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  • Bücher  (1.469)
  • T1-995  (1.085)
  • COVID-19  (384)
  • KIT Scientific Publishing  (739)
  • MDPI - Multidisciplinary Digital Publishing Institute  (724)
  • Firenze University Press  (6)
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  • Bücher  (1.469)
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  • 11
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    MDPI - Multidisciplinary Digital Publishing Institute
    Publikationsdatum: 2024-04-11
    Beschreibung: Non-Newtonian (non-linear) fluids are common in nature, for example, in mud and honey, but also in many chemical, biological, food, pharmaceutical, and personal care processing industries. This Special Issue of Fluids is dedicated to the recent advances in the mathematical and physical modeling of non-linear fluids with industrial applications, especially those concerned with CFD studies. These fluids include traditional non-Newtonian fluid models, electro- or magneto-rheological fluids, granular materials, slurries, drilling fluids, polymers, blood and other biofluids, mixtures of fluids and particles, etc.
    Schlagwort(e): TA1-2040 ; T1-995 ; Poiseuille–Couette flow ; membrane ; viscous fluid ; channel flow ; existence theorem ; yield stress ; hemoglobe capacitor ; creeping flows ; viscoplastic fluids ; projection method ; power-law fluid ; first- and second-order slip ; Mittag–Leffler ; lubrication ; viscoplastic fluid ; rupture ; convection ; Re numbers ; enhanced oil recovery (EOR) ; SPH-FEM ; Gamma densitometer ; oil recovery ; non-newtonian fluids ; marginal function ; particle interaction ; computational fluid dynamics ; non-isothermal flows ; suspensions ; Brinkman equation ; lubrication approximation (76A05 ; lid-driven cavity ; smoothed particle hydrodynamics (SPH) ; 76D08 ; Phan-Thien–Tanner (PTT) model ; bubble suspension ; porous media ; non-equilibrium thermodynamics ; porous medium ; suspension viscosity ; hemoglobin ; convection-diffusion ; slug translational velocity ; closure relationship ; non-linear fluids ; wormlike micellar solutions (WMS) ; high viscosity oil ; viscoelastic surfactants (VES) ; 76A20) ; meshless ; Bingham fluid ; Reynolds equation ; generalised simplified PTT ; dense suspension ; chemical EOR (cEOR) ; buoyancy force ; viscosity ratio ; aspect ratio ; rheology ; lubrication approximation ; fluid-solid interaction (FSI) ; optimal control ; natural convection ; biofluids ; shear-dependent viscosity ; thermodynamic capacitor ; shear-thinning ; stokesian dynamics ; weak solution ; biological capacitor ; cement ; variable viscosity ; Couette flow ; pressure boundary conditions ; inhomogeneous fluids ; boundary control ; similarity transformation ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
    Sprache: Englisch
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  • 12
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    MDPI - Multidisciplinary Digital Publishing Institute
    Publikationsdatum: 2024-04-11
    Beschreibung: The development of solid state gas sensors based on microtransducers and nanostructured sensing materials is the key point in the design of portable measurement systems able to reach sensing and identification performance comparable with analytical ones. In such a context several efforts must be spent of course in the development of the sensing material, but also in the choice of the transducer mechanism and its structure, in the electrical characterization of the performance and in the design of suitable measurement setups. This call for papers invites researchers worldwide to report about their novel results on the most recent advances and overview in design and measurements for applications in gas sensors, along with their relevant features and technological aspects. Original research papers are welcome (but not limited) on all aspects that focus on the most recent advances in: (i) basic principles and modeling of gas and VOCs sensors; (ii) new gas sensor principles and technologies; (iii) Characterization and measurements methodologies; (iv) transduction and sampling systems; (vi) package optimization; (vi) gas sensor based systems and applications.
    Schlagwort(e): TA1-2040 ; T1-995 ; indium oxide ; n/a ; environmental monitoring ; semiconductor ; gas sensor ; packed gas chromatographic column ; ultrathin carbon layer ; metal-oxide-semiconductor array sensor ; halitosis ; laser ablation ; capacitive micromachined ultrasonic transducers (CMUT) ; LTCC side via ; MEMS ; indirect packaging ; gas sensing ; efficiency ; bad breath ; electrospray ; array optimization ; low temperature co-fired ceramic (LTCC) ; electronic nose ; UV irradiation ; core/shell nanostructure ; combinatorial and high-throughput technique ; sensitive material ; hydrogen sulfide ; CO detection ; ZnO ; amperometric ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology
    Sprache: Englisch
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  • 13
    Publikationsdatum: 2023-12-21
    Beschreibung: New methods to generate and analyze motions of humanoid robots are presented and applied to a demonstrator. Reflexes of humans and neural central pattern generators (CPGs) were used as archetype. With leaky Integrate-and-Fire neurons a generic reflex template was designed and put to work for several specialized reflexes. The designed CPGs were used to analyze robotik motion as well as for generation of locomotion patterns on a biped demonstrator.
