Engineering Commons^™

Scheduling Based On Interruption Analysis And Pso For Strictly Periodic And Preemptive Partitions In Integrated Modular Avionics, Hui Lu, Qianlin Zhou, Zongming Fei, Rongrong Zhou

Computer Science Faculty Publications

Integrated modular avionics introduces the concept of partition and has been widely used in avionics industry. Partitions share the computing resources together. Partition scheduling plays a key role in guaranteeing correct execution of partitions. In this paper, a strictly periodic and preemptive partition scheduling strategy is investigated. First, we propose a partition scheduling model that allows a partition to be interrupted by other partitions, but minimizes the number of interruptions. The model not only retains the execution reliability of the simple partition sets that can be scheduled without interruptions, but also enhances the schedulability of the complex partition sets that …

Orbital Angular Momentum Generation And Detection By Geometric-Phase Based Metasurfaces, Menglin L.N. Chen, Li (Lijun) Jun Jiang, Wei E.I. Sha

Electrical and Computer Engineering Faculty Research & Creative Works

We present a comprehensive review on the geometric phase based metasurfaces for orbital angular momentum (OAM) generation and detection. Thesemetasurfacesmanipulate the electromagnetic (EM) wave by introducing abrupt phase change, which is strongly dependent on the polarization state of incident EMwave and can be interpreted by geometric phase. Hence, the conventional bulk devices that based on the accumulated phase change along the optical path can be avoided.

Physical And Chemical Interactions Affecting U And V Transport From Mine Wastes, Sumant Avasarala

Civil Engineering ETDs

This research investigates the physical and chemical interactions that affect the transport of uranium (U) and vanadium (V) from uranium mine waste sites by integrating laboratory experiments and reactive transport modelling with various spectroscopy, microscopy, and diffraction techniques. The document consists of results from three related studies. In the first study (Chapter 3), the reactive transport of U and V was investigated by sequentially reacting mine wastes collected from Blue Gap/Tachee Claim-28 mine site, AZ with 10mM NaHCO₃ (7.9) and 10mM CH₃COOH (3.4) during continuous flow through column experiments. Under both of these conditions (pH 3.4 and …

Test Standard For Determining The Flexural Strength And Stiffness Of Cold-Formed Steel Nonstructural Members, 2017 Edition, American Iron And Steel Institute

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.

Safety Videos For Major Shop Equipment In Cal Poly Brae Lab 1, Trey Joseph Johnston

Agricultural Education and Communication

At California Polytechnic State University, San Luis Obispo, students from all majors can take a variety of classes in the BioResource and Agriculture Engineering Department (BRAE). It is essential for future high school mechanics educators to learn the basic shop tools and the importance of safety in the laboratory. In shop 1 of the BRAE Department, there are many different tools students will find in a mechanics classroom. The five main power tools are the Table Saw, Drill Press, Bench Grinder, Radial Arm Saw, and Disk/Belt Sander.

In BRAE 121 Agricultural Mechanics, students learn basic shop skills about lab safety …

A Novel Approach To Visualize And Quantify The Transient Air Infiltration/Exfiltration In Walk-In Coolers, Ramin Faramarzi, Homayun K. Navaz, K. Kamensky

Mechanical Engineering Publications

Walk-in coolers are room-sized, insulated, and refrigerated compartments for food product storage. Walk-ins have areas equal or below 280 m2 (3,000 ft2), and are classified either as coolers operating above 0 degrees C (32 degrees F) (medium-temperature) to store fresh fruit, vegetables, and dairy products, or freezers that operate below 0 degrees C (32 degrees F) (low-temperature) to meet health and safety standards of frozen food products. Walk-ins are typically found in restaurants as well as small- and medium-to-large grocery stores or supermarkets.

The Santa Clara, 2018-03-01, Santa Clara University

The Santa Clara

No abstract provided.

Illuminator, Volume 1, Issue 6, Batten College Of Engineering & Technology, Old Dominion University

College of Engineering & Technology Newsletter

March 2018 issue of Illuminator, a monthly publication of ODU's Batten College of Engineering and Technology.

