发布求助
文献互助 智能选刊 最新文献

2013 Africon最新文献

筛选
英文 中文
A case study in automated GUI generation for multiple devices 为多个设备自动生成GUI的案例研究
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757645
David Raneburger, R. Popp, Jürgen Falb, Barbara Weixelbaumer, Nicole Mirnig, A. Weiss, M. Tscheligi, B. Ratzer
{"title":"A case study in automated GUI generation for multiple devices","authors":"David Raneburger, R. Popp, Jürgen Falb, Barbara Weixelbaumer, Nicole Mirnig, A. Weiss, M. Tscheligi, B. Ratzer","doi":"10.1109/AFRCON.2013.6757645","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757645","url":null,"abstract":"Model-driven generation of Graphical User Interfaces (GUIs) is desirable, since it potentially allows to save time and effort in comparison to manual development. Current state-of-the-art GUI generation approaches support fully automatic GUI generation for different devices, but the usability of the resulting GUIs is typically rather low. This work presents the development and heuristic evaluation of two automatically generated GUIs for a small bike rental application, one for a desktop PC and one for a smartphone, in form of a case study. To improve the usability of such automatically generated GUIs, we considered a set of usability heuristics already during the model-driven development of the application. The results of the subsequently performed heuristic evaluation show that the consideration of usability heuristics in the first iteration of a model-driven development process allows to ensure a basic level of usability. However, they also underline that manual customization is inevitable for achieving high quality GUIs.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"143 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":"132401297","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
Coordinated Multipoint transmission for LTE-Advanced networks in dense informal settlements 密集非正式住区LTE-Advanced网络的协调多点传输
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757791
B. B. Haile, E. Mutafungwa, Jyri Hämäläinen
{"title":"Coordinated Multipoint transmission for LTE-Advanced networks in dense informal settlements","authors":"B. B. Haile, E. Mutafungwa, Jyri Hämäläinen","doi":"10.1109/AFRCON.2013.6757791","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757791","url":null,"abstract":"The emerging Long Term Evolution-Advanced (LTE-A) standard promises improvements in throughput, latency, spectrum-flexibility and reduction in costs-per-bit, through use of techniques, such as, coordinated multipoint (CoMP) transmission and reception. LTE-A enhancements provide an attractive long-term solution for operators to implement cost-effective capacity-upgrades and guarantee affordable broadband access in the emerging markets (e.g., Africa). The fast expanding densely-populated informal settlements are among the key areas that could benefit from this new technology. This paper presents a simulation study on the spectral efficiency gains that are achievable with CoMP transmission in an exemplary dense informal settlement area. The results demonstrate that use of CoMP provides capacity enhancements without need for costly deployment of additional macro sites, thus contributing to affordability of broadband access through reduced cost-per-bit. Moreover, we note possible improvements in energy efficiency, by lowering transmit powers without significant impact on CoMP spectral efficiency gains.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"20 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":"127918357","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: 5
Joint source channel decoding of circular non binary turbo codes 圆形非二进制turbo码的联合源信道译码
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757737
Y. Beeharry, T. P. Fowdur, K. Soyjaudah
{"title":"Joint source channel decoding of circular non binary turbo codes","authors":"Y. Beeharry, T. P. Fowdur, K. Soyjaudah","doi":"10.1109/AFRCON.2013.6757737","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757737","url":null,"abstract":"Non binary turbo codes are gaining a lot of attention since the recent adoption of duo binary circular turbo codes by the Digital Video Broadcasting (DVB) community. In this paper, a Joint Source Channel Decoding (JSCD) scheme is proposed for circular non-binary turbo codes. With a view to exploit a-priori probabilities from source statistics, a symbol level trellis is incorporated into the circular trellis of the non-binary turbo decoder. Reversible Variable Length Codes (RVLC) are used as the input source in all simulations. Results show that with JSCD, circular duo binary turbo codes provide an average gain of 0.4 dB at Bit Error Rate (BER) of 10-5 as compared to conventional decoding of circular duo binary turbo codes. With circular triple binary turbo codes, JSCD provides a striking average gain of 3.5 dB at a BER of 10-6 compared to conventional decoding of circular triple binary turbo codes.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"8 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":"129271898","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
Design of a contactless battery charging system 一种非接触式电池充电系统设计
