• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.156-156
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• 2022

• 한국환경보건학회지
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• 제47권4호
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• pp.303-309
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• 2021

Background: Humidifier disinfectant is a biocidal product used in the water tanks of humidifiers to prevent the growth of microorganisms. Although there are a huge number of cases of reported humidifier disinfectant-related health effects across the entire Korean population, their numbers are distributed differently depending on the region. Objectives: This study aimed to investigate the regional distribution of enrollment cases who reported humidifier disinfectant-related health effects. Methods: This study used data on 6,240 subjects who experienced humidifier disinfectant-related health effects and who enrolled their cases which is conducted by the Korea Ministry of Environment. We examined the regional distribution of the enrolled cases based on sixteen administrative divisions and assessed the: 1) crude number; 2) proportional rate; and 3) age-standardized proportional rate of enrollment by region. Results: When we examined the crude number of enrollments by region, the highest number were in Gyeonggi-do Province (n=1,896), followed in order by Seoul (n=1,405), Incheon (n=436) Busan, Daegu, Gyeongsangnam-do Province, Daejeon, Chungcheongnam-do Province, Gyeongsangbuk-do Province, Jeollabuk-do Province, Gwangju, Chungcheongbuk-do Province, Gangwon-do Province, Jeollanam-do Province, Ulsan, and Jeju-do. When we examined proportional rate of the regional enrollment (cases per 100,000 population), Daejeon (n=16.2) was the region with the highest rate, followed in order by Gyeonggi-do Province (n=16.1), Incheon-do Province (n=15.9), Seoul, Daegu, Gwangju, Jeollabuk-do Province, Chungcheongnam-do Province, Busan, Chungcheongbuk-do Province, Gangwon-do Province, Gyeongsanbuk-do Province, Gyeongsangnam-do Province, Ulsan, Jeju-do, and Jeollanam-do Province, which is inconsistent with the order in terms of crude numbers. However, when we examined the age-standardized proportional rate of regional enrollment (cases per 100,000 population), their ranked distribution is consistent with the crude rate. Conclusions: This study observed that the regional distribution of the enrolled cases who reported humidifier disinfectant-related health effects is inconsistent with the regional distribution of the proportional rate of enrollment cases, which may be caused in part by the volume of the inherent population of each region.

• Journal of Oral Medicine and Pain
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• 제15권1호
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• pp.91-104
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• 1991

After alkaline slab polyacrylamide gel electrophoresis and 3.3'-DMB staining of parotid saliva from 48 peoples in Ullung-do and 35 peoples in Jawall-do, the author have got following conclusions. 1. The gene frequencies of Proline-rich protein in Ullung-do were Pr1 =0.719, Pr2=0.281 2. The gene frequencies of Proline-rich protein in Jawall-do were Pr1=0.671, Pr2=0.329 3. The gene frequencies of Double band protein in Ullung-do were Db+=0.087, Db-=0.913 4. The gene frequencies of Double band protein in Jawall-do were Db+=0.0.106, Db-=0.0.894 5. The gene frequencies of Pa protein in Ullung-do were Pa+=0.179, Pa-=0.821 6. The gene frequencies of Pa protein in Jawall-do were Pa+=0.167, Pa-=0.833 7. The gene frequencies of Pr1 of Ullung-do and jawall-do were lower than those of Pr1 in Seoul and Onyang, but similar to those of Pr1 in kangnung and Cheju. 8. The gene frequencies of Db- of Ullung-do and Jawall-do were much higher than those of Db+ in Japanese, Chinese and other populations in Korean.

• Journal of Communications and Networks
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• 제4권4호
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• pp.336-343
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• 2002

A major challenge for next generation mobile communication is capturing the system architecture’s complexity with all its internal and external dependencies. Seamless integration of heterogeneous environments in all system parts is a key requirement. Moreover, future systems have to consider the different evolution cycles of individual system parts. Among those, services are expected to change the fastest. With respect to these considerations, we propose an overall architecture for next generation mobile communication systems. It covers all system parts from wireless transmission to applications including network and middleware platform. Our approach focuses on adaptability in terms of recon- figurability and programmability to support unanticipated system evolution. Therefore, we consider abstraction layers which consist of adaptable cooperating components grouped by open platforms rather than rigid system layers. In addition to that, we introduce cross-layer cooperation allowing an efficient use of the available resources. Specific scenarios illustrate the feasibility of our approach.

• 한국해안·해양공학회논문집
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• 제33권6호
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• pp.238-245
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• 2021

본 연구에서는 LSTM 모델을 활용하여 낙동강 하구역의 DO 농도 예측을 위한 최적 모델 조건과 적합한 예측변수를 찾기 위한 Case study를 수행하였다. 모델 매개변수 case study 결과, Epoch = 300과 Sequence length = 1에서 상대적으로 높은 정확도를 보였다. 예측변수 case study 결과, DO와 수온을 예측변수로 했을 때 가장 높은 정확도를 보였으며, 이는 DO 농도와 수온의 높은 상관성에 기인한 것으로 판단된다. 상기 결과로부터 낙동강 하구역의 DO 농도 예측에 적합한 LSTM 모델 조건과 예측변수를 찾을 수 있었다.

