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Tytuł:
Mechanizmy segregacji materiałów ziarnistych
Segregation mechanisms of granular materials
Autorzy:
Kosmowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/227996.pdf
Data publikacji:
2010
Wydawca:
Wyższa Szkoła Menedżerska w Warszawie
Tematy:
segregacja materiałów
mechanizmy segregacji
mechanisms of segregation
segregation working
Opis:
W przemyśle spożywczym często stosujemy materiały sypkie (ziarna zbóż, produkty ich przemiału, cukier, dodatki smakowe, granulaty itp.). Operowanie materiałami ziarnistymi jest trudne. Mimo licznych badań zrozumienie ich zachowania się jest nadal niedostateczne. Prowadzonym operacjom stale towarzyszy segregacja utrudniająca właściwe przetwarzanie. Poznanie jej mechanizmów staje się koniecznością. Omówiono istotę segregacji i podstawowe jej mechanizmy. Wiedza ta jest niezbędna do świadomego wpływania na zachowanie się zróżnicowanego materiału sypkiego.
Segregation appears on processing granular materials. The mechanisms of segregation were presented. Reasons of segregation and her conditioning were published. These facts permit to take a decision consciously aiming to minimalizing segregation working.
Źródło:
Postępy Techniki Przetwórstwa Spożywczego; 2010, 1; 89-93
0867-793X
2719-3691
Pojawia się w:
Postępy Techniki Przetwórstwa Spożywczego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measures of social segregation in the context of Warsaw, Berlin and Paris metropolitan areas
Autorzy:
Grzegorczyk, Anna
Jaczewska, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/2085541.pdf
Data publikacji:
2015-11-10
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Segregation measures
social segregation
Warsaw
Berlin
Paris
Opis:
Social segregation is a subject common in contemporary studies of metropolitan areas. Until recently, studies of segregation focused on the distribution of ethnic groups, immigrants, and the poor. Today, they also cover additional indicators such as demographic properties, education, and affiliation with social and professional categories, which can also serve to determine the causes of the segregation (including the selfsegregation of the rich). This article aims to point out the measures of segregation that present the segregation levels in the most complete manner, along with their application in the context of three European metropolitan areas: Warsaw, Berlin, and Paris. The first part of the article is a review of the existing approaches to segregation measures, followed by the selection of research method, presentation of the analysis' results, and evaluation of the applied methods; presenting the opportunities and limitations in research of the social segregation phenomenon.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2015, 19, 3; 22-35
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Social and ethnic segregation in the Paris metropolitan area at the beginning of the 21st century
Autorzy:
Grzegorczyk, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2035820.pdf
Data publikacji:
2013-07-05
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Social segregation
spatial polarisation
autosegregation
segregation indices
Paris
Île-de-France
Opis:
Although the socio-spatial aspect of cities in the globalisation era has gained a new dimension, it cannot be explained by the globalisation process alone. The article presents the problem of social and ethnic segregation in Île-de-France between 1999 and 2009. Socio-economic and demographic data are used to measure indices of segregation and the description of characteristic chosen districts to show its spatial inertia. The analysis revealed a higher degree of social segregation in the entire Paris metropolitan region than in the city of Paris itself. The upper class is the most segregated group, followed by foreigners, immigrants and the lower class. The pattern emphasises the important role of autosegregation factors and functions. It is observed that a constant division into homogenous parts exists in the prestigious and affluent western districts and the impoverished immigrant north-eastern districts. Socio-spatial tendencies reveal the growing importance of the upper class.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2013, 17, 2; 20-29
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Residential Segregation in Warsaw and its Metropolitan Area in the Context of Changing Housing Policy
Autorzy:
Grzegorczyk, Anna
Jaczewska, Barbara
Powiązania:
https://bibliotekanauki.pl/articles/623779.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
housing policy
residential segregation
spatial segregation
Warsaw Metropolitan Area
Opis:
Warsaw and its metropolitan area seem an interesting testing ground for research on the phenomenon of residential segregation in the context of the evolution of housing policy, since the city has been subject to significant changes as a result of historical events. Each of these contributed to alterations in the level and the character of residential segregation. The goal of this article is to answer the following question: Was the changing housing policy in Warsaw and the surrounding metropolitan area during the transformation period and afterwards accompanied by a modification of the segregation structure and what differences can be noticed in the whole of the metropolitan area and in the city itself?
