Oceania
Voice Recognition Still Has Significant Race and Gender Biases
Voice AI is becoming increasingly ubiquitous and powerful. Forecasts suggest that voice commerce will be an $80 billion business by 2023. Google reports that 20% of their searches are made by voice query today -- a number that's predicted to climb to 50% by 2020. In 2017, Google announced that their speech recognition had a 95% accuracy rate. While that's an impressive number, it begs the question: 95% accurate for whom?
Towards a Quantum-Like Cognitive Architecture for Decision-Making
Moreira, Catarina, Fell, Lauren, Dehdashti, Shahram, Bruza, Peter, Wichert, Andreas
We propose an alternative and unifying framework for decision-making that, by using quantum mechanics, provides more generalised cognitive and decision models with the ability to represent more information than classical models. This framework can accommodate and predict several cognitive biases reported in Lieder & Griffiths without heavy reliance on heuristics nor on assumptions of the computational resources of the mind. Expected utility theory and classical probabilities tell us what people should do if employing traditionally rational thought, but do not tell us what people do in reality (Machina, 2009). Under this principle, L&G propose an architecture for cognition that can serve as an intermediary layer between Neuroscience and Computation. Whilst instances where large expenditures of cognitive resources occur are theoretically alluded to, the model primarily assumes a preference for fast, heuristic-based processing.
Interpret Federated Learning with Shapley Values
Federated Learning is introduced to protect privacy by distributing training data into multiple parties. Each party trains its own model and a meta-model is constructed from the sub models. In this way the details of the data are not disclosed in between each party. In this paper we investigate the model interpretation methods for Federated Learning, specifically on the measurement of feature importance of vertical Federated Learning where feature space of the data is divided into two parties, namely host and guest. For host party to interpret a single prediction of vertical Federated Learning model, the interpretation results, namely the feature importance, are very likely to reveal the protected data from guest party. We propose a method to balance the model interpretability and data privacy in vertical Federated Learning by using Shapley values to reveal detailed feature importance for host features and a unified importance value for federated guest features. Our experiments indicate robust and informative results for interpreting Federated Learning models.
Assuring the Machine Learning Lifecycle: Desiderata, Methods, and Challenges
Ashmore, Rob, Calinescu, Radu, Paterson, Colin
Machine learning has evolved into an enabling technology for a wide range of highly successful applications. The potential for this success to continue and accelerate has placed machine learning (ML) at the top of research, economic and political agendas. Such unprecedented interest is fuelled by a vision of ML applicability extending to healthcare, transportation, defence and other domains of great societal importance. Achieving this vision requires the use of ML in safety-critical applications that demand levels of assurance beyond those needed for current ML applications. Our paper provides a comprehensive survey of the state-of-the-art in the assurance of ML, i.e. in the generation of evidence that ML is sufficiently safe for its intended use. The survey covers the methods capable of providing such evidence at different stages of the machine learning lifecycle, i.e. of the complex, iterative process that starts with the collection of the data used to train an ML component for a system, and ends with the deployment of that component within the system. The paper begins with a systematic presentation of the ML lifecycle and its stages. We then define assurance desiderata for each stage, review existing methods that contribute to achieving these desiderata, and identify open challenges that require further research.
A Probabilistic Framework for Location Inference from Social Media
Qian, Yujie, Tang, Jie, Yang, Zhilin, Huang, Binxuan, Wei, Wei, Carley, Kathleen M.
We study the extent to which we can infer users' geographical locations from social media. Location inference from social media can benefit many applications, such as disaster management, targeted advertising, and news content tailoring. The challenges, however, lie in the limited amount of labeled data and the large scale of social networks. In this paper, we formalize the problem of inferring location from social media into a semi-supervised factor graph model (SSFGM). The model provides a probabilistic framework in which various sources of information (e.g., content and social network) can be combined together. We design a two-layer neural network to learn feature representations, and incorporate the learned latent features into SSFGM. To deal with the large-scale problem, we propose a Two-Chain Sampling (TCS) algorithm to learn SSFGM. The algorithm achieves a good trade-off between accuracy and efficiency. Experiments on Twitter and Weibo show that the proposed TCS algorithm for SSFGM can substantially improve the inference accuracy over several state-of-the-art methods. More importantly, TCS achieves over 100x speedup comparing with traditional propagation-based methods (e.g., loopy belief propagation).
