국가공간정보사업 평가시기/내용/방법의 개선방안에 관한 연구

김태훈(TaeHoon?Kim),강진아(JinA Kang),최현상(HyunSang Choi) 한국측량학회 2011 한국측량학회 학술대회자료집 Vol.2011 No.4

Relationship between Body Dissatisfaction and Body Size of Males in Their Twenties

Taehoon Kim(Taehoon Kim) 충북대학교 생활과학연구소 2023 생활과학연구논총 Vol.27 No.1

Background/Objectives: This research aims to identify any relationships between body dissatisfaction and body size among males in their twenties. Methods: Participants were recruited for a year from August 2015 to July 2016. Participants were 100 males, of which 50 were white American males and 50 were Korean males in North Carolina, United States of America, who are aged between 20 and 29 years old. TC2-19 3D body scanner was used to measure the participant’s body size. A descriptive analysis of data for demographics and body satisfaction was conducted. The data were analyzed by correlation techniques and regression analyses with SPSS 24 for Windows. Results: The results of this research indicate that the participants who have lower BMI, WHR, WCR, or WSR tend to perceive higher evaluations of their appearance, pay more attention to their appearance and are more satisfied with their body areas. Participants who have higher BMI or WHR tend to be more anxious about being overweight. Participants who have lower weight, lower shoulder-to-shoulder and lower girth values tend to show higher AE, AO, and BAS. Participants who have a higher shoulder-to-shoulder, higher upper arm girth, higher chest girth and higher waist tend to have more preoccupation about being overweight. Conclusion/Implications: The results of this research can help fashion businesses consider targeting males’ body dissatisfaction in the design of their products by understanding the relationship between body dissatisfaction and body size of targeting males.

Intracranial Metaplastic Meningioma : Clinical and Radiological Characteristics of 11 Cases

Taehoon Kim,Jin Wook Kim,So Young Ji,Ho Kang,Kyung-Min Kim,Yong Hwy Kim,Chul-Kee Park,Seung Hong Choi,Sung-Hye Park 대한신경외과학회 2020 Journal of Korean neurosurgical society Vol.63 No.5

Objective : Metaplastic meningioma is an extremely rare subtype of World Health Organization (WHO) grade I meningioma. It has distinctive histological subtypes according to its own mesenchymal components. Owing to its scarcity, clinical or radiological features of a metaplastic meningioma are poorly described. Methods : Between 2004 and 2018, we analyzed total 1814 cases surgically proven meningioma for 15 years. Among them, metaplastic meningioma was diagnosed in 11 cases. Magnetic resonance images were taken for all patients, and computed tomography scan was taken for 10 patients. Results : WHO grade I meningiomas were 1376 cases (75.9%), 354 cases (19.5%) in WHO grade II, and 84 cases (4.6%) in WHO grade III meningiomas. Metaplastic meningioma was 11 cases as 0.8% of WHO grade I meningioma and 0.6% of entire meningiomas for 15 years. Among the entire 11 metaplastic meningiomas, five tumors (45%) were diagnosed as a lipomatous subtype with rich fat components, four (36%) as an osseous subtype with extensive bone formation and two (18%) as a xanthomatous subtype. There was no cartilaginous subtype metaplastic meningioma in our study. Lipomatous and osseous metaplastic meningioma have peculiar radiological characteristics according to mesenchymal components. Conclusion : We investigated a rare metaplastic meningioma subtype based on our 15-year surgical experience with meningiomas. Further investigation will be necessary for the clear clarification of tumor nature of this rare tumor.

Bandgap engineered monodisperse and stable mercury telluride quantum dots and their application for near-infrared photodetection

Kim, Sungwoo,Kim, Taehoon,Im, Sang Hyuk,Seok, Sang Il,Kim, Kang Wook,Kim, Sungjee,Kim, Sang-Wook Royal Society of Chemistry 2011 Journal of materials chemistry Vol.21 No.39

<P>Bandgap-engineered monodisperse HgTe NCs of different sizes were synthesized by means of a facile temperature-control method, a non-aqueous and non-Te-gas process. The photo-physical properties of the synthesized NCs in a simple photovoltaic device were tested. It was shown that this cell is capable of processing signals up to the 100 kHz level below 3 dB and hence is suitable for use in NIR photodetection.</P> <P>Graphic Abstract</P><P>Bandgap-engineered monodisperse HgTe NCs were synthesized by temperature-control method, a non-aqueous and non-Te-gas process. The NCs were tested in a simple photovoltaic device, which showed that this cell is capable of processing signals up to the 100 kHz level below 3 dB. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1jm12436f'> </P>

