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Rapid Synthesis Of New Poly(Amide-Imide)S Based On N-(4-Carboxy Phenyl) Trimellitimide And Hydantoin Derivatives Under Microwave Irradiation, Khalil Faghihi, Mohammad Gholizadeh

Turkish Journal of Chemistry

Six new poly (amide-imide)s (6a-f) were prepared under microwave irradiation by polycondensation reaction of diacid chloride (4) with 6 different derivatives of hydantoins (5a-f) using O-cresol as a microwave absorbent. These new PAIs were obtained in high yield and with inherent viscosities between 0.15 and 0.25 dL/g. The resulting poly(amide-imide)s were characterized by elemental analysis, viscosity measurements, thermal gravimetric analysis (TGA & DTG), solubility test, and FT-IR spectroscopy. N-(4-chlorocarbonyl phenyl) trimellitimide acid chloride (4) was prepared by a 2-step reaction. First trimellitic anhydride (1) was reacted with 4-amino benzoic acid (2) in acetic acid solution and the resulting imide-acid [N-(4-carboxy …

Synthesis And Characterization Of Tetraoxime Ligand, Bis-[(2e,3e,2´E)-3,3´-(1,2-Phenylene-Dinitrilo)Dibutan-2-One Dioxime] And Its Dinuclear And Tetranuclear Copper(Ii)/Nickel(Ii) Complexes, Nevi̇n Karaböcek, Pinar Ekmekçi̇oğlu, Asligül Küçükdumlu, Serdar Karaböcek

Turkish Journal of Chemistry

A new tetraoxime, (H_4L), was prepared in EtOH by reacting biphenyl-3,3´,4,4´-tetramine with butane-2,3-dione oxime. The tetraoxime ligand was characterized by elemental analyses, H-NMR and ^{13}C-NMR, IR, and mass spectral studies. Dinuclear copper(II), nickel(II) and tetranuclear copper(II) complexes of tetraoxime ligand were prepared and characterized by elemental analyses, magnetic moments, IR, and mass spectral studies. In the dinuclear metal complexes, metal:ligand ratio was found as 2:1. Elemental analyses and stoichiometric and spectroscopic data of the metal complexes indicated that the metal ions were coordinated to the nitrogen atoms of oxime groups (C=N). In addition, total energy and heat formation for ligand …

Microwave-Assisted Synthesis Of Some Metal-Free Phthalocyanine Derivatives And A Comparison With Conventional Methods Of Their Synthesis, Özlem Seven, Bi̇rcan Di̇ndar, Burak Gülteki̇n

Turkish Journal of Chemistry

Synthesis of metal-free 2,9(10),16(17),23(24)-tetra(3,5- dimethylphenoxy) phthalocyanine, 2,9(10),16(17), 23(24)-tetra(4- tert-butylphenoxy) phthalocyanine, and 2,9(10),16(17),23(24)-tetra(3,5- di-tert-butyl-4-hydroxyphenyl) phthalocyanine was carried out via microwave irradiation. Furthermore, pentanol and lithium were used for the first time in the synthesis of metal-free phthalocyanine under microwave irradiation as a solvent and a base-catalyst, respectively. The microwave irradiation experiments were performed in a MARS5 with a CEM XP-1500 vessel. In addition, these compounds were obtained with conventional heating procedures to compare them with those obtained with microwave irradiation. The compounds were characterized by elemental and spectroscopic analysis, including UV-Vis, H NMR, FT-IR, and MALDI-TOF mass data. In particular, both …

Applications Of New Diffusion Models To Barrier Option Pricing And First Hitting Time In Finance, Keang Ly

Theses and Dissertations (Comprehensive)

The main focus of this thesis is in the application of a new family of analytical solvable diffusion models to arbitrage-free pricing exotic financial derivatives, such as barrier options. The family of diffusions is the so-called “Drifted Bessel family” having nonlinear (smile-like) local volatility with multiple adjustable parameters. In particular, the drifted Bessel-K diffusion is used to model asset (stock) price processes under a risk-neutral measure whereby discounted asset price are martingales.

