예측성능 제고를 위한 범용크리깅과 지시크리깅의 결합

고혜지,박만식 한국자료분석학회 2014 Journal of the Korean Data Analysis Society Vol.16 No.4

A general spatial dataset composes of the measurements of our interest and their location information. When we usually analyze the data in order to detect the underlying spatial associations we take the relative positions (distance and angle) between arbitrary two measuring locations into account. It is naturally implied that, in practical geo-statistical data, spatial association increases as two locations get close to each other and decreases as they get distant. This phenomenon is modeled by a covariance model which is founded on the 2nd order stationarity. In this paper, we propose new techniques for producing more reliable spatial predictions as we combine prediction outcomes obtained from the universal kriging with those from the indicator kriging, each of which realized both an isotropic covariance model and a anisotropic one. In order to evaluate the prediction performances of our proposal, we employ leave-one-out cross-validation approach and compare the predictions with the observations in terms of accuracy, sensitivity, and specificity. 공간통계학(spatial statistics)에서 다루는 공간 자료(spatial data)는 연구에 관심이 되는 변수에 관한 측정값과 이를 관측하는 위치정보(location information)로 구성된다. 공간 자료를 이용한 공간상관성 분석을 수행함에 있어 위치 지점(location point)들 간의 상대적 위치 차이(거리와 방향)를 고려하게 된다. 지리통계학적 자료(geostatistical data)를 분석하는 경우 임의의 두 위치 지점 사이의 거리가 짧을수록 높은 상관성을 나타낼 수 있는 측도로 공분산모형(covariance model)을 사용한다. 이는 정상성(stationarity) 가정을 전제로 하는데 공간 상관성이 거리에만 의존하는 경우에는 등방성 공분산 모형(isotropic covariance model)을, 거리와 방향을 함께 고려하는 경우에는 비등방성 공분산 모형(anisotropic covariance model)을 적용한다. 임의의 위치 지점에 관한 미지의 관측값을 구하기 위한 공간 예측방법인 지시크리깅(indicator kriging)과 범용크리깅(universal kriging) 하에서의 등방성 및 비등방성 모형의 예측성능을 비교하고, 각각의 크리깅 결과를 이용한 최적의 예측결과를 얻기 위한 방법을 제안하고자 한다. 예측성능을 확인하기 위해 교차검증방법(cross-validation)을 적용하여 실제값과 예측값을 이용한 오분류를 평가하고자 한다.

공간자료의 기하학적 비등방성 연구

고혜지,박만식,Go, Hye Ji,Park, Man Sik 한국통계학회 2014 응용통계연구 Vol.27 No.5

Isotropy is one of the main assumptions for the ease of spatial prediction (named kriging) based on some covariance models. A lack of isotropy (or anisotropy) in a spatial process necessitates that some additional parameters (angle and ratio) for anisotropic covariance model be obtained in order to produce a more reliable prediction. In this paper, we propose a new class of geometrically extended anisotropic covariance models expressed as a weighted average of some geometrically anisotropic models. The maximum likelihood estimation method is taken into account to estimate the parameters of our interest. We evaluate the performances of our proposal and compare it with an isotropic covariance model and a geometrically anisotropic model in simulation studies. We also employ extended geometric anisotropy to the analysis of real data.

