Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Physical Sciences and Mathematics (501)
- Engineering (300)
- Chemistry (128)
- Environmental Sciences (92)
- Earth Sciences (90)
-
- Life Sciences (88)
- Social and Behavioral Sciences (85)
- Computer Sciences (79)
- Education (71)
- Physics (67)
- Mechanical Engineering (66)
- Chemical Engineering (59)
- Analytical Chemistry (51)
- Geology (51)
- Electrical and Computer Engineering (47)
- Medicine and Health Sciences (44)
- Astrophysics and Astronomy (41)
- Artificial Intelligence and Robotics (40)
- Computer Engineering (39)
- Natural Resources and Conservation (38)
- Data Science (35)
- Operations Research, Systems Engineering and Industrial Engineering (34)
- Aerospace Engineering (33)
- Mathematics (33)
- Organic Chemistry (31)
- Statistics and Probability (29)
- Condensed Matter Physics (27)
- Materials Science and Engineering (27)
- Civil and Environmental Engineering (26)
- Physical Chemistry (26)
- Keyword
-
- Mechanical engineering (173)
- Electrical engineering (144)
- Computer science (121)
- Civil engineering (69)
- Industrial engineering (65)
-
- Mathematics (60)
- Petroleum engineering (56)
- Machine Learning (51)
- Aerospace engineering (50)
- Mining engineering (42)
- Chemical engineering (35)
- Educational technology (32)
- Energy (32)
- Artificial intelligence (31)
- Educational psychology (30)
- Higher education (30)
- Materials science (27)
- Educational administration (26)
- Curriculum development (23)
- Teacher education (23)
- Machine learning (22)
- Automotive engineering (21)
- Forestry (21)
- Biomedical engineering (20)
- Economics (20)
- Environmental engineering (20)
- Geology (20)
- Deep Learning (18)
- Artificial Intelligence (17)
- Educational leadership (17)
- Publication Year
- File Type
Articles 2521 - 2550 of 2867
Full-Text Articles in Entire DC Network
Protecting The Florida Keys: An Internet Gis/Ims Strategy For Benthic Habitat Management., Frank Crawford Martin
Protecting The Florida Keys: An Internet Gis/Ims Strategy For Benthic Habitat Management., Frank Crawford Martin
Graduate Theses, Dissertations, and Problem Reports (ETD)
Technological advancements in the Internet particularly in multimedia and other visualization approaches generally pose great potential for Geographic Information Science (GISci). This potential brings with it both conceptual and operational issues that require consideration and collective, long-range planning in order to effectively implement the developing technologies. The relevant issues surrounding this adoption in the area of benthic habitat management are examined. The Florida Keys National Marine Sanctuary (FKNMS), and specifically Conch Reef, are used as the case study for this work with particular attention to geographic information systems, multimedia and Internet map servers, management issues, logistical requirements, data access and …
A Droplet Formation And Entrainment Model For Stratified Liquid-Liquid Flows., Allen Elton Badeau Jr.
A Droplet Formation And Entrainment Model For Stratified Liquid-Liquid Flows., Allen Elton Badeau Jr.
Graduate Theses, Dissertations, and Problem Reports (ETD)
Droplet formation is a common phenomenon that occurs in liquid-liquid or liquid-gas two-phase flows where turbulent mixing is present. This study considers only liquid-liquid systems and presents the theoretical background and validation of a droplet formation and entrainment (DFE) model with application to stratified shear layer flows of diesel fuel and water. A parallel experimental study by Wu and Katz (1999) of the same flow is used as a guide in our analysis. The new Droplet Formation and Entrainment Model, DFE, is based on a previous DFE model [Wilson, W. (1999)] which used the gradient Richardson number, Rig, as the …
Penetration, Pressure Drop, And Wickering Characteristics Of Niosh Certified P-100 And P95 Filters Under Heavy Dop Loading., Amit Sharma
Graduate Theses, Dissertations, and Problem Reports (ETD)
Air is known to contain a variety of airborne matter that is considered as potential health hazards. These particles if ingested/inhaled have long term effects on the health of human beings. The best technique to prevent these harmful particles from reaching the respiratory tract is physical interception. Personal protective equipment such as respiratory filters are used extensively to administer clean air of exceptional quality. The objective of this study was to evaluate the performance of commercially available respirator filters subjected to extremely heavy loading conditions. Several commercially available brands of P-100 and P-95 particulate filters were tested. The test conditions …
A Three-Phase Constitutive Model For Macrobrittle Fatigue Damage Of Composites., Gasser Farouk Abdelal
