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Tytuł:
Determination of displacements of slender objects
Wyznaczenie przemieszczeń obiektów wysmukłych
Autorzy:
Grzeja, O. Z.
Mąkolski, K.
Powiązania:
https://bibliotekanauki.pl/articles/972122.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Przyrodniczy we Wrocławiu
Tematy:
deformation measurements
reflectorless measurement
slender objects
thermal loads
wind loads
pomiar deformacji
pomiar bezlustrowy
obiekt wysmukły
obciążenia termiczne
obciążenie wiatrem
Opis:
In the paper the authors conducted a study on the determination of daily changes in the position of a slender object on example of a power pole. The size of the dynamic de- flections was compared to variables of the effect of solar radiation and the wind speed and direction measured during research. To determine these parameters to-date measurements of temperatures on sunny and sheltered side of construction, direction and wind strength were performed. The attempt was made to determine the static deflection in order to compare them to the size of the maximum set forth in the technical standards. The measurement accuracy of the controlled points of the object was compared with values given in the technical instructions. The authors concluded that deformation measurements carried out in serve weather conditions gave more valuable information in terms of an object endurance. The research is the first step in lengthier measurements. The motivation for this paper is need of rebuild of electric high – voltage lines.
W artykule autorzy przedstawili badania dotyczące wyznaczania dobowych wychyleń obiektów wysmukłych zrealizowanych na przykładzie zmian położenia słupa energetycznego. Wielkości wychyleń dynamicznych odnieśli do pomierzonych w czasie trwania pomiarów zmiennych wartości wpływu nasłonecznienia oraz wpływu prędkości i kierunku wiatru. Podjęli też próbę wyznaczenia wychyleń statycznych w celu ich porównania z wielkościami maksymalnymi przedstawionymi w obowiązujących normach prawnych. Do przepisów zawartych w tych normach odnieśli również uzyskane w wyniku pomiarów dokładności określenia punktów kontrolowanych badanego obiektu. Autorzy doszli do wniosku, że pomiary odkształceń przeprowadzonych w ciężkich warunkach pogodowych dają więcej przydatnych informacji o wytrzymałości obiektu. Badanie jest pierwszym krokiem w ciągu dłuższych pomiarów. Motywacją do napisania tego artykułu jest potrzeba przebudowy linii elektrycznych wysokiego napięcia.
Źródło:
Acta Scientiarum Polonorum. Geodesia et Descriptio Terrarum; 2015, 14, 1-2; 35-45
1644-0668
Pojawia się w:
Acta Scientiarum Polonorum. Geodesia et Descriptio Terrarum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of glue used for the purpose of sticking plastics on the base of Cyklopol process waste fraction
Autorzy:
Vogt, O.Z.
Vogt, E.L.
Charyasz, W.J.
Powiązania:
https://bibliotekanauki.pl/articles/779392.pdf
Data publikacji:
2009
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Cyklopol
odpadowa frakcja alkoholowa
klej
waste alcohol fraction
glue for plastic
Opis:
The utilization of monohydric alcohols waste fraction from the Cyklopol process was studied. On the basis of this fraction the solvent, which mainly contains acetic acid esters, was synthesized. Tests of the application of the obtained solvent as a base of glue for plastics were carried out and it was found out that it could be used to stick PMMA together. In the case of PS, PET, PC or PVC slightly weaker sticking properties of this solvent also occurred. The glue joint characteristics in the case of PMMA were similar to those obtained for the glue joints that were made with the use of the commercially available glue used for this plastic. The additional advantage of our glue is its nice fruity smell. The obtained results enable us to establish the possibility of waste alcohol fraction management as a raw material for the production of glue for plastic. The esterification method proposed in the work can be a good way of management of waste alcohol fractions naturally occurring during cyclohexanone production.
Źródło:
Polish Journal of Chemical Technology; 2009, 11, 1; 55-60
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measuring wind gradients in agroforestry systems by shaded piche evaporimeters. II. Accuracies obtained in some African case studies
Autorzy:
Stigter, C J
Kainkwa, R.M.R.
Oteng'i, S.B.B.
Onyewotu, L.O.Z.
Mohammed, A.E.
Ibrahim, A.A.
Rashidi, M.G.M.
Powiązania:
https://bibliotekanauki.pl/articles/26193.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
anemometry
Piche evaporimeter
wind reduction
agroforest system
Źródło:
International Agrophysics; 2000, 14, 4
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sorption and migration of Cs, Sr, and Eu in gypsum - groundwater system
Autorzy:
Alhassanieh, O.
Mrad, O.
Ajji, Z.
