A Calibration Algorithm for Microelectromechanical Systems Accelerometers in Inertial Navigation Sensors

In the present work we develop an algorithm for calibrating MEMS sensors, which accounts for the nonorthogonality of the accelerometers' axis, as well as for the constant bias and scaling errors. We derive an explicit formula for computing the calibrated acceleration, given data from the sensors. We also study the error, that is caused by the nonorthogonality of the axis

Trapped ion emulation of electric dipole moment of neutral relativistic particles

The electric dipole moments of various neutral elementary particles, such as neutron, neutrinos, certain hypothetical dark matter particles and others, are predicted to exist by the standard model of high energy physics and various extensions of it. However, the predicted values are beyond the present experimental capabilities. We propose to simulate and emulate the electric dipole moment of neutral relativistic particles and the ensuing effects in the presence of electrostatic field by emulation of an extended Dirac equation in ion traps

Five-year follow-up of implants placed simultaneously with inferior alveolar nerve lateralisation or transposition

Introduction: The aim of this investigation was to evaluate the 5-year outcomes regarding presence of intraoperative and postoperative complications and the survival rate of implants placed simultaneously with lower alveolar nerve lateralization or transposition.Material and Methods: implants placement was performed on 34 patients with advanced atrophy of the posterior mandible simultaneously with lower alveolar nerve lateralization or transposition. Transposition was done only in two cases; in the rest of the cases lateralization of lower alveolar nerve was performed.Results: The survival rate at the end of the fifth year after implant placement was 100%. The mean height of residual bone at the region of implant placement was 2.76 mm. The mean marginal bone resorption for at the fifth year was 0.309 mm. In 20.6% of cases a positive BOP (bleeding on probing) was registered. 14.7% of the patients were free of symptoms of NSD (neuro-sensory dysfunction). In the rest of the patients the mean duration of NSD was 2.06 weeks. In 76.4% of patients the symptoms of NSD of nervus alveolaris inf. resolved after the second week. The maximum period of reported NSD was 6 weeks. No permanent NSD occured.Conclusion: Properly performed lateralization or transposition of the lower alveolar nerve is associated with minimal risk of permanent neuro-sensory dysfunction and providing an opportunity for placement of intraosseal implants in the posterior mandible with high survival rate

Some Aspects Of The Feeling Of Happiness In Patients With Multiple Sclerosis

Happiness is an emotional state that reflects the positive feelings and satisfaction of life. We examined the subjective feeling of happiness with a questionnaire (MSQOL-54) including a self-assessment of happiness in 80 MS patients with and without accompanying diseases at an average age of 42.95 ± 10.39 years between 2002 and 2015. The results were processed statistically by correlation analysis. There were statistically significant positive correlations between both the self-assessments of the health status and the sense of happiness of MS patients, as well as between the impact on public activities and the sense of happiness of these patients. There were also statistically significant negative correlations between depression and the sense of hap-piness in MS patients as well as between health-related quality of life assessments and the feeling of happi-ness of these patients

Sexual Disturbances in Patients with Multiple sclerosis

Multiple sclerosis (MS) is a demyelinating disease of the central nervous system that is accompanied by different concomitant diseases. We have investigated the frequency of sexual disorders as an element of individual quality of life with a questionnaire (MSQOL-54) in 80 MS patients at an average age of 42.95 ± 10.39 for the period between 2002 and 2015. Forty of them had between one and seven accompanying diseases. There were problems in both group of patients concerning specific indicators of sexual function expressed to varying degrees. Sexual disturbances further aggravate the vitality not only of MS patients, but also of those with MS and concomitant diseases and require timely diagnosis and treatment

Sensitivity improvement to active piezoresistive AFM probes using focused ion beam processing

This paper presents a comprehensive modeling and experimental verification of active piezoresistive atomic force microscopy (AFM) cantilevers, which are the technology enabling high-resolution and high-speed surface measurements. The mechanical structure of the cantilevers integrating Wheatstone piezoresistive was modified with the use of focused ion beam (FIB) technology in order to increase the deflection sensitivity with minimal influence on structure stiness and its resonance frequency. The FIB procedure was conducted based on the finite element modeling (FEM) methods. In order to monitor the increase in deflection sensitivity, the active piezoresistive cantilever was deflected using an actuator integrated within, which ensures reliable and precise assessment of the sensor properties. The proposed procedure led to a 2.5 increase in the deflection sensitivity, which was compared with the results of the calibration routine and analytical calculations

Qualitative effects of introducing nonlinear birth and death rates for the predator in a predator-prey type model

In this paper, we study how introducing nonlinear birth and death rates for the predator might affect the qualitative behavior of a mathematical model, describing predator-prey systems. We base our investigations on a known model, exhibiting anti-predator behavior. We propose a generalization of the latter by introducing generic birth and death rates for the predator and study the dynamics of the resulting system. We establish existence and uniqueness of positive model solutions, their uniform boundedness, existence, local stability and bifurcations of equilibrium points as well as global stability properties of the solutions. Most of the solution properties are demonstrated numerically and graphically by various numerical examples. Based on the obtained results, we show that the model with nonlinear birth and death rates can describe a much more complex behavior of the predator-prey system than the classical model (i.e., with linear rates) does

Comorbidity of Structural Epilepsy and Multiple Sclerosis: MRI, 18FFDG PET/CT and EEG Investigations

There is accumulating evidence of a mutual relationship between multiple sclerosis and structural epilepsy. Comorbidity of these severe neurological disorders is reported in numerous recent publications in the available foreign literature. Modern diagnostic tools include comprehensive neurological examinations as well as computed tomography, electroencephalography and 18FFDG positron emission tomography. In this paper we report the case of a female patient with multiple sclerosis and structural epilepsy

Clustering and Morphology Evolution of Gold on Nanostructured Surfaces of Silicon Carbide: Implications for Catalysis and Sensing

A fundamental understanding of the behavior of gold (Au) nanostructures deposited on functional surfaces is imperative to discover and leverage interface-related phenomena that can boost the efficiency of existing electronic devices in sensorics, catalysis, and spintronics. In the present work, Au layers with nominal thickness of 2 nm were sputter-deposited on graphenized SiC substrates represented by buffer layer (BuL)/4H-SiC and monolayer epitaxial graphene (MLG)/4H-SiC. Morphometric analysis by means of scanning electron microscopy shows that Au on BuL self-assembles in nearly round-shaped plasmonically active islands, while on MLG, a fractal growth of considerably larger and ramified islands is observed. To correlate the experimentally established differences in surface morphology on the two types of graphenized substrates with energetics and kinetics of Au nanostructure growth, the deposit-substrate interaction strength was studied using density functional theory (DFT) calculations, molecular dynamics simulations, and optical measurements. The theoretical considerations involve participation of Au clusters with different sizes and energetics at the initial stages of the metal nanostructure formation. The results indicate that gold exhibits a considerably stronger interaction with BuL than with MLG, which can be considered as a key aspect for explaining the experimentally observed morphological differences. From the statistical analysis of Raman spectra, indications of Au intercalation of MLG are discussed. The current research shows that, due to its unique surface chemistry, buffer layer has peculiar affinity to gold when compared to other atomically flat surfaces, which is beneficial for boosting high-performance catalytic and sensing technologies based on low-dimensional materials