Digital Commons Network^™

Estimation Of Rfid Tag Population Size By Gaussian Estimator, Md Mahmudul Hasan

LSU Master's Theses

Radio Frequency IDenti cation (RFID) systems are prevalent in all sorts of daily life endeavors. In this thesis we propose a new method to estimate RFID tag population size. We have named our algorithm "Gaussian Estimation of RFID Tags,"namely, GERT. We present GERT under both {0,1} and {0,1,e} channel models, and in both cases the estimator we use is a well justi ed Gaussian random variable for large enough frame size based on Central Limit Theorem for triangular arrays. The most prominent feature of GERT is the quality with which it estimates a tag population size. We support all the …

Sediment Infilling Of Louisiana Continental-Shelf Dredge Pits: A Record Of Sedimentary Processes In The Northern Gulf Of Mexico, Meg Cathlin O'Connor

LSU Master's Theses

Sediment cores were collected at continental-shelf sites of the Northern Gulf of Mexico off the coast of Louisiana to develop a better understanding of post-dredging evolution of mud-capped dredge pits. The two pits studied were Sandy Point (SP) and Raccoon Island (RI) (both with water depths of ~10m and dredged to ~ 15-20 m below water surface), which were dredged in 2012 and 2013 respectively. Vibracores and multicores were collected in 2015. Preliminary radiochemistry analyses identified Beryllium-7 distribution in multicore samples from both sites. SP1, the northwestern site in the Sandy Point dredge pit, showed 26 cm of 7Be penetration. …

A Biological Comparison Of Two Sites: An Ecological Approach Using Community Ecology Metrics Based On Insect Faunal Composition, Kennedy J. Martin

University Honors Theses

Two natural sites in the Portland urban area, River View Natural Area (RVNA) and Powers Marine Park (PMP), were sampled to assess their insect faunal composition with the intention of determining whether the areas are sufficiently similar ecologically that they could potentially be managed as a single unit. The two areas were compared using community ecology metrics based on their respective invertebrate fauna. The results suggested that RVNA and PMP had statistically different ecological communities. The Shannon Diversity Index for PMP was 0.303, and 0.819 for RVNA. The Horn Index of Community Overlap suggested a 93.46% overlap based on these …

Predictive Policing On Portland State University's Campus, Kiley D. Enger

University Honors Theses

Although many want to believe that campuses are safe and free of crime acts, there is a reason for the campus public safety department. Reed College, Lewis and Clark College, and University of Portland all rank as safer schools than Portland State University (PSU) (Niche, 2017). The parking garages and lots in particular have a large number of crimes (Enger, 2016). Using predictive analytics to forecast crime is becoming very popular with large police departments within the last few years. It emphasizes the importance of collecting crime data and created a use for past incident reports. The goal of the …

Cooperative Learning Through Storytelling And The Plant World, Emma Hathaway

University Honors Theses

At a time when young people are disengaging in school, how do we begin to acknowledge that we, as a nation have failed them and how might we look at storytelling and the plant world to establish more inclusive practices in education? Data from a 2015 American Community Survey suggests that in the state of Hawai'i, 40% of public school 8^th graders do not meet the Department of Education (DOE) standards in mathematics. This fall, the National Center for Educational Statistics noted that over half of the country’s public schools reported incidents of criminal activity. As a way to …

Identifying Clouds With Convolutional Neural Networks, Jeff Mullins, Sean Richardson, Peter Drake

Portland Institute for Computational Science Publications

The greatest source of uncertainty in model estimates of projected climate change involve clouds and aerosols. Photographic images of clouds in the sky are simple to acquire and archive, but climate scientists need an automated process for identifying clouds in these images. We bring machine learning to bear on this problem. Specifically, we use convolutional neural networks, which to our knowledge have not previously been applied to this task. We trained a network to identify clear sky, thin cloud, thick cloud, and non-sky pixels in photos taken by the Total Sky Imager. The trained network is capable of classifying 91.9% …

In The Shadow Of The 2016 Election: Immigration Debates In Oregon And Beyond, Kim Williams, Andrea Williams, Phil Carrasco

Political Science Faculty Publications and Presentations

In this record of the lunchtime panel discussion moderated by Daniel J. Tichenor of the University of Oregon Wayne Morse Center for Law and Politics, panelists discussed the issue of immigration following the 2016 presidential election. Touching on the importance of discussions about immigration leading up to the election, demographics in the electorate, and how immigration advocates are mobilizing following the election, the panelists also engaged the audience with a question and answer session.

