A5063161060- Radio Frequency Integrated Circuit Design
- Advanced Power Amplifier Design
- Wireless Body Area Networks
- Energy Harvesting in Wireless Networks
- Microwave Engineering and Waveguides
- Analog and Mixed-Signal Circuit Design
- Molecular Communication and Nanonetworks
- Insect and Arachnid Ecology and Behavior
- Advancements in PLL and VCO Technologies
- Plant and animal studies
- Antenna Design and Analysis
- Synthesis and characterization of novel inorganic/organometallic compounds
- Advanced MIMO Systems Optimization
- Retinal Imaging and Analysis
- Acoustic Wave Resonator Technologies
- Glaucoma and retinal disorders
- Cryospheric studies and observations
- Full-Duplex Wireless Communications
- Indoor and Outdoor Localization Technologies
- Advanced biosensing and bioanalysis techniques
- Organometallic Complex Synthesis and Catalysis
- Wireless Power Transfer Systems
- Biblical Studies and Interpretation
- Microwave and Dielectric Measurement Techniques
- Arctic and Antarctic ice dynamics
Friedrich-Alexander-Universität Erlangen-Nürnberg
2016-2025
University College London
2024
University of Duisburg-Essen
2024
Deutsche Forschungsgemeinschaft
2024
Conference Board
2024
Tokyo Institute of Technology
2024
Okinawa Institute of Science and Technology Graduate University
2015-2023
Statistics Austria
2013-2023
United States Army Combat Capabilities Development Command
2022-2023
United States Army
2023
A Debye relaxation model for the permittivity of aqueous glucose solution is given up to 40 GHz. Measurements solutions are compared with invasive measurements on over blood samples. Reflection- and transmission-based techniques explained, concerning application in biomedical concentration measurements. Wideband different sensing structures introduced. sensors applied a six-port reflectometer, as well homodyne vector network analyzer.
Abstract The disilyne R**Si≡SiR** (R** = SiMe(Si t Bu 3 ) 2 ), prepared as the first isolable and realtively stable silicon compound with a SiSi triple bond two years ago by dehalogenation of trans ‐R**ClSi=SiClR** LiC 10 H 8 in thf at ‐78 °C (calc.: Si≡Si distance 2.072Å, Si‐Si≡Si angle 148°), forms CH =CH [2+2] =CH‐CH=CH [2+4] cycloadduct. ethene adduct takes up oxygen very easily change Si=Si group into SiOSiO ring formation R**Si(μ‐O)(μ‐O)(μ‐C 4 )SiR**. By heating heptane to ca. 50...
The contrast mechanisms used for photoacoustic tomography (PAT) and fluorescence imaging differ in subtle, but significant, ways. design of agents each or both modalities requires an understanding the spectral characteristics as well intra- intermolecular interactions that occur during formulation. We found quenching occurs formulation near-infrared (NIR) fluorescent dyes nanoparticles results enhanced PAT. ability new PAT method to utilize strongly absorbing chromophores signal generation...
NIRly there: The chromophore of compounds with intramolecular H bonds have been rigidified by substitution the protons NH⋅⋅⋅N bridges BR2 groups (R=F, Ph). This stiffening and polymethine character chromophores affords dyes intense fluorescence at room temperature high NIR absorption, but virtually no absorption in visible range (see picture for an example, —: ••••: fluorescence). Our research activities over last few decades concerned correlations between molecular structure...
Aortic collagen and elastin were quantitated in three groups of castrated two noncastrated male rats treated by intramuscular injection for 3 wk with oil, testosterone, or estradiol. The greatest differences found between the receiving testosterone those estradiol, estradiol-treated having significantly lower total collagen, percent elastin, collagen/elastin (C/E), higher than testosterone. In rats, administration estradiol resulted C/E. Systolic blood pressure was highest testerone lowest...
Very invisible: Bis(pyrrolopyrrole) cyanines are extended chromophores based on diketopyrrolopyrroles (general structure shown). The compounds characterized by extremely high extinction coefficients, narrowband absorption in the near-IR range, and strong fluorescence around 1 μm. Since visible region is negligible, they approach ideal of selective NIR absorbers.
Pyrrolopyrrole cyanine (PPCy) dyes are presented as a novel class of near-infrared (NIR) chromophores, which synthesized in condensation reaction diketopyrrolopyrrole with heteroarylacetonitrile compounds. Their optical properties marked by strong and narrow-band NIR absorptions. Complexation products BF(2) BPh(2) show fluorescence hardly any absorption the visible range. We series new PPCys that differ only heterocyclic peripheral groups chromophore. With this strategy, spectra can be tuned...
Simple and easy to implement testbeds are needed further advance molecular communication research. To this end, paper presents an in-vessel testbed using magnetic nanoparticles dispersed in aqueous suspension as they also used for drug targeting biotechnology. The transmitter is realized by electronic pump injection via a Y-connector. A second provides background flow signal propagation. For reception, we employ susceptometer, device including coil, where the particles move through generate...
