Showing papers by "University of Jyväskylä published in 1973"
TL;DR: In this article, the authors used the theory of positon single and two-quanta annihilation in flight, the Fermi beta-decay theory, and theories of posititon energy loss in calculations of total probabilities of annihilation of positons in continuous spectra.
48 citations
20 Jul 1973
TL;DR: It is suggested that the variation observed in maximal mechanical power, patellar reflex time and reaction time may be more susceptible to environmental modifications in girls than in boys.
Abstract: Using a simple cumulative model of heredity plus environment, based on intrapair differences observed in monozygous (MZ) and dizygous (DZ) twins, the relative contribution of heredity to the interindividual variance in several neuromuscular parameters was determined with 15 pairs of male (8 MZ and 7 DZ) and 14 pairs of female (7 MZ and 7 DZ) twins ranging in age from 10 to 14 years. The data disclosed that in boys the variability in maximal mechanical (anaerobic) power was 99.2% genetically determined under the environmental conditions of the study. The corresponding heritability estimate values for the patellar reflex time and reaction time were 97.5% and 85.7%, respectively. In girls the heritability estimates could not be computed, because the MZ twins seemed to show almost as much diversity as the DZ twins in all of the variables studied. On the basis of the obtained data it is suggested that the variation observed in maximal mechanical power, patellar reflex time and reaction time may be more susceptible to environmental modifications in girls than in boys.
32 citations
TL;DR: In this article, the effects of cold exposure and glucagon on lipolysis, glycogenolysis and oxygen consumption were measured in young chicks, and it was suggested that glucagon possibly acts in the avian thermoregulation by producing at least lipolytic and glycogenys during cold exposure.
21 citations
TL;DR: In this article, the authors studied the transport efficiency of the helium-jet recoil-transport method in the transport of radioactive recoil atoms, and found that high to moderate efficiencies were observed at transport distances shorter than 20 cm.
15 citations
TL;DR: The results showed that the larger part of the variance of the intensity of aggression in the PAM was accounted for by the situational variations than by interindividual differences in coping with thwarting situations as measured by a rating method.
Abstract: PitkAnen, L. An aggression machine. II. Interindividual differences in the aggressive defence responses aroused by varying stimulus conditions. Scand. J. Psychol., 1973, 14, 65–74.-The subjects, six aggressive and nonaggressive groups of ten 9-year old boys, selected by rating method, were tested with an “aggression machine” (PAM) constructed by the writer. The varying stimulus conditions included two situations of impulsive aggression and six variations of specified attackers. The results showed that (1) the larger part of the variance of the intensity of aggression in the PAM was accounted for by the situational variations than by interindividual differences in coping with thwarting situations as measured by a rating method. (2) The overtly aggressive boys showed strong discrimination between the situations, while the overtly nonaggressive boys were quite insensitive to situational variations. (3) The intensity of aggressive defence towards a boy of the same age correlated most highly with rated aggressiveness. (4) The latency, duration, and number of aggressive responses did not vary as easily as the intensity according to situations.
12 citations
TL;DR: Sixty 9-year-old boys were tested with an aggression machine (PAM) designed by the writer, and the intensity of aggressive defence was determined by the authority of the attacker, the defence being strongest when the attacker was a person of the same age and status, and least vigorous when the attackers was a figure of authority or a weaker person.
Abstract: PitkAnen, L. An aggression machine. I. The intensity of aggressive defence aroused by aggressive offence. Scand. J. Psychol., 1973, 14, 56–64.-Sixty 9-year-old boys were tested with an aggression machine (PAM) designed by the writer. PAM allows the variation of both S (light) and R (pressing a button) intensities. The stimuli and responses were given the designations of offensive and defensive aggression, respectively. The following main hypotheses were supported: (1) The intensity of impulsive aggressive defence to an aggressive offence was adapted to the intensity of attack. (2) The intensity of aggressive defence was determined by the authority of the attacker, the defence being strongest when the attacker was a person of the same age and status, and least vigorous when the attacker was a figure of authority or a weaker person. (3) The correlations of the intensity of aggressive defence against different attackers depended on the similarity of their social position; the correlations were higher the closer the position.
12 citations
TL;DR: In this article, a carrier-loaded helium-jet transport technique is employed without a pumping system for the transportation of recoiling short-lived radioactive nuclides from a target chamber over distances of several meters into a liquid phase.
11 citations
TL;DR: PitkAnen, L. as discussed by the authors described the differences between the groups in terms of a two-dimensional model including the main dimensions "number of overt responses" and "control of behaviour".
Abstract: PitkAnen, L. The stability of aggressive and non-agressive patterns of behaviour. Scand. Psychol., 1973, 14, 75–77.-Six extreme groups (overtly aggressive, aggressive-anxious, anxious, controlled extraverts, balanced controlled, and controlled introverts) had been composed on the basis of peer ratings. The differences between the groups were describable in terms of a two-dimensional model including the main dimensions “number of overt responses” and “control of behaviour”. Independent teacher ratings after an interval of one year showed that the individual patterns of behaviour adopted for coping with thwarting situations were maintained in spite of the change of class environment.
11 citations
TL;DR: In this paper, the excitation curve of the 36S(p,γ)37Cl reaction has been measured in the proton energy range 1 000-1 900 keV.
Abstract: The excitation curve of the 36S(p,γ)37Cl reaction has been measured in the proton energy range 1 000-1 900 keV. 109 resonances were observed. The decay schemes for 13 resonances and energies and branching ratios of 15 bound states have been obtained by means of Ge(Li) detectors. Seven of the bound states have not been reported earlier. Lifetimes or lifetime limits of 5 bound states have been measured by means of Doppler-shift attenuation method.
10 citations
TL;DR: A new selective X-ray fluorescence analyzing method for trace element determination has been developed and the estimated accuracy is of the order of 10 per cent in the sub-ppm range of trace element concentration in organic samples.
5 citations
TL;DR: In this article, a model for diffractive events in high energy hadron collisions is constructed and the charged particle multiplicity distribution following from this is calculated, where the model is a nova-type model in which the excitation spectrum of the nova behaves like M − 2 for large M and decays longitudinally in its rest frame.
01 Jan 1973
TL;DR: In this article, a simple efficient ceramic filter has been introduced for separation of oil vapors from circulated helium, which is observed to pass easily through standard cold-trap and zeolite filters in the same way as carrier fragments behave in the helium-jet recoil-transport method.