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Articles 31 - 60 of 1829
Full-Text Articles in Civil and Environmental Engineering
Innovative Technologies In The Assessment Of Accumulation And Erosion Processes In The Channels, A.M. Arifjanov, T.U. Apakhujayeva, D.E. Atakulov, S.N. Xoshimov
Innovative Technologies In The Assessment Of Accumulation And Erosion Processes In The Channels, A.M. Arifjanov, T.U. Apakhujayeva, D.E. Atakulov, S.N. Xoshimov
Irrigation and Melioration
The article discusses the possibilities of assessing the state of river beds and changes in them using remote sensing technologies (RS) and geographic information systems (GIS). With the help of geoinformation technologies, an assessment of deformation phenomena over the past 25 years in the channel of the Sokh river, which was chosen as the object of research, was given. Channel phenomena have been studied using data obtained from satellites. To analyze the situation, a model of the Landsat satellite was selected. The currently widely used official Glo Vis website was used to download the data. Data analyzed using ArcMap software. …
Traction Control Of The Friction Drive Of The Vertical Spindle, M. Shoumarova, T. Abdillaev, Sh.A. Yusupov, Ch.A. Shermatova
Traction Control Of The Friction Drive Of The Vertical Spindle, M. Shoumarova, T. Abdillaev, Sh.A. Yusupov, Ch.A. Shermatova
Irrigation and Melioration
The main indicator in assessing the quality of the work of cotton pickers is its completeness of picking cotton, among the factors that predetermine the completeness of picking a special place is occupied by the direction and magnitude of the absolute speed of the spindle tooth. Among the factors affecting the absolute speed of the tooth, the main place is occupied by the angular speed of rotation of the spindle around its own axis, which depends on the quality of functioning of the friction drive of the spindle. This drive does not always provide its required traction capacity, since due …
Research The Chopper Apparatus Of Equipment For Chopping Pressed Rough Fodders, Sh.H. Gapparov, N.A. Ashurov
Research The Chopper Apparatus Of Equipment For Chopping Pressed Rough Fodders, Sh.H. Gapparov, N.A. Ashurov
Irrigation and Melioration
Livestock is one of the most important agricultural sectors in Uzbekistan and it is based on family livestock farms. On family farms, livestock animals are fed with pressed roughage, including corn stalks, alfalfa hay, barbed straw and wheat straw, mixed with concentrated feed. However, due to the lack of small choppers suitable for small farms, the compressed feed is fed to animals without chopping, as a result of which about 25-30 percent of them go to waste and there are large losses. Taking this into account, a small device was developed for chopping pressed roughage and mixing it with concentrated …
Theoretical Research On Determining The Length Of The Shovels Of A Wheel Of Centrifugal Fans, V.A. Arkhipov, D. Dzhuraev, I.Zh. Toirov, A.E. Urishev
Theoretical Research On Determining The Length Of The Shovels Of A Wheel Of Centrifugal Fans, V.A. Arkhipov, D. Dzhuraev, I.Zh. Toirov, A.E. Urishev
Irrigation and Melioration
Presents the results of theoretical research by scientists, carried out scientific work to determine the length of the shovel of a centrifugal fan wheel. A technological scheme for installing a shovel on a fan wheel disk has been developed Analyzes of these works are carried out, which show that the length of the wheel shovel has a significant dependence on the parameters of the wheel (R, R1), the angle of installation α and the radius of the arc R3 of the shovel. An analytical dependence is derived for determining the length of the shovel of a …
Incorporating Pacific Ocean Climate Information To Enhance The Tree-Ring Based Streamflow Reconstruction Skill, Saria Bukhary, Ajay Kalra, Sajjad Ahmad
Incorporating Pacific Ocean Climate Information To Enhance The Tree-Ring Based Streamflow Reconstruction Skill, Saria Bukhary, Ajay Kalra, Sajjad Ahmad
Civil and Environmental Engineering and Construction Faculty Research
The Sacramento River Basin (SRB) and the San Joaquin River Basin (JRB) have a history of recurring droughts. Both are important for California, being the crucial source of water supply. The available instrumental records may not depict the long-term hydrologic variability encompassing the duration and frequency of the historic low flow events. Thus, streamflow reconstruction becomes important in the current scenario of climatic alteration, escalating population and growing water needs. Studies have shown that Pacific Decadal Oscillation (PDO), Southern Oscillation Index (SOI), and Pacific Ocean sea surface temperature (SST) influence the precipitation and streamflow volumes of southwestern United States, particularly …
City Tarmita (Old Termez) In The Kushans’ Period, Mamatmusaev Tohir
City Tarmita (Old Termez) In The Kushans’ Period, Mamatmusaev Tohir
The Scientific-Practice Journal of Architecture, Construction and Design
This article is devoted to results of expeditions that were explored by archaeological monuments of Chingiztepa and Karatepa in 2004-2005 yy. in the Old Termez.
