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12. Wireless, multimodal sensors for continuous measurement of pressure, temperature, and hydration of patients in wheelchair

Author

Cho, Seokjoo, Han, Hyeonseok, Park, Hyunwoo, Lee, Sung-Uk, Kim, Jae-Hwan, Jeon, Sung Woo, Wang, Mengqiu, Avila, Raudel, Xi, Zhaoqian, Ko, Kabseok, Park, Minsu, Lee, Jungyup, Choi, Myungwoo, Lee, Je-Sang, Min, Weon Gi, Lee, Byeong-Ju, Lee, Soyeong, Choi, Jungrak, Gu, Jimin, Park, Jaeho, Kim, Min Seong, Ahn, Junseong, Gul, Osman, Han, Chankyu, Lee, Gihun, Kim, Seunghwan, Kim, Kyuyoung, Kim, Jeonghyun, Kang, Chang-Mo, Koo, Jahyun, Kwak, Sung Soo, Kim, Sungbong, Choi, Dong Yun, Jeon, Seokwoo, Sung, Hyung Jin, Park, Yong Bae, Je, Minkyu, Cho, Young Tae, Oh, Yong Suk, and Park, Inkyu

Published
2023
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13. Stopping Aspirin Within 1 Month After Stenting for Ticagrelor Monotherapy in Acute Coronary Syndrome: The T-PASS Randomized Noninferiority Trial

Author

Hong, Sung-Jin, Lee, Seung-Jun, Suh, Yongsung, Yun, Kyeong Ho, Kang, Tae Soo, Shin, Sanghoon, Kwon, Sung Woo, Lee, Jun-Won, Cho, Deok-Kyu, Park, Jong-Kwan, Bae, Jang-Whan, Kang, Woong Cheol, Kim, Seunghwan, Lee, Yong-Joon, Ahn, Chul-Min, Kim, Jung-Sun, Kim, Byeong-Keuk, Ko, Young-Guk, Choi, Donghoon, Jang, Yangsoo, and Hong, Myeong-Ki

Published
2024
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22. Reversible Polarity Control in 2D MoTe2 Field‐Effect Transistors for Complementary Logic Gate Applications.

Author

Yu, Byoung‐Soo, Kim, Wonsik, Jang, Jisu, Lee, Je‐Jun, Hong, Jung Pyo, Kwon, Namhee, Kim, Seunghwan, Ha, Aelim, Kim, Hong‐Kyu, Ahn, Jae‐Pyoung, Jeong, Kwangsik, Taniguchi, Takashi, Watanabe, Kenji, Wang, Gunuk, Ahn, Jongtae, Park, Soohyung, and Hwang, Do Kyung

Subjects
PHOTOELECTRON spectroscopy, LOGIC circuits, DENSITY of states, REVERSIBLE phase transitions, DENSITY functional theory, METAL oxide semiconductor field-effect transistors
Abstract

Precise control over polarity in field‐effect transistors (FETs) plays a pivotal role in the design and construction of complementary metal–oxide–semiconductor (CMOS) logic circuits. In particular, achieving such precise polarity control in 2D semiconductors is crucial for the further development of advanced electronic applications beyond unit devices. This paper presents a systematic investigation on the reversible transition of carrier types in a 2D MoTe2 semiconductor under different annealing atmospheres. Photoemission spectroscopy and density functional theory (DFT) calculations demonstrate that annealing processes in vacuum and in ambient air induce a modification in the density of states, resulting in alterations in p‐type or n‐type characteristics. These reversible changes are attributed to the physisorption and elimination of oxygen on the surface of MoTe2. Furthermore, it is found that the device geometry affects the polarity of the transistor. By strategically manipulating both the annealing conditions and the geometric configuration, the n‐ and p‐type unipolar characteristics of MoTe2 FETs are successfully modulated and ultimately demonstrating that the functionality of not only a complementary inverter with a high voltage gain of ≈20, but also more complex logic circuits of NAND and NOR gates. [ABSTRACT FROM AUTHOR]

Published
2024
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23. Improvement of the Stability of Quantum-Dot Light Emitting Diodes Using Inorganic HfO x Hole Transport Layer.

