• 제목/요약/키워드: emission change

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Effect of Far-Infrared Finishing on Brassiere Pad

  • Shin Jung-Sook
    • The International Journal of Costume Culture
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    • v.8 no.2
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    • pp.124-131
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    • 2005
  • This study focused on the change of skin temperature by the emissivity and emission power of far-infrared for conformant far infrared effect to naked eyes. The study method is to manufacture the bra pad by each concentration on far-infrared materials of illite powder $(K,H_3O)AI_2(Si,Al)_4O_{10}(H_2O,OH)_2)$, liquid alumina ($Al_2O_3$), the extracted liquid from 29 kind of medical plants, then, measured change of skin temperature. Result are as follows. Far-infrared were emitted each $90.2\%,\;90.1\%,\;89.7\%$ from the illite powder, liquid alumina, extracted liquid from medical plants. When the testee weared the bra pad, the temperature of coated bra pad was $0.5^{\circ}C$ higher than the non finished bra pad. Washing fastness on far-infrared finishing was better dope addition method than coating method.

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Fault Detection of Plasma Etching Processes with OES and Impedance at CCP Etcher

  • Choi, Sang-Hyuk;Jang, Hae-Gyu;Chae, Hee-Yeop
    • Proceedings of the Korean Vacuum Society Conference
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    • 2012.08a
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    • pp.257-257
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    • 2012
  • Fault detection was carried out in a etcher of capacitive coupled plasma with OES (Optical Emission Spectroscopy) and impedance by VI probe that are widely used for process control and monitoring at semiconductor industry. The experiment was operated at conventional Ar and Fluorocarbon plasma with variable change such as pressure and addition of N2 and O2 to assume atmospheric leak, RF power and pressure that are highly possible to impact wafer yield during wafer process, in order to observe OES and VI Probe signals. The sensitivity change on OES and Impedance by VI probe was analyzed by statistical method including PCA to determine healthy of process. The main goal of this study is to find feasibility and limitation of OES and Impedances for fault detection by shift of plasma characteristics and to enhance capability of fault detection using PCA.

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Behaviors of Cutting Force and Acoustic Emission in Different Helix Angle Endmilling (부등각 엔드밀 가공시 절살력과 음향방출 신호 거동)

  • Kim, Wom Il;Wang, Duck Hyun;Kim, Young Soo
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.1 no.1
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    • pp.15-22
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    • 2002
  • This study shows how the change of helix angle of different helix angle end mill affects machining accurracy. It was verified that cutting force are remarkably low when endmill has helix angle of different helix angle 250, 310, 370 and AE signal have less reationshap with the change of helix angle. Moreover, as the number of rotations are increases, the AE signal increased with the proportion to the number but cutting force are inversely proportional to the rotation.

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Combustion Characteristics in a Constant Volume Combustion Chamber with Sub-Chamber (II) Effect of Combustion Promotion with Configuration Change of the Critical Passagehole (부실식 정적연소실내 연소특성에 관한 연구 (II) 임계연락공의 형상변화에 따른 연소촉진효과)

  • 김봉석;권철홍;류정인
    • Transactions of the Korean Society of Mechanical Engineers
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    • v.17 no.10
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    • pp.2611-2623
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    • 1993
  • To construct the design back data for a lean-burn gas engine, we investigated the combustion characteristics in the main chamber using a constant volume combustion chamber with subchamber. The combustion characteristics with configuration change of the critical passageholes have been studied by taking pressure data, schlieren photograph, ion current and light emission signal of flame. Heat release rate with various critical passageholes also have been analysed by using the combustion model of a prechamber diesel engine. It was found that combustion characteristics in the main combustion chamber were greatly influenced by the geometric configurations of critical passagehole.

Life Cycle Assessment on Food Waste Treatment Systems - biogasification and composting -

  • Yasuhiro Hirai;Sakai, Shin-ichi;Hiroshi Takatsuki
    • Proceedings of the Korean Institute of Resources Recycling Conference
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    • 2001.05b
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    • pp.109-112
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    • 2001
  • A case study of foodwaste treatment was conducted to compare the impacts of four scenarios: incineration, incineration after biogasification, biogasification followed by composting, and composting. Potential contributions to climate change, acidification, consumption of landfill and human toxicity were assessed. Characterization of human toxicity caused by metals and PCDD/DF was performed by three multimedia fate models. Scenarios with a biogasification process showed lower impact on climate change and human toxicity. The ranking of four scenarios on human toxicity varied depending on the characterization models applied. The steady state models placed high priority on emission of heavy metals to farmland, whereas the dynamic model estimated the emission of PCDD/DF from the incineration process as more significant.

