Engineering Commons^™

Assessing The Impact Of Nigerian Seaports’ Operational Performance On The Construction Sector’S Contribution To Gdp, Ismail Gbolahan Dere, Joel Ademola Ojekunle

CSID Journal of Infrastructure Development

The construction sector in Nigeria relies heavily on imported materials; however, inefficiencies and frequent delays at the seaports have led to increased costs, significantly affecting the sector’s contribution to the nation’s Gross Domestic Product (GDP). This study examines the relationship between the operational performance of Nigerian seaports and the GDP contribution of the construction sector. Secondary data on GDP and port performance indicators were obtained from the Central Bank of Nigeria (CBN) and the Nigerian Ports Authority (NPA), covering the period from 2011 to 2023. The analysis employed descriptive and inferential statistics methods, including regression and Stochastic Frontier Analysis (SFA). …

Acceptability Of The Proposed Congestion Charging System In The Central Business District Of Baguio City, Philippines, Ericka Renee A. Lanigt, Sandra S. Samantela, Ma. Catriona E. Devanadera, Casper Boongaling Agaton

CSID Journal of Infrastructure Development

The City Government of Baguio is proposing a congestion charging system in the Central Business District (CBD) to address the ongoing issue of traffic congestion in the city. Although it is an effective tool, low public acceptability hinders its implementation. This study aims to assess Baguio City residents' acceptability regarding the CBD's congestion charging system. Specifically, it seeks to (1) identify the factors that influence residents’ acceptability of the proposed system, (2) evaluate whether there is a significant difference in acceptability across different road users (private vehicles, public transportation, cycling, and walking), and (3) provide recommendations for transportation policy planning …

A Model Of Trips Route Planning To Improve The Accessibility Of Public Transportation In Bengkalis City Using Geographic Information System (Gis), Nur'ain Jaafar, Hendra Saputra, Mutia Lisya

CSID Journal of Infrastructure Development

The increase in population and motorized vehicles in Bengkalis City has led to greater demand for public transportation, which remains insufficient in meeting accessibility needs. This study aims to develop a model for planning public transportation routes using Geographic Information System (GIS) tools to improve accessibility in Bengkalis City. The study employs primary data from field surveys and secondary data from relevant agencies. GIS-based spatial analysis methods, such as service area analysis and the Origin-Destination (OD) matrix, are applied to evaluate accessibility and passenger movement patterns. The analysis results in two route alternatives assessed based on stop point density, community …

Efficient Methods And Algorithms For Analyzing Stochastic Systems, Mohammad Ahmadi

USF Tampa Graduate Theses and Dissertations

This dissertation addresses the challenges of stochastic analysis of safety-critical systems with biological components, where unexpected behavior can lead to catastrophic events. Two fundamental challenges hinder the analysis of such systems: their typically large or infinite state spaces, and the extreme rarity of error states of interest. While Monte Carlo simulation can analyze biochemical systems without storing the state space, accurately estimating rare event probabilities becomes computationally prohibitive. Conversely, probabilistic model checking excels at analyzing extremely low probability events but becomes impractical for systems with large or infinite state spaces due to memory constraints.This work proposes two main contributions to …

3d Nano-Architected Polymer Shell Enables Reconfigurable Stabilized Blue Phase Soft Crystals, Sephideh Norouzi, Yazael R. Morales-Flores, Tadej Emersic, Jeremy Money, Otillo E. Rodriguez-Lopez, Andrew Casale, Juan J. De Pablo, Jose A. Martinez-Gonzalez, Monirosadat Sadati

Faculty Publications

Blue phases (BPs), formed through the self-assembly of chiral liquid crystal molecules into 3D nanolattices with cubic symmetries, exhibit dynamic photonic bandgaps in the visible spectrum, offering transformative opportunities for advanced optical circuits, sensing and communication technologies. However, their thermal stability is restricted to a narrow temperature range (0.5–1.0 K), limiting practical applications. Polymer stabilization of bulk BPs has extended thermal stability but often compromises the dynamic behavior essential for fast-response functionalities. Here, experimental and computational approaches are integrated to investigate the effect of curvature and interfacial interactions on BP polymer stabilization. It is demonstrated that photo-polymerization of reactive monomers …

Grid Fragility, Blackouts, And Control Co-Design Solutions, Mario Garcia-Sanz

Faculty Scholarship

The grid is undergoing a large-scale transformation, including a significant reduction of synchronous generators, a high penetration of inverter-based resources and renewables, substantial demand growth, new extra-large loads, aging infrastructure and a concerning vulnerability to contingencies. Some of the recent massive blackouts in Spain/Portugal, Chile and Texas are exposing the fragility of the grid as we know it today. This paper introduces new solutions to stabilize the grid under undesired dynamic interactions and extreme contingencies, with the goal of avoiding cascading failures and blackouts. Using control co-design methodologies, the paper proposes three interdependent categories to improve the reliability and controllability …

Price-Based Dispatch In Engineered Truckload Trucking Networks, Don Taylor

International Material Handling Research Colloquium

No abstract provided.

