Award Data

Additive Manufacturing (AM), where three-dimensional (3D) objects are created from a digital model by depositing and fusing successive layers of material, provides the ability to produce low-volume, customized products with complex geometries relatively quickly at a moderate cost. However, AM processes sometimes fail to produce acceptable parts, due to either geometric in- accuracy (e.g., shrinkag ...

In this phase-I proposal, the effect of terrestrial cosmic rays on the failure rate of commercial 1200V SiC power MOSFETs will be studied. The goal of the study is to quantify the appropriate breakdown voltage de-rating needed for SiC MOSFETs subject to cosmic rays. The failure rate of SiC power MOSFETs as a function of the reverse blocking voltage will be determined and compared to failure rate o ...

ABSTRACT: The innovation proposed is a computationally-tractable, physics-based, portable turbulent combustion modeling strategy for application to a wide range of Air Force aero-propulsive systems, including augmentors, liquid rockets and scramjets. This modeling strategy will be implemented within an Application Programming Interface (API) library suitable for easy integration within Air Force ...

ABSTRACT: Due to scarcity of spectrum, Dynamic Spectrum Access (DSA) becomes a needed technology to improve the utilization of electromagnetic spectrum for DoD satellite communication. However, current DSA approaches are developed for terrestrial communications without addressing the unique challenges for SATCOM environments such as error-prone spectrum sensing, high mobility, and large coverage. ...

ABSTRACT: Most cross-domain information flows require some human intervention to ensure that the requirements for releasability are met. Such intervention is expensive and slow, and can form a bottleneck in operations. Unfortunately, fully automated sharing of information across security domain boundaries is also fraught with difficulties due to problems with identifying releasable information, a ...

ABSTRACT: Coordinating and sharing information across multi-level security (MLS) networks are of great interest in many military applications. However, it is very challenging to accomplish those goals due to the heterogeneous security classifications of different network domains. The recent proposed cross-domain solutions (CDS) provide initial steps to make such applications possible. However, th ...

ABSTRACT: UltraHiNet, LLC (UHN) proposes to develop a prototype next generation tracking architecture which exploits wide area motion imagery (WAMI) systems and leverages projected heterogeneous high performance computing (HPC) architectures for on-board and ground-based processing of vehicle and dismount targets for urban surveillance. Our research team will focus on the following goals: 1. Dev ...

ABSTRACT: This project addresses the need for high-efficiency broad-spectrum PV cells. The proposed original PV design is based on quantum dots with built-in charge (Q-BIC), where the dot charging is realized by selective doping of dot medium. The preliminary data demonstrate that the charged dots placed in a single p-n-junction strongly enhance harvesting and conversion of sub-bandgap photons an ...

ABSTRACT: Information systems continue to progress in terms of collecting, characterizing and assessing information. While this evolution has provided unprecedented intelligence capability to the U.S. and our allies, it has also raised unique challenges in the area of information security and disclosure risks. In particular, the intelligence community (IC) currently lacks the ability to understan ...

ABSTRACT: The ability to obtain time-resolved, direct wall shear stress measurement is an important asset to aerodynamic research, flow control and to enhance the fundamental understanding of the turbulent boundary layer. Due to a lack of reliable and affordable skin friction sensors, existing indirect methods are used to measure wall shear stress but their usefulness is limited since prior kno ...