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Wyszukujesz frazę "field of work" wg kryterium: Temat


Wyświetlanie 1-6 z 6
Tytuł:
Possibility of using visualization to present running point of marine diesel engine
Autorzy:
Krzyżanowski, J.
Witkowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/246958.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
monitoring
marine diesel engine
torque
field of work engine
Opis:
The following paper introduces us to possibility of using visualization to present running point of main marine diesel engine during ship operation. Construction development of ship marine diesel engine going towards more and more power results in large mechanical and thermal load. So ship marine diesel engines of new generation are more susceptible to damage caused by overloading than the ones of older generation. For this reason more and more attention is paid to proper operation of these main marine engines understood as the way of choosing the right parameters resulting in adequate point of engine operation. This kind of exploitation is being reflected in more and more rigorous requirements imposed by ship engine producers concerning the conditions of their exploitation. This paper presents measured parameters during engine operation and of the sometime confirming its current performance. Special attention has been paid to the measurement of torque. Measurement of torque and revolution speed of the main marine diesel engine have been linked with the possibility of visual presentation of running point of the engine. By means of research carried out of HCP Engine Test Bed it was possible to prove effectiveness of succession of measurement instruments and torque meter action. Visualization algorithm which can be used to present field of work and running point of the engine has also been tested.
Źródło:
Journal of KONES; 2010, 17, 2; 271-275
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The accuracy of defining the energy efficiency of drive systems exemplified by comparison with hydrostatic drives with proportional motor speed control
Autorzy:
Skorek, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/135559.pdf
Data publikacji:
2019
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
energy efficiency
useful power
power of losses
accuracy
field of work
drive system
hydrostatic transmission
Opis:
The aim of the article is to look at the possibility of accurately determining the energy efficiency of drive systems. The results of experimentally determined efficiencies and the efficiencies determined from simulations of two hydrostatic systems with throttling control and fed by a constant capacity pump were compared. The research apparatus was very precisely designed, made and automated. The measuring instruments that were used are characterized by their high measuring accuracy. The issues related to the determination of the energy losses and the energy efficiency of the hydraulic motor or drive system, which should be determined as dependent on the physical quantities independent of these losses, were also discussed. A Paszota diagram of the power increase in the direction opposite to the direction of the power flow, replacing the Sankey diagram of the power decrease in the direction of the power flow in the hydraulic motor or in the drive system, was analyzed. The results showed that a Paszota diagram opens up a new perspective on research on the power of energy losses and energy efficiency of hydraulic motors and drive systems.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2019, 58 (130); 32-41
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studying Corruption: Reflections on the Methodological, Practical, and Personal Challenges
Autorzy:
Roman, Alexandru V.
Powiązania:
https://bibliotekanauki.pl/articles/2107227.pdf
Data publikacji:
2016-07-31
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Public Corruption
Eastern Europe
Republic of Moldova
Methodology
Challenges of Field Work
Opis:
There is a growing recognition among scholars that those engaged in qualitative research often face a number of serious methodological and personal challenges. Rather surprisingly, these difficulties receive relatively limited attention within the academic literature. Given the rising role of qualitative methodologies within social science research, the benefits of and the need for honest and practical discussions regarding what researchers should expect when entering fieldwork become increasingly obvious. This article draws on my fieldwork experiences of studying public corruption in the Republic of Moldova, a former Soviet state. I provide reflections on the methodological, practical, and personal challenges of conducting qualitative research on a sensitive issue within a social setting that is not structurally inclined to support projects of such nature. The discussion is primarily focused on the research difficulties that are bound to arise with any attempt to confirm previously suggested propositions within the post-Soviet social matrices. This article and the suggestions made here fall in line with a number of other recent works which have been motivated by the call to share insights and guidance about the challenges, “tricks of the trade,” and dangers of fieldwork in remarkable settings.
Źródło:
Qualitative Sociology Review; 2016, 12, 3; 6-27
1733-8077
Pojawia się w:
Qualitative Sociology Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modern methods of use of geographic maps in field research for localisation of objects
Autorzy:
Macioch, Andrzej
Mikulska, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/2032524.pdf
Data publikacji:
2006-06-01
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
field work
elements of mathematical basis
GPS
calibration
paper map
digital map
vector map
satellite receiver
geographic coordinates
Opis:
In the paper the author described briefly modern technical possibilities of supporting the use of maps in field research and presented methods of map use in localisation of objects. In his description of the methods the author presented the differences in the approach to the problem depending on the features of the maps, both paper and digital ones. He also stressed the issue of adjustment of the features related to the cartometricity of the maps in use to the coordinate system in which the data reąuired for the field projects are obtained and processed.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2006, 12; 297-304
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decision system model for HC exploration on the basis of DST test results
Autorzy:
Dubiel, S.
Zubrzycki, A.
Maruta, M.
Powiązania:
https://bibliotekanauki.pl/articles/298767.pdf
Data publikacji:
2013
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
petroleum explorations
HC reservoir assessment
Carpathian Foredeep basement
Upper Jurassic carbonate reservoir rocks
DST tests results
model of the work-flow decision
HC field management
Opis:
The paper presents the results of 57 Drill Stem Tests (DST) within the Upper Jurassic carbonate rocks forming the Carpathian Fordeep basement in the area between Bochnia and Ropczyce (south Poland) performed by the Polish Oil and Gas Company in the years 1993 to 1998. Designated prospective horizons were tested with DST for assessing productivity of strata. DST tests were performed mostly in open hole sections of boreholes (more rarely in cased holes) after prior borehole casing perforation operations. In approximately 75% cases the cycle drill stem tests (DST) was used for testing the Upper Jurassic carbonate rocks. On the basis of data and experiences obtained during exploration of the Upper Jurassic carbonate rocks the model of the work-flow decision diagram was elaborated. It may be used for the integrated HC field management and for possible modifications in the drilling and testing technology.
Źródło:
AGH Drilling, Oil, Gas; 2013, 30, 1; 51-56
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamic Characteristics of Solid
Autorzy:
Pluta, Z.
Hryniewicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/411946.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
thermodynamic characteristics
interstate space
hermodynamics
solid
potential field
specific proper heat energy
specific gained heat energy
energetic band
heat work
source characteristics of entropy growth
entropy constant
Opis:
The paper is to present the developed thermodynamic characteristics of a solid. The existent description of dependence of temperature on the proper entropy (thermal capacitance) was used as the beginning point of the considerations. A critical evaluation of the picture of that dependence was a consecutive link of the considerations. Furthermore, an adequate description of the discussed heat phenomenon, taking into account the detailed characteristics of the entropy growth characteristics, has been presented. This characteristics indicates a clear quantum character of the studied reality, reflected by the potentials, proper and gained, respectively. These magnitudes are the measures of the proper and gained specific energies of this thermodynamic factor. The dependence of temperature on the specific energy has been described to formulate a formula on the heat work. At the end the dependence between the specific heat and the entropy constant is derived. In conclusion, a quantum nature of macroscopic reality has been noticed together with the definition of the heat energy notion. The necessity of noticing the description of any other reality in this scale has been indicated.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 2; 60-71
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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