CONTENT OF JKAS DECEMBER 2017 ISSUE

Dear members and friends of the KAS,

it is my pleasure to bring to you the content of the latest issue of JKAS (vol. 50, no. 6, December 2017). This issue contains the following five papers:

"Time Variations of the Radial Velocity of H2O Masers in the Semi-Regular Variable R Crt"
by Hiroshi Sudou et al.
http://jkas.kas.org/journals/2017v50n6/v50n6p157_sudou.pdf

"The Millimeter-Radio Emission of BL Lacertae during Two γ-Ray Outbursts"
by Dae-Won Kim et al.
http://jkas.kas.org/journals/2017v50n6/v50n6p167_trippe.pdf

"An Inversion Method for Deriving Physical Properties of a Subsurface Magnetic Field from Surface Magnetic Field Evolution. I. Application to Simulated Data"
by Tetsuya Magara
http://jkas.kas.org/journals/2017v50n6/v50n6p179_magara.pdf

"Temporal Variation of HCO+ 1-0 Galactic Absorption Lines toward NRAO 150 and BL Lac"
by Junghwan Han et al.
http://jkas.kas.org/journals/2017v50n6/v50n6p185_yspark.pdf

"Analysis of Time Data in Korean Almanacs of 1913-1945"
by Ki-Won Lee
http://jkas.kas.org/journals/2017v50n6/v50n6p191_kwlee.pdf

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Truly yours,

Sascha Trippe
JKAS Editor-in-Chief
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