The Game of Tetris in Machine Learning
Algorta, Simรณn, ลimลek, รzgรผr
The game of Tetris is an important benchmark for research in artificial intelligence and machine learning. This paper provides a historical account of the algorithmic developments in Tetris and discusses open challenges. Handcrafted controllers, genetic algorithms, and reinforcement learning have all contributed to good solutions. However, existing solutions fall far short of what can be achieved by expert players playing without time pressure. Further study of the game has the potential to contribute to important areas of research, including feature discovery, autonomous learning of action hierarchies, and sample-efficient reinforcement learning.
These 20 social enterprises and nonprofits just won Google's AI Impact Challenge
American University of Beirut is developing a tool that farmers in the Middle East and Africa can use to irrigate fields at the optimum times to save water. At Colegio Mayor de Nuestra Seรฑora del Rosario, a university in Colombia, researchers will use satellite images to detect illegal mines that are polluting community drinking water. Crisis Text Line, a nonprofit that connects people experiencing a crisis with volunteer counselors by text message, uses AI to evaluate messages and move the people who are in most danger to the front of the line. In Australia, a public health service called Eastern Health will use AI to comb through clinical records from ambulances and find patterns in suicide attemptsโand ways to intervene earlier. Full Fact, an independent fact-checking organization in the U.K., is using AI to help human fact-checkers more quickly assess claims made by politicians and the media.
A Novel Adaptive Kernel for the RBF Neural Networks
Khan, Shujaat, Naseem, Imran, Togneri, Roberto, Bennamoun, Mohammed
Abstract--In this paper, we propose a novel adaptive kernel for the radial basis function (RBF) neural networks. In [12] a novel RBF network with the multi-kernel is proposed to obtain an optimized and I. INTRODUCTION The unknown centres of the multikernels The RBF neural networks have shown excellent performance are determined by an improved k-means clustering in a number of problems of practical interest. An orthogonal least squares (OLS) algorithm is reservoirs of brine are analyzed for physicochemical properties used to determine the remaining parameters. The convergence of the ACA is analyzed by the [3] the RBF kernel is used to predict the pressure gradient Lyapunov criterion. In the context of nuclear physics, RBF Cognitive Radial Basis Function network (McRBFN) and its has been effectively used to model the stopping power data Projection based Learning (PBL) referred to as PBL-McRBFN of materials as in [4].
Senator to introduce legislation banning video game 'loot boxes,' 'pay to win' features
King Digital Entertainment's'Candy Crush Saga' is seen being played on an Apple iPad Mini. A federal lawmaker wants to introduce legislation that would ban "pay to win" practices and "loot boxes" from all video games. In a statement released Wednesday, Sen. Josh Hawley, a Republican representing Missouri, said video games offering these systems are preying on user addiction, particularly among children. "When a game is designed for kids, game developers shouldn't be allowed to monetize addiction," said Hawley in a statement. "And when kids play games designed for adults, they should be walled off from compulsive microtransactions."
Adaptive neural network based dynamic surface control for uncertain dual arm robots
Pham, Dung Tien, Van Nguyen, Thai, Le, Hai Xuan, Nguyen, Linh, Thai, Nguyen Huu, Phan, Tuan Anh, Pham, Hai Tuan, Duong, Anh Hoai
For instance, dual arm manipulators have been effectively employed in a diversity of tasks including assembling a car, grasping and transporting an object or nursing the elderly [7]. In those scenarios, the DAR have been expected to behave like a human, which is they should be able to manipulate an object similarly to what a person does [3]. As compared to a single arm robot, the DAR have significant advantages such as more flexible movements, higher precision and greater dexterity for handling large objects [8, 9]. Nevertheless, since the kinematic and dynamic models of the DAR system are much more complicated than those of a single arm robot, it has more challenges to effectively and efficiently control the DAR, where synchronously coordinating the robot arms are highly expected. In order to accurately and stabily track the robot arms along desired trajectories, a number of the control strategies have been proposed. For instance, the traditional methods such as nonlinear feedback control [10] or hybrid force/position control relied on the kinematics and statics [11, 12] have been proposed to simultaneously control both of the arms. In the works [13, 14, 15], the authors have proposed to utilize the impedance control by considering the dynamic interaction between the robot and its surrounding environment while guaranteeing the desired movements. More importantly, robustness of the control performance is also highly prioritized in consideration of designing a controller for a highly uncertain and nonlinear DAR system. In literature of the modern control theory, sliding mode control (SMC) demonstrates a diverse ability to robustly control any system.