HDFS의 스몰 파일 관리 기술 동향

심아름(Sim,A-Reum),박희정(Park,Hee-Jung),윤희용(Youn,Hee-Yong) 한국IT서비스학회 2014 한국IT서비스학회 학술대회 논문집 Vol.2014 No.추계

HDFS(Hadoop Distribute File System)는 오픈소스 프레임워크로 대표적인 빅 데이터 처리 분산 응용 프로그램이다. 대용량 데이터를 처리에 최적화되어 스몰 파일에 적용했을 때 높은 자원 소비효율과 낮은 성능을 보인다. 본 논문에서는 이러한 비효율성을 해결하기 위한 기법을 제시한다. 첫 번째로 HDFS와 독립적으로 작동하는 엔진을 통해 스몰 파일을 합 병하는 방법이다. HDFS 내부의 메모리 사용량을 줄임으로써 스몰 파일을 처리할 때 효율성이 증가한다. 두 번째로 구조화된 인덱스 파일 합병기법이다. 효율적인 접근과 파일 처리를 통해 응답 시간을 단축하고 메모리 사용이 감소한다. 제시된 기법을 통해 HDFS가 대용량 데이터뿐 아니라 스몰 데이터를 분산 저장 및 처리하는데 있어서 공간의 이용이 효과적 으로 이루어 질 것을 기대한다.

기성상업지 환경정비형 지구단위계획 설계요소를 적용한 대중교통전용지구 계획 요소별 중요도 평가

심아름(Shim, Ah-Rum),강준모(Kang, Jun-Mo),김승원(Kim, seung-won),이제풍(Lee, je-poong) 도시정책학회 2017 도시부동산연구 Vol.8 No.1

This study, with the aim of improving the problems in the exclusive use district for public transportation planning, and promoting integral, concrete planning, examined the planning status of the already established commercial area environmental arrangement-type district unit plan, and did comparative analysis of its design elements. In addition, this study, on the basis of the elements through comparative analysis, suggested the design elements in a new exclusive use district for public transportation for promoting the integrated plan for the exclusive use district for public transportation. And deducted the design elements which meet the development purposes through urban planning experts, and transportation experts’ importance verification. Looking into the importance results between the design sectors on the exclusive use district for public transportation deducted by this study, it was found that both of the two expert groups evaluated that the urban design sector is relatively more important than the transportation facility design sector for integral, concrete planning that meets the purpose of the exclusive use district for public transportation. In addition, looking into design element importance by each design sector, urban planning experts, and transportation experts evaluate building arrangement plan, and street furniture, and moving line connection system in the city planning sector, and sidewalk, means of public transportation, and pedestrian facilities, etc. in transportation facilities planning sector, respectively as the most important elements unanimously, revealing the above mentioned elements are the important design elements in the exclusive use district for public transportation.

