In recent years, fires happen frequently, firefighting systems are becoming more and more important, the function of fire fighting centrifugal pump cannot be ignored. In this study, SolidWorks software was used to conduct three-dimensional modeling of centrifugal pump, and the Simulation module in SolidWorks was used, adding external loads at the inlet and outlet of the centrifugal pump，then finite element analysis of centrifugal pump. It can be obtained through analysis, the maximum displacement of the centrifugal pump always appears on the flange, the position of the maximum stress it receives is at the junction of centrifugal pump base and pump shell,the minimum stress is located in the center of the pump shell.The results of this study will provide a basis for further enhancing the stability and reliability of fire pump.

Keywords - Fire pump, Load, Finite element analysis.

Surma River is the prime source for water distribution system in Sylhet city. The main focus of this study is to determine four water quality index along with BOD and COD of Surma River. The control of corrosion is one of the important aspects of safe drinking water supply. The river water quality from Surma River was investigated along the river water flow path in this study. Twelve water samples have been collected from four different points of Surma River in Sylhet city and analyzed for various water quality parameters during November'16. The water quality parameters were related to chemical stability which includes pH, temperature, alkalinity as mg/l, hardness as mg/l and total dissolved solids (TDS) as mg/l, BOD, COD for different samples collected from Surma River within.........

Keywords - Water Quality Indices, Langelier Saturation Index, Ryznar Stability Index, Aggressiveness Index, Puckorius Scaling Index, Corrosion, Scale Formation.

The hydrodynamics of the waters of a river that flows to the sea establish important control in the volume and direction of the watercourse. The study was carried out in the area of the mouth of the São Francisco River between the municipalities of Propriá / SE and Piaçabuçu / AL under São Francisco. For the calibration of the hydrodynamic model, the simulations were adjusted based on the parameters of a field campaign carried out on September 26 and 27, 2015, at the end of the quadrature tide and beginning of the tide of syzygy at which time the waters in oscillations are higher, closing a 12-hour cycle. In the hydrodynamic scenario, the influence of the tide on the flow of the river in areas above Piaçabuçu / AL was observed, which may allow changes in the environmental dynamics and alteration of water quality characteristics in detriment to the control of the flows released by the Hydroelectric Power Plant Cursed

Keywords - Hydrodynamics, Flow, Marine current.

Humans need motivation, momentum, and a reason to get up in the morning and to live for, a goal to work for, a dream to make it reality. Unfortunately, in case of accidents, amputation, and paralysis, all the reasons, goals, and dreams are demolished because the disability. Disability at the beginning is very hard for any human to take and to adapt to. A decade ago, prosthetics were the only solution but also help a small percentage but things have changed, technology has evolved. The rise of "Bionics" in the recent years has prompted some interesting thoughts of the human future, the birth of "Artificial Intelligence" (AI) has facilitated the complex computations for reality simulation, the revolution improvement in surgeries, the unlimited computational resources of the public cloud, and the new communication era of wireless 5G, all combined have given the hope for a new and better future not only to reverse disability........

Keywords - Bionics, Cyborg, Biofabrication, Neuralink, Intelligent Amputation Surgery, Spinal Stimulation.

As the most commonly used vortex flowmeter in flow monitoring and control, it plays an increasingly significant role in the industrial field.Therefore, in order to optimize the design of vortex flowmeter to meet the working requirements, this paper uses CFX calculation and simulation technology to study the flow of gas in the inner channel of vortex flowmeter, and analyzes the distribution of total pressure and static pressure in the inner channel of vortex flowmeter, so as to reveal the internal flow characteristics of vortex flowmeter and provide reference for the analysis of the working characteristics of vortex flowmeter.It is found that the gas flow in the vortex flowmeter is stable and the distributions of the total pressure and static pressure in the inner channel are reasonable.This study provides detailed data for the normal detection and control of the flow of vortex flowmeter.

Keywords - vortex flowmeter; simulation; pressure

In this paper, the stability and oscillatory behavior of the solutions for a model of coupled limit cycle oscillators with delays are investigated. By means of mathematical analysis method, some sufficient conditions to guarantee the stability and oscillation of the solutions are obtained. Computer simulations are provided to demonstrate our results.

