Secure communication between data logger and database server

Táto práca je zameraná na analýzu bezpečnostných rizík pri prenose dát v sieti Internet a navrhnutie niekoľkých možných riešení zabezpečenia komunikácie medzi jednotkou zberu dát a serverom pre spracovanie dát. Výsledkom je navrhnuté riešenie zabezpečenia tejto dátovej komunikácie pomocou SSL vrstvy.This work is aimed to analyze security risks of data transfer in Internet network and to design couple of possible solutions for securing communication between data logger and server for data processing. As a result, solution of securing this data communication by SSL layer was designed.

Numerical simulations of stratocumulus cloud response to aerosol perturbation

In this paper results from the 2D numerical model with Lagrangian representation of microphysics are used to investigate the response of the radiative properties of stratocumulus as a result of adding aerosol within the boundary layer. Three different cases characterized by low, moderate and high cloud droplet number and for 3 sizes of additional aerosol 0.01. μm, 0.1. μm and 0.5. μm are discussed. The model setup is an idealization of one of the proposed Solar Radiation Management methods to mitigate global warming by increasing albedo of stratocumulus clouds. Analysis of the model results shows that: the albedo may increase directly in response to additional aerosol in the boundary layer; the magnitude of the increase depends on the microphysical properties of the existing cloud and is larger for cloud characterized by low cloud droplet number; for some cases for clouds characterized by high cloud droplet number seeding may lead to the decrease in albedo when too large radius of seeding aerosol is used

Aerosols in the Pre-industrial Atmosphere

Purpose of Review: We assess the current understanding of the state and behaviour of aerosols under pre-industrial conditions and the importance for climate. Recent Findings: Studies show that the magnitude of anthropogenic aerosol radiative forcing over the industrial period calculated by climate models is strongly affected by the abundance and properties of aerosols in the pre-industrial atmosphere. The low concentration of aerosol particles under relatively pristine conditions means that global mean cloud albedo may have been twice as sensitive to changes in natural aerosol emissions under pre-industrial conditions compared to present-day conditions. Consequently, the discovery of new aerosol formation processes and revisions to aerosol emissions have large effects on simulated historical aerosol radiative forcing. Summary: We review what is known about the microphysical, chemical, and radiative properties of aerosols in the pre-industrial atmosphere and the processes that control them. Aerosol properties were controlled by a combination of natural emissions, modification of the natural emissions by human activities such as land-use change, and anthropogenic emissions from biofuel combustion and early industrial processes. Although aerosol concentrations were lower in the pre-industrial atmosphere than today, model simulations show that relatively high aerosol concentrations could have been maintained over continental regions due to biogenically controlled new particle formation and wildfires. Despite the importance of pre-industrial aerosols for historical climate change, the relevant processes and emissions are given relatively little consideration in climate models, and there have been very few attempts to evaluate them. Consequently, we have very low confidence in the ability of models to simulate the aerosol conditions that form the baseline for historical climate simulations. Nevertheless, it is clear that the 1850s should be regarded as an early industrial reference period, and the aerosol forcing calculated from this period is smaller than the forcing since 1750. Improvements in historical reconstructions of natural and early anthropogenic emissions, exploitation of new Earth system models, and a deeper understanding and evaluation of the controlling processes are key aspects to reducing uncertainties in future

Effects of Aerosols on the Radiative Properties of Clouds

The influence of anthropogenic aerosols, in the form of ship exhaust effluent, on the microphysics and radiative properties of marine stratocumulus is studied using data gathered from the U.K. Met. Office C-130 and the University of Washington C-131A aircraft during the Monterey Area Ship Track (MAST) experiment in 1994. During the period of MAST, stratocumulus clouds were studied during 11 flights and a wide range of levels of background pollution was observed. The impact of the aerosol emitted from the ships was found to be very dependent on the background cloud microphysical conditions. In clouds of continental influence, the susceptibility of the cloud to further aerosol emissions was low, with a correspondingly weak microphysics and radiation signature in the ship tracks. In clean clouds, changes in droplet concentration of a factor of 2, and reductions in droplet size of up to 50%, were measured. These changes in the microphysics had significant impacts on the cloud radiative forcing. Furthermore, as a result of the cloud droplet size being reduced, in some cases the drizzle was suppressed in the clean clouds, resulting in an increase in liquid water path in the polluted ship track environment. The impact of this combined change in liquid water path and droplet radius was to increase the cloud radiative forcing by up to a factor of 4

