Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Wright State University

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 1411 - 1440 of 7018

Full-Text Articles in Entire DC Network

A Study On Avifauna Present In Different Zones Of Chitral Districts, Madeeha Manzoor, Adila Nazli, Sabiha Shamim, Fida Muhammad Khan Jan 2017

A Study On Avifauna Present In Different Zones Of Chitral Districts, Madeeha Manzoor, Adila Nazli, Sabiha Shamim, Fida Muhammad Khan

Journal of Bioresource Management

Chitral is a unique division ofPakistanin North western extremes of the country lies in the Hindukush range. Because of its isolation from other adjacent areas, its ecology is least disturbed and also lacks the proper scientific checklist of its flora and fauna. This study is designed to explore its various regions to gather the data of both Passerines and Non- passerines currently present in the region. Several visits will be made, birds will be searched, pictures will be taken and after identification checklist will be formulated and its comparison with existing data will be reported.

Go to article

Extraordinary Optical Transmission In Aligned Carbon Nanotube Devices At Terahertz Frequencies., Shaikhah F. Almousa Jan 2017

Extraordinary Optical Transmission In Aligned Carbon Nanotube Devices At Terahertz Frequencies., Shaikhah F. Almousa

Browse all Theses and Dissertations

In the phenomenon known as extraordinary optical transmission (EOT), a narrow band of selected frequencies are transmitted when incident on an array of subwavelength periodic apertures where the resonant frequency is determined by the geometry of the array of apertures and optical properties of the metal-dielectric interface. This takes place due to the excitation of surface plasmon polaritons (SPPs) at the metal and dielectric interface. Using the COMSOL Multiphysics software RF Module, a unit cell of a carbon nanotube (CNT) based EOT device is modeled in order to verify theoretical calculations of the resonant frequency using S-parameter calculations. The simulation …

Go to article

The Impacts Of White-Tailed Deer (Odocoileus Virginianus) Herbivory On The Forage Quality Of Forest Vegetation, Jonathan David Becker Jan 2017

The Impacts Of White-Tailed Deer (Odocoileus Virginianus) Herbivory On The Forage Quality Of Forest Vegetation, Jonathan David Becker

Browse all Theses and Dissertations

White-tailed deer (Odocoileus virginianus) are abundant across North America. Deer impact ecosystems, both directly and indirectly. These impacts are driven by the foraging preferences of deer. The energy, protein, mineral, fiber, and secondary metabolite content of plants are important factors that inform the selective herbivory of deer. I examined the interactions between forage quality and deer impacts in northern Wisconsin using deer exclosures. I examined the forage quality of four focal species (Acer saccharum, Maianthemum canadense, Dryopteris intermedia and Carex pensylvanica) in both control and exclosure plots. Forage quality parameters measured were energy, protein, ash, phosphorus, silica, fiber, and saponins. …

Go to article

Analysis And Sensitivity Study Of Zero-Dimensional Modeling Of Human Blood Circulation Network, Roussel Rahman Jan 2017

Analysis And Sensitivity Study Of Zero-Dimensional Modeling Of Human Blood Circulation Network, Roussel Rahman

Browse all Theses and Dissertations

The systemic circulation has a large number of vessels; therefore, 3-D simulation of pulse-wave propagation in the entire cardiovascular system is difficult and computationally expensive. Zero-Dimensional (Zero-D) and One-Dimensional (1-D) models are simplified representations of the cardiovascular network; they can be coupled as supplements to regional 3-D models for closed-loop multi-scale studies or be simulated as self-sufficient representations of the blood-flow network. Unlike Zero-D models, 1-D models can provide linear space-wise information for the vessels. However, Zero-D models can prove to be more useful in particular cases; as flexibility in adjusting parameters facilitate in tailoring the model to specific needs. …

Go to article

An Investigation On The Stress Intensity Factor Of Surface Micro-Cracks, Sirisha Divya Arli Jan 2017

An Investigation On The Stress Intensity Factor Of Surface Micro-Cracks, Sirisha Divya Arli

Browse all Theses and Dissertations

The contact fatigue failure in the form of micro or macro-scale pitting is an important failure mode for rolling mechanical elements, such as bearings and gears that are widely used in the automotive, aerospace and wind turbine fields. The micro-pitting process in some cases, gradually removes the surface material through fatigue wear, altering the geometry of the contact surfaces to alleviate the contact pressure decelerating the continued pitting rate. The propagation of the micro-cracks in other cases, goes deep into the material along a shallow angle, turns parallel to the surface at a certain depth, where the maximum shear or …

