Phase-shift analysis is a commonly used technique to extract the scattering amplitudes of a two-body strong-interaction scattering process from the experimentally measured quantities | total cross-section, di erential cross-section, polarization and spin-correlation parameters. However, at a xed energy, all the scattering amplitudes can be multiplied by an arbitrary angle-dep phase-factor without a ecting the measurables. It would seem then that the phase of the..

This paper presents the results of optical interferometry experiments in which the phase of photons in one arm of a Mach-Zehnder interferometer is modified by applying a transverse constriction. An equivalent quantum interferometry experiment using neutron de Broglie waves is discussed in which the observed phase shift is in the spirit of the force-free phase shift of the Aharonov-Bohm effects. In the optical experiments the experimental results are in excellent agreement with predictions.

The main experiments concerning the Aharonov–Bohm phase shifts, seen in an electron interference pattern, and their Boyer semiclassical explanations are reviewed. A new experiment is also presented which emphasizes the subtleties involved in the interpretations of the magnetic Aharonov–Bohm phase shift as a result of a non-dispersive or dispersive effect.

The electron-optical phase shift induced in the electron beam due to the interaction with the electromagnetic field of magnetized nanoparticles of defined shape and arbitrary dimensions is calculated, presented and discussed. Together with the computable knowledge of vector potential and magnetic induction, including the demagnetizing field, and with the extension to more realistic geometries which will be presented in part II, this theoretical framework can be employed for the interpretation of transmission electron microscopy experiments on magnetic particles on (...) the nanometre scale. (shrink)

A method is presented to compute the electron-optical phase shift for a magnetized polyhedral nanoparticle, with either a uniform magnetization or a closure domain . The method relies on an analytical expression for the shape amplitude, combined with a reciprocal-space description of the magnetic vector potential. The model is used to construct two building blocks from which more complex structures can be generated. Phase computations are also presented for the five Platonic and 13 Archimedean solids. Fresnel and (...) Foucault imaging mode simulations are presented for a range of particle shapes and microscope imaging conditions. (shrink)

Recent experiments undertaken by Caprez, Barwick, and Batelaan should clarify the connections between classical and quantum theories in connection with the Aharonov–Bohm phase shift. It is pointed out that resistive aspects for the solenoid current carriers play a role in the classical but not the quantum analysis for the phase shift. The observed absence of a classical lag effect for a macroscopic solenoid does not yet rule out the possibility of a lag explanation of the observed (...) phase shift for a microscopic solenoid. (shrink)

Although there is good experimental evidence for the Aharonov–Bohm phase shift occurring when a solenoid is placed between the beams forming a double-slit electron interference pattern, there has been very little analysis of the relevant classical electromagnetic forces. These forces between a point charge and a solenoid involve subtle relativistic effects of order v 2 /c 2 analogous to those discussed by Coleman and Van Vleck in their treatment of the Shockley–James paradox. In this article we show that (...) a treatment exactly analogous to that given by Coleman and Van Vleck predicts classical electromagnetic forces which provide the basis for the Aharonov–Bohm phase shift. The magnetic force on the solenoid due to the passing charge leads to a displacement of the solenoid center of energy which must be balanced by the displacement of the passing charge. This classical displacement of the passing charge is exactly what is required to account for the Aharonov–Bohm phase shift. Also, we discuss a magnetic moment model which appears frequently in the literature and note that although the model provides conservation of linear momentum, it does not satisfy the general requirements for relativistic theories. We give an example suggesting that the new equation of motion for a magnetic moment proposed by Aharonov, Pearle, and Vaidman based upon the hidden momentum of the magnetic moment is completely inappropriate. Finally, we emphasize that the Aharonov–Casher phase shift is also explained by classical electromagnetic forces exactly parallel to those explaining the Aharonov–Bohm phase shift. (shrink)

Classical electromagnetic forces can account for the experimentally observed phase shifts seen in an electron interference pattern when a line of electric dipoles or a line of magnetic dipoles (a solenoid) is placed between the electron beams forming the interference pattern.

A fundamentally new understanding of the classical electromagnetic interaction of a point charge and a magnetic dipole moment through order v 2 /c 2 is suggested. This relativistic analysis connects together hidden momentum in magnets, Solem's strange polarization of the classical hydrogen atom, and the Aharonov–Bohm phase shift. First we review the predictions following from the traditional particle-on-a-frictionless-rigid-ring model for a magnetic moment. This model, which is not relativistic to order v 2 /c 2 , does reveal a (...) connection between the electric field of the point charge and hidden momentum in the magnetic moment; however, the electric field back at the point charge due to the Faraday-induced changing magnetic moment is of order 1/c 4 and hence is negligible in a 1/c 2 analysis. Next we use a relativistic magnetic moment model consisting of many superimposed classical hydrogen atoms (and anti-atoms) interacting through the Darwin Lagrangian with an external charge but not with each other. The analysis of Solem regarding the strange polarization of the classical hydrogen atom is seen to give a fundamentally different mechanism for the electric field of the passing charge to change the magnetic moment. The changing magnetic moment leads to an electric force back at the point charge which (i) is of order 1/c 2 , (ii) depends upon the magnetic dipole moment, changing sign with the dipole moment, (iii) is odd in the charge q of the passing charge, and (iv) reverses sign for charges passing on opposite sides of the magnetic moment. Using the insight gained from this relativistic model and the analogy of a point charge outside a conductor, we suggest that a realistic multi-particle magnetic moment involves a changing magnetic moment which keeps the electromagnetic field momentum constant. This means also that the magnetic moment does not allow a significant shift in its internal center of energy. This criterion also implies that the Lorentz forces on the charged particle and on the point charge are equal and opposite and that the center of energy of each moves according to Newton's second law F=Ma where F is exactly the Lorentz force. Finally, we note that the results and suggestion given here are precisely what are needed to explain both the Aharonov–Bohm phase shift and the Aharonov–Casher phase shift as arising from classical electromagnetic forces. Such an explanation reinstates the traditional semiclassical connection between classical and quantum phenomena for magnetic moment systems. (shrink)

