52 research outputs found
Factors determining the occurrence of Flat Bugs (Aradidae) in beech dominated forests
The habitat requirements of most Aradidae and the decisive factors that influence their occurrence are still poorly understood. To reduce this lack of knowledge a standardised survey of Aradidae in two large beech forest areas of Bavaria (northern Steigerwald and High Spessart) was conducted. The following hypotheses were tested: 1) With increasing habitat tradition (temporal continuity), population densities of Aradidae increase, 2) Increasing dead wood supply supports higher abundance of Aradidae, 3) There are key structures for particular species with respect to type of dead wood, diameter and exposure to sunlight, and 4) The occurrence of particular fungi species determines the occurrence of Aradidae. In our study, Aradidae were sampled in point sample plots by flight-interception traps and time-standardised hand collection. To analyse specific habitat requirements additional sampling was performed to increase the sample size. Four species of Aradidae were observed in the two forest areas: Aneurus avenius, Aradus betulae, A. conspicuus and A. depressus. The results demonstrate that all species have different and specific habitat requirements. Especially for A. betulae habitat tradition of standing dead wood of large dimensions infested by Fomes fomentarius seems to be crucial. Hence, A. betulae was only observed in the Spessart and only at the sites with habitat tradition.Die HabitatansprĂŒche der meisten Aradidae sowie die entscheidenden Faktoren die ihr Auftreten bedingen werden immer noch wenig verstanden. Um diese WissenslĂŒcke zu verringern wurde eine standardisierte Aufnahme der Aradidae in zwei groĂen Buchenwaldgebieten Bayerns (nördlicher Steigerwald, Hochspessart) durchgefĂŒhrt. Dabei wurden folgende Hypothesen ge-testet: 1) Die Populationsdichten der Aradidae steigen mit zunehmender Totholztradition, 2) erhöhte VerfĂŒgbarkeit an Totholz fördert eine höhere Abundanz der Aradidae, 3) es gibt SchlĂŒsselstrukturen fĂŒr bestimmte Arten in Bezug auf Totholztyp, -durchmesser und Sonnen-Exposition und 4) das Auftreten bestimmter Pilzarten bestimmt das Vorkommen der Aradidae. Zu diesem Zweck wurden Aradidae im Probekreisen mit Hilfe von Lufteklektoren und zeitnormierte Handaufsammlungen erfasst. Zur Analyse von spezifischen HabitatansprĂŒchen wurden zusĂ€tzliche FĂ€nge durchgefĂŒhrt um die StichprobengröĂe zu erhöhen. Vier Arten der Aradidae wurden in den bei-den Gebieten festgestellt: Aneurus avenius, Aradus betulae, A. conspicuus und A. depressus. Die Ergebnisse zeigen, dass alle Arten unterschiedliche und spezifische HabitatansprĂŒche haben. Besonders fĂŒr A. betulae scheint die Totholztradition, von starkem, von Fomes fomentarius besiedeltem, stehendem Totholz, eine entscheidende Rolle zu spielen. Folglich wurde sie Art nur am Totholz-traditionsreicheren Waldstandort, dem Spessart, gefunden
Höhengradienten in der BiodiversitĂ€ts-Forschung: eine Ăbersicht unter BerĂŒcksichtigung des Klimawandels
Mountains, with their isolated position and altitudinal belts, are hotspots of biodiversity. Their flora and fauna have been observed worldwide since the days of Alexander von Humboldt, which has led to basic knowledge and understanding of species composition and the most important driving forces of ecosystem differentiation in such altitudinal gradients. Systematically designed analyses of changes in species composition with increasing elevation have been increasingly implemented since the 1990s. Since global climate change is one of the most important problems facing the world this century, a focus on such ecosystem studies is urgently needed. To identify the main future needs of such research we analyze the studies dealing with species changes of diverse taxonomical groups along altitudinal gradients (0 to 6,400 m a.s. l.) on all continents, published during the past one to two decades. From our study we can conclude that although mountains are powerful for climate change research most studies have to face the challenge of separating confounding effects driving species assemblages along altitudinal gradients. Our study therefore supports the view of the need of a global altitudinal concept including that (1) not only one or a few taxonomical groups should be analyzed, but rather different taxonomical groups covering all ecosystem functions simultaneously; (2) relevant site conditions should be registered to reveal direct environmental variables responsible for species distribution patterns and to resolve inconsistent effects along the altitudinal gradients; (3) transect design is appropriate for analyzing ecosystem changes in site gradients and over time; (4) both the study design and the individual methods