904 research outputs found
Malicious Markets and Forums: An Overview
No full textThis panel includes three presentations: “When the Public Seeks Anonymity Online” by Andrew M. Lindner; “Online Extremism in the U.S.” by James Hawdon; and “Malicious Markets and Forums: An Overview” by Eric Nunes.
The presentations were given as part of the conference "Understanding the Dark Web and Its Implications for Policy" held on May 18, 2018 at the Virginia Tech Executive Briefing Center in Arlington, Virginia.Virginia Tech. Department of Political ScienceVirginia Tech. Institute for Society, Culture, and EnvironmentVirginia Tech. National Capital RegionInfragardBluestone AnalyticsVirginia Tech. Integrated Security Destination AreaGovernment Technology & Services Coalitio
Time Out: National Perspectives on Sport and the Covid-19 Lockdown
No full textChapter 12: Why the NBA Shut Down First: How Partisan Polarization Informs Sports and Public Health, pp. 169-185 is written by University of Nebraska at Omaha professor Daniel N. Hawkins and Andrew M. Lindner. Access this chapter at https://digitalcommons.unomaha.edu/socanthfacpub/27/
In the edited collection Time Out: National Perspectives on Sport and the Covid-19 Lockdown, practitioners and international scholars explore the impact of the global Covid-19 health pandemic on sport from various local and national perspectives. It is part of a two-volume Covid-19 and Sport series that tackles the effects of the global lockdown on sport during March and April 2020, when restrictions were at their most severe and the human toll at its peak in many countries. The chapters provide a comprehensive overview of the immediate consequences of the Covid-19 lockdown on local and national sport. This book presents a variety of interdisciplinary perspectives in a total of twenty-two individual chapters, organized around four main themes. In the first two sections, the authors address the response by professional sports within national contexts. In section three, the authors explore the effects and responses of the Covid-19 lockdown on leisure and amateur sports. The final section assesses the effect of the pandemic on national policies and media.https://digitalcommons.unomaha.edu/socanthfacbooks/1001/thumbnail.jp
Dark sequential Z′ portal: Collider and direct detection experiments
No full textWe revisit the status of a Majorana fermion as a dark matter candidate when a sequential Z′ gauge boson dictates the dark matter phenomenology. Direct dark matter detection signatures rise from dark matter-nucleus scatterings at bubble chamber and liquid xenon detectors, and from the flux of neutrinos from the Sun measured by the IceCube experiment, which is governed by the spin-dependent dark matter-nucleus scattering. On the collider side, LHC searches for dilepton and monojet + missing energy signals play an important role. The relic density and perturbativity requirements are also addressed. By exploiting the dark matter complementarity we outline the region of parameter space where one can successfully have a Majorana dark matter particle in light of current and planned experimental sensitivities. © 2018 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the «https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3
Switching sliding mode control for a memberane strip with MFC actuators
No full textA switching sliding mode controller for the static shape control of a membrane strip is considered. The membrane strip is augmented with two macro fiber composite (MFC) bimorphs. MFC patches are modeled as monolithic piezoceramics. The combined structure is modeled as an Euler-Bernoulli beam under tensile load. The two bimorphs are actuated independently. One bimorph operates in bending, whereas the other bimorph operates in tension. The presence of the later causes the system to be nonlinear, hence the use of the sliding mode technique, and gives rise to a structural singularity. To evade this problem, a switching command is introduced. Hence, the closed loop system utilizes a hybrid control law, which can cause stability problems. Fortunately, the same Lyapunov function can be used to analyze the stability of both subsystems. Consequently, the switching is safe, and asymptotic stability is guaranteed. Simulation results are presented to demonstrate the efficacy of the switching slide mode controlle
Finiteness and children with specific language impairment: an exploratory study
No full textChildren with specific language impairment (SLI) are well known for their difficulties in mastering the inflectional paradigms; in the case of learning German they also have problems with the appropriate verb position, in particular with the verb in second position. This paper explores the possibilities of applying a broader concept of finiteness to data from children with SLI in order to put their deficits, or rather their skills, into a wider perspective. The concept, as developed by Klein (1998, 2000), suggests that finiteness is tied to the assertion that a certain state of affairs is valid with regard to some topic time; that is, finiteness relates the propositional content to the topic component. Its realization involves the interaction of various grammatical devices and, possibly, lexical means like temporal adverbs. Furthermore, in the acquisition of finiteness it has been found that scope particles play a major role in both first- and second-language learning. The purpose of this paper is to analyze to what extent three German-learning children with SLI have mastered these grammatical and lexical means and to pinpoint the phase in the development of finiteness they have reached. The data to be examined are mostly narrative and taken from conversations and experiments. It will be shown that each child chooses a different developmental path to come to grips with the interaction of these devices
