• Parasites, Hosts and Diseases
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• 제44권4호
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• pp.285-294
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• 2006

Changing patterns of the reemerging Plasmodium vivax malaria in the Republic of Korea (South Korea) during the period 1993 to 2005 are briefly analyzed with emphasis on the control measures used and the effects of meteorological and entomological factors. Data were obtained from the Communicable Diseases Monthly Reports published by the Korea Center for Disease Control and Prevention, and webpages of World Health Organization and United Nations. Meteorological data of Kangwon-do (Province) were obtained from local weather stations. After its first reemergence in 1993, the prevalence of malaria increased exponentially, peaking in 2000, and then decreased. In total, 21,419 cases were reported between 1993 and 2005 in South Korea. In North Korea, a total of 916,225 cases were reported between 1999 and 2004. The occurrence of malaria in high risk areas of South Korea was significantly (P < 0.05) correlated with the mosquito population but not with temperature and rainfall, Control programs, including early case detection and treatment, mass chemoprophylaxis of soldiers, and international financial aids to North Korea for malaria control have been instituted. The situation of the reemerging vivax malaria in the Republic of Korea is remarkably improving during the recent years, at least in part, due to the control activities undertaken in South and North Korea.

• 조명전기설비학회논문지
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• 제27권11호
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• pp.82-88
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• 2013

It is important to give lightning warning prior to a cloud-to-ground (CG) discharge within an Area of Concern (AOC) because most of lightning damage and victim are usually occurred by the first lightning in the AOC. The aim of this study is to find the optimal operation conditions of the automated lightning warning systems in order to make the best use of the available data. In this paper, the test-operated results of the automated lightning alert and risk management system (ALARM) based on detections of CG discharge and eletrostatic field and optimized at probability of lightning have been described. It was possible to obtain the following warning performance parameters: probability of detection (POD), false alarm ratio (FAR), probability of lightning (POL) and failure-to-warn rate (FTW). The data obtained from trial operation for 5months were not sufficient but the first analysis of domestic lightning warning was carried out. We have observed that the evaluated statistical results through trial operation depend on the various factors such as analysis methods and criteria, topographical conditions, etc. Also we suggest some methods for improvement of POL and POD including the finding of the optimal electric field threshold level to be used, based on the high values of FAR and FTW found in this work.

• 한국정밀공학회지
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• 제34권1호
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• pp.41-46
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• 2017

Magnetically levitated (Maglev) vehicles maintain a constant air gap between guideway and car bogie, and thereby achieves non-contact riding. Since the straightness and the flatness of the guideway directly affect the stability of levitation as well as the ride comfort, it is necessary to monitor the status of the guideway and to alert the train operators to any abnormal conditions. In order to develop a signal processing algorithm that extracts guideway irregularities from sensor data, virtual testing using a simulation model would be convenient for analyzing the exact effects of any input as long as the model describes the actual system accurately. Simulation model can also be used as an estimation model. In this paper, we develop a state-space dynamic model of a maglev vehicle system, running on the guideway that contains jumps. This model contains not only the dynamics of the vehicle, but also the descriptions of the power amplifier, the anti-aliasing filter and the sampling delay. A test rig is built for the validation of the model. The test rig consists of a small-scale maglev vehicle, tracks with artificial jumps, and various sensors measuring displacements, accelerations, and coil currents. The experimental data matches well with those from the simulation model, indicating the validity of the model.

• 성인간호학회지
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• 제12권4호
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• pp.654-665
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• 2000

The purpose of this study was to elucidate the effects of music therapy on the preoperative anxiety of surgerial patients. The research design was a nonequivalent control, group non-synch-ronized design. The data were collected during the period from January 4 to March 17, 1999 at C-University hospital in Seoul. The subjects were sixty patients who had surgery under general anesthesia and had undergone laparotomy. They were assigned to two groups, thirty to the experimental group and thirty to the control group. They also did not have any complication, were alert enough to be interviewed and agreed willingly to participate in this study. The tool of Trait Anxiety Inventory was used to measure trait-anxiety on all patients and the Visual Analogue Scale(VAS) was used to measure state-anxiety on all patients. And systolic and diastolic blood pressure, pulse rate, and blood sugar levels were collected a the day before surgery and the preoperative period. The experimental group received music therapy with self-selected music tapes after choosing from a Music Preference Questionnaire, while the control group didn't receive music therapy. Data were analyzed by ${\chi}^2$-test, t-test, paired t-test. The results of this study are summarized as follows: 1. The preoperative state anxiety of the experimental group was re-markably lower than that of the control group. 2. Decreasing rate in the vital signs of the experimental group was remarkably lower than that of the control group. 3. The preoperative blood sugar of the experimental group was remarkably lower than that of the control group. According to these results, Music Therapy can be regarded as an effective nursing intervention that relieves preoperative anxiety of surgical patients and helper stabilize vital signs. From this study, the following recommendations can be made: 1. In order to decrease surgical patient's preoperative anxiety, I suggest the nursing intervention should go side by side with music therapy.