Go to article

Semantics-Based Summarization Of Entities In Knowledge Graphs, Kalpa Gunaratna Jan 2017

Semantics-Based Summarization Of Entities In Knowledge Graphs, Kalpa Gunaratna

Browse all Theses and Dissertations

The processing of structured and semi-structured content on the Web has been gaining attention with the rapid progress in the Linking Open Data project and the development of commercial knowledge graphs. Knowledge graphs capture domain-specific or encyclopedic knowledge in the form of a data layer and add rich and explicit semantics on top of the data layer to infer additional knowledge. The data layer of a knowledge graph represents entities and their descriptions. The semantic layer on top of the data layer is called the schema (ontology), where relationships of the entity descriptions, their classes, and the hierarchy of the …

Go to article

Plasma Property Estimation From Dual-Wavelength Interferometry, Andrew J. Hamilton Jan 2017

Plasma Property Estimation From Dual-Wavelength Interferometry, Andrew J. Hamilton

Browse all Theses and Dissertations

Diagnostics are necessary for measurement of plasma parameters such as electron, ion and atomic densities, electron temperature, plasma expansion velocity and spatial resolution of density gradients. These parameters play a critical role in defining how a plasma will interact with electromagnetic radiation. For example, the plasma black-out phenomenon occurs when electromagnetic waves are at frequencies below the plasma frequency, where plasma frequency is a function of electron density. Wave propagation diagnostics can improve understanding of a plasma when measurement supports parameter estimation. In this report, the dual-wavelength interferometry method provides a single diagnostic capability to measure plasma expansion velocity, atomic …

Go to article

Synthesis Of 4-Iodo-3-(2-Iodoaryl) And 4-Bromo-3-(2-Bromoaryl) Sydnones And Their Reactions With Sodium Sulfite, Sodium Borohydride, And Iodine Monochloride, Kyle Jacob Liddy Jan 2017

Synthesis Of 4-Iodo-3-(2-Iodoaryl) And 4-Bromo-3-(2-Bromoaryl) Sydnones And Their Reactions With Sodium Sulfite, Sodium Borohydride, And Iodine Monochloride, Kyle Jacob Liddy

Browse all Theses and Dissertations

One goal of the Turnbull research group has been the synthesis of dihalogenated arylsydnones; i.e. sydnones with halogen substitution on the sydnone ring itself, as well as at the position on the aryl ring ortho to the sydnone. Further, it has been of interest to explore the reactivity of these compounds, once obtained. The present study examined the synthesis of 4-iodo-3-(2-iodoaryl)-, or “diiodo”, and 4-bromo-3-(2-bromoaryl)-, or “dibromo”, sydnones and the reactions of these compounds with Na2SO3 (sodium sulfite) and NaBH4 (sodium borohydride) to create a better understanding of the reactivity of diiodo and dibromo arylsydnones in general. Additionally, the reactivity …

Go to article

A Power Iteration Based Co-Training Approach To Achieve Convergence For Multi-View Clustering, Pavankalyan Yallamelli Jan 2017

A Power Iteration Based Co-Training Approach To Achieve Convergence For Multi-View Clustering, Pavankalyan Yallamelli

Browse all Theses and Dissertations

Collecting diversified opinions is the key to achieve "the Wisdom of Crowd". In this work, we propose to use a novel multi-view clustering method to group the crowd so that diversified opinions can be effectively sampled from different groups of people.Clustering is the process of dividing input data into possible subsets, where every element (entity) in each subset is considered to be related by some similarity measure. For example, a set of social media users can be clustered using their locations or common interests. However, real-world data is often best represented by multiple views/dimensions. For example, a set of social …

Go to article

Vitamin D3 And Suppressor Of Cytokine Signaling Proteins Reduces Pro-Inflammatory Cytokines In An Alzheimer's Disease Like-Model Consisting Of Microglial And Neuronal Co-Cultures, Alexander Evdokiou Jan 2017

Vitamin D3 And Suppressor Of Cytokine Signaling Proteins Reduces Pro-Inflammatory Cytokines In An Alzheimer's Disease Like-Model Consisting Of Microglial And Neuronal Co-Cultures, Alexander Evdokiou

