6,773 research outputs found
Maturana’s Autopoietic Hermeneutics Versus Turing’s Causal Methodology for Explaining Cognition (Reply to A. Kravchenko (2007) Whence the autonomy? A comment on Harnad and Dror (2006)
No full textKravchenko (2007) suggests replacing Turing’s suggested method for explaining cognizers’ cognitive capacity through autonomous robotic modelling by ‘autopoeisis, Maturana’s extremely vague metaphor for the relations and interactions among organisms and their environments. I suggest that this would be an exercise in hermeneutics rather than causal explanation
Book review: Kravchenko S. A. “Sociology of Digitalisation: university textbook”
No full textThe review of a new book written by a leading Russian sociologist-theorist Sergey A. Kravchenko is presented. The book analyses the social implications and prospects of the digitalisation. The objectivity of this process leading to the complication of society, its dehumanisation and the emergence of new previously unseen risks, is noted. Scientific and technological innovations reduce the share of traditional risks, natural and technological, but increase the share of institutional risks. Sergey A. Kravchenko calls this new reality the socio-digital-natural reality, in which, primarily in social networks, both human actors and non-human (digital) actors, sociotechnical and techno-social hybrids operate. The author of the book being reviewed concludes that there is a need for a humanistic digital turn, a change in approaches and focus of modern scientific knowledge, which should be integrated and multidisciplinary, based on the social and natural sciences integration, aimed at the analysis of disequilibrium systems in which disequilibrium, turbulence do not exclude the tendencies towards organisation and self-organisation.The peer-reviewed work is an educational publication and it is aimed at developing students’ ability to think critically about the consequences of digitalisation and make balanced managerial decisions. It introduces students to the most modern and advanced sociological theories and concepts
THERMODYNAMIC ANALYSIS OF PERIODIC OPERATION AMMO-NIA-WATER ABSORPTION REFRIGERATION UNITS IN ATMOSPHER-IC WATER GENERATION SYSTEMS
No full textOzolin N. E. THERMODYNAMIC ANALYSIS OF PERIODIC OPERATION AMMO-NIA-WATER ABSORPTION REFRIGERATION UNITS IN ATMOSPHER-IC WATER GENERATION SYSTEMS / N. E. Ozolin, V. V. Kravchenko ; supervisor A. S. Titlov // Проблеми формування здорового способу життя у молоді : зб. матеріалів ХIІ Всеукр. наук.-практ. конф. молодих учених та студентів з міжнар. участю, Одеса, 03–05 жовт. 2019 р. / Одес. нац. акад. харч. технологій ; гол. ред. О. М. Кананихіна. – Одеса : ФОП Бондаренко М. О., 2019. – P. 403–405
MIGRATION CAPITAL AS A FACTOR OF FORMATION OF THE FINANCIAL POTENTIAL OF THE NATIONAL ECONOMY
No full textThe article the main scientific approaches to determining the financial potential and factors of its formation; the definition of migration capital, the author analyses modern tendencies of movement. It is proved that the remittances of labour migrants have a significant impact on the formation of financial capacity as the host country and exporting countries of labor force. Listed on potential socio-economic threats, which may be due to excessive attraction of migration capital into donor countries of labor migration and its outflow from the donor countries, the migration of capital; the necessity of state regulation of migration processes
Organizational Effectiveness and Efficacy: Relations between Two Concepts.
No full textOrganizational effectiveness was proposed as an attempt to define “objective” criteria of companies’ high performance (1 citaz). Competing values approach was a comprehensive model of effectiveness. (Quinn & Rohrbaugh, 1981) but difficulties in comparing employees evaluations of objective measures of effectiveness within the same organization and across different organizations emerged. Therefore interest in the concept vanished in early 90s.
More recently organizational efficacy was introduced to assess employees’ perception of effective performance (Bandura, 1997); questionnaires to measure this concept have been developed allowing to compare the overall level of efficacy of different organizations (Bohn, 2010; Borgogni et al., 2001, 2009).
