1,516 research outputs found

    W. & G. Ricketts with Peter P. Kean, November 11, 1818

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    Reciept from W. & G. Ricketts with Peter P. Kean for $76.75 for tea and coal purchased for him and Susan Ursin Niemcewicz.https://digitalcommons.kean.edu/lhc_1810s/1108/thumbnail.jp

    Recent transonic unsteady pressure measurements at the NASA Langley Research Center

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    Four semispan wing model configurations were studied in the Transonic Dynamics Tunnel (TDT). The first model had a clipped delta planform with a circular arc airfoil, the second model had a high aspect ratio planform with a supercritical airfoil, the third model has a rectangular planform with a supercritical airfoil and the fourth model had a high aspect ratio planform with a supercritical airfoil. To generate unsteady flow, the first and third models were equipped with pitch oscillation mechanisms and the first, second and fourth models were equipped with control surface oscillation mechanisms. The fourth model was similar in planform and airfoil shape to the second model, but it is the only one of the four models that has an elastic wing structure. The unsteady pressure studies of the four models are described and some typical results for each model are presented. Comparison of selected experimental data with analytical results also are included

    Transonic steady- and unsteady-pressure measurements on a high-aspect-ratio supercritical-wing model with oscillating control surfaces

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    A supercritical wing with an aspect ratio of 10.76 and with two trailing-edge oscillating control surfaces is described. The semispan wing is instrumented with 252 static orifices and 164 in situ dynamic-pressure gages for studying the effects of control-surface position and motion on steady- and unsteady-pressures at transonic speeds. Results from initial tests conducted in the Langley Transonic Dynamics Tunnel at two Reynolds numbers are presented in tabular form

    Structural dynamic and aeroelastic considerations for hypersonic vehicles

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    The specific geometrical, structural, and operational environment characteristics of hypersonic vehicles are discussed with particular reference to aerospace plane type configurations. A discussion of the structural dynamic and aeroelastic phenomena that must be addressed for this class of vehicles is presented. These phenomena are in the aeroservothermoelasticity technical area. Some illustrative examples of recent experimental and analytical work are given. Some examples of current research are pointed out

    Pilot Open Case Series of Voice over Internet Protocol-Delivered Assessment and Behavior Therapy for Chronic Tic Disorders

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    Comprehensive Behavioral Intervention for Tics (CBIT) is an efficacious treatment for children with chronic tic disorders (CTDs). Nevertheless, many families of children with CTDs are unable to access CBIT due to a lack of adequately trained treatment providers, time commitment, and travel distance. This study established the interrater reliability between in-person and Voice over Internet Protocol (VoIP) administrations of the Yale Global Tic Severity Scale (YGTSS), and examined the preliminary efficacy, feasibility, and acceptability of VoIP-delivered CBIT for reducing tics in children with CTDs in an open case series. Across in-person and VoIP administrations of the YGTSS, results showed mean agreement of 91%, 96%, and 95% for motor, phonic, and total tic severity subscales. In the pilot feasibility study, 4 children received 8 weekly sessions of CBIT via VoIP and were assessed at pre- and posttreatment by an independent evaluator. Results showed a 29.44% decrease in clinician-rated tic severity from pre- to posttreatment on the YGTSS. Two of the 4 patients were considered treatment responders at posttreatment, using Clinical Global Impressions–Improvement ratings. Therapeutic alliance, parent and child treatment satisfaction, and videoconferencing satisfaction ratings were high. CBIT was considered feasible to implement via VoIP, although further testing is recommended

    Agricultural Education and Mathematics Performance Among Secondary Students

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    The purpose of this study was to determine the effects of agricultural education, FFA involvement, and SAE participation on the mathematics performance of secondary students. The study explored these factors using an ex post facto research design. Respondents in the study were secondary students enrolled in Agricultural Education program (N=80) and non-agricultural education students (N=59). Results revealed that agricultural education students had a higher mathematics mean score (M=12.15, SD=4.61) than non-agricultural education students (M=10.67, SD=3.63). There were positive statistically significant differences between mathematics performance of the students and their FFA involvement as well as SAE participation

    Transonic unsteady airloads on an energy efficient transport wing with oscillating control surfaces

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    An aspect ratio 10.8 supercritical wing with oscillating control surfaces is described. The wing is instrumental with 252 static orifices and 164 in situ dynamic pressure transducers for studying the effects of control surface deflection on steady and unsteady pressures at transonic speeds. Results from initial wind tunnel tests conducted in the Langley Transonic Dynamics Tunnel are discussed. Unsteady pressure results are presented for two trailing edge control surfaces oscillating separately at the design Mach number of 0.78. Some experimental results are compared with analytical results obtained by using linear lifting surface theory

    Science, Math, Social Studies, and Language Arts Achievement of High School Students in Complete Programs of Agriscience Education

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    The purpose of this descriptive and comparative study was to describe the academic achievement of FFA (Future Farmers of America) members in a complete program of agriscience at Jackson County Comprehensive High School (JCCHS). A secondary purpose was to compare science, math, social studies, and language arts achievement of senior agriscience students/FFA members to the achievement of all seniors at JCCHS. The findings indicate that senior agriscience students/FFA members had a higher percentage of students achieving at the highest level (Pass Plus) of Language Arts on the GHSGT (Georgia High School Graduation Test) than the remaining student population at JCCHS. Senior agriscience students/FFA members also had a higher passing rate in comparison to all seniors at JCCHS on the social studies portion of the standardized test. The researchers postulate that further research needs to be conducted to identify the correlations between agriscience participation and performance on language arts and social studies standardized tests – areas where little or no research has been conducted. The researchers also recommend that other public school systems perform similar studies to determine the impact of secondary agriscience programs on student performance

    Cooperating Teachers’ Perceptions of Pedagogical Importance, Competence, and Programmatic Need: A Frontline Assessment of Agricultural Student Teachers

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    The purpose of this descriptive study was to determine, as witnessed by cooperating teachers, what learning gaps student teachers brought to the student teaching experience “Supervision of student teachers during student teaching is a very important exercise in teacher training” (Thobega & Miller, 2008, p. 65)..Cooperating teachers spend 10 plus weeks observing student teachers of agricultural education in [state]. One may argue that the cooperating teacher is the best judge of success when looking at the student teacher. Cooperating teachers believed using computers and multimedia in classroom teaching was a strength student teachers possessed. The cooperating teachers felt that the major weaknesses included conducting parent-teacher conferences and adult programs. The findings of this study also indicate that the pre-service teachers need additional preparation in developing teaching skills in managing student behavior problems, motivating students to learn, teaching students to think critically and creatively, and conducting parent-teacher conferences
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