Log in

Relevant bibliographies by topics / Insert loss

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers

Academic literature on the topic 'Insert loss'

Author: Grafiati

Published: 28 June 2021

Last updated: 2 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Insert loss.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Insert loss"

1

Nickel, Eric, Kyle Barrons, Barry Hand, Alana Cataldo, and Andrew Hansen. "Three-dimensional printing in prosthetics: Method for managing rapid limb volume change." Prosthetics and Orthotics International 44, no. 5 (June 25, 2020): 355–58. http://dx.doi.org/10.1177/0309364620934340.

Full text

Abstract:

Background and Aim: During post-amputation recovery or rapid body mass change, residual limb volume can change quickly, requiring frequent adjustments or replacement of the socket to maintain fit. The aim of this pilot test was to evaluate the feasibility of using a three-dimensional-printed insert to extend the service life of a prosthetic socket after substantial residual limb volume loss. Technique: One research subject with a well-fitting transtibial prosthetic socket had an oversized socket fabricated to simulate substantial limb volume loss. The digital shapes of the oversized and well-fitting sockets were used to create a three-dimensional-printed insert to restore fit. Discussion: Two-minute walk test distance decreased when using the oversized socket without the insert, but not when using the socket with the insert. Socket comfort score was 8+ under all conditions. These results suggest that three-dimensional-printed inserts may be an effective method of extending the service life of prosthetic sockets when rapid limb volume loss occurs. Clinical relevance Three-dimensional (3D) printing gives prosthetists a new tool to manage large volume changes without refabricating entire sockets. Sockets can be fabricated in anticipation of volume gain/loss, using replaceable 3D-printed inserts to maintain fit and comfort.

APA, Harvard, Vancouver, ISO, and other styles

2

Zang, Liguo, Yizhang Cai, Baosheng Wang, Rongdong Yin, Fen Lin, and Peng Hang. "Optimization design of heat dissipation structure of inserts supporting run-flat tire." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, no. 14 (March 8, 2019): 3746–57. http://dx.doi.org/10.1177/0954407019833562.

Full text

Abstract:

Inserts supporting run-flat tire is a key technology in the field of vehicle active safety. When the vehicle is under zero driving condition, the deformation of the inserts supporting run-flat tire due to compression can cause the tire to be crushed, and loss of adhesion between the tire and rim can lead to separation. These situations can reduce the cruising ability of the vehicle. Under zero driving condition, the insert, which is the main support body for the tire, could rub against the inner part of the tire sharply, thereby generating heat in the tire. Heat in the tire is difficult to dissipate and can accumulate rapidly under this condition. As the temperature of the tire and insert increases, the inserts supporting run-flat tire could fail to support the vehicle. To improve heat dissipation of the insert, a finite element model of the inserts supporting run-flat tire under the condition of zero rolling is established. The steady-state temperature field of the inserts supporting run-flat tire is analyzed using ANSYS Workbench. The insert temperature field and heat flux are solved. The optimization design of axial heat dissipation holes and surface heat dissipation grooves based on experimental and simulation results of the insert is presented. Finally, the optimization structure of the insert is verified using a thermal–mechanical coupling simulation method. The conclusions are of great significance for optimizing inserts supporting run-flat tire and improving zero rolling ability of tire.

APA, Harvard, Vancouver, ISO, and other styles

3

Devhadrao, NV, and M. Siddhaia. "REVIEW ON OCULAR INSERT DRUG DELIVERY SYSTEM." Journal of Drug Delivery and Therapeutics 8, no. 5-s (October 15, 2018): 115–21. http://dx.doi.org/10.22270/jddt.v8i5-s.1991.

Full text

Abstract:

An ocular insert represents an advanced technology in eye disease therapy. Designing and development of an ocular insert is a challenge ever faced by Pharmaceutical researchers or manufacturer. In the ophthalmology; eye drop have ever found to be an easy remedy from the administration point of view. In case of conventional dosage forms the fast precorneal loss of drug has been a major difficulty. To improve ocular drug bioavailability, there are significant guidelines have been directed towards newer drug delivery systems for ophthalmic administration. By means of ocular insert, the researcher has always taken efforts to release the drug at controlled rate to avoid frequent administration of drug. The ocular insert consist of controlled, delayed or sustained release biodegradable implantable components of different material in multiple layers. The inserts can be classified in various classes like Insoluble, soluble or biodegradable as per its solubility. The release of drug from the insert depends upon the diffusion, osmosis, and bioerosion of the drug. Keyword: Ocular inserts, bioerosion, osmosis, bioerodible implant,

APA, Harvard, Vancouver, ISO, and other styles

4

Tillman, E. S., E. O. Hartel, and H. F. Jen. "The Prediction of Flow Through Leading Edge Holes in a Film Cooled Airfoil With and Without Inserts." Journal of Engineering for Gas Turbines and Power 107, no. 1 (January 1, 1985): 92–98. http://dx.doi.org/10.1115/1.3239702.

Full text

Abstract:

A method for predicting cooling air flow rates using tests on cylindrical models of typical turbine blade leading edges has been extended to include blades with inserts and blades with reversed-angled holes. When an insert is used, the pressure loss across the insert can be determined from flow tests and added to other losses in the flow path to determine cooling flow rates. Calculated and experimentally determined flow rates are compared with good agreement. The second experiment was performed to determine internal loss coefficients for reverse-angled holes oriented so the flow makes a reverse turn to enter the holes. The reversed flow case produced significantly greater internal loss coefficients than when the same holes were oriented in the direction of flow. These results were used to predict flow from arrays of reverse- angled holes and from a cylinder containing both reverse-angled holes and nonreversed holes. In all cases, good agreement was found between predicted and measured flow rates.

APA, Harvard, Vancouver, ISO, and other styles

5

Smith, M. Alex, and Michael J. Bidochka. "Bacterial fitness and plasmid loss: the importance of culture conditions and plasmid size." Canadian Journal of Microbiology 44, no. 4 (April 1, 1998): 351–55. http://dx.doi.org/10.1139/w98-020.

