Correcting for site displacements at different levels of the Gauss-Markov model - a case study for geodetic VLBI

Author(s):  
Matthias Glomsda ◽  
Mathis Bloßfeld ◽  
Manuela Seitz ◽  
Florian Seitz
2021 ◽  
Vol 11 (10) ◽  
pp. 4620
Author(s):  
Niki Kousi ◽  
Christos Gkournelos ◽  
Sotiris Aivaliotis ◽  
Konstantinos Lotsaris ◽  
Angelos Christos Bavelos ◽  
...  

This paper discusses a digital twin-based approach for designing and redesigning flexible assembly systems. The digital twin allows modeling the parameters of the production system at different levels including assembly process, production station, and line level. The approach allows dynamically updating the digital twin in runtime, synthesizing data from multiple 2D–3D sensors in order to have up-to-date information about the actual production process. The model integrates both geometrical information and semantics. The model is used in combination with an artificial intelligence logic in order to derive alternative configurations of the production system. The overall approach is discussed with the help of a case study coming from the automotive industry. The case study introduces a production system integrating humans and autonomous mobile dual arm workers.


Author(s):  
Marius Ötting ◽  
Roland Langrock ◽  
Antonello Maruotti

AbstractWe investigate the potential occurrence of change points—commonly referred to as “momentum shifts”—in the dynamics of football matches. For that purpose, we model minute-by-minute in-game statistics of Bundesliga matches using hidden Markov models (HMMs). To allow for within-state dependence of the variables, we formulate multivariate state-dependent distributions using copulas. For the Bundesliga data considered, we find that the fitted HMMs comprise states which can be interpreted as a team showing different levels of control over a match. Our modelling framework enables inference related to causes of momentum shifts and team tactics, which is of much interest to managers, bookmakers, and sports fans.


2021 ◽  
Vol 11 (5) ◽  
pp. 2153
Author(s):  
Nadia Giuffrida ◽  
Maja Stojaković ◽  
Elen Twrdy ◽  
Matteo Ignaccolo

Container terminals are the main hubs of the global supply chain but, conversely, they play an important role in energy consumption, environmental pollution and even climate change due to carbon emissions. Assessing the environmental impact of this type of port terminal and choosing appropriate mitigation measures is essential to pursue the goals related to a clean environment and ensuring a good quality of life of the inhabitants of port cities. In this paper the authors present a Terminal Decision Support Tool (TDST) for the development of a container terminal that considers both operation efficiency and environmental impacts. The TDST provides environmental impact mitigation measures based on different levels of evolution of the port’s container traffic. An application of the TDST is conducted on the Port of Augusta (Italy), a port that is planning infrastructural interventions in coming years in order to gain a new role as a reference point for container traffic in the Mediterranean.


2020 ◽  
Vol 25 (1) ◽  
pp. 135-149
Author(s):  
Jan Siegemund

AbstractLibel played an important and extraordinary role in early modern conflict culture. The article discusses their functions and the way they were assessed in court. The case study illustrates argumentative spaces and different levels of normative references in libel trials in 16th century electoral Saxony. In 1569, Andreas Langener – in consequence of a long stagnating private conflict – posted several libels against the nobleman Tham Pflugk in different public places in the city of Dresden. Consequently, he was arrested and charged with ‘libelling’. Depending on the reference to conflicting social and legal norms, he had therefore been either threatened with corporal punishment including his execution, or rewarded with laudations. In this case, the act of libelling could be seen as slander, but also as a service to the community, which Langener had informed about potentially harmful transgression of norms. While the common good was the highest maxim, different and sometimes conflicting legally protected interests had to be discussed. The situational decision depended on whether the articulated charges where true and relevant for the public, on the invective language, and especially on the quality and size of the public sphere reached by the libel.


2012 ◽  
Vol 27 (4) ◽  
pp. 319-325 ◽  
Author(s):  
Franklin Obeng-Odoom

This Viewpoint article draws on the doctrine of eminent domain (or compulsory purchase) as an analytical framework to analyse the regional and local impacts of a new source of oil. Sekondi-Takoradi, an oil city located in Ghana, West Africa, is used as a case study to explore the differentiated experiences of local people. The article shows that, although there are complex distributional issues that require different levels of compensation and betterment to be assessed and paid for, it is unlikely that they will, in fact, even be considered.


Author(s):  
Bezaleel Joy Murchante Danay ◽  
Zephaniah Dela Cruz Danay ◽  
Cherry Colesio Escarilla ◽  
Jimmy Bernabe Maming

The Covid-19 pandemic brought massive devastations to the different levels of society. The World Travel and Tourism Council had recently warned that Covid-19 pandemic could lead to a cut of 50 million jobs worldwide in the travel and tourism industry. A study conducted by Oxford reveals that Asia will be vilest to be affected by the pandemic and it would take time to recover its economy (Dogra, 2020). This means a wider and greater impacts to the different industries including the tourism sector. The study aims to explore the coping mechanisms of hospitality industry workers in Boracay Island during the Covid-19 pandemic particularly on their experiences during the Covid-19 pandemic and to determine the coping mechanisms of hospitality workers in Boracay Island being affected by the pandemic. The case study method through a qualitative analysis using Robert Yin's approach in the data analysis procedure to explore the data from the experiences of the key informants from the hospitality industry was used. Themes came out from the construct of the key informants like (1) hospitality industry workers experienced mental health, social, and economic issues, (2) The pandemic opens new opportunities and ways to cope with its effects. The output of this research is the proposed Danay, Danay, Escarilla, and Maming Model for Coping Mechanisms of Hospitality Industry workers during the Covid-19 Pandemic.


2017 ◽  
Vol 10 (2) ◽  
pp. 100 ◽  
Author(s):  
Jorge Cevallos Bravo ◽  
Eder A. Intriago ◽  
Jhonny Villafuerte Holguin ◽  
Gustavo Molina Garzon ◽  
Luis Ortega Arcia

This quantitative research aims to examine how different levels of motivation relate to frequency of occurrence of autonomous language learning activities undertaken by undergraduate students. Eight hundred and sixty-two college students from 10 vocational training programs of a public university located in Ecuador, South America, participated in this study. Spratt’s questionnaire that regards ‘autonomy and motivation’ as a cyclical interaction in the language learning process, was updated by the researchers, adding digital education elements. The data were analyzed using the program SPSS v24.0.0 The results showed that there was a significant relationship between: the language learning stimulation generated by professors and the participants’ learning attitudes. In addition, it was determined that the most frequent language practices in which the participants showed greatest autonomy were: listening to songs in English language, worrying about the correct pronunciation, and noting down interesting words or expressions in English.


i-com ◽  
2015 ◽  
Vol 14 (3) ◽  
Author(s):  
Raquel Oliveira ◽  
Sophie Dupuy-Chessa ◽  
Gaëlle Calvary

AbstractInteractive systems have largely evolved over the past years. Nowadays, different users can interact with systems on different devices and in different environments. The user interfaces (UIs) are expected to cope with such variety. Plastic UIs have the capacity to adapt to changes in their context of use while preserving usability. Such capability enhances UIs, however, it adds complexity on them. We propose an approach to verifying interactive systems considering this adaptation capability of the UIs. The approach applies two formal techniques: model checking, to the verification of properties over the system model, and equivalence checking, to compare different versions of a UI, thereby identifying different levels of UI equivalence. We apply the approach to a case study in the nuclear power plant domain in which several UI are analyzed, properties are verified, and the level of equivalence between them is demonstrated.


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