Essays on Plato
2018
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Abstract
Includes “Polytheism and Metaphysics (I): Divine Relation,” “Plato’s Gods and the Way of Ideas,” “Animal and Paradigm in Plato,” “Esoteric City: Theological Hermeneutics in Plato’s Republic,” “Polytheism and the Euthyphro,” the previously unpublished “Toward a New Conception of Platonic Henology,” and “On the Gods and the Good”.
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The von Kirmin vortex street behind a circular cylinder in a laminar homogeneous jet core is experimentally investigated. The Strouhal-Reynolds number relationships are measured for various shear-layer thicknesses and aspect ratios. The experimental Strouhal number values are found to collapse with the discrete vortex shedding modes, which were observed for boundary-layer end conditions. The results indicate that the shedding modes are independent from the end conditions, but are an intrinsic feature of the shedding process of an infinitely long cylinder. The experimentally assumed shedding mode, however, is strongly dependent of the geometric parameters, like the shear-layer thickness and the aspect ratio. The observed tendencies can be made physically plausible.
Overpopulation -ay isang kalagayan kung saan ang isang organismo 's mga numero lampasan ang kakayahan magpadala ng kanyang tahanan. In common parlance, the term usually refers to the relationship between the human population and its environment , the Earth . Sa karaniwang paraan ng pagsasalita, ang mga kataga ay karaniwang tumutukoy sa mga relasyon sa pagitan ng mga populasyon ng tao at sa kanyang kapaligiran, ang Earth.
In the presented article the author gives a semantic description of four language units based on verbs odnosić się and dotyczyć, namely the units cośi dotyczy1 kogośj / czegośj, cośi dotyczy2 kogośj / czegośj, coś1 odnosi się1 do kogośj / czegośj and ktośl odnosi się2 [w czymśi] do czegośj. The units cośi dotyczy1 kogośj / czegośj and ktośl odnosi się2 [w czymśi] do czegośj indicate an object of an information presented in a given medium. As far as the latter is used only for speaking of a verbal medium, the former places no such restrictions on cośi. Cośi odnosi się1 do kogośj / czegośj ascribes a verbal entity to an object, stating that what is said can be attached to the mentioned object. Cośi dotyczy2 kogośj / czegośj describes a relation between a matter that is spoken about (cośi) and an object (kimśj / czymśj) which nature can be understood by the presented relation.
Archives of materials science and engineering, 2014
Purpose: This study compares the material removal performance of hardened steels DIN 115CrV3 coated with TiN and CrN using PVD method. Design/methodology/approach: New on-line monitoring wear system, thermal imager, and weight loss method were used to analyze to quantify and compare with uncoated tools. Findings: The results of abrasive wear experiments showed that weight loss increased with an increase in load applied for all tools. The microstructure and chemical analysis of each of the three tools showed some traces of abrasion and galling of Manganium from the workpiece. During abrasion test, thermal imager showed lower heating on the CrN coated tools. On-line wear analysis results show that at the low cutting speed (18 m/min), TiN-coated tools performed a higher wear resistance compared to rivals while at higher cutting speed CrN slightly show superior efficiency. The microstructure analysis of the tools confirmed fracture and galling on each of the tools. Research limitations/implications: : For future work, ceramic nano-coating on cutting tools can provide better wear resistance than ceramic micro coating. Practical implications: Involve to use cheaper tools with higher mechanical properties. Usually, the cutting tools made from ceramic coating show an adequate level of wear resistance against the workpiece. Those tools ,with the limited processing, can be used for machining soft steels. Originality/value: New on-line method and thermal imager used in this study and for the first time DIN 115CrV3 was evaluated as cutting tools.
