26419 research outputs found
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Peri-graft Sheath Anchor Technique for Target Vessel Cannulation in Fenestrated Aortic Repair
No full text
They Never Saw it Coming: Frames of Intimate Partner Homicide on Crime Science Investigation (CSI)
No full textPurpose
While portrayals of intimate partner homicide (IPH) in news media have been extensively studied, research on depictions of IPH in television crime dramas has been largely absent despite the fact that crime-dramas have a wide audience and have been shown to have a significant influence on viewers\u27 social attitudes.
Methods
We conduct a thematic content analysis of portrayals of intimate partner homicide across four seasons of the crime-drama Crime Scene Investigation (CSI) and compare these depictions to research on common warning signs and patterns of IPH.
Results
Similar to research on news media, CSI depicts IPH in ways that neglects socio-cultural and structural factors that could help identify contributing causes and barriers to prevention such as the common history of abuse, the prevalence of firearms, and the higher vulnerability of certain groups (e.g., women, racial minorities, low-SES individuals). However, the fictional nature of CSI allows for unique strategies of framing such as neglecting cultural scripts related to emotions that are frequently used to excuse IPH, specifically men\u27s emotional attachments.
Conclusions
This research advances this area of research by employing system justification theory to help explain the use of these frames, a theoretical framework that has largely been neglected in this area. We examine a heretofore understudied media form, crime dramas, and highlight how portrayals of IPH reinforce existing societal systems, obscuring the role of cultural scripts in these offenses, and masking the extent to which certain actions, services and policies, such as shelters or gun control policies, can prevent IPH
Solid Loading Effects on the Assembly of Alumina Particles in Aqueous Suspensions Due to the Dielectrophoretic Forces
No full textCurrent work in situ investigated the mechanisms of the interparticle interactions that evolve in dilute aqueous alumina suspensions subjected to alternating current (AC) electric field and the effects of solid loading of suspensions. The interactions were investigated for alumina suspension compositions in the 0.005‒0.04 vol.% solid loading range. Field‐induced interactions evolved via particle motion and dynamic assembly, chain formation parallel to the direction of the applied field and chain growth, chain cross‐linking, and chain thickening. The evolution time of each of those events was rapidly accelerated with solid loading. While chain cross‐linking was negligible in low solid loading suspensions, a dense network of thick chains evolved in higher solid loading suspensions. An important takeaway was that with the increasing solid loading, individual chains could only grow independently up to a comparable length in most of the suspensions but at a rapidly decreasing field duration. Solid loading effects originated due to the decrease in the interparticle distances and increase in the number of particles in a given volume with solid loading, increasing attractive dielectrophoretic (DEP) interaction forces and accelerating the interactions. Insights were shed into the role of AC field in the freeze‐casting of ceramics from concentrated suspensions
Out of Order and Causally Correct: Ready-Event Discovery Through Data-Dependence Analysis
No full textData-dependence analysis can identify causally-unordered events in a pending event set. The execution of these events is independent from all other scheduled events, making them ready for execution. These events can be executed out of order or in parallel. This approach may find and utilize more parallelism than spatial-decomposition parallelization methods, which are limited by the number of subdomains and by synchronization methods. This work provides formal definitions that use data-dependence analysis to find causally-unordered events and uses these definitions to measure parallelism in several discrete-event simulation models. A variant of the event-graph formalism is proposed, which assists with identifying ready events, by more clearly visualizing data dependencies between event types. Data dependencies between two event types may be direct or indirect, where the latter case considers the scheduling of intermediate events. Data dependencies and scheduling dependencies in a discrete-event simulation model are used to define time-interval limits that support the identification of events that are ready for execution. Experimental results from serial simulation testing demonstrate the availability of numerous events that are ready for execution, depending on model characteristics. The mean size of the ready-event set varies from about 1.5 to 110 for the tested models, depending on the model type, the size of the model, and delay distribution parameters. These findings support future work to develop a parallel capability to dynamically identify and execute ready events in a multi-threaded environment
T3-CIDERS: Train-the-Trainer and Community Building to Increase Cyberinfrastructure Adoption in Cybersecurity Research and Education
