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Wyświetlanie 1-15 z 2124
Tytuł:
"Battery of Bioassays" for Diagnostics of Toxicity of Natural Water when Pollution with Aluminum Compounds
Autorzy:
Olkova, Anna
Berezin, Grigory
Powiązania:
https://bibliotekanauki.pl/articles/1839077.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
bioassay
aluminum
battery of bioassay
Daphnia magna
Ceriodaphnia affinis
Paramecium caudatum
Escherichia coli
Opis:
The article presents the results of an experimental comparison of the sensitivity of biotests using Daphnia magna Straus, Ceriodaphnia affinis Lilljeborg, Paramecium caudatum Ehrenberg, and Escherichia coli Migula (strain M-17) to water pollution with aluminum compounds. The research was carried out under simulated conditions: the model toxicant was aluminum sulfate Al2(SO4)3∙18H2O, the concentration range per Al was 0.04–2.8 mg/dm3, and the pH of the tested waters was close to the neutral level of 7.2–7.8. The bioluminescence of E. coli significantly decreased at an Al concentration of 0.8 mg/dm3 (toxicity index was 93.3±1.2, which refers to a high level of toxicity). The reaction of P. caudatum was weaker: a high level of toxicity was achieved at an Al concentration of 2.8 mg/dm3. These doses did not cause the death of D. magna and C. affinis in short-term experiments (28 and 96 hours, respectively). However, in the tests for the chronic toxicity of aluminum, we showed that the doses of 0.8 and 2 mg/dm3 Al cause high death of individuals (more than 50%) and a significant decrease in the number of offspring. The range of sensitivity of the bioassay methods to water pollution with aluminum turned out to be as follows: bioassay for the bioluminescence of E. coli > bioassay for the changes in chemotaxis of P. caudatum > bioassay for the changes in fertility of D. magna > bioassay for the changes in fertility of C affinis.
Źródło:
Journal of Ecological Engineering; 2021, 22, 2; 195-199
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
„Bike S Szczeciński Rower Miejski” jako przedsięwzięcie prowadzące do wzrostu jakości życia mieszkańców
“Bike_S Szczecin City Bike” as a Project Leading to an Increased Quality of Citizens’ Life
«Bike_S, Щецинский городской велосипед» как мероприятие, направленное на повышение качества жизни населения
Autorzy:
Stępień-Słodkowska, Marta
Ustianowski, Przemysław
Krajewska-Pędzik, Anna
Powiązania:
https://bibliotekanauki.pl/articles/563462.pdf
Data publikacji:
2017
Wydawca:
Polski Instytut Ekonomiczny
Tematy:
jakość życia
rozwój zrównoważony
zanieczyszczenie powietrza
system rowerowy
miasto Szczecin
quality of life
sustainable development
air pollution
cycling system
the city of Szczecin
качество жизни
устойчивое развитие
загрязнение воздуха
велосипедная система
г. Щецин
Opis:
Celem badań było uzyskanie informacji od Prezesa NiOL Spółki z o.o. na temat rozwoju systemu rowerowego w Szczecinie oraz jego wpływu na jakość życia mieszkańców. Metodą wybraną do badań była metoda sondażu diagnostycznego, techniką − wywiad. Uzyskane dane posłużyły do charakterystyki rozwoju systemu rowerowego w Szczecinie ze szczególnym uwzględnieniem wpływu na poprawę jakości życia mieszkańców. System Bike_S został uruchomiony w sierpniu 2014 roku w odpowiedzi na wnioski mieszkańców Szczecina, którzy obserwując powstawanie podobnych systemów w innych miastach chcieli korzystać z takiego rozwiązania również w Szczecinie. Pierwszy etap budowy systemu zakładał 33 stacje, na których można było korzystać łącznie z 342 rowerów. Obecnie system składa się z 82 stacji rozlokowanych zarówno na lewobrzeżnej, jak i prawobrzeżnej części miasta, a do dyspozycji użytkowników oddano ponad 700 rowerów. Z uwagi na podwojenie liczby stacji rowerowych oraz rowerów wzrosła również dzienna liczba wypożyczeń rowerów, a liczba zarejestrowanych użytkowników sięga prawie 30 000.
