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Article: Physics-Informed, Data-Driven Model for Atmospheric Corrosion of Carbon Steel Using Bayesian Network.

Choi, Taesu / Lee, Dooyoul

2023 Volume 16, Issue 15

Abstract: Atmospheric corrosion is a significant challenge faced by the aviation industry as it considerably affects the structural integrity of an aircraft operated for long periods. Therefore, an appropriate corrosion deterioration model is required to predict ... ...

Abstract	Atmospheric corrosion is a significant challenge faced by the aviation industry as it considerably affects the structural integrity of an aircraft operated for long periods. Therefore, an appropriate corrosion deterioration model is required to predict corrosion problems. However, practical application of the deterioration model is challenging owing to the limited data available for the parameter estimation. Thus, a high uncertainty in prediction is unavoidable. To address these challenges, a method of integrating a physics-based model and the monitoring data on a Bayesian network (BN) is presented herein. Atmospheric corrosion is modeled using the simulation method, and a BN is constructed using GeNie. Moreover, model calibration is performed using the monitoring data collected from aircraft parking areas. The calibration approach is an improvement over existing models as it incorporates actual environmental data, making it more accurate and applicable to real-world scenarios. In conclusion, our research emphasizes the importance of precise corrosion models for predicting and managing atmospheric corrosion on carbon steel. The study results open new avenues for future research, such as the incorporation of additional data sources to further improve the accuracy of corrosion models.
Language	English
Publishing date	2023-07-28
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma16155326
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Selenium alloyed tellurium oxide for amorphous p-channel transistors.

Liu, Ao / Kim, Yong-Sung / Kim, Min Gyu / Reo, Youjin / Zou, Taoyu / Choi, Taesu / Bai, Sai / Zhu, Huihui / Noh, Yong-Young

Nature

2024

Abstract: Compared to polycrystalline semiconductors, amorphous semiconductors offer inherent cost-effective, simplicity, and uniform manufacturing. Traditional amorphous hydrogenated Si falls short in electrical properties, necessitating the exploration of new ... ...

Abstract	Compared to polycrystalline semiconductors, amorphous semiconductors offer inherent cost-effective, simplicity, and uniform manufacturing. Traditional amorphous hydrogenated Si falls short in electrical properties, necessitating the exploration of new materials. The creation of high-mobility amorphous n-type metal oxides, such as a-InGaZnO
Language	English
Publishing date	2024-04-10
Publishing country	England
Document type	Journal Article
ZDB-ID	120714-3
ISSN	1476-4687 ; 0028-0836
ISSN (online)	1476-4687
ISSN	0028-0836
DOI	10.1038/s41586-024-07360-w
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Zs.A 26: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG)
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Article ; Online: Self-Mixed Biphasic Liquid Metal Composite with Ultra-High Stretchability and Strain-Insensitivity for Neuromorphic Circuits.

Lee, Do Hoon / Lim, Taesu / Pyeon, Jeongsu / Park, Hyunmin / Lee, Sang-Won / Lee, Seungkyu / Kim, Wonsik / Kim, Min / Lee, Jeong-Chan / Kim, Do-Wan / Han, Seungmin / Kim, Hyoungsoo / Park, Steve / Choi, Yang-Kyu

Advanced materials (Deerfield Beach, Fla.)

2024 Volume 36, Issue 16, Page(s) e2310956

Abstract: Neuromorphic circuits that can function under extreme deformations are important for various data-driven wearable and robotic applications. Herein, biphasic liquid metal particle (BMP) with unprecedented stretchability and strain-insensitivity (ΔR/ ... ...

Abstract	Neuromorphic circuits that can function under extreme deformations are important for various data-driven wearable and robotic applications. Herein, biphasic liquid metal particle (BMP) with unprecedented stretchability and strain-insensitivity (ΔR/R
Language	English
Publishing date	2024-01-17
Publishing country	Germany
Document type	Journal Article
ZDB-ID	1474949-X
ISSN	1521-4095 ; 0935-9648
ISSN (online)	1521-4095
ISSN	0935-9648
DOI	10.1002/adma.202310956
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Affine-arithmetic-based microgrid interval optimization considering uncertainty and battery energy storage system degradation

Zhang, Xuehan / Son, Yongju / Cheong, Taesu / Choi, Sungyun

Energy. 2022 Mar. 01, v. 242

2022

Abstract: Microgrids can effectively integrate renewable energy sources (RESs) and provide power for local customers. However, uncertainties of RESs and loads pose challenges to microgrid operation. The traditional point optimization method is unrealistic, and the ...

