Developing shellfish industry in Nigeria: technology and economics

The paper asserted that shellfish resources are poorly developed and utilized in West Africa. This was proved by the fact that in 2008 total marine shellfish capture production in West Africa was only 29,815 tonnes. The advantages of Nigeria in beefing up its production are highlighted. Some of these advantages are on extensive coast line which has not been affected by industrial pollution. The tropical climate is also an advantage for growing of cultured shellfish. The paper highlighted that to maximize the potential of shellfish Mari-culture development requires education, training, seed production technology, grow-out technology, processing and marketing. These requirements are discussed in details in the paper

A Sociolinguistic Approach to Security Challenges and Sustainable National Development in Nigeria

The study is a sociolinguistic approach to solving security challenges and enhancing sustainable national development in Nigeria. It argues that language and society influences each other and as such language could be used to solve societal problems. In doing so, the paper x-rays the functions of language in human society as propounded by Halliday and Stubbs. It discusses the multilingual nature of Nigeria, the concept of national development as well as security challenges facing the country. The paper notes that the dominant use English language against the indigenous languages in nearly all communicative domains in Nigeria has failed the nation in its bid to overcome numerous security threats. This may not be unconnected with the low literacy level in the country. As a result, the paper recommends a tripartite language policy vis-à-vis the use of English language, the indigenous languages as well as the Nigerian Pidgin depending on the contextual demand. The paper also advocates the adoption of more indigenous languages, apart from the three major ones- Hausa, Igbo and Yoruba, for use. This will imply a revision of Nigeria's language policy and the constitutional provisions on language

Impact of Contractors’ Prequalification Criteria on Civil Engineering Project Quality Performance

Considering the high premium placed on quality by clients, this study was set to reveal the importance as well as the impact of contractors\u27 prequalification criteria on quality performance of civil engineering project. Its purpose was to proffer solution to the quality problem associated with civil engineering project of the construction industry by enabling the client and consultants saddled with the responsibility of selecting contractors to identify the set of criteria that can produce project of expected quality standard. The data used was solicited from Quantity Surveyors and Civil/Structural Engineers expressing client\u27s opinion. The data were analysed by employing regression method. Results showed that contractors\u27 prequalification criteria reflect two different forms of relationship with quality performance of civil engineering project. Hence, contractor\u27s prequalification criteria affect quality performance of civil engineering project in different ways. Ability of contractors\u27 prequalification criteria to predict the quality performance of civil engineering project differs from one and another. Some of the contractors\u27 prequalification criteria emerged as weak predictors while some proved to be strong predictors of quality performance of civil engineering project. Consequently, it recommended that less attention be accorded the weak predictors as a result of having insignificant impact on quality performance of civil engineering project. Emphasis should be on the strong predictors of quality performance because they have significant impact on quality performance of civil engineering project

Insights into the Nature of Synergistic Effects in Proton-Conducting 4,4−1H,1H-Bitriazole-Poly(ethylene oxide) Composites

A nitrogen-containing heterocycle (NCH), 4,4-1H-1H-bi-1,2,3-triazole (bitriazole), capable of mimicking the hydrogen bonding of water in the solid state is synthesized and its ability to conduct protons in the presence of poly(ethylene oxides) under anhydrous conditions is investigated. Bitriazole is shown to have sufficient thermal and electrochemical stability for fuel cell applications. The composites formed between bitriazole and poly(ethylene oxides) give proton conductivities that can be described by the Vogel−Tamman−Fulcher (VTF) equation. These characteristics suggest coupling between polymer segmental motion and ion transport. The bitriazole N-H proton is shown to be the source of conductivity, and bitriazole and poly(ethylene oxides) function synergistically through specific intermolecular interactions and polymer-induced segmental motion to create a pathway for proton transport via structural diffusion

Development and Validation of Web-based Courseware for Junior Secondary School Basic Technology Students in Nigeria

