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Number of results: 81
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Abstract

Strength and permeability properties along with microstructural evolution of hardened slurries composed of fly ash from fluidal bed combustion of brown coal and an addition of OPC/BFSC is assessed in this paper. An increase in the amount of fly ash in slurries influences the development of mechanical strength and a decrease of hydraulic conductivity. SEM, XRD, and porosity analyses confirmed formation of watertight microstructures. The structure of slurries is composed of ettringite, C-S-H phase, AFt, and AFm phases. Ettringite crystallises as relatively short needles forming compact clusters or intermixed with the C-S-H phase. The occurring C-S-H phases are mainly of type I – fibrous and type II – honeycomb
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Abstract

We discuss waste, fuels, and air quality with Prof. Czesława Rosik-Dulewska from the PAS Institute of Environmental Engineering and the Department of Land Protection at the University of Opole.
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Abstract

How do bark-beetle outbreaks begin, how do they spread? What are the key factors that affect their population dynamics? Ongoing research has provided some understanding and knowledge, although many questions still remain to be answered fully.
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Abstract

Conservation of the Old Town Zamość began to realize almost a hundred years ago. Then the eminent preachers of culture in the early period. 20.year inter-made idea of restoring the prestige of the works of Polish culture. The idea of protecting national cultural heritage grew gradually until such time as the first scientific research, development of standards and principles of care and maintenance. Today Zamość was inscribed on the UNESCO World Cultural Heritage. Many things made, much remains to be done.
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Abstract

Wherein lies the essence of the two-year dispute over the management and protection of the commercial forest stands in the Białowieża Primeval Forest?
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Abstract

Professor Krzysztof Spalik, Chairman of the PAS Committee for Environmental and Evolutionary Biology, tells us why the Białowieża Forest should be allowed to renew itself on its own.
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Abstract

Conservation of the Old Town Zamość began to realize almost a hundred years ago. Then the eminent preachers of culture in the early period. 20.year inter-made idea of restoring the prestige of the works of Polish culture. The idea of protecting national cultural heritage grew gradually until such time as the first scientific research, development of standards and principles of care and maintenance. Today Zamość was inscribed on the UNESCO World Cultural Heritage. Many things made, much remains to be done.
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Abstract

The aim of this work was to evaluate the use of the naphthalic anhydride safener on the protection of common bean cultivars BRS-Estilo (carioca) and BRS-Esplendor (black) from negative effects of herbicides. Two experiments were conducted, one for each cultivar in a complete randomized design with five replications, in a 6 × 3 factorial scheme, with six herbicide treatments: bentazon, fluazifop-P + fomesafen, bentazon + imazamox, fomesafen, cloransulam, and control without application, and three naphthalic anhydride treatments: without application, foliar application, and application via seed treatment. Visible injuries at 7, 14 and 21 days after application, photosystem II electron transport rate, and plant dry weight were evaluated. The naphthalic anhydride applied via foliar, and seed treatment reduced significantly the visible injuries in relation to the control when using the herbicides bentazon, fluazifop-P + fomesafen, bentazon + imazamox, and cloransulam. The photosystem II electron transport rate was protected by anhydride applied via foliar and seed treatment when using the herbicides bentazon, fluazifop-P + fomesafen and bentazon + + imazamox. The application of naphthalic anhydride via seed treatment protected the BRS-Estilo and BRS-Esplendor common bean cultivars, with no reductions in the plant dry weight when using the herbicides fluazifop-P + fomesafen, and fomesafen. The use of naphthalic anhydride via seed treatment and foliar application protected BRS-Estilo and BRSEsplendor common bean cultivars, from the negative effects of fluazifop-P + fomesafen and fomesafen herbicides. Thus, this practice has potential to be used in common beans.
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Abstract

Though current conservation policy in Poland refl ects world trends and approaches to action, compliance with all of its assumptions would entail the Polish authorities remodelling both the system and the methods by which natural resources are managed. On the one hand this requires a change of approach to the management of natural resources from the traditional, purely nature-related one, to a more modern inter-disciplinary one that takes in social and economic conditioning. On the other hand, a system need to be put in place to allow these ideas to be introduced in practice. The work described here deals with the participation of different stakeholder groups in nature management, with this regarded as a method of increasing the latter’s effi ciency. The many examples (of good practice) presented by the author well illustrate the wisdom of the approach, which often seems to achieve success where it is attempted.
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Abstract