Browse all Theses and Dissertations

This study examined the inflammatory effects of amyloid-beta (A[beta]42) in a microglial-neuronal co-culture system and determined whether 1a, 25-dihydroxyvitamin D3 (1,25-(OH)2D3) along with suppressor of cytokine signaling (SOCS)1 and SOCS 3 mimetics would attenuate the inflammatory response to A[beta]42. This culture system, when seeded with A[beta]42, serves as an in vitro model for Alzheimer's disease (AD). In a neuronal-microglia co-culture, A[beta]42 stimulated microglia to secrete TNF-a, but with the addition of 1,25-(OH)2D3, TNF-a levels dropped by nearly eight-fold and to near zero values in the presence of both 1,25-(OH)2D3 and SOCS1 and SOCS 3 mimetics. The reduction of the inflammatory …

Go to article

Implementation And Evaluation Of Goal Selection In A Cognitive Architecture, Sravya Kondrakunta Jan 2017

Implementation And Evaluation Of Goal Selection In A Cognitive Architecture, Sravya Kondrakunta

Browse all Theses and Dissertations

A cognitive system attempts to achieve its goals by utilizing the appropriate resources present to yield the best possible outcome within a short duration. To achieve the goals in such an efficient manner, it is important for the agent to manage its goals well. Goal management not only makes the agent efficient but also flexible, more durable to the sudden changes in the environment, and self-reliant. Goal Management consists of various goal operations including goal formulation, selection, change, delegation, achievement, and monitoring. Each operation is unique and has its own significance in aiding the performance of the agent. The thesis …

Go to article

Hydrothermal Atomic Force Microscopy Investigation Of Barite Growth: The Role Of Spectator Ions In Elementary Step Edge Growth Kinetics And Hillock Morphology, Sarah A. Jindra Jan 2017

Hydrothermal Atomic Force Microscopy Investigation Of Barite Growth: The Role Of Spectator Ions In Elementary Step Edge Growth Kinetics And Hillock Morphology, Sarah A. Jindra

Browse all Theses and Dissertations

To better understand the role of spectator ions in barite growth, the kinetics of step edge growth on barite (001) surfaces were studied under various salt solutions. Hydrothermal Atomic Force Microscopy (HAFM) was used to investigate the effect of background electrolytes (NaCl, NaBr and NaNO3) as a function of saturation index and ionic strength (I) on barite growth sourced at dislocations at 108 oC. Results show that hillock morphology is affected by I, as well as type of anion, where the prevalence of steps aligned on the [010] direction is highest under Cl- There is a modest increase in kinetic …

Go to article

Estimating Channel Identification Quality In Passive Radar Using Lms Algorithms, Michael J. Callahan Jan 2017

Estimating Channel Identification Quality In Passive Radar Using Lms Algorithms, Michael J. Callahan

Browse all Theses and Dissertations

Passive bistatic radar can be an attractive choice relative to monostatic radar because it provides the ability to operate covertly; immunity to jamming and interference; the ability to operate outside of traditional radar bands; and reduced cost. The benefits of noise waveforms versus classic radar waveforms such as linear frequency modulation (LFM) are discussed in the literature. Noise waveforms, with their thumbtack ambiguity functions, are ideal for use in non-cooperative passive radar. Since many digital waveforms are randomized to make their spectra approximately white, noise-like waveforms may be readily available for opportunistic use by non-cooperative passive radar receivers. For instance, …

Go to article

Dynamic Modeling Of Thermal Management System With Exergy Based Optimization, Marcus J. Bracey Jan 2017

Dynamic Modeling Of Thermal Management System With Exergy Based Optimization, Marcus J. Bracey

Browse all Theses and Dissertations

System optimization and design of aircraft is required to achieve many of the long term objectives for future aircraft platforms. To address the necessity for system optimization a vehicle-level aircraft model has been developed in a multidisciplinary modeling and simulation environment. Individual subsystem models developed exclusively in MATLAB-SimulinkTM, representing the vehicle dynamics, the propulsion, electrical power, and thermal systems, and their associated controllers, are combined to investigate the energy and thermal management issues of tactical air vehicle platforms. A thermal vehicle level tip-to-tail model allows conceptual design trade studies of various subsystems and can quantify performance gains across the aircraft. …

Go to article

Ab Initio Study Of The Effects Of Humidity On Perovskite Based Hybrid Solar Cell Interfaces, Shantanu Rajendra Rachalwar Jan 2017

Ab Initio Study Of The Effects Of Humidity On Perovskite Based Hybrid Solar Cell Interfaces, Shantanu Rajendra Rachalwar

