Mercury content in the superficial geological formations of Hungary

Abstract Among the periodic system's elements, mercury (Hg) is most liable to dispersion and, simultaneously, most liable to secondary enrichment. Consequently, mercury enrichments can occur as a result of a number of geologic as well as anthropogenic processes. If the geologic processes cease, quite extended dispersion halos can form around a former accumulation center. Hydrothermal mineralization is a typical process giving rise to mercury concentration. As a result, regional mercury impacts can occur in the floodplains of rivers flowing from the mining and heavy industrial regions of Transylvania and Slovakia. Elsewhere, mercury anomalies detectable at the intermediate scale (1:50,000) can be found in the Zemplén and Mátra Mountains and, subordinately, in the Börzsöny Mountains. Typically mercury anomalies develop above major structural lineaments as well, unless they are buried under thick young sediments. A remarkable example is the deep fault separating the Pilis and Visegrád Mountains. Another group of Hg anomalies is caused by well-known mercury contamination sources (Kazincbarcika, Balatonfűzfő), which are truly local: they cannot be detected at the scale of the given study

Polytopic Model Based Interaction Control for Soft Tissue Manipulation

Reliable force control is one of the key components of modern robotic teleoperation. The performance of these systems in terms of safety and stability largely depends on the controller design, as it is desired to account for various disturbing conditions, such as uncertainties of the model parameters or latency-induced problems. This work presents a polytopic qLPV model derived from a previously verified nonlinear soft tissue model, along with a model-based force control scheme that involves a tensor product polytopic state feedback controller. The derivation is based on the Tensor Product (TP) Model Transformation. The proposed force control scheme is verified and evaluated through numerical simulations. Index Terms—Soft tissue modeling, telesurgery control, Polytopic model based control, TP Model Transformation, qLPV modeling, LMI-based controller design

Nonlinear Soft Tissue Mechanics Based on Polytopic Tensor Product Modeling

Achieving reliable force control is one of the main design goals of robotic teleoperation. It is essential to grant safe and stable performance of these systems, regarding HMI control, even under major disturbing conditions such as time delay or model parameter uncertainties. This paper discusses the systematic derivation of polytopic qLPV model from the nonlinear dynamics of typical soft tissues of the human body based on recent experimental results. The derivation is based on the Tensor Product (TP) Model Transformation. The presented method is a crucial step in laying the foundations of adequate force control in telesurgery. The proposed approach could form the basis of LMI-based controller design

Weiss Manfréd – egy magyar vállalkozó eredményei

Több Magyarországon alkotó nagy műszaki alkotót méltatlanul felejtünk el, vagy nem kellőképpen emlékezünk meg róluk. Ezen műszaki nagyjaink közé tartozik Weiss Manfréd is. Kutatásunkban az Ő életét, a technikai fejlődésért tett munkáságát mutatjuk be. Munkánkban a híres feltaláló-mérnök életén túl a műszaki eredményeit és azok az utókorra kiható hatásait is feltárom. Értekezésünkben kitérünk a kor szellemiségére, annak érdekében, hogy jobban meg lehessen érteni a feltaláló munkáságát, alkotói környezetét. Szeretném kiemelni, hogy az elvégezett feltáró munkánk során felfedeztük, milyen fontos a témaválasztás. Az utókornak kötelessége, hogy feltárja és megismerje elődjei munkáságát, ebből okuljon és minél szélesebb körben terjessze ezt, nyilvánosságra hozza

Tódor Kármán – Work of a Hungarian Inventor

Sadly, many great Hungarian engineers have been forgotten, engineers who could be outstanding role models for the young engineers of today. In some aspects Tódor Kármán belongs to these forgotten engineers. For that reason, we examine his life and work in our research. I distinctly refer to the educational system of the era, since his scientific work also originated from this. This essay also explores the most important work and inventions of the great scientist with regard to his space research activities that were way ahead of his time. In this context, I also mention Dr. Antal Bejczy, one of his followers in space research

Wireless Multi-Sensor Networks for Smart Cities: A Prototype System with Statistical Data Analysis

As urbanization proceeds at an astonishing rate, cities have to continuously improve their solutions that affect the safety, health and overall wellbeing of their residents. Smart city projects worldwide build on advanced sensor, information and communication technologies to help dealing with issues like air pollution, waste management, traffic optimization, and energy efficiency. The paper reports about the prototype of a smart city initiative in Budapest which applies various sensors installed on the public lighting system and a cloud-based analytical module. While the installed wireless multi-sensor network gathers information about a number of stressors, the module integrates and statistically processes the data. The module can handle inconsistent, missing and noisy data and can extrapolate the measurements in time and space, namely, it can create short-term forecasts and smoothed maps, both accompanied by reliability estimates. The resulting database uses geometric representations and can serve as an information centre for public services.Comment: 9 pages, 8 figures, 3 tables, 27 reference