• International journal of advanced smart convergence
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• 제10권1호
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• pp.89-96
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• 2021

The goal of this study is to develop experiment monitoring system of agriculture fields using ZigBee wireless modules. Soil moisture, ambient temperature, atmospheric pressure and intensity of sunlight are the most important factorsto grow a wheat crop and other vegetables. In orderto monitorthe factorssoil moisture (YL69), air pressure (BMP180), temperature (DS18B20), photoresistor were used for sensing environment data. The TI CC2530 RF SoC chip was used in the system. ZigBee modules were connected to star topology. ZigBee modules send data wirelessly to a data center. This data can be displayed and analyzed on the main monitoring program as needed also sent to the client mobile. Characteristics of the sensors were determined by experiment results.

• 대한원격탐사학회지
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• 제39권6_1호
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• pp.1185-1193
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• 2023

위성 영상을 활용하여 정확한 토양 수분도를 산정하는 연구는 원격탐사 응용 분야에 포함되는 중요한 기본 연구 주제 중 하나이다. 이 연구의 목적은 KOMPSAT-3/3A 영상과 KOMPSAT-5 SAR 영상을 적용하여 시험 지역에 대하여 토양수분도를 제작하고 산정된 결과를 정확도 검증 차원에서 미국 NASA에서 제공하는 Soil Moisture Active Passive (SMAP)의 토양수분 자료와 정량 비교하는 것이다. 한편 농림 식생 지대를 중심으로 토양수분도를 산정하기 위하여 환경공간정보서비스에서 제공하는 토지피복지도를 연구에 적용하였다. 시험 연구 지역은 이 연구에 적용한 수분 구름 모델(Water Cloud Model)에 기반한 토양수분 산정 알고리즘 적용에 필요한 입력 자료가 모두 가용한 제주 서부 지역을 선정하였다. 토양수분도 제작에 사용한 Synthetic Aperture Radar (SAR) 영상은 KOMPSAT-5 HV와 Sentinel-1 VV 영상이며, 식생지수는 KOMPSAT-3 영상의 지표반사도를 사용하였다. 이 연구에서 산출한 토양수분도 산정 결과와 SMAP (L-3) 자료를 차분 연산으로 비교하면 차이 값이 평균 4.13±3.60p%의 높은 일치도를 보이는 것으로 나타났고, SMAP (L-4) 자료와의 차분 연산 결과는 평균 14.24±2.10p% 수준의 일치도를 보였다. 이 연구를 통하여 향후 우리나라 위성영상과 공공 제공자료를 이용하여 정확도가 높은 정밀 토양수분도를 제작할 수 있는 가능성을 제시하였다.

• 한국축산식품학회지
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• 제33권6호
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• pp.723-729
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• 2013

In this study, the quality characteristics due to the influence of various thawing methods on electro-magnetic and air blast frozen beef were examined. The loin and round of second grade Hanwoo were sliced into 5-7 cm thickness and packed with aerobic packaging. The packaged beef samples, which were frozen by air blast freezing at $-45^{\circ}C$ and electro-magnetic freezing at $-55^{\circ}C$, were thawed by 4 thawing methods with refrigeration ($4{\pm}1^{\circ}C$), room temperature (RT, $25^{\circ}C$), cold water ($15^{\circ}C$), and microwave (2450 MHz). These samples were thawed to the point, which were core temperature reached $0^{\circ}C$. Analyses were carried out to determine drip and cooking loss, water holding capacity (WHC), moisture contents and sensory evaluation. Frozen beef thawed by microwave indicated a lower drip loss (0.66-2.01%) than the other thawing methods (0.80-2.50%). Cooking loss after electro-magnetic freezing indicated 52.0% by microwave thawing for round compared with 41.8% by refrigeration, 50.1% by RT, and 50.8% by cold water. WHC thawing by microwave with electro-magnetic freezing didn't showed any difference depending on the thawing methods, while moisture contents was higher thawing by microwave with electro-magnetic freezing than refrigeration (71.9%), RT (75.0%), and cold water (74.9%) for round. The texture of sensory evaluation for round thawed by microwave result was the highest than refrigeration (4.7 point), RT (6.4 point) and cold water (6.6 point), while sensory evaluation was no significant difference. Therefore, it was shown that microwave thawing is an appropriate way to reduce the deterioration of meat quality due to freezing.