Author

Yun, Jung Min, Park, Min Ho, Kim, Yu Bin, Choi, Min Jung, Kim, Seunghwan, Yi, Yeonjin, Park, Soohyung, and Kang, Seong Jun

Subjects
LIGHT emitting diodes, QUANTUM dot LEDs, FERMI level, HAFNIUM oxide, TEMPERATURE control
Abstract

One of the major challenges in QLED research is improving the stability of the devices. In this study, we fabricated all inorganic quantum-dot light emitting diodes (QLEDs) using hafnium oxide (HfOx) as the hole transport layer (HTL), a material commonly used for insulator. Oxygen vacancies in HfOx create defect states below the Fermi level, providing a pathway for hole injection. The concentration of these oxygen vacancies can be controlled by the annealing temperature. We optimized the all-inorganic QLEDs with HfOx as the HTL by changing the annealing temperature. The optimized QLEDs with HfOx as the HTL showed a maximum luminance and current efficiency of 66,258 cd/m2 and 9.7 cd/A, respectively. The fabricated all-inorganic QLEDs exhibited remarkable stability, particularly when compared to devices using organic materials for the HTL. Under extended storage in ambient conditions, the all-inorganic device demonstrated a significantly enhanced operating lifetime (T50) of 5.5 h, which is 11 times longer than that of QLEDs using an organic HTL. These results indicate that the all-inorganic QLEDs structure, with ITO/MoO3/HfOx/QDs/ZnMgO/Al, exhibits superior stability compared to organic-inorganic hybrid QLEDs. [ABSTRACT FROM AUTHOR]

Published
2024
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24. Measuring cognitive effort using tabular transformer-based language models of electronic health record-based audit log action sequences.

Author

Kim, Seunghwan, Warner, Benjamin C, Lew, Daphne, Lou, Sunny S, and Kannampallil, Thomas

Abstract

Objectives To develop and validate a novel measure, action entropy, for assessing the cognitive effort associated with electronic health record (EHR)-based work activities. Materials and Methods EHR-based audit logs of attending physicians and advanced practice providers (APPs) from four surgical intensive care units in 2019 were included. Neural language models (LMs) were trained and validated separately for attendings' and APPs' action sequences. Action entropy was calculated as the cross-entropy associated with the predicted probability of the next action, based on prior actions. To validate the measure, a matched pairs study was conducted to assess the difference in action entropy during known high cognitive effort scenarios, namely, attention switching between patients and to or from the EHR inbox. Results Sixty-five clinicians performing 5 904 429 EHR-based audit log actions on 8956 unique patients were included. All attention switching scenarios were associated with a higher action entropy compared to non-switching scenarios (P  < .001), except for the from-inbox switching scenario among APPs. The highest difference among attendings was for the from-inbox attention switching: Action entropy was 1.288 (95% CI, 1.256-1.320) standard deviations (SDs) higher for switching compared to non-switching scenarios. For APPs, the highest difference was for the to-inbox switching, where action entropy was 2.354 (95% CI, 2.311-2.397) SDs higher for switching compared to non-switching scenarios. Discussion We developed a LM-based metric, action entropy, for assessing cognitive burden associated with EHR-based actions. The metric showed discriminant validity and statistical significance when evaluated against known situations of high cognitive effort (ie, attention switching). With additional validation, this metric can potentially be used as a screening tool for assessing behavioral action phenotypes that are associated with higher cognitive burden. Conclusion An LM-based action entropy metric—relying on sequences of EHR actions—offers opportunities for assessing cognitive effort in EHR-based workflows. [ABSTRACT FROM AUTHOR]

Published
2024
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25. Ticagrelor monotherapy for acute coronary syndrome: an individual patient data meta-analysis of TICO and T-PASS trials.

Author

Lee, Yong-Joon, Shin, Sanghoon, Kwon, Sung Woo, Suh, Yongsung, Yun, Kyeong Ho, Kang, Tae Soo, Lee, Jun-Won, Cho, Deok-Kyu, Park, Jong-Kwan, Bae, Jang-Whan, Kang, Woong Cheol, Kim, Seunghwan, Lee, Seung-Jun, Hong, Sung-Jin, Ahn, Chul-Min, Kim, Jung-Sun, Kim, Byeong-Keuk, Ko, Young-Guk, Choi, Donghoon, and Jang, Yangsoo

Subjects
ACUTE coronary syndrome, PLATELET aggregation inhibitors, MYOCARDIAL infarction, CLINICAL trials, TICAGRELOR
Abstract

