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Security Enhancement Trends in Web Service
이성훈 한국정보기술학회 2014 JOURNAL OF ADVANCED INFORMATION TECHNOLOGY AND CON Vol.4 No.1
As the Internet has been growing, WWW(World Wide Web) based services were popularized and users using the service were increased excessively. To support these environments, it has been emphasized quality and security of web services. There, in this paper, we described standard trends such as SOAP, WSDL, UDDI for web services. And we analyzed the security policies to protect user's information. Eventually, We described a mechanism to use bio information for protection of user's information.
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IT Conversions Related with Real Life
이성훈 한국정보기술학회 2014 JOURNAL OF ADVANCED INFORMATION TECHNOLOGY AND CON Vol.4 No.2
Digital convergence means a combination of existing industries with IT technology to create new values and is promoting various changes in company values and even industrial structure. In this paper, we review smart convergence related with our lives such as cars, healthcare and city(building).
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5.8GHz 마이크로파 무선전력전송 시스템 개발 및 전송효율측정
이성훈,손명식 한국반도체디스플레이기술학회 2014 반도체디스플레이기술학회지 Vol.13 No.4
Previous studies have selected wireless power transmission system using 2.45GHz of ISM band, but the researches for 5.8GHz microwave wireless power transmission has been relatively rare. The 5.8GHz has some advantages compared with 2.45GHz. Those are smaller antenna and smaller integrated system for RFIC. In this paper, the 5.8GHz wireless power transmission system was developed and transmission efficiency was measured according to the distance. A transmitter sent the amplified microwaves through an antenna amplified by a power amplifier of 1W for 5.8GHz, and a receiver was converted to DC from RF through a RF-DC Converter. In the 1W 5.8GHz wireless power transmission system, the converted currents and voltages were measured to evaluate transmission efficiency at each distance where LED lights up to 1m. The RF-DC Converter is designed and fabricated by impedance matching using full-wave rectifier circuit. The transmission-efficiency of the system shows from 1.05% at 0cm to 0.095% at 100cm by distance.
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생산효율 및 안정성이 개선된 도네페질 염산염 함유 제형의 개발
이성훈 청주대학교 2017 産業科學硏究 Vol.34 No.2
The aim of the present research was to develop direct compression donepezil hydrochloride 10mg-loaded tablet providing enhanced content uniformity. Various composition and preblending methods were tested at lab-scale, and the optimum composition and method were applied to pilot-scale(3,000T) production for further confirmation of the entire process. The content uniformity, physical properties and dissolution profile of final film-coated tablet were compared to the commercial product. In pilot-scale preparation, the method involving preblending, micronized API, addition of a colloidal silicone dioxide and sieving through smaller pores yielded an excellent acceptance value in the content uniformity criteria compared to a control method and composition. Furthermore, pilot-scale product exhibited similar dissolution profiles in various media. Thus, direct compression donepezil 10mg tablet developed in this study would be a promising dosage form with excellent content uniformity that may be bioequivalent to the commercial product.
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수정된 generalized Landweber 방법을 이용한 ECT 영상 복원
이성훈,김경연,최봉열,장재덕,김용성 대한전자공학회 2006 電子工學會論文誌-SC (System and control) Vol.43 No.5
ECT는 측정된 커패시턴스 값을 이용하여 유전 물체의 유전율 분포를 가시화하기 위해 사용되는 비접촉 영상 복원 기술이다. 영상 복원시 수렴 속도 개선과 영상의 질 향상을 위해 다양한 반복적 영상 복원 방법들이 있으며, Landweber 방법은 널리 사용되고 있는 ECT의 영상 복원 방법 중 하나이다. 본 논문에서는 ECT 영상 복원에서 수렴 속도를 개선하기 위해 수정된 generalized Landweber 방법을 제안한다. 특히, Shaping 행렬을 가지는 generalized Landweber 방법에 가속항을 추가하고 최적화 계수를 해석적으로 결정한다. 다양한 컴퓨터 모의 실험을 통해 제안한 방법의 타당성을 입증한다. Electrical capacitance tomography (ECT) is a non-invasive imaging reconstruction technique that aims at visualization of cross sectional permittivity distribution of dielectric object based on the measured capacitance. There are lots of iterative image reconstruction methods to accelerate convergence rate and enhance quality of reconstructed image, Among them, iterative Landweber method is one of the widely used reconstruction algorithm in ECT. In this paper, modified generalized Landweber method is proposed to accelerate convergence rate. In doing so, acceleration term is considered to the generalized Landweber method with shaping matrix and an optimal step length is determined analytically. Extensive computer simulations are provided to illustrate the reconstruction performance of the proposed algorithm.
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Smart Industries based on Smart Technologies in Convergence
이성훈 한국정보기술학회 2013 JOURNAL OF ADVANCED INFORMATION TECHNOLOGY AND CON Vol.3 No.1
This digital convergence combines existing industry with IT to create new values and is promoting various changes in company values and even industrial structure. We use products included a word "smart" such as smart phone, smart TV, smart grid, smart key. These products were made by "smart technology". In this paper, we described a prospect on smart technologies and smart industries
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