Showing papers by "Stevens Institute of Technology published in 1976"
TL;DR: A connection between ordered algebras and ordered algebraic theories, and a logic of inequalities, analogous to equational logic, are concerned and a completeness theorem for this logic is proved.
169 citations
131 citations
TL;DR: A practical method for overcoming a thresholding action that distorts low-amplitude input signals and use of appropriate weights in the accumulation has important advantages for providing finer resoution, less spectral distortion, and white quantization noise.
Abstract: We present and analyze a method of interpolation that improves the amplitude resolution of an analog-to-digital converter. The technique requires feedback around a quantizer that operates at high speed and digital accumulation of its quantized values to provide a PCM output. We show that use of appropriate weights in the accumulation has important advantages for providing finer resoution, less spectral distortion, and white quantization noise. The theoretical discussion is supplemented by the report of a practical converter designed especially to show up the strengths and weaknesses of the technique. This converter comprises a sigma-delta modulator operating at 8 MHz and an accumulation of the 1-bit code with triangularly distributed weights. 13-bit resolution at 8 kwords/s is realized by periodically dumping the accumulation to the output. We present a practical method for overcoming a thresholding action that distorts low-amplitude input signals.
95 citations
TL;DR: In this paper, an analysis of dynamic and nonlocal longitudinal dielectric response properties of a two-dimensional Landau-quantized plasma is carried out, using a thermodynamic Green's function formulation of the RPA with a 2D thermal Green's functions for electron propagation in a magnetic field developed in closed form.
69 citations
62 citations
TL;DR: To determine whether employees' locus of control moderated the relationship between several work characteristics (autonomy, feedback, performance-reward connections, job involvement) and job satisfaction 193 managers in a large utility company participated.
Abstract: To determine whether employees' locus of control moderated the relationship between several work characteristics (autonomy, feedback, performance-reward connections, job involvement) and job satisfaction 193 managers in a large utility company participated. Internals (n = 58) perceived more autonomy, feedback, and performance-reward connections on their jobs than externals (n = 69). Internals were more involved and satisfied with their jobs than were externals. However, the correlations between the work characteristics and job satisfaction were generally positive for both internals and externals but small.
45 citations
TL;DR: In this paper, an analysis of the statics and dynamics of mooring cables is presented, including effects that have not been considered by any previous investigator and corrects certain errors that have been perpetuated by all previous investigators.
Abstract: An analysis is presented of the statics and dynamics of mooring cables. The analysis includes effects that have not been considered by any previous investigator and corrects certain errors that have been perpetuated by all previous investigators. In addition to the discussion of hitherto unsuspected physical effects, this paper also includes a discussion of the numerical computation of buoy-cable systems in waves.
41 citations
TL;DR: In this article, the phenomenon of flow-induced crystallization was investigated using a linear polyethylene above its normal melting point flowing continuously in a Biconical Rheometer, and it was found that the resin crystallized in the superheated state at rates which increased with increasing shear rate and decreasing temperature.
Abstract: The phenomenon of flow-induced crystallization was investigated using a linear polyethylene above its normal melting point flowing continuously in a Biconical Rheometer. It was found that the resin crystallized in the superheated state at rates which increased with increasing shear rate and decreasing temperature. A method of analysis of the temperature dependence of the various stages of flow induced crystallization is proposed. It deals with and attempts to explain the experimental fact that a higher viscosity enhances the rate of flow-induced crystallization in contrast to the effect of viscosity on the rate of quiescent crystallization. Some of the flow-induced crystallization samples were transparent and exhibited a high DSC thermogram “tail”.
40 citations
TL;DR: It was found that the most likely students to consider their chosen occupation ideal were high in both self-esteem and career salience, and the tendency to view one's chosen occupation as ideal was related to its perceived capacity to satisfy intrinsic work needs.
