Polska Akademia Nauk

Warsaw, Poland

Polska Akademia Nauk

Warsaw, Poland
Time filter
Source Type

Tulik M.,Samodzielny Zakad Botaniki Lesnej | Jura-Morawiec J.,Polska Akademia Nauk
Sylwan | Year: 2017

The trade-off in case of water transport is captured in ecological theory by the safety vs. efficiency concept. As the efficiency of transport of water depends mainly on the dimensions of the conductive elements in wood, this paper presents the survey on some methods that allow to quantify the tracheids and vessels attributes including their diameter (tangential/radial, hydraulic), length as well as arrangement (axial, radial). Each trait of conductive elements is briefly described and formula for its calculation is given. Moreover, the usefulness of measurable traits for calculating the meso- and xeromorphy index is presented. Given the fact that the structure of pits and complexity of perforation plate (scalariform, ladder-like) are important factors in wood hydraulic resistance, the following parameters were additionally characterized: the pit membrane diameter, pit membrane thickness, pit chamber depth and the number of bars per perforation plate between the adjacent vessel elements.

Agency: European Commission | Branch: H2020 | Program: RIA | Phase: REFLECTIVE-5-2015 | Award Amount: 2.49M | Year: 2016

The main purpose of this project is to deliver new empirical yet also theoretically informed knowledge of those memory agents, practices and contexts capable of countering fixed and essentialist war and conflict memories, opening them to reflexive reinterpretation and change. Theoretically, the project will develop the concept of an agonistic ethico-political mode of remembering as distinct from the antagonistic and cosmopolitan modes, and provide a thick description of their defining characteristics. A related aim is to assess which of the two reflective modes, the cosmopolitan or the agonistic, best contributes to a shared European ethico-political framework and transnational solidarity. Empirically, the project will test the different ethico-political modes of remembering in contemporary heritage discourses and practices by different memory milieus located at various territorial scales in relation to some of the armed conflicts of the 20th century with an enduring legacy. By exploring the relationship between 1) the modes of remembering being negotiated and contested in various European settings; 2) the memory agents promoting them (heritage professionals, policy-makers, historians, creative artists, socio-political activists); and 3) material and immaterial heritage (museums, burial sites, media, visual and written culture), the project will assess how, why and in which contexts certain modes of remembering the violent past are able to prevail as well as their articulation with various territorial identities.

Composition and changes in foraminiferal assemblages recorded in the uppermost part of the sub-evaporite deposits of the Busko (Młyny) PIG-1 borehole (depth 188-192 m) in the northernmost part of the Fore-Carpathian Basin (Central Paratethys) indicate that the basin, in which marly deposits have originated, was poorly ventilated with a great oxygen deficit in the bottom waters, and was characterised by mainly eutrophic conditions in surface waters. The basin was 50-70 m deep. The waters were cool and of normal seawater salinity, although the recorded (in the uppermost part of the section) almost complete disappearance of Uvigerina foraminifers, occupation (for a short time) of the vacant niche by Fursenkoina acuta (assemblage D4c), and the dominance of Bulimina elongata (tolerant to increased salinity) in the youngest assemblage (D4d) may indicate a considerable increase of seawater salinity during the deposition of the uppermost part of the subevaporite strata. The gypsum section is characterised, when compared to the more marginal gypsum sections of the Nida Trough, by a reduction of the lower, autochthonous part of the gypsum section and a specific development of the lowermost gypsum unit. It contains gypsum nodules resembling small, chaotically arranged gypsum intergrowths in the clayey matrix. Such facies is regarded as the skeletal facies of the giant gypsum intergrowth facies of the Nida Trough and Moravia, and is related to depositional lows at the beginning of the gypsum deposition. The gypsum sequence in this borehole indicates a deeper sedimentary environment than inferred for the Nida Trough.

The aim of this paper is to present the diagenetic processes occurring within lacustrine chalk and ooze in Holocene deposits from northwestern Poland. The analysed samples came from the Tarda (Iława Lake District) and Suliszewo (Choszczno Lake District) sites. For the purpose of mineral composition determination, both modern and classic (thermal analysis) research methods were applied. Composition analysis on a microprobe (Scanning Electron Microscopy) and X-ray structural analysis (Powder X-ray Diffraction) were used. Effects of early diagenesis processes (eodiagenesis) are observed in these sediments. The most important diagenetic processes include dissolution of carbonate minerals, pyrite and quartz. An important role was also played by pyritization and formation of early carbonate cements. Compaction occurred only on a small scale. Moreover, the sequence of the diagenetic processes was reconstructed. The earliest diagenetic process that occurred within the lacustrine chalk and ooze was the formation of micritic cement and pyritization. Successively, the whole sediment was undergoing dissolution processes, followed by compaction. After dehydration and drying of the samples, gypsum and halite crystallized from the pore waters.

