• On the Convergence of the Collatz Conjecture Sequence 

  Saab, Samer S. (2024-04-05)

  The Collatz conjecture, also known as the 3n + 1 problem, is a famous unsolved problem in mathematics. This work converts the conjecture dynamics into its corresponding difference equation. To determine the boundedness of ...
• Nano-based drilling fluids 

  Vryzas, Zisis; Kelessidis, Vassilios C. (2023-02-01)

  Nanomaterials are engineered materials with at least one dimension in the range of 1–100 nm. Nanofluids—nanoscale colloidal suspensions containing various nanomaterials—have distinctive properties and offer unprecedented ...
• Effect of temperature on the rheological properties of neat aqueous Wyoming sodium bentonite dispersions 

  Vryzas, Zisis; Kelessidis, Vassilios C.; Nalbantian, Lori; Zaspalis, Vassilis; Gerogiorgis, Dimitrios I.; Wubulikasimu, Yiming (2023-02-01)

  Temperature affects significantly the rheological behavior of neat water Wyoming Na-bentonite dispersions. The results of a very systematic study are presented regarding rheological measurements of 7% mass concentration ...
• Development and Testing of Novel Drilling Fluids Using Fe2O3 and SiO2 Nanoparticles for Enhanced Drilling Operations 

  Vryzas, Zisis; Mahmoud, Omar; Nasr-El-Din, Hisham A.; Kelessidis, Vassilios C. (International Petroleum Technology Conference, 2023-01-27)

  Access to deeper oil and gas reservoirs in hostile environments necessitates improvement of existing drilling fluids. This work focuses on the lab techniques for developing, assessing and analyzing innovative water-based ...
• Kinetics and adsorption of metolachlor and atrazineand the conversion products (deethylatrazine,deisopropylatrazine, hydroxyatrazine) in the soilprofile of a river basin 

  Vryzas, Z.; Papadopoulou-Mourkidou, E.; Soulios, G.; Prodromou, K. (2023-01-27)

  The adsorption kinetics and adsorption parameters of metolachlor, atrazine, deethylatrazine (DEA), deisopropylatrazine (DIA) and hydroxyatrazine (HA) were investigated in a soil profile in a maize field formed from recent ...
• Determination of alachlor, metolachlor, and their acidic metabolites in soils by microwave-assisted extraction (MAE) combined with solid phase extraction (SPE) coupled with GC-MS and HPLC-UV analysis 

  Vryzas, Zisis; Tsaboula, Ageliki; Papadopoulou-Mourkidou, Euphemia (2023-01-25)

  A well-validated analytical method based on microwave-assisted extraction (MAE) and SPE is presented for the combined analysis of alachlor, alachlor–oxanilic acid (OXA), alachlor–ethanesulfonic acid (ESA), metolachlor, ...
• Risk Assessment of Phthalates and Their Metabolites in Hospitalized Patients: A Focus on Di- and Mono-(2-ethylhexyl) Phthalates Exposure from Intravenous Plastic Bags 

  Saab, Yolande; Oueis, Emilia; Mehanna, Stephanie; Nakad, Zahi; Stephan, Rita; Khnayzer, Rony S. (2023-01-18)

  Phthalate esters (PAEs) are plasticizers associated with multiple toxicities; however, no strict regulations have been implemented to restrict their use in medical applications in Lebanon. Our study aimed at assessing the ...
• Joint computing, communication and cost-aware task offloading in D2D-enabled Het-MEC 

  Abbas, Nadine; Sharafeddine, Sanaa; Mourad, Azzam; Abou-Rjeily, Chadi; Fawaz, Wissam (2022-11-18)

  Due to the exploding traffic demands and the diversity of novel applications requiring extensive computation and radio resources, research has been active to devise mechanisms for responding to these challenges. Mobile ...
• SVM-based task admission control and computation offloading using lyapunov optimization in heterogeneous MEC network 

  Abbas, Nadine; Fawaz, Wissam; Sharafeddine, Sanaa; Mourad, Azzam; Abou-Rjeily, Chadi (2022-11-17)

  Integrating device-to-device (D2D) cooperation with mobile edge computing (MEC) for computation offloading has proven to be an effective method for extending the system capabilities of low-end devices to run complex ...
• Non-linear base and shaft reaction models for 1-D pile driving analysis 

