Thomas Cuff

Thomas Cuff
Frederick Community College · Computer & Information Science

Master of Engineering

About

86
Publications
57,028
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3
Citations
Citations since 2016
51 Research Items
3 Citations
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Introduction
Hello, I am currently working on a technical history of limelight, the Nernst glower/lamp (glow rod), and the gas mantle (Welsbach mantle or Auer mantle). I am editing material from my aborted dissertation for this work and I hope to be done in 2 or 3 years. I will post this on ResearchGate. These three light sources, like the coherer radio detector, are pretty much forgotten technologies whose elucidation is still wanting. As the song goes: "Everything old is new again." Regards, Tom Cuff
Additional affiliations
August 2013 - November 2013
Insight Global
Position
  • Field Engineer
Description
  • Worked as a contractor performing configuration of Power Management instrumentation for Schneider Electric (owner of SquareD, APC, Modicon, etc.) in the Baltimore-Washington area at locations such as data centers, depots, and office buildings.
October 2011 - May 2012
ACS, Inc. a Xerox Company
Position
  • Engineer
Description
  • Worked as a system integrator for speed camera systems and red light camera systems. Performed field installations and troubleshooting. Tested both wireless (4G LTE) and wired networks for stability and connectivity.
February 2006 - June 2011
Parson Infrastructure & Technology
Position
  • Supervisory Engineer
Description
  • Worked as a contractor to DHS/DNDO tasked with defining and evaluating CAARS . Member of the ANSI N43.14 subcommittee, and contributor to the ANSI N42.41 Standard via communications with its subcommittee chairman.
Education
January 2000 - August 2014
Frederick Community College
Field of study
  • Computer Science
January 1990 - August 1993
Temple University
Field of study
  • Electrical Engineering
January 1985 - June 1988
Drexel University
Field of study
  • Mathematics

Publications

Publications (86)
Research
Full-text available
This is the 1993 thesis entitled "Coherers, a review" by Thomas Mark Cuff. The printed version of this document can be found in the main library at Temple University; a second printed copy is held in Temple's Electrical Engineering Department. The page count of the electronic version of this document is different from that of the printed version du...
Research
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The technical history of the copper oxide rectifier is usually incomplete because it does not discuss the use of Chilean copper in the manufacture of these devices. The best copper oxide rectifiers were made using Chilean copper. This document discusses what is known about the use of Chilean copper in this application.
Research
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Most, if not all, histories of the discovery of quantum mechanical tunneling, do not give credit for its discovery to the person who should have received the credit: Robert Francis Earhart. In 1901, Earhart published experimental results of work he had done on the phenomenon of electrical conduction at very small electrode spacing in a gas. J. J. T...
Research
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The Beilby layer is the amorphous or disordered layer created on the surface of some metals and nonmetals as a result of polishing, burnishing, etc. Both the history of this concept from the observations and interpretations of George Thomas Beilby and the still earlier observations by, for example, Erskine-Murray, who showed that mechanical working...
Method
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This derivation attempts to understand a proposed method for measuring the precision of the vertical (elevation) angle readings of theodolites and total stations as presented in the ISO 12857-2 (1997) Standard/Norm. The method was originally proposed by Prof. Dr. Rolf Gelhaus. At the time, most theodolite and/or total station manufacturers only mea...
Method
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This Method is a set of derivations related to the impulse testing of a piezoelectric shock sensor. There are three ways of mechanically testing such sensors: 1) sinusoidal excitation, 2) impulse excitation, and 3) random noise excitation. As explained in this Method, impulse excitation has many practical advantages. The sensor is approximated by a...
Presentation
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In the 1980s, two groups, one in France (Teissé et al.) and one in Japan (Sakurai et al.) observed increased lateral proton conduction along monolayers formed from well characterized phosphlipids (PL). Both groups concluded that the interfacial layer of water directly below the hydrophillic heads of the PL was the reason because, they reasoned, tha...
