This is an expansion of the author's 1991 work which investigates the implications of Gödel's writings on Einstein's theory of relativity as they relate to the fundamental questions of the nature of time and the possibilities for time travel.

As a special type of lithologic body, gas-bearing strata, composed of rhyolite, an igneous rock with a volcanic composition, are characterized by deep burial, complex lithology, poor stratification, and a complicated gas-bearing distribution. These characteristics lead to difficulties in the prediction of gas-bearing reservoir parameters and thus restrict the exploration and exploitation of such reservoirs. The unique and complex volcanic model contains different types of facies and subfacies because the volcanic eruption usually experiences different explosion-effusion periods. Our study focuses on (...) the vertical and lateral gas-bearing reservoir distribution in a volcanic environment in the Cretaceous Yingcheng Formation of the Songnan Gas Field, using seismic facies-controlled nonlinear stochastic inversion to integrate the volcanic facies information. First, we built the volcanic facies model for the Songliao Basin to introduce the comprehensive characteristics of the volcanic facies during a volcanic eruption and analyzed the well-tie logging facies and seismic facies to guide the facies analysis of the target layer. Then, based on this facies analysis, we depicted the gas-bearing reservoir in detail through the use of seismic facies-controlled nonlinear random inversion. Finally, we predicted the distribution of the gas-bearing reservoir by the inversion results. The predicted results were found to agree well with the actual drilling data. The inversion method effectively predicts the velocity distribution of the gas-bearing reservoir, which provides a good foundation for the subsequent description of gas-bearing reservoirs in the Yingcheng Formation. (shrink)

This essay examines the risks of racialized science as revealed in the American mustard gas experiments of World War II. In a climate of contested beliefs over the existence and meanings of racial differences, medical researchers examined the bodies of Japanese American, African American, and Puerto Rican soldiers for evidence of how they differed from whites.

In this article I scrutinise a crucial tension in understanding the debate over shale gas production in Europe. On the one hand, analyses predominantly grasp the debate in terms of pro-and-con dialectics, as if the pro-shale gas camp faced the anti-shale gas camp in a dyadic clash of opposing voices. On the other hand, it is commonly recognised that this debate is driven by multi-party and multi-position argumentative dynamics. In this broader context, I focus on one pivotal contribution to the (...) debate – Gazprom’s press release from October 2013 outlining Russia’s energy giant’s strategy of dealing with unconventional gas production. I employ concepts and methods of argumentative discourse analysis to contend that an arguer to a multi-party debate – argumentative polylogue – faces a number of constraints and opportunities that cannot be adequately grasped in terms of dyadic pro-and-con dialectics. The analysis reveals how Gazprom needs to simultaneously design its discourse to address a number of other parties who might also disagree among themselves: from Greenpeace to European Union governments to shale gas companies. I show why and how a stakeholder analysis used in organisational communication might lead to a better understanding of this form of multi-party public argumentation. (shrink)

The thesis of this paper is that individual emitters, in contrast to governments, may be justified in employing excusable ignorance as an excuse after 1990 and even well into the future. Although it may at first seem counterintuitive, this is not only true of individuals with extremely limited access to information but potentially also of highly educated individuals with almost boundless access to data, reports, and analyses. I develop the argument based on an influential account of excusable ignorance and discuss (...) and reject an objection from expert testimony. (shrink)

What are the common denominators for success when we consider increasing gas efficiency and enhancing creativity in organizations? As an analogy, the principles of increasing gas efficiency are applicable to enhancing creativity in organizations: Plan activities in advance, allocate sufficient time, resources, and set a SMART goal with clear priority and focus. Identify talent in ourselves and others and do not fall into the temptation of following others. Big ideas take time. Maintain momentum, avoid interruptions, incorporate new technologies, information, and (...) feedback, and modify action to achieve goals. We have 100% control of our thoughts and action. Stop idling, take action, and do it now. If everyone contributes just a little, the cumulative effect over time can be huge. If we have the knowledge, skills, and abilities (KSA) for doing the right things that will benefit humanity and the whole world, but fail to do them, is this ethical? We, the managers, need to focus on what we have done and what we have failed to do, change our thinking, change our behavior, and accomplish our goals. (shrink)

