Conveners
Applied Physics
- phil ferrer (wits)
Applied Physics
- Aletta Karsten (NMISA)
Applied Physics
- Mmantsae Diale (University of Pretoria)
Applied Physics
- phil ferrer (wits)
Applied Physics
- Shukree Wassin (student)
Applied Physics
- Timothy Gibbon (NMMU Physics Department)
Applied Physics: PHYSICS IN INDUSTRY
- Brian Masara (SAIP)
Applied Physics: PHYSICS IN INDUSTRY
- Brian Masara (SAIP)
Applied Physics
- Trevor Derry (University of the Witwatersrand)
Applied Physics
- Alan Matthews (UKZN)
Ms
Phumla Dlamini
(optical fibre research unit (nelson mandela metropolitan university))
26/06/2018, 10:00
Track F - Applied Physics
Oral Presentation
Emerging high bandwidth demanding applications such as cloud computing, 5G wireless, wearable devices for health monitoring and high definition video streaming has brought about a rapid growth of Internet traffic. This calls for upgrade of the traditional fixed grid wavelength division multiplexing (WDM) system, to improve capacity, reliability, cost and simplicity in the network through...
Dr
Lerato Shikwambana
(SANSA)
26/06/2018, 10:20
Track F - Applied Physics
Oral Presentation
Atmospheric aerosols are minute particles suspended in the atmosphere. They interact both directly and indirectly with the Earth's radiation budget and climate. The aerosol optical depth (AOD) is the most important parameter used to quantify the impact of aerosols on radiative energy budget. In this study we report on the various aerosol and cloud measurements we have carried out this far....
Prof.
Antoine Floribert Mulaba - Bafubiandi
(University of Johannebsurg)
26/06/2018, 10:40
Track F - Applied Physics
Oral Presentation
Mine fatalities, accidents and incidents are often associated with ground, roof, stope or side instability. Attenuation of rock integrity or the presence of (under)ground pockets of gases or ground waters lead to the collapse of the tunnel. Safety sensors and machine learning tools are placed in the underground mine tunnels to alert for emergencies and immediate evacuation. Numerous reported...
Ms
Xiluva Mathebula
(University Of The Witwatersrand)
26/06/2018, 11:20
Track F - Applied Physics
Oral Presentation
Textile industries are amongst the top environs of water polluters. They release complex organic pollutants (such as organic dyes) that are resistant to conventional water purification methods. Lately, TiO2-based photocatalytic degradation method has been successfully used to ravage the organic dye pollutants in aqueous medium at a low cost. However, the efficiency and turnover number of TiO2...
Mr
Victory Opeolu
(Cape Peninsula University of Technology)
26/06/2018, 11:40
Track F - Applied Physics
Oral Presentation
Laser cooling of neutral atoms is currently receiving a lot of attention worldwide due to the fact that cold atoms are promising candidates for implementation of quantum information processing elements. To cool neutral atoms, such as Rubidium and Caesium, external cavity diode lasers (ECDL) are commonly used. The laser frequency is finely tuned by adjusting the cavity length as well as the...
Mr
Shukree Wassin
(NMMU)
26/06/2018, 12:00
Track F - Applied Physics
Oral Presentation
Energy is essential for achieving sustainable growth among developing countries within Africa. Wind is regarded as one of the most promising types of renewable energy source capable of lowering the effects of greenhouse gases. Vibration monitoring and analysis is essential in the design of wind turbines due to the partially elastic structural property of the blades and because they are...
Dr
George Isoe
(Centre for Broadband Communication,Nelson Mandela University)
26/06/2018, 12:20
Track F - Applied Physics
Oral Presentation
Abstract:
Short reach optical interconnects must support higher data rates to manage the increasing needs of end users and the commensurate increase in storage and computation within and between data centres. Multimode vertical cavity surface-emitting lasers (VCSELs) and multimode fibre (MMF) links provide a power efficient solution, which is achieved in part by maximizing the data rate per...
Dr
Kessie Govender
(Cape Peninsula University of Technology)
26/06/2018, 12:40
Track F - Applied Physics
Oral Presentation
Quantum properties of light are usually characterized by the measurement of the first and second order correlation functions. These correlation functions are estimated from measurements of difference in arrival times of photons striking two single photon detectors. In this presentation, we describe the design, implementation and results of such a correlation interferometer. The device is...
Dr
Nicholas Ade
(University of the Free State)
27/06/2018, 10:00
Track F - Applied Physics
Oral Presentation
Computed tomography (CT) images of patients undergoing radiation therapy form the basis of 3D radiotherapy treatment planning. But in the presence of metallic implants, metal streak artifacts are produced in CT images which could provide inaccurate electron density information (due to incorrect Hounsfield units (HU) values) needed for accurate calculation of patient radiation dose. In this...
