Government
Why Big Data Can Be the Enemy of New Ideas
Erik Larson, author of The Myth of Artificial Intelligence (Harvard 2021), explains the immense power using inductive logic on Big Data gave to Big Tech firms. Did Alan Turing's change of heart set AI on the wrong path? Erik Larson, author of The Myth of Artificial Intelligence, thinks Turing lost track of one really important way minds differ from machines. Much interaction between humans requires us to understand what is being said and it is not clear, Larson says, how to give AI that capability. Why Big Data can be the enemy of new ideas.
On some Foundational Aspects of Human-Centered Artificial Intelligence
Serafini, Luciano, Barbosa, Raul, Grosinger, Jasmin, Iocchi, Luca, Napoli, Christian, Rinzivillo, Salvatore, Robin, Jacques, Saffiotti, Alessandro, Scantamburlo, Teresa, Schueller, Peter, Traverso, Paolo, Vazquez-Salceda, Javier
The burgeoning of AI has prompted recommendations that AI techniques should be "human-centered". However, there is no clear definition of what is meant by Human Centered Artificial Intelligence, or for short, HCAI. This paper aims to improve this situation by addressing some foundational aspects of HCAI. To do so, we introduce the term HCAI agent to refer to any physical or software computational agent equipped with AI components and that interacts and/or collaborates with humans. This article identifies five main conceptual components that participate in an HCAI agent: Observations, Requirements, Actions, Explanations and Models. We see the notion of HCAI agent, together with its components and functions, as a way to bridge the technical and non-technical discussions on human-centered AI. In this paper, we focus our analysis on scenarios consisting of a single agent operating in dynamic environments in presence of humans.
End-to-End Autoencoder Communications with Optimized Interference Suppression
Davaslioglu, Kemal, Erpek, Tugba, Sagduyu, Yalin E.
An end-to-end communications system based on Orthogonal Frequency Division Multiplexing (OFDM) is modeled as an autoencoder (AE) for which the transmitter (coding and modulation) and receiver (demodulation and decoding) are represented as deep neural networks (DNNs) of the encoder and decoder, respectively. This AE communications approach is shown to outperform conventional communications in terms of bit error rate (BER) under practical scenarios regarding channel and interference effects as well as training data and embedded implementation constraints. A generative adversarial network (GAN) is trained to augment the training data when there is not enough training data available. Also, the performance is evaluated in terms of the DNN model quantization and the corresponding memory requirements for embedded implementation. Then, interference training and randomized smoothing are introduced to train the AE communications to operate under unknown and dynamic interference (jamming) effects on potentially multiple OFDM symbols. Relative to conventional communications, up to 36 dB interference suppression for a channel reuse of four can be achieved by the AE communications with interference training and randomized smoothing. AE communications is also extended to the multiple-input multiple-output (MIMO) case and its BER performance gain with and without interference effects is demonstrated compared to conventional MIMO communications.
Disentanglement and Generalization Under Correlation Shifts
Funke, Christina M., Vicol, Paul, Wang, Kuan-Chieh, Kรผmmerer, Matthias, Zemel, Richard, Bethge, Matthias
Correlations between factors of variation are prevalent in real-world data. Machine learning algorithms may benefit from exploiting such correlations, as they can increase predictive performance on noisy data. However, often such correlations are not robust (e.g., they may change between domains, datasets, or applications) and we wish to avoid exploiting them. Disentanglement methods aim to learn representations which capture different factors of variation in latent subspaces. A common approach involves minimizing the mutual information between latent subspaces, such that each encodes a single underlying attribute. However, this fails when attributes are correlated. We solve this problem by enforcing independence between subspaces conditioned on the available attributes, which allows us to remove only dependencies that are not due to the correlation structure present in the training data. We achieve this via an adversarial approach to minimize the conditional mutual information (CMI) between subspaces with respect to categorical variables. We first show theoretically that CMI minimization is a good objective for robust disentanglement on linear problems with Gaussian data. We then apply our method on real-world datasets based on MNIST and CelebA, and show that it yields models that are disentangled and robust under correlation shift, including in weakly supervised settings.
