This article discusses passive and active aspects of consciousness as two equally justified roots of life experiencing the world. The passive domain involves the synthesis of internal time, association, habituality, bodily aspects, etc. The active domain includes strictly cognitive competences of consciousness: thinking, judging, etc. What has been actively constituted becomes passive as the basic level for higher form of understanding. The two domains interweave, influence each other, complement each other, and also remain in a certain tension (...) and discrepancy. In the broader perspective of the system of consciousness and its various layers, the passive-active differentiation must be treated functionally, and not as hierarchically arranged or constituted by separable concepts. It reflects the dynamics of the consciousness system at all its levels, and its meaning oscillates between the opposite and the overlapping. --------------------- Received: 26/01/2022. Reviewed: 28/03/2022. Accepted: 12/05/2022. (shrink)

The aim of this work is to study the effect of coupling on a metabolic pathway. Specifically we assume that metabolites can exchange matter with outside pools via passive diffusion. The existence of periodic solutions in such a system is considered and resolved using the dual input describing function method. In one particular case of coupling for all permissible parameter sets the minimum dimension is given so that it is possible to detect a periodic solution. The results obtained are (...) compared with previously derived results for systems without coupling. It is concluded that coupling with exterior pools of metabolites can give rise to steady state instead of periodic solution. (shrink)

The search for the best wellness practice has promoted the development of devices integrating different technologies and guided meditation. However, the final effects on the electrical activity of the brain remain relatively sparse. Here, we have analyzed of the alpha and theta electroencephalographic oscillations during the realization of the arrest reaction when a chromotherapy session performed in a dedicated room [Rebalance device], with an ergonomic bed integrating pulsed-wave light stimulation, guided breathing, and body scan exercises. We demonstrated that the PWL (...) induced an evoked-related potential characterized by the N2-P3 components maximally recorded on the fronto-central areas and accompanied by an event-related synchronization of the delta–theta–alpha oscillations. The power of the alpha and theta oscillations was analyzed during repeated ARs testing realized along with the whole RB session. We showed that the power of the alpha and theta oscillations was significantly increased during the session in comparison to their values recorded before. Of the 14 participants, 11 and 6 showed a significant power increase of the alpha and theta oscillations, respectively. These increased powers were not observed in two different control groups who stayed passively outside or inside the RB room but without any type of stimulation. These preliminary results suggest that PWL chromotherapy and guided relaxation induce measurable electrical brain changes that could be beneficial under neuropsychiatric perspectives. (shrink)

