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Article ; Online: Retroperitoneal Ectopic Pregnancy Detected by CT: A Case Report.

Ryu, Sunjin / Lee, Chul-Min / Kang, Bo-Kyeong / Kim, Mimi

Journal of the Korean Society of Radiology

2024 Volume 85, Issue 1, Page(s) 217–221

Abstract: Retroperitoneal ectopic pregnancy is a rare form of ectopic pregnancy. Owing to its rarity and nonspecific symptoms, diagnosing retroperitoneal ectopic pregnancy at the initial presentation poses a significant challenge. Typically, the diagnosis relies ... ...

Abstract	Retroperitoneal ectopic pregnancy is a rare form of ectopic pregnancy. Owing to its rarity and nonspecific symptoms, diagnosing retroperitoneal ectopic pregnancy at the initial presentation poses a significant challenge. Typically, the diagnosis relies on non-radiation imaging modalities, such as ultrasonography and MRI, whereas CT is infrequently used. Herein, we report a rare case of a retroperitoneal ectopic pregnancy, which was diagnosed using CT.
Language	English
Publishing date	2024-01-10
Publishing country	Korea (South)
Document type	Case Reports
ISSN	2951-0805
ISSN (online)	2951-0805
DOI	10.3348/jksr.2023.0064
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Virtual Reality Metaverse System Supplementing Remote Education Methods

Hyeonju Lee / Donghyun Woo / Sunjin Yu

Applied Sciences, Vol 12, Iss 2667, p

Based on Aircraft Maintenance Simulation

2022 Volume 2667

Abstract: Due to the COVID-19 pandemic, there has been a shift from in-person to remote education, with most students taking classes via video meetings. This change inhibits active class participation from students. In particular, video education has limitations ... ...

Abstract	Due to the COVID-19 pandemic, there has been a shift from in-person to remote education, with most students taking classes via video meetings. This change inhibits active class participation from students. In particular, video education has limitations in replacing practical classes, which require both theoretical and empirical knowledge. In this study, we propose a system that incorporates virtual reality and metaverse methods into the classroom to compensate for the shortcomings of the existing remote models of practical education. Based on the proposed system, we developed an aircraft maintenance simulation and conducted an experiment comparing our system to a video training method. To measure educational effectiveness, knowledge acquisition, and retention tests were conducted and presence was investigated via survey responses. The results of the experiment show that the group using the proposed system scored higher than the video training group on both knowledge tests. As the responses given to the presence questionnaire confirmed a sense of spatial presence felt by the participants, the usability of the proposed system was judged to be appropriate.
Keywords	virtual reality ; presence ; metaverse ; education ; remote education ; technical training ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
Language	English
Publishing date	2022-03-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Wearable and Washable MnO

Noh, Jun Ho / Oh, Myoungeun / Kang, Sunjin / Lee, Hyeong Seok / Hong, Yeong Jun / Park, Chaeyeon / Lee, Raeyun / Choi, Changsoon

Nanomaterials (Basel, Switzerland)

2023 Volume 13, Issue 2

Abstract: Batteries are used in all types of electronic devices from conventional to advanced devices. Currently, batteries are evolving in the direction of extremely personalized yarn- or textile-structured textronic systems. However, the absence of a protective ... ...

Abstract	Batteries are used in all types of electronic devices from conventional to advanced devices. Currently, batteries are evolving in the direction of extremely personalized yarn- or textile-structured textronic systems. However, the absence of a protective layer on such batteries is a critical limitation to their practical use. In this study, we developed a wearable and washable MnO
Language	English
Publishing date	2023-01-07
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2662255-5
ISSN	2079-4991
ISSN	2079-4991
DOI	10.3390/nano13020265
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Article ; Online: Low-temperature n-type doping of insulating ultrathin amorphous indium oxide using H plasma-assisted annealing.

Seo, Hojun / Lee, Sang Yeon / Lee, Jeongsu / Kim, Sunjin / Sul, Onejae / Seo, Hyungtak / Lee, Seung-Beck

Nanotechnology

2022 Volume 33, Issue 20

Abstract: Low-temperature process compatibility is a key factor in successfully constructing additional functional circuits on top of pre-existing circuitry without corrupting characteristics thereof, a technique that typically requires die-to-die (wafer-to-wafer) ...

