폐의 저악성 점액성 낭종

강경민,임용택,김철환,이섭,허용,김병열,이정호,Kang, Kyung-Min,Lim, Yong-Taek,Kim, Chul-Hwan,Lee, Seob,Hur, Yong,Kim, Byung-Ryul,Lee, Jung-Ho 대한흉부심장혈관외과학회 1998 Journal of Chest Surgery (J Chest Surg) Vol.31 No.2

폐의 저악성 점액성 낭종은 보고된 예가 매우 드물며 기관지성 낭종 및 뮤신을 분비하는 기관지폐포암 형태의 선암과 감별이 필요하다. 63 세의 여자환자로서 흉부단순촬영 사진에서 우측 폐하엽에서 종괴가 관찰되었다. 술전 경피생검상에서 기관지폐포암으로 진단되었고 우측 폐하엽 절제술 및 임파절 제거술을 시행하였다. 절제된 폐내에서 다양한 크기의 다발성 낭성 종괴들이 보였고 종괴내에는 점액으로 채워져 있었다. 현미경상에서 낭종은 키가 큰 주상구조의 점액성 상피세포들로 구성되어 있었고 한정된 일부분에서 기관지폐포암양 병소가 관찰되었으나 기관지폐포암과 비교하여 세포의 비정형성(atypism)은 부족하였다. 수술후 환자는 합병증없이 퇴원하였고 12개월 추적관찰에서 재발이나 원격전이 소견은 보이지 않았다. 폐의 저악성 점액성 낭종은 술후 예후가 상당히 좋은 것으로 보고 되고 있으며 폐에서 발생하는 다른 신생물과는 감별이 필요할 것이다. Pulmonary mucinous cystic tumor of borderline malignancy is very rare and distinguished from bronchogenic cyst or adenocarcinoma of bronchoalveolar type. We present the case of a 63-year-old woman with a right lower lobe mass, found by chest radiographs. The preoperative diagnosis was made as bronchoalveolar cancer by percutaneous needle aspiration of mass. Right lower lobectomy and lymph node dissections were performed. The lobectomy specimen contained variable sized multilocular cystic mucous masses, filled with mucus. Microscopically, the cystic masses are lined with tall columnar mucinous epithelium but some area contains focal cellular atypism and bronchoalveolar cancer like foci. This foci are lack of cellular atypism consistent with bronchoalveolar cancer cell. After lobectomy the patient has remained free from recurrence and distant metastasis for following 12 months period. Pulmonary mucinous cystic tumor of borderline malignancy appears to have a favorable prognosis and should be distinguished from other lung neoplasms.

근시 환자에서 노안교정 비구면 미세단안시 라식 수술의 장기적인 임상 결과

강경민,정보영,조희태,이준훈,김홍균,Kyoung Min Kang,Bo Young Jung,Hee Tae Cho,Jun Hun Lee,Hong Kyun Kim 대한안과학회 2013 대한안과학회지 Vol.54 No.12

Purpose: To evaluate the efficacy, safety, and satisfaction of patients who underwent LASIK for presbyopia correction in myopic patients using aspheric micro-monovision.<br /> Methods: LASIK for presbyopic correction using aspheric micro-monovision was performed in 18 patients between December 2010 and December 2011. Distance, intermediate, and near visual acuity, refractive change, and patient’s satisfaction were evaluated for at least 12 months after the surgery.<br /> Results: Among dominant eyes, 100% achieved uncorrected distance and intermediate visual acuity of 0.8 or better and 100% of the eyes achieved 0.8 or better binocularly. In the non-dominant eyes, 83% achieved uncorrected near visual acuity of J3 or better, and 94% of the eyes achieved J3 or better binocularly. Postoperatively, the mean manifest refraction spherical equivalent (MRSE) of the dominant eyes were -0.09 ± 0.35D, -0.17 ± 0.42D, and -0.17 ± 0.47D at 1, 6 and 12 months, respectively. The MRSE of the non-dominant eyes were -0.94 ± 0.53D, -1.03 ± 0.56D, and -1.02 ± 0.50D at postoperative 1, 6, and 12 months, respectively, without significant regression. After surgery, the patient’s overall satisfaction score was good (4.2 out of 5).<br /> Conclusions: The aspheric micro-monovision protocol showed good distance, intermediate, and near visual outcomes, and was a well-tolerated, stable, and effective procedure for treating patients with myopic presbyopia.<br /> J Korean Ophthalmol Soc 2013;54(12):1893-1901