The article presents the problem of the settlements development in the Ojców National Park (ONP) and its buffer zone, both located in the suburban area of Cracow (Poland). The aim of the research was to recognize the social perception of this phenomenon, as well as the residents opinion about the limitations in spatial management related to the functioning of the Park. Interviews were made among 204 residents, and 40 representatives of local self-governments, cultural institutions, associations, administrators of tourist facilities and entrepreneurs. The local community perceives constraints in the new buildings construction and in enlargement or modernization of the existing ones as the main problem for people living in the ONP or its buffer zone. Driven by their particular interests, residents advocate the further development of the settlements and tourist infrastructure within the Park and the buffer zone, the liberalization of regulations, and even the liquidation of the Park’s buffer zone. They do not understand that the natural and landscape values (highly appreciated by them) can be degraded due to these activities.
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Abstract

The book focuses on the issue of nature protection in urban areas. The subject matter of the research was the formal and legal conditions of protected areas in cities. The analysis regarded Polish and global solutions in the scope of the nature protection categories in urban areas, objectives of creating urban protected areas and instruments for fulfi lling the aims of protection in the spatial aspect. The research on globally applied solutions in the scope of nature protection was based on the analysis of source literature and legal acts on nature conservation in cities situated in various countries. As a result, four major types of urban protected areas were distinguished in 80 different cities. The research enabled formulating major characteristics of urban protected areas. Those were, in particular: the integrated approach to the protection of natural and cultural resources and equal treatment of the natural and social objectives of protection. This was the basis for a critical analysis of domestic solutions in the subject matter. The research on formal and legal conditions for the functioning of protected areas in Polish cities was conducted in the administrative borders of voivodeship capitals. The research included 18 cities in total. The analysis concerned basic documents related to the widely understood management of protected areas, including, in particular: legal acts establishing individual protected areas and protected areas management plans, as well as the studies of conditions and directions for the spatial development of communes and local spatial development plans. The research work regarded spatial forms of nature protection, including: national parks, natural reserves, regional parks, protected landscape areas, Natura 2000 areas, ecological sites, documentation sites and nature-landscape complexes. The research included 229 protected areas in total. For the abovementioned protected areas, the following aspects were analyzed: subject matter and objectives of their protection, premises for creating their functional and spatial infrastructure and methods for their development, as well as the scope of provisions in urban spatial planning documents in the abovementioned respect. The research enabled identifying the key problems in the functioning of protected areas in Polish cities, including: • small stability of regulations on nature protection and consequential lack of continuity in the protection of naturally valuable areas, • noticeable tendency to loosen the regulations in the subjected scope, which leads to marginalizing the issues of nature protection while planning urban development. • no coordination of actions performed by various stakeholders in regard to the protected areas, • failure to adjust nature protection objectives to conditions resulting from the location in urban areas, • lack of efficient tools to fulfi ll the nature protection objectives in the spatial aspect. Based on the identifi ed models of environmental protection in urban areas, premises were formulated with regard to the new model for environmental protection in Polish cities. Three scenarios were proposed with regard to potential changes: modification-oriented, reorganization-oriented and radical. The modification-oriented scenario includes: • adding the social aspect to the objectives of nature protection in cities, • extending the scope of the nature conservation act of new nature protection categories appropriate for urban areas, • increasing the importance of the study of conditions and directions for the spatial development and protection plans with regard to the planning permission. Reorganization-oriented scenario provides for: • verifying the objectives of nature protection, • introducing the obligation to prepare management plans for all protected areas in cities, • introducing the obligation to update and prepare development plans for areas were nature conservation areas were established. The radical scenario includes: • introducing new categories of nature protection in urban areas, including categories that ensure preserving and shaping the connectivity of protected area, • exposing ecosystem services as the major motif of nature protection in cities, • introducing new instruments for managing protected areas in cities. Applying one of the abovementioned scenarios may signifi cantly improve the efficiency of natural protection in cities. It may also contribute to introducing a more innovative model for urban nature protection. Each scenarios will entail the implementation of quite significant legislative changes, either in the scope of nature protection and spatial planning.
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Abstract

The cumulative results of investigations of the possibility of using the reclaimed materials after the mechanical, thermal or mechanical-thermal reclamation for making cores by means of the blowing method in the alkaline CO2 technology, are presented in the paper. Three kinds of spent sands: with furfuryl resin, bentonite and alkaline phenolic resin, obtained from the foundry, were subjected to three kinds of reclamation: mechanical, thermal and combined mechanical-thermal, applying for this aim adequate experimental devices. The obtained reclaims were assessed with regard to the degree of the matrix liberation from the determined binding material. Reclaims of moulding sands with binders of the form of resin were assessed with regard to ignition loss values and pH reaction, while reclaims of moulding sands with bentonite with regard to the residual clay content and pH value. In all cases the results of the performed sieve analyses were estimated and the average characteristic diameter dl was determined. The reclaimed matrix was applied as a full substitute of the fresh high-silica sand in typical procedures of preparing core sands used for making shaped samples for bending strength investigations, Rg u .
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Abstract

