• Journal of the Microelectronics and Packaging Society
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• v.24 no.4
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• pp.73-77
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• 2017

Recently, fingerprint sensors have widely used for personal information security, and require quality evaluation to reduce an error of their recognition rate. Quality of fingerprint sensors is evaluated by variation of their electrical resistance introducing by contacts between a probe tip and a sensor electrode, Investigation on the materials compatability and structure optimization of probe is required to reduce deformation of sensor electrode for repeatability of quality testing. Nickel, steel(SK4), beryllium copper, and phosphor bronze were considered as probe materials, and beryllium copper was the most appropriate for materials of probe tips, considering indentation and contact resistance while being contacted probe tips on electrodes. Probes of an inspection part were manufactured with the single-unit structure for physical damage prevention and parallel processing capability. Inspection repeatability was evaluated by voltage variation of fingerprint sensors when the specific current was applied. A single-unit inspection part with beryllium copper probe tips showed excellent repeatability within ${\pm}0.003V$ of its voltage variation.

• Journal of KIISE
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• v.44 no.9
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• pp.932-945
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• 2017

In this paper, a new hardware and software architecture for a stereo vision processing system including rectification, disparity estimation, and visualization was developed. The developed method, named LArge scale stereo matching method using Support Point Interpolation (LASPI), shows excellence in real-time processing for obtaining dense disparity maps from high quality image regions that contain high density support points. In the real-time processing of high definition (HD) images, LASPI does not degrade the quality level of disparity maps compared to existing stereo-matching methods such as Efficient LArge-scale Stereo matching (ELAS). LASPI has been designed to meet a high frame-rate, accurate distance resolution performance, and a low resource usage even in a limited resource environment. These characteristics enable LASPI to be deployed to safety-critical applications such as an obstacle recognition system and distance detection system for autonomous vehicles. A Field Programmable Gate Array (FPGA) for the LASPI algorithm has been implemented in order to support parallel processing and 4-stage pipelining. From various experiments, it was verified that the developed FPGA system (Xilinx Virtex-7 FPGA, 148.5MHz Clock) is capable of processing 30 HD ($1280{\times}720pixels$) frames per second in real-time while it generates disparity maps that are applicable to real vehicles.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.25 no.5
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• pp.1043-1057
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• 2015

In order to recognize intelligent threats quickly and detect and respond to them actively, major public bodies and private institutions operate and administer an Intrusion Detection Systems (IDS), which plays a very important role in finding and detecting attacks. However, most IDS alerts have a problem that they generate false positives. In addition, in order to detect unknown malicious codes and recognize and respond to their threats in advance, APT response solutions or actions based systems are introduced and operated. These execute malicious codes directly using virtual technology and detect abnormal activities in virtual environments or unknown attacks with other methods. However, these, too, have weaknesses such as the avoidance of the virtual environments, the problem of performance about total inspection of traffic and errors in policy. Accordingly, for the effective detection of intrusion, it is very important to enhance security monitoring, consequentially. This study discusses a plan for the reduction of false positives as a plan for the enhancement of security monitoring. As a result of an experiment based on the empirical data of G, rules were drawn in three types and 11 kinds. As a result of a test following these rules, it was verified that the overall detection rate decreased by 30% to 50%, and the performance was improved by over 30%.

• The Journal of the Korean bone and joint tumor society
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• v.6 no.2
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• pp.98-105
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• 2000

In the case of osteosarcoma, secondary acute myeloid leukemia which occurs as the consequences of the complication of chemotherapy, is rare. We are reporting the case that we have recently experienced in the laboratory. A case of secondary acute myeloid leukemia have been occurred to among 77 patients who have been diagnosed as osteosarcoma and received chemotherapy from 1995 to 1999. This case was compared with the cases of other reports for the analysis of its cause and results. A 17-year-old man was diagnosed as a osteosarcoma in the distal part of femur, and recieved chemotherapy. Within 28months, the hematological analysis of the case indicated the severe increase in the number of the white cell (over 200,000) and the profound decrease in the number of platelets. A test of bone marrow needle aspiration and peripheral blood smear showed a tremendous increase in the number of the monocytoid immature cell, which mostly are blasts and promonocytes. Due to this clinical results, the case was diagnosed as the secondary acute myeloid leukemia after the chemotherapy. The frequency of occurrence of secondary acute myeloid leukemia after chemotherapy is quite phenomenal. But the disease could be fatal leading to a high rate of morbidity and mortality without early diagnosis and treatment. Hence, an enough recognition of the possibility of its development, the periodical observation and inspection after chemotherapy and an immediate treatment in the case of occurrence are essential.

• Korean Journal of Construction Engineering and Management
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• v.13 no.3
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• pp.109-121
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• 2012

Overseas construction project orders have shown steady increase since 2001, and it took 44.5% of the total construction project orders in 2010. Overseas construction project needs more complex risk management because it is affected by more various circumstance factors than the domestic construction is. Previous studies have centered on the internal risk factors to assist the decision-making, but there are few researches on the importance and techniques of foreign exchange risk management. Inadequate management of foreign exchange risk has been found to cause huge damages due to the lacking recognition on the importance of foreign exchange risk management. Therefore, current study designed a foreign exchange risk manage model to help efficient management and decision-making. This model was developed as a technique to meet the demand of the increasing overseas construction projects for the efficient management of foreign exchange risk, and the technique will lower the risk with more and more accurate outcome by accumulating the data of profit-and-loss.

