Wszystkie pola: "environment" - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Optical properties of fuels and lubricants vs. aquatic environment protection issues
Autorzy:: Otremba, Z.
Toczek, H.
Powiązania:: https://bibliotekanauki.pl/articles/247174.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: oil film
fuels
lubricants
aquatic environment protection
Opis:: Oils can be optically described by two parameters: light absorption coefficient and light refraction coefficient. Spectrum of absorption coefficient manifests itself in colour of oil, whereas spectrum of refraction coefficient impacts on both refractive and reflective properties of interface between oil and surroundings. Both spectra of absorption coefficient and refraction coefficient have distinctive slopes in ultraviolet edge of spectrum where values of mentioned coefficients decrease from extremely high in ultraviolet to relatively low in visual range. Possibility of perceiving of oil existing in the form of thin film or in the form of an emulsion depends on ambient light conditions and on mentioned optical properties. Additionally perceiving of oil depends on thickness of the oil film and on type of substrate on which oil is spread (water, metal etc.), as well as - if emulsion oil-in-water or water-in-oil is considered - on the droplets size distribution. The present paper begins with a review of optical properties of several oils. Next, an impact of changes of those properties on optical properties of an oil film (spread on water) as well as an impact of those properties on optical properties of oil-in-water emulsion is explained. Finally, exemplary results of numerical simulation of light transfer in marine environment (using above optical properties) - e.g. angular distributions of optical contrast of both sea areas clean and polluted by an oil-film are presented.
Źródło:: Journal of KONES; 2011, 18, 4; 325-330
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Fluorescence spectra of oil after it contacts with aquatic environment
Autorzy:: Baszanowska, E.
Otremba, Z.
Toczek, H.
Rohde, P.
Powiązania:: https://bibliotekanauki.pl/articles/245054.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: oil pollution
fluorescence spectroscopy
excitation-emission spectra
seawater
environment protection
Opis:: The main task for natural marine environment protection is to prevent the inflow of various contaminants including oil substances and the real challenge is the ability to rapidly detect these pollutants. Moreover important is to find the source or the maker of the oil spill. In this paper, we consider fundamental physical aspects in the area of possibility of monitoring the natural marine ecosystem based on fluorescence spectroscopy. We utilize the fluorescence ability of numerous oil components – mainly polycyclic hydrocarbons. The paper concerns the spectrofluorimetric characterization of oils have been in use during exploitation of the marine fleet, i.e. lubricate oil, fuels, transformer and hydraulic oils as well as crude oils or their residues. Every kind of oil has a chance to enter the marine environment, especially in a case of ship emergency or after collision with other vessel ore shoreline structure as well as when ship enters the stranding. After discharge of oil, some of oil components are dissolved in the water, bacteria or photochemical reactions, which results in transformation of composition of oil, degrade some. Fluorescence spectrometer Perkin Elmer LS55 was applied to obtain the fluorescence spectra using different excitation wavelength in the range from 240 nm to 500 nm. We discuss the changes of the shapes of excitationemission spectra (EEMs) of various types of oil and the EEMs spectra after contact of oil with seawater as an oil-inwater emulsion, which is the most frequent form of oil in the water column. Significant changes in the shape of spectra and displacement of the peaks are observed.
Źródło:: Journal of KONES; 2013, 20, 3; 29-34
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: New technical uses of marine space of the Baltic Sea
Autorzy:: Otremba, Z.
Powiązania:: https://bibliotekanauki.pl/articles/248030.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: marine transport
large scale constructions
physical fields
marine environment protection
Opis:: The Baltic Sea area has already been intensively used by variety of maritime economic sectors such as marine transport, fishing, tourism, extraction of sand and gravel and oil and gas exploitation. This is also an area of relatively intense military penetration. In addition, this is a place of various other investments, e.g. coastal technical infrastructure (port and transhipment terminals constructions, as well as technical measures of the shoreline defence against transgression of the sea), electrical energy transmission systems (high voltage cables plus large scale electrodes) and natural gas transmission huge pipelines. Over the next decades, the use of the Baltic Sea will expand rapidly, particularly due to constructions of new coastal and offshore wind farms, electrical energy transfer network, further intensification of various forms of shipping, development and construction of new ports and terminals and installing new oil extraction platforms. Some of these activities influences natural spatial distribution of physical properties of the sea space (such as acoustic field, magnetic field, salinity distribution etc.) as well as disturb different natural processes (such as natural coastal dynamics, sedimentation, migration patterns of mobile species etc). In order to present this problem, most important existing activities as well as the most recent large-scale constructions in the Baltic Sea are selected and presented in this study (with emphasis on the Polish Exclusive Economic Zone). Moreover most likely disturbances of natural distributions of physical properties of marine space are analyzed in light of the impact on the environment
Źródło:: Journal of KONES; 2012, 19, 1; 311-318
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Oil identification based on total synchronous spectra
Autorzy:: Baszanowska, E.