È possibile rendere compiutamente conto di ciò che gli artefatti e le tecnologie fanno, senza per questo sminuire il ruolo dell’agentività umana, ossia la capacità dell’essere umano di essere all’origine dell’azione e del senso?Per quanto determinismo tecnologico e sociocostruzionismo siano ormai approcci sufficientemente integrati, sembra quasi impossibile poter riconoscere l’uno senza pagare nulla di più che un piccolo contributo all’altro.Gli autori sottolineano quanto questa cesura che apparentemente riguarda un fenomeno circoscritto e settoriale come il ruolo degli artefatti nella costruzione del (...) mondo sociale, rispecchia in qualche modo l’antica distinzione proposta da Dilthey tra scienze della natura e scienze dello spirito. Il fatto é che tale divisione del lavoro scientifico sembra il risultato più che il punto di partenza di un lavoro deliberato di purificazione dei due domini . Per quanto utile da un punto di vista epistemologico, essa corre costantemente il rischio di proclamare a priori l’incapacità di alcune metodologie di indagare oggetti che si situerebbero al di là della loro giurisdizione . Inoltre, gli autori ritengono che questa distinzione sia alquanto problematica quando si tratta di questioni ontologiche. In linea con il pensiero di filosofi come Whithead , Delueze e Guatatri e Tarde , sostengono che tanto l’approccio sociocostruzionista quanto l’approccio tecno-determinista soffrano di un simile riduzionismo ontologico: ridurre l’oggetto di indagine a quanto la prospettiva inscritta in ciascuna metodologia consente di vedere e di analizzare.Prendendo le distanze da tale riduzionismo, questo articolo intende dimostrare che la materialità, la tecnologia e persino la natura intrudono costantemente nel mondo del significato, della comunicazione, del discorso. Allo stesso tempo, cultura e significato conferiscono senso e persino forma al mondo naturale . A fronte della propensione diffusa a pensare l’interazione come qualcosa che riguarda soltanto gli essere umani, gli autori mostrano che altre cose si autoconvocano costantemente nelle nostre conversazioni e che é legittimo ipotizzare che tali cose facciano «cose con le parole», per usare la famosa espressione che John Langshaw Austin coniò per indicare ciò che le persone fanno attraverso i loro atti linguistici.Attraverso un esempio tratto dalle osservazioni sul campo in un presidio medico d’urgenza operato da Medici senza Frontiere, gli autori mostrano che il sottolineare quanto e come le cose siano partecipanti attivi in una conversazione non significa evacuare il contributo umano all’attività di parola. Se le cose fanno cose con le parole é perché portano prospettivamente le persone a dire quel che dicono e, retrospettivamente, a far dire loro quel che hanno detto. Piuttosto che postulare che i soli partecipanti umani siano all’origine di quanto vien detto durante una conversazione, diventa possibile ritracciare altre origini o elementi che influenzano e condizionano ciò che le persone fanno mentre parlano tra loro.Il fatto che gli oggetti siano spesso trasformati dalla loro stessa incursione sulla scena interattiva viene vista come una prova della « realtà » del loro contributo alla conversazione. Utilizzando la metafora del ventriloquismo, gli autori mostrano che se i partecipanti umani fanno sì che le cose facciano cose con le parole, ciò é anche dovuto al fatto che le cose stesse fanno far loro cose con le parole, in quella sorta di oscillazione ventriloqua già sottolineata da David Goldbaltt . Individuare le tracce sia dell’agentività umana sia dell’agentività tecnologica, porta a riconoscere il grado di passività o passione inerente a qualunque attività o azione. Tale riconoscimento é cruciale dal momento che tale passività fa parte dei modi con cui le persone rendono razionale/giustificabile/legittimabile/ sanzionabile ciò che esse fanno e dicono nel corso di una interazione.Invece di ridurre l’interazione ad un fenomeno che riguarda esseri umani tra loro, appare più costruttivo riconoscere tutte le figure che popolano la scena interattiva, siano esse tecnologie, regolamenti, principi, emozioni o artefatti. La proposta avanzata dagli autori può dunque essere vista come un tentativo di riabilitare metaforicamente l’analisi del parlare prendendo seriamente in considerazione ciò che le figure letteralmente hanno da dire su come noi, gli umani, comunichiamo e lavoriamo.Se poiesis significa fabbricazione, allora forse poesia può diventare un modo innovativo di comprendere come funzionano le tecnologie e come noi interagiamo con esse.While we tend to think of interaction as involving human beings only, this paper proposes to show that other things – technologies, in particular – are continuously inviting themselves in our conversations and that these things can even be said to “do things with words.” Using the metaphor of ventriloquism, we show that if human participants make things do things with words, it is also because things animate them, a form of ventriloqual vacillation or oscillation already noticed by David Goldblatt . Acknowledging both human and technological agencies therefore leads us to recognize the degree of passivity or passion that is inherent in any activity or action, a recognition that is especially important given that its marks the accountable / reasonable / intelligible / justifiable / sanctionable character of what people do and say in interaction. (shrink)

Daily rhythms are a ubiquitous feature of living systems. Generally, these rhythms are not just passive consequences of cyclic fluctuations in the environment, but instead originate within the organism. In mammals, including humans, the master pacemaker controlling 24‐hour rhythms is localized in the suprachiasmatic nuclei of the hypothalamus. This circadian clock is responsible for the temporal organization of a wide variety of functions, ranging from sleep and food intake, to physiological measures such as body temperature, heart rate and hormone (...) release. The retinal circadian clock was the first extra‐SCN circadian oscillator to be discovered in mammals and several studies have now demonstrated that many of the physiological, cellular and molecular rhythms that are present within the retina are under the control of a retinal circadian clock, or more likely a network of hierarchically organized circadian clocks that are present within this tissue. BioEssays 30:624–633, 2008. © 2008 Wiley Periodicals, Inc. (shrink)

