Relevant bibliographies by topics / Saddle

Academic literature on the topic 'Saddle'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Saddle"

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MacKechnie-Guire, Russell, Erik MacKechnie-Guire, Vanessa Fairfax, Diana Fisher, Mark Fisher, and Thilo Pfau. "The Effect of Tree Width on Thoracolumbar and Limb Kinematics, Saddle Pressure Distribution, and Thoracolumbar Dimensions in Sports Horses in Trot and Canter." Animals 9, no. 10 (October 21, 2019): 842. http://dx.doi.org/10.3390/ani9100842.

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This study evaluated the effect of saddle tree width on thoracolumbar and limb kinematics, saddle pressure distribution, and thoracolumbar epaxial musculature dimensions. Correctly fitted saddles were fitted by a Society of Master Saddler Qualified Saddle Fitter in fourteen sports horses (mean ± SD age 12 ± 8.77 years, height 1.65 ± 0.94 m), and were altered to one width fitting wider and narrower. Horses were equipped with skin markers, inertial measurement units, and a pressure mat beneath the saddle. Differences in saddle pressure distribution, as well as limb and thoracolumbosacral kinematics between saddle widths were investigated using a general linear model with Bonferroni adjusted alpha (p ≤ 0.05). Compared with the correct saddle width, in trot, in the wide saddle, an 8.5% increase in peak pressures was found in the cranial region of the saddle (p = 0.003), a 14% reduction in thoracolumbar dimensions at T13 (p = 0.02), and a 6% decrease in the T13 range of motion in the mediolateral direction (p = 0.02). In the narrow saddle, a 14% increase in peak pressures was found in the caudal region of the saddle (p = 0.01), an 8% decrease in the range of motion of T13 in the mediolateral direction (p = 0.004), and a 6% decrease in the vertical direction (p = 0.004) of T13. Compared with the correct saddle width, in canter, in the wide saddle, axial rotation decreased by 1% at T5 (p = 0.03) with an 5% increase at T13 (p = 0.04) and a 5% increase at L3 (p = 0.03). Peak pressures increased by 4% (p = 0.002) in the cranial region of the wide saddle. Altering the saddle fit had an effect on thoracolumbar kinematics and saddle pressure distribution; hence, correct saddle fit is essential to provide unhindered locomotion.
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Tooth, A. S., J. S. T. Cheung, L. S. Ong, H. W. Ng, and C. Nadarajah. "The Support of Horizontal Vessels Containing High-Temperature Fluids—A Design Study." Journal of Pressure Vessel Technology 120, no. 3 (August 1, 1998): 232–37. http://dx.doi.org/10.1115/1.2842051.

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This paper investigates the behavior of horizontal cylindrical vessels, subjected to thermal loading by high-temperature fluid, where the saddles are fixed to the supporting structure. In order to determine an optimum saddle design, three widely used saddle configurations, with differing saddle heights and top saddle plate extensions, are explored. Thereafter, one of the saddle designs is selected to illustrate a decoupling procedure, for the radial and axial expansions, whereby design charts are obtained to derive the maximum stress values for a range of vessel geometries. The finite element approach, using linear elastic, small displacement analysis, is used throughout.
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Murray, R. C., R. Mackechnie-Guire, M. Fisher, and V. Fairfax. "Reducing peak pressures under the saddle at thoracic vertebrae 10-13 is associated with alteration in jump kinematics." Comparative Exercise Physiology 14, no. 4 (December 7, 2018): 239–47. http://dx.doi.org/10.3920/cep180021.

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There is little information about horse-saddle interaction at take-off for a fence, although there is potential that this could have an influence on performance. It was hypothesised that (1) maximum peak pressure under the saddle would occur in the phase of maximum thoracolumbar flexion prior to hindlimb take-off; and (2) limb and trunk kinematics at take-off over the fence would be affected by reducing peak pressure at Thoracic vertebrae (T)10-13 at the point in the stride where peak pressures occur. The peak pressures under the usual saddle (Saddle S) and a saddle modified to reduce peak pressures at T10-13 (Saddle F) were measured during approach and take-off over a 1.30 m upright fence in 12 elite jumping horses. The timing of peak pressures was determined by comparison with simultaneous video data. Shoulder, carpal flexion angle and trunk angle to the horizontal at hindlimb take-off, take-off distance from the fence and fetlock height above the fence were determined using high speed motion analysis. Peak pressures under the saddle at T10-13 and kinematic data were compared between Saddles S and F. Maximum peak pressures occurred at forelimb vertical, during hindlimb protraction, consistent with thoracolumbar ventroflexion. Saddle F was associated with significantly lower peak pressures at T10-13, greater shoulder and carpal flexion, a steeper trunk angle, and higher fetlock height above the fence than Saddle S. Forelimb take-off distance from the fence was not different between saddles, but hindlimbs were significantly closer to the fence with Saddle F, indicating potential increase in ventroflexion through the thoracolumbosacral region. These findings suggest that reducing peak pressures under the saddle at T10-13 are associated with altered kinematics during the approach and take-off over a fence, which may have a positive effect on jumping performance.
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Aref’eva, Irina, Mikhail Khramtsov, Maria Tikhanovskaya, and Igor Volovich. "On replica-nondiagonal large N saddles in the SYK model." EPJ Web of Conferences 191 (2018): 06007. http://dx.doi.org/10.1051/epjconf/201819106007.

