Digital Commons Network^™

Sdpt3r: Semidefinite Quadratic Linear Programming In R, Adam Rahman

The R Journal

We present the package sdpt3r, an R implementation of the Matlab package SDPT3 (Toh et al., 1999). The purpose of the software is to solve semidefinite quadratic linear programming (SQLP) problems, which encompasses problems such as D-optimal experimental design, the nearest correlation matrix problem, and distance weighted discrimination, as well as problems in graph theory such as finding the maximum cut or Lovasz number of a graph.

Current optimization packages in R include Rdsdp, Rcsdp, scs, cccp, and Rmosek. Of these, scs and Rmosek solve a similar suite of problems. In addition to these …

Geospatial Point Density, Paul F. Evangelista, David Beskow

The R Journal

This paper introduces a spatial point density algorithm designed to be explainable, meaning ful, and efficient. Originally designed for military applications, this technique applies to any spatial point process where there is a desire to clearly understand the measurement of density and maintain fidelity of the point locations. Typical spatial density plotting algorithms, such as kernel density estimation, implement some type of smoothing function that often results in a density value that is difficult to interpret. The purpose of the visualization method in this paper is to understand spatial point activity density with precision and meaning. The temporal tendency of …

Lmridge: A Comprehensive R Package For Ridge Regression, Muhammad Imdad Ullah, Bahauddin Zakariya University Aslam, Saima Atlaf

The R Journal

The ridge regression estimator, one of the commonly used alternatives to the conventional ordinary least squares estimator, avoids the adverse effects in the situations when there exists some considerable degree of multicollinearity among the regressors. There are many software packages available for estimation of ridge regression coefficients. However, most of them display limited methods to estimate the ridge biasing parameters without testing procedures. Our developed package, lmridge can be used to estimate ridge coefficients considering a range of different existing biasing parameters, to test these coefficients with more than 25 ridge related statistics, and to present different graphical displays of …

Discovery Of Paleotsunami Deposits Along Eastern Sunda Arc: Potential For Megathrust Earthquakes In Bali, Hanif Ibadurrahman Sulaeman

Theses and Dissertations

Several laterally extensive candidate tsunami deposits are preserved along coastlines facing the eastern Java Trench, indicating it has experienced mega-thrust earthquakes in the past. We investigated 37 coastal sites in Bali, Lombok, Sumba and Timor islands, many of which preserve course sand and pebble layers that overlie sharp basal contacts with scour marks into the mud, fine upward in grain size, and have bimodal grain size distributions. Other unique features are the common occurrence of marine fossils and concentrations of heavy minerals. The occurrence of these high-energy deposits interlayered with clay-rich units indicates the coarse clastics are anomalous because they …

Wall Shear Stress In Simplified And Scanned Avian Respiratory Airways, Michael Sterling Farnsworth

Theses and Dissertations

Birds uniquely produce sound through a vocal organ known as a syrinx. The presence of wall shear stress acting on the airway cells of any organism will affect how airway cells develop and multiply. Unique features of avian airway geometry and breathing pattern might have contributed to the development of the syrinx. This thesis examines wall shear stress in the trachea and first bronchi of avian geometries using computational fluid dynamics. The computational fluid dynamic simulations underwent grid- and time-independence studies and were validated using particle image velocimetry. Parameters such as bird size, bronchial branching angle, and breathing waveform were …

Security Analysis And Recommendations For Coniks As A Pki Solution For Mobile Apps, George Bradley Spendlove

Theses and Dissertations

Secure mobile apps, including end-to-end encrypted messaging apps such as Whats-App and Signal, are increasingly popular today. These apps require trust in a centralized key directory to automatically exchange the public keys used to secure user communication. This trust may be abused by malicious, subpoenaed, or compromised directories. A public key infrastructure (PKI) solution that requires less trust would increase the security of these commonly used apps.CONIKS is a recent PKI proposal that features transparent key directories which publish auditable digests of the public keys they present to queriers. By monitoring its key every time a new digest is published, …

Audio To Architecture: House Music As A Form Generator, Polina Timchenko

Architecture Undergraduate Honors Theses

Contemporary music undergoes similar process of creation to that of the design process through computation and variation. House music as a representation of contemporary culture has a layered structure that allows specific characteristics to identify it as house music. Song components can vary and mix in different orders that form new dynamic compositions. I am going to explore the idea that every house music component can be translated into geometry with the use of parametric design techniques.