A Practical Approach To Forward Space Allocation, Russell D. Meller, Chuck R. Grissom

International Material Handling Research Colloquium

No abstract provided.

Reinforcement Learning-Based Inventory Replenishment And Transshipment Planning In The Physical Internet Supply Chain, Simranjeet Singh Chadha, Uday Venkatadri

International Material Handling Research Colloquium

No abstract provided.

Multi-Door Cross-Dock Scheduling With Material Handling Resource Restrictions, William Ferrell, Nikhil Aditya Eti, Alison Gaddy, Vishal Badyal

International Material Handling Research Colloquium

No abstract provided.

Concepts For The Use Of Knowledge-Based Engineering In Intralogistics System Planning: Dynamic Layouting, Alexander Ortner-Pichler, Christian Landschützer

International Material Handling Research Colloquium

No abstract provided.

Graph-Based Foundation For Dels Specification, Leon Mcginnis

International Material Handling Research Colloquium

No abstract provided.

Grid-To-Belt High Throughput Sorter, Yossi Bukchin, Ilan Estrugo, Tal Raviv

International Material Handling Research Colloquium

No abstract provided.

Advancements In Human Action Recognition In Manual Material Handling Using Machine Learning, Jesus Jimenez, Joni Mccawley, Francis A. Mendez Mediavilla, Abhimanyu Sharotry

International Material Handling Research Colloquium

No abstract provided.

Picker Routing And Pallet Stacking With Item Precedence Constraints, Tiangrong Ding, Ioannis Fragkos, Rene De Koster

International Material Handling Research Colloquium

No abstract provided.

The Genesis Of Throughput Models For Automated Warehouse Systems - A Drama In Three Acts, Michael Walz, Timo Lehmann, Felix Rauscher, Christophe Senger, Kai Furmans, Michael Eder, Simon Schaffer, Philipp Trost, Maximilian Wagner, Georg Kartnig Prof.

International Material Handling Research Colloquium

No abstract provided.

Patterns Matter: Effects Of Customer Spatial Patterns On The Capacitated Vehicle Routing Problem, Melissa Tilashalski, Kimberly Ellis, Stanley Griffis, John Bell, Lance Saunders

International Material Handling Research Colloquium

No abstract provided.

Towards An Ontology Of Automated Warehousing Systems, Simon Schaffer, Michael Eder, Philipp Trost, Michael Maximilian Wagner, Timo Lehmann, Felix Rauscher, Christophe Senger, Michael Walz, Kai Furmans, Georg Kartnig

International Material Handling Research Colloquium

No abstract provided.

Performance Analysis Of Robot Routing Strategies In Human-Robot Collaborative Warehouses, Debjit Roy, Rashika Gupta

International Material Handling Research Colloquium

No abstract provided.

Being Efficient Or Responsive In The Order Picking Process, Jelmer Pier Van Der Gaast

International Material Handling Research Colloquium

No abstract provided.

Breakout Session: Workforce And Human-Centricity In Logistics, Imhrc Scientific Committee

International Material Handling Research Colloquium

Editors:

Fabio Sgarbossa, NTNU (Conference Chair)

David Porter, Oregon State University (Conference Co-Chair)

Manjunath Kamath, Oklahoma State University

Shanthi Muthuswamy, Northern Illinois University

Jennifer Pazour, Rensselaer Polytechnic Institute

Breakout Session- Ai/Robotics In Logistics, Imhrc Scientific Committee

International Material Handling Research Colloquium

Editors:

Fabio Sgarbossa, NTNU (Conference Chair)

David Porter, Oregon State University (Conference Co-Chair)

Manjunath Kamath, Oklahoma State University

Shanthi Muthuswamy, Northern Illinois University

Jennifer Pazour, Rensselaer Polytechnic Institute

Breakout Session: Circularity In Logistics, Imhrc Scientific Committee

International Material Handling Research Colloquium

Editors:

Fabio Sgarbossa, NTNU (Conference Chair)

David Porter, Oregon State University (Conference Co-Chair)

Manjunath Kamath, Oklahoma State University

Shanthi Muthuswamy, Northern Illinois University

Jennifer Pazour, Rensselaer Polytechnic Institute

Breakout Session: Research-Industry Collaboration In Logistics, Imhrc Scientific Committee

International Material Handling Research Colloquium

Editors:

Fabio Sgarbossa, NTNU (Conference Chair)

David Porter, Oregon State University (Conference Co-Chair)

Manjunath Kamath, Oklahoma State University

Shanthi Muthuswamy, Northern Illinois University

Jennifer Pazour, Rensselaer Polytechnic Institute

Keynote Speaker: Research-Driven Insights For The Academic Community, Michael Mikitka

International Material Handling Research Colloquium

No abstract provided.

Welcome And Introductions, Fabio Sgarbossa, David Porter

International Material Handling Research Colloquium

No abstract provided.

Technical Advances And Research Directions Of Borehole Geophysical Prospecting For Coal Mines, Cheng Jianyuan, Yan Yu, Li Yuteng, Wang Pan, Zhao Rui, Jiang Bici

Coal Geology & Exploration

Background High-precision and long-distance exploration of geological conditions is required for coal extraction and disaster prevention in coal mines. However, traditional drilling and geophysical prospecting methods face technical bottlenecks such as insufficient exploration accuracy and limited exploration ranges. Borehole geophysical prospecting technology integrates the reliable and straightforward axial results of drilling with the high-resolution transverse results of geophysical prospecting, providing technical support for safe, efficient, and intelligent coal mining. Based on the construction spaces, this study categorizes borehole geophysical prospecting technology into four types: i.e., intra-borehole, inter-borehole, borehole-surface, and borehole-roadway. Furthermore, it presents the primary advances and applicable conditions of …

Implications Of Helium Accumulation Models In Helium-Rich Basins In China For The Enrichment And Exploration Of Helium In Coal Measures, Li Yunbo, Wang Chengtao, Song Dangyu, Shi Xiaowei, Wang Rongqi

Coal Geology & Exploration

Background Helium is a strategic resource in serious short supply in China, and intensifying its exploration is crucial to national resource security. China enjoys abundant coal measure gas and significant potential for associated helium accumulation. However, relevant research remains in its infancy. Methods Based on a summary and analysis of helium generation, migration, and accumulation theories in natural gas reservoirs, this study systematically investigated the enrichment patterns of helium in coal measures and proposed exploration targets. Results and Conclusions The insights reveal that the helium resources in China exhibit a distribution pattern of zoning in both north-south and east-west directions. …

Advances In Research On Noble Gas As Tracers Of Geofluids And Helium Enrichment, Gao Yu, Liu Quanyou, Zhu Dongya, Wu Xiaoqi, Li Pengpeng

Coal Geology & Exploration

Background Noble gases emerge as significant tools for tracing the sources and evolutionary processes of geofluids due to their chemical inertness and different isotopic compositions across varying reservoirs. Helium serves as a noble gas tracer and a scarce resource, and its enrichment mechanisms and exploration potential have attracted wide attention.Methods Based on a summary of the geochemical data of typical gas reservoirs, volcanic gases, and surface hot springs at home and abroad, this study analyzed the interfering factors and end-member value screening in the source apportionment of noble gases. Furthermore, it summarized the applications of noble gas isotopes in …

Dominant Factors Causing Helium Deficiency In Coal-Measure Natural Gas In The Kuqa Depression, Tarim Basin, Liu Jiarun, Liu Quanyou, Li Pengpeng, Gao Yu, Lü Jiahao

Coal Geology & Exploration

Background Helium is identified as a scarce strategic resource, having found widespread applications in high-tech fields such as high-end manufacturing, aerospace, and national defense due to its stable chemical properties and low boiling point. The Kuqa Depression in the Tarim Basin is a significant natural gas production base in China. Determining the distribution characteristics and controlling factors of helium in coal-measure natural gas in the Kuqa Depression holds great significance.Methods Using two helium resource assessment methods and geological data, this study explored the dominant factors causing helium deficiency in the coal-measure natural gas in the Kuqa Depression.Results and …