Refine
Year of publication
Document Type
- Article (632) (remove)
Language
- English (632) (remove)
Has Fulltext
- yes (632)
Keywords
- AG-RESY (32)
- PARO (24)
- SKALP (14)
- resonances (8)
- Wannier-Stark systems (7)
- lifetimes (7)
- HANDFLEX (6)
- Quantum mechanics (6)
- motion planning (5)
- quantum mechanics (5)
- industrial robots (4)
- lifetime statistics (4)
- parallel processing (4)
- LOADBAL (3)
- Robotik (3)
- entropy (3)
- localization (3)
- search algorithms (3)
- Benchmark (2)
- Black-Box (2)
- Case-Based Reasoning (2)
- CoMo-Kit (2)
- Dataset (2)
- Dynamics (2)
- FPGA (2)
- HTML (2)
- Hysteresis (2)
- Industrial Robotics (2)
- Java (2)
- Micro milling (2)
- Network Protocols (2)
- Nonlinear Identification (2)
- RODEO (2)
- Requirements/Specifications (2)
- Robotics (2)
- SIMERO (2)
- System Identification (2)
- Tool wear (2)
- cyanobacteria (2)
- dynamical systems (2)
- evolutionary spectrum (2)
- load balancing (2)
- mathematical modeling (2)
- nonlinear diffusion (2)
- on-line algorithms (2)
- parallel algorithms (2)
- path planning (2)
- phase-space (2)
- quantum chaos (2)
- quasienergy (2)
- safe human robot cooperation (2)
- sensor fusion (2)
- sonotrodes (2)
- theorem proving (2)
- 5G (1)
- 90° orientation (1)
- AC-DC-Wannier-Stark systems (1)
- ARM Processor (1)
- AXI4-Stream (1)
- Ad-hoc workflow (1)
- Adaption (1)
- All-ceramic end mills (1)
- All-ceramic micro end mills (1)
- Amplitude-Phase Method (1)
- Anisotropic smoothness classes (1)
- Arf6 (1)
- Arp2/3 (1)
- Arthropods (1)
- Artificial Intelligence (1)
- Assembly (1)
- Assessment (1)
- Atom-Photon-Wechselwirkung (1)
- Aversive traits (1)
- Banach lattice (1)
- Bibliothekskatalog (1)
- Bioengineering (1)
- Biofuel (1)
- Biofuels (1)
- Biopropane (1)
- Boolean networks (1)
- Bose-Einstein-Kondensation (1)
- Breitbandempfänger (1)
- C (1)
- CAQ (1)
- CODET (1)
- COMOKIT (1)
- CWGAN (1)
- Caatinga (1)
- Ceramic tool substrates (1)
- Chain drives (1)
- Classical mechanics (1)
- Classification (1)
- Classification Tasks (1)
- Climate change (1)
- Cloud Computing (1)
- Collision Avoidance (1)
- Computer Science (1)
- Computer supported cooperative work (1)
- Concepts & Principles (1)
- Control (1)
- Corporate Environmental Report (CER) (1)
- Curie temperature (1)
- Cyanobacteria (1)
- Cyphochilus (1)
- D factor (1)
- DOCK (1)
- Dark Factor of Personality (1)
- Dark traits (1)
- Data width converter (1)
- Desert rivers (1)
- Dimensionality reduction (1)
- Direct Sampling Receiver (1)
- Distributed Multimedia Applications (1)
- Downsizing/Upsizing (1)
- Dual-Fuel (1)
- E-Fuel (1)
- EGR (1)
- ELMO (1)
- Eingebettetes System (1)
- Electricity consumption (1)
- Elektrochromes Material (1)
- Embedded System (1)
- Embedded Systems (1)
- Emission (1)
- Emission Reduction (1)
- Emission Reduction Potential (1)
- Energieffizienz (1)
- Energy Efficiency (1)
- Environmental Management System (1)
- Erwachsenenbildung (1)
- Experience Database (1)
- Extensibility (1)
- FDTD (1)
- Fallbasiertes Planen (1)
- Fatigue (1)
- Feature selection (1)
- Ferromagnetism (1)
- Filter-Diagonalization (1)
- Force-Torque (1)
- Fourier filtering (1)
- Fourieroptik (1)
- Fully Variable Valve Train (1)
- GAT-1 (1)
- GAT-3 (1)
- GRAPHICS (1)
- Generative adversarial networks (1)
- Generic Methods (1)
- Global Software Highway (1)
- GlyT1 (1)
- Green Computing (1)
- Green-IT (1)
- Greenland (1)
- HVO (1)
- Hardware (1)
- Hardware-in-the-loop (1)
