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1

In-situ formed, ultrafine Al-Si composite materials: ductility

Guba P., Gesing A., Sokolowski J., Conle A., Sobiesiak A., Das S., Kasprzak M.

Journal of Achievements in Materials and Manufacturing Engineering

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2019

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Vol. 92, nr 1-2

5--12

EN

Purpose: The work objective includes optimization of the casting production and heat treatment processes that will simultaneously maximize the combination of strength, hardness, and ductility for hypereutectic Al-Si compositions with Si volume fractions of as much as 25 vol.%. In addition, such an in-situ formed composite alloy will attain a unique combination of low production cost, high potential recycled content, and functional characteristics suitable for mission critical aerospace and vehicular applications. Design/methodology/approach: The unique High Pressure Die Casting Universal Metallurgical Simulator and Analyser (HPDC UMSA) was used for melting, cyclic melt treatment, and solidification of the hypereutectic Al-Si-X (A390). The produced as-cast structures contained colonies of nano-diameter Si whiskers and other morphologies, and absence of primary silicon particles. Heat treated structures rendered nano and ultrafine metal matrix composites. Findings: New developed as-cast Al-Si materials containing nano-diameter Si whiskers, without primary silicon particles required ultra short time heat treatment to result in nano and ultrafine metal matrix composite, rendering their hardness, strength and wear resistance, and the same time retaining toughness and ductility. Research limitations/implications: The cast samples were produced in laboratory conditions and potential tensile strength was estimated from empirical correlation with micro-hardness measurements. In the future, the comprehensive mechanical properties need to be tested. Practical implications: These ultrafine Si, Al-MMCs can be net-shape formed by modified HPDC technology or consolidated from spray-atomized alloy powder. Originality/value: Optimization of the entire production process for the hypereutectic Al-Si alloy compositions achieved a uniform distribution of ~ 25 vol.% of ultrafine Si particles in ductile FCC-Al matrix further reinforced by age hardening with nano-scale spinodal GP-zones. The associated mechanical property and ductility improvements will open a wide range of critical lightweighting components in transportation: aerospace, terrestrial vehicle and marine to the optimized hypereutectic Al-Si alloys. Presently, these components do not use the commercial HPDC A390 alloys due to their limited ductility and strength. Proposed new technology will allow conversion of various cast airspace alloys with ultrahigh mechanical properties to the automotive applications.

2

Wpływ obudowy tranzystora SiC MOSFET na sprawność energetyczną falownika klasy DE z pasma 13,56 MHz

Przybyła K., Kasprzak M.

Przegląd Elektrotechniczny

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2018

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R. 94, nr 3

87--90

PL

W artykule przedstawiono wyniki pomiarów falownika klasy DE 12 MHz z tranzystorami SiC MOSFET C3M0120090 (900 V, 22 A, 120 mΩ). Pomiarów falownika dokonano dla dwóch wersji tranzystorów, z obudową TO-247 i D2PAK-7. Badania wykazały, że tranzystory w obudowie D2PAK-7 umożliwiają uzyskanie wyższej sprawności niż tranzystory w obudowie TO-247 (dla E=200 V: ηTO-247=68%, ηD2PAK-7=84%). Uzyskane wartości sprawności nie są mniejsze niż opisywane w literaturze.

EN

Measurement results of 12 MHz Class DE inverter with SiC MOSFET transistors C3M0120090 (900 V, 22 A, 120 mΩ) are presented in the paper. Measurements were done with two versions of transistors, in case TO-247 and D2PAK-7. Laboratory tests showed that transistors in D2PAK-7 case allow to obtain higher efficiency of Class DE inverter than transistors in TO-247 case (for E=200 V: ηTO-247=68%, ηD2PAK-7=84%). Obtained efficiency values are not lower then described in the literature.