Abstract	Low-temperature process compatibility is a key factor in successfully constructing additional functional circuits on top of pre-existing circuitry without corrupting characteristics thereof, a technique that typically requires die-to-die (wafer-to-wafer) stacking and interconnecting. And against thermal annealing, which is mandatory and is possible only globally for activating amorphous oxide semiconductors, the selective control of electrical characteristics of the oxide thin-films for integrated circuit applications is challenging. Here, a low-temperature process that enables n-type doping of the designed region of insulating In
Language	English
Publishing date	2022-02-21
Publishing country	England
Document type	Journal Article
ZDB-ID	1362365-5
ISSN	1361-6528 ; 0957-4484
ISSN (online)	1361-6528
ISSN	0957-4484
DOI	10.1088/1361-6528/ac51ac
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Article ; Online: Sustainable Strategies for Synthesizing Lignin-Incorporated Bio-Based Waterborne Polyurethane with Tunable Characteristics

Bo Min Kim / Jin Sil Choi / Sunjin Jang / Hyeji Park / Seung Yeol Lee / Joonhoo Jung / Jaehyeung Park

Polymers, Vol 15, Iss 3987, p

2023 Volume 3987

Abstract: In this study, we introduce a novel approach for synthesizing lignin-incorporated castor-oil-based cationic waterborne polyurethane (CWPU-LX), diverging significantly from conventional waterborne polyurethane dispersion synthesis methods. Our innovative ... ...

Abstract	In this study, we introduce a novel approach for synthesizing lignin-incorporated castor-oil-based cationic waterborne polyurethane (CWPU-LX), diverging significantly from conventional waterborne polyurethane dispersion synthesis methods. Our innovative method efficiently reduces the required solvent quantity for CWPU-LX synthesis to approximately 50% of that employed in traditional WBPU experimental procedures. By incorporating lignin into the polyurethane matrix using this efficient and reduced-solvent method, CWPU-LX demonstrates enhanced properties, rendering it a promising material for diverse applications. Dynamic interactions between lignin and polyurethane molecules contribute to improved mechanical properties, enhanced thermal stability, and increased solvent resistance. Dynamic interactions between lignin and polyurethane molecules contribute to improved tensile strength, up to 250% compared to CWPU samples. Furthermore, the inclusion of lignin enhanced thermal stability, showcasing a 4.6% increase in thermal decomposition temperature compared to conventional samples and increased solvent resistance to ethanol. Moreover, CWPU-LX exhibits desirable characteristics such as protection against ultraviolet light and antibacterial properties. These unique properties can be attributed to the presence of the polyphenolic group and the three-dimensional structure of lignin, further highlighting the versatility and potential of this material in various application domains. The integration of lignin, a renewable and abundant resource, into CWPU-LX exemplifies the commitment to environmentally conscious practices and underscores the significance of greener materials in achieving a more sustainable future.
Keywords	bio-based polyurethane ; waterborne polyurethane ; lignin ; castor oil ; sustainability ; Organic chemistry ; QD241-441
Subject code	660
Language	English
Publishing date	2023-10-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Sustainable Strategies for Synthesizing Lignin-Incorporated Bio-Based Waterborne Polyurethane with Tunable Characteristics.

Kim, Bo Min / Choi, Jin Sil / Jang, Sunjin / Park, Hyeji / Lee, Seung Yeol / Jung, Joonhoo / Park, Jaehyeung

Polymers

2023 Volume 15, Issue 19

Abstract	In this study, we introduce a novel approach for synthesizing lignin-incorporated castor-oil-based cationic waterborne polyurethane (CWPU-LX), diverging significantly from conventional waterborne polyurethane dispersion synthesis methods. Our innovative method efficiently reduces the required solvent quantity for CWPU-LX synthesis to approximately 50% of that employed in traditional WBPU experimental procedures. By incorporating lignin into the polyurethane matrix using this efficient and reduced-solvent method, CWPU-LX demonstrates enhanced properties, rendering it a promising material for diverse applications. Dynamic interactions between lignin and polyurethane molecules contribute to improved mechanical properties, enhanced thermal stability, and increased solvent resistance. Dynamic interactions between lignin and polyurethane molecules contribute to improved tensile strength, up to 250% compared to CWPU samples. Furthermore, the inclusion of lignin enhanced thermal stability, showcasing a 4.6% increase in thermal decomposition temperature compared to conventional samples and increased solvent resistance to ethanol. Moreover, CWPU-LX exhibits desirable characteristics such as protection against ultraviolet light and antibacterial properties. These unique properties can be attributed to the presence of the polyphenolic group and the three-dimensional structure of lignin, further highlighting the versatility and potential of this material in various application domains. The integration of lignin, a renewable and abundant resource, into CWPU-LX exemplifies the commitment to environmentally conscious practices and underscores the significance of greener materials in achieving a more sustainable future.
Language	English
Publishing date	2023-10-04
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2527146-5
ISSN	2073-4360 ; 2073-4360
ISSN (online)	2073-4360
ISSN	2073-4360
DOI	10.3390/polym15193987
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Investigation on the performance enhancement of electric vehicle thermal management system utilizing floating loop with finite heat exchanger size

