삼중 행렬 곱셈의 효율적 연산

임은진(Eun-Jin Im) 한국컴퓨터정보학회 2006 韓國컴퓨터情報學會論文誌 Vol.11 No.3

본 논문에서는 회로 설계 소프트웨어에서 사용되는 primal-dual 최적화 문제의 해를 구하기 위해 필요한 삼중 행렬 곱셈 연산 (P = AHA<SUP>t</SUP>)의 성능 개선에 관하여 연구하였다. 이를 위하여 삼중 행렬 곱셈 연산의 속도를 개선하기 위하여 기존의 2단계 연산 방법을 대신하여 1단계 연산 방법을 제안하고 성능을 분석하였다. 제안된 방법은 희소 행렬 H의 블록 대각 구조의 특성을 이용하여 부동 소숫점 연산량을 감소시킴으로써 성능 개선을 이루었으며 더불어 메모리 사용량도 기존 방법에 비하여 50% 이하로 감소하였다. 그 결과 Intel Itanium II 플랫폼에서 기존 2단계 연산 방법과 비교하여 속도 면에서 주어진 실험 데이터 집합에 대하여 평균 2.04 의 speedup 을 얻었다. 또한 본 논문에서는 플랫폼의 메모리 지연량과 예측된 캐쉬 미스율을 이용한 성능 모델링을 통하여 이와 같은 성능 개선 수치의 가능 범위를 보이고 실측된 성능 개선을 평가하였다. 이와 같은 연구는 희소 행렬의 성능 개선 연구를 기본 연산이 아닌 복합 연산에 적용하는 연구로써 큰 의미가 있다. In this paper, we introduce an improved algorithm for computing matrix triple product that commonly arises in primal-dual optimization method. In computing P = AHA<SUP>t</SUP>, we devise a single pass algorithm that exploits the block diagonal structure of the matrix H. This one-phase scheme requires fewer floating point operations and roughly half the memory of the generic two-phase algorithm, where the product is computed in two steps, computing first Q=HA<SUP>t</SUP> and then P=AQ. The one-phase scheme achieved speed-up of 2.04 on Intel Itanium II platform over the two-phase scheme. Based on memory latency and modeled cache miss rates, the performance improvement was evaluated through performance modeling. Our research has impact on performance tuning study of complex sparse matrix operations, while most of the previous work focused on performance tuning of basic operations.

두피온욕이 두피관리에 미치는 영향에 관한 연구

임은진 ( Eun Jin Im ) KAT 한국두피모발관리사협회(KST 한국두피모발미용학회) 2005 대한미용학회지 Vol.1 No.1

서울지역 거주 성인 모발의 유해 중금속 함량 분석

임은진 ( Eun Jin Im ),하병조 ( Byung Jo Ha ) 대한화장품학회 2009 대한화장품학회지 Vol.35 No.1

인간의 모발은 금속을 배설하는 시스템이며 몸에서 금속의 함유량을 반영한다. 본 연구에서는 현대인의 유해 중금속 노출 정도를 파악하고, 질병 예방 혹은 환경 개선 예측의 도구로서 모발 분석의 필요성에 대해 알아보고자 하였다. 많은 만성 질환은 금속의 축척과 관련이 있을 것으로 예상되며 몇몇은 유해 중금속과 관련이 있다. 이에 서울, 수도권지역에 거주하는 20대에서 40대의 성인 남녀 120명(남자 61명, 여자 59명)을 대상으로 시료를 채취한 후 유도 결합플라즈마 질량 분석기를 사용하여 Hg, Pb, Cd, Al, As, U, Bi, Sb, Ba, Be의 10가지의 독성 미네랄의 함량을 측정하였다. 분석 결과 20대의 유해 중금속 함량 분석에서는 기준치 이상을 보이는 원소가 없었으나, 알루미늄(Al)과 안티몬(Sb)의 수치가 높게 나타났다. 30대의 경우도 기준치 이상의 원소는 보이지 않았으나 수은(Hg)과 알루미늄(Al)의 농도가 높게 나타났다. 40대의 경우 기준치 이상의 수은(Hg)과 안티몬(Sb)이 검출되었다. 또한 성별에서는 남성의 경우 수은(Hg)이, 여성의 경우 안티몬(Sb)이 기준치보다 높은 것으로 나타났다. 산업의 발달로 인해 유해 중금속은 여러 가지 경로를 통해 우리 몸속으로 들어오며, 몸 밖으로 배출되지 못하고 인체에 계속 쌓여 면역 기능과 호르몬 기능이 저하시키고 질병을 유발하게 된다. 이에 유해 중금속의 노출 정도를 분석하여 그에 맞는 대체요법을 시행한다면 질병을 예방하고 환경을 예측할 수 있다. 인체 내에 중금속의 추적 상태를 알아보기 위해 우리나라에서도 모발 분석에 대한 관심과 연구를 통해 우리의 건강 상태를 유지하기 위한 수단으로 활용되기를 시사하는 바이다. Human hair is an excretory system for trace metals and thus metal content in human hair can reflect the body status. The investigation of trace elements in human hair has been correlated with the diagnosis of various diseases as well as the monitoring of deficiency statues in nutrition. Many chronic diseases may be related to mineral status, some may be related to toxic mineral. Hair samples were collected from 120 inhabitants of the city of Seoul, Korea. In this study the concentrations of 10 elements (Hg, Pb, Cd, Al, As, U, Bi, Sb, Ba, Be) in hair were determined by inductively coupled plasma mass spectroscopy (ICP-MS). The conclusions showed that people in Seoul, Korea were affected by some kinds of toxic minerals. The Hg concentrations of male are higher than those of female and reference range. The mean concentration of Sb was higher in the female than male and reference range. In age distribution, the mean concentration of Hg was in 40's are higher than 20's and 30's and reference range. The concentrations of Al were the highest in the 20's. After analyzing, we concluded that a compounded treatment should be conducted, which considers the variety of factors related to detoxification.

