• Journal of the Korean Applied Science and Technology
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• v.31 no.1
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• pp.44-49
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• 2014

We were investigated by cyclic voltammetry to the stability through the electrochemical characteristics of phospholipid(L-${\alpha}$-phosphatidylethanolamine, LAPE) monolayer LB films. LAPE monolayer LB films was deposited by the LB method on the indium tin oxide(ITO) glass. The electrochemical properties was measured by cyclic voltammetry with a three-electrode system in 0.5 N, 1.0 N, 1.5 N and 2.0 N $KClO_4$ solution. The measuring range is continuously oxidized to 1650 mV, with an initial potential of -1350 mV was reduced. Scanning rates of 50, 100, 150, 200, and 250 mV/s was set. As a result, LB monolayer films of LAPE was appeared on irreversible processes by the oxidation current from the cyclic voltammogram. Diffusion coefficient (D) of LAPE was calculated 195, 15.9, 5.75, 1.38 and $0.754cm^2s^{-1}{\times}10^{-9}$ at 0.01 N, 0.05 N, 0.10 N, 0.15 N and 0.20 N $KClO_4$ solutions, respectively.

• Korean journal of applied entomology
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• v.55 no.4
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• pp.351-358
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• 2016

Consistent with a previous study on the brown planthopper Nilaparvata lugens (BPH) (Seo et al., 2009), we identified seven distinct EPG waveforms (np, L1, L2, L3, L4-a, L4-b, and L5) in adult female Laodelphax striatellus (SBPH) that fed on rice plants, by using the direct current electrical penetration graph (DC-EPG) system. The shape of waveforms and the pattern of occurrence of each waveform of SBPH were very similar to those of BPH. L3 and L4-a always occurred prior to L4-b. Periodical honeydew excretion was observed in L4-b only. Microsection observation following laser stylectomy revealed that the tips of SBPH stylets severed in L3, L4-a, and L4-b were commonly located in or near the phloem region of rice plants, but were located in the xylem in L5. Plant sap flowed from the stylets severed in L4-b only, and its main carbohydrate component was detected as sucrose by HPLC analysis. These results and the patterns of EPG waveform progress in SBPH suggested that feeding activities on rice plant tissue were relevant to each EPG waveform. L1 and L2 corresponded to the initiation of stylet penetration and stylet movement with salivation on the outside of the vascular bundle. L3 and L4-a were related to feeding activities within the phloem region in preparation for phloem sap ingestion. L4-b was closely associated with phloem sap ingestion, and L5 corresponded to xylem feeding behavior.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.2
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• pp.15-23
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• 2017

The person Re-identification is the most challenging part of computer vision due to the significant changes in human pose and background clutter with occlusions. The picture from non-overlapping cameras enhance the difficulty to distinguish some person from the other. To reach a better performance match, most methods use feature selection and distance metrics separately to get discriminative representations and proper distance to describe the similarity between person and kind of ignoring some significant features. This situation has encouraged us to consider a novel method to deal with this problem. In this paper, we proposed an enhanced recurrent neural network with three-tier hierarchical network for person re-identification. Specifically, the proposed recurrent neural network (RNN) model contain an iterative expectation maximum (EM) algorithm and three-tier Hierarchical network to jointly learn both the discriminative features and metrics distance. The iterative EM algorithm can fully use of the feature extraction ability of convolutional neural network (CNN) which is in series before the RNN. By unsupervised learning, the EM framework can change the labels of the patches and train larger datasets. Through the three-tier hierarchical network, the convolutional neural network, recurrent network and pooling layer can jointly be a feature extractor to better train the network. The experimental result shows that comparing with other researchers' approaches in this field, this method also can get a competitive accuracy. The influence of different component of this method will be analyzed and evaluated in the future research.

• Journal of the Korean Association of Geographic Information Studies
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• v.16 no.2
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• pp.75-87
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• 2013

This study developed a GIS-based suitability assessment model of coastal zoning system that is needed in the substantial classification of coastal zoning system according to the establishment of law about coastal zoning system. First, this study investigated several kinds of regulations, GIS database and application system related coastal area. Also, grid data model was selected as the GIS analytical model for calculating items of suitability assessment of coastal zoning system. And Grid-based analytical method was suggested for calculating items composing of sea and spatial location characteristics including physical one. Critical values of items were presented using standards that were suggested in coastal regulations and land suitability assessment. Especially, this study presented a calculation method of continuous pattern as fuzzy set function for reflecting the characteristics of GIS data. And this study classified the suitability grade using Z-score and developed model designating coastal zone as conservation management priority, utilization management priority, and planning management priority. This study is judged that very efficient business performance is possible if we consider the spatial coverage of study area and GIS database when the suitability assessment model of coastal zoning system that is suggested in this study, is applied to business works.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.49 no.7
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• pp.39-47
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• 2012

