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Tytuł:
My City Dashboard: Real-time Data Processing Platform for Smart Cities
Autorzy:
Usurelu, C.-C.
Pop, C.
Powiązania:
https://bibliotekanauki.pl/articles/307785.pdf
Data publikacji:
2017
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
big data
data analytics
real-time processing
smart cities
statistics
Opis:
In recent years, with the increasing popularity of IoT, the rapid growth of smartphone usage enabled by the increase adoption of Internet services and the continuously decreasing costs of these devices and services has led to a huge increase in the volume of data that governments can use in the context of smart city initiatives. The need for analytics is becoming a requirement for smart city projects such as city dashboards to provide citizens with an easy to understand overview of the city. As such, data should be analyzed, reduced and presented in such a way that citizens can easily understand various aspects of the city and use this information to increase quality of life. In this paper, we firstly present the context and the start of the design and implementation of proposed solution for real-time data processing in smart cities, mainly an analytics processing pipeline and a dashboard prototype for this solution, named My City Dashboard. We focus on high scalability and modularity of this platform.
Źródło:
Journal of Telecommunications and Information Technology; 2017, 1; 89-100
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the Radical Nitration of Isooctane Fuel via Nitromethane Propellant
Autorzy:
Bayar, C. C.
Powiązania:
https://bibliotekanauki.pl/articles/358270.pdf
Data publikacji:
2018
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
nitromethane
isooctane
nitration
specific impulse
Dunning basis sets
Opis:
The possible radical nitration reactions of isooctane fuel with nitromethane propellant, which is generally used as an additive in fuel formulations, were thermodynamically investigated both at room temperature and at a higher temperature of 691.15 K. The temperature of 691.15 K was chosen because it is the auto-ignition temperature of isooctane and nitromethane and has the potential to mimic better engine conditions. The computational calculations were performed at the theoretical level of DFT UB3LYP/cc-pVDZ. Four different nitration reactions and nitrated products were considered and interpreted in detail. The most and the least favorable nitrations were observed at the primary and secondary carbons of isooctane at 691.15 K, respectively. Four of the designated reactions were endothermic at this temperature. The other outcome of this study was that there was a direct relationship between the thermodynamic tendencies of the considered reactions and the ballistic performances (detonation velocities, detonation pressures, and specific impulses) of their nitrated products. The thermodynamic properties of heats of combustion and deflagration temperatures were calculated via empirical formulations based on the stoichiometry and some other structural parameters of the energetic materials. The results for nitromethane and the nitro-isooctane products were examined.
Źródło:
Central European Journal of Energetic Materials; 2018, 15, 2; 225-242
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Багатовекторна зовнішня політика Узбекистану як важливий засіб вирішення соціально-економічних проблем країни
Multi-vector Foreign Policy of Uzbekistan as an Important Means of Solving the Socio-economic Problems of the Country
Autorzy:
Фомін, C.C.
Powiązania:
https://bibliotekanauki.pl/articles/22676689.pdf
Data publikacji:
2021-12-16
Wydawca:
National Academy of Sciences of Ukraine. Institute of World History
Tematy:
демографічна проблема
безробіття
трудова міграція
екологічна проблема
багатовекторна зовнішня політика
євразійська економічна інтеграція
зона вільної торгівлі
економічний союз
протекціонізм
demographic problem
unemployment
labour migration
ecological problem
multi-vector foreign policy
Eurasian economic integration
free trade area
economic union
protectionism
Opis:
В статті окреслені внутрішні проблеми Узбекистану, серед яких слід назвати проблему бідності, масового безробіття, нестачі сільськогосподарської землі і водних ресурсів, екологічні проблеми. Значною мірою ці проблеми обумовлені швидким зростанням населення. Узбекистан намагається  вирішити ці проблеми шляхом ліберальних ринкових реформ та багатовекторної зовнішньої політики, розвиваючи одночасно політичні та торгово-економічні відносини з різними країнами, зокрема, з Китаєм, США, Євросоюзом, Туреччиною, Південною Кореєю, Росією та іншими країнами-членами Євразійського економічного союзу (ЄАЕС). В статті показано, що обсяги торгівлі Узбекистану із західними країнами, а також обсяги західних інвестицій в економіку цієї країни в цілому залишаються, принаймні зараз, невисокими. Робиться висновок, що для США Узбекистан є цікавим головним чином в геополітичному і військово-стратегічному аспектах, особливо зараз, після виводу американських військ із Афганістану. ЄС значно більше, ніж США, зацікавлений в розвитку торгово-економічних відносин з Узбекистаном. Нова угода між Узбекистаном і ЄС про розширене партнерство і співробітництво створить більш сприятливі умови для економічного співробітництва і торгівлі, зростання європейських інвестицій в економіку