Limb Segment Load Inhibits the Recovery of Soleus H-Reflex After Segmental Vibration in Humans

We investigated the effects of vertical vibration and compressive load on soleus H-reflex amplitude and postactivation depression. We hypothesized that, in the presence of a compressive load, limb vibration induces a longer suppression of soleus H-reflex. Eleven healthy adults received vibratory stimulation at a fixed frequency (30 Hz) over two loading conditions (0% and 50% of individual's body weight). H-reflex amplitude was depressed ～88% in both conditions during vibration. Cyclic application of compression after cessation of the vibration caused a persistent reduction in H-reflex excitability and postactivation depression for > 2.5 min. A combination of limb segment vibration and compression may offer a nonpharmacologic method to modulate spinal reflex excitability in people after CNS injury.     

Energy,Complexity, and Strategies of Evolution: As Illustrated by Maya Indians of Guatemala

Using free energy rate density (Φ_m) I differentiate two evolutionary strategies common to cosmic, biological, and cultural systems: the horizontal when energy increases proportional to mass, with no increase in complexity; and the vertical when it increases disproportionately to the mass and complexity increases. The vertical process is a continuing increase in complexity such that the system becomes vulnerable to collapse when energy sources fail. This is illustrated by a comparison of four Mayan Indian groups in Guatemala.     

The Psychophysiology Of Intuition: A Quantum-Holographic Theory Of Nonlocal Communication

This work seeks to explain intuitive perception—those perceptions that are not based on reason or logic or on memories or extrapolations from the past, but are based, instead, on accurate foreknowledge of the future. Often such intuitive foreknowledge involves perception of implicit information about nonlocal objects and/or events by the body's psychophysiological systems. Recent experiments have shown that intuitive perception of a future event is related to the degree of emotional significance of that event, and a new study shows that both the brain and the heart are involved in processing a pre-stimulus emotional response to the future event. Drawing on this research and on the principles of quantum holography, I develop a theory of intuition that views the perception of things remote in space or ahead in time (nonlocal communication) as involving processes of energetic resonance connecting the body's psychophysiological systems to the quantum level. The theory explains how focused emotional attention directed to the nonlocal object of interest attunes the bio-emotional energy generated by the body's psychophysiological systems to a domain of quantum-holographical information, which contains implicit information about the object. The body's perception of such implicit information about things distant in space/time is experienced as an intuition.     

Christer Sjödin interviews Jan Stensson

Abstract

The author examines different definitions and applications of the terms “psychic energy” and “libido.” With regard to the “psychic energy” terminology, he shows that its application and usage relate in particular to the perspective of Brenner and not to Freud's definition. He argues that Freud uses the term “psychic energy” as a synonym for “libido,” and not “libido” as a synonym for “psychic energy.” It is demonstrated that in Freud's view, up until 1914, “libido” relates to manifestations of bodily sexual tensions, and subsequently this term applies to the manifestations of sexual energy in the psychic field. The author rejects this change in terminology and also challenges Freud's attempt to use dynamic-economic considerations as an explanatory device for epistemological reasons. Freud's concept of energy is inconsistent with the meaning of energy as defined in the physical sciences, and whereas the metapsychological topographical, dynamic, and structural viewpoints have a solid foundation in the representational world to which the psychoanalytic process affords unique access, this is not true of the economic viewpoint. It is claimed that bodily tensions only exist in the representational world in the form of affects, so that, in the author's opinion, the economic viewpoint should be abandoned in favour of an affective one. In the context of the endeavour to obtain pleasure and avoid unpleasure adduced by Freud, this viewpoint focuses on the relationships between affects and the different elements of the representational world, thereby serving as the subject of metapsychological investigation.     

Temperature-dependent crack surface tension

The fracture surface energy is calculated for a one-dimensional, exactly solvable model of a crack. The temperature dependence of the crack surface tension is determined on the basis of a self-consistent Einstein approach. It is found that lattice vibrations result in a strong reduction in the crack surface tension.     

The 328 cm−1 infrared absorption band in type Ia diamonds

Abstract

A defect-induced peak at 328 cm^?1 in the infrared absorption spectrum of type Ia diamonds is confirmed to belong with the other absorptions (in particular, the B′ localised mode near 1370 cm^?1 and the D component of the lattice vibrations) which are associated with the {100} platelets found in these crystals. It is suggested that this absorption and other weaker absorptions found in its vicinity may be due to the bending vibrations of atomic bonds in the platelets.     

Supersonic crack motion in a harmonic lattice

Antiplane shear cracks in a harmonic square lattice have been studied in a molecular dynamics simulation. They can reach velocities larger than the shear wave velocity.     

Structure images of unaged martensite containing a high carbon content

Abstract

A highly tetragonal (large c/a ratio) martensite in a Fe-4 wt% Al-1·6 wt% Mn-2 wt% Calloy, which is not aged and considered to be as ‘fresh’ as possible, has been observed by high-resolution electron microscope. From the arrangement of atom rows in the [010] structure image and the corresponding electron diffraction pattern, it is concluded that carbon atoms are clustered on the (305) plane. The unit structure of these carbon-clustered regions is similar to that of the modulated structure observed in Fe-C alloys, although a periodic layer distribution of carbon atoms is not observed.     

High-temperature creep associated with the climb of extended dislocations subjected to chemical stresses

The effect of chemical stresses upon the relation between extended dislocations and high-temperature creep in a thin plate has been investigated. The critical stress needed for the contraction of extended jogs and its effect on the creep rate are obtained. The results indicate that the critical stress needed for the contraction increases with decreasing stacking fault energy (SFE). However, creep occurs more easily with increasing SFE and increasing angle of the Burgers vector to the dislocation line, as well as with the concentration of any diffusing atoms.