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Wyświetlanie 1-15 z 106
Tytuł:
Wykorzystanie UAV w nawigacji
The use of UAVs in navigation
Autorzy:
Świerczyński, Sławomir
Zwolan, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/315241.pdf
Data publikacji:
2019
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
UAV
drony
nawigacja
środowisko morskie
drones
navigation
sea environment
Opis:
Na przestrzeni ostatnich lat nastąpił bardzo dynamiczny rozwój bezzałogowych jednostek, które są wykorzystywane niemal w każdej dziedzinie życia. W artykule przedstawiono możliwości wykorzystania UAV w szeroko pojętej nawigacji, jak możemy korzystać z dronów w środowisku morskim, obserwować porty, prowadzić misje na morzu, jak robić mapy dna morskiego i jakie korzyści z dronów ma środowisko wojskowe.
Over the past years, there has been a very dynamic development of unmanned aerial vehicles that are used in almost every area of life. The article presents the possibilities of using UAVs in the broadly understood navigation, how to use drones in the sea environment, observe ports, conduct missions at sea, how to make seabed maps and how drones are used in the army.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2019, 20, 12; 210-214
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A cost-effective method for estimating long-term effects of waves on beach erosion with application to Sitia Bay, Crete
Autorzy:
Karathanasi, F.E.
Belibassakis, K.A.
Powiązania:
https://bibliotekanauki.pl/articles/47505.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
beach
erosion
sea environment
hydrodynamic process
seabed
sediment transport
long-term effect
Sita Bay
Crete
Źródło:
Oceanologia; 2019, 61, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of power demand for ship motion control system of sea mining ship fitted with tubular winning system
Autorzy:
Bortnowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/260362.pdf
Data publikacji:
2007
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
sea mining ship
tubular winning system
action of sea environment
thrust of ship propellers
power of ship motion control system
Opis:
One of the crucial systems of sea mining ship for poly-metallic concretions is its motion control system (SMC). Power of such system depends on sea environment characteristics and main dimensions of the ship. It can be expected that it will have important influence on total power of the ship’s power plant and in effect on the mining ship’s dimensions. In this paper is presented one of the possible ways of preliminary estimation of design power of SMC system for sea mining ship. Since details of design solution of such system for the ship in question are unknown (ships of the kind have not been built so far) the presented results should be considered to be the first estimation of the order of the power demand.
Źródło:
Polish Maritime Research; 2007, 4; 24-30
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigations of mechanical properties of API P110 steel casing tubes operated in deep-sea sour condensate well conditions
Autorzy:
Yao, Zilin
Wang, Yu
Yang, Xuefeng
Gao, Anping
Zhang, Rong
Jia, Yanjie
Powiązania:
https://bibliotekanauki.pl/articles/1585020.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
deep-sea drilling environment
mechanical properties
yield strength
tensile strength
corrosion modeling
Opis:
Due to the complexity of the marine environment, in deep-sea drilling, all kinds of strings are corroded by different deepsea conditions for a long time, accompanied by high temperature and high pressure, which lead to the continuous change of mechanical properties of materials. In order to solve the problem that the material mechanical parameters cannot be accurately described in the performance analysis of the casing, deep-sea simulated corrosion and material damage experiments of P110 material were carried out in this paper. Mass loss and tensile experiments on corrosion-damaged test pieces were conducted under different corrosion experimental periods. The changes in mechanical properties of the material were analyzed. Equations of the variation of the equivalent yield strength and the equivalent tensile strength were obtained. The results show that the equivalent yield strength and the equivalent tensile strength decrease with the increase of the weight loss rate. Based on the experimental results and finite element analysis, a method for establishing the material corrosion model was proposed in this paper. The deep-sea drilling corrosion performance model of P110 material was established, which greatly reduced the error caused by the material uniformity assumption in finite element analysis. This paper provides a theoretical basis for the analysis of reliability and life of P110 materials in wells.
Źródło:
Polish Maritime Research; 2020, 3; 121-129
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radio link system solutions for mobile platforms operating in sea environment
Rozwiązania systemowe łączy radiowych dla platform mobilnych operujących w środowisku morskim
Autorzy:
Stępień, J.