3

Problematyka określenia sprawności niskostratnych drajwerów pracujących z częstotliwością 30 MHz

Legutko P., Kasprzak M., Kierepka K

Przegląd Elektrotechniczny

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2018

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R. 94, nr 8

120--123

PL

W artykule przedstawiono sposób określania sprawności wysokoczęstotliwościowych sterowników bramkowych – drajwerów (ang. driver) pracujących z częstotliwościami sięgającymi 30 MHz. Problematyka określenia i wyznaczenia sprawności tego typu układów wydaje się aktualna i niezwykle istotna, gdyż może ona stanowić istotny wskaźnik efektywności sterowania bramką tranzystora MOSFET. W ramach pracy określono sprawności zarówno dla komercyjnych scalonych sterowników bramkowych, jak i konstrukcji własnych autora niniejszego artykułu. Sprawność dyskretnych drajwerów wynosi powyżej 70%, komercyjne konstrukcje charakteryzują się sprawnością na poziomie 50%.

EN

This paper presents a problem of determining the efficiency of high-frequency MOSFET drivers. All drivers have been tested for efficiency in the operating frequency from 10 MHz to 30 MHz. In the project tested two integrated drivers DEIC420, IXRFD630 IXYS Corporation and additionally three discrete drivers 4xEL7104, 8xEL7457 and 8xUCC27526 have been designed. The new discrete drivers design has been developed as a PCB circuit on a thermal clad technology with the use of discrete low power components. The PCB board are made of IMS material, which consist of aluminum base (1.5 mm), the layers of ceramic insulator (100 μm) and cooper layer (35 μm). Additionally, in this paper presents characteristic power input by the MOSFET drivers (Fig. 3) for two operating states: at idle and at gate MOSFET DE275-501N16A load. Also in this paper presents the measurement of parasitic parameters (output, series resistances RDR) for all drivers. At the end, this paper presents the new characteristic efficiency by the MOSFET drivers determined based on equations from (1) to (10). The new MOSFET Drivers have been verified by using the universal laboratory in Department of Power Electronics, Electrical Drives and Robotics Silesian University of Technology.

4

Problematyka komutacji nieoptymalnych w pojedynczym szeregowym dwuczęstotliwościowym jednoczesnym falowniku do nagrzewania indukcyjnegoSingle series simultaneous dual frequency inverter for induction heating, hard switching operation issue

Kierepka K, Legutko P., Kasprzak M.

Przegląd Elektrotechniczny

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2018

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R. 94, nr 3

65--68

PL

W artykule przedstawiono falownik napięciowy o strukturze półmostka wraz z szeregowym obwodem rezonansowym, jako układ testowy do pracy podczas komutacji twardych. Dokonano pomiarów dla trzech typów tranzystorów MOSFET o zbliżonych parametrach prądowonapięciowych. Wykazano możliwość pracy z dużą sprawnością falownika opartego o tranzystory SiC MOSFET przy komutacjach twardych D→sT.

EN

The paper presents half bridge, voltage source inverter with series RLC, as a hard switching test circuit. Three types of similar (voltagecurrent class) MOSFET transistors were implemented and measured. The conducted research proved the possibility of highly efficient operation of hard switching D→sT inverter based on SiC MOSFET

5

Porównanie falowników klasy D-ZVS 300 kHz do nagrzewania indukcyjnego z tranzystorami MOSFET na bazie Si oraz SiC

Kasprzak M., Przybyła K.

Przegląd Elektrotechniczny

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2018

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R. 94, nr 3

60--64

PL

W artykule przedstawiono wyniki porównania falowników klasy D-ZVS, 300 kHz i mocy ok. 20 kW. Falowniki zbudowano na tranzystorze CAS120M12BM2 (SiC, 138 A) oraz 5-ciu równolegle połączonych tranzystorach IXFN 44N80P (Si, 5x25 A). Falownik z SiC MOSFET w porównaniu do 5xSi MOSFET uzyskuje (8-26)% wyższą moc wyjściową, sprawność jest o 2% wyższa, moc sterowania obwodu bramkowego jest 2,5 razy niższa. Równoległe połączenie kilku Si MOSFET jest dopuszczalne w przypadku dużej mocy falownika, ok. 20 kW lub większej.

