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Articles 1 - 30 of 123
Full-Text Articles in Other Civil and Environmental Engineering
Design And Development Of An Inert Controlled Environmental Chamber For Evaluation Of Contaminant Mass Transfer, Brian Magnuson, Zachary Limaye
Design And Development Of An Inert Controlled Environmental Chamber For Evaluation Of Contaminant Mass Transfer, Brian Magnuson, Zachary Limaye
The Journal of Purdue Undergraduate Research
No abstract provided.
Modeling Of Equilibrium Shoreline Of Headland Bay Beaches, Mohamed Ahmed Elmarakby, Ahmed Elshinnawy, Bakenaz A. Zeidan
Modeling Of Equilibrium Shoreline Of Headland Bay Beaches, Mohamed Ahmed Elmarakby, Ahmed Elshinnawy, Bakenaz A. Zeidan
Journal of Engineering Research
Engineering tools for predicting a long-term reaction of beaches include equilibrium beach formulations. They are used to assess how human interference (protection works, breakwaters, ports etc.) has affected the shoreline reaction since they Specify the final orientation of a beach on a time scale of years. One of the equations for determining the Static Equilibrium Planform (SEP) of Headland Bay Beaches (HBBs) that can be found in the literature is the Parabolic Bay Shape Equation (PBSE). The placement of the down-coast control point (Po), which is the down drift limit from which the PBSE is applied, has a …
Preliminary Water Quality Assessment Using Canadian Water Quality Index Of Ras El-Ain Ponds, South Lebanon, Hussien Ali Fayad, Safaa Baydoun, Mohamad Reda Soliman
Preliminary Water Quality Assessment Using Canadian Water Quality Index Of Ras El-Ain Ponds, South Lebanon, Hussien Ali Fayad, Safaa Baydoun, Mohamad Reda Soliman
BAU Journal - Science and Technology
Water quality deterioration in Lebanon is a pressing national issue and there is a high need for continuous water quality assessment and monitoring of water bodies in the country. This study aims at assessing water quality of Ras El-Ain Ponds, a major natural water resource for domestic use in Tyre district, South Lebanon by using the widely applied Canadian Council of Ministers of the Environment Water Quality Index (CCME WQI). Sampling was conducted during February-March, 2023 and physiochemical and microbiological water quality parameters were determined using standardized methods. Assessed parameters in our study are temperature, turbidity, electrical conductivity (EC), total …
Analysis Of Evolution And Morphology Of Urban And Road Networks: Case Study Lebanon-Nabatiyeh Area, Amal Al Ghorayeb, Adel Elkordi, Ghaleb Faour, Zeinab Jaber, Youssef Attallah
Analysis Of Evolution And Morphology Of Urban And Road Networks: Case Study Lebanon-Nabatiyeh Area, Amal Al Ghorayeb, Adel Elkordi, Ghaleb Faour, Zeinab Jaber, Youssef Attallah
BAU Journal - Science and Technology
This study examines the morphology and evolution of urban and road networks and their relationship with topography in the Lebanon-Nabatiyeh area, by using GIS and remote sensing data. and calculate the annual urban growth percentage rate. The results reveal a clear relationship between the morphology of urban and road networks and their evolution over four periods, as well as the influence of the surrounding topography on their configuration. The study recommends that urban areas should be developed in areas with a slope range of 15º or more to improve the urban structure and infrastructure surrounding them. Understanding the evolution and …
Methods And Surface Materials Repair For Concrete Structures – A Review, Lelian W. Elkhatib, Adel Elkordi, Jamal Khatib
Methods And Surface Materials Repair For Concrete Structures – A Review, Lelian W. Elkhatib, Adel Elkordi, Jamal Khatib
