Search Results - "Park, Chulkyu"

A Metal Artifact Reduction Method Using a Fully Convolutional Network in the Sinogram and Image Domains for Dental Computed Tomography by Lee, Dongyeon, Park, Chulkyu, Lim, Younghwan, Cho, Hyosung

“…The reconstruction quality of dental computed tomography (DCT) is vulnerable to metal implants because the presence of dense metallic objects causes beam…”
Get full text

Helical artifact reduction method using image segmentation with CNN denoising technique by Choi, Seungwon, Kim, Byeongjoon, Park, Chulkyu, Park, Jueon, Kim, Yousuk, Choi, Sungil, Baek, Jongduk

“…Helical computed tomography (CT) scans are often performed to obtain three-dimensional images of an object that is longer than the detector. However, the…”
Get full text

A voltage-mode DC-DC converter with enhanced transient responses by Kichang Jang, Jungsoo Choi, Chulkyu Park, Joongho Choi

“…This paper presents the design technique using a charge-pump circuit for enhancing the transient responses of a voltage-mode DC-DC converter. Although there is…”
Get full text

Educational Practices in Sommerfeld School by Park Chulkyu, Hong Hun-Gi

“…This study sought to discover what aspects of the nature of science (NOS) should be emphasized to nurture great scientists. To this end, educational practices…”
Get full text

High school students' evolving alternative conception related to the volume of gas: A Lakatosian perspective by Park, Chulkyu, Mun, Seonyeong, Hong, Hun‐Gi

“…The purpose of this case study, informed by a Lakatosian perspective, is to identify how an alternative conception that originates in present learning but is…”
Get full text

Educational Practices in Sommerfeld School: A Case of Scientist Education from the View of Nature of Science by Park, Chulkyu, Hong, Hun-Gi

“…This study sought to discover what aspects of the nature of science (NOS) should be emphasized to nurture great scientists. To this end, educational practices…”
Get full text

Undergraduate Students’ Understanding of Surface Tension Considering Molecular Area by Park, Chulkyu, Lee, Chang Youn, Hong, Hun-Gi

“…According to the definition, surface tension could be affected not only by intermolecular interaction but also by molecular area. However, in chemistry…”
Get full text

A DC-DC converter with adaptive clock control by Subin Kim, Kichang Jang, Chulkyu Park, Joongho Choi

“…In this paper, the DC-DC converter for adaptive clock control is presented. The proposed adaptive clock control scheme generates a leading edge blanking (LEB)…”
Get full text

A switched-capacitor filter with a slew rate enhancement technique by Chulkyu Park, Kichang Jang, Joongho Choi

“…In this paper, a switched-capacitor filter with a slew rate enhancement circuit for wireless communication applications is designed. The type of the filter is…”
Get full text

Feasibility study for image reconstruction in circular digital tomosynthesis (CDTS) from limited-scan angle data based on compressed-sensing theory by Park, Yeonok, Je, Uikyu, Cho, Hyosung, Hong, Daeki, Park, Chulkyu, Cho, Heemoon, Choi, Sungil, Woo, Taeho

“…In this work, we performed a feasibility study for image reconstruction in a circular digital tomosynthesis (CDTS) from limited-scan angle data based on…”
Get full text

Hydrostatic pressure test of the ITER lower port stub extension for factory acceptance by Moon, Hokyu, Kim, Hyun-Soo, Kim, Yu-Gyeong, Park, Chulkyu, Kang, Seok Geun, Lee, Jihoen

“…•Method of pressure test for ITER vacuum vessel port is introduced.•Actual deformation is verified using 3D metrology method.•Numerical simulation and actual…”
Get full text

Validation of cyanide copper electrodeposited layer on test coupons for anti-seizing and outgassing in Tokamak vacuum vessel by Park, Chulkyu, Kim, Hyun-Soo, Chung, Woo-Ho, Kim, Jae-Hoon

“…A vacuum vessel which is the first confinement barrier of Tokamak fusion reactor should have numerous in-vessel components. Since those components are to be…”
Get full text

