http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Cardiac Rehabilitation Program using Smartphone
Heewon Chung(정희원),Hoon Ko(고훈),Jinseok Lee(이진석) 대한전기학회 2016 대한전기학회 학술대회 논문집 Vol.2016 No.2
It is not easy for cardiac rehabilitation patients to exercise themselves at home after hospital discharge. In this paper, we show that using a smartphone automatically guides the exercise for cardiac rehabilitation patients. We introduced the cardiac rehabilitation application on a smartphone, and investigated the feasibility by evaluating the heart rate estimation performance during exercise.
냉장 정육가공 작업장에서 결로 방지를 위한 하이브리드 제습기 설계사례
박진석(Jinseok Park),박승태(Seungtae Park),이현주(Hyunju Lee),정광섭(Kwangseop Chung),이태호(Taeho Lee),조남열(Namyul Cho) 대한설비공학회 2011 대한설비공학회 학술발표대회논문집 Vol.2011 No.7
Hybrid dehumidifier can save energy 40% more in comparison with the existing one through the cooling dehumidification in an evaporator and the desiccant dehumidification in a condenser by one compressor. According to comparing the specification of the hybrid dehumidifier with the existing one for dehumidifying the meat processing workplace that has lots of moisture by the frozen meat, the hybrid dehumidifier can be proven as the low-cost and high-efficiency equipment. And also, when designing the dehumidification system of the meat processing workplace in the future, the hybrid dehumidifier can be applied.
운전인자 조절에 따른 박막강하형 농축기 처리수 효율 비교
박진석(Jinseok Park),정진도(Jindo Chung) 한국환경에너지공학회 2023 한국열환경공학회 학술대회지 Vol.2023 No.2
In a thin film falling concentrator, the product evaporates as it descends by creating a constant thin film from the top to the bottom inside the heating tube through the distributor, and the heated vapor condenses on the outside of the heating tube. An appropriate distributor must be applied according to the physical properties of the product. There are three types of distributors: perforated plate type, nozzle type, and tube type. Among these, the perforated plate type is widely adopted. Broadly speaking, the structure of the concentrator consists of a heating tube that performs heat exchange and a separator that separates the evaporated gas. Thin-film fall concentrators are the most widely used equipment at present because the product thickness is thin, so thermal efficiency is high, and the residence time is short, so there is no thermal denaturation of the product. Based on the T-N data of the analyzed facility treated water, we compared the wastewater properties according to the manipulation of several operating factors and how to supplement the facility. We will focus on comparing changes in the T-N removal efficiency of treated water and facility supplementation methods due to changes in the process, and conduct comparative studies on the sulfuric acid input amount and operation method that are expected to have an impact.
Lee, Hooseok,Chung, Heewon,Kim, Jong-Woong,Lee, Jinseok IEEE 2019 IEEE Sensors Journal Vol. No.