Źródło:
European Spatial Research and Policy; 2018, 25, 1; 131-155
1231-1952
1896-1525
Pojawia się w:
European Spatial Research and Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Residential Segregation at the Local Level in Poland. Case Studies for Praga Północ, Włochy and Ursynów
Autorzy:
Jaczewska, Barbara
Grzegorczyk, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2108269.pdf
Data publikacji:
2018-01-04
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Residential segregation
microscale segregation
Warsaw
enclaves of poverty
gated communities
gentrification
Opis:
The aim of this article is to answer two questions concerning the scale and the pattern of residential segregation in Warsaw at the local level and the character of contemporary processes accompanying and modifying this phenomenon. While examining residential segregation we have applied a multidimensional approach to underline the complex nature of this phenomenon. We have focused on data concerning different demographic and socio-economic categories. Furthermore we indicate and describe three socio-spatial, contemporary processes that have accompanied an increase in social inequalities in Warsaw (the creation of enclaves of poverty and wealth and the process of gentrification). The research reveals increasing social inequalities at the local level that began in the socialist era and have strengthened during the transformation period, as well as the stability of the socio-spatial pattern in selected districts that influence their local specifics.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2017, 21, 4; 168-178
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neighborhood, Segregation, and School Choice
Autorzy:
Schreurs, Zoë Elisabeth Antonia
Chang Rundgren, Shu-Nu
Powiązania:
https://bibliotekanauki.pl/articles/2028725.pdf
Data publikacji:
2021-12-27
Wydawca:
Akademia Ignatianum w Krakowie
Tematy:
neighbourhood
segregation
school choice
Opis:
Over the past few decades, school choice has been a widely debated issue around the globe, following the development of pluralism, liberty, and democracy. In many countries, school choice systems were preceded by residence-based school assignment systems, creating a strong connection between a neighborhood and its schools’ demographic compositions. However, schools often remain highly segregated. School segregation is thus seen as a major problem and is supposedly driven by three main factors: residential segregation, parental school choice, and schools’ selection of pupils. This paper aims to shed light on what research should be focusing on as regards school choice and residential segregation with the following two research questions: What are the links between neighborhood and school choice in the literature? How are neighborhood and school choice connected to school segregation in the literature? Two main findings emerged: (1) the neighborhood-based social networks that parents developed had limited their school choices and (2) neighborhood segregation is one of the most important factors that contributes to school segregation and is related to multi-ethnic and socioeconomic contexts.
