Intention-Driven Screenography

The visual design development of Web Information Systems is a complex task. At present, the process is mainly based on experiences and seems to be an immovable part of art. Typically, occurs a late consideration of graphical issues that results in inflexibility and cause problems for extension and change management. Database and software systems are mainly based on development phases such as requirement acquisition and elicitation and conceptual modelling. Moreover, users, their preferences and portfolio are taken into consideration. We show in this preprint that these approaches can be generalised to website presentation. We use methods developed for programming in the large, e.g. patterns. We can map patterns to conceptualisations of web page layout, i.e. grids. Patterns shall help us to reuse concepts. This paper introduces the concept of pattern and clarifies their structure and task for the whole development. Because the WIS development process is based on six dimensions, we initially introduce development dimensions and show the seamless integration of the pattern-based approach. We call the art of website layout screenography. Screenography extends web application engineering by scenographic and dramaturgic aspects and intends to support the interaction between system and user. Screenography aims at an individualised, decorated playout in consideration of intention, user profiles and portfolios, provider aims, context, equipment, functionality and the storyline progress. The users orientation of WIS requires the deep integration of user concerns, tasks and expectations into screenography. Therefore, this paper develops concepts of intention- driven screenography

Beitrag zur selbsteinstellenden Ladedruckregelung von aufgeladenen Ottomotoren

In der Fahrzeugindustrie nimmt die Einstellung von Steuerungen und Regelungen einen hohen Stellenwert ein. Diese Arbeit beschäftigt sich mit Verfahren zur Selbsteinstellung solcher Parameter. Die entwickelten Verfahren dienen zur Unterstützung der Applikation im Fahrzeug und sollen die Applikationszeit reduzieren. Der verfolgte Ansatz baut auf der Theorie der iterativ lernenden Regelung (ILR) auf und ermöglicht so eine signalbasierte Vorgehensweise ohne zusätzlichen Modellierungsaufwand. Der Referenzprozess ist die Ladedruckregelung eines aufgeladenen Ottomotors

Cannabis Use Patterns and Their Association with DSM-IV Cannabis Dependence and Gender

Aims: To investigate the gender differences in the patterns of cannabis use (CU), namely frequency, times of day, social context and methods and in their association with DSM-IV cannabis dependence. Methods: A sample of 3,904 students from German universities was recruited via an internet survey. Logistic regressions and associated areas under the ROC curve (AUC) were calculated among current cannabis users (at least once a month, n = 843). Results: CU using a water pipe was more often reported by males (50 vs. 34.6%). Usual CU ‘before going to sleep at night’ was more often reported by females (47.3 vs. 35.7%). Most CU patterns showed a similar association with DSM-IV cannabis dependence in both genders. The association of CU ‘with strangers’ was stronger in females (AUC 0.68 vs. AUC 0.56). Slightly different multiple models were found (females AUC 0.86, males AUC 0.77). Conclusions: There are considerable gender differences in the CU patterns and, thus, in the way CU functions. In the association of CU patterns with cannabis dependence, the similarities are rather great. Examining the CU patterns might make a considerable contribution to the better detection of high-risk population segments for prevention and early intervention in both genders.Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich

Cortisol response under low intensity exercise during cognitive-behavioral therapy is associated with therapeutic outcome in panic disorder: An exploratory study

Objectives: Patients with Panic Disorder (PD) show an abnormal stress-induced functioning of the Hypothalamic-Pituitary-adrenal (HPA)-axis. Different protocols for stress induction are of rather low relevance for the psychotherapeutic treatment. In practice, interoceptive exposure is often realized as Low Intensity Exercise (LIE), as compared to an incremental cycle exercise test to exhaustion. Currently, it is not known, whether LIE displays an effective interoceptive stressor 1.) leading to a significant anxiety induction; 2.) a comparable HPA- and Sympathetic-Adreno-Medullar (SAM)-axis response in both patients and healthy controls; 3.) stress responses under LIE are associated with treatment outcomes. Patients and methods: N = 20 patients with PD and n = 20 healthy controls were exposed to ten minutes of LIE on an exercise bike. LIE was applied as part of the interoceptive exposure, during an intensive Cognitive-Behavioral Therapy (CBT) in a day clinic. Heart rate was monitored and salivary cortisol samples collected. Before and after the LIE, state anxiety/ arousal were assessed. In order to evaluate psychopathology, the Panic and Agoraphobia Scale, Mobility Inventory, Agoraphobic Cognitions Questionnaire and Body Sensations Questionnaire were applied, before (T1) and after five weeks (T2) of an intensive CBT. Results: LIE led to a significant and similar heart rate increase in both groups. Cortisol decreased over time in both groups, especially in male patients. A higher psychopathology before, and after CBT, was associated with a significantly lower cortisol response under LIE. Conclusions: In the present study, LIE led to a divergent stress response: while there was a significant heart rate increase, cortisol decreased over time, particularly in male patients. A lower reactivity of the HPA-axis seems to be associated with a lower treatment outcome, which may affect extinction based learning. The findings suggest, that interoceptive stimuli should be designed carefully in order to be potent stressors

Automatic tracking of Li-Fi links for wireless industrial ethernet

The ongoing digitalization of our environment leads to continuously increasing data traffic. Especially in industrial environments, automation is an omnipresent trend. Autonomous systems incorporate a rising amount of sensors as well as continuous machine-to-machine (M2M) communication. Wireless communications can simplify the data transmission and enable connectivity to dynamic parts like moving, vibrating or rotating components. Due to the open nature of the communication channel, engineers have to face a number of challenges, e.g. security issues, interferences and regulation of irradiated power. Radio frequency (RF) technologies are used in manifold applications, but in certain scenarios they are still cumbersome, because of signal interference and hard real-time requirements. The so-called Li-Fi technology is ideal for autonomous systems in Industry 4.0 since optical communications offer reliable and high data rate communication links with low-latency characteristics. However, the engineer typically has to face a trade-off between the link’s range, coverage and data rate. This contradiction can be overcome by forming a small, steerable spot. In this paper we present a compact Li-Fi tracking system based on a steerable optical wireless link, which enables real-time full-duplex bi-directional data communication with a data rate of 1.289 Gbit/s. This approach shows the feasibility and handling of an energy efficient wireless link, thanks to its 12-bit-precise beam alignment by using micro mirrors. We describe the optical setup and introduce a tracking algorithm which enables fully autonomous link establishment and thus simple installation. Data rate measurements underline the high performance of the wireless link whereas the system’s mobility is characterized by measurements of the settle time of the steered beam

Total Internal Reflection Lens for Optical Wireless Receivers

This work considers the use of a freeform total internal reflection (TIR) lens for optical concentration and provides for the first time experimental results in the context of optical wireless communications (OWC). The lens is placed on a surface-mounted device (SMD) avalanche photodiode (APD) to minimize position tolerances and simplify assembly. The lens achieves a concentration ratio of go = 44.7 (16.5 dB) within the FOV center and exhibits an acceptance angle of ±5°. The TIR lens approach is validated by comparing eye diagrams and bit error ratios (BER) of a receiver with and without a TIR lens. For the measurements, non-return-to-zero (NRZ) on-off keying (OOK) signals are transmitted with a data rate of 1.289 Gbit/s