기능성 가공과 봉제방법 변경을 통한 군용 방한 피복의 봉합강도 개선방안 고찰

고혜지,김지훈 한국산학기술학회 2022 한국산학기술학회논문지 Vol.23 No.9

군용 방한복 상의 내피(방상내피)는 동계에 전투복 위에 착용하는 방한피복으로 퀼팅원단을 사용해 보온성을 부여하고 있다. 방상내피의 경우 착용 및 세탁소요가 많아 내구성을 확보하지 않으면 솔기부분이 쉽게 뜯어지거나 미어질 수 있다. 본 연구에서는 방상내피의 원단인 퀼팅원단의 솔기 봉제방법 및 가공제 처리 함량에 따라 솔기 봉합강도를 증가시키고 제품의 내구성을 높이는 방법에 대해 연구하였다. 일반적으로 방상내피 원단의 품질기준은 규격화되어 있어 원단의 강도를 변경하는 것 보다는 비교적 간단한 방법을 통해 솔기 봉제 방법을 변경해 봉합강도를 증대시키고 다음과 같은 결과를 얻을 수 있다. 본봉과 오버록 봉제를 할 때보다 한 번의 공정인 인터록 봉제를 할 때 강도가 증가하고 공정 단계를 줄여 작업 효율성을 확보하는 효과를 보여주었다. 또한 원단 가공제의 함량을 10 %에서 3 %로 줄였을 때 올빠짐 현상이 감소하고 봉함강도가 높아지는 결과를 보여주었다. 이는 원단과 재봉사의 강도를 조절하지 않고도 솔기의 강도를 향상시키고 제품의 내구성을 높일 수 있음을 나타낸다. Military winter inner clothing(top) is worn over combat uniforms in the winter season, and quilted fabrics are used to provide warmth. Because it requires much wear and washing, the seams may easily burst or slip if durability is not ensured. This study looks at how to increase the seam strength and durability of the product according to the seam stitching method and content of processing agent. In general, the quality of winter inner clothing fabric is standardized, so it is possible to increase the seam strength by changing the seam stitching method through a relatively simple method for the fabric. This showed the effect of securing work efficiency by increasing the strength and reducing the steps of the process when sewing interlock stitching compared to sewing a lock stitch and overlock together. In addition, when the content of the fabric processing agent was reduced from 10% to 3%, the result showed that the seam strength was higher than when the missing yarn phenomenon occurred. This indicates that it is possible to improve the seam strength and increase the product durability without adjusting the strength of the fabric and sewing thread.

민간 컬러관리체계의 Spin-on을 통한 군용 피복・장구류 색 관리 효율화 방안 연구

고혜지,김성욱,이민희,임소정,오영순,홍성돈 국방기술품질원 2020 국방품질연구논집 Vol.2 No.2

The color of clothing and equipments used in Korean military has been selected in consideration of the operating environment or characteristic of products. Except for combat uniforms, however, most of their color were managed with private color name or sample reference without standard color. In this case, differences in the base color may occur frequently in each contract, making it more difficult to control the color of the product. To solve this problem, the purpose of this study was to analyze the color management system of the civil and to present a plan that could be applied to the military. As a results of this study, based on the results of the investigation and analysis of the feasibility of using color books by the civil system, the possibility of color management and presentation of colors with less difference from existing items being procured was confirmed.

Hyperpolarization: Sensitivity Boost in Magnetic Resonance Spectroscopy and Imaging

고혜지,공경현,정기진,최익장,서형림,이영복 한국자기공명학회 2015 Journal of the Korean Magnetic Resonance Society Vol.19 No.3

Hyperpolarization methods are the most emerging techniques in the field of magnetic resonance (MR) researches since they make a contribution to overcoming sensitivity limitation of MR spectroscopy and imaging, leading to new fields of researches, real-time in vivo metabolic/molecular imaging and MR analysis of chemical/biological reactions in non-equilibrium conditions. Make use of enormous signal enrichments, it becomes feasible to investigate various chemical and biochemical systems with low γ nuclei in real-time. This review deals with the theoretical principals of common hyperpolarization methods and their experimental features. In addition, more detailed theories, mechanisms, and applications of dissolution dynamic nuclear polarization (D-DNP) are discussed.