- Hardy space (1)
- High-Performance Computing (HPC) (1)
- Hippocampus (1)
- Hochleistungsrechnen (1)
- Honesty-Humility (1)
- Hugh circle transformation (1)
- Human health (1)
- Human satisfaction (1)
- Hybrid Electric Vehicle (1)
- Hybridregler (1)
- Hypermedia Document (1)
- INRECA (1)
- Identification (1)
- Inferior colliculus (1)
- Interacting Magnetic Dots and Wires (1)
- Internet (1)
- Inuktitut (1)
- Iterative methods (1)
- Katastrophe (1)
- Katastrophenschutz (1)
- Kognitives Lernen (1)
- Kollisionserkennung (1)
- Komponente <Software> (1)
- Kooperation (1)
- Kraftregelung (1)
- LV network (1)
- Language Constructs (1)
- Lernen (1)
- Linux (1)
- Low-Power (1)
- MEGI (1)
- META-AKAD (1)
- MHEG (1)
- Machine Learning (1)
- Macroinvertebrates (1)
- Manipulation skills (1)
- Mechenical Engine Desgin (1)
- Mena (1)
- Mensch-Roboter-Kooperation (1)
- Milne Equation (1)
- Mn-Si-C alloy films (1)
- Mobile Networks (1)
- Model Predictive Control (1)
- Modellprädiktive Regelung (1)
- Nanopartikel (1)
- Network Slicing (1)
- Network inference (1)
- Neural Adaptive Control (1)
- Neural Networks (1)
- Non-linear wavelet thresholding (1)
- OME (1)
- Object-Relational DataBase Management Systems (ORDBMS) (1)
- Object-Relational Database Systems (1)
- Optimierung (1)
- Optimization (1)
- Ovibos moschatus (1)
- PC-based robot control (1)
- PECS (1)
- PI-Regler (1)
- PMMA (1)
- PT-symmetry (1)
- Parabolic regularization (1)
- Parametric Excitation (1)
- Partial functions (1)
- Photon-Photon-Wechselwirkung (1)
- Photonic structures (1)
- PhySCo (1)
- Physics Education Research (1)
- Physikdidaktik (1)
- Preconditioners (1)
- Prior knowledge (1)
- Pullen Edmonds system (1)
- Quality Improvement Paradigm (QIP) (1)
- Quantum Chaos (1)
- RCGAN (1)
- RCWGAN (1)
- RONAF (1)
- ROS (1)
- Rac (1)
- Rainflow (1)
- Regler (1)
- Reglerentwurf (1)
- Repositories (1)
- Research Methodology (1)
- Resilience (1)
- Reuse (1)
- Robot control (1)
- Robots (1)
- SDL-pattern a (1)
- SDR (1)
- SFB-EB (1)
- SIMD architectures (1)
- SQUID magnetometry (1)
- STEM laboratories (1)
- SWEEPING (1)
- Salinity (1)
- Sandercock-type multipath tandem Fabry-Perot interferometer (1)
- Sauter mean diameter (1)
- Scalar type operator (1)
- Secondary Encoders (1)
- Selbstschutz (1)
- Simulation (1)
- Singularity theory (1)
- Skalierbarkeit (1)
- Smart Grid (1)
- Software Defined Radio (1)
- Software Engineering (1)
- Software development environment (1)
- Software-Defined Radio (1)
- Sparse linear equations (1)
- Stark systems (1)
- State of the Art IT (1)
- Strain-Life Approach (1)
- Streaming (1)
- Structural Adaptation (1)
- Structuring Approach (1)
- Supercomputer (1)
- Synthetic data generation (1)
- System-on-Chip (1)
- Tcl (1)
- Thermal Management of Exhaust Aftertreatment (1)
- Three-layer Web (1)
- Time series data (1)
- TimeGAN (1)
- Tip60 (1)
- Tool development (1)
- Topologie (1)
- Total hip arthroplasty (1)
- Trajectory Planning (1)
- Tropical dry forest (1)
- Ultra small micro end mills (1)
- Undergraduate Students (1)
- Unsupervised learning (1)
- VHCF (1)
- VIROP (1)
- Vector-valued holomorphic function (1)
- Vegetable Oil (1)
- Wannier-Bloch resonance states (1)
- Wannier-Bloch states (1)
- Wannier-Stark ladders (1)
- Wideband (1)
- Wissensrepräsentation (1)
- World Wide Web (1)
- World-Wide Web (1)
- Y-TZP (1)
- Zedboard (1)
- Zivilschutz (1)
- Zynq (1)
- abstract description (1)
- access rights (1)
