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Geoelectric Method for Investigating Saltwater Intrusion Into Freshwater Aquifer In Deghele Community Of Warri South Local Government Area Of Delta State

Author(s):Egbai, J. C, Efeya Pius
Journal: Technical Journal of Engineering and Applied Sciences
Publisher:Science Explorer Publications
Abstract
| Pages: 819-827
A geophysical investigation was been conducted using the Vertical Electrical Sounding (VES) by adopting the Schlumberger array in Deghele Community, Warri South West Local Government Area of Delta State to study the saltwater intrusion into the subsurface freshwater aquifer. Seven vertical electrical sounding were carried out. Qualitative interpretation of Vertical Electrical Sounding (VES) data revealed five to six layers, HAA, QHKA, HAK, HK, KQH and HKQ type curves. The geoelectric section delineates geoelectric layers which include saline topsoil with thickness ranging from 1.2m to 3.9m, Silty sand with thickness ranging from 2.4m to 21.6m, Sand (saline) with thickness ranging 7.9m to 50m and sand (coarse grain) with thickness ranging from 37m to 50m. These are in agreement with the lithology from borehole logs in the study area. Analysis of borehole water samples indicate that VES6 and VES7 location have high level of Chlorine and bicarbonate having ratio of chloride to bicarbonate (Cl- /HCO3-- >2) greater than 2 which is a criteria for recognition of seawater in groundwater.

Preparation and Characterization of modified sawdust and its application for the removal of Methyl Orange dye: Kinetic, Isotherm and Real sample studies

Author(s):Shahla Elhami, Shahnaz Karami
Journal: Technical Journal of Engineering and Applied Sciences
Publisher:Science Explorer Publications
Abstract
| Pages: 828-833
Sawdust modified by diethylenetriamine and used as an adsorbent. The structural and morphological study of the synthesized composite was then carried out by fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The adsorption characteristics of the modified sawdust were examined by using Methyl Orange dye as an azo anionic dye. Langmuir and Freundlich isotherms were employed for the study of the adsorption of Methyl Orange onto modified sawdust. Adsorption kinetics of Methyl Orange onto the modified sawdust followed the pseudo-second-order kinetic model. The method was applied for the removal of Methyl Orange in different water samples.

Comparability of Aquifer Transmissivity between Abavo (Hinterland) and Okwagbe (Coastal Region), Delta State, Nigeria.

Author(s):Egbai, J.C
Journal: Technical Journal of Engineering and Applied Sciences
Publisher:Science Explorer Publications
Abstract
| Pages: 834-841
A geoelectric survey involving twenty-seven vertical electrical soundings was carried at Abavo and Okwagbe both in Delta State, Nigeria in order to determine the groundwater potential and to compute and compare the transmissivity of aquifer in the two communities. The Schlumberger electrode configuration was adopted with a maximum current separation of 800m. A total of 27 VES were carried out, 12 from Abavo and 15 from Okwagbe locations. The result was interpreted quantitatively and quantitatively in terms of a lithologic and geohydrologic model of the subsurface. The geoelectric investigation reveals that three to seven were obtained within the two communities. The results show an average aquifer transmissivity of 196m2/day for Abavo while 295m2/day for Okwagbe was computed which are good for sedimentary region. Locations 9 and 2 at Abavo have aquifer transmissivity of 548m2/day and 418m2/day respectively while locations 2, 10and 13 have 541m2/day,519m2/day and 504m2/day respectively for Okwagbe. These five locations of the studied area have been demarcated as having good groundwater potentials in the two communities. There exist no difference in terms of aquifer transmissivity between the coastal region and the hinterland.

