Browsing Dissertations and Theses by Title
Now showing items 3403-3422 of 5409
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A Mossbauer study of FeSb[sub 2]O[sub 4]
(Northern Illinois University, 1993)^(121)Sb and ^(57)Fe Mossbauer effect measurements have been performed on FeSb[sub 2]O[sub 4], through the temperature range from 4.7°K to room temperature. Large quadrupole splittings are observed at both Sb site and Fe ... -
Mossbauer study of Iron(II) flouride (FeF₂)
(Northern Illinois University, 1985)A powdered sample of FeF₂ has been investigated by Fe ⁵⁷Fe Mossbauer spectroscopy in transmission and back-scattering geometry. The analysis of the spectra at room temperature obtained from both techniques revealed that ... -
A mossbauer study of phonon and electron anomalies in perovskite superconductor La₁.₈₅Sr.₁₅Cu.₉₅Sn.₀₅O₄
(Northern Illinois University, 1987)Temperature-dependent Mossbauer measurements have been carried out on the high T[sub c] oxide superconductor (La₁.₈₅Sr₀.₁₅) CuO₄ (T[sub c] = 37 K) doped with tin. Using the 23.88 keV Mossbauer resonance at ¹¹⁹Sn, the valency ... -
A Mossbauer study of REBa₂Cu₃₋xFexO₇₊δ (RE=Er,Dy;x=0.15,0.30) superconducting oxides
(Northern Illinois University, 1991)Mossbauer studies on ⁵⁷Fe-doped REBa₂Cu₃O₇_δ (RE=Er,Dy) were conducted with Fe concentration at 0.15 and 0.30. The results show that the magnetic behavior of the ⁵⁷Fe dopants, which mainly occupy Cu(l) sites, changes ... -
Mossbauer study of the oxygen order and superconductivity in Y(Ba₁-ₓSrₓ)₂(Cu₀.₉₉Fe₀.₀₁)₃Oy
(Northern Illinois University, 1988)⁵⁷Fe Mossbauer effect measurements have been performed at room temperature on Y(Ba₁-ₓSrₓ)₂(Cu₀.₉₉Fe₀.₀₁)₃O[sub y] with x from 0 to 1. In all samples, four quadrupole splittings, corresponding to iron atoms in different ... -
Mossbauer study of the oxygen order and superconductivity in Y₁₋ₓ Prₓ Ba₂ (Cu₀.₉₉Fe₀.₀₁)₃ O[sub y]
(Northern Illinois University, 1988)Mossbauer effect measurements at ⁵⁷Fe nuclei have been made at room temperature on Y₁₋ₓ Prₓ Ba₂ (Cu₀.₉₉Fe₀.₀₁)₃ O[sub y] with x = 0, 0.1, 0.2, 0.4, 0.5, 0.6, and 0.7. Neutron diffraction experiments show that iron atoms ... -
Mossbauer, resistivity, magnetization, and powder x-ray diffraction studies of colossal magnetoresistive La[sub 0.88] Sr[sub 0.12] Mn[sub 1-y] Fe[sub y] O[sub3] (y = 0, 0.02, and 0.04)
(Northern Illinois University, 1999)Mossbauer, resistivity, magnetization, and powder x-ray diffraction measurements have been made on La[sub 0.88] Sr[sub 0.12 Mn[sub 1-y] ^57Fe[sub y] O[sub 3] (y = 0.02, and 0.04), while measurements on the y = 0.0 sample ... -
Mothers' accuracy in predicting their children's performance on a vocabulary test : the Peabody Picture Vocabulary Test - Revised
(Northern Illinois University, 1981)It is the attempt of this study to provide a viable alternative to preschool screening programs which use the child as their only source of information and to determine the mothers' skill in assessment so necessary for ... -
Mothers, midwives, and modern medicine : an analysis of choice in the birth experience, South Sulawesi, Indonesia
(Northern Illinois University, 1996)Indonesia has a thriving population of traditional birth attendants, known as dukun beranak, and midwives, known as bidan. Dukun beranak annually help deliver over 65% of Indonesia's newborn children but with limited ... -
Motivational factors in an online professional development environment : a study of faculty's intention to teach online courses at King Khalid University
(Northern Illinois University, 2018)While people outside of the profession may see online teaching as a randomly constructed field, the development of distance learning in higher education settings has grown rapidly over the past ten years due to the massive ... -
Motivational orientation and self-regulation of young children
(Northern Illinois University, 1987)This experiment was designed to investigate external environmental influences and internal self-influence in young children's self-regulatory behavior. Subjects performed two tasks under lenient-demand conditions. External ... -
Moving beyond personal responsibility : a critical discourse analysis of digital citizenship curricula
(Northern Illinois University, 2016)This dissertation analyzes how the concept of "digital citizenship" is conceptualized and furthered through three freely available curricula intended for use with high school students: NetSmartz, Digital Citizenship in ... -
Mössbauer study of colossal magnetoresistive La[sub 1-x]Sr[sub x]Mn[sub 0.9]Fe[sub .1]O[sub 3] (x=0,0.1,0.2,0.3)
(Northern Illinois University, 1998)The Mössbauer effect is a phenomenon that makes it possible to study local magnetic and electric interactions. General concepts along with computational methods are introduced in the theoretical part of this thesis. Mössbauer ... -
Mössbauer study of Eu₁₄MnSb₁₁ and Yb₁₄MnSb₁₁ zintl compounds
(Northern Illinois University, 2004) -
Mössbauer study of the Chevrel Phase Compound Dy₁.₀Fe.₀₅Mo₆S₈
(Northern Illinois University, 1983)A Mossbauer effect study was designed to use ⁵⁷Fe as an impurity probe in the superconducting Chevrel phase compound Dy₁.₀Mo₆S₈ over the temperature range 0.43 K to 300 K. The material produced, Dy₁.₀⁵⁷Fe₀.₀₅Mo₆S₈, was ... -
Mössbauer study of the Chevrel phase compound Ho₁.₀Fe.₀₅Mo₆S₈
(Northern Illinois University, 1980)A Mössbauer study has been designed to use ⁵⁷Fe as an impurity probe in the superconducting compound Ho₁.₀Mo₆S₈ over the temperature range 4.3 K to 673 K. Although it has been determined by neutron diffraction that Fe ... -
Mössbauer study of the Chevrel Phase compound Sn.₇₅Eu.₂₅Mo₆S₈
(Northern Illinois University, 1978)A Mössbauer study has been designed to measure the ¹⁵¹Eu vibrational motion over the temperature range of 4.2 K to 160. K in the superconducting compound Sn.₇₅Eu.₂₅Mo₆S₈. The spectra at all temperatures consist of an ... -
Mössbauer study of the coexisting amphiboles: grunerite-ferroactinolite and cummingtonite-actinolite
(Northern Illinois University, 1980)Mössbauer parameters of two pairs of coexisting amphiboles were obtained at two different temperatures: room temperature (295 K) and liquid nitrogen temperature (77 K). Ratios of the absorption areas in the Mössbaner spectra ... -
Mössbauer study of two hornblendes and greenalite
(Northern Illinois University, 1981)⁵⁷Fe Mössbauer spectra have been recorded at room temperature and liquid nitrogen temperature for greenalite from Gyr greenstone belts of Yilgran Block, Western Australia and two hornblendes from the Sierra Nevada Batholith, ... -
Mujeres de ojos grandes by Angeles Mastretta : postmodern feminism
(Northern Illinois University, 1993)The diversity of postmodernist literature reflects the rapidly changing paradigms within our society today. The current Latin American narrative has various forms, themes, styles and manners. Many times the theme is ordinary ...