- active inference (1)
- adaptive estimation (1)
- adolescents (1)
- adult education (1)
- amino acids (1)
- analogical reasoning (1)
- analogy (1)
- anisotropic coupling mechanism (1)
- anisotropy (1)
- antibiotics (1)
- aqueous coating; cyclooxygenase-2; interleukins; reactive oxygen species; single emulsion solvent evaporation; tumor necrosis factor-alpha (1)
- artificial intelligence (1)
- associations (1)
- athletic performance; physical exertion; dietary supplements (1)
- authentication (1)
- autonomous driving (1)
- autonomous systems (1)
- autonomous systems object classification (1)
- back muscles (1)
- basalt fibre reinforced polymer (1)
- bcc-Fe(001) (1)
- belief updating (1)
- benchmark (1)
- bi-directional search (1)
- biofertilizer (1)
- biofilm (1)
- biological soil crusts (1)
- biomechanics (1)
- biomimetics (1)
- biquadratic interlayer coupling (1)
- boundary conditions (1)
- branch-and-bound (1)
- brillouin light scattering (1)
- building simulation (1)
- byte code (1)
- case-based planning (1)
- changepoint test (1)
- chaos (1)
- chaotic dynamics (1)
- child-directed speech (1)
- civil protection (1)
- client/server-architecture (1)
- co-culture (1)
- coatings (friction-reducing) (1)
- coatings (wear-resistant) (1)
- cognitive load (1)
- cold gas-dynamic spray (1)
- collision avoidance (1)
- collision detection (1)
- colorectal carcinogenesis (1)
- combinatorial algorithms (1)
- compartment model (1)
- completeness (1)
- complex energ (1)
- complex energy resonances (1)
- complex phase space (1)
- component-based (1)
- comprehensive reuse (1)
- computer control (1)
- concrete composite structures (1)
- concrete sandwich panels (1)
- condensation (1)
- condensation on structured surfaces (1)
- conservative extension (1)
- consistency (1)
- cortactin (1)
- critical thickness (1)
- cross-correlation (1)
- cyclic indentation tests (1)
- cyclic load (1)
- cyclic pseudopeptides (1)
- cyclopeptides (1)
- data mining (1)
- deadlock (1)
- decay rate (1)
- decentralized heating and cooling systems (1)
- decision-making (1)
- deformable objects (1)
- dependency management (1)
- deposition temperature (1)
- diamond (1)
- differential measurement (1)
- dipole-exchange surface (1)
- disaster (1)
- discrete element method (1)
- discretization (1)
- dislocation arrangements (1)
- display algorithms (1)
- distributed and parallel processing (1)
- distributed computing (1)
- distributed control system (1)
- distributed model predictive control (1)
- distributed processing (1)
- distributedknowledge-based systems (1)
- distribution system (1)
- drainage (1)
- droplet size distribution (1)
- eDNA (1)
- efficiency (1)
- electrochromic device (1)
- epitaxial growth (1)
- exchange-coupled rare-earth (1)
- experience base (1)
- experience management (1)
- explainable artificial intelligence (1)
- fatigue (1)
- fibre-reinforced polymer connectors (1)
- finite element method (1)
- fire resistance (1)
- fire test (1)
- fire wall (1)
- first language acquisition (1)
- flexible workflows (1)
- force control (1)
- force following (1)
- fractals (1)
- frame buffer operations (1)
- frames (1)
- function of bounded variation (1)
- functional data (1)
- functional time series (1)
- governance (1)
- governance; experimental governance; shrinking cities; civic involvement (1)
- graph neural networks (1)
- graph search (1)
- graphic processors (1)
- greases (1)
- grinding wheel (1)
- heme oxygenase-1 (1)
