Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Computer Sciences (1861)
- Environmental Sciences (1638)
- Physics (1101)
- Life Sciences (1066)
- Chemistry (1064)
-
- Engineering (985)
- Social and Behavioral Sciences (923)
- Mathematics (806)
- Earth Sciences (758)
- Statistics and Probability (522)
- Oceanography and Atmospheric Sciences and Meteorology (463)
- Computer Engineering (394)
- Astrophysics and Astronomy (341)
- Natural Resources and Conservation (330)
- Electrical and Computer Engineering (306)
- Applied Mathematics (279)
- Sustainability (278)
- Databases and Information Systems (276)
- Natural Resources Management and Policy (276)
- Education (249)
- Medicine and Health Sciences (228)
- Geology (219)
- Water Resource Management (196)
- Business (190)
- Arts and Humanities (180)
- Ecology and Evolutionary Biology (174)
- Environmental Monitoring (173)
- Oil, Gas, and Energy (157)
- Law (156)
- Institution
-
- Selected Works (664)
- University of Nebraska - Lincoln (624)
- University of Wollongong (450)
- TÜBİTAK (273)
- University of Nevada, Las Vegas (272)
-
- Wright State University (259)
- Singapore Management University (230)
- Clemson University (210)
- SelectedWorks (200)
- Missouri University of Science and Technology (184)
- Louisiana State University (176)
- Utah State University (163)
- California Polytechnic State University, San Luis Obispo (154)
- Portland State University (139)
- Wayne State University (126)
- Old Dominion University (123)
- University of South Florida (120)
- Technological University Dublin (116)
- University of Kentucky (101)
- Edith Cowan University (100)
- Brigham Young University (93)
- University of Tennessee, Knoxville (93)
- Air Force Institute of Technology (92)
- William & Mary (92)
- Virginia Commonwealth University (88)
- Embry-Riddle Aeronautical University (81)
- Thomas Jefferson University (81)
- Syracuse University (80)
- Chinese Chemical Society | Xiamen University (79)
- Marquette University (78)
- Keyword
-
- CMMB (67)
- College for Professional Studies (58)
- School of Computer & Information Science (57)
- Humans (53)
- Female (47)
-
- Climate change (46)
- Male (44)
- Aged (43)
- Middle Aged (40)
- Sustainability (39)
- Myocardial Infarction (38)
- Water quality (36)
- GeoQUEST (31)
- Security (31)
- Chemistry (29)
- Mathematics (28)
- GIS (27)
- Research (27)
- Privacy (26)
- Simulation (26)
- Statistics (26)
- Massachusetts (25)
- Water (25)
- RFID (24)
- Colorado (23)
- Conservation (23)
- Energy (23)
- Environmental studies (23)
- Management (23)
- Australia (22)
- Publication
-
- Research Collection School Of Computing and Information Systems (220)
- Theses and Dissertations (216)
- Faculty of Informatics - Papers (Archive) (204)
- Faculty of Science - Papers (Archive) (191)
- Computer Science & Engineering Syllabi (139)
-
- Faculty Publications (119)
- Electronic Theses and Dissertations (103)
- S.C. Water Resources Conference (93)
- Turkish Journal of Chemistry (92)
- Sci-Tech News (80)
- Dissertations (79)
- Journal of Electrochemistry (79)
- Turkish Journal of Electrical Engineering and Computer Sciences (75)
- LSU Master's Theses (72)
- UNLV Theses, Dissertations, Professional Papers, and Capstones (72)
- Articles (71)
- Masters Theses (67)
- United States Department of Agriculture Wildlife Services: Staff Publications (66)
- Open Access Theses & Dissertations (65)
- Doctoral Dissertations (64)
- Associate Professor Edward D Burton (63)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (60)
- Applications and Applied Mathematics: An International Journal (AAM) (59)
- LSU Doctoral Dissertations (59)
- Journal of Modern Applied Statistical Methods (58)
- Physics - All Scholarship (58)
- Regis University Student Publications (comprehensive collection) (58)
- Physics (57)
- Physics Faculty Publications (55)
- Physics Faculty Research & Creative Works (55)
- Publication Type
Articles 7111 - 7140 of 8620
Full-Text Articles in Physical Sciences and Mathematics
On The Casimir Interaction Between Holes In A Plate, Daniel N. Kabat, Dimitra Karabali, V P. Nair
On The Casimir Interaction Between Holes In A Plate, Daniel N. Kabat, Dimitra Karabali, V P. Nair
Publications and Research
We study the leading long-distance attractive force between two holes in a plate arising from a scalar eld with Dirichlet boundary conditions on the plate. We use a formalism in which the interaction is governed by a non-local eld theory which lives on the two holes. The interaction energy is proportional to Q1Q2=r7 at large separation r, where Q1 and Q2 are certain charges associated with the holes. We compute these charges for round and rectangular holes. We show that the 1=r7 behavior is universal for separations large compared to the linear dimensions of the holes, irrespective of the spin …
