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2016

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Geospatial Analysis Of Food Environment Demonstrates Associations With Gestational Diabetes, Mk Kahr, Ma Suter, J Ballas, Sm Monga, W Lee, M Hu, Cd Shope, A Chesnokova, L Krannich, En Griffin, J Mastrobattista, Ga Dildy, Sl Strehlow, R Ramphul, Et Al. Jan 2016

Geospatial Analysis Of Food Environment Demonstrates Associations With Gestational Diabetes, Mk Kahr, Ma Suter, J Ballas, Sm Monga, W Lee, M Hu, Cd Shope, A Chesnokova, L Krannich, En Griffin, J Mastrobattista, Ga Dildy, Sl Strehlow, R Ramphul, Et Al.

Faculty, Staff and Students Publications

BACKGROUND: Gestational diabetes mellitus (GDM) is one of most common complications of pregnancy, with incidence rates varying by maternal age, race/ethnicity, obesity, parity, and family history. Given its increasing prevalence in recent decades, covariant environmental and sociodemographic factors may be additional determinants of GDM occurrence. OBJECTIVE: We hypothesized that environmental risk factors, in particular measures of the food environment, may be a diabetes contributor. We employed geospatial modeling in a populous US county to characterize the association of the relative availability of fast food restaurants and supermarkets to GDM. STUDY DESIGN: Utilizing a perinatal database with >4900 encoded antenatal and …


Molecular Simulation Study Of Oil Hydrocarbons, Dispersants And Other Organics In Atmospheric Air/Water Interfaces, Zenghui Zhang Jan 2016

Molecular Simulation Study Of Oil Hydrocarbons, Dispersants And Other Organics In Atmospheric Air/Water Interfaces, Zenghui Zhang

LSU Doctoral Dissertations

The main objective of this dissertation is to study the interfacial properties of organic contaminants, in particular green leaf volatiles (GLVs), oil hydrocarbons [mainly intermediate-volatile organic compounds (IVOCs) and semi-volatile organic compounds (SVOCs)], as well as surfactant species (i.e. DOSS and Span 80) from Corexit dispersants at atmospheric air/water and air/seawater interfaces. All these compounds can significantly contribute to the formation of secondary organic aerosols (SOAs). Furthermore, our simulation work on IVOCs, SVOCs and Corexit surfactants, combining with experiments from the Valsaraj group, suggests that these compounds can be adsorbed on the surface of seawater droplets and aerosolized into the …


Impacts Of Rock-Brine Interactions On Petrophysical Properties Of A Sandstone Reservoir, Utilizing Geochemical And Pore Network Modeling, Masoud Safari-Zanjani Jan 2016

Impacts Of Rock-Brine Interactions On Petrophysical Properties Of A Sandstone Reservoir, Utilizing Geochemical And Pore Network Modeling, Masoud Safari-Zanjani

LSU Doctoral Dissertations

Unfavorable consequences of geochemical reactions, such as calcite and silica scaling, in geothermal power plant surface facilities have been discussed in many recent studies. However, the impact of brine-rock interactions related to geothermal projects on reservoir properties has not been addressed fully. In this study, interactions between geothermal fluid and reservoir rocks in two fields located in Vermilion Parish, LA, and Chocolate Bayou, TX, are examined using geochemical modeling. The studied reservoir belongs to the Frio formation. In the geochemical models, the brine is cooled down to the estimated output temperature of a geothermal heat exchanger and re-equilibrated. Then, brine-rock …


Cluster Algebras And Maximal Green Sequences For Closed Surfaces, Eric Bucher Jan 2016

Cluster Algebras And Maximal Green Sequences For Closed Surfaces, Eric Bucher

LSU Doctoral Dissertations

Given a marked surface (S,M) we can add arcs to the surface to create a triangulation, T, of that surface. For each triangulation, T, we can associate a cluster algebra. In this paper we will consider orientable surfaces of genus n with two interior marked points and no boundary component. We will construct a specific triangulation of this surface which yields a quiver. Then in the sense of work by Keller we will produce a maximal green sequence for this quiver. Since all finite mutation type cluster algebras can be associated to a surface, with some rare exceptions, this work …


Feedback Control Theory In Stochastic Dynamical Systems, Ashkan Balouchi Jan 2016

