• 한국포장학회지
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• 제27권3호
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• pp.203-210
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• 2021

With the development of package printing technology, the package has expanded from the basic function of protecting products to the marketing function through package design. Color, the visual element that composes the package design, is delivered to the consumer most quickly and effectively. As color marketing of these package designs expands, accurate color reproduction that the product wants to express is becoming more important. The color of an object is transmitted by absorption and scattering of light. Spectral reflectance refers to the intensity of light reflected by an object at different wavelengths by the spectral effect. As a result, the color of the object is expressed in various colors. Packaged printing inks have their own absorption and scattering coefficients, and the Kubelka-Munk model for color reproduction and prediction defines the relationship between these correlation coefficients through reflectance. In the Kubelka-Munk model for color reproduction and prediction, the relationship between the absorption and scattering coefficients (K/S) of printed material is predicted as the sum of the K/S values according to the mixing ratio of all color ink used. In this study, the reflectance of the measured print is reversely calculated at the mixing ratio of print ink using the Kubelka-Munk model. Through this, the relationship value of the ink-specific absorption/scattering coefficient constituting the final printed material is predicted. Delta E is derived through the predicted reflectance, and the similarity between the measured value and the predicted value is confirmed.

• 한국포장학회지
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• 제13권2호
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• pp.67-73
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• 2007

수확후 연화, 흑변, 저온장해 등의 생리장해로 품질이 급속히 저하되는 단감을 장기간 신선도를 유지하기 위하여, $0^{\circ}C$에서 비경쟁억제효소반응속도식으로 조사된 단감 과실의 호흡특성과 저밀도폴리에틸렌필름의 두께별 가스특성을 조사하여 적정수준의 저산소와 고이산화탄소농도를 유지하도록 MA 포장규격을 설정코자 본시험을 수행하였다. 40, 52, 60, 70 ${\mu}m$ 두께의 samples LDPE film의 산소와 이산화탄소 가스투과도는 각각 $Q_{O2}=(2,540{\times}1/L)-16ml{\cdot}hr^{-1}{\cdot}atm^{-1}{\cdot}m^{-2}$, $Q_{CO2}=(13,742{\times}1/L)-70ml{\cdot}hr^{-1}{\cdot}atm^{-1}{\cdot}m^{-2}$이었다. 개당 평균 과중이 $225{\pm}5$ g인 단감을 두께가 각각 40, 52, 60, 70 ${\mu}m$인 저밀도폴리에틸렌필름으로 한개씩 포장하여 $0^{\circ}C$에서 저장하였을 때 효소반응속도식으로 조사된 단감 과실의 호흡특성과 저밀도폴리에틸렌필름의 두께별 가스투과도를 고려하여 시간에 따른 포장내 공기조성의 변화를 예측한 값과 저장 70일후 조사한 실측값은 대체로 일치하는 결과를 보였고, 과육내 Acetaldehyde와 Ethanol의 축적과 생리장해과의 발생에 있어서도 최적 포장조건으로 예측된 두께 52 ${\mu}m$의 포장조건이 실제 저장에서도 적합한 것으로 조사되었다. 이 같은 방법으로 과실의 무게에 따른 적정 MA포장조건을 설정하였다. 포장작업 특별히 주의할 점은 필름의 접착을 완벽하게 하여 핀 홀의 발생이 없도록 해야 한다.

• 농촌계획
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• 제19권2호
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• pp.21-33
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• 2013

