기능성 소화불량 환자에서 설 지표의 경향성 파악

김지혜,고석재,박재우,김근호,Kim, Jihye,Ko, Seok-jae,Park, Jae-woo,Kim, Keun Ho 대한한방내과학회 2018 대한한방내과학회지 Vol.39 No.4

Objectives: In this study, the tongue features of patients with functional dyspepsia (FD) were compared with those of healthy controls. Methods: This prospective, case-control study was conducted on patients with FD and controls recruited at a single center. After screening, the subjects were allocated to the patient or control groups (patients=42, controls=40). Tongue images were acquired using a computerized tongue image acquisition system (CTIS). An independent t-test was conducted to compare the measurements from patients and controls. Binary logistic regression was performed to determine significant differences between the two groups after adjusting for age and sex. Results: The CIE $a^*$ color value in the tongue coating area was significantly lower in the patients with FD than in the controls (p=0.001). The tongue coating ratios were also significantly higher in the FD group than in the control group (p=0.003). We found that the CIE $a^*$ color value in the tongue coating area and the tongue coating ratios were significant predictive factors in both groups, based on binary regression analysis (p=0.016, 0.044, respectively). Conclusions: This study found that FD was significantly associated with CIE $a^*$ color value in the tongue coating area and tongue coating ratios. We suggest that these factors could be used as objective indicators of FD.

국내 중재사례를 통한 주요 건설 클레임 예측 방안

김지혜,임혜경,최재현,Kim, Jihye,Im, Haekyung,Choi, Jaehyun 한국건설관리학회 2016 건설관리 : 한국건설관리학회 학회지 Vol.17 No.5

건설 프로젝트의 특성 상, 예측하기 어려운 리스크 인자에 노출되기 쉽고, 다양한 이해관계자들이 함께 동일 프로젝트를 수행하는 과정에서 발생하는 분쟁이 주요 리스크 인자로 인식된다. 다양한 분쟁은 주로 클레임 제기, 조정, 중재, 그리고 소송으로 나타나며 막대한 비용과 시간의 손실을 초래할 수 있다. 따라서 국내 건설기업의 건설 프로젝트 수행과정에서 발생하는 클레임, 분쟁의 유형과 원인을 도출하고, 각 원인의 영향도 분석을 통해 클레임, 분쟁관리에 대한 적극적인 대비가 필요하다. 본 연구는 국내 건설프로젝트에서 발생한 클레임, 분쟁 판례를 수집하여 유형과 원인에 따른 빈도와 영향도를 정량화 하고, 중요도 분석을 통해 주요 클레임 원인을 도출하였다. 도출된 주요 클레임 원인은 공사변경, 상대방의 부당한 행위, 공사 지연에 관한 클레임으로 해당 클레임 원인이 발생할 경우 클레임 비용에 대한 예측을 회귀 모형화 하였다. 주요 클레임 원인별 영향도 예측 결과 공사변경의 경우 전체공사비의 16.1%, 상대방의 부당한 행위는 전체공사비의 5.7%, 공사 지연은 전체공사비의 2.7%로 발생하는 것으로 분석되었다. 본 연구결과를 통해 국내 건설산업의 주요 클레임 요인을 도출하고, 클레임 비용을 예측함으로써 보다 적극적인 클레임 대비에 활용 될 수 있도록 하였고, 더 나아가 국내 건설기업의 프로젝트 관리 역량 평가 및 향상에 기여하고자 하였다. Various risk factors are known to be the nature of construction project execution process. These factors lead to potential claims, dispute mediation, arbitration, and litigation which can result in huge loss of money and time. Therefore, it is necessary for construction companies in Korea to improve overall project management capability through the evaluation before entering into the overseas construction market. Also, after examination of the claim and dispute caused by construction project risks, a substantial degree of influence and active preparation for the claim and dispute management should be confirmed via the effect analysis of the each factors. Main claim causes were derived through claim and dispute cases involved with domestic construction projects. As a prediction result of the main claim, 16.1% of the construction change claim, 5.7% of the bad faith claim and 2.7% for the construction delay claim were found to be the portion of the total construction cost. As a result of this analysis, risk management methodology was suggested to improve a project management capability for domestic construction companies through analysis result of the main factors of construction claims.