should be standardized to compare the data collected worldwide; and (5) a long-term perspective is important to quantify the degree and direction of species changes and to validate species distribution models. (6) Finally we suggest to develop experimental altitudinal approaches to overcome the addressed problems of biodiversity surveys.Gebirge mit ihrer mehr oder weniger isolierten Lage und ihren vielfĂ€ltigen Höhenstufen stellen âHotspots der BiodiversitĂ€tâ dar. Ihre Flora und Fauna wird seit den ersten Beschreibungen durch Alexander von Humboldt immer wieder untersucht. Systematisch angelegte Studien zur rĂ€umlichen Verteilung von Arten bzw. Artengruppen in Höhengradienten erlangen eine zunehmend gröĂere Bedeutung seit den 1990iger Jahren, insbesondere im Rahmen der Klimafolgenforschung. Um fĂŒr die zukĂŒnftige BiodiversitĂ€tsforschung die heute als wesentlich angesehenen ForschungsansĂ€tze zu identifizieren, wurden in dieser Studie Literaturangaben der letzten zwei Jahrzehnte ĂŒber die sich verĂ€ndernden Artenzusammensetzungen in Höhengradienten aus allen Kontinenten, verschiedenen Artengruppen und einem Höhenbereich von 0 bis 6.400 m ĂŒ. NN ausgewertet. Diese Zusammenstellung zeigt, dass Untersuchungen der Muster der BiodiversitĂ€t von Höhengradienten in Gebirgen einen wichtigen Beitrag fĂŒr das VerstĂ€ndnis der Herausbildung und Ănderung von BiodiversitĂ€tsmustern gerade im Rahmen des zu erwartenden Klimawandels leisten können. Die Musterbildung im Höhengradienten ist fĂŒr verschiedene Artengruppen durchaus unterschiedlich. Diese Literaturauswertung macht aber auch die Notwendigkeit eines weltweit einheitlichen Konzeptes fĂŒr die Forschung in Höhengradienten deutlich. Ein solches Konzept sollte folgende Gesichtspunkte beinhalten: (1) Nicht nur ausgewĂ€hlte Artengruppen, sondern mehrere verschiedene Artengruppen gemeinsam analysieren; nur so lassen sich die vielfĂ€ltigen Ăkosystemfunktionen und Prozesse berĂŒcksichtigen. (2) Begleitend möglichst viele Umweltfaktoren erfassen, um herausarbeiten zu können, welche der Umweltfaktoren fĂŒr die Musterbildung wirklich maĂgeblich sind. (3) Die Transekte so anlegen, dass sie nicht nur eine einmalige rĂ€umliche Analyse ermöglichen, sondern auch zukĂŒnftig im Sinne von Zeitreihen zur VerfĂŒgung stehen. (4) Sowohl das ErhebungsflĂ€chendesign als auch die Aufnahmemethoden fĂŒr die einzelnen Artengruppen standardisieren, um die Daten weltweit vergleichen zu können. (5) Langzeitstudien starten; denn nur sie bieten die Möglichkeit, erwartete oder aus Modellen abgeleitete VerĂ€nderungen der Artenzusammensetzungen bzw. von Verschiebungen von einzelnen Arten im Höhengradienten zu validieren. (6) Gezielt konzipierte Experimente einsetzen, um offene Fragen zur Verteilung der Arten in Höhengradienten untersuchen zu können
The âRothenbuch concept of dead wood and habitat treesâ and its effects on the diversity of structures and biodiversity of beech-forests
In einem ausgedehnten Laubwaldgebiet im Hochspessart (Nordwestbayern, Bezirk Unterfranken) wurde 2006 untersucht, ob sich alte Rot-BuchenbestĂ€nde, die seit mehr als 15 Jahren nach dem âRothenbucher Totholz- und Biotopbaumkonzeptâ bewirtschaftet werden, hinsichtlich Struktur-, und Artenvielfalt, von vergleichbaren BestĂ€nden ohne ein derartiges Konzpt unterscheiden. QualitĂ€tsziele des Konzeptes sind: Schutz von HorstbĂ€umen, Belassen von 10 ökologisch besonders wertvollen BĂ€umen pro Hektar, Erhalt und Akkumulation von durchschnittlich 10 m3 Totholz (ohne Stockholz und Kronentotholz) ab 20 Zentimeter pro Hektar auf der gesamten FlĂ€che. Die Umsetzung erfolgt nach dem Grundsatz, dass bei der Auswahl jedes zu entnehmenden Altbaums stets zwischen dem zu erwartenden Holzertrag, der waldbaulichen Notwendigkeit und dem ökologischen Wert abzuwĂ€gen ist. Der Vergleich erfolgte in Rothenbuch, und in einem unmittelbar angrenzenden Gebiet ohne entsprechendes Konzept bei Altenbuch, in jeweils 30 ein Hektar groĂen Gitterfeldern sowie in je 25 Probekreisen (0,1 Hektar). Vögel wurden zur Brutzeit im Rahmen einer quantitativen Gitterfeldkartierung erhoben. Xylobionte KĂ€fer wurden mit Hilfe von Kreuzfensterfallen und zeitstandardisierten HandfĂ€ngen auf je 25 Probekreisen gefangen. Die Mollusken und Holz bewohnenden Pilze wurden auf je 15 Probekreisen durch standardisierte Aufsammlungen erfasst. In WirtschaftswĂ€ldern seltene Strukturen, die zudem meist geklumpt auftreten (stehendes Totholz, Mulmhöhlen- und sonstige BiotopbĂ€ume), wurden auf den 60 Hektarrastern, hĂ€ufigere und regelmĂ€Ăiger verteilte Strukturen wie Stockholz oder liegendes Totholz wurden in den Probekreisen aufgenommen. Folgende Hypothesen wurden getestet: 1. Das Rothenbucher Totholz- und Biotopbaumkonzept hat bisher keine Auswirkungen auf QuantitĂ€t und QualitĂ€t von liegendem und stehendem Totholz und BiotopbĂ€umen. 2. Das Rothenbucher Totholz- und Biotopbaumkonzept hat bisher keine Auswirkungen auf Abundanzen und Artenreichtum von Indikatorgruppen. 