In Part I of this thesis, steady and time-dependent, natural-convection similarity flows with mass transfer are discussed. Similarity flows for natural convection on families of two-dimensional bodies with closed lower ends are enumerated, when both a temperature distribution and a suction velocity distribution are prescribed at the body surface. For steady similarity flow on a heated vertical flat plate, with mass transfer at the surface, a numerical procedure is introduced for determining the velocity and temperature profiles. These results are presented in Figs. 2 and 3. Other similarity flows may be found by the same method. A simplification, valid for “strong” suction, is discussed. An extension of Mangler's transformation [1948] is given which reduces the equations governing axisymmetric flow to those for two-dimensional flow in steady natural convection. In Part II non-linear resonant instability in parallel shear flows is discussed. A.D.D.Craik's (see Usher and Craik [I]) modified version of Bateman's [1956] variational formulation for viscous flows is employed to derive the second-order interaction equations governing the temporal evolution of a resonant wave triad in a sheer flow. (An extension of Craik's variational formulation to free surface flows is presented but is not required in the subsequent analysis for the resonance problem). This problem was treated previously using a ‘direct' approach (employing the Navier-Stokes equations) by Craik [1971]. The major advantage of the present method over the ‘direct' method is the substantial reduction in algebraic complexity. Also, a justification of the validity of Craik's previous analysis is given. For this same resonance problem, third-order interaction equations are derived by the *direct* method since, to this order of approximation, little advantage is to be gained from the variational formulation. The resonance theory is thereby developed to the same order of approximation as the non-resonant third-order theory of Stuart [1960, 1962]. An asymptotic analysis for large Reynolds numbers reveals that the magnitudes of the third-order interaction coefficients – like certain of those at second-order – are remarkably large. Such results lead to a discussion of the regions of validity of the perturbation analysis. Also some light is shed on the roles played by resonance and three-dimensionality in the non-linear instability of shear flows.

The aim of this project has been to study the detailed mass and luminosity distributions within spiral galaxies, with particular emphasis on the comparison of isolated and binary systems. A large programme of photographic U, B, Y and E surface photometry has been completed using the St. Andrews 1m Schmidt-Cassegrain telescope, and a series of computer programmes have been written to evaluate the detailed luminosity distribution of galaxies, using data from a computer -controlled, plate-scanning. Spectroscopic observations of a number of binary galaxy systems have also been made, using the Isaac Newton Telescope and the 195cm telescope at mute Provence, and well-defined rotation curves have been obtained for the galaxies in three systems. The photometry of these galaxies and of ten isolated galaxies with known rotation curves has revealed an extra outer component in the integrated luminosity distributions which has not been widely noted before. For these galaxies, the variation in mass to luminosity ratio (M/L) has been studied at large radii by extrapolating the observed rotation curves, using an empirical formula. This has revealed a general tendency for M/L to decrease with increasing radius. For most galaxies, a small, but well-defined outer peak is also seen, coinciding with the boundary of the outer component in the luminosity distribution. It is postulated that the outer component corresponds to those parts of the galaxies lying outside the outer Lindblad resonance, and this has been confirmed comparing the spiral pattern obtained from density wave theory with the 034ervod structure of the galaxies. This implies that the rotation curves are not at large radii, as they would be if a massive halo were present. This is by the fact that the luminosities of the outer components are too large for much a nalo, according to recent estimates of halo properties. In their gross properties, the binary galaxies do not differ from the isolated Two of the galaxies are, however, very luminous for their mass, and this is explained qualitatively by the tidal forces due to the neighbouring galaxy, with increase the strength of the shocks associated with the spiral arms, extrapolating to the density wave model, in turn giving rise to enhanced star formation.

