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Wyszukujesz frazę "Makuch, M." wg kryterium: Autor


Tytuł:
Application of classical land surveying measurement methods for determining the vertical displacement of railway bridges
Zastosowanie klasycznych metod geodezyjnych do wyznaczania przemieszczeń pionowych belek dźwigara mostu kolejowego
Autorzy:
Gawronek, P.
Makuch, M.
Powiązania:
https://bibliotekanauki.pl/articles/396112.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
determination of displacements
displacement of structure
deformation of structure
precise leveling
trigonometric leveling
steel railway bridge
wyznaczanie przemieszczeń
przemieszczenia obiektu
odkształcenia obiektu
niwelacja precyzyjna
niwelacja trygonometryczna
stalowy most kolejowy
metody geodezyjne
Opis:
The classical measurements of stability of railway bridge, in the context of determining the vertical displacements of the object, consisted on precise leveling of girders and trigonometric leveling of controlled points (fixed into girders' surface). The construction elements, which were measured in two ways, in real terms belonged to the same vertical planes. Altitude measurements of construction were carried out during periodic structural stability tests and during static load tests of bridge by train. The specificity of displacement measurements, the type of measured object and the rail land surveying measurement conditions were determinants to define methodology of altitude measurement. The article presents compatibility of vertical displacements of steel railway bridge, which were developed in two measurement methods. In conclusion, the authors proposed the optimum concept of determining the vertical displacements of girders by using precise and trigonometric leveling (in terms of accuracy, safety and economy of measurement).
Pomiary klasyczne stabilności mostu kolejowego, w kontekście wyznaczania przemieszczeń pionowych dolnych belek konstrukcyjnych obiektu, polegały na niwelacji precyzyjnej wpustów dźwigarów oraz niwelacji trygonometrycznej punktów kontrolowanych, zamocowanych do konstrukcji mostu w płaszczyznach pionowych niwelowanych wypustów. Pomiary wysokościowe metodami klasycznymi realizowano podczas okresowego badania stabilności konstrukcji oraz podczas próbnych obciążeń statycznych mostu taborem kolejowym. Specyfika pomiarów przemieszczeń, rodzaju obiektu podlegającego pomiarowi oraz warunków pracy w geodezji kolejowej zobligowała do zdefiniowania metodyk pomiarów wysokościowych, zapewniających pozyskanie danych o zadowalającym stopniu dokładności oraz niezawodności w kontekście badanego zjawiska. W artykule dokonano oceny stopnia zgodności wyznaczonych przemieszczeń pionowych pozyskanych na podstawie precyzyjnej niwelacji geometrycznej oraz niwelacji trygonometrycznej. W podsumowaniu zaproponowano optymalną pod względem dokładności, ekonomii pomiaru oraz bezpieczeństwa koncepcję wyznaczania przemieszczeń pionowych dolnych belek dźwigara mostu kolejowego z zastosowaniem metody klasycznej.
Źródło:
Civil and Environmental Engineering Reports; 2017, No. 27(4); 169-183
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Employee Direct Participation in Organisational Decisions and Workplace Safety
Autorzy:
Widerszal-Bazyl, M.
Warszewska-Makuch, M
Powiązania:
https://bibliotekanauki.pl/articles/90170.pdf
Data publikacji:
2008
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
direct participation
safety
accidents
sickness absence
Opis:
Managers from 192 companies filled out the Employee Direct Participation in Organisational Change questionnaire measuring employees’ direct participation (DP) in organisational decisions. Four main forms of DP were identified: individual and group consultations, and individual and group delegation. Workplace safety was measured with the number of accidents, the number of employees working in hazardous conditions, accident absenteeism and sickness absence. Results showed that the 2 latter indicators were significantly related to some parameters of DP. Thus, companies that used face-to-face individual consultation had lower accident absenteeism than ones that did not. The same effect was true for group consultation with temporary groups, and individual and group delegation. Workplaces with high scores for scope for group consultation had lower accident absenteeism, and those with high scores for scope for group delegation had lower sickness absence. It was concluded that employee DP had a positive influence on workplace safety, even if involvement was not directly related to safety.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2008, 14, 4; 367--378
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Work Time Control and Mental Health of Workers Working Long Hours: The Role of Gender and Age
Autorzy:
Żołnierczyk-Zreda, D.