포도 수확 작업의 작업특성에 따른 손목과 팔꿈치 각도 영향 분석

김지혜,이인석,Kim, Jihye,Lee, Inseok 대한인간공학회 2017 대한인간공학회지 Vol.36 No.5

Objective: The objective of this study was to measure the upper-limb motions and postures of grapes-harvesting tasks using electrical goniometers and analyze the upper-limb motions in a kinematic way to assess the risk of musculoskeletal disorders. Background: Grapes farmers are exposed to various risk factors of musculoskeletal disorders (MSDs) such as repetitive upper-limb motions, non-neutral postures, and manual handling of heavy items. The farmers have to use scissors repetitively while harvesting grapes with their being arms elevated over the shoulder height, which presumed to increase the physical workload. It has been reported that the grapes farmers feel the harvesting task as the one of the hardest work in cultivating grapes. We tried measure the wrist and elbow angles while the farmers were carrying out harvesting tasks to understand how much workload the work impose on the farmers, which can be helpful in making interventions of preventing musculosksletal disorders among grapes farmers. Method: We measured joint angles at the right wrist and elbow with a wireless measuring system with two electrical goniometers from five grape farmers. The grapes-harvesting task was classified into 6 different subtasks: 1) searching, 2) picking, 3) cleaning, 4) carrying, 6) storing, and 7) miscellaneous tasks. The subtasks were compared by mean angles, 10%, 50%, and 90% APDF values of wrist flexion/extension, ulnar/radial deviation, and elbow flexion. Results: The Kruskal-Wallis tests showed that the 10th percentiles of APDF of ulnar/radial deviation and flexion/extension of the wrist significantly differs among subtasks (p<0.05). It was found that the farmers assumed more deviated wrist postures in the ulnar direction when they picking and adjusting the grapes. The use of scissors seemed to force the farmers to severely bend their wrist in the directions of ulnar deviation and flexion. The grapes-harvesting task showed similar wrist postures and motion with poultry deboning and milking tasks. Conclusion: The grapes harvesting tasks make the farmers take ulnar deviated and extended postures in the wrist. The use of scissors makes them take more severely deviated postures in the wrist. Safety guidelines including use of ergonomic scissors can be provided to the farmers to improve their work conditions. Application: The results of this study can be used as a basic data for the development of safety guidelines for agricultural work.

Gradient Boosting 기법을 활용한 다크넷 트래픽 탐지 및 분류

김지혜,이수진,Kim, Jihye,Lee, Soo Jin 한국정보보호학회 2022 정보보호학회논문지 Vol.32 No.2

Darknet is based on the characteristics of anonymity and security, and this leads darknet to be continuously abused for various crimes and illegal activities. Therefore, it is very important to detect and classify darknet traffic to prevent the misuse and abuse of darknet. This work proposes a novel approach, which uses the Gradient Boosting techniques for darknet traffic detection and classification. XGBoost and LightGBM algorithm achieve detection accuracy of 99.99%, and classification accuracy of over 99%, which could get more than 3% higher detection accuracy and over 13% higher classification accuracy, compared to the previous research. In particular, LightGBM algorithm could detect and classify darknet traffic in a way that is superior to XGBoost by reducing the learning time by about 1.6 times and hyperparameter tuning time by more than 10 times.

