A5059793357- Orbital Angular Momentum in Optics
- Stress Responses and Cortisol
- Micro and Nano Robotics
- Laser Material Processing Techniques
- Modular Robots and Swarm Intelligence
- Tryptophan and brain disorders
- Heart Rate Variability and Autonomic Control
- Advanced Fluorescence Microscopy Techniques
- Magnetic confinement fusion research
- Neuroendocrine regulation and behavior
- Laser-induced spectroscopy and plasma
- Molecular Communication and Nanonetworks
- Chalcogenide Semiconductor Thin Films
- EEG and Brain-Computer Interfaces
- Airway Management and Intubation Techniques
- Optical Coherence Tomography Applications
- Microfluidic and Bio-sensing Technologies
- Surface Roughness and Optical Measurements
- Near-Field Optical Microscopy
- Adipose Tissue and Metabolism
- Force Microscopy Techniques and Applications
- Non-Invasive Vital Sign Monitoring
- Plasma Diagnostics and Applications
- Spectroscopy and Laser Applications
- Robotic Locomotion and Control
University of Szeged
2007-2025
HUN-REN Szegedi Biológiai Kutatóközpont
2013-2025
Institute of Biophysics
2012-2025
HUN-REN Wigner Research Centre for Physics
2019
Hungarian Academy of Sciences
2012-2019
Hydrodynamic synchronization is a fundamental physical phenomenon by which self-sustained oscillators communicate through perturbations in the surrounding fluid and converge to stable synchronized state. This an important factor for emergence of regular coordinated patterns motions cilia flagella. When dealing with biological systems, however, it always hard disentangle internal signaling mechanisms from external purely couplings. We have used combination two-photon polymerization...
We introduce a system of light driven microscopic autonomous moving particles that move on flat surface. The design is simple, yet effective: Micrometer sized objects with wedge shape are produced by photopolymerization, they covered reflective When the area motion illuminated perpendicularly from above, deflected to side shaped objects, in direction determined position and orientation particles. momentum change during reflection provides driving force for an effectively motion. efficient...
Background/Objectives: For the rapid, objective characterization of physiological stress response, there is currently no generally recognized standard. The measurement methods used in practice (e.g., for psychological measures stress) are often subjective, or case biological markers cortisol, amylase), they usually require a blood test. this reason, use heart rate variability (HRV) to characterize has recently come fore. HRV length heartbeat intervals, which indicates ability respond various...
Background/Objectives: Ghrelin and growth hormone-releasing peptide 6 (GHRP-6) are peptides which can stimulate GH release, acting through the same receptor. its receptor have been involved in reward sensation addiction induced by natural artificial drugs, including nicotine. The present study aimed to investigate impacts of ghrelin GHRP-6 on horizontal vertical activity rats exposed chronic nicotine treatment followed acute withdrawal. Methods: Male female Wistar were daily intraperitoneal...
We demonstrate that laser pulses of nanosecond duration ($\ensuremath{\lambda}=1064$ nm, $\ensuremath{\tau}=25$ ns, PRR $=5$ kHz) are capable the clean removal CuInGaSe${}_{2}$ (CIGS) and ZnO:Al layers in layer structure chalcogenide-based solar cells, leaving underlying Mo undamaged producing excellent crater morphology. Our results prove material process is governed by thermomechanical stress developing CIGS due to rapid heating. In mechanical ablation active layer, three phenomena play a...
Heart-rate variability (HRV), measured by the fluctuation of beat-to-beat intervals, has been growingly considered most important hallmark heart rate (HR) time series. The HRV can be characterized various statistical measures both in and frequency domains, or nonlinear methods. During past decades, an overwhelming amount data piled up research community, but individual results are difficult to reconcile due different measuring conditions usually HR-dependent HRV-parameters applied. Moreover,...
Novel imaging techniques utilizing nondegenerate, correlated photon pairs sparked intense interest during the last couple of years among scientists quantum optics community and beyond. It is a key property such "ghost imaging" or "quantum interference" methods that they use those photons for never interacted with sample, allowing detection in spectral range different from illumination object. Extensive applications these spectroscopy microscopy are envisioned, however, their limited spatial...
