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    Becker, M., Mueller, J., Hotho, A. & Stumme, G. A Generic Platform for Ubiquitous and Subjective Data 2013 1st International Workshop on Pervasive Urban Crowdsensing Architecture and Applications, PUCAA 2013, Zurich, Switzerland -- September 9, 2013. Proceedings, pp. New York, NY, USA  inproceedings  
    Abstract: An increasing number of platforms like Xively or ThingSpeak are available to manage ubiquitous sensor data enabling the Internet of Things. Strict data formats allow interoperability and informative visualizations, supporting the development of custom user applications. Yet, these strict data formats as well as the common feed-centric approach limit the flexibility of these platforms. We aim at providing a concept that supports data ranging from text-based formats like JSON to images and video footage. Furthermore, we introduce the concept of extensions, which allows to enrich existing data points with additional information, thus, taking a data point centric approach. This enables us to gain semantic and user specific context by attaching subjective data to objective values. This paper provides an overview of our architecture including concept, implementation details and present applications. We distinguish our approach from several other systems and describe two sensing applications namely AirProbe and WideNoise that were implemented for our platform.
    BibTeX:
    @inproceedings{mueller-2013a,
      author = {Becker, Martin and Mueller, Juergen and Hotho, Andreas and Stumme, Gerd},
      title = {A Generic Platform for Ubiquitous and Subjective Data},
      booktitle = {1st International Workshop on Pervasive Urban Crowdsensing Architecture and Applications, PUCAA 2013, Zurich, Switzerland -- September 9, 2013. Proceedings},
      publisher = {ACM},
      year = {2013},
      pages = {New York, NY, USA},
      note = {Accepted for publication}
    }
    
    Haslhofer, B., Robitza, W., Lagoze, C. & Guimbretiere, F. Semantic Tagging on Historical Maps 2013   misc URL 
    Abstract: Tags assigned by users to shared content can be ambiguous. As a possible solution, we propose semantic tagging as a collaborative process in which a user selects and associates Web resources drawn from a knowledge context. We applied this general technique in the specific context of online historical maps and allowed users to annotate and tag them. To study the effects of semantic tagging on tag production, the types and categories of obtained tags, and user task load, we conducted an in-lab within-subject experiment with 24 participants who annotated and tagged two distinct maps. We found that the semantic tagging implementation does not affect these parameters, while providing tagging relationships to well-defined concept definitions. Compared to label-based tagging, our technique also gathers positive and negative tagging relationships. We believe that our findings carry implications for designers who want to adopt semantic tagging in other contexts and systems on the Web.
    BibTeX:
    @misc{haslhofer2013semantic,
      author = {Haslhofer, Bernhard and Robitza, Werner and Lagoze, Carl and Guimbretiere, Francois},
      title = {Semantic Tagging on Historical Maps},
      year = {2013},
      note = {cite arxiv:1304.1636Comment: 10 pages},
      url = {http://arxiv.org/abs/1304.1636}
    }
    
    Modeling and Mining Ubiquitous Social Media 2012
    Vol. 7472 
    book URL 
    BibTeX:
    @book{ACHH:12,,
      title = {Modeling and Mining Ubiquitous Social Media},
      publisher = {Springer Verlag},
      year = {2012},
      volume = {7472},
      url = {http://www.springer.com/computer/ai/book/978-3-642-33683-6}
    }
    
    Modeling and Mining Ubiquitous Social Media 2012
    Vol. 7472 
    book URL 
    BibTeX:
    @book{ACHH:12,,
      title = {Modeling and Mining Ubiquitous Social Media},
      publisher = {Springer Verlag},
      year = {2012},
      volume = {7472},
      url = {http://www.springer.com/computer/ai/book/978-3-642-33683-6}
    }
    