Zeilinger's observation that phenomena of the Aharonov-Bohm type lead to non-dispersive, i.e., energy-independent, phase shifts in interferometers is generalized in a new proof which shows that the precise condition for nondispersivity is a force-free interaction. The converse theorem is disproved by a conceptual counter-example. Applications to several nondispersive interference phenomena are reviewed briefly. Those fall into two classes which are objectively distinct from each other in that in the first class phase shifts depend only on the topology of (...) the interfering beam paths, while in the second class force-free physical interactions take place at identifiable points along the path. Apparent disagreements in the literature about the topological nature of the phenomena in the second class stem from differing definitions. (shrink)

The energy-spectrum of two point-like particles interacting in a 3-D isotropic Harmonic Oscillator (H.O.) trap is related to the free scattering phase-shifts $\delta$ of the particles by a formula first published by Busch et al. It is here used to find an expression for the shift of the energy levels, caused by the interaction, rather than the perturbed spectrum itself. In the limit of high energy (large quantum number $n$ of the H.O.) this shift (in H.O. (...) units) is shown to be given by $\Delta =-2\frac{\delta }{\pi }$ , also exact in the limit of infinite scattering length ( $\delta =\pm \frac{\pi }{2}$ ) in which case $\Delta =\mp 1$ . Numerical investigation shows that this expression otherwise differs from the exact result of Busch et al., by less than $\frac{1}{2}\,\%$ except for $n=0$ when it can be as large as $\approx$ 2.5 %. This result for the energy-shift is well known from another exactly solvable model, namely that of two particles interacting in a spherical infinite square-well trap (or box) of radius $R$ in the limit $R\rightarrow \infty$ , and/or in the limit of large energy. It is in solid state physics referred to as Fumi’s theorem. It can be (and has been) used in (infinite) nuclear matter calculations to calculate the two-body effective interaction in situations where in-medium effects can be neglected. It is in this context referred to as the phase-shift approximation a term also used throughout this report. (shrink)

The numerical study of a glycolytic model formed by a system of three delay differential equations reveals a multiplicity of stable coexisting states: birhythmicity, trirhythmicity, hard excitation and quasiperiodic with chaotic regimes. For different initial functions in the phase space one may observe the coexistence of two different quasiperiodic motions, the existence of a stable steady state with a stable torus, and the existence of a strange attractor with different stable regimes (chaos with torus, chaos with bursting motion, and (...) chaos with different periodic regimes). For a single range of the control parameter values our system may exhibit different bifurcation diagrams: in one case a Feigenbaum route to chaos coexists with a finite number of successive periodic bifurcations, in other conditions it is possible to observe the coexistence of two quasiperiodicity routes to chaos. These studies were obtained both at constant input flux and under forcing conditions. (shrink)

Robertson's earlier work, The New Renaissance projected the likely future impact of computers in changing our culture. Phase Change builds on and deepens his assessment of the role of the computer as a tool driving profound change by examining the role of computers in changing the face of the sciences and mathematics. He shows that paradigm shifts in understanding in science have generally been triggered by the availability of new tools, allowing the investigator a new way of seeing into (...) questions that had not earlier been amenable to scientific probing. (shrink)

This paper presents a polarized phase semantics, with respect to which the linear fragment of second order polarized linear logic of Laurent [15] is complete. This is done by adding a topological structure to Girard's phase semantics [9]. The topological structure results naturally from the categorical construction developed by Hamano—Scott [12]. The polarity shifting operator ↓ (resp. ↑) is interpreted as an interior (resp. closure) operator in such a manner that positive (resp. negative) formulas correspond to open (resp. (...) closed) facts. By accommodating the exponentials of linear logic, our model is extended to the polarized fragment of the second order linear logic. Strong forms of completeness theorems are given to yield cut-eliminations for the both second order systems. As an application of our semantics, the first order conservativity of linear logic is studied over its polarized fragment of Laurent [16]. Using a counter model construction, the extension of this conservativity is shown to fail into the second order, whose solution is posed as an open problem in [16]. After this negative result, a second order conservativity theorem is proved for an eta expanded fragment of the second order linear logic, which fragment retains a focalized sequent property of [3]. (shrink)

