Showing items 36541 - 36560 of 63339

Nondel'ekhaya

- Mbizweni, Nowayilethi, Lungisa, Nofirsti, Composer Not Specified, Dargie, Dave, Kape, Maggie

Nondel'ekhaya

- Mbizweni, Nowayilethi, Lungisa, Nofirsti, Composer Not Specified, Dargie, Dave, Kape, Maggie

Nondel'ekhaya: leader and follower alone

- Mbizweni, Nowayilethi, Lungisa, Nofirsti, Scherk, Marwiga, Sister, Composer Not Specified, Dargie, Dave, Kape, Maggie

Nondel'ekhaya: Normal Voices

- Mbizweni, Nowayilethi, Lungisa, Nofirsti, Scherk, Marwiga, Sister, Composer Not Specified, Dargie, Dave, Kape, Maggie

Nondel'ekhaya: solo Ngomqangi

- Mbizweni, Nowayilethi, Lungisa, Nofirsti, Composer Not Specified, Dargie, Dave, Kape, Maggie

Nondel'ekhaya: Umngqokolo Duet

- Mbizweni, Nowayilethi, Lungisa, Nofirsti, Scherk, Marwiga, Sister, Composer Not Specified, Dargie, Dave, Kape, Maggie

Nondel'ekhaya: Umrhubhe Bow

- Mbizweni, Nowayilethi, Lungisa, Nofirsti, Composer Not Specified, Dargie, Dave, Kape, Maggie

Nondel'ekhaya: with clapping and dance

- Mbizweni, Nowayilethi, Lungisa, Nofirsti, Scherk, Marwiga, Sister, Composer Not Specified, Dargie, Dave, Kape, Maggie

Nondere

- Performer not specified, Composer not specified, Dargie, Dave

Nong (Vulture)

- Tlokotsi Lesikara and Mohomane, Hugh Tracey

Nongangela (All the young men from Timgqimqi's location are alike)

- Sam Tyutwana, Hugh Tracey

Nongelema Mufana Obetele (Nongelema, the best young man)

- Group of Xhosa men and women, Hugh Tracey

Nongxaki

- Jum, Ncubela, The Imaginative Boys, Tracey, Hugh

Nonjani

- Dargie, Dave, Ngqoko Herd Boys

  • Authors: Dargie, Dave , Ngqoko Herd Boys
  • Date: 1981-10-24
  • Subjects: Folk music--Africa , Field recordings , Africa, Sub-Saharan , Africa South Africa Lumko f-sa
  • Language: Xhosa
  • Type: sound recordings , field recordings , sound recording-musical
  • Identifier: http://hdl.handle.net/10962/258825 , vital:53022 , International Library of African Music, Rhodes University, Makhanda, South Africa , Dave Dargie Field Tapes, Rhodes University, Makhanda, South Africa , DD025-07
  • Description: Church music, church hyms, Choral music.
  • Full Text: false
  • Date Issued: 1981-10-24

Nonkala

- Cape inkspots of Grahamstown, Mpelho, Jury, Tracey, Hugh

Nonkala (The crab)

- Jury Mpelho, Hugh Tracey

  • Authors: Jury Mpelho , Hugh Tracey
  • Date: 1957
  • Subjects: Folk music--Africa , Folk songs, Xhosa , Africa South Africa Grahamstown f-sa
  • Language: Xhosa
  • Type: sound recordings , field recordings , sound recording-musical
  • Identifier: http://hdl.handle.net/10962/135934 , vital:37314 , International Library of African Music, Rhodes University, Grahamstown, South Africa , TR027-06
  • Description: The crab, being a water animal, is this case, a river crab, is being addressed as a diviner. The Xhosa believe their ancestral spirits inhabit streams. Topical song with dance band including saxaphone, double bass, guitar and drum
  • Full Text: false
  • Date Issued: 1957

Nonke sizwe zonke

- Ekusileni Church Choir, Hlabano, William, Dargie, Dave

Nonkululeko Rabi one of the experienced actresses now again teamed up with Kente.

- Rabi, Nonkululeko

  • Authors: Rabi, Nonkululeko
  • Date: 19??
  • Subjects: UNCATALOGUED
  • Type: Image
  • Identifier: http://hdl.handle.net/10962/236925 , vital:50465 , DTC-123
  • Description: Clipping of the Nonkululeko Rabi an actress. , Use of this resource is governed by the terms and conditions of the Creative Commons "Attribution-NonCommercial-ShareAlike" License (http://creativecommons.org/licenses/by-nc-sa/2.0/) (NEVER CAHNGE THIS FIELD)
  • Full Text: false
  • Date Issued: 19??