Closed-form spectral expansions for barrier option values are derived within the Bessel-K family of models. This follow from the closed-form spectral expansions for the transition probability …

Implementing Technology In The Classroom: Assessing Teachers’ Needs Through The Use Of A Just-In-Time Support System, Alissa N. Anderson

Theses and Dissertations (Comprehensive)

Given the importance of computer technology in classrooms today, it is crucial to identify the types of supports that will facilitate teachers’ effective implementation of technology. Ten teachers (four kindergarten, four grade one, and two grade one/two) received just-in-time support while introducing a reading software program in their class. An additional 12 teachers (four kindergarten, seven grade one, and one grade two) were exposed to the software, but did not receive just-in-time support. Both quantitative and qualitative analyses of instructional sessions were conducted in order to determine the kinds of support that teachers required throughout the intervention. Results provided an …

A Qualitative Study Of How Writing Is Used In Catholic Secondary Schools To Foster Students' Metacognitive Skill Development, Bonnie Jean Davis

Doctoral Dissertations

unavailable

Going Beyond Our Borders : Global Literature And Teacher Choice, Guy Andrew Scott Roberts

Doctoral Dissertations

unavailable

Comparing High School Students' And Adults' Perceptions Of Technological Literacy, Henry Ladson Harrison Iii

STEMPS Theses & Dissertations

This study compared high school student's perceptions of technology and technological literacy to those perceptions of the general public. Additionally, individual student groups were compared statistically to determine significant differences between the groups. The ITEA/Gallup Poll instrument was used to survey high school student's perceptions of technology in the study. The instrument has been used twice (2001, 2004) in the United States and once (2005) in Hong Kong to survey adult's perceptions of technology. The student population in question consisted of three subgroups: students enrolled in a standards-based technology education courses, students enrolled in a Project Lead the Way® (PLTW®) …

Volunteers: Beyond Government Partners, Maria J. D'Agostino

Publications and Research

Over the past several years, practitioners and academics have expressed concern about the deteriorating morale and effectiveness of the federal civil service, given its aging workforce and the competition with the private sector for human capital. Recruiting qualified public servants is complicated by the negative perception of government. Attacks by politicians of all sides have contributed to a negative stereotype of the American civil service. Therefore, finding new ways to recruit and retain the best-qualified young graduates has become critical. This paper reports on an untapped resource – volunteers, explores the youth volunteer activity that occurs in the federal government, …

Providing Academic Leadership Through The Role Of Senior Lecturer 1 (Teaching) Using The Theme Of 'Sustainable Energy' As An Example, Jim Mcgovern

Articles

An academic leader should lead in their particular area and should love what they are doing. An example of leadership in the area of 'sustainable energy use' is presented that involves leading through identifying and participating in the development of emerging technologies. Excellent academic leadership can be provided by a Senior Lecturer through active research, incorporating the latest developments in student-centred learning in their work and providing example and encouragement for colleagues and learners.

Relating Fractal Dimension To Branching Behaviour In Filamentous Microorganisms, David Barry, Onwuarolu Ifeyinwa, Shauna Mcgee, Raymond Ryan, Gwilym Williams, Jonathan Blackledge

Articles

The productivity of an industrial fermentation process involving a filamentous microbe is heavily dependent on the morphological form adopted by the organism. The development of systems capable of rapidly and accurately characterising morphology within a given process represents a significant challenge to biotechnologists, as the complex phenotypes that are manifested are often not easily quantified. Conventional parameters employed in these analyses are of limited value, as they reveal little about the specific branching behaviour of the organism, which is an important consideration given the demonstrated link between branching frequency and metabolite production. More recently, fractal geometry has been employed in …

A Covert Encryption Method For Applications In Electronic Data Interchange, Jonathan Blackledge, Dmitry Dubovitskiy

Articles

A principal weakness of all encryption systems is that the output data can be ‘seen’ to be encrypted. In other words, encrypted data provides a ‘flag’ on the potential value of the information that has been encrypted. In this paper, we provide a new approach to ‘hiding’ encrypted data in a digital image.

