Results 71 to 80 of about 66,342 (341)

Centerline latch tool for contingency orbiter door closure [PDF]

open access: yes, 1982
The centerline latch tool was designed and developed as an EVA manual backup device for latching the Space Shuttle Orbiter's payload bay doors for reentry in case of a failure of the existing centerline latches to operate properly.
Trevino, R. C.
core   +1 more source

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

open access: yesAdvanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger   +11 more
wiley   +1 more source

Prediction Model for Wheat Grain Losses in Header of Simulator by Using Dimensional Analysis Approach [PDF]

open access: yesJournal of Agricultural Machinery, 2018
Introduction One of the problems which considered in recent years for grain harvesting is loss of wheat during production until consumption and tenders the offers for prevention of its especially in harvesting times by combine harvesting machine.
R Karmulla Chaab   +3 more
doaj   +1 more source

Simulation of multi-axis machining processes using z-mapping technique [PDF]

open access: yes, 2011
Parameter selection in machining operations is curial for product quality and high productivity. Process parameters such as feed, spindle speed and depth of cuts are often chosen by trial-error methods.
Budak, Erhan   +4 more
core  

Simplified Production of Large Prototypes using Visible Slicing [PDF]

open access: yes, 2005
Rapid Prototyping (RP) is a totally automatic generative manufacturing technique based on a “divide-and-conquer” strategy called ‘slicing’. Simple slicing used on 2.5-axis kinematics of the existing RP machines is responsible for the staircase error ...
Dwivedi, Rajeev   +5 more
core   +1 more source

3D (Bio) Printing Combined Fiber Fabrication Methods for Tissue Engineering Applications: Possibilities and Limitations

open access: yesAdvanced Functional Materials, EarlyView.
Biofabrication aims at providing innovative technologies and tools for the fabrication of tissue‐like constructs for tissue engineering and regenerative medicine applications. By integrating multiple biofabrication technologies, such as 3D (bio) printing with fiber fabrication methods, it would be more realistic to reconstruct native tissue's ...
Waseem Kitana   +2 more
wiley   +1 more source

Research on cylindrical indexing cam’s unilateral machining

open access: yesAdvances in Mechanical Engineering, 2015
The cylindrical cam ridge of the indexer is a spatial curved surface, which is difficult to design and machine. The cylindrical cam has some defects after machining because conventional machining methods have inaccuracies.
Junhua Chen   +3 more
doaj   +1 more source

Modeling of Convex Surface Topography in Milling Process

open access: yesMetals, 2020
Cr12MoV die steel is a typical high-strength and high-hardness material. Because of the high hardness of Cr12MoV die steel, which is approximately 50–65 HRC after quenching, and the tool’s weak rigidity, cutting vibration, and tool deformation are ...
Xiaole Hao   +5 more
doaj   +1 more source

An evaluation of important criteria for measuring the facade condition of old shophouses in Malaysia [PDF]

open access: yes, 2017
Preserving the facade of the old shop houses is important to reflect the image of an attractive townscape. Be-sides having a unique architectural motif, the facade of an old shop houses also has a high heritage value, particularly in terms of how it was ...
Abd Rahman, Sa’afilah   +2 more
core   +1 more source

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