584 research outputs found
MULTI-MODE AND SINGLE MODE POLYMER WAVEGUIDES AND STRUCTURES FOR SHORT-HAUL OPTICAL INTERCONNECTS
Single mode and multi-mode polymer optical waveguides are a viable solution for replacing copper interconnects as high speed and large bandwidth short-haul optical interconnects in next-generation supercomputers and data servers. A precision laser direct writing method is implemented for producing various single mode and multi-mode polymer waveguide structures and their performance is evaluated experimentally showing agreement with theoretically developed models. The laser direct writing method is the optimal solution for low-rate cost-effective prototyping and large area panel production.
A single mode polymer waveguide bridge module for silicon to glass optical fibers is designed, modeled, fabricated, and measured. The bridge module is designed for waveguide pitch control and low coupling loss from high-density silicon photonic interconnects within CMOS devices and optical silica fibers for long-haul low-loss transmission. A fan-out structure using waveguide S-bend structures is utilized to perform pitch control. Optical coupling within the bridge module is achieved through a novel polymer taper structure to reduce the numerical aperture mismatch between silicon waveguides and silica fibers. Research and development has been implemented into the theoretical understanding and experimental assessments of solving practical interconnect challenges for commercial realization of polymer waveguides
The Paradox of Massive Resistance: Political Conformity and Chaos in the Aftermath of Brown v. Board of Education
918-7 Limitations of Percutaneous Interventions in the Treatment of Bifurcation Lesions Involving the Left Anterior Descending Coronary Artery
Serious complications may occur when intervention is unsuccessful in bifurcation lesions involving the left anterior descending (LAD) and first major diagonal (D), because of the large amount of involved myocardium. To determine this complication rate, we reviewed 82 consecutive cases, over a 3 year period, in which these lesions were attempted. Sixty-six percent of the subjects were male, and 37% had unstable angina. The mean age was 59 and the mean ejection fraction was 56%. Digital calipers were used to measure vessel minimum lumen (MLD) and reference diameters. For the LAD the final MLD was 1.81mm and for the 0 1.32mm. The final percent mean diameter stenoses for the LAD and D were 41% and 45%, respectively. There were no significant differences in the rates of success or complication between groups treated with angioplasty only (N=68) or directional atherectomy (N=14). The in-hospital event-free success rate was 55%. The in-hospital complication rates were:Recurrent Ischemia16%Ventricular Tachycardia2%Myocardial Infarction14%Stroke2%Bypass Surgery12%Death1%Repeat Procedure4%Composite34%ConclusionLAD bifurcation lesion intervention is associated with a high in-hospital complication rate. Since these lesions are not amenable to stent placement or atherectomy with simultaneous protection of both vessels, these cases should be carefully evaluated before intervention, and bypass surgery should be considered as a treatment option
Adaptive Courseware Implementation: Investigating Alignment, Course Redesign, and the Student Experience
