Temat: strip - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Pure bending of strip (beam) with crack in strip of tensile stress with allowance for plastic strips near crack tips
Autorzy:: Sulym, Heorgij
Opanasovych, Viktor
Slobodian, Mykola
Bilash, Oksana
Powiązania:: https://bibliotekanauki.pl/articles/387360.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:: pure bending
strip
beam
crack
plastic strip
linear conjugation problems
Opis:: In the article, the pure bending problem for strip (beam) with straight, perpendicular to its axis crack located in the zone of tensile stresses is investigated on the assumption of narrow plastic strips near crack tips. Using methods of the theory of functions of a complex variable and complex potentials, the problem is reduced to the several linear conjunction problems. The solutions of latter problems are ob-tained in the class of functions confined in the edges of plastic strips. Formulas for the calculation of their lengths are derived. Expressions for the determination of crack tip opening values are written. Numerical analysis of the problem is performed.
Źródło:: Acta Mechanica et Automatica; 2020, 14, 1; 44-49
1898-4088
2300-5319
Pojawia się w:: Acta Mechanica et Automatica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Polityka Izraela wobec Strefy Gazy po 2005 r.
Israel`s policy towards the Gaza Strip after 2005
Autorzy:: Guzowski, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/505861.pdf
Data publikacji:: 2014
Wydawca:: Krakowska Akademia im. Andrzeja Frycza Modrzewskiego
Tematy:: Gaza Strip
Hamas, Israel
Palestine
Opis:: The 2005 Israeli disengagement from the Gaza Strip dramatically changed the political situation of said territory. Due to the poor economic situation of its inhabitants, itself caused by years of Israeli policy of isolation, and general perception of being mistreated by the Israeli government, the power vacuum created in the wake of the withdrawal was filled by Hamas. The fundamentalists took control of the Gaza Strip in 2007, which caused the decision-makers in Tel Aviv to take radical measures to deal with the organization. A tight blockade of the Gaza Strip was introduced and while it may have curbed some of Hamas activities, it also worsened the living conditions of the inhabitants, creating a humanitarian crisis. Israeli policy has been criticized by many members of the international community. Moreover, Tel Aviv carried out several military operations, two of which (“Cast Lead” in 2008/2009 and “Protective Edge” in 2014) were characterized by significantly high numbers of civilian deaths. All of these actions, aimed at eliminating terrorists and improving Israeli citizens' security, seem to be rather short-sighted. Israeli policy only popularizes Hamas propaganda among Palestinians, therefore strengthening the organization and creating a vicious circle of misery and violence.
Źródło:: Krakowskie Studia Międzynarodowe; 2014, 3; 131-145
1733-2680
2451-0610
Pojawia się w:: Krakowskie Studia Międzynarodowe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Effects of strip roads on volume increment of edge trees
Autorzy:: Stempski, Włodzimierz
Jabłoński, Krzysztof
Jakubowski, Jakub
Powiązania:: https://bibliotekanauki.pl/articles/2067433.pdf
Data publikacji:: 2021
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:: strip road
wood increment
sunlight influx
Opis:: An analysis was made of 13-year wood volume increments on pine trees growing in the immediate vicinity of strip roads, at distances of 2-4 m and 8-10 m (the control). The widths of the strip roads were 3.5 m (short wood extraction with a forwarder) and 2.5 m (long wood skidding with an agricultural tractor), and they were cut during the first thinning. Also, compensation for the lost wood, resulting from increased growth of trees near the strip roads, was estimated. Tree volumes were calculated by the tree section method, based on measurements of yearly tree rings, taken with an electronic caliper on wood disks cut from the centers of 2-meter-long tree sections taken from sample trees. The percentage compensation for volume losses was calculated by comparing the increased volume increment of edge trees with the volume (and its 13-year lost increment) of trees removed from the strip roads. The study showed an increased volume increment of edge trees compared with trees growing deeper in the stand. In the case of wider strip roads, the increased volume increment was also present on trees growing at a distance of about 3 m from the strip roads. After 13 years the increased volume increment on trees bordering the strip roads and growing at a distance of 2-4 m from the strip roads compensated for 35% (wider strip roads) and 28% (narrower strip roads) of the lost wood volume and its unrealized increment.
Źródło:: Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2021, 64, 208; 5--15
1644-3985
Pojawia się w:: Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Organization of the highway strip repair process
Autorzy:: Ćwik, D.
Olkowska, E.