• 한국컴퓨터정보학회논문지
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• 제13권6호
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• pp.59-68
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• 2008

본 논문에서는 지진 기록계에 할당된 우선순위에 따라 가장 먼저 수신되는 이벤트 패킷으로부터 실제 지진과 연관된 패킷만을 추출하여 진앙을 추정하는 기법을 제안한다. 각 관측소의 지진 기록계로부터 수신된 이벤트 패킷의 신호 시간, 신호 주기 및 SNR 등을 통계적 방법으로 평가하여 실제 지진의 P파와 연관된 패킷을 추출한다. 그리고 초동 P파의 도달시간을 이용한 진앙 추정기법을 이용하여 P파와 연관된 패킷으로부터 진앙을 추정하였다. 2007년 기상청에서 발표한 국내 지진에 대하여 해당 일자의 이벤트 패킷을 이용하여 본 논문에서 제안한 P파 연관 패킷의 추출과 진앙을 추정하였다. 지진 감지 네트워크 내에서 발생한 지진의 경우 4개 이상의 관측소로부터 이벤트 패킷이 도착한 후에 매우 작은 오차 범위 내에서 진앙이 결정되는 것으로 확인되었다. 각 관측소간의 평균거리를 감안하여 타 관측기관의 이벤트 패킷을 이용할 경우에 더욱 빠른 진앙 결정과 지진경보 발령이 가능한 것으로 검증되었다. 따라서 본 연구의 결과는 국내 지진 조기 경보체계의 구축에 효율적으로 이용될 수 있을 것으로 판단된다.

• 천문학논총
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• 제30권2호
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• pp.595-597
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• 2015

LMC X-4 is an eclipsing high-mass X-ray binary exhibiting a superorbital modulation with a period of ~ 30:5 days. We present a detailed study of the variations of the superorbital modulation period with a time baseline of ~ 18 years. The period determined in the light curve collected by the Monitor of All-sky X-ray Image (MAXI) significantly deviates from that observed by the All Sky Monitor (ASM) onboard the Rossi X-ray Timing Explorer (RXTE). Using the data collected by RXTE/ASM, MAXI, and the Burst Alert Telescope (BAT) onboard Swift, we found a significant period derivative, $\dot{P}=(2.08{\pm}0.12){\times}10^{-5}$. Furthermore, the O{C residual shows complex short-term variations indicating that the superorbital modulation of LMC X-4 exhibits complicated unstable behaviors. In addition, we used archive data collected by the Proportional Counter Array (PCA) on RXTE to estimate the orbital and spin parameters. The detected pulse frequencies obtained in small time segments were fitted with a circular orbital Doppler shift model. In addition to orbital parameters and spin frequency for each observation, we found a spin frequency derivative of $\dot{v}=(6.482{\pm}0.011){\times}10^{-13}Hz{\cdot}s^{-1}$. More precise orbital and spin parameters will be evaluated by the pulse arrival time delay technique in the future.

• 한국전자통신학회논문지
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• 제14권3호
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• pp.559-572
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• 2019

한반도 동해 남부해역은 매년 하계에 집중적으로 냉수대가 형성되어 빈번한 이상해황이 발생한다. 동해안에 발생하는 냉수대는 바람의 영항을 지배적으로 받는데 남풍계열의 바람이 3일에서 7일 이상 지속적으로 불어오는 경우 발생한다. 본 연구에서는 냉수대의 발생과 변화 및 Cochlodinium polykrikoides 적조와의 상관성을 분석하기 위하여 기상청, 한국수력원자력, 해양조사원의 부이의 수온과 풍향 및 풍속, COMS/GOCI의 클로로필 자료, 바람자료와 NOAA에서 제공하는 GHRSST Level 4 SST, 국립수산과학원의 적조속보자료를 활용하였다. 동해안 연안용승시 용승된 수괴는 해류를 따라 북쪽으로 이동하는 특성을 보이며 수괴를 따라 고농도의 클로로필이 형성되는 특성을 보였다. 남쪽의 동한난류의 세력이 강하게 형성될 때 적조가 북상하는 특성을 나타내었다.

