'크라우드소싱'(crowdsourcing) 활용방법과 카카오톡 기반 문진챗봇을 통한 크라우드소싱 방법의 설문 구축 사례연구

유승호,유지호,김대영,윤인재,Yu, Seung-Ho,Yu, Ji-Ho,Kim, Dae-Yeong,Yun, In-Jae 한국정보처리학회 2022 정보처리학회지 Vol.29 No.1

테입캐스팅을 이용한 대면적 (100 cm²) 연료극 지지체식 평판형 고체산화물 연료전지의 개발

유승호,송근숙,손희정,김종희,송락현,정두환,백동현,신동열,Yu, Seung-Ho,Song, Keun-Suk,Song, Hee-Jung,Kim, Jong-Hee,Song, Rak-Hyun,Jung, Doo-Hwan,Peck, Dong-Hyun,Shin, Dong-Ryul 한국전기화학회 2003 한국전기화학회지 Vol.6 No.1

본 연구에서는 중저온에서 작동되는 연료극 지지체식 평판형 연료전지를 연구하였으며, 저가의 공정인 테입케스팅법을 이용하여 $0.8\~1mn$의 두께와 $25,\; 100,\;150cm^2$크기의 평판형 연료극 지지체를 제작하였고, 연료극 지지체의 특성을 확인하기 위해서 기공률, 가스 투과율 그리고 전기전도도 등을 측정하였다. $12wt.\%$의 결합제를 사용하여 제작된 지지체의 기공률은 $45.8\%$이고 환원 시 $53.9\%$로 증가함을 보였다. 연료극 지지체는 $850^{\circ}C$에서 900S/cm의 높은 전기전도도를 나타내었으며, 1기압 하에서 공기로 측정하였을 때 6l/min의 기체투과량을 보였다. 단전지의 제조는 테잎케스팅 법으로 제조된 연료극 지지체위에 슬러리 디핑 코팅법을 이용하여 전해질과 공기극을 순차적으로 제조하였다. YSZ의 농도를 $10wt.\%\;와\;20wt.\%$로 하여 제조된 전해질의 두께는 각각 form와 300m이었고, 공기극은 LSM-YSZ/LSM/LSCF의 다층 구조로 구성되었다. $10{\mu}m$두께의 전해질은 매우 치밀하였고 3기압 하에서 가스 투과도는 2.5ml/min을 나타내었다. 단전지의 성능 시험에서 $20\~30{\mu}m$두께의 전해질을 갖는 연료극 지지체식 평판형 연료전지는 $750^{\circ}C$에서 0.6V, $300 mA/cm^2$성능을 보였다. For the development of low temperature anode-supported planar solid oxide fuel cell, the planar anode supports with the thickness of 0.8 to 1 mm and the area of 25, 100 and $150\;cm^2$ were fabricated by the tape casting method. The strength, porosity, gas permeability and electrical conductivity of the planar anode support were measured. The porosity of anode supports sintered at $1400^{\circ}C$ and then reduced in$H_2$ atmosphere was increased from $45.8\%\;to\;53.9\%$. The electrical conductivity of the anode support was $900 S/cm\;at\; 850^{\circ}C$ and its gas permeability was 6l/min at 1 atm in air atmosphere. The electrolyte layer and cathode layer were fabricated by slurry dip coating method and then had examined the thickness of $10{\mu}m$ and the gas permeability of 2.5 ml/min at 3 atm in air atmosphere. As preliminary experiment, cathode multi-layered structure consists of LSM-YSZ/LSM/LSCF. At single cell test using the electrolyte layer with thickness of 20 to $30{\mu}m$, we achieved $300\;mA/cm^2$ and 0.6V at $750^{\circ}C$

뫼비우스 증후군 - 발병기전, 임상양상, 진단 및 치료 -

유승호,Seung Ho Yu 대한융합한의학회 2021 대한융합한의학회지 Vol.1 No.1

Objectives: To review the concept of Moebius syndrome. Methods: Literature search was done to study definition, epidemiology, pathophysiology, clinical feature, and treatment of Moebius syndrome. Pubmed, RISS, Google scholarship and uptodate scholastic were used in the research. Search words were 'Moebius syndrome', 'treatment of Moebius syndrome'. Only English and Korean studies were assessed. Results: Moebius syndrome is rare disease characterized by nonprogressive congenital uni- or bi-lateral facial (VII cranial nerve) and abducens (VI cranial nerve) palsy. This facial palsy is found across the world, and its incidence is approximately 1 per 250,000. Moebius is diagnosed by clinical features. Facial palsy, eye abduction problem, limb deformities, global cerebral nerve impairment can be shown. Rehabilitation, smile surgery, and acupuncture can be used to treat this. Conclusion: Moebius syndrome's epidemiology, pathogenesis, treatment is still not fully revealed. It is known to be a congenital disease which didn't have exact treatment except surgery. But, it needs further study about exact treatment, diagnosis, and pathogenesis.