Sensel Morph: Product Communication Improvement Initiative, Kasper W. Lui-Delange, Samuel Distler, Rafael Paroli

Industrial and Manufacturing Engineering

Sensel is a startup company that recently launched their first product. The Morph is a multi-functional touch interface that interacts with a wide range of software through touching enabled silicon overlays. The support documentation was believed to cause confusion, which is leading to limited sales and increased returns. We focused on the structures of its website and product documentation, which were initially developed without end user testing. Our team explored Sensel’s current state to develop two multiphase design alternatives. These designs provide multiple user-facing testing frameworks as well as determine the root-cause of the Morph’s current communication issues. The designs …

Improving Warehouse Capacity For Synergy Manufacturing, Brian Garcia

Industrial and Manufacturing Engineering

This report aims to aid Synergy Manufacturing (a well-recognized producer of high-performance components for off-roading vehicles) to improve in-house production capacity in wake of an expanded facility space and substantial increase in the number of current available products over the span of a few years. Current warehouse issues include struggling to meet demand, high inventory, and an unsafe overcrowding of WIP on the floor space. The steps taken to resolve these issues are to collect setup times, operational times, total process times, machine tool usage, and flow process from a selected group of five high-demand items from Synergy Manufacturing’s current …

Anatomy Of Stem Teaching In North American Universities, Paul J. Wendel, Joan M. Esson, Kathryn M. Plank, Anna M. Young

Education Faculty Scholarship & Creative Works

A large body of evidence demonstrates that strategies that promote student interactions and cognitively engage students with content lead to gains in learning and attitudinal outcomes for students in science, technology, engineering, and mathematics (STEM) courses. Many educational and governmental bodies have called for and supported adoption of these student centered strategies throughout the undergraduate STEM curriculum.

Space-Angle Signal Processing Using A Modulated Scatter Array, Nasr Alkhafaji

Electrical and Computer Engineering PhD Day

A UHF signal processing technique is described in the Fourier Space-Angle domain that uses an array of scattering elements with reflection coefficients modulated at baseband. The illumination arrival angle distributes a UHF phase across the array, and the baseband modulator phase at each of the array elements determines the radiation angle of the desired scattered product. Undesired products are re-radiated in different directions. Example 1, 2 and 4 element arrays operate at 432 MHz array with 700 Hz modulation. 2 element arrays cancel one sideband, and the 4 element array cancels both the undesired sideband and 2nd order products. Reflection …

A Survey On Network Security-Related Data Collection Technologies, Huaqing Lin, Zheng Yan, Yu Chen, Lifang Zhang

Faculty Publications, Information Systems & Technology

Security threats and economic loss caused by network attacks, intrusions, and vulnerabilities have motivated intensive studies on network security. Normally, data collected in a network system can reflect or can be used to detect security threats. We define these data as network security-related data. Studying and analyzing security-related data can help detect network attacks and intrusions, thus making it possible to further measure the security level of the whole network system. Obviously, the first step in detecting network attacks and intrusions is to collect security-related data. However, in the context of big data and 5G, there exist a number of …

The Quest For Hydrological Signatures: Effects Of Data Transformation On Bayesian Inference Of Watershed Models, Mojtaba Sadegh, Morteza Shakeri Majd, Jairo Hernandez, Ali Torabi Haghighi

Civil Engineering Faculty Publications and Presentations

Hydrological models contain parameters whose values cannot be directly measured in many field-scale projects, hence need to be meaningfully inferred through calibration against historical records. Much progress has been made in development of efficient search algorithms in order to find optimal parameter values and their underlying uncertainty distributions. Yet, relatively little is known about the effects of calibration data (or error residual) transformations on the identifiability of model parameters and reliability of model predictions. Effects of calibration data transformations on the posterior parameter distribution and predictive capability of two parsimonious hydrological models are analyzed herein. Our results depict that calibration …

Building A Database For A Startup: Boltabout, Danielle Tran

Industrial and Manufacturing Engineering

BoltAbout is a young start-up based out of San Luis Obispo, CA. Their primary business is renting out bikes via monthly-subscription with the opportunity to lease to own. BoltAbout has seen great success over the past 2 years and is looking to expand. The company currently has 200 bikes, but the demand is far outweighing the supply. The CEO of BoltAbout hopes to grow to grow the company’s inventory to 500 bikes by the end of 2017 and 1500 by the end of the school year. As the company continues to expand, it will need to be able to accurately …

Crystal Engineering Manufacturing Facility Analysis, Maximiliano Cortes, Eric Dustin Kornrumpf, Sthefano Alvarado

Industrial and Manufacturing Engineering

This report will encompass a two-quarter long senior project effort to provide a recommendation for the client, Crystal Engineering. Crystal Engineering is currently in the process of introducing three new products, one now and two within the next six months. However, their existing lines already occupy the available production space and as a result, they are unable to determine how to effectively incorporate new production lines within the facility. Therefore, the main objectives of this project were to deliver several facility redesign layouts backed by a holistic justification for each. The formulation of the facility redesign layouts incorporated several industrial …