Feedback Control Theory In Stochastic Dynamical Systems, Ashkan Balouchi

LSU Doctoral Dissertations

A stochastic dynamical system is a system composed of many interacting components which includes stochastic behavior. Feedback control theory is designed to use information from the current state of the system in order to temper the final state toward the desired outcome. In this dissertation, I perform studies on two choices of classic and quantum dynamical systems to cover vast variety of statistical tools and methods. For classical model, I perform a study on finite-size effects at the phase transition in the Nagel-Schreckenberg traffic model as an example of non-equilibrium many body stochastic dynamical system. For quantum mechanical model, I …


Exploring The Relationship Between Long-Term Memory And Attention Through Attentional Templates, Rebecca Rose Goldstein Jan 2016

Exploring The Relationship Between Long-Term Memory And Attention Through Attentional Templates, Rebecca Rose Goldstein

LSU Doctoral Dissertations

It is assumed that the contents of visual working memory (VWM) guide attention. This notion has been challenged by work which has demonstrated that multiple searches for the same target changes contralateral delay activity (CDA), an event-related potential that is the putative marker of the amount of information maintained in VWM. It has been suggested that the disappearance of the CDA with an invariable target marks the transfer of the attentional template from VWM storage to long-term memory (LTM) storage. Therefore, LTM may guide attention in many situations where it has previously been assumed that VWM guides attention. However, while …


Essays In Corporate Equity Transactions, James David Kelly Jan 2016

Essays In Corporate Equity Transactions, James David Kelly

LSU Doctoral Dissertations

This dissertation presents two essays dealing with corporate equity transactions. The first essay concerns an equity issuing transaction, the initial public offering (IPO), and specifically lockups, which restrict sales by pre-IPO shareholders. We improve upon the methodology for testing theory related to lockup length through the use of a multinomial logit as well as explore the reasons for and implications of multiple lockup agreements. We find that multiple lockups are associated with dual class equity structures, high book-to-market values, and more secondary shares offered. Offerings that include multiple lockups are more likely to deviate in (weighted average) length from the …


The Representation Of Disability In The Music Of Alfred Hitchcock Films, John T. Dunn Jan 2016

The Representation Of Disability In The Music Of Alfred Hitchcock Films, John T. Dunn

LSU Doctoral Dissertations

Several of Alfred Hitchcock’s movies feature characters with disabilities. Often, these characters are protagonists, and Hitchcock systematically manipulates his audiences to identify with these characters through the editing process, sound effects, and music. This dissertation will analyze the ways music represents various disabilities in three Hitchcock films. Vertigo (1958) addresses obsession and phobia as its main themes, whereas Psycho (1960) investigates obsession and madness. Finally, The Man Who Knew Too Much (1956) explores muteness, hysteria, and identity in the context of two pieces of diegetic music. Hitchcock made careful notes for the music in his films; songs represent disability through …


Design And Implementation Of Qcm Virtual Sensing Schemes For Analyses Of Volatile Organic Compounds, Nicholas Colby Speller Jan 2016

Design And Implementation Of Qcm Virtual Sensing Schemes For Analyses Of Volatile Organic Compounds, Nicholas Colby Speller

LSU Doctoral Dissertations

Sensor arrays have evolved as powerful approaches for providing detection and discrimination of volatile organic compounds (VOCs) as required across numerous analytical applications. Such systems typically comprise a number of cross reactive sensor elements, which generate analyte specific response patterns upon exposure to VOCs, and are known as multisensor arrays. When evaluated using statistical methods, these response patterns facilitate classification of VOCs. As an alternative, a single dynamically operated sensor could also be used to generate analyte specific response patterns. This approach is known as a virtual sensor array (VSA) and can exhibit significant advantages when compared to MSAs. Some …


Relay Selection Strategies For Multi-Hop Cooperative Networks, Hui Sun Jan 2016

Relay Selection Strategies For Multi-Hop Cooperative Networks, Hui Sun

LSU Doctoral Dissertations

In this dissertation we consider several relay selection strategies for multi-hop cooperative networks. The relay selection strategies we propose do not require a central controller (CC). Instead, the relay selection is on a hop-by-hop basis. As such, these strategies can be implemented in a distributed manner. Therefore, increasing the number of hops in the network would not increase the complexity or time consumed for the relay selection procedure of each hop. We first investigate the performance of a hop-by-hop relay selection strategy for multi-hop decode-and-forward (DF) cooperative networks. In each relay cluster, relays that successfully receive and decode the message …