Browse all Theses and Dissertations

Despite the impressive success of perovskite-based hybrid solar cells, their widespread usage has been limited partially owing to stability issues under working environmental conditions. Among these, the effects of humidity are some of the most significant. Water intercalation generally degrades the material, shortens its useful life, and reduces the efficiency of photovoltaic energy conversion. Understanding the reasons for these effects can be achieved through detailed and accurate atomic-scale analysis. Here, we study water intercalation at the interfaces of perovskite-based hybrid solar cell material and TiO2 electrode. Accurate ab initio computer simulations are used to obtain structural and electronic properties. We …

Go to article

Development Of A Performance Assessment System For Language Learning, Imen Kasrani Jan 2017

Development Of A Performance Assessment System For Language Learning, Imen Kasrani

Browse all Theses and Dissertations

Recent advances in computer-assisted, language-speaking, learning/training technology have demonstrated its promising potential to improve the outcome of language learning in early education, special education, English as a Second Language (ESL), and foreign language. The growing number of readily available mobile app-based solutions help encourage interest in learning to speak a foreign language, but their effectiveness is limited due to their lack of objective assessment and performance feedback resembling expert judgment. For example, it has been recognized that, in early education, students learn best with one-on-one instructions. Unfortunately, teachers do not have the time, and it is challenging to extend the …

Go to article

Effects Of Abstraction And Assumptions On Modeling Motoneuron Pool Output, John Michael Allen Jan 2017

Effects Of Abstraction And Assumptions On Modeling Motoneuron Pool Output, John Michael Allen

Browse all Theses and Dissertations

Computational modeling has long been used in neuroscience as a supplement to more traditional experimental techniques, as it provides some advantages in terms of the level and detail of control available over the system being studied. At the same time, modeling has significant disadvantages by virtue of adding additional uncertainty to results and forcing the definition of potentially unclear physiological mechanisms. Nevertheless, modeling can provide useful insights when carefully defined and constrained. In this thesis, a model of the a-MN pool innervating the cat medial gastrocnemius was constructed. This model was then used to address two major questions, one regarding …

Go to article

Development Of An Android Based Performance Assessment System For Motivational Interviewing Training, Sowmya Pappu Jan 2017

Development Of An Android Based Performance Assessment System For Motivational Interviewing Training, Sowmya Pappu

Browse all Theses and Dissertations

Motivational Interviewing (MI) has been proved to be an effective Screening, Brief Intervention, and Referral to Treatment (SBIRT) technique. It is an evidence-based practice used to identify, reduce, and prevent problematic use, abuse, and dependence on alcohol and illicit drugs. It emphasizes on patient-centered counseling approach that can help resolve their ambivalence through a non-confrontational, goal-oriented style for eliciting behavior change from the patient, almost like patients talk themselves into change. This approach provokes less resistance and stimulates the progress of patients at their own pace towards deciding about planning, making and sustaining positive behavioral change. Thus, training medical professionals …

Go to article

Terahertz Molecular Spectroscopy As A Tool For Analytical Probing Of Cellular Metabolism, Mitchell Cameron Paul Jan 2017

Terahertz Molecular Spectroscopy As A Tool For Analytical Probing Of Cellular Metabolism, Mitchell Cameron Paul

Browse all Theses and Dissertations

Terahertz spectroscopy has found use as an analytical tool in determining chemical composition of exhaled human breath. This thesis demonstrates a novel application of this technology - analytical sensing of gaseous metabolic products of several types of human cell cultures. An innovative experimental system was developed for probing cellular metabolism using terahertz [THz] rotational spectroscopy. Gaseous emissions of cell cultures were analyzed and compared between several cell types. Cancerous and healthy lung cells as well as cancerous liver cells were studied. This technique carries a lot of promise as a noninvasive method of distinguishing between cell types and identifying cell …

Go to article

Hydrothermal Atomic Force Microscopy Investigation Of Barite Growth: The Role Of Spectator Ions In Elementary Step Edge Growth Kinetics And Hillock Morphology, Sarah A. Jindra Jan 2017

Hydrothermal Atomic Force Microscopy Investigation Of Barite Growth: The Role Of Spectator Ions In Elementary Step Edge Growth Kinetics And Hillock Morphology, Sarah A. Jindra

Browse all Theses and Dissertations

To better understand the role of spectator ions in barite growth, the kinetics of step edge growth on barite (001) surfaces were studied under various salt solutions. Hydrothermal Atomic Force Microscopy (HAFM) was used to investigate the effect of background electrolytes (NaCl, NaBr and NaNO3) as a function of saturation index and ionic strength (I) on barite growth sourced at dislocations at 108 oC. Results show that hillock morphology is affected by I, as well as type of anion, where the prevalence of steps aligned on the [010] direction is highest under Cl- …