In these days, agricultural products are regarded as a core income source in tourism villages. Nevertheless, poor packaging of agricultural products has threatened the competitiveness and quality of products. For farmers, it is less likely to employ individual designer for developing and improving their packages due to low accessability to rural villages and budgets. Based on this background, this study conducted 'Charrette' in order to improve agricultural product packaging. The target village was 'Goraday' in Gangwon province. This study consisted of different steps for building and implementing proper 'Charrette' programs. Then, it also conducted empirical investigation about the effectiveness and efficiency of 'Charrette'. 'Charrette' has made progress as follows; first step was concerned with advance preparation for constructing program. Second, implementation of 'Charratte' included data collection and analysis, and development of design. Third, evaluation and feedback stage have given presentation and discussion about suggested design with local residents. Empirical investigation about the effectiveness and efficiency of 'Charrette' has been composed with survey and interview targeting participants. In survey and interviews, designers were asked about their attitudinal changes in relation to knowledge, recognition, function, motivation, and satisfaction toward 'Charrette' and 'agricultural product package design' before and after participating the event. The results showed that knowledge and perception of designers toward 'agricultural product package design' have positively increased. In addition, it revealed that designers were satisfied with collaborations with others and their contribution to rural community business. However, the results also suggested that sufficient preparation time/schedules and opportunity to meet other and farmers before events would be required to have better communication and understanding in relation to their tasks and role distribution. Furthermore, it is also required for designers to hold relationship with local community in order to actualize their packaging design.

• 한국식품저장유통학회지
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• 제24권7호
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• pp.934-941
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• 2017

파프리카는 우리나라의 대표적인 수출작물로 알려져 있지만 장거리 유통 중 일어나는 품질열화로 인해 상품적 가치가 감소되는 문제가 있다. 따라서 본 연구는 농산물 유통 시 주로 사용되는 골판지상자의 내부에 알루미늄을 코팅하여 기능성을 부여한 포장용기를 개발하였으며, 이를 이용하여 파프리카를 포장하여 저장 중 선도유지 및 품질특성에 미치는 영향을 알아보았다. 골판지상자 내부에 알루미늄을 코팅함으로써 방습성을 향상시키고 기체투과도를 저하시킴으로써 포장된 파프리카의 펙틴분해효소 활성이 저하됨에 따라 파프리카의 중량변화율과 조직연화 현상이 저해되었고, 산화효소 활성이 감소함으로써 총 페놀 함량 및 항산화 활성이 향상되는 것으로 나타났다. 결과적으로 알루미늄 코팅한 골판지상자는 파프리카의 상품성 및 저장성을 향상시키는 포장용기로 이용될 수 있을 것으로 생각되며, 알루미늄박의 내수성, 내한성, 보향성, 내오염성 등의 특성을 활용한 추가연구를 통해 국내 농산물의 장거리 유통 및 수출 활성화에 이바지할 수 있을 것이라 생각된다.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2009년도 추계학술대회 논문집
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• pp.631-636
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• 2009

This paper presents design and analysis of ultrasonic vibrator featuring the piezoelectric actuator. After describing a geometric configuration of the proposed vibrator, an analytical model of the ultrasonic vibrator is formulated by adopting liquid film pattern theory and wave theory. The dynamic analysis and geometric optimization are then undertaken using a software ANSYS. The optimization is performed by taking the amplitude of the tip displacement as an objective function. The fluid flow characteristics of the proposed vibrator are analyzed by taking three different fluids: water, silicon oil and ethylene-glycol. This is achieved using a software FLUENT.

• 한국소음진동공학회논문집
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• 제19권12호
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• pp.1289-1295
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• 2009

This paper presents design and analysis of ultrasonic vibrator featuring the piezoelectric actuator. After describing a geometric configuration of the proposed vibrator, an analytical model of the ultrasonic vibrator is formulated by adopting liquid film pattern theory and wave theory. The dynamic analysis and geometric optimization are then undertaken using a software ANSYS. The optimization is performed by taking the amplitude of the tip displacement as an objective function. The fluid flow characteristics of the proposed vibrator are analyzed by taking three different fluids: water, silicon oil and ethylene-glycol. This is achieved using a software FLUENT.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2000년도 제26회 펄프종이기술 국제세미나
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• pp.34-39
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• 2000