- higher order logic (1)
- human robot cooperation (1)
- hybrid control (1)
- hybrid knowledge representation (1)
- hydrogen embrittlement (1)
- hydrogen enhanced localized plasticity (HELP) (1)
- hypercubes (1)
- idle times (1)
- image enhancement (1)
- image-based probe (1)
- infrared thermography (1)
- inhibitory synaptic transmission (1)
- initial value representation (1)
- inline probe (1)
- integrable systems (1)
- interaction graphs (1)
- interpreter (1)
- iron (1)
- jet loop reactor (1)
- knowledge processing (1)
- kraftbasiertes Führen (1)
- layered magnetic systems (1)
- liquid-liquid (1)
- load sharing (1)
- local communication (1)
- locally stationary process (1)
- loss coefficient (1)
- low voltage grid (1)
- machine learning (1)
- magnetization reversal process (1)
- magneto-optical Kerr effect (1)
- maneuver prediction (1)
- many-valued logic (1)
- mathematical concept (1)
- metastable Pd(001) (1)
- micro-structure analysis (1)
- microdefect (1)
- microgrooved surface (1)
- migration (1)
- minimax rate (1)
- modal analysis (1)
- modelling (1)
- molecular dynamics simulation (1)
- molecular recognition (1)
- momentum distributions (1)
- morphism (1)
- morphological simplification (1)
- motion control (1)
- multi-language (1)
- multi-material-design (1)
- multi-object tracking (1)
- multifluid (1)
- multigrid methods (1)
- multiple robotic manipulators (1)
- multitrait–multimethod analysis (1)
- muscle fatigue (1)
- muscle soreness (1)
- nanoindentation (1)
- nematodes (1)
- neurite outgrowth (1)
- neurodegenerative disease (1)
- nitrogen fixation (1)
- nominalization (1)
- non-Gaussia non-i.i.d. errors (1)
- nonhermitian perturbation theory (1)
- nonlinear diffusion filtering (1)
- nonlinear wavelet thresholding (1)
- nonparametric regression and (spectral) density estimation (1)
- noun incorporation (1)
- numerical computation (1)
- object classification (1)
- off-line programming (1)
- office chair with heating and cooling function (1)
- one-dimensional model (1)
- open dissipative quantum systems (1)
- operations research (1)
- operator splitting (1)
- optical lattices (1)
- optimal rate of convergence (1)
- optimization (1)
- parallelism and concurrency (1)
- particle collision (1)
- patterned magnetic permalloy films (1)
- persistence (1)
- phase space (1)
- phase transformation (1)
- photobioreactor (1)
- photon Bose-Einstein condensate (1)
- photon-photon interaction (1)
- photosynthesis (1)
- physical modelling (1)
- plants (1)
- polysynthesis (1)
- posture (1)
- predictive processing (1)
- problem formulation (1)
- programming by demonstration (1)
- progress feedback (1)
- project coordination (1)
- proof plans (1)
- pyramids (1)
- qauntum mechanis (1)
- quantum tunneling (1)
- rainflow (1)
- random finite sets (1)
- raster graphics (1)
- rating scale (1)
- reactive multiphase flow (1)
- reactive oxygen species (1)
- recurrent neural networks (1)
- regulation (1)
- reinforced concrete (1)
- resolution (1)
- reuse (1)
- reuse repositories (1)
- review (1)
- rings (1)
- robot calibration (1)
- robot control architectures (1)
- robot motion planning (1)
- robotic manipulators (1)
- robotics (1)
- roles (1)
- routine outcome monitoring (1)
- scale-space (1)
- search algorithm (1)
- search alogorithms (1)
- second order logic (1)
- secondary metabolites (1)
- security domain (1)
- seed filling (1)
- self-regulation (1)
- semiclassical (1)
