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“Did I say something wrong?” A word-level analysis of Wikipedia articles for deletion discussions
(2016)
Diese Arbeit beschäftigt sich damit, linguistische Erkenntnisse auf Wortebene über schriftlichen Diskussionen zu gewinnen. Die Unterscheidung zwischen Botschaften, welche sich förderlich auf Diskussionen auswirken und jene, welche diese unterbrechen, spielte dabei eine besondere Rolle. Hierbei lag ein Schwerpunkt darauf, zu ermitteln, ob Ich- und Du-Botschaften charakteristisch für die beiden Kommunikationsarten sind. Diese Botschaften sind über Jahre hinweg zu Empfehlungen für erfolgreiche Kommunikation avanciert. Ihre zugeschriebene Wirkung wurde zwar mehrfach bestätigt, jedoch geschah dies stets in kleineren Studien. Deshalb wurde in dieser Arbeit mithilfe der Löschdiskussionen der englischen Wikipedia und der Liste gesperrter Nutzer eine vollautomatische Erstellung eines annotierten Datensatzes entwickelt. Dabei wurden Diskussionsbotschaften entweder als förderlich oder schädlich für einen konstruktiven Diskussionsverlauf markiert. Dieser Datensatz wurde anschließend im Rahmen einer binären Klassifikation verwendet, um charakteristische Worte für die beiden Kommunikationsarten zu bestimmen. Es wurde zudem untersucht, ob anhand von Synsemantika (auch bekannt als Funktionswörter) wie Pronomen oder Konjunktionen eine Entscheidung über die Kommunikationsart einer Botschaft getroffen werden kann. Du-Botschaften wurden, übereinstimmend mit ihrer zugeschriebenen negativen Auswirkung auf Kommunikation, als schädlich in den durchgeführten Untersuchungen identifiziert. Entgegen der zugeschriebenen positiven Auswirkung von Ich-Botschaften, wurde bei diesen ebenfalls eine schädlich Wirkung festgestellt. Eine klare Aussage über die Relevanz von Synsemantika konnte anhand der Ergebnisse nicht getroffen werden. Weitere charakteristische Worte konnten nicht festgestellt werden. Die Ergebnisse deuten darauf hin, dass ein anderes Modell textliche Diskussionen potentiell besser abbilden könnte.
Chemical plant protection is an essential element in integrated pest management and hence, in current crop production. The use of Plant Protection Products (PPPs) potentially involves ecological risk. This risk has to be characterised, assessed and managed.
For the coming years, an increasing need for agricultural products is expected. At the same time, preserving our natural resources and biodiversity per se is of equally fundamental importance. The relationship of our economic success and cultural progress to protecting the environment has been made plain in the Ecosystem Service concept. These distinct 'services' provide the foundation for defining ecological protection goals (Specific Protection Goals, SPGs) which can serve in the development of methods for ecological risk characterisation, assessment and management.
Ecological risk management (RM) of PPPs is a comprehensive process that includes different aspects and levels. RM is an implicit part of tiered risk assessment (RA) schemes and scenarios, yet RM also explicitly occurs as risk mitigation measures. At higher decision levels, RM takes further risks, besides ecological risk, into account (e.g., economic). Therefore, ecological risk characterisation can include RM (mitigation measures) and can be part of higher level RM decision-making in a broader Ecosystem Service context.
The aim of this thesis is to contribute to improved quantification of ecological risk as a basis for RA and RM. The initial general objective had been entitled as "… to estimate the spatial and temporal extent of exposure and effects…" and was found to be closely related to forthcoming SPGs with their defined 'Risk Dimension'.
An initial exploration of the regulatory framework of ecological RA and RM of PPPs and their use, carried out in the present thesis, emphasised the value of risk characterisation at landscape-scale. The landscape-scale provides the necessary and sufficient context, including abiotic and biotic processes, their interaction at different scales, as well as human activities. In particular, spatially (and temporally) explicit landscape-scale risk characterisation and RA can provide a direct basis for PPP-specific or generic RM. From the general need for tiered landscape-scale context in risk characterisation, specific requirements relevant to a landscape-scale model were developed in the present thesis, guided by the key objective of improved ecological risk quantification. In principle, for an adverse effect (Impact) to happen requires a sensitive species and life stage to co-occur with a significant exposure extent in space and time. Therefore, the quantification of the Probability of an Impact occurring is the basic requirement of the model. In a landscape-scale context, this means assessing the spatiotemporal distribution of species sensitivity and their potential exposure to the chemical.