The aim of the study was to obtain information from the President of the Company NiOL on the development of the cycling system in Szczecin and its impact on the quality of citizens’ life. The method chosen for the study was the method of diagnostic survey while the technique - an interview. The obtained data were used to characterise the development of the cycling system in Szczecin, with a particular emphasis on the impact on improving the quality of citizens’ life. The Bike_S system was launched in August 2014 in response to requests of Szczecin citizens who, observing the emergence of similar systems in other cities, wanted to use such a solution also in Szczecin. The first phase of construction of the system included a performance of 33 stations where one could use a total of 342 bicycles. The system currently consists of 82 stations located both on the left bank and the right bank part of the city, and there are available for use more than 700 bikes. Because of the doubling of the number of stations and bicycles, the daily number of rentals also increased and the amount of registered users now reaches almost 30 000.
Цель изучения заключалась в получении информации от председателя NiOL, ООО, о развитии велосипедной системы в Щецине, а также о ее влиянии на качество жизни населения города. Методом, избранным для исследований, был диагностический зондаж, техникой же – интервью. Получен- ные данные послужили для характеристики развития велосипедной системы в Щецине, с особым учетом влияния на повышение качества жизни жителей. Система Bike_S начала действие в августе 2014 г. в ответ на предложения жителей Щецина, которые, наблюдая возникновение похожих систем в других городах, хотели пользоваться таким решением также в своем городе. Первый этап формирования системы предполагал наличие 33 стоянок, на которых можно было пользоваться в общей сложности 342 велосипедами. В настоящее время система состоит из 82 стоянок, расположенных как в левобережной, так и правобережной части города, а в распоряжение пользователей переданы свыше 700 велосипедов. Ввиду удвоения числа велосипедных стоянок и велосипедов возрос также ежедневный прокат велосипедов, число же зарегистрированных пользователей достигает почти 30 000.
Źródło:
Handel Wewnętrzny; 2017, 4 (369) Tom II; 233-242
0438-5403
Pojawia się w:
Handel Wewnętrzny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
„Nieczyste niebo” i „czarcie złoto” — zdrowotne i środowiskowe konsekwencje powojennej industrializacji. Studium przypadku
Autorzy:
Szpak, Ewelina
Powiązania:
https://bibliotekanauki.pl/articles/2081191.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
historia środowiskowa
zanieczyszczenie środowiska
ochrona środowiska
rekultywacja
Siarkopol Tarnobrzeg
environmental history
environmental pollution
environmental protection
environmental reclamation
Opis:
The paper aim is to describe the processes entangled with the enviromental devastation caused by postwar forced industrialization. It focuses on the everyday life practices of the people living in intensively transformed environment of Tarnobrzeg's industrial area. Therefore the key questions it discusses are: how the local community imagined nature? If and how it changes in time? What exactly shaped these changes? How local and central authorities deal with the environmental pollution?
Źródło:
Historyka studia metodologiczne; 2016, 46; 187-196
0073-277X
Pojawia się w:
Historyka studia metodologiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
„Pozdrowienia z Polski”. Fotografia jako narzędzie mobilizacji społecznej w walce z zanieczyszczeniem wizualnym
”Greetings from Poland”. Photography as a social mobilisation tool against visual pollution
Autorzy:
Stańczyk, Xawery
Powiązania:
https://bibliotekanauki.pl/articles/2157575.pdf
Data publikacji:
2022-07-31
Wydawca:
Narodowe Centrum Kultury
Tematy:
fotografia
krajobraz
reklama
ustawa krajobrazowa
aktywizm
photography
landscape
advertising
Landscape Act
activism
Opis:
When the draft Landscape Act was presented in the Sejm (the lower house of the Polish Parliament) in 2013, social organisations launched a civic campaign ‘Senators, Clean up the Ads!’. As part of the campaign, the Miasto Moje a w Nim Association released a series of the Greetings from Poland postcards with landscape views from Polish mountains, seaside resorts, and cities visually polluted with excessive outdoor advertising. This was not the first case when images of ad-obscured landscapes were used. As early as in 2009, Elżbieta Dymna and Marcin Rutkiewicz published a photo album Polski outdoor [Outdoor Poland] documenting visual pollution in Poland. Similar actions were organised in various cities after the Landscape Act entered into force in 2015. The aim of this article is to analyse the use of photography as a social mobilisation tool intended to, on the one hand, increase social awareness and support changes in the landscape and, on the other hand, put pressure on officials and politicians by reversing this process. The ads or images that went outdoor were now themselves reproduced and disseminated online, at exhibitions, and in publications.
