식초기반 샐러드 드레싱용 다시마 식초 제조 및 이화학적 특성

한아름,서정희,Han, Areum,Surh, Jeonghee 한국식품조리과학회 2017 한국식품조리과학회지 Vol.33 No.3

Purpose: This study aimed to prepare sea tangle vinegar and test its applicability as a vinegar-based functional salad dressing in terms of physicochemical properties. Methods: Sea tangle vinegar was prepared by mixing sea tangle with sugar and vinegar and fermenting the mixture at room temperature for 3 months. The resulting sea tangle vinegar was examined for its physicochemical properties and antioxidant activity with brewed vinegar and persimmon vinegar as controls. Results: The sea tangle vinegar showed significantly higher viscosity than control vinegars, and shear thinning behavior that is typical for salad dressing containing polymers. In addition, storage modulus (G′) of sea tangle vinegar was relatively high in dynamic viscosity measurement while that of control vinegars remained negligible. Together with the high soluble solids content of sea tangle vinegar, rheological behavior indicates that sea tangle vinegar had soluble polysaccharides extracted from sea tangle, consequently leading to an increase in viscosity. Titratable acidity (TA) and pH were 2.52% and 3.58, respectively, which satisfies the TA and pH requirements for microbiological safety of a salad dressing. Absorbance at 285 nm and Folin Ciocalteu's reagent method revealed that sea tangle vinegar contained antioxidative phenolic compounds. Conclusion: This study demonstrates that sea tangle vinegar could be potentially developed as a vinegar-based functional salad dressing when combined with sensory evaluation in the future.

이산화탄소 지중저장 모델링: 저투수 이질협재층이 이산화탄소 거동에 미치는 영향

한아름,김태희,권이균,구민호,Han, Ahreum,Kim, Taehee,Kwon, Yikyun,Koo, Min-Ho 한국지하수토양환경학회 2017 지하수토양환경 Vol.22 No.3

TOUGH2 was used to simulate the migration of $CO_2$ injected into a sandy aquifer. A series of numerical simulations was performed to investigate the effects of a low-permeability layer (LPL) embedded in the aquifer on the injection rate and the pressure distribution of $CO_2$. The results show that the size and location of the LPL greatly affected the spread of $CO_2$. The pressure difference between two points in the aquifer, one each below and above the LPL, increased as the size of the LPL increased, showing a critical value at 200 m, above which the size effect was diminished. The location of the LPL with respect to the injection well also affected the migration of $CO_2$. When the injection well was at the center of the LPL, the injection rate of $CO_2$ decreased by 5.0% compared to the case with no LPL. However, when the injection well was at the edge of the LPL, the injection rate was decreased by only 1.6%. The vertical distance between the injection point and the LPL also affected the injection rate. The closer the LPL was to the injection point, the lower the injection rate was, by up to 8.3%. Conclusively, in planning geologic storage of $CO_2$, the optimal location of the injection well should be determined considering the distribution of the LPL in the aquifer.

천연 연육후보제로서 강원도 토종다래의 항산화 활성 및 연육작용

한아름,이재철,서정희,Han, Areum,Lee, Jae-Cheol,Surh, Jeonghee 한국식품조리과학회 2018 한국식품조리과학회지 Vol.34 No.3

Purpose: This study examined the antioxidant activities and meat-tenderizing effects of hardy kiwi (Actinidia arguta) cultivated in Gangwon for the development of a value-added natural tenderizer. Methods: Hardy kiwi was analyzed for its physicochemical properties and antioxidant activities with kiwifruit as a control. Its freeze-dried powder was applied to marinate meat. The cooked meat was then examined for its texture properties. For comparison, meats treated with kiwifruit flesh or skin were tested separately along with a non-treated control. Results: The total reducing capacity and DPPH radical scavenging activity of hardy kiwi were significantly higher than those of kiwifruit flesh and comparable to those of kiwifruit skin. In addition, hardy kiwi showed characteristic patterns of both rapid kinetic behavior and slow kinetic behavior when scavenging DPPH radicals, presumably due to the use of the flesh and skin of hardy kiwi. The compression strain vs. stress curve obtained from texture profile analysis showed that hardy kiwi tenderized the meat effectively, which was comparable to the effects of kiwifruit flesh. On the other hand, meat treated with kiwifruit skin became stiff, which could be attributed to the abundance of dietary fiber in the kiwifruit skin. Conclusion: This study showed that hardy kiwi has potential use as a natural meat-tenderizer that is as effective as kiwifruit, with significantly higher antioxidant activities than the edible portion of kiwifruit.

