Showing papers by "Florida Atlantic University published in 1976"
45 citations
TL;DR: In this paper, the lift augmentation effect of a rotating cylinder located at the truncated trailing edge of a body was presented, and the lift coefficients were found to be a linear function of the ratio of cylinder speed to freestream velocity and reached a value of 1.20 at a speed ratio of 3.0.
Abstract: The lift augmentation effect of a rotating cylinder located at the truncated trailing edge of a body is presented. A symmetrical airfoil model with a trailing-edge cylinder was tested in a low-speed wind tunnel, and the lift produced as a function of cylinder speed was determined for cylinder speeds up to three times the freestream velocity. Since the lift was attained at a 0ous geometric angle of attack, the lift- producing phenomenon is called circulation control, which results from the alteration of the wake region by the spinning cylinder. The lift coefficients was found to be a linear function of the ratio of cylinder speed to freestream velocity and reached a value of 1.20 at a speed ratio of 3.0. A comparison is made with a lone spinning cylinder in a crossflow (magnus effect) and the cylinder-forebody combination reported herein. The cylinder-forebody pair produces higher values of lift at a given cylinder speed and a linear response in contrast to the nonlinear response of the lone cylinder at low cylinder speeds.
45 citations
TL;DR: A cyclic AMP dependent protein kinase (EC 2.7.1.37) from sea urchin sperm as purified to near homogeneity and characterized was obtained and it may be calculated that theprotein kinase constitutes as much as 1.5% of the soluble protein in sperm.
41 citations
TL;DR: Twenty-three species of gastropod molluscs were collected during a 14-month period from Zostera in the lower York River, Virginia, with Diastoma varium andrepidula convexa being the two most abundant species collected.
Abstract: Twenty-three species of gastropod molluscs, including 10 prosobranchs and 13 opisthobranchs, were collected during a 14-month period fromZostera in the lower York River, Virginia. Salinities ranged from 16.0 to 22.4 ‰ during the sampling period; temperatures ranged from 2.8 to 28.3 C. Seasonal abundance, depth distribution, and notes on the life cycles and general ecology of this epifauna are reported.Diastoma varium andCrepidula convexa occurred throughout the year and were the two most abundant species collected.
27 citations
TL;DR: Data collected from 207 academics who retired from state and small private colleges and ivy league and large state universities indicate that to varying degrees they continue to engage in professional activities after retirement.
Abstract: A limited literature on the retirement of academics suggests that they do not follow the expected pattern of retirement but may be similar to scientists in retirement. Data collected from 207 academics who retired from state and small private colleges and ivy league and large state universities indicate that to varying degrees they continue to engage in professional activities after retirement. Academics who are high on professional visibility appear to be especially likely to continue to engage in research and/or writing. The importance of psychological centrality of pre-retirement work to post-retirement activity is suggested.
22 citations
TL;DR: In this article, the empirical relation between criminal behavior and the gains from crime is examined and the unsettling possibility that decreases in the gains of crime my lead to increases in the number of crimes is discussed.
Abstract: A number of economists recently have applied tools of economics to analysis of crime. The resulting models of criminal activity typically postulate that crime is positively related to gains porn crime and inversely related to the probability of punishment. While empirical studies have confirmed this latter effect, the relation between gains from crime and criminal activity has not been satisfactorily examined. This paper specifically tests the empirical relation between criminal behavior and the gains from crime. The unsettling possibility that decreases in the gains from crime my lead to increases in the number of crimes is discussed.
13 citations
TL;DR: In this paper, the processing of fragmented figures was investigated in a same-different reaction time task with pairs of intact and pairs of fragmented alphabet letters and it was concluded that familiarity had a direct effect on the structural/organizational processing of the fragmented figures.
Abstract: The processing of fragmented figures was investigated in a same-different reaction time task with pairs of intact and pairs of fragmented alphabet letters The effect of fragmentation was significantly larger for pairs of letters rotated into an unfamiliar orientation than for pairs of normally oriented letters Since this significant interaction was obtained for subjects emphasizing a structural mode of processing (Hock, 1973), it was concluded that familiarity had a direct effect on the structural/ organizational processing of the fragmented figures
9 citations
TL;DR: Individual differences in perceptual processing were investigated in a task requiring subjects to match words (either general or specific category names) with simultaneously presented pictures, supporting the hypothesis that structural subjects would attend to all the information in the pictures, regardless of the category level specified by the word.
Abstract: Individual differences in perceptual processing were investigated in a task requiring subjects to match words (either general or specific category names) with simultaneously presented pictures. Based on the results of previous research, individual differences in processing were inferred from the effect, on “same” reaction time, of rotating the pictures into an unfamiliar orientation. For subjects inferred to emphasize an analytic mode of processing, word-picture matches were faster for general than for specific category names, supporting the hypothesis that analytic subjects would attend to the minimal number of features necessary to infer the categorical identity of the pictures. For subjects inferred to emphasize a structural mode of processing, there was little difference in word-picture matching time between specific and general category names, supporting the hypothesis that structural subjects would attend to all the information in the pictures, regardless of the category level specified by the word.
8 citations
01 Jan 1976
8 citations
TL;DR: In this article, photoionization properties for an impurity in a semiconductor are used to reconstruct the radial dependence of the bound-state wave function, through inversion of a Hankel transform.
Abstract: Photoionization properties for an impurity in a semiconductor are used to reconstruct the radial dependence of the bound-state wave function, through inversion of a Hankel transform. For a heuristic wave function, with effective mass approximated by a scalar, optical data for boron in Si transform to $\ensuremath{\psi}(\mathcal{r})$ characteristic of a nonhydrogenic shallow acceptor. Data for "deeper" acceptors in Si, Ge, and GaAs dictate a compact, sharply defined charged and an effective potential steeper than Coulombic.
7 citations
TL;DR: In this paper, it is shown that every vector space over GF (2) of dimension at least six contains a subset with trivial isotropy subgroup, where the subgroup is defined by affine groups.
14 Jul 1976
TL;DR: PRIMS is an interactive system to be used in the layout of hybrid circuits and includes commands for defining regions corresponding to integrated circuit chips, and for causing the system to define a tree of conducting paths to interconnect a set of points.
Abstract: PRIMS is an interactive system to be used in the layout of hybrid circuits. The layout involves positioning integrated circuit chips and resistors on a substrate surface. Conducting paths are then defined in order to make interconnections between chips, external connection pads positioned around the edge of the substrate, etc.PRIMS is actually a language which includes commands for defining regions corresponding to integrated circuit chips, and for causing the system to define a tree of conducting paths to interconnect a set of points. There are also commands for displaying a partial layout, for editing the layout, and for generating plotter code for the final layout.
TL;DR: In this article, the authors performed stress-corrosion cracking experiments on double-cantilever-beam specimens of 7079-T651 aluminum in 3 percent sodium chloride in distilled water and in seawater.
Abstract: Stress-corrosion cracking experiments have been performed on double-cantilever-beam specimens of 7079-T651 aluminum in 3 percent sodium chloride in distilled water and in seawater. At relatively low-stress intensities (Region I of the crack-growth rate/stress-intensity plot) crack length versus exposure time curves were comprised of steps, plateaus, and straight-line segments. These could not be related to any variations in the stress-intensity parameter; so, where such behavior was encountered, no unique relationship between stress intensity and crack-growth rate was apparent. On the other hand, crack-growth rate did vary inversely with exposure time for the range 25 to 200 h. Such an observation was interpreted to mean that properties of the local environment within a crack control extension rate.
22 Apr 1976
TL;DR: SIMFO, a newly designed language, provides the necessary definition of a system using a COBOL-like structure, and complying to the above requirements.
Abstract: Discrete event simulation languages can be described in terms of simulation perspective and language structure. A useful language should allow an emphasis to be placed on transactions, queues, and item flow. The language structure should be self-documenting, readable, and descriptive rather than algorithmic in philosophy. SIMFO, a newly designed language, provides the necessary definition of a system using a COBOL-like structure, and complying to the above requirements. A system can be defined in terms of the items, facilities, servers, queues, and item flow. Branching involves only an IF - - - THEN construction. Aside from summary information, all analyses are performed off-line.
TL;DR: In this paper, the authors performed reverse bend, constant deflection fatigue tests on notched steel specimens and found that the endurance limit for high inclusion specimens exhibited scatter in excess of 25 pct, and this was correlated with concentration of manganese sulfide inclusions at the notch root vicinity.
Abstract: Reverse bend, constant deflection fatigue tests were performed in ambient temperature air on notched 1018 steel specimens Endurance limit for these exhibited scatter in excess of 25 pct, and this was correlated with concentration of manganese sulfide inclusions at the notch root vicinity For specimens designated as “high inclusion” the endurance limit was 95 MN/m2 (14 ksi); and for “low inclusion” ones it was 130 MN/m2 (19 ksi) By monitoring crack length as a function of number of cycles it was observed that unbroken specimens tested above approximately 85 MN/m2 (125 ksi) contained nonpropagating cracks Also, high inclusion specimens fatigued at stresses above their endurance limit, but less than about 140 MN/m2 (20 ksi) exhibited fatigue crack hesitation; that is, cracks initiated and grew to microscopic size but then arrested for a finite number of subsequent cycles The endurance limit for high inclusion specimens was then a stress above which arrested cracks repropagate and below which they do not Repropagation of hesitant fatigue cracks is projected to result from inclusion related cyclic stress damage near the crack tip, which was possibly stimulated by atmospheric interactions
22 Apr 1976
TL;DR: A proof that specifies the relative efficiences of members of a class of learning strategies in dialogue experiments that concern the rote learning of associations among randomly matched predicates and individuals is revealed.