Reviewing the impact of macro economic factors on operating cost stickiness in Tehran stock exchange

Author(s):Zahra Poorzamani, Mohammadreza Bakhtiary
Journal: Technical Journal of Engineering and Applied Sciences
Publisher:Science Explorer Publications
Abstract
| Pages: 842-850
This research review impact of macro economic factors (Inflation rate, short term interest rate, long term interest rate) on operating cost stickiness of companies listed in Tehran stock exchange. For this on base on elimination method 91 firms were chosen and needed data were extracted from the firms and central bank for hypothesis test. Revenue, inflation rate, short term interest rate, long term interest rate and dummy variable as independent variables and operating cost stickiness as dependent variable using multi variable linear regression were tested. This research has done base on annual observation (2007-2012).results show there is negative meaningful relation between inflation rate and operating cost stickiness and it can be said with increasing inflation rate, operating cost stickiness of firms decrease and also there is positive meaningful relation between short term interest rate and operating cost stickiness and it can be said with increasing short term interest rate, operating cost stickiness of firms increase. But there is no meaningful relation between long term interest rate and operating cost stickiness and it can be said long term interest rate doesn’t have meaningful impact on operating cost stickiness of active firms in Iran stock market.

Strategic Analysis of Iranian Seaports Using ANP and SWOT Models

Author(s):Mohammad dehdari, Hassan Jafari, Farough Raissi
Journal: Technical Journal of Engineering and Applied Sciences
Publisher:Science Explorer Publications
Abstract
| Pages: 851-858
Strategic analysis is the first and most important component of strategic management process which requires identification and analysis of an organization’s internal strengths and weaknesses as well as its external opportunities and threats. A lot of techniques can be applied to analyze strategic matters among which SWOT matrix is highly famous and reputable. One the most important weaknesses of SWOT analysis are that the importance of each factor for decision making cannot be quantitatively evaluated. In other words, it is to some extent difficult to identify which factor or group is more effective in strategic decisions. Analytical Hierarchy Process removes the mentioned problem. Importance, weight and priority of each factor are quantitatively estimable via AHP model. But) when there is the independence and dependence between the factors this approach (AHP loses its efficiency. So we need a tool that can takes into account and measure possible interdependence between factors. One of the most appropriate methods to solve these shortcomings is analytical network process which can applied even when there is dependence among the SWOT factors to drive well. Aim of This research is to analyze and prioritize strengths, weaknesses, opportunities and threats of Iran’s commercial ports (In terms of transit), by use of SWOT and ANP models. Firstly, having analyzed the internal and external environments, strengths, weaknesses, opportunities and threats were identified. Then SWOT matrix was formed by merging the mentioned components and then four strategies developed. Finally by applying ANP model, priority and importance of each group and subgroup and strategy was determined. The obtained results show that SO strategy has the most and WT have the least importance and priority.

Role of agricultural cooperatives in accessing to sustainable productivity and creating job opportunities in rural regions (Case study: South-Khorasan Province- east of Iran)

Author(s):Farhood Golmohammadi, Ahmad Kahromi, Hojjat Khademi Nezhad, Yalda Honari, Elham Isfahani, Mahmood Kazemi
Journal: Technical Journal of Engineering and Applied Sciences
Publisher:Science Explorer Publications
Abstract
| Pages: 859-876
The decision by the United Nations to declare 2012 as the International Year of Co- operatives will increase the global focus on cooperatives. The UN points to the role of cooperatives, of many kinds, in promoting participation in the economic and social development of all people. cooperatives provide the opportunity for poor people to raise their incomes; they are democracies empowering people to own their own solutions; they increase security for the members; and they contribute directly and indirectly to primary education for children, gender equality and reducing child mortality. Agriculture and rural cooperatives are generally considered as a tool for rural development. Many developed countries such an England, France, German and United Stated largely depend on incomes earned through rural cooperatives. It is the intention of this article to bring to discussion the constraints of people participation towards rural cooperatives development. The agriculture and rural cooperatives in Iran in the recent years have diversified themselves into various areas of socio-economic activities. The failure of the government sector and various limitations of the private sector have compelled the policy-makers to pin their faiths on the cooperative system. In this article, author state role of agricultural cooperatives as fundamental keys for increasing productivity and creating job opportunities in rural regions of Iran (case study: South-Khorasan Province).

