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Tytuł:
The influence of the cuboid float’s parameters on the stability of a floating building
Autorzy:
Karczewski, Artur
Piątek, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/1585042.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
floating buildings
floating houses
houseboats
stability
floating body
Opis:
Usually, the concept of sufficient stability of a floating structure is connected with the capacity to keep a small heel angle despite the moment of heeling. The variable responsible for these characteristics is the initial metacentric height, which is the relation between the hydrostatic features of the pontoon and the mass properties of the entire object. This article answers the questions of how heavy the floating system should be, what the minimum acceptable draft is, and whether it is beneficial to use internal fixed ballast. To cover various technologies, a theoretical model of a cuboid float with average density representing different construction materials was analysed. The results indicate that the common practice of using heavy and deep floating systems is not always reasonable. In the case of floating buildings, which, unlike ships, can be exploited only under small heel angles, the shape and width of the submerged part of the object may influence the stability more than the weight or draft.
Źródło:
Polish Maritime Research; 2020, 3; 16-21
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Woda do zamieszkania
Living on the water
Autorzy:
Kupiec-Hyła, D.
Powiązania:
https://bibliotekanauki.pl/articles/345517.pdf
Data publikacji:
2007
Wydawca:
Politechnika Krakowska im. Tadeusza Kościuszki. Wydział Architektury. Katedra Kształtowania Środowiska Mieszkaniowego
Tematy:
pływające domy
pływająca architektura
"Water Villa"
Middelburg
floating house
floating architecture
Źródło:
Środowisko Mieszkaniowe; 2007, 5; 129-131
1731-2442
2543-8700
Pojawia się w:
Środowisko Mieszkaniowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability of free-floating ship. Part I
Autorzy:
Pawłowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/259241.pdf
Data publikacji:
2005
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
stability
free floating ship
Opis:
Problem of calculation of righting arms of the free-floating ship, i.e. longitudinally balanced at any heel angle, was formulated. In such a case of particular interest for a ship in the damage condition, the righting arms are ambiguous as they depend on a way the heeling moment acts. Two cases were considered: when the heeling moment is parallel to the ship plane of symmetry, and the case when it performs the least work, i.e. when the moment is parallel to the main axis of ship waterplane. It was demonstrated that angular translations (heel and trim) are then the Euler angles associated with a relevant reference axis. Some cases of the incorrect defining and using of those angles in today design practice were indicated. The most important features of the curve of righting arms of free-floating ship were demonstrated.
Źródło:
Polish Maritime Research; 2005, 2; 3-9
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability of free-floating ship. Part II
Autorzy:
Pawłowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/259551.pdf
Data publikacji:
2005
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
stability
free floating ship
Opis:
This is the second part of the paper published in Polish Maritime Research no. 2/2005, dealing with the calculation problem of righting arms of the free-floating ship, i.e. longitudinally balanced at any heel angle. In such case the righting arms are ambiguous as they depend on a way the heeling moment acts. Two cases were considered: when the heeling moment is parallel to the ship plane of symmetry, and the case when it performs the least work, i.e. when the moment is parallel to the main axis of ship waterline. It was demonstrated that angular translations (heel and trim) are then the Euler angles associated with a relevant reference axis. Some cases of the incorrect defining and using of those angles in today design practice were indicated. The most important features of the curve of righting arms of free-floating ship were demonstrated.
Źródło:
Polish Maritime Research; 2005, 3; 3-8
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Floating buildings in the hotel, catering and water tourism industry in Poland – Business environment survey
Autorzy:
Piątek, Łukasz
Wycisk, Aleksandra A.
Parzych, Dariusz
Modrzejewska, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/293197.pdf
Data publikacji:
2020
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
catering industry
commercial buildings
floating buildings
floating architecture
hotel industry
water tourism industry
Opis:
The paper presents results from social research on the Polish business representatives potentially interested in using the floating buildings. The main purposes of the study were to assess the level of knowledge about floating buildings and diagnose stimulants and inhibitors of their development in the hotel, catering, and water tourism industry. Combining the quantitative and the qualitative methodology, research was conducted using an on-line survey (CAWI) and Focused Group Interviews (FGI). Both involved a non-probabilistic, purposive sampling to reach a specific subgroup of the industry: owners or employees of catering, hotel or water tourism companies having or considering having a floating building. The group included both new and long-standing companies using facilities on water or with direct and indirect access to the water. The study identified stimulating and inhibitory factors broken down into internal (context-independent) and external (context-dependent) conditions. Results show that in Poland floating commercial buildings are a niche topic but also a developable one. Although 71% of the respondents notice difficulties resulting from the insufficient infrastructure and 66.5% of them indicate the lack of legal regulations, they also see the potential of floating buildings: depending on the industry, from 90 to 95% respondents find them “definitely attractive” or “rather attractive”. The most common reason for rejecting floating development is the lack of attractive moorages in the area (43.5% answers).