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We study the saddle points of the SYK model, formulated in terms of the replica bilocal fields, beyond the replica-diagonal assumption. We find a family of replica-nondiagonal saddle points in the IR limit, where the saddle point equations are separable. We use the Parisi ansatz to find the replicanondiagonal solutions and take the replica limit. The free energy on these solutions is computed, and we find that some of the replica-nondiagonal saddles have lower free energy than the replica-diagonal saddle point.
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ROCŞOREANU, CARMEN, NICOLAIE GIURGIŢEANU, and ADELINA GEORGESCU. "CONNECTIONS BETWEEN SADDLES FOR THE FITZHUGH–NAGUMO SYSTEM." International Journal of Bifurcation and Chaos 11, no. 02 (February 2001): 533–40. http://dx.doi.org/10.1142/s0218127401002213.

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By studying the two-dimensional FitzHugh–Nagumo (F–N) dynamical system, points of Bogdanov–Takens bifurcation were detected (Sec. 1). Two of the curves of homoclinic bifurcation emerging from these points intersect each other at a point of double breaking saddle connection bifurcation (Sec. 2). Numerical investigations of the bifurcation curves emerging from this point, in the parameter plane, allowed us to find other types of codimension-one and -two bifurcations concerning the connections between saddles and saddle-nodes, referred to as saddle-node–saddle connection bifurcation and saddle-node–saddle with separatrix connection bifurcation, respectively. The local bifurcation diagrams corresponding to these bifurcations are presented in Sec. 3. An analogy between the bifurcation corresponding to the point of double homoclinic bifurcation and the point of double breaking saddle connection bifurcation is also presented in Sec. 3.
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Kumar, Navin, Surjit Angra, and Vinod Kumar Mittal. "Support Analysis of Horizontal Pressure Vessel Using FEA." Applied Mechanics and Materials 592-594 (July 2014): 1220–24. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.1220.

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Saddles are used to support the horizontal pressure vessels such as boiler drums or tanks. Since saddle is an integral part of the vessel, it should be designed in such a way that it can withstand the pressure vessel load while carrying liquid along with the operating weight. This paper presents the stress analysis of saddle support of a horizontal pressure vessel. A model of horizontal pressure vessel and saddle is created in Ansys software. For the given boundry and loading conditions, stresses induced in the saddle support are analyzed using Ansys software. After analysis it is found that maximum localized stress arises at the saddle to vessel interface near the saddle horn area. The results obtained shows that the saddle support design is safe for the given loading conditions and provides the theoretical basis for furthur optimisation.
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Siqueira, Renata Farinelli de, Beatriz Moreira Andrioli, and Marina Juliani Baumhak. "Evaluation of two models of saddles on the back of Arabian horses through thermography." Brazilian Journal of Veterinary Research and Animal Science 56, no. 4 (January 8, 2020): e159435. http://dx.doi.org/10.11606/issn.1678-4456.bjvras.2019.159435.

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Dorsopathies are common causes of decreased performance in athletic horses of various modalities, and inadequate or poorly adjusted saddles can lead to the onset of injuries and low back pain. The present study, searching to find the most appropriate saddle, evaluated the pressure determined from the panels of two saddle models most commonly used in endurance Arab horse on the thoracolumbar region. For the study, six Arabian geldings were used, weighing 390 ± 4.2 and 2.1 ± age 8 years, conditioned to endurance races, and two saddle models, English and Western. The horses were submitted to the work riding on a sandy lane by the same experienced rider who weighed 76 kg. Thermography was performed before and after each exercise session. The obtained data were analyzed through Student’s paired t-test at 5% of significance. After exercise, there was a mean temperature difference between the contact areas of the right and left of the sweepers of two saddles compared, with the English saddle showing higher temperatures. Therefore, the Western saddle model, which has wider panels, despite not being a preferred model of endure riders, has proved to be more suitable for Arabian horse work.
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Chian, A. C. L., W. M. Santana, E. L. Rempel, F. A. Borotto, T. Hada, and Y. Kamide. "Chaos in driven Alfvén systems: unstable periodic orbits and chaotic saddles." Nonlinear Processes in Geophysics 14, no. 1 (January 24, 2007): 17–29. http://dx.doi.org/10.5194/npg-14-17-2007.