BAU Journal - Science and Technology
Concrete is a very critical material that may require maintenance and possible repair periodically, especially in important structure such as bridges. In general, concrete in structures (e.g. reinforced concrete) may be subjected to cracks due to a variety of reasons. These include, design and external environments such as the ingress of harmful ions into the concrete, unexpected extra loads including earthquakes. These cracks can affect not only the appearance of the structure but more importantly the structural performance of concrete and the integrity of the concrete structure. Therefore, when cracks occur a proper repair method should be selected, based on …
Mechanical And Durability Properties Of Fly Ash Geopolymer Concrete – A Review, Ali Shebli, Jamal Khatib, Adel Elkordi
Mechanical And Durability Properties Of Fly Ash Geopolymer Concrete – A Review, Ali Shebli, Jamal Khatib, Adel Elkordi
BAU Journal - Science and Technology
Geopolymers have emerged as a promising alternative for Ordinary portland cement (OPC) in construction industry, due to their potential to minimize the emissions of carbon dioxide (CO2) and improve the efficiency of waste recycling. This paper aims to study the fresh and hardened properties of fly ash geopolymer concrete (GPC), as well as to review the raw materials used in the production of geopolymers. Several factors impact the mechanical and durability properties of fly ash GPC, including the specific type of fly ash utilized, the curing temperature, the alkaline activator (AA) concentration, and the type of AA used. …
Evaluation Of The Effect Of Mls Density Level Data On Dem, Essam Ghanem, Mostafa Rabah, Fekry Ashraf
Evaluation Of The Effect Of Mls Density Level Data On Dem, Essam Ghanem, Mostafa Rabah, Fekry Ashraf
Mansoura Engineering Journal
Mobile laser scanning (MLS) systems are quickly establishing themselves as the primary source of high-quality digital elevation models (DEM). Data density is the key element that determine the quality of DEMs. Moreover, point density acts a vital role in MLS operation planning and MLS project's cost. This study's goal was to evaluate the impact of point density from MLS on creating DEMs and the accuracy of computed volume in different interpolation methods. The finding demonstrated that the DEM's quality and the volume are more impacted by density level and interpolation method. Interpolation methods are affected by point density. There is …
Numerical Investigations Of Gfrc Beams Strengthened In Shear With Innovative Techniques, Marwa H. Bondok, Gamal I. Khaleel, Ahmed S. Debaiky, Mohamed H. Makhlouf
Numerical Investigations Of Gfrc Beams Strengthened In Shear With Innovative Techniques, Marwa H. Bondok, Gamal I. Khaleel, Ahmed S. Debaiky, Mohamed H. Makhlouf
Mansoura Engineering Journal
This paper discusses the Finite Element analysis (FE) conducted to predict the behavior of Glass Fiber Reinforced Concrete (GFRC) beams without shear reinforcement (stirrups) and strengthen them with proposed techniques to increase their shear strength. for this study, A total of eighteen (18) (120 * 300 * 2200 mm) specimens were modeled using Ansys™ mechanical. The main variables were the percentage of discrete glass fiber in the concrete (0.0, 0.6, and 1.2%), the type of main reinforcing bars (steel or GFRP), the shear strengthening material (GFRP or steel) links, the strengthening systems (side near-surface mounted (SNSM) bars, externally bonded (EB) …
Gömböc The Great, Indigo M. Strickert, Lori E. Bradford
Gömböc The Great, Indigo M. Strickert, Lori E. Bradford
The STEAM Journal
A sonnet written about the mathematics behind the self-righting shape of some tortoise shells.
