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Tytuł:
The role of project management in business operation
Autorzy:
Janusz, A.
Powiązania:
https://bibliotekanauki.pl/articles/105858.pdf
Data publikacji:
2012
Wydawca:
Centrum Badań i Innowacji Pro-Akademia
Tematy:
management standard
regional development
tourism
standardy zarządzania
rozwój regionalny
turystyka
Opis:
The main objective of the study “The role of project management in the hospitality business operation” was to develop recommendations for the selection of project management standards which will allow the effective achievement of their objectives, in particular to define and adjust their management standards. The study was carried out in the period from 01/01 to 31/12/2011, while the fundamental phase of the study fell in the period from 01/08 to 30/11. A set of 5 specific objectives was used which were operationalized into 7 research questions and 5 research techniques, both quantitative and qualitative. The study used secondary data which constituted statistical and demonstrative material, as a result of which it was possible to develop a typology of projects implemented in hotel companies and compare project management standards. The above compilations were used to construct research tools in order to obtain primary data - the results of surveys and individual in-depth interviews. The study allowed the following main conclusions to be drawn: 1. The natural and cultural values of the region as well as regional and local tourist products are not perceived by hotel companies as attractive resources for creating their own offer. 2. Low propensity of hotel businesses to cooperate in integrating promotional activities for the region as an attractive tourist destination. 3. Low interest of hotel companies in the activities of sustainable development. 4. Low effectiveness of dialogue and cooperation between the hotel industry and other actors of the regional tourism market. 5. Moderate satisfaction of hotel companies with the implemented projects, there are no grounds to unequivocally state that the project was successful. 6. Hotels operating in the Łódź region conduct individual marketing activities on a small scale being focused exclusively on the promotion of their own offer. 7. Low propensity of hotel companies to establish cooperation within the tourism industry. 8. Hotel companies in the Łódź Voivodeship implement projects using few management standards. For these conclusions detailed recommendations were formulated indicating possible remedial actions aimed at reversing adverse trends or strengthening positive effects.
Źródło:
Acta Innovations; 2012, 4; [1-44]
2300-5599
Pojawia się w:
Acta Innovations
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The History of Saint Michael the Archangel Uniate Church in Rogóźno in the Light of the 18th Century Church Visitation
Historia parafii unickiej pw. św. Michała Archanioła w Rogóźnie w świetle XVIII-wiecznej wizytacji kościelnej
Autorzy:
Frykowski, Janusz A.
Powiązania:
https://bibliotekanauki.pl/articles/2038281.pdf
Data publikacji:
2016
Wydawca:
Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL
Tematy:
Rogóźno
parafia unicka
Kościół prawosławny
duchowieństwo parafialne
argentaria
beneficjum
Unici
Uniate parish
Orthodox church
parish priest
benefice
Uniates
Opis:
Praca przedstawia funkcjonowanie parafii unickiej pw. św. Michała Archanioła w Rogóźnie w 1. połowie XVIII wieku. We wstępie artykułu określono położenie geograficzne siedziby parafii, jej wielkość i miejsce w strukturach organizacyjnych Kościoła. Analizując protokoły powizytacyjne biskupów chełmskich, przedstawiono wygląd świątyni parafialnej i jej wyposażenie. W miarę możliwości określono wygląd plebanii i zabudowań gospodarczych. Następnie określono beneficjum cerkiewne. W dalszej części zwrócono uwagę na liczbę wiernych i ich duszpasterzy.
The following work depicts the operating of Saint Michael the Archangel Uniate Church in Rogóźno in the first half of the 18th century. The introduction contains the geographical location of the parish, its size and the place in the hierarchy of the Church. Having analyzed the Bishop of Chełm post-visitation protocols both the appearance of the church and church’s endowment is put forth. As far as possible, the appearance of the presbytery and auxiliary buildings has been determined. Then, not only was the church benefice determined but the number of the faithful and the clergy was defined.
Źródło:
Roczniki Teologiczne; 2016, 63, 4; 91-108
2353-7272
Pojawia się w:
Roczniki Teologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ASA-graphs for efficient data representation and processing
Autorzy:
Horzyk, Adrian
Bulanda, Daniel
Starzyk, Janusz A.