경기인천 연안에서 분리된 장염비브리오균의 항생제 내성 및 플라스미드 보유 현황

한아름,윤영준,김정완,Han, A-Rheum,Yoon, Young-June,Kim, Jung-Wan 한국미생물학회 2012 미생물학회지 Vol.48 No.1

장염비브리오는 우리나라에서 하절기에 발생하는 식중독의 주요 원인균으로 주로 해수 및 어패류를 통해 인체에 감염된다. 최근 지구 온난화로 해수의 온도가 상승하면서 해양환경 중 세균들의 분포도가 증가하고 또 다양한 항생제에 대한 내성을 보이는 병원균들이 확산되고 있어 국민보건 및 수산양식 등의 분야에 큰 문제로 대두되고 있다. 이에 본 연구에서는 경기, 인천지역 7곳에서 해수 및 어패류 시료를 채취하여 장염비브리오균의 분포도를 모니터링하고 이들의 항생제 내성 양상을 분석하였다. 총 966건의 시료를 $CHROMagar^{TM}$ 및 TCBS 평판배지와 multiplex PCR기법으로 동정했을 때 전체 해수 시료의 61.9%, 어패류 시료의 41.8% 등 총 47.7%의 시료에서 장염비브리오균이 검출되었다. 이들 분리균주들의 항생제 내성을 13종의 항생제에 대해 분석한 결과 97.3%와 87.3%가 각각 vancomycin과 ampicillin에 대해 내성을 보였고 cephalothin (48.8%)과 rifampin (46.1%)에 대한 내성비율도 기타 다른 항생제들에 비해 상대적으로 높은 것으로 나타났다. 분리균주들의 항생제 감수성은 chloramphenicol (91.7%)과 trimethoprim-sulfamethoxazole (91.8%)에 대해 가장 높았고, gentamycin (82.3%), tobramycin (74.8%), nalidixic acid (71.6%), tetracyclin (69.4%), cefotaxime (63.0%) 등의 순서로 감수성 비율이 높았다. 분리균주들의 약 69%가 vancomycin과 ampicillin을 포함하여 3개 이상의 항생제에 대해 다중내성을 보였고 특히 11개 항생제에 대해 내성을 보이는 균주도 2개 검색되었다. 항생제 내성 장염비브리오 분리균주들의 플라스미드 프로파일을 분석한 결과 55.1%가 플라스미드를 보유하고 있었으며, 이들은 총 24가지 유형으로 분류되었으나 플라스미드 프로파일과 항생제 내성 간의 뚜렷한 상관관계는 관찰되지 않았다. Vibrio parahaemolyticus is one of the major agents responsible for food poisoning during summer in Korea, which is transmitted via seawater or seafoods. Recently, distribution of the bacteria in the marine environment has been increased due to global warming. Great concern also has been raised regarding public hygiene as well as marine culture by the emergence of pathogens with antibiotic resistance. Therefore, distribution of V. parahaemolyticus and antibiotic resistance of the isolates were monitored in 7 coastal areas of Kyonggi Province and Incheon by sampling seawater, fishes and clams monthly. V. parahaemolyticus was detected from 47.7% of 966 samples (seawater 61.9%, seafoods 41.8%) analyzed using $CHROMagar^{TM}$ and TCBS agar plates as well as multiplex PCR. Among 13 antibiotics tested, resistance to vancomycin and ampicillin was observed in 97.3% and 87.3% of the isolates, respectively, and the ratios of them resistant to cephalothin (48.8%) and rifampin (46.1%) were also high. The isolates were most highly sensitive to chloramphenicol (91.7%) and trimethoprim-sulfamethoxazole (91.8%). The ratio of sensitivity for other antibiotics was also high in the descending order of gentamycin (82.3%), tobramycin (74.8%), nalidixic acid (71.6%), tetracyclin (69.4%), cefotaxime (63.0%). About 69% of the isolates showed multiple drug resistance toward 3 antibiotics including vancomycin and ampicillin. Two of them exhibited resistance for 11 antibiotics used in this study. Plasmid profile analysis of the isolates with antibiotic resistance revealed that 55.1% of them retained plasmids of 24 different types. However, no clear inter-relationship between the resistance and the plasmid profile has been observed.