The Hamiltonian Approach To Yang-Mills (2 + 1): Expansion Scheme And Corrections To String Tension, Dimitra Karabali, V P. Nair, Alexandr Yelinkov
The Hamiltonian Approach To Yang-Mills (2 + 1): Expansion Scheme And Corrections To String Tension, Dimitra Karabali, V P. Nair, Alexandr Yelinkov
Publications and Research
We carry out further analysis of the Hamiltonian approach to Yang-Mills theory in 2+1 dimensions which helps to place the calculation of the vacuum wave function and the string tension in the context of a systematic expansion scheme. The solution of the Schrodinger equation is carried out recursively. The computation of correlators is re-expressed in terms of a two-dimensional chiral boson theory. The effective action for this theory is calculated to first order in our expansion scheme and to the fourth order in a kinematic expansion parameter. The resulting corrections to the string tension are shown to be very small, …
Solid Phase Extraction Of Copper, Nickel, And Cobalt In Water Samples After Extraction Using Surfactant Coated Alumina Modified With Indane-1,2,3-Trione 1,2-Dioxime And Determination By Flame Atomic Absorption Spectrometry, Mahdi Hosseini, Nasser Dalali, Ali Karimi, Kourosh Dastanra
Solid Phase Extraction Of Copper, Nickel, And Cobalt In Water Samples After Extraction Using Surfactant Coated Alumina Modified With Indane-1,2,3-Trione 1,2-Dioxime And Determination By Flame Atomic Absorption Spectrometry, Mahdi Hosseini, Nasser Dalali, Ali Karimi, Kourosh Dastanra
Turkish Journal of Chemistry
A simple method for simultaneous pre-concentration of Cu, Ni, and Co metal ions prior to their determination by flame atomic absorption spectrometry is reported. The method is based on the extraction of target ions via complexation with indane-1,2,3-trione 1,2-dioxime immobilized on sodium dodecyl sulfate (SDS) coated alumina. The metal content on the adsorbent was eluted with 4.5 mL of 2 mol L^{-1} nitric acid. The influences of the analytical parameters including pH, sample volume and flow rate, and eluent type and flow rate were investigated. The effect of matrix ions on the retentions of the analytes was also examined. The …
2-D Path Planning For Direct Laser Deposition Process, Swathi Routhu
2-D Path Planning For Direct Laser Deposition Process, Swathi Routhu
Masters Theses
"The zigzag and offset path have been the two most popular path patterns for tool movement in machining process. Different from the traditional machining processes, the quality of parts produced by the metal deposition process is much more dependent upon the choice of deposition paths. Due to the nature of the metal deposition processes, various tool path patterns not only change the efficiency but also affect the deposition height, a critical quality for metal deposition process. This thesis presents the research conducted on calculating zigzag pattern to improve efficiency by minimizing the idle path. The deposition height is highly dependent …
Closed-Form Solutions To Discrete-Time Portfolio Optimization Problems, Mathias Christian Goeggel
Closed-Form Solutions To Discrete-Time Portfolio Optimization Problems, Mathias Christian Goeggel
Masters Theses
"In this work, we study some discrete time portfolio optimization problems. After a brief introduction of the corresponding continuous time models, we introduce the discrete time financial market model. The change in asset prices is modeled in contrast to the continuous time market by stochastic difference equations. We provide solutions for these stochastic difference equations. Then we introduce the discrete time risk-measure and the portfolio optimization problems. We provide closed form solutions to the discrete time problems. The main contribution of this thesis are the closed form solutions to the discrete time portfolio models. For simulation purposes the discrete time …
An Artificial Life Approach To Evolutionary Computation: From Mobile Cellular Algorithms To Artificial Ecosystems, Shivakar Vulli
An Artificial Life Approach To Evolutionary Computation: From Mobile Cellular Algorithms To Artificial Ecosystems, Shivakar Vulli
Masters Theses
"This thesis presents a new class of evolutionary algorithms called mobile cellular evolutionary algorithms (mcEAs). These algorithms are characterized by individuals moving around on a spatial population structure. As a primary objective, this thesis aims to show that by controlling the population density and mobility in mcEAs, it is possible to achieve much better control over the rate of convergence than what is already possible in existing cellular EAs. Using the observations and results from this investigation into selection pressure in mcEAs, a general architecture for developing agent-based evolutionary algorithms called Artificial Ecosystems (AES) is presented. A simple agent-based EA …
