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Association between heart failure severity and mobility in geriatric patients: an in-clinic study with wearable sensors

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Journal of Geriatric Cardiology 2022年第9期19卷 660-674页

作者： Tobias Braun Anna Wiegard Johanna Geritz Clint Hansen kim eng tan Hanna Hildesheim Jennifer Kudelka Corina Maetzler Julius Welzel Robbin Romijnders Walter Maetzler Philipp Bergmann Department of Neurology Kiel UniversityArnold-Heller-Straße 324105 KielGermany Department of Internal Medicine I Christian-Albrechts-University of KielArnold-Heller-Straße 324105 KielGermany Department of Applied Health Sciences Division of PhysiotherapyHochschule für Gesundheit(University of Applied Sciences)Gesundheits-campus 6-844801 BochumGermany HSD Hochschule Döpfer(University of Applied Sciences) Waidmarkt 3 und 950676 CologneGermany

BACKGROUND Individuals with heart failure(HF) frequently experience limitations in mobility, but specific aspects of these limitations are not well understood. This study investigated the association of HF severity, based on the New York Heart Association(NYHA) classes, with digital mobility outcomes(DMOs) and handgrip strength in older inpatients with *** For this explorative analysis, hospital admission and discharge data from an ongoing, prospective cohort study were used. The sample included older participants with HF and a sub-sample of heart-healthy individuals. Participants were equipped with a wearable inertial measurement unit(IMU) system during mobility performance(balancing, sit-to-stand transfer,walking). We analyzed the association between 17 DMOs and HF severity with multiple linear regression *** The total sample included 61 older participants(65–97 years of age, 55.7% female). Of all DMOs, only sway path in a semi-tandem stance position(m/s^(2)) showed a relevant association with NYHA classes(admission: β =-0.28, P = 0.09;discharge:β =-0.39, P = 0.02). Handgrip strength showed a trend towards a significant association(admission: β =-0.15, P = 0.10;discharge:β =-0.15, P = 0.19).CONCLUSIONS This is to our best knowledge the first analysis on the association of HF severity and IMU-based DMOs. Sway path and handgrip strength may be the most promising parameters for monitoring mobility aspects in treatment of HF.

关键词： severity wear limitations

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YOLO-Based Damage Detection with StyleGAN3 Data Augmentation for Parcel Information-Recognition System

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Computers, Materials & Continua 2024年第7期80卷 195-215页

作者： Seolhee kim Sang-Duck Lee Department of Electrical and Computer engineering Sungkyunkwan UniversitySuwon16419Republic of Korea Logistics System Research Division Korea Railroad Research InstituteUiwang16105Republic of Korea

Damage to parcels reduces customer satisfactionwith delivery services and increases return-logistics *** can be prevented by detecting and addressing the damage before the parcels reach the ***,various studies have been conducted on deep learning techniques related to the detection of parcel *** study proposes a deep learning-based damage detectionmethod for various types of *** is intended to be part of a parcel information-recognition systemthat identifies the volume and shipping information of parcels,and determines whether they are damaged;this method is intended for use in the actual parcel-transportation *** this purpose,1)the study acquired image data in an environment simulating the actual parcel-transportation process,and 2)the training dataset was expanded based on StyleGAN3 with adaptive discriminator ***,3)a preliminary distinction was made between the appearance of parcels and their damage status to enhance the performance of the parcel damage detection model and analyze the causes of parcel ***,using the dataset constructed based on the proposed method,a damage type detection model was trained,and its mean average precision was *** model can improve customer satisfaction and reduce return costs for parcel delivery companies.

关键词： Parcel delivery service damage detection damage classification data augmentation generative adversarial network

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Randomly Generating Four Mixed Bell-Diagonal States with a Concurrences Sum to Unity

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Chinese Physics Letters 2012年第1期29卷 24-27页

作者： S.P.Toh Hishamuddin Zainuddin kim eng Foo Faculty of engineering The University of Nottingham Malaysia CampusJalan Broga43500 SemenyihSelangor Darul EhsanMalaysia Laboratory of Computational Sciences and Mathematical Physics Institute for Mathematical ResearchUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia Department of Physics Faculty of ScienceUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia Faculty of Health and Life Sciences INTI International UniversityPersiaran Perdana BBNPutra Nilai71800 NilaiNegeri SembilanMalaysia

A two-qubit system in quantum information theory is the simplest bipartite quantum system and its concurrence for pure and mixed states is well *** a subset of two-qubit systems,Bell-diagonal states can be depicted by a very simple geometrical representation of a tetrahedron with sides of length 2√*** on this geometric representation,we propose a simple approach to randomly generate four mixed Bell decomposable states in which the sum of their concurrence is equal to one.