3. Das Rothenbucher Totholz- und Biotopbaumkonzept hat bisher keine Auswirkungen auf Abundanzen und Artenreichtum an Habitat- und Strukturtradition gebundener und gefĂ€hrdeter Arten. Es konnte kein Unterschied bei der Anzahl von BiotopbĂ€umen in beiden Gebieten festgestellt werden. Signifikante Unterschiede zugunsten von Rothenbuch ergaben sich bei den Mengen an liegendem und stehendem Totholz und dem Angebot an Totholz stĂ€rkerer Dimensionen. Es wurden in Rothenbuch signifikant mehr Vogelarten und Individuen als in Altenbuch registriert. Besonders deutlich im Vergleich der Avizönosen war der Unterschied bei HöhlenbrĂŒtern, wĂ€hrend die Werte fĂŒr Vogelarten mit Bindung an Holzstrukturen nur einen Trend ergaben. Die Artenindikatoranalyse ergab folgende Arten als signifikant hĂ€ufiger und stetiger im totholzreicheren Rothenbuch: Mittelspecht, Kohlmeise, Rotkehlchen, Grauspecht, Halsband- und TrauerschnĂ€pper, Sumpfmeise und MönchsgrasmĂŒcke. Nur der Buchfink (der im bayerischen Wirtschaftwald hĂ€ufigste Vogel) erwies sich als Charakterart fĂŒr Altenbuch. Die Artenzahl und Abundanzen der Mollusken lag in Rothenbuch signifikant ĂŒber den Werten von Altenbuch. Auch die Anzahl gefĂ€hrdeter Weichtierarten und die entsprechenden Individuenzahlen waren in Rothenbuch höher. Bei xylobionten KĂ€ferarten wurden in Rothenbuch signifikant höhere Artenzahlen aller Arten und der gefĂ€hrdeten Arten festgestellt. Auch die Registrierungen und Artenzahlen von Holz bewohnenden Pilzen pro Probekreis lagen in Rothenbuch signifikant höher. Damit konnte gezeigt werden, dass bezĂŒglich der Totholzmengen bereits nach etwa 15 Jahren deutliche Erfolge erzielt werden können. Das Fehlen von Unterschieden bei BiotopbĂ€umen und wichtiger Indikatorarten der ĂŒbergeordneten GroĂlandschaft Spessart in den untersuchten BestĂ€nden zeigt aber auch, dass ein Zeitraum von 15 Jahren fĂŒr die Entstehung hochwertiger BiotopbĂ€ume nicht ausreicht. Die Dichte der Totholzstrukturen ist noch unzureichend, um den im Spessart reliktĂ€r vorhandenen, an Urwaldstrukturen gebundenen xylobionten Arten eine Wiederbesiedlung auf gröĂerer FlĂ€che zu ermöglichen. Inzwischen geht das Schutzkonzept der Bayrischen Staatsforsten (NEFT 2006) konsequent einen Schritt weiter, nĂ€mlich das Erreichen einer Gesamttotholzmenge von mindestens 40 mÂł Totholz pro Hektar fĂŒr ĂŒber 140jĂ€hrige BuchenbestĂ€nde und BestĂ€nde Ă€lter als 180 gĂ€nzlich aus der Nutzung zu nehmen.Investigations were performed in the New Red Sandstone region of the High Spessart in north-west Bavaria (Lower Franconia District), which is famous for extensive beech (Fagus sylvatica) forests on historical woodland sites with continuous tradition of broadleaved tree-cover. Under cool-humid and mild-winter upland conditions (submontane/oceanic) the beech achieves its maximum competitive power and tends to form pure stands of acidic beech forest (Luzuloluzuloidis-Fagetum, upland-form). The main goal was to evaluate the effects of the Rothenbuch concept, only 15 years after its implementation, on the diversity of structures and biodiversity. For this purpose mature stands of Beech (located in Rothenbuch) managed according to the guidelines of the concept were compared with conventionally managed stands (located in Altenbuch). Targets of the concept are protection of trees occupied by eyries of tree-breeding birds, retention of at least 10 ecologically valuable trees per hectare, conservation and accumulation of an average 10 m3 dead wood of over 20 centimeters dbh per hectare (excluding stumps and canopy dead wood). Implementation of the concept in forest management follows the principle âbefore an old tree is removed, a balance must be made between the estimated yield of timber, silvicultural necessity and the trees ecologicalvalueâ. In Rothenbuch and Altenbuch 30 grids of 1ha (bird study; rare forest structures with a clustered distribution) and 25 circular plots of 0.1ha (other groups and more frequent structures) were installed. Birds were surveyed at the time of incubation by quantitative grid mapping. Saproxylic beetles were sampled by flight-interception traps and time-based manual capture. Snails and wood-inhabiting fungi were surveyed by standardized collections on 15 of the 25 circular sample plots. Three null hypotheses were tested: (i) Rothenbuch concept has as yet had no effect on quality and quantity of lying and standing deadwood structures and habitat trees (ii) Rothenbuch concept has as yet had no effects on abundances and species richness of floral and faunal species indicator groups (iii) Rothenbuch concept has as yet had no effects