• Title/Summary/Keyword: RFT

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Volatile Flavor Compounds of a Crab-like Flavoring Base Made Using Reaction Flavor Technology (반응향을 적용한 게향미제 Base의 휘발성 향기성분)

  • Ahn, Jun-Suck;Jeong, Eun-Jeong;Cha, Yong-Jun
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.43 no.1
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    • pp.102-109
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    • 2014
  • Crab-like flavoring base (CFB) was made from a concentrated snow crab cooker effluent (SCCE) containing five food additives (proline, glycine, arginine, methionine, fructose) using reaction flavor technology (RFT). The volatile flavor compounds in CFB were compared between raw (SCCE) and control (without food additives) samples using solid phase microextraction (SPME) and gas chromatography with mass selective detector. A total of 74 compounds were detected in all samples (30 raw samples, 34 control samples, 55 CFB samples). A total of 22 nitrogen-containing compounds, including 19 pyrazines and 3 pyridines, were formed through RFT and increased 27 times compared to the control. Dimethyl trisulfide and dimethyl disulfide were predominant sulfur-containing compounds that increased through RFT, while aromatic compounds decreased through RFT. Seven compounds, tetramethylpyrazine, 2-ethyl-3,5,6-trimethylpyrazine, 2,3,5-trimethyl-6-(3-methylbutyl)pyrazine, 2-ethyl-3,5-dimethylpyrazine, 2,5-dimethyl-3-(3-methylbutyl)pyrazine, 2-ethyl-3,6-dimethylpyrazine, and 2-decanone potentially have a role in CFB odor by Pearson's correlation analysis.

Thinking about the training system of R.O.K. reserved force in the future (미래형 예비군 훈련체제 정립에 관한 연구)

  • Jeong, Won-Young
    • Journal of National Security and Military Science
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    • s.5
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    • pp.47-85
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    • 2007
  • Reserved force's training(RFT) is undoubtedly the critical component to increase the national capability in case of emergency. It is because RFT plays an important role in maintaining the peace for the Korean peninsula as the key deterrence force power for more than 40 years. Considering the reserved force reform linked with the goal and the plan of Korean Defense Reform 2020', we can expect the utility of the reserved force as the potential combat power to make national defense resources more efficient and useful. In that sense, this study suggests some solutions to promote the reserved force's competency to demonstrate the ROK Armed Force's combat power as the equivalent partner with the active force as well as the future deterrence power. This study also analyzes the present training system including law and regulation, identifies some implications through the literature review, and designs the future ROK reserved force's training system by extracting new variables forecasting the future environment for national defense. In addition, this study includes its concerned systems generally without limiting the scope into the reserved force. Therefore we try to seek to prepare for mobilization readiness and to promote regional hometown defense capability in order to cope with the enemy's threat in case of emergency.

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Development of Remote Reld Testing Technique for Moisture Separator & Reheater Tubes in Nuclear Power Plants (원자력발전소 습분분리재열기 튜브 원격장검사 기술 개발)

  • Nam, Min-Woo;Lee, Hee-Jong;Kim, Cheol-Gi
    • Journal of the Korean Society for Nondestructive Testing
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    • v.28 no.4
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    • pp.339-345
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    • 2008
  • The heat exchanger tube in nuclear power plants is mainly fabricated from nonferromagnetic material such as a copper, titanium, and inconel alloy, but the moisture separator & reheater tube in the turbine system is fabricated from ferromagnetic material such as a carbon steel or ferrite stainless steel which has a good mechanical properties in harsh environments of high pressure and temperature. Especially, the moisture separator & reheater tubes, which use steam as a heat transfer media, typically employ a tubing with integral fins to furnish higher heat transfer rates. The ferromagnetic tube typically shows superior properties in high pressure and temperature environments than a nonferromagnetic material, but can make a trouble during the normal operation of power plants because the ferrous tube has service-induced damage forms including a steam cutting, erosion, mechanical wear, stress corrosion cracking, etc. Therefore, nondestructive examination is periodically performed to evaluate the tube integrity. Now, the remote field testing(RFT) technique is one of the solution for examination of ferromagnetic tube because the conventional eddy current technique typically can not be applied to ferromagnetic tube such as a ferrite stainless steel due to the high electrical permeability of ferrous tube. In this study, we have designed RFT probes, calibration standards, artificial flaw specimen, and probe pusher-puller necessary for field application, and have successfully carry out RFT examination of the moisture separator & reheater tube of nuclear power plants.