Źródło:
Journal of Water and Land Development; 2020, 45; 100-106
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Specyfika uczenia się na obczyźnie trzech fal polskiej emigracji
SPECIFITY OF LEARNING IN A FOREIGN COUNTRY OF THREE WAVES OF POLISH EMIGRANTS
Autorzy:
Słowik, Aneta
Powiązania:
https://bibliotekanauki.pl/articles/417542.pdf
Data publikacji:
2011
Wydawca:
Akademickie Towarzystwo Andragogiczne
Tematy:
CATEGORY OF ‘FLOATING’
THREE WAVES OF POLISH EMIGRANTS
PROCESS OF LEARNING IN ‘FLOATING’ SITUATION
Opis:
Article presents a learning process Poles living in emigration in England. Analyzing the fates of the post-WWII emigrants studied, it is possible to differentiate three waves of emigration to England. The first wave is composed of emigrants of a political nature (after 1945). They arrived to England along with the army of General Władysław Anders. The second wave is emigrants from the 1960s, 70s, 80s and 90s. Their exits were related to the political and economic situation in Poland, as well as with ongoing political events. The third wave has been named 2004+. Among this group we may differentiate those who decided to leave following Poland’s accession to the European Union and the simultaneous opening of the labour markets of Great Britain and Ireland. By writing this paper, a goal was to show the perceptions of learning by the narrators themselves in the framework of a division of emigrants into three waves, as well as to distinguish shared areas of learning in each wave of emigration and to show the biographical knowledge of the interlocutors. With the results of the investigations as a point of reference I have used the category of ‘floating’ (authored by A. Bron) which shows the specificity of adults’ learning in emigration. In the analysis of the biographical stories of the emigrants I present the manner in which the learning of narrators of the first, second and third waves undergoes modification in a "floating" situation, leading to their adopting various attitudes from disorganized to controlling, to the making of (irrational or rational) choices and decisions and to the changes in their identities.
Źródło:
Rocznik Andragogiczny; 2011, R. 2011; 200-216
1429-186X
2391-7571
Pojawia się w:
Rocznik Andragogiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Revising Hong Kong’s midstream operation: A discussion on the Port Feeder Barge concept
Autorzy:
Lau, Yui-yip
Malchow, Ulrich
Powiązania:
https://bibliotekanauki.pl/articles/2141017.pdf
Data publikacji:
2019
Wydawca:
Fundacja Centrum Badań Socjologicznych
Tematy:
midstream operation
floating crane
floating terminal
intermodal harbour vessel
intra-port haulage
container barge
LNG
Opis:
Midstream operation (MSO) has played an important role in Hong Kong's port business since the 1960s. MSO has been seriously neglected in maritime transport research in the past. In the course of filling this significant research gap, we aim to address how a new type of harbor vessel – Port Feeder Barge (PFB) can strengthen the sustainability and attractiveness of MSO in Hong Kong and of the port in general. By introducing such type of vessel MSO becomes much safer and faster, much more efficient with less manpower being needed, provides higher flexibility and causes less environmental impact compared to the traditional Hong Kong midstream barges (HK barges). Due to its special layout as a deck carrier the PFB is also very well suited to be optionally fuelled with Liquefied Natural Gas (LNG) which would result into an ultimate "green" harbor vessel. Semi-structured, in-depth interviews with a number of maritime professionals involved in MSO activities in Hong Kong have revealed how PFBs could be employed in MSO, the potential regulatory issues and operating challenges and the critical success factors for further PFB deployment in the Asia-Pacific region. The study provides insights how the PFB could provide notable advantages for a sustainable recovery of MSO in Hong Kong.
Źródło:
Journal of Sustainable Development of Transport and Logistics; 2019, 4, 2; 5-21
2520-2979
Pojawia się w:
Journal of Sustainable Development of Transport and Logistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Porównanie metod testowania wytrzymałości kleju na odrywanie dla różnych sposobów przygotowania powierzchni próbek
Comparison of methods for testing the peel strength for different methods of preparation of surface samples
Autorzy:
Kaczorowska, E.