In the Abu Madi Formation of the Nile Delta Basin, false bright spots may be misinterpreted as being indicative of hydrocarbons due to mixed clastics and carbonates. However, rock-physics analysis of well logs in a particular prospect area where such ambiguity exists suggests that attributes derived using extended elastic impedance inversion may help identify hydrocarbons because they better show anomalous behavior in particular directions that are readily related to pore fluids and lithology. The EEI attributes calculated from well logs correlate (...) extremely well to lithology and fluid properties, thereby differentiating amplitude anomalies caused by gas-bearing sandstones encased in shale from similar amplitudes caused by juxtaposition of high-impedance carbonates over lower impedance water-filled sandstones. Comparing seismically derived EEI attributes to well logs from a productive well and a nonproductive well indicates that seismic inversion can successfully identify lithologies such as shales, sandstones, carbonates, and anhydrite and distinguish gas-bearing from water-bearing sandstones. The technique can thus potentially be used to better delineate and risk prospects in the area, as well as assisting exploration efforts in other locations where similar ambiguities in amplitude interpretation exist. (shrink)

In this paper two models for movement of respiratory gases in the insect trachea are presented. One model considers the tracheal system as a single flexible compartment while the other model considers the trachea as a single flexible compartment with gas exchange. This work represents an extension of Ben-Tal’s work on compartmental gas exchange in human lungs and is applied to the insect tracheal system. The purpose of the work is to study nonlinear phenomena seen in the insect respiratory system. (...) It is assumed that the flow inside the trachea is laminar, and that the air inside the chamber behaves as an ideal gas. Further, with the isothermal assumption, the expressions for the tracheal partial pressures of oxygen and carbon dioxide, rate of volume change, and the rates of change of oxygen concentration and carbon dioxide concentration are derived. The effects of some flow parameters such as diffusion capacities, reaction rates and air concentrations on net flow are studied. Numerical simulations of the tracheal flow characteristics are performed. The models developed provide a mathematical framework to further investigate gas exchange in insects. (shrink)

It is a widely known but little considered fact that Albert Einstein and Kurt Gödel were best friends for the last decade and a half of Einstein's life. The two walked home together from Princeton's Institute for Advanced Study every day; they shared ideas about physics, philosophy, politics, and the lost world of German science in which they had grown up. By 1949, Gödel had produced a remarkable proof: In any universe described by the Theory of Relativity, time cannot exist (...) . Einstein endorsed this result-reluctantly, since it decisively overthrew the classical world-view to which he was committed. But he could find no way to refute it, and in the half-century since then, neither has anyone else. Even more remarkable than this stunning discovery, however, was what happened afterward: nothing. Cosmologists and philosophers alike have proceeded with their work as if Gödel's proof never existed -one of the greatest scandals of modern intellectual history. A World Without Time is a sweeping, ambitious book, and yet poignant and intimate. It tells the story of two magnificent minds put on the shelf by the scientific fashions of their day, and attempts to rescue from undeserved obscurity the brilliant work they did together. (shrink)

We model a piece of text of human language telling a story by means of the quantum structure describing a Bose gas in a state close to a Bose–Einstein condensate near absolute zero temperature. For this we introduce energy levels for the words used in the story and we also introduce the new notion of ‘cogniton’ as the quantum of human thought. Words are then cognitons in different energy states as it is the case for photons in different energy states, (...) or states of different radiative frequency, when the considered boson gas is that of the quanta of the electromagnetic field. We show that Bose–Einstein statistics delivers a very good model for these pieces of texts telling stories, both for short stories and for long stories of the size of novels. We analyze an unexpected connection with Zipf’s law in human language, the Zipf ranking relating to the energy levels of the words, and the Bose–Einstein graph coinciding with the Zipf graph. We investigate the issue of ‘identity and indistinguishability’ from this new perspective and conjecture that the way one can easily understand how two of ‘the same concepts’ are ‘absolutely identical and indistinguishable’ in human language is also the way in which quantum particles are absolutely identical and indistinguishable in physical reality, providing in this way new evidence for our conceptuality interpretation of quantum theory. (shrink)

Lattice-gas cellular automaton (LGCA) and lattice Boltzmann (LB) models are promising models for studying emergent behaviour of transport and interaction processes in biological systems. In this chapter, we will emphasise the use of LGCA/LB models and the derivation and analysis of LGCA models ranging from the classical example dynamics of fluid flow to clotting phenomena in cerebral aneurysms and the invasion of tumour cells.

Pore- and fracture-filling gas hydrates were identified from the core samples at several sites during the second Guangzhou Marine Geological Survey expedition. Well logs indicated that gas hydrate occurred in three distinct layers at site GMGS2-08. The gas hydrate saturations calculated from well-log data and the seismic responses for the three gas hydrate-bearing layers, especially within the middle carbonate layer, were poorly known. We estimated gas hydrate saturations using isotropic and anisotropic models based on the mineral composition of the sediments (...) and the effective medium theory. In the upper and lower gas hydrate-bearing layers, saturations estimated from anisotropic models are close to those estimated from pressures cores and chlorinity data. The average saturation using an anisotropic model in the upper hydrate layer is approximately 10% with a maximum value of 25%. In the lower layer, the horizontal and vertical gas hydrate-filled fractures and visible gas hydrate were formed with a maximum saturation of approximately 85%. For the middle layer, well logs show high P-wave velocity, density, high resistivity as well as low gamma ray, porosity, and drilling rate, together indicating a carbonate layer containing gas hydrate. The hydrate saturations calculated from isotropic models assuming hydrate formed at grain contacts are less than 20%, which fit well with two values calculated from chlorinity data for this layer. The upper gas hydrate layer shows no clear seismic response and probably consisted of small fractures filled with gas hydrate. The middle carbonate and lower fracture-filled gas hydrate-bearing layers show pull-up reflections, with the carbonate layer exhibiting relatively higher amplitudes. Pore-filling gas hydrate was also identified just above the depth of the bottom-simulating-reflector from the GMGS2-05 drill site. Below the BSR, the push-down reflections, polarity reversal, and enhanced reflections indicate the occurrence of free gas in the study area. (shrink)

As global warming continues to attract growing levels of attention, various stakeholders have put climate change on corporate agendas and expect firms to disclose relevant greenhouse gas information. In this paper, we investigate the consistency of the GHG information voluntarily disclosed by French listed firms through two different communication channels: corporate reports and the Carbon Disclosure Project. More precisely, we contrast the amounts of GHG emissions reported and the methodological explanations provided in each channel. Consistent with a stakeholder theory perspective, (...) we find that GHG amounts are significantly lower in the CR than in the CDP. We also find that firms increase the CR figures’ traceability when there is a discrepancy between disclosures in the two channels. We suggest that the aim of this greater traceability is to enhance information credibility across the different channels used. (shrink)

