191 research outputs found

    Accessibility and dimensionality: enhanced real time creative independence for digital musicians with quadriplegic cerebral palsy

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    Inclusive music activities for people with physical disabilities commonly emphasise facilitated processes, based both on constrained gestural capabilities, and on the simplicity of the available interfaces. Inclusive music processes employ consumer controllers, computer access tools and/or specialized digital musical instruments (DMIs). The first category reveals a design ethos identified by the authors as artefact multiplication -- many sliders, buttons, dials and menu layers; the latter types offer ergonomic accessibility through artefact magnification. We present a prototype DMI that eschews artefact multiplication in pursuit of enhanced real time creative independence. We reconceptualise the universal click-drag interaction model via a single sensor type, which affords both binary and continuous performance control. Accessibility is optimized via a familiar interaction model and through customized ergonomics, but it is the mapping strategy that emphasizes transparency and sophistication in the hierarchical correspondences between the available gesture dimensions and expressive musical cues. Through a participatory and progressive methodology we identify an ostensibly simple targeting gesture rich in dynamic and reliable features: (1) contact location; (2) contact duration; (3) momentary force; (4) continuous force, and; (5) dyad orientation. These features are mapped onto dynamic musical cues, most notably via new mappings for vibrato and arpeggio execution

    Justice John Marshall Harlan: Professor of Law

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    From 1889 to 1910, while serving on the United States Supreme Court, the first Justice John Marshall Harlan taught at the Columbian College of Law, which became the George Washington University School of Law. For two decades, he primarily taught working-class evening students in classes as diverse as property, torts, conflicts of law, jurisprudence, domestic relations, commercial law, evidence-and most significantly-constitutional law. Harlan\u27s lectures on constitutional law would have been lost to history, but for the enterprising initiative-and remarkable note-taking-of one of Harlan\u27s students, George Johannes. During the 1897-98 academic year, George Johannes and a classmate transcribed verbatim the twenty-seven lectures Justice Harlan delivered on constitutional law. In 1955, Johannes sent the transcripts to the second Justice Harlan. The papers were ultimately deposited in the Library of Congress. Though much attention has been given to the life and jurisprudence of Justice Harlan, his lectures have been largely ignored. Harlan\u27s lectures are a treasure trove of insights into his jurisprudence, as well as the state of constitutional law at the turn of the 20th century. They provide the unique opportunity to listen in as one of our greatest Justices lectures on the precipice of a constitutional revolution that he helped create. In this article, we use the lectures to paint a picture of who Justice Harlan was, what he believed, how he sought to impart that knowledge to the future lawyers of America, and how he predicted many of the changes in constitutional law that occurred during the 20th century. This article, published along with the annotated transcript of all twenty seven lectures and written on the centennial of Justice Harlan\u27s death, is a tribute to one of the giants of the law, and his contribution to legal education

    Justice John Marshall Harlan: Lectures on Constitutional Law, 1897-98

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    From 1889 to 1910, while serving on the United States Supreme Court, the first Justice John Marshall Harlan taught at the Columbian College of Law, which later became The George Washington School of Law. During the 1897–1898 academic year, one of Harlan’s students, George Johannes, along with a classmate, transcribed verbatim the twenty-seven lectures Justice Harlan delivered on constitutional law. In 1955, Johannes sent his copy of the transcripts to the second Justice Harlan, who eventually deposited them in the Library of Congress. To create this annotated transcript of Justice Harlan’s lectures, Professor Frye purchased a microfilm copy of Johannes’s transcription, made a PDF copy, and transcribed it verbatim by hand. The lectures were edited to preserve all of Harlan’s words as transcribed, except in cases of clear transcription error. Paragraph breaks and punctuation were added as necessary, in order to reflect the cadence of Harlan’s speech. References are provided for all quotations, and citations are provided for all cases and publications discussed by Harlan. Additional annotations are provided when supplemental information will help the reader better understand Harlan’s commentary. The editors of Arguendo at the George Washington Law Review dedicated the transcript to George Johannes, whose diligent note taking in Justice Harlan’s class secured these lectures to “ourselves and our Posterity.

    A Multi-Physics Study on High-Specific Power Li-O2 Batteries for Electric Aircraft

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    Commercialization of lithium-air batteries faces many challenges, such as electrolyte decomposition, short cycle life, low energy and power density, etc. However, commercialization of Li-O2 batteries for aeronautics is much more challenging due to additional safety constraints on cyclability and performance (high specific power and specific energy). For this presentation, we will discuss inter-related aspects of physics-based modeling of a pack: cell and battery model calibration. In addition, we will evaluate and present optimal battery designs for high discharge current density, high discharge time, and low battery mass using simulation-based optimization.The Finite Element Model (FEM) used to simulate a Li-O2 cell is based on the work of Bevara [1]. The different aspects of the model are based on: porous electrode theory and concentrated electrolyte theory; quantum tunneling model for the resistance of conformal layer of discharge product (Li2O2) [1]; Butler-Volmer kinetics for electrochemical reaction; Fick's diffusion for oxygen transport; and an oxygen dissolution model is applied at the air/electrolyte interface [2]. The electrolyte properties such as ion conductivity, ion diffusion, oxygen diffusion, and mass density of the electrolyte were taken from Molecular Dynamics (MD) simulations [3]; while the other model parameters, which includes mass of cell components, were calibrated to match experiments at high discharge current densities. The cell mass includes the anode, cathode, separator, electrolyte, and other components (such as current collector). This calibrated model is used to perform parametric studies on cathode thickness, porosity, tortuosity, carbon particle size, electrolyte transport and material properties, partial pressure of oxygen, discharge time, and discharge current density to study optimal designs for high specific power and energy. References:1. Bevara, V. & Andrei, P. (2014), J. Electrochem. Soc. 161 (14), A2068-A2079.2.Mehta, M. & Andrei, P. (2015), J. Power Sources. 286, 299-308.3.Liyana-Arachchi, T.; Haskins, J.; Burke, C.; Diederichsen, K.; McCloskey, B.; & Lawson, J. (2018), J. Phys. Chem. B. 122 (36), 8548 - 8559.4.Choi, W.; Kikumoto, H.; Choudhary, R. & Ooka, R. (2018), Applied Energy, 209, 306-321