关键词： quantum concurrence representation

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FORCED VIBRATION AND SOUND RADIATION OF A RECtanGULAR PLATE WITH VISCOELASTIC BOUNDARY SUPPORTS

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Chinese Journal of Mechanical engineering 1999年第4期12卷 276-281,316页

作者： Fan Zijie Dept of Automotive eng.,Qinghua University kim Kwang Joon Dept of Mechanical eng.,KAIST,Korea Qinghua Univ China

A method for the forced vibration and sound radiation of a rectangular plate with viscoelastic boundary supports is *** method is based on damped complex modes analysis *** the damped complex modes of the plate system,the modal equation of the plate motion becomes completely *** sound radiation pressure is obtained by numerical integration of the Rayleigh *** of the viscoelastic boundary supports on the vibration response and the radiated sound pressure of the vibrating plate are discussed by an example.

关键词： Vibration Viscoelastic damping Supports Sound radiation

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Calculations of Forming Limit Diagrams for Changing Strain Paths on the Formability of Sheet Metal

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Journal of Materials Science & Technology 2001年第1期17卷 141-142页

作者： Hyunsung Sou Graduate School of Mechanical eng., Kyungpook National University, Korea Youngsuk kim Dept. of Mechanical eng., Kyungpook National University, Korea Graduate Sch. of Mech. eng. Kyungpook Natl. Univ. Kyungpook South Korea

In the press shop of most sheet metals, sheet material undergoes complex strain path and also the formability of the sheet material was limited by the stretchability of the material. Therefore, the precise prediction of path-dependent FLD based on M-K approach using generalization of Hill's 1979 anisotropic yield criterion and introducing a strain gradient effect in the constitutive equation. Also, the theoretically obtained FLD will be compared with experimental data for steel sheets.

关键词： Sheet Metal sheet material strain gradient effect constitutive equation experimental data yield criterion steel sheets strain path

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Selective enriching of trionic emission in a WS2-ZnO hybrid through type-Ⅱ band alignment

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Science China(Information Sciences) 2023年第6期66卷 63-70页

作者： Jin Feng LEONG kim Yong LIM Xiao WU Qinghua XU Chorng Haur SOW eng Tuan POH Department of Physics National University of Singapore Department of Chemistry National University of Singapore

Strategies to modulate the exciton dynamics in ultrathin two-dimensional(2D)semiconductors have always been an integral component in the bid towards improved optoelectronics and quantum photonic devices. The capability to non-destructively tune the relaxation dynamics, valley polarization, binding energies, and population ratio of various excitonic species has been well-sought for advanced *** the rationale design of a WS2-ZnO hybrid platform, we present a distinct increment in the trion-toexciton ratio for WS2emission across a patterned heterostructure. The shift in dominant excitonic species arose due to the efficient charge segregation at the spatially confined interface of the type-Ⅱ *** to the charge transfer process, the resultant emission profile presents up to four times amplification in the trion-to-exciton ratio, with temperature variable trion binding energies up to 59 meV. Since trions possess non-zero charge and spin degrees of freedom, the provision of a higher density of trions with increased binding stability would encourage new opportunities for reproducible optoelectronics and quantum emitters.

关键词： heterostructure trions type-II band alignment

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Fabrication of Meander and Spiral Type Micro Inductors

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Journal of Materials Science & Technology 2000年第2期16卷 236-237页

作者： T.S. Yoont, W.S. Cio and C. O.kim (Division of Material eng., Chungnam Nail. Unly., Taejon 305-764, Korea) H. w. hag (Dept. of Electronic Communication, Juseong College, Chungbuk 363-794, Korea) Y.H.kim (Dept. of Electrical eng., Pukyong Nail. Unly., Pusan, 608-737, Korea) Division of Material eng. Chungnam Natl. Univ. Taejon 305-764 South Korea Dept. of Electronic Communication Juseong College Chungbuk 363-794 South Korea Dept. of Electrical eng. Pukyong Natl. Univ. Pusan 608-737 South Korea

To obtain microstructure of magnetic devices, the thin film inductors were fabricated by the process such as thin film manufacturing, photolithography and wet etching. The frequency characteristics of these devices are measured at high frequency range. When the inductor sizes of the spiral and the meander type are same, the inductance and the quality factor of the spiral type inductor are larger than those of the meander type inductor, but the driving frequency of the spiral type inductor is lower than that of the meander type inductor.