Źródło:
Multidisciplinary Journal of School Education; 2021, 10, 2 (20); 111-133
2543-7585
Pojawia się w:
Multidisciplinary Journal of School Education
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Women at the top leadership positions. Obstacles, possibilities and the chimera of segregation
Autorzy:
Izolda, Takacs,
Powiązania:
https://bibliotekanauki.pl/articles/890437.pdf
Data publikacji:
2018-07-25
Wydawca:
Akademia Pedagogiki Specjalnej im. Marii Grzegorzewskiej. Wydawnictwo APS
Tematy:
women
work organizations
gender
rights
segregation
discrimination
Opis:
The paper takes into account the general characteristics of workplace organization, the organizational atmosphere relevant to gender and prejudices based on binary oppositions identified by women in leadership positions, which still limit their opportunities and choices. Career paths of women are at the focus of the study, especially in academia and science, including the difficulties faced by women when they move up in the organizational hierarchy, if they pursue career in science and if they aim for the leadership position
Źródło:
International Journal of Pedagogy, Innovation and New Technologies; 2018, 5(1); 74-84
2392-0092
Pojawia się w:
International Journal of Pedagogy, Innovation and New Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Segregation of Alien Bodies: Order and Exclusion
Autorzy:
Rewers, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/414110.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Warszawski. Instytut Ameryk i Europy. Centrum Europejskich Studiów Regionalnych i Lokalnych (EUROREG)
Tematy:
ład miejski
fragmentacja przestrzeni miejskiej
segregacja
rewitalizacja
urban order
fragmentation of urban space
segregation
revitalisation
Opis:
In this essay the author explores the relation between fragmentation, segregation, and reconstitution of urban order. Although metaphors of cohesiveness are usually applied to the past, and fragmentations to the present, nevertheless the city of fragmentations coexists recently with another image of the city – a nostalgic city of lived body. It will be hard to speak in simple notions of true and false experience here; the difference is in the very idea of Aristotelian “the good life”. Dealing with Edward Soja’s concept of somatography she will argue that in an age of informational technologies, mobility, and consumer culture, such old metaphors like city as a fragmented dead body and city as a lived body are more important than ever. Acts of differentiation, separation, and segregations are based both on urban somatophobia and urban somatophilia. The question to be asked here is what is reconstitution of urban order in the first sense, or revitalisation of city space in the second.
Źródło:
Studia Regionalne i Lokalne; 2009, numer specjalny / special issue; 23-36
1509-4995
Pojawia się w:
Studia Regionalne i Lokalne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Możliwości zmniejszania segregacji
The possibility of reducing the segregation
Autorzy:
Kosmowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/227944.pdf
Data publikacji:
2010
Wydawca:
Wyższa Szkoła Menedżerska w Warszawie
Tematy:
segregacja materiałów sypkich
możliwości zmniejszania
segregation of grainy materials
possibility of reducing
Opis:
Przemysł spożywczy obok przemysłu chemicznego i farmaceutycznego, jest największym producentem i przetwórcą materiałów sypkich. Procesowi przetwarzania tych materiałów stale towarzyszy segregacja. Poznanie czynników wpływających na segregację umożliwia podjęcie działań minimalizujących jej skutki. W każdym rodzaju segregacji najefektywniejszą metodą minimalizowania segregacji jest ujednorodnienie materiału. Istnieją też metody właściwe tylko dla określonych procesów obróbki i typów stosowanych urządzeń. W większości są one jakościowe lub empiryczne.
The methods of the reduction of segregation consist of improving the features of the material, the specific selection of apparatuses and their parameters and the control of the conditions in which one operates the grainy material. The well-known ways of limiting segregation are in qualitative or empirical majorities. Their mechanisms are not quite comprehensible. It is not known what solutions is optimum and how to join various methods effectively. The majority of machines and processes are projected by the method of tests and mistakes.
Źródło:
Postępy Techniki Przetwórstwa Spożywczego; 2010, 2; 90-92
0867-793X
2719-3691
Pojawia się w:
Postępy Techniki Przetwórstwa Spożywczego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sediment segregation on weirs of lowland rivers
Segregacja rumowiska na jazach nizinnych
Autorzy:
Bajkowski, S
Powiązania:
https://bibliotekanauki.pl/articles/81699.pdf
Data publikacji:
2010
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
sediment segregation
weir
lowland river
erosion
deposition
bottom material
granulometric composition
Opis:
Erosion and accumulation processes in the vicinity of water structures develop depending on the life of the facility, hydrological regime and morphology of the riverbed. Diversification of fl ow characteristics affects the segregation of bed sediment on section of period of weirs. Knowledge of factors determining granulometric diversity of bottom material allows for more appropriate bed and riverbanks protections design. It also enables estimation of the conditions of sediment transport down the watercourse and its participation in the balance of the transport of bottom material in the watercourse. Areas where sediment accumulates on the water structures are up water and down water positions, stilling basin and other cavities of the structure. The article presents an analysis of granulometric composition of bottom material in selected lowland weirs. Research facilities are weirs located on lowland rivers. Segregation of sediment material was observed on weir sections. Thickest sediment is piled in up water, smallest in down water.