• 융합신호처리학회논문지
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• 제18권1호
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• pp.25-30
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• 2017

현재 곡물선별기는 대부분 CCD 광학카메라를 이용하여 불량품을 찾아내고 있다. 본 논문에서는 CCD 카메라를 이용함과 동시에 근거리적외선 센서의 수분측정 방법을 추가하여 곡물선별기의 선별력향상을 목표로 한다. 그리고 구현한 알고리즘을 곡물선별기에 실제로 적용할 수 있도록 근거리적외선 영상보드 시스템을 개발하여, 원료의 내부 수분 함량을 고속으로 체크하여 일정함량 미달인 경우 불량으로 간주하여, 불량품을 실시간으로 제거하는 곡물선별기 시스템을 개발하고자 한다.

• 식품보건융합연구
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• 제5권2호
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• pp.35-43
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• 2019

The effect of pan frying method was evaluated for proximate composition of selected fish species Pampus argenteus, Lethrinus nebulosus and Acanthopagarus arabicus which were determined by standard procedures. Proximate compositions found in the frying fillets were different to the raw fish samples. The moisture content seems to decrease in all fried samples. The reason of moisture loss at the time of frying produced is excessive protein amount in fried fish as compare to raw fish. Protein content seemed to increase in Pampus argentus > Lethrinus nebulosus and >Acanthopagrus arabicus in their particular fried form. The outcomes shown that protein content was in the ranges of 14.83-25.07 g/100g in fried samples, while the fat content was between 3.76-9.77 g/100 g. The energy content was the highest in the fried fish Lethrinus nebulosus (236 kcal/100 g), Pampus argentus (161 kcal/100 g) and Acanthopagrus arabicus (135 kcal/100 g). The information achieved in this study would be very important to fish consumers, processors and nutritionists to academically increase their awareness regarding the nutrients contents in selected fish species.

• 한국산업융합학회 논문집
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• 제8권1호
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• pp.47-55
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• 2005

Infrared heating has been traditionally used in industrial applications for processes such as dehydration of food industrial. This heating method involves the application of radiation in the wavelength range of 2 to 50 micrometers. In this work, simultaneous heat balance equations were developed to simulate the infrared radiation heating of agricultural products. The equations assume that moisture diffuses to the outer boundaries of the material in liquid form and evaporation occurs at the surface of the agricultural products. Energy for moisture evaporation is supplied by the infrared radiant energy. The optimum temperature and drying time for the best drying conditions of changing the red peppers with the moisture content of 18% and the restore rate of 80~85% are $80^{\circ}C$ and 44 hours. The performance of radiation tubes coating with the radiation paint developed in this research has the energy of $2.27{\times}103W/m^2{\mu}m$, $150^{\circ}C$ within the scope of radiation wave length of $2{\sim}30{\mu}m$ and has the radiation 0.92~0.93, which is superior to the general radiation tubes. The extinction coefficient according to the band pass filter using the 4 flux theory ha higher dependability on wave length, accounting for $2{\sim}17{\mu}m$ and $5{\times}105{\sim}106m-1$. A comparison between the theoretical energy transfer whose figures are interpreted according to 4 flux theory and the experimental energy transfer of far infrared dryer leads to the findings of the agreement less than 5%.

• 한국융합학회논문지
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• 제10권3호
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• pp.237-242
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• 2019

본 연구는 파라핀 왁스 마스크팩의 피부개선 효과를 확인하기 위한 연구이다. 연구 대상은 20대 성인 남녀 13명을 대상으로 시행하였다. 연구는 4주간 8회 대상자에게 파라핀왁스 마스크팩을 적용하였다. 파라핀왁스 마스크팩의 피부개선 효과를 확인하기 위해 피부 유 수분도, 피부 표면온도, 피부 부드러움 정도 및 피부상태 주관적 만족도를 측정하였다. 파라핀 왁스 마스크팩 도포 후 피부의 유수분도, 피부표면 온도가 상승하였으며, 피부 부드러움 정도와 유 수분도 및 피부톤의 내용을 포함한 피부 주관적 만족도도 개선되었음을 확인하였다. 따라서 본 연구결과 파라핀왁스 마스크팩은 피부개선에 효과가 있음을 확인하였고, 피부관리를 위한 피부미용기기 개발에 유용성과 가치가 있을 것이다.