Узбекистану. Проте, здається, що фактор географічної віддаленості Узбекистану від Європи не дасть можливості країнам Євросоюзу займати таке ж провідне місце в зовнішньоекономічних відносинах Узбекистану, яке зараз займають сусідні Китай, Росія та інші країни-члени ЄАЕС. Показано, що найважливішим торгово-економічним партнером Узбекистану є Китай, який розглядає Узбекистан як важливу транзитну країну, через територію якої проходять транспортні коридори для транспортування, перш за все, китайських товарів в країни Європи та інші регіони світу. Китайські інвестиції в економіку Узбекистану невпинно зростають. Євразійський економічний союз (ЄАЕС), зокрема, такі його члени як Росія і Казахстан, також є для Узбекистану найважливішим торгово-економічним партнером. Крім того, Росія є головним ринком праці для мільйонів узбецьких трудових мігрантів. В межах ЄАЕС був створений єдиний ринок праці, трудові мігранти-громадяни країн-членів ЄАЕС користуються соціальними правами країни перебування та можуть вільно пересуватися територією країн-членів ЄАЕС. Ця обставина особливо важлива для Узбекистану, який зацікавлений в покращенні умов перебування своїх трудових мігрантів. Крім того, як свідчать факти, економічна інтеграція в межах ЄАЕС не перешкоджає урядам країн-членів ЄАЕС розвивати інтенсивні політичні і економічні відносини з різними країнами. Враховуючи всю низку гострих соціально-економічних, екологічних і демографічних проблем, які стоять перед Узбекистаном, думається, що в майбутньому неможливо повністю виключати членство Узбекистану в ЄАЕС, особливо, якщо таке членство не завадить узбецькому керівництву й надалі проводити багатовекторну зовнішню політику. Парламент Узбекистану схвалив рішення брати участь в роботі ЄАЕС в якості спостерігача. В грудні 2020 р. ЄАЕС надав Узбекистану такий статус.
The article elucidates the internal problems of Uzbekistan among which one should mention the problem of poverty, mass unemployment, shortage of arable land and water resources, serious ecological problems. To a high degree these problems have been caused by a rapid growth of population. Uzbekistan tries to solve these problems by means of liberal market reforms and the multi-vector foreign policy developing political, economic and trade relations at the same time with different countries, in particular with China, the USA, the EU, Turkey, South Korea, Russia and other countries-members of the Eurasian Economic Union (EAEU). It was shown that volumes of trade of Uzbekistan with the Western countries as well as the level of Western investments remain at least now not high. The conclusion is drawn that for the USA Uzbekistan presents the interest mainly in geopolitical, military and strategic aspects, especially now after the US troops left Afghanistan. The EU is more than the USA interested in developing the trade and economic relations with Uzbekistan. The new agreement between Uzbekistan and the EU on enlarged partnership and cooperation will create more favorable conditions for economic cooperation and trade, growth of European investments into economy of Uzbekistan. Nevertheless it seems that the factor of geographic remoteness of Uzbekistan from Europe will not make it possible for the EU countries to occupy the same place in external economic links of Uzbekistan as the countries-neighbours such as China, Russia and other countries-members of the EAEU. It is shown that China is the most important trade and economic partner of Uzbekistan. China considers Uzbekistan as the important transit country with transport corridors indispensable for transportation first of all of Chinese goods to the countries of Europe and other regions of the world. The Chinese investments into economy of Uzbekistan are constantly growing. The Eurasian Economic Union (EAEU), in particular Russia and Kazakhstan, is also the most important trade and economic partner of Uzbekistan. Besides, Russia is the biggest labour market for millions of Uzbek migrant workers. Within the EAEU the common labour market was created, migrant workers who are citizens of the countries-members of the EAEU enjoy the social rights of the country of stay and may freely move over territories of the countries-members of the EAEU. This fact is especially important for Uzbekistan which is interested in improving living conditions of its migrant workers. Besides, as the facts show, the economic integration within the EAEU does not prevent the governments of the countries-members of the EAEU from developing intensive political and economic relations with different countries. Taking into account the complex of acute socio-economic, ecological and demographic problems facing Uzbekistan it seems that in the future one cannot completely exclude the possibility of membership of Uzbekistan in the EAEU especially if such a membership does not prevent the Uzbek government from pursuing the multi-vector foreign policy. The parliament of Uzbekistan approved the decision to obtain the status of observer at the EAEU. The EAEU granted this status to Uzbekistan in December 2020.
Źródło:
Проблеми всесвітньої історії; 2021, 16; 175-195
2707-6776
Pojawia się w:
Проблеми всесвітньої історії
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Key factors contributing to simultaneous nitrification-denitrification in a biological aerated filter system using oyster shell medium
Autorzy:
Hwang, C.-C.
