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Wyświetlanie 1-15 z 172
Tytuł:
Quantitative analysis of the impact of fishing ship traffic streams on traffic streams of merchant vessels in Polish maritime areas
Autorzy:
Anczykowska, A.
Rekowska, P.
Ślączka, W.
Powiązania:
https://bibliotekanauki.pl/articles/135281.pdf
Data publikacji:
2018
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
fishing vessels
Baltic Sea
traffic streams
merchant vessels
maritime areas
risk
Opis:
The Baltic Sea is crisscrossed by several dense vessel traffic routes. Growing shipping traffic increases the likelihood of collisions. A quantitative analysis of the impact of fishing vessel traffic streams on streams of merchant vessel traffic aims to identify areas of intense traffic of this type and to assess the potential risks. The identification of intersections of fishing vessel routes and merchant shipping traffic allows us to identify spots of potential collisions. The analysis made use of the IALA IWRAP Mk2 program and AIS data collected from April 1, 2013 to March 31, 2014.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2018, 53 (125); 93-101
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Różnorodność form w rzędach elementów trachealnych komórek roślinnych
Various forms among tracheary elements rows in plant cells
Autorzy:
Tulik, M.
Powiązania:
https://bibliotekanauki.pl/articles/1019287.pdf
Data publikacji:
2006
Wydawca:
Polskie Towarzystwo Leśne
Tematy:
naczynia rozgalezione
cewki
naczynia typu zigzag
botanika lesna
lesnictwo
naczynia roznorodne
naczynia kolowe
drewno
circular tracheids and vessels
zigzag vessels
branched vessels
heterogeneous vessels
wood
Opis:
This paper reviews non classical forms of tracheary elements. Various forms of the tracheary elements were presented as follows: circular tracheids and vessels, zigzag, branched and heterogeneous vessels. The shapes and localizations of the vessels types were showed on figures and micrographs. It seems that access to information recorded in shape and size of woody cells could help for a better undertstanding of physiological functions of vascular system in woody plant.
Źródło:
Sylwan; 2006, 150, 03; 31-38
0039-7660
Pojawia się w:
Sylwan
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluating an inland waterway cargo vessel’s energy efficiency indices
Autorzy:
Kalajdžić, Milan
Vasilev, Matija
Momčilović, Nikola
Powiązania:
https://bibliotekanauki.pl/articles/32898591.pdf
Data publikacji:
2022
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
inland vessels
energy efficiency
energy efficiency of inland vessels
EEXI
EEDI
Opis:
Although the International Maritime Organization (IMO) introduced the energy efficiency requirements for ships more than a decade ago, to date, inland navigation has not been affected by corresponding regulations at all. Therefore, inland waterway vessels are left with no mandatory requirements that could push their technology into more energy efficient design. Fortunately, there are certain pioneering attempts to define energy efficiency criteria for inland vessels. This paper tries to gather and provide a review of such methods. Moreover, a typical Danube cargo inland vessel’s data are used to evaluate their current energy efficiency levels with respect to provisional criteria. Consequently, two methods are found and used here. They are both based on IMO’s energy efficiency concept but modified for the inland waterway vessels. The methods delivered a significant difference in applicability and were difficult to compare. Moreover, shallow and deep-water effects are explored in the same regard but provided unsound conclusions. The final results displayed discrepancies in energy efficiency levels for the same vessels and so the methodology should be improved and harmonised, if it is to be introduced as mandatory for inland waterway vessels. The analysis provided a glimpse into the current condition of the traditional design of the Danube inland fleet, with respect to the emerging energy efficiency policies.
Źródło:
Polish Maritime Research; 2022, 2; 27-34
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Strategies and Measures to Improve the Work Environment of Service Crew on Board Swedish Passenger Vessels
Autorzy:
Praetorius, G. P.
Österman, C.
Hult, C.
Powiązania:
https://bibliotekanauki.pl/articles/117608.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
passenger vessels
service crew
Swedish vessels
Swedish maritime cluster
Swedish passenger vessels
weafarers
Swedish
Rapid Upper Limb Assessment (RULA)
seafarers' work
Opis:
This paper presents findings from three workshops focused on the physical, organizational and social work environment of service crew working on board Swedish passenger vessels. The first workshop aimed to identify underlying causes of long-term sick leave among employees in the service department, and potential measures that can be taken to reduce ill-health. The second and third workshop explored knowledge of available methods to identify occupational safety and health risks, and suggest health-promotion strategies at individual, team and company levels. A total of 58 persons from the Swedish maritime cluster participated in the workshops. During the workshops, open and structured brainstorming was used to create affinity diagrams to systematically summarize the identified causes, risks and strategies. Although the results presented in this article stem from a research project focused on Swedish passenger vessels, many of the findings may be transferable to an international maritime setting towards a deeper understanding of seafarers’ work environment and working conditions.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 587-595
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Causes of Ships Groundings in Terms of Integrated Navigation Model
Autorzy:
Jurdziński, M.
