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Wyświetlanie 1-15 z 239
Tytuł:
Conceptualizing meaning
Autorzy:
Doomen, Jasper
Powiązania:
https://bibliotekanauki.pl/articles/577040.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
meaning
reference
secondary reference
existence
Opis:
Descriptions have been the object of attention of many philosophers. The goal of this article is to inquire into the meaning of those descriptions which, due to the peculiar character of the objects of description, have been interpreted in different ways, and to investigate in which sense one is able to speak of the existence (or non-existence) of an object of description. The various sorts of descriptions are inquired; the question which entities exist and which do not is dealt with, and, in relation to this, how ‘meaning’ is to be understood.
Źródło:
Linguistica Silesiana; 2012, 33; 39-51
0208-4228
Pojawia się w:
Linguistica Silesiana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aspect of spatial location of permament GPS antennas by using visibility analysis
Autorzy:
Łubczonek, J.
Powiązania:
https://bibliotekanauki.pl/articles/224722.pdf
Data publikacji:
2009
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
stacje referencyjne
lokalizacja stracji referencyjnych
reference stations
tration location reference
Opis:
Spatial configuration of DGPS permanent reference station elements has an effect on performance of the entire system. Arrangement of station elements, such as broadcast antenna and reference masts, requires allowance and further linking together number of technical, operational and terrain factors. Some technical and operational factors as a rule are determined by equipment manufacturer, however terrain factors are conditioned by terrain character of the future reference station site. Terrain character is a composition of its surface shape and all geographical features situated within the reference station surroundings. These factors often can cause certain difficulties during recommended elements' arrangement of the planned reference station. This elaboration presents applications of visibility analysis in planning spatial location of reference station GPS antennas. Visibility, or viewshed, analysis is usually available in various computer programs of Geographic Information System environment. It can be performed from any point situated in three-dimensional space of elaboration range. In the case of such elements as permanent GPS antennas, application of visibility analyses solves a problem of their location with allowance of surroundings and geographical features, which can cause limitation of visibility of satellites and occurrence of multipath. By performing this kind of analyses can be determined threedimensional position of GPS antennas, which meets such requirements as recommended horizon visibility.
Źródło:
Reports on Geodesy; 2009, z. 1/86; 77-87
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Future of National Reference Frames – from static to kinematic?
Autorzy:
Poutanen, M.
Häkli, P.
Powiązania:
https://bibliotekanauki.pl/articles/145318.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
pozycjonowanie precyzyjne
georeferencja
pomiary geodezyjne
reference frames
kinematic reference frames
semi-kinematic reference frames
CORS
precise positioning
Opis:
Technical development, new applications and requests for increased accuracy in georeferencing are setting new demands for accuracy and reliability of reference frames. Due to crustal deformations and local movements of benchmarks, a static reference network deteriorates with time, thus eventually requiring update of the whole system. Technically, renewal of a reference frame is straightforward and should be done whenever enough new data or updated information exist to get an improvement in accuracy. An example is the International Terrestrial Reference Frame, ITRF, which is renewed regularly. The situation is more complicated with national reference frames which may have been given a legal status, and parameters defined by the national legislation. Even without that, renewal and implementation of such a frame is a multi-million euro project taking years to complete. Crustal deformations and movements deteriorate static reference frames (defined by fixed/static coordinates of benchmarks) with time. Eventually, distortions in a static reference frame will become bigger than the uncertainties of GNSS measurements, thus deteriorating the obtainable accuracy of the measurement technique. Instead of a static reference frame, one can use semi-kinematic or kinematic approach where either the transformation from global to the national reference frame or the coordinates of reference frame benchmarks are time-dependent. In this paper we give a short overview of the topic, and discuss on technical issues and future aspects of the reference frames in the viewpoint of National Mapping and Cadastre Authorities (NMA) with an example on the national strategy in Finland.
Źródło:
Geodesy and Cartography; 2018, 67, 1; 117-129
2080-6736
2300-2581
Pojawia się w:
Geodesy and Cartography
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
XENOS – the new standard
Autorzy:
Werner, K.
Powiązania:
https://bibliotekanauki.pl/articles/132160.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
measuring machine
reference machines
Opis:
XENOS. The name conjures up images of superheroes. Fitting, considering that the new coordinate measuring machine from ZEISS is entering a new realm of accuracy and dynamics with its innovative technology. XENOS delivers length measurement error of just 0.3 micrometers – unbeatable accuracy in this machine class. ZEISS has repeatedly pushed the limits of contact measuring with systems such as ZEISS PRISMO, ZEISS UPMC ultra or ZEISS F25. Today, they serve as reference machines in national institutes around the world.