Recommending Sustainable Design Practices By Characterizing Activities And Mindsets, Jeremy Faludi

Dartmouth Scholarship

How do designers, engineers, and managers choose the best sustainable design method for their work? How can different design practices combine to complement each other? This study makes recommendations by deconstructing 14 design methods, guides, certifications, and other practices into their constituent activities and mindsets, then characterizing those activities and mindsets. For example, some of the seven activity categories are analysis, ideation, and goal-setting; some of the eight mindset categories are priorities, abstract versus concrete goals, and environmental versus social goals. Recommendations are given for matching sustainable design practices to different usage contexts by their constituent activities and mindsets. It …

Portland State Magazine, Portland State University. Office Of University Communications

Portland State Magazine

PSU’s alumni magazine, published 2-3 times a year. In this issue: Partnering with Daimler Trucks is giving students experience and jobs; inspiring the next generation of women leaders; what Antarctica is telling us about our warming planet; Robert Mercer has helped countless students navigate their way to a PSU degree; and more.

Red Pens, White Paper: Wider Implications Of Coulthard’S Call To Sovereignty, Brian Burkhart, David J. Carlson, Billy Stratton, Theodore C. Van Alst, Jr., Carol Edelman Warrior

Indigenous Nations Studies Faculty Publications and Presentations

Transcript of a plenary roundtable conversation focused on Glen Coulthard's book Red Skins, White Masks, presented at the Native American Literature Symposium at the Isleta Resort and Casino in Albuquerque, NM, on Thursday March 17, 2016.Participating were Theo (Ted) Van Alst (Uof Montana), Carol Edelman Warrior (Cornell University), Brian Burkhart (California State University, Northridge), Billy Stratton (Uof Denver) and David J. Carlson (California State University, San Bernardino).The material printed here consists of revised versions of the remarks made by the panelists at NALS, reflecting ongoing conversation that continued, over email, after the conference ended.

Towards An Intellectual History Of Evolutionary Economics: Competition And Struggle Versus Cooperation And Mutual Aid, John B. Hall, Svetlana Kirdina-Chandler

Economics Faculty Publications and Presentations

Our inquiry considers the origins of Evolutionary Economics by reintroducing a debate that took place in Russia in the 19th and early 20th century. Responses to Charles Darwin’s The origin of Species are considered, especially critiques stressing Darwin’s emphasis upon competition and struggle in natural selection, that can be traced directly to Thomas Robert Malthus. Considering challenging contributions made by several Russian scholars, we place special emphasis upon Peter Kropotkin’s focus on cooperation and “mutual aid” in natural selection and evolution. We then speculate upon the commonality found in the evolutionary views advanced by Kropotkin and his American contemporary, Thorstein …

Cyberpdx: A Camp For Broadening Participation In Cybersecurity, Wu-Chang Feng, Robert Liebman, Lois Delcambre, Michael Mooradian Lupro, Tim Sheard, Scott Britell, Gerald W. Recktenwald

University Studies Faculty Publications and Presentations

With society’s increasing dependence on technology infrastructure, the importance of securing the computers, networks, data, and algorithms that run our digital and physical lives is becoming critical. To equip the next generation of citizens for the challenges ahead, an effort is underway to introduce security content early in a student’s academic career. It is important that these efforts broaden participation and increase diversity in the field. While many camps and curricula focus on introducing technical content and skills related to cybersecurity, such approaches can prematurely limit how students view career opportunities in the field, potentially limiting those who ultimately pursue …

Pdxscholar Annual Report 2016, Karen Bjork, Sherry Buchanan, David Coate, Bertrand Robinson, Stacey Schlatter

Library Faculty and Staff Publications and Presentations

This report details the sixth year of operation for PDXScholar, Portland State University's institutional repository, as well as the growth of Portland State University Library's publishing services. The report covers the period between January 1, 2016 and December 31, 2016.