on abundances and species richness of endangered species dependent on temporal continuity of tradition in habitats and structures The follow up study revealed no significant differences between the two sites in terms of the quantity of habitat trees (i.e. living trees with mulm- and rot-holes, rotten crown sections and dead knots, crevices etc.). However, we recorded increased deadwood resources at the Rothenbuch site: lying stems, standing snags and larger diameters. Consequently, more bird species and individuals were present there. We found a particularly pronounced difference in hole-nesters, whereas for birds linked to particular wood structures only a trend was observed. According to a species indicator analysis the following sensitive bird species were found to be significantly more frequent and constantly present at Rothenbuch: middle-spotted woodpecker, great tit, redbreast, grey woodpecker, pied and collared flycatcher, marsh tit and blackcap. On the other hand only common chaffinch proved to be a faithful species in Altenbuch. Species numbers and abundances of terrestrial molluscs and saproxylic beetles were also significantly increased at Rothenbuch, including endangered species listed in red-data books. Moreover, higher numbers of species and abundance of wood-inhabiting fungi were recorded. The results correlated with the increased deadwood resources in Rothenbuch. However, the unchanged low numbers of habitat trees and the lack of important indicator species prove that the period of 15 years was not sufficient for the appearance of habitat trees with suitable microstructures. The frequency of deadwood is furthermore still inadequate for a broader re-colonization by the scattered relict species of virgin forest which are considered to be closely associated with primeval structures and features. In the meantime the concept of the Bavarian state forestry organisation (NEFT 2006) has gone one step further in setting a target dead wood volume of at least 40 m3 per hectare for beech stands older than 140 years, and complete removal of stands older than 180 years from utilization
Spatial patterns of microsclerotia from Verticillium dahliae Kleb. in soils of Bavarian maple stands
In den vergangenen Jahren wurden durch die Bayerische Landesanstalt fĂŒr Wald und Forstwirtschaft vermehrt Stammnekrosen an AhornbĂ€umen, die durch den bodenbĂŒrtigen Erreger Verticillium dahliae Kleb. verursacht werden, diagnostiziert. In dem hier vorgestellten Projekt wurden in fĂŒnf AhornbestĂ€nden entlang eines jeweils 100 m langen Transektes Bodenproben auf Mikrosklerotien hin und StammschĂ€den an dem Bestand untersucht. Ziel war es zu prĂŒfen, ob der Erreger durch infiziertes Pflanzgut in die BestĂ€nde gebracht worden ist. Die Ergebnisse konnten diesen Zusammenhang nicht bestĂ€tigen. Die Verteilung der Mikrosklerotien im Boden wies keinen erkennbaren Zusammenhang mit den geschĂ€digten AhornbĂ€umen auf. Die Ergebnisse deuten viel mehr darauf hin, dass sich der Erreger unabhĂ€ngig von gesunden und kranken Ahornen in den BestĂ€nden etabliert hat. JahrringzĂ€hlungen anhand von geschĂ€digten BĂ€umen deuten darauf hin, dass der Schaden unmittelbar nach der extremen Trockenheit im Jahr 2003 eingetreten ist. Somit wird ein Zusammenhang zwischen extremen Witterungsereignissen und der Erkrankung vermutet.
During the last years, the Bavarian State Institute of Forestry received increasing numbers of announcements that dealt with necrosis on stems of maple trees caused by the soilborne fungus Verticillium dahliae Kleb. In this study, five forest areas were investigated along transects up to 100 m by soil sampling and mapping of diseased trees to find out if the pathogen had been introduced by infested maple seedlings. Our results yielded no evidence for this assumption. The spatial distribution of microsclerotia concentrations in the soil did not correlate with spatial patterns of diseased trees. This indicates that Verticillium was established on the sample plots independently from healthy or infested maple trees. Counting of year rings of infested maple trees revealed that the trees had developed their necrosis immediately after the drought in the year 2003. Hence, a connection between these extreme climate conditions and disease incidence cannot be excluded.
 
Chiral Susceptibility in Hard Thermal Loop Approximation
The static and dynamic chiral susceptibilities in the quark-gluon plasma are
calculated within the lowest order perturbative QCD at finite temperature and
the Hard Thermal Loop resummation technique using an effective quark
propagator. After regularisation of ultraviolet divergences, the Hard Thermal
Loop results are compared to QCD lattice simulations.Comment: 12 pages, 4 figures, revised version, to be published in Phys. Rev.