Otremba, Z.
Powiązania:: https://bibliotekanauki.pl/articles/246342.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: fluorescence spectroscopy
total synchronous spectra
lubricate oil
vessel engine room
marine environment
Opis:: Contribution of marine carriage in the global transport is in permanent developing. It leads to increase the unintentional oil spills, which may induce serious disturbances in functioning of the natural marine ecosystem, especially when it interferes with other technical activities in the marine space. That fact contributes to increase the interest in searching of new research techniques to protect the natural ecosystem. Therefore, the main task of marine international organisations concentrates on the effective and rapid detection of oil spill and on the possibility of identifying oil pollutants as well as on origin of pollution. The purpose of the study is to characterise the oil belonging to the vessel engine lubricate oils. We analyse the stage results of investigations based on one of types of fluorescence spectroscopy, namely: synchronous spectra. To characterise the oil, the Aqualog Horiba spectrofluorometer was applied, which allows performing precise measurement in a short time. Based on the measured excitation-emission spectra, total synchronous fluorescence spectra for oil were obtained using various wavelength intervals. Total synchronous fluorescence spectra of petroleum substances allow finding wavelength interval typical for particular type of oil. This approach could allow obtaining of complex mixtures, such as oils, more efficient description. We discuss the total synchronous fluorescence spectra for engine oil (Marinol type) dissolved in n-hexane in various concentrations of oil as a possible tool proposed to oil type identification. We present changes and variation of the total synchronous fluorescence spectra for oil with various oil concentrations.
Źródło:: Journal of KONES; 2014, 21, 2; 15-20
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Spectrofluorymetry in application to oil-in-water emulsion characterization
Autorzy:: Otremba, Z.
Baszanowska, E.
Toczek, H.
Powiązania:: https://bibliotekanauki.pl/articles/246063.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: oil
fuels
lubricants
aquatic environment protection
fluorescence spectra
Opis:: The question of identifying the type of oil in exploitation of engine room is associated with both the quality of ship consumables (fuels and lubricants) and the composition and origin of oil in settling tanks or in dumping water. Related issue is the possibility of determining the origin of oil, which is detected in the marine environment. The key question is how oils vary in their ability to fluorescence, understood as the shapes of fluorescence spectra obtained for different wavelengths of light exciting fluorescence. In this paper we present spectra of fluorescence for six chosen oils. Those oils were previously dispersed (emulsified) in the seawater, then extracted into hexane. Fluorescence spectra were obtained using fluorescence spectrometer Perkin Elmer LS55, for excitation wavelengths in the range from 240 nm to 500 nm, and emission wavelengths from 300 nm to 790 nm. In this paper there is shown that in general both total intensity of fluorescence and shapes of spectra of fluorescence depend on the excitation wavelength and are differ for various kinds of oil. In order to visually show the differences in fluorescence abilities of various oils, the results of measurement were placed on a chart of fluorescence intensities in the function of both variables: the excitation wavelength and the emission wavelength (so called the total fluorescence spectra). Analyses of results of the described studies confirm that the different oils fluoresce differently and identification of type of oil is possible by fluorescence spectrophotometry.
Źródło:: Journal of KONES; 2011, 18, 3; 317-321
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Comparison of fluorometric signatures of oil residues in both marine environment and in organic diluent
Autorzy:: Otremba, Z.
Baszanowska, E.
