Strangeness Production at COSY

The paper gives an overview of strangeness-production experiments at the Cooler Synchrotron COSY. Results on kaon-pair and phi meson production in pp, pd and dd collisions, hyperon-production experiments and Lambda p final-state interaction studies are presented.Comment: Proceedings of the 12th Int. Conf. on Meson-Nucleon Physics and the Structure of the Nucleon (MENU2010) in Williamsburg (USA

Redefining cybersecurity through processual ontology of the cyberspace

The way cyberspace is conceptualized in security discourses shapes strategies, tools and possible solutions developed within the ICT security debate. Putting forward processual ontology of cyberspace helps in apprehending the unique dynamics of this new domain arising from the intersection of ICT with social and political phenomena. Cyberspace is presented as a process of data transmission and information cognition/processing in the digital domain. It contains time as an inherent dimension and includes all subjects and objects of this process: data (codes, packets, files, texts), information (structured or operationalized data), human and computer agents (people, software) and communication environment (hardware, protocols). Processual ontology is based on the fact that ICT is a man-made realm with almost unlimited potential to expand, where physical distance is lapsed and bits are the primary matter. This theoretical stance blurs the line between human and non-human agents, dehumanizing the idea of actorness by categorizing both humans and computers as actors. Finally, processual ontology of cyberspace promotes resilience strategies both in the private sector as well as on national and international level

The small world phenomenon and assortative mixing in Polish corporate board and director networks

AbstractThis paper investigates the corporate board and director networks in the Polish capital market in 2014. We examined real board and director networks in comparison with networks that were randomly constructed. Through empirical analyses, we demonstrated that the real networks have the characteristics of small-world networks. In addition, the networks are assortative and highly clustered, which imposes certain behaviors on them

Zawał serca z uniesieniem odcinka ST spowodowany późną zakrzepicą w stencie metalowym, leczony dowieńcowym podaniem abciksimabu oraz aspiracyjną trombektomią

Przedstawiono przypadek 56-letniego pacjenta z zawałem serca z uniesieniem odcinka ST spowodowanego późną zakrzepicą w stencie metalowym po odstawieniu leczenia przeciwpłykowego kwasem acetylosalicylowym. Przy przyjęciu do pracowni hemodynamiki w zapisie elektrokardiograficznym obserwowano uniesienia odcinka ST o charakterze falii Pardeego w odprowadzeniach II, III, aVF oraz patologiczne załamki Q w III i aVF. Trzy lata wcześniej pacjent miał wykonaną przezskórną interwencję wieńcową w zakresie prawej tętnicy wieńcowej połączoną z implantacją stentu metalowego z powodu świeżego zawału serca. Zabieg wykonano optymalnie, przebiegł bez powikłań. Dwanaście miesięcy po przezskórnej interwencji wieńcowej chory przestał zażywać leki, w tym kwas acetylosalicylowy, ponieważ czuł się dobrze. Przez następne 2 lata nie zażywał żadnych leków i nie był u kontroli u lekarza. W obecnym badaniu koronarograficznym stwierdzono zamknięcie prawej tętnicy wieńcowej z obecnością dużej skrzepliny. Zastosowano trombektomię aspiracyjną systemem 6 F. W koszyczku uwidoczniono dużą ilość odessanego materiału zakrzepowego i zatorowego. Następnie podano dowieńcowo bolus abciksimabu i uzyskano znaczącą redukcję skrzepliny. Ostatecznie wykonano przezskórną interwencję wieńcową z implantacją stentu pokrytego lekiem. Pacjenta wypisano do domu po 5 dniach z zaleceniem zażywania kwasu acetylosalicylowego w dawce 75 mg do końca życia oraz klopidogrelu w dawce 75 mg przez minimum 12 miesięcy. Planowa angioplastyka wieńcowa w zakresie krytycznie zwężonej gałęzi okalającej została zaplanowana 3–4 tygodnie później.A case of a 56-year-old male with a diagnosis of ST-segment elevation myocardial infarction caused by in-stent thrombosis in a previously impanted bare metal stent after discontinuation of aspirin is presented. On admission there were ST segment elevations in leads II, III, aVF with Q wave in III and aVF in the electrocardiogram. Three years before the admission patient had suffered from inferior wall myocardial infarction and was treated successfully with primary percutaneous coronary intervention (PPCI) of the right coronary artery with bare metal stent (BMS) implantation. Twelve months after the index PPCI patient stopped receiving all medications including ASA. He felt he was in good health condition and did not need to take medications any longer. For the next 2 years he had never visited doctor for follow-up visit. In current angiography occlusion of the right coronary artery with thrombus was identified. Patient was treated with aspiration thrombectomy which revealed large thrombus burden and with intralesion administration of bolus of abciximab via thrombectomy catheter. Afterwards PCI with drug eluting stent implantation was performed. Patient was discharged home after 5 days. At discharge his antiplatelet therapy consisted of acetylsalicylic acid (75 mg once daily) for life, and clopidogrel (75 mg once daily, for at least 12 months)

