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Michal Mizera, Pawel Nowotarski, Aleksander Byrski and Marek Kisiel-Dorohinicki

Abstract

Evolutionary Multi-agent System introduced by late Krzysztof Cetnarowicz and developed further at the AGH University of Science and Technology became a reliable optimization system, both proven experimentally and theoretically. This paper follows a work of Byrski further testing and analyzing the efficacy of this metaheuristic based on popular, high-dimensional benchmark functions. The contents of this paper will be useful for anybody willing to apply this computing algorithm to continuous and not only optimization.

Open access

Md Meftahul Ferdaus, Sreenatha G. Anavatti, Matthew A. Garratt and Mahardhika Pratama

Abstract

Advanced and accurate modelling of a Flapping Wing Micro Air Vehicle (FW MAV) and its control is one of the recent research topics related to the field of autonomous MAVs. Some desiring features of the FW MAV are quick flight, vertical take-off and landing, hovering, and fast turn, and enhanced manoeuvrability contrasted with similar-sized fixed and rotary wing MAVs. Inspired by the FW MAV’s advanced features, a four-wing Nature-inspired (NI) FW MAV is modelled and controlled in this work. The Fuzzy C-Means (FCM) clustering algorithm is utilized to construct the data-driven NIFW MAV model. Being model free, it does not depend on the system dynamics and can incorporate various uncertainties like sensor error, wind gust etc. Furthermore, a Takagi-Sugeno (T-S) fuzzy structure based adaptive fuzzy controller is proposed. The proposed adaptive controller can tune its antecedent and consequent parameters using FCM clustering technique. This controller is employed to control the altitude of the NIFW MAV, and compared with a standalone Proportional Integral Derivative (PID) controller, and a Sliding Mode Control (SMC) theory based advanced controller. Parameter adaptation of the proposed controller helps to outperform it static PID counterpart. Performance of our controller is also comparable with its advanced and complex counterpart namely SMC-Fuzzy controller.

Restricted access

Anatoliy A. Martynyuk, Bogusław Radziszewski and Andrzej Szadkowski

Open access

Manfred Kühn and Matthias Bernt

Zusammenfassung

Der Beitrag untersucht die Stadtentwicklungsstrategien von Bremen und Leipzig im Hinblick auf ihren Umgang mit Migration. Die Leitfragen des Beitrages sind folgende: Auf welche Zielgruppen der Migration setzen die Stadtentwicklungspolitiken, um Wachstumsziele zu erreichen? Inwieweit erfolgt ein Perspektivenwechsel auf Migration vom Problem zum Potenzial der Stadtentwicklung? Unsere empirischen Ergebnisse zeigen, dass beide Städte in erster Linie auf die Zuwanderung von jungen und hochqualifizierten Arbeitskräften zielen. Beide Städte setzen außerdem auf die Zuwanderung von Studierenden und versuchen, diese nach ihrem Hochschulabschluss zu halten. Diese Orientierung ist allerdings nur schwer in die Praxis umzusetzen, denn in beiden Städten ist die Anzahl an Arbeitsmöglichkeiten für hochqualifizierte Kräfte begrenzt. Hinzu kommt der Stellenwert der Zuwanderung aus dem Ausland, die - obwohl sie das größte Wachstumssegment in den Zuwanderungsbilanzen ist - von beiden Städten zunächst weniger wahrgenommen wurde und erst in den letzten Jahren stärker an strategischer Bedeutung gewinnt. Sie wird in den Stadtentwicklungskonzepten beider Städte gleichzeitig als Potenzial und als Problem wahrgenommen. Der Beitrag diskutiert die Steuerungsdilemmata von Städten im Umgang mit Migration. Hierzu zählen wir vor allem die mangelnden Steuerungskapazitäten der Städte in Bezug auf die Gestaltung der Zuwanderungsgruppen, ein ,duales Regime' zwischen Wachstums- und Integrationspolitiken sowie häufig selektiv nur auf Teilgruppen der tatsächlichen Zuwanderung zielende Leitvorstellungen.