Weng, C.-H.
Powiązania:
https://bibliotekanauki.pl/articles/208226.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
waste water
dissolved oxygen
oxidation
reactors
anammox
COD
nitryfikacja
ścieki
utlenianie
filtry biologicznie aktywne
CHZt
Opis:
Factors contributing to nitrogen removal in a biological aerated filter (BAF) using oyster shell medium have been investigated. The system was operated in parallel with a bio-ball filter. Both filters were fed with a synthetic domestic wastewater containing approximately 25 mg N/dm3 of total nitrogen (TN). The COD of wastewater was 200 mg O2/dm3. The sizes and dissolved oxygen (DO) of the voids within both filters were measured. Results indicated that the oyster shell system performed better with a nitrogen removal of 64.3%. The two systems exhibited a similar COD removal efficiency of approximated 80%. The oyster shell filter showed higher degree of variability in both sizes and DO levels of its void spaces. The condition provided a favorable environment for nitrogen removal through simultaneous nitrification and denitrification (SND). The release of carbonates from oyster shells were minimal, as judged from mass balance analysis of the system using calcium. It is concluded that the function of a SND reactor can be enhanced by using non-uniform filter media such as oyster shells. On the other hand, alkalinity is not a major concern when treating wastewaters with moderate ammonia concentration, such as that of domestic wastewaters.
Źródło:
Environment Protection Engineering; 2017, 43, 1; 75-86
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Próby poszukiwania rzęsitka pochwowego w narządach płciowych wewnętrznych u kobiet
Attempts of searching T. vaginalis in the internal genital organs of woman
Popytki obnaruzhenija vlagalishhnojj trikhomonady vo vnutrennikh polovykh organakh u zhenshhin
Autorzy:
Zwierz, C.
Klyszejko, C.
Powiązania:
https://bibliotekanauki.pl/articles/838160.pdf
Data publikacji:
1964
Wydawca:
Polskie Towarzystwo Parazytologiczne
Opis:
The authrs examined the oviducts of women treated operatively in the IInd Clinic of Obstetrics and Gynecology, Medical School, Gdańsk, who exhibited a long-standing trichornonadosis, for the presence of T. vaginaiis. During the gynecologic operation, the oviducts were removed and placed on the Pawłowa medium wilh the incubalion at 37°; after 48 hours the fluid was centrifuged, the sediment placed on another medium and examined under microscope. The oviduct was flushed with buffor used for Pawłowa medium, precipitated, and centrifuged, transferring the sediment on Pawłowa medium. The cultures were checked after 24,48 and 72 hours. Among 4 women, in whom oviduct cultures were made, 2 showed positive results. In one case an isolated strain could be maintained through several passages, in the other, single degenerated, poorly motile forms of the protozoon were found after 24 hours, which disappeared completely in the next passages.
Źródło:
Annals of Parasitology; 1964, 10, 2-3
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temporal predictive regression models for linguistic style analysis
Autorzy:
Klaussner, C.
Vogel, C.
Powiązania:
https://bibliotekanauki.pl/articles/103873.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Instytut Podstaw Informatyki PAN
Tematy:
language change
style analysis
regression
Opis:
This study focuses on modelling general and individual language change over several decades. A timeline prediction task was used to identify interesting temporal features. Our previous work achieved high accuracy in predicting publication year, using lexical features marked for syntactic context. In this study, we use four feature types (character, word stem, part-of-speech, and word n-grams) to predict publication year, and then use associated models to determine constant and changing features in individual and general language use. We do this for two corpora, one containing texts by two different authors, published over a fifty-year period, and a reference Corpus containing a variety of text types, representing general language style over time, for the same temporal span as the two authors. Our linear regression models achieve good accuracy with the two-author data set, and very good results with the reference corpus, bringing to light interesting features of language change.
Źródło:
Journal of Language Modelling; 2018, 6, 1; 175-222
2299-856X
2299-8470
Pojawia się w:
Journal of Language Modelling
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New insights into the origin and relationships of blastoid echinoderms
Autorzy:
Paul, C.R.C.
