367 research outputs found
Unifying Training and Inference for Panoptic Segmentation
We present an end-to-end network to bridge the gap between training and
inference pipeline for panoptic segmentation, a task that seeks to partition an
image into semantic regions for "stuff" and object instances for "things". In
contrast to recent works, our network exploits a parametrised, yet lightweight
panoptic segmentation submodule, powered by an end-to-end learnt dense instance
affinity, to capture the probability that any pair of pixels belong to the same
instance. This panoptic submodule gives rise to a novel propagation mechanism
for panoptic logits and enables the network to output a coherent panoptic
segmentation map for both "stuff" and "thing" classes, without any
post-processing. Reaping the benefits of end-to-end training, our full system
sets new records on the popular street scene dataset, Cityscapes, achieving
61.4 PQ with a ResNet-50 backbone using only the fine annotations. On the
challenging COCO dataset, our ResNet-50-based network also delivers
state-of-the-art accuracy of 43.4 PQ. Moreover, our network flexibly works with
and without object mask cues, performing competitively under both settings,
which is of interest for applications with computation budgets.Comment: CVPR 202
In vivo activities of Baicalin against Chlamydia trachomatis
Our previous studies have shown that Baicalin could effectively inhibit Chlamydia trachomatis in vitro. In this study, Baicalin was tested for potential antichlamydial activity using a murine genital Chlamydia trachomatis infection model. It was demonstrated that Baicalin significantly reduced C. trachomatisloading in BALB/c mice that were vaginally infected with the pathogen. On the basis of these data and our previous observations, we concluded that further evaluation of Baicalin for prevention and treatment of sexually transmitted chlamydial infection is warranted
The single-cell gel electrophoresis assay to determine apoptosis induced by siRNA in Colo 320 cells
The aim of the present study was to determine if the pattern of DNA fragmentation determined by the single cell gel electrophoresis assay can be used to determine apoptosis induced by siRNA in Colo 320 cells. When the frequency of appearance of apoptotic cells following was observed over a period of time, there was a significant increase in appearance of apoptosis when using single cell gel electrophoresis assay. The present report demonstrates that the characteristic pattern of apoptotic comets detected by the comet assay corresponds to cells undergoing apoptosis
Edge Guided GANs with Semantic Preserving for Semantic Image Synthesis
We propose a novel Edge guided Generative Adversarial Network (EdgeGAN) for
photo-realistic image synthesis from semantic layouts. Although considerable
improvement has been achieved, the quality of synthesized images is far from
satisfactory due to two largely unresolved challenges. First, the semantic
labels do not provide detailed structural information, making it difficult to
synthesize local details and structures. Second, the widely adopted CNN
operations such as convolution, down-sampling and normalization usually cause
spatial resolution loss and thus are unable to fully preserve the original
semantic information, leading to semantically inconsistent results (e.g.,
missing small objects). To tackle the first challenge, we propose to use the
edge as an intermediate representation which is further adopted to guide image
generation via a proposed attention guided edge transfer module. Edge
information is produced by a convolutional generator and introduces detailed
structure information. Further, to preserve the semantic information, we design
an effective module to selectively highlight class-dependent feature maps
according to the original semantic layout. Extensive experiments on two
challenging datasets show that the proposed EdgeGAN can generate significantly
better results than state-of-the-art methods. The source code and trained
models are available at https://github.com/Ha0Tang/EdgeGAN.Comment: 40 pages, 29 figure
Contact printed Co/insulator/Co molecular junctions
The authors report the contact printing of a Au/Co double layer (total thickness ∼20–40nm) onto a self-assembled monolayer surface to form molecular junctions under ambient conditions. The feature size ranges from 50×50μm2 to 2×2 mm2. Grazing incident x-ray diffraction of the multilayer junction shows all expected Au peaks, while elemental Co was confirmed by energy dispersive spectroscopy. Film thickness, roughness, and density were characterized by x-ray reflectivity. I-V measurements show a prominent hysteresis, likely associated with charge trapping at the metal-organic interface, not an intrinsic feature of alkanedithiol molecules