Procesy akumulacjno-erozyjne w pobliżu budowli wodnych rozwijają się w zależności od okresu eksploatacji obiektu, reżimu hydrologicznego oraz morfologii koryta cieku. Zróżnicowanie charakterystyk strumienia na odcinku piętrzenia wpływa na segregację materiału dennego. Znajomość czynników decydujących o zróżnicowaniu granulometrycznym materiału dennego pozwala na właściwsze projektowanie zabezpieczeń dna i skarp. Daje też możliwość oszacowania warunków transportu rumowiska w dół cieku i jego udziału w bilansie transportu materiału dennego w korycie cieku. Obszarami, w których gromadzi się rumowisko na budowlach wodnych są stanowisko górne i dolne, niecka wypadowa oraz inne zagłębienia w konstrukcji. W artykule poddano analizie skład granulometryczny materiału dennego na wybranych jazach nizinnych. Obiektami badawczymi były jazy położone na rzekach nizinnych. Na odcinkach jazowych występuje tendencja do segregacji rumowiska. W stanowisku górnym gromadzi się rumowisko najgrubsze, przy wylocie najdrobniejsze.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation; 2010, 42, 1; 177-185
0208-5771
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Segregation of Elements in Continuous Cast Carbon Steel Billets Designated for Long Products
Autorzy:
Hutny, A. M.
Warzecha, M.
Derda, W.
Wieczorek, P.
Powiązania:
https://bibliotekanauki.pl/articles/354222.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
continuous casting
billet
segregation
Opis:
This article presents research results concerning designation of the scope of segregation of elements by analysing the ingot, designated for hot rolling of long products. The research tests were performed under industrial conditions, during continuous casting production cycle of high carbon steels. From cc ingots with square cross-section of 160 mm samples having the length of 400 mm were collected, out of which two samples were cut up, the so-called templates with the thickness of 20 mm. Segregation of elements was determined based on the quantitative analysis of results performed by using spark spectrometry pursuant to PN-H-04045. Changes in concentrations of elements were analysed along the line, which join the opposite sides of the sample in their half length and pass through the geometric centre of the square cross-section. In the further course of the research study, there was also determined the segregation along perpendicular line up to the surface connecting the core of the cross-section with lateral plane. Designations of element contents were performed at points distanced from each other by approx. 10 mm and situated on the lines. There was found segregation of carbon, sulphur and phosphorus.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 4; 2037-2042
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Segregacja obcych ciał: porządek i wykluczenie
Segregation of Alien Bodies: The Order and Exclusion
Autorzy:
Rewers, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/413957.pdf
Data publikacji:
2008
Wydawca:
Uniwersytet Warszawski. Instytut Ameryk i Europy. Centrum Europejskich Studiów Regionalnych i Lokalnych (EUROREG)
Tematy:
segregacja
miasto
separacja
porządek miejski
segregation
city
separation
urban order
Opis:
Autorka tego eseju poszukuje relacji między fragmentacją, segregacją i rekonstrukcją porządku w mieście. Aczkolwiek metafory zwartości są na ogół stosowane w odniesieniu do przeszłości, a fragmentacji do teraźniejszości, to sfragmentaryzowne miasto współistnieje dzisiaj z innym obrazem miasta – nostalgicznym miastem przedstawianym jako żywe ciało. Trudno byłoby ujmować to doświadczenie przy pomocy prostego przeciwstawienia prawdziwego doświadczenia fałszywemu; różnica tkwi bowiem w samej idei „dobrego życia” wprowadzonej przez Arystotelesa. Analizując pojęcie somatografii wprowadzone przez Edwarda Soję, uzasadnia się, dlaczego w wieku technologii informatycznych, mobilności i kultury konsumpcyjnej takie metafory miasta jak podzielone, martwe ciało oraz żyjące ciało stają się ważniejsze niż kiedykolwiek. Akty różnicowania, separacji i segregacji są ufundowane bowiem zarówno na miejskiej somatofobii, jak miejskiej somatofilii. Pytanie postawione w tym eseju dotyczy zatem sposobu rekonstrukcji miejskiego porządku w pierwszym sensie oraz rewitalizacji przestrzeni miejskiej – w drugim.