Nukleonika, 2005
Radiostrontium 85 Sr sorption experiments were carried out at 4°C and 20°C using natural samples of the epiphytic foliose lichen Hypogymnia physodes. Thalli were incubated in water solutions containing 10 −5 to 10 −1 mol. l −1 SrCl 2 for up to 24 h at the initial pH 5.5. Sorption equilibrium at 4°C and 20°C was observed within 1 hour and did not change within the next 24 hours. Sorption process can be described well by Freundlich adsorption isotherm in both linearised and non-linearised form, not by Langmuir adsorption isotherm. Inactivation of lichen biomass by formaldehyde or temperature pretreatment did not cause loss of biosorption activity. 85 Sr biosorption was strongly pH dependent increased from negligible values at pH 2 up to nearly 100% uptake at pH 5.5. Bivalent cations Me 2+ act as competitors for 85 Sr biosorption with the competition effect increasing in the order Co < Mg < Ca < Cd < Ni < Ba < Zn < Cu for Me 2+ concentration 0.01 mol. l −1. A number of displacing agents have been tested for their ability to release extracellular bound 85 Sr 2+ ions from Hypogymnia physodes. Displacing efficiency increases in the order: water <<< EDTA (acid) < NaHCO 3 < Na 2 EDTA < oxalic acid < BaCl 2 < MgCl 2 < CaCl 2 < SrCl 2. Efficiency of strontium biosorption by different lichen taxa will reveal their role in fixation of radiostrontium contamination in biosphere.
Trends in Contemporary Italian …
Molecular Mechanisms of Plant …, 2008
Tesis l Maestría en Didáctica del Español y la Literatura, 2017
La presente investigación aborda un estudio sobre la comprensión auditiva, una de las habilidades fundamentales durante el proceso de enseñanza-aprendizaje del español como lengua extranjera, cuyo origen se estableció acorde a las experiencias y dificultades encontradas en el contexto educativo de los estudiantes no hispanohablantes de la Facultad Preparatoria de la Universidad de Ciencias Médicas de La Habana. En la investigación se utilizaron métodos teóricos, empíricos y estadísticos, los que permitieron identificar como debilidad el insuficiente desarrollo de la comprensión auditiva en el proceso de enseñanza-aprendizaje del español como lengua extranjera, así como la necesidad de aplicar un nuevo enfoque durante el mismo. Por tal motivo se propone un sistema de ejercicios que contribuya al desarrollo de la comprensión auditiva mediante el uso de la canción cubana en el proceso de enseñanza-aprendizaje del español como lengua extranjera, basado en el enfoque cognitivo, comunicativo y sociocultural en la Facultad Preparatoria de la Universidad de Ciencias Médicas de La Habana. La propuesta posee canciones pertinentes a las temáticas estudiadas en la preparatoria, con ejercicios de comprensión auditiva y el empleo de una dinámica motivadora que facilita el desarrollo de esta macrohabilidad. Fue validada por un grupo de especialistas con vasta experiencia en el tema tratado, de acuerdo al carácter novedoso de la investigación.
Journal of Sandwich Structures and Materials, 2012
Honeycomb composite structures are used in airplanes, railway cars and vehicles. The sandwich panels consist of two stiff face sheets of aluminium, which are bonded to a very lightweight honeycomb core of aluminium. Compared to normal plates, sandwich panels have a very high stiffness and simultaneously a low weight. The core of these structures is mainly subjected to shear stresses. The shear stresses depend strongly on the angle of the load application. The distribution and the level of the shear stresses are investigated using analytical calculations. The load direction which induces highest stresses in the honeycomb core is derived. This direction is not the W-direction, which is the most compliant one. When doing finite element simulations of honeycomb cores, often the core is homogenized in order to reduce the calculation time. In this article, some equations are derived in order to calculate the real shear stresses from the shear stresses of the homogeneous core. The equation...
For more information about my work, see http://henadology.wordpress.com/
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Helvetica Physica Acta, 1998
A theory of non-unitary unbounded similarity transformation operators is developed. To this end the class of J-unitary operators U is introduced. These operators are similar to unitary operators in their algebraic aspects but differ in their topological properties. It is shown how J-unitary operators are related to so-called J-biorthonormal systems and J-selfadjoint projections. Families U_a of J-unitary operators define in a natural way a Frechet subspace of the Hilbert space H, the dual space of which constitutes an extension of H. The J-selfadjoint Hamilton operator H can also be regarded as a restriction of an operator H_0 defined on the extension of the Hilbert space. The advantages of a J-unitary transformation theory and the relation to other approaches in scattering theory are discussed.