Mr
Elvin Chizenga
(Laser Research Center, University of Johannesburg)
27/06/2018, 10:20
Track F - Applied Physics
Oral Presentation
The use of phthalocyanines in Photodynamic Therapy (PDT) has greatly altered the difficulties associated with the treatment of cancer. PDT is a treatment modality that uses photo-physical properties of a photosensitizer (PS), in the presence of light and molecular oxygen to eradicate cancer cells. The correct choice of PS used maximizes its therapeutic potential and efficacy. This study,...
Ms
Thokozile MANAKA
(University of the Witwatersrand)
27/06/2018, 10:40
Track F - Applied Physics
Oral Presentation
ANALYSIS OF TYPE 1 DIABETES WITH MACHINE LEARNING METHODS
ABSTRACT
Big data is a term that we can use for data sets with large, diverse and complex data structures that are difficult to analyse or visualize using traditional computing methods and approaches. Health care sectors rely on interpreting data gathered from patients, which ranges from graphic scans to medical images of which...
Ms
Sharlene-Asia Naicker
(University of KwaZulu-Natal)
27/06/2018, 11:20
Track F - Applied Physics
Oral Presentation
The failure of many power transformers have been linked to the presence of an additive, Dibenzyl disulphide (DBDS) in transformer oil. The additive degrades the insulation system of the transformer resulting in untimely breakdown. Most studies have focused on laboratory oil testing, however, the interaction between DBDS and the copper windings of the transformer are still not fully understood....
Mr
Roger van Rensburg
(Wits)
27/06/2018, 11:40
Track F - Applied Physics
Oral Presentation
This research is a continuation of a security application to protect portable computer devices against theft in educational institutions of South Africa. The project is an initiative from the School of Physics with the goal of in-house development of a low-cost anti-theft system where devices require secure communication to a wireless mesh network. Hundreds of thousands of packets were...
Mr
Vincent Mokoana
(Tshwane University of Technology)
27/06/2018, 12:00
Track F - Applied Physics
Oral Presentation
Fire fighting protective garment (bunker gear) is the main shield that fire fighters use for protection against heat, flame and other hazards during fires. The bunker gear’s thermal protection is enhanced by the addition of flame retardants, which resist ignition and or reduces the rate of fire spread. Initial investigation of the bunker gear used by the City of Johannesburg EMS fire fighter...
Mr
Katlego Lentswe
(NWU)
27/06/2018, 12:20
Track F - Applied Physics
Oral Presentation
Thermal energy storage (TES) helps alleviate the mismatch between energy supply and demand by using the stored energy during peak demand periods when it is required. The two most appropriate types of TES systems for domestic applications are sensible heat and latent heat TES. Latent heat TES systems have larger thermal energy storage densities as compared to sensible heat TES systems thus...
Mr
Tjatji Tjebane
(Necsa/UP)
27/06/2018, 12:40
Track F - Applied Physics
Oral Presentation
The formation mechanism of the porous framework in nanostructured carbon materials is important in a wide variety of applications such as in supercapacitors, gas storage, adsorbents and catalyst supports etc. The accessibility to the pore sites by electrolyte ions and gases are highly determined by the precise synthesis techniques adopted for these materials. As such, biomass waste materials...
Mr
Irfan Habib
(Wits University)
27/06/2018, 14:40
Track F - Applied Physics
Oral Presentation
A new family of 2D materials called MXenes have recently been discovered, which can be synthesized from MAX phases via chemical etching of the A group elements. The properties of MXenes can be tuned by changing their terminal functional groups, and they further allow for the easy creation of thin films, increasing their versatility. Their 2D structure allows for fast redox reactions at their...
Mr
Patrick Mwonga
(University of the Witwatersrand)
27/06/2018, 15:00
Track F - Applied Physics
Oral Presentation
We report the effects of implanted molybdenum and tungsten ions on the capacitance of electrodes made from bulk molybdenum disulphide (MoS2). Six samples of crystalline MoS2, were modified by ion implanted. Three samples with Mo ions and three with W ions, at varying fluences and an acceleration voltage of 10 keV. The ion implantation process first simulated using the Stopping and Range for...
Dr
S P Tiwari
(Department of Physics University of Free State)
27/06/2018, 15:40
Track F - Applied Physics
Oral Presentation
Three samples La2O3:Er3+/Yb3+ (LEY), La2O3:Ho3+/Yb3+ (LHY) and La2O3:Er3+ (LE) were synthesized via the combustion method. Urea was used as a fuel and reducing agent. The samples were annealed at 800 oC for 4 hours in order to get good crystallization. The phase confirmation of the samples was carried out by using X-ray diffraction analysis. Surface morphology of the sample was done by field...
19.