수정-IPA를 통한 푸드카빙교육 효용성의 품질속성 분류에 관한 연구

이성주(Lee, Sung-Ju),임현철(Lim, Hyun-Cheo),김상미(Kim, Sang-Mi) 한국외식경영학회 2022 외식경영연구 Vol.25 No.2

본 연구는 푸드카빙 교육을 받은 수강생들이 지각하는 푸드카빙 효용성은 어떠한지 살펴보고, 어떠한 효용성들이 있고, 효용성의 품질 속성은 어떠한지 살펴보고자 하였다. 이러한 연구목적을 규명하기 위하여 푸드카빙 교육을 받은 경험이 있는 수강생을 모집단으로 설정하였고, 설문조사는 2020년 7월 20일부터 8월 20일까지 한 달간 진행되었다. 설문지는 총 500부를 배부하였고, 435부가 회수되었고, 불성실한 설문지 38부를 제외하고 397부가 최종 분석에 사용되었다. 분석결과, 중요 실행 요소로는 푸드카빙 교육은 지루하지 않고, 남녀노소 할 수 있고, 잡생각이 사라지고, 자존감이 높아지고, 자신의 가치가 높아지고, 마음이 편해지고, 우울함이 사라지는 등의 수업 자체에서 오는 만족감의 속성들이 포함되었다. 매력적 요소에는 푸드카빙 기술이 수익으로 연결되고, 강좌를 개설하고, 적은 금액으로 공방을 오픈하는 등의 수익 측면과 관련된 항목들이 포함되었다. 아울러, 기본적 요소에는 집중할 수 있고, 기분이 좋아지고, 자격증을 취득하고, 전문가가 될 수 있다는 측면의 항목들이 포함되었다. 이는 대체로 푸드카빙을 처음 배우는 수강생들이 기본적으로 가지는 목적들이 포함되었다. This study aims to examine the food carving utility perceived by students who received food carving education, the types of the utility, and its quality attributes. To investigate this research purpose, students who had received food carving education were set as a population, and the survey was conducted for one month from July 20 through August 20, 2020. 500 copies of the questionnaire were distributed in total, and 435 copies were collected. 397 copies were used in the final analysis, excluding 38 unreliable copies. As a result of the analysis, important execution factors included the attributes of satisfaction with the class itself, e.g., Food carving education was not boring; it could be done by men and women of all ages; it made cockeyed ideas disappear; it promoted their self-esteem; it enhanced their value; it comforted their hearts; and it made their depression disappear. Attractive elements included revenue-related items, such as food carving skills connected to profits; they could open lectures; and they could open a workshop with little money. Along with this, the basic elements included the following: They could concentrate; they could feel better; they could get a certificate; and they could become an expert. They usually included the purposes the students who would learn food carving for the first time had basically.