Journal of chemical …, 2001
This paper describes the investigation of the generation of spherical silica particles, which could potentially be used as alternative calibration aerosol for substituting DOP (dioctylphthalate) particles. Silica particles were generated by a spray drying method using a nanometer-sized colloidal silica suspension as the starting material. The generated silica particles have a spherical morphology, are nearly monodispersed and their size can be controlled at submicron order. The smoothness of the particle surface is greatly affected by the size of the colloidal silica particles used. Silica aerosol particles were also generated by the spray pyrolysis of an aqueous solution of tetraethylorthosilicate (TEOS), in order to compare their properties with those of silica particles obtained by spray drying method. The electrical mobility equivalent diameter of silica particles generated by spray drying method is in good agreement with the diameter determined by SEM observation. The light scattering characteristics of the silica aerosol particles were also measured using a laser particle counter and compared with a polystyrene latex (PSL) aerosol. By increasing the drying temperature of the silica sol droplets to 1200°C, the change of scattered light intensity with particle diameter shows a tendency similar to that of spherical PSL particles. Consequently, the spherical submicron silica particles generated by the present spray drying method appear to be applicable to the test of air filters.
2004
Abstract We study peer-to-peer service networks consisting of autonomous agents who seek and provide information services. Agents potentially help each other by giving referrals to guide the search. Each agent autonomously decides whom to contact for a service and whom to provide a service or a referral. Service networks evolve as the agents change their neighbors to improve how their needs are fulfilled. If an agent autonomously decides to, it may cache some responses from other (information) services.
With the popularity of voting systems in cyberspace, there is growing evidence that current voting systems can be manipulated by fake votes. This problem has attracted many researchers working on guarding voting systems in two areas: relieving the effect of dishonest votes by evaluating the trust of voters, and limiting the resources that can be used by attackers, such as the number of voters and the number of votes. In this paper, we argue that powering voting systems with trust and limiting attack resources are not enough. We present a novel attack named as Reputation Trap (RepTrap). Our case study and experiments show that this new attack needs much less resources to manipulate the voting systems and has a much higher success rate compared with existing attacks. We further identify the reasons behind this attack and propose two defense schemes accordingly. In the first scheme, we hide correlation knowledge from attackers to reduce their chance to affect the honest voters. In the second scheme, we introduce robustness-of-evidence, a new metric, in trust calculation to reduce their effect on honest voters. We conduct extensive experiments to validate our approach. The results show that our defense schemes not only can reduce the success rate of attacks but also significantly increase the amount of resources an adversary needs to launch a successful attack.
The International Journal of the Platonic Tradition, 2008
One of the major puzzling themes in the history of Platonism is how theology is integrated with philosophy. In particular, one may well wonder how Plato's superordinate first principle of all, Idea of the Good, comes to be understood by his disciples as a mind or in some way possessing personal attributes. In what sense is the Good supposed to be God? In this paper I explore some Platonic accounts of the first principle of all in order to understand where the integration of the personal into the metaphysical is organic and where it is not. I conclude that the “ontological” and the “henological” construals of the first principle of all differ in their openness to “intellectualizing” that principle.
Diotima: Review of Philosophical Research (Hellenic Society for Philosophical Studies, Athens), 2011
Book Proposal for: Bound by Goodness, Ruled by Reason: Plato's Theology and the Foundations of his Cosmology Theology constitutes both the core content of Plato’s cosmology and a key metaphysical foundation for Platonic cosmology as such. To put it another way, when Plato seeks to describe the most essential structures and functions of the sensible world he gives an account of gods; when Plato seeks to explain how it is possible for there to be perpetually beautiful, rational, and living divinities in a sensible world of otherwise constant and unstable generation and destruction, there too his answer looks to god. This book attempts to develop and detail an accurate and coherent account of Plato’s theology and to identify the several philosophical problems Plato devised it to address. It carefully reconstructs his views about the various kinds of entities identified by him as gods, their relationships to one another and the universe as a whole, and the roles they serve in his overall worldview. Such a study is very much needed, for while interest in Plato’s theology has been steadily growing, no full-length, systematic treatment of the subject has been written in English. This is the first book of its kind to give a thorough treatment of all the relevant texts from across Plato’s corpus; to examine all