Creating a population-based linked health database: a new resource for health services research

Cytologically, the distinction between bronchioalveolar carcinoma and reactive/reparative processes of respiratory epithelium can be difficult. Retrospectively, we have identified 11 consecutive cases of bronchioalveolar carcinoma from the cytology files of University Missouri-Kansas City/Truman Medical Center. On average, a combined 5.71 cytologic/histologic procedures were performed before reaching a definitive diagnosis for this group. An additional seven random cases of reactive/reparative respiratory cases of adult respiratory distress syndrome patients were used as a control. Cytomorphometric analysis was performed. The mean average nuclear diameter for the carcinoma group was 13.76 microns and for the reactive/reparative group was 13.29 microns. There was no statistical difference between the two groups (paired student t test, P > .05). It appears from our data that mean nuclear diameter is not a discriminator for the cytologic distinction between bronchioalveolar carcinoma and reactive/reparative respiratory epithelium and that the accepted cytologic parameters of for bronchioalveolar carcinoma are more valid.     

Design procedures for a printed-circuit-board transmission-line transformer

A method of design is given for transmission-line transformers operating up to the gigahertz region, using printed-circuit-board spiral lines which fit inside an RM core. Results of measurements on a 2:1 transformer made to this design and which has a passband from 150 kHz to 1 GHz are given.     

Magnetic materials for integrated cores

Magnetic materials for an integrated magnetic core memory have been developed. The materials are for a storage layer about 1 μm thick and a low reluctance keeper layer. Materials investigated were Co-Ni-Fe for the storage layer and Cr-Ni-Fe for the keeper. Measurements were made ofH_{c}, B_{s}, B_{r}, lambda_{s}, S_{w}, H_{0}, and Hdisturb. Layer stress and adhesion were also measured. Special apparatus, which is described, has been developed to perform some of the measurements. Variation of properties with substrate surface, substrate temperature, and oxygen pressure during evaporation are reported.