측정기반 거동 모델을 이용한 IEEE 802.11a 무선랜용 LTCC Front-End 모듈 집적화 설계

한아름,윤경식,Han, A-Reum,Yoon, Kyung-Sik 한국통신학회 2007 韓國通信學會論文誌 Vol.32 No.5A

This paper describes the design and implementation of an integrated LTCC front-end module for the IEEE802.11a WLAN applications by performing the behavioral-level simulation using measurement-based behavioral model. To meet the IEEE802.11a WLAN standard, a system transmitting 1024 symbols through 64-QAM process at the rate of 54Mbps should be implemented and nonlinear properties are confirmed by simulations of ACPR and EVM in this circumstance. The right offsets of ACPR which are 30MHz, 20MHz, and 11MHz distant from the center frequency of 5.8GHz are 49.36dBc, 36.90dBc, and 24.58dBc, respectively. The left offsets are 50.14dBc, 30.04dBc, and 28.85dBc, respectively and EVM is 2.94%. The size of the module implemented with LTCC five-layer substrates is $13.4mm{\times}14.2mm$. The measured characteristics of the transmitter show P1dB of 16.2dBm and power gain of 16.73dB. Those of the receiver exhibit the small signal gain of 16.24dB and noise figure of 7.83dB. 본 논문에서는 IEEE802.11a 무선랜용 Front-End 집적화 초소형 모듈을 측정기반 거동 모델을 기반으로 한 behavioral-level 시뮬레이션을 수행하여 설계 제작 하였다. IEEE802.11a 무선랜 표준을 만족시키기 위해 54Mbps 전송속도의 64QAM 변조 방식 심볼을 1024개 전송하는 시스템을 구현하고 이 환경에서 ACPR과 EVM 시뮬레이션을 수행하여 비선형 특성을 확인하였다. 중심주파수 5.8GHz에서 30MHz, 20MHz와 11MHz 떨어진 ACPR의 우측 offset은 각각 49.36dBc, 36.90dBc와 24.58dB이고 좌측 Offset은 각각 50.14dBc, 34.04dBc와 28.85dBc이며 EVM은 2.94%이다. LTCC 공정을 사용하여 5층 기판으로 제작한 모듈의 크기는 $13.4mm{\times}14.2mm$이다. 송신단 특성은 P1dB가 16.2dBm, 전력이득은 16.73dB로, 수신단의 특성은 소신호 이득이 16.24dB, 잡음지수가 7.83dB로 측정되었다.

단순보 모드형상을 이용하여 변형률 신호에서 동적변위 응답 추정

신수봉(Soobong Shin),이선웅(Seon-Ung Lee),한아름샘(Ah Reum Sam Han),김현수(Hyun Su Kim),김희동(Hee Dong Kim) 한국소음진동공학회 2009 한국소음진동공학회 학술대회논문집 Vol.2009 No.4

