scholarly journals Hysteresis and controllability of affine driftless systems: some case studies

2020 ◽  
Vol 15 ◽  
pp. 55
Author(s):  
Fabio Bagagiolo ◽  
Marta Zoppello

We investigate the controllability of some kinds of driftless affine systems where hysteresis effects are taken into account, both in the realization of the control and in the state evolution. In particular we consider two cases: the one when hysteresis is represented by the so-called play operator, and the one when it is represented by a so-called delayed relay. In the first case we prove that, under some hypotheses, whenever the corresponding non-hysteretic system is controllable, then we can also, at least approximately, control the hysteretic one. This is obtained by some suitably constructed approximations for the inputs in the hysteresis operator. In the second case we prove controllability for a generic hysteretic delayed switching system. Finally, we investigate some possible connections between the two cases.

Medicina ◽  
2021 ◽  
Vol 57 (3) ◽  
pp. 240
Author(s):  
Sarah Humboldt-Dachroeden ◽  
Alberto Mantovani

Background: One Health is a comprehensive and multisectoral approach to assess and examine the health of animals, humans and the environment. However, while the One Health approach gains increasing momentum, its practical application meets hindrances. This paper investigates the environmental pillar of the One Health approach, using two case studies to highlight the integration of environmental considerations. The first case study pertains to the Danish monitoring and surveillance programme for antimicrobial resistance, DANMAP. The second case illustrates the occurrence of aflatoxin M1 (AFM1) in milk in dairy-producing ruminants in Italian regions. Method: A scientific literature search was conducted in PubMed and Web of Science to locate articles informing the two cases. Grey literature was gathered to describe the cases as well as their contexts. Results: 19 articles and 10 reports were reviewed and informed the two cases. The cases show how the environmental component influences the apparent impacts for human and animal health. The DANMAP highlights the two approaches One Health and farm to fork. The literature provides information on the comprehensiveness of the DANMAP, but highlights some shortcomings in terms of environmental considerations. The AFM1 case, the milk metabolite of the carcinogenic mycotoxin aflatoxin B1, shows that dairy products are heavily impacted by changes of the climate as well as by economic drivers. Conclusions: The two cases show that environmental conditions directly influence the onset and diffusion of hazardous factors. Climate change, treatment of soils, water and standards in slaughterhouses as well as farms can have a great impact on the health of animals, humans and the environment. Hence, it is important to include environmental considerations, for example, via engaging environmental experts and sharing data. Further case studies will help to better define the roles of environment in One Health scenarios.


Author(s):  
Mónica Ruiz-Casares ◽  
Shelene Gentz ◽  
Jesse Beatson

Processes associated with the formation of child-headed households (CHH) are complex. Findings are mixed with regard to the impact of living in CHHs on children. On the one hand, children in CHHs do not necessarily have more unmet basic needs than do peers in adult-headed households and, in fact, have more opportunities to develop self-esteem and care for others. Nonetheless, children in CHHs confront specific challenges to their well-being. This chapter summarizes the state of the literature pertaining to CHHs, with a particular focus on CHHs as indicators of “the breakdown of the extended family” as a safety net. The authors present two case studies from Namibia that illustrate changes in children’s relationships and other aspects of the CHH experience and explore immediate and deferred reciprocity as a measure of accessibility and strength of their relationships and as an indicator of the changing status of children and family dynamics.


Porta Aurea ◽  
2020 ◽  
pp. 257-274
Author(s):  
Magdalena Staręga

This article discusses widely unknown designs of the Evangelical church in the village of Orunia near Gdańsk from 1816–1819. The concepts preserved in the State Archive in Gdańsk contain as many as eight variants of the reconstruction of the meeting house destroyed during a siege in 1813. The author of these concepts was the contemporary city architect Carl Samuel Held. As a student of Carl Gotthard Langhans (1732–1808), one of the greatest Prussian architects of that time, Held consistently used classicist forms throughout his body of work. His first two designs for the reconstruction of the church in question were in line with the so-called revolutionary classicism. The following six neo-Gothic variants constituted a formal exception in his oeuvre. Moreover, the case of the Orunia church was the only time he ever attempted to design a sacral building. The clumsiness in the use of neo-Gothic forms, as well as the inability to fit into the assumed financial framework contributed to the rejection of Held’s designs. Eventually, the project by August von Gersdorff verified by the head of the Higher Construction Deputy Karl Friedrich Schinkel was the one that was implemented. The construction was completed in 1823. The forms used in the building exhibit inspiration drawn from the Teutonic castle in Malbork. The prime mover behind their use was the Oberpräsident of the Province of West Prussia Theodor von Schön, promoter of the restoration work at the castle. The church in Orunia is the first case of a building with neo-Gothic features in Gdańsk and its area, as well as the first construction with forms intentionally referring to the Malbork Castle, a landmark symbolizing the essence of Germanity.