Design of Radio Frequency Test Set for TC&R RF Subsystem Verification of LEO and GEO Satellites (저궤도 및 정지궤도위성의 TC&R RF 서브시스템 검증을 위한 RF 시험 장비 설계)

  • Cho, Seung-Won;Lee, Sang-Jeong
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.42 no.8
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    • pp.674-682
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    • 2014
  • Radio Frequency Test Set (RFTS) is essential to verify Telemetry, Command & Ranging (TC&R) RF subsystem of both Low Earth Orbit (LEO) and Geostationary Earth Orbit (GEO) satellite during Assembly Integration & Test (AI&T). The existing RFTS was specialized for each project and needed to be modified for each new satellite. The new design enables RFTS to be used in various projects. The hardware and software was designed considering this and therefore it could be directly used in other projects within a similar test period without modification or inconvenience. It will be also easily controlled, modified, and managed through the extension in modularization according to each function and the use of COTS (commercial on-the-self) and this will improve system reliability. A more reliable RF test measurement is also provided in this new RFTS by using an accurate reference clock signal.

Changes in the Quality of Crab-like Flavorants during Storage (게 향미제의 저장중 품질특성 변화)

  • Baek, Jeong-Hwa;Jeong, Eun-Jeong;Jeon, Seon-Young;Cha, Yong-Jun
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.45 no.2
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    • pp.104-113
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    • 2012
  • Crab-like flavorants (CFs) were made from snow crab cooker effluent (SCCE) using response surface methodology (RSM) and reaction flavoring technology (RFT). Type A CF was made from SCCE via RSM, RFT, adding starch syrup, centrifugation, and microfiltration. Type B was made from type A by adding the food additives dimethyl sulfide, ethyl valerate and fish sauce. The stability of the CFs was evaluated in terms of the color values, sensory evaluation, and flavor profiles after storage for 90 days at three different temperatures: 10, 20, and $30^{\circ}C$. The compounds, ethanol and 3-methyl-1-butanol, were considered key components of off-flavor and a decrease in dimethyl-2-vinylpyrazine affected the occurrence of off-flavor. It may be a microbial metabolite arising from contamination and lab-scale micro-filtration. At the lowest temperature ($10^{\circ}C$), the decrease in volatile compounds, such as pyrazines, was not as dramatic as at $20^{\circ}C$ and $30^{\circ}C$ and alcohol formation was prevented or delayed. Therefore, it is necessary to store CFs at < $10^{\circ}C$ with suitable sterilization to preserve volatile flavor compounds and prevent off-flavor from occurring.

Impact of Storage Stability on Soybean (Glycine max L.) Flour Stored in Different Conditions and Package Materials

  • Park, Sung-Kyu;Prabakaran, Mayakrishnan;An, Yeonju;Kwon, Chang;Kim, Soyeon;Yang, Yujin;Kim, Seung-Hyun;Chung, Ill-Min
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.63 no.4
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    • pp.338-359
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    • 2018
  • Soybean (Glycine max L.), a major part of Asian diet, is consumed primarily for its nutritional value. However, poor storage stability often leads to loss of nutritional value or deterioration in quality. This study focused on the storage stability of soy flour obtained from raw and roasted "Saedanbaek" soybeans packed in polyethylene (PE) and polypropylene (PPE) film bags that were stored at $4^{\circ}C$, $20^{\circ}C$ and $45^{\circ}C$ for 48 weeks. The early acid values (diene and p-anisidine) of raw soybean flour (RSF) at high temperature (HT) were higher than those at refrigerated temperature (RFT) and room temperature (RT) during 48 and 12 to 36 weeks, respectively. In the case of roasted soybean flour (ROSF), which was stored at RFT and RT, the acid and conjugated diene values gradually increased after 24 weeks. In RSF, the peroxide value increased since the beginning of the $24^{th}$ week. The p-anisidine value also increased during 12 to 36 weeks but was much lower than the values obtained from HT storage. As the peroxide values decreased, the p-anisidine values increased, indicating an inverse relationship. Lipoxygenase activity of ROSF at all storage conditions was lower than RSF. Several differences were observed between the packing materials used. This study could, therefore, provide useful information for the industrial use of soybean flour (SF).

