Engineering Commons^™

Control Of Mr Damper Using Anfis And Pid Controller For Optimum Vehicle Ride Comfort, Mohammad Faisal Yakhni, Mohamad Ali, Mohamed El-Gohary

BAU Journal - Science and Technology

Suspension system design is an important challenging duty that facing car manufacturers, so the challenge has become to design the best system in terms of providing ride comfort and handling ability under all driving situations. The goal of this paper is to provide assistance in enhancing the effectiveness of the suspension system. A full car model with eight Degrees Of Freedom (DOF) was developed using MATLAB/Simulink. Validation of the Simulink model was obtained. The model was assumed to travel over a speed hump that has a half sine wave shape and amplitude that changing from 0.01 to 0.2 m. The …

Antibacterial Effect And Phytochemical Analysis Of The Shoot System Of Rubus Canescens Dc. Growing In Lebanon, Omar Assafiri, Hiba Abdallah, Mohammed El-Dakdouki

BAU Journal - Science and Technology

The misuse of antibiotics followed by improved fitness of resistant strains of infectious microorganisms hindered the efficacy of many known antimicrobial agents, and fueled research for the discovery of novel remedies. The current study aims at assessing the antimicrobial activity and understanding the mechanism of action of Rubus canescens DC. growing wild in Lebanon, as well as qualitatively determining its phytochemical profile. The antibacterial activity, MIC, and MBC of the extracts were evaluated by two-fold dilution. Time-kill curves were plotted to assess the bactericidal activity of the R. canescens DC. extracts against the growth of microorganisms, and TEM images were …

Waterpipe: A Global Alarming Problem, Tarek Houri, Bilal Osta, Sara Mobayed, Rayan Farha, Mazher Issa

BAU Journal - Science and Technology

Waterpipe popularity has increased significantly in the recent decades to become the major cause of death worldwide. This practice, which is also known as hookah, shisha and Narghile that is based on tobacco burning, increases the percentage of tobacco smokers especially among young people, due to several factors such as the attracting effect of sweetened tobacco, the marketing role and the social acceptance of waterpipe. A literature review was constructed using "Pub med" as a searching tool to confirm by studies the differences in adverse effects between waterpipe and cigarette by analyzing the toxicant’s levels generated from them, evaluating the …

Moringa Oleifera Leaves Aqueous Extract Induce Apoptosis In Ht29 Cell Line, Farah Reda, Jamila Borjac, Julnar Usta

BAU Journal - Science and Technology

Moringa oleifera (MO) tree has been recognized for the nutritional and medicinal values, attributing anti-inflammatory, antioxidants, and antidiabetic activities of the alcoholic and/or water extracts to its various parts. Recent research has focused on therapeutic anti-cancerous effects of the water extract of MO leaves (MOE), commonly consumed as hot beverage. In-vitro cytotoxicity on esophageal, lung, and breast cancer cells were reported by MOE. The aim in this study is to investigate the anti-cancerous potential of MOE on the colon carcinoma HT29 cells. MO water extract (MOE) was prepared at concentrations (0.1%-0.5%). MOE anti-proliferative effect on HT29-cells was assessed by measuring …

Photoluminescence Spectroscopic Studies Of Mn2o3/Co3o4-Glucose/Lactose Complexes, Alaa Abdallah, Jamalat Al Boukhari, Rana Najjar

BAU Journal - Science and Technology

As nanoparticles serve as mediators in the electron transfer between biomolecules and a biosensor’s electrode surface, this study is dedicated to investigating Mn2O3 and Co3O4 nanoparticles and their photoluminescence effect that play a critical role in sensing glucose and lactose. The chemical coprecipitation method was adopted for preparing the nanoparticles that were characterized by X-Ray Diffraction, Transmission Electron Microscope, Fourier Transform Infrared spectroscopy, Energy Dispersive X-ray, UV-vis spectroscopy, and Vibrating Sample Magnetometry. It was found that the obtained Mn2O3 and Co3O4 nanoparticles were successfully prepared, with a crystallite size of 65.91 and 58.00 nm, respectively. The high specific surface area …

Activation Of Fly Ash To Stabilise Lead Contaminated Soils And Solutions, Mabrouk Hassan Arhoma

BAU Journal - Science and Technology

The role of pH on removal of metal contaminated solution was investigated by adding gradually drops of NaOH to lead solutions, the increase of the pH was observed and concentration of lead solution was measured by using ICP. The activated \ pulverised fly ash (PFA) was used as stabilizing material. The leaching behaviour of lead was investigated using 5 grams of the soil thoroughly mixed with 0.1g of the stabilising material in a polypropylene container to which 50ml of either deionised water; the mixture was shaken on a flat bed shaker for 2h, and then filtered using a What man …

