iosr-JMCE   Volume-19 ~ Issue-2 ~ Mar. – Apr. 2022

Abstract: Purpose: This paper is an empirical study of the assessment of library resources for meeting professional standards in secondary schools in South East Nigeria.
Methodology/Approach: The study adopted a descriptive survey design. The area of study was South East, Nigeria. The population was made up of 891 school librarians in all the public secondary schools in South-East, Nigeria. The sampling approach was proportionate stratified random sampling. The data collected was analyzed using frequency counts, percentage, standard deviation and mean scores. The basis for decision was 2.50 for both the upper and lower scores.........

Keywords: School libraries, Library resources, Assessment, Professional Standards, National Minimum Standards for School Libraries

[1]. Adebamowo, L. F. (2009). The use of school library resources in Ogun State secondary schools: A study of selected secondary schools in Ijebu North Local Government Area, Nigeria. Journal of Research in Education and Society, 2 (1), 113-121.
[2]. Adebayo, A. B. (2017). Educational role of school library in curriculum implementation for secondary schools. Continental Journal Information Technology, 10 (1), 19 – 33.
[3]. Adediran, S. A. (2009). Oyo government library development policy in primary schools. H. Salam & D. Saseyi. (Eds.). Symphony of service: The Oyo SPEB years. Ibadan: Green Dome Nig. Ltd. pp.187-193.
[4]. Adeferati, E. O. (2004). Essentials of library in education: A handbook for students of library studies and the user of the library institutions of higher learning in Nigeria. Reading Research Quarterly, 42(1), 40.
[5]. Adeyemi, T.O. (2010). The school library and students' learning outcomes in secondary schools in Ekiti State, Nigeria. Asian Journal of Business Management, 2 (1), 1-8. http://maxwellsci.com/print/ajbm/v2-l-8.pdf.

Abstract: In conventional hydropower installations, a dam is placed across a river to create a reservoir. All (or almost all) of the water is impounded behind the dam and the flow downstream is channeled to drive the turbine which in turn rotates an Alternator or Dynamo to generate electricity. Wind and Water turbine alternators are made to generate electricity at low speeds as the natural forces would achieve. These alternators are constructed with Permanent Magnets (PM) and able to generate electricity at speeds as low as 50 Rpm. In large Hydropower systems, very huge PM alternators are specifically constructed at huge cost to harness the water energy into electricity.......

Keywords: Hydro, Power, Speed, Multiplier, Alternator, Electricity

[1]. Edeoja A., Ibrahim S., and Kucha E. (2015). Suitability of Pico-Hydropower Technology for Addressing The Nigerian Energy Crisis – A Review. International Journal of Engineering Inventions, Volume 4, Issue 9; p. 18-24.
[2]. Basar M. F. and Othman M. M. (2017). An Overview of the Key Components in the Pico Hydro Power Generation System. ISBN: 978-1-61804-175-3; p. 206.
[3]. Abaka J. U., Ibraheem T. B., Salmanu H. and Olokede O. (2017). Hydropower Potential of Nigeria. International Journal of Modern Engineering Research; ISSN: 2249–6645, p. 53.
[4]. Faulhaber F. (2012). A second look at Gearbox efficiencies. Published by Engineering MicroMo Clearwater, Fla.
[5]. Sarasúa J. I., Elías P., Martínez-Lucas G., Pérez-Díaz J. I., José Román Wilhelmi J. R. and Sánchez J. A.(2014). Stability Analysis of a Run-of-River Diversion Hydropower Plant with Surge Tank and Spillway in the Head Pond. Scientific World Journal Volume, Article ID 874060, pp. 1-2.

Abstract: is the largest single variable cost in a vertically integrated industrial animal factory. U.S. Department of Agriculture have estimated that feed costs account for 60-64 percent of the total cost of producing poultry and eggs, 47 percent for pork, and 17 percent for beef. Feed requirements (in dry weight) for each chicken is 3-5% of their body weight. In animal feed consumption is influenced by various factors, namely energy levels, amino acid balance, feed fineness, animal activity, body weight, growth speed and environmental temperature. The increasing price of animal feed in recent years has caused many farmers to mix their own feed to make animal feed. At present the process of mixing animal feed is still stirred by hand.......

