Block length effect on 5.0 Gbit/s real-time QPSK intradyne receivers with standard DFB laser

2007 ◽  
Vol 43 (20) ◽  
pp. 1106 ◽  
Author(s):  
N. Kaneda ◽  
A. Leven ◽  
Y.-K. Chen
Keyword(s):  
Real Time ◽  
Block Length ◽  
Length Effect ◽  
Dfb Laser

The Effects of Block Duration and Task Demands on the Experience of Task Unrelated Thought

2002 ◽  
Vol 22 (1) ◽  
pp. 13-31 ◽  
Author(s):  
Jonathan Smallwood ◽  
Marc Obonsawin ◽  
Helga Reid
Keyword(s):  
Vigilance Task ◽  
Task Demands ◽  
Block Length ◽  
Conscious Awareness ◽  
Length Effect ◽  
Controlled Processing ◽  
Task Irrelevant ◽  
The Relationship ◽  
Fluency Task ◽  
And Task

Evidence indicates that the degree to which attention can be maintained upon the task in hand depends upon both the type and duration of the task. Two experiments investigated the relationship between task irrelevant thinking and block duration in two types of task. In Experiment One, a vigilance task was compared to a fluency task and in Experiment Two a verbal encoding task was compared to a fluency task. In both tasks we investigated the hypothesis that block duration mediated changes in thinking would be smallest for tasks which rely heavily on controlled processing (the fluency task). Results were consistent with expectations and indicated that the report of thoughts with no relationship to the task in hand increased with block duration in the vigilance task (Experiment One) and the verbal encoding task (Experiment Two). In neither experiment did block length effect thinking during the fluency task. These results are broadly consistent with the assertion that tasks that cannot be readily automated, maintain attention upon the task at hand in a superior fashion as the duration of the block increases. The implications of these results for our understanding of the process responsible for our conscious awareness of a stimulus and our ability to plan and anticipate events are discussed.

scholarly journals Calibration-Free WMS Using a cw-DFB-QCL, a VCSEL, and an Edge-Emitting DFB Laser With In-Situ Real-Time Laser Parameter Characterization

2017 ◽  
Vol 9 (2) ◽  
pp. 1-17 ◽  
Author(s):  
Abhishek Upadhyay ◽  
David Wilson ◽  
Michael Lengden ◽  
Arup L. Chakraborty ◽  
George Stewart ◽  
...  
Keyword(s):  
Real Time ◽  
Laser Parameter ◽  
Dfb Laser ◽  
Calibration Free

Some Recent Results in Quiescent Prominence Spectrometry

1979 ◽  
Vol 44 ◽  
pp. 41-47
Author(s):  
Donald A. Landman
Keyword(s):  
Real Time ◽  
Computer System ◽  
Spectral Response ◽  
Absolute Intensity ◽  
Solar Observatory ◽  
Target Size ◽  
Small Target ◽  
Signal Averaging ◽  
Quiescent Prominence

This paper describes some recent results of our quiescent prominence spectrometry program at the Mees Solar Observatory on Haleakala. The observations were made with the 25 cm coronagraph/coudé spectrograph system using a silicon vidicon detector. This detector consists of 500 contiguous channels covering approximately 6 or 80 Å, depending on the grating used. The instrument is interfaced to the Observatory’s PDP 11/45 computer system, and has the important advantages of wide spectral response, linearity and signal-averaging with real-time display. Its principal drawback is the relatively small target size. For the present work, the aperture was about 3″ × 5″. Absolute intensity calibrations were made by measuring quiet regions near sun center.

Video real-time imaging of artificial membranes during freeze-drying by cryo-electron microscopy

1988 ◽  
Vol 46 ◽  
pp. 16-17
Author(s):  
Alan S. Rudolph ◽  
Ronald R. Price
Keyword(s):  
Real Time ◽  
Self Assembly ◽  
Freeze Drying ◽  
Video Capture ◽  
Drying Process ◽  
Artificial Membranes ◽  
The Past ◽  
Cryo Electron Microscopy ◽  
Spherical Structures ◽  
Capture Techniques

We have employed cryoelectron microscopy to visualize events that occur during the freeze-drying of artificial membranes by employing real time video capture techniques. Artificial membranes or liposomes which are spherical structures within internal aqueous space are stabilized by water which provides the driving force for spontaneous self-assembly of these structures. Previous assays of damage to these structures which are induced by freeze drying reveal that the two principal deleterious events that occur are 1) fusion of liposomes and 2) leakage of contents trapped within the liposome [1]. In the past the only way to access these events was to examine the liposomes following the dehydration event. This technique allows the event to be monitored in real time as the liposomes destabilize and as water is sublimed at cryo temperatures in the vacuum of the microscope. The method by which liposomes are compromised by freeze-drying are largely unknown. This technique has shown that cryo-protectants such as glycerol and carbohydrates are able to maintain liposomal structure throughout the drying process.

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