185,069 research outputs found
Interior of Acme Sucker Rod Company
No full textA copy of a black and white photograph of the room "where the J & H straight line jacks are put up" in the Acme Sucker Rod Factory in Toledo, Ohio. The photo was taken from page 21 of a pamphlet done by the company entitled "The Fine Art of Producing Petroleum" published around 1900. The Acme Sucker Rod Company was founded by Toledo Mayor Samuel M. "Golden Rule" Jones
The optimal synapse for sparse, binary signals in the rod pathway:Neural Computation
No full textThe sparsity of photons at very low light levels necessitates a nonlinear synaptic transfer function between the rod photoreceptors and the rod-bipolar cells. We examine different ways to characterize the performance of the pathway: the error rate, two variants of the mutual information, and the signal-to-noise ratio. Simulation of the pathway shows that these approaches yield substantially different performance at very low light levels and that maximizing the signal-to-noise ratio yields the best performance when judged from simulated images. The results are compared to recent data.</p
Modelling Rod-like Flexible Biological Tissues for Medical Training
No full textThis paper outlines a framework for the modelling of slender rod-like biological tissue structures in both global and local scales. Volumetric discretization of a rod-like structure is expensive in computation and therefore
is not ideal for applications where real-time performance is essential. In our approach, the Cosserat rod model is introduced to capture the global shape changes, which models the structure as a one-dimensional entity, while the
local deformation is handled separately. In this way a good balance in accuracy and efficiency is achieved. These advantages make our method appropriate for
the modelling of soft tissues for medical training applications
From line to dots: an improved computerised rod and frame system for testing subjective visual vertical and horizontal
No full textBackground Perception of subjective visual vertical (SVV) and horizontal (SVH) has traditionally been measured by rotating a mechanical rod either with or without a frame present. The computerised rod and frame (CRAF) system has previously only been used to measure SVV. We have expanded the use of this system by testing its feasibility to measure SVH. This was done by comparing two groups of subjects (n = 103) randomly assigned to be tested for SVV or SVH. Findings Preliminary results showed a higher than expected percentage of individuals with SVH errors < 0.5°. This was attributed to additional visual cues provided by the changing appearance of the rod as it approached the horizontal. A solution to this problem was sought by replacing the rod by two dots to mark its ends. In a second investigation 30 subjects were tested using both the "rod as line" and "rod as dots" presentation. Bland and Altman analysis showed no difference between the rod and dots presentations in the measurement of SVV, but confirmed a fixed error of -0.93° between rods and dots for SVH. Changing the rod from a line to dots in the computer system resulted in errors for both SVV and SVH that were comparable to previous studies using manual systems. Conclusions The computerized rod and frame system may be improved by replacement of the line with two dots. This reduces clues provided to the subject by the appearance of the rod on the screen
Rod Korns
No full textPhoto showing J. Roderic ("Rod") Korns, a historian of western trails and author of "West from Fort Bridger
Jarrod Tanner / JRod oral history interview, 2013
No full textJarrod "J-Rod" Tanner oral history interview conducted by Kevin Kosanovich on March 11, 2013. Jarrod "J-Rod" Tanner is a radio DJ on WNSB, Hot 91.1 FM. Topics include: Bronx vs. Virginia; Lex Luger; Juicy J; Filipino influence on bboys in Virginia Beach; JROD Brand; economics of Virginia hip-hop; college radio stations
[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
[Report to Chief J. E. Curry, by an unknown author #2]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
Rod contributions to color perception: Linear with rod contrast
No full textAbstractAt mesopic light levels, an incremental change in rod activation causes changes in color appearance. In this study, we investigated how rod mediated changes in color perception varied as a function of the magnitude of the rod contrast. Rod-mediated changes in color appearance were assessed by matching them with cone-mediated color changes. A two-channel four-primary colorimeter allowed independent control of the rods and each of the L-, M- and S-cone photoreceptor types. At all light levels, rod contributions to inferred PC, KC and MC pathway mediated vision were linearly related to the rod incremental contrast. This linear relationship could be described by a model based on primate ganglion cell responses with the assumption that rod signals were conveyed via rod–cone gap junctions at mesopic light levels
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