노인에서 한국판 행동통제척도의 표준화 및 타당도 연구

김효진,이준영,정희연,나덕렬,조성진,조맹제,장성만 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.4

The aims of this study are to demonstrate the reliability and the validity of the Korean version of Behavioral Dyscontrol Scale (BDS-K.) and to present the normative values of BDS-K among the Korean elderly. The BDS-K was administered in a standardized manner to 1,389 healthy volunteers aged over 65 years recruited from the cornmunity. The elderly with serious neurological, medical or psychiatric disorders were excluded using screening tests. BDS-K showed good intemal consistency (Cronbach's alpha=0.812), test-retest reliability (r=0.88) and inter-rater reliability (r=0.99). Age and educational level were found to affect BDS-K score. Based on this result, normative values of BDS-K. were calculated by age and educational level. The validity of the BDS-K were demonstrated in comparison with MMSE-KC (r=0.72). BDS-K is reliable and valid instrument for measuring executive function of the elderly. The normative values suggested by this study can be widely used as reference values to objectively interpret BDS-K scores of the Korean elderly.

BDS B1C 신호 체계 분석

신예린(Yerin Shin),유호영(Hoyoung Yoo) 한국전기전자학회 2020 전기전자학회논문지 Vol.24 No.2

오늘날 민간에서 사용 중인 측위 시스템의 대부분은 위성의 신호를 수신하여 현재 위치를 계산하는 글로벌 위성항법시스템(GNSS; Global Navigation Satellite System)을 기반으로 한다. 미국이 GPS (Global Positioning System)를 통하여 입증한 GNSS의 효용성은 다양한 국가에서 위성항법 시스템을 구축하고 고도화 하도록 이끌었다. 그중 중국은 앞선 IT기술력과 자금력을 바탕으로 자체 GNSS인 베이더우 위성항법 시스템(BDS; BeiDou Navigation Satellite System)의 급진적인 개발을 성공시켰다. 중국이 빠르게 전 세계로 BDS의 서비스 영역을 확대하고 있는 것을 고려할 때 우리나라에서도 BDS에 대한 체계적인 연구가 요구된다. 따라서 본 논문에서는 BDS의 공개 신호인 B1C에 대한 전반적인 정보를 제공하여 B1C 신호 체계 설계 및 BDS B1C 수신기 설계에 활용될 수 있도록 한다. Most civilian positioning systems in use are based on the Global Navigation Satellite System (GNSS), which receives signals from satellites and calculates the current location. After the successful establishment of GPS from the U.S., GNSS has led to promote satellite navigation systems in various countries. Recently, China has succeeded in the radical development of its own GNSS, the BeiDou Navigation Satellite System (BDS), based on its advanced IT technology and funding power. Considering that China is rapidly expanding the service area of BDS to the world, systematic research on BDS is also required in Korea. Therefore, this paper provides overall information on B1C, the open signal of BDS, so that this information can be utilized in the design of B1C signal system and BDS B1C receiver design.

동해 해저코어에서 발견된 중기 플라이스토세 B-KY1 테프라와 백두산 화산에서 채취된 BDS-T1 테프라의 비교 분석

천종화,정대교 대한지질학회 2023 지질학회지 Vol.59 No.4

During the Middle Pleistocene Plinian eruption of Baekdusan volcano, approximatly 135,000 years ago, Baekdusan-KitaYamato1 (B-KY1) tephra was transported and deposited in ODP 794A marine core in the East Sea, located approximately 900 km to the east of Baekdusan volcano. In previous studies, the age of some zircon included in the ‘millennial eruption (940-950 CE)’ tephra from Baekdusan volcano was analyzed to be 110,000 to 130,000 years ago. This suggests the possibility of magma formation and volcanic eruption at Baekdusan volcano during that period. Reddish-brown Baekdusan-T1 (BDS-T1) tephra was discovered beneath the Biotoushan III trachyte/comendite lava unit in Baekdusan volcano, dating from 20,000 to 220,000 years ago. This study conducted a comparative analysis of the stratigraphic positions and major elemental composition between BDS-T1 tephra collected from Baekdusan volcano and B-KY1 tephra found in marine core.

