An investigation of volcanic depressions. Part 1 - Geologic and geophysical features of calderas Progress report

Preferred classification of calderas and volcano- tectonic depressions based on relative amounts of lava and proclastic eject

Charles Chesnutt Racial Relation Progression Throughout Career

Charles Chesnutt began his career with an ideology that race should not be a category in which to judge others. He felt that through literature he could help influence society and help create a less racial centric civilization. His career began with positive reviews from short story publications in multiple magazines. However, most critics and readers at the time did not know of Chesnutt\u27s racial background. It was not until his second collection of short stories that Chesnutt revealed the truth about his heritage. After his success with The Conjure Woman and The Wife of His Youth (both published in 1899), Chesnutt began to assert his political agenda more aggressively into his writing. His second novel The Marrow of Tradition (1901) received very poor reviews critics were repulsed by Chesnutt\u27s revolutionary philosophies concerning the racial caste system. The poor reception of Chesnutt\u27s three novels forced him to retire from a literary career. Years later, during the Harlem Renaissance, a time of prolific African American writers, Chesnutt was disappointed in the baseness of black characters in literature. He scolded Harlem Renaissance writers for their lack of strong black characters, but Chesnutt\u27s short stories that were published in The Crisis also lacked the racial uplift that he so desperately sought. Chesnutt\u27s intensity of racial relation literature had dwindled over time and he left it to the next generation of writers to fulfill the social agenda that his literature was never able to achiev

Charles Chesnutt Racial Relation Progression Throughout Career

Charles Chesnutt began his career with an ideology that race should not be a category in which to judge others. He felt that through literature he could help influence society and help create a less racial centric civilization. His career began with positive reviews from short story publications in multiple magazines. However, most critics and readers at the time did not know of Chesnutt\u27s racial background. It was not until his second collection of short stories that Chesnutt revealed the truth about his heritage. After his success with The Conjure Woman and The Wife of His Youth (both published in 1899), Chesnutt began to assert his political agenda more aggressively into his writing. His second novel The Marrow of Tradition (1901) received very poor reviews critics were repulsed by Chesnutt\u27s revolutionary philosophies concerning the racial caste system. The poor reception of Chesnutt\u27s three novels forced him to retire from a literary career. Years later, during the Harlem Renaissance, a time of prolific African American writers, Chesnutt was disappointed in the baseness of black characters in literature. He scolded Harlem Renaissance writers for their lack of strong black characters, but Chesnutt\u27s short stories that were published in The Crisis also lacked the racial uplift that he so desperately sought. Chesnutt\u27s intensity of racial relation literature had dwindled over time and he left it to the next generation of writers to fulfill the social agenda that his literature was never able to achiev

Funerary Iconography on an Infant Burial Jar from Ashkelon

The 2007 season of the Leon Levy Expedition to Ashkelon unearthed a remarkable intramural infant jar burial, bearing roughly incised images on both sides. While a number of intramural infant burials have been recovered from late twelfth–eleventh century levels at the site, this jar is the first burial to reveal anything about the funerary beliefs and rituals that might be associated with such practices. The iconography itself is unique within the Philistine milieu, as well as within the broader context of Syro-Palestinian funerary imagery, instead echoing Egyptian funerary motifs. After a brief discussion of the jar and its archaeological context we offer an interpretation of the burial jar’s iconography and explore its possible relationship to Egyptian funerary ritual

Oases: robust de novo RNA-seq assembly across the dynamic range of expression levels

Motivation: High-throughput sequencing has made the analysis of new model organisms more affordable. Although assembling a new genome can still be costly and difficult, it is possible to use RNA-seq to sequence mRNA. In the absence of a known genome, it is necessary to assemble these sequences de novo, taking into account possible alternative isoforms and the dynamic range of expression values

Pebble and Rock Band: Heuristic Resolution of Repeats and Scaffolding in the Velvet Short-Read de Novo Assembler