Powiązania:
https://bibliotekanauki.pl/articles/147892.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
distribution
cesium
europium
strontium
gypsum
groundwater
Opis:
The distribution of 137Cs, 152Eu, and 85Sr in a solid/aqueous system, gypsum in contact with groundwater, was investigated using gamma-spectrometry. The sorption and migration of the radionuclides were investigated. The aqueous phase was characterized using instrumental neutron activation analysis (INAA) and high performance liquid chromatography (HPLC). The solid phases were characterized using X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The investigations included three kinds of gypsum: mineral, commercial, and own prepared gypsum. The influence of some parameters on sorption/migration of the radionuclides were studied, such as contact time, pH, and concentrations of concurrent elements. The effect of element concentration was also investigated. The results show the ability of gypsum to keep Sr and Eu in the solid phase in all three cases. The incorporation of Cs in the solid phase depends on the conditions and used materials, and varies between 93 and 97%.
Źródło:
Nukleonika; 2012, 57, 1; 125-131
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy metal content of sewage sludge in the Warmian-Mazurian province
Zawartość metali ciężkich w osadach ściekowych województwa Warmińsko-Mazurskiego
Autorzy:
Mazur, Z.
Mokra, O.
Powiązania:
https://bibliotekanauki.pl/articles/388629.pdf
Data publikacji:
2013
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
sewage sludge
organic mater
heavy metals
osady ściekowe
materia organiczna
metale ciężkie
Opis:
The work presents the results of physico-chemical studies on municipal sewage sludge from water treatment plants in the Warmian-Masurian province during the years 2005–2009. Dry mass and organic matter content and pH were determined in the samples. Heavy metals (cadmium, chromium, copper, nickel, lead, zinc, and mercury) were assessed by means of flame atomic absorption spectroscopy (FAAS) following mineralization in a microwave system. Dry matter content in the analyzed sewage sludge ranged from 18.1 % to 27.9 %, with the organic matter content in dry mass between 57.2 % and 69.9 %. Large differences in the average content of heavy metals were noted between the individual study years. Differences under 100 % were characteristic of Ni, Pb, Zn and Hg, and above 100 % of Cu, Cr and Cd. The differences between the minimal and maximal content ranged from 38 % to 205 % in relation to the average values in the study years. Among the analyzed microelements, Zn and Cu (included in the group of microelements applied in agriculture) were most prevalent The remaining heavy metals occurred in amounts lower than those specified by the acceptable norms for application in agriculture.
W pracy podano wyniki fizykochemicznych badań komunalnych osadów ściekowych z oczyszczalni ścieków województwa warmińsko-mazurskiego w latach 2005–2009. W próbkach osadów oznaczono zawartość suchej masy, pH i zawartość materii organicznej. Metale ciężkie (kadm, chrom, miedź, nikiel, ołów, cynk i rtęć) oznaczono metodą płomieniowej absorpcyjnej spektroskopii atomowej po wcześniejszej mineralizacji w systemie mikrofalowym. Zawartość suchej masy w badanych komunalnych osadach ściekowych wynosiła od 18,1 do 27,9 %, a zawartość materii organicznej w suchej masie wynosiła od 57,2 do 69,9 %. Stwierdzono duże różnice w średniej zawartości metali ciężkich między latami badań. Różnice poniżej 100 % dotyczą Ni, Pb, Zn i Hg, natomiast powyżej 100 % Cu, Cr i Cd. Natomiast wahania między minimalną a maksymalną zawartością zawierają się w granicach od 38 do 205 % w stosunku do wartości średnich w latach badań. Spośród badanych mikroskładników najwięcej przypadało na Zn i Cu (pierwiastki zaliczane do mikroelementów stosowanych w rolnictwie). Pozostałe metale ciężkie występowały w ilości mniejszej niż określają normy dopuszczalne ich stosowania w rolnictwie.
Źródło:
Ecological Chemistry and Engineering. A; 2013, 20, 4-5; 515-523
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of computer vision and image analysis technics
Autorzy:
Rybchak, Z.
Basystiuk, O.
Powiązania:
https://bibliotekanauki.pl/articles/411187.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
computer vision
image recognition
object recognition
machine learning
computer with high-level understanding
digital images processing
scene reconstruction
wizja komputerowa
rozpoznawanie obrazów
rozpoznawanie obiektów
systemy uczące się
cyfrowe przetwarzanie obrazów
Opis:
Computer vision and image recognition are one of the most popular theme nowadays. Moreover, this technology developing really fast, so filed of usage increased. The main aims of this article are explain basic principles of this field and overview some interesting technologies that nowadays are widely used in computer vision and image recognition.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2017, 6, 2; 79-84
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Towards sustainable transport in Ukraine: main obstacles and directions of development
Autorzy:
Dvulit, Z.
Bojko, O.
