Asian Transactions on Basic & Applied Sciences
Volume: 02, Issue: 04, September 2012
Title: Characterization of Non-Opaque Minerals and Naturally Occurring Radionuclides. In Sediments of Osun River, Southwestern Nigeria
Author(s): Oyebanjo O.A, Joshua E.O., Jibiri N.N.
Paper ID: ATBAS-50201046
Pages: 1 - 13
Abstract: Non opaque minerals such as zircon, Tourmaline, rutile, staurolite, epidote. Garnet and silimanite are identified in 25 locations of Osun River basin by gravity separation method using chloroform and slide examination on microscope. The naturally occurring radionuclides (238U, 232Th and 40K) and the associated hazard indices are determined by Gamma ray spectroscopic technique. The results obtained for the radium equivalent activity and the external hazard index showed that the sediment samples were within the UNSCEAR international recommended limits of 370 Bq kg-1 and 1 respectively.
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Title: The Role of Pumice in Self-Compacting Lightweight Aggregate Concrete Manufacture
Author(s): Moch. Syaiful Anwar, Andika Widya Pramono, Vera Indrawati Judarta, Azwar Manaf
Paper ID: ATBAS-40218040
Pages: 14 -20
Abstract: In this decade the self-compacting lightweight aggregate concrete (SCLWAC) is produced using Ordinary Portland Cement Type I, but relatively few SCLWAC produced using a PCC (Portland Cement Composite) cement. This article discusses the role of pumice as lightweight coarse aggregate in the manufacture of SCLWAC, in which PCC acts as a matrix and pumice act to reduce concrete's density. As many as 39 trial performed to obtain mix design of self-compacting concrete. From 39 mix-trial obtained three mix-trial that have self-compacting properties. From three mix-trial selected only one the best mix-SCLWAC based on compressive strength and density at 28 days. A 0.32 kg/m3 polyvinyalcohol (PVA) fibers added in the selected mix-SCLWAC (Mix D) and then casted in cubes and cylinders mold for three times repetition. These curing time is 3, 7, and 28 days. After curing times, these samples tested compressive strength, splitting tensile strength, modulus of elasticity which refers to ACI 318 and Scanning Electron Microscope (SEM). The results show that ligthweight pumice aggregate has been successfully utilized in the manufacture of SCLWAC exhibiting good properties of fresh concrete and hardened concrete, and a 0.32 kg/m3 PVA fiber in Mix D SCLWAC decreased compressive strength and modulus of elasticity, but it increase splitting tensile strength.
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Title: A Ratio-dependent Predator-prey System with Quadratic Predator Harvesting
Author(s): K. Saleh
Paper ID: ATBAS-10227043
Pages: 21 - 25
Abstract: This paper deals with dynamical properties of a four-parameter ratio-dependent predator-prey system with quadratic predator harvesting. We prove that all solutions of the system are uniformly bounded. We also show that the system has at most two equilibria in the interior of the first quadrant and can exhibit numerous kinds of bifurcation phenomena, including Bogdanov-Takens bifurcation, the supercritical Hopf bifurcations, transcritical and saddle-node bifurcations. Hence, the system may have an unstable periodic orbit, or a homoclinic loop, or a saddle point, or a stable focus, depending on the parameter values. Compared to the model with no harvesting, these results present richer dynamics.
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Title: Construction and Characterization of a Pyranometer Using Locally Available Materials For Global Solar Radiation Measurement
Author(s): Nwankwo S. N, Nnabuchi M. N and Ekpe J.E
Paper ID: ATBAS-50219043
Pages: 26 - 33
Abstract: The high cost and maintenance of imported equipment for solar radiation measurement makes the equipment a scarce commodity in Meteorological and Research Centers in Nigeria and other Developing Countries in the world. In order to alleviate this problem, a pyranometer for global solar radiation measurement was therefore developed locally at Ebonyi State University, Abakaliki. The pyranometer consists of Photodiode, electrical wires, transparent plastic material and a digital multimeter. The calibration of the constructed pyranometer was done on a clear sky day, Thursday 18th August, 2011. The calibration constant for the Eistrain Lungs Pyranometer, Spektron-100(GN01-30-93) Reference Pyranometer is 7.3 x 10-5VW-1m-2. Hence, using the average output of the Reference and Constructed pyranometers for two hours (12:00pm to 2:00pm) on sunny that day 18th August, 2011, 55.39mV and 49.46mV respectively. The calibration constant of the Constructed Pyranometer was obtained as 6.58 x 10-5VW-1m-2. The maximum irradiances of 895.70W/m2 and 1043.83W/m2 were recorded with the Constructed and Reference Pyranometers respectively and these occurred on 06/09/2011. We are happy to remark that there was no significant difference between the performances of the Constructed and the Reference pyranometers.