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Sequential Change of Hypometabolic Metastasis from Non-small-cell Lung Cancer on Brain FDG-PET/CT (연속적인 FDG-PET/CT 검사에서 섭취 감소로 관찰된 비소세포암의 뇌전이)

  • Park, Soon-Ah;Yang, Sei-Hoon;Yang, Chung-Yong;Choi, Keum-Ha
    • Nuclear Medicine and Molecular Imaging
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    • v.43 no.5
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    • pp.505-507
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    • 2009
  • A 60-year-old woman, who had non-small-cell lung cancer (NSCLC) in left lower lobe underwent brain F-18 fluorodeoxyglucose positron emission tomography/computed tomography (FDG-PET/CT) for evaluation of cerebral metastasis. On follow-up FDG-PET/CT, only hypometaolic lesion was detected and progressed in right frontal lobe at 6 months and 10 months, later. Hypermetabolic metastasis was not detected even at last scan time of FDG-PET/CT. Brain MRI showed brain metastasis in right frontal lobe. As might be expected, the physician should take cerebral metastasis into consideration even though there is only hypometabolic change on subsequent FDG-PET/CT in patients with NSCLC.

Work Function Change of W(123) Plane Due to Hydrogen and Deuterium Adsorption at 78K (78K에서 수소 혹은 중수소 흡착으로 인한 W(123)면의 일함수 변화)

  • 박노길;김기석;김성수;정광호;황정남;최대선
    • Journal of the Korean Vacuum Society
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    • v.1 no.1
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    • pp.78-82
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    • 1992
  • The changes in work function due to hydrogen and deuterium adsorption on W(123) plane are measured by means of Field Emission Method. In the case of hydrogen or deuterium adsorption, work function of W(123) plane at 78 K increase and after a maxium value, it decrease and saturated as increasing coverage. After annealing the tungsten emission tip at 200 K, the coverage corresponding to maximum change in work function was shifted toward low coverage and the effect of work function by terraces or steps of which orientation is [ O l l ] was observed.

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Some Thoughts on LCCO2 of the Railway Track System (철도 궤도시스템의 LCCO2에 관한 소고)

  • Minnu, Tian;Lee, Woo-Chul;Choi, Sang-Hyun;Lim, Nam-Hyoung
    • Proceedings of the KSR Conference
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    • 2009.05a
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    • pp.548-551
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    • 2009
  • The report of the intergovernment panel on climate change(IPCC) concluded that the global warning due to Green-house Gas(GHGs) will be accelerated in the 21th century. The railroad construction sector consumes a great deal of natural resources and energy in construction. maintenance, and demolition stage. In order to establish and perform reducing plan of GHGs of railway track system for effective corresponding the Climate Change Agreement, the evaluation method of the lifecycle CO2 emission if needed. In this research, it was investigates that the research trend for the LCCO2 and the method to estimate the lifecycle carbon dioxide emission amount of the railway track system as quantitative.

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Energy Consumption and GHG Emissions from Fuel Combustion in Korean Livestock Sector (축산업의 에너지 소비 및 연료연소에 의한 온실가스 배출 특성)

  • Shim, Sunghee;Lee, Bo Hye;Park, Tae Sik;Jeong, Kyonghwa
    • Journal of Climate Change Research
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    • v.6 no.4
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    • pp.267-276
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    • 2015
  • This study estimates Korea's livestock energy consumption and GHG emissions from Korean livestock sector. The results show that livestock energy consumption in 2013 is 474 thousand TOE, 19.0% of total energy consumption in agriculture sector. It is estimated that GHG emission of fuel combustion from livestock sector is 956 thousand tons of $CO_2$ equivalent while a total of 4,589 thousand tons of $CO_2$ equivalent is emitted from agriculture sector. The livestock GHG emission as a proportion of the total agriculture GHG emissions (20.8%) is higher than the livestock energy consumption as a proportion of agriculture energy consumption (19.0%). This is because coal and petroleum consumption in livestock sector as a proportion of the total livestock energy consumption is higher than that in agriculture sector.

The design and the analysis of a LED illumination lens using the overlapped model (중첩모델을 이용한 조명용 LED 렌즈설계 및 분석)

  • You, Ilhyun
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.21 no.1
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    • pp.157-164
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    • 2017
  • In this research, the overlapped illumination model was used for designing a freeform LED lens with a uniform illuminance distribution on its illuminating plane, and their performances and tolerances were compared. And, the illuminations on a illumination plane was measures for change with average illuminance and illuminance uniformity. As a result of the tolerance analysis about z-axis direction change, thickness change in lens and tilt change of light emission and characteristic change in LED source, overlapped model and divergent illumination model are similar to the performance about Z-axis direction change of light emission in LED source. but the uniformity illumination value in this overlapped model is more remarkably value than it in divergent illumination model about thickness change in LED lens. Also, even though the lens based on a divergent illumination model showed good performance compare to the lens based on an overlapped illumination model, the latter was less the deviation to variation of LED beam radiation ability.