Water Availability For Cannabis In Northern California: Intersections Of Climate, Policy, And Public Discourse, Betsy Morgan, Kaitlyn Spangler, Jacob Stuivenvolt-Allen, Christina N. Morrisett, Mark W. Brunson, Shih-Yu Simon Wang, Nancy Huntly
Water Availability For Cannabis In Northern California: Intersections Of Climate, Policy, And Public Discourse, Betsy Morgan, Kaitlyn Spangler, Jacob Stuivenvolt-Allen, Christina N. Morrisett, Mark W. Brunson, Shih-Yu Simon Wang, Nancy Huntly
Biology Faculty Publications
Availability of water for irrigated crops is driven by climate and policy, as moderated by public priorities and opinions. We explore how climate and water policy interact to influence water availability for cannabis (Cannabis sativa), a newly regulated crop in California, as well as how public discourse frames these interactions. Grower access to surface water covaries with precipitation frequency and oscillates consistently in an energetic 11–17 year wet-dry cycle. Assessing contemporary cannabis water policies against historic streamflow data showed that legal surface water access was most reliable for cannabis growers with small water rights ( < 600 m3) and …
Problems And Ways Of Solution In Transit Of Automobile Transport Of The Republic Of Uzbekistan, Aziz S. Khalmukhamedov
Problems And Ways Of Solution In Transit Of Automobile Transport Of The Republic Of Uzbekistan, Aziz S. Khalmukhamedov
Acta of Turin Polytechnic University in Tashkent
Maintaining the transit potential of a country is an integral part of the transport program of any country and vital for the economy. Unsatisfactory transit potential negatively affects the economy. Therefore, it is necessary to survey and establish indicators of the country’s transit potential. The determining factor of the country’s transit potential is the level and condition of the country’s highways. Thus, the indicator of the quality of the road - the flatness of the road - can become the main indicator that can be used for a generalized and quick assessment of the characteristics of the country’s transit potential. …
Effect Of Temperature On Early‐Age Properties Of Self‐Consolidating Concrete Equivalent Mortar, Nima Farzadnia, Jing Pan, Kamal Khayat, Eric Wirquin
Effect Of Temperature On Early‐Age Properties Of Self‐Consolidating Concrete Equivalent Mortar, Nima Farzadnia, Jing Pan, Kamal Khayat, Eric Wirquin
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
In this study, the effect of ambient temperature during casting on fresh properties, hydration kinetics, and early‐age compressive strength of self-consolidating concrete (SCC) was evaluated. Concrete equivalent mortars (CEMs) with water‐to‐binder ratios of 0.41 and 0.45 were cast based on SCC mixture designs for building and infrastructure construction and precast applications. The CEMs were prepared at temperatures ranging from 8 to 36°C. Superplasticizer (SP) and air‐entraining agent (AEA) demand were evaluated for the CEM mixtures made with different supplementary cementing material (SCM) and limestone filler types. Test results showed that the ambient temperature can significantly affect the SP and AEA …
The Compressive And Flexural Strength Of Concrete Containing Recycled Waste Plastic, Isaiah Akinkunmi
The Compressive And Flexural Strength Of Concrete Containing Recycled Waste Plastic, Isaiah Akinkunmi
Master of Science in Civil Engineering Theses
Annually, tons of plastic wastes end up in landfills and the oceans through indiscriminate dumping, constituting a major source of pollution to the environment and threat to human health and marine lives. It therefore necessitates an innovative strategy to help mitigate the environmental hazards caused by this pollution. A feasible eco-friendly strategy is by using granulated plastics, fibers or regrinds in concreting. This research explored the feasibility of this strategy by testing the compressive and flexural strengths of hardened concrete specimens containing varying percent of plastic aggregates used as partial replacement for fine aggregates. The compressive strength of specimens of …
An Assessment Of Research Trends On Fiscal Policy, Shabir Hussain Khahro, Shoail Farooq, Tauha Hussain Ali Dr, Nafees Ahmed Memon Dr, Qasim Hussain Khahro
An Assessment Of Research Trends On Fiscal Policy, Shabir Hussain Khahro, Shoail Farooq, Tauha Hussain Ali Dr, Nafees Ahmed Memon Dr, Qasim Hussain Khahro
