Stellar laboratories. V. The Xe VI ultraviolet spectrum and the xenon abundance in the hot DO-type white dwarf RE0503-289

For the spectral analysis of spectra of hot stars with a high resolution and high signal-to-noise ratio (S/N), advanced non-local thermodynamic equilibrium (NLTE) model atmospheres are mandatory. These are strongly dependent on the reliability of the atomic data that are used for their calculation. Reliable Xe VI oscillator strengths are used to identify Xe lines in the ultraviolet spectrum of the DO-type white dwarf RE0503-289 and to determine its photospheric Xe abundance. We publish newly calculated oscillator strengths that are based on a recently measured Xe VI laboratory line spectrum. These strengths were used to consider their radiative and collisional bound-bound transitions in detail in our NLTE stellar-atmosphere models to analyze Xe VI lines exhibited in high-resolution and high S/N UV observations of RE0503-289. We identify three hitherto unknown Xe VI lines in the ultraviolet spectrum of RE0503-289 and confirm the previously measured photospheric Xe abundance of this white dwarf (log Xe = -4.2 +/- 0.6). Reliable measurements and calculations of atomic data are prerequisite for stellar-atmosphere modeling. Observed Xe VI line profiles in the ultraviolet spectrum of the white dwarf RE0503-289 were well reproduced with the newly calculated Xe VI oscillator strengths.Comment: 3 pages, 4 figure

Implications of Contemporary Leadership Models on Sales Management

As organizations have discovered that they cannot solely compete on price, product, quality, or technology, organizations have sought the use of optimum leadership models to assist with competition and survival. After examining the evolution of three contemporary leadership models: Spiritual Leadership, Primal Leadership, and Innovative Leadership, it is shown that these models offer sustenance in various ways for organizations and employees. Furthermore, because of the introduction and practice of Spiritual Leadership, Primal Leadership, and Innovative Leadership, specific implications exist for sales management as related to their sales reps and to their customers

Exploring the Sufficiency of Undergraduate Students’ Cybersecurity Knowledge Within Top Universities’ Entrepreneurship Programs

Small businesses using technology are at risk of cyberattacks and often do not have adequate cybersecurity knowledge, budgets, or dedicated security staff. Attackers know small businesses are accordingly vulnerable. An attack can result in severe losses or the closure of business, making this knowledge critical. Businesses ownership can originate with newly graduated entrepreneurship students, so that sample is selected for this study to determine if cybersecurity knowledge is gained through undergraduate curriculum. The preliminary findings of the study imply that entrepreneurship education might be enhanced with coursework that would help future small businesses avoid becoming victims of cyberattacks

The Utilization of Instructional Technologies to Augment Traditional Instructional Strategies Within Online Undergraduate Entrepreneurship Programs

Researchers have categorized the methods used to teach entrepreneurship in a face-to-face delivery mode. However, little research has examined methods used for teaching entrepreneurship online. Accordingly, this paper surveys faculty and program chairs at universities that offer online entrepreneurship courses in order to establish a baseline of instructional strategies used within online entrepreneurial education. Since extant literature on effective entrepreneurial teaching methods emphasize the inclusion of entrepreneurship exercises to be experiential and creative, the authors build upon their survey baseline by suggesting five typical activities from the online canon and re-purpose them to increase the experiential nature of such exercises

A Study of Crowdsourcing in Undergraduate Entrepreneurship Education

Crowdsourcing is an approach to harness knowledge and support from crowds using online platforms. Its use occurs within businesses and academia. Small businesses especially derive value from crowdsourcing because entrepreneurs have startup costs as well as time challenges to bring services/products to market. Entrepreneurs may also seek innovation and authenticity to differentiate from competitors. Since crowdsourcing offers these benefits, the researchers queried faculty from public and private universities who taught undergraduate classes in entrepreneurship to explore teaching methods utilized as well as specific aspects of crowdsourcing that were included. Researchers analyzed the resulting crowdsourcing gaps as well as crowdsourcing teaching challenges. Based upon their findings, new crowdsourcing learning activities and strategies were developed such that undergraduate entrepreneurship students may further benefit from crowdsourcing

Destruction of a protected habitat by an invasive alien species: the case of Cydalima perspectalis (Walker, 1859) in the box tree formations of Liguria (North-West Italy) (Lepidoptera: Crambidae)

The box tree moth, Cydalima perspectalis (Walker, 1859), an invasive alien species of Asian origin associated with box trees, gained immediate attention in Europe due to the damage caused to ornamental stands and its rapid spread. However, its effects on natural box tree formations remained poorly investigated, especially in Southern Europe. In Liguria (North-West Italy), attacked xerotermophilous box tree formations on rocky substrate, a protected habitat (5110) after the Natura 2000 EU 92/43 Directive, seriously endangering its long-term survival. Since detection in 2013, this species defoliated almost the whole area covered by habitat 5110, until experiencing a population crash after depleting its only trophic resource. We present here the evolution of the invasion and the population dynamics of this invasive alien species in Liguria during the years 2016-2017

New spectroscopic data for atomic tungsten XIV

The thirteen times ionized tungsten is isoelectronic with PmI. Wavelengths and transition probabilities for the 5s-5p and 5p-5d transitions of WXIV, identifying the ground state as 4f13 5s2 2F7/2 were calculated. Both, a relativistic Hartree Fock approach, including core-polarization effects, and a purely relativistic multiconfiguration Dirac-Fock method were used for the calculations. Particularly, 5s-5p transitions were compared with experimental results obtained with VUV electron beam ion trap (EBIT) spectroscopy583CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESnão temnão tem17th International conference on the physics of highly charged ionsThis research was supported by the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina, by the Coordenaçăo de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) and by the Conselho Nacional de Pesquisa (CNPq), Brazil. The Comisión de Investigaciones Científcas de la Provincia de Buenos Aires (CIC), where J. G. Reyna Almandos and M. Raineri are researchers, is also gratefully acknowledge