Źródło:
Kultura Współczesna. Teoria. Interpretacje. Praktyka; 2022, 118, 2; 34-47
1230-4808
Pojawia się w:
Kultura Współczesna. Teoria. Interpretacje. Praktyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
„Pyły, ludzie, przyroda”. Zanieczyszczenie powietrza atmosferycznego w województwie kieleckim w latach 1975–1989
Autorzy:
Dulewicz, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/689870.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Historii im. Tadeusza Manteuffla PAN w Warszawie
Tematy:
air pollution
cement dust
forest degradation
ecological threat
industrialization
environment
zanieczyszczenie powietrza
pyły cementowe
degradacja lasów
zagrożenie ekologiczne
industrializacja
środowisko
Opis:
The industrialization of the 1975–1989 period brought changes in spatial development and transformations in the human natural environment. New industrial investments required space for their implementation. As a result, the size of green areas near the cities gradually decreased. In addition, the activity of the “old” plants, as well as those under development, posed a serious threat to the environment. These problems were also evident in the province of Kielce. In the middle of the Gierek’s decade the region ranked fifth in the country in terms of the amount of pollution emitted into the atmosphere. In the area of “White Basin”, where many cement and lime factories were concentrated, dust fallout production standards were exceeded even several times. Results of the analyses on the problem of environmental threats may become an important part of the debate on socio-economic processes taking place in Poland during the postwar period. Hitherto studies of industrialization in the years 1944/1945–1989 focused mainly on its social consequences. However, they almost completely ignore the issue of degradation of the ecosystem, which is also closely associated with the industrialization pursued.
W artykule przeanalizowano relacje zachodzące pomiędzy procesem industrializacji a stanem środowiska naturalnego w PRL w latach 1975–1989 na przykładzie województwa kieleckiego. Prowadzona w tym okresie rozbudowa przemysłu bez uwzględnienia potencjalnych zagrożeń ekologicznych spowodowała szybką degradację poszczególnych komponentów ekosystemu. Środowiskowy fragment historii społeczno-gospodarczej Polski w okresie powojennym jest szczególnie ciekawy i warty pogłębionych studiów, tym bardziej że dotychczas był to aspekt pomijany przez badaczy dziejów najnowszych.
Źródło:
Polska 1944/45-1989. Studia i Materiały; 2016, 14
2450-8365
Pojawia się w:
Polska 1944/45-1989. Studia i Materiały
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
“Small in size, but big in impact”: socio-environmental reforms for sustainable artisanal and small-scale mining
Autorzy:
Owusu, Obed
Bansah, Kenneth Joseph
Mensah, Albert Kobina
Powiązania:
https://bibliotekanauki.pl/articles/92012.pdf
Data publikacji:
2019
Wydawca:
Główny Instytut Górnictwa
Tematy:
artisanal and small-scale mining
environmental pollution
environmental sustainability
ASM
livelihood
mercury
heavy metals
górnictwo tradycyjne i na małą skalę
zanieczyszczenie środowiska
zrównoważoność środowiskowa
utrzymanie
rtęć
metale ciężkie
Opis:
Artisanal and small-scale mining (ASM) - small sized, largely unrecognized, rudimentary, and an informal form of mining - occurs in more than 70 countries around the world and is mainly hailed for its socioeconomic benefits and reviled for its environmental devastation. As a result, many people are confused about the future of ASM. In Ghana, the government banned ASM in 2017 and formed a security taskforce drawn from the military and police to crack down on nomadic and local ASM workers who defy the ban. This approach is unsustainable, deals less with the fundamental problems, and increases poverty among the already impoverished local populations who depend on this type of mining as their only means of livelihood. To support the argument for sustainable reforms, revenue growth decomposition and growth accounting analyses were performed to determine the factors shaping ASM revenue over 25 years (1990-2016). Results show that production (gold output) is the most important factor that influences revenue growth from ASM, contrary to the usual view that the price of the metal is mainly responsible for the increase in revenue. Thus, increasing labor hours in ASM could significantly increase mining revenue, reduce unemployment, and improve local commerce. We strongly conclude that sustainable reforms such as increasing local participation in decision making, education and training, adoption of improved technology, strengthening regulatory institutions, legislation and enforcement of enactments, and the provision of technical support and logistics could ensure socio-environmental sustainability.