Library Philosophy and Practice (e-journal)
Fiscal policy has been a topic of research interest for researchers. It plays a very important role in the economic growth of any country. Fiscal policy does not only achieve economic development, but eliminates the hindrances that assist economic stability. Based on the significance of the term. This paper evaluates the research output of the term fiscal policy since 1970 in different fields using the Scopus database. The data was collected from the Scopus database and were analyzed using Microsoft Excel to analyze the research trends on fiscal policy. It is concluded that fiscal policy has been a topic of …
Effective Early Treatment Of Microcystis Exponential Growth And Microcystin Production With Hydrogen Peroxide And Hydroxyapatite, Ian Struewing, Nathan Sienkiewicz, Chiqian Zhang, Nicholas Dugan, Jingrang Lu
Effective Early Treatment Of Microcystis Exponential Growth And Microcystin Production With Hydrogen Peroxide And Hydroxyapatite, Ian Struewing, Nathan Sienkiewicz, Chiqian Zhang, Nicholas Dugan, Jingrang Lu
Faculty Publications
: Mitigating cyanotoxin production is essential to protecting aquatic ecosystems and public health. However, current harmful cyanobacterial bloom (HCB) control strategies have significant shortcomings. Because predicting HCBs is difficult, current HCB control strategies are employed when heavy HCBs have already occurred. Our pilot study developed an effective HCB prediction approach that is employed before exponential cyanobacterial growth and massive cyanotoxin pro‐ duction can occur. We used a quantitative polymerase chain reaction (qPCR) assay targeting the toxin‐encoding gene mcyA to signal the timing of treatment. When control measures were applied at an early growth stage or one week before the exponential …
Feasibility Of Geothermal Energy Piles In New Orleans Alluvial Soils, Patrick A. Thurmond
Feasibility Of Geothermal Energy Piles In New Orleans Alluvial Soils, Patrick A. Thurmond
LSU New Orleans Theses and Dissertations
Geothermal energy piles offer the benefits of modifying existing construction practices to reduce costs associated with heating and cooling. A major obstacle today in effective utilization of these systems is a general lack of site-specific data on the thermal properties of subsoils. To maximize the potential efficiency of these systems, engineers require an understanding of the potential impact of this technology on existing foundation design methodology as well as a means for quantifying potential heat transfer through soil by determination of the soil’s thermal conductivity. This study examines the feasibility of energy piles with a focus on alluvial soils found …
Data Analysis Of Nebraska Pavements Containing Rap, Abdullah Azzam, Yong-Rak Kim, Mohammad Rahmani, Jiong Hu
Data Analysis Of Nebraska Pavements Containing Rap, Abdullah Azzam, Yong-Rak Kim, Mohammad Rahmani, Jiong Hu
Nebraska Department of Transportation: Research Reports
Nebraska has used reclaimed asphalt pavement (RAP) materials (in a range of 20-50%) over more than 10 years in pavement construction. Despite the immediate economic and environmental benefits it has been reported that incorporating RAP may reduce pavement durability and crack resistance. This study used NDOT’s database to investigate the effect of RAP amount on the overall behavior of pavement performance. Toward that end, we collected data of pavement performance, mixture design, traffic, and environment of a total 254 pavement projects constructed between 2009 and 2012. Using the data, several analyses (such as descriptive, inferential, and life cycle cost) were …
Visualization Of Real-Time Displacement Time History Superimposed With Dynamic Experiments Using Wireless Smart Sensors And Augmented Reality, Marlon Frank Agüero Injante
Visualization Of Real-Time Displacement Time History Superimposed With Dynamic Experiments Using Wireless Smart Sensors And Augmented Reality, Marlon Frank Agüero Injante
Civil Engineering ETDs
Wireless Smart Sensor (WSS) process field data and inform structural field engineers and owners about the infrastructure health, condition, and safety. Engineers acquire the data and investigate changes on displacements under loads to make informed choices and prioritize decisions concerning maintenance, required repairs, and infrastructure replacements. However, reliable data collection and access to displacement information in the field in real-time under loads remains a challenge. The displacement data provided by the WSS in the field undergoes additional processing, and it is seen at a different location, at the decision-making headquarters. If inspectors were able to observe structural displacements in real-time …