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Abstract. The chaotic dynamics of Alfvén waves in space plasmas governed by the derivative nonlinear Schrödinger equation, in the low-dimensional limit described by stationary spatial solutions, is studied. A bifurcation diagram is constructed, by varying the driver amplitude, to identify a number of nonlinear dynamical processes including saddle-node bifurcation, boundary crisis, and interior crisis. The roles played by unstable periodic orbits and chaotic saddles in these transitions are analyzed, and the conversion from a chaotic saddle to a chaotic attractor in these dynamical processes is demonstrated. In particular, the phenomenon of gap-filling in the chaotic transition from weak chaos to strong chaos via an interior crisis is investigated. A coupling unstable periodic orbit created by an explosion, within the gaps of the chaotic saddles embedded in a chaotic attractor following an interior crisis, is found numerically. The gap-filling unstable periodic orbits are responsible for coupling the banded chaotic saddle (BCS) to the surrounding chaotic saddle (SCS), leading to crisis-induced intermittency. The physical relevance of chaos for Alfvén intermittent turbulence observed in the solar wind is discussed.
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AWREJCEWICZ, J., C. H. LAMARQUE, and K. A. BROUGHAN. "GEOMETRY AND ORDER OF CHAOS." International Journal of Bifurcation and Chaos 09, no. 02 (February 1999): 327–47. http://dx.doi.org/10.1142/s0218127499000201.

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In the beginning a brief introduction to a symmetry increasing as well as to quantified geometrical structures of chaotic attractors have been given. Then, the research is focused on the Chossat–Golubitsky map. A saddle-node bifurcation on the boundary of the umbrella shape set of saddles, crises of two peculiar structures of saddles and an extremely high order of infinitely many flip and regular saddle orbits have been reported. The geometrical properties of hyperchaos and its relation to the Kakeya–Besicovitch and the Apollonian packing have been illustrated and discussed. A fractal organization of the successive periodic saddles and fractal normal forms have been described.
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HONG, LING, YINGWU ZHANG, and JUN JIANG. "A HYPERCHAOTIC CRISIS." International Journal of Bifurcation and Chaos 20, no. 04 (April 2010): 1193–200. http://dx.doi.org/10.1142/s0218127410026393.

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A crisis is investigated in high dimensional chaotic systems by means of generalized cell mapping digraph (GCMD) method. The crisis happens when a hyperchaotic attractor collides with a chaotic saddle in its fractal boundary, and is called a hyperchaotic boundary crisis. In such a case, the hyperchaotic attractor together with its basin of attraction is suddenly destroyed as a control parameter passes through a critical value, leaving behind a hyperchaotic saddle in the place of the original hyperchaotic attractor in phase space after the crisis, namely, the hyperchaotic attractor is converted into an incremental portion of the hyperchaotic saddle after the collision. This hyperchaotic saddle is an invariant and nonattracting hyperchaotic set. In the hyperchaotic boundary crisis, the chaotic saddle in the boundary has a complicated pattern and plays an extremely important role. We also investigate the formation and evolution of the chaotic saddle in the fractal boundary, particularly concentrating on its discontinuous bifurcations (metamorphoses). We demonstrate that the saddle in the boundary undergoes an abrupt enlargement in its size by a collision between two saddles in basin interior and boundary. Two examples of such a hyperchaotic crisis are given in Kawakami map.
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Dissertations / Theses on the topic "Saddle"

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Young, Todd Ray. "Saddle-node bifurcations with homoclinic orbits." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/29855.

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Ladenheim, Scott Aaron. "Constraint Preconditioning of Saddle Point Problems." Diss., Temple University Libraries, 2015. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/319906.