the relevant features or “parts” of his theology: the World-soul and other cosmic souls, “Nous” (i.e. reason or intellect), the Demiurge (Craftsman), the Form of the GOOD; and to attempts to organize the interpretation of all of these into a new, coherent narrative situating Plato’s theology centrally within his late thought. Moreover, while several good books and articles have been written on the subject, nearly all the work that has been done on Plato’s theology for the last 80 years has recapitulated or offered only minor variations on one of the same three or four inadequate interpretative schemes, all of which were developed before the Second World War. Thus progress on the topic has been at a standstill for more than three quarters of a century. This book offers to break this deadlock and to offer a novel interpretation by resolving the central dilemma over Plato’s theology that has made fully coherent and well-motivated interpretations impossible. To do so, it rejects the identification of the Craftsman god (Demiurge) of his Timaeus and other dialogues with “Nous” (reason or intellect)—an identification that is the common, shared assumption of all of the unsuccessful contemporary interpretations as well as of nearly every historical interpretation of Plato’s theology in the long history of its reception. While I am proposing to do away with an interpretive orthodoxy, the result is a clearer view of the Demiurge, Nous, and their respective key roles in Plato’s late metaphysics and cosmology. Table of Contents PART I – FOREGROUND AND BACKGROUND Chapter 1. Introduction to Plato’s Theology: Themes, Questions, and Methods Chapter 2. The Ancient Quarrel: Traditional Greek religion and its philosophical critics PART II – IMMANENT THEOLOGY Chapter 3. The Goals of Plato’s Public Theology Chapter 4. The Implementation Problem and the Panpsychic Solution Chapter 5. The World, the World-soul, and other cosmic gods PART III – TRANSCENDENT THEOLOGY Chapter 6. The Demiurge is the GOOD Chapter 7. The Demiurge is not Nous Chapter 8. Pre-panpsychic Intellect?: Cosmic Intellect and the World-soul in the Philebus PART IV – INTERSTITIALS AND INTERCESSORIES Chapter 9. Culture-Heroes, Daemons, and the Gods of Tradition Conclusion
The Daimon in the Myth of Er (Resp. 10 617E-620E) In Book 2 of Republic Socrates critiques traditional theology by asserting that “god is altogether simple and true in deed and word, and neither changes himself nor deceives others (382E-383A)”, absolving divinity of responsibility for human evil. While Socrates’ discussion remains primarily negative, the myth of Er in Book 10 offers a complementary perspective. This myth elucidates the soul’s journey after death and its selection of a future life for embodiment, attributing sole responsibility to the soul. Consistently with Socrates’ theological critique, divinity is absolved of accountability for human suffering: theos is anaitios (Resp. 10 617E). No daimon casts the lot but the soul chooses its own daimon. Moreover, the daimon is later depicted as apoplērōtēs, fulfilling the soul’s choice for embodied existence. This paper endeavors to elucidate these references and explores the role of Er’s daimon in human life, tackling the question of how the daimon can be held unaccountable while fulfilling the soul’s choice. Initially, it examines daimons’ functions in Symposium, Phaedo, and Apology, highlighting their intermediary role between gods and humans, facilitating communication, harmonizing cosmic realms, and guiding souls through them—all elements that differentiate them from gods. Notably, individuals deemed “daimonic” possess privileged insight, exemplified by Socrates in Apology, who attributes his moral guidance to a lifelong internal daimonic influence restraining him from acting on certain thoughts. The paper contends that in the myth of Er, the daimon assumes a dual role: guiding souls through the afterlife while also binding them to their chosen destinies in embodied existence by restraining them from acting otherwise—an interference which absolves the daimon of accountability. But unlike Socrates’ daimon in Apology, which merely restrains from evil and is, so to speak, idiosyncratic (see Resp. 6 496C), Er’s daimon prevents all actions contrary to the chosen life, thus facilitating the enactment of the soul’s fate, whether virtuous or malevolent. The myth not only underscores the separation of divinity from human evil but also portrays the daimons as exclusive demi-divine entities accompanying souls inexorably toward their chosen paths, sealing their fates beyond escape.
G. Fine (ed.), The Oxford Handbook of Plato, 2nd edn, 2019
This chapter examines Plato's views on theology. Plato inherited Socrates's conviction that a proper understanding of the divine nature is essential to human virtue and happi ness. Hence, god's essential goodness is the thesis that runs most prominently through all his theological arguments. Since this supreme goodness is manifested above all in the cosmic structures created by divine intelligence, it is understandable if Plato turns out to stick resolutely to his insistence that, for all its appearances of imperfection, from a glob al perspective ours is the best physical world that could ever have been created, even by a supremely powerful being. On the other hand, Plato shows less interest than Socrates did in the idea of divine intervention in individual human lives. To that extent his work in theology points forward to Aristotle, who would insulate god entirely from concern with the sublunary world.
Edward P Butler