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A pattern based tokenization model for XML parsing on mobile devices 用于移动设备上XML解析的基于模式的标记化模型
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757818
Geerish Suddul, N. Nissanke, N. Mohamudally
{"title":"A pattern based tokenization model for XML parsing on mobile devices","authors":"Geerish Suddul, N. Nissanke, N. Mohamudally","doi":"10.1109/AFRCON.2013.6757818","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757818","url":null,"abstract":"This paper presents a theoretical tokenization model for XML parsing on resource constrained mobile devices. The model is based on the identification of sequentially repeating patterns within the structure of an XML document. As soon as it identifies a repeating structure, it relieves the parser from the computationally intensive conventional tokenization process, and focuses on extracting text node based values for further processing by the calling application. Our experiments demonstrate that the proposed tokenization model considerably relieves the processing bottlenecks encountered in conventional XML parsers.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133536243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
A DSP-enhanced AC susceptometer for characterisation of superconductors 一种用于超导体表征的dsp增强型交流电纳计
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757691
S. S. Babet, A. Jarvis
{"title":"A DSP-enhanced AC susceptometer for characterisation of superconductors","authors":"S. S. Babet, A. Jarvis","doi":"10.1109/AFRCON.2013.6757691","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757691","url":null,"abstract":"This paper explains the design and implementation of a low-cost susceptometer. Much emphasis is laid on the implementation of a software-based lock-in amplifier as an alternative for an analogue based lock-in amplifier for the susceptomer's signal processing. The lock-in amplifier acts as a discriminating voltmeter measuring the inphase and the out-of-phase susceptibilities at a reference frequency, from a noisy environment, of high temperature superconducting samples. From susceptibility measurements, important parameters such as critical temperature and critical current were determined.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133472891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Highly parallel implementation of Sphinx-3 voice recognition algorithm Sphinx-3语音识别算法的高度并行实现
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757669
Dimitris Tsiamasiotis, I. Papaefstathiou, C. Manifavas
{"title":"Highly parallel implementation of Sphinx-3 voice recognition algorithm","authors":"Dimitris Tsiamasiotis, I. Papaefstathiou, C. Manifavas","doi":"10.1109/AFRCON.2013.6757669","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757669","url":null,"abstract":"General-purpose computing on graphics processing units (GPGPU) has been an active area of scientific research in recent years. Most of the research efforts are based upon the Compute Unified Device Architecture (i.e. CUDA), introduced by Nvidia and targeting its products. In this work, the features of the abovementioned technology are exploited to produce a highly parallel implementation of the Sphinx 3 voice recognition algorithm. Our goal was to improve the execution time of the decoder, in specific. Execution times achieved indicate that it is indeed possible to speed up the algorithm even if the vast majority of the code cannot be run in parallel.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132162426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A SAT-based approach to solve the faculty course scheduling problem 一种基于sat的教学排课方法
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757599
F. Aloul, I. Zabalawi, A. Wasfy
{"title":"A SAT-based approach to solve the faculty course scheduling problem","authors":"F. Aloul, I. Zabalawi, A. Wasfy","doi":"10.1109/AFRCON.2013.6757599","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757599","url":null,"abstract":"The faculty course scheduling problem is concerned with assigning time slots to courses while taking into consideration some departmental and university constraints and instructor preferences. The problem also aims at optimizing the performance criteria and distributing the courses evenly among the available time slots. The problem is a classic scheduling problem and has received some research during the past few years due to its wide use in academic institutions. Most of the proposed solutions were based on local search techniques. In this paper, we present a complete approach to solving the course scheduling problem using Boolean Satisfiability (SAT). Experimental results show the effectiveness of the proposed approach.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132448975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
The MAP in LC concept for MTR decoding in multiple-head magnetic recording systems 多磁头磁记录系统中MTR译码的LC中的MAP概念
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757845
N. Djuric, V. Šenk
{"title":"The MAP in LC concept for MTR decoding in multiple-head magnetic recording systems","authors":"N. Djuric, V. Šenk","doi":"10.1109/AFRCON.2013.6757845","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757845","url":null,"abstract":"The constrained capability of maximum-transitionrun (MTR) codes are well known in magnetic recording systems. Unfortunately, these codes possess just a modest error correcting ability and thus they have to be used in combination with proven and powerful error correcting codes. In modern, iterative decoding framework, two decoders exchange soft-information, in order to improve their decisions. Thus, the utilization of MTR codes in such framework requires some approaches for their soft-decision decoding. Recently, the MAP in LC method is proposed for such purpose, enabling propagation of soft-values through the MTR decoder. Substantial benefits have been noticed when the MAP in LC was used in a one-track MTR encoded E2PR4 magnetic recording channel. In this paper, performance and benefits of the MAP in LC, along with its two subversions, are considered over a multiple-track E2PR4 channel, encoded by the in-track MTR code. In case of the low-level inter-track interference, the subversion named as max-log MAP in LC shows nearly 0.85 dB of decoding gain, for BER = 10-5, when 4/5 (2, 8) MTR code was used.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127798167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The future of nanoelectronics is black: From silicon to hexagonal carbon 纳米电子学的未来是黑色的:从硅到六方碳
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757838
U. Schwalke