후기 청소년이 지각한 부모의 심리적 통제와 정서표현양가성의 관계에서 무조건적 자기수용과 정서인식명확성의 매개효과

고혜지,이수림 학습자중심교과교육학회 2023 학습자중심교과교육연구 Vol.23 No.23

목적 본 연구는 후기 청소년이 지각한 부모의 심리적 통제와 자녀의 정서표현양가성의 관계에서 무조건적 자기수용과 정서인식명확성의 매개효과를 검증하는 데에 목적이 있다. 방법 이를 위해 전국 19~24세 남, 여 후기 청소년 461명을 대상으로 설문을 통해 자료를 수집하였으며 SPSS 29.0과 PROCESS Macro 4.1프로그램을 사용하여 신뢰도 분석, 기술통계 분석, 상관분석, 매개효과 분석을 하였고, 부트스트래핑을 실시하여 간접효과 유의성을 검증하였다. 결과 연구의 주요 결과는 다음과 같다. 첫째, 부, 모의 심리적 통제, 무조건적 자기수용, 정서인식명확성, 정서표현양가성 간 유의한상관이 나타났다. 둘째, 부, 모의 심리적 통제와 정서표현양가성의 관계에서 무조건적 자기수용의 완전매개효과가 나타났다. 셋째, 부의 심리적 통제와 정서표현양가성의 관계에서 정서인식명확성의 부분매개효과가 나타난 반면 모의 심리적 통제의 경우 정서인식명확성의 완전매개효과가 나타났다. 넷째, 부, 모의 심리적 통제와 정서표현양가성의 관계에서 무조건적 자기수용, 정서인식명확성의 순차적 매개효과가 나타났다. 결론 부모의 심리적 통제를 높게 지각한 후기 청소년이 정서표현양가성을 경험하게 되는 과정에 대한 이해를 넓히고, 이 관계를 매개하는 무조건적 자기수용, 정서인식명확성이라는 개인 내적 기제를 밝힘으로써 부모의 심리적 통제를 경험하고 정서 표현 갈등을 호소하는 후기 청소년을 위한 상담 및 교육 프로그램의 방향성과 기초 자료를 제공하였다. Objectives This study aims to verify the mediating effect of unconditional self-acceptance and emotional clarity in the relationship between parental psychological control perceived by late adolescents and ambivalence over emotional expressiveness. Methods To this end, 461 male and female late adolescents aged 19 to 24 nationwide were surveyed, and reliability analysis, descriptive statistics analysis, correlation analysis, and mediating effect analysis were performed using SPSS 29.0 and PROCESS Macro 4.1 programs, and bootstrapping was performed to verify the significance of indirect effects. Results The main results of the study are as follows. First, there was a significant correlation between psychological control of father and mother, unconditional self-acceptance, emotional clarity, and the ambivalence over emotional expressiveness. Second, there was a complete mediating effect of unconditional self-acceptance in the relationship between psychological control of father and mother and the ambivalence over emotional expressiveness. Third, in the relationship between psychological control of father and the ambivalence over emotional expressiveness, there was a partial mediating effect of emotional clarity, whereas in the case of psychological control of mother, there was a complete mediating effect of emotional clarity. Fourth, in the relationship between psychological control of father and mother and the ambivalence over emotional expressiveness, there was a sequential mediating effect of unconditional self-acceptance and emotional clarity. Conclusions Expanding the understanding of the process in which late adolescents who highly perceive their parental psychological control experience ambivalence over emotional expressiveness. By revealing the internal mechanisms of unconditional self-acceptance and emotional clarity that mediate this relationship, the direction and basic data of counseling and education programs for late adolescents who experience parental psychological control and complain of emotional expression conflicts were provided.