데이터 전송을 위한 전용 명령어 및 I/O 포트를 탑재한 8051 마이크로콘트롤러의 설계

김지혜,이성수,Kim, Jihye,Lee, Seongsoo 한국전기전자학회 2015 전기전자학회논문지 Vol.19 No.4

In this paper, an 8051 microcontroller with application-specific instructions and I/O ports for data transmission is designed. The designed microcontoller includes two UART ports and one SMBus port to control external devices and to transmit data with them. Application-specific instruction is developed and added to the instruction set to exploit these I/O ports. So the designed microcontroller can perform multi-device control and multi-byte transmission. Also, it can reduce the code size of the application program. Especially, the designed microcontroller does not stall and can execute other programs during data transmission, which significantly increases its efficiency. Synthesized in 0.18 um technology, the area overhead due to application-specific instructions was negligible. Operations of all instructions and I/O ports were verified to run correctly on a FPGA board.

원발부위 불명암 환자의 한의치험 1례

김지혜,배겨레,박지혜,박소정,조종관,유화승,Kim, JeeHye,Bae, KyeoRe,Park, JiHye,Park, SoJung,Cho, ChongKwan,Yoo, HwaSeung 대한암한의학회 2016 大韓癌韓醫學會誌 Vol.21 No.1

Objective : The purpose of this study is to report the possibility of treatment of Cancer of Unknown Primary Site (CUPS) patient with Traditional Korean Medicine based Samchilchoongcho-jung and Gunchilgyebok-Jung following chemotherapy. Methods : The patient is a female, who was diagnosed with CUPS, suffering from left flank pain, abdominal discomfort, nausea, vomiting and fatigue after chemotherapy. The patient was treated with acupuncture, pharmacoacupuncture, moxibution, herbal medicine and enema used with herbal decoction for 15 days. The clinical outcomes were measured by numeric rating scale(NRS). Results : After treatment, left flank pain had disappeared and nausea and vomiting was decreased from NRS 4 to NRS 1 respectively. Fatigue was also improved. Conclusion : This case study suggests that Traditional Korean Medicine is effective for treatment of CUPS patients and can improve the quality of life.

기후변화 및 토지이용변화 시나리오를 고려한 황구지천 유역의 설계홍수량 평가

김지혜,박지훈,송정헌,전상민,강문성,Kim, Jihye,Park, Jihoon,Song, Jung-Hun,Jun, Sang Min,Kang, Moon Seong 한국농공학회 2016 한국농공학회논문집 Vol.58 No.1

Extreme floods occur more often recently as the frequency of extreme storm events increase due to the climate change. Because the extreme flood exceeding the design flood can cause large-scale disasters, it is important to predict and prepare for the future extreme flood. Flood flow is affected by two main factors; rainfall and land use. To predict the future extreme flood, both changes in rainfall due to the climate change and land use should be considered. The objective of this study was to simulate the future design flood in the Hwangguji river watershed, South Korea. The climate and land use change scenarios were derived from the representative concentration pathways (RCP) 4.5 and 8.5 scenarios. Conversion of land use and its effects (CLUE) and hydrologic modelling system (HEC-HMS) models were used to simulate the land use change and design flood, respectively. Design floods of 100-year and 200-year for 2040, 2070, and 2100 under the RCP4.5 and 8.5 scenarios were calculated and analyzed. The land use change simulation described that the urban area would increase, while forest would decrease from 2010 to 2100 for both the RCP4.5 and 8.5 scenarios. The overall changes in design floods from 2010 to 2100 were similar to those of probable rainfalls. However, the impact of land use change on design flood was negligible because the increase rate of probable rainfall was much larger than that of curve number (CN) and impervious area.