Powiązania:
https://bibliotekanauki.pl/articles/1838165.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
self balancing trees
self sorting trees
self aggregating data structures
associative structures
data access efficiency
representation of relationships
Opis:
Fast discovering of various relationships in data is an important feature of modern data mining, cognitive, knowledge-based, and explainable AI systems, including deep neural networks. The ability to represent a rich set of relationships between stored data and objects is essential for fast inferences, finding associations, representing knowledge, and extracting useful patterns or other pieces of information. This paper introduces self-balancing, aggregating, and sorting ASA-graphs for efficient data representation in various data structures, databases, and data mining systems. These graphs are smaller and use more efficient algorithms for searching, inserting, and removing data than the most commonly used self-balancing trees. ASA-graphs also automatically aggregate and count all duplicates of values and represent them by the same nodes, connecting them in order, and simultaneously providing very fast data access based on a binary search tree approach. The proposed ASA-graph structure combines the advantages of sorted lists, binary search trees, B-trees, and B+trees, eliminating their weaknesses. Our experiments proved that the ASA-graphs outperform many commonly used self-balancing trees.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2020, 30, 4; 717-731
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cytological and genetic evaluation of anther culture-derived doubled haploids in barley
Autorzy:
Szarejko, I
Falk, D E
Janusz, A
Nabialkowska, D
Powiązania:
https://bibliotekanauki.pl/articles/2046612.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cytological analysis
doubled haploid
morphological variation
genotype
barley
genetic evaluation
gametoclonal variation
chlorophyll mutation test
Hordeum vulgare
anther culture
Opis:
Gametoclonal variation among anther culture-derived plants of three barley genotypes was estimated on the basis of cytological analysis (DH1, DH2 generation), observation of morphological variants (DH2, DH3) and chlorophyll mutation test (DH2, DH3). Individual head rows were grown in the field to detect possible chimeric structure of regenerants and to assess the number of variants and mutations in each line. Spontaneously doubled plants were the most frequent class (70%) among regenerants and almost 90% of them were completely fertile. There was a difference in proportion of haploids produced by different genotypes, but the highest frequency observed did not exceed 21%. The remaining regenerants were tetraploid, and contained chromosomal mutations or chimeras. In total, there were about 15% of polyploids and plants carrying chromosomal aberrations (translocations, inversions) among DH1 individuals. The changes in chromosome number and structure were the main source of observed variation. The level of gene mutation induced in vitro was relatively low. No more than 1% of microspore-derived plants expressed visible morphological changes in DH2 progeny. Only two morphological variants derived from the Bruce cultivar proved to be homozygous mutants (dwarf type) stable up the to third generation. The frequency of DH plants carrying chlorophyll mutation was 5.8%, but most of them (82%) were chimeric and had only a small mutation sector. The level of gametoclonal variation depended on the donor plant genotype. The highest proportion of variants and mutations was observed among DH plants derived from the Bruce cultivar, while the lowest was recorded among plants regenerated from anther culture of the doubled haploid line H930-36. Mechanisms leading to the observed variation and implications resulting from the presented experiments concerning implementation of anther culture in barley breeding were discussed. It was concluded that this method resulted in a high frequency of spontaneous doubling, a low frequency of genetic changes, and being less time and effort-consuming than the ’Bulbosum’ technique, can be applied to most barley breeding programs.
Źródło:
Journal of Applied Genetics; 1997, 38, 4; 437-452
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Outcome of Targeted Therapy in Advanced Gastrointestinal Stromal Tumors (Gist) with Non-Exon 11 Kit Mutations
Autorzy:
Osuch, Czesław
Rutkowski, Piotr
Brzuszkiewicz, Karolina
Bylina, Elżbieta
Limon, Janusz
Siedlecki, Janusz A.