Full text

Abstract:

Several pBluescript-derived plasmids of various sizes were constructed to study the effects of multicopy plasmid size on bacterial fitness and plasmid loss. Transformed and untransformed bacterial clones were grown in media with or without ampicillin. Bacterial fitness (measured by growth rate), plasmid presence or absence, and plasmid copy number were assessed during successive subculturings. In selective media (minimal medium or Luria Broth plus ampicillin), the clone transformed with the largest plasmid (pBluescript with a 9000-bp insert) had a significantly longer lag phase than all other clones. In nonselective media the rate of plasmid loss during successive subculturings was greatest in the clone with the largest insert. The clone with the largest insert displayed a lower plasmid copy number than clones with a small insert or no insert at all. Plasmid loss in the form of segregational instability and plasmid copy number reduction in nonselective environments are important to the understanding of the evolution of the bacteria-plasmid associations and the appreciation of the potential for altering the genetic properties of a clone maintained or subcultured on a standard medium.Key words: pBluescript, plasmid, stress, fitness, starvation.

APA, Harvard, Vancouver, ISO, and other styles

6

Logg, Christopher R., Aki Logg, Chien-Kuo Tai, Paula M. Cannon, and Noriyuki Kasahara. "Genomic Stability of Murine Leukemia Viruses Containing Insertions at the Env-3′ Untranslated Region Boundary." Journal of Virology 75, no. 15 (August 1, 2001): 6989–98. http://dx.doi.org/10.1128/jvi.75.15.6989-6998.2001.

Full text

Abstract:

ABSTRACT Retroviruses containing inserts of exogenous sequences frequently eliminate the inserted sequences upon spread in susceptible cells. We have constructed replication-competent murine leukemia virus (MLV) vectors containing internal ribosome entry site (IRES)-transgene cassettes at the env-3′ untranslated region boundary in order to examine the effects of insert sequence and size on the loss of inserts during viral replication. A virus containing an insertion of 1.6 kb replicated with greatly attenuated kinetics relative to wild-type virus and lost the inserted sequences in a single infection cycle. In contrast, MLVs containing inserts of 1.15 to 1.30 kb replicated with kinetics only slightly attenuated compared to wild-type MLV and exhibited much greater stability, maintaining their genomic integrity over multiple serial infection cycles. Eventually, multiple species of deletion mutants were detected simultaneously in later infection cycles; once detected, these variants rapidly dominated the population and thereafter appeared to be maintained at a relative equilibrium. Sequence analysis of these variants identified preferred sites of recombination in the parental viruses, including both short direct repeats and inverted repeats. One instance of insert deletion through recombination with an endogenous retrovirus was also observed. When specific sequences involved in these recombination events were eliminated, deletion variants still arose with the same kinetics upon virus passage and by apparently similar mechanisms, although at different locations in the vectors. Our results suggest that while lengthened, insert-containing genomes can be maintained over multiple replication cycles, preferential deletions resulting in loss of the inserted sequences confer a strong selective advantage.

APA, Harvard, Vancouver, ISO, and other styles

7

Chourasia, Ayushi, and Shikha Agrawal. "DEVELOPMENT AND EVALUATION OF CIPROFLOXACIN HYDROCHLORIDE LOADED OCULAR INSERT BY USING “PLANTAGO OVATA” AS NATURAL POLYMER." International Journal of Current Pharmaceutical Research 10, no. 4 (July 16, 2018): 79. http://dx.doi.org/10.22159/ijcpr.2018v10i4.28474.

Full text

Abstract:

Objective: The present work focus in the direction of “Development and evaluation of Ciprofloxacin Hydrochloride loaded ocular insert by using “plantago ovata” as natural polymer”. The current work was carried out to evaluate the control release profile of ocular insert. Natural polymer in ocular insert was used for studying the long acting property. Natural polymer is also used to enhance the bioavailability of drug and reduce toxicity. It is also used to increase the duration of action of drug for prolongs action and gives better in vitro performance as compare than to the conventional ocular formulation.Methods: Solvent casting method was used in the formulation of Ciprofloxacin Hydrochloride loaded ocular inserts. Different ocular insert formulations of varying polymer concentration were prepared. Ocular insert formulation H-1 to H-3 was prepared by using different concentration of HPMC and formulation P-1 to P-4 was prepared by using different concentration of Plantago Ovata.Results: The ocular inserts formulation was within the acceptable limits. All the pre formulation parameters of polymers such as derived properties, compressibility index, Hausner’s ratio, viscosity, melting point, swelling ratio, loss on drying, PH of mucilage solution and pre formulation of active pharmaceutical ingredient such as estimation of drug by using UV spectroscopy, determination of melting point, solubility, partition coefficient and FTIR for compatibility study of drug and excipient were evaluation. FTIR analysis also confirmed no drug-excipient interaction.Conclusion: Prepared inserts in the present study were semitransparent. The mixing of the drug in to the polymer is uniform, due to this; the drug content of all formulation is good. Formulation P4 was selected because it showed better release profile, drug content and other physicochemical properties than other formulated batch when compare. All the prepared inserts showed in vitro drug release for the period of 4 h as compare to the marketed formulation. An in vitro drug release study revealed that ocular formulation gives a prolong action. The formulation was found to be long acting.

APA, Harvard, Vancouver, ISO, and other styles

8

Gronostajski, Z., M. Hawryluk, M. Kaszuba, P. Widomski, J. Ziemba, and J. Smolik. "The Use of 3D Scanning Methods to Evaluate the Hybrid Layer Used in Forging Tools in Order to Improve their Durability." Archives of Metallurgy and Materials 62, no. 3 (September 26, 2017): 1549–58. http://dx.doi.org/10.1515/amm-2017-0238.