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757758
K. N. Mude, M. Bertoluzzo, G. Buja
{"title":"Design of a contactless battery charging system","authors":"K. N. Mude, M. Bertoluzzo, G. Buja","doi":"10.1109/AFRCON.2013.6757758","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757758","url":null,"abstract":"Inductive contactless energy transfer systems (CETS) transfer electric energy between their input and output section without any wired connection. The coupling device consists of two coils whose setup is a crucial issue in building up a CETS. This paper presents the design procedure of the coils of a CETS intended to charge the battery pack of electric city car. The procedure encompasses the determination of the inductive parameters of the coils when ferrite cores with different geometries are considered. Topology and sizing of the power inverter supplying the transmitter coils are also addressed. The results of the numerical analysis are validated by the outcomes of finite element method and power circuit simulation simulations.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"81 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":"126410301","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: 12
Spectrum estimation using new efficient 2-D AR lattice modeling of random fields 利用新的高效二维AR随机场晶格模型进行频谱估计
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757705
Erdogan Camcioglu, A. H. Kayran
{"title":"Spectrum estimation using new efficient 2-D AR lattice modeling of random fields","authors":"Erdogan Camcioglu, A. H. Kayran","doi":"10.1109/AFRCON.2013.6757705","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757705","url":null,"abstract":"In this paper, the new efficient 2-D autoregressive (AR) lattice modeling technique of random fields is applied to predict the reflection parameters of the 2-D AR data field and the spectrum estimation is carried out. In addition, the AR coefficients of the data field generated as the sum of 2-D complex sinusoids corrupted by additive complex Gaussian noise are predicted and its spectrum is estimated. The results are compared with the classical 2-D FFT-based estimates. The new efficient 2-D (AR) lattice modeling technique is newly presented and based on employing the auxiliary vertical and horizontal prediction error fields. The aim of this method is to obtain simultaneously all possible types of causal and noncausal 2-D models for an arbitrary rectangular shape of the prediction support region. The obtained causal quarter-plain models are mostly found stable.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"10 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":"126430781","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: 5
A novel wireless sensor network test bed sensor node 一种新型无线传感器网络传感器节点试验台
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757641
Joubert G. J. Krige, M. J. Grobler, H. Marais
{"title":"A novel wireless sensor network test bed sensor node","authors":"Joubert G. J. Krige, M. J. Grobler, H. Marais","doi":"10.1109/AFRCON.2013.6757641","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757641","url":null,"abstract":"The constrained nature of sensor node (SN) power sources limits the power consumption of a wireless sensor network (WSN). The energy efficiency of WSNs is therefore of great importance. In this paper a novel SN which was specifically designed for use in WSN test beds is presented. The design addresses shortcomings in existing SN hardware used in test bed environments. Each node is capable of measuring its own power consumption as well as remaining battery capacity. The SN design includes a battery charger to assist with node redeployment. Each SN is modular and can support a wide array of sensors and transceivers. Application areas include WSN test beds, data collection, automation and education. SN power consumption data are also presented.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"24 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":"125710986","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
Cyber-physical systems networking with TCP/IP: A security application approach 使用TCP/IP的网络物理系统网络:一种安全应用方法
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757652
M. Svéda, R. Vrba
{"title":"Cyber-physical systems networking with TCP/IP: A security application approach","authors":"M. Svéda, R. Vrba","doi":"10.1109/AFRCON.2013.6757652","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757652","url":null,"abstract":"This paper deals with an approach to security analysis of IP-based computer networks for cyber-physical applications. The method developed stems from a formal model of network topology with changing link states, and deploys bounded model checking of network security properties supported by SAT-based decision procedure. Its implementation consists of a set of tools that provide automatic analysis of router configurations, network topologies, and states with respect to checked properties.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"43 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":"115214641","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: 2
