Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014)最新文献_第2页

Using Game-Based approach to enhance language learning for preschoolers in Tanzania 运用游戏教学法加强坦桑尼亚学龄前儿童的语言学习

Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014) Pub Date : 2014-07-14 DOI: 10.1109/SCAT.2014.7055145

C. A. Ongoro, J. Mwangoka

引用次数: 11

Spectrum Difference Function technique for measuring velocity 测量速度的谱差函数技术

Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014) Pub Date : 2014-07-14 DOI: 10.1109/SCAT.2014.7055120

Thanh T. Nguyen, J. Devlin, D. Elton, G. Deng, E. Custovic

{"title":"Spectrum Difference Function technique for measuring velocity","authors":"Thanh T. Nguyen, J. Devlin, D. Elton, G. Deng, E. Custovic","doi":"10.1109/SCAT.2014.7055120","DOIUrl":"https://doi.org/10.1109/SCAT.2014.7055120","url":null,"abstract":"In radar applications, target velocity is commonly determined using the Doppler effect. By comparing the transmit-receive differential frequency the Doppler frequency shift can be measured and as a result the target velocity can be determined. The Tasman International Geospace Environment Radars (TIGER) form part of an international network of similar HF radars called Super Dual Auroral Radar Network (SuperDARN) which explore the impact of solar disturbances on Earth by monitoring the location of aurora and related phenomena occurring in the ionosphere. These radars utilise an Auto Correlation Function (ACF) to measure the changing phase of the ACF between lag times to determine the Doppler frequency and the target velocity. This paper presents a novel method to measure Doppler shifts with high resolution and accuracy in radar applications. In the proposed method, a comparison of the transmit and receive signal spectrums is performed to determine the Spectrum Difference Function (SDF). It is shown that the gradient of SDF in the vicinity of the carrier frequency is proportional to the target Doppler shift. Therefore, by examining the SDF, the target velocity can be detected with a high level of accuracy.","PeriodicalId":315622,"journal":{"name":"Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116602460","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

Application of side-wall deposition and etch-back technology for nanometer scale device integration 侧壁沉积与反蚀技术在纳米级器件集成中的应用

Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014) Pub Date : 2014-07-14 DOI: 10.1109/SCAT.2014.7055128

U. Hilleringmann, F. Vidor, F. Assion

引用次数: 2

Proactive approaches to audit pedestrian safety locations, a model for developing countries 积极主动地审核行人安全地点，这是发展中国家的典范

Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014) Pub Date : 2014-07-14 DOI: 10.1109/SCAT.2014.7055123

D. Chimba

{"title":"Proactive approaches to audit pedestrian safety locations, a model for developing countries","authors":"D. Chimba","doi":"10.1109/SCAT.2014.7055123","DOIUrl":"https://doi.org/10.1109/SCAT.2014.7055123","url":null,"abstract":"This paper presents a pedestrian safety hotspot analysis to identify and prioritize specific road segments and intersections with high crash locations using Geographic Information System (GIS) which can be applied in sub-Saharan countries. The approach can well be applied in developing countries which are coupled with high traffic accident rates and injury severities. The identification process uses GIS environment through Getis-Ord Gi-star hotspot analysis tool. The goal is to examine the existence of a spatial pattern for pedestrian crashes associated with roadway geometry, socioeconomic, population distribution and other related factors. This methodology ranks high crash locations based on: crash frequency; weighted crash frequency by injury severities (EPDO); crash rates calculated per vehicle miles of travel (VMT), total population, and mean household income within a defined boundaries. The identified high crash locations and the rankings enable agencies to properly invest and prioritize funds to improve safety. It assists in identifying suitable locations for safety audits.","PeriodicalId":315622,"journal":{"name":"Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121922504","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

Effect of varying filler-size in profile injection attacks on the Robust Weighted Slope One 剖面注入攻击中不同填料尺寸对鲁棒加权斜率1的影响

Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014) Pub Date : 2014-07-14 DOI: 10.1109/SCAT.2014.7055125