Nonlinear effects with a focus on cross phase modulation and its impact on wavelength division multiplexing optical fibre networks

- Gamatham, Romeo Reginald Gunther

  • Authors: Gamatham, Romeo Reginald Gunther
  • Date: 2013
  • Subjects: Wavelength division multiplexing , Optical communications , Fiber optics
  • Language: English
  • Type: Thesis , Doctoral , PhD
  • Identifier: http://hdl.handle.net/10948/6302 , vital:21071
  • Description: The demand for faster data transmission is ever increasing. Wavelength division multiplexing (WDM) presents as a viable solution to increase the data transmission rate significantly. WDM systems are based on the ability to transmit multiple wavelengths simultaneously down the fibre. Unlike time division multiplexing (TDM) systems, WDM systems do not increase the data transfer by increasing the transmission rate of a single channel. In WDM systems the data rate per channel remains the same, only multiple channels carry data across the link. Dense wavelength division multiplexing (DWDM) promises even more wavelengths packed together in the same fibre. This multiplication of channels increases the bandwidth capacity rapidly. Networks are looking into making use of technology that will ensure no electronic signal regeneration at any point within the DWDM network. Examples are; reconfigurable optical add/drop multiplexers (ROADM) and optical cross connect (OXC) units. These components essentially enable network operators to split, combine and multiplex optical signals carried by optical fibre. WDM allows network operators to increase the capacity of existing networks without expensive re-cabling. This provides networks with the flexibility to be upgraded to larger bandwidths and for reconfiguration of network services. Further, WDM technology opens up an opportunity of marketing flexibility to network operators, where operators not only have the option to rent out cables and fibres but wavelengths as well. Cross phase modulation (XPM) poses a problem to WDM networks. The refractive index experienced by a neighbouring optical signal, not only depends on the signal’s intensity but on the intensity of the co-propagating signal as well. This effect leads to a phase change and is known as XPM. This work investigates the characteristics of XPM. It is shown that, in a two channel WDM network, a probe signal’s SOP can be steered by controlling a high intensity pump signal’s SOP. This effect could be applied to make a wavelength converter. Experimental results show that the degree of polarization (DOP) of a probe signal degrades according to a mathematical model found in literature. The pump and probe signals are shown to experience maximum interaction, for orthogonal probe-pump SOP vector orientations. This may be problematic to polarization mode dispersion compensators. Additionally, experimental results point out that the SOP of a probe signal is much more active in the presence of a high intensity pump, as compared to the single signal transmission scenario.
  • Full Text:
  • Date Issued: 2013

Nonlinear interactions of zinc phthalocyanine-graphene quantum dots nanocomposites: Investigation of effects of surface functionalization with heteroatoms

- Bankole, Owolabi M, Achadu, Ojodomo J, Nyokong, Tebello

  • Authors: Bankole, Owolabi M , Achadu, Ojodomo J , Nyokong, Tebello
  • Date: 2017
  • Subjects: To be catalogued
  • Language: English
  • Type: text , article
  • Identifier: http://hdl.handle.net/10962/188474 , vital:44757 , xlink:href="https://doi.org/10.1007/s10895-016-2008-8"
  • Description: This study reports the development of functional optical limiting materials composed of pristine graphene (GQDs), nitrogen-doped (NGQDs) and sulfur-nitrogen co-doped (SNGQDs) graphene quantum dots covalently linked to mono-amino substituted zinc phthalocyanine (Pc). Open aperture Z-scan technique was employed to monitor the behaviour of the conjugates under tightly focussed Gaussian laser beam using a mode-locked Nd:YAG laser delivering 10 nanosecond (FWHM) pulses at 532 nm wavelength. Nonlinear effect due to reverse saturable absorption was the predominant mechanism; and was attributed to the moderately enhanced triplet population. The major factor(s) responsible for the enhanced nonlinearities in the Pc-NGQDs and Pc-SNGQDs was fully described and attributed to the surface defects caused by the presence of heteroatoms of N and S.
  • Full Text:
  • Date Issued: 2017
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