Investigative study on the feasibility of simultaneous movement along multiple axes for helical cut using RTM

2021 ◽  
Author(s):  
K.S. Abhilash ◽  
V.V. Sudheer Babu ◽  
A. Nisam Rahman ◽  
Ananda Mohan Vemula ◽  
P.S. Shijin Kumar
Keyword(s):  
Simultaneous Movement

scholarly journals Globalization and the Politics of Translation Studies

2006 ◽  
Vol 51 (4) ◽  
pp. 744-757 ◽  
Author(s):  
Anthony Pym
Keyword(s):  
International Association ◽  
Translation Studies ◽  
Fundamental Change ◽  
Production Processes ◽  
Global Demand ◽  
Minority Cultures ◽  
Production And Distribution ◽  
Simultaneous Movement ◽  
Political Principles ◽  
Cultural Alterity

Abstract Globalization can be seen as a consequence of technologies reducing the costs of communication. This reduction has led both to the rise of English as the international lingua franca and to an increase in the global demand for translations. The simultaneous movement on both fronts is explained by the divergent communication strategies informing the production and distribution of information, where translation can only be expected to remain significant for distribution, and not for production. The fundamental change in the resulting communication patterns is the emergence of one-to-many document production processes, which are displacing the traditional source-target models still used in Translation Studies. Translation Studies might nevertheless retain a set of political principles that could constitute its own identity with respect to globalization. Such principles would be expressed in the national and regional organization of the discipline, in the defense of minority cultures, and in a general stake in cultural alterity. The possible existence of such principles is here examined on the basis of three instances where Translation Studies might address globalization in political terms: the weakness of the discipline in dominant monocultures, the development of an international association of Translation Studies, and political boycotts of translation scholars.

Reduced heart rate variability during sleep in long-duration spaceflight

2013 ◽  
Vol 305 (2) ◽  
pp. R164-R170 ◽  
Author(s):  
D. Xu ◽  
J. K. Shoemaker ◽  
A. P. Blaber ◽  
P. Arbeille ◽  
K. Fraser ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Substantial Reduction ◽  
Space Station ◽  
Power Spectral Analysis ◽  
Power Spectral ◽  
Long Duration ◽  
Fractal Properties ◽  
Wide Range ◽  
Simultaneous Movement

Limited data are available to describe the regulation of heart rate (HR) during sleep in spaceflight. Sleep provides a stable supine baseline during preflight Earth recordings for comparison of heart rate variability (HRV) over a wide range of frequencies using both linear, complexity, and fractal indicators. The current study investigated the effect of long-duration spaceflight on HR and HRV during sleep in seven astronauts aboard the International Space Station up to 6 mo. Measurements included electrocardiographic waveforms from Holter monitors and simultaneous movement records from accelerometers before, during, and after the flights. HR was unchanged inflight and elevated postflight [59.6 ± 8.9 beats per minute (bpm) compared with preflight 53.3 ± 7.3 bpm; P < 0.01]. Compared with preflight data, HRV indicators from both time domain and power spectral analysis methods were diminished inflight from ultralow to high frequencies and partially recovered to preflight levels after landing. During inflight and at postflight, complexity and fractal properties of HR were not different from preflight properties. Slow fluctuations (<0.04 Hz) in HR presented moderate correlations with movements during sleep, partially accounting for the reduction in HRV. In summary, substantial reduction in HRV was observed with linear, but not with complexity and fractal, methods of analysis. These results suggest that periodic elements that influence regulation of HR through reflex mechanisms are altered during sleep in spaceflight but that underlying system complexity and fractal dynamics were not altered.

A critical look at the Wallace-Bott hypothesis in fault-slip analysis

2013 ◽  
Vol 184 (4-5) ◽  
pp. 299-306 ◽  
Author(s):  
Richard J. Lisle
Keyword(s):  
Shear Stress ◽  
Maximum Shear Stress ◽  
Fault Slip ◽  
Shear Stresses ◽  
Homogeneous State ◽  
Slip Direction ◽  
Fault Surface ◽  
State Of Stress ◽  
Simultaneous Movement

AbstractThe assumption is widely made that slip on faults occurs in the direction of maximum resolved shear stress, an assumption known as the Wallace-Bott hypothesis. This assumption is used to theoretically predict slip directions from known in situ stresses, and also as the basis of palaeostress inversion from fault-slip data. This paper examines different situations in relation to the appropriateness of this assumption. Firstly, it is shown that the magnitude of the shear stress resolved within a plane is a function with a poorly defined maximum direction, so that shear stress values greater than 90% of the maximum occur within a wide angular range (± 26°) degrees. The situation of simultaneous movement on pairs of faults requires slip on each fault to be parallel to their mutual line of intersection. However, the resolved shear stresses arising from a homogeneous state of stress do not accord with such a slip arrangement except in the case of pairs of perpendicular faults. Where fault surfaces are non-planar, the directions of resolved shear stress in general give, according to the Wallace-Bott hypothesis, a set of slip directions of rigid fault blocks, which is generally kinematically incompatible. Finally, a simple model of a corrugated fault suggests that any anisotropy of the shear strength of the fault such as that arising from fault surface topography, can lead to a significant angular difference between the directions of maximum shear stress and the slip direction.These findings have relevance to the design of procedures used to estimate palaeostresses and the amount of data required for this type of analysis.