Źródło:
Journal of Sustainable Mining; 2019, 18, 1; 38-44
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
‘Smoging kills’ - effects of air pollution on human respiratory system
Autorzy:
Grzywa-Celińska, A.
Krusiński, A.
Milanowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/2085457.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
air pollution
particulate matter
respiratory system
lung disease
Opis:
Atmospheric pollution suspended in humid air is popularly known as ‘smog’. It is composed of dust particles of different sizes, as well as non-metal oxides, organic compounds, and heavy metals. Exposure to harmful substances suspended in the air – apart from, for example – smoking cigarettes, one of the modifiable factors leading to the development of respiratory diseases. There are six types of substances present in the air that have a negative impact on public health and result in significant consequences: ozone, particulate matter (PM) of different diameters – PM2.5µ, PM2.5–10 µ, PM10 µ, nitrogen dioxide, sulphur dioxide, carbon monoxide and lead. Particular attention is given to small dust particles (PM10 and PM2.5) because they can penetrate into the lower respiratory tract. Apart from describing the composition of smog and sources of air pollution, the article also discusses the impact of atmospheric pollutants on both development and aggravation of the symptoms of such respiratory tract diseases as asthma, chronic obstructive pulmonary disease, respiratory infections and lung cancer. Some of legal measures applied in different countries aimed at reducing exposure to noxious air pollutants are reviewed. The authors believe that the increased focus on risks arising from inhaling toxic air pollution may be a first step for developing systemic solutions aimed at resolving or, at least, decreasing those risks.
Źródło:
Annals of Agricultural and Environmental Medicine; 2020, 27, 1; 1-5
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
3-Dimensional Surface Magnetic Susceptibility Distributions with Depth to Investigate Anthropogenic Pollutants Boundary in Abuja Metropolis
Autorzy:
Jatto, S. S.
Sule, P. O.
Ahmed, L. A.
Powiązania:
https://bibliotekanauki.pl/articles/184649.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
vertical distribution
soil pollution
magnetic susceptibility
anthropogenic pollutants
Abuja
Opis:
Changes in the magnetic susceptibility of topsoil, especially in urban areas, are greatly affected by the deposition of anthropogenic metallic dust arising from industrial activities, the burning of fossil fuels, car wear, and tyre abrasion. In this study, magnetic susceptibility measurements were carried out in vertical soil profiles of 30.0 cm depth from the surface at 10.0 cm intervals in about 431 locations within the Abuja metropolis with a view to investigate the penetration ability of magnetic pollutants in the ground. From the obtained data, 3-D surface contour maps were plotted for different depths. The results show a magnetic susceptibility decrease from the surface down the ground to the depth of 30.0cm; most of the recorded susceptibilities were of an anthropogenic origin rather than pedogenic activities. This indicates that the anthropogenic dust depositions are mostly a surface phenomenon and may therefore not pose a risk to groundwater aquifers and near surface wells.
Źródło:
Geology, Geophysics and Environment; 2016, 42, 4; 443-448
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Bioremediation Study of Raw and Treated Crude Petroleum Oil Polluted Soil with Aspergillus niger and Pseudomonas aeruginosa
Autorzy:
Ojewumi, M. E.
Anenih, E. V.
Taiwo, O. S.
Adekeye, B. T.
Awolu, O. O.
Ojewumi, E. O.
