In this study, structural properties of foamed aerated concrete with and without pulverized
bone were investigated. These properties are: workability, plastic and testing densities …

Inhalation of radon (222Rn) and its daughter product are a major source of natural radiation
exposure. The measurement of radon activity in dwelling is assuming ever increasing …

There are several archaeological sites in the Taedong river basin around Pyongyang.
Recently, the Palaeolithic Tongamdong site was newly unearthed in this area. This …

Calcite crystals were prepared by dropping a saturated calcium carbonate aqueous solution
on a substrate. The calcite crystals were grown with a growth rate of approximately 0.7 …

Thorium-to-uranium ratios have been determined in different soil samples using CR-39 and
LR-115-II solid-state nuclear track detectors (SSNTDs). A calibration method based on …

A criterion for formation of etchable tracks in solids is suggested using the well-known
concepts of ionization and thermal spikes, diffusion process with useful and justified …

Hyangmokri cave site was newly excavated in Kangdong County, Pyongyang City a few
years ago. The sedimentary deposits in the cave consist of seven different layers. According …

Joohyondong Cave site has been discovered in Joohyondong, Kangdong County,
Pyongyang, the Democratic People's Republic (DPR) of Korea. This is a small natural cave …

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-----A Monte Carlo method for determining the intrinsic and extrinsic efficiencies detection of …

The fission fragments and heavy ions tracks in CR-39 detectors registered by Cf-252
radioactivesource have been observed by using photo-spectrometric techniques. CR-39 …