    Act Now for Your Tomorrow: Final Report of the National Commission on Nursing Workforce for Long-Term Care

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    The nursing workforce shortage faced by long-term care providers stems from factors both outside and inside the organization and operation of long-term care services. The nursing shortage diminishes quality of care and increases the costs of providing services. Resolution of the long-term care nursing workforce challenge will require improvement of the recruitment and retention of nurses. The leadership for the efforts to improve the long-term care workforce must come from the community itself. New and sustained leadership for action by long-term care leaders is the critical factor necessary to the development of the recommended initiatives and the achievement of the goals of the National Commission on Nursing Workforce for Long-Term Care

    The annual Hajj pilgrimage-minimizing the risk of ill health in pilgrims from Europe and opportunity for driving the best prevention and health promotion guidelines.

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    Mass gatherings at religious events can pose major public health challenges, particularly the transmission of infectious diseases. Every year the Kingdom of Saudi Arabia (KSA) hosts the Hajj pilgrimage, the largest gathering held on an annual basis where over 2 million people come to KSA from over 180 countries. Living together in crowded conditions exposes the pilgrims and the local population to a range infectious diseases. Respiratory and gastrointestinal tract bacterial and viral infections can spread rapidly and affect attendees of mass gatherings. Lethal infectious disease outbreaks were common during Hajj in the 19th and 20th centuries although they have now been controlled to a great extent by the huge investments made by the KSA into public health prevention and surveillance programs. The KSA provides regular updated Hajj travel advice and health regulations through international public health agencies such as the WHO, Public Health England, the Centers for Disease Control and Prevention, and Hajj travel agencies. During the Hajj, an additional 25 000 health workers are deployed; there are eight hospitals in Makkah and Mina complete with state-of-the-art surgical wards and intensive care units made specifically available for pilgrims. All medical facilities offer high quality of care, and services are offered free to Hajj pilgrims to ensure the risks of ill health to all pilgrims and KSA residents are minimal. A summary of the key health issues that arise in pilgrims from Europe during Hajj and of the KSA Hajj guidelines, together with other factors that may play a role in reducing the risks to pilgrims and to wider global health security, is provided herein

    The Grizzly, April 20, 2017

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    Record Store Day Comes to Collegeville • Seismic Step Shares History and Tradition • Q&A with Incoming Music Professor • Jazzfest to Swing into Action Next Weekend • At the Intersection of Art and Meaning, Student Musicians Find Their Sound • Inside a Campus Tradition: The Story of the Heefner Organ • Opinions: Let More Life Carry You Through the Summer; Get it Together and Listen to Kendrick Lamar\u27s Album • UC Athletes Share the Best Pump-Up Music Before Competition • UC Baseball Captain Also Hitting the High Notes in a Capella Clubhttps://digitalcommons.ursinus.edu/grizzlynews/1667/thumbnail.jp

    Middle East Respiratory Syndrome Coronavirus (MERS-CoV) – a ten-year (2012-2022) global analysis of human and camel infections, genomic sequences, lineages, and geographical origins

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    OBJECTIVES:The World Health Organization priority zoonotic pathogen Middle East respiratory syndrome (MERS) coronavirus (CoV) has a high case fatality rate in humans and circulates in camels worldwide. METHODS: We performed a global analysis of human and camel MERS-CoV infections, epidemiology, genomic sequences, clades, lineages, and geographical origins for the period January 1, 2012 to August 3, 2022. MERS-CoV Surface gene sequences (4061 bp) were extracted from GenBank, and a phylogenetic maximum likelihood tree was constructed. RESULTS: As of August 2022, 2591 human MERS cases from 26 countries were reported to the World Health Organization (Saudi Arabia, 2184 cases, including 813 deaths [case fatality rate: 37.2%]) Although declining in numbers, MERS cases continue to be reported from the Middle East. A total of 728 MERS-CoV genomes were identified (the largest numbers were from Saudi Arabia [222: human = 146, camels = 76] and the United Arab Emirates [176: human = 21, camels = 155]). A total of 501 ‘S’-gene sequences were used for phylogenetic tree construction (camels [n = 264], humans [n = 226], bats [n = 8], other [n=3]). Three MERS-CoV clades were identified: clade B, which is the largest, followed by clade A and clade C. Of the 462 clade B lineages, lineage 5 was predominant (n = 177). CONCLUSION: MERS-CoV remains a threat to global health security. MERS-CoV variants continue circulating in humans and camels. The recombination rates indicate co-infections with different MERS-CoV lineages. Proactive surveillance of MERS-CoV infections and variants of concern in camels and humans worldwide, and development of a MERS vaccine, are essential for epidemic preparedness
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