Powiązania:
https://bibliotekanauki.pl/articles/124955.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
bioremediation
Aspergillus niger
Pseudomonas aeruginosa
pollution
Opis:
This study was conducted to investigate the degree of bioremediation that would occur in the samples of soil polluted with raw and treated crude petroleum (oil) with the aid of Aspergillus niger (fungi) and Pseudomonas aeruginosa (bacteria). This was achieved by monitoring the Organic carbon content in the soil over 45 days and pH over 25 days. Four systems of 500 g soil were polluted with 40 g treated crude petroleum, while four systems were contaminated with 40 g raw crude petroleum. The eight systems were labeled accordingly. Two systems for raw crude control and treated crude control (RCC and TCC) were left as control, two systems for raw crude Aspergillus niger and treated crude Aspergillus niger (RCA and TCA) were treated with Aspergillus niger only, two systems for raw crude Pseudomonas aeruginosa and treated crude Pseudomonas aeruginosa (RCP and TCP) were treated with Pseudomonas aeruginosa only and the last two systems for raw crude Aspergillus niger and Pseudomonas aeruginosa (RCAP and TCAP) were treated with both Pseudomonas aeruginosa and Aspergillus niger. At the end of the bioremediation period, the results obtained showed that the pH was not particularly a solid parameter to estimate the degree of bioremediation. This is because a proper trend in the results obtained could not be determined. Additionally, it was observed that Aspergillus niger (fungi) and Pseudomonas aeruginosa (bacteria) alone and separate remediate raw crude polluted soil better than treated crude polluted soil. This was determined by the TOC (Total Organic Carbon) values on the 45th day of the experiment.
Źródło:
Journal of Ecological Engineering; 2018, 19, 2; 226-235
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A case study on perceptions of public transportation in the eastern province of Saudi Arabia
Autorzy:
Palmer Peterson, Helen
Al Kassim, Zulfat
Powiązania:
https://bibliotekanauki.pl/articles/1841174.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
public transportation
air pollution
climate change
Saudi Arabia
transport publiczny
zanieczyszczenie powietrza
zmiana klimatu
Arabia Saudyjska
Opis:
The Eastern Province of the Kingdom of Saudi Arabia (KSA) is home to almost 5,000,000 people and is a major contributor to Saudi Arabia’s economic strength. The area has experienced population growth of about 3.5% per year and rapid urbanization over the past few decades. With this increase in population has come a significant escalation in automobile traffic, which, in turn, has contributed to poor air quality in the province. Two of the major cities in the area were listed on the World Health Organization’s 2016 top 15 cities with the worst air pollution. Local studies have shown that vehicle traffic is a significant contributor to poor air quality and thus, eventually, climate change. Public transportation could alleviate some of the pollution. Unfortunately, overall past perceptions of public transportation and its negative connotations within the Saudi Arabian cultural setting have discouraged previous attempts to develop public transit services. Currently, KSA is progressing with metro works in the capital city of Riyadh and is considering what services to offer in the Eastern Province. This research involved surveying over 800 Eastern Province residents to determine whether they would use public transportation if it was offered, and what type of service they would expect. The response was positive and provided initial indications that public transportation is needed and would be utilized.
Źródło:
Transport Problems; 2020, 15, 2; 5-15
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative economic analysis for medical waste treatment options
Autorzy:
Ökten, H. E.
Corum, A.
Demir, H. H.
Powiązania:
https://bibliotekanauki.pl/articles/208038.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
waste treatment
air pollution
economic analysis
incineration
organic pollutants
polychlorinated biphenyls
waste incineration
waste management
air pollutants
medical wastes
utylizacja odpadów
zanieczyszczenie powietrza
analiza ekonomiczna
spopielanie
zanieczyszczenia organiczne
polichlorowane bifenyle
spalanie odpadów
gospodarowanie odpadami
zanieczyszczenia powietrza
odpady medyczne
Opis:
Management practices for medical waste should be conducted using the best available techniques in order to minimize harmful effects of medical waste. Most common practices in Turkey were reported to be burying with lime and incineration. Although incineration stood out as a better option in terms of environmental and public health, it produced air pollutants such as dioxin, furan and co-planar PCBs as a result of incomplete burning of plastics. Consequently three options, namely converter, autoclave, and ozonator technologies were investigated for economic feasibility in the medical waste treatment field. ozonator technology was concluded to be the economically best option.
Źródło:
Environment Protection Engineering; 2015, 41, 3; 137-145
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative study of the performance of a low heat rejection engine with three different levels of insulation with vegetable oil operation
Studium porównawcze osiągów silnika o małych stratach ciepła, napędzanego olejem roślinnym, przy trzech różnych poziomach izolacji cieplnej
Autorzy:
Murali Krishna, M.V.S.
Janardhan, N.
Murthy, P.V.K.
Ushasri, P.
Sarada, N.
