265 research outputs found
Tracking REDD+ Finance: 2009-2012 - Finance Flows in Seven REDD+ Countries
Reducing Emissions from Deforestation and Forest Degradation (REDD). This REDDX report tracks the 2009-2012 flow of REDD+ finance from a variety of donors to seven tropical forest countries for various types of REDD+ activities. It is based on the hard work and dedication of seven teams of national partners and other experts who surveyed donors, government agencies, implementing agencies, NGOs, and consulting firms involved in the management of REDD+ finance in key REDD+ recipient countries
Look me in the eyes: A survey of eye and gaze animation for virtual agents and artificial systems
International audienceA person's emotions and state of mind are apparent in their face and eyes. As a Latin proverb states: "The face is the portrait of the mind; the eyes, its informers.". This presents a huge challenge for computer graphics researchers in the generation of artificial entities that aim to replicate the movement and appearance of the human eye, which is so important in human-human interactions. This State of the Art Report provides an overview of the efforts made on tackling this challenging task. As with many topics in Computer Graphics, a cross-disciplinary approach is required to fully understand the workings of the eye in the transmission of information to the user. We discuss the movement of the eyeballs, eyelids, and the head from a physiological perspective and how these movements can be modelled, rendered and animated in computer graphics applications. Further, we present recent research from psychology and sociology that seeks to understand higher level behaviours, such as attention and eye-gaze, during the expression of emotion or during conversation, and how they are synthesised in Computer Graphics and Robotics
Fabrication of low-cost, large-area prototype Si(Li) detectors for the GAPS experiment
A Si(Li) detector fabrication procedure has been developed with the aim of
satisfying the unique requirements of the GAPS (General Antiparticle
Spectrometer) experiment. Si(Li) detectors are particularly well-suited to the
GAPS detection scheme, in which several planes of detectors act as the target
to slow and capture an incoming antiparticle into an exotic atom, as well as
the spectrometer and tracker to measure the resulting decay X-rays and
annihilation products. These detectors must provide the absorption depth,
energy resolution, tracking efficiency, and active area necessary for this
technique, all within the significant temperature, power, and cost constraints
of an Antarctic long-duration balloon flight. We report here on the fabrication
and performance of prototype 2"-diameter, 1-1.25 mm-thick, single-strip Si(Li)
detectors that provide the necessary X-ray energy resolution of 4 keV for
a cost per unit area that is far below that of previously-acquired commercial
detectors. This fabrication procedure is currently being optimized for the
4"-diameter, 2.5 mm-thick, multi-strip geometry that will be used for the GAPS
flight detectors.Comment: Accepted for publication at Nuclear Instrumentation and Methods A, 12
pages, 11 figure
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Collapse of layer dimerization in the photo-induced hidden state of 1T-TaS2
Photo-induced switching between collective quantum states of matter is a fascinating rising field with exciting opportunities for novel technologies. Presently, very intensively studied examples in this regard are nanometer-thick single crystals of the layered material 1T-TaS2, where picosecond laser pulses can trigger a fully reversible insulator-to-metal transition (IMT). This IMT is believed to be connected to the switching between metastable collective quantum states, but the microscopic nature of this so-called hidden quantum state remained largely elusive up to now. Here, we characterize the hidden quantum state of 1T-TaS2Â by means of state-of-the-art x-ray diffraction and show that the laser-driven IMT involves a marked rearrangement of the charge and orbital order in the direction perpendicular to the TaS2-layers. More specifically, we identify the collapse of interlayer molecular orbital dimers as a key mechanism for this non-thermal collective transition between two truly long-range ordered electronic crystals
Large-area Si(Li) Detectors for X-ray Spectrometry and Particle Tracking for the GAPS Experiment
Large-area lithium-drifted silicon (Si(Li)) detectors, operable 150{\deg}C
above liquid nitrogen temperature, have been developed for the General
Antiparticle Spectrometer (GAPS) balloon mission and will form the first such
system to operate in space. These 10 cm-diameter, 2.5 mm-thick multi-strip
detectors have been verified in the lab to provide <4 keV FWHM energy
resolution for X-rays as well as tracking capability for charged particles,