We have estimated the seismic attenuation in gas hydrate and free-gas-bearing sediments from high-resolution P-cable 3D seismic data from the Vestnesa Ridge on the Arctic continental margin of Svalbard. P-cable data have a broad bandwidth, which is extremely advantageous in estimating seismic attenuation in a medium. The seismic quality factor, the inverse of seismic attenuation, is estimated from the seismic data set using the centroid frequency shift and spectral ratio methods. The centroid frequency shift method establishes a relationship between the (...) change in the centroid frequency of an amplitude spectrum and the Q value of a medium. The SR method estimates the Q value of a medium by studying the differential decay of different frequencies. The broad bandwidth and short offset characteristics of the P-cable data set are useful to continuously map the Q for different layers throughout the 3D seismic volume. The centroid frequency shift method is found to be relatively more stable than the SR method. Q values estimated using these two methods are in concordance with each other. The Q data document attenuation anomalies in the layers in the gas hydrate stability zone above the bottom-simulating reflection and in the free gas zone below. Changes in the attenuation anomalies correlate with small-scale fault systems in the Vestnesa Ridge suggesting a strong structural control on the distribution of free gas and gas hydrates in the region. We argued that high and spatially limited Q anomalies in the layer above the BSR indicate the presence of gas hydrates in marine sediments in this setting. Hence, our workflow to analyze Q using high-resolution P-cable 3D seismic data with a large bandwidth could be a potential technique to detect and directly map the distribution of gas hydrates in marine sediments. (shrink)

Because shale gas content plays a very important role in the evaluation of gas shale potential, its calculation and prediction become obligatory. We used two predictive models, namely, the Langmuir and Ambrose models, to calculate the shale gas content. The parameters involved in these two models are calculated by various experiments and analytic methods, including indirect prediction, the isothermal adsorption test, X-ray diffraction analysis, total organic carbon measurement, pyrolysis, and porosity measurement. Then, a new calculation model that is applicable to (...) shales in the Kuqa Depression, Tarim Basin, is established. Further research on influential factors of gas content in well YN2 is implemented. The result indicates that the gas content of terrestrial shales is more influenced by TOC abundance than by the content of clay minerals and quartz. The main parameters in the new calculation model are the TOC, depth, porosity, and gas saturation. The Jurassic shale gas in well YN2 is speculated to be mainly adsorption gas, with a dominant proportion of 75%–90% in the total gas content. As the formation depth increases, the free-gas content rises continuously, whereas the adsorption gas content first increases and then approaches the equilibrium value or even tends to decrease slightly. Based on the foregoing results, the target layer, the Yengisar Formation, is predicted to possess an enormous amount of shale gas potential, with an average total gas content of [Formula: see text]. (shrink)

We model a piece of text of human language telling a story by means of the quantum structure describing a Bose gas in a state close to a Bose–Einstein condensate near absolute zero temperature. For this we introduce energy levels for the words used in the story and we also introduce the new notion of ‘cogniton’ as the quantum of human thought. Words are then cognitons in different energy states as it is the case for photons in different energy states, (...) or states of different radiative frequency, when the considered boson gas is that of the quanta of the electromagnetic field. We show that Bose–Einstein statistics delivers a very good model for these pieces of texts telling stories, both for short stories and for long stories of the size of novels. We analyze an unexpected connection with Zipf’s law in human language, the Zipf ranking relating to the energy levels of the words, and the Bose–Einstein graph coinciding with the Zipf graph. We investigate the issue of ‘identity and indistinguishability’ from this new perspective and conjecture that the way one can easily understand how two of ‘the same concepts’ are ‘absolutely identical and indistinguishable’ in human language is also the way in which quantum particles are absolutely identical and indistinguishable in physical reality, providing in this way new evidence for our conceptuality interpretation of quantum theory. (shrink)

