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Wyświetlanie 1-15 z 87
Tytuł:
Bayesian estimation and prediction based on Rayleigh record data with applications
Autorzy:
Awwad, Raed R. Abu
Bdair, Omar M.
Abufoudeh, Ghassan K.
Powiązania:
https://bibliotekanauki.pl/articles/1827533.pdf
Data publikacji:
2021-09-06
Wydawca:
Główny Urząd Statystyczny
Tematy:
Bayesian estimation and prediction
Rayleigh distribution
record values
Markov Chain Monte Carlo samples
Opis:
Based on a record sample from the Rayleigh model, we consider the problem of estimating the scale and location parameters of the model and predicting the future unobserved record data. Maximum likelihood and Bayesian approaches under different loss functions are used to estimate the model's parameters. The Gibbs sampler and Metropolis-Hastings methods are used within the Bayesian procedures to draw the Markov Chain Monte Carlo (MCMC) samples, used in turn to compute the Bayes estimator and the point predictors of the future record data. Monte Carlo simulations are performed to study the behaviour and to compare methods obtained in this way. Two examples of real data have been analyzed to illustrate the procedures developed here.
Źródło:
Statistics in Transition new series; 2021, 22, 3; 59-79
1234-7655
Pojawia się w:
Statistics in Transition new series
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ poziomu wzbogacenia próbek żywności solami magnezu, wapnia, potasu i sodu na współczynnik odzysku wyznaczony metodą płomieniowej absorpcyjnej spektrometrii atomowej
The impact of the level of enrichment of food samples by salts of magnesium, calcium, potassium, and sodium for the recovery factor determined by the flame atomic absorption spectrometry
Autorzy:
Bajek, D.
Łęska, J.
Nowicki, D.
Kozłowski, C.
Powiązania:
https://bibliotekanauki.pl/articles/410301.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
żywność
składnik mineralny
próbka wzbogacona
mineralizacja mikrofalowa
walidacja metody
food
mineral component of food
enriched samples
microwave mineralization
validation of analytical methods
Opis:
W artykule podjęto próbę określenia wpływu poziomu wzbogacenia próbek żywności na wartości współczynników odzysku substancji badanej. Na podstawie badań przeprowadzonych techniką FAAS na próbkach żywności należących do siedmiu różnych grup produktów spożywczych stwierdzono zależność pomiędzy rodzajem zastosowanej matrycy, wielkością naważki, poziomem wzbogacenia i warunkami mineralizacji, a wyznaczonymi wartościami współczynników odzysku. Średnie wartości współczynników odzysku wyznaczone dla analizowanych matryc były najbardziej zbliżone w przypadku wapnia, a najbardziej rozbieżne w przypadku sodu. Spośród analizowanych próbek żywności mięso surowe było matrycą, dla której średnie wartości współczynników odzysku wyznaczone dla wszystkich oznaczanych pierwiastków miały zbliżoną wartość. Z kolei najmniej wyrównanym poziomem średniej wartości odzysku charakteryzowało się mleko surowe.
The article attempts to identify the impact of the state of food samples, their complexity, size, and homogeneity of weighed amounts, the level of enrichment, as well as the conditions used for mineralization on the recovery coefficients of the test substance. The research conducted by the FAAS technique on samples of food belonging to seven different groups of food products showed a relationship between the type of matrix used, the size of the sample, the level of enrichment, and mineralization conditions and the designated recovery coefficients. Average values of the coefficients set for the recovery among analyzed matrices were most similar for calcium, and the most divergent in the case of sodium. Among the analyzed samples of food raw, meat was the matrix for which the average values of coefficients determined for the recovery of all elements had similar value. The lowest average balanced level of recovery was observed for raw milk.
Źródło:
Chemistry, Environment, Biotechnology; 2016, 19; 105-109
2083-7097
Pojawia się w:
Chemistry, Environment, Biotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the detection efficiency of haemoparasite DNA in blood and faecal samples – the way to eco-epidemiological studies
Autorzy:
Bajer, A.
Dwużnik, D.
Tołkacz, K.
Alsarraf, M.
Mierzejewska, E.J.
Powiązania:
https://bibliotekanauki.pl/articles/2085115.pdf
Data publikacji:
2019
Wydawca:
Instytut Medycyny Wsi
Tematy:
Babesia canis
Babesia microti
Babesia vulpes
Hepatozoon canis
red fox
faecal samples
faeces
Opis:
Introduction and objective. It is easier and non-invasive to obtain faecal samples compared with blood samples. Molecular techniques may enable detection of parasites even in tiny amounts of blood-containing faeces. We aimed to compare the sensitivity of detection of three Babesia species and Hepatozoon canis in blood and faecal samples, including samples derived from naturally infected hosts. Materials and method. Three groups were involved: 1) Nine BALB/c mice infected with Babesia microti sampled during acute (n=3), post-acute (n=3) and chronic phases of infection (n=3); 2) Eight dogs with symptoms of babesiosis; 3) Six red foxes infected with B. vulpes, one fox infected with B. canis, four foxes infected with H. canis. Genomic DNA was extracted from blood and faeces by use of commercial kits and amplified with genus-specific primers in one-step or nested PCR reactions. Selected PCR products were sequenced. Results. No positive results for faecal samples were obtained from H. canis-positive foxes in contrast to Babesia spp. infections. Positive results from PCRs were obtained for all BALB/c mice (100%), five dogs (62.5%) and four of seven foxes (57.1%). Successful sequencing was obtained for six selected murine samples (B. microti), four canine samples (B. canis) and for one fox sample (B. vulpes). The success of B. microti detection in murine faecal samples from acute, post-acute and chronic phases was identical (100%). Conclusions. Detectability of Babesia spp. infections was lower in naturally infected dogs and foxes, compared to experimentally infected mice. Detection of DNA in faecal samples can be useful in the detection of Babesia infection in populations from which blood samples are hard to obtain, but due regard must be given to the possibility that prevalence of infection may be severely underestimated.
Źródło:
Annals of Agricultural and Environmental Medicine; 2019, 26, 4; 538-543
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
SB V 8754: Apostoloi, antapostoloi, and the Ptolemaic grain transport
Autorzy:
Balamoshev, Constantinos
Powiązania:
https://bibliotekanauki.pl/articles/1195407.pdf
Data publikacji:
2019
Wydawca:
Fundacja im. Rafała Taubenschlaga
Tematy:
Ptolemaic
first century bc
grain transport
samples
administration
archives
naukleros
dioiketes
sitologos
strategos
basilikos grammateus
apostoloi
antapostoloi
phylakitai
ship security guards
shipping
shipowners
corrections
Opis:
This paper offers new annotated readings and corrections to the original edition of P. Berlin inv. 16876 = SB V 8754 (from the archive of Har chebis, the royal scribe of the Herakleopolite nome), also discussing subsequent corrections proposed by various scholars in the past. Special attention is placed on the hapax legomenon technical term antapostoloi. The connection of these documents with the term apostoloi is investigated as well as their function within the framework of the shipping procedure and the officials involved in their issuance. Finally, appended is a transcription that reflects the current state of the papyrus, together with a translation into English.
Źródło:
The Journal of Juristic Papyrology; 2019, 49; 1-16
0075-4277
Pojawia się w:
The Journal of Juristic Papyrology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the percentage of reinforcement by un-stressed rebar on the deformability of pre-stressed RC beams
Autorzy:
Blikharskyy, Yaroslav
Selejdak, Jacek
Bobalo, Taras
Khmil, Roman
Volynets, Myhailo
Powiązania:
https://bibliotekanauki.pl/articles/23965519.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
wzmocnienie
belka RC
próbki w rzeczywistym rozmiarze
wyniki eksperymentalne
pre-stressed
reinforcement
RC beam
real size samples
experimental results
Opis:
This article presents the materials of deformability studies of pre-stressed steel-concrete beams reinforced with a package of reinforcement with different ratio of tape and rebar in the pure bending moment zone. The aim of the research was determination of the reinforcement percentage influence, for pre-stressed reinforced concrete beams reinforced with a package of reinforcement on their deformability. Also, the aim was to evaluate the effectiveness of using pre-stressed rebar in combined reinforcement. The practical significance of the experimental research is to study the deformability in pre-stressed bending elements with external tape and rebar reinforcement, taking into account the influence of different ratios of reinforcement areas within the combined reinforcement and development of proposals for such structures` calculation and design. The scientific novelty of the research is in obtaining the deformability characteristics of reinforced concrete beams reinforced with a package of reinforcement (tape and steel bars with periodic profile) with different ratios in the case of static loads` action.
Źródło:
Production Engineering Archives; 2021, 27, 3; 212--216
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metodyka zabezpieczania środowiskowych śladów wpostaci materiału okrzemkowego
Methodology for securing environmental traces in the form of diatomaceous material
Autorzy:
Bogusz, Iwona
Żelazna-Wieczorek, Joanna
Jesionowska, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/30146546.pdf
Data publikacji:
2023-03
Wydawca:
Centralne Laboratorium Kryminalistyczne Policji
Tematy:
diatomologia kryminalistyczna
okrzemki
procedura zabezpieczania prób srodowiskowych
forensic diatomology
diatoms
procedure for securing environmental samples
Opis:
Wykorzystanie okrzemek jako środowiskowych śladów kryminalistycznych stanowi idealne narzędzie do powiązania osoby z konkretnym miejscem – środowiskiem, a także może być pomocne przy diagnozowaniu utonięć lub przy typowaniu miejsca utonięcia. Narzędzie to jest standardowo stosowane przez organy ścigania w wielu krajach Europy, a także w Australii, Chinach, Indiach oraz Stanach Zjednoczonych Ameryki. Celem niniejszej pracy jest wskazanie możliwych metod i zasad, które powinny być stosowane przy zabezpieczaniu okrzemek na miejscu zdarzenia podczas takich czynności procesowych jak: oględziny i przeszukanie, a także propagowanie wiedzy z zakresu diatomologii kryminalistycznej w Polsce. Niniejsza metodyka została opracowana w oparciu o uznane i powszechnie stosowane doświadczenia w pozyskiwaniu i zabezpieczaniu okrzemek do celów badan z zakresu ich taksonomii i ekologii na podstawie piśmiennictwa. Rekomendujemy procedurę postępowania przy zabezpieczaniu materiału okrzemkowego oparta na metodach stosowanych i wypracowanych przez naukowców oraz dostosowana do warunków i technicznych możliwości, którymi dysponuje polski policjant – technik kryminalistyki.
The use of diatoms as environmental forensic traces is an ideal tool for linking a person to a specific place – environment, and may also be helpful in diagnosing drownings or determining the place of drowning. This is a standard tool used by law enforcement agencies in numerous European countries, as well as in Australia, China, India and the United States of America. The aim of this work is to indicate possible methods and principles that should be used to secure diatoms at the scene during procedural activities such as site examination and search, as well as to promote knowledge in the field of forensic diatomology in Poland. This methodology was developed based on recognized and widely used experience in obtaining and securing diatoms for the purposes of research based on their taxonomy and ecology as well as on the literature. We recommend a procedure for securing diatom material based on methods used and developed by scientists and adapted to the conditions and technical capabilities available to a Polish police officer – a forensic technician.
Źródło:
Problemy Kryminalistyki; 2023, 319; 5-18 (pol), 39-52 (eng)
0552-2153
Pojawia się w:
Problemy Kryminalistyki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problemy oceny procedury pomiaru stężenia szkodliwych związków chemicznych w gazach odlotowych powstających podczas termicznego przekształcania odpadów przemysłowych
Problems of quality evaluation of the exhausted gas monitoring during a thermal process of waste industrial conversion
Autorzy:
Borek., R.
Gieroń, M.
Stec, W.
Powiązania:
https://bibliotekanauki.pl/articles/155060.pdf
Data publikacji:
2006
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
jakość pomiarów
składowe gazu
odpady
przygotowanie próbki
quality of measurement
gaseous components
waste composition
samples preparation
Opis:
W artykule rozpatrzono zagadnienia związane z oceną jakości pomiarów wykorzystywanych do wyznaczenia stężeń składników lotnych powstających w procesie termicznego przekształcania odpadów przemysłowych. Zwrócono uwagę na specyficzne problemy pomiaru składników gazów odlotowych. Rozważano sposób pobierania próbki gazów odlotowych i wynikające stąd błędy analizy.
In this article, problems of quality evaluation of the measurements used for designation of gaseous components concentration generated in the thermal process of waste industrial conversion have been discussed. The attention was paid to some measurement problems of the exhausted gas components when the waste composition changes at random. The method of samples preparation of the exhausted gases and errors of their analysis has been considered.
Źródło:
Pomiary Automatyka Kontrola; 2006, R. 52, nr 12, 12; 34-37
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Further Discussion on Modeling of Measuring Process via Sampling of Signals
Autorzy:
Borys, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/226039.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
measuring process
sampling of signals
smearing of signal samples
averaging of signal samples
Opis:
In this paper, we continue a topic of modeling measuring processes by perceiving them as a kind of signal sampling. And, in this respect, note that an ideal model was developed in a previous work. Whereas here, we present its nonideal version. This extended model takes into account an effect, which is called averaging of a measured signal. And, we show here that it is similar to smearing of signal samples arising in nonideal signal sampling. Furthermore, we demonstrate in this paper that signal averaging and signal smearing mean principally the same, under the conditions given. So, they can be modeled in the same way. A thorough analysis of errors related to the signal averaging in a measuring process is given and illustrated with equivalent schemes of the relationships derived. Furthermore, the results obtained are compared with the corresponding ones that were achieved analyzing amplitude quantization effects of sampled signals used in digital techniques. Also, we show here that modeling of errors related to signal averaging through the so-called quantization noise, assumed to be a uniform distributed random signal, is rather a bad choice. In this paper, an upper bound for the above error is derived. Moreover, conditions for occurrence of hidden aliasing effects in a measured signal are given.
Źródło:
International Journal of Electronics and Telecommunications; 2020, 66, 3; 507-513
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Method of calculation of specific electrical conductivity of agro-biological soil environment by stationary contact method of operating electrodes of information and technical system of local operating monitoring
Autorzy:
Brovarets, O.
Powiązania:
https://bibliotekanauki.pl/articles/410686.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
information and technical system
local operational monitoring
soil
samples
variability
size
research
Opis:
Modern agriculture involves the implementation of a particular technological operation, according to the appropriate map-task, which is developed pre-based on diverse information. Knowledge of a certain structure of soil cover variability, obtained using information and technical systems of local operational monitoring of agro-biological state of agricultural lands, allows us to adopt effective operational decisions for efficient management of agro-biological potential of agricultural lands. Obviously, under such conditions, there is a need for fundamentally new approaches to agricultural production,which is to ensure the proper quality of technological operations. The quality of the implementation of technological operations is an integral indicator of the efficiency of production of agricultural products within the agro-biological field. The necessary quality of implementation of the basic technological processes in plant growing is provided by the integrated information and technical systems of operational monitoring of the agro-biological state of agricultural lands. In connection with this, the task is to obtain reliable data on the agro-biological state of the soil environment by reducing the error in determining the magnitude of the conductive properties of the soil, providing individual stabilization of the working electrodes and the mechanism of lifting / lowering working electrodes, copying inequalities of the soil environment, reducing the intensity of the destruction of the soil structure , self-cleaning of the working contact of the electrode and ensuring the stability of the electrical contact of the electrode with the soil, by instrument design perfection. The task is achieved by using the information and technical system of operational monitoring of the soil environment of the structure to determine the conductive characteristics of the soil environment.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2019, 8, 1; 3-10
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Software for Information and Technical System of Operational Monitoring of Agrobiological State of Agricultural Land of Oleksandr Brovarets Construction
Autorzy:
Brovarets, O.
Powiązania:
https://bibliotekanauki.pl/articles/972983.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
information and technical system
local operational monitoring
soil
samples
variability
size
research
functional structure
software
program code
management algorithms
Opis:
Modern agriculture involves the implementation of a particular technological operation, according to the appropriate map-task, which is developed pre-based on diverse information. Knowledge of a certain structure of soil cover variability, obtained using information and technical systems of local operational monitoring of the agrobiological state of agricultural lands, allows us to adopt effective operational decisions for efficient management of agrobiological potential of agricultural lands. Obviously, under such conditions, there is a need for fundamentally new approaches to agricultural production, which is to ensure the proper quality of technological operations. The quality of the implementation of technological operations is an integral indicator of the efficiency of production of agricultural products within the agrobiological field. The necessary quality of implementation of the basic technological processes in plant growing is provided by the integrated information and technical systems of operational monitoring of the agrobiological state of agricultural lands. In connection with this, the task is to use a fundamentally new class of information and technical systems of local operational monitoring of the agrobiological state of agricultural lands. The task is achieved by using the information and technical system of operational monitoring of the soil environment of the structure to determine the conductive characteristics of the soil environment. The purpose of this research is to develop and substantiate the functional structure, software, writing code and algorithms for managing the executive bodies of the information and technical system of operational monitoring of the agrobiological state of the soil environment of agricultural lands.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2019, 8, 4; 28-41
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Method of Calculation of the Specific Electrical Conductivity of the Soil Obtained be the Information and Technical System of Local Operational Monitoring of the Agrobiological State of Agricultural Land
Autorzy:
Brovarets, O.
Powiązania:
https://bibliotekanauki.pl/articles/410708.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
information and technical system
local operational monitoring
soil
samples
variability
size
research
Opis:
Modern agriculture foresees the implementation of a particular technological operation, according to the appropriate map-task, which is developed pre-based on diverse information. Knowledge of a certain structure of soil cover variability, obtained using information and technical systems of local operational monitoring of the agrobiological state of agricultural lands, allows us to adopt effective operational decisions for efficient management of agrobiological potential of agricultural lands. Obviously, under such conditions there is a need for fundamentally new approaches to agricultural production, which is to ensure the proper quality of technological operations. The quality of the implementation of technological operations is an integral indicator of the efficiency of production of agricultural products within the agrobiological field. The necessary quality of implementation of the basic technological processes in plant growing is provided by the integrated information and technical systems of operational monitoring of the agrobiological state of agricultural lands. This opens new prospects for organic farming using such smart agricultural machines. In connection with it the task is to obtain reliable data on the agrobiological state of the soil environment by reducing the error in determining the magnitude of the electrical conductive properties of the soil, providing individual stabilization of the working electrodes and the mechanism of lifting / lowering the working electrodes, copying inequalities of the soil environment, reducing the intensity of the destruction of the soil structure , selfcleaning of the working contact of the electrode and ensuring the stability of the electrical contact of the electrode with the soil, by instrument design perfection. The task is achieved by using the information and technical system of operational monitoring of the soil environment of the structure to determine the conductive characteristics of the soil environment. The purpose of the research is to determine the critical loading at the loss of stability by thin-walled working electrodes made in the form of working electrodes of various shapes (thin-walled solid, three-spit and four-spindle discs with different thickness of the rim). The information and technical system of localoperational monitoring of agrobiological state of soil environment of different configurations with one-side compression.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2019, 8, 4; 42-49
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technologies of supporting decision in understanding conditions for projecting technological processes
Autorzy:
Brovarets, O. O.
Kovbasa, V. P.
Powiązania:
https://bibliotekanauki.pl/articles/411011.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Oddział w Lublinie PAN
Tematy:
information and technical system
local operational monitoring
soil
samples
variability
size
research
Opis:
Modern agriculture involves the implementation of a particular technological operation, according to the appropriate map-task, which is developed pre-based on diverse information. Knowledge of a certain structure of soil cover variability, obtained using information and technical systems of local operational monitoring of the agrobiological state of agricultural lands, allows us to adopt effective operational decisions for efficient managemen tagrobiological potential of agricultural lands. Obviously, under such conditions, there is a need for fundamentally new approaches to agricultural production, which is to ensure the proper quality of technological operations. The quality of the implementation of technological operations is an integral indicator of the efficiency of production of agricultural products within the agrobiological field. The necessary quality of implementation of the basic technological processes in plant growing is provided by the integrated information and technical systems of operational monitoring of the agrobiological state of agricultural lands. This opens new prospects for organic farming using such "smart" agricultural machines. In connection with this, the task is to obtain reliable data on the agrobiological state of the soil environment by reducing the error in determining the magnitude of the electrical conductive properties of the soil, providing individual stabilization of the working electrodes and the mechanism of lifting / lowering the working electrodes, copying inequalities of the soil environment, reducing the intensity of the destruction of the soil structure , self-cleaning of the working contact of the electrode and ensuring the stability of the electrical contact of the electrode with the soil, by instrument design perfection. The task is achieved by using the information and technical system of operational monitoring of the soil environment of the structure to determine the conductive characteristics of the soil environment. The purpose of this research is to determine the critical loading at the loss of stability by thin-walled working electrodes made in the form of working electrodes of various shapes (thin-walled solid, three-spit and four-spindle discs with different thickness of the rim). Information and technical system of local-operational monitoring of agrobiological state of soil environment of different configurations with one-side compression.
Źródło:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2019, 8, 3; 27-36
2084-5715
Pojawia się w:
ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the correctness of taking LPG samples from a dispenser pursuant to Company Standard ZN/MG/CN-18:2007, based on proficiency testing
Ocena poprawności pobierania próbek LPG z odmierzacza zgodnie z normą zakładową ZN/MG/CN-18:2007 na podstawie badań biegłości
Autorzy:
Bukrejewski, P.
Skolniak, M.
Grzeszczyk, M.
Powiązania:
https://bibliotekanauki.pl/articles/1363473.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
propane-butane
LPG
taking of fuel samples
fuel dispenser
proficiency testing
propan-butan
pobieranie
odmierzacz
badania biegłości
Opis:
The taking of samples is a very important stage in the process of preparing representative material for tests and obtaining reliable test results. The laboratories that strive for high quality of the services they offer should monitor their test results against the background of the results obtained by other reputable laboratories that provide similar services. In the pursuing of this objective, an excellent tool is the proficiency testing, which makes it possible to confirm the competence of laboratories to carry out fuel tests and/or to take fuel samples. The Automotive Industry Institute (PIMOT), as a leading body engaged in Poland in examining the quality of the propane-butane gas (LPG) used as a fuel, organized tests of the proficiency at taking LPG samples from a dispenser at a filling station. The tests were carried out for a number of laboratories that provided services within a similar scope. The laboratories participating in this project took fuel samples and sent them to the organizer for the samples to be tested and for the method of taking the LPG samples to be verified. In the article, the importance of taking the samples and of participating in the tests of proficiency at taking samples of liquefied propane-butane gas has been presented, the method of preparing representative material for tests and of verifying the homogeneity and stability of the batch under test has been described, and the approach to the examination of proficiency at taking LPG samples from a dispenser at a filling station has been discussed. The proficiency test results obtained from the participants have been presented, discussed, and analysed.
Pobieranie próbek jest bardzo istotnym etapem w procesie przygotowania reprezentatywnego materiału do badań i uzyskania miarodajnego wyniku. Laboratoria, które chcą zapewnić wysoką jakość oferowanych przez siebie usług, powinny monitorować uzyskiwane wyniki na tle innych renomowanych laboratoriów świadczących podobne usługi. W tym celu doskonałym narzędziem są badania biegłości umożliwiające potwierdzenie kompetencji laboratoriów do wykonywania badań i/lub pobierania próbek. Przemysłowy Instytut Motoryzacji, jako wiodąca jednostka badająca w Polsce jakość gazu propan – butan stosowanego jako paliwo, zorganizował badania biegłości pobierania LPG z odmierzacza stacji paliw. Uczestnikami były laboratoria świadczące usługi w podobnym zakresie. Uczestnicy pobierali próbki i przesyłali je do organizatora celem wykonania badań i sprawdzenia sposobu pobierania gazu LPG.W artykule opisano znaczenie pobierania próbek oraz uczestnictwa w badaniach biegłości z zakresu pobierania skroplonego gazu propan – butan, omówiono sposób przygotowania reprezentatywnego materiału badawczego, weryfikacji jednorodności i stabilności partii oraz omówiono podejście do badań biegłości z zakresu pobierania LPG z odmierzacza. W artykule przedstawiono wyniki badań biegłości uzyskane od uczestników i dokonano ich omówienia oraz analizy.
Źródło:
Archiwum Motoryzacji; 2017, 78, 4; 27-42
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Metodyka wyznaczania wybranych charakterystyk barwienia polietylenu z wykorzystaniem systemu CIELab
Methodology for determining selected characteristics of polyethylene dyeing using CIELab system
Autorzy:
Chorobiński, Mateusz
Skowroński, Łukasz
Bieliński, Marek
Powiązania:
https://bibliotekanauki.pl/articles/947562.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:
pomiar koloru
barwienie tworzyw
mieszanie tworzyw
dozowanie tworzyw
metodyka przygotowania próbek
color measurements
coloring of polymers
mixing of polymers
dosage of polymers
methodology of samples preparation
Opis:
Przedstawiono oryginalną metodę przygotowywania barwnych próbek z polietylenu, wykorzystaną do oceny zmiany barwy w skali CIELab, w wyniku zmieszania wybranych barwników. Do weryfikacji i oceny zmienności barwy serii próbek PE z udziałem czterech pigmentów (R, G, B, Y) wykorzystano spektrofotometr Cary 5000 rejestrujący widma odbiciowe odzwierciedlające efekt wzajemnego mieszania stosowanych w badaniach koncentratów barwiących.
The paper presents the original method for the preparation of polyethylene samples used to assess the color change in the CIELab scale, by using a mixture of selected dyes. In order to verify and evaluate the color variability of a series of PE samples with four pigments (magenta, blue, green, yellow), the Cary 5000 spectrophotometer was used for recording reflectance spectra of individual samples demonstrating the effect of mutual mixing of the dyeing concentrates used in the study.
Źródło:
Polimery; 2019, 64, 10; 690-696
0032-2725
Pojawia się w:
Polimery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zanieczyszczenie wybranych próbek stałych węglowodorami aromatycznymi przy trasach wylotowych z miasta Olecko
PAHs contamination in chosen samples taken from the Olecko region
Autorzy:
Chrząścik, Ireneusz
Szymalska, Magdalena
Kluska, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/1817556.pdf
Data publikacji:
2007-12-31
Wydawca:
Uniwersytet Kardynała Stefana Wyszyńskiego w Warszawie
Tematy:
próbki środowiskowe
sorpcja
węglowodory aromatyczne
environmental samples
sorption
PAHs
HPLC
Opis:
This paper presents the results of research conducted on some samples with soil and cabbage taken from the vicinity of Olecko town (Suwałki, Gołdapia, Ełk, Giżycko) and containing polycyclic aromatic hydrocarbons (PAHs) with 16 aromatic rings, the research is a continuation of a detailed monitoring of progressing pollution in the Olecko region, the samples were taken in August 2006 from the place situated 10 m from a road, this place was at the same time a cabbage plantation, the highest concentration of PAHs (750 pg/kg s. m.) was found in the sample taken close to the road from Olecko to Suwałki and in the sample with cabbage (313 pg/kg s. m.) taken near the road to Gołdapia. The lowest concentration of PAHs was stated in the samples taken in the vicinity of the road to Giżycko, the results don’t overpass the limits permitted in Poland but, unfortunately, are close to the upper limit of natural concentration defined by scientific literature.
Źródło:
Studia Ecologiae et Bioethicae; 2007, 5, 1; 295-304
1733-1218
Pojawia się w:
Studia Ecologiae et Bioethicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 87

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