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164 results on '"Ivanov, Ivan V."'

2. Perceptual metaphysics: <italic>the case for composites</italic>.

Author

Ivanov, Ivan V. and Schipper, Arthur

Subjects
*METAPHYSICS, *CONSCIOUSNESS, *PHENOMENOLOGY, *REALISM, *ARGUMENT, *PICTURES
Abstract

In this paper, we propose an account of how perceptual evidence might allow us to draw justified conclusions about the existence of composite objects. We call the thesis at issue PERCEPTUAL ADEQUACY, and argue that a specific, naïve realist picture of the phenomenal character of perception provides us with a straightforward way to defend it. The claim that we have empirical evidence for the existence of macroscopic composites cannot be propped up merely by the plausible claim, granted by many, that our perceptual experiences have composites-presenting phenomenology. Rather, a specific account of the nature of the phenomenology is needed so that it can provide the required evidence. We propose a way to accomplish this: one on which in the good cases it would be constituted by the presentation of the truth-makers of the relevant ontological claims. We argue, further, that this potential defence of a feasible empirically-informed approach to metaphysics is preferable to the best alternative, one based on an object-dependent version of intentionalism about perceptual consciousness. [ABSTRACT FROM AUTHOR]

Published
2024
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3. Bad to the bone: essentially bad perceptual experiences.

Author

Ivanov, Ivan V.

Subjects
*HALLUCINATIONS, *CONSCIOUSNESS, *AWARENESS, *REALISM, *PUZZLES
Abstract

Naïve realists have a motive to but have thus far been unable to offer compelling reasons for positing an external constraint on the occurrence of the consciousness involved in perfect hallucinations. If the occurrences of such consciousness were confined to abnormal perceptual contexts, the possibility of perfect hallucinations would have no bearing on the nature of the consciousness involved in cases of perception. On the other hand, it is unclear why the character of the perceptual context should matter constitutively to the occurrence of the sort of consciousness involved in perfect hallucinations. Supposing (reasonably) that such consciousness does not consist in an awareness of the environment, it is puzzling why the latter should be a certain way for the former to occur. I propose a solution to this puzzle, which helps secure the naïve realist approach to perception. Perfect hallucinatory experiences issue from exercises of the perceptual system operating in a second, defective mode – complementary to the normal one, whose exercises issue in an awareness of the environment. [ABSTRACT FROM AUTHOR]

Published
2024
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11. Observational concepts and experience

Author

Ivanov, Ivan V.

Subjects
153, BD Speculative Philosophy
Abstract

The thesis is intended to contribute to the growing understanding of the indispensable role played by phenomenal consciousness in human cognition, and specifically in making our concepts of the external world available. The focus falls on so called observational concepts, a type of rudimentary, perceptually-based objective concepts in our repertoire — picking out manifest properties such as colors and shapes. A theory of such concepts gets provided, and, consequently, the exact role that perceptual consciousness plays in making concepts of this sort available gets settled. In the first half of the thesis, observational concepts get construed as a special type of recognitional concepts. On an analogy with perceptual demonstratives, having such concepts would involve having non-trivial knowledge of their reference. The experiential basis of such concepts would, among other things, provide for such constitutive knowledge. The theoretical background relevant to the hypothesis gets provided in the first chapter. A defence of the hypothesis follows in the second. In the second half of the thesis, care is taken to distinguish among two ways in which the constitutive knowledge of the reference of an observational concept could be fleshed out. In the third chapter, perceptual experience is shown to provide the basis both for knowledge of observational properties by acquaintance, and for knowledge of the essence of such properties — provided that knowledge of essence gets construed in the right, modest way. It might be natural to take knowledge by acquaintance to be the sort relevant to observational concept possession, especially given that in the case of perceptual demonstratives this is the role likely played by experience. However, this initial impression proves to be mistaken. The constitutive knowledge of the referent of an observational concept turns out to consist in the capacity to determine a priori the essence of the respective property. To show this, an argument gets provided in the penultimate fourth chapter, based on the key role played by experiences of instances of observational properties in optimal viewing conditions in enabling the possession of the respective observational concept.

Published
2016

16. Copolyimide molecular brushes with poly(methacrylic acid) side chains as additive to polyphthalamide membrane: Organization, physical, and transport properties.

Author

Ivanov, Ivan V., Polotskaya, Galina A., Kuryndin, Ivan S., Sokolova, Maria P., and Yakimansky, Alexander V.

Subjects
METHACRYLIC acid, BUTYL methyl ether, POLYMERIC membranes, ATOMIC force microscopy, POLYIMIDES, PERVAPORATION
Abstract

Macromolecules of complex architecture find application as modifiers of commercial polymeric membrane materials. In this work, copolyimide molecular brushes (coPI) composed of polyimide backbone and poly(methacrylic acid) side chains were used to modify poly(m-phenylene iso-phthalamide) (PPA). Structure, physical, mechanical, and transport properties of dense nonporous PPA/coPI membranes containing up to 10 wt% coPI were studied. The effect of included coPI on the membrane structure was estimated using atomic force microscopy and mechanical tests. The coPI modifier contributes to the additional formation of free volume elements evenly distributed throughout the membrane. Transport properties of PPA/coPI membranes were investigated via sorption tests and pervaporation separation of methanol (MeOH) and methyl tert-butyl ether (MTBE) mixtures. The inclusion of coPI modifier in the PPA membrane leads to an increase in the total flux of the membrane. The highest separation factor was found for the PPA/coPI membrane containing 10 wt% coPI; transport properties of the best membrane were compared with the literature data on separation of the azeotropic MeOH-MTBE mixture. [ABSTRACT FROM AUTHOR]

Published
2024
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25. Exploring Coumarin-Based Boron Emissive Complexes as Temperature Thermometers in Polymer-Supported Materials

Author

Pedro, Gonçalo, primary, Duarte, Frederico, additional, Cheptsov, Dmitrii A., additional, Volodin, Nikita Yu., additional, Ivanov, Ivan V., additional, Santos, Hugo M., additional, Capelo-Martinez, Jose Luis, additional, Cuerva, Cristián, additional, Oliveira, Elisabete, additional, Traven, Valerii F., additional, and Lodeiro, Carlos, additional

Published
2023
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32. Synthesis and Characterization of Novel 2-Acyl-3-trifluoromethylquinoxaline 1,4-Dioxides as Potential Antimicrobial Agents

Author

Buravchenko, Galina I., primary, Maslov, Dmitry A., additional, Alam, Md Shah, additional, Grammatikova, Natalia E., additional, Frolova, Svetlana G., additional, Vatlin, Aleksey A., additional, Tian, Xirong, additional, Ivanov, Ivan V., additional, Bekker, Olga B., additional, Kryakvin, Maxim A., additional, Dontsova, Olga A., additional, Danilenko, Valery N., additional, Zhang, Tianyu, additional, and Shchekotikhin, Andrey E., additional

Published
2022
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40. Comparison of analgesic efficacy and fetal effects between transdermal administration of fentanyl and intramuscular administration of buprenorphine in pregnant sheep

Author

Padgett, Ashley L., primary, Lepiz, Mauricio L., additional, Mackay, Evelyn E., additional, Driskill, Austin J., additional, Ivanov, Ivan V., additional, Fajt, Virginia R., additional, Konarik, Megan M., additional, Mays, Travis P., additional, and Washburn, Shannon E., additional

Published
2020
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