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2018

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Articles 5221 - 5250 of 8951

Full-Text Articles in Engineering

Traffic Characterization Of An Internet Of Things(Iot) Network Architecture, Maitha Saif Salem Mohammed Alderei Apr 2018

Traffic Characterization Of An Internet Of Things(Iot) Network Architecture, Maitha Saif Salem Mohammed Alderei

Electrical Engineering Theses

Internet of things (IoT) is an evolving paradigm that is currently getting more attention and rapidly gaining importance. The basic idea of IoT is to connect everyone and everything to the Internet for information exchange. It is essential to develop a clear understanding of characteristics of IoT traffic sources as well as to find a traffic model that efficiently characterizes the statistical behavior of IoT traffic. Since many IoT devices generate relatively small sized data, we are particularly interested in an IoT network architecture where data from a number of different IoT devices are aggregated at an IoT gateway. We …

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Thermal And Structural Characterization Of Macro-Encapsulated Phase Change Material Integrated Into Concrete Cubes, Yasir Rashid Apr 2018

Thermal And Structural Characterization Of Macro-Encapsulated Phase Change Material Integrated Into Concrete Cubes, Yasir Rashid

Theses

High-energy consumption in buildings is a research issue of great importance today, with solid-liquid phase change materials (PCMs) proving an excellent candidate for passive means to reduce energy consumption. In the current research, a novel protective coating was developed from geopolymer to encapsulate a PCM to prevent leakage in the liquidous phase. The PCM was characterized using a customized temperature history method (THM) and standard differential scanning calorimetry (DSC). Two different porous materials, polyurethane foam and lightweight expanded clay aggregate (LECA), were selected to hold the PCM and act as a matrix in which to develop PCM capsules. Ingredients of …

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Criteria-Based Encryption, Tran Viet Xuan Phuong, Guomin Yang, Willy Susilo Apr 2018

Criteria-Based Encryption, Tran Viet Xuan Phuong, Guomin Yang, Willy Susilo

Research Collection School Of Computing and Information Systems

We present a new type of public-key encryption called Criteria-based Encryption (or , for short). Different from Attribute-based Encryption, in , we consider the access policies as criteria carrying different weights. A user must hold some cases (or answers) satisfying the criteria and have sufficient weights in order to successfully decrypt a message. We then propose two Schemes under different settings: the first scheme requires a user to have at least one case for a criterion specified by the encryptor in the access structure, while the second scheme requires a user to have all the cases for each criterion. We …

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Virtualization In Wireless Sensor Networks: Fault Tolerant Embedding For Internet Of Things, Omprakash Kaiwartya, Abdul Hanan Abdullah, Yue Cao, Jaime Lloret, Sushil Kumar, Rajiv Ratn Shah, Mukesh Prasad, Shiv Prakash Apr 2018

Virtualization In Wireless Sensor Networks: Fault Tolerant Embedding For Internet Of Things, Omprakash Kaiwartya, Abdul Hanan Abdullah, Yue Cao, Jaime Lloret, Sushil Kumar, Rajiv Ratn Shah, Mukesh Prasad, Shiv Prakash

Research Collection School Of Computing and Information Systems

Recently, virtualization in wireless sensor networks (WSNs) has witnessed significant attention due to the growing service domain for IoT. Related literature on virtualization in WSNs explored resource optimization without considering communication failure in WSNs environments. The failure of a communication link in WSNs impacts many virtual networks running IoT services. In this context, this paper proposes a framework for optimizing fault tolerance in virtualization in WSNs, focusing on heterogeneous networks for service-oriented IoT applications. An optimization problem is formulated considering fault tolerance and communication delay as two conflicting objectives. An adapted non-dominated sorting based genetic algorithm (A-NSGA) is developed to …

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Augmented Keyword Search On Spatial Entity Databases, Dongxiang Zhang, Yuchen Li, Xin Cao, Jie Shao, Heng Tao Shen Apr 2018

Augmented Keyword Search On Spatial Entity Databases, Dongxiang Zhang, Yuchen Li, Xin Cao, Jie Shao, Heng Tao Shen

Research Collection School Of Computing and Information Systems

In this paper, we propose a new type of query that augments the spatial keyword search with an additional boolean expression constraint. The query is issued against a corpus of structured or semi-structured spatial entities and is very useful in applications like mobile search and targeted location-aware advertising. We devise three types of indexing and filtering strategies. First, we utilize the hybrid IR2" role="presentation" style="display: inline; line-height: normal; letter-spacing: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border-width: 0px; border-style: initial; position: relative;">IR2IR2-tree and propose a novel hashing …