Fire And Life Safety Analysis- College Campus Building, Jacob Ludeman

Fire Protection Engineering: Culminating Experience Project Reports

A Fire and Life Safety Analysis was performed as an academic exercise as part of the MS Fire Protection Engineering Program of California Polytechnic State University, San Luis Obispo. The project is a culminating report with regards to prescriptive based and performance based aspects for the fire and life safety analysis of a project building. These analyses were performed on a building located on a college campus in Southern California and is to remain nameless upon the request of the owner and architect. The building is in the School of Physical Sciences at the University it resides. The building houses …

A Digital Image Analysis Of Gravel Aggregate Using Ct Scanning Technique, Jiangfeng Wu, Linbing Wang, Yue Hou, Haocheng Xiong, Yang Lu, Lei Zhang

Civil Engineering Faculty Publications and Presentations

Particle shape was one of the most important factors which affects the gravel aggregate’s properties. It was also one of the important factors that directly affects the performance of asphalt pavements. In this paper, the gravel aggregate of quartzite was studied by using the industrial CT instrument. MATLAB was used to capture the aggregate slice properties including reverse color, median filtering, noise reduction, binarization and so on. The 3D aggregate model was reconstructed by using the software of MIMICS. The three-dimensional model of the aggregate was further optimized. The best fitting cuboid, cylinder, cone and sphere information of the aggregate …

Inspire E-News 03 2018, College Of Engineering And Applied Sciences

College of Engineering and Applied Sciences News

• Give a Slice on Pi Day -- March 14
• WMU to host regional steel bridge, concrete canoe competitions
• Saeed honored with distinguished research award
• MVP Award goes to Engelmann
• Save the date: Custer Talk March 20
• College Snapshot: Give A Slice on Pi Day

From A Locally Competitive Algorithm To Sensory Relevance Models, Walter Woods

Electrical and Computer Engineering PhD Day

This poster addresses the development of a new Machine Learning (ML) mechanism, the Sensory Relevance Model (SRM), as a means of splitting information processing tasks into two sub-tasks with more intuitive properties. Specifically, SRMs are a front-end for other ML techniques, re-mapping the input data to a similar space with significantly more sparsity, achieved through the transformation and suppression of inputs irrelevant to the task. Prior work has attempted to reveal this information for Neural Networks (NNs) either as a post-processing step via saliency maps or through a simple masking of the input achieved with a dot product (so-called ``attention'' …

Coaxial Magnetic Gearbox With A Flux Concentration Halbach Rotor And Consequent Pole Rotor Typology, Ho Yin Wong

Electrical and Computer Engineering PhD Day

This paper presents the performance comparison between a flux concentration and triple permanent magnet consequent pole magnetic gear rotor typology with the same 7.5:1 gear ratio. The triple permanent magnet consequent pole magnetic gear is unique in that it can create torque change through two field heterodyning pole combinations. The performance with respect to volumetric and mass torque density is considered. It is shown that the flux concentration typology can operate with a higher mass and volumetric higher torque density, even when using a low flux concentration ratio rotor.

Magnetically Geared Lead Screw, Mojtaba Bahrami Kouhshahi

Electrical and Computer Engineering PhD Day

New magnetically geared lead screw (MGLS) is proposed in this work, which relies only on magnetic loading. Therefore it can provide speed and force conversion like its mechanical counterparts, but unlike the mechanical gears, a MGLS contact-less operation enables it to operate without lubrication and it can operate with low noise, and higher efficiency. Its reliance on magnetic loading also provides overload protection. MGLS combines the concepts of two previously proposed actuators named linear magnetic gear (LMG) and magnetic lead screw (MLS). However, unlike the LMG and MLS the translator on a MGLS does not contain magnets and therefore for …

Construction Innovation Center- Fire And Life Safety Analysis, Matthew Atwell

Fire Protection Engineering: Culminating Experience Project Reports

In this report you will find the analysis of existing fire protection systems and features that are installed in the Construction Innovation Center at California Polytechnic State University, San Luis Obispo. The Buildings construction was completed in 2008 and is separated into three separate buildings A, B, and C connected by an exterior balcony. This report is separated into two separate analysis Prescriptive and Performance.

The Prescriptive analysis reviews the buildings means of egress, fire alarm systems, the suppression systems, and the structural fire protection. The Prescriptive-based analysis of the Construction Innovation Center confirms that the building meets the requirements …

Building 43: Recreation Center - Cal Poly San Luis Obispo, Daniel Gonzalez

Fire Protection Engineering: Culminating Experience Project Reports

The purpose of this project is to analyze the Fire Protection systems of the Recreation Center on campus at California Polytechnic State University, San Luis Obispo. Only the building itself is analyzed in this project. This report provides both a prescriptive-based and performance-based analysis of the building. The prescriptive-based analysis includes an overview of the structural components and their fire resistance, the sprinkler system, the fire alarm system, as well as an egress analysis. The performance-based analysis consists of three different potential fire scenarios, with the first being modeled with both Pathfinder and Pyrosim. Resources used are the building’s floor …

