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Jung, Byungwook,Lee, Youngmin 한국문화산업학회 2021 문화산업연구 Vol.21 No.2
As the seriousness of the pollution issues, causing serious threats to animals and plants, as well as human beings and earth as a whole, are being more exposed, consumers" interest in environmental preservation is increasing. With it, the size of the domestic waste recycling market is steadily growing. This study focuses on the upcycling product, which is produced by adding new value to waste products and transforms them into a different product with new usability. Whereas the companies that produce upcycle products and the categories of upcycle products are gradually increasing, this study is conducted to test what consumption value consumers perceive when observing upcycle products, and how it affects their purchase intention and recommendation intention. Upon analyzing the survey that was conducted to consumers that have previously purchased upcycling products, of the perceived consumption values: functional value, social value, environmental value, and self-expression value, three values excluding the social value had shown a significant effect on purchase intention and recommendation intention. Consumer innovativeness showed a moderating effect on the functional value, self-expression value, and purchase intention, but did not show a moderating effect on recommendation intention.
정병욱(Byungwook Jung),천성표(Seungpyo Cheun),김연태(Yountae Kim),김성신(Sungshin Kim) 한국지능시스템학회 2008 한국지능시스템학회논문지 Vol.18 No.4
휴먼인터페이스 기술의 발달에서 인간과 기계의 상호작용은 중요한 부분이다. 감정인식에 대한 연구는 이러한 상호작용에 도움을 준다. 본 연구는 개인화된 음성신호에 대하여 감정인식 알고리즘을 제안하였다. 감정인식을 위하여 PLP 분석을 이용하여 음성신호의 특징으로 사용하였다. 처음에 PLP 분석은 음성인식에서 음성신호의 화자 종속적인 성분을 제거하기 위하여 사용되었으나 이후 화자인식을 위한 연구에서 PLP 분석이 화자의 특징 추출을 위해 효과적임을 설명하고 있다. 그래서 본 논문은 PLP 분석으로 만들어진 개인화된 감정 패턴을 이용하여 쉽게 실시간으로 음성신호로부터 감정을 평가하는 알고리즘을 제안하였다. 그 결과 최대 90%이상의 인식률과 평균 75%의 인식률을 보였다. 이 시스템은 간단하지만 효율적이다. In the field of development of human interface technology, the interactions between human and machine are important. The research on emotion recognition helps these interactions. This paper presents an algorithm for emotion recognition based on personalized speech signals. The proposed approach is trying to extract the characteristic of speech signal for emotion recognition using PLP (perceptual linear prediction) analysis. The PLP analysis technique was originally designed to suppress speaker dependent components in features used for automatic speech recognition, but later experiments demonstrated the efficiency of their use for speaker recognition tasks. So this paper proposed an algorithm that can easily evaluate the personal emotion from speech signals in real time using personalized emotion patterns that are made by PLP analysis. The experimental results show that the maximum recognition rate for the speaker dependant system is above 90%, whereas the average recognition rate is 75%. The proposed system has a simple structure and but efficient to be used in real time.
Kim Byungwook,황세정,Heo Eunjeong,Kim Hyung-sook,Jung Jongtak,Kim Eu Suk,김홍빈,Lee Kyunghoon,Park Jeong Su,송정한,Lee Joon Hee,Chung Jae-Yong,Song Kyoung-Ho,Yoon Seonghae 대한의학회 2023 Journal of Korean medical science Vol.38 No.14
The current guidelines for therapeutic drug monitoring (TDM) of vancomycin suggest a target 24-hour area under the curve (AUC0-24) of 400 to 600 mg*h/L for serious methicillinresistant Staphylococcus aureus infections. In this study, the predictabilities of acute kidney injury (AKI) of various TDM target parameters, target levels, and sampling methods were evaluated in patients who underwent TDM from January 2020 to December 2020. The AUC0-24 and trough values were calculated by both one- and two-point sampling methods, and were evaluated for the predictability of AKI. Among the AUC0-24 cutoff comparisons, the threshold value of 500 mg*h/L in the two sampling methods was statistically significant (P = 0.042) when evaluated for the predictability of AKI. Analysis by an receiver operating characteristic curve estimated an AUC0-24 cutoff value of 563.45 mg*h/L as a predictor of AKI, and was proposed as the upper limit of TDM target.
도전성이 높은 안정화층을 고려한 YBCO 선재의 전송전류 손실 해석
강명훈(Myunghun Kang),한병욱(Byungwook Han),정두영(Duyoung Jung),임희현(Heehyun Lim),임형우(Hyoungwoo Lim),차귀수(Gueesoo Cha),이희준(Heejoon Lee) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
YBCO wire has a metal substrate to improve the texture structure and highly conductive layers to increase the cryogenic stability. When AC current flows in the YBCO wire, magnetic field which is generated by the AC current magnetizes the metal substrate and induces the eddy current in the stabilizing layer. To examine the effect of the metal substrate and the conducting layer on the transport current loss of YBCO wire, this paper presents the transport current loss of YBCO wire which has metal substrate and conductive layer. YBCO wire with Nj-W substrate and copper layer were chosen as the model HTS wire for numerical calculation. Finite element method has been used to calculate the transport loss and the results of numerical calculation was compared with analytic calculation suggested by Norris.
Hyun-Su Lim,Jung-Min Oh,Byungwook Yoo,Chul Jong Han,Jong-Woong Kim 대한금속·재료학회 2021 ELECTRONIC MATERIALS LETTERS Vol.17 No.5
A self-healable and stretchable light-emitting device with high emission characteristics was developed. To this end, a reversiblycrosslinkable polyurethane (rcPU) was synthesized, and ZnS:Cu microparticles were dispersed therein to form an alternatingcurrent-driven electroluminescent (EL) film. Transparent electrodes were formed on both surfaces of the EL film forvoltage application by using Ag nanowires, which were impregnated under the polymer surface by inverted layer processingand vaporized solvent-assisted embedding method. The developed device exhibited an exceptionally high maximum emissionintensity of almost 500 cd/m2. In addition, the device maintained its homogeneous emission characteristics even afterthe application of 100% uniaxial strain with a luminance degradation of less than 40%. Due to the reversible crosslinkingcharacteristics of the rcPU, the device could be recombined even after being completely cut, and the emission propertiesbefore cutting could be restored.
IoT 환경에서 안전한 통신을 위한 세션 키 기반 접근 제어 기법의 설계 및 평가
진병욱,정동욱,차시호,전문석,Jin, Byungwook,Jung, Dongwoog,Cha, Siho,Jun, Moonseog 디지털산업정보학회 2016 디지털산업정보학회논문지 Vol.12 No.1
Internet of Things (IoT) services are widely used in appliances of daily life and industries. IoT services also provide various conveniences to users and are expected to affect value added of all industries and national competitiveness. However, a variety of security threats are increased in IoT environments and lowers reliability of IoT devices and services that make some obstacles for commercialization. The attacks arising in IoT environments are making industrial and normal life accidents unlike existing information leak and monetary damages, and can expand damage scale of leakage of personal information and privacy more than existing them. To solve these problems, we design a session key based access control scheme for secure communications in IoT environments. The proposed scheme reinforces message security by generating session key between device and access control network system. We analyzed the stability of the proposed access scheme in terms of data forgery and corruption, unauthorized access, information disclosure, privacy violations, and denial of service attacks. And we also evaluated the proposed scheme in terms of permission settings, privacy indemnity, data confidentiality and integrity, authentication, and access control.