Powiązania:: https://bibliotekanauki.pl/articles/243211.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: oil pollution
seawater
excitation-emission spectra
fluorescence spectroscopy
Opis:: The significant part of petroleum substances is transferred to the marine environment after technical activities (inevitable exploitive spills, illegal discharges). However a certain part of petroleum in seawater coming from the natural sources. Therefore, to develop the safety of natural marine environment it is necessary to track not only the anthropogenic pollutants but also the natural sources of petroleum. To distinguish both source of oil the fluorescence properties of oil can be used as the tools to oil identification. The aim of the study is to describe the optical properties of crude oil after it contact with aquatic environment based on fluorescence spectroscopy. For the study, crude oil ‘Petrobaltic’ type potentially found in marine environment due to coming from natural source was applied. To dissolve oil, two different solvent – hexane and Baltic seawater form the Gdynia coast were used. To measure the excitation-emission spectra (EEMs) of oil spectrofluorometer Hitachi F-7000 FL was applied. In the paper, we discuss the changes of oil EEMs in two cases for oil dissolved in n-hexane and for oil dissolved in seawater for various oil concentration. Obtained EEMs for oil dissolved in seawater indicate that EEMs spectrum contain the main peak – describing by the wavelength – independent fluorescence maximum, which was detected for oil dissolved in n-hexane (typical for this kind of oil). However, the intensity of oil fluorescence decreases after oil contact with seawater. This approach could allow expanding the description of complex mixtures of oils as a possible tool proposed for identification the type and origin of oil found in marine environment.
Źródło:: Journal of KONES; 2015, 22, 3; 175-179
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Adoption of the time resolved fluorescence to oil type identification
Autorzy:: Baszanowska, E.
Otremba, Z.
Rohde, P.
Zieliński, O.
Powiązania:: https://bibliotekanauki.pl/articles/247122.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: oil
fuels
lubricants
aquatic environment protection
time-resolved fluorescence
diagnostics
Opis:: The present development of a basic science, including physics of stimulated emission of light, opens up new diagnostic possibilities in relation to the quality of oils, including marine fuels and lubricants. In complicated chemical composition of oils both light absorbing compounds and compounds that emit light (fluorescent) are included. This causes the formation of complex structures in the spectral plots of fluorescence intensity as a function of wavelength of light exciting fluorescence and as a function of the wavelength of light emitted. Since the fluorescence excitation occurs in a short time of its disappearance. The shape of the fluorescence decay function depends on the chemical composition of oil, therefore, includes a mention of its kind, quality, level of degradation, and the like. In this paper exemplary charts of the intensity decay curves in different parts of the fluorescence spectra are shown (for light fuel). Presented charts are obtained using the experimental device constructed in Bremerhaven University of Applied Sciences (Germany) and are the attempt to use ability of oil substance to manifest its composition in the form of the fluorescence decay curve. An analysis of the chart shows that decay of fluorescence in this case is described by biexponential curve, therefore a kind of oil can be represented by two numerical values - two decay time constants. Operational use of this method will be possible only after a comparative study of different types and quality of oil in relation to the shape of the fluorescence decay curves.
Źródło:: Journal of KONES; 2011, 18, 2; 25-29
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Physical fields during construction and operation of wind farms by example of Polish maritime areas
Autorzy:: Otremba, Z.
Andrulewicz, E.
Powiązania:: https://bibliotekanauki.pl/articles/260016.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: marine environment
wind farms
physical field
large scale constructions
marine spatial planning
Opis:: The article discusses an important issue of technical pressure exerted on the marine environment during construction and operation of maritime wind farms (MFW) on waters of the Polish Exclusive Economic Zone. A motivation for analysing this issue is the need for attracting attention to the aspect of physical field modification as the factor which links large scale technical activity at sea with the existence and functioning of the marine ecosystem, including further consequences to its economic benefits. Based on current knowledge and authors’ analyses, the scale of modifications (disturbances) of physical fields expected to take place during MFW construction and operation was assessed.
Źródło:: Polish Maritime Research; 2014, 4; 113-122
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Non-navigational Uses of the Sea Space: The Baltic Sea Case
Autorzy:: Otremba, Z.
Powiązania:: https://bibliotekanauki.pl/articles/116738.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Baltic Sea, Sea Space
Technical Activity at Sea
Marine Environment
Offshore Technology
Non-Navigational Activity
Wind Energy
Oil and Gas Industry
Opis:: Some parts of the global ocean, apart from their traditional use (maritime transport, fishery, navy), becomes suitable for other technical activities and investments (e.g. gas and electricity transmission, wind farms, gas and oil extraction, gravel extraction, coastal protection). These activities interact with marine environment as well as can interfere with navigation. This paper presents relating to the Baltic Sea large scale technical activities as well as points up their possible individual environmental effects.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2013, 7, 4; 619-623
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Test of the suitability of chosen materials in terms of their use for removing oil spillage from the water environment
Autorzy:: Guźlińska, E.