Method
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This document is a corrected, revised, and expanded version of an earlier RG document: https://www.researchgate.net/publication/334233647_Computer_Memories_A_History_Revision_2. At 68 pages, this is a substantial increase in the size of the original document, which was only 23 pages. I was so surprised at how many people viewed my original document...
Method
Full-text available
This is an electronic schematic diagram of the 2nd laser simulator, which I designed to produce ersatz laser ranging return pulses sitting on top of an optical noise floor. The output of this simulator was used to test the receiver front end of a SLR (Satellite Laser Ranging) transceiver. The difference between the 2nd and 1st laser simulator is th...
Research
Full-text available
Investigate the significance of the antiresonant point in the transfer function of the coupled system of second order differential equations representing a DC , permanent magnet, electric motor driving a load by way of a compliant shaft. Also investigate the validity of the "Acceleration Stabilization" scheme proposed in Richard H. Welch, Jr.'s "Tu...
Data
This zipped folder contains six files: 1) InitialLvlModel.m [A Matlab script that uses SMT (Symbolic Math Toolbox) to solve a 1-D heat conduction problem.] 2) InitialLvlModel.mdl [A Simulink model that solves the same1-D heat conduction problem solved by InitialLvlModel.m.].] 3) InputTxtFile.m [A Matlab script used to import data from the file Temp...
Method
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This document explains how to setup the Simulink models TopLvlModel.mdl and TopLvlWConv.mdl so that they make use of the data contained in the file Temperaturemeasurement.txt as an input to the aforementioned Simulink models.
Method
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This a series of derivations for a 1-D heat conduction problem wherein the homogeneous, linear PDE (Partial Differential Equation) has its spatial portion discretized. This procedure changes the original PDE into a series of linear ODE's (Ordinary Differential Equations) in terms of the temporal variable. These coupled (simultaneous) ODE's can then...
Method
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This method gives a complete derivation of Gibbs phemonenon for both a periodic square wave and an aperiodic rectangular pulse.
Method
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Hello All, This document examines the concept of forced binary choice as applied to automatic LS NII (Large Scale Non-Intrusive Inspection) systems used to decide, based on an algorithm inspection of a cargo container radiograph, whether a cargo container at a port of entry contains contraband. I have taken the approach used by Donald G. Morrison...
Method
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Hello All, This document is an extension of Part 1 in the sense that it discusses some of the same things, but it does so in a visual way using a Venn diagram to display the space: TP (True Positive), TN (True Negative), FP (False Positive), and FN (False Negative). The question of how one goes about selecting a method to determine the confidence...
Method
Full-text available
In this document, we will be looking at the use of conditional probabilities, a priori and a posteriori probabilities, contingency tables used with ROC (Relative/Receiver Operating Characteristic) analysis, and Bayes’ theorem. We will apply these concepts not to the system for which they were originally intended, radio receivers using noisy communi...
Method
Full-text available
This is a complete derivation showing the mathematics behind a thermal conductivity comparator.
Research
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The history and mechanisms behind illumination by light sources utilizing incandescent metal oxides such as limelight, the Welsbach mantle (gas mantle, Auer light, Auer mantle), and the Nernst glower (Nernst lamp) are obscure even today. The same thing is true of the auxiliary technologies associated with these same light sources: the hydrogen-oxyg...
Research
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This document reviews the history of digital computers memories up to and including core memory. The exclusion of the pioneering work on memory cores and core memory by An Wang and Jay Forrester, respectively, by some reference books and papers is also discussed. NOTE, there is a new and improved version of this document on RG: https://www.research...
Research
Full-text available
This document is a corrected, revised, and extended version of "Appendix A - MOM Devices" from my 1993 Thesis submitted to Temple University. This is the first revision, Revision 1, and other revisions will follow. Each revision will contain a change bar in the left-hand margin so that anyone who has read the previous version can easily see what ha...
