협업 기능이 추가된 직장인을 위한 익명앱의 설계

문지원 ( Ji-won Mun ),김강산 ( Kang-san Kim ),김영은 ( Yeong-eun Kim ),강다은 ( Da-eun Kang ),이제민 ( Je-min Lee ),황정민 ( Jeong-min Hwang ),이재원 ( Jae-won Lee ),김동주 ( Dongju Kim ) 한국정보처리학회 2022 한국정보처리학회 학술대회논문집 Vol.29 No.1

Covid-19의 영향으로 직접적인 만남이 줄어들고 온라인 커뮤니티의 사용량이 급격하게 증가하였다. 에브리타임은 대부분의 대학생이 사용하고 있는 가장 보편적인 온라인 커뮤니티이다. 이러한 서비스와 비슷한 방식으로 운영되어 이질감을 느끼지 않으면서도, 직장인의 특성을 고려한 설계로 취업 후에도 지속적으로 사용할 수 있는 커뮤니티 서비스를 제안한다. 이에 본 논문에서는 협업기능을 강화한 직장인을 위한 온라인 커뮤니티이자 익명서비스로 프라이버시를 보호할 수 있는 모바일앱을 설계했다.

Successful mitral repair in dogs by mitral annuloplasty using Hegar dilator: two case reports

Won-Jong Lee,Junyoung Kim,Chang-Hwan Moon,TaeHeum Eom,DongJu Son,Seungmin Lee,Haebeom Lee,Seong-Mok Jeong,Dae-Hyun Kim 대한수의학회 2022 Journal of Veterinary Science Vol.23 No.1

Mitral regurgitation (MR) is the most common heart disease in small-breed dogs. Mitral repair, which comprise artificial chorda tendineae implantation and mitral annuloplasty, has become the mainstay of treatment in the veterinary field. We report on two small dogs who underwent mitral repair surgery for MR. A Hegar dilator was used during mitral annuloplasty for accurate and reproducible surgery. In both cases, mitral regurgitant flow almost disappeared after surgery, and clinical signs improved. The treatment regimen was terminated 3 months after the surgery. We concluded that using a Hegar dilator may facilitate mitral valve repair surgery.

The Clinicopathological Characteristics of Palpable and Non-palpable Breast Cancer

Dongju Kim,Soo Jung Lee,Byung Kyun Ko,Han-Byoel Lee,Jung Han Yoon,Seok Won Lee,전예원,Bong Kyun Kim,Jina Lee,선우영 한국유방암학회 2020 Journal of Breast Disease Vol.8 No.2

Purpose: Palpability is known to be a poor prognostic factor for breast cancer. The present study analyzed the clinicopathological characteristics and outcomes of palpable and nonpalpable breast cancers using big data. Methods: Between January 2005 and May 2019, a total of 15,141 patients were enrolled. All patients were diagnosed with invasive ductal carcinomas. Patients with unclear medical records, multiple tumors, bilateral breast cancers, inflammatory breast cancers, inoperable breast cancers and distant metastasis were excluded. Patients were divided into the palpable and nonpalpable breast cancer groups based on physicians’ clinical examinations. The clinicopathological characteristics and disease-specific survivals (DSS) were analyzed. Results: Patients with palpable breast cancers were younger, had larger tumors, and higher tumor-node-metastasis stage (p<0.001) than patients with nonpalpable breast cancers. Palpable breast cancer cases had higher rates of lympho-vascular invasion, higher histologic and nuclear grades than nonpalpable breast cancer cases (p<0.001). The positive proportion of hormone receptor was higher in the nonpalpable breast cancer group than in the palpable breast cancer group, but that of human epidermal growth factor receptor 2 was higher in the palpable breast cancer group than in the nonpalpable breast cancer group (p<0.001). The Ki-67 index was higher in the palpable breast cancer group than in the nonpalpable breast cancer group (p<0.001). Total mastectomy and axillary dissection were performed more frequently in the palpable breast cancer group than in the nonpalpable breast cancer group (p<0.001). Adjuvant chemotherapy was administered more frequently in the palpable breast cancer group than in the nonpalpable breast cancer group. However, radiotherapy and hormonal therapy were performed more frequently in nonpalpable breast cancer group than in the nonpalpable breast cancer group (p<0.001). According to a multivariate analysis, younger age, lower body mass index, larger tumor size, tumor location, higher stage, higher histologic grade and higher Ki-67 index were associated with palpability (p<0.001). DSS was significantly lower in the palpable breast cancer group than in the nonpalpable breast cancer group (p<0.001). Conclusion: Palpable breast cancers tend to be triple negative breast cancers and have higher histologic grade and, Ki-67 index and worse prognosis than nonpalpable breast cancers. Therefore, based on the results of the present study, treating palpable breast cancers requires careful attention.

