نتایج جستجو برای: ballistic gel

تعداد نتایج: 111310  

Journal: :anesthesiology and pain medicine 0
ethan rand department of rehabilitation and regenerative medicine, presbyterian hospital, new york, the united states george christolias department of rehabilitation and regenerative medicine, columbia university medical center, presbyterian hospital, new york, the united states christopher visco department of rehabilitation and regenerative medicine, columbia university medical center, presbyterian hospital, new york, the united states jaspal r. singh department of rehabilitation and regenerative medicine, weill cornell medicine spine center, presbyterian hospital, new york, the united states; department of rehabilitation and regenerative medicine, weill cornell medicine spine center, presbyterian hospital, 525 east 68th street, baker 16, new york, the united states. tel: +01-2127461500, fax: +01-2127468303

conclusions there is clinical utility in knowing the relative deflection of various needle tips. when a procedure requires a needle to be steered around obstacles, or along non-collinear targets, the predictable and large amount of deflection obtained through use of a beveled spinal needle may prove beneficial. materials and methods six needles commonly used in spinal procedures (quincke, short...

Journal: :World journal of emergency medicine 2015
Richard Amini Jeffrey Z Kartchner Lori A Stolz David Biffar Allan J Hamilton Srikar Adhikari

BACKGROUND Ultrasonography use is increasing in emergency departments, and ultrasound education is now recommended in resident training. Ultrasound phantoms are used in many institutions for training purposes. The purpose of this study is to describe an inexpensive and simple method to create ultrasound-imaging models for the purpose of education and practice using clear ballistic gel. METHOD...

Journal: : 2022

Results of studying the glow that occurs when a bullet passes through ballistic gel are presented. This phenomenon is all more interesting as in various areas gel, including those have not contacted directly with bullet. The emission spectrum consists mainly continuous component atomic lines superimposed on it. can be explained different ways: one options thermal radiation; however, description...

Journal: :The American journal of forensic medicine and pathology 2012
Ryan Blumenthal Ian R Jandrell Nicholas J West

Five mechanisms have been described in the literature regarding lightning injury mechanisms. A sixth mechanism is proposed in this article, namely, lightning barotrauma. A simple laboratory experiment was conducted using ordnance gelatin for ballistic studies. Lightning was simulated in a high-voltage laboratory using an 8/20-microsecond current impulse generator and discharged through ballisti...

Journal: :رادار 0
محمد نوری پرکستانی مرتضی کازرونی حمید حیدر

in this paper, the range doppler algorithm (rda) for synthetic aperture radar moving on a ballistic trajectory is presented. the 3-dimension acceleration and non-uniform trajectory cause decreases in efficiency of conventional imaging algorithms. in this paper, the analytical expression for the 2-d signal spectrum for ballistic trajectory using taylor series expansion and series reversion is de...

2016
Ethan Rand George Christolias Christopher Visco Jaspal R. Singh

BACKGROUND Percutaneous diagnostic and therapeutic procedures are commonly used in the treatment of spinal pain. The success of these procedures depends on the accuracy of needle placement, which is influenced by needle size and shape. OBJECTIVES The purpose of this study is to examine and quantify the deviation of commonly used spinal needles based on needle tip design and gauge, using a bal...

ژورنال: مواد پرانرژی 2013

Generally, storage long time gun propellants cause negative ballistic effects. thus, retain ballistic stability of gun propellants during storage is one of the requirement new gun propellants. in this paper, deals with the ballistic stability conventional and new gun propellants. Therewithal, effective factors on ballistic stability and changing ballistic parameters (muzzle velocity & peak pres...

Journal: :Physical review letters 2001
L Ramos L Cipelletti

We use linear rheology and multispeckle dynamic light scattering (MDLS) to investigate the aging of a gel composed of multilamellar vesicles. Light scattering data indicate rearrangement of the gel through an unusual ultraslow ballistic motion. A dramatic slowdown of the dynamics with sample age t(w) is observed for both rheology and MDLS, the characteristic relaxation time scaling as t(mu)w. W...

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