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만성질환 관리를 위한 PDA폰 기반 이동형 방문건강관리 시스템 개발
손성용,황원숙,이양희,김창섭,임채승,박길홍 한국가정간호학회 2007 가정간호학회지 Vol.14 No.1
Purpose: The rapid change to an aging society generates an increase in the incidence of chronic diseases. Many chronic patients have been facing their illnesses without enough preparation. In order to solve these problems, we designed and tested a public healthcare service based on ubiquitous technology. Method: Telemedicine has emerged as new medical care system of chronic disease. However, public potential of its technology is difficult to know under current traditional health care system. In this work, we developed a Personal Digital Access (PDA) phone based healthcare system by trained visiting nurses for elderly patients. A field test was performed by SeongBuk Public Health Center in Seoul, Republic of Korea (ROK). Result: Surveys were generated to assess the effects of this system compared to conventional public health system. Findings of trials demonstrate that healthcare coordination enhanced by PDA phone technology is satisfactory to the patients and nurses compared to previous one because prompt responses arouse their recognition of health. Conclusion: Ubiquitous healthcare system applied to public health service proved to be efficient and time-saving to monitor and control the chronic illnesses of large population.
손성용,서정일,한민수,Son Sung Young,Seo Joung Il,Hahn Minsoo 대한음성학회 2003 말소리 Vol.47 No.-
It is difficult to implement sound field effect on real time using linear convolution in time domain because linear convolution needs much multiply operations. In this paper three ways is introduced to reduce multiplication operations. Firstly, linear convolution in time domain is replaced with circular convolution in frequency domain. It means that it operates multiplication in place of convolution. Secondly, one frame will be divided into several frames. It will reduce the multiplication operation in processing that transforms time domain into frequency domain. Finally, QFT will be used in place of FFT. Three ways result much reduction in multiplication operations. The reduction of the multiplication operation makes the real time implementation possible.
Block Filtering과 QFT를 이용한 실시간 음장 효과구현
손성용,서정일,한민수,Sohn Sung-Yong,Seo Jeongil,Hahn Minsoo 대한음성학회 2004 말소리 Vol.51 No.-
It is almost impossible to generate the sound field effect in real time with the time-domain linear convolution because of its large multiplication operation requirement. To solve this, three methods are introduced to reduce the number of multiplication operations in this paper. Firstly, the time-domain linear convolution is replaced with the frequency-domain circular convolution. In other words, the linear convolution result can be derived from that of the circular convolution. This technique reduces the number of multiplication operations remarkably, Secondly, a subframe concept is introduced, i.e., one original frame is divided into several subframes. Then the FFT is executed for each subframe and, as a result, the number of multiplication operations can be reduced. Finally, the QFT is used in stead of the FFT. By combining all the above three methods into our final the SFE generation algorithm, the number of computations are reduced sufficiently and the real-time SFE generation becomes possible with a general PC.
포먼트 이동과 스펙트럼 기울기의 변환을 이용한 음색 변환
손성용,한민수,Son Song-Young,Hahn Min-Soo 대한음성학회 2003 말소리 Vol.45 No.-
The purpose of voice color conversion is to change the speaker identity perceived from the speech signal. In this paper, we propose a new voice color conversion algorithm through the formant shifting and the spectrum-tilt modification in the frequency domain. The basic idea of this technique is to convert the positions of source formants into those of target speaker's formants through interpolation and decimation and to modify the spectrum-tilt by utilizing the information of both speakers' spectrum envelops. The LPC spectrum is adopted to evaluate the position of formant and the information of spectrum-tilt. Our algorithm enables us to convert the speaker identity rather successfully while maintaining good speech quality, since it modifies speech waveforms directly in the frequency domain.
손성용,김재형,박성원 대한전기학회 2022 전기학회논문지 P Vol.71 No.4
Demand for ESS is increasing as time goes on due to its various uses. Although the ESS cost is decreasing, there are problems of high initial cost and the need for installation space for general customers. The concept of a shared ESS, where multiple customers use a single ESS, is emerging. This study proposes the ESS capacity sharing model among prosumers with real ESS and customers without ESS. The proposed shared model showed that the prosumers' ESS could be used as a shared ESS without installing a new ESS while increasing the profit of the prosumer and customers through case studies.