Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Kwanyong Lee"'
Publikováno v:
IEEE Photonics Journal, Vol 15, Iss 4, Pp 1-9 (2023)
Pointing, acquisition, and tracking (PAT) is a major technical challenge of laser inter-satellite links (ISLs). For the fast establishment of laser link and the maximization of communication time, it is of importance to minimize the acquisition time.
Externí odkaz:
https://doaj.org/article/b06601b5d9dc49dc986ac213c84c39bf
Autor:
Kwanyong Lee, Hung-Soo Joo
Publikováno v:
Environments, Vol 10, Iss 10, p 184 (2023)
Aerobic denitrifier Alcaligenes faecalis No. 4 removes ammonium-nitrogen to nitrogen gas via denitrification in a single aerobic condition. In our previous studies, factors such as ammonium removal rate, denitrification ratio, and cell growth were te
Externí odkaz:
https://doaj.org/article/7fd16471ecf24eea93b691196dec78eb
Publikováno v:
IEEE Photonics Journal, Vol 14, Iss 4, Pp 1-8 (2022)
One of technical challenges in laser inter-satellite link (ISL) is the mitigation of performance degradation caused by pointing errors and angle-of-arrival (AoA) fluctuations arising unavoidably from satellite movements and vibrations. In this paper,
Externí odkaz:
https://doaj.org/article/87c645b74bdf492ebf742c63cfa8c3d8
Publikováno v:
Energies, Vol 14, Iss 6, p 1768 (2021)
In this study, cattle and pig slaughterhouse wastes (SHWs) were hydrothermally carbonized at 150–300 °C, and the properties of SHW-derived hydrochar were evaluated for its use as a solid fuel. The results demonstrated that increasing the hydrother
Externí odkaz:
https://doaj.org/article/bce1496c90754fc58944afb9246a1df1
Autor:
Hyeyoung Park, Kwanyong Lee
Publikováno v:
Applied Sciences, Vol 9, Iss 21, p 4568 (2019)
Gradient descent method is an essential algorithm for learning of neural networks. Among diverse variations of gradient descent method that have been developed for accelerating learning speed, the natural gradient learning is based on the theory of i
Externí odkaz:
https://doaj.org/article/8fee09772d2a492f84346228b5edc7be
Publikováno v:
Journal of Korea Technology Innovation Society. 25:1141-1158
Publikováno v:
Environmental Engineering and Management Journal. 19:589-598
Biological ammonium removal from wastewater requires coupling of nitrification and denitrification processes in respective aerobic and anaerobic conditions. This difference in environmental requirements pose a big challenge in the design of systems i
Publikováno v:
Environmental Science and Pollution Research. 26:34332-34344
Struvite precipitation is an effective method to remove and recover ammonia and phosphate from livestock wastewater. Struvite has properties similar to those of the traditional ammonium-phosphate fertilizer, which does not burn the roots owing to its
Publikováno v:
Coatings; Volume 12; Issue 4; Pages: 492
In this paper, we demonstrate the enhancement in detection sensitivity of an indirect X-ray detector based on poly(3-hexylthiophene) (P3HT) and fullerene derivatives [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) by adding perovskite quantum dot
Autor:
Chang-Hee Lee, Kwanyong Lee
Publikováno v:
Asia Communications and Photonics Conference/International Conference on Information Photonics and Optical Communications 2020 (ACP/IPOC).
An effect of beam radius control on FSO communication for vehicles in driving condition was studied. The beam radius control was effective for driving conditions with a limited beam radius and in severe vibration condition. © 2020 The Author(s)