With significantly increasing share of variable renewable power generation like wind and solar PV, the need in the power system for ancillary services supporting the network frequency, voltage, etc. changes. Turning this issue around, market opportunities will emerge for wind and solar PV technology to deliver such grid services. In the European power system, adequate market mechanisms need to ...

BACKGROUND Variation in the management of acute pediatric asthma within emergency departments is largely unexplored. OBJECTIVES To investigate whether ancillary testing for patients with asthma would be associated with patient, physician, and hospital characteristics. METHODS The authors performed an analysis of a subset of patients from an extensive retrospective chart review of randomly s...

Following ISO9000 and ISO14000, SA8000 standard is now attracting international attention and it exerts influence on the export trade of China, particularly on the export trade of labor-intensive products. Because Chinese enterprises lack understanding of this standard and the importance attached to this standard in the government’s macro-administration is not sufficient, at this stage, only a ...

In most countries, micro-enterprises make up the majority of firms. Canada has more than 500,000 employer micro-enterprises, representing 77% of all firms (Industry Canada, 2001); if we include owner-operated firms with no employees, the number and proportion of microenterprises would be much larger. Although the development potential of this group of firms would seem to be huge, micro-enterpri...

In the severer market competition, the learning character of enterprises tends to be the most important resource of enterprises winning and maintaining market competence. By analyzing problems in talent cultivation based on learning enterprises at present in China, this thesis advances that enterprises can make efforts from these aspects: updating thoughts and opinions, improving enterprise qua...

This paper has combed the research results on internal control of small and medium manufacturing enterprises of domestic and foreign scholars. Combined with the status analysis of internal control and risk management of small and medium manufacturing enterprises, this paper built the internal control framework of small and medium manufacturing enterprises based on comprehensive risk management ...

This paper shows how a competitive ancillary service market for voltage control/reactive power might operate and what it might look like, given the eminently local nature of the service. An automatic voltage control would dynamically manage the reactive power available in a certain geographic region and a local market in reactive power could then be developed similarly to that proposed for the ...

Batteries can be used to provide ancillary services, such as primary frequency response. However, their energy capacity is limited. Therefore, set-point adjustments are necessary and the energy for this has still to be provided by power-plants that do not face energy constraints. This paper investigates various aspects of and potential benefits for power system operation and stability, if energ...

INTRODUCTION This is the protocol for an ancillary study to the multicentre Evidence for Contraceptive Options and HIV Outcomes (ECHO) Trial, a three-arm randomised trial comparing the effects of depot medroxyprogesterone acetate (DMPA), the levonorgestrel (LNG) implant and the copper intrauterine device (IUD) on HIV incidence (NCT02550067 pre-results). The ancillary study will compare other no...

Fine Needle Cytology (FNC) is often used in the diagnosis of lymph node enlargement as first diagnostic procedure. In some cases different cytological features may occur, with different histological aspects. In other cases, FNC samples are neither representative nor sufficient to exclude a possible lymphoproliferative process or a metastasis. In these cases, specific ancillary techniques such a...