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TSN, or Time Sensitive Networking, is becoming an essential technology for integrated networks, enabling deterministic and best effort traffic to coexist on the same infrastructure. In order to properly configure, run and secure such TSN, monitoring functionality is a must. The TSN standard already has some preparations to provide such functionality and there are different methods to choose from. We implemented different methods to measure the time synchronisation accuracy between devices as a C library and compared the measurement results. Furthermore, the library has been integrated into the ControlTSN engineering framework.
In an experience economy market competition in software branches is becoming more and more intense. Technical innovations, global retail practices and the multidimensional conception of experiences provide both opportunities and challenges for companies worldwide. Retailers strive for an optimized conversion rate, but poor UX still abound. Particularly Germany-based companies are less evolved in an international comparison of industrialized economies. The value of integrating users in the development process is recognized, but methodologies must carefully be incorporated into existing agile workflows. The goal of this study is to bridge the gaps between internal agency and external client and user interests. The contribution is four-fold: an overview of the current status of customer centricity in the E-Commerce branch of trade is provided (I). Based on this corpus, a methodical framework, aiming to incorporate the experience logic in UX practices within an agile project team, is presented (II). The framework is applied by a single case study - the shop relaunch of a motorbike accessory store (III). Finally, all interest groups (UX, development and project management) are incorporated in the qualitative content analysis (IV).
The proposed method includes identification and documentation of the elementary TRIZ inventive principles from the TRIZ body of knowledge, extension and enhancement of inventive principles by patents and technologies analysis, avoiding overlapping and redundant principles, classification and adaptation of principles to at least following categories such as working medium, target object, useful action, harmful effect, environment, information, field, substance, time, and space, assignment of the elementary inventive principles to the at least following underlying engineering domains such as universal, design, mechanical, acoustic, thermal, chemical, electromagnetic, intermolecular, biological, and data processing. The method includes classification of abstraction level of the elementary principles, definition of the statistical ranking of principles for different problem types, and specific engineering or non-technical domains, definition of strategies for selection of principles sets with high solution potential for predefined problems, automated semantic transformation of the elementary inventive principles into solution ideas, evaluation of automatically generated ideas and transformation of ideas to innovation or inventive concepts.
Energy and environment continue to be major issues of human mankind. This holds true on the regional, the national, and the global level. And it is one of the problems, where engineers and scientists in conjunction with political will and people's awareness, can find new approaches and solutions to save the natural resources and to make their use more efficient.
Message co chairmen
(2017)
Die direkte Vermarktung von Strom aus Wind und Sonne stellt einen wichtigen Schritt der Energiewende dar. Einerseits kann durch die Marktintegration die Unabhängigkeit von EEG-Subventionen gelingen. Andererseits wird über diese Mechanismen die Stromerzeugung an der Nachfrage orientiert, wodurch zur Stabilität des Stromnetzes beigetragen wird. Ein Beispiel dafür ist die lokale Vermarktung von PV-Strom in einem Mietshaus. Für deren Umsetzung benötigen die Akteure ein Mess- und Steuerungssystem, dass vor Ort Zähler- und Anlagendaten erfasst und die Abrechnung der Mieter vereinfacht. Außerdem sollte es Kennwerte wie beispielsweise den PV-Anteil berechnen und gegebenenfalls ein Blockheizkraftwerk steuern. Weder die Zählersysteme der Messstellenbetreiber noch die Steuerungssysteme von PV- oder Blockheizkraftwerken erfüllen diese Anforderungen ausreichend. In der Forschung ist man währenddessen bereits einen Schritt weiter und arbeitet an technischen Systemen, die für wesentlich komplexere Energiesystem- und Markttopologien ausgelegt werden. In dieser Arbeit werden die neuen technischen Anforderungen der Direktvermarktung in einem Mietshaus identifiziert und mit dem Stand aktueller Marktprodukte sowie dem System »OpenMUC« aus der Forschung verglichen.
The paper describes the methodology and experimental results for revealing similarities in thermal dependencies of biases of accelerometers and gyroscopes from 250 inertial MEMS chips (MPU-9250). Temperature profiles were measured on an experimental setup with a Peltier element for temperature control. Classification of temperature curves was carried out with machine learning approach.
A perfect sensor should not have thermal dependency at all. Thus, only sensors inside the clusters with smaller dependency (smaller total temperature slopes) might be pre-selected for production of high accuracy inertial navigation modules. It was found that no unified thermal profile (“family” curve) exists for all sensors in a production batch. However, obviously, sensors might be grouped according to their parameters. Therefore, the temperature compensation profiles might be regressed for each group. 12 slope coefficients on 5 degrees temperature intervals from 0°C to +60°C were used as the features for the k-means++ clustering algorithm.
The minimum number of clusters for all sensors to be well separated from each other by bias thermal profiles in our case is 6. It was found by applying the elbow method. For each cluster a regression curve can be obtained.