Corrosion Of Coated And Uncoated Steel Reinforcement In Concrete, Jana Abou Shakra, Rouba Joumblat, Jamal Khatib, Adel Elkordi

BAU Journal - Science and Technology

Corrosion of reinforcing steel is the one of the main causes of deterioration in reinforced concrete structure. During the initial stage of corrosion, the steel volume increases. This creates tensile stresses in the concrete, which can eventually lead to cracking, delamination, and spalling. This potential risk of corrosion in a structure is quite unpredictable. Therefore, this paper examines the influence of accelerated corrosion on the bond between concrete and the coated and uncoated steel bars. The bar coating consisted of epoxy rich in zinc. Six concrete mixes were prepared. Three mixes had cement contents of 300, 400 and 500 Kg/m3 …

Effect Of Using Cathode-Ray Tubes (Crt) Waste Glass On Concrete Properties, Jad Bawab, Jamal Khatib, Ali Jahami, Said Kenai, Adel Elkordi

BAU Journal - Science and Technology

Cathode-ray tube (CRT) glass is a hazardous material that should be responsibly managed when disposed. One of the possible options for recycling CRT waste glass is using it as fine aggregates in concrete for its richness in silica. For the aim of evaluating concrete with this material, four mixes with replacement levels of 0%, 10%, 20% and 30% are prepared. Workability, hardened density, ultra-pulse velocity, compressive strength, tensile strength, and static modulus of elasticity were examined. Experimental results showed that the use of CRT improved properties of concrete at certain replacement levels. CRT glass improved the workability of concrete where …

Concrete Mix Design Using Simple Equations, Hakim Abdelgader, Ramadan Suleiman, Abdalla Adam, Jamal Khatib

BAU Journal - Science and Technology

The behaviour of concrete, whether fresh or hardened, depends basically on the behaviour of its components and the relationship between them, therefore, obtaining a concrete with certain properties depends fundamentally on the concrete mix design. Concrete mix design generally includes two main steps: 1-Selection of the main components suitable for the concrete (cement, aggregate, water, and additives); 2-Determination of more economical mix ratios to fulfil the workability, strength and efficiency requirements. Currently, there are many international methods locally approved for mix designs. They are all related to each other, they give relatively the same quantities of the mix components and …

Essential Control To Environmental Regulations For Oil And Gas Industry: Spotlight On Drilling Processes In Lebanon, Rami Harkouss

BAU Journal - Science and Technology

At present, environmental legislation bounds the drilling operators in drilling wastes removal. The rapid increasing sensitivity of drilling waste management forced many countries to develop environmental guidelines for their drilling operations. This research studies some sorts of waste produced during upstream petroleum activities, particularly while drilling. After that, many hazards and impacts on the environment are addressed, as well as their principal treatment techniques. This paper gives a modest and theoretical vision over the present environmental standard and waste management design, realized at a universal scale. Studies show that performance fluid management and total fluid management are highly recommended in …

Sensitivity Analysis Of An Agent-Based Simulation Model Using Reconstructability Analysis, Andey M. Nunes, Martin Zwick, Wayne Wakeland

Complex Systems Faculty Publications and Presentations

Reconstructability analysis, a methodology based on information theory and graph theory, was used to perform a sensitivity analysis of an agent-based model. The NetLogo BehaviorSpace tool was employed to do a full 2^k factorial parameter sweep on Uri Wilensky’s Wealth Distribution NetLogo model, to which a Gini-coefficient convergence condition was added. The analysis identified the most influential predictors (parameters and their interactions) of the Gini coefficient wealth inequality outcome. Implications of this type of analysis for building and testing agent-based simulation models are discussed.

Examining Bicycle And Motorized Vehicle Speeds And Their Relationships In The Context Of Urban Roadways, Jaclyn Sue Schaefer

Dissertations and Theses

This thesis presents a compilation of papers exploring passenger car and bicycle speeds through their interactions with each other and with urban roadway factors.