Mechanical And Durability Properties Of Geopolymer Concrete – A Review, Lelian Elkhatib, Fadi Al Aridi, Adel Elkordi, Jamal Khatib
Mechanical And Durability Properties Of Geopolymer Concrete – A Review, Lelian Elkhatib, Fadi Al Aridi, Adel Elkordi, Jamal Khatib
BAU Journal - Science and Technology
Owing to the ongoing increase in human population, there is a need for more construction projects including residential buildings and other amenities. Concrete is by far the dominant material used in construction and cement is a main ingredient. Cement manufacture is an energy intensive process and emit large amounts of carbon dioxide into the atmosphere. A reduction in the amount of cement used in construction is greatly beneficial. The use of geopolymer or alkali activated materials can serve this purpose as it attempts to totally replace cement in concrete. Geopolymers are materials that consist mainly of silica and alumina materials …
Mathematical Model Of The Efficiency Of Investments Aimed In The Implementation Of Water-Saving Technologies
Irrigation and Melioration
In Uzbekistan, research work is being carried out aimed at improving the economic mechanisms for the introduction of water-saving technologies for irrigating agricultural crops. At the same time, the issues related to the analysis of the effectiveness of the use of water-saving technologies when irrigating cotton, the development of mathematical methods for assessing the effectiveness of investments, as well as their introduction into practice have not been sufficiently studied. This article provides a mathematical model of the efficiency of investments aimed at introducing water-saving technologies. The results of a numerical experiment of a mathematical model show that the introduction of …
Efficient Use Of Water Resources In The Basins Of Small Rivers, F. Gapparov, M.F. Gafforova
Efficient Use Of Water Resources In The Basins Of Small Rivers, F. Gapparov, M.F. Gafforova
Irrigation and Melioration
The article provides a recommendation for the efficient use of water resources in the basins of small foothill rivers. The research was carried out on the example of the Govasay river basin located in the northern part of the Fergana Valley. The efficiency factor of the canal has been determined and a technical assessment has been given for the management of water resources in the river basin; the efficiency of the canal is 65-75%. A program for the operational management of water resources in The Govasay river basin and a GIS map of water consumers in the Govasay river basin …
Model Of Groundwater Level Control Using Horizontal Drainage, A. Arifjanov, M. Otaxonov, Z. Abdulkhaev
Model Of Groundwater Level Control Using Horizontal Drainage, A. Arifjanov, M. Otaxonov, Z. Abdulkhaev
Irrigation and Melioration
The article describes the main factors affecting the rise in the level of groundwater in the city of Fergana and ways to eliminate them. Currently, in order to reduce the negative impact of rising groundwater levels on the environment, crops, buildings and structures, as well as underground utilities, it is proposed to design horizontal drainage in urban areas and a mathematical model has been developed for changing the groundwater level. For this, long-term data from observation wells were analyzed and the hydraulic parameters of horizontal drainage were selected taking into account the hydrogeology of the area. Taking into account the …
Results Of Proximate Analysis Of Energy Use Of Municipal Solid Waste, N.N. Abduganiev
Results Of Proximate Analysis Of Energy Use Of Municipal Solid Waste, N.N. Abduganiev
Irrigation and Melioration
In the modern industrialized world, various raw materials are processed and used for human consumption. While some of the raw materials are converted into the desired product, the rest is thrown into the environment as waste. It is known that solid waste is a type of biomass that is formed in the course of human life. The article presents the results of a preliminary analysis of studies on the use of solid waste energy in the Urta-Chirchik district of the Tashkent region. Sorting results showed that the total volume of municipal solid waste in the district consists mainly of wood …
Shredding Of Cotton Stalks Under The Action Of Toothpicks In A Combined Unit, B. Khudayarov, U. Kuziev, B. Sarimsakov, М. Kholbutaev
Shredding Of Cotton Stalks Under The Action Of Toothpicks In A Combined Unit, B. Khudayarov, U. Kuziev, B. Sarimsakov, М. Kholbutaev
Irrigation and Melioration
The article presents materials devoted to the justification of the parameters of the crown-wheel of the combined aggreagate. The technological process of work and the design of the working part, which is crushed by crushing cotton stalks, without breaking them, laying them on the movement of the unit, has been substantiated and developed. The optimal parameters of the crown-wheel and the tooth are determined by solving the regression equations that determine the optimal values of the vertical load on the teeth and its working quality. The results of theoretical and experimental research show that the amount of crushing of cotton …