- semiclassical quantisation (1)
- sensitivity analysis (1)
- short-time periodogram (1)
- shortest sequence (1)
- solid-solid phase transition (1)
- sorted logic (1)
- soundness (1)
- spatial optical filtering (1)
- spine (1)
- spinwaves (1)
- split-attention effect (1)
- stability (1)
- static load balancing (1)
- stimulus response data (1)
- strengthening (1)
- structural synaptic plasticity (1)
- structure tensor (1)
- structured permalloy films (1)
- supramolecular chemistry (1)
- surface (1)
- surface protection (1)
- sustainability policies (1)
- synthetic receptors (1)
- tableau (1)
- tactics (1)
- tailored disorder (1)
- temperature dependence (1)
- tensor product basis (1)
- test feeder (1)
- texture (1)
- thermal comfort (1)
- thermal sensation (1)
- thermoelectric movable cooling partition (1)
- time-frequency plan (1)
- tori (1)
- traceability (1)
- training (1)
- trajectory optimization (1)
- transition-metal (1)
- translation (1)
- traveling salesman problem (1)
- triple layer stacks (1)
- trunk muscles (1)
- tundra (1)
- two-dimensional (1)
- typical instance (1)
- ultrasonic processes (1)
- ultrasonic welding (1)
- validity (1)
- variation sets (1)
- vector measure (1)
- virtual building controller (1)
- virtual grinding wheel model (1)
- virtual programming (1)
- wall energy (1)
- wall thickness (1)
- wavelet thresholding (1)
- wear/failure testing devices (1)
- well-posedness (1)
- white beetles (1)
- wine industry (1)
Faculty / Organisational entity
- Kaiserslautern - Fachbereich Maschinenbau und Verfahrenstechnik (148)
- Kaiserslautern - Fachbereich Informatik (107)
- Kaiserslautern - Fachbereich Physik (104)
- Kaiserslautern - Fachbereich Mathematik (65)
- Kaiserslautern - Fachbereich Sozialwissenschaften (47)
- Kaiserslautern - Fachbereich Biologie (46)
- Kaiserslautern - Fachbereich Chemie (43)
- Kaiserslautern - Fachbereich Bauingenieurwesen (24)
- Kaiserslautern - Fachbereich Elektrotechnik und Informationstechnik (21)
- Kaiserslautern - Fachbereich Wirtschaftswissenschaften (13)
- Kaiserslautern - Fachbereich Raum- und Umweltplanung (4)
- Landau - Fachbereich Natur- und Umweltwissenschaften (4)
- Kaiserslautern - Fachbereich ARUBI (2)
- Landau - Fachbereich Psychologie (2)
- Kaiserslautern - Fachbereich Architektur (1)
- Landau - Fachbereich Erziehungswissenschaften (1)
Without actors, there is no action: How interpersonal interactions help to explain routine dynamics
(2020)
In this paper, we argue that it is important to gain a better understanding on how people interact with each other to explain routine dynamics. Thus, we propose to focus on the interpersonal interactions of actors which is not only the fact that actors interact with each other but that the manner and quality of these interactions is important to understand routine dynamics. By drawing on social exchange theory, we propose a framework that seeks to explain routine dynamics based on different relationships between actors. Building on this framework, we provide different process models indicating how routine performing and patterning is enacted due to the respective relationship of actors. Our insights contribute to research on routine dynamics by arguing (1) that actions of patterning are dependent on the relationship of actors; (2) that trust works as an enabler for creating new patterns of actions; (3) that distrust functions as an enhancer for interrupting and dissolving patterns of actions.
