시판 견사/셀룰로오스계 원사 교직물의 태 평가 및 홍화 염색물의 색상 분석에 대한 연구

김아람(Kim Ah-Ram),김종준(Kim Jong-Jun) 한복문화학회 2009 韓服文化 Vol.12 No.3

In Korean costumes, silk, ramie, and cotton fibers have long been used. Since the physical properties of the silk and cellulosic yarns are different, the resulting hand of the union fabric becomes unique in stiffness, springiness, smoothness, etc. These unique characteristics are mainly due to the anisotropic nature of the specimens. The hand properties of the union fabrics for the usage of summer clothing were evaluated using a fabric objective measurement system, KES(Kawabata Evaluation System). In this study, the dyeing properties of union fabrics of silk and cellulosic yarns were investigated. Even without mordants, dyeing of cellulosic fibers or silk fibers using safflower as a natural dyeing material is possible. Appropriate extraction conditions and dyeing conditions were investigated for the dyeing of the union fabric specimens, comprising silk and other fiber such as cotton, linen, ramie, and 'Hanji'. pH control for the extraction procedure is extremely important. In this study pH10.5 was maintained during the extraction procedure, in order to obtain red color, along with the dye bath pH control. Due to the different absorption characteristics of the silk and cellulosic yarns toward the safflower's dyestuff components, different color values were obtained under the observation direction of the union fabric specimens. Color characteristics of the dyed union fabric specimens were analyzed using colorimeters. Image analysis system/software under specific illumination condition was also adopted for the analysis. The union fabric specimens dyed using safflower exhibited compounded nature in terms of the hand of fabric and the color. Since the warp and filling yarns are of different fiber materials, when the observing directions are changed, the color of the dyed union fabric changed accordingly. This would add some unexpected beauty and sensibility - under wearing conditions - attributable to the directional color change, dependent on the observation position, of the dyed fabrics.

RuO₂/Ti, PtO₂/Ti, IrO₂/Ti 및 흑연전극을 이용한 염료폐수의 전기화학적 처리

김아람(A Ram Kim),박현정(Hyun Jung Park),원용선(Yong Sun Won),이태윤(Tae Yoon Lee),이제근(Jae Keun Lee),임준혁(Jun Heok Lim) 한국청정기술학회 2016 청정기술 Vol.22 No.1

