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This study investigated self-concept as a correlate of the academic performance of Secondary School Students in Mathematics in Edo North Senatorial districts of Edo State. The purpose of the study was to determine the extent that self-concept explained students’ academic performance in mathematics. The population consisted of 3,000 SS1 students of which the multi stage random sampling procedure was used to locate a sample size of 600 students. Data collected with the aid of a 20 item self-concept questionnaire (SCQ) was analysed using multiple Regression. The results show that self-concept had positive correlation with students’ academic performance in mathematics. Based on the findings some recommendations were made. Contribution/ Originality
Internet can provide service with speedy, timely and also convenient to customer and meet customer’s needs. In this research, we can provide more details on youth market’ needs and try to overcome it. When the internet banking service is rapidly develop in recent years, competitive among banks in providing internet banking service is keep increasing. Banks are trying hard to serve better service to gain advantages. Among all age of customers, youngster is the most potential customer for banks because they are potential customer in the future. Beside, their perceived internet banking service is faster compare to older generation. Contribution/ Originality
This study is one of the few studies which have been investigated and will give positive influence on young consumers’ intention to use Internet banking. Hence, bank practitioners should focus on increasing usefulness of Internet banking system and bankers could take into account the stimulation of youth market for internet banking service. Business & Management » International Journal of Management and Sustainability » Month: 08-2015 Issue: 8
Dynamic Analysis of Competitive Technology Innovation Diffusion Model
Technological innovation diffusion theory and models play an important position in the forecasting field. Many researchers use these models to predict in different areas. Although the basic Bass model easy to use, but there are many limitations, the effects of Bass diffusion model for innovation diffusion factors (such as price, advertising, income, and technology supply) cannot measure. In order to find the principles of the relationships between innovations and the importance of the affection on the active of an innovation, this paper reviews the application of innovation diffusion models in the field of demand forecasting, through summarizing and analyzing a variety of predication models. Competitive innovation diffusion model include of monopolistic competition in a technology diffusion models and the evolution of the coexistence of two technologies competing diffusion evolution model. Under the aim of this paper, it uses mathematical methods in-depth analysis of competition, technological innovation diffusion models. This mathematical method includes nonlinear equilibrium point, stability analysis. Through the asymmetric evolutionary stability analysis, the paper derived the long-term evolutionary stable equilibrium of the innovation. Finally, the paper gives some suggestions on how to strength the competitive technology innovation in diffusion model. Contribution/ Originality
The paper’s primary contribution is the establishment of a competitive technological innovation diffusion model base on Bass model. It has built monopoly competitive diffusion model, the coexistence of two technologies competing diffusion model and lemma and theorem to solve this nonlinear equilibrium point. Economics » Games Review » Month: 12-2015 Issue: 2
Bioaccumulation of Hydrocarbon, Heavy Metals and Minerals in Tympanotonus Fuscatus from Coastal Region of Bayelsa State, Nigeria
Research Article
Author(s):
Journal: International Journal of Hydrology Research
Tympanotonus fuscatus is found in mangrove swamps of the coastal region of the Niger Delta Nigeria. It’s a source of protein, hence is used in the preparation of delicacies. This study investigated the bioaccumulation of hydrocarbon and heavy metals and minerals in T. fuscatus var radula and T. fuscatus var fuscatus from the brackish coastal region of Bayelsa state, Nigeria. Standard analytical methods were employed. Results showed that the concentration of the metals and hydrocarbon were highest in the shell. The concentration of calcium, magnesium, nickel, cadmium, chromium, mercury and total hydrocarbon content ranged from 10.717-14.533 mg/kg, 6.447 - 8.800mg/kg, 0.048- 0.823mg/kg, 0.010 - 0.036 mg/kg, 0.020- 0.023 mg/kg, 0.001 - 0.002 mg/kg and 0.060 - 0.767 mg/kg respectively. There was a significant difference (P<0.05) in the concentration of metals and hydrocarbon between the two varieties. The concentration of cadmium and mercury were below the limit to cause diseases as reported by the World Health Organization. Similarly the concentrations of nickel, chromium and hydrocarbon in the tissue were also low. High concentration of magnesium and calcium indicated their potential for health benefits. Furthermore, the high concentration of heavy metals and hydrocarbon in the shell of both species also suggested their potentials for bioremediation for such toxicants in the aquatic ecosystem. Contribution/ Originality