Kowalski, M.
Powiązania:: https://bibliotekanauki.pl/articles/949503.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: highway strip
airfields
airstrips
runway repair processes
Opis:: The article presents the possibilities of advance development of detailed organization-technical plans for the repair of Highway Strips, which will enable their effective use, particularly during combat operations – while maintaining the required time and technical standards at the same time. The main objectives of Highway Strips were presented; their role in securing military aviation activities and historical conditions for their creation. The concept of HS (Highway Strip) was defined along with the modern principles for their construction, modernization and renovation. Based on a selected example, the principles for evaluating the technical condition of their pavement and the repair possibility assessment were presented. At the same time, typical damage to HSs and factors affecting such damage were presented. Next, the methods and technologies for repairing various types of bituminous pavement damage repairs were discussed, with particular emphasis on the methods of repairing cracks, surface damage, deep damage and asphalt renovation. A schedule for the “Wielbark” highway strip was also developed, and the necessary calculations of the repair times, as well as the resources and resources for securing these operations were made. The article is concluded with a short summary and a proposal for further work, aimed at inhibiting the destructive processes of Highway Strips in Poland.
Źródło:: Journal of KONES; 2018, 25, 3; 111-120
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Review of current knowledge on strip-till cultivation and possibilities of its popularization in Poland
Autorzy:: Różewicz, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/2148464.pdf
Data publikacji:: 2022-06-30
Wydawca:: Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
Tematy:: strip-till
cultivation systems
soil quality
yield
Opis:: In this review paper strip-till has been characterized from the point of view of the latest scientific research and practi- cal justification of the advisability of using and popularizing this cultivation method in Poland for various crop species. Analysis of scientific literature has shown that strip-till has a beneficial ef- fect on crops and soil properties. It reduces the number of tillage operations, and thus labour costs and fuel consumption. Further improvement of strip-till cultivation should be related to the im- provement of seeding units designed for this cultivation technol- ogy, as well as to the implementation of precision farming solu- tions related to the application of fertilizers and their effective use by plants. In connection with the implementation of cultivation technologies improving soil quality and reducing the negative im- pact of agriculture on the environment, strip-till technology has a chance to be much more widely used in Poland and may replace traditional plough tillage.
Źródło:: Polish Journal of Agronomy; 2022, 49; 20-30
2081-2787
Pojawia się w:: Polish Journal of Agronomy
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The Effect of Low Deformation Asymmetric Rolling on Microstructure and Texture of the Polycrystalline Copper
Autorzy:: Uniwersał, A.
Wróbel, M.
Wroński, S.
Kalemba-Rec, I.
Wroński, M.
Wierzbanowski, K.
Baczmański, A.
Bacroix, B.
Powiązania:: https://bibliotekanauki.pl/articles/353907.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: asymmetric rolling
polycrystalline copper
microstructure refinement
strip curvature
Opis:: In the most recent years the asymmetric rolling (AR) attracts attention of researchers and technologists. This process can improve some technological parameters (e.g. modification of rolling torque and load, power requirements, etc.) as well as provide the possibility of grain refinement in a relatively inexpensive way. Most of the reports concerning microstructural changes produced by AR refer to high deformations imposed in highly asymmetric conditions. However, such rolling conditions are difficult to control, so there are no prospects to their quick industrial implementation. The present paper refers to relatively low deformation and low asymmetry rate, that is much more interesting for the industry. It was shown that bending of the rolled band (important disadvantage of the AR technology) can be controlled by adjusting of the amount of deformation and asymmetry. It was also shown that ca. 30% reduction in thickness during cold rolling, together with a relatively low asymmetry, reduces significantly the grain size and produces a more fragmented microstructure inside grains of the polycrystalline copper comparing to the symmetric rolling (SR). The material hardness after AR is higher than after the SR. Moreover, the crystallographic texture asymmetry, expressed by its rotation around the transverse direction, is observed in the AR material.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 4; 2183-2188
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Soil types and their relations with radon concentration levels in Middle Governorate of Gaza Strip, Palestine
Autorzy:: Ubeid, Khalid Fathi
Ramadan, Khaled Ahmed
Powiązania:: https://bibliotekanauki.pl/articles/2088223.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:: grain-size distribution
radon
pollution
Gaza Strip
Palestine
Opis:: Determination of natural radioactivity has been carried out in surface and core agricultural soil samples collected from various sites in the Middle Governorate – Gaza Strip, Palestine. Mechanical and chemical analysis has been done to determine soil characteristics. Radon activity concentration measurements were carried out using solid state nuclear tracks detectors, Cr-39. The mechanical analysis results show that they belong to two classes, sandy loam and loamy sand. The sandy loam soil was observed in the eastern side of the study area, whereas the loamy sand was observed in western and middle parts. The radon concentration levels were higher in core samples and were proportionate to the soil depth. Also they were higher in sandy loam than loamy sand soil samples. The radon concentration levels had a positive correlation with fine grains (clay- to silt-size) of soil sample which translocated from upper to lower horizons of soil during its development. Additionally, there was a positive correlation with pH and water content, whereas a negative correlation was observed with organic matter and potassium contents. The positive correlation referred to a large specific surface of fine grains which were located in lower horizons of soil and were able to adsorb more water and consequently led to high radon concentration levels.
