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Power electronics result in increased harmonic distortion, but can also be used for harmonic mitigation. This requires simple, low order models for nonlinear networks. The Harmonic Norton Equivalent is a load model structure that supports aggregation of nonlinear loads, and makes nonlinear network solving (i.e. simulation) a non-iterative procedure. It is a linearized description of the relation b
This article is presenting an overview of the literature devoted to entrepreneurial learning and, more speci cally, those research bringing environmental elements into the study of the entrepreneurial learning process. Then, it shows how each of the four Special Issue selected research papers contribute to enhancing our knowledge of the complexity of the learning process vis-à-vis entrepreneurial This article is presenting an overview of the literature devoted to entrepreneurial learning and, more speci cally, those research bringing environmental elements into the study of the entrepreneurial learning process. Then, it shows how each of the four Special Issue selected research papers contribute to enhancing our knowledge of the complexity of the learning process vis-à-vis entrepreneurial
In order to understand how visions and narratives about the Internet are articulated, negotiated, and circulated in China, one needs to address and unpack a number of interrelated issues. It is important to map who has the possibility to articulate visions on the Internet in China, who is actually doing it and why, what having a ‘vision’ actually means, and which platforms different individuals an
The Internet is often described as a space for creativity, empowerment, and knowledge that builds on a vision of freedom and borderless connectivity. It is also regarded as an enabler of different human rights, with some even considering access to the Internet as a human right itself. But is this perspective shared by all, and what is the situation like in China?
Transdisciplinary research and collaboration is widely acknowledged as a critical success factor for solution-oriented approaches that can tackle complex sustainability challenges, such as biodiversity loss, pollution, and climate-related hazards. In this context, city governments’ engagement in transdisciplinarity is generally seen as a key condition for societal transformation towards sustainabi
In the work, fifty soil samples were cultivated on selective Gauze agar medium plates containing carboymethyl cellulose as the sole carbon source. Thirty-two samples showed similarity to the morphological characteristics of Streptomyces bacterium which were tested for cellulolytic activity using the 3,5-Dinitrosalicylic acid reagent. Four efficient Streptomyces isolates were selected for their hig
BACKGROUND: Symptoms of anxiety, irritability, and agitation (AIA) are prevalent among patients with bipolar I disorder (BD-I) mania with depressive symptoms, and could potentially be used to aid physicians in the identification of this more severe form of BD-I. Using data from two clinical trials, the aims of this post hoc analysis were to describe the phenomenology of bipolar mania in terms of A
The service-dominant logic in the context of public services has only previously been studied empirically to a very limited degree. The purpose of this article is to provide knowledge of what the theory of service-dominant logic makes visible in public service practice. The empirical material is case concerning a new public service organisation – a service centre. The professionals’ own experienceThe service-dominant logic in the context of public services has only previously been studied empirically to a very limited degree. The purpose of this article is to provide knowledge of what the theory of service-dominant logic makes visible in public service practice. The empirical material is case concerning a new public service organisation – a service centre. The professionals’ own experience
Produkter som härrör från olika naturliga källor har använts i tusentals år av människor för deras vardagliga behov. Av dessa naturliga källor var växterna det mest prisvärda. Växtbaserade produkter användes för skydd, mat och som läkemedel. De medicinska egenskaperna hos växtbaserade produkter spelade en viktig roll i forntida civilisationer, och även i dagens dagar är de användbara på grund av dProducts derived from different natural sources have been used for thousands of years by human beings for their everyday needs. Out of these natural sources, plants were the most affordable. Plant-derived products were used for shelter, food, and as medicines. The medicinal properties of plant-derived products played an important role in ancient civilizations, and even in the present days they are
Let T : H 1 × H 2 × H 3 → C be a trilinear form, where H 1, H 2, H 3 are separable Hilbert spaces. In the hypothesis that at least two of the three spaces are finite dimensional we show that the norm square λ = ∥T∥2 is a root of a certain algebraic equation, usually of very high degree, which we baptize the millennia] equation, because it is an analogue of the secular equation in the bilinear case
The objective of this paper is to recognize and categorize the various ways that ecosystem services researchers perceive the concept and purpose of ecosystem services (ES). To do so, we employed the discourse analysis approach of Q methodology, where 33 researchers ranked 39 statements on ES derived from the literature. Factor analysis of the Q sorts allowed for the interpretation of five main per
A modularized approach to modeling of harmonics in electrical distribution networks at steady state is presented. It is based on harmonic balance and exploits that the loads in a distribution network are connected in parallel in such a way that their operating conditions are approximately known in advance (e.g. 230 V, 50 Hz) and the harmonic distortion of the voltage is limited. The model for a co
We give closed-form expressions for H-infinity optimal state feedback laws applicable to linear time-invariant discrete time systems with symmetric and Schur state matrix. This class includes networked systems with local dynamics in each node and control action along each edge. Furthermore, the structure of the controllers mimics that of the system, which makes them suitable for distributed contro