Full text

Abstract:

AbstractThis study is focused on tools used in the industrial process of hot forging of a front wheel forging (gear wheel) manufactured for the automotive industry. Five different variants were applied for the tools: 3 die inserts were coated with three different hybrid layers (PN + PVD type), i.e. AlCrTiN, AlCrTiSiN and CrN, one insert was only nitrided, and one was pad welded, to improve tool durability. The tool wear was analysed and represented by the material degradation on the working surface, based on the 3D scanning and the material growth of the periodically collected forgings. Additionally, the scanned tools were divided into two areas, in which it was found, based on the analysis, that various degradation mechanisms are predominant. Microstructural tests and hardness measurements of the analyzed tools were also performed. Based on the results, it was found that, in the central part of the die insert, thermo-mechanical fatigue, abrasive wear and plastic deformation occurred, while in the area of the bridge insert, only abrasive wear could be observed. For these areas, the loss of material was determined separately. It was established that the use of the GN+CrN and GN+AlCrTiN hybrid layers on forging tools improves their durability, while the best results in the central area were observed on the tool with the GN+CrN layer, which is the most resistant to thermo-mechanical fatigue. In the second analyzed area, good wear resistance occurred on GN+CrN, GN+AlCrTiN and pad welded inserts, for which, together with the increase of the forging number, a proportional, slight growth of the loss of material occurred.

APA, Harvard, Vancouver, ISO, and other styles

9

Neidel, A., S. Riesenbeck, and T. Gädicke. "Component Loss due to the Fracture of an Indexable Insert." Practical Metallography 57, no. 7 (July 15, 2020): 502–7. http://dx.doi.org/10.3139/147.110646.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Lu, Xue Song, Qi Li, and Juan Liu. "Research on the Acoustic Insert Loss in Water Filled Pipes." Applied Mechanics and Materials 668-669 (October 2014): 310–13. http://dx.doi.org/10.4028/www.scientific.net/amm.668-669.310.

Full text

Abstract:

Water filled pipe as an experimental model of the sea pipeline on ships, the study has very important significance of the sound propagation characteristics. In this paper, eigenfunctions of pipeline interior sound field are theoretically calculated at first. And through the Matlab software simulation calculation, the cutoff frequency is shown. And then, the water filled pipe acoustic insertion loss is given by the experimental study. Through the research, we validate the cutoff frequency calculation, and gives the insertion loss of pipelines.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Insert loss"

1

Cheatham, Christopher. "Statistical analysis of fastener vibration life tests." [Tampa, Fla.] : University of South Florida, 2007. http://purl.fcla.edu/usf/dc/et/SFE0002275.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Podstata, Jan. "Volba optimálního nástroje pro vybranou technologii obrábění." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-432700.

Full text

Abstract:

This thesis compares the properties of four types of replaceable cutting tool inserts from different suppliers during milling. The comparative factors are cutting force, material loss of the insert and the roughness of the resulting surface. The thesis is divided into two parts - a comprehensive overview of the current state of knowledge and an experiment. The first part analyzes the load, the possibility of its measurement, surface treatment of tools, milling cutters and replaceable inserts. The experiment took the form of measuring the load during face milling, measuring the surface roughness of the machined material and measuring the material loss of the inserts on an optical strain gauge. The replaceable cutting tool inserts were compared based on the performed measurements.

APA, Harvard, Vancouver, ISO, and other styles

3

Beneš, Pavel. "Měření základních parametrů optických a optoelektronických komponent." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442446.

Full text

Abstract:

This diploma thesis deals with optical and optoelecronic components. The first part of the work describes the optical paths and methods of their measurement. The second part describes the coupler, circulator and isolator. Further described is a laser diode, a photodetector and a modulator. The third part describes the measurement procedure of the coupler, circulator, isolator, laser diode, photodetector and modulator. The measured values are compared with the catalog values.

APA, Harvard, Vancouver, ISO, and other styles

4

Hedges, S. J. "The analysis of inset dielectric guide by transverse resonance diffraction." Thesis, University of Bath, 1987. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378882.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Neves, Ademir Diniz. "Bioecologia e tabela de vida de fertilidade de Praelongorthezia praelonga (Douglas, 1891) (Hemiptera: Ortheziidae) em diferentes temperaturas e UR." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-13022014-083216/.

Full text

Abstract:

O objetivo deste trabalho foi avaliar o desenvolvimento de Praelongorthezia praelonga (Douglas, 1891) em diferentes temperaturas e umidades relativas do ar, para definir áreas, no Estado de São Paulo, nas quais esta praga tenha maior possibilidade de aumentar o seu nível populacional, e, consequentemente causar maiores prejuízos. Neste sentido, a partir de criação estoque em cróton (Codeaum variegatum L.), cochonilhas recém nascidas foram transferidas para mudas de limoeiro Cravo (Citrus limonia L.) onde foram observados diversos parâmetros biológicos. Procedeu-se de forma análoga para avaliação dos parâmetros biológicos desta praga nas diferentes umidades relativas do ar, utilizando-se neste caso, como hospedeiro, tubérculos brotados de batata (Solanum tuberosum). Concluiu-se que as melhores temperaturas com base taxas liquidas de reprodução (R0) e razão finita de aumento (?), para o desenvolvimento de P. praelonga foram 22 e 25°C; a melhor umidade relativa do ar com base nas maiores taxa liquida de reprodução (R0) e razão finita de aumento (?) para P. praelonga foi 70%; a fase crítica, em qualquer condição térmica ou hídrica, para a criação de P. praelonga foi o primeiro ínstar para fêmeas, e o primeiro ínstar e a pseudo-ninfose para machos; em função das exigências térmicas, P. praelonga pode apresentar de 4,99 a 6,60 gerações anuais, nas principais áreas citrícolas de São Paulo; adultos e ninfas de P. praelonga preferiram as folhas maduras da região mediana da copa para escolha; a amostragem de P. praelonga deve ser feita com maior periodicidade nos períodos secos e frios do ano e em folhas da porção mediana das copas.
The goal of this research was to evaluate the development of Praelongorthezia praeloga (Douglas, 1891) under different temperatures and relative humidity in order to define areas in the state of Sao Paulo where this pest is more likely to increase its population level thus causing higher losses. Through stock rearing of garden crotons (Codeaum variegatum L.), recently born mealybugs were transferred to \'Rangpur\' lime seedlings (Citrus limonia L.) and several biological parameters were observed. Similarly the evaluation of the biological parameters of the pest was performed under different relative humidity having, in this case, sprouting potato (Solanum tuberosum) tubers as host. The best temperatures based on net reproduction rates (R0) and finite ratio of increase (?) for the development of P. praelonga were 22 and 25°C; the best relative humidity based on the highest net reproduction rates (R0) and finite ratio of increase (?) for P. praelonga was 70%; the critical stage, under any thermal or moist condition, for P. praelonga rearing was the first instar for females and first instar and pseudo-nymphosis for males; regarding the thermal requirements, P. praelonga may reach 4.99 to 6.60 annual generations in the main citrus areas of Sao Paulo; P. praelonga adults and nymphs preferred mature leaves of the trees for fixation; the P. praelonga sampling must be carried out with higher periodicity in dry and cold periods of the year and in leaves of the central part of the tree.