Powiązania:
https://bibliotekanauki.pl/articles/2082286.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Blastozoa
Glyptocystitoida
Hemicosmitoida
Coronata
Blastoidea
homology
phylogeny
ontogeny
Opis:
“Pan-dichoporites” (new informal term) is proposed to unite Cambrian blastozoans, such as Cambrocrinus, Ridersia, and Sanducystis, glyptocystitoid and hemicosmitoid rhombiferans, coronates, blastoids, and Lysocystites. Pan-dichoporite ambulacra have double biserial main axes with brachiole facets shared by pairs of floor (glyptocystitoids), side (blastoid) or trunk (hemicosmitoids, coronates) plates. These axial plates are the first two brachiolar plates modified to form the ambulacral axes. In glyptocystitoids the first brachiole facet in each ambulacrum is shared by an oral and another plate. Hence, these are also two modified brachiolar plates and part of the axial skeleton under the Extraxial Axial Theory (EAT). Pan-dichoporites are also characterized by thecae composed of homologous plate circlets. The unique glyptocystitoid genus Rhombifera bears ambulacral facets on five radial plates, which alternate with five orals. The oral area of Lysocystites (blastoid sensu lato) is very similar, which suggests that rhombiferan radials are homologous with “ambulacrals” of Lysocystites and hence with blastoid lancet plates. This implies derivation of blastoids from glyptocystitoids and suggests that blastoid and coronate radials and deltoids are homologous with rhombiferan infralaterals and laterals. Thus, homologous plate circlets occur in all pan-dichoporites, which strengthens the validity of a pan-dichoporite clade. Under Universal Elemental Homology (UEH), deltoids were homologized with rhombiferan orals, but this is inconsistent with the EAT. Deltoids bear respiratory pore structures and so are perforate extraxial skeletal plates, whereas rhombiferan orals are axial skeleton. The new plate homologies also explain why only five plates form the oral frames of coronates, blastoids and Lysocystites, whereas glyptocystitoids (except Rhombifera) have six oral frame plates; all glyptocystitoids have only five laterals. Hemicosmitoids arose by paedomorphic ambulacral reduction, but the paedomorphosis also affected the thecal plates and stem. Paedomorphosis poses special problems for cladistic character analysis, since the new characters often appear to be plesiomorphic.
Źródło:
Acta Palaeontologica Polonica; 2021, 66, 1; 41-62
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Impact of Family and Job Content on Swedish Seafarers’ Occupational Commitment – A Gendered Issue?
Autorzy:
Hult, C.
Österman, C.
Powiązania:
https://bibliotekanauki.pl/articles/116143.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Swedish Seafarers
job content
Crew Resource Management
Seafarers’ Occupational Commitment
women on board
gender
Gendered Issue
Maritime Labour Convention
Opis:
Ongoing research has indicated important effects on seafarers’ occupational commitment due to gender and family situation. In this study, these findings have been elaborated further by controlling for the effect of perceived work content. Statistical analyses were employed, using a survey material of Swedish seafarers collected from a national register in 2010. The results showed that the effect on occupational commitment of having children at home is strongly positive and statistically significant for women. However, the significance was dependent on the level of satisfaction with the job content. It was suggested that the seafaring occupation could be viewed as a cooping strategy, although only appropriate if the job content is agreeable. Another important family effect was, as expected, the positive effect of having a relative working, or having worked, at sea. This effect was, however, only significant for male seafarers in the age group below the early 40’s. It was concluded that this effect is mainly emotionally driven and not particularly influenced by the actual job content. The results further showed that working in the catering department comes with a strong negative effect on commitment to the seafaring occupation for women. This effect, however, lost its significance after control for job content. It was concluded that the effect of satisfaction with job content on occupational commitment is generally important, with the exception of women, without children, working in the catering department.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2016, 10, 1; 27-34
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficient algorithms for minimal disjoint path problems on chordal graphs
Autorzy:
Gopalakrishnan, C.
Satyan, C.
Pandu Rangan, C.
Powiązania:
https://bibliotekanauki.pl/articles/972049.pdf
Data publikacji:
1995
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
chordal graph
minimal paths
disjoint paths
clique
bfs
Opis:
Disjoint paths have applications in establishing bottleneck-free communication between processors in a network. The problem of finding minimum delay disjoint paths in a network directly reduces to the problem of finding the minimal disjoint paths in the graph which models the network. Previous results for this problem on chordal graphs were an O(|V| |E|²) algorithm for 2 edge disjoint paths and an O(|V| |E|) algorithm for 2 vertex disjoint paths. In this paper, we give an O(|V| |E|) algorithm for 2 vertex disjoint paths and an O(|V|+|E|) algorithm for 2 edge disjoint paths, which is a significant improvement over the previous result.
Źródło:
Discussiones Mathematicae Graph Theory; 1995, 15, 2; 119-145
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantitative OHS evaluation : RATE procedure compared with traditional reliability methodologies
Autorzy:
Pantanali, C.
Bianco, C.