    Atzmueller, M., Becker, M., Doerfel, S., Kibanov, M., Hotho, A., Macek, B.-E., Mitzlaff, F., Mueller, J., Scholz, C. & Stumme, G. Ubicon: Observing Social and Physical Activities 2012 IEEE International Conference on Cyber, Physical and Social Computing, CPSCom 2012, Besançon, France, 20-23 November, 2012  inproceedings  
    Abstract: The connection of ubiquitous and social computing is an emerging research
    rea which is combining two prominent areas of computer science.
    n this paper, we tackle this topic from different angles: We describe
    ata mining methods for ubiquitous and social data, specifically
    ocusing on physical and social activities, and provide exemplary
    nalysis results. Furthermore, we give an overview on the Ubicon
    latform which provides a framework for the creation and hosting
    f ubiquitous and social applications for diverse tasks and projects.
    bicon features the collection and analysis of both physical and
    ocial activities of users for enabling inter-connected applications
    n ubiquitous and social contexts. We summarize three real-world
    ystems built on top of Ubicon, and exemplarily discuss the according
    ining and analysis aspects.
    BibTeX:
    @inproceedings{mueller-2012,
      author = {Atzmueller, Martin and Becker, Martin and Doerfel, Stephan and Kibanov, Mark and Hotho, Andreas and Macek, Björn-Elmar and Mitzlaff, Folke and Mueller, Juergen and Scholz, Christoph and Stumme, Gerd},
      title = {Ubicon: Observing Social and Physical Activities},
      booktitle = {IEEE International Conference on Cyber, Physical and Social Computing, CPSCom 2012, Besançon, France, 20-23 November, 2012},
      publisher = {IEEE},
      year = {2012}
    }
    
    Atzmueller, M., Becker, M., Doerfel, S., Kibanov, M., Hotho, A., Macek, B.-E., Mitzlaff, F., Mueller, J., Scholz, C. & Stumme, G. Ubicon: Observing Social and Physical Activities 2012 IEEE International Conference on Cyber, Physical and Social Computing, CPSCom 2012, Besançon, France, 20-23 November, 2012  inproceedings  
    Abstract: The connection of ubiquitous and social computing is an emerging research area which is combining two prominent areas of computer science. In this paper, we tackle this topic from different angles: We describe data mining methods for ubiquitous and social data, specifically focusing on physical and social activities, and provide exemplary analysis results. Furthermore, we give an overview on the Ubicon platform which provides a framework for the creation and hosting of ubiquitous and social applications for diverse tasks and projects. Ubicon features the collection and analysis of both physical and social activities of users for enabling inter-connected applications in ubiquitous and social contexts. We summarize three real-world systems built on top of Ubicon, and exemplarily discuss the according mining and analysis aspects.
    BibTeX:
    @inproceedings{mueller-2012,
      author = {Atzmueller, Martin and Becker, Martin and Doerfel, Stephan and Kibanov, Mark and Hotho, Andreas and Macek, Björn-Elmar and Mitzlaff, Folke and Mueller, Juergen and Scholz, Christoph and Stumme, Gerd},
      title = {Ubicon: Observing Social and Physical Activities},
      booktitle = {IEEE International Conference on Cyber, Physical and Social Computing, CPSCom 2012, Besançon, France, 20-23 November, 2012},
      publisher = {IEEE},
      year = {2012}
    }
    