• 방송공학회논문지
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• 제25권2호
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• pp.185-191
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• 2020

MPEG-I에서는 최대 6자유도(6DoF)를 가지는 몰입형 비디오의 압축 표준화를 진행하고 있다. 360 비디오에 움직임 시차(parallax)를 추가한 것으로 정의되는 3DoF+ 비디오의 가상 공간에서, 원하는 위치와 시점의 장면을 제공하려면 3DoF+ 비디오를 구성하는 여러 뷰(view) 비디오를 사용하여 임의의 원하는 시점의 뷰를 렌더링해야 한다. MPEG-I 비쥬얼 그룹에서는 이러한 3DoF+ 비디오의 효율적인 부호화를 위한 표준화가 진행되고 있으며, TMIV(Test Model for Immersive Video)라는 시험모델을 개발하고 있다. 본 논문은 TMIV에서 패치(patch)를 아틀라스(atlas)에 효율적으로 패킹하여 부호화 성능을 향상시킬 수 있는 패치 패킹 방법을 제안한다. 제안기법은 패킹되는 패치들 간에 보호대역(guardband)을 적용하여 패치 간의 거리를 둠으로써 부호화로 인해 발생할 수 있는 아티팩트(artifact)를 줄여 최종 복원 뷰의 화질을 향상시킨다.

• 정보보호학회논문지
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• 제18권1호
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• pp.59-65
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• 2008

CDMA2000 1x EV-DO 에서의 보안 계층은 현재 3GPP2를 통해 표준화 규격(C.S0024-A v2.0)을 완성해 나가고 있는 중이다. 이에 따라 CDMA2000 1x EV-DO 환경의 AT(Access Terminal)와 AN(Access Network) 간 전송되는 데이터에 대한 보안 기능을 적용하기 위하여 표준 문서에 명시된 보안 계층 구현에 필요한 보안 장치가 요구되고 있다. 본 논문은 3GPP2의 C.S0024-A v2.0 표준을 준용한 CDMA2000 1x EV-DO 보안계층 설계 및 구현을 통해 AT와 AN간의 안전하고 빠른 데이터 전송 및 다양한 플랫폼 환경에 적용 가능한 보안계층 시스템을 실제 적용했다.

• Biotechnology and Bioprocess Engineering:BBE
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• 제11권3호
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• pp.245-250
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• 2006

The effects of aliphatic hydrocarbons (n-hexadecane and n-dodecane) on the volumetric oxygen mass transfer coefficient $(k_L\;a)$ were studied in flat alveolar airlift reactor and continuous stirred tank reactors (CSTRs). In the flat alveolar airlift reactor, high aeration rates (>2vvm) were required in order to obtain efficient organic-aqueous phase dispersion and reliable $k_La$ measurements. Addition of 1% (v/v) n-hexadecane or n-dodecane increased the $k_La$ 1.55- and 1.33-fold, respectively, compared to the control (superficial velocity: $25.8{\times}10^{-3}m/s$, sparger orifice diameter: 0.5 mm). Analysis of the gas-liquid interfacial area a and the liquid film mass transfer coefficient $k_L$ suggests that the observed $k_La$ increase was a function of the media's liquid film mass transfer. Addition of 1% (v/v) n-hexadecane or n-dodecane to analogous setups using CSTRs led to a $k_La$ increase by a factor of 1.68 and 1.36, respectively (superficial velocity: $2.1{\times}10^{-3}m/s$, stirring rate: 250 rpm). These results propose that low-concentration addition of oxygen-vectors to aerobic microbial cultures has additional benefit relative to incubation in purely aqueous media.

• Animal Bioscience
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• 제36권1호
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• pp.119-131
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• 2023

Objective: This study was to assess the effects of different doses of an essential oil blend (EOB) on growth performance, diarrhea occurrence (DO), hematological and blood biochemical profile, intestinal morphometry, morphology and microbiology, relative weight and length of organs, digestive content pH, and liver antioxidant status in weaning piglets. Methods: A total of 135 barrows (7.09±0.29 kg body weight) were allotted randomly in a randomized complete block design based on body weight with nine replications and three animals per pen. Dietary treatments were a negative control (NC): basal diet; positive control (PC): NC plus 125 mg performance-enhancing antibiotic (enramycin 8%)/kg diet; NC plus 100 mg EOB/kg diet (EO100); NC plus 200 mg EOB/kg diet (EO200); and NC plus 400 mg EOB/kg diet (EO400). Diarrhea occurrence was monitored daily, and performance at the end of each phase. Results: Gain to feed ratio was greater (p<0.05) in starter II pigs fed EO400 and EO200 than in those fed EO100. Pigs fed EO400 had lower (p<0.05) DO than those fed NC and EO100 in the total period. Pre-starter II pigs fed NC had (p<0.05) lower serum total protein and plasma protein than pigs fed PC. Pigs fed EO100 showed smaller (p<0.05) mean corpuscular volume (MCV) than pigs fed EO400. Starter II pigs fed EO400 had (p<0.05) greater MCV and lower mean corpuscular hemoglobin and erythrocytes than those fed EO100. There was a greater concentration (p<0.05) of band cells for PC, similar to EO400 and EO200. Performance-enhancing antibiotic and EOB to diets increased (p<0.05) liver superoxide dismutase activity. Conclusion: Adding 200 and 400 mg EOB/kg diet decreased DO and was advantageous to hematological and blood biochemical profile and liver antioxidant status without being detrimental to growth performance and gastrointestinal health in nursery pigs.

• 시스템엔지니어링학술지
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• 제11권1호
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• pp.33-39
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• 2015

This paper describes a development of aircraft carrier aviation support system architecture using DoDAF. The aircraft carrier, a warship performing a role of mobile sea air base in offensive and defense mission, is super system that is comprised of carrier itself and carrier-based airwing. Performing critical role in step with aviation operations in carrier-airwing interactions, the aviation support system of aircraft carrier is also system of systems. It requires a complex and integrated approach based on systems engineering in establishing concept of this complex systems. In this view, this study establishes an operational scenario and derives operational requirements by identifying aviation operations environment on deck of aircraft carrier. The study presents the operational architecture of the carrier aviation support system by using DoDAF and CASE tool CORE.