23,372 research outputs found

    The Memory Palace:Telling the Story of the Interior

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    This book chapter originated as an invited keynote paper at the Interior Educators 'Interior Futures 'conference at Northumbria University in 2011. The paper was blind peer revwied for publication. The content of the paper represents a process of reflection on my practice as a writer and the designer of narrative structures and building stories, and in it, for the first time, I was able to articulate the relationship between the narrative structures of my first book 'The Secret Lives of Buildings' and my second 'The Memory Palace', explsoring how literary and spatial form can model one another. My invitation to speak at Interior Futures, the inaugural research conference of Interior Edcators, the UK wide interiors academic forum, is also the result of my role in the foundation of the Interiors Forum Scotland, which predated its UK wide successor by several years, and provided a model for this conference

    Joy2Learn User Feedback: Summary of Findings

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    This report is based on user research on the Joy2Learn website. This effort includes surveys and interviews with teachers in New York City and Los Angeles and LA-based teaching artists. This report provides a summary of their responses

    Detection of the simplest sugar, glycolaldehyde, in a solar-type protostar with ALMA

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    Glycolaldehyde (HCOCH2OH) is the simplest sugar and an important intermediate in the path toward forming more complex biologically relevant molecules. In this paper we present the first detection of 13 transitions of glycolaldehyde around a solar-type young star, through Atacama Large Millimeter Array (ALMA) observations of the Class 0 protostellar binary IRAS 16293-2422 at 220 GHz (6 transitions) and 690 GHz (7 transitions). The glycolaldehyde lines have their origin in warm (200-300 K) gas close to the individual components of the binary. Glycolaldehyde co-exists with its isomer, methyl formate (HCOOCH3), which is a factor 10-15 more abundant toward the two sources. The data also show a tentative detection of ethylene glycol, the reduced alcohol of glycolaldehyde. In the 690 GHz data, the seven transitions predicted to have the highest optical depths based on modeling of the 220 GHz lines all show red-shifted absorption profiles toward one of the components in the binary (IRAS16293B) indicative of infall and emission at the systemic velocity offset from this by about 0.2" (25 AU). We discuss the constraints on the chemical formation of glycolaldehyde and other organic species - in particular, in the context of laboratory experiments of photochemistry of methanol-containing ices. The relative abundances appear to be consistent with UV photochemistry of a CH3OH-CO mixed ice that has undergone mild heating. The order of magnitude increase in line density in these early ALMA data illustrate its huge potential to reveal the full chemical complexity associated with the formation of solar system analogs.Comment: Accepted for publication in ApJ Letter

    Overview of Swallow --- A Scalable 480-core System for Investigating the Performance and Energy Efficiency of Many-core Applications and Operating Systems

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    We present Swallow, a scalable many-core architecture, with a current configuration of 480 x 32-bit processors. Swallow is an open-source architecture, designed from the ground up to deliver scalable increases in usable computational power to allow experimentation with many-core applications and the operating systems that support them. Scalability is enabled by the creation of a tile-able system with a low-latency interconnect, featuring an attractive communication-to-computation ratio and the use of a distributed memory configuration. We analyse the energy and computational and communication performances of Swallow. The system provides 240GIPS with each core consuming 71--193mW, dependent on workload. Power consumption per instruction is lower than almost all systems of comparable scale. We also show how the use of a distributed operating system (nOS) allows the easy creation of scalable software to exploit Swallow's potential. Finally, we show two use case studies: modelling neurons and the overlay of shared memory on a distributed memory system.Comment: An open source release of the Swallow system design and code will follow and references to these will be added at a later dat

    Compressed Sensing for Tactile Skins

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    Whole body tactile perception via tactile skins offers large benefits for robots in unstructured environments. To fully realize this benefit, tactile systems must support real-time data acquisition over a massive number of tactile sensor elements. We present a novel approach for scalable tactile data acquisition using compressed sensing. We first demonstrate that the tactile data is amenable to compressed sensing techniques. We then develop a solution for fast data sampling, compression, and reconstruction that is suited for tactile system hardware and has potential for reducing the wiring complexity. Finally, we evaluate the performance of our technique on simulated tactile sensor networks. Our evaluations show that compressed sensing, with a compression ratio of 3 to 1, can achieve higher signal acquisition accuracy than full data acquisition of noisy sensor data.Comment: 8 pages, 4 figures, submitted to ICRA1