First, following a concern raised in part of the traffic literature that a large mode shift toward bicycling may cause travel time delays and potentially exacerbate congestion instead of alleviate it unless bicycle lanes are installed, an empirical study detailing how the presence of bicycles on urban roads without bicycle lanes may affect passenger car speeds is presented. Pneumatic tube data from six predominantly low speed, low volume roads in Portland, Oregon were utilized to identify …

Comparison Of Popular Three-Dimensional Printing Materials For Oral And Maxillofacial Surgical Guidance Model, Mohammad Adhitya, Sunarso Sunarso, Abdul Muis

Journal of Dentistry Indonesia

The application of three-dimensional (3D) models in the medical field has become popular. However, the accuracy of 3D models for surgical guidance varies among different materials and 3D printing technologies, such as printing machine usage. Objectives: This study aims to obtain more information about the effect of three different materials printed using a fused deposition material printer from the same digital data source. This study also aims to compare, analyze, and test the materials’ ability. Methods: Each of the filament materials (acetylbutane stearate [ABS], polylactic acid [PLA], and high-impact polystyrene [HIPS]) are printed at two infill densities, their weight, volume, …

Significant Contribution Of Mobile Apps To The Development Of Tourism In Uzbekistan, Alimjon Dadamuhamedov Irgashevich

The Light of Islam

Recently, Uzbekistan has taken comprehensive measures to develop tourism as one of the strategic sectors that contribute to the rapid development of regions, increase incomes and living standards of the population, as well as increase investment attractiveness. Modern information technologies make a signifcant contribution to the development of pilgrimage tourism. Advertising of online travel services in pilgrimage tourism currently does not allow you to automate the work of a travel Agency without creating an effective website. This article is devoted to the analysis of Internet technologies aimed at improving the tourism industry. The practical signifcance of the article lies in …

Optimal Conditions Of Fermentation Of The Pichia Pastoris Yeast Expressing The Recombinant Pres2-S Protein (M-Hbsag) Of Hepatitis B Virus (Hbv), Sasmakоv Sobirdjan, Ashirоv Оybek, Abdurakhmanоv Jaloliddin, Xasanоv Shuhrat

CHEMISTRY AND CHEMICAL ENGINEERING

The aim of this study is determination of optimal fermentation conditions of the Pichia pastoris yeast expressing the recombinant Pres2-S protein of hepatitis B virus (HBV). For this purpose we investigated the main factors influencing for the cultivation of recombinant strain of the yeast Pichia pastoris pPIC3,5-S-HBsAg - the composition of the nutrient medium, pH and dissolved oxygen (DO). As a result, by enzyme-linked immunosorbent assay (ELISA) the optimal concentration of methanol ≈1.0 %, which is the initiator and the only source of carbon for protein expression in the Mut+ phenotype Pichia pastoris yeast cells was determined. In the selected …

Waste Engine Oil Regeneration With Bentonite From The Navbahor Deposit, Azimova Shodiyakhon, Arslanov Sharafutdin, Turakhujayev Saidakbar, Azimov Dilmurod

CHEMISTRY AND CHEMICAL ENGINEERING

The aim of the study was the regeneration of used oils. The change in the conditions for the regeneration of used engine oil as a result of adsorptive cleaning with alkaline earth clay from the Navbakhor deposit has been studied. The carried-out regeneration allows almost completely removing mechanical impurities, moisture from the waste oil and helps to clarify it. The optimal conditions for regeneration have been established. The removal of secondary products formed during the use of engine oil while retaining the main components that determine the serviceability of the product has been established. By means of IR spectroscopy, as …

Mixed Complex Compounds Of Palmitate, Oleate Calcium With Acetamide, Nicotinamide And Thiocarbamide, Ibadullaeva Tursunoy, Azizov Tokhir, Ibragimova Мavluda

CHEMISTRY AND CHEMICAL ENGINEERING

The purpose of the study was the synthesis and study of the structure of mixed complexes of palmitate, calcium oleate with acetamide, nicotinamide and thiocarbamide. The mixed coordination compounds of palmitate and calcium oleate were synthesized. The composition, individuality, thermal behavior, methods of coordinating the palmitate and oleate fragments, acetamide, nicotinamide and thiocarbamide molecules have been established. Comparison of the diffraction patterns of calcium palmitate and oleate, free ligand molecules and synthesized compounds showed the mismatch of the diffractograms, conseqently that the synthesized complexes have an individual crystal lattice different from the starting materials. The method of coordination of amide …

Synthesis Of Esters Of Halogenoacetic Acids, Yuldasheva Muxabbat, Turaev Sherzod

CHEMISTRY AND CHEMICAL ENGINEERING

Amidoalkylating reagents containing a phthalimide group are used in the synthesis of hard-to-reach primary amines and complex heterocyclic compounds. These types of amidoalkylating compounds are suitable reagents for nucleophilic substituted reactions in acidic media due to their resistance to acids. Result of reactions of amidoalkylating reagents-N-hydroxyethylphthalimide and N-hydroxymethylphthalimide with aliphatic carbonic acids can also produce new bactericidal and fungicidal esters. In this study, halogen acids reacted with N-hydroxymethylphthalimide monochloric acetic acid, monobromic acetic acid, monoiodic acetic acid, trifluoric acetic acid and trichloroacetic acid, as well as, N-b-hydroxyethylphthaleidyl monohydric acid. As a result of the reactions, new phthalimidomethyl and phthalimidoethyl esters …

