2,605 research outputs found
trans-DiaquaÂbisÂ[2-(2-pyridÂyl)acetato-Îș2 N,O]nickel(II)
In the centrosymmetric title complex, [Ni(C7H6NO2)2(H2O)2], the NiII atom, located on an inversion center, is six-coordinated in a distorted octaÂhedral geometry defined by two N and four O atoms from the two chelating 2-(2-pyridÂyl)acetate ligands and two aqua ligands. The molÂecules form a three-dimensional framework by OâHâŻO hydrogen bonds and aromatic ÏâÏ stacking interÂactions, with a centroidâcentroid distance of 3.506â
(3)â
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ClockViz: Designing Public Visualization for Coping with Collective Stress in Teamwork
The intervention solutions for coping with collective stress have been neglected in interaction design because of limited scalability of the physiological measuring methods. This paper focuses on exploring visual biofeedback design for collective stress in the context of teamwork. We design ClockViz, an augmented reality installation overlaid with static or dynamic projection to visualize three different extents of collective stress on a clock. Results of a 16-participant study show that ClockViz is useful to provide biofeedback data, change their internal status, and increase their mindfulness. Based on the results, we also discussed the potential solutions to collective stress sensing for designers to apply into their interactive design intervention
TFNet: Exploiting Temporal Cues for Fast and Accurate LiDAR Semantic Segmentation
LiDAR semantic segmentation plays a crucial role in enabling autonomous
driving and robots to understand their surroundings accurately and robustly.
There are different types of methods, such as point-based, range-image-based,
polar-based, and hybrid methods. Among these, range-image-based methods are
widely used due to their efficiency. However, they face a significant challenge
known as the ``many-to-one'' problem caused by the range image's limited
horizontal and vertical angular resolution. As a result, around 20\% of the 3D
points can be occluded. In this paper, we present TFNet, a range-image-based
LiDAR semantic segmentation method that utilizes temporal information to
address this issue. Specifically, we incorporate a temporal fusion layer to
extract useful information from previous scans and integrate it with the
current scan. We then design a max-voting-based post-processing technique to
correct false predictions, particularly those caused by the ``many-to-one''
issue. We evaluated the approach on two benchmarks and demonstrate that the
post-processing technique is generic and can be applied to various networks. We
will release our code and models
Successful treatment of methemoglobinemia in an elderly couple with severe cyanosis: two case reports
INTRODUCTION: Methemoglobinemia should be considered in all cyanotic patients who remain unresponsive to oxygen therapy. Rapid diagnosis is very important in emergency cases. Here, we present the cases of two patients, a married couple, admitted to our hospital with methemoglobinemia after exposure to sodium nitrite. CASE PRESENTATION: Two patients, a married couple, presented with methemoglobinemia. The 72-year-old Taiwanese man and 68-year-old Taiwanese woman were referred to our hospital with dizziness and tachypnea. On examination, their mucous membranes were cyanotic, and their blood samples showed the classic âchocolate brownâ appearance. The man also reported having experienced twitching of his right arm for a few minutes before arrival at the hospital. The symptoms of both patients failed to improve in response to supplemental oxygen delivered via oxygen masks, although the arterial blood gas data of these patients were normal and their pulse oximetry showed oxyhemoglobin levels of approximately 85%. A carbon monoxide-oximeter showed that the manâs methemoglobin concentration was 48.3%, and the womanâs was 36.4%. Methylene blue (100mg) was administered intravenously to both patients, and their symptoms improved dramatically. They were admitted to the intensive care unit and discharged three days later, without neurological sequelae. CONCLUSION: Severe methemoglobinemia is a life-threatening condition and, if untreated, may result in death. Early diagnosis and appropriate antidotal treatment are crucial in treating this emergency situation
An evolutionary particle filter with the immune genetic algorithm for intelligent video target tracking
AbstractParticle filter algorithm is widely used for target tracking using video sequences, which is of great importance for intelligent surveillance applications. However, there is still much room for improvement, e.g. the so-called âsample impoverishmentâ. It is brought by re-sampling which aims to avoid particle degradation, and thus becomes the inherent shortcoming of the particle filter. In order to solve the problem of sample impoverishment, increase the number of meaningful particles and ensure the diversity of the particle set, an evolutionary particle filter with the immune genetic algorithm (IGA) for target tracking is proposed by adding IGA in front of the re-sampling process to increase particle diversity. Particles are regarded as the antibodies of the immune system, and the state of target being tracked is regarded as the external invading antigen. With the crossover and mutation process, the immune system produces a large number of new antibodies (particles), and thus the new particles can better approximate the true state by exploiting new areas. Regulatory mechanisms of antibodies, such as promotion and suppression, ensure the diversity of the particle set. In the proposed algorithm, the particle set optimized by IGA can better express the true state of the target, and the number of meaningful particles can be increased significantly. The effectiveness and robustness of the proposed particle filter are verified by target tracking experiments. Simulation results show that the proposed particle filter is better than the standard one in particle diversity and efficiency. The proposed algorithm can easily be extended to multiple objects tracking problems with occlusions
Guest Editorial: Social and human aspects of cyber-physical systems
open6siIn the vision of Industry 4.0, the new industrial revolution is a
revolution of cyber-physical systems, of which the Internet of
Things forms a key foundation that has a great impact on the way
people live, and the way businesses are organised. Cyber-physical
systems are often considered feedback systems that integrate
computation, networking, and physical processes, and more
recently with âhuman-in-the-loopâ as one of the key research
topics.