Impact Of Bubble Baths On Stainless Steel Sphere Water Entry, Wesley Robinson

Physics Capstone Projects

Soap Bubbles on the water surface would seem to be an intuitive means for splash suppression, but their presence appears to be a double edged sword. We present on the water entry of hydrophilic spheres where the liquid surface is augmented by the presence of a bubble layer, similar to a bubble bath. While the presence of a bubble layer can diminish splashing upon impact at low Weber numbers, it also induces cavity formation at speeds below the critical velocity. The formation of a cavity generally results in larger Worthington jets and thus, larger amounts of ejected liquid. Bubble layers …

Career And Technical Education On Mathematics And Reading Achievement For Students In North Central Arkansas, Kimberley Sartain

College of Education Dissertations

The purpose of this quantitative research study was to determine the effects of gender and Career and Technical Education (CTE) participation level on the mathematics and reading achievement as measured by the ACT Aspire for 10th-grade students and ACT subtest assessments for 11th-grade students in 2 5-A high schools in North Central Arkansas. While researching the effects of gender and CTE participation level, this scholar found no statistically significant difference between gender and CTE participation level on student achievement. This researcher explored the literature relating to the mathematic and reading achievement of males and females as well as whether they …

Antitrust Remedies For Labor Market Power, Suresh Naidu, Eric A. Posner, E. Glen Weyl

Articles

No abstract provided.

The Ratio Of Observed To Expected: How Much Of It Is Unexpected?, Jens R Chapman, Karsten Wiechert, Jeffrey C Wang

Articles, Abstracts, and Reports

No abstract provided.

Father Involvement: Conceptualizing, Synthesizing, And Testing The Effects On Children’S Behavioral, Socioemotional, And Educational Outcomes At Middle Childhood, Jamel T. Slaughter

Social Work Dissertations - Archive

A systematic search was conducted across eight databases using the keywords: “measure*, scale*, father* or paternal*, and involve*. A final sample of 17 studies were identified for a systematic review. A total of eleven (five child-reported and six father-reported) father involvement scales were used in the studies. Guided by a heuristic contextual model of father involvement, secondary data from Waves 5 and 9 of the Fragile Families and Child Wellbeing Study were analyzed to assess the effects of father involvement (mother and father report of father involvement) at five years of age on children’s internalizing, externalizing, and delinquency behaviors and …

An Early Late Cretaceous Nodosaur From The Marine Eagle Ford Group Of North Central Texas, A Test Of The Endothermy In The Mosasaurs From The Late Cretaceous Of Angola, And The Ontogeny Of A New Pipid Frog From The Miocene Of Ethiopia, Matt Clemens

Earth Sciences Theses and Dissertations

The first two chapters of this dissertation detail the study of the newly recovered Holland Farm nodosaur (SMU 77100) from the Eagle Ford Group (95.29 ± 0.04 MA) of Mansfield in north central Texas. The objectives of this research are (1) to describe the anatomy of the Holland Farm nodosaur, (2) to determine its phylogenetic position within Ankylosauria, (3) to elaborate the substantial differences in body size and osteoderm morphology in armored dinosaurs occurring in north central Texas during the short duration of the Late Albian and Early Cenomanian, and (4) to provide a radiometric date for the lowermost member …

Optimal Control Methods For Chagas Disease, Francis Mastrome

Mathematics Theses - Archive

Chagas disease is the world's most neglected tropical disease. Having a lack of cure makes the primary focus on the disease preventing it and controlling it. This study takes into account three different control measures: bed nets, low-volume insecticide spraying, and improving housing conditions, analyzes their cost effectiveness compared to each other, and determines which combination of the three control measures prevents the most T. cruzi infections in a rural Latin American village over a decade. It was shown that there is a a hierarchical importance in the control measures when preventing the spread of Chagas disease. In order of …