Keywords: mixing machine, subjective complaints, workload and work productivity

[1]. Dennis Olson, R. 2006. IATP Trade and Global Governance Program This fact sheet draws heavily on the Global Development and Environment Institute's Working Paper 05-07, "Identifying the Real Winners from U.S. Agricultural Policies," by Timothy A. Wise, which was adapted for IATP by GDAE Research Assistant Elanor Starmer. The original paper is available at: http://www.ase.tufts.edu/gdae/policy_research/RealWinners.htm. [2]. Setiawan, Tony and Arsa Tanius. 2005. Raising Ettawa Cross-breed Dairy Goats. Publisher: Swadaya. Jakarta.
[3]. Parakkasi, A. 1998. Science of Nutrition and Forage of Ruminants. UI Press. Jakarta. (references). [4]. Manuaba, A, 2000. Stress and Strain. Ergonomics. Vol. II. Denpasar. Work Physiology Ergonomics Study Program. Udayana University. [5]. Kroemer and Grandjean, 2009. E. Fitting The Task To The Human. A Texbook Of Occupational Ergonomics 5th. Edition Philadelphie: Taylor and Francis. (references)

Abstract: In this research dynamic analysis of outrigger system was carried out for a 60-storey building having an overall height of 180 m. First of all, comparison of performance between single and multi-outrigger was drawn, then analysis was carried out on different outriggers such as X, V, Inverted V and shear wall. Outriggers were placed according to Taranto theory i.e. (1/n+1), (2/n+1), (3/n+1), (4/n+1) … (n/n+1) of height [30]. Frame with only shear wall core and other outrigger models were analysed in ETABS software and different parameters as Maximum Story Displacement, Maximum Story Drift and Story Shears was compared. By analysing all the models by dynamic analysis for Earthquake Load (Response Spectrum) and static analysis for Wind Load it was concluded that structure becomes more resistive to lateral load with increase in no. of outriggers. Between X, V and inverted V type steel outrigger, inverted V is most effective but when shear wall was used as an outrigger, it gave better results than steel outriggers. Also belt trusses or shear bands increases the effect of outriggers even more.

Keywords: Outrigger System, ETABS, Dynamic Analysis, Static Analysis, Lateral Load

[1]. Akbar, A., & Azeez, S. (2016). "EFFECT OF OUTRIGGER SYSTEM IN A MULTISTORIED IRREGULAR BUILDING," 197–203.
[2]. Bayati, Z., M. Mahdikhani, and A. Rahaei. "Optimized use of multi-outriggers system to stiffen tall buildings." The 14th World Conference on Earthquake Engineering, Beijing, China. 2008.
[3]. Chen, Yue, and Zhenya Zhang. "Analysis of outrigger numbers and locations in outrigger braced structures using a multi objective genetic algorithm." The Structural Design of Tall and Special Buildings 27.1 (2018).
[4]. Haghollahi, Abbas, Mohsen BesharatFerdous, and Mehdi Kasiri. "Optimization of outrigger locations in steel tall buildings subjected to earthquake loads." The 15th World Conference on Earthquake Engineering, LISBOA. 2012.
[5]. Hasan, R. A. A. J. Behavior Of beam and wall outrigger in high –rise building and their comparison.

Abstract: The incorporation of Nano-particles in concrete as partial replacements for cement is considered as one of the solutions to improve the mechanical properties of the structural elements under fire exposure. The current study aims to investigate the effect of incorporating Nano-silica (NS) and/or Nano-clay (NC) in concrete on the compressive strength of concrete at ambient temperatures and after fire exposure. The current study develops predictive models to estimate the compressive strength of concrete modified with NS and/or NC at ambient temperatures and after fire exposure. Data of 208 cubic specimens of 100 mm obtained from the literature were chosen as a database for the proposed models. The specimens are divided into three groups. The first group includes 52 specimens for modeling......