Behind the Scenes:The Two-Weeks Stay of Beamline for Schools Winning Students at DESY
In a previous paper1 the BL4S science competition has been presented from the technical point of view. This paper focuses on the organizational aspects of the period that the winning teams spent at DESY to perform their experiments. Together with a description of the event, this paper provides the unique point of view of the participants
Cadherin-9 Is a Novel Cell Surface Marker for the Heterogeneous Pool of Renal Fibroblasts
BACKGROUND: Interstitial fibroblasts are a minor, but nevertheless very important, component of the kidney. They secrete and remodel extracellular matrix and they produce active compounds such as erythropoietin. However, studying human renal fibroblasts has been hampered by the lack of appropriate surface markers. METHODS AND FINDINGS: The expression of cadherin-9 in various human renal cell lines and tissues was studied on the mRNA level by RT-PCR and on the protein level with the help of newly generated cadherin-9 antibodies. The classical type II cadherin-9, so far only described in the neural system, was identified as a reliable surface marker for renal fibroblasts. Compared to FSP1, a widely-used cytosolic renal fibroblast marker, cadherin-9 showed a more restricted expression pattern in human kidney. Under pathological conditions, cadherin-9 was expressed in the stroma of renal cell carcinoma, but not in the tumor cells themselves, and in renal fibrosis the percentage of cadherin-9-positive cells was clearly elevated 3 to 5 times compared to healthy kidney tissue. Induction of epithelial mesenchymal transition in renal epithelial cells with cyclosporin-A, which causes renal fibrosis as a side effect, induced cadherin-9 expression. Functional studies following siRNA-mediated knockdown of cadherin-9 revealed that it acts in the kidney like a typical classical cadherin. It was found to be associated with catenins and to mediate homophilic but not heterophilic cell interactions. CONCLUSIONS: Cadherin-9 represents a novel and reliable cell surface marker for fibroblasts in healthy and diseased kidneys. Together with the established marker molecules FSP1, CD45 and alpha smooth muscle actin, cadherin-9 can now be used to differentiate the heterogenic pool of renal fibroblasts into resident and activated fibroblasts, immigrated bone marrow derived fibroblast precursors and cells in different stages of epithelial mesenchymal transition
Neuronal Aneuploidy in Health and Disease: A Cytomic Approach to Understand the Molecular Individuality of Neurons
Structural variation in the human genome is likely to be an important mechanism for neuronal diversity and brain disease. A combination of multiple different forms of aneuploid cells due to loss or gain of whole chromosomes giving rise to cellular diversity at the genomic level have been described in neurons of the normal and diseased adult human brain. Here, we describe recent advances in molecular neuropathology based on the combination of slide-based cytometry with molecular biological techniques that will contribute to the understanding of genetic neuronal heterogeneity in the CNS and its potential impact on Alzheimer's disease and age-related disorders
Human Practice. Digital Ecologies. Our Future. : 14. Internationale Tagung Wirtschaftsinformatik (WI 2019) : Tagungsband
Erschienen bei: universi - UniversitÀtsverlag Siegen. - ISBN: 978-3-96182-063-4Aus dem Inhalt:
Track 1: Produktion & Cyber-Physische Systeme
Requirements and a Meta Model for Exchanging Additive Manufacturing Capacities
Service Systems, Smart Service Systems and Cyber- Physical SystemsâWhatâs the difference? Towards a Unified Terminology
Developing an Industrial IoT Platform â Trade-off between Horizontal and Vertical Approaches
Machine Learning und Complex Event Processing: Effiziente Echtzeitauswertung am Beispiel Smart Factory
Sensor retrofit for a coffee machine as condition monitoring and predictive maintenance use case
Stakeholder-Analyse zum Einsatz IIoT-basierter Frischeinformationen in der Lebensmittelindustrie
Towards a Framework for Predictive Maintenance Strategies in Mechanical Engineering - A Method-Oriented Literature Analysis
Development of a matching platform for the requirement-oriented selection of cyber physical systems for SMEs
Track 2: Logistic Analytics
An Empirical Study of Customersâ Behavioral Intention to Use Ridepooling Services â An Extension of the Technology Acceptance Model
Modeling Delay Propagation and Transmission in Railway Networks
What is the impact of company specific adjustments on the acceptance and diffusion of logistic standards?
