Construction of steel shed: a case study of automobile service center, bells university of technology, Sango-Ota, Ogun state, Nigeria

The construction of steel shed for Automobile Service Centre at the Bells University, Sango-Ota, Ogun State, Southwestern Nigeria was deemed necessary in order to expand the existing structure, ensure safety and bring economic gains to the Institution. This paper therefore presents a report of the construction of steel shed at the Automobile Service Centre where activities such as automobile checks, repairs and so on are been carried out. In carrying out the project, the following methods were adopted: evaluation of design/working drawings, selection and fabrication of structural members, construction work and finishing. All methods follow standard procedures as specified in relevant British standards. The assemblage and completed work were the results of the methods mentioned above and it was confirmed that the members were adequate to carry the live and dead loads that they may be subjected to. The aim of the project was achieved.

New closed-form soliton solutions for the tzitzeica dodd bullough equation arising nonlinear optics via three distinct re-liable approaches

Tzitzeica Dodd Bullough (TDB) equation appears in the field of quantum field theory and nonlinear optics. In this article, we extracted abundant new soliton solutions with free choice of arbitrary parameters to the Tzitzeica-Dodd-Bullough (TDB) equation through the three separate methods such as the enhanced -expansion method, the improved -expansion method and the -expansion method by means of the wave transformation and the Painleve property. In these schemes, we formally derived some new closed form soliton solutions of the TDB equation through with symbolic computation package Maple. Soliton solutions are expressed by hyperbolic function, trigonometric function and rational function. The attained solutions are verified by symbolic computation software Maple 17. The attained solutions can be demonstrated by two-dimensional (2D) and three-dimensional (3D) graphs. Finally, it can be concluded that the adopted methods are very effective and well-suited to find new closed-form soliton solutions to the other nonlinear evaluation equations (NLEEs) with integer or fractional order.

Quantum non-demolition measurement in the interferometer

The schemes of the arrangements based on the Mach-Zehnder interferometer and the interferometer with two polarizing beam splitters are considered. The interferometers in both the schemes are equipped with some devices, creating a Kerr medium, to perform the quantum non-demolition measurement of a single photon. Such a device gives which way information of the photon while preserving the work of the interferometer.

The thermodynamic principles as the theoretical basis of fair remuneration

Thermodynamics is the key to solving many economic problems. Since the human body is driven by heat engines, there is a loss of energy source. Measuring this loss means it is possible to indicate the size of a fair wage. Another version of the second principle justifies the amount of depreciation of real assets, such as machinery and equipment. A significant purpose of the article is to indicate that the category of capital cannot be understood without knowing the first and second principle of thermodynamics. The main aim is to present the theory of equitable remuneration developed using the second principle of thermodynamics and the discovered economic constant. Theoretical research leads to the creation of a model of capital and a model of fair pay with the understanding of the existence of an economic constant quantifying the action of natural forces on capital growth. Empirical research estimates the size of the constant and verifies the fairness of remuneration. The research reveals the existence of an economic constant necessary in capital theory, especially in the field of remuneration for work. Models for measuring human capital of employees and formulas enabling calculation of fair remuneration and its updating are presented. Additionally, using the entropic version of the second principle, the depreciation amounts of fixed assets are determined. The main conclusion of the presented research and the formulated theory is that thermodynamics is essential for the correct understanding of the category of capital defining as the abstract ability to perform work.

Radiological risk assessment of some consumed cigarettes and hookah in Iraq

The main purposes of the research are to assess the radiological risk due to smoking cigarettes and hookah and their impacts on the people health. Radon levels were measured in 28 consumed brands of cigarettes and 10 brands of hookah consumed Iraq using CR-39 solid state nuclear track detectors (SSNTDs). The results showed that the 222Rn concentration in cigarette tobacco samples ranged from 138.9 to 781.2 Bqm-3 with average value of 318.0 Bqm-3. The radon concentrations emerged from 11brands of the investigated samples was significantly higher than the recommended value. While, its concentration in hookah ranged from 633.6 Bqm-3 to 416.6 Bqm-3 with average value of 509.5 Bqm-3. The Potential Alpha Energy Concentration (PAEC) in terms of (WL) units, Exposure to radon progeny (EP), and the annual effective dose (AED) in terms of (mSv/y) units were also obtained. Lung cancer cases per year per million people (CPPP) are also evaluated with an average value of 144.4 per million people. The result indicates that the average values of PAEC, EP and AED were within the recommended range values given by UNSCEAR, NCRP and ICRP respectively. The radioactive impact of smoking is considered as a risk factor for lung cancer.

