Relationship between Frames of Reference and Mirror-Image Reversals

Perception ◽  
10.1068/p5529 ◽  
2007 ◽  
Vol 36 (7) ◽  
pp. 1049-1056 ◽  
Author(s):  
Hirokazu Yoshimura ◽  
Tatsuo Tabata

The mirror puzzle related to the perception of mirror images as left–right reversed can be more fully understood by considering an extended problem that includes also the perception of mirror images that are not left–right reversed. The purpose of the present study is to clarify the physical aspect of this extended problem logically and parsimoniously. Separate use of the intrinsic frame of reference that belongs to the object and one that belongs to its mirror image always leads to the perception of left–right reversal when the object has left–right asymmetry; on the other hand, the perception of left–right nonreversal is always due to the application of a common frame of reference to the object and its mirror image.

M n gement ◽  
2021 ◽  
pp. 1-22
Author(s):  
Anthony Hussenot

This article examines the emergence of organizational dynamics in the context of fluid organizational phenomena. To do so, three organizational dynamics are studied: (1) identity, (2) actorhood, and (3) interconnected instances of decision-making. To study how these three organizational dynamics take shape in the context of fluid organizational phenomena, I rely on the events-based approach and a case study of makers operating in a makerspace in the Paris region. The results show, on the one hand, that the collective of makers enacts a structure of past, present, and future events that participates in the definition of a common frame of reference and, on the other hand, that this common frame of reference plays a role in the emergence of organizational dynamics. On the basis of this result, my main contribution is to show the role of the eventalization – that is, the definition, configuration and narration by the actors of past, present, and future events – in the definition of organizational dynamics in fluid organizational phenomena. This article contributes on the one hand to the literature on fluid organizational phenomena, and on the other hand to the literature on makers working in makerspaces.


1961 ◽  
Vol 34 (2) ◽  
pp. 588-599 ◽  
Author(s):  
G. A. Blokh ◽  
Ch. L. Melamed

Abstract The experimental data collected on the interaction of active centers of carbon black with the rubber on the one hand and of the active centers of carbon black with the sulfur and accelerators, and also with the antioxidants, on the other hand, provide a sound basis for belief that the problem of reinforcement of rubber by active fillers in the process of vulcanization cannot be explained from the physical aspect alone. The facts indicate the considerable importance of the chemical reactions between the active groups of carbon black and the compounding ingredients in the course of vulcanization.


Author(s):  
Cristina Rivera ◽  
Caroline G.L. Cao

This work is an examination of barriers to communication between the attending and assisting surgeons during laparoscopic surgery, where the same image of the surgical site is viewed from different vantage points with respect to the patient. Part of the problem lies with the multiple frames of reference each surgeon holds, and the mental rotations each must perform to construct a common frame of reference for communication and collaborative work. An experiment was conducted to demonstrate the effects of display-control incongruency on the performance of an aiming task in a simulated laparoscopic environment. Aiming performance was best when the camera was oriented at 0° perspective and worsened as the angle of deviation from 0° increased. Performance was affected to a greater degree by viewing perspectives from the left of the subject than viewing perspectives from the right. Results also suggest that when surgeons are facing each other, as is the case in many laparoscopic surgeries, one surgeon's performance will be worse than the other's. The mismatched display-control perspectives are compounded by ambiguous spatial references in verbal communication. From these findings, a case can be made for the importance of vocabulary that forces a common frame of reference during laparoscopic surgery.


Author(s):  
Roberto Casales García

El discurso contemporáneo sobre los derechos humanos demanda para sí una fundamentación capaz de dar sustento de sus propios principios. Esta fundamentación se gesta a partir de dos modelos explicativos: por un lado, tenemos las éticas del discurso o procedimentales, cuya propuesta se centra en el estudio de todas aquellas condiciones de posibilidad del consenso racional, y, por otro lado, las éticas cuya estructura admite una fundamentación ontológica. La intención principal de este artículo es, por tanto, analizar ambas posturas a fin de mostrar que las éticas procedimentales presuponen un marco referencial ontológico, en virtud del cual es posible acceder al consenso racional.Contemporary speech about human rights requires to itself a foundation able to sustain its own principles. This foundation is brewing from two explicative models: in one hand we have got discursive or procedural ethics, which proposal is founded in the study of all those conditions of possibility of rational consensus, and, on the other hand, ethics which structure admits an ontological foundation. The purpose of this article is, therefore, to analyze both postures to demonstrate that procedural ethics presuppose an ontological frame of reference whereby is possible to accede to rational consensus.