In this essay the author explores the relation between fragmentation, segregation, and reconstitution of urban order. Although metaphors of cohesiveness are usually applied to the past, and fragmentations to the present, nevertheless the city of fragmentations coexists recently with another image of the city – a nostalgic city of lived body. It will be hard to speak in simple notions of true and false experience here; the difference is in the very idea of Aristotelian “the good life”. Dealing with Edward Soja’s concept of somatography she will argue that in an age of informational technologies, mobility, and consumer culture, such old metaphors like city as a fragmented dead body and city as a lived body are more important than ever. Acts of differentiation, separation, and segregations are based both on urban somatophobia and urban somatophilia. The question to be asked here is what is reconstitution of urban order in the first sense, or revitalisation of city space in the second.
Źródło:
Studia Regionalne i Lokalne; 2008, 2(32); 5-17
1509-4995
Pojawia się w:
Studia Regionalne i Lokalne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bacterial chromosome segregation.
Autorzy:
Bartosik, Aneta
Jagura-Burdzy, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/1041457.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
proteins engaged in chromosome partitioning
sister cohesion model
bacterial cell cycle
factory model
chromosome replication and segregation
Opis:
In most bacteria two vital processes of the cell cycle: DNA replication and chromosome segregation overlap temporally. The action of replication machinery in a fixed location in the cell leads to the duplication of oriC regions, their rapid separation to the opposite halves of the cell and the duplicated chromosomes gradually moving to the same locations prior to cell division. Numerous proteins are implicated in co-replicational DNA segregation and they will be characterized in this review. The proteins SeqA, SMC/MukB, MinCDE, MreB/Mbl, RacA, FtsK/SpoIIIE playing different roles in bacterial cells are also involved in chromosome segregation. The chromosomally encoded ParAB homologs of active partitioning proteins of low-copy number plasmids are also players, not always indispensable, in the segregation of bacterial chromosomes.
Źródło:
Acta Biochimica Polonica; 2005, 52, 1; 1-34
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implementation of IoT Based Waste Segregation and Collection System
Autorzy:
Fataniya, Bhupendra
Sood, Aayush
Poddar, Deepti
Shah, Dhaval
Powiązania:
https://bibliotekanauki.pl/articles/227107.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
smart city
IoT
smart waste management
waste segregation
Opis:
Waste management is a challenging problem for most of the countries. The current waste segregation and the collection method are not efficient and cost-effective. In this paper, a prototype is presented for smart waste management. It is also capable of waste segregation at the ground level and providing real-time data to the administrator. Impact and cost analysis of the deployment of smartbin is also presented considering one ward of Ahmedabad Municipal Corporation. It is clear from that deployment of this smartbin will save about 40% of the current expenditure for that ward.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 4; 579-584
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
DIFFERING PERSPECTIVES ON SCHOOL SEGREGATION ISSUES IN AMERICAN CHILDREN’S PICTURE BOOKS
Autorzy:
Klęczaj-Siara, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/628269.pdf
Data publikacji:
2020
Wydawca:
Fundacja Pro Scientia Publica
Tematy:
racial segregation
American schools
picture books
text-image relationships
children’s literature
Opis:
Aim. School segregation is a common theme of children’s books on minority groups living in the United States. Although it is primarily associated with black-white racial divisions, currently it also concerns white-Latino or rich-poor disparities. The aim of this paper is to analyse children’s picture books featuring Latino and African American characters who participate in the struggle against school segregation. The authors of the books, being members of racial minorities themselves, offer differing perspectives on the problem. Although they criticise school segregation, they also focus on the white perspective and the reasons why integrating schools has always been hard to achieve. Methods. The study analyses the visual and verbal narratives of selected picture books using a variety of methods for examining this literary format. Among others, it applies the theory of picture book analysis by Martin Painter, William Moebius, Maria Nikolajeva and Carole Scott. Results. The article shows that despite the existing scholarship on race-related problems in American schools, children’s literature seems to be the medium which tries to explain the problem to youngsters being directly involved in the system of segregation. Conclusions. The results can be useful to educators who cope with the issue of racial diversity in American schools. They may consider using selected titles of children’s literature as teaching aids assisting students from minority groups in the process of self-development and empowerment.