“Þe Inglis In Seruage”: Textual Englishness, 1175 – 1330, Joseph Richard Wingenbach Jan 2016

“Þe Inglis In Seruage”: Textual Englishness, 1175 – 1330, Joseph Richard Wingenbach

LSU Doctoral Dissertations

For some time, scholars who study English identity formation in the literature produced between the Norman Conquest and the Hundred Years War have addressed the manifold ways English writers imagined and reconstructed the Anglo-Saxon past as a golden era free of the taint of foreign domination. I find the cultural memory of pre-Conquest England to be only a fraction of what constituted literary Englishness, and my research calls for a more nuanced description of English literary identity during the period in question. The hybrid critical approach I employ is a blend of historicist and structural linguistic methodologies that takes both …


Ben Moore's "Dear Theo," For Tenor Voice And Piano: A Performer's Guide, Gregory Michael Gallagher Jan 2016

Ben Moore's "Dear Theo," For Tenor Voice And Piano: A Performer's Guide, Gregory Michael Gallagher

LSU Doctoral Dissertations

American composer Ben Moore (b. 1960) is a well-regarded painter, pianist, and composer whose compositions have been sung by leading singers of the Metropolitan Opera. This document serves as a performer’s guide to Moore’s song cycle Dear Theo. The song cycle utilizes Moore’s own text adaptations of letters written by Vincent van Gogh to his brother Theo. Chapter 1 presents a biographical sketch of Vincent van Gogh and his path to becoming a painter. Chapter 2 provides a brief life history of Ben Moore based on personal interview. Chapter 3 details the process of creating the song cycle Dear Theo. …


A Flipped Classroom Redesign In General Chemistry, Scott A. Reid Jan 2016

A Flipped Classroom Redesign In General Chemistry, Scott A. Reid

Chemistry Faculty Research and Publications

The flipped classroom continues to attract significant attention in higher education. Building upon our recent parallel controlled study of the flipped classroom in a second-term general chemistry course (J. Chem. Educ., 2016, 93, 13–23), here we report on a redesign of the flipped course aimed at scaling up total enrollment while keeping discussion sizes small (i.e.,students), and maintaining equivalent contact hour load for faculty and workload for students. To that end, the course format featured lecture contact pushed outside of the classroom in the form of video lectures (mean duration 13 minutes) paired with online …


Hydrogen-Atom Attack On Phenol And Toluene Is Ortho-Directed, Olha Krechkivska, Callan M. Wilcox, Tyler P. Troy, Klaas Nauta, Bun Chan, Rebecca Jacob, Scott A. Reid, Leo Radom, Timothy W. Schmidt, Scott H. Kable Jan 2016

Hydrogen-Atom Attack On Phenol And Toluene Is Ortho-Directed, Olha Krechkivska, Callan M. Wilcox, Tyler P. Troy, Klaas Nauta, Bun Chan, Rebecca Jacob, Scott A. Reid, Leo Radom, Timothy W. Schmidt, Scott H. Kable

Chemistry Faculty Research and Publications

The reaction of H + phenol and H/D + toluene has been studied in a supersonic expansion after electric discharge. The (1 + 1′) resonance-enhanced multiphoton ionization (REMPI) spectra of the reaction products, at m/z = parent + 1, or parent + 2 amu, were measured by scanning the first (resonance) laser. The resulting spectra are highly structured. Ionization energies were measured by scanning the second (ionization) laser, while the first laser was tuned to a specific transition. Theoretical calculations, benchmarked to the well-studied H + benzene → cyclohexadienyl radical reaction, were performed. The spectrum arising from the …


The Relative Importance Of Tree And Stand Properties In Susceptibility To Spruce Beetle Outbreak In The Mid-20th Century, Felicia Bakaj, Nathan Mietkiewicz, Thomas T. Veblen, Dominik Kulakowski Jan 2016

The Relative Importance Of Tree And Stand Properties In Susceptibility To Spruce Beetle Outbreak In The Mid-20th Century, Felicia Bakaj, Nathan Mietkiewicz, Thomas T. Veblen, Dominik Kulakowski

