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Enhanced Tribological Properties Of Aligned Graphene-Epoxy Composites, Yuefeng DU, Zhenyu ZHANG, Dong WANG, Lezhen ZHANG, Junfeng CUI, Yapeng CHEN, Mingliang WU, Ruiyang KANG, Yunxiang LU, Jinhong YU, Nan JIANG 2022 Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian 116024, China

Enhanced Tribological Properties Of Aligned Graphene-Epoxy Composites, Yuefeng Du, Zhenyu Zhang, Dong Wang, Lezhen Zhang, Junfeng Cui, Yapeng Chen, Mingliang Wu, Ruiyang Kang, Yunxiang Lu, Jinhong Yu, Nan Jiang

Friction

The random distribution of graphene in epoxy matrix hinders the further applications of graphene-epoxy composites in the field of tribology. Hence, in order to fully utilize the anisotropic properties of graphene, highly aligned graphene-epoxy composites (AGEC) with horizontally oriented structure have been fabricated via an improved vacuum filtration freeze-drying method. The frictional tests results indicated that the wear rate of AGEC slowly increased from 5.19×10-6 mm3/(N·m) to 2.87×10-5 mm3/(N·m) with the increasing of the normal load from 2 to 10 N, whereas the friction coefficient (COF) remained a ...


Optimizing The Tribological Performance Of Dlc-Coated Nbr Rubber: The Role Of Hydrogen In Films, Changning BAI, Li QIANG, Bin ZHANG, Kaixiong GAO, Junyan ZHANG 2022 Key Laboratory of Science and Technology on Wear and Protection of Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Optimizing The Tribological Performance Of Dlc-Coated Nbr Rubber: The Role Of Hydrogen In Films, Changning Bai, Li Qiang, Bin Zhang, Kaixiong Gao, Junyan Zhang

Friction

Diamond-like carbon (DLC) films directly deposited on rubber substrate is undoubtedly one optimal option to improve the tribological properties due to its ultralow friction, high-hardness as well as good chemical compatibility with rubber. Investigating the relationship between film structure and tribological performance is vital for protecting rubber. In this study it was demonstrated that the etching effect induced by hydrogen incorporation played positive roles in reducing surface roughness of DLC films. In addition, the water contact angle (CA) of DLC-coated nitrile butadiene rubber (NBR) was sensitive to the surface energy and sp2 carbon clustering of DLC films. Most importantly ...


Experimental And Modelling Studies Of The Transient Tribological Behaviour Of A Two-Phase Lubricant Under Complex Loading Conditions, Xiao YANG, Lemeng ZHANG, Denis J. POLITIS, Jie ZHANG, Mohammad M. GHARBI, David LEYVRAZ, Liliang WANG 2022 Department of Mechanical Engineering, Imperial College London, London SW7 2AZ, UK

Experimental And Modelling Studies Of The Transient Tribological Behaviour Of A Two-Phase Lubricant Under Complex Loading Conditions, Xiao Yang, Lemeng Zhang, Denis J. Politis, Jie Zhang, Mohammad M. Gharbi, David Leyvraz, Liliang Wang

Friction

The transient tribological phenomenon and premature lubricant breakdown have been widely observed in metal forming, leading to excessive friction at the contact interfaces. In this research, the transient tribological behaviour of a two-phase lubricant were studied under complex loading conditions, featuring abrupt interfacial temperature, contact load, and sliding speed changes, thus representing the severe interfacial conditions observed in warm/hot metal forming applications. The strong experimental evidence indicates that the evolution of friction was attributed to the physical diminution and chemical decomposition effects. As such, a visco-mechanochemical interactive friction model was developed to accurately predict the transient tribological behaviour of ...