Powiązania:
https://bibliotekanauki.pl/articles/1395799.pdf
Data publikacji:
2014-07-01
Wydawca:
Index Copernicus International
Tematy:
GIST
KIT mutations
imatinib
Opis:
GIST is the most common mesenchymal tumour of gastrointestinal tract arising from mutation of KIT or PDGFRA gene. Surgery is the primary method of treatment, however a targeted therapy with imatinib is necessary due to recurrence. The aim of the study was to evaluate efficacy of the targeted chemotherapy in advanced gastrointestinal stromal tumours with non-exon 11 KIT mutations. Material and methods. Data from 279 patients with advanced GIST treated with imatinib between 2001 and 2011 were analysed in the study. Exon 11 KIT mutation was found in 192 patients (68.7%), non-exon 11 KIT mutation was found in 87 patients (31.3%): this group included lack of mutation - wild-type, exon 9 KIT mutations, exon 18 PDGFRA D842V mutations, non-D842V PDGFRA mutations as well as non-exon 9 and 11 KIT mutations. Analysis of progression-free survival and overall survival were done for the entire group of patients and for patients with particular mutations, and then effects on progression-free survival and overall survival of such factors as sex, age, imatinib dose were evaluated. Results. Occurrence of non-exon 11 KIT mutation increases the risk of disease progression by 20% in comparison to the presence of exon 11 KIT mutation, however it does not increase the risk of patient’s death. Percentage of 5-year progression-free survivals is the greatest in the case of PDGFRA mutation other than D842V mutation. Percentage of 5-year survivals in case of the presence of D842V PDGFRA mutation is more than twice worse than in the case of the other mutations. Lesion location in the gastrointestinal tract affected the risk of death, with the greatest percentage of 5-year survival for lesions located in the stomach. Such factors as sex, age at diagnosis (<50, ≥50 years) and imatinib dose did not affect the risk of disease progression and the risk of patient’s death. Conclusions. The ratio of overall survival of patients with advanced GIST with a mutation other than exon 11 KIT mutation treated with imatinib is similar to the ratio of overall survival of patients with GIST with exon 11 KIT mutation. An exception is the group of patients with GIST in whom the presence of D842V PDGFRA mutation was found. In general, longer survival has been found in patients with GIST located in the stomach in comparison to the small intestine or other less frequent locations. Percentage of 5-year progression-free survivals is the greatest in the case of PDGFRA mutation other than D842V mutation.
Źródło:
Polish Journal of Surgery; 2014, 86, 7; 325-332
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of membrane performance in the separation of carbon dioxide
Autorzy:
Tanczyk, M.
Warmuziński, K.
Janusz-Cygan, A.
Jaschik, M.
Powiązania:
https://bibliotekanauki.pl/articles/185597.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
produkcja wodoru
proces hybrydowy
proces membranowy
hydrogen production
hybrid process
pressure swing adsorption
membrane process
Opis:
HY2SEPS was an EU-funded project directed at the reduction of C02 emissions. The principal objective of the project was to develop a hybrid membrane-adsorptive H2/C02 separation technique that would form an integral element of the pre-combustion process. Specific tasks included the derivation of simplified mathematical models for the membrane separation of H2/C02 mixtures. In the present study one of the developed models is discussed in detail, namely that with the countercurrent plug flow of the feed and the permeate. A number of simulations were carried out concerning the separation of binary mixtures that may appear following steam conversion of methane. The numerical results were then compared with the experimental data obtained by FORTH/ICEHT. The estimated fluxes of pure C02, H2, CH4 and N2 are shown alongside those measured experimentally as a function of temperature and C02 partial pressure in Figs 2 - 7. It is concluded that, in general, C02 flux increases monotonically with both temperature and C02 partial pressure. It is also found that the fluxes of hydrogen, methane and nitrogen reach a minimum at a temperature slightly above 323 K. Overall, a good agreement was obtained between the simulations and experiments.
Źródło:
Chemical and Process Engineering; 2011, 32, 4; 291-298
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The separation of carbon dioxide from CO2/N2/O2 mixtures using polyimide and polysulphone membranes
Autorzy:
Jaschik, M.
Tańczyk, M.
Janusz-Cygan, A.
Wojdyła, A.
Warmuziński, K.