Here we propose to use organizational effectiveness as a subjective measure of organizational performance, similarly to organizational efficacy. The competing values approach would offer a detailed organizational profile according to its established set of criteria, while organizational efficacy allows to evaluate the overall level of efficacy. This will allow to have a multi-faceted perception of organizational performance and to compare different organizations’ performance.
Leadership and engagement are also proposed as predictors of efficacy.
We aim to test this model using success in internationalization as operationalization of companies high performance
D. García-Galindo, A. Rezeau, A. Samper , E. Karampinis, P. Grammelis, G. Simatou, M. Monteleone, F. Volpe, T. Zheliezna , A. Kravchenko, L.F. Calaim, C. Poutrin, T. Radic, E. Font de Mora. 2016. Setting up and running sustainable supply of woody biomass from agrarian pruning and plantation removal. scope and European initiative. Proceedings of the 24th European Biomass Conference and Exhibition.
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Measurement of Collins asymmetries in inclusive production of charged pion pairs in e+e− annihilation at BABAR
No full textWe present measurements of Collins asymmetries in the inclusive process e+e−→ππX, where π stands for charged pions, at a center-of-mass energy of 10.6 GeV. We use a data sample of 468 fb−1 collected by the BABAR experiment at the PEP-II B factory at SLAC, and consider pairs of charged pions produced in opposite hemispheres of hadronic events. We observe clear asymmetries in the distributions of the azimuthal angles in two distinct reference frames. We study the dependence of the asymmetry on several kinematic variables, finding that it increases with increasing pion momentum and momentum transverse to the analysis axis, and with increasing angle between the thrust and beam axis
A comparative analysis of single-port and four-port laparoscopic cholecystectomies in patients with chronic calculous cholecystitis
No full textKravchenko Borys, Klymenko Vladimir, Kravchenko Sergii, Zakharchuk Alexandr, Tumanska Natalya. A comparative analysis of single-port and four-port laparoscopic cholecystectomies in patients with chronic calculous cholecystitis. Journal of Education, Health and Sport. 2019;9(6):514-521. eISNN 2391-8306. DOI http://dx.doi.org/10.5281/zenodo.3333762
http://ojs.ukw.edu.pl/index.php/johs/article/view/7151
The journal has had 7 points in Ministry of Science and Higher Education parametric evaluation. Part B item 1223 (26/01/2017).
1223 Journal of Education, Health and Sport eISSN 2391-8306 7
© The Authors 2019;
This article is published with open access at Licensee Open Journal Systems of Kazimierz Wielki University in Bydgoszcz, Poland
Open Access. This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author (s) and source are credited. This is an open access article licensed under the terms of the Creative Commons Attribution Non commercial license Share alike.
(http://creativecommons.org/licenses/by-nc-sa/4.0/) which permits unrestricted, non commercial use, distribution and reproduction in any medium, provided the work is properly cited.
The authors declare that there is no conflict of interests regarding the publication of this paper.
Received: 10.06.2019. Revised: 24.06.2019. Accepted: 28.06.2019.