Źródło:
Advanced Technologies in Mechanics; 2014, 1, no. 1 (1); 28-31
2392-0327
Pojawia się w:
Advanced Technologies in Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reference distribution based decision support platform
Autorzy:
Breja, K.
Ogryczak, W.
Powiązania:
https://bibliotekanauki.pl/articles/308085.pdf
Data publikacji:
2008
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
multiple criteria optimization
decision support systems
reference point method
reference distribution method
Opis:
There many decision problems where numerous partial achievement functions are considered impartially which makes the distribution of achievements more important than the assignment of several achievements to the specific criteria. Such models are generally related to the evaluation and optimization of various systems which serve many users where quality of service for every individual user defines the criteria. This applies to various technical systems, like to telecommunication ones among others, as well as to social systems. An example arises in location theory, where the clients of a system are entitled to equal treatment according to some community regulations. This paper presents an implementation of decision support framework for such problems. This platform is designed for multiple criteria problems analyzed with the reference distribution approach. Reference distribution approach is an extension of the reference point method.
Źródło:
Journal of Telecommunications and Information Technology; 2008, 3; 5-14
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Major concepts of recent celestial and terrestrial reference systems
Autorzy:
Kryński, J.
Powiązania:
https://bibliotekanauki.pl/articles/320416.pdf
Data publikacji:
2004
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
układ odniesienia
reference system
Opis:
The XXIV IAU General Assembly in Manchester in 2000, recommended to replace on 1 January 2003, the existing celestial reference systems with the International Celestial Reference System (ICRS). The International Terrestrial Reference System (ITRS) has formally been implemented in 1991, on the basis of the Resolution 2 of the XX IUGG General Assembly in Vienna in 1991. The ICRS consists of the ensemble of the Barycentric Celestial Reference System (BCRS) and the Geocentric Celestial Reference System (GCRS) with coordinate times Barycentric Coordinate Time (TCB) and Geocentric Coordinate Time (TCG), respectively. New celestial reference systems are built up on the basis of the relativistic theory of astronomical reference systems. Also new definition of the Intermediate Reference System (IRS) that links the celestial systems with the terrestrial system has been introduced. Orientation of the celestial IRS and the terrestrial IRS using CIP, CEO and TEO is discussed. Motion of the IRS with respect to the GCRS is determined by the new IAU 2000 precession-nutation model, while its motion with respect to the ITRS is determined by the Earth rotation parameters provided by the IERS. Presently used time systems and their actual definitions and mutual interrelations are discussed. Comparison of two approaches of computation of apparent places, the classical one and the IAU2000 one, illustrates the use of new reference systems.
Źródło:
Annual of Navigation; 2004, 8; 5-20
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of water needs of plants estimation basing on meteorological measurements
Ocena szacowania potrzeb wodnych roślin na podstawie pomiarów meteorologicznych
Autorzy:
Kiedrowicz, M
Rokosz, K
Palkova, Z
Valićek, J
Powiązania:
https://bibliotekanauki.pl/articles/1819403.pdf
Data publikacji:
2012
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
reference evapotranspiration
penman-monteith
Opis:
Na podstawie pomiarów zarejestrowanych przez dwie automatycznestacje meteorologiczne, położone w Polsce i na Słowacji została obliczona ewapotranspiracja (ET0) według wzoru opracowanego przez Hargreavesa. Uzyskane wyniki porównano ze wzorem odniesienia zalecanego przez FAO, która przyjęła wzór Penmana-Monteitha (PM).Wysoka korelacja pomiędzy modelem odniesienia a wzorem uproszczonym Hergreavesa została pokazana. Różnice dotyczą poziomu ewapotranspiracji opracowanych na podstawie wzorów. Model Hargreaves daje wyższą wartość w porównaniu z formułą PM. W celu zastosowania modelu Penmana-Monteitha w praktyce potrzebne jest wiele parametrów meteorologicznych które są wymagane. Brak dostępu do szczegółowych danych meteorologicznych jest poważnym ograniczeniem. Metoda Hergreavesa może być używana, ale wymaga ona dalszych badań w zarówno w naszych jak i zagranicznych warunkach weryfikacji o czynniki empiryczne.
Źródło:
Rocznik Ochrona Środowiska; 2012, Tom 14; 123-131
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A possibilistic view on set and multiset comparison
Autorzy:
Bronselaer, A.
Hallez, A.