In this paper, four institutions share student and faculty feedback on the implementation of adaptive courseware through a common case study: biology for undergraduate non-majors. Additionally, each institution has provided a second case study of their choice. Together, researchers at Colorado State University in Fort Collins, CO, Portland State University in Portland, OR, University of Central Florida in Orlando, FL, and the University of Mississippi in Oxford, MS consider student perception of the benefits to the implementation of adaptive courseware, and how the deliberate alignment between adaptive courseware and course organization and structure impacts student experience. This paper highlights the collaboration of four public land grant Universities and includes data from thousands of students across the United States. Our findings indicate that adaptive blended courses with student engagement at the core multiplies opportunities afforded by emerging technologies within blended course design. This paper contributes multi-year data from four institutional approaches to implementing adaptive software to center student engagement
The Freshwater Mussels (Bivalvia:Unionidae) of the Fox River Basin, Illinois and Wisconsin
is peer reviewedOpe
Transcriptomics Identifies Modules of Differentially Expressed Genes and Novel Cyclotides in Viola pubescens
Viola is a large genus with worldwide distribution and many traits not currently exemplified in model plants including unique breeding systems and the production of cyclotides. Here we report de novo genome assembly and transcriptomic analyses of the non-model species Viola pubescens using short-read DNA sequencing data and RNA-Seq from eight diverse tissues. First, V. pubescens genome size was estimated through flow cytometry, resulting in an approximate haploid genome of 455 Mbp. Next, the draft V. pubescens genome was sequenced and assembled resulting in 264,035,065 read pairs and 161,038 contigs with an N50 length of 3,455 base pairs (bp). RNA-Seq data were then assembled into tissue-specific transcripts. Together, the DNA and transcript data generated 38,081 ab initio gene models which were functionally annotated based on homology to Arabidopsis thaliana genes and Pfam domains. Gene expression was visualized for each tissue via principal component analysis and hierarchical clustering, and gene co-expression analysis identified 20 modules of tissue-specific transcriptional networks. Some of these modules highlight genetic differences between chasmogamous and cleistogamous flowers and may provide insight into V. pubescens’ mixed breeding system. Orthologous clustering with the proteomes of A. thaliana and Populus trichocarpa revealed 8,531 sequences unique to V. pubescens, including 81 novel cyclotide precursor sequences. Cyclotides are plant peptides characterized by a stable, cyclic cystine knot motif, making them strong candidates for drug scaffolding and protein engineering. Analysis of the RNA-Seq data for these cyclotide transcripts revealed diverse expression patterns both between transcripts and tissues. The diversity of these cyclotides was also highlighted in a maximum likelihood protein cladogram containing V. pubescens cyclotides and published cyclotide sequences from other Violaceae and Rubiaceae species. Collectively, this work provides the most comprehensive sequence resource for Viola, offers valuable transcriptomic insight into V. pubescens, and will facilitate future functional genomics research in Viola and other diverse plant groups
Corrigendum: Transcriptomics Identifies Modules of Differentially Expressed Genes and Novel Cyclotides in Viola pubescens
Disk-Jet Connection in the Radio Galaxy 3C 120
We present the results of extensive multi-frequency monitoring of the radio
galaxy 3C 120 between 2002 and 2007 at X-ray, optical, and radio wave bands, as
well as imaging with the Very Long Baseline Array (VLBA). Over the 5 yr of
observation, significant dips in the X-ray light curve are followed by
ejections of bright superluminal knots in the VLBA images. Consistent with
this, the X-ray flux and 37 GHz flux are anti-correlated with X-ray leading the
radio variations. This implies that, in this radio galaxy, the radiative state
of accretion disk plus corona system, where the X-rays are produced, has a
direct effect on the events in the jet, where the radio emission originates.