Abstract: Carnap (1) proposed measures for assigning probabilities as degrees of conformation to sentences in a formal language previously. This development in inductive logic permitted Carnap and Bar-Hillel (2) to outline semantic information measures (SIM) utilizing logical probabilities. Stapleton, Siegmann, and Coulter (3) demonstrated that certain learning experiments in both artificial intelligence and cognitive psychology can be characterized within the framework of languages specified by Carnap and Bar-Hillel. These experiments are called "dialogue experiments". The SIM can be employed to monitor information transfer during the experiment. This formalization also allows a dynamic representation of the problem space within the language.This research is extended here by a proof that specifies the relative efficiences of members of a class of learning strategies in dialogue experiments. These experiments concern the rote learning of associations among randomly matched predicates and individuals. The proof reveals a hierarchy of strategies that are ranked by rates of expected information gain relative to the SIM.
TL;DR: In this paper, Vincent generalized from one canonical correlation in each study to determine the overall theoretical importance of the factors of Economic Development, Democracy, and U.S. Relations in predicting UN voting, and used multiple regression instead of canonical correlation.
Abstract: Moore (1975) attempts a critique of two of my articles (Vincent, 1971, 1973) concerning voting patterns in the United Nations. In the main the critique reduces to: (1) Vincent generalized from one canonical correlation in each study to determine the overall theoretical importance of the factors of Economic Development, Democracy, and U.S. Relations in predicting UN voting, and (2) Vincent should have used multiple regression instead of canonical correlation (which should not have been used on the data) and, had he done so, he would not have arrived at his conclusions concerning the relative importance of economic development as a predictor.'
TL;DR: The Bessel polynomials as mentioned in this paper are a class of orthogonal polynomorphisms, and they have been studied extensively in the area of matrix theory and matrix inequalities.
Abstract: 1. C. W. Barnes, Remarks on the Bessel polynomials, this MONTHLY, 80 (1973) 1034-1040. 2. I. Bendixson, Sur les Racines d'une Equation Fondamentale, Acta Math., 25 (1902) 359-365. 3. G. Birkhoff and R. S. Varga, Discretization errors for well-set Cauchy problems. I, J. Maths. Phys., 44 (1965) 1-23. 4. K. Docev, On generalized Bessel polynomials, Bulgar. Akad. Nauk. Izv. Mat. Inst., 6 (1962) 89-94. 5. B. L. Ehle, On Pade approximations to the exponential function and A-stable methods for the numerical solution of initial value problems, Doctoral Thesis, University of Waterloo, 1969. 6. E. Grosswald, On some algebraic properties of the Bessel polynomials, Trans. Amer. Math. Soc., 71 (1951) 197-210. 7. E. A. Guillemin, Synthesis of Passive Networks, Wiley, New York, 1957. 8. M. A. Hirsch, Sur les Racines d'une Equation Fondamentale, Acta Math., 25 (1902) 367-370. 9. H. L. Krall and 0. Frink, A new class of orthogonal polynomials: the Bessel polynomials, Trans. Amer. Math. Soc., 65 (1949) 100-115. 10. M. Marcus and H. Minc, A Survey of Matrix Theory and Matrix Inequalities, Prindle, Weber and Schmidt, Boston, 1964. 11. M. Parodi, Sur les Polyn6mes de Bessel, Compt. Rend. Acad. Sci. Paris, 274 (1972) 1153-1155. 12. J. Wimp, On the zeros of a confluent hypergeometric function, Proc. Amer. Math. Soc., 16 (1965) 281-283. 13. A. Wragg and C. Davies, Computation of the exponential of a matrix. I: Theoretical considerations, J. Inst. Maths. Applics., 11 (1973) 369-375.
TL;DR: In this article, a factorial combination of preshift and post-shift sucrose concentration was used to learn a brightness discrimination task, and subjects were either shifted to a novel reward concentration or maintained on the preshift magnitude.
Abstract: Twenty-eight rats were randomly assigned to four groups representing a factorial combination of two levels of preshift and two levels of postshift sucrose concentration. Following 220 preshift trials, the subjects were required to learn a brightness discrimination, and they either shifted to a novel reward concentration or maintained on the preshift magnitude. The results of an analysis of response speed indicated significant magnitude effects as well as NCE but no indication of PCE. Analysis of the number of errors indicated NCE but not PCE. The results were discussed with reference to perceptual and sequential theories of contrast effects.