BACKGROUND: Despite the short length of their reads, micro-read sequencing technologies have shown their usefulness for de novo sequencing. However, especially in eukaryotic genomes, complex repeat patterns are an obstacle to large assemblies. PRINCIPAL FINDINGS: We present a novel heuristic algorithm, Pebble, which uses paired-end read information to resolve repeats and scaffold contigs to produce large-scale assemblies. In simulations, we can achieve weighted median scaffold lengths (N50) of above 1 Mbp in Bacteria and above 100 kbp in more complex organisms. Using real datasets we obtained a 96 kbp N50 in Pseudomonas syringae and a unique 147 kbp scaffold of a ferret BAC clone. We also present an efficient algorithm called Rock Band for the resolution of repeats in the case of mixed length assemblies, where different sequencing platforms are combined to obtain a cost-effective assembly. CONCLUSIONS: These algorithms extend the utility of short read only assemblies into large complex genomes. They have been implemented and made available within the open-source Velvet short-read de novo assembler

A guide to LIGO-Virgo detector noise and extraction of transient gravitational-wave signals

The LIGO Scientific Collaboration and the Virgo Collaboration have cataloged eleven confidently detected gravitational-wave events during the first two observing runs of the advanced detector era. All eleven events were consistent with being from well-modeled mergers between compact stellar-mass objects: black holes or neutron stars. The data around the time of each of these events have been made publicly available through the gravitational-wave open science center. The entirety of the gravitational-wave strain data from the first and second observing runs have also now been made publicly available. There is considerable interest among the broad scientific community in understanding the data and methods used in the analyses. In this paper, we provide an overview of the detector noise properties and the data analysis techniques used to detect gravitational-wave signals and infer the source properties. We describe some of the checks that are performed to validate the analyses and results from the observations of gravitational-wave events. We also address concerns that have been raised about various properties of LIGO-Virgo detector noise and the correctness of our analyses as applied to the resulting data

Optically targeted search for gravitational waves emitted by core-collapse supernovae during the first and second observing runs of advanced LIGO and advanced Virgo

We present the results from a search for gravitational-wave transients associated with core-collapse supernovae observed within a source distance of approximately 20 Mpc during the first and second observing runs of Advanced LIGO and Advanced Virgo. No significant gravitational-wave candidate was detected. We report the detection efficiencies as a function of the distance for waveforms derived from multidimensional numerical simulations and phenomenological extreme emission models. The sources with neutrino-driven explosions are detectable at the distances approaching 5 kpc, and for magnetorotationally driven explosions the distances are up to 54 kpc. However, waveforms for extreme emission models are detectable up to 28 Mpc. For the first time, the gravitational-wave data enabled us to exclude part of the parameter spaces of two extreme emission models with confidence up to 83%, limited by coincident data coverage. Besides, using ad hoc harmonic signals windowed with Gaussian envelopes, we constrained the gravitational-wave energy emitted during core collapse at the levels of 4.27×10-4 M·c2 and 1.28×10-1 M·c2 for emissions at 235 and 1304 Hz, respectively. These constraints are 2 orders of magnitude more stringent than previously derived in the corresponding analysis using initial LIGO, initial Virgo, and GEO 600 data

Mapping the strand-specific transcriptome of fission yeast

Pervasive genome-wide transcription is widespread in eukaryotic cells, but key features of the transcriptome have yet to be fully characterized. a new study using antibody-based detection of RNA-DNA duplexes on tiling arrays now reveals a complex, strand-specific transcriptional world in fission yeast

GW170817 : Observation of gravitational waves from a binary neutron star inspiral

On August 17, 2017 at 12∶41:04 UTC the Advanced LIGO and Advanced Virgo gravitational-wave detectors made their first observation of a binary neutron star inspiral. The signal, GW170817, was detected with a combined signal-to-noise ratio of 32.4 and a false-alarm-rate estimate of less than one per 8.0×104  years. We infer the component masses of the binary to be between 0.86 and 2.26  M⊙, in agreement with masses of known neutron stars. Restricting the component spins to the range inferred in binary neutron stars, we find the component masses to be in the range 1.17–1.60  M⊙, with the total mass of the system 2.74+0.04−0.01M⊙. The source was localized within a sky region of 28  deg2(90% probability) and had a luminosity distance of 40+8−14  Mpc, the closest and most precisely localized gravitational-wave signal yet. The association with the γ-ray burst GRB 170817A, detected by Fermi-GBM 1.7 s after the coalescence, corroborates the hypothesis of a neutron star merger and provides the first direct evidence of a link between these mergers and short γ-ray bursts. Subsequent identification of transient counterparts across the electromagnetic spectrum in the same location further supports the interpretation of this event as a neutron star merger. This unprecedented joint gravitational and electromagnetic observation provides insight into astrophysics, dense matter, gravitation, and cosmology