• International Journal of Internet, Broadcasting and Communication
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• v.10 no.3
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• pp.88-97
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• 2018

Chronic diseases management can be effectively achieved through early detection, continuous treatment, observation, and self-management, rather than a radar approach where patients are treated only when they visit a medical facility. However, previous studies have not been able to provide integrated chronic disease management services by considering generalized services such as hypertension and diabetes management, and difficult to expand and link to other services using only specific sensors or services. This paper proposes clinical rule flow model based on medical data analysis to provide personalized care for chronic disease management. Also, we implemented that as Rule-based Smart Healthcare System (RSHS). The proposed system executes chronic diseases management rules, manages events and delivers individualized knowledge information by user's request. The proposed system can be expanded into a variety of applications such as diet and exercise service in the future.

• Bulletin of the Korean Chemical Society
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• v.24 no.5
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• pp.555-558
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• 2003

An enrichment/separation system for atomic absorption spectrometric determinations of Cu(Ⅱ), Fe(Ⅲ), Ni(Ⅱ) and Co(Ⅱ) has been established. The procedure is based on the adsorption of the analytes as calmagite chelates on Chromosorb-102. The effects of some parameters including pH, amount of ligand, salt matrix, flow rates of sample and eluent solutions were investigated. Under optimized conditions, the relative standard deviation of the combined method of sample treatment, preconcentration and determination with FAAS (N=5) is generally lower than 5%. The limit of detection (3σ) was between 6.0-112.9 ㎍/L. The results were used for preconcentration of analytes from some sodium and ammonium salt.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04a
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• pp.769-771
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• 2001

침입의 궁극적 목표는 루트 권한의 획득이라고 할 수 있는데 최근 유행하고 있는 버퍼플로우(Buffer Over flow)등이 대표적이다. 최근 날로 다양화되는 이런 침입방법들에 대응하기 위해 비정상행위 탐지기법 연구가 활발한데 대표적인 방법으로는 통계적 기법과 전문가시스템, 신경망 등을 들 수 있다. 본 논문에서 제안하는 침입탐지시스템은 권한 이동 관련 이벤트의 추출 기법을 이용하여 Solaris BSM 감사 기록에서 추출된 정보 이벤트들을 수집한 후 은닉 마르코프 모델(HMM)로 모델링하여 정상행위 모델들을 만든다. 추론 및 판정시에는 이미 만들어진 정상행위 모델을 사용하여 새로 입력된 사용자들의 시퀀스를 비교 평가하고, 이를 바탕으로 정상 권한이동과 침입시의 권한이동의 차이를 비교하여 침입여부를 판정한다. 실험결과 HMM만을 사용한 기존 시스템에 비해 유용함을 알 수 있었다.

• Journal of Embryo Transfer
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• v.30 no.1
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• pp.1-6
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• 2015

The cold shock of spermatozoa is associated with oxidative stress induced by reactive oxygen species. This study was conducted to evaluate the toxicity of natural antioxidant green tea extract (GTE) in lactose-egg yolk (LEY) extender during boar sperm cooling prior to freezing. Spermatozoa were cooled to $5^{\circ}C$ for 3 h in LEY extender containing 0 (control), 1, 10, 100 or 1,000 mg/l of GTE, re-suspended with LEY-glycerol-Equex extender and cooled at $5^{\circ}C$ for 30 min. Sperm progressive motility, viability and phosphatidylserine (PS) translocation were evaluated. PS translocation was assayed by flow cytometry using Annexin V-FITC apoptosis detection kit. The sperm function including progressive motility, viability and PS translocation was not significantly different regardless of GTE concentrations (P>0.05). In conclusion, this study demonstrated non-toxicity of GTE supplement in LEY extender during sperm cooling.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 1999.05a
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• pp.145-150
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• 1999

As proven petroleum reserves decline through continued production. exploration for new oil and gas resources will extend into environments which present significant economic risks arid technical hurdles. Since safety is one of the biggest concerns in drilling operations. the oil industry routinely trains its personnel in areas which are critical for safe and economical drilling procedures. One of these major areas is well control. A kick is defined as an unscheduled flow of formation fluids into a wellhole. A kick occurs whenever the resultant wellbore pressure is less than the formation pressure in an exposed zone capable of producing kick fluids. The typical causes of reduced wellbore pressure are insufficient mud weight. inadequate fluid level in the hole, and swabbing.(omitted)

• Transactions of the Korean Society of Automotive Engineers
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• v.21 no.2
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• pp.114-121
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• 2013

High efficiency operation is required for motors of vehicle to increase fuel efficiency due to the regulation of exhaust gas. This paper presents a control method of fuel pressure to increase fuel efficiency and a sensorless control method of BLDC motor to get higher efficiency than conventional brushed DC motor. Initial rotor position of BLDC motor is detected from current value that is occurred by test voltage pulse and rotor is accelerated by defined sequence to enter sensorless operation mode. The algorithm to control flow rate of fuel pump uses PI controller that is control motor speed to maintain the target fuel pressure commanded by ECU.

• Analytical Science and Technology
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• v.17 no.6
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• pp.532-535
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• 2004

A method on the determination of Co(II) after adsorbing of Co(II) on 2-mercaptobenzothiazole-loaded silica gel was studied. The conditions on the separation of Co(II) such as pH of solution, the amount of 2-mercaptobenzothiazole, the flow rate for adsorption, and the desorption solvent were optimized to 9.0, 0.05 g, $10mL\;min^{-1}$ and 1 M $HNO_3$ in ethanol, respectively. Under these optimum conditions, the calibration curve of Co(II) was obtained over concentration range of $2{\sim}120ng\;mL^{-1}$. The detection limit was $0.6ng\;mL^{-1}$. Recovery yields of Co(II) in various natural water samples were more than 90%.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.269-272
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• 2004

The respiration measurement method using the ultrasound sensor hardly gets an influence of an error of inertia and pressure and it is a respiratory detection device available semi-permanently. This device measures the amount and flow of respiration through using a delivery speed difference of the ultrasound waves that are a return format by the pneumatic stream that is a flogging of ultrasound waves during transmission and receipt as having used a characteristic of ultrasound waves. In this paper, it improved sensitivity of a signal to happen during transmission and receipt of a sensor because measurement must be performed with a patient to the center and measurement was played in a weak breathing so that it was possible.

• The Korean Journal of Nuclear Medicine
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• v.37 no.1
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• pp.63-72
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• 2003

Functional MRI (fMRI) provides an indirect mapping of cerebral activity, based on the detection of the local blood flow and oxygenation changes following neuronal activity (Blood Oxygenation Level Dependent). fMRI allows us to study noninvasively the normal and pathological aspects of functional cortical organization. Each fMRI study compares two different states of activity. Echo-Planar Imaging is the technique that makes it possible to study the whole brain at a rapid pace. Activation maps are calculated from a statistical analysis of the local signal changes. fMRI is now becoming an essential tool in the neurofunctional evaluation of normal volunteers and many neurological patients as well as the reference method to image normal or pathologic functional brain organization.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.9 no.10
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• pp.4092-4107
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• 2015

We propose a background subtraction method for moving cameras based on trajectory classification, image segmentation and label inference. In the trajectory classification process, PCA-based outlier detection strategy is used to remove the outliers in the foreground trajectories. Combining optical flow trajectory with watershed algorithm, we propose a trajectory-controlled watershed segmentation algorithm which effectively improves the edge-preserving performance and prevents the over-smooth problem. Finally, label inference based on Markov Random field is conducted for labeling the unlabeled pixels. Experimental results on the motionseg database demonstrate the promising performance of the proposed approach compared with other competing methods.