Źródło:: Polish Journal of Soil Science; 2020, 53, 1; 55-72
0079-2985
Pojawia się w:: Polish Journal of Soil Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Soil types and their relations with radon concentration levels in Middle Governorate of Gaza Strip, Palestine
Autorzy:: Ubeid, K.F.
Ramadan, K.A.
Powiązania:: https://bibliotekanauki.pl/articles/971260.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:: grain-size distribution
radon
pollution
gaza strip
palestine
Opis:: Determination of natural radioactivity has been carried out in surface and core agricul- tural soil samples collected from various sites in the Middle Governorate – Gaza Strip, Palestine. Mechanical and chemical analysis has been done to determine soil characteristics. Radon activity concentration measurements were carried out using solid state nuclear tracks detectors, Cr-39. The mechanical analysis results show that they belong to two classes, sandy loam and loamy sand. The sandy loam soil was observed in the eastern side of the study area, whereas the loamy sand was observed in western and middle parts. The radon concentration levels were higher in core samples and were proportionate to the soil depth. Also they were higher in sandy loam than loamy sand soil samples. The radon concentration levels had a positive correlation with fine grains (clay- to silt-size) of soil sample which translocated from upper to lower horizons of soil during its development. Additionally, there was a positive correlation with pH and water content, whereas a negative correlation was observed with organic matter and potassium contents. The positive cor- relation referred to a large specific surface of fine grains which were located in lower horizons of soil and were able to adsorb more water and consequently led to high radon concentration levels.
Źródło:: Polish Journal of Soil Science; 2020, 53, 1
0079-2985
Pojawia się w:: Polish Journal of Soil Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Avigdor Lieberman’s policy towards the European Union
Autorzy:: Zawada, Przemysław
Powiązania:: https://bibliotekanauki.pl/articles/521544.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Wrocławski. Wydział Nauk Społecznych. Instytut Studiów Międzynarodowych
Tematy:: Avigdor Lieberman
Gaza Strip
European Union
political influence
Źródło:: Wschodnioznawstwo; 2017, 11; 457-468
2082-7695
Pojawia się w:: Wschodnioznawstwo
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Efficient Positioning of Two Long-Range Passenger Aircraft in Formation Flight
Autorzy:: Antczak, Adam
Lasek, Maciej
Sibilski, Krzysztof
Powiązania:: https://bibliotekanauki.pl/articles/36782619.pdf
Data publikacji:: 2022
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:: formation flight
optimisation
strip theory
dynamics of flight
Opis:: In today’s world, each airline is forced to look for new savings opportunities. One of the methods may be the use of formation flights in daily flight operations, which may allow a reduction in fuel consumption by several percentages. The paper presents the genesis of how the consideration of such flights and the possibility of their implementation in an airline had started. The leader’s plane generates vortices, which, with the proper alignment of the planes to one another, can reduce the drag on the wingman. However, the wrong position may not only have no positive effect but also may be a threat to stable wingman flight. The article presents a method of using these vortices in such a way as to have a positive impact on the aerodynamics of the wingman. A favourable position in the vertical and horizontal axes will be determined in relation to the vortex generated by the leader’s plane in order to obtain the greatest benefit in reducing fuel consumption. The paper presents an operational analysis of the possibility of maintaining such a distance to obtain profit on fuel but also to ensure the highest level of safety of the flight.
Źródło:: Transactions on Aerospace Research; 2022, 3 (268); 21-31
0509-6669
2545-2835
Pojawia się w:: Transactions on Aerospace Research
Dostawca treści:: Biblioteka Nauki

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