scholarly journals Making the Grade Choosing the Right CCD Camera Chip Grade

1999 ◽  
Vol 7 (2) ◽  
pp. 30-31
Author(s):  
Ted Inoue
Keyword(s):  
Dynamic Range ◽  
Fluorescent Microscopy ◽  
Ccd Camera ◽  
Low Noise ◽  
Image Deconvolution ◽  
Microscopy Imaging ◽  
Performance Specifications ◽  
Ratio Imaging ◽  
And Performance ◽  
The Right

Today, charge coupled devices (CCDs) have become the de-facto standard for scientific imaging, In fact, their potential for high resolution, sensitivity, wide dynamic range and low noise has made them the device of choice for most fluorescent microscopy imaging applications, This is especially true for quantitative microscopy applications such as ratio imaging, fluorescent in-situ hybridization and image deconvolution.However, choosing the most appropriate CCD camera for each application can be quite challenging given the broad range of features and performance specifications. This month's article focuses on a single characteristic of the CCD: the chip grade.

scholarly journals The 1.3mm Full-Stokes Polarization System at CARMA

2015 ◽  
Vol 04 (01n02) ◽  
pp. 1550005 ◽  
Author(s):  
Charles L. H. Hull ◽  
Richard L. Plambeck
Keyword(s):  
Dynamic Range ◽  
Signal To Noise Ratio ◽  
Position Angle ◽  
Low Noise ◽  
Low Noise Amplifiers ◽  
Beam Polarization ◽  
Circular Polarizer ◽  
Angle Measurements ◽  
Millimeter Wavelengths ◽  
And Performance

The CARMA 1.3[Formula: see text]mm polarization system consists of dual-polarization receivers that are sensitive to right- (R) and left-circular (L) polarization, and a spectral-line correlator that measures all four cross polarizations ([Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text]) on each of the 105 baselines connecting the 15 telescopes. Each receiver comprises a single feed horn, a waveguide circular polarizer, an orthomode transducer (OMT), two heterodyne mixers, and two low-noise amplifiers (LNAs), all mounted in a cryogenically cooled dewar. Here we review the basics of polarization observations, describe the construction and performance of key receiver components (circular polarizer, OMT, and mixers — but not the correlator), and discuss in detail the calibration of the system, particularly the calibration of the R–L phase offsets and the polarization leakage corrections. The absolute accuracy of polarization position angle measurements was checked by mapping the radial polarization pattern across the disk of Mars. Transferring the Mars calibration to the well-known polarization calibrator 3C286, we find a polarization position angle of [Formula: see text] for 3C286 at 225[Formula: see text]GHz, consistent with other observations at millimeter wavelengths. Finally, we consider what limitations in accuracy are expected due to the signal-to-noise ratio, dynamic range, and primary beam polarization.

THE SPECIFICATION AND TESTING OF A SEISMIC‐REFRACTION SYSTEM FOR CRUSTAL STUDIES

Geophysics ◽  
1961 ◽  
Vol 26 (6) ◽  
pp. 820-824 ◽  
Author(s):  
R. E. Warrick ◽  
D. B. Hoover ◽  
W. H. Jackson ◽  
L. C. Pakiser ◽  
J. C. Roller
Keyword(s):  
Frequency Response ◽  
Seismic Noise ◽  
Dynamic Range ◽  
Seismic Refraction ◽  
Field Tests ◽  
High Dynamic Range ◽  
High Gain ◽  
Low Noise ◽  
Performance Specifications ◽  
High Dynamic

A new seismic‐refraction system built for the U. S. Geological Survey for crustal studies has been tested in the laboratory and shown to meet strict performance specifications for broad frequency response, low noise, high gain, and high dynamic range. The inherent advantages of magnetic recording, with selective filtering on playback, were demonstrated in field tests by the recovery of weak events that otherwise would be obscured by high seismic noise.

scholarly journals The Adaptive Gain Integrating Pixel Detector at the European XFEL

2019 ◽  
Vol 26 (1) ◽  
pp. 74-82 ◽  
Author(s):  
Aschkan Allahgholi ◽  
Julian Becker ◽  
Annette Delfs ◽  
Roberto Dinapoli ◽  
Peter Goettlicher ◽  
...  
Keyword(s):  
Dynamic Range ◽  
Low Noise ◽  
Frame Rate ◽  
Single Photons ◽  
Pixel Detector ◽  
Performance Parameters ◽  
Single Particles ◽  
X Ray ◽  
Experimental Station ◽  
And Performance

The Adaptive Gain Integrating Pixel Detector (AGIPD) is an X-ray imager, custom designed for the European X-ray Free-Electron Laser (XFEL). It is a fast, low-noise integrating detector, with an adaptive gain amplifier per pixel. This has an equivalent noise of less than 1 keV when detecting single photons and, when switched into another gain state, a dynamic range of more than 104 photons of 12 keV. In burst mode the system is able to store 352 images while running at up to 6.5 MHz, which is compatible with the 4.5 MHz frame rate at the European XFEL. The AGIPD system was installed and commissioned in August 2017, and successfully used for the first experiments at the Single Particles, Clusters and Biomolecules (SPB) experimental station at the European XFEL since September 2017. This paper describes the principal components and performance parameters of the system.

Rancangan Sistem Pengukuran Kinerja Berbasis Human Resource Scorecard Pada Universitas Muhammadiyah Luwuk

2020 ◽  
Vol 10 (1) ◽  
pp. 63-71
Author(s):  
Nurhaeda Abbas ◽  
Anggraini Sukmawati ◽  
Muhammad Syamsun
Keyword(s):  
Performance Measurement ◽  
Human Resource ◽  
Performance Measurement System ◽  
Group Discussions ◽  
Strategic Objectives ◽  
Depth Interview ◽  
And Performance ◽  
The Right ◽  
Hierarchy Process ◽  
The Relationship

Today the performance measurement of Muhammadiyah Luwuk uUniversity’s performance has not formulated yet based on University’s vision and mission. It will affect the strategic steps needed and performance improvement efforts in the future.  Human resource scorecard is the right system to be applied in Muhammadiyah Luwuk University. The purpose of this study is to designed a performance measurement system at Muhammadiyah Luwuk University using the Human Resource Scorecard with four perspectives: stakeholder, academic management and kemuhammadiyaan, operational and innovation, as well as and learning. Data was analyzed by analytical hierarchy process method. This research was conducted by distributing questionnaires, focus group discussions and in-depth interview with stakeholders at Muhammadiyah Luwuk University. The results showed that there were 14 strategic objectives and 33 key performance indicators to be achieved by the priority objectives, which are: empowerment and development of faculty, increased administrative process quality, improved sound budget performance and, improvement of the relationship with stakeholders.

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