scholarly journals General Description of Nonnegative Waveforms up to Second Harmonic for Power Amplifier Modelling

2014 ◽  
Vol 2014 ◽  
pp. 1-18 ◽  
Author(s):  
Anamarija Juhas ◽  
Ladislav A. Novak
Keyword(s):  
Case Studies ◽  
Power Amplifier ◽  
Second Harmonic ◽  
Practical Interest ◽  
General Description ◽  
Maximal Amplitude ◽  
The Third

General description of nonnegative waveforms up to second harmonic in terms of independent (unconstrained) parameters is provided. Three important subclasses of the class of nonnegative waveforms are also fully characterised: nonnegative waveforms with maximal amplitude of fundamental harmonic for prescribed amplitude of second harmonic, nonnegative waveforms with maximal coefficient of cosine part of fundamental harmonic for prescribed coefficients of second harmonic, and nonnegative waveforms with at least one zero. We prove that members of the first two subclasses have at least one zero; that is, they also belong to the third subclass. Nonnegative cosine waveforms up to second harmonic are also considered and characterised. A number of case studies of practical interest for power amplifier (PA) design, involving nonnegative waveforms up to second harmonic, are also considered.

scholarly journals Conflict Set and Waveform Modelling for Power Amplifier Design

2015 ◽  
Vol 2015 ◽  
pp. 1-29 ◽  
Author(s):  
Anamarija Juhas ◽  
Ladislav A. Novak
Keyword(s):  
Closed Form ◽  
Case Studies ◽  
Power Amplifier ◽  
Global Minima ◽  
Maximal Amplitude ◽  
Keen Interest ◽  
Waveform Modelling ◽  
Amplifier Design ◽  
Dc Component ◽  
Optimal Waveforms

Various classes of nonnegative waveforms containing dc component, fundamental andkthharmonick≥2, which proved to be of interest in waveform modelling for power amplifier (PA) design, are considered in this paper. In optimization of PA efficiency, nonnegative waveforms with maximal amplitude of fundamental harmonic and those with maximal coefficient of cosine term of fundamental harmonic (optimal waveforms) play an important role. Optimal waveforms have multiple global minima and this fact closely relates the problem of optimization of PA efficiency to the concept of conflict set. There is also keen interest in finding descriptions for various classes of suboptimal waveforms, such as nonnegative waveforms with at least one zero, nonnegative waveforms with maximal amplitude of fundamental harmonic for prescribed amplitude ofkthharmonic, nonnegative waveforms with maximal coefficient of cosine part of fundamental harmonic for prescribed coefficients ofkthharmonic, and nonnegative cosine waveforms with at least one zero. Closed form descriptions for all these suboptimal types of waveforms are provided in this paper. Suboptimal waveforms may also have multiple global minima and therefore be related to the concept of conflict set. Four case studies of usage of closed form descriptions of nonnegative waveforms in PA modelling are also provided.

NEW TECHNOLOGIES AND PRACTICES FOR WASTE MINIMIZATION IN THE CHEMICAL AND PETROCHEMICAL INDUSTRIES : FINDINGS OF THE SALVADOR, BRAZIL, 1993 CONFERENCE

1994 ◽  
Vol 30 (3) ◽  
pp. 1-9
Author(s):  
Francisco Fontes Lima ◽  
Francisco Alves Pereira
Keyword(s):  
Waste Management ◽  
Environmental Protection ◽  
Case Studies ◽  
New Technologies ◽  
Waste Minimization ◽  
Source Control ◽  
International Conference ◽  
The Third ◽  
Control Programmes ◽  
Petrochemical Industries

This paper describes the findings of the “Third International Conference on Waste Management in the Chemical and Petrochemical Industries,” held in Salvador, Brazil, October 20-23, 1993. A summary of the 74 technical papers, divided into six major categories, is presented together with comments on the more stringent legislation concerning source control programmes. Case studies of two large chemical complexes that have been developing successful waste minimization programmes are described in detail: CETREL-Environmental Protection Company in Camaçari, Brazil, and BASF AG in Ludwigshafen, Germany.

Conclusion

2018 ◽  
Author(s):  
John West
Keyword(s):  
Eighteenth Century ◽  
Case Studies ◽  
Literary History ◽  
The Political ◽  
The Third ◽  
Religious Differences

Literary history often positions Dryden as the precursor to the great Tory satirists of the eighteenth century, like Pope and Swift. Yet a surprising number of Whig writers expressed deep admiration for Dryden, despite their political and religious differences. They were particularly drawn to the enthusiastic dimensions of his writing. After a short reading of Dryden’s poem to his younger Whig contemporary William Congreve, this concluding chapter presents three case studies of Whig writers who used Dryden to develop their own ideas of enthusiastic literature. These three writers are Elizabeth Singer Rowe, John Dennis, and the Third Earl of Shaftesbury. These case studies are used to critique the political polarizations of seventeenth- and eighteenth-century literary history and to stress instead how literary friendship crossed political allegiances, and how writers of differing ideological positions competed to control mutually appealing ideas and vocabularies.