Multiple theories of problem-solving hypothesize that there are distinct qualitative phases exhibited during effective problem-solving. However, limited research has attempted to identify when transitions between phases occur. We integrate theory on collaborative problem-solving with dynamical systems theory suggesting that when a system is undergoing a phase transition it should exhibit a peak in entropy and that entropy levels should also relate to team performance. Communications from 40 teams that collaborated on a complex problem were coded for occurrence of problem-solving (...) processes. We applied a sliding window entropy technique to each team's communications and specified criteria for identifying data points that qualify as peaks and determining which peaks were robust. We used multilevel modeling, and provide a qualitative example, to evaluate whether phases exhibit distinct distributions of communication processes. We also tested whether there was a relationship between entropy values at transition points and CPS performance. We found that a proportion of entropy peaks was robust and that the relative occurrence of communication codes varied significantly across phases. Peaks in entropy thus corresponded to qualitative shifts in teams’ CPS communications, providing empirical evidence that teams exhibit phase transitions during CPS. Also, lower average levels of entropy at the phase transition points predicted better CPS performance. We specify future directions to improve understanding of phase transitions during CPS, and collaborative cognition, more broadly. (shrink)

Many commentators have expressed concern that large investments in biomedical research over the past two decades have not been translated effectively into clinical applications. In its Critical Path Report, the Food and Drug Administration characterized the problem as a “technological disconnect between discovery and the product development process,” and documented that the number of investigational new drugs submitted to the agency had declined “significantly” since 2000. Along a similar vein, another study found that only five of 101 basic science studies (...) showing significant therapeutic promise were successfully translated into clinical applications.This perceived translational lag is stimulating a shift toward human testing of study interventions earlier in the drug development process. One indication of this trend is a recent guidance encouraging sponsors to pursue human “exploratory” studies before embarking on phase I trials. (shrink)

Phase 1 healthy volunteer clinical trials—which financially compensate subjects in tests of drug toxicity levels and side effects—appear to place pressure on each joint of the moral framework justifying research. In this article, we review concerns about phase 1 trials as they have been framed in the bioethics literature, including undue inducement and coercion, unjust exploitation, and worries about compromised data validity. We then revisit these concerns in light of the lived experiences of serial participants who are income-dependent (...) on phase 1 trials. We show how participant experiences shift attention from discrete exchanges, behaviors, and events in the research enterprise to the ongoing and dynamic patterns of serial participation in which individual decision-making is embedded in collective social and economic conditions and shaped by institutional policies. We argue in particular for the ethical significance of structurally diminished voluntariness, routine powerlessness in setting the terms of exchange, and incentive structures that may promote pharmaceutical interests but encourage phase 1 healthy volunteers to skirt important rules. (shrink)

ABSTRACTThis article provides an insight into the changing role of businesses in dealing with the natural environment issues. From being regarded as poachers of the natural environment, many businesses have now started to position themselves as gamekeepers of the natural environment. This article traces the events and factors that have contributed toward this shift. The article starts with an introduction to the current state of the natural environment. It then discusses the role that businesses have traditionally played in contributing (...) toward the rapid deterioration of the natural environment. The article then traces the events that have gradually resulted in businesses accepting that they have a responsibility to address environmental issues. This is followed by an overview of the business responses, to the risks and opportunities, posed by changes in the natural environment. The article then provides a brief overview of the various phase models that attempt to categorize business responses to environmental issue. The conclusion focuses on the challenges that lie ahead. (shrink)

— We prescnt here a comparative study on the decay of chlorophyll a fluorescence yield in thylakoid membranes and photosystem 11 ‐enriched samples, measured with multifrequency cross‐correlation phase fluorometry. These measurements confirm the general conclusions of Van Mieghem ef al., obtained with a flash method, on the effects of reduction of the primary quinone acceptor on ChI a fluorescence yield of PSI. Different states of the reaction centers of PSII were produced by: pretreatment with sodium dithionite and mcthyl viologen (...) followed by laser illumination: the doubly reduced QA centers: with laser illumination or pretreatment with diuron: QA‐ centers; and the addition of micromolar concentration of dichlorobenzoquinonc : oxidized QA centers. The data were analyzed with Lorentzian distribution as well as with multiexponential fluorescence decay functions. The analysis with Lorcntzian distribution function showed that upon formation of QA. the major lifetime distribution peak shifted to longer lifetimes: from 0.25 ns to 1.66 ns and from 0.24 ns to 1.31 ns. However, when QAHZ was formed, the lifetime distribution peaks shifted back to shorter lifetimes both in thylakoids and PSIl membranes. Multiexponential analysis showed three lifetime components: fast, middle and slow. When QA was formed in PS11 centers, the amplitude of the fast Component decreased, but both thc amplitude and the lifetime of the middle component increased severalfold. However, when QA was doubly reduccd, the amplitude of the fast component increased and the amplitude of the middle component decreased: in addition, the lifetime of the slow component increased. All of the above results are consistent with the conclusions that PS11 charge separation is decreased when QA is formed and increased when doubly reduced QA is formed. Copyright © 1993, Wiley Blackwell. All rights reserved. (shrink)

A generic non-conservative force, applied to an interferometer particle for a period in the past and then turned off, leaves stationary phase and fringe shifts in the now force-free interferometer. Both Aharonov-Bohm and Aharonov-Casher topological phase and fringe shifts can be created in this way. The specific sources of the non-conservative forces behind Aharonov-Bohm and Aharonov-Casher stationary fringe shifts are, respectively, Faraday induction fields and Maxwell displacement currents, now off.