Powiązania:
https://bibliotekanauki.pl/articles/185496.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
membrane separation
modified polyimide
modified polysulphone
CO2 capture
separacja membranowa
wychwytywanie CO2
Opis:
Results are presented concerning the separation of the mixtures of carbon dioxide, nitrogen and oxygen in membrane modules with modified polysulphone or polyimide as active layers. The feed gas was a mixture with composition corresponding to that of a stream leaving stage 1 of a hybrid adsorptivemembrane process for the removal of CO2 from dry flue gas. In gas streams containing 70 vol.% of CO2, O2 content was varied between 0 and 5 vol.%. It is found that the presence of oxygen in the feed gas lowers the purity of the product CO2 in all the modules studied, while the recovery depends on the module. In the PRISM module (Air Products) an increase in O2 feed concentration, for the maximum permeate purity, led to a rise in CO2 recovery, whereas for the UBE modules the recovery did not change.
Źródło:
Chemical and Process Engineering; 2018, 39, 4; 449--456
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Natural gas economy in the United States and European markets
Gospodarka gazem ziemnym na rynku amerykańskim i europejskim
Autorzy:
Szurlej, A.
Janusz, P.
Powiązania:
https://bibliotekanauki.pl/articles/216204.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
gaz ziemny
niekonwencjonalne złoża gazu
gaz z łupków
LNG
liberalizacja
natural gas
unconventional gas
shale gas
liberalisation
Opis:
W latach 2001–2012 międzynarodowy obrót gazem ziemnym zwiększył się o 86,4%, przy czym zauważalny jest stopniowy wzrost znaczenia technologii LNG. W 2005 r. udział przypadający na LNG w całkowitym obrocie stanowił 26%, a w 2012 r. – 32%. Światowe zużycie gazu ziemnego w 2012 r. w porównaniu do roku poprzedniego zwiększyło się o około 2% i osiągnęło 3,3 bln m3. W Ameryce Północnej odnotowano znaczący wzrost zużycia – 27,5%, natomiast w przypadku krajów UE zauważalny jest spadek konsumpcji tego paliwa – 2,3%. Autorzy przedstawili zmianę udziału gazu ziemnego w strukturze zużycia energii pierwotnej na rynku europejskim oraz amerykańskim, zauważalne jest umocnienie się roli tego surowca energetycznego w przypadku rynku amerykańskiego (2011 r. – 28,3%; 2012 r. – 30,0%) oraz lekki spadek w Europie (2011 r. – 24,2%; 2012 r. – 23,9%). Artykuł przedstawia ponadto zmiany jakie nastąpiły w obszarze uzależnienia od importu gazu na rynku amerykańskim (spadek importu gazu ziemnego dzięki zagospodarowaniu niekonwencjonalnych złóż gazu) oraz europejskim (spadek pozyskania gazu ze z własnych złóż, wzrost znaczenia importu gazu, w tym LNG). Ponadto przedstawiono zmiany cen gazu ziemnego na rynku europejskim, amerykańskim oraz ceny LNG dostarczanego do Japonii, a także zaprezentowano i skomentowano tendencje zmian cen gazu ziemnego dla odbiorców przemysłowych i gospodarstw domowych w USA, Kanadzie (znaczący wpływ na spadek cen miała „rewolucja łupkowa”) i wybranych państwach UE. Zaprezentowano i omówiono wpływ zmian na globalnym rynku gazu ziemnego na sektor gazowy w Polsce w ciągu ostatnich lat. Przybliżono także podejmowane działania w zakresie stworzenia konkurencyjnego rynku gazu ziemnego w Polsce.
From 2001–2012, international trade in natural gas increased by 86.4%, with LNG technology visibly growing in importance. In 2005, the share of LNG in the total turnover accounted for 26%, while in 2012 for 32%. In 2012, global natural gas consumption, compared to the previous year, increased by 2%, reaching 3,3 bcm. North America recorded a significant increase of 27.5% in the consumption of gas, whereas in EU countries the consumption of this fuel decreased by 2.3%. This paper examines how the share of natural gas in primary energy consumption has changed in the European and American markets; the role of this energy source has been strengthening in the US market (28.3% in 2011; 30.0% in 2012) while showing a slight decline in Europe (24.2% in 2011; 23.9% in 2012). The analysis also presents the changes that occurred in terms of dependency on gas imports in the US market, with natural gas imports decreasing due to the development of unconventional gas deposits. In comparison, in the European market lower gas recovery from domestic reserves has meant increased importance of gas imports, including LNG. The paper presents changes in natural gas prices in the European and American markets, along with the prices of LNG delivered to Japan. In addition, it reviews trends in natural gas prices for industrial consumers and households in Canada and the United States (where the ‘shale revolution’ has significantly affected a drop in prices), as well as in selected EU countries. Finally, the impact in recent years of the global natural gas market on the gas sector in Poland is examined. Highlighted are the actions undertaken to establish a competitive gas market.