Small-Scale Energy Use of Agricultural Biogas Plant Wastes by Gasification

In Poland, there are 78 biogas plants producing a total electrical power of 85.94 MW. The byproduct of biogas plants is called a digestate. A single biogas plant with a power of 500 kW produces more than 10,000 ton of digestate per year. The goal of this chapter is to present a low-cost method of raw digestate processing with water content of about 94.55%, and also the results of thermal gasification of dried and pelletized digestate. Initial dehydration method is based on mechanical separation of the solid fraction in screw separator with a slot filter. Pre-dewatered digestate had been dried in biodrying process in semi-technical scale bioreactor. Afterward, the digestate was dried in tubular dryer and pelletized. The chapter covers the energy consumption for each stage of preparation of digestate for thermal gasification process. The gasification tests were conducted in fixed bed downdraft reactor. The chapter also features the physicochemical properties of digestate used in gasification process. The result of research on the gasification of drier digestate was gaseous fuel that does not differ from the quality of fuels obtained from the thermal treatment of other types of biomass

Study of the Λp\Lambda p Interaction Close to the Σ+n\Sigma^+n and Σ0p\Sigma^0p Thresholds

The $\Lambda p$ interaction close to the $\Sigma N$ threshold is considered. Specifically, the pronounced structure seen in production reactions like $K^-d \to \pi^- \Lambda p$ and $pp\to K^+ \Lambda p$ around the $\Sigma N$ threshold is analyzed. Modern interaction models of the coupled $\Lambda N - \Sigma N$ systems generate such a structure either due to the presence of a (deuteron-like) unstable bound state or of an inelastic virtual state. % A determination of the position of the prominent peak as observed in various experiments for the two aforementioned reactions leads to values that agree quite well with each other. Furthermore, the deduced mean value of $2128.7\pm 0.3$ MeV for the peak position coincides practically with the threshold energy of the $\Sigma^+ n$ channel. This supports the interpretation of the structure as a genuine cusp, signaling an inelastic virtual state in the $^3S_1-^3D_1$ partial wave of the $\Sigma N$ isospin 1/2 channel. % There is also evidence for a second peak (or shoulder) in the data sets considered which appears at roughly 10-15 MeV above the $\Sigma N$ threshold. However, its concrete position varies significantly from data set to data set and, thus, a theoretical interpretation is difficult.Comment: accepted for publication Nucl. Phys.

Event Reconstruction for a DIRC

Monte Carlo simulations were made for a possible DIRC at the WASA detector at COSY. A statistical method for pattern recognition is presented and the possible angle resolution and velocity precision achieved are discussed.Comment: Minor changes in text. Figures updated. accepted by JINS

Dmytro Doncow : publicysta nieznany

The author of the article presents a profile of Dmytro Doncow, a little-known columnist. The text proves a hypothesis that the writer was a conservatist with an inclination for monarchism. Being an occidentalist, he was in favour of traditional European values, derived from Christian faith and ethics, and claimed that the cultural and political future of Ukraine were integrally related to the future of a European continent. Considering a Ukrainian columnist a representative of a cycle of fascists and advocates of a national left-wing socialism is a big academic abuse

Sectoral analysis of the US stock market through complex networks

PURPOSE: This study was carried out to analyze the structure of the aggregated network at the level of economic sectors and to reveal the central/peripheral sectors.DESIGN/METHODOLOGY/APPROACH: The study uses the method of complex networks, with the two-step procedure employed to construct the network of economic sectors. First, the MST approach is utilized based on the cross-correlation of 496 stock price returns of the S&P500 Index. Then, the network is aggregated at the level of economic sectors. In addition, to analyze the graph, the network theory, multi-dimensional scaling (MDS), and relative importance approaches are employed.FINDINGS: The results indicate that the sectoral network has a core/periphery structure. Based on the centrality measures, the ranking of sectors is provided. Of the 11 sectors, 3 are classified as central nodes, 4 as peripheral nodes, and the remaining 4 are classified as intermediate. In addition, the network configuration analysis demonstrates that the graph consists of two parts with a star-like structure, connected through the industrials sector.PRACTICAL IMPLICATIONS: An analysis of the cross-correlation network of aggregated assets at the level of economic sectors can be applied to ascertain the direction of stock price movements in the stock market. The division of sectors in the network into central and peripheral nodes has important implications for the management of an optimal portfolio of stocks.ORIGINALITY/VALUE: This study contributes to complex network theory and portfolio strategy design. A unique procedure is proposed to construct the network of economic sectors using the MST-based approach. Detection of the stock market network structure is vital for investors and regulators alike.peer-reviewe