APA, Harvard, Vancouver, ISO, and other styles

6

Spring, MaLisa R. "Impacts of Urban Greenspace Management on Beneficial Insect Communities." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492682461719594.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Ritchie, John Murray. "Pressure loss and heat transfer for single-phase turbulent flow in tubes fitted with wire-matrix inserts." Thesis, University of Birmingham, 2009. http://etheses.bham.ac.uk//id/eprint/1228/.

Full text

Abstract:

Heat transfer enhancement devices have become widely accepted as a method of enhancing exchanger performance and changing duties to either improve output or meet new operating requirements. hiTRAN® wire matrix inserts consist of a number of loops wound around a central core consisting of two intertwined wires. These inserts see a number of applications inside industrial tubular heat exchangers. They work by removing the laminar boundary layer that is often a dominant resistance to heat transfer, and mixing it with the core flow. This thesis presents research undertaken into the performance characteristics of hiTRAN® inserts in single-phase turbulent flow. Cal Gavin Limited, the company that manufactures these inserts, identified a need for reliable heat transfer and friction factor data within the turbulent flow regime. In order to meet this need, a test rig was commissioned in the form of a double-pipe heat exchanger. This exchanger was used in order to obtain performance data for a wide range of the sponsoring company’s most common insert geometries, placed inside a number of tubes, with diameters ranging from 10 mm to 13/8 inch. The heat transfer and pressure drop data obtained from the test rig were analysed and empirical correlations drawn to describe performance for varying loop densities for each tube and insert geometry. These data were further analysed against the existing semi-empirical theory concerning the use of roughness and geometry parameters to describe friction factor and heat transfer in systematically-roughened channels. The current research has shown that the friction factor correlations may be adapted to incorporate a logarithmic relationship on the ratio of hydraulic diameter to coil pitch, in order to effectively determine the friction factor of hiTRAN® inserts for which this ratio is between 1 and 8. This represents the range of inserts for which the sponsoring company are regularly required to provide thermal designs. The heat transfer performance is shown to be effectively described by the existing analogy between friction factor and heat transfer, as applied to systematically-roughened channels. This thesis also proposes a number of positive commercial implications of the determination of these correlations for the sponsoring company. As well as giving a number of accurate empirical relationships and presenting a semiempirical correlation for the description of performance of hiTRAN® inserts, this work also investigates the effect of a number of geometrical parameters upon insert performance. These qualitative analyses provide an indication of how the optimum coil diameter varies with loop density for a given insert geometry, as well as considering the effect of both the number of turns applied in intertwining the core wire during fabrication, and of the strength of fit that the insert makes with the tube wall. A constant pumping power comparison is also presented, which considers the ratio of heat transfer for the enhanced tube to the heat transfer that would have resulted from the fluid being pumped with the same power through a plain empty tube. This analysis indicates the presence of an optimum pitch to coil wire thickness ratio, the presence of which is substantiated by consideration of the laminar boundary layer behaviour around hiTRAN® inserts. Finally, suggestions are made for how these qualitative analyses may be developed by future experimentation into determining an optimised insert, along with other proposals for further work on the test rig.

APA, Harvard, Vancouver, ISO, and other styles

8

Kolomenskiy, Dmitry. "Numerical modelling of lows past moving obstacles : Application to the aerodynamics of insect flight." Aix-Marseille 1, 2010. http://www.theses.fr/2001AIX11034.

Full text

Abstract:

Cette thèse présente une étude théorique et numérique des écoulements non-stationnaires autour des ailes battantes des insectes. Une méthode numérique est développée pour modéliser des écoulements visqueux incompressibles autour d’obstacles mobiles. La condition de non-glissement sur les parois est imposée par la méthode de pénalisation. Le problème est discrétisé par une méthode pseudo-spectrale Fourier. Une approche originale est proposée pour l’interpolation de l’interface entre le fluide et le solide, basée sur la discrétisation spectrale. Le code de calcul est adapté aux architectures massivement parallèles. La méthode développée est utilisée pour examiner le mécanisme de Lighthill–Weis-Fogh, un mouvement qui permet d’augmenter la portance engendrée au début de chaque cycle de battement d’ailes. Cependant, cette étude commence par un développement non-visqueux. On s’intéresse particulièrement au changement topologique du domaine fluide, au moment où les ailes se touchent et puis se séparent. Le scénario bidimensionnel non-visqueux proposé par Lighthill est confirmé par un calcul directe, qui montre une possibilité d’engendrer un mouvement circulatoire dans un fluide non-visqueux. Ensuite, les effets visqueux sont considérés. Notamment, on établit que les contraintes visqueuses contrôlent l’établissement de l’écoulement dans l’espace entre les deux ailes après leur séparation. Au voisinage des bords de fuite le nombre de Reynolds est localement très faible, et l’écoulement est bien décrit par des solutions auto-similaires de l’équation de Stokes. Ensuite, des effets tridimensionnels sont considérés. Les simulations numériques sont effectuées avec deux valeurs du nombre de Reynolds, 128 et 1400, typique pour des différentes tailles des insectes. Au début d’un cycle de battement, l’approximation bidimensionnelle est justifiée ; peu de temps après, le caractère tridimensionnel de l’écoulement commence à jouer un rôle important en faisant retarder le décrochage des tourbillons. Enfin, quelques résultats sur le couplage du mouvement du fluide et du solide sont présentés. On considère la chute libre des plaques sous la force de gravite. Les simulations numérique à Re = 10, 100 et 1000 montre l’effet stabilisant de la viscosité
The dissertation presents theoretical and numerical studies of unsteady flows relevant to insect flapping flight. Much emphasis is put on the development of a numerical method for modelling incompressible viscous flows past multiple moving solid obstacles. The Navier–Stokes equations are solved using a Fourier pseudo-spectral discretization. Solid obstacles are modelled with the volume penalization method. An original approach is proposed for interpolation of the time-dependent penalization mask function, which takes advantage of the spectral discretization. Both two- and three-dimensional solvers have been developed, which differ in some implementation aspects. Notably, the three-dimensional code is adapted for massively parallel computers. The newly-developed numerical method is employed in a study of the Lighthill–Weis- Fogh mechanism, an unsteady aerodynamic mechanism used by some insects. That study begins, however, with the inviscid fluid model first considered by Lighthill. A transition from fling to sweep is analysed, when the connectivity of the domain changes. Then, modifications due to viscosity are explored. Important viscous effects are found near the trailing edges. The flow field near the hinge, observed in numerical simulations, is explained theoretically by local analysis of the Stokes equation. The importance of the three-dimensional effects is assessed. Numerical simulations are performed at two different values of the Reynolds number, Re = 128 and 1400, typical for insects of different size. The flow during fling is shown to be in reasonable agreement with the two-dimensional approximation. After the wings move apart, three-dimensional effects become essential. The penalization model has been extended to solve the problem of solid bodies falling through a fluid. Numerical simulations at Re = 10, 100 and 1000 have shown that decreasing Re has a stabilizing effect on the free fall dynamics

APA, Harvard, Vancouver, ISO, and other styles

9

Peris, Cerdán David. "Paleobiología de los escarabajos (Insecta: Coleoptera) de los ámbares cretácicos del oeste europeo." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/396602.

Full text

Abstract:

Los coleópteros son en la actualidad el grupo biológico con mayor biodiversidad de la Tierra. Se conocen coleópteros fósiles desde el Pérmico, pero conservados en ámbar solo desde el Cretácico inferior. Este tipo de fosilización, en contraste con otros, permite realizar estudios anatómicos y evolutivos muy detallados. Son pocas las áreas del mundo donde existen yacimientos de ámbar mesozoico con abundantes bioinclusiones. Entre ellas, los yacimientos de España (Albiense) y Francia (Albiense–Santoniense) destacan por ser los más antiguos con alta paleobiodiversidad por detrás del Líbano (Barremiense). Se ha realizado por primera vez el estudio de la asociación de coleópteros de los ámbares cretácicos del oeste europeo, la cual cuenta con 214 ejemplares (149 en España y 65 en Francia). Se han identificado 41 familias diferentes, 30 en España y 16 en Francia. El estudio muestra que 13 de las familias identificadas cuentan en estos ámbares con sus representantes más antiguos conocidos; en algunos casos son los únicos registros para todo el Mesozoico o incluso de todo el registro fósil conocido. La mayoría de familias identificadas mantienen en la actualidad un estilo de vida saproxílico. Por lo tanto, este grupo no pudo influir en la liberación de grandes cantidades de resina en los bosques de gimnospermas del Cretácico, tal como se había defendido hasta el momento. Esta liberación tubo que estar influenciada por otras causas, como paleoincendios; la presencia de cenizas dentro del ámbar y en el sedimento, así como de restos vegetales fusinizados asociados al ámbar, demuestran que el medio forestal estaba afectado por incendios recurrentes. Del total de familias identificadas en España y en Francia, solo cinco están presentes en ambas áreas. Este hecho resulta sorprendente atendiendo a la cercanía tanto paleogeográfica como temporal entre dichas áreas. El aislamiento paleogeográfico de la placa ibérica durante gran parte del Mesozoico, lo cual pudo favorecer una elevada tasa de endemismos, algún sesgo tafonómico o de muestreo y/o características paleobotánicas o paleoambientales que pudieron ser diferentes a nivel regional, son diferentes ideas que se describen como explicación para este fenómeno. Algunas de las familias de coleópteros identificadas en estos ámbares pueden actuar como polinizadores de flores en la actualidad. El estudio de estos grupos de coleópteros está ayudando a desentrañar cuestiones de gran importancia sobre el origen y diversificación de las plantas con flor.
Beetles are currently the greatest biological group on Earth. Fossil beetles are known from the Permian, but preserved in amber only from the Cretaceous. This type of fossilization, in contrast to other ones, allows detailed anatomical and evolutionary studies. There are few areas in the world where there are Mesozoic deposits of amber with abundant bioinclusiones. Deposits of Spain (Albian) and France (Albian-Santonian) stand out as being the oldest with high palaeobiodiversity embedded within behind deposits from Lebanon (Barremian). The association of beetles in the Cretaceous amber of Western Europe (Spain and France) has been performed for the first time, which has 214 specimens (149 in Spain and 65 in France). In the end, 41 different families, 30 in Spain and 16 in France, were identified. The study shows that 13 families have in these ambers their oldest known representatives; in some cases they are the only records for the entire Mesozoic or even the entire fossil record. Most families identified maintain currently a saproxylic life style. Therefore, this group could not influence the release of large amounts of resin in the Cretaceous forests of gymnosperms, as had been defended so far. This release was influenced by other causes, such wildfires; the presence of ash within the amber and sediments, as well as fusinized plant remains associated with amber, show that the forest environment was affected by recurrent fires. Of all families identified in Spain and France, only five of them are present in both areas. This is surprising taking into account the proximity both paleogeographic and temporary between these areas. The paleogeographic isolation of the iberian plate during much part of the Mesozoic, which could favoured a high rate of endemism, some taphonomic or sampling bias and / or paleobotanical or paleoenvironmental characteristics that might be different at regional level, are different ideas described as an explanation for this phenomenon. Some of the families of beetles identified in these ambers can act today as pollinators of flowers. The study of these groups of beetles may help to understand the origin and diversification of flowering plants.