Minimize End-To-End Delay Through Cross-Layer Optimization In Multi-Hop Wireless Sensor Networks, Yibo Xu
Minimize End-To-End Delay Through Cross-Layer Optimization In Multi-Hop Wireless Sensor Networks, Yibo Xu
Masters Theses
"End-to-end delay plays a very important role in wireless sensor networks. It refers to the total time taken for a single packet to be transmitted across a network from source to destination. There are many factors could affect the end-to-end delay, among them the routing path and the interference level along the path are the two basic elements that could have significant influence on the result of the end-to-end delay. This thesis presents a transmission scheduling scheme that minimizes the end-to-end delay when the node topology is given. The transmission scheduling scheme is designed based on integer linear programming and …
Multi Axis Slicing For Rapid Prototyping, Divya Kanakanala
Multi Axis Slicing For Rapid Prototyping, Divya Kanakanala
Masters Theses
"With multi-axis capability, direct laser deposition process can produce a metal part without the usage of support structures. In order to fully utilize such a capability, a slicing method for multi-axis metal deposition process is discussed. Using the geometry information of adjacent layers, the slicing direction and layer thickness can be changed as needed. A hierarchy structure is designed to manage the topological information which is used to determine the slicing sequence. The parallel slicing process is studied to build hollow type structure. With such a character, the hole like feature can be deposited directly to save the required machining …
Improving Parallel I/O Performance Using Interval I/O, Jeremy Logan
Improving Parallel I/O Performance Using Interval I/O, Jeremy Logan
Electronic Theses and Dissertations
Today's most advanced scientific applications run on large clusters consisting of hundreds of thousands of processing cores, access state of the art parallel file systems that allow files to be distributed across hundreds of storage targets, and utilize advanced interconnections systems that allow for theoretical I/O bandwidth of hundreds of gigabytes per second. Despite these advanced technologies, these applications often fail to obtain a reasonable proportion of available I/O bandwidth. The reasons for the poor performance of application I/O include the noncontiguous I/O access patterns used for scientific computing, contention due to false sharing, and the somewhat finicky nature of …
Climate Investigations Using Ice Sheet And Mass Balance Models With Emphasis On North American Glaciation, Sean David Birkel
Climate Investigations Using Ice Sheet And Mass Balance Models With Emphasis On North American Glaciation, Sean David Birkel
Electronic Theses and Dissertations
This dissertation describes the application of the University of Maine Ice Sheet Model (UM-ISM) and Environmental Change Model (UM-ECM) to understanding mechanisms of ice-sheet/climate integration during ice ages. The UM-ECM, written by the author for this research, calculates equilibrium biome and snow/ice mass balance solutions for the globe based on modern input climatology and user-defined parameter values. The program was produced in conjunction with a National Science Foundation ITEST grant meant to seed inquiry-based classroom study of Earth systems using computer models. To that end, the UM-ECM serves as both a research and teaching tool. The model has a web-based …
Using Correlation Coefficients To Estimate Slopes In Multiple Linear Regression, Rudy Gideon
Using Correlation Coefficients To Estimate Slopes In Multiple Linear Regression, Rudy Gideon
Mathematical Sciences Faculty Publications
This short note takes correlation coefficients as the starting point to obtain inferential results in linear regression. Under certain conditions, the population correlation coefficient and the sampling correlation coefficient can be related via a Taylor series expansion to allow inference on the coefficients in simple and multiple regression. This general method includes nonparametric correlation coefficients and so gives a universal way to develop regression methods. This work is part of a correlation estimation system that uses correlation coefficients to perform estimation in many settings, for example, time series, nonlinear and generalized linear models, and individual distributions.