The shape of the urine stream — from biophysics to diagnostics
No full textWe develop a new computational model of capillary-waves in free-jet flows, and apply this to the problem of urological diagnosis in this first ever study of the biophysics behind the characteristic shape of the urine stream as it exits the urethral meatus. The computational fluid dynamics model is used to determine the shape of a liquid jet issuing from a non-axisymmetric orifice as it deforms under the action of surface tension. The computational results are verified with experimental modelling of the urine stream. We find that the shape of the stream can be used as an indicator of both the flow rate and orifice geometry. We performed volunteer trials which showed these fundamental correlations are also observed in vivo for male healthy volunteers and patients undergoing treatment for low flow rate. For healthy volunteers, self estimation of the flow shape provided an accurate estimation of peak flow rate (+-2%). However for the patients, the relationship between shape and flow rate suggested poor meatal opening during voiding. The results show that self measurement of the shape of the urine stream can be a useful diagnostic tool for medical practitioners since it provides a non-invasive method of measuring urine flow rate and urethral dilation
R120G alphaB-crystallin promotes the unfolding of reduced alpha-lactalbumin and is inherently unstable
No full textThe definitive version is available at www.blackwell-synergy.comα‐Crystallin is the principal lens protein which, in addition to its structural role, also acts as a molecular chaperone, to prevent aggregation and precipitation of other lens proteins. One of its two subunits, αB‐crystallin, is also expressed in many nonlenticular tissues, and a natural missense mutation, R120G, has been associated with cataract and desmin‐related myopathy, a disorder of skeletal muscles [Vicart P, Caron A, Guicheney P, Li Z, Prevost MC, Faure A, Chateau D, Chapon F, Tome F, Dupret JM, Paulin D & Fardeau M (1998) Nat Genet20, 92–95]. In the present study, real‐time 1H‐NMR spectroscopy showed that the ability of R120G αB‐crystallin to stabilize the partially folded, molten globule state of α‐lactalbumin was significantly reduced in comparison with wild‐type αB‐crystallin. The mutant showed enhanced interaction with, and promoted unfolding of, reduced α‐lactalbumin, but showed limited chaperone activity for other target proteins. Using NMR spectroscopy, gel electrophoresis, and MS, we observed that, unlike the wild‐type protein, R120G αB‐crystallin is intrinsically unstable in solution, with unfolding of the protein over time leading to aggregation and progressive truncation from the C‐terminus. Light scattering, MS, and size‐exclusion chromatography data indicated that R120G αB‐crystallin exists as a larger oligomer than wild‐type αB‐crystallin, and its size increases with time. It is likely that removal of the positive charge from R120 of αB‐crystallin causes partial unfolding, increased exposure of hydrophobic regions, and enhances its susceptibility to proteolysis, thus reducing its solubility and promoting its aggregation and complexation with other proteins. These characteristics may explain the involvement of R120G αB‐crystallin with human disease states.Teresa M. Treweek, Agata Rekas, Robyn A. Lindner, Mark J. Walker, J. Andrew Aquilina, Carol V. Robinson, Joseph Horwitz, Ming Der Perng, Roy A. Quinlan, and John A. Carve
Honour and recognition in the German novel of banditry ca 1800
No full textThis article performs a reading informed by Honneth’s theory of recognition of the two best-known German novels of banditry of the 1790s, Johann Heinrich Zschokke’s Abaellino der große Bandit (1794) and Christian August Vulpius’ Rinaldo Rinaldini (1799) in an effort to understand how popular literature participates in and reflects upon the discourse on honour and recognition around 1800. Its status as popular genre makes the novel of banditry (Räuberroman) a potentially interesting source on shifts in the theory and practice of honour as experienced by ordinary Europeans at the turn of the 19th century. The genre was found to relate to the honour discourse not directly, but in the manner of a heterotopia, simultaneously located outside that discourse and referentially connected to it. Taken in isolation, the novel of banditry is not an informative source on the changing role of honour and new patterns of intersubjective recognition in late 18th century Europe. Seen as part of a particular constellation of textual production and reception, however, the genre sheds light on the aporias of honour experienced by those socially marginal ‘new readers’ intent on exploiting literature in the struggle for enhanced social recognition.Peer reviewe
Lactose intolerance and other related food sensitivities
No full textMilk and dairy food consumption can lead to a range of adverse clinical symptoms, the best known of which is lactose intolerance (LI). LI is defined as experiencing gastrointestinal symptoms following the ingestion of lactose. While LI is often caused by a genetically determined reduction of lactase production in adulthood, it is important to note that other causes exist. In addition, adverse gastrointestinal and other symptoms following milk and dairy food consumption may not necessarily be the result of LI. Despite our deeper understanding of food sensitivities and their overlap with irritable bowel syndrome, misattribution of gastrointestinal symptoms to lactose ingestion in self-reporting lactose-intolerant individuals remains common. In this chapter we discuss the complexities of lactose-related and lactose-independent adverse gastrointestinal and other symptoms associated with milk and dairy food consumption as well as the nutritional consequences of dairy food avoidance
- …