    Mitzlaff, F. & Stumme, G. Relatedness of Given Names 2012 Human Journal
    Vol. 1(4), pp. 205-217 
    article URL 
    Abstract: As a result of the author's need for help in finding a given namefor the unborn baby, nameling, a search engine for given names, based on data from the ``Social Web'' was born. Within less than six months, more than 35,000 users accessed nameling with more than 300,000 search requests, underpinning the relevance of the underlying research questions. The present work proposes a new approach for discovering relations among given names, based on co-occurrences within Wikipedia. In particular, the task of finding relevant names for a given search query is considered as a ranking task and the performance of different measures of relatedness among given names are evaluated with respect to nameling's actual usage data. We will show that a modification for the PageRank algorithm overcomes limitations imposed by global network characteristics to preferential PageRank computations. By publishing the considered usage data, the research community is stipulated for developing advanced recommendation systems and analyzing influencing factors for the choice of a given name.
    BibTeX:
    @article{mitzlaff2012relatedness,
      author = {Mitzlaff, Folke and Stumme, Gerd},
      title = {Relatedness of Given Names},
      journal = {Human Journal},
      publisher = {Academy of Science and Engineering},
      year = {2012},
      volume = {1},
      number = {4},
      pages = {205-217},
      url = {http://www.kde.cs.uni-kassel.de/pub/pdf/mitzlaff2012relatedness.pdf}
    }
    
    Schweizer, I., Meurisch, C., Gedeon, J., Bärtl, R. & Mühlhäuser, M. Noisemap: multi-tier incentive mechanisms for participative urban sensing 2012 Proceedings of the Third International Workshop on Sensing Applications on Mobile Phones, pp. 9:1-9:5  inproceedings DOI URL 
    Abstract: Noise pollution is a problem increasingly acknowledged by authorities and governments around the globe. At last year's PhoneSense we presented Noisemap, a participating sensing application to accurately measure noise pollution. Noisemap incorporated frequency calibration to overcome the limited microphone hardware. The challenge remaining is how to motivate smartphone users to sacrifice their time and battery on measuring noise. A user study was conducted with 49 users divided into three groups. As expected the average measurements taken per user increased from 402 to 3,357 as the number of incentive schemes increased. Over the course of 7 weeks the users captured more than 85, 000 measurements, measuring for more than six hours on average.
    BibTeX:
    @inproceedings{Schweizer:2012:NMI:2389148.2389157,
      author = {Schweizer, Immanuel and Meurisch, Christian and Gedeon, Julien and Bärtl, Roman and Mühlhäuser, Max},
      title = {Noisemap: multi-tier incentive mechanisms for participative urban sensing},
      booktitle = {Proceedings of the Third International Workshop on Sensing Applications on Mobile Phones},
      publisher = {ACM},
      year = {2012},
      pages = {9:1--9:5},
      url = {http://doi.acm.org/10.1145/2389148.2389157},
      doi = {http://dx.doi.org/10.1145/2389148.2389157}
    }
    
    Flohr, O. Extraktion und Visualisierung ortsbezogener Informationen mit Tag-Clouds 2011 School: Gottfried Wilhelm Leibniz Universität Hannover  mastersthesis URL 
    Abstract: Informationen so aufzubereiten, dass sie für eine bestimmte Situation nützlich sind, ist eine große Herausforderung. In solchen Situationen soll ein Benutzer, wenn er sich an einem fremden Ort befindet, mit Hilfe des Android Smartphone interessante und wis- senswerte Informationen anzeigen lassen. Um dies bewerkstelligen zu können, muss es eine georeferenzierte Informationsquelle geben. Außerdem muss ein Konzept vor- handen sein, um diese Daten zu sammeln und so aufzubereiten, dass der Benutzer diese auch nützlich findet. Es muss eine Visualisierung dieser Daten geben, da der Platz zur Anzeige auf Smartphones sehr begrenzt ist. Als georeferenzierte Informationsquelle wird die Online-Enzyklopädie Wikipedia ge- nutzt, diese ist frei zugänglich und auch sehr umfassend. In dieser Arbeit wird das Konzept zur Sammlung und Aufbereitung von relevanten Daten behandelt. Zur In- formationsvisualisierung wird die Methode der Schlagwortwolke (engl. Tag-Cloud) verwendet. It is a major challenge to prepare useful information for a particular situation. In this situation an Android smartphone user wants to display interesting and important facts about an unknown place. To manage this task existence of a geo-referenced source of information has to be ensured. In order to collect and prepare this data a creation of concept is needed. Due to limited display space, it is necessary to construct a suitable visualization of this data. Wikipedia is used as a geo-referenced information resource, because it has open-access and it offers global geo-referenced information. This thesis covers the concept of col- lecting and preparing relevant data. To visualize information a tag cloud is used.
    BibTeX:
    @mastersthesis{flohr2011extraktion,
      author = {Flohr, Oliver},
      title = {Extraktion und Visualisierung ortsbezogener Informationen mit Tag-Clouds},
      school = {Gottfried Wilhelm Leibniz Universität Hannover},
      year = {2011},
      url = {http://www.se.uni-hannover.de/pub/File/pdfpapers/Flohr2011a.pdf}
    }
    