The core functionality of the model should reflect the main problem structures in ecological risk characterisation, RA and RM, with particular relationship to SPGs, while being adaptable to specific RA problems. This resulted in the development of a modelling framework (Xplicit-Framework), realised in the present thesis. The Xplicit-Framework provides the core functionality for spatiotemporally explicit and probabilistic risk characterisation, together with interfaces to external models and services which are linked to the framework using specific adaptors (Associated-Models, e.g., exposure, eFate and effect models, or geodata services). From the Xplicit-Framework, and using Associated-Models, specific models are derived, adapted to RA problems (Xplicit-Models).
Xplicit-Models are capable of propagating variability (and uncertainty) of real-world agricultural and environmental conditions to exposure and effects using Monte Carlo methods and, hence, to introduce landscape-scale context to risk characterisation. Scale-dependencies play a key role in landscape-scale processes and were taken into account, e.g., in defining and sampling Probability Density Functions (PDFs). Likewise, evaluation of model outcome for risk characterisation is done at ecologically meaningful scales.
Xplicit-Models can be designed to explicitly address risk dimensions of SPGs. Their definition depends on the RA problem and tier. Thus, the Xplicit approach allows for stepwise introduction of landscape-scale context (factors and processes), e.g., starting at the definitions of current standard RA (lower-tier) levels by centring on a specific PPP use, while introducing real-world landscape factors driving risk. With its generic and modular design, the Xplicit-Framework can also be employed by taking an ecological entity-centric perspective. As the predictive power of landscape-scale risk characterisation increases, it is possible that Xplicit-Models become part of an explicit Ecosystem Services-oriented RM (e.g., cost/benefit level).
X-ray computed tomography (XRT) is a three-dimensional (3D), non-destructive, and reproducible investigation method capable of visualizing and examining internal and external structures of components independent of the material and geometry. In this work, XRT with its unique abilities complements conventionally utilized examination methods for the investigation of microstructure weakening induced by hydrogen corrosion and furthermore provides a new approach to corrosion research. The motivation for this is the current inevitable transformation to hydrogen-based steel production. Refractories of the system Al2O3-SiO2 are significant as lining materials. Two exemplary material types A and B, which differ mainly in their Al2O3:SiO2 ratio, are examined here using XRT. Identical samples of the two materials are measured, analyzed, and then compared before and after hydrogen attack. In this context, hydrogen corrosion-induced porosity and its spatial distribution and morphology are investigated. The results show that sample B has an higher resistance to hydrogen-induced attack than sample A. Furthermore, the 3D-representation revealed a differential porosity increase within the microstructure.
This thesis is concerned with an issue of considerable importance to the development of revision skills: the role of teacher feedback. Prompted by the concern to develop a model of instruction which will help students write to the best of their capacities, the present study forms a proposal: an interactive model of revision. The study researches whether the kind of feedback proposed in this model is indeed a helpful tool for revision and whether the kind of negotiated revision that occurs is a vehicle for learning. The first section of the thesis reviews different areas of literature which are relevant to the study. More specifically, Chapter 2 presents the historical and theoretical foundations of different writing instructional practices and sheds light on issues concerning the use of the process approach. It also reviews research based on sociocognitive theoretical perspectives in an attempt to delineate the impact of interpersonal or social activity on individual performance and progress. Chapter 3 examines issues associated with the process approach in particular and illustrates how theory and method come together in a process writing classroom. Chapter 4 presents the differences in revising behaviours between experienced and inexperienced writers in both L1 and L2 contexts and the various ways these differences have been justified. It also highlights a number of issues which have been identified as contributing to effective revision. Particular attention is paid to the role that teacher feedback has to play as a means of promoting substantive student revision with an instructional emphasis on fluency, organisation and language. Chapter 5 presents an interactive model of revision, which envisions a communicative exchange between two partners, the student-writer and the teacher-reader, collaborating in order to develop awareness of revision strategies and establish criteria for effective writing. Chapter 6 investigates the epistemological basis of the research and presents a set of research questions and hypotheses, which guided the investigation. Chapter 7 frames the context of the research and details the methods used to collect the data from the study. The study involved 100 Year 7 students in two gymnasia in Koblenz, Germany. During the time of the investigation, the students wrote and revised five tasks. Three of these tasks were revised