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Entagrec(++): An Enhanced Tag Recommendation System For Software Information Sites, Shawei Wang, David Lo, Bogdan Vasilescu, Alexander Serebrenik Apr 2018

Entagrec(++): An Enhanced Tag Recommendation System For Software Information Sites, Shawei Wang, David Lo, Bogdan Vasilescu, Alexander Serebrenik

Research Collection School Of Computing and Information Systems

Software engineers share experiences with modern technologies using software information sites, such as Stack Overflow. These sites allow developers to label posted content, referred to as software objects, with short descriptions, known as tags. Tags help to improve the organization of questions and simplify the browsing of questions for users. However, tags assigned to objects tend to be noisy and some objects are not well tagged. For instance, 14.7% of the questions that were posted in 2015 on Stack Overflow needed tag re-editing after the initial assignment. To improve the quality of tags in software information sites, we propose EnTagRec …

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Continuous Top-K Monitoring On Document Streams (Extended Abstract), Leong Hou U, Junjie Zhang, Kyriakos Mouratidis, Ye Li Apr 2018

Continuous Top-K Monitoring On Document Streams (Extended Abstract), Leong Hou U, Junjie Zhang, Kyriakos Mouratidis, Ye Li

Research Collection School Of Computing and Information Systems

The efficient processing of document streams plays an important role in many information filtering systems. Emerging applications, such as news update filtering and social network notifications, demand presenting end-users with the most relevant content to their preferences. In this work, user preferences are indicated by a set of keywords. A central server monitors the document stream and continuously reports to each user the top-k documents that are most relevant to her keywords. The objective is to support large numbers of users and high stream rates, while refreshing the topk results almost instantaneously. Our solution abandons the traditional frequency-ordered indexing approach, …

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Pilots’ Likelihood To Quit Flying In Part 121 Commercial Aviation, Gajapriya Tamilselvan Apr 2018

Pilots’ Likelihood To Quit Flying In Part 121 Commercial Aviation, Gajapriya Tamilselvan

Theses and Dissertations

The purpose of the study was to develop a statistical model representing predictors to anticipate pilots’ likelihood to quit flying in Part 121 Commercial Aviation. The study was primarily focused on the current Part 121 pilots in the United States. The study was designed with a correlational methodology and multiple linear regression was employed as the statistical procedure to analyze the data collected from diverse sources. The sample of the study consists of 163 participants (33 females), and all of them currently working for either major or regional airline in the United States respectively. Simultaneous regression strategy was used to …

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Effects Of Verbal Vs Graphical Weather Information On A Pilots Decision-Making During Preflight, Warren Phillip Pittorie Apr 2018

Effects Of Verbal Vs Graphical Weather Information On A Pilots Decision-Making During Preflight, Warren Phillip Pittorie

Theses and Dissertations

Before a general aviation pilot conducts a flight, they obtain a preflight weather briefing that shares information on possible hazards along the intended route of flight. These preflight weather briefings are typically obtained either verbally, via a narrative delivered over a telephone, or visually, where graphical and textual information is presented on a computer or tablet display. This study compared verbal and graphical/textual weather briefings in a within-subjects study that altered the order in which participants received each format. Thirty-six participants were given a survey that contained two flight scenarios, each with specific weather scenarios and a specific briefing format. …

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Numerical Analysis Of A Compact Helical Counterflow Heat Exchanger, Manikandan Chidambaram Apr 2018

Numerical Analysis Of A Compact Helical Counterflow Heat Exchanger, Manikandan Chidambaram

Theses and Dissertations

The performance of compact counter flow heat exchangers with helically shaped passages is examined using a 1-D analytical model and compared with a high-fidelity 3-D numerical simulation. The 1-D model is capable of assessing the general trends associated with the heat transfer performance and fluid pressure losses, whereas the high fidelity 3-D numerical model is needed to provide more accuracy. For water flow rates of 0.01 kg/s -1 kg/s, the models are used to predict the overall heat transfer coefficient ratio for a straight and counter helix heat exchanger. The maximum difference between the 3-D numerical and 1-D analytical model …

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Development Of A Static Aeroelastic Database Using Nastran Sol 144 For Aircraft Flight Loads Analysis From Conceptual Design Through Flight Test, Ryan M. Haughey Apr 2018

Development Of A Static Aeroelastic Database Using Nastran Sol 144 For Aircraft Flight Loads Analysis From Conceptual Design Through Flight Test, Ryan M. Haughey

Theses and Dissertations

This paper describes a method for predicting aircraft aerodynamic and inertial loading on a structural finite element model, (FEM) based on static aeroelastic coefficients. These coefficients are computed via interpolated spline methods within NASTRAN Solution 144 (static aeroelastic solution) and the “TRIM” module to connect the doublet-lattice model (DLM) and the structural finite element model for a coupled solution. The database is created by selecting key breakpoints where linear interpolation techniques can be utilized to develop and predict static aeroelastic coefficients for the prediction of any aircraft state for a given transient solution. This method is applicable from conceptual design …

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Multimodal Fusion Detection System For Autonomous Vehicles, Michael Person Apr 2018

Multimodal Fusion Detection System For Autonomous Vehicles, Michael Person

Theses and Dissertations

In order for autonomous vehicles to safely navigate the road ways, accurate object detection must take place before safe path planning can occur. Currently there is a gap between models that are fast enough and models that are accurate enough for deployment. We propose Multimodal Fusion Detection System (MDFS), a sensor fusion system that combines the speed of a fast image detection CNN model along with the accuracy of a LiDAR point cloud data through a decision tree approach. The primary objective is to bridge the trade-off between performance and accuracy. The motivation for MDFS is to reduce the computational …

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Controlled Intake Area Dredging For Fine Sediment Removal To Improve Water Quality In The Indian River Lagoon, Hannah Christine Grisanti Apr 2018

Controlled Intake Area Dredging For Fine Sediment Removal To Improve Water Quality In The Indian River Lagoon, Hannah Christine Grisanti

Theses and Dissertations

This study is an investigation of hydraulic dredging specifically designed to remove muck and other fine sediments from local water systems in Brevard County, Florida. The goal of the project is to improve water quality in the Indian River Lagoon (IRL) and create positive environmental impacts. Dredging is an excavation activity that takes place underwater in shallow seas or freshwater environments to remove material from the bottom surface. Typically, dredging techniques are implemented to keep waterways such as canals, inlets, and harbors navigable for boats and barges. Dredging is also commonly used to move sand from offshore sources to beaches …

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Towards Net Zero Energy Buildings: A Parametric Study On Building Energy Performance For Different Us Climate Zones, Owen Geraldo Betharte Apr 2018

Towards Net Zero Energy Buildings: A Parametric Study On Building Energy Performance For Different Us Climate Zones, Owen Geraldo Betharte

Theses and Dissertations

A Net Zero Energy Buildings (NZEB) can produce as much energy as it requires over an annual basis. This research investigated the building energy performance of different parameters over six US climate zones to ascertain which passive and active strategies would be most effective in each climate zone. Six cities were chosen to represent different climate zones. The focus of this study is for the Alumni House at the Florida Institute of Technology in Melbourne, FL to achieve NZE through retrofitting energy efficient measures (EEMs). An implementation of all active and passive strategies, also referred to Energy Efficiency Measures (EEM), …

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Performance Prediction Of Concrete Deep Beams Containing Cutouts Internally- Reinforced With Composite Bars, Somoud Jebril Arabasi Apr 2018

Performance Prediction Of Concrete Deep Beams Containing Cutouts Internally- Reinforced With Composite Bars, Somoud Jebril Arabasi

Theses

The development of code provisions for the use of strut-and-tie model (STM) in structural design has been hindered by great uncertainties due to the lack of experimental evidences. The problem becomes more complex when the conventional steel reinforcing bars around disturbed regions are replaced by non-metallic composite reinforcement. This research aimed to investigate the structural behavior of concrete deep beams with cutouts internally reinforced with glass fiber-reinforced polymer (GFRP) bars around regions of discontinuities. Different STMs were developed for the design of GFRP-reinforced concrete deep beams. The models were analyzed through the use of ACI 318 (2014) and CSA S806 …

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An Exploratory Study Of Sukuk Utilisation For Transportation Infrastructure Development In Indonesia, Fiona Lamari, Ayomi Dita Rarasati, Meilia Evita Apr 2018

An Exploratory Study Of Sukuk Utilisation For Transportation Infrastructure Development In Indonesia, Fiona Lamari, Ayomi Dita Rarasati, Meilia Evita

Makara Journal of Technology

Investment in infrastructure is one of the principal drivers of the growth of the economy. For that reason, the Indonesian government has proposed an investment budget in the railway and sea and air transport sectors over the next 10 years. In order to overcome the burden of direct outflows and for the future, a study was conducted to lay down the framework of Shariah-compliant payments for the development of infrastructure in Indonesia in the transport sector. This paper aims to explore the opportunity and implementation of sukuk utilisation to develop transportation infrastructure. Secondary data study and interviews were selected for …

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Efficient Image Coding And Transmission In Deep Space Communication, Reiner Dizon Apr 2018

Efficient Image Coding And Transmission In Deep Space Communication, Reiner Dizon

Honors College Theses

The usefulness of modern digital communication comes from ensuring the data from a source arrives to its destination quickly and correctly. To meet these demands, communication protocols employ data compression and error detection/correction to ensure compactness and accuracy of the data, especially for critical scientific data which requires the use of lossless compression. For example, in deep space communication, information received from satellites to ground stations on Earth come in huge volumes captured with high precision and resolution by space mission instruments, such as Hubble Space Telescope (HST). On-board implementation of communication protocols poses numerous constraints and demands on the …

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Small-Signal-Stability Enhancement Using A Power-System Stabilizer Based On The Cuckoo-Search Algorithm Against Contingency N-1 In The Sulselrabar 150-Kv System, Muhammad Ruswandi Djalal, Muhammad Yusuf Yunus, Herlambang Setiadi, Awan Uji Krismanto Apr 2018

Small-Signal-Stability Enhancement Using A Power-System Stabilizer Based On The Cuckoo-Search Algorithm Against Contingency N-1 In The Sulselrabar 150-Kv System, Muhammad Ruswandi Djalal, Muhammad Yusuf Yunus, Herlambang Setiadi, Awan Uji Krismanto

Makara Journal of Technology

Small-signal stability is one of the main factors limiting power transmission in conventional power systems. This concern is primarily handled by adding damper windings of a synchronous generator and power-system stabilizer (PSS). However, due to the impact of the N-1 contingency, damper windings and a conventional PSS are insufficient to overcome this problem. Proper placement and design of the PSS are crucial for improving stability. One approach to optimizing the placement and tuning of the PSS is to use an artificial-intelligence method. Here, the cuckoo-search algorithm (CSA) is proposed to optimize the PSS tuning and placement. Based on simulation, it …

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Isolation And Molecular Weight Characterization Of Tetragonula Laeviceps Honey Protein, Muhamad Sahlan, Nurul Azizah, Kazuaki Hakamada, Keiichi Noguchi, Masafumi Yohda Apr 2018

Isolation And Molecular Weight Characterization Of Tetragonula Laeviceps Honey Protein, Muhamad Sahlan, Nurul Azizah, Kazuaki Hakamada, Keiichi Noguchi, Masafumi Yohda

Makara Journal of Technology

The concentration of protein in honey is lower than polysaccharide. However, recently the honey’s protein is intensively studied and it showed that protein also have several biological activities such as antibacterial activity. The purpose of this research is to isolate and characterize Tetragonula laeviceps honey protein by determining the molecular weight. Honey protein of Trigona laeviceps was isolated using ultra-filtration with the membrane’s size of 30 kDa, then concentrated using tube membrane size 10 kDa. Molecular weight was analyzed by SDS PAGE. From the analysis, there was major protein band in honey produced by Tetragona laeviceps identified. The produced molecular …

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Prerequisites For Public Acceptance Of Waste-To-Energy Plants: Evidence From Germany And Indonesia, Uwe Lahl, Barbara Zeschmar-Lahl Apr 2018

Prerequisites For Public Acceptance Of Waste-To-Energy Plants: Evidence From Germany And Indonesia, Uwe Lahl, Barbara Zeschmar-Lahl

Makara Journal of Technology

Construction of waste incinerators often encounters resistance from the public. The minimum requirements for the ac- ceptance of these installations include modern air pollution control (APC) technology and safe disposal of residues. Confidence in the statements of government and government agencies as well as on those who support is an important point of acceptance. Independent scientific bodies such as universities can help to make this happen. In the case of the installation of waste into energy (WtE), such scientific support can be the measurement of emissions and their evalua- tion. Many products that enter the waste stream contain heavy metals, …

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Hybrid Brain-Computer Interface: A Novel Method On The Integration Of Eeg And Semg Signal For Active Prosthetic Control, Reza Darmakusuma, Ary Setijadi Prihatmanto, Adi Indrayanto, Tati Latifah Mengko Apr 2018

Hybrid Brain-Computer Interface: A Novel Method On The Integration Of Eeg And Semg Signal For Active Prosthetic Control, Reza Darmakusuma, Ary Setijadi Prihatmanto, Adi Indrayanto, Tati Latifah Mengko

Makara Journal of Technology

This paper describes a novel method for controlling active prosthetics by integrating surface electromyography (sEMG) and electroencephalograph signals to improve its intuitiveness. This paper also compares the new method (RTA-2) with other existing methods (AND and OR) for controlling active prosthetics. Based on analysis, RTA-2 features higher true positive rate (TPR) and balanced accuracy (BA) than AND method. On the other hand, the new method (RTA-2) yields lower false detection rate (FPR) than OR method. Analysis also shows that RTA-2 possesses equal TPR, FPR, and BA with the detection of movement intention using sEMG-based system. Although the RTA-2 method shows …