Optimization Composition Of The Wood-Polymer Composition Based On Polyvinylchloride, Aliyev Sunnatulla, Ilkhamov Giyos, Jurayev Asror, Magrupov Farkhad

CHEMISTRY AND CHEMICAL ENGINEERING

The objective of the reaserch is to elaboration the composition of a wood-polymer composition based on polyvinyl chloride with improved performance properties. The influence of the components of the composition - modifiers, lubricants, regulators and stabilizers - on the properties of the composition was researched. Optimization of the composition of wood-polymer composition based on PVC made it possible to obtain a material with higher strength and fire resistance.

Synthesis Of High-Strength Ceramics Based On Technogenic Waste Containing Aluminum Oxide, Shermatov Zhavokhir, Aripova Mastura, Paizyllakhanov Mukhammade-Sultankhan

CHEMISTRY AND CHEMICAL ENGINEERING

The aim of this work is to synthesize wear-resistant and heat-resistant ceramics based on aluminum oxide. The man-made aluminum-containing waste of the Shurtan gas chemical complex was used as a source of aluminum oxide. In the work, the dependences «composition-structure», «composition-property» and «property-size of particles» were obtained, obtained by the method of heliomaterials science, namely by melting raw materials in a stream of concentrated solar radiation of high density (350 W/cm2) with subsequent quenching of the melt into water (103 deg/s). It is shown that the wear resistance and heat resistance of the material sharply increase when the content in …

High-Efficient And New Technology For Producing 5-Nitro-2-Acetylaminobenzimidazole, Saidov Sarvar, Abdurazakov Askar, Karimov Rikhsibay, Khvan Alla

CHEMISTRY AND CHEMICAL ENGINEERING

The aim of this work is to create new veterinary products for agriculture based on local raw materials, to develop a highly efficient technology for their production. Waste from the production of medamine produced in the pilot production of the Institute of Plant Chemistry of the Academy of Sciences of the Republic of Uzbekistan. The process of synthesis of 5-nitro-2-acetylaminobenzimidazole was studied by one-factor experiments. The structure of the obtained product was investigated by IR, Mass, 1H, 13C NMR spectroscopy. The main factors influencing the process of obtaining 5-nitro-2-acetylaminobenzimidazole were revealed. On the basis of the obtained research results, a …

Low-Resistance Bi/Pb Ceramics Containing Ts = 295К-315k Phases Synthesized In A Solar Furnace (Parkent), Gulamova Dilbara, Gulamov Timur

CHEMISTRY AND CHEMICAL ENGINEERING

The aim of this work is to obtain bulk textured superconducting ceramics based on glass-crystalline precursors of the Bi1.7Pb0.3Sr2Ca(n-1)CunOy (n=5-9) series. Technologies for obtaining superconducting materials are presented. The advantages of melt methods and “Super Fast Aloys Quenching–T” technology is shown. Compositions, methods of synthesis and study of properties of precursors and ceramics obtained by solar energy are presented. The interrelation of the morphology of glass-crystalline precursors and superconducting ceramics based on them is revealed. It is shown that nano-sized nuclei are the basis on which superconducting phases with Ts = 295-315K are formed as a result of the peritectic …

Carbon Nanotube–Liposome Complexes In Hydrogels For Controlled Drug Delivery Via Near-Infrared Laser Stimulation, S. Zahra M. Madani, Mohammad Moein Safaee, Mitchell Gravely, Carolynn Silva, Stephen Kennedy, Geoffrey D. Bothun, Daniel E. Roxbury

Chemical, Biomolecular, and Materials Engineering Faculty Publications

Externally controllable drug delivery systems are crucial for a variety of biological applications where the dosage and timing of drug delivery need to be adjusted based on disease diagnosis and progression. Here, we have developed an externally controllable drug delivery system by combining three extensively used platforms: hydrogels, liposomes, and single-walled carbon nanotubes (SWCNTs). We have developed carbon nanotube–liposome complexes (CLCs) and incorporated these structures into a 3D alginate hydrogel for use as an optically controlled drug delivery system. The CLC structures were characterized by using a variety of imaging and spectroscopic techniques, and an optimal SWCNT/lipid ratio was selected. …

A Time Series Sustainability Assessment Of A Partial Energy Portfolio Transition, Jacob Hale, Suzanna Long