A Finite-Element-Aided Ultrasonic Method For Measuring Central Oil-Film Thickness In A Roller-Raceway Tribo-Pair, Pan DOU, Tonghai WU, Zhaopeng LUO, Peiping YANG, Zhongxiao PENG, Min YU, Tom REDDYHOFF 2022 Key Laboratory of Education Ministry for Modern Design and Rotor-Bearing System, Xi’an Jiaotong University, Xi’an 710049, China

A Finite-Element-Aided Ultrasonic Method For Measuring Central Oil-Film Thickness In A Roller-Raceway Tribo-Pair, Pan Dou, Tonghai Wu, Zhaopeng Luo, Peiping Yang, Zhongxiao Peng, Min Yu, Tom Reddyhoff

Friction

Roller bearings support heavy loads by riding on an ultra-thin oil film (between the roller and raceway), the thickness of which is critical as it reflects the lubrication performance. Ultrasonic interfacial reflection, which facilitates the non-destructive measurement of oil-film thickness, has been widely studied. However, insufficient spatial resolution around the rolling line contact zone remains a barrier despite the use of miniature piezoelectric transducers. In this study, a finite-element-aided method is utilized to simulate wave propagation through a three-layered structure of roller-oil-raceway under elastohydrodynamic lubrication (EHL) with nonlinear characteristics of the i) deformed curvature of the cylindrical roller and ii ...


Single-Pass Inline Pipeline 3d Reconstruction Using Depth Camera Array, Zhexiong Shang, Zhigang Shen 2022 University of Nebraska-Lincoln

Single-Pass Inline Pipeline 3d Reconstruction Using Depth Camera Array, Zhexiong Shang, Zhigang Shen

Faculty Publications in Construction Engineering & Management

A novel inline inspection (ILI) approach using depth cameras array (DCA) is introduced to create high-fidelity, dense 3D pipeline models. A new camera calibration method is introduced to register the color and the depth information of the cameras into a unified pipe model. By incorporating the calibration outcomes into a robust camera motion estimation approach, dense and complete 3D pipe surface reconstruction is achieved by using only the inline image data collected by a self-powered ILI rover in a single pass through a straight pipeline. The outcomes of the laboratory experiments demonstrate one-millimeter geometrical accuracy and 0.1-pixel photometric accuracy ...


Educational Data Mining For Predicting University Students' Performance, To Enhance University Admission Criteria, Youssef Amr Naga 2022 American University in Cairo

Educational Data Mining For Predicting University Students' Performance, To Enhance University Admission Criteria, Youssef Amr Naga

Theses and Dissertations

This thesis aims to propose and evaluate possible predictors of success for incoming university students to the American University in Cairo (AUC) who wish to enroll in its engineering programs, by considering their overall grade point average (GPA) at graduation as the measure of their success (output variable). This study is composed of two phases. First, available university admission variables; i.e., gender, high school diploma, high school score, and proficiency level in the English language (the language of instruction at AUC) at the time of application are evaluated as a predictor of students’ performance using five different data mining ...


Metasoftware: Building Blocks For Legal Technology, Houman Shadab 2022 New York Law School

Metasoftware: Building Blocks For Legal Technology, Houman Shadab

Seattle Journal of Technology, Environmental & Innovation Law

This Article develops a novel concept in information technology called “metasoftware.” It then applies the concept of metasoftware to developing legal technology.

Metasoftware enables users to create the software of their choosing and stands in sharp contrast to traditional, functional. Functional software is the default type of software that is currently produced and includes word processing, email, social networking, enterprise resource management, online marketplaces, and video game software. Metasoftware, by contrast, is not functional. Metasoftware presents the user with a blank slate upon which to build functional software.

I argue that software is metasoftware to that extent that (1) it ...


Utilization Of Steel Slag In Development Of Sustainable And Durable Concrete., Karthik Prabhu T Dr, Gowri Shankar M Mr., Jagadesh P Dr., Nagarajan V Dr. 2022 Coimbatore Institute of Technology, Coimbatore

Utilization Of Steel Slag In Development Of Sustainable And Durable Concrete., Karthik Prabhu T Dr, Gowri Shankar M Mr., Jagadesh P Dr., Nagarajan V Dr.