The advances in social computing have connected human-inthe-loop in cyber-social systems such as Facebook and Twitter,
while their social-physical activities are supported by the cyberphysical systems on or near their bodies and in their interconnected
environments. Cyber-physical systems become an integral part of
social-cyber-physical systems (SCPS) that weave into the sociotechnical fabric of human society. These hybrid systems, exhibiting
both continuous (in physical and social spaces) and discrete (in
cyberspaces) dynamic behaviour, give rise to not only new
opportunities but also new challenges in designing products and
services where human and technical aspects are massively
intertwined. This Special Issue aims to present state-of-the-art
research attempts and results on the topic of SCPS.openopenHu J.; Liang R.-H.; Shih C.-S.; Catala A.; Marcenaro L.; Osawa H.Hu, J.; Liang, R. -H.; Shih, C. -S.; CATALA MALLOFRE, Andreu; Marcenaro, L.; Osawa, H
Cytotoxic Effect of the Genus Sinularia Extracts on Human SCC25 and HaCaT Cells
Soft corals of the
genus Sinularia are being
increasingly adopted to treat a wide variety of
disease processes. However,
the mechanism underlying its activity against human oral cancer cells is poorly
understood. This study evaluates the cyototoxicity effects of the genus
Sinularia extracts (S.
grandilobata, S. parva, S. triangula, S. scabra,
S. nanolobata and S. gibberosa) by
SCC25 and HaCaT cells. The cell adhesion assay
indicates that extracts reduce the cell
attachment. Extracts exhibit a dose-dependent
cytotoxic effect using MTS assay.Treatment of extracts to observe
the morphological alterations in cells, membrane blebbing, nuclear condensation, and
apoptotic bodies is demonstrated. Flow cytometry shows that extracts
sensitized the cells in the G0/G1 and G2/M phases with a concomitant significantly increased sub-G1 fraction, suggesting cell death by apoptosis. Extracts
of the genus Sinularia thus apparently cause
apoptosis of SCC25 and HaCaT cells, and warrant further research
investigating the possible antioral cancer compounds in these
soft corals
Component manipulated magnetic anisotropy and damping in Heusler-like compound Co2+xFe1-xAl
The component dependence of the magnetocrystalline anisotropy and the damping has been investigated in epitaxial Heusler-like compound Co2+xFe1-xAl films grown by molecular beam epitaxy (MBE) with x = -0.4, -0.2, 0, 0.2, and 0.4. All the films show a component tunable four-fold magnetocrystalline anisotropy with the easy axis along [1 1 0] orientation. The time resolved magneto-optic Kerr effect measurements reveal that the damping constant can be tuned in a range of 0.0065-0.0156 with a minimum value of 0.0065 at x = -0.2. This work provides a new approach to manipulate the magnetic dynamic properties of Heusler alloy Co2FeAl by adjusting the proportion of Co and Fe
The variability of optical \feii emission in PG QSO 1700+518
It is found that \feii emission contributes significantly to the optical and
ultraviolet spectra of most active galactic nuclei. The origin of the
optical/UV \feii emission is still a question open to debate. The variability
of \feii would give clues to this origin. Using 7.5 yr spectroscopic monitoring
data of one Palomer-Green (PG) quasi-stellar object (QSO), PG 1700+518, with
strong optical \feii emission, we obtain the light curves of the continuum \lv,
\feii, the broad component of \hb, and the narrow component of \hb by the
spectral decomposition. Through the interpolation cross-correlation method, we
calculate the time lags for light curves of \feii, the total \hb, the broad
component of \hb, and the narrow component of \hb with respect to the continuum
light curve. We find that the \feii time lag in PG1700+518 is
days, and the \hb time lag cannot be determined. Assuming
that \feii and \hb emission regions follow the virial relation between the time
lag and the FWHM for the \hb and \feii emission lines, we can derive that the
\hb time lag is days. The \hb time lag calculated from the
empirical luminosity--size relation is 222 days, which is consistent with our
measured \feii time lag. Considering the optical \feii contribution, PG
1700+518 shares the same characteristic on the spectral slope variability as
other 15 PG QSOs in our previous work, i.e., harder spectrum during brighter
phase.Comment: 6 apges, ApJ, in pres
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