Numerical stability analysis for aerostatic bearings was performed to obtain optimized design parameters small submillimeter millimeter range diameter cylindrical rotors. Such rotors are used in nuclear magnetic resonance (NMR) application rotate sample around an axis inclined by magic angle (54.74o) relative the field direction at rotational frequencies of about 100 kHz (magic-angle spinning, ...

The research addresses estimation and tracking of direction of arrival @OA) and associated parameters of narrowband and wideband signals impinging on a uniform linear array of sensors. The signals are modeled as sample functions of a Gaussian stochastic process. Computationally efficient, approximate maximum likelihood (ML) methods are developed for direction of arrival estimation of narrowband...

Direction finding and positioning systems based on RF signals are significantly impacted by multipath propagation, particularly in indoor environments. Existing algorithms (e.g MUSIC) perform poorly resolving Angle of Arrival (AoA) the presence or when operating a weak signal regime. We note that digitally sampled frontends allow for easy analysis signals, their delayed components. Low-cost Sof...

Water droplets impinging on micro-grooved polydimethylsiloxane surfaces were studied. Depending the impact velocity and surface roughness, different phenomena such as no bouncing, complete rebound (CR), bouncing occurring with droplet breakup (BDB), partial rebound, sticky state observed. The lower limit of for can be determined by balancing kinetic energy barrier due to contact angle hysteresi...

Due to the long spin lifetime and its optical electrical properties, GeSn is a promising candidate for integration of spintronics, photonics, electronics. Here, we investigate photoinduced inverse spin-Hall effect in alloy with 5% Sn concentration. We generate spin-polarized electron population at Γ point conduction band by means orientation, detect signal coming from spin-to-charge conversion ...

background: abnormal angulation of the lunate can be an indication of intercarpal pathology. on magnetic resonance images (mris) the lunate often looks dorsally angulated, even in healthy wrists. the tilt on individual slices can also be different and might be misinterpreted as pathological, contributing to inaccurate diagnoses and unnecessary surgery. the primary aim of this study was to deter...

We find the solutions of the Dirac equation for two plane waves (laser beams) and we determine the modified Compton formula for the scattering of two photons on an electron. The practical meaning of the two laser beams is, that two laser beams impinging on a target which is constituted from material in the form a foam, can replace 100-200 laser beams impinging on a normal target and it means th...

conclusions although some of the orthopedic surgeons are not interested to manage these fractures surgically and most of them treat these cases conservatively (casting, etc.), in most displaced intra-articular calcaneal fractures, surgical treatment is the method of choice. moreover, in non-surgical treatment the prevalence of these complications among the patients is more and as a result, inev...

Coastal embankments often collapse due to the tremendous destructive energy of an overtopping tsunami flow a deep scour by nappe flow. Hence, clarify formation condition overtopping, series tests were carried out within laboratory flume with immobile settings lowering downstream surface angle embankment model while keeping upstream slope constant (1:1) five non-dimensional depths and six differ...

Motivation and results Refractive microlenses arrays have been extensively used in a broad range of applications where focusing or imaging are an appealing alternative for applications where miniaturization and alignment simplicity are requirements [1]. Such microlenses can enhance the light on image sensors (by increasing their sensitivity), on biomedical instruments, on Lab-On-a-Chip systems,...