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Search Results: 1 - 10 of 401580 matches for " Tatana M. Olson "
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The Effectiveness of Web-Based Instruction: An Initial Inquiry
Tatana M. Olson,Robert A. Wisher
International Review of Research in Open and Distance Learning , 2002,
Abstract: As the use of Web-based instruction increases in the educational and training domains, many people have recognized the importance of evaluating its effects on student outcomes such as learning, performance, and satisfaction. Often, these results are compared to those of conventional classroom instruction in order to determine which method is “better.” However, major differences in technology and presentation rather than instructional content can obscure the true relationship between Web-based instruction and these outcomes. Computer-based instruction (CBI), with more features similar to Web-based instruction, may be a more appropriate benchmark than conventional classroom instruction. Furthermore, there is little consensus as to what variables should be examined or what measures of learning are the most appropriate, making comparisons between studies difficult and inconclusive. In this article, we review the historical findings of CBI as an appropriate benchmark to Web-based instruction. In addition, we review 47 reports of evaluations of Web-based courses in higher education published between 1996 and 2002. A tabulation of the documented findings into eight characteristics is offered, along with our assessments of the experimental designs, effect sizes, and the degree to which the evaluations incorporated features unique to Web-based instruction.
Treatment of Vasculogenic Erectile Dysfunction with Piezowave2 Device. Application of Low Intensity Shockwaves Using Novel Linear Shockwave Tissue Coverage (LSTC-ED®) Technique. A Prospective, Multicentric, Placebo-Controlled Study  [PDF]
Igor Motil, Ivan Kubis, Tatana Sramkova
Advances in Sexual Medicine (ASM) , 2016, DOI: 10.4236/asm.2016.62002
Abstract: Low intensity shockwave (LiSW) treatment is known to improve revascularization. The method has been evaluated and is used to treat vasculogenic erectile dysfunction (ED). The present study aimed to demonstrate the efficacy of a linear focused piezoelectric shockwave device (Richard Wolf/ELvationPiezowave2) to treat patients with vasculogenic ED using a novel linear shockwave tissue coverage LSTC-ED® technique. A total of 75 patients were treated using the Piezowave2 device and the LSTC-ED® technique. Patients’ erectile function was evaluated using the modified IIEF-5 (International Index of Erectile Function) scale at the beginning of treatment and at 1 month post treatment; patients were additionally questioned using our own Treatment Satisfaction Questionnaire (TSQ). The study also included a group of 50 patients treated by placebo; the outcomes of both groups were compared. The average IIEF-5 score of patients in the treatment group increased from 14.4 at baseline to 18.6 at 1 month post treatment. According to the IIEF-5 scale, treatment was successful in 81.33% of patients (61/75). According to the Treatment Satisfaction Questionnaire (answers 1 to 3 of the TSQ), treatment was successful in 77.3% of patients (58/75). In the placebo group of 50 patients only 5 patients showed an improvement based on IIEF score, and 8 reported an improvement based on their answers to the TSQ. No significant adverse effects were observed during treatment or in the follow-up period. The
A note on the homomorphism theorem for hemirings
D. M. Olson
International Journal of Mathematics and Mathematical Sciences , 1978, DOI: 10.1155/s0161171278000447
Abstract: The fundamental homomorphism theorem for rings is not generally applicable in hemiring theory. In this paper, we show that for the class of N-homomorphism of hemirings the fundamental theorem is valid. In addition, the concept of N-homomorphism is used to prove that every hereditarily semisubtractive hemiring is of type (K).
