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바실러스 공정 분뇨처리 슬러지를 이용한 음식폐기물 악취제거
정병기 ( Byeong Gi Jung ),성다해 ( Da Hae Seong ),빈정인 ( Jung In Bin ),이병헌 ( Byung Hyun Lee ) 한국수처리학회 2014 한국수처리학회지 Vol.22 No.5
Odor from food waste have an aesthetic effect on neighboring residents. Therefor it has been continued effort to reduce the problem. The purpose of this study was to decrease food waste odor by using nightsoil treatment sludge including Bacillus (SB). Statistical method by Minitab software was used for effective experiment plan and describing the result. Surface response methods with central composite design (CCD) was used for implementing. Utilizing CCD, one of the experimental design, the impact of three variables such as temperature, time and SB was estimated. Statistical analyses (analysis of variance, ANOVA) of the results showed that three variables influenced reduction of food waste odor (p<0.05). The coefficient of determination (R2) for odor reduction was calculated to be 0.9613, indicating that 96.13% of the variation was explained by the model. Through the analysis, input concentration of SB was found to be the most significant factors and followed by time and temperature.
미디어소비자의 여가 가치관이 TV스포츠중계 시청태도 및 시청행동에 미치는 영향
최종필(Choi Jong-Pill),정병기(Jung Byung-Gi) 한국체육과학회 2006 한국체육과학회지 Vol.15 No.4
The purpose of this study is to find out the effects of media consumer characteristics on the attitude toward viewing of TV sports programs and TV sports program viewing behavior. The subjects of this study are college students. From the students attending 4 year universities in Seoul and Gyeonggi area, a population was selected For 5 days between Mar 13th and 17th 2006, 110 questionnaires were distributed to each of 5 universities through cluster sampling. 504 valid samples were collected. The collected data were analyzed using frequency analysis, cross tabulation analysis, factor analysis and multiple linear regression analysis. The results are as follows. First, college students' favorite TV sport program was soccer(67.3%), and their favorite sports channel was MBC(29.2%). The most frequently cited reason for watching sports on TV was to obtain sports information(75%). And the most frequently cited attraction of watching sports on TV was excitement(54.8%). Second, the effect of the consumers' view on leisure on the attitude toward viewing of TV sports programs was not statistically significant. Third, the effect of the consumers' view on leisure on the companion group factor of TV sports program viewing behavior was statistically significant.
차기 군 위성통신망 체계에서 이기종 단말 운용을 고려한 전력제어 기반 MF-TDMA 자원할당 기법
우순(Soon Woo),박형원(Hyung-Won Park),이호섭(Ho-Sub Lee),유연상(Youn-Sang Yoo),정병기(Byung-Gi Jung) 한국통신학회 2012 韓國通信學會論文誌 Vol.37 No.11(융합기술)
본 논문에서는 차기 군 위성통신망 체계에서 서로 다른 통신 능력을 갖는 이기종 단말을 동일 중계기 대역 폭내에서 효과적ξ로 통합하여 운용하기 위해 전력제어 를 적용한 MF-TDMA 자원할당기볍을 제안한다. 제안하는 알고리즘은 burst 크기 결정 단계와 burst 구조 결정단계의 2 단계로 수행된다 먼저 burst 크기 결정 단계에서는 각 단말의 채널 상태를 기반으로 렁크 버짓을 분석 하여 적용 가능한 ACM 레벨과 이에 띠론 burst 크기 를 결정 한다 다음으로 burst 구조 결정단계 에서 는 앞서 도출된 각 단말 별 burst 크기를 기반으로 시간-주파수 축 상에서 할딩가능한 burst 구조를 도출하고 각 구조 별 가용 Power spectral density(PSD) 구간을 계산한다. 이기 종 단말을 단일 중계기로 통합하기 위해 각 burst의 가용 PSD 구간 내에서 전력제어 를 수행하며, 동일 PSD 구간을 갖는 burst를 그룹화하여 MF-TDMA 프레임 내에 할딩-한다. 추가적으로 할당되지 못하고 남는 슬롯에 대한 자원할당 효율을 횡탱시키기 위해 설정된 PSD 구간 내에서 ACM 레벨을 조절하여 빈 슬롯을 활용할 수 있는 방얀을 적용하였다 제안하는 알고리즘은 주피수 사용효율, 슬롯할당 거부율 및 burst packing 효율 측면에서 기 존 방식과 비교하였으며, 기존 방식에 비해 우수한 성능을 제공함을 확인하였다. In this paper, an efficient power control based MF-TDMA resource allocation scheme is proposed for next generation military satellite communication systems. The proposed scheme has the flexibility is used to support heterogeneous terminals with differ in transmission capabilities. The method can be divided into two parts burst size calculation and burst structure determination. At flrst, we estimate the link budget taken into account a dynamic satellite link state variation. Then, applicable ACM level and burst size is chosen. In burst structure determination phase, we reorgallIze the burst structure in time-frequency domain by controlling limited power, bandwidth, time resources. In particular, we compensate the power spectral density among different terminals to integrate them in same transponder, Furthermore, we increase the pac싸ng efficiency by controlling the ACM level of the burst in applicable power spectral density range. Simu\ation resu\ts show that the method increase the specσal efficiency and burst packing efficiency. In addition, slot allocation rejection ratio is successfully reduced.