EN

Comparison results of 300 kHz, 20 kW Class D-ZVS inverters are presented in the paper. Inverters were based on CAS120M12BM2 (SiC, 138 A) transistor and 5 parallel placed IXFN 44N80P (Si, 5x25 A) transistors. The inverter with SiC MOSFET in comparison with 5xSi MOSFET achieves (8-26)% higher output power, higher efficiency by 2% and gate circuit power losses are 2.5 times lower. The parallel placement of several Si MOSFET transistors is acceptable in the inverter of high power, 20 kW or more.

6

Pattern of secondary infection with Saprolegnia spp. in wild spawners of UDN-affected sea trout Salmo trutta m. trutta (L.), the Słupia River, N Poland

Ciepliński M., Kasprzak M., Grandtke M., Giertych M., Steliga A.

Oceanological and Hydrobiological Studies

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2018

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Vol. 47, No. 3

230--238

EN

Ulcerative dermal necrosis (UDN), a disease of unknown etiology affecting salmonids, has been observed in some rivers in the north of Poland since 2007. Fish affected by UDN die, inter alia, as a result of secondary infection caused by water molds from the Saprolegnia genus. UDN is considered to be an important factor affecting the decline of Polish salmonid populations observed in recent years. Patterns of secondary infection and differences between sexes in UDN-affected wild, adult sea trout (Salmo trutta m. trutta) during the 2014 and 2015 spawning season have been described on the basis of photographic documentation and image analysis. Male fish are most commonly infected in the dorsal region, while females in the head and tail areas. When comparing the infection patterns in both sexes, it is clear that large areas of flanks are significantly more frequently infected in males than in females. The dorsal half of the tail fin is most commonly affected by pathological changes in females. These findings are discussed in relation to various factors predisposing salmonids to Saprolegnia spp. infections during the spawning season. The presented infection patterns can be helpful in preliminary diagnosis of early stages of secondary infection with Saprolegnia spp. in UDN-affected salmonids.

7

Relikty piwnicy z XVI w. przy kościele Wniebowzięcia NMP w Gdańsku

Samól P., Kasprzak M.

Architectus

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2018

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Nr 3 (55)

15--26

PL

Kościół Wniebowzięcia NMP w Gdańsku, jedna z największych ceglanych świątyń gotyckich na świecie, pozbawiony jest kaplic zewnętrznych – z wyjątkiem Izby Rajców. Jego forma nie jest jednak wynikiem realizacji jednego projektu, a kilku zmieniających się koncepcji. Odkrycie reliktów XVIwiecznych piwnic, zlokalizowanych w narożniku transeptu i nawy północnej korpusu nawowego daje pogląd o procesie zabudowywania przestrzeni wokół świątyni, który został przerwany przez reformację. Artykuł podsumowuje dotychczasowe etapy badań architektonicznych i archeologicznych, które były prowadzone w związku z trwającymi od 2016 r. pracami konserwatorskimi. Ich częścią jest także adaptacja dawnej nieużywanej kotłowni z 1929 r. na salę multimedialną. To właśnie w jej murach odkryto starsze konstrukcje, swoimi początkami sięgające końca średniowiecza. Celem niniejszego artykułu jest przedstawienie wyników prowadzonych badań oraz omówienie kontekstu historycznego i funkcjonalnego odnalezionych reliktów piwnic kościoła Wniebowzięcia NMP w Gdańsku.

