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Article ; Online: Unraveling a Key Molecular Player Governing Pulmonary Alveolar Development.

Ding, Shihang / Deguchi, Shinji / Kim, Taeyoon

American journal of respiratory cell and molecular biology

2024 Volume 70, Issue 4, Page(s) 237–238

MeSH term(s)	Actins ; Lung ; Pulmonary Alveoli ; Myosins ; Neuropeptides
Chemical Substances	Actins ; drebrins ; Myosins (EC 3.6.4.1) ; Neuropeptides
Language	English
Publishing date	2024-02-20
Publishing country	United States
Document type	Editorial ; Comment
ZDB-ID	1025960-0
ISSN	1535-4989 ; 1044-1549
ISSN (online)	1535-4989
ISSN	1044-1549
DOI	10.1165/rcmb.2024-0025ED
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Article ; Online: The Impact of Indigenous People’s Pre-existing Information on Rice Farming

Bheomseok Kim / Taeyoon Kim

East Asian Economic Review, Vol 27, Iss 1, Pp 3-

Findings from Laos

2023 Volume 31

Abstract: Dissemination of information can enhance smallholder farmers’ agricultural outcomes and incomes in developing countries. However, the impact evaluation for new information can be inaccurate without considering pre-existing information that the indigenous ...

Abstract	Dissemination of information can enhance smallholder farmers’ agricultural outcomes and incomes in developing countries. However, the impact evaluation for new information can be inaccurate without considering pre-existing information that the indigenous people have used. This study explores qualitative causal links between existing agricultural information used by Lao smallholder farmers on rice yield and selling price with 180 household data. We categorized the pre-existing information into weather, farming technique, input, intermediate trader, and sales price. The source of each piece of information is used as an instrumental variable to overcome the endogeneity issue between information use and agricultural outcomes. Using farming technique information positively affects rice yields by 57.1% compared to those without that information. Moreover, intermediate trader and crop sales information result in 64.5% and 60.0% higher selling prices than non-user groups. A statistically significant causal relationship exists with agricultural outcomes. The more genuine impact should be measured with a newly updated impact evaluation approach that considers this preexisting agricultural information.
Keywords	pre-existing information ; endogeneity ; rice ; laos ; Economics as a science ; HB71-74
Subject code	306
Language	English
Publishing date	2023-03-01T00:00:00Z
Publisher	Korea Institute for International Economic Policy
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Atomic layer deposition of SnS

Kim, Jungtae / Lee, Dowwook / Bae, Jangho / Lee, Taeyoon / Jeon, Hyeongtag

Nanotechnology

2024 Volume 35, Issue 20

Abstract: Two-dimensional (2D) materials are attracting attention because of their outstanding physical, chemical, and electrical properties for applications of various future devices such as back-end-of-line field effect transistor (BEOL FET). Among many 2D ... ...

Abstract	Two-dimensional (2D) materials are attracting attention because of their outstanding physical, chemical, and electrical properties for applications of various future devices such as back-end-of-line field effect transistor (BEOL FET). Among many 2D materials, tin disulfide (SnS
Language	English
Publishing date	2024-02-27
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/ad2573
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Article ; Online: A Cluster-Driven Adaptive Training Approach for Federated Learning.

Jeong, Younghwan / Kim, Taeyoon

Sensors (Basel, Switzerland)

2022 Volume 22, Issue 18

Abstract: Federated learning (FL) is a promising collaborative learning approach in edge computing, reducing communication costs and addressing the data privacy concerns of traditional cloud-based training. Owing to this, diverse studies have been conducted to ... ...

