• Journal of Korea Multimedia Society
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• v.20 no.2
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• pp.234-243
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• 2017

With the development of smartphone technologies enable photoplethysmogram (PPG) acquisition by camera and heart rate (HR) measurement. This papers presents improved algorithm to extract HR from PPG signal recorded by smartphone camera and to develop real-time PPG signal processing Android application. 400 video samples recorded by Samsung smartphone camera are imported as input data for further processing and evaluating algorithm on MATLAB. An optimized algorithm is developed and tested on Android platform with different kind of Samsung smartphones. To assess algorithm's performance, medical device Beurer BC08 is used as reference. According to related works, accuracy parameters includes 90% number of samples that has relative errors less than 5%, Person correlation (r) more than 0.9, and standard estimated error (SEE) less than 5 beats-per-minutes (bpm).

• ALGAE
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• v.23 no.3
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• pp.201-207
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• 2008

Based on samplings during 2006-2007 on the intertidal zone of Playa Tampico, Eréndira and Punta Baja, Baja California, Ulva pertusa Kjellman (Ulvales, Chlorophyta) was recorded for the first time for the Pacific coast of Mexico. An alga native to Asia, U. pertusa has just recently been recorded in the southern coast of California (USA). The identification of U. pertusa was based on the observation of the morphology and reproductive characters of the collected specimens. Furthermore, the species identity was confirmed by molecular comparison between nuclearencoded ITS2 sequences of the Mexican samples and those of other Ulva species in GenBnak data. Habitat and distribution of U. pertusa along the Pacific coast of North America are also described. Considering our new report of its occurrence in Mexico, we conclude that U. pertusa is expanding its geographical distribution by trans-ocean introductions.

• The Journal of Korean Medical History
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• v.14 no.2
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• pp.83-107
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• 2001

"Aheuichaulyo御醫撮要" was known to be published by Choi Jong-jun崔宗峻 in Korea高麗 Dynasty(A.D.1226), however its original copy is not available at the present. It was thought that Korean folk medicine and the remedies were recorded in this book, and these were recorded in "Euibangyoochui醫方類聚" published in Chosun朝鮮 dynasty(1445). "Euibangyoochui" is called a treasure-house of the knowledge of traditional oriental medicine which contains over 50,000 prescriptions and enormous amount of medical information. The restoration of "Aheuichaulyo" was possible during the process of establishment of data base work of "Euibangyoochui". "Aheuichaulyo" was restored as 132 chapters mainly from the related con tents of "Euibangyoochui" and partially from the contents of "Hyangyakjipsungbang鄕藥集成方" and "Boonmoononyukyihaebang分門瘟疫易解方" for the supplement.

• Animal Systematics, Evolution and Diversity
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• v.30 no.3
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• pp.176-182
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• 2014

Two genera and two species of the family Erebidae, which is the largest family in Noctuoidea after recently redefined, are newly recorded in Korea: Luceria striata Galsworthy and Metachrostis sinevi Matov et Kononenko. In addition, supplementary collecting data are provided for the two species of Erebidae, Lophomilia nekrasovi Kononenko et Behounek and Acontia martjanovi (Tschetverikov), whose Korean distribution has been briefly reported. The female genitalia of Luceria striata are described for the first time. Photos of imagines and genitalia, where available, are provided. All the examined specimens are deposited in the Department of Plant Medicine, Chungbuk National University in Cheongju, Korea.

• Proceedings of the KIEE Conference
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• 2007.10a
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• pp.101-102
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• 2007

Heart diseases are critical and should be detected as soon as possible. A stethoscope is a simple device to find cardiac disorder but requires keen experiences in heart sounds. We evaluate a cardiac disorder classifier by using heart sounds recorded by a digital wireless stethoscope developed in this work. The classifier uses hidden Markov models with circular state transition to model the heart sounds. We train the classifier using two kinds of data: One recorded by using our stethoscope and the other sampled from a clean heart sound database. In classification experiments using 165 sound clips, the classifier shows the classification accuracy of 82% in classifying 6 cardiac disorder categories.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2003.10a
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• pp.479-486
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• 2003

The characteristics of harmonic phase angles and phase angle differences contained in earthquake ground motions such as El Centre 1940 NS, Taft1 1952 NS, Hachinohe 1968 NS and Mexico 1985 are figured, which have been mostly overlooked in contrast with the importance placed on harmonic amplitudes. Recently, performance based design method is used for seismic design and seismic retrofitting, which needs nonlinear response analysis, there must be earthquake ground accelerations which contain the phase angle, the phase angle difference and energy input spectrum characteristics of the zone considered to be constructed building structures. To make clear the importance of phase angle differences, responses of 4 recorded earthquake ground motions, 4-earthquake ground motions normalized by 110 gal and 4 artificial earthquake motions compatible to the seismic building code of Korea are compared.

• Korean Journal of Child Studies
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• v.18 no.2
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• pp.121-130
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• 1997

This study investigated differences in the topic performance of 3-year-old Korean and American children. Sixteen mother and child dyads (8 Americans and 8 Koreans) were tape-recorded during naturally occurring conversations. The cape-recorded data were transcribed on the observational chechlist by Kertoy Vetter(1995). Korean children engaged in topic performance nearly twice as often as American children. Korean children engaged in topic termination/initiation and continuation more often than American children. Also, Korean children engaged in topic collaboration and incorporation more often than American children, but there was no difference in off-topic.

• Proceedings of the Earthquake Engineering Society of Korea Conference
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• 1999.10a
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• pp.72-82
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• 1999

The microearthquake and explosion events recorded in the seismic KNUE(Korea National University of Education) network were analyzed. The seismic data were recorded from Dec. 1997 to Dec. 1998. Total of 118 records consisted of 24 earthquake and 4 explosion events were instrumented at 6 stations. Spectral values increases as magnitude increases and the predominant frequency band expands to low frequency. zone as magnitude increases. Three-dimensional spectrograms(time frequency. amplitude) were also synthesized in order to discriminate microearthquakes and artificial underground explosions. The waves from microearthquakes show that frequency content of dominant amplitude appeared above 10 Hz and the discrimination can be performed in almost all the frequency domain of 3-d spectrogram.

• Korean journal of applied entomology
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• v.60 no.2
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• pp.235-239
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• 2021

In this study, one newly recorded species, P. vittapenna Kim & Park, of the Promalactis is recognized. A diagnosis and distributional data are provided with illustrations of its adult and genitalia. A taxonomic key to all Laos Promalactis species is also provided.

• Journal of Species Research
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• v.12 no.2
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• pp.180-188
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• 2023

The region of the marine environment between shallow waters and deep-sea (30-150 m in depth) is referred to as the twilight or mesophotic zone. This zone has been scarcely examined, as these depths are too shallow for safe submersible operation. Since 2018, a survey of mesophotic echinoderms in Korea has yielded many specimens of interest. In this study, we present two newly recorded echinoderms, Henricia irregularis and Parastichopus nigripunctatus based on morphological redescriptions with high-definition photographs and DNA barcoding data for P. nigripunctatus.