Powiązania:
https://bibliotekanauki.pl/articles/952914.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
Climbing Drum
Floating Roller
połączenie klejone
Opis:
Celem artykułu było zestawienie wyników badań wytrzymałości kleju na odrywanie z dwóch metod: wspinającego bębna (Climbing Drum) według normy ASTM D1781 oraz swobodnych wałków (Floating Roller) - ASTM D3167 oraz sprawdzenie wpływu przygotowania powierzchni klejonych na połączenie. Przedstawiono także przegląd literatury w kierunku określania właściwości kleju oraz porównania wymienionych metod. Badania zostały przeprowadzone na takich samych układach badawczych, tj. wykonanych próbkach kompozytowych z prepregów węglowych i szklanych w technologii bezautoklawowej. Do laminaiów zostały przyklejone blaszki ze stali nierdzewnej na klej błonkowy. Sprawdzono wpływ przygotowania powierzchni stali do klejenia na wytrzymałości otrzymane z badań przeprowadzonych obydwiema metodami. Blaszki stalowe tylko przeszlifowano i oczyszczono dla serii badań zużyciem Climbing Drum i Floating Roller, oraz dla kolejnej serii badań blaszki dodatkowo aktywowano chemicznie. Po przeanalizowaniu obydwu metod i otrzymanych wyników określono, że wartości wytrzymałości metod tych nie można zestawić jako równoważne testy.
The aim of this article was to compare two test methods of peel strength for the adhesive bond: Climbing Drum according to ASTM D1781 and the Floating Roller-ASTM D3167. The literature was reviewed to determine the adhesive properties and to compare the previously mentioned methods. Test were conducted on the same samples. Composite samples were made from carbon and glass prepregs in out of autoclave technology. Laminates were bonded with stainless steel tinware using structural adhesive film. The impact of steel surface preparation was checked for bonding strength values obtained from both tests methods. Before tests on Climbing Drum and Floating Roller the sets of tinware were prepared: first set were only grinding and cleaning, but second set were also chemical activate. After analyzing both methods and results it was set out that they can not to be compared.
Źródło:
Prace Instytutu Lotnictwa; 2016, 3 (244); 90-96
0509-6669
2300-5408
Pojawia się w:
Prace Instytutu Lotnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fuzzy Processing Implementation in Dedicated Digital Hardware
Autorzy:
Szecówka, P. M.
Musiał, A.
Powiązania:
https://bibliotekanauki.pl/articles/226691.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fuzzy
hardware
floating point
VHDL
FPGA
Opis:
The paper presents a concept of digital circuit dedicated for fuzzy processing with numerical inputs and outputs. Partially concurrent and pipelined data flow provides high performance, with relatively low dependence on particular algorithm complexity. Sample design with triangular fuzzy sets, rule strength calculation (minimum approach) and defuzzyfication by weighted sum of fuzzy sets centers was implemented in VHDL, verified and synthesized for FPGA. Floating point arithmetic was applied, including dvision performed by dedicated synchronous machine. All modules were prepared for easy reuse/redesign.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 4; 405-410
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Floating Collections – an Alternative Concept in Library Collection Management
Autorzy:
Obydzińska, Beata Anna
Powiązania:
https://bibliotekanauki.pl/articles/962109.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
floating collections, collection management, public libraries
Opis:
The article is about an alternative concept in library collection management – floating collections – very popular in American public libraries nowadays. Selected literature is presented, the history of approach and a case study from Monterey County Free Libraries (MCFL) where the author of this article works. Potential benefits and challenges of floating collections are presented as well.
Źródło:
Folia Bibliologica; 2016, 58
2449-8246
1230-2376
Pojawia się w:
Folia Bibliologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Koncepcja konstrukcji nośnej lekkiego kompozytowego mostu pływającego do transportu kołowego
Concept of construction of lightweight composite floating bridge for road transport
Autorzy:
Błażejewski, W.
Gąsior, P.
Kaleta, J.
Krzyżak, A.
Rybczyński, R.