One Case of Rhabdomyolysis After Spinning Exercise (스피닝 운동 후 발생한 횡문근융해증 치험 1례)

  • Jeong, Ho-young;Nam, Seung-kyu;Cho, Chung-sik
    • The Journal of Internal Korean Medicine
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    • v.37 no.5
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    • pp.711-716
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    • 2016
  • Objective: To report a case of rhabdomyolysis that occurred after spinning exercise. Methods: A patient diagnosed with rhabdomyolysis received Korean medical treatment and Western medical treatment for 6 days. We observed the patient for 13 days. Clinical symptoms were evaluated with a Numerical Rating Scale (NRS) and laboratory tests, which included Liver Functional Test (LFT), Renal Functional Test (RFT), creatinine phosphokinase (CPK), myoglobin, and urine tests. Results: After treatment, the clinical symptoms were improved. In this case, acute renal failure did not occur. Laboratory results, including AST, ALT, CPK, and LDH, were also improved. Conclusions: Rhabdomyolysis can be treated cooperatively with Korean and western medical cooperative treatment.

Characteristics of AlW thin film for TFT-FCD bus line

  • Kim, Dong-Sik;Yi, Chong-Ho;Chung, Kwan-Soo
    • Proceedings of the Korean Vacuum Society Conference
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    • 2000.02a
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    • pp.58-58
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    • 2000
  • Recently low resistance of bus line is required for large screen size RFT-CLD panels. As a result, lower resistance Al-alloy is currently reviewed extensively. The resistivity is required smaller than 10$\mu$$\Omega$cm and high resistance of chemical attack is required. In this paper, Al-W thin film were deposited on glass substrates by D.C magnetron sputtering system under various condition for high chemical resistance. Its properties were characterized by SEM, AFM, XRD, 4-point-probe, and cyclic voltammertry. The optimal condition of Al-W was 10$0^{\circ}C$, 100W, 0.4Pa, 23sccm(Ar) and 35$0^{\circ}C$, 20min. annealing. At that condition the resistivity of Al-W(3 wt.%) was about 11$\mu$$\Omega$cm. And when wt.% of W in Al-W alloy was higher than about 4%, Al-W alloy thin film has high chemical resistance.

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Research Infrastructure Foundation for Core-technology Incubation of Radiation Detection System

  • Kim, Han Soo;Ha, Jang Ho;Kim, Young Soo;Cha, Hyung Ki
    • Journal of Radiation Industry
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    • v.6 no.1
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    • pp.67-73
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    • 2012
  • The development of radiation detection systems mainly consist of two parts-radiation detector fabrication including material development, and its appropriate electronics development. For the core-technology incubation of a radiation detection system, radiation fabrication and an evaluation facility are scheduled to be founded at the RFT (Radiation Fusion Technology) Center at KAERI (Korea Atomic Energy Research Institute) by 2015. This facility is utilized for the development and incubation of bottleneck-technologies to accelerate the industrialization of a radiation detection system in the industrial, medical, and radiation security fields. This facility is also utilized for researchers to develop next-generation radiation detection instruments. In this paper, the establishment of core-technology development is introduced and its technological mission is addressed.

Acceptance and commitment therapy (수용전념치료)

  • Na, Euihyeon
    • Journal of Medicine and Life Science
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    • v.15 no.2
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    • pp.51-55
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    • 2018
  • Acceptance and Commitment Therapy (ACT) is a functional contextual intervention approach based on the behavioral theory on human language, which views human suffering as originating in psychological inflexibility fostered by cognitive fusion and experiential avoidance. Thus, the goal of ACT is to enhance psychological flexibility using six core processes including acceptance, cognitive defusion, self-as-context, contact with present moment, values clarification, and committed action. Recent clinical trials have suggested the efficacy for ACT in the treatment of various mental illness and psychological distress. The aim of this review is to offer more knowledge and better understanding of ACT by presenting its underlying principle and an overview of the research field.