피부유형에 따른 딥클린저의 각질제거 효과 비교

윤영한,심아름,김래경,김보란,남궁현,김기영 한국피부과학연구원 2009 대한피부미용학회지 Vol.7 No.4

Few years ago, peeling is useful procedure for cosmetic improvement of skin such as remove dead surface cells from the stratum corneum or for treatment of some skin disorders. So that, the aim of this study is effect of keratolysis and content of moisture and sebum in dry skin and oily skin by treatment of three different deep cleanser. 18 volunteers (6 men and 12 women) were divided to 2 groups such as dry skin and oily skin, and face of volunteers were treated with biological (enzyme)-, physical (scrub)-, and chemical (15% glycolic acid)-deep cleanser in 2 weeks. Content of sebum, moisture and keratin was measured before and after cleansing and deep cleansing on face by using of skin diagnostic instrument. In the result, the highest decreasing of sebum content was shown in treatment of chemical deep cleanser (25.4%) in dry skin and physical deep cleanser (59.9%) in oily skin. The highest decreasing of moisture content was revealed in dry and oily skin after chemical deep cleansing(40.2%, 46.8%). Decrease percentage of keratin is as a remove superfical keratin that was the highest value in dry skin by treatment of physical deep cleanser (17.9%) and in oily skin by chemical deep cleanser(38.8%). And the best effect of surface keratin remove was revealed in dry skin and oily skin by treatment of physical and chemical deep cleanser in observation of skin analysis instrument. Thereby, melanin depigmentation was appeared in oily skin after using of chemical deep cleanser. In conclusion, biological deep cleanser may be used better for dry oily skin, physical deep cleanser for dry skin and chemical deep cleanser for oily skin and/or acne skin with white- and black head acne. 필링제는 의학분야를 넘어서 미용분야에서도 사용되고 있다. 본 논문에서는 진피의 손상과 피부 화상을 유도하는 의학적 필링제가 아닌 미용에서 사용할 수 있는 딥클린저(물리적, 화학적, 생물학적)의 효과를 비교하고자 20대 남성 6명과 여성 12명의 동의를 얻어 건성피부와 지성피부로 구분하고 일주일에 1회씩 2주간 시술하여 피부진단기로 유·수분의 변화와 각질량의 변화를 분석 및 관찰하였다. 그 결과, 유분량의 감소가 가장 크게 나타난 것은 건성피부에서 화학적 딥클린저가 25.4%, 지성피부에서 물리적 딥클린저가 59.9%이었다. 수분량의 변화는 화학적 딥클린저가 건성피부에서 40.2%, 지성피부에서 46.8%가 감소하였다. 각질량은 건성피부에서 물리적 딥클린저가 17.9%이었고, 지성피부에서 화학적 필링제가 38.8%로 가장 크게 감소하였다. 20배의 배율에서 건성피부와 지성피부를 관찰했을 때 물리적 그리고 화학적 딥클린저는 각질 제거와 함께 모공 주위가 깨끗해지고, 흑면포가 많이 제거되었으며, 두 딥클린저 사이에는 효과의 차이는 크게 나타나지 않았다. 생물학적 딥클린저는 유․수분량 그리고 각질량의 감소가 다른 두가지 딥클린저 보다 낮았고, 육안적 확인에서도 각질제거 효과가 가장 약했다. 따라서 화학적 딥클린저는 유․수분과 각질량의 감소 폭이 크기 때문에 여드름, 백면포와 흑면포가 많은 지성피부에 효과가 좋고, 생물학적 딥클린저는 유분 감소가 다른 딥클린저보다 낮기 때문에 지건성 피부 그리고 물리적 딥클린저는 수분 감소와 각질 감소가 화학적 딥클린저 보다 낮기 때문에 수분이 부족한 건성피부에 사용하는 것이 더욱 좋은 효과를 기대 할 수 있다고 사료된다.

Poly(p-phenylene terephthalamide) oligomers analysis using direct Infusion-mass spectrometry (DI-MS)

정영한,심아름,남궁현 한국분석과학회 2018 학술대회논문집 Vol.2018 No.5

국내 거주 다문화청소년의 문화적응 스트레스에 관한 체계적 문헌고찰

신혜형,심아름,정소영 다문화아동청소년연구원 2023 다문화아동청소년연구 Vol.8 No.1

본 연구에서는 체계적 문헌고찰방법을 통하여 다문화청소년의 문화적응 스트레 스에 관한 연구동향을 살피고 실천적 함의를 도출하고자 하였다. 이에 한국학술 정보(KISS)와 학술연구정보서비스(RISS), 한국학술지인용색인(KCI), 학술교육원 (e-Article) 총 4개의 데이터베이스에 다문화청소년, 문화적응을 키워드로 조합하 여 기간에 제한을 두지 않고 2022년 10월 15일까지 국내 학술지에 발표된 다문 화청소년 문화적응 스트레스 문헌 총 168건의 논문을 검색하였다. 4단계를 거쳐 관련이 없거나 질평가(Qualsyt)를 통해 부적합한 문헌들을 제외하고 최종 48건 의 문헌을 선정하여 분석하였다. 연구결과, 첫째로 문화적응 스트레스와 관련된 변인으로는 크게 심리적 변인, 학교생활관련 변인 및 가족 및 부모 변인으로 파 악되었다. 심리적 변인으로는 자아존중감과 우울에 대한 분석빈도가 높았으며, 학교변인의 학교적응과 가족변인의 가족지지에 대한 분석빈도가 높았다. 대부분 의 연구에서 문화적응 스트레스와 자아존중감은 부적 상관관계를 가지며, 이는 학교적응에도 영향을 미치며 가족 및 부모의 지지는 문화적응 스트레스를 완화 하는 데 긍정적인 역할을 하는 것으로 파악되었다. 이러한 결과를 토대로 후속 연구 및 실천적 개입을 위한 방안을 제시하였다. The purpose of this study was to examine the research trends on acculturative stress of multicultural adolescents and to derive insight for further research by using a systematic literature review method. Based on four web databases, KISS, KCI, e-Article, and RISS, 168 articles on the acculturative stress of multicultural adolescents published by October 15, 2022, were searched by using the following keywords, acculturative stress, multicultural adolescents. 48 articles met the inclusion criteria after excluding those that were unrelated or inappropriate through quality assessment with Qualsyt. As a result, the variables related to acculturative stress were largely identified as psychological factors, school life-related factors, and family and parent factors. As psychological factors, self-esteem and depression were the most frequently used, followed by school adaptation and family support respectively. In most studies, acculturative stress and self-esteem were negatively correlated, which affects school adaptation. Family and parent support play a positive role in alleviating acculturative stress. Based on these results, implications for follow-up research and practical intervention were suggested.