Abstract	Microgrids can effectively integrate renewable energy sources (RESs) and provide power for local customers. However, uncertainties of RESs and loads pose challenges to microgrid operation. The traditional point optimization method is unrealistic, and the widely used stochastic optimization (SO) method is time-consuming. Besides, battery energy storage systems (BESSs) are critical dispatchable devices to alleviate adverse effects of uncertainty, so an accurate nonlinear degradation cost model of BESSs should also be proposed. To handle such problems, the paper proposes an affine–arithmetic (AA)-based microgrid interval optimization (IO) method considering uncertainty and BESS degradation. First, the AA theory is introduced to model the RES and load variation ranges as intervals and calculate the interval uncertainty. Then, a nonlinear BESS degradation cost model is proposed, which can assess battery degradation costs considering different charging and discharging behaviors. The nondominated sorting genetic algorithm-II (NSGA-II) is employed to solve the proposed microgrid IO framework. For validation, the proposed IO method was compared with the point optimization method and SO method under various uncertainty realizations in a modified IEEE 33 bus system. The simulation results indicated the effectiveness of the proposed IO method in terms of an equilibrium between the simulation time and optimization performance.
Keywords	batteries ; energy ; models ; renewable energy sources ; system optimization ; uncertainty
Language	English
Dates of publication	2022-0301
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	2019804-8
ISSN	0360-5442 ; 0360-5442
ISSN (online)	0360-5442
ISSN	0360-5442
DOI	10.1016/j.energy.2021.123015
Database	NAL-Catalogue (AGRICOLA)

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Article: Laricitrin 3-Rutinoside from

Lee, Sullim / Choi, Yea Jung / Huo, Chen / Alishir, Akida / Kang, Ki Sung / Park, Il-Ho / Jang, Taesu / Kim, Ki Hyun

Antioxidants (Basel, Switzerland)

2023 Volume 12, Issue 7

Abstract: Human skin comprises the epidermis and dermis, which perform interactive functional activities with each other in order to maintain the skin's tensile strength. In particular, the dermal layer is crucial for skin protection. However, skin aging destroys ... ...

Abstract	Human skin comprises the epidermis and dermis, which perform interactive functional activities with each other in order to maintain the skin's tensile strength. In particular, the dermal layer is crucial for skin protection. However, skin aging destroys collagen and elastin fibers, causing wrinkles, pigments, and sagging. Skin aging-related factors, such as tumor necrosis factor-α (TNF-α), promote the generation of intercellular reactive oxygen species (ROS). These are known to stimulate the hypersecretion of matrix metalloproteinase-1 (MMP-1), which degrades collagen and inhibits collagen synthesis. In this study, as part of our ongoing discovery of natural products, we investigated potential natural products derived from ginkgo fruit (
Language	English
Publishing date	2023-07-15
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2704216-9
ISSN	2076-3921
ISSN	2076-3921
DOI	10.3390/antiox12071432
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Antiskin Aging Effects of Indole Alkaloid

Choi, Yea Jung / Alishir, Akida / Jang, Taesu / Kang, Ki Sung / Lee, Sullim / Kim, Ki Hyun

Journal of agricultural and food chemistry

2022 Volume 70, Issue 42, Page(s) 13651–13660

Abstract: Human skin aging has internal and external factors, both of which are characterized by TNF-α overproduction. Therefore, we aimed to identify a natural product that suppresses the damage that occurs in cutaneous dermal fibroblasts exposed to TNF-α. The ... ...