after receiving teacher feedback, which focused on aspects such as appropriacy and sufficiency of information, organization, coherence and grammatical accuracy. The study investigates the effects of this kind of focused feedback on the students" revisions and explores the relationship between revision and text improvement. Large quantitative and qualitative data sets were generated during the research. The quantitative data was based on the student documents (1000 original and revised drafts) whereas the qualitative data emerged from student questionnaires and seven case studies. Chapter 8 presents descriptions of the data analyses. More specifically, it describes the initial and final coding of the revisions traced in the student documents. Then it focuses on the type of qualitative analysis employed in the case studies in order to investigate the relationship between revision and text improvement. The final section of the chapter describes the questionnaire analysis, which was carried out to investigate attitudes, benefits and constraints from the implementation of the model. Chapter 9 examines the statistical results from the analysis of the students" revisions. More specifically, it explores the revisions made by the students across tasks and the relationships between the features of the teacher feedback and these revisions. The analysis highlights patterns in the development of revision skills and positive correlations of student revisions with features of the teacher feedback. Chapter 10 looks at the descriptive data from the case studies of seven individual student writers. The analysis of this data illustrates how the specific students negotiated the revisions and sheds more light on the relationship between feedback, revision and text improvement. Chapter 11 contains the analysis of the students" answers to the questionnaire, which provide illuminative information about the feedback-related attitudes. In Chapter 12, the thesis reaches its final destination. The journey over the paths of literature exploration, data gathering and data analysis ends with reflections on the messages that emerge from the data analysis. The conclusion reached is that young students can learn how to revise their writing and focused feedback is a viable pedagogic option for teaching revision. In addition to discussing the findings, this final section considers the pedagogical implications for the teaching of writing and suggests possible avenues for further work.
Instructor feedback on written assignments is one of the most important elements in the writing process, especially for students writing in English as a foreign language. However, students are often critical of both the amount and quality of the feedback they receive. In order to better understand what makes feedback effective, this study explored the nature of students’ assessments of the educational alliance, and how their receptivity to, perceptions of, and decisions about using their instructors’ feedback differed depending on how strong they believed the educational alliance to be. This exploratory case study found that students not only assessed the quality of the educational alliance based on goal compatibility, task relevance, and teacher effectiveness, but that there was also a reciprocal relationship between these elements. Furthermore, students’ perceptions of the educational alliance directly influenced how they perceived the feedback, which made the instructor’s choice of feedback method largely irrelevant. Stronger educational alliances resulted in higher instances of critical engagement, intrinsic motivation, and feelings of self-efficacy. The multidirectional influence of goal, task, and bond mean that instructors who want to maximize their feedback efforts need to attend to all three.
The trends of industry 4.0 and the further enhancements toward an ever changing factory lead to more mobility and flexibility on the factory floor. With that higher need of mobility and flexibility the requirements on wireless communication rise. A key requirement in that setting is the demand for wireless Ultra-Reliability and Low Latency Communication (URLLC). Example use cases therefore are cooperative Automated Guided Vehicles (AGVs) and mobile robotics in general. Working along that setting this thesis provides insights regarding the whole network stack. Thereby, the focus is always on industrial applications. Starting on the physical layer, extensive measurements from 2 GHz to 6 GHz on the factory floor are performed. The raw data is published and analyzed. Based on that data an improved Saleh-Valenzuela (SV) model is provided. As ad-hoc networks are highly depended onnode mobility, the mobility of AGVs is modeled. Additionally, Nodal Encounter Patterns (NEPs) are recorded and analyzed. A method to record NEP is illustrated. The performance by means of latency and reliability are key parameters from an application perspective. Thus, measurements of those two parameters in factory environments are performed using Wireless Local Area Network (WLAN) (IEEE 802.11n), private Long Term Evolution (pLTE) and 5G. This showed auto-correlated latency values. Hence, a method to construct confidence intervals based on auto-correlated data containing rare events is developed. Subsequently, four performance improvements for wireless networks on the factory floor are proposed. Of those optimization three cover ad-hoc networks, two deal with safety relevant communication, one orchestrates the usage of two orthogonal networks and lastly one optimizes the usage of information within cellular networks.
