Browsing Faculty of Engineering by Author "10196978 - Hoffman, Alwyn Jakobus"
Now showing items 1-20 of 23
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Activity-based risk management for the acquisition of electronic mine safety equipment
Van der Merwe, G.P.R.; Holm, J.E.W.; Hoffman, A.J. (SAIMM, 2017)A new approach is proposed to perform relativistic comparisons between alternative operational risk management solutions by taking into account the impact of each operational activity on overall system performance. ... -
Analysis of the post-earnings announcement drift anomaly on the JSE
Swart, D.J.; Hoffman, A.J. (Taylor & Francis, 2013)The post-earnings announcement drift anomaly has been widely researched and confirmed for several markets around the world. This paper investigates the relationship between the earnings surprise as reflected by the price ... -
Application of data analytics to transport corridor diagnostics and performance benchmarking
Hoffman, Alwyn J.; Venter, W.C. (IEEE, 2018)Increase in exports is essential for economic growth in developing countries. In Southern Africa the development of effective multi-national trade corridors is the single biggest stumbling block to achieve this objective. ... -
Characterization and modelling of a customs operation
Hoffman, A.J. (NWU, 2018)Effective risk management is a prerequisite to find an acceptable balance between the objectives of a customs operation and the streamlined flow of goods. This requires the use of well-designed customs risk management models ... -
Combining different computational techniques in the development of financial prediction models
Hoffman, A.J. (SCITEPRESS, 2014)The prediction of financial time series to enable improved portfolio management is a complex topic that has been widely researched. Modelling challenges include the high level of noise present in the signals, the need to ... -
A comparison of TTF and RTF UHF RFID protocols
Hoffman, Alwyn; Holm, Johann; Marais, Henri-Jean (Wiley, 2010)This chapter focuses only on aspects related to the choice of a suitable protocol. While a brief overview will be provided of RFID protocols in general, the main focus is on the challenges to find a suitable protocol for ... -
Designing a new methodology for customs risk models
Hoffman, Alwyn; Grater, Sonja; Venter, Willem C.; Maree, Juanita; Liebenberg, David (CCES, 2019)Effective risk management is a prerequisite to find an acceptable balance between the objectives of a customs operation and the streamlined flow of goods. The customs operations in many developing countries are characterised ... -
Development of a model for road transport fuel management
Hoffman, A.J. (SAIIE, 2016)Road transport is responsible for 76% of cargo movement in South Africa; at the same time transport cost in Sub-Sahara Africa forms a much higher fraction of the total cost of landed goods compared to the rest of the world. ... -
An explorative study into the effectiveness of a customs operation and its impact on trade
Hoffman, Alwyn J.; Venter, Willem C.; Grater, Sonia; Maree, Juantia; Liebenberg, David (CCES, 2018)There is a lack of overall efficiency in Sub-Saharan Africa’s logistics systems, with a large contributor to this problem being inefficient customs processes and unnecessary customs delays. Many comparisons have been ... -
Geometry based analysis of an alternative RFID interrogator placement for electronic vehicle identification
Hoffman, Alwyn Jakobus; Pretorius, Albertus; Wang, Yifan (IEEE, 2015)This paper proposes a solution for reliable in-traffic electronic vehicle detection based on UHF passive RFID (ISO/IEC 18000-63 - UHF Type C). The classic overhead placement of an interrogator reading a windscreen or plate ... -
Impact of a radio-frequency identification system and information interchange on clearance processes for cargo at border posts
Bhero, Ernest; Hoffman, Alwyn; Lusanga, Kabanda; De Coning, Arno (AOSIS, 2015)Background: Improved operational efficiency is important to role players in cross-border logistics and trade corridors. Cargo owners and cargo forwarders have been particularly concerned about long delays in the processing ... -
An intelligent freight corridor overload control system
Hoffman, Alwyn J.; De Coning, Arno (IEEE, 2014)Overload control is an important aspect of freight corridors in developing countries that largely depend on road transport to move goods between ports and areas of production and consumption. As the frequent weighing ... -
An investigation into the economics of fuel management in the freight logistics industry
Hoffman, Alwyn J.; Van der Westhuizen, Marius; Naidoo, Jitesh (IEEE, 2014)The transport and logistics industry has to confront many challenges to achieve the objective of efficient distributed operations, such as vehicle and cargo traceability and security. Research has identified effective ... -
Kalman Filter based RFID tag velocity estimation in the presence of frequency hopping
Bester, Nico-Paul; Hoffman, Alwyn (IEEE, 2019)This paper compares different techniques for estimating the velocity of UHF RFID tags within practical applications. We use COTS RFID equipment complying with ISO18000-6C standards, including the use of frequency hopping, ... -
A low cost circularly polarized microstrip patch antenna with low axial ratio for UHF RFID applications
Naidoo, Sheridan J.; Hoffman, Alwyn; Bhero, Ernest; Kumar, Pradeep (IAMOT, 2020)This paper presents a low cost circularly polarized microstrip patch antenna with low axial ratio (AR) and broad AR beam width for ultrahigh frequency (UHF) radio-frequency identification (RFID) applications. The ... -
Neural models for benchmarking of truck driver fuel economy performance
Hoffman, Alwyn J. (INSTICC, 2019)The transport industry is a primary contributor towards emissions that impact climate change. Fuel economy is also of critical importance to the profitability of road freight transport operators. Empirical evidence identified ... -
Parameter analysis of the Jensen-Shannon divergence for shot boundary detection in streaming media applications
De Klerk, M.G.; Venter, W.C.; Hoffman, A.J. (SAIEE, 2018)Shot boundary detection is an integral part of multimedia, be it video management or video processing. Multiple boundary detection techniques have been developed throughout the years, but are only applicable to very ... -
Securing number plates based on digital signatures and RFID
Hoffman, Alwyn J.; Geldenhuys, Daniel J.S.; Pretorius, Albertus B. (IEEE, 2013)The automated detection of vehicles forms an important part of Intelligent Transportation Systems. The vehicle number plate is the primary token used for the identification of the vehicle; the number plates industry is ... -
A simulation strategy to optimize the design of internet enabled logistics services
Lusanga, P.K.; Hoffman, A.J.; De Coning, A.; Bhero, E. (IEEE, 2014)The emergence of advanced communication technology has created opportunities to improve transportation in supply chains across the globe. In this paper the main contributors to inefficiencies in present road transportation ... -
SmartRoad: a new approach to law enforcement in dense traffic environments
Hoffman, Alwyn Jakobus; Pretorius, Albertus J. (IEEE, 2015)Road transport law enforcement is facing new challenges against the background of increasingly congested traffic conditions. An ideal law enforcement system must enable authorities to detect, identify and act against illegal ...