Nile Delta
Sea levels may be up to 4.9 feet HIGHER than we thought - leaving millions of homes at risk of being plunged underwater, study warns
ROTC students at Old Dominion subdued and killed ISIS-linked gunman who left one dead, two wounded after shouting'Allahu Akbar' and opened fire Horrifying next twist in the Alexander brothers case: MAUREEN CALLAHAN exposes an unthinkable perversion that's been hiding in plain sight Kentucky mother and daughter turn down $26.5MILLION to sell their farms to secretive tech giant that wants to build data center there Hollywood icon who starred in Psycho after Hitchcock dubbed her'my new Grace Kelly' looks incredible at 95 Kylie Jenner's total humiliation in Hollywood: Derogatory rumor leaves her boyfriend's peers'laughing at her' behind her back Tucker Carlson erupts at Trump adviser as she hurls'SLANDER' claim linking him to synagogue shooting Ben Affleck'scores $600m deal' with Netflix to sell his AI film start-up Long hair over 45 is ageing and try-hard. I've finally cut mine off. Alexander brothers' alleged HIGH SCHOOL rape video: Classmates speak out on sickening footage... as creepy unseen photos are exposed Heartbreaking video shows very elderly DoorDash driver shuffle down customer's driveway with coffee order because he is too poor to retire Amber Valletta, 52, was a '90s Vogue model who made movies with Sandra Bullock and Kate Hudson, see her now Model Cindy Crawford, 60, mocked for her'out of touch' morning routine: 'Nothing about this is normal' Sea levels may be up to 4.9 feet HIGHER than we thought - leaving millions of homes at risk of being plunged underwater, study warns READ MORE: Earth's oceans absorbed 23 ZETTAJOULES of heat in 2025 Sea levels could be up to 4.9 feet (1.5 metres) higher than scientists previously thought, a new study has warned, putting millions more people at risk from rising oceans. Earlier studies have relied on a rough estimate of the global sea level, which is actually far lower than the true water line in many places. The new findings indicate sea levels could be around 11 inches (28 cm) higher than expected in the UK and between 3.2 ft and 4.9 ft (1-1.5 metres) higher in parts of Southeast Asia .
- Asia > Southeast Asia (0.25)
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- Europe > Middle East > Malta > Port Region > Southern Harbour District > Valletta (0.24)
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BESTAnP: Bi-Step Efficient and Statistically Optimal Estimator for Acoustic-n-Point Problem
Sheng, Wenliang, Zhao, Hongxu, Chen, Lingpeng, Zeng, Guangyang, Shao, Yunling, Hong, Yuze, Yang, Chao, Hong, Ziyang, Wu, Junfeng
We consider the acoustic-n-point (AnP) problem, which estimates the pose of a 2D forward-looking sonar (FLS) according to n 3D-2D point correspondences. We explore the nature of the measured partial spherical coordinates and reveal their inherent relationships to translation and orientation. Based on this, we propose a bi-step efficient and statistically optimal AnP (BESTAnP) algorithm that decouples the estimation of translation and orientation. Specifically, in the first step, the translation estimation is formulated as the range-based localization problem based on distance-only measurements. In the second step, the rotation is estimated via eigendecomposition based on azimuth-only measurements and the estimated translation. BESTAnP is the first AnP algorithm that gives a closed-form solution for the full six-degree pose. In addition, we conduct bias elimination for BESTAnP such that it owns the statistical property of consistency. Through simulation and real-world experiments, we demonstrate that compared with the state-of-the-art (SOTA) methods, BESTAnP is over ten times faster and features real-time capacity in resource-constrained platforms while exhibiting comparable accuracy. Moreover, for the first time, we embed BESTAnP into a sonar-based odometry which shows its effectiveness for trajectory estimation.
- Asia > China > Shanghai > Shanghai (0.04)
- Asia > China > Guangdong Province > Shenzhen (0.04)
- Europe > Mediterranean Sea (0.04)
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Reducing False Discoveries in Statistically-Significant Regional-Colocation Mining: A Summary of Results
Ghosh, Subhankar, Gupta, Jayant, Sharma, Arun, An, Shuai, Shekhar, Shashi
Given a set \emph{S} of spatial feature types, its feature instances, a study area, and a neighbor relationship, the goal is to find pairs $<$a region ($r_{g}$), a subset \emph{C} of \emph{S}$>$ such that \emph{C} is a statistically significant regional-colocation pattern in $r_{g}$. This problem is important for applications in various domains including ecology, economics, and sociology. The problem is computationally challenging due to the exponential number of regional colocation patterns and candidate regions. Previously, we proposed a miner \cite{10.1145/3557989.3566158} that finds statistically significant regional colocation patterns. However, the numerous simultaneous statistical inferences raise the risk of false discoveries (also known as the multiple comparisons problem) and carry a high computational cost. We propose a novel algorithm, namely, multiple comparisons regional colocation miner (MultComp-RCM) which uses a Bonferroni correction. Theoretical analysis, experimental evaluation, and case study results show that the proposed method reduces both the false discovery rate and computational cost.