MATLAB/Simulink Pulse-Echo Ultrasound System Simulator Based on Experimentally Validated Models

Taehoon Kim,Sangmin Shin,Hyongmin Lee,Hyunsook Lee,Heewon Kim,Eunhee Shin,Suhwan Kim IEEE 2016 and Frequency Control Vol.63 No.2

<P>A flexible clinical ultrasound system must operate with different transducers, which have characteristic impulse responses and widely varying impedances. The impulse response determines the shape of the high-voltage pulse that is transmitted and the specifications of the front-end electronics that receive the echo; the impedance determines the specification of the matching network through which the transducer is connected. System-level optimization of these subsystems requires accurate modeling of pulse-echo (two-way) response, which in turn demands a unified simulation of the ultrasonics and electronics. In this paper, this is realized by combining MATLAB/Simulink models of the high-voltage transmitter, the transmission interface, the acoustic subsystem which includes wave propagation and reflection, the receiving interface, and the front-end receiver. To demonstrate the effectiveness of our simulator, the models are experimentally validated by comparing the simulation results with the measured data from a commercial ultrasound system. This simulator could be used to quickly provide system-level feedback for an optimized tuning of electronic design parameters.</P>

Patterns in renal diseases diagnosed by kidney biopsy: A single-center experience

( Taehoon Yim ),( Sang-un Kim ),( Sangmi Park ),( Jeong-hoon Lim ),( Hee-yeon Jung ),( Jang-hee Cho ),( Chan-duck Kim ),( Yong-lim Kim ),( Man-hoon Han ),( Yong-jin Kim ),( Ji-young Choi ),( Sun-hee P 대한신장학회 2020 Kidney Research and Clinical Practice Vol.39 No.1

Background: The worldwide incidence of renal disease diagnosed by a kidney biopsy varies with age, race, sex, and region. Owing to a lack of studies and limited research resources for this disease in Korea, we investigated renal disease patterns by analyzing data from kidney biopsies performed over 13 years in a university-based teaching hospital in Korea. Methods: Among 2,053 kidney biopsies performed from 2001 to 2013 at Kyungpook National University Hospital, 1,924 were retrospectively analyzed for histopathologic, demographic, and clinical data as well as laboratory results. Results: Among the 1,924 studied kidney biopsies, 1,078 were males (56.0%) and the mean age was 37.7 ± 16.5 years. Asymptomatic urinary abnormalities were the most common clinical manifestation (62.5%). Immunoglobulin A nephropathy (IgAN) was the most common primary glomerular disease (37.4%), followed by minimal change disease (MCD), membranous nephropathy (MN), focal segmental glomerulonephritis and crescentic glomerulonephritis. Secondary glomerular diseases accounted for 10.3% of the total biopsies, with lupus nephritis being the most common (4.6%) followed by Henoch-Schönlein purpura nephritis and diabetic nephropathy. The most common cause of nephrotic syndrome was MCD (42.1%) followed by MN. Among patients seropositive for hepatitis B or C, IgAN (28.3% and 21.4%, respectively) was the most common cause. Conclusion: IgAN and lupus nephritis were the most common primary and secondary glomerular diseases, respectively. Race, region, and practice patterns may affect renal disease patterns in different cohorts.

Intracranial Metaplastic Meningioma : Clinical and Radio-logical Characteristics of 11 Cases

Kim, Taehoon,Kim, Jin Wook,Ji, So Young,Kang, Ho,Kim, Kyung-Min,Kim, Yong Hwy,Park, Chul-Kee,Choi, Seung Hong,Park, Sung-Hye The Korean Neurosurgical Society 2020 Journal of Korean neurosurgical society Vol.63 No.5

Objective : Metaplastic meningioma is an extremely rare subtype of World Health Organization (WHO) grade I meningioma. It has distinctive histological subtypes according to its own mesenchymal components. Owing to its scarcity, clinical or radiological features of a metaplastic meningioma are poorly described. Methods : Between 2004 and 2018, we analyzed total 1814 cases surgically proven meningioma for 15 years. Among them, metaplastic meningioma was diagnosed in 11 cases. Magnetic resonance images were taken for all patients, and computed tomography scan was taken for 10 patients. Results : WHO grade I meningiomas were 1376 cases (75.9%), 354 cases (19.5%) in WHO grade II, and 84 cases (4.6%) in WHO grade III meningiomas. Metaplastic meningioma was 11 cases as 0.8% of WHO grade I meningioma and 0.6% of entire meningiomas for 15 years. Among the entire 11 metaplastic meningiomas, five tumors (45%) were diagnosed as a lipomatous subtype with rich fat components, four (36%) as an osseous subtype with extensive bone formation and two (18%) as a xanthomatous subtype. There was no cartilaginous subtype metaplastic meningioma in our study. Lipomatous and osseous metaplastic meningioma have peculiar radiological characteristics according to mesenchymal components. Conclusion : We investigated a rare metaplastic meningioma subtype based on our 15-year surgical experience with meningiomas. Further investigation will be necessary for the clear clarification of tumor nature of this rare tumor.