중국의 군사전략과 GNSS 분석

최창묵 ( Chang-mook Choi ) 해군사관학교 해양연구소 2021 해양과학기술 Vol.54 No.0

Operating a global satellite navigation system has great significance to a nation regarding economic effect and military strategy. Therefore, world powers have been establishing and operating their own navigation systems. China has also promoted development since 2000, and has declared BDS-3 Full Operation Capability (FOC) in June 2020. Thus, in this paper, China's military strategy and GNSS strategy and system performance were analyzed and compared with the US's GPS. The analysis showed that 10-13 satellites could receive BDS, which is 1-2 satellites more than GPS. However, in terms of DOP, the results were lower than GPS. This result is because BDS consists of 3 orbits GEO, IGSO, and MEO, so the results were good in certain areas but bad in certain areas. Also, accuracy wise the standard deviation of the latitude and longitude were 5m or less, showing excellent performance. Therefore, in the current situation where China's BDS-3 has built 30 satellites, it can be confirmed that China's BDS is on equal terms with the US's GPS.

Performance Analysis of BDSBAS and MSAS in Korea

Noh, Jae Hee,Lim, Deok Won,Lee, Ju Hyun,Jo, Gwang Hee,Lee, Sang Jeong 항법시스템학회 2020 Journal of Positioning, Navigation, and Timing Vol.9 No.3

China has deployed BDS along with the service of SBAS by 2020. Currently, the correction information for testing BDSBAS is provided through the BDS B1I signal. Many research on SBAS other than BDSBAS has been conducted in Korea. However, studies on BDSBAS are insufficient although Korea is included in both the coverage area of MSAS and BDSBAS. Therefore, it is necessary to continuously analyze the performance of MSAS and BDSBAS. In this paper, the performance of MSAS and BDSBAS in Korea, China, and Japan is analyzed in the aspect of positioning accuracy using the GNSS RINEX data provided by IGS. A Software platform is designed to analyze the performance of GPS-only, BDS-only, GPS/MSAS and BDS/BDSBAS. From the result, it can be concluded that the accuracy enhancement can be hardly seen when using the correction information of MSAS and BDSBAS in Korea

고해상도 Bootstrapped Differential Semblance를 이용한 자동 속도분석

최형욱 ( Hyung Wook Choi ),변중무 ( Joong Moo Byun ) 한국지구물리·물리탐사학회 2013 지구물리와 물리탐사 Vol.16 No.4

The accuracy of the automatic NMO velocity analysis, which is used for an effective and objective NMO velocity analysis, is highly affected by the velocity resolution of the velocity spectrum. In this study, we have developed an automatic NMO velocity algorithm, where the velocity spectra are created using high-resolution bootstrapped differential semblance (BDS), and the velocity analysis on CMP gathers is performed in parallel with MPI. We also compared the velocity models from the developed automatic NMO velocity algorithm with high-resolution BDS to those from BDS. To verify the developed automatic velocity analysis module we created synthetic seismic data from a velocity model including horizon layers. We confirmed that the developed automatic velocity analysis module estimated velocity more accurately. In addition, NMO velocity which yielded a CMP stacked section, where the coherency of the events were improved, was estimated when the developed module was applied to a marine field data set.

Kv3.1 and Kv3.4, Are Involved in Cancer Cell Migration and Invasion

Song, Min Seok,Park, Su Min,Park, Jeong Seok,Byun, Jin Ho,Jin, Hee Jung,Seo, Seung Hyun,Ryu, Pan Dong,Lee, So Yeong MDPI 2018 INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES Vol.19 No.4

