scholarly journals A Novel “Gun-Barrel” Rhinoplasty Ruler for Precise Graft Measurement

2021 ◽  
Vol 4 (3) ◽  
pp. 91-93
Author(s):  
Richard J. Fox ◽  
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Sim Choroomi ◽  
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Keyword(s):  
2013 ◽  
Vol 712-715 ◽  
pp. 2281-2284
Author(s):  
Xiang Fei Meng ◽  
Chang Ming Wang

To solve the problem that bending caused by the weight of gun barrel will affect firing accuracy, the paper put forward a method that uses position sensitive detector (PSD) , gun barrel robot and some other testing equipments to carry on a automated measurement on gun barrel, and establish a correcting model according to the measured results. By this way it can amend gun launch angle to improve firing accuracy and the hitting accuracy of first Shot.


2020 ◽  
Vol 309 ◽  
Author(s):  
Maciej Kuliczkowski

The purpose of this article is, inter alia, to determine whether it is possible to define the time that has elapsed since the last shot from a firearm, based on chemical tests of the post-firing residue remaining in the interior of the gun barrel after combustion of gunpowder and firing the primer mass, using Griess reagent. The article also presents the firearm examination findings related to the use of Griess reagent, including the risk of falsification of the results due to previous use of red fluorescent dye in dactyloscopic firearm examinations.


2017 ◽  
Vol 5 (1) ◽  
pp. 148-159 ◽  
Author(s):  
Louisa D. Raisbeck ◽  
Jed A. Diekfuss

Performance benefits exist for an external focus of attention compared with an internal focus of attention for performance and learning (Wulf, 2013). It is unknown, however, if varying the number of verbal cues affects learning and performance. Focus of attention and the number of verbal cues were manipulated during a simulated handgun-shooting task. For the internal focus conditions, participants were told to focus on their hand, arm, and wrist, whereas the external focus instructions were to focus on the gun, gun barrel, and gun stock. To manipulate the number of verbal cues, participants received instruction to focus on a single verbal cue or multiple verbal cues. Shooting performance was assessed at baseline, acquisition, and at two separate retention phases (immediate, delayed) that included transfer tests. Participants completed the NASA—Task Load Index to assess workload following all trials. Participants who received one verbal cue performed significantly better during immediate retention than those who received three verbal cues. Participants who used external focus of attention instructions had higher performance and reported less workload at delayed retention compared to those who used internal focus instructions. This research provides further support for the benefits of an external focus and highlights the importance of minimizing the number of verbal cues.


Author(s):  
Jai Nendran Goundar ◽  
M. Rafiuddin Ahmed ◽  
Young-Ho Lee

Marine current energy is a reliable and clean source of energy. Many marine current turbines have been designed and developed over the years. Placement of an appropriately designed duct or shroud around the turbine significantly improves the turbine performance. In the present work, a ducted Savonius turbine (DST) is designed and optimized and its performance analysis carried out. The components of DSTs are simple and easily available and can be manufactured in developing countries like Fiji. A scaled-down model of 1/20 of a DST was fabricated and tested in a water stream at a velocity of 0.6 m/s and the results were used to validate the results from a commercial computational fluid dynamics (CFD) code ANSYS-cfx. Finally, a full-scale DST was modeled to study the flow characteristics in the turbine and the performance characteristics. The maximum efficiency of the turbine is around 50% at the tip speed ratio (TSR) of 3.5 and the maximum shaft power obtained is 10 kW at the rated speed of 1.15 m/s and around 65 kW at a freestream velocity of 2.15 m/s. The stress distribution on the ducted turbine was also obtained.


2006 ◽  
Vol 21 (6) ◽  
pp. 591-596 ◽  
Author(s):  
Animesh Bose ◽  
Robert J. Dowding ◽  
Jeffrey J. Swab
Keyword(s):  

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