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Wyniki wyszukiwania dla: RUSSEL ACKOFF
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Propulsion system with a hydraulic transmision for a low draught inland vessel
PublikacjaW artykule przedstawiono założenia i uwarunkowania techniczne oraz projekt koncepcyjny dwóch wariantów układu napędowego statku śródlądowego o małym zanurzeniu. Oba warianty dotyczą systemu Diesel-hydraulicznego, przy czym pierwszy - z tradycyjną, poziomą linią wałów i śrubami stałymi w wychylnych dyszach Korta, a drugi - z pędnikami azymutalnymi. Projekt zawiera schemat systemu napędowego oraz wizualizację rozmieszczenia podstawowych...
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Analysis of magnetic field inside of vessel during degaussing process
PublikacjaPole magnetyczne wewnątrz okrętu podczas procesu demagnetyzacji może być niebezpieczne dla urządzeń elektronicznych. Demagnetyzacja okrętu jest przeprowadzana w celu minimalizacji namagnesowania stałego. W pracy przedstawiono wyniki analizy pola magnetycznego wewnątrz okrętu podczas procesu demagnetyzacji. Analizę numeryczną przeprowadzono w pakiecie OPERA 3D.
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Unsymmetrical movements of a multi-hull vessel treated as a linear object
PublikacjaW artykule przedstawiona została analiza dynamiki wybranych morskich obiektów pływających reprezentujących wielokadłubowe jednostki pływające. Badany obiekt został przedstawiony jako liniowy układ dynamiczny o sześciu stopniach swobody. Powyższa analiza dotyczy równań różniczkowych opisujących ruchy niesymetryczne statku na fali. Układ stochastycznych równań różniczkowych dla sprzężonych ruchów niesymetrycznych został przedstawiony...
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Rosja mentalna Miłosza [C. Miłosz’s Russia as a Mental Concept]
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Concentration of bioactive compounds in mussels Mytilus galloprovincialis as an indicator of pollution
PublikacjaOznaczano zawartość związków cynoorganicznych oraz ksenobiotyków z grupy PCB i WWA w tkankach małży pochodzących z obszarów zanieczyszczonych i niezanieczyszczonych z regionu Mokpo Bay (Korea).Wyżej wymienione związki mogą być traktowane jako wskaźniki antropopresji.
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The stability of a damaged roll-on roll-off vessel with water on deck
PublikacjaPrzeprowadzono analizę stateczności statku ro-ro w stanie awaryjnym z wodą na pokładzie. Pokazano, że moment przechylający związany jest z wypiętrzeniem wody na pokładzie ponad poziom wody zaburtowej, pochodzącym od fali. Omówiono trzy metody wyznaczania kąta przechyłu, wywołanego wodą na pokładzie. Zidentyfikowano krytyczne wypiętrzenie wody, przy którym następuje utrata stateczności statku.
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Case study of masts damage of the sail training vessel POGORIA
PublikacjaArtykuł przedstawia opis i analizę przyczyn zdarzenia polegającego na utracie masztów w lipcu 2009 przez barkentynę sts ''POGORIA'' w trakcie regat Tall Ships Race 2009. Przedstawiono podstawowe okoliczności stanowiące tło zdarzenia, dokonano anlizy przyczyn w skali globalnej, zaprezentowano analizę szczegółową utraty nośności konstrukcji stalowej, a na tym tle wypunktowano szczegółowe przyczyny leżące u źródeł wypadku. We wnioskach...
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On the differential effect of temperature on the Nusselt-Rayleigh relationship in free convection
PublikacjaThe aim of and inspiration behind this paper was to explain the reasons, also observed by other researchers, of the discrepancy in the results of experimental free convection, which for small Rayleigh and Nusselt numbers in the initial phase of research can sometimes reach several hundred percent. These discrepancies decrease with increasing heating power and plate surface temperature, in proportion to the increase in Ra and Nu,...
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Analysis of data fusion algorithms for the vessel with the dynamic positioning system
PublikacjaThe dynamic positioning (DP) system on the vessel is operated to control the position and heading of the vessel with the use of propellers and thrusters installed on the board. On DP vessels redundant measurement systems of position, heading and the magnitude and direction of environmental forces are required for safety at sea. In this case, a fusion of data is needed from individual measurement devices. The article proposes a...
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Computational Methods for Liver Vessel Segmentation in Medical Imaging: A Review
PublikacjaThe segmentation of liver blood vessels is of major importance as it is essential for formulating diagnoses, planning and delivering treatments, as well as evaluating the results of clinical procedures. Different imaging techniques are available for application in clinical practice, so the segmentation methods should take into account the characteristics of the imaging technique. Based on the literature, this review paper presents...