    Ganti, R., Ye, F. & Lei, H. Mobile crowdsensing: current state and future challenges 2011 Communications Magazine, IEEE
    Vol. 49(11), pp. 32-39 
    article DOI URL 
    Abstract: An emerging category of devices at the edge of the Internet are consumer-centric mobile sensing and computing devices, such as smartphones, music players, and in-vehicle sensors. These devices will fuel the evolution of the Internet of Things as they feed sensor data to the Internet at a societal scale. In this article, we examine a category of applications that we term mobile crowdsensing, where individuals with sensing and computing devices collectively share data and extract information to measure and map phenomena of common interest. We present a brief overview of existing mobile crowdsensing applications, explain their unique characteristics, illustrate various research challenges, and discuss possible solutions. Finally, we argue the need for a unified architecture and envision the requirements it must satisfy.
    BibTeX:
    @article{6069707,
      author = {Ganti, R.K. and Ye, Fan and Lei, Hui},
      title = {Mobile crowdsensing: current state and future challenges},
      journal = {Communications Magazine, IEEE},
      year = {2011},
      volume = {49},
      number = {11},
      pages = {32-39},
      url = {http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=6069707&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6069707},
      doi = {http://dx.doi.org/10.1109/MCOM.2011.6069707}
    }
    
    Harrison, J.L. Parsing “Participation” in Action Research: Navigating the Challenges of Lay Involvement in Technically Complex Participatory Science Projects 2011 Society & Natural Resources: An International Journal
    Vol. 24, pp. 702 - 716 
    article URL 
    BibTeX:
    @article{lindsey2011parsing,
      author = {Harrison, Jill Lindsey},
      title = {Parsing “Participation” in Action Research: Navigating the Challenges of Lay Involvement in Technically Complex Participatory Science Projects},
      journal = {Society & Natural Resources: An International Journal},
      year = {2011},
      volume = {24},
      pages = {702 - 716},
      url = {http://www.informaworld.com/10.1080/08941920903403115}
    }
    
