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Elsie Rockwell 《History of education》2020,49(4):536-552
ABSTRACT This article explores the history of school gardens in educational projects linked to four scholars at Teachers College (Bigelow, Dewey, Kilpatrick and Carney) during the early twentieth century. It concludes that gardening activities were designed primarily for urban children who lacked experience in farming. The role of gardening in experimental schools in the North is compared with proposals for rural schools in the Midwest and for segregated schools for Black youth in the South. Various logics are identified by analysing the educational arguments used to promote or dismiss school gardening, and the rationales for educating or retaining a certain type of labour force. A combination of these arguments appears in Dewey’s vindication of the emergency production of foodstuffs during the First World War. The different logics point to the paradox connecting the themes of a ‘return to nature’ and ‘love of labour’ as constants in the school gardening discourse. 相似文献
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In certain arteries the flow rate of blood can now be quantified by a non-invasive technique based on a newly developed ultrasound velocity profile meter. Clinical applications of this technique indicate that a reliable mathematical model of the circulatory system would facilitate the identification of pathologic patterns of flow rate and the corresponding possible causes. A relatively simple law for the viscoelastic behavior of arterial conduits is hypothesized and its influence on the phasis variations of pressure and flow examined with the aid of the method of characteristics. To test the feasibility of this model, its predictions of the attenuation and dispersion of small sinusoidal pressure waves are compared with data obtained in animal experiments. The results show good agreement and verify the significance of taper in reducing the attenuation of waves propagating towards the periphery and conversely increasing the damping of waves moving towards the heart. Beside this the natural pressure and flow pulses generated by the heart appear to be attenuated in a realistic manner: they no longer exhibit the somewhat exaggerated peaking predicted by the theoretical model when the viscoelasticity of the vessel wall is neglected. 相似文献
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Elsie Rockwell 《Paedagogica Historica: International Journal of the History of Education》2014,50(6):797-804
This essay traces recent developments in Mexican history of education in the light of trends in the field and publication in Paedagogica Historica. 相似文献
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Leo L. Rockwell 《College Teaching》2013,61(1):17-18
Faculty workload is based on the amount of time spent on teaching, research, and service. The workload varies according to institutional focus, teaching field, type of course, course level, and instructional format. Compared with traditional face-to-face courses, online courses require a disproportionate investment of time and effort by faculty, necessitating special consideration when calculating faculty workload. The authors examine the workload for faculty teaching online courses in community colleges, specifically, the number of online classes taught per semester, class sizes for online courses, incentives for online instructors and how the workload for online instructors is calculated. Results indicate inconsistent practices within and between institutions; the workload for online instructors based on class sizes is less than, equal to, or more than that of faculty teaching face-to-face courses. Further investigations into common practices at other institutions and dialogue between administrators and faculty to discuss workload issues are recommended. 相似文献
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Patricia Rockwell David B. Buller Judee K. Burgoon 《Communication Research Reports》2013,30(4):451-459
This study examined the nature of deceptive vocal behavior in interactive situations. Data from an earlier study were used to conduct a detailed analysis of vocal features of deceptive speech. Vocal samples were analyzed perceptually and acoustically. Of three categories examined (time, frequency, and intensity), the time variables best discriminated between truthful and deceptive speakers, with deceivers exhibiting shorter message length, longer response latencies, slower tempo, and less fluency than truthtellers. Deceivers also evidenced increased intensity range, increased pitch variance, and less pleasant vocal quality than truthtellers. 相似文献
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