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Articles 301 - 311 of 311
Full-Text Articles in Engineering
Experimental Optimization Of Simulated Ring Rolling Operation For Heavy Rail Industry, Jacob M. Summers
Experimental Optimization Of Simulated Ring Rolling Operation For Heavy Rail Industry, Jacob M. Summers
Masters Theses
“Industrially cast AISI 1070 steel wheel pre-forms from Amsted Rail Co. were experimentally hot rolled to simulate the conditions for industrial wheel rolling. Ring rolling of near net shape castings can improve location specific properties by decreasing segregation, closing porosity, and reducing grain size without the use of multiple forging operations in a traditional forging line. As-cast wheel sections were subjected to thermomechanical processing routes using a 2-high rolling mill in a temperature range of 830°C to 1200°C. The goal being to simulate the ring rolling process and optimize benefits of mechanical properties of the as-rolled steel. Charpy V- and …
Implementation Of Good Distribution Practice In A Pharmaceutical Manufacturer, Pana Chinajitphan
Implementation Of Good Distribution Practice In A Pharmaceutical Manufacturer, Pana Chinajitphan
Chulalongkorn University Theses and Dissertations (Chula ETD)
Good Distribution Practice (GDP) has recently been adopted and practised by Thailand's pharmaceutical industry, which has complemented the supply chain perspective and radically changed the quality landscape of the industry. This study presents a case of a pharmaceutical manufacturer in Thailand that implemented GDP to ensure the quality of its products during storage and distribution processes, as well as to prevent the entry of falsified products into the Pharmaceutical Supply Chain (PSC). The GDP implementation combined Project Management and Quality Risk Management (QRM) to identify operational gaps, manage identified risks, and reduce GDP gaps. After analysing internal stakeholders, related teams …
Diabetic Retinopathy Severity Classification Using Convolutional Neural Network Withtransfer Learning, Pranajit Kumar Das
Diabetic Retinopathy Severity Classification Using Convolutional Neural Network Withtransfer Learning, Pranajit Kumar Das
Chulalongkorn University Theses and Dissertations (Chula ETD)
Diabetic Retinopathy is a common retina disease caused by diabetes that is very difficult to diagnose initially because of its asymptomatic nature, which leads to permanent vision loss. Early and accurate detection of diabetic retinopathy is an effective way to prevent blindness. While screening programs are the most effective means of detecting diabetic retinopathy, it has various limitations like time consuming, laborious tasks, require a lot of expert ophthalmologists and technicians with standardized medical equipment. Automatic diabetic retinopathy classification using artificial intelligence and computer vision techniques mostly overcome the above-mentioned limitations despite it still being a challenging task. In this …
Preliminary Study And First Evidence Of Presence Of Microplastics In Green Mussel, Perna Viridis From Phuket, Phaothep Cherdsukjai, Vararin Vongpanich, Pensiri Akkajit
Preliminary Study And First Evidence Of Presence Of Microplastics In Green Mussel, Perna Viridis From Phuket, Phaothep Cherdsukjai, Vararin Vongpanich, Pensiri Akkajit
Applied Environmental Research
Plastics can reach the coastal environment and could impact the marine environment. Mussels are marine organisms which are prone to be exposed to microplastics pollution. Therefore, in this preliminary study, the commercially important green mussel (Perna viridis) collected at the Koh Phee Canal in Phuket, Phuket Province, southern peninsular Thailand, was investigated. The collected mussels from aquaculture farm fell into three age groups, namely 1 year-1 month, 1 year-7 months, and 1 year-9 months. Results from the investigation showed 200 items of microplastics present in Perna viridis with 76 items (38%) in flushed water and 124 items (62%) …
Rs-Gis Approach On Biomass Energy Potential Estimation Of Sugarcane Residues In Medellin, Cebu, Wenyville Nabor Galang, Ian Dominic Tabañag, Michael Loretero
Rs-Gis Approach On Biomass Energy Potential Estimation Of Sugarcane Residues In Medellin, Cebu, Wenyville Nabor Galang, Ian Dominic Tabañag, Michael Loretero
Applied Environmental Research
The need to use alternative energy sources is driven by the continued rise in fossil fuel price, increasing population and energy demand most particularly in a developing country like the Philippines. Biomass resources such as sugarcane residues provide alternative means to utilize its untapped potential for renewable energy. The use of remote sensing technology and geo-graphic information system enables detailed assessment on the quantification of its distribution, abundance and quality that will yield an effective and efficient use of its potential. Available energy potential measurement was conducted in the town of Medellin, part of Bogo-Medellin mill district, in the northern …
Soil Contamination And Risk Assessments On Selected Dumpsites Within The Basement Complex And Sedimentary Formations Of Ogun State, South-Western Nigeria, Akintayo O. Ojo, Oluwaseun T. Olurin, Oluseyi O. Adeleke
Soil Contamination And Risk Assessments On Selected Dumpsites Within The Basement Complex And Sedimentary Formations Of Ogun State, South-Western Nigeria, Akintayo O. Ojo, Oluwaseun T. Olurin, Oluseyi O. Adeleke
Applied Environmental Research
The concentrations of inorganic elements in soils of Saje, Ita-Oshin, Premier, and Oke-Diya dumpsites were determined using an X-Ray Fluorescence spectrometer to assess the soil quality through chronological changes with depths. A soil core sampler collects 56 samples at 20, 40, 60, and 80 cm depths. Saje showed high mean concentrations of Ca, K, Fe, Rb, and Ti at all depths, while Oke-Diya revealed high mean concentrations of Ca, K, Fe, Rb, Ti, Mn, Zn, V, Cr, and Ni at all depths. These concentrations were in a closed range suggesting a build-up of elements in the soil profiles. Oke-Diya had …
I2Mtc 2021 Special Issue In Ieee Transactions On Instrumentation And Measurement, Pawel Niewczas, Kristen M. Donnell, Melanie Ooi
I2Mtc 2021 Special Issue In Ieee Transactions On Instrumentation And Measurement, Pawel Niewczas, Kristen M. Donnell, Melanie Ooi
Electrical and Computer Engineering Faculty Research & Creative Works
No abstract provided.