The radical cations of a family π-conjugated porphyrin arrays have been investigated: linear chains N = 1-6 porphyrins, 6-porphyrin nanoring and 12-porphyrin nanotube. were generated in solution by chemical electrochemical oxidation, probed vis-NIR-IR EPR spectroscopies. exhibit strong NIR bands at ∼1000 nm 2000-5000 nm, which shift to longer wavelength with increasing oligomer length. Analysis the IR spectra indicates that polaron is delocalized over 2-3 units oligomers. Some vibrational...
The reaction of R*2MeSi−SiX2X′ (X/X′ = Cl/Br, Br/Cl) with NaR* (R* supersilyl SitBu3) leads, probably via the silylenes R*2MeSi−SiX, to trans-configurated disilene (R*2MeSi)ClSi=SiCl(SiMeR*2), which could be isolated as orange-red crystals. According an X-ray structure analysis, central SiClSi=SiClSi framework − formation mechanisms are discussed is planar. Si=Si double bond short 2.163(4) Å and shows a band in Raman spectrum at 589 cm−1. Due its insolubility organic solvents, no NMR spectra...
Objective: We tested whether ischemic postconditioning (IPostC) is protective in remodeled myocardium. Methods: Post-myocardial infarct (MI)-remodeled hearts after permanent coronary artery ligation and one kidney clip (1K1C) hypertensive of male Wistar rats were exposed to 40 min ischemia followed by 90 reperfusion. IPostC was induced six cycles 10 s reperfusion interspersed no-flow ischemia. Activation injury salvage kinases measured using Western blotting vitro kinase activity assays....
Forest fragmentation and selective logging are two main drivers of global environmental change modify biodiversity conditions in many tropical forests. The consequences these changes for the functioning forest ecosystems have rarely been explored a comprehensive approach. In Kenyan rainforest, we studied six animal-mediated ecosystem processes recorded species richness community composition all animal taxa involved processes. We used linear models formal meta-analysis to test whether...
Although many exciting applications of molecular communication (MC) systems are envisioned to be at microscale, the MC testbeds reported in literature so far mostly macroscale. This may partially due fact that controlling an system microscale is challenging. To link macroworld microworld, we propose and demonstrate a biological signal conversion interface can also seen as modulator. In particular, proposed transduces optical signal, which controlled using light-emitting diode, into chemical...
This study presents a taxonomic update of the Tetramorium weitzeckeri species group. mpala sp. nov. is described from Laikipia, Kenya, and placed in T. complex. In addition, we also provide an illustrated identification key to three complexes group, updated this
Demographic shifts are part of the process social and economic change that has been taking place worldwide over last century. Europe is first large subcontinent to encounter effects an aging society [1]. The same pattern repeating in Latin America Japan but with a quicker pace transition compared which took countries now industrialized [2]. This situation impacts productivity growth due reduction working age population [3]. Additionally, increase number elderly people who make use service...
This work presents a single- and dual-port fully integrated millimeter-wave ultra-broadband vector network analyzer. Both circuits, realized in commercial 0.35-μm SiGe:C technology with an ft/fmax of 170/250 GHz, cover octave frequency bandwidth between 50-100 GHz. The presented chips can be configured to measure complex scattering parameters external devices or determine the permittivity different materials using dielectric sensor. are based on heterodyne architecture that achieves receiver...
In this paper, we study two novel massive multiple-input multiple-output (MIMO) transmitter architectures for millimeter wave (mmWave) communications which comprise few active antennas, each equipped with a dedicated radio frequency (RF) chain, that illuminate nearby large intelligent reflecting/transmitting surface (IRS/ITS). The IRS (ITS) consists of number low-cost and energy-efficient passive antenna elements are able to reflect (transmit) phase-shifted version the incident...
In this second part of our survey on experimental research in Synthetic Molecular Communication (SMC), we review works long-range SMC systems, i.e., systems with communication ranges more than a few millimeters. Despite the importance for evolution towards mature paradigm that will eventually support revolutionary applications beyond reach today's prevalent paradigms, existing body literature is still comparatively sparse. Long-range have been proposed information transmission two types...
Abstract Studies using machine learning (ML) approaches have reported high diagnostic accuracies for glaucoma detection. However, none assessed model performance across ethnicities. The aim of the study is to externally validate ML models detection from optical coherence tomography (OCT) data. We performed a prospective, cross-sectional study, where 514 Asians (257 glaucoma/257 controls) were enrolled construct detection, which was then tested on 356 (183 glaucoma/173 and 138 Caucasians (57...
The development of trustworthy simulation models is crucial for planning drug administration in magnetic targeting (MDT) interventions future cancer treatment. In the MDT therapy, bound to nanoparticles, which act as carriers and are guided through cardiovascular system into tumor region using an external field. Thus, modeling represents a multiphysical problem can be approached either by particle-based or concentration-based models. this paper, both approaches implemented COMSOL...
The sensitivity of primary splenic B cells to Fas-mediated apoptosis is modulated in a receptor-specific fashion. Here we used differential display strategy detect cDNAs present rendered Fas resistant but absent those sensitive. This led the cloning and characterization novel 1.2-kb gene that encodes inhibitory molecule (FAIM). faim-transfected BAL-17 lymphoma were less sensitive by half or more than vector-transfected controls, using ligand–bearing T cytotoxic anti-Fas antibody trigger Fas,...