Powiązania:
https://bibliotekanauki.pl/articles/312531.pdf
Data publikacji:
2010
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
most pływający
kompozyty
floating bridge
composite
Opis:
W pracy zaproponowano koncepcję budowy oraz technologię wykonania lekkiego kompozytowego pontonu przeznaczonego do budowy mostów pływających z przeznaczeniem do transportu kołowego. Propozycja wykorzystuje ideę powiększonego tzw. plastra miodu, w którym pojedyncza komórka jest graniastosłupem o przekroju sześciokąta foremnego o wymiarze 100 mm. W pierwszym etapie wykonano i przebadano pojedyncze komórki, których rdzeniem był polistyren spieniony zamknięty w kompozycie epoksydowo - szklanym. Drugi etap prac technologicznych i badawczych polegał na wykonaniu bloku złożonego z 25 wspomnianych komórek o kształcie graniastosłupa o przekroju sześciokąta foremnego o wymiarze 600 mm. Wyniki przeprowadzonych wstępnych prac technologicznych i badawczych pozwalają stwierdzić, iż przyjęty kierunek jest dobry. Uzyskana gęstość pontonu wynosi 118 kg/m³. Blok pontonowy wykazuje zadowalające właściwości wytrzymałościowe.
The paper proposes the concept of construction and technology of manufacturing of lightweight composite pontoon intended to build a sail bridges for road transport. The proposal uses the idea of enlarged honeycomb, in which a single cell is a hexagonal prism dimension 0.01 m and height of 0.5 m. In the first stage of work performed and tested a single cell, in which core made from polystyrene foam was enclosed in a composite epoxy - glass. The second stage of technological and research works was manufacturing of block consisting a complex of 25 shaped prism with hexagonal cross section and dimension 600 mm. The results of preliminary technological works and researches allow to conclude that the adopted course of the work is correct. Pontoon block exhibits satisfactory strength properties.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2010, 11, 6
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A general concept of design procedure for floating docks regarding their reliability, safety and ecological aspects
Autorzy:
Girtler, J.
Powiązania:
https://bibliotekanauki.pl/articles/260292.pdf
Data publikacji:
2005
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
safety
floating dock
reliability
design procedure
Opis:
In this paper is presented a concept of design procedure, and problems resulting from it, for floating docks with a view of taking into account their reliability and operational safety. It has been stressed that such design procedure is necessary for ensuring the docks appropriate pro-ecological features. It has been also shown that the design procedure should have several stages. The following kinds of design stages have been proposed to be accounted for : offer (canvassing) design, contract (ordered) design, concept (study) design, preliminary design, technical (classification) design and working design as well as the stage of elaboration of technical operational (delivery-acceptance) documentation. Knowledge areas necessary for such design procedure have been indicated. Attention has been also drawn to the necessity of accounting for, in designing the floating docks, diagnostic systems suitable to aid operational decision making .
Źródło:
Polish Maritime Research; 2005, S 1; 30-33
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Emigracja a proces uczenia się małżonków
Emigration and the learning process of spouses
Autorzy:
Kupis, Karolina
Kalus, Alicja Maria
Mazurek, Emilia
Powiązania:
https://bibliotekanauki.pl/articles/19322778.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Opolski. Redakcja Wydawnictw Wydziału Teologicznego
Tematy:
diada małżeńska
emigracja
floating
strategie radzenia sobie
uczenie się
marriage dyad
emigration
“floating”
coping strategies
learning
Opis:
Wstąpienie Polski do struktur Unii Europejskiej zapoczątkowało emigrację poakcesyjną Polaków, dla której charakterystyczne było pojawienie się nowych kierunków wyjazdów emigracyjnych. Jednym z najbardziej popularnych stała się Wielka Brytania. Wyjazd emigracyjny jest wydarzeniem znaczącym w biografii człowieka i całej jego rodziny. W świetle koncepcji Agnieszki Bron (2000, 2006), wiąże się on z licznymi napięciami, ambiwalencją, poczuciem bezradności i zawieszenia (tzw. floating), a jednocześnie jest wydarzeniem o potencjale edukacyjnym. Celem badań uczyniono wyjaśnienie procesu uczenia się małżonków doświadczających emigracji. Przeprowadzono badania biograficzne z wykorzystaniem autobiograficznego wywiadu narracyjnego i analizy dokumentów osobistych. W badaniach wzięło udział 10 diad małżeńskich przebywających na emigracji długookresowej w Wielkiej Brytanii. W wyniku analizy materiału empirycznego wyróżniono następujące kategorie doświadczeń wpisujące się we floating: zaskoczenie zastaną rzeczywistością, poczucie zagubienia i osamotnienia, niepewność co do słuszności podjętej decyzji, utrata poczucia bezpieczeństwa, podejmowanie prób radzenia sobie z kryzysem, wybór strategii radzenia sobie i uczenia się. Jednak nie w każdej narracji autobiograficznej występują wszystkie z wyróżnionych kategorii. W porównaniu z koncepcją A. Bron struktura floating w badanych biografiach składa się z większej liczby elementów, a jednocześnie traci swą etapowość, staje się rozmyta, ma charakter mozaikowy. Zidentyfikowano także dziesięć strategii radzenia sobie z poczuciem zawieszenia, nisko bądź wysoko zorientowanych na jedną z kultur: kraju przyjmującego lub kraju macierzystego. Strategie te w większości sprzyjały poznawaniu nowej kultury. Natomiast samo uczenie się od początku pobytu na emigracji było postrzegane jako wartość sprzyjająca adaptacji do życia w nowych uwarunkowaniach społeczno-kulturowych.