Coastal Wave Powered Reverse Osmosis System, Alexander Raymond Charest, Joeseph Daniel Camobreco, Tori Sweet, Sam Williams, Andrew Lepage, Devan Sack, Meagan Wiggin, Chelsea Kimball, Brendan Reagan
Coastal Wave Powered Reverse Osmosis System, Alexander Raymond Charest, Joeseph Daniel Camobreco, Tori Sweet, Sam Williams, Andrew Lepage, Devan Sack, Meagan Wiggin, Chelsea Kimball, Brendan Reagan
Honors Theses and Capstones
Part of the Marine Energy Collegiate Competition (MECC) is the optional Build and Test Challenge where teams are encouraged to build a portion of their proposed solution. After the conducted testing the laboratory results are compared to the simulated and calculated models. For the MECC the University of New Hampshire (UNH) team decided to use a wave energy converter to produce pressurized water. The pressurized water would be filtered through a reverse osmosis membrane to make it potable. Our system uses the power of the ocean waves to move a float up and down in heave motion. This motion drives …
Overcoming The Limitations Of The Green Pyramid Rating System In The Egyptian Construction Industry: A Critical Analysis, Ahmed Osama Daoud, Ayman Ahmed Ezzat Othman, Obas John Ebohon, Ali Bayyati
Overcoming The Limitations Of The Green Pyramid Rating System In The Egyptian Construction Industry: A Critical Analysis, Ahmed Osama Daoud, Ayman Ahmed Ezzat Othman, Obas John Ebohon, Ali Bayyati
Architectural Engineering
Despite the tangible contributions of the construction industry to social development and economic growth, it is known for its natural resources overconsumption and solid waste (SW) generation both of which have major negative impacts on the natural environment. In the particular case of materials waste, the construction industry worldwide accounts for about 50% of global annual generated SW. In addition, construction materials may contribute up to 50% of the total project cost. Accordingly, the negative implications of the construction industry have compelled many nations to develop green building rating systems in order to preserve the environment, promote the economic efficiency …
Causes And Impacts Of Site Accidents In The Egyptian Construction Industry, Mostafa Adel, Omar Elnawawy, Ayman Ahmed Ezzat Othman, Mohamed Badawy
Causes And Impacts Of Site Accidents In The Egyptian Construction Industry, Mostafa Adel, Omar Elnawawy, Ayman Ahmed Ezzat Othman, Mohamed Badawy
Architectural Engineering
This paper aims to investigate the causes and impacts of site accidents in the Egyptian construction industry. To achieve this aim, a research methodology consisted of literature review and survey questionnaire was developed to accomplish three objectives. First, literature review was used to investigate the nature of the construction industry, identify and classify the causes of site accidents as well as their social and economic impacts on organizations and affected families. Second, a survey questionnaire was conducted with a representative sample of large and medium sized construction firms in Egypt to examine their perception of the causes of site accidents. …
Insights Into The Aerodynamic Versus Radiometric Surface Temperature Debate In Thermal-Based Evaporation Modeling, Kaniska Mallick, Dennis Baldocchi, Andrew Jarvis, Tian Hu, Ivonne Trebs, Mauro Sulis, Nishan Bhattarai, Christian Bossung, Yomna Eid, Jamie Cleverly, Jason Beringer, William Woodgate, Richard Silberstein, Nina Hinko-Najera, Wayne S. Meyer, Darren Ghent, Zoltan Szantoi, Gilles Boulet, William P. Kustas
Insights Into The Aerodynamic Versus Radiometric Surface Temperature Debate In Thermal-Based Evaporation Modeling, Kaniska Mallick, Dennis Baldocchi, Andrew Jarvis, Tian Hu, Ivonne Trebs, Mauro Sulis, Nishan Bhattarai, Christian Bossung, Yomna Eid, Jamie Cleverly, Jason Beringer, William Woodgate, Richard Silberstein, Nina Hinko-Najera, Wayne S. Meyer, Darren Ghent, Zoltan Szantoi, Gilles Boulet, William P. Kustas
Research outputs 2022 to 2026
Global evaporation monitoring from Earth observation thermal infrared satellite missions is historically challenged due to the unavailability of any direct measurements of aerodynamic temperature. State-of-the-art one-source evaporation models use remotely sensed radiometric surface temperature as a substitute for the aerodynamic temperature and apply empirical corrections to accommodate for their inequality. This introduces substantial uncertainty in operational drought mapping over complex landscapes. By employing a non-parametric model, we show that evaporation can be directly retrieved from thermal satellite data without the need of any empirical correction. Independent evaluation of evaporation in a broad spectrum of biome and aridity yielded statistically significant …