The Impact Of Grinding Time On Properties Of Cement Mortar Incorporated High Volume Waste Paper Sludge Ash, Ali A. Shubbar, Monower Sadique, Mohammed S. Nasr, Zainab S. Al-Khafaji, Khalid S. Hashim
The Impact Of Grinding Time On Properties Of Cement Mortar Incorporated High Volume Waste Paper Sludge Ash, Ali A. Shubbar, Monower Sadique, Mohammed S. Nasr, Zainab S. Al-Khafaji, Khalid S. Hashim
Karbala International Journal of Modern Science
Cement is considered a base material in preparing blending mixtures that applying in various projects in the civil engineering field. Nevertheless, the cement production process cause indubitable negative environmental influences such as emitting CO2. The production of cement produces around 7% of the global CO2 emissions. Thus, searching for alternate binders in building processes to minimise or substitute cement has been one of the social problems. A by-product or waste products are among the potential alternatives to the mentioned problem. The present investigation involves the consumption of paper sludge ash (PSA) waste as cement replacement to produce …
Bibliometric Survey On Effect Of Climate Factors On Spread Of Coronavirus (Covid-19), Seema Patil, Jay Makwana, Manish Attri
Bibliometric Survey On Effect Of Climate Factors On Spread Of Coronavirus (Covid-19), Seema Patil, Jay Makwana, Manish Attri
Library Philosophy and Practice (e-journal)
The new SARS-CoV-2 COVID-19 has spread quickly around the globe since it was first reported in Wuhan city of China, in December 2019 subsequent to being contracted from a zoonotic source. The main focus of this bibliometric survey is to recognize the few studies which have upheld the epidemiological hypothesis that the effect of climatic factors is playing a crucial role in the spreading of COVID-19. The analysis is done on the basis of 412 documents such as journals, articles, editorials, short surveys and some review papers. The United States contributes to the maximum number of publications followed by the …
Сharacteristics Mineral Resource Base Of Madagascar, A. E. Vorobyev, K. A. Vorobyov, S.A. Ndriambanuna, L.E. Schesnyak
Сharacteristics Mineral Resource Base Of Madagascar, A. E. Vorobyev, K. A. Vorobyov, S.A. Ndriambanuna, L.E. Schesnyak
Gorniy vestnik Uzbekistana
The main characteristics of the mineral resource base of Madagascar with details of coal, iron ore, non-ferrous metals, uranium, rare metals and gold are considered. In the gold-ore mineral base of Madagascar, coastal placers are of particular potential interest. Foreign mining companies and local crafts are described. The transition to the development of coastal gold placers is proposed
Bibliometric Survey On Effects Of Climate Change On Incidences Of Infectious Diseases, Seema Harshad Patil, Yatharth Jain, Vedant Marathe
Bibliometric Survey On Effects Of Climate Change On Incidences Of Infectious Diseases, Seema Harshad Patil, Yatharth Jain, Vedant Marathe
Library Philosophy and Practice (e-journal)
For understanding the influx of Infectious Diseases, research of climate change and its effects pertaining to the diseases is important. The motive of this bibliometric survey is to understand the research which has been carried out regarding the aforementioned topics. This paper summarizes the research in the 21st Century from 2001 to present. We conducted this analysis using tools such as Gephi, Researchgate, Scopus, ScienceScape, Google Scholar and Mapchart. This Bibliometric Survey on “Effects of Climate Change on Infectious Diseases” showed that maximum publications are articles. These publications are from conferences and journals related to Environmental Science. The United States …
Laboratory Testing And Mechanistic Analysis Of Treated Subgrade Soils, Hari Kumar Reddy Yarrapureddi
Laboratory Testing And Mechanistic Analysis Of Treated Subgrade Soils, Hari Kumar Reddy Yarrapureddi
Civil Engineering Theses
