250. rocznica powstania budżetu w Polsce?

250 W single-crystal fiber Yb:YAG laser.

We demonstrate an Yb:YAG single-crystal fiber laser with 251 W output power in continuous-wave and an optical efficiency of 44%. This performance can be explained by the high overlap between pump and signal beams brought by the pump guiding and by the good thermal management provided by the single-crystal fiber geometry. The oscillator performance with a reflectivity of the output coupler as lo...

A 250 W High Density Point - of - Load Converter

This thesis describes the design and construction of a 250 W, 35-60 Vin, 5 Vout dc-dc power converter with a switching frequency of 500 kHz. The converter uses square wave switching and is composed of two power processing stages in series. The first stage, a boost converter, regulates the output voltage of the converter. The second stage, a push-pull converter operating at 100% duty-cycle, prov...

250 W flyback SMPS design for a big size CTV

This paper presents the design criteria, procedure and implementation of an AC-DC Flyback Switch Mode Power Supply (SMPS) which provides 250W rated average power to a big size Colour Television (CTV) Set with a DVD player. A novel technique is developed to keep the Stand-By power consumption of Flyback SMPS under 1W and a boost type of Active Power Factor Correction (Active PFC) preconverter is...

Rejestr głównych typów operacji kardiochirurgicznych w 2015 r. w poszczególnych ośrodkach w Polsce (wg Krajowego Rejestru Operacji Kardiochirurgicznych KROK, Warszawa, 2016)

[Interventional cardiology in Poland in the year 2012. Summary report of the Association of Cardiovascular Interventions of the Polish Cardiac Society].

Kardiologia interwencyjna w Polsce w 2012 roku. (w STEMI 38%).