Scholarship on corporate political activity (CPA) has remained largely silent on the substance of information strategies that firms utilize to influence policymakers. To address this deficiency, our study is situated in the European Union (EU), where political scientists have noted information strategies to be central to achieving lobbying success; the EU also provides a context of global norm-setting activities, especially with its General Data Protection Regulation (GDPR). Aided by recent advances in the field of unsupervised machine learning, we performed a (...) structural topic model analysis of the entire set of lobby documents submitted during two GDPR consultations, which were obtained via a so-called Freedom of Information request. Our analysis of the substance of information strategies reveals that the two policy phases constitute “shifting battlegrounds,” where firms first seek to influence what is included and excluded in the legislation, after which they engage the more specific interests of other stakeholders. Our main theoretical contribution concerns the identification of two distinct information strategies. Furthermore, we point at the need for more attention for institutional procedures and for the role of other stakeholders’ lobbying activities in CPA research. (shrink)

The paper examines Walton‘s concept of fallacy as it develops throughthree stages of his work: from the early series of papers co-authored withJohn Woods; through a second phase of involvement with thepragma-dialectical perspective; and on to the final phase in which heoffers a distinct pragmatic theory that reaches beyond the perceived limitsof the pragma-dialectical account while still exhibiting a debt to thatperspective and the early investigations with Woods. It is observed how Walton‘s model of fallacy is established in (...) distinction to its competitors,and its various problems and successes are discussed. (shrink)

Most phase III clinical trials today are explanatory. Because explanatory, or efficacy, trials test hypotheses under “ideal” conditions, they are not well suited to providing guidance on decisions made in most clinical care contexts. Pragmatic trials, which test hypotheses under “usual” conditions, are often better suited to this task. Yet, pragmatic, or effectiveness, trials are infrequently carried out. This mismatch between the design of clinical trials and the needs of health care professionals is frustrating for everyone involved, and explains (...) some of the challenges inherent in attempts to enhance knowledge translation and encourage evidence-based practice. The situation is more than simply frustrating, however; it is potentially unethical. Clinical trials must be socially valuable in order to (1) warrant the risks they impose on human research subjects and (2) fairly and efficiently assess new clinical interventions. Most bioethicists would agree that trials that have no social value, for instance, because their results do not have the potential to advance clinical care, should not be performed. What is less widely appreciated is that given limited research resources, trials that are more socially valuable should be preferred to trials that are less socially valuable when all else is equal. With respect to clinical trial design, I argue that while explanatory trials often have some social value, many have less social value than their pragmatic counterparts. On the basis of this general ethical assessment, I provide a preliminary defense of the position that clinical researchers should aim to conduct pragmatic trials, that is, that researchers face a burden of justification related to any idealizing elements added to trial designs. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Night ShiftCalvin R. GrossI don't like working at night anymore. Too much goes wrong when you're alone.I'm sitting at my desk in the middle of the cardiac intensive care unit, and it's far later than I'd like to be awake—two or three in the morning. Things are calm, almost pleasant. I can hear the occasional alarm going off—an imperfectly positioned blood pressure cuff, a pulse oximeter with a poor (...) waveform, a ventilator with secretions in it. The night's initial frenzied work is done; my new admissions are tucked away, and my overnight to-dos are completed. Now it's just time to sit and wait. I could sleep, but despite the calm, I'm too afraid to leave the unit to rest. The fellow has gone to bed hours ago, and now it's just me. Sure, I'm surrounded by experienced nurses who know their work well, but somehow, I'm the one in charge. A brand-new second-year resident, the only doctor there. I'm no intern, that's for sure, but I've never led a code before, and I've only ever placed one central line without supervision. As second years go, I'm as fresh as they come.The daytime, you see, is far different than nights. There's a large (and even bloated) team of two attendings, two fellows, two pharmacists, and more importantly, multiple other residents. When you don't know what to do for a patient, there's always someone there to bounce ideas off of. When something difficult or surprising happens, there are peers and mentors to process with. At night, it's the opposite—no peers, no mentors, only a group of experienced nurses, whose circle is closed to me, the outsider. I long to be a part of that large and bloated daytime team."Can you come into 23? I think his pupils are a different size."I'm startled out of my thoughts. 23 … All I can remember from sign-out that evening is that he's young, close to my age, and supposedly stable. I look at my notes, a catalogue of tragedies: early onset heart failure, multiple prior suicide attempts, intubated because of pulmonary edema, and a left-ventricular assist device (LVAD) that's malfunctioning. I walk over to the room and look at the nurse at the other side of the bed. She's in the early phases of her career too—less than a year on the job—but she's still more experienced than me. I take a flashlight, open his eyelids, and look at the pupils. Sure enough, one of them is much larger than the other. When I shine the light into each eye, the large one doesn't change. When I turn his head from side to side, his eyes stay fixed. We look [End Page 83] at each other, she and I. We both know something terrible is happening."Should we maybe wake the fellow up?" she asks tentatively.I nod my head in agreement, glad to have been offered a suggestion. It's the right thing to do. I walk to the fellow's call room, knock on the door, and wake him up. He's set to work 24 hours and would like nothing more than to keep resting. He sleepily comes with me to the bedside, looks at the pupils as well, and says, "With the sedation on, your exam isn't going to be the most accurate. We should start by scanning his head, and then go from there. Wake me back up if you need me, but I know you've got this one."I don't think that I deserve the confidence he has in me. I walk back to my desk, open the patient's chart, and place the order for an urgent CT scan. The machinery of the hospital starts to rumble as the imaging schedulers find a spot in the queue for the scan, the patient's nurse and respiratory therapist disconnect and reconnect cables and tubes, the technicalities of the scan are ironed out, and he is... (shrink)