Powiązania:
https://bibliotekanauki.pl/articles/139714.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
olej lniany surowy
silnik
małe straty ciepła
moc silnika
LHR-1
LHR-2
LHR-3
poziom zanieczyszczenia
charakterystyka spalania
crude linseed oil
engine
low heat rejection
engine performance
pollution level
combustion characteristics
Opis:
Investigations were carried out to evaluate the performance of a low heat rejection (LHR) diesel engine consisting of different versions, such as ceramic coated cylinder head engine-LHR-1-Air gap insulated piston and air gap insulated liner-LHR-2- and Ceramic coated cylinder head, air gap insulated piston and air gap insulated liner -LHR-3 with degrees of insulation with normal temperature condition of linseed oil with varied injection pressure. Performance parameters were determined at various magnitudes of brake mean effective pressure. Pollution levels of smoke and oxides of nitrogen (NOx) were recorded at the peak load operation of the engine. Combustion characteristics of the engine were measured with TDC (top dead centre) encoder, pressure transducer, console and special pressure-crank angle software package. Conventional engine (CE) showed deteriorated performance, while LHR engine showed improved performance at recommended injection timing of 27 degrees bTDC and recommend injection pressure of 190 bar with vegetable oil operation, when compared with CE with pure diesel operation. Peak brake thermal efficiency increased by 14%, smoke levels decreased by 10% and NOx levels increased by 30% with LHR engine at an injection pressure of 270 bar when compared with pure diesel operation on CE at manufacturer's recommended injection timing.
Wykonano badania mające na celu ocenę osiągów silnika wysokoprężnego o małych stratach ciepła (Low Heat Rejection, LHR). Badano różne wersje izolacji cieplnej, takie jak głowica cylindra z powłoką ceramiczną (LHR-1), tłok i tuleja cylindra izolowane szczelinami powietrznymi (LHT-2), głowica cylindra z powłoką ceramiczną oraz tłok i tuleja cylindra izolowane szczelinami powietrznymi (LHR-3). Badania wykonano dla różnego stopnia izolacji, w normalnych warunkach temperaturowych, przy różnych ciśnieniach wtrysku paliwa (oleju lnianego). Parametry robocze wyznaczono dla różnych wartości ciśnienia użytecznego. Poziomy zanieczyszczeń dymem i tlenkami azotu (NOx) były mierzone w warunkach szczytowego obciążenia silnika. Przy pomiarze charakterystyk spalania silnika wykorzystano koder TDC (górnego martwego punktu), przetwornik ciśnienia, konsolę i specjalny pakiet programowy do wyznaczania zależności ciśnienie - kąt obrotu wału korbowego. Silnik konwencjonalny (CE), napędzany czystym olejem dieslowskim, wykazywał gorsze działanie. W porównaniu z nim, sinik o małych stratach ciepła (LHR), napędzany olejem roślinnym, miał lepsze parametry robocze przy zalecanym kącie wyprzedzenia wtrysku 27 stopni przed GMP i zalecanym ciśnieniu wtrysku 190 bar. Dla silnika typu LHR z optymalnym kątem wyprzedzenia wtrysku i przy maksymalnym zasysaniu etanolu, szczytowa sprawność cieplna była większa o 18%, poziom zawartości dymu mniejszy o 48%, a zawartość tlenków azotu mniejsza o 38% w porównaniu z silnikiem konwencjonalnym (CE), z czystym paliwem dieslowskim, przy zalecanym przez producenta kącie wyprzedzenia wtrysku.
Źródło:
Archive of Mechanical Engineering; 2012, LIX, 1; 101-128
0004-0738
Pojawia się w:
Archive of Mechanical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A generalized method for assessing emissions from road and air transport on the example of Warsaw Chopin Airport
Autorzy:
Wasiak, Mariusz, Jacek
Niculescu, Adrian Ioan
Kowalski, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/230792.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
transport drogowy
transport lotniczy
emisja hałasu
zanieczyszczenie powietrza
koszt zewnętrzny
Lotnisko Chopina
road transport
air transport
noise emission
air pollution
external cost
Warsaw Chopin Airport
Opis:
The article presents a method for assessing emissions of harmful substances and noise from road and air transport, as well as a combined assessment of the emissions of these transport pollutants. The original analytical dependencies reflecting the emissions of harmful substances from road transport, developed as part of the EMITRANSYS project implemented at the Faculty of Transport of the Warsaw University of Technology, were taken into consideration, in which the unit values of the actual road emissions of harmful substances are a function of, among other things, route length or speed of the vehicles. However, the dependencies associated with noise emissions were taken from the applicable international guidelines for assessing environmental pollution by traffic noise. The article also describes a case study in which the impact of Warsaw Chopin Airport on noise along the Warsaw road network and the entire Warsaw agglomeration was assessed. Analyses and discussions were carried out in the scope of the change in transport noise due to air operations carried out in the analysed area. As agreed, the combined impact of road and aircraft noise in the area under study is far more unfavourable than street noise alone. Thus, it can be seen that the assessment of noise levels carried out separately for individual modes of transport (in accordance with applicable regulations) should be supplemented with the assessment of traffic noise from all modes of transport – especially in the case of simulation tests of ecologically friendly changes in the area of transport.
