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A Study on Factors to Periodontal Diseases in Patients with Metabolic Syndrome in Health Examination Examinees (일부 건강검진 수검자에서 대사증후군 대상자의 치주질환 발생에 영향을 미치는 요인)

  • Lee, Jae-Sung;Kang, Hyun-Kyung
    • Journal of the Korea Convergence Society
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    • v.9 no.7
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    • pp.259-268
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    • 2018
  • The purpose of this study was to identify effective ways to prevent periodontal disease in adults with risk factors for metabolic syndrome based on health examination examinees of some area. The study participants included 9,902 subjects who had received health checks at the Korea Association of Health Promotion from January 1 to December 31, 2014. All data were analyzed by descriptive statistics, chi-square test, logistic regression using IBM SPSS 24.0 Ver. As a result, it was found that regular oral examination (0.579), use of oral products (0.499), and oral health education (0.358) are most likely to affect the incidence of periodontal diseases among those affected by metabolic syndrome. The odds ratio of periodontal disease increased 1.79 times without regular oral examination, 1.61 times without oral products, and 1.43 times without oral health education (p<0.001). In conclusion, the results suggest that people with metabolic syndrome have a high risk of periodontal disease and that regular checkups, use of oral products, and oral health education are very important to prevent periodontal disease.

Design for Access Control System based on Voice Recognition for Infectious Disease Prevention (전염성 확산 차단을 위한 음성인식 기반의 출입통제시스템 설계)

  • Mun, Hyung-Jin;Han, Kun-Hee
    • Journal of the Korea Convergence Society
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    • v.11 no.7
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    • pp.19-24
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    • 2020
  • WHO declared a global pandemic on March 11th for Corona 19. However, there is a situation where you have to go to building for face-to-face education or seminars for economic and social activities. The first check method of COVID-19 infection is to measure body temperature, so the primary entrance and exit is blocked for near-field body temperature measurement. However, since it is troublesome to check directly, thermal camera is installed at the entrance of the building, and body temperature is measured indirectly using the infrared camera to control access. In case of middle and high schools, universities, and lifelong education center, we need a system that is possible to interoperate with attendance checks and automatically recognizes whether to wear masks and can authenticate students. We proposed the system that is to confirm whether to wear a mask with a camera that is embedded in a smart mirror, and that authenticates the user through voice recognition of the user who wants to enter the building by using voice recognition technology and determines whether to enter them or not. The proposed system can check attendance if it is linked with near-field temperature measurement and attendance check APP of student's smart phone.

CONSERVATIVE ENDODONTIC TREATMENT OF PERMANENT TEETH WITH PERIAPICAL LESIONS : CASE REPORTS (치근단 병소를 가진 영구치의 보존적 치수 치료)

  • Yoon, Young-Mi;Lee, Nan-Young;Lee, Sang-Ho
    • Journal of the korean academy of Pediatric Dentistry
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    • v.38 no.3
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    • pp.276-283
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    • 2011
  • Recently, undifferentiated stem cells which exist in dental papillae of immature permanent teeth were newly discovered and these stem cells appear to be the origin of ameloblasts associated with the formation of root dentin. When treating immature permanent teeth, the preservation of these stem cells induce the continuous formation of the root. Therefore, it is reported that minimal invasion to periapical region in immature permanent teeth with periapical inflammation resulted in good-healing pattern in clinical and radiographic examination. In this case, a 10 year-old boy(mandibular right premolar) and a 8 year-old girl(maxillary left premolar) who visited the department of pediatric dentistry at Chosun University Dental Hospital were diagnosed with pulp necrosis and periapical abscess in clinical and radiographic examination. Endodontic instrumentation to the periapical region was limited and MTA(Mineral Trioxide Aggregate) was applied into the pulp canal. The periodic checks showed healing of periapical abscess and the development and growth pattern of roots. In permanent teeth with pulp necrosis and periapical abscess, preservation of pulp and dental papillae in the periapical region showed good prognosis during the periodic examinations. Therefore, a lot of clinical examination and long-term evaluation of conservative pulp treatment in immature permanent teeth are expected to be necessary.