EN

Saint Mary’s church in Gdańsk, one of the largest brick Gothic temples in the World, has got no external chapels – except the House of Councils. Its architectural form, however, is not the result of implementation of one project, but realization of a few transforming concepts. The discovery of the relicts of the 16thcentury cellars, located in the corner of the transept and the northern aisle, gives an idea of the process of building the space around the temple, which was interrupted by the Reformation. The paper summarizes the architectural and archaeological researches, which have been conducted since 2016 in connection to the conservational works. Their part is also the adaptation of the former unused boiler cellar from 1929 on the multimedia room. There was the space, where one discovered the relicts of the older constructions from the end of the Middle Ages. The aim of this article is to present the results of conducted research and to discuss the historical and functional context of the found relicts of cellars.

8

Zastosowanie metod geofizycznych do rozpoznania warunków hydrogeologicznych w osadach czwartorzędowych na przykładzie Wrocławia

Olichwer T., Buczyński S., Sobczyk A., Kasprzak M.

Przegląd Geologiczny

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2017

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Vol. 65, nr 11/1

1134--1138

EN

In order to better constrain the hydrogeological conditions to the depth of 50 m in the area of water extraction for Wroclaw city, a multi-faceted geophysical survey has been applied. We have combined electrical resistivity tomography (ERT), ground penetrating radar (GPR) and magnetic resonance sounding (MRS) techniques. The results of geophysical investigations indicate the presence of three rock layers with different permeability. The first layer, up to 2 m below ground surface, represents a discontinuous horizon composed of impermeable rocks. The next one, a porous and permeable stratum (aquifer) with a thickness of approx. 5-10 m, comprises saturated sands and gravels. The observed aquifer is characterized by good hydrogeological parameters, wherein hydraulic conductivity (k) equals 5 X 10-4 m/s and porosity reaches 23%. The third layer, below 10 m, is composed of loamy impermeable sediments intercalated with moraine till. At greater depths (>20 m) they are still loamy rocks, but occurring with interbeds of sands (sandy loam). This is confirmed by the hydraulic conductivity in the order of 10-6 m/s, which is typicalfor semi-permeable rocks. Noteworthy, no additional aquifers have been observed to the depth of 50 m.

9

Tabu search for the RNA partial degradation problem

Rybarczyk A., Hertz A., Kasprzak M., Blazewicz J.

International Journal of Applied Mathematics and Computer Science

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2017

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Vol. 27, no. 2

401--415

EN

In recent years, a growing interest has been observed in research on RNA (ribonucleic acid), primarily due to the discovery of the role of RNA molecules in biological systems. They not only serve as templates in protein synthesis or as adapters in the translation process, but also influence and are involved in the regulation of gene expression. The RNA degradation process is now heavily studied as a potential source of such riboregulators. In this paper, we consider the so-called RNA partial degradation problem (RNA PDP). By solving this combinatorial problem, one can reconstruct a given RNA molecule, having as input the results of the biochemical analysis of its degradation, which possibly contain errors (false negatives or false positives). From the computational point of view the RNA PDP is strongly NP-hard. Hence, there is a need for developing algorithms that construct good suboptimal solutions. We propose a heuristic approach, in which two tabu search algorithms cooperate, in order to reconstruct an RNA molecule. Computational tests clearly demonstrate that the proposed approach fits well the biological problem and allows to achieve near-optimal results. The algorithm is freely available at http://www.cs.put.poznan.pl/arybarczyk/tabusearch.php.

10

Combined thermal, microstructural and microchemical analysis of solidification of Al25Si3Cu alloy

Guba P., Gesing A., Sokolowski J., Conle A., Sobiesiak A., Kasprzak M.

