Engineering Commons^™

An Investigation Into Cognitive Radio System Performance, Courtney Hardy, Lucas F. Feather, William S. Guy

Honors Theses

The objective of this thesis is to explore cognitive radio performance through an in-depth literature review and an implementation of a software-defined radio prototyping system. Specifically, this thesis investigates the spectrum-sensing aspect of cognitive radio by comparing two spectrum-sensing methods. It was found in the literature review that a system utilizing matched filter detection would provide higher probability of detection in low signal-to-noise ratio environments when compared to a system utilizing energy detection. These spectrum sensing methods were thus implemented and compared in the cognitive radio systems presented in this thesis. Additionally, experiments were conducted to determine the most efficient ...

Escalado De La Producción De Galactooligosacáridos A Reactor Discontinuo De 3 Y 20 Litros Usando B-Galactosidasa Kluyveromyces Lactis Libre, Karolain Cortes Santamaría, María Fernanda Gómez Pineda

Ingeniería de Alimentos

Los galactooligosacáridos (GOS) son compuestos empleados en alimentos funcionales por su actividad prebiótica. Se obtienen por la hidrólisis de la lactosa, empleando enzimas como β- Galactosidasa. El objetivo de este proyecto fue evaluar el efecto de escalado en la producción de GOS usando β- Galactosidasa de Kluyveromyces lactis, para ello, se empleó el lactosuero descremado y desmineralizado de la industria quesera, con el fin de obtener la lactosa que es el componente de interés para ser empleado en la producción de GOS. La lactosa fue concentrada a 33% por medio de evaporador, sin embargo, los resultados de rendimiento no fueron ...

Moisture Monitoring Of A Clt Structure In A Southern Climate, Elizabeth Poblete

Theses and Dissertations

Understanding of moisture behavior in cross laminated timber (CLT) is critical to the widespread use of CLT in construction in the United States. Currently, very little data exists on the long-term impact of moisture on CLT. The objective of this research is to collect data regarding the long-term moisture variation in the CLT panel at the University of Arkansas Adohi Hall residence hall. The climate of Northwest Arkansas is different from previously monitored buildings, as they were in the Pacific Northwest. Comparatively, Northwest Arkansas has a warmer climate with higher average annual precipitation. Waterproofing efforts are usually employed to prevent ...

Phonetic Algorithm Performance, Aaron Schneidereit

Senior Honors Projects

AARON SCHNEIDEREIT (Computer Science BS) Phonetic Algorithm Performance Sponsors: Noah Daniels (Computer Science and Statistics) Phonetic Algorithms are used for classifying words based on their pronunciation. These algorithms are used in many text-to-speech technologies and spell-checkers to ensure that a word can be correctly recognized despite minor spelling/pronunciation errors. The process of encoding a word to its phonetic surname is known as Phonetic Matching. Since 1918, there have only been a handful of phonetic algorithms that have been created. The main three algorithms that other phonetic algorithms are built from are Soundex, New York State Identification and Intelligence System ...

Hbd: Towards Efficient Reactive Rule Dispatching In Software-Defined Networks, Chang Chen, Xiaohe Hu, Kai Zheng, Xiang Wang, Yang Xiang, Jun Li

Tsinghua Science and Technology

Most types of Software-Defined Networking (SDN) architectures employ reactive rule dispatching to enhance real-time network control. The rule dispatcher, as one of the key components of the network controller, generates and dispatches the cache rules with response for the packet-in messages from the forwarding devices. It is important not only for ensuring semantic integrity between the control plane and the data plane, but also for preserving the performance and efficiency of the forwarding devices. In theory, generating the optimal cache rules on demands is a knotty problem due to its high theoretical complexity. In practice, however, the characteristics lying in ...

Improvement Of Mechanical Properties, Microscopic Structures, And Antibacterial Activity By Ag/Zno Nanocomposite Powder For Glaze-Decorated Ceramic, Qian Zhang, Lv Si Xu, Xiaoyan Guo

Journal of Advanced Ceramics

With the increase in the international trade of ceramics, improvement in the physical and chemical properties of ceramics has become a market demand in recent years. The addition of nanomaterials in glaze can simultaneously improve the mechanical and corrosion resistance properties of ceramics. In this study, the effect of nano-sized Ag/ZnO in glazed ceramic was investigated considering the hardness, whiteness, and microscopic structures of the products. Results showed that the Ag/ZnO nanocomposite powder significantly affects the performance of glaze. Glaze hardness reached the highest value (96.6 HV) at the low sintering temperature of 1130 ℃ with the addition ...

Gpu Based Techniques For Deep Image Merging, Jesse Archer, Geoff Leach, Ron Van Schyndel

Computational Visual Media

Deep images store multiple fragments per-pixel, each of which includes colour and depth, unlike traditional 2D flat images which store only a single colour value and possibly a depth value. Recently, deep images have found use in an increasing number of applications, including ones using transparency and compositing. A step in compositing deep images requires merging per-pixel fragment lists in depth order; little work has so far been presented on fast approaches.This paper explores GPU based merging of deep images using different memory layouts for fragment lists: linked lists, linearised arrays, and interleaved arrays. We also report performance improvements ...

Architectural Body: Performance As Design Methodology Facilitating Transformative Learning, Takako Hasegawa

Architecture and Planning Journal (APJ)

This paper will discuss multidisciplinary and experimental pedagogical case studies that place the importance of the body firmly back into architectural education. The advanced digital technologies currently employed almost universally in architectural education generate increasingly virtual and augmented design, resulting from processes that tend to be devoid of imagination of the body. The case studies discussed in this paper involved students’ direct participation in performative acts during the design process, facilitating positive transformative learning through direct experience. These include design briefs for Chelsea College of Arts (London, UK, 2009–2013), modules for the Architectural Association School of Architecture (AA) (London ...

Hydrostatic Performance Of Reinforced Concrete Pipe For Infiltration, Lui Sammy Wong

Electronic Thesis and Dissertation Repository

Groundwater infiltration into underground sewer systems has long been a costly issue for municipalities. With reinforced concrete pipe (RCP) being a primary option for sewer systems, existing hydrostatic testing methods conducted by manufacturers to measure internal pipe pressure, as required by specifications, do not reflect in-situ external hydrostatic conditions. This thesis records the development of a novel testing method to evaluate the RCP joint performance for infiltration. The test is safe and easy to conduct by RCP producers at the factory. The test method mimics field conditions of possible RCP joint gap and joint offset. Over 100 tests were conducted ...

Human Capital And Large Scale Pv Deployment, Biswajit Ghosh

International Journal of Power System Operation and Energy Management

Energy is one of the central parameters required for human survival after food. “Knowledge is power” and renewable energy plays increasingly important role to run knowledge-based society for sustainable social and economic development. Out of these, solar photovoltaic (PV) energy system is a useful tool to run the knowledge based systems. Apart from research and development, PV systems need suitable human capital for its successful penetration into every nook and corner of the society. The main aim of the present paper is to address the quality and quantity of human capital need in future to bring the solar PV power ...

Aligning Performance Management Systems For Lasting Outcomes In Humanitarian Operations, Kalyn M. Howard

Theses and Dissertations

Logistics is dynamic, expansive, and critical to organizational success. While it is generally believed that effective logistics management is associated with positive performance outcomes, the links between organizational practice and performance are understudied. This dissertation leverages resource-based theory and organizational learning theory to examine organizational practice and performance in non-traditional logistics settings, with particular focus on military organizations and humanitarian operational settings. First, a meta-analytical study establishes generalizable associations between various operations management practices and performance outcomes. Then, this is applied to dynamic humanitarian logistics settings, exploring how practitioners perceive practice and performance, and how this is reported and documented ...

Static Characteristics Of Thermal Humidity Converters Of Liquid Materials In Continuous Flow, N.I. Avezova, P.R. Ismatullaev, Paraxat Matyakubova

Chemical Technology, Control and Management

Thermal systems with distributed heat sources based on a pipeline segment with radial holes are proposed for the development of designs of thermal humidity converters for liquid materials. Across the liquid flow there are tubular arguments with cylindrical heat-sensitive elements, on the surface of which the heating element winding was wound, which significantly increased their sensitivity, speed, reliability and allowed the use of standard semiconductor heat-sensitive elements.

Biodiesel As An Alternate Fuel In A Diesel Engine With The Cooled Exhaust Gas Recirculation–A Measure To Reduce Harmful Emissions, S. Adinarayana

International Journal of Applied Research in Mechanical Engineering

Biodiesels reduce the emissions like HC, CO and particulate matter to minimum possible extent. But the NOx emissions increase because of the reason that the biodiesel is an oxygenated fuel. To contain this particular emission which is responsible for the human health degradation, acid rain, smog creation etc., the Exhaust Gas Recirculation (EGR) technique is resorted to. In this paper, a laboratory based DI diesel engine is run with neat biodiesel (Jatropha Methyl Ester) and cooled EGR which replaces a part of incoming air during suction. Various percentages (viz.0%, 7%, and 14%) of EGR were practiced to investigate the ...

Simulation And Analysis Of Impact Of Buffering Of Voice Calls In Integrated Voice And Data Communication System, V M. Chavan, M M. Kuber, R J. Mukhedkar

International Journal of Smart Sensor and Adhoc Network

Queuing theory and Markov chain analysis plays vital role in analyzing real-life problems. It is applied to wired network, wireless network and mobile communication to analyze the packet traffic in packet switched network. In this simulation and analysis, integrated communication system such as voice and data is simulated with different queue size for voice calls with different arrival and service rate and its results are analyzed to study the impact of buffering of voice and data calls for the proposed integrated wired network using Queuing theory and Markov chain analysis. We also propose to optimize the system characteristics in an ...

Efficient And Secure Authentication By Using 3-Path Transmission In Ad Hoc Networks, Vetri Selvi . S, Purus Hothaman

International Journal of Smart Sensor and Adhoc Network

Ad hoc networks are created dynamically and maintained by the individual nodes comprising the network. They do not require a pre-existing architecture for communication purposes and do not rely on any form of wired infrastructure; in an ad hoc network all communication occurs through a wireless median. The design and management of ad-hoc networks is significantly a challenging one when compared to contemporary networks. Authenticating the multicast session is an important one. To authenticate several factors should be considered, major issue are resource constraints and the wireless links. In addition to being resource efficient and robust, security solution must be ...

A Novel Review On Routing Protocols In Manets, Robinpreet Kaur, Mritunjay Kumar Rai

Undergraduate Academic Research Journal

Mobile means moving and ad hoc means temporary without any fixed infrastructure so mobile ad hoc networks are a kind of temporary networks in which nodes are moving without any fixed infrastructure or centralized administration. MANETs are generating lots of interest due to their dynamic topology and decentralized administration. Due to the diverse applications which use MANETs for wireless roaming it is a current research issue. There are different aspects which are taken for research like routing, synchronization, power consumption, bandwidth considerations etc. This paper concentrates on routing techniques which is the most challenging issue due to the dynamic topology ...

Performance Improvement Plan In Building Processaccording To Quality Leaders And Quality Improvement Tools And Techniques, Khaled El-Daghar

Architecture and Planning Journal (APJ)

The purpose of the study is to apply quality improvement tools and techniques to find out the root causes of performance problems in the building process. Performance refers to the way people do their jobs and the results of their works, seeking to solve a performance problem frequently implement a specific intervention, such as training without fully understanding the nature of the problem, or determining whether or not the chosen intervention is likely to succeed. Performance improvement approaches using a systematic methodology to find these root causes, and then implement interventions that applies to specific performance deficits. Performance improvement indicators ...

Rc Mini Baja Car - Suspension And Chassis, Collin Mckenzie

All Undergraduate Projects

Two students have developed a unique design of the RC Baja Car to optimize functionality and performance. A Baja car is a remote controlled 1/10 scale car that is used for recreation or competition, usually meant for competing in the ASME Baja car competition versus various schools. The competition focuses on the best time achieved in different courses that utilize speed, turns, and jumps. The objective for the project was to create a unique suspension from previous individual’s projects by creating a four-link suspension in which allows more travel in the suspension of the car and maintains functionality ...

A Performance-Based Analysis Of Balanced Mix Designs, Elias Aaron Castillo

Open Access Theses & Dissertations

The Superpave design procedure was established to provide a more representative design methodology and to minimize typical pavement distresses such as fatigue cracking and permanent deformation. This Superpave design methodology was developed on the premise that the voids in mineral aggregate can evaluate the quality and constructability of asphalt mixture during the design and production phases. With the increased use of recycled materials, recycling agents, modified binders and warm mix asphalt additives, several highway agencies including the Texas Department of Transportation (TxDOT), have investigated whether the Superpave volumetric-based design method is enough to ensure appropriate performance of the final product ...

Using Cost-Sensitive Learning And Feature Selection Algorithms To Improve The Performance Of Imbalanced Classification, Fang Feng, Kuan-Ching Li, Jun Shen, Qingguo Zhou, Xuhui Yang

Faculty of Engineering and Information Sciences - Papers: Part A

Imbalanced data problem is widely present in network intrusion detection, spam filtering, biomedical engineering, finance, science, being a challenge in many real-life data-intensive applications. Classifier bias occurs when traditional classification algorithms are used to deal with imbalanced data. As already known, the General Vector Machine (GVM) algorithm has good generalization ability, though it does not work well for the imbalanced classification. Additionally, the state-of-the-art Binary Ant Lion Optimizer (BALO) algorithm has high exploitability and fast convergence rate. Based on these facts, we have proposed in this paper a Cost-sensitive Feature selection General Vector Machine (CFGVM) algorithm based on GVM and ...

Perceived Importance And Levels Of Technical English Communication Skills Among Stakeholders In Engineering Fields, Roger Tsz Ho Ng, Alex Ying Yin Wong

Technological and Higher Education Institute of Hong Kong (THEi) Staff Publications

The purposes of this study were to examine stakeholders’ perceptions of the importance of technical English communication skills in engineering and academic teachers and industry professionals’ perceptions of current engineering students’ and graduates’ levels of technical communication skills. Survey questionnaires were designed to collect data from different research participants. The data were subsequently analysed using descriptive statistics. The study identified a discrepancy between students’ self-perceived performance on technical English communication skills and their perceived standards of these skills required by the programmes in which they were enrolled. Technical communication skills, including writing in engineering genres, essays and technical reports, reading ...

Microgel Placement And Plugging Performance In Sand Filled Fracture For Conformance Control, Baihua Lin

Masters Theses

“Preformed particle gels (PPG) has been widely applied for conformance control in heterogeneous reservoirs with fractures and super-K channels. As a plugging agent, PPG could plug the fractures or high permeability streaks and divert the displacing fluid into low permeability matrix. Many studies have been conducted to investigate the potential of PPGs as a water cut reduction and improved oil recovery agent using homogeneous sandpacks or heterogeneous core samples with man-made open fractures. However, no research has been carried out to understand how PPG injection and plugging performance will be changed if the fractures are filled with sands. Herein, the ...

Adapting Microservices In The Cloud With Faas, Mateusz Pietraszewski

Dissertations

This project involves benchmarking, microservices and Function-as-a-service (FaaS) across the dimensions of performance and cost. In order to do a comparison this paper proposes a benchmark framework.

A Case Study Of Wifi Sniffing Performance Evaluation, Yan Li, Johan Barthelemy, Shuai Sun, Pascal Perez, Bill Moran

SMART Infrastructure Facility - Papers

Mobile devices regularly broadcast WiFi probe requests in order to discover available proximal WiFi access points for connection. A probe request, sent automatically in the active scanning mode, consisting of the MAC address of the device expresses an advertisement of its presence. A real-time wireless sniffing system is able to sense WiFi packets and analyse wireless traffic. This provides an opportunity to obtain insights into the interaction between the humans carrying the mobile devices and the environment. Susceptibility to loss of the wireless data transmission is an important limitation on this idea, and this is complicated by the lack of ...

Exploring Optimization Opportunities In Non-Volatile Memory Systems, Prakhar Bansal

Creative Components

Modern storage systems utilize Non-Volatile Memories (NVMs) to reduce the performance and density gap between memory and storage. NVMs are a broad class of storage technologies, including flash-based SSDs, Phase Change Memory (PCM), Spin-Transfer-Torque Random Access-Memory (STTRAM). These devices offer low latency, fast I/Os, persistent writes, and large storage capacity compared to volatile DRAM. However, researchers are still working on the possibility of building systems that can leverage these NVMs to deliver low latency and high throughput to applications. Conventional systems were designed to persist data on hard drives, which has higher latency than NVM devices. Hence, in this ...

Novel Water-Based Nanolubricant With Superior Tribological Performance In Hot Steel Rolling, Hui Wu, Fanghui Jia, Zhou Li, Fei Lin, Mingshuai Huo, Shuiquan Huang, Sepidar Sayyar, Sihai Jiao, Han Huang, Zhengyi Jiang

Faculty of Engineering and Information Sciences - Papers: Part B

No abstract provided.

Performance Of Ballast Influenced By Deformation And Degradation: Laboratory Testing And Numerical Modeling, Buddhima Indraratna, Ngoc Trung Ngo, Cholachat Rujikiatkamjorn

Faculty of Engineering and Information Sciences - Papers: Part B

This paper presents a study on the deformation and degradation responses of railway ballast using large-scale laboratory testing and computational modeling approaches. A series of large-scale triaxial tests were carried out to investigate the ballast breakage responses under cyclic train loading subjected to varying frequencies, f=10-40  Hz. The role of recycled rubber energy-absorbing mats (REAMs) on reducing ballast breakage was also examined. Laboratory test results show that the ballast experiences significant degradation (breakage) and deformation, while the inclusion of REAMs can reduce the ballast breakage up to about 35%. Numerical modeling using the coupled discrete-continuum approach [coupled discrete-element method-finite-difference ...

Research Results Of Technological Indicators Of Linter Of Colors Construction, R.Sh. Sulaymonov, M.X. Axmedov, A.A. Ismoilov

Textile Journal of Uzbekistan

Expanding the cross-section of 5LP linter working chambers used in cotton-ginning factories did not significantly improve linear performance. When using 5LP linter saws from 320 mm to 290 mm, the height of their access to the working chamber ranges from 32 mm to 25 mm, due to the low sawing height of the saw, the bulk of the saws moving between the saw blades and the mixer is affected, causing some of the linear seeds is pulled out of the chamber to enter the working cell. In linear technology of cotton lintering of cotton ginneries according to Coordinated Cotton Processing ...

Development Of A Mix Design Adjustment Method For Fiber Reinforced Concrete And Super High Performance Concrete Based On Excess Paste, Joe Malloy

Civil and Environmental Engineering Theses, Dissertations, and Student Research

The main objective of this study was to develop a mix design adjustment method for Fiber Reinforced Concrete (FRC) that would maintain appropriate workability while improving hardened concrete performance. A literature review was conducted to examine existing methods for adjusting mix designs to account for fiber introduction. It was found that while increasing fine aggregate and cement paste content can make up for lost workability with the addition of fibers, no rational mix design adjustment method is available. Reference mix designs from the Nevada Department of Transportation and the Nebraska Department of Transportation were used, and this study focused on ...

On I/O Performance And Cost Efficiency Of Cloud Storage: A Client's Perspective, Binbing Hou

LSU Doctoral Dissertations

Cloud storage has gained increasing popularity in the past few years. In cloud storage, data are stored in the service provider’s data centers; users access data via the network and pay the fees based on the service usage. For such a new storage model, our prior wisdom and optimization schemes on conventional storage may not remain valid nor applicable to the emerging cloud storage.

In this dissertation, we focus on understanding and optimizing the I/O performance and cost efficiency of cloud storage from a client’s perspective. We first conduct a comprehensive study to gain insight into the ...