scholarly journals Influence of dimensionality on phase transition in VO2 nanocrystals

2013 ◽  
Vol 45 (3) ◽  
pp. 305-311 ◽  
Author(s):  
V.A. Blagojevic ◽  
N. Obradovic ◽  
N. Cvjeticanin ◽  
D.M. Minic
Keyword(s):  
Phase Transition ◽  
Activation Energy ◽  
Transition Temperature ◽  
Apparent Activation Energy ◽  
Phase Transition Temperature ◽  
Bulk Material ◽  
Two Dimensional ◽  
Lower Phase ◽  
One Dimensional ◽  
Simultaneous Movement

Hydrothermally synthesized one-dimensional and two-dimensional nanocrystals of VO2 undergo phase transition around 65?C, where temperature and mechanism of phase transition are dependent on dimensionality of nanocrystals. Both nanocrystalline samples exhibit depression of phase transition temperature compared to the bulk material, the magnitude of which depends on the dimensionality of the nanocrystal. One-dimensional nanoribbons exhibit lower phase transition temperature and higher values of apparent activation energy than two-dimensional nanosheets. The phase transition exhibits as a complex process with somewhat lower value of enthalpy than the phase transition in the bulk, probably due to higher proportion of surface atoms in the nanocrystals. High values of apparent activation energy indicate that individual steps of the phase transition involve simultaneous movement of large groups of atoms, as expected for single-domain nanocrystalline materials.

scholarly journals Stitchless support-free 3D printing of free-form micromechanical structures with feature size on-demand

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Linas Jonušauskas ◽  
Tomas Baravykas ◽  
Dovilė Andrijec ◽  
Tomas Gadišauskas ◽  
Vytautas Purlys
Keyword(s):  
3D Printing ◽  
Free Form ◽  
Complex Structures ◽  
Production Lines ◽  
Feature Size ◽  
Voxel Size ◽  
Translation Velocity ◽  
Micromechanical Structures ◽  
Simultaneous Movement ◽  
Good Agreement

AbstractFemtosecond laser based 3D nanolithography is a powerful tool for fabricating various functional micro- and nano-objects. In this work we present several advances needed to push it from the laboratory level use to the industrial production lines. First, linear stage and galvo-scanners synchronization is employed to produce stitch-free mm-sized structures. Furthermore, it is shown that by varying objective numerical apertures (NA) from 1.4 NA to 0.45 NA, voxel size can be tuned in the range from sub μm to tens of mm, resulting in structuring rates between 1809 μm3/s and 313312 μm3/s at 1 cm/s translation velocity achieved via simultaneous movement of linear stages and scanners. Discovered voxel/throughput scaling peculiarities show good agreement to ones acquired with numerical modeling. Furthermore, support-free 3D printing of complex structures is demonstrated. It is achieved by choosing pre-polymer that is in hard gel form during laser writing and acts as a dissolvable support during manufacturing. All of this is combined to fabricate micromechanical structures. First, 1:40 aspect ratio cantilever and 1.5 mm diameter single-helix spring capable of sustaining extreme deformations for prolonged movement times (up to 10000 deformation cycles) are shown. Then, free-movable highly articulated intertwined micromechanical spider and squids (overall size up to 10 mm) are printed and their movement is tested. The presented results are discussed in the broader sense, touching on the stitching/throughput dilemma and comparing it to the standard microstereolithography. It is shown where multiphoton polymerization can outpace standard stereolithography in terms of throughput while still maintaining superior resolution and higher degree of freedom in terms of printable geometries.

Movement patterns of lacertid lizards: effects of temperature on speed, pauses and gait in Lacerta vivipara

1989 ◽  
Vol 10 (1) ◽  
pp. 77-84 ◽  
Author(s):  
R.A. Avery ◽  
D.J. Bond
Keyword(s):  
Movement Patterns ◽  
Duty Factor ◽  
Lacertid Lizards ◽  
Activity Temperature ◽  
The Mean ◽  
Effects Of Temperature ◽  
Lacerta Vivipara ◽  
Simultaneous Movement

AbstractLacerta vivipara emerging from their overnight retreat before they had the opportunity to thermorcgulate moved with an alternation of locomotor bursts and pauses. Mean speed during bursts of locomotion fell with decreasing temperature from 3.21 snout-vent lengths (SVL) s-1 at the activity temperature (Tact ∼ 33°C) to 0.15 SVL s-1 at 5°C. Between Tact and 19°C the reduction was small (Q10 = 1.12) and statistically not significant; between 19°C and 5°C the change was very much greater (Q10 = 7.7). The pauses between locomotor bursts increased progressively in duration over the whole range of decreasing temperatures from Tact to 5°C, although the change from Tact to 23°C was not significant. Gait changed progressively from almost simultaneous movement of contralateral diagonal limbs at Tact to independent movement of limbs in the sequence LF, RH, RF, LH at 7°C, with increases in the mean duty factor of individual feet from 0.50 to 0.76 and in the proportion of time for which 3 or 4 feet were in simultaneous contact with the ground from 0 to 0.92.

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