A Three-Phase Constitutive Model For Macrobrittle Fatigue Damage Of Composites., Gasser Farouk Abdelal
Graduate Theses, Dissertations, and Problem Reports (ETD)
Failure in materials occurs as a result of damage accumulation. Damage in composite material can be studied applying the continuum approach or the micromechanical approach. The continuum approach treats the composite material as transversely isotropic medium. In this approach, there is no distinction between the fiber and the matrix. The micromechanical approach studies the different damage mechanisms such as, fiber damage, fiber/matrix debonding, and matrix cracking. The research in this dissertation is focused on applying the micromechanical approach. A micromechanical macrobrittle damage (damage under monotonic load) model is developed and compared with available experimental data. Then an anisotropic fatigue damage …
Even Start Family Literacy Program's Effects For Parents: Why Do They Participate?, Deborah A. Farrer
Even Start Family Literacy Program's Effects For Parents: Why Do They Participate?, Deborah A. Farrer
Graduate Theses, Dissertations, and Problem Reports (ETD)
Parents are recognized as the first and most important teachers of their children and their influence on children has been well documented. The Even Start Family Literacy program targets both parents and children fostering a home-school-community partnership of shared authority and responsibility for the educational development of children and adults. The purpose of the present study was to examine parents who participated in the Even Start program in terms of results/effectiveness of the program for them and in turn for their families. The investigation was an attempt to unveil the effects of the Even Start program on the parents in …
The Relationships Of Organizational Personality Variables With Worker Socio-Communicative Orientation, Communication Apprehension, Immediacy, And Job Satisfaction., Heather Teresa Smith
The Relationships Of Organizational Personality Variables With Worker Socio-Communicative Orientation, Communication Apprehension, Immediacy, And Job Satisfaction., Heather Teresa Smith
Graduate Theses, Dissertations, and Problem Reports (ETD)
This study examined the organizational personality types of "upward mobile," "ambivalent," and "indifferent" with reference to their relationships with worker sociocommunicative orientation, communication apprehension, immediacy, and job satisfaction. The study examined self-report data from the measures of organizational personality scales, job satisfaction, communication apprehension, immediacy, and assertiveness/responsiveness. The study found that each of the three personality variables have unique relationships (some linear, some non-linear) with communication apprehension, immediacy, assertiveness, responsiveness, and job satisfaction.
A Model To Predict The Long-Term Strength Of E-Glass Fiber Composites Subjected To Environmental Exposure., Thomas Miles Damiani
A Model To Predict The Long-Term Strength Of E-Glass Fiber Composites Subjected To Environmental Exposure., Thomas Miles Damiani
Graduate Theses, Dissertations, and Problem Reports (ETD)
Glass Fiber Reinforced Plastics (FRP) are being used in an increasing number of structures and machines because of their advantages over conventional materials such as steel or aluminum. However, sustained exposure to seemingly nominal service conditions can act to degrade the strength of an FRP composite, potentially negating the advantages of their use. This research sought to develop a theoretical model to predict the long-term strength of an FRP composite subjected to environmental exposure. Degradation models for the reinforcement fibers and the interphase region were developed and verified using existing data. The two constituent models were combined through the modification …
A Model For A Fles Program In Morgantown, West Virginia., Isabel Cristina Cadavid-Munera
A Model For A Fles Program In Morgantown, West Virginia., Isabel Cristina Cadavid-Munera
Graduate Theses, Dissertations, and Problem Reports (ETD)
There is an increasing interest in the development and implementation of foreign language programs in elementary school throughout the U.S. However, as some experts on the field of teaching foreign languages to children have pointed out, very often those programs are implemented without prior planning or thorough investigation. The present study was conducted in five schools in Morgantown, West Virginia, in order to determine the major strengths and weaknesses of the foreign language after school classes currently carried out at those schools. Questionnaires (to parents, classroom teachers, Spanish instructors, and site coordinators), class observations and interviews were the ethnographic techniques …