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Mir Rossii-Universe of Russia
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Urologiia (Moscow, Russia : 1999)
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Psychology in Russia-State of the Art
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Morfologiia (Saint Petersburg, Russia)
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South of Russia: Ecology, Development
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Rosja Aleksandra Wata – Czesławowi Miłoszowi ukazana [Wat’s and Miłosz’s Russia]
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Evaluation of bioconcentration and metabolism of diclofenac in mussels Mytilus trossulus - laboratory study
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Application of Square Msplit Estimation in Determination of Vessel Position in Coastal Shipping
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Application of an Autonomous/Unmanned Survey Vessel (ASV/USV) in Bathymetric Measurements
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DESIGNING OF PARKING SPACES TAKING INTO ACCOUNT THE PARAMETERS OF DESIGN VEHICLES IN RUSSIA
PublikacjaNowadays, in all the cities, there is an acute problem of a lack of parking spaces. The number of vehicles are becoming more and more larger, not only in megacities, but in small cities of the country, as well and there are no more parking places - the pace of solving the problem is several times slower than the rate of the transport growth among the citizens. The article is dedicated to the determination of the optimum sizes parking...
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DETERMINATION OF SEAKEEPING PERFORMANCE FOR A CASE STUDY VESSEL BY THE STRIP THEORY METHOD
PublikacjaThe increase of seakeeping performance is of particular importance for car and passenger ferries, service ships in the gas and oil extraction industry and offshore wind power farm industry, as well as for special purpose ships (including military applications). In the water areas of the Baltic Sea, North Sea, and Mediterranean Sea, which are characterised by a short and steep wave, the hull shape has a substantial impact on the...
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ENERGY EFFICIENT AND ENVIRONMENTALLY FRIENDLY HYBRID CONVERSION OF INLAND PASSENGER VESSEL
PublikacjaThe development and growing availability of modern technologies, along with more and more severe environment protection standards which frequently take a form of legal regulations, are the reason why attempts are made to find a quiet and economical propulsion system not only for newly built watercraft units, but also for modernised ones. Correct selection of the propulsion and supply system for a given vessel affects significantly...
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Static Shape and Stress Control of Trusses with Optimum Time, Actuators and Actuation
PublikacjaTraditional shape and stress control of structures use many actuators and require enormous time to find reasonable solutions that need designers to input specific target displacement and stress. This study employs a linear technique to static shape and stress control of pin-jointed assemblies as a theoretical advancement to prior works and provides a comparative analysis against previously established works. The study evaluates...
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Spatial Visualization Based on Geodata Fusion Using an Autonomous Unmanned Vessel
PublikacjaThe visualization of riverbeds and surface facilities on the banks is crucial for systems that analyze conditions, safety, and changes in this environment. Hence, in this paper, we propose collecting, and processing data from a variety of sensors—sonar, LiDAR, multibeam echosounder (MBES), and camera—to create a visualization for further analysis. For this purpose, we took measurements from sensors installed on an autonomous, unmanned...
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Buckling and shape control of prestressable trusses using optimum number of actuators
PublikacjaThis paper describes a method to control the nodal displacement of prestressable truss structures within the desired domains. At the same time, the stress in all members is unleashed to take any value between the allowable tensile stress and critical buckling stress. The shape and stresses are controlled by actuating the most active members. The technique considers the members’ initial crookedness, residual stresses, and slenderness...
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Universal autonomous control and management system for multipurpose unmanned surface vessel
PublikacjaThe paper presents design, structure and architecture of the Universal Autonomous Control and Management System (UACAMS) for multipurpose unmanned surface vessel. The system was designed, installed and implemented on the multipurpose platform - unmanned surface vessel named HydroDron. The platform is designed to execute hydrographic survey missions with multi-variant configuration of the survey system (payload? ) including multi-beam...
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Analysis of the Environmental Impact of the Hull Construction of a Small Vessel Based on LCA
PublikacjaIn recent years, issues related to the impact of human activity on the natural environment have become pressing, and the challenge of global warming necessitates immediate action. To support environmental protection efforts, it has become imperative to adopt a broader perspective when evaluating various products and systems. A valuable tool for such assessments is a life cycle assessment (LCA), which enables a comprehensive analysis...
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The low-frequency magnetic field emissions on-board of the vessel
Dane BadawczeThe data represents measurement results performed on board of the vessel. The acquired time-waveforms, corresponding to the instantaneous values of the magnetic field (MF) induction were acquired near the cable supplying the bow thruster motor. Data recording of the magnetic field density (MFD) emissions was carried out with a/d converters of the data...
