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[en] The effects of ionizing radiation on smell acuity were assessed in 12 patients in whom the olfactory mucosa was exposed to radiation in the course of treatment for nasopharyngeal carcinoma or pituitary adenoma. Olfactory detection thresholds for two odorants (amyl acetate and eugenol) were determined before the start of radiation therapy, within a week of termination of therapy, and 1, 3, and 6 months later. The results show clearly that smell acuity is profoundly affected by therapeutic irradiation. Thresholds had increased in all 12 patients by the end of treatment and were still high one month later. Varying degrees of recovery were noted in most patients three to six months after cessation of treatment. The fate of the sense of smell deserves more attention when considering the disability caused by irradiation to certain head and neck tumors
[en] Bijective linear transformations of the matrix algebra over an arbitrary field that preserve simultaneous diagonalizability are characterized. This result is used for the characterization of bijective linear monotone transformations . Bibliography: 28 titles.
[en] Differential cross sections for the inelastic scattering of 66.5 MeV protons from /sup 148/Sm and /sup 154/Sm were measured over an angular range 80--900 (c.m.). For /sup 148/Sm, data were obtained for the ground and the first excited states. Using the first-order vibrational model, coupled-channel calculations reproduce both states rather well. Data for the J/sup π/ = 0+--6+ members of the roatational band of /sup 154/Sm were also obtained. /sup 154/Sm was treated as a rigid rotor and coupled-channel calculations were carried out in terms of the deformation of the /sup 148/Sm spherical optical-model potential. Deformation parameters β2, β4, and β6 have been extracted. Contrary to results of (α,α')scattering at 50 MeV and proton inelastic scattering at 800 MeV, the data show preference for a positive value of β6, in agreement with (p,p') studies at 35 and 135 MeV and the calculations of Nilsson et al
[en] The paper is devoted to studying the orthogonality graph of the matrix ring over a skew field. It is shown that for n ≥ 3 and an arbitrary skew field 𝔻, the orthogonality graph of the ring Mn(𝔻) of n × n matrices over a skew field 𝔻 is connected and has diameter 4. If n = 2, then the graph of the ring Mn(𝔻) is a disjoint union of connected components of diameters 1 and 2. As a corollary, the corresponding results on the orthogonality graphs of simple Artinian rings are obtained.