Europe
Consequence-based Reasoning for Description Logics with Disjunction, Inverse Roles, Number Restrictions, and Nominals
Cucala, David Tena, Grau, Bernardo Cuenca, Horrocks, Ian
We present a consequence-based calculus for concept subsumption and classification in the description logic ALCHOIQ, which extends ALC with role hierarchies, inverse roles, number restrictions, and nominals. By using standard transformations, our calculus extends to SROIQ, which covers all of OWL 2 DL except for datatypes. A key feature of our calculus is its pay-as-you-go behaviour: unlike existing algorithms, our calculus is worst-case optimal for all the well-known proper fragments of ALCHOIQ, albeit not for the full logic.
CLAUDETTE: an Automated Detector of Potentially Unfair Clauses in Online Terms of Service
Lippi, Marco, Palka, Przemyslaw, Contissa, Giuseppe, Lagioia, Francesca, Micklitz, Hans-Wolfgang, Sartor, Giovanni, Torroni, Paolo
For instance, consumer protection agencies and/or consumer organisations may be involved to a different degree, there may or may not be fines for using unfair contractual terms, etc. (Schulte-Nölke et al 2008). One thing that all member states have in common is that if a business uses unfair terms in their contracts, in principle there is always a competent party with the authority to challenge such contracts. Unfortunately, the legal mechanism for enforcing the prohibition of unfair contract terms have failed to effectively counter this practice so far. As reported by some literature (Loos and Luzak 2016), and as our own research indicates (Micklitz et al 2017), unfair contractual terms are, as of today, widely used in ToS of online platforms. In our previous research (Micklitz et al 2017), we developed a theoretical model of tasks that human lawyers currently need to carry out, before starting the legal proceedings concerning the abstract control of fairness of clauses.
Lifted Neural Networks
Askari, Armin, Negiar, Geoffrey, Sambharya, Rajiv, Ghaoui, Laurent El
We describe a novel family of models of multi- layer feedforward neural networks in which the activation functions are encoded via penalties in the training problem. Our approach is based on representing a non-decreasing activation function as the argmin of an appropriate convex optimiza- tion problem. The new framework allows for algo- rithms such as block-coordinate descent methods to be applied, in which each step is composed of a simple (no hidden layer) supervised learning problem that is parallelizable across data points and/or layers. Experiments indicate that the pro- posed models provide excellent initial guesses for weights for standard neural networks. In addi- tion, the model provides avenues for interesting extensions, such as robustness against noisy in- puts and optimizing over parameters in activation functions.
How deep should be the depth of convolutional neural networks: a backyard dog case study
Gorban, A. N., Mirkes, E. M., Tukin, I. Y.
We present a straightforward non-iterative method for shallowing of deep Convolutional Neural Network (CNN) by combination of several layers of CNNs with Advanced Supervised Principal Component Analysis (ASPCA) of their outputs. We tested this new method on a practically important case of'friend-or-foe' face recognition. This is the backyard dog problem: the dog should (i) distinguish the members of the family from possible strangers and (ii) identify the members of the family. Our experiments revealed that the method is capable of drastically reducing the depth of deep learning CNNs, albeit at the cost of mild performance deterioration. 1. Introduction IT giants have produced many software "semiproducts" for image recognition. This new opportunity gave rise to many works in face recognition. These works and popular critics of their results prove that the performance of these systems are problem-depending and the devil is in the detail of testing and validation: the systems, which are almost perfect for one problem can be useless for another one. In this paper we focus on a problem which, on the one hand, appears to be a close relative of the face recognition applications and yet, on the other hand, is somewhat more relaxed.
audEERING's approach to the One-Minute-Gradual Emotion Challenge
Triantafyllopoulos, Andreas, Sagha, Hesam, Eyben, Florian, Schuller, Björn
Abstract-- This paper describes audEERING's submissions as well as additional evaluations for the One-Minute-Gradual (OMG) emotion recognition challenge. We provide the results for audio and video processing on subject (in)dependent evaluations. On the provided Development set, we achieved 0.343 Concordance Correlation Coefficient (CCC) for arousal (from audio) and.401 for valence (from video). I. INTRODUCTION The OMG dataset consists of 5288 (train: 2442, dev: 617, test: 2229) segments from YouTube videos of about 1-minute each, and the raters annotated some segments in each video on arousal (activation) [0..1] and valence [-1..1] dimensions. For the sake of consistency we mapped arousal also to [-1..1] range.
