Wyniki wyszukiwania - Biblioteka Nauki

1

Piezomagnetic parameters of the magnetostrictive materials

100%

Kaczkowski Z.

Archives of Acoustics

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1998

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tom Vol. 23, no. 2

307--330

EN

Piezomagnetic parameters of magnetostrictive materials and transducers are discussed. Properties of piezomagnetic materials are characterized by piezomagnetic coefficients occurring in the piezomagnetic equations and by the other physical parameters and quantities. A measure of the effectiveness of energy conversion is a magnetomechanical coupling coefficient, which, in addition to mechanical, magnetomechanical and magnetic quality factors, a piezomagnetic dynamics and an electroacoustical efficiency, a vibration amplitude, etc., permits to compare properties of the piezomagnetic materials and transducers. These parameters are useful in both theory and applications of piezomagnetic materials and transducers.

2

Long-term changes in the fish community structure revealed by gillnet monitoring in a shallow, lowland reservoir

63%

Kaczkowski Z. , Franakiewicz P.

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2017

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tom 47

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nr 3

3

Piezomagnetic dynamics and magnetomechanical coupling in Fe-Co-Ni-Zr-Cu-Nb-B amorphous alloy

51%

Kaczkowski Z. , Milewska E. , Lanofte L. , Müller M.

Hydroacoustics

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1999

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tom Vol. 2

194--200

EN

Magnetic field dependences of the piezomagnetic dynamics and the magnetomechanical coupling on the heat-treatment and magnetic bias field in the Fe62.5Co6Ni7.5Zr6Cu1Nb2B15 alloy strips were investigated. The magnetomechanical coupling coefficient increased from 0.10-0.12 for as-quenched samples to 0.38 after annealing at 390˚C.

4

The influence of the ecohydrological rehabilitation in the cascade of Arturówek reservoirs in Łódź (Central Poland) on the cyanobacterial and algae blooming

51%

Szulc B. , Jurczak T. , Szulc K. , Kaczkowski Z.

Oceanological and Hydrobiological Studies

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2015

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tom Vol. 44, No. 2

236--244

EN

The objective of the studies included a complex of three reservoirs (upper, middle and lower Arturówek) which play an important recreational role for the residents of the Łódź city and the surrounding areas. The reservoirs were constructed on the Bzura River and are located in the area of the Łódź Hills Landscape Park. The river, the ecological status of which was defined as moderate, has a great influence on the quality of water in the Arturówek reservoirs. A total of 36 planktonic samples were collected in 2011-2013 during spring, summer and autumn seasons. During the studies, the selected physical and chemical parameters were measured. In addition to taxonomic analysis of Cyanobacteria and algae, the analyses of abundance and biomass of phytoplankton and the concentration of microcystins in water were conducted. In 2013, ecohydrological rehabilitation of the Arturówek reservoirs was carried out. Investment works included: removal of the bottom sediments to reduce internal loads, construction of buffer vegetation zones (ecotones) and sedimentation-biofiltration systems to reduce the amounts of pollutants flowing into reservoirs with rainwater. Significant changes in the structure of phytoplankton were observed in 2013. Every year, the disappearance of Cyanobacterial blooms was observed in favor of an increasing contribution of algae.

5

Ultrasound velocities and magnetomechanical coupling in Fe Co-Ni-Zr-Cu-Nb-B alloy strips after heat treatment

51%

Kaczkowski Z. , Muller M. , Lanotte L.

Hydroacoustics

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2001

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tom Vol. 4

101--104

EN

The magnetic field and beat-treatment dependences of the ultrasound velocities at constant magnetic field (CH) and at constant magnetic induction (cB) and magnetomechanical coupling were investigated in Fe62.5Co6Ni7.5Zr6Cu1Nb2B15 alloy strips in an as-quenched state and after annealing above the Curie temperature. After annealing above 350oC (up to 390oC) the magnetomechanical coupling coefficient (k) was three times higher than that for asquenched state (0.10-012), i.e. k = 0.32-0.37. The minimum values of the cH (= 3.6 km/s) were observed after annealing in the temperature range from 350 to 390oC at 75-100 A/m. There are equal or somewhat higher values of bias field for the minimum of the cH than in some other iron-rich amorphous alloys. Effect de was very small for as-quenched samples. When the samples reached the magnetic saturation, the domain structure vanished and then the Hooke's law was valid, i.e. EH = EB = E, where E was then material constant, known as Young's modulus and then the ultrasound velocities are also material constant.

6

RNA/DNA ratio as an indicator of the impact of long-term accumulative contamination for the assessment of river degradation – a pilot study

51%

Mankiewicz-Boczek J. , Kaczkowski Z. , Godowska M. , Zalewski M.

