• Proceedings of the Korea Information Processing Society Conference
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• 2023.05a
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• pp.534-535
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• 2023

최근 CNN 기반 객체인식 시스템은 고정밀도 모델을 기반으로 정확도를 높이고 있다. 하지만 고정밀도 모델일수록 모델의 크기가 늘어나고 더 많은 하드웨어 자원을 필요로 한다. 따라서 모델 경량화 기술이 많이 연구되고 있으며, 그 중에 대표적인 경량화 기술이 양자화 기술이다. 양자화 기술은 파라미터의 크기와 연산 오버헤드를 줄이지만, 정확도 역시 줄어들게 된다. 영자화와 정확도의 상관관계를 분석하기 위해서 본 논문에서는 INT8 과 FP32 을 이용한 Mixed precision CNN 을 실행시키기 위한 프레임워크를 구성하고, 임베디드 시스템 환경에서의 INT8 연산에 기반하여 맞추어 각 layer 별 Mixed Precision 연산을 수행하여 보고, 모델의 정확도를 측정하여 분석하여 보았다.

• Korean Journal of Metals and Materials
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• v.50 no.3
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• pp.218-223
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• 2012

Fe-(8.5, 18.5, 28.3, 36.9) wt% Cr alloys were corroded between 600 and $800^{\circ}C$ for up to 70 h in a 1 atm gas mixture that consisted of 0.0242 atm of $H_2S$, 0.031 atm of water vapor, and 0.9448 atm of nitrogen gas. Their corrosion resistance increased with an increment in the Cr content. The Fe-8.5%Cr alloy corroded fast, forming thick, fragile, nonadherent scales that consisted primarily of an outer FeS layer and an inner (Fe, Cr, O, S)-mixed layer. The outer FeS layer grew into the air by the outward diffusion of $Fe^{2+}$ ions, whereas the inner mixed layer grew by the inward diffusion of oxygen and sulfur ions. At the interface of the outer and inner scales, voids developed and cracking occurred. The Fe-(18.5, 28.3, 36.9)% Cr alloys displayed much better corrosion resistance than the Fe-8.5Cr alloy, because thin $Cr_2O_3$ or $Cr_2S_3$ scales formed.

• Asian Journal of Turfgrass Science
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• v.13 no.4
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• pp.181-190
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• 1999

This study was carried out to survey green system, area, green slope, green turfgrass variety, green section, and particle size of green construction materials, and to investigate and evaluate the characteristics of Design and Construction in Korean golf course green for improving the quality of Korean golf course into that of the international golf course held international tournament. The results were as follows. 1. The greens of 129 Korean golf courses consisted of 2(two) green system and 1(one) green system. 2(two) green system was 50.8%, 1(one) green system was 40.7%, and 1+2 green system was 8.5% of them. 2. In 48 Korean golf courses, the green area of 2(two) green system was mostly 400~$600\m^2$(56.5%) and the green area of 1(one) green system was mostly 600~$800\m^2$(47.8%). In 48 Korean golf courses, 1.5~3% green slope appeared the highest frequency(50.0%) and the next was 3~5%(29.4%). 3. Penncross variety was the highest frequency(71.2%). The next was mixed variety (Penncross+Crenshaw, Penn A-1, Pennlinks, or Penneagle/SR 1020+SR 1019) and the frequency of mixed variety was 7.6%. 4. In 48 Korean golf courses, 70~80cm total thickness of green appeared the highest frequency(36.1%), 10~20cm thickness of green mixed sandy layer appeared the highest frequency(43.6%), and 10~20cm thickness of green coarse sandy layer appeared the highest frequency(55.6%). 0~10cm thickness of green gravel layer appeared the highest frequency(67.6%), 20~30cm thickness of green drain layer appeared the highest frequency(52.8%), and 20~30cm width of green drain layer appeared the highest frequency(44.4%). Below 1mm sand diameter used in green mixed sandy layer appeared the highest frequency(46.2%), below 2mm or over 2mm sand diameter used in green coarse sandy layer appeared the highest frequency(31.4%). 20~40mm coarse gravel diameter used in green gravel layer appeared the highest frequency(43.2%) and 0~20mm fine gravel diameter used in green gravel layer appeared the highest frequency(65.8%). 20~40mm gravel diameter used in green drain layer appeared the highest frequency(64.1%).