Go to article

Abi And Beyond: Exploration Of The Precursors To Trust In The Human-Automation Domain, Christopher Stephen Calhoun Jan 2017

Abi And Beyond: Exploration Of The Precursors To Trust In The Human-Automation Domain, Christopher Stephen Calhoun

Browse all Theses and Dissertations

This study investigated the extent to which the well-known precursors of interpersonal trust (ability, benevolence, integrity, or ABI) could be exploited, redefined, or added to when considering and developing models of trust between humans and technology. The ABI model explains only about half of the variation in interpersonal trust (Colquitt, Scott, & LePine, 2007), so two additional precursors to trust from the interpersonal and automation trust domains - transparency and humanness - were identified and studied. The experimental task involved users interacting with an automated aid (image processing and recommender system) through a simulated unmanned ground vehicle (UGV) interface to …

Go to article

A Rhetoric To Climate Change Fashion: Base Of The Biomass Pyramid Is An Underestimated Carbon Sink, Syed Abbas, Ehjaz R. Abbas Jan 2017

A Rhetoric To Climate Change Fashion: Base Of The Biomass Pyramid Is An Underestimated Carbon Sink, Syed Abbas, Ehjaz R. Abbas

Journal of Bioresource Management

This writing is an attempt to present few wild ideas, rhetoric to climate change fashion. We discussed the possibility of escaped fertilizers being produced globally and their possible role in capturing atmospheric carbon believing that some factors of climate change are being ignored while other are being over emphasized.

Go to article

Interaction Of Very Low Frequency (Vlf) And Extremely Low Frequency (Elf) Waves In The Ionospheric Plasma And Parametric Antenna Concept, Tony C. Kim Jan 2017

Interaction Of Very Low Frequency (Vlf) And Extremely Low Frequency (Elf) Waves In The Ionospheric Plasma And Parametric Antenna Concept, Tony C. Kim

Browse all Theses and Dissertations

This research dramatically increase radiation efficiency of very low frequency (VLF) and extremely low frequency (ELF) antenna in the ionosphere by implementing a concept of a parametric antenna. The research addresses the interaction of the electromagnetic waves in the atmosphere; analyzes the radiation efficiency of different types of RF frequencies (ex: Very low Frequency (VLF) and Extremely Low Frequency (ELF)); and includes different types of antennas, such as dipole and loop antennas, in the ionosphere environment and simulating the differences to verify the parametric antenna concept. This VLF analysis can be performed many ways and this VLF frequency is widely …

Go to article

Efficient Reasoning Algorithms For Fragments Of Horn Description Logics, David Carral Jan 2017

Efficient Reasoning Algorithms For Fragments Of Horn Description Logics, David Carral

Browse all Theses and Dissertations

We characterize two fragments of Horn Description Logics and we define two specialized reasoning algorithms that effectively solve the standard reasoning tasks over each of such fragments. We believe our work to be of general interest since (1) a rather large proportion of real-world Horn ontologies belong to some of these two fragments and (2) the implementations based on our reasoning approach significantly outperform state-of-the-art reasoners. Claims (1) and (2) are extensively proven via empirically evaluation.

Go to article

Novel Implementation Of Finite Field Multipliers Over Gf(2m) For Emerging Cryptographic Applications, Nazeem Basha Shaik Jan 2017

Novel Implementation Of Finite Field Multipliers Over Gf(2m) For Emerging Cryptographic Applications, Nazeem Basha Shaik

Browse all Theses and Dissertations

Cryptographic and coding theory algorithms use arithmetic operations over finite fields. Finite field multiplications over GF(2m) are critical components for these systems. Well known irreducible polynomials are all-one-polynomials (AOP), equally spaced polynomial (ESP), trinomial and pentanomial. Due to its simple structure, AOP based multiplica- tion is easy to implement and hence the AOP based multiplication of variable length can be used as a standard computation core. In this thesis, first of all, we employ low register complexity AOP based systolic multiplication core to propose multiplication over GF(2m) based on NIST recommended pentanomials. The proposed parallel and serial ar- chitectures use …

Go to article

Analysis And Design Of High-Frequency Soft-Switching Dc-Dc Converter For Wireless Power Charging Applications, Abhishek V. Danekar Jan 2017

Analysis And Design Of High-Frequency Soft-Switching Dc-Dc Converter For Wireless Power Charging Applications, Abhishek V. Danekar