Evaluation of the image quality in digital breast tomosynthesis (DBT) employed with a compressed-sensing (CS)-based reconstruction algorithm by using the mammographic accreditation phantom by Park, Yeonok, Cho, Heemoon, Je, Uikyu, Cho, Hyosung, Park, Chulkyu, Lim, Hyunwoo, Kim, Kyuseok, Kim, Guna, Park, Soyoung, Woo, Taeho, Choi, Sungil

“…In this work, we have developed a prototype digital breast tomosynthesis (DBT) system which mainly consists of an x-ray generator (28kVp, 7mAs), a CMOS-type…”
Get full text

Design of analog front end for mobile fuel gauge applications by Chulkyu Park, Hyojae Kim, Jongkeun Hwang, Kichang Jang, Yeongik Yoo, Joongho Choi

“…A high-resolution second-order integrating sigma-delta analog-to-digital converter (ADC) using double-sampled integrators is presented whitch performs two…”
Get full text

Experimental setup and the system performance for single-grid-based phase-contrast x-ray imaging (PCXI) with a microfocus x-ray tube by Lim, Hyunwoo, Park, Yeonok, Cho, Hyosung, Je, Uikyu, Hong, Daeki, Park, Chulkyu, Woo, Taeho, Lee, Minsik, Kim, Jinsoo, Chung, Nagkun, Kim, Jinwon, Kim, Jinguk

“…In this work, we investigated a simplified approach to phase-contrast x-ray imaging (PCXI) by using a single antiscatter grid and a microfocus x-ray tube,…”
Get full text

Investigation of reconstruction quality in digital breast tomosynthesis (DBT) based on compressed-sensing algorithm and synthesized 2D breast image by Yeonok Park, Hyosung Cho, Daeki Hong, Uikyu Je, Chulkyu Park, Heemoon Cho, Hyunwoo Lim, Kyuseok Kim, Soyoung Park, Taeho Woo, Sungil Choi

“…Digital breast tomosynthesis (DBT) is most commonly used in three-dimensional (3D) mammography because it provides a 3D view, so suspected tumors and massed in…”
Get full text

Image reconstruction in region-of-interest (or interior) digital tomosynthesis (DTS) based on compressed-sensing (CS) by Park, Soyoung, Kim, Guna, Cho, Hyosung, Je, Uikyu, Park, Chulkyu, Kim, Kyuseok, Lim, Hyunwoo, Lee, Dongyeon, Lee, Hunwoo, Kang, Seokyoon, Park, Jeongeun, Woo, Taeho, Lee, Minsik

“…•A new type of digital tomosynthesis (DTS) examination was introduced.•DTS region-of-interest (ROI) reconstruction requires less radiation dose.•A CS-based…”
Get full text

Improvement of image performance in digital breast tomosynthesis (DBT) by incorporating a compressed-sensing (CS)-based deblurring scheme by Kim, Kyuseok, Park, Yeonok, Cho, Heemoon, Cho, Hyosung, Je, Uikyu, Park, Chulkyu, Lim, Hyunwoo, Park, Soyoung, Woo, Taeho, Choi, Sungil

“…In this work, we investigated a compressed-sensing (CS)-based deblurring scheme incorporated with the total-variation (TV) regularization penalty for image…”
Get full text

Interference fit process development for the ITER Vacuum Vessel Gravity Support mock-up fabrication by Cheon, Jason, Park, Chulkyu, Moon, Hokyu, Chung, Woo-Ho, Kim, Hyun-Soo, Hong, Kwen-Hee, Kim, Gwang-Ho, Kim, Yu-Gyeong

“…The ITER Vacuum Vessel (VV) is supported by the nine VV gravity supports (VVGS) located on the cryostat toroidal pedestal. The VVGS is dual hinge type that…”
Get full text

Experimental study on the 3D image reconstruction in a truncated Archimedean-like spiral geometry with a long-rectangular detector and its image characteristics by Hong, Daeki, Cho, Heemoon, Cho, Hyosung, Choi, Sungil, Je, Uikyu, Park, Yeonok, Park, Chulkyu, Lim, Hyunwoo, Park, Soyoung, Woo, Taeho

“…In this work, we performed a feasibility study on the three-dimensional (3D) image reconstruction in a truncated Archimedean-like spiral geometry with a…”
Get full text