Impedance of a sphere oscillating in an elastic medium with and without slip

The dynamic impedance of a sphere oscillating in an elastic medium is considered. Oestreicher's formula for the impedance of a sphere bonded to the surrounding medium can be expressed simply in terms of three lumped impedances associated with the displaced mass and the longitudinal and transverse waves. If the surface of the sphere slips while the normal velocity remains continuous, the impedance formula is modified by adjusting the definition of the transverse impedance to include the interfacial impedance.Comment: 10 pages, 2 figure

A room with a view:window images and 'open immanence' in the writings of adolphe retté and G.K. chesterton

Adolphe Retté and G.K. Chesterton often use the image of a window, a paradox given the widespread view that Catholic writers are usually closed minded. This article asks whether Charles Taylor's philosophy of the individual could explain this paradox more satisfactorily. Chesterton's windows express a realist epistemology, while Retté's windows express the illumination of faith. The themacity of the subject in their writings, however, shows that their windows give expression to Taylor's 'open immanence', rather than Taylorian 'porosity'. Their reactionary character can be interpreted as a kind of Taylorian 'buffering' which is necessary for believing writers resisting secularity

Music and You

After you have selected the best phonograph that you can afford, preferably one with three speeds (78 rpm, 45 rpm, and 33½ rpm), you are ready to begin your home record library. Long-playing records withstand rougher treatment than do the 78\u27s, are easier to store, and will play up to thirty-two minutes per side without interruptions. They\u27re not literally unbreakable, but they are tough

Réflexions pour 1985:a study in the vernacular of progressive compliance

"Réflexions pour 1985", a prospective report published in 1964, envisaged what France might look like in 1985. This article argues that the blend of "probable" and "desirable" in its imagined vision of the future reveals an agenda of enforcing social compliance with its techno-scientific assumptions. To test such an assessment of the text, this article offers a study of the shaping factors and shaping actors of the report, before analysing the language of the report itself

THE EFFECTS OF VIRTUAL LABORATORY ACTIVITIES ON SCIENCE LEARNING

The purpose of this study was to observe the impact of technology on improving science achievement in Elementary students. In specific, this study examined the effects of virtual science laboratory activities on the science learning of 20 African American students in grades four. Using a quasi-experimental design, students in grades four, were randomly assigned to a treatment (virtual labs) or comparison (traditional hands-on labs) group. Ten students participated in treatment group and ten students participated in the comparison group. The students conducted science experiments for 50 minutes, one time a week, for 8 weeks. Both groups were given a pretest and posttest using the Terra Nova 3 Survey Assessment in Science grade 4 and students’ motivation toward science learning (SMTSL) questionnaire. Gains between the pretest and posttest scores were analyzed for each instrument using the Mann Whitney U test. The New York State Intermediate Level Science Assessment Test (ILSAT) for grade 4 was also administered to the treatment and comparison group and analyzed using the Mann Whitney U test. Students in the treatment group did not show any significant gains in scores, on the Terra Nova 3 Survey Assessment in Science for grade 4 and SMTSL, respectively, than students in the comparison group. Students in the treatment group for the ILSAT showed a significant higher score than students in the comparison group. In conclusion, the intervention had a significant impact on the ILSAT score gains. The limitations of the study and implications for future research were discussed

Weekly Newspaper Editors\u27 Acceptance and Use of 1963 State 4-H Contest Pictures and Captions Supplied by State and Local Extension Service Sources

The 4-H program receives considerable attention in event attendance as well as in publicity all through the state 4-H contests held during the South Dakota State Fair. Publicity in the form of news releases (and more recently news photographs with captions) has been provided to the local news media outlets by the state Extension Editorial Department. Publicity methods have changed during the course of more than fifteen state 4-H contests covered by this department from the daily roundup story for each of the daily newspapers in the late 1940’s to the news photographs and captions in the 1950’s and 1960’2 for the dailies and for television. Not until 1958 was the publicity program changed to include the weekly newspapers on the mailing list to receive news photographs and captions of their local state 4-H contest winners. Although engraving services were available for the weeklies, the editor’s interests in the state 4-H pictures ran from “very interested” to “no interest at all.” Those who were interested were quick to emphasize that they would use only “local” pictures in their publications. After it was established that local pictures could be engraved in time for the next issues of the weeklies, the editorial staff agreed to the increased effort of providing news photographs to the weeklies in addition to the dailies and to television. More than one hundred different scenes were ordinarily photographed during a state 4-H contest. In trying to find ways to increase the effectiveness of the state 4-H contest publicity program, the editorial staff, in 1960, decided to place a limit on the number of pictures that a weekly would receive. Baus agrees with this assumption. “There is one formula for success in getting material published in the small town press. While this is difficult because of the number of such newspapers, it is the only way to do an effective job. In an effort of find more effective methods of supplying state 4-H contest publicity to the weeklies, two hypotheses are offered in the paper