Dennis Gabor College

<bold>Background:</bold> According to data from COVID-19 pandemic, mortality rate was 1-3%. The severity of x-ray and pathology resulted in proportional circulatory impairment. <bold>Aims:</bold> We tried to clarify the cause of heart failure in patients who died of COVID-19 infection in our ICU. We examined the pressure load on the right ventricle as a probable cause of death. <bold>Method</bold> Using flow laws, a double torus-shaped blood circulation model can be developed. <fig><object-id>erj;66/suppl_69/PA1720/F1</object-id><object-id>F1</object-id><object-id>F1</object-id><graphic></graphic></fig> Knowing the pulmonary and systemic circulation times (t_2π), at a given velocity (v) and cross-sectional area (A), the change in <italic>average</italic> blood pressure (P) and blood volume (V) of our patients can be calculated together with their circumferences (C) [1]. <bold>Results:</bold> In connection with the radiological and histological images, we found an average right ventricular pressure of 34 mmHg in our 18 patients by echocardiography. This pressure increase, according to the model, causes a 23% pressure drop in the systemic circulation, which led to shock. <bold>Conclusions:</bold> This fluid mechanics approach may be suitable for demonstrating pathological processes occurring in the circulation of COVID-19 patients. This supports our therapeutic decisions against circulatory collapse. Based on this model, a mortality risk score could be created for this disease. 1. Nagy,T.E. Human blood circulation model based on flow laws of intensity and continuity in relation to earth’s surface gravity. 2023. J Lung Pulm Respir Res.

A fenntartható fagondozás-, és erdőgazdálkodás témája napjainkban kiemelten fontos, hiszen a globális éghajlatváltozás, a természeti erőforrások kimerülése, valamint a zöldfelületek csökkenése egyre sürgetőbbé teszi a felelős gazdálkodási-, és környezetvédelmi megközelítések elterjedését. A publikáció célja, hogy átfogó képet adjon a hosszútávú, fenntartható fagondozás gazdasági-, és környezeti megközelítéséről, különös hangsúlyt fektetve a modern technológiai eszközök – elsősorban a Fakopp 3D akusztikus tomográf – gyakorlati alkalmazására, valamint a lakossági hulladékkezelési attitűdök vizsgálatára. A cikk első részében áttekintjük a fenntartható fagondozás elméleti és jogi alapjait, bemutatjuk a kapcsolódó nemzetközi és hazai szakirodalmat, valamint a releváns szabályozási környezetet. A szakmai fejezetben részletesen ismertetjük a Fakopp 3D technológia működését és előnyeit, illetve saját, kertészeti és faápolási tapasztalatainkon alapuló megfigyeléseket osztunk meg. A kutatásunk empirikus részét egy online kérdőíves felmérés adja, melynek célja a fa kivágása és a kertészeti munkálatok során keletkező hulladék újra- hasznosításával kapcsolatos lakossági attitűdök és gyakorlati szokások feltérképezése volt. A kérdőívre 113 válasz érkezett, melyek alapján részletes statisztikai elemzést készítettünk. Az eredmények rávilágítanak arra, hogy a környezeti tudatosság viszonylag magas, ugyanakkor az információhiány és az infrastrukturális akadályok jelentős gátat jelentenek a fenntartható hulladékkezelés szélesebb körű elterjedésének. A publikáció végén összegeztük a legfontosabb tanulságokat, gazdasági elemzést végzünk, valamint javaslatokat fogalmazunk meg a fenntartható fagondozási és hulladékhasznosítási gyakorlatok továbbfejlesztésére, különös tekintettel a helyi közösségek és önkormányzatok szerepére.