Archives of Materials Science and Engineering

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2017

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Vol. 85, nr 2

49--79

EN

Purpose: This paper present thermal and microstructural and microchemical analyses were conducted on the unmodified experimental alloy Al20Si3Cu (B390.1) solidified in the High Temperature Universal Metallurgical Simulator and Analyser (HT UMSA) under atmospheric pressure (0.1 MPa) and a relatively low solidification rate (-1.2 K/s just after end of solidification), for identification of the thermal events during solidification and the phases in the as-cast structure. Design/methodology/approach: The HT UMSA platform, using a low thermal mass stainless steel cup, enabled the acquisition of high resolution thermal analysis data. Design/methodology/approach: A new approach for de-convolution of the first derivative thermal curves allowed detailed thermal and microstructural phase histories to be documented for solidification of Al-Si alloys. Recently developed SEM/EDS methodology allowed to determine composition and distribution of individual phases that are smaller than the X–ray volume. Findings: Simultaneous consideration of thermal microstructural and microchemical information allowed detailed understanding of the series of events that take place during solidification of Al casting alloy with complex chemistry. In our hypereutectic alloy we document growth of Al(1) dendrites and formation of secondary Si(2) and Al(2) phases all at temperatures higher than the binary equilibrium Al-Si eutectic temperature of 850 K. Practical implications: Even at this slow solidification rate detailed understanding of the solidification microstructure requires consideration of non-equilibrium processes during solidification. Originality/value: We propose an original set of hypotheses that consistently explain the observed non-equilibrium solidification behaviour. Proof of these hypotheses is beyond the scope of this work.

11

Zjawiska krasowe w skałach metamorficznych w Masywie Śnieżnika (Sudety Wschodnie ): aktualny stan badań oraz znaczenie dla poznania ewolucji Sudetów w późnym kenozoiku

Sobczyk A., Kasprzak M., Marciszak A., Stefaniak K.

Przegląd Geologiczny

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2016

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Vol. 64, nr 9

710--718

EN

The paper reviews the recent state ofstudies for karst phenomena on northern slopes of the Śnieżnik Massif, Krowiarki range and Zlote Mts in East Sudetes with particular reference to Biała Lądecka basin. Conflned spatial character of the d/ainagf basinand cave sites within allow a better understanding of landscape response to climate and tectonic proxies controlling landscape evolution at least since the end ofMiocene (Messinian). New karst passages discoveries from Niedźwiedzia Cave resulted in the recognition of several sites of allochthonous sediments deposited at different cave morphological levels up to 50 metres above Kleśnica river floor. Furthermore, a new model ofpolygenetic origin for some karst chambers in Niedźwiedzia Cave originating from karstification processes and mass-movements superimposed has been suggested. Presumably, it may be linked with neotectonic processes and/or climatic changes affecting East Sudetes during the Late Cenozoic.

12

Układy dopasowania L-C oraz L-LC w falownikach klasy D do nagrzewania indukcyjnego – teoria i praktyka

Kasprzak M., Legutko P., Kierepka K

Przegląd Elektrotechniczny

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2016

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R. 92, nr 6

8--11

PL

W artykule opisano dwa układy dopasowania wzbudnika do nagrzewnicy indukcyjnej z falownikiem klasy D - szeregowy L-C oraz szeregowo-równoległy L-LC. Zaproponowano niespotykane przekształcenie układu L-C na L-LC z wykorzystaniem tego samego kondensatora obwodu rezonansowego. Porównano falowniki 1,5kW/300 kHz z takimi obwodami wykazując zarówno korzyści zastosowania obwodu L-LC jak i jego wady.

EN

Two load matching circuits of Class D inverter for induction heating applications are presented in the paper: serial resonant L-C and series-parallel L-LC. The new reconfiguration of L-C into L-LC based on the same resonant capacitor is proposed. Two 1,5kW/300kHz inverters are compared to emphasize advantages as well disadvantages of L-LC circuit.

13

Proces łatwy i szybki? Modernizacja SUW w małym przedsiębiorstwie

Kasprzak M.

Kierunek Wod-Kan

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2016

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Nr 3

44--47

PL

Stacja uzdatniania wody w Nochowie po prawie 30 latach pracy wymagała nakładów inwestycyjnych związanych głównie z wyeksploatowaniem pracujących na niej urządzeń. Skorodowane i przeciekające zbiorniki, niesprawna armatura i wyeksploatowane pompy... jak z modernizacją obiektu poradziły sobie wodociągi w Śremie?