International Journal of Advanced Technology in Civil Engineering

This paper reflects the results of an experimental investigation of the strength, permeability, abrasion, carbonation, and shrinkage characteristics of concrete containing various percentages of steel slag as partial replacement of natural fine aggregates. M 30 Grade concrete was designed as per specific national specifications. Steel slag was used to replace natural sand in the range of 0– 50%. It was observed that the steel slag blended concrete with up to 50% substitution exhibited a comparable compressive and flexural strength when compared to the control specimens. From the Dorry’s abrasion test, it was noted that the specimens could be implemented ...


Methodology To Aircraft Design – Market Study & Design Optimization, Shreyash Attarkar, Dhananjay Ahire, Tanishq Pawar, Suresh Kumar M Prof. 2022 SOET, Sandip University, Nashik, Maharashtra, INDIA

Methodology To Aircraft Design – Market Study & Design Optimization, Shreyash Attarkar, Dhananjay Ahire, Tanishq Pawar, Suresh Kumar M Prof.

Graduate Research in Engineering and Technology (GRET)

In the last few years Aircraft have grown to be large-scale products with an increasing number of complicated systems, components, parts, and capabilities. Every single one of them. Various fields and technologies are included. Multiple sets of tools, procedures and methods are also included, as a result, to fully define, design, and develop an aircraft A comprehensive and methodic approach is required. Aircraft design that serves as a pillar in the evolution of the life cycle A balanced system solution that satisfies the needs of the customer. To accompany these characteristics. system engineering provides an interdisciplinary organization but is still ...


Effect Of Automation Level On Cognitive Workload When Collaborating With A Robotic Assistant, Mitchell A. Champagne 2022 Louisiana State University and Agricultural and Mechanical College

Effect Of Automation Level On Cognitive Workload When Collaborating With A Robotic Assistant, Mitchell A. Champagne

LSU Master's Theses

Manufacturing robotics have been used for decades to perform repetitive tasks, or tasks that require increased levels of speed, strength, or precision to meet production and specification requirements. Determining the appropriate degree of automation for both the human and robot collaborative team members is critical to optimize production as well as user experience. If the degree of automation is too high, the human will be out of the loop which can result in the loss of situational awareness and be detrimental to intervention time and accuracy. If the degree of automation is too low, then the human may experience greater ...


Sub-Nyquist Optical Pulse Sampling For Photonic Blind Source Separation, Taichu Shi, Yang Qi, Weipeng Zhang, Paul Prucnal, Ben Wu 2022 Rowan University

Sub-Nyquist Optical Pulse Sampling For Photonic Blind Source Separation, Taichu Shi, Yang Qi, Weipeng Zhang, Paul Prucnal, Ben Wu

Henry M. Rowan College of Engineering Faculty Scholarship

We propose and experimentally demonstrate an optical pulse sampling method for photonic blind source separation. The photonic system processes and separates wideband signals based on the statistical information of the mixed signals, and thus the sampling frequency can be orders of magnitude lower than the bandwidth of the signals. The ultra-fast optical pulses collect samples of the signals at very low sampling rates, and each sample is short enough to maintain the statistical properties of the signals. The low sampling frequency reduces the workloads of the analog to digital conversion and digital signal processing systems. In the meantime, the short ...


Blockchain Storage – Drive Configurations And Performance Analysis, Jesse Garner, Aditya A. Syal, Ronald C. Jones 2022 Harrisburg University of Science and Technology

Blockchain Storage – Drive Configurations And Performance Analysis, Jesse Garner, Aditya A. Syal, Ronald C. Jones

Other Student Works

This project will analyze the results of trials implementing various storage methods on Geth nodes to synchronize and maintain a full-archive state of the Ethereum blockchain. The purpose of these trials is to gain deeper insight to the process of lowering cost and increasing efficiency of blockchain storage using available technologies, analyzing results of various storage drives under similar conditions. It provides performance analysis and describes performance of each trial in relation to the others.