while operating in conditions (~-40{\deg}C and ~1 Pa) achievable on a
long-duration balloon mission with a large detector payload. These
characteristics enable the GAPS silicon tracker system to identify cosmic
antinuclei via a novel technique based on exotic atom formation, de-excitation,
and annihilation. Production and large-scale calibration of ~1000 detectors has
begun for the first GAPS flight, scheduled for late 2021. The detectors
developed for GAPS may also have other applications, for example in heavy
nuclei identification
Assessment of tumor redox status through (S)-4-(3-[18F]fluoropropyl)-L-glutamic acid positron emission tomography imaging of system xc- activity
The cell's endogenous antioxidant system is vital to maintenance of redox homeostasis. Despite its central role in normal and pathophysiology, no non-invasive tools exist to measure this system in patients. The cystine/glutamate antiporter system xc- maintains the balance between intracellular reactive oxygen species and antioxidant production through the provision of cystine, a key precursor in glutathione biosynthesis. Here we show that tumor cell retention of a system xc--specific positron emission tomography radiotracer, (S)-4-(3-[18F]fluoropropyl)-L-glutamic acid ([18F]FSPG), decreases in proportion to levels of oxidative stress following treatment with a range of redox-active compounds. The decrease in [18F]FSPG retention correlated with a depletion of intracellular cystine resulting from increased de novo glutathione biosynthesis, shown through [U-13C6, U-15N2]cystine isotopic tracing. In vivo, treatment with the chemotherapeutic doxorubicin decreased [18F]FSPG tumor uptake in a mouse model of ovarian cancer, coinciding with markers of oxidative stress but preceding tumor shrinkage and decreased glucose utilization. Having already been used in pilot clinical trials, [18F]FSPG PET could be rapidly translated to the clinic as an early redox indicator of tumor response to treatment
Understandings of scientific inquiry: an international collaborative investigation of seventh grade students
Although understandings of scientific inquiry (as opposed to conducting inquiry) is included in science
education reform documents around the world, little is known about what students have learned about inquiry
during their primary school years. This is partially due to the lack of any assessment instrument to measure
understandings about scientific inquiry. However, a valid and reliable assessment has recently been developed
and published, Views About Scientific Inquiry (VASI) (Lederman J. et. al., 2014). The purpose of this large
scale (i.e., 19 countries spanning six continents and including 2,960 students) international project was to get
the first baseline data on what grade students have learned. The participating countries were: Australia,
Brazil, Canada, Chile, China, Egypt, England, Finland, France, Germany, Israel, New Zealand, Nigeria, South
Africa, Spain, Sweden, United States, Taiwan, and Turkey. In many countries, science is not formally taught
until middle school, which is the rationale for choosing seventh grade students for this investigation. This
baseline data will simultaneously provide information on what, if anything, students learn about inquiry in
primary school, as well as their beginning knowledge as they enter secondary school
Evaluation of Retinoblastoma and Ki-67 Immunostaining as Diagnostic Markers of Benign and Malignant Parathyroid Disease
RID="" ID="" Correspondence to: F. Farnebo, M.D., Ph.D.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/42410/1/268-23-1-68_23n1p68.pd
Pan-Cancer Analysis of lncRNA Regulation Supports Their Targeting of Cancer Genes in Each Tumor Context
Long noncoding RNAs (lncRNAs) are commonly dys-regulated in tumors, but only a handful are known toplay pathophysiological roles in cancer. We inferredlncRNAs that dysregulate cancer pathways, onco-genes, and tumor suppressors (cancer genes) bymodeling their effects on the activity of transcriptionfactors, RNA-binding proteins, and microRNAs in5,185 TCGA tumors and 1,019 ENCODE assays.Our predictions included hundreds of candidateonco- and tumor-suppressor lncRNAs (cancerlncRNAs) whose somatic alterations account for thedysregulation of dozens of cancer genes and path-ways in each of 14 tumor contexts. To demonstrateproof of concept, we showed that perturbations tar-geting OIP5-AS1 (an inferred tumor suppressor) andTUG1 and WT1-AS (inferred onco-lncRNAs) dysre-gulated cancer genes and altered proliferation ofbreast and gynecologic cancer cells. Our analysis in-dicates that, although most lncRNAs are dysregu-lated in a tumor-specific manner, some, includingOIP5-AS1, TUG1, NEAT1, MEG3, and TSIX, synergis-tically dysregulate cancer pathways in multiple tumorcontexts
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