인포그래픽스(infographics)를 활용한 한국어 중급 읽기 수업 연구

김지혜 ( Jihye Kim ) 민족어문학회 2016 어문논집 Vol.- No.77

본 연구의 목적은 한국어 읽기 수업 자료로 인포그래픽스(infographics)의 교육적 가치를 검토해 보고, 인포그래픽스를 활용한 읽기 수업을 제안하는 데에 있다. 읽기 교육을 위해 한국어 학습자들에게 제공되는 자료는 학습 목표와 기능에 부합하는 것으로 실제적이며 흥미롭고 매력적이어야 한다. 또한 학습자들이 실생활에서 자주 경험할 수 있는 친숙한 것으로 교실과 의사소통 현장을 자연스럽게 연결해 줄 수 있어야 한다. 인포그래픽스는 글로 된 정보를 이미지나 그래픽, 동영상 등을 활용해 구현한것으로 스마트기기를 기반으로 읽기를 하는 현대인들이 자주 접하는 매체이다. 수많은 정보가 체계적으로 압축된 인포그래픽스는 정보를 효율적으로 획득할 수있고, 창조적이고 비판적인 사고를 동원해 정보를 재구성할 수 있게 한다. 이에인포그래픽스는 실제성과 친숙도, 매력도 등에서 읽기 교육을 위한 자료로서 충분한 가치를 지닌다. 본고에서는 인포그래픽스에 대한 기존 연구에 이어 인포그래픽스의 교육적 의의를 살피고, 인포그래픽스를 읽기 수업에 활용하기 위해 필요한 단계와 내용을소개하고자 한다. The aim of this study is to examine the educational value of infographics as a reading material in Korean reading classes, and to suggest an advisable reading class with infographics. Materials provided in Korean reading classes should correspond to the learning aim and function, as well as be authentic, interesting, and attractive. Also, they should be familiar and easily found in real lives of students in order to connect the classroom with communication practices. Infographics, which are images that contain information in pictures, graphics, or video clips, are a medium that people often see on their smart phone screen. In infographics, a lot of information is systematically concentrated, so a viewer can effectively obtain information, and reconstruct the information using creative and critical thinking. Therefore, when it comes to the authenticity, familiarity, and attractiveness of infographics, they have enough value as an educational material. Continuing previous studies, the researcher seeks an educational meaning of infographics, and introduces necessary steps and activities that are needed for utilizing infographics in reading classes.

다양한 원수에서 역삼투 공정 성능모델 적합도 비교

김지혜 ( Kim Jihye ),신연정 ( Shin Yeon-jeong ),권순범 ( Kwon Soonbuhm ),임재림 ( Lim Jaelim ) 한국물환경학회 2020 공동 춘계학술발표회 Vol.2020 No.0

물 부족 문제가 심각해짐에 따라 다양한 대체수자원을 활용한 안정적인 수자원 확보의 중요성이 지속해서 강조되고 있다. 특히, 무한한 자원인 해수를 활용하는 해수담수화 기술, 하천 오염부하 저감과 물 확보를 동시에 충족하는 하·폐수 재이용 기술 등이 크게 관심을 얻고 있다. 해수담수화 및 공업용수 공급 목적의 하·폐수 재이용 시설의 경우 역삼투법(Reverse osmosis, RO)이 주 공정으로 활용된다. 이 때, 분리막 공정의 특성상 역삼투 공정에서 막오염은 피할 수 없는 현상이기 때문에, 막오염 영향을 고려한 성능분석 및 예측은 매우 중요하다. 역삼투 공정의 성능을 모사하는 모델은 이론 기반의 모델과 데이터 기반의 모델로 나눠지며, 데이터 기반 모델은 대표적으로 다음과 같다; (1) J(t)=J0/(1+2φJ0t)^1/2, (2) f(x)=x^m, (3) f(x)=a*exp[b/(x+c)], (4) f(x)=α*exp(-x/β)+γ*exp(-x/n). 역삼투 공정의 원수 수질 및 운전 조건에 따라 모델 적합도에 차이가 있을 수 있으므로, 조건에 맞는 정확한 모델 선정이 중요하다. 본 연구에서는 해수, 해수와 다양한 수원(정수장 침전수, 폐수방류수, 대호지 침전수)의 혼합수, 폐수방류수, 폐수방류수 농축수를 원수로 Lab-scale 역삼투 평막 장치에서 성능평가 한 실험 데이터를 활용하여 역삼투 성능모델의 정확도 비교 분석하였다. 실험 데이터를 위의 4가지 모델에 적용하여 정확도를 분석한 결과, 3, 4번 모델식이 각각 정확도(R²) 0.70 이상으로 높게 나타났으며, 1, 2번 모델식은 각각 평균 정확도 0.60 이하로 확인되었다. Lab-scale 실험 장치에서 장기간(7일) 평가한 데이터를 4가지 모델과 비교한 결과에서도 3, 4번 모델식이 정확도 0.8 이상으로 높게 나타났다. 따라서, 데이터 기반의 역삼투 공정 성능예측 모델 중 역삼투 성능모사를 위해 적합한 모델은 3번과 4번 모델로 판단되며, 비슷한 수준의 정확도를 보이면서 피팅 계수가 적은 3번 모델이 더 적합한 모델이라 사료된다.

