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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

Assessing resources for implementing a community directed intervention (CDI) strategy in delivering multiple health interventions in urban poor communities in Southwestern Nigeria: a qualitative study

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Infectious Diseases of Poverty 2013年第1期2卷 195-212页

作者： Ikeoluwapo O Ajayi Ayodele S Jegede Catherine O Falade johannes Sommerfeld Epidemiology and Biostatistics Research Unit Institute of Medical Research and TrainingCollege of MedicineUniversity of IbadanIbadanNigeria Department of Epidemiology and Medical Statistics College of MedicineUniversity of IbadanIbadanNigeria Department of Sociology The Faculty of Social SciencesUniversity of IbadanIbadanNigeria Department of Pharmacology and Therapeutics College of MedicineUniversity of MedicineUniversity of IbadanIbadanNigeria Special Programme for Research and Training in Tropical Diseases(TDR) World Health OrganizationGenevaSwitzerland

Background:Many simple,affordable and effective disease control measures have had limited impact due to poor access especially by the poorer populations(urban and rural)and inadequate community participation.A proven strategy to address the problem of access to health interventions is the Community Directed Interventions(CDI)approach,which has been used successfully in rural *** study was carried out to assess resources for the use of a CDI strategy in delivering health interventions in poorly-served urban communities in Ibadan,***:A formative study was carried out in eight urban poor communities in the Ibadan metropolis in the Oyo *** methods comprising 12 focus group discussions(FGDs)with community members and 73 key informant interviews(KIIs)with community leaders,programme managers,community-based organisations(CBOs),non-government organisations(NGOs)and other stakeholders at federal,state and local government levels were used to collect data to determine prevalent diseases and healthcare delivery services,as well as to explore the potential resources for a CDI *** interviews were audio *** analysis was used to analyse the ***:Malaria,upper respiratory tract infection,diarrhoea and measles were found to be prevalent in children,while hypertension and diabetes topped the list of diseases among *** was financed mainly by out-of-pocket *** and location were identified as hindrances to utilisation of health facilities;informal cooperatives(esusu)were available to support those who could not pay for ***,nutrition,reproductive health,tuberculosis(TB)and leprosy,environmental health,malaria and HIV/AIDs control programmes were the ongoing *** strategies included house-to-house,home-based treatment,health education and *** participation in the planning,implementation and monitoring of development projects was reported as common practic

关键词： Community directed intervention Urban poor Health interventions Community participation

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

Collision Detection in Interactive 3D Environments

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Compressively-strained GaSb nanowires with core-shell heterostructures

2004年

作者： Gino johannes Apolonia van den Bergen

来源：畅想之星图书光盘版（南... 评论

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Nano Research 2020年第9期13卷 2517-2524页

作者： Zhongyunshen Zhu johannes Svensson Axel R.Persson Reine Wallenberg Andrei V.Gromov Lars-Erik Wernersson Departm ent of Electrical and Information Technology Lund UniversityBox 11822100 LundSweden Centre for Analysis and Synthesis Lund UniversityBox 12422100 Lundt Sweden NanoLund Lund UniversityBox 11822100 LundSweden EaStCHEM School of ChemistryUniversity of EdinburghEdinburgh EH93FJUK

GaSb-based nanowires in a gate-all-around geometry are good candidates for binary p-type transistors,however they require the introduction of compressive strain to enhance the transport ***,we for the first time demonstrate epitaxial GaSb-GaASxSb1-x core-shell nanowires with a compressively strained *** axial and hydrostatic strain in GaSb core have been measured by X-ray diffraction(XRD)and Raman scattering,*** optimal sample,almost without plastic relaxation,has an axial strain of-0.88%and a hydrostatic strain of-1.46%,leading to a noticeable effect where the light hole band is calculated to be 33.4 meV above the heavy hole band at the *** valence band feature offers more light holes to contribute the transport process,and thus may provide enhanced hole mobility by reducing both the interband scattering and the hole effective *** results show that lattice-mismatched epitaxial core-shell heterostructures of high quality can also be realized in the promising yet demanding GaSb-based system.

