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A theoretical model for pattern discovery in visual analytics

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Visual Informatics 2021年第1期5卷 23-42页

作者： Natalia Andrienko Gennady Andrienko silvia miksch Heidrun Schumann Stefan Wrobel Fraunhofer Institute IAIS Sankt-AugustinGermany City University of LondonLondonUK TU Wien ViennaAustria University of Rostock RostockGermany University of Bonn BonnGermany

The word‘pattern’frequently appears in the visualisation and visual analytics literature,but what do we mean when we talk about patterns?We propose a practicable definition of the concept of a pattern in a data distribution as a combination of multiple interrelated elements of two or more data components that can be represented and treated as a unified *** theoretical model describes how patterns are made by relationships existing between data *** the types of these relationships,it is possible to predict what kinds of patterns may *** demonstrate how our model underpins and refines the established fundamental principles of *** model also suggests a range of interactive analytical operations that can support visual analytics workflows where patterns,once discovered,are explicitly involved in further data analysis.

关键词： Visual analytics Data distribution Pattern Abstraction Data organisation Data arrangement Data variation Pattern discovery

Visual analytics for event detection: Focusing on fraud

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Visual Informatics 2018年第4期2卷 198-212页

作者： Roger A.Leite Theresia Gschwandtner silvia miksch Erich Gstrein Johannes Kuntner Vienna University of Technology Austria sIT Solutions AT Spardat GmbH Austria Erste Group IT International Austria

The detection of anomalous events in huge amounts of data is sought in many *** instance,in the context of financial data,the detection of suspicious events is a prerequisite to identify and prevent attempts to ***,various financial fraud detection approaches have started to exploit Visual Analytics ***,there is no study available giving a systematic outline of the different approaches in this field to understand common strategies but also ***,we present a survey of existing approaches of visual fraud detection in order to classify different tasks and solutions,to identify and to propose further research *** this work,fraud detection solutions are explored through five main domains:banks,the stock market,telecommunication companies,insurance companies,and internal *** selected domains explored in this survey were chosen for sharing similar time-oriented and multivariate data *** this survey,we(1)analyze the current state of the art in this field;(2)define a categorization scheme covering different application domains,visualization methods,interaction techniques,and analytical methods which are used in the context of fraud detection;(3)describe and discuss each approach according to the proposed scheme;and(4)identify challenges and future research topics.

关键词： Visual knowledge discovery Time series data Business and finance visualization Financial fraud detection

Hermes:Guidance-enriched Visual Analytics for economic network exploration

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Visual Informatics 2020年第4期4卷 11-22页

作者： Roger A.Leite Alessio Arleo Johannes Sorger Theresia Gschwandtner silvia miksch Vienna University of Technology-TU Wien Austria Complexity Science Hub Vienna Austria

The economy of a country can be modeled as a complex system in which several players buy and sell goods from each *** analyzing the investment flows,it is possible to reconstruct the supply chain for the production of most goods,whose understanding is important to analysts and public officials interested in creating and evaluating strategies for informed and strategic decision making,for instance,adjusting tax *** networks of players and investments,however,tend to be complex and very dense,which leads to over-plotted visualizations that obfuscate precious information such as the dependencies between productive sectors and *** this paper,we propose Hermes,a guidanceenriched Visual Analytics environment(named after the Greek God of Commerce)for the exploration of complex economic networks,to uncover supply chains,regions’productivity,and sector-to-sector *** practical knowledge regarding guidance,we designed and implemented a visual sub-graph querying approach to extract patterns from such complex investment graphs obtained from real-world *** present a three-fold evaluation of the system:we perform a qualitative evaluation of our approach with three domain experts,a separate assessment of the proposed guidance features with an expert researcher in this field,and a case study of Hermes using a bank account network dataset to demonstrate the generalizability of our approach.

关键词： Data visualization Economics Network exploration Supply chain

Gone full circle:A radial approach to visualize event-based networks in digital humanities

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Visual Informatics 2021年第1期5卷 45-60页

作者： Velitchko Filipov Victor Schetinger Kathrin Raminger Nathalie Soursos Susana Zapke silvia miksch TU Wien Favoritenstrasse 9-111040 ViennaAustria Musik und Kunst Privatuniversität Johannesgasse 4A1010 ViennaAustria

In the application domain of digital humanities network visualization is increasingly being used to conduct research as the main interests of the domain experts lie in exploring and analyzing relationships between entities and their changes over *** the dynamics and different perspectives of such data is a non-trivial task but it enables researchers to explore connections between disparate entities and investigate historical narratives that *** this paper we present Circular,an interactive exploration environment to visualize event-based networks and support research in digital humanities through visualization of historical subjects in space and *** radial design is the result of iterative collaboration with domain experts,and we discuss the process of collaborative development and exploration of public music festivities in Vienna as an example of immersive development *** validate our approach by means of both domain and visualization expert interviews and show the potential of this approach in supporting the visual exploration of historical *** discuss our design rationales,visual encodings,and interactions as to allow the reproducibility of this approach within a framework of transdisciplinary collaboration with digital humanities.