This study documents bioaccumulation of heavy metals, minerals and hydrocarbon on the tissue and shell of two varieties of Tympanotonus fuscatus from brackish coastal region of Bayelsa state, Nigeria. Agricultural Sciences » International Journal of Hydrology Research » Month: 03-2016 Issue: 1
Pollution Free Chemical Reactions in a Fluidized Bed
Emission of Green House Gases (GHG) and other industrial pollutants like CO2, SO2 , NOx is one of the major issues in industrial sectors.This analysis report concludes that control of these gases is especially important using gasification technology to reduce both CO2 and non-CO2 greenhouse gases. Coal gasification found to have some environmental benefits relative to conventional mining including like reduced sulfur emissions, reduced discharge of ash, Hg and tar, and the additional benefit of carbon capture and sequestration. Gasification of carbonaceous industrial residues will contribute to both electricity and thermal applications in gas and oil industry. Fluidized bed gasification system facilitates Gas-solids reactions, catalytic and non-catalytic reactions, drying and in petroleum industries for hydrocarbon cracking and reforming. The objective of present work is to make a note on the critical importance of gasification techniques and gaseous product with controlled emission to safeguard the atmosphere. Contribution/ Originality
This study originates an environment-friendly and sustainable solution to power crisis. This paper contributes the analysis of reduction of atmospheric pollutants when gasifying fossil fuels rather than direct combustion. The Papers primary contribution focus to prevent the emission of GHG, other industrial pollutants like CO2, NOx into atmosphere. This study is one of very few studies which have investigated the gaseous emission using different fuels. Energy & Environmental Sciences » Journal of Atmosphere » Month: 12-2015 Issue: 2
The Importance of Clinical Genotype in Patients with Klinefelter Syndrome. A Genetic Disorder Asociated to Taurodontism
Taurodontism is a clinical condition found in the molar teeth of humans whereby the body of the tooth and pulp chamber is enlarged vertically at the expense of the roots. As a result, the floor of the pulp and the furcation of the tooth is moved apically down the root. It is due to the failure or late invagination of Hertwig’s epithelial root sheath, which is responsible for root formation and shaping causing an apical shift of the root furcation. The constriction at the amelocemental junction is abnormally formed. Taurodontism is most commonly found in permanent dentition although the term is traditionally applied to molar teeth. It has been reported that taurodontism follows an autosomal dominant type of inheritance. Meanwhile, Mutations or chromosome aberrations are considered alterations in the chromosome number or structure. They are mainly considered due to gametogenesis inborn error at meiosis, where DNA loses are seen due to DNA repair processes deficiency. Some chromosome studies were performed were 34.6% (1596 patients) showed different chromosome alterations. Among the studies population, male and female pediatric patients with sexual genetic diseases were chosen. These chromosome changes are classified as numeric or structural alterations, respectively. A wide variety of pediatric patients with genetic diseases chromosome alterations are described in this study analyzing their clinical characteristics, medical, surgical treatments and their clinical evolution according to the genetic disease. Contribution/ Originality
This study contributes in the existing literature the relation of a well known genetic syndrome as klinefelter, a sexual chromosome alteration (47, XXY) and pediatric patients with taurodontism, an oral situation with teeth roots that grow crookedly with very huge teeth, likened to a bull. Medical Sciences » Journal of Diseases » Month: 06-2015 Issue: 2
Contactless bank cards have been issued steadily to banking customers over the past four years and this trend has continued to grow rapidly more recently. We want to highlight a list of security issues as well as privacy threats to be concerned with when using such contactless bank cards. Further advances in smartphone technology applications can lead to new threats in relation to contactless bank cards. This study contributes to the literature as it highlights data protection issues in Ireland and also highlights the major push by authorities to adopt a cashless banking society which could potentially lead to further data protection problems in Ireland. Contribution/ Originality
This study is one of very few studies which have investigated the potential security issues facing customers in Ireland who use contactless bank cards. The study documents many security concerns and offers definitions and examples of relatively new terms. Computer Sciences » Journal of Information » Month: 12-2015 Issue: 2
A Review on the Use of Moxifloxacin in Multidrug Resistant Tuberculosis
The first line anti-tuberculosis drugs have shown an increasing prevalence of resistance. The higher incidence of TB has led to stronger requirements of other therapies apart from the World Health Organisation recommended Directly Observed Therapy in Short course (DOTS). New drugs highly effective against Mycobacterium tuberculosis (MTB) could enhance the treatment of cases with resistance to first line drugs (isoniazid and rifampicin) and may curtail the extent of present regular regimes. Fluoroquinolones are reasonably effective against Mycobacterium tuberculosis (MTB). They have been used as alternative for some present first-line drugs such as Isoniazid, and have been efficient even in Multi Drug Resistant Tuberculosis. These efforts must be further enhanced to ensure ultimate success in discovering, developing, and delivering drastically improved therapies for tuberculosis patients. Contribution/ Originality
The paper’s primary contribution is finding that Moxifloxacin may curtail the time duration and adverse events in the case of multi drug resistant tuberculosis. Medical Sciences » Genes Review » Month: 12-2015 Issue: 2
Anti-Proliferative Effect of Asiatic Acid on Hep-G2 Cell Line
Asiatic acid (AA) is a pentacyclic triterpene in the leaf of the plant Centella asiatica (CA) is known to inhibit proliferation and induce apoptosis in several tumor cell lines. Plants are playing a significant role in human life as food, shelter and stability of the ecosystem. Most importantly to humans, it is currently estimated that 50% of all drugs in clinical use has been derived from natural products and at least 25% of all prescription drugs contain ingredients extracted from plants. In the present study, the antiproliferative activity of various concentrations (10, 20, 30, 40, 50, 60 µg/ml) of AA, a active principle of CA, on human Hep G2 liver cell lines (untreated and treated) was determined by the MTT assay based on the detection of mitochondrial dehydrogenase activity in living cells. The study reveals that the AA effectively inhibits the growth of cancer cells in concentration dependent manner and at a high of 85 % at the concentration of 50µg/ml. Contribution/ Originality
Big Data predicts outcomes and has great impacts on knowledge discovery and value creation. It can be used to fight against terrorism and enhance Homeland Security by providing accurate predictions and patterns of terrorist activities. This paper introduces some methods and technologies used in Homeland Security. They are: biometrics, radio frequency identification (RFID), data mining, cloud computing, and Big Data. Big Data applications in Homeland Security are presented. These applications include Big Data in general security and public safety, crime prediction and aviation security, disasters, and cybersecurity and cyber defense. Big Data challenges in security are also discussed. Contribution/ Originality
This study contributes in the existing literature and presents technology progress and applications of Big Data in Homeland Security, especially in cybersecurity and cyber defense. Computer Sciences » Journal of Information » Month: 12-2015 Issue: 2
E-Marketing and Survival of Micro, Small and Medium Enterprises (MSMEs) in Uganda, A Study of Northern Uganda
Research Article
Author(s):
Journal: International Journal of Management and Sustainability
This study examined the relationship between e-marketing and Survival of Micro Small and Medium Enterprises (MSMEs) in Uganda, with particular emphasis to Northern Uganda. The study objectives were; to examine the relationship between e-marketing and MSMEs survival, to analyze the effect of different e-marketing services on MSMEs survival, investigate the effect of e-marketing performance on MSMEs survival and to determine the moderating effect of marketing innovations on the relationship between e-marketing and MSMEs survival. The study was based on the frequent media reports and the researcher’s experience over low survival rate of MSMEs. Several reports indicated that MSMEs in Northern Uganda do not live to see their first birthday and for almost every 35% of the MSMEs that close, about 37% start new businesses again. The study used a cross sectional descriptive design where both qualitative and quantitative methods were employed. A total of 175 respondents were sampled from a population of 322 including Micro, small and Medium Enterprises owners, Managers and District officials. Using a combination of self-administered questionnaires and interview guides for District officials, results shows that there is perfect relationship between e-marketing and MSMEs survival. The findings also indicate that different e-marketing services affect MSMEs survival significantly. Further, the study indicated that e-marketing performance affects MSMEs survival greatly. The study concludes that marketing innovations acts as an important moderator in the relationship between e-marketing and MSMEs survival. The study recommended that MSMEs owners and Managers should increase the use of e-marketing services in their enterprises to enable them survive and be competitive. This can be done through business website development, frequent internet use, social network, computer use, and Search engine optimization. The researcher also recommended that MSMEs owners / Managers should not overuse word of mouth in their businesses as it does not promote business survival. Word of mouth should only be used in few situations, when it is absolutely imperative, such situations can be where customers are illiterate of e-marketing services. MSMEs owners and Managers were also advised to properly train in e-marketing services and be committed in using what they have learnt so as to encourage their customers in using e-marketing. Contribution/ Originality
This study is one of the very few studies which have investigated e-marketing and MSMEs survival in Uganda. The paper contributes the first logical analysis for empirical findings, thus leading to MSMEs specific policy implications rather than the general policy recommendations found in the existing literature for MSMEs survival. Business & Management » International Journal of Management and Sustainability » Month: 09-2015 Issue: 9
Prevalence and Management of Some Surgical Affection in Cattle and Buffaloes at Qena Governorate in Field Situation
Research Article
Author(s):
Journal: International Journal of Veterinary Sciences Research
Surgical affections in cattle and buffaloes are commonly encountered in different areas all over the world. The aim of the present study was to state the prevalence and different management of some surgical affections in cattle and buffaloes. The study was carried out on 406 animals suffering from different surgical affection recorded at different locations at Qena governorate. All cases were subjected to full study including case history and clinical examination. In addition, medical and/or surgical treatment was applied according to the routine manoeuvres in the available literatures. Results revealed that 11 groups of surgical affections were recorded. 72.66% of cases can be medically and/or surgically corrected. 7.88% of cases were referred to specialized veterinary hospital and 16.5% were left without treatment. A small number of cases (2.96%) were culled and directed to the slaughter house. Contribution/ Originality
This study contributes by way of investigation of the prevalence and different management of some surgical affections in cattle and buffaloes. This study documents that there are 11 groups of surgical affections in cattle and buffaloes and most of these affections (72.66%) can be medically and/or surgically corrected. Agricultural Sciences » International Journal of Veterinary Sciences Research » Month: 12-2015 Issue: 4
The Effect of Outsourcing on Anglogold Ashanti Obuasi Mines Performance
Research Article
Author(s):
Journal: International Journal of Business, Economics and Management
Competition in the modern world has forced organisations to adopt innovative ways to create value. The world has embraced the phenomenon of outsourcing and companies have adopted this principle to help them expand into other markets. Tactical management of subcontracting is perhaps the best instrument in management, and subcontracting of innovation is its frontline. The purpose of this study can be summed up as assessing outsourcing in Anglogold Ashanti Obuasi mines. This study adopted the descriptive research approach. Questionnaire was administered to staff of outsourcing department. One hundred (100) employees of AngloGold Ashanti Obuasi Mines were sampled. Quantitative data analysis technique (such as Mean, Standard deviation, confidence level, frequency, and simple percentages) and qualitative data analysis technique such as content analysis will be used to analyse collected data. Some of the activities that are outsourced are; transportation of employees to and from work, haulage of mine ore, residence maintenance, and purchase and contract unit are outsourced. In addition information technology, human resource, and management services are not outsource. It was also found out that outsourcing helps to: cut down cost; focus on core activities; generate competitive advantage; transfer operational risk; achieve efficiency and economies of scale; access expertise that is lacking in-house; and save valuable time. However outsourcing does not help AngloGold to expand and that the major reason for outsourcing at AngloGold is to help the company to focus on core activities. It was discovered that outsourcing of activities at AngloGold Ashanti Obuasi mines has not always achieved the stated objectives. Contribution/ Originality