    Kamel Boulos, M.N., Resch, B., Crowley, D.N., Breslin, J.G., Sohn, G., Burtner, R., Pike, W.A., Jezierski, E. & Chuang, K.Y. Crowdsourcing, citizen sensing and Sensor Web technologies for public and environmental health surveillance and crisis management: trends, OGC standards and application examples 2011 Int J Health Geogr
    Vol. 10(1), pp. 67-67 
    article DOI URL 
    Abstract: ABSTRACT: 'Wikification of GIS by the masses' is a phrase-term first coined by Kamel Boulos in 2005, two years earlier than Goodchild's term 'Volunteered Geographic Information'. Six years later (2005-2011), OpenStreetMap and Google Earth (GE) are now full-fledged, crowdsourced 'Wikipedias of the Earth' par excellence, with millions of users contributing their own layers to GE, attaching photos, videos, notes and even 3-D (three dimensional) models to locations in GE. From using Twitter in participatory sensing and bicycle-mounted sensors in pervasive environmental sensing, to creating a 100,000-sensor geo-mashup using Semantic Web technology, to the 3-D visualisation of indoor and outdoor surveillance data in real-time and the development of next-generation, collaborative natural user interfaces that will power the spatially-enabled public health and emergency situation rooms of the future, where sensor data and citizen reports can be triaged and acted upon in real-time by distributed teams of professionals, this paper offers a comprehensive state-of-the-art review of the overlapping domains of the Sensor Web, citizen sensing and 'human-in-the-loop sensing' in the era of the Mobile and Social Web, and the roles these domains can play in environmental and public health surveillance and crisis/disaster informatics. We provide an in-depth review of the key issues and trends in these areas, the challenges faced when reasoning and making decisions with real-time crowdsourced data (such as issues of information overload, "noise", misinformation, bias and trust), the core technologies and Open Geospatial Consortium (OGC) standards involved (Sensor Web Enablement and Open GeoSMS), as well as a few outstanding project implementation examples from around the world.
    BibTeX:
    @article{KamelBoulos:2011:Int-J-Health-Geogr:22188675,
      author = {Kamel Boulos, M N and Resch, B and Crowley, D N and Breslin, J G and Sohn, G and Burtner, R and Pike, W A and Jezierski, E and Chuang, K Y},
      title = {Crowdsourcing, citizen sensing and Sensor Web technologies for public and environmental health surveillance and crisis management: trends, OGC standards and application examples},
      journal = {Int J Health Geogr},
      year = {2011},
      volume = {10},
      number = {1},
      pages = {67-67},
      url = {http://www.ncbi.nlm.nih.gov/pubmed/22188675},
      doi = {http://dx.doi.org/10.1186/1476-072X-10-67}
    }
    
    NoiseMap - Real-time participatory noise maps 2011   inproceedings URL 
    BibTeX:
    @inproceedings{noauthororeditor2011noisemap,,
      title = {NoiseMap - Real-time participatory noise maps},
      year = {2011},
      url = {http://research.microsoft.com/en-us/um/redmond/events/phonesense2011/papers/NoiseMap.pdf}
    }
    
    Fuchs, E., Gruber, T., Pree, H. & Sick, B. Temporal data mining using shape space representations of time series 2010 Neurocomputing
    Vol. 74(1–3), pp. 379 - 393 
    article DOI URL 
    Abstract: Subspace representations that preserve essential information of high-dimensional data may be advantageous for many reasons such as improved interpretability, overfitting avoidance, acceleration of machine learning techniques. In this article, we describe a new subspace representation of time series which we call polynomial shape space representation. This representation consists of optimal (in a least-squares sense) estimators of trend aspects of a time series such as average, slope, curve, change of curve, etc. The shape space representation of time series allows for a definition of a novel similarity measure for time series which we call shape space distance measure. Depending on the application, time series segmentation techniques can be applied to obtain a piecewise shape space representation of the time series in subsequent segments. In this article, we investigate the properties of the polynomial shape space representation and the shape space distance measure by means of some benchmark time series and discuss possible application scenarios in the field of temporal data mining.
    BibTeX:
    @article{Fuchs2010379,
      author = {Fuchs, Erich and Gruber, Thiemo and Pree, Helmuth and Sick, Bernhard},
      title = {Temporal data mining using shape space representations of time series},
      journal = {Neurocomputing},
      year = {2010},
      volume = {74},
      number = {1–3},
      pages = {379 - 393},
      note = {Artificial Brains},
      url = {http://www.sciencedirect.com/science/article/pii/S0925231210002237},
      doi = {http://dx.doi.org/10.1016/j.neucom.2010.03.022}
    }
    