Powiązania:
https://bibliotekanauki.pl/articles/411365.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
Ukraine
sustainable development
transport
sustainability
transport strategy
Opis:
The paper presents the description of the different definitions of the concept - sustainable development of transport. The analysis of freight and passenger transportation in Ukraine in 2011 and composition of the park and the average age of municipal electric, sea and river vessels is studied. The volume of emissions of pollutants and greenhouse gas emissions from All transport modes in 2011 is analyzed. The framework and priorities of environmental cooperation between Ukraine and EU at the present stage are determined. Based on the concept of sustainable development and European experience the main directions of introduction of the sustainable development Policy of transport in Ukraine are offered.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2014, 3, 2; 7-14
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Processes of running sands decay in the Bledow Desert during the last 30 years [Silesian Upland, South Poland]
Autorzy:
Rahmonow, O
Snieszko, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1450596.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
Silesian Upland
history
Polska
primary succession
fossil soil
physical geography
pine wood
Bledowska Desert
secondary succession
soil
sandy substratum
climatic parameter
terrestrial ecosystem
Opis:
The Błędów Desert is situated in the south of Poland. In this area, sand-gravel sediments predominate. The origin of the Błędów Desert is not associated with climatic conditions but with a strong development of excavation industry which started in the region in the Middle Ages. The surrounding forests became the main fuel source for the development of mining and metallurgical industry. Therefore, the area of the Błędów Desert was completely deforested. The paper presents reasons for the acceleration of biocenotical systems in the investigation area. For this purpose, transects representative for the following stages of plants successions: stage of encroachment plants, stage of sodding, stage of bushes (shrubs), stage of biogroup and stage of afforestation were made. Plant succession in the investigated transects developed in a multidirectional way. The ground for plants settling in the Błędów Desert represents fluvoiglacial, fluvial and aeolian sand with various grain sizes. Locally, in the old deflation fields, relict horizons of older podzolic and rust-coloured soil are the ground for the invading plants. The process of plant and soil succession takes place at the same time. Content of the available mineral elements in the initial horizons is different; it depends on the plant species in the places where these horizons developed.
Źródło:
Acta Agrophysica; 2001, 50; 197-205
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improving security of lightweith SHA-3 against preimage attacks
Autorzy:
Serhii, O.
Kotulski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/227343.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hash function
SHA-3
Keccak
preimage attack
lightweight cryptography
Opis:
In this article we describe the SHA-3 algorithm and its internal permutation in which potential weaknesses are hidden. The hash algorithm can be used for different purposes, such as pseudo-random bit sequences generator, key wrapping or one pass authentication, especially in weak devices (WSN, IoT, etc.). Analysis of the function showed that successful preimage attacks are possible for low round hashes, protection from which only works with increasing the number of rounds inside the function. When the hash function is used for building lightweight applications, it is necessary to apply a small number of rounds, which requires additional security measures. This article proposes a variant improved hash function protecting against preimage attacks, which occur on SHA-3. We suggest using an additional external randomness sources obtained from a lightweight PRNG or from application of the source data permutation.
Źródło:
International Journal of Electronics and Telecommunications; 2018, 64, 2; 159-166
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new magnetic anomaly map of Poland and its contribution to the recognition of crystalline basement rocks
Autorzy:
Petecki, Z.
Rosowiecka, O.
Powiązania:
https://bibliotekanauki.pl/articles/2060591.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
magnetometry
Earth’s total magnetic field map
pseudogravity
crystalline basement
Polska
Opis:
Magnetic total field measurements acquired in Poland between 1974 and 2011 have been compiled in a new digital database that provides a complete picture of magnetic anomalies of the country. The data compilation and further processing procedures used to create the magnetic anomaly database and maps that accompany this article are briefly summarized. The reduced-to-the-pole and pseudogravity anomaly maps were computed to accurately locate anomalies above their causative bodies as well as to simplify anomaly patterns and emphasize principal magnetic domains within the basement. An interpretation of the magnetic maps reveals a lot of magnetic basement provinces and domains indicating basement division into blocks and structural elements, which are important for understanding the regional tectonic setting of Poland.
Źródło:
Geological Quarterly; 2017, 61, 4; 934--945
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rotary friction welding of weight heavy alloy with wrought AlMg3 alloy for subcaliber ammunition
Autorzy:
Goroch, O.
Gulbinowicz, Z.
Powiązania:
https://bibliotekanauki.pl/articles/101922.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
friction welding
weight heavy alloy
sub-caliber ammunition
Opis:
The results of studies concerning friction welding of Weight Heavy Alloy (WHA) with AlMg3 alloy are presented. The friction welding of density 17.5 Mg/m3 with aluminum alloy showed that it is possible to reach the joints with the strength exceeding the yield strength of wrought AlMg3 alloy. This strength looks to be promising from point of view of condition which have to be fulfilled in case of armor subcaliber ammunition, where WHA rods play the role Kinetic Energy Penetrators and aluminum is used for projectile ballistic cup.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 4; 111-122
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neural network simulation in running of acetic acid synthesis unit while start-up
Nejjroetevoe modelirovanie dlja upravlenija kolonnojj sinteza uksusnojj kisloty v period puska
Autorzy:
Porkuian, O.