• 융합정보논문지
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• 제11권5호
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• pp.206-214
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• 2021

본 연구는 인삼저온숙성비누의 세안효과를 연구하기 위하여 진행하였다. 피부상태에 영향을 줄 수 있는 외부적 환경인자를 배제하기 위하여 동일한 환경에서 동일한 물과 타월을 사용하였으며, 세안 전과 세안 직후 10분의 피부변화를 조사하였다. 대조군으로는 세안제를 사용하지 않고 물세안만 한 경우와 시중에서 일반적으로 사용되고 있는 폼클렌저 타입의 세안제를 사용한 경우를 설정하였다. 물세안, F/C세안, 인삼cp비누 세안의 세 가지 케이스를 비교 분석하였으며 물세안의 경우 모공과 색소침착을 유의성있게 감소시켰으나 F/C세안과 인삼cp비누에 비하여는 유의성이 크지는 않았다. F/C세안의 경우 모공과 색소침착을 유의성이 크게 감소시켰으나 세안 후 급격한 수분감소가 나타났다. 인삼cp비누를 이용한 세안의 경우 모공과 색소침착을 유의성 크게 감소시키면서도 수분의 손실은 크게 나타나지 않았다. 그러므로 인삼cp비누는 피부관리를 함에 있어서 가장 적합한 세안제의 형태라고 사료된다.

• 한국환경과학회지
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• 제28권6호
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• pp.545-552
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• 2019

Tropaeolum majus, with a high decorative and food demand for vertical greening systems, has been utilized to revitalize urban agriculture. The effects of number of non-woven fabrics in a non-water environment and the adaptability of T. majus to this system were investigated. Planting ground composition of the container-type wall vertical greening system was made using non-woven fabric in one, two, three, or four layers. The results showed that the soil water content remained the highest when the non-woven fabric comprised 4 sheets. The morphological properties showed more growth with the 4 sheets than with 1, 2, and 3 sheets. In terms of physiological characteristics, chlorophyll content was mostly high in the 4 sheets, while shoot fresh weight value was in the order of 3 > 4 > 2 > 1 sheet, and root fresh weight value was in the order of 4 > 2 > 1 > 3 sheets. The dry weight of the measured values in the shoot was in the order of 4 > 3 > 2 > 1 sheet while no clear difference was found in the root of each treatment. The difference in the flowring characteristics was not different, but in evaluating the characteristics as a whole, the growth in the three layers of non-waven fabric was the best. In addition, the soil moisture contents and the growth characteristics were statistically significant as a positive correlation between the groups. Thus, greater the non-woven fabric, the higher is the adaptability of T. majus to dry stress under soil water-free conditions by maintaining soil moisture content. This showed that it represented an effective alternative as a method of vertical greening system for lower maintenance urban agriculture.

• 한국세라믹학회지
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• 제56권6호
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• pp.601-605
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• 2019

This work reports the preparation of ceramic hybrid films with illite-polyethylene composites analyzed as a function of concentration of added illite in polyethylene. The enhancement of oxygen and water-vapor transmission rate of illite-polyethylene film was evaluated to determine its influence on the freshness in fruit packaging. Particle size of illite materials was controlled in the range of 1~10 ㎛ and then mixed with LDPE to form the masterbatch. Ceramic hybrid films were prepared through a blown film making process. To determine the dispersity and abundancy of illite materials in the polyethylene matrix, various characterizations of illite-PE hybrid masterbatch and films were performed using SEM, TGA, and FT-IR. The oxygen and water-vapor transmission rate of illite-polyethylene film was found to be two times higher than that of LDPE film.