M.B.A. / Sponsorship of business-to-business conferences is an effective marketing tool available to companies targeting the business market. However, as with any other marketing tool, there are various factors that influence the degree to which business-tobusiness conference sponsorship will be effective in contributing to the achievement of a company's strategic marketing objectives. For this dissertation, the research problem is that sponsors do not seem able to accurately measure the degree to which business-to-business conference sponsorship has been effective in achieving their marketing objectives. If sponsors do not know how effective sponsorship has been in achieving their objectives then they cannot make informed decisions about future sponsorships. The purpose of this study therefore, was to examine the evaluation of business-tobusiness conference sponsorship and explore the extent to which sponsors evaluate the degree to which sponsorship has met their marketing objectives. A research survey was conducted amongst senior managers responsible for marketing decisions within their organisations. The findings of the research showed that 17% of respondents did not set objectives to be achieved though their sponsorship of a business-to-business conference. By not setting objectives, it is unlikely that companies will be able to accurately determine whether the money spent on sponsorship was justified or not. A further 13% of respondents that did set objectives did not measure the extent to which the objectives were achieved. The researcher identified eight primary marketing objectives of business-to-business conference sponsorship. These are: Increasing awareness Positioning Sales Niche marketing iii Entertaining clients Database building Networking and forging new business relationships Conduct market research It was found in the research that the most commonly mentioned method to measure the extent to which business-to-business conference sponsorship objectives had been achieved was using a sales-related measure, for example sales revenue. However, the majority of respondents (60%) also indicated that it was "strongly unlikely" that sales objectives could be achieved through business-to-business conference sponsorship. It is interesting that the majority of respondents (48%) believe that it is the "fault" of the sponsors themselves that their marketing objectives have not been achieved by sponsoring a business-to-business conference, while 30% believe that the "fault" lies with the conference organiser. This report concludes with recommendations for both sponsors and conference organisers about how to improve the effectiveness of business-to-business conference

This booklet is intended to serve as a report-back to those organisations which were party to the Conference for a Democratic Future (CDF) and to those who were unable to be present. It is also intended to act as a guide to action for 1990 and beyond. The CDF was a historic gathering of the forces for change represented by 4600 delegates from over 2100 organisations. These range form Bantustan parties on the one end of the political spectrum to ultra leftist groups on the other end. But perhaps the most significant presence was from organisations like Five Freedoms Forum, NAFCOC, the Hindu Seva Samaj, that of traditional leaders and the hundreds of other community organisations which are rapidly becoming an active component of the mass struggle for change. Also significant was the strong worker representation from a range of trade unions, including eight affiliates of NACTU whose leadership had turned down the invitation to be part of the Conference. The Conference for a Democratic Future was a major step in the overall process of building unity in action and maximising the isolation of the regime. It was, in this sense, not an isolated event. The year 1989 had taken unity in action to new heights with the Defiance Campaign and the mass marches. The process leading up to the CDF was intended td be more important then the Conference itself. Likewise, in the post-Conference period, the follow-up process should be given the importance it deserves. At the end of the day, it is this follow-up process which would determine the actual success or failure of the CDF exercise. The Declaration adopted at the Conference represents the strategic orientation of the broad forces for change. It calls for the intensification of the struggle and for the placing of the question of political power on the agenda of our united mass action. The Conference resolutions collectively contain the elements of a programme of action. Without exception, each resolution is a call to action. The task of all participants of the Conference is to translate these resolutions into Mass United Action. The adoption of the Harare Declaration should act as the starting point of a process which takes its content to the masses of our people in all comers of the country. The demand for the Constituent Assembly should become a popular demand of the people. By adopting the resolution on international pressure, the Conference sends an unambiguous signal to the world community on how the people of South Africa view their role in the struggle to end apartheid. The follow-up to the Conference should also be a continuing search for whatever common ground exists between the broad forces for change. This search must take place not only at a national level, but mere importantly at a regional and local level. Let us bear in mind the words of the Declaration: “The moral appeal of the Democratic Movement has never been greater”. by an MDM delegate on the CDF Convening Committee. / Includes the Harare Declaration: declaration of the OAU Ad-hoc Committee on Southern Africa on the Question of South Africa (Harare, Zimbabwe, August 21, 1989)

