• 정보처리학회논문지B
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• 제8B권5호
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• pp.469-476
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• 2001

현대사회에서 웹을 통한 정보 제공 서비스가 늘어나면서 병원에서도 홈페이지와 E-mail을 통하여 많은 질문과 상담이 진행되고 있다. 그러나, 이것은 관리자에 대한 업무부담과 답변에 대한 응답시간 지연의 문제가 있다. 본 논문에서는 이런 질의문서에 대한 자동응답시스템의 기초연구로 문서 분류 방법을 연구하였다. 실험방법으로 1200개의 환자질의문서를 대상으로 66%는 학습문서로, 34%는 테스트문서로 활용하여 이것을 NBC(Naive Bayes Classifier), 공통색인어, 연관계수를 이용한 문선분류에 사용하였다. 문서 분류 결과, 기본적인 NBC방법 보다는 본 논문에서 제안한 두 방법이 각각 3%, 5% 정도 더 높게 나타났다. 이러한 색인어의 빈도보다, 색인어와 카테고리간의 연관성이 문서 분류에 더 효과적이라는 것을 의미한다.

• 산업경영시스템학회지
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• 제40권2호
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• pp.60-67
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• 2017

A baggage handling system (BHS) in airport is an unified system for moving the passengers' baggage in designated time. Input baggage from the check-in counter travels to the baggage claim area or cargo handling terminal through this system. In particular, entryway BHS consists of conveyors, X-ray and sorters such as tilt-tray to send the baggage to departing airplane and it could have various problems for handling certain amount of baggage in restricted time such as baggage jamming at certain merge point. This causes systemic error such as delay of the time, omissions of the baggage and even breakdown of the equipment and inefficiency. Also the increasing maximum time of the baggage passing through the BHS could delay the flight schedule and finally decrease the service level. Thus, the algorithm for controlling the flow of the merge is essential to the system. The window reservation algorithm is the one of the most frequently used methods to control the merge configuration. Above all, the reserve location, so called reserve ahead point, that allocates the window is important for the performance of the algorithm. We propose the modified window reservation algorithm and the best reserve locations by changing the reserve ahead point in the induction conveyors. The effect of various reserve ahead points such as the capacity and utility of the system were analyzed and the most effective reserve ahead point combination was found. The total baggage processing time and the utilization of the tilt-tray are properly considered when choosing the optimal Reserve ahead point combination. In the layout of this study, the configuration of four conveyors merged into one tilt-tray is studied and simulation analysis is done by AutoMod(R), 3D simulation software. Through the simulation, the window reservation algorithm is effectively operated with the best combination of reserve ahead point which reduces the maximum baggage travel time.

• Journal of Astronomy and Space Sciences
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• 제34권4호
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• pp.315-330
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• 2017

Halo coronal mass ejections (CMEs) originating from solar activities give rise to geomagnetic storms when they reach the Earth. Variations in the geomagnetic field during a geomagnetic storm can damage satellites, communication systems, electrical power grids, and power systems, and induce currents. Therefore, automated techniques for detecting and analyzing halo CMEs have been eliciting increasing attention for the monitoring and prediction of the space weather environment. In this study, we developed an algorithm to sense and detect halo CMEs using large angle and spectrometric coronagraph (LASCO) C3 coronagraph images from the solar and heliospheric observatory (SOHO) satellite. In addition, we developed an image processing technique to derive the morphological and dynamical characteristics of halo CMEs, namely, the source location, width, actual CME speed, and arrival time at a 21.5 solar radius. The proposed halo CME automatic analysis model was validated using a model of the past three halo CME events. As a result, a solar event that occurred at 03:38 UT on Mar. 23, 2014 was predicted to arrive at Earth at 23:00 UT on Mar. 25, whereas the actual arrival time was at 04:30 UT on Mar. 26, which is a difference of 5 hr and 30 min. In addition, a solar event that occurred at 12:55 UT on Apr. 18, 2014 was estimated to arrive at Earth at 16:00 UT on Apr. 20, which is 4 hr ahead of the actual arrival time of 20:00 UT on the same day. However, the estimation error was reduced significantly compared to the ENLIL model. As a further study, the model will be applied to many more events for validation and testing, and after such tests are completed, on-line service will be provided at the Korean Space Weather Center to detect halo CMEs and derive the model parameters.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2001년도 추계종합학술대회
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• pp.97-100
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• 2001