35 citations
Brown University1, CERN2, Fermilab3, Illinois Institute of Technology4, University of Illinois at Urbana–Champaign5, Indiana University6, Johns Hopkins University7, Massachusetts Institute of Technology8, Oak Ridge National Laboratory9, Rutgers University10, Stevens Institute of Technology11, University of Tennessee12, Yale University13
TL;DR: In this paper, Elastic, total and topological cross sections were obtained for both π − p and K − p interactions for the FNAL Hybrid Proportional Wire Chamber-30 inch Bubble Chamber System, in a tagged beam of 147 GeV/c negative particles.
28 citations
TL;DR: A facile method for the preparation of α-azido-β-lactams and other 3-substituted-2- azetidinones without employing azidoacetyl chloride is reported.
TL;DR: The mediating effect of organizational time investments on the relationship between work environment perceptions and mental health was explored in two work settings as mentioned in this paper, where participants were 257 managerial-level employees in a line organization and 214 in a staff setting.
01 Sep 1976
TL;DR: In this paper, it was shown that the Orr-Sommerfeld equation governing the stability of any mean shear flow in an unbounded domain which has finite energy under some Galilean transformation has a continuous spectrum.
Abstract: : It is shown that the Orr-Sommerfeld equation governing the stability of any mean shear flow in an unbounded domain which has finite energy under some Galilean transformation has a continuous spectrum. This result applies to both the temporal and spatial stability problems. Formulae for the location of this continuum in the complex wave speed plane are given. The continuous spectrum and corresponding eigenfunctions are calculated for two samples problems: the Blasius boundary layer and the two-dimensional laminar jet. The nature of the eigenfunctions, which are very different from the Tollmien-Schlichting waves, are discussed. Three mechanisms are proposed by which these continuum modes could cause transition in a shear flow while bypassing the usual linear Tollmien-Schlichting stage.
TL;DR: In this paper, the authors derived lower bounds on the transport coefficients of a multi-component relativistic system from the set of coupled Boltzmann equations that are assumed to govern its behavior.
Abstract: Variational expressions that give lower bounds on the transport coefficients of a multi- component relativistic system are derived from the set of coupled Boltzmann equations that are assumed to govern its behavior. No assumptions concerning the types of interactions that may exist between the various particles comprising the system other than that they are point-like are made. In particular we do not restrict ourselves to binary interactions and we allow particle creation and destruction to occur. We also take account of any external fields that may be present.
TL;DR: In this paper, a computer study was made to determine the thermal ignition criteria and ignition boundaries for chain-addition polymerization in a well-mixed batch system using a simple kinetic model.
Abstract: A computer study was made to determine the thermal ignition criteria and ignition boundaries for chain-addition polymerization in a well-mixed batch system using a simple kinetic model. The occurrence of thermal runaway was shown to be a function of initiator type, feed conditions, and heat transport parameters. It was found that thermal runaway does not occur early with respect to monomer and initiator conversions and that for strongly dead-ending systems, the sensitivity characteristic of ignition disappears. The role of various dimensionless parameters in characterizing reaction behavior is also discussed.
TL;DR: In this paper, the infra-red (i.r.) spectra of the two polymorphous forms (modification 1 and 2) of isotactic poly(1-pentene) are reported.
TL;DR: In this article, a new nomenclature for β-lactams is proposed which provides a convenient stereo-description of diverse types of fused β lactams appearing in the literature.
TL;DR: In this article, a statistical analysis of blister parameters (diameter and skin thickness) is used to investigate the internal structure of a deuteron beam ejected from the plasma, and the value K ∼ 10−20 keV is obtained as the typical ion energy for the bulk of the deuterons and an ion energy E ∼ 200−230 keV was typical for individual ion groups (ion strings) forming the high-energy ion beam.
TL;DR: The synthesis of β-northiadiaza steroid analogs has been described in this paper, where suitable o-aminonitriles were acylated with γ-chlorobutyryl chloride.
TL;DR: In this article, an anomalous specific heat is observed below 0.6 K which cannot be accounted for by the nearest-neighbor electric quadruple-quadrupole (EQQ) interactions betweenJ=1 molecules.