    Schlagwort(e): T1-995 ; Reflexe ; Humanoider Roboter ; Zentrale MustergeneratorenHumanoid Robot ; CentralPatternGenerator ; Reflexes ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Sprache: Deutsch
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  • 14
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    MDPI - Multidisciplinary Digital Publishing Institute
    Publikationsdatum: 2023-04-05
    Beschreibung: On 11 March 2020, the World Health Organization declared COVID-19 a global pandemic, and the disease now affects nearly every country and region. Nearly 18 months later, COVID-19, caused by SARS-CoV-2, continues to present significant challenges to health systems, public health, and the economy of countries across both hemispheres. The morbidity and mortality of the infection caused by SARS-CoV-2 has been significant, and various waves of disease outbreaks initially overwhelmed hospitals and clinics in many countries and continue to do so. This influences everyone, and public health countermeasures have been dramatic in terms of their impact on employment, social systems, and mental health. This Special Issue collection follows on from the Special Issue “COVID-19: Current Challenges and Future Perspectives” and provides an avenue for authors from various disciplines to provide feedback on the response to and our future global preparedness for COVID-19, as well as to disseminate critical information about SARS-CoV-2 and the associated COVID-19 pandemic.
    Schlagwort(e): COVID-19 ; new-onset DM ; severe infection ; mortality ; outbreak ; P.1 variant ; Gamma variant ; SARS-CoV-2 infection ; whole-genome sequencing ; pandemic ; overweight ; obesity ; Peru ; psychological impacts ; public health ; preparedness ; mRNA-1273 ; BNT162b2 ; TAK-919 ; SARS-CoV-2 ; post-vaccination ; healthcare personnel ; vaccination ; asymptomatic infection ; HIV ; infectious disease ; excess mortality ; regdanvimab ; remdesivir ; severe ; community transmission ; population density gradient ; Dhaka ; Bangladesh ; dengue ; undifferentiated febrile illness ; antigen testing ; variants ; reinfections ; breakthrough infections ; vaccine hesitancy ; sub-Saharan Africa ; pulmonary fibrosis ; postacute COVID-19 syndrome ; tuberculosis ; helminth coinfection ; coronavirus ; coordination ; health operations and technical expertise ; AFRO ; diarrhea ; liver ; pancreas ; inflammatory bowel diseases ; liver transplantation ; reproduction rate ; phylogenetic analysis ; clade GK ; D614G ; P681R ; cross-reactivity ; haemorrhage ; thrombocytopenia ; thrombosis ; severe acute respiratory syndrome coronavirus 2 (SARS-CoV2) ; molecular diagnostics ; real-time polymerase chain reaction (RT-qPCR) ; economy ; income levels ; waves ; policy ; turning points ; occupational exposure ; risk factors ; personal protective equipment ; SIR model ; socio-behavioral aspects ; interaction distance ; school reopening strategy ; self-medication ; over-the-counter ; medicine use ; Pakistan ; clinical features ; Luanda ; Angola ; socioeconomic status ; risk perception ; risk prevention practices ; qualitative ; n/a ; bic Book Industry Communication::M Medicine ; bic Book Industry Communication::M Medicine::MM Other branches of medicine::MMG Pharmacology
    Sprache: Englisch
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  • 15
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    KIT Scientific Publishing
    Publikationsdatum: 2023-12-21
    Beschreibung: Die vorliegende Arbeit beschäftigt sich mit der Phasengleichgewichts- und Stofftransportcharakteristik vernetzter Polymere, wie sie in Controlled-Release-Anwendungen, der Brennstoffzellen- und Separationstechnologie oder der Sensor-Aktor-Technik zum Einsatz kommen. Dabei werden insbesondere auch Strategien zur quantitativen Bestimmung der relevanten Gleichgewichts- und Transportparameter vorgestellt, welche auf der Kopplung einer spektroskopischen Messmethode und Simulationsrechnungen basieren.
    Schlagwort(e): T1-995 ; Polymermembran ; Stofftransport ; Polyvinylalkohol ; Raman-Spektroskopie ; Phasengleichgewicht ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Sprache: Deutsch
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  • 16
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    MDPI - Multidisciplinary Digital Publishing Institute
    Publikationsdatum: 2024-04-11
    Beschreibung: This Special Issue was intended as a forum to advance research and apply machine-learning and data-mining methods to facilitate the development of modern electric power systems, grids and devices, and smart grids and protection devices, as well as to develop tools for more accurate and efficient power system analysis. Conventional signal processing is no longer adequate to extract all the relevant information from distorted signals through filtering, estimation, and detection to facilitate decision-making and control actions. Machine learning algorithms, optimization techniques and efficient numerical algorithms, distributed signal processing, machine learning, data-mining statistical signal detection, and estimation may help to solve contemporary challenges in modern power systems. The increased use of digital information and control technology can improve the grid’s reliability, security, and efficiency; the dynamic optimization of grid operations; demand response; the incorporation of demand-side resources and integration of energy-efficient resources; distribution automation; and the integration of smart appliances and consumer devices. Signal processing offers the tools needed to convert measurement data to information, and to transform information into actionable intelligence. This Special Issue includes fifteen articles, authored by international research teams from several countries.