APA, Harvard, Vancouver, ISO, and other styles

10

Goula, Marta. "Contribución al estudio de los hemípteros (Insecta, Heteroptera, Familia Miridae)." Doctoral thesis, Universitat de Barcelona, 1986. http://hdl.handle.net/10803/826.

Full text

Abstract:

La presente tesis realiza un estudio en profundidad de la familia Miridae (Insecta, Heteroptera) de las zonas del Montseny, Montserrat y Garraf (Cataluña). Este estudio incluye aspectos morfológicos, biométricos, sistemáticos, faunísticos, biogeográficos y ecológicos. La tesis incluye el catálogo exhaustivo de los "Miridae" de Cataluña, describiendo un total de 120 especies, una de las cuales es nueva para la ciencia.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "Insert loss"

1

1962-, Fleenor Scott B., ed. Insects of the Texas lost pines. College Station: Texas A & M University Press, 2003.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Nevill, Ralph John Leslie. Potential loss due to decay and insect attack following selective harvest in coastal montane forests. Victoria, B.C: Canadian Forest Service, 1996.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

3

Jan, Gerardi, ed. Andrew lost with the bats. New York: Random House, 2006.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

4

Inc, DK Publishing, ed. The really hairy scary spider and other creatures with lots of legs. New York, NY: DK Pub., 1996.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

5

Greenaway, Theresa. The really hairy scary spider and other creatures with lots of legs. London: Dorling Kindersley, 1996.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

6

Bagnoli, Luca, ed. La lettura dei bilanci delle Organizzazioni di Volontariato toscane nel biennio 2004-2005. Florence: Firenze University Press, 2007. http://dx.doi.org/10.36253/978-88-8453-640-2.

Full text

Abstract:

This study, emerging from workshop activity carried out as part of the course on ECONOMY AND ADMINISTRATION OF CO-OPERATION AND NON-PROFIT, represents an examination of the economic-financial dimension of the work of the Tuscan voluntary organisations. It is inserted within an articulated research process devoted to an analysis of the accountability of these third sector agents, in the awareness that voluntary work has always been an important factor in civil progress. More specifically, the economic and financial information made available to the provinces as a result of the obligation on the voluntary organisations to deposit the annual financial statement has been fully exploited. This compliance has thus been transformed from a mere bureaucratic procedure into an opportunity for a collective cognitive enrichment through collection at regional level, reclassification and the aggregate analysis of the economic and financial data relating to the management reports (profit and loss accounts) of the voluntary organisations for 2004-2005. This has made it possible to underscore the nature and provenance of the economic and financial resources that accrue annually to such bodies, as well as the principal productive factors "consumed" in the performance of their activities.

APA, Harvard, Vancouver, ISO, and other styles

7

García-Castro, Juan Fernando. Lectura crítica para la construcción del mundo. Editorial Universidad Pontificia Bolivariana, 2021. http://dx.doi.org/10.18566/978-958-764-935-2.

Full text

Abstract:

El tercer número de la colección Lingua Nostra: conocimientos y posibilidades del español ofrece una aproximación alterna de la lectura crítica desde diversas perspectivas que contemplan las dimensiones pedagógica, literaria y normativa. La primera parte del texto presenta la lectura crítica desde la mirada de lo sociocultural. Esto significa una conceptualización de la lectura como una práctica que se inserta en las dinámicas sociales en las que se insertan los sujetos que leen. En esta conceptualización se ofrece una categorización de los niveles de la lectura según una tradición lingüística y sociocultural; asimismo, se presenta un acercamiento a las tipologías textuales como un dato relevante para el ejercicio de acceder al texto en términos hermenéuticos.

APA, Harvard, Vancouver, ISO, and other styles

8

Taber, Stephen Welton. Insects of the Texas Lost Pines. Texas A&M University Press, 2003.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

9

Moten, James M., and C. W. Copeland. Insurance and Risk Management. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780190269999.003.0017.

Full text

Abstract:

According to modern portfolio theory (MPT), rational market participants make most decisions and seek to be compensated for additional risk. However, investors sometimes behave irrationally owing to preconceived notions and biases based on past experience. Behavioral finance offers an alternative view to MPT, suggesting that individuals often make irrational decisions. This chapter explores how individuals make decisions to buy different types of insurance, even when faced with predicable outcomes involving the frequency and severity of the loss. That is, individuals appear to buy insurance only when the frequency of loss is low and the severity of loss is high; otherwise they self-insure.

APA, Harvard, Vancouver, ISO, and other styles

10

Lost - A Wild Tale of Survival. Capstone, 2016.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

More sources

Book chapters on the topic "Insert loss"