Bedyńska, S.
Warszewska-Makuch, M.
Powiązania:
https://bibliotekanauki.pl/articles/89996.pdf
Data publikacji:
2012
Wydawca:
Centralny Instytut Ochrony Pracy
Tematy:
long working hours
work time control
somatic complaints
anxiety
social dysfunction
depression
Opis:
The aim of this study was to examine the relationship between work time control and mental health in workers working long hours. The study also attempted to show how that relationship depended on age and gender. Three hundred and six white-collar workers doing clerical work for over 8 h daily were diagnosed on work time control and mental health with the 28-item General Health Questionnaire. The results of an analysis of variance (ANOVA) showed that participants working long hours but having high control over their work time had a significantly higher level of their mental health with regard to somatic complaints and anxiety and marginally higher with regard to social dysfunction than workers with low control over their work time. Male and female workers reported different problems with their mental health depending on what age (stage of life) they were at. It is hypothesized that the work–family conflict, inability to fulfil social commitments and poor working conditions can influence those effects.
Źródło:
International Journal of Occupational Safety and Ergonomics; 2012, 18, 3; 311-320
1080-3548
Pojawia się w:
International Journal of Occupational Safety and Ergonomics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
DPPH radical scavenging activity and phenolic compound content in different leaf extracts from selected blackberry species
Autorzy:
Gawron-Gzella, A.
Dudek-Makuch, M.
Matlawska, I.
Powiązania:
https://bibliotekanauki.pl/articles/19626.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
We used DPPH scavenging assays to study the antioxidant activity of three native Polish species of blackberry leaves (Rubus kuleszae Ziel., R. fabrimontanus (Sprib.) Sprib. and R. capitulatus Utsch.). All the studied extracts (methanolic, water, methanolic-water) showed high DPPH free radical scavenging activity (IC50 450.0–186.0 μg/ml). The most effective of the studied species was Rubus kuleszae. Total content of phenolic compounds (70.50–136.04 mg GAE/g) and phenolic acids (14.70–38.26 mg CAE/g) was determined spectrophotometrically. Antioxidant activity correlated positively with total content of phenolic compounds and phenolic acids.
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2012, 54, 2
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The relationship between COPD Assessment Test (CAT) scores and Distress Thermometer (DT) results in COPD patients
Autorzy:
Makuch, M.
Milanowska, J.
Michnar, M.
Samardakiewicz, M.
Milanowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/28762984.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Źródło:
Annals of Agricultural and Environmental Medicine; 2020, 27, 4; 689-694
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Human cancellous bone mechanical properties and penetrator geometry in nanoindentation tests
Autorzy:
Makuch, A. M.
Skalski, K. R.
Powiązania:
https://bibliotekanauki.pl/articles/306529.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
właściwości mechaniczne
identacja
kość gąbczasta
moduł Younga
mechanical properties
indentation
cancellous bone
penetrator geometry
Young modulus
Opis:
The goal of the study was to determine the influence of the penetrator geometry on the human cancellous bone mechanical properties in indentation tests. The aim of this research was also the assessment of the material properties of bone structures, having in mind the energy aspects of the curve obtained in the cycle: inelastic loading and elastic unloading. Methods: The samples were resected from a femoral heads of patients qualified for a hip replacement surgery. During the Depth Sensing Indentation tests, hardness and elastic modulus of the cancellous bone tissue were measured using the spherical and Vickers penetrators. Measurements were made in a node and in a trabecula for each sample. Results: The analysis of the measurement results and the calculations of total energy, i.e., elastic and inelastic, and those of the parameters of hardness and elasticity made it possible to assess the influence of the penetrator geometry on the mechanical properties of bone structures at a microscopic level. Conclusions: It was found, with respect to the methodology of indentation, that without determining the shape of the penetrator and the site of the indentation, an objective assessment of the micro mechanical properties of the tested material is not possible.
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 3; 153-164
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Variability of leaf morphology from generative and vegetative shoots of Rubus capitulatus and R. kuleszae (Corylifolii section, Rosaceae)
Autorzy:
Kluza-Wieloch, M.