Research
Full-text available
This document is a corrected, revised, and slightly extended version of "Appendix F - Vacuum Arc, Spark or Discharge" from my 1993 Thesis submitted to Temple University. This is the first revision, Revision 1, and other revisions will follow. Each revision will contain a change bar in the left-hand margin so that anyone who has read the previous ve...
Chapter
Starting from historical research, this work aims first to recall the origin of arc plasma science and one of its most important applications: Wireless Telegraphy. At the beginning of the twentieth century, William du Bois Duddell discovered by chance that the “singing arc”, a carbon arc lamp, was able to generate the propagation of electromagnetic...
Data
Full-text available
English language translation by Thomas Cuff of the French language article: H. Pélabon; Sur la détection et la stabilité de certains détecteurs. [On rectification and the stability of certain detectors.]; Comptes Rendus Hebdomadaries des Séances de l’Académie des Sciences (Paris); Vol. 182; January 11, 1926; pp. 124-125.
Data
Full-text available
English language translation by Thomas Cuff of the French language article: J. Cayrel; Sur la détection des galènes. [On the Detection of the Galenas.]; Comptes Rendus Hebdomadaries des Séances de l’Académie des Sciences (Paris); Vol. 180; June 8, 1925; pp. 1728-1731. Abstract: None.
Data
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English language translation by Thomas Cuff of the French language article: Paul Jégou; Phénomènes mis en jeu dans le détecteur électrolytique sans force électromotrice auxiliaire et considération théorique sur le fonctionnement des détecteurs électrolytiques. [Phenomena at play in the electrolytic detector without electromotive force and theoretic...
Data
Full-text available
English language translation by Thomas Cuff of the French language article: Édouard Branly; Radioconducteurs à limailles d’or et de platine. [Radioconductors (coherers) with filings/powders of gold or platinum.]; Comptes Rendus Hebdomadaries des Séances de l’Académie des Sciences (Paris); Vol 127; 1898; pp. 1206-1207. Abstract: None.
Data
Full-text available
English language translation by Thomas Cuff of the French language article: Paul Jégou; Détecteur électrolytiques très sensible fonctionnant sans force électromotrice auxiliaire. [Very sensitive electrolytic detector operating without an externally applied DC bias voltage.]; Comptes Rendus Hebdomadaries des Séances de l’Académie des Sciences (Paris...
Data
Full-text available
English language translation by Thomas Cuff of the French language article: H. Pélabon; Sur la détection. [On Detection.]; Comptes Rendus Hebdomadaries des Séances de l’Académie des Sciences (Paris); Vol. 181; 1925; pp. 776-778. Abstract: None.
Data
Full-text available
English language translation by Thomas Cuff of the French language article: E. Cabanel, J. Cayrel; Effet de pointe et détection cristalline. [Effect of the Point and Crystal Detection.]; Comptes Rendus Hebdomadaries des Séances de l’Académie des Sciences (Paris); Vol. XXX (Vol. 30); December 18, 1933; pp. 1602-1604. Abstract: None.
Data
Full-text available
English language translation by Thomas Cuff of the French language article: Robert Gabillard, Ladislas Raczy; Sur une explication possible de l’effet Branly. [On a Possible Explanation of the Branly Effect.]; Comptes Rendus Hebdomadaries des Séances de l’Académie des Sciences, Series B Science Physiques (Paris); Vol. 252; May 8,1961; pp. 2845-2847....
Data
Full-text available
English language translation by Thomas Cuff of the French language article: George Salmer, Robert Gabillard; Sur la rapidité de functionnement du cohéreur de Branly [On the Rapid Functioning of the Branly Coherer]; Comptes Rendus Hebdomadaries des Séances de l’Académie des Sciences, Series B Science Physiques (Paris); Vol. 262; April 18, 1966; pp....
Data
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Data
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Research
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The STM (Scanning Tunneling Microscope) and SThM (Scanning Thermal Microscope) [a.k.a., STP (Scanning Thermal Probes)] all require heat transfer calculations. This document models and solves the differential equations resulting from the assumption that the tips are distributed as opposed to lumped parameter thermal systems. Keywords: STM, SThM, STP...