Fluorescent observation of cells generally suffers from the limited axial resolution due to elongated point spread function microscope optics. Consequently, three-dimensional imaging results in that is several times worse than transversal. The optical solutions this problem usually require complicated optics and extreme spatial stability. A straightforward way eliminate anisotropic fuse images recorded multiple viewing directions achieved mostly by mechanical rotation entire sample. In...
Recently the Lithium-Beam Emission Spectroscopy (Li-BES) system on COMPASS has reached its full diagnostic power in terms of routine automatic operation any kind plasma scenarios and it is normally used as a standard tool for reconstruction ultra fast density profiles edge region plasmas. The purpose this study to investigate advantages limitations Li-BES characterizing electron fluctuations. We show how atomic physics plasma-beam interactions can affect interpretation measurement at...
The scrape off layer (SOL) plasma in a Tokamak device and its coupling with the edge dictate performance of discharge to high degree—especially as all has go through SOL, which is main exhaust channel for hot plasma. This contribution provides an introduction modelling efforts dynamics SOL regions. We employ fully dynamical fluid model, HESEL code. equipped synthetic diagnostic tools probe arrays, Li-beam spectroscopy, Gas Puff Imaging. Using arrays measure electron ion heat advection...
We demonstrate the use of microfabricated supporting structures for maneuvering and polystyrene microspheres as magnifying lenses in imaging applications. The structure isolates trapping light from magnifier, hence avoiding direct radiation to sample being observed which could be damaging, especially biological specimens. Using an optical setup, we actuation a microsphere not held by traps, show possibility through such microspheres.
In this paper, we present a comprehensive study on the potentials and limitations of high repetition rate pulsed laser deposition (PLD), using diode-pumped solid state (DPSS) Nd : YAG laser, operated at 532 nm. Titanium oxide thin films were deposited 5 Pa oxygen silicon substrates with different number pulses, typically several tens millions, pulse rates (PRR) between 10 30 kHz, while keeping energy constant value. The lateral variation thickness, void content optical parameters along radii...
The aim of the present study was to determine effects alcohol intoxication and withdrawal on hypothalamic neurohormones such as corticotropin-releasing factor (CRF) arginine vasopressin (AVP), extrahypothalamic neurotransmitters striatal dopamine (DA), amygdalar gamma aminobutyric acid (GABA), hippocampal glutamate (GLU). In addition, participation two CRF receptors, CRF1 CRF2, investigated. For this purpose, male Wistar rats were exposed repeated intraperitoneal (ip) administration every 12...
Optical micro manipulation of live cells has been extensively used to study a wide range cellular phenomena with relevance in basic research or diagnostics. The approaches span from many for high throughput measurement sorting, more elaborated studies intracellular events on trapped single when coupled modern imaging techniques. In case direct cell trapping the damaging effects light-cell interaction must be minimized, instance choice proper laser wavelength. Microbeads have already...
Unlike an equilibrium gas, the distribution of active particles can be very sensitive to what happens at boundaries their container. Experiments and simulations have previously highlighted possibility exploiting this behavior for geometric control particles, although a general theoretical framework is lacking. Here we propose boundary method based on flux transfer formalism typical radiometry problems, where surface elements transmit receive "rays" with infinite persistence length. As in...
We have studied the conditions of rotation induced by collimated light carrying no angular momentum. Objects different shapes and optical properties were examined in nontrivial case where axis is perpendicular to direction propagation. This geometry offers important advantages for application as it fundamentally broadens possible practical arrangements be realised. found that cannot drive permanent 2D or prism-like 3D objects (i.e. fixed cross-sectional profile along axis) fully reflective...
Background: Spontaneous ventilation is considered the most physiological anaesthesia method in thoracic surgery; however, this procedure controversial because of potential risk an unsafe airway. We conducted a retrospective, monocentric, interventional cohort study, which was pilot evaluation Ventilation using double-lumen tube Intubation (SVI) technique for video-assisted surgery (VATS) thymectomy. Methods: Fifteen patients underwent SVI VATS thymectomy two groups: myasthenia gravis (MG)...
Al doped ZnO (ZAO) films are widely used as transparent contacts of thin film solar cells. Having a reliable and reproducible laser cutting technology is critical for the cell device manufacturing. Cutting experiments were carried out in wide range parameters (1-25cm/s speed, 1-10kHz pulse frequency 200-5800mW power) but energy was kept narrow range. Optical microscopy cuts revealed that there power full ablation layer. A parameter optimal function layer thickness established. Ellipsometry...