Monitoring of patient-reported outcomes and providing therapists with progress feedback has been shown to be beneficial for treatment outcomes (e.g., by preventing therapy failures). Despite recent advances in monitoring and feedback research, little is known about why some therapists benefit from feedback more than others. Addressing this issue, the present article uses the basic science literature on belief updating to propose a theoretical model for these between-therapist differences. In doing so, we provide a novel framework that allows testable hypotheses about when and how feedback on therapy progress is likely to improve treatment outcomes. In particular, we argue that the integration of feedback and its effect on therapists’ behavior depends on the weight therapists assign to their prior beliefs regarding treatment progress relative to the weight of the feedback received. We conclude by outlining some directions for future research on the underpinnings of this model, and point to some implications for the training of therapists and provision of feedback.
Whole-body electromyostimulation (WB-EMS) is an extension of the EMS application known in physical therapy. In WB-EMS, body composition and skinfold thickness seem to play a decisive role in influencing the Ohmic resistance and therefore the maximum intensity tolerance. That is why the therapeutic success of (WB-)EMS may depend on individual anatomical parameters. The aim of the study was to find out whether gender, skinfold thickness and parameters of body composition have an influence on the maximum intensity tolerance in WB-EMS. [Participants and Methods] Fifty-two participants were included in the study. Body composition (body impedance, body fat, fat mass, fat-free mass) and skinfold thicknesses were measured and set into relation to the maximum intensity tolerance. [Results] No relationship between the different anthropometric parameters and the maximum intensity tolerance was detected for both genders. Considering the individual muscle groups, no similarities were found in the results. [Conclusion] Body composition or skinfold thickness do not seem to have any influence on the maximum intensity tolerance in WB-EMS training. For the application in physiotherapy this means that a dosage of the electrical voltage within the scope of a (WB-) EMS application is only possible via the subjective feedback (BORG Scale).
In this paper we present the results of the project “#Datenspende” where during the German election in 2017 more than 4000 people contributed their search results regarding keywords connected to the German election campaign.
Analyzing the donated result lists we prove, that the room for personalization of the search results is very small. Thus the opportunity for the effect mentioned in Eli Pariser’s filter bubble theory to occur in this data is also very small, to a degree that it is negligible. We achieved these results by applying various similarity measures to the result lists that were donated. The first approach using the number of common results as a similarity measure showed that the space for personalization is less than two results out of ten on average when searching for persons and at most four regarding the search for parties. Application of other, more specific measures show that the space is indeed smaller, so that the presence of filter bubbles is not evident.
Moreover this project is also a proof of concept, as it enables society to permanently monitor a search engine’s degree of personalization for any desired search terms. The general design can also be transferred to intermediaries, if appropriate APIs restrict selective access to contents relevant to the study in order to establish a similar degree of trustworthiness.
Surface wetting can be simulated using a phase field approach which describes the continuous liquid-gas transition with the help of an order parameter. In this publication, wetting of non-planar surfaces is investigated based on a phase field model by Diewald et al. [1, 2]. Different scenarios of droplets on rough surfaces are simulated. The static equilibrium for those scenarios is calculated using an Allen-Cahn evolution equation. The influence of the surface morphology on the resulting contact angle is investigated while the width of the phase transition from liquid to gas is varied as a model parameter.
Wear phenomena in worm gears are dependent on the size of the gears. Whereas larger gears are mainly affected by fatigue wear, abrasive wear is predominant in smaller gears. In this context a simulation model for abrasive wear of worm gears was developed, which is based on an energetic wear equation. This approach associates wear with solid friction energy occurring in the tooth contact. The physically-based wear simulation model includes a tooth contact analysis and tribological calculation to determine the local solid tooth friction and wear. The calculation is iterated with the modified tooth flank geometry of the worn worm wheel, in order to consider the influence of wear on the tooth contact. Experimental results on worm gears are used to determine the wear model parameter and to validate the model. A simulative study for a wide range of worm gear geometries was conducted to investigate the influence of geometry and operating conditions on abrasive wear.