Robust Route Planning in Intermodal Urban Traffic
Track 3: Unternehmensmodellierung & Informationssystemgestaltung (Enterprise Modelling & Information Systems Design)
Work System Modeling Method with Different Levels of Specificity and Rigor for Different Stakeholder Purposes
Resolving Inconsistencies in Declarative Process Models based on Culpability Measurement
Strategic Analysis in the Realm of Enterprise Modeling â On the Example of Blockchain-Based Initiatives for the Electricity Sector
Zwischenbetriebliche Integration in der Möbelbranche: Konfigurationen und Einflussfaktoren
Novicesâ Quality Perceptions and the Acceptance of Process Modeling Grammars
Entwicklung einer Definition fĂŒr Social Business Objects (SBO) zur Modellierung von Unternehmensinformationen
Designing a Reference Model for Digital Product Configurators
Terminology for Evolving Design Artifacts
Business Role-Object Specification: A Language for Behavior-aware Structural Modeling of Business Objects
Generating Smart Glasses-based Information Systems with BPMN4SGA: A BPMN Extension for Smart Glasses Applications
Using Blockchain in Peer-to-Peer Carsharing to Build Trust in the Sharing Economy
Testing in Big Data: An Architecture Pattern for a Development Environment for Innovative, Integrated and Robust Applications
Track 4: Lern- und Wissensmanagement (e-Learning and Knowledge Management)
eGovernment Competences revisited â A Literature Review on necessary Competences in a Digitalized Public Sector
Say Hello to Your New Automated Tutor â A Structured Literature Review on Pedagogical Conversational Agents
Teaching the Digital Transformation of Business Processes: Design of a Simulation Game for Information Systems Education
Conceptualizing Immersion for Individual Learning in Virtual Reality
Designing a Flipped Classroom Course â a Process Model
The Influence of Risk-Taking on Knowledge Exchange and Combination
Gamified Feedback durch Avatare im Mobile Learning
Alexa, Can You Help Me Solve That Problem? - Understanding the Value of Smart Personal Assistants as Tutors for Complex Problem Tasks
Track 5: Data Science & Business Analytics
Matching with Bundle Preferences: Tradeoff between Fairness and Truthfulness
Applied image recognition: guidelines for using deep learning models in practice
Yield Prognosis for the Agrarian Management of Vineyards using Deep Learning for Object Counting
Reading Between the Lines of Qualitative Data â How to Detect Hidden Structure Based on Codes
Online Auctions with Dual-Threshold Algorithms: An Experimental Study and Practical Evaluation
Design Features of Non-Financial Reward Programs for Online Reviews: Evaluation based on Google Maps Data
Topic Embeddings â A New Approach to Classify Very Short Documents Based on Predefined Topics
Leveraging Unstructured Image Data for Product Quality Improvement
Decision Support for Real Estate Investors: Improving Real Estate Valuation with 3D City Models and Points of Interest
Knowledge Discovery from CVs: A Topic Modeling Procedure
Online Product Descriptions â Boost for your Sales?
EntscheidungsunterstĂŒtzung durch historienbasierte Dienstreihenfolgeplanung mit Pattern
A Semi-Automated Approach for Generating Online Review Templates
Machine Learning goes Measure Management: Leveraging Anomaly Detection and Parts Search to Improve Product-Cost Optimization
Bedeutung von Predictive Analytics fĂŒr den theoretischen Erkenntnisgewinn in der IS-Forschung
Track 6: Digitale Transformation und Dienstleistungen
Heuristic Theorizing in Software Development: Deriving Design Principles for Smart Glasses-based Systems
Mirroring E-service for Brick and Mortar Retail: An Assessment and Survey
Taxonomy of Digital Platforms: A Platform Architecture Perspective
Value of Star Players in the Digital Age
Local Shopping Platforms â Harnessing Locational Advantages for the Digital Transformation of Local Retail Outlets: A Content Analysis
A Socio-Technical Approach to Manage Analytics-as-a-Service â Results of an Action Design Research Project
Characterizing Approaches to Digital Transformation: Development of a Taxonomy of Digital Units
Expectations vs. Reality â Benefits of Smart Services in the Field of Tension between Industry and Science
Innovation Networks and Digital Innovation: How Organizations Use Innovation Networks in a Digitized Environment
Characterising Social Reading Platformsâ A Taxonomy-Based Approach to Structure the Field
Less Complex than Expected â What Really Drives IT Consulting Value
Modularity Canvas â A Framework for Visualizing Potentials of Service Modularity
Towards a Conceptualization of Capabilities for Innovating Business Models in the Industrial Internet of Things
A Taxonomy of Barriers to Digital Transformation
Ambidexterity in Service Innovation Research: A Systematic Literature Review
Design and success factors of an online solution for cross-pillar pension information
Track 7: IT-Management und -Strategie
A Frugal Support Structure for New Software Implementations in SMEs
How to Structure a Company-wide Adoption of Big Data Analytics
The Changing Roles of Innovation Actors and Organizational Antecedents in the Digital Age
Bewertung des Kundennutzens von Chatbots fĂŒr den Einsatz im Servicedesk
