The solar heating and cooling commercial demonstration program: Some early problems and results

The activities of the Marshall Space Flight Center of the National Aeronautics and Space Administration in the technical evaluation of proposals, contracts definitions, and program management details are defined and discussed. The significant problems were summarized in both technical and management aspects of the program. It was concluded that the program has significantly stimulated additional solar effort by the program participants. It was also concluded that the use of conventional construction industry organization with design/competitive bid procedures and standards has maintained a cost effective program

A system for aerodynamic design and analysis of supersonic aircraft. Part 3: Computer program description

The computer program documentation for the design and analysis of supersonic configurations is presented. Schematics and block diagrams of the major program structure, together with subroutine descriptions for each module are included

Aerodynamic design and analysis system for supersonic aircraft. Part 2: User's manual

An integrated system of computer programs for supersonic configurations is described. An explanation of system usage, the input definitions, and example output are included. For Part 1, see N75-18185; for Part 3, see N75-18186

A computational system for aerodynamic design and analysis of supersonic aircraft. Part 2: User's manual

An integrated system of computer programs was developed for the design and analysis of supersonic configurations. The system uses linearized theory methods for the calculation of surface pressures and supersonic area rule concepts in combination with linearized theory for calculation of aerodynamic force coefficients. Interactive graphics are optional at the user's request. This user's manual contains a description of the system, an explanation of its usage, the input definition, and example output

A computational system for aerodynamic design and analysis of supersonic aircraft. Part 3: Computer program description

For abstract, see Vol. 1

Insulation for cryogenic tanks has reduced thickness and weight

Dual seal insulation, consisting of an inner layer of sealed-cell Mylar honeycomb core and an outer helium purge channel of fiber glass reinforced phenolic honeycomb core, is used as a thin, lightweight insulation for external surfaces of cryogenic-propellant tanks

Bonding machine for forming a solar array strip

A machine is described for attaching solar cells to a flexable substrate on which printed circuitry has been deposited. The strip is fed through: (1) a station in which solar cells are elevated into engagement with solder pads for the printed circuitry and thereafter heated by an infrared lamp; (2) a station at which flux and solder residue is removed; (3) a station at which electrical performance of the soldered cells is determined; (4) a station at which an encapsulating resin is deposited on the cells; (5) a station at which the encapsulated solar cells are examined for electrical performance; and (6) a final station at which the resulting array is wound on a takeup drum

Hysterectomy, endometrial destruction, and levonorgestrel releasing intrauterine system (Mirena) for heavy menstrual bleeding : systematic review and meta-analysis of data from individual patients

Peer reviewedPublisher PD

Landlord-Tenant Revolution Redux: New York’s “RAD” Landlord-Tenant Law Revisions

In June 2019, New York adopted the Housing Stability and Tenant Protection Act of 2019 (HSTPA), 2019 N.Y Laws ch. 36, amending various sections of the existing substantive and procedural laws regulating landlord-tenant relations. Calling the HSTPA “rad” suggests two things: from the perspective of housing advocates and tenants, it is “awesome” but for property owners and investors, it is concernedly “radical.” Both meanings are apt because of the sweeping changes the HSTPA makes to the traditional landlord-tenant dynamic--from tenancy creation to perpetual rent controls to post-judgment relief, creating what might be described as a “statutory lease.” Both sides of the dynamic might even describe the HSTPA as a revolution: the housing advocates and tenants, who see it as a much-needed adjustment in the balance of the fortunes of those needing accessible housing and those profit-seekers in the business of providing it; and the owners and investors, who believe it takes away well-established rights and expectations of ownership. This legislation marks the second revolution in landlord-tenant law, the first having started in the 1950s and culminating in a decided movement away from the classic paradigm in which all the rights resided in the landlords and all the burdens were placed on the tenant, to one more centered between the parties. Although this second revolution emerging in New York and a few other jurisdictions at first take seems promising, however, it may yet cause losses for tenants as a socioeconomic cohort

Hysterectomy, endometrial ablation, and levonorgestrel releasing intrauterine system (Mirena) for treatment of heavy menstrual bleeding : cost effectiveness analysis

Peer reviewedPublisher PD