Maciejewska-Rutkowska, I.
Gawron-Gzella, A.
Dudek-Makuch, M.
Drapikowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/878484.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu
Tematy:
leaf morphology
plant morphology
variability
generative shoot
vegetative shoot
Rubus capitulatus
Rubus kuleszae
Corylifolii section
Rosaceae
bramble
leaf
statistical method
Opis:
Leaves from generative and vegetative shoots of Rubus capitulatus and R. kuleszae of Corylifolii section were investigated. The study was to demonstrate the variability of leaves of both types of shoots, and at the same time an examination on the contents of polyphenols and phenolic acids in their blades carried out. Selected blade traits, such as was: length, width, elongation, perimeter, dissection index, area, rectangularity and circularity were measured using computer program and statistically analysed. Additionally, fresh and dry leaves were weighed and the percentage of preserved mass of particular samples was calculated. A statistical analysis revealed the area to be the most variable feature in both species and both types of shoots. Leaves from vegetative shoots were the most similar to each other and the length, width, perimeter and area were the most strongly correlated traits to each other. The leaves of generative shoots of both species contained less water than the leaves of vegetative ones.
Źródło:
Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana; 2013, 17
1896-1908
Pojawia się w:
Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of the cumulated deformation energy in the measurement by the DSI method on the selected mechanical properties of bone tissues
Autorzy:
Makuch, A. M.
Skalski, K. R.
Pawlikowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/307310.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
indentacja
sprężystość
kość beleczkowa
metoda DSI
indentation
elasticity
trabecular bone
DSI method
energy deformation
Opis:
Purpose: The goal of the study was to determine the influence of DSI test conditions, i.e. loading/ unloading rates, hold time, the value of the maximum loading force on selected mechanical properties of trabecular bone tissue. Methods: The test samples were resected from a femoral head of a patient qualified for a hip replacement surgery. During the DSI tests hardness (HV, HM, HIT) and elastic modulus (EIT) of trabecular bone tissue were measured using the Micro Hardness Tester (MHT, CSEM). Results: The analysis of the results of measurements and the calculations of total energy, i.e. elastic and inelastic (Wtotal,Welastic,Winelastic) and those of the parameters of hardness and elasticity made it possible to assess the impact of the process parameters (loading velocity, force and hold time) on mechanical properties of bone structures at a microscopic level. Conclusions: The coefficient k dependent on the ratio EIT / HIT and on the stored energy (ΔW = Wtotal- Welastic) is a measure of the material reaction to the loading and the deformation of tissue.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 2; 89-91
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of meteorological conditions in Svalbard fjords: Hornsund and Kongsfjorden
Autorzy:
Cisek, M.
Makuch, P.
Petelski, T.
Powiązania:
https://bibliotekanauki.pl/articles/47827.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
meteorological parameter
Arctic fjord
West coast
Spitsbergen
Svalbard Fjord
Hornsund
Kongsfjorden
air temperature
wind speed
wind direction
humidity
cloud cover
Opis:
This paper presents the results of a comparison of basic meteorological parameters in two Arctic fjords situated on the west coast of Spitsbergen, the main island of the Svalbard archipelago. Air temperature, wind speed and direction, humidity and cloud cover from the period 2005 to 2016 are described and compared with previous (from 1975) analyses of meteorological conditions in the investigated region. Such a choice of dates coincides with the time the GAME project measurements were carried out. The main goal of this study was to compare meteorological conditions in two fjords: Hornsund and Kongsfjorden, during the time of rapid climate changes. The results are collated with research results available in literature from previous years. We discovered that in the investigated period the climate of the Hornsund region is more oceanic than in Kongsfjorden. The stable level of the difference in climate elements is manifested and is evident mainly through greater amplitudes in air temperatures in Kongsfjorden, and in stronger winds in Hornsund.
Źródło:
Oceanologia; 2017, 59, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A system for the determination of surface water pCO2 in a highly variable environment, exemplified in the Southern Baltic Sea
Autorzy:
Stokowski, M.
Makuch, P.
Rutkowski, K.
Wichorowski, M.
Kulinski, K.