The combination of the broadband property and the wide area coverage of satellite communications enables high speed transmission. Every user in the region under the satellite beam coverage can tranceiver and one can simultaneously communicate with multiple users. For these reasons, it is one of commendable telecommunication networks for information transfer. Since the satellite communications use open channels, it is likely to cause jamming with unwanted interference signals. In the thesis, APSK (Amplitude Phase Shift Keying) is employed, which is recommended for DVB-S2 due to high-speed transmission and excellent bandwidth efficiency. For obtaining reliable communication under the jamming environments, the communication satellite transponder rests on the polyphase filter bank structure, which enables switching among the subchannels and gain control on each subchannel, resulting in effectively eliminating jamming. Furthermore, the nulling scheme, one of the various anti-jamming approaches, is investigated, in which unwanted jamming signals are eliminated in the frequency domain after passing through the analysis part of the polyphase filter bank. The performance of the nulling scheme is evaluated for tone jamming and partial band jamming in terms of BER and EVM. The simulation results indicate that the nulling scheme improve the BER and EVM performance over the case without any anti-jamming approach.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.10A
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• pp.1131-1138
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• 2004

In Hierarchical Mobile Ipv6 (HMIPv6) networks, the mobility anchor point (MAP) handles binding update (BU) procedures locally to reduce signaling overhead for mobility. However, as the number of mobile nodes (MNs) handled by the MAP increases, the MAP suffers from the overhead not only to handle signaling traffic but also to Process data tunneling traffic. Therefore, it is important to control the number of MNs serviced by the MAP, in order to mitigate the burden of the MAP. We propose an adaptive load control scheme, which consists of two sub-algorithms: threshold-based admission control algorithm and session-to-mobility ratio (SMR) based replacement algorithm. When the number of MNs at a MAP reaches to the full capacity, the MAP replaces an existing MN at the MAP, whose SMR is high, with an MN that just requests binding update. The replaced MN is redirected to its home agent. We analyze the proposed load control scheme using the .Markov chain model in terms of the new MN and the ongoing MN blocking probabilities. Numerical results indicate that the above probabilities are lowered significantly compared to the threshold-based admission control alone.

• Journal of Haehwa Medicine
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• v.5 no.2
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• pp.497-497
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• 1997

간질성폐질변(間質性肺疾變)은 결체조직질병(結締組織疾病)의 상견(常見)되는 병발증(倂發證)이지만, 지금까지는 이상적(理想的)인 치료법(治療法)이 없었다. 본(本) 연구(硏究)는 본병(本病)의 병리기전(病理機轉)이 중의(中醫)에서의 "어혈(瘀血)"증(證) 상호(相互) 유사(類似)한 것으로부터 시작(始作)하여, 중의(中醫)의 "활혈화어법(活血化瘀法)"과 결합(結合)하여 치료(治療)하면서 환자(患者)의 폐기능(肺氣能) 검사결과(檢査結果)의 변화(變化)를 추적(追跡)해, 그 치료효과(治療效果)에 대(對)한 평가(評價)를 내리는 작업(作業)으로 이루어졌다. 먼저 풍습과(風濕科)에 의뢰(依賴)하여 결체조직질병(結締組織疾病)에 간질성폐병(間質性肺病)이 병발(倂發)한 환자(患者)를 선별(選別)한 후(後)에, 서의치료(西醫治療) 통(通)해서 그 원발성(原發性) 질병(疾病)이 은정(隱靜)한 상태(狀態)에까지 이르도록 한 후(後), 필요(必要)한 최저량(最低量)의 서의약(西醫藥)만을 유지(維持)케 하였다. 환자(患者)의 의사(意舍)에 따라서 두 개의 조(組)로 나누어, 실험군(實驗群)은 중의(中醫)에서 회진(會診)하고, Raynaud 증후군(症候群)의 유무(有無)에 따라서, 당귀사역탕(當歸四逆湯) 혹(或)은 혈부축어탕(血府逐瘀湯)을 농축분제(濃縮粉劑)로 투여(投與)하며 연속(連續)하여 6개월간(個月間) 치료(治療)하였다. 대조군(對照群)의 경우(境遇)에는 중의(中醫)가 회진(會診)하지 않았다. 14개월(個月)동안 모두 실험군(實驗群) 23례(例)와 대조군(對照群) 16례(例)를 대상(對象)으로 연구(硏究)를 하였는데, 모두 여성환자(女性患者)였다. 압축성폐용량(壓軸性肺用量)(FVC), 폐총용량(肺總用量)(TCL), carbon monoxide에 대(對)한 폐(肺)의 확산능력(擴散能力)(DLCO), 그리고 폐포공기량(肺泡空氣量)(VA)에 대(對) DCLO의 비(比)를 지표(指標)로 삼아, 폐기능(肺氣能)의 손상정도(損傷程度)에 따라서 box plot으로 분석(分析)하고, 폐기능(肺氣能)의 손상(損傷)을 측정(測定)하는 시스템을 만들었다. 실험결과(實驗結果), 실험군(實驗群)이 대조군(對照群)에 비(比)해서 치료(治療) 전(前)보다 명현(明顯)한 개선(改善)이 있었다. 폐기능(肺氣能)을 검사(檢査)한 수치(數値)들을 일반적(一般的)으로 통계처리(統計處理)한 것을 응용(應用)하고, TCL과 FVC의 모형식(模型式)을 만든 결과(結果), 실험군(實驗群)에서 FVC가 치료과정(治療過程)의 기간(其間)과 정비례(正比例)하여 향상(向上)되고, 또한 치료효과(治療效果)가 명현(明顯)하게 나타나기 시작(始作)하는 시기(時期)가 중의(中醫) 치료과정(治療過程)을 거친 실험군(實驗群)의 제(第)12개(個)에서 DLCO와 DLCO/VA의 향상(向上)이 나타나는 시기(時期)와 거의 일치(一致)하는 것을 발견(發見)하였다.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.35 no.8
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• pp.825-829
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• 2011

