Zobrazeno 1 - 10
of 176
pro vyhledávání: '"Sangyong Lee"'
Publikováno v:
Applied Sciences, Vol 14, Iss 13, p 5803 (2024)
Owing to the massive expansion and intermittent nature of renewable power, green hydrogen production, storage, and transportation technologies with improved economic returns need to be developed. Moreover, the slowness of the dehydrogenation reaction
Externí odkaz:
https://doaj.org/article/8fb3399321754d19a567ac6e94558dd0
Autor:
Junho Shin, Jung Hoon Kim, Jungeun Lee, Sangyong Lee, Jong Hwan Park, Seung Yol Jeong, Hee Jin Jeong, Joong Tark Han, Seon Hee Seo, Seoung-Ki Lee, Jungmo Kim
Publikováno v:
Nanomaterials, Vol 14, Iss 13, p 1094 (2024)
The efficient dispersion of single-walled carbon nanotubes (SWCNTs) has been the subject of extensive research over the past decade. Despite these efforts, achieving individually dispersed SWCNTs at high concentrations remains challenging. In this st
Externí odkaz:
https://doaj.org/article/f449262ab98c4cf79979181bbce52f57
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-10 (2023)
Abstract Obesity can cause various diseases and is a serious health concern. BMI, which is currently the popular measure for judging obesity, does not accurately classify obesity; it reflects the height and weight but ignores the characteristics of a
Externí odkaz:
https://doaj.org/article/73f6dfec80ba4134b91e7c2a6fcb5ce8
Autor:
Seokkyun Ko, Sangyong Lee
Publikováno v:
Applied Sciences, Vol 13, Iss 21, p 11947 (2023)
Research was conducted to improve the system efficiency of a fuel-processing system combined with a hydrogen-purification system to supply hydrogen to a 10 kW residential building proton-exchange membrane fuel cell (PEMFC). The system consists of a s
Externí odkaz:
https://doaj.org/article/97f05ec81eda4fb1bae9be7a860a7164
Publikováno v:
Catalysts, Vol 13, Iss 10, p 1380 (2023)
Hydrogen for building fuel cells is primarily produced by natural-gas steam-reforming reactions. Pipeline-transported natural gas in Europe and North America used to contain about 1% to 5% N2, which reacts with H2 in steam-reforming reactions to form
Externí odkaz:
https://doaj.org/article/194e8c034c764e03bfa0e83f62a9b2f6
Publikováno v:
IEEE Access, Vol 10, Pp 69750-69756 (2022)
Decision tree algorithm (DT) is a commonly used data mining method for classification and regression. DT repeatedly divides a dataset into pure subsets based on impurity measurements such as entropy and Gini. Then relatively “pure” partitions con
Externí odkaz:
https://doaj.org/article/ddfb19d7ee9d4eeeb4600f0ed4fede5d
Theoretical Analysis for Improving the Efficiency of HT-PEMFC through Unreacted Hydrogen Circulation
Autor:
Sanghyoun Park, Sangyong Lee
Publikováno v:
Applied Sciences, Vol 13, Iss 16, p 9292 (2023)
To increase the efficiency of a fuel processor and HT-PEMFC (high temperature-proton exchange membrane fuel cell) combined system, it is essential to improve the efficiency of the fuel processor. In this research, the fuel processor was simulated by
Externí odkaz:
https://doaj.org/article/7fbb7521580c49da9992ff08ea335495
Autor:
Mujahid Naseem, Sangyong Lee
Publikováno v:
Energy Reports, Vol 6, Iss , Pp 1748-1759 (2020)
Natural gas hydrates (NGH) is the largest energy reservoir in the globe which consists of natural gas and water in icy form at artic permafrost regions and deep ocean floors but is still undeveloped due to several technical and economic issues. Findi
Externí odkaz:
https://doaj.org/article/2712a9365ebd423d9f2b8af260aa1e47
Publikováno v:
International Journal of Hyperthermia, Vol 37, Iss 1, Pp 573-584 (2020)
Purpose In this study, we developed a novel nitinol-actuated surgical instrument to conduct laparoscopic renal denervation for the treatment of resistant hypertension. We investigated whether shape and temperature settings of nitinol specimens fit we
Externí odkaz:
https://doaj.org/article/9820a2b2dd894f51984b608c02fe6eac
Publikováno v:
Materials, Vol 14, Iss 24, p 7613 (2021)
The development of alternate clean energy resources is among the most pressing issues in the energy sector in order to preserve the global natural environment. One of the ideal candidates is the utilization of hydrogen as a primary fuel in lieu of fo
Externí odkaz:
https://doaj.org/article/22a55fac6a7a4499915d75fe1dccca21