GPS: A Policy-driven Sampling Approach for Graph Representation Learning
Zhang, Tiehua, Liu, Yuze, Chen, Xin, Huang, Xiaowei, Zhu, Feng, Zheng, Xi
Graph representation learning has drawn increasing attention in recent years, especially for learning the low dimensional embedding at both node and graph level for classification and recommendations tasks. To enable learning the representation on the large-scale graph data in the real world, numerous research has focused on developing different sampling strategies to facilitate the training process. Herein, we propose an adaptive Graph Policy-driven Sampling model (GPS), where the influence of each node in the local neighborhood is realized through the adaptive correlation calculation. Specifically, the selections of the neighbors are guided by an adaptive policy algorithm, contributing directly to the message aggregation, node embedding updating, and graph level readout steps. We then conduct comprehensive experiments against baseline methods on graph classification tasks from various perspectives. Our proposed model outperforms the existing ones by 3%-8% on several vital benchmarks, achieving state-of-the-art performance in real-world datasets.
Explainability Is in the Mind of the Beholder: Establishing the Foundations of Explainable Artificial Intelligence
Explainable artificial intelligence and interpretable machine learning are research fields growing in importance. Yet, the underlying concepts remain somewhat elusive and lack generally agreed definitions. While recent inspiration from social sciences has refocused the work on needs and expectations of human recipients, the field still misses a concrete conceptualisation. We take steps towards addressing this challenge by reviewing the philosophical and social foundations of human explainability, which we then translate into the technological realm. In particular, we scrutinise the notion of algorithmic black boxes and the spectrum of understanding determined by explanatory processes and explainees' background knowledge. This approach allows us to define explainability as (logical) reasoning applied to transparent insights (into black boxes) interpreted under certain background knowledge - a process that engenders understanding in explainees. We then employ this conceptualisation to revisit the much disputed trade-off between transparency and predictive power and its implications for ante-hoc and post-hoc explainers as well as fairness and accountability engendered by explainability. We furthermore discuss components of the machine learning workflow that may be in need of interpretability, building on a range of ideas from human-centred explainability, with a focus on explainees, contrastive statements and explanatory processes. Our discussion reconciles and complements current research to help better navigate open questions - rather than attempting to address any individual issue - thus laying a solid foundation for a grounded discussion and future progress of explainable artificial intelligence and interpretable machine learning. We conclude with a summary of our findings, revisiting the human-centred explanatory process needed to achieve the desired level of algorithmic transparency.
Pacific Tic-Tac-Toe
The arrangement of lines in this image might look like an oceanic game of tic-tac-toe, but in fact, the grid can be explained by a relatively common atmospheric feature. Ship tracks are long, narrow clouds that form in the sky over the ocean when water vapor condenses around tiny particles in ship exhaust. The Visible Infrared Imaging Radiometer Suite (VIIRS) on the Suomi-NPP satellite acquired this image of ship tracks on December 7, 2021. On that day, the tracks revealed several shipping lanes intersecting in the waters off the Pacific coast of North America. Trails of aerosol pollution from ships are present with or without the clouds.
Intelligence, Artificial and Otherwise: Our Ruling Class
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Chinese farmers are using AI to keep tabs on their pigs
At least in China, anyway, where tech giant Alibaba is rolling out image- and sound-recognition software to help raise excellent porcine specimens. What it does: Quartz reports that Alibaba has built software that identifies pigs by markings on their bodies, tracking their physical activity and stats such as age and weight. Sound recognition can listen out for telltale signs of ill health. Some farms in China have a lot of pigs. Tequ, a Chinese agricultural firm that's teting out the technology, raises 10 million pigs a year.
Misuse of Artificial Intelligence in China
By 2030, China plans to become the world's leading country in artificial intelligence (AI). Beijing's AI development and implementation approach are fast-paced and pragmatic, with a focus on finding applications to help solve real-world problems. Several advances are being made in healthcare, such as "AI doctor" chatbots, machine learning for pharmaceutical research, and deep learning for medical image processing. Aside from this rapid development in artificial intelligence, China's AI policies are deeply troubling and deserve condemnation. Nevertheless, portraying China as a "villain" in this way may be overly simplistic and potentially costly.