    Rezel, R. & Liang, S. SWE-FE: Extending folksonomies to the Sensor Web 2010 2010 International Symposium on Collaborative Technologies and Systems (CTS), pp. 349-356  inproceedings DOI URL 
    Abstract: This paper presents SWE-FE: a suite of methods to extend folksonomies to the worldwide Sensor Web in order to tackle the emergent data rich information poor (DRIP) syndrome afflicting most geospatial applications on the Internet. SWE-FE leverages the geospatial information associated with three key components of such collaborative tagging systems: tags, resources and users. Specifically, SWE-FE provides algorithms for: i) suggesting tags for users during the tag input stage; ii) generating tag maps which provides for serendipitous browsing; and iii) personalized searching within the folksonomy. We implement SWE-FE on the GeoCENS Sensor Web platform as a case study for assessing the efficacy of our methods. We outline the evaluation framework that we are currently employing to carry out this assessment.
    BibTeX:
    @inproceedings{rezel2010swefe,
      author = {Rezel, R. and Liang, S.},
      title = {SWE-FE: Extending folksonomies to the Sensor Web},
      booktitle = {2010 International Symposium on Collaborative Technologies and Systems (CTS)},
      publisher = {IEEE},
      year = {2010},
      pages = {349--356},
      url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5478494},
      doi = {http://dx.doi.org/10.1109/CTS.2010.5478494}
    }
    
    Song, C., Qu, Z., Blumm, N. & Barabási, A.-L. Limits of Predictability in Human Mobility 2010 Science
    Vol. 327(5968), pp. 1018-1021 
    article DOI URL 
    Abstract: A range of applications, from predicting the spread of human and electronic viruses to city planning and resource management in mobile communications, depend on our ability to foresee the whereabouts and mobility of individuals, raising a fundamental question: To what degree is human behavior predictable? Here we explore the limits of predictability in human dynamics by studying the mobility patterns of anonymized mobile phone users. By measuring the entropy of each individual’s trajectory, we find a 93% potential predictability in user mobility across the whole user base. Despite the significant differences in the travel patterns, we find a remarkable lack of variability in predictability, which is largely independent of the distance users cover on a regular basis.
    BibTeX:
    @article{Song19022010,
      author = {Song, Chaoming and Qu, Zehui and Blumm, Nicholas and Barabási, Albert-László},
      title = {Limits of Predictability in Human Mobility},
      journal = {Science},
      year = {2010},
      volume = {327},
      number = {5968},
      pages = {1018-1021},
      url = {http://www.sciencemag.org/content/327/5968/1018.abstract},
      doi = {http://dx.doi.org/10.1126/science.1177170}
    }
    
    Yassine, M. & Hajj, H. A Framework for Emotion Mining from Text in Online Social Networks. 2010 ICDM Workshops, pp. 1136-1142  inproceedings URL 
    BibTeX:
    @inproceedings{conf/icdm/YassineH10,
      author = {Yassine, Mohamed and Hajj, Hazem},
      title = {A Framework for Emotion Mining from Text in Online Social Networks.},
      booktitle = {ICDM Workshops},
      publisher = {IEEE Computer Society},
      year = {2010},
      pages = {1136-1142},
      url = {http://dblp.uni-trier.de/db/conf/icdm/icdmw2010.html#YassineH10}
    }
    
    Vinciarelli, A., Pantic, M. & Bourlard, H. Social signal processing: Survey of an emerging domain 2009 Image and Vision Computing
    Vol. 27(12), pp. 1743-1759 
    article DOI URL 
    Abstract: The ability to understand and manage social signals of a person we are communicating with is the core of social intelligence. Social intelligence is a facet of human intelligence that has been argued to be indispensable and perhaps the most important for success in life. This paper argues that next-generation computing needs to include the essence of social intelligence – the ability to recognize human social signals and social behaviours like turn taking, politeness, and disagreement – in order to become more effective and more efficient. Although each one of us understands the importance of social signals in everyday life situations, and in spite of recent advances in machine analysis of relevant behavioural cues like blinks, smiles, crossed arms, laughter, and similar, design and development of automated systems for social signal processing (SSP) are rather difficult. This paper surveys the past efforts in solving these problems by a computer, it summarizes the relevant findings in social psychology, and it proposes a set of recommendations for enabling the development of the next generation of socially aware computing.
    BibTeX:
    @article{citeulike:3782978,
      author = {Vinciarelli, Alessandro and Pantic, Maja and Bourlard, Hervé},
      title = {Social signal processing: Survey of an emerging domain},
      journal = {Image and Vision Computing},
      publisher = {Butterworth-Heinemann},
      year = {2009},
      volume = {27},
      number = {12},
      pages = {1743--1759},
      url = {http://dx.doi.org/10.1016/j.imavis.2008.11.007},
      doi = {http://dx.doi.org/10.1016/j.imavis.2008.11.007}
    }
    