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Mathematics
Ph.D.
This thesis is concerned with the fast iterative solution of linear systems of equations of saddle point form. Saddle point problems are a ubiquitous class of matrices that arise in a host of computational science and engineering applications. The focus here is on improving the convergence of iterative methods for these problems by preconditioning. Preconditioning is a way to transform a given linear system into a different problem for which iterative methods converge faster. Saddle point matrices have a very specific block structure and many preconditioning strategies for these problems exploit this structure. The preconditioners considered in this thesis are constraint preconditioners. This class of preconditioner mimics the structure of the original saddle point problem. In this thesis, we prove norm- and field-of-values-equivalence for constraint preconditioners associated to saddle point matrices with a particular structure. As a result of these equivalences, the number of iterations needed for convergence of a constraint preconditioned minimal residual Krylov subspace method is bounded, independent of the size of the matrix. In particular, for saddle point systems that arise from the finite element discretization of partial differential equations (p.d.e.s), the number of iterations it takes for GMRES to converge for theses constraint preconditioned systems is bounded (asymptotically), independent of the size of the mesh width. Moreover, we extend these results when appropriate inexact versions of the constraint preconditioner are used. We illustrate this theory by presenting numerical experiments on saddle point matrices that arise from the finite element solution of coupled Stokes-Darcy flow. This is a system of p.d.e.s that models the coupling of a free flow to a porous media flow by conditions across the interface of the two flow regions. We present experiments in both two and three dimensions, using different types of elements (triangular, quadrilateral), different finite element schemes (continuous, discontinuous Galerkin methods), and different geometries. In all cases, the effectiveness of the constraint preconditioner is demonstrated.
Temple University--Theses
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Enniss, Harris. "A Refined Saddle Point Theorem and Applications." Scholarship @ Claremont, 2012. https://scholarship.claremont.edu/hmc_theses/33.

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Under adequate conditions on $g$, we show the density in $L^2((0,\pi),(0,2\pi))$ of the set of functions $p$ for which \begin{equation*} u_{tt}(x,t)-u_{xx}(x,t)= g(u(x,t)) + p(x,t) \end{equation*} has a weak solution subject to \begin{equation*} \begin{aligned} u(x,t)&=u(x,t+2\pi)\\ u(0,t)&=u(\pi,t)=0. \end{aligned} \end{equation*} To achieve this, we prove a Saddle Point Principle by means of a refined variant of the deformation lemma of Rabinowitz. Generally, inf-sup techniques allow the characterization of critical values by taking the minimum of the maximae on some particular class of sets. In this version of the Saddle Point Principle, we introduce sufficient conditions for the existence of a saddle-structure which is not restricted to finite-dimensional subspaces.
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Tahar, Guillaume. "Saddle connections of flat surfaces with poles." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCC163/document.

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Dans cette thèse, nous étudions plusieurs problèmes géométriques concernant les liens-selles de surfaces plates définies par des formes différentielles méromorphes ayant des pôles de degré arbitrairement grand. Dans le cas des 1-formes holomorphes, les surfaces sont d'aire finie et ont une infinité de liens-selles. Au contraire, pour les 1-formes méromorphes ainsi que les différentielles d'ordre supérieur (quadratiques et au delà) ayant des pôles dont le degré est suffisamment grand, les surfaces sont d'aire infinie et il est courant que le nombre de liens-selles soit fini. Nous étudions trois problèmes au sujet de telles surfaces. Le premier problème est la caractérisation des strates de différentielles dont les surfaces plates correspondantes ont toujours un nombre fini de liens-selles. Nous sommes parvenus à réduire le problème à un simple critère combinatoire relatif au profil de singularités de la strate. Pour ce premier problème, nous nous plaçons dans le cadre le plus général possible : celui des k-différentielles (de la forme f(z)dz^{k}) ayant au moins un pôle d'ordre supérieur ou égal à k. Le deuxième problème est celui de la caractérisation des groupes de Veech des surfaces plates avec pôles. Dans le cas classique des surfaces de (demi)-translation, il s'agit d'un problème très difficile. Ici, au contraire, la rigidité induite par la présence de pôles permet de donner une réponse complète. Enfin, nous proposons une caractérisation complète des familles de nombres complexes pouvant apparaître comme résidus aux pôles d'une différentielle méromorphe appartenant à une strate donnée. Ainsi, la géométrie plate permet de donner une réciproque au théorème des résidus dans laquelle on contrôle la multiplicité des singularités. Ce dernier résultat est le fruit d'une collaboration avec Quentin Gendron
In this thesis, we consider several geometric problems about saddle connections of flat surfaces defined by meromorphic differentials with poles of arbitrarily large degree. In the case of holomorphic 1-forms, surfaces are of finite area an have infinitely many saddle connections. On the contrary, if we consider meromorphic 1-forms and differentials of higher orders (quadratic and beyond) with at least one pole whose degree is large enough, flat surface are of infinite area and their number of saddle connections may be finite. We study three problems about such surfaces. The first problem is the characterization of the strata of differentials such that the corresponding flat surfaces always have a finite number of saddle connections. We achieved to reduce the problem to a to single combinatorial criterium depending on the singularity pattern of the stratum. When we deal with this problem, we adopt the most general framework of k-differentials (of the form f(z)dz^{k}) with at least one pole of order at least k. The second problem is characterization of Veech groups of flat surfaces with poles. In the classical case of (half)-translation surfaces, it is a very difficult problem. Here, rigidity induced by the poles makes possible to provide a complete answer. Finally, we provide a complete characterization of the families of complex numbers that can appear as residues at the poles of a meromorphic differential belonging to a gien stratum. Thus, flat geometry provides a reciprocal to the residue theorem in which we control the multiplicities of the singularities. This last result is the product of a collaboration with Quentin Gendron
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Claus, Lisa [Verfasser]. "Multigrid smoothers for saddle point systems / Lisa Claus." Wuppertal : Universitätsbibliothek Wuppertal, 2019. http://d-nb.info/1194196829/34.