Engineering Management and Systems Engineering Faculty Research & Creative Works

Energy portfolios are overwhelmingly dependent on fossil fuel resources that perpetuate the consequences associated with climate change. Therefore, it is imperative to transition to more renewable alternatives to limit further harm to the environment. This study presents a univariate time series prediction model that evaluates sustainability outcomes of partial energy transitions. Future electricity generation at the state-level is predicted using exponential smoothing and autoregressive integrated moving average (ARIMA). The best prediction results are then used as an input for a sustainability assessment of a proposed transition by calculating carbon, water, land, and cost footprints. Missouri, USA was selected as a …

Mimo Antenna For Fifth Generation Mm-Wave Applications: A Bibliometric Survey, Rajeshwari R. Malekar, Laxmikant K. Shevada, Hema D. Raut, Amruta S. Dixit, Sumit Kumar

Library Philosophy and Practice (e-journal)

Nowadays most discussed technology is mm-wave and 5G communication. The requirement of 5G technology is high bandwidth, high data rate, and low latency. To fulfil these requirements for the current growth in mobile communication multiple input multiple output antenna is used. This bibliometric paper throws light on the various methods used to improve mutual coupling between multiple antennas. Various mutual coupling reduction techniques that are used in MIMO antennas like Dielectric resonator antenna, Electromagnetic Bandgap Structure, Neutralization lines, Defected Ground Structures, Metamaterial, etc. are explained. Scopus database is used for this bibliometric review on mm-wave MIMO 5G technology from the …

Bibliometric Review Of Mppt Algorithms For Wind Energy Conversion Systems, Jayshree Ashok Pande, Paresh Nasikkar

Library Philosophy and Practice (e-journal)

The existing conventional fuels are going up in prices and going down in availability. This has boosted the demand for renewable resources like wind energy. Wind energy being abundantly available is becoming very popular as it is a freely available pollution-free green energy. Some technical aspects like the tracking of maximum power from the wind energy conversion systems have a very high impact on the efficiency of the wind energy conversion systems. Several algorithms have been implemented for tracking the maximum power point of the wind energy conversion systems. The main objective of this paper is to study the extent …

Hydraulic Elevator For Purification Of Water Supply Facilities Of The Reservoir, F.Sh. Shaazizov

Irrigation and Melioration

To clarify the granulometric composition of the deposited sediments at the inlet head of the water intake of the outlet of the Tupolangskiy reservoir, samples of bottom sediments were taken and their granulometric composition was analyzed in laboratory conditions. Near the water area of the water intake of the 1st tier of the Tupolang reservoir, the deposited sediments are represented by smaller particles, the diameter of which ranges from 5 mm to 0.1 mm and their percentage is 95%. The main results on the calculation and substantiation of the parameters of the hydraulic elevator for cleaning the water area of …

Results Of A Numerical Study Of Currents In The Vicinity Of A Damless Water Intake, D.R. Bazarov, O.F. Vokhidov, M. Tashkhanova, F. Uljayev

Irrigation and Melioration

The problem of sustainable water intake in the conditions of significant fluctuations of flow rates and water level is significantly exacerbated by erosion of river beds. A typical example of such conditions is the damless water intake into the Karshi Main Canal (KMC) where the main flow of the Amudarya river continuously moves along a wide floodplain, changing the direction of currents. As a result, it is very difficult to withdraw the required volume of water from the river to the canal especially during dry years due to the high instability of currents at the entrance to the canal. Within …

Prospects For Solving The Problem Of Rational Use Of Water Resources Using The Tiiame-1 Sprinkling Machine, M.Kh. Khamidov, A.R. Muratov

Irrigation and Melioration

The information published by the International Commission on Irrigation and Drainage, and the intermediate results of many years of research carried out by scientists from TIIAME on the development, research and implementation of water-saving technologies in agriculture are presented. The acute shortage of water resources in Central Asia, the problems of increasing the efficiency of the use of water-saving technologies around the world have led to the careful use of available water resources in the region, including the prospects and advantages of using irrigation of crops by sprinkling, as well as the design and technical parameters of the sprinkler developed …

Inadequacy Of Current Water Use Planning At The Level Of Water Users And Wuas, A.A. Alimdjanov, A.Kh. Karimov, B.R. Nasibov

Irrigation and Melioration

This paper studies the main issues of water use planning at the level of water consumers and water user associations (WUA). The study carried out in Bulakbashi district of Andijan province of Uzbekistan, where the main source of irrigation water is the Southern Fergana Main Canal. The study followed two-stage procedure. During the first stage we compiled water use plans for the WUA and water consumers based on the applied methodology of water use planning. Then, at the second stage, we analyzed the results of the actual implementation of the farm water consumption plans and WUA water use plan, and …