The transition in Kant's writings form a pre-critical to a critical standpoint has been thoroughly documented with regard to Kant's changing conception of metaphysics, theory of knowledge, and philosophy of mathematics. But a similar alteration in standpoint in Kant's philosophy of logic has received little or no attention. This paper documents the existence of this shift in Kant's philosophy of logic and examines its nature. The resulting analysis provides evidence for the thesis that Kant began with a strictly intensional (...) term logic and with a theory of inference based on the analytic composition of concepts, and ended with a view of logic which, while remaining fundamentally intensional and term-based, shows movement towards a logic of propositions and propositional connectives. (shrink)

This paper describes a theoretical framework of ecological phase transitions for modeling tree-grass dynamics and analyzing the shifts or phase transitions from one vegetation structure to another in the southern Texas landscape. This framework implements the integration of percolation theory, fractal geometry and phase transition theory as a method for modeling the spatial patterns of tree-grass dynamics, and nonlinear Markov non-equilibrium thermodynamic stability theory as a method for characterizing temporal tree-grass dynamics and phase transition. An historical (...) sequence of aerial photographs at a Prosopis - thornscrub savanna parkland site in southern Texas was used to determine the parameters of the models. The preliminary analytical result accords well with current understanding and field survey of vegetation dynamics in the southern Texas landscape. The potential of such approaches and other relevant theories such as self-organized criticality and synergetics to vegetation dynamics is also discussed. (shrink)

Writing is frequently analyzed as a mode of communication. But writing can be done for personal reasons, to remind oneself of things to do, of thoughts, of events. The cellphone has revealed this shift, commencing as a communication device and ending up as a memory prosthesis that records what we see, hear, read and think. The recordings are not necessarily for communicating a message to others, but sometimes just for oneself. Today, when machine learning algorithms read, write and transmit, (...) a new mode of communication arises that is not centered on the human. In this chapter the various phases of modern writing are modeled according to postphenomenology. As a branch of philosophy of technology, postphenomenology offers a set of analytical tools to study technologies and our relations to them. One of its central frameworks is the scheme of “I–technology–world.” The author proposes some modifications so that the scheme can systematically model the changes in the humans users, in machine learning algorithms imbued with non-human cognition and in the environments of readers, interlocutors and contexts. (shrink)

The established scholarly perspective on the relationship between F.W.J. Schelling’s Naturphilosophie and Neoplatonic metaphysics is underdeveloped. This perspective asserts that Schelling consistently distances himself from the emanation-based framework of Neoplatonism along with its construction of matter (ὕλη) as completely passive, purely potential, and spectrally obscure. Such a hermeneutic emerges from a close reading of Schelling’s 1794 Timaeus commentary as well as his 1811–1815 Weltalter drafts. I mark my intervention at the temporal midpoint of this range (1804–1806), namely during the final (...) throes of Schelling’s Identitätsphilosophie. At this point in Schelling’s intellectual itinerary, he discloses a proximity between his conceptual configuration of matter (die Materie) and the aforementioned, Neoplatonic conceptual configuration of matter. Insofar as heretofore erudition has overlooked the denouement of Schelling’s early philosophical phase, it has also neglected Schelling’s coquettish attitude toward Neoplatonism and its ontological destitution of matter. I intend to highlight the overlap between these respective approaches. (shrink)

In this paper, we examine how organizations’ impression management evolves in response to rising stakeholder pressures regarding organizations’ corporate responsibility initiatives. We conducted a comparative case study analysis over a period of 13 years for two organizations—Exxon and BP—that took extreme initial stances on climate change. We found that as stakeholder pressures rose, their IM tactics unfolded in four phases: advocating the initial stance, sensegiving to clarify the initial stance, image repairing, and adjusting the stance. Taken together, our analysis of (...) IM over these four phases provides three key insights about the evolution of IM in the face of rising pressures. First, when faced with stakeholder pressures, it seems that organizations do not immediately resort to conforming but tend to give in gradually when pressures increase and start to come from relatively powerful stakeholders. Second, evolution of IM seems to be characterized by path dependence, i.e., even as organizations’ positions evolve, they continue to show their conviction in their initial positions and try to convey that their subsequent positions flow logically from the previous ones. Finally, IM involves navigation between symbolism and substance, and companies tend to strive toward harmonizing their symbolic and substantive actions as stakeholder pressure increases. (shrink)

In this paper, we examine how organizations’ impression management evolves in response to rising stakeholder pressures regarding organizations’ corporate responsibility initiatives. We conducted a comparative case study analysis over a period of 13 years for two organizations—Exxon and BP—that took extreme initial stances on climate change. We found that as stakeholder pressures rose, their IM tactics unfolded in four phases: advocating the initial stance, sensegiving to clarify the initial stance, image repairing, and adjusting the stance. Taken together, our analysis of (...) IM over these four phases provides three key insights about the evolution of IM in the face of rising pressures. First, when faced with stakeholder pressures, it seems that organizations do not immediately resort to conforming but tend to give in gradually when pressures increase and start to come from relatively powerful stakeholders. Second, evolution of IM seems to be characterized by path dependence, i.e., even as organizations’ positions evolve, they continue to show their conviction in their initial positions and try to convey that their subsequent positions flow logically from the previous ones. Finally, IM involves navigation between symbolism and substance, and companies tend to strive toward harmonizing their symbolic and substantive actions as stakeholder pressure increases. (shrink)