Finally, this thesis is concluded by an outlook toward open research questions. This includes open questions remaining in the context of industry 4.0 and further the ones around 6G. Along the research topics of 6G the two most relevant topics concern the ideas of a network of networks and overcoming best-effort IP.
Willingness to pay and willingness to accept on a two-sided platform - The use case of DoBeeDo
(2019)
It is widely known that especially for technology-based start-ups, entrepreneurs need to set up the boundaries of the business and define the product/service to offer in order to minimize the risk of failure. The goal of this thesis is to not only emphasize the importance of the business model development and evaluation but also show an example customer validation process for an emerging start-up named DoBeeDo, which is a mobile app operating on a two-sided market. During the process of customer validation a survey has been conducted to evaluate the interest of the target groups as well as the fit of their expectations using the Willingness to Pay and Willingness to Accept measures. The paper includes an analysis and evaluation of the gathered results and assesses whether the execution of the Customer Development Model can be continued.
Um die Attraktivität eines Unternehmens für Bewerber zu steigern und die Zufriedenheit der Angestellten zu verbessern ist es heutzutage unumgänglich, eine Vielzahl an Work-Life-Balance Maßnahmen anzubieten. Doch die zeitlichen und finanziellen Kosten, welche deren Einführung verursacht, fordern eine Priorisierung der Maßnahmen. Zur Entwicklung einer solchen Empfehlung für Unternehmen untersucht diese Studie ob es Work-Life-Balance Maßnahmen gibt, welche einen höheren Einfluss auf die Arbeitszufriedenheit ausüben als andere, wie groß der relative Effekt von den Maßnahmen im Vergleich zu anderen arbeitsbezogenen und privaten Variablen auf die Veränderung der Arbeitszufriedenheit ist, ob es einen Zusammenhang zwischen der Effektivität einer Maßnahme und deren Nutzung gibt und ob es Unterschiede zwischen den Erwartungen der Angestellten und den Angeboten der Unternehmen gibt.
Diese Fragen sind in acht Forschungshypothesen formuliert, welche in einem quantitativen Design mit Daten von 289 Angestellten von fünfzehn verschiedenen deutschen Unternehmen aus einem Online-Fragebogen überprüft werden. Für die Bildung einer Hierarchie von Maßnahmen nach ihrem Einfluss auf die Arbeitszufriedenheit und die Untersuchung des relativen Effektes im Vergleich zu anderen Variablen wird eine multiple Regressionsanalyse verwendet, während für die Ermittlung der Unterschiede zwischen den Erwartungen der Angestellten und der Verfügbarkeit der Angebote T-Tests durchgeführt werden.
Unterstützung bei der Kindesbetreuung, Unterstützung bei ehrenamtlichen Tätigkeiten und Teambuilding-Events haben einen signifikant höheren Einfluss auf die Arbeitszufriedenheit als andere Maßnahmen, und die hypothetische Nutzung ist höher
als die tatsächliche Nutzung, was auf ein hohes Potenzial dieser Maßnahmen bezüglich der Verbesserung der Arbeitszufriedenheit durch deren Einführung schließen lässt. Darüber hinaus sind aus Sicht der Angestellten flexible Arbeitszeiten und Arbeitsorte sowie Freizeit- und Überstundenkonten die wichtigsten Maßnahmen, welche auch bereits flächendeckend in den befragten Unternehmen angeboten werden. Allgemein sind die Nutzung der verfügbaren Maßnahmen und die Anzahl der angebotenen Maßnahmen wichtiger im Hinblick auf die Arbeitszufriedenheit als die Art der Maßnahmen. Außerdem nehmen Work-Life-Balance Maßnahmen bei jüngeren Menschen einen höheren Stellenwert in Bezug auf die Arbeitszufriedenheit ein als bei älteren Menschen.
