thomas nelson | Columbus State Community College (original) (raw)

Papers by thomas nelson

Clinical Orthopaedics and Related Research, 1996

A technique of computed tomography with intravenous contrast has proven useful in the differentia... more A technique of computed tomography with intravenous contrast has proven useful in the differentiation between osteoid osteoma and other similar appearing lucent lesions of bone in 6 cases. The clinical evaluation of benign appearing radiolucent lesions of long bones has been greatly improved by the use of modern imaging techniques. The differential diagnosis often is narrowed to osteoid osteoma and osteomyelitis based on plain radiographs, computed tomography, or magnetic resonance imaging. The enhancement of the lucent center of the lesion was plotted against time. The rapid uptake of contrast medium by the osteoid osteoma was in sharp contrast to the much slower enhancement in osteomyelitis. The establishment of a preoperative diagnosis enabled the surgeon to excise the lesion without a biopsy. Histologic review verified the preoperative diagnosis in all cases.

Journal of Experimental Psychology-learning Memory and Cognition, 1988

This research explored the possibility that a metacognitive comrol process (namely, the allocatio... more This research explored the possibility that a metacognitive comrol process (namely, the allocation of self-paced study time) might be affected by the output from metacognitive monitoring processes (i.e., ease-of-learning and/or feeling-of-knowing judgments). In three experiments, university undergraduates rece/ved instructions that emphasized either accuracy of learning or spe~ of learning. The major findings were: (a) ease-of-learning judgments and feeling-of-knowing judgments are reliably related to study-time allocation, win more self-paced study time being allocated to the supposedly more difficult items; (b) even when instructed to master every item and when allowed unlimited study time to do so, people terminate study before learning is completed; and (c) large increases in self-paced study time can yield little or no increase in the subsequent likelihood of recall (the "labor-in-vain effect"). Implications are drawn for a model of the interplay between metaeognifive monitoring processes and metacognitive control processes.

Journal of Politics, 1996

Page 1. Issue Frames and Group-Centrism in American Public Opinion Thomas E. Nelson The Ohio Stat... more Page 1. Issue Frames and Group-Centrism in American Public Opinion Thomas E. Nelson The Ohio State University Donald R. Kinder University of Michigan Public opinion on government policy is group-centric: that is, strongly ...

Bulletin of The American Meteorological Society, 2003

Thunderstorms occasionally produce upward discharges, called blue jets and gigantic jets, that pr... more Thunderstorms occasionally produce upward discharges, called blue jets and gigantic jets, that propagate out of the storm top towards or up to the ionosphere 1-4 . Whereas the various types of intracloud and cloud-to-ground lightning are reasonably well understood, the cause and nature of upward discharges remains a mystery. Here, we present a combination of observational and modelling results that indicate two principal ways in which upward discharges can be produced. The modelling indicates that blue jets occur as a result of electrical breakdown between the upper storm charge and the screening charge attracted to the cloud top; they are predicted to occur 5-10 s or less after a cloud-to-ground or intracloud discharge produces a sudden charge imbalance in the storm. An observation is presented of an upward discharge that supports this basic mechanism. In contrast, we find that gigantic jets begin as a normal intracloud discharge between dominant mid-level charge and a screeningdepleted upper-level charge, that continues to propagate out of the top of the storm. Observational support for this mechanism comes from similarity with 'bolt-from-the-blue' discharges 5 and from data on the polarity of gigantic jets 6 . We conclude that upward discharges are analogous to cloud-to-ground lightning. Our explanation provides a unifying view of how lightning escapes from a thundercloud.

Journal of Phycology, 1966