Źródło:
Gospodarka Surowcami Mineralnymi; 2013, 29, 4; 77-94
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extensible, fast and secure scala expression evaluation engine
Autorzy:
Janik, A.
Janusz, R.
Powiązania:
https://bibliotekanauki.pl/articles/385003.pdf
Data publikacji:
2017
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
expression evaluation engine
Scala
Opis:
Scripting and expression evaluation engines are popular tools in the Java software ecosystem which is understood as any environment using Java Virtual Machine (JVM) to execute code (which does not have to be generated from Java language). With the current, wide-spread popularity of Java and Java byte code compliant languages it means that both: traditional, stand-alone Java programs as well as enterprise systems run on application servers or even systems deployed in microservices architecture can be considered. Expression evaluation engines are often used for purposes like defining document templates, enhancing various static configuration formats with dynamically evaluated snippets or defining data binding for user interfaces. However, most of these solutions employ dynamically typed languages and suffer from limited performance and lack of any concern for security. This effectively makes it impossible to use expression language as a feature exposed to end users. This paper presents a new approach to implementing an expression engine. It uses Scala as the expression language and leverages its static type system as well as its rich feature set to create an expression evaluation engine with expressive and concise language, high evaluation performance and fine grained security control. In the paper we present use case built for the domain of telecommunication networks. In large telecommunication networks one can find hundreds of devices for which configuration has to be updated either periodically or on-demand when a given event occurs. Contents of configuration files may have to be generated dynamically (based on some data associated with a given device). On top of that, since communicatinon networks are heterogeneous environments with hardware delivered by different providers, exact form of each config file may vary depending on a type of a device and its manufacturer. Moreover, as structure and size of telecommunication networks evolve as new devices are added, there is a need to dynamically and remotely support completely new types of devices with a completely new format of configuration. This paper presents how the problem can be solved by using configuration file templates with placeholders that would be filled by some data associated with a given device. Each template is an expression that evaluates to exact configuration file. Performance is crucial (due to size of network) and so is security: the solution should allow to control what kind of configuration and by whom may be applied to devices while still allowing network operators to use a Graphical User Interface to define (or redefine) configuration file templates.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2017, 11, 3; 30-44
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Post-Pandemic Marketing @Marketing
Autorzy:
Kretek, Henryk A.
Dworak, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/2064915.pdf
Data publikacji:
2020
Wydawca:
STE GROUP
Tematy:
marketing
advertising
interview
questionnaire
Opis:
Marketing concentrates mainly on customer acquisition by means of advertisements broadcast in mass media and on billboards. The change to be made in traditional marketing is the shift of interests from satisfying needs to meeting expectations. @Marketing may serve as a tool for that. The aim of this paper is to present a new concept for @marketing, based on innovative forms of product presentation. The paper focuses on the marketing content, without consideration of technical aspects. Research has been carried out in the field of customers’ expectations towards online presentations. In the new conditions, a product presentation should be expanded by innovative forms such as narration, photography and computer graphics. Therefore, there is a need to develop comprehensive projects for planning online presentations as soon as possible. It should be preceded by detailed analyses carried out by IT specialists and marketing experts.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2020, 3, 1; 584--595
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Role of underground gas storage in the EU gas market
Autorzy:
Janusz, P.
Kaliski, M.
Szurlej, A.