Abstract	Human skin aging has internal and external factors, both of which are characterized by TNF-α overproduction. Therefore, we aimed to identify a natural product that suppresses the damage that occurs in cutaneous dermal fibroblasts exposed to TNF-α. The protective effects of the indole alkaloid
MeSH term(s)	Humans ; Ginkgo biloba/metabolism ; Tumor Necrosis Factor-alpha/metabolism ; Matrix Metalloproteinase 1/metabolism ; Interleukin-6/metabolism ; Glycosides/pharmacology ; Glycosides/metabolism ; Cyclooxygenase 2/metabolism ; Interleukin-8/genetics ; Interleukin-8/metabolism ; Fruit/metabolism ; Proto-Oncogene Proteins c-akt/metabolism ; Fibroblasts ; Cytokines/genetics ; Cytokines/metabolism ; Collagen/metabolism ; Indole Alkaloids/pharmacology ; Esters/metabolism
Chemical Substances	Tumor Necrosis Factor-alpha ; Matrix Metalloproteinase 1 (EC 3.4.24.7) ; Interleukin-6 ; Glycosides ; Cyclooxygenase 2 (EC 1.14.99.1) ; Interleukin-8 ; Proto-Oncogene Proteins c-akt (EC 2.7.11.1) ; Cytokines ; Collagen (9007-34-5) ; Indole Alkaloids ; Esters
Language	English
Publishing date	2022-10-17
Publishing country	United States
Document type	Journal Article
ZDB-ID	241619-0
ISSN	1520-5118 ; 0021-8561
ISSN (online)	1520-5118
ISSN	0021-8561
DOI	10.1021/acs.jafc.2c05769
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Zs.A 1172: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

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Article ; Online: Optical Transitions of a Single Nodal Ring in SrAs_{3}: Radially and Axially Resolved Characterization.

Jeon, Jiwon / Jang, Jiho / Kim, Hoil / Park, Taesu / Kim, Dongwook / Moon, Soonjae / Kim, Jun Sung / Shim, Ji Hoon / Min, Hongki / Choi, Eunjip

Physical review letters

2023 Volume 131, Issue 23, Page(s) 236903

Abstract: SrAs_{3} is a unique nodal-line semimetal that contains only a single nodal ring in the Brillouin zone, uninterrupted by any trivial bands near the Fermi energy. We performed axis-resolved optical reflection measurements on SrAs_{3} and observed that the ...

Abstract	SrAs_{3} is a unique nodal-line semimetal that contains only a single nodal ring in the Brillouin zone, uninterrupted by any trivial bands near the Fermi energy. We performed axis-resolved optical reflection measurements on SrAs_{3} and observed that the optical conductivity exhibits flat absorption up to 129 meV in both the radial and axial directions, confirming the robustness of the universal power-law behavior of the nodal ring. The axis-resolved optical conductivity, in combination with theoretical calculations, further reveals fundamental properties beyond the flat absorption, including the overlap energy of the topological bands, the spin-orbit coupling gap along the nodal ring, and the geometric properties of the nodal ring such as the average ring radius, ring ellipticity, and velocity anisotropy. In addition, our temperature-dependent measurements revealed a spectral weight transfer between intraband and interband transitions, indicating a possible violation of the optical sum rule within the measured energy range.
Language	English
Publishing date	2023-12-22
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.131.236903
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Z 4' 58/153: Show issues

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Book ; Online: Squeezing Large-Scale Diffusion Models for Mobile

Choi, Jiwoong / Kim, Minkyu / Ahn, Daehyun / Kim, Taesu / Kim, Yulhwa / Jo, Dongwon / Jeon, Hyesung / Kim, Jae-Joon / Kim, Hyungjun

2023

Abstract: The emergence of diffusion models has greatly broadened the scope of high-fidelity image synthesis, resulting in notable advancements in both practical implementation and academic research. With the active adoption of the model in various real-world ... ...

Abstract	The emergence of diffusion models has greatly broadened the scope of high-fidelity image synthesis, resulting in notable advancements in both practical implementation and academic research. With the active adoption of the model in various real-world applications, the need for on-device deployment has grown considerably. However, deploying large diffusion models such as Stable Diffusion with more than one billion parameters to mobile devices poses distinctive challenges due to the limited computational and memory resources, which may vary according to the device. In this paper, we present the challenges and solutions for deploying Stable Diffusion on mobile devices with TensorFlow Lite framework, which supports both iOS and Android devices. The resulting Mobile Stable Diffusion achieves the inference latency of smaller than 7 seconds for a 512x512 image generation on Android devices with mobile GPUs. Comment: 7 pages, 8 figures, ICML 2023 Workshop on Challenges in Deployable Generative AI
Keywords	Computer Science - Machine Learning ; Computer Science - Artificial Intelligence
Subject code	600
Publishing date	2023-07-03
Publishing country	us
Document type	Book ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article ; Online: Laricitrin 3-Rutinoside from Ginkgo biloba Fruits Prevents Damage in TNF-α-Stimulated Normal Human Dermal Fibroblasts

Lee, Sullim / Choi, Yea Jung / Huo, Zhen / Alishir, Akida / Kang, Ki Sung / Park, Il-Ho / Jang, Taesu / Kim, Ki Hyun

Antioxidants. 2023 July 15, v. 12, no. 7

2023

Abstract: Human skin comprises the epidermis and dermis, which perform interactive functional activities with each other in order to maintain the skin’s tensile strength. In particular, the dermal layer is crucial for skin protection. However, skin aging destroys ... ...

