• 한국콘텐츠학회논문지
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• 제21권1호
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• pp.258-267
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• 2021

본 연구는 언택트 시대의 외식 트랜드에 따라 소비자의 관심과 수요가 계속적으로 증가하고 있는 밀키트 상품에 대해 실증분석 연구를 시도 하였다. 또한 HMR 밀키트 상품 선택속성의 요인과 소비자만족, 타인추천의도 간의 영향관계를 규명하고자 하였으며, 외식기업 및 스타트업 기업에서 출시 된 밀키트 상품 이용경험이 있는 소비자를 대상으로 편의표본추출을 사용하였다. 조사기간은 2020년 7월 01일 부터 약 1달간 진행되었으며, 최종 285부를 분석에 사용하였고, 가설 검증을 위해 SPSS 21.0 통계패키지 프로그램을 이용하였다. 분석 결과 가설1의 가격(β=.241), 편리성(β=.317), 다양성(β=.191)은 소비자만족에 유의한 영향이 있었고 가격(β=.482)과 편리성(β=.133), 다양성(β=.342)은 타인추천의도에 유의한 영향이 있는 것으로 나타났으며, 가설3의 소비자만족(β=.443)이 타인추천의도에 유의한 영향이 있는 것으로 분석되었다. 마지막으로 본 연구를 통해 밀키트 상품 관련 기초 연구 자료로 제공되길 기대하고 외식기업 및 레스토랑의 밀키트 상품개발에 방향성 제시와 마케팅의 활용 할 수 있는 이론적 근거로 제시하고자 한다.

• 대한수의학회지
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• 제31권2호
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• pp.223-228
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• 1991

Most progesterone enzyme immunoassays(EIA) are used liquid-phase double-antibody or single-antibody seperation. These methods consume considerable time and reagents because of the requirements for several washing and centrifugation steps involving the reactants. Because of these several problems, we were prompted to develop an effective enzyme-linked immunosorbent assay(ELISA) system that would be equal or superior to RIA for assay of progesterone. The results were obtained as follows. 1. Cross reaction of the progesterone antiserum with other steroids determined was shown with progesterone(100%), $11{\alpha}$-deoxycorti-costerone(2.271%), but the other steroids were shown below 0.9%. 2. Standard curve for progesterone ELISA was shown available difference according to progesterone concentration from 0 to 1,000pg/ml. 3. The lower limit of sensitivity was 0.2pg/well 4. Progesterone concentration was 1.6ng/ml for before parturition, and that was below 0.5ng/ml for after parturition. This development enzyme-linked immunosorbent assay for progesterone can be detected pregnancy diagnosis in cattle, and also applicable 10 research on physiological function including such as reproductive disorders.

• 한국소음진동공학회논문집
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• 제23권9호
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• pp.850-856
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• 2013

Torsional interaction between electrical network phenomena and turbine-generator shaft cause torsional stress on turbine-generator shaft and torsional fatigue fracture on vulnerable component, but the prediction of the torsional stress is difficult because the torsional stress is occurred instantly and randomly. Therefore continuous monitoring of the torsional stress on turbine-generator shaft is necessary to predict the torsional fatigue, but installing the sensors on the surface of the shaft directly to monitor the stress is impossible practically. In this study torsional vibration was measured using magnetic sensor at a point of turbine-generator rotor kit, the torsional stress of whole train of rotor kit was calculated using rotor kit's stress model and the calculated results were verified in comparison with the measured results using strain gauge at several point of turbine-generator rotor kit. It is expected that these experiment results will be used effectively to calculate the torsional stress of whole train of turbine-generator rotor in power plants.

• 한국정보전자통신기술학회논문지
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• 제2권1호
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• pp.11-15
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• 2009

본 연구에서 전원이 공급되는 의료기기들에서 공통적으로 사용되며, 성능, 안전성과 신뢰성 측면에서 기존 전원모듈보다 우수한 250 W SMPS방식을 적용한 의료용 전원모듈의 개발하였다. SMPS의 특성상 AC전원의 50 ~ 60 Hz 라인 주파수를 DC로 변환하는 회로의 설계와 높은 주파수로 변경하기 위한 전자회로로 구성하였고, 완전한 방사노이즈 흡수회로를 구성하여 의료기기 오동작을 방지하기 하도록 설계하였다. SMPS 전원모듈은 의료기기뿐만 아니라 PC, 가정용 기기 및 전자 교환기 등의 제품에도 확대 적용이 가능하다.

• 대한방사선기술학회지:방사선기술과학
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• 제11권1호
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• pp.25-31
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• 1988

Studies on the clinical significance with Amerlex $FT_{4}$ RIA kit observing the determination of $FT_{4}$ were investigated using a tracer as $^{125}I-T_{4}$ derivative which is not almostly bound to thyroxine binding globulin, etc. The results are followed; 1. $FT_{4}$ value($1,55{\pm}0.38ng/100ml$) of normal group was not accorded that of hyperthyroidism with Amerlex $FT_{4}$ RIA kit, and was higher than that of hypothyroidism. 2. $FT_{4}$ value was lower level in chronic-kidney disfunction syndrome whereas, it was normal in a cancer patient, a woman in pregnancy and a patient in TBG disfunction. 3. The value of this method is a good corelationship at that of equilibrium dialysis method. (r=0.931) 4. $FT_{4}$ value by this kit was linear relationship to those of the other kit (Gamma Coat and Liquisol), and the normal value of each methods was also similar. As mentioned above, this method is more simple and rapid, compared to the other method. Therefore, it was thought that this method is a very useful clinically.

