This paper will provide the reader with an in-depth description of the armyresearch, development & engineeringcommand's (RDECOM) Joint sATCOM engineering Center (JsEC) located at Fort Monmouth, NJ. The JsEC ...
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ISBN:
(纸本)081945804X
This paper will provide the reader with an in-depth description of the armyresearch, development & engineeringcommand's (RDECOM) Joint sATCOM engineering Center (JsEC) located at Fort Monmouth, NJ. The JsEC is a one-of-a-kind, state-of-the-art facility that has been in existence for over 30 years and has expanded to become a well respected and versatile engineering and research facility that supports all of the military services, Department of Defense (DoD) agencies, special users, as well as private industry and academia. The JsEC is divided into four functional areas: the Control systems Laboratory (CsL), the strategic systems Laboratory (ssL), the Tactical systems Laboratory (TsL) and the DoD Teleport Testbed (DTT). This paper will touch on the JsEC and the four functional areas in general and it will highlight the most recent addition to the JsEC, the DoD Teleport Testbed. Each functional area with its own mission, expertise and unique assetssupport the research, development, performance evaluation, system and equipment certification testing and anomaly resolution of space dependent and space based communicationssystems and equipment in the EHF, Ka, sHF and uHF frequency bands. The JsEC is also utilized to help mitigate program risk by using satellite simulation and participation in annual joint service communications exercises that serve as a platform to prove out real world requirements in a more controlled atmosphere.
The main objective of the u.s.army's Active Coatings Technologies Program is to develop technologies that can be used in combination to tailor coatings for utilization on army Materiel. The Active Coatings Techno...
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ISBN:
(纸本)9780819466495
The main objective of the u.s.army's Active Coatings Technologies Program is to develop technologies that can be used in combination to tailor coatings for utilization on army Materiel. The Active Coatings Technologies Program, ACT, is divided into several thrusts, including the smart Coatings Materiel Program, Munitions Coatings Technologies, Active sensor packages, systems Health Monitoring, Novel Technology development, as well as other advanced technologies. The goal of the ACT Program is to conduct research leading to the development of multiple coatingssystems for use on various military platforms, incorporating unique propertiessuch asself repair, selective removal, corrosion resistance, sensing, ability to modify coatings' physical properties, colorizing, and alerting logisticsstaff when tanks or weaponry require more extensive repair. A partnership between the u.s.army Corrosion Office at Picatinny Arsenal, NJ along with researchers at the New Jersey Institute of Technology, NJ, Clemson university, sC, university of New Hampshire, NH, and university of Massachusetts (Lowell), MA, are developing the next generation of smart Coatings Materiel via novel technologiessuch as nanotechnology, Micro-electromechanical systems (MEMs), meta-materials, flexible electronics, electrochromics, electroluminescence, etc. This paper will provide the reader with an overview of the Active Coatings Technologies Program, including an update of the on-going smart Coatings Materiel Program, its progress thus far, description of the prototype smart Coatingssystems and research tasks as well as future nanotechnology concepts, and applications for the Department of Defense.
A post-mortem tear down analysis was performed on the chromium-copper rails (alloy C18200) and alumina insulating sidewalls (AD-96) of the Cannon Caliber Electromagnetic Gun (CCEMG) after it had launched forty-nine al...
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A post-mortem tear down analysis was performed on the chromium-copper rails (alloy C18200) and alumina insulating sidewalls (AD-96) of the Cannon Caliber Electromagnetic Gun (CCEMG) after it had launched forty-nine aluminum alloy 7475 slu.s.or sabots with projectiles. The rails did not exhibit signs of gouging, however, a layer of aluminum from the armatures, approximately 13 microns thick, was deposited on them. The hardness and conductivity valu.s.of the rail material remained consistent along the length of the rails. The alumina sidewalls were cracked at the breech end of the gun from the start of the gun to a distance of 61 cm. Most of the cracks were due to the armatures cutting notches in the ceramic and exceeding the critical crack size of the material. Molten aluminum was found in the crackssuggesting that the cracks had formed in service and not due to the tear down procedure. Aluminum had deposited on and adhered to the alumina sidewalls as well as the rails. Despite sustaining some damage to the sidewalls and a buildup of aluminum on the rails and sidewalls the gun functioned until its decommissioning.
This is a technical historical chronicle of the past and on-going development of performance models for electro-optical sensors carried out by the u.s.army CECOM NVEsD, the original Night Vision Laboratory. The empha...