20대 남성의 신체이미지와 헤어스타일 인식과의 관계

임은진(Eun Jin Im),김명우(Myung Woo Kim) 한국디자인문화학회 2014 한국디자인문화학회지 Vol.20 No.2

외모가 경쟁력으로 인식되는 사회분위기 속에서 남성들의 외모 관리 행동이 증가하고 있다. 이에 남성들이 헤어스타일로 개성을 표현하는 것은 개성 및 신체이미지와 밀접한 관련이 있다. 본 연구는 20대 남성의헤어스타일과 신체이미지 인식 간의 관계를 조사하여 미용 시장에서의 소비 증가 및 고객 만족을 위한 기초적 자료를 제공하고자 한다. 본 조사는 서울 수도권에 거주하는 남성 405명을 대상으로 진행되었으며, 자료분석은 SPSS v. 14.0로 요인분석, 독립표본 t-test, 일원변량분석, 빈도분석, 교차분석 및 상관분석을 실시하였다. 결과는 다음과 같다. 첫째 신체이미지는 신체만족도, 외모지향도 및 외모평가도의 3요인으로, 헤어스타일 인식은 관리인식도, 관심인식도 및 유행인식도의 3요인으로 분석되었다. 현재 헤어스타일은 대부분 중간길이에 형태는 쇼트스타일, C컬웨이브와 타원의 얼굴형으로 나타났다. 또한 신체이미지 인식이 높을수록 헤어스타일 인식도 높아지는 상관관계를 보였다. The appearance-management behaviors of men is on the increase in a social atmosphere that appearances is recognized as the competitiveness, which the expression of personality as a male hair style is closely related to the characteristic and body image. The purpose of this study is to provide basic data for their satisfaction and increase of sales in the beauty market by inquiring into the interaction with the recognition of hair style and body image in twenties. A survey was made on 405 men in the Seoul Metropolis and the other area in Korea. The SPSS(Statistical Package for Social Science) v. 14.0 was applied to factor analysis, independent-samples t-test, One way ANOVA, frequency analysis, cross tabulation analysis and correlation analysis were made. The results of this study were as follows. First, the body images are classified as 3 sub-factors such as satisfaction with the body, appearance-orientation and appearance evaluation. The recognition of hair style are also classified as 3 sub-factors such as interest with the hair, management and trend. Analysis of hair style showed that there were the most men preferring middle length of hair, short-cut style, ``volum C curl`` wave and oval face. In case the level of satisfaction of body image increases, the recognition of hair style get higher. The limitation of this study is that the numerical value in age and the illustration types of male hair style was not various.

헤어 미용실 서비스의 단계별 실패와 불평 행동이 고객 재방문 의도에 미치는 영향

임은진 ( Eun Jin Im ) 대한미용학회(구 대한미용과학회) 2021 대한미용학회지 Vol.17 No.1

Beauty service industry, unlike other industries, requires management at all touch points of customer contact from start to finish. This is because in this industry, the contact time with the clients is long and the customers are the main agents in the processes of the service. The current study aimed to investigate the relationships between service delivery process failure, complaint behavior, and revisit intention in hair salons. A survey was conducted using questionnaires via both online and offline among hair salon's female clients in their 20s and 40s. The main results obtained are as follows. First, the higher the chances of failure in hair consultation, customer service, and payment and exiting, the lower the intention to revisit. The faster the direct and word-of-mouth responses to customers, the lower the intention to revisit. The mean values of the variables of the sub-items of the overall service delivery process failure and complaint behavior were higher for women in the 40’s age group than those in the 20s’age group. The female clients in their 20’s appeared to have relatively higher intention to revisit compared to the women in their 40’s. The middle-aged women’s perception on related services was presumed to be more sensitive and thought to influence the revisit intention. Although immediate responses to complaint behavior is warranted, the above findings indicated that preventing client’s complaint behavior in advance is all the more important and thorough consideration and client observation in the service delivery process is critical. To this end, client communications need to be included in the service education manuals provided to the employees. Although hairdressing skills are essential, hairdressers need to minimize mistakes in each stage of hair consultation, customer services, and customer’s path in MOT during payment and exiting.