Behind the economic turbulence and political transformations of recent decades is the transition from the nationstate phase of world capitalism to a new transnational phase. While many detractors of globalization focus on global trade, the process is driven by the transnationalization of capital ownership, which in turn leads to the rise of a transnational bourgeoisie that sits at the apex of the global order. Parallel to the transatlantic and transpacific integration of capital there has been an integration of (...) Southern capitalists into the emergent system of transnational capital. A transnational hegemony is replacing a declining U. S. hegemony, although supra-national structures are still not capable of providing the economic regulation and political conditions for global capitalism to function smoothly. In this period of extraordinary conflict, upheaval, and uncertainty, the role of popular classes will be crucial. But their struggles must take on a transnational perspective and engage in transnational organizing. (shrink)

In Marx’s analysis of capitalism, time and motion are central to the dynamics of the system. In the twenty-first century, capital deployed new forms of technology and logistical planning to increase profits and reduce the circulation phase of the turnover time of capital. The introduction of fibre optic cable, data centres, the transformation of the warehouse into a site of movement, the rise of third-party logistics (3PL) firms, and improvements in infrastructure all promoted ‘the annihilation of space by time’ (...) in the effort to increase profitability. As increased velocity of value became central to capital, the system in turn became more vulnerable to disruption by labour. (shrink)

The Aharonov–Bohm phase shift in a particle interference pattern when electrons pass a long solenoid is identical in form with the optical interference pattern shift when a piece of retarding glass is introduced into one path of a two-beam optical interference pattern. The particle interference-pattern deflection is a relativistic effect of order $$1/c^{2}$$, though this relativity aspect is rarely mentioned in the literature. Here we give a thorough analysis of the classical electromagnetic aspects of the interaction between (...) a solenoid or toroid and a charged particle. We point out the magnetic Lorentz force which the solenoid or toroid experiences due to a passing charge. Although analysis in the rest frame of the solenoid or toroid will involve back Faraday fields on the charge, the analysis in the inertial frame in which the charge is initially at rest involves forces due to only electric fields where forces are equal in magnitude and opposite in direction. The classical analysis is made using the Darwin Lagrangian. We point out that the classical analysis suggests an angular deflection independent of Planck’s constant $$\hbar$$, where the deflection magnitude is identical with that given by the traditional quantum analysis, but where the deflection direction is unambiguous. (shrink)

We expand and transform our habitual agency with countless technologies most moments of the day. Our environments, bodies, thoughts and social interactions are thoroughly shaped and mediated by tapestries of interweaving layers of old and new technologies. Perhaps this intimate relation with technology is at the core of our humanity. But our relation to technology has also repeatedly been feared as a Faustian deal that will be the dystopian end of us, or—in more utopian viewpoints— will bring us beyond our (...) earthbound finitudes toward virtual existences. What many agree on is that dramatic changes to our basic ecological and existential conditions are nearing. I suggest we should look for such critical tipping points and phase shifts not just in our biological bodies and environments but also in the informational and behavioral environments we rely on in our intentional and habitual agency. When thinking particularly about technologically mediated habitual agency an obvious place to start is with Don Ihde’s 4 classic human–technology relations. Interestingly, fellow post-phenomenologist Peter- Paul Verbeek has proposed new additional kinds of relations to e.g. “smart”and virtually “augmenting” technologies. While I find each of these analyses insightful, I worry that a focus on individual relations to particular spatio-temporally circumscribed artifacts falls short—or even obscures—some of the particular new challenges to our agency that networked, and data-driven smart technologies give rise to. I will therefore attempt to broaden the focus to how our agency is scaffolded by not just particular technological artifacts, but by our understanding of the broader informational and behavioral environment. To do this, I start by introducing some core theoretical background ideas that will support a more contextual approach and then proceed to consider both the classic and newer post-phenomenological relations from this more contextual perspective. The goal is not only to affirm the value of analyzing concrete technology relations but also to expand and contextualize the analyses. The latter is key if we want a post-phenomenological analysis that can help us understand how our habitual agency might be transformed as we come to live in increasingly “smart worlds”. These new data and algorithmically driven technologies not only transform our relation to a given context, but due to networked dataflows and “smart” decision-making (1) recursively act on us and (2) collapse and transcend the present context. This chapter will also highlight the uncertainties that informationally leaky and “smart” technologies introduce to our understanding of the kind of affordance space we are in and even what the expected outcomes of our actions will be. I suggest that technology relations with such effects might challenge some of the core contextual stabilities and informational segregations that our habitual agency have hitherto relied on. A further issue is if these new technological configurations challenge our habitual processes in ways we cannot easily adapt to. We certainly seem able to create new habits and adapt to these new technologies locally, but the new information flows, hidden audiences, and context collapses appear to challenge some conditions of agency that are typically out of sight, and the effects of which untraceably shows up well outside the present context. Overall, I shall argue that “smart” technologies can both expand and shrink our habitual agency—but that in terms of our ability to guide our action through various contexts in a perceived world something more fundamental appears to be breaking. (shrink)

