4,722 research outputs found
Linear circuit analysis program for IBM 1620 Monitor 2, 1311/1443 data processing system /CIRCS/
CIRCS is modification of IBSNAP Circuit Analysis Program, for use on smaller systems. This data processing system retains the basic dc, transient analysis, and FORTRAN 2 formats. It can be used on the IBM 1620/1311 Monitor I Mod 5 system, and solves a linear network containing 15 nodes and 45 branches
Evaluation of a computer-generated perspective tunnel display for flight path following
The display was evaluated by monitoring pilot performance in a fixed base simulator with the vehicle dynamics of a CH-47 tandem rotor helicopter. Superposition of the predicted future vehicle position on the tunnel image was also investigated to determine whether, and to what extent, it contributes to better system performance (the best predicted future vehicle position was sought). Three types of simulator experiments were conducted: following a desired trajectory in the presence of disturbances; entering the trajectory from a random position, outside the trajectory; detecting and correcting failures in automatic flight. The tunnel display with superimposed predictor/director symbols was shown to be a very successful combination, which outperformed the other two displays in all three experiments. A prediction time of 4 to 7 sec. was found to optimize trajectory tracking for the given vehicle dynamics and flight condition. Pilot acceptance of the tunnel plus predictor/director display was found to be favorable and the time the pilot needed for familiarization with the display was found to be relatively short
An assessment of advanced displays and controls technology applicable to future space transportation systems
The topic of advanced display and control technology is addressed along with the major objectives of this technology, the current state of the art, major accomplishments, research programs and facilities, future trends, technology issues, space transportation systems applications and projected technology readiness for those applications. The holes that may exist between the technology needs of the transportation systems versus the research that is currently under way are addressed, and cultural changes that might facilitate the incorporation of these advanced technologies into future space transportation systems are recommended. Some of the objectives are to reduce life cycle costs, improve reliability and fault tolerance, use of standards for the incorporation of advancing technology, and reduction of weight, volume and power. Pilot workload can be reduced and the pilot's situational awareness can be improved, which would result in improved flight safety and operating efficiency. This could be accomplished through the use of integrated, electronic pictorial displays, consolidated controls, artificial intelligence, and human centered automation tools. The Orbiter Glass Cockpit Display is an example examined
Thermal infrared research: Where are we now?
The use of infrared temperatures in agriculture and hydrology is based on the energy balance equation which is used to estimate evapotranspiration and crop stress over small areas within a field as well as large areas. For its full utilization, this measurement must be combined with other spectral data collected at a time resolution sufficient to detect changes in the agricultural or hydrological systems and at a spatial resolution with enough detail to sample within individual fields. The most stringent requirement is that the data be readily available to the user. The spatial resolution necessary for IR measurements to be incorporated into evapotranspiration models to accurately estimate field and regional transpiration or measure crop stress; methods to estimate crop stress and yield over large areas and different cultivars within a species; the temporal resolution adequate for detecting crop stress or inclusion in evapotranspiration models; and ancillary parameters for estimating thermal IR measurements must be investigated
Multilevel measurements of surface temperature over undulating terrain planted to barley
A ground and aircraft program was conducted to extend ground based methods for measuring soil moisture and crop water stress to aircraft and satellite altitudes. A 260ha agricultural field in California was used over the 1977-78 growing season. For cloud free days ground based temperature measurements over bare soil were related to soil moisture content. Water stress resulted from too much water, not from lack of it, as was expected. A theoretical examination of the canopy air temperature difference as affected by vapor pressure deficit and net radiation was developed. This analysis shows why surface temperatures delineate crop water stress under conditions of low humidity, but not under high humidity conditions. Multilevel temperatures acquired from the ground, low and high altitude aircraft, and the Heat Capacity Mapping Mission (HCMM) spacecraft were compared for two day and one night overpasses. The U-2 and low altitude temperatures were within 0.5 C. The HCMM data were analyzed using both the pre- and post-launch calibrations, with the former being considerably closer in agreement with the aircraft data than the latter
The Hocus Pocus of Martin Gardner A Review of Martin Gardner’s Undiluted Hocus-Pocus: The Autobiography of Martin Gardner
I have always enjoyed games, especially when incorporated into the classroom. I can still remember the game my fifth-grade teachers had us play to explore colonizing a new world. One of the most impactful games I’ve played is SET®, which has become a go-to for mathematics teachers as a means for exploring geometry, combinatorics, probability, statistics, and vector spaces (Larson Quinn et al., 1999; Waddell Jr., 2017). I first learned the game in the seventh grade and continue to play the game today. How many sets do you see in Figure 1
TRUSTS - TORT LIABILITY OF TRUSTEE IN HIS REPRESENTATIVE CAPACITY
Plaintiff brought suit to recover damages for injuries allegedly sustained because of the unsafe condition of a hotel building owned and operated by the defendant trustee. The trustee was an insolvent bank and trust company in the hands of the state superintendent of banks, who was also joined as defendant. The prayer was for a judgment against the defendants in their fiduciary capacity toward the trust. On appeal of the lower court\u27s judgment sustaining defendants\u27 demurrer, held, that the trustee could be sued in his representative capacity. Carey v. Squire, 63 Ohio App. 476, 27 N. E. (2d) 175 (1939)
LIMITATION OF ACTIONS - LANDLORD AND TENANT - INSTALLMENT RENT PAYMENTS
Defendant rented a farm from plaintiff under a written lease for five years and then held over under the same terms by an oral agreement. Plaintiff brought an action for arrearages in rent payments, claiming that the four-year statute of limitations on open book accounts was applicable, but defendant alleged that the two-year statute on oral contracts barred the action. Held, the two-year statute was applicable and barred the action. When rent is payable in specified monthly sums, the statute runs from the respective date when each installment falls due. Tillson v. Peters, 41 Cal. App. (2d) 671, 107 P. (2d) 434 (1940)
CORPORATIONS - CLOSE CORPORATIONS - METHODS OF RETAINING OWNERSHIP OF STOCK IN SURVIVING STOCKHOLDERS WHEN ONE STOCKHOLDER DIES
The close corporation is generally formed by a small group who take an active part in the business and whose participation is essential to the successful operation of the venture. Thus, a partnership may decide that the corporate form will more effectively protect the interests of its members, or a small number of people interested in the same enterprise may incorporate in order to limit their individual liability in the common endeavor. Whatever the reason for the use of the corporate entity, the active participation of each stockholder is probably of vital importance to the financial welfare of all. To such a group the death of a stockholder is a catastrophe of the greatest magnitude. Not only do the surviving stockholders lose the effort and skill of the deceased in carrying out his share of the duties connected with the venture, but the corporation\u27s very existence is threatened by the possibility that the stock will fall into the hands of someone with little interest in, if not actual hostility to, the corporation and its management. How can the business be managed successfully when the members of the deceased\u27s family or his legatees, who know nothing of the problems of the business, must be accepted as principal stockholders and paid dividends although they contribute nothing to the success of the enterprise? It is the purpose of this comment to suggest an answer to the problem presented by pointing out several possible methods by which the shares of a deceased stockholder can be retained by those surviving. The allied problem of preventing the stockholder from alienating his stock to a stranger during his life will be considered only incidentally
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