A Social Sonic Paradigm

2021 ◽  
pp. 540-554
Author(s):  
Tegan Bristow ◽  
João Orecchia Zúñiga
Keyword(s):  
Case Studies ◽  
Southern Africa ◽  
Political Engagement ◽  
Sound Art ◽  
Intellectual Engagement ◽  
The Third ◽  
Primary Focus ◽  
Definition Of ◽  
Forms Of Knowledge

This chapter presents an examination of why—in contemporary Africa, with Southern Africa as the primary focus—there are very few artists working with sound in a manner that fits the paradigm of sound art as it is known in Euro-America. Emphasis is not placed on a lack of intellectual engagement, which is significant in the Euro-American definition of sound art. What is presented does not aim to deviate from this, but rather acts to affirm an engagement with alternative forms of knowledge and mechanisms of sound found in the South. Three areas are explored; these however are interlinked and do not stand alone. The first is an understanding of the practice of interdisciplinarity as political engagement. The second explores the role of community and communal interaction with sound and how this is fundamental to form in the region. The third extends this by showing how the histories of knowledge and power are fundamental to these explorations in the region, emphasizing how contemporary explorations of sound are used to both contain and shift these histories. The chapter takes shape with the use of case studies and draws on interviews conducted by the authors.

scholarly journals Public and Private Ownership in the Iranian Constitution: Principle 44, A Barrier for Development

2017 ◽  
Vol 10 (4) ◽  
pp. 73
Author(s):  
Ahmad Torabi
Keyword(s):  
Case Studies ◽  
Economic Impacts ◽  
Private Ownership ◽  
Public Ownership ◽  
Public And Private ◽  
The Third ◽  
Public Property ◽  
Legal Challenges ◽  
The Law ◽  
The Government

The Iranian legislator has sought to protect public property and public ownership in the Iranian Constitution in accordance with Islamic principles, terms and procedures. There are a number of principles that have been directly applied to this purpose; however, one principle has had a very significant impact on government domination of the economy of Iran: principle 44. This principle does not directly describe public property; rather, it aims to determine the areas that are under public ownership and are administered by the government. However, the principle has some contradictions and legal challenges in itself. In addition, the supplementary law that has been enacted to provide the areas for the enforcement of principle 44 fails to secure the aims of the legislator. Therefore, this paper analyses legal challenges of the principle, as well as its supplementary law, and gives suggestions to solve the challenges.This paper is divided into four sections. The first section provides an analysis of the principle itself, and its relationship and consistency with other principles of the constitution. In the second section, the Law of Implementation of Principle 44 and the legal challenges that arise from it will be discussed. The third section focuses on the negative economic impacts of this law, as well as case studies of it. Lastly, the paper provides a summary of suggestions to amend this law.

Naturalized Aesthetics and Emotion Theory

Projections ◽  
2018 ◽  
Vol 12 (2) ◽  
pp. 76-85 ◽  
Author(s):  
Rainer Reisenzein
Keyword(s):  
Empirical Evidence ◽  
Case Studies ◽  
Integrated System ◽  
Third Culture ◽  
Extended Version ◽  
Basic Emotions ◽  
The Third ◽  
Psychological Theories ◽  
Concrete Application ◽  
Emotion Theory

Murray Smith’s proposal in Film, Art, and the Third Culture for a naturalized aesthetics is of interest to both film theorists and psychologists: for the former, it helps to elucidate how films work; for the latter, it provides concrete application cases of psychological theories. However, there are reasons for believing that the theory of emotions that Smith has adopted from psychology to ground his case studies—an extended version of basic emotions theory—is less well supported than he suggests. The available empirical evidence seems more compatible with the assumption that the different emotions are outputs of a single, integrated system.

Exploiting Hitler’s Magic

2017 ◽  
Author(s):  
Eric Kurlander
Keyword(s):  
Case Studies ◽  
Third Reich ◽  
National Socialist ◽  
Book Of Revelation ◽  
Objective Reality ◽  
The Third ◽  
Political Campaigning ◽  
The Third Reich ◽  
The Masses ◽  
The Relationship

This chapter illustrates how the National Socialist Workers' Party (NSDAP) appropriated supernatural ideas in order to appeal to ordinary Germans, enlisting the help of occultists and horror writers in shaping propaganda and political campaigning. By exploiting the supernatural imaginary, Hitler tied his political mission into something out of the Book of Revelation, as one ‘divinely chosen’ to create the Third Reich. The chapter then looks at three case studies. The first assesses Hitler's approach to politics through his reading of Ernst Schertel's 1923 occult treatise, Magic: History, Theory, Practice. The second considers the NSDAP's propaganda collaboration with the horror writer, Hanns Heinz Ewers. The third delves into the relationship between the NSDAP and Weimar's most popular ‘magician’, Erik Hanussen. In coopting Schertel's magic, enlisting Ewers, and forming an alliance with Hanussen, the Nazis diverted the masses from objective reality and toward the coming Third Reich.

scholarly journals Rethinking Streets for Physical Distancing

2021 ◽  
Author(s):  
Marc Schlossberg ◽  
◽  
Rebecca Lewis ◽  
Aliza Whalen ◽  
Clare Haley ◽  
...  
Keyword(s):  
Best Practices ◽  
Case Studies ◽  
Evidence Based ◽  
The Third ◽  
Spatial Equity ◽  
Outdoor Space ◽  
Primary Output ◽  
Page Book

This report summarizes the primary output of this project, a book of COVID-era street reconfiguration case studies called Rethinking Streets During COVID-19: An Evidence-Based Guide to 25 Quick Redesigns for Physical Distancing, Public Use, and Spatial Equity. COVID-era needs have accelerated the process that many communities use to make street transformations due to: a need to remain physically distanced from others outside our immediate household; a need for more outdoor space close to home in every part of every community to access and enjoy; a need for more space to provide efficient mobility for essential workers in particular; and a need for more space for local businesses as they try to remain open safely. This project is the third in a series of NITC-supported case study books on best practices in street reconfigurations for more active, sustainable, and in this case, COVID-supportive uses. The full, 154-page book is available for free download from the National Institute for Transportation and Communities (NITC).

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