Impact of NIE on entrepreneurship and career awareness in Adolescent: Mediated effect of self-efficacy (청소년의 신문활용교육(NIE)이 기업가정신 및 진로인식에 미치는 영향: 자기효능감을 매개효과로 하여)

  • Kim, Yong-Ho;Kim, Jong-Keun
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.11 no.5
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    • pp.153-164
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    • 2016
  • It is critical for adolescents to foster self-efficacy, creativity, and adventurous spirit as well as plans for appropriate career path in order to become good members of society. During this adolescent period, newspapers will be a good learning material as they deliver various and timely information in refined language. In this paper, we analyzed the impact of NIE on development of self-efficacy, awareness of career path, and entrepreneurship through comparing adolescents who regularly read newspapers with those who do not. We came up with the following result after analysis of surveys (with a sample size of 283) that targeted middle school and higher grade elementary school students across Korea. We confirmed that reading newspapers has a positive impact on development of self-efficacy, awareness of career path, and entrepreneurship. More specifically, reading newspapers regularly has a positive impact on development of self-efficacy that subsequently has a positive impact on development of awareness of career path and entrepreneurship. Therefore, we found that simply reading newspapers regularly has a positive impact on development of self-efficacy, awareness of career path, and entrepreneurship with no special programs utilizing the newspapers. This is because various information and opinions in newspapers help adolescents to develop their own views, improve understanding and awareness of career, and development of sociality including creativity and adventurous spirit. There is the meaning as the first research that this research checks what the NIE of the adolescents affects the positive impact to not only the self-efficacy and career awareness but also entrepreneurship.

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Application of CSP Filter to Differentiate EEG Output with Variation of Muscle Activity in the Left and Right Arms (좌우 양팔의 근육 활성도 변화에 따른 EEG 출력 구분을 위한 CSP 필터의 적용)

  • Kang, Byung-Jun;Jeon, Bu-Il;Cho, Hyun-Chan
    • Journal of IKEEE
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    • v.24 no.2
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    • pp.654-660
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    • 2020
  • Through the output of brain waves during muscle operation, this paper checks whether it is possible to find characteristic vectors of brain waves that are capable of dividing left and right movements by extracting brain waves in specific areas of muscle signal output that include the motion of the left and right muscles or the will of the user within EEG signals, where uncertainties exist considerably. A typical surface EMG and noninvasive brain wave extraction method does not exist to distinguish whether the signal is a motion through the degree of ionization by internal neurotransmitter and the magnitude of electrical conductivity. In the case of joint and motor control through normal robot control systems or electrical signals, signals that can be controlled by the transmission and feedback control of specific signals can be identified. However, the human body lacks evidence to find the exact protocols between the brain and the muscles. Therefore, in this paper, efficiency is verified by utilizing the results of application of CSP (Common Spatial Pattern) filter to verify that the left-hand and right-hand signals can be extracted through brainwave analysis when the subject's behavior is performed. In addition, we propose ways to obtain data through experimental design for verification, to verify the change in results with or without filter application, and to increase the accuracy of the classification.

Generalized Borůvka's Minimum Spanning Tree Algorithm (일반화된 Borůvka 최소신장트리 알고리즘)

  • Choi, Myeong-Bok;Lee, Sang-Un
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.12 no.6
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    • pp.165-173
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    • 2012
  • Given a connected, weighted, and undirected graph, the Minimum Spanning Tree (MST) should have minimum sum of weights, connected all vertices, and without any cycle taking place. Borůvka Algorithm is firstly suggested as an algorithm to evaluate the MST, but it is not widely used rather than Prim and Kruskal algorithms. Borůvka algorithm selects the Minimum Weight Edge (MWE) from each vertex with distinct weights in $1^{st}$ stage, and selects the MWE from each MSF (Minimum Spanning Forest) in $2^{nd}$ stage. But the cycle check and the number of MSF in $1^{st}$ stage and $2^{nd}$ stage are difficult to implication by computer program even if it is easy to verify visually. This paper suggests the generalized Borůvka Algorithm, This algorithm selects all of the same MWEs for each vertex, then checks the cycle and constructs MSF for ascending sorted MWEs. Kruskal method bring into this process. if the number of MSF greats then 1, this algorithm selects MWE from ascending sorted inter-MSF edges. The generalized Borůvka algorithm is verified its application by being applied to the 7 graphs with the many minimum weights or distinct weight edges for any vertex. As a result, the generalized Borůvka algorithm is less required for cycle verification then the Kruskal algorithm. Therefore, the generalized Borůvka algorithm is more fast to obtain MST then Kruskal algorithm.

A Study on Quality Evaluation Model of Mobile Device Management for BYOD (BYOD 환경의 MDM 보안솔루션의 품질평가모델에 관한 연구)

  • Rha, HyeonDae;Kang, SuKyoung;Kim, ChangJae;Lee, NamYong
    • The Journal of Korean Association of Computer Education
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    • v.17 no.6
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    • pp.93-102
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    • 2014
  • A mobile office environment using mobile devices, such as tablet PC, mobile phone is gradually increased in enterprises, banking and public institutions etc which is no limitation on places. It occurs advanced and persist security threats that are required effective security management policy and technical solution to be secure. For BYOD (Bring Your Own Device) environment, technical security management solutions of network control based, MDM (Mobile Device Management), MAM (Mobile Application Management), MCM (Mobile Contents Management) were released, evolved and mixed used. In perspective of integrated security management solution, mobile security product should be selected to consider user experience and environment and correct quality evaluation model of product is needed which is provided standards and guidance on the selection criteria when it was introduced. In this paper, the most widely used MDM solution is selected to take a look at its features and it was reviewed the product attributes with related international standard ISO/IEC25010 software quality attributes. And then it was derived evaluation elements and calculated the related metrics based on the quality analysis model. For the verification of quality evaluation model, security checks list and testing procedures were established; it applied metrics and analyzed the testing result through scenario based case study.

