• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2013년도 추계학술발표대회
• /
• pp.214-217
• /
• 2013

Advancements in automobile industries and the communication technologies caused VANET (Vehicular Ad Hoc NETwork) to evolve to VANET-based clouds before its deployment. It is more likely that VANET clouds will replace the traditional VANET in the deployment phase. It is to be noted that an abrupt deployment is out of question because it would require mass of resources and money to do so; instead incremental deployment is more ideal. In this paper, we aim at the incremental deployment phase of VANET clouds and focus on the well-established public transport networks. Data aggregation is one of the essential aspects in traditional VANET and has been researched for quite long time. However the previously proposed schemes are still controversial. Keeping in mind the time and space prediction of public buses, we leverage these buses as potential aggregators and MG (Mobile Gateways) in VANET clouds. Buses gather cooperative whereabouts information from neighbors, aggregate that information, disseminate it to the neighbor MGs and also send it to the cloud for storage and for services exchange. In our proposed scheme, we believe that the dissemination will be effective and cover most of the urban area since at any instant of time; buses cover most part of the urban areas. Besides, the effective transmission range is higher due to tall buses.

• 식품과학과 산업
• /
• 제50권1호
• /
• pp.16-25
• /
• 2017

There is no doubt that accumulation of big data using multi-omics technologies will be useful to solve human's long-standing problems such as development of personalized diet and medicine, overcoming diseases, and longevity. However, in the food industry, big data based on omics is scarcely accumulated. In particular, comprehensive analysis of molecular lipid metabolites directly associated with food quality, such as taste, flavor, and texture has been very limited. Moreover, most of food lipidomics studies are applied to analyze lipid components and discriminate authenticity and freshness of limited foods including vegetable and fish oil. However, if lipid big data through food lipidomics research of various foods and materials can be accumulated, lipidomics can be used in the optimization of food processing, production, delivery system, food safety, and storage as well as functional food.

• 한국축산식품학회지
• /
• 제42권4호
• /
• pp.689-711
• /
• 2022

The purpose of our study was to determine the impact of rosemary extract in duck eggs, as determined by in vitro antioxidant capacity, lipid oxidation, fatty acid profiles, and flavor analyses. Three groups of salted duck eggs were compared: A control group and group enriched with 0.1% and 0.5% (w/v) rosemary extracts for 28 days of salting. In a time-dependent manner, the radical scavenging activity and reduction power of eggs with 0.5% (w/v) rosemary extract were significantly higher those of the control at 28 days after salting. The fatty acid profiles of salted egg were significantly affected by rosemary extract and salting time. Palmitic acid was the most abundant fatty acid in salted egg treated with rosemary extract, followed by linoleic acid and arachidonic acid. Furthermore, the treated eggs contained more docosahexaenoic acid than the control ones. And the treated eggs also have a considerable impact on the lipid oxidation process (primary and secondary oxidation). As a result, rosemary extract can be used as a natural antioxidant spice to prevent oxidation and extend the shelf life of eggs during storage. Furthermore, flavor research using solid phase microextraction - gas chromatography - mass spectrometry and an electronic nose demonstrated that adding rosemary extract to salted eggs could give them a distinct flavor.

• Nuclear Engineering and Technology
• /
• 제55권6호
• /
• pp.2088-2095
• /
• 2023

The safety of nuclear installations is largely determined by the tightness of fuel elements cladding. As the Fukushima nuclear accident showed, the main task in case of loss of power supply is to ensure reliable removal of residual heat release from spent fuel pool (SFP) with irradiated fuel assemblies (IFAs). The paper presents the results of calculated-experimental studies and thermal-hydraulic modeling of temperature storage modes of IFAs in SFP. Experimental studies of SFP's temperature regime and calculated evaluation of residual heat removal due to the thermal conductivity of building structures surrounding the SFP were performed. To ensure the safe operation of research reactors, it's necessary to know the IFA's residual heat power (RHP) in the reactor and SFP, which is determined depending on the operating time of fuel assemblies (FAs) and the IFAs calculated holding time. The FAs operating time depends on the reactor energy output. The IFAs calculated holding time is determined by the fuel burnup, U-235 mass in the fuel, and reactor utilization factor. The IFAs fuel burnup was calculated using the MCU-PTR program. Also presented are the RHP's calculation results using some of the empirical dependencies. The concept of a passive heat removal system (PHRS) based on thermosyphon's operating principle was proposed.

• 반도체디스플레이기술학회지
• /
• 제22권4호
• /
• pp.53-58
• /
• 2023

The storage capacity of 3D-NAND flash memory has been enhanced by the multi-layer dielectrics. The deposition process has become more challenging due to the tight process margin and the demand for accurate process control. To reduce product costs and ensure successful processes, process diagnosis techniques incorporating artificial intelligence (AI) have been adopted in semiconductor manufacturing. Recently there is a growing interest in process diagnosis, and numerous studies have been conducted in this field. For higher model accuracy, various process and sensor data are required, such as optical emission spectroscopy (OES), quadrupole mass spectrometer (QMS), and equipment control state. Among them, OES is usually used for plasma diagnostic. However, OES data can be distorted by viewport contamination, leading to misunderstandings in plasma diagnosis. This issue is particularly emphasized in multi-dielectric deposition processes, such as oxide and nitride (ON) stack. Thus, it is crucial to understand the potential misunderstandings related to OES data distortion due to viewport contamination. This paper explores the potential for misunderstanding OES data due to data distortion in the ON stack process. It suggests the possibility of excessively evaluating process drift through comparisons with a QMS. This understanding can be utilized to develop diagnostic models and identify the effects of viewport contamination in ON stack processes.