Cardiomyopathies in children – Current opinions and our experiences Croatian retrospective epidemiological study 1988-2016

Uvod: Na kardiomiopatije (KM) otpada 3 – 5% svih bolesnika za koje se skrbe pedijatrijski kardiolozi. Nalaze se u svim dobnim skupinama, od fetalne do adolescentne dobi, a u timskom radu obuhvaćaju uz kardiologiju više pedijatrijskih supspecijalnosti (neurologija, metabolizam, genetika). Zbog novih spoznaja i mogućnosti liječenja stupanj preživljenja sve je viši. Cilj: Primarni je cilj prikazati KM-e opsežnom retrospektivnom epidemiološkom studijom prema suvremenoj klasifikaciji, primjenom najnovijih dijagnostičkih metoda i terapijskih pristupa te prožimanjem s ostalim supspecijalnostima. Sekundarni je cilj pokazati da kardiomiopatije više nisu „rijetke, nevažne i neizlječive“, nego su česte, važne i lječive. Rezultati studije: U razdoblju od siječnja 1988. do prosinca 2016. (28 godina) u Referentnom centru za pedijatrijsku kardiologiju Klinike za pedijatriju KBC-a Zagreb hospitalizirano je 315 bolesnika s dijagnozom kardiomiopatije, 183 muškog (58,1%) i 132 ženskog (41,9%) spola. U tri različita razdoblja (10 godina, 12 godina, 6 godina) služili smo se klasifikacijom KM-a iz 1996. godine. Sva tri razdoblja imaju obilježja populacijske, a posljednja dva imaju obilježja i kliničke epidemiološke studije. U sva tri razdoblja najčešća je dilatacijska kardiomiopatija (DKM) (42,5%), a slijede hipertrofična (HKM) (37,1%) i restrikcijska (RKM) (6,7%). Njihovi su relativni odnosi u stalnoj ravnoteži. Uočava se znatan porast entitetskih oblika: aritmogena desnoventrikularna kardiomiopatija (ADVKM) i nekompaktna kardiomiopatija (NKKM), i to od 5,8% (1988. – 1998.) na 16,2% (2010. – 2016.). Smanjen je broj KM-a nepoznata uzroka: kod DKM-a 24,4%, a kod HKM-a tek 18,8%. U posljednjih 18 godina zabilježili smo smrtnost od 7,4% (14/194), od čega 50% (7/14) otpada na DKM. Rezultat je to timskog rada, ciljane medikamentne terapije, elektroterapije (elektrostimulator – ES, srčana resinkronizacija – CRS, implantabilni kardioverterski defibrilator – ICD) i kardiokirurške terapije (operacija prema Morrowu, zaomčavanje (engl. banding) plućne arterije – PAB), uključujući i presadbu srca od 2011. godine (8 bolesnika). Zaključak: Kardiomiopatije su nakon prirođenih srčanih grješaka najteže bolesti u skrbi pedijatrijskog kardiologa, nalažu skladan timski rad više skupina stručnjaka te svladavanje brojnih dijagnostičkih i terapijskih metoda. Dilatacijske kardiomiopatije najčešći su uzrok smrti i najčešća indikacija za presadbu srca u djece.Introduction: Cardiomyopathies (CM) account for 3-5% of patients in the care of pediatric cardiologists. They are found in all age groups, from fetal to adolescent age, and along with cardiology, teams from several other pediatric subspecialties (neurology, metabolism, genetics) are also included. New findings have led to a high survival rate. Goal: The primary goal is to present CM as an important part in the work of pediatric cardiologist through an elaborate epidemiological study, current classifications, the latest diagnostic methods and treatments, as well as the intertwining with other subspecialties. The secondary goal is to show that CM are no longer “uncommon, insignificant and terminal”, but are common, significant and treatable diseases. Results: From January 1988 to December 2016 (28 years) in the Referral Center for Pediatric Cardiology, Department of Pediatrics, Clinical Hospital Centre, 315 patients were diagnosed with cardiomyopathy,183 males (58.1%) and 132 females (41.9%). In three different periods (10 , 12 and six years) a classification from 1996 was used (10). All three periods have features of a population study, whereas the latter two also have features of an epidemiological study. In all three periods there was a predominance of dilated cardiomyopathies (DCM) (42.5%) , followed by hypertrophic cardiomyopathies (HCM) (37.1%) and restrictive cardiomyopathies (RCM) (6.7%) . Their relative relations were in constant balance. A significant increase of some entity forms, arrhythmogenic right ventricular cardiomyopathies (ARVCM) and non-compaction cardimyopathies (NCCM) has been observed, from 5.8% (1988-1998) to 16.2% (2010-2016). Owing to advances in diagnostic methods, number of unclassified CM has been decreasing significantly. The cause remained unknown in only 24.4% of DCM patients, and in 18.8% of HCM patients. In the last 18 years the mortality rate of 7.4% (14/194) has been recorded, 50% (7/14) due to DCM. That is the result of teamwork, targeted medical therapy, electrotherapy (electrical stimulation - ES, cardiac resynchronisation - CRS, implantable cardioverter defibrilator - ICD) and surgical therapy (Morrow, pulmonary artery banding - PAB), including heart transplantaton since 2011 (8 patients). Conclusion: Cardiomyopathies are after congenital heart defects the most severe diseases under care of pediatric cardiologists. They require fluent teamwork of several expert groups, and mastering of numerous diagnostic and therapeutic methods. Dilated cardiomyopathies are the most common cause of death and the indication for heart transplatation in children