    Schlagwort(e): virtual power plant (VPP) ; power quality (PQ) ; global index ; distributed energy resources (DER) ; energy storage systems (ESS) ; power systems ; long-term assessment ; battery energy storage systems (BESS) ; smart grids ; conducted disturbances ; power quality ; supraharmonics ; 2–150 kHz ; Power Line Communications (PLC) ; intentional emission ; non-intentional emission ; mains signalling ; virtual power plant ; data mining ; clustering ; distributed energy resources ; energy storage systems ; short term conditions ; cluster analysis (CA) ; nonlinear loads ; harmonics, cancellation, and attenuation of harmonics ; waveform distortion ; THDi ; low-voltage networks ; optimization techniques ; different batteries ; off-grid microgrid ; integrated renewable energy system ; cluster analysis ; K-means ; agglomerative ; ANFIS ; fuzzy logic ; induction generator ; MPPT ; neural network ; renewable energy ; variable speed WECS ; wind energy conversion system ; wind energy ; frequency estimation ; spectrum interpolation ; power network disturbances ; COVID-19 ; time-varying reproduction number ; social distancing ; load profile ; demographic characteristic ; household energy consumption ; demand-side management ; energy management ; time series ; Hidden Markov Model ; short-term forecast ; sparse signal decomposition ; supervised dictionary learning ; dictionary impulsion ; singular value decomposition ; discrete cosine transform ; discrete Haar transform ; discrete wavelet transform ; transient stability assessment ; home energy management ; binary-coded genetic algorithms ; optimal power scheduling ; demand response ; Data Injection Attack ; machine learning ; critical infrastructure ; smart grid ; water treatment plant ; power system ; n/a ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues::TBX History of engineering and technology ; thema EDItEUR::K Economics, Finance, Business and Management::KN Industry and industrial studies::KNB Energy industries and utilities
    Sprache: Englisch
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  • 17
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    KIT Scientific Publishing
    Publikationsdatum: 2023-12-21
    Beschreibung: In this work, a novel measurement system for the analysis of the gyrotron RF output spectrum was developed. It enables unprecedented time dependent measurements within a large bandwidth, dynamic range and unambiguous RF indication in the entire D-Band (110-170 GHz). Special attention was given to the investigation of parasitic RF oscillations, and the analysis of the interplay of thermal cavity expansion and ionization-based space charge neutralization at the start of long RF pulses.
    Schlagwort(e): T1-995 ; spectrum analysis ; Mikrowellenmesstechnik ; millimeter waves ; Gyrotron ; Spektralanalyse ; Millimeterwellen ; microwave measurement techniques ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Sprache: Englisch
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  • 18
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    KIT Scientific Publishing
    Publikationsdatum: 2024-04-09
    Beschreibung: Das Wiederherstellen der Akkommodationsfähigkeit des Auges bei Presbyopie oder nach Kataraktoperationen stellt derzeit eine der größten Herausforderungen der Augenheilkunde dar. Das Künstliche Akkommodationssystem ermöglicht die dauerhafte Wiederherstellung der Akkommodationsfähigkeit. In der vorliegenden Arbeit wird ein neues Konzept für die bedarfsgerechte Energieversorgung des Künstlichen Akkommodationssystems erstellt.
    Schlagwort(e): T1-995 ; Akkommodationssystem bedarfsgerecht Energieversorgung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Sprache: Deutsch
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  • 19
    Publikationsdatum: 2023-12-21
    Beschreibung: Die Steuerung von künstlichen Gliedmaßen durch Muskel- bzw. Nervensignale oder von virtuellen Tastaturen durch Hirnsignale erfordert eine Schnittstelle, die die menschlichen Wünsche erfasst, interpretiert und dem angeschlossenen System verfügbar macht. Bestehende Systeme zeichnen sich durch eine einfache Bedienbarkeit aus, verfügen jedoch nur über eine eingeschränkte Funktionalität und müssen zudem manuell entworfen werden.In dieser Arbeit wird ein neues Verfahren zum automatischen Entwurf von MMIs vorgestellt und so die Funktionalität bestehender Systeme erweitert.
    Schlagwort(e): T1-995 ; Mensch-Maschine-Schnittstelle ; Diskriminanzfunktion ; Mensch-Maschine-Kommunikation ; Echtzeitverarbeitung ; Entwurfsautomation ; Steuerung ; Lernende Steuerung ; Klassifikation ; Muskelkontraktion ; Systementwurf ; Gehirn-Computer-Schnittstelle ; Echtheit / Merkmal ; Diskriminanzanalyse ; Elektromyographie ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Sprache: Deutsch
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  • 20
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    KIT Scientific Publishing
    Publikationsdatum: 2024-04-09
    Beschreibung: The aim of this work was to identify the patterns that can induce heating around implanted cardiac pacemakers during MRI and to develop strategies to counteract them. Two approaches were taken: computer simulations of the occurring electromagnetic field distributions and in-vitro experiments using phantoms in real MRI devices, both for conventional bore-hole and new open MRI systems. Using the open MRI, the observed heating could be reduced significantly.
    Schlagwort(e): T1-995 ; pacemaker ; MRI ; numerical field calculation ; biomedical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Sprache: Englisch
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