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Efficient DRAM Buffer Access Scheduling Techniques for SSD Storage System (SSD 스토리지 시스템을 위한 효율적인 DRAM 버퍼 액세스 스케줄링 기법)

  • Park, Jun-Su;Hwang, Yong-Joong;Han, Tae-Hee
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.48 no.7
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    • pp.48-56
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    • 2011
  • Recently, new storage device SSD(Solid State Disk) based on NAND flash memory is gradually replacing HDD(Hard Disk Drive) in mobile device and thus a variety of research efforts are going on to find the cost-effective ways of performance improvement. By increasing the NAND flash channels in order to enhance the bandwidth through parallel processing, DRAM buffer which acts as a buffer cache between host(PC) and NAND flash has become the bottleneck point. To resolve this problem, this paper proposes an efficient low-cost scheme to increase SSD performance by improving DRAM buffer bandwidth through scheduling techniques which utilize DRAM multi-banks. When both host and NAND flash multi-channels request access to DRAM buffer concurrently, the proposed technique checks their destination and then schedules appropriately considering properties of DRAMs. It can reduce overheads of bank active time and row latency significantly and thus optimizes DRAM buffer bandwidth utilization. The result reveals that the proposed technique improves the SSD performance by 47.4% in read and 47.7% in write operation respectively compared to conventional methods with negligible changes and increases in the hardware.

An Analysis of the Effects of Political and Economic Forces on the Export of Renewable Energy Technologies (재생에너지 기술의 수출에 대한 정치·경제요인의 영향 분석)

  • Sung, Bong-Suk;Nian, Liu
    • Management & Information Systems Review
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    • v.37 no.2
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    • pp.209-233
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    • 2018
  • This study investigates the question of how political and economic factors may affect the export of renewable energy technologies. The relationships are tested using panel data for 19 OECD member countries over the period 1992-2012. Before establishing the empirical model, the current study checks the characteristics of the panel data, which includes various panel framework analyses, such as tests for the presence of normality, structural breaks, first-order autocorrelation, heteroscedasticity, cross-sectional dependence, panel unit-root. From the panel framework analyses, a dynamic panel model is established to test the relationship between the variables examined in this study. In order to reduce the bias of the estimation of the dynamic panel model and obtain efficient parameters, this study uses the bias-corrected least square dummy variable(LSDVC) estimator to estimate the empirical model. The results of this study show that governmental policies expressed as coercive pressure and market size positively affect the export growth of renewable energy technologies. However, public pressure and traditional energy industry have no significant effects on export performance. Policy implications are presented based on the results of this study.

Structure & Installation Engineering for Offshore Jack-up Rigs

  • Park, Joo-Shin;Ha, Yeong-Su;Jang, Ki-Bok;Radha, Radha
    • Bulletin of the Society of Naval Architects of Korea
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    • v.54 no.4
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    • pp.39-46
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    • 2017
  • Jack-up drilling rigs are widely used in offshore oil and gas exploration industry. It is originally designed for use in the shallow waters less than 60m of water depth; there is growing demand for their use in deeper water depth over 150m and harsher environmental conditions. In this study, global in-place analysis of jack-up rig leg for North-sea oil well is performed through numerical analysis. Firstly, environmental conditions and seabed characteristics at the North-sea are collected and investigated measurements from survey report. Based on these data, design specifications are established and the overall basic design is performed. Dynamic characteristics of the jack-up rig for North-sea are considered in the global in-place analysis both leg and hull and the basic stability against overturning moment is also analyzed. The structural integrity of the jack-up rig leg/hull is verified through the code checks and the adequate safety margin is observed. The uncertainty in jack-up behaviour is greatly influenced by the uncertainties in the soil characteristics that determine the resistance of the foundation to the forces imposed by the jack-up structure. Among the risks above mentioned, the punch-through during pre-loading is the most frequently encountered foundation problem for jack-up rigs. The objective of this paper is to clarify the detailed structure and installation engineering matters for prove the structural safety of jack-up rigs during operation. With this intention the following items are addressed; - Characteristics of structural behavior considering soil effect against environmental loads - Modes of failure and related pre-loading procedure and parameters - Typical results of structural engineering and verification by actual measurement.

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