Kardiomiopatije u djece - Današnja stajališta i naša iskustva Hrvatska retrospektivna epidemiološka studija 1988. - 2016. [Cardiomyopathies in children - Current opinions and our experiences Croatian retrospective epidemiological study 1988-2016]

INTRODUCTION: Cardiomyopathies (CM) account for 3-5% of patients in the care of pediatric cardiologists. They are found in all age groups, from fetal to adolescent age, and along with cardiology, teams from several other pediatric subspecialties (neurology, metabolism, genetics) are also included. New findings have led to a high survival rate. ----- GOAL: The primary goal is to present CM as an important part in the work of pediatric cardiologist through an elaborate epidemiological study, current classifications, the latest diagnostic methods and treatments, as well as the intertwining with other subspecialties. The secondary goal is to show that CM are no longer “uncommon, insignificant and terminal”, but are common, significant and treatable diseases. ----- RESULTS: From January 1988 to December 2016 (28 years) in the Referral Center for Pediatric Cardiology, Department of Pediatrics, Clinical Hospital Centre, 315 patients were diagnosed with cardiomyopathy,183 males (58.1%) and 132 females (41.9%). In three different periods (10 , 12 and six years) a classification from 1996 was used (10). All three periods have features of a population study, whereas the latter two also have features of an epidemiological study. In all three periods there was a predominance of dilated cardiomyopathies (DCM) (42.5%) , followed by hypertrophic cardiomyopathies (HCM) (37.1%) and restrictive cardiomyopathies (RCM) (6.7%) . Their relative relations were in constant balance. A significant increase of some entity forms, arrhythmogenic right ventricular cardiomyopathies (ARVCM) and non-compaction cardimyopathies (NCCM) has been observed, from 5.8% (1988-1998) to 16.2% (2010-2016). Owing to advances in diagnostic methods, number of unclassified CM has been decreasing significantly. The cause remained unknown in only 24.4% of DCM patients, and in 18.8% of HCM patients. In the last 18 years the mortality rate of 7.4% (14/194) has been recorded, 50% (7/14) due to DCM. That is the result of teamwork, targeted medical therapy, electrotherapy (electrical stimulation - ES, cardiac resynchronisation - CRS, implantable cardioverter defibrilator - ICD) and surgical therapy (Morrow, pulmonary artery banding - PAB), including heart transplantaton since 2011 (8 patients). Conclusion: Cardiomyopathies are after congenital heart defects the most severe diseases under care of pediatric cardiologists. They require fluent teamwork of several expert groups, and mastering of numerous diagnostic and therapeutic methods. Dilated cardiomyopathies are the most common cause of death and the indication for heart transplatation in children