2013 IEEE Global Humanitarian Technology Conference (GHTC)最新文献_第10页

Experimental results for a novel microwave radiator structure targeting non-invasive breast cancer detection 一种针对乳腺癌无创检测的新型微波辐射体结构实验结果

2013 IEEE Global Humanitarian Technology Conference (GHTC) Pub Date : 1900-01-01 DOI: 10.1109/GHTC.2013.6713681

A. Modiri, K. Kiasaleh

引用次数: 4

Non-invasive microwave breast cancer detection - A comparative study 无创微波乳腺癌检测的比较研究

2013 IEEE Global Humanitarian Technology Conference (GHTC) Pub Date : 1900-01-01 DOI: 10.1109/GHTC.2013.6713680

A. Modiri, K. Kiasaleh

{"title":"Non-invasive microwave breast cancer detection - A comparative study","authors":"A. Modiri, K. Kiasaleh","doi":"10.1109/GHTC.2013.6713680","DOIUrl":"https://doi.org/10.1109/GHTC.2013.6713680","url":null,"abstract":"Microwave-based diagnosis techniques for breast cancer detection and monitoring have gained a lot of attention due to the microwave technology's mature, safe and relatively low cost attributes. In this paper, a radiator design is studied for breast malignancy detection based on the microwave characteristics of the malignant breast. The detector was originally introduced in a recent paper published by this group. Here, the detection performance is studied when a modification is made to the design. To elaborate, the effect of having the radiator structure covered with a conductive layer is analyzed and compared with its original configuration. The radiating structure consists of sixteen curved dipole antennas attached to a low permittivity, hemisphere-shaped structure. The radiator covers the frontal section of the breast. It is clearly demonstrated here that, for a variety of tumor cases (shapes and locations), the addition of conductor cover provides a detection rate that is substantially larger than that offered by a scenario where the conductor cover is not deployed. There are also a few cases in which this conclusion is controverted. The tumor signatures are studied at 1.2GHz by calculating the changes in the electric field magnitude and phase.","PeriodicalId":168082,"journal":{"name":"2013 IEEE Global Humanitarian Technology Conference (GHTC)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134193417","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

Effect of contaminated filtration sand on performance of household biosand filters 污染过滤砂对家用生物砂过滤器性能的影响

2013 IEEE Global Humanitarian Technology Conference (GHTC) Pub Date : 1900-01-01 DOI: 10.1109/GHTC.2013.6713688

C. White, Jodi L. Sangster, Stacey R. Joy, Amanda Dunekacke, Matt Pirog, E. Jones, S. Bartelt-Hunt

{"title":"Effect of contaminated filtration sand on performance of household biosand filters","authors":"C. White, Jodi L. Sangster, Stacey R. Joy, Amanda Dunekacke, Matt Pirog, E. Jones, S. Bartelt-Hunt","doi":"10.1109/GHTC.2013.6713688","DOIUrl":"https://doi.org/10.1109/GHTC.2013.6713688","url":null,"abstract":"Household biosand filters are one point-of-use water treatment technology that can be used to provide clean drinking water to people living in communities without access to improved water supplies. There have been several studies investigating the importance of design variables on biosand filter performance, and biosand filters have been demonstrated to improve health outcomes in communities were they have been deployed. In constructing the biosand filter, it is recommended that sand from a rock quarry or gravel pit be used as filtration sand, as it is likely to be uncontaminated by waterborne pathogens. However, due to the cost or availability of sand from these sources, river sand may be used for filtration sand in a biosand filter. If the river water is contaminated with pathogens, it is likely that the sand will also be contaminated. In this study, we investigated the use of contaminated river sand on removal efficiencies of E. Coli and total coliforms from a biosand filter in the laboratory and installed in a community in Madagascar. We found that in the laboratory, the biosand filter constructed with contaminated sand had lower removal efficiencies than a filter constructed with clean sand over a 26 day period. In the field, we found that a biosand filter loaded with filtration sand obtained from a contaminated river performed well with removal efficiencies greater than 95%.","PeriodicalId":168082,"journal":{"name":"2013 IEEE Global Humanitarian Technology Conference (GHTC)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132155611","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 holistic optimization framework for improving ceramic pot filter performance 一种提高陶瓷罐过滤器性能的整体优化框架

2013 IEEE Global Humanitarian Technology Conference (GHTC) Pub Date : 1900-01-01 DOI: 10.1109/GHTC.2013.6713711

A. Servi, P. Kang, D. Frey, S. Murcott

{"title":"A holistic optimization framework for improving ceramic pot filter performance","authors":"A. Servi, P. Kang, D. Frey, S. Murcott","doi":"10.1109/GHTC.2013.6713711","DOIUrl":"https://doi.org/10.1109/GHTC.2013.6713711","url":null,"abstract":"Ceramic pot filters (CPFs) are a promising low-cost option for household water treatment, providing a barrier of protection against microbiological contaminants for households with or without reliable piped water supplies. However, as an open-source design, performance of CPFs is not standard across manufacturers and at times can be suboptimal. Furthermore, no scientific study has provided a holistic framework for optimizing filter performance. The goal of this paper is to provide CPF manufacturers with tools to increase their ability to reach performance objectives for flow rate, bacteria removal and strength. This goal is achieved by experimentally determining relationships between performance and three manufacturing parameters: percentage rice husk, rice husk size and wall thickness. These results are translated into design and manufacturing recommendations, which are as follows: 1) tightly control rice husk size to maintain consistent flow rates; 2) maximize wall thickness within the constraints in order to improve bacteria removal; 3) seek alternative methods of increasing bacteria removal if removal levels greater than 2LRV are needed. To go further and provide a more quantitative and universal optimization framework, we then use the identified functional relationships between the manufacturing parameters and filter performance to formulate a single-criterion optimization. This framework enables manufacturers to determine an ideal combination of manufacturing parameters based on the specific situation of each manufacturing site. The systematic approach to CPF design presented in this paper can be further extended to address additional manufacturing parameters and aspects of filter performance to further improve the CPF design. This work has huge potential to better serve the many people around the world who lack safe drinking water.","PeriodicalId":168082,"journal":{"name":"2013 IEEE Global Humanitarian Technology Conference (GHTC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130396289","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