Fusulinid And Conodont Biostratigraphy Of The Upper Pennsylvanian–Cisuralian Riepe Spring Limestone, Spruce Mountain Ridge, Elko County, Nevada, U.S.A., Michael Taylor Read

Earth & Environmental Sciences Dissertations - Archive

The Upper Pennsylvanian-Cisuralian (lower Permian) mixed carbonate-siliciclastic strata exposed at Spruce Mountain Ridge, Elko County, Nevada, record the shallow-marine microfauna and oscillating depositional history of the Ferguson Trough during the final glacial interval of the late Paleozoic ice age. The 420 m thick North Spruce Mountain Ridge (NSMR) section includes the uppermost part of the Ely Limestone, the Riepe Spring Limestone, and the base of the Rib Hill Formation. A discontinuous Pennsylvanian-Permian transition is preserved within the approximately 390 m thick Riepe Spring Limestone along the west side of Spruce Mountain Ridge, where an erosional disconformity separates upper Gzhelian (Upper …

Geochemical Evolution Of The Iron Ore Group -- A Mid-Archean Greenstone Belt Of The Eastern Indian Craton, Jordan Kent Wright

Earth & Environmental Sciences Theses - Archive

The Iron Ore Group (IOG) greenstone belt is located along the Eastern Indian Shield. It preserves a mid-Archean segment of Earth’s history, which consists of conformable sequences of lower basaltic-andesitic lava at the base (~2 km), followed successively upwards by lower-shales (2.3 km) gradating into a tuffacious horizon (30 m at the top), an extensive Algoma-type banded-iron formation (0.7 km), upper basaltic-andesitic lava and upper-shales (~3 km). This succession provides ideal investigative conditions considering each stratigraphic unit as only been lightly-metamorphosed to the low greenschist facies, lacks penetrative deformation, preserves pristine depositional characteristics and great antiquity (~3.4 Ga). The concentrations …

A Cmos Switched Capacitor Filter Based Potentiometric Readout Circuit For Chemfet Sensor, Revathy Perumalsamy

Electrical Engineering Theses - Archive

There are wide ranges of potentiometric sensors available for chemical sensing. The latest implementation of these sensors is CHEM resistors. In real time environment for an in-vivo application area, noise and power are the important factors. Though the selectivity of CHEM resistors improved with recent technological developments analog front end measurement circuits are always the limiting factor. Without compromising the performance parameters like gain and op-swing it is a challenge to improve the noise and power. Noise and power are the two factors which always require improvement. Also, there is trade-off between noise and power which needs to be balanced. …

Zgjerueshmëria E Infrastrukturës Përmes Metodave Të Virtualizimit Të Aplikacioneve Në Nivel Të Sistemit Operativ, Altin Ukshini

Theses and Dissertations

Zhvillimi dhe menaxhimi i aplikacioneve fleksibile dhe të zgjerueshme lehtë është një sfidë operacionale dhe e dizajnimit të infrastrukturës kur kemi të bëjmë me aplikacione dhe platforma të mëdha. Virtualizimi i aplikacioneve në nivel të Sistemit Operativ (konteinerizimi) ka bërë bujë në përdorim tek infrastrukturat dhe serverët në cloud, si dhe në mënyrën se si sot zhvillohen softuerët që të jenë të zgjerueshëm në aspekt të infrastrukturës dhe fleksibilitetit të zhvillimit. Në këtë punim shtjellohet veçmas për teknologjitë e ndryshme të konteinerizimit të aplikacioneve dhe për rëndësinë që ka sot kjo teknologji në zhvillimin e softuerit dhe dizajnimin e arkitekturave …