Do Direct Behavior Rating-Single Item Scales (Dbr-Sis) Help Students With Attention Deficit Hyperactivity Disorder Self-Regulate?, Regina M. Hildenbrand-Moore

All-Inclusive List of Electronic Theses and Dissertations

As accountability of teachers has been pushed to the forefront, it has been speculated that tolerance for students with behavior problems will dissipate (Menzies & Lane, 2011). Strategies that are efficient and effective are needed to help monitor behavior change and to help students learn to regulate their behavior. Attention-Deficit/Hyperactivity Disorder (ADHD) is the most common disorder of self-regulation (Barkley, 1997). An estimated three million children in the United States take medications for attention and behavior problems associated with deficits in self-regulation (Olfson, Marcus, Weissman, & Jensen, 2002). Self-regulation interventions have been proposed as methods that are effective in increasing …

Effect Of Directed Study Of Mathematics Vocabulary On Standardized Mathematics Assessment Questions, Adel Marlane Waite

All-Inclusive List of Electronic Theses and Dissertations

The problems under investigation included (a) Did a directed study of mathematics vocabulary significantly affect student performance levels on standardized mathematical questions? and (b) Did the strategies used in this study significantly affect student performance levels on standardized mathematical questions? The population consisted of eighth-grade pre-algebra students from two different middle schools in southern Indiana. This quasi-experimental study was of a quantitative, repeated-measures design, using a population of approximately 140 eighth-grade students with a control sample of 37 and an experimental sample of 52. I performed a repeated measures ANCOVA to analyze scores from a mathematics vocabulary posttest for each …

The Psychometric Characteristics Of Two Versions Of A Mathematics Test In Middle School "A Comparative Study, Taghreed Hijazi, Naif Alsharif

Journal of Educational and Psychological Studies

The study aimed to investigate the psychometric properties of mathematics achievement test using two versions (paper-pencil and online). The two versions of three mathematics achievement tests were applied on a sample consisting of 958 students distributed to lst, 2nd and 3rd preparatory grades. Each test consisted of 30 items with four alternatives to measure students' problem solving skills and the scientific concepts. The sample of the study was randomly stratified and clustered selected. Item difficulty coefficients of the paper-pencil mathematics achievement test ranged between O.28-0.70, 0.38- 0.62, 048-070 for the lst, 2nd and 3rd preparatory grades respectively. There was between …

The Effect Of Teaching Science Using Mccarthy's' Model (4 Mat) On The 8th Grade Students' Retention Of Learning In Jordan, Abdelsalam M. Adili

Journal of Educational and Psychological Studies

This study aimed at finding the effect of using McCarthy's' Model (4 MAT) on 8th grade students' retention of learning in Jordan. The subjects of the study consisted of 86 students from the eighth grade from one Zarqa city school in the second semester of the academic year 2014/2015. The sample was divided into two groups: the experimental group which was taught using 4 MAT model, and the control group which learned in the traditional way. To achieve the objectives of the study, a quasi-experimental approach was followed, and the researcher prepared a valid and reliable achievement test which aimed …

Longer-Term Impact Of Highand Low Temperature On Mortality: An International Study To Clarify Length Of Mortality Displacement, Ben Armstrong, Michelle Bell, Micheline De Sousa Zanotti Stagliorio Coelho, Yue Liang Leon Guo, Yuming Guo, Patrick J. Goodman, Masahiro Hashizume, Yasushi Honda, Ho Kim, Eric Lavigne, Paola Michelozzi, Paulo Hilario Nascimento Saldiva, Joel Schwartz, Matteo Scortichini, Francesco Sera, Aurelio Tobias, Shilu Tong, Chang Fu Wu, Antonella Zanobetti, Ariana Zeka, Antonio Gasparrini

Articles

In many places, daily mortality has been shown to increase after days with particularly high or low temperatures, but such daily time-series studies cannot identify whether such increases reflect substantial life shortening or short-term displacement of deaths (harvesting).

