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Author(s): Rodrigo Braga Moruzzi, Ademir Pacelli Barbassa, Thaís Helena Prado Corrêa, Lorena Avelina Rojas Gutierrez, Bernardo Arantes. do Nascimento Teixeira
Pages: 1-6 Paper ID:137206-1402-8989-IJCEE-IJENS Published: April, 2014
Abstract:The present study aimed to evaluate the risk of Aedes aegypti proliferation in structures used in compensatory techniques for urban drainage (Best Management Practices-BMPs). These drainage structures are utilised to reduce flood peaks due to surface runoff, and they have been used in many countries. However, many of these structures have been designed to keep water surfaces exposed for a certain period of time, depending on the type of project. Exposed water surfaces may become an ideal environment for A. aegypti proliferation in tropical and subtropical areas where the rainy season occurs during the summer. Thus, data regarding the mosquito life cycle, consecutive rainfall pattern and emptying time of these structures were collected. A comparison of these data led to the evaluation of the associated risk of A. aegypti proliferation in BMP structures. The risk of mosquito proliferation ranged from 1.1% to 3.3%, depending on the rainfall pattern, A. aegypti life cycle phase and BMP activity.
Keywords: Aedes aegypti; Best Management Practices; urban drainage.
Full Text (.pdf)  International Journals Of Engineering and Sciences | 439 KB
Author(s): Rini Kusumawardani, Kabul Basah Suryolelono, Bambang Suhendro, Ahmad Rifa’i
Pages: 7-12 Paper ID:143402-7878-IJCEE-IJENS Published: April, 2014
Abstract:In this study, the author suggests the behavior of sandy soil due to the application of difference of loading and also frequency of loading applied. Both of these parameters implied some differences effects. Three types of loading were applied, there are the loading gradually increased, gradually decreased and also loading until 100 cycles. Based on the testing results, it can be understood that liquefaction is achieved when the soil sample in saturated condition and then applied the gradually increased type of loading with minimum frequency of loading equal 0,1 Hz. Parameters such as density relative, frequency of loading applied and type of loading contribute an occurrence to the soil to be liquefy.
Keywords: Sandy soil, dynamic loading, frequency of loading, cyclic triaxial testing.
Full Text (.pdf)  International Journals Of Engineering and Sciences | 742 KB
Author(s): Rasul M. Khalaf, Raad H. Irzooki, Saleh J. S. Shareef
Pages: 13-27 Paper ID:142602-3737-IJCEE-IJENS Published: April, 2014
Abstract:The main purpose of traditional spillway with semicircular crest is to rise and control upstream (U/S) water level. In this study a new performance was added to this spillway, by making it as an energy dissipater. In order to study the energy dissipation percent (?E/E0) %, the face of traditional spillway was making stepped three times as (Ns= 3, 5 and 7). Twenty four experiments were performed in a laboratory horizontal channel of 12 m length, 0.5 m width and 0.45 m depth for a wide range of discharge. Water surface profile and piezometric head distribution were studied over a traditional and stepped spillway of semicircular crest. The experimental results of the study of flow on traditional spillway show that an increase in (Y0/Hc) and (Fr2) value causes an increase in (?E/E0)%, furthermore an increase in (Y1/Hc) value causes decreasing in (?E/E0)% value. While, the experimental results of the study on stepped spillway show that an increases in (Y0/Hc) and (Y1/Hc) value causes an increase in (?E/E0)% , and an increase in the roughness Froude number (F*) value causes decreasing in (?E/E1)% value. Two empirical equations were established for calculating the dissipation energy. Index Term-- Hydraulic structures; Traditional and stepped spillway; Energy dissipation.
Keywords: ---
Full Text (.pdf)  International Journals Of Engineering and Sciences | 1,040 KB
Author(s): Chia-Song YEN , I-Hsien TING, Tien-Hui YEH, Chia-Sui SUN
Pages: 28-33 Paper ID:147002-9393 IJCEE IJENS Published: April, 2014
Abstract:This study aimed to explore ways of present Taiwan's digital broadcasting (Digital Audio Broadcasting; DAB) used in distance learning by new residents in Taiwan. Taiwan's new residents migrated to the new environment, different cultures stimulation and better educational environment were required, but the media they use are not conductive to them. New residents in Taiwan mostly live in non-urban areas, so they need information communication tools (Information Communication Technologies, ICTs) to get better education. In this study, in-depth interviews were required, and the case study found that digital broadcasting is not only new residents itself has an educational function, but also make up the education gap for their children. But because of the political reason and high device price, distance learning by the way of DAB still left behind the actual demand.
Keywords: DAB, digital audio broadcasting, education, information communication technologies, new residents, distance-learning.
Full Text (.pdf)  International Journals Of Engineering and Sciences | 204 KB