Working Paper
Full-text available
If photons, which mediate the electromagnetic field, had a small, nonzero mass, then the potenial expression for a charged particle would look like a Yukawa potential. This document solves for the electric field in closed form arising from this Yukawa-like potential for various charge distributions.
Research
Full-text available
It has been known since about 1890's that applying AC voltage to the primary of a transformer can sometimes lead to damage or destruction of the transformer due to excess current in the primary, see J. A. Fleming; Experiments on the magnetic behavior of transformers at the moment of connecting them to a circuit; Journal of the Institution of Electr...
Research
Full-text available
The MOM (Metal-Oxide-Metal) devices used as diodes and mixers for laser heterodyning have many similarities to coherers. This document investigates the commonalities between these two unexplained technologies. A corrected, revised, and extended version of this document is available at the following URL: https://www.researchgate.net/publication/3341...
Research
Full-text available
Of all the coherers and MOM 'diodes', undoubtedly the ones constructed of noble metals (gold, platinum, palladium, etc.) present the greatest challenge as far as trying to explain how they work. The main difficulty is in identifying the insulating or semi-insulating film. In fact, a controversy has raged for at least the last hundred years as to wh...
Research
Full-text available
A brief technical history of the discovery of vacuum arcs and sparks is given. The converse coherer effect found in vacuum arcs and sparks is mentioned and a citation is provided. NOTE, newer version available, see: Vacuum Arc & Spark, Revision 1 - TrackChanges (June 2019): https://www.researchgate.net/publication/333965210_Vacuum_Arc_Spark_Revisio...
Research
Full-text available
This document contains a brief history of the use of the Beilby layer concept to explain numerous oddities in the physical, electrical and x-ray diffraction behaviors of surfaces as a result of polishing, burnishing or in any other way mechanically deforming the surface layer of metals, alloys, etc. NOTE, a newer version is also available on Resear...
Research
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This is a PhD proposal for investigating CC (Carrier Current) and PLC (Power Line Communications) systems.
Working Paper
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Augustus Matthiessen is famous for many scientific discoveries including Matthiessen's Rule, but there is very little biographical information about him available. This document is my attempt at filling in the missing information. I have contacted every organization in the United Kingdom to which he might have belonged during his short life.
Method
Full-text available
Most methods used to experimentally verify Matthiessen’s rule are subject to surface and bulk contamination artifacts due to the methods employed to create the fine metal wires whose resistance is being evaluated. This paper proposes a method of creating metal wires that is potentially free of these contamination artifacts. NOTE, two figure have be...
Working Paper
Full-text available
The CV (Depletion Capacitance verus Voltage Difference) expression for a reverse biased PN junction is a nonlinear expression relating C to V. This expression also contains two parameters, the built-in potential and the doping profile index. I have created a mathematical transformation that allows one to evaluate the two aforementioned unknown para...
Method
Full-text available
Proof that pole-zero cancellation of an unstable system does not render the system stable. This problem was presented on a Temple University, PhD Qualifying Examination, see Problem #3 on p. 2. The two page solution, pp. 3 & 4, is due to Tom Cuff, circa 1993.
Data
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Data
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Method
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Traditionally, there has been no direct way to obtain the values of the built-in potential difference and the doping profile exponent for a PN junction from its depletion capacitance versus reverse bias voltage difference curve. This document demonstrates a method wherein a plot of the integral of CdV versus C^2/(dC/dV) yields a straight line, from...
Conference Paper
Full-text available
From an operational point of view, it is important to be able to test the MCP (Micro Channel Plate) PMT (PhotoMultiplier Tube) front end of LIDAR transceivers used in SLR (Satellite Laser Ranging) work. In the day-today operation of SLR systems, one needs to have an independent method of ascertaining that the receiver half of the LIDAR transceiver...
