Recent progress in oxygen electrodes for protonic ceramic electrochemical cells

Oh Seeun,Kim Hyeonggeun,Jeong Incheol,Kim Dongyeon,Yu Hyeongmin,Lee Kang Taek 한국세라믹학회 2024 한국세라믹학회지 Vol.61 No.2

Protonic ceramic electrochemical cells, a promising technology for energy conversion and storage, have garnered significant interest in recent years owing to their superior low-temperature (< 600 °C) performance relative to solid oxide electrochemical cells. However, the sluggish kinetics of oxygen electrodes have impeded further advancements. Despite considerable research efforts, the development of practically applicable oxygen electrodes remains challenging. We herein review the recent research focusing on the fundamental understanding and development of oxygen electrode materials. Furthermore, we provide a range of material design strategies for enhancing the catalytic activity of oxygen electrodes along with a concise overview of potential derivative applications. Finally, the perspectives and potential directions for the development of oxygen electrodes for high-performance protonic ceramic electrochemical cells are presented.

매니큐어와 페디큐어 서비스가 고객 스트레스에 미치는 영향 : 기혼 직장인 여성을 중심으로

오세은 ( Seeun Oh ),정민수 ( Minsoo Jung ) 한국미용학회 2016 한국미용학회지 Vol.22 No.4

With an increase in women`s participation in public life today, working women`s occupational stress arising from changes in gender roles has emerged as an important social problem. However, insufficient are both ways to mitigate such stress in terms of beauty and health and research on related services. The current study investigated the effect of manicure and pedicure services at nail shops on married working women`s stress. The data of this study consisted of the responses of 40 married working women in their 30s living in Seoul both to nail art intervention procedures and on a stress evaluation survey. As for the dependent variable, the cognitive stress response scale was used; and the independent variable consisted of the respondents` socioeconomic characteristics. Differences in stress reduction among intervention groups were calculated by using two-way analysis of variance. According to the results of the study, stress decreased in the group who had received either manicure or pedicure service, and stress decreased significantly in the group who had received both services as well. In particular, the effect of reduction in ambivalent stress was notable among working women in their late 30s who had been married for many years when they had received both manicure and pedicure services. The current study shows that nail art intervention procedures are effective for reducing married working women`s stress. Consequently, it is necessary to systemize nail art in terms not only of beauty but also of mental health and to promote customer satisfaction and the development of related industries.