We performed a dynamic characterization of passive flow-rate regulators, which compensate for inlet pressure variation and maintain a constant flow rate for precise liquid control in microfluidic systems. To measure the flow rate for a short time, much less than the period of the dynamic inlet pressure, we use the particle image velocimetry (PIV) method. DI water containing fluorescent beads with a $0.7-{\mu}m$ diameter was supplied to the flow-rate regulators, and two successive images of the particles were taken by a pulse laser and a fluorescent microscope to measure the flow velocity. For a dynamic inlet pressure of frequency 60 Hz, the flow velocity was constant with an average of 0.194 ${\pm}$ 0.014 m/s as the inlet pressure varied between 20 kPa to 50 kPa. The flow-rate regulators provided a constant flow rate of $5.82{\pm}0.29\;{\mu}l/s$ in the frequency range of the inlet pressure from 1 Hz to 60 Hz.

• Journal of Digital Convergence
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• v.15 no.2
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• pp.173-181
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• 2017

In this paper, we have studied tracking as a training stage of considering the position and the scale of a person given its previous position, scale, as well as next and forward image fraction. Unlike other learning methods, CNN is thereby learning combines both time and spatial features from the image for the two consecutive frames. We introduce multiple path ways in CNN to better fuse local and global information. A creative shift-variant CNN architecture is designed so as to alleviate the drift problem when the distracting objects are similar to the target in cluttered environment. Furthermore, we employ CNNs to estimate the scale through the accurate localization of some key points. These techniques are object-independent so that the proposed method can be applied to track other types of object. The capability of the tracker of handling complex situations is demonstrated in many testing sequences. The accuracy of the SVM classifier using the features learnt by the CNN is equivalent to the accuracy of the CNN. This fact confirms the importance of automatically optimized features. However, the computation time for the classification of a person using the convolutional neural network classifier is less than approximately 1/40 of the SVM computation time, regardless of the type of the used features.

• Korean Journal of Childcare and Education
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• v.7 no.2
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• pp.181-203
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• 2011

The purposes of this study were to examine the perception of directors and child care providers regarding the Seoul-type Child Care Accreditation and its operating system. The objects were 309 directors and child care providers at accredited Seoul-type child care centers. The collected data was analyzed using frequency, percentiles, and ${\chi}^2$. The results are as follows: First, the majority of directors and child care providers perceived 'the preparation for effective quality control of child-care service' as the primary purpose of the Seoul-type Child Care Accreditation. Many of them responded that the child care centers meeting the purpose of accreditation would be 'private' and 'home-based' ones. Seoul-type Child Care Accreditation was easier to pass compared to National Child Care Accreditation. The directors and child care providers perceived that the accreditation will narrow the gap between public and private child care centers. Second, in operating customized child-care service, most directors preferred 'submits only the same plan as that of a designated one', but most child care providers preferred 'assessment after providing customized child-care'. For the reliable child-care service and accounting management system, both subject groups showed general satisfaction with 'current system'. Third, both subject groups responded that 'overtime pay for child care providers' and 'government's consistent child-care policy' were what they desire most to improve Seoul-type Child Care Accreditation.