Kabacik, P.
Powiązania:
https://bibliotekanauki.pl/articles/222510.pdf
Data publikacji:
2018
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:
radio link budget
marine radio communication
wave propagation model at sea environment
antenna array
phase-shift beam control
sectorization
safety at sea
bilans łącza radiowego
radiokomunikacja morska
model propagacyjny fali w warunkach morskich
szyk antenowy
sterowanie wiązką
sektoryzacja
bezpieczeństwo na morzu
Opis:
In this paper radio link system solutions operating in 300 MHz—3000 MHz range and sea environment were described. Solutions with more than one frequency and wave propagation models for horizontal not more than 50 km and far range were described. In the paper the results of actions taken design and construction solutions adopted were presented, aimed to contribute to ensure the reliability of the system, among other things, by implementing mechanisms for collecting and processing information. This solutions allow resources management to automatically adjust the transmission parameters configuration to the bitrate and range requirements. Available configurations can be extended with active part and electronic beam steering with one or more beams. The paper describes antenna systems ability of transmission parameters adaptation to get the range required.
W artykule przedstawiono rozwiązania systemowe mobilnych łączy radiowych pracujących w zakresie częstotliwości 300 MHz—3000 MHz w środowisku morskim. Zaprezentowano rozwiązania dla wybranych częstotliwości z uwzględnieniem modeli propagacyjnych sygnałów dla zasięgów horyzontalnych do 50 km oraz dalekich. Przedstawiono szereg działań projektowych oraz przyjętych rozwiązań konstrukcyjnych zapewniających niezawodność systemu, między innymi mechanizm zbierania i przetwarzania informacji. Rozwiązania te pozwalają na zarządzanie zasobami w sposób automatyczny oraz w pewnym zakresie autonomiczny, dostosowując konfigurację parametrów transmisyjnych do aktualnych wymagań na przepływność i zasięg. Konfiguracje mogą zostać rozszerzone między innymi o część aktywną oraz sterowanie jedną lub kilkoma wiązkami.
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2018, R. 59 nr 3 (214), 3 (214); 75-86
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Marine forecast system in maritime institute for aiding salvage actions and economical activities in the sea. Present state of development
Autorzy:
Kałas, M.
Staśkiewicz, A.
Gajewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1920535.pdf
Data publikacji:
2000
Wydawca:
Instytut Morski w Gdańsku
Tematy:
forecast
marine environment
sea
Opis:
In the paper the system of digital marine forecast, covering the Polish area of the Baltic Sea, developed in the Department of Operational Oceanography, Maritime Institute, for the needs of rescue services and marine administration, is described. The present system uses data from different Polish and foreign operational centres, and generates its own forecast, as it is in the case of wind waves or object drift. The combined forecast is processed into the formats demanded by the services and is available also in Internet at Department 's web site.
Źródło:
Biuletyn Instytutu Morskiego w Gdańsku; 2000, 27, 2; 51-65
1230-7424
2450-5536
Pojawia się w:
Biuletyn Instytutu Morskiego w Gdańsku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
General Model of Critical Infrastructure Accident Consequences Application to Chemical Spill Consequences Generated by Dynamic Ship Critical Infrastructure Network Operating at the Baltic Sea Waters. Part 2. Process of Environment Threats
Autorzy:
Bogalecka, M.
Kołowrocki, K.
Powiązania:
https://bibliotekanauki.pl/articles/2068802.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
Baltic Sea region
critical infrastructure
sea accident
accident consequences
environment threats
Opis:
In the paper, the process of environment threats at the Baltic Sea area identification is performed. Next, the main characteristics of this process are predicted.
Źródło:
Journal of Polish Safety and Reliability Association; 2017, 8, 3; 123--130
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
General Model of Critical Infrastructure Accident Consequences Application to Chemical Spill Consequences Generated by Dynamic Ship Critical Infrastructure Network Operating at the Baltic Sea Waters. Part 3. Process of Environment Degradation
Autorzy:
Bogalecka, M.
Kołowrocki, K.