• Journal of Animal Science and Technology
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• 제64권6호
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• pp.1237-1244
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• 2022

Horse breeders suffer massive economic losses due to dystocia, abortion, and stillbirths. In Thoroughbred mares, breeders often miss the foaling process because approximately 86% of the foaling events occur from 19:00 to 7:00; consequently, breeders cannot assist mares experiencing dystocia. To solve this problem, various foaling alarm systems have been developed. However, there is a need to develop a new system to overcome the shortcomings of the existing devices and improve their accuracy. To this end, the present study aimed to (1) develop a novel foaling alarm system and (2) compare its accuracy with that of the existing Foalert^TM system. Specifically, eighteen Thoroughbred mares (11.9 ± 4.0 years old) were included. An accelerometer was used to analyze specific foaling behaviors. Behavioral data were transmitted to a data server every second. Depending on the acceleration value, behaviors were automatically classified by the server as categorized behaviors 1 (behaviors without change in body rotation), 2 (behaviors with sudden change in body rotation, such as rolling over), and 3 (behaviors with long-term change in body rotation, such as lying down laterally). The system was designed to alarm when the duration of categorized behaviors 2 and 3 was 12.9% and that of categorized behavior 3 was 1% during 10 min. The system measured the duration of each categorized behavior every 10 min and transmitted an alarm to the breeders when foaling was detected. To confirm its accuracy, the foaling detection time of the novel system was compared with that of Foalert^TM. The novel foaling alarm system and Foalert^TM alarmed foaling onset respectively 32.6 ± 17.9 and 8.6 ± 1.0 min prior to foal discharge, and the foaling detection rate of both systems was 94.4%. Therefore, the novel foaling alarm system equipped with an accelerometer can precisely detect and alert foaling onset.

• 한국임상약학회지
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• 제32권3호
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• pp.260-269
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• 2022

Background: Comprehensive medication management is essential to achieve safe and optimal drug use for the elderly in long-term care facilities (LTCF). This study aimed to develop eligibility criteria for "Comprehensive medication management program in LTCF" using the RAND/UCLA Appropriateness Method (RAM). Furthermore, we attempted to estimate the number of beneficiaries who met the criteria by analyzing the National Health Insurance claims data. Methods: Twelve criteria were selected initially. We composed a panel of 14 experts with expertise in long-term care. We conducted two survey rounds to reach a consensus. Rating for appropriateness and decision regarding agreement were applied per RAM. We analyzed the National Health Insurance data to estimate the number of LTCF residents who met each eligibility criterion. Results: Of the 11 items agreed upon, ten items were determined to be appropriate. In 2018, 83.6% of 165,994 residents of LTCF met one or more eligibility criteria. The largest number of subjects met the "New residents of LTCF" criterion, followed by "Take high-alert drugs" and "Chronic excessive polypharmacy." Since the items evaluated as most appropriate by the expert panel and those with a large number of subjects were similar, we confirmed the external validity of our criteria. Conclusion: It is worth noting that this is the first attempt to establish the eligibility criteria for medication management in LTCF. Further preliminary research is needed to identify the selected subjects' drug-related problems and revise the criteria according to the results.

• 한국인터넷방송통신학회논문지
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• 제24권3호
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• pp.49-53
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• 2024

해양 안전은 바다에서의 사고로부터 인명을 보호하고, 보다 안전한 해양 환경을 조성하는 데 중요한 요소다. 본 연구에서는 해양 안전을 향상시키기 위한 TPMS 디바이스를 개발하고, 이를 통해 바다에서의 사고 상황을 감지하고 신속한 대응을 가능케 하는 기술적 솔루션을 제시한다. 이를 위해 개발한 튜브 압력 측정 시스템(TPMS)을 활용하여 튜브의 팽창을 감지하고, 실시간으로 데이터를 수집하여 주변 기기와 통신함으로써 빠른 대응이 가능하도록 설계되었다. 실험 결과를 통해 TPMS(Tube Pressure Monitoring System)가 효과적으로 압력을 감지하고, Main IoT 디바이스와 통신하며 안정적인 데이터 송수신이 가능함을 확인하였다. 또한 비상 상황에 빠르게 대응할 수 있도록 비상 상황 알림 메시지를 수신하고 정보를 조회할 수 있는 모바일 앱을 개발하였다. 개발한 디바이스와 모바일 앱은 해양 안전 분야뿐만 아니라 다양한 응용 분야에서도 활용 가능한 기술을 포함하고 있으며, 향후에는 실제 현장에서의 적용 가능성을 확대할 것이다. 이러한 결과는 해양 환경의 안전성을 높이는 데 기여할 것으로 기대된다.