• Title/Summary/Keyword: Woosung Jung

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The study on Grabber of Restoration worker for Dispersion relay (중계기점검자동복구기 Grabber에 관한 연구)

  • Chun, Jung-Ham;Park, Jong-Tack;Kim, Il-Jung
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • 2012.04a
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    • pp.147-150
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    • 2012
  • This study restoration worker for dispersion relay in R-Type fire alarm system. Restoration worker very good instrument for an fire system inspector. When inspector check for fire system someone need reset for fir system to normal state. This chain of action is frequent and troublesome. In this case, If we can automatic reset for fire system it's restoration worker. This paper settlement on the problem for reset fire system. Design, make grabber for restoration worker. The test offer proof possibility restoration worker.

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Improvement of position accuracy of geocoded coordination based on Ensemble method (앙상블 방법론 기반 지오코딩 위치정확도 향상 기법 연구)

  • Lee, Taemin;Choi, Woosung;Jung, Soonyoung
    • Proceedings of the Korea Information Processing Society Conference
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    • 2016.04a
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    • pp.818-819
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    • 2016
  • 지오코딩(Geocoding)은 자연어로 표현된 주소를 컴퓨터가 인지 가능한 (x,y) 좌표로 변환하는 과정이며, 지리정보 분석 등 다양한 영역의 필수적인 전처리 과정에서 사용된다. 현재 국내 주소를 지오코딩하는 API를 제공하는 서비스 프로바이더는 다수 존재하나, 성능 향상의 여지가 남아있는 현황이다. 본 연구에서는 지오코딩 위치정확도의 향상을 위해 Euclidean/Edit distance 기반 앙상블(Ensemble) 지오코딩 알고리즘(EEE-Geocoding)을 제안하였다. 화학물질 보유 업체 5569개소의 주소를 토대로 제안 기법에 대한 성능평가 실험을 진행하였으며, 평가결과는 0.99 precision, 0.87 recall, 0.92 F1 score 이었다.

Design and Implementation of a Data Extraction Tool for Analyzing Software Changes

  • Lee, Yong-Hyeon;Kim, Kisub;Lee, Jaekwon;Jung, Woosung
    • Journal of the Korea Society of Computer and Information
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    • v.21 no.8
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    • pp.65-75
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    • 2016
  • In this paper, we present a novel approach to help MSR researchers obtain necessary data with a tool, termed General Purpose Extractor for Source code (GPES). GPES has a single function extracts high-quality data, e.g., the version history, abstract syntax tree (AST), changed code diff, and software quality metrics. Moreover, features such as an AST of other languages or new software metrics can be extended easily given that GPES has a flexible data model and a component-based design. We conducted several case studies to evaluate the usefulness and effectiveness of our tool. Case studies show that researchers can reduce the overall cost of data analysis by transforming the data into the required formats.

Analyzing Developer's Share of Code Based on Abstract Syntax Tree (추상 구문 트리 기반의 개발자별 소스 코드 지분 분석)

  • Lee, Yong-hyeon;Kim, KiSub;Jung, Woosung
    • Proceedings of the Korean Society of Computer Information Conference
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    • 2015.07a
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    • pp.23-24
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    • 2015
  • 소프트웨어 프로젝트에서 발생하는 버그의 수가 증가함에 따라 이를 수정할 적합한 개발자를 효과적으로 찾기 위한 연구들이 진행되었다. 하지만, 대부분의 연구들이 텍스트 기반의 라인 변경을 통해 얻은 정보만을 활용하기 때문에 정확도가 떨어지며, 파일, 클래스, 함수와 같은 다양한 계층 단위에 대한 처리가 어렵다. 본 논문은 개발자의 코드 변경 정보를 추적함으로써 기여도를 보다 정확하게 계산하고, 다양한 코드 수준에서의 분석을 효과적으로 지원하는 AST기반의 지분 계산 접근법을 제안한다.

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Phoneme-level Embedding based Korean Language Model (음소 단위 임베딩 기반 한국어 모델)

  • Choi, Woosung;Hyun, Kyungseok;Chung, Jaehwa;Jung, Soon Young
    • Proceedings of the Korea Information Processing Society Conference
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    • 2019.10a
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    • pp.1026-1029
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    • 2019
  • 최근 제안되고 있는 Bert 등의 딥러닝 언어 모델 기반 pre-training 기법은 다양한 NLP 분야에서 활용되고 있다. 텍스트로 작성된 데이터 셋을 딥러닝 언어 모델이 학습하기 위해서는 토크나이징(tokenizing) 기술이 필요하다. 그러나 기존 토크나이징 방식은 한국어 및 한글이 가지는 고유한 특성(교착어적 특성과 모아쓰기 반영)을 반영하기 어렵다는 한계를 가지고 있다. 본 논문에서는 한국어와 한글이 가지는 고유한 특성을 고려하기 위하여 음소 단위의 임베딩 기법을 제안하며, 이를 기반으로 언어 모델을 설계 및 구현한다. 또한 음소 단위 임베딩 기반 한국어 모델이 실제 데이터 집합(구약성서)에서 나타나는 언어적 패턴을 학습할 수 있다는 것을 실험을 통하여 밝힌다.