Powiązania:
https://bibliotekanauki.pl/articles/2068809.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
Baltic Sea region
critical infrastructure
sea accident
accident consequences
environment degradation
Opis:
In the paper, the process of environment degradation at the Baltic Sea area identification is performed. Next, the main characteristics of this process are predicted.
Źródło:
Journal of Polish Safety and Reliability Association; 2017, 8, 3; 131--138
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling critical infrastructure accident consequences – an overall approach
Autorzy:
Bogalecka, M.
Kołowrocki, K.
Powiązania:
https://bibliotekanauki.pl/articles/2068995.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
critical infrastructure
sea accident
accident consequences
initiating events
environment threats
environment degradation
Opis:
In the paper the probabilistic general model of critical infrastructure accident consequences (GMCIAC) including the process of initiating events, the process of environment threats and the process of environment degradation models is proposed. Next, the methods of its parameters statistical identification are presented. Futher, the marine traffic across the world and sea accidents were observed. Their initiating events and environment threats coming from released chemical substances as well as environment degradations in the neighbourhood region of sea accident were analysed. Then, the process of initiating events, the process of environment threats and the process of environment degradation were analysed and their states are distinguised.
Źródło:
Journal of Polish Safety and Reliability Association; 2016, 7, 3; 1--14
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Light scattering in Baltic crude oil - seawater emulsion
Autorzy:
Stelmaszewski, A.
Krol, T.
Toczek, H.
Powiązania:
https://bibliotekanauki.pl/articles/47707.pdf
Data publikacji:
2009
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
marine environment
sea water emulsion
Baltic Sea
light scattering
sea water
Baltic crude oil
petroleum
Opis:
The paper discusses the scattering of radiation by a Baltic crude oil –sea water emulsion. The scattering spectrum calculated using the Mie solution in the spectral range from 380 nm to 730 nm is compared with the measured spectrum of light scattered through a right angle. Spectra in the wavelength range from 210 nm to 730 nm were measured using a spectrofluorimeter for fresh and stored samples of the Baltic crude oil emulsion. Scattering increases with wavelength in the UV range and then decreases slightly with the wavelength of visible light. The result of the calculation is similar to the measured spectra. Both the calculated and measured spectra display numerous relative extremes throughout the spectral area. Light scattering in the emulsion decreases during storage as the oil concentration in the medium diminishes. The results also demonstrate that the single scattering model describes the phenomenon correctly.
Źródło:
Oceanologia; 2009, 51, 3; 405-414
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Summer distribution patterns of Trichodesmium spp. in the Changjiang (Yangtze River) Estuary and adjacent East China Sea shelf
Autorzy:
Jiang, Z.
Chen, J.
Zhou, F.
Zhai, H.
Zhang, D.
Yan, X.
Powiązania:
https://bibliotekanauki.pl/articles/47907.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Trichodesmium
Yangtze River
estuary
China Sea
trichome
biogeochemistry
environment parameter
sea surface temperature
salinity
Opis:
To examine the distribution of Trichodesmium relative to physicochemical factors during summer in the Changjiang (Yangtze River) Estuary and adjacent East China Sea shelf, three cruises were conducted separately in June 2009, July 2011, and August 2009. Trichodesmium species found were T. thiebautii, T. erythraeum, and T. hildebrandtii. The population was dominated by T. thiebautii, which accounted for >85% of the samples found. Most of them were free trichomes. Colonial forms were rarely observed (approximately 10% of our samples), occurring only in offshore waters. The depth integrated abundances of Trichodesmium were 308 × 103, 1709 × 103, and 3448 × 103 trichomes m−2 in June, July, and August, respectively. Trichodesmium was distributed abundantly in the southern or southeastern part of our study area, where nutrients were low and light penetration, temperature, and salinity were high, which were influenced by the Taiwan Warm Current (TWC) and Kuroshio. Trichodesmium was found in low abundance in inshore, eutrophic, low-salinity waters, which were mainly controlled by the Changjiang Diluted Water (CDW) and coastal current. These results suggest that spatiotemporal changes in the summer Trichodesmium distribution correlate highly with the variations in physicochemical properties that are primarily controlled by the TWC, Kuroshio, and CDW. The summer N2 fixation rate of Trichodesmium was estimated at 12.3 μmol N m−2 d−1 in our study area, contributing >50% of biological N2 fixation.