Lee, Sangwook / Chung, Yoong / Kim, Sunjin / Jeong, Yeonwoo / Kim, Min Soo

Energy conversion and management. 2022 Mar. 01, v. 255

2022

Abstract: This study suggests an electric vehicle heat pump and thermal management system employing a floating loop. The floating loop manages the thermal state of power electronics and electric motors by utilizing the liquid refrigerant at the condenser outlet. ... ...

Abstract	This study suggests an electric vehicle heat pump and thermal management system employing a floating loop. The floating loop manages the thermal state of power electronics and electric motors by utilizing the liquid refrigerant at the condenser outlet. This loop recovers the waste heat generated by power electronics and electric motors in winter and enhances the cooling performance in summer through the superior cooling performance of evaporative heat transfer. Configurations of heat pump and thermal management system are presented with operating schematic in summer and winter. To verify the performance of the suggested system, the heat pump and thermal management system model is established based on experimentally validated heat pump component models and electric device models. Heat exchangers are reallocated within a finite volume to investigate the effect of thermal load shift from the coolant to the refrigerant. The result shows that the heat pump system utilizing a floating loop with the largest refrigerant heat exchanger can save power consumptions in winter up to 27.7% and 5.8% in summer while maintaining the thermal state of electric devices within the appropriate range.
Keywords	electric vehicles ; electronics ; energy conversion ; heat exchangers ; heat pumps ; liquids ; management systems ; models ; summer ; winter
Language	English
Dates of publication	2022-0301
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2000891-0
ISSN	0196-8904
ISSN	0196-8904
DOI	10.1016/j.enconman.2022.115265
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: 감염성 척추염과 감별질환의 병태생리와 MRI 소견.

Ryu, Sunjin / Kim, Yeo Ju / Lee, Seunghun / Ryu, Jeongah / Park, Sunghoon / Hong, Jung Ui

Taehan Yongsang Uihakhoe chi

2021 Volume 82, Issue 6, Page(s) 1413–1440

Abstract: On MRI, abnormal signals of the intervertebral disc, destruction of the upper and lower vertebral body endplate around the disc, and bone marrow edema around the endplate are considered typical findings of infectious spondylitis. These findings can also ... ...

Title translation	Pathophysiology and MRI Findings of Infectious Spondylitis and the Differential Diagnosis.
Abstract	On MRI, abnormal signals of the intervertebral disc, destruction of the upper and lower vertebral body endplate around the disc, and bone marrow edema around the endplate are considered typical findings of infectious spondylitis. These findings can also appear in various non-infectious spinal diseases, such as degenerative changes, acute Schmorl's node, spondyloarthropathy, synovitis, acne, pustulosis, hyperostosis, and osteitis (SAPHO), chronic recurrent multifocal osteomyelitis, and calcium pyrophosphate dihydrate crystal deposition disease. The imaging findings of infectious spondylitis that can be differentiated from these non-infectious spinal diseases on MRI are high signal intensity and abscess of the disc space, an abscess in the paraspinal soft tissue, and the loss of the linear low signal intensity on T1-weighted images of the bony endplate. However, these differentiation points do not always apply since there are many similarities in the imaging findings of infectious and non-infectious diseases. Therefore, for an accurate diagnosis, it is important to know the imaging characteristics related to the pathophysiology of not only infectious spondylitis but also non-infectious spinal diseases, which requires differentiation from infection.
Language	Korean
Publishing date	2021-11-30
Publishing country	Korea (South)
Document type	English Abstract ; Journal Article ; Review
ISSN	2288-2928
ISSN (online)	2288-2928
DOI	10.3348/jksr.2021.0138
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Optimization of experimental conditions and measurement of oxygen consumption rate (OCR) in zebrafish embryos exposed to organophosphate flame retardants (OPFRs).

Lee, Sunjin / Lee, Hyojin / Kim, Ki-Tae

Ecotoxicology and environmental safety

2019 Volume 182, Page(s) 109377

Abstract: The measurement of oxygen consumption rate (OCR) provides a comprehensive understanding of mitochondrial metabolism. However, no study has been conducted to investigate the mitochondrial dysfunction caused by organophosphate flame retardants (OPFRs). The ...