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Schroeter, Klaus-Peter. "A business plan for Saddle Hill fishing company." Thesis, Stellenbosch : Stellenbosch University, 1994. http://hdl.handle.net/10019.1/72020.

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Thesis (MBA) -- Stellenbosch University, 1994.
Stellenbosch University. Faculty of Economic and Management Sciences. University of Stellenbosch Business School.
ENGLISH ABSTRACT: The trawler industry is on the brink of proserity. This progress will result in both the trawler industry and the state amending their policy formulation to adapt to changing circumstances. The government will, for instance, have to consider subsidising the building of boats and the establishment of infrastructure, which is becoming increasingly expensive, and is already being done abroad. On the other hand, planning and organisation of trawler industries will have to be done in close consultation with the government, who is in fact responsible for fish sources. This will result in an enormous responsibility for the government, who will have to improve research on fish resources and availability of fish species. This information is of the utmost importance to trawler industries that have to plan for future production and sales. The progress of trawler industries is not just influenced by the government but also by their own internal planning. Future development will definitely require more capital outlay from industries in the form of modernized catching and processing equipment. In the present-day highly competitive and rapidly changing environment it is difficult to generate funds if no assets can be shown. Smaller enterprises that are not financially strong enough to establish their own infrastructure, should consider amalgamation with other small or large enterprises. The author is of the opinion that the possibility to obtain the necessary funds for the establishment of an own infrastructure without the required security, should exist with an efficient business plan. Insufficient planning in new enterprises is possibly the major contributing factor towards failure. Without investing capital at this early stage, new ideas can be tested on paper by means of planning. A literature study was undertaken to evaluate the opinions of various authors on a business plan. Factors for success in a good business plan were highlighted as follows: keep the business plan brief; do not over-diversify the enterprise; avoid describing technical products and manufacturing process in a way only comprehensible by an expert; organise and wrap the business plan effectively; the plan must be future orientated; avoid exageration; highlight critical risks; discuss and include any relevant problems; take care that the business plan is as complete as possible; and identify the target market and avoid ambiguous, vague and unrealistic statements. A business plan has been compiled for the purpose of this study. using the preceding information. Finally, a recommendation regarding future capital absorption and extension has been made to the company concerned.
AFRIKAANSE OPSOMMING: Die treilbedryf staan op die drumpel van vooruitgang. Hierdie vooruitgang gaan meebring dat beide die treilondernemings en die Staat hul beleidsformulering sodanig sal moet verander om aan Ie pas by die veranderende omstandighede. Die Staat sal byvoorbeeld daaraan moet dink om die bou van bote, wat at hoe duurder word, en die oprigting van infrastruktuur te subsidieer. iets wat weI in die buiteland gedoen word. Aan die anderkant sal beplanning en organisasie van treilondememings in nouer kontak met die Staat, wat verantwoordelik is vir die beheer van visbronne, moet geskied. Dit plaas 'n geweldige taak op die skouers van die Staat, want by sal beter navorsing moet doen oor visbronne en die beskikbaarheid van vissoorte. Hierdie inligting is van groot belang vir treilondememings wat moet beplan vir produksie en verkope in die toekoms. Die vooruitgang van treilondememings word egteT nie slegs deuT die Staat beinvloed nie, maar ook deur hul eie interne beplanning. Toekomstige ontwikkeling gaan definitief meer kapitaal van ondememings verg in die vorm van beter en meer modeme vang- en verwerkingstoerusting. In vandag se hoogs kompeterende en snelveranderende omgewing is dit moeilik om fondse te genereer veral as geen bates getoon kan word nie. Klein ondememings wat nie kapitaalkragtig genoeg is om 'n eie infrastruktuur op te rig nie, moet dit gewoonlik oorweeg om met ander klein of groot ondememings te amalgameer. Die navorser is van mening dat met behulp van 'n goeie besigheidsplan daar wei 'n moontlikheid behoort te bestaan om die nodige fondse, sonder die vereiste sekuriteit, te bekom om sodoende 'n eie infrastruktuur op te rig. 'n Gebrek aan beplanning by nuwe ondernemings is waarskynlik een van die grootste enkele bydraende faktore tot mislukking. Deur beplanning kan nuwe idees op papier op proef gestel word sonder om kapitaal op hierdie vroee stadium te investeer. 'n Literatuur ondersoek is onderneem om verskillende skrywers se menings ten opsigte van 'n besigheidsplan te evalueer. Suksesfaktore vir 'n goeie besigheidsplan is dan ook uitgelig: • hou die besigheidsplan kort; moet nie die onderneming oor-diversifiseer nie; venny dit om die tegniese produkte en vervaardigingsproses op so 'n manier, dat net 'n kundige dit kan verstaan, te beskryf; organiseer en verpak die besigheidsplan doelmatig; orienteer die plan volgens die toekoms; venny oordrewendheid; lig kritieke risiko's uit; bespreek en sluit enige toepaslike probleme in; sorg dat die besigheidsplan so kompleet as moontlik is; identifiseer die teikenmark en venny dubbelsinnige, vae en onwerklike stellings. Met hierdie kennis as agtergrond is 'n besigheidsplan opgestel wat vir die doel van hierdie studie gebruik is. Ten slotte is 'n aanbeveling aan die betrokke maatskappy gemaak met die oog op toekomstige kapitaalopneming en uitbreiding.
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ENGVALL, THERESE. "Pressure sensitive textiles for integration in saddle pads." Thesis, Högskolan i Borås, Institutionen Textilhögskolan, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-17397.

