The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Assessment and validation of the Electrical Impedance Tomography (EIT) system performance and calibration of systematic errors in the electrical field generated inside of the interrogated volume is an important requirement. System instabilities can be caused by the EIT design and must be characterized before and during the clinical trials. Evaluation of the Sussex EIT system used in the clinical study...
Für das Erkrankungsbild der obstruktiven Miktionsstörungen des unteren Harntraktes werden vielfältige Abkürzungen und Synonyme parallel verwendet. Die am häufigsten gebrauchte Bezeichnung der benignen Prostatahyperplasie (BPH) ist im eigentlichen Sinne eine rein histologische Diagnose und kann erst postoperativ gestellt werden. Das eigentliche klinische Symptombild wird unter den Begriffen des benignen Prostatasyndroms (BPS...
We demonstrate efficient generation of narrowband (< 100 GHz) THz pulses in the nanosecond range by using difference frequency generation in organic electro-optic crystals DSTMS and OH1. The terahertz output is tunable in the range of 1–20 THz and can be used for THz imaging and spectroscopy.
A tunable THz source for remote sensing has been realized using difference frequency generation of the signal and idler wavelengths of a BBO based optical parametric oscillator [1]. THz pulses with frequencies 1 – 20 THz and a bandwidth of less than 100 GHz are produced in two operational modes via difference frequency generation (DFG) process by mixing two infrared waves in novel organic crystals...
In parallel to their dynamic duty synchronous generators must be capable of bearing permanently an additional negative sequence current of up to 10% of the rated current according to the IEC 60034-1 standard. On turbine generators this does not only charge the damper winding but causes eddy currents and losses in the solid rotor iron in parallel. The complex current distribution cannot yet be satisfactorily...
In this paper, we present first investigations of self-pumped optical phase conjugation in Sn2P2S6 in the pico-second pulsed regime and demonstrate its applicability for efficient aberration corrections of a high-power side-pumped Nd:YVO4 amplifier at 1.06 mum.
This paper reports experimental results and numerical simulations for the impact of n-type interface on the performance of n-i-p type a-Si based solar cells deposited on stainless steel (SS) foil substrate. Here the n-type interface includes the interfaces of n-a-Si layer with i-a-Si layer and SS substrate. The obtained results show that 1) the extra interfacial layer between SS and the n-a-Si layer...
Today's computing tools allow machine designers to perform powerful novel calculations. In the course of a joint research project the 3D-magnetic field within the end-winding region of a 300 MVA hydropower generator was calculated. Due to the large dimensions of the machine, complex end-portion design of the stator core and a fractional slot winding the calculation case became typically very large...
The paper reports on the enhancement of the photorefractive characteristics by doping Sn2P2S6 with tellurium (Te) and antimony (Sb). A two-wave mixing measurement is performed in the wavelength range from 633 nm to 1064 nm and compare the doped crystals to conventional pure Sn2P2S6. By Sb doping the two-wave mixing gain Gamma at 633 nm is relatively high ( Γ= 20 cm-1), but is surpressed for wavelengths...
We demonstrate self-pumped optical phase conjugation in Te-doped Sn2P2S6 up to a wavelength of 1.06 mum. A phase conjugate reflectivity of more than 40 percent with a very fast rise time below 100 ms has been measured.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.