전기전자 및 산업 장치들까지 네트워크에 접속되는 오늘날의 인터넷 환경에서 다양화 되어가는 인터넷 단말들에 대한 자동주소설정과 인프라망의 자동화가 요구된다. 이와 같은 요구사항을 충족시키기에는 제한된 환경에서 사용되도록 설계된 DHCP, SNMP, CMIP 보다 향상된 프로토콜의 개발 및 표준화가 요구된다. 이를 위해 2000년 3월에 민간 국제 표준화 기구인 IETE에서는 "Zeroconf"라는 워킹그룹을 조직하여 자동차, 기차, 비행기 내에서 한시적으로 구성되는 ad-hoc 망, 정보가전 등의 홈네트워크, 이동망 등 다양한 환경에서 적용될 수 있는 자동네트워킹 표준의 제정을 목표로 활동하고 있다. 본 논문에서는 IPv6 기반 자동네트워킹 기술인 IP 인터페이스 설정, 호스트 이름과 IP 주소 간의 변환, IP 멀티캐스트 주소 할당, 그리고 서비스탐색 기술 등을 소개하고 Zerocof 워킹그룹에서의 표준화 동향을 알아본다. 동향을 알아본다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2016년도 춘계학술대회
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• pp.262-264
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• 2016

일반적으로 타이어의 마모상태를 알기 위해서는 운전자나 정비사가 육안으로 타이어를 확인하거나, 타이어 마모도를 동전으로 측정하는 방법을 이용한다. 이러한 방법은 누구나 쉽게 확인을 할 수 있지만, 육안으로 확인을 하는 것이기 때문에 정확한 마모의 정도의 확인이 어렵다. 정비사의 마모도 측정 기준이 객관적 판단으로 인해 나온 결과가 아니라, 주관적인 판단으로 나온 것이기 때문에 타이어의 안정성을 제대로 측정해줄 수가 없다. 이로 인해 운전자의 사고로 이어질 수 있다. 이러한 단점들을 보완하여 운전자들에게 객관적이고 정확하고 쉽게 타이어를 점검할 수 있는 시스템이 필요하다. 본 시스템은 위에서 언급하는 기능을 가지는 시스템을 구현하였다. 본 시스템은 자동차의 트레드 마모 상태를 확인하기 위한 타이어 표면 데이터 스캐너 모듈과 데이터들을 판단하는 저장부, 사용자가 쉽게 정보들을 확인 할 수 있게 웹서비스로 구성된다.

• 한국해양바이오학회지
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• 제3권1호
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• pp.7-12
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• 2008

Cameroon is a country in Western Africa with 16 million inhabitants. Located between Nigeria and Equatorial Guinea, the country is bordered by the Bight of Biafra. It has a 402 km long coastline. It covers an area of about 475,440 sq km. Cameroon obtains its fish supply from five distinct sources notably-small scale maritime Fisheries, inland fisheries, industrial fisheries, aquaculture and importation. Despite its enormous potential, Cameroon produces only 180,000 metric tons fish annually. The total artisanal annual catch is estimated to be 55,000 t of which bonga/Sardinella, white shrimp and demersal fish contribute 58%, 27% and 15% respectively. The industrial fleet expanded rapidly during the sixties and by 1973 there were 29 trawlers and 13 shrimpers which landed a total of about 17,600 t of fish and shrimp. The total catch of the industrial fisheries peaked at about 20,400 t in 1976 and since then catches have generally declined. The per capita fish consumption in Cameroon stands at about 17.9 kg per inhabitant per year. This means that the demand of fish in Cameroon stands at about 280,000 tons. There is a deficit of in fish supply for which the government always resort to massive importation of fish products to meet the local demand. The main fish product for export from Cameroon is the prawn (Panacus duorarum). The main export market of Cameroon's prawn is the European Union (EU). Between 1998 and 2003, Cameroon's export value has been on the decline, dropping from 1,836 metric tons of prawns for a value of 264 millions USD in 1998 to 51 tonnes, for an estimated value of 315,000 USD in 2003. This drastic drop in exportation is consequential to Cameroon's auto suspension from the exportation of prawns towards the EU as a result of non compliance with EU standards. Today, a good quantity of the catches is being exported illicitly through neighbouring countries.

• 한국멀티미디어학회논문지
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• 제12권8호
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• pp.1099-1108
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• 2009

MANET(Mobile Ad Hoc Network) 상에서 IP주소 할당에 관한 연구는 특정 노드가 다른 노드들의 IP주소를 모니터링 하여 할당하는 Stateful 방식과, 노드 스스로 IP주소를 생성하는 Stateless 방식이 있다. MANET 상의 노드들은 이동성과 제한된 자원의 특성으로 노드 스스로 IP 주소를 생성하는 Stateless 방식이 더 적합하다. 그러나, Stateless 방식에서는 중복되지 않는 주소를 할당하기 위한 DAD(Duplicate Address Detection)과정이 필요하고, 이 과정에서 DoS(Denial of Service) 공격이 발생할 수 있다. 본 논문에서는, MANET의 특성에 맞춰 계산량이 적게 드는 일방향 해쉬 함수를 이용하여, DAD과정에서 발생할 수 있는 DoS 공격을 방지하는 보안 기법을 제안한다. 그리고, NS2를 이용하여 기존의 서명을 이용한 CGA(Cryptographically Generated Addresses) 방식과 비교, 성능평가 한다.