A Dissertation submitted in fulfillment of the requirements for the degree Master of Science In the Faculty of Sciences at the University of the Witwatersrand, Johannesburg Johannesburg, January 2015 / Three methods, for the analyses of low levels of moisture in gas samples, were developed and optimized. The analytical techniques included Fourier Transform Infrared Spectroscopy (FTIR) and Pulsed Discharge Helium Ionization/Gas Chromatography (PDHID/GC). The methods included the direct analyses of moisture in gas samples using FTIR as well as the analysis of acetylene (C2H2) by FTIR and GC/PDHID. For the latter methods, the purpose was to convert the moisture in a gas sample to C2H2 by hydrolization of the calcium carbide (CaC2) with moisture to C2H2 and then analyze the resulting C2H2 content by FTIR or GC/PDHID. The C2H2 result was then converted back to moisture to obtain the moisture content of the sample. The FTIR moisture method developed provided eleven different wavenumbers for quantitation providing a wide analytical scope, specifically in complex gas matrices, where there is often peak overlap between matrix and moisture. A heated eight meter glass long path gas cell and a mercury cadmium telluride (MCT) detector were utilized. The FTIR method required much greater volumes of sample than the GC method but allowed for direct analysis of moisture without prior conversion to acetylene. Moisture permeation standards were used for calibration and the LOD’s ranged from 0.5 to 1 ppm with quantification possible from 0.5 to 10ppm. For the FTIR C2H2 method various concentration ranges were established from 50 up to 2000 ppm. Three wavenumbers were evaluated for C2H2 and methane was introduced as an internal standard. The use of methane as an internal standard provided better r2 values on the calibration data than for the tests run without internal standard. A gas chromatographic (GC), pulsed discharge helium ionization detector (PDHID) method for the determination of moisture content in small quantities of gases, based on the conversion of the moisture to acetylene (C2H2) prior to analysis, was developed. The method developed on the GC/PDHID for C2H2, provided a quantitation range from 0.6 to 7.7 ppm. Conversion of the moisture to acetylene was achieved by hydrolysing an excess of calcium carbide (CaC2) in a closed reaction vessel with a measured volume of a sample containing a known quantity of moisture. The gaseous reaction mixture was transferred, using helium (He) carrier gas, to a GC/PDHID, set up with “sample injection and heart cut to detector” to prevent matrix disturbances on the PDHID, for analysis. The acetylene concentration values thus obtained were converted back to moisture values and percentage recoveries calculated. A similar conversion process was applied on FTIR. The conversion of moisture to C2H2 using CaC2 was tested and proven to be viable. Quantification was not possible as the available sample holder could not be adequately sealed to prevent air ingress. This led to higher C2H2 values than expected. This process can be optimized by the design and production of a sealed sample holder.

No description available.

The Henry Mountains from the standpoint of plant geography are among the most interesting in the Rocky Mountain Region for they are entirely surrounded by desert and their unique location results in an intermingling of southern , eastern , and northern forms in the flora of this vicinity . In spite of these facts very little collecting or floral study has been done here and the Henry Mountains are still almost unknown floristically . This is unfortunate for much of the original vegetation has changed due to overgrazing by sheep . This preliminary study was undertaken with the view of obtaining a knowledge of the floristics of this region before still greater changes take place. This report is based upon a visit made to this region extending from June 15th to August 15th of 1930 and from April 31st to May 4th of 1931 . Most of the collecting and observations were confined to Mount Ellen, the northern-most peak of the range .

v.1. Surveillance and target tracking--v.2. Systems architecture and evaluation--v.3. Communication, data bases & decision support--v.4. C3 theory. / edited by Michael Athans ... [et al.]. / Includes bibliographies. / "OSP number 85552"--Cover. / Library has v. 2 only. / Workshop suppported by the Office of Naval Research under contract ONR/N00014-77-C-0532

v.1. Surveillance and target tracking--v.2. Systems architecture and evaluation--v.3. Communication, data bases & decision support--v.4. C3 theory. / edited by Michael Athans ... [et al.]. / Includes bibliographies. / "OSP number 85552"--Cover. / Library has v. 2 only. / Workshop suppported by the Office of Naval Research under contract ONR/N00014-77-C-0532

v.1. Surveillance and target tracking--v.2. Systems architecture and evaluation--v.3. Communication, data bases & decision support--v.4. C3 theory. / edited by Michael Athans ... [et al.]. / Includes bibliographies. / "OSP number 85552"--Cover. / Library has v. 2 only. / Workshop suppported by the Office of Naval Research under contract ONR/N00014-77-C-0532