차량 내 디스플레이 위치에 따른 정보 및 기능에 대한 국가별 선호도 비교 연구

김영상 ( Kim¸ Youngsang ),유훈식 ( Yoo¸ Hoonsik ) 디자인융복합학회(구.한국인포디자인학회) 2021 디자인융복합연구 Vol.20 No.5

본 연구는 5개 국가 총 823명의 응답자(한국 160명, 미국 161명, 중국 164명, 러시아 167명, 브라질 171명)를 대상으로 5개 디스플레이(헤드업, 클러스터, 센터페시아, 보조석, 뒷좌석) 각각에 설치되길 원하는 4가지 기능(차량 주행 정보, 안전 정보, 편의 기능, 인공지능 비서)별 선호도를 비교 분석했다. 분석 결과에 따르면, 응답자들은 차량 주행 정보 및 안전 정보의 경우 헤드업이나 클러스터 디스플레이에서 표시되는 것을 선호하는 것으로 나타났다. 특히, 기술 수용도가 상대적으로 높은 중국과 브라질 응답자들은 이들 정보가 헤드업 디스플레이에 설치되는 것을 선호하는 반면 기술 수용도가 낮은 한국, 미국, 러시아는 클러스터 디스플레이를 선호하는 편이었다. 또한, 편의 기능 및 인공지능 비서 기능의 경우에는 센터페시아, 보조석, 뒷좌석이 설치되기에 적합하다는 응답이 많았으며 안전에 대한 인식이 비교적 관대한 중국 응답자들은 헤드업과 클러스터 디스플레이를 더 선호했다. This study analyzes a total of 823 respondents from 5 countries(Korea, USA, China, Brazil, and Russia)’s preference for 5 displays(head-up, cluster, center fascia, passenger seat, rear seat) assuming that each display had 4 functions(vehicle driving information, safety information, convenience functions, and artificial intelligence assistant). According to the results, respondents preferred that vehicle driving information and safety information be installed on the heads-up or cluster display. In particular, respondents from China and Brazil, which have relatively high technology acceptance, prefer that this information is installed on head-up displays, while Korea, the United States, and Russia, which have low technology acceptance, prefer cluster displays. In addition, in the case of convenience functions and artificial intelligence assistant functions, respondents from five countries answered that the center fascia, passenger seat, and rear seat were suitable for installation. In particular, Chinese respondents, who are relatively generous with their safety awareness, preferred the head-up and cluster display more.

Preparation of Antioxidant Film Consisting of By-product from Aronia Juice Processing

Youngsang CHUN,Hyeong Ryeol KIM,Kyung Rae KIM,Eun Jeong KIM,Hah Young YOO,Seung Wook KIM 한국생물공학회 2020 한국생물공학회 학술대회 Vol.2020 No.10

Enhancement of Enzyme Stability by Encapsulation of Lipase-copper-phosphate and Application to Biodiesel Conversion Process

Youngsang CHUN,Hyeong Ryeol KIM,Kyung Rae KIM,Eun Jeong KIM,Hah Young YOO,Ja Hyun LEE,Chulhwan PARK,Seung Wook KIM 한국생물공학회 2021 한국생물공학회 학술대회 Vol.2021 No.10

Lipase is well-known as a biocatalyst for the green process to produce biodiesel in charge of a sustainable environment. Enzyme immobilization is a strategy focusing on the application of continuous cycles in the enzymatic process system. In this study, an economical and simple immobilization technique was designed for repeated use of enzymes while stably maintaining enzyme activity through enzyme-metal-phosphate encapsulation. First, the evaluation of lipase activity on metal ions was carried out to determine the substance for encapsulation. As a result, the lipase activity showed the highest in Tris-HCl buffer containing copper ion. In particular, the self-assembled lipase-copper-phosphate (SALCP) in phosphate-buffered saline showed a highly porous and robust inorganic surface by SEM. Immobilized lipase through SALCP showed improved enzyme stability over a wide broad of pH and operating temperatures compared to free lipase. In addition, SALCP succeeded in maintaining more than 80% of lipase activity under the biodiesel conversion process for 10 cycles.

A Conceptual Model of Korean University EFL Learners’ Writing Performance

Youngsang Kim 경희대학교 언어정보연구소 2010 언어연구 Vol.27 No.3

This paper explored Korean university EFL students' writing performance and its model, using a qualitative research method. Several categories or themes emerged from in-depth interviews with current research respondents, which were perceived to impact students' EFL writing performance both inside and outside the university classroom. That is, results derived from the analysis of the data encompassed the following categories: (1) EFL learners' cognitive or metacognitive capacity; (2) EFL learners' overall English proficiency; (3) free voluntary reading in English; (4) free voluntary writing in English; and (5) EFL learners' writing apprehension and attitudes towards writing in English. Grounded in the categories above, a conceptual model of Korean university EFL learners' writing performance was eventually offered which could shed light on key components as perceived to have a bearing on writing performance in which Korean university EFL learners might engage themselves.