Flexible double-cage hoist for high operational efficiency in tall building construction

Kim, Taehoon,Lee, Ung-Kyun,Kim, Seung Woo,Lim, Hyunsu,Kim, Chang-Won,Cho, Hunhee,Kang, Kyung-In Elsevier 2018 AUTOMATION IN CONSTRUCTION - Vol.96 No.-

<P><B>Abstract</B></P> <P>High operational efficiency in the use of hoists is crucial for the successful completion of high-rise building projects. Simply increasing the number of hoists may not be possible because of insufficient space or budget limits. However, adopting the “double-deck” concept can be an effective approach to improving the operational efficiency of hoists in projects with such constraints. This study proposes a flexible double-cage hoist for use in such projects. In a case study, we found that combining the proposed hoist with existing single-cage hoists enabled a smaller number of hoists to achieve significantly higher efficiency at lower cost than a group of single-cage hoists. The optimal combination showed a 16.6% decrease in total operational costs and a 7.9% increase in operational efficiency. Using the proposed hoist could therefore enable the successful completion of high-rise building projects at lower cost.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The flexible double-cage hoist is proposed for high-rise building projects. </LI> <LI> The flexible double-cage hoist copes flexibly with various traffic types by using a detachable adapter. </LI> <LI> The proposed hoists decreased costs by 16.6%.and increased operational efficiency by 7.9%. </LI> <LI> This study can contribute to the successful completion of a high-rise building project by enabling reduced cost inputs and higher operational efficiency. </LI> </UL> </P>

Highly Luminescent InP/GaP/ZnSNanocrystals and TheirApplication to White Light-Emitting Diodes

Kim, Sungwoo,Kim, Taehoon,Kang, Meejae,Kwak, SeongKwon,Yoo, Tae Wook,Park, Lee Soon,Yang, Ilseung,Hwang, Sunjin,Lee, Jung Eun,Kim, Seong Keun,Kim, Sang-Wook American Chemical Society 2012 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.134 No.8

<P>Highly stable and luminescent InP/GaP/ZnS QDs with a maximum quantum yield of 85% were synthesized by in situ method. The GaP shell rendered passivation of the surface and removed the traps. TCSPC data showed an evidence for the GaP shell. InP/GaP/ZnS QDs show better stability than InP/ZnS. We studied the optical properties of white QD-LEDs corresponding to various QD concentrations. Among various concentrations, the white QD-LEDs with 0.5 mL of QDs exhibited a luminous efficiency of 54.71 lm/W, Ra of 80.56, and CCT of 7864 K.</P>

A 4×32-Channel Neural Recording System for Deep Brain Stimulation Systems

Kim, Susie,Na, Seung-In,Yang, Youngtae,Kim, Hyunjong,Kim, Taehoon,Cho, Jun Soo,Kim, Jinhyung,Chang, Jin Woo,Kim, Suhwan The Institute of Electronics and Information Engin 2017 Journal of semiconductor technology and science Vol.17 No.1

In this paper, a $4{\times}32$-channel neural recording system capable of acquiring neural signals is introduced. Four 32-channel neural recording ICs, complex programmable logic devices (CPLDs), a micro controller unit (MCU) with USB interface, and a PC are used. Each neural recording IC, implemented in $0.18{\mu}m$ CMOS technology, includes 32 channels of analog front-ends (AFEs), a 32-to-1 analog multiplexer, and an analog-to-digital converter (ADC). The mid-band gain of the AFE is adjustable in four steps, and have a tunable bandwidth. The AFE has a mid-band gain of 54.5 dB to 65.7 dB and a bandwidth of 35.3 Hz to 5.8 kHz. The high-pass cutoff frequency of the AFE varies from 18.6 Hz to 154.7 Hz. The input-referred noise (IRN) of the AFE is $10.2{\mu}V_{rms}$. A high-resolution, low-power ADC with a high conversion speed achieves a signal-to-noise and distortion ratio (SNDR) of 50.63 dB and a spurious-free dynamic range (SFDR) of 63.88 dB, at a sampling-rate of 2.5 MS/s. The effectiveness of our neural recording system is validated in in-vivo recording of the primary somatosensory cortex of a rat.