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: In this thesis, capacitive textile pressure sensors have been developed. The sensors were meant to be integrated into saddle pads and be able to measure the pressure between the saddle and horse. The aim of the thesis was to create a theoretical and practical based map on how a textile pressure sensor can be made. Capacitance was found to be the most suitable pressure sensitive technique to be implemented in a textile structure. The project was divided into two cycles, where the first cycle consisted of laminating capacitive textile pressure sensors of readymade fabrics in different thicknesses and sizes. After testing the pressure sensitivity of these laminates, it was concluded that a thin fabric with some compressibility was sufficient for making a textile capacitive pressure sensor. However, the area cannot be too small. The second cycle consisted of weaving capacitive pressure sensors as three layer structures. The pressure sensitivity of the sensors and the effect of moisture were tested. The results showed that most of the woven sensors were able to sense a 50g change in weight even after a 700g load was put on. The moisture and water tests showed that the pressure sensors must be protected from water and moisture. It was also discovered that there is a lack of knowledge in how textile structures and fibres behave under compression and release. Models of how textiles behave during pressure are needed to do correct transformations between compression and pressure and predict how the textile will behave during different pressures.
Program: Masterutbildning i textilteknik
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Eksell, Per. "Imaging of bone spavin : a radiographic and scintigraphic study of degenerative joint disease in the distal tarsus in Icelandic horses /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2000. http://epsilon.slu.se/avh/2000/91-576-5922-2.pdf.

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Axelsson, Mats. "Bone spavin : clinical and epidemiological aspects of degenerative joint disease in the distal tarsus in Icelandic horses /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2000. http://epsilon.slu.se/avh/2000/91-576-5918-4.pdf.

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Borquez, Caballero Rodrigo Edgardo. "Calculating the Distance to the Saddle-Node Bifurcation Set." Thesis, KTH, Elektriska energisystem, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-119236.

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A power system will experience voltage collapse when the loads increase up to a certain critical limit, where the system physically cannot support the amount of connected load. This point identified as a Saddle- Node Bifurcation (SNB), corresponds to a generic instability of parameterized differential equation models and represents the intersection point where different branches of equilibria meet. At this point the jacobian matrix of the system is singular and the system loses stability bringing the typical scenario of voltage collapse. To prevent voltage instability and collapse, the computation of the closest distance from a present operating point to the saddle-node bifurcation set can be used as a loadability index useful in power system operation and planning. The power margin is determined by applying the iterative or direct method described in [16]. Numerical examples of both methods applied to IEEE 9-bus system and IEEE 39-bus system shows that the iterative method is more reliable although it requires a longer computation time. The stability of the system is negatively affected in two ways when generators reach their reactive power limits: the voltage stability margin is deteriorated, or immediate voltage instability and collapse is produced.
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Books on the topic "Saddle"

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Hopson, William. High Saddle. Bath: Chivers P., 1992.

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Saddle wolves. South Yarmouth, Ma: J. Curley, 1989.

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Saddle justice. Bath, England: Chivers Press, 1987.

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Saddle justice. Waterville, Me: Wheeler Pub., 2003.

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Jefferson's saddle. London: Robert Hale, 2015.

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Stuart, Matt. Saddle-man. Thorndike, Me: G.K. Hall, 1993.

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Paine, Lauran. Saddle Mountain. Thorndike, Me: Center Point Pub., 2007.

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High saddle. Bath, England: Chivers Press, 1991.