Krahasimi Në Mes Spring Boot Framework Dhe Jee Framework, Astrit Berisha

Theses and Dissertations

Në këtë punim ne do të bëjmë dallimin dhe ngjajshmerin në mes dy framework se cila prej këtyre dy framework mundëson zhvillimin e shpejtë të aplikacioneve, zvogëlon nevojën për programim si dhe sa janë të sigurta. Meqë përdorimi i këtyre dy framework është për zhvillimin e aplikacioneve, atëherë edhe përdorimi i tyre është po aq i rëndësishëm, të cilat na tregojn se çfarë lloj programesh mund ose duhet të ndërtohet dhe si do të ndërlidhen. Gjetjet janë të bazuara në një rishikim të historisë së të dy framework, dhe veçanërisht në atë se si kane ardhur deri te zhvillimi për …

Aplikimi I Internet Of Things Në Smart City, Genita Tahiri

Theses and Dissertations

Që kur u prezantua koncepti i një Smart City, Internet of Things është konsideruar infrastruktura kryesore në një smart city. Studimi aktual përshkruan rëndësinë e teknologjive IoT në teknologji udhërrëfyesi (TRM) të një smart city. Për më tepër, rreth 200 ekspertë hulumtojnë rëndësinë dhe thelbin e komponentëve të detajuar të teknologjive IoT për një smart city. Aplikacionet e reja të IoT janë duke bërë të mundur iniciativat e Smart City në të gjithë botën. Ai siguron aftësinë për të monitoruar, menaxhuar dhe kontrolluar pajisjet në distancë, dhe për të krijuar njohuri të reja dhe informacion të zbatueshëm nga rrjedhat masive …

Analizimi Dhe Implementimi I Kornizave Të Testimit Të Automatizuar Selenium Dhe Sahi, Kaltrina Baftiu

Theses and Dissertations

Testimi është bërë pjesë integrale e ciklit të zhvillimit të softuerit (SDLC). Përmes mjeteve të automatizuara të testimit me burim të hapur, kostoja e tërë procesit të testimit, si dhe koha që duhet për të kryer procesin e testimit, është zvogëluar ndjeshëm. Qëllimi kryesor i këtij materiali hulumtues është të analizojë mjetet e testimit të internetit Selenium dhe Sahi për të krahasuar karakteristikat e tyre dhe performancën në mënyrë që një përdorues i veçantë të mund të zgjedhë një mjet që është i përshtatshëm në aspektin e përdorshmërisë dhe karakteristikat e kërkuara për një detyrë specifike. Zgjedhja e një kornize …

Siguria E Të Dhënave Në Implementimet E Iot Në Sistemet Ehealth, Iliriana Shala

Theses and Dissertations

Në jetën tonë të sotme ne gjithmonë duhet të merremi me informacionin që luan një rol të rëndësishem në jetën tonë.Njëra nga burimet kryesore të informacionit është padyshim interneti.Gjërat që na rrethojnë po veprojnë me zgjuarsi dhe po e bëjnë jetën tonë njerëzore më të mençur.Këto gjëra veprojnë me zgjuarsi pasi janë të lidhura me internetin dhe kështu quhen “Internet of Things (IoT)”.Pajisjet e IoT mbledhin dhe i shpërndajnë informatat direkt me njëra tjetrën në cloud platforma, duke e bërë të mundur grumbullimin, ruajtjen dhe analizimin e të dhënave më shpejtë dhe më saktë.IoT ofron një premtim të madh në …

Villë Luksoze, Eglantina Buja

Theses and Dissertations

“Objekti përceptohet me sytë që shohin, me kokën që lëvizë, dhe me këmbët që ecin...” Ludwing Mies Van Der Rohe

Ndryshimet e vazhdueshme dhe konceptet e ripërtëritura të stilit të jetesës së njerëzve sjellin dhe krijojnë gjithnjë e më tepër nevoja për kualitetet e përgjithshme të banimit. Për më tepër kërkesat për vila dhe rezidenca kanë marshuar drejtë sferës së dimensionit psikologjik dhe kulturor. Si rrjedhojë edhe ka lindur një trend i ri dizajni dhe kërkesa të reja për qasjen ambientale, organizimin e kthinave, përzgjedhjen e materialeve dhe konceptin e dizajnit. Kjo qasje rezulton në krijimin e hapësirave më natyrale …

