Abstract: A reusable first stage (100) includes a booster engine system (102) for providing thrust during launch, a structural assembly (108), canards (118), jet engines (122), wings (124), elevons (126) and retractable landing gear (130). After separation, the jet engines (122) and aerodynamic control surfaces are used to return the first stage to a landing strip. The booster system (102) includes a structurally stable outer skin system such as an isogrid structure. The first stage (100) is thereby adapted for controlled descent and recovery with minimal structural enhancement or added mass.

Abstract: A single basal growth medium for receiving various substrates for the purpose of rapid identification of any species of non-fermentative Gram-negative bacilli (NFB), wherein the medium is low in organic nitrogen but is supplemented with inorganic nitrogen from an ammonium ion source to enhance NFB growth. The medium also serves to identify members of the family Enterobacteriaceae, cytochrome oxidase positive fermenters, Gram-positive bacilli, Gram-positive cocci, and anaerobes.

Abstract: Automated pulmonary function testing apparatus includes a spirometer responsive to the breathing efforts of a patient for producing electrical signals which vary in accordance with volumes of breathed gas and central processing means for calculating one or more pulmonary function parameters associated with such volumes. Display means are adapted to visually display information supplied from the central processing means to an operator and/or a patient under test. In addition, keyboard means coupled to the central processing means are also provided such that upon operation of a particular key, tests may be selected and volumes or other calculated parameters may be visually displayed and/or printed on a permanent record medium.