Influence Of Electrophysical Methods On The Processes Of Root Formation Of Grapes, N.M. Markayev
Influence Of Electrophysical Methods On The Processes Of Root Formation Of Grapes, N.M. Markayev
Irrigation and Melioration
The article describes the possibilities of electrophysical processing before planting cuttings during vegetative cultivation of grape seedlings. The processes of root formation in cuttings using the electrophysical method in the article Acceleration of the process of root formation in cuttings of black raisins, treated at 71 V/m and an electric field strength of 15 hours, and an increase in the viability, quality, growth and survival of rooted seedlings up to 16.67-34% Presented the results of experiments on the increase and methods of electrotechnological processing of grape cuttings. The result of the study is the analysis and results of the processes …
Conditions, Criteria And Principles For Creating An Agri-Cultural Land Market In Uzbekistan, A.R. Nurnazarov
Conditions, Criteria And Principles For Creating An Agri-Cultural Land Market In Uzbekistan, A.R. Nurnazarov
Irrigation and Melioration
The article analyzes the prerequisites for creating a market for agricultural land in the Republic of Uzbekistan, special attention is paid to land reform, land degradation (reduction of the bonitet score from 60 in 1991 to 50 or more at present, pasture degradation by 20-30%) and increase in economic from their use, the role of land rent in payments for land. 6 basic principles for creating a land market have been established and systematized, the relationship between X-rays and water in the irrigated farming zone, the role of the market in increasing the efficiency and effectiveness of the use of …
Economic Assessment Of The Effect Of Family Income On Students' Disciplines, Sh.A. Muratov
Economic Assessment Of The Effect Of Family Income On Students' Disciplines, Sh.A. Muratov
Irrigation and Melioration
The importance of higher education in scientific research, its role in poverty reduction and population growth has been studied theoretically. Also, when using the data of social surveys conducted by 538 respondents (students) studying in higher education institutions, they were awarded the Order of the logistics regulator in the economic assessment of the factors influencing the rate of mastery of disciplines. Factors influencing the acquisition of subjects by students: the main income of the family comes from non-farm (69,9 %), sex (52,2 %), studying at a higher education institution on a state grant (108,8 %), the student's course of study …
Innovative Rotor Casing And Leveling Apron For Combined Tillage Machine, A.A. Akhmetov, L.B. Muratov
Innovative Rotor Casing And Leveling Apron For Combined Tillage Machine, A.A. Akhmetov, L.B. Muratov
Irrigation and Melioration
Investigations of the design of a combined machine equipped with an innovative casing and a leveler apron are presented, and the parameters of the leveler apron are substantiated. It was experimentally established that when the height of the drawing prism is exceeded by more than 200 mm, due to the falling of the crumbling part of the soil onto the rotor, the soil is thrown forward in the direction of the machine. Therefore, to eliminate soil waste, it is necessary either to reduce the height of the drag prism, or to increase the distance between the rotor and the leveling …
Ensuring The Uniformity Of Movement Of The Working Bodies Of The Machine For Processing Ridges In The Depth Of Travel, А. Tukhtakuziev, K.G. Abdulkhaev
Ensuring The Uniformity Of Movement Of The Working Bodies Of The Machine For Processing Ridges In The Depth Of Travel, А. Tukhtakuziev, K.G. Abdulkhaev
Irrigation and Melioration
The article theoretically investigates the issue of identifying ways to ensure the deepening of the working bodies of the machine for processing ridges to a given processing depth and its required uniformity of stroke. The research results show that the deepening of the working bodies of the ridges processing machine to a given processing depth and its required uniformity is provided mainly due to the correct choice of the vertical distance from its reference plane to the lower connection points. The novelty of the conducted research lies in the fact that an analytical dependence has been obtained that allows us …
Develepment Of Land Market In Eastern European Countries And Experience For Uzbekistan, A.R. Nurnazarov
Develepment Of Land Market In Eastern European Countries And Experience For Uzbekistan, A.R. Nurnazarov
Irrigation and Melioration
