Baltimore, MD, United States
Baltimore, MD, United States

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Peretz A.,Advanced Defense Technologies | Einav O.,Advanced Defense Technologies | Hashmonay B.-A.,Advanced Defense Technologies | Birnholz A.,Advanced Defense Technologies | Sobe Z.,Advanced Defense Technologies
Journal of Propulsion and Power | Year: 2011

The results of efforts to establish a laboratory-scale setup for hot-fire testing of a modular hybrid rocket motor and experimental evaluation of the effect of several additives on the regression rates of hydroxyl-terminated- polybutadiene-based fuels are presented. Supercharged nitrous oxide was used as the oxidizer in all tests. The main objectives of the reported test-program phase were the design and buildup of the experimental facility and to sort out, by hot-fire tests, various fuel compositions with respect to the fuel regression rate and combustion-extinction ability at oxidizer shutoff. The cartridge-loaded fuel grains had an initial circular port diameter of 42 mm, a length of 400 mm, and a web thickness of 15 mm. Five fuel composition families with various additive contents of fine ammonium perchlorate, polystyrene, and a burning-rate catalyst were tested. The fuel regression rate increased with the increase in the ammonium perchlorate portion, but combustion extinguishment was not possible with high ammonium perchlorate content. A significant enhancement of the regression rate of up to 3:5 mm=s at an average oxidizer mass flux of about 140 kg=m2 . s (0:2 lbm=in2 . s) was obtained with the addition of both fine ammonium perchlorate and large particles of polystyrene. Full combustion extinguishment and multipulse operation with an insignificant effect on the regression rate was demonstrated by the use of large particles of polystyrene additive and no addition of ammonium perchlorate. Copyright © 2010 by Arie Peretz and Omry Einav, RAFAEL Advanced Defense Systems, Ltd..


Rahimi S.,Defense Systems | Rahimi S.,Advanced Defense Technologies | Peretz A.,Defense Systems | Peretz A.,Advanced Defense Technologies | And 2 more authors.
Journal of Propulsion and Power | Year: 2010

A study was conducted to demonstrate the rheological matching of fuel, oxidizer, and simulant gels using various gellants, separately or combined. An investigation of the effect of temperature on the rheological parameters of water-based and gel-propellant simulants, formulated by various gellant combinations at different ratios among them was presented. Various gels of hydrazine and JP-8 fuels, hydrogen peroxide oxidizer, and water-based simulant gels were prepared to conduct the investigations. The rheological characterization of selected fuel, oxidizer, and simulant gels was carried out using a TA-CSL2100 rotational rheometer with cone-and-plate and parallel-plates configurations. The existence of no-slip conditions during all experiments was verified. It was also demonstrated that the rheological parameters for these types of gels obtained in simple shear measurements agreed closely to those obtained in uniaxial elongation measurements.


Trademark
Advanced Defense Technologies | Date: 2016-10-13

Chemical additives used to enhance the physical properties of polymers and polyuria; chemical used in industry; chemicals used in the manufacture of fabric or textiles; chemical additives and agents for strengthening materials for ballistic protection and bullet resistance.


Trademark
Advanced Defense Technologies | Date: 2016-10-13

Chemical additives used to enhance the physical properties of polymers and polyuria; chemical used in industry; chemicals used in the manufacture of fabric or textiles; chemical additives and agents for strengthening materials for ballistic protection and bullet resistance.


Trademark
Advanced Defense Technologies | Date: 2016-10-13

Protective ballistic resistant and blast resistant body armor, plates, clothing and garments.


Trademark
Advanced Defense Technologies | Date: 2016-10-13

Protective ballistic resistant and blast resistant body armor, plates, clothing and garments.


Trademark
Advanced Defense Technologies | Date: 2016-11-10

Protective ballistic resistant and blast resistant body armor, plates, clothing and garments.


Trademark
Advanced Defense Technologies | Date: 2016-11-10

Protective ballistic resistant and blast resistant body armor, plates, clothing and garments.


PubMed | Johns Hopkins Hospital, Analysis Inc. and Advanced Defense Technologies
Type: Journal Article | Journal: American journal of health-system pharmacy : AJHP : official journal of the American Society of Health-System Pharmacists | Year: 2016

Developmental pharmaceutical manufacturing systems and techniques designed to overcome the shortcomings of traditional batch processing methods are described.Conventional pharmaceutical manufacturing processes do not adequately address the needs of military and civilian patient populations and healthcare providers. Recent advances within the Defense Advanced Research Projects Agency (DARPA) Battlefield Medicine program suggest that miniaturized, flexible platforms for end-to-end manufacturing of pharmaceuticals are possible. Advances in continuous-flow synthesis, chemistry, biological engineering, and downstream processing, coupled with online analytics, automation, and enhanced process control measures, pave the way for disruptive innovation to improve the pharmaceutical supply chain and drug manufacturing base. These new technologies, along with current and ongoing advances in regulatory science, have the future potential to (1) permit on demand drug manufacturing on the battlefield and in other austere environments, (2) enhance the level of preparedness for chemical, biological, radiological, and nuclear threats, (3) enhance health authorities ability to respond to natural disasters and other catastrophic events, (4) minimize shortages of drugs, (5) address gaps in the orphan drug market, (6) support and enable the continued drive toward precision medicine, and (7) enhance access to needed medications in underserved areas across the globe.Modular platforms under development by DARPAs Battlefield Medicine program may one day improve the safety, efficiency, and timeliness of drug manufacturing.

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