Poland’s accession to the structures of the European Union initiated the post-accession emigration of Poles, which was characterized by the emergence of new directions for emigration. Great Britain has become one of the most popular. An emigration is a significant event in the biography of a person and the whole family. In the light of Agnieszka Bron’s concept (2000, 2006), it is associated with numerous tensions, ambivalence, a sense of helplessness and suspension (the so-called “floating”), and at the same time, it is an educational event. The research aimed to explain the learning process of spouses experiencing emigration. Biographical research was carried out using an autobiographical narrative interview and an analysis of personal documents. Ten marriage dyads staying in a long-term emigration in Great Britain participated in the research. As a result of the study of the empirical material, the following categories of experiences that fit into “floating” were distinguished: surprise/fascination with the reality, sense of loss and loneliness, uncertainty as to the rightness of the decision made, loss of sense of security, attempting to cope with the crisis, choosing a coping strategy and learning. However, not all of the distinguished categories appear in every autobiographical narration. Compared to A. Bron’s concept, the “floating” structure in the biographies studied consists of a more significant number of elements. At the same time, it loses its stages, becomes blurry, and has a mosaic character. Ten strategies for coping with a sense of suspension were also identified, which were high or low orientated toward either: the culture of the host country or the culture of the home country. Most, but not all, of these strategies enhanced recognizing the new culture. Learning from the beginning is perceived as a value and an opportunity to better cope with the crisis experienced in living in new socio-cultural conditions.
Źródło:
Family Forum; 2022, 12; 159-184
2084-1698
Pojawia się w:
Family Forum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Making use of floating marks for position determination
Autorzy:
Naus, K.
Narloch, A.
Powiązania:
https://bibliotekanauki.pl/articles/360622.pdf
Data publikacji:
2012
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
free adjustment method
floating marks
position accuracy
Opis:
Evaluation of accuracy of position coordinates’ determination in respect to floating marks, with free adjustment method applied, has been a target of the paper. General theory of geodesic adjustment – classical one based on least squares method and free adjustment – is presented in its first part. Main part contains description of the research. It was conducted based on geometric navigational structure which elements had been formed by beacons placed in the Bay of Gdańsk. It consisted in simulating results of measurements made in respect to marks of this structure (bearings and distances) and calculating the position coordinates based on them, as well as its accuracy. The calculations were made with the method of classical geodesic adjustment and free adjustment applied. Discussion about obtained results of the research and general conclusions are given in the ending part of the article.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2012, 32 (104) z. 2; 137-140
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A design concept of fire protection system for an ecological floating dock
Autorzy:
Dymarski, C.
Śledź, D.
Powiązania:
https://bibliotekanauki.pl/articles/260325.pdf
Data publikacji:
2005
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
floating dock
electric installations
fire protection systems
Opis:
This paper presents possible fire risks to an ecological floating dock and a design concept of its fire prevention system. The design concept covers: the water main fire system, froth- smothering system for fire prevention of the main deck area and CO2 – fire extinguishing system for fire prevention of engine room, workshop and cable duct of the dock.
Źródło:
Polish Maritime Research; 2005, S 1; 70-76
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Biological, Chemical, and Physical Parameters to Evaluate the Effect of Floating Solar PV in Mahoni Lake, Depok, Indonesia: Mesocosm Experiment Study
Autorzy:
Andini, Syarfina
Suwartha, Nyoman
Setiawan, Eko Adhi
Ma'arif, Samsul
Powiązania:
https://bibliotekanauki.pl/articles/2086384.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
floating solar PV
mesocosm
natural water
ecosystem
Opis:
Waters provide essential needs both for human societies as well as natural ecosystems. Floating solar PV (FPV) applications on water bodies are currently in strong demand worldwide. Floating solar PV system is a new concept in renewable energy with the solar plants by harnessing available water surface, such in dams, lakes, and other water bodies. Although the floating solar PV industry is becoming more and more popular, the study on the biological, chemical, and physical properties effects of using FPV cover on natural water coverage – especially in tropical countries – has not been widely carried out yet. This paper aimed to evaluate the effect of floating solar PV on temperature, DO (dissolved oxygen), TDS (total dissolved solids), total phosphorus concentration, and chlorophyll-a concentration using mesocosm experiments to understand the biological, chemical, and physical process under closed environment. The experiment was conducted in a natural water body, Mahoni Lake, in which a total amount of 7 water samples were collected from each mesocosms. The results show that the floating solar PV reduces the average temperature, DO, conductivity, TDS, and chlorophyll-a concentration changes (p-value < 0.05); and the floating solar PV does not directly reduce the average total phosphorus concentration due to high probability of thermal stratification (p-value > 0.05).