Keywords - a coupled limit cycle system, delay, stability, oscillation

Atterberg limits and consolidation tests were carried out on samples of expansive soils derived from Imo Shale (Amuro-Okigwe and Ozu-Abam) and Mamu Formation (Asaga), Anambra Basin, in order to infer their consolidation behaviour. The liquid limits range from 33-56% while the plasticity index value range from 30-31%. The samples used in the test were found to have a dry densities of 1.11Mg/m3 to 1.58Mg/m3. The consolidation swell test on these samples has indicated that the moisture content ranges from 33-51% with an average value of 38% and compression index of the expansive soil falls within the range of 0.73-0.68 (Amuro-Okigwe, 0.73: Asaga, 0.68: Ozu-Abam, 0.73). The results have shown that the samples fall into clay of high plasticity (both) soils with corresponding medium (soil derived from Mamu Formation) and high swelling potentials, (soils derived from Mamu Formation and soils derived from Imo Shale, respectively), and moderate compression index (both soils). Soils with high/medium swelling potentials tend to have moderate/high compression index. Compression index of expansive soils may therefore be used to estimate foundation settlement in expansive soils.

Keywords - Consolidation, Expansive Soils, Atterberg limits, Swelling potential, and Compression index

The use of power transmit small with user load that large can cause an overload on the network, so it is necessary to raise the parameters of the power transmitting. This study analyze transmit power influence on the quality Ec / No and RSCP in relation to traffic intensity. Site 140 744 research results in Jalan Imam Bonjol, Pontianak, shows that for best results use a plot RSCP 448 dBm power in sector 2 with a range of -74 dBm to 0 dBm, the worst result using a Power 430 dBm at 3 sectors with a range of -83 dBm to - 78 dBm and to plot the results of Ec / No best results use 430 dBm transmit power with a range of -4 dBm to 0 dBm, the worst results using 448 dBm transmit power with a range of -9 dBm to -12 dBm. For the calculation of traffic intensity obtained the highest value of 430 dBm transmit power...........

Keywords - Power transmits, RSCP, Ec / No, traffic intensity

In this study, theGoulfey-Tourba sedimentary basin was structurally characterized using satellite gravity data derived from the global geopotential model EGM2008. The interpolation of these data was first carried out by applying the Krigeage algorithm using the Oasis Montaj software. The Bouguer anomaly map obtained has values ranging from -54.1 to 15.4 mGals. This map is divided into two main domains: a domain of negative anomalies characteristic of upper Tertiary sediments, and a domain of relative positive anomaly probably caused by an uplift of basement rocks. Then, the horizontal gradient method was coupled with the upward continuation technique at several depths to highlight the position, direction and dip of major lineaments. A set of 11 lineaments (L1 to L11) from different directions have been listed. The two major lineaments identified have a NE-SW direction. The Euler deconvolution method was also applied to the Bouguer anomaly map with a structural index SI = 0.1 and a window of size 5. This method allowed us to highlight the position and orientation of 14 faults as well as their vertical extension. The position of several faults coincides with the lineaments identified using the horizontal gradient maxima. The structural map could be used to better understand circulation and formation of hydrocarbons. It could also help to update the geological map of our study area.

Keywords - Satellite gravity data, Structural map, Horizontal gradient, Euler deconvolution method, Goulfey-Tourba sedimentary basin

The use ofFiber-reinforced polymerscomposite materials in repairing and strengthening damaged structural parts,especially those made of reinforced concrete, is wide spreads. However, each FRP composite that used in the strengthening of beams must carefullychose, there are many techniques used in the strengthening of beams such as externally bonded reinforcement (EBR) and near-surface mounted (NSM) and FRP composite applied to the surface of the beam in different shape and forms such as U-anchorage, a bottom face, strips, plates, laminates, and sheets. This paper highlights the effect of different FRP composite,and strengthening techniques on the flexural strength of the reinforced concrete beams. The results showed that the flexural strength of reinforced concrete beams...........