The X-ray power spectral density of 3C 120 shows a break, with steeper slope at
shorter timescale and the break timescale is commensurate with the mass of the
central black hole based on observations of Seyfert galaxies and black hole
X-ray binaries. These findings provide support for the paradigm that black hole
X-ray binaries and active galactic nuclei are fundamentally similar systems,
with characteristic time and size scales linearly proportional to the mass of
the central black hole. The X-ray and optical variations are strongly
correlated in 3C 120, which implies that the optical emission in this object
arises from the same general region as the X-rays, i.e., in the accretion
disk-corona system. We numerically model multi-wavelength light curves of 3C
120 from such a system with the optical-UV emission produced in the disk and
the X-rays generated by scattering of thermal photons by hot electrons in the
corona. From the comparison of the temporal properties of the model light
curves to that of the observed variability, we constrain the physical size of
the corona and the distances of the emitting regions from the central BH.Comment: Accepted for publication in the Astrophysical Journal. 28 pages, 21
figures, 2 table
Exile Vol. XXXIX No. 1
Title Page by Ellen Gurley \u2793 i
Epigraph by Ezra Poind ii
Table of Contents iii-iv
Remaining a Soldier by Kristin Kruse \u2793 1-2
Vietnam War Memorial by Brooke MacKaye 3
We both ride in back by Chris Macaluso \u2793 4
Artwork by Jamie Oliver \u2794 5
Liberal Dirge #1 by Charis Brummitt \u2796 6-7
Artwork (anonymous) 7
Two ex-lovers and a dirty glass door by Chris Macaluso \u2793 8
The Salt of the Air by Kristen Padden \u2793 9-12
Artwork (anonymous) 13
Artwork by Ellen Gurley \u2793 14
Sun-Child by Jen Rudgers \u2796 15
Crazy Horse by Kevin Nix \u2794 16
The Fall of the Western Field by Rich Croft \u2793 17
In the Closet by Beth Widmaier \u2795 18
Winter Strawberries by Katy Rudder \u2793 19
Still Life (anonymous) 19
For This and Much Beyond This Poem by Matt Wanat \u2795 20-21
Artwork by Peggy Ryan \u2793 22
The Cycle Repeats: Apathy by Ishak Kang \u2793 23
The Judge by Ellen Gurley \u2793 24
Pear Colored by Erin Dempsey \u2793 25-26
4-Square by Trey Dunham \u2794 27
Artwork by Jamie Oliver \u2794 28
Ink & Heroine by Rich Croft \u2793 29
Figments by Craig Bowers \u2793 30-31
Malfi Coast (anonymous) 31
Suzanne (anonymous) 32
Hey Stella by Carey Chistie \u2795 33
Turning Leaves by Erin Lott \u2796 34-35
Reclining Nude (anonymous) 35
Blazon by Matt Wanat \u2795 36-37
Artwork by Holly Aikens \u2793 38
Awake by A. Fair \u2796 39
Dell the Barber by Kevin Nix \u2795 40
Artwork by Holly Aikens \u2793 40
Tree House by Katy Rudder \u2793 41-46
Jailbait by Ellison J. Stind \u2795 47
Mother by Charis Brummitt \u2796 48-49
Artwork by Bess Hammer \u2795 49
Private Origami by Trey Dunham \u2794 50
Among the Tendrils of Sleep by J. Trevett Allen \u2795 51
Poet of the Unforgiven by Carey Christie \u2795 52
Stuntman Steve by Andrew Zobay \u2793 53
sculpture by Lily Streett \u2794 53
Wonderings of an Adopted Son by Andy Heckert \u2793 54-55
Artwork by Holly Aikens \u2793 55
Odd Binge by C. N. Polumbus \u2793 56-57
Artwork by Holly Aikens \u2793 57
Artwork by Peggy Ryan \u2793; untitled by Jennifer Wendell \u2794 (superimposed) 58
Shadows of Pearl by Travis Brady \u2793 59-60
October/Rt. 161 by Annette Gallagher 61
Artwork by Jamie Oliver \u2794 61
The Influx by Craig Bowers \u2793 62
Artwork by Michael Norpell \u2794 63
editorial board 64
Editorial decision is shared equally among the Editorial Board. -64
Cover: Jamie Oliver -64
NOTE: With the exeption of Malfi Coast , all artwork listed as anonymous in the published table of contents appears to be signed by Ellen Gurley.
37th Yea
Melting, bubble-like expansion and explosion of superheated plasmonic nanoparticles
We report on time-resolved coherent diffraction imaging of gas-phase silver
nanoparticles, strongly heated via their plasmon resonance. The x-ray
diffraction images reveal a broad range of phenomena for different excitation
strengths, from simple melting over strong cavitation to explosive
disintegration. Molecular dynamics simulations fully reproduce this behavior
and show that the heating induces rather similar trajectories through the phase
diagram in all cases, with the very different outcomes being due only to
whether and where the stability limit of the metastable superheated liquid is
crossed.Comment: 17 pages, 8 figures (including supplemental material
- …