Wyniki wyszukiwania

1

Oddzialywanie wstrzasow gorniczych na budynki z uwzglednieniem losowosci zjawiska

100%

Kowalski W.

Zeszyty Naukowe Akademii Rolniczej w Krakowie. Inżynieria Środowiska

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2005

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tom 26

483-499

2

Archiwalna kolekcja rycin z badań fykologicznych prowadzonych w okresie międzywojennym w Zakładzie Systematyki i Geografii Roślin Uniwersytetu Warszawskiego

100%

Kowalski W.

Wiadomości Botaniczne

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2017

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tom 61

3

Polowanie po szwedzku

100%

Kowalski W.

Zachodni Poradnik Łowiecki. Kwartalnik Wojewódzkiego Sejmiku Łowieckiego w Poznaniu

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2007-2008

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nr 4[24]

4

Trudne życie rzepaku

100%

Kowalski W.

Rada: Rolnictwo, Aktualności, Doradztwo, Analizy. Miesięcznik Wojewódzkiego Ośrodka Doradztwa Rolniczego w Bratoszewicach

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2012

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nr 02

5

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Investigations on tensile load-carrying ability of reed stems

100%

Kowalski W.

Acta Scientiarum Polonorum. Architectura

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2016

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tom 15

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nr 4

The investigations on mechanical properties of reed stems face numerous difficulties, because of their anisotropy, heterogeneity, shell-like structure, small lateral dimensions of stems and huge diversity of species and habitats of origination. Aware of all difficulties to cope with, the basic experiment has been conducted, that is the uni-axial tension test for reed stems, with- and without joints. The strain-stress relation, at tension, displayed an exponential character, showing material stiffening with the growth of strain. Test results incline to conclusion, that stem-pieces without joints are equally stiff as pieces with joints, however, they are twice as strong as the latter. It means, that joints can be perceived as fragile (in the sense: “brittle”) discontinuity in structure of reed stems. The results of the test have been put through critical estimate and analysis tending to statistical modelling of the load-carrying ability of reed stems.

6

Physical and mathematical ponderability of temperature measurement's frequency in environmental engineering

100%

Kowalski W.

Acta Scientiarum Polonorum. Formatio Circumiectus

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2014

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tom 13

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nr 2

The paper discusses circumstances that lead to improper measurements of temperature: without appropriate consideration to the context of physical phenomena occurring in nature or without appropriate awareness of mathematical principles; all of which results in data misinterpretation. Based on the conducted discussion, it can be stated that measurements and analyses of thermal phenomena, which are time-varying processes, should be performed using the same principles and tools as in the identification of dynamic processes, such as the Nyquist theorem.

7

Pozyskiwanie energii ze zboża. Sposób na alternatywne zagospodarowanie nadprodukcji

100%

Kowalski W.

Rada: Rolnictwo, Aktualności, Doradztwo, Analizy. Miesięcznik Wojewódzkiego Ośrodka Doradztwa Rolniczego w Bratoszewicach

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2010

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nr 01

8

Uprawiajmy rosliny straczkowe na pasze dla trzody chlewnej

100%

Kowalski W.

Rada: Rolnictwo, Aktualności, Doradztwo, Analizy. Miesięcznik Wojewódzkiego Ośrodka Doradztwa Rolniczego w Bratoszewicach

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2003

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nr 10

11-12

9

On mean temperature in climatologic and agronomic studies

100%

Kowalski W.

Acta Scientiarum Polonorum. Formatio Circumiectus

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2014

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tom 13

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nr 2

The paper discusses various methods of determining mean temperature in climate studies and the consequences of applying particular methods. The conclusion is that the use of various mathematical formulas that describe mean temperature usually yields different results. In some cases, the differences can reach ten to twenty percent. Consequently, the results of different analyses are incomparable, even in engineering, and especially in research and scientific studies. Hence the postulate to avoid conducting comparative analyses with the use of data from different authors, if their temperature definitions are different, or if there is no precise information on the formulas used in the calculation.

10

Nasi mali sprzymierzeńcy (cz.II)

100%

Kowalski W.

Rada: Rolnictwo, Aktualności, Doradztwo, Analizy. Miesięcznik Wojewódzkiego Ośrodka Doradztwa Rolniczego w Bratoszewicach

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2014

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nr 04

11

Nasi mali sprzymierzeńcy (cz.I)

100%

Kowalski W.

Rada: Rolnictwo, Aktualności, Doradztwo, Analizy. Miesięcznik Wojewódzkiego Ośrodka Doradztwa Rolniczego w Bratoszewicach

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2014

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nr 02

12

Nasza gmina Zychlin

75%

Kowalski W.

INO. Informacje, Nowości, Oferty. Ośrodek Doradztwa Rolniczego w Płocku

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1998

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nr 01

17

13

Wplyw procesu wykonczania skor na skutecznosc maskowania wystepujacych uszkodzen i wad

63%

Zapletal P., Kowalski W.