Sentimental Analysis using the Phoneme-level Embedding Model (음소 단위 임베딩 모형을 이용한 감성 분석)

  • Hyun, Kyeongseok;Choi, Woosung;Jung, Soon-young;Chung, Jaehwa
    • Proceedings of the Korea Information Processing Society Conference
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    • 2019.10a
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    • pp.1030-1032
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    • 2019
  • 형태소 분석을 통하여 한국어 문장을 형태소 단위의 임베딩 및 학습 관련 연구가 되었으나 최근 비정형적인 텍스트 데이터의 증가에 따라 음소 단위의 임베딩을 통한 신경망 학습에 대한 요구가 높아지고 있다. 본 논문은 비정형적인 텍스트 감성 분석 성능 향상을 위해 음소 단위의 토큰을 생성하고 이를 CNN 모형을 기반으로 다차원 임베딩을 수행하고 감성분석을 위하여 양방향 순환신경망 모델을 사용하여 유튜브의 비정형 텍스트를 학습시켰다. 그 결과 텍스트의 긍정 부정 판별에 있어 90%의 정확도를 보였다.

A Statistical Analysis to the VLF Tanδ Criteria for Aging Diagnosis in Power Cables (전력케이블 열화진단을 위한 극저주파 탄델타 판정기준의 통계적 해석)

  • Jung, Woosung;Kim, Seongmin;Lim, Jangseob;Lee, Jin
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.33 no.1
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    • pp.1-5
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    • 2020
  • In this study, the objective is to improve the criteria used for statistical comparison of the VLF tanδ (TD) database and failure rate according to water-tree degradation in underground distribution power cables. The aging condition of the KEPCO criteria is divided into 6 levels using the Weibull distribution, and the "failure imminent" condition is quantified by using the statistical end-point of the lifetime parameter of the VLF big-data group obtained from KEPCO. Moreover, new criteria with a 2-dimensional combination of TD, DTD, and a statistical normalized factor are suggested. These criteria exhibit high reproducibility for the detection of cables in an imminent failure state. Consequently, it is expected that the adoption of the extended VLF-2019 criteria will reduce the asset management cost of cable replacement compared to the VLF-2012 criteria of KEPCO.

RF Seeker Measurement modeling using ISAR Image (ISAR 영상을 이용한 RF탐색기 측정치 모델링)

  • Ha, Hyun-Jong;Park, Woosung;Jung, Ki-Hwan;Park, Sang-Sup;Koh, Il-Suek;Ryoo, Chang-Kyung
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.43 no.1
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    • pp.40-48
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    • 2015
  • In this paper, we suggest a measurement modeling of the RF seeker using the ISAR(Inverse Synthetic Aperture Radar) image. Reference scattering points are extracted first from ISAR images which are changed according to target attitude. And then uncertainties included in RF seeker measurement such as noise strength, blink, and boresight error are added to the reference scattering points. The proposed measurement model of the RF seeker can be used to develop various kinds of target tracking algorithms.

Uncertainty Assessment of Regional Frequency Analysis for Generalized Logistic Distribution (Generalized Logistic 분포형을 이용한 지역빈도해석의 불확실성 추정)

  • Shin, Hongjoon;Nam, Woosung;Jung, Younghun;Heo, Jun-Haeng
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.28 no.6B
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    • pp.723-729
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    • 2008
  • Confidence intervals of growth curves are calculated to assess the uncertainty of index flood method as a regional frequency analysis. The asymptotic variance of quantile estimator for the generalized logistic distribution is introduced to evaluate confidence intervals. In addition, the variances of at-site frequency estimator and regional frequency estimator are used to evaluate an efficiency index. The efficiency indexes for 14 homogeneous regions based on 378 stations show that index flood method estimators are more efficient than at-site frequency estimators. It is shown that the number of sites in a region needs to be limited for regional gain.

Clinical Outcomes of 48 Pet Ferrets with Adrenal Disease (부신질환을 지닌 애완 페렛 48마리의 임상적 결과)

  • Jung, Ji-Won;Choi, Young-Min;Yoon, Hun-Young;Jeong, Soon-Wuk
    • Journal of Veterinary Clinics
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    • v.31 no.5
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    • pp.389-393
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    • 2014
  • Medical records of 48 pet ferrets that underwent adrenalectomy were retrospectively reviewed to investigate the frequency and clinical outcomes of adrenal diseases in pet ferrets. These diseases were most commonly diagnosed in ferrets aged 3 to 5 years and in neutered females (58.3%). Adrenal disease occurred most frequently in the left adrenal gland (72.9%), followed by involvement of both adrenal glands (16.7%) and the right adrenal gland (10.4%). The mean sizes (length * thickness) of the adrenal glands as determined by ultrasonography were 8.96 * 5.08 mm and 12.91 * 8.26 mm for the left and right adrenal glands, respectively. In the ferrets with adrenal disease, alopecia (82.2%) was the main presenting clinical signs in both sexes, and vulvar swelling was seen in 32.1% of the females with adrenal disease. The common incidental findings included renal cysts (29.2%) and splenomegaly (25.0%). Histological findings showed pheochromocytoma, adenoma, and hyperplasia in 44.7%, 14.9%, and 12.8% of cases, respectively. The survival rates at 1- and 2- years after surgery were 87.5% and 74.0%, respectively. Alopecia and vulvar swelling improved within an average of 3.4 months and 12 days after surgery.