김동연 교수

Protonic ceramic electrochemical cells (PCECs) have attracted considerable attention owing to their ability to reversibly convert chemical fuels into electricity at low temperatures below 600 °C. However, extreme sintering conditions during conventional convection-based heating induce critical problems for PCECs such as nonstoichiometric electrolytes and microstructural coarsening of the electrodes, leading to performance deterioration. Therefore, we fabricated PCECs via a microwave-assisted sin

Abstract Protonic ceramic electrochemical cells (PCECs) hold great promise as an energy conversion and storage technology at lower temperatures (400–650 °C). However, the sluggish reaction kinetics at the oxygen electrode hinder the electrochemical activity of PCECs. Herein, a series of bifunctional oxygen electrodes based on bimetal‐doped BaCoO 3‐𝛿 (BCO) are reported. Doping hampers hexagonal perovskite formation and transforms BCO into cubic perovskite, improving water uptake and hydration abi

Smart speakers enable communication through a voice interface and are among the fastest growing consumer technologies globally; they provide a new and innovative medium for the delivery of interactive advertisements and the sale of products, known as “conversational commerce.” However, despite the promising potential of the use of smart speakers as a new advertising channel, little is known about the effectiveness of advertisements made through this medium. Therefore, this article investigates h

The smart speaker is currently one of the fastest-growing consumer technologies. As a result, more and more people are buying products through smart speakers. However, because voice commerce advertisements are not yet active, little is known about the effectiveness of smart speaker advertisements. This study assessed advertisement effectiveness using several distinctive features of the smart speaker: interactivity, contextually relevant advertisements, and voice changes. Study 1 illustrates that

최근 고로슬래그 미분말의 사용량이 증가함에 따라 고로슬래그 미분말 혼입 시멘트의 수화반응 모델뿐만 아니라 압축강도, 수화생성물, 수화열 등 고로슬래그 미분말 혼입 시멘트 페이스트의 물성에 관한 연구가 활발히 진행되고 있다. 하지만 고로슬래그 미분말 혼입 시멘트 페이스트의 물성에 큰 영향을 끼치는 고로슬래그 미분말의 반응도에 대한 연구는 세계적으로도부족하며 특히 국내에서는 전무한 실정이다. 따라서 본 연구는 선택적 추출법을 이용하여 시멘트 페이스트 내 고로슬래그 미분말의 반응도를 정량분석하고 물 바인더비, 치환율, 양생온도에 따라 압축강도, 화학결합수, Ca(OH)2을 측정하여 비교 분석 하였다. 실험결과 시멘트 페이스트 내 고로슬래그 미분말의 반응도, 화학결합수, Ca(OH)2은 치환율이 낮고 물 바인더비와 양생 온도가 높을수록 높게 나타났으며 특히 고로슬래그 미분말의 반응도는 최종적으로 약 0.3~0.4 값에 수렴하는 것으로 나타났다.

Consumers refer to reviews in online review systems to collect information for their purchasing decisions. Therefore, the introduction of ‘verified purchase badges’ in some review systems can make an interesting and dynamic impact on product sales. The main objective of this study is to find the differences in the effect of verified and non-verified purchase reviews on product sales from the perspective of WOM metrics (i.e., volume, valence, and helpfulness). Therefore, this study performs a

The surge in digital transformation within financial technology has catalyzed the development of super-apps—comprehensive mobile applications designed to serve a multitude of a customer’s daily needs on a single platform. Despite their widespread use, there is a dearth of research regarding customer adoption in the banking industry. Employing the integrated Information Systems (IS) success model, this study delves into how the characteristics of mobile banking super-apps influence user adoption