An Economic Analysis Of The Relationship Of Poverty And Income Inequality In Rural West Virginia., Semoa Costa Batista De Sousa
An Economic Analysis Of The Relationship Of Poverty And Income Inequality In Rural West Virginia., Semoa Costa Batista De Sousa
Graduate Theses, Dissertations, and Problem Reports (ETD)
There have been numerous research studies on poverty, income inequality, economic growth, and the relationship between these variables at national and regional levels. This thesis focuses on poverty and income inequality, in 38 rural counties of West Virginia. The study examines the possibility of simultaneity between poverty and income inequality (Gini index) using a two-stage least square regression with cross-sectional data for 1980 and 1990. Furthermore, ordinary least square regressions are used to investigate the main determinants of poverty and income inequality. The results confirm the possibility of simultaneity between poverty and income inequality. The proportions of the population in …
Use Of Track-Etched Polycarbonate Filters In Series To Mimic The Total Human Lung Deposition In The Ultrafine And Fine Particle Range From 0.03 To 0.40 Microns., Jennifer Lynn Hornsby-Myers
Use Of Track-Etched Polycarbonate Filters In Series To Mimic The Total Human Lung Deposition In The Ultrafine And Fine Particle Range From 0.03 To 0.40 Microns., Jennifer Lynn Hornsby-Myers
Graduate Theses, Dissertations, and Problem Reports (ETD)
Three 3.0m polycarbonate track-etched filters were used in series in a 37 mm cassette and tested at 2.2 L/min using an automated filter tester to determine the filter assembly’s deposition curve as a function of particle size from 0.03 to 0.4 m. The filter assembly’s efficiency curve was compared to Stahlhofen’s resting with nose breathing and working with mouth breathing human total lung deposition curves used by the ICRP. Bias maps show that the shape of the filter assembly’s deposition curve matches the two lung deposition curves in the ultrafine range under these specific test conditions. The efficiency curve of …
Modelling And Control Of The Unified Power Flow Controller (Upfc)., Azra Hasanovic
Modelling And Control Of The Unified Power Flow Controller (Upfc)., Azra Hasanovic
Graduate Theses, Dissertations, and Problem Reports (ETD)
The focus of this thesis is a FACTS device known as the Unified Power Flow Controller (UPFC). With its unique capability to control simultaneously real and reactive power flows on a transmission line as well as to regulate voltage at the bus where it is connected, this device creates a tremendous quality impact on power system stability. These features become even more significant knowing that the UPFC can allow loading of the transmission lines close to their thermal limits, forcing the power to flow through the desired paths. This will give the power system operators much needed flexibility in order …
Dynamic Behavior Characterization Of Fine Powders Consisting Of A Homogeneous Emulsion, And, Synthesis And Decomposition Of Methane Gas Hydrate: A Reaction Engineering Study., Sridhar Narasimhan
Dynamic Behavior Characterization Of Fine Powders Consisting Of A Homogeneous Emulsion, And, Synthesis And Decomposition Of Methane Gas Hydrate: A Reaction Engineering Study., Sridhar Narasimhan
Graduate Theses, Dissertations, and Problem Reports (ETD)
This work quantitatively characterizes the flow and mixing properties of aerated bulk fine powders between the minimum fluidization and minimum bubbling velocities (Umf < U < Umb). In order to accomplish this characterization, the viscosity of the emulsion phase was measured using the Maxwell’s model for the rheological behavior of complex bodies along with the set of rheological parameters proposed by Kono et al (1994). A unique property of the bulk fine powder called the relaxation time (t) was measured experimentally and this property was combined with another rheological parameter called the plastic deformation coefficient (Y) to give the viscosity of the emulsion phase as m = Yt. SECTION II This work describes the first homogeneous formation and decomposition of methane gas hydrates within several different synthetic sediments by using a highpressure batch reaction system. The pressure of the formation reaction was varied in the range of 6.8 – 13.6 MPa while the temperature was maintained constant at 273.5 K Decomposition of hydrate was accomplished through controlled depressurization starting at a pressure of 2.7 MPa, maintaining the temperature constant at 273.5 K. Overall reaction order, both for the formation and decomposition were also determined.