Understanding the Benefits of Agile Software Development in Regulated Environments
Are Employees Following the Rules? On the Effectiveness of IT Consumerization Policies
Agile and Attached: The Impact of Agile Practices on Agile Team Membersâ Affective Organisational Commitment
The Complexity Trap â Limits of IT Flexibility for Supporting Organizational Agility in Decentralized Organizations
Platform Openness: A Systematic Literature Review and Avenues for Future Research
Competence, Fashion and the Case of Blockchain
The Digital Platform Otto.de: A Case Study of Growth, Complexity, and Generativity
Track 8: eHealth & alternde Gesellschaft
Security and Privacy of Personal Health Records in Cloud Computing Environments â An Experimental Exploration of the Impact of Storage Solutions and Data Breaches
Patientenintegration durch Pfadsysteme
Digitalisierung in der StressprĂ€vention â eine qualitative Interviewstudie zu Nutzenpotenzialen
User Dynamics in Mental Health Forums â A Sentiment Analysis Perspective
Intent and the Use of Wearables in the Workplace â A Model Development
Understanding Patient Pathways in the Context of Integrated Health Care Services - Implications from a Scoping Review
Understanding the Habitual Use of Wearable Activity Trackers
On the Fit in Fitness Apps: Studying the Interaction of Motivational Affordances and Usersâ Goal Orientations in Affecting the Benefits Gained
Gamification in Health Behavior Change Support Systems - A Synthesis of Unintended Side Effects
Investigating the Influence of Information Incongruity on Trust-Relations within Trilateral Healthcare Settings
Track 9: Krisen- und KontinuitÀtsmanagement
Potentiale von IKT beim Ausfall kritischer Infrastrukturen: Erwartungen, Informationsgewinnung und Mediennutzung der Zivilbevölkerung in Deutschland
Fake News Perception in Germany: A Representative Study of Peopleâs Attitudes and Approaches to Counteract Disinformation
Analyzing the Potential of Graphical Building Information for Fire Emergency Responses: Findings from a Controlled Experiment
Track 10: Human-Computer Interaction
Towards a Taxonomy of Platforms for Conversational Agent Design
Measuring Service Encounter Satisfaction with Customer Service Chatbots using Sentiment Analysis
Self-Tracking and Gamification: Analyzing the Interplay of Motivations, Usage and Motivation Fulfillment
Erfolgsfaktoren von Augmented-Reality-Applikationen: Analyse von Nutzerrezensionen mit dem Review-Mining-Verfahren
Designing Dynamic Decision Support for Electronic Requirements Negotiations
Who is Stressed by Using ICTs? A Qualitative Comparison Analysis with the Big Five Personality Traits to Understand Technostress
Walking the Middle Path: How Medium Trade-Off Exposure Leads to Higher Consumer Satisfaction in Recommender Agents
Theory-Based Affordances of Utilitarian, Hedonic and Dual-Purposed Technologies: A Literature Review
Eliciting Customer Preferences for Shopping Companion Apps: A Service Quality Approach
The Role of Early User Participation in Discovering Software â A Case Study from the Context of Smart Glasses
The Fluidity of the Self-Concept as a Framework to Explain the Motivation to Play Video Games
Heart over Heels? An Empirical Analysis of the Relationship between Emotions and Review Helpfulness for Experience and Credence Goods
Track 11: Information Security and Information Privacy
Unfolding Concerns about Augmented Reality Technologies: A Qualitative Analysis of User Perceptions
To (Psychologically) Own Data is to Protect Data: How Psychological Ownership Determines Protective Behavior in a Work and Private Context
Understanding Data Protection Regulations from a Data Management Perspective: A Capability-Based Approach to EU-GDPR
On the Difficulties of Incentivizing Online Privacy through Transparency: A Qualitative Survey of the German Health Insurance Market
What is Your Selfie Worth? A Field Study on Individualsâ Valuation of Personal Data
Justification of Mass Surveillance: A Quantitative Study
An Exploratory Study of Risk Perception for Data Disclosure to a Network of Firms
Track 12: Umweltinformatik und nachhaltiges Wirtschaften
KommunikationsfĂ€den im Nadelöhr â Fachliche Prozessmodellierung der Nachhaltigkeitskommunikation am Kapitalmarkt
Potentiale und Herausforderungen der Materialflusskostenrechnung
Computing Incentives for User-Based Relocation in Carsharing
Sustainabilityâs Coming Home: Preliminary Design Principles for the Sustainable Smart District
Substitution of hazardous chemical substances using Deep Learning and t-SNE
A Hierarchy of DSMLs in Support of Product Life-Cycle Assessment
A Survey of Smart Energy Services for Private Households
Door-to-Door Mobility Integrators as Keystone Organizations of Smart Ecosystems: Resources and Value Co-Creation â A Literature Review
Ein EntscheidungsunterstĂŒtzungssystem zur ökonomischen Bewertung von Mieterstrom auf Basis der Clusteranalyse
Discovering Blockchain for Sustainable Product-Service Systems to enhance the Circular Economy
Digitale RĂŒckverfolgbarkeit von Lebensmitteln: Eine verbraucherinformatische Studie
Umweltbewusstsein durch audiovisuelles Content Marketing? Eine experimentelle Untersuchung zur Konsumentenbewertung nachhaltiger Smartphones