关键词： compressive strain GaSb-GaAsxSbi-x core-shell nanowires heterostructure p-type transistors

Evaluation of Ultrasound-based Surveillance for Hepatocellular Carcinoma in Patients at Risk:Results From a German Multicenter Retrospective Cohort Study

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Journal of Clinical and Translational Hepatology 2023年第3期11卷 626-637页

作者： johannes Gillessen Philipp Reuken Peter-Marton Hunyady Matthias Christian Reichert Lucian Lothschütz Fabian Finkelmeier Matthias Nowka Gabriel Allo Fabian Kütting Martin Bürger Dirk Nierhoff Hans-Michael Steffen Christoph Schramm University Hospital Cologne Department of Gastroenterology and HepatologyCologneGermany University Hospital Jena Department of Internal Medicine IV-GastroenterologyHepatologyInfectious DiseaseJenaGermany University Hospital Frankfurt Department of Internal Medicine 1-Gastroenterology und HepatologyPulmonology und AllergologyEndocrinologyFrankfurtGermany Department of Medicine II Saarland University Medical CenterHomburgGermany Department of Gastroenterology and Hepatology University Hospital of EssenEssenGermany

Background and Aims:Hepatocellular carcinoma(HCC)surveillance in patients at risk is strongly recommended and usually performed by ultrasound(US)semiannually with or without alfa-fetoprotein(AFP)*** pa-rameters except for surveillance intervals have not been strictly *** aimed to evaluate surveillance success and risk factors for surveillance ***:Patients with≥1 US prior to HCC diagnosis performed at four tertiary referral hospitals in Germany between 2008 and 2019 were retrospectively *** success was defined as HCC detection within Milan ***:Only 47%of 156 patients,median age 63(interquartile range:57-70)years,56%male,and 96%with cirrhosis,received recom-mended surveillance modality and *** fail-ure occurred in 29%and was significantly associated with lower median model for end-stage liver disease(MELD)score odds ratio(OR)1.154,95%confidence interval(CI):1.027-1.297,p=0.025)and HCC localization within right liver lobe(OR:6.083,95%CI:1.303-28.407,p=0.022),but not with AFP≥200μg/*** with surveillance failure had sig-nificantly more intermediate/advanced tumor stages(93%vs.6%,p<0.001),fewer curative treatment options(15%vs.75%,p<0.001)and lower survival at 1 year(54%vs.75%,p=0.041),2 years(32%vs.57%,p=0.019)and 5 years(0%vs.16%,p=0.009).Alcoholic and non-alcoholic fatty liver disease(OR:6.1,95%CI:1.7-21.3,p=0.005)and ascites(OR:3.9,95%CI:1.2-12.6,p=0.021)were in-dependently associated with severe visual limitations on ***:US-based HCC surveillance in patients at risk frequently fails and its failure is associated with unfavorable patient-related *** MELD score and HCC lo-calization within right liver lobe were significantly associated with surveillance failure.

关键词： Hepatocellular carcinoma Surveillance success Screening Ultra-sound.

Seismites in the Dasheng Group： New evidence of strong tectonic and earthquake activities of the Tanlu Fault Zone

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Science China Earth Sciences 2016年第3期59卷 601-618页

作者： TIAN Hong Shui Antonius johannes VAN LOON WANG Hua Lin ZHANG Shen He ZHU Jie Wang School of Civil Engineering Shandong Jianzhu University Jinan 250101 China Geological Institute Adam Mickiewicz University Mak6w Polnych 16 61-606 Poznan Poland Earthquake Engineering Research Center of Shandong Province Jinan 250014 China

