102 research outputs found
Enhancement of the Electrocatalytic Properties of Prussian Blue Containing Multilayer Films Formed by Reduced Graphene Oxide
AbstractIn our work we focused on the electroactive and electrocatalytic properties of multilayer films formed from polyelectrolytes (PE) and Prussian blue nanoparticles (PBn), enhanced by addition of reduced graphene oxide (rGO). Films containing poly(allylamine hydrochloride) (PAH) and PBn were constructed using the layer-by-layer adsorption method. Graphene oxide (GO) was deposited from its aqueous suspension forming additional layers of the film. Then they were exposed to the elevated temperature, 180°C to turn graphene oxide into its reduced form. We demonstrated, by cyclic voltamperometry, that the presence of conductive rGO greatly enhanced the electroactive properties of the PE/PB multilayer films. Simultaneously, they were also up to 40 times more effective for the electrocatalytic redox processes of hydrogen peroxide
Application of bioinformatics methods to recognition of network threats, Journal of Telecommunications and Information Technology, 2007, nr 4
Bioinformatics is a large group of methods used in biology, mostly for analysis of gene sequences. The algorithms developed for this task have recently found a new application in network threat detection. This paper is an introduction to this area of research, presenting a survey of bioinformatics methods applied to this task, outlining the individual tasks and methods used to solve them. It is argued that the early conclusion that such methods are ineffective against polymorphic attacks is in fact too pessimistic
Security theory and practice: Germany towards security problems and international cooperation in the 21st century
Z wprowadzenia: "Pierwsze ćwierćwiecze XXI wieku obfituje w dyskusje na temat wagi i znaczenia wyzwań
międzynarodowych. Również niemieccy politycy prezentują strategie i programy
osiągania przez Niemcy celów i interesów na arenie międzynarodowej. Ocena
realizacji niemieckiej polityki bezpieczeństwa oraz poziomu współpracy międzynarodowej
wymaga uwzględnienia wielu czynników o charakterze podmiotowym i przedmiotowym.
Minister obrony Ursula von der Leyen proponowała „przywództwo
z centrum”, a prezydent Joachim Gauck postulował zwiększenie „odpowiedzialności
międzynarodowej” Niemiec. Podczas gdy minister spraw zagranicznych Guido Westerwelle
opowiedział się za trwaniem przy „kulturze wstrzemięźliwości”, socjaldemokraci
Sigmar Gabriel i Frank-Walter Steinmeier optowali za polityką zaangażowania
Niemiec. Kanclerz Angela Merkel odnosząc się do dyskusji dotyczących rozbrojenia
podkreślała, że odstraszanie stanowi istotny element stabilizacji środowiska międzynarodowego
i postulowała realistyczne podejście do problematyki zbrojeń."(...
Usefulness of C-reactive protein as a marker of early post-infarct left ventricular systolic dysfunction
Objective To assess the usefulness of in-hospital measurement
of C-reactive protein (CRP) concentration in
comparison to well-established risk factors as a marker of
post-infarct left ventricular systolic dysfunction (LVSD) at
discharge.
Materials and methods Two hundred and four consecutive
patients with ST-segment-elevation myocardial
infarction (STEMI) were prospectively enrolled into the
study. CRP plasma concentrations were measured before
reperfusion, 24 h after admission and at discharge with an
ultra-sensitive latex immunoassay.
Results CRP concentration increased significantly during
the first 24 h of hospitalization (2.4 ± 1.9 vs. 15.7 ± 17.0
mg/L; p\0.001) and persisted elevated at discharge
(14.7 ± 14.7 mg/L), mainly in 57 patients with LVSD
(2.4 ± 1.8 vs. 25.0 ± 23.4 mg/L; p\0.001; CRP at discharge
21.9 ± 18.6 mg/L). The prevalence of LVSD was
significantly increased across increasing tertiles of CRP
concentration both at 24 h after admission (13.2 vs. 19.1
vs. 51.5 %; p\0.0001) and at discharge (14.7 vs. 23.5 vs.
45.6 %; p\0.0001). Multivariate analysis demonstrated
CRP concentration at discharge to be an independent
marker of early LVSD (odds ratio of 1.38 for a 10 mg/L
increase, 95 % confidence interval 1.01–1.87; p\0.04).
Conclusion Measurement of CRP plasma concentration
at discharge may be useful as a marker of early LVSD in
patients after a first STEMI
Health-related qualify of life, angina type and coronary artery disease in patients with stable chest pain.