Tre, G. de
Powiązania:
https://bibliotekanauki.pl/articles/970953.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
evaluator
co-reference
multisets
sets
Opis:
Comparative evaluation operators for sets and multisets are proposed from a possibilistic point of view. In general, an evaluator estimates the possibility of (non) co-reference of two arbitrary (sub)-objects. Such operators can be used in a hierarchical possibilistic framework for finding co-referent objects with a complex structure. This paper first discusses properties of evaluators in general and continues with studying operators for sets and multisets, thereby making a clear distinction between hard and soft evaluators. Hard evaluators are based on evaluation of derived (multi)sets, while soft evaluators use a low level evaluator to incorporate co-reference at element level. The two important parts of such a soft evaluator are an injective element mapping and an aggregation function. An algorithm to provide the injective mapping is presented and discussed. For the aggregation step, ordered weighted conjunction is studied by introducing parameterized fuzzy quantifiers to calculate weight vectors. An advanced learning strategy is introduced to train the optimal parameter matrix.
Źródło:
Control and Cybernetics; 2009, 38, 2; 341-366
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Public relations in society. A new approach to the difficult relationships between PR and its environment
Autorzy:
Hoffjann, Olaf
Powiązania:
https://bibliotekanauki.pl/articles/471101.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Komunikacji Społecznej
Tematy:
system theory
legitimacy
reference group
Opis:
In political and philosophical terms public relations and society appear to be at odds with each other. Public relations as the representative of individual interests is opposed to the general wellbeing of society. The contradictions between PR and society should form the basis for an analysis of the relationship between PR and society from a system theory perspective (Luhmann, 1996). In the course of the examination one can differentiate between three levels of PR and society: (1) PR as part of society: in this regard the question will be what PR does for society. (2) Society in the PR environment: at this level the question will be how organisations regard society and how PR constructs societal models. (3) The entirety of PR sees itself as being apart from society: in a dynamic perspective the question here will be how the refl exive expectations change the relationship between PR and its environment.
Źródło:
Central European Journal of Communication; 2011, 4, 1(6); 63-76
1899-5101
Pojawia się w:
Central European Journal of Communication
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
MEMS technology quality requirements as applied to multibeam echosounder
Autorzy:
Bikonis, K.
Demkowicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/260431.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Inertial Measurements Unit
Multibeam Echo Sounder
attitude and heading reference system
motion reference unit
Opis:
Small, lightweight, power-efficient and low-cost microelectromechanical system (MEMS) inertial sensors and microcontrollers available in the market today help reduce the instability of Multibeam Sonars. Current MEMS inertial measurement units (IMUs) come in many shapes, sizes, and costs — depending on the application and performance required. Although MEMS inertial sensors offer affordable and appropriately scaled units, they are not currently capable of meeting all requirements for accurate and precise attitudes, due to their inherent measurement noise. The article presents the comparison of different MEMS technologies and their parameters regarding to the main application, namely Multibeam Echo Sounders (MBES). The quality of MEMS parameters is crucial for further MBES record-processing. The article presents the results of undertaken researches in that area, and these results are relatively positive for low-cost MEMS. The paper undertakes some vital aspect of using MEMS in the attitude and heading reference system (AHRS) context. The article presents a few aspects of MEMS gyro errors and their estimation process in the context of INS processing flow, as well as points out the main difficulties behind the INS when using a few top MEMS technologies.
Źródło:
Polish Maritime Research; 2018, 4; 59-64
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reference intervals for transthoracic echocardiographic measurements in adult Dachshunds
Autorzy:
Garncarz, M.
Parzeniecka-Jaworska, M.
Czopowicz, M.
Hulanicka, M.
Jank, M.
Szaluś-Jordanow, O.
Powiązania:
https://bibliotekanauki.pl/articles/2087641.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
echocardiography
Dachshund
dog
reference interval
Źródło:
Polish Journal of Veterinary Sciences; 2018, 21, 4; 779-788
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Load Dependence of Micro-Hardness Measurements: Analysis of Data by Different Models and Evaluation of Measurement Errors
Autorzy:
Petrik, J.
Powiązania:
https://bibliotekanauki.pl/articles/353270.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
micro-hardness
ISE
standard reference block
Opis:
The influence of applied loads between 0.09807 N and 0.9807 N on measured values of micro-hardness was evaluated by Meyer’s index n, proportional specimen resistance model (PSR) and Hays – Kendall methods, Total Dispersion Zone and Analysis of Variance (ANOVA). The measurement was repeated 6 times using the same hardness reference block with standard hardness Hc = 327 HV0.05 as a sample. The influence of the load on the measured value of micro-hardness is statistically significant, and the relationship between applied load and micro-hardness manifests reverse indentation size effect (ISE) for most of “measurements”. The high value of the uncertainty of results can affect the existence and nature of ISE, especially at low loads.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 4; 1819-1824
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Moisture conditions during the vegetation season in years 1954–1995 in Łódź
Autorzy:
Musiał, E.