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ISBN:
(纸本)0819431753;9780819431752
This is a technical historical chronicle of the past and on-going development of performance models for electro-optical sensors carried out by the u.s.army CECOM NVEsD, the original Night Vision Laboratory. The emphasis has been on thermal imaging models and is also the focus of this paper. The origin of the Johnson criteria isshown and the resulting models that have evolved from the original concept proposed by John Johnson. The present formulations of the models are detailed and the newest developments are introduced. The force that drives the various improvements in the models is the development of more sophisticated thermal imagers whose performance must be described and predicted. Background supporting developments in laboratory measurements and field validation are indicated.
The average excitation level of anharmonic molecules in cw beams is determined as well as the distribution of excited states. The deactivation process consists of relaxation, diffusion, and convection. For low excitat...
The average excitation level of anharmonic molecules in cw beams is determined as well as the distribution of excited states. The deactivation process consists of relaxation, diffusion, and convection. For low excitation levels, a closed solution can be obtained for constant crosssection. For higher excitation levels, the variation of the crosssection has to be considered and numerical results are presented.
several techniqu.s.exist to evaluate the water vapor transport characteristics of clothing materials. The most common techniqu.s.include guarded hot plate sweating skin simulants and cup-type moisture vapor transmissi...
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several techniqu.s.exist to evaluate the water vapor transport characteristics of clothing materials. The most common techniqu.s.include guarded hot plate sweating skin simulants and cup-type moisture vapor transmission rate tests. Theoretically, all such tests measure an identical property, water vapor resistance, but the results from different test methods rarely agree. The reasons for the discrepancies are the different conditions present in each test: in some cases the intrinsic properties of the materials are altered by the test conditions. The results of three studies illustrate important factors to be considered when evaluating the thermal and moisture vapor transport properties of textile materials. Each study concentrates on one particular aspect of the problems encountered in measuring relative performance characteristics of these materials. The first study involves an experimental correlation between two kinds of water vapor permeability tests. The second study looks at the influence of air permeability on heat and water vapor transport through woven and nonwoven fabrics. The final study determines the agreement between three different guarded hot plate (sweating skin simulant) test facilities that differ mainly in the air velocity over the test samples.
Waterway maintenance plays an important role in efficiently transferring goods. The maintenance decisions, including dredging, depend on the sediment accumulation that is highly dependent on the shoaling rate. The sho...
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Waterway maintenance plays an important role in efficiently transferring goods. The maintenance decisions, including dredging, depend on the sediment accumulation that is highly dependent on the shoaling rate. The shoaling caused by tidal movement or channel characteristics can change the dredging depth. Therefore, a better understanding of shoaling rate distribution is a requirement to perform dredging more efficiently. Thisstudy proposes a wide range of statistical methods to analyze the model distribution of shoaling rates at reach and sub-reach levels along the Ohio River. The shoaling data is generated from the Corpsshoaling Analysis Tool (CsAT) developed by the usarmy Corps of Engineers. This paper investigates the distribution shape and degree of symmetry of distribution to specify the appropriate distribution model for the shoaling rate. It also measures the fitting performances. The resultsshow that the behavior of sub-reaches is different from that of the reach and depends on the location.
A new method has been developed to identify the isomers of amino acids by derivatization of the corresponding standards with 1-fluoro-2,4-dinitrophenyl-5-L-alanine amide (Marfey's reagent or FDAA) and analysis of ...
A new method has been developed to identify the isomers of amino acids by derivatization of the corresponding standards with 1-fluoro-2,4-dinitrophenyl-5-L-alanine amide (Marfey's reagent or FDAA) and analysis of the diastereomeric derivatives by a liquid chromatography-thermospray massspectrometry technique. Quantification of the FDAA derivatives that originate from standards was possible by using L-phenylalanine as the internal standard. The procedure was applied to determine the chiralities of the amino acids present in some previously uncharacterized blue-green algal peptides (microcystins).
作者：
LEHNIGK, sHResearch
Development and Engineering Center U.S. Army Missile Command Redstone Arsenal Alabama 35898‐5248
The log‐normal conditional density function is the delta function initial condition solution of a four‐parameter Fokker–Planck equation. It defines a diffusion process over the open first quadrant of the (x,t) plan...
The log‐normal conditional density function is the delta function initial condition solution of a four‐parameter Fokker–Planck equation. It defines a diffusion process over the open first quadrant of the (x,t) plane. This process reaches a nonzero steady state as t increases indefinitely if the drift parameter is positive. The process may be monotonic or by expansion and contraction (breathing). If the drift parameter is negative the process goes to zero by expansion and contraction towards x=0 as t increases indefinitely.
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