동작가동성이 향상된 작업복 하의 개발을 위한 시판 제품의 착용감 및 여유량 평가

이효정,엄란이,이예진,Lee, Hyojeong,Eom, Ran-i,Lee, Yejin 한국의류학회 2017 한국의류학회지 Vol.41 No.4

This study provides a size specification and ease for the development of pants for working clothes in the construction industry according to season. We collected and measured the size specification of 4 types of Spring/Fall pants, 4 types of winter brushed bonding pants, and 4 types of winter padded pants. Subjective comfort evaluation and analysis of ease sensation were performed for all products on 12 subjects. The average size specifications for the pants according to seasons were as follows. Spring/Fall pants had 74.0/80.0cm waist size (relaxed/maximum stretched) and 104.0cm hip size. Winter brushed bonding pants had 76.0/83.4cm for waist size and 106.0cm for hip size. Winter padded pants had 71.5/84.0cm for waist size and 112.8cm for hip size. When designing a pattern by comparing product size specification and subject body size, the recommended ease is 0.2/7.2cm for waist size (relaxed, maximum stretched) and 13.6cm for hip size for Spring/Fall pants, and 0.2/6.2cm for waist size and 11.6cm for hip size of winter brushed bonding pants, and -5.3/7.2cm for waist size and 19.4cm for the hip size of winter padded pants.

시판 3D Spacer Fabrics의 기능성 의복에의 적용 가능성 확인을 위한 물성평가

이효정,엄란이,이예진,Lee, Hyojeong,Eom, Ran-i,Lee, Yejin 한국섬유공학회 2017 한국섬유공학회지 Vol.54 No.4

In this study, the physical properties of commercially available 3D spacer fabrics are analyzed, and their applicability to functional apparel is investigated. Six samples were prepared by purchasing four types of 3D spacer fabric with different thicknesses and surface structures (A1, B1, C1, and D1). Moreover, A2 and B2 are produced by two layers of A1 and B1, respectively, and their applicability to functional apparel was examined through the evaluation of the tensile strength, elongation, air permeability, Q-max, and thermal insulation. In addition, based on these, 3D spacer fabric modeling for 3D printing was attempted. It was observed that the tensile strength was higher in the wale direction than in the course direction, and it increased with increasing thickness. The elongation was the highest in C1, with large surface holes and low density. The air permeability was also the highest in C1, with large holes and relatively high thickness. It was observed that the air permeability of A1 and B1 significantly decreased when they were two layered fabrics. With regard to the Q-max, C1 and D1, which were thick samples, exhibited high warm feeling, while A1 and B1, which were thin samples, exhibited high cold touch. Finally, the thermal insulation was the highest in D1, which was the thickest sample, demonstrating a positive correlation with thickness and volume. As a result, considering the advantageous properties of each sample and the related specific performance required for functional apparel obtained from the above results, it was confirmed that the 3D spacer fabric could be applied to functional apparel.

컴프레션 웨어용 경편성 스트레치 소재의 반복세탁이 치수, 의복압 및 신장 특성에 미치는 영향

이효정,이예진,Lee, Hyojeong,Lee, Yejin 한국섬유공학회 2017 한국섬유공학회지 Vol.54 No.5

This research was conducted to analyze changes in physical properties of stretch material for compression ware after repeated laundry and to provide implications regarding management of compression wear. Five types of warp knit most frequently used in market were collected. Basic physical properties of the materials were analyzed. Each material had its % stretch (stretchability) measured. Based on the information, cylinder type were produced by applying 56% and 76% pattern reduction rate as a test specimen. Laundry was repeated for 10, 20 and 30 times. Afterward, area and clothing pressure of the test specimens were measured. Also, rate of measurement change after laundry and changes in stretching properties before and after 30 times of laundry was measured. The result confirmed that the areas of test specimens tend to change not proportionate to rate of measurement change after laundry. Clothing pressure remained without noticeable changes after 10 or 20 times of laundry. But 30 times of laundry decreased clothing pressure of every material by 0.1-0.3 kPa and deteriorated stretch characteristics. It implied that functions of compression ware could be lost or changed by repeated laundry over certain times.