In conventional (symmetric) encryption, the plaintext is usually represented as a binary stream and encrypted using an XOR type operation with a binary cipher. The algorithm used is ideally designed to: (i) generate a maximum entropy cipher so that there is no bias with regard to any …

Scattering From A Tenuous Random Medium With Applications In Optics, Jonathan Blackledge

Articles

Mathematical models for the scattering of light (and other radiation) tend to fall into two categories based on a weak field condition (single scattering processes) or a strong field condition (multiple scattering processes). In the latter case, the complexity of deterministic models coupled with available solutions often fail to provide results that are of value to engineering systems (e.g. imaging systems). For this reason, multiple scattering problems are often approached using stochastic modelling methods whose foundations lie in random walk theory where the amplitude and phase of the scattered field are taken to conform to an appropriate statistical process and …

The Numerical Comparison Of Flow Patterns And Propulsive Performances For The Hydromedusae Sarsia Tubulosa And Aequorea Victoria, Mehmet Sahin, Kamran Mohseni, Sean Colin

Arts & Sciences Faculty Publications

The thrust-generating mechanism of a prolate hydromedusa Sarsia tubulosa and an oblate hydromedusa Aequorea victoria was investigated by solving the incompressible Navier–Stokes equations in the swirl-free cylindrical coordinates. The calculations clearly show the vortex dynamics related to the thrust-generating mechanism, which is very important for understanding the underlying propulsion mechanism. The calculations for the prolate jetting hydromedusa S. tubulosa indicate the formation of a single starting vortex ring for each pulse cycle with a relatively high vortex formation number. However, the calculations for the oblate jet-paddling hydromedusa A. victoria indicate shedding of the opposite-signed vortex rings very close to each …

Giving In To Group Pressure: The Impact Of Socialization And Risk On Perceived Outcomes, Katharine A. Mcintyre, Judith Platania

Arts & Sciences Faculty Publications

The current study applies the perspective of decision theory to understanding how choices are made in an in-group setting involving social pressure and risk. Two hundred sixty-one undergraduate students provided assessments of consequences associated with illegally consuming alcohol in different environments with differing degrees of risk. In addition, size of the social group was varied as three, four, or nine. In order to determine the moderating effects, if any, of susceptibility to social influence, a measure of socialization was included. Results provide strong support for socialization as an explanation for how individuals interpret risk-related social situations.

The Bright Optical/Nir Afterglow Of The Faint Grb 080710 – Evidence Of A Jet Viewed Off-Axis, T. Krühler, J. Greiner, P. Afonso, D. Burlon, C. Clemens, R. Filgas, D. A. Kann, S. Klose, A. Küpcü Yolda¸, S. Mcbreen, F. Olivares, A. Rau, A. Rossi, S. Schulze, G. P. Szokoly, Adria Updike, A. Yolda¸S

Arts & Sciences Faculty Publications

Aims. We investigate the optical/near-infrared light curve of the afterglow of GRB 080710 in the context of rising afterglows. Methods. Optical and near-infrared photometry was performed using the seven-channel imager GROND and the Tautenburg Schmidt telescope. X-ray data were provided by the X-ray Telescope onboard the Swift satellite. We construct an empirical light curve model using the available broadband data, which is well-sampled in the time and frequency domains. Results. The optical/NIR light curve of the afterglow of GRB 080710 is dominated by an initial increase in brightness, which smoothly turns over into a shallow power law decay. At around …

Consciousness From A Naturalistic Perspective, Hugh R. Alcock

Theses and Dissertations (Comprehensive)

Despite advances in neuroscience some sceptics, e.g., David Chalmers, Colin McGinn and Thomas Nagel, contend that we are no nearer to achieving a scientific understanding of phenomenal consciousness. These sceptics claim that naturalising consciousness, i.e., subsuming it under our scientific theories, is either impossible, at least without radically reforming our current scientific practices, or perhaps beyond our cognitive grasp. Their scepticism is based on what is called the ‘problem of consciousness’ or the ‘hard problem’. I argue that their pessimism is unwarranted. Their conclusion is based on adopting a nonnaturalistic attitude, according to which our scientific theories must accommodate our …

The Role Of Geospatial Thinking And Geographic Skills In Effective Problem Solving With Gis: K-16 Education, Niem Tu Huynh

Theses and Dissertations (Comprehensive)

Effective use of a Geographic Information System (GIS) is hampered by the limited geospatial reasoning abilities of students. The ability to reason with spatial relations, more specifically apply geospatial concepts, including the identification of spatial patterns and spatial associations, is important to geographic problem solving in a GIS context. This dissertation examines the broad influence of three factors on GIS problem solving: 1) affection towards computers, geography, and mathematics, 2) geospatial thinking, as well as 3) geographic skills.