출판저널칼럼

유승호,Yu, Seung-Ho 대한출판문화협회 2000 출판저널 Vol.290 No.-

전자빔 공정에서 실험계획법을 이용한 살균제 Benomyl의 제거특성 및 독성평가

유승호(Seung Ho Yu),조일형(Il Hyoung Cho),장순웅(Soon Woong Chang),이시진(Si Jin Lee),천석영(Suk Young Chun),김한래(Han Lae Kim) 大韓環境工學會 2008 대한환경공학회지 Vol.30 No.9

본 연구는 전자빔 공정에서 실험계획법(design of experiment: DOE) 중 일반요인배치법(general factorial design)을 이용하여 2개 인자(X1: benomyl concentration(mg/L), X2: E-beam irradiation(Gy))를 토대로 요인(X1: benomyl concentration) 1에서 3개 수준(3 level: 0.5, 1 및 1.5 mg/L)와 요인(X2: E-beam irradiation) 2에서 6개 수준(6 level: 100, 800, 600, 400, 200 및 100 Gy)으로 구성된 3블록(block) 실험조합에 따라 Benomyl의 분해(Y1: the % of decomposition), 무기화(Y2: the % of materialization) 및 독성평가(acute toxicity assessment)를 수행하였다. 우선 HPCL 분석에 의한 Benomyl에 분해특성은 처리조합(treatment combination) 3 블록(block)의 17 및 18번을 제외한 모든 실험조건에서 100% 분해되었고 등분산(equal variance) 조건에서 일원분산분석(one-way ANOVA)결과 수준 간 유의한 차이가 없었다(p>0.05). 전자빔 조사에 의한 Benomyl에 무기화(materialization) 특성은 각 3개의 처리조합에서 평균 46%, 36.7% 및 22%의 제거효율을 나타났고 각 조합에서 처리수준 간 예측식은 block 1(Y1=0.024X1+34.1(R2=0.929)), block 2(Y2=0.026X2+23.1(R2=0.976)) 및 block 3(Y3=0.034X³⁺6.2(R2=0.98)) 등의 1차 선형 회귀식을 만족하였다. 또한 Benomyl에 무기화(materialization)에 대한 Anderson-Darling 검정을 이용한 정규성(normality)을 만족하였다(p>0.05). 또한 무기화에 대한 반응에 대한 선형 및 비선형을 포함한 다중회귀분석(multi regression analysis)을 도출한 결과 다음과 같은 예측식 Y=39.96-9.36X1+0.03X2-10.67X1 2-0.001X2 2+0.011X1X2(R2=96.3%, Adjusted R2=94.8%)을 도출하였다. 2가지 반응변수(X1: benomyl concentration(mg/L), X2: E-beam irradiation(Gy))에 의한 2차 반응표면 모형식 추정으로부터 정준분석을 통해 최적조건을 도출한 결과 Benomyl 초기농도(X1) 0.55 mg/L, 전자빔 조사량 950 Gy에서 TOC 제거율 57.3%으로 나타났다. 마지막으로 V. fischeri를 이용한 Microtox(TM) modified 81.9% test을 이용하여 전자빔에 의한 Benomyl에 대한 급성 독성을 평가한 결과 전자빔 조사전 block 1의 0.5 mg/L에서 10.25%, block 2의 1 mg/L에서 20.14% 및 block 3의 1.5 mg/L에서 26.2%의 생물학적 방해(inhibition)작용이 발생하였으나 전자빔 조사 후 모든 조건에서 생물학적 방해영향을 나타나지 않았다. We investigated and estimated at the characteristics of decomposition and mineralization of benomyl using a design of experiment(DOE) based on the general factorial design in an E-beam process, and also the main factors(variables) with benomyl concentration(X1) and E-beam irradiation(X2) which consisted of 5 levels in each factor was set up to estimate the prediction model and the optimization conditions. At frist, the benomyl in all treatment combinations except 17 and 18 trials was almost degraded and the difference in the decomposition of benomyl in the 3 blocks was not significant(p>0.05, one-way ANOVA). However, the % of benomyl mineralization was 46%(block 1), 36.7%(block 2) and 22%(block 3) and showed the significant difference of the % that between each block(p<0.05). The linear regression equations of benomyl mineralization in each block were also estimated as followed; block 1(Y1=0.024X1+34.1(R2=0.929)), block 2(Y2=0.026X2+23.1(R2=0.976)) and block 3(Y3=0.034X³⁺6.2(R2=0.98)). The normality of benomyl mineralization obtained from Anderson-Darling test in all treatment conditions was satisfied(p>0.05). The results of prediction model and optimization point using the canonical analysis in order to obtain the optimal operation conditions were Y=39.96-9.36X1+0.03X2-10.67X1 2-0.001X2 2+0.011X1X2(R2=96.3%, Adjusted R2=94.8%) and 57.3% at 0.55 mg/L and 950 Gy, respectively. A Microtox test using V. fischeri showed that the toxicity, expressed as the inhibition(%), was reduced almost completely after an E-beam irradiation, whereas the inhibition(%) for 0.5 mg/L, 1 mg/L and 1.5 mg/L was 10.25%, 20.14% and 26.2% in the initial reactions in the absence of an E-beam illumination.

