475 research outputs found
Scalar Induced Gravitational Waves from Finslerian Inflation and Pulsar Timing Arrays Observations
The recent data from NANOGrav provide strong evidence of the existence of the
\acp{SGWB}. We investigate \acp{SIGW} from Finslerian inflation as a potential
source of stochastic gravitational wave background. Small-scale (1
Mpc) statistically anisotropic primordial scalar perturbations can be generated
in Finslerian inflation. The second order \acp{SIGW} from Finslerian inflation
are also anisotropic on small scales. After spatially averaging the small-scale
anisotropic \acp{SIGW}, we obtain the large-scale isotropic \acp{SGWB}. We find
that the parameters of small-scale anisotropic primordial power spectrum
generated by Finslerian inflation affect the \acp{PTA} observations of
large-scale isotropic gravitational wave background
Second order scalar perturbations induced by primordial curvature and tensor perturbations
The primordial perturbations will inevitably generate higher order
perturbations. We study the second order scalar perturbations generated by the
primordial curvature and tensor perturbations in the radiation-dominated era.
After presenting all the possible second-order source terms, we obtain the
explicit expressions of the kernel functions and the power spectra of the
second order scalar perturbations. The contributions from the initial
second-order perturbations are considered. We calculate the power spectra of
second order scalar perturbations for different tensor-to-scalar ratio
Color-complexity enabled exhaustive color-dots identification and spatial patterns testing in images
Targeted color-dots with varying shapes and sizes in images are first
exhaustively identified, and then their multiscale 2D geometric patterns are
extracted for testing spatial uniformness in a progressive fashion. Based on
color theory in physics, we develop a new color-identification algorithm
relying on highly associative relations among the three color-coordinates: RGB
or HSV. Such high associations critically imply low color-complexity of a color
image, and renders potentials of exhaustive identification of targeted
color-dots of all shapes and sizes. Via heterogeneous shaded regions and
lighting conditions, our algorithm is shown being robust, practical and
efficient comparing with the popular Contour and OpenCV approaches. Upon all
identified color-pixels, we form color-dots as individually connected networks
with shapes and sizes. We construct minimum spanning trees (MST) as spatial
geometries of dot-collectives of various size-scales. Given a size-scale, the
distribution of distances between immediate neighbors in the observed MST is
extracted, so do many simulated MSTs under the spatial uniformness assumption.
We devise a new algorithm for testing 2D spatial uniformness based on a
Hierarchical clustering tree upon all involving MSTs. Our developments are
illustrated on images obtained by mimicking chemical spraying via drone in
Precision Agriculture.Comment: 21 pages, 21 figure
NYCU-TWO at Memotion 3: Good Foundation, Good Teacher, then you have Good Meme Analysis
This paper presents a robust solution to the Memotion 3.0 Shared Task. The
goal of this task is to classify the emotion and the corresponding intensity
expressed by memes, which are usually in the form of images with short captions
on social media. Understanding the multi-modal features of the given memes will
be the key to solving the task. In this work, we use CLIP to extract aligned
image-text features and propose a novel meme sentiment analysis framework,
consisting of a Cooperative Teaching Model (CTM) for Task A and a Cascaded
Emotion Classifier (CEC) for Tasks B&C. CTM is based on the idea of knowledge
distillation, and can better predict the sentiment of a given meme in Task A;
CEC can leverage the emotion intensity suggestion from the prediction of Task C
to classify the emotion more precisely in Task B. Experiments show that we
achieved the 2nd place ranking for both Task A and Task B and the 4th place
ranking for Task C, with weighted F1-scores of 0.342, 0.784, and 0.535
respectively. The results show the robustness and effectiveness of our
framework. Our code is released at github.Comment: De-Factify 2: Second Workshop on Multimodal Fact Checking and Hate
Speech Detection, co-located with AAAI 202
The Effect of Financial Resources on Fertility: Evidence from Administrative Data on Lottery Winners
This paper utilizes wealth shocks from winning lottery prizes to examine the
effect of financial resources on fertility. Using administrative data on
Taiwanese lottery winners and a difference-in-differences design, we compare
the trend in fertility between households receiving lottery prizes of more than
1 million NT) with those winning less than 10,000 NT).
The results show that the receipt of a big lottery prize significantly
increases fertility, and effects are driven by households with less financial
resources. Moreover, big lottery wins mainly trigger childless households to
have children and induce people to get married earlier
Team Quotients, Resilience, and Performance of Software Development Projects
Past studies have examined actions and strategies that software project teams can take to reduce the negative impact of uncertainties, such as changing requirements. Software development project teams often have to be flexible to follow the pre-defined plans and strive to meet project goals. Sometimes uncertainty may go extreme to temporarily slow projects down and set project teams into reduced productivity. Project teams should be resilient to recover from the reduce productivity condition and move forward toward predefined goals. This study focuses on understanding the importance of team resilience for software project teams and exploring the antecedents of team resilience. Specifically, we investigate the impacts of intelligence and emotional quotient on team resilience capability, the extent to which project team can recover from the impediment and move forward. This is a research-in-progress work. A future empirical test plan has been discussed at the end
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