Impact Of The Ban On Illegal Mining Activities On Raw Water Quality: A Case-Study Of Konongo Water Treatment Plant, Ashanti Region Of Ghana, Sadique Anyame Bawa, Prince Antwi-Agyei, Martin Kyereh Domfeh 2022 University of Energy and Natural Resources, Regional Centre for Energy and Environmental Sustainability (RCEES), P. O. Box 214 Sunyani, Ghana

Impact Of The Ban On Illegal Mining Activities On Raw Water Quality: A Case-Study Of Konongo Water Treatment Plant, Ashanti Region Of Ghana, Sadique Anyame Bawa, Prince Antwi-Agyei, Martin Kyereh Domfeh

Journal of Sustainable Mining

The Government of Ghana prohibited Artisanal and Small-Scale Mining (ASM) operations from 2017 to 2018 as part of its strategy to address the socio-environmental issues caused by illegal mining activities, also referred to as “galamsey” operations. This study assessed the trend in the water quality of raw water abstracted at the Konongo Water Treatment Plant (WTP) for treatment before and after implementing the ban on “galamsey” operations. The main source of raw water for the Konongo WTP is the Anuru River. Secondary data on physicochemical water quality from 2006 to 2019 was sourced from the Konongo WTP and the Ashanti ...


Improved Methodology For Monitoring The Impact Of Mining Activities On Socio-Economic Conditions Of Local Communities, Binay Prakash Pandey, Devi Prasad Mishra 2022 Department of Mining Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826 004, India

Improved Methodology For Monitoring The Impact Of Mining Activities On Socio-Economic Conditions Of Local Communities, Binay Prakash Pandey, Devi Prasad Mishra

Journal of Sustainable Mining

Mining activities can cause tangible socio-economic improvements in the surrounding regions. Such potential has not been fully realized, owing to the fact that the socio-economic impact assessment processes exercised in India merely predict the footprint of industrial activity on the surrounding population. Consequently, project proponents are mandated to implement a management plan in cases of foreseeable negative consequences. However, both, the assessment study, as well as the process of implementation of a management plan, are riddled with significant gaps and limitations. Primary data collected for this research makes it apparent that, in comparison to the revenue generated from the mining ...


Black Beyond Measure: An Antideficit Exploration Of Cultural Capital Within A National Society Of Black Engineers (Nsbe) Chapter At A Predominantly White Institution (Pwi), Rhonda Harley 2022 University of San Diego

Black Beyond Measure: An Antideficit Exploration Of Cultural Capital Within A National Society Of Black Engineers (Nsbe) Chapter At A Predominantly White Institution (Pwi), Rhonda Harley

Dissertations

Historically, Black students have been excluded from Predominately White institutions (PWI) longer than welcomed to attend and matriculate (Harper et al., 2009). Due to this lack of inclusion, African American students' educational experiences often center on academic disparities, inequality of opportunity, and under-preparedness in career planning within the American education system. While there has been a fair amount of research on the lack of representation of Black students in the engineering disciplines, the heavy focus on quantitative data offers little insight into the unique ways students succeed and overcome institutional and systemic barriers in pursuit of their degree. Undergraduate experiences ...


Classification Of Internet Advertisement, Biswajit Biswal, Banasmita Subhadarshini, Sasmita Jena, Binita Kumari 2022 Department of Computer Application, Institute of Technical Education and Research, Siksha ‘O’ Anusandhan Deemed to be University, Odisha, India

Classification Of Internet Advertisement, Biswajit Biswal, Banasmita Subhadarshini, Sasmita Jena, Binita Kumari

Graduate Research in Engineering and Technology (GRET)

The investigation of web ad is vital now daily in human existence. Commercial and their connected regions are economy concern business has become an outstanding field in the wide spread region. Publicizing area are producing part of data and information which help to comprehend and should be examination, propositions information are should change over into significant information. To utilize these clients' data, settle on future choice and accomplish powerful choices, these choices help to comprehend client's need and utilization of the labour and products. Utilize client's information and carry out information mining strategies to get familiar with clients ...