Browse all Theses and Dissertations

Wireless power transfer (WPT) technology is becoming attractive in a wide variety of applications such as electric-vehicle charging, induction heating, charging portable applications, industrial robots, and biomedical implants. Recent studies have shown various techniques to implement wireless power transfer and these techniques differ based on the type of applications. For example, for electric vehicle charging, the power levels are in the range 5 kW to 25 kW and the operating frequency is in the range 70 kHz to 110 kHz. On the other hand, for consumer applications, the power levels vary from a few watts to hundreds of watts and …

Go to article

Multi-Class Classification Of Textual Data: Detection And Mitigation Of Cheating In Massively Multiplayer Online Role Playing Games, Naga Sai Nikhil Maguluri Jan 2017

Multi-Class Classification Of Textual Data: Detection And Mitigation Of Cheating In Massively Multiplayer Online Role Playing Games, Naga Sai Nikhil Maguluri

Browse all Theses and Dissertations

The success of any multiplayer game depends on the player’s experience. Cheating/Hacking undermines the player’s experience and thus the success of that game. Cheaters, who use hacks, bots or trainers are ruining the gaming experience of a player and are making him leave the game. As the video game industry is a constantly increasing multibillion dollar economy, it is crucial to assure and maintain a state of security. Players reflect their gaming experience in one of the following places: multiplayer chat, game reviews, and social media. This thesis is an exploratory study where our goal is to experiment and propose …

Go to article

The Synthesis Of 3,5-Difluorobenzophenone Derivatives And Their Corresponding Peek Copolymers, Rachael Stuck Jan 2017

The Synthesis Of 3,5-Difluorobenzophenone Derivatives And Their Corresponding Peek Copolymers, Rachael Stuck

Browse all Theses and Dissertations

Poly(aryl ether ketone)s (PAEK) are high performance thermoplastics, which are chemically robust, semi-crystalline, and stable at high temperatures. Of the family of PAEKs, poly(ether ether ketone) (PEEK) is a well-known semi-crystalline thermoplastic widely used for electronics, energy, industrial, and medical applications due to its resistance to solvents, radiation, heat, and other environmental factors. The traditional PEEK is prepared from 4,4’-difluorobenzophenone (2) and disodium hydroquinone. However, a challenge is processability, since due to its highly crystalline nature, PEEK possesses very limited solubility. An approach to solve these issues is to pre-functionalize PEEK polymers synthesized by nucleophilic aromatic substitution from 3,5-difluorobenzophenone (1) …

Go to article

Toward The Synthesis Of Functionalized Poly (Ether Ether Ketone): Monitoring The Meta-Fluorine Displacement In 3,5,4’-Trifluorobenzophenone, Giovanni Covarrubias Jan 2017

Toward The Synthesis Of Functionalized Poly (Ether Ether Ketone): Monitoring The Meta-Fluorine Displacement In 3,5,4’-Trifluorobenzophenone, Giovanni Covarrubias

Browse all Theses and Dissertations

The synthesis of functionalized, linear poly (ether ether ketone), tailored to be semi-crystalline and soluble in a variety of organic-solvents was explored. Nucleophilic aromatic substitution was a chemical reaction method used to condense 3,5,4’-trifluorobenzophenone (TFK) with four different phenols at its para-positioned carbon-fluorine site: 4-methoxyphenol, 3-aminophenol, 4-bromophenol, and m-cresol. Further poly-condensation of functionalized TFK occurred at the meta-positioned carbon-fluorine sites with 4,4’-Bis[4-hydroxyphenoxy] benzophenone (Big A2) and 4,4’-difluorobenzophenone at molar equivalents of 1 to 0.5, respectively. The reaction afforded products that became insoluble in solvents needed for nuclear magnetic resonance spectroscopic (e.g. DMSO-d6) analysis. The lack of desirable compounds compelled the …

Go to article

Processing Global Properties In Scene Categorization, Hanshu Zhang Jan 2017

Processing Global Properties In Scene Categorization, Hanshu Zhang

Browse all Theses and Dissertations

The current research examined the role of global properties in human observers' scene perception. In Experiment 1, comparisons of four global properties ("natural", "manmade", "open", and "closed") were collected online from a wide range of subjective choices. These answers were analyzed in a pairwise comparison model to generate four standardized reference ranking scales describing the extent to which characteristics can describe scene global properties. In Experiment 2, scene images selected from the reference scales were used to test human's performance in processing global properties conjunctively. Cognitive modeling indicated that human observers were more efficient in categorizing scene images as "natural …

Go to article

First Prev Next Last