The research was conducted with 104 students in Waterloo, Ontario, Canada. Students were drawn from four educational levels: grade 9 students, 13 …

Constructed Identity, Subjective Identity And Inter-Subjective Transformation: An Exploration By Way Of Motherhood And Canadian Maternity Benefits, Patricia Van Katwyk

Theses and Dissertations (Comprehensive)

When identity is conceptualized as a fluid and ongoing process that is mutually influenced by subjective and constructed experience, an interplay can occur that engenders and signifies collective life. With an acknowledgement of motherhood as a politically and emotionally charged identity experience, and asserting the capacity of social policy to sustain a constructed ideology, this paper explores a conversation that occurred between 28 mothers in Canada. The site of this conversation was an on-line journal (blog). Using a participatory narrative action method of research, the mothers participated as co-researchers, conducting a narrative analysis of one another’s narratives and a policy …

Toward A More Holistic Approach To The Conservation Management Of Southern Ontario’S Small Protected Areas, Wilfred Gregory Tschirhart

Theses and Dissertations (Comprehensive)

Within Southern Ontario’s highly fragmented greater natural ecosystem, there remain numerous relatively small scattered areas which bear at least some resemblance to their former pre-European/Canadian settlement natural ecosystem. In their present state they serve as reservoirs of their particular ecoregion’s indigenous plant and animal species. In proportion to their limited spatial areas, degree of isolation, existing ecological integrity, and long-term ecological carrying capacity they are stores of natural capital, which is beneficial to both nature and society. They co-exist with Southern Ontario’s well developed socioeconomic/cultural system, on whose stewardship their long-term integrity is becoming increasingly dependent, which creates increased environmental …

Triple Differential Measurements Of Single And Multiple Ionization Of Argon By Electron And Positron Impact, Jared M. Gavin

Doctoral Dissertations

"Singly, doubly, and triply differential measurements of single and multiple ionization of Ar by 1 keV positron and electron impact have been measured for projectile energy losses from 0 to 200 eV, scattering angles of 0° to ±5°, and electron emission angles from 45° to 135°. For single ionization, both projectiles show similar overall energy loss distributions but differ with respect to varying scattering angles. Triply differential yields for the electron emission demonstrate the binary and recoil features but the lobes are distorted because of extraction field effects plus variations in grid transmission and solid angle as a function of …

Satellite Outreach Services Program To Under-Represented Students: "Being In Their Space, Not On Myspace", Kathleen Keating, Paulita Aguilar

University Libraries & Learning Sciences Faculty and Staff Publications

strategic goal of the University of New Mexico is student retention, especially for underrepresented students. To assist in reaching that goal, the University Libraries offered the Satellite Outreach Services Program, which included reference and instruction, and was provided in the university's multicultural student services centers. This article describes the program's planning, implementation, and statistics and includes a detailed description of outreach activities for one of the student centers, American Indian Student Services.

Investment Shell Cracking, Edward A. Druschitz

Masters Theses

"Shell cracking is the single greatest problem affecting investment casters. A clearer understanding of the factors affecting the melt profile of the wax can be gained using computational fluid dynamics (CFD) to model the interaction among 1) the thermal conductivity of the wax, 2) the thermal conductivity of the shell, and 3) the temperature of the autoclave during the autoclave de-waxing cycle. The most favorable melt profile results from a high autoclave temperature (438⁰K to 458⁰K) and saturated thermal conductivity of the shell (1.36 to 1.40 Wm⁻¹k⁻¹) in conjunction with a low wax thermal conductivity (0.33 Wm⁻¹k⁻¹). These parameters reduce …

Double-Glazing Interferometry, Vincent Toal, Emilia Mihaylova

Articles

This note describes how white light interference fringes can be seen by observing the Moon through a double-glazed window. White light interferometric fringes are normally observed only in a well-aligned interferometer whose optical path difference is less than the coherence length of the light source, which is approximately one micrometer for white light. Obtaining such fringes in a Michelson interferometer is not a trivial task.1 The interferometer is typically illuminated with a monochromatic source and the path length difference adjusted with a wedge angle between the interferometer mirrors so that five or six vertical fringes are visible, indicating nearly equal …