No full textT³-CIDERS is a train-the-trainer program to increase the adoption of advanced cyberinfrastructure (CI) and data skills into the fabric of research and education in cybersecurity and cyber-related disciplines. T³-CIDERS trains faculty, researchers, and students as “future trainers” (FTs) with hands-on technical and instructional skills to enable more people to effectively leverage CI in cybersecurity. The program includes a series of technical pre-training modules, a weeklong summer institute, ongoing learning engagements conducted over an academic year; it culminates with the FTs conducting locally tailored CI-infused training events at their respective home institutions. Ultimately, T³-CIDERS aims to build a “CI+cybersecurity” community of practice as the cohort continues to practice and teach CI skills in their teaching and research activities. This paper describes the vision and implementation of T³-CIDERS with the first cohort starting in year 2024. Based on the lessons learned through the in-person cohorts, a fully online program will be developed to expand the reach of T³-CIDERS to a broader audience. T³-CIDERS responds to the need to close the CI and data skill gap to meet the increasing challenges in securing the digital world
Spectra of Atoms and Molecules
No full textSpectra of Atoms and Molecules, the fifth edition of Peter F. Bernath\u27s popular textbook, provides advanced undergraduates and graduate students with a working knowledge of the field of spectroscopy. This volume illuminates fundamental principles of spectroscopy for chemists, physicists, astronomers, atmospheric scientists, and engineers, with the primary goal of teaching the interpretation of spectra. Highlights include an entirely new chapter on the spectroscopy of clouds and aerosols, as well as the presentation of group theory as needed to understand spectroscopy. Responding to reader requests, each chapter includes detailed worked examples, plus numerous challenging problems allowing the reader to work with actual experimental data and spectra. Bernath provides many diagrams and spectra which have been specifically recorded for this book. Topics include molecular symmetry, matrix representation of groups, quantum mechanics, and group theory. Atomic, rotational, vibrational, electronic and Raman spectra are analyzed as well. This edition clears up the confusing topic of line strengths as needed for quantitative applications. Spectra of Atoms and Molecules demystifies spectroscopy by showing readers derivations step-by-step to the final result.https://digitalcommons.odu.edu/chemistry_books/1005/thumbnail.jp
Novel Guidewire Technique for Paravalvular Leak Repair Following TAVR: A Case Report
No full textBackground:
Paravalvular leak (PVL) is a recognized complication following transcatheter aortic valve replacement (TAVR), associated with increased mortality, heart failure symptoms, and hemolytic anemia. Standard percutaneous PVL closure relies on crossing the defect with a 0.035-inch hydrophilic guidewire, followed by exchange for a stiffer wire to enable device delivery. However, traversing the defect can be technically challenging due to decreased maneuverability of the guidewire. We report a case of PVL repair using a modified 0.014-inch polymer-jacketed coronary guidewire and aspiration guidewire strategy that facilitated stable device deployment and complete leak closure.
Case Presentation and Management:
An 86-year-old woman with prior transfemoral TAVR presented with hemolytic anemia (haptoglobin \u3c 10 mg/dL, LDH 640 U/L) and recurrent transfusion needs. Transesophageal echocardiography revealed moderate anterior PVL between the left and right coronary cusps. CT confirmed suitability for closure. Under intracardiac and transesophageal echocardiographic guidance, right femoral venous and arterial access was obtained. The defect was crossed using a Sion Black wire, a 0.014-inch polymer jacket (PJ), non-tapered coronary guidewire. This was followed by a CatRX Aspiration Catheter to utilize Dual 0.014” and 0.038” lumens. This ensured secure wire access and confirmed that the wire tracked through the true regurgitant pathway rather than becoming trapped between the prosthetic valve and stent frame. This enabled formation of an outlet for delivery of an Amplatzer Vascular Plug 4. Post-deployment imaging confirmed complete occlusion and device stability, with improved aortic diastolic pressure and AR index.
Conclusion:
This case illustrates a successful, novel use of a 0.014-inch polymer-jacketed, non-tapered-tip coronary guidewire and outlines its future consideration in treatment of PVL from a prior TAVR
Polarized Positrons at CE⁺BAF
No full textA baseline concept for a continuous wave (CW) polarized positron injector was developed for the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab [1]. This concept is based on positron beam generation by a high current polarized electron beam (1 mA, 120 MeV, \u3e85% polarization) irradiating a rotating water-cooled tungsten target or liquid metal target. The update on the development of the Ce⁺BAF injector concept including the polarized electron source, the development of high power targets, simulations of positron capture, the design of the transport line from the positron injector to the CEBAF North Linac and the planned experiment to measure the upper limits of transverse and longitudinal emittances accepted by the 12 GeV CEBAF optics are presented.
[1] J. Grames et al., Positron beams at Ce⁺BAF in Proc. 14th Int. Particle Accelerator Conf. (IPAC’23), Venice, Italy, MOPL152, pp. 896–899 (2023). doi:10.18429/JACoW-IPAC2023-MOPL15
Investing in the Age of Generative AI: A GPT-Based Sentiment Analysis Approach
No full textGenerative AI, which ushers a new age of AI, comes with huge economic potential. To capitalize the AI boom, investors are interested in trading AI stocks. AI chatbots, which can identify and classify the sentiment from financial news, can be leveraged for investment. So, this paper proposes a GPT-based sentiment analysis approach for trading AI stocks. Also, natural experiments are conducted to evaluate its effectiveness. Initial results show that the approach achieves a good rate of return