Micropatterning Silver Nanowire Networks on Cellulose Nanopaper for Transparent Paper Electronics

Kim, Dabum,Ko, Youngsang,Kwon, Goomin,Kim, Ung-Jin,You, Jungmok American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.44

<P>Transparent microelectrodes with high bendability are necessary to develop lightweight, small electronic devices that are highly portable. Here, we report a reliable fabrication method for transparent and highly bendable microelectrodes based on conductive silver nanowires (AgNWs) and 2,2,6,6-tetramethylpiperidine-1-oxy (TEMPO)-oxidized cellulose nanofibers (CNFs). The AgNW-based micropatterns were simply fabricated on glass via poly(ethylene glycol) photolithography and then completely transferred to transparent TEMPO-CNF nanopaper with high bendability via vacuum-assisted microcontact printing (μCP). The AgNW micropatterns were embedded in the surface layer of TEMPO-CNF nanopaper, enabling strong adhesion to the nanopaper substrate. The resulting AgNW micropatterns on the TEMPO-CNF nanopaper showed an optical transparency of 82% at 550 nm and a sheet resistance of 54 Ω/sq when the surface density of AgNWs was as low as 12.9 μg/cm<SUP>2</SUP>. They exhibited good adhesion stability and excellent bending durability. After 12 peeling test cycles and 60 s sonication time, the sheet resistance of the AgNW networks embedded on TEMPO-CNF nanopaper increased by only ∼0.12 and ∼0.07 times, respectively. Furthermore, no significant change in electrical resistance was observed even after 3 bending cycles to nearly 90° and 500 cycles of 80% bending strain. Moreover, the AgNW patterns on TEMPO-CNF paper were successfully applied for constructing a transparent electric circuit as well as a solid-state electrochromic device. Overall, we proposed an effective way to fabricate AgNW micropatterns on transparent nanopaper, which can be expanded to various conductive materials for high-performance paper-based electronics.</P> [FIG OMISSION]</BR>

Cognitive and Affective Preference of Visual Information Regarding Gender and Level of Resemblance of Human

Kim, Youngsang,Lee, Bong Gyou,Yoo, Hoonsik NADIA 2019 International Journal of Advanced Science and Tech Vol.124 No.-

Modeling of load transfer measured from smart tendon embedded ground anchors with finite difference method

Kim,Youngsang,Do, Tanmanh,Jung, Shinhyun 대한토목학회 2013 대한토목학회 학술대회 Vol.2013 No.10

A study was conducted to investigate the load transfer mechanism of ground anchors through a series of field experiments and numerical modeling. Optical FBG sensors, embedded into the center king cable of a 7-wire strand, were applied to the different ground conditions to monitor the distribution of tensile force along the tendons. The observed measurements of the in-situ load tests were compared with equivalent case studies simulated in the finite difference method, Flac 3D program. There is a good agreement between the experimental and numerical results. Both of them indicated that the tensile force remains constant at the free anchor length before dropping to zero at the distal end of the bonded anchor length. In addition, it is worth noting that the load transfer depth is different, short in hard rocks and longer in weak rocks depending on the ground conditions. This finding is particularly important when designing anchor and satisfying implicit economic criteria.

Teaching English Overseas : From EFL Instructors' Perspectives

Youngsang Kim 한국영어어문교육학회 2004 영어어문교육 Vol.10 No.3

Given the noteworthy increase in the number of native-born English-speaking EFL instructors teaching overseas, this research examined 6 American EFL instructors who had taught English abroad with Special reference to their experience as foreigner instructors in their respective host countries. With the use of interviews as the major technique employed, this research was centered on identifying conflicts or difficulties the research participants encountered as novice instructors, both internal and external to the classroom settings of their host countries. Research findings revealed that the current participants were not adequately prepared to cope with new and unfamiliar physical settings of their host countries, or to familiarize themselves with their new classroom settings and students. Studying the various the conflicts which native EFL instructors encountered, both internal and external to the classroom environment, will hopefully shed light on, and provide a more accurate portrayal of EFL professionals' teaching overseas and may provide possible insights into potential solutions to them. Furthermore, the research findings were considered and discussed in terms of acculturation theory.

A Facile Approach for Constructing Conductive Polymer Patterns for Application in Electrochromic Devices and Flexible Microelectrodes

Kim, Dabum,Kim, Jeonghun,Ko, Youngsang,Shim, Kyubin,Kim, Jung Ho,You, Jungmok American Chemical Society 2016 ACS APPLIED MATERIALS & INTERFACES Vol.8 No.48

<P>We developed a novel strategy for fabricating poly(3,4-ethylenedioxythiophene) (PEDOT) patterns on various substrates, including hydrogels, via sequential solution procedure without multistep chemical etching or lift-off processes. First, PEDOT nanothin films were prepared on a glass substrate by solution phase monomer casting and oxidative polymerization. As a second step, after UV-induced poly(ethylene glycol) (PEG) photolithography at the PEDOT/PEG interface through a photomask, the hydrogel was peeled away from the PEDOT-coated glass substrate to detach the UV-exposed PEDOT region, which left the UV nonexposed PEDOT region intact on the glass substrate, resulting in PEDOT patterns. In a final step, the PEDOT patterns were cleanly transferred from the glass to a flexible hydrogel substrate by a direct-transfer process based on a second round of gelation process. Using this strategy, PEDOT patterns glass or ITO film were used to successfully fabricate an electrochromic (EC) device that exhibited stable electrochromic switching as a function of applied potential. Furthermore, PEDOT patterns on hydrogel were used to fabricate all organic, flexible microelectrodes with good electrical properties and excellent mechanical flexibility. Importantly, the conductivity of PEDOT patterns on hydrogel (ca. 235 S cm(-1)) described here is significantly higher than that previously reported (ca. 20-70 S cm(-1)). This approach can be easily integrated into various technological fabrication steps for the development of next-generation bioelectronics systems.</P>

Role of spent coffee biomass for manufacturing well-interconnected porous PDMS 3D structure

Youngsang CHUN,Hyeong Ryeol KIM,Ju Hun LEE,Soo Kweon LEE,Hah Young YOO,Seung Wook KIM 한국생물공학회 2019 한국생물공학회 학술대회 Vol.2019 No.10