Źródło:
Oceanologia; 2017, 59, 3
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The process of sea environment threats generated by hazardous chemicals release
Autorzy:
Bogalecka, M.
Kołowrocki, K.
Powiązania:
https://bibliotekanauki.pl/articles/2069318.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
sea accident
pollution
dangerous goods
properties of chemicals
environment threats
Opis:
The kinds of threats coming from chemicals released as a result of sea accident are distinguished. An exemplary procedure of defining states of the sea environment threats process generated by hazardous chemicals is presented. The interrelation between the sea environment threats and this environment degradation process is discussed and finally, a preliminary approach to a general modelling and prediction of the process of the environment threats caused by the process of initiating events generated by critical infrastructure accidents is presented.
Źródło:
Journal of Polish Safety and Reliability Association; 2015, 6, 1; 67--76
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Prevailing Weather and Traffic Conditions in the Evaluation of a Future ECA in the Mediterranean Sea. A view into the Western Mediterranean
Autorzy:
Castells, M.
Martínez-Osés, F. X.
Powiązania:
https://bibliotekanauki.pl/articles/116879.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Traffic Condition
Weather Condition
Mediterranean Sea
maritime transport
Environment Protection
Opis:
Appendix III of MARPOL´s Annex VI sets out the criteria and procedures for designating an emission control area (ECA).These criteria includes: a clear delineation of the proposed ECA; types of emissions proposed for control, land and sea areas at risk; emission quantification and impact assessment; prevailing weather conditions; data and quality on marine traffic; land based measures concurrent with the ECA adoption and the relative costs of reducing emissions from ships. This paper analyses the climate parameter together with traffic conditions: prevailing weather conditions as a parameter to be kept in mind for the adoption of a future ECA in the Mediterranean Sea. Preliminary results would show how marine emissions coming from existing traffic will impact the sea and land ecology in the Mediterranean area.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2014, 8, 1; 157-163
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of humic substances isolated from a variety of marine and lacustrine environments on different microorganisms
Autorzy:
Kupryszewski, G.
Pempkowiak, J.
Kedzia, A.
Powiązania:
https://bibliotekanauki.pl/articles/48478.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
marine environment
humic substance
sea water
lacustrine environment
microorganism
antimicrobial activity
bottom sediment
lake water
Opis:
The antimicrobial activity of twelve preparations of humic substances isolated from sea water, marine bottom sediments and lake water was examined. Humic substances from marine bottom sediment samples were fractionated into humic and/or fulvic acids. The susceptibility of 11 strains of anaerobic, 8str ains of aerobic bacteria and 2 strains of yeast-like fungi to preparations of humic substances, humic and/or fulvic acids was determined employing the plate dilution technique in Brucella agar (anaerobic bacteria), Mueller-Hinton agar (aerobic bacteria) and Sabouraud agar (yeast-like fungi). Concentrations from 150 to 600 μg ml−1 of the preparations examined inhibited the growth of numerous microorganisms (Table). The results obtained seem to indicate that humic substances are involved in the self-purification of sea and lake waters.
Źródło:
Oceanologia; 2001, 43, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimization of critical infrastructure accident consequences related to cliamte-weather change process influence - losses minimizing
Autorzy:
Bogalecka, M.
Kołowrocki, K.
Powiązania:
https://bibliotekanauki.pl/articles/2068761.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
critical infrastructure
sea accident
environment degradation
cost of accident consequences
Opis:
The methods based on the results of the General Model of Critical Infrastructure Accident Consequences and the linear programming are proposed to the optimization of critical infrastructures accident consequences with considering the climate-weather change process influence. The critical infrastructure accident consequences determining the optimal values of limit transient probabilities at the process of environment degradation states that minimize the critical infrastructure accident expected value of the total environment losses impacted by the climate-weather change for the fixed time interval are proposed.
Źródło:
Journal of Polish Safety and Reliability Association; 2018, 9, 1; 11--16
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 106

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