Oceania
Trashbot uses AI to sort recyclables – TechCrunch
There are a number of startups working to improve trash sorting with robots. AMP Robotics is near the top of the list, coupling a picker and a conveyor belt to sort materials in large, automated facilities. The technology aims to correct human shortcomings when it comes to recycling. Too often people either don't bother to separate trash, or simply don't understand where things go. Founded in 2015, CleanRobotics hopes to correct the issue at the point of disposal. The Colorado firm's flagship trashbot system uses on-board machine learning and robotic systems to sort materials from a single disposal point.
Learning to Infer Counterfactuals: Meta-Learning for Estimating Multiple Imbalanced Treatment Effects
Zhou, Guanglin, Yao, Lina, Xu, Xiwei, Wang, Chen, Zhu, Liming
We regularly consider answering counterfactual questions in practice, such as "Would people with diabetes take a turn for the better had they choose another medication?". Observational studies are growing in significance in answering such questions due to their widespread accumulation and comparatively easier acquisition than Randomized Control Trials (RCTs). Recently, some works have introduced representation learning and domain adaptation into counterfactual inference. However, most current works focus on the setting of binary treatments. None of them considers that different treatments' sample sizes are imbalanced, especially data examples in some treatment groups are relatively limited due to inherent user preference. In this paper, we design a new algorithmic framework for counterfactual inference, which brings an idea from Meta-learning for Estimating Individual Treatment Effects (MetaITE) to fill the above research gaps, especially considering multiple imbalanced treatments. Specifically, we regard data episodes among treatment groups in counterfactual inference as meta-learning tasks. We train a meta-learner from a set of source treatment groups with sufficient samples and update the model by gradient descent with limited samples in target treatment. Moreover, we introduce two complementary losses. One is the supervised loss on multiple source treatments. The other loss which aligns latent distributions among various treatment groups is proposed to reduce the discrepancy. We perform experiments on two real-world datasets to evaluate inference accuracy and generalization ability. Experimental results demonstrate that the model MetaITE matches/outperforms state-of-the-art methods.
An Answer Verbalization Dataset for Conversational Question Answerings over Knowledge Graphs
Kacupaj, Endri, Singh, Kuldeep, Maleshkova, Maria, Lehmann, Jens
We introduce a new dataset for conversational question answering over Knowledge Graphs (KGs) with verbalized answers. Question answering over KGs is currently focused on answer generation for single-turn questions (KGQA) or multiple-tun conversational question answering (ConvQA). However, in a real-world scenario (e.g., voice assistants such as Siri, Alexa, and Google Assistant), users prefer verbalized answers. This paper contributes to the state-of-the-art by extending an existing ConvQA dataset with multiple paraphrased verbalized answers. We perform experiments with five sequence-to-sequence models on generating answer responses while maintaining grammatical correctness. We additionally perform an error analysis that details the rates of models' mispredictions in specified categories. Our proposed dataset extended with answer verbalization is publicly available with detailed documentation on its usage for wider utility.
The Importance of International Norms in Artificial Intelligence Ethics
DALL-E 2, an image-generating artificial intelligence (AI) has captured the public's attention with stunning portrayals of Godzilla-eating Tokyo and photorealistic images of astronauts riding horses in space. The model is the newest iteration of a text-to-image algorithm, an AI model that can generate images based on text descriptions. OpenAI, the company behind DALL-E 2, used a language model, GPT-3, and a computer vision model, CLIP, to train DALL-E 2 using 650 million images with associated text captions. The integration of these two models made it possible for OpenAI to train DALL-E 2 to generate a vast array of images in many different styles. Despite DALL-E 2's impressive accomplishments, there are significant issues with how the model portrays people and how it has acquired biases from the data it was trained on.
Promise and problems: AI put patients at risk but that shouldn't prevent us developing it. How do we implement artificial intelligence in clinical settings?
In a classic case of finding a balance between costs and benefits of science, researchers are grappling with the question of how artificial intelligence in medicine can and should be applied to clinical patient care – despite knowing that there are examples where it puts patients' lives at risk. The question was central to a recent university of Adelaide seminar, part of the Research Tuesdays lecture series, titled "Antidote AI." As artificial intelligence grows in sophistication and usefulness, we have begun to see it appearing more and more in everyday life. From AI traffic control and ecological studies, to machine learning finding the origins of a Martian meteorite and reading Arnhem Land rock art, the possibilities seem endless for AI research. The genuine excitement clinicians and artificial intelligence researchers feel for the prospect of AI assisting in patient care is palpable and honourable. Medicine is, after all, about helping people and the ethical foundation is "do no harm."