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Small-Variance Asymptotics for Exponential Family Dirichlet Process Mixture Models
Sampling and variational inference techniques are two standard methods for inference in probabilistic models, but for many problems, neither approach scales effectively to large-scale data. An alternative is to relax the probabilistic model into a non-probabilistic formulation which has a scalable associated algorithm. This can often be fulfilled by performing small-variance asymptotics, i.e., letting the variance of particular distributions in the model go to zero. For instance, in the context of clustering, such an approach yields connections between the k-means and EM algorithms. In this paper, we explore small-variance asymptotics for exponential family Dirichlet process (DP) and hierarchical Dirichlet process (HDP) mixture models. Utilizing connections between exponential family distributions and Bregman divergences, we derive novel clustering algorithms from the asymptotic limit of the DP and HDP mixtures that features the scalability of existing hard clustering methods as well as the flexibility of Bayesian nonparametric models. We focus on special cases of our analysis for discrete-data problems, including topic modeling, and we demonstrate the utility of our results by applying variants of our algorithms to problems arising in vision and document analysis.
- Asia > Middle East > Jordan (0.15)
- Europe > United Kingdom > England > Cambridgeshire > Cambridge (0.14)
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- Information Technology > Artificial Intelligence > Representation & Reasoning > Uncertainty > Bayesian Inference (0.88)
- Information Technology > Artificial Intelligence > Machine Learning > Learning Graphical Models > Directed Networks > Bayesian Learning (0.88)
- Information Technology > Artificial Intelligence > Machine Learning > Statistical Learning > Clustering (0.71)
Gemini Goes to Med School: Exploring the Capabilities of Multimodal Large Language Models on Medical Challenge Problems & Hallucinations
Pal, Ankit, Sankarasubbu, Malaikannan
Large language models have the potential to be valuable in the healthcare industry, but it's crucial to verify their safety and effectiveness through rigorous evaluation. For this purpose, we comprehensively evaluated both open-source LLMs and Google's new multimodal LLM called Gemini across Medical reasoning, hallucination detection, and Medical Visual Question Answering tasks. While Gemini showed competence, it lagged behind state-of-the-art models like MedPaLM 2 and GPT-4 in diagnostic accuracy. Additionally, Gemini achieved an accuracy of 61.45\% on the medical VQA dataset, significantly lower than GPT-4V's score of 88\%. Our analysis revealed that Gemini is highly susceptible to hallucinations, overconfidence, and knowledge gaps, which indicate risks if deployed uncritically. We also performed a detailed analysis by medical subject and test type, providing actionable feedback for developers and clinicians. To mitigate risks, we applied prompting strategies that improved performance. Additionally, we facilitated future research and development by releasing a Python module for medical LLM evaluation and establishing a dedicated leaderboard on Hugging Face for medical domain LLMs. Python module can be found at https://github.com/promptslab/RosettaEval
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- Health & Medicine > Therapeutic Area > Oncology (1.00)
- Health & Medicine > Therapeutic Area > Neurology (1.00)
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GRAM: Global Reasoning for Multi-Page VQA
Blau, Tsachi, Fogel, Sharon, Ronen, Roi, Golts, Alona, Ganz, Roy, Avraham, Elad Ben, Aberdam, Aviad, Tsiper, Shahar, Litman, Ron
The increasing use of transformer-based large language models brings forward the challenge of processing long sequences. In document visual question answering (DocVQA), leading methods focus on the single-page setting, while documents can span hundreds of pages. We present GRAM, a method that seamlessly extends pre-trained single-page models to the multi-page setting, without requiring computationally-heavy pretraining. To do so, we leverage a single-page encoder for local page-level understanding, and enhance it with document-level designated layers and learnable tokens, facilitating the flow of information across pages for global reasoning. To enforce our model to utilize the newly introduced document-level tokens, we propose a tailored bias adaptation method. For additional computational savings during decoding, we introduce an optional compression stage using our C-Former model, which reduces the encoded sequence length, thereby allowing a tradeoff between quality and latency. Extensive experiments showcase GRAM's state-of-the-art performance on the benchmarks for multi-page DocVQA, demonstrating the effectiveness of our approach.
