Search results for "Power"

ESTIMATING RAINFALL EROSIVITY BY DROP SIZE DISTRIBUTIONS

Water soil erosion is a process of detachment and transport of soil particles due to rainfall and runoff and it is the main cause of the modeling of extended portions of the earth's surface. The acceleration of the process through anthropogenic perturbation has severe impacts on soil and environmental quality. Soil erosion above a certain level will reduce soil productivity over the long haul. It exposes subsoil, which has often poor qualities for crop establishment and growth, and it can lead to stand loss by sediment deposition. A fundamental property of rainfall for understanding how it is made up is the raindrop size distribution (DSD). The knowledge of the raindrop size distribution at…

Valta ja muutos : ylimmän johdon tulkinta vallan ilmenemisestä organisaation strategisessa muutosprosessissa

2009

The global ranking game : narrowing academic excellence through numerical objectification

2018

The objective of this article is to study some of the intended and unintended effects on academe of the evolving global ranking game. I will start with some broader points on the global ranking game, the formal terms and economic interests it promotes, then continue with a presentation of the Shanghai ranking and its main rival the Times Higher Education. Through reversed engineering, I will bring out the main problems of the Shanghai ranking. I will finish with some of the key features of the demand side, the uses and effects of the tool: the psychosocial mechanisms that reproduce ranking and the lock-ins it creates. peerReviewed

Impacts of reduced Lepidurus arcticus availability on brown trout life history traits in a mountain reservoir

2020

Lepidurus arcticus (the Arctic tadpole shrimp) is a vulnerable keystone species in Arctic and alpine water bodies where its occurrence and population size may influence the viability and life history traits of resident salmonids. Using data from a Norwegian mountain hydropower reservoir, Aursjoen, we illustrate how reduced availability of L. arcticus as prey resulted in the reduced condition, growth and delayed maturation of resident brown trout (Salmo trutta). We further link changes in the relative abundance of L. arcticus as prey to changing reservoir conditions, e.g. water level changes in the spring period, thereby establishing an indirect link between reservoir operation regimes and b…

Limits of Power. Clerical Appointment as Part of Domestic Policy in Sweden after the Reformation, 1560–1611

2015

Abstract This article examines state-church relations in Sweden by analysing clerical appointment processes in the latter part of the 16th century. The aim is to ascertain whether the king of Sweden could appoint pastors independently, and if not, with whom he was compelled to share the power. Earlier studies argue that the power of the king grew due to the reformation. First, this article examines the number of clerical appointments that were made in the period 1560-1611. The results reveal a remarkable annual variation in the number of clerical appointments. Second, the timing and share of clerical appointments made by the king are studied. The number of appointments made by the king is v…

Roma e la regione Lazio: una questione ancora aperta

2021

the essay analyzes the historical debate on the Lazio region

Towards a theory of ex-combatant reintegration

2013

This paper encourages the development of a theoretical framework for the study of the reintegration of ex-combatants after war. It takes the first steps towards this by proposing a new definition of reintegration, where the processes ex-combatants experience, rather than the programmatic support offered by international and national agencies, take centre stage. The article links the study of reintegration to two broader disciplines; political economy and sociology, and in particular to the two disciplines’ account of power and group belonging. It argues that a political economy approach is particularly useful for making sense of the context in which reintegration processes unfold. The artic…

Toward farm-level health management of wind turbine systems: status and scope for improvements

2018

An outline of health management for OWFs has been detailed in this chapter with description of various important elements. The need for such farm level management is explained and benefits are discussed. Key gaps to be filled in order to realize such a system are identified. The proposed health management system is mainly based on the existing knowledge of fleet-level management in the aerospace sector. Health management is much broader than CM; there are a number of aspects beyond the prognostics capabilities that are to be designed in order to arrive at a comprehensive maintenance management scheme. A comprehensive maintenance program that is sensitive to the health of the assets and adap…

Dangerous Effects Induced on Power MOSFETs by Terrestrial Neutrons

2013

This paper investigates the effects that terrestrial neutrons can induce on power MOSFETs when they are biased during their normal working conditions especially in inverters for photovoltaic applications. After a brief review of power MOSFETs failure phenomena caused by neutron irradiation (with emphasis on so called “Single Event Effects” (SEE)), the results of an accelerated test performed with the Am-Be source at the University of Palermo are discussed.

Fault diagnosis of induction motors broken rotor bars by pattern recognition based on noise cancelation

2014

Current signal monitoring (CSM) can be used as an effective tool for diagnosing broken rotor bars fault in induction motors. In this paper, fault diagnosis and classification based on artificial neural networks (ANNs) is done in two stages. In the first stage, a filter is designed to remove irrelevant fault components (such as noise) of current signals. The coefficients of the filter are obtained by least square (LS) algorithm. Then by extracting suitable time domain features from filter's output, a neural network is trained for fault classification. The output vector of this network is represented in one of four categories that includes healthy mode, a 5 mm crack on a bar, one broken bar, …