Powiązania:
https://bibliotekanauki.pl/articles/299269.pdf
Data publikacji:
2014
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
natural gas
underground gas storage
Opis:
One of the main intentions of the European Union is to create common and liberalizated market of natural gas in Europe. Actions has been taken in this area for a few years, however achived effects do not reach the aims that were assumed at the beginning. The quantity of natural gas consumption in the European Union during last years is characterized by a declining tendency (decreasing usage of natural gas in power sector, higher temperature during autumn and winter season also infulences on limiting of natural gas demand), in 2012 the consumption was forming on the level of 444 billion m3, and for example in 2008 it amounted to 497 billion m3. The regulations concerning the natural gas market embrace all of the elements which have an impact on building consolidated and liberalizated market, it means: transfer, distribution and LNG, storage. The authors of this article wants to draw one's attention to the particular role of underground gas storages and depict change of the tasks, which they have to fulfill on the liberalizating market of natural gas in Europe (ie. Price arbitration). The purpose of this article is to presentthe current situation on the market of storage services, which means available storage capacities, the level of their usage and plans regarding extension and constructing of new capacities.
Źródło:
AGH Drilling, Oil, Gas; 2014, 31, 1; 11-23
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An analysis of the changes of the composition of natural gas transported in high-pressure gas pipelines
Autorzy:
Janusz, P.
Liszka, K.
Łaciak, M.
Oliinyk, A.
Susak, A.
Powiązania:
https://bibliotekanauki.pl/articles/299187.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
natural gas
transmission system
Opis:
Natural gas is one of the major fuels covering home demand for energy. Natural gas consumption has been observed to systematically increase over the last five years. Intensive works are conducted on the development of the national gas network leading to the diversifi cation of directions and sources of blue gas. Natural gas consists of various components. Its composition depends on the source of origin and has a decisive influence on thermodynamic and hydraulic properties. The content of heavy hydrocarbon gases increases the calorific value of the gaseous fuel, whereas the high content of inorganic components lowers the amount of energy obtained in the course of natural gas combustion, and environmentally hazardous chemical compounds are formed. As far as gas transport is concerned, too high content of heavy hydrocarbon gases (propane, butane, pentane) is disadvantageous. In high pressure conditions the C3-C5 class gases change to a liquid phase. This results in the change of the calorific value, lower hydraulic efficiency of the pipeline diameter and potentially faster corrosion processes on the inner surface of the pipeline.This paper is aimed at presenting results of changes of natural gas composition in a function of distance at which the fuel is transported. The respective analyses will be conducted with the use of analytical methods and commercial pipeline simulators.
Źródło:
AGH Drilling, Oil, Gas; 2015, 32, 4; 713-722
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Membrane separation of carbon dioxide in the integrated gasification combined cycle systems
Autorzy:
Kotowicz, J.
Skorek-Osikowska, A.
Janusz-Szymańska, K.
Powiązania:
https://bibliotekanauki.pl/articles/240308.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
IGCC
separacja membranowa
CCS
membrane separation
Opis:
Integrated gasification combined cycle systems (IGCC) are becoming more popular because of the characteristics, by which they are characterized, including low pollutants emissions, relatively high efficiency of electricity production and the ability to integrate the installation of carbon capture and storage (CCS). Currently, the most frequently used CO2 capture technology in IGCC systems is based on the absorption process. This method causes a significant increase of the internal load and decreases the efficiency of the entire system. It is therefore necessary to look for new methods of carbon dioxide capture. The authors of the present paper propose the use of membrane separation. The paper reviews available membranes for use in IGCC systems, indicates, inter alia, possible places of their implementation in the system and the required operation parameters. Attention is drawn to the most important parameters of membranes (among other selectivity and permeability) influencing the cost and performance of the whole installation. Numerical model of a membrane was used, among others, to analyze the influence of the basic parameters of the selected membranes on the purity and recovery ratio of the obtained permeate, as well as to determine the energetic cost of the use of membranes for the CO2 separation in IGCC systems. The calculations were made within the environment of the commercial package Aspen Plus. For the calculations both, membranes selective for carbon dioxide and membranes selective for hydrogen were used. Properly selected pressure before and after membrane module allowed for minimization of energy input on CCS installation assuring high purity and recovery ratio of separated gas.
Źródło:
Archives of Thermodynamics; 2010, 31, 3; 145-164
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 25

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