The author designs a genetic algorithm for the layout of well drilling based on partial order relations and establishes a mathematical model for the algorithm. Based on this, ideal results are obtained. The results of numerical experiments show that the algorithm is highly precise and runs at a rapid speed.

This paper presents an experimental study on the effect of three types of water-soluble high molecular weight cellulose ethers on the rheological properties of cement mortars in fresh state. Vane-cylinder test was used to determine the rheological properties of fresh mortars. The flow curves, obtained in the tests, were exploited to determine the rheological parameters, including the yield stress, the consistency coefficient and the fluidity index. The results indicate a difference between the mixes corresponding to the different cellulose ethers at high shear rate, while at low shear rate, all the mortar mixes behaved as a shear thinning fluid. The investigation of the influence of molecular weight on the properties of fresh mortars has shown a similar observation to the reported research in literature. The yield stress of the mortar decreases with the increase of molecular weight. This decrease is not significant at low molecular weights, and becomes much more significant at high molecular weights. Inversely, the mortar consistency is found to increase with the increase of molecular weight.

We investigated numerically on MHD Free Convection Fluid Flow over a Vertical Porous Flat Plate in a Rotating System is Presence of Radiation, Soret effect and Heat Transfer of a heat generation. In this study the governing equations of the problem contains the system of partial differential equations. We solve the obtained non-similar, coupled, non-linear, non-dimensional partial differential equations are numerically by technique of finite difference methods. We investigate the effect various physical parameters such as velocity, temperature and concentration within the boundary layer are presented by Numerical results. The effects of thermal radiation entering into the physical problem are observed. The heat transfer as well as rate of transfer are also shown in graphically. Finally, we compare of the present study with previous published work is embodied in tabular form.

Forest fire and peat fires in Indonesia is an important factor air pollution in Southeast Asia. Emissions from peat fires cause extraordinary impact for human health, visibility, the economy and affect global climate. The low intensity of peat fires can produce large particulates emission, CO and other gaseous compounds. Analysis of physical and chemical properties of smoke from peat fires took samples of peat in the village of Kuala Sekampung, District Sragi, Lampung province, Sumatra-Indonesia, to conduct laboratory scale combustion. The purpose of this analysis is to determine the physical and chemical properties of the smoke from peat fires and lasting drop in visibility and air quality deterioration. Chemical properties in researched is CO, NO, NO2, CO2, SO2, and H2S and physical properties in researched is dustfall, TSP and dust particles. Preparation of Simulation peat fires made for laboratorium scal. Process of cultivation of grass for 6 months. Burning grasses are used as fuel placed on the furnace which is positioned on a closed tunnel so there is no influence of the wind outside. Combustion carried out for 1 hour for each repetition. Instrument for physical properties measurement are dustfall canister and filter whatman 41 for dustfall parameter, High Volume Air Sample and filter Staplex tipe TFAG41 for TSP and petri dish, filter whatmann 41 and digital microcope for calculation of total dust particles. The results showed that from the physical and chemical properties are associated with decreased visibility and air quality deterioration.

The problem with hip replacement technology is a challenging one and no addition to that effort is a wasted venture. The aim of this work considering stainless steel SS316L as the implant material was to investigate theoretically, the interaction at the interface between the two materials in contact (Bone and SS316L) using Hertzian Contact Mechanics Model to ascertain the primary stability of the virtual Prosthetic joint.. Hertzian Contact mechanics was applied for the determination of micromotion at the bone-implant interface, the maximum and the minimum values of micromotion obtained were dmin=73µm and dmax=102µm and when these values were compared with the range of values obtained from literatures, they fell into the range of the recommended values required for good osseointegration. With these values, osseointegration (bone growth) is enhanced, aseptic loosening will not occur and primary stability is ascertained. It also indicates that the prosthesis will not fail within the suggested body weights. The result obtained shows that the assembly has a good initial stability the implant was optimally located and the virtual surgical operation carried out in this work was successful.

This paper is aimed at studying the rate of moisture removal from samples of staple food using a multipurpose convective cabinet dryer. A multipurpose convective cabinet dryer is designed, fabricated and used to study the moisture removal rate of sliced yam, bitter yam, cocoyam, cassava and plantain (A, B, C, D and E respectively) placed in a single layer. These food samples were obtained from eastern part of the country. The samples were dried from initial moisture content of 60.1%, 72.7%, 70.9%, 64.4%, 61.4%, respectively to final moisture content of 0% in five different trays at 60OC air temperature and 2.5m/s air velocity and the weight losses were taken. The moisture removal rate was found to decrease with time and drying process occurred at falling rate period. From the plot of the mass against drying time, it was observed that in general, the reductions in mass of the sliced samples occur at falling rate period. This indicates that the moisture removal from the samples is controlled by the mechanism of diffusion.