A COMPARATIVE ANALYSIS OF SINGLE-PORT AND FOUR-PORT LAPAROSCOPIC CHOLECYSTECTOMIES IN PATIENTS WITH CHRONIC CALCULOUS CHOLECYSTITIS
Borys Kravchenko, Vladimir Klymenko, Sergii Kravchenko, Alexandr Zakharchuk,
Natalya Tumanska
Zaporizhzhia State Medical University, Ukraine
Kravchenko B. S., Postgraduate Student, Department of Postoperative Surgery,
ОRCID: https://orcid.org/0000-0002-1653-7043
Klymenko V. M. Dr. hab. in Medicine, Professor, Department of Hospital Surgery,
ОRCID:0000-0003-4204-1110
Kravchenko S. M., Ph. D. in medicine, Teacher Assistant, Department of Faculty Surgery, ОRCID:0000-0002-1754-2688
Zakharchuk O. V., Ph.D. in Medicine, Teacher Assistant, Department of Faculty Surgery,
ORCID (0000-0001-9891-2419)
Tumanska N. V., Ph.D. in Medicine, Associate Professor,Department of Urology, Radiation Diagnostics and Therapy, ОRCID:0000-0002-42090-7474
Abstract
The objective: To conduct a comparative analysis of the results of single-port and four-port laparoscopic cholecystectomies in patients with chronic calculous cholecystitis. Materials and methods. During 2015 – 2017 years 214 patients underwent surgery for chronic calculous cholecystitis. All patients were divided into 2 groups. The first group consisted of 102 (47.6%) patients, who underwent single-port laparoscopic cholecystectomy (SILC). The second included 112 (52.3%), for whom standard laparoscopic cholecystectomy was performed. The results in both groups were compared on the following criteria: 1) patient characteristics: age, sex and body mass index (BMI); 2) the duration of surgical intervention; 3) the total time of the patient hospitalisation; 4) the presence of drainage in the abdominal cavity; 5) anaesthetic assessment of the patient's physical condition prior to surgical intervention (classification of ASA); 6) the level of pain within 6 hours after the operation – visual analogue scale (VAS; from 0 to 10, where 0 – no pain, 10 – maximum pain); 7) the necessity for the administration of opioid analgesics in the postoperative period; 8) the presence of complications arose during surgery (bleeding, injury of the common bile duct, gallbladder perforation, leak of bile into the abdominal cavity); 9) the postoperative quality of life, cosmetic outcome (evaluation was performed using the 4-Likert scale. Results. When choosing access to remove the gallbladder, it is important to evaluate carefully the patient's data before surgery. The age of the patient, the presence of concomitant diseases, BMI, patient tolerance to the expected mode of operation play an important role. The history of proven acute cholecystitis, frequent biliary colics determine the performance of laparoscopic 4-ports cholecystectomy. Umbilical hernia can be used to place a port for interference through one-port access. When planning a single-port operation, one should be aware of the possibility of intra-operational occurrence of technical difficulties that may require the installation of additional trochars. Conclusions. The single-port method is a modern safe operation, one of the alternatives to the traditional four-port cholecystectomy, which causes the best cosmetic result of a low level of postoperative pain. Both technologies should not be opposed, but, on the contrary, it is necessary to combine and connect the advantages of both technologies in order to achieve the optimal result of surgical treatment.
Key words: single-port access, laparoscopic cholecystectomy, cholelithiasis, chronic calculous cholecystitis
Photolithographic fabrication of periodic nanostructures for photonic applications
No full textArtificial micro- and nanostructures have already found numerous applications in various sectors of optics and photonics. Periodic patterns are used as diffraction gratings, photonic crystals, ultrathin polarizers and wave retarders, antireflection coatings, optical filters, plasmonic waveguides, optical antennas and sensors, as well as substrates for surface enhanced fluorescence and Raman spectroscopy (SERS). Surface micro- and nanostructures have also been demonstrated to exhibit superhydro- and superoleophobicity and, for example, the so-called structural colors that do not use any dyes. These properties can lead to fascinating applications, e.g., in self-cleaning eyeglasses and touchscreens, as well as in various types of displays.
This thesis describes the development of a set of nanofabrication techniques for manufacturing nanoscale optical components. One of the key ideas was to switch from conventional photolithography based on photoresist to a new type of maskless lithography making use of azobenzene-containing polymers (azo-polymers). This transition fundamentally changes the fabrication process, for example, eliminating wet processing steps, such as photoresist development and stripping. The azo-polymer-based interference lithography developed in this thesis is a fast and simple technique to pattern large-area arrays of perfectly ordered nanofeatures. In addition, the azo-polymers are insensitive to humidity and temperature fluctuations, as well as to stray light. These properties make them an attractive alternative to traditional photoresists.
The invented nanofabrication technique was shown to be capable of patterning various materials, such as semiconductors, glass and metals. Using the technique we have fabricated various optical elements, such as plasmonic filters, ultrathin polarizers, all-metal reflective waveplates and substrates for surface enhanced Raman scattering with various degree of complexity. Maskless lithography allows for fast adjustment of the pattern parameters and nearly instant prototyping. The scaling up capability of the technique, meanwhile, opens up the door to industrial applications
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