109 Technical Papers

Agoston, A.; Pepper, S.; Norton, R.; Ebner, J.; Schoen, K.   2003

The performance of this sampling component enables significant advancements in high-speed test and measurement equipment and mm-wave Ultra-wideband (UWB) receivers.

Hiscocks,Peter   2001

Goodson, Dave; Lepper, Paul   1995

Although most of the easily available piezo ceramic disks work well, those extracted from greeting cards with diameters around 28 mm. are best.

to be used with the cheap sensitive hydrophone

Goodson, Dave; Lepper, Paul   1995

Ganssle, Jack G.   2004

Build a shaft encoder using parts you can salvage from dead computer mice

Smith, Doug   2002

COSMAC ELF II

Pittman, Tom   1980

Most of what I say in this chapter is specific to the 1802, and much of it is limited to a particular computer, the Netronics ELF II, which contains an 1802 microprocessor.

In partial fulfillment of the Requirements for the Degree of Bachelor of Engineering

Ong Yun Han   2004

The objective of this project is to design a single crystal low noise hydrophone for submarine and ships detection. The hydrophone is passive, and uses PZN-8%PT piezoelectric crystal as the transduction element.

Jehl, Francis  

About the bamboo for Edison's incandescent lamp (1880)

Sønnico   2005

NASA SP-8007

unknown   1968

NASA Space Vehicle Design Criteria (structures)

Klemetsen, Lars Erik; Sivertsen, Henrik; Tande, Jørgen   2005

Kusunose, Yuziro   1929

Moore, B.T.; Smith, B.S.   1995

The minimum potential required for complete cathodic protection has been determined for BIS 812 EMA steel which is being used for the main pressure hull of the Royal Australian Navy's Collins Class Submarine. The experimental method provided plots of weight loss versus applied potential ranges. These were decided from determinations of the corrosion potentials of the two steels. The minimum protective potential determined was -740 mV, compared with -710 mV for HY80 and -790 mV previously determined for mild steel.

National Semiconductors   1981

Actel Corporation   2004

Ross, Carl T. F.   2004

The paper describes a finite element investigation into the buckling, under uniform external pressure, of four submarine pressure hulls. Two of these hulls were traditional ring-stiffened types, but the other two were in the form of corrugated circular cylinders.

unknown  

Compression Waves in Air. (Sound Waves). Lab-Specific Goals: ... column of air, the length of which will be used to calculate the speed of sound. ...

Introduction

Huang, Howard   2003

Boolean Algebra

Huang, Howard   2003

Karnaugh Maps

Huang, Howard   2003

Basic Circuit Design and Multiplexers

Huang, Howard   2003

Decoder-based Circuits

Huang, Howard   2003

Other Combinational Circuit Topics

Huang, Howard   2003

Addition and Multiplication

Huang, Howard   2003

Subtraction

Huang, Howard   2003

Arithmetic Logic Units (ALU)