Abstract	Federated learning (FL) is a promising collaborative learning approach in edge computing, reducing communication costs and addressing the data privacy concerns of traditional cloud-based training. Owing to this, diverse studies have been conducted to distribute FL into industry. However, there still remain the practical issues of FL to be solved (e.g., handling non-IID data and stragglers) for an actual implementation of FL. To address these issues, in this paper, we propose a cluster-driven adaptive training approach (CATA-Fed) to enhance the performance of FL training in a practical environment. CATA-Fed employs adaptive training during the local model updates to enhance the efficiency of training, reducing the waste of time and resources due to the presence of the stragglers and also provides a straggler mitigating scheme, which can reduce the workload of straggling clients. In addition to this, CATA-Fed clusters the clients considering the data size and selects the training participants within a cluster to reduce the magnitude differences of local gradients collected in the global model update under a statistical heterogeneous condition (e.g., non-IID data). During this client selection process, a proportional fair scheduling is employed for securing the data diversity as well as balancing the load of clients. We conduct extensive experiments using three benchmark datasets (MNIST, Fashion-MNIST, and CIFAR-10), and the results show that CATA-Fed outperforms the previous FL schemes (FedAVG, FedProx, and TiFL) with regard to the training speed and test accuracy under the diverse FL conditions.
MeSH term(s)	Algorithms ; Humans ; Learning ; Machine Learning
Language	English
Publishing date	2022-09-18
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2052857-7
ISSN	1424-8220 ; 1424-8220
ISSN (online)	1424-8220
ISSN	1424-8220
DOI	10.3390/s22187061
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Probing stress-regulated ordering of the plant cortical microtubule array via a computational approach.

Li, Jing / Szymanski, Daniel B / Kim, Taeyoon

BMC plant biology

2023 Volume 23, Issue 1, Page(s) 308

Abstract: Background: Morphological properties of tissues and organs rely on cell growth. The growth of plant cells is determined by properties of a tough outer cell wall that deforms anisotropically in response to high turgor pressure. Cortical microtubules bias ...

Abstract	Background: Morphological properties of tissues and organs rely on cell growth. The growth of plant cells is determined by properties of a tough outer cell wall that deforms anisotropically in response to high turgor pressure. Cortical microtubules bias the mechanical anisotropy of a cell wall by affecting the trajectories of cellulose synthases in the wall that polymerize cellulose microfibrils. The microtubule cytoskeleton is often oriented in one direction at cellular length-scales to regulate growth direction, but the means by which cellular-scale microtubule patterns emerge has not been well understood. Correlations between the microtubule orientation and tensile forces in the cell wall have often been observed. However, the plausibility of stress as a determining factor for microtubule patterning has not been directly evaluated to date. Results: Here, we simulated how different attributes of tensile forces in the cell wall can orient and pattern the microtubule array in the cortex. We implemented a discrete model with transient microtubule behaviors influenced by local mechanical stress in order to probe the mechanisms of stress-dependent patterning. Specifically, we varied the sensitivity of four types of dynamic behaviors observed on the plus end of microtubules - growth, shrinkage, catastrophe, and rescue - to local stress. Then, we evaluated the extent and rate of microtubule alignments in a two-dimensional computational domain that reflects the structural organization of the cortical array in plant cells. Conclusion: Our modeling approaches reproduced microtubule patterns observed in simple cell types and demonstrated that a spatial variation in the magnitude and anisotropy of stress can mediate mechanical feedback between the wall and of the cortical microtubule array.
MeSH term(s)	Microtubules/metabolism ; Cytoskeleton/metabolism ; Plants/metabolism ; Cell Wall/metabolism ; Cellulose/metabolism
Chemical Substances	Cellulose (9004-34-6)
Language	English
Publishing date	2023-06-09
Publishing country	England
Document type	Journal Article
ZDB-ID	2059868-3
ISSN	1471-2229 ; 1471-2229
ISSN (online)	1471-2229
ISSN	1471-2229
DOI	10.1186/s12870-023-04252-5
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Article ; Online: Emergence of diverse patterns driven by molecular motors in the motility assay.

Slater, Brandon / Jung, Wonyeong / Kim, Taeyoon

Cytoskeleton (Hoboken, N.J.)

2023

Abstract: Actomyosin contractility originating from interactions between F-actin and myosin motors in the actin cytoskeleton generates mechanical forces and drives a wide range of cellular processes including cell migration and cytokinesis. To probe the ... ...