• 한국전자통신학회논문지
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• 제8권8호
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• pp.1213-1218
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• 2013

최근에는 극한 분야에서 수상로봇, 수중로봇, 공중로봇과 같은 해양로봇의 필요성이 제기되고 있음에도 불구하고, 그 기반은 매우 부족하다. 다행히도, 로봇교육에 대한 요구가 증가하고 있으므로, 해양로봇키트의 개발 및 보급을 통하여 연구개발 기반을 마련하고 미래 인재를 양성하는 것이 바람직하다. 그러나, 기존에는 공중 이동 및 장애물회피가 가능한 풍선기반의 해양로봇키트가 없다. 이 문제를 해결하기 위해서, 적외선 센서를 이용하여 장애물회피가 가능한 풍선기반 자율 공중로봇키트가 개발되었다. 시험평가 결과는 실제 적용 가능성과 추가 연구의 필요성을 보여준다.

• 한국기계가공학회지
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• 제12권4호
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• pp.16-21
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• 2013

This paper presents a DC link voltage control method to reduce the ripple current and the switching loss in the sinusoidal current drive system for the wide-speed range PMSM. The DC link voltage of the three phase inverter in the sinusoidal current drive system is designed by the back-EMF voltage at maximum speed of the PMSM. In general, the drive systems have used the constant DC link voltage without reference to the motor speed. The current ripple causes hysteresis loss and makes noise. In addition, the switching loss on the inverter increases in proportion to the rise in the DC link voltage. In this paper, we propose the variable DC link voltage control method to reduce the current ripple in the PMSM drive system. We show reduction effect of the current repple and the switching loss through simulation results.

• Reproductive and Developmental Biology
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• 제29권2호
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• pp.109-115
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• 2005

Hematopoietic stem cells (HSC) are multipotent cells that reside in the bone marrow and replenish all adult hematopoietic lineages throughoutthe lifetime. In this study, we analyzed the expression of receptors of $P2Y_{10}$, purinergic receptor families in murine hematopoietic stem cells, hematopoietic progenitor cells. In addition, the biological activity of $P2Y_{10}$ was investigated with B lymphocyte cell line, Ba/F3 in effect to cell growth and cell cycle. From the analysis of expression in hematopoieticstem cell. and progenitor with RT-PCR, $P2Y_{10}$ was strongly expressed in murine hematopoieticstem cells (c-kit+ Sca-l+ Lin-) and progenitor cell population, such as c-kit- Sca-l+ Lin-, c-kit+ Sca-l- Lin- and c-kit- Sca-l- Lin-. To investigate the biological effects by $P2Y_{10}$, retroviral vector from subcloned murine $P2Y_{10}$ cDNA was used fur gene introduction into Ba/F3 cells, and stable transfectant cells were obtained by flow cytometry sorting. In cell proliferation assay, the proliferation ability of $P2Y_{10}$ receptor gene­transfected cells was strongly inhibited, and the cell cycle was arrested at G1 phase. These result suggest that the $P2Y_{10}$ may be involved the biological activity in hematopoietic stem cells and immature B lymphocytes.

• 한국분말재료학회지
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• 제23권3호
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• pp.189-194
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• 2016

We report a facile method for preparing KIT-1 mesoporous silicates with two different macroporous structures by dual templating. As a template for macropores, polystyrene (PS) beads are assembled into uniform three dimensional arrays by ice templating, i.e., by growing ice crystals during the freezing process of the particle suspension. Then, the polymeric templates are directly introduced into the precursor-gel solution with cationic surfactants for templating the mesopores, which is followed by hydrothermal crystallization and calcination. Later, by burning out the PS beads and the surfactants, KIT-1 mesoporous silicates with macropores are produced in a powder form. The macroporous structures of the silicates can be controlled by changing the amount of EDTANa4 salt under the same templating conditions using the PS beads and inverse-opal or hollow structures can be obtained. This strategy to prepare mesoporous powders with controllable macrostructures is potentially useful for various applications especially those dealing with bulky molecules such as, catalysis, separation, drug carriers and environmental adsorbents.

• The Korean Journal of Ecology
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• 제20권3호
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• pp.169-173
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• 1997

The measurement of cell death constant in Anabaena flos-aquae was tested by the Live/Dead BacLight Viability kit(Molecular Probes Co., Seatle, WA). When the Live/Dead BacLight Viability kit was applied to Anabaena flos-aquae, the cells with intact cell membranes(live cells) stained fluorescent green, while the cell with damaged membranes(dead cells) stained fluorescent red and the background remained virtually nonfluorescent. The rations of live : dead cells in the cell suspension were controlled artifically and Live/Dead BacLight Viability kit was applied to them. The ratios of green:red fluorescent cells in the cell suspension were the same as those of live : dead cells controlled artifically. It was also approved by the fluorescence emission. The cell death constant was measured in the P-limited Anabaena flos-aquae chemostal culture in the N-fixing and $KNO_3-supplied$ conditions. The culture in N-fixing chemostat had a dead cell proportion of 1.2% at the growth rate of 0.7/day and increased to 2.6% at the growth rate of 0.3/day. The cell death constant of N-fixing culture was 0.008/day.There was a same trend in the $KNO_3-supplied$ chemostat culture. The proportion of dead cell was 1.6% of dead cell proportion at the growth rate of 0.7/day and increased to 4.3% at the growth rate of 0.3/day.