1

Neidel, A., S. Riesenbeck, T. Gädicke, and V. Müller. "Component Loss due to the Fracture of an Indexable Insert | Bauteilverlust durch Wendeschneidplattenbruch." In Schadensfallanalysen metallischer Bauteile 2, 131–36. 2nd ed. München: Carl Hanser Verlag GmbH & Co. KG, 2021. http://dx.doi.org/10.3139/9783446470538.013.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Dent, David, and Richard H. Binks. "Yield loss." In Insect pest management, 39–66. Wallingford: CABI, 2020. http://dx.doi.org/10.1079/9781789241051.0039.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Scali, Valerio. "Metasexual Stick Insects: Model Pathways to Losing Sex and Bringing It Back." In Lost Sex, 317–45. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2770-2_16.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Manning, William J., and Kevin D. Keane. "Effects of Air Pollutants on Interactions Between Plants, Insects, and Pathogens." In Assessment of Crop Loss From Air Pollutants, 365–86. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-1367-7_16.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Litsinger, James A. "When Is a Rice Insect a Pest: Yield Loss and the Green Revolution." In Integrated Pest Management: Innovation-Development Process, 391–498. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-1-4020-8992-3_16.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Manosathiyadevan, Manoharan, V. Bhuvaneshwari, and R. Latha. "Impact of Insects and Pests in loss of Crop Production: A Review." In Sustainable Agriculture towards Food Security, 57–67. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6647-4_4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Wagner, Michael R., Stephen K. N. Atuahene, and Joseph R. Cobbinah. "Pests of logs, lumber and forest products." In Forest entomology in West Tropical Africa: Forest insects of Ghana, 103–51. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-015-7936-0_6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Gottschalk, K. "Vignette: Habitat Loss and Near Extinction of Plants and Insects in South Africa." In From Polarisation to Multispecies Relationships, 115–18. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6884-2_7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Bowker, Lesley K., James D. Price, and Sarah C. Smith. "Gastroenterology." In Oxford Handbook of Geriatric Medicine, 351–82. Oxford University Press, 2012. http://dx.doi.org/10.1093/med/9780199586097.003.0012.

Full text

Abstract:

The ageing gastrointestinal system 352 The elderly mouth 354 Nutrition 356 HOW TO . . . Manage weight loss in older patients 357 Enteral feeding 358 HOW TO . . . Insert a fine-bore NG feeding tube 359 The ethics of clinically assisted feeding 360 Oesophageal disease 362 Dysphagia 364 Peptic ulcer disease ...

APA, Harvard, Vancouver, ISO, and other styles

10

D'Agostino, Susan. "Keep it simple whenever possible, since 0.999…=1." In How to Free Your Inner Mathematician, 151–52. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198843597.003.0026.

Full text

Abstract:

“Keep it simple whenever possible, since 0.999…=1” presents and discusses a very short mathematical proof demonstrating the long-known result that 0.999…=1. The ellipsis in the number 0.999… indicates that this number repeats in an infinite decimal expansion. As such, this number is unwieldy to lug around, insert into equations, and even describe. However, the number 1 is not simply a good approximation for 0.999…., but rather the number 1 may be used in place of 0.999… without loss of information. Mathematics students and enthusiasts are encouraged to keep their mathematical and life pursuits simple whenever possible. At the chapter’s end, readers may check their understanding by working on a problem. A solution is provided.

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Insert loss"

1

Zhang, Chuxian, Qunfeng Chang, Hong Liu, Qian Yu, and Libing Cai. "Terahertz Gapless Low Insert Loss Waveguide Switch Technology." In 2018 48th European Microwave Conference (EuMC). IEEE, 2018. http://dx.doi.org/10.23919/eumc.2018.8541423.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Ozarde, Amit Prakash, and Gene McNay. "Thermo-Mechanical Fatigue and Press-Fit Loss Analysis of Valve Seat Insert." In Symposium on International Automotive Technology. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2021. http://dx.doi.org/10.4271/2021-26-0338.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Andersson, R., and A. Reinap. "Loss mapping of an Insert Permanent Magnets Synchronous Machine for parallel hybrid electric heavy vehicles." In 2016 XXII International Conference on Electrical Machines (ICEM). IEEE, 2016. http://dx.doi.org/10.1109/icelmach.2016.7732775.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Nandikolla, Vidya K., Marco P. Schoen, and Ajay Mahajan. "Active Foot Pressure Control for Diabetic Patients." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59549.

Full text

Abstract:

Foot Ulcer in diabetic patients is a serious medical problem. A major contributor for the development of diabetic foot ulcers is a high, localized plantar foot pressure. It is believed that in diabetes the nerves in the extreme parts of the human body are damaged and cause deregulated blood flow, which may cause an insufficient blood supply. This can lead to a loss of feeling, change in shape of the feet, necrosis and ulcerations, and ultimately to partial or total amputation of the body part. The loss of feeling in the feet results in a loss of feedback to control the foot pressure distribution. It is proposed that high foot pressure concentration can be avoided by using an active, intelligent shoe insert, which is based on the mechanics of smart materials. This paper investigates the controls schemes necessary to accomplish an external foot pressure distribution scheme for preventing ulcerations or the progression of existing ulcers. A simple mathematical model of the shoe insert is developed. Foot pressure distributions for healthy subjects are used as a basis to control elevated foot pressures by changing the shape of the shoe insert. The optimal shape of the shoe insert with regard to the existing pressure distribution is computed. The optimal shape is implemented using different control schemes. The performance and the efficiency of the proposed control schemes are compared and analyzed. The main advantage of the proposed active shoe insert is its capability to sense the pressure peaks, change the pressure distribution, and provide stimuli for increased blood flow in the diabetic feet. [1,2,3]

APA, Harvard, Vancouver, ISO, and other styles

5

Subbuswamy, Ganesh, and Xianchang Li. "Simulation of Fluid Flow and Heat Transfer of Flat Plate Heat Sinks With Spiral Inserts." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22898.

Full text

Abstract:

High performance electronic chips are finding applications in almost all equipments in the modern world. However, these chips are coupled with potential overheating, which has been a serious concern for manufacturers as well as researchers ever. One of the best options for electronics cooling is to take advantage of heat sinks. Over years, many studies are focused on optimal designs of heat sinks, while some are also targeted at heat transfer enhancement. To explore how the heat sink performance can be further improved, this study integrates spiral tape inserts into the narrow channel of plate-finned heat sinks. Numerical simulation is carried out to examine the flow and heat transfer behavior of heat sinks with spiral inserts. Different parameters such as insert width, twist ratio, and the flow Reynolds number are investigated. It is observed that the inserts significantly increase the heat transfer rate with a penalty of higher pressure loss. In one of the cases studied, the heat transfer is increased by 368% with a rise of 810% in pressure drop. However, the inserts can produce a net benefit when the same pressure loss or fan power is considered. Therefore, the inserts can help make the heat sink more effective by reducing its size.

