분변 감입을 동반한 무증상의 심한 소아변비 치험례

정지은,장인수,정민정,Jeong, Ji Eun,Jang, In Soo,Jeong, Min Jeong 대한한방소아과학회 2020 대한한방소아과학회지 Vol.34 No.4

Objectives The purpose of this study is to report the case of fecal impaction in a child without any abdominal symptoms treated by taking herbal medicine. Methods We examined a 7-year-old girl who had normal bowel movement and defecation per day, and had no particular abdominal symptoms. Abdominal radiography was taken, and unexpected severe fecal impaction was observed throughout the abdominal cavity, filled with intestinal gas and feces. According to the subject's parents, she had no generalized symptoms, such as abdominal pain or distension, and had on a regular diet and normal bowel movement daily. She was treated with herbal medicine (Daeseunggi-tang) for 23 days. While she was on the therapy, numbers, doses, bowel movements, and radiography were checked and recorded. Results During the treatment, her stool was softened, and fecal impaction was relieved as showed by abdominal radiography. Conclusions We have identified that there are cases where subjects have no symptoms of abdominal pain, despite presence of severe fecal impaction. In addition, it was found that Daeseunggi-tang is effective in fecal impaction in childhood.

신생아 선별검사를 통해 진단된 1형 타이로신혈증의 NTBC 치료 사례 보고

정지은,김화영,고정민,Ji Eun Jeong,Hwa Young Kim,Jung Min Ko 대한유전성대사질환학회 2023 대한유전성대사질환학회지 Vol.23 No.2

Hereditary tyrosinemia type 1 (HT-1) is a metabolic disorder caused by biallelic pathogenic variants in the fumarylacetoacetate hydrolase (FAH) gene, which impairs the function of the FAH enzyme, resulting in the accumulation of tyrosine's toxic metabolites in hepatocytes and renal tubular cells. As a consequence, individuals with HT-1 exhibit symptomatic manifestations. Rapid diagnosis and treatment of HT-1 can prevent short-term death and long-term complications. A 15-day-old boy presented to the outpatient department with elevated levels of tyrosine on his newborn screening tests conducted at the age of 3 and 10 days, respectively. Further blood tests revealed increased levels of alpha-fetoprotein and amino acids including tyrosine and threonine. Urine organic acid tests indicated a significant elevation in tyrosine metabolites, as well as the presence of succinylacetone (SA), which led to the diagnosis of HT-1. Two pathogenic and likely pathogenic variants of FAH compatible with HT-1 were also detected. He began a tyrosine-restricted diet at one month old and received nitisinone (NTBC) at two months old. With continued treatment, the patient's initially elevated AFP level, detection of SA in the urine, and mild hepatomegaly showed improvement. During four years and seven months of treatment, there were no exceptional complications apart from an increase in tyrosine levels and a delay in speech. We report a case of tyrosinemia type 1 detected through newborn screening, treated with dietary restriction and NTBC, with a good prognosis.

위 내 이물로 오인한 석회화 섬유 종양 1예

정지은,이경훈,성현정,조창호,Jeong, Ji-Eun,Lee, Kyung-Hun,Sung, Hyun-Jung,Cho, Chang-Ho 대한소아소화기영양학회 2009 Pediatric gastroenterology, hepatology & nutrition Vol.12 No.1

평소 복부 팽만을 보인 2세 남아가 내원 3일 전부터 간헐적인 구토를 동반하여 시행한 복부 방사선 사진에서 좌상복부에서 석회화 소견을 관찰하여 상부 위장관내시경과 복부 전산화 단층 사진을 시행하였다. 술 후 병리 검사에서 상당히 빈도가 드문 석회화 섬유 종양을 발견하였기에 보고하는 바이다. Calcifying fibrous tumors (CFTs) are unusual benign tumors of childhood, located primarily in soft tissues, pleura, and peritoneum. The cause and pathogenesis are unclear. We report a rare case of a CFT in a 2-year-old boy who presented with vomiting and abdominal distension. An abdominal X-ray showed an elliptical, calcific shadow in the LUQ area mimicking a foreign body. An internally protruding mass along the lesser curvature of the gastric body was an incidental finding during upper endoscopy, biopsies of which were negative. Abdominal CT showed a 4.5${\times}$3.2 cm soft tissue mass of the gastric wall with calcifications. A diagnosis of gastric submucosal mass was suspected and a wedge resection of the stomach was performed. On microscopic examination, the tumor was composed of whorls of dense hyalinized collagen bundles with a few fibroblasts. There were also amorphous dystrophic calcifications and nodular aggregates of mononuclear inflammatory cells. Immunohistochemically, spindle cells did not stain for anaplastic lymphoma kinase-1 (ALK-1), CK, smooth muscle actin (SMA), or desmin. Taken together, the mass was compatible with a CFT of the gastric wall. This is the first reported case of CFT in a Korean child.