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A systematic review of the use of Deep Learning in Satellite Imagery for Agriculture
Victor, Brandon, He, Zhen, Nibali, Aiden
Agricultural research is essential for increasing food production to meet the requirements of an increasing population in the coming decades. Recently, satellite technology has been improving rapidly and deep learning has seen much success in generic computer vision tasks and many application areas which presents an important opportunity to improve analysis of agricultural land. Here we present a systematic review of 150 studies to find the current uses of deep learning on satellite imagery for agricultural research. Although we identify 5 categories of agricultural monitoring tasks, the majority of the research interest is in crop segmentation and yield prediction. We found that, when used, modern deep learning methods consistently outperformed traditional machine learning across most tasks; the only exception was that Long Short-Term Memory (LSTM) Recurrent Neural Networks did not consistently outperform Random Forests (RF) for yield prediction. The reviewed studies have largely adopted methodologies from generic computer vision, except for one major omission: benchmark datasets are not utilised to evaluate models across studies, making it difficult to compare results. Additionally, some studies have specifically utilised the extra spectral resolution available in satellite imagery, but other divergent properties of satellite images - such as the hugely different scales of spatial patterns - are not being taken advantage of in the reviewed studies.
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Emergent AI-Assisted Discourse: Case Study of a Second Language Writer Authoring with ChatGPT
Jacob, Sharin, Tate, Tamara, Warschauer, Mark
The rapid proliferation of ChatGPT has incited debates regarding its impact on human writing. Amid concerns about declining writing standards, this study investigates the role of ChatGPT in facilitating academic writing, especially among language learners. Using a case study approach, this study examines the experiences of Kailing, a doctoral student, who integrates ChatGPT throughout their academic writing process. The study employs activity theory as a lens for understanding writing with generative AI tools and data analyzed includes semi-structured interviews, writing samples, and GPT logs. Results indicate that Kailing effectively collaborates with ChatGPT across various writing stages while preserving her distinct authorial voice and agency. This underscores the potential of AI tools such as ChatGPT to enhance academic writing for language learners without overshadowing individual authenticity. This case study offers a critical exploration of how ChatGPT is utilized in the academic writing process and the preservation of a student's authentic voice when engaging with the tool.
- North America > United States > California > Orange County > Irvine (0.14)
- North America > United States > New York (0.05)
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Insights into the drivers and spatio-temporal trends of extreme Mediterranean wildfires with statistical deep-learning
Richards, Jordan, Huser, Raphaël, Bevacqua, Emanuele, Zscheischler, Jakob
Extreme wildfires are a significant cause of human death and biodiversity destruction within countries that encompass the Mediterranean Basin. Recent worrying trends in wildfire activity (i.e., occurrence and spread) suggest that wildfires are likely to be highly impacted by climate change. In order to facilitate appropriate risk mitigation, we must identify the main drivers of extreme wildfires and assess their spatio-temporal trends, with a view to understanding the impacts of global warming on fire activity. We analyse the monthly burnt area due to wildfires over a region encompassing most of Europe and the Mediterranean Basin from 2001 to 2020, and identify high fire activity during this period in Algeria, Italy and Portugal. We build an extreme quantile regression model with a high-dimensional predictor set describing meteorological conditions, land cover usage, and orography. To model the complex relationships between the predictor variables and wildfires, we use a hybrid statistical deep-learning framework that can disentangle the effects of vapour-pressure deficit (VPD), air temperature, and drought on wildfire activity. Our results highlight that whilst VPD, air temperature, and drought significantly affect wildfire occurrence, only VPD affects wildfire spread. To gain insights into the effect of climate trends on wildfires in the near future, we focus on August 2001 and perturb temperature according to its observed trends (median over Europe: +0.04K per year). We find that, on average over Europe, these trends lead to a relative increase of 17.1\% and 1.6\% in the expected frequency and severity, respectively, of wildfires in August 2001, with spatially non-uniform changes in both aspects.
- Europe > Mediterranean Sea (0.44)
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- Europe > Portugal (0.25)
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- Information Technology > Artificial Intelligence > Machine Learning > Statistical Learning (1.00)
- Information Technology > Artificial Intelligence > Machine Learning > Neural Networks > Deep Learning (1.00)
- Information Technology > Artificial Intelligence > Machine Learning > Learning Graphical Models > Directed Networks > Bayesian Learning (0.45)
Men predicted to outnumber women in physics until the year 2158
The number of women authoring scientific papers is increasing, but men still dominate overall and some fields won't reach gender equity until the next century, according to a major analysis. Cassidy Sugimoto at the Georgia Institute of Technology in Atlanta and Vincent Larivière at the University of Montreal in Canada analysed nearly 5.5 million scientific papers published between 2008 and 2020, using a machine-learning algorithm to estimate the likelihood that a person's name belonged to a man or woman.
- North America > Canada > Quebec > Montreal (0.34)
- Africa > Middle East > Egypt > Nile Delta (0.34)