"Driven succeeding": Eine Grounded-Action-Studie in der Erwachsenenbildung Using Grounded Action Methodology for Student Intervention—Driven Succeeding: A Grounded Action Study in Adult Education Utilización de la metodología de la acción fundamentada para el éxito de la intervención de los estudiantes: un estudio de acción fundamentada en la educación de adultos
Mitchell M. Olson
Forum : Qualitative Social Research , 2008,
Abstract: Im Rahmen einer Untersuchung mit Erwachsenen, die sich um einen Oberschulabschluss bemühten, kam eine grounded action-Methodologie (GA) zum Einsatz. Der GLASERschen Fassung der grounded theory (GT) folgend, wurden neben Beobachtungen in Klassenr umen über 50 erwachsene Student(inn)en aus Erwachsenenf rderprogrammen oder Abiturlehrg ngen interviewt. Im Rahmen dieser Anwendung wurde eine erkl rende Theorie um die Kernkategorie driven succeeding generiert, die fünf Stadien umfasste: sich einlassen, Visionen entwickeln, investieren, verstehen und reifen. In dem Beitrag wird ein überblick über die erkl rende Theorie des driven succeeding gegeben, verbunden mit Beispielen, wie eine zus tzliche operationale GA-Theorie und wie entsprechende Interventionsstrategien (SIMMONS & GREGORY 2003) in der Lehrpraxis implementiert wurden. Die grounded action-Methodology erwies sich in diesem Zusammenhang als hilfreiches Instrument, um das Handeln der Student(inn)en vorherzusagen, sinnvolle und nachhaltige Interventionen zu konzipieren und so einen systematischen Einfluss auf die Gestaltung des Lehrplans und die F rderung der Studierenden zu erm glichen. URN: urn:nbn:de:0114-fqs080193 A grounded action (GA) study was conducted investigating the area of adults attempting to achieve high school-level competencies. Using GLASERian grounded theory (GT) methodology, over 50 Adult Basic Education (ABE) and General Equivalency Diploma (GED) adult students were interviewed and observed within the classroom. Serving as the explanatory theory, a GT of driven succeeding emerged as the "core variable," which included the following five stages: embarking, visioning, investing, clicking, and ripening. An overview of the explanatory theory is presented along with examples of how the grounded action operational theory and intervention strategies (SIMMONS & GREGORY, 2003) were implemented in OLSON's educational practice. GA is found to be a useful tool for predicting student behavior, providing sustainable and meaningful intervention, and in providing a systemic impact on curriculum design and the facilitation and administration of adult learning. URN: urn:nbn:de:0114-fqs080193 Se realizó un estudio de acción fundamentada investigando el área de adultos que intentan lograr alta competencia en la educación secundaria. Utilizando la metodología de la teoría fundamentada GLASERiana, 50 adultos de educación básica y estudiantes adultos del diploma de equivalencia general, fueron entrevistados y observados en el aula. Sirviendo como teoría explicativa, una teoría fundamentada acerca de consigui
Long-Term Effects of Cover Crops on Crop Yields, Soil Organic Carbon Stocks and Sequestration  [PDF]
Kenneth Olson, Stephen A. Ebelhar, James M. Lang
Open Journal of Soil Science (OJSS) , 2014, DOI: 10.4236/ojss.2014.48030

A 12-year cover crops study on the effects on SOC sequestration, storage, retention and loss and corn and soybean yields was conducted in southern Illinois. The use of cover crops for the maintenance and restoration of soil organic carbon (SOC) and soil productivity of previously eroded soils were evaluated. No-till (NT), chisel plow (CP), and moldboard plow (MP) treatment plots with and without cover crops were established in 2001. The plot area was on sloping with a moderately well drained, eroded soil. The average annual corn and soybean yields were statistically the same for NT, CP, and MP systems with and without cover crops. By 2012, the cover crop treatments had more SOC stock than that without cover crops for the same soil layer and tillage treatment. The NT, CP, and MP treatments all sequestered SOC with cover crops. A pre-treatment SOC stock baseline for rooting zone was used to validate the finding that cover crops sequestered SOC in the topsoil, subsoil and root zone of the NT, CP and MP treatments during the 12-year study. Additional sequestered SOC was lost as a result of being transported off of the plots and retained in lower slopes, transported to the stream or released to atmosphere.

The Comets of Caroline Herschel (1750-1848), Sleuth of the Skies at Slough
Roberta J. M. Olson,Jay M. Pasachoff
Physics , 2012,
Abstract: In this paper, we discuss the work on comets of Caroline Herschel, the first female comet-hunter. After leaving Bath for the environs of Windsor Castle and eventually Slough, she discovered at least eight comets, five of which were reported in the Philosophical Transactions of the Royal Society. We consider her public image, astronomers' perceptions of her contributions, and the style of her astronomical drawings that changed with the technological developments in astronomical illustration.