The article examines the experience of the formation of the agricultural land market in Eastern European countries since the 90 s of the twentieth century, the problems and features of its devel-opment, the impact of the land market on the economies of countries. Particular attention is paid to the transformation of land ownership, methods of land privatization, land pricing, restrictions on land purchase, regulation of land relations in market conditions, issues of granting the right to pur-chase land to foreign individuals and legal entities, requirements for land owners for the presence of a special agricultural education or 3-5 years of …
The Developmet Of Competences Via Techniques For Enhancing Esp (English For Specific Purposes) Vocabulary Of Learners, G. Eshchanova
The Developmet Of Competences Via Techniques For Enhancing Esp (English For Specific Purposes) Vocabulary Of Learners, G. Eshchanova
Irrigation and Melioration
In the article a recent trend in higher education is ESP (English for Specific Purposes) courses is discussed. These courses are designed around students’ needs based on their field of study. The goal is to strengthen students’ proficiency and help them to get ready to cope with everyday situations and deal with professionals in many fields such as: engineering, medicine, education and IT. There are many training sessions organized by international experts whose goal is to train local teachers to teach these courses successfully. In order to develop an ability to learn new vocabulary, for both general English and technical …
Development Of Girls’ Sports, A.R. Khodjanov, V.V. Mahmudov
Development Of Girls’ Sports, A.R. Khodjanov, V.V. Mahmudov
Irrigation and Melioration
The article addresses current issues of higher education, taking into account its specifics. She has been providing appropriate advice on improving girls' physical well-being. The use of opportunities and qualities has an impact on the creation of comfortable conditions for female athletes. For girls involved in sports, the creation of impressive quality and possible conditions is considered. As a result, the girls-athletes of our institute took 2-3 places in the district and city qualifying rounds of chess, table tennis and won a ticket to the republican stage. At the republican stage, 2 female students of our team took 4th place …
The Imrovement Of Esp Teaching Via Methodical Provision At Technical Institution: Specializm-Oriented English Via Agriculture, G. Eshchanova, U. Nullaev
The Imrovement Of Esp Teaching Via Methodical Provision At Technical Institution: Specializm-Oriented English Via Agriculture, G. Eshchanova, U. Nullaev
Irrigation and Melioration
In the given article the ways that ESP combines subject matter and English language teaching is discussed. This approach can be highly motivating for students because students are able to apply what they learn in their English classes to their main field of study, whether it be law, computing, business, tourism, etc. Being able to use the vocabulary and structures that they learn in a meaningful context reinforces what is taught and increases their motivation. Nevertheless, ESP concentrates more on language in context than on teaching grammar and language structures. Additionally, the ways of teaching English in ESL classes and …
Epics Lakota: Promoting Food Sovereignty On Pine Ridge Indian Reservation, Samantha Bijonowski, Kathleen Johnson, Jonathan Damon
Epics Lakota: Promoting Food Sovereignty On Pine Ridge Indian Reservation, Samantha Bijonowski, Kathleen Johnson, Jonathan Damon
Purdue Journal of Service-Learning and International Engagement
EPICS Team Lakota was started as a way for students to help promote food sovereignty and combat loss of cultural knowledge as felt by the residents of Pine Ridge Reservation, which is located in one of the poorest counties in the United States and is a food desert. In partnership with EPICS students at Oglala Lakota College (OLC) and South Dakota School of Mines (SDSM), students at Purdue came up with the idea of putting up a greenhouse on the Rapid City Campus of OLC. This greenhouse was meant not as a direct solution to food scarcity, but as a …
Justification Of The Main Parameters And Operating Modes Of The Crushers-Shredders Of Coarse Feed, K.D. Astanakulov, F.U. Karshiev, Sh.Kh. Gapparov
Justification Of The Main Parameters And Operating Modes Of The Crushers-Shredders Of Coarse Feed, K.D. Astanakulov, F.U. Karshiev, Sh.Kh. Gapparov
Irrigation and Melioration
The article presents the results of research on the justification of the parameters of the working bodies and operating modes of the mini crushers-shredders of coarse feed. On the basis of experimental research to study the effect of the rotor parameters Mini Crusher its qualitative performance indicators. According to the teachings found that rational parametres and operating modes-Crusher are: rotor length 350 mm; rotor diameter 550 mm; rotor speed 1290 min-1; the number of hammers 20 pcs; angle of rotation of the hammers 60.
