Overvoltage

Thesis (M.S.)--University of Kansas, Chemistry, 1917. ; Includes bibliographical references

A diagnosis of low-order dynamics in the atmosphere of Mars

Introduction: There is considerable evidence that shows that the Martian atmosphere behaves in a more regular fashion than its terrestrial counterpart [1, 2, 3, 4]. This evidence leads to the hypothesis of theMartian climate attractor being of a relatively low dimension, which, in turn, would imply the possibility of describing the state of the atmosphere by means of a relatively few degrees of freedom. We explore this hypothesis by assuming that the atmospheric total energy (TE), i.e. the sum of kinetic energy and total potential energy (gravitational potential energy plus internal energy), is confined in a few coherent structures which dynamically interact nonlinearly with each other

Transient teleconnection event at the onset of a planet-encircling dust storm on Mars

We use proper orthogonal decomposition (POD) to study a transient teleconnection event at the onset of the 2001 planet-encircling dust storm on Mars, in terms of empirical orthogonal functions (EOFs). There are several differences between this and previous studies of atmospheric events using EOFs. First, instead of using a single variable such as surface pressure or geopotential height on a given pressure surface, we use a dataset describing the evolution in time of global and fully three-dimensional atmospheric fields such as horizontal velocity and temperature. These fields are produced by assimilating Thermal Emission Spectrometer observations from NASA's Mars Global Surveyor spacecraft into a Mars general circulation model. We use total atmospheric energy (TE) as a physically meaningful quantity which weights the state variables. Second, instead of adopting the EOFs to define teleconnection patterns as planetary-scale correlations that explain a large portion of long time-scale variability, we use EOFs to understand transient processes due to localised heating perturbations that have implications for the atmospheric circulation over distant regions. The localised perturbation is given by anomalous heating due to the enhanced presence of dust around the northern edge of the Hellas Planitia basin on Mars. We show that the localised disturbance is seemingly restricted to a small number (a few tens) of EOFs. These can be classified as low-order, transitional, or high-order EOFs according to the TE amount they explain throughout the event. Despite the global character of the EOFs, they show the capability of accounting for the localised effects of the perturbation via the presence of specific centres of action. We finally discuss possible applications for the study of terrestrial phenomena with similar characteristics

LGBTIQ + identities in tourism and leisure research: A systematic qualitative literature review

Tourism research on the LGBTIQ + communities has grown over the years, entering mainstream discussions as a segment of interest. This growing focus reflects greater societal acceptance and acknowledgement of the systemic inequalities that challenge their rights. The landscape of current scholarship, though important to academic literature, policy and practice, has not been explored. On this premise, and under the umbrella of social sustainability, a systematic qualitative review of scholarship on the LGBTIQ + community and tourism was conducted with Q1- and Q2-ranked travel and tourism journals (Scimago Journal & Country Rank) as a basis. Articles were analysed to identify the sampling parameters and their topic foci. The findings suggest the literature focuses on sexually diverse groups (gays and lesbians) who are open about their identity, with limited consideration given to bisexual or gender diverse travellers (intersex and transgender). The topics and language used have also evolved in recent years, transforming from earlier fixations on the sexual, to the exploration of other experiences related to the LGBTIQ + communities. This research reflects on this evolution, the implications for the broader queer communities, and proposes a research agenda for more robust inquiry concerning LGBTIQ + travel and leisure

Questioning the inclusivity of events: The queer perspective

Event programmes are typically designed with a target audience in mind, and such design can inherently signal inclusion or exclusion of marginalised segments. This is particularly the case for lesbian, gay, bisexual, transgender, intersex and queer (LGBTIQ+) individuals, whose sexual and gender identities position them as an invisible minority on the periphery of society. Given the role of events in building community spirit, it is essential to ensure all members of a community feel able to participate in order to create a sense of belonging, fulfilling Sustainable Development Goals of inclusivity in community. Through the lens of Social Dominance Theory and in pursuit of equality for LGBTIQ+ communities, in-depth interviews were conducted with sexually diverse (queer) participants to explore their perceptions of inclusivity at community events. This study explored how elements of an event could serve to enhance or attenuate prejudice, and therefore influence the inclusion of LGBTIQ+ communities

Competition, Change, and Coordination and Collaboration: Tracing news executives’ perceptions about participation in media innovation

Introduction Research Questions and Methods Results Discussion and conclusion Additional information Footnotes References Full Article Figures & data References Citations Metrics Licensing Reprints & Permissions View PDF View EPUB ABSTRACT Technological disruptions and increasing competition in the digital mediascape have fundamentally altered the market conditions for news media companies, raising corresponding concerns about the future of journalism. News media firms can adapt their business models by more purposefully focusing on media innovation, or the development and implementation of new processes, products or services. Specifically, this article focuses on innovation-centric coordination and collaboration—namely, coordination of knowledge and innovation activities among social actors in news media organizations. In doing so, this article builds on the knowledge-based view (KBV) of the firm and its core argument that coordination of knowledge is essential for organizational innovation. It presents findings from a series of cross-sectional surveys with newspaper executives carried out bi-annually from 2011 to 2017, examining executives’ perceptions of collaborative potential for digital media innovation at the intersection of editorial, business, and information technology (IT) departments. The findings suggest that there has been a significant increase in perceived collaboration more recently, and that the IT department is perceived to have become more important to innovation over time.This work was supported by Volda University College: [Grant Number Professor II research support to Oscar Westlund].publishedVersio

In Memoriam: Jean Luther Laffoon, 1922-1973

Jean L. Laffoon, Professor of Zoology and Entomology at Iowa State University, died January 19, 1973, in Ames, Iowa, after a brief illness. Dr. Laffoon was born in Sioux City Iowa on August 19 1922. He graduated from Central High School, Sioux Citv, in 1939 and was awarded a B.S. degree in biology from Morningside College in 1942. In the fall of that year he entered the University of Michigan, Ann Arbor, but withdrew to volunteer for service in the United States Navy. Upon his discharge, three years later, he enrolled in the Graduate College at Iowa State University, where he earned an M.S. degree in 1948 and a Ph.D. degree in 1953, both in entomology

If Blockchain is the answer what is the question?

The purpose of the paper is to identify the issues and challenges to employing blockchain technology for different operations context. The paper analyses five cases to identify drivers and barriers to adopting the technology. Our findings suggest that interoperability and platform dependency can limit the wide-scale deployment of the technology. Additionally, trust in rule-based software automation and consensus among supply chain actors can inhibit effective adoption. In summary, the paper finds that care should be taken when applying blockchain, since there are many situations where its implementation is not feasible or not beneficial

Reduced-order dynamics of the Martian atmospheric dynamics

In this paper we explore the possibility of deriving low-dimensional models of the dynamics of the Martian atmosphere. The analysis consists of a Proper Orthogonal Decomposition (POD) of the atmospheric streamfunction after first decomposing the vertical structure with a set of eigenmodes. The vertical modes were obtained from the quasi-geostrophic vertical structure equation. The empirical orthogonal functions (EOFs) were optimized to represent the atmospheric total energy. The total energy was used as the criterion to retain those modes with large energy content and discard the rest. The principal components (PCs) were analysed by means of Fourier analysis, so that the dominant frequencies could be identified. It was possible to observe the strong influence of the diurnal cycle and to identify the motion and vacillation of baroclinic waves