섬유산업은 염색폐수의 농도가 높고 방출량이 많아 고도의 공해산업으로 알려져 있다. 염색폐수에는 색도물질 뿐만 아니라 다량의 유기화합물과 불용성 물질이 섞여 있다. 합성염료 중 아조(azo) 염료는 특히 오염물질의 배출이 많은 것으로 알려져 있다. 전기화학적 폐수처리방법은 전극의 산화 · 환원반응에 의해 색도와 유기물 등을 처리하는 방법으로 다른 폐수처리방법들에 비해 반응기가 작고 경제적이고 간단하며 오염물제거속도가 빠르다. 본 연구에서는 diazo 화합물인 CI Direct Blue15 염색 폐수의 전기화학적 분해특성을 연구하였다. 실험은 전극재질과 조업조건을 달리하여 그에 따른 분해효율을 알아보고자 하였으며, 탈색 효율을 향상시킬 수 있는 최적전극 재질과 조업조건을 알아보고자 하였다. 조업조건으로는 전해질 농도, 전류밀도, 반응 온도, 초기 pH의 영향을 검토하였다. 음극은 stainless steel 전극을 사용하였고, 양극은 graphite와 RuO₂/Ti, PtO₂/Ti, IrO₂/Ti를 사용하여 조업조건에 따른 각 전극의 염색폐수 분해성능 실험을 수행하였다. 그 결과 전해질의 농도와 전류밀도 증가에 따라 전기분해 효율은 증가하였다. 양극 재질에 따른 전기분해 효율은 산성 전해질 조건에서 RuO₂/Ti > PtO₂/Ti > IrO₂/Ti > graphite 순이었고 중성과 염기성에서는 RuO₂/Ti > IrO₂/Ti > PtO₂/Ti > graphite의 순으로 나타났다. 따라서 염색 폐수의 전기분해 처리에는 RuO₂/Ti와 IrO₂/Ti가 가장 효율적인 양극재질이었다. Textile industry is considered as one of the most polluting sectors in terms of effluent composition and volume of discharge. It is well known that the effluents from textile dying industry contain not only chromatic substances but also large amounts of organic compounds and insolubles. The azo dyes generate huge amount of pollutions among many types of pigments. In general, the electrochemical treatments, separating colors and organic materials by oxidation and reduction on electrode surfaces, are regarded as simpler and faster processes for removal of pollutants compared to other wastewater treatments. In this paper the electrochemical degradation characteristics of dye wastewater containing CI Direct Blue 15 were analyzed. The experiments were performed with various anode materials, such as RuO₂/Ti, PtO₂/Ti, IrO₂/Ti and graphite, with stainless steel for cathode. The optimal anode material was located by changing operating conditions like electrolyte concentration, current density, reaction temperature and initial pH. The degradation efficiency of dye wastewater increased in proportion to the electrolyte concentration and the current density for all anode materials, while the temperature effect was dependent on the kind. The performance orders of anode materials were RuO₂/Ti > PtO₂/Ti > IrO₂/Ti > graphite in acid condition and RuO₂/Ti > IrO₂/Ti > PtO₂/Ti > graphite in neutral and basic conditions. As a result, RuO₂/Ti demonstrated the best performance as an anode material for the electrochemical treatment of dye wastewater.

국제신체활동량 설문지(IPAQ)를 이용한 대학생의 신체활동량과 대사증후군위험요소에 미치는 영향

김아람(Kim, A-Ram),심유진(Shim, Yoo-Jin),최승욱(Choi, Seung-Wook) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.4

The present study investigated the influences on college students’ physical activity level and risk factors for the metabolic syndrome. The subjects of this study were divided into the low, moderate, and high activity group with seven subjects in each, and assessed with International Physical Activity Questionnaires (IPAQ) for measurement of physical activity level and calculation of physical activity. Participating in subjects underwent body measurements, body composition, and blood test. Analysis of risk factors for the metabolic syndrome included the blood pressure, total cholesterol, low density lipoprotein cholesterol (LDL-C), high density lipoprotein cholesterol (HDL-C), triglycerides (TG), fasting blood sugar (FBS), and waist circumference (WC). According to the results of this study, HDL-C and TG showed a significant difference between the high and the low activity groups based on the physical activity level; however, SBP, DBP, FBS, and WC showed no significant differences. These suggest that prevention and management of metabolic syndrome for college students are urgently needed, while a high intensity activity for college students to prevent chronic disease in their middle and older ages have been demonstrated to be effective in reducing TG and HDL-C which are risk factors for the metabolic syndrome and will be critical in lifestyle to promote public health.

부하를 이용한 정적 스트레칭이 넙다리뒤근육의 유연성에 미치는 영향

김아람(Kim, Ah-Ram),권정현(Kwon, Jung-Hyun),이호성(Lee, Ho-Seong) 한국체육과학회 2015 한국체육과학회지 Vol.24 No.3

The purpose of this study were to investigate the effect of static stretching loading on hamstring flexibility in healthy individuals. Twelve healthy individuals were randomly assigned to static stretching loading group (SLG, n=6) and static stretching group (SSG, n=6). Static stretching was performed dead lift with (1RM 10%; SLG) and without (SSG) load intensity (30 seconds x 4 sets, rest for 15 seconds between each set) for 10 days. Passive knee extension test (PKE), straight leg raising test (SLR) and toe touching test (TTT) were measured before, and every day (post 1 d ~ 10 d) for ten days. PKE was significantly increased from post 4 d to 10 d (p〈.05) in SLG and post 8 d to 10 d (p〈.05) in SSG compared with before stretching. SLR was significantly increased from post 1 d to 10 d (p〈.05) in SLG and post 6 d to 10 d (p〈.05) in SSG compared with before stretching. TTT was significantly increased from post 1 d to 10 d (p〈.05) in SLG and post 6 d to 10 d (p〈.05) in SSG compared with before stretching. These results confirmed that static stretching using loading improves hamstring flexibility.