The paper contains summary of the earlier studies of Lower Devonian palynostratigraphy and new results that relate to Middle and Upper Devonian and Frasnian. In the Giełczew PIG 5 borehole, the basal part of the Giełczew Member of the Telatyn Formation is included in the apiculatus-proteus (AP) Zone of the Emsian/Eifelian transition. The higher part of this unit is included in "Geminospora" extensa (Ex) Zone, Ex 3 Subzone, and the Geminospora aurita (Aur) Zone of mid and upper Givetian. The topmost part of the unit (Giełczew PIG 5 borehole) belongs either to the Aur Zone or to the succeeding zone Tholisporites densus (Den). This part of the section belongs either to the Givetian or to Frasnian. The presence of the Den zone in topmost part of the Giełczew Member (Giełczew PIG 6 borehole) has been ascertained. In the Terebiń IG 5 borehole, the Telatyn Formation, starting from the żniatyń Member, is included in The Ex 2, Ex 3 subzones and the Aur Zone. The uppermost part of the Rachanie Member belongs either to the Aur Zone or to Den Zone. The Frasnian index species Cristatisporites deliquescens has been recorded from the Krzewica Member of the Modryń Formation from the Terebiń IG 5 borehole. Stratigraphical information provided by the study of phytoplankton is not significant, but is consistent with the spore stratigraphy. Fluctuations of phytoplankton taxonomic diversity document some of the T-R cycles in the Lublin basin.

The paper presents the results of studies related to the desalination of low dissolved mineral content geothermal waters from the Banska IG 1 well using a dual hybrid system based on ultrafiltration and reverse osmosis. The desalination of geothermal waters may be considered a possible solution leading to the decentralisation of drinking water supply. In many cases, using cooled waters for drinking purposes may be considered an alternative method of disposing of them, in particular for open drain arrangements, i.e. where cooled water is dumped into surface waters. However, the utilisation or disposal of the concentrate in a fashion that is safe for the environment is an important part of the arrangement.

Stefanowicz J.A.,Polska Akademia Nauk
Biuletyn - Panstwowego Instytutu Geologicznego | Year: 2012

The right to geological information is a valuable geological law subject and it is asset of property. On the ground of geological and mining law, geological information, including documentation and geological concessions, constitutes geological-mining assets. The author characterizes the right in the subjective and objective approach and in terms of the content of the law. The new law of 09 June 2011 introduces significant changes to the definition of the geological information, regulation and execution of this right. The paper points to a new statutory resolution and attempts to provide interpretation.

The paper presents a history of applied geomorphology and its achievements and applications in the past 60 years, in the Department of Geomorphology and Hydrology in Krakow at Institute of Geography and Spatial Organization Polish Academy of Science. The research included landform assessment and studies of present processes and was mainly focused on the mountain range of the Carpathians and the Silesian-Krakow Upland. Other studies involving applied geomorphology were carried out in the monsoon climate zone, in the area of Himalaya and its foreland frequently affected by heavy rainfall. © 2014, WULS - SGGW Press. All rights reserved.

The article presents the reconstruction of dynamics and development of a landslide in Wia̧g. The study area is located in lower Vistula valley, near Świecie. Research conducted since 2007 shows that the landslide in Wia̧g had developed in stages. Aerial photography from the last 50 years have been used in order to define the dynamics of the landscape. The first phase of development was a shallow landslide in the eastern part. In 1979, during one of the biggest floods in XXth century the most important episode took place. A landslide with the area of 22000m2 arose. In next few years the landslide hasn't shown any significant activity. In 2010, during the flood, it revived. There has been conducted an analysis of geological structure and water levels, that enabled to define the main factors causing the rise of the landslide. One of the most important factors is the loss stability of the slope caused by increased pore pressure during the rapid decrease of flood wave.

Mountains of Central Europe (like Carpathians) and monsoonal SE Asia are characterised by different rainfall regime and various frequency of extreme events. The altitude and course of mountain ranges decide on the direction of mass advection. But the geomorphological effects are regulated by substratum, relief and degree of degradation of natural ecosystems. The low Carpathians are affected by masses of various directions, carring downpours and continuous rains. High ranges of Himalayas form a barrier, which can not be crossed. Therefore the rainfalls rapidly drop down in the mountain interior (fig. 4, 5). The steep front of the Meghalaya Plateau receive the highest rainfall in the global scale. A distinct role is played by convection, therefore most of downpours has a local character (fig. 9, table 1). The high frequency of heavy rains is responsible for creation of armoured stony layer on the ground surface.

Loading Polska Akademia Nauk collaborators
Loading Polska Akademia Nauk collaborators