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A Machine Learning Method Suitable for Dynamic Domains

A Machine Learning Method Suitable for Dynamic Domains

Date: July 1996
Creator: Rowe, Michael C. (Michael Charles)
Description: The efficacy of a machine learning technique is domain dependent. Some machine learning techniques work very well for certain domains but are ill-suited for other domains. One area that is of real-world concern is the flexibility with which machine learning techniques can adapt to dynamic domains. Currently, there are no known reports of any system that can learn dynamic domains, short of starting over (i.e., re-running the program). Starting over is neither time nor cost efficient for real-world production environments. This dissertation studied a method, referred to as Experience Based Learning (EBL), that attempts to deal with conditions related to learning dynamic domains. EBL is an extension of Instance Based Learning methods. The hypothesis of the study related to this research was that the EBL method would automatically adjust to domain changes and still provide classification accuracy similar to methods that require starting over. To test this hypothesis, twelve widely studied machine learning datasets were used. A dynamic domain was simulated by presenting these datasets in an uninterrupted cycle of train, test, and retrain. The order of the twelve datasets and the order of records within each dataset were randomized to control for order biases in each of ten runs. ...
Contributing Partner: UNT Libraries
Macroinvertebrate Colonization and Assemblages Associated with Aquatic Macrophytes in a Newly Created Urban Floodway Ecosystem, Dallas, Tx

Macroinvertebrate Colonization and Assemblages Associated with Aquatic Macrophytes in a Newly Created Urban Floodway Ecosystem, Dallas, Tx

Date: August 2013
Creator: Schad, Aaron Neale
Description: A study of macroinvertebrate colonization and assemblages, including secondary productivity of the familiar bluet damselfly or Enallagma civile Hagen (Odonata: Coenagrionidae), associated with the aquatic macrophytes Heteranthera dubia (Jacq.) MacMill. (water stargrass) and Potamogeton nodosus Poir. (American pondweed) was conducted at the Dallas Floodway Extension Trinity River Project (DFE) Lower Chain of Wetlands (LCOW), Dallas, TX, from September 2010 through November 2011. Macroinvertebrate abundance, taxa richness, Simpson's index of diversity, and Simpson's evenness from the two macrophytes and from three different wetland cells of varying construction completion dates, water sources, and native aquatic vegetation establishment were analyzed along with basic water quality metrics (temperature °C, pH, dissolved oxygen mg/L, and conductivity µs/cm). E. civile nymphs were separated into five developmental classes for secondary productivity estimations between macrophytes and wetland cell types. Mean annual secondary productivity in the DFE LCOW among two macrophytes of E. civile was 1392.90 ash-free dry weight mg/m²/yr, standing stock biomass was 136.77 AFDW mg/m2/yr, cohort production / biomass (P/B) ratio was calculated to be 4.30 / yr and the annual production / biomass (P/B) ratio was 10.18 /yr.
Contributing Partner: UNT Libraries
Macroinvertebrate Community Structure as an Indicator of Watershed Health in the Upper Trinity River Basin, North Central Texas

Macroinvertebrate Community Structure as an Indicator of Watershed Health in the Upper Trinity River Basin, North Central Texas

Access: Use of this item is restricted to the UNT Community.
Date: May 2000
Creator: Stephenson, Jaynie M.
Description: This study describes macroinvertebrate community structure and assesses its potential in detecting point and non-point sources of disturbance associated with rural and urban areas in the Upper Trinity River Basin. Geospatial techniques were used to quantify landuse within the watershed in a GIS. At rural sites near the headwaters of the Trinity River, collector-gathering burrowers that are adapted to minimal flow comprised the majority of taxa. Destinies of taxa compositions at downstream sites increased and shifted toward psammophilic and rheophilic invertebrates, including primarily collector-filtering clingers, that are characteristic of shifting sand habitats in large prairie rivers. Benthic community structure generally benefited from point source impacts including wastewater treatment plant effluents that maintained higher flow. Community indices were negatively associated with forest landuse and positively associated with urban landuse. Partial CCA determined that flow and landuse contributed equally to species dispersions. Comparisons with historical biomonitoring studies in upper Trinity River Basin indicate improved watershed health.
Contributing Partner: UNT Libraries
"Mad Mary Sane" and Other Stories

