0000000000689984

AUTHOR

Kun Yang

showing 4 related works from this author

Time-Frequency Characteristics of In-Home Radio Channels Influenced by Activities of the Home Occupant

2019

While aging is a serious global concern, in-home healthcare monitoring solutions are limited to context-aware systems and wearable sensors, which may easily be forgotten or ignored for privacy and comfort reasons. An emerging non-wearable fall detection approach is based on processing radio waves reflected off the body, who has no active interaction with the system. This paper reports on an indoor radio channel measurement campaign at 5.9 GHz, which has been conducted to study the impact of fall incidents and some daily life activities on the temporal and spectral properties of the indoor channel under both line-of-sight (LOS) and obstructed-LOS (OLOS) propagation conditions. The time-frequ…

device-free fall detectionComputer scienceReal-time computingWearable computerVDP::Information and communication science: 42002 engineering and technologylcsh:Chemical technology01 natural sciencesBiochemistryArticleAnalytical ChemistryDoppler power spectral density0202 electrical engineering electronic engineering information engineeringlcsh:TP1-1185Electrical and Electronic EngineeringInstrumentationnon-stationary radio channels010401 analytical chemistry020206 networking & telecommunicationsAtomic and Molecular Physics and Optics0104 chemical sciencesTime–frequency analysisspectrogram analysisVDP::Informasjons- og kommunikasjonsvitenskap: 420Radio waveCommunication channelambient-assisted livingSensors (Basel, Switzerland)
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An Exact Solution for the Level-Crossing Rate of Shadow Fading Processes Modelled by Using the Sum-of-Sinusoids Principle

2008

Published version of an article in the journal: Wireless Personal Communications. The original publication is available at Springerlink. http://dx.doi.org/10.1007/s11277-008-9512-3 The focus of this paper is on the higher order statistics of spatial simulation models for shadowing processes. Such processes are generally assumed to follow the lognormal distribution. The proposed spatial simulation model is derived from a non-realizable lognormal reference model with given correlation properties by using Rice's sum-of-sinusoids. Both exact and approximate expressions are presented for the level-crossing rate (LCR) and the average duration of fades (ADF) of the simulation model. It is pointed …

VDP::Mathematics and natural science: 400::Information and communication science: 420::Communication and distributed systems: 423Spatial correlationComputer scienceEmphasis (telecommunications)Higher-order statisticsLevel crossingShadow fadingComputer Science ApplicationsExact solutions in general relativityVDP::Technology: 500::Information and communication technology: 550::Telecommunication: 552Log-normal distributionStatisticsApplied mathematicsElectrical and Electronic EngineeringFocus (optics)Wireless Personal Communications
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SARS-CoV-2 infection and venous thromboembolism after surgery: an international prospective cohort study

2021

SARS-CoV-2 has been associated with an increased rate of venous thromboembolism in critically ill patients. Since surgical patients are already at higher risk of venous thromboembolism than general populations, this study aimed to determine if patients with peri-operative or prior SARS-CoV-2 were at further increased risk of venous thromboembolism. We conducted a planned sub-study and analysis from an international, multicentre, prospective cohort study of elective and emergency patients undergoing surgery during October 2020. Patients from all surgical specialties were included. The primary outcome measure was venous thromboembolism (pulmonary embolism or deep vein thrombosis) within 30 da…

Malepulmonary embolismInternationalitySettore MED/18 - CHIRURGIA GENERALEDeep veinVascular damage Radboud Institute for Health Sciences [Radboudumc 16]infectious diseasesCardiovascularSARS‐CoV‐2surgeryCOVID-19 ; SARS-CoV-2 ; deep vein thrombosis ; pulmonary embolism ; venous thromboembolismCohort StudiesPostoperative ComplicationsAnesthesiologyMedicine and Health SciencesProspective Studies610 Medicine & healthProspective cohort studyLung11 Medical and Health SciencesConfoundingHematologyMiddle AgedThrombosis17 Psychology and Cognitive SciencesCOVID-19; deep vein thrombosis; pulmonary embolism; SARS-CoV-2; venous thromboembolismPulmonary embolismCOVID-19; SARS-CoV-2; deep vein thrombosis; pulmonary embolism; venous thromboembolism.medicine.anatomical_structureCohortCOVID-19/complicationsPostoperative Complications/etiologyOriginal ArticleFemalePatient SafetyLife Sciences & BiomedicineCOVID-19; SARS-CoV-2; deep vein thrombosis; pulmonary embolism; venous thromboembolismHumanAdultmedicine.medical_specialtyAdolescentClinical Sciencesvenous thromboembolism610 Medicine & healthGlobalSurg CollaborativeVenous Thromboembolism/etiologydeep vein thrombosisNOCOVIDSurg CollaborativeYoung AdultMedicine General & InternalAge DistributionClinical ResearchCOVID‐19General & Internal MedicinemedicineHumansSex DistributionAgedScience & Technologybusiness.industrySARS-CoV-2PreventionNeurosciencesdeep vein thrombosiCOVID-19PneumoniaOdds ratioOriginal Articlesmedicine.diseaseSurgeryReconstructive and regenerative medicine Radboud Institute for Health Sciences [Radboudumc 10]Prospective StudieGood Health and Well BeingAnesthesiology and Pain MedicineHuman medicinePostoperative ComplicationCohort StudiebusinessVenous thromboembolism[SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
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Performance Analysis of Super-Orthogonal Space-Time Trellis Coded MIMO-OFDM Systems over the One-Ring Channel

2007

Masteroppgave i informasjons- og kommunikasjonsteknologi 2007 – Høgskolen i Agder, Grimstad With the rapid development of wireless communications, the available bandwidth for wireless applications becomes more and more insufficient. Therefore, how to improve data rate without expending bandwidth becomes a main goal in modern communication system design. Recently, two wireless communication schemes, which can be used to effectively combat with multi-path fading, are widely investigated around the world. One is the multiple-input multiple-output (MIMO) technology and another is the orthogonal frequency division multiplexing (OFDM). As a result, a combined system, MIMO-OFDM, can be used for wi…

IKT590VDP::Technology: 500::Information and communication technology: 550::Telecommunication: 552
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