Future hypersonic vehicles are likely to use sharp leading edges on wings and engine inlets to reduce drag. The radius of curvature associated with such structures may be one centimeter or less. The very small size leads to high heating rates that can be accommodated using advanced materials. An additional aspect of the small size concerns the basic gas dynamics. At such small scales, the conti...

The widefield diamond nitrogen-vacancy (NV) microscope is a powerful instrument for imaging magnetic fields. However, key limitation impeding its wider adoption complex operation, in part due to the difficulty of precisely interfacing sensor and sample achieve optimum spatial resolution. Here, we demonstrate solution this problem that practical reliably minimizes NV-sample standoff. We built co...

Cavitation jet drilling has been extensively employed for the exploitation of geo-energy resources. The dynamics cavitation bubbles in close proximity to solid boundary have a subject great interest during drilling, as they play crucial role determining performance. In present work, single bubble near surface is numerically investigated by using axisymmetric Navier-Stokes equations and volume f...

abstract in the recent decades, the iranian economy has been highly depended on oil revenues. considering the fact that a great part of non-oil exports are agricultures product, studying factors influencing growth of agricultural sector plays an important role in the iran's economy. supply domestic shocks and domestic demand pressure along with deviation of exchange rates from its equilibrium, ...

The paper discusses two topics: firstly an approach of using multiple layers of annotation is sketched out. Regarding the XML representation this approach is similar to standoff annotation. A second topic is the use of heterogeneous linguistic resources (e.g., XML annotated documents, taggers, lexical nets) as a source for semiautomatic multi-dimensional markup to resolve typical linguistic iss...

Given the contemporary trend to modular NLP architectures and multiple annotation frameworks, the existence of concurrent tokenizations of the same text represents a pervasive problem in everyday’s NLP practice and poses a non-trivial theoretical problem to the integration of linguistic annotations and their interpretability in general. This paper describes a solution for integrating different ...

This paper describes the mitigation of shaped charge penetration of steel armour by the use of spaced metallic and composite plates. The target consisted of one or more steel plates of 10mm thickness some of which were backed by 25mm E-glass polyester composite panels at various additional spacings from the rearmost steel plate. A 32mm diameter shaped charge warhead was detonated at a standoff ...

This paper describes currently developed chemical and thermal landmine neutralization methods under the DoD Humanitarian Demining Research and Development (HD R&D) Program. It includes a table showing the differences among current detonation or demolition techniques, and among chemical and thermal systems. Comparative elements include the neutralization mechanism; neutralization effects; time r...