A Characterization of the Diffuse Galactic Emissions in the Anticenter of the Galaxy

Using the Archeops and WMAP data, we perform a study of the anticenter Galactic diffuse emissions—thermal dust, synchrotron, free-free, and anomalous emissions—at degree scales. The high-frequency data are used to infer the thermal dust electromagnetic spectrum and spatial distribution allowing us to precisely subtract this component at lower frequencies. After subtraction of the thermal dust component, a mixture of standard synchrotron and free-free emissions does not account for the residuals at these low frequencies. Including the all-sky 408 MHz Haslam data we find evidence for anomalous emission with a spectral index of −2.5 in units. However, we are not able to provide coclusion regarding the nature of this anomalous emission in this region. For this purpose, data between 408 MHz and 20 GHz covering the same sky region are needed.

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GPS collars are more efficient when collecting high-frequency data

Australian Mammalogy ◽

10.1071/am15034 ◽

2016 ◽

Vol 38 (2) ◽

pp. 237 ◽

Cited By ~ 3

Author(s):

H. W. McGregor ◽

S. M. Legge ◽

M. E. Jones ◽

C. N. Johnson

Keyword(s):

High Frequency ◽

Pivotal Role ◽

High Frequency Data ◽

Frequency Data ◽

Low Frequencies ◽

High Frequencies ◽

Gps Collars

Selecting an appropriate fix schedule has a pivotal role when using GPS collars. On the basis of deployments of GPS collars on 35 cats, we report on an often overlooked consideration: that GPS units are more efficient collecting data at high frequencies (15 min between fixes in this study) than low frequencies (>2 h between fixes).

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Shake, Rattle, and Roll

Mechanical Engineering ◽

10.1115/1.2001-nov-2 ◽

2001 ◽

Vol 123 (11) ◽

pp. 56-58

Author(s):

John DeGaspari

Keyword(s):

High Frequency ◽

Low Frequency ◽

High Frequency Data ◽

Frequency Data ◽

Low Frequencies ◽

Mems Accelerometer ◽

Running Shoes ◽

Low Costs ◽

New Applications ◽

Thin Reservoir

This article highlights that airbag has been a boon to MEMS business. Sales of the tiny accelerometers that sense when the bags should deploy have helped to drive down prices significantly since the devices were first implemented. Now, the high volumes, low costs, and dependable performance of micro devices are opening the way to new applications. Sneaker companies are looking at MEMS accelerometers in running shoes to act as speedometers of sorts. Advantage of the MEMS accelerometer is that it has a wide bandwidth, capable of reading high as well as low frequencies. High-frequency data provides information about thin reservoir zones, faults, and changes that are taking place as fluids are being drained from pores in the rock, said Denver. Higher frequency signals are critical to accurate interpretation. Low-frequency signals are useful in identifying the type of rock, be it sandstone, shale, or carbonate, for example. The VectorSeis is as rugged as a conventional geophone and can be successfully deployed in down-hole environments to get a closer reading of a reservoir.

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