Powiązania:
https://bibliotekanauki.pl/articles/2078920.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
surface water
carbon dioxide
coastal zone
environment change
inorganic carbon
open water
Baltic Sea
Opis:
Measurement of pCO2 in highly dynamic coastal zones such as the southern Baltic Sea presents many challenges. In this study, we designed a system to measure pCO2 and then validated it in a series of laboratory and seagoing tests. The fast response time of the system was shown to provide a better resolution of CO2 system gradients. In the open waters of the Baltic Sea, the accuracy of the pCO2 measurements (±1.3 μatm) met the requirements of the ICOS (±2.0 μatm). In the coastal zone, there was less consistency between pCO2, DIC and pH measurements, suggesting the need to redefine the quality assurance and control requirements for the measurement of pCO2 in dynamic regions.
Źródło:
Oceanologia; 2021, 63, 2; 276-282
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laser-borided composite layer produced on austenitic 316L steel
Autorzy:
Mikołajczak, D.
Kulka, M.
Makuch, N.
Dziarski, P.
Powiązania:
https://bibliotekanauki.pl/articles/1203965.pdf
Data publikacji:
2016
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
laser boriding
austenitic steel
microstructure
hardness
wear resistance
borowanie laserowe
stal austenityczna
mikrostruktura
twardość
odporność na zużycie
Opis:
Austenitic 316L steel is well-known for its good resistance to corrosion and oxidation. Therefore, this material is often used wherever corrosive media or high temperatures are to be expected. The main drawback of this material is very low hardness and low resistance to mechanical wear. In this study, the laser boriding was used in order to improve the wear behavior of this material. As a consequence, a composite surface layer was produced. The microstructure of laser-borided steel was characterized by only two zones: re-melted zone and base material. In the re-melted zone, a composite microstructure, consisting of hard ceramic phases (borides) and a soft austenitic matrix, was observed. A significant increase in hardness and wear resistance of such a layer was obtained.
Źródło:
Archives of Mechanical Technology and Materials; 2016, 36; 35-39
2450-9469
Pojawia się w:
Archives of Mechanical Technology and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aerosol physical properties in Spitsbergens fjords: Hornsund and Kongsfjorden during AREX campaigns in 2014 and 2015
Autorzy:
Markuszewski, P.
Rozwadowska, A.
Cisek, M.
Makuch, P.
Petelski, T.
Powiązania:
https://bibliotekanauki.pl/articles/47891.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Arctic aerosol
Spitsbergen
aerosol size
aerosol optical property
distribution
Hornsund
Kongsfjorden
meteorological condition
Opis:
We present results of measurements of aerosol physical properties conducted on board of r/v Oceania during two cruises to the Spitsbergen region in 2014 (AREX 2014) and 2015 (AREX 2015). Measurements of aerosol size distribution, aerosol scattering coefficient and black carbon concentrations were made in two different Spitsbergen fjords: Hornsund and Kongsfjorden. The aerosol size distribution was measured in the size range from 0.09 μm to 47 μm using two aerosol size distribution spectrometers and a standard condensation particle counter. For the scattering coefficient an integrating nephelometer was used. Black carbon concentration was measured by an aethalometer. Temporal variabilities in physical properties of aerosol observed during the AREX 2014 and AREX 2015 campaigns were much higher than the differences between both fjords. The basic factors influencing aerosol conditions were advection and local generation of marine aerosol. In 2015 an episode of smoke advection was observed in both fjords causing an increase in the mean black carbon concentration from 7–12 ng m−3 to about 60 ng m−3, and an aerosol scattering coefficient at 550 nm from 2–4 Mm−1 to 12–17 Mm−1. Moreover, under certain conditions statistically significant gradients in aerosol optical properties were observed along the fjord axis reflecting an impact of mountains surrounding the fjords.
Źródło:
Oceanologia; 2017, 59, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aerosol Optical Depth variations due to local breeze circulation in Kongsfjorden, Spitsbergen
Autorzy:
Cisek, M.
Petelski, T.
Zielinski, T.
Makuch, P.
Pakszys, P.
Rozwadowska, A.
Markuszewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/47662.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
aerosol optical depth
aerosol
modification
Arctic region
Kongsfjorden
breeze circulation
wind speed
Spitsbergen
Opis:
This paper presents the results of Aerosol Optical Depth (AOD) studies which took place in Ny-Ålesund in the spring of 2014 during the iAREA campaign. The measurements were taken using Microtops II hand-held sunphotometers along the Kongsfjorden, on a path leading from the research village to the fjord opening. Local breeze circulation was observed during the measurement campaign which resulted in an evident increase of AOD along the measurement profile towards the open sea. Using the observed AOD, changes over the open sea have been calculated and the location of the breeze front has been determined.
Źródło:
Oceanologia; 2017, 59, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The utilization of the mesoporous Ti-SBA-15 catalyst in the epoxidation of allyl alcohol to glycidol and diglycidyl ether in the water medium
Autorzy:
Wróblewska, A.
Makuch, E.
Dzięcioł, M.
Jędrzejewski, R.
Kochmański, P.
Kochmańska, A.
Kucharski, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/777977.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
glycidol
diglycidyl ether
Ti-SBA-15 catalyst
allyl alcohol epoxidation
hydrogen peroxide
Opis:
This work presents the studies on the optimization the process of allyl alcohol epoxidation over the Ti-SBA-15 catalyst. The optimization was carried out in an aqueous medium, wherein water was introduced into the reaction medium with an oxidizing agent (30 wt% aqueous solution of hydrogen peroxide) and it was formed in the reaction medium during the processes. The main investigated technological parameters were: the temperature, the molar ratio of allyl alcohol/hydrogen peroxide, the catalyst content and the reaction time. The main functions the process were: the selectivity of transformation to glycidol in relation to allyl alcohol consumed, the selectivity of transformation to diglycidyl ether in relation to allyl alcohol consumed, the conversion of allyl alcohol and the selectivity of transformation to organic compounds in relation to hydrogen peroxide consumed. The analysis of the layer drawings showed that in water solution it is best to conduct allyl alcohol epoxidation in direction of glycidol (selectivity of glycidol 54 mol%) at: the temperature of 10–17°C, the molar ratio of reactants 0.5–1.9, the catalyst content 2.9–4.0 wt%, the reaction time 2.7–3.0 h and in direction of diglycidyl ether (selectivity of diglycidyl ether 16 mol%) at: the temperature of 18–33°C, the molar ratio of reactants 0.9–1.65, the catalyst content 2.0–3.4 wt%, the reaction time 1.7–2.6 h. The presented method allows to obtain two very valuable intermediates for the organic industry.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 4; 23-31
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electricity distribution management Smart Grid system model
Model systemu Smart Grid zarządzania dystrybucją energii elektrycznej
Autorzy:
Nowak, W.
Bąchorek, W.
Moskwa, S.
Tarko, R.
Szpyra, W.
Benesz, M.
Makuch, A.
Łabno, J.
Mazur, P.
Powiązania:
https://bibliotekanauki.pl/articles/397620.pdf
Data publikacji:
2012
Wydawca:
ENERGA
Tematy:
smart grid
optymalizacja sieci dystrybucyjnej średniego napięcia
rozproszona automatyka zabezpieczeniowa
optimization of medium voltage networks
distributed automatic protection
Opis:
This paper presents issues concerning the implementation of Smart Grid solutions in a real distribution network. The main components possible to quick implementation were presented. Realization of these ideas should bring tangible benefi ts to both customers and distribution system operators. Moreover the paper shows selected research results which examine proposed solutions in area of improving supply reliability and reducing energy losses in analysed network.
W  artykule przedstawiono zagadnienia dotyczące wdrażania rozwiązań typu Smart Grid w  konkretnej sieci rozdzielczej. Omówiono główne systemy, możliwe do szybkiego wdrożenia, których zastosowanie przyniesie wymierne korzyści zarówno odbiorcom energii elektrycznej, jak i operatorowi sieci. Przedstawiono też wybrane wyniki badań, których celem było sprawdzenie proponowanych rozwiązań pod kątem możliwości osiągnięcia założonych celów, a w szczególności poprawy pewności zasilania oraz ograniczenia strat energii w analizowanej sieci.
Źródło:
Acta Energetica; 2012, 2; 58-70
2300-3022
Pojawia się w:
Acta Energetica
Dostawca treści:
Biblioteka Nauki
Artykuł

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