Optical Properties Of Silica-Mfi Doped Acrylamide-Based Photopolymer, Tzvetanka Babeva, Rosen Todorov, Svetlana Mintova, Temenujka Yovcheva, Izabela Naydenova, Vincent Toal

Articles

The optical properties of acrylamide-based photopolymer doped with pure silica MFI-type zeolites are studied by refractometric and spectrophotometric means. Dynamic Light Scattering and Transmission Electron Microscopy are used for zeolite characterization and laser refractometry and White Light Interferometric profilometry are used for surface characterization of the composites. Refractive indices and absorption coefficients of composites are determined from their transmittance and reflectance spectra. The calculated dispersion curves are further used for deriving the zeolites refractive index and porosity and the latter compared to the values of total pore volume obtained from N2-sorption measurements. The impact of the doping level on the …

Optical And Holographic Characteristics Of Photopolymer Layers, Temenujka Yovcheva, Izabela Naydenova, Ivanka Vlaeva, Suzanne Martin, Vincent Toal, Simeon Sainov

Articles

In the present work the optical and holographic characteristics of acrylamide-based photopolymer layers are studied. For the first time the refractive index change of a liquid acrylamide photopolymer due to exposure at 532 nm is obtained using a critical angle laser micro-refractometer. The 30 mm thick solid photopolymer films are prepared by casting on glass substrates. Bragg holographic gratings with spatial frequencies of 710 mm-1, 1050 mm-1 and 1600 mm-1 are recorded using a diode laser operating at 532 nm wavelength. The diffraction efficiency dependence on the exposure energy is investigated. The obtained results are compared with the Stetson holographic …

Investigation Of The Light Induced Redistribution Of Beta Nanoparticles In An Acrylamide-Based Photopolymer, Elsa Leite, Izabela Naydenova, Nitesh Pandey, Tzvetanka Babeva, G. Majano, Svetlana Mintova

Articles

We report the redistribution of colloidal zeolite Beta nanoparticles during holographic recording in acrylamide-based photopolymers. Using the techniques of confocal Raman spectroscopy and scanning electron microscopy coupled with energy dispersive x-ray analysis (SEM–EDX), we have observed a periodic pattern, whose spacing agrees with the fringe spacing of the recorded holographic diffraction grating. It was estimated that the fraction of nanoparticles redistributed as a result of the holographic recording is 40%. The effect of the nanoparticles on the average refractive index of the nanocomposite layers was studied by UV–visible spectroscopy. It was observed that the addition of zeolite nanoparticles leads to …

Second-Hand Smoke Exposure In Cars And Respiratory Health Effects In Children, Patrick J. Goodman, Z. Kabir, Luke Clancy, P.J. Manning, J. Holohan, S. Keogan

Articles

We examined potential associations of ever asthma, and symptoms of wheeze (past 12 months), hay fever, eczema and bronchitis (cough with phlegm) among school children exposed to second-hand smoke (SHS) in cars, using a modified Irish International Study of Asthma and Allergies in Childhood (ISAAC) protocol. 2,809 children of 13–14 yrs old and who selected randomly from post-primary schools throughout Ireland completed the 2007 ISAAC self-administered questionnaire. Adjusted OR (adjusted for sex, active smoking status of children interviewed and their SHS exposure at home) were estimated for the associations studied, using multivariable logistic regression techniques. Overall, 14.8% (13.9% in young …

Silicone Rubber Passive Samplers For Water Quality Monitoring Of Persistent Organic Pollutants In The Marine Environment, Susan O'Hara

Masters

Polychlorinated Biphenyls (PCBs) and Polyaromatic Hydrocarbons (PAHs) are internationally considered as persistent organic pollutants (POPs) which can be mutagenic, carcinogenic and may accumulate in aquatic organisms and potentially in the human chain. PCBs and PAHs are thus listed as priority pollutants in the Water Framework Directive (WFD) and under the Convention for the protection of the Marine Environment of the North-East Atlantic (Oslo Paris Convention: OSPAR). Currently most marine monitoring programmes involving such compounds rely on the collection and analysis of discrete water/sediment grab samples or on the analysis of filter feeding indicator organisms e.g. mussels. Such measurements can provide …

Common Data Set, 2008-2009, Planning, Research, And Policy Analysis

Common Data Set (2001-present)

Common Data Set 2008-2009 for Illinois State University