Assessment of heavy metals and radioactivity concentrations in Iraqi truffles

Concentrations of heavy metals in several species of desert truffles, collected from different Iraqi provinces, were determined. Samples were collected from Al-Anbar Salah ad-Den and AlMuthana provinces. The levels of Cd, Cr, Pb, Mn, Ni, and Zn were analyzed. As well as the level of radon in the truffle samples were also measured using the solid-state nuclear track detector (CR-39). The results reveal that the concentrations of the investigated elements in the Iraqi truffles were below the recommended levels and the ascending order of the measured toxic elements was Ni˂Mn˂Zn. The concentrations of the other elements (Cd, Cr and Pb) were below the detection limit of the measuring method. Radon activity levels in the study truffle samples were between (156.23 to 513.83) Bq.m-3 with mean value of (323.23) Bq.m-3. the results reveal that most measured radon activity were below the world recommended value given by ICRP except Ramadi sample. All the computed values of health risk index (HR) of all elements were within safe limits (HR<1), therefore, the consumption of the investigated truffles does not pose any health risks from the investigated heavy elements and from radiological point of view.

Elastic constants and optical phonon frequencies of BX (X= P, As, and Sb) semiconductors: Semi-empirical prediction

Based on some simple empirical formulas established by Adachi in, Properties of group-IV, III-V and II-VI semiconductors, John Wiley & Sons, Chichester (2005), and the experimental lattice constants reported in the literature; the present work aims to predict the elastic constants and some other significant properties of cubic zinc-blende boron compounds (BP, BAs and BSb). The obtained values of C12and C44 are in general good agreement with other data of the literature, while C11 and B are slightly lower. The zone-center longitudinal optical (LO) and transverse optical (TO) phonon frequencies are also obtained. The LO and TO phonon frequencies of BP compound were found at 866.6and 834.5 cm–1, respectively; these of BAs were found at 731.3 and 727.1 cm–1, respectively; while for the BSb narrow-gap semiconducting compound were found at around 598.3and 586.2 cm–1, respectively. These two later values are in general slightly lower than the calculated values, and the observed Raman spectroscopy values reported in the literature.

Alpha activity emitted from leaves and roots of beetroot plant planted in enhanced soil with fertilizers

This study is to assesses radioactive materials transported to the beetroot plants grow in different fertilized soil. Equivalent weights of fertilizers were added to the soil prior the plantation. The alpha track densities were estimated utilizing solid state nuclear track detector (SSNTDs), CR-39. The obtained results show that alpha track densities in Beetroot plants in the lower and upper sides of plant leaves were varied from 67.62 Tr.cm−2 to 101.83 Tr.cm−2 and from 45.35 Tr.cm−2 to 94.67 Tr.cm−2 with mean values of 89.96 Tr.cm−2 and 68.48 Tr.cm−2, respectively. Alpha track densities were also measured in the samples of the enhanced plantation soil with fertilizers and in the whole parts of the Beetroot plant which were planted in these soils. These values were compared with alpha track densities obtained from fertilizer samples in the previous studies. The lower face of leaves gives higher α-particles activity than that obtained from the upper face. As well as, the alpha activity from the plants planted in soils enhanced with phosphate compost was found greater as contrast with that planted in a soil enhanced with organic fertilizer. The utilization of organic fertilizer don't cause much risks like contrasted with phosphate fertilizers. Therefore, the alpha activity depends on the nature of fertilizers added to the soil.

Dark soliton solutions to (2 + 1)-dimensional Kundu-Mukherjee-Naskar equation via the first integral method

In the present work, the First Integral Method is being applied in finding a non-soliton as well as a soliton solution of the ( 2 + 1 ) dimensional Kundu-Mukherjee-Naskar (KMN) equation which is a variant of the well-known Nonlinear Schrodinger ( NLS ) equation. Using the method, a dark optical soliton solution and a periodic trigonometric solution to the KMN equation have been suggested and the relevant conditions which guarantee the existence of such solutions are also indicated therein.

Geotechnical investigation of road pavement failure along arigidi / oke - agbe akoko, southwestern, Nigeria

Twenty soil samples collected from the failed portions in the study area were air dried for two weeks before analyses. Each soil samples were subjected to eight engineering tests which include: natural moisture content, atterberg limit, specific gravity, compaction, unconfined compressive strength, California bearing ratio, grain size and hydrometer analysis. Results showed that the natural moisture content ranged from 17.7% to 37.8%, liquid limit from 48.5% to 62.4%, plastic limit from 18.3% to 26.8%, plasticity index from 25.7% to 37.7%, shrinkage limit from 5.8%-12.5%, optimum moisture content from 14.2% to 32.4%, maximum dry density from 1301 Kg/rn3 to 2002 Kg/rn3. Soaked California bearing ratio ranged from 5% to 17%, unsoaked from 15% to 38%, specific gravity from 2.5 to 2.68, unconfined compressive strength r from 112.8 Kpa to 259.7 Kpa, shear strength from 56.4 Kpa to 129.9 Kpa and hydrometer analysis from 48.5% to 72.1%. Based on the Federal Government specifications for pavement construction, for the soil to be suitable, stabilization with bitumen, Portland cement, lime, coal fly ash, and saw dust should be done. Road pavement failure along Arigidi – Oke Agbe road was due to poor engineering geological condition of the sub-grade soils and poor drainage systems.