IEEE Africon '11最新文献_第5页

A logic-based perspective on agent reconfiguration: Preliminary report 基于逻辑的代理重构视角:初步报告

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072131

T. Meyer, I. Varzinczak

引用次数: 0

Comparative analysis of reliability evaluation of a real distribution network in South Africa 南非某实际配电网可靠性评价的比较分析

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072161

K. Awodele, V. L. Zikalala, M. V. Harte

引用次数: 1

Scheduling the Slovenian cascaded hydro system on the river Sava 在萨瓦河上调度斯洛文尼亚级联水力系统

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072098

B. Kladnik, G. Artac, B. Kozan, A. Gubina, K. Nagode, M. Dušak

引用次数: 1

Advantage of using permutation trellis codes and M-FSK modulation for power-line communications channel 电力线通信信道中使用排列格码和M-FSK调制的优点

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072019

T. Lukusa, K. Ouahada, H. C. Ferreira

引用次数: 2

Enhancement of the voltage stability and steady state performance of the cape corridor using phase shifting transformers 用移相变压器提高海角走廊的电压稳定性和稳态性能

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072123

R. Molapo, N. Mbuli, N. Ijumba

{"title":"Enhancement of the voltage stability and steady state performance of the cape corridor using phase shifting transformers","authors":"R. Molapo, N. Mbuli, N. Ijumba","doi":"10.1109/AFRCON.2011.6072123","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6072123","url":null,"abstract":"In fully developed transmission power system, with networks overlaid with higher voltage transmission lines, power flows are predetermined by the network impedances, and generally cannot be controlled. Usually networks are developed initially using certain transmission voltages, and when lesser and lesser improvements in the transfers are realized, higher voltages are introduced. If the network that exists before higher voltage infrastructure is strong, power may choose to flow in that path, and this may lead to a serious underutilization of the newer, higher voltage lines. Phase shifting transformer can prove to be a useful tool available to the transmission system operator of the above described system to achieve improved steady state power transfer capability and voltage stability. This can be achieved when the phase shifting transformers are utilized in such a manner that the predetermined power flows are redefined to follow set transmission paths. This paper presents simulation studies performed on a network exhibiting characteristics of the system described above and proposes the phase shifting transformer to be a useful tool towards obtaining improved power system network performance.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131838708","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

Towards a contextualized pedagogy for programming education in Tanzania 坦桑尼亚程序设计教育的情境化教学法

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072010

Mikko Apiola, M. Tedre

{"title":"Towards a contextualized pedagogy for programming education in Tanzania","authors":"Mikko Apiola, M. Tedre","doi":"10.1109/AFRCON.2011.6072010","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6072010","url":null,"abstract":"Contextualization of curriculum and course contents has been central to development of IT education at Tumaini University in rural Tanzania. However, as the development of the IT program has progressed, pedagogical challenges have become increasingly evident. The pedagogical difficulties materialize most markedly in programming courses. We identified a number of sources of pedagogical difficulties: reliance on rote learning, group dynamics that support free riding, extrinsic motivations, and greatly varying educational backgrounds. In this paper we describe a pedagogical approach that utilizes the theories and principles of creative problem solving to overcome those difficulties. Firstly, we provided optimal challenges to cognitive development by switching to an open learning environment, and we adapted course arrangements accordingly. Secondly, we encouraged intrinsic motivation and sense of autonomy by increasing the amount of affective support. Thirdly, we encouraged reflective learning processes by introducing a new concept of coding-while-lecturing. Fourthly, we stimulated the positive aspects of group work and promoted individual learning by providing adaptable multi-level exercises.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114403542","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: 8

Optimal pricing of telecomm services in a developing country: A game theoretical approach 发展中国家电信服务最优定价:一个博弈论方法

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072082

M. Sumbwanyambe, A. Nel, W. Clarke

引用次数: 7

Characterizing long memories in electric water heater power consumption time series 电热水器耗电时间序列的长记忆表征

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072104

X. Ye, X. Xia, Jiangfeng Zhang, Yangquan Chen

引用次数: 5

Piezoelectric sensor array with evaluation electronic for counting grains in seed drills 播种机粒数评价用电子压电传感器阵列

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6072063

S. M. Z. Hoberge, U. Hilleringmann, C. Jochheim, M. Liebich

引用次数: 9

Coupled interference based rate adaptation in ad hoc networks 自组网中基于耦合干扰的速率自适应

IEEE Africon '11 Pub Date : 2011-11-10 DOI: 10.1109/AFRCON.2011.6071984

F. Awuor, Karim D Djouani, G. Noel, T. Olwal, P. Leclair

{"title":"Coupled interference based rate adaptation in ad hoc networks","authors":"F. Awuor, Karim D Djouani, G. Noel, T. Olwal, P. Leclair","doi":"10.1109/AFRCON.2011.6071984","DOIUrl":"https://doi.org/10.1109/AFRCON.2011.6071984","url":null,"abstract":"Link adaptation provides an efficient and flexible strategy to adapt transmission rates based on channel conditions. To attain distributed optimal local and global utility, network interference need to be mitigated therein allowing the users to transmit at the minimum transmission power enough to sustain connectivity. This paper proposes coupled interference network utility maximization (NUM) strategy (i.e., CIN) for rate adaptation in WLANs that is solved using “reverse-engineering” based on Karush-Kuhn-Tucker (KKT) conditions. In that way, users determine data rates based on their local link observations (i.e., coupled interference). Both pricing and limited message passing mechanisms are employed in the NUM so that pricing restrict users from self-interest behaviours while limited message passing assists users to announce their prices and transmit powers. It is demonstrated theoretically that CIN satisfies the conditions of the super-modular games, thereby resulting in an optimal solution. Simulation results have shown that adapting data rates based on the link conditions can improve the performance of ad hoc networks for both stationary and mobile users.","PeriodicalId":125684,"journal":{"name":"IEEE Africon '11","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126276801","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