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tom 10

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nr 2-4

EN

To improve our understanding of the hierarchy of human induced modifications of the natural environment, with particular regard to the controlling strength of the habitat or chemical impacts, it was found to be appropriate to employ indicators at a molecular level. This paper examines the potential use of the analysis of the RNA/DNA ratio for the evaluation of the ecological status of two rivers of Central Poland. The study confirmed that analysis of the RNA/DNA ratio has the potential to be a sensitive indicator of river degradation. It is also a useful screening method for the evaluation of the impact of prolonged sub-lethal contamination of freshwater ecosystems dominated by tolerant fish species such as the perch, Perca fluviatilis L.

7

Influence of heat-treatment and magnetic field on the ultrasound velocities in the Fe72.5Cu1Nb4Sil3.5B9 amorphous ribbons

51%

Kaczkowski Z. , Milewska E. , Lovas A.

Hydroacoustics

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2000

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tom Vol. 3

231--236

EN

Ultrasound velocities as the functions of the bias magnetic field and annealing temperature were investigated in the Fe72.5Cu1Nb4Sil3.5B9 alloy. The samples were annealed in vacuum for 1 h in the temperature range from 200 to 700oC The maximum changes were observed after annealing at the temperature of 450oC when the magnetomechanical coupling coefficient reached maximum value (k = 0.62). The ultrasound velocities were ehanging from 3.5 to 5.3 km/s depending on the magnetic bias field and the thermal-treatment history.

8

Ultrasound velocities in Fe-Cu-Nb-Si-B alloy

51%

Kaczkowski Z. , Milewska E. , Duhaj P. , Vlasak G.

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tom Vol. 19

125-132

9

Interaction between magnetoelastic waves produced by acoustic and magnetic excitation

51%

Lanotte L. , Kaczkowski Z. , lannotti V.

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tom Vol. 19

149-156

10

Reproduction of nase, Chondrostoma nasus (L.), under controlled conditions.

45%

Zarski D. , Targonska K. , Ratajski S. , Kaczkowski Z. , Kucharczyk D.

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nr 4

11

Ultrasound velocities in Fe44Ni30Nb3Cu1Si13 B9 alloy strips

38%

Kaczkowski Z. , Vlasak G. , Svec P. , Duhaj P. , Milewska E. , Krzyżewski A. , Danis E.

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tom Vol. 83, nr 27

407-412

EN

Strips cut out from the Fe44Ni30Nb3Cu1 Si13B9 metallic glass alloy ribbons were measured in as-quenched state and after annealing, for 1 h in vacuum in the temperature range from 350 to 500°C. The strips were 50 mm long, 4.5-5.0 mm wide and about 20 žm thick. The resonat-antiresonat method was used. The ultrasound velocities in the strips depending on the heat-treatment and magnetic bias field were changing from about 3500 to 5000 m/s. The maximum values of the magnetomechanical coupling coefficient (km = 0.58) were obtained after annealing at 450°C. After annealing at 470°C the magnetomechanical coupling coefficient dropped to 0.49 because the noncrystalline structure had began to form.

12

Ultrasound Velocities In Fe 73.5 Cu1 Nb1, Ta2 Si13.5 B9 Alloy Strips After Annealing in Vacuum Above Curie Temperature and Their Dependence on Magnetic Field

38%

Kaczkowski Z. , Vlasak G. , Śvec P. , Buhaj P. , Milewska E. , Krzyżewski A. , Danis E.

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2000

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tom Vol. 21

101-108

13

Magnetomechanical coupling in Fe73.5Cu1Nb1Ta2Si13.5B9 alloy strips after annealing up to 700°C and its dependence on magnetic field

38%

Kaczkowski Z. , Vlasak G. , Śvec P. , Duhaj P. , Milewska E. , Krzyżewski A. , Danis E.

Hydroacoustics

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2001

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tom Vol. 4

105--108

EN

A magnetomechanical coupling in the Fe73.5Cu1Nb1Ta2Si13.5B9 metallic glass strips in as-quenched state and after annealing in vacuum at the temperature range from 100 to 700oC was investigated. The maximum values of the magnetomechanical coupling coefficient (k) were obtained after annealing at 450oC (km = 0.38). Decrease of the magnetomechanical coupling (to 0.2 after annealing at 470oC, to 0.15 after annealing at 500oC, and to zero after annealing at 700oC) and a drop of the saturation magnetostriction (αs) of this alby from (23-25) x 10-6 for as-quenched state and after annealing at 450oC to 10 x 10-6 after annealing at 500oC, and to about 2 x 10-6 after annealing at 550oC is connected with the forming of the nanocrystalline phase. The ultrasound velocities in the strips depending on the heat treatment and magnetic bias field were changing from 3600 to 5300 m/s.

14

Genetic diversity of perch populations in three lowland reservoirs (Central Poland): perspectives for fish sustainable management

32%

Mankiewicz-Boczek J. , Imsiridou A. , Kaczkowski Z. , Tsiora A. , Karaiskou N. , Łapińska M. , Minos G. , Zalewski W.