Men are currently underrepresented in traditionally female care-oriented (communal) engagement such as taking parental leave, whereas they are overrepresented in traditionally male (agentic) engagement such as breadwinning or leadership. We examined to what extent different prototypical representations of men affect men’s self-reported parental leave-taking intentions and more generally the future they can imagine for themselves with regard to work and care roles (i.e., their possible selves). We expected prototypes of men that combine the two basic stereotype dimensions of agency and communion to increase men’s communal intentions. In two experiments (N1 = 132, N2 = 233), we presented male participants with contrived newspaper articles that described the ideal man of today with varying degrees of agency and communion (between-subjects design with four conditions; combined agentic and communal vs. agentic vs. communal vs. control condition). Results of Experiment 1 were in line with the main hypothesis that especially presenting a combination of agency and communion increases men’s expectations for communal engagement: As compared to a control condition, men expected more to engage in caretaking in the future, reported higher parental leave-taking intentions, and tended to expect taking longer parental leave. Experiment 2 only partially replicated these findings, namely for parental leave-taking intentions. Both experiments additionally provided initial evidence for a contrast effect in that an exclusive focus on agency also increased men’s self-reported parental leave-taking intentions compared to the control condition. Yet, exclusively emphasizing communion in prototypes of men did not affect men’s communal intentions, which were high to begin with. We further did not find evidence for preregistered mechanisms. We discuss conditions and explanations for the emergence of these mixed effects as well as implications for the communication of gendered norms and barriers to men’s communal engagement more broadly.
Well-being is essential for all people. Therefore, important factors influencing people’s well-being must be investigated. Well-being is multifaceted and defined as, for example, psychological, emotional, mental, physical, or social well-being. Here, we focus on psychological well-being. The study aimed to analyze different aspects of connectedness as potential predictors of psychological well-being. For this purpose, we conducted a study examining the psychological well-being of 184 participants (130 women, 54 men, age: M = 31.39, SD = 15.24) as well as their connectedness with oneself (self-love), with others (prosocialness), with nature (nature connectedness), and with the transcendent (spirituality). First, significant positive correlations appeared between psychological well-being and self-love, nature connectedness, and spirituality. Furthermore, correlations between the four aspects of connectedness were significant, except for the relationship between self-love and prosocialness. A regression analysis revealed that self-love and nature connectedness positively predicted participants’ psychological well-being, while spirituality and prosocialness did not explain any incremental variance. The strong relationship between self-love and well-being was partly mediated by nature connectedness. Hence, self love, understood as a positive attitude of self-kindness, should be considered in more detail to enhance psychological well-being. Besides this, a more vital connectedness to the surrounding nature could benefit people’s well-being.
Despite widespread plans of big companies like Amazon and Google to develop unmanned delivery drones, scholarly research in this field is scarce, especially in the information systems field. From technical and legal perspectives, drone delivery in last-mile scenarios is in a quite mature state. However, estimates of user acceptance are varying between high skepticism and exaggerated optimism. This research follows a mixed method approach consisting both qualitative and quantitative research, to identify and test determinants of consumer delivery drone service adoption. The qualitative part rests on ten interviews among average consumers, who use delivery services on a regular basis. Insights gained from the qualitative part were used to develop an online survey and to assess the influence of associated risks on adoption intentions. The quantitative results show that especially financial and physical risks impede drone delivery service adoption. Delivery companies who are currently thinking about providing a delivery drone service may find these results useful when evaluating usage behaviors in the future market for delivery drones.
We are entering the 26th year from the time the World Wide Web (WWW) became reality. Since the birth of the WWW in 1990, the Internet and therewith websites have changed the way businesses compete, shifting products, services and even entire markets.
Therewith, gathering and analysing visitor traffic on websites can provide crucial information to un- derstand customer behavior and numerous other aspects.
Web Analytics (WA) tools offer a quantity of diverse functionality, which calls for complex decision- making in information management. Website operators implement Web Analytic tools such as Google Analytics to analyse their website for the purpose of identifying web usage to optimise website design and management. The gathered data leads to emergent knowledge, which provides new marketing opportunities and can be used to improve business processes and understand customer behavior to increase profit. Moreover, Web Analytics plays a significant role to measure performance and has therefore become an important component in web-based environments to make business decisions.