The mutual effect of virtualization and parallelism in a cloud environment 虚拟化和并行性在云环境中的相互影响
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757700
S. S. Zaghloul
{"title":"The mutual effect of virtualization and parallelism in a cloud environment","authors":"S. S. Zaghloul","doi":"10.1109/AFRCON.2013.6757700","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757700","url":null,"abstract":"Cloud computing is a dominant technology nowadays in both industry and academia. It evolved from many concepts such as distributed processing and parallel computing. In addition, virtualization is the core of cloud computing since it facilitates live migration for the sake of load balancing. The ultimate result is the optimization of resources utilization and increase in the whole system's performance. Moreover, virtualization plays an important role in achieving disaster recovery plans. Furthermore, virtual machines secure the underlying physical hardware against malware. However, parallel computing is of no less importance, especially to cloud platforms. Consequently, contemporary laptops, mobile and hand-held devices manufacturers produce multicore equipment with the aim of achieving high performance levels when these become nodes in a cloud environment. However, what is the mutual effect of virtualization and parallel processing? Do they impede each other? Do they really boost the overall performance collectively? This research helps to better understand the effect of virtualization on parallel processing. In addition, this paper covers some researches made to answer such questions. Such studies are so few - to the extent of our knowledge - that they don't give comprehensive answers to the previously imposed questions. Finally, a methodology is exposed to quantitatively measure the mutual effect of parallelism and virtualization in a cloud environment.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"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":"115852224","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
Modified backoff technique with transmission priority scheme in fiber-wireless networks 光纤无线网络中传输优先方案的改进退避技术
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757760
W. Hassan, Horace L. King, Shabbir Ahmed, M. Faulkner
{"title":"Modified backoff technique with transmission priority scheme in fiber-wireless networks","authors":"W. Hassan, Horace L. King, Shabbir Ahmed, M. Faulkner","doi":"10.1109/AFRCON.2013.6757760","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757760","url":null,"abstract":"The convergence of optical and wireless technologies hold great promise for the development of future broadband access networks. As such, we work on the idea of integrating the gigabits passive optical network (GPON) with wireless local area network (WLAN) to realize fiber-wireless networks. We focused on techniques to improve the end user WLAN performance by utilizing the interoperability of these two networks. In this paper, the fairness between the uplink and the downlink transmission for the IEEE 802.11a WLAN in the fiber-wireless networks is investigated. A simple fairness index is introduced as the comparison metric. Our proposed scheme showed promising results as it maintains an almost unity fairness index irrespective of the traffic load. This performance is achieved by reducing the constant contention window size of the access point to one fourth of its original size. The approach gives a higher transmission priority to the access point considering the fact it carried more load than its associate wireless users.","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":"115962401","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
Assessment of daily exposure in the broadband continuous monitoring system — SEMONT 宽带连续监测系统- SEMONT的每日暴露评估
2013 Africon Pub Date : 2013-09-01 DOI: 10.1109/AFRCON.2013.6757844
N. Djuric, D. Kljajić
{"title":"Assessment of daily exposure in the broadband continuous monitoring system — SEMONT","authors":"N. Djuric, D. Kljajić","doi":"10.1109/AFRCON.2013.6757844","DOIUrl":"https://doi.org/10.1109/AFRCON.2013.6757844","url":null,"abstract":"The Serbian electromagnetic field monitoring network - SEMONT, has recently started taking initial broadband continuous measurements of electromagnetic (EM) field in surrounding environment. The SEMONT system is designed to perform daily observations of EM field sources present in the area covered by sensors network. The measurement results are collected and stored into a centralized database of EM field register and will be used to timely inform the public on real-time level of EM field and to determine the potential exposure of the general population, in accordance to the Serbian legislation and ICNIRP recommendations. An approach for the assessment of daily exposure limits, regarding the high-frequency electric field, is considered in this paper as a solution for the EM field broadband monitoring system - SEMONT.","PeriodicalId":159306,"journal":{"name":"2013 Africon","volume":"116 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113961442","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: 11
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信