Newton Masinde, S. Fatima

{"title":"Effect of varying filler-size in profile injection attacks on the Robust Weighted Slope One","authors":"Newton Masinde, S. Fatima","doi":"10.1109/SCAT.2014.7055125","DOIUrl":"https://doi.org/10.1109/SCAT.2014.7055125","url":null,"abstract":"The use of recommender systems have become the de-facto standard in e-commerce systems. The most popular recommendation techniques are the collaborative filtering techniques. Their open nature of collaborative recommender systems however allow attackers who inject biased profile data to have an impact on the recommendations produced. The standard memory-based collaborative filtering algorithms, such as k-nearest neighbor, have been shown to be quite vulnerable to such attacks. In this paper, we examine the robustness of model-based recommendation algorithms in the face of profile injection attacks. Specifically, two recommendation algorithms under the Slope One class of algorithms, namely, Weighted Slope One and Improved Slope One, are considered. Additionally, we propose a modified Slope One based algorithm which we call the Robust Weighted Slope One (RWSO) algorithm. Empirically, we show that the Robust Weighted Slope One performs better under profile injection attacks. We also show that the Improved Slope One performs poorly under pre-attack conditions contrary to expectations.","PeriodicalId":315622,"journal":{"name":"Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115538257","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

A knowledge management model for pediatric health care practice 儿童卫生保健实践的知识管理模型

Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014) Pub Date : 2014-07-14 DOI: 10.1109/SCAT.2014.7055134

P. Mutuwa, Gilbert Maiga

引用次数: 2

Channel capacity with channel interference in MIMO-WLAN systems MIMO-WLAN系统中信道容量与信道干扰

Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014) Pub Date : 2014-07-14 DOI: 10.1109/SCAT.2014.7055129

Chien-Hung Chen, Chia-Ying Yu, Wei-Siang Gu, C. Chiu, Shu-Han Liao

引用次数: 0

Verification of pavement marking degradation models using eastern tennessee pavement marking retroreflectivity data 利用田纳西州东部路面标线反射率数据验证路面标线退化模型

Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014) Pub Date : 2014-07-14 DOI: 10.1109/SCAT.2014.7055137

M. Onyango, D. Malyuta, Joseph Owino, D. Chimba

{"title":"Verification of pavement marking degradation models using eastern tennessee pavement marking retroreflectivity data","authors":"M. Onyango, D. Malyuta, Joseph Owino, D. Chimba","doi":"10.1109/SCAT.2014.7055137","DOIUrl":"https://doi.org/10.1109/SCAT.2014.7055137","url":null,"abstract":"Pavement markings are lines/markings drawn on pavement surface to provide vital information to road users pertaining to lane restrictions and vehicle movements, which if adhered to, results into improved road users' safety. For the pavement markings to be useful they ought to be reflective. Pavement markings retroreflectivity is a measurement of how well the markings can be seen by road users, especially at night. Pavement marking retroreflectivity is measured in milli-candela per square meter per lux (mcd/m2/lux). Candela is a measurement of light intensity and lux is measurement of luminous light per square meter. The USA Federal Highway Administration (FHWA) in the Manual on Uniform Traffic Control Devices (MUTCD) recommends minimum retroreflectivity levels on different types of pavements. Pavement markings retroreflectivity degrade as a function of time, environmental condition and number traffic repetition after its application. There have been several studies that were conducted to establish trends and time it takes for pavement markings to stay above the threshold. Some of the studies published degradation models. This paper seeks to verify the published pavement marking degradation models using pavement retroreflectivity data collected from East Tennessee. The models selected for verification are published by Lee et. al., Aboud and Bowman , Sarasua et. al., and Sitzabee at. al. From these models, the model by Abboud and Bowman for white paint pavement markings had the highest R2; other models have published R2 values that are larger than what was obtained from this study. The model by Lee et..al., had a published R2 value similar to what was obtained from this study.","PeriodicalId":315622,"journal":{"name":"Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014)","volume":" 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120832933","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

Radiation Safety of handheld mobile phones 手持移动电话的辐射安全

Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014) Pub Date : 2014-07-14 DOI: 10.1109/SCAT.2014.7055148

K. Michael

引用次数: 2

Official use of social network sites by African universities 非洲大学正式使用社交网站

Proceedings of the 2nd Pan African International Conference on Science, Computing and Telecommunications (PACT 2014) Pub Date : 2014-07-14 DOI: 10.1109/SCAT.2014.7055135

F. Otto, S. Williams

引用次数: 4