• Clinical and Experimental Pediatrics
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• 제64권4호
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• pp.141-148
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• 2021

There are very scant data on the epidemiology of primary immunodeficiency diseases (PIDs) in Korea. Here we attempted to estimate the PID epidemiology and disease burden in Korea. A systematic review was performed of studies retrieved from the PubMed, KoreaMed, and Google Scholar databases. Studies on PIDs published in Korean or English between January 2001 and November 2018 were analyzed. The number of PID patients and the healthcare costs were estimated from Health Insurance Review and Assessment Service (HIRA) Korea data for 2017. A total of 398 PID patients were identified from 101 reports. Immunodeficiencies affecting cellular and humoral immunity were reported in 11 patients, combined immunodeficiency with associated or syndromic features in 40, predominantly antibody deficiencies in 144, diseases of immune dysregulation in 58, congenital defects of phagocytes in 104, defects in the intrinsic and innate immunity in 1, auto-inflammatory disorders in 4, complement deficiencies in 36, and phenocopies of PID in none. From the HIRA reimbursement data, a total of 1,162 outpatients and 306 inpatients were treated for 8,166 and 6,149 days, respectively. In addition, reimbursement was requested for 8,200 outpatient and 1,090 inpatient cases and $1,924,000 and $4,715,000 were reimbursed in 2017, respectively. This study systematically reviewed published studies on PID and analyzed the national open data system of the HIRA to estimate the disease burden of PID, for the first time in Korea.

• 대한통합의학회지
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• 제6권4호
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• pp.149-169
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• 2018

Purpose : This study was to develop a strategy for modeling future workforce projections to serve as a basis for analyzing annual supply of and demand for physical therapists across the South Korea into 2030. Methods : In-and-out movement model was used to project the supply of physical therapists. The demand was projected according to the demand-based method which consists of four-stages such as estimation of the utilization rate of the base year, forecasting of health care utilization of the target years, forecasting of the requirements of clinical physical therapists and non-clinical physical therapists based on the projected physical therapists. Results : Based on the current productivity standards, there will be oversupply of 39,007 to 40,875 physical therapists under the demand scenario of average rate in 2030, undersupply of 44,663 to 49,885 under the demand scenario of logistic model, oversupply of 16,378 to 19,100 under the demand scenario of logarithm, and oversupply of 18,185 to 20,839 under the demand scenario of auto-regressive moving average (ARIMA) model in 2030. Conclusion : The result of this projection suggests that the direction and degree of supply of and demand for physical therapists varied depending on physical therapists productivity and utilization growth scenarios. However, the need for introduction of a professional physical therapist system and the need to provide long-term care rehabilitation services are actively being discussed in entering the aging society. If community rehabilitation programs for rehabilitation of disabled people and the elderly are activated, the demand of physical therapists will increase, especially for elderly people. Therefore, healthcare policy should focus on establishing rehabilitation service infrastructure suitable for an aging society, providing high-quality physical therapy services, and effective utilization of physical therapists.

• International Journal of Advanced Culture Technology
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• 제10권3호
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• pp.146-155
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• 2022

The purpose of this study is to investigate the recyclability of Shenlong in China using SWOT. The main analysis results are as follows. First, provided that the company's current capacity utilization rate is seriously insufficient, reducing staff is one among the effective ways. Second, Shenlong should open a web store to cater to young people's online shopping behavior, and further expand the brand visibility using national mainstream media and online shopping platforms like Taobao and JingDong to market Dongfeng Peugeot and Dongfeng Citroen on the whole network. Third, under the premise of maintaining the present best-selling models, Shenlong should appropriately reduce the amount of models, adjust the assembly capacity ratio of every model and every displacement in real time per the newest market trends, increase the agility of auto companies' production, and timely meet the wants of domestic consumers. Fourth, dual-brand coordination and channel integration are very necessary, and also the profitability and profitability of dealers are going to be further improved, thereby increasing sales. Fifth, target building new energy leading products of Shenlong, strive to attain the forefront of the industry within the sales of recent energy vehicles within 5 years, and gradually expand new energy vehicle products from passenger vehicles to passenger vehicles and commercial vehicles. Finally, the marketing field of Shenlong Automobile should achieve "three major changes", that is, change from a goal-driven type to a demand-driven type, cancel the bundling of outlet invoicing goals and delivery incentive tiers; start from basic capabilities, and set pragmatic and challenging goals; focus Channels, to realize following the activation of outlets, and single store sales increase.