Źródło:
Journal of Education Culture and Society; 2020, 11, 2; 322-334
2081-1640
Pojawia się w:
Journal of Education Culture and Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Proces segregacji w aparatach bębnowych
Segregation in the rotating drum
Autorzy:
Malek, K.
Powiązania:
https://bibliotekanauki.pl/articles/372471.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
segregacja
aparat bębnowy
metoda PIV
złoże polidyspersyjne
segregation
rotating drum
PIV method
polydisperse bed
Opis:
W artykule przedstawiono wyniki badań, których celem było określenie wpływu stopnia wypełnienia materiałem polidyspersyjnym oraz prędkości obrotowej aparatu bębnowego na proces segregacji. Badania wykazały wyraźną segregację cząstek polidyspersyjnych przy niskich prędkościach obrotowych. Zastosowanie metody PIV pozwoliło wyznaczyć strefę stagnacji, cyrkulacji oraz mieszania. Badania wykazały, że wraz ze wzrostem stopnia wypełnienia bębna prędkości kataraktowania spadają.
The aim of this study was to determine the effect of fillin degree of polydisperse material and drum velocity on the segregation process. Studies have shown a clear segregation of polydispersed particles at low velocitys. The PIV is able to determine: the stagnation, circulation and mixing zone. With fillin degree increase cataracting velocity decreases.
Źródło:
Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski; 2015, 158 (38); 32-39
1895-7323
Pojawia się w:
Zeszyty Naukowe. Inżynieria Środowiska / Uniwersytet Zielonogórski
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Segregation of Elements in Billets Made of Carbon Steels for Long Products
Autorzy:
Hutny, A. M.
Warzecha, M.
Wieczorek, P.
Derda, W.
Powiązania:
https://bibliotekanauki.pl/articles/354733.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
steelmaking
continuous casting
billet
segregation
optical emission spectrometry
Opis:
The article presents the results of investigations performed on segregation of elements in the billets. The research were performed under standard industrial conditions, during high carbon steel production cycle. Probes (templates with the thickness of 20 mm) were taken from billets with square cross-section of 160 mm. Segregation of elements was determined based on the quantitative analysis of results performed by using spark spectrometry pursuant to PN-H-04045. Changes in concentrations of elements were analysed along two cross-sections. Element contents were performed at points distanced from each other by approx. 10 mm. The segregation of carbon, sulphur and phosphorus was determined for different billets.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 2075-2079
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nature of Segregation in the Steel Static and Brass Continuously Cast Ingots
Autorzy:
Wołczyński, W.
Powiązania:
https://bibliotekanauki.pl/articles/356511.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
macro-segregation maps
brass ingots morphology
marginal stability criterion
Growth Law for columnar structure
formation
Opis:
Experimental observations of the steel morphology as well as measurements of the solutes concentration in the macro-scale were made on the basis of the vertical cut at the mid-depth of the 15-tons steel forging ingot serially produced in one of the steel plant in Poland. Experimental observations of the morphology accompanied by the measurements of the Peclet Number were also made on the cross-section of the continuously cast brass ingots serially produced in the copper / brass industry in Poland. The performed measurements allowed to work out some maps of the alloying elements segregation for the longitudinal section of the steel static ingot and a Growth Law for the columnar grains formation in the brass ingots. The marginal stability criterion has been applied to the last mentioned development / description. Some suggestions for the micro-segregation measurement mode in the columnar structure are derived.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 4; 1915-1922
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recycling and segregation of used aluminium beverage cans according to the residents of Silesia voivodship
Autorzy:
Ingaldi, M.