GARCH-LSTM 결합모형을 이용한 펀드 위험등급 예측

김아람(Kim A Ram),박민호(Park Min ho) 한국통신학회 2023 한국통신학회 학술대회논문집 Vol.2023 No.2

소아 분화 갑상선암의 15년 이상의 추적 관찰

김아람,성치원,박영삼,김철승,김갑태,A Ram Kim,M.D.,Chi Won Sung,M.D.,Young Sam Park,M.D.,Cheol Seung Kim,M.D.,Ph.D. and Kab Tae Kim,M.D.,Ph.D. 대한갑상선-내분비외과학회 2010 The Koreran journal of Endocrine Surgery Vol.10 No.1

Purpose: Thyroid cancer is rare in childhood. Although thyroid cancer is biologically more aggressive in children because of the high incidence of lymph node metastasis and distant metastasis when compared with that of adults, the prognosis is better. This study investigated the prognosis of pediatric differentiated thyroid cancer with 15 years or greater follow-up and we consider the proper treatment of pediatric differentiated thyroid cancer. Methods: From January, 1979 to December, 1994 during 16 years, 17 patients younger than 17 years old and who underwent thyroid surgery for well differentiated thyroid cancer at the Department of Surgery at Presbyterian Medical Center were retrospectively reviewed by the medical records and they were interviewed by telephone. Results: Total thyroidectomy was performed in 4 patients (23.5%), subtotal thyroidectomy was performed in 10 patients (58.8%) and lobectomy was performed in 3 patients (17.7%). The mean follow-up period was 23.5 years (range: 15∼28.2 years) and recurrence was found in 7 cases (41.3%). Five cases (29.5%) showed locoregional recurrence and 2 cases (11.8%) showed distant metastasis. Postoperative radioiodine (<SUP>131</SUP>I) therapy was done in 6 cases (35%) and 6 cases (35%) underwent radioiodine therapy as a therapeutic modality for metastasis. Conclusion: The pediatric well differentiated thyroid cancer in this study showed high rates of lymph node metastasis at the time of diagnosis and a high recurrence rate, but the prognosis was good (100% overall survival rate during the follow-up period). Therefore, total thyroidectomy, radical lymph node dissection and postoperative radioiodine therapy are considered the initial patient management. This aggressive therapeutic management can decrease of the recurrence rate and increase the therapeutic effect. A radioiodine scan and thyroglobulin can used for follow-up. (Korean J Endocrine Surg 2010;10:34-38)

아동 및 청소년의 라이프스타일 평가도구에 관한 조사: 체계적 고찰

김아람(Ah-Ram Kim),박지혁(Ji-Hyuk Park) 대한신경계작업치료학회 2022 재활치료과학 Vol.11 No.2

목적 : 아동 및 청소년의 다면적인 라이프스타일을 평가하는 표준화된 평가도구 개발을 위해 라이프스타일 평가도구와 라이프스타일 구성요소별 평가도구들을 체계적으로 분석하고자 한다. 연구방법 : 기간은 2001년부터 2020년까지였으며, 검색엔진은 CINANL, NDSL, PubMed, RISS를 사용하였다. 검색어는 ‘lifestyle assessment’ OR ‘lifestyle profile’ OR ‘lifestyle test’, ‘physical activity assessment’ OR ‘physical activity participation profile’, ‘nutrition assessment’ OR ‘nutrition profile’, ‘activity participation assessment’ OR ‘activity participation profile’을 사용하였다. 결과 : 5,883편의 연구에서 중복제거 후 제목, 초록, 전문을 검토한 결과, 총 24개의 평가도구가 선정되었다. 세부 결과로는 라이프스타일 평가도구 5개, 신체활동 평가도구 7개, 식습관 평가도구 9개, 활동참여 평가도구 3개가 도출되었다. 결론 : 아동 및 청소년의 라이프스타일 평가도구에 대하여 각 항목별 평가도구의 평가항목, 측정방법, 평가대상연령을 분석하였다. 향후 아동 및 청소년을 위한 표준화된 다면적인 라이프스타일 평가도구의 개발에 기초자료로 활용되기를 기대한다.

