Torsten Ullrich
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View article: Association Between Smoking and Opioid Requirement and Pain Intensity in the Early Postoperative Period: A Meta-Analysis
Association Between Smoking and Opioid Requirement and Pain Intensity in the Early Postoperative Period: A Meta-Analysis Open
Despite low-quality evidence due to non-randomized study designs, this meta-analysis demonstrates that patients who smoke have significantly higher postoperative opioid requirements and pain scores than nonsmokers. These findings highlight…
View article: A Comprehensive Data Maturity Model for Data Pre-Analysis
A Comprehensive Data Maturity Model for Data Pre-Analysis Open
Data analysis is widely used in research and industry where there is a need to extract information from data. A significant amount of time within a data analysis project is required to prepare the data for subsequent analysis. This paper p…
View article: A review of time-series analysis for cyber security analytics: from intrusion detection to attack prediction
A review of time-series analysis for cyber security analytics: from intrusion detection to attack prediction Open
Understanding the current threat landscape as well as timely detection of imminent attacks are primary objectives of cyber security. Through time-series modeling of security data, such as event logs, alerts, or incidents, analysts take a s…
View article: A Novel Approach Using Non-Experts and Transformation Models to Predict the Performance of Experts in A/B Tests
A Novel Approach Using Non-Experts and Transformation Models to Predict the Performance of Experts in A/B Tests Open
The European Union is committed to modernising and improving air traffic management systems to promote environmentally friendly air transport. However, the safety-critical nature of ATM systems requires rigorous user testing, which is hamp…
View article: Green Space Development Monitoring for the Smart City: A Novel AI Based Methodology for the Assessment of Urban Green
Green Space Development Monitoring for the Smart City: A Novel AI Based Methodology for the Assessment of Urban Green Open
Since 2008 more than half of the world's population lives in cities with a growing tendency (United Nations 2019).Already now the building sector is energy intensive and accounts for 40% of nations' total energy consumption.As roofs take u…
View article: Impact of the pandemic and its containment measures in Europe upon aspects of affective impairments: a Google Trends informetrics study
Impact of the pandemic and its containment measures in Europe upon aspects of affective impairments: a Google Trends informetrics study Open
Background In late 2019, a new virus began spreading in Wuhan, China. By the end of 2021, more than 260 million people worldwide had been infected and 5.2 million people had died because of the severe acute respiratory syndrome coronavirus…
View article: An Automatic Process for the Application of Building Permits
An Automatic Process for the Application of Building Permits Open
Building Information Modeling is an essential element for the digitization of the construction industry and forms the basis for the exchange of model-based data. In order to exploit the full potential of digitization, it is necessary for a…
View article: Product Tests in Virtual Reality: Lessons Learned during Collision Avoidance Development for Drones
Product Tests in Virtual Reality: Lessons Learned during Collision Avoidance Development for Drones Open
Virtual reality (VR) and real-world simulations have become an important tool for product development, product design, and product tests. Product tests in VR have many advantages, such as reproducibility and shortened development time. In …
View article: Analysing the influence of different temporal resolutions of water consumption data for leakage detection and localisation
Analysing the influence of different temporal resolutions of water consumption data for leakage detection and localisation Open
<p>Digital water meters are increasingly installed in water distribution networks providing detailed information about the water consumption in households at a high temporal resolution (e.g., ranging from seconds to daily readings). …
View article: On the Autoregressive Time Series Model Using Real and Complex Analysis
On the Autoregressive Time Series Model Using Real and Complex Analysis Open
The autoregressive model is a tool used in time series analysis to describe and model time series data. Its main structure is a linear equation using the previous values to compute the next time step; i.e., the short time relationship is t…
View article: Real-world String Comparison
Real-world String Comparison Open
In many languages a string comparison is a pitfall for beginners. With any Unicode string as input, a comparison often causes problems even for advanced users. The semantic equivalence of different characters in Unicode requires a normaliz…
View article: Google Trends for Pain Search Terms in the World’s Most Populated Regions Before and After the First Recorded COVID-19 Case: Infodemiological Study
Google Trends for Pain Search Terms in the World’s Most Populated Regions Before and After the First Recorded COVID-19 Case: Infodemiological Study Open
Background Web-based analysis of search queries has become a very useful method in various academic fields for understanding timely and regional differences in the public interest in certain terms and concepts. Particularly in health and m…
View article: Vertex Climax: Converting Geometry into a Non-nanifold Midsurface
Vertex Climax: Converting Geometry into a Non-nanifold Midsurface Open
The physical simulation of CAD models is usually performed using the finite elements method (FEM). If the input CAD model has one dimension that is significantly smaller than its other dimensions, it is possible to perform the physical sim…
View article: A new grid-based midsurface generation algorithm
A new grid-based midsurface generation algorithm Open
A midsurface consists of surface elements (2D) representing three-dimensional, thin solids whose local thickness is small compared to its other dimensions. These simplified representations allow a significant acceleration of almost all phy…
View article: Time-unfolding Object Existence Detection in Low-quality Underwater Videos using Convolutional Neural Networks
Time-unfolding Object Existence Detection in Low-quality Underwater Videos using Convolutional Neural Networks Open
Monitoring the environment for early recognition of changes is necessary for assessing the success of renaturation measures on a facts basis. It is also used in fisheries and livestock production for monitoring and for quality assurance. T…
View article: Scene Understanding and 3D Imagination: A Comparison between Machine Learning and Human Cognition
Scene Understanding and 3D Imagination: A Comparison between Machine Learning and Human Cognition Open
Spatial perception and three-dimensional imagination are important characteristics for many construction tasks in civil engineering. In order to support people in these tasks, worldwide research is being carried out on assistance systems b…
View article: Digital Planning, Construction Submission and Approval Processes in Austria
Digital Planning, Construction Submission and Approval Processes in Austria Open
In Austria, standard A6241-2 created the normative basis for the exchange of model-based data in building construction and civil engineering in 2015. This technology - known internationally as Building Information Modelling (BIM) - is an e…
View article: Open Problems in 3D Model and Data Management
Open Problems in 3D Model and Data Management Open
In interdisciplinary, cooperative projects that involve different representations of 3D models (such as CAD data and simulation data), a version problem can occur: different representations and parts have to be merged to form a holistic vi…
View article: 3D Model Representations and Transformations in the Context of Computer-Aided Design: a State-of-the-Art Overview
3D Model Representations and Transformations in the Context of Computer-Aided Design: a State-of-the-Art Overview Open
Within a virtual world, either in virtual reality or in a simulation environment, the digital counterparts of real objects are described by mathematical and computational models. Depending on the purpose, the field of application, and the …
View article: State-of-the-art Overview on 3D Model Representations and Transformations in the Context of Computer-Aided Design
State-of-the-art Overview on 3D Model Representations and Transformations in the Context of Computer-Aided Design Open
Within a virtual world, either in virtual reality or in a simulation environment, the digital counterparts of real objects are described by mathematical and computational models. Depending on the purpose, the field of application, and the …
View article: Search & Retrieval in CAD Databases - A User-centric State-of-the-Art Overview
Search & Retrieval in CAD Databases - A User-centric State-of-the-Art Overview Open
This article presents a state-of-the-art overview on shape, information and design retrieval systems in the context of CAD engineering. In contrast to existing surveys, we classify the different approaches from a CAD application user point…
View article: Building a Driving Simulator with Parallax Barrier Displays
Building a Driving Simulator with Parallax Barrier Displays Open
In this paper, we present an optimized 3D stereoscopic display based on parallax barriers for a driving simulator. The overall purpose of the simulator is to enable user studies in a reproducible environment under controlled conditions to …