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Number of results: 5
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Abstract

The aim of this study was to assess soil contamination with toxic metals in the area of Piekary Śląskie (Silesian Voivodeship), taking into consideration various land use patterns. The scope of research covered the determination of lead and cadmium concentration in soil in the following areas: allotment gardens, fallow lands and kindergarten playgrounds. The lead and cadmium concentrations in soil samples were determined using a flame atomic absorption spectrometry technique, after the aqua regia extraction in a MDS 2000 microwave digestion system. The metal contents in the analyzed soil samples varied remarkably, depending on the sampling location and its distance from the main emitter of toxic metals in Piekary Śląskie, i.e. "Orzel Bialy" Non-Ferrous Metal Smelter. Metal concentrations determined in all soil samples significantly exceeded the concentration levels accepted in Poland for arable lands and residential areas. The lead and cadmium concentrations in soil should become the basis for stopping edible plants cultivation in the area of Piekary Śląskie. The contaminated soil in kindergarten playgrounds can be an important source of lead and cadmium contamination, posing hazard to the children's health. Contamination of playgrounds with toxic metals should stimulate undertaking actions aimed at modernization of playgrounds and reduction of the children's contact with soil. In the context of the applied result assessment criteria the soil concentrations of these metals observed in the region of Piekary Śląskie should arouse great concern among its users and local authorities.
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Authors and Affiliations

Elżbieta Kulka
Jadwiga Gzyl
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Abstract

The paper presents a construction of magnetic observatory "Arctowski" on King George Island. The parameters of magnetic instruments and mean values of D, H, Z and F(T) of magnetic field are presented. Examples of registration of changes of the magnetic field are noted.

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Authors and Affiliations

Antoni Szymański
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Abstract

The paper presents basic information on EU regulations regarding maritime safety and the prevention of sea pollution by vessels. The importance of this problem is reflected in the establishment of the European Maritime Safety Agency (EMSA). The author describes the basic aims of this new organization and draws attention to some of the consequences its creation will have for Poland following the country's accession to the European Union.
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Authors and Affiliations

Mirosław H. Koziński
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Abstract

Soil contamination with petroleum hydrocarbons is a serious problem. In the soil in the location of highways, fuel pumping station and airfields high pollutant concentrations are found. The contents of total hydrocarbons (THC) and 16 polycyclic aromatic hydrocarbons (PAHs) were analysed in the surface (0-20 cm) soil samples from airfields in Dęblin Marked differences in the pollution level of the above areas were noted. The PAH contents ranged from 113 to 5638 μg/kg and THC contents range from 40 to 430 mg/kg. The analysis was carried out by reverse phase HPLC (PAHs) and SOXTEC apparatus according to Polish norm PN-86/C-04573/01.
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Authors and Affiliations

Stanisław Baran
Patryk Oleszczuk
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Abstract

Under the pressure of sanitary restrictions, the potential of information technologies available to the academic communities for over a dozen years, but not used for various reasons, is released. As a specific case of this trend, a migration from brick-and-mortar voting towards the remote voting by electronic means may intensify in the post-pandemic period at universities. This phenomenon requires an in-depth analysis, the aim of which is to facilitate the management of academic units to choose optimal solutions in the coming years, when such decisions can be made without time pressure and invasive sanitary restrictions. In the process of electronic remote voting, security is a key requirement, which has a number of various attributes: authenticity, correctness, anonymity, verifiability, receiptfreeness, availability. In response to these, to some extent contradictory, requirements, the world of science has been developing protocols and systems based on cryptographic formalisms for years. This article explains the main challenges related to security of remote electronic voting, from which even advanced solutions implemented in academic practice are not free.
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Authors and Affiliations

Adam Wójtowicz
1

  1. Katedra Technologii Informacyjnych, Uniwersytet Ekonomiczny w Poznaniu

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