In this paper, several types of iterative learning control (ILC) schemes for hard disk drive (HDD) control, including previous cycle learning (PCL), current cycle learning (CCL) and their combination, are designed and analyzed under the sampled-data environment. The feedback loop of the CCL stabilizes the system in time domain while the PCL guarantees the convergence along the iteration axis. T...

Regulatory T cells (Tregs) that expand in human colon cancer express retinoid-related orphan receptor γt (RORγt) and exert potent T-cell suppressive functions while mediating pro-inflammatory effects. Similar Tregs expand and drive a vicious cycle of inflammation in murine polyposis. Targeting RORγt in Tregs interrupts such a cycle and protects mice against polyposis, suggesting that a similar ...

We present studies of super#uid 4He #ow through an array of apertures using a diaphragm-aperture oscillator technique. The apertures, which have diameters of the order of 100 nm and are typically spaced a few microns apart, are made in a 90 nm thick SiN membrane. We have measured the supercritical #ow through the array as a function of temperature and oscillator drive. At low temperatures, the ...

Electrified vehicles on the market today all use the classical two-level inverter as the propulsion inverter. This thesis analyse the potential of using a cascaded H-bridge multilevel inverter as the propulsion inverter. With a multilevel inverter, the battery is divided into several parts and the inverter can now create voltages in smaller voltage levels than the two-level inverter. This, amon...

Electrons ejected from atoms and subsequently driven to high energies in strong laser fields enable techniques from attosecond pulse generation to imaging with rescattered electrons. Analogous processes govern strong-field electron emission from nanostructures, where long wavelength radiation and large local field enhancements hold the promise for producing electrons with substantially higher e...

Growing environmental concern prompts vehicle users to search for cleaner and ecological transport modes. Many consumers organizations have decided replace conventional diesel or gasoline powered vehicles with alternative drive alternative-powered vehicles. Operating conditions may a heavy influence on the operating parameters of vehicles, such as: airpollution emission, energy consumption fuel...