• Journal of the Korean Wood Science and Technology
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• v.36 no.6
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• pp.96-104
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• 2008

In this study, the observation of test pieces with an optical microscope was carried out after fabricating 4 groups of standard lacquer, in order to inquire into the ancient lacquering techniques. Group I had transparent reddish brown color, and the part of layer was indefinite, and the layer polished was easily distinguished. Group II had mostly transparent yellowish brown color, and it was possibility distinguished the layers when they were varnished with mixed lacquer after prime coating, and when they were varnished with lacquer as the prime coating. Group III set up membrane in the hardening process of the lacquer, and the lacquer and the unsaturated fatty acid of internal part was dried, so the top layer and the lacquer layer were separated and observed. Group IV: When the lacquer coat film of Group IV test pieces were observed in polarized light, the ferrous components were seen as the black and red color were mixed, and the silica crystals of silty soil were distinguished by reflection of lights. And the colors were distinguished as the lacquer layer of ruddle had red color, and the mixed lacquer of reddish lacquer and ruddle had the deep red color at the top and the bottom, but the middle part had the bright red color.

• Journal of Animal Environmental Science
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• v.5 no.1
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• pp.63-72
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• 1999

This study was carried out to improve utilization of fly ash. Each animal waste was mixed with fly ash and composted This compost used at forage crops with corn, rye and alfalfa to examine to examine the fertilized efficiency and investigated productivity of forage crops, composition of this copmost and effect of fly ash on soil characteristics and composition. Content of organic matte, P2O5, K2O, CaO, MgO, Mn and B at the soil, which is given fly ash, increased. After the test crops were harvested, pH of the soil was maintained about 7 and contents of organic matter, phosphoric aicd, K, Mg, and B was increased at the soil of used fly ash. As fly ash was mixed, each DM yield of corn and rye was increased 10∼13% and 14∼21% especially alfalfa was increased 35% at the soil which is mixed fly ash with cage layer manure. As fly ash was mixed, each Crude protein (CP) of corn and rye was increased 6∼17% and about 29%, especially, as fly and cage layer manure was mixed CP of alfalfa was increased 33%. In conclusion, as fly ash is mixed with anlmal waste and use at forage crops, It makes the soil good and improve the productivity of forage crops.

• Journal of Navigation and Port Research
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• v.30 no.8 s.114
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• pp.637-642
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• 2006

In this paper, we made an experiment on materials of two kinds. First, we made a study of Multi-layer EM wave absorbers using Sendust. In result, The bandwidth of the Multi-layer Sendust EM wave absorbers over 10 dB is extended in S-Band. Second, we investigated the mixing effects of AI(OH)3 on Multi-layer Sendust EM wave Absorbers. In result, the Multi-layer Sendust EM wave absorbers mixed with Al(OH)3 showed a extended bandwidth over 10 dB compared with non-mixed Multi-layer Sendust EM wave absorbers in S-Band.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2006.06b
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• pp.97-101
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• 2006

In this paper, Multi-layer EM wave absorbers using Sendust are presented. The bandwidth of the Multi-layer Sendust EM wave absorbers over 10 dB is extended in S-Band And we investigated the mixing effects of $Al(OH)_3$ on Multi-layer Sendust EM wave Absorbers. As a result, the Multi-layer Sendust EM wave absorbers mixed with $Al(OH)_3$ showed a extended bandwidth over 10 dB compared with non-mixed Multi-layer Sendust EM wave absorbers in S-Band.

• 한국해양학회지
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• v.16 no.2
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• pp.49-56
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• 1981

Annual variation of the surface mixed layer depth (MLD) in the southern part of the Sea of Japan is investigated based upon the oceanographic and meteorological data taken during 1971∼1975 by the Fisheries Research and Development Agency and the Central Meteorological Office of Korea. It is found that the variation of the MLD is strongly correlated with the heat exchange between the atmosphere and sea. The MLD and heat flux vary within ranges comparable to those in the Kuroshio region found by Bathen(1972) and Wyrtki(1965)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 1999.10a
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• pp.436-437
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• 1999

혼합층고도(Mixed Layer Height)는 대기오염물질의 확산에 큰 영향을 미치기 때문에 이에 대한 정확한 측정은 대기오염에 대한 연구에 있어 중요하다. 하지만 일반적으로 국내에서 환경영향평가 시에 수행하는 대기혼합고 측정은 비용상의 문제로 인하여 계절별 8회에 한정되고 있기 때문에, 그 결과의 대표성에 대한 문제제기가 계속되고 있다.(중략)

• Korean Journal of Materials Research
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• v.14 no.9
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• pp.614-618
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• 2004

Alloys of $Ti46\%Al-2\%Mo-2\%Nb$ were oxidized between 800 and $1000^{\circ}C$ in air, and their oxidation characteristics were studied. The alloys displayed good oxidation resistance due mainly to the beneficial effects of Mo and Nb. The oxide scales formed consisted primarily of an outer $TiO_2$ layer, an intermediate $Al_{2}O_3-rich$ layer, and an inner mixed layer of ($TiO_{2}+Al_{2}O_3$). Molybdenum and niobium dissolved in the scale effectively improved oxidation resistance. They were mainly distributed in the inner mixed layer of ($TiO_{2}+Al_{2}O_3$).