14

The Rogowiec Landslide Complex (Central Sudetes, SW Poland) : a case of a collapsed mountain

Kasprzak M., Duszyński F., Jancewicz K., Michniewicz A., Różycka M., Migoń P.

Geological Quarterly

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2016

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Vol. 60, No. 3

695--713

EN

The paper focuses on a large relict landslide complex in the northeastern part of the Kamienne Mts. (Sudetes, SW Poland) developed on Carboniferous and Permian volcanic and clastic sedimentary rocks. Whilst the presence of mass movements around Mt. Rogowiec has long been known, no attempts have yet been made to offer a comprehensive analysis. This study is based on recognition of geomorphic features from LiDAR-derived DTM, geomorphometric analysis, field geomorphological mapping, joint measurements at representative exposures, and electrical resistivity tomography. The total area affected by gravitational slope deformation exceeds 40 ha and consists of a few smaller units that show distinctive patterns of displacement. The eastern slopes of the Mt. Rogowiec ridge have been reshaped by large slides involving rigid blocks of trachyandesite in the upper part and deformed sedimentary successions in the middle and lower part. The central part of the area has experienced lateral spreading which resulted in complete disintegration of the volcanic cap. Fresh-looking ridge-top trenches indicate that this process is ongoing. Subsequent movements included flows into pre-existing valleys and rock wall collapses to produce spectacular block streams. The scale and variety of deformation structures at Mt. Rogowiec make this locality unique in the Sudetes.

15

Wysokoczęstotliwościowe falowniki rezonansowe klasy DE i E – modelowanie, sterowanie, zastosowania

Kasprzak M., Kaczmarczyk Z., Legutko P., Zaleśny P.

Prace Naukowe Politechniki Śląskiej. Elektryka

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2015

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z. 4

69--80

PL

W artykule zaprezentowano dwa falowniki rezonansowe klasy DE i E, bazujące na tranzystorach MOSFET i pracujące w zakresie częstotliwości megahercowych. Opisano zasadę działania obu falowników oraz ich modele analitycznonumeryczne. W modelach falowników uwzględniono pojemności wyjściowe oraz skończone czasy wyłączania tranzystorów MOSFET. Opisano najnowsze tranzystory RF Power MOSFET oraz ich drajwery – dyskretne i rezonansowe. Podano przykład zastosowania falownika klasy DE o mocy 500 W i częstotliwości 13,56 MHz do nagrzewania dielektrycznego.

EN

Two resonant inverters, Class DE and E, based on MOSFET transistors and at frequencies in the megahertz’s range are described in the paper. The operation principle and analytically-numerical models are presented. The output capacitance and sufficient switch-off time of MOSFET is taken into account in inverter models. The most recent RF Power MOSFET transistors and two types of gate drivers are described – discrete type and resonant type. An example of application of 500 W/13,56 MHz Class DE inverter dedicated to dielectric heating is discussed too.

16

A multi-coil wireless power transfer (MC-WPT) system - analysis method and properties

Kaczmarczyk Z., Bodzek K., Ruszczyk A., Kasprzak M., Domoracki A.

Measurement Automation Monitoring

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2015

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Vol. 61, No. 10

480--483

EN

The paper is devoted to some problems of multi-coil wireless power transfer (MC-WPT) systems. It is well known that the effective gap for MC-WPT systems can be extended for relatively long distances preserving high efficiency. The paper is organized as follows. In Section 2, the system is described by a matrix model. This model is prepared to determine system properties. In Section 3, the optimization procedure which allows improving the system performance at the desired operating point is introduced. Section 4 contains the results of experimental verification. Moreover, the paper presents an interesting phenomenon of the current unbalance among the system coils.

17

Electrical resistivity tomography (ERT) of pit-and-mound microrelief, Mt Rogowa Kopa case study, the Stołowe Mountains, SW Poland

Pawlik Ł., Kasprzak M.

