VIDEO FRAME REDUCTION IN AUTONOMOUS VEHICLES

Camera sensors are emerging in many applications such as Smart Buildings and autonomous driving. The Data generated by multiple cameras in a smart building and autonomous driving applications is usually transmitted through an edge box to a cloud terminal. This transmitted information requires a considerable channel bandwidth, which is not available through current communication standards. The report proposes a Camera Sensor Frame Reduction method to decrease the required channel bandwidth for applications such as autonomous driving. Here, we propose a method that incorporates cross frame similarity measurement method to reduce the redundant frames and decrease the data rate of each camera. This approach adds processing to the camera sensor, which maps each camera to a smart one. In order to calculate cross frame correlation, each smart camera converts frames into blocks of sub-images. Next, we incorporate consecutive blocks to compute the overall cross frame correlation. The report studies block size selection and its impact on processing complexity and performance. We used real vehicle videos in different driving speed and scenarios to study the complexity and performance of the proposed method. We have investigated frame reduction rate as a function of vehicle traffic and driving environment

Structural and Luminescence Properties of Silica-Based Hybrids Containing New Silylated-Diketonato Europium(III) Complex

A new betadiketonate ligand displaying a trimethoxysilyl group as grafting function and a diketone moiety as complexing site (TTA-Si = 4,4,4-trifluoro-2-(3-trimethoxysilyl)propyl)-1-3-butanedione (C4H3S)COCH[(CH2)3Si(OCH3)3]COCF3) and its highly luminescent europium(III) complex [Eu(TTA-Si)3] have been synthesized and fully characterized. Luminescent silica-based hybrids have been prepared as well with this new complex grafted on the surface of dense silica nanoparticles (28 (+/-3 nm) or on mesoporous silica particles. The covalent bonding of Eu(TTA-Si)3 inside the core of uniform silica nanoparticles (40 (+/- 5 nm) was also achieved. Luminescence properties are discussed in relation to the europium chemical environment involved in each of the three hybrids. The general methodology proposed allowed high grafting ratios and overcame chelate release and tendency to agglomeration, and it could be applied to any silica matrix (in the core or at the surface, nanosized or not, dense or mesoporous) and therefore numerous applications such as luminescent markers and luminophors could be foreseen

Tekućinski antisolvent postupak taloženja za modifikaciju topljivosti bikalutamida

Liquid antisolvent process was explored as a solubility modulating tool. Bicalutamide, a poorly water soluble drug, was used as a candidate. Low aqueous solubility and poor dissolution of bicalutamide results into poor and variable bioavailability. Therefore, the objective of the present work was to modify the solubility of bicalutamide using the liquid antisolvent precipitation process. HPMC E5 and Poloxamer 407 were shortlisted as a hydrophilic polymer and surfactant, respectively, for the process. Process optimization was done with respect to the hydrophilic polymer, surfactant and drug loading concentration. The resultant microcrystals were characterized with various instrumental techniques for material characterization such as IR, DSC, SEM, XRD, particle size, specific surface area and dissolution kinetics.Tekućinski antisolvent postupak upotrijebljen je za moduliranje topljivosti bikalutamida. Zbog vrlo slabe topljivosti u vodi i sporog oslobađanja, bioraspoloživost bikalutamida je mala i varijabilna. Cilj rada je poboljšati topljivost bikalutamida koristeći antisolvent precipitaciju. Kao hidrofilni polimer korišten je HPMC E5, a kao surfaktant Poloxamer 407. Variranjem količine polimera, surfaktanta i lijeka proces je optimiran. Nastali mikrokristali analizirani su uobičajenim instrumentalnim tehnikama za karakterizaciju materijala kao što su IR, DSC, SEM, XRD, veličina čestica, specifična površina i brzina oslobađanja

A comparative study of non-covalent encapsulation methods for organic dyes into silica nanoparticles

Numerous luminophores may be encapsulated into silica nanoparticles (< 100 nm) using the reverse microemulsion process. Nevertheless, the behaviour and effect of such luminescent molecules appear to have been much less studied and may possibly prevent the encapsulation process from occurring. Such nanospheres represent attractive nanoplatforms for the development of biotargeted biocompatible luminescent tracers. Physical and chemical properties of the encapsulated molecules may be affected by the nanomatrix. This study examines the synthesis of different types of dispersed silica nanoparticles, the ability of the selected luminophores towards incorporation into the silica matrix of those nanoobjects as well as the photophysical properties of the produced dye-doped silica nanoparticles. The nanoparticles present mean diameters between 40 and 60 nm as shown by TEM analysis. Mainly, the photophysical characteristics of the dyes are retained upon their encapsulation into the silica matrix, leading to fluorescent silica nanoparticles. This feature article surveys recent research progress on the fabrication strategies of these dye-doped silica nanoparticles

Vortex dynamics at subcritical currents at microwave frequencies in DyBa2Cu3O7-δ thin films

We have investigated the dynamics of vortices at subcritical microwave currents in dc magnetic fields (up to 0.8 T) in epitaxial DyBa2Cu3O7-δ (DBCO) thin films. Microwave measurements were performed using microstrip resonators as test vehicles at 4.88 GHz and 9.55 GHz on laser ablated DBCO thin films in the thickness range 1800–3800 Å. Experimental evidence indicates that the peak effect (PE) observed in surface resistance vs temperature (Rs vs T) plots in applied dc magnetic fields up to 0.8 T is primarily due to the extended defects in thinner films (1800 Å) such as twin boundaries at the substrate(LaAlO3)-film interface; whereas, the high density of point defect disorder in thicker (≥3000 Å) films is responsible for low Rs and high depinning frequency ωp. This has been confirmed by generation of columnar defects using 200 MeV Ag ion irradiation which showed that even thicker DBCO films show PE in Rs after the introduction of columnar defects. Further, DBCO films grown on low-twinned LaAlO3 substrates (which cause low density of substrate-related extended defects in the film) have shown PE only at 9.55 GHz but not at 4.88 GHz. Values of ωp have been calculated from experimental Rs data. ωp vs T plots obtained for the thinner films show a peak which is a result of the peaks in Rs vs T plots of these films at 4.88 GHz and 9.55 GHz.