Plan Dimensions Of The Flow Confinited By Cross Dams, On Rivers With Non-Symmetric Flooring, M.R. Bakiev, U.A. Kahhorov, A.А. Jakhonov
Plan Dimensions Of The Flow Confinited By Cross Dams, On Rivers With Non-Symmetric Flooring, M.R. Bakiev, U.A. Kahhorov, A.А. Jakhonov
Irrigation and Melioration
Improving methods and technologies for calculating and designing floodplain transverse dams, taking into account the interaction of floodplain and riverbed flows to protect the banks from erosion and regulate riverbeds is one of the most important tasks. At the same time, the priority remains the transverse blind dams made of local soil with the attachment of their head. Their construction on rivers with two-sided asymmetric floodplains has its own characteristics, which consist in the need to take into account the morphology, the different roughness of the floodplain and the channel, the interaction of floodplain and channel flows, the asymmetry of …
Study Of Performance Of Vertical Drainage Well Construction From Polymer Materials, I.A. Akhmedov, Z.K. Mirkhasilova
Study Of Performance Of Vertical Drainage Well Construction From Polymer Materials, I.A. Akhmedov, Z.K. Mirkhasilova
Irrigation and Melioration
The article is devoted to the reconstruction and construction of vertical drainage wells. The use of vertical drainage wells is characterized by a decrease in the level of groundwater. The article presents data and typical regions of the use of vertical drainage wells.Also presented are mechanical, physical and chemical methods of well cleaning in practice. The information on the design and construction of vertical drainage wells is described. The analysis of corrosion resistance of vertical drainage well materials and their service life has been carried out. It is known that polymeric materials are resistant to corrosive environments. Using filters made …
Results Of Software Modeling Flow Section Of Vane Pumps, О.Я. Гловацкий, R.R. Ergashev, A.A. Abdullaev, J.I. Rashidov
Results Of Software Modeling Flow Section Of Vane Pumps, О.Я. Гловацкий, R.R. Ergashev, A.A. Abdullaev, J.I. Rashidov
Irrigation and Melioration
The article presents an analysis of data on the flow movement in a centrifugal pump, the results of which are aimed at improving the pump design in the direction of ensuring the flow of the flow without resistance to achieve energy savings in water transmission. To reduce slip on the pumps and to reduce the resistance to current flowing inside the pump to achieve energy savings, working impeller and spiral chamber shape are designed to be constructively correct. Data from pumping stations show that the performance of pumping equipment reduces water consumption by 10-12%, pressure by 18-20% and service life …
Economic Assessment Of A New Energy-Saving Electrical Technology For The Anesthesia Of Silkworms, O.A. Khaliknazarov, A.A. Turdiboev, D.M. Akbarov, D.M. Akbarov
Economic Assessment Of A New Energy-Saving Electrical Technology For The Anesthesia Of Silkworms, O.A. Khaliknazarov, A.A. Turdiboev, D.M. Akbarov, D.M. Akbarov
Irrigation and Melioration
The article provides information on the role of Uzbekistan in the world in the field of cocoons, the analysis of cocoon cultivation and primary processing technologies, technologies and technical devices currently used in primary cocoon processing. Suggestion of the use of ultra-high frequency (UV) electromagnetic field in the anesthesia of mulberry silkworm, technical specifications of the electrotechnical device for anesthesia of mulberry silkworm using ultra-high frequency (UV) electromagnetic field, and the implementation of this device SK-150K pilons The cost-effectiveness of the device was assessed, the cost-effective method achieved as a result of the research work is highlighted. According to the …