Keywords - Aramid, Carbon fiber reinforced polymer,Flexural strengthening, Fiber-reinforced polymer, Glass Fiber-reinforced polymer, Near surface-mounted

The growth of any power system grid in the world always has been on an accelerating speed. Distributed Generation (DG) is an electrical power generation unit that is directly connected to a distribution network or placed as nearly as possible to its consumer. The technologies adopted in distributed generation vary in methods of generation including small-scaled gas turbines, wind, fuel cells, solar energy and hydro… etc [1]. DG is both beneficial to the consumers and utilities, much so in places where centralize generations are unfeasible or where deficiencies can be found in transmission systems. Optimally allocating DG units may address all the issues stated before, resulting in reduced power system losses, improved voltage profile, enhance power transfer capability, reduce pollution and cut generation and transmission cost [3,4]. This paper aims to present the optimum sizing and location of DG in power system by using Particle Swarm Optimization (PSO). Particle swarm optimization...........

Keywords - Electrical power network – Distribution Generation - Particle Swarm Optimization (PSO) - Photovoltaic - Boehm-Spiral methodology

One of the most observed and frequent defections in reinforced concrete slabs is the appearance of cracks, which created due to factors like reinforcement corrosion, overloading, and differential settlement of supports. Strengthening and retrofitting are needed to restore the structural capacity of the distressed elements. There are different techniques available for retrofitting and strengthening of various reinforced concrete structural elements. The current study introduces and discusses five different approaches of repairing cracks and strengthening in concrete slabs that are available and used nowadays, namely; CFRP (Carbon Fibre Reinforced Polymer), Applying ferrocement layer, cement grout, section enlargement, and epoxy injection. Each method discussed briefly, and the properties and procedures of each technique are explained. The efficiency of each method is discussed in accordance...........

Keywords - CFRP, Epoxy injection, Ferrocement, Repairing, and strengthening

The work is about the Development of Hybrid Renewable Energy System for the Electrification of rural areas in cross River State, Nigeria.A Hybrid model comprising Diesel Generator, Battery banks, photovoltaic Panels and wind turbine Generator was proposed to serve remote communities at Yakurr Local Government Area, Cross River State. The human problem of generating individual electricity using private generators at a high cost due to no access to the national grid has been solved. The procedure of this work was the measuring and collection of the basic meteorological data of solar radiation from NASA for Ugep, and then performing components modeling and simulation. Wind speed of 3m/s, regional solar irradiance of 3.697kWh/m2/d andtotal energy demand of 198kwh/d from the rural community were used as input in the study. The method of incremental conductance was used to achieve maximum power output........

Keywords - Photovoltaic, HOMER, Irradiance, Net Present Cost, Unmasking.

Here, the existence and uniqueness of the solution of nonlinear F-VIE is considered, then we use a
numerical method to reduce this type of equation to a system of FIE, Trapezoidal method and Simpson's method are applied to solve the FIE of the second kind with continuous kernel. Error in each case is calculated to elucidate the accuracy of this methods.

Keywords -Two-Dimensional Problems- Nonlinear Fredholm -Volterra integral equation- Trapezoidal and Simpson's methods- polynomials- Continuous kernels

For efficient management in organizations in the administrative area, auditing and accounting regulations are key factors. For this reason, it is essential that the knowledge acquired by students in these areas be firm, and therefore new approaches and forms that new information and communication technologies provide us, especially the use of devices that allow ubiquitous access to information, must be considered in the teaching and learning process. It is important to consider mobile applications as didactic tools in the teaching-learning process.In this work, the different mobile applications that have been used and that can be used in the subjects of accounting and auditing are studied, as well as the analysis of Smartphones as tools to be used in the teaching-learning process............