    Juhos, I., Makra, L. & Tóth, B. Forecasting of traffic origin NO and NO2 concentrations by Support Vector Machines and neural networks using Principal Component Analysis 2008 Simulation Modelling Practice and Theory
    Vol. 16(9), pp. 1488 - 1502 
    article DOI URL 
    Abstract: The main aim of this paper is to predict NO and NO2 concentrations four days in advance comparing two artificial intelligence learning methods, namely, Multi-Layer Perceptron and Support Vector Machines on two kinds of spatial embedding of the temporal time series. Hourly values of NO and NO2 concentrations, as well as meteorological variables were recorded in a cross-road monitoring station with heavy traffic in Szeged in order to build a model for predicting NO and NO2 concentrations several hours in advance. The prediction of NO and NO2 concentrations was performed partly on the basis of their past values, and partly on the basis of temperature, humidity and wind speed data. Since NO can be predicted more accurately, its values were considered primarily when forecasting NO2. Time series prediction can be interpreted in a way that is suitable for artificial intelligence learning. Two effective learning methods, namely, Multi-Layer Perceptron and Support Vector Regression are used to provide efficient non-linear models for NO and NO2 times series predictions. Multi-Layer Perceptron is widely used to predict these time series, but Support Vector Regression has not yet been applied for predicting NO and NO2 concentrations. Grid search is applied to select the best parameters for the learners. To get rid of the curse of dimensionality of the spatial embedding of the time series Principal Component Analysis is taken to reduce the dimension of the embedded data. Three commonly used linear algorithms were considered as references: one-day persistence, average of several-day persistence and linear regression. Based on the good results of the average of several-day persistence, a prediction scheme was introduced, which forms weighted averages instead of simple ones. The optimization of these weights was performed with linear regression in linear case and with the learning methods mentioned in non-linear case. Concerning the NO predictions, the non-linear learning methods give significantly better predictions than the reference linear methods. In the case of NO2 the improvement of the prediction is considerable; however, it is less notable than for NO.
    BibTeX:
    @article{Juhos20081488,
      author = {Juhos, István and Makra, László and Tóth, Balázs},
      title = {Forecasting of traffic origin NO and NO2 concentrations by Support Vector Machines and neural networks using Principal Component Analysis},
      journal = {Simulation Modelling Practice and Theory},
      year = {2008},
      volume = {16},
      number = {9},
      pages = {1488 - 1502},
      url = {http://www.sciencedirect.com/science/article/pii/S1569190X08001585},
      doi = {http://dx.doi.org/10.1016/j.simpat.2008.08.006}
    }
    
    Li, C., Wei, D., Vause, J. & Liu, J. Towards a societal scale environmental sensing network with public participation 0 International Journal of Sustainable Development & World Ecology
    Vol. 0(0), pp. 1-6 
    article DOI URL 
    BibTeX:
    @article{doi:10.1080/13504509.2013.779326,
      author = {Li, Chunming and Wei, Dong and Vause, Jonathan and Liu, Jianping},
      title = {Towards a societal scale environmental sensing network with public participation},
      journal = {International Journal of Sustainable Development & World Ecology},
      year = {0},
      volume = {0},
      number = {0},
      pages = {1-6},
      url = {http://www.tandfonline.com/doi/abs/10.1080/13504509.2013.779326},
      doi = {http://dx.doi.org/10.1080/13504509.2013.779326}
    }
    

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