국립박물관 소장 중국 청동기 연구

오세은 국립중앙박물관 2012 고고학지 Vol.18 No.-

This study focuses on ancient Chinese bronzeware collected in the National Museum of Korea in Seoul and the Gyeongju National Museum, classifying them into several cat egories, such as food vessels, wine vessels, and water vessels, according to their function and shape, and discussing their appearance in chronological order. The result was then used as a basic material for the discussion of the characteristic features according to the date of appearance, historic significance, and the process of changes. The ancient Chinese ritual bronzeware exhibit distinctive differences in the use of designs decorating the surface as well as vessel shapes. The decorative designs are largely divided into two types, animal designs such as Gluttonous monster design(taotie), Kui dragon design(kuilong), Niaowen Bird design, Bestial design and Coiled serpent design(Panhui), and geometric de signs such as Square design, Cloud design, and Fret design. All the designs are discussed of their characteristic features changed according to times with photos and rubbings. Another characteristic element of ancient Chinese bronzeware is Jinwen, or bronze inscriptions. These inscriptions are the origin of the Chinese writing system and historic records of the ancient society. While the inscriptions on the bronze vessels collected in the National Museum are short phrases of one or two characters, they contain important in formation of the vessels, names of the related clans, event dates, and names of those who made them. The Bronze Age in China began in the Xia Dynasty, and reached the zenith regarding the production of bronze vessels during the Shang and Zhou Dynasties. The bronze ritual vessels of the Three Dynasties were produced through the ceramic mold method which had been used until the lost-wax casting technique was introduced with Buddhist images from India. The change left its traces upon the bronze vessels, helping decide their genu ineness and production dates. 본고에서는 국립중앙박물관과 국립경주박물관 소장 중국 청동기를 먼저 식기(食器), 주기(酒器), 수기(水器) 등 용도와 기형별로 분류하고 기형의 특징에 따라 제작 시기를 편년하였다. 그리고 그 기초자료를 토대로 시대별 특징을 설명하고 기형이 가지고 있는 의의와 변천 과정을 살펴보았다. 중국 청동기는 기형과 함께 문양 또한 시기별로 대표문양과 양식의 차이를 보인다. 문양은 크게 도철문(饕餮文), 기룡문(夔龍文), 조문(鳥文), 수목문(獸目文), 반훼문(蟠虺文)의 동물문과 방격문(方格文), 운문(雲文), 뇌문(雷文) 등 기하학문으로 분류하였고, 실물 사진과 함께 문양 탁본을 게재하여 시대적 특징과 그 차이를 설명하였다. 중국 청동기가 가지고 있는 또 하나의 특징은 금문(金文)이다. 금문은 중국 한자의 기원이며 과거 고대 사회의 역사 기록물이다. 비록 국립박물관 소장 청동기는 1~2자의 단문이지만, 당시 씨족의 가족명, 사건의 날짜가 기록되는 일명(日名), 용기를 만든 자의 이름을 새겨 넣은 작가명 등이 새겨져 있는 중요한 기록이다. 중국 청동기시대는 하대(夏代)부터 시작되었고, 청동기 제작의 최고 전성기는 상주시대(商周時代)라고 할 수 있다. 이 시기를 삼대(三代)라고 하며 삼대청동기의 제작 기법은 도범법(陶范法)을 사용하였다. 후에 인도에서 불상과 함께 실납법(失蠟法)이 전해질 때까지 사용된 제작기법이며 이 흔적은 고스란히 삼대청동기에 남아 있어 진위 감정과 연대 편년에도 매우 중요한 열쇠가 된다.

Real-time Temperature Monitoring to Enhance Estrus Detection in Cattle Utilizing Ingestible Bio-Sensors

Heejin Kim,Seeun Oh,Sehyeok Ahn,Byoungju Choi 한국정보기술학회 2017 한국정보기술학회논문지 Vol.15 No.11

In the case where stock farms fail to detect estrus, a 21-day non-pregnant period arises, causing additional feed costs for fertile cows, additional artificial insemination costs, and a decrease in calf productions and milk yield. Thus, accurately detecting cattle estrus and predicting the optimum time of insemination is very important as it is directly linked to the profit and production improvement of stock farms. In this paper, we propose a real-time temperature monitoring method for effective estrus detection and also applies it to cattle for case analysis. The ingestible bio-sensor utilized in this research settles in the cattle’s rumen and measures the core temperature without any external interference, which makes it possible to collect consistent and reliable data in real-time. With the proposed method the farm owner can detect a cattle’s estrus without fail, and predict the optimum time of insemination by confirming the onset point of estrus.

Well-placement optimisation using sequential artificial neural networks

Jang, Ilsik,Oh, Seeun,Kim, Yumi,Park, Changhyup,Kang, Hyunjeong SAGE Publications 2018 Energy exploration & exploitation Vol.36 No.3

IoT 기반의 실시간 가축 건강 및 번식 관리를 위한 모바일 어플리케이션 개발

김희진(Heejin Kim),오세은(Seeun Oh),안세혁(Sehyeok Ahn),최병주(Byoungju Choi) 한국정보과학회 소프트웨어공학 소사이어티 2018 소프트웨어공학회지 Vol.27 No.1

구제역 예방을 위한 축우의 실시간 체온 모니터링 방법 및 사례 연구

김희진(Heejin Kim),오세은(Seeun Oh),안세혁(Sehyeok Ahn),최병주(Byoungju Choi) 한국정보기술학회 2017 한국정보기술학회논문지 Vol.15 No.5

