaded in the Yang Heel channel(陽?脈) that was one of the eight Extra meridians(奇經八脈), we recognized the disease of the collateral channel and used contralateral BL62(申脈) for treatment of the Yang Heel channel(陽?脈). Moreover the result of this study could bear the construction that acupuncture at the left BL62(申脈) treats the contralateral lesion and this construction is related to the theory of crossing needling at collaterals(繆刺論).

• 전자공학회논문지SC
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• 제49권1호
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• pp.29-38
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• 2012

의료 영상의 획득하는 과정에서 발생하는 잡음은 영상판독 및 진단을 방해하는 요소로 작용한다. 이러한 잡음으로 오염된 영상으로부터 원본영상을 복원하기 위하여 R.O.F(L.Rudin, S Osher, E. Fatemi)에 의해서 제안된 총변이 최적화 알고리즘은 정규화와 합도의 균형을 맞춰 잡음을 제거할 수 있는 방법이다. 그러나 잡음 제거율을 높이기 위한 반복연산을 수행하는 과정에서 발생하는 경계영역의 몽롱화 현상은 피할 수 없다. 본 논문에서는 총변이 최적화 알고리즘의 제어 파라미터를 잡음 분산과 영상의 지역분산 특성에 따라서 가변적으로 변환시켜 치아영상의 경계 영역의 왜곡을 최소화하고 전체 영상의 잡음을 제거하고자 하였다. CBCT 치아영상 464장을 대상으로 제안된 알고리즘을 적용한 결과, 기존의 R.O.F가 제안한 방법에 비해 PSNR측면에서 약 3dB 정도 향상됨을 보였다. 또한 처리된 결과영상을 3D 볼륨으로 재구성하여 비교한 결과, 기존의 방법보다 치아모델의 경계영역이 더 잘 보존됨을 보여주었다.

• 정보처리학회논문지D
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• 제17D권2호
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• pp.129-146
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• 2010

최근 다양한 분야에서 폭넓게 활용되고 있는 XML 문서는 유연하고도 개방적인 특성으로 인해 정보교환이나 전송을 위한 수단으로 널리 이용되고 있다. 한편 XML 문서를 위한 시각적, 직관적 질의 언어인 XML-GL은 질의에 대한 의미와 결과 문서의 구조를 시각적으로 표현할 수 있기 때문에 XML 문서에 대한 구조 검색과 정보의 공유가 용이하다. 그리고 UML은 정해진 표기법과 다양한 다이어그램을 이용하여 객체지향 분석과 설계를 위한 도구로 사용되고 있다. 따라서 본 논문은 XML-GL의 데이터 모델인 XML-GDM을 기반으로 표현된 XML 문서를 UML 클래스 다이어그램으로 사상하기 위한 새로운 객체 모델링 방안을 제안한다. 이를 통해서 XML 문서를 직관적인 방법으로 객체지향데이터로 변환하고 저장/관리할 수 있다. 또한 객체지향 검색방법을 적용하면 보다 효율적으로 XML 문서를 검색할 수가 있다.