• 한국자원식물학회:학술대회논문집
• /
• 한국자원식물학회 2010년도 정기총회 및 춘계학술발표회
• /
• pp.14-14
• /
• 2010

Plastid proteomics are essential organelles present in virtually all cells in plants and green algae. Plastids are responsible for the synthesis and storage of key molecules required for the basic architecture and functions of plant cells. The proteome of plastid, and in particular of chloroplast, have received significant amounts of attention in recent years. Various fractionation and mass spectrometry (MS) techniques have been applied to catalogue the chloroplast proteome and its sub-organelles compartments. To better understanding the function of the lumenal sub-organelles within the thylakoid network, we have carried out a systematical analysis and identification of the lumenal proteins in the thylakoid of wheat by using Tricine-SDS-PAGE, and LTQ-ESI-FTICR mass spectrometry followed by SWISS-PROT database searching. We isolation and fractionation these membrane from fully developed wheat leaves using a combination of differential and gradient centrifugation couple to high speed ultra-centrifuge. After collecting all proteins to eliminate possible same proteins, we estimated that there are 407 different proteins including chloroplast, chloroplast stroma, lumenal, and thylakoid membrane proteins excluding 20 proteins, which were identified in nucleus, cytoplasm and mitochondria. A combination of these three programs (PSORT, TargetP, TMHMM, and TOPPRED) was found to provide a useful tool for evaluating chloroplast localization, transit peptide, transmembranes, and also could reveal possible alternative processing sites and dual targeting. Finally, we report also sub-cellular location specific protein interaction network using Cytoscape software, which provides further insight into the biochemical pathways of photosynthesis. The present work helps understanding photosynthesis process in wheat at the molecular level and provides a new overview of the biochemical machinery of the thylakoid in wheat.

• 한국토양환경학회지
• /
• 제1권1호
• /
• pp.89-102
• /
• 1996

지하의 유체 유동 및 물질 변환을 해석하기 위하여 다중다상이론을 이용한 통합 모형을 개발하였다 종합적 지배식은 4개의 상내의 화합물들의 물질 및 힘평형 관계를 고려하여 유도되었다. 복합한 이동 및 변환 현상을 설명하고, 공간적 차원을 변동적으로 나타내기 위하여 관계된 모든 변수 및 식들을 함축적이면서 조직적으로 표현하였다. 도출된 비선형시스템은 다차원 유한요소프로_I램으로서 해를 구하였다. 본 개발된 프로그램은 역동적으로 메모리 용량을 조절하여 일이삼차원 문제를 PC부터 SP2슈퍼컴퓨터까지 여러 종류의 기종에서 해석할 수 있다. 계산시간과 저장용량을 줄이기 위하여 시스템식을 분리시키고, 슈퍼컴의 벡터 및 병렬처리를 이용하여 띠행렬의 해를 구하였다. 유속이 우세한 경우의 수치해석상의 불안정한 문제를 해결하기 위하여 상류가중, 질량묶음, 요소별 파라미터 평가법 등을 적용하였다. 일차원 이동문제에 대하여 유한요소법과 유한차분법의 수치해의 안정성 조건을 검토하였다. 구체적인 지하수 유동 및 오염문제에 대한 모델링 예는 본 논문집의 연계 논문에 수록하였다.

• 한국환경농학회지
• /
• 제42권4호
• /
• pp.259-268
• /
• 2023

Rhodococcus sp. 3-2 strain has been reported to degrade benzimidazole-based pesticides, such as benomyl and carbendazim. Therefore, this study aimed to optimize culture medium composition and culture conditions to achieve cost-effective and efficient large-scale production of the Rhodococcus sp. 3-2 strain. The study identified that the optimal media composition for mass culture comprised 0.5% glucose, 0.5% yeast extract, 0.15% NaCl, 0.5% K₂HPO₄, 0.5% sodium succinate, and 0.1% MgSO₄. Additionally, a microbial agent was developed using a 1.5-ton fermenter, with skim milk (20%), monosodium glutamate (15%), and vitamin C (2%) as key components. The storage stability of the microbial agent has been confirmed, with advantages of low temperature conservation, which helps to sustain efficacy for at least six months. We also assessed the benomyl degradation activity of the microbial agent within field soil. The results revealed an over 90% degradation rate when the concentration of viable cells exceeded 2.65 × 10⁶ CFU/g after a minimum of five weeks had elapsed. Based on these findings, Rhodococcus sp. 3-2 strain can be considered a cost-effective microbial agent with diverse agricultural applications.