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Effect of Washing on the Quality of Surimi-Like Preparation Obtained from Soft Tissue of Freshwater Mussel Sinanodonta woodiana (Lea, 1834)
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Urban Railway within the Linear Urban Structure: the Case Study of Perm, Russia
PublikacjaThe paper analyses the ten years’ experience of Perm to develop its system of the urban train trying to reveal the reasons for its modest performance and decline in the passenger traffic. The authors show how the Urban Train fits within the city urban structure and eval uate the potential of the Urban Train to become a feasible solution to the problem of connecting the periphery with the city centre. Furthermore,...
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Sailing Vessel Routing Considering Safety Zone and Penalty Time for Altering Course
PublikacjaIn this paper we introduce new model for simulation sea vessel routing. Besides a vessel types (polar diagram) and weather forecast, travel security and the number of maneuvers are considered. Based on these data both the minimal travelling costs and the minimal processing time are found for different vessels and different routes. To test our model the applications SailingAssistance wad improved. The obtained results shows that...
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Application of Pierson-Moskowitz wave spectrum to solution differential equations of multihull vessel
PublikacjaMotion of a dynamic system can be generated by different external or internal factors. At mathematical modelling external excitation factors of the most significant effect on the system, are selected. Such external factors are usually called excitations. Response of the system to given excitations is mathematically characterized by a definite transformation called operator of a system. For a broad class of dynamic systems the...
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INFLUENCE OF THE HULL SHAPE ON THE ENERGY DEMAND OF A SMALL INLAND VESSEL WITH HYBRID PROPULSION
PublikacjaRecently, there has been a significant development of ecological propulsion systems, which is in line with the general trend of environmentally friendly “green shipping”. The main aim is to build a safe, low-energy passenger ship with a highly efficient, emission-free propulsion system. This can be achieved in a variety of ways. The article presents the main problems encountered by designers and constructors already at the stage...
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SUSSET - Sustaining Small Expanding Towns = Reprezentacyjne przestrzenie publiczne Helu i Pucka
PublikacjaPublikacja dotyczy europejskiego program SUSSET - Sustaining Small Expanding Towns INTERREG IIIC dotyczącego wsparcia rozwoju małych miast europejskich o różnych lokalizacjach. Trzy miasta Pomorza Lębork, Puck i Hel ze środków SUSSET podjęły trud rewitalizacji swych głównych przestrzeni miejskich, których nowy wizerunek posłuzyć miał wzmocnieniu potencjału turystycznego i odnowie tożsamości lokalnej.
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INFORMATION ABOUT DYNAMICS OF THE SEA SURFACE AS A MEANS TO IMPROVE SAFETY OF THE UNMANNED VESSEL AT SEA
PublikacjaOne of the fundamental states of the sea surface is its heave. Despite of years of the intense scientific inquiry, no clear understanding of the influence of this aspect on the dynamics of the sea environment has emerged. The separation of two nearby fluid elements which one may observed for example as a free floating of small objects on the sea surface (rescuers on the rough sea or small research vessels) is caused by the interaction...
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Vessel Energy Requirement Prediction from Acceleration Stage Towing Tests on Scale Models
PublikacjaOne of the most crucial tasks for naval architects is computing the energy required to meet the ship’s operational needs. When predicting a ship’s energy requirements, a series of hull resistance tests on a scale model vessel is carried out in constant speed stages, while the acceleration stage measurements are ignored. Another important factor in seakeeping analysis is the ship’s hydrodynamic added mass. The second law of dynamics...
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Shaping the new planning curricula in the post-socialistic context lessons from Poland and Russia
PublikacjaPlanning education is the issue widely discussed during various conferences and seminars, especially ones grouping the representatives of universities offering professional education in this field. But to large extend this discourse is dominated by the realities and specifics of the highly- developed countries, which is also reflected in the structure of the organizations of universities offering these. At the same time planning...
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Deduplication of Position Data and Global Identification of Objects Tracked in Distributed Vessel Monitoring System
PublikacjaVessel monitoring systems (VMS) play a very important role in safety navigation. In most cases, their structure is distributed and they are based on two data sources, namely Automatic Identification System (AIS) and Automatic Radar Plotting Aids (ARPA). Such approach results in several objects identification and position data duplication problems, which need to be solved in order to ensure the correct performance of a given VMS....