국내 다중이용시설에서의 PM2.5와 PM10 농도분포 특성

원수란,임정연,심인근,김은주,최아름,한진석,이우석 한국실내환경학회 2012 한국실내환경학회지 Vol.9 No.3

The aim of this study is to analyze the distribution of particulate matters including PM2.5 which is known for severe adverse health effect than PM10 in public facilities. The total 40 public buildings are investigated in this study and they are classified into 11 sub-groups as follows : child-care centers, medical centers, libraries, museums, bus terminals, ports, airports, railway terminals, subway stations, large-scale stores, and indoor parking lots. The mean concentration of PM10 was 38.6㎍/㎥ and that of PM10 in all studied facilities were lower than the Ministry of Environment's control standards. The average concentration of PM2.5 was 27.2㎍/㎥ and that of PM2.5in 18 facilities were exceed the guideline of WHO (24h average value : 25㎍/㎥). The subway stations had the highest indoor level of particulate matters and the waiting area in bus terminals, railway terminals, indoor parking lots had followed in order. When comparing mean value of I/O ratio of PM10, the only I/O ratio of subway stations were greater than one. In the case of PM2.5, however, the average concentrations of PM2.5in indoors of subway stations, bus terminals, and indoor parking lots were higher than those of PM2.5 in outdoors. The mean concentration of PM10 and PM2.5 were gradually increased between 6 A.M and 10 A.M and after 6 P.M in most of target buildings with increasing the number of users in thest facilities.

자초를 이용한 립밤의 활용성 검색

박보름,김광상,박해련,심아름,신규옥,안경민,김기영 한국미용학회 2009 한국미용학회 추계학술발표회 Vol.2009 No.1

서울시민의 행복요인과 정책적 시사점

고준호,백선혜,안기정,심아름,이유미 서울연구원 2017 서울연구원 정책과제연구보고서 Vol.- No.-

IP 주소 검색을 위한 블룸 필터를 적용한 새로운 리프푸싱 트라이

이정원(Jungwon Lee),심채연(Chaeyun Shim),박슬기(Seulki Park),이보경(Bokyung Lee),황아름(Areum Hwang),임혜숙(Hyesook Lim) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.11

This paper proposes a new IP address lookup algorithm which applies a Bloom filter for the prefix search in a leaf-pushing trie. The proposed approach is differentiated from a previous approach in the way of programming the Bloom filter. The proposed algorithm in this paper does not program every node in a trie but programs internal nodes with at least a prefix child. Hence the Bloom filter size is greatly reduced. In addition, the proposed algorithm starts the search process from the longest length, which is 32 bits in IPv4, in order to utilize the characteristic of the leaf-pushing trie. Simulations using actual routing tables show that the proposed approach achieves less than 1.25 number of hash table accesses in average to perform an IP address lookup.

대학생의 화장품 구매행동에 관한 조사 연구

최은미(Eun-mi Choi),심아름(A-Reum Sim) 한국보건복지학회 2009 보건과 복지 Vol.11 No.-

A survey was conducted to 337 students enrolled in 4 colleges and 3 universities in Jeollabuk province in an attempt to investigate their behavior of purchasing cosmetics and compare and analyze the difference in their behaviors between gender with a view to provide basic data necessary for production plans of cosmetics manufacturers and sales and marketing plans of logistic companies, and also to give guidelines for collegians to refer to for wise spending of their money for cosmetics. From the analysis, it was revealed that there was statistically significant difference by gender in factors such as amount of purchasing cosmetics (χ2=47.655, P=.000), main decision makers for purchase (χ2=34.762, P=.000), payers for purchase (χ2=14.560, P=.006), purchasing places (χ2=16.947, P=.009), kinds of cosmetics they want to get as gifts (χ2=68.376, P=.000) and factors for selecting cosmetics. It is therefore suggested for manufacturers and logistic companies of cosmetics to work out active and direct promotion, advertisement, presentation and provision of test products to female students who visit cosmetic shops. For male students, on the other hand, emphasis should be placed on providing basic information to ensure them to compare prices among manufacturers and also objective and versatile depth information through internet shopping malls. First of all, efforts should be made to offer precise and detailed instruction about proper usage and effects of cosmetics as they are essential products related directly to skin health in their daily living. On the part of cosmetic market, skin care-related industry and diet food market that have grown with a great volume and potential, they should join the endeavors to instruct consumers to keep their skin healthy and beautiful by focusing rather on educational activities like distribution of informative data about skin care and reasonable selection of proper cosmetics as well as field education, than focusing exclusively on sales-oriented advertisements.