Amino Acid Transport In Thermophiles: Characterization Of An Arginine-Binding Protein In Thermotoga Maritima, Matthew S. Luchansky, Bryan S. Der, Sabato D'Auria, Gabriella Pocsfalvi, Luisa Iozzion, Daniela Marasco, Jonathan D. Dattelbaum
Amino Acid Transport In Thermophiles: Characterization Of An Arginine-Binding Protein In Thermotoga Maritima, Matthew S. Luchansky, Bryan S. Der, Sabato D'Auria, Gabriella Pocsfalvi, Luisa Iozzion, Daniela Marasco, Jonathan D. Dattelbaum
Chemistry Faculty Publications
Members of the periplasmic binding protein superfamily are involved in the selective passage of ligands through bacterial cell membranes. The hyperthermophilic eubacterium Thermotoga maritima was found to encode a highly stable and specific periplasmic arginine-binding protein (TM0593). Following signal sequence removal and overexpression in Escherichia coli, TM0593 was purified by thermoprecipitation and affinity chromatography. The ultra-stable protein with a monomeric molecular weight of 27.7 kDa was found to exist as both a homodimer and homotrimer at appreciable concentrations even under strongly denaturing conditions, with an estimated transition temperature of 116 °C. Its multimeric structure may provide further evidence of …
Tuning Σ-Holes: Charge Redistribution In The Heavy (Group 14) Analogues Of Simple And Mixed Halomethanes Can Impose Strong Propensities For Halogen Bonding, Kelling J. Donald, Bernard K. Wittmaack, Chad Crigger
Tuning Σ-Holes: Charge Redistribution In The Heavy (Group 14) Analogues Of Simple And Mixed Halomethanes Can Impose Strong Propensities For Halogen Bonding, Kelling J. Donald, Bernard K. Wittmaack, Chad Crigger
Chemistry Faculty Publications
Halogen bonding between halide sites (in substituted organic molecules or inorganic halides) and Lewis bases is a rapidly progressing area of exploration. Investigations of this phenomenon have improved our understanding of weak intermolecular interactions and suggested new possibilities in supramolecular chemistry and crystal engineering. The capacity for halogen bonding is investigated at the MP2(full) level of theory for 100 compounds, including all 80 MH4-nXn systems (M = C, Si, Ge, Sn, and Pb; X = F, Cl, Br, and I). The charge redistribution in these molecules and the (in)stability of the σ-hole at X as …
Centennial Eolian Cyclicity In The Great Plains, Usa: A Dominant Climate Pattern Of Wind Transport Over The Past 4000 Years?, Antje Schwalb, Walter E. Dean, Sherilyn C. Fritz, Christoph E. Geiss, Bernd Kromer
Centennial Eolian Cyclicity In The Great Plains, Usa: A Dominant Climate Pattern Of Wind Transport Over The Past 4000 Years?, Antje Schwalb, Walter E. Dean, Sherilyn C. Fritz, Christoph E. Geiss, Bernd Kromer
Department of Earth and Atmospheric Sciences: Faculty Publications
Proxy evidence at decadal resolution from Late Holocene sediments from Pickerel Lake, northeastern South Dakota, shows distinct centennial cycles (400-700 years) in magnetic susceptibility; contents of carbonate, organic carbon, and major elements; abundance in ostracodes; and δ18O and δ13C values in calcite. Proxies indicate cyclic changes in eolian input, productivity, and temperature. Maxima in magnetic susceptibility are accompanied by maxima in aluminum and iron mass accumulation rates (MARs), and in abundances of the ostracode Fabaeformiscandona rawsoni. This indicates variable windy, and dry conditions with westerly wind dominance, including during the Medieval Climate Anomaly. Maxima in …
A Study Of Fold Characteristics And Deformation Style Using The Evolution Of The Land Surface: Zagros Simply Folded Belt, Iran, Caroline M. Burberry, John W. Cosgrove, Jian-Guo Liu
A Study Of Fold Characteristics And Deformation Style Using The Evolution Of The Land Surface: Zagros Simply Folded Belt, Iran, Caroline M. Burberry, John W. Cosgrove, Jian-Guo Liu
Department of Earth and Atmospheric Sciences: Faculty Publications
Deformation styles within a fold-thrust belt can be understood in terms of the spatial organization and geometry of the fold structures. In young fold-thrust belts such as the Zagros, this geometry is reflected topographically by concordant landform morphology. Thus, the distribution of deformation structures can be characterized using satellite image analysis, digital elevation models, the drainage network and geomorphological indicators. The two distinct fold types considered in this study (fault-bend folds and detachment folds) both trending NW-SE, interact with streams flowing NE-SW from the High Zagros Mountains into the Persian Gulf. Multiple abandoned stream channels cross fault-bend folds related to …