Powiązania:
https://bibliotekanauki.pl/articles/2069678.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
RATE
SME
OHS
Opis:
The most careful and consolidated risk analysis methods, as FTA, ETA, FMEA/FMECA, focus attention on system reliability. But, looking at OHS, a deep analysis on European data on accidents at work and on work environment in general, shows how reliability is only one aspect of safety problem. These methods then are hardly adaptable when the main aim is to obtain a quantitative assessment of risk for workers; besides, Rother methodologies are nearest to OHS but give only qualitative results like HAZOP, or base their analysis on notdimensional values, fixed by analyst on personal experiences, like methods proposed by UNI EN 1050, by standard MIL-STD-882c and by AISS. RATE is proposed as a new quantitative methodology for OHS, particularly dedicated to SMEs considered as the most interesting from these aspect. The paper compares hypothesis and procedures which traditional quantitative methodologies and RATE are based on, to give evidence at the main approach aspects that have to be modified in order to move from reliability to OHS.
Źródło:
Journal of Polish Safety and Reliability Association; 2009, 2; 345--352
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Method of Fabric Wrinkle Measurement Based on Image Processing
Nowa metoda pomiaru zmarszczek materiałów włókienniczych oparta na przetwarzaniu obrazu
Autorzy:
Liu, C.
Zhang, C.
Powiązania:
https://bibliotekanauki.pl/articles/234189.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
fabric wrinkle
actual wear
measuring method
image processing
obrazy zmarszczek
rzeczywiste zużycie
metody pomiaru
przetwarzania obrazu
Opis:
In this paper, a system of fabric wrinkle measurement was developed which consisted of a fabric wrinkle simulator, scanner and computer. The simulator generated “diamond” wrinkles just like those of the elbow and knee in actual wear. The images of wrinkled fabrics acquired by the scanner were processed with software developed in MATLAB and new characteristics of wrinkle severity (WS) and fabric unevenness (FU) in the warp and weft direction were proposed for the wrinkle characterisation. 15 different fabrics were used to compare the measurement results of the system with those of the AATCC 66-2008 test method. The results showed good agreement of the two methods and at a 45° wrinkle recovery angle, the correlation between the wrinkle recovery angle and WS or FU increased. Therefore it was advised that the wrinkle recovery angle of 45° be measured rather than averaging warp and weft wrinkle recovery angles only when using the AATCC 66-2008 test method. Compared with the AATCC 66-2008 test method, that in this paper can produce more “realistic” wrinkles and measure the wrinkling properties of fabrics in actual wear.
Opracowana metoda polega na wykorzystaniu symulatora, skanera i komputera. Symulator generuje powstanie zmarszczek o kształcie odpowiadającym zmarszczkom na łokciach i kolanach powstałym podczas noszenia odzieży. Obrazy zmarszczek zidentyfikowane za pomocą skanera były przetwarzane za pomocą programu opracowanego w MATLAB. Do dalszej analizy zmarszczek wykorzystywano dwa parametry WS – intensywność zmarszczek i FU – nierównomierność materiału w kierunku wątku i osnowy. Dla porównań wykorzystano 15 różnych tkanin. Porównując wyniki uzyskane za pomocą analizowanego systemu z wynikami uzyskanymi z metody AATCC 66-2008 stwierdzono dobrą zgodność wyników uzyskanych z obydwu metod. Wyciągnięto praktyczne wnioski dotyczące stosowania obydwu metod przy ocenie zmarszczek ubrań po procesie noszenia.
Źródło:
Fibres & Textiles in Eastern Europe; 2014, 1 (103); 51-55
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Próby poszukiwania rzęsitka pochwowego w narządach płciowych wewnętrznych u kobiet
Attempts of searching T. vaginalis in the internal genital organs of woman
Popytki obnaruzhenija vlagalishhnojj trikhomonady vo vnutrennikh polovykh organakh u zhenshhin
Autorzy:
Zwierz, C.
Kłyszejko, C.
Powiązania:
https://bibliotekanauki.pl/articles/2179228.pdf
Data publikacji:
1964
Wydawca:
Polskie Towarzystwo Parazytologiczne
Opis:
The authrs examined the oviducts of women treated operatively in the IInd Clinic of Obstetrics and Gynecology, Medical School, Gdańsk, who exhibited a long-standing trichornonadosis, for the presence of T. vaginaiis. During the gynecologic operation, the oviducts were removed and placed on the Pawłowa medium wilh the incubalion at 37°; after 48 hours the fluid was centrifuged, the sediment placed on another medium and examined under microscope. The oviduct was flushed with buffor used for Pawłowa medium, precipitated, and centrifuged, transferring the sediment on Pawłowa medium. The cultures were checked after 24,48 and 72 hours. Among 4 women, in whom oviduct cultures were made, 2 showed positive results. In one case an isolated strain could be maintained through several passages, in the other, single degenerated, poorly motile forms of the protozoon were found after 24 hours, which disappeared completely in the next passages.