Conference Paper
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Transparencies shown during the presentation of the conference paper.
Method
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This document contains the electronic schematic diagram of the custom made 3 slot NIM (Nuclear Instrumentation Module) 'crate' used to power the various laser simulators. he laser simulators are used to produce ersatz laser ranging return pulses and continuous optical noise floor to test the front end of a SLR (Satellite Laser Ranging) receiver.
Method
Full-text available
This is an electronic schematic diagram of the 4th laser simulator, which I designed to produce ersatz laser ranging return pulses sitting on top of an optical noise floor. The output of this simulator was used to test the receiver front end of a SLR (Satellite Laser Ranging) transceiver.
Method
Full-text available
This is the electronic schematic diagram of a TTL-to-PECL Converter used in Laser Simulator #3. This converter module was required because the laser module inside Laser Simulator #3 required a PECL command signal. Note, the originnal schematic was printed on 11 inch x 17 inch paper, but this version was scanned on a 11 inch x 8.5 inch copier and re...
Method
Full-text available
This is the electronic schematic diagram of a TTL-to-PECL Converter used in Laser Simulator #3. This converter module was required because the laser module inside Laser Simulator #3 required a PECL command signal. Note, the original schematic was 11 inches x 8.5 inches scanned at 1200 dpi x 1200 dpi so that it could be zoomed electronically, but st...
Method
Full-text available
This is an electronic schematic diagram of the 5th laser simulator, which I designed to produce ersatz laser ranging return pulses sitting on top of an optical noise floor. The output of this simulator was used to test the receiver front end of a SLR (Satellite Laser Ranging) transceiver. The difference between the 4th and 5th laser simulator is co...
Method
Full-text available
This laser simulator was designed and built by Richard Chabot for use in testing the LIDAR receiver front end of the MLA (Micro-Laser Altimeter). It is the prototype for the laser simulators designed and built by Thomas Cuff for use with the robotic NASA SLR2k satellite ranging system. Because there was no electronic schematic diagram extant at the...
Method
Full-text available
This is an electronic schematic diagram of the 1st laser simulator, which I designed to produce ersatz laser ranging return pulses. The output of this simulator was used to test the receiver front end of a SLR (Satellite Laser Ranging) transceiver. The difference between the 1st and 2nd laser simulator is that the 2nd laser simulator also produced...
Method
Full-text available
This document contains the electronic schematic diagram of the custom made 2 slot NIM (Nuclear Instrumentation Module) 'crate' used to power the various laser simulators. he laser simulators are used to produce ersatz laser ranging return pulses and continuous optical noise floor to test the front end of a SLR (Satellite Laser Ranging) receiver. Th...
Method
Full-text available
Solutions to selected problems in an EE PhD comprehensive exam. Note, this addendum also contains solution to problems from the 1991, 1993, 1994, and 1995 exams.
Method
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Solutions to selected problems in an EE PhD comprehensive exam.
Method
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Solutions to selected problems in an EE PhD comprehensive exam.
Method
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Solutions to selected problems in an EE PhD comprehensive exam.
Method
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Problems in an EE PhD comprehensive exam. Any hints, annotations and/or corrections to the problem statements are made by Thomas Cuff in the accompanying solutions.
Method
Full-text available
Solutions to selected problems in an EE PhD comprehensive exam.
Method
Full-text available
Solutions to selected problems in an EE PhD comprehensive exam.
Method
Full-text available
Solutions to selected problems in an EE PhD comprehensive exam.
Method
Full-text available
Solutions to selected problems in an EE PhD comprehensive exam.
Method
Full-text available
Solutions to selected problems in an EE PhD comprehensive exam.
Method
Full-text available
Solutions to selected problems in an EE PhD comprehensive exam.
Method
Full-text available
Solutions to selected problems in an EE PhD comprehensive exam.
Method
Full-text available
Solutions to selected problems in an EE PhD comprehensive exam.