Landform Analysis

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2015

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Vol. 29

41--47

EN

This article presents results of geophysical analyses based on electrical imaging of slope mantles with pit-and-mound microtopography developed on the Rogowa Kopa hillslope in the Stołowe Mountains, SW Poland. The use of two dimensional electrical resistivity tomography (2D ERT) to non-invasive analyses of the hillslope microrelief allowed completing previous results of geomorphological and soil studies. The tomograms (inversion results) acquired across individual forms of treethrow pits and mounds can be interpreted according to regolith thickness and its wetness, but also smaller features such as relict and fresh tree root systems detected in the mounds. These features were compared to a general picture of geoelectrical resistivity measured in the main cross-section of the analyzed hillslope. The differences in slope cover characteristics observed on the tomograms confirm important role of the tree uprooting process in formation of some basic features of the regolith and soils, including their uneven redistribution across the hillslope.

18

Design and Implementation of Wireless Module Based on ZiGBee for Applications in Machine Tools

Kasprzak M.

Journal of Machine Engineering

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2015

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Vol. 15, No. 4

133--143

EN

This paper presents a concept of a wireless measuring system based on ZigBee modules, and the stages in its implementation. The distinctive feature of the built measuring systems is their high resistance to environmental conditions. To a large extent this was achieved through the use of induction charging. The effectiveness of this solution was determined by comparing it with conventional charging. The measuring modules built in accordance with this concept were tested in the work space of a machine tool during milling. Special attention was paid to the amount of power consumed by the tested modules during different modes of their operation. The response time of the modules during their operation in the work space of the working machine tool and in the case when the modules were completely immersed in water was tested. By comparing the measured response times the effect of the above factors on the correctness of operation of the measuring system was determined.

19

Late cenozoic tectonic activity of The Śnieżnik Massif area (the Sudetes, SW Poland) in the light of LiDAR DEM morphometric analysis

Sobczyk A., Kasprzak M.

Studia Geomorphologica Carpatho-Balcanica

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2014

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Vol. 48

35--52

EN

The Śnieżnik Massif represents a prominent morphological feature in the East Sudetes, which is bounded by a system of faults controlling its differential uplift. Vertical movements originated at least during the Oligocene times, with culmination phase in the Pliocene times, whereas estimated total uplift was in the range of 500–1000 meters. This study presents a qualitative (geomorphometric) and quantitative (morphotectonic) approach that combines the Late Cenozoic tectonic uplift model with landscape evolution theories. Application of basin asymmetry factor (AF) and hypsometric integral (Hi) analyses allowed recognizing a NW trending, presumably tilted, fault blocks. They originated as a result of the Palaeogene planation surface braking and differential uplift. Uplift and later fault-block tilting in the Śnieżnik Massif morphotectonic unit, were generally realized along NE-SW striking the Wilkanów fault to the west and WNW-ESE striking southern fault zone, as expressed here e.g. by Potoczek-Branna, Hermanice and Pisary faults.

20

Zasięg obszarów objętych osuwiskami w Górach Kamiennych (Sudety Środkowe) : porównanie map geologicznych i cyfrowego modelu wysokości z danych LiDAR

Migoń P., Jancewicz K., Kasprzak M.

Przegląd Geologiczny

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2014

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Vol. 62, nr 9

463--471

EN

The east-central part of the Kamienne Mountains in the Sudetes has long been known as an area where landslides occur in abundance. Their extent was shown on first detailed geological maps from the early 20th century and later on Polish geological maps published in the 1970 and 1990. The total landslide area mapped was about 100 ha. The availability of LiDAR data allowed to build digital elevation models of very high resolution and to attempt landslide mapping using diagnostic landform assemblages as guidelines. 30 separate landslides have been mapped, including complex landslide areas involving overlapping landslide bodies oflikely different origin. The total landslide area is at least300 ha, while the largest complexes cover 40-50 ha. LiDAR-based models proved extremely useful in landslide mapping, espe- cially in forested areas.