4,631 research outputs found
ICP Enhanced HIPIMS System Design and Characterisation
A custom inductively coupled plasma assisted high-power impulse magnetron sputtering system was designed and assembled for the study of E x B plasma spoke instabilities. The magnetron plasma was characterized using time-resolved Langmuir probe, floating probe,
optical emission spectroscopy and high-speed camera methods. Fluctuations in the floating potential of the plasma were observed, this was attributed to localized rotating spokes. Localized spoke structures were observed in the camera footage, the shape and size of these spokes were found to be influenced by argon gas rarefaction
Real-time deep hair matting on mobile devices
Augmented reality is an emerging technology in many application domains.
Among them is the beauty industry, where live virtual try-on of beauty products
is of great importance. In this paper, we address the problem of live hair
color augmentation. To achieve this goal, hair needs to be segmented quickly
and accurately. We show how a modified MobileNet CNN architecture can be used
to segment the hair in real-time. Instead of training this network using large
amounts of accurate segmentation data, which is difficult to obtain, we use
crowd sourced hair segmentation data. While such data is much simpler to
obtain, the segmentations there are noisy and coarse. Despite this, we show how
our system can produce accurate and fine-detailed hair mattes, while running at
over 30 fps on an iPad Pro tablet.Comment: 7 pages, 7 figures, submitted to CRV 201
Table Search Using a Deep Contextualized Language Model
Pretrained contextualized language models such as BERT have achieved
impressive results on various natural language processing benchmarks.
Benefiting from multiple pretraining tasks and large scale training corpora,
pretrained models can capture complex syntactic word relations. In this paper,
we use the deep contextualized language model BERT for the task of ad hoc table
retrieval. We investigate how to encode table content considering the table
structure and input length limit of BERT. We also propose an approach that
incorporates features from prior literature on table retrieval and jointly
trains them with BERT. In experiments on public datasets, we show that our best
approach can outperform the previous state-of-the-art method and BERT baselines
with a large margin under different evaluation metrics.Comment: Accepted at SIGIR 2020 (Long
Optical nanofiber temperature monitoring via double heterodyne detection
Tapered optical fibers (nanofibers) whose diameters are smaller than the
optical wavelength are very fragile and can be easily destroyed if excessively
heated by energy dissipated from the transmitted light. We present a technique
for monitoring the nanofiber temperature using two-stage heterodyne detection.
The phase of the heterodyne output signal is determined by that of the
transmitted optical field, which, in turn, depends on the temperature through
the refractive index. From the phase data, by numerically solving the heat
exchange equations, the temperature distribution along the nanofiber is
determined. The technique is applied to the controlled heating of the nanofiber
by a laser in order to remove rubidium atoms adsorbed on its surface that
substantially degrade its transmission. Almost 90% of the nanofiber's original
transmission is recovered
Molecular mechanisms of action and potential biomarkers of growth inhibition of dasatinib (BMS-354825) on hepatocellular carcinoma cells
BACKGROUND: Molecular targeted therapy has emerged as a promising treatment of Hepatocellular carcinoma (HCC). One potential target is the Src family Kinase (SFK). C-Src, a non-receptor tyrosine kinase is a critical link of multiple signal pathways that regulate proliferation, invasion, survival, metastasis, and angiogenesis. In this study, we evaluated the effects of a novel SFK inhibitor, dasatinib (BMS-354825), on SFK/FAK/p130CAS, PI3K/PTEN/Akt/mTOR, Ras/Raf/MAPK and Stats pathways in 9 HCC cell lines. METHODS: Growth inhibition was assessed by MTS assay. EGFR, Src and downstream proteins FAK, Akt, MAPK42/44, Stat3 expressions were measured by western blot. Cell adhesion, migration and invasion were performed with and without dasatinib treatment. RESULTS: The IC(50) of 9 cell lines ranged from 0.7 μM ~ 14.2 μM. In general the growth inhibition by dasatinib was related to total Src (t-Src) and the ratio of activated Src (p-Src) to t-Src. There was good correlation of the sensitivity to dasatinib and the inhibition level of p-Src, p-FAK576/577 and p-Akt. No inhibition was found on Stat3 and MAPK42/44 in all cell lines. The inhibition of cell adhesion, migration and invasion were correlated with p-FAK inhibition. CONCLUSION: Dasatinib inhibits the proliferation, adhesion, migration and invasion of HCC cells in vitro via inhibiting of Src tyrosine kinase and affecting SFK/FAK and PI3K/PTEN/Akt, but not Ras/Raf/MEK/ERK and JAK/Stat pathways. T-Src and p-Src/t-Src may be useful biomarkers to select HCC patients for dasatinib treatment
Disease universe: Visualisation of population-wide disease-wide associations
We apply a force-directed spring embedding graph layout approach to
electronic health records in order to visualise population-wide associations
between human disorders as presented in an individual biological organism. The
introduced visualisation is implemented on the basis of the Google maps
platform and can be found at http://disease-map.net . We argue that the
suggested method of visualisation can both validate already known specifics of
associations between disorders and identify novel never noticed association
patterns.Comment: 4 pages (2 pics) the main paper + 8 pages (3 pics) Supplementary
Material
PC-CUBE: A Personal Computer Based Hypercube
PC-CUBE is an ensemble of IBM PCs or close compatibles connected in the hypercube topology with ordinary computer cables. Communication occurs at the rate of 115.2 K-band via the RS-232 serial links. Available for PC-CUBE is the Crystalline Operating System III (CrOS III), Mercury Operating System, CUBIX and PLOTIX which are parallel I/O and graphics libraries. A CrOS performance monitor was developed to facilitate the measurement of communication and computation time of a program and their effects on performance. Also available are CXLISP, a parallel version of the XLISP interpreter; GRAFIX, some graphics routines for the EGA and CGA; and a general execution profiler for determining execution time spent by program subroutines. PC-CUBE provides a programming environment similar to all hypercube systems running CrOS III, Mercury and CUBIX. In addition, every node (personal computer) has its own graphics display monitor and storage devices. These allow data to be displayed or stored at every processor, which has much instructional value and enables easier debugging of applications. Some application programs which are taken from the book Solving Problems on Concurrent Processors (Fox 88) were implemented with graphics enhancement on PC-CUBE. The applications range from solving the Mandelbrot set, Laplace equation, wave equation, long range force interaction, to WaTor, an ecological simulation
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