1989 ◽  
Vol 41 (2) ◽  
pp. 250-273 ◽  
Author(s):  
Józef H. Przytycki

There is the nice formula which links the Alexander polynomial of (m, k)-cable of a link with the Alexander polynomial of the link [5] [36] [38]. H. Morton and H. Short investigated whether a similar formula holds for the Jones-Conway (Homfly) polynomial and they found that it is very unlikely. Morton and Short made many calculations of the Jones-Conway polynomial of (2, q)-cables along knots (2 was chosen because of limited possibility of computers) and they get very interesting experimental material [24], [25]. In particular they found that using their method they were able to distinguish some Birman [4] and Lozano-Morton [22] examples (all which they tried) and the 942 knot (in the Rolfsen [37] notation) from its mirror image. On the other hand they were unable to distinguish the Conway knot and the Kinoshita-Terasaka knot.


Gesture ◽  
2011 ◽  
Vol 11 (3) ◽  
pp. 271-307 ◽  
Author(s):  
Olivier Le Guen

This paper aims at providing a systematic framework for investigating differences in how people point to existing spaces. Pointing is considered according to two conditions: (1) A non-transposed condition where the body of the speaker always constitutes the origo and where the various types of pointing are differentiated by the status of the target and (2) a transposed condition where both the distant figure and the distant ground are identified and their relation specified according to two frames of reference (FoRs): the egocentric FoR (where spatial relationships are coded with respect to the speaker’s point of view) and the geocentric FoR (where spatial relationships are coded in relation to external cues in the environment). The preference for one or the other frame of reference not only has consequences for pointing to real spaces but has some resonance in other domains, constraining the production of gesture in these related domains.


Prospects ◽  
2001 ◽  
Vol 26 ◽  
pp. 611-638
Author(s):  
Robert M. Greenberg

In Articulating his artistic objectives for his fiction, V. S. Naipaul speaks in a 1994 interview about “delivering truth” and a “form of reality” (Hussein, 154). While he seems to be speaking about an idea of reality he shares with his readers, he is really only indicating his own subjective confidence about the significance of what he has created. He does not share a frame of reference about his Trinidad or Central Africa settings with many of his readers (especially his American readers), nor does he have any reason to assume that his novels will be accepted as culturally authoritative. Naipaul includes in his recipe for “pinning down reality (Hussein, 155) the search for and invention of the most revealing narrative. But again here he does not seem to be referring to a familiar pattern of events concerning a familiar world – for this he pejoratively designates the term “plot” and applies it to the stories of television dramas and “blockbuster” novelists. His means for exploring new strata of experience, on the other hand, is “narrative,” the formal orchestration of events in order to excavate and dramatize the most significant elements residing in his material (Hussein, 154–55; Schiff, 148).


Author(s):  
T. Pigoski ◽  
M. Griffis ◽  
J. Duffy

Abstract The stiffness mapping matrix for a planar compliant mechanism is analyzed using two different reference frames. The first is rigidly attached to the fixed body of the coupling, whilst the second is attached to the moving body of the coupling. It was found that, in general, these matrices are asymmetric when the coupling is loaded, and that one is the transpose of the other. This is an important result and can be considered an extension of the work done by Dimentberg[1], who derived a symmetrical stiffness mapping for an unloaded coupling. These new mappings are essential for the control of the coupling as it moves away from its unloaded position. Additionally, a third frame of reference which produces a symmetric mapping is examined and found to be identical to the Hessian matrix obtained from the second differentials of the elastic potential energy of the system. However, this symmetric mapping is not useful for control purposes and is only included to show that such a frame can be realized. Finally, static force loci for each of the reference frames are drawn to support the notion of frame-of-reference dependency.


Res Mobilis ◽  
2021 ◽  
Vol 10 (13-2) ◽  
pp. 54-99
Author(s):  
Antonio Sánchez Casado

It is necessary to have a frame of reference to understand the work of each cabinetmaker in the Royal House of Spain. This research on the Royal Cabinetmaking Workshops try to systematize its structure within the conglomerate of court artists and the relationship of each cabinetmaker with the royal administration. It is essential to know how these workshops were created, their purpose, who directed them, what their day-to-day life was like and how they disappeared. In this way, workshops, cabinetmakers and furniture have appeared that have not been given the importance they deserve. Dates and attributions are also corrected. On the other hand, the authorship of important furniture sets is justified and the ability of cabinetmakers to design their own furniture is once again demonstrated. In short, it is an approach to royal furniture delving into the crown production systems.


Zutot ◽  
2014 ◽  
Vol 11 (1) ◽  
pp. 6-17
Author(s):  
Yael Shenker

This article addresses Israeli novelist Haim Beʾer’s relation to national-religious identity and the rifts and the pain it causes him, as can be discerned from his fiction and journalism, and certainly from interviews with him. His relation to national-religious identity also reflects a sort of mirror image, at times inverted, of the relationship between religious and national identities. Beʾer’s movement between religious community and nation criticizes on the one hand prevalent conceptions of secularization and national identity in Zionist discourse, and, on the other hand, conceptions of redemption in religious discourse.


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