Kończewicz, W.
Otremba, Z.
Trojnar, D.
Powiązania:: https://bibliotekanauki.pl/articles/241568.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: sorbents
fuel
seawater
maritime engineering
environmental protection
Opis:: The paper presents the study about impregnability of various loose materials dedicated as the fillers of oil absorbent socks and booms. Purpose of the survey was finding the material, which is characterized with the smallest hygroscopicity and the highest absorptivity towards typical fuels used in the marine techniques. The cause of take up the topic is the fact, that the contamination of sea areas with petroleum substances are unfortunately very often, are dangerous for natural environment and first of all are so hard to remove from the sea surface. The natural, mineral and synthetic sorbents were studied under laboratory conditions. Samples of the ten kinds of sorbent, each of 2 grams, were treated with the same amount of the diesel fuel, heavy fuel oil and the sea water also, each time in the same period-time (5 minutes). In order to determine the reliability of the results the authors carried out the test fivefold for the one of searched sorbents (recognized as the most hydrophobic-oleophilic substance). The results are presented in graphical form, based on which we are able to select sorbent that fulfils the greatest extent of required expectations. The results of performed tests show that the method that was described in the paper could be used to test the suitability of various materials for the production of devices for collecting the oil film from the surface of the water.
Źródło:: Journal of KONES; 2016, 23, 3; 171-176
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Modelling the bidirectional reflectance distribution functions (BRDF) of sea areas polluted by oil
Autorzy:: Otremba, Z.
Powiązania:: https://bibliotekanauki.pl/articles/49118.pdf
Data publikacji:: 2004
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: marine environment
radiance
petroleum industry
modelling
oil
pollution
remote sensing
oil pollution
oil emulsion
bidirectional reflectance distribution function
sea
oil-water emulsion
marine area
Opis:: The paper discusses the possibilities of modelling the bi-directional reflectance distribution function (BRDF) in sea areas polluted by oil. Three sea basin models are considered: a coastal one free of oil, one polluted by an oil film and one polluted by an oil emulsion. The following concentrations of oil were compared: for the film, 1 cm3 of oil per 1 m2 water surface, for the emulsion 1 cm3 of oil in 1 m3 of water. The optical properties of Romashkino crude oil were taken into consideration, as were various angles of incident solar light. The conversion of BRDFs into a directional distribution of the optical contrast of polluted areas is demonstrated.
Źródło:: Oceanologia; 2004, 46, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 12.

Tytuł:: Maritime transport other than shipping: electrical energy case
Autorzy:: Otremba, Z.
Andrulewicz, E.
Jakubowska, M.
Powiązania:: https://bibliotekanauki.pl/articles/241948.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: maritime transport
submarine energy transfer
marine environment
wind farm
Polish Exclusive Economic Zone
transport morski
podmorski transfer energii
środowisko morskie
farma wiatrowa
polska specjalna strefa ekonomiczna
Opis:: Large demand for energy results in necessity for its transportation in various ways. On land areas, energy media transfer consists mainly of transport in tanks by rail, road or river routs as well as pipeline systems for liquid or gasified hydrocarbons. A part of energy media in the world is electric energy flowing though metallic conductors of overhead and cable networks. If sea areas are considered, ship navigation routs crosses with pipelines and electrical energy transfer systems. Furthermore, every transport system can interfere with other. Marine areas occupied by pipelines and submarine cables must be excluded from use of anchors and bottom fishing gear. On the other hand, pipeline systems interfere with the free development of navigation, particularly in areas near ports. Power transfer systems modify the natural force fields in the water column, surface water and even in near-water layer of atmosphere. In this article, we show the main ways of transferring electricity in the sea and the resulting modifications of physical fields: electrical, magnetic and electromagnetic ones. We also discuss the probable impact of modifications of natural fields on ship traffic as well as corrosion of hulls of ships and marine structures. The considerations presented in the article are related primarily to the Polish Exclusive Economic Zone of the Baltic Sea.
Źródło:: Journal of KONES; 2017, 24, 1; 275-280
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę ""environment"" wg kryterium: Wszystkie pola

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język