Now showing items 21-30 of 695
Epitaxial growth and characterization of coaxial GaN/InGaN/GaN nano-structures
The development of a fabrication process for highly crystalline and position controlled GaN based nano- and submicron-structures together with the respective coaxial InGaN quantum well overgrowth was the focus of this ...
Multi-functional Monolithic ICs for 94GHz Transmitters on Silicon
The atmospheric transmission window at 94 GHz is an established allocation for radar sensors. This wavelength can penetrate fog, clouds, or textile materials and offer good spatial resolution. Applications are indicated ...
Impulse-radio ultra-wideband circuits for communication and radar sensing
This dissertation presents a differential UWB chipset for communication and medical sensing. The key components are UWB impulse generators, LNA, correlator and energy detection circuit. A quenched-oscillation concept is ...
Increasing the bandwidth efficiency of OFDM-MFSK
Noncoherent detection is very attractive when transmitting over fast time-variant frequency selective fading channels, since it is difficult or even impossible to obtain reliable channel state information. OFDM-MFSK and ...
Simple Temporal Networks with Partially Shrinkable Uncertainty (extended version)
The Simple Temporal Network with Uncertainty (STNU) model focuses on the representation and evaluation of temporal constraints on time-point variables (timepoints), of which some (i.e. contingent timepoints) cannot be ...
Analysis of the green gap problem in III-nitride LEDs
The green gap problem refers to the lack of high-efficacy LEDs in the green-yellow range of the visible spectrum. From the side of the III-nitride LEDs, it is caused mainly by the increase of the efficiency droop, but also ...
Intraoperative Bildgebung bei intrakraniellen Tumoren: Fachgebiet Neurochirurgie, als kumulative Habilitationsschrift der Medizinischen Fakultät der Universität Ulm
(Universität Ulm, 2015)
The effects of aging on hematopoietic stem cells
HSC are responsible for the life-long production of the blood, thereby making them one of the few blood cells that truly age. However, their functional activity declines with increasing age. While many drivers of HSC aging ...
Implementierung der Entwicklungs-psychologischen Beratung in die Berufspraxis
Die Entwicklungspsychologische Beratung (EPB) ist ein Beratungsangebot zur frühen Beziehungsförderung zwischen Eltern und Kind. Diese Arbeit untersuchte die Implementierung der berufsbegleitenden Weiterbildung für Fachkräfte ...
Immunomodulatory effects and migratory activity of multipotent mesenchymal stromal cells in the posttraumatic inflammatory response
After a polytrauma (PT), the release of massive amounts of endogenous alarmins and inflammatory mediators often bears the risk of a systemic inflammatory response syndrome (SIRS) and multi-organ failure. Upon injury, levels ...