Abstract	The measurement of oxygen consumption rate (OCR) provides a comprehensive understanding of mitochondrial metabolism. However, no study has been conducted to investigate the mitochondrial dysfunction caused by organophosphate flame retardants (OPFRs). The objectives of this study were to optimize the experimental conditions to measure OCR in zebrafish embryos using the Seahorse XFe 24 Extracellular Flux Analyzer, and to investigate the changes of OCR in zebrafish embryos exposed to OPFRs. We first optimized the experimental conditions such as the number of embryos, concentrations of inhibitors, and time points. We determined the factors, i.e., three embryos, 12.5 μM of oligomycin, 8 μM of carbonyl cyanaide 4-(trifluoromethoxy) phenylhydrazone (FCCP), and 24 hpf (hours post-fertilization) time point, for obtaining the typical pattern of OCR in dechorinated zebrafish embryos. After confirming the determinants upon exposure of triclosan, the inhibition of OCR was measured in zebrafish embryos exposed to two major OPFRs, triphenyl phosphate (TPHP) and tris (1,3-dichloro-2-propyl) phosphate (TDCIPP). We found that significant inhibition of OCR was observed in basal respiration for TPHP, and in basal and maximal respiration for TDCIPP exposure, respectively. We suggest the optimum conditions of the Seahorse XFe 24 analyzer to better evaluate OCR in zebrafish embryos, and demonstrate the potential of TPHP and TDCIPP to cause the disruption of energy metabolism associated with mitochondrial dysfunction.
MeSH term(s)	Animals ; Embryo, Nonmammalian/drug effects ; Embryo, Nonmammalian/metabolism ; Embryonic Development/drug effects ; Energy Metabolism/drug effects ; Flame Retardants/toxicity ; Models, Theoretical ; Organophosphates/toxicity ; Oxygen Consumption/drug effects ; Zebrafish/metabolism
Chemical Substances	Flame Retardants ; Organophosphates
Language	English
Publishing date	2019-06-26
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	436536-7
ISSN	1090-2414 ; 0147-6513
ISSN (online)	1090-2414
ISSN	0147-6513
DOI	10.1016/j.ecoenv.2019.109377
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Article: Reliability and Validity of the Subjective Cognitive Complaints Questionnaire for Parkinson's Disease (SCCQ-PD).

Ko, Jeongmin / Ha, Joonyoung / Lee, Jae Jung / Jin, Sunjin / Lee, Jongwoo / Baek, Min Seok / Hong, Jin Yong

Journal of clinical neurology (Seoul, Korea)

2022 Volume 18, Issue 2, Page(s) 171–178

Abstract: Background and purpose: Subjective cognitive complaints (SCCs) are gaining attention as a self-perceived symptom for cognitive impairment in patients with Parkinson's disease (PD), but there are few suitable tools for assessing SCCs in PD. This study ... ...

Abstract	Background and purpose: Subjective cognitive complaints (SCCs) are gaining attention as a self-perceived symptom for cognitive impairment in patients with Parkinson's disease (PD), but there are few suitable tools for assessing SCCs in PD. This study aimed to develop and validate a questionnaire for assessing SCCs in PD, called the Subjective Cognitive Complaints Questionnaire for Parkinson's Disease (SCCQ-PD). Methods: The SCCQ-PD consists of 12 yes/no questions on subjective cognitive function, and the questionnaire was completed by patients with PD (score-P) and their caregivers (score-C). The cognitive function of patients was examined using comprehensive neuropsychological tests. Results: This study included 73 patients (38 cognitively normal, 25 with mild cognitive impairment [MCI], and 10 demented) and their caregivers. Score-P and score-C had excellent reliability (Kuder-Richardson formula 20 coefficients of 0.893 and 0.931, respectively), and the scores exhibited a strong intercorrelation. Both score-P and score-C were negatively correlated with cognitive performance, and both were excellent in discriminating demented patients from those with normal cognition or MCI (areas under the receiver operating characteristic curve of 0.83 and 0.88, respectively). Conclusions: The SCCQ-PD is a reliable tool for assessing SCCs in patients with PD. SCCs measured using the SCCQ-PD are correlated with objective cognitive decline and useful for discriminating demented patients from nondemented patients.
Language	English
Publishing date	2022-02-14
Publishing country	Korea (South)
Document type	Journal Article
ZDB-ID	2500489-X
ISSN	2005-5013 ; 1738-6586
ISSN (online)	2005-5013
ISSN	1738-6586
DOI	10.3988/jcn.2022.18.2.171
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