수소 압축기 내장형 충전 탱크의 벨로우즈 강도 성능 향상을 위한 형상 설계 파라미터 연구

김지형,송창용 한국산업융합학회 2024 한국산업융합학회 논문집 Vol.27 No.1

As the development of hydrogen vehicles has accelerated in recent years, it is necessary to develop a storage tank for hydrogen fueling stations capable of high- pressure charging, and for this purpose, a new system with a compressor-embedded refueling tank is required. In this study, the parametric study of shape design based on strength performance evaluation was carried out to find the optimal shape design of bellows, the core component of compressor-embedded refueling tank for a newly developed hydrogen refueling station capable of high-pressure charging above 1,000 bar. The design factors for parametric study were contour shape and radius of bellows, and the performance factors were the maximum stress and the gap distance in the contact direction. In the shape design of the compressor bellows for hydrogen refueling station considered in this study, it was found that adjusting the contour radius is an appropriate design method to improve the compression performance and structural safety.

모바일 MIMO OFDDM 시스템에서 채널의 상관성을 이용한 효율적인 채널 추정 기법

김지형,박병준,홍대식,강창언 한국통신학회 2004 韓國通信學會論文誌 Vol.29 No.4

유자녀 부부와 무자녀 부부 사이의 출산에 영향을 미치는 요인의 차이

김지형,김현철 한국국제경제학회 2022 국제경제연구 Vol.28 No.1

This paper examines the determinants of fertility rates in Korea by birth order using the data collected by the National Survey of Tax and Benefit through 2007-2019. We divide the sample into three groups depending on the birth order of the next child. The model of childbirth decisions is estimated using the panel logit model with household fixed effects. Our finding indicates that the determinants of childbirth for women without a child differs from those for women who already have a child or more. We find the childbirth of women with no child to be affected by mom’s hours worked, parents’ age, the ownership of house, and the expenditure on tobacco products and beauty/hair services before childbirth. We also find that the decision to give birth to a second child is affected by the type and size of residence. The childbirth of a third or higher-order child is barely related with these factors. Our results suggest that the policies of promoting childbirth take into account the order of birth. 본 연구는 2007~2019년 기간의 재정패널 자료를 이용하여 출산 순위별로 출산율에 영향을 미치는 요인을 분석하였다. 종속 변수를 무자녀 집단, 한 자녀 집단, 두 자녀 집단으로 나누어 패널로짓모형을 사용해 독립변수와의 관계를 살펴보았다. 분석 결과에 따르면 무자녀 부부와 유자녀 부부 간에 출산에 영향을 미치는 요소가 다른 것으로 나타났다. 무자녀 집단은 첫째 자녀 출산을 고려할 때 부모의 나이, 엄마의 노동시간, 주거 주택이 자가인지 전세인지, 무자녀 상태일 때의 담배․이미용 소비성향 등이 출산과 밀접한 관계가 있는 것으로 나타났다. 반면, 한 자녀 집단이 둘째 출산을 고려할 때에는 거주하는 주택이 어떤 형태인지와 주택의 크기가 주요한 영향을 미치는 것으로 나타났다. 또한 셋째 이상의 자녀 출산을 결정할 때에는 첫째 및 둘째 자녀의 출산에 영향을 미치는 대부분의 변수들이 유의미하지 않은 것으로 나타났다. 이러한 결과는 정부의 출산장려 정책 시행에 있어 새로운 관점을 제시할 수 있다는 점에서 의의가 있다

유아기 애착과 사회적 적응과의 관계

김지형,K.A.S.Wickrama 한국아동학회 2018 한국아동학회 학술발표논문집 Vol.2018 No.11

심계질환(心系疾患)을 중심으로 한 상한론(傷寒論)의 부자(附子) 활용(活用)

김지형,이원철,Kim, Ji-Hyoung,Lee, Won-Chul 대한한방내과학회 1999 大韓韓方內科學會誌 Vol.20 No.1

The aim of the study was the application of Radix Aconiti(附子) in the treatment of heart-systemic disease(心系疾患). We inquired into the prescriptions with Radix Aconiti (附子) in the treatment of heart-systemic disease(心系疾患) in many other aspects through 'Sanghanron'(傷寒論). The results were obtained as follows; The prescriptions with Radix Aconiti(附子) form about 18%, it's related text forms about 11%. Radix Aconiti(附子) was used with other 20 kinds of herbs in 7 categories-hyepyo(解表), jesp(除濕), selyul(泄熱), hwagihyengsu(化氣行水), onjungsanhan(溫中散寒), ikum(益陰), anhejitong(安蛔止痛). Among these herbs, the combination with Zingiver officinale Roscoe(乾薑) is focal usage, because the combination was used in 8 prescriptions out of 20. A fresh Radix Aconiti(附子) which was used with Zingiver officinale Roscoe(乾薑) is efficacious against poison of Radix Aconiti(附子). When this combination was used, it had been boiled for a long time in most cases, it is also helpful of counteracting poison. A Steamed Radix Aconiti(附子) was used with Zingiver officinale Roscoe (生薑). In the special feature of dosage of Radix Aconiti(附子), it was considerately used in many different conditions which includes strength or weakness of patients, and the critical or slight condition of illness. In the taking frequency and dosage of the medicine, it was applied the same. There are 2 methods of boiling, one is boiling separately from other herbs and the other is boiling all together. When boiling seperately, it works more quikly and strongly. In the case of severe 'rehan'(裏寒) which refuses warmed medicine, it was used with 2 other herbs(猪膽汁, 人尿) that take down from yang(陽) to ying(陰). The foci of prescriptions that contain Radix Aconiti(附子) is the type of Sayektang(四逆湯類), because Gungangbujatang(乾薑附子湯) does the important work in the prescriptions. The paradigm of Radix Aconiti(附子) treated palpitation, edema, diziness, confusion, numbness, iced limbs in the treatment of heart-systemic disease(心系疾患). In the usage of Radix Aconiti(附子), the above results need to be referred and further clinical studies will be necessary.