<P>Voltage-gated potassium (Kv) channels, including Kv3.1 and Kv3.4, are known as oxygen sensors, and their function in hypoxia has been well investigated. However, the relationship between Kv channels and tumor hypoxia has yet to be investigated. This study demonstrates that Kv3.1 and Kv3.4 are tumor hypoxia-related Kv channels involved in cancer cell migration and invasion. Kv3.1 and Kv3.4 protein expression in A549 and MDA-MB-231 cells increased in a cell density-dependent manner, and the pattern was similar to the expression patterns of hypoxia-inducible factor-1α (HIF-1α) and reactive oxygen species (ROS) according to cell density, whereas Kv3.3 protein expression did not change in A549 cells with an increase in cell density. The Kv3.1 and Kv3.4 blocker blood depressing substance (BDS) did not affect cell proliferation; instead, BDS inhibited cell migration and invasion. We found that BDS inhibited intracellular pH regulation and extracellular signal-regulated kinase (ERK) activation in A549 cells cultured at a high density, potentially resulting in BDS-induced inhibition of cell migration and invasion. Our data suggest that Kv3.1 and Kv3.4 might be new therapeutic targets for cancer metastasis.</P>

A Study on BMS by BDS for Distribution-Business: Business Model System by Buyer's Decision Step

Heon-Wook Lim,서대성 한국유통과학회 2019 유통과학연구 Vol.17 No.4

Purpose - The business model is a method of creating corporate value, in existing "classification of business model", limitations and redundancy phenomena are applied when a new type flows in, and as consumer's purchasing decision of consumer behavior 5 steps. The classification schemes can be used for more accurate data analysis by proposing a new mapping technique in the fourth industry. Research design, data, and methodology - It was far more classified on the business model (BMS by BDS), and so on. Designing the new horizons of logistics, marketing, methodology by reclassifying these existing data to new useful data with the old methods, in order to analyze the areas where the problem has been raised for the point that the existing methods are not suitable configured. This will be applicable to the system of quaternary industry from the perspective of the buyer. Results - The mapping results of the consumer purchase decision were as follows,the 1st stage (interest) was 23.73%, 2nd stages (publicity) 33.90%, 3rd stages (sales) 13.56%, 4th stages (decision) 11.86%, 5th stages (repurchaser) 16.95%. This verified that "the business model can be classified through “BMS by BDS". Conclusions - This structural classification is the basis of logistics marketing in the 4th industry, and proposes a innovative and effective model of constructing theory.

Analysis of Multi-Differential GNSS Positioning Accuracy in Various Signal Reception Environments

Tae, Hyunu,Kim, Hye-In,Park, Kwan-Dong The Institute of Positioning 2018 Journal of Positioning, Navigation, and Timing Vol.7 No.1

This study analyzed positioning accuracy of the multi-differential global navigation satellite system (DGNSS) algorithm that integrated GPS, GLONASS, and BDS. Prior to the analysis, four sites of which satellite observation environment was different were selected, and satellite observation environments for each site were analyzed. The analysis results of the algorithm performance at each of the survey points showed that high positioning performance was obtained by using DGPS only without integration of satellite navigation systems in the open sky environment but the positioning performance of multi-DGNSS became higher as the satellite observation environments degraded. The comparison results of improved positioning performance of the multi-DGNSS at the poor reception environment compared to differential global positioning system (DGPS) positioning results showed that horizontal accuracy was improved by 78% and vertical accuracy was improved by 65% approximately.

Analysis of Multi-Differential GNSS Positioning Accuracy in Various Signal Reception Environments

태현우,김혜인,박관동 사단법인 항법시스템학회 2018 Journal of Positioning, Navigation, and Timing Vol.7 No.1

This study analyzed positioning accuracy of the multi-differential global navigation satellite system (DGNSS) algorithm that integrated GPS, GLONASS, and BDS. Prior to the analysis, four sites of which satellite observation environment was different were selected, and satellite observation environments for each site were analyzed. The analysis results of the algorithm performance at each of the survey points showed that high positioning performance was obtained by using DGPS only without integration of satellite navigation systems in the open sky environment but the positioning performance of multi- DGNSS became higher as the satellite observation environments degraded. The comparison results of improved positioning performance of the multi-DGNSS at the poor reception environment compared to differential global positioning system (DGPS) positioning results showed that horizontal accuracy was improved by 78% and vertical accuracy was improved by 65% approximately.