Calcium-based stabilizing agents such as cement and lime have been extensively used to improve the engineering properties of base and subgrade layers of pavement systems. Recently, polymers and chemical stabilizers have become popular due to cost efficiency, ease of application, and fast curing times. In this study, California Bearing Ratio (CBR) values of polymer and chemical treated soils were compared with the CBR values of soils treated with conventional stabilizers. Parametric sensitivity analyses was carried out on key parameters including the type of subgrade soil, stabilizing agent, stabilizing agent treatment levels, and moisture conditioning. Additionally, numerical analyses was performed to …
Expanding The Concept Of Comprehensive Area Ratio Parameter To The South-Central States Towards Simplifying The Structural Evaluation Of Flexible Pavements At The Network Level, Nitish R. Bastola
Civil Engineering Theses
The surface deflection bowl data collected through Non-Destructive Testing (NDT) has been widely utilized by various Department of Transportation (DOTs) in the South-Central States and other places. The primary purpose of using deflection-based NDTs in network-level assessment is to identify a weak pavement section that requires further analysis at the project level. The falling weight deflectometer (FWD) test is one of the common NDT based tests utilized by highway agencies in assessing the performance of the flexible pavement. However, a robust method to evaluate pavement sections utilizing FWD data from all the sensors are seldom developed. There is always a …
Policy Changes Impact In Deforestation Of The Brazilian Amazon, Iara Silva Jaques
Policy Changes Impact In Deforestation Of The Brazilian Amazon, Iara Silva Jaques
Master's Projects and Capstones
Since discovered and inhabited, the Brazilian Amazon has been explored and impacted negatively by human activities. The conversion of forest to pastureland and farmland, as well as mining activities, road opening, wood and ore extraction and fire are historically the main causes of environmental damages and forest loss in the region. This project overviewed the latest changes in environmental policy and practices towards environmental protection conducted by the Brazilian president Jair Bolsonaro, since he took office in 2019, and analyzed the progress of deforestation in the recent years under the new federal administration. Geographic Information System analysis were used to …
Relationships Between In-Situ Tests And Soil Cyclic Strength For Earthquake Hazard Characterization In The Pacific Northwest, Tanner Scott Bryantt
Relationships Between In-Situ Tests And Soil Cyclic Strength For Earthquake Hazard Characterization In The Pacific Northwest, Tanner Scott Bryantt
Dissertations and Theses
Strong earthquake shaking is a natural hazard threat in the Pacific Northwest. Soil failure due to strong earthquake shaking -- known as cyclic soil failure or liquefaction -- is expected to cause large ground deformations and damage to roads, bridges, and other civil infrastructure. Cyclic soil strength (CRR) is often characterized with in-situ geotechnical tests including the cone penetration test (CPT). Relationships between CRR and in-situ test data are not well established for soils in the Pacific Northwest. Portland State University, in partnership with New Albion Geotechnical has compiled a database of cyclic lab tests for Pacific Northwest soils to …
Housing Pre-Fabrication And Resource Optimization, Emma Dubensky
Housing Pre-Fabrication And Resource Optimization, Emma Dubensky
Honors Theses
Enclosure during construction is often time-consuming, expensive, and at the mercy of the weather. By introducing methods for manufacturing prefabricated enclosure components such as wall panels and roof sections, the impact of the three major variables is reduced. Designs for trusses, roof sections, wall sections, and foundations were developed and selected using civil engineering principles; and manufacturing and logistical processes were optimized using engineering and project management skill sets. These multi-disciplinary efforts were combined to create an accessible and versatile set of designs and instructions that can improve the effectiveness of both a skilled and non-skilled volunteer workforce. By creating …
State Of The Art In Composition, Fabrication, Characterization, And Modeling Methods Of Cement-Based Thermoelectric Materials For Low-Temperature Applications, Xiaoli Liu, Ruchita Jani, Esther Orisakwee, Conrad Johnston, Piotr Chudzinski, Ming Qu, Brian Norton, Niall Holmes Dr., Jorge Kohanoff, Lorenzo Stella, Hongxi Yin, Kazuaki Yazawa