Florida Turkey Nest Site Selection and Success  [PDF]
William M. Giuliano, Lauren N. Watine, John M. Olson, Mitchell Blake, Holly Ober
Natural Resources (NR) , 2016, DOI: 10.4236/nr.2016.711051
Abstract: Changing landscapes and land-use practices are altering habitat for Florida wild turkeys (Meleagris gallopavo osceola). However, an understanding of habitat determinants of nest success is lacking for this unique turkey subspecies, potentially limiting conservation success. We examined female wild turkey nest site selection and nest success at microhabitat and patch levels using logistic regression in an Information-Theoretical framework in Florida, 2008-2010. We captured and radio-equipped adult female turkeys, and followed birds to nests. Nests were monitored to document success, and habitat was measured at multiple levels at nest and random sites. Females selected nest sites in dense vegetation (i.e., increased saw palmetto cover [Serenoa repens] and higher palm stem densities) that may have provided lateral and vertical cover for concealment at the microhabitat level (i.e., area within 7 m of the nest), while selecting for a more open habitat (i.e., decreasing hardwood and conifer stem densities) at the patch level (i.e., area within 28 m of the nest). Similarly, successful nests were in more dense vegetation at the nest site (i.e., increased saw palmetto cover) in an otherwise more open habitat (i.e., lower basal area) than unsuccessful nests. Habitat management that creates patches of dense shrub vegetation such as saw palmetto within an open landscape may be best for Florida wild turkey nesting habitat and success.
Moving beyond quantity of participation in process evaluation of an intervention to prevent excessive pregnancy weight gain
Paul Keriann H,Olson Christine M
International Journal of Behavioral Nutrition and Physical Activity , 2013, DOI: 10.1186/1479-5868-10-23
Abstract: Background Few lifestyle interventions have successfully prevented excessive gestational weight gain. Understanding the program processes through which successful interventions achieve outcomes is important for the design of effective programs. The objective of this study was to evaluate the effect of the quantity and quality of participation in a healthy lifestyle intervention on risk of excessive gestational weight gain. Findings Pregnant women (N = 179) received five newsletters about weight, nutrition, and exercise plus postcards on which they were asked to set related goals and return to investigators. The quantity of participation (dose) was defined as low for returning few or some vs. high for many postcards (N = 89, 49.7%). Quality of participation was low for setting few vs. high for some or many appropriate goals (N = 92, 51.4%). Fisher’s exact tests and multivariate logistic regression were used to analyze the effect of participation variables on the proportion with excessive weight gain. Quantity and quality of participation alone were each not significantly associated with excessive gestational weight gain, while quality of participation among those with high-levels of participation approached significance (p = 0.07). The odds of gaining excessively was decreased when women had both a high quantity and quality of participation (OR = 0.04, 95% CI = 0.005, 0.30). Conclusions Both quantity and quality of participation are important program process measures in evaluations of lifestyle interventions to promote healthy weight gain during pregnancy.
Do Vortices Entangle?
C. J. Olson Reichhardt,M. B. Hastings
Physics , 2003, DOI: 10.1103/PhysRevLett.92.157002
Abstract: We propose an experiment for directly constructing and locally probing topologically entangled states of superconducting vortices which can be performed with present-day technology. Calculations using an elastic string vortex model indicate that as the pitch (the winding angle divided by the vertical distance) increases, the vortices approach each other. At values of the pitch higher than a maximum value the entangled state becomes unstable to collapse via a singularity of the model. We provide predicted experimental signatures for both vortex entanglement and vortex cutting. The local probe we propose can also be used to explore a wide range of other quantities.
Influence of Nano-Spray Dried Sodium Chloride on the Physicochemical Characteristics of Surface-Salted Cheese Crackers  [PDF]
Marvin L. Moncada, Carlos E. Astete, Cristina M. Sabliov, Douglas W. Olson, Charles A. Boeneke, Kayanush J. Aryana
Food and Nutrition Sciences (FNS) , 2017, DOI: 10.4236/fns.2017.82017
Abstract: Particle size reduction of salt to submicron range increases its surface area resulting in increased saltiness perception. The objective was to evaluate the incorporation of nano-spray dried sodium chloride on the physicochemical characteristics of surface-salted cheese crackers. The sodium chloride solution (3% w/w) was sprayed through a 4-μm nozzle with 125 L/min air flow, 38 kPa pressure, 95°C head temperature, and 90% spray to form the smallest submicrosalt particles. The cheese cracker treatments consisted of 3 different salt sizes (regular, microsalt and nano-spray dried salt) and 3 different concentrations (2%, 1.5% and 1%). The 9 (3 sizes × 3 concentrations) cheese cracker treatments were tested for salt concentration and sodium content at week 1. Water activity (aw), texture-fracturability, and color were determined at week 1 and 4 months of storage. The aw) and the L*, b*, C* and h* values in all treatments increased from 1 week to 4 months. The use of nano-spray dried salt on surface-salted cheese crackers allowed for a reduction of 25% - 50% of salt content without affecting the physicochemical attributes.
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