A New Small-Bodied Species Of Palaeonictis (Creodonta, Oxyaenidae) From The Paleocene-Eocene Thermal Maximum, Stephen G. B. Chester, Jonathan I. Bloch, Ross Secord, Doug M. Boyer
A New Small-Bodied Species Of Palaeonictis (Creodonta, Oxyaenidae) From The Paleocene-Eocene Thermal Maximum, Stephen G. B. Chester, Jonathan I. Bloch, Ross Secord, Doug M. Boyer
Department of Earth and Atmospheric Sciences: Faculty Publications
Oxyaenid creodonts are extinct carnivorous mammals known from the Paleogene of North America, Europe, and Asia. The genus Palaeonictis is represented by three species that together span the late Paleocene to early Eocene of North America, and at least one species from the early Eocene of Europe. Previously, only a single trigonid of Palaeonictis was known from the interval encompassing the Paleocene-Eocene Thermal Maximum (PETM) in North America. We describe Palaeonictis wingi sp. nov. from the PETM in the Cabin Fork drainage, southeastern Bighorn Basin, Wyoming, based on associated right and left dentaries with P2-M2. Palaeonictis …
Tetrapod Fauna Of The Lowermost Usili Formation (Songea Group, Ruhuhu Basin) Of Southern Tanzania, With A New Burnetiid Record, Christian A. Sidor, Kenneth D. Angielczyk, D. Marie Weide, Roger M. H. Smith, Sterling J. Nesbitt, Linda A. Tsuji
Tetrapod Fauna Of The Lowermost Usili Formation (Songea Group, Ruhuhu Basin) Of Southern Tanzania, With A New Burnetiid Record, Christian A. Sidor, Kenneth D. Angielczyk, D. Marie Weide, Roger M. H. Smith, Sterling J. Nesbitt, Linda A. Tsuji
Department of Earth and Atmospheric Sciences: Faculty Publications
Vertebrate fossils from the Ruhuhu Basin of southern Tanzania have been known for over 75 years, but the details of their stratigraphic distribution remain imperfectly understood. Recent fieldwork in the Upper Permian Usili Formation (Songea Group) has led to the discovery of a tetrapod assemblage in a conglomeratic unit at its base. The fossils are concentrated in matrix-supported intraformational clay pebble conglomerates interpreted as mass flow deposits in wide, shallow channels in the distal reaches of an alluvial fan. Included in this new collection are fossils representing the first record of a burnetiid therapsid from Tanzania. The anatomy of the …
Collapse Of The Maya: Could Deforestation Have Contributed?, Robert J. Oglesby, Thomas L. Sever, William Saturno, David J. Erickson Iii, Jayanthi Srikishen
Collapse Of The Maya: Could Deforestation Have Contributed?, Robert J. Oglesby, Thomas L. Sever, William Saturno, David J. Erickson Iii, Jayanthi Srikishen
Department of Earth and Atmospheric Sciences: Faculty Publications
The collapse of the Maya civilization during the ninth century A.D. is a major conundrum in the history of mankind. This civilization reached a spectacular peak but then almost completely collapsed in the space of a few decades. While numerous explanations have been put forth to explain this collapse, in recent years, drought has gained favor. This is because water resources were a key for the Maya, especially to ensure their survival during the lengthy dry season that occurs where they lived. Natural drought is a known, recurring feature of this region, as evidenced by observational data, reconstructions of past …
Three-Body Dynamics In Single Ionization Of Atomic Hydrogen By 75 Kev Proton Impact, Aaron C. Laforge
Three-Body Dynamics In Single Ionization Of Atomic Hydrogen By 75 Kev Proton Impact, Aaron C. Laforge
Doctoral Dissertations
"Doubly differential cross sections (DDCS) for single ionization of atomic hydrogen by 75 keV proton impact have been measured as a function of the projectile scattering angle and energy loss. This pure three-body collision system represents a fundamental test case for the study of the reaction dynamics in few-body systems. A comparison between theory and experiment reveals that three-body dynamics is important at all scattering angles, and that an accurate description of the role of the projectile-target nucleus interaction as well as the second order projectile-electron interaction remains a major challenge to theory. However, progress is being made in understanding …
Impact Of Management Status, Gender, And Level Of Project Involvement On Corporate Governance In A Role-Based Enterprise Portal Environment, Daniel Augusto Pereira Brás Sequeira
Impact Of Management Status, Gender, And Level Of Project Involvement On Corporate Governance In A Role-Based Enterprise Portal Environment, Daniel Augusto Pereira Brás Sequeira
Masters Theses