Background and Aims In patients with acute coronary syndrome (ACS), dual antiplatelet therapy (DAPT) with aspirin and a potent P2Y12 inhibitor is recommended for 12 months after drug-eluting stent (DES) implantation. Monotherapy with a potent P2Y12 inhibitor after short-term DAPT is an attractive option to better balance the risks of ischaemia and bleeding. Therefore, this study evaluated the efficacy and safety of ticagrelor monotherapy after short-term DAPT, especially in patients with ACS. Methods Electronic databases were searched from inception to 11 November 2023, and for the primary analysis, individual patient data were pooled from the relevant randomized clinical trials comparing ticagrelor monotherapy after short-term (≤3 months) DAPT with ticagrelor-based 12-month DAPT, exclusively in ACS patients undergoing DES implantation. The co-primary endpoints were ischaemic endpoint (composite of all-cause death, myocardial infarction, or stroke) and bleeding endpoint [Bleeding Academic Research Consortium (BARC) type 3 or 5 bleeding] at 1 year. Results Individual patient data from two randomized clinical trials including 5906 ACS patients were analysed. At 1 year, the primary ischaemic endpoint did not differ between the ticagrelor monotherapy and ticagrelor-based DAPT groups [1.9% vs. 2.5%; adjusted hazard ratio (HR) 0.79; 95% confidence interval (CI) 0.56–1.13; P =.194]. The incidence of the primary bleeding endpoint was lower in the ticagrelor monotherapy group (2.4% vs. 4.5%; adjusted HR 0.54; 95% CI 0.40–0.72; P <.001). The results were consistent in a secondary aggregate data meta-analysis including the ACS subgroup of additional randomized clinical trials which enrolled patients with ACS as well as chronic coronary syndrome. Conclusions In ACS patients undergoing DES implantation, ticagrelor monotherapy after short-term DAPT was associated with less major bleeding without a concomitant increase in ischaemic events compared with ticagrelor-based 12-month DAPT. Study registration PROSPERO (ID: CRD42023476470). [ABSTRACT FROM AUTHOR]

Published
2024
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34. Photoelectron Spectroscopic Study of the Interfacial Electronic Structures of Metal‐Ion Containing Polyelectrolytes on ITO Substrates.

Author

Lee, Jin Hee, Khan, Yeasin, Kim, Seunghwan, Choi, Ae Jin, Walker, Bright, Park, Soohyung, and Seo, Jung Hwa

Subjects
FRONTIER orbitals, PHOTOELECTRON spectroscopy, X-ray photoelectron spectroscopy, POLYELECTROLYTES, ELECTRONIC band structure
Abstract

Research in the field of organic electronics has witnessed dramatic improvements in device performance over the past several decades through an ever‐improving understanding of electron and hole movement and the development of new interfacial materials. In this study, a type of interfacial material that relies on ionic charges comprising metal:poly(styrenesulfonate) (PSS) polyelectrolytes are synthesized and investigated as structural analogs of the ubiquitously used poly(3,4‐ethylenedioxythiophene:polystyrenesulfonate) (PEDOT:PSS) hole transport layer, in order to investigate correlations between metal cation ions and the cationic PEDOT component. The metal ions selected for this study include Li, Mg, V, Mn, Co, Ni, Cu, Zn, Pd, Ag, Cs, and Pb ions. To analyze the interfacial energy level alignment, electronic band structure, and band bending at the Indium tin oxide (ITO)/metal:PSS interface, X‐ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS) are employed. Alkali (earth) and post‐transition metals show deep highest occupied molecular orbital (HOMO) levels and low work function (WF) due to Fermi level balance, implying poor hole transport. Remarkably, Cu:PSS displays a unique electronic structure, suggesting potential as a hole transport layer with increased WF and low hole injection barrier. Period 5 transition metals mirror PEDOT:PSS trends, and Ag:PSS holds the potential to form effective ohmic contacts. [ABSTRACT FROM AUTHOR]

Published
2024
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36. Culprit-only versus multivessel or complete versus incomplete revascularization in patients with non-ST-segment elevation myocardial infarction and multivessel disease who underwent successful percutaneous coronary intervention using newer-generation drug-eluting stents

Author

Kim, Yong Hoon, Her, Ae-Young, Jeong, Myung Ho, Kim, Byeong-Keuk, Hong, Sung-Jin, Kim, Seunghwan, Ahn, Chul-Min, Kim, Jung-Sun, Ko, Young-Guk, Choi, Donghoon, Hong, Myeong-Ki, and Jang, Yangsoo