Przegląd Skórzany

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1996

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tom 51

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nr 09

293-294

14

Stan i zagrożenia populacji Luronium natans (L.) Rafin w Jeziorze Orzechowskim koło Nowogardu

63%

Kowalski W., Piotrowska J.

Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica

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2011

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tom 19

15

Natural vibrations of a tower structure in mass-changing conditions due to the icing

63%

Kowalski W., Swierczek E.

Acta Scientiarum Polonorum. Architectura

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2016

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tom 15

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nr 2

The study analyzed the impact of additional tower structure masses on the change of the frequency of its natural vibrations; it also made attempts to mathematical description of this impact. Considerations apply to the tower supporting the lighting system of the city stadium in Ostrowiec Świętokrzyski. The source of additional masses is the icing (frost, rime) and non-structural components constituting the technical equipment of the tower. The analysis was made by modeling by means of the Finite Element Method (FEM) of the structure with the assumption of a one parameter variation of its mass (i.e., the additional mass of all components, structural and non-structural, changes in proportion to one parameter, which is the outer surface of the element on which the ice layer is deposited). Solving the problem of natural vibrations, for subsequent models, representing different intensity of tower's icing, the following natural frequencies have been established. Thus, the increase of the ice-layer thickness on the surfaces from 0 to 2.4 cm caused the reduction of basic natural frequencies by a value, consecutively: for f1 → 26.9%; for f → 27.2%. These values are important from the point of view of technical applications. The findings allow to formulate a postulate that, in the analysis of tower's structure susceptibility to gusts of wind, structure's mass variability resulting from its possible icing was taken into consideration.

16

Nowe stanowiska Alisma lanceolatum With. [Alismataceae] i Zannichellia palustris L. [Potamogetonaceae] na Pojezierzu Zachodniopomorskim

63%

Kowalski W., Banas U.

Folia Universitatis Agriculturae Stetinensis. Agricultura

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2000

|

tom 85

189-192

17

Czy nalezy eliminowac wchodzenie na drzewa w kolcach?

63%

Kowalski W., Pruchniewicz J.

Przegląd Leśniczy

|

2002

|

tom 12

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nr 09

11

18

Przebieg aklimatyzacji do zimna w Antarktyce

63%

Kowalski W., Kwarecki K.

Acta Physiologica Polonica

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1985

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tom 36

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nr Supl.28[5-6]

19

Nowe stanowisko Elatine alsinastrum L. [Elatinaceae] z terenu Pojezierza Mysliborskiego

63%

Kowalski W., Friedrich S.

Folia Universitatis Agriculturae Stetinensis. Agricultura

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2000

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tom 85

185-188

20

Biotransformation of phosphogypsum in petroleum-refining wastewaters

63%

Wolicka D., Kowalski W.

Polish Journal of Environmental Studies

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2006

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tom 15

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nr 2

Eleven isolates of sulphate-reducing bacteria (SRB) were isolated from soil contaminated with crude oil derivatives and petroleum-refining wastewaters and used to investigate the effectiveness of carbon reduction and biotransformation of phosphogypsum. One of the isolates (culture no. 10) was found to be very effective with 90% carbon reduction (measured as COD) and the simultaneous biotransformation of approximately 2.65g phosphogypsum/L in industrial petroleum-refining wastewaters.

Ograniczanie wyników

Oddzialywanie wstrzasow gorniczych na budynki z uwzglednieniem losowosci zjawiska

Archiwalna kolekcja rycin z badań fykologicznych prowadzonych w okresie międzywojennym w Zakładzie Systematyki i Geografii Roślin Uniwersytetu Warszawskiego

Polowanie po szwedzku

Trudne życie rzepaku

Investigations on tensile load-carrying ability of reed stems

Physical and mathematical ponderability of temperature measurement's frequency in environmental engineering

Pozyskiwanie energii ze zboża. Sposób na alternatywne zagospodarowanie nadprodukcji

Uprawiajmy rosliny straczkowe na pasze dla trzody chlewnej

On mean temperature in climatologic and agronomic studies

Nasi mali sprzymierzeńcy (cz.II)

Nasi mali sprzymierzeńcy (cz.I)

Nasza gmina Zychlin

Wplyw procesu wykonczania skor na skutecznosc maskowania wystepujacych uszkodzen i wad

Stan i zagrożenia populacji Luronium natans (L.) Rafin w Jeziorze Orzechowskim koło Nowogardu

Natural vibrations of a tower structure in mass-changing conditions due to the icing

Nowe stanowiska Alisma lanceolatum With. [Alismataceae] i Zannichellia palustris L. [Potamogetonaceae] na Pojezierzu Zachodniopomorskim

Czy nalezy eliminowac wchodzenie na drzewa w kolcach?

Przebieg aklimatyzacji do zimna w Antarktyce

Nowe stanowisko Elatine alsinastrum L. [Elatinaceae] z terenu Pojezierza Mysliborskiego

Biotransformation of phosphogypsum in petroleum-refining wastewaters