关键词： Event-based networks Information visualization Digital humanities

TBSSvis:Visual analytics for Temporal Blind Source Separation

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Visual Informatics 2022年第4期6卷 51-66页

作者： Nikolaus Piccolotto Markus Bögl Theresia Gschwandtner Christoph Muehlmann Klaus Nordhausen Peter Filzmoser silvia miksch TU Wien Institute of Visual Computing&Human-Centered TechnologyFavoritenstrasse 9–11A-1040 ViennaAustria Erste Group Bank AG Am Belvedere 1A-1100 ViennaAustria TU Wien Institute of Statistics and Mathematical Methods in EconomicsWiedner Hauptstrasse 8–10A-1040 ViennaAustria University of Jyväskylä Department of Mathematics and StatisticsFI40014 JyväskyläFinland

Temporal Blind Source Separation(TBSS)is used to obtain the true underlying processes from noisy temporal multivariate data,such as *** has similarities to Principal Component Analysis(PCA)as it separates the input data into univariate components and is applicable to suitable datasets from various domains,such as medicine,finance,or civil *** TBSS’s broad applicability,the involved tasks are not well supported in current tools,which offer only text-based interactions and single static *** are limited in analyzing and comparing obtained results,which consist of diverse data such as matrices and sets of time ***,parameter settings have a big impact on separation performance,but as a consequence of improper tooling,analysts currently do not consider the whole parameter *** propose to solve these problems by applying visual analytics(VA)*** primary contribution is a design study for TBSS,which so far has not been explored by the visualization *** developed a task abstraction and visualization design in a user-centered design ***-specific assembling of well-established visualization techniques and algorithms to gain insights in the TBSS processes is our secondary *** present TBSSvis,an interactive web-based VA prototype,which we evaluated extensively in two interviews with five TBSS *** and observations from these interviews show that TBSSvis supports the actual workflow and combination of interactive visualizations that facilitate the tasks involved in analyzing TBSS results.

关键词： Blind source separation Ensemble visualization Visual analytics Parameter space exploration

Perspectives of visualization onboarding and guidance in VA

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Visual Informatics 2022年第1期6卷 68-83页

作者： Christina Stoiber Davide Ceneda Markus Wagner Victor Schetinger Theresia Gschwandtner Marc Streit silvia miksch Wolfgang Aigner St.Pölten University of Applied Sciences Austria TU Wien Austria Erste Group Bank AG Austria Johannes Kepler University Linz Austria

A typical problem in Visual Analytics(VA)is that users are highly trained experts in their application domains,but have mostly no experience in using VA ***,users often have difficulties interpreting and working with visual *** overcome these problems,user assistance can be incorporated into VA systems to guide experts through the analysis while closing their knowledge *** types of user assistance can be applied to extend the power of VA,enhance the user’s experience,and broaden the audience for *** different approaches to visualization onboarding and guidance in VA already exist,there is a lack of research on how to design and integrate them in effective and efficient ***,we aim at putting together the pieces of the mosaic to form a coherent *** on the Knowledge-Assisted Visual Analytics model,we contribute a conceptual model of user assistance for VA by integrating the process of visualization onboarding and guidance as the two main approaches in this *** a result,we clarify and discuss the commonalities and differences between visualization onboarding and guidance,and discuss how they benefit from the integration of knowledge extraction and ***,we discuss our descriptive model by applying it to VA tools integrating visualization onboarding and guidance,and showing how they should be utilized in different phases of the analysis in order to be effective and accepted by the user.