关键词： In Fabrication of Meander and Spiral Type Micro Inductors

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Mini-review on river eutrophication and bottom improvement techniques, with special emphasis on the Nakdong River

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Journal of Environmental Sciences 2015年第4期27卷 113-121页

作者： Andinet Tekile Ilho kim Jisung kim Department of Construction Environment engineering University of Science & Technology Korea Institute of Civil eng. and Building Technology

Water quality in rivers is vital to humans and to maintenance of biotic and ecological *** the Four Major Rivers restoration of South Korea, remarkable attempts have been made to decrease external nutrient loads and moveable weirs were designed to discharge silt that may deposit in pools. However, recently eutrophication of the Nakdong River, which was limited to the lower reaches, is seen to be spreading upstream. The reduction of external nutrient loads to rivers is a long-term goal that is unlikely to lead to reductions in algal blooms for many years because of the time required to implement effective land management strategies. It would therefore be desirable to implement complementary strategies. Regulating the amount of water released is effective at preventing algae blooms in weir pools; so, the relationship between discharge, stratification and bloom formation should be understood in this regard. However, pollutants are likely to accumulate in the riverbed upstream from release points. Thus, to control phosphorus levels, total phosphorus density should be lowered by applying in-river techniques as well. As many ecosystem properties are controlled by multiple processes, simultaneous river bottom improvement techniques, such as combined dissolved oxygen supply and nutrient inactivation, are likely to be effective. The purpose of this review is to present a series of technological approaches that can be used to improve the river bottom area and hence sediment nutrient release, and to illustrate the application of these techniques to the Nakdong River.

关键词： Eutrophication Internal load Nakdong Phosphorus River bottom

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对称和非对称型摩擦耗能连接的抗震性能与设计方法研究现状

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工程力学 2021年第5期38卷 22-37,49页

作者： kim eng Chouery 樊奎贾良玖同济大学结构防灾减灾工程系上海200092

该文综述了对称和非对称型摩擦耗能连接40多年以来的发展历史和研究现状。摩擦耗能连接可用于结构的减震耗能,通过合理设计可实现地震作用下带摩擦耗能连接结构的低损伤,提高结构的韧性。研发滞回性能稳定、重复性好的摩擦耗能连接是相... 详细信息

该文综述了对称和非对称型摩擦耗能连接40多年以来的发展历史和研究现状。摩擦耗能连接可用于结构的减震耗能,通过合理设计可实现地震作用下带摩擦耗能连接结构的低损伤,提高结构的韧性。研发滞回性能稳定、重复性好的摩擦耗能连接是相关研究的主要目标之一。该文从微观和宏观两个方面介绍了金属滑移面之间的摩擦磨损机理,从摩擦磨损的角度讨论了不同摩擦片材料对摩擦连接减震性能的影响。描述了螺栓预紧力大小对摩擦连接减震性能的影响,也总结了摩擦连接的抗腐蚀和抗火性能。阐述了摩擦耗能连接在钢结构支撑、梁柱节点和柱脚节点的应用,并介绍了相关节点的设计方法。对此类连接的关键技术进行了总结,并对该技术的后续研究进行了展望。

关键词：对称型摩擦耗能连接非对称型摩擦耗能连接滑移机理有效摩擦系数预拉力设计方法

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Computing the User Experience via Big Data Analysis:A Case of Uber Services

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Computers, Materials & Continua 2021年第6期67卷 2819-2829页

作者： Jang Hyun kim Dongyan Nan Yerin kim Hyung Park Min Department of Interaction Science/Department of Human-Artificial Intelligence Interaction Sungkyunkwan UniversitySeoul03063Korea Department of Applied Artificial Intelligence/Department of Human-Artificial Intelligence Interaction Sungkyunkwan UniversitySeoul03063Korea

As of 2020,the issue of user satisfaction has generated a significant amount of ***,we employ a big data approach for exploring user satisfaction among Uber *** develop a research model of user satisfaction by expanding the list of user experience(UX)elements(i.e.,pragmatic,expectation confirmation,hedonic,and burden)by including more elements,namely:risk,cost,promotion,anxiety,sadness,and ***,we collect 125,768 comments from online reviews of Uber services and perform a sentiment analysis to extract the UX *** results of a regression analysis reveal the following:hedonic,promotion,and pragmatic significantly and positively affect user satisfaction,while burden,cost,and risk have a substantial negative ***,the influence of expectation confirmation on user satisfaction is not ***,sadness,anxiety,and anger are positively related to the perceived risk of *** with sadness and anxiety,anger has a more important role in increasing the perceived burden of *** on these findings,we also provide some theoretical implications for future UX literature and some core suggestions related to establishing strategies for Uber and similar *** proposed big data approach may be utilized in other UX studies in the future.

关键词： User satisfaction user experience big data sentiment analysis Uber

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