거래의 종류에 따른 인터랙션 요소 및 속성 도출에 관한 연구

정지은(Jeong, Ji Eun),반영환(Pan, Young Hwan) 한국디지털디자인협의회 2014 디지털디자인학연구 Vol.14 No.3

최근 사회 문화의 변화와 디지털 기기의 스마트 화 된 기능으로 인해 다양한 방식의 거래 관련 서비스가 개발되고 있다. 현재의 거래는 오프라인에서의 재래시장이나 마켓을 이용한 거래에서부터 디지털 기기를 이용한 온라인 마켓의 거래 등 여러 가지 거래의 형태를 지닌 거래의 종류가 존재한다. 본 연구에서는 이러한 거래의 종류를 통하여 거래에서 발생하는 인터랙션의 요소와 속성을 도출하는데 목적을 두고 진행되었다. 우선, 시간의 흐름에 따라 변화 된 거래의 종류에 대해 알아보았다. 원시시대부터 거래의 가장 기본 방식이 되었던 물물교환의 거래부터 현대의 디지털 기기를 이용한 정보의 거래까지, 거래의 특성에 따라 온/오프라인에서의 사물 거래와 화폐 및 뱅킹 거래, 디지털 기기를 이용한 디지털 정보거래, 디지털 거래에서 파생된 형태의 거래로 특성에 다라 나누었다. 다음으로 정리된 거래의 종류를 기반으로 거래에 관한 기본 개념을 도식화하여, 종류에 따른 거래의 인터랙션 요소를 추출하여 해당 요소에 따른 인터랙션 속성을 도출하였다. 본 연구는 그 동안 거래 관련된 많은 연구들이 경제, 경영, 법에 관련된 연구가 주된 분야이었던 것과 달리, ‘주고받음’, ‘돈을 주고 물건을 구입함’, ‘상대방에게 정보를 주고 정보를 받음’ 등의 거래의 가장 기본이 되는 거래의 개념을 알아보고, 그 속에 녹아 있는 인터랙션의 요소와 속성을 도출하여 향후 거래에 관한 인터랙션 연구 분야와 더불어 다양한 거래 관련 연구 범위의 확대를 위한 자료로 활용 되는데 의의를 찾을 수 있다. Recently, services related to ‘Commerce’ are developed because of the smart functions of digital devices and culture changes of society. There are various existing types of commerce such as Offline, conventional market and Online market using digital devices. This study has been carried out in order to deduce interaction factors and characteristics occurred during the process of these commerce. Above all, Commerce which has been changed according to the passage of time was studied. I have classified the types of commerce according to the characteristics of commerce such as barter, the initial trading method of ancient times, the commerce of information using digital devices in the modern society and digital information commerce using digital devices from digital field. And then, I have schematized the basic concepts of commerce based on the classification of commerce to deduce the interaction factors according to the commerce. Many studies have focused on the economy, management and laws regarding the commerce. However, this study focuses on basic concepts of commerce such as ‘Give and Take’ ‘Buy goods after paying’, ‘Give and Take information’ and then deduce the interaction factors and characteristics in order to utilize the materials to expand the scope of study related to commerce in the future.