Powiązania:
https://bibliotekanauki.pl/articles/320709.pdf
Data publikacji:
2017
Wydawca:
Polskie Forum Nawigacyjne
Tematy:
ship grounding
losses of vessels
Opis:
The paper presents an influence of the navigational model change on the structural and qualitative changes of the ships groundings in international shipping. Data was analyzed based on reports of 75 seagoing vessels in international shipping in the 2000–2014. This study is an attempt to assess the causes of ships groundings in the new integrated navigation model.
W artykule przedstawiono wpływ zmiany modelu nawigacyjnego na zmiany strukturalne i jakościowe powstawania awarii wejścia statków na mielizny w żegludze międzynarodowej. Opracowano dane na podstawie raportów wejść na mieliznę 75 statków morskich w żegludze międzynarodowej w latach 2000–2014. Niniejsza praca stanowi próbę oceny przyczyn powstawania awarii wejścia statku na mieliznę w nowym modelu zintegrowanej nawigacji morskiej.
Źródło:
Annual of Navigation; 2017, 24; 119-135
1640-8632
Pojawia się w:
Annual of Navigation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The proposal to “snapshot” raim method for GNSS vessel receivers working in poor space segment geometry
Autorzy:
Nowak, A.
Powiązania:
https://bibliotekanauki.pl/articles/259111.pdf
Data publikacji:
2015
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
GNSS
RAIM
navigation
Autonomous Vessels
Opis:
Nowadays, 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 have been developed for airborne receivers, thus two main assumptions have been made. The first one is that the geometry of visible satellites is strong. It means that the exclusion of any satellite from the positioning solution don’t cause significant deterioration of Dilution of Precision (DOP) coefficients. The second one is that only one outlier could appear in pseudorange measurements. In case of SUAV operating in harbour these two assumptions cannot be accepted. Because of their small dimensions, GNSS antenna is only a few decimetres above sea level and regular ships, buildings and harbour facilities block and reflect satellite signals. Thus, different approach to “snapshot” RAIM is necessary. The proposal to method based on analyses of allowable maximal separation of positioning sub-solutions with using some information from EGNOS messages is described in the paper. Theoretical assumptions and results of numerical experiments are presented.
Źródło:
Polish Maritime Research; 2015, 4; 3-8
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sciatic vessels – a case report
Autorzy:
Gałuszka, Łukasz
Leksa, Natalia
Leksa, Dawid
Uryniak, Adam
Aebisher, David
Bartusik-Aebisher, Dorota
Powiązania:
https://bibliotekanauki.pl/articles/2040141.pdf
Data publikacji:
2020-12-30
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
artery
sciatic vessels
surgical treatment
Opis:
Introduction. Sciatic vessels most often accompany the sciatic nerve. Sciatic vessels are very rare. Aim. In this paper we determine the procedure in sciatic vessels surgical treatment. Description of the case. We present the case of a 75-year-old patient with symptoms of acute right lower limb ischemia. The patient was discharged home in good condition, and remains in outpatient control to this day. Conclusion. The popliteal artery proved to be available, but much deeper than usual.
Źródło:
European Journal of Clinical and Experimental Medicine; 2020, 4; 326-327
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An innovative time-saving method of turning for vessels conducting seismic surveys
Autorzy:
Walus, A.
Gucma, L.
Putynkowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/135513.pdf
Data publikacji:
2016
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
efficiency
geophysics
navigation
seismic
vessels
surveys
Opis:
The paper presents a turning method saving time and energy while conducting seismic surveys and an example of its application. The introduced turning method is based on use of the ocean currents / tidal streams as a supporting factor. The turning technique is applicable for vessels towing streamers and conducting line-change or other maneuvers similar to 180° turn. Chosen forces affecting seismic in-water equipment as well as behavior of the spread are briefly shown and explained. Some advantages over traditional turning techniques are here described. The method was applied onboard the seismic vessel Geo Pacific reducing significantly time required for line-change.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2016, 45 (117); 207-211
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gall-Bladder and Hepatoduodenal Ligament Lymphangioma – Case Report and Literature Review
Autorzy:
Nazarewski, Łukasz
Patkowski, Waldemar
Pacho, Ryszard
Marczewska, Maja
Krawczyk, Marek
Powiązania:
https://bibliotekanauki.pl/articles/1396019.pdf
Data publikacji:
2013-01-01
Wydawca:
Index Copernicus International
Tematy:
lymphangioma
gall-bladder
cholecystectomy
lymphatic vessels
Opis:
Lymphangiomas are rare benign lesions of the lymphatic vessels that are most commonly diagnosed in childhood. Intraperitoneal localization is unusual as, typically, they are located in the head and neck areas. In general, abdominal lymphangiomas seem to be asymptomatic, however, patients may occasionally suffer from acute abdominal symptoms, due to intestinal obstruction or peritonitis. The study presented a case of a 41-year-old female patient, clinically asymptomatic, who was accidentally diagnosed with a multiseptated cystic lesion of the right liver lobe surrounding the gall-bladder fossa in a routine ultrasound examination. Further examinations including computed tomography and magnetic resonance (MR) aroused suspicion of a polycystic lesion of the gall-bladder and hepatoduodenal ligament. The cystic lesion of the gall-bladder and hepatoduodenal ligament filled with lymphatic fluid was diagnosed intraoperatively. Simultaneous cholecystectomy and radical resection of the cystic lesion was undertaken. The histopathological examination revealed the presence of a lymphangioma. Additionally, the authors of the study reviewed literature data concerning gall-bladder lymphangiomas.
Źródło:
Polish Journal of Surgery; 2013, 85, 1; 39-43
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical diagnostic system for visualization subcutaneous blood vessels
Autorzy:
Opilski, Zbigniew
Pustelny, Tadeusz
Pach, M.
Hejczyk, T.
Powiązania:
https://bibliotekanauki.pl/articles/1818253.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:
detection of subcutaneous blood vessels
light transmission through human skin
stereoscopic vision of blood vessels
Opis:
The paper presents a research concerning the issue of visualization of blood vessels in the human body. In the initial phase of the investigations the focus was on understanding the optical properties of human body tissues. Optical transmittance of human skin was measured. Skin transmittance reaches the maximum at around 670–850 nm and 970–1100 nm. The optimal wavelength suitable for work in reflected and transmitted light was chosen. It was based on extracting blood vessels from the image for using them further in a developed system. A unique measuring system with an integrated illuminator and highly sensitive light detectors for medical imaging and stereoscopic observation was created. The high usable value of the developed system was largely gained by the original numerical program for development of measurement results. The elaborated system of blood vessels’ visualization is a mobile device. It was tested for imaging subcutaneous blood vessels. Three-dimensional observation of circulation and microcirculation in subcutaneous breast tissues is possible. Practical tests of the elaborated device for blood vessels’ medical stereoscopic observations were presented. Tests at a wavelength of 850 nm were performed. It is planned to conduct patient tests in the future at the Maria Skłodowska-Curie Institute - Oncology Center (MSCI), the Branch in Gliwice, Poland.
Źródło:
Opto-Electronics Review; 2020, 28, 2; 64--68
1230-3402
Pojawia się w:
Opto-Electronics Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of the fuel supply to the safe operation of Polish fishing vessels
Oddziaływanie zasilania paliwem na bezpieczeństwo eksploatacji polskich jednostek rybackich
Autorzy:
Rajewski, P.
Powiązania:
https://bibliotekanauki.pl/articles/359653.pdf
Data publikacji:
2012
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
statki rybackie
testy paliw okrętowych
awarie jednostek rybackich
fishing vessels
fuel assessment
failures in fishing vessels
Opis:
A significant number of failures and accidents of Polish fishing vessels operating in the Baltic Sea was the impetus to examine their sources. It was found that one of the important factors causing the failure is poor condition of the fuel systems and inappropriate fishing vessels to be operated. Typical fuel installations operated on Polish fishing vessels were discussed. The methodology of sampling and testing of samples of fuel from fishing vessels to assess its fuel quality has been presented, as well as tests results.