Fundamental Understanding and Engineering Design of Electrode Materials for Rechargeable Batteries

Seung-Ho Yu(유승호) 한국고분자학회 2023 한국고분자학회 학술대회 연구논문 초록집 Vol.48 No.2

TCE Reductive Dechlorination Using Silicon-Based Compounds as Slow-Release Anaerobic Substrates

유승호(Seung Ho Yu),Lewis Semprini 대한환경공학회 2005 대한환경공학회 학술발표논문집 Vol.2005 No.12

해외 골프관광의 지각된 가치와 행동의도 간의 인과관계

유승호(Seung Ho Yu),박현권(Hyeon Kwon Park),이혁기(Hyuck Gi Lee) 한국사회체육학회 2014 한국사회체육학회지 Vol.0 No.56

Recently, sport tourism has been one of the most attractive industries to the public regardless of language, race, and culture, on the strength of development of communicative means. Among various sports industry, golf has caught public attention. Golf is said to be the favoured sport in that we can play in grassy grassland full of fresh air out of the center of the city. Besides, Korean professional golfers have been extending their golf career abroad, thus, golf has gained in popularity over recent years. Golf used to be a symbol of fancy sport only for the upper class. Recently, however, everyone, regardless of gender and income level, is enjoying golf. Golf is an active sport, in that everyone can easily participate in enjoying the fresh air with relaxation. So far, research relating to golf has focused on the point of present condition, motivation, how to expand the golf industry, satisfaction, revisiting the playground, and business administration. Especially business administration aspect has been considered significantly important. Furthermore, the perspective of social psychology is the core point in comprehending the golf industry. For instance, we face psychological problems, the financial problem, and the lack of time. These elements have influence on taking part in golf. Hence, to encourage the interest of golf, it is crucial to solve these hindrances. This research closely examined the relation of perceived value and behavioral intention of overseas golf tourists’ sports club and verified the moderator effect of leisure. For this, data was collected from 211 golfers who have been abroad for golf tour. Simple regression and hierarchical regression analysis were performed to analyze the collected data using SPSS 18.0 program. The following are the results form of the study. First, perceived value had significant effect on behavioral intention of overseas golf tourists. Second, controlling leisure moderator effect had partial significant effect on their behavior. In particularly, between perceived value generated by overseas golf and behavioral intention exists a causal relationship. The interpersonal effect of the activity had moderator effect, and interpersonal and structural constraints had no moderator effect.

설계경기 - 홈앤쇼핑 신사옥

박도권,유승호,Park, Do-Gwon,Yu, Seung-Ho 대한건축사협회 2015 建築士 Vol.2015 No.3

수면과 알코올

박두흠,유재학,유승호,Park, Doo-Heum,Yu, Jae-Hak,Ryu, Seung-Ho 대한수면의학회 2006 수면·정신생리 Vol.13 No.1

Alcohol has extensive effects on sleep and daytime sleepiness. Alcohol has a sleep inducing effect and the effect of increased non-REM sleep and suppressed REM sleep during the first half portion of night sleep, but alcohol induces the effect of decreased non-REM sleep and increased light sleep and frequent awakenings and REM rebound during the second half portion of night sleep. Alcohol provokes chronobiological change such as the changes of amplitude or the phase shifts of hormones or core body temperature. The sleep disruption resulting from alcohol drinking may lead to daytime fatigue and sleepiness. The elderly are at particular in the increased risk of alcohol-related sleep disorders because they achieve higher levels of alcohol in the blood and brain than do younger adults after consuming an equivalent dose. Bedtime alcohol consumption among older adults may lead to unsteadiness if walking is attempted during the night, with increased risk of falls and injuries. Continued alcohol use for sleep induction often induces aggravation of insomnia, alcoholism or sleep related breathing disorders such as obstructive sleep apnea. Alcohol should not be used as substitution of sleep pill because of the dependence and tolerance for sleep inducing effect, and the sleep disruption produced by alcohol withdrawal.