Gąsiorek, E.
Powiązania:
https://bibliotekanauki.pl/articles/123627.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
reference evapotranspiration
precipitation
climatic water balance
Opis:
The standardized precipitation index (SPI), standardized reference evapotranspiration index (SEI) and standardized climatic water balance index (SCWBI) were used to analyze moisture conditions in the vegetation seasons of 1954–1995 in Łódź. SPI and SEI were calculated on the assumption that empirical monthly precipitation sums and monthly sums of reference evapotraspiration are gamma distributed. Because monthly sums of climatic water balance are normally distributed, they required standardization to SCWBI. The aim of study was to compare those three indexes (SPI SEI and SCWBI) for years 1954–1995 in Łódź.
Źródło:
Journal of Ecological Engineering; 2015, 16, 5; 190-196
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neck circumference reference values for apparently healthy Nigerian adults aged 18 to 60 years
Autorzy:
Ojo, Ojoawo A.
Temitayo, Adeyemi P.
Abiodun, Ibidun O.
Oluwaole, Awotidebe T.
Ayotunde, Awotipe D.
Powiązania:
https://bibliotekanauki.pl/articles/39823836.pdf
Data publikacji:
2022
Wydawca:
Politechnika Opolska. Wydział Wychowania Fizycznego i Fizjoterapii
Tematy:
Neck circumference
Reference value
Adults
Nigerians
Opis:
Neck circumference (NC) is a marker of upper body subcutaneous adipose tissue distribution. Although it is commonly used in many parts of the world it appears to lack reference values as an indicator of metabolic and cardiovascular risk in the Nigerian population. A total of 2000 apparently healthy adults participated in this study. NC was measured using a non-stretchable tape between the mid-cervical spine and mid-anterior neck of each participant standing upright. In men the NC was measured just below the laryngeal prominence (Adam’s apple). Data was summarized using descriptive and inferential statistics. The alpha level was set at 0.05. The Nigerian men under study had significantly higher NC values than the women (t = 36.986, p = 0.001). The mean values for men and women below 20 years, between 21 and 30 years, 31 and 40 years, 41 and 50 years, and 51 and 60 years old were 37.29 ± 1.96 cm and 32.45 ± 1.84 cm, 37.69 ± 2.16 cm and 33.12 ± 2.52 cm, 37.67 ± 2.25 cm and 32.46 ± 2.24 cm, 38.01 ± 2.49 cm and 33.36 ± 2.67 cm, and 37.59 ± 2.29 cm and 33.14 ± 1.78 cm, respectively. The 95 percentile values for men and women younger than 20 years, 31-40 years, 41-50 years, and 51-60 years were 41cm and 36 cm, 42 cm and 38 cm, 41cm and 37 cm, 43 cm and 39 cm, and 42 cm and 37 cm, respectively. Based on age-and-sex neck circumference reference values, the means and percentiles can be used as indicators of acceptable and abnormal NC values for Nigerian adults between the ages of 18 to 60 years.
Źródło:
Journal of Physical Education & Health - Social Perspective; 2022, 11, 19; 23-29
2084-7971
Pojawia się w:
Journal of Physical Education & Health - Social Perspective
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On a lasting role of geodynamics in modern vertical and gravity reference systems
Autorzy:
Kryński, J.
Barlik, M.
Powiązania:
https://bibliotekanauki.pl/articles/224659.pdf
Data publikacji:
2012
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
vertical reference system
gravity reference system
geodynamics
metrology
pionowy układ odniesienia
grawitacyjny układ odniesienia
geodynamika
metrologia
Opis:
Both definition and realization of vertical reference systems require gravity. Relation between height changes and gravity changes is well known in geodynamics on local, regional, and global scale. Consideration of time as additional dimension is needed in the modern vertical and gravity reference systems as well as in processing both levelling and gravity data. Classical vertical and gravity reference systems are briefly presented followed by the discussion of the need of advanced modification of both systems. Geodynamic aspects in creating modern vertical and gravity reference systems were discussed. The role of geodynamics in the realization of vertical and gravity reference systems was presented with emphasizing the key role of metrology.
Źródło:
Reports on Geodesy; 2012, z. 1/92; 61-68
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 239

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