Powiązania:
https://bibliotekanauki.pl/articles/111996.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
aluminium
used beverage cans
recycling
segregation
environmental protection
recykling
złom aluminiowy
ochrona środowiska
Opis:
Aluminium is one of raw materials that can be practically continuously recycled. Thanks to the proper sorting of aluminium scrap it is possible to produce precisely the same products that it was made before Selective waste collection and an extensive network of waste collection points have significant impact on the recovery level of used aluminium beverage cans. The purpose of the article was to analyse the results of surveys on aluminium segregation in Silesia voivodship. According to literature people are increasingly interested in environmental protection and what is happening with waste generated by them. But there is lack of information about people from different regions of Poland. From the research presented in the paper it can be concluded that people realize that used aluminium beverage cans become packaging waste which can be easily recycled so most of them segregate them in everyday life. This is the result of changes in the legislation on municipal waste and their segregation, as well as the element of environmental education.
Źródło:
Production Engineering Archives; 2017, 16; 7-11
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of radiotracers as tools to determine feed flowrate imbalances and particle size segregation in industrial flotation circuits
Autorzy:
Diaz, Francisco
Barrientos, Nelson
Powiązania:
https://bibliotekanauki.pl/articles/24291630.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
radiotracers
flotation
particle size segregation
feed flow distribution
Opis:
This publication presents the application of radiotracers in the characterization of industrial flotation circuits. Two examples are showcased: the detection of feed flow rate imbalances and the characterization of particle size segregation in automatic mineral-cutting machines. The feed pulp distribution was determined from the mean residence times. Particle size segregation was measured by sampling the cutting machines (≅ 25 grams samples) using coarse, intermediate, and fine-sized radiotracer particles. Radiotracers were injected into the feed streams and measured at various points of the circuit using nuclear instruments, allowing for non-invasive and real time detection. Results show that in the rougher flotation stage, the feed flow is distributed almost evenly in lines 2 and 3 (approximately 38% of the flow goes to each line) and to a lesser extent towards line 4 (approximately 24%). In lines 1 and 2 of the scavenger stage, a higher percentage of the flow goes towards line 1 (approximately 59%) and a lower percentage towards line 2 (41%). Line 6 of the rougher flotation is the fastest of the circuit (shortest residence time). In addition, the inlet mineral-cutting machine of the rougher stage segregates particles with a bias for fine sizes (11.4 % more fine-sized particles than coarse ones). This work is an example of how radiotracer technology can be applied to improve metal production and processes. Radiotracers provide reliable information to be used in combination with other metallurgical data to properly assess flotation circuits.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 5; art. no. 174817
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gene segregation in a barley DH population
Autorzy:
Szarejko, I
Maluszynski, M
Polok, K
Zbieszczyk, J
Powiązania:
https://bibliotekanauki.pl/articles/2046613.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
doubled haploid
barley
haploid plant
gametoclonal variation
gametic selection
anther culture
population
gene segregation
Opis:
A large population of anther culture-derived barley regenerants and their progeny was tested for allele segregation at 1 isozyme and 8 morphological marker loci. The segregation of genetic markers was examined separately for haploid, diploid and polyploid regenerants. All the 9 analysed genes except al (albino lemma) on chromosome 3 segregated according to the expected 1:1 ratio in the microspore-derived barley population. There was no difference in allele distribution between haploid and diploid regenerants. Among the limited number of 34 analysed tetraploids a significant excess of the dominant allele at locus о (orange lemma) of chromosome 6 was also observed. The recombination frequency between linked genes (n - lk2 on chromosome 1 and r - s on chromosome 7) estimated in the DH population did not differ significantly from recombination rates calculated in F₂ progeny or presented in barley chromosome maps. The phenomenon of gametic selection is discussed in relation to the genotype dependency of anther culture response and procedures used for DH production in barley.