Amazon brings Echo Show 15's photo frame feature to all models
Amazon's Echo Show 15 comes with a digital photo frame picture that enables it to display only photos or artwork, uninterrupted by random Alexa skill suggestions, recipes or your schedule. Only the 15.6-inch had that feature, though -- until now. According to The Verge, the e-commerce giant has recently added its dedicated photo frame feature to all Echo Show Models in the US, the UK, Canada, Germany, France, Italy, Spain and Australia. The Verge says you can activate the slideshow by saying the voice command: "Alexa, start Photo Frame." Your smart display will then start a slideshow using the contents of your Amazon Photos and your Facebook account. It can also display a random selection of stock images if you've yet to upload your personal photos or have yet to link your accounts with the device.
RDA: Reciprocal Distribution Alignment for Robust Semi-supervised Learning
Duan, Yue, Qi, Lei, Wang, Lei, Zhou, Luping, Shi, Yinghuan
In this work, we propose Reciprocal Distribution Alignment (RDA) to address semi-supervised learning (SSL), which is a hyperparameter-free framework that is independent of confidence threshold and works with both the matched (conventionally) and the mismatched class distributions. Distribution mismatch is an often overlooked but more general SSL scenario where the labeled and the unlabeled data do not fall into the identical class distribution. This may lead to the model not exploiting the labeled data reliably and drastically degrade the performance of SSL methods, which could not be rescued by the traditional distribution alignment. In RDA, we enforce a reciprocal alignment on the distributions of the predictions from two classifiers predicting pseudo-labels and complementary labels on the unlabeled data. These two distributions, carrying complementary information, could be utilized to regularize each other without any prior of class distribution. Moreover, we theoretically show that RDA maximizes the input-output mutual information. Our approach achieves promising performance in SSL under a variety of scenarios of mismatched distributions, as well as the conventional matched SSL setting.
Response Component Analysis for Sea State Estimation Using Artificial Neural Networks and Vessel Response Spectral Data
Long, Nathan K., Sgarioto, Daniel, Garratt, Matthew, Sammut, Karl
The use of the `ship as a wave buoy analogy' (SAWB) provides a novel means to estimate sea states, where relationships are established between causal wave properties and vessel motion response information. This study focuses on a model-free machine learning approach to SAWB-based sea state estimation (SSE), using neural networks (NNs) to map vessel response spectral data to statistical wave properties for a small uninhabited surface vessel. Results showed a strong correlation between heave responses and significant wave height estimates, whilst the accuracy of mean wave period and wave heading predictions were observed to improve considerably when data from multiple vessel degrees of freedom (DOFs) was utilized. Overall, 3-DOF (heave, pitch and roll) NNs for SSE were shown to perform well when compared to existing SSE approaches that use similar simulation setups. One advantage of using small vessels for SAWB was shown as SSE accuracy was reasonable even when motion responses were low (in high-frequency, low wave height sea states). Given the information-dense statistical representation of vessel motion responses in spectral form, as well as the ability of NNs to effectively model complex relationships between variables, the designed SSE method shows promise for future adaptation to mobile SSE systems using the SAWB approach.
LM-CORE: Language Models with Contextually Relevant External Knowledge
Kaur, Jivat Neet, Bhatia, Sumit, Aggarwal, Milan, Bansal, Rachit, Krishnamurthy, Balaji
Large transformer-based pre-trained language models have achieved impressive performance on a variety of knowledge-intensive tasks and can capture factual knowledge in their parameters. We argue that storing large amounts of knowledge in the model parameters is sub-optimal given the ever-growing amounts of knowledge and resource requirements. We posit that a more efficient alternative is to provide explicit access to contextually relevant structured knowledge to the model and train it to use that knowledge. We present LM-CORE -- a general framework to achieve this -- that allows \textit{decoupling} of the language model training from the external knowledge source and allows the latter to be updated without affecting the already trained model. Experimental results show that LM-CORE, having access to external knowledge, achieves significant and robust outperformance over state-of-the-art knowledge-enhanced language models on knowledge probing tasks; can effectively handle knowledge updates; and performs well on two downstream tasks. We also present a thorough error analysis highlighting the successes and failures of LM-CORE.