ASD pioneered the science of field spectroscopy over 25 years ago and continues to lead the industry with the world's most trusted field-portable UV/Vis/NIR/SWIR spectroradiometers covering the full solar reflected spectrum. The ASD FieldSpec 4 line of full-range spectroradiometers delivers the fastest and most accurate spectral field measurements available from any commercial field-portable spectroradiometer. Continued enhancements to core instrument spectrometers and other critical components have dramatically improved overall performance, signal, and integration speeds compared to earlier models. ASD FieldSpec 4 spectroradiometers are designed specifically around the challenges researchers face when collecting spectral measurements in the field. Which ASD FieldSpec spectroradiometer model is best suited for my application?

All ASD FieldSpec spectroradiometers provide 3 nm spectral resolution in the VNIR (350 nm – 1000 nm) range. Four spectral resolution options are available for the SWIR (1001 nm – 2500 nm) range: 6 nm enhanced SWIR spectral resolution to support the next generation of multi and hyperspectral airborne sensors. 8 nm SWIR spectral resolution for accommodating geological studies and atmospheric research. 10 nm SWIR resolution is well suited to characterize spectral resolutions of 10 nm to 50 nm to cover the technical requirements of most field researchers. 30 nm SWIR resolution offers a cost effective solution and is ideal for applications characterized by broad spectral features, like vegetation analysis. Cms lite dvr software download. The ASD FieldSpec 4 leaves the factory floor capable of collecting reflectance, transmittance and absorption measurements.

ASD FieldSpec instruments can also be calibrated as a spectroradiometer, for precise radiance and irradiance measurements. A wide variety of accessories are available to provide accurate contact or stand-off spectrum collection for any kind of analysis needs. In order to better accommodate the variability of spectral reflectance characteristics of different materials, the ASD FieldSpec 4 is also available in visible near infrared models (VNIR-only; 325-1075 nm) as an ultra-portable hand-held: Low cost, easy to use, versatile and durable for accurate analysis. Offers greater sensitivity and faster collection rates over the standard HandHeld 2.

Autism spectrum disorder (ASD) is a developmental disorder that affects communication and behavior. Although autism can be diagnosed at any age, it is said to be a “developmental disorder” because symptoms generally appear in the first two years of life.

Duncan, Cynthia J.; Fenves, Steven J.; Iwankiw, Nestor (2006). 'Technical Note: Determination of Allowable Strength Design Safety Factors in the 2005 AISC Specification,' Engineering Journal, American Institute of Steel Construction, Vol.

The 2005 AISC Specification for Structural Steel Buildings includes both allowable stress design (ASD) and load and resistance factor design (LRFD) methods. The determination of safety factors for use in ASD are directly proportional to the resistance factors used for LRFD. The relationship between the resistance and phi factors is derived based on a live load-to-dead load ratio of 3 and the development of an equivalent load factor for LRFD. Both the resistance and phi factors are tabulated in this paper for the various limit states and structural elements that appear throughout the 2005 AISC Specification.