Epidemiological Characteristics and Risk Factors of Dengue Infection in Korean Travelers

제승모,배원준,김지연,석승혁,황응수 대한의학회 2016 Journal of Korean medical science Vol.31 No.12

Dengue viral infection has rapidly spread around the world in recent decades. In Korea, autochthonous cases of dengue fever have not been confirmed yet. However, imported dengue cases have been increased since 2001. The risk of developing severe dengue in Korean has been increased by the accumulation of past-infected persons with residual antibodies to dengue virus and the remarkable growth of traveling to endemic countries in Southeast Asia. Notably, most of imported dengue cases were identified from July to December, suggesting that traveling during rainy season of Southeast Asia is considered a risk factor for dengue infection. Analyzing national surveillance data from 2011 to 2015, males aged 20–29 years are considered as the highest risk group. But considering the age and gender distribution of travelers, age groups 10–49 except 20–29 years old males have similar risks for infection. To minimize a risk of dengue fever and severe dengue, travelers should consider regional and seasonal dengue situation. It is recommended to prevent from mosquito bites or to abstain from repetitive visit to endemic countries. In addition, more active surveillance system and monitoring the prevalence asymptomatic infection and virus serotypes are required to prevent severe dengue and indigenous dengue outbreak.

Extent of Mycobacterium bovis infection in dairy cattle herds subject to partial culling as determined by an interferon-gamma assay

제승모,Un-chang Yeo,송택선,Ki-cheol Kim,Sung-Yun Park,Man-Jung Kim,조상래 대한수의학회 2014 Journal of Veterinary Science Vol.15 No.2

The interferon-gamma (IFN-γ) assay is employed as acomplementary diagnostic test for bovine tuberculosis(BTB) in many countries. To simplify this assay, weestablished a 96-well plate format using the ESAT-6 andCFP-10 antigens and then employed it to determine theextent of Mycobacterium (M.) bovis infection in dairy herdswith a history of BTB outbreaks in a country where onlyselective culling is practiced. The sensitivity and specificityof this IFN-γ assay were 85.9% and 100%, respectively,based on comparison with the conventional singleintradermal tuberculin test (SIDT). The IFN-γ assay wasalso positive in 30.4% and 36.8% of SIDT-negative animalsfrom herds with recent and remote BTB outbreaks,respectively. Of 14 SIDT-negative, IFN-γ positive cattle, five(35.7%) were culture positive and an additional six werepositive based on a polymerase chain reaction-based test forM. bovis. Therefore, the IFN-γ assay has the potential toserve as a specific and sensitive test for M. bovis infection indairy cattle. Further, the results indicated that a substantialportion of SIDT-negative animals in herds with previousBTB outbreaks were actually infected with M. bovis. Accordingly, the present selective-culling strategy mayrequire modifications to include this more sensitive assay.

Performance Comparison between WiMAX and WLAN and Construction of Tactical/Strategic Communication Network Using OPNET

제승모 ( Seung-mo Je ),한상훈 ( Sang-hoon Han ),허준호 ( Jun-ho Huh ) 한국정보처리학회 2017 한국정보처리학회 학술대회논문집 Vol.24 No.1

As part of overseas defense program of the US's Trump administration, the military allies were asked to cover partial operation costs for the weaponry deployed at the US bases in their countries. This raised the Korean government's, as well as defense industry's interest in constructing a tactical/strategic communication network and investments are being made actively. Thus, in this study, the performances of WiMAX and WLAN have been compared and a tactical/strategic communication network has been constructed for simulation by using OPNET. As a result, the simulation for the network using combat tanks was successful. An average communication distance that can be achieved by WLAN in open terrain is about 200m as it has been designed on the premise of short-range wireless communications. When the distance was increased to 1km, the tanks could not receive data. By contrast, it was able to confirm that the WiMAX-based network has allowed smooth communications at the same distance. Based on this result, it can be concluded that using WiMAX for tactical operations will have much more merit than adopting WLAN as far as the distance is concerned.

