The growing interest in non-azeotropic refrigerant mixtures for heat pumps and appliances has led to the need for a method of analysing the refrigeration cycle properties of such mixtures. Thermodynamic property table...
详细信息
A code for probabilistic analysis of non-coherent structures is described. An input to the program is a dual fault tree description and probabilities of primary events, an output of the code is a complete nonredundant...
详细信息
Elliptical antenna beams are used for planning of direct broadcast satellite systems. In this paper concepts of the beam optimization process are described briefly. A method of plotting the optimized beam on a suitabl...
详细信息
A brief interactive microcomputer program which generates dot matrices for the analysis of primary structure homologies in [bacterial] nucleic acid sequences is presented. The program places 3 options at the disposal ...
详细信息
A brief interactive microcomputer program which generates dot matrices for the analysis of primary structure homologies in [bacterial] nucleic acid sequences is presented. The program places 3 options at the disposal of the user: search for repeated sequences, search for palindromes, and compare 2 sequences. Written in MICROSOFT (tm) BASIC, the program can be run on virtually any microcomputer with little modification.
A 3 parameter logistic model is described for the analysis of profiles of optical density vs. log dose for indirect sandwich ELISA tests in foot and mouth disease. The model describes the observed phenomenon of satura...
详细信息
A 3 parameter logistic model is described for the analysis of profiles of optical density vs. log dose for indirect sandwich ELISA tests in foot and mouth disease. The model describes the observed phenomenon of saturability with increasing dose, and its parameters can be interpreted in terms of molecular binding events. A computer program to fit the model is described. An approximate statistical test is developed which can be used to test for departures from equivalence for replicate profiles. Correlation of the optical density values to a standard reference reaction considerably improves reproducibility.
A computer program was developed which generates an outcome-coded birth file from a standard birth file and a matched birth-infant death file. This program uses only anonymous computerized vital records of the kind av...
详细信息
A computer program was developed which generates an outcome-coded birth file from a standard birth file and a matched birth-infant death file. This program uses only anonymous computerized vital records of the kind available to researchers in most states. Despite a large population (Illinois [USA] 1977 births totaled 178,728) all death records were uniquely matched with birth records, allowing creation of the desired file. Such a file permits the researcher to use a variety of standard software packages without the problems of data re-entry or the use of multiple input files. Creating this outcome-coded file is relatively inexpensive, can be done without enlisting special assistance from state vital records personnel does not require access to restricted files and greatly streamlines use of perinatal vital records for research applications, especially multivariable modeling.
Analysis and Evaluation of Perforating and Perforation Perforating and Perforation Cleanup Methods Fifty-two completions made in the Gulf of Mexico between June 1978 and May 1982 have been analyzed to evaluate three c...
详细信息
Analysis and Evaluation of Perforating and Perforation Perforating and Perforation Cleanup Methods Fifty-two completions made in the Gulf of Mexico between June 1978 and May 1982 have been analyzed to evaluate three commonly used techniques for perforating and cleaning up perforations before gravel packing. Since detailed flowing bottomhole pressure (BHP) information was not available in all cases, a method was developed to evaluate the completion efficiencies by using an inhouse computer program. This program models well performance by simultaneously solving the equations performance by simultaneously solving the equations governing fluid flow in the reservoir, the near-wellbore region, the gravel-packed perforation tunnels. and up the production tubing. The results showed that perforating production tubing. The results showed that perforating underbalanced with a tubing-conveyed casing gun yielded more efficient completions than the other two techniques. Introduction With the advent of different perforating and perforation cleanup techniques and procedures, more options are available to the production engineer when designing gravel-packed completions. The three most common techniques currently used are (1) with a casing gun on electric line and surging the perforations, (2) with a casing gun on electric line and washing the perforations, and (3) underbalanced with a tubing-conveyed casing gun. The first two techniques require perforating with the pressure differential into the formation, whereas the last technique allows the pressure differential to be into the wellbore. Recent work by Bell indicates that reverse pressure (underbalanced) perforating yields more productive perforations than do positive pressure (overbalanced) perforations than do positive pressure (overbalanced) techniques. To evaluate the three techniques, gravel-packed wells completed with each of these methods during 1978-82 were considered. All the wells in the data base were completed followin
Details are given of a microcomputer-controlled continuous flow analysis system, which has been successfully used for the determination of micronutrients in seawater on board ship. The important steps in constructing ...
详细信息
Details are given of a microcomputer-controlled continuous flow analysis system, which has been successfully used for the determination of micronutrients in seawater on board ship. The important steps in constructing the computer program to deal with the reduction of the data are discussed.
A set of computer programs which collect and analyze data on the temperature dependence of neuronal activity is described. Data on the response to thermal stimulation of cultured neurons of the rat preoptic area were ...
详细信息
A set of computer programs which collect and analyze data on the temperature dependence of neuronal activity is described. Data on the response to thermal stimulation of cultured neurons of the rat preoptic area were collected and displayed on-line and were stored on disk for off-line analysis. Statistical analysis of the data examined two alternate models of thermosensitivity: one that the relationship between neuronal activity and temperature was well fit by a linear relationship and the other, that it was well fit by semi-log regression. For each of the models, a neuron was considered to have temperature-dependent activity if two criteria were met: first, that the model was considered adequate by a lack-of-fit F-test and second, that the slope of the regression line differed from zero using a t-test. A statistical method was also used to test the hypothesis that the neuronal response to temperature displays a change point. This method did not identify any neurons whose thermal response relationship could be better fit by two intersecting regression lines than by one regression line.
A simple method of recording the time spent in various behavioral categories during behavioral scoring is described. Use is made of a progammable calculator which is made to function as a multiple timer, keeping track...
详细信息
A simple method of recording the time spent in various behavioral categories during behavioral scoring is described. Use is made of a progammable calculator which is made to function as a multiple timer, keeping track of each of the categories. Any number of mutually exculsive categories can be scored using a single key press, by assigning a pre-set code to each. A print-out of the analysed frequency or duration data can be obtained either concurrently or at any time after the experiment, as required. The least count of the technique is about 1-2 seconds and this precludes its use for extremely rapidly changing behaviors. Apart from this, it is convenient, time-saving and especially suitable for field use.
暂无评论