噪声水平与性格特点对人操作者不同难度跟踪作业工效的影响

通过计算机模拟，研究了８名被试在５７、８０、９０、９５、１００ｄＢ（Ａ）五种噪声水平下的跟踪作业工效，作业设置三种难度，其被控对象分别为：一阶环节０．５／Ｓ和０．５／Ｓ（０．２５Ｓ＋１）、二阶环节０．５／Ｓ＾２，实验前对被试进行１６ＰＦ心理素质测定。结果表明：８０ｄＢ（Ａ）噪声环境下三种难度的跟踪工效均优于基佗几种噪声水平下的结果，但差异不具有显著意义，操作者性格特点对高难度踊跃作业工效有显著的曩     

The prognostic significance of mediastinal bulk in patients with stage IA-IVB Hodgkin's disease: a report from the Manchester Lymphoma Group

Three hundred and two previously untreated patients with Stage IA-IVB Hodgkin's disease were reviewed to determine the prognostic significance of mediastinal involvement. Mediastinal bulk disease was defined as either a maximal mediastinal width of 7.5 cm or more, or a ratio of the maximum width of mediastinal disease to the maximum chest diameter of greater than or equal to 0.33, or a ratio of the maximum width of mediastinal disease to the chest diameter at T5-T6 greater than or equal to 0.33, or as an area of mediastinal disease greater than or equal to 100 cm2. Bulk disease outside the chest was defined as a mass of lymph nodes measuring 5 cm or more in any axis. The presence of mediastinal bulk disease was of adverse prognostic significance for remission duration and survival in patients with Stage IA-IIB Hodgkin's disease, but for patients with more advanced disease the effect of mediastinal bulk on remission duration and survival was not statistically significant. The mediastinal bulk variable which most significantly related to prognosis was the ratio of the maximum mediastinal disease to the chest diameter at T5-T6.