Papers by Arwa Abougharib
IEEE Access, 2023
During transportation, prediction of the Remaining Shelf-Life (RSL) of Fresh Fruits and Vegetable... more During transportation, prediction of the Remaining Shelf-Life (RSL) of Fresh Fruits and Vegetables (FFVs) is critical for planning and quality cost estimation. The Internet of Things (IoT) enables measured environmental variables to be processed in real-time. However, there is a need for a validated, real-time computational method that translates environmental measurements to dynamic RSL estimates. Most existing generic RSL models for FFVs are qualitative, invasive, or static. This study establishes a generic RSL model for FFVs under dynamic and unplanned logistic conditions. The model is based on estimating the current rate of general decay based on the expected respiration rate of the product, and integrating the decay rate with respect to time. Its implementation is non-destructive, non-invasive, and does not require accelerated shelf-life experiments before deployment. In addition, since the original model is rather computationally intensive, a surrogate model was proposed to allow the model to be implemented in fast, real-time applications for 'Edge IoT.' Experimental validation of the model using three fresh products (strawberries, apricots, and spinach) in a domestic refrigerator resulted in a maximum deviation of 1.3 days in prediction error using the original model and 2.95 days using the surrogate model. Nonetheless, the predictions made using either the original or surrogate models were statistically sound and not significantly different from the observed shelf lives of the samples, even at the 0.01 significance level. INDEX TERMS Remaining shelf life, fresh fruits and vegetables, IoT, food supply chain, quality monitoring, transportation.
Modified Hydraulic Models for Thin Smoke and Crowd Crawling Phenomena
Fire Technology, Apr 23, 2022
Design of A Theoretical Framework For A Real-Time Fire Evacuation Guidance System
Caged Quadrotor Drone for Inspection of Central HVAC Ducts
2019 Advances in Science and Engineering Technology International Conferences (ASET), Mar 1, 2019
In this project, a 3D-printed, cost-effective caged drone was designed, manufactured and programm... more In this project, a 3D-printed, cost-effective caged drone was designed, manufactured and programmed such that it can move through industrial-sized HVAC ducts by rolling and hovering motion, and can switch between remote-control and autonomous navigation to detect thermal leaks and blockages. The 3D-printed cylindrical cage enables the rolling motion of the drone through straight ducts simply by pitching the drone forward, thus it provides an energy-efficient alternative to continuous hovering, prolongs operation time and protects the drone and the operators. The drone is equipped with both IR and ultrasound proximity sensors for navigation and crack detection, an RGB camera to record a video feed of the drone's expedition through the duct, a temperature sensor and thermal camera to detect thermal leaks.
IEEE Access
During transportation, prediction of the Remaining Shelf-Life (RSL) of Fresh Fruits and Vegetable... more During transportation, prediction of the Remaining Shelf-Life (RSL) of Fresh Fruits and Vegetables (FFVs) is critical for planning and quality cost estimation. The Internet of Things (IoT) enables measured environmental variables to be processed in real-time. However, there is a need for a validated, real-time computational method that translates environmental measurements to dynamic RSL estimates. Most existing generic RSL models for FFVs are qualitative, invasive, or static. This study establishes a generic RSL model for FFVs under dynamic and unplanned logistic conditions. The model is based on estimating the current rate of general decay based on the expected respiration rate of the product, and integrating the decay rate with respect to time. Its implementation is non-destructive, non-invasive, and does not require accelerated shelf-life experiments before deployment. In addition, since the original model is rather computationally intensive, a surrogate model was proposed to allow the model to be implemented in fast, real-time applications for 'Edge IoT.' Experimental validation of the model using three fresh products (strawberries, apricots, and spinach) in a domestic refrigerator resulted in a maximum deviation of 1.3 days in prediction error using the original model and 2.95 days using the surrogate model. Nonetheless, the predictions made using either the original or surrogate models were statistically sound and not significantly different from the observed shelf lives of the samples, even at the 0.01 significance level. INDEX TERMS Remaining shelf life, fresh fruits and vegetables, IoT, food supply chain, quality monitoring, transportation.
Modified Hydraulic Models for Thin Smoke and Crowd Crawling Phenomena
Fire Technology
Design of A Theoretical Framework For A Real-Time Fire Evacuation Guidance System
Hybrid Autonomous RC Drone for Inspection of Industrial HVAC Ducts
A Real-Time Shelf-Life Estimation Model
A Shelf-Life Estimation Model built in MATLAB for fresh fruits and vegetables. The model can acce... more A Shelf-Life Estimation Model built in MATLAB for fresh fruits and vegetables. The model can accept any temperature history, whether simulated or provided by a temperature sensor, and can account for passively-created modified atmospheres. It has been validated experimentally and found to be most accurate for unsealed non-climacteric products. Much effort has been put into making the model setup process as user-friendly as possible as a user manual has been provided.