Źródło:
Wiadomości Parazytologiczne; 1964, 10, 2-3; 125-127
0043-5163
Pojawia się w:
Wiadomości Parazytologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A linear algorithm for the two paths problem on permutation graphs
Autorzy:
Gopalakrishnan, C.
Pandu Rangan, C.
Powiązania:
https://bibliotekanauki.pl/articles/972048.pdf
Data publikacji:
1995
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
algorithm
bridge
connectivity
disjoint paths
permutation graph
two paths problem
Opis:
The 'two paths problem' is stated as follows. Given an undirected graph G = (V,E) and vertices s₁,t₁;s₂,t₂, the problem is to determine whether or not G admits two vertex-disjoint paths P₁ and P₂ connecting s₁ with t₁ and s₂ with t₂ respectively. In this paper we give a linear (O(|V|+ |E|)) algorithm to solve the above problem on a permutation graph.
Źródło:
Discussiones Mathematicae Graph Theory; 1995, 15, 2; 147-166
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagenetic alteration in low-Mg calcite from macrofossils : a review
Autorzy:
Ullmann, C. V.
Korte, C.
Powiązania:
https://bibliotekanauki.pl/articles/2059799.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
diagenetic alteration
macrofossil calcite
isotopes
palaeoenvironment
Opis:
The quality of palaeoenvironmental reconstructions based on macrofossil carbonate critically depends on preservation of the shell material because post-depositional processes can modify its structural, chemical and isotopic composition, potentially overprinting or completely erasing palaeoenvironmental information. A suite of methods can be employed to evaluate the impact of diagenetic processes on the primary geochemical signatures of samples. Here we review the benefits and shortcomings of the most commonly employed optical (optical microscopy, cathodoluminescence microscopy, scanning electron microscopy) and chemical (trace element abundances, isotopic ratios) screening techniques used to assess the alteration degree of low-Mg calcite macrofossils and summarize the findings on diagenetic trends observed for elemental and isotopic systems in such materials. For a robust evaluation of the preservation state of biogenic calcite, it is advisable to combine a set of complementary techniques. Absolute limiting values of element and isotope ratios for discarding diagenetically altered materials cannot be universally applied, but should rather be evaluated on a case to case basis. The evaluation can be improved by analyses of diagenetic carbonate and altered fossil materials, which help constraining the diagenetic trajectories in the sampled specimens. Quantification of post-depositional alteration is possible, but in most cases the complexity of diagenetic systems hampers the possibility of retrieving original proxy values for palaeoenvironmental reconstructions from partially altered materials.
Źródło:
Geological Quarterly; 2015, 59, 1; 3--20
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An overview of maritime pine private non-industrial forest in the centre of Portugal: A 19-year case study
Autorzy:
Alegria, C.
Teixeira, M.C.
Powiązania:
https://bibliotekanauki.pl/articles/38521.pdf
Data publikacji:
2016
Wydawca:
Instytut Badawczy Leśnictwa
Źródło:
Folia Forestalia Polonica. Series A . Forestry; 2016, 58, 4
0071-6677
Pojawia się w:
Folia Forestalia Polonica. Series A . Forestry
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tracking and disturbance rejection in a nonlinear control system with time delay
Autorzy:
Chien, T.-L.
Chen, C.-C.
Wu, C.-J.
Huang, Y.-C.
Chen, C.-Y.
Powiązania:
https://bibliotekanauki.pl/articles/969741.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
disturbance rejection
automobile idle-speed control system
differential geometry approach
composite Lyapunov approach
Opis:
We consider the problem of designing a feedback control law in order to reject the unknown bounded disturbance and achieve tracking of reference inputs in control systems described by a class of nonlinear time-delay differential-algebraic equations. Based on the input-output feedback linearization technique and Lya-pimov method for nonlinear state feedback synthesis, a robust globally asymptotical output tracking controller design methodology for nonlinear time-delay control systems with delays on the states and the input is developed. The underlying theoretical approaches are the differential geometry approach and the composite Lyapunov approach. For the view of practical application, the proposed control methodology has been successfully applied to the famous nonlinear automobile idle-speed control system problem.
Źródło:
Control and Cybernetics; 2007, 36, 1; 59-74
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The committed service crew – the impact of passenger proximity on organizational commitment and job satisfaction
Autorzy:
Sandberg, C.
Hult, C.
Österman, C.
Praetorius, G.