Foot-and-mouth disease(FMD), an acute viral epidemic, causes massive damage to farms and local economies with only one outbreak due to its wide host range and rapid propagation rate. In order to prevent widespread FMD, vaccination is carried out at all times, and external access is blocked. However, there is no cure until now. In this paper, we propose a real-time monitoring method of cattle’s temperature using an oral administrated type sensor for prevention of FMD. An oral injected sensor is placed in the ruminant stomach and enables to measure and collect the core body temperature without external environment interference. Checking and managing the health status of the cattle based on the collected real-time body temperature data can be an effective precaution for preventing FMD. In addition, the empirical case studies show that the proposed method can help prevent FMD.

Vaccination with a porcine reproductive and respiratory syndrome virus vaccine at 1-day-old improved growth performance of piglets under field conditions

Jeong, Jiwoon,Kim, Seeun,Park, Kee Hwan,Kang, Ikjae,Park, Su-Jin,Yang, Siyeon,Oh, Taehwan,Chae, Chanhee Elsevier 2018 Veterinary microbiology Vol.214 No.-

<P><B>Abstract</B></P> <P>A porcine reproductive and respiratory syndrome virus (PRRSV) modified live-virus (MLV) vaccine was evaluated under field conditions for registration as recommended by the Republic of Korea's Animal, Plant & Fisheries Quarantine & Inspection Agency. A single dose of the vaccine was administered to 1-day-old piglets and their growth performance was monitored under field conditions. Three separate farms were selected based on their history of PRRSV-associated respiratory diseases. On each farm, 40 pigs were randomly allocated to one of two treatment groups: (i) vaccinated (<I>n</I> = 20) and (ii) unvaccinated (<I>n</I> = 20) pigs at 1 day of age. Vaccinated pigs showed an increase of their market weight of 6.23 kg/pig compared to the unvaccinated pigs (98.01 kg in vaccinated group vs. 91.78 kg in unvaccinated group; <I>P <</I> 0.05) and exhibited a decrease in mortality rate by 6.7% (3.3% in vaccinated group vs. 10% in unvaccinated group; <I>P <</I> 0.05). The pigs had a sufficiently mature immune system for the vaccine to elicit humoral and cell-mediated immunity (as measured by anti-PRRSV antibodies and PRRSV-specific interferon-γ secreting cells, respectively) at 1 day of age even in the presence of maternally derived antibodies. The results presented in this study demonstrate that the PRRSV MLV vaccine is effective in improving growth performance from day 1 all the way to day 182 in endemic farms suffering with PRRSV-2 infection or both PRRSV-1 and PRRSV-2 infection.</P> <P><B>Highlights</B></P> <P> <UL> <LI> PRRSV vaccination at 1-day-old elicits anti-PRRSV antibodies even in the presence of maternally derived antibodies. </LI> <LI> PRRSV vaccination at 1-day-old induces PRRSV-specific interferon-γ secreting cells. </LI> <LI> PRRSV vaccination at 1-day-old improves growth performance from day 1 all the way to day 182 in endemic farms. </LI> </UL> </P>

배리어프리(Barrier-Free) 영화 활성화 방안

최영환(Choi, Youngwhan),신주연(Shin, Juyeon),염은유(Yeom, Eunryu),오강국(Oh, Ganggook),오세은(Oh, Seeun),윤혜정(Youn, Hyejeong),정현지(Jeong, Hyunjee),최윤경(Choi, Younkyoung),한지나(Han, Jina),홍소망(Hong, Somang),조성희(Cho, Sunghu 한국상담복지경영학회 2019 상담복지경영연구 Vol.- No.3