3차원 프린팅을 이용한 어린이용 무릎보호대의 분절형 하드쉘 설계

이효정,이예진,Lee, Hyojeong,Lee, Yejin 한국패션비즈니스학회 2017 패션 비즈니스 Vol.21 No.4

This study applied a segmented hard shell design on knee protectors for children with the objective of increasing mobility. The prototype of the hard shell that does not correspond to movement of the body among components of the knee protector was developed. Surface modeling was conducted based on 3D knee data to enhance comfort through optimized fit on the knee joint where the hard shell would be worn. For this, previous studies on changes in skin near the knee joint during knee flexion were reviewed to establish basic segmental lines. The basic design included six segments, and the number of segments was used as the design variable by increasing or decreasing it to 0, 3, 6, 9, and 14 segments. A prototype was produced from 3D printing with TPU material, worn for wearing assessment. Results revealed fewer numbers of segments resulting in less fit with the body, while actual appearance was stable. Meanwhile, the number of proper segments improved better fit with the body during movement. The wearing assessment revealed the amount of gap reflects change in skin length depending on movement. Assessment results demonstrated basic segment design, S6 with 6 segments, had the best design and most optimized fit. Findings in this study can provide key data for designing knee protection products for children.

참조패턴을 이용한 선반입의 개선 (pp.226-230)

이효정(Hyojeong Lee),도인환(In Hwan Doh),노삼혁(Sam H. Noh) 한국정보과학회 2008 정보과학회 컴퓨팅의 실제 논문지 Vol.14 No.2

선반입은 I/O 성능 향상을 위해 널리 사용되는 기법 중의 하나이다. 하지만 어떤 참조패턴에 대해서는 선반입을 수행하면 오히려 전체 수행시간이 증가하는 경우가 보고된 바 있다. 본 논문은 기존의 선반입 기법에 쉽게 적용될 수 있는 프레임 IPRP(Improving Prefetching Effects by Exploiting Reference Patterns)를 제안한다. IPRP는 참조패턴을 자동으로 탐지하고 기존의 선반입을 참조패턴의 특성에 따라 조정하여 개선하고자 한다. IPRP를 리눅스 미리 읽기 선반입에 적용한 성능평가에서 리눅스 미리 읽기 선반입이 수행시간을 40%~70% 정도 증가시키는 악영향을 발휘할 때 IPRP를 적용할 경우 악영향을 완전히 방지했다. 리눅스 미리 읽기 선반입이 성능 향상을 가져오는 경우에도 리눅스 미리 읽기와 유사한 성능을 가져 왔다. 이 결과를 통해 IPRP가 기존의 선반입을 효율적으로 보완 및 개선 할 수 있음을 알 수 있다. Prefetching is one of widely used techniques to improve performance of I/O. But it has been reported that prefetching can bring adverse result on some reference pattern. This paper proposes a prefetching frame that can be adopted on existing prefetching techniques simply. The frame called IPRP (Improving Prefetching Effects by Exploiting Reference Patterns) and detects reference patterns online and control prefetching upon the characteristics of the detected pattern. In our experiment, we adopted IPRP on Linux read-ahead prefetching. IPRP could prevent adverse result clearly when Linux read-ahead prefetching increases total execution time about 40~70%. When Linux read-ahead prefetching could bring some benefit, IPRP with read-ahead performed similar or slightly better benefit on execution time. With this result we could see our IPRP can complement and improve legacy prefetching techniques efficiently.