Gate Oxide Nitrogen Profile Engineering by Re-Oxidation in NNFC 180 nm CMOS Technology

서동주(Dongju Seo),임유리(Yuri Lim),노길선(Kil Sun Roh),김영수(Young Su Kim),이동욱(Dong Wook Lee),이원철(Won-Chul Lee),황해철(Hae chul Hwang),송종현(Jong Hyun Song),설우석(Woo-Suk Sul) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6

GroovyMarkup 확장을 이용한 SWT Builder 설계

이동주(Dongju Lee),지정훈(JungHoon Ji),장한일(Hanil Jang),우균(Gyun Woo),김원영(Won-Young Kim),최완(Wan Choi) 한국정보과학회 2005 한국정보과학회 학술발표논문집 Vol.32 No.2

Java 플랫폼 기반 스크립트 언어인 Groovy는 Java와 같은 객체지향 언어지만 Java보다 훨씬 고급 수준의 언어로서 간결한 코드와 쉬운 프로그래밍 환경을 제공한다. Groovy가 제공하고 있는 기능 중에서 GroovyMarkup은 XML 문서와 같이 각각의 객체가 중첩된 트리 구조를 다루는 응용프로그램을 쉽게 생성할 수 있도록 해준다. GUI 프로그램은 Component 및 Container 객체가 중첩된 구조로 이루어져 있으므로 GroovyMarkup을 이용하면 GUI 프로그램을 간결하고 쉽게 작성할 수 있다. 본 논문에서는 Java 플랫폼 GUI 중 최근 각광 받고 있는 SWT(Standard Widget Toolkit)를 Groovy에서 지원할 수 있게 GroovyMarkup을 확장하여 SWT Builder를 설계한다. SWT Builder는 마크업 형태로 기술한 SWT widget 이름과 속성을 SWT widget 객체와 일대일로 대응하는 구조로 설계된다. 따라서 GUI 프로그램의 골격을 구성하는 SWT Builder를 마크업 형식의 코드로 작성하고 GUI 컴포넌트 내의 이벤트 처리는 클로저(closure)를 이용함으로써 좋은 성능을 내는 GUI 프로그램을 비교적 쉽게 구성할 수 있다.

Report of the Korean Association of External Quality Assessment Service on Next-Generation Sequencing Analysis for Somatic Variants (2018–2020)

Hongkyung Kim,Dongju Won,신새암,Seung-Tae Lee,Jong Rak Choi 대한임상검사정도관리협회 2021 Journal of Laboratory Medicine And Quality Assuran Vol.43 No.2

Next-generation sequencing is widely used to detect a variety of genetic defects in many disorders. The detection of somatic variants in patients with cancer, including hematologic malignancy, is important for diagnosis, treatment, and prognosis. However, due to the complicated process, accurate and reliable detection of somatic variants by next-generation sequencing remains challenging. We investigated the proficiency tests conducted by the Korean Association of External Quality Assessment Service from 2018 to 2020 and their effects on the analytical performance of clinical laboratories. During the 3-year study period, six rounds of proficiency tests were conducted. In each round, the participating laboratories were required to report Tier I/ II somatic variants detected from electronic data and a DNA specimen. The analytical performance was evaluated by calculating the acceptance rate for each genomic position investigated. The possible causes of ‘nonevaluable’ and ‘unacceptable’ variants were also explored. Among the six rounds of proficiency tests, the acceptance rates for all tested variants were above 80% and acceptance rates of 100% were identified in more than half of the variants in the target regions. Issues of variant classification and falsenegative variants were addressed through the analysis of ‘non-evaluable’ variants. The significant causes of ‘unacceptable’ variants were identified as wrong protein or nucleotide numbering. In conclusion, the proficiency tests demonstrated the good analytical performance of the participating clinical laboratories. Although the findings identified some problems awaiting solutions, the proficiency tests may help clinical laboratories to improve their performance in detecting somatic variants by next-generation sequencing.

다계층 멀티미디어 스트리밍을 위한 의미기반 패킷 스케줄링

원유집(Youjip Won),전영균(Yeonggyun Jeon),박동주(Dongju Park),정제창(Jechang Jeong) 한국정보과학회 2006 정보과학회논문지 : 시스템 및 이론 Vol.33 No.10