한국어 듣기 평가 문항의 선택지 제시 방법 연구

김지혜 ( Kim Jihye ),오선경 ( Oh Sunkyung ) 민족어문학회 2017 어문논집 Vol.- No.79

본 연구는 한국어 듣기 평가의 선택지 제시 방법이 평가 결과에 미치는 영향을 살펴본 연구이다. 한국어능력시험(TOPIK)을 비롯한 대부분의 한국어 듣기 평가는 선택형 평가로 실시된다. 이는 평가의 실용성과 신뢰도를 확보하기 위함이다. 그러나 한국어로 쓰여 있는 사지선다형의 선택지는 듣기 능력보다는 읽기 능력이나 어휘 및 문법 능력에 더 집중할 우려가 있어 의사소통 능력으로서의 듣기 능력을 평가하는 데에는 한계가 있어 보인다. 듣기 평가에서 평가의 타당도를 높이기 위해서는 선택형 평가보다 수행 평가가 더 적절할 것이나 이는 시행 및 관리에 있어 어려움이 따른다. 이에 본고는 평가의 실용성과 신뢰도를 유지하면서 타당도를 제고하려면, 현재의 선택지 제시 방법을 비판적으로 검토하고 듣기 평가에 적합한 선택지 제시 방법을 제안하는 것이 필요하다고 보았다. 이를 위해 중급 수준의 한국어 학습자 30명을 대상으로 선택지가 문자와 음성, 모국어와 목표어로 서로 다르게 구성된 듣기 평가를 실시하여 평가 결과가 어떻게 달라졌는지를 살펴보았으며, 피험자들의 반응 분석 및 설문을 통해 듣기 평가의 선택지가 어떤 방향으로 개선되어야 하는지를 알아보았다. 실험 결과, 선택지의 제시 방법은 평가 결과에 유의미한 영향을 미쳤으며, 듣기 능력 중 평가하고자하는 세부 능력에 따라 문항 유형의 차별화와 함께 선택지의 제시 방법도 다양화되어야 함을 발견할 수 있었다. This study investigated the effects of different presentation modes of answer options in multiple-choice questions(MCQ) in Korean listening tests. In general, Korean listening proficiency tests, such as TOPIK, consist answer options with four Korean written choices for reliability and practicality. The thing to note is that written choices will require reading ability besides listening comprehension and it causes the lack of construct validity. This study tried to show the other presentation modes, such as oral choices and test-takers` native language choices and compare the effects of them. Through the listening test and open-ended survey, the researchers investigated how the presentation modes of answer options affect the listening score and difficulty of the test. Thirty students in intermediate proficiency level participated in this study and all the test-takers shared the same first language, Chinese. The answer options of MCQ in Korean listening test were presented in three different modes, Korean Written Choices(KWC), Chinese Written Choices(CWC), Korean Oral Choices(KOC). As a result, the modes of answer options were turned out to affect the test result. The difficulty of the test was the lowest in CWC, while it was the highest in KOC. Oral choices are not familiar to the test-takes and it may introduce memory effects. The result also showed the correct rate in three modes varies with the types of question. The correct rate is very high in CWC in finding detailed information question, meanwhile some test-takers mentioned the listening-and-finding-response questions were easier in KOC. The results from this study can be used to diversify the presentation modes of answer options depending on test-takers` variance and the types of question. Eventually it will contribute to raising the test validity.