Engineering Commons^™

Analysis Of On-Ramp Capacities By Monte Carlo Simulation And Queuing Theory, Robert Frank Dawson

JTRP Technical Reports

No abstract provided.

Test 873: Oliver 1650 Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 874: Oliver 1650, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 875: Oliver 1850, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 869: Oliver 1850 Diesel 4wd, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 871: Oliver 1950 Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Crossings For Channels And Drains In The Ord River Area, K S. Cole

Journal of the Department of Agriculture, Western Australia, Series 4

ON farms irrigated by surface methods it is essential to provide crossings over channels and drains.

These crossings must be wide and strong enough to take the biggest farm machinery.

Analysis Of Space Frames By Moment Distribution., Ting-Hwa Wang

Masters Theses

"This work presents an analysis of space frames and planar frames loaded in different planes by the method of moment distribution and the theory of superposition. From this analysis it is found that the torsional stiffness of frame members has a great effect on the final bending moments when twisting moments are applied to the frame. The analysis of space frames considering the forces, stresses, and moments in all three dimensions always yields a design more accurate and economical in material than the traditional planar frame analysis"--Abstract, p. i

Synthesis Of Unity-Gain Rc Networks From Second Degree Transfer Functions., Ronald L. Mcnally

Masters Theses

"A synthesis procedure is presented which realizes second order open circuit transfer functions. This procedure is developed using parallel networks. The transfer functions for each parallel network are obtained by use of separation parameters. Two constraints are used in the development: first, the realized network must be an RC network; second, the desired multiplicative gain constant must be realized. With these constaints a parameter space is developed which aids in the selection of the proper parallel networks to be combined. Necessary and sufficient conditions are developed which are used to test the transfer functions. The realization simply consists of the …

Test 863: Minneapolis-Moline U302 (Lpg), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 866: Zetor 2011 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 870: Oliver 1850 Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 872: Oliver 1950 Diesel 4wd, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 876: Oliver 1850 4wd, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

The Submerged Culture Of Thiobacillus Thio-Oxidans In A Pilot Scale Fermentor, Edward Hibbert Crum

Masters Theses

"A strain of Thiobaci.llus thiooxidans was isolated from a West Virginia coal mine drainage. This strain was characterized by its production of sulfuric acid in shake flasks. The strain was also compared with a pure culture of h thiooxidans obtained from the American Type Culture Collection (ATCC number 8085).

The strain was grown in submerged culture in a 16-liter pilot scale fermenter. Two aeration systems, air and air enriched with carbon dioxide, were examined. The air enriched with carbon dioxide gave a much more rapid growth rate. The culture reached the mid-log phase of growth after 80 hours of incubation …

An Investigation Of The Adaptability Of The Linvill Model For Transistor Synthesis, John A. Reagan

Masters Theses

"The Linvill transistor model may be used for transistor synthesis if the model accurately approximates transistor response and may be readily simulated on an analog computer. Experiments were performed on a transistor to determine the Linvill model parameters. The transistor's large-signal transient response was investigated by pulsing the emitter with a current that drove the transistor from the active region of operation into saturation. The same problem solved experimentally was then solved analytically by replacing the transistor with the Linvill model. The experiment was then simulated on an analog computer by using the equations that govern the Linvill model's response. …

On Optimum Receiver Using Decision Theory, Philip T. Tai

Masters Theses

“In recent years communication engineers have given increased attention to the study of communication through random media. The name random is used to describe a medium the properties of which are stated only in a statistical sense. For example the impulsive response of a certain medium may only be known as one of an ensemble of possible impulsive responses; the particular member of interest being drawn up according to some statistical rule. In other words there exists some "uncertainty" concerning the characteristic description of the medium. Significant work on these problems has been done by Price and Turin. Related work …

An Analysis Of The Simulated Inductande Obtained From Forward Biased Semiconductor Diodes., Everett Harold Vannoy

Masters Theses

"The problem undertaken in this thesis is to study the simulated inductance observed in forward-biased abrupt junction p-n diodes with a highly doped p region and a nearly intrinsic n region and show that it is due to conductivity modulation. Unlike other analyses of this phenomenon, a voltage step is applied to the diode in such a direction as to forward bias it and the behavior of the injected minority carriers are observed. By comparing the resultant current through the diode to the relationship predicted by the equivalent circuit of the diode, an expression is obtained for the simulated inductance. …

The Dissolution Of Deformed Magnesium In Sulfuric Acid., William J. Daniels

Masters Theses

"The negative difference effect exhibited by magnesium while anodically dissolving in saline solutions has been attributed in part by Kokoulina and Kabanov to the expulsion of univalent magnesium ions ^{1, 2}. Recent experimenters have discounted the concept of the anodic expulsion of uncommon valency ions and have explained both the positive and negative difference effects observed for magnesium in dilute acids on the basis of anodic polarization, film disruption, and disintegration of the magnesium anode, i.e. "chunk effect"^{3, 4}.

The purpose of this present investigation was to study the difference effect for deformed magnesium in a dilute …

Forced Convection Heat Transfer Coefficients And Induction Heating, Max Edwin Light

Masters Theses

“The purpose of this study was to design and build an apparatus to experimentally determine the convective heat transfer coefficients for water flowing in a horizontal tube at turbulent flow. Also it was planned to use the apparatus to investigate the spatial dependence of energy deposition by induction heating.

An instrument and measuring techniques were developed that gave reasonable correlations between experimentally determined heat transfer coefficients and values calculated from generally accepted heat transfer relationships developed by other experimenters. Most of the calculated values were within ± 10% of the experimental values for a wide range of flow rates.