Competition between ferromagnetic metallic and paramagnetic insulating phases in manganites
La0.67Ca0.33Mn1−xCuxO3(x=0 and 0.15) epitaxial thin films were grown on the (100) LaAlO3 substrates, and the temperature dependence of their resistivity was measured in magnetic fields up to 12 T by a four-probe technique. We found that the competition between the ferromagnetic metallic (FM) and paramagnetic insulating (PI) phases plays an important role in the observed colossal magnetoresistance(CMR) effect. Based on a scenario that the doped manganites approximately consist of phase-separated FM and PI regions, a simple phenomenological model was proposed to describe the CMR effect. Using this model, we calculated the resistivity as functions of temperature and magnetic field. The model not only qualitatively accounts for some main features related to the CMR effect, but also quantitatively agrees with the experimental observations
The effect of phase separation on charge ordering state in La12xCaxMnO3 (x ¼ 1/2, 2/3, and 3/4)
The magnetic phase separation characteristics are found in manganese perovskite La1/3Ca2/3MnO3 by electron spin resonance (ESR) and magnetization measurements. An extra resonance signal observed in ESR spectra just above the charge ordering (CO) temperature TCO provides strong evidence for the existence of ferromagnetic (FM) clusters near the CO state. The investigation of the resistivity of La1-xCaxMnO3 (x=1/2, 2/3, and 3/4) in different magnetic fields up to 14 T shows that the effect of magnetic fields on CO state decreases with increasing x. Our results indicate that the percolative characteristics of the phase separation between FM clusters and CO state for x=1/2 and 2/3 samples are related to the magnetic field dependence of CO state. However, for x=3/4 it is assumed that there are no obvious FM clusters in the CO phase
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Role overload, knowledge acquisition and job satisfaction: an ambidexterity perspective on boundary-spanning activities of IT employees
Building upon the ambidexterity perspective, this study conceptualizes boundary-spanning activities as both transactional and learning to illuminate their different effects on IT employees’ job satisfaction. Specifically, we offer an overarching theoretical framework rooted in ambidexterity by connecting the role theory and knowledge acquisition perspective to reconcile the inconsistency of extant findings. Role overload has a mediating effect on the relationship between boundary-spanning activities (both transactional and learning) and job satisfaction, whereas knowledge acquisition mediates the relationship between learning boundary-spanning activities and job satisfaction. Furthermore, high achievement motivation and learning goal orientation moderate the positive effect of learning boundary-spanning activities on job satisfaction. The quantitative analysis of IT employees in Chinese state-owned enterprises largely supports our hypotheses. We conclude this paper by discussing theoretical and managerial implications for ambidexterity, boundary spanning, and job satisfaction
Using fuzzy PROMETHEE to select countries for developmental Aid
Wealthy nations continue to demonstrate their unwavering support to improving conditions and the general well-being of poor countries in spite of the recent economic crises. However, as developmental aid relatively shrinks, both Aid donors and recipient countries have shown keen interest in methodologies used in evaluating developmental assistance programs. Evaluation of aid programs is seen as a complex task mainly because of the several non-aid factors that tend to affect overall outcomes. Adding to the complexity are the subjective sets of criteria used in Aid evaluations programs. This paper proposes a two stage framework of fuzzy TOPSIS and sensitivity analysis to demonstrate how aid-recipient countries can be evaluated to deepen transparency, fairness, value for money and sustainability of such aid programs. Using the Organisation for Economic Co-operation and Development (OECD) set of subjective criteria for evaluating aid programs; a numerical examplepre-defined by linguistic terms parameterized by triangular fuzzy numbers is provided to evaluate aid programs. Fuzzy PROMETHEE is used in the first stage to evaluate and rank aid-recipients followed by a comparative analysis with Fuzzy VIKOR and Fuzzy TOPSIS to ascertain an accurateness of the method used. A sensitivity analysis is further added that anticipates possible influences from lobbyists and examines the effect of that bias in expert ratings on the evaluation process. The result shows a framework that can be employed in evaluating aid effectiveness of recipient-countries
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