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tom Vol. 61, nr 2

385--390

EN

Proper multidimensional management of perch, common and one of the most abundant species in European freshwaters, is a challenge both from ecological and commercial perspective. However, all activity relating to the management of the perch must be based on good genetic knowledge in order to ensure a purity of species and further conservation of biodiversity. Therefore, in the present study, the mtDNA cytb and D–loop restriction analysis was applied in order to estimate genetic diversity within and among three perch (Perca fluviatilis L.) populations in reservoirs of Central Poland: Sulejów, Próba and Jeziorsko. Two out of nine, and two out of eight restriction enzymes were polymorphic for cytb and D–loop, respectively. Five different haplotypes were detected with the simultaneous occurrence of haplotype 1 in all three populations. Nucleotide diversity values within investigated populations were low (0.003 to 0.02). No significant differentiation (P = 0.248) among populations representing two different catchments of Pilica and Vistula rivers, was observed. The lack of genetic differentiation of perch populations is the first important element for the development of a strategy to regulate the perch in Polish river systems, with simultaneous reduction of fish in eutrophic reservoirs and increase in amount of perch, in sites favorable for fishing and aquaculture.

15

Ultrasound Velocities in Fe64Ni10Nb3Cu1Si13B9 Alloy

32%

Kaczkowski Z. , Barandiaran J. , Gutierrez J. , Vlasak G. , Svec P. , Duhaj P. , Milewska E. , Krzyżewski A. , Danis E.

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2002

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tom Vol. 23

201-212

EN

The ultrasound velocities at constant magnetic filed (cH) and at constant induction (cB), in the 50 mm long strips cut from the Fe64Ni10Nb3Cu1Si13B9 alloy ribbon were measured is as-quenched state and after annealing hot 1h in vacuu, from 100??? C to 550??? C. These velocities were changing from 3200 to 5320 m/s depending on the heat-treatment and magnetic bias field.

16

Genetic diversity of perch populations in three lowland reservoirs (Central Poland): perspectives for fish sustainable management

32%

Mankiewicz-Boczek J. , Imsiridou A. , Kaczkowski Z. , Tsiora A. , Karaiskou N. , Lapinska M. , Minos G. , Zalewski M.

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tom 61

|

nr 2

EN

Proper multidimensional management of perch, common and one of the most abundant species in European freshwaters, is a challenge both from ecological and commercial perspective. However, all activity relating to the management of the perch must be based on good genetic knowledge in order to ensure a purity of species and further conservation of biodiversity. Therefore, in the present study, the mtDNA cytb and D–loop restriction analysis was applied in order to estimate genetic diversity within and among three perch (Perca fluviatilis L.) populations in reservoirs of Central Poland: Sulejów, Próba and Jeziorsko. Two out of nine, and two out of eight restriction enzymes were polymorphic for cytb and D–loop, respectively. Five different haplotypes were detected with the simultaneous occurrence of haplotype 1 in all three populations. Nucleotide diversity values within investigated populations were low (0.003 to 0.02). No significant differentiation (P = 0.248) among populations representing two different catchments of Pilica and Vistula rivers, was observed. The lack of genetic differentiation of perch populations is the first important element for the development of a strategy to regulate the perch in Polish river systems, with simultaneous reduction of fish in eutrophic reservoirs and increase in amount of perch, in sites favorable for fishing and aquaculture.

17

Ecohydrological system solutions to enhance ecosystem services: the Pilica River Demonstration Project

26%

Wagner I. , Izydorczyk K. , Kiedrzynska E. , Mankiewicz-Boczek J. , Jurczak T. , Bednarek A. , Wojtal-Frankiewicz A. , Frankiewicz P. , Ratajski S. , Kaczkowski Z. , Zalewski M.

International Journal of Ecohydrology and Hydrobiology

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2009

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tom 09

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nr 1

EN

The application of ecohydrology principles as part of Integrated Water Resources Management (IWRM) has the potential to enhance the resilience of a catchment to anthropogenic impacts. Linking this approach with an understanding of water users and social and economic conditions in a given region, provides a foundation for the development of system solutions. Improving the quality of the environment, and the ecosystem services provided, can be a driver of new employment opportunities that contribute to both the overall economy of a region and sustainability. With these goals in mind, the paper presents a four-step approach for implementation of ecohydrology principles in IWRM, including a) monitoring of threats, b) analysis of the cause-effect relationships, c) development of methods, and d) system solutions. This approach was formulated and tested within a UNESCO-IHP and UNEP-IETC Demonstration Project on the Pilica River in Poland. This project aims to support fulfilment of Poland's obligations Resulting form the EU Water Framework Directive and other European directives, and constitutional obligations for sustainable development. Attempts to transfer lessons learned to other catchments and socio-ecological systems (such as urban catchments) are highlighted.