Dermal Uptake Of Nicotine From Air And Clothing: Experimental Verification, G. Bekö, Glenn Morrison, C. J. Weschler, H. M. Koch, C. Pälmke, T. Salthammer, T. Schripp, A. Eftekhari, J. Toftum, G. Clausen

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

This study aims to elucidate in greater detail the dermal uptake of nicotine from air or from nicotine-exposed clothes, which was demonstrated recently in a preliminary study. Six non-smoking participants were exposed to gaseous nicotine (between 236 and 304 μg/m3) over 5 hours while breathing clean air through a hood. Four of the participants wore only shorts and 2 wore a set of clean clothes. One week later, 2 of the bare-skinned participants were again exposed in the chamber, but they showered immediately after exposure instead of the following morning. The 2 participants who wore clean clothes on week 1 …

Me-Em Enewsbrief, March 2018, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University

Department of Mechanical and Aerospace Engineering eNewsBrief

No abstract provided.

Joint Pilot Allocation And Robust Transmission Design For Ultra-Dense User-Centric Tdd C-Ran With Imperfect Csi, Cunhua Pan, Hani Mehrpouyan, Yuanwei Liu, Maged Elkashlan, Arumugam Nallanathan

Electrical and Computer Engineering Faculty Publications and Presentations

This paper considers the unavailability of complete channel state information (CSI) in ultra-dense cloud radio access networks (C-RANs). The user-centric cluster is adopted to reduce the computational complexity, while the incomplete CSI is considered to reduce the heavy channel training overhead, where only large-scale inter-cluster CSI is available. Channel estimation for intra-cluster CSI is also considered, where we formulate a joint pilot allocation and user equipment (UE) selection problem to maximize the number of admitted UEs with fixed number of pilots. A novel pilot allocation algorithm is proposed by considering the multi-UE pilot interference. Then, we consider robust beam-vector optimization …

Understanding Homogeneous Nucleation In Solidification Of Aluminum By Molecular Dynamics Simulations, A. Mahata, Mohsen Asle Zaeem, M. I. Baskes

Materials Science and Engineering Faculty Research & Creative Works

Homogeneous nucleation from aluminum (Al) melt was investigated by million-atom molecular dynamics simulations utilizing the second nearest neighbor modified embedded atom method potentials. The natural spontaneous homogenous nucleation from the Al melt was produced without any influence of pressure, free surface effects and impurities. Initially isothermal crystal nucleation from undercooled melt was studied at different constant temperatures, and later superheated Al melt was quenched with different cooling rates. The crystal structure of nuclei, critical nucleus size, critical temperature for homogenous nucleation, induction time, and nucleation rate were determined. The quenching simulations clearly revealed three temperature regimes: sub-critical nucleation, super-critical nucleation, …

Correlation For Sessile Drop Evaporation Over A Wide Range Of Drop Volatilities, Ambient Gases And Pressures, Peter Kelly-Zion, Christopher J. Pursell, Gregory N. Wassom, Brenton V. Mandelkorn, Chris Nkinthorn

Engineering Faculty Research

A correlation for the evaporation of sessile drops over a very broad range of conditions was developed based on measured evaporation rate data obtained for drops of acetone, methanol, and six hydrocarbons ranging from hexane to isooctane, evaporating in air, helium, argon, and krypton, over a range of ambient pressures from 96 kPa to 615 kPa. The experiments were designed to produce a large variation in the rates of diffusion and buoyancy-induced (natural) convection of the vapor phase amongst the experimental conditions. The correlation, which fits the measurements with an RMS relative error of 5.2%, is a simple equation involving …

Organizimi I Ndërtimit Të Fushës Sportive Në Fshatin Bolevc Të Komunës Së Kamenicës, Shqiprim Thaqi

Theses and Dissertations

Menaxhimi dhe shkenca e organizimit të ndërtimit ka rëndësi të madhe për zhvillimin e një shoqërie bashkëkohore. Menaxhimi nëpërmjet planifikimit, organizimit, udhëheqjes dhe kontrollit të resurseve organizative, arrin qëllimin organizativ në mënyrë efikase. Të gjitha teknikat e menaxhimit fillojnë nga stili kooperativ i udhëheqjes si teknika të ndërmarrjes. Qëllimi kryesor i këtij studimi është që të analizohet mënyra e organizimit të një projekti ndërtimor me profesionalizëm sipas standardeve dhe rregullave ndërtimore. Si duhet të bëhet organizimi i mirëfilltë i një projekti ndërtimor duke përfshirë punimin e paramasës dhe parallogarisë, si dhe të planeve dinamike? Cila është mënyra e punës dhe …