Umphlett Qci Dec 2018, Natalie A. Umphlett

High Plains Regional Climate Center: Staff Publications

Highlights for the Basin

Temperature and Precipitation Anomalies

Mountain Snowpack

Water Resources and Drought

Agriculture

Temperature

Precipitation

Eye Pressure Monitior, Andrea Nella Levy

Computer Engineering

The document describes a mobile application that takes information from an attached device which tests eye pressure. The device consists of an IOIO board connected to a custom device that measures the frequency of a given waveform. The device was designed by another student for their senior project, which I am taking over. This device is connected to an IOIO board which is a board designed by a Google employee which works with an android phone in order to create applications that work with embedded systems. The board comes with an API and connects to the phone via a micro-USB. …

Intrinsic Geometrical Constraints Of Spontaneously Excited Leidenfrost Drops, Jesse Edward Bergen

All Theses

A liquid drop placed on a heated surface above the Leidenfrost temperature will levitate on a vapor cushion. The static shape of these non-wetting Leidenfrost drops is that of a flattened sphere, reflecting the balance between gravitational, surface tension and lubrication pressures. In this thesis, we study Leidenfrost drops on curved substrates where we observe spontaneous star-shaped surface oscillations of characteristic frequency and mode number. Experiments are conducted using six different liquids and the temporal response of the observed modes n = 2 – 13 is analyzed to dene the oscillation spectrum. We observe that large drops oscillate with a …

Exploration Of Post-Secondary Preparation In Urban, Suburban, And Rural High Schools In The State Of Missouri, Rashida J. Mckinley

Dissertations

The purpose of this study was to analyze how high schools in the state of Missouri’s rural, suburban, and urban areas were preparing students for post-secondary education and career readiness. The researcher analyzed the state of Missouri secondary data gathered from the 2013 through 2017 school years, in urban, suburban, and rural high schools. The researcher also surveyed school guidance counselors and administrators. The data represented consisted of ACT Composite Scores, Annual Performance Reports, Post-Secondary Placements, Career and Technical Education Placements, Dropout Rates, and Graduation Rates. This examination utilized a mixed method study to gain an understanding of each school’s …

Essays On The Factors That Contribute To Body Mass Index, Veronica Salinas

Economics ETDs

Using diet, exercise, consumer behavior, and demographic data from the National Health and Nutrition Examination Survey (NHANES), I examine the factors that contribute to body mass index (BMI) for the adult working age population. In Chapters 2 and 3, I examine how female BMI varies by race and ethnicity. In Chapter 4, I study the effect of food deserts on BMI and obesity for both males and females.

In Chapter 2, I use Bayesian Model Averaging (BMA) to examine the factors that influence female BMI for the adult working age population. Results indicate 12 of the 40 covariates are strongly …

Diamond Intracrystalline Stable Isotope Chemical Image Analysis By Time-Of-Flight Secondary Ionization Mass Spectrometery, Tyler J. Sundell

Graduate Theses/Dissertations

The chemical resistance of diamond allows in-situ study of the diamond source regions. For a majority of gem quality diamonds, this source region is the sublithospheric mantle keel of a cratonic nuclei. Through analysis of stable isotopes, radiogenic isotopes and trace elements, diamond geochemical analyses can define chemical fluxes in the mantle keel. However, such studies require multiple methodologies for each chemical suite, high spatial resolution and analytical precision. Here, I evaluate Time-of-Flight Secondary Ionization Mass Spectrometer (ToF-SIMS) as an alternative method for diamond geochemical analyses. ToF-SIMS analysis can perform in cation and anion mode to measure the entire periodic …

Educational Leadership Newsletter December 2018, Educational Leadership Department, University Of Southern Maine

Educational Leadership Newsletters

Inside this issue:

• Letter from the Chair
• Southern Maine Partnership Update
• Assessment for Learning and Leading Conference
• Update on the Professional Educator Master's Degree
• Thinking About Internship in 2019-2020?
• Spring 2019 Schedule