Huang, Howard   2003

Floating-Point Arithmetic

Huang, Howard   2003

Flip-Flops

Huang, Howard   2003

Sequential Circuit Analysis

Huang, Howard   2003

Sequential Circuit Design

Huang, Howard   2003

Registers and Counters

Huang, Howard   2003

Random Access Memory

Huang, Howard   2003

Datapaths

Huang, Howard   2003

Instruction Set Architectures

Huang, Howard   2003

Other Instruction Set Architectures

Huang, Howard   2003

Instruction Encoding

Huang, Howard   2003

Control Units

Huang, Howard   2003

More Advanced CPUs

Huang, Howard   2003

Memory and IO

Huang, Howard   2003

Introduction

Huang, Howard   2003

Basic MIPS Architecture

Huang, Howard   2003

More MIPS Instructions

Huang, Howard   2003

Functions in MIPS

Huang, Howard   2003

MIPS Examples

Huang, Howard   2003

Intel 8086 Architecture

Huang, Howard   2003

Performance

Huang, Howard   2003

MIPS Arithmetic

Huang, Howard   2003

Multiplication

Huang, Howard   2003

MIPS Floating-Point Arithmetic

Huang, Howard   2003

Single-Cycle MIPS Processor

Huang, Howard   2003

Multicycle Datapath

Huang, Howard   2003

Multicycle Control

Huang, Howard   2003

Multicycle Conclusion

Huang, Howard   2003

Pipelining

Huang, Howard   2003

Pipelined Datapath and Control

Huang, Howard   2003

Forwarding

Huang, Howard   2003

Stalls and Flushes

Huang, Howard   2003

Exceptions and Interrupts

Huang, Howard   2003

Advanced Processor Designs

Huang, Howard   2003

Cache Introduction

Huang, Howard   2003

More Cache Organizations

Huang, Howard   2003

Cache Performance

Huang, Howard   2003

Cache Writes and Examples

Huang, Howard   2003

Introduction to IO

Huang, Howard   2003

Buses

Huang, Howard   2003

PC IO

Huang, Howard   2003

Kinch, Richard J.   2006

Steppers are appealing because they seem cheap compared to servos. But the price advantage only works for small torque and speed requirements. If you analyze the demands of moving a large X-Y table with desirable velocity and force, servos can do a better job for about the same price. My stepper motor experiments started out with the notion that I could build my own inexpensive stepper controllers with a few transistors, which I was able to achieve. However, the simple stepper controllers cannot run a large motor, and cannot run any motor faster than a few 100 rpm. The sophisticated controllers that achieve higher stepping speeds (1000 rpm or more) and torque are so costly that they don't compete with the cheaper servo controllers. If you add the cost of encoder feedback to guard against lost steps, you wind up with a still more expensive system.

Detailed description of dekatron operation

unknown  

Some more data

unknown  

unknown  

unknown  

Servais, Pierre   2006

Barto, Rod   1999

This report examines several timing analysis methods, and discusses their strengths and weaknesses.

Radio Talk on Echo Sounding by Dr. Herbert Grove Dorsey

Dorsey, Herbert Grove   1932

Through his amplifier coupled with his invention of the Fathometer, an electro-mechanical sounding instrument, Mr. Dorsey was able to develop a means of measuring both very shoal water and very deep water with the same instrument.

Kinch, Richard J.   2007

Air compressors for the home or small shop have been advertised and sold with ridiculously inflated horsepower ratings.
But you do not need a testing laboratory to calculate true horsepower or CFM delivered. I will explain how to estimate these ratings from pressure readings and elapsed time measurements.

A practical introduction to the ultra wideband technology

Staderini, Enrico M.  

A practical hands-on description on how to built a prototype of an ultra wideband (UWB) radar is presented.

Margeridis, J.; Mart, P.L.   1995

Conventional diesel-electric submarines must surface periodically to recharge their batteries by using generators driven by air breathing diesel engines. During this time, submarines are most vulnerable to detection. Air independent propulsion (AIP) systems are being developed that will generate electrical power while the submarine is submerged. Such systems provide power for recharging the batteries, for propulsion and for the submarine's other electrical equipment requirements, while the submarine is submerged. Fuel cells, one of the leading AIP contenders, are electrochemical energy converters that enable the chemical energy of a stored fuel and an oxidant to be converted directly to electricity. This Report reviews the main operational requirements of AIP systems in diesel- electric submarines, with the main objective of surveying the various types of fuel cell systems and ranking them in order of suitability for possible future use as AIP systems in the COLLINS Class submarine. Descriptions are given of the six fuel cell types currently in use or under development for terrestrial power generation, but particular attention is given to those systems that are in use or have the greatest potential for sub- sea applications. The particular advantages of fuel cells compared with heat engines are highlighted, as well as the limitations imposed by fuel requirements. It is emphasised that for submarine AIP applications, there is no single optimum selection of fuel cell system, or of the fuel and oxidant and their associated storage and reactant processing systems. Each submarine application must be assessed on the basis of a number of different, and sometimes competing, criteria which will be weighted differently for different applications and strategic scenarios. It is concluded, however, that low temperature fuel cells are generally better suited for submarine applications, with the solid polymer electrolyte fuel cell having particular advantages.