Nd:YAG 레이저 후낭절개술 후 유리체탈출에 의해 발생한 동공차단 및 안압상승

강경민,김종진,이준훈,신재필,Kyoung Min Kang,Jong Jin Kim,Jun Hun Lee,Jae Pil Shin 대한안과학회 2013 대한안과학회지 Vol.54 No.5

Purpose: To report a case of pupillary block and increased intraocular pressure caused by vitreous prolapse after Nd:YAG laser posterior capsulotomy. Case summary: A 70-year-old male visited the hospital for decreasing visual acuity and ocular pain in the left eye. Two days earlier, he had undergone Nd:YAG laser posterior capsulotomy in the left eye. Best corrected visual acuity (BCVA) was 0.63 in the right eye and FC 60 cm in the left eye. Intraocular pressure (IOP) was 14 mm Hg in the right eye and 64 mm Hg in the left eye. Slit-lamp examination revealed diffuse corneal stromal edema and iris bombe with vitreous prolapse in the anterior chamber. Gonioscopy confirmed a closed angle. Pupillary block and increased intraocular pressure were diagnosed. A Nd:YAG laser iridotomy was performed. Three days after the iridotomy, BCVA was 0.2 and IOP was 11 mm Hg in the treated eye. Slit-lamp examination revealed reduced vitreous prolapse in the anterior chamber. Conclusions: This is the first report of pupillary block and increased IOP caused by vitreous prolapse after Nd:YAG laser posterior capsulotomy in Korea. Physicians should be aware that pupillary block could be caused by prolapsed vitreous after Nd:YAG laser posterior capsulotomy and Nd:YAG laser iridotomy could be performed effectively in such cases.

ZrO₂ 첨가된 0.96(K_0.5Na_0.5)NbO₃-0.04SrZrO₃ 압전세라믹스의 환원분위기 소결

강경민,조정호,남중희,고태경,전명표,Kang, Kyung-Min,Cho, Jeong-Ho,Nam, Joong-Hee,Ko, Tae-Gyung,Chun, Myoung-Pyo 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.7

The most widely used piezoelectric ceramics are lead oxide based ferroelectrics (PZT). However, the toxicity of lead oxide and its high vapor pressure during processing have led to a demand for alternative lead-free piezoelectric materials. We synthesized Lead-free piezoelectric ceramics of $0.96(K_{0.5}Na_{0.5})NbO_3-0.04SrZrO_3+x$ mol% $ZrO_2$ [KNN-SZ+$xZrO_2$; x= 0~0.10] doped with 0.1 wt% $MnO_2$ by a conventional solid state method. We investigated the piezoelectric properties and microstructures of these disk samples sintered in reduced atmosphere in order to evaluate the possibility of the multilayered piezoelectric ceramics having the base metal such as Ni as a internal electrode. All of these KNN-SZ samples sintered in 3%$H_2-97%N_2$ atmosphere at $1,140^{\circ}C$ exhibit pure perovskite structure irrespective of the content of $ZrO_2$. Meanwhile, the sintering denisty and piezoelectric properties such as $K_p$, $Q_m$ and $d_{33}$ of KNN-SZ samples as a function of $ZrO_2$ content show the maxima ($k_p$=28.07%, $Q_m$= 101.34, $d_{33}$= 156 pC/N) at x= 0.04 and it is likely that there is some morphotropic phase boundary(MPB) in this KNN-SZ+$xZrO_2$ composition system. These results indicate that the ceramic composition is a promising candidate material for applications in lead free multilayer piezoelectric ceramics.