Geography

Tree susceptibility to potentially lethal agents is determined not only by attributes of individual trees, but also by neighborhood effects at a range of scales. For example, effects of disturbances on individual trees are often contingent on the size, configuration, and other properties of neighboring trees. Wildfires can modify postfire properties of individual trees as well as of entire forest stands, both of which can affect subsequent ecological processes, including subsequent disturbances. In recent years, much has been learned about how disturbances interact, but numerous questions concerning underlying mechanisms remain unresolved. For example, the relative importance of forest properties at …


Fire Severity Controlled Susceptibility To A 1940s Spruce Beetle Outbreak In Colorado, Usa, Dominik Kulakowski, Thomas T. Veblen, Peter Beb Jan 2016

Fire Severity Controlled Susceptibility To A 1940s Spruce Beetle Outbreak In Colorado, Usa, Dominik Kulakowski, Thomas T. Veblen, Peter Beb

Geography

The frequency, magnitude, and size of forest disturbances are increasing globally. Much recent research has focused on how the occurrence of one disturbance may affect susceptibility to subsequent disturbances. While much has been learned about such linked disturbances, the strength of the interactions is likely to be contingent on the severity of disturbances as well as climatic conditions, both of which can affect disturbance intensity and tree resistance to disturbances. Subalpine forests in western Colorado were affected by extensive and severe wildfires in the late 19th century and an extensive and severe outbreak of spruce beetle (Dendroctonus rufipennis) in the …


The Influence Of Enrollment In Career And Technical Education Courses On The Achievement Of High School Special Education Students, Melinda Simoneaux Partin Jan 2016

The Influence Of Enrollment In Career And Technical Education Courses On The Achievement Of High School Special Education Students, Melinda Simoneaux Partin

LSU Doctoral Dissertations

This dissertation joins a conversation in the special education arena about the academic and vocational agenda for special education high school students. It explores the influence of enrollment in Career Technical Education (CTE) courses on the achievement of high school special education (SPED) students. The purpose of this study was to compare the achievement of special education (SPED) students enrolled in Career Technical Education (CTE) courses with special education (SPED) students who were not enrolled in Career Technical Education (CTE) courses. The study was designed to determine whether or not SPED students enrolled in CTE improved on the academic scores …


Wrestling With Neptune: The Political Consequences Of The Military Inundations During The Dutch Revolt, Robert Tiegs Jan 2016

Wrestling With Neptune: The Political Consequences Of The Military Inundations During The Dutch Revolt, Robert Tiegs

LSU Doctoral Dissertations

Over the course of several centuries during the High and Late Middle Ages the people of Holland developed a vast water-management infrastructure to protect themselves against flooding. Enormous sections of the province lay at or below sea-level, so it was only through constant diligence that they kept their lands dry. They found that the best way to maintain these flood defenses was through cooperation and consensus forming at the local and regional level. Those who would be affected an inundation were given a chance to participate in the decision-making process about how to prevent floods from occurring. These environmental influences …


Application Of Biomass Derived Materials In Nanocomposites And Drilling Fluids, Kunlin Song Jan 2016

Application Of Biomass Derived Materials In Nanocomposites And Drilling Fluids, Kunlin Song

LSU Doctoral Dissertations

Tar is inevitably produced from biomass thermochemical processes, and is often disposed as an industrial waste, leading to environmental pollution. As a result of its high carbon content, tar was expected to be a promising precursor for manufacturing carbon materials. Consequently, low-cost porous carbon nanofibers (CNFs) using tar, polyacrylonitrile (PAN), and silver nanoparticles was fabricated through electrospinning and subsequent stabilization and carbonization processes. The continuous electrospun nanofibers were obtained with diameters ranging from 392 to 903 nm. The addition of biomass tar resulted in increased fiber diameters, reduced thermal stabilities, and slowed cyclization reactions of PAN in the as-spun nanofibers. …


Decadal Bering Sea Seascape Change: Consequences For Pacific Walruses And Indigenous Hunters, G. Carleton Ray, Gary L. Hufford, James E. Overland, Igor Krupnik, Jerry Mccormick-Ray, Karen Frey, Elizabeth Labunski Jan 2016