We draw a distinction between the Aharonov–Bohm phase shift and the Aharonov–Bohm effect. Although the Aharonov–Bohm phase shift occurring when an electron beam passes around a magnetic solenoid is well-verified experimentally, it is not clear whether this phase shift occurs because of classical forces or because of a topological effect occurring in the absence of classical forces as claimed by Aharonov and Bohm. The mathematics of the Schroedinger equation itself does not reveal the physical (...) basis for the effect. However, the experimentally observed Aharonov–Bohm phase shift is of the same form as the shift observed due to electrostatic forces for which the consensus view accepts the role of the classical forces. The Aharonov–Bohm phase shift may well arise from classical electromagnetic forces which are simply more subtle in the magnetic case since they involve relativistic effects of the order v 2 /c 2 . Here we first review the experimentally observable differences between phenomena arising from classical forces and phenomena arising from the quantum topological effect suggested by Aharonov and Bohm. Second we point out that most discussions of the classical electromagnetic forces involved when a charged particle passes a solenoid are inaccurate because they omit the Faraday induction terms. The subtleties of the relativisitic v 2 /c 2 classical electromagnetic forces between a point charge and a solenoid have been explored by Coleman and Van Vleck in their analysis of the Shockley–James paradox; indeed, we point out that an analysis exactly parallel to that of Coleman and Van Vleck suggests that the Aharonov–Bohm phase shift is actually due to classical electromagnetic forces. Finally we note that electromagnetic velocity fields penetrate even excellent conductors in a form which is unfamiliar to many physicists. An ohmic conductor surrounding a solenoid does not screen out the magnetic field of the passing charge, but rather the time-integral of the magnetic field is an invariant; this time integral is precisely what is involved in the classical explanation of the Aharonov–Bohm phase shift. Thus the persistence of the Aharonov–Bohm phase shift when the solenoid is surrounded by a conductor does not exclude a classical force-based explanation for the phase shift. At present there is no experimental evidence for the Aharonov–Bohm effect. (shrink)

Parents influence the development of their offspring in many ways beyond the transmission of DNA. This includes transfer of epigenetic states, nutrients, antibodies and hormones, and behavioural interactions after birth. While the evolutionary consequences of such nongenetic inheritance are increasingly well understood, less is known about how inheritance mechanisms evolve. Here, we present a simple but versatile model to explore the adaptive evolution of non-genetic inheritance. Our model is based on a switch mechanism that produces alternative phenotypes in response to (...) different inputs, including genes and non-genetic factors transmitted from parents and the environment experienced during development. This framework shows how genetic and non-genetic inheritance mechanisms and environmental conditions can act as cues by carrying correlational information about future selective conditions. Differential use of these cues is manifested as different degrees of genetic, parental or environmental morph determination. We use this framework to evaluate the conditions favouring non-genetic inheritance, as opposed to genetic determination of phenotype or within-generation plasticity, by applying it to two putative examples of adaptive non-genetic inheritance: maternal effects on seed germination in plants and transgenerational phase shift in desert locusts. Our simulation models show how the adaptive value of non-genetic inheritance depends on its mechanism, the pace of environmental change, and life history characteristics. (shrink)

A macroscopic realization of the peculiar virtual particles is presented. The classical Helmholtz and the Schrödinger equations are differential equations of the same mathematical structure. The solutions with an imaginary wave number are called evanescent modes in the case of elastic and electromagnetic fields. In the case of non-relativistic quantum mechanical fields they are called tunneling solutions. The imaginary wave numbers point to strange consequences: The waves are non-local, they are not observable, and they are described as virtual particles. During (...) the last two decades QED calculations of the solutions with an imaginary wave number have been experimentally confirmed for phonons, photons, and electrons. The experimental proofs of the predictions of non-relativistic quantum mechanics and the Wigner phase time approach for the elastic, electromagnetic and Schrödinger fields will be presented in this article. The results are zero time in the barrier and an interaction time (i.e. a phase shift) at the barrier interfaces. The measured tunneling time scales approximately inversely with the particle energy. Actually, the tunneling time is given only by the barrier boundary interaction time, as zero time is spent inside a barrier. (shrink)

The perception of brightness differences in Ehrenstein figures and of illusory contours in phase-shifted line gratings was investigated as a function of the contrast polarity of the inducing elements. We presented either continuous lines or line-like arrangements composed of aligned dashes or dots whose spacing was varied. A yes/no procedure was used in which naive observers had to decide whether or not they perceived a brightness difference in a given Ehrenstein figure or an illusory contour in a phase-shifted (...) line grating. The results show that brightness differences are perceived to some extent in Ehrenstein figures with inducers of opposite polarity of contrast; however, the percentage of yes response was systematically lower and response times were longer than for figures with inducers of the same polarity. Phase-shifted line gratings with lines of opposite polarity of contrast yielded stronger illusory contours and shorter response times than those with lines of the same polarity. When the sign of contrast was not the same within a given line of induction, neither differences in brightness nor illusory contours were perceived. The results suggest that the mechanisms that lead to apparent differences in brightness are more sensitive to input of the same contrast polarity, the mechanisms generating illusory contours more sensitive to input of opposite polarity. The data are discussed in the light of a multistage approach to illusory form perception and some implications for cortical models of illusory contour integration are discussed. (shrink)

