1 " Pop quiz: what source of power doesn't come out of the ground, doesn't burn and isn't radioactive? … The answer is wind power, the technology that has become synonymous with going green " (Walsh 2009).

Wind farms (WFs) are believed to have an impact on lower boundary layer meteorology. A recent study examined satellite-measured land surface temperature data (LST) and found a local nighttime warming effect attributable to a group of four large WFs in Texas. This study furthers their work by investigating the impacts of five individual WFs in Iowa, where the land surface properties and climate ...

This paper presents the concepts of platformless DC connections of offshore wind power plants. First, the paper describes the feasible wind turbine drivetrain arrangements capable of producing sufficiently high DC voltage. Then, electrical system designs are proposed with consideration of balanced preferences between the DC wind turbine and the DC collection and transmission system. After that,...

Wind farms (WFs) can affect the local climate, and local climate change may influence underlying vegetation. Some studies have shown that WFs affect certain aspects of the regional climate, such as temperature and rainfall. However, there is still no evidence to demonstrate whether WFs can affect local vegetation growth, a significant part of the overall assessment of WF effects. In this resear...

A A iv Deseo expresar mi más sincero agradecimiento a mi profesor patrocinante Sr. Ricardo Sánchez, especialmente por su motivación y paciencia.

We report on Chandra ACIS imaging of the pulsar wind nebula (PWN) of the young Vela-like PSR B1706−44, which shows the now common pattern of an equatorial wind and polar jets. The structure is particularly rich, showing a relativistically boosted termination shock, jets with strong confinement, a surrounding radio/X-ray PWN and evidence for a quasi-static ‘bubble nebula’. The structures trace t...

While installing wind power into the liberalized power market can reduce the operation and fuel costs of the power system, it also increases the imbalance cost and need for reserve. Due to this contradictory, there is a need for planning the amount of wind power in the power system. This paper proposes a model following American power market rules to find the optimal participation of wind power...

We investigate various models of accretion disks for Sgr A*, one of the most puzzling sources in the Galaxy. The generic image we have taken into account consists of a black hole, an accretion disk, and a jet. Various accretion models are able to explain the low NIR ux of Sgr A*: a standard accretion disk with a jet, an ADAF, or an EDAF (Ejection Dominated Accretion Flow) model. We nd that all ...