• 폴리머
• /
• 제36권5호
• /
• pp.549-554
• /
• 2012

난연제 triphenyl phosphate는 HDPE(high-density polyethylene)/EPDM(ethylene-propylene diene monomer)/boron carbide 내에서 miscibility가 좋지 못하여 고분자의 기계적 물성을 크게 저하시킨다. HDPE/EPDM/boron carbide/triphenyl phosphate 블렌드의 분산성을 향상시키기 위해서 상용화제로 PE-g-MAH(polyethylene-graft-maleic anhydride)를 사용하여 블렌딩하였다. Triphenyl phosphate 함량이 증가할수록 인장강도를 크게 저하시킴을 확인하였다. 하지만 상용화제 첨가로 인하여 기계적 물성이 향상되는 것을 확인하였다. Triphenyl phosphate의 분산성의 향상은 SEM 분석을 통해서 확인하였다. HDPE/EPDM/boron carbide/triphenyl phosphate의 내열성과 난연성을 측정하기 위해서 TGA 분석과 LOI 분석을 진행하였다. 분산성이 향상됨에 따라서 triphenyl phosphate 첨가제의 기본적인 특성인 내열성과 난연성이 향상되었으며, 그 결과로 자기 소화성인 21% 이상의 한계산소지수(LOI)를 가지는 HDPE/EPDM/boron carbide/triphenyl phosphate 블렌드를 얻을 수 있었다.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2015년도 제46회 하계학술대회
• /
• pp.581-582
• /
• 2015

Energy management system (EMS)는 전력시스템에서 운영자에 의해 발전과 송전의 성능을 감시, 제어, 그리고 성능 최적화를 위하여 운영하는 시스템이다. 본 연구에서는 차세대 EMS(Next Generation Energy Management System : NG-EMS)에서 클라이언트 운영 시스템의 자동 동기 방법을 제안한다. 인트라넷 네트워크 망에서 클라이언트 운영 시스템의 효율적인 유지 보수를 위해 운영 소프트웨어 패치 및 엔지니어링을 통해 만들어진 그래픽 화면을 여러 클라이언트에 자동 동기 및 갱신 기능을 특징으로 한다. 또한 자동 동기 빌더를 이용하여 클라이언트에 동기 할 항목을 패키징하는 기능을 포함한다. 본 연구의 구성에 의해 자동 동기 서버 측에서 클라이언트의 동기 및 갱신주기를 효율적으로 관리하다. 클라이언트가 메인으로 접속하여 자동동기 상태를 체크하는 서버에 문제가 발생했을 경우 다중 동기 서버 형태로 운영하여 만일에 발생할 문제에 효율적으로 대처가 가능하다.

• 설비공학논문집
• /
• 제27권1호
• /
• pp.39-43
• /
• 2015

The Energy and Green House Gas target management system was launched by the Korean Government in 2010. The Korea Emission Trading System will start in 2015. Therefore, simultaneous pursuit of energy saving and greenhouse emission reduction through energy use rationalization is an important obligation of Korean engineers, who import about 97% of domestic energy consumption. Economic analysis of the GHG emission reduction methodologies registered and approved by Korea Voluntary Emission Reduction (KVER) program was conducted. The results for waste heat recovery employed in an energy intensive pulp, paper and wood industry were reported. The emission reduction intensities were 9.7 kg $CO_2$/ton_pulp production. Net Present Value analysis showed that the GHG emission reduction was economically beneficial with an internal rate return of 60%. The results of exergy analysis indicated that the second law efficiencies of waste heat recovery system employed in KVER program were 77.3% and 53.6%. NPV decreased as the exergy decreased.

• 방사선산업학회지
• /
• 제7권1호
• /
• pp.75-80
• /
• 2013

This study was designed to elucidate the effect of fermented blackberry drinks (BD) on alcohol metabolism and hangover in alcohol-treated rats. We showed that the administration of BD increased the activity of alcohol dehydrogenase (ADH) and aldehyde dehydrogenase (ALDH) in alcohol-treated rats. Moreover, the administration of BD reduced the serum alcohol and acetaldehyde concentrations in alcohol-treated rats. Furthermore, the administration of BD attenuated the levels of serum aspartate aminotransferase and alanine aminotransferase in alcohol-treated rats. Taken together, these results suggest that BD plays an important role in alcohol metabolism and liver function by reducing blood alcohol and acetaldehyde through the activation of ADH and ALDH in alcohol-treated rats and could be used as a functional anti-hangover drinks.

• 공업화학
• /
• 제34권3호
• /
• pp.241-246
• /
• 2023

Fuel cells are one of the renewable energy sources that have sparked a lot of scientific attention for solving problems related to the energy crisis and environmental pollution. One of the most crucial subjects concerning the utilization of fuel cells is modeling. Therefore, an analytical steady-state and dynamic fuel cell model was described in this study. The parameter for the identification process was investigated, and the MATLAB/Simulink implementation was demonstrated. A 15-W proton exchange membrane fuel cell was used to apply the suggested modeling methodology. Comparing experimental and simulation findings indicated that the model error was constrained to 3%. This study showed that temperature and humidity affect fuel cell performance.

• 멤브레인
• /
• 제17권1호
• /
• pp.1-13
• /
• 2007

분리막을 이용한 투과증발공정은 에너지 소모가 적고 설치비와 운영비면에서 우수한 효과를 볼 수 있기 때문에 증류공정을 대신할 수 있는 공정으로 주목받고 있다. 특히 석유화학공정은 공정 중에 에너지 소모가 크고, 많은 화합물들이 공비혼합물을 이루고, 새로운 공정을 설치하기 위해서는 작은 공간을 필요로 하기 때문에 투과증발공정은 증류공정을 대체할 수 있는 매우 유력한 후보이다. 벤젠/시클로헥산을 포함하는 방향족 화합물의 분리, 올레핀/파라핀 분리, 자일렌 이성질체의 분리, 반응성 단량체의 회수, 가솔린으로부터 황 화합물의 제거 등에 투과증발공정을 응용하는 많은 연구가 이루어졌으며, 상용화가 되고 있다.

• Asian-Australasian Journal of Animal Sciences
• /
• 제31권9호
• /
• pp.1481-1490
• /
• 2018

Objective: The objective of this experiment was to determine the net energy (NE) content of full-fat rice bran (FFRB), corn germ meal (CGM), corn gluten feed (CGF), solvent-extracted peanut meal (PNM), and dehulled sunflower meal (SFM) fed to growing pigs using indirect calorimetry or published prediction equations. Methods: Twelve growing barrows with an average initial body weight (BW) of $32.4{\pm}3.3kg$ were allotted to a replicated $3{\times}6$ Youden square design with 3 successive periods and 6 diets. During each period, pigs were individually housed in metabolism crates for 16 d, which included 7 days for adaptation. On d 8, the pigs were transferred to the respiration chambers and fed one of the 6 diets at 2.0 MJ metabolizable energy (ME)/$kg\;BW^{0.6}/d$. Total feces and urine were collected and daily heat production was measured from d 9 to d 13. On d 14 and d15, pigs were fed at their maintenance energy requirement level. On the last day pigs were fasted and fasting heat production was measured. Results: The NE of FFRB, CGM, CGF, PNM, and SFM measured by indirect calorimetry method was 12.33, 8.75, 7.51, 10.79, and 6.49 MJ/kg dry matter (DM), respectively. The NE/ME ratios ranged from 67.2% (SFM) to 78.5% (CGF). The NE values for the 5 ingredients calculated according to the prediction equations were 12.22, 8.55, 6.79, 10.51, and 6.17 MJ/kg DM, respectively. Conclusion: The NE values were the highest for FFRB and PNM and the lowest in the corn co-products and SFM. The average NE of the 5 ingredients measured by indirect calorimetry method in the current study was greater than values predicted from NE prediction equations (0.32 MJ/kg DM).

• 한국산업융합학회 논문집
• /
• 제15권4호
• /
• pp.95-101
• /
• 2012

In order to explain observed catalytic reactivity of aminophosphine complexes (seven-membered chelate), total energy, net charge, atomic orbital electron population, HOMO and LUMO energy of free ligands are calculated by PM3 methods of HyperChem 6.0. Free ligands are 1,2-bis{(diphosphino)amino}propane{$H_2PNHCH_2CH(CH_3)NHPH_2$;ligand 1},1,2-bis{(dimenylphosphino)amino}propane{$(CH_3)_2PNHCH_2CH(CH_3)NHP(CH_3)_2$;ligand 2},1,2-bis{(diphenylphosphino)amino}propane{$(C_6H_5)_2PNHCH_2CH(CH_3)NHP(C_6H_5)_2$;ligand 3}. The result showed that ligand 3 is stable than ligand 2 and ligand 1 and ligand 2 is stable than ligand 1 in total energy. Net charge of P atom is changed by H atom, methyl groups and phenyl groups in P atoms. Net charge of N atoms in ligands is nagative. The results of atomic orbital electron population are similar net charge data..

• 디지털산업정보학회논문지
• /
• 제15권3호
• /
• pp.37-44
• /
• 2019

In this study, we propose the automatic extraction method of Rescue Requests from Drone Images. A central object is extracted from each image by using central object extraction method[7] before classification. A central object in an images are defined as a set of regions that is lined around center of the image and has significant texture distribution against its surrounding. In this case of artificial objects, edge of straight line is often found, and texture is regular and directive. However, natural object's case is not. Such characteristics are extracted using Edge direction histogram energy and texture Gabor energy. The Edge direction histogram energy calculated based on the direction of only non-circular edges. The texture Gabor energy is calculated based on the 24-dimension Gebor filter bank. Maximum and minimum energy along direction in Gabor filter dictionary is selected. Finally, the extracted rescue requestor object areas using the dominant features of the objects. Through experiments, we obtain accuracy of more than 75% for extraction method using each features.

• Transactions on Electrical and Electronic Materials
• /
• 제2권2호
• /
• pp.1-4
• /
• 2001

Urgency of using plasma-energy technologies in power industry, is outlined, increasing of economical efficiency, decreasing of energy consumption and decreasing of environmental pollution, are shown, scientific and technical bases for plasma-energy technologies of fuel utilisation, are designed, results of theoretical, experimental and rig investigations of processes of plasma ignition, gasification, thermochemical preparation for burning and combined processing of coals, are presented, results of realisation of plasma technologies of residual-oil-free (mazout) pulverised-coal boiler kindling, lighting of torch and stabilisation of luid slagging in furnaces with removal of fluid slag, are described.