오픈 소스 기반 5G 액세스 네트워크 보안 취약점 자동 검증 프레임워크

정제원,신재민,이수기,김유성 한국정보과학회 2023 정보과학회논문지 Vol.50 No.6

최근 5G 표준 기반의 다양한 오픈 소스들이 등장했고, 5G 제어 평면의 보안 취약점을 찾는 연구에 널리 사용되고 있다. 그러나 이를 활용하기 위해선 복잡한 소스 코드와 무선 통신 기기 및 방대한 5G 보안 표준에 대한 지식을 요구한다. 이에 본 논문에서는 5G 제어 평면의 보안 취약점을 자동 검증하기 위한 프레임워크를 제안한다. 본 프레임워크는 상용 Software Defined Radio (SDR) 장비와 오픈 소스 소프트웨어를 활용해 5G 네트워크 테스트베드를 구축하고, Man-in-the-Middle (MitM) 공격자를 구현해 제어 평면 공격 테스트베드를 구축한다. 또한 제어 평면 메시지 디코딩 및 수정 모듈을 구현해 메시지 Spoofing 공격을 실행해보고, 5G 네트워크의 보안 취약점을 자동으로 분류한다. 추가로 그래픽 인터페이스 기반 Web UI를 구현해 이용자가 직접 MitM 공격 시나리오를 생성하고 검증 결과를 확인할 수 있도록 한다.

경주지진의 관측지반진동을 이용한 지진원 및 지진파 전달 특성 연구

정제원,오태석,김준경 대한지질학회 2004 대한지질학회 학술대회 Vol.2004 No.

Metabolomic Studies in Apis mellifera

정제원 한국양봉학회 2023 韓國養蜂學會誌 Vol.38 No.2

The application of metabolomic analysis has emerged as a potent tool for exploring honeybee physiology. This technique enables researchers to detect thousands of chemical compounds simultaneously in a single sample, which represent a combination of gene expression, enzyme activity, and environmental factors. The utilization of metabolomics has facilitated a broad range of investigations in honeybees, yielding novel insights into gene function and metabolic status that would otherwise be unattainable. The present review outlines the applications of metabolomic analysis since its introduction in the field, while also discussing the main techniques employed for metabolomic studies in honeybees. Furthermore, we identify and highlight the new avenues for future research in this field.

Diagnosis of Right Ventricular Vegetation on Late Gadolinium- Enhanced MR Imaging in a Pediatric Patient after Repair of a Ventricular Septal Defect

정제원,김해진,김성목,허준,양지혁,최연현 대한자기공명의과학회 2016 Investigative Magnetic Resonance Imaging Vol.20 No.2

We report a case of vegetation in a 4-year-old female with infective endocarditis, diagnosed by late gadolinium-enhanced (LGE) cardiovascular magnetic resonance (CMR) imaging. The patient had a history of primary closure for ventricular septal defect and presented with mild febrile sensation. No remarkable clinical symptoms or laboratory findings were noted; however, transthoracic echocardiography demonstrated a 14 mm highly mobile homogeneous mass in the right ventricle. On LGE CMR imaging, the mass showed marginal rim enhancement, which suggested the diagnosis of vegetation rather than thrombus. The extracellular volume fraction (≥ 42%) of the lesion was higher than that of normal myocardium. Based on the patient’s clinical history of congenital heart disease and pathologic confirmation of the lesion, a diagnosis of infective endocarditis with vegetation was made.

Functional characterization of sugar receptors in the western honeybee, Apis mellifera

정제원,박건웅,안용준,권형욱 한국응용곤충학회 2015 Journal of Asia-Pacific Entomology Vol.18 No.1

The sense of taste is responsible for the choice of profitable food sources and nestmate recognition in honeybees. Taste detection for food sources occurswithin cuticular hairs located on the antennae, on the mouthparts, and on the tarsi of the forelegs. The gustatory sensilla,which are composed of cuticular hair, respond to sugars, salts, and amino acids. In the honey bee, although sugar detection is a crucial factor in determining the acceptability of nectar and pollen for collection, little is known about the molecular and neural correlates underlying sugar perception. Here we identified the function of sugar receptors in Apis mellifera that is most closely related with sugar receptors in Drosophila melanogaster such as DmGr64a-f and DmGr5a. We determined that gustatory receptor 1 of A. mellifera (AmGr1) responded to sucrose, glucose, trehalose, and maltose in a dose-dependent manner, and that the expression patterns of AmGr1 and AmGr2 are distinct from those in Drosophila. AmGr1 alone showed full functionality, but it showed different sensitivity from a heterodimer of AmGr1 and AmGr2. That is, co-expression of AmGr1 and AmGr2 demonstrated higher sensitivity to glucose and lower sensitivity to sucrose, trehalose, and maltose compared with AmGr1 expression alone. AmGr1 and AmGr2 were co-localized or not in the antennal neurons, and especially AmGr1 was highly expressed at the distal segment of the antennae. Our study suggests that sugar receptors of the honey bee function as heterodimers (or monomer or mono-dimers), indicating that AmGr2 is required for providing honeybees with variability of sugar perceptions.