However, many small and medium –sized enterprises try to keep up with the web business competi- tion, but do not have the equivalent resources in manpower and knowledge to stand the pace, there- fore some even resign entirely on Web Analytics.
This research project aims to develop a Web Analytics framework to assist small and medium-sized enterprises in making better use of Web Analytics. By identifying business requirements of SMEs and connecting them to the functionality of Google Analytics, a Web Analytics framework with attending guidelines is developed, which guides SMEs on how to proceed in using Google Analytics to achieve actionable outcomes.
Aktuelle Schätzungen bestätigten, dass Binnengewässer eine erhebliche Menge Methan (CH4) und Kohlendioxid (CO2) sowohl auf regionaler Ebene, als auch global freisetzen. Jedoch basieren diese Schätzungen auf extrapolierten gemessenen Daten, ungenügender Auflösung der räumlich-zeitlichen Variabilität und es mangelt an Daten aus ariden und semi-ariden Gebieten, sowie den Kohlestoffquellen aus Kläranlagen.
Für die hier vorliegende Studie analysierten wir monatliche hydrologische und meteorologische Daten sowie Daten zur Wasserqualität von drei Stauseen aus dem Gebiet des unteren Jordans, die zur Trinkwassergewinnung und zur Bewässerung genutzt werden, und schätzten damit deren Emissionsrate an CO2 ab. Wir untersuchten den Effekt von Kläranlagen auf die umliegenden Gewässer im Hinblick auf CH4 und CO2-Emissionen indem wir saisonal aufgelöste Daten der Konzentration der beiden gelösten Gase in Kläranlagenauslässen und in Vorflutern von neun Kläranlagen in Deutschland analysierten. Mithilfe von Low-Cost-Methoden die die CO2-Transportrate und die Ausgasungsrate über Gasblasen messen, untersuchten wir die räumliche und zeitliche Variabilität der CH4 und CO2-Emissionen von aquatischen Süßwasser-Ökosystemen.
Unsere Schätzungen zeigen, dass Stauseen in semi-ariden Regionen CO2 übersättigt sind und somit CO2 an die Atmosphäre abgeben, also eine Netto-Quelle sind.
Die Größenordnung der beobachteten Transportraten der drei jordanischen Stauseen ist vergleichbar mit denen von tropischen Stauseen (3,3 g CO2 m-2 Tag-1). Die CO2-Emissionsrate ist abhängig von Änderungen der Wasseroberfläche, welche durch den Betrieb der Stauseen verursacht sind. Kläranlagen entlassen eine beachtlichen Menge an CH4 (30.9±40.7 kg Jahr-1) und CO2 (0.06±0.05 Gg Jahr-1) in ihre umgebenden Flüsse und Bäche. Deren Emissionsraten sind durch diese Einleitung der Kläranlagen um 1,2-fach für CH4 oder 8,6-fach für CO2 erhöht. Unsere Ergebnisse zeigen, dass sowohl die diffusive als auch die Gasblasenemissionsrate räumlich und zeitlich variabel ist, weshalb beide Emissionsraten bei zukünftigen Studien auch in der nötigen Auflösung gemessen werden sollten.
Wir schlussfolgern, dass bei zukünftigen Emissionsmessungen und –schätzungen von Binnengewässern auch die Gewässerbewirtschaftung, die Kohlenstoffquelle von Kläranlagen und die räumliche und zeitliche Variabilität der Emissionen beachtet werden sollten.
This paper introduces Vocville, a causal online game for learning vocabularies. I am creating this application for my master thesis of my career as a "Computervisualist" (computer visions) for the University of Koblenz - Landau. The application is an online browser game based on the idea of the really successful Facebook game FarmVille. The application is seperated in two parts; a Grails application manages a database which holds the game objects like vocabulary, a Flex/Flash application generates the actual game by using these data. The user can create his own home with everything in it. For creating things, the user has to give the correct translation of the object he wants to create several times. After every query he has to wait a certain amount of time to be queried again. When the correct answer is given sufficient times, the object is builded. After building one object the user is allowed to build others. After building enough objects in one area (i.e. a room, a street etc.) the user can activate other areas by translating all the vocabularies of the previous area. Users can also interact with other users by adding them as neighbors and then visiting their homes or sending them gifts, for which they have to fill in the correct word in a given sentence.