Today's size of production operations in the packaging paper sector I sconstantly increasing , featuring integral processing systems, high-speed paper machines, and the increased marketing of lower basis weight products. The risk factors involved in these large investments lie more than ever in the available furnish potential and ongoing requirements for further closure of water loops and lower operating costs. A comparison is drawn between recovered paper furnish mixtures used in European mills with regard to fibre properties, strength potential and contaminant content, Both the furnish situation and development trends in modern fluting and testliner machines are instigating concept changes in stock preparation, the approach flow as well as in process water and rejects technology. Developments are currently focussed for example on more efficient debris separation using fine slotted screening, optimized refining , more systematic process water management with loop separation and integral water clarification as well as more efficient removal of microstickies, fillers and fines through appropriate combination of rejects handling and water clarification processes. Product quality differentiation depends decisively on strength characteristics as a function of refining , fines removal , paper machine technology, and sizing . Maximum availability of today's high speed paper machines and , as a result, cost effective production can be ensured by optimum balancing of all subsystems with in the overall concept and by reliable control of problems with contaminants and deposits.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.1587_1588
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• 2009

In this paper, PCB embedded balanced-to-unbalamced duplexer using coupled LC resonator was introduced for low cost dualband WiMax front-end-module application. In order to obtain the function of bandpass filter and balun transformer, proposed duplexer was configured by using magnetically coupled LC resonator. Out-of-band suppression was enhanced by applying two m-Derived transform circuits to obtain transmission zeros at 2GHz and 4.8GHz. In order to reduce the size of embedded duplexer, BaSrTiO3 (BST) composite high Dk RCC film was applied to improve the capacitance density. This high Dk film provided the capacitance density of 12.2 pF/mm2. The simulation results shows that fabricated duplexer had an insertion loss of 2.9dB and 5.5dB and return loss of 15dB and 16dB for 2.5GHz~2.6GHz and 3.5GHz~3.6GHz, respectively. The maximum magnitude and phase imbalance were 0.01dB and 0.17dB, and 1degree and 2degree in its passband, respectively. The out-of-band suppression was observed approximately 29dB and 40dB below 1.9GHz and over 4.5GHz, respectively. It has a volume of 6 mm $\times$ 7 mm $\times$ 0.7 mm (height).

• JSTS:Journal of Semiconductor Technology and Science
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• 제16권2호
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• pp.153-158
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• 2016

The elastic material constants, stiffness constants ($c_{11}$, $c_{12}$, and $c_{44}$), are three unique coefficients that establish the relation between stress and strain. Accurate knowledge of mechanical properties and the stiffness coefficients for silicon is required for design of Micro-Electro-Mechanical Systems (MEMS) devices for proper modeling of stress and strain in electronic packaging. In this work, the stiffness coefficients for silicon as a function of temperature from $-150^{\circ}C$ to $+25^{\circ}C$ have been extracted by using the experimental measurements of Poisson's ratio (${\nu}$) of silicon in several directions.

• 마이크로전자및패키징학회지
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• 제14권1호
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• pp.49-53
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• 2007

직접 메탄올 연료전지는 간단한 구조와 디자인 그리고 높은 에너지 밀도와 에너지 변환 효율등의 장점으로 인하여 휴대용 장치들의 전력원으로 사용된다. 본 논문에서는 직접 메탄올 연료전지의 연료 농도를 감지하기 위한 얇은 나피온 막과 Pt 촉매전극의 합성으로 만들어진 메탄을 센서를 제작하였다. 제작된 메탄을 센서를 사용하여 메탄올 농도와 촉매전극(Pt)의 두께 변화에 따른 전류-전압 특성을 분석하였다. Pt 촉매전극 10nm, 전압이 1V 이고 메탄올 농도 1, 2, 3M일 때 전류 값이 각각 $1.30{\times}10^{-6}A,\;1.96{\times}10^{-6}A,\;2.80{\times}10^{-6} A$ 이었다. 메탄올 농도를 2M로 고정하고 촉매전극의 두께를 5, 10, 15nm로 변화시켰을 때 전류 값은 각각 $3.06{\times}10^{-6}A,\;1.96{\times}10^{-6}A,\;1.00{\times}10^{-6}A$ 이었다. 촉매전극이 얇을수록 전류가 증가하고 전기화학반응이 더 활발히 일어나는 것으로 사료된다.