This paper presents a three-dimensional model of an airbag located outside of a small city car at the front bumper, which is intended to protect the vehicle against the effects of road traffic collisions. Results of numerical simulations of airbag operation in case of collision with two types of obstacles are presented: a flat, vertical wall and a circular pillar with a diameter of 200 mm. The paper presents the physical model, which is the subject of simulation, along with its mathematical description and the numerical calculation scheme used.
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Abstract

The problem of deposit protection and the process of liquidation of mining plants does not find effective solutions in the national law. Nevertheless, this is a very up-to-date issue. This situation prompted the authors of the article to once again analyze these issues. The number of abandoned exploitation sites which were published in the Polish Geological Institute reports should affect the entire licensing system and the state’s raw material policy. As a good host of raw materials, which we have been given by Earth Mother, we cannot allow that the mining licensing system, the liquidation procedures of mining plants without due diligence, result in the lack of protection of these deposits. The rational raw material economy and the ability to exploit it for the future generations, while failing to effectively enforce the site liquidation process makes it necessary to take actions leading to not blocking the mineral deposits in this way. The analysis shows what appropriate actions should be taken. The authors have thoroughly investigated the legal regulations over the past century, compiling them with the current legislation, and pointing out the weaknesses of the system in the field of deposits protection, particularly in the part of the unexploited deposits. Criticism covered both the statutory regulations – Geological and mining law as well as executive acts in the field of deposit protection. A separate analysis was subjected to the procedure of liquidation of the mining plants in the aspect of deposits protection, for mining plants operating on the basis of the Province Marshal’s licenses. The process presented in the flowchart layout clearly shows the weak points of the currently operating system.
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Abstract

When Zamość was being built the Fortress was in a close connection with the geometry of view. This was reflected both in the utilitarian and aesthetic sphere and concerned the urban scale as well as the scale of long exposure. The visual study conducted within the Study of the shaping of postfortress areas of Zamość Fortress allowed for assessing the contemporary state of exposure and for identification of the correction opportunities. The effect of the study has become the essential element of the design concept in both the compositional and in the part related to the tourist access.
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Abstract

Fortyfication Objects of Prussian Ring Fortresses in Poznań and Wrocław (from XIX–XX Cent.) in Current Spatial Planning Documents – Functioning, Protection, Landscape Shaping, Fortifications are valuable elements of cultural heritage of many Polish cities. Unfortunately, in many cases they are not properly used and protected, although some of them have the status of historical monuments. Potentially, tools for strengthening protection of fortifications are provided by spatial planning system. The research was based on detailed analysis of the Study of the Conditions and Directions of the Spatial Management of a Communes and Local Spatial Management Plans, including the area of ring fortresses in Poznań and Wrocław. In the Study of the Conditions and Directions of the Spatial Management of a Commune of both cities one can find references to the location and use of ring fortifications. The area of fortification objects in Poznan is covered by 9 Local Spatial Management Plans, 5 further plans covering the fortifications are in preparation. The area of ring fortress in Wroclaw were covered by 9 Local Spatial Management Plans. The results of the analysis of the spatial planning documents show that the tools used to protect the fortifications offered by the spatial planning system are not fully exploited. The context and landscape values of the fortifications are ignored in most of the plans. Also one can find in spatial planning documents the lack of attempts to link fortress greenery to the greenery system, and, in the case of Wroclaw, the lack of describing fortification greenery as a valuable asset. In most cases, principals of the fortifications objects protection are not enough detailed.
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Abstract

If we want to provide the efficient training intervention to increase the duration of using hearing protection devices (HPDs) by workers, we need a tool that can estimate the person’s hearing threshold taking into account noise exposure level, age, and work history, and compare them with audiometry to find out the percent reduction of workers hearing loss. First, the workers noise exposure level was determined according to ISO 9612, then 4000 Hz audiometry was done to find age and work history. On basis of ISO 1999 the hearing threshold was estimated and if the hearing protection device was not used continuously and correctly, the hearing protection device’s actual performance was reduced adjusted with person’s audiometry. After training intervention, the estimate was done again and was compared with the adjusted audiometry. According to ISO 1999 standard estimation results, the percent reduction of the workers hearing loss level was 6.48 dB in intervention group. This level remained unchanged in control group. The mean score of hearing threshold estimation (standard ISO 1999) was statistically more significant than mean score of hearing threshold (p-value ¡ 0.001). The results show not significant change in control group due to lack of changing of noise exposure level. In regards to the results of hearing threshold estimation based on ISO 1999 and comparing with workers audiometry, it can be seen that BASNEF training intervention increases the duration of using the HPDs and it could be effective in reducing hearing threshold related to noise.
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Abstract