The Effects On Extracurricular Participation Of Academic Achievement, Self Concept, And Locus Of Control Among High School Students., Scott Randolph Johnson
The Effects On Extracurricular Participation Of Academic Achievement, Self Concept, And Locus Of Control Among High School Students., Scott Randolph Johnson
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this investigation was to examine the effects on extracurricular participation (i.e., athletic participation) of academic achievement, self concept, and locus of control among high school students. Participants included six thousand six hundred ninety-eight (N = 6,698) high school students, from the National Education Longitudinal Study:1988 (NELS:88) First- and Second-Follow-Up data collection phases. These individuals participated in extracurricular activities during the tenth and/or twelfth grade. A binomial logistic regression model estimated the effects of: (1) gender; (2) socio-economic status (SES); (3) locus of control; (4) self concept; (5) school location; (6) school's region; (7) tenth grade participation level …
A Hydrodynamic Model Of Semiconductors., Sixin Qian
A Hydrodynamic Model Of Semiconductors., Sixin Qian
Graduate Theses, Dissertations, and Problem Reports (ETD)
We study the three dimensional simplified hydrodynamic model of semi-conductors where the equations of energy conservation are eliminated by assuming a pressure-density relation. The system is a combination of three hyperbolic equations coupled with an elliptic one. We prove the linear stability and the existence of local classical solutions to the initial boundary value problem for this system. The Neumann condition corresponds to an insulated boundary. Because a compatible condition is required in solving the Neumann BVP (Boundary Value Problem), a special iteration scheme is introduced to handle this situation. Based on the existence of the classical solutions to this …
Computerized Training Methods: Effects On Retention And Rate Of Responding., Finnur Oddsson
Computerized Training Methods: Effects On Retention And Rate Of Responding., Finnur Oddsson
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this dissertation was to evaluate the difference between two methods for presenting training stimuli, Single- and Multi-trials procedures. The former presents one stimulus in a single workspace and the latter presents many stimuli. Experiment 1 attempted to explain why Multi-trial methods sustain higher rates of responding than Single-trials. The results showed that the primary reason for the high rates of responding to Multi-trials is the presence of multiple stimuli, which allow subjects to read ahead to a consecutive stimulus while responding to a previous one. Experiment 2 evaluated the generality of the findings of previous research that …
A Comparison Of Collaborative And Individualistic Problem Solving In Younger And Older Adults On An Everyday Task., Suling Cheng
A Comparison Of Collaborative And Individualistic Problem Solving In Younger And Older Adults On An Everyday Task., Suling Cheng
Graduate Theses, Dissertations, and Problem Reports (ETD)
Researchers examining everyday problem solving in adulthood have focused mainly on age differences in performance (e.g., Denney & Palmer, 1981). Older adults are often found to be poor problem solvers in comparison to younger adults because older adults use problem-solving strategies that are defined as less effective by researchers. Furthermore, researchers have focused on problem solving as a solitary activity and not as a collaborative activity. In addition, the problem-solving tasks researchers have used to measure everyday problem solving often resemble traditional problem-solving tasks. Thus, attention should be directed toward comparing younger and older adults on ecologically valid collaborative problem-solving …
An Integrated Cost Model For Software Reuse., Senta Fowler Chmiel
An Integrated Cost Model For Software Reuse., Senta Fowler Chmiel
Graduate Theses, Dissertations, and Problem Reports (ETD)
Several cost models have been proposed and assessed in the past for predicting and analyzing the costs associated with software reuse. The integrated cost model, which is presented in this thesis, is based on the premise that there are four decisions in the software reuse lifecycle: the decision to adopt a reuse-based software paradigm; the decision to initiate a domain engineering initiative; the decision to use reusable assets in the development of a given application; and the decision to develop reusable assets. The integrated cost model further considers that all these decisions must be justified by an economic rationale, and …
The Natural Rate Of Unemployment, Its Estimation, And Evaluation Of Its Estimators., Victor Vyron Claar
The Natural Rate Of Unemployment, Its Estimation, And Evaluation Of Its Estimators., Victor Vyron Claar
Graduate Theses, Dissertations, and Problem Reports (ETD)
This dissertation estimates a time series of the natural rate of unemployment via competing methods, and evaluates such methods both within sample and for forecasting purposes. The methods used include the Kalman and Hodrick-Prescott filters. Evaluation proceeds along two lines. First, a Phillips curve is used in order to assess how well deviations of actual inflation from expected inflation are explained by deviations of the actual unemployment rate from estimated natural rates within a given sample period. The evaluative criterion is the overall fit of each regression. The analysis indicates that the in-sample fit of the Phillips curve changes little …
The Effect Of Individual Difference Variables, Learning Environment, And Cognitive Task On Statistical Learning Performance., Ernest Frank
