Photometric Study of the W UMA Type Eclipsing Binary AK Herculis

by Seong-Hong Park, Yong-Sam Lee, Jang-Hae Jeong
Published 1999-06-01

A Study on the Operation Mechanism of Ongnu, the Astronomical Clock in Sejong Era

by Sang Hyuk Kim, Yong Sam Lee, Min Soo Lee
Published 2011-03-01

Photometric Observations of the Contact Binary System V523 Cassiopeiae

by Jang Hae Jeong, Chun-Hwey Kim, Yong-Sam lee
Published 2006-09-01

A Study for the Restoration of Hong Dae-Yong Honsangui - Focusing on the structure and operating mechanism -

by Yong Sam Lee, Sang Hyuk Kim, Je Hoon Park
Published 2013-09-01

PHOTOMETRIC OBSERVATIONS AND ANALYSIS OF THE W UMa TYPE ECLOPSING BINARY VW Cep

by Bong-Seok Kang, Yong-Sam Lee, Jang-Hae Jeong
Published 2000-06-01

BVRI Standardization of the CCD Photometric System of Sobaeksan Optical Astronomy Observatory

by Jang Hae Jeong, Chun-Hwey Kim, Yong-Sam lee
Published 2008-06-01

Photometric Study of Extreme Long Period Eclipsing Binary 31 CYG

by Jang Hae Jeong, Yong-Sam Lee, Ho-Il Kim
Published 1991-12-01

Analysis on the Hour-lines of Yangcheon-cheok

by Sang Hyuk Kim, Byeong-Hee Mihn, Yong Sam Lee
Published 2017-03-01

BVRI Photometry of VV Cephei

by Il-Seong Nha, Hong-Seo Im, Yong-Sam Lee, Jang-Hae Jeong
Published 1992-06-01

UBV Monitoring of EPS Aurigae (I)

by Il-Seong Nha, Yong-Sam Lee, Ho-Il Kim, Kyoung-Hee Lee
Published 1988-06-01

Astronomical Calendar and Restoration Design of Clepsydra in the Silla era

by Yong Sam Lee, Jang Hae Jeong, Sang Hyuk Kim, Yong Bok Lee
Published 2008-09-01

The Principle and Structure of the Gyupyo(Gnomon) of King Sejong's Reign in Choson Dynasty

by Yong Sam Lee, Jang Hae Jeong, Chun-Hwey Kim, Sang Hyuk Kim
Published 2006-09-01

Photographic and Photoelectric Observations of Comet P/Halley in 1985-86

by Il-Seong Nha, Yong-Sam Lee, Ho-Il Kim, Yong-Woo Chun
Published 1989-06-01

A Study on the Internal Structure of Heumgyeonggaknu

by Sang Hyuk Kim, Yong Sam Lee, Min Soo Lee, Sun Young Ham
Published 2013-06-01

Examination of Orbital Period of ZZ Cancri

by Ho-Il Kim, Sang-Seong Kim, Il-Seong Nha, Yong-Sam Lee
Published 1989-12-01

Photoelectric Observations and UBVRI Light Curves Analysis of Algol

by Jang Hae Jeong, Yong-Sam Lee, Jo-Ryeong Yim, Kam-Ching Leung
Published 1993-12-01

BVR Standardization of the CCD Photometric System of Chungbuk National University Observatory

by Jang-Hae Jeong, Yong-Sam Lee, Chun-Hwey Kim, Yo-Na Yoon
Published 2009-06-01

Scale Marking Method on the Circumference of Circle Elements for Astronomical Instruments in the Early Joseon Dynasty

by Byeong-Hee Mihn, Ki-Won Lee, Young Sook Ahn, Yong Sam Lee
Published 2015-03-01

A Study on Ganui-Dae’s External Form and Its Modeling for Restoration

by Min-Soo Lee, Yong Sam Lee, Jun Hyeok Jeon, Sang Hyuk Kim
Published 2013-12-01

A Study on the Armillary Spheres of the Confucianists in Joseon Dynasty

by Yong Sam Lee, Sang Hyuk Kim, Min Soo Lee, Jang Hae Jeong
Published 2010-12-01