Subjective Usability, Mental Workload Assessments And Their Impact On Objective Human Performance, Luca Longo

Articles

Self-reporting procedures and inspection methods have been largely employed in the fields of interaction and web-design for assessing the usability of interfaces. However, there seems to be a propensity to ignore features related to end-users or the context of application during the usability assessment procedure. This research proposes the adoption of the construct of mental workload as an additional aid to inform interaction and web-design. A user-study has been performed in the context of human-web interaction. The main objective was to explore the relationship between the perception of usability of the interfaces of three popular web-sites and the mental workload …

A Conceptual Framework For A Software Development Process Based On Computational Thinking, Catherine Higgins, Ciaran O'Leary, Orla Hanratty, Fredrick Mtenzi

Articles

A software development process is a mechanism for problem solving to help software developers plan, design and structure the development of software to solve a problem. Without a process to guide the structured evolution of a solution, it is extremely likely that at least some aspect of the resulting software will be omitted or incorrectly implemented. Even though the importance of utilising a software process for solving problems is accepted in the business and academic communities, it is a topic that is addressed very lightly (if at all) in most freshman undergraduate computing courses with most courses focussing on programming …

Operator Locality In The Quantum Simulation Of Fermionic Models, Vojtěch Havlíček, Matthias Troyer, James D. Whitfield

Dartmouth Scholarship

Simulating fermionic lattice models with qubits requires mapping fermionic degrees of freedom to qubits. The simplest method for this task, the Jordan-Wigner transformation, yields strings of Pauli operators acting on an extensive number of qubits. This overhead can be a hindrance to implementation of qubit-based quantum simulators, especially in the analog context. Here we thus review and analyze alternative fermion-to-qubit mappings, including the two approaches by Bravyi and Kitaev and the Auxiliary Fermion transformation. The Bravyi-Kitaev transform is reformulated in terms of a classical data structure and generalized to achieve a further locality improvement for local fermionic models on a …

Student Surveillance, Racial Inequalities, And Implicit Racial Bias, Jason P. Nance

UF Law Faculty Publications

In the wake of high-profile incidents of school violence, school officials have increased their reliance on a host of surveillance measures to maintain order and control in their schools. Paradoxically, such practices can foster hostile environments that may lead to even more disorder and dysfunction. These practices may also contribute to the so-called “school-to-prison pipeline” by pushing more students out of school and into the juvenile justice system. However, not all students experience the same level of surveillance. This Article presents data on school surveillance practices, including an original empirical analysis of restricted data recently released by the U.S. Department …

Using Thermal Infrared Imagery To Estimate Soil Hydraulic Parameters: A Novel Approach, Matthew B. Thomas

Undergraduate Theses, Professional Papers, and Capstone Artifacts

In this study, skin temperature measured with a thermal infrared (TIR) camera was used to estimate soil hydraulic parameters. These physical properties that control how soils transport and retain water are notoriously difficult to measure in the field due to spatial variability. Laboratory experiments were set up to record surface skin temperature response in a clean soil column using a TIR camera after an artificial wetting event. An array of thermocouples, a net radiometer, heat flux sensor and weather station were used to constrain the TIR data and the energy budget during the experiment. The soil column surface was then …

A Retrospective On George Macdonald: Poet, Novelist, Preacher, Roderick Mcgillis

North Wind: A Journal of George MacDonald Studies

No abstract provided.