unknown  

original instruction book for the Edison NiFe battery

Lienau, Peter; DiGiulian, Tony   2004

Prior to World War I, it was known that the human eye can measure angles to a minimum error of 10 angular seconds. This is the smallest angle that one can recognize between an object and a certain measuring mark by using special instruments. The effect of this minimum eye-error in terms of measuring distance with a range finder can be calculated with respect to the base-length of the rangefinder. For a rangefinder with a base length of 3 m and a twenty-fifth fold magnification, at 20 hm the error would be +/- 2.6 m, at 100 hm the error would be 65 m and at 160 hm it would be 165 m. This error is linear, that is, if you double the base-length of the rangefinder, then the fault distance is reduced by half.

Redhead, P. A.  

An outline of the early history of vacuum devices (pumps and pressure gauges) is presented, from the first recorded experiments in the 1640s to the start of the modern period of vacuum technology when ultrahigh vacuum was introduced in 1950.

(An Engineer's Practical Guide)

Boynton, Richard; Wiener, Kurt   2001

Describes the technique for combining the mass properties of sub-assemblies to yield the composite mass properties of the total vehicle.

Donovan, Sarah-Louise; Triggs, Tom   2006

Delco-Remy Service Manual   1935

Development of a low cost thruster for the Santa Clara University ROV Program

Boenig, William; Kalman, Eric   2004

Previous work to develop a thruster did not meet performance goals, motivating the pursuit of an improved design. Among the improvements over the previous design are a more powerful motor, an integrated electronic motor controller, and a more reliable water-proof housing. Extensive research into alternative designs for each of the major components was also conducted, and recommendations were made for future work on this project.

Texas Instruments   1997

This document describes metastable response in digital circuits. After a definition of a metastable state, a test circuit is provided, its responses analyzed, and test results given. Examples show the influence of metastability on the response of asynchronous circuits and measures for improving reliability are assessed.

A comparison of two methods for implementing the control logic for a simple CPU

Koopman, Phil   1987

Sherrit, S.; Badescu, M.; Bao, X.; Bar-Cohen, Y.; Chang, Z.   2004

Folded horns have been conceived as alternatives to straight horns used as resonators and strain amplifiers in power ultrasonic systems. Such systems are used for cleaning, welding, soldering, cutting, and drilling in a variety of industries. In addition, several previous NASA Tech Briefs articles have described instrumented drilling, coring, and burrowing machines that utilize combinations of sonic and ultrasonic vibrational actuation. The main advantage of a folded horn, relative to a straight horn of the same resonance frequency, is that the folded horn can be made shorter (that is, its greatest linear dimension measured from the outside can be made smaller). Alternatively, for a given length, the resonance frequency can be reduced. Hence, the folded-horn concept affords an additional degree of design freedom for reducing the length of an ultrasonic power system that includes a horn.

Sherrit, S.; Askins, S. A.; Gradziol, M.; Dolgin, B. P.; Bao, X.; Bar-Cohen, Y.; Chang, Z.   2002

The folded horn produces resonances in the frequency range of the standard horn even though the device is approximately half the size.

Burch, I.A.; Saunders, D.S.   1995

The tensile properties and fracture behaviour of two submarine construction steels, BIS 812 EMA and Q1N, have been studied. Their properties and fracture behaviour were measured and observed over a wide range of test temperatures utilizing plain and notched tensile specimens. The yield strength of both materials was found to increase with decreasing temperature and the fracture surface appearance of these steels was also temperature dependent. Under certain conditions "star fracture" was exhibited rather than the usual cup-and-cone type fracture. The predominance of the "star type fracture" increased with decreasing temperature in both plain and notched tensile specimens, however, it was suppressed by notching. This paper describes the fractographic features of the surfaces and proposes that a range of conditions exist under which "star fracture" occurs in these materials.

SCIENTIFIC AMERICAN SUPPLEMENT NO. 303, NEW YORK, OCTOBER 22, 1881

Rood, Ogden N.  