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1957-, Rogers Mary, and Jacobson William 1957-, eds. Saddle serenaders. Layton, UT: Gibbs Smith, 1994.

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Towell, Garv. Saddle pals. Madison, NC: Empire Pub., 1994.

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Book chapters on the topic "Saddle"

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Heppner, John B., David B. Richman, Steven E. Naranjo, Dale Habeck, Christopher Asaro, Jean-Luc Boevé, Johann Baumgärtner, et al. "Saddle." In Encyclopedia of Entomology, 3229. Dordrecht: Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6359-6_4001.

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Dineen, Seán. "Saddle Points." In Functions of Two Variables, 29–36. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-3250-1_5.

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Krivoshapko, S. N., and V. N. Ivanov. "Saddle Surfaces." In Encyclopedia of Analytical Surfaces, 561–65. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-11773-7_33.

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Börgers, Christoph. "Saddle-Node Collisions." In An Introduction to Modeling Neuronal Dynamics, 79–84. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51171-9_11.

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Teruya, Theodore H., and Ahmed M. Abou-Zamzam. "Aortic Saddle Embolus." In Operative Dictations in General and Vascular Surgery, 767–68. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-44797-1_224.

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Pumariño, Antonio, and J. Angel Rodríguez. "Saddle-focus connections." In Lecture Notes in Mathematics, 11–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/bfb0093339.

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Bartels, Sören. "Saddle-Point Problems." In Texts in Applied Mathematics, 247–81. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-32354-1_6.

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Gratwick, Marion. "Saddle gall midge." In Crop Pests in the UK, 306–9. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-1490-5_61.

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Zhou, Tianshou. "Saddle-Node Bifurcation." In Encyclopedia of Systems Biology, 1889. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-9863-7_501.

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Gass, Saul I., and Carl M. Harris. "Nash saddle-point." In Encyclopedia of Operations Research and Management Science, 551. New York, NY: Springer US, 2001. http://dx.doi.org/10.1007/1-4020-0611-x_658.

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Conference papers on the topic "Saddle"

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Cruz, Jazmin, Mario Garcia, Elizabeth Jackson, and James Yang. "Perineum Pressure Distribution Among Various Bicycle Saddles." In ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22688.

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Abstract Cycling is a widely popular exercise that is known to provide great health benefits. However, it has been questioned if cycling is responsible for genital numbness or Erectile Dysfunction (ED) due to compression of the perineum between the rider and the bicycle saddle. This study compares the perineal pressure distribution between three saddles (ISM, 3 West, and Fizik) for healthy, active male cyclists and a saddle recommendation is made. Using their own bikes, participants perform six randomized cycling trials (two per saddle) while sitting on a piezo-resistive pressure mat. Participants were asked to qualitatively rate the saddles after each trial. The quantitative results favor the ISM saddle due to its lower perineal pressure values, but the qualitative perceived comfort from the cyclists is split.
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Erdogan, Julien-Erdem, Ivica Zivanovic, and Matthieu Guesdon. "Deviation saddles for cables bridges: development and qualification ofstay cable technology." In IABSE Congress, New York, New York 2019: The Evolving Metropolis. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/newyork.2019.0976.

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<p>Deviation saddles for cables are regularly used in projects such as cable stayed bridges, suspended bridges or extradossed bridges. The choice of a deviation saddle may be imposed to improve the bridge aesthetics with a slender pylon and to simplify the construction with a solid pylon section. Saddles are a proper anchorage and must be designed such as to ensure a safe transfer of vertical forces and of differential forces of stay cables into the pylon structure.</p><p>For parallel strand cables, since grouted stay cable tends to disappear from commonly accepted design and technologies, due to corrosion protection and fatigue issues, the most widely used concept of saddle is made of a battery of individual tubes, placed inside a guide pipe poured of concrete.</p><p>The most recent saddle system developed consists in allowing the passage of the strands through the saddle without individual tubes. Strands go directly through concrete recesses within the Ultra High Performance Fiber Concrete (UHPFC) matrix. Recesses are made thanks to reusable rubber bars removed after poured concrete is hardened. Thanks to an optimized cross section of the recesses, individual holes maximize the friction between the concrete and specially sheathed strands with local application of a cohesive sheathing (Cohestrand®), which allow strands to transfer important asymmetrical loads to the saddle without sliding. Meanwhile, a continuous corrosion protection is ensured by the strand sheathing from one deck anchorage to the other.</p><p>This make the use of saddle a cost-effective and durable mean to deviate and anchor parallel strand cables, that suits Owners needing simple but robust design for stay cable or extradossed bridges. Such saddle bridge design is nowadays clearly described in the 7<span>th</span> edition of the PTI recommendations, that specifies the qualification process of saddle technologies, especially in regards to the accurate definition of a minimum friction coefficient.</p>
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Mohareb, Sherif, Arndt Goldack, and Mike Schlaich. "Simple Model for Contact Stress of Strands Bent over Circular Saddles." In IABSE Congress, Stockholm 2016: Challenges in Design and Construction of an Innovative and Sustainable Built Environment. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2016. http://dx.doi.org/10.2749/stockholm.2016.0001.