Źródło:
Journal of Applied Genetics; 1997, 38, 4; 415-424
1234-1983
Pojawia się w:
Journal of Applied Genetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prp4 kinase is required for proper segregation of chromosomes during meiosis in Schizosaccharomyces pombe
Autorzy:
Pozgajova, Miroslava
Cipak, Lubos
Trakovicka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/1039511.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
Prp4 protein kinase
S. pombe
meiosis
segregation
protein phosphorylation
Opis:
Chromosome segregation during meiosis is a complex process, which leads to production of four haploid gametes from two precursor cells. Reversible phosphorylation of proteins plays a crucial role in this process. The Schizosaccharomyces pombe Prp4 is an essential serine/threonine protein kinase, which belongs to the Clk/Sty family. To study the role of Prp4 in meiosis, we analysed chromosome segregation in a strain carrying conditional analog-sensitive allele of Prp4 protein kinase (prp4-as2). Our data show, that Prp4 protein kinase plays important role in chromosome segregation during meiosis, as revealed by enhanced missegregation of chromosomes in prp4-as2 mutant cells.
Źródło:
Acta Biochimica Polonica; 2013, 60, 4; 871-873
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Urban shrinkage and socio-economic segregation in medium-sized cities: The case of Schwerin (Germany)
Autorzy:
Huntington, David
Powiązania:
https://bibliotekanauki.pl/articles/2043636.pdf
Data publikacji:
2021-12-30
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
urban shrinkage
socio-economic segregation
medium-sized cities
post-socialist cities
socio-spatial inequality
Opis:
Although past studies have found that processes of urban shrinkage may act as a catalyst for socio-economic segregation, these relationships remain underexplored outside the context of large cities and capitals. Moreover, cities at lower-tiers of the urban hierarchy in post-socialist Europe have been doubly excluded from the critical discourse on the socio-spatial effects of shrinkage. Hence, this article examines how shrinkage affects socio-economic segregation in the medium-sized post-socialist city of Schwerin, employing segregation indices to assess levels of spatial unevenness and location quotients to map intra-urban patterns of vulnerable population groups over time. Results indicate processes of shrinkage may exacerbate socio-economic segregation in medium-sized cities and that the spatial heterogeneity of shrinkage intersects with uneven distributions of affluence and poverty. However, suggesting that legacies of state socialism shape contemporary socio-spatial change, segregation in Schwerin is strongly conditioned by its socialist-era housing estates, which are generally characterised by the highest rates of population decline, vacancy, and vulnerable groups.
Źródło:
Quaestiones Geographicae; 2021, 40, 4; 29-46
0137-477X
2081-6383
Pojawia się w:
Quaestiones Geographicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zjawisko segregacji materiału dwuskładnikowego w transporcie pneumatycznym
Phenomenon of two-component material segregation in pneumatic conveying
Autorzy:
Ignasiak, K.
Zagaj, I.
Ulbrich, R.
Powiązania:
https://bibliotekanauki.pl/articles/2071775.pdf
Data publikacji:
2012
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
segregacja
materiał ziarnisty
transport pneumatyczny
segregation
granular material
pneumatic transport
Opis:
W pracy zaprezentowano wyniki badań dotyczące zjawiska segregacji materiału dwuskładnikowego podczas wypływu z poziomego rurociągu pneumatycznego. Jako materiał badawczy wykorzystano cząstki kuliste o średnicy 6 mm i różnych gęstościach, które połączono w układy dwuskładnikowe. W celu oceny wpływu prędkości gazu na rozmiar zjawiska segregacji posłużono się stopniem nierównomierności rozkładu koncentracji przestrzennej oraz frakcyjnej.
Test results dealing with two-component material segregation during discharge from a horizontal pneumatic pipeline are presented in the paper. Spherical particles of 6 mm in diameter and different densities, combined in a two-component system, were used as research material. The degree of spatial and fractional non-uniformity of concentration distribution was employed in the evaluation of gas velocity effect on size segregation.
Źródło:
Inżynieria i Aparatura Chemiczna; 2012, 5; 221-223
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 220

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