1P-220 The thermal property of silica aerogels composited rigid polyurethane foam

고혜인,홍창국 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.0

아동학대 신고의도에 영향을 미치는 요인 탐색: 학대유형과 성별의 상호작용, 아동학대 신고에 대한 해석수준

고혜인,김성봉 한국감성과학회 2019 감성과학 Vol.22 No.2

This study explored measures to promote the reporting of child abuse, instances of which are increasing year after year. To this end, 16 cases of child abuse, encompassing four instances of each of the four types of child abuse (physical, neglect, sexual, and emotional), were presented to participants to examine whether the perception of each type of abuse affected the degree of its perception as a case of child abuse. Next, the effects of the four types of child abuse on the intention to report child abuse (low vs. high) were investigated in terms of gender (male vs. female) and the construal level. The results revealed that the participants' differed in the intent to report child abuse, depending on varied factors despite the fact that they perceived all cases as child abuse. In particular, no difference was found between men and women in their intent to report child abuse for cases of physical abuse and neglect. However, women exhibited a stronger intent than men to report sexual and emotional abuse. Further, the intention of reporting child abuse was stronger at the high construal level (related to why child abuse must be reported) than it was at the low construal level (concerned with what to do about child abuse). The practical implications of this study include the provision of educational content, the creation of publicity materials that place differing emphases on sex, and the application of low construal level education for reporting child abuse. 본 연구는 매년 발생 건수가 증가하고 있는 아동학대 신고를 증진시킬 수 있는 방안을 탐색하기 위해 이루어졌다. 이를 위해 아동학대 네 가지 유형별(신체 vs. 방임 vs. 성 vs. 정서)로 4개 씩 총 16개의 아동학대 사례를 구성한 후, 각 유형별로 아동학대라고 지각하는 수준이 다른지를 확인하다. 이어서 아동학대 유형별(신체 vs. 방임 vs. 성 vs. 정서), 성별(남 vs. 여), 그리고 아동학대 신고에 대한 해석수준( 저 수준 vs. 고 수준)이 아동학대 신고의도에 미ㅣㅊ는 효과도 검증해 보았따. 결과적으로 참가자들은 아동학대의 모든 유형을 아동학대라고 지각하였음에도 불구하고, 아동학대 신고의도에서는 요인별로 차이를 보였다. 구체적으로 신체적 학대와 방임에 대한 아동학대 신고의도는 남녀간 차이가 없었지만, 성적학대와 정서적 학대에서는 여성의 신고의도가 남성의 신고의도보다 강했다. 또한 아동학대 신고를 왜 해야 하는지와 관련된 고수준 해석을 할 때보다 아동학대를 어떻게 해야 하는지 관련된 저수준 해석을 할 때가 아동학대 신고의도가 강했다. 본 연구는 성별에 따라 공조점이 다른 아동학대 교육 콘텐츠 및 홍보물 제작, 아동학대 신고에 대한 저수준 해석을 적용한 교육에 시사점을 준다.

Study on rigid polyurethane foam composited with silica aerogel

고혜인,홍창국 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0

Silica aerogels are known as the mesoporous material with the high porosity and the low thermal conductivity. Rigid polyurethane foam is insulation material widely used due to its good mechanical strength and workability. In this study, the rigid polyurethane foam (PU foam) composited with silica aerogels were prepared by compositing method using homogenizer. The change of polyurethane foam with the content of silica aerogels was observed. Silica aerogels were prepared with IPA, HCl, TMCS and water glass via the sol-gel method. Silica aerogels dispersed polyol solution and MDI were used to prepare the polyurethane foams. The particle size and structure were analyzed by HR-TEM and FE-SEM, and the dispersivity of silica aerogels in PU foam were characterized with FE-SEM and EDS.

Improvement of Dispersion Stability of Silica Aerogels in Polyurethane Solution

고혜인,홍창국 한국공업화학회 2018 한국공업화학회 연구논문 초록집 Vol.2018 No.0

Silica aerogels are known as the mesoporous material with the high porosity and the low thermal conductivity. Silica aerogels were prepared with IPA, HCl, TMCS and water glass via the sol-gel method. In this study, the amount of TMCS used in the preparation of silica aerogels was controlled to improve the dispersivity of silica aerogels in polyurethane raw materials. The particle size and structure of Silica aerogels prepared by controlling the amount of TMCS were analyzed by FE-SEM and EDS. And the dispersion stability of silica aerogels in polyurethane solution were observed over time.