연구논문 : 남성형탈모증과 여성형 탈모증의 모발미네랄 함량 분석

임은진 ( Eun Jin Im ),이주영 ( Ju Young Lee ) 한국미용학회 2007 한국미용학회지 Vol.13 No.3

Minerals play important roles in biological processes. They can cause diease through deficiency, imbalance and toxicity. Many chronic dieases may be realted to mineral status. The measurements of body mineral status are usually done for body fluid, hair mineral analysis method showed potentiality as a useful clinical tool. The study has been conducted using methods for classification by age morphology intended for 70 patients in hospital in M clinic, for efficient management fo hair loss. The conclusions showed that hair loss was affected more by acquired, such as inheritance and over secretion of sebum, currently known as main causes hair loss. Male and Female pattern alopecia results from deficiencies of sodium(Na), potassium(K), copper(Cu), zinc(Zn), iron(Fe), manganese(Mn), and selenium(Se). The Calcium(Ca) concentration of Male pattern alopecia(MPA) is lower than female pattern alopecia(FPA). The phosphoous(P) and sodium(Na) concentration of FPA are lower than MPA. In Age distribution, the sodium(Na), Potassium(K) and iron(Fe) concentration in 40`s are lower than 20`s and 30`s. The zinc(Zn) concentration in 20`s is lowest. After analyzing, we concluded that a compounded treatment should be conducted, which considers the variety of factors which can account for hair loss.

화장품시장에서의 두피,모발 화장품에 관한 연구

임은진 ( Eun Jin Im ),김혜란 ( Hye Ran Kim ) 한국미용학회 2008 한국미용학회지 Vol.14 No.3

In pursuing the beauty, hair plays a considerable part and with the change of beauty sense, ornamental function of hair has been emphasized. Also owing to the excessive purse of hair change, feeling and color, sudden hair damage has occurred. Various chemical treatment, pollution and severe stress have brought out serious hair problems. Many people need the hair care and alopecia products for their health. In 2007, the market of hair care has been growing. The purpose of this study is to understand the products of hair care and predict its market growing.

헤어 디자이너의 인사관리 만족도에 관한 연구

임은진 ( Eun Jin Im ) 한국미용학회 2007 한국미용학회지 Vol.13 No.1

ICP-MS를 활용한 탈모증 유무에 따른 모발의 영양 미네랄 함량 비교

임은진 ( Eun Jin Im ),조찬휘 ( Chan Hwi Cho ) 한국미용학회 2011 한국미용학회지 Vol.17 No.6

The purpose of this study was to examine the amounts of minerals in hair between adults with and without alopecia so as to provide basic information on the mineral imbalance in people with alopecia and help the treatment for alopecia. The participants are adults from Seoul in their twenties to forties who are divided into two groups; people with alopecia and without alopecia. ICP-MS (Inductively Coupled Plasma Mass Spectrometer) is used to analyze the participants` hair. According to the preceding data, there are 9 nutritive minerals (Zn, Mn, Cu, Se, Fe, Na, Ca, Mg, S) can affect the hair loss. The followings are the result that analyzes these minerals. Among the nutritive minerals, there were significant main effects of gender and the presence of alopecia in the levels of Zn. Male group showed lower level of Zn compared with female group. And participants of alopecia showed lower level of Zn compared with participant of nonalopecia. Theses findings suggested the imbalance of mineral levels in hair could be problematic and compromise the hair management for optimal condition.

골근테라피가 골반 각도에 미치는 영향

임은진 ( Eun Jin Im ),김명우 ( Myung Woo Kim ),김정숙 ( Joung Sook Kim ) 한국미용학회 2013 한국미용학회지 Vol.19 No.4

This study was carried out to qualitatively examine the effect of Bone-Muscle Therapy on pelvis tilt. In the research, the Bone-Muscle Therapy was carried out to do pelvis treatment. 2 times a week, total 8 times for 4 weeks on women in their 20s-40s. ‘Shisei Innovation System Ver.9.0 (PA200. Made in Japan)’ was used to analyze. After Bone-Muscle Therapy, the angle between left ASIS(Anterior Superior Iliac Spine) and PSIS(Posterior Superior Iliac Spine) decreased by 14.04 mm (p>.05) after Bone-Muscle Therapy. The angle between right ASIS and PSIS decreased by 10.00 mm (p>.05). By above-mentioned findings, Pelvis treatments in Bone-Muscle Therapy is likely to be an effective treatment for the recovery of neutral pelvis position.