Abstract	Human skin comprises the epidermis and dermis, which perform interactive functional activities with each other in order to maintain the skin’s tensile strength. In particular, the dermal layer is crucial for skin protection. However, skin aging destroys collagen and elastin fibers, causing wrinkles, pigments, and sagging. Skin aging-related factors, such as tumor necrosis factor-α (TNF-α), promote the generation of intercellular reactive oxygen species (ROS). These are known to stimulate the hypersecretion of matrix metalloproteinase-1 (MMP-1), which degrades collagen and inhibits collagen synthesis. In this study, as part of our ongoing discovery of natural products, we investigated potential natural products derived from ginkgo fruit (Ginkgo biloba fruit) with protective effects against TNF-α-induced skin aging. Phytochemical investigation of the MeOH extract of G. biloba fruits, aided by liquid chromatography–mass spectrometry, led to the isolation of 14 compounds (1–14) from the n-butanol-soluble fraction. These were structurally determined to be: (E)-coniferin (1), syringin (2), 4-hydroxybenzoic acid 4-O-β-D-glucopyranoside (3), vanillic acid 4-O-β-D-glucopyranoside (4), glucosyringic acid (5), (E)-ferulic acid 4-O-β-D-glucoside (6), (E)-sinapic acid 4-O-β-D-glucopyranoside (7), ginkgotoxin-5-glucoside (8), ginkgopanoside (9), (Z)-4-coumaric acid 4-O-β-D-glucopyranoside (10), (1′R,2′S,5′R,8′S,2′Z,4′E)-dihydrophaseic acid 3’-O-β-D-glucopyranoside (11), eucomic acid (12), rutin (13), and laricitrin 3-rutinoside (L3R) (14). Biological evaluation of the isolated compounds for their effects on intracellular ROS generation showed that, of these 14 compounds, L3R (14) inhibited TNF-α-stimulated ROS generation (p < 0.001 at 100 μM). Inhibition of ROS generation by L3R led to the suppression of MMP-1 secretion and protection against collagen degradation. The inhibitory effect of L3R was mediated by the inhibition of extracellular signal regulated kinase (ERK) phosphorylation. Furthermore, L3R diminished the secretion of pro-inflammatory cytokines interleukin 6 (IL-6) and interleukin 8 (IL-8). Based on these experimental results, L3R is a potential bioactive natural product that can be used to protect against skin damage, including aging, in cosmetics and pharmaceuticals.
Keywords	4-hydroxybenzoic acid ; Ginkgo biloba ; biological assessment ; collagen ; cosmetics ; dermis ; drugs ; elastin ; fibroblasts ; fruits ; humans ; hypersecretion ; interleukin-6 ; interleukin-8 ; interstitial collagenase ; liquid chromatography ; mass spectrometry ; necrosis ; neoplasms ; phosphorylation ; reactive oxygen species ; rutin ; tensile strength ; vanillic acid
Language	English
Dates of publication	2023-0715
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article ; Online
ZDB-ID	2704216-9
ISSN	2076-3921
ISSN	2076-3921
DOI	10.3390/antiox12071432
Database	NAL-Catalogue (AGRICOLA)

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Book ; Online: Global liquidity transmission to emerging market economies, and their policy responses

Choi, Woon Gyu / Kang, Taesu / Kim, Geun Young / Lee, Byongju

(IMF working paper ; WP/17, 222)

2017

Author's details	by Woon Gyu Choi, Taesu Kang, Geun-Young Kim, and Byongju Lee
Series title	IMF working paper ; WP/17, 222
Keywords	Liquidität ; Inflationssteuerung ; Welt ; Panel ; VAR-Modell
Language	English
Size	1 Online-Ressource (circa 31 Seiten), Illustrationen
Publisher	International Monetary Fund
Publishing place	Washington, D.C.
Document type	Book ; Online
ISBN	9781484325216 ; 1484325214
DOI	10.5089/9781484325216.001
Database	ECONomics Information System

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