It …

The Effect Of Cation Size Of Xanthate Collectors In Sulphide Flotation., R. W. Bourne

Masters Theses

"Batch flotation tests on Utah Copper ore were used to show the effect of collector cation size.

The results obtained were:

(1) Recovery of copper in the concentrate decreases with increase in the size of the collector cation.

(2) Increased recovery with ethyl over that for amyl with a given cation.

(3) No beneficial recovery with sulphur enriched xanthates.

Statistical techniques were used to ascertain if significant differences in results were present"--Abstract, p. i

The Effect Of Moisture Content On The Action Of Sea Coal In Molding Sands., Robert J. Endres

Masters Theses

"An assumption was made that an increase in moisture content in the sand would result in an increase in the amount of volatile matter retained in a sand, clay, water, and sea coal mixture which had been subjected to the heat of molten iron. Because of a lack of positive evidence to support this assumption, it was concluded that the volatile matter retained within the sample is independent of the moisture content.

It was also shown that the volatile products do not travel back through the sand, away from the mold-metal interface. Rather, the volatiles escape from the sand and …

The Removal Of Residual Organic Materials From Sewage Plant Effluents Using Continuous Foam Flotation., Ajab S. Malik

Masters Theses

"This investigation was conducted to determine the feasibility of using a continuous foam flotation process for the removal of soluble organic materials from sewage treatment plant effluents. All effluents contained alkyl benzene sulfonates (ABS), derived from synthetic detergents. The studies were conducted on a laboratory scale. The reduction in the chemical oxygen demand was used as a measure of the effectiveness of the removal of the organic materials. In addition, ABS determinations were employed to study the fate of the detergent.

A flotation cell, equipped with the means of controlling the air and liquid flow rates, was used. Air flow …

The Resolution Of Two Known Signals In White Gaussian Noise., Peter Cheng-Fang Wang

Masters Theses

"The problem of resolving two signals F1(t) and F2(t) in white Gaussian noise n(t) is treated here as a problem in statistical decision theory. We assume a situation in which one of two similar signals is present and an observer is asked to make a decision concerning which of the signals is present with a tolerable probability of error. The observer is allowed to use the best system which he can design for this particular purpose. Of course, this observation will be disturbed by noise and therefore, the observer is led to ambiguous selections. It is apparent that the optimum …

The Plastic Behavior Of Beams With Butt Welded Connections., Paul George Hayes

Masters Theses

"The purpose of this study is to determine the length of butt welds required to develop the full plastic section modulus of a 6 WF 20 rolled section of A-36 steel. The members were electric arc welded with LR 6070 electrodes. Two-point loading was used to develop a zone of pure moment with zero shear where these members were joined.

At the cross-section to be welded, all the flange edges were prepared to receive a single-vee butt weld and the webs were prepared for a double-vee butt weld. In all cases the full length of the flange was welded. However, …

A Study Of The Phase Behavior Of Carbon Dioxide-Methane-Normal Decane Systems, Raja Audi Mansoor

Masters Theses

“The effect of carbon dioxide concentration, on solubility has been studied for several carbon dioxide-methane-n-decane systems. Experimental results were obtained using differential vaporization tests. Computational results were obtained using equilibrium constants.

The relation between solubility, bubble point pressure and solution carbon dioxide is presented. A ternary diagram showing the bubble point pressure behavior as a function of system composition is also presented”--Abstract, page ii.

The Imperfect Structure Of Ti-, Zr-, And Hf- Nitrides Containing An Excess Of Nitrogen., Chester A. Faunce

Masters Theses

"Chemical analyses were made on all three nitrides using oxidation, Kjeldahl, dissolution and gas evolution techniques, and the chemical formulae were calculated. They are as follows: Ti_0•931^N, Zr_0•970^N, and Hf_0•792^N.

The lattice constant of all the nitride samples was determined at 25°C. The Ti_0•931^N sample obtained from Union Carbide Company had a lattice parameter of 4.23986± 0.00007A⁰, while the sample from W. Germany, Ti_1.0^N in the as received condition had a lattice parameter of 4.24027 t 0.00003A⁰• A second lattice parameter determination was …

The Anodic Dissolution Of Cadmium In Aqueous Solution, Yun-Chung Sun

Masters Theses

"The increasing importance of prevention of corrosion in industry has stimulated extensive studies on the fundamental behavior of metals in corrosive media.

The basic mechanism of the anodic dissolution of metals such as cadmium, magnesium, and zinc in salt solutions is not completely known. Several mechanisms have been proposed by different investigators, but evidence is still lacking to draw unquestionable conclusions to explain the discrepancies which often arise between coulometric data and weight loss of metal electrodes in certain salt solutions.

The purpose of this investigation was to obtain experimental data for anodic dissolution of cadmium in various electrolytes and …

Sonic Flow Meter., Daniel E. Wilson

Masters Theses

"The purpose of this thesis was to construct a device to measure the velocity of air employing sound waves. The principle of operation of the device is that the time interval required for the sound wave to travel between two points in the duct is a function of the fluid velocity. This time interval was measured both with the air flowing and with the air stationary. An equation was derived such that the mean velocity of the flowing air could be calculated by knowing the two-time intervals.

The mean velocity determined by this device was compared to the mean velocity …

Time Optimum Switching Zones In Multiple-Valued Control Systems, Jack Leroy Crawford

Masters Theses

"Present control system theory provides the criteria necessary to bring a second-order single-valued system to rest in a minimum time after a step input. The bang-bang type controller has been developed to obtain this optimum response.

However, existing theory fails to provide the necessary information to obtain the optimum response from a second-order rotational system when multiple values of angular position are allowed. This thesis extends the control theory to include these multiple-valued systems by showing the existence of what are called optimum switching zones. These zones predict which of the infinite number of switching curves in a multiple-valued system …