Search results for "wbg"
showing 5 items of 5 documents
Estudio de la fiabilidad de los dispositivos HEMT de GaN
2021
El presente trabajo de tesis en Ingeniería Electrónica tiene como objetivo el estudio de la fiabilidad de dispositivos HEMT (High Electron Mobility Transistor) de GaN (Gallium Nitride). Gracias a las ventajas teóricas en el uso de dispositivos GaN frente a dispositivos de Silicio y a la aparición de dispositivos GaN que mejoran las prestaciones de sus homónimos de Silicio, el siguiente paso, es el estudio de la fiabilidad que presentan estos dispositivos en la actualidad, con el objetivo de mejorarlos e investigar los límites actuales en determinadas aplicaciones de potencia. La investigación realizada en esta tesis se divide en tres partes claramente diferenciadas. La primera de ellas trat…
Mean Radiant Temperature Measurements through Small Black Globes under Forced Convection Conditions
2021
One of the most critical variables in the field of thermal comfort measurements is the mean radiant temperature which is typically measured with a standard 150 mm black globe thermometer. This is also the reference instrument required for the assessment of heat stress conditions by means of the well-known Wet Bulb Globe Temperature index (WBGT). However, one of the limitations of this method is represented by the relatively long response time. This is why in recent years there has been a more and more pressing need of smart sensors for controlling Heating Ventilation and Air Conditioning (HVAC) systems, and for pocket heat stress meters (e.g., WBGT meters provided with table tennis balls). …
Entrepreneurial choices depend on trust : Some global evidence
2022
Interpersonal trust and people’s trust in institutions are important components of social capital, which has been shown to have not only innate social value but also diverse direct and indirect positive social and economic impacts. Using data for an economically and globally diverse group of countries, we examine empirically how changes in interpersonal trust and trust in institutions affect entrepreneurship over time. Our findings suggest that (1) enhancing either type of trust leads to more entrepreneurial activity and (2) an increase in interpersonal trust causes a structural change in the composition of the TEA-type entrepreneurship. Increased trust reduces the share of relatively lower…
I sistemi di giustizia interna delle Organizzazioni Internazionali: profili amministrativi.
2022
Gli ordinamenti interni delle Organizzazioni Internazionali, che ne regolano la struttura ed il funzionamento in modo autonomo ed indipendente, sono certamente meno completi rispetto agli ordinamenti interni nazionali, ma sono caratterizzati anch’essi da istituzioni ed apparati burocratici complessi votati al perseguimento dei fini pubblici individuati dal trattato costitutivo. Gli ordinamenti delle Organizzazioni Internazionali hanno caratteristiche particolari che, per essere interpretate, richiedono metodologie e strumenti di analisi specifici, nonché categorie giuridiche nuove (o reinterpretate alla luce delle peculiarità del contesto internazionale), e ciò indubbiamente rende difficile…
The Effect of a Nucleation Layer on Morphology and Grain Size in MOCVD-Grown β-Ga2O3 Thin Films on C-Plane Sapphire
2022
This research is funded by the Latvian Council of Science project “Epitaxial Ga2O3 thin films as ultrawide bandgap topological transparent electrodes for ultraviolet optoelectronics” No. lzp-2020/1-0345. S.O. was supported by the European Union’s Horizon 2020 program, under Grant Agreement No. 856705 (ERA Chair “MATTER”). Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART².