Conveners
Applied Physics
- phil ferrer (wits)
Applied Physics
- phil ferrer (wits)
Applied Physics
- There are no conveners in this block
Applied Physics
- There are no conveners in this block
Applied Physics
- There are no conveners in this block
Applied Physics
- There are no conveners in this block
Applied Physics
- There are no conveners in this block
Applied Physics
- There are no conveners in this block
Applied Physics: Physics In Industry Day
- Iyabo Usman (University of the Witwatersrand, Johannesburg.)
Applied Physics: Division Meeting
- phil ferrer (wits)
Mr
thokozane mlotshwa
(saip and nitherp)
09/07/2019, 10:00
Track F - Applied Physics
Oral Presentation
The sun is the most important source of renewable energy today. Producing energy from sunlight using cheap, abundant and non-toxic materials is considered a major challenge in the field of solar-electrical energy conversion. To harvest the solar energy, a thin film solar cell composed of the Cu2ZnSnS4 (CZTS) semiconductor is a candidate which can harvest as much energy as possible. Its...
Ms
THOKOZILE MANAKA
(LESOTHO)
09/07/2019, 10:20
Track F - Applied Physics
Oral Presentation
Big data is a term used for data sets with large, diverse and complex structures that are often quite difficult to analyze or visualize using traditional computing methods and approaches. Machine learning (ML) techniques are effective in analyzing these types of data and extracting information from these types of data. Large sets of data are generated by health care systems from record keeping...
Mr
CLARENCE VUSI MABASO
(STUDENT)
09/07/2019, 10:40
Track F - Applied Physics
Oral Presentation
The photocatalytic water oxidation activity of hematite (α-Fe2O3) has been greatly enhanced by incorporating hematite nanoparticles on the reduced graphene oxide (rGO) nanosheets. Photoelectrochemical measurement results show that coupling the hematite nanoparticles with the rGO greatly increases the photocurrent and reduces the charge recombination rate. Transient absorption spectroscopy and...
Prof.
yohannes abate
(The University of Georgia)
09/07/2019, 11:20
Track F - Applied Physics
Oral Presentation
Metasurfaces control light propagation at the nanoscale for applications in both free-space
and surface-confined geometries. However, dynamically changing the properties of metasurfaces can be a major challenge. Here we demonstrate a reconfigurable hyperbolic
metasurface comprised of a heterostructure of isotopically enriched hexagonal boron nitride
(hBN) in direct contact with the...
Dr
Olanrewaju Wojuola
(North-West University)
09/07/2019, 11:40
Track F - Applied Physics
Oral Presentation
It is commonly believed that inductive kick or back electromotive force (EMF) generated by a coil depends on the magnitude of its inductance. This, intuitively, is in line with Faraday’s law of electromagnetic induction. This work seeks to show that this is not necessarily the case. Starting from basic principles, this work presents a theoretical analysis which shows that the back EMF...
Mr
Clemens Dempers
(Blue Stallion Technologies, Centre for Transport Development, Industrial & Systems Engineering, University of Pretoria, South Africa)
09/07/2019, 12:00
Track F - Applied Physics
Oral Presentation
The South African beer industry encourage customers to return empty 750ml beer bottles to retailers and receive a refund for recycled bottles. These bottles are then re-used, but after multiple cycles the bottles eventually exhibit visual signs of scuffing – an opaque ring at the base and sometimes shoulder of the bottle. Scuffing is correlated to bottle explosions during the refilling...
Mr
Tesfaye Gonfa
(University of Pretoria)
09/07/2019, 12:20
Track F - Applied Physics
Oral Presentation
Synechocystis PCC6803 (Synechocystis) are species of Cyanobacteria capable of oxygenic photosynthesis. Phycobilisomes (PBs) are large peripheral light-harvesting antenna complexes located on the thylakoid membrane. PBs absorb light and transfer the energy to the reaction centers of Photosystem I and II. An intact PB contains a total of 396 pigment-protein complexes. A single pigment-protein...
Dr
Kessie Govender
(Cape Peninsula University of Technology)
09/07/2019, 12:40
Track F - Applied Physics
Oral Presentation
Cold neutral atoms are currently being used in many areas of quantum information processing, such as single photon sources, entangled photon generation, quantum simulations involving cold atoms in optical lattices, etc. Atoms are cooled using a device incorporating laser cooling together with magnetic trapping called a magneto-optical trap (MOT). We describe in this presentation the basic...
Mr
Monphias Vumbugwa
(Nelson Mandela University)
10/07/2019, 10:00
Track F - Applied Physics
Oral Presentation
Thermal infra-red (TIR) imaging is a fast and inexpensive technique for detecting defects in Photovoltaic (PV) modules in large-scale solar PV plants. Abnormalities in the current-voltage (I-V) curve of a module string can be indicative of an underperforming module in the string. The physical location of this fault can only be identified by performing electrical measurements on each module in...
Dr
Ross Schultz
(nmu)
10/07/2019, 10:20
Track F - Applied Physics
Oral Presentation
With the challenge of supplying electricity to rural regions in South Africa, where the logistical cost of installing a utility line is not economically viable, photovoltaics (PV) for power generation offers a solution to rural electrification. However, pervious pilot projects executed by government and private institutes utilized only DC systems for electrification in typical “solar home...
Mr
Mnoneleli Govuzela
(Nelson Mandela University)
10/07/2019, 10:40
Track F - Applied Physics
Oral Presentation
Remote area power systems that are based on renewable energy sources have proven to be an effective way of providing energy and improve livelihoods in remote rural areas. However, the stochastic behaviour of renewable energy sources (i.e. solar) and consumption by energy users leads to a mismatch between generation and consumption. To mitigate these effects, energy storage systems such as...
Dr
phil ferrer
(wits)
10/07/2019, 11:20
Track F - Applied Physics
Oral Presentation
Solar receivers in solar trough installations are crucial components for transferring the incident solar radiation to a working fluid as heat, which can be used for industrial applications or electricity generation. Losses as thermal radiation dominate at high temperature and must be minimised in an efficient system. Conventionally, this is achieved via a selective coating on the absorber...
Mr
Khaled Mohamad
(Witwatersrand University)
10/07/2019, 11:40
Track F - Applied Physics
Oral Presentation
The solar parabolic trough collector is amongst the most mature solar technologies and becomes more cost-effective in recent years. We build on our previous work on hot mirrors to study an absorber with a mirrored cavity. The cavity absorber for the parabolic trough receiver is designed to reflect solar radiation back onto the absorber very efficiently, which would otherwise be lost. We built...
Dr
Ross Schultz
(NMU)
10/07/2019, 12:00
Track F - Applied Physics
Oral Presentation
Photovoltaics (PV) has been recognized as one of the major renewable energy sources for utility-scale power generation in South Africa that can potentially meet the shortfall in generation, which ESKOM currently cannot provide. However, to assure the maximum energy yield for a given PV system within a deployed climatic region, long-term reliable performance data of the various technologies...
Dr
Frederik Vorster
(NMMU)
10/07/2019, 12:20
Track F - Applied Physics
Oral Presentation
The use of the Light Beam Induced Current (LBIC) measurement technique to study the spatial distribution of performance-limiting defects in photovoltaic (PV) cells is well established. The point-by-point current-voltage (I-V) measurements that are measured when scanning a light beam across a PV cell are used to extract and map comparative device and performance parameters qualitatively. The...
Mr
ANESU CHITURA
(UNIVERSITY OF FORT HARE)
10/07/2019, 12:40
Track F - Applied Physics
Oral Presentation
In order to observe PV characteristics, there is need for highly sophisticated and expensive equipment. These characteristics inform the user by offering a review of the state of the photovoltaic (PV) system under different weather conditions. PV Array Current-Voltage (I-V) measurements require skilled personnel, expensive equipment and isolation circuitry, which may be intricate and...
Mr
Ross Dix-Peek
(NMMU)
10/07/2019, 14:00
Track F - Applied Physics
Oral Presentation
Electroluminescence (EL) imaging has been utilised in qualitative characterisation of photovoltaics devices since 2005. It has been utilised quantitatively to determine individual cell voltages, as well as individual cell electrical parameters. However, there has been limited work on the development of an analysis technique that combines both the individual cell voltages as well as the local...
Dr
Eric Maluta
(UNIVEN)
, Mr
Livhuwani Masevhe
(UNIVEN)
10/07/2019, 14:20
Track F - Applied Physics
Oral Presentation
To deal with the shortage in electricity and high diesel costs affects the pumping requirements of community water supplies and irrigation; so using solar energy for water pumping is an alternative to conventional electricity and diesel based pumping systems. Solar water pumping is based on photovoltaic (PV) technology that converts solar energy into electrical energy to run a DC or AC motor...
Mr
DUKE OEBA
(University of South Africa)
10/07/2019, 14:40
Track F - Applied Physics
Oral Presentation
Nanocrystalline silicon detectors show radiation sensing at a faster response and high ratios of photo detectivity which are qualities that are desired for radiation detection. In this research, nanocrystalline silicon was grown and characterized to determine its structural, morphological and elemental composition. A comprehensive review of the temperature dependence of current-voltage (I-V)...
Dr
Solomon Uriri
(Center for Quantum technology, University of KwaZulu-Natal)
10/07/2019, 15:00
Track F - Applied Physics
Oral Presentation
Metamaterials are artificial engineered periodic structures with exceptional optical properties that are not found in conventional materials. As a result of the material unique optical properties, new ways of controlling and manipulating light at the nanoscale is now possible. Thus, leading to many applications most particularly to quantum communication and information processing. Other...
Mr
Moment Mahlangu
(University of Cape Town)
10/07/2019, 15:40
Track F - Applied Physics
Oral Presentation
Department of Physics, University of Cape Town
At UCT, positron imaging techniques are used to investigate systems of flow for science and engineering applications. As an example, positron emission tomography (PET) measurements are performed of the distribution of liquid in 2D flowing foams to investigate bubble coalescence in mineral froth flotation. The impact of the results and the...
Mr
Mpho Gift Doctor Gololo
(Witwatersrand University)
10/07/2019, 16:00
Track F - Applied Physics
Oral Presentation
A major upgrade to the High Luminosity Large Hardon Collider (HL-LHC)will increase the instantaneous luminosity by a factor 5 compared to the LHC.A complete redesign of the electronic system is required for new radiation lev-els, data bandwidth as well as the clock distribution. A large amount of dataacquired from the detector requires high-throughput electronics for accuratedata...
Mr
Edward Nkadimeng
(University of the Witwatersrand)
10/07/2019, 16:20
Track F - Applied Physics
Oral Presentation
We present the design of an upgraded switching power supply for the front-end electronics of the ATLAS hadron TileCal (Tile Calorimeter) at the LHC. The new design features significant improvements in noise, improved fault detection, and improved reliability, while retaining the compact size, water-cooling, output control, and monitoring features. We discuss the steps taken to test the quality...
Mr
Sizwe Mhlongo
(University of the Western Cape)
10/07/2019, 16:40
Track F - Applied Physics
Oral Presentation
The Neutron Activation Analysis technique is one of the most reliable techniques that can be used to analyze various materials in all phases (solid, liquid and gaseous). According to literature, the technique (when using the traditional approach of employing thermal neutrons) is sensitive to about 78 elements of the periodic table, and can be used to simultaneously analyze up to 35 elements....
Ms
Dlamini Phumla
(Nelson Mandela University)
11/07/2019, 10:00
Track F - Applied Physics
Oral Presentation
Flexible spectrum has been proposed as a spectrally efficient networking technology that effectively supports dynamically varying traffic demands. With the Wavelength division multiplexing (WDM) optical networks ability to provide increased capacity and efficient spectral resource utilization it can be used to reserve channels to improve the quality of service in big data transmission. Optical...
Mr
sibusiso nqayi
(ufs)
11/07/2019, 10:20
Track F - Applied Physics
Oral Presentation
In this work we seek to understand the role played by the shape and size of co-catalyst nanoclusters on the semiconductor surface optical properties. The preparation of nanocomposites is of high importance in science and engineering. These are usually prepared with chemical methods and in this work we also try to counter the role played by solvents in the preparation of these structures. This...
Dr
Nonhlanhla Precious Maphaha
(National Metrology Insitute of South Africa)
11/07/2019, 10:40
Track F - Applied Physics
Oral Presentation
All calibrations of thermometers for meteorological or climatological applications are based on the International Temperature Scale of 1990, ITS-90. Based on the best science available in 1990, ITS-90 specifies procedures which enable cost-effective calibration of thermometers worldwide. In this paper we discuss the impact for meteorology of two recent developments: the forthcoming 2019...
Mr
Murendeni Nemufulwi
(CSIR/UFS)
11/07/2019, 11:20
Track F - Applied Physics
Oral Presentation
Various volatile organic compound (VOCs) gases are released from a wide range of products commonly found in buildings resulting in indoor environmental pollution thus posing risks to human health. Much attention has been dedicated on development of spinel-type ferrites as gas sensors for detection of VOCs gases and environmental monitoring. However, the growing demand of highly responsive,...
Prof.
Antoine Antoine F. Mulaba-Bafubiandi
(University of Johannesburg)
11/07/2019, 11:40
Track F - Applied Physics
Oral Presentation
Response surface methodology optimization of adsorption and kinetics of Ca removal from aqueous solution using macadamia nutshell biochar
Antoine F. Mulaba – Bafubiandi, Reason Sithole and Sobowale Sunday Samuel
Mineral Processing and Technology Research Center, Department of Metallurgy, School of Mining , Metallurgy and Chemical Engineering, Faculty of Engineering and The Built...
Mr
Vinvent Mokoana
(Tshwane University of Technology and City of Johannesburg EMS)
11/07/2019, 12:00
Track F - Applied Physics
Oral Presentation
Firefighters are constantly exposed to open flames and extreme heated conditions during fires and as a result use firefighting protective clothing (bunker gear) for protection. Firefighting protective clothing derives its heat withstanding strength from the flame retardants added in the manufacturing process. However, some flame retardants, including chlorinated and brominated flame...
Mr
Kamanda Janvier
(University of Johannesburg)
11/07/2019, 12:20
Track F - Applied Physics
Oral Presentation
Many different fueling materials are used in the smelting of aluminum as used by rural foundry men in rural communities in South Africa. One lists namely coal, firewood, cow dung, and macadamia nutshells. While emission and heat radiation generated due to a poor heat containment leading to a possible biodiversity degradation environment pollution and contribution to climate change, a...
12/07/2019, 10:00
Track F - Applied Physics
Oral Presentation
12/07/2019, 10:40
Track F - Applied Physics
Oral Presentation
12/07/2019, 11:20
Track F - Applied Physics
Oral Presentation
Prof.
Simon Connell
(University of Johannesburg)
12/07/2019, 12:00
Track F - Applied Physics
Oral Presentation
