14,528 research outputs found
Improving Statistical Language Model Performance with Automatically Generated Word Hierarchies
An automatic word classification system has been designed which processes
word unigram and bigram frequency statistics extracted from a corpus of natural
language utterances. The system implements a binary top-down form of word
clustering which employs an average class mutual information metric. Resulting
classifications are hierarchical, allowing variable class granularity. Words
are represented as structural tags --- unique -bit numbers the most
significant bit-patterns of which incorporate class information. Access to a
structural tag immediately provides access to all classification levels for the
corresponding word. The classification system has successfully revealed some of
the structure of English, from the phonemic to the semantic level. The system
has been compared --- directly and indirectly --- with other recent word
classification systems. Class based interpolated language models have been
constructed to exploit the extra information supplied by the classifications
and some experiments have shown that the new models improve model performance.Comment: 17 Page Paper. Self-extracting PostScript Fil
The Study of Clustering of Taiwanese Tourists\u27 Motivations to Hong Kong
Abstract
Driven by the political and economic forces of cross-strait, Taiwan has become one of the major source markets for Hong Kong tourism industry since 1987. The major purposes of this study were to investigate the following factors (1) The influential factors of travel motivation, (2) The clusters of travel motivations, (3) The marketing segmentation of clusters of Taiwanese tourists to visit Hong Kong. Through ten travel agents, self-report surveys were distributed to collect data from 366 Taiwanese travelers.
Hence, four push factors and six pull factors were identified as travel motivations through the factor analysis. Combined with the cluster analysis; five new groups were founded. Finally, five clusters which process unique profiles (location difference, visiting frequency, travel satisfaction, and destination loyalty) were addressed. The suggestions of developing effective market strategies to attract Taiwanese tourists to Hong Kong were also provided
Scaling Egocentric Vision: The EPIC-KITCHENS Dataset
First-person vision is gaining interest as it offers a unique viewpoint on
people's interaction with objects, their attention, and even intention.
However, progress in this challenging domain has been relatively slow due to
the lack of sufficiently large datasets. In this paper, we introduce
EPIC-KITCHENS, a large-scale egocentric video benchmark recorded by 32
participants in their native kitchen environments. Our videos depict
nonscripted daily activities: we simply asked each participant to start
recording every time they entered their kitchen. Recording took place in 4
cities (in North America and Europe) by participants belonging to 10 different
nationalities, resulting in highly diverse cooking styles. Our dataset features
55 hours of video consisting of 11.5M frames, which we densely labeled for a
total of 39.6K action segments and 454.3K object bounding boxes. Our annotation
is unique in that we had the participants narrate their own videos (after
recording), thus reflecting true intention, and we crowd-sourced ground-truths
based on these. We describe our object, action and anticipation challenges, and
evaluate several baselines over two test splits, seen and unseen kitchens.
Dataset and Project page: http://epic-kitchens.github.ioComment: European Conference on Computer Vision (ECCV) 2018 Dataset and
Project page: http://epic-kitchens.github.i
Motivations and challenges for stream processing in edge computing
The 2030 Agenda for Sustainable Development of the United Nations General Assembly defines 17 development goals to be met for a sustainable future. Goals such as Industry, Innovation and Infrastructure and Sustainable Cities and Communities depend on digital systems. As a matter of fact, billions of Euros are invested into digital transformation within the European Union, and many researchers are actively working to push state-of-the-art boundaries for techniques/tools able to extract value and insights from the large amounts of raw data sensed in digital systems. Edge computing aims at supporting such data-to-value transformation. In digital systems that traditionally rely on central data gathering, edge computing proposes to push the analysis towards the devices and data sources, thus leveraging the large cumulative computational power found in modern distributed systems. Some of the ideas promoted in edge computing are not new, though. Continuous and distributed data analysis paradigms such as stream processing have argued about the need for smart distributed analysis for basically 20 years. Starting from this observation, this talk covers a set of standing challenges for smart, distributed, and continuous stream processing in edge computing, with real-world examples and use-cases from smart grids and vehicular networks
Mapping Transitions towards Sustainable Consumption : Latitudes, Legends and Declinations in the Interaction between Consumers Culture and Sustainable Business Models