This work describes a novel software tool for visualizing anatomical segmentations of medical images. It was developed as part of a bachelor's thesis project, with a view to supporting research into automatic anatomical brain image segmentation. The tool builds on a widely-used visualization approach for 3D image volumes, where sections in orthogonal directions are rendered on screen as 2D images. It implements novel display modes that solve common problems with conventional viewer programs. In particular, it features a double-contour display mode to aid the user's spatial orientation in the image, as well as modes for comparing two competing segmentation labels pertaining to one and the same anatomical region. The tool was developed as an extension to an existing open-source software suite for medical image processing. The visualization modes are, however, suitable for implementation in the context of other viewer programs that follow a similar rendering approach.
The modified code can be found here: soundray.org/mm-segmentation-visualization.tar.gz.
Künstliche neuronale Netze sind ein beliebtes Forschungsgebiet der künst-
lichen Intelligenz. Die zunehmende Größe und Komplexität der riesigen
Modelle bringt gewisse Probleme mit sich. Die mangelnde Transparenz
der inneren Abläufe eines neuronalen Netzes macht es schwierig, effiziente
Architekturen für verschiedene Aufgaben auszuwählen. Es erweist sich als
herausfordernd, diese Probleme zu lösen. Mit einem Mangel an aufschluss-
reichen Darstellungen neuronaler Netze verfestigt sich dieser Zustand. Vor
dem Hintergrund dieser Schwierigkeiten wird eine neuartige Visualisie-
rungstechnik in 3D vorgestellt. Eigenschaften für trainierte neuronale Net-
ze werden unter Verwendung etablierter Methoden aus dem Bereich der
Optimierung neuronaler Netze berechnet. Die Batch-Normalisierung wird
mit Fine-tuning und Feature Extraction verwendet, um den Einfluss der Be-
standteile eines neuronalen Netzes abzuschätzen. Eine Kombination dieser
Einflussgrößen mit verschiedenen Methoden wie Edge-bundling, Raytra-
cing, 3D-Impostor und einer speziellen Transparenztechnik führt zu einem
3D-Modell, das ein neuronales Netz darstellt. Die Validität der ermittelten
Einflusswerte wird demonstriert und das Potential der entwickelten Visua-
lisierung untersucht.
Die automatische Detektion der Lage und Ausrichtung von Unterwasser-Kabeln oder -Pipelines in Kamerabildern ermöglicht es, Unterwasserfahrzeuge autonome Kontrollfahrten durchführen zu lassen. Durch Pflanzenwuchs auf und in der Nähe von Kabeln bzw. Pipelines wird deren visuelle Erfassung jedoch erschwert: Die Bestimmug der Lage über die Detektion von Kanten mit anschließender Linien-Extraktion schlägt oft fehl. Probabilistische Ansätze sind hier den deterministischen überlegen. Durch die Modellierung von Wahrscheinlichkeiten kann trotz geringer Anzahl von extrahierten Merkmalen eine Aussage über den Zustand des Systems getroffen werden. Diese Arbeit stellt ein neues auf Partikelfiltern basierendes Tracking-System für die Verfolgung von Kabeln und Pipelines in Bildsequenzen vor. Umfangreiche Experimente auf realistischen Unterwasser-Videos zeigen die Robustheit und Performanz des gewählten Ansatzes sowie Vorteile gegenüber vorangegangenen Arbeiten.
Virtual Goods + ODRL 2012
(2012)
This is the 10th international workshop for technical, economic, and legal aspects of business models for virtual goods incorporating the 8th ODRL community group meeting. This year we did not call for completed research results, but we invited PhD students to present and discuss their ongoing research work. In the traditional international group of virtual goods and ODRL researchers we discussed PhD research from Belgium, Brazil, and Germany. The topics focused on research questions about rights management in the Internet and e-business stimulation. In the center of rights management stands the conception of a formal policy expression that can be used for human readable policy transparency, as well as for machine readable support of policy conformant systems behavior up to automatic policy enforcement. ODRL has proven to be an ideal basis for policy expressions, not only for digital copy rights, but also for the more general "Policy Awareness in the World of Virtual Goods". In this sense, policies support the communication of virtual goods, and they are a virtualization of rules-governed behavior themselves.