This study contributes to the existing literature by evaluating the effect that outsourcing has had on the financial and non-financial operations of gold mining companies in West Africa region from the perspective of one of the largest gold producers in the world, Anglogold Ashanti Obuasi mines. Economics » International Journal of Business, Economics and Management » Month: 08-2015 Issue: 8
A Review upon the Changes Which Come With the Model upon Turkish Metropolitan Municipality within the Provincial Administrative Boundaries
Research Article
Author(s):
Journal: International Journal of Public Policy and Administration Research
The growing cities in Turkey by the population and spatial terms and the increase of societies’ own expectation about services have revealed the basic needs on upcoming amendments for available municipality laws. The constitution act in 1982 brought new and specific management forms for big settlements in Turkey, then the metropolitan municipalities were firstly founded in 1984. Consequently, the metropolitan municipality law 6360 has been finally accepted in 2012. Besides, the area management principle was also accepted for metropolitan municipalities which gave services for rural areas as well as the urban ones. Equaling the service area of metropolitan municipalities to the provincial administrative boundaries resulted in the debates on some important changes upon duties, responsibility issue, and representation and participation concepts. In this study the case of metropolitan municipalities’ own available system which has an important place in local governance will be analyzed. Contribution/ Originality
This study contributes in the existing literature of public administration and local governments. Indeed, this study uses new estimation methodology for the sphere of existing administrative nature in decentralized bodies of Turkey. This study documents the new profile of metropolitan municipality model’s characteristics. Economics » International Journal of Public Policy and Administration Research » Month: 09-2015 Issue: 3
Gender Issues of Labour Participation in Vegetable Production in Ikorodu Local Government Area of Lagos State
Research Article
Author(s):
Journal: Current Research in Agricultural Sciences
The study was conducted to identify and specify gender tasks and roles in vegetable production with ultimate goal of better targeting the resources in agricultural sector. One hundred and twenty vegetable farmers were surveyed in Ikorodu local government area of Lagos State. Multistage stage sampling technique was used to select one hundred and twenty (120) vegetable farmers as the sample for the study. Data was collected by means of structured questionnaire. Percentages, Means and Frequencies were the main descriptive statistical tools utilized while Pearsons’ correlation coefficients were estimated to ascertain the association between women participation and selected socioeconomic variables. The findings revealed that 87.50% of females and 91.07% male vegetable farmers fall between the ages of 20-50 years with a mean age of 50.85 years. 65.61% of females and 30.36% of males’ vegetable farmers had formal education while none of the vegetable farmers receive post-secondary education. The role of women in majority of the cases was supportive in nature while the dominative role in most of the cases was performed by men. Correlation analysis revealed that Age, marital status, farming experience and Farm size were positively related with women participation in vegetable production. Education had no relationship with women participation in vegetable production. It was suggested that projects and programmes that aim to increase vegetable production should be designed to address the complementary roles that men and women farmers play. Contribution/ Originality
This study documents that although women dominated in some operations of vegetable cultivation but in totality male participation was more prominent. The roles of women in majority of the cases were supportive in nature while the dominative roles in most of the cases were performed by men. The study further revealed that age, marital status, farm experience and farm size were positively related to women participation in vegetable production in the study area while education was negatively related to women participation in vegetable production. Agricultural Sciences » Current Research in Agricultural Sciences » Month: 12-2015 Issue: 4
