Development of an Automatic Differential Lock Based on the Tangential Inertial Forces Principle

Author(s):  
Dmitriyev M S ◽  
Rudnev V V ◽  
Khasanova M L ◽  
Merkulov E P ◽  
Polunin I A
Author(s):  
Katerina Chatzopoulou

This study is an investigation of the expression of negation in the history of Greek, through quantitative data from representative texts from three major stages of vernacular Greek (Attic Greek, Koine, Late Medieval Greek), and qualitative data from Homeric Greek until Standard Modern. The contrast between two complementary negators, NEG1 and NEG2, is explained in terms of sensitivity of NEG2 μη‎ to nonveridicality: NEG2 is a polarity item in all stages of the Greek language, an item licensed by nonveridicality. The asymmetry in the diachronic development of the Greek negator system (the replacement of NEG1 and the preservation of NEG2) is explained with reference to the particulars of the uses of NEG2, specifically the inertial forces drawn by the nonnegative uses of NEG2, which being nonnegative did not experience the renewal pressures predicted by the Jespersen’s Cycle. These are its complementizer uses: (i) as a question particle, and (ii) in introducing verbs of fear complements. A viewpoint for Jespersen’s Cycle is proposed that abstracts away from the morphosyntactic and phonological particulars of the phenomenon and explicitly places its regularities in the semantics, accommodating not only for Greek, but for numerous other languages that deviate in different ways from the traditional description of Jespersen’s Cycle. The developments observed in the history of the Greek negator system agree with current generative theories of syntactic change, regarding the notions of up-the-tree movement.


2017 ◽  
Vol 9 (6) ◽  
pp. 1
Author(s):  
Maurizio Michelini

Rejecting some old misconceptions (such as the “pulling” gravitation that ravaged classical physics) the Inertial-Gravitational theory supported by the Micro-quanta paradigm incorporates both the relativistic concepts of Mass - Momentum - Energy and the quantic Inertial Model of the particle mass. The flux of micro-quanta supports primarily the physical interaction that generates the Inertial forces defined by Newton. Scholars believing that Inertial forces originate from the properties of the empty space, do not pertain to the community of physicists believing on Newton’s Inertial Law. This great ancient physicist admitted he was unable to explicit the physical nature of his Law of Inertia (“Hypotheses non fingo”). However, marking the difference between “empty” and “absolute” space, he remained in his conviction that some unknown physical reality originates (in the absolute space) the inertial forces upon accelerated masses. At present, Micro-quanta paradigm describes the quantic objects that generate through collisions the physical inertial forces on particles. Since the flux of micro-quanta fills all space, there is no need to refer these collisions to some external System of reference. The relative velocity between quanta and particles comes out from the momentum that micro-quanta confer to particles. By this reason the Micro-quanta paradigm defines on pure dynamical bases the relativistic formalism that Special relativity derived from kinematics, so creating flaws that produced the well known paradoxes. To reveal the micro-quanta it's not necessary to devise particular experiments. The technique of the accelerometers has given many evidences of the physical reality guessed by Newton to explain inertial forces exerted on masses. Since the action of micro-quanta is always manifested in statistical terms, classical and relativistic physics allowed to describe Inertia and Gravitation without knowing the quantic nature of these phenomena. The micro-quanta Paradigm shows in particular the proportionality between cross section and mass (ratio Au) of all particles colliding with micro-quanta. To the aim of calculating the transmission across matter of micro-quanta and neutrinos (which show the same nature) the only unknown quantity is the numerical value of the ratio Au. Recalling that micro-quanta flux fills all space, it appears also interesting to search about neutrino collisions with micro-quanta flux as possible cause of the oscillations phenomena that occur during neutrino travels across the (so called) astronomic “empty” space. A quantitative indication on the ratio Ao is found in this paper from an experimental measurement of the solar neutrino flux interacting with the Earth mass in the course of the Borexino research carried out at Gran Sasso National Laboratory.


2021 ◽  
Vol 316 ◽  
pp. 726-731
Author(s):  
Alexey Yu. Rodichev ◽  
Roman N. Polyakov ◽  
Andrey V. Gorin

The article presents the results of a study of the influence of inertial forces on the adhesion of the coating to the external surface of a body of revolution during thermal spraying. A mathematical apparatus is proposed for calculating the inertia forces, acting on a particle of coating, applied to the outer surface of the bodies of revolution. As a result, dependencies have been revealed that allow predicting the adhesion strength of the coating with the steel base during thermal spraying.


1980 ◽  
Vol 85 (1) ◽  
pp. 129-136 ◽  
Author(s):  
C. P. ELLINGTON

1. All of the wing fringe cilia of Thrips physapus, except those along the hindwing leading edge, pivot in elongated sockets which lock them into two positions. 2. The wings lie parallel over the abdomen when not in use, with the cilia locked in the closed position at an angle of 15-20° to the wing axis. The closing of the fringes prevents entanglement of the trailing edge cilia and lateral projection of the forewing leading edge cilia. 3. During flight the cilia are locked in the open position, doubling the wing area. The locking force is stronger than the combined aerodynamic and inertial forces on the cilia. 4. The fringes are opened by abdominal combing and closed by tibial combing. 5. The same morphological features are found in other members of the sub-order Terebrantia. Parallel wings at rest are characteristic of this suborder, and the collapsible fringe system is viewed as an effective method for parking the wings. 6. The fringes of the sub-order Tubulifera are not collapsible. The wings overlap on the abdomen at rest and a similar parking problem does not arise.


