2,739 research outputs found
NASA micromin computer Monthly progress letter, Jan. 1967
Microminiature circuit development for flight control computer
The impact of brand value on brand competitiveness
The role of brand value in driving brand competitiveness has recently received attention from marketing scholars like Winzar et al. (2018). From the perspectives of marketing and strategic orientation, we propose and test a framework that depicts the effects of these variables on brand competitiveness. Development of the framework was achieved by synthesising existing research from the marketing and management streams. A convenience sample of 374 retailers who worked with the brand as its business customers completed a survey questionnaire. Structural Equation Modelling (SEM) was employed to test the proposed model. We found that brand value, created for business customers, indirectly enhances brand competitiveness through marketing orientation, albeit not directly. Moreover, brand differentiation directly and positively influences brand competitiveness in addition to building brand value. Our study is one of the initial attempts to explore the capability of brand value to bring together market orientation and strategic orientation for brand competitiveness and also extend the periphery of current knowledge about the variables that drive the competitiveness of a brand
Comparison of quantum mechanical and classical trajectory calculations of cross sections for ion-atom impact ionization of negative - and positive -ions for heavy ion fusion applications
Stripping cross sections in nitrogen have been calculated using the classical
trajectory approximation and the Born approximation of quantum mechanics for
the outer shell electrons of 3.2GeV I and Cs ions. A large
difference in cross section, up to a factor of six, calculated in quantum
mechanics and classical mechanics, has been obtained. Because at such high
velocities the Born approximation is well validated, the classical trajectory
approach fails to correctly predict the stripping cross sections at high
energies for electron orbitals with low ionization potential.Comment: submitted to Phys. Rev.
โKnowing as we goโ: a Hunter-Gatherer Behavioural Model to Guide Innovation in Sport Science
Where do novel and innovative ideas in sport science come from? How do researchers and practitioners collectively explore the dynamic landscape of inquiry, problem, solution and application? How do they learn to skilfully navigate from current place and practice toward the next idea located beyond their current vantage point? These questions are not just of philosophical value but are important for understanding how to provide high-quality support for athletes and sport participants at all levels of expertise and performance. Grounded in concepts from social anthropology, and theoretically positioned within an ecological dynamics framework, this opinion piece introduces a hunter-gatherer model of human behaviour based on wayfinding, situating it as a conceptual guide for implementing innovations in sport science. Here, we contend that the embedded knowledge of a landscape that guides a successful hunting and gathering party is germane to the pragmatic abduction needed to promote innovation in sport performance, leading to the inquisition of new questions and ways of resolving performance-preparation challenges. More specifically, exemplified through its transdisciplinarity, we propose that to hunt โnew ideasโ and gather translatable knowledge, sport science researchers and practitioners need to wayfind through uncharted regions located in new performance landscapes. It is through this process of navigation where individuals will deepen, enrich and grow current knowledge, โtaking homeโ new ideas as they find their way
Fiber-coupled Antennas for Ultrafast Coherent Terahertz Spectroscopy in Low Temperatures and High Magnetic Fields
For the purposes of measuring the high-frequency complex conductivity of
correlated-electron materials at low temperatures and high magnetic fields, a
method is introduced for performing coherent time-domain terahertz spectroscopy
directly in the cryogenic bore of existing dc and pulsed magnets. Miniature
fiber-coupled THz emitters and receivers are constructed and are demonstrated
to work down to 1.5 Kelvin and up to 17 Tesla, for eventual use in higher-field
magnets. Maintaining the sub-micron alignment between fiber and antenna during
thermal cycling, obtaining ultrafast (~fs) optical gating pulses at the
end of long optical fibers, and designing highly efficient devices that work
well with low-power optical gating pulses constitute the major technical
challenges of this project. Data on a YBCO superconducting thin film and a high
mobility 2D electron gas is shown.Comment: 8 pages, 9 figure
Contributors to the June Issue/Notes
Notes by Henry S. Romano, William C. Malone, Joseph F. Rudd, Leonard D. Bodkin, James D. Sullivan, Robert J. Callahan, Jr., William Meehan, Alphonse Spahn, Robert E. Sullivan, John F. Power, Francis J. Paulson, John Merryman, J. Barrett Guthrie, Robert T. Fanning, Robert T. Stewart, and R. L. Miller
Contributors to the June Issue/Notes
Notes by Henry S. Romano, William C. Malone, Joseph F. Rudd, Leonard D. Bodkin, James D. Sullivan, Robert J. Callahan, Jr., William Meehan, Alphonse Spahn, Robert E. Sullivan, John F. Power, Francis J. Paulson, John Merryman, J. Barrett Guthrie, Robert T. Fanning, Robert T. Stewart, and R. L. Miller
Cisplatin-induced emesis: systematic review and meta-analysis of the ferret model and the effects of 5-HT3 receptor antagonists
PURPOSE: The ferret cisplatin emesis model has been used for ~30ย years and enabled identification of clinically used anti-emetics. We provide an objective assessment of this model including efficacy of 5-HT(3) receptor antagonists to assess its translational validity. METHODS: A systematic review identified available evidence and was used to perform meta-analyses. RESULTS: Of 182 potentially relevant publications, 115 reported cisplatin-induced emesis in ferrets and 68 were included in the analysis. The majority (nย =ย 53) used a 10ย mgย kg(โ1) dose to induce acute emesis, which peaked after 2ย h. More recent studies (nย =ย 11) also used 5ย mgย kg(โ1), which induced a biphasic response peaking at 12ย h and 48ย h. Overall, 5-HT(3) receptor antagonists reduced cisplatin (5ย mgย kg(โ1)) emesis by 68% (45โ91%) during the acute phase (day 1) and by 67% (48โ86%) and 53% (38โ68%, all Pย <ย 0.001), during the delayed phase (days 2, 3). In an analysis focused on the acute phase, the efficacy of ondansetron was dependent on the dosage and observation period but not on the dose of cisplatin. CONCLUSION: Our analysis enabled novel findings to be extracted from the literature including factors which may impact on the applicability of preclinical results to humans. It reveals that the efficacy of ondansetron is similar against low and high doses of cisplatin. Additionally, we showed that 5-HT(3) receptor antagonists have a similar efficacy during acute and delayed emesis, which provides a novel insight into the pharmacology of delayed emesis in the ferret
Misalignments: Challenges in Cultivating Science Faculty with Education Specialties in Your Department
Science Faculty with Education Specialties (SFES) are increasingly being hired across the United States. However, little is known about the motivations for SFES hiring or the potential or actual impact of SFES. In the context of a recent national survey of US SFES, we investigated SFES perceptions about these issues. Strikingly, perceptions about reasons for hiring SFES were poorly aligned with perceptions about potential and actual contributions reported by SFES themselves, and the advice they extended to beginning SFES was varied. While preparation of future teachers and departmental teaching needs were common reasons offered for SFES hiring, the potential and actual contributions of SFES highlighted instead their roles as pedagogical resources and as contributors to curricular reform. Misalignments between SFES perceptions about what motivates SFES hiring and their perceptions of their most valuable contributions present challenges for those interested in maximizing the impact of SFES
Soap Froths and Crystal Structures
We propose a physical mechanism to explain the crystal symmetries found in
macromolecular and supramolecular micellar materials. We argue that the packing
entropy of the hard micellar cores is frustrated by the entropic interaction of
their brush-like coronas. The latter interaction is treated as a surface effect
between neighboring Voronoi cells. The observed crystal structures correspond
to the Kelvin and Weaire-Phelan minimal foams. We show that these structures
are stable for reasonable areal entropy densities.Comment: 4 pages, RevTeX, 2 included eps figure
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