1,196 research outputs found
Somatic mutations render human exome and pathogen DNA more similar
Immunotherapy has recently shown important clinical successes in a
substantial number of oncology indications. Additionally, the tumor somatic
mutation load has been shown to associate with response to these therapeutic
agents, and specific mutational signatures are hypothesized to improve this
association, including signatures related to pathogen insults. We sought to
study in silico the validity of these observations and how they relate to each
other. We first addressed whether somatic mutations typically involved in
cancer may increase, in a statistically meaningful manner, the similarity
between common pathogens and the human exome. Our study shows that common
mutagenic processes increase, in the upper range of biologically plausible
frequencies, the similarity between cancer exomes and pathogen DNA at a scale
of 12-16 nucleotide sequences and established that this increased similarity is
due to the specific mutation distribution of the considered mutagenic
processes. Next, we studied the impact of mutation rate and showed that
increasing mutation rate generally results in an increased similarity between
the cancer exome and pathogen DNA, at a scale of 4-5 amino acids. Finally, we
investigated whether the considered mutational processes result in amino-acid
changes with functional relevance that are more likely to be immunogenic. We
showed that functional tolerance to mutagenic processes across species
generally suggests more resilience to mutagenic processes that are due to
exposure to elements of nature than to mutagenic processes that are due to
exposure to cancer-causing artificial substances. These results support the
idea that recognition of pathogen sequences as well as differential functional
tolerance to mutagenic processes may play an important role in the immune
recognition process involved in tumor infiltration by lymphocytes
The Sweet Efforts of Hershey\u27s Chocolate Corporation During WWII
Undergraduate
Textual or Investigativ
An Assessment if Institutional Relationships at the Olympic Coast National Marine Sanctuary
Collaborative and coordinated management is necessary for successful ecosystem
management, especially in marine ecosystems that cross jurisdictional lines. Agencies at
the state and federal level recognize the need for effective institutional relationships. The
Olympic Coast National Marine Sanctuary (OCNMS) identified collaborative and
coordinated management as a priority in its 2011 Final Management Plan and
Environmental Assessment. To reach its goal of achieving effective collaborative and
coordinated management, OCNMS commissioned an external assessment of its
institutional relationships. This assessment consisted of a literature review of standards
for measuring collaboration in natural resource contexts, interviews with OCNMS staff
and current key institutional partners, and a survey of individuals, organizations and
tribes that work with OCNMS. The assessment determined that OCNMS has built a
strong foundation for collaboration through two collaborative forums, projects and
policies that address important issues for partners, and positive interactions between
partners and OCNMS staff. Individuals feel they are working on issues important to their
organizations and for the most part they value opportunities to share their priorities and
learn about emerging issues, and they appreciate the efforts of OCNMS staff. Individuals
in the network of relationships represent a wide range of institutions with different
expectations for engagement and different criteria for what characterizes successful
collaboration. OCNMS has complex and sometimes strained relationships with the four
Coastal Treaty Tribes. OCNMS also faces challenges commonly found in other
collaborative processes – constraints on individuals’ time, shortages of funding and staff
support, communication challenges, and divergent goals among individuals. Still, the
relationships have enabled notable accomplishments that include regulations to protect
marine resources, joint projects related to research and education, and a ready network
for communication and feedback.Master of ScienceNatural Resources and EnvironmentUniversity of Michiganhttp://deepblue.lib.umich.edu/bitstream/2027.42/90863/1/OCNMSAssessment_FINAL2012.pd
Detecting Long-Duration Narrow-Band Gravitational Wave Transients Associated with Soft Gamma Repeater Quasi-Periodic Oscillations
We have performed an in-depth concept study of a gravitational wave data
analysis method which targets repeated long quasi-monochromatic transients
(triggers) from cosmic sources. The algorithm concept can be applied to
multi-trigger data sets in which the detector-source orientation and the
statistical properties of the data stream change with time, and does not
require the assumption that the data is Gaussian. Reconstructing or limiting
the energetics of potential gravitational wave emissions associated with
quasi-periodic oscillations (QPOs) observed in the X-ray lightcurve tails of
soft gamma repeater flares might be an interesting endeavour of the future.