More than 80 layers of seismites were recognized from the Early Cretaceous Dasheng Group in the Mazhan and Tancheng graben basins in the Tanlu Fault Zone, eastern China. The responsible seismic events took place about 110–100 Ma in the Early Cretaceous. The fault zone was affected at the time by strong tectonics, due to tension-related stretching and scattered squeezing by strike-slip faults. These tectonic activities induced a series of strong earthquakes with Richter magnitudes(M) of 5–8.5. The earthquakes affected saturated or semi-consolidated flood and lake sediments, and produced intra-layer deformations by several processes, including liquefaction, thixotropy, drop, faulting, cracking, filling and folding, which resulted in the formation of various soft-sediment deformation structures, such as dikes and veins of liquefied sand, liquefied breccias, liquefied homogeneous layers, load structures, flame structures, ball-and-pillow structures, boudinage, diapirs, fissure infillings, a giant conglomerate wedge, and syn-sedimentary faults. The seismites are new evidence of tectonic and seismic activities in the Tanlu Fault Zone during the Early Cretaceous; the series of strong seismic events that can be deduced from them must be considered as a response to the destruction of the North China Craton.

关键词：郯庐断裂带构造活动地震活动震积岩证据大生湖泊沉积物带强

Electrical and optical characteristics of highly transparent MOVPE-grown AlGaN-based tunnel heterojunction LEDs emitting at 232 nm

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Photonics Research 2021年第6期9卷 1117-1123页

作者： FRANK MEHNKE CHRISTIAN KUHN MARTIN GUTTMANN LUCA SULMONI VERENA MONTAG johannes GLAAB TIM WERNICKE MICHAEL KNEISSL Institute of Solid State Physics Technische Universität Berlin10623 BerlinGermany Ferdinand-Braun-Institut Leibniz-Institut für Höchstfrequenztechnik12489 BerlinGermany Current address:School of Electrical and Computer Engineering Georgia Institute of TechnologyAtlantaGeorgia 30332USA

We present the growth and electro-optical characteristics of highly transparent AlGaN-based tunnel heterojunction light-emitting diodes(LEDs)emitting at 232 nm entirely grown by metalorganic vapor phase epitaxy(MOVPE).A GaN:Si interlayer was embedded into a highly Mg-and Si-doped Al_(0.87)Ga_(0.13)N tunnel junction to enable polarization field enhanced *** LEDs exhibit an on-wafer integrated emission power of 77μWat 5 mA,which correlates to an external quantum efficiency(EQE)of 0.29%with 45μWemitted through the bottom sapphire substrate and 32μW emitted through the transparent top *** depositing a highly reflective aluminum reflector,a maximum emission power of 1.73 mW was achieved at 100 mA under pulsed mode operation with a maximum EQE of 0.35%as collected through the bottom substrate.

关键词： heterojunction MOVPE AlGaN

Rheumatoid arthritis: pathological mechanisms and modern pharmacologic therapies

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Bone Research 2018年第2期6卷 107-120页

作者： Qiang Guo Yuxiang Wang Dan Xu johannes Nossent Nathan J.Pavlos Jiake Xu Department of Spine Surgery Xiangya Hospital Central South University School of Biomedical Sciences Faculty of Health and Medical Sciences The University of Western Australia Musculoskeletal Health Network Department of Health WA School of Medicine Faculty of Health and Medical Sciences The University of Western Australia

Rheumatoid arthritis（RA） is a chronic systemic autoimmune disease that primarily affects the lining of the synovial joints and is associated with progressive disability, premature death, and socioeconomic burdens. A better understanding of how the pathological mechanisms drive the deterioration of RA progress in individuals is urgently required in order to develop therapies that will effectively treat patients at each stage of the disease progress. Here we dissect the etiology and pathology at specific stages：（i） triggering,（ii） maturation,（iii） targeting, and（iv） fulminant stage, concomitant with hyperplastic synovium, cartilage damage, bone erosion, and systemic consequences. Modern pharmacologic therapies（including conventional, biological, and novel potential small molecule disease-modifying anti-rheumatic drugs） remain the mainstay of RA treatment and there has been significant progress toward achieving disease remission without joint deformity. Despite this, a significant proportion of RA patients do not effectively respond to the current therapies and thus new drugs are urgently required. This review discusses recent advances of our understanding of RA pathogenesis, disease modifying drugs, and provides perspectives on next generation therapeutics for RA.

关键词： RA pathological mechanisms modern pharmacologic therapies