Le large sujet annoncé par le titre de ce livre laisse entendre, pour qui fréquente un peu la philosophie médiévale, que nous allons être informés des vues les plus récentes sur ce problème que posent les textes philosophiques médiévaux, dont on ne dispose souvent pas d’éditions scientifiques, dont l’édition scientifique ellemême pose problème, textes qui appartiennent à une épistèmè si radicalement différente de la nôtre qu’il est légitime de penser que toute interprétation contemporaine va irrémédiablement en escamoter un caractère essentiel. (...) Ce qui pose, on le devine, le problème de la possibilité de la traduction. Éditer, c’est déjà interpréter. Traduire aussi. N’en déplaise aux éditeurs, l’interprétation est toujours première. Interpréter, éditer, traduire, d’Étienne Gilson à Lambert-Marie de Rijk, de Lambert-Marie De Rijk à Alain de Libera et Claude Panaccio ces questions sont au cœur de l’activité de l’historien de la philosophie médiévale. Cette problématique essentielle n’est, nous le concédons, pas absente de l’ouvrage. J. Brams, C. Burnett, et dans une moindre mesure J. Decorte y font écho. Hélas, en nous laissant une impression de déjà lu. Cette constatation nous mène au cœur du malaise que provoque cet ouvrage. Le lecteur pressé risque de ne pas s’attarder sur les deux pages et dix lignes qui constituent la préface maladroite du livre et de garder ainsi l’impression d’avoir entre les mains les actes d’un colloque scientifique. Qu’il se détrompe! Les textes réunis ici ont été lus à Louvain-la-Neuve lors d’un séminaire de troisième cycle devant une poignée d’étudiants. Autant dire que la plupart des collaborateurs se sont contentés, comme de juste, d’exposer les résultats de travaux déjà anciens. Mais quel est l’intérêt de publier ces textes? (shrink)

La postérité n'a guère retenu de Pierre Nicole que sa collaboration avec Antoine Arnauld pour la rédaction de la Logique dite de Port-Royal. Pourtant ce janséniste hétérodoxe, dévolu à l'enseignement du latin dans les petites écoles, a eu une influence durable sur les hommes de son temps. Un rien pour avoir fait, sous le pseudonyme de Wendrock, la traduction latine des Provinciales, un peu pour avoir participé à la première édition des Pensées, beaucoup pour être l'auteur d'une cinquantaine d'Essais de (...) morale qui furent régulièrement republiés jusqu'à la fin du XVIIIe siècle, ainsi que l'attestent les vingt-cinq volumes de l'édition Desprez de 1771. Le choix présenté ici par Laurent Thirouin reprend dix des Essais parmi les plus représentatifs, de ceux publiés du vivant de l'auteur. Le texte reproduit est celui de la dernière édition publiée du vivant de Nicole, en 1693. L'éditeur a donc privilégié le dernier état de la pensée de l'auteur. La genèse de cette pensée est, quant à elle, négligée. On le regrettera, sans le reprocher. (shrink)

Le discrédit tenace dont souffre le Moyen Âge laisse apparaître dans son tissu les grandes trouées d'un intérêt presque exalté focalisé essentiellement sur une invention médiévale inouïe, celle de l'amour passion. Depuis la Seconde Guerre mondiale, plusieurs auteurs ont attiré l'attention sur cette question de l'amour dans la pensée médiévale, question qui avait pourtant jusqu'alors peu retenu les spécialistes de cette période. Les lectures depuis se multiplient. Il y a eu, entre autres, les trois grandes lectures de l'abbé Pierre Rousselot, (...) d'Anders Nygren et de Denis de Rougemont; il y a eu le Séminaire que Lacan a consacré à cette «affaire» médiévale de l'amour en 1973 et qui s'appuyait précisément sur les trois commentaires précédemment cités, et cela de préférence à des textes plus traditionnels tels que La Nouvelle Héloïse ou les Lettres de la religieuse portugaise; il y a eu aussi les commentaires de Georges Duby et d'Ivos Margoni; il y a, enfin, la belle et forte lecture de Charles Baladier dont il est ici rendu compte. (shrink)

Comprehensive analysis of proteins to evaluate their genetic diversity, study their differences, and respond to the tensions is the main subject of an interdisciplinary field of study called proteomics. The main objective of the proteomics is to detect and quantify proteins and study their post-translational modifications and interactions using protein chemistry, bioinformatics, and biology. Any disturbance in proteins interactive network can act as a source for biological disorders and various diseases such as Alzheimer and cancer. Most current computational methods for (...) discovering protein complexes are usually based on specific topological characteristics of protein-protein networks. To identify the protein complexes, in this paper, we, first, present a new encoding method to represent solutions; we then propose a new clustering algorithm based on the genetic algorithm, named PPI-GA, employing a new multiobjective quality function. The proposed algorithm is evaluated on two gold standard and real-world datasets. The result achieved demonstrates that the proposed algorithm can detect important protein complexes, and it provides more accurate results compared with state-of-the-art protein complex identification algorithms. (shrink)