• Journal of Korean Society of Forest Science
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• v.106 no.3
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• pp.353-361
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• 2017

This survey was conducted to study the mountain village residents' needs and awareness of eco-tourism. The survey included opinions about introducing Eco-tourism, Residents' willingness to join, types of policies to push forward, requirements to Korea Forest Service and expected outcomes. 346 residents were selected for this survey from 33 mountain eco-villages established by Korea Forest Service and 24 rural experience villages established by Ministry of Agriculture, Food and Rural Affairs, and they respectively participated in this survey through interview from June $17^{th}$ 2015 to September $17^{th}$ 2015. As a result of major analysis, the survey showed that 86.7% of residents were in favor of the introduction of mountain village eco-tourism and 78.3% of those questioned showed the willingness of their participation of the program. Also 42.2% of respondents reacted positively that Korea Forest Service, associated administration agency and local government should be cooperated when the policies are established. 60.4% of respondents said they expect installment of recreational facilities and 67.6% said they expect development of eco-tourism program, which were respectively the highest rate as the requirements to be supported when the eco-tourism program are introduced. 86.1% said that increasing visitors will help mountain villages more revitalized as eco-tourism is introduced. This research is expected to provide information when making the mountain eco-tourism policy in the future.

• Science of Emotion and Sensibility
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• v.13 no.3
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• pp.429-440
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• 2010

It is known that as many as 1 in 91 children are diagnosed with an autistic spectrum disorder, and the incidence rate of the autistic spectrum disorder is much higher than that of cancer in Korea. It is necessary to develop a novel technology to sense their emotional status and give proper psychological diagnosis and therapy, since the children with autistic spectrum disorder usually do not express their own emotional status. This article presents the state-of-the-arts on the affective computing technologies that include recognition of emotional status through bio-sensing and virtual affective agent modeling, and then proposes a novel system architecture for diagnosis and therapy of autistic spectrum disorder. The diagnosis and therapy system of autistic spectrum disorder is composed of bio-sensing module, virtual environment module with affective agents, and haptic interface module. The architecture proposed in this paper will enhance the objectivity to diagnose autism spectrum disorders, and enable continuous treatment in daily life.

• Science of Emotion and Sensibility
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• v.13 no.3
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• pp.533-540
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• 2010

This study was designed to examine the difference in visual attention between the evaluations of facial attractiveness and facial trustworthiness, both of which may be the two most fundamental social evaluation for forming first impressions under various types of social interactions. In study 1, participants were asked to evaluate the attractiveness and trustworthiness of 40 new faces while their gaze directions being recorded using an eye-tracker. The analysis revealed that participants spent significantly longer gaze fixation time while examining certain facial features such as eyes and nose during the evaluation of facial trustworthiness, as compared to facial attractiveness. In study 2, participants performed the same face evaluation tasks, except that a word was briefly displayed on a certain facial feature in each face trial, which were then followed by unexpected recall tests of the previously viewed words. The analysis demonstrated that the recognition rate of the words that had been presented on the nose was significantly higher for the task of facial trustworthiness vs. facial attractiveness evaluation. These findings suggest that the evaluation of facial trustworthiness may be distinguished by that of facial attractiveness in terms of the allocation of attentional resources.

• The Korean Journal of Zoology
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• v.33 no.4
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• pp.499-508
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• 1990

Surveys of elecirophoretic variations in isozymes and proteins encoded by 25 persumtive loci were conducted to estimate the degree of genic variation and to assess species recognition for three species of the Family Gasterosteidae (Pisces) in Korea. The average degree of genic variation of Gasterosteus aculeatus was HD = 0.086, HG = 0.084, and P =36% and it was similar to Pungitius sinensis (HD = 0.080, HG = 0.091, P = 29%). But P.kaibarae was less variable than these species (HD = 0.034; HG = 0.034, P = 13%). The average genetic similarities among the populations in each species of Gasterosteus aculeatus pungitius sinensis and P. kaibarae were S = 0.963, S = 0.953 and S = 0.800 respectively.Yongchon and Kyongiu populations of P. kaibarae were genetically remote from the rest of the conspecific populations (S = 0.690). Chae (1988) also observed morphological differences between them. The value of genetic similariiy coefficients of S = 0.606 between P. sinensis and P. kaibarae is low enough to consider as specific level of genetic difference, but moderate rate of hybridization (44%) between them at a synpatric area of Kangnung indicates that isolating mechanism is incomplete. Therefore it is concluded that P. sinensis and P. kaffarae are semispecitic status. Intergeneric genetic similarities between the genus Gasrerosteus and Pungitius were S = 0.052 and this value is the lowest estimate up to date in freshwater fishes.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.5
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• pp.2393-2399
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• 2013

In this paper, we proposed a method to screening of Alzheimer's disease (AD) from Raman spectra of platelet with synthesis of basis spectra using singular value decomposition (SVD). Raman spectra of platelet from AD transgenic mice are preprocessed with denoising, removal background and normalization method. The column vectors of each data matrix consist of Raman spectrum of AD and normal (NR). The matrix is factorized using SVD algorithm and then the basis spectra of AD and NR are determined by 12 column vectors of each matrix. The classification process is completed by select the class that minimized the root-mean-square error between the validation spectrum and the linear synthesized spectrum of the basis spectra. According to the experiments involving 278 Raman spectra, the proposed method gave about 97.6% classification rate, which is better performance about 6.1% than multi-layer perceptron (MLP) with extracted features using principle components analysis (PCA). The results show that the basis spectra using SVD is well suited for the diagnosis of AD by Raman spectra from platelet.