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Title: Economic Analysis of Bunaken Nasional Park Ecotourism Area Based on the Carrying Capacity and Visitation Level
Author(s): Adrian Pangemanan, Maryunani, Luchman Hakim, Bobby Polii
Paper ID: ATBAS-40228044
Pages: 34 - 40
Abstract: Tourism is one source of revenue to government. Many authorities have been exploring and developing their tourism potentials, especially the natural based tourism. Any development should take into account the carrying capacity of the region under development to provide quality service while conserving the nature. We have carried out a study to analyze economically the ecotourism resort of Liang beach in the Bunaken National Park (BNP) in North Sulawesi, Indonesia. Analysis was conducted on the carrying capacity of the region and visit rates due to changes in admission fee to the resort. The BNP existing condition has not been developed optimally and the tourism activities have not been oriented for environmental conservation. With purposive sampling method, 80 park visitors who came from various zones of origin were selected. The carrying capacity of the region (CCR) was measured directly with the help of Google earth. The results of the study: 1. The diving area of 88 hectares is capable of accommodating 3520 tourists per week; 2. The snorkeling area of 1 ha can accommodate 67 people; 3. The boating activity with a line path of 3866 m can hold 928 people; 4. The beach with a 1176-m-coastal-line is capable of accommodating 118 people. Overall, the BNP can accommodate 4,633 people per week. In the demand side, the Zonal Travel Cost Model approach (ZTCM) shows the potential of visitors from various surrounding areas of origin an average 1890 people. Through a simulation on tariff change during holidays (demand during holidays) and during the working days (demand during working days) it was concluded that the resort still has an appeal to increase the limited carrying capacity of the region. An appropriate management policy to increase revenue is expected.
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Title: An Analytical Study of fly ash for five Varieties of naturally grown plants: Sodium Content
Author(s): Ghalib A. Atiya
Paper ID: ATBAS-60220042
Pages: 41 - 45
Abstract: We demonstrated in this study, that the sodium contents of the fly ash of five varieties of plants. We demonstrated that the ash contents depends on the variety of the plants include Schanginia Aegyptiaca (Scha.), Alhagi A. maurorum (Alhagi.), Dichrostachys cinerea syn. Dichrostachys glomerat (Dichrosta.), Eucalyptus (Euca.) and Date palm tree (D.Palm). Flame photometry technique was used to analyze the sodium contents of such naturally grown plants in Diyala province agriculture lands. The sodium contents shows there are big variations between seasonal grown plants compeered with those long life one taken in this work the halophytic plant show tremendously high content of sodium in its ash.
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Title: A Study on Empowerment Partner Model in Fishing Community in City of Bengkulu, Sumatra, Indonesia
Author(s): Syafrudin Abu Bakar, Sahri Muhammad, Maryunani and Nuhfil Hanani
Paper ID: ATBAS-50229046
Pages: 46 - 50
Abstract: Proper utilization of resources plays an important role in improving life standard of a community. We have studied the influence of the characteristics of the fishing capitals for the successful of partnership model of a fishing community empowerment in the City of Bengkulu. We conducted interviews to 170 respondents comprising of general coastal and fishing communities. The data was analyzed using SEM (Structural Equation Modeling) with AMOS version 4.01. The results show the capital characteristics influencing the fishing community life are (in sequence from the highest): human capital (1.028); marine resource capital (1.027), microfinance institutions (1.007); institutional access (1.000); facilities and infrastructure (0.999); economy (0.998); culture (0.859) and social (0.682). We found that the capital characteristics of the fishing community have a positive influence on the successful model of a fishing community empowerment partnership in the City of Bengkulu.
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