Diese Arbeit verbindet die Geschäftstätigkeit von Winzern im Weinbau mit einer innovativen technologischen Anwendung des Internet of Things. Die Arbeit des Winzers kann dadurch unterstützt und bereichert werden – bis hin zu einer bisher nicht möglichen Bewirtschaftungsoptimierung, insbesondere bei einer Überwachung einzelner Lagen bis hin zum einzelnen Rebstock. Exemplarisch werden Temperatur-, Luftfeuchtigkeit- und Bodenfeuchtigkeit-Daten gemessen, übertragen, gespeichert und bereitgestellt. Durch ein modulares Design des Systems können heute verfügbare Sensoren und gleichartige Niedervolt-Sensoren, die künftig entwickelt werden, sofort eingesetzt werden.
Durch IoT-Geräte im Weinberg erhält der Winzer eine neue Qualität der Genauigkeit der Vorhersage auf Basis aktueller Zustandsdaten seines Weinbergs. Zusätzlich kann er bei unvorhergesehenen Wetterbedingungen sofort eingreifen. Die sofortige Nutzbarkeit der Daten wird durch eine Cloud Infrastruktur möglich gemacht. Dabei wird eine offene Service-Infrastruktur genutzt. Im Gegensatz zu anderen bisher veröffentlichten kommerziellen Ansätzen ist dabei die beschriebene Lösung quelloffen.
Als eigenständiger Bestandteil der Arbeit wurde ein physikalischer Prototyp zur Messung relevanter Parameter im Weinberg neu entworfen und bis zur Erfüllung der gesetzten Spezifikationen entwickelt. Die skizzierten Merkmale und Anforderungen an eine funktionierende Datensammlung und ein autonom übertragendes IoT-Gerät wurden entwickelt, beschrieben und die Erfüllung durch das Prototypgerät demonstriert. Durch Literaturrecherche und unterstützende, orientierende Interviews von Winzern wurden die Theorie und die praktische Anwendung synchronisiert und qualifiziert.
Für die Entwicklung des Prototyps wurden die allgemeinen Prinzipien der Entwicklung eines elektronischen Geräts befolgt, insbesondere die Entwicklungsregeln von Design Science Research und die Prinzipien des Quality Function Deployment. Als ein Merkmal des Prototyps wurden einige Prinzipien wie die Wiederverwendung von bewährten Konstruktionen und die Materialpreise der Bausteine des Prototypen wurden ebenfalls in Betracht gezogen (z. B. Gehäuse; Arduino; PCB). Teilezahl-Reduktionsprinzipien, Dekomplexierung und vereinfachte Montage, Prüfung und Vor-Ort-Service wurden in den Entwicklungsprozess durch den modularen Aufbau der funktionellen Weinberg- Gerätekomponenten integriert, wie es der Ansatz des innovativen Schaltschrankbau- System Modular-3 beschreibt.
Das Software-Architekturkonzept basiert auf einer dreischichtigen Architektur inklusive der TTN-Infrastruktur. Das Frontend ist als Rich-Web-Client realisiert, als ein WordPress- Plugin. WordPress wurde aufgrund der weiten Verbreitung über das gesamte Internet und der Einfachheit in der Bedienung ausgewählt, was eine schnelle und einfache Benutzereinweisung ermöglicht. Relevante Qualitätsprobleme wurden im Hinblick auf exemplarische Funktionalität, Erweiterbarkeit, Erfüllung von Anforderungen, Verwendbarkeit und Haltbarkeit des Gerätes und der Software getestet und diskutiert.
Der Prototyp wurde mit Erfolg im Labor und im Einsatzgebiet unter verschiedenen Bedingungen charakterisiert und getestet, um eine Messung und Analyse der Erfüllung aller Anforderungen durch die geplante und realisierte elektronische Konstruktion und Anordnung des Prototypen, zu ermöglichen.
Die entwickelte Lösung kann als Grundlage für eine zukünftige Anwendung und Entwicklung in diesem speziellen Anwendungsfall und ähnlichen Technologien dienen. Ein Ausblick möglicher zukünftiger Arbeiten und Anwendungen schließt diese Arbeit ab.