Youtube 인기 동영상 추천을 위한 분류 시스템

강경민(Kyoungmin Kang),엄종욱(Jongwook Eom),정호진(Hojin Jung),박상원(Sangwon Park),이진석(Jinseok Lee),강희민(Heemin Kang),강태원(Taewon Kang) 한국정보기술학회 2020 Proceedings of KIIT Conference Vol.2020 No.10

해양생태보존을 위한 마을어장 모델에 관한 연구: 제주특별자치도의 어촌계 사례를 중심으로

강경민 ( Kyeong Min Kang ) 제주대학교 탐라문화연구소 2015 탐라문화 Vol.0 No.49

본 연구는 제주특별자치도의 어촌계 사례를 중심으로 마을어장의 관리에 대한 연구를 통하여 해양생태보존을 위한 마을어장모델에 대한 제시할 수 있는 원리를 발굴하는 데 있다. 연구방법은 사례에 대한 과정의 이해를 바탕으로 한 논의의 전개가 필요하고, 이용주체, 이용체계, 이용규칙, 집합적 장치 등 상호 다양한 관계를 문헌과 면담 및 토론 등을 통하여 밝혀낼 수 있기 때문에 질적 연구방법을 통하여 진행하는 것이 보다 적절하다고 판단하였다. 연구를 수행하면서 6개의 어촌계에 대하여 마을어장 관리규약을 상호 비교하였고, 어촌계를 방문하여 어촌계장과 면담을 실시하였다. 규약과 면담을 통하여 얻은 결론은 해양생태보존을 위한 마을어장모델은 다음의 원리가 있어야 함을 발견하였다. 첫째, 공존의 원리이다. 해양생태보존을 위한 마을어장모델은 이용자와 상호 공존할 때 가능하다. 둘째, 신뢰의 원리이다. 신뢰는 지속가능성의 원천이다. 셋째, 순응의 원리이다. 마을어장 관리는 규범과 규칙에 순응을 전제로 한다. 넷째, 나눔의 원리이다. 해양생태보존을 위해서는 서로 나누어야 한다. The purpose of this study is to find some principles that can be applied to the model of village Fisheries for marine and ecology preservation through case study of management of village fisheries, primarily focused on fishing village cooperatives in Jeju Special Self-Governing Province. I used methodology combing of qualitative research methods. Through this study, I tried to compare regulations on management of village fisheries between village to village cases among six selected fishing village cooperatives. I conducted intensive interviews with the chief of fishing village cooperatives about some achievements and effectiveness of their management at their organizations. The findings of this research of regulations is resulted as quires following principles: First, When ecology preservation models bring benefits to both village fisheries and users, we can become can say it is effective. Second, credibility is the source of sustainability. Third, as for good management of village fisheries, it requires for them to respect or keep basic regulations and rules for handing those activities. Fourth, users must share spirits of keeping their community alive in order to achieve marine and ecology preservation in their communities.

발포 알루미늄의 복합 구조에 따른 물성 연구

강경민(Min-Kyoung Kang),정우성(Woo-Sung Jung),이덕희(Duck-hee Lee),한경표(Kyung-Pyo Han) 한국철도학회 2012 한국철도학회 학술발표대회논문집 Vol.2012 No.5

본 논문에서는 철도차량 바닥구조의 경량화를 위하여 발포 알루미늄의 활용성을 검토해 보았다. 발포 알루미늄은 다공성 구조로, 기공률에 의해 밀도를 조절할 수 있어 경량효과를 낼 수 있고 에너지 흡수에 효과적이며 불연성 금속재료이다. 바닥구조에 활용하는 데 있어 필요한 물성을 검토해 보기 위하여, 발포알루미늄 심재와 발포알루미늄 심재에 강화 알루미늄 판을 접착시켜 표면층 구조를 변경한 발포알루미늄 샌드위치 패널을 대상으로 각각 열전도율, 충격강도, 압축강도, 열팽창 계수 시험을 진행하였다. In this paper, we considered application of the aluminum foam lightweighting the railcar floor structure. As the structure of the aluminum foam is porous, it can control density by porosity. Its porous structure make lightweighting the railcar and effective energy absorption. Also, aluminum foam is non-combustible metal material. For considering more necessary properties of the aluminum foam to apply floor structure of the railcar, 4 experiments were performed ; thermal conductivity, impact strength, compressive strength, coefficient of thermal expansion.