Znacząca liczba awarii i wypadków polskich jednostek rybackich eksploatowanych na Bałtyku była impulsem do zbadania ich źródeł. Stwierdzono, iż jednym z istotnych czynników powodujących awarie jest zły stan techniczny układów paliwowych jednostek rybackich i niewłaściwa ich eksploatacja. W artykule omówiono typowe instalacje paliwowe polskich jednostek rybackich, przebadano pobrane z jednostek rybackich próbki paliwa celem oceny jego jakości i omówiono uzyskane wyniki.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 30 (102); 115-120
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A CNN Approach to Central Retinal Vein Occlusion Detection
Autorzy:
Bala, Jayanthi Rajee
Sindha, Mohamed Mansoor Roomi
Sahayam, Jency
Govindharaj, Praveena
Rakesh, Karthika Priya
Powiązania:
https://bibliotekanauki.pl/articles/27311911.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Blood vessels
segmentation
Features
CRVO
deep learning
Opis:
In the field of medicine there is a need for the automatic detection of retinal disorders. Blindness in older persons is primarily caused by Central Retinal Vein Occlusion (CRVO). It results in rapid, irreversible eyesight loss, therefore, it is essential to identify and address CRVO as soon as feasible. Hemorrhages, which can differ in size, pigment, and shape from dot-shaped to flame hemorrhages, are one of the earliest symptoms of CRVO. The early signs of CRVO are, hemorrhages, however, so mild that ophthalmologists must dynamically observe such indicators in the retina image known as the fundus image, which is a challenging and time-consuming task. It is also difficult to segment hemorrhages since the blood vessels and hemorrhages (HE) have the same color properties also there is no particular shape for hemorrhages and it scatters all over the fundus image. A challenging study is needed to extract the characteristics of vein deformability and dilatation. Furthermore, the quality of the captured image affects the efficacy of feature Identification analysis. In this paper, a deep learning approach for CRVO extraction is proposed.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 3; 565--570
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Grooved metal vessels from the Roman Period. Comments on the variability and contemporary state of research
Kovové nádoby zdobené žlábky z doby římské Poznámky k variabilitě a současnému stavu bádání
Autorzy:
Jílek, Jan
Powiązania:
https://bibliotekanauki.pl/articles/682030.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Roman metal vessels
grooved toreutics
Roman Period
Opis:
-
Źródło:
Acta Universitatis Lodziensis. Folia Archaeologica; 2016, 31
0208-6034
2449-8300
Pojawia się w:
Acta Universitatis Lodziensis. Folia Archaeologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary Designing Method of External Pressure Vessels for Sea Subsurface Applications
Autorzy:
Michalski, J. P.
Powiązania:
https://bibliotekanauki.pl/articles/259248.pdf
Data publikacji:
2010
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
subsurface buoy mooring systems
external pressure vessels
Opis:
This paper describes a unique engineering method intended for the preliminary designing of marine echo-location systems. The solved designing problem consists in determining geometrical parameters and selecting structural materials for a vessel of a buoyancy necessary to contain measuring instruments of a given mass, as well as its maximum gabarites and operational submersion depth. The assumed variability range of the system’s parameters determines a space of permissible applicability parameters of the method. Stress level related to permissible and critical stresses was assumed to be safety criterion for the vessel. The method may be applied also to solving converse problems consisting in determining maximum permissible submersion depth for a vessel made of assumed structural materials and having given geometrical parameters. The presented description of the method is illustrated by an example of its application.
Źródło:
Polish Maritime Research; 2010, 2; 3-9
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multi-objective weather routing of sailboats considering wave resistance
Autorzy:
Życzkowski, M.
Krata, P.
Szłapczyński, R.
Powiązania:
https://bibliotekanauki.pl/articles/260441.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
sailing vessels
weather routing
waves
navigation
resistance
Opis:
The article presents a method to determine the route of a sailing vessel with the aid of deterministic algorithms. The method assumes that the area in which the route is to be determined is limited and the basic input data comprise the wind vector and the speed characteristic of the vessel. Compared to previous works of the authors, the present article additionally takes into account the effect of sea waves with the resultant resistance increase on the vessel speed. This approach brings the proposed model closer to real behaviour of a sailing vessel. The result returned by the method is the sailing route, optimised based on the multi-criteria objective function. Along with the time criterion, this function also takes into account comfort of voyage and the number of performed turns. The developed method has been implemented as simulation application SaillingAssistance and experimentally verified.
Źródło:
Polish Maritime Research; 2018, 1; 4-12
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 172

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