With this article we first like to give a brief review on wavelet thresholding methods in non-Gaussian and non-i.i.d. situations, respectively. Many of these applications are based on Gaussian approximations of the empirical coefficients. For regression and density estimation with independent observations, we establish joint asymptotic normality of the empirical coefficients by means of strong approximations. Then we describe how one can prove asymptotic normality under mixing conditions on the observations by cumulant techniques.; In the second part, we apply these non-linear adaptive shrinking schemes to spectral estimation problems for both a stationary and a non-stationary time series setup. For the latter one, in a model of Dahlhaus on the evolutionary spectrum of a locally stationary time series, we present two different approaches. Moreover, we show that in classes of anisotropic function spaces an appropriately chosen wavelet basis automatically adapts to possibly different degrees of regularity for the different directions. The resulting fully-adaptive spectral estimator attains the rate that is optimal in the idealized Gaussian white noise model up to a logarithmic factor.
We derive minimax rates for estimation in anisotropic smoothness classes. This rate is attained by a coordinatewise thresholded wavelet estimator based on a tensor product basis with separate scale parameter for every dimension. It is shown that this basis is superior to its one-scale multiresolution analog, if different degrees of smoothness in different directions are present.; As an important application we introduce a new adaptive wavelet estimator of the time-dependent spectrum of a locally stationary time series. Using this model which was resently developed by Dahlhaus, we show that the resulting estimator attains nearly the rate, which is optimal in Gaussian white noise, simultaneously over a wide range of smoothness classes. Moreover, by our new approach we overcome the difficulty of how to choose the right amount of smoothing, i.e. how to adapt to the appropriate resolution, for reconstructing the local structure of the evolutionary spectrum in the time-frequency plane.
We consider wavelet estimation of the time-dependent (evolutionary) power spectrum of a locally stationary time series. Allowing for departures from stationary proves useful for modelling, e.g., transient phenomena, quasi-oscillating behaviour or spectrum modulation. In our work wavelets are used to provide an adaptive local smoothing of a short-time periodogram in the time-freqeuncy plane. For this, in contrast to classical nonparametric (linear) approaches we use nonlinear thresholding of the empirical wavelet coefficients of the evolutionary spectrum. We show how these techniques allow for both adaptively reconstructing the local structure in the time-frequency plane and for denoising the resulting estimates. To this end a threshold choice is derived which is motivated by minimax properties w.r.t. the integrated mean squared error. Our approach is based on a 2-d orthogonal wavelet transform modified by using a cardinal Lagrange interpolation function on the finest scale. As an example, we apply our procedure to a time-varying spectrum motivated from mobile radio propagation.
River ecosystems are being threatened by rising temperatures, aridity, and salinity due to climate change and increased water abstractions. These threats also put human well-being at risk, as people and rivers are closely connected, particularly in water-scarce regions. We aimed to investigate the relationship between human well-being and biological and physico-chemical river water quality using the arid Draa River basin as a case study. Physico-chemical water measurements, biological monitoring of aquatic macroinvertebrates, and household surveys were used to assess the state of the river water, ecosystem, and human well-being, as well as the associations between them. Salinity levels exceeded maximum permissible values for drinking water in 35 % and irrigation water in 12 % of the sites. Salinity and low flow were associated with low biological quality. Human satisfaction with water quantity and quality, agriculture, the natural environment, and overall life satisfaction were low particularly in the Middle Draa, where 89% of respondents reported emotional distress due to water salinity and scarcity. Drinking and irrigation water quality was generally rated lower in areas characterized by higher levels of water salinity and scarcity. The study found positive associations between the river water quality and biological quality indices, but no significant association between these factors and human satisfaction. These findings suggest that the relationship between human satisfaction and the biological and physicochemical river water quality is complex and that a more comprehensive approach to human well-being is likely needed to establish relationships.