2019 ◽  
Vol 63 (3-4) ◽  
pp. 16-24
Author(s):  
Michael Wögerbauer

Based on two intertwined case studies, this essay shows the economic importance of almanacs for Bohemian printing houses under the reign of Maria Theresa (1740–1780). The first case study focuses on the printing house of Sophie Rosenmüller (Kirchner-Klauser) in Prague, which during the 18th century published the only two newspapers in Bohemia, one in German and one in Czech. After her husband’s death (1745), Sophie Rosenmüller asked the Viennese administration for the permission to close the loss-making Cžeský postylion neboližto NOWJNY Cžeské [Bohemian Postilion or Czech Newspaper], which never had more than twelve subscribers per year. But Empress Maria Theresa insisted on the existence of the Czech newspaper. As compensation, she granted Sophie Rosenmüller privileges to publish highly profitable almanacs. In 1771, the empress finally agreed to suspending the paper. The second study deals with the severe impact of Maria Theresa’s religious reforms on provincial printing houses, like the one of Ignaz Hilgartner in the South Bohemian town of Jindřichův Hradec. Thoroughly discussed short-term issues included the reduction of the number of holidays and the fact that they were no longer to be printed in red in almanacs; more severe problems involved the loss of important clients, caused by the disbanding of some secular religious fraternities and foremost the Jesuits, and the end of some important genres, e.g. school dramas with their printed synopsis; the biggest problem was caused by the societalisation of the school system and the printing of textbooks. Due to the lack of a secular literary market (universities, enlightened clientele) in South Bohemia, Hilgartner saw only two possibilities to compensate for these losses: either to move his office to Prague or to assume the privileges of Sophie Rosenmüller (and especially her best-selling almanacs) after her death in 1780. Nevertheless, both possibilities were denied to him.


2020 ◽  
Vol 2020 (10-2) ◽  
pp. 86-98
Author(s):  
Ivan Popov

The paper deals with the organization and decisions of the conference of the Minister-Presidents of German lands in Munich on June 6-7, 1947, which became the one and only meeting of the heads of the state governments of the western and eastern occupation zones before the division of Germany. The conference was the first experience of national positioning of the regional elite and clearly demonstrated that by the middle of 1947, not only between the allies, but also among German politicians, the incompatibility of perspectives of further constitutional development was existent and all the basic conditions for the division of Germany became ripe. Munich was the last significant demonstration of this disunity and the moment of the final turn towards the three-zone orientation of the West German elite.


Author(s):  
Sukho Lee ◽  
John van den Biggelaar ◽  
Marc van Veenhuizen

Abstract Laser-based dynamic analysis has become a very important tool for analyzing advanced process technology and complex circuit design. Thus, many good reference papers discuss high resolution, high sensitivity, and useful applications. However, proper interpretation of the measurement is important as well to understand the failure behavior and find the root cause. This paper demonstrates this importance by describing two insightful case studies with unique observations from laser voltage imaging/laser voltage probing (LVP), optical beam induced resistance change, and soft defect localization (SDL) analysis, which required an in-depth interpretation of the failure analysis (FA) results. The first case is a sawtooth LVP signal induced by a metal short. The second case, a mismatched result between an LVP and SDL analysis, is a good case of unusual LVP data induced by a very sensitive response to laser light. The two cases provide a good reference on how to properly explain FA results.


Author(s):  
Jong Hak Lee ◽  
Jong Eun Kim ◽  
Chang Su Park ◽  
Nam Il Kim ◽  
Jang Won Moon ◽  
...  

Abstract In this work, a slightly unetched gate hard mask failure was analyzed by nano probing. Although unetched hard mask failures are commonly detected from the cross sectional view with FIB or FIB-TEM and planar view with the voltage contrast, in this case of the very slightly unetched hard mask, it was difficult to find the defects within the failed area by physical analysis methods. FIB is useful due to its function of milling and checking from the one region to another region within the suspected area, but the defect, located under contact was very tiny. So, it could not be detected in the tilted-view of the FIB. However, the state of the failure could be understood from the electrical analysis using a nano probe due to its ability to probe contact nodes across the fail area. Among the transistors in the fail area, one transistor’s characteristics showed higher leakage current and lower ON current than expected. After physical analysis, slightly remained hard mask was detected by TEM. Chemical processing was followed to determine the gate electrode (WSi2) connection to tungsten contact. It was also proven that when gate is floated, more leakage current flows compared to the state that the zero voltage is applied to the gate. This was not verified by circuit simulation due to the floating nodes.