Chlorella saccharophila 배양을 위한 목질계 및 해조류 바이오매스 가수분해물의 이용

김아람 ( A-ram Kim ),김효선 ( Hyo Seon Kim ),박미라 ( Mi-ra Park ),김성구 ( Sung-koo Kim ),정귀택 ( Gwi-taek Jeong ) 한국미생물생명공학회(구 한국산업미생물학회) 2016 한국미생물·생명공학회지 Vol.44 No.4

본 연구에서는 3종류의 목질계 바이오매스와 4종류의 해조류 바이오매스를 전처리와 효소가수분해 과정을 통하여 얻은 환원당을 이용하여 C. saccharophila를 배양하였다. 얻어진 가수분해물을 활성탄 처리 유무에 따라 배양한 결과, 목질계 바이오매스와 해조류 바이오매스 가수분해물을 활성탄 처리하지 않은 경우에는 C. saccharophila의 성장이 저해 되었다. 목질계 바이오매스인 유채대와 보리대 그리고 볏짚과 해조류 바이오매스인 미역, 다시마, 파래 그리고 꼬시래기 가수분해물의 경우 활성탄 등으로 처리한 경우에서 목질계 바이오매스와 해조류 바이오매스 가수분해물에서 C. saccharophila의 성장이 관찰되었다. 미세조류의 생산성과 oil 함량, chlorophyll 등을 고려하였을 때 목질계 바이오매스와 해조류 바이오매스는 C. saccharophila의 product 생산을 위한 배양에 이점을 가지며, 특히 chlorophyll 생산에 보다 유용하리라 판단된다. In this study, we investigated the possibility of using hydrolysates of lignocellulosics (rapeseed straw, barley straw, rice straw) and marine macro-algae (Undaria pinnatifida, Laminaria japonica, Enteromorpha intestinalis, and Gracilaria verrucosa) to cultivate Chlorella saccharophila. The growth of C. saccharophila was inhibited by 7 hydrolysates without active carbon treatment. In contrast, hydrolysates treated with active carbon increased the cell growth and product (oil and chlorophyll) formation by C. saccharophila. The oil contents of C. saccharophila treated with each hydrolysate were 41.26 ± 0.69% (glucose), 22.06 ± 1.21% (rapeseed straw), 28.65 ± 1.08% (barley straw), 31.15 ± 0.76% (rice straw), 31.50 ± 2.12% (U. pinnatifida), 31.49 ± 4.53% (L. japonica), 29.63 ± 3.93% (E. intestinalis), and 26.15 ± 1.99% (G. verrucosa), respectively. Lignocellulosics and marine macro-algae may be useful resources for improving the mass cultivation of C. saccharophila.