계층적 압축 기법을 지원하는 스트리밍 시스템 응용은 제한된 네트워크 자원의 효과적인 활용과 사용자가 느끼는 화질을 최대로 해야 한다. 이를 위해서는 적절한 전송 계층의 선택 및 패킷 인터벌 결정이 이루어져야 한다. 본 논문에서는 계층이 갖는 화질의 영향력을 바탕으로 패킷 인터벌 결정 및 계층 선택 알고리즘 SAPS를 제시한다. 인터-프레임 압축 기법을 사용하는 비디오 스트리밍 시스템에서 패킷 손실의 감소만으로는 재생 화질의 향상을 이룰 수 없고, 재생 화질에 높은 영향력을 가진 패킷의 복원율이 높아질 때, 비로소 재생 화질이 향상된다. SAPS는 패킷의 의존성 그래프를 바탕으로 전송 계층을 결정하며, 이렇게 결정된 전송 계층은 사용자가 느끼는 서비스의 품질을 최대로 만든다. 또한, 선택된 계층에 대한 패킷의 인터벌 조절을 통해 계층 선택에 의한 효과가 유지되도록 한다. 실험을 통해 SAPS 알고리즘이 사용자가 느끼는 서비스 품질의 향상뿐만 아니라, 네트워크 자원 활용도 효과적으로 이루고 있음을 보여준다. In scalable streaming application, there are two important knobs to tune to effectively exploit the underlying network resource and to maximize the user perceivable quality of service(QoS): layer selection and packet scheduling. In this work, we propose Semantics Aware Packet Scheduling(SAPS) algorithm to address these issues. Using packet dependency graph, SAPS algorithm selects a layer to maximize QoS. We aim at minimizing distortion in selecting layers. In inter-frame coded video streaming, minimizing packet loss does not imply maximizing QoS. In determining the packet transmission schedule, we exploit the fact that significance of each packet loss is different dependent upon its frame type and the position within group of picture(GOP). In SAPS algorithm, each packet is assigned a weight called QoS Impact Factor. Transmission schedule is derived based upon weighted smoothing. In simulation experiment, we observed that QoS actually improves when packet loss becomes worse. The simulation results show that the SAPS not only maximizes user perceivable QoS but also minimizes resource requirements.

Demographic and Clinical Characteristics of Primary Frozen Shoulder in a Korean Population

Chul-Hyun Cho,Tae Won Koo,Nam-Su Cho,Kyoung-Jin Park,Bong Gun Lee,Dongju Shin,Sungwook Choi,Seung-Hyun Cho,Myung-Sun Kim,Sang-Hun Ko,Chul-Hong Kim,Jin-Young Park,Yon-Sik Yoo 대한견주관절의학회 2015 대한견주관절의학회지 Vol.18 No.3

Background: The aim of this study was to investigate the demographic and clinical characteristics of patients with primary frozen shoulder in a Korean population. Methods: A total of 1,373 patients whose shoulders were diagnosed with primary frozen shoulder across 11 resident-training hospitals were reviewed retrospectively. Various demographic characteristics and clinical characteristics according to gender and presence of diabetes were evaluated. Results: The average age of patients was 55.4 years. Gender proportion was 58.3% females and 41.7% males. The frozen shoulder involved the non-dominant arm in 60.7% of patients and the bilateral arms in 17.6% of patients. The average duration of symptoms was 8.9 months, and 51.3% of patients had experienced nocturnal pain. Comorbidities associated with frozen shoulder in our sample of patients included diabetes (18.7%), cardiovascular diseases (17.7%), thyroid diseases (5.4%), and cerebrovascular diseases (3.6%). The diabetic group was correlated with the following demographic and clinical characteristics: old age, involvement of the dominant arm, nocturnal pain, long duration of symptoms, and no history of trauma. Further, we found that, in males, having a frozen shoulder was significantly correlated with a history of trauma; in females, having a frozen shoulder was significantly correlated with having thyroid diseases. Conclusions: These demographic data of primary frozen shoulder in the Korean population were consistent with those of previously reported epidemiologic studies. Primary frozen shoulder with diabetes was correlated with old age, bilateral involvement, long duration of symptoms, and nocturnal pain.

스크립트 언어 비교 : 프로그래밍 편의성 관점에서

장한일(Hanil Jang),이동주(Dongju Lee),지정훈(JungHoon Ji),우균(Gyun Woo),김원영(Won-Young Kim),최완(Wan Choi) 한국정보과학회 2005 한국정보과학회 학술발표논문집 Vol.32 No.2

스크립트 언어는 모듈의 결합이나 조정 등의 여러 목적으로 쓰이고 있는 언어이다. 스크립트 언어는 사용의 편리함과 높은 생산성으로 인해 널리 사용되고 있다. 그러나 현재 너무나 많은 스크립트 언어가 개발 · 제시되고 있어 프로그래머가 스크립트 언어를 선택해야 할 때 어떤 언어를 선택해야 할지 판단하기 힘든 실정이다. 이에 본 논문에서는 프로그래밍 편의성 관점에서의 비교 기준을 제시하고 대표적인 스크립트 언어(VB script, Ruby, Perl, Python, Tcl, Lua, Groovy)를 이 기준에 따라 비교하였다. 비교 결과 각 비교 분야에 강점을 보이는 언어를 발견하였다. 본 논문의 결과는 스크립트 언어를 선택하는데 도움이 될 것이다.

Antiplatelet Constituent Isolated from Thujopsis dolabrata var. hondai

Park YoungHyun,Yun YeoPyo,Won EunKyung,Lee SungEun,Park ByeoungSoo,Son DongJu 大韓藥學會 2003 大韓藥學會 總會 및 學術大會 Vol.2003 No.1