• 한국작물학회지
• /
• 제62권2호
• /
• pp.105-112
• /
• 2017

본 연구는 쌀과 현미의 연산 또는 신 구곡 판별법을 개발하기 위하여 쌀의 저장기간 동안 변화되는 지방의 일종인 인지질 성분을 지표물질로 이용하여 쌀과 현미의 신 구곡 판별식을 작성하였고 미지의 시료를 이용하여 판별식 검증을 수행하였다. 또한 벼의 저장 온도와 시기에 따른 인지질 지표의 판별정확도를 분석함으로써 인지질 지표의 실용적인 활용 가능성을 연구한 결과를 요약하면 다음과 같다. 1. 인지질 지표를 이용하여 쌀에 대한 판별식을 작성한 결과 쌀의 연산별 분류적중률은 90%, 신 구곡의 분류적중률은 97%로 나타나 연산 판별식보다 신 구곡 판별식의 적중률이 높게 나타났다. 따라서 신 구곡 판별식을 쌀의 판별식으로 확립하였고 연산을 알고 있는 미지의 시료를 이용하여 개발된 판별식의 정확도를 분석한 결과 판별식 정확도는 1차 분석에서는 82%, 2차 분석에서는 80%로 나타났다. 2. 현미에 대한 인지질 지표의 신 구곡 분류적중률은 96%로 나타나 95%이상의 적중률을 보여주었으므로 현미의 신 구곡 판별식을 확립하였다. 미지의 시료를 이용하여 개발된 판별식의 정확도를 분석한 결과 93%로 나타나 판별 정확도가 쌀에 비해 높게 나타났다. 현미는 백미에 비해 지방 함량이 많기 때문에 신곡과 구곡 간의 인지질 함량의 차이가 크게 나타나는 경향이었다. 3. 저장온도와 시기에 따른 쌀의 판별 정확도를 분석하기 위하여 벼 보관창고에서 동일한 시료를 수집하여 기확립된 쌀의 신 구곡 판별식에 대입하였을 때 상온 보관된 쌀의 정확도는 57.9~92.1%로 나타났고, 저온 보관된 쌀의 정확도는 86.8~94.7%의 범위로 나타났다. 쌀의 경우 저장 온도와 시기에 따라 판별되는 정확도가 달라졌고 저온 보관된 시료가 상온 보관된 시료에 비해 시기별 판별 정확도의 차이가 적은 것으로 나타났다. 4. 현미의 저장온도 및 시기에 따른 판별 정확도를 분석하기 위하여 벼 보관창고에서 동일한 시료를 수집하여 기 확립된 현미의 신 구곡 판별식에 대입하였을 때 상온 보관된 현미의 정확도는 94.7~100%로 나타났고, 저온 보관된 현미의 정확도는 92.1~100%의 범위로 나타났다. 현미의 경우 쌀에 비해 지방함량이 많고 강층의 존재로 산패가 더디게 진행되기 때문에 저장온도 및 시기에 상관없이 92%이상의 판별 정확도를 나타내었다.

• 한국식품저장유통학회지
• /
• 제19권2호
• /
• pp.249-256
• /
• 2012

본 연구는 전자선 조사된 자두의 저장기간에 따른 휘발성 유기화합물의 변화를 확인하기 위하여 SDE 방법으로 추출하고 GC/MS로 분석하였다. 비조사 자두와 0.25, 0.5, 0.75 및 1 kGy로 전자선 조사된 자두의 휘발성 화합물을 동정한 결과 각각 44, 46, 45, 47 및 38종으로 동정되었다. 30일 저장기간 후 자두의 휘발성 화합물은 선량별로 각각 48, 40, 40, 39 및 40종이 확인되어 저장기간에 따른 유기성분의 조성은 유사하였으며 선량에 따른 유의적 차이는 없었다. 자두의 주된 휘발성 유기성분은 $C_6$ 구조의 hexanal과 (E)-2-hexenal, (Z)-3-hexenal, (E)-2-hexen-1-ol 및 (Z)-3-hexen-1-ol로 hexanal, (E)-2-hexenal 및 (Z)-3-hexen-1-ol은 조사 시 모든 선량에서 증가하였으며 hexanol, (E)-2-hexen-1-ol은 감소함을 확인하였다. lactone류 중 저장기간 동안 비조사 시료에서 ${\gamma}$-hexalactone, ${\gamma}$-octalactone 및 ${\gamma}$-decalactone가 확인되었다. 비조사 및 전자선 조사된 자두의 저장기간 동안 휘발성 유기성분의 감소함을 확인하였고, hexanoic acid와 2-hexenoic acid는 확인되지 않았으며 2-methylpyrrole은 0.5 kGy 이상 조사한 시료에서 확인되었다. 따라서 자두의 1 kGy까지의 저선량 전자선 조사는 휘발성 유기성분의 변화에 영향을 미치지 않는 것으로 사료되며 자두의 저장기간 연장을 위하여 유용한 선량임을 확인하였다.