In the July number of this Journal for 1880, I gave a short account of certain changes in the Sprengel-pump by means of which far better vacua could be obtained than had been previously possible.

Agoston, A   2002

This technology can extend the UWB receiver design from the MHz domain into the mm-wave region.

Part 1. Hydrodynamics

Joubert, P.N.   2004

Part 2. Shape of a Submarine 2026

Joubert, P.N.   2006

The Protection of Shipping by a Wall of Sound and other Uses of the Submarine Telegraph Oscillator

Blake, R. F.   1914

The following paper was written in 1914 following the successful testing of the first electro-mechanical sounding system, the Fessenden Submarine Oscillator. This instrument was invented by Dr. Reginald Fessenden of the Submarine Signal Company, an early forerunner of a major electronics and defense company. As the name of the company suggests, the primary goal in developing the Fessenden Oscillator was to communicate between ships and between ships and shore facilities. The idea was to "protect shipping with a wall of sound" that would allow vessels to better determine their position as well as to communicate with shore facilities and other vessels. Apparently the concept of using the oscillator to determine depths was an afterthought. Ironically, although today there are some applications for submarine signaling, the primary uses for the descendants of the Fessenden Submarine Oscillator are in the measurement of depths, generation of sidescan sonar imagery, and in the observation of other geophysical and physical oceanographic parameters.

Porter, Harry   2006

An Overview

Porter, Harry   2006

The computer consists of 4 components: ALU (Arithmetic Logic Unit), Register Unit, Program Control Unit, and Sequencing Unit.

Norwood, C.   1995

The vibration vibration characteristics of a submarine hull have an important influence on the noise signature. A submarine hull, or portion of one, can frequently be idealised as a ring stiffened cylinder subjected to external loading from the surrounding water, for the purposes of vibration analysis. The modal behaviour of ring stiffened cylinders is reviewed, including the effect of external pressure loading and added mass effects from surrounding fluid. The existing literature literature is inadequate in its coverage of the problem and these shortcomings are discussed, in order to identify the requirements for further work in order to be able to satisfactorily analyse a submarine hull structure.

Brady, Kevin   2006

This 5-page essay performs a critical analysis on electric motors in general.

SMD devices are, by their very nature, too small to carry conventional semiconductor type numbers. Instead, a somewhat arbitrary coding system has grown up, where the device package carries a simple two- or three-character ID code.

AT&T, Bell Telephone Company   1955

Chambers, Peter   1997

This report will give you some pointers that will help you design synchronous circuits that work first time. Ten commandments that should always be followed!

Burch, I.A.; Saunders, D.S.   1995

The tensile properties and tensile fracture of BIS 812 EMA and Q1N naval construction steel weldments have been studied over a wide range of test temperatures utilizing plain and notched tensile specimens. Under certain conditions "star" fracture is the preferred fracture mode, rather than the usually observed cup-and-cone type fracture. The propensity for "star fracture" increases with decreasing temperature and the transition temperature for cup-and-cone to "star" fracture is reduced by notching. This paper describes the fracture surface features resulting from tensile tests and the conditions under which they occur in these materials.

I. Underwater Sound Transducers

Sherman, Charles H.   1975

II. Sonar System Technology

Winder, Alan A.   1975

III. Progress in Underwater Acoustics

Marsh Jr., Henry W.   1975

Using Telegraphists and Morse Code

Royal Navy's Museum of Radar and Communications  

Well before the first world war, Reginald Fessenden, an eminent scientist, had discovered what he called his Fessenden Oscillator...
Ref.:  Royal Navy's Museum of Radar and Communications

Rules for Building and Classing

American Bureau of Shipping   2002

Used together with this calculation spreadsheet.

McEwan, Thomas E.; Kilkenny, Joseph D.; Dallum, Gregory   1994

This digitizer can be used as a compact, low-cost receiver for complete echo acquisition. It allows faster image formation with less noise corruption than is possible with high-speed oscilloscopes (i.e. impulse radar).