    IRAS 16293-2422: Evidence for Infall onto a Counter-Rotating Protostellar Accretion Disk

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    We report high spatial resolution VLA observations of the low-mass star-forming region IRAS 16293-2422 using four molecular probes: ethyl cyanide (CH3_3CH2_2CN), methyl formate (CH3_3OCHO), formic acid (HCOOH), and the ground vibrational state of silicon monoxide (SiO). Ethyl cyanide emiss ion has a spatial scale of 20\sim20'' and encompasses binary cores A and B as determined by continuum emission peaks. Surrounded by formic acid emission, methyl formate emission has a spatial scale of 6\sim6''and is confined to core B. SiO emission shows two velocity components with spatial scales less than 2'' that map 2\sim2'' northeast of the A and B symmetry axis. The redshifted SiO is 2\sim2'' northwest of blueshifted SiO along a position angle of 135o\sim135^o which is approximately parallel to the A and B symmetry axis. We interpret the spatial position offset in red and blueshifted SiO emission as due to rotation of a protostellar accretion disk and we derive \sim1.4 M_{\odot} interior to the SiO emission. In the same vicinity, Mundy et al. (1986) also concluded rotation of a nearly edge-on disk from OVRO observations of much stronger and ubiquitous 13^{13}CO emission but the direction of rotation is opposite to the SiO emission findings. Taken together, SiO and 13^{13}CO data suggest evidence for a counter-rotating disk. Moreover, archival BIMA array 12^{12}CO data show an inverse P Cygni profile with the strongest absorption in close proximity to the SiO emission, indicating unambiguous material infall toward the counter-rotating protostellar disk at a new source location within the IRAS 16293-2422 complex. The details of these observations and our interpretations are discussed.Comment: 18 pages, 5 figures, accepted for publication in the Astrophysical Journa

    Identified particle measurements at large transverse momenta from p+p to Au+Au collisions at RHIC

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    Measurements of various particle species over an extended momentum range provide a sensitive experimental tool for investigating particle production mechanisms in hadronic collisions. Comparison of the spectral shapes from different collision centralities measured with the STAR detector at RHIC allows one to study the interplay of soft and hard particle production for mesons and investigate various baryon-meson effects. Systematic studies of identified particle spectra for various colliding systems and different incident energies provide additional insights toward the interplay between fragmentation and non-fragmentation contributions to the particle production. In these proceedings we present a systematic study of transverse momentum spectra for charged pions, protons and antiprotons from Au+Au and Cu+Cu data at sqrt(s_NN)=200 and 62.4 GeV as a function of collision centrality. We compare those measurements with p+p and d+Au data, investigating the system effects on energy loss.Comment: 6 pages, 4 figures, proceedings for the Lake Louise Winter Institute 2007, 19th-24th February 2007, Alberta, Canad

    Community-Based Partnerships: Collaboration and Organizational Partnerships in Criminal Justice

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    This research examined a collaborative communitypractitioner partnership involving many justice and non-justice system agencies in Tarrant County, Texas. The study examined the challenges of a community-based partnership for solving jail overcrowding issues and the overincarceration of mentally ill individuals. This research involved working with the behavioral and mental health providers, substance abuse services providers, health services providers, police, prosecutors, defense attorneys, judges, sheriff’s office, county administration, court administration, jail staff, reentry services providers and organizations, victim services organizations, and so many more. In this paper the focus is on the importance of reducing conflict between entities that see themselves as in competition (removing adversarial components where possible), increasing communication between agencies and organizations, creating accountability for action, and managing the political terrain. We find that these elements combine to produce successful outcomes for communities and families as we focus on the justice system-involved population, their families, and their communities
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