Therefore we chose this in a simplified form to illustrate the flow,
capabilities, and performance of the method. We investigate performance aspects
of a multi-trigger based data analysis approach by using O(100 s) long
stretches of mock data in coincidence with the times of observed QPOs, and by
using the known sky location of the source. We analytically derive the PDF of
the background distribution and compare to the results obtained by applying the
concept to simulated Gaussian noise, as well as off-source playground data
collected by the 4-km Hanford detector (H1) during LIGO's fifth science run
(S5). We show that the transient glitch rejection and adaptive differential
energy comparison methods we apply succeed in rejecting outliers in the S5
background data. Finally, we discuss how to extend the method to a network
containing multiple detectors, and as an example, tune the method to maximize
sensitivity to SGR 1806-20 flare times.Comment: 11 pages, 8 figure
SLIDES: Taking the Long View: Doing Something About Climate Change
Presenter: Maggie Fox, President, America Votes, Boulder, CO.
Presenter: Susan Avery, Interim Provost and Executive Vice-Chancellor for Academic Affairs, University of Colorado.
Presenter: Roger Pielke, Jr., Professor, Environmental Studies, Center for Science and Technology Policy Research, University of Colorado.
4 slides
Senior Recital: David W. Reece, Tenor; Maggie Mooha, Piano/Harpsichord; April 25, 1976
Centennial East Recital HallSunday AfternoonApril 25, 19762:00 p.m
Harnessing Technology Schools Survey 2009: data report – part 1, descriptive analysis
This document, the data report, is a reference document which presents the data in tabular form for anyone who wants to examine the findings of the Harnessing Technology Schools Survey (HTSS) in depth, for example in relation to specific areas of technology or policy, or by school sector. The findings for each question are also set out by school sector by primary, secondary and special school sub-samples
Estimation of Bounds on Potential Outcomes For Decision Making
Estimation of individual treatment effects is commonly used as the basis for
contextual decision making in fields such as healthcare, education, and
economics. However, it is often sufficient for the decision maker to have
estimates of upper and lower bounds on the potential outcomes of decision
alternatives to assess risks and benefits. We show that, in such cases, we can
improve sample efficiency by estimating simple functions that bound these
outcomes instead of estimating their conditional expectations, which may be
complex and hard to estimate. Our analysis highlights a trade-off between the
complexity of the learning task and the confidence with which the learned
bounds hold. Guided by these findings, we develop an algorithm for learning
upper and lower bounds on potential outcomes which optimize an objective
function defined by the decision maker, subject to the probability that bounds
are violated being small. Using a clinical dataset and a well-known causality
benchmark, we demonstrate that our algorithm outperforms baselines, providing
tighter, more reliable bounds
Using the theory of planned behaviour to explore the multicultural nursing workforces' behavioural intentions to comply with nursing policies and procedures in Prince Military Medical City (PSMMC) in Kingdom of Saudi Arabia
Background & aims: mBarrett's esophagus (BE) increases risk for esophageal adenocarcinoma (EAC). Increased risk for BE has been associated with single nucleotide polymorphisms (SNPs) on chromosome 6p21 (within the HLA region) and on 16q23, where the closest protein-coding gene is FOXF1. The Barrett's and Esophageal Adenocarcinoma Consortium (BEACON) identified risk loci for BE and esophageal adenocarcinoma in CRTC1 and BARX1, and within 100 kb FOXP1. We aimed to identify SNPs that increased risk for BE in a genome-wide association study (GWAS) and to validate previously reported associations.Methods: we performed a GWAS to identify variants associated with BE and further analyzed promising variants identified by the BEACON. We performed genotype analysis of 10,158 patients with BE and 21,062 controls.Results: we identified 2 SNPs not previously associated with BE: rs3072 (2p24.1; odds ratio [OR] = 1.14; 95% CI: 1.09–1.18; P = 1.8 × 10?11) and rs2701108 (12q24.21; OR = 0.90; 95% CI: 0.86–0.93; P = 7.5 × 10?9). The closest protein-coding genes were GDF7 (rs3072), which encodes a ligand in the bone morphogenetic protein pathway, and TBX5 (rs2701108), which encodes a transcription factor that regulates esophageal and cardiac development. We also identified 3 SNPS already identified by the BEACON (rs2687201, rs11789015, and rs10423674). Meta-analysis of all data identified another SNP associated with BE and esophageal adenocarcinoma: rs3784262, near ALDH1A2 (OR = 0.90; 95% CI: 0.87–0.93; P = 3.72 × 10?9).Conclusions: we identified 2 loci associated with risk for BE and provide data to support a locus previously associated with risk in the BEACON. The genes we found to be associated with risk for BE encode transcription factors involved in thoracic, diaphragmatic, and esophageal development or proteins involved in the inflammatory respons
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