어깨 통증의 역학 및 원인: 보건의료빅데이터개방시스템 의료통계정보를 기반으로

정제원,손민수 대한의사협회 2022 대한의사협회지 Vol.65 No.11

Background: The study investigated the current epidemiologic and etiologic trends of shoulder pain over the past 10 years in South Korea. Current Concepts: From 2011 to 2020, nationwide health statistics data of the following diseases and soft tissue damage codes related to shoulder pain were extracted from the Healthcare Bigdata Hub.M75, S43, and S46. The annual changes in total medical cost and the number of patients with the three codes were extracted. The crude and age-standardized prevalence rates, and the annual percentage change were analyzed to characterize trends in prevalence rates over time. Changes in the proportion of medical cost by age, hospital type, and outpatient/inpatient distribution were also analyzed. Among the three codes, a significant increase in total medical cost, crude and age-standardized prevalence was observed only for the code M75. Additionally, in the distribution of total medical cost for the code M75 by age, the increase in the number of patients of the age group of 60 to 69 years was remarkable. The total medical cost gradually decreased at the clinic level and showed a remarkably increasing trend at the hospital level. This pattern is consistent with those of rotator cuff disease (M751), a representative disease of shoulder lesions. Discussion and Conclusion: The age of patients with shoulder pain appears to be increasing. Considering this trend of change in health statistics on shoulder pain in Korea, socioeconomic support and improvement of health policy regarding the distribution of medical expenses and resources for shoulder pain will be more necessary in the future.

Acute diverticulitis of the terminal ileum: ultrasonography and CT findings

정제원,홍성숙,황지영,김현주,장윤우 대한초음파의학회 2015 ULTRASONOGRAPHY Vol.34 No.1

We describe a rare case of terminal ileal diverticulitis in a 68-year-old female with a day of history of right lower quadrant pain and tenderness, mimicking acute appendicitis. Ultrasonographyrevealed small sac-like out-pouching lesions with increased echogenicity of surrounding fat in thickened terminal ileum, suggesting inflamed diverticula. We diagnosed terminal ilealdiverticulitis primarily by ultrasonography. The diagnosis was confirmed by subsequent computed tomography.

경주지역에서 발생한 3개 지진의 지진원 및 지진파전파 매질특성에 관한 연구

정제원,김준경 한국지진공학회 2006 한국지진공학회논문집 Vol.10 No.1

본 연구는 경주부근에서 일어난 3개의 지진 (1999년 4월 24일, 규모 3.3, 6개 관측소; 1999년 6월 2일, 규모 4.0, 14개 관측소; 1999년 9월 12일, 규모 3.2, 7개 관측소)으로부터 27개의 관측된 지반진동 자료를 이용하여 지진원 및 지진파감쇄특성 변수값을 분석하였다. 본 연구에서는 구하고자 하는 모든 값을 동시에 비선형적으로 분석하기 위해 LM (Levenberg -Marquardt) 역산방법을 적용하였고 전단파 에너지를 이용하였다. 3개지진의 평균 응력강하값은 약48-bar이고 본 연구에 이용된 모든 관측소 부지부근 지진파감쇄 {\kappa}값의 평균은 0.0312-sec로 분석되었다. 또한 광역 지진파감쇄값인 Qo 과 {\eta}값은 각각 417 및 0.83으로 분석되었다. 특히 지진파감쇄 {\kappa}값은 미국 동부지역 대푯값 보다 훨씬 크고 미국 서부지역 대푯값 보다 약간 작은 값을 보여주고 있어 관측소 부지증폭 특성에 대한 분석자료가 있으면 보다 의미있는 결과를 얻을 수 있다고 판단된다. 본 연구에서 분석된 지진원 및 지진파감쇄 특성 변수값들은 지배방정식의 차이 등으로 인해 기존의 연구결과와 일부 파라메타값에 있어서 다소 커다란 차이를 보여주고 있다. Parameters including the seismic sources and the elastic wave propagation characteristics were analysed using the observed ground motions from 3 Kyoungju region earthquakes. The Levenberg-Marquardt algorithm was applied to invert all the variables non-linearly and simultaneously with S wave energy In frequency domain. Average stress drop of 3 events and local attenuation parameter {\kappa} were estimated to about 48-bar and 0.0312 respectively. Regional attenuation parameter, Qo and {\eta}, were also estimated to be about 417 and 0.83. {\kappa} values are much higher than that of EUS, even though smaller than that of WUS. All these values resultant from this study show that there are differences in some parameters of other studios due to differences in the governing equation. of acceleration motions

Successful management of a chronic post-surgical gastrocutaneous fistula using as a route for enteral feeding tube placement: A case report

정제원 소화기인터벤션의학회 2022 International journal of gastrointestinal interven Vol.11 No.4

Gastrocutaneous fistula is a rare complication of gastric surgery and difficult to manage. Because only 6% of cases close spontaneously, surgical or endoscopic repair is usually required. However, in older patients who are often ineligible for aggressive treatment, more conservative treatment options are needed. Herein, we report a case of a chronic gastrocutaneous fistula secondary to distal gastrectomy with Roux-en-Y gastrojejunostomy performed 5 years prior that was managed with intestinal feeding tube insertion through the fistula tract.

Successful management of a chronic post-surgical gastrocutaneous fistula using as a route for enteral feeding tube placement: A case report

정제원 소화기인터벤션의학회 2022 Gastrointestinal Intervention Vol.11 No.4

Gastrocutaneous fistula is a rare complication of gastric surgery and difficult to manage. Because only 6% of cases close spontaneously, surgical or endoscopic repair is usually required. However, in older patients who are often ineligible for aggressive treatment, more conservative treatment options are needed. Herein, we report a case of a chronic gastrocutaneous fistula secondary to distal gastrectomy with Roux-en-Y gastrojejunostomy performed 5 years prior that was managed with intestinal feeding tube insertion through the fistula tract.