La plupart des projets d’architectures cognitives dans les sciences cognitives et des explications des processus cérébraux dans les neurosciences interprètent l’esprit/cerveau comme réactif : le processus est déclenché par un stimulus et se termine par une réponse. Mais il y a de plus en plus de données laissant penser que le cerveau est endogéniquement actif : des oscillations de l’activité électrochimique à de multiples fréquences ont lieu dans le cerveau même en l’absence de stimuli et ceux-ci servent plutôt à moduler (...) ces oscillations qu’à déclencher l’activité. De plus, des données montrent que cette activité endogène est utilisée dans diverses activités de traitement de l’information. Je m’appuie sur les données issues des enregistrements cellulaires unitaires, de l’EEG et de l’IRMf en situation passive, afin de soutenir la thèse d’un comportement oscillatoire continu dans le cerveau et d’identifier plusieurs manières dont ce comportement peut contribuer à la cognition. Si les sciences cognitives ont pour but de comprendre comment nous effectuons des tâches cognitives, elles ont besoin de développer des architectures cognitives qui intègrent le type d’activité endogène dynamique présentée par le cerveau. (shrink)

The scope of the thermodynamic theory of nonlinear irreversible processes is widened to include the nonlinear stability analysis of system motion. The emphasis is shifted from the analysis of instantaneous energy flows to that of the average work performed by periodic nonlinear processes. The principle of virtual work separates dissipative and conservative forces. The vanishing of the work of conservative forces determines the natural period of oscillation. Stability is then determined by the variations of the dissipative forces with amplitude (...) of oscillation. If the work is a minimum, under certain conditions, the motion is stable. Reduction to linear analysis shows the coincidence with the impedance analysis of electrical circuit theory. The theory is applied to the analysis of temporal interactions of nonlinear irreversible processes in the particular cases of synchronization and hysteresis. Characteristic nonequilibrium phenomena of directional energy transfers, self-excitation, system passivity, wave modulation, and “beat” phenomena are observed. Possible relationships with biological processes are discussed. (shrink)

Misunderstanding of the dynamical behavior of the ventilatory system, especially under assisted ventilation, may explain the problems encountered in ventilatory support monitoring. Proportional assist ventilation (PAV) that theoretically gives a breath by breath assistance presents instability with high levels of assistance. We have constructed a mathematical model of interactions between three objects: the central respiratory pattern generator modelled by a modified Van der Pol oscillator, the mechanical respiratory system which is the passive part of the system and a controlled (...) ventilator that follows its own law. The dynamical study of our model shows the existence of two crucial behaviors, i.e. oscillations and damping, depending on only two parameters, namely the time constant of the mechanical respiratory system and a cumulative interaction index. The same result is observed in simulations of spontaneous breathing as well as of PAV. In this last case, increasing assistance leads first to an increase of the tidal volume (VT), a further increase in assistance inducing a decrease in VT, ending in damping of the whole system to an attractive fixed point. We conclude that instabilities observed in PAV may be explained by the different possible dynamical behaviors of the system rather than changes in mechanical characteristics of the respiratory system. (shrink)

The separation thesis states that business and moral decision making should and can be differentiated clearly. This study provides empirical support for the competing view that the separation thesis is impossible through a case study of the Rotary Club, which fosters an ethical orientation among its global business and professional membership. The study focuses attention on the Club in the early to middle 20th century. Based on a reading of their service doctrine, the four objects of Rotary and (...) the Four Way Test, the author argues that the example of the Rotary Club undermines the separation thesis. The Rotary message was conceptually ambiguous: it did not clearly differentiate business roles from social activities; rather both fed into each other, with the business tools developed by members and disseminated by Rotary, utilized in nonbusiness contexts with a view to enhancing societal well-being. (shrink)

The occurrence of oscillatory behaviours in living cells can be viewed as a visible consequence of stable, regulatory homeostatic cycles. Therefore, they may be used as experimental windows on the underlying physiological mechanisms. Recent studies show that growing pollen tubes are an excellent biological model for these purposes. They unite experimental simplicity with clear oscillatory patterns of both structural and temporal features, most being measurable during real‐time in live cells. There is evidence that these cellular oscillators involve an integrated input (...) of plasma membrane ion fluxes, and a cytosolic choreography of protons, calcium and, most likely, potassium and chloride. In turn, these can create positive feedback regulation loops that are able to generate and self‐sustain a number of spatial and temporal patterns. Other features, including cell wall assembly and rheology, turgor, and the cytoskeleton, play important roles and are targets or modulators of ion dynamics. Many of these features have similarities with other cell types, notably with apical‐growing cells. Pollen tubes may thus serve as a powerful model for exploring the basis of cell growth and morphogenesis. BioEssays 23:86–94, 2001. © 2001 John Wiley & Sons, Inc. (shrink)