패션 공유 어플리케이션의 사용자 경험이 수용에 미치는 영향 연구: UTAUT 모형을 중심으로

김지형 한국콘텐츠학회 2019 한국콘텐츠학회논문지 Vol.19 No.5

Fashion cannot encourage co-consumption with other people as a personal item, but it can lead to new consumer needs if fashion sharing service can professionally replace the time and cost of purchasing and managing goods. The purpose of this study is to empirically investigate the factors influencing the acceptance of fashion-sharing services based on the integration theory of user acceptance and utilization (UTAUT), and to discuss the virtuous cycle and sustainability pursuit of resources through the activation of the sharing. In this study, the research model for the acceptance of fashion sharing applications is schematized, and the survey was conducted 300 women aged 20~49 years. The screens of 'Project Anne', a representative fashion sharing service in Korea, were provided as a visual data. Reliability analysis, correlation analysis, confirmatory factor analysis, structural equation analysis, and multiple group analysis were performed using SPSS 23.0 and AMOS 22.0 statistical package for statistical analysis. As a result, efficiency and social influence positively influenced behavioral intention to use, and age has found that efficiency and social influences modulate the intensity of behavioral intention to use. Therefore, for the consumer acceptance and activation of fashion sharing services, marketing activities emphasizing efficiency and strengthening social influence factors are essential. Also, it is necessary to maintain the existing target group, 30~40s, and also construct additional products and price services for the 20s. This study is of academic significance in presenting basic data for empirical research on consumer acceptance of fashion sharing, and suggests a study on the influence relationship among user experience components for real users in the future. 패션은 개인적인 물품으로 타인과 함께 협력 소비하는 것을 권장하기에는 한계점이 있으나, 패션 공유 서비스가 상품 구입과 관리에 소요되는 시간과 비용을 전문적으로 대체할 수 있다면 새로운 소비자 니즈로 이어질 수 있다. 본 연구의 목적은 통합기술수용이론(UTAUT) 기반으로 사용자 경험 구성요인들이 패션 공유경제 서비스 수용에 미치는 영향 요인을 실증적으로 밝히고, 공유 경제 활성화를 통한 자원의 선순환 및 지속가능성 추구에 대한 논의에 기여하는 것이다. 이에 본 연구는 패션 공유경제 어플리케이션 수용에 관한 연구 모형을 도식화하였으며, 국내 대표 패션 공유경제 서비스인 '프로젝트앤'의 어플리케이션 화면을 시각 자료로서 활용하여 20~49세 여성 300명을 대상으로 설문조사를 실시하였다. 통계분석을 위해 SPSS 23.0과 AMOS 22.0 통계 패키지를 이용하여 신뢰도 분석, 상관관계 분석, 확인적 요인분석, 구조방정식분석, 다중집단분석을 실시하였다. 분석 결과, 패션 공유경제 서비스의 사용효율성, 사회적영향은 이용의도에 긍정적인 영향을 주며, 연령의 조절효과는 유의한 것으로 확인되었다. 이는 패션 공유 서비스가 의생활의 편리에 기여하는 사용효율성 측면과 주변 사람들의 참여와 독려를 통한 사회적영향 측면의 마케팅 활동을 통해 활성화될 가능성을 제시하고 있으며, 기존 타겟층인 30~40대와 더불어 20대 소비자를 위한 상품 구성 및 가격 서비스 도입을 제안할 수 있겠다. 본 연구는 패션 공유의 소비자 수용에 관헌 실증적 연구를 위한 기초 자료를 제시함에 학술적 의의가 있으며, 향후 실제 사용자들을 대상으로 사용자경험 구성요소 사이의 영향 관계 분석 연구를 제안하는 바이다.

語彙의 化石化와 語源 硏究

김지형 한국어의미학회 2002 한국어 의미학 Vol.11 No.-

Kim Ji-hyung. 2002. A Study on Fossilization of Vocabulary and Etymology. Korea Semantics, 11. It takes a long time for a word to be fossilized. Therefore, it is not easy to categorize the aspects of word fossilization into a few categories. In addition, it is more difficult to categorize the aspects of word fossilization than to categorize other linguistic units because a type of lexical change is too complicated.To find out a presumed fossilized form of an archaic word and to make it clear the origin of linguistic elements, it should be based on the etymological study. Based on this etymological study, we will be able to understand the general diachronic changes of the lexical system of Korean language. And then, we could further explain the synchronous lexical system.This study tried to find out the interrelationship between the diachronic changes and synchronic lexical system of Korean language. More accurate and systematic study need to be done in the future. Through these studies, we can overcome one obstacle so-called “insufficiency of materials” of Korean studies.