Plastic rocks can creep, therefore the knowledge of the rheological properties of the drilled formations is an important element of the drilling process and when choosing borehole designs. These properties of plastic formations also influence the way in which appropriate drilling technology and drilling mud properties are selected. The article presents the effect of basic rheological parameters of salt from the Fore-Sudetic Monocline deposit on the drilling of boreholes in the mining area of KGHM Polska Miedź, which in the future can be used as a good drilling practice to improve the safety and efficiency of drilling. The process of drilling in plastic rocks may be hindered. Salt is a plastic rock and in the analyzed rock mass it is deposited at a considerable depth. The caprock exerts big loads on it, beside the temperature in the deposit intensifies the rheological properties of the rock. The creep process causes that the borehole contracts, therefore the knowledge about the rheological properties of the drilled rock is very important for establishing the safe time in which the well may remain uncased. The paper is devoted to the influence of basic rheological parameters of salt bed in the Fore-Sudetic Monocline on the process of drilling of a borehole in the area of KGHM Polska Miedź as these data can be used in drilling practice in the future.
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Abstract

The transition of power grids to implement large amounts of nonsynchronous renewables reduces the inertia in the power system. Therefore, the rate of change of frequency (ROCOF) after a fault of given energy is higher in low inertia grids than in grids with mainly synchronous machines operating. Standard faults for the design of existing synchronous machines assume fixed frequency grids, in which an electrically close fault happens. It is not tested, if the machines can ride through transient disturbances with high ROCOF. For ROCOF values of up to 1 Hz/s as foreseen for the upcoming grid code of the Republic of Ireland and up to 2 Hz/s for Northern Ireland, a thorough verification, if generators are capable to ride through such events is necessary. For this study, ROCOF frequency traces provided by the transmission system operators (TSOs) of Ireland were first benchmarked with a full-grid model and in a second step impressed on a model of generators connected to the power grid via a step-up transformer to study transient stability and nonlinear response of the generator. This paper focusses on the ability of nine different synchronous machines to stay connected to the transmission system during severe ROCOF events without losing synchronism.
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Abstract

There are two methods to produce primary copper: hydrometallurgical and pyrometallurgical. Copper concentrates, from which copper matte is melted, constitute the charge at melting primary copper in the pyrometallurgical process. This process consists of a few stages, of which the basic ones are roasting and smelting. Smelting process may be bath and flash. Slag from copper production, on the end of process contain less 0,8%. It is treat as a waste or used other field, but only in a few friction. The slag amount for waste management or storage equaled 11 741 – 16 011 million tons in 2011. This is a serious ecological problem. The following slags were investigated: slag originated from the primary copper production process in the flash furnace of the Outtokumpuja Company in HM Głogów 2 (Sample S2): the same slag after the copper removal performed according the up to now technology (Sample S1): slag originated from the primary copper production process in the flash furnace of the Outtokumpuja Company in HM Głogów 2, after the copper removal performed according the new technology (Sample S3). In practice, all tested slags satisfy the allowance criteria of storing on the dumping grounds of wastes other than hazardous and neutral.
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Abstract

Due to the presence of harmful substances in resins those mould sands may be hazardous to the natural environment and workers. The general assessment of harmfulness of sands used for molds and cores encompasses 2 basic points: emission of hazardous substances during processes of preparing sands, pouring mold with liquid metals (high temperatures), cooling and shaking-out; possibility of washing out hazardous substances from used sands to the environment, during storage or economic use outside foundries. We present the results of research on the emission of BTEX compounds from mould sands with phenolic resins during pouring liquid metal of different temperature (cast iron and Al alloy). The research was conducted according to the original method prepared by the authors, which has been used for years in cooperation with various foundries (Poland, abroad).
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Abstract

Due to the presence of harmful substances in resins those mould sands may be hazardous to the natural environment and workers. The general assessment of harmfulness of sands used for molds and cores encompasses 2 basic points: emission of hazardous substances during processes of preparing sands, pouring mold with liquid metals (high temperatures), cooling and shaking-out; possibility of washing out hazardous substances from used sands to the environment, during storage or economic use outside foundries. We present the results of research on the emission of BTEX compounds from mould sands with phenolic resins during pouring liquid metal of different temperature (cast iron and Al alloy). The research was conducted according to the original method prepared by the authors, which has been used for years in cooperation with various foundries (Poland, abroad).
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