Results 21 to 30 of about 6,905,915 (330)

Exploring the "firefight line" principle contained in tactical thinking [PDF]

open access: yesZhihui kongzhi yu fangzhen
This paper first constructs a simple valley combat model and a plain combat model, and calculates the battle time and casualties of both. Then, two scenarios are compared and analyzed, and the concept of "firefight line" is proposed.
MAO Weihao
doaj   +1 more source

Semi-autonomous scheme for pushing micro-objects [PDF]

open access: yes, 2009
-In many microassembly applications, it is often desirable to position and orient polygonal micro-objects lying on a planar surface. Pushing micro-objects using point contact provides more flexibility and less complexity compared to pick and place ...
Khan, Shahzad   +2 more
core   +1 more source

Skyline Tensile Forces in Cable Logging: Field Observations vs. Software Calculations

open access: yesCroatian Journal of Forest Engineering, 2021
Skyline tensile forces have been shown to frequently exceed the recommended safety limits during ordinary cable logging operations. Several models for skyline engineering analyses have been proposed.
Omar Mologni   +5 more
doaj   +1 more source

On the effect of drag forces in mooring system restoring forces

open access: yesMATEC Web of Conferences, 2017
Mooring line is a major source of stability and plays a key role in the global response of offshore floating wind turbine. In the current state of the research, a formulation based on the analytical catenary equation is most commonly used for the ...
Ullah Zahid   +3 more
doaj   +1 more source

Distribution and change of stresses, slippage, tension, and friction forces in wound rolls (Simulation of center winding without nip)

open access: yesNihon Kikai Gakkai ronbunshu, 2021
Distribution and change of roll stresses, slippage, web tension, and friction forces during winding rolls are investigated using commercial FEM software.
Shigeo YANABE, Shigeru NAGASAWA
doaj   +1 more source

Barnett-Pegg formalism of angle operators, revivals, and flux lines [PDF]

open access: yes, 2000
We use the Barnett-Pegg formalism of angle operators to study a rotating particle with and without a flux line. Requiring a finite dimensional version of the Wigner function to be well defined we find a natural time quantization that leads to classical ...
Arul Lakshminarayan   +12 more
core   +2 more sources

Line Defects in Two-Dimensional Dodecagonal Quasicrystals

open access: yesMathematics
In this work, line defects in two-dimensional dodecagonal quasicrystals are investigated. Using the ten-dimensional framework of the integral formalism of two-dimensional quasicrystals, the closed-form solutions for the displacement fields and stress ...
Markus Lazar
doaj   +1 more source

Informatyczne wspomaganie procesów kadrowych w Siłach Zbrojnych RP na przykładzie sieciowego systemu ewidencji wojskowej „SEW on-line”

open access: yesNowoczesne Systemy Zarządzania, 2017
Focus article covers important issue on information technology staffmg processes support in the armed forces. For example, the network of military Records, ,,SEW on-line" to learn the practical application of information technology in staffing processes.
Kazimierz PIOTRKOWSKI
doaj   +1 more source

Adhesion forces for water/oil droplet and bubble on coking coal surfaces with different roughness

open access: yesInternational Journal of Mining Science and Technology, 2021
Surface roughness plays a significant role in floatability of coal. In the present paper, coking coal surface was polished by three different sandpapers and the surface properties were characterized by contact angle and roughness measurements. The effect
Chunyun Zhu   +3 more
doaj   +1 more source

Contact-Angle Hysteresis and Contact-Line Friction on Slippery Liquid-like Surfaces

open access: yesLangmuir, 2020
Contact-line pinning and dynamic friction are fundamental forces that oppose the motion of droplets on solid surfaces. Everyday experience suggests that if a solid surface offers low contact-line pinning, it will also impart a relatively low dynamic ...
Hernán Barrio-Zhang   +5 more
semanticscholar   +1 more source

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