A Dynamic Black-box Refrigeration Temperature Simulator with Limited Training Data in Simulink
Remaining Shelf-Life Estimation of Fresh Fruits & Vegetables During Transportation
Enhancing the Self-Sensing Capability of Carbon-Fiber-Reinforced-Polymer
Addition of graphene nanoplatelets (GNP) and milled carbon fiber (MCF) to the polymer matrix of c... more Addition of graphene nanoplatelets (GNP) and milled carbon fiber (MCF) to the polymer matrix of carbon-fiber-reinforced composites was shown to modify the electrical resistance of such modified composites to tension loads, resulting in a more linear response with respect to strain compared to resin-only CFRPs. Indeed, experimental testing also confirms that sudden changes in the sample resistance correspond to instants of fiber breakage and hence, can be used to detect early stages of failure.
Caged Quadrotor Drone for Inspection of Central HVAC Ducts
2019 Advances in Science and Engineering Technology International Conferences (ASET), 2019
In this project, a 3D-printed, cost-effective caged drone was designed, manufactured and programm... more In this project, a 3D-printed, cost-effective caged drone was designed, manufactured and programmed such that it can move through industrial-sized HVAC ducts by rolling and hovering motion, and can switch between remote-control and autonomous navigation to detect thermal leaks and blockages. The 3D-printed cylindrical cage enables the rolling motion of the drone through straight ducts simply by pitching the drone forward, thus it provides an energy-efficient alternative to continuous hovering, prolongs operation time and protects the drone and the operators. The drone is equipped with both IR and ultrasound proximity sensors for navigation and crack detection, an RGB camera to record a video feed of the drone's expedition through the duct, a temperature sensor and thermal camera to detect thermal leaks.
IEEE Xplore, 2019
In this project, a 3D-printed, cost-effective caged drone was designed, manufactured and programm... more In this project, a 3D-printed, cost-effective caged drone was designed, manufactured and programmed such that it can move through industrial-sized HVAC ducts by rolling and hovering motion, and can switch between remote-control and autonomous navigation to detect thermal leaks and blockages. The 3D-printed cylindrical cage enables the rolling motion of the drone through straight ducts simply by pitching the drone forward, thus it provides an energy-efficient alternative to continuous hovering, prolongs operation time and protects the drone and the operators. The drone is equipped with both IR and ultrasound proximity sensors for navigation and crack detection, an RGB camera to record a video feed of the drone's expedition through the duct, a temperature sensor and thermal camera to detect thermal leaks.
A critical reflection on the economic literature concerning grade inflation, especially in the Iv... more A critical reflection on the economic literature concerning grade inflation, especially in the Ivy League, followed by a comprehensive review of the most common justifications for this phenomenon, and finally, possible non-drastic measures that can be suitably implemented to mitigate its effects...
The Introduction to Engineering (NGN 110 ) course walks freshman engineering students at AUS thro... more The Introduction to Engineering (NGN 110 ) course walks freshman engineering students at AUS through the various engineering fields and demonstrations of some applications of each field. This lab report briefly discusses the workings of the linear induction motor and the industrial control trainer, to which students were introduced in their Electrical Engineering Lab.
The Introduction to Engineering (NGN 110 ) course walks freshman engineering students at AUS thro... more The Introduction to Engineering (NGN 110 ) course walks freshman engineering students at AUS through the various engineering fields and demonstrations of some applications of each field. This lab report illustrates the two of the prominent methods of concrete testing: Destructive using hydraulic compression, and Non-Destructive using the Schmidt hammer, to which students were introduced in their Civil Engineering Lab.
The Introduction to Engineering (NGN 110 ) course walks freshman engineering students at AUS thro... more The Introduction to Engineering (NGN 110 ) course walks freshman engineering students at AUS through the various engineering fields and demonstrations of some applications of each field. This lab report illustrates the Reverse Osmosis desalination technique to which students were introduced in their Chemical Engineering Lab.
Drafts by Arwa Abougharib
This paper addresses the current debate about the implications of the Federal Reserve Transparenc... more This paper addresses the current debate about the implications of the Federal Reserve Transparency Act (FRTA) of 2015, which, if passed as a law, would permit the Government Accountability Office (GAO) to conduct comprehensive audits of the Federal Reserve (the Fed) without statutory restrictions. Achieving greater transparency and accountability of the Fed is generally a worthy cause since public resources are involved, and more so in the light of the organization’s inefficiencies that surfaced during the 2008 financial crisis. The paper, however, proposes that the Act be passed conditionally: the new information gained from audit under the FRTA should be available only to the Congress and not the general public. Reasons for recommending this restriction are the risks associated with publicly disseminating some confidential information, namely the risk of spurring bank runs and jeopardizing the candidness of the Fed’s policymakers’ discussions. Moreover, such a prudent implementation of the FRTA- as opposed to dismissing the Act entirely out of consideration- will help restore the Fed’s credibility in the eyes of the public, which in turn, is expected to increase the efficacy of monetary policy and the resilience of the American economy against future financial crises and shocks.
Keywords: Federal Reserve, path transparency, destination transparency
Conference Presentations by Arwa Abougharib
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Papers by Arwa Abougharib
Drafts by Arwa Abougharib
Keywords: Federal Reserve, path transparency, destination transparency
Conference Presentations by Arwa Abougharib
Keywords: Federal Reserve, path transparency, destination transparency