Samojlova, Z.
Powiązania:
https://bibliotekanauki.pl/articles/792304.pdf
Data publikacji:
2013
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
neural network
artificial neural network
automated control system
acetic acid
MATLAB software
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2013, 13, 3
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of foliar potassium and calcium applications on the nutrient status, fruit quality and yield of apple tree varieties
Autorzy:
Sürücü, O.
Küçükyumuk, Z.
Powiązania:
https://bibliotekanauki.pl/articles/54102421.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
In this study, foliar potassium and calcium fertilizers were applied singly and combined to two different apple tree varieties in order to evaluate the effects of potassium and calcium fertilizers on yield, quality and nutrient levels and to recommend fertilization. For this purpose, the Red Chief and Golden Delicious varieties were used. Leaf analyses (N, P, K, Ca, Mg, Fe, Cu, Zn, Mn), the SPAD measurement, pomological analyses (fruit weight, width, length, skin color, flesh firmness), and yield were made. Differences in nitrogen and phosphorus between the varieties and applications were found to be insiginificant, while Golden Delicious was found to be significantly richer than Red Chief in the content of K, Ca and Mg. According to the values obtained, all the micronutrients except Fe were taken up in greater amounts by Red Chief than by Golden Delicious. Differences between the cultivars in the width, height and weight of fruits were significant, but the differences in the same parameters due to the tested applications were found to be insignificant. When examined in terms of firmness, the difference between the varieties was insignificant, and the difference between the applications was significant, as Golden Delicious achieved higher values than Red Chief. In terms of the leaf SPAD value, Red Chief scored higher than Golden Delicious. Using an appropriate fertilizer for a given variety is important for increasing yield, quality and nutrient concentration when potassium and calcium fertilizers are applied separately or together in similar climatic and soil conditions. In this study, the yield was increased by applying K and Ca separately or together. Among the quality parameters, it was determined that the K+Ca application was more effective than separate applications of K and Ca in terms of fruit firmness. Although there is sufficient potassium and calcium in the soil, 1% Ca + 1% K application to the apple tree leaves can increase fruit quality and yield. The results will be useful for future studies.
Źródło:
Journal of Elementology; 2023, 28, 1; 173-187
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pseudothurmanniid ammonites from quarries near Lietavská Lúčka and their stratigraphical significance (Late Hauterivian, Central Western Carpathians, Slovakia)
Autorzy:
Vašiček, Z.
Malek, O.
Powiązania:
https://bibliotekanauki.pl/articles/2060607.pdf
Data publikacji:
2017
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
ammonites
taxonomy
stratigraphy
Hauterivian
Western Carpathians
Opis:
Pseudothurmanniid ammonites within Upper Hauterivian calcareous deposits are present in quarries on Polomec Hill near the village of Lietavská Lúčka, Slovakia. These deposits belong to the Mráznica Formation of the Krížna Nappe that is a part of the Fatricum Unit in the Central Western Carpathians. Nine ammonite species are described in detail, one of which, Binellicerasmichalíki, is new. The species identified indicate the Upper Hauterivian Balearis and Ohmi ammonite zones. The zone of the uppermost Hauterivian, Catulloi Zone, is not documented as far as pseudothurmanniid ammonites are concerned. The lackof developmentally younger representatives of the pseudothurmanniid ammonites neitherin the studied locali ty, nor in other Slovak locali ties, is explained by marked changes in the northern Tethyan margin in Europe duri ng the latest Hauterivian.
Źródło:
Geological Quarterly; 2017, 61, 3; 613--631
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electric Dipole Moments of Acetone and of Acetic Acid Measured in Supersonic Expansion
Autorzy:
Dorosh, O.
Kisiel, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1814018.pdf
Data publikacji:
2007-12
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
31.15.Ar
32.10.Dk
32.30.Bv
32.60.+i
33.15.Kr
33.1.Mt
33.20.Bx
33.20.Sn
Opis:
Precise values for electric dipole moments of isolated acetone and acetic acid molecules were determined from the Stark effect measurements made on lowest J rotational transitions at conditions of supersonic expansion. The new results are $μ_{tot} =μ_b$ =2.9345(22) D for acetone from measurements on the $1_{11}$← $1_{01}$ transition, and $μ_a$ =0.8631(8), $μ_b$ =1.4345(11), $μ_{tot}$ =1.6741(10) D for acetic acid, from measurements on $1_{11}$ ← $0_{00}$ and $1_{01}$ ← $0_{00}$ transitions. A comparison with previous determinations and with results of quantum chemical calculations is presented.
Źródło:
Acta Physica Polonica A; 2007, 112, S; S-95-S-104
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł

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