Powiązania:
https://bibliotekanauki.pl/articles/1841605.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
committed service crew
organizational commitment
job satisfaction
passenger
ship crews
Swedish Seafarers
International Social Survey Programme
Statistical Package Social Science
Opis:
The present study focuses on the pattern of organizational commitment and job satisfaction among seafarers working on passenger vessels, compared to those working on board other types of ships. The dependent variable in the study is organizational commitment. Work position, age and job satisfaction are used as independent variables. The question posed in this study is whether the pattern of organizational commitment and job satisfaction differ depending on the proximity to passengers. The material is based on a survey sent to a random sample of seafarers in the Swedish Transport Agency’s register of seafarers. It has been analyzed with descriptive statistics and multivariate regressions comparing the two categories of vessels. The results show that organizational commitment is higher on passenger vessels, while the effect of job satisfaction on organizational commitment is slightly higher for ships that do not carry passengers. For managers in the service department, the level of commitment is to a higher extent dependent on job satisfaction. Development and communication of career options and opportunities for the service crew is suggested as a way to enhance organizational commitment and job satisfaction among this group.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 3; 595-600
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Ce3+ doping on the algal inhibiting properties of copper/sepiolite nanofibers
Autorzy:
Zhang, C. C.
Duan, X.
Ding, Y.
Srinivasakannan, C.
Powiązania:
https://bibliotekanauki.pl/articles/207260.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
copper
x ray diffraction
alga
miedź
dyfrakcja rentgenowska
glon
Opis:
Algal inhibiting materials were synthesized by the co-impregnation method. Cerium was taken as an algal inhibiting agent with copper/sepiolite utilized as the carrier. The algal growth inhibition was assessed based on the form of presence and distribution of Cu2+ and Ce3+ ions on the surface of sepiolite using X-ray diffraction (XRD) and SEM analysis. The results indicate that at 5 wt. % Cu content, 0.8 wt. % Ce and after heat treatment at 400 °C, the materials exhibit the best algal inhibiting capacity of 83.11%.
Źródło:
Environment Protection Engineering; 2017, 43, 4; 253-263
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficiency evaluation of Luffa cylindrica and Mucuna sloanei seeds in dye removal: A news approach
Autorzy:
Nnaji, P. C.
Okoye, C. C.
Umeuzuegbu, J. U.
Powiązania:
https://bibliotekanauki.pl/articles/1031647.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Luffa cylindrica
Mucuna sloanei
coag-flocculation rate constant
critical coag-flocculation rate constant
dye-based wastewater
Opis:
The use of Luffa cylindrica (LC) and Mucuna sloanei (MS) seeds as coagulants in the removal of dye by coag-flocculation was evaluated using a new approach. The approach uses the coag-flocculation rate constant K11, calculated using experimental data obtained while using LC and MS as coagulants in coag-flocculation process as a valid indicator to determine the optimum condition. The research also applied criterion for critical coag-flocculation rate constant Kc to satisfy World Health Organization’s minimum allowable level of suspended substance for wastewater discharge. In the criterion K11 ≥ Kc indicates better performance. The results indicated that K11 of 0.00214 L/mg·min for LC and 0.00208 L/mg·min for MS surpassed 0.00016 L/mg·min Kc value. This was observed for LC and MS at pH 2, but 1400 mg/L and 1200 mg/L, respectively. From the above, in accordance with the WHO guideline, the dosage of both coagulants meets the requirement. The solution pH could not meet the standard. Nonetheless, MS satisfied the requirement at pH 6, for dosage and pH. These results correspond to what was obtained experimentally. Therefore, in coag-flocculation kinetic modeling, this novel approach can be considered to track the efficiency of these sensitive factors in water treatment plants to meet the effluent quality requirements.
Źródło:
World Scientific News; 2020, 146; 184-201
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Restoration of plasma kidney and liver biomarkers in doxorubicin-treated Wistar rats by aqueous extracts of Pleurotus tuberregium sclerotia and Cnidoscolus aconitifolius leaves
Autorzy:
Ikewuchi, C.C.
Ikewuchi, J.C.
Ifeanacho, M.O.
Powiązania:
https://bibliotekanauki.pl/articles/2096610.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
albumin/globulin ratio
alkaline phosphatase
blood urea nitrogen
creatinine
doxorubicin
transaminases
Opis:
The ability of aqueous extracts of sclerotia of Pleurotus tuberregium and leaves of Cnidoscolus aconitifolius to regulate plasma markers of kidney and liver function/integrity was investigated in doxorubicin-treated Wistar rats. Doxorubicin (dissolved in normal saline) was injected intraperitoneally (15 mg/kg body weight) into the rats; metformin was daily administered orally at 250 mg/kg, while the extracts were daily administered orally at doses of 50, 75, and 100 mg/kg. Compared to the test control, in both the doxorubicin pre-treatment (or ameliorative) study and the extract pre-treatment (protective) studies, the extracts and metformin-treated groups had significantly lower (P < 0.05) plasma levels of alkaline phosphatase, alanine transaminase and aspartate transaminase, and concentrations of creatinine, urea, and blood urea nitrogen. However, the plasma globulin, albumin, and total protein concentrations and the albumin/globulin ratio of the extract and metformin-treated groups were significantly higher (P < 0.05). The extracts prevented (in the protective study) or attenuated (in the ameliorative study) doxorubicin-induced increase in the levels of plasma markers of kidney and liver function/integrity, and afforded protection or recovery towards near-normal values.