Keywords - Mobile Applications; Accounting; Auditing; Teaching-Learning; Education

Chlorophyll-a is an optically active compound commonly used as a proxy for phytoplankton biomass in an aquatic environment. In this study, an effort has been made to estimate the chlorophyll-a concentration of the freshwater Lake Bung Binh Thien. A spectral decomposition algorithm was used to determine the chlorophyll-a using the satellite images in September, 2018. Landsat 8/OLI provides data with spatial resolution 30m and has developed the model of regression analysis to define the relationship between chlorophyll-a parameters and NDVI index through the reflectance values of the spectral channels. The analysis results show that there is a strong correlation between NDVI and chlorophyll-a with a high correlation coefficient of R2 = 0.89, and the result of waterline extracting was 153 ha in rainy season.

Keywords - Landsat 8, GIS-Remote Sensing, Bung Binh Thien, Chlorophyll-a.

A unique fish smoking kiln was constructed to use agricultural wastes such as sawdust, palm kernel shell and rice bran as alternative to the usual conventionally used charcoal as energy source for smoking fish. The smoking kiln has an estimated capacity of 40kg of fish/batch with six fish trays and 36 fish hooks. Heat transfer is by conduction and convection. Also, the rotatory wheel and axle on which the fish drying trays are anchored ensured even distribution of heat. Calculation further showed that the kiln has 69.4% energy efficiency and drying period of 10 hours at an average temperature range of 60 – 120oC, depending on the type of agricultural waste used as source of fuel energy. Also determined were the fuel conversion ratio, drying rates and calorific values of the different agricultural waste products. Calorific value of the four agricultural wastes ranged between 16.2MJ/Kg in palm kernel to 30MJ/Kg in charcoal. The drying rates of the sawdust and rice bran ignited in the kiln compared favourably with that of the charcoal and they produced smoked fish similar in dryness and quality with fish smoked with charcoal. Palm kernel had the least drying rate of smoked fish in terms of weight per hour during the 10 hours period of smoking.

Keywords - fish smoking kiln, agricultural wastes, heat transfer, drying rate

This paper describes evaluation and its method for e-learning process at Mongolian University of Science and Technology (MUST). Main aim of this study is to develop the logical structure of structure oriented evaluation for e-learning at MUST. An e-learning is complex system where involved many different groups which has all own pre-defined roles, requirement and expectations in e-learning. For example: Professors are owners of contents, they present pedagogical aspect and more responsible for quality of e-learning contents. IT and multimedia personals are owners of technology, they present technology enhancement aspect and more responsible for added value of technology in the e-learning. University is owner of learning management system and plays role as main administration for whole process.........

Keywords - evaluation, evaluation model, SURE model, e-learning evaluation, structure of evaluation goal.

The inland open aquatics of Indonesia are the second largest in Asia after China. Tank goby is one of the freshwater fish that can be found in Lake Limboto, but is not endemic to Limboto Lake or Sulawesi Island. The purpose of this research is to find out the distribution, biological aspects and management of tank goby in Gorontalo Province. This observation was carried out in August - October 2018 at the Gorontalo Province. Sampling uses the census method. The observation shows that the manggabai fish has a length range of 3.5 cm - 18 cm and weighs in the range of 4 gr - 31 gr. Sex ratio in an unbalanced state and has a negative allometric growth pattern that shows long growth faster than its weight growth. The gonad maturity level of male manggabai fish is dominated by TKG II and III.........

Keywords - Inland Aquatics, Limboto Lake, Glossogobius giuris, Biological Aspects, Management

Coral reefs in Indonesia are very beautiful, unique and complex ecosystems and are a place to live diverse marine life. Wakatobi, is an acronym for the names of four large islands in the southeastern Sulawesi, namely Wangi-wangi, Kaledupa, Tomia, and Binongko, which become an attractive national park with a total area of 1.39 million ha. This study uses primary and secondary data. Primary data collection uses the Line Intercept Transect (LIT) method to determine coral reef cover, and the Underwater Fish Visual Cencus (UVC) method to find out the types of fish associated with coral reefs. Observation of the condition of coral reefs and reef fish was carried out in shallow waters of 3-6 m at ten observation station points. Fragrant Fragrant on. At station 1, station 2, station 3, station 8, and station.........

Keywords - Coral Reefs, Reef fish, Marine Tourism.