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Deduplication of Tracked Objects Position Data at Single Observation Point of a Vessel Monitoring System
PublikacjaVessel Monitoring System (VMS) play a major role in safety navigation. In most cases they are based on two data sources, namely Automatic Identification System (AIS) and Automatic Radar Plotting Aids (ARPA). Integration of data obtained from these sources is an important problem, which needs to be solved in order to ensure the correct performance of a given VMS. In this paper basic functions which should be implemented in a tracked...
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A new design of the poded azimuth thruster for a diesel-hydraulic propulsion system of a small vessel
PublikacjaW artykule przedstawiono analizę różnych rodzajów okrętowych systemów napędowych z pędnikami azymutalnymi oraz rozwiązanie konstrukcyjne pędnika przeznaczonego dla małego statku z napędem diesel-hydraulicznym.Cechą charakterystyczna tego rozwiązania jest umieszczenie pod wodą głównego hydraulicznego silnika, napedzającego śrubę o skoku stałym mieszczoną w dyszy. Silnik zamocowany do gondoli połączonej sztywno z pionowową kolumną...
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Formulation of spectral truss element for guided waves damage detection in spatial steel trusses
PublikacjaW pracy przedstawiono sformułowanie wielowęzłowego elementu spektralnego oraz odpowiedniego schematu całkowania ukierunkowanego na problem propagacji fal w kratownicach przestrzennych o dowolnej geometrii. Zaproponowane podejście nie ogranicza liczby węzłów w elemencie kratowym. Porównawcze rozwiązania numeryczne przeprowadzono dla konstrukcji idealnej (w stanie nieuszkodzonym) oraz dlakonstrukcji z miejscową nieregularnością w...
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ADAPTIVE BACKSTEPPING TRACKING CONTROL FOR OVER-ACTUATED DP MARINE VESSEL WITH INERTIA UNCERTAINTIES
PublikacjaDesigning a tracking control system for an over-actuated dynamic positioning marine vessel in the case of insufficient information on environmental disturbances, hydrodynamic damping, Coriolis forces and vessel inertia characteristics is considered. The designed adaptive MIMO backstepping control law with control allocation is based on Lyapunov control theory for cascaded systems to guarantee stabilization of the marine vessel...
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A New Method for Determining the Territorial Sea Baseline Using an Unmanned, Hydrographic Surface Vessel
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REPORT Verification expertise of Detroit Diesel engines 16V149TI on the vessel ORP GEN. PUŁASKI
PublikacjaVerification expertise of propulsion engines for generating sets of the ORP GEN. PUŁASKI - type 16V149TI related to a complaint sent by the shipowner to Shiprepair Yard NAUTA S.A.
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Onboard Energy Storage and Power Management Systems forAll-Electric Cargo Vessel Concept
PublikacjaThis paper presents an innovative approach to the design of a forthcoming, fully electric-powered cargo vessel. This work begins by defining problems that need to be solved when designingvessels of this kind. Using available literature and market research, a solution for the design of apower management system and a battery management system for a cargo vessel of up to 1504 TEUcapacity was developed. The proposed solution contains...
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Vessel Scheduling Optimization Model Based on Variable Speed in a Seaport with One-Way Navigation Channel
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Rosja ideologiczna w „Zdobyciu władzy” Miłosza [Ideological Russia in The Seizure of Power by Czesław Miłosz]
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Factors determining accumulation of bisphenol A and alkylphenols at a low trophic level as exemplified by mussels Mytilus trossulus
PublikacjaThe aim of the study was to investigate abiotic and biotic factors influencing the accumulation of endocrine disrupting compounds (EDCs) such as bisphenol A (BPA), 4-tert-octylphenol (OP) and 4- nonylphenol (NP) in mussels Mytilus trossulus from the Gulf of Gdansk (Southern Baltic). The key abiotic factor influencing BPA, OP and NP accumulation in mussels is their hydrophilicity/lipophilicity, which affects their main assimilation...
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The Analysis of Container Vessel Service Efficiency in the Aspect of Berth and Handling Equipment Usage in Polish Ports
PublikacjaThe paper analyses the efficiency of container vessel service in Polish container terminals taking under considerations different berth layouts and handling equipment.
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The Proposal to “Snapshot” Raim Method for Gnss Vessel Receivers Working in Poor Space Segment Geometry
PublikacjaNowadays, we can observe an increase in research on the use of small unmanned autonomous vessel (SUAV) to patrol and guiding critical areas including harbours. The proposal to “snapshot” RAIM (Receiver Autonomous Integrity Monitoring) method for GNSS receivers mounted on SUAV operating in poor space segment geometry is presented in the paper. Existing “snapshot” RAIM methods and algorithms which are used in practical applications...