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2021, 102, 3; 297-306
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Edge-disjoint paths in permutation graphs
Autorzy:
Gopalakrishnan, C.
Pandu Rangan, C.
Powiązania:
https://bibliotekanauki.pl/articles/971918.pdf
Data publikacji:
1995
Wydawca:
Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:
algorithm
bridge
connectivity
disjoint paths
permutation graph
Opis:
In this paper we consider the following problem. Given an undirected graph G = (V,E) and vertices s₁,t₁;s₂,t₂, the problem is to determine whether or not G admits two edge-disjoint paths P₁ and P₂ connecting s₁ with t₁ and s₂ with t₂, respectively. We give a linear (O(|V|+|E|)) algorithm to solve this problem on a permutation graph.
Źródło:
Discussiones Mathematicae Graph Theory; 1995, 15, 1; 59-72
2083-5892
Pojawia się w:
Discussiones Mathematicae Graph Theory
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Anatomical distinctions of the Mesozoic lingulide brachiopods
Autorzy:
Biernat, G
Emig, C.C.
Powiązania:
https://bibliotekanauki.pl/articles/23486.pdf
Data publikacji:
1993
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Lingularia smirnovae
mezozoik
trias
skamienialosci
jura
Brachiopoda
muszle
Lingularia sibirica
lingule
ewolucja
kreda
morfologia
Lingula
Lingularia
Lingularia similis
paleontologia
Glottidia
Opis:
The long held view that Lingula represents an extremely bradytelic lineage is questioned. Examination of Mesozoic lingulides has shown that they significantly differ from their Recent relatives Lingula and Glottidia in having longer lophophoral cavities, shorter ventral canals, better developed posterior adductor muscles, and less acute umbones. Morphological characters of the shell interior are needed to identify members of the Lingulidae, not solely external shell characteristics. The apparent evolutionary tendency towards a reduction of the volume of the lophophoral cavity contradics the traditional view that the ‘living fossil’ Lingula has survived without significant morphological change since the Paleozoic. Actually the today living lingulide genera probably arose in the early Cenozoic. A new inarticulate brachiopod genus, Lingularia is introduced, with three new species. Middle Triassic L. siberica, Middle Jurassic L. similis, and Cretaceous L. smirnovae.
Badania dobrze zachowanych okazów mezozoicznych lingul wskazały, że te różnią się zasadniczo od współczesnych rodzajów Ligula i Glottidia objętością jamy lofoforalnej, długością kanałów wentralnego płaszcza, wykształceniem nieparzystego mięśnia tylnego adduktora oraz, dodatkowo, morfologią części dziobowych muszli. Zaznaczająca się tendencja ewolucyjna w kierunku redukcji objętości jamy lofoforalnej przeczy ogólnie przyjętemu poglądowi, że Lingula to „żyjąca skamieniałość”, która przeżyła, od wczesnego paleozoiku do dzisiaj, prawie bez zmian morfologicznych. W pracy wyodrębniono nowy rodzaj Lingularia z 3-ma nowymi gatunkami: L. sibirica (trias), L. similis (jura), L. smirnovae (kreda).
La traditionnelle opinion que Lingula représente une lingée très ancienne est remise en question. L’étude de lingules mésozoïques démontre que celles-ci diffèrent significativement des genres actuels Lingula et Glottidia par une cavité lophophorale plus volumineuse, des canaux ventraux du manteau plus courts, un développement plus important du muscle adducteur postérieur, les régions umbonales. Les caractères morphologiques internes s’avèrent indispensables pour pouvoir identifier les genres et espèces des Lingulidae, les caractères externes de la coquille étant insuffisants. La tendance évolutive d’une réduction de la cavité lophophorale s’oppose à l’opinion traditionnellement véhiculée que le genre fossile-vivant Lingula a survécu sans modification morphologique significative depuis le début du Paléozoïque: en fait, l’origine des lingules actuelles date probablement du début du Cénozoïque. Un nouveau genre de brachiopode inarticulé, Lingularia, est décrit avec trois nouvelle espèces, L. siberica (Trias Moyen), L. similis (Jurassique Moyen) et L. smirnovae (Crétacé).
Źródło:
Acta Palaeontologica Polonica; 1993, 38, 1-2; 1-20
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 7784

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