Author(s):  
Mai Zhihong ◽  
Ng Tsu Hau ◽  
Dawood M. Khalid ◽  
Tan Pik Kee ◽  
Jeffrey Lam

Abstract IP protection is of major importance for a semiconductor company and only limited information is made available for device debugging for the product outsourced to a foundry. In order to position ourselves better in the ever competitive semiconductor industry, with the consideration of IP protection, we have to provide the customers with the Si debugging capability and device/chip verification services in foundry. This paper explores the Si debugging methodology and technique in a foundry. Two case studies are presented and discussed. The first case illustrates the isolation of the failure location by InGaAs microscopy, upon which the failure was identified to be caused by a latch-up issue. In the second case, due to confidentiality considerations from the customer, full information could not be provided to the foundry for silicon debugging. The paper illustrates the ability to effectively debug a failure despite being constrained by limited information from the customer.


2011 ◽  
Vol 1 (3) ◽  
pp. 34-66
Author(s):  
Joyce Valdovinos

The provision of water services has traditionally been considered a responsibility of the state. During the late 1980s, the private sector emerged as a key actor in the provision of public services. Mexico City was no exception to this trend and public authorities awarded service contracts to four private consortia in 1993. Through consideration of this case study, two main questions arise: First, why do public authorities establish partnerships with the private sector? Second, what are the implications of these partnerships for water governance? This article focuses, on the one hand, on the conceptual debate of water as a public and/or private good, while identifying new trends and strategies carried out by private operators. On the other hand, it analyzes the role of the state and its relationships with other actors through a governance model characterized by partnerships and multilevel networks.Spanish La provisión del servicio del agua ha sido tradicionalmente considerada como una responsabilidad del Estado. A finales de la década de 1980, el sector privado emerge como un actor clave en el suministro de servicios públicos. La ciudad de México no escapa a esta tendencia y en 1993 las autoridades públicas firman contratos de servicios con cuatro consorcios privados. A través de este estudio de caso, dos preguntas son planteadas: ¿Por qué las autoridades públicas establecen partenariados con el sector privado? ¿Cuáles son las implicaciones de dichos partenariados en la gobernanza del agua? Este artículo aborda por una parte, el debate conceptual del agua como bien público y/o privado, identificando nuevas tendencias y estrategias de los operadores privados. Por otra parte, se analizan el rol y las relaciones del Estado con otros actores a través de un modelo de gobernanza, definido en términos de partenariados y redes multi-niveles.French Les services de l'eau ont été traditionnellement considérés comme une responsabilité de l'État. À la fin des années 1980, le secteur privé est apparu comme un acteur clé dans la fourniture de certains services publics. La ville de Mexico n'a pas échappé à cette tendance et en 1993, les autorités publiques ont signé des contrats de services avec quatre consortiums privés. À travers cette étude de cas, nous nous interrogerons sur deux aspects : pourquoi les autorités publiques établissentelles des partenariats avec le secteur privé ? Quelles sont les implications de ces partenariats sur la gouvernance de l'eau ? Cet article s'intéresse, d'une part, au débat conceptuel sur l'eau en tant que bien public et/ou privé, en identifiant les tendances nouvelles et les stratégies menées par les opérateurs privés. D'autre part y sont analysés le rôle de l'État et ses relations avec d'autres acteurs à travers un modèle de gouvernance, défini en termes de partenariats, et des réseaux multi-niveaux.


Author(s):  
Peter Coss

In the introduction to his great work of 2005, Framing the Early Middle Ages, Chris Wickham urged not only the necessity of carefully framing our studies at the outset but also the importance of closely defining the words and concepts that we employ, the avoidance ‘cultural sollipsism’ wherever possible and the need to pay particular attention to continuities and discontinuities. Chris has, of course, followed these precepts on a vast scale. My aim in this chapter is a modest one. I aim to review the framing of thirteenth-century England in terms of two only of Chris’s themes: the aristocracy and the state—and even then primarily in terms of the relationship between the two. By the thirteenth century I mean a long thirteenth century stretching from the period of the Angevin reforms of the later twelfth century on the one hand to the early to mid-fourteenth on the other; the reasons for taking this span will, I hope, become clearer during the course of the chapter, but few would doubt that it has a validity.


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