Genetic Divergence and Character Association of Kabuli-Type Chickpea (Cicer Arietium) Genotype under Rainfed Conditions in Ethiopia
Research Article
Author(s):
Journal: Current Research in Agricultural Sciences
Chickpea is the major pulses grown in Ethiopia, mainly by subsistence farmers usually under rain-fed conditions Variability, heritability and correlation are the backbone of every selection method. The objective of the present study was to assess genotypic variability, heritability and correlation of 17kabuli-type genotypes for yield and yield related traits under rainfed condition. The experiments were conducted at the field area of Akaki, Chefe donssa, Deber zeit, Dembia and Haramay under RCB Design with four replication including 17 diverse genotypes of chickpea. There were significant genetic differences between genotypes for all the characters studied which suggested enormous scope of genotypes selection with desirable characters. High heritability for seed per pod, 100 seed weight and pod per plant high genetic advance revealed that additive gene effects were important in determining these traits. High heritability with low genetic advance for days to flowering and seed per pod indicated influence of dominant and epistatic genes. Estimation of correlation coefficients showed that pods per plant, plant biomass, plant height, and harvest index and 100-grain weight were positively correlated with grain yield. The traits, which revealed high amount of heritability and genetic advance, were controlled by additive genes, which advocated the chances of their improvement through selection. In the present investigation high to low heritability with moderate estimates of genetic advance recorded for pod per plant, seed per pod, plant height days to flowering, days to maturity,100 seed weight and grain yield where careful selection may lead towards improvement for these traits. Hence, provides better opportunities for selecting plant material for these traits in chickpea. Contribution/ Originality
Export demand estimates are important for meaningful export forecasts, planning, and policy formulation that can help improve the performance of the sugar subsector in Swaziland. This study estimated the determinants of export demand for Swazi sugar and measured the impact of the EU reform on Swazi sugar export demand. The study used panel data approach by using annual time series data between the periods 1997 and 2012. An LSDV fixed effects model was employed. Export price, Importer GDP and the EU reform were found to be significant in explaining export demand for Swazi sugar. These variables had coefficients -121.069, and -2.682, respectively, whose signs were against the priori expectation except for export price. The EU reform was found to have an overall positive impact to Swazi sugar export demand with coefficient of 120 816. The study also measured elasticities of the explanatory variables to the export demand of Swazi sugar. Export price, foreign income, producer prices and real exchange rate were found to be inelastic with elasticities of 0.35289, 0.00168, 0.04256 and 0.28572, respectively, for all the markets (SACU, EU, USA and COMESA) pooled together. Explanatory variables in the individual markets were found to be highly elastic. The study, therefore, recommended that Swaziland needs to take advantage of the EU reform and invest more on sugar production as it was not negatively affected. Swaziland also needs to negotiate for the quotas abandoned by those countries heavily affected by the EU reform. Contribution/ Originality
This study contributes in the existing literature by using demand function on the Swaziland Sugar Industry. This is the only study to be undertaken in Swaziland in relation to the Sugar Industry. Hence the study is original. Agricultural Sciences » International Journal of Sustainable Agricultural Research » Month: 03-2016 Issue: 1
Analyzing the Determinants of Achievements of Beneficiaries of Literacy Programs in Morocco: A Multilevel Analysis
This paper aims to assess the determinants of success of literacy programs in Morocco. This work uses hierarchical models. This specification provides opportunities to simultaneously analyze the impact of individual variables and taking into account the socio-spatial variations. The results show that the quality of literacy services, as measured by the total score, the level of information about the level of knowledge, is subject to variability. The analysis highlighted the diversity of factors that may be responsible for this variability. Some of these variables are related to the characteristics of the beneficiaries, other characteristics of trainers and logistical conditions in which the literacy process unfolds. Contribution/ Originality