Decadal Bering Sea Seascape Change: Consequences For Pacific Walruses And Indigenous Hunters, G. Carleton Ray, Gary L. Hufford, James E. Overland, Igor Krupnik, Jerry Mccormick-Ray, Karen Frey, Elizabeth Labunski

Geography

The most signifi cant factors currently affecting the Pacifi c walrus (Odobenus rosmarus divergens) population are climate change and consequent changes in sea-ice morphology and dynamics. This paper integrates recent physical sea-ice change in the Bering Sea with biological and ecological conditions of walruses in their winter-spring reproductive habitat. Historically, walrus in winter-spring depended on a critical mass of sea-ice habitat to optimize social networking, reproductive fi tness, feeding behavior, migration, and energetic effi ciency. During 2003-2013, our cross-disciplinary, multiscale analysis from shipboard observations, satellite imagery, and ice-fl oe tracking, reinforced by information from indigenous subsistence hunters, documented change of …


Direct Measurements Of Nuclear Reactions In Hot Stellar Environments, Kevin Thomas Macon Jan 2016

Direct Measurements Of Nuclear Reactions In Hot Stellar Environments, Kevin Thomas Macon

LSU Doctoral Dissertations

Understanding the origins of intermediate mass nuclei requires accurate knowledge of nuclear reaction rates. This thesis addresses two projects targeting measurements of nuclear cross sections relevant in hot astrophysical environments. Direct measurements of neutron capture on 67Zn and 68Zn were performed using the Detector for Advanced Neutron Capture Experiments (DANCE) at the Los Alamos Neutron Science Center (LANSCE). A new 68Zn(n,&gamma) cross section in the neutron energy range from 150 eV to 850 keV and Maxwellian-Averaged Cross Sections from 20 keV-100 keV are presented along with the details of the analysis. These reaction rates are important for …


The Contribution Of Self-Regulation To Reading Comprehension In Adolescent Learners, Rebecca Lynn Parker Jan 2016

The Contribution Of Self-Regulation To Reading Comprehension In Adolescent Learners, Rebecca Lynn Parker

LSU Doctoral Dissertations

The purpose of this study was to examine the dually implicated processes of language and self-regulation in reading comprehension and to determine if self-regulation contributes unique variance to reading comprehension beyond word recognition/decoding and oral language comprehension. The study also sought to determine if the unique contribution of self-regulation to reading comprehension differs for students with language/learning difficulties and students with typical language/learning histories. Thirty-two 6th, 7th, and 8th graders participated in this study. Of these participants, 17 students had language/learning difficulties and 15 students had typical language/learning histories. All participants attended a low performing public middle school located in …


Vegetation Influences Microbial Community Structure And Methane Emissions In Southeastern Louisiana Wetlands, Anthony Jason Rietl Jan 2016

Vegetation Influences Microbial Community Structure And Methane Emissions In Southeastern Louisiana Wetlands, Anthony Jason Rietl

LSU Doctoral Dissertations

Methane has a warming potential 28 times that of carbon dioxide and has been increasing in the Earth’s atmosphere since 1750. An understanding of the dynamics of methane emissions from natural sources is becoming increasingly important as we may need to mitigate emissions from these sources in the future to help reduce the effects of climate change. Wetlands are the single largest natural source of methane; however, little attention has been given to how plant species, biota, and interactions between above and belowground communities and microbial communities may affect methane emissions. First, microbial community structure and function was assessed for …


Geologic Extremes Of The Nw Himalaya: Investigations Of The Himalayan Ultra-High Pressure And Low Temperature Deformation Histories, Dennis Girard Donaldson Jan 2016

Geologic Extremes Of The Nw Himalaya: Investigations Of The Himalayan Ultra-High Pressure And Low Temperature Deformation Histories, Dennis Girard Donaldson

LSU Doctoral Dissertations

This dissertation focuses on two extremes of orogenic development in the Himalaya: the timing of early ultra-high pressure related tectonics and the subsequent emplacement of the high grade Greater Himalayan Crystallines. The Himalayan orogeny is one of if not the best example of ongoing collisional systems, marked by the ongoing convergence of the Indian and Asian continents. The presence of coesite in the Tso Morari complex respresents subduction of the Indian continental crust to ultrahigh-pressure (UHP) conditions. However, the timing of UHP metamorphism is debated, creating an uncertainty in the calculation of subduction and exhumation rates. Petrologic and geochronologic analyses …


