RESUMO
This paper presents two linked empirical studies focused on uncertainty visualization. The experiments are framed from two conceptual perspectives. First, a typology of uncertainty is used to delineate kinds of uncertainty matched with space, time, and attribute components of data. Second, concepts from visual semiotics are applied to characterize the kind of visual signification that is appropriate for representing those different categories of uncertainty. This framework guided the two experiments reported here. The first addresses representation intuitiveness, considering both visual variables and iconicity of representation. The second addresses relative performance of the most intuitive abstract and iconic representations of uncertainty on a map reading task. Combined results suggest initial guidelines for representing uncertainty and discussion focuses on practical applicability of results.
RESUMO
Cross polarization from 31P to 77Se is demonstrated in beta-P4Se3. This material, an inorganic glass, is readily synthesized from the elements and serves as a convenient sample for setting the Hartmann-Hahn condition.
Assuntos
Vidro/química , Espectroscopia de Ressonância Magnética/métodos , Fósforo/química , Selênio/química , Fenômenos Químicos , Físico-Química , IsótoposRESUMO
The authors describe a technique which allows minimal radiation of the perineum while permitting delivery of a nearly homogenous radiation dose to a carcinoma involving the lower vagina and rectosigmoid colon as well as the pelvic lymph nodes.
Assuntos
Neoplasias do Colo/radioterapia , Neoplasias Retais/radioterapia , Neoplasias Vaginais/radioterapia , Feminino , Humanos , Métodos , Períneo , Dosagem Radioterapêutica , Neoplasias do Colo Sigmoide/radioterapiaRESUMO
The results of radiation therapy of 79 patients with early carcinoma of the vocal cord are reported. Nine (13%) of the 69 patients with stage I disease had local recurrence, and two (20%) of the ten patients with stage II disease had local recurrence without local node metastasis. Subsequent control of radiation failure by surgical salvage was 100%. Close follow-up of the patients after radiation therapy and biopsy of suggestive areas are emphasized for early detection of residual or recurrent tumor.
Assuntos
Carcinoma/radioterapia , Radioisótopos de Cobalto/uso terapêutico , Neoplasias Laríngeas/radioterapia , Teleterapia por Radioisótopo , Prega Vocal , Adulto , Idoso , Carcinoma/cirurgia , Seguimentos , Humanos , Neoplasias Laríngeas/cirurgia , Laringectomia , Pessoa de Meia-Idade , Recidiva Local de NeoplasiaRESUMO
Recent advances in ultrasound and computed tomography have permitted localization of orbital lesions, and sophisticated high-energy irradiation techniques facilitate improved dose distribution without significant damage to normal tissue. Three patients treated for orbital pseudotumor are discussed.
Assuntos
Neoplasias Orbitárias/radioterapia , Idoso , Feminino , Humanos , Pessoa de Meia-Idade , Neoplasias Orbitárias/diagnóstico por imagem , Neoplasias Orbitárias/patologia , Radioterapia de Alta Energia , Tomografia por Raios XRESUMO
Low dose superficial x-irradiation to the incisional site after surgical excision of a keloid prevented keloid or hypertrophic scar formation in 31 of 35 patients evaluated (88%). The clinical manifestation of keloids, physiology of wound healing, pathophysiology of keloid formation, and the radiation technique utilized are presented. This study shows that the method is well tolerated, easily administered, and efficient in inhibiting recurrence of keloid or hypertrophic scar formation.