APA, Harvard, Vancouver, ISO, and other styles

6

Wang, Lei, Jian Hua Liu, Hui Wang, Chen Chen Gou, and Jian Bo Zhou. "Effect of LTS background coil size on the AC loss generated in the REBCO HTS insert magnet." In 2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD). IEEE, 2015. http://dx.doi.org/10.1109/asemd.2015.7453671.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Turgut, Özhan H., and Cengiz Camcı. "Experimental Investigation and Computational Evaluation of Contoured Endwall and Leading Edge Fillet Configurations in a Turbine NGV." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69304.

Full text

Abstract:

Secondary flow minimization is a crucial problem in a turbine passage. In the present paper, three different ways are employed to reduce the secondary flow related total pressure loss. These are nonaxisymmetric endwall contouring, leading edge (LE) fillet, and the combination of these two approaches. Experimental investigation and computational assessment are applied for the performance calculations. The experiments are carried out in an annular Axial Flow Turbine Research Facility (AFTRF) having a diameter of 91.66cm. For the experimental measurement comparison, a reference Flat Insert is installed in the nozzle guide vane (NGV) passage. It has a constant thickness with cylindrical surface and is manufactured by stereolithography (SLA) method. Also, Flat Insert has a backward facing step at the NGV exit, and the effect of this step is analyzed computationally. Four different LE fillets are designed, and they are attached to both cylindrical Flat Insert and the contoured endwall. Total pressure measurements are taken at rotor inlet plane with Kiel probe. The probe traversing is completed with one vane pitch and from 8% to 38% span. For one of the designs, area-averaged loss is reduced by 15.06%. The simulation estimated this reduction as 6.95%. Computational evaluation is also performed at the NGV exit plane. The most effective design reduced the mass-averaged loss by 1.84% on the whole passage. The computational study did not include the rim seal flow between the vane and rotor domain and also rotor simulation was absent. The difference between the measurements and the simulation comes from these two important effects.

APA, Harvard, Vancouver, ISO, and other styles

8

Turgut, Özhan H., and Cengiz Camcı. "Influence of Leading Edge Fillet and Nonaxisymmetric Contoured Endwall on Turbine NGV Exit Flow Structure and Interactions With the Rim Seal Flow." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-95843.

Full text

Abstract:

Three different ways are employed in the present paper to reduce the secondary flow related total pressure loss. These are nonaxisymmetric endwall contouring, leading edge (LE) fillet, and the combination of these two approaches. Experimental investigation and computational simulations are applied for the performance assessments. The experiments are carried out in the Axial Flow Turbine Research Facility (AFTRF) having a diameter of 91.66cm. The NGV exit flow structure was examined under the influence of a 29 bladed high pressure turbine rotor assembly operating at 1300 rpm. For the experimental measurement comparison, a reference Flat Insert endwall is installed in the nozzle guide vane (NGV) passage. It has a constant thickness with a cylindrical surface and is manufactured by a stereolithography (SLA) method. Four different LE fillets are designed, and they are attached to both cylindrical Flat Insert and the contoured endwall. Total pressure measurements are taken at rotor inlet plane with Kiel probe. The probe traversing is completed with one vane pitch and from 8% to 38% span. For one of the designs, area averaged loss is reduced by 15.06%. The simulation estimated this reduction as 7.11%. Computational evaluation is performed with the rotating domain and the rim seal flow between the NGV and the rotor blades. The most effective design reduced the mass averaged loss by 1.28% over the whole passage at the NGV exit.

APA, Harvard, Vancouver, ISO, and other styles

9

Rajala, Andrew G., Dean B. Edwards, and Micheal O’Rourke. "Collaborative Behavior for Vehicle Replacement in AUV Formations." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80081.

Full text

Abstract:

The Navy would like to use platoons of cooperating Autonomous Underwater Vehicles (AUVs) for large area underwater mine countermeasures (MCM). Collaborative behavior requires a common language, control structure, and logic so the AUVs can coordinate their action through communication. The loss of an AUV (can no longer perform assigned tasks) is a problem the formation is likely to face. The formation must compensate for lost AUVs, or time would be wasted in researching the area. In order to replace a lost AUV, the formation must determine when a vehicle is lost and what to do if a vehicle returns after being declared lost. To address these problems, fuzzy logic was used to determine when an AUV should be replaced, and a logic structure was developed to insert returning AUVs. Computer simulations showed that the logics increased the defined performance index by about 70% over the baseline case.

APA, Harvard, Vancouver, ISO, and other styles

10

Nandikolla, Vidya K., Marco P. Schoen, and Ajay Mahajan. "Active Foot Pressure Control for Diabetic Neuropathy During Walking." In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-79783.

Full text

Abstract:

Diabetic Mellitus is a disease caused either due to insufficient insulin produced by the pancreas or the body cells are unable to use the existing insulin. One of the main complications associated with diabetics is neuropathy, which is caused due to complete or partial loss of sensation in the feet and legs that lead to problems like inadequate delivery of nutrients and oxygen to the foot, which will cause healing impairment. In diabetic neuropathic subject, the hardness of foot sole soft tissue gives rise to plantar ulcer development. In this work, a biomechanical model is used to study the plantar distribution of forces in the foot. The dynamic foot pressure distribution during walking is used to carry out a stress analysis. This includes the motion of heel strike, mid-stance, and push off section of the feet during walking. A control strategy is proposed to mitigate the high stress concentration occurring during the walking phase. The control strategy includes a synergy of an adaptive neuro-fuzzy inference controller and for comparison an optimal controller. The actuation is simulated through an external shoe insert. The three-dimensional multi-segment biomechanical model is used in conjunction with experimental data gathered from various literatures for simulation purposes of the proposed control strategy. The proposed intelligent controller focuses on stresses generated by the foot pressure distribution during walking and compares these with stress levels of healthy subjects. The insert changes its shape accordingly to redistribute the pressure levels at various regions so to achieve a pressure distribution equivalent to a healthy subject. It is assumed that the insert can actuate and measure the pressure distribution simultaneously. This could be achieved using smart materials for the shoe insert. The simulation results show the effectiveness of the proposed algorithms and approach.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!