Our study examined the impact of grazing by Hungarian Grey cattle on plant communities in grasslands restored and established through different methods. The grasslands were established and restored in 2009 using five methods: (I) naturally regenerating fallow, (II) hay-mulch addition, (III) seeded grassland following soil preparation, (IV) grazing on abandoned alfalfa fields, and (V) overseeded fallow initiated in 1989. From 2009 to 2011, all sites were uniformly mowed, after which they were grazed using free-ranging Hungarian Grey cattle starting in 2012. This project aims to restore traditional land use and dry grassland grazing in the region. Phytosociological recordings were conducted in 2012, the first year following grazing initiation, and again in 2020, nine years later. We assessed the botanical composition and grassland management value across sites in a 260-hectare experimental area within the Pannonian biogeographic region. The current study seeks to determine how different grassland restoration techniques have influenced the botanical composition and grassland management values of pastures and to identify the most suitable restoration methods. Statistical analyses were conducted using R to assess species count differences across four vegetation categories. The results indicate that the overseeded fallow established in 1989 and the hay-mulch addition method were the most effective techniques. Directly seeded grasslands and abandoned alfalfa fields differed most significantly from these areas. Across all types, species richness and total cover increased relative to the initial conditions in 2012, and the naturalness of the species composition also improved. Returning to traditional land use improved the ecological state of all sites. Restoration of the grazed areas proved optimal over the elapsed period, with two years of mowing followed by grazing. Grazing with Hungarian Grey cattle, a low-impact rustic breed, yielded successful grassland restoration outcomes. Among the restoration methods, direct seeding and the use of alfalfa fields proved uneconomical and ineffective in promoting the desired species composition. Natural regeneration and, particularly, the hay-mulch addition method, were the most effective for conservation and grassland management.

Living cells have spontaneous ultraweak photon emission derived from metabolic reactions associated with physiological conditions. The ORCA-Quest CMOS camera (Hamamatsu Photonics, Japan) is a highly sensitive and essential tool for photon detection; its use with a microscope incubator (Olympus) enables the detection of photons emitted by embryos with the exclusion of harmful visible light. With the application of the second law of thermodynamics, the low-entropy energy absorbed and used by embryos can be distinguished from the higher-entropy energy released and detectable in their environment. To evaluate higher-entropy energy data from embryos, we developed a unique algorithm for the calculation of the entropy-weighted spectral fractal dimension, which demonstrates the self-similar structure of the energy (photons) released by embryos. Analyses based on this structure enabled the distinction of living and degenerated mouse embryos, and of frozen and fresh embryos and the background. This novel detection of ultra-weak photon emission from mouse embryos can provide the basis for the development of a photon emission embryo control system. The ultraweak photon emission fingerprints of embryos may be used for the selection of viable specimens in an ideal dark environment.

In our ever more "digitalizing" world the question arises among in IT teachers or parents often: "With what hardware / software tools and how we should integrate the studying of the use of the new technologies into the education?" In connection with this question, the lecturers selected the Raspberry Pi. The initial target group of this IT family consisted of students, but now it widely used among who want to fully understand their own computers and to make use of their specialties. The price and size of these open, mobile platform card-PC-s are a fraction of the PC / laptop, still they can be used as a full-fledged computer, from playful learning to the core of home automation.

The Industry 4.0 initiative targets the digitalization of design and manufacturing processes. The aim of the Delphi 4LED project of the EU is to trigger this transition in the solid-state lighting industry by developing testing and modeling methodologies aimed at multi-domain characterization of LED based products. In this paper we present the concept and describe our approaches in modeling to create the appropriate "digital twins" of LED packages, modules and luminaires to be used in virtual prototypes applied in different system level design tasks.

Aim of this research to analysing the level of the information security awareness of the undergraduate economic information technology students after the information security course. The young generation use smartphones, tablets to keep in contact with friends at home, on public transport, in the school etc. They use different communication forms on the internet like social networks, chat rooms and so on. These applications are protected by password authentication system to keep save the data of the users. We were interested for which systems find the Economic information technology students important in everyday life and what kind of password use for protecting the information. We see almost in every month in the news a service provider was attacked again by hackers and the have put the username and the passwords on the Internet. The success of the attack depends on user error mainly. On the one hand this research is important to see how complicated passwords use the students after the information security course and on the other hand how they will protect the important information at the work. The students filled out an information security awareness questionnaire after the information security course. The students had to say, which communication systems are more important, how long password they are using by the most important systems like e-mail, community sites, and so on, how complicated is the used password, how often change the students these passwords. Are they using same passwords by different systems or one same password? After the analysis could we see how effective was the information security course for the economic information technology students. How could we build the information security awareness by them to help them to keep save the sensitive data?

Teaching object-oriented programming is not easy. Many questions arise, and we have to make decisions, just at the very beginning of teaching programming: 1) How to begin teaching programming: With structured or object-oriented methods? 2) When to introduce the various OO concepts? 3) When and how deep to teach design? 4) Is it good to use prefabricated patterns? 5) In what environment to teach OO basics: Console or event-driven? I gathered viewpoints and guidelines related to these questions. At the end I show our OO design pattern in short. We have been teaching the ‘Object-Oriented Design and Programming’ course in our college for three years already, in which the design plays an important role. We use book [1] during the course.