Towards Predictive Energy Management in Information Systems: A Research Proposal
A Web Browser-Based Application for Processing and Analyzing Material Flow Models using the MFCA Methodology
Track 13: Digital Work - Social, mobile, smart
On Conversational Agents in Information Systems Research: Analyzing the Past to Guide Future Work
The Potential of Augmented Reality for Improving Occupational First Aid
Prevent a Vicious Circle! The Role of Organizational IT-Capability in Attracting IT-affine Applicants
Good, Bad, or Both? Conceptualization and Measurement of Ambivalent User Attitudes Towards AI
A Case Study on Cross-Hierarchical Communication in Digital Work Environments
âShow Me Your People Skillsâ - Employing CEO Branding for Corporate Reputation Management in Social Media
A Multiorganisational Study of the Drivers and Barriers of Enterprise Collaboration Systems-Enabled Change
The More the Merrier? The Effect of Size of Core Team Subgroups on Success of Open Source Projects
The Impact of Anthropomorphic and Functional Chatbot Design Features in Enterprise Collaboration Systems on User Acceptance
Digital Feedback for Digital Work? Affordances and Constraints of a Feedback App at InsurCorp
The Effect of Marker-less Augmented Reality on Task and Learning Performance
Antecedents for Cyberloafing â A Literature Review
Internal Crowd Work as a Source of Empowerment - An Empirical Analysis of the Perception of Employees in a Crowdtesting Project
Track 14: GeschÀftsmodelle und digitales Unternehmertum
Dividing the ICO Jungle: Extracting and Evaluating Design Archetypes
Capturing Value from Data: Exploring Factors Influencing Revenue Model Design for Data-Driven Services
Understanding the Role of Data for Innovating Business Models: A System Dynamics Perspective
Business Model Innovation and Stakeholder: Exploring Mechanisms and Outcomes of Value Creation and Destruction
Business Models for Internet of Things Platforms: Empirical Development of a Taxonomy and Archetypes
Revitalizing established Industrial Companies: State of the Art and Success Principles of Digital Corporate Incubators
When 1+1 is Greater than 2: Concurrence of Additional Digital and Established Business Models within Companies
Special Track 1: Student Track
Investigating Personalized Price Discrimination of Textile-, Electronics- and General Stores in German Online Retail
From Facets to a Universal Definition â An Analysis of IoT Usage in Retail
Is the Technostress Creators Inventory Still an Up-To-Date Measurement Instrument? Results of a Large-Scale Interview Study
Application of Media Synchronicity Theory to Creative Tasks in Virtual Teams Using the Example of Design Thinking
TrustyTweet: An Indicator-based Browser-Plugin to Assist Users in Dealing with Fake News on Twitter
Application of Process Mining Techniques to Support Maintenance-Related Objectives
How Voice Can Change Customer Satisfaction: A Comparative Analysis between E-Commerce and Voice Commerce
Business Process Compliance and Blockchain: How Does the Ethereum Blockchain Address Challenges of Business Process Compliance?
Improving Business Model Configuration through a Question-based Approach
The Influence of Situational Factors and Gamification on Intrinsic Motivation and Learning
Evaluation von ITSM-Tools fĂŒr Integration und Management von Cloud-Diensten am Beispiel von ServiceNow
How Software Promotes the Integration of Sustainability in Business Process Management
Criteria Catalog for Industrial IoT Platforms from the Perspective of the Machine Tool Industry
Special Track 3: Demos & Prototyping
Privacy-friendly User Location Tracking with Smart Devices: The BeaT Prototype
Application-oriented robotics in nursing homes
Augmented Reality for Set-up Processe
Mixed Reality for supporting Remote-Meetings
Gamification zur Motivationssteigerung von Werkern bei der Betriebsdatenerfassung
Automatically Extracting and Analyzing Customer Needs from Twitter: A âNeedminingâ Prototype
GaNEsHA: Opportunities for Sustainable Transportation in Smart Cities
TUCANA: A platform for using local processing power of edge devices for building data-driven services
Demonstrator zur Beschreibung und Visualisierung einer kritischen Infrastruktur
Entwicklung einer alltagsnahen persuasiven App zur Bewegungsmotivation fĂŒr Ă€ltere Nutzerinnen und Nutzer
A browser-based modeling tool for studying the learning of conceptual modeling based on a multi-modal data collection approach
Exergames & Dementia: An interactive System for People with Dementia and their Care-Network
Workshops
Workshop Ethics and Morality in Business Informatics (Workshop Ethik und Moral in der Wirtschaftsinformatik â EMoWIâ19)
Model-Based Compliance in Information Systems - Foundations, Case Description and Data Set of the MobIS-Challenge for Students and Doctoral Candidates
Report of the Workshop on Concepts and Methods of Identifying Digital Potentials in Information Management
Control of Systemic Risks in Global Networks - A Grand Challenge to Information Systems Research
Die Mitarbeiter von morgen - Kompetenzen kĂŒnftiger Mitarbeiter im Bereich Business Analytics
Digitaler Konsum: Herausforderungen und Chancen der Verbraucherinformati
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