Simplified SPARQL REST API - CRUD on JSON Object Graphs via URI Paths
Schröder, Markus, Hees, Jörn, Bernardi, Ansgar, Ewert, Daniel, Klotz, Peter, Stadtmüller, Steffen
Within the Semantic Web community, SPARQL is one of the predominant languages to query and update RDF knowledge. However, the complexity of SPARQL, the underlying graph structure and various encodings are common sources of confusion for Semantic Web novices. In this paper we present a general purpose approach to convert any given SPARQL endpoint into a simple to use REST API. To lower the initial hurdle, we represent the underlying graph as an interlinked view of nested JSON objects that can be traversed by the API path.
When Will AI Exceed Human Performance? Evidence from AI Experts
Grace, Katja, Salvatier, John, Dafoe, Allan, Zhang, Baobao, Evans, Owain
Advances in artificial intelligence (AI) will have massive social consequences. Self-driving technology might replace millions of driving jobs over the coming decade. In addition to possible unemployment, the transition will bring new challenges, such as rebuilding infrastructure, protecting vehicle cyber-security, and adapting laws and regulations [5]. New challenges, both for AI developers and policy-makers, will also arise from applications in law enforcement, military technology, and marketing [6]. To prepare for these challenges, accurate forecasting of transformative AI would be invaluable. Several sources provide objective evidence about future AI advances: trends in computing hardware [7], task performance [8], and the automation of labor [9]. The predictions of AI experts provide crucial additional information [10, 11, 12]. We survey a large, representative sample of AI experts. Our questions cover the timing of AI advances (including both practical applications of AI and the automation of various human jobs), as well as the social and ethical impacts of AI.
Multi-Source Fusion Operations in Subjective Logic
van der Heijden, Rens Wouter, Kopp, Henning, Kargl, Frank
The purpose of multi-source fusion is to combine information from more than two evidence sources, or subjective opinions from multiple actors. For subjective logic, a number of different fusion operators have been proposed, each matching a fusion scenario with different assumptions. However, not all of these operators are associative, and therefore multi-source fusion is not well-defined for these settings. In this paper, we address this challenge, and define multi-source fusion for weighted belief fusion (WBF) and consensus & compromise fusion (CCF). For WBF, we show the definition to be equivalent to the intuitive formulation under the bijective mapping between subjective logic and Dirichlet evidence PDFs. For CCF, since there is no independent generalization, we show that the resulting multi-source fusion produces valid opinions, and explain why our generalization is sound. For completeness, we also provide corrections to previous results for averaging and cumulative belief fusion (ABF and CBF), as well as belief constraint fusion (BCF), which is an extension of Dempster's rule. With our generalizations of fusion operators, fusing information from multiple sources is now well-defined for all different fusion types defined in subjective logic. This enables wider applicability of subjective logic in applications where multiple actors interact.
Framewise approach in multimodal emotion recognition in OMG challenge
Sterling, Grigoriy, Belyaev, Andrey, Ryabov, Maxim
In this report we described our approach achieves $53\%$ of unweighted accuracy over $7$ emotions and $0.05$ and $0.09$ mean squared errors for arousal and valence in OMG emotion recognition challenge. Our results were obtained with ensemble of single modality models trained on voice and face data from video separately. We consider each stream as a sequence of frames. Next we estimated features from frames and handle it with recurrent neural network. As audio frame we mean short $0.4$ second spectrogram interval. For features estimation for face pictures we used own ResNet neural network pretrained on AffectNet database. Each short spectrogram was considered as a picture and processed by convolutional network too. As a base audio model we used ResNet pretrained in speaker recognition task. Predictions from both modalities were fused on decision level and improve single-channel approaches by a few percent
Two Techniques That Enhance the Performance of Multi-robot Prioritized Path Planning
Andreychuk, Anton, Yakovlev, Konstantin
We introduce and empirically evaluate two techniques aimed at enhancing the performance of multi-robot prioritized path planning. The first technique is the deterministic procedure for re-scheduling (as opposed to well-known approach based on random restarts), the second one is the heuristic procedure that modifies the search-space of the individual planner involved in the prioritized path finding.