The organic-rich Lower Silurian Longmaxi and Upper Ordovician Wufeng Shale is one of the most important marine shale gas plays in southern China, with relatively high thermal maturity and complex structural evolution. The delineation of the Jiaoshiba shale gas play has been highly successful for the LSLUOWS in the Fuling area of southeastern Sichuan Basin. The drilling targets the basal part of the LSLUOWS, where the approximately 38–45 m of organic-rich section corresponds to a maturity range around 2.2%–3.0% Ro, with (...) high brittle mineral content. The produced shale gas displays a clear reversal in the stable carbon isotopes. The shale gas play zone is between the overlain mudstone in the Middle-Upper Longmaxi Formation and the underlain Upper Ordovician tight limestone in the Jiancaogou Fm. The shale gas reservoir is overpressured, with an average pressure coefficient of 1.55. From December 2013 to late 2014, results of production tests determined relatively stable pressure and production curves. Fifty prolific gas wells have been completed to date in the Jiaoshiba Shale Gas Field in Fuling. Preliminary study revealed several characteristics of this structurally complex shale play that are distinctly different from those in the United States, including an anticlinal structure with mild deformation, abundant free gas, and very short gas migration through microfractures, the natural fracture network formed by the two fault systems, and the slip parallel to the layer in the basal LSLUOWS. Movement along strike-slip faults has gone through up into the Quaternary, which is considered to be a significant factor in the establishment and preservation of the overpressured region in the LSLUOWS. (shrink)

As gas hydrate energy assessment matures worldwide, emphasis has evolved away from confirmation of the mere presence of gas hydrate to the more complex issue of prospecting for those specific accumulations that are viable resource targets. Gas hydrate exploration now integrates the unique pressure and temperature preconditions for gas hydrate occurrence with those concepts and practices that are the basis for conventional oil and gas exploration. We have aimed to assimilate the lessons learned to date in global gas hydrate exploration (...) to outline a generalized prospecting approach as follows: use existing well and geophysical data to delineate the gas hydrate stability zone, identify and evaluate potential direct indications of hydrate occurrence through evaluation of interval of elevated acoustic velocity and/or seismic events of prospective amplitude and polarity, mitigate geologic risk via regional seismic and stratigraphic facies analysis as well as seismic mapping of amplitude distribution along prospective horizons, and mitigate further prospect risk through assessment of the evidence of gas presence and migration into the GHSZ. Although a wide range of occurrence types might ultimately become viable energy supply options, this approach, which has been tested in only a small number of locations worldwide, has directed prospect evaluation toward those sand-hosted, high-saturation occurrences that were presently considered to have the greatest future commercial potential. (shrink)

Lors du séminaire de 1962 sur la conférence Temps et Être, Jean Beaufret prit la parole pour dénoncer l’amalgame hâtif trop souvent fait entre la pensée de Heidegger et celle de Hegel : « Ainsi prévaudrait largement en France, annonçait-il, l’impression que la pensée de Heidegger est une reprise - comme approfondis­sement et comme élargissement - de la philosophie de Hegel ». Lors de ce séminaire, qui abordait une pléthore de penseurs es­sentiels, seul Hegel d’ailleurs fut abordé en propre, e..

Comment Augustin caractérise-t-il la volonté ? Cet article dégage les quatre axes dramatiques sur lesquels se déploie la conception augustinienne de la volonté : 1° la volonté comme tentation de la transgression (désobéissance) ; 2° la volonté comme impuissance (c'est-à-dire rupture entre le désir et son accomplissement); 3° la volonté comme effort ; 4° la volonté comme instance décisoire (cause spirituelle).