크립 그론 소음 특성에 대한 실험적 연구

강경민(Kyung Min Kang),전현철(Hyun Cheol Jeon),조민형(Min Hyung Cho),강연준(Yeon June Kang) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.4

연구논문 : 학령 전 아동의 라이프스타일과 부모의 체중인지도가 아동의 과체중위험에 미치는 영향

강경민 ( Kyung Min Kang ),윤군애 ( Gun Ae Yoon ) 한국식생활문화학회 2010 韓國食生活文化學會誌 Vol.25 No.2

We conducted this study to determine the factors associated with childhood obesity. The subjects were 170 preschool children in Busan. Data were collected by using questionnaires which asked for information about socioeconomic status, parental perception of their child`s weight status and dietary/physical activity behavior. BMI was calculated for each child and their classification was determined, according to their age and sex, as follows: "overweight" at or above the 85th percentile, "normal" for the 15th-85th percentile, and with a BMI below the 15th percentile the children were deemed as underweight. Classification according to BMI percentile showed that 23.5% (18.25±1.33 kg/m2) of the children were overweight, 62.9% (15.51±0.76 kg/m2) normal, and 13.5% (13.23±2.86 kg/m2) were underweight. Socioeconomic status, as represented by the parents` level of education, the occupation of the father and the household income, did not affect the results. However, mothers working outside the household was a factor that was more likely to affect the weight status (p<0.05). Among mothers whose children were overweight, 30% underestimated their children`s weight status (believing them to be of normal weight when they were overweight), and 25% failed to recognize the necessity of weight control for their overweight children. While sedentary activity and total daily activity levels were not related to BMI, the level of physically active leisure activity was inversely correlated with BMI (p<0.05). Although there were no differences in total energy intake, dietary behavior was significantly related to weight status. Overweight children had poor eating tendancies: they eat faster (in less than 15 minutes), overeat, and eat late at night. Based on our findings where hereby recommended the following interventions to help limit weight problems in Korean pre-schoolers: early promotion of active leisure behavior and healthy eating habits, along with attempting to correct parental misperception of healthy weight status for children.

자율주행 트랙터 새머리 선회 추종 성능향상을 위한 곡률 감지 가변 속도제어 기초연구

강경민 ( Kyeong-min Kang ),전찬우 ( Chan-woo Jeon ),윤창호 ( Changho Yun ),박승진 ( Seung-jin Park ),황예빈 ( Ye Been Hwang ),최동석 ( Choi Dong-seok ),김학진 ( Hak-jin Kim ) 한국농업기계학회 2021 한국농업기계학회 학술발표논문집 Vol.26 No.2

미국, 유럽 등의 대규모 단위의 농경지에서 작업을 하는 국가와 달리 국내의 소규모 농경지는 농작업시 선회빈도가 잦은 특징을 나타낸다. 그러므로 자율주행 농기계의 작업 효율과 안정성을 높이기 위해서는 선회시 환경 변화에 대응하는 가변적 속도제어가 필요하다. 본 연구에서는 주행 경로의 곡률을 기반으로한 가변 속도 제어를 통해 자율주행 농기계의 주행성능을 향상시켜 작업효율과 안정성을 높이기 위한 기초 연구를 수행하였다. GNSS를 통해 생성된 경로의 곡률과 횡방향 가속도를 측정하고 경로 추종 정확도와 추종 속도 향상의 장점을 가진 s-curve 방식의 속도 프로파일을 생성하여 속도를 계산하였다. 실험은 전륜 조향 드라이브와 차동 기어가 있는 모터 동력을 이용한 4륜 구동형 자율주행 로봇 플랫폼 언맨드솔루션사의 ERP42를 이용하여 C형 선회기반 작업경로에서 진행되었다. 그리고 고정된 속도값을 입력하는 기존의 자율주행 방식과 개발된 알고리즘을 통해 가변 속도 제어 방식의 실험 결과에 대한 주행 중 측면 변위 오차와 작업시간을 비교하여 성능 평가하였다. 실험 결과는 개발된 알고리즘이 주어진 경로에서 측정된 곡률을 통해 속도 프로파일을 생성하여 속도제어를 함으로써 선회 주행시 기존의 자율주행 방식에 비해 주행 중 측면 변위 오차와 작업시간이 감소함을 확인했다.