유리알에 코팅된 TiO₂ 박막의 구조 및 광촉매 특성

정지은 ( Ji Eun Jeong ),이창용 ( Chang-yong Lee ) 한국공업화학회 2023 공업화학 Vol.34 No.1

TiO₂ 졸을 사용하여 유리알 표면에 TiO₂ 코팅한 후 건조 처리한 시료(TB)와 소성한 시료(TBc)를 제조하였다. 이들 시료에 대한 TiO₂ 박막의 특성분석과 메틸렌블루 및 톨루엔의 광분해 실험을 수행하였다. FE-SEM, XPS 및 FTIR 분석 결과, TB 시료의 TiO₂ 박막은 스펀지 폼과 같은 형태이며 무정형 TiO₂와 일부 결정형 TiO₂가 존재하였다. TBc 시료의 TiO₂ 박막에는 결정형 TiO₂가 주로 존재하며 침상형 입자와 미세 입자들이 혼재하였다. TBc 시료(46 mg/g)의 톨루엔 흡착량은 같은 코팅량의 TB 시료 대비 적었으나 톨루엔 분해율은 비슷했다. TB 시료의 경우, TiO₂ 코팅량이 증가함에 따라 톨루엔 분해능이 흡착능에 비해 적게 감소하였다. 이러한 결과는 소성하지 않은 TB 시료는 TiO₂ 코팅량이 증가하면 무정형 텍스처의 비표면적은 감소하는 반면 결정성 입자들의 활성점 감소는 적게 일어나기 때문으로 판단된다. The glass bead surface was coated using a TiO₂ sol, after which dry-treated (TB) and calcined (TBc) samples were prepared. Photocatalytic degradation of methylene blue and toluene, as well as characterization of the TiO₂ thin films, were carried out. The TiO₂ thin film of the TB sample had the same shape as the sponge foam, according to FE-SEM, XPS, and FTIR analyses, and contained both amorphous and crystalline TiO₂. On the other hand, crystalline TiO₂ was mainly present in the TiO₂ thin film of the TBc sample, and needle-shaped particles and tiny ones were mixed. The adsorption capacity for methylene blue and the degradation rate of the TBc sample were less than 10 % compared with those of the TB sample, and the adsorption capacity and degradation rate of the TBc sample decreased similarly as the amount of TiO₂ coating increased. The amount of toluene adsorption for the TBc sample (46 mg/g) was smaller than that of the TB sample with the same coating amount, but the degradation rate was similar. In the case of the TB sample, the degradation rate for toluene decreased less than the adsorption capacity as the amount of TiO₂ coating increased. This result is considered to be because, in the non-calcined TB sample, the active site reduction of the crystalline particles occurred less and the specific surface area of the amorphous texture decreased as the amount of TiO₂ coating increased.

NO, CO, VOC 동시 제거를 위한 MnFeOₓ/Al₂O₃ 촉매의 활성평가

정지은(Ji Eun Jeong),조연정(Yeon Jeong Jo),이창용(Chang Yong Lee) 한국환경에너지공학회 2022 한국열환경공학회 학술대회지 Vol.2022 No.1

산성비, 광화학적 스모그와 같은 대기오염문제를 해결하기 위해 정부는 대기오염물질 배출규제를 강화시켰으며, 배출할당량을 지정하는 등 점진적인 감량을 유도하고 있다. 암모니아(NH3-SCR)를 사용한 선택적 촉매 환원법은 발전소, 자동차, 선박 등에서 질소산화물을 제거하는데 사용되는 가장 오래된 상업용 촉매 기술이다. 배기가스의 NOx는 대부분 NO로 존재하는데(약 95 %), NO 일부를 N아로 전환시켜 NO/NO₂ 농도비가 1 이 된다면 SCR 반웅 속도를 상당히 증가시키는 Fast-SCR 반응이 일어날 수 있다. 따라서 Fast-SCR 반응을 위해서는 NH3-SCR공정 전에 NO를 NO₂로 산화시키는 산화 반응 단계가 필요하다. 이때 배기가스에 존재하는 CO 및 미연탄화수소를 NO와 동시에 산화시켜 제거할 수 있다면 대기오염물질 배출허용 기준에 만족시킬 수 있다. 따라서 본 연구에서는 NO, CO, VOC 동시 제거를 위한 MnFeOₓ/Al₂O₃ 산화 촉매를 제조하여 특성 평가를 수행하고, 활성물질의 담지량, 가스농도, 반응온도에 따른 촉매의 산화특성을 고찰하였다.

딥러닝 기반 피사체 시선 추적을 통한 자동 주석 생성 시스템

정지은(Ji Eun Jeong),최용석(Yong Suk Choi) 한국정보과학회 2021 정보과학회 컴퓨팅의 실제 논문지 Vol.27 No.3

피사체의 시선 추적(Gaze Following)은 단일 이미지에서 피사체의 시선이 응시하는 지점을 탐지한다. 딥러닝 기반의 기존 연구는 단순히 시선의 각도를 추정하거나, 스마트폰과 같은 기기 스크린 내부의 응시점을 추정하므로 어떤 객체를 보는지에 대한 정보를 얻을 수 없다는 한계가 있다. 본 논문에서는 최초로 딥러닝 모델을 활용하여 피사체의 시선을 추적하고 ‘J가 넥타이를 본다.’와 같이 자동으로 주석을 생성하는 시스템을 제안한다. 시스템은 전처리 모듈, 시선 추적 모듈, 후처리 모듈로 구성되며, 전처리 모듈에서 인물을 인식하고 딥러닝 모델의 입력을 생성한다. 시선 추적 모듈에서는 딥러닝 모델이 피사체의 응시 지점이 표시된 히트맵(heatmap)을 생성한다. 후처리 모듈에서는 우리가 제안하는 객체 선택 알고리즘에 의해 응시 지점에 있는 객체를 인식하고 주석을 생성한다. 제안된 시스템은 리테일링 및 학술 목적의 대규모 메타데이터를 효율적으로 생성하는 데 활용될 수 있다. Gaze following is the task of detecting the point of attention in a single image at which a subject"s gaze is staring. The existing deep learning methods have a limitation in that they cannot determine which specific object is the target of the gaze angle, because these methods simply estimate the gaze angle, or estimate the gaze point within the screen of a device, such as a smart phone. In this paper, we propose a novel system that infers where a subject is looking by using a deep learning model and automatically generating annotations such as "J is looking at the tie." The proposed system consists of a pre-processing module, a gaze following module, and a post-processing module. In the pre-processing module, our system recognizes faces and generates inputs for the deep learning model. In the gaze following module, the deep neural network generates a heatmap for the point at which the subject is looking. In the post-processing module, the proposed object selection algorithm determines the object of the gaze point, and annotations are then generated. The proposed system can be used to generate large-scale metadata for retailing and academic purposes.