Źródło:
Journal of Ecological Engineering; 2022, 23, 4; 201--207
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Loads Exerted on a Cylindrical Structure by Floating Ice Modelled as a Viscous-Plastic Material
Autorzy:
Staroszczyk, R.
Powiązania:
https://bibliotekanauki.pl/articles/241476.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
floating ice
cylindrical structure
rheology
viscosity
plasticity
Opis:
In this paper the problem of interaction between a coherent floating ice field and a fixed, rigid, vertically-walled circular cylinder is investigated. The ice cover, of horizontal dimensions significantly larger than the characteristic size of the structure, is assumed to be driven against the cylinder by wind drag forces. The ice is treated as a viscous-plastic material, in which the permissible stress states in the horizontal plane are bound by an elliptic yield curve. By using an associated flow rule, a constitutive law, involving two parameters defining the ice strength in compression and much smaller strength in extension, is derived in order to describe the behaviour of the material. The law predicts distinct responses during yield (occurring at high strain-rates) and during the flow when the yield condition does not apply (at lower strain-rates). The results of numerical calculations performed by a finite difference method illustrate, for chosen ice rheological parameters, the distribution of contact stresses at the ice - structure interface. Two forms of boundary conditions at the cylinder wall, free-slip and no-slip, are considered, and their effects on the horizontal loads sustained by the structure are examined. In addition, the results for the viscous-plastic rheology of ice are compared with those obtained on the assumption of a purely viscous behaviour of ice.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2006, 53, 2; 105-126
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A model of partially-depleted SOI MOSFETs in the subthreshold range
Autorzy:
Tomaszewski, D.
Łukasiak, L.
Jakubowski, A.
Domański, K.
Powiązania:
https://bibliotekanauki.pl/articles/308425.pdf
Data publikacji:
2001
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
SOI MOSFET
subthreshold range
floating body
transconductance
Opis:
A steady-state model of partially-depleted (PD) SOI MOSFETs I-V characteristics in subthreshold range is presented. Phenomena, which must be accounted for in current continuity equation, which is a key equation of the PD SOI MOSFETs model are summarized. A model of diffusion-based conduction in a weakly-inverted channel is described. This model takes into account channel length modulation, drift of carriers in the "pinch-off" region and avalanche multiplication triggered by these carriers. Characteristics of the presented model are shown and briefly discussed.
Źródło:
Journal of Telecommunications and Information Technology; 2001, 1; 61-64
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Apply FMEA modeling to a floating ecological desalination unit
Autorzy:
Dagkinis, I.
Lilas, T.
Nikitakos, N.
Powiązania:
https://bibliotekanauki.pl/articles/2069530.pdf
Data publikacji:
2011
Wydawca:
Uniwersytet Morski w Gdyni. Polskie Towarzystwo Bezpieczeństwa i Niezawodności
Tematy:
FMEA
reliability block diagram
floating autonomous desalination
Opis:
Water scarcity in small Aegean islands is considered a major problem for their development. On the other hand high potential renewable energy sources are available. Therefore a floating desalination unit was developed in order to treat the problem in an ecological manner. The floating unit has been operating for four years at sea close to a small island. Marine environment and autonomous remote operation led to a more complex design with several sensors and safety mechanisms. This paper illustrates and applies Failure Modes and Effects Analysis (FMEA) modeling to Floating Ecological Desalination Unit. FMEA is based on monitoring data and also taking into account failure dependencies between components during the assessment of desalination system reliability. Then two systems, one with safety mechanisms and one without are analyzed by Reliability Block Diagrams (RBD) and the reliability of each system is computed. The comparison between a simple system and the remote autonomous system illustrates the implications of the additional monitoring mechanisms and the impact of these mechanisms to reliability and risk assessment on the floating wind powered offshore desalination unit.