This paper seeks to chart “a navigation route“ towards sustainable consumption. We draw on data collected in research on consumers’ response to integrated products and services bundles conceptualized in design literature as Product Service Systems (PSS). PSS is of interest as it offers potential social and environmental benefits. Such services- based sustainable consumption practices have been neglected by consumer researchers. Methodological approaches to sustainable consumption favoured by policy makers focus research and interventions on individual consumer behaviour, but these have very limited success. Consumer practices, and the role that Government and other institutions play, are a more appropriate conceptual framework to explicate sustainable consumption. However, this Practice Theory approach is not sufficient either; the best solution might be a combination of this with an understanding of the individual value pursued by consumers. We extend Shove (2010)’s contention that adoption of sustainable consumption practices can only be explained with socio-cultural approaches; we propose that a combination of this perspective with an understanding of the value expected by individual consumers, is a more suitable approach than either behavioural paradigms or practices on their own to map these adoption mechanisms.Non peer reviewe
The nested structure of urban business clusters
Although the cluster theory literature is bountiful in economics and regional
science, there is still a lack of understanding of how the geographical scales
of analysis (neighbourhood, city, region) relate to one another and impact the
observed phenomenon, and to which extent the clusters are industrially bound or
geographically consistent. In this paper, we cluster spatial economic
activities through a multi-scalar approach following percolation theory. We
consider both the industrial similarity and the geographical proximity of
firms, through their joint probability function which is constructed as a
copula. This gives rise to an emergent nested hierarchy of geoindustrial
clusters, which enables us to analyse the relationships between the different
scales, and specific industrial sectors. Using longitudinal business microdata
from the Office for National Statistics, we look at the evolution of clusters
which spans from very local groups of businesses to the metropolitan level, in
2007 and in 2014, so that the changes stemming from the financial crisis can be
observed.Comment: 20 pages, 10 figure
Partly melted DNA conformations obtained with a probability peak finding method
Peaks in the probabilities of loops or bubbles, helical segments, and
unzipping ends in melting DNA are found in this article using a peak finding
method that maps the hierarchical structure of certain energy landscapes. The
peaks indicate the alternative conformations that coexist in equilibrium and
the range of their fluctuations. This yields a representation of the
conformational ensemble at a given temperature, which is illustrated in a
single diagram called a stitch profile. This article describes the methodology
and discusses stitch profiles vs. the ordinary probability profiles using the
phage lambda genome as an example.Comment: 11 pages, 9 figures; v3: major changes; v4: applications sectio
First impressions: A survey on vision-based apparent personality trait analysis
© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Personality analysis has been widely studied in psychology, neuropsychology, and signal processing fields, among others. From the past few years, it also became an attractive research area in visual computing. From the computational point of view, by far speech and text have been the most considered cues of information for analyzing personality. However, recently there has been an increasing interest from the computer vision community in analyzing personality from visual data. Recent computer vision approaches are able to accurately analyze human faces, body postures and behaviors, and use these information to infer apparent personality traits. Because of the overwhelming research interest in this topic, and of the potential impact that this sort of methods could have in society, we present in this paper an up-to-date review of existing vision-based approaches for apparent personality trait recognition. We describe seminal and cutting edge works on the subject, discussing and comparing their distinctive features and limitations. Future venues of research in the field are identified and discussed. Furthermore, aspects on the subjectivity in data labeling/evaluation, as well as current datasets and challenges organized to push the research on the field are reviewed.Peer ReviewedPostprint (author's final draft
Symbol Emergence in Robotics: A Survey
Humans can learn the use of language through physical interaction with their
environment and semiotic communication with other people. It is very important
to obtain a computational understanding of how humans can form a symbol system
and obtain semiotic skills through their autonomous mental development.
Recently, many studies have been conducted on the construction of robotic
systems and machine-learning methods that can learn the use of language through
embodied multimodal interaction with their environment and other systems.
Understanding human social interactions and developing a robot that can
smoothly communicate with human users in the long term, requires an
understanding of the dynamics of symbol systems and is crucially important. The
embodied cognition and social interaction of participants gradually change a
symbol system in a constructive manner. In this paper, we introduce a field of
research called symbol emergence in robotics (SER). SER is a constructive
approach towards an emergent symbol system. The emergent symbol system is
socially self-organized through both semiotic communications and physical
interactions with autonomous cognitive developmental agents, i.e., humans and
developmental robots. Specifically, we describe some state-of-art research
topics concerning SER, e.g., multimodal categorization, word discovery, and a
double articulation analysis, that enable a robot to obtain words and their
embodied meanings from raw sensory--motor information, including visual
information, haptic information, auditory information, and acoustic speech
signals, in a totally unsupervised manner. Finally, we suggest future
directions of research in SER.Comment: submitted to Advanced Robotic
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