<P>Accurate heart rate estimation from reflectance photoplethysmography (PPG) during intense physical activity is difficult given unpredictable motion artifacts (MAs). Recent research has focused on the removal of MAs in PPG signals by considering acceleration signals as noise references. However, this approach does not always effectively remove MAs, as they can be associated with other noise sources. For instance, finger or hand motion reflects upon the wrist, corrupting the PPG signals, but an accelerometer cannot capture this type of MA. Hence, we propose adding a piezoelectric transducer on the wrist to identify noise originated from finger and hand motion. We first detail the developed wearable device that simultaneously measures PPG, acceleration, and piezoelectric pressure signals from the wrist. Then, the effectiveness of piezoelectric pressure signals for MA removal is verified from PPG signals collected under finger tapping and hand folding/unfolding, and from data of 17 healthy subjects undergoing physical activity. MA removal using both acceleration and piezoelectric pressure signals exhibits a mean absolute error of 1.58 beats per minute (bpm), considerably below the error of 3.75 bpm obtained using only acceleration signals. Therefore, measuring piezoelectric pressure signals on the wrist can improve heart rate estimation by providing more information of MAs corrupting PPG signals.</P>
Lee, Kyuhang,Ko, Jinseok,Jo, Jae Heung,Chung, Jinil Elsevier 2017 Fusion engineering and design Vol.121 No.-
<P><B>Abstract</B></P> <P>An optical system capable of preserving, or minimizing the change of, the polarization properties of incident light has been designed and fabricated for the motional Stark effect diagnostic system which measures internal magnetic field structures inside the tokamak for the Korea Superconducting Tokamak Advanced Research. A dual photoelastic modulator (PEM) with a linear polarizer is included in the optical train with four lenses, a mirror and a dichroic beam splitter. Particular cares have been taken for the polarization properties of the delivered light to be perturbed as little as possible under a strong magnetic field and high vacuum. The lenses are made of STIH-6, a material with low Verdet constant, which minimizes the Faraday rotation. The residual Faraday rotation that takes place in the non-STIH-6 optical elements such as the vacuum window and the optical apertures of the PEM is calibrated out from the in-situ measurements using an in-vessel reference polarizer while energizing the magnetic field coils. In the lens design, the object plane is rotated by 44.8° from the optical axis because of the tilted setup-port. The image surface has a finite curvature to reduce the aberration from the four lenses. The fiber dissector is designed based on the focal plane that aligns the focal points from 25 lines-of-sight, each of which constitutes a bundle of 19 fibers. The fibers run about 35m from the front optics in the tokamak vacuum vessel to the detector in the diagnostic area remote from the tokamak hall. The footprint images at the intersections of the lines-of-sight on the neutral beam trajectory confirms the imaging quality is sufficient to the diagnostic requirement with the designed magnifications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Description on how the polarization control is accomplished in the complex optics for the KSTAR MSE system. </LI> <LI> Various quantitative analyses for the optical performance in accommodating multiple and tilted observation chords. </LI> <LI> Integration of the fabricated components including the fiber bundles and the dissector module for them. In-vessel testing for the image formation with the integrated optics system. </LI> </UL> </P>
Microporous cell-laden hydrogels for engineered tissue constructs
Park, Jae Hong,Chung, Bong Geun,Lee, Won Gu,Kim, Jinseok,Brigham, Mark D.,Shim, Jaesool,Lee, Seunghwan,Hwang, Chang Mo,Durmus, Naside Gozde,Demirci, Utkan,Khademhosseini, Ali Wiley Subscription Services, Inc., A Wiley Company 2010 Biotechnology and bioengineering Vol.106 No.1
<P>In this article, we describe an approach to generate microporous cell-laden hydrogels for fabricating biomimetic tissue engineered constructs. Micropores at different length scales were fabricated in cell-laden hydrogels by micromolding fluidic channels and leaching sucrose crystals. Microengineered channels were created within cell-laden hydrogel precursors containing agarose solution mixed with sucrose crystals. The rapid cooling of the agarose solution was used to gel the solution and form micropores in place of the sucrose crystals. The sucrose leaching process generated homogeneously distributed micropores within the gels, while enabling the direct immobilization of cells within the gels. We also characterized the physical, mechanical, and biological properties (i.e., microporosity, diffusivity, and cell viability) of cell-laden agarose gels as a function of engineered porosity. The microporosity was controlled from 0% to 40% and the diffusivity of molecules in the porous agarose gels increased as compared to controls. Furthermore, the viability of human hepatic carcinoma cells that were cultured in microporous agarose gels corresponded to the diffusion profile generated away from the microchannels. Based on their enhanced diffusive properties, microporous cell-laden hydrogels containing a microengineered fluidic channel can be a useful tool for generating tissue structures for regenerative medicine and drug discovery applications. Biotechnol. Bioeng. 2010; 106: 138–148. © 2010 Wiley Periodicals, Inc.</P>