The Effect Of Individual Difference Variables, Learning Environment, And Cognitive Task On Statistical Learning Performance., Ernest Frank
Graduate Theses, Dissertations, and Problem Reports (ETD)
The problem of this research was to determine the effect of six independent individual difference variables (cognitive control, learning style, achievement motivation, locus of control, learning environment, and cognitive task) on the dependent variable of learning performance. Post facto research was conducted that resulted in significant findings for two of the twelve research hypotheses postulated. Specifically, the mean performance score of field independent students was found to be significantly higher than that of field dependent students and the mean performance score of the web-based learning environment condition was found to be significantly higher than that of the traditional learning environment …
Revised Glacial Margins And Wisconsin Meltwater Paleoflood Hydrology In Slippery Rock Creek Basin, Central Western Pennsylvania, Gary John D'Urso
Revised Glacial Margins And Wisconsin Meltwater Paleoflood Hydrology In Slippery Rock Creek Basin, Central Western Pennsylvania, Gary John D'Urso
Graduate Theses, Dissertations, and Problem Reports (ETD)
Glacial margins mapped in Slippery Rock Creek basin during the 1950s are problematic. The number of sedimentological, mineralogical, petrological, and textural analyses used to distinguish glacial drifts in the southern portion of the basin were inadequate to resolve the margins. Furthermore, misidentification of man-made deposits as glacial drift led to erroneous interpretations regarding the extent and character of pre-Wisconsin glacial deposits, and appears to have influenced subsequent soil mapping. Canadian Shield erratic weathering was the primary tool used in this study to re-investigate the glacial margins. Erratics display one of three distinctive weathering rinds, so glacial deposits can be differentiated …
The Usefulness Of Admission Data As A Predictor Of Completion Of An Associate Degree Nursing Program., Shelia Marie Kyle
The Usefulness Of Admission Data As A Predictor Of Completion Of An Associate Degree Nursing Program., Shelia Marie Kyle
Graduate Theses, Dissertations, and Problem Reports (ETD)
The purpose of this descriptive study was to examine whether or not selected variables used in the admission process can predict and the extent to which they can predict whether or not the student will graduate from an associate degree nursing program. The independent variables for this study were: Licensed Practical Nurse (LPN), number of courses completed prior to beginning the nursing program, the pre-admission Grade Point Average (GPA), the number of science courses completed pre-nursing, the number of courses repeated to earn a grade of C or better pre-nursing, and the number of hours transferred from other institutions of …
Mean Reversion In United States Stock Prices: A Panel Approach., Jeffrey Michael Gropp
Mean Reversion In United States Stock Prices: A Panel Approach., Jeffrey Michael Gropp
Graduate Theses, Dissertations, and Problem Reports (ETD)
The existence of market anomalies has long been recognized in the finance literature. Several studies have documented the effects of size, dividend yields, E/P ratios, book-to-market value ratios, turn of the year (January effect), investor overreaction, and mean reversion on market returns. Still, much controversy surrounds the existence of, and explanations for the observed market anomalies. In this dissertation, I attempt to overcome such difficulties in analyzing the existence of the market anomalies of investor overreaction and mean reversion, while providing recommendations for future research. In the first chapter of the dissertation I briefly discuss past research in the areas …
The Effects Of Fearful Responding Of Arithmetic Performance., Derek Richard Hopko
The Effects Of Fearful Responding Of Arithmetic Performance., Derek Richard Hopko
Graduate Theses, Dissertations, and Problem Reports (ETD)
Although anxiety-related responding and skill deficits have historically been associated with performance-based problems such as high mathematics anxiety, the relative contributions of these variables to substandard performance remains poorly understood. Utilizing a 7% carbon dioxide gas mixture to induce fear, the present study was designed to determine the impact of fear-related responding to cognitive task performance. Independent variables included anxiety group, gender, and gas condition. Dependent variables included behavioral, physiological, and self-report indices. A total of 64 university undergraduate students participated in the study. High and low math anxious individuals were randomly assigned to either a carbon dioxide or control …
The Development And Validation Of Science Learning Inventory (Sli): A Conceptual Change Framework., Mehdi Seyedmonir
The Development And Validation Of Science Learning Inventory (Sli): A Conceptual Change Framework., Mehdi Seyedmonir
Graduate Theses, Dissertations, and Problem Reports (ETD)
A multidimensional theoretical model, Conceptual Change Science Learning (CCSL), was developed based on Standard Model of Conceptual Change and Cognitive Reconstruction of Knowledge Model. The model addresses three main components of science learning, namely the learner's conceptual ecology, the message along with its social context, and the cognitive engagement. A learner's conceptual ecology is organized around three clusters, including epistemological beliefs, existing conceptions, and motivation. Learner's cognitive engagement is represented by a continuum from peripheral processing involving shallow cognitive engagement to central processing involving deep cognitive engagement. Through reciprocal, non-sequential interactions of such constructs, the learners' conceptual change is achieved. …