Aims to assess the determinants of learning achievements of the beneficiaries of illiteracy programs. Some of these are related to the recipients’ characteristics, others to the trainers’ characteristics and logistical conditions in which the literacy process unfolds using hierarchical models. Social Sciences » Humanities and Social Sciences Letters » Month: 09-2015 Issue: 3
Principals’ School Plant Management and Academic Performance of Biology Students in Public Secondary Schools in Uyo Senatorial District, Akwa Ibom State
Research Article
Author(s):
Journal: International Journal of Education and Practice
This study investigated the relationship between Principals’ School Plant Management and Academic Performance of Biology students’ in Public Secondary Schools in Uyo Senatorial District of Akwa Ibom State. The population of the study comprised all principals, and 18,573 SS2 students. However, teachers in the study area were involved in the study as they were used to rate principals ability to manage school plant. Correlational design was adopted. To guide the study, three research questions and three null hypotheses were formulated. Stratified random sampl-ing technique was used to select 281 teachers and 371 SS2 Biology students as respondents for the study. Two-researchers-developed-instruments tagged School Plant Management Questionnaire (SPMQ) and Students’ Achievement Test in Biology (SATB) were used to collect data needed for the study. The instruments were validated by experts in measurement and evaluation .The reliability of the two instruments was established using randomly selected members of the population who did not take part in the study. The data obtained was analyzed using Cronbach alpha technique and a reliability co-efficient of .801 and .803 was obtained; The data were analyzed using Simple and Multiple Regression Analysis. The formulated hypotheses were tested at .05 level of significance. Findings revealed that: There is significant relationship between management of instructional facilities, circulation space, and academic performance of Biology students. The result also shows that there is no significant relationship between management of recreational facilities and academic performance of Biology students.. This study therefore concludes that systems approach should be instituted by principals in the management of school plant components under review to improve on academic performance of students. It is recommended among others that, Education Board, Ministry of Education, Institutional planners, and all stakeholders in secondary education should adopt effective and sustainable strategies to ensure adequate provision, utilization, maintenance and management of school plant in the secondary system. Contribution/ Originality
This study uses contributes in the existing literature on the theoretical concept of school plant management. Arts and Education » International Journal of Education and Practice » Month: 08-2015 Issue: 8
Characterization of Sedimentary Anzali Sand for Static and Seismic Studies Purposes
Research Article
Author(s):
Journal: International Journal of Geography and Geology
Anzali as one of the populated coastal cities in the Northern Iran, contains a particular type of marine sand which is worth to be investigated for many engineering practices. This particular sand is mainly composed of saturated fine grains and is highly prone to liquefaction phenomenon during seismic events. Geotechnical zonation of the subterraneous layers show that most of sandy sedimentary soils found below the surface in this area is formed by relatively clean and fine sand. In this research, the geotechnical characteristics of Anzali sand have been studied. It is done based on three sources of information, i.e. field studies, static tests and physical modeling by dynamic tests. In this regard, the overall zonation of this area has been carried out and the extent of the sandy area has been investigated. Anzali sand has been characterized by making use of a number of soil samples obtained from various parts on which, index tests have been carried out. Furthermore, based on laboratory shear tests and information gathered from in situ tests, the shear strength parameters and the critical limits for Anzali sand have been classified. Finally, large scale physical model tests were conducted to show the dynamic behavior of the sand under cyclic and dynamic loads and also the development of the excess pore water pressure during dynamic loading that could cause the liquefaction initiation. Contribution/ Originality
In essence, the paper’s primary contribution is to find or estimate Anzali Sand parameters which are required for prediction or analysis of liquefaction potential during seismic effects. This is done by a number of tests on samples extracted from locations in this area. Energy & Environmental Sciences » International Journal of Geography and Geology » Month: 10-2015 Issue: 10
Abstract