Źródło:
Journal of Polish Safety and Reliability Association; 2011, 2, 1; 73--82
2084-5316
Pojawia się w:
Journal of Polish Safety and Reliability Association
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Implementation of an Integrated Floating Wetland and Biofilter for Water Treatment in Nile Tilapia Aquaculture
Autorzy:
Somprasert, Somanas
Mungkung, Sattaya
Kreetachat, Nathiya
Imman, Saksit
Homklin, Supreeda
Powiązania:
https://bibliotekanauki.pl/articles/1955489.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
aquaculture
biofilter
fish pond water
floating wetland
Opis:
Due to the high nutrient and organic matter contents of fish pond water, the water must be treated before disposal to prevent the eutrophication and deterioration of natural receiving waters. Floating wetlands (FTWs) and biofilters are environmentally friendly ecological treatments that can be used for this water. Thus, this study aimed to investigate the performance of FTWs with biofilters (FTW/Bs) for nutrient and organic compound removal. Two FTW/ Bs were applied in a pond with 5,000 Nile tilapia. The macrophyte species in the FTWs were Cyperus (Cyperus spp.) and Heliconia (Heliconia spp.). The buoyant mats of the FTWs were made from bamboo, and 200 bioballs were loaded below the mats. The water quality parameters in the pond were monitored for 5 weeks between the control test without the FTW/Bs and the experimental test with FTW/Bs at sites 1 (S1) to 8 (S8). The FTW/Bs were located at sites 2 (S2) and 3 (S3). The results showed reductions in all water quality parameters except orthophosphate (ortho-P) at S2 and S3. The COD, BOD, NH4-N, and SS at S2 and S3 parameters during the experimental test were significantly lower than those during the control test, in the ranges of 20.34–33.96, 25.47–29.41, 25.86–27.87, and 26.00–28.44%, respectively.
Źródło:
Journal of Ecological Engineering; 2021, 22, 8; 146-152
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trajektoria uczenia się emigrantów w sytuacji doświadczania „zawieszenia” (floating). Ku rozumieniu poradnictwa międzykulturowego
The Learning Trajectory of Emigrants during the Experience of ‘Floating’. Towards the Meaning of Intercultural Counselling
Autorzy:
Słowik, Aneta
Powiązania:
https://bibliotekanauki.pl/articles/686409.pdf
Data publikacji:
2012
Wydawca:
Wydawnictwo Naukowe Dolnośląskiej Szkoły Wyższej
Tematy:
trajektoria uczenia się
polscy emigranci
kategoria zawieszenia „floating”
poradnictwo międzykulturowe
trajectory of learning
Polish emigrants
‘floating’
intercultural counselling
Opis:
The author of the article discusses stages of the learning trajectory of emigrants who go through a period of floating. The experience of emigration, called a trajectory of floating (biography of floating), is not identical with the trajectory of suffering (F. Schütze). Introduced by A. Bron, the category of floating redefines this experience as emancipation and an educational process of learning. Studying the ways and methods of emigrants’ learning may help organise intercultural counselling for the already settled foreigners, newcomers from other cultures as well asthose planning to emigrate. 
Autorka artykułu dokonuje charakterystyki etapów trajektorii uczenia się emigrantów w sytuacji przeżywania przez nich zawieszenia (floating). Doświadczenie emigracji nazwane trajektorią zawieszenia (biografią zawieszenia) nie ma wyłącznie wymiaru trajektorii cierpienia (F. Schütze). Kategoria floatingu – autorstwa A. Bron – zostaje wykorzystana do przedstawienia tej sytuacji jako emancypacyjnego i edukacyjnego procesu uczenia się. Poznanie dróg i sposobów uczenia się emigrantów może być przesłanką dla organizowania poradnictwa międzykulturowego dla osiadłych cudzoziemców, nowych przybyszy z innej kultury, a także osób zamierzających opuścić własny kraj.
Źródło:
Studia Poradoznawcze; 2012, 1
2450-3444
Pojawia się w:
Studia Poradoznawcze
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model sytuacji kolizyjnej okrętu jako nie swobodny ruch złożony
Model ship collision situation with no free movement made
Autorzy:
Żak, B.