Investigating a power tiller vibration transmissibility using diesel-biodiesel fuel blends on stationary conditions

Author(s):Bahareh Heidary, Seyed Reza Hassan-beygi, Barat Ghobadian
Journal: Technical Journal of Engineering and Applied Sciences
Publisher:Science Explorer Publications
Abstract
| Pages: 877-884
The wide use of fossil fuel in internal combustion engine cause reduction in these fuel resources and also increase in greenhouse gasses and environmental pollution, for conquering these problems, so many researches have done for finding the renewable herbaceous fuel. Between these different kinds of fuel, biodiesel seems to be appropriate because of the nonexistence of air pollutions and the existence of similar trait with diesel fuel. In this research, vibration of 13hp power tiller in 5 levels of engine speed and 6 levels of consuming fuel blends for investigating the power tiller engine vibration behavior and the vibration transmissibility. Results showed that vibration transmissibility is decreased by increasing the engine speed. The maximum of the vibration transmissibility happened in B20 and B5 and minimum of it happened in B15 and D respectively. Also it is observed that the amount of vibration acceleration in longitudinal axis is much more than other two axes. The vibration acceleration value, in the frequency range of 8 to 100 Hz was higher than a dangerous frequency range of hand-arm vibration transmission and the total weighted acceleration has the maximum value at the frequency of 20, 31.5, 40 and 63 Hz with the vibration amplitude reach up to 20, 12.6, 18.6 and 40 m/s2 respectively. The best engine speed are 1400, 1600 and 2000 rpm, in this Engine speed using the B20 and B5 seems appropriate.

Cost/Benefit Assessment of Dstatcom Installation in Distribution System for Voltage Sag Mitigation

Author(s):Mohammad Mohammadi
Journal: Technical Journal of Engineering and Applied Sciences
Publisher:Science Explorer Publications
Abstract
| Pages: 885-890
Voltage sag which is generally caused by short circuits may cause sensitive equipment to malfunction and process interruption. Many papers have investigated the voltage sag compensation suing fact devises such as DSTATCOM. But in few papers the economical-technical aspect of this compensation has been discussed. The most paper have investigated the various methods for voltage sag compensation from point of view the designed control system for sag tracking, detection and mitigation and none of them has discussed the economic aspect of this procedure. This paper presents worth/cost assessment of the compensation of voltage sag using DSTATCOM in distribution system. Economical and technical aspects of this compensation have been considered and analyzed in this research. Installing of DSTATCOM needs to spent cost including capital cost and operation cost. Of course due to DSTATCOM installation, many benefits have been obtained. One of the main benefits is increasing reliability of system due to decreasing interruption of sensitive customers. In this paper a trading off among all of costs and benefits of installing DSTATCOM has been performed. The benefits of this installation has been analyzed based on receiving income due to increasing reliability level of system using reliability indices such as the average system interruption frequency index (ASIFI), the momentary average interruption frequency index (MAIFI) and energy not supplied (ENS).

Effect study of distance between planting rows and harvest time on Henna yield quantity

Author(s):Mohammad Asadi, Bahareh Damankeshan, Bahman Panahi
Journal: Technical Journal of Engineering and Applied Sciences
Publisher:Science Explorer Publications
Abstract
| Pages: 891-894
This experiment was conducted to determine the most suitable distance between planting rows and harvest time using time spilit plots RCBD with 4 replications. 3 rows spacing of (40, 60, 80 (cm)) were studied in main plots (A) and 3 harvest times (when b1:10-20, b2:40-60 and b3:80-100% of plants flowered) in sub plots (B). Wet and dry yield, and leaves yield were measured after plant establishment. At the end of each year the simple ANOVA and at the end of 3 years, the combined ANOVA was performed and means were compered by Duncan test. The highest leaves yield (3.240 (t/ha)) was achived from treatment A1B2 (40-centimeters planting rows harvested when 40-60% of plants flowered) by considering the table of ANOVA, significant effect of row spacing (A) and non significant effect of harvest times (B) and their interaction (A*B).
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