Passive Cooling addresses all of the existing creative energyless means of keeping buildings cool. Unlike passive heating, which draws on the sun, passive cooling relies on three natural heat sinks - the sky, the atmosphere, and the earth to achieve temperature moderation. This book describes and evaluates mechanisms for coupling buildings to these sinks and ways of integrating multiple strategies into effective passive cooling systems.In "Radiative Cooling," Marlo Martin explains how the sky specifically outer space - (...) acts as the ultimate absorber to balance energy inputs from the sun as well as other sources. "Ventilative Cooling" by Subrato Chandra and "Evaporative Cooling" by John Yellott describe two ways in which the atmosphere can serve as a medium of heat transfer. The third natural heat sink the earth, is evaluated by Kenneth Labs in "Earth Coupling." Gene Clark in "Passive Cooling Systems" explains how each of these cooling resources affects the design of a building in a dramatically different way and shows how they can be combined. And Jeffrey Cook reviews the current state of basic and applied research projects and anticipates promising future directions of study and application.Because passive cooling techniques have a rich and diverse history of worldwide development and application, the editor has taken special care to relate developments in the United States to international practice and research, providing a broad base for professional redirection in building design.Jeffrey Cook is Regents Professor of Architecture at Arizona State University. Passive Cooling is volume 8 in the series Solar Heat Technologies: Fundamentals and Applications, edited by Charles A Bankston. (shrink)

Synchronizing oscillations may be just one case of integration and/or coding, one which explains associations by concurrence. Understanding the sequencing of neural/behavioral events requires a clock mechanism that imposes structure behind mere associations, and may be best served by dissociating oscillations and synchronization in terms of physiologic and computational mechanisms.

Is it always better to be active than passive? Is passivity a sign of cowardice - or prudence? Are people who keep their thoughts to themselves passive, or might they be actively preparing for well-considered future actions? Seemingly simple concepts turn out to be deeper and more significant than they first appear.

Working memory is a limited capacity memory system that involves the short-term storage and processing of information. Neuroscientific studies of working memory have mostly focused on the essential roles of neural oscillations during item encoding from single sensory modalities (e.g., visual and auditory). However, the characteristics of neural oscillations during multisensory encoding in working memory are rarely studied. Our study investigated the oscillation characteristics of neural signals in scalp electrodes and mapped functional brain connectivity while participants encoded complex audiovisual (...) objects in a working memory task. Experimental results showed that theta oscillations (4–8 Hz) were prominent and topographically distributed across multiple cortical regions, including prefrontal (e.g., superior frontal gyrus), parietal (e.g., precuneus), temporal (e.g., inferior temporal gyrus), and occipital (e.g., cuneus) cortices. Furthermore, neural connectivity at the theta oscillation frequency was significant in these cortical regions during audiovisual object encoding compared with single modality object encoding. These results suggest that local oscillations and interregional connectivityviatheta activity play an important role during audiovisual object encoding and may contribute to the formation of working memory traces from multisensory items. (shrink)

The complex bursting oscillation and bifurcation mechanisms in coupling systems of different scales have been a hot spot domestically and overseas. In this paper, we analyze the bursting oscillation of a generalized Duffing–Van der Pol system with periodic excitation. Regarding this periodic excitation as a slow-varying parameter, the system can possess two time scales and the equilibrium curves and bifurcation analysis of the fast subsystem with slow-varying parameters are given. Through numerical simulations, we obtain four kinds of typical (...) bursting oscillations, namely, symmetric fold/fold bursting, symmetric fold/supHopf bursting, symmetric subHopf/fold cycle bursting, and symmetric subHopf/subHopf bursting. It is found that these four kinds of bursting oscillations are symmetric. Combining the transformed phase portrait with bifurcation analysis, we can observe bursting oscillations obviously and further reveal bifurcation mechanisms of these four kinds of bursting oscillations. (shrink)

A reply to the call to rethink the material constraints on materialism itself, this book uses oscillation to refer simultaneously to movement within and between bodies of theory, within theories of the body, and within and between ...

Prior reports suggest that affective effects in visual word processing cannot be fully explained by a dimensional perspective of emotions based on valence and arousal. In the current study, we focused on the contribution of approach and avoidance motivational systems that are related to different action components to the processing of emotional words. To this aim, we compared frontal alpha asymmetries and brain oscillations elicited by anger words associated with approach (fighting) motivational tendencies, and fear words that may trigger either (...) avoidance (escaping), approach (fighting) or no (freezing) action tendencies. The participants’ task was to make decisions about approaching or distancing from the concepts represented by words. The results of cluster-based and beamforming analyses revealed increased gamma power band synchronization for fear words relative to anger words between 725 and 750 ms, with an estimated neural origin in the temporal pole. These findings were interpreted to reflect a conflict between different action tendencies underlying the representation of fear words in semantic and emotional memories, when trying to achieve task requirements. These results are in line with the predictions made by thefear-hinders-actionhypothesis. Additionally, current data highlights the contribution of motivational features to the representation and processing of emotional words. (shrink)

An alternative neutrino oscillation process is presented as a counterexample for which the neutrino may have nil mass consistent with the standard model. The process is developed in a quantum trajectories representation of quantum mechanics, which has a Hamilton–Jacobi foundation. This process has no need for mass differences between mass eigenstates. Flavor oscillations and \ oscillations are examined.