본 연구는 장애인의 삶의 질과 밀접한 관련성을 가진 문화향유권을 증진하기 위한 방안을 살펴보기 위한 목적으로 수행되었다. 특히 다양한 문화활동 중 장애인들이 가장 많이 이용하고 있는 활동인 영화 관람에 초점을 맞추었다. 이를 위하여 국내외 배리어프리 영화의 실태와 제도를 살펴보았다. 또한 배리어프리 영화 상영 경험에 따른 배리어프리 영화에 대한 수용도와 장애인에 대한 인식 변화를 검증하였다. 추가적으로 관련 전문가들을 대상으로 인터뷰를 통해 배리어프리 영화의 실태와 활성화 방안을 모색하였다. 연구결과를 살펴보면, 국내의 배리어프리 영화는 2010년대 이후 발전해 오고 있으나, 여전히 장애인들의 문화 활동에 대한 욕구를 충족시키기에는 미흡한 수준이다. 특히 배리어프리 영화의 절대적인 양적 측면의 성장이 미흡한 상황이므로 이에 대한 대책이 필요하다. 국내 배리어프리 영화의 확대를 위한 방안 모색에 있어서 영국은 좋은 사례가 될 수 있으므로 이에 대한 추가적인 검토가 필요하다. 배리어프리 영화 경험에 따른 배리어프리 영화에 대한 수용도와 장애인에 대한 인식 변화를 살펴본 결과에서는 배리어프리 영화를 경험한 경우 배리어프리 영화에 대한 수용도가 증가하고, 장애인에 대한 인식 역시 개선되는 것으로 나타났다. 이러한 결과를 기반으로 하여 배리어프리 영화 경험 증대를 위한 기회 확대, 기업차원이 활성화 방안 추진, 제도의 개선을 제시하였다. The purpose of this study was to find measures to promote cultural rights that are closely related to the quality of life of people with disabilities. In particular, the focus was on movies, which are the most used films for people with disabilities in various cultural activities. We examined the actual conditions and systems of barrier-free films at home and abroad. Also, according to the barrier-free movie screening experience, we examined the change of acceptance of barrier-free movie and perception of disabled people. Additionally, interviews were conducted with relevant experts to find out the status of barrier-free films and how to activate them. Result shows that barrier-free films in Korea have evolved since the 2010s, but are still insufficient to meet the needs of disabled people for their cultural activities. In particular, since the absolute quantitative growth of barrier-free movies is not enough, measures need to be taken. The UK can be a good example of exploring ways to expand domestic barrier-free films, and additional consideration is needed. As a result of examining barrier-free film acceptance and recognition of disabled people according to barrier-free film experience, the barrier-free film experience showed that acceptance of barrier-free film increased and recognition of disabled people also improved. On the basis of results, this study suggested the expansion of opportunities to increase the barrier-free movie experience, the promotion of corporate-level activation, and the improvement of the system.

Comparative evaluation of the efficacy of commercial and prototype PRRS subunit vaccines against an HP-PRRSV challenge

DUY, Do Tien,KIM, Hanjin,JEONG, Jiwoon,PARK, Kee Hwan,YANG, Siyeon,OH, Taehwan,KIM, Seeun,KANG, Ikjae,CHAE, Chanhee The Japanese Society of Veterinary Science 2018 The Journal of veterinary medical science Vol.80 No.9

<P>The objective of this study was to compare the efficacy of a commercial porcine reproductive and respiratory syndrome (PRRS) subunit vaccine and a prototype PRRS II subunit vaccine against a highly pathogenic PRRS virus (HP-PRRSV) in pigs. Both vaccines were administered intramuscularly in 2 doses at 21 and 42 days of age, and the pigs were challenged intranasally with HP-PRRSV at 63 days of age. Pigs vaccinated with the prototype PRRS II subunit vaccine had significantly higher anti-PRRSV antibody titers, a greater number of interferon-γ-secreting cells, and a greater reduction in lung lesion scores compared to pigs vaccinated with the commercial PRRS subunit vaccine. Therefore, the commercial PRRS subunit and prototype PRRS II subunit vaccines are efficacious against HP-PRRSV.</P>