"The underlying objective of this research project is to investigate the impact of management status, gender, and level of project involvement on corporate governance in a role-based enterprise portal environment. This is achieved through a case study which included the development of a role-based enterprise portal site prototype assessed through surveys targeted at different stakeholders at the case company. Six hypotheses were formulated addressing the core research question. The outcomes of the hypotheses testing suggest employees' perceptions of role-based enterprise portal's effectiveness, usability, and corporate identity design are, in general, not influenced by the employees' management role, gender, and project …
Neutrosophic Diagram And Classes Of Neutrosophic Paradoxes Or To The Outer-Limits Of Science, Florentin Smarandache
Neutrosophic Diagram And Classes Of Neutrosophic Paradoxes Or To The Outer-Limits Of Science, Florentin Smarandache
Branch Mathematics and Statistics Faculty and Staff Publications
These paradoxes are called “neutrosophic” since they are based on indeterminacy (or neutrality, i.e. neither true nor false), which is the third component in neutrosophic logic. We generalize the Venn diagram to a Neutrosophic Diagram, which deals with vague, inexact, ambiguous, illdefined ideas, statements, notions, entities with unclear borders. We define the neutrosophic truth table and introduce two neutrosophic operators (neuterization and antonymization operators) give many classes of neutrosophic paradoxes.
Fusion Of Sources Of Evidence With Different Importances And Reliabilities, Florentin Smarandache, Jean Dezert, J.M. Tacnet
Fusion Of Sources Of Evidence With Different Importances And Reliabilities, Florentin Smarandache, Jean Dezert, J.M. Tacnet
Branch Mathematics and Statistics Faculty and Staff Publications
This paper presents a new approach for combining sources of evidences with different importances and reliabilities. Usually, the combination of sources of evidences with different reliabilities is done by the classical Shafer’s discounting approach. Therefore, to consider unequal importances of sources, if any, a similar reliability discounting process is generally used, making no difference between the notion of importance and reliability. In fact, in multicriteria decision context, these notions should be clearly distinguished. This paper shows how this can be done and we provide simple examples to show the differences between both solutions for managing importances and reliabilities of sources. …
The Zeeman Effect In The Sobolev Approximation Ii. Radial Split Monopole Fields And The ‘Heartbeat’ Stokes V Profile., K. Gayley, Richard Ignace
The Zeeman Effect In The Sobolev Approximation Ii. Radial Split Monopole Fields And The ‘Heartbeat’ Stokes V Profile., K. Gayley, Richard Ignace
ETSU Faculty Works
We calculate the circularly polarized Stokes V(λ) profile for emission lines, formed in hot-star winds threaded with a weak radial magnetic field. For simplicity, the field is treated as a split monopole under the assumptions that it has been radially combed by the wind, and rotation is not playing a central role. Invoking the weak-field approximation, we find that the V(λ) profile has a characteristic “heartbeat” shape exhibiting multiple sign inversions, which might be mistaken for noise in the absence of theoretical guidance. We also conclude that there is a tendency for the V(λ) profile to integrate to zero on …
Copper Isotope Fractionation During Surface Adsorption And Intracellular Incorporation By Bacteria, Jesica Urbina Navarrete
Copper Isotope Fractionation During Surface Adsorption And Intracellular Incorporation By Bacteria, Jesica Urbina Navarrete
Open Access Theses & Dissertations
Copper isotopes may prove to be a useful tool for investigating bacteria-metal interactions recorded in natural waters, soils, and rocks. However, experimental data that constrain Cu isotope fractionation in biologic systems are limited and unclear. In this study we utilized Cu isotopes (65Cu) as a tool to investigate Cu-bacteria interactions, including surface adsorption and intracellular incorporation. Experiments were conducted with individual Gram-positive (Bacillus subtilis) and Gram-negative (Escherichia coli) bacterial species as well as with bacterial consortia from several natural environments. Adsorption experiments were conducted with live or dead cells over the pH range 2.5 to 6. Surface adsorption of Cu …
Scrap Reduction Model: By Combination Of Dmaic And Design Of Experiments, Anoop J. Randive
Scrap Reduction Model: By Combination Of Dmaic And Design Of Experiments, Anoop J. Randive