21st Century Transformational Leadership: The Neo-Stereotypical Phenomenon Of A Black Female Principal, Terri Valentine Wallis Jan 2016

21st Century Transformational Leadership: The Neo-Stereotypical Phenomenon Of A Black Female Principal, Terri Valentine Wallis

LSU Doctoral Dissertations

The purpose of this study was to examine the leadership perceptions of a Black female first year principal in a predominantly White private Christian school. For years, educational research and leadership models for school principals were theorized and constructed based on White men or those in the dominant group. This study is significant in that it sought to explore the perception of the leadership behaviors and dispositions of a Black female to determine if there was a correlation between the Transformational Leadership Theory and the emergent leadership style. In the qualitative tradition, this autoethnographic study used narrative inquiry to explore …


Design And Analysis Of Geothermal Wellbore Energy Conversion System Working On Zero Mass Withdrawal Principle, Ildar Akhmadullin Jan 2016

Design And Analysis Of Geothermal Wellbore Energy Conversion System Working On Zero Mass Withdrawal Principle, Ildar Akhmadullin

LSU Doctoral Dissertations

This project is sponsored by the Department of Energy of the United States and dedicated to development of electricity production from the low-enthalpy geothermal reservoirs. The prime interest are reservoirs that are characterized by low temperature of heat source located in deep saline aquifers with high permeable rock. Usually energy production from these resources are not economical by using a conventional binary power plant approach. The presented PhD work is a study of a new system that utilizes a single-well technology and working on supercritical power cycle (PC). The wellbore energy conversion system is operating with Zero Mass Withdrawal (ZMW) …


The Certifying Triangle Of Financial Reports, Dong Li Jan 2016

The Certifying Triangle Of Financial Reports, Dong Li

LSU Doctoral Dissertations

This research provides theoretical, regulatory, and empirical underpinnings that financial reports are the joint representation of the certifying triangle (i.e., CEO-CFO-Auditor). This research also finds that replacement of the CEO tends to reduce the survival rate of the CFO with the firm, and vice versa; replacement of the CFO reduces the survival rate of the auditor, and vice versa. However, an association does not exist between the survival rate of the CEO and the auditor. Moreover, while a single realignment of the certifying triangle does not reduce the year-end ERC, a double (CEO-CFO) realignment significantly decreases the ERC. This negative …


The Accuracy Of Dietary Recall Of Infant Feeding And Food Allergen Data, Zyl Z Van, K. Maslin, T. Dean, R. Blaauw, C. Venter Jan 2016

The Accuracy Of Dietary Recall Of Infant Feeding And Food Allergen Data, Zyl Z Van, K. Maslin, T. Dean, R. Blaauw, C. Venter

School of Nursing and Midwifery

AbstractBackgroundResearch investigating the association of infant dietary factors with later health outcomes often relies on maternal recall. It is unclear what the effect of recall bias is on the accuracy of the information obtained. The present study aimed to determine the extent of recall bias on the accuracy of infant feeding and food allergen data collected 10 years later.MethodsMothers were recruited from a prospective birth cohort from the Isle of Wight. When their child was 10 years of age (2011/2012), mothers were requested to complete a retrospective infant feeding questionnaire asking the same questions as those solicited in 2001/2002.ResultsIn total, …


Empowering English Language Teachers Through History, Eun-Young Julia Kim Jan 2016

Empowering English Language Teachers Through History, Eun-Young Julia Kim

Faculty Publications

TESOL training programs typically offer courses in methods and pedagogy, along with other classes to equip future English language teaching (ELT) professionals with essential teaching skills and knowledge. Not as frequently offered or required, however, is a course focusing on critically examining political and philosophical aspects of ELT. This article discusses why I believe it is important for TESOL curriculums to include topics on the diachronic development and synchronic variations of the English language and to engage students in topics that would allow them to critically examine embedded power relations in ELT. By reflecting on my own classroom experience as …


Creating A Link Between The Past And The Public : The Goals And Roles Of Public Archaeology, Dana Janette Mcveigh Jan 2016

Creating A Link Between The Past And The Public : The Goals And Roles Of Public Archaeology, Dana Janette Mcveigh

Undergraduate Theses and Senior Projects

No abstract provided.