요구분석을 적용한 디자인 문제해결 개념모델 연구

한아름(Han, A Reum),곽대영(Kwak, Dae Young) 한국디자인문화학회 2016 한국디자인문화학회지 Vol.22 No.3

시대의 흐름에 따라 디자인의 역할은 많은 변화를 가져 왔다. 디자인의 대상과 영역이 산업의 가시적인 물적 하드웨어에 머무는 것이 아닌 보이지 않는 인간의 행위와 서비스, 시스템을 모두 포괄하는 사회 시스템으로 인식됨에 따라 디자이너가 해결해야 할 문제의 범주 또한 시각적 · 물리적인 것에서 점차 비시각적 · 상황적 문제로 변하고 있다. 이러한 디자인 문제해결을 위해서는 제품과 사용자뿐만 아니라 그와 연관된 물리적 · 사회적 상호 관계에 관한 총체적인 고려가 필요하다. 이에 본 연구에서는 복잡한 상황에 대한 문제를 다양한 관점에서 분석하고 아이디어를 도출함으로써 해결하고자 하는 문제에 창의적으로 접근하기 위한 방법으로  프레임워크를 활용한 디자인 개념 모델을 제안하고, 디자인 과정에 있어서 중요하게 사용될 수 있는 가능성을 실험을 통해 검증하였다. 본 연구에서는 연구목적을 달성하기 위하여 디자인 사고, 창의적 디자인 문제해결 방법과 i* 프레임워크의 특징, 원리와 구성 등에 관한 전반적인 내용 및 연계성을 고찰하였으며, i*프레임워크를 프로세스에 적용하여 디자인 문제 해결을 위한 개념모델을 설계하였다. 한 번에 이해할 수 없는 복잡한 상황을 이해하기 쉬운 최소의 단위로 분할하고, SD · SR 모델을 통해 상호 관계성을 모델링 하고, 다시 관계 다이어그램, 역할 다이어그램, 행위 분석 다이어그램, 가치 분석 다이어그램 등 새로운 분석 모델로 연결 · 종합하였다. 이러한 실험 과정을 통해 디자인 문제를 보다 효과적이고 창의적으로 해결해 나가기 위한 다양한 시각에서 접근이 가능함을 확인 할 수 있다. 이를 통해 현실의 문제를 개념모델을 통해 해결하고, 새로운 아이디어를 창출하는데 있어서 유용하게 사용될 수 있는 가능성을 보여줌으로써 개념모델의 효용성을 평가 할 수 있었다. Roles of designs have many changes according to the changing trends of the times. As the objects and realm of design are perceived as a social system encompassing intangible human behaviors, services, and systems, not being confined to tangible physical hardware of industry. The categories of problems to be resolved by designers are also transforming gradually into non-visual and circumstantial nature away from visual and physical nature. To resolve such design issues, overall consideration needs not only products users but also physical and social interactions related to such products and users. In this study, we proposed the design concept model applying i* framework which provides to take creative approach to problems involved to being resolved by analyzing problems of complex situation to various standpoints and deriving ideas. Moreover, we validated its potential capabilities that could be tapped into importantly in the design process of experiment analysis. To achieve the objectives of this study, we examined overall aspects related to the design thinking, creative design problem-solving methodologies, characteristics, principles, structure of i* framework and considered their interrelationship. The concept model for resolution of design issues was designed by applying i* framework of the design process. This model was to promote logical and interpretative to approach for understanding essence of problems and bringing solutions to these processes. Dividing complex situations and problems into minimal units for easy to understand and modeling interrelationship based on SD · SR model. Then linking and putting together such complex situations based on new analytical models such as relational diagram, role diagram, behavioral analysis diagram, value analytical diagram for in-depth comprehension. These experimental procedures can be to make access possible way of a different perspectives of design to solve problems more effectively and creatively. This concept model demonstrated usefulness for resolving realistic problems and creating new ideas, which therefore allowed its efficiency to be assessed.

코로나19 시대 독거노인의 마스크 사용현황 및 마스크 사용지식과 사용행위 관련요인

한아름(Han, A-Reum),박연환(Park, Yeon-Hwan) 한국간호과학회 2021 Journal of Korean Academy of Nursing Vol.51 No.2

Purpose: This study analyzed the current status of face mask usage. It also identified factors related to the knowledge and behavior regarding the same among older adults living alone during the COVID-19 pandemic. Methods: This descriptive study was conducted via a telephone survey involving 283 older adults living alone in S City from March to April 2020. Knowledge and behavior pertaining to face mask usage were measured using Hilda Ho’s Face Mask Use Scale; reliability of the measurement was Kuder-Richardson formula-20 = .62, Cronbach’s α = .92. Data were analyzed using descriptive analysis, independent t-test, Pearson’s correlation coefficient, and multiple linear regression. Results: Older adults used one mask for 3.55 days on an average. The knowledge level was 9.97 (± 1.84) out of 12 and behavior level was 15.49 (± 1.55) out of 16. Level of education (β = - .31, p < .001), living region (β = .13, p = .017), personal income (β = .12, p = .041) significantly affected the face mask usage-related knowledge, and living region (β = .15, p = .010) significantly affected the face mask usage-related behavior. Conclusion: Older adults living alone are aware of the effects of using face masks. However, their mask usage is inappropriate, for example, the prolonged use of the same mask. Considering the low level of face mask usage-related knowledge, it is necessary to develop customized education programs and infectious disease prevention strategies for older adults possessing low educational levels living alone in urban-rural complex areas.

인체동작 중에 발생하는 근골격 생체정보 해석 소프트웨어 개발 및 검증

한아름(Han, Ah Reum),더리즈 아리온자야(Dorj, Ariunzaya),김윤혁(Kim, Yoon Hyuk) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11