This research aimed to develop and validate a web-based courseware for junior secondary school basic technology students in Nigeria. In this study, a mixed method quantitative pilot study design with qualitative components was used to test and ascertain the ease of development and validation of the web-based courseware. Dick and Carey instructional system design model was adopted for developing the courseware. Convenience sampling technique was used in selecting the three content, computer and educational technology experts to validate the web-based courseware. Non-randomized and non-equivalent Junior secondary school students from two schools were used for field trial validation. Four validating instruments were employed in conducting this study: (i) Content Validation Assessment Report (CVAR); (ii) Computer Expert Validation Assessment Report (CEAR); (iii) Educational Technology Experts Validation Assessment Report (ETEVAR); and (iv) Students Validation Questionnaire (SVQ). All the instruments were face and content validated. SVQ was pilot tested and reliability coefficient of 0.85 was obtained using Cronbach Alpha. CVAR, CEAR, ETEVAR were administered on content specialists, computer experts, and educational technology experts, while SVQ was administered on 83 JSS students from two selected secondary schools in Minna. The findings revealed that the process of developing web-based courseware using Dick and Carey Instructional System Design was successful. In addition, the report from the validating team revealed that the web-based courseware is valuable for learning basic technology. It is therefore recommended that web-based courseware should be produced to teach basic technology concepts on large scale

Proton-Conducting Solid Electrolyte via Ozonolysis of Cationic Ammonium Organoalkoxysilane Surfactant-Templated MCM-41

A functional polymerizable surfactant has been synthesized and used as a template to prepare MCM-41. Ozonolysis of the olefin functional group in the composite material generates a nonporous proton-conducting solid acid that has a conductivity of ca. 6 mS cm^(-1) at 95 °C and an activation energy of 14.2 kJ/mol

Effects of Computer Assisted Instruction on Secondary School Mathematics Students\u27 Spatial Ability, Achievement and Attitude in Niger State, Nigeria

This study investigated the effect of computer assisted instruction on secondary school mathematics students\u27 spatial visualization ability, achievement and attitude in Niger State. Three (3) research questions and their corresponding hypotheses guide the study. The study adopted a quasi-experimental design using pretest posttest non-equivalent, non randomized control group. The instruments for data collection were Geometry Achievement Test (GAT), Spatial Ability Test (SAT), and Mathematics and Technology Attitude Scale (MTAS) validated by six senior lecturers. The target population were all SS II mathematics students in the 150 senior Secondary Schools in three educational zones of Niger State. The sample consisted of 330 SS II (178 males and 152 females) from nine secondary schools. In each school, a stream (arm) of SS II class was randomly selected and used for the study. The three groups were pretested using GAT and SAT to determine their entry-level equivalence, while the post-test instruments are SAT and MTAS administered after six (6) weeks of instruction. The finding of the study revealed that the males outperform than females in spatial ability tasks and had higher positive attitude towards learning mathematics with technology. The study recommend mathematics teachers and instructors should adopt modern teaching pedagogies that are learner-centred and provides platform the development of spatial skills in children and adult a likes

Assessment of Factors Responsible for the Choice of Contractors’ Prequalification Criteria for Civil Engineering Project: Consultants’ Perspective

It is not uncommon, during contractor selection process, for prequalifier's decisions to be informed by certain parameters. In the light of this, the choice of the criteria to be eventually adopted depends on factors that play complimentary role when the contractor is to be selected. Therefore, this study assesses the factors that determine the choice of contractors' prequalification criteria for civil engineering project. The purpose is to bring the unrecognised factors into limelight by establishing the degree of their relevance on the choice of contractor's prequalification criteria as well as ascertaining their importance to meeting stakeholder's objectives. The objectives include identifying the factors which determine the choice of contractors' prequalification criteria for civil engineering project and assess the importance of the factors to meeting stakeholders' expectation. The study employ well-structured questionnaire distributed to various category of respondents comprising Civil/Structural Engineers, Quantity Surveyors and Architects engaging in civil engineering project. It adopts percentile, mean item score (MIS) and relative importance index (RII) in the analysis of the data derived from the retrieved questionnaire. Result indicates that, apart from Civil/Structural Engineers, employment into civil engineering organizations favours Quantity Surveyors than Architects. Construction of building is paramount among civil engineering organizations with little involvement in railway project. The choice of contractors' prequalification criteria for civil engineering project is dictated by a number of factors with project type emerging the most influential. Importance of the factors touches the client, consultants and contractor. It recommends that Quantity Surveyors should embrace continuous professional development. Factors influencing the choice of contractors' prequalification criteria must be duly considered before taking final decision on the criterion/criteria to adopt in choosing the contractor for civil engineering project prioritizing project type