Patients with schizophrenia have a higher risk of cardiovascular diseases and higher mortality from them than does the general population; however, the underlying mechanism remains unclear. Impaired cerebral autoregulation is associated with cerebrovascular diseases and their mortality. Increased or decreased cerebral blood flow in different brain regions has been reported in patients with schizophrenia, which implies impaired cerebral autoregulation. This study investigated the cerebral autoregulation in 21 patients with schizophrenia and 23 age- and sex-matched healthy controls. None of the participants (...) had a history of cardiovascular diseases, hypertension, or diabetes. All participants underwent 10-min blood pressure and cerebral blood flow recording through finger plethysmography and Doppler ultrasonography, respectively. Cerebral autoregulation was assessed by analyzing two autoregulation indices: the mean blood pressure and cerebral blood flow correlation coefficient (Mx), and the phase shift between the waveforms of blood pressure and cerebral blood flow determined using transfer function analysis. Compared with the controls, the patients had a significantly higher Mx (0.257 vs. 0.399, p = 0.036) and lower phase shift (44.3° vs. 38.7° in the 0.07–0.20 Hz frequency band, p = 0.019), which indicated impaired maintenance of constant cerebral blood flow and a delayed cerebrovascular autoregulatory response. Impaired cerebral autoregulation may be caused by schizophrenia and may not be an artifact of coexisting medical conditions. The mechanism underlying impaired cerebral autoregulation in schizophrenia and its probable role in the development of cerebrovascular diseases require further investigation. (shrink)

Arguably one of the most fundamental phase shifts that occurred in the intellectual history of Western culture involved the ontological reduction of secondary qualities to primary qualities. To say the least, this reduction worked to undermine the foundations undergirding Aristotelian thought in support of a scientific view of the world based strictly on an examination of the real—primary— qualities of things. In this essay, I identify the so-called “Causal Argument” for a reductive view of secondary qualities and seek to (...) deflect this challenge by deriving some plausible consequences that support a non-reductive view of secondary qualities from an Aristotelian view (via the philosophical commentary of Thomas Aquinas). Specifically, my argument has two facets. First, I show that Aristotle’s view both implies recognition of the extramental existence of secondary qualities and is a prima facia natural view to take regarding the ontology of secondary qualities. Second, I show that the Causal Argument, which is thought to undermine a natural view of secondary qualities as real things, loses its bite when one examines perception in light the ontological relationship among the categories of quality, quantity and substance. (shrink)

Thanks to genetic and biochemical advances on the molecular mechanism of circadian rhythms in Drosophila, theoretical models closely related to experimental observations can be considered for the regulatory mechanism of the circadian clock in this organism. Modeling is based on the autoregulatory negative feedback exerted by a complex between PER and TIM proteins on the expression of per and tim genes. The model predicts the occurrence of sustained circadian oscillations in continuous darkness. When incorporating light‐induced TIM degradation, the model accounts (...) for damping of oscillations in constant light, entrainment of the rhythm by light‐dark cycles of varying period or photoperiod, and phase shifting by light pulses. The model further provides a molecular dynamical explanation for the permanent or transient suppression of circadian rhythmicity triggered in a variety of organisms by a critical pulse of light. Finally, the model shows that to produce a robust rhythm the various clock genes must be expressed at the appropriate levels since sustained oscillations only occur in a precise range of parameter values. BioEssays 22:84–93, 2000. ©2000 John Wiley & Sons, Inc. (shrink)

In cinematic experience, a view from nowhere appears in an instituting moment – neither in time nor out of time, but part of time itself – when a camera reflex lifts the viewer’s perception out of somewhere and into the infinite time of the film. We argue that the view from nowhere found in Birt Acres’s film Rough Sea at Dover – a fifteen-second shot of waves breaking against a sea wall in Dover, England in 1895 – transcends all attempts (...) to turn it into a view from somewhere, as an empty space that carries the auratic trace of the past into the present through phase shifts of technical mediation. In Simondon’s terms, the view from nowhere opens up possibilities of becoming all ways at once in the reflexive capacity of the human organon. Following Stiegler’s organological technics, we identify the capture of perception by the apparatus of recording and playback in the digitally automated algorithm as a threat to the reflexive capability of the organon to see otherwise in the creative individuation opened up in the phase-shifting process. Our analysis triggers a switch from an anthropocentric to a neganthropic-ecological mode of seeing in which the auratic trace of the event of waves crashing against the pier is seen in an inhuman view from nowhere that carries the threat of automatized systems in which human noesis – self-reflexive capacity – is eclipsed by machines. By seeing otherwise, the eclipse by machines is reversed to reveal the complex becoming of the film in its materiality as a work of creative individuation. (shrink)

For the purpose of contributing to a clarification of the term process, different kinds of musical processes are investigated: A rule-determined phase shifting process in Steve Reich's Piano Phase (1966), a model for an indeterminate composition process in John Cage's Variations II (1961), a number of evolution processes in György Ligeti's In zart fliessender Bewegung (1976), and a generative process of fractal nature in Per Nørgård's Second Symphony (1970). In conclusion I propose that six process categories should be (...) included in a typology of processes: Rule-determined, goal-directed and indeterminate transformation processes, and rule-determined, goal-directed and indeterminate generative processes. (shrink)