HMM을 이용한 자연스러운 손동작 인식

김아람(A-Ram Kim),이상용(Sang-Yong Rhee) 한국지능시스템학회 2012 한국지능시스템학회논문지 Vol.22 No.5

본 논문에서는 모바일 로봇이 자연스러운 손동작을 은닉 마르코프 모델(HMM: hidden markov model)을 이용하여 인식해 원하는 명령을 수행하는 방법을 제안한다. 기존의 손동작 기반 로봇 제어 방식은 정해진 몇 종류의 제스처를 사용했었고, 따라서 지시동작이 자연스럽지 않았다. 또한 정해진 제스처를 미리 공부해야하여 불편했었다. 이러한 문제를 해결하기 위해 손동작을 인식하는 방법에 대한 많은 연구가 활발히 진행되고 있다. 본 논문에서는 3차원 카메라를 사용해 색상 데이터와 깊이 데이터를 얻어서, 사람의 손을 검색하고 그 동작을 인식한다. 여기서 동작을 인식하는 방법으로 HMM을 사용하였으며, 인식된 결과를 로봇에게 전달하여 원하는 방향으로 이동시킨다. In this paper, we propose a method that gives motion command to a mobile robot to recognize human being"s hand gesture. Former way of the robot-controlling system with the movement of hand used several kinds of pre-arranged gesture, therefore the ordering motion was unnatural. Also it forced people to study the pre-arranged gesture, making it more inconvenient. To solve this problem, there are many researches going on trying to figure out another way to make the machine to recognize the movement of the hand. In this paper, we used third-dimensional camera to obtain the color and depth data, which can be used to search the human hand and recognize its movement based on it. We used HMM method to make the proposed system to perceive the movement, then the observed data transfers to the robot making it to move at the direction where we want it to be.

교환학생 프로그램을 통한 한국 대학생의 미국 대학 수업참여 경험의 의미

김아람(Kim A ram) 학습자중심교과교육학회 2015 학습자중심교과교육연구 Vol.15 No.10

본 연구는 교환학생 프로그램을 통해 미국에 다녀온 두 명의 연구 참여자들의 이 야기를 중심으로, 그들이 경험한 대학 수업과 그를 통한 변화의 과정에 주목하였다. 이를 위해 질적 연구방법의 하나인 내러티브 탐구 방법을 활용하여, 연구 참여자들 이 교환학생을 떠나기 전 경험했던 대학 수업, 미국 교환학생 시절에 참여하였던 수 업, 그리고 다시 한국 대학으로 돌아온 이후의 수업경험에 대해 이야기하고(telling) 다시 이야기하였다(retelling). 연구결과에 따르면, 연구 참여자들에게 있어 교환학생 프로그램을 통한 미국 대학에서의 수업참여 경험은 ‘굴절의 경험’이었다. 연구 참여 자들은 교환학생을 떠나기 전까지 한국에서의 대학 수업만을 경험하였다. 하지만 미 국 대학이라는 새로운 환경에 놓이게 되면서, 그들은 기존의 경험과 일직선상에 있 는 것이 아닌 굴절된 경험을 하게 된다. 하지만 연구 참여자들의 굴절 방향은 서로 다르게 나타났는데, 이는 그들 각자가 체험한 한국과 미국 대학의 환경과 수업경험 이 달랐기 때문이다. 연구 참여자들은 교환학생 경험을 통해 갖게 된 제3의 관점으 로 다시 한국에서의 대학수업에 참여하게 되는데, 이러한 과정 속에서 그들이 대학 수업을 바라보는 관점과 태도에 변화가 있음을 확인할 수 있었다. This study focuses on investigating the meaning of the U.S. college class participation through an international student exchange program for Korean students. To this purpose, this study utilized narrative inquiry, one of the qualitative research methods, by engaging in “telling” and “retelling” participants’ learning experiences in Korea and the U.S. university. In this study, significant characteristics are found from the participant’s experiences as follows. Participants’ learning experiences in the U.S. university showed various kinds of ‘refraction’ as they attended different types of the colleges with different learning experiences. Also, they demonstrated different perspectives and attitudes towards Korean university classes after return from study abroad program in the US universities. Given these findings, I argue that not only students’ needs and their English language proficiency should be considered in the student exchange program, but also information on respective colleges and their academic levels should be provided to students who pursue studying abroad through the student exchange program. Furthermore, the approaches that Korean students have developed from their learning experiences in the US universities should be more acknowledged in universities in Korea.