Powiązania:
https://bibliotekanauki.pl/articles/223416.pdf
Data publikacji:
2004
Wydawca:
Akademia Marynarki Wojennej. Wydział Dowodzenia i Operacji Morskich
Tematy:
obiekty pływające
sterowanie
kolizje
floating objects
control
collisions
Opis:
W pracy przedstawiono model matematyczny sytuacji kolizyjnej okrętu z wieloma napotkanymi obiektami pływającymi. Model ten został opisany z wykorzystaniem zasad ruchu wielokrotnie złożonego. Ponadto w pracy dokonano analizy przedstawionego modelu sytuacji kolizyjnej oraz zaprezentowano wnioski z niej wynikające.
The paper presents a mathematical model of a ship collision situation with several floating objects encountered. To describe the model the principles of multi-complex movement were used. In addition, the paper analyzes the model under a collision situation and shows conclusions drawn from it.
Źródło:
Zeszyty Naukowe Akademii Marynarki Wojennej; 2004, R. 45 nr 3 (158), 3 (158); 151-165
0860-889X
Pojawia się w:
Zeszyty Naukowe Akademii Marynarki Wojennej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Floating wicks without metal
Autorzy:
Moullou, Dorina
Garnett, Karen S
Powiązania:
https://bibliotekanauki.pl/articles/1634102.pdf
Data publikacji:
2020-01-04
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
ancient lighting
Ballota acetabulosa
loumini wick
floating wick
Opis:
Ancient lighting methods would have included natural materials which were easily available in rural, non-industrial areas. This paper examines one material, the loumini wick, and related methods which require no specialized vessels and no specialized “manufacturing” techniques and which can provide reliable and sustainable light at a reasonable price. Special attention is paid to how a loumini wick might be employed as a floating wick.
Źródło:
Polish Archaeology in the Mediterranean; 2019, 28(1); 169-180
1234-5415
Pojawia się w:
Polish Archaeology in the Mediterranean
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Loads on an Off-Shore Structure due to an Ice Floe Impact
Autorzy:
Staroszczyk, R.
Powiązania:
https://bibliotekanauki.pl/articles/241420.pdf
Data publikacji:
2007
Wydawca:
Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:
floating ice
offshore structure
dynamic impact
brittle fracture
Opis:
In the paper, the problem of dynamic impact of a floating ice sheet at an off-shore structure is considered. It is assumed that during an interaction event the dominant mechanism is the brittle fracture of ice at the ice--structure interface, that is, elastic and creep effects in ice are ignored. Since in natural conditions the edge of floating ice is usually irregular, the contact between a floe and an engineering object is imperfect. Thus, at any one time, the failure of ice occurs only in a number of small zones along a structure wall, leading to a highly irregular variation of forces exerted on the structure during the impact process. It is supposed in the analysis that the successive small-scale fracture events at the contact surface occur at random, and all these small-scale events take place independently of each other. An off-shore structure is modelled as a fixed and rigid circular cylinder with vertical walls. For an adopted geometry of the ice sheet, its initial horizontal velocity, and the variety of parameters describing the limit failure stresses in ice, the history of total loads sustained by the structure and the floe velocity variation are illustrated for a typical impact event. Furthermore, probability distributions for maximum impact forces exerted on the structure, depending on the floe size, its thickness and initial velocity, are determined.
Źródło:
Archives of Hydro-Engineering and Environmental Mechanics; 2007, 54, 2; 77-94
1231-3726
Pojawia się w:
Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Flow characteristics after installation of floating bridge in open channel
Autorzy:
Ibrahim, Mohamed M.
Eltoukhy, Mahmoud A.R.
Ghanim, Adnan D.
Powiązania:
https://bibliotekanauki.pl/articles/1844336.pdf
Data publikacji:
2021
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
floating bridges
flow characteristics
flume
head loss
velocity
Opis:
A pontoon bridge, also known as a floating bridge, can be used as for pedestrian and vehicle traffic. The buoyancy of the floating bridge limits the maximum load it can carry. This research included experimental runs to study variations of open channel flow characteristics upstream and downstream a floating bridge. Eighty one runs have been carried out using a flume in a hydraulic laboratory. The experimental run program is classified into two main categories; the first investigates the velocity ratios (vds/vus) downstream and upstream the floating bridge. The second category is concerned with the energy head losses (hL) due to the presence of a floating bridge. The experimental runs are carried out using three pontoon lengths, three flow depths, six submerged depths, and three discharges. The results are analysed and graphically presented to help predict hydraulic parameters. The outcomes have shown that the floating bridge upstream, Froude number and submergence of the pontoon are the dominant parameters that affect the studied flow characteristics.
Źródło:
Journal of Water and Land Development; 2021, 49; 244-251
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-25 z 179

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