Engineering Research and Reviews

The aim of this study was to rehabilitate the gully erosion site and reduce longer term erosion vulnerability in Agulu/Nanka Community. This activity was carried out through some civil works such as construction of concrete drainage system, culverts and silty basin, spikes, rock chutes and stabilization of gully. An engineering design was used for the erosion gully intervention which highlighted on the detailed civil works that were carried out. An environmental and social management plan study was implemented aimed at identifying potential and social impacts that were associated with the rehabilitation as proposed means of minimizing and mitigating them to acceptable level.

Carbon fiber reinforced friction material is formulated by grafting MWCNT-F on its surface. This material combination is investigated in this work by using a wear test apparatus. The surface of CF is chemically inert and hydrophobic in nature and possesses poor bonding strength with polymer matrix. Hence, an attempt is made to improve the bonding behaviour between CF and remaining ingredients. CF surface is modified by grafting multi walled carbon nano tubes functionalized (MWCNT-F) on CF surface. CF content after surface modification is varied in wt% (2%, 3%, 4% and 5%) and mixed with remaining ingredients of friction material. Composite sheets are prepared by using hand layup method. Multi walled Carbon Nano Tubes grafted friction material (MWCRFM), is characterized for SEM. MWCNTs-F on CF surface is observed. Sample specimens are cut from the friction composite sheets and the influence of performance properties like friction, wear, speed, load and time on friction is studied. The behaviour of the samples are also analyzed using regression analysis L9 (3×3) experimental design method for 3 different loads, time periods and speeds. The results reveal that, time and braking pressure plays an important role to control the wear rate and coefficient of friction of the composite. It was also observed that, MWCNT-F grafted on CF specimens for sample M5 (CF 5 wt%) possess less wear rate and high stable coefficient of friction compare to other formulations of materials.

Diamond is a unique material with robust mechanical properties, the electrical and the optical properties of the thin film diamond can be altered as they are deposited using microwave plasma enhanced chemical vapor deposition (MPCVD) method. The thin film diamond can be used both as optical window for certain wavelengths of light and as a reflector, based on the thickness and the deposition parameters of the thin film diamond. In this paper, we are illustrating a 1 µm thin film diamond that we were able to deposit, pattern and etch selectively using standard microfabrication techniques. This patterning of diamond film allows us to create 3D structures using single crystal diamond.

The atomic structure is presented on the basis of the theory of vortex gravitation. The feasibility and calculation of the values of the density and mass of electromagnetic particles are proposed. A calculation is made, which proves that the photon must have mass. In the calculations, some physical characteristics of electromagnetic particles that are accepted by modern physics are refuted.

Investigated directly proportional dependence of the energy end mass of a physical object on the strength of the vortex gravitation, which created the object.

The evidence that the strength of any body provide nuclear forces of gravity. The nuclear force of gravity generated by the essential micro vortices. The vortex creates a pressure gradient in the ether. The pressure gradient is the source of nuclear energy. The nuclear force of gravity on the surface of the cores is equal for all elementary particles.

Are investigated a trajectory of new type in distant, space flights unlike usual trajectories of direct flight to heavenly object (Moon) it is supposed to use asymmetry of a gravitational field and to carry out flight bypassing the most power gravitational impact on the spacecraft. It leads to economy of power for 20-30 %.

This research work evaluates the collapse loads of slab supported on orthogonal side ended frames with column/beam joint fixed. Two frame models were investigated (one with Moment of Resistance of slab (MRS) > Moment of Resistance of beam (MRB) and the other with Moment of Resistance of slab (MRS) < Moment of Resistance of beam (MRB)). A reinforced concrete prototype of 3m*3m*3m frame with a reduction factor of 3 was designed and constructed. A model of it constructed and cast with a micro concrete of 1:6 mix ratio. The models were allowed to cure for 28days before being loaded directly until collapse. The estimated collapse load for slab and beam were 20.36KN/m and 52.27KN/m respectively. The actual collapse loads of the frame models (MRS > MRB and MRS < MRB) were 69.04KN/m and 49.68KN/m respectively. The frame model failed by flexural failure at the beams /column joints. The actual collapse load of 69.92KN and 49.68KN respectively were greater than that of the estimated collapse loads of beam and slab comparably. Also the MRS > MRB frame model is stronger than that of the MRS < MRB frame model.