{"title":"The future of nanoelectronics is black: From silicon to hexagonal carbon","authors":"U. Schwalke","doi":"10.1109/AFRCON.2013.6757838","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757838","url":null,"abstract":"Silicon has been the ultimate semiconductor material in micro- and nanoelectronics for more than 50 years. However, the use of pure silicon based devices will come to an end when CMOS downscaling will soon reach its physical limits. In order to gain performance, new materials with high carrier mobility are required. Hexagonal carbon seems to be a promising alternative to build high performance electronic devices. For example, carbon nanotube field-effect transistors (CNTFETs) can be used as active devices in integrated circuits and as memory cells. More recently, another hexagonal carbon modification became the focus of scientific attention: graphene. Just a few years after the Nobel Prize Award in 2010 for the graphene discovery, graphene-based transistors are emerging as other potential candidates to extend and eventually replace the traditional silicon MOSFET. This contribution will give a brief overview on the recent progress achieved in carbon-based nanoelectronics.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131321368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Engendering an e-safety awareness culture within the South African context 在南非背景下建立电子安全意识文化
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757708
E. Kritzinger, Keshnee Padayachee
{"title":"Engendering an e-safety awareness culture within the South African context","authors":"E. Kritzinger, Keshnee Padayachee","doi":"10.1109/AFRCON.2013.6757708","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757708","url":null,"abstract":"Children are an extremely vulnerable sector of society and are exposed to information and communication technology (ICT) usage risks without being given the proper tools they need to navigate this minefield. It is imperative that children are educated about all risks associated with the prolonged and improper usage of mobile phones and computers. These risks are not purely technological, but may also influence their physiological, psychological and sociological wellbeing. All four dimensions have to be considered holistically to ensure the safe usage of ICTs as well as engendering an e-safety culture among ICT users within the South African context. This paper primarily focuses on the protection of minors as end users (and possible victims) of ICTs. This entailed identifying the various stakeholders that should be involved in educating children about the risks in using ICTs and delineating their responsibility to inform and protect themselves and the children who are under their supervision. Given that educators at primary school level are the key role-players in disseminating e-safety information, this paper proposes a revision of extant curricula. The paper concludes by providing an overview of a possible framework to engender an e-safety culture among all relevant role-players and an application thereof.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"67 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115776523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Entry-level additive manufacturing: Comparing geometric complexity to high-level machines 入门级增材制造:将几何复杂性与高级机器进行比较
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757608
M. Lotz, H. Pienaar, D. Beer
{"title":"Entry-level additive manufacturing: Comparing geometric complexity to high-level machines","authors":"M. Lotz, H. Pienaar, D. Beer","doi":"10.1109/AFRCON.2013.6757608","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757608","url":null,"abstract":"Not only has the entry-level additive manufacturing (ELAM) market grown at a remarkable rate over the last few years, but combined overall performance of these machines has improved. This enterprise gained publicity with two open-source projects and has grown to several available commercial systems found in the world today. The article will update the progress made in additive manufacturing (AM) with respect to the selected entry-level 3D printer's geometrical performance. It will also compare the results with different ELAM systems, and finally with an industrial AM system. The aim is to update the printing performance of ELAM systems.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114600615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Periodic signal frequency tracking via a shifted second-order generalized integrator 基于移位二阶广义积分器的周期信号频率跟踪
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757752
G. Fedele, A. Ferrise, C. Picardi
{"title":"Periodic signal frequency tracking via a shifted second-order generalized integrator","authors":"G. Fedele, A. Ferrise, C. Picardi","doi":"10.1109/AFRCON.2013.6757752","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757752","url":null,"abstract":"Second-order generalized integrators have been extensively used for the frequency estimation of periodic input signal. In this paper a novel structure is proposed by considering two additional parameters into the estimation scheme. This results in frequency tracking processes that sensibly attenuate overshooting phenomena affecting the classical approaches. Moreover an opportune choice of such parameters makes the scheme more robust in presence of unaccounted noises. The convergence in case of generic periodic input signal is discussed.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114911760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Survey on mobile phone battery end-life in Tanzania 坦桑尼亚手机电池寿命调查
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757653
M. Tedre, Veronica Chuma, Mikko Apiola
{"title":"Survey on mobile phone battery end-life in Tanzania","authors":"M. Tedre, Veronica Chuma, Mikko Apiola","doi":"10.1109/AFRCON.2013.6757653","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757653","url":null,"abstract":"Tens of tons of mobile phone batteries and other mobile technology are imported in Tanzania every year. It is, however, still unclear what happens to mobile devices in the end of their life cycle. This study combined qualitative and quantitative methods to explore what happens to mobile batteries after their useful lifespan. The study found that one third of the respondents threw away their used mobile phone batteries, while most other respondents re-used batteries or kept them at home. There was very little indication of recycling activities, and knowledge about used mobile device recollection was uncommon. This study found little or no connection between environmental awareness and age, education, gender, or other demographic variables: habits of waste disposal remained the same across demographics.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"2010 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116946975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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