Upconversion luminescence of NaGdF4 : Yb3+, Ho3+ phosphors for potential biomedical applications
Dr
ASHWINI SHARMA
(UNIVERSITY OF THE FREE STATE)
27/06/2018, 16:00
Track F - Applied Physics
Oral Presentation
Lanthanide ions (Ln3+) doped upconversion (UC) materials show great potential applications in optical and optoelectronic devices owing to their novel optical properties.Yb3+, Ho3+ co-doped NaGdF4 materials were synthesized by a simple co-precipitation method. Powder X-ray diffraction and X-ray photoelectron spectroscopy analysis demonstrated successful formation and incorporation of ions in...
Mr
Thendo Emmanuel Nemakhavhani
(University of Johannesburg)
27/06/2018, 16:20
Track F - Applied Physics
Oral Presentation
MinPET is a novel technology that provides the first ever high-throughput 3D quantitative imaging of locked diamonds within kimberlite rocks presented as a close packed run-of-mine stream. It is a patented technique that combines two existing technologies in a novel way. The ore is activated by an electron accelerator which produces a high-energy photon beam of some tens of MeV via...
Ms
Dina N. Oosthuizen
(CSIR and University of the Free State)
27/06/2018, 16:40
Track F - Applied Physics
Oral Presentation
The combination of nanosized cerium dioxide (CeO2) with transition metal oxides, like copper oxide (CuO), containing Ce1-xCuxO2-y, have received significant attention for their catalytic application due to their economic, environmental, and catalytically favourable properties.[1] These systems proved efficient for selective CO oxidation the water-gas...
Prof.
Odireleng Ntwaeaborwa
(University of the Witwatersrand)
28/06/2018, 10:10
Dr
M Mkhosi
(Centre for Nuclear Safety and Security, South African National Nuclear Regulator)
28/06/2018, 11:20
Dr
Darryl Naidoo
(Council for Scientific and Industrial Research)
28/06/2018, 11:45
SA National Convention Bureau
28/06/2018, 12:10
Dr
Iyabo Usman
(University of the Witwatersrand, Johannesburg.)
28/06/2018, 12:35
Mr
Khaled Mohamad
(PhD students)
29/06/2018, 10:00
Track F - Applied Physics
Oral Presentation
The solar parabolic trough collectors (PTC) are the earliest and most widely accepted solar concentration style. It is the most mature technology, has been intensively researched and its cost gradually reduced. In addition, PTC has been put into commercial operations in many countries. The research in this technology is moving towards increasing the efficiency of the system, specifically...
Dr
Mmantsae Diale
(University of Pretoria)
29/06/2018, 10:20
Track F - Applied Physics
Oral Presentation
Perovskite-based solar cells have made spectacular progress in terms of increased efficiency in the past few years. This rapid progress has created a situation where the technological advances measured by power-conversion efficiencies have proceeded much more quickly than the basic science necessary to understand working of the devices. In this presentation, discussion of gaps and possible...
Dr
Nnditshedzeni Eric Maluta
(University of Venda)
29/06/2018, 10:40
Track F - Applied Physics
Oral Presentation
Nature of adding some foreign atoms in titanium dioxide (TiO2) play a vital role in increasing its photocatalytic properties. As TiO2 has a large band gap and used in the dye sensitized solar cells, the addition of different elements stabilizes the system and shifts its absorption to the visible spectrum. Density functional theory (DFT) has been used to study a pair of dopants, introduced to...
Dr
Wynand Louw
(NMISA)
29/06/2018, 11:20
Track F - Applied Physics
Oral Presentation
The Metre Convention of 1875 established the metric scale as the universal system of measurement.
In 1960 the General Conference on Weights and Measures (CGPM), under the Metre Convention,
formally established the expanded metric scale as the International System of Units, universally
known as the SI (from the French Système international d’unités). It has subsequently been revised
from...
Mr
Graham Daniels
(Necsa)
29/06/2018, 12:00
Track F - Applied Physics
Oral Presentation
This investigation highlights the use of fast neutron radiography as a technique to determine the intrinsic properties of sand with a primary focus being determination of the sands hydraulic conductivity. The hydraulic conductivity is the ability of the sand to transmit water, the knowledge of which is of importance when planning earth storage leakages and water control structures. The...
Mr
Thapelo Mametja
(University of Capetown and National Metrology Institute of South Africa)
29/06/2018, 12:20
Track F - Applied Physics
Oral Presentation
According to International Bureau of Weights and Measures (BIPM), the International System of Units (SI) will undergo a major change in November 2018. The base units will then be based on fundamental physical constants. Currently, the kilogram is the only base unit that is still based on an artefact, a Platinum-Iridium Alloy cylinder known as the International Prototype Kilogram (IPK). All...