State Of The Art In Composition, Fabrication, Characterization, And Modeling Methods Of Cement-Based Thermoelectric Materials For Low-Temperature Applications, Xiaoli Liu, Ruchita Jani, Esther Orisakwee, Conrad Johnston, Piotr Chudzinski, Ming Qu, Brian Norton, Niall Holmes Dr., Jorge Kohanoff, Lorenzo Stella, Hongxi Yin, Kazuaki Yazawa
Articles
The worldwide energy crisis and environmental deterioration are probably humanity’s greatest challenges. Thermoelectricity, which allows for the mutual conversion between thermal and electrical energy, has become a promising technology to alleviate this challenge. Increasingly more research focuses on how to fabricate and apply thermoelectric materials for harvesting energy and regulating the indoor thermal environment. However, only a few studies have focused on cementitious materials with thermoelectric potential. Thermoelectric cement is a composite material in which particular additives can enhance the thermoelectric performance of ordinary cement. By potentially replacing traditional construction materials with thermoelectric cement in building applications, electricity could be …
Challenges And Suggestions Of Diesel Oil Cleaning System In Unmanned Surface Vessels, Liwei Zhang
Challenges And Suggestions Of Diesel Oil Cleaning System In Unmanned Surface Vessels, Liwei Zhang
Maritime Safety & Environment Management Dissertations (Dalian)
No abstract provided.
Research On Risk Identification, Evaluation And Countermeasures Of Liquid Dangerous Cargo Ships In Yangpu Waters, Xiaofeng Han
Research On Risk Identification, Evaluation And Countermeasures Of Liquid Dangerous Cargo Ships In Yangpu Waters, Xiaofeng Han
Maritime Safety & Environment Management Dissertations (Dalian)
No abstract provided.
Housing Prefabrication And Resource Optimization, Megan Scherpereel
Housing Prefabrication And Resource Optimization, Megan Scherpereel
Honors Theses
Enclosure during construction is often time-consuming, expensive, and at the mercy of the weather. By introducing methods for manufacturing prefabricated enclosure components such as wall panels and roof sections, the impact of the three major variables is reduced. Designs for trusses, roof sections, wall sections, and foundations were developed and selected using civil engineering principles; and manufacturing and logistical processes were optimized using engineering and project management skill sets. These multi-disciplinary efforts were combined to create an accessible and versatile set of designs and instructions that can improve the effectiveness of both a skilled and non-skilled volunteer workforce. By creating …
Brazil, Big Hydro, And A Beautiful Monster: “Green” Energy Generation In The Xingu River Basin, Ian F. Hirons
Brazil, Big Hydro, And A Beautiful Monster: “Green” Energy Generation In The Xingu River Basin, Ian F. Hirons
Student Works
Brazil is quickly becoming an influential actor on the world stage of geopolitics. The nation has achieved global economic and environmental recognition due to the extensive development of its hydrological resources in the form of hydroelectric power plants. As the world’s second greatest generator of hydroelectricity, Brazil has proven a staunch adherence to building dams in the large-scale. Though these dams have brought electricity to millions of people across the country, the socio-ecological toll inflicted by their construction has been devastating to natural biomes and local inhabitants. This article traces Brazil’s proclivity for large-scale hydropower to four motivational categories often …
Loup Public Power District Fishing Pier & Parking Lot, Tyler Ruwe
Loup Public Power District Fishing Pier & Parking Lot, Tyler Ruwe
Honors Program: Senior Projects (Public)
This project was performed in fulfillment of the Civil Engineering Senior Design class (CIVE 489H). The goal of this project was to design an ADA compliant fishing pier and parking lot for the Loup Public Power District in Columbus, Nebraska. The fishing pier and parking lot will be located near the northeast corner of Lake North. A four-member team was formed to delegate the workload to accomplish this design project. I, Tyler Ruwe, served as the team’s project manager and structural engineering lead. Other disciplines of this design project included work involved in geotechnical, water resources, environmental, and transportation engineering. …