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  1. Article ; Online: Pathways to post-traumatic growth in Korean female cancer patients: the mediation effects of coping strategies and resilience.

    Choi, Sumi / Kim, Dongil / Cho, Ahyoung / An, Sohyun / Kim, Changhyun / Yoo, Inhwa

    European journal of psychotraumatology

    2023  Volume 14, Issue 1, Page(s) 2187187

    Abstract: ... ...

    Abstract ABSTRACT
    MeSH term(s) Middle Aged ; Humans ; Female ; Posttraumatic Growth, Psychological ; Quality of Life/psychology ; Adaptation, Psychological ; Neoplasms ; Republic of Korea
    Language English
    Publishing date 2023-03-14
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2586642-4
    ISSN 2000-8066 ; 2000-8066
    ISSN (online) 2000-8066
    ISSN 2000-8066
    DOI 10.1080/20008066.2023.2187187
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  2. Article ; Online: Comparison of visual quantities in untrained neural networks.

    Lee, Hyeonsu / Choi, Woochul / Lee, Dongil / Paik, Se-Bum

    Cell reports

    2023  Volume 42, Issue 8, Page(s) 112900

    Abstract: The ability to compare quantities of visual objects with two distinct measures, proportion and difference, is observed even in newborn animals. However, how this function originates in the brain, even before visual experience, remains unknown. Here, we ... ...

    Abstract The ability to compare quantities of visual objects with two distinct measures, proportion and difference, is observed even in newborn animals. However, how this function originates in the brain, even before visual experience, remains unknown. Here, we propose a model in which neuronal tuning for quantity comparisons can arise spontaneously in completely untrained neural circuits. Using a biologically inspired model neural network, we find that single units selective to proportions and differences between visual quantities emerge in randomly initialized feedforward wirings and that they enable the network to perform quantity comparison tasks. Notably, we find that two distinct tunings to proportion and difference originate from a random summation of monotonic, nonlinear neural activities and that a slight difference in the nonlinear response function determines the type of measure. Our results suggest that visual quantity comparisons are primitive types of functions that can emerge spontaneously before learning in young brains.
    MeSH term(s) Animals ; Neural Networks, Computer ; Brain/physiology ; Learning/physiology ; Neurons/physiology ; Brain Mapping
    Language English
    Publishing date 2023-07-29
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2649101-1
    ISSN 2211-1247 ; 2211-1247
    ISSN (online) 2211-1247
    ISSN 2211-1247
    DOI 10.1016/j.celrep.2023.112900
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  3. Article ; Online: Comparison of visual quantities in untrained neural networks

    Hyeonsu Lee / Woochul Choi / Dongil Lee / Se-Bum Paik

    Cell Reports, Vol 42, Iss 8, Pp 112900- (2023)

    2023  

    Abstract: Summary: The ability to compare quantities of visual objects with two distinct measures, proportion and difference, is observed even in newborn animals. However, how this function originates in the brain, even before visual experience, remains unknown. ... ...

    Abstract Summary: The ability to compare quantities of visual objects with two distinct measures, proportion and difference, is observed even in newborn animals. However, how this function originates in the brain, even before visual experience, remains unknown. Here, we propose a model in which neuronal tuning for quantity comparisons can arise spontaneously in completely untrained neural circuits. Using a biologically inspired model neural network, we find that single units selective to proportions and differences between visual quantities emerge in randomly initialized feedforward wirings and that they enable the network to perform quantity comparison tasks. Notably, we find that two distinct tunings to proportion and difference originate from a random summation of monotonic, nonlinear neural activities and that a slight difference in the nonlinear response function determines the type of measure. Our results suggest that visual quantity comparisons are primitive types of functions that can emerge spontaneously before learning in young brains.
    Keywords CP: Neuroscience ; Biology (General) ; QH301-705.5
    Subject code 612
    Language English
    Publishing date 2023-08-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
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  4. Article ; Online: The Effects of Data-based Instruction (DBI) for Students with Learning Difficulties in Korea

    Dongil Kim / Seohyeon Choi

    PLoS ONE, Vol 16, Iss 12, p e

    A Single-subject Meta-analysis.

    2021  Volume 0261120

    Abstract: Data-based instruction (DBI) is an ongoing process to utilize students' data for determining when and how to intensify intervention. It is an educational approach that is suggested as effective to enhance achievements of struggling learners, particularly ...

    Abstract Data-based instruction (DBI) is an ongoing process to utilize students' data for determining when and how to intensify intervention. It is an educational approach that is suggested as effective to enhance achievements of struggling learners, particularly for those who did not respond to intensive intervention in usual ways. In Korea, DBI was introduced and applied for students with learning difficulties especially since 2000 when the first Korea curriculum-based measurement (CBM) was developed as the name of Basic Academic Skills Assessment. Despite a number of studies accumulated since then, there has been a lack of research that examined the level of evidence-based practice (EBP) of DBI research. Thus, the present study sought to synthesize the DBI research so far in Korea by analyzing the effectiveness of DBI for school-aged students with learning difficulties via meta-analysis and evaluating the quality of the research. In this study, a total of 32 single-subject design studies were used. Multilevel meta-analysis revealed that the mean effect size of DBI was statistically significant (B = 1.34) and there was significant variance across participants in effect sizes. The results from the conditional model showed that exceptionality type, the number of sessions, and the length of each session were significantly accountable for the variability of effect sizes. In addition, the results of the qualitative analysis revealed the acceptable quality of the overall DBI research with some limitations. Based on these findings, implications and study limitations were discussed.
    Keywords Medicine ; R ; Science ; Q
    Subject code 370
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: The Effects of Data-based Instruction (DBI) for Students with Learning Difficulties in Korea: A Single-subject Meta-analysis.

    Kim, Dongil / Choi, Seohyeon

    PloS one

    2021  Volume 16, Issue 12, Page(s) e0261120

    Abstract: Data-based instruction (DBI) is an ongoing process to utilize students' data for determining when and how to intensify intervention. It is an educational approach that is suggested as effective to enhance achievements of struggling learners, particularly ...

    Abstract Data-based instruction (DBI) is an ongoing process to utilize students' data for determining when and how to intensify intervention. It is an educational approach that is suggested as effective to enhance achievements of struggling learners, particularly for those who did not respond to intensive intervention in usual ways. In Korea, DBI was introduced and applied for students with learning difficulties especially since 2000 when the first Korea curriculum-based measurement (CBM) was developed as the name of Basic Academic Skills Assessment. Despite a number of studies accumulated since then, there has been a lack of research that examined the level of evidence-based practice (EBP) of DBI research. Thus, the present study sought to synthesize the DBI research so far in Korea by analyzing the effectiveness of DBI for school-aged students with learning difficulties via meta-analysis and evaluating the quality of the research. In this study, a total of 32 single-subject design studies were used. Multilevel meta-analysis revealed that the mean effect size of DBI was statistically significant (B = 1.34) and there was significant variance across participants in effect sizes. The results from the conditional model showed that exceptionality type, the number of sessions, and the length of each session were significantly accountable for the variability of effect sizes. In addition, the results of the qualitative analysis revealed the acceptable quality of the overall DBI research with some limitations. Based on these findings, implications and study limitations were discussed.
    MeSH term(s) Child ; Curriculum ; Education, Special/methods ; Humans ; Learning/physiology ; Learning Disabilities/psychology ; Learning Disabilities/therapy ; Republic of Korea ; Students/psychology
    Language English
    Publishing date 2021-12-23
    Publishing country United States
    Document type Journal Article ; Meta-Analysis ; Research Support, Non-U.S. Gov't
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0261120
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  6. Article ; Online: Hydride-Containing Pt-doped Cu-rich Nanoclusters: Synthesis, Structure, and Electrocatalytic Hydrogen Evolution.

    Brocha Silalahi, Rhone P / Liang, Hao / Jo, Yongsung / Liao, Jian-Hong / Chiu, Tzu-Hao / Wu, Ying-Yann / Wang, Xiaoping / Kahlal, Samia / Wang, Qi / Choi, Woojun / Lee, Dongil / Saillard, Jean-Yves / Liu, C W

    Chemistry (Weinheim an der Bergstrasse, Germany)

    2024  Volume 30, Issue 13, Page(s) e202303755

    Abstract: A structurally precise hydride-containing Pt-doped Cu-rich nanocluster [ ... ...

    Abstract A structurally precise hydride-containing Pt-doped Cu-rich nanocluster [PtH
    Language English
    Publishing date 2024-01-12
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1478547-X
    ISSN 1521-3765 ; 0947-6539
    ISSN (online) 1521-3765
    ISSN 0947-6539
    DOI 10.1002/chem.202303755
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  7. Article ; Online: Synthetic Study of Dragmacidin E: Enantioselective Construction of the Seven-Membered Ring-Fused Indole Skeleton with Contiguous Stereocenters.

    Choi, Dongil / Takahashi, Noa / Maruoka, Haruka / Harada, Shingo / Nastke, Alina / Gröger, Harald / Nemoto, Tetsuhiro

    The Journal of organic chemistry

    2023  Volume 88, Issue 12, Page(s) 7674–7683

    Abstract: We developed an enantioselective synthetic method of constructing a seven-membered ring-fused indole skeleton with contiguous stereocenters for the synthesis of dragmacidin E. Introduction of chirality at the benzylic position was achieved by Ir- ... ...

    Abstract We developed an enantioselective synthetic method of constructing a seven-membered ring-fused indole skeleton with contiguous stereocenters for the synthesis of dragmacidin E. Introduction of chirality at the benzylic position was achieved by Ir-catalyzed asymmetric hydrogenation. After construction of the tricyclic molecular framework using Pd-catalyzed cascade cyclization, the tetrasubstituted carbon center was created using the Ag nitrene-mediated C-H amination reaction. The developed method provided access to the functionalized seven-membered ring-fused indole skeleton with a hydroxymethyl branch in the tetrasubstituted carbon.
    MeSH term(s) Stereoisomerism ; Catalysis ; Indole Alkaloids ; Carbon ; Skeleton
    Chemical Substances dragmacidin E ; Indole Alkaloids ; Carbon (7440-44-0)
    Language English
    Publishing date 2023-01-26
    Publishing country United States
    Document type Journal Article
    ZDB-ID 123490-0
    ISSN 1520-6904 ; 0022-3263
    ISSN (online) 1520-6904
    ISSN 0022-3263
    DOI 10.1021/acs.joc.2c02216
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    In stock of ZB MED Cologne/Königswinter

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    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
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  8. Article ; Online: ClAg

    Seong, Hoeun / Chang, Kiyoung / Sun, Fang / Lee, Sojung / Han, Sang Myeong / Kim, Yujin / Choi, Chang Hyuck / Tang, Qing / Lee, Dongil

    Advanced science (Weinheim, Baden-Wurttemberg, Germany)

    2023  Volume 11, Issue 10, Page(s) e2306089

    Abstract: Atomically precise metal nanoclusters (NCs) have emerged as a promising frontier in the field of electrochemical ... ...

    Abstract Atomically precise metal nanoclusters (NCs) have emerged as a promising frontier in the field of electrochemical CO
    Language English
    Publishing date 2023-12-25
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 2808093-2
    ISSN 2198-3844 ; 2198-3844
    ISSN (online) 2198-3844
    ISSN 2198-3844
    DOI 10.1002/advs.202306089
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  9. Article: The moderating effect of resilience on the relationship between academic stress and school adjustment in Korean students.

    Choi, Sumi / Yoo, Inhwa / Kim, Dongil / An, Sohyun / Sung, Yoonhee / Kim, Changhyun

    Frontiers in psychology

    2023  Volume 13, Page(s) 941129

    Abstract: Introduction: This study investigated the moderating effects of resilience on the relationship between academic stress and school adjustment among Korean adolescents. We examined the moderating effect for the total scores of school adjustment and the ... ...

    Abstract Introduction: This study investigated the moderating effects of resilience on the relationship between academic stress and school adjustment among Korean adolescents. We examined the moderating effect for the total scores of school adjustment and the two subscales of school adjustment (academic adjustment and general school adjustment).
    Methods: Data were obtained in Pusan, Korea, using the convenience sampling method, and a total of 674 participants' responses were used for the final analysis. Hierarchical regression analysis and multiple regression analysis were performed to examine our research questions.
    Results: The results of the study showed that academic stress was a significant predictor of school adjustment among Korean adolescents. More specifically, academic stress was related to poor school adjustment. The study also found that resilience has a significant mediating effect on the relationship between academic stress and school adjustment.
    Discussion: Our findings suggest that resilience is likely to alleviate the harmful effect of academic stress on school adjustment. Finally, implications for school-based intervention were discussed for providing practical academic assistance.
    Language English
    Publishing date 2023-01-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2563826-9
    ISSN 1664-1078
    ISSN 1664-1078
    DOI 10.3389/fpsyg.2022.941129
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  10. Article ; Online: The Developmentof Software to Automate the Laser Welding of a Liquefied Natural Gas Cargo Tank Using a Mobile Manipulator

    Taeyong Choi / Jongwoo Park / Jeongae Bak / Dongil Park / Hyunuk Seo / Sanghyun Kim

    Applied Sciences, Vol 14, Iss 1, p

    2023  Volume 134

    Abstract: The demand for liquefied natural gas (LNG) ships is increasing for various reasons. Despite their enormous size, cargo holds inside freighters transporting LNG have traditionally been constructed by welding to high-quality standards for safety. This ... ...

    Abstract The demand for liquefied natural gas (LNG) ships is increasing for various reasons. Despite their enormous size, cargo holds inside freighters transporting LNG have traditionally been constructed by welding to high-quality standards for safety. This process traditionally relies on manual labor or semi-automatic moving devices. In this study, a methodology was designed for robot-based automated laser welding inside large LNG cargo holds. The developed approach offers a practical solution to challenging issues such as the corrugation of the membrane that forms the inner walls of LNG cargo holds and the inter-floor movement of robots. This study analyzes and restructures the work for laser welding using mobile robots inside LNG cargo holds composed of membranes. For realistic constraints, such as inter-floor movement of robots and high-quality welding of membrane corrugations, methods integrated with manual work have been proposed. Additionally, for the overall membrane laser welding of the LNG cargo hold space, an automated method using robots was suggested. The developed methodology has been realized as operational software for the movement of robots for laser welding in LNG cargo holds.
    Keywords laser welding ; mobile manipulator ; LNG cargo hold ; offline programming ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
    Subject code 670 ; 629
    Language English
    Publishing date 2023-12-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
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