Open access

Elena Dück and Robin Lucke

Abstract

After the November 2015 terror attacks in Paris, the French government reacted swiftly by declaring a state of emergency. This state of emergency remained in place for over two years before it was ended in November 2017, only after being replaced by the new anti-terror legislation. The attacks as well as the government’s reactions evoked parallels to 9/11 and its aftermath. This is a puzzling observation when taking into consideration that the Bush administration’s reactions have been criticized harshly and that the US ‘War on Terror’ (WoT) was initially considered a serious failure in France. We can assume that this adaption of the discourse and practices stems from a successful establishment of the WoT macro-securitization. By using Securitization Theory, we outline the development of this macro-securitization by comparing its current manifestation in France against the backdrop of its origins in the US after 9/11. We analysed securitizing moves in the discourses, as well as domestic and international emergency measure policies. We find extensive similarities with view of both; yet there are diff ering degrees of securitizing terrorism and the institutionalisation of the WoT in the two states. This suggests that the WoT narrative is still dominant internationally to frame the risk of terrorism as an existential threat, thus enabling repressive actions and the obstruction of a meaningful debate about the underlying problems causing terrorism in the first place.

Open access

Piotr Boguta, Dariusz Juchnowicz, Paulina Wróbel-Knybel, Agnieszka Biała-Kędra and Hanna Karakuła-Juchnowicz

Abstract

Introduction: Warfarin has been considered as a “gold standard” in the prevention and treatment of thromboembolic events since 1954. Since the introduction of direct oral anticoagulants in the last few years (NOAC-Non-Vitamin K antagonist Oral Anticoagulants) prescriptions volume for apixaban, edoxaban, dabigatran and rivaroxaban have been gradually surpassing warfarin. The benefits include: anticoagulation from day one, fixed daily dosing, elimination for the need of international normalised ratio (INR) monitoring, fewer interactions with food and co-administered medicines with reduced risk of bleeding and better overall life quality.

Objectives: Assessing evidence for the safe use of Non-vitamin K Oral Anticoagulants (NOAC) with Selective Serotonin Reuptake Inhibitors (SSRI) and Serotonin and Noradrenaline Reuptake Inhibitors (SNRI).

Method: Review of literature published between 2014 and 2016 was made using the key words: Selective Serotonin Reuptake Inhibitor, Serotonin and Noradrenaline Reuptake Inhibitors, apixaban, dabigatran, edoxaban, rivaroxaban, bleeding, interaction, depression with time description from 2014 to 2018. Evidence within the literature was then compared with guidelines from the National Institute for Health and Care Excellence (UK), British National Formulary (UK), Clinical Excellence Commission (Australia), Thrombophilia and Anticoagulation Clinic (USA) and Summaries of Product Characteristics (SPC).

Results: 1. Serotonin plays a critical role in maintaining homeostasis. Use of SSRI/SNRI compromises its platelet reuptake increasing risk of bleeding.

2. Increased tolerability and safety of NOAC over Warfarin, although caution is advised when NOAC is used with SSRI/SNRI with less evidence suggesting pharmacodynamic interactions.

3. It is not recommended to use NOAC with strong CYP and P-gp inhibitors.

Conclusions: With limited literature evidence, caution is advised when co-prescribed NOACs with SSRI/SNRI, especially with other cofactors and interacting medicines further increasing risk of bleeding.

Open access

Mariela Patrignani, Guillermina A. Fagúndez and Cecilia E. Lupano

Abstract

Honey floral origin is determined by the harversting region, but anthropogenic factors as agriculture expansion might modify the environmental flora and consequently honey floral origin. Argentina is one of the most important honey producers worldwide which, since the 1990s, has undergone an important agriculture transformation by the adoption of transgenic crops like soybean (Glycine max). However, little is known about the effects of this anthropogenic activity on the floral origin of honey or the statistical tools that could be used to analyse it. The objective of the present study was to evaluate the impact that these environmental modifications have on the pollen spectrum of honey. In order to achieve this, thirty-two samples of blossom honey were collected from three different ecoregions of the Buenos Aires province: Parana Delta and Islands, Espinal, and Pampa, in two different years: 1999 and 2014. The pollen spectrum of honey samples was determined and the data obtained was analysed with multivariate statistical techniques. It could be concluded that the pollen composition of honeys from different ecoregions has significantly changed in the past years because of agriculture expansion and adaptation of transgenic crops (p=0.007). Honey samples harvested in 1999 were characterized by high values of Helianthus annuus, while in 2014 an important presence of Eryngium sp., Gleditsia triacanthos, Baccharis type, Trifolium sp. and Glycine max was observed. The present results show that honey palynological results and multivariate statistical analysis could be used as a preliminary attempt to evaluate environmental modifications.