Constructing A Sense Of Story: One Block At A Time, Joanne M. Robertson-Eletto, Smita Guha, Marina Marinelli

Graduate School of Education Publications and Research

This photo essay focuses upon the literacy practices of two groups of preschoolers as they built, illustrated, and dictated stories in response to their participation in a “Castle Project.” Data, including literacy artifacts, photodocumentation, sociodramatic play scenarios, and conversations are qualitatively analyzed, coded, and evaluated over a three month period. We use a narrative approach to describe the three- and four-year-olds’ talk, actions, and ideas, and the ways block play facilitated their sense of story and motivation to write. We suggest a reciprocity of thinking between the building and composing processes. Preschoolers’ story ideas, we deduce, were conceptualized and rehearsed …

A Study Of High Temperature Heat Pipes And The Impact Of Magnetic Field On The Flow Of Liquid Metal, Udit Sharma

Dissertations, Master's Theses and Master's Reports

A study of high temperature heat pipe was conducted to understand its characteristics. A review of working fluid, temperature, wick structure, problems, operational limit and applications was done. Alkali metal were concluded as the most viable candidate for the working fluid.

The impact of three parameters namely magnetic field, heat flux and temperature was analyzed on the performance of HTHP (High Temperature Heat Pipe). The presence of magnetic field had the most considerable impact on reducing the pumping limit of the heat pipe while the temperature had almost negligible effect. Magnetic field results in the pressure drop and adversely affect …

Using Remote Site Incubators For Re-Introduction Of Arctic Graylng (Thymallus Arcticus) To The Big Manistee Watershed, Sunflower Wilson

Dissertations, Master's Theses and Master's Reports

Remote Site Incubators (RSIs) were developed for the incubation of salmonid eggs directly at a field site to enhance success and imprinting of young. These have been employed in the re-establishment of Arctic Grayling in Montana and are being laboratory tested for possible reintroduction of this species in the Big Manistee River, MI. Arctic Grayling, Rainbow and Brook Trout eggs, obtained from state hatcheries, were reared in a laboratory using flow through lake water to assess egg and fry survival using RSIs. Dead eggs and fry were removed daily and observations of developmental stages recorded. Rainbow Trout eggs were evaluated …

Analysis Of Aeroelastic Effects On The 3-Dimensional Interference Of Wind-Turbine Rotors, Anurag Rajan

Dissertations, Master's Theses and Master's Reports

Greater penetration of wind energy demands better utilization of available wind. This has led to a formidable increase in the rotor diameter over the past few years. Bigger rotors call for lighter, more flexible blades to reduce loads and improve fatigue life. As a result, future blades will deform substantially more than the relatively stiff blades of the past. More efficient use of wind power also calls for incorporating advanced active and passive control strategies and increasing the range of velocities over which wind energy is captured. Hence an improvement in the quality of numerical simulations capable of capturing the …

Control Of A Powered Ankle-Foot Prosthesis: From Perception To Impedance Modulation, Guilherme Aramizo Ribeiro

Dissertations, Master's Theses and Master's Reports

Active ankle prostheses controllers are demonstrating gaining smart features to improve the safety and comfort offor users. The perception of user intention to modulate the ankle dynamics is a well-known example of such feature. But not much work focused on the perception of the environment, nor how the environment should be included in the mechanical design and control of the prosthesisprostheses. The proposed work aims to improve the feasibility of integrate the environment perception integration intoto the prostheses controllersler, and to define the desired ankle dynamics, as mechanical impedance, duringof the human walk on different environmental settings. As a preliminary …

Modeling Mass And Thermal Transport In Thin Porous Media Of Pem Fuel Cells, Vinaykumar Konduru

Dissertations, Master's Theses and Master's Reports

Water transport in the Porous Transport Layer (PTL) plays an important role in the efficient operation of polymer electrolyte membrane fuel cells (PEMFC). Excessive water content as well as dry operating conditions are unfavorable for efficient and reliable operation of the fuel cell. The effect of thermal conductivity and porosity on water management are investigated by simulating two-phase ow in the PTL of the fuel cell using a network model. In the model, the PTL consists of a pore-phase and a solid-phase. Different models of the PTLs are generated using independent Weibull distributions for the pore-phase and the solid-phase. The …