Speech Emotion Recognition System Using Librosa For Better Customer Experience, Subhadarshini Mohanty, Subasish Mohapatra, Amlan Sahoo 2022 Odisha University of Technology and Research, Bhubaneswar, Odisha, India

Speech Emotion Recognition System Using Librosa For Better Customer Experience, Subhadarshini Mohanty, Subasish Mohapatra, Amlan Sahoo

Graduate Research in Engineering and Technology (GRET)

Call center employees usually depend on instinct to judge a potential customer and how to pitch to them. In this paper, we pitch a more effective way for call center employees to generate more leads and engagement to generate higher revenue by analyzing the speech of the target customer by using machine learning practices and depending on data to make data-driven decisions rather than intuition. Speech Emotion Recognition otherwise known as SER is the demonstration of aspiring to perceive human inclination along with the behavior. Normally voice reflects basic feeling through tone and pitch. According to human behavior, many creatures ...


Forecasting The Time Delay In Delivery Of Pharmaceutical Products, Subhalaxmi Hotta, Sonali Sahoo, Tripti Swarnkar 2022 Department of Computer Application Siksha ‘O’ Anusandhan Deemed to be University, Bhubaneswar, India-75103

Forecasting The Time Delay In Delivery Of Pharmaceutical Products, Subhalaxmi Hotta, Sonali Sahoo, Tripti Swarnkar

Graduate Research in Engineering and Technology (GRET)

Supply chain management system is a centralized system which controls and plans the activities involved from production to delivery of a product. Disruption in treatment and loss of life occurs due to delay in delivery of pharmaceutical products. The objective is to do a model using Machine learning algorithms to determine: Classification to predict which product will be delayed and Regression shows how much time it will be delayed exactly. This study will use publicly available supply chain data which helps to identify primary aspect of predicting whether HIV drugs are delivered in time or not. It will then use ...


Fortune Of Smart-Phones By A Model Recommendation, Sonali Sahoo, Subhalaxmi Hotta, Tripti Swarnkar 2022 Department of Computer Application Siksha ‘O’ Anusandhan Deemed to be University, Bhubaneswar, India-751030

Fortune Of Smart-Phones By A Model Recommendation, Sonali Sahoo, Subhalaxmi Hotta, Tripti Swarnkar

Graduate Research in Engineering and Technology (GRET)

In recent market, there are several cell phones available, Smart phones differ based on their Operating system. Here we are going to do a comparison between two Operating systems i.e., “IOS and ANDROID”. The comparison starts including the basic features of smart phones. The features are varying from each other. Some of them are categorical and some are numerical. According to these data, classify the smart phones using machine learning classification model. After the classification we are going to analyse which operating system-based Smartphone will be taken for further classification. A “Recommendation system”, will be designed which recommend a ...


Iot In Healthcare Domain, Manisha Banka, Ankita Mishra, Sushreeta Tripathy 2022 Institute of Technical Education and Research, Bhubaneswar, Odisha, India

Iot In Healthcare Domain, Manisha Banka, Ankita Mishra, Sushreeta Tripathy

Graduate Research in Engineering and Technology (GRET)

In the current scenario, the Internet of Things (IoT) is an emerging technology. IoT is a new pattern that has changed the long-established way of living into a modernistic life style. IoT is the network of physical objects, which enables to collect data and exchange it without human intervention. In general, IoT has been established to interlink the latest healthcare resources and to provide smart and efficient healthcare facilities to the people. IoT allows objects to be sensed and controlled remotely across existing network infrastructure. Health maintenance has become a considerable socio-economic concern when it comes to health expenses, need ...


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