1,854,570 research outputs found
Interior of Acme Sucker Rod Company
No full textA copy of a black and white photograph of the interior of the Acme Sucker Rod Factory in Toledo, Ohio entitled "where the Acme sucker rods are made" The photo was taken from page 5 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
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
Stock room inside the Acme Sucker Rod Company
No full textA copy of a black and white photograph of the interior of the Acme Sucker Rod Factory in Toledo, Ohio entitled "the stock room" The photo was taken from page 23 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
Tool room inside the Acme Sucker Rod Company
No full textA copy of a black and white photograph of the interior of the Acme Sucker Rod Factory in Toledo, Ohio entitled "a corner in the tool room" The photo was taken from page 19 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
Noise removal at the rod synapse of mammalian retina
No full textMammalian rods respond to single photons with a hyperpolarization of about 1 mV which is accompanied by continuous noise. Since the mammalian rod bipolar cell collects signals from 20–100 rods, the noise from the converging rods would overwhelm the single-photon signal from one rod at scotopic intensities (starlight) if the bipolar cell summed signals linearly (Baylor et al., 1984). However, it is known that at scotopic intensities the retina preserves single-photon responses (Barlow et al., 1971; Mastronarde, 1983). To explore noise summation in the rod bipolar pathway, we simulated an array of rods synaptically connected to a rod bipolar cell using a compartmental model. The performance of the circuit was evaluated with a discriminator measuring errors in photon detection as false positives and false negatives, which were compared to physiologically and psychophysically measured error rates. When only one rod was connected to the rod bipolar, a Poisson rate of 80 vesicles0s was necessary for reliable transmission of the single-photon signal. When 25 rods converged through a linear synapse the noise caused an unacceptably high false positive rate, even when either dark continuous noise or synaptic noise where completely removed. We propose that a threshold nonlinearity is provided by the mGluR6 receptor in the rod bipolar dendrite (Shiells & Falk, 1994) to yield a synapse with a noise removing mechanism. With the threshold nonlinearity the synapse removed most of the noise. These results suggest that a threshold provided by the mGluR6 receptor in the rod bipolar cell is necessary for proper functioning of the retina at scotopic intensities and that the metabotropic domains in the rod bipolar are distinct. Such a nonlinear threshold could also reduce synaptic noise for cortical circuits in which sparse signals converge. <br/
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
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
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
Rod Taylor interview, undated
No full textRod Taylor interview presents an interview with singer and songwriter Rod Taylor about his new record and book of poetry. The program contains a conversation with Taylor, samples of poetry from his book, and performances of his music undated
The best of Rod Stewart
No full text1.Maggie may /Rod Stewart +2.You wear it well /Rod Stewart +3.Baby Jane /Rod Stewart - Tom Down +4.Da ya think I'm sexy? /Tom Down +5.I was only joking /Tom Dowd +6.This old heart of mine /Bernard Edwards - Trevol Horn +7.Sailing /Tom Down +8.I don't want to talk about it /Tom Down +9.You're in my heart /Tom Down +10.Young turks /Rod Stewart +11.What am I gonna do (I'm so in love with you) /Rod Stevart - Jimmy Lovine, Tom Dowd +12.The first cut is the deepest /Tom Down +13.The killing of Georgie /Tom Dowd +14.Tonight's the night /Tom Down +15.Every beat of my heart /Bob Ezrin +16.Downtown train /Trevor Hor
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