Abstract: Measurements have been made of the specific heat of solid D 2 with concentrations of para-D 2 between approximately0.9 and6%. The measurements are an extension of previously reported results to 150 mK and to various para-D 2 concentrations. An anomalous specific heat is observed below 0.6 K which cannot be accounted for by the nearest-neighbor electric quadruple-quadrupole (EQQ) interactions betweenJ=1 molecules. This anomaly is explained in terms of next- and next-next-nearest-neighbor interactions between pairs and nearest-neighbor interactions between triple configurations ofJ=1 molecules. In addition, estimates are presented of the crystalline field splitting parameter (ɛ/k) in solid deuterium with lowJ=1 concentration.
01 Jan 1976
TL;DR: In this article, a facile method for the synthesis of substituted thiophenopyrimidones was described, and a number of such compounds of varying complexity were synthesized which are otherwise not so easily accessible.
TL;DR: In this paper, a relaxation-time model for the relativistic Boltzmann equation of a single component gas is solved to second order in the second-order version of the Chapman-Enskog method developed by Marle.
Abstract: A relaxation-time model for the relativistic Boltzmann equation of a single-component gas is solved to second, or “Burnett”, order using the relativistic version of the Chapman-Enskog method developed by Marle. Expressions are obtained from this second order solution for the “Burnett” contributions to the heat flux and pressure tensor of the gas. Using the “Burnett” equations, which incorporate these contributions, expressions are then derived for the dispersion and absorption of sound in the gas which agree, in the classical limit, with the results of Wang Chang and Uhlenbeck.
TL;DR: In this paper, the thermal oxidation of poly(4-methyl-1-pentene) was studied in the bulk phase using infra-red (i.r.) spectroscopy and the rates of formation of the nonvolatile products were assessed from the i.r. bands of the carbonyl groups at different temperatures and various oxygen concentrations.
TL;DR: In this paper, thermal runaway arid parametric sensitivity was experimentally demonstrated in styrene polymerizations, and a dimensionless boundary was established for several initiator concentrations, and runaway sensitivity was shown to disappear under specific conditions.
Abstract: Thermal runaway arid parametric sensitivity were experimentally demonstrated in styrene polymerizations. Ignition boundaries were established for several initiator concentrations and a dimensionless boundary plotted. Runaway sensitivity was shown to disappear under specific conditions.
TL;DR: In this article, the hydrodynamic equations of motion for an electron gas in interaction with a radiation field are derived from the kinetic theory description of this system and variational expressions for the transport coefficients appearing in these equations are obtained.
Abstract: The hydrodynamic equations of motion for an electron gas in interaction with a radiation field are derived from the kinetic theory description of this system. Variational expressions for the transport coefficients appearing in these equations are obtained. The expressions for the transport coefficients are compared to the previously obtained expressions for these quantities and the differences are noted.
TL;DR: Several polycyclic β-lactams have been synthesized by the reactions of cyclic imines with acid chlorides in the presence of triethylamine, and some carbocyclic analogues of cephalosporin were found to possess antibacterial activity.
Abstract: Several polycyclic β-lactams have been synthesized by the reactions of cyclic imines with acid chlorides in the presence of triethylamine. The azido-functions in these β-lactams were reduced to amino-groups, which were then acylated with phenylacetyl chloride to introduce the penicillin G side chain. Some carbocyclic analogues of cephalosporin were found to possess antibacterial activity.
TL;DR: In this article, the titanium tetrachloride has been shown to be an effective and reliable n.m.r. shift reagent to differentiate 2-Azetidinones on the basis of their different sensitivities to this reagent.
Abstract: 2-Azetidinones which carry a proton each on C-3 and C-4 often pose a problem in the correct assignment of the resonances due to these protons; titanium tetrachloride has been shown to be an effective and reliable n.m.r. shift reagent to differentiate between these two protons on the basis of their different sensitivities to this reagent. A few compounds were also studied with Eu(fod)3 and Pr(fod)3 for the sake of confirmation.