Published
2020
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42. Battery-free, wireless soft sensors for continuous multi-site measurements of pressure and temperature from patients at risk for pressure injuries

Author

Oh, Yong Suk, Kim, Jae-Hwan, Xie, Zhaoqian, Cho, Seokjoo, Han, Hyeonseok, Jeon, Sung Woo, Park, Minsu, Namkoong, Myeong, Avila, Raudel, Song, Zhen, Lee, Sung-Uk, Ko, Kabseok, Lee, Jungyup, Lee, Je-Sang, Min, Weon Gi, Lee, Byeong-Ju, Choi, Myungwoo, Chung, Ha Uk, Kim, Jongwon, Han, Mengdi, Koo, Jahyun, Choi, Yeon Sik, Kwak, Sung Soo, Kim, Sung Bong, Kim, Jeonghyun, Choi, Jungil, Kang, Chang-Mo, Kim, Jong Uk, Kwon, Kyeongha, Won, Sang Min, Baek, Janice Mihyun, Lee, Yujin, Kim, So Young, Lu, Wei, Vazquez-Guardado, Abraham, Jeong, Hyoyoung, Ryu, Hanjun, Lee, Geumbee, Kim, Kyuyoung, Kim, Seunghwan, Kim, Min Seong, Choi, Jungrak, Choi, Dong Yun, Yang, Quansan, Zhao, Hangbo, Bai, Wubin, Jang, Hokyung, Yu, Yongjoon, Lim, Jaeman, Guo, Xu, Kim, Bong Hoon, Jeon, Seokwoo, Davies, Charles, Banks, Anthony, Sung, Hyung Jin, Huang, Yonggang, Park, Inkyu, and Rogers, John A.

Published
2021
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44. Author Correction: Battery-free, wireless soft sensors for continuous multi-site measurements of pressure and temperature from patients at risk for pressure injuries

Author

Oh, Yong Suk, Kim, Jae-Hwan, Xie, Zhaoqian, Cho, Seokjoo, Han, Hyeonseok, Jeon, Sung Woo, Park, Minsu, Namkoong, Myeong, Avila, Raudel, Song, Zhen, Lee, Sung-Uk, Ko, Kabseok, Lee, Jungyup, Lee, Je-Sang, Min, Weon Gi, Lee, Byeong-Ju, Choi, Myungwoo, Chung, Ha Uk, Kim, Jongwon, Han, Mengdi, Koo, Jahyun, Choi, Yeon Sik, Kwak, Sung Soo, Kim, Sung Bong, Kim, Jeonghyun, Choi, Jungil, Kang, Chang-Mo, Kim, Jong Uk, Kwon, Kyeongha, Won, Sang Min, Baek, Janice Mihyun, Lee, Yujin, Kim, So Young, Lu, Wei, Vazquez-Guardado, Abraham, Jeong, Hyoyoung, Ryu, Hanjun, Lee, Geumbee, Kim, Kyuyoung, Kim, Seunghwan, Kim, Min Seong, Choi, Jungrak, Choi, Dong Yun, Yang, Quansan, Zhao, Hangbo, Bai, Wubin, Jang, Hokyung, Yu, Yongjoon, Lim, Jaeman, Guo, Xu, Kim, Bong Hoon, Jeon, Seokwoo, Davies, Charles, Banks, Anthony, Sung, Hyung Jin, Huang, Yonggang, Park, Inkyu, and Rogers, John A.

Published
2021
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50. C-67 | Ticagrelor monotherapy in ST-elevation myocardial infarction: An individual patient-level meta-analysis from TICO and T-PASS trials

Author

Hong, Myeong-Ki, Lee Lee, Yong-Joon, Cho, Deok-Kyu, Lee, Jun-Won, Shin, Sanghoon, Kwon, Sung Woo, Suh, Yongsung, Kang, Tae Soo, Park, Jong-Kwan, Bae, Jang-Whan, Kang, Woong C., Kim, Seunghwan, Lee, Seung-Jun, Hong, Sung-Jin, Ahn, Chul-Min, Kim, Jung-Sun, Kim, Byeong Keuk, Ko, Young-Guk, Choi, Donghoon Hoon, Jang, Yangsoo, and Yun, Kyeong-Ho

Published
2024
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