  Loukidis, Dimitrios; Salgado, Rodrigo; Abou-Jaoude, Grace; Zhang, Yanbei (Korea Geotechnical Society, 2022-06-20)

  Simulation of pile driving is frequently used in present design practice to study pile drivability and to estimate pile static capacity based on driving data. The accuracy of both drivability analysis and static resistance ...
• Landslide hazard mapping for Lebanon 

  Abou-Jaoude, Grace; Wartman, Joseph (Korea Geotechnical Society, 2022-06-20)

  Landslides are a major hazard in Lebanon due to the country’s rugged topography and its setting in a region of high seismicity and high rainfall intensity. The situation is further exasperated by rapid expansion in urban ...
• An interdisciplinary Approach to Understanding the Open City 

  Abou-Jaoude, Grace; Appelhans, Nadine; Carlow, Vanessa Miriam; Mumm, Olaf; Murad, Majd; Schroder, Boris; Trapp, Jan Hendrik (2022-06-16)

  Cities worldwide are being confronted with perpetual economic challenges, flows of migration, and increasing vulnerability to the consequences of global changes. Within contemporary urban lines of conflict, the ‘open city’ ...
• Static and dynamic analyses of Dahr El Baidar slope 

  Matar, T.; Chehade, F. Hage; Harb, J.; Rahhal, M.; Abdel Massih, D. Youssef; Abdallah, C.; Ibrahim, E.; Khalaf-Keyrouz, L.; Nasr, G.; Abou-Jaoude, G.; Sursock, A. (National Technical University of Athens, 2022-06-16)

  The slope of Dahr El Baidar located on the central mountain of Lebanon hosts a section of the Arab Highway that is under construction to connect Beirut to neighboring Arab countries. This slope has experienced several ...
• The Kfarnabrakh Landslide of November 30th, 2015 

  Unknown author (2022-06-15)

  During the early hours of November 30th, 2015, the mountain town of Kfarnabrakh experienced a major landslide at one of the town’s rock cliffs. Kfarnabrakh is 1,150 meters above the sea level, 45 km south-east of Beirut, ...
• Soil stiffness nonlinearity in one-dimensional pile-driving simulations and formulas 

  Loukidis, Dimitrios; Abou-Jaoude, Grace; Salgado, Rodrigo; Zhang, Yanbei; Bisht, Vibhav (ASTM International, 2022-06-14)

  Driven piles are commonly used as foundation elements in engineering projects. Due to their simplicity, pile-driving formulas have been widely used in practice to estimate static pile capacity based on observations made ...
• Landslide susceptibility mapping based on triggering factors using a multi-modal approach 

  Kaafarani, Rouba; Abou-Jaoude, Grace; Wartman, Joseph; Tawk, Miriam (2022-06-10)

  Landslide susceptibility mapping has been done using statistical and physically-based assessment techniques with limited focus on mode-specific models to identify failure modes and runout patterns. Because each failure ...
• Quantitative coseismic and precipitation-induced landslide risk mapping for the country of Lebanon 

  Pollock, William; Wartman, Joseph; Abou-Jaoude, Grace; Grant, Alex (American Society of Civil Engineers, 2022-06-09)

  Quantitative landslide risk assessment is a key step in creating appropriate land use policies. The forced migration of those displaced by recent events in Syria has highlighted the need for studies to guide humanitarian ...
• The role of soil stiffness non-linearity in 1D pile driving simulations 

  Salgado, R.; Loukidis, D.; Abou-Jaoude, G.; Zhang, Y. (2022-06-09)

  Drivability studies and determination of pile static capacity from driving resistance are an integral part of present foundation engineering practice. The success of both pile driving simulations and back-calculation of ...
• Multimodal method for landslide risk analysis 

  Pollock, William; Grant, Alex; Wartman, Joseph; Abou-Jaoude, Grace (2022-06-09)

  Quantitative landslide risk analysis is a key step in creating appropriate land use policies. However, regional scale landslide hazard and risk studies are traditionally based on a single, infinite-slope style of failure, ...
• An Overview of scenario approaches 

  Abou-Jaoude, Grace; Mumm, Olaf; Carlow, Vanessa Miriam (2022-06-09)

  Rising complexities and uncertainties have emphasized the need to employ scenario thinking in urban design and planning. While different scenario methods have been widely used across disciplines, a comprehensive review of ...

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