Źródło:
Archives of Civil Engineering; 2020, 66, 2; 399-419
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A guarantee of safety, a cautionary tale or a celebration? Popularity of true crime narratives through the lens of Mary Douglas’s concepts of pollution and defilement
Autorzy:
Antoniak, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/2029230.pdf
Data publikacji:
2021-11-22
Wydawca:
Polskie Towarzystwo Ludoznawcze
Tematy:
fan studies
true crime
Mary Douglas
fandom
Opis:
The fascination with crime, hastily described by some as a symptom of moral degradation of Western culture, seems to be a defence mechanism used by individuals to deal with social transgressions and anomalies represented by serious crimes. The aim of this article is to analyse the growing popularity of true crime through the lens of Mary Douglas’s theory of purity and pollution, with a particular emphasis on the methods of dealing with anomalies appearing within conceptual schemata of a given culture. For this purpose, the text has been divided into four parts: the first part briefly presents the history of true crime; the second part analyses the idea of murder through the lens of Douglas’s theory; the third part discusses the reasons behind the popularity of true crime narratives; and the fourth part showcases how individuals use true crime stories as tools to deal with anomalies.
Źródło:
Literatura Ludowa; 2021, 65, 2; 83-95
2544-2872
0024-4708
Pojawia się w:
Literatura Ludowa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A preliminary assessment of soil sulphur contamination and vegetations in the vicinity of former boreholes on the aff orested post-mine site Jeziórko
Autorzy:
Likus-Cieślik, J.
Pietrzykowski, M.
Sliwińska-Siuśta, M.
Krzaklewski, W.
Szostak, M.
Powiązania:
https://bibliotekanauki.pl/articles/184803.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
reclamation
afforestation
underground melting sulphur mine
pollution of sulphur
Opis:
The work aims to assess the degree of soil sulphur contamination of the various abandoned reclamation efficiencies, within the microhabitats formed in the “Jeziórko” inoperative boreholes of former sulphur-mining areas. These areas have been reclaimed to the forest. Three plot categories were initially determined in the post-mining areas: category D – degraded, i.e. ineffectively reclaimed and unsuccessfully afforested plots, with low cover-abundance or complete lack of vegetation, pine stands category, category (P) – birch stands and category (B) – successfully afforested. Afterwards, four circular plots were defined within each of the determined categories (4 replications, i.e. a total of 12 plots). For each plot, cover-abundance (according to the Braun-Blanquet scale) and dominant herbaceous vegetation species, tree species and stand density were determined. Height (Ht) and diameter at breast height (DBH) measurements were taken, and a vitality assessment was completed, according to the IUFRO classification. Soil samples were collected at each plot, in five points, at two different depths (0–5 cm and 5–40 cm). Finally, laboratory analysis was undertaken. Soil properties such as texture, pH, electrical conductivity (EC), hydrolytic acidity (Hh), the contents of soil organic carbon SOC, total nitrogen TN, total sulphur TS, and exchangeable cations (Ca2+, Mg2+, K+, Na+) were determined. Soils from the D plot category were characterised by high sulphur contamination, excess salinity (EC) and strong acidity in top soil. These parameters indicated that completed neutralization was not performed effectively at certain sites. Pine (P) and birch (B) stands categories showed good growth rates and soil parameters, indicating that the reclamation treatments were completed successfully.
Źródło:
Geology, Geophysics and Environment; 2015, 41, 4; 371-380
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 2124

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