Java Challenge Software Project, Karuna Annavajjala
Java Challenge Software Project, Karuna Annavajjala
Graduate Theses, Dissertations, and Problem Reports (ETD)
Programming contests are a means of exploiting the problem solving capabilities of developers and they provide a forum for display of extraordinary programming skills. The Java Challenge (JC) Software Project is the saga of creating an automated, secure and responsive programming contest system for deployment on the Internet and to collect information about programming practices, habits, and trends in coding in such restricted environment. The methodology followed to design, implement, and evaluate such a system uses new technologies such as the WWW, mail filtering and sandboxing techniques. The current Java Challenge implementation runs the Java Challenge on a Solaris 2.6 …
Efficient And Flexible Algorithm For Plant Layout Generation, Li Weng
Efficient And Flexible Algorithm For Plant Layout Generation, Li Weng
Graduate Theses, Dissertations, and Problem Reports (ETD)
A facilities layout, also called plant layout, consists of the production areas, production related or support areas and personnel areas within the building. Plant layout design is one of the strategic fields that determine the long run efficiency of operation.;This dissertation proposes an efficient and flexible plant layout algorithm to minimize the material handling cost and deal with change in future. A material flow forecasting tool, a scheduling module related to layout design and an evaluation method of flexible layouts are also proposed by this dissertation. A computer-based system will be developed to integrate all of the functions.;The first chapter …
Regressive Model Approach To The Generation Of Test Trajectories, Brian James Taylor
Regressive Model Approach To The Generation Of Test Trajectories, Brian James Taylor
Graduate Theses, Dissertations, and Problem Reports (ETD)
One possible method of reliability assurance is the application of large testing sets upon a system via statistical reliability assessment. Under this method, a software system's operations are tested according to their actual usage. A problem with this approach is the large number of tests required to properly assess reliability. Complicating the process are situations where an input into the system is a trajectory of data, where a trajectory is defined as a series of data points with each point relying upon the previous points. Examples of trajectories of data include an airplane's flight path or data describing a nuclear …
Verification And Validation In Software Product Line Engineering, Edward Alton Addy
Verification And Validation In Software Product Line Engineering, Edward Alton Addy
Graduate Theses, Dissertations, and Problem Reports (ETD)
Verification and Validation (V&V) is currently performed during application development for many systems, especially safety-critical and mission-critical systems. However, the V&V process has been limited to single system development. This dissertation describes the extension of V&V from an individual application system to a product line of systems that are developed within an architecture-based software engineering environment.;In traditional V&V, the system provides the context under which the software will be evaluated, and V&V activities occur during all phases of the system development lifecycle. The transition to a product line approach to development removes the individual system as the context for evaluation, …
Physiological And Genetic Mechanism(S) Of Cold Acclimation In Rhododendron, Chon Chong Lim
Physiological And Genetic Mechanism(S) Of Cold Acclimation In Rhododendron, Chon Chong Lim
Graduate Theses, Dissertations, and Problem Reports (ETD)
An in vitro laboratory protocol for assessing cold hardiness (CH) in rhododendrons based on electrolyte-leakage was developed. The raw leakage data were transformed into percent-adjusted injury, which showed high correlation with injury data based on visual observations. The percent-adjusted injury data---fitted to the Gompertz function coupled with the Jackknife method---allowed for reliable and statistically sound estimations of Rhododendron leaf freezing-tolerance (LFT). Utilizing this method, Tmax values for Rhododendron cultivars, species, and populations were determined and ranked relatively. Our observation of a continuous distribution of LFT in F2 and backcross (BC) populations derived from a R. catawbiense x R. fortunei cross …
Optimal Power Flow Using A Genetic Algorithm And Linear Algebra, Reid S. Maust
Optimal Power Flow Using A Genetic Algorithm And Linear Algebra, Reid S. Maust
Graduate Theses, Dissertations, and Problem Reports (ETD)
Artificial intelligence is used to help a hypothetical electric utility meet is electric load economically. The optimal power flow problem (OPF) problem is an optimization problem, in which the utility strives to minimize its costs while satisfying all of its constraints. A genetic algorithm (GA)---a specific type of artificial intelligence-is employed to perform this optimization. To speed convergence, some theory from linear algebra is incorporated into the algorithm.;A GA provides several advantages over more traditional OPF algorithms. For instance, a GA does not constrain the shape of the generators' cost curves and is flexible enough to incorporate control devices such …