Keywords:Nano-silica; Nano-clay; Multivariate regression; Prediction; Compressive strength

[1]. ASTM E2456-06 (2012). Standard Terminology Relating to Nanotechnology. ASTM International, West Conshohocken, PA.
[2]. Shah, S. P., Hou, P., & Cheng, X. (2015). Durability of cement-based materials and nano-particles: A review. Springer International Publishing Switzerland. K. Sobolev, S.P. Shah (eds.). Nanotechnology in Construction.
[3]. Elsayd, A., Fathy, I. (2019). Experimental study of fire effects on compressive strength of normal-strength concrete supported with nanomaterials additives. OSR Journal of Mechanical and Civil Engineering (IOSR-JMCE), 16(1), 28-37.
[4]. Hosny, H., and Abo Elmagd, S. (1994). Fire of Reinforced Concrete Structures. Dar Elnasher for Egyptian University, 1994.
[5]. Sha, W., & Pereira, G. B. (2001). Differential scanning calorimetry study of ordinary portland cement paste containing metakaolin and theoretical approach of metakaolin activity. Cement & Concrete Composites, 23(6), 455-461.

Abstract: Defects in properties of most soil samples encountered in construction industry call for search and research on different treatments measures to treat the available soils so as to meet up with the required standards. Cow Dung Powder (CDP) was used interchangeably with lime at ratios 4:0, 3:1, 1:1, and 0:4 (Lime: CDP) using the optimum lime contents derived from the plasticity of disturbed soil samples (granular material and silt-clay material)collected from two different locations (A and B) within Ado Ekiti, Ekiti state. The soil samples were subjected to laboratory tests such as particle density, particle size distribution, atterberg limits, compaction, California bearing ratio and unconfined compressive strength in accordance with British Standards......

Keywords: Cow dung powder; Particle density; Lime; Biodegradable material; Tropical soil.

[1]. Ayeni, I.S., Adekanmi, J.S., Abodunrin, D.O. Performance of Cow dung powder on compressive strength of blended concrete. World Journal of Engineering Research and Technology (WJERT). 2018; 4(3), 24-30
[2]. American Association of State Highway and Transportation Officials (AASHTO), Standard Specification for Transportation Materials and Methods of Sampling and Testing (14th ed.), USA: Washington DC, AASHTO. 1986.
[3]. Brady, N.C. The Nature and Property of Soil (6th Edition), 1990. MacMillan Publishing Company New York.
[4]. British Standard Methods of Test for Soils for Civil Engineering Purposes(BS 1377), 1990. UK: London, British Standards Institution.
[5]. British Standard Methods of Test for Stabilized Soils (BS 1924), 1990. UK: London, British Standards Institution.

Abstract: The increase of world population has led to the expansion of construction industry and depletion of natural resources. Accordingly, the need for recycling the demolished waste and producing recycled concrete aggregate (RCA), so that it can be used to replace natural aggregate (NA), became one of effective solutions to attain sustainability. This study aims to investigate the compressive strength of concrete containing different ratios of recycled coarse aggregates. Five mixes with target compressive strength ranging from 20 to 30 MPa were cast with five replacement ratios (i.e., 0%,25%,50%,75% and 100%).......

Keywords: Recycled Concrete Aggregates, Recycled Aggregates, Compressive Strength, Mechanical properties.

[1]. Tabsh, S. W., & Abdelfatah, A. S. (2009). Influence of recycled concrete aggregates on strength properties of concrete. Construction and building materials, 23(2), 1163-1167.
[2]. Kou, S. C., & Poon, C. S. (2015). Effect of the quality of parent concrete on the properties of high performance recycled aggregate concrete. Construction and Building Materials, 77, 501-508.
[3]. López-Gayarre, F., Serna, P., Domingo-Cabo, A., Serrano-López, M. A., & López-Colina, C. (2009). Influence of recycled aggregate quality and proportioning criteria on recycled concrete properties. Waste management, 29(12), 3022-3028.
[4]. Kou, S. C., Poon, C. S., & Wan, H. W. (2012). Properties of concrete prepared with low-grade recycled aggregates. Construction and Building Materials, 36, 881-889.
[5]. Rahal, K. (2007). Mechanical properties of concrete with recycled coarse aggregate. Building and environment, 42(1), 407-415.