비크람 요가복의 최적화 디자인을 위한 주요 요인 추출

이효정(Hyojeong Lee),이예진(Yejin Lee) 한국생활과학회 2019 한국생활과학회 학술대회 Vol.2019 No.5

복잡계 네트워크 방법론을 활용한 상수관망의 위상학적 성능 평가 및 개선 – 네트워크 효율성을 중심으로

이효정(Hyojeong Lee),황성주(Seongju whang),박제량(Jeryang Park) 대한환경공학회 2022 대한환경공학회 학술발표논문집 Vol.2022 No.11

텍스타일 전극의 sEMG 데이터 신뢰도 향상을 위한 설계 조건 탐색

이효정(Hyojeong Lee),이예진(Yejin Lee) 대한인간공학회 2020 대한인간공학회 학술대회논문집 Vol.2020 No.10

학습자 평가에 기반을 둔 한국어 토론 수업의 비계설정(scaffolding)에 대한 연구

이효정(Lee Hyojeong) 학습자중심교과교육학회 2020 학습자중심교과교육연구 Vol.20 No.2

본 연구에서는 외국인 학습자를 위한 토론 수업을 진행할 때 도움을 줄 수 있는 적절한 도움 단계(비계)를 설정하기 위하여 외국인 전용 교양 선택 수업에서 진행한 토론 수업을 촬영 기록하고, 학습자에게 9차에 걸쳐 설문조사를 실시하였다. 토론 수업을 위해 제안한 비계설정은 다음과 같다. 첫째, 토론 수업을 성공적으로 진행하려면 ‘토론 주제에 대한 모범 글 제공, 토론의 순서 및 방법, 입안과 최종발언의 모범 예 제공, 개인 연습을 촬영한 동영상에 대한 피드백, 본격적인 토론 수업 전에 조 연습 진행’ 등의 과정이 필요하다. 둘째, 높은 현장에서의 순발력과 비판력이 요구되는 ‘반론’ 단계를 ‘반대 팀의 입론’ 단계로 수정할 것을 제안한다. 토론의 참여율을 높이고 학습자들의 자신감을 높이는 방안으로 전원 교차질의 단계를 활용하는 것도 비계설정에 포함될 수 있다. 셋째, 학습자들이 가장 어렵다고 평가하는 교차질의 단계를 수행하기 위해서는 토론 전에 상대팀의 근거를 추측하여 최대한 많은 질문을 준비하고 연습하는 과정이 필요하다. 교수자는 진행자의 역할을 맡아 중요한 발언을 정리하고 다음 단계로 넘어가는 역할을 수행하면서 교차질의를 해 나갈 수 있도록 학습자를 독려하여야 한다. 넷째, 입론과 최종발언의 경우에는 학습자들이 부담을 느끼는 현장 변동 가능성을 낮추고 모든 참여자의 이해를 높이기 위하여 보조 자료(파워포인트 등)를 준비하고, 이 단계에서 교수자가 피드백을 해 주는 것이 필요하다. The purpose of this study is to establish appropriate scaffolding to help foreign learners conduct discussion classes since well-planned discussions can have a positive effect on improving their communication skills. To this end, a discussion class was selected, filmed, and surveyed nine times. After analyzing the images and surveys, we propose scaffolding as follows. First, in order to successfully conduct the class, it is necessary to provide an example that the learner can refer to on the discussion topic, the order and method of the discussion, the oral and final remarks, and feedback on the video taken of the private practice, We need to clearly define scaffolding before we can apply it to classes. Second, the results suggest that the “rebut” stage, which requires a high level of immediacy and criticism, should be revised to apply to the “opponent team” stage. Using the power crossing query step to increase the learner’s confidence and participation rate can also be included in the scaffold setting. Third, in order to perform the cross-query step that learners regard as the most difficult, it is helpful to prepare as many questions as possible by guessing the grounds of the opponent team before the discussion and practicing cross-querying exercises before a serious discussion. The instructor should take the role of the facilitator and summarize the important remarks to encourage the learner to carry out the crossing inquiry while role-playing the next step. Fourth, for our final remarks, we propose scaffolding the teachers feedback and supporting materials (PowerPoint) on the manuscripts in order to lower the possibility of field fluctuation to increase the understanding of all participants.

네트워크 효율성과 회복탄력성 사이의 균형을 통한 상수도관망 최적 설계

이효정(Hyojeong Lee),박제량(Jeryang Park) 대한환경공학회 2021 대한환경공학회 학술발표논문집 Vol.2021 No.11