关键词： User assistance Visual Analytics Conceptual model Visualization onboarding Guidance

Toward flexible visual analytics augmented through smooth display transitions

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Visual Informatics 2021年第3期5卷 28-38页

作者： Christian Tominski Gennady Andrienko Natalia Andrienko Susanne Bleisch Sara Irina Fabrikant Eva Mayr silvia miksch Margit Pohl AndréSkupin University of Rostock RostockGermany Fraunhofer IAIS Sankt AugustinGermany City University of LondonUK FHNW University of Applied Sciences and Arts Northwestern Switzerland MuttenzSwitzerland University of Zurich ZurichSwitzerland Danube University Krems KremsAustria TU Wien ViennaAustria San Diego State University San DiegoUSA

Visualizing big and complex multivariate data is *** address this challenge,we propose flexible visual analytics(FVA)with the aim to mitigate visual complexity and interaction complexity challenges in visual analytics,while maintaining the strengths of multiple perspectives on the studied *** the heart of our proposed approach are transitions that fluidly transform data between userrelevant views to offer various perspectives and insights into the *** smooth display transitions have been already proposed,there has not yet been an interdisciplinary discussion to systematically conceptualize and formalize these *** a call to further action,we argue that future research is necessary to develop a conceptual framework for flexible visual *** discuss preliminary ideas for prioritizing multi-aspect visual representations and multi-aspect transitions between them,and consider the display user for whom such depictions are produced and made available for visual *** this contribution we aim to further facilitate visual analytics on complex data sets for varying data exploration tasks and purposes based on different user characteristics and data use contexts.

关键词： Visual analytics Animated transitions Multi-faceted data

The complex role of protocadherin-19 in brain function:a focus on the oxytocin system

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Neural Regeneration Research 2025年第11期20卷 3211-3212页

作者： Sara Mazzoleni Marta Busnelli silvia Bassani CNR Institute of Neuroscience Vedano al LambroItaly NeuroMi Milan Center for Neuroscience MilanItaly

Mutations in the protocadherin-19(PCDH19)gene(Xq22.1)cause the X-linked syndrome known as developmental and epileptic encephalopathy 9(DEE9,OMIM#300088)(Dibbens et al.,2008).DEE9 is characterized by early-onset clustering epilepsy associated with intellectual disability ranging from mild to profound,autism spectrum disorder,and other neuropsychiatric features including schizophrenia,anxiety,attentiondeficit/hyperactivity,and obsessive or aggressive *** seizures may become less frequent in adolescence,psychiatric comorbidities persist and often worsen with age(Dibbens et al.,2008;Kolc et al.,2020).

关键词： epilepsy function system

Pancreatic cancer:Future challenges and new perspectives for an early diagnosis

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World Journal of Clinical Oncology 2025年第2期16卷 1-8页

作者： silvia Cocca Giuseppina Pontillo Marinella Lupo Raffaele Lieto Margherita Marocchi Maria Marsico Emanuela Dell'Aquila Santi Mangiafico Giuseppe Grande Rita Conigliaro Helga Bertani Gastroenterology and Endoscopy Unit Azienda Ospedaliero Universitaria Policlinico di ModenaModena 41121Italy Gastroenterology and Endoscopy Unit Presidio Ospedaliero San Giuseppe Moscati(AversaCE)–ASL CasertaCaserta 81100Italy Department of Clinical Medicine and Surgery University of Naples Federico IINaples 80131CampaniaItaly Department of Medical Oncology 1 IRCCS Regina Elena National Cancer InstituteRome 0144Italy Gastroenterology and Endoscopy Unit Azienda Ospedaliero Universitaria Policlinico“G Rodolico–San Marco”Catania 95123SiciliaItaly

This editorial is a commentary on the case report by Furuya et al focusing on the challenging diagnosis of early pancreatic adenocarcinoma and new tools for an earlier ***,pancreatic cancer still has a poor prognosis,mainly due to late diagnosis in an advanced *** main precancerous routes have been identified as pathways to pancreatic adenocarcinoma:The first encompasses a large group of mucinous cystic lesions:intraductal papillary mucinous neoplasm and mucinous cystic neoplasm,and the second is pancreatic intraepithelial *** the last decade the focus of research has been to identify high-risk patients,using advanced imaging techniques(magnetic resonance cholangiopancreatography or endoscopic ultrasonography)which could be helpful in finding“indirect signs”of early stage pancreatic ***,the survival rate still remains poor,and alternative screening methods are under *** retrograde cholangiopancreatography followed by serial pancreatic juice aspiration cytology could be a promising tool for identifying precursor lesions such as intraductal papillary mucinous neoplasm,but confirming data are still needed to validate its *** a combination of cross-sectional imaging,endoscopic techniques(old and new ones)and genetic and biological biomarkers also in pancreatic juice)could be the best solution to reach an early *** could help to predict and follow the progression of early pancreatic ***,further studies are needed to validate their diagnostic reliability and to establish diagnostic algorithms to improve prognosis and survival in patients with pancreatic cancer.

关键词： Pancreatic cancer Endoscopic ultrasonography Endoscopic retrograde cholangiopancreatography Magnetic resonance cholangiopancreatography Serial pancreatic-juice aspiration cytologic examination