Health-related quality of life (HRQoL) is impaired in patients with stable angina but patients often present with other forms of chest pain. The aim of this study was to compare the pre-diagnostic HRQoL in patients with suspected coronary artery disease (CAD) according to angina type, gender, and presence of obstructive CAD. From the pilot study for the European DISCHARGE trial, we analysed data from 24 sites including 1263 patients (45.9% women, 61.1 ± 11.3 years) who were clinically referred for invasive coronary angiography (ICA; 617 patients) or coronary computed tomography angiography (CTA; 646 patients). Prior to the procedures, patients completed HRQoL questionnaires: the Short Form (SF)-12v2, the EuroQoL (EQ-5D-3 L) and the Hospital Anxiety and Depression Scale. Fifty-five percent of ICA and 35% of CTA patients had typical angina, 23 and 33% had atypical angina, 18 and 28% had non-anginal chest discomfort and 5 and 5% had other chest discomfort, respectively. Patients with typical angina had the poorest physical functioning compared to the other angina groups (SF-12 physical component score; 41.2 ± 8.8, 43.3 ± 9.1, 46.2 ± 9.0, 46.4 ± 11.4, respectively, all age and gender-adjusted p < 0.01), and highest anxiety levels (8.3 ± 4.1, 7.5 ± 4.1, 6.5 ± 4.0, 4.7 ± 4.5, respectively, all adjusted p < 0.01). On all other measures, patients with typical or atypical angina had lower HRQoL compared to the two other groups (all adjusted p < 0.05). HRQoL did not differ between patients with and without obstructive CAD while women had worse HRQoL compared with men, irrespective of age and angina type. Prior to a diagnostic procedure for stable chest pain, HRQoL is associated with chest pain characteristics, but not with obstructive CAD, and is significantly lower in women. Clinicaltrials.gov, NCT02400229
Oxidation properties of the Crofer 22 APU steel coated with La0.6Sr0.4Co0.2Fe0.8O3 for IT-SOFC interconnect applications
International Academic Conference Central and Eastern Europe in the International Politics of the Twentieth and Twenty-First Centuries 7–8 November 2022, Kraków
Słowo wstępne: "Oddajemy w Państwa ręce księgę abstraktów międzynarodowej konferencji
naukowej „Europa Środkowo-Wschodnia w polityce międzynarodowej
XX i XXI wieku”, która w dniach 7–8 listopada 2022 r. gromadzi
w murach Krakowskiej Akademii im. Andrzeja Frycza Modrzewskiego
doświadczonych badawczy, doktorantów i studentów z Polski i zagranicy.
Konferencja została zorganizowana przez Katedrę Stosunków Międzynarodowych
Krakowskiej Akademii im. Andrzeja Frycza Modrzewskiego
we współpracy z Instytutem Historii i Archiwistyki Uniwersytetu
Pedagogicznego im. KEN w Krakowie (współorganizator). Partnerami
naukowymi są Instytut Historyczny Uniwersytetu Szczecińskiego (organizator
pierwszej części konferencji, przeprowadzonej w dniu 26 maja
2022 r.), Katedra Badań nad Obszarem Eurazjatyckim Uniwersytetu Jagiellońskiego
w Krakowie oraz Instytut Zachodni im. Zygmunta Wojciechowskiego.
Celem konferencji jest wniesienie wkładu w dyskusję naukową o historycznych
doświadczeniach państw Europy Środkowo-Wschodniej oraz
współczesnych wyzwaniach i zagrożeniach, z którymi są konfrontowane
rządy i społeczeństwa państw tego regionu."(...)Patronat honorowy
Prof. KAAFM dr Klemens Budzowski – Rektor Krakowskiej Akademii im. Andrzeja Frycza Modrzewskiego
Oddział Krakowski Polskiego Towarzystwa Studiów Europejskic
Health-related qualify of life, angina type and coronary artery disease in patients with stable chest pain
Background Health-related quality of life (HRQoL) is impaired in patients with stable angina but patients often present with other forms of chest pain. The aim of this study was to compare the pre-diagnostic HRQoL in patients with suspected coronary artery disease (CAD) according to angina type, gender, and presence of obstructive CAD. Methods From the pilot study for the European DISCHARGE trial, we analysed data from 24 sites including 1263 patients (45.9% women, 61.1 +/- 11.3 years) who were clinically referred for invasive coronary angiography (ICA; 617 patients) or coronary computed tomography angiography (CTA; 646 patients). Prior to the procedures, patients completed HRQoL questionnaires: the Short Form (SF)-12v2, the EuroQoL (EQ-5D-3 L) and the Hospital Anxiety and Depression Scale. Results Fifty-five percent of ICA and 35% of CTA patients had typical angina, 23 and 33% had atypical angina, 18 and 28% had non-anginal chest discomfort and 5 and 5% had other chest discomfort, respectively. Patients with typical angina had the poorest physical functioning compared to the other angina groups (SF-12 physical component score; 41.2 +/- 8.8, 43.3 +/- 9.1, 46.2 +/- 9.0, 46.4 +/- 11.4, respectively, all age and gender-adjusted p < 0.01), and highest anxiety levels (8.3 +/- 4.1, 7.5 +/- 4.1, 6.5 +/- 4.0, 4.7 +/- 4.5, respectively, all adjusted p < 0.01). On all other measures, patients with typical or atypical angina had lower HRQoL compared to the two other groups (all adjusted p < 0.05). HRQoL did not differ between patients with and without obstructive CAD while women had worse HRQoL compared with men, irrespective of age and angina type. Conclusions Prior to a diagnostic procedure for stable chest pain, HRQoL is associated with chest pain characteristics, but not with obstructive CAD, and is significantly lower in women
Practical Modelling of Threats to ICT Systems Using the STRIDE Model
W niniejszym artykule opisano praktyczne podejście do zagadnienia stanowiącego aktualnie nieodłączną część wytwarzania nowoczesnych zaawansowanych i złożonych systemów informatycznych - do modelowania zagrożeń teleinformatycznych. W artykule przedstawiono praktyczną zasadność i przebieg procesu modelowania zagrożeń, a następnie opisano jedną z najpopularniejszych metod identyfikacji i analizy zagrożeń - tak zwany model STRIDE.This article describes a practical approach to the issue which is currently an integral part of the development of modern advanced and complex information systems - ICT threat modelling. The article presents the practical validity and process of threat modelling and then describes one of the most popular methods of threat identification and analysis - the so-called STRIDE model
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