유기산 첨가제를 이용한 저품질 석회석 슬러리의 탈황 성능 개선

정지은 ( Ji Eun Jeong ),조인아 ( In Ah Cho ),이창용 ( Chang-yong Lee ) 한국공업화학회 2021 공업화학 Vol.32 No.2

저품질 석회석의 탈황 성능 개선을 알아보기 위해 초산, 젖산, 개미산 등 3종의 유기산 첨가제를 사용하여 기포형 반응기에서 탈황 반응을 수행하였다. 유기산이 첨가되지 않은 석회석 슬러리는 pH 5.2 이하에서 초기 탈황 효율의 저하가 일어났다. 반면, 유기산이 첨가된 석회석 슬러리는 pH 4.2~4.5에서 안정된 초기 탈황 효율을 나타내었다. 슬러리 pH 4 이하에서 유기산이 첨가된 석회석 슬러리의 탈황 성능은 유기산의 해리에 의해 생성된 음이온의 양과 연관될수 있다. 슬러리 중 유기산의 음이온 양이 많으면 슬러리 pH의 완충 기능 저하가 급격히 일어나지 않았다. 이와 같은 결과들은 유기산의 산성도 및 해리도에 기인하였다. 3종의 유기산 첨가에 따른 저품질 석회석 슬러리의 탈황 성능증가율은 초산(2.6%) < 젖산 (6.4%) < 개미산 (16.7%) 순으로 나타났다. Desulfurization reaction in a bubble type reactor was carried out by adding three organic acids such as acetic acid, lactic acid, and antic acid to investigate the enhancement of the desulfurization performance of low-grade limestone. Desulfurization of limestone slurry without organic acids initiated to degrade at pH 5.2 or less, whereas organic acid-added limestone slurry exhibited a stable efficiency in the initial desulfurization with slurry pH ranging 4.2~4.5. At slurry pH below 4, the desulfurization performance of limestone slurry with addition of organic acids may be related to the amount of anions produced by dissociation of the organic acids. When limestone slurry had a large amount of anions, a rapid decrease in buffer capacity of slurry pH did not occur. These results were due to the acidity and dissociation of organic acids. The desulfurization performance of low-grade limestone slurry increased in the order of acetic acid (2.6%) < lactic acid (6.4%) < formic acid (16.7%).

대학 진로탐색학점제 활성화 방향 모색: 운영 사례를 중심으로

정지은(Jeong Ji-Eun),홍은선(Hong Eunseon),곽미선(Kwak Misun) 한국진로교육학회 2024 진로교육연구 Vol.37 No.2

This study aimed to analyze the operation of the Career Exploration Credit System and explore ways to revitalize the Career Exploration Credit System as a model for university career education, focusing on the Career Exploration Credit System that reflects the needs of the changing times in higher education. To this end, this study developed a framework for analyzing the operation of Career Exploration Credit System, and analyzed the operation of Career Exploration Credit System in terms of purpose and strategy, implementation system, operating procedures, operational performance, and management according to the analysis framework. In addition, targeted group interviews were conducted with those in charge of the Career Exploration Credit System to understand the operation of the program at the university level. As a result of the analysis, we found that the purpose of Career Exploration Credit System can be categorized into two types: those that focus on upgrading the education system and those that focus on developing student competencies, and we found distinctive features in terms of operating procedures, operating performance, and management. In order to revitalize the Career Exploration Credit System as a university career education model, the study drew implications such as devising various operating models, linking and expanding resources within universities, establishing instructor roles and support systems, and scaling up operational performance, and made policy recommendations to implement them.

NIR-triggered Structural and Functional Recovery of Polymer Networks

Ji-Eun Jeong(정지은),이상호,정효철,정유진,박영일,김진철 한국고분자학회 2023 한국고분자학회 학술대회 연구논문 초록집 Vol.48 No.2