2015 ◽  
Vol 72 (8) ◽  
pp. 3199-3213 ◽  
Author(s):  
Nadir Jeevanjee ◽  
David M. Romps

Abstract The Davies-Jones formulation of effective buoyancy is used to define inertial and buoyant components of vertical force and to develop an intuition for these components by considering simple cases. This decomposition is applied to the triggering of new boundary layer mass flux by cold pools in a cloud-resolving simulation of radiative–convective equilibrium (RCE). The triggering is found to be dominated by inertial forces, and this is explained by estimating the ratio of the inertial forcing to the buoyancy forcing, which scales as H/h, where H is the characteristic height of the initial downdraft and h is the characteristic height of the mature cold pool’s gust front. In a simulation of the transition from shallow to deep convection, the buoyancy forcing plays a dominant role in triggering mass flux in the shallow regime, but the force balance tips in favor of inertial forcing just as precipitation sets in, consistent with the RCE results.


1995 ◽  
Vol 286 ◽  
pp. 201-227 ◽  
Author(s):  
J. Feng ◽  
P. Y. Huang ◽  
D. D. Joseph

In this paper we report results of two-dimensional simulations of the motion of elliptic capsules carried by a Poiseuille flow in a channel. The numerical method allows computation of the capsule motion and the fluid flow around the capsule, and accurate evaluation of the lift force and torque. Results show that the motion of a capsule which is heavier than the carrying fluid may be decomposed into three stages: initial lift-off, transient oscillations and steady flying. The behaviour of the capsule during initial lift-off and steady flying is analysed by studying the pressure and shear stress distributions on the capsule. The dominant mechanism for the lift force and torque is lubrication or inertia or a combination of the two under different conditions. The lift-off velocity for the ellipse in two dimensions is compared with experimental values for cylindrical capsules in pipes. Finally, the mechanisms of lift for capsules are applied to flying core flows, and it is argued that inertial forces are responsible for levitating heavy crude oil cores lubricated by water in a horizontal pipeline.


1994 ◽  
Vol 76 (1) ◽  
pp. 370-379 ◽  
Author(s):  
O. Saito ◽  
W. J. Lamm ◽  
J. Hildebrandt ◽  
R. K. Albert

We compared the effects of pulsatile vs. nonpulsatile flow (Q) on pulmonary arterial pressure (Ppa)-Q relationships in zone 3 over wide ranges of pulse rate, stroke volume (SV), and Q. Excised left lungs of rabbits (n = 15) were perfused with tris(hydroxymethyl)aminomethane-buffered Tyrode solution containing 4% dextran, 1% albumin, and 10 mg/l of indomethacin and were ventilated with room air. Pulsatile Q was generated by a diaphragm pump delivering SV of 0.5, 1, or 2 ml (representing approximately 0.3, 0.6, and 1.2 times, respectively, the normal resting SV for rabbit left lung) and adjusting the pump frequency. Nonpulsatile Q was generated by raising an arterial reservoir to the required height. Mean pulmonary arterial (Ppa) and left atrial pressures were measured at end exhalation (positive end-expiratory pressure = 2.5 cmH2O) near the tips of the perfusion cannulas and were referenced to the lung base. Left atrial pressure was held constant at 7 cmH2O.Q was alternated between pulsatile and nonpulsatile, increasing Q stepwise from 100 to 600 ml/min (Q from approximately 0.3 to 2 times the normal resting Q for rabbit left lung), after which Q was reduced stepwise back to initial values. For the smallest SV there were no differences between Ppa-Q curves under pulsatile and nonpulsatile conditions. At the largest SV, Ppa was greater during pulsatile than nonpulsatile Q at Q > 100 ml/min. The slopes of the Ppa-Q curves were greater during pulsatile Q at the two larger SV values. These results can be explained by increasing Q turbulence and less ideal velocity profiles at higher peak Q resulting from the effects of rapidly changing inertial forces.


2021 ◽  
Vol 118 (8) ◽  
pp. e2013801118
Author(s):  
Amit Nagarkar ◽  
Won-Kyu Lee ◽  
Daniel J. Preston ◽  
Markus P. Nemitz ◽  
Nan-Nan Deng ◽  
...  

Locomotion of an organism interacting with an environment is the consequence of a symmetry-breaking action in space-time. Here we show a minimal instantiation of this principle using a thin circular sheet, actuated symmetrically by a pneumatic source, using pressure to change shape nonlinearly via a spontaneous buckling instability. This leads to a polarized, bilaterally symmetric cone that can walk on land and swim in water. In either mode of locomotion, the emergence of shape asymmetry in the sheet leads to an asymmetric interaction with the environment that generates movement––via anisotropic friction on land, and via directed inertial forces in water. Scaling laws for the speed of the sheet of the actuator as a function of its size, shape, and the frequency of actuation are consistent with our observations. The presence of easily controllable reversible modes of buckling deformation further allows for a change in the direction of locomotion in open arenas and the ability to squeeze through confined environments––both of which we demonstrate using simple experiments. Our simple approach of harnessing elastic instabilities in soft structures to drive locomotion enables the design of novel shape-changing robots and other bioinspired machines at multiple scales.


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