We explore the contribution made by oscillatory, synchronous neural activity to representation in the brain. We closely examine six prominent examples of brain function in which neural oscillations play a central role, and identify two levels of involvement that these oscillations take in the emergence of representations: enabling (when oscillations help to establish a communication channel between sender and receiver, or are causally involved in triggering a representation) and properly representational (when oscillations are a constitutive part of the representation). We (...) show that even an idealized informational sender–receiver account of representation makes the representational status of oscillations a non-trivial matter, which depends on rather minute empirical details. (shrink)

To explain the phenomenon that certain English verbs resist passivization, Pinker proposed a semantic constraint on the passive in the adult grammar: The greater the extent to which a verb denotes an action where a patient is affected or acted upon, the greater the extent to which it is compatible with the passive. However, a number of comprehension and production priming studies have cast doubt upon this claim, finding no difference between highly affecting agent-patient/theme-experiencer passives and non-actional experiencer (...) theme passives. The present study provides evidence that a semantic constraint is psychologically real, and is readily observed when more fine-grained independent and dependent measures are used. We conclude that a semantic constraint on the passive must be incorporated into accounts of the adult grammar. (shrink)

This study investigates the ability of individuals with psychopathy to perform passive avoidance learning and whether this ability is modulated by level of reinforcement/punishment. Nineteen psychopathic and 21 comparison individuals, as defined by the Hare Psychopathy Checklist Revised (Hare, 1991), were given a passive avoidance task with a graded reinforcement schedule. Response to each rewarding number gained a point reward specific to that number (i.e., 1, 700, 1400 or 2000 points). Response to each punishing number lost a point (...) punishment specific to that number (i.e., the loss of 1, 700, 1400 or 2000 points). In line with predictions, individuals with psychopathy made more passive avoidance errors than the comparison individuals. In addition, while the performance of both groups was modulated by level of reward, only the performance of the comparison population was modulated by level of punishment. The results are interpreted with reference to a computational account of the emotional learning impairment in individuals with psychopathy. (shrink)

High-frequency oscillations (HFO) are a promising biomarker for the identification of epileptogenic tissue. While HFO rates have been shown to predict seizure outcome, it is not yet clear whether their morphological features might improve this prediction. We validated HFO rates against seizure outcome and delineated the distribution of HFO morphological features. We collected stereo-EEG recordings from 20 patients (231 electrodes; 1,943 contacts). We computed HFO rates (the co-occurrence of ripples and fast ripples) through a validated automated detector during non-rapid eye (...) movement sleep. Applying machine learning, we delineated HFO morphological features within and outside epileptogenic tissue across mesial temporal lobe (MTL) and Neocortex. HFO rates predicted seizure outcome with 85% accuracy, 79% specificity, 100% sensitivity, 100% negative predictive value, and 67% positive predictive value. The analysis of HFO features showed larger amplitude in the epileptogenic tissue, similar morphology for epileptogenic HFO in MTL and Neocortex, and larger amplitude for physiological HFO in MTL. We confirmed HFO rates as a reliable biomarker for epilepsy surgery and characterized the potential clinical relevance of HFO morphological features. Our results support the prospective use of HFO in epilepsy surgery and contribute to the anatomical mapping of HFO morphology. (shrink)

In this chapter we shall examine the characteristic properties of a construction wide-spread in the world’s languages, the passive. In section 1 below we discuss defining characteristics of passives, contrasting them with other foregrounding and backgrounding constructions. In section 2 we present the common syntactic and semantic properties of the most wide-spread types of passives, and in section 3 we consider passives which differ in one or more ways from these. In section 4, we survey a variety of constructions (...) that resemble passive constructions in one way or another. In section 5, we briefly consider differences between languages with regard to the roles passives play in their grammars. Specifically, we show that passives are a more essential part of the grammars of some languages than of others. (shrink)