삼차신경통(三叉神經痛) 환자 1례(例)에 대한 증례보고(證例報告)

김지형,정승현,신길조,이원철,조규선,Kim, Ji-Hyoung,Chung, Seung-Hyun,Shin, Gil-Jo,Lee, Won-Chul,Cho, Gyu-Seon 대한한방내과학회 2000 大韓韓方內科學會誌 Vol.21 No.3

In the treatment of trigeminal neuralgia, it is known that the operative mothods, such as neurovascular decompression, rhizotomy etc. are the most effectious therapies on its pain control. But, due to some side effects and complication, the healing by the first intention of trigeminal neuralgia has been the pharmacotherapy. The cabamazepine is the most common agent, but it is not often effectious in some cases, and attenuated as time goes, engaged in some symptoms, such as dizziness, nausea, vomit, etc., and caused in aplastic anemia, thus it has much deficacies in being the first intention. Recently we have experienced a 77-year old woman who had suffered from the severe trigeminal neuralgia for 21 years, and her condition and pain control were improved through the Korean medical treatments, so we report it for the better treatment.

대학 신입생의 수능 필수 '한국사' 경험과 '사고와표현' 교육의 상관성

김지형 한국사고와표현학회 2018 사고와표현 Vol.11 No.3

This is a case study to understand and overcome the meaning and reality of university liberal arts education in the extension of high school education. This article focuses on the universal liberal arts education, especially the changing conditions of Thinking and Expression courses for the generations who have experienced Korean history subjects. Since the 2017 school year, Korean history has not been a test to evaluate historical awareness, but it has become a very easy subject to measure only simple historical facts. It is also recognized as a passing subject that does not directly affect college entrance examination. These facts make it difficult to expect the result of the expansion of historical awareness through the subjects of Korean history. Therefore, in the case of Thinking and Expression, which is the main subject of liberal arts education in universities,education based on traditional historical awareness. It is necessary to urgently search for direction and methodology of Thinking and Expression education in order to prepare for the change in the context of establishing integrated education system of liberal arts-natural sciences and fusion-convergence education in high school. 고등학교 교육의 연장선에서 대학 교양교육의 의미와 현실을 이해하고 극복하기 위한 사례 분석 연구이다. 이 글은 수능 필수 한국사를 경험한 세대를 대상으로 대학에서 교양교육 특히 ‘사고와 표현’을 실시해야 하는 변화된 여건에 주목하였다. 2017학년도부터 시행된 수능 필수 한국사는 역사인식과 관련된 사고력을평가하는 고도의 인문학을 지향하지 못한 채 간단한 역사적 사실만을 측정하는‘쉬운’ 한국사 과목이 되고 말았다. 또한 대학 입시에 직접적인 영향을 주지 못하는 과목으로서 고등학생들에게 ‘패싱 과목’으로 인식되고 있다. 이같은 현실은 한국사 과목을 매개로 한 역사인식의 확장을 기대하기 어려운 조건으로 작용하고있다. 따라서 대학 교양교육의 중심인 ‘사고와 표현’ 과목의 경우, 전통적인 역사인식 기반의 읽기, 쓰기, 말하기 교육에 근본적 장애가 조성되고 있는 상황을 고려해야할 뿐만 아니라 고교의 문⋅이과 통합교육 체계와 융⋅복합 교육이 추진되고 있는 상황에서 이에 대비한 대학의 ‘사고와 표현’ 교육 방향과 방법론을 시급히 모색할 필요가 있다는 점을 강조하였다.

어머니 취업과 우울, 모유수유 기간과 유아기 체질량지수 궤적과의 관계

김지형 한국모자보건학회 2020 한국모자보건학회지 Vol.24 No.2

Purpose: The present study aimed to examine the longitudinal associations among maternal employment, breastfeeding duration, and body mass index (BMI) trajectories in early childhood. Drawing from the process model of the determinants of parenting, this study particularly focused on the mediating role of depressive symptoms in these links. Methods: This study analyzed the data of 2,059 mothers and their children from the panel study on Korean children. A latent growth curve analysis was conducted to investigate the paths linking maternal employment to BMI trajectories during the preschool years. Results: Maternal employment was associated with low levels of depressive symptoms, which in turn predicted a longer duration of breastfeeding. Second, maternal employment had direct adverse effects on the breastfeeding duration. We also found that longer duration of breastfeeding contributed to the low levels of BMI in early childhood. Conclusion: The findings highlight the importance of maternal mental health and breastfeeding duration to prevent obesity in early childhood. Moreover, the results suggest that a distinct approach for working and stay-at-home mothers needs to be considered for the promotion of breastfeeding.