"Mad Mary Sane" and Other Stories

Date: May 2006
Creator: Myers, Amanda Sullivan
Description: The following is a multi-genre collection, including short shorts, short fiction, non-fiction, and drama. Each piece utilizes Gothic motifs and dark comedy in an effort to explore life and loss.
Contributing Partner: UNT Libraries
Madness in Elizabethan Drama

Madness in Elizabethan Drama

Date: 1949
Creator: Wilks, Rowena Newman
Description: Insanity, which has long been a favorite theme of Elizabethan drama, summoned the dramatist's imagination to wonderful creations -- creations that were fantastic and grotesque, but unforgettable.
Contributing Partner: UNT Libraries
Maelstrom: the Last Coyote Tale

Maelstrom: the Last Coyote Tale

Date: December 1997
Creator: Claiborne, J. Taylor (John Taylor)
Description: It is a dark future, where corporations have taken the place of governmental bodies, and Earth is a myth, forgotten in the reconstruction after the Second Dark Age. One man--a clone--investigates a murder [that] leads him deep into a spirit quest of his own that will answer the questions of Man's heritage as well as his own identity. This story is a science fiction, but it is similar in structure to a Coyote tale and involves quite a bit of Navajo mythology. The use of Native American imagery is not an attempt to capitalize on another culture, but rather to study the culture and use allegorical elements that transcend many cultures. It must also be noted that non-Native American writers wrote all texts available on the subject. This fact should be taken into consideration by the reader.
Contributing Partner: UNT Libraries
Magnetic Exchange in Oxovanadium(IV) Complexes with N-Salicylideneamino Acids

Magnetic Exchange in Oxovanadium(IV) Complexes with N-Salicylideneamino Acids

Date: January 1968
Creator: Hu, James Hung-Jen
Description: Copper(II) and oxovanadium(IV) ions resemble one another magnetically in having one unpaired electron in their complexes irrespective of their geometrical structures and bond types involved. Copper(II) complexes with antiferromagnetic exchange are well known. On the contrary, antiferromagnetic exchange in oxovanadium(IV) complexes is rather new and not well established. Very few oxovanadium(IV) complexes have been reported to have this anomalous magnetic property. In the investigation of the magnetic properties of oxovanadium(IV) complexes, we have successfully prepared two series of new oxovanadium(IV) complexes with N-salicylideneamino acids.
Contributing Partner: UNT Libraries
Magnetic Properties of Oxovanadium(IV) Complexes of Substituted N-(Hydroxylalkyl) Salicylideneimines

Magnetic Properties of Oxovanadium(IV) Complexes of Substituted N-(Hydroxylalkyl) Salicylideneimines

Date: May 1972
Creator: Carey, Elbert Franklin
Description: A series of oxovanadium(IV) complexes of Schiff bases derived from substituted salicylaldehyde and aminoalcohols has been prepared and characterized. The Schiff bases coordinate through 0, N, and 0 as tridentate bivalent ligands. The primary purpose of the investigation is to describe the structure and bonding in these complexes. The subnormal magnetic properties of the complexes provide much information about both the structure and the bonding in the complexes.
Contributing Partner: UNT Libraries
Magnetic Resonance of Protons in the Earth's Magnetic Field

Magnetic Resonance of Protons in the Earth's Magnetic Field

Date: August 1959
Creator: Crosby, Richard Hill
Description: The purpose of the work reported here was to determine the feasibility of applying the nuclear induction technique of Bloch to the direct observation of nuclear magnetic resonance in the very weak magnetic field of the earth.
Contributing Partner: UNT Libraries
Magnetic Susceptibility of a Crystalline Free Radical

Magnetic Susceptibility of a Crystalline Free Radical

Date: June 1962
Creator: Smith, William C.
Description: The entirety of the investigation discussed in this paper was confined to a study of the spin resonance properties of unpaired electrons of an organic free radical. In the remainder of the paper the theory of electron spin resonance, the apparatus used in the investigation, and the experimental results obtained are discussed in that order.
Contributing Partner: UNT Libraries