I look at the ‘flavour-oscillation clocks’ proposed by D. V. Ahluwalia and two of his arguments suggesting that such clocks might behave in a way that threatens the geometricity of general relativity (GR). The first argument states that the behaviour of these clocks in the vicinity of a rotating gravitational source implies a non-geometrical element of gravity. I argue that the phenomenon is best seen as an instance of violation of the ‘clock hypothesis’ and therefore does not threaten the (...) geometrical nature of gravitation. Ahluwalia’s second argument, for the ‘incompleteness’ of general relativity, involves the idea that flavour-oscillation clocks can detect constant gravitational potentials. I argue that the purported ‘incompleteness-establishing’ result is in fact one that applies to all clocks. It is entirely derivable from general relativity, does not result in the observability of the potential, and is not at odds with any of general relativity’s foundations. (shrink)

This paper argues that the Husserlian notion of “passive synthesis” can make a substantial contribution to the understanding of aesthetic experience. The argument is based on two empirical cases of qualitative interview material obtained from museum visitors and a world-renowned string quartet, which show that aesthetic experience contains an irreducible dimension of passive undergoing and surprise. Analyzing this material through the lens of passive syntheses helps explain these experiences, as well as the sense of subject–object fusion that (...) occurs in some of the most intense forms of aesthetic experience. These analyses are then contrasted with a potentially contradicting take on aesthetic experience from a recent trend in cognitive science, namely enactive aesthetics, which insists on the active subjective construction and sense-making of aesthetic experience. Finally we show that the two positions are in fact compatible. (shrink)

This essay looks at Fassbinder's Berlin Alexanderplatz to trace the film's transformation of a mechanistic scientific discourse into affective indeterminacy. Through patterns of repetition of a key event, the film considers its protagonist as a complex web of constantly shifting forces – a network of biological, social, political and semiotic flows coalescing in a body that exists in a state of perpetual oscillation between force and mutilation, ecstasy and pain. The role of physics and other materialist discourses in the (...) film is thus not to fixate subjectivity, but rather to provide a passage into its affective transformations and the intense desubjectification that results. (shrink)

Examines the notion of passivity in the work of Levinas, Blanchot, and Agamben.

Gramsci’s concept of hegemony has been interpreted in a wide variety of ways, including a theory of consent, of political unity, of ‘anti-politics’, and of geopolitical competition. These interpretations are united in regarding hegemony as a general theory of political power and domination, and as deriving from a particular interpretation of the concept of passive revolution. Building upon the recent intense season of philological research on the Prison Notebooks, this article argues that the concept of hegemony is better understood (...) as a ‘dialectical chain’ composed of four integrally related ‘moments’: hegemony as social and political leadership, as a political project, as a hegemonic apparatus, and as the social and political hegemony of the workers’ movement. This alternative typology of hegemony provides both a sophisticated analysis of the emergence of modern state power and a theory of political organization of the subaltern social groups. This project is encapsulated in Gramsci’s notion of the formation of a ‘modern Prince’, conceived as both political party and civilizational process, which represents an emancipatory alternative to the dominant forms of political modernity. (shrink)

Zusammenfassung. In der Auseinandersetzung um die Frage, ob aktive Sterbehilfe mit dem ärztlichen Ethos vereinbar ist, werden häufig deskriptive Unterscheidungen wie Tun vs. Unterlassen, aktiv vs. passiv oder auch intendieren vs. in Kauf nehmen benutzt, um eine kategorische moralische Differenz zwischen Töten und Sterbenlassen auszuweisen. Als zusätzliche Schwierigkeit erweist sich dabei zum einen, daß zentrale Begriffe zwischen einer deskriptiven und einer ethischen Bedeutung changieren, und zum anderen, daß die Kennzeichnung des Problems (z.B. Sterbehilfe) selbst ethisch nicht neutral ist. Nach der (...) Entwicklung einer ethisch neutralen Problemstellung werden kategorische Argumente gegen die ethische Zulässigkeit aktiver Sterbehilfe diskutiert und verworfen. Anschließend werden Begründungen diskutiert, die mittels intrinsischer oder extrinsischer Situationsmerkmale eine ethische Unzulässigkeit aktiver Sterbehilfe aufzuweisen versuchen. Dabei zeigt sich, daß graduelle ethische Unterschiede zwischen passiver, indirekt und direkt aktiver Sterbehilfe begründbar sind, die ein jeweils höheres Maß an Rechtfertigungsgründen erfordern. (shrink)