페이스북 ELF - OpenGo를 이용한 바둑 수순 예측 서비스

제승모(Seung-Mo Jea),정도영(Do-Young Jung),전승표(Soung-Pyo Jeon),조연정(Yeon-Jeong Jo),이명준(Myung-Joon Lee) 한국정보과학회 2019 한국정보과학회 학술발표논문집 Vol.2019 No.6

Design and Simulation of a Platform Technology for the Mobile WiMAX-based Micro Grid Home Network System using OPNET Simulation

허준호,제승모,서경룡 사단법인 인문사회과학기술융합학회 2016 예술인문사회융합멀티미디어논문지 Vol.6 No.4

Currently, ICT (Information & Communication Technology), IoT (Internet of Things), Smart Grid and Micro Grid technologies are seen as the technologies that will dominate the IT industry of the Republic of Korea till 2020. There are communication technologies such as Mobile WiMAX, PLC, Zigbee, NFC, ANT, Mobile Wi-Fi, Bluetooth, RFID applicable for Smart Grids but we are proposing a Mobile WiMAX-based Micro Grid Home network system in this paper. As a result of simulation, we were able to confirm that the propose system worked normally. The platform technology used in this study can be used for the Smart Grids and Micro grids, as well as other IoT-applied fields. Also, many other simulations in relation to healthcare, building and facility management, disaster and accident monitoring, weather observation and other areas can be conducted using this platform technology prior to constructing an actual system to save costs by checking system’s feasibility.

Variable number tandem repeat analysis of Mycobacterium bovis isolates from Gyeonggi-do, Korea

전보영,제승모,Jinhee Park,Yeun Kim,Eun-Gae Lee,이혜영,Sangkyo Seo,조상래 대한수의학회 2008 Journal of Veterinary Science Vol.9 No.2

Bovine tuberculosis (TB) is a major zoonosis that's caused by Mycobacterium bovis (M. bovis). Being able to detect M. bovis is important to control bovine TB. We applied a molecular technique, the variable number tandem repeat (VNTR) typing method, to identify and distinguish the M. bovis isolates from Gyeonggi-do, Korea. From 2003 to 2004, 59 M. bovis clinical strains were isolated from dairy cattle in Gyeonggi-do, Korea, and these cattle had tuberculosis- like lesions. Twenty-four published MIRUVNTR markers were applied to the M. bovis isolates and ten of them showed allelic diversity. The most discriminatory locus for the M. bovis isolates in Korea was QUB 3336 (h = 0.64). QUB 26 and MIRU 31 also showed high discriminative power (h = 0.35). The allelic diversity by the combination of all VNTR loci was 0.86. Six loci (MIRU 31, ETR-A and QUB-18, -26, -3232, -3336) displayed valuable allelic diversity. Twelve genotypes were identified from the 59 M. bovis isolates that originated from 20 cattle farms that were dispersed throughout the region of Gyenggi- do. Two genotypes [designation index (d.i.) = e, g] showed the highest prevalence (20% of the total farms). For the multiple outbreaks on three farms, two successive outbreaks were caused by the same genotype at two farms. Interestingly, the third outbreak at one farm was caused by both a new genotype and a previous genotype. In conclusion, this study suggests that MIRU-VNTR typing is useful to identify and distinguish the M. bovis isolates from Gyeonggi-do, Korea.

Design and Simulation of Foundation Technology for Zigbee-based Smart Grid Home Network System using OPNET Simulation

허준호,제승모,서경룡 사단법인 인문사회과학기술융합학회 2015 예술인문사회융합멀티미디어논문지 Vol.5 No.4

The Internet of Things (IoT) and the Smart Grid both are being discussed as the technologies that would dominate Korean IT industry by 2020. The PLC, Zigbee, NFC, ANT, Wi-Fi, Bluetooth and RFID are considered to be the foundation technologies for the Smart Grid and in this paper, we propose a Zigbee-based Smart Grid Home Network System. A comparative analysis has been carried out by performing additional Mobile WiMAX-based simulations with respect to the research paper published in the conference proceedings and we confirmed that all the proposed system worked normally. Although the simulation results showed that the Mobile WiMAX has a better capability than Zigbee, the latter has more advantages in terms of scalability and the possibility of reducing the battery size as it features low-cost and low-power characteristics. As a standard technology for the low-cost and low-power oriented networks, the scalability can be achieved by its low-cost characteristic (i.e., many Zigbee equipments can be installed widely) and the size of battery can be reduced its low-power use characteristic. Considering the operating life, we’ve concluded that Zigbee could be more efficient for certain areas. The proposed foundation technology used for the system in this paper can be adapted to various areas of the IoT. Thus, in this paper, the OPNET Modeler 14.5 PL8, Zigbee-based scenario and WiMAX-based scenario had been used for the designing and simulations of both systems. We expect that it would be possible to apply the technology to a variety of fields of health-care, building and facility management, accident and disaster monitoring and meteorological observation as well.