Open Access Theses & Dissertations
This project deals with the experimentation which took place at a cable manufacturing company. The thesis describes and summarizes the various strategies and techniques that has been applied and practiced for scrap reduction. DMAIC and Six Sigma Technology has been proven very help full in order to reduce scrap to a major extent. DMAIC help to identify areas in process where extra expense exist, identify the biggest impact factor related production expenses, introduce appropriate measurement system, optimize process and reduce production cost and time. Many issues were detected by the production, such as a lack of a unified procedure for …
A Front-End For An Ownership Object Graph Interactive Editor, Talia Frances Selitsky
A Front-End For An Ownership Object Graph Interactive Editor, Talia Frances Selitsky
Wayne State University Theses
Runtime views which show runtime structure, is a type of object graph. They show components as groups of objects and data structures. Runtime views are useful for tasks related to performance, reliability, and security. Most previous work on extracting object graphs has produced flat object graphs which are not scalable. Ownership object graphs (OOGs) increase the scalability of object graphs because it nests objects, creating hierarchy. Recent work has shown that sound extraction of OOGs from object-oriented systems is technically feasible. Soundness means that in any execution of the program, every object can be mapped to exactly one component in …
The Roles Of Rhle And Hfq In Srna-Dependent Gene Regulation, Abeykoon Jayalath Iresha Sandeepanie Rathnayake
The Roles Of Rhle And Hfq In Srna-Dependent Gene Regulation, Abeykoon Jayalath Iresha Sandeepanie Rathnayake
Wayne State University Theses
THE ROLES OF RHLE AND HFQ IN SRNA-DEPENDENT GENE REGULATION
by
ABEYKOON JAYALATH IRESHA SANDEEPANIE RATHNAYAKE
DECEMBER 2010
Advisor: Dr. Andrew Feig
Major: Chemistry
Degree: Master of Science
Bacteria are adapted to live in diverse environmental conditions. Thus, they show excellent tolerance and response to extreme environmental conditions caused by low or high temperatures, high salinity, reactive oxygen species or high nutrient concentrations. sRNAs have been identified and characterized as cis-acting or trans-acting post-transcriptional regulators in diverse cellular processes including virulence and adaptation to environmental stress (11,12,14,15). Interactions of sRNAs and target mRNAs result in translational repression, translational activation or/and …
Variational Analysis In Parametric Optimization, Yen Nhi Nguyen Thi
Variational Analysis In Parametric Optimization, Yen Nhi Nguyen Thi
Wayne State University Dissertations
The dissertation is devoted to the development of variational analysis and generalized differentiation in infinite dimensions. We derive new calculus rules for both first-order partial subdifferentials and second-order partial subdifferentials in the framework of general Banach spaces as well as more developed rules in the framework of Asplund spaces. This calculus is applied in the study of sensitivity analysis for solution maps to the parameterized generalized equations in Asplund spaces, where both bases and fields are parameter-dependent multifunctions. We analyze the parametric sensitivity of either stationary points or stationary point multiplier multifunctions associated with parameterized optimization problems under consideration. The …
Development And Applications Of Thioacids In Peptide Chemistry And Exploration Of Methods Toward The Stereochemical Elucidation And Synthesis Of Virgineone, Kasinath Sana
Wayne State University Dissertations
ABSTRACT
DEVELOPMENT AND APPLICATIONS OF THIOACIDS IN PEPTIDE CHEMISTRY AND EXPLORATION OF METHODS TOWARD THE STEREOCHEMICAL ELUCIDATION AND SYNTHESIS OF VIRGINEONE
by
KASINATH SANA
December 2010
Advisor: David Crich
Major: Chemistry
Degree: Doctor of Philosophy
This dissertation describes investigations toward the development of methods for the synthesis of peptidyl thioacids and thioesters, with particular emphasis on applications in peptide chemistry, and the exploration of methods toward the assignment of the relative and absolute configuration of virgineone and its total synthesis.
The first part of chapter one introduces the general characteristics and reactivity of thioacids, and describes their potential for application …
How Long Does This Litter Last?, Public Lands Institute
How Long Does This Litter Last?, Public Lands Institute
Anti-littering Presentations
Timeline for how long different types of waste last in the Nevada desert.