Experimental study on rapid fabrication of a 316mm aperture free-form optical mirror

2020 ◽  
Author(s):  
Lingdi Xu ◽  
Zhaoming wang ◽  
Jing Zhao ◽  
Jiyou Zhang ◽  
Xu Chen
Keyword(s):  
Experimental Study ◽  
Free Form ◽  
Rapid Fabrication

scholarly journals An Experimental Study on the Effects of Communication, Credibility, and Clustering in Network Games

2021 ◽  
pp. 1-45
Author(s):  
Gary Charness ◽  
Francesco Feri ◽  
Miguel A. Meléndez-Jiménez ◽  
Matthias Sutter
Keyword(s):  
Experimental Study ◽  
Network Structure ◽  
Interaction Effect ◽  
Communication Technologies ◽  
Free Form ◽  
Network Games ◽  
Experimental Game ◽  
Efficient Outcome ◽  
Remarkable Result ◽  
Rapid Diffusion

Abstract We examine how pre-play communication and clustering affect play in a challenging hybrid experimental game on networks. Free-form chat is impressively effective in achieving the non-equilibrium efficient outcome, but restricted communication has little effect. We support this result with a model about the credibility of cheap-talk messages. We also offer a model of message diffusion that correctly predicts more rapid diffusion without clustering. We show an interaction effect of network structure and communication technologies. A remarkable result is that restricted communication is quite effective in a network Stag Hunt, but not in our extended game.

scholarly journals Free-Form Processing of Near-Net Shapes Using Directed Light Fabrication

1998 ◽  
Author(s):  
D.J. Thoma ◽  
G.K. Lewis ◽  
J.O. Milewski ◽  
R.B. Nemec
Keyword(s):  
Free Form ◽  
Microstructural Development ◽  
Metal Powders ◽  
3 Dimensional ◽  
Form Processing ◽  
Rapid Fabrication ◽  
Near Net Shape ◽  
Thermomechanical Processes ◽  
Model Computer ◽  
Thermal Spray Processes

Abstract Directed light fabrication (DLF) is a rapid fabrication process that fuses gas delivered metal powders within a focal zone of a laser beam to produce fully dense, near-net shape, 3- dimensional metal components from a computer generated solid model. Computer controls dictate the metal deposition pathways, and no preforms or molds are required to generate complex sample geometries with accurate and precise tolerances. The DLF technique offers unique advantages over conventional thermomechanical processes or thermal spray processes in that many labor and equipment intensive steps can be avoided to produce components with fully dense microstructures. Moreover, owing to the flexibility in power distributions of lasers, a variety of materials have been processed, ranging from aluminum alloys to tungsten, and including intermetallics such as MO5Si3. Since DLF processing offers unique capabilities and advantages for the rapid fabrication of complex metal components, an examination of the microstructural development has been performed in order to define and optimize the processed materials. Solidification studies of DLF processing have demonstrated that a continuous liquid/solid interface is maintained while achieving high constant cooling rates that can be varied between 10 to 105 Ks-1 and solidification growth rates ranging up to 10-2 ms-1.

scholarly journals AN EXPERIMENTAL STUDY FOR QUALITY ASSURANCE OF FREE-FORM CONCRETE PANELS PRODUCED BY CNC MACHINE

2018 ◽  
Vol 24 (2) ◽  
pp. 145-154 ◽  
Author(s):  
Jeeyoung LIM ◽  
Do Yeong KIM ◽  
Sunkuk KIM
Keyword(s):  
Experimental Study ◽  
Quality Assurance ◽  
Labor Cost ◽  
Free Form ◽  
Shape Error ◽  
Cnc Machine ◽  
Concrete Panels ◽  
Short Time ◽  
Change Material

Various studies have been conducted to construct free-form buildings, but it still takes a lot of labor, cost, and time to assure the accuracy of designed shapes. In particular, molds for the production of free-form concrete panels (FCPs) are putting enormous burdens on productivity and cost. To produce FCPs economically, a computerized numeric control (CNC) machine that produces phase change material (PCM) molds for persistent use was developed in this study. The technology using CNC machine can produce precisely free-form molds and panels in a short time compared to the manual method. However, in order to commercialize this technology, it is necessary to verify the shape error of the FCPs. Therefore, the purpose of this paper is an experimental study for securing FCP quality produced by a CNC machine. The results of this study will be used to mass-produce uniform quality of FCPs without depending on the skill and workmanship of the labo.

scholarly journals EXPERIMENTAL STUDY OF LIPOSOMAL DOCETAXEL ANALYSIS OF DOCETAXEL INCORPORATION AND STABILITY

2017 ◽  
Vol 39 (2) ◽  
pp. 121-123 ◽  
Author(s):  
Y M Krasnopolsky ◽  
A S Dudnichenko
Keyword(s):  
Experimental Study ◽  
Large Scale ◽  
Phospholipid Composition ◽  
Free Form ◽  
Scale Production ◽  
Optimal Composition ◽  
Liposomal Form ◽  
Large Scale Production ◽  
The Stability ◽  
Nanosize Particle

Aim: The article presents the results of developing the composition and technology of obtaining the liposomal form of docetaxel. The effect of the phospholipid composition of the membrane, ionic strength, pH, temperature, cryoprotectant type, and other factors on the stability of liposomes and the docetaxel incorporation has been considered. Results: Reduction of toxicity of the liposomal form of docetaxel (LD50 — 137 ± 7.7 mg/kg) was found in comparison with its free form (LD50 — 101 ± 6.3 mg/kg). Preservation of nanosize particle after lyophilization has been shown. Conclusions: As a result of the studies, the optimal composition and technological scheme for obtaining liposomes containing docetaxel have been developed allowing large-scale production of docetaxel in liposomal form.

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

An Experimental Study of Some Properties of Stuttered Words

1962 ◽  
Vol 5 (4) ◽  
pp. 387-394 ◽  
Author(s):  
Bruce Quarrington ◽  
Jerome Conway ◽  
Nathan Siegel
Keyword(s):  
Experimental Study
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