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Cable-stayed and extra-dosed bridges are today widely used bridge types. Recently, saddles have been used to deviate strands of cables in the pylons. Up to now the mechanics of strands on saddles are not well understood. It was found, that typical longitudinal contact stress distributions between strand and saddle show a strong nonlinearity and a high peak value around the detachment point, where the strand meets the saddle. This paper presents a procedure to analyse the longitudinal contact stress distribution obtained by FEM calculations: This contact stress can be idealised as a constant contact stress according to the Barlow's formula and a contact force at the detachment point due to the flexural rigidity of the bent tension elements. An analytical model is provided to verify this contact force. Finally, a formula is presented to calculate the maximum contact stress. This study provides the basis for further research on saddle design and fatigue of strands.
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Cherukuri, Ashish, and Jorge Cortes. "Asymptotic stability of saddle points under the saddle-point dynamics." In 2015 American Control Conference (ACC). IEEE, 2015. http://dx.doi.org/10.1109/acc.2015.7171030.

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Bontus, Claas, Roland Proksa, and Thomas Kohler. "New Saddle Trajectories for CT." In 2006 IEEE Nuclear Science Symposium Conference Record. IEEE, 2006. http://dx.doi.org/10.1109/nssmic.2006.354375.

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Poenaru, D. N., I. H. Plonski, and W. Greiner. "Saddle point shapes of nuclei." In SIXTH INTERNATIONAL CONFERENCE OF THE BALKAN PHYSICAL UNION. AIP, 2007. http://dx.doi.org/10.1063/1.2733031.

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Stefanovic, Radoslav, and Yaser Noman. "Design and Analysis of LPG Storage Bullets Supported on Multiple Saddles." In ASME 2010 Pressure Vessels and Piping Division/K-PVP Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/pvp2010-25052.

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The use of large, high pressure Liquid Petroleum Gas (LPG) storage bullets has become a common, and often assumed safe, practice in the petrochemical industry. The Engineering Equipment and Materials Users Association (EEMUA) is an organization that attempted to address design aspects related to mounded or buried bullets. Publication No. 190 published by the EEMUA [1] became a standard practice in the industry. However, the design recommended, and therefore addressed, by Publication 190 is for bullets directly supported by soil (i.e. without saddle supports). However, it has been noticed by the authors that many users are requesting these storage bullets be supported by saddles resting on foundations in order to minimize the chance of unexpected settling and any motion of the bullets under ground. The large span of these bullets requires more than two saddles adding to the complexity of the design due to statically indeterminate construction, differential settlement and uneven supports. This paper focuses on major issues related to the design of such bullets. First, the loads induced by mound weight, pressure due to mound, and the loads due to longitudinal thermal expansion and soil resistance to this expansion is analyzed. Next, a method for calculating the multiple saddle reactions and bending moments at spans and supports is provided. A simplified method for assessing the effect of differential settlement between saddles is proposed.
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HUNG, CHING-MAO, CHAO-HO SUNG, and CHUNG-LUNG CHEN. "Computation of saddle point of attachment." In 22nd Fluid Dynamics, Plasma Dynamics and Lasers Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1991. http://dx.doi.org/10.2514/6.1991-1713.

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Reddy, Chandan K., and Hsiao-Dong Chiang. "Finding saddle points using stability boundaries." In the 2005 ACM symposium. New York, New York, USA: ACM Press, 2005. http://dx.doi.org/10.1145/1066677.1066729.

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Kappos, Efthimios. "Saddle exits in optimal control problems." In 26th IEEE Conference on Decision and Control. IEEE, 1987. http://dx.doi.org/10.1109/cdc.1987.272486.

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Reports on the topic "Saddle"

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Guarino, V., J. Grudzinski, and E. Petereit. Extended barrel support saddle design and analysis. Office of Scientific and Technical Information (OSTI), February 2002. http://dx.doi.org/10.2172/793907.

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Terhune, R., S. McDonald, and M. Kotliar. M119 Howitzer Saddle Gun Fire Finite Element Analysis. Fort Belvoir, VA: Defense Technical Information Center, December 2011. http://dx.doi.org/10.21236/ada553771.

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Schuller, Reid, and Ronald L. Exeter. Saddle Bag Mountain Research Natural Area: guidebook supplement 34. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station, 2007. http://dx.doi.org/10.2737/pnw-gtr-731.

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Jan Raines, Jan