Zobrazeno 1 - 10
of 498
pro vyhledávání: '"Sang Young Park"'
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 41, Iss 2, Pp 61-78 (2024)
This study developed a real-time spacecraft pose estimation algorithm that combined a deep learning model and the leastsquares method. Pose estimation in space is crucial for automatic rendezvous docking and inter-spacecraft communication. Owing to
Externí odkaz:
https://doaj.org/article/a38fd81a2d6c4a12948b27f0c376a4f6
Publikováno v:
Aerospace, Vol 11, Iss 2, p 135 (2024)
CANYVAL-C is a formation-flying mission that demonstrates a coronagraph utilizing two CubeSats. The coronagraph is a space telescope that blocks sunlight to examine the overcast regions around the sun. It is composed of optical and occult segments. T
Externí odkaz:
https://doaj.org/article/c5ed1e0ad2c340939da42a4e7216a80d
Autor:
Pureum Kim, Sang-Young Park
Publikováno v:
Aerospace, Vol 10, Iss 10, p 855 (2023)
This study investigates the preliminary trajectory design for high-thrust missions to near-Earth asteroids (NEAs), considering distance and phase angle constraints during the approaching phase to enable pre-rendezvous optical navigation and the scien
Externí odkaz:
https://doaj.org/article/e5f37a07de3d4265b2f39e3c501caac0
Publikováno v:
Archives of Endocrinology and Metabolism, Vol 65, Iss 6, Pp 758-767 (2021)
ABSTRACT Objective: Contrast-enhanced brain magnetic resonance imaging (MRI) is routinely performed in children with central precocious puberty (CPP). We evaluated the value of a dedicated sellar MRI protocol without contrast enhancement in girls wit
Externí odkaz:
https://doaj.org/article/6b06bb041b4e416aa4db6ca7fd477746
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 38, Iss 2, Pp 105-117 (2021)
In this study, a preliminary trajectory design is conducted for a conceptual spacecraft mission to a near-Earth asteroid (NEA) (99942) Apophis, which is expected to pass by Earth merely 32,000 km from the Earth’s surface in 2029. This close approa
Externí odkaz:
https://doaj.org/article/c98e088efd7b402bbc4a755a582ddb66
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 37, Iss 3, Pp 199-208 (2020)
This paper presents a kinematic ephemeris generator for Korea Pathfinder Lunar Orbiter (KPLO) and its performance test results. The kinematic ephemeris generator consists of a ground ephemeris compressor and an onboard ephemeris calculator. The gro
Externí odkaz:
https://doaj.org/article/293dffad21d34028b30657e98f5434dd
Autor:
Jong Won Jo, Joungkyo Sim, Joo Suk Sim, Young-Nam Kwag, Hyung So Kim, Sang Young Park, Sang-Kuk 한, Jae-Gu Han, Seung Hwan Oh, Chang Sun Kim
Publikováno v:
한국균학회지, Vol 48, Iss 3, Pp 345-353 (2020)
As part of the mushroom surveys in the unexplored areas of Korea in 2019 and 2020, a phalloid fungus was found in a saline sand beach. The specimen was mainly characterized by its reticulate pileus and violet volva with well-developed rhizomorphs. Ba
Externí odkaz:
https://doaj.org/article/42d004bcda074a9baef75a31a3fb38cf
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 37, Iss 1, Pp 51-60 (2020)
This study designs and analyzes satellite formation flying concepts for the Small scale magNetospheric and Ionospheric Plasma Experiments (SNIPE) mission, that will observe the near-Earth space environment using four nanosats. To meet the requirement
Externí odkaz:
https://doaj.org/article/81f5050bb2b3442db52b6fe64d58c8c3
Publikováno v:
Journal of Astronomy and Space Sciences, Vol 36, Iss 4, Pp 249-264 (2019)
In this study, the precise orbit determination (POD) software is developed for optical observation. To improve the performance of the estimation algorithm, a nonlinear batch filter, based on the unscented transform (UT) that overcomes the disadvantag
Externí odkaz:
https://doaj.org/article/87f68cc1efdf454abdc93551fc3e3d00
Publikováno v:
Clinical Endoscopy, Vol 52, Iss 6, Pp 612-615 (2019)
Among gastrointestinal emergencies, acute upper gastrointestinal bleeding remains a challenging clinical problem owing to significant patient morbidity and costs involved in management. Endoscopic hemostatic therapy is the mainstay of treatment and d
Externí odkaz:
https://doaj.org/article/f0a322a81a764d9f9b0bc21a8d7dbdee