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Seismic Response Analysis Along The Coastal Area Of Bengkulu During The September 2007 Earthquake, Lindung Zalbuin Mase Apr 2018

Seismic Response Analysis Along The Coastal Area Of Bengkulu During The September 2007 Earthquake, Lindung Zalbuin Mase

Makara Journal of Technology

A strong earthquake of 8.4 Mw occurred at the Sumatra Subduction Zone in September 12, 2007. The area that underwent the impact of the earthquake was located along the coastal area of the Bengkulu Province. A seismic ground response study was then performed with reference to the event. Several site investigations, including standard penetration test and shear wave velocity tests, were conducted to understand the subsoil condition. The data were used to analyze a ground response during the earthquake. The amplification factor of each site was obtained, and a comparison of the spectral accelerations was performed. The results showed that …

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Coax-Fed Dipole-Type Applicator For Hepatic Cancer Rf Ablation, Basari Basari, Aditya Rakhmadi, Kazuyuki Saito Apr 2018

Coax-Fed Dipole-Type Applicator For Hepatic Cancer Rf Ablation, Basari Basari, Aditya Rakhmadi, Kazuyuki Saito

Makara Journal of Technology

Cancer is the third leading cause of mortality in the world and is one of the most difficult diseases to detect and cure. This fact motivates us to investigate a treatment method by using radiofrequency (RF) ablation. RF ablation therapy kills cancer cells by electromagnetically heating them up. The treatment uses an applicator that is inserted into the body to heat the cells. The cancer cells are exposed to a temperature of more than 60 °C in short duration (a few seconds to a few minutes), thereby causing cell destruction locally. To ensure effective treatment, a minimally invasive method is …

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Fusion Of Audio And Visual Information For Implementing Improved Speech Recognition System, Vikrant Satish Acharya Apr 2018

Fusion Of Audio And Visual Information For Implementing Improved Speech Recognition System, Vikrant Satish Acharya

Masters Theses

Speech recognition is a very useful technology because of its potential to develop applications, which are suitable for various needs of users. This research is an attempt to enhance the performance of a speech recognition system by combining the visual features (lip movement) with audio features. The results were calculated using utterances of numerals collected from participants inclusive of both male and female genders. Discrete Cosine Transform (DCT) coefficients were used for computing visual features and Mel Frequency Cepstral Coefficients (MFCC) were used for computing audio features. The classification was then carried out using Support Vector Machine (SVM). The results …

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The Evaluation Of The Integration Of Sustainability In Industrial Engineering Education At Louisiana State University, Kloe’ M. Liner Apr 2018

The Evaluation Of The Integration Of Sustainability In Industrial Engineering Education At Louisiana State University, Kloe’ M. Liner

Honors Capstones

No abstract provided.

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Simulating Fluid Flow And Gas Expansion In The Marine Riser Using Computational Fluid Dynamics (Cfd) Software, Ross Teichman Apr 2018

Simulating Fluid Flow And Gas Expansion In The Marine Riser Using Computational Fluid Dynamics (Cfd) Software, Ross Teichman

Honors Capstones

No abstract provided.

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Automated Filament Positioner For Microcombustion Pyrometry, Lauren F. Baxter Apr 2018

Automated Filament Positioner For Microcombustion Pyrometry, Lauren F. Baxter

Honors Capstones

No abstract provided.

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“Effectiveness Of Measuring Pedestrian And Bicycle Traffic Volumes Using Eco-Counter Passive Infrared Counting Technology”, Clarissa Bruns Apr 2018

“Effectiveness Of Measuring Pedestrian And Bicycle Traffic Volumes Using Eco-Counter Passive Infrared Counting Technology”, Clarissa Bruns

Honors Capstones

No abstract provided.

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On The Use Of Hertz’S Contact Stress For A Deformable Roller On A Half Space, Trent M. Andrus Apr 2018

On The Use Of Hertz’S Contact Stress For A Deformable Roller On A Half Space, Trent M. Andrus

Honors Capstones

No abstract provided.

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Vacuum-Operated Microfluidic Device For Colorimetric Determination Of Sperm Motility In Aquatic Species, Faiz Alam Apr 2018

Vacuum-Operated Microfluidic Device For Colorimetric Determination Of Sperm Motility In Aquatic Species, Faiz Alam

Honors Capstones

No abstract provided.

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