Method
Full-text available
Solutions to selected problems in an EE PhD comprehensive exam.
Method
Full-text available
Solutions to selected problems in an EE PhD comprehensive exam.
Method
Full-text available
Problems in an EE PhD comprehensive exam. Any hints, annotations and/or corrections to the problem statements are made by Thomas Cuff in the accompanying solutions.
Method
Full-text available
Problems in an EE PhD comprehensive exam. Any hints, annotations and/or corrections to the problem statements are made by Thomas Cuff in the accompanying solutions.
Method
Full-text available
Problems in an EE PhD comprehensive exam. Any hints, annotations and/or corrections to the problem statements are made by Thomas Cuff in the accompanying solutions.
Method
Full-text available
Problems in an EE PhD comprehensive exam. Any hints, annotations and/or corrections to the problem statements are made by Thomas Cuff in the accompanying solutions.
Method
Full-text available
This method is a derivation of the equations used by Jui Hsin Wang in his two 1951 papers on measuring the self-diffusion of water: [1] J. H. Wang; Self-Diffusion and Structure of Liquid Water. I. Measurement of Self-Diffusion of Liquid Water with Deuterium as Tracer; Journal of the American Chemical Society; Vol. 73; No. 2; February 1951; pp. 510...
Method
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Two spherical regions, each at a different uniform temperature at t=0. Calculate the temperature in these two spherical regiona for t>0.
Method
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A semi-infinite region, z>0, of initial temperature T0 is bordered at z=0 by a plane maintained at a fixed temperature T(0,t) different from T0. Calculate the heat flux through the plane at z=0.
Method
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First solve the temperature distribution around a constant point source of heat, then solve the temperature distribution around a pulsed point source. Finally, use the two previous solutions to solve the temperature distributions for a spherical and a line heat source.
Method
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This paper is an expanded and complete derivation of the mathematics underlying the laser flash diffusivity measurement process discussed in the book: R. P. Tye (editor); Thermal Conductivity, Volume 2; Academic Press; 1969; pp. 190-196.

Questions

Questions (6)

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Projects

Projects (10)
Project
This project folder links together all the work I have done on the extraction of PN junction parameters from C versus V plots: 1) derivations, 2) data, and 3) software implementing my algorithm.
Archived project
From an operational point of view, it is important to be able to test the MCP (Micro Channel Plate) PMT (PhotoMultiplier Tube) front end of LIDAR transceivers used in SLR (Satellite Laser Ranging) work. In the day-to-day operation of SLR systems, one needs to have an independent method of ascertaining that the receiver half of the LIDAR transceiver is functioning properly. In addition, the sensitivity and stability of the MCP PMT front end of the LIDAR transceiver also needs to be periodically checked against a standardized source to prevent long and short term errors from insinuating themselves into the production data stream. The creation of ersatz laser return pulses is also useful when developing new LIDAR systems such as NASA’s micro-laser altimeter and SLR2k robotic observatory. This paper describes a number of ways of constructing a laser return pulse generator from COTS (Commercial Off The Shelf) parts. In particular, we detail the use of currently available single chip laser drivers – normally employed in fiber optic LAN (Local Area Network) and WAN (Wide Area Network) telecommunication systems – as the ‘heart’ of the generator. Fiber optics is used to ‘plumb’ the ersatz laser return pulses together with the optical noise baseline to the output connector of the generator. The use of fiber optics allows one to conveniently fold the optic path within the generator without utilizing mirrors or prisms needed in a free space design and so results in a flatter volume for the generator and obviates the need for enclosing the generator in a light tight box. Since the specifying and ordering of single chip laser drivers and fiber optic components involve considerable amounts of jargon this aspect will also be covered.
Project
Hello, In case someone is interested in using Matlab/Simulink to solve elementary heat conduction problems, I have provided a series of files for a typical 1-D conduction problem with a simple IC (Initial Condition) and some standard BC's (Boundary Conditions).