Abstract	Actomyosin contractility originating from interactions between F-actin and myosin motors in the actin cytoskeleton generates mechanical forces and drives a wide range of cellular processes including cell migration and cytokinesis. To probe the interactions between F-actin and myosin motors, the myosin motility assay has been popularly employed, which consists of myosin heads attached to a glass surface and F-actins gliding on the surface via interactions with the heads. Several experiments have shown that F-actins move in a collective fashion due to volume-exclusion effects between neighboring F-actins. Furthermore, Computational models have shown how changes in key parameters lead to diverse pattern formation in motility assay. However, in most of the computational models, myosin motors were implicitly considered by applying a constant propulsion force to filaments to reduce computational cost. This simplification limits the physiological relevance of the insights provided by the models and potentially leads to artifacts. In this study, we employed an agent-based computational model for the motility assay with explicit immobile motors interacting with filaments. We rigorously account for the kinetics of myosin motors including the force-velocity relationship for walking and the binding and unbinding behaviors. We probed the effects of the length, rigidity, and concentration of filaments and repulsive strength on collective movements and pattern formation. It was found that four distinct types of structures-homogeneous networks, flocks, bands, and rings-emerged as a result of collisions between gliding filaments. We further analyzed the frequency and morphology of these structures and the curvature, alignment, and rotational motions of filaments. Our study provides better insights into the origin and properties of patterns formed by gliding filaments beyond what was shown before.
Language	English
Publishing date	2023-11-10
Publishing country	United States
Document type	Journal Article
ZDB-ID	2534372-5
ISSN	1949-3592 ; 1949-3584
ISSN (online)	1949-3592
ISSN	1949-3584
DOI	10.1002/cm.21808
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Article ; Online: Communication Delay Outlier Detection and Compensation for Teleoperation Using Stochastic State Estimation.

Kim, Eugene / Hwang, Myeonghwan / Lim, Taeyoon / Jeong, Chanyeong / Yoon, Seungha / Cha, Hyunrok

Sensors (Basel, Switzerland)

2024 Volume 24, Issue 4

Abstract: There have been numerous studies attempting to overcome the limitations of current autonomous driving technologies. However, there is no doubt that it is challenging to promise integrity of safety regarding urban driving scenarios and dynamic driving ... ...

Abstract	There have been numerous studies attempting to overcome the limitations of current autonomous driving technologies. However, there is no doubt that it is challenging to promise integrity of safety regarding urban driving scenarios and dynamic driving environments. Among the reported countermeasures to supplement the uncertain behavior of autonomous vehicles, teleoperation of the vehicle has been introduced to deal with the disengagement of autonomous driving. However, teleoperation can lead the vehicle to unforeseen and hazardous situations from the viewpoint of wireless communication stability. In particular, communication delay outliers that severely deviate from the passive communication delay should be highlighted because they could hamper the cognition of the circumstances monitored by the teleoperator, or the control signal could be contaminated regardless of the teleoperator's intention. In this study, communication delay outliers were detected and classified based on the stochastic approach (passive delays and outliers were estimated as 98.67% and 1.33%, respectively). Results indicate that communication delay outliers can be automatically detected, independently of the real-time quality of wireless communication stability. Moreover, the proposed framework demonstrates resilience against outliers, thereby mitigating potential performance degradation.
Language	English
Publishing date	2024-02-15
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2052857-7
ISSN	1424-8220 ; 1424-8220
ISSN (online)	1424-8220
ISSN	1424-8220
DOI	10.3390/s24041241
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: A modified motor-clutch model reveals that neuronal growth cones respond faster to soft substrates.

Cifuentes, Laura Pulido / Athamneh, Ahmad I M / Efremov, Yuri / Raman, Arvind / Kim, Taeyoon / Suter, Daniel M

Molecular biology of the cell

2024 Volume 35, Issue 4, Page(s) ar47

Abstract: Neuronal growth cones sense a variety of cues including chemical and mechanical ones to establish functional connections during nervous system development. Substrate-cytoskeletal coupling is an established model for adhesion-mediated growth cone advance; ...

Abstract	Neuronal growth cones sense a variety of cues including chemical and mechanical ones to establish functional connections during nervous system development. Substrate-cytoskeletal coupling is an established model for adhesion-mediated growth cone advance; however, the detailed molecular and biophysical mechanisms underlying the mechanosensing and mechanotransduction process remain unclear. Here, we adapted a motor-clutch model to better understand the changes in clutch and cytoskeletal dynamics, traction forces, and substrate deformation when a growth cone interacts with adhesive substrates of different stiffnesses. Model parameters were optimized using experimental data from
MeSH term(s)	Growth Cones/metabolism ; Mechanotransduction, Cellular ; Actins/metabolism ; Cytoskeleton/metabolism ; Retinal Cone Photoreceptor Cells
Chemical Substances	Actins
Language	English
Publishing date	2024-02-14
Publishing country	United States
Document type	Journal Article
ZDB-ID	1098979-1
ISSN	1939-4586 ; 1059-1524
ISSN (online)	1939-4586
ISSN	1059-1524
DOI	10.1091/mbc.E23-09-0364
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Zs.A 2853: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (2.OG) ab Jg. 2022: Lesesaal (EG)
Zs.MO 410: Show issues

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Article ; Online: Myosin-induced F-actin fragmentation facilitates contraction of actin networks.

Matsuda, Kyohei / Jung, Wonyeong / Sato, Yusei / Kobayashi, Takuya / Yamagishi, Masahiko / Kim, Taeyoon / Yajima, Junichiro

Cytoskeleton (Hoboken, N.J.)

2024

Abstract: Mechanical forces play a crucial role in diverse physiological processes, such as cell migration, cytokinesis, and morphogenesis. The actin cytoskeleton generates a large fraction of the mechanical forces via molecular interactions between actin ... ...

Abstract	Mechanical forces play a crucial role in diverse physiological processes, such as cell migration, cytokinesis, and morphogenesis. The actin cytoskeleton generates a large fraction of the mechanical forces via molecular interactions between actin filaments (F-actins) and myosin motors. Recent studies have shown that the common tendency of actomyosin networks to contract into a smaller structure deeply involves F-actin buckling induced by motor activities, fragmentation of F-actins, and the force-dependent unbinding of cross-linkers that inter-connect F-actins. The fragmentation of F-actins was shown to originate from either buckling or tensile force from previous single-molecule experiments. While the role of buckling in network contraction has been studied extensively, to date, the role of tension-induced F-actin fragmentation in network contraction has not been investigated. In this study, we employed in vitro experiments and an agent-based computational model to illuminate when and how the tension-induced F-actin fragmentation facilitates network contraction. Our experiments demonstrated that F-actins can be fragmented due to tensile forces, immediately followed by catastrophic rupture and contraction of networks. Using the agent-based model, we showed that F-actin fragmentation by tension results in distinct rupture dynamics different from that observed in networks only with cross-linker unbinding. Moreover, we found that tension-induced F-actin fragmentation is particularly important for the contraction of networks with high connectivity. Results from our study shed light on an important regulator of the contraction of actomyosin networks which has been neglected. In addition, our results provide insights into the rupture mechanisms of polymeric network structures and bio-inspired materials.
Language	English
Publishing date	2024-03-08
Publishing country	United States
Document type	Journal Article
ZDB-ID	2534372-5
ISSN	1949-3592 ; 1949-3584
ISSN (online)	1949-3592
ISSN	1949-3584
DOI	10.1002/cm.21848
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Article ; Online: Performance Analysis of Synchronous Multi-Radio Multi-Link MAC Protocols in IEEE 802.11be Extremely High Throughput WLANs

Taewon Song / Taeyoon Kim

Applied Sciences, Vol 11, Iss 317, p

2021 Volume 317

Abstract: The representative media access control (MAC) mechanism of IEEE 802.11 is a distributed coordination function (DCF), which operates based on carrier-sense multiple access with collision avoidance (CSMA/CA) with binary exponential backoff. The next ... ...

Abstract	The representative media access control (MAC) mechanism of IEEE 802.11 is a distributed coordination function (DCF), which operates based on carrier-sense multiple access with collision avoidance (CSMA/CA) with binary exponential backoff. The next amendment of IEEE 802.11 being developed for future Wi-Fi by the task group-be is called IEEE 802.11be, where the multi-link operation is mainly discussed when it comes to MAC layer operation. The multi-link operation discussed in IEEE 802.11be allows multi-link devices to establish multiple links and operate them simultaneously. Since the medium access on a link may affect the other links, and the conventional MAC mechanism has just taken account of a single link, the DCF should be used after careful consideration for multi-link operation. In this paper, we summarize the DCFs being reviewed to support the multi-radio multi-link operation in IEEE 802.11be and analyze their performance using the Markov chain model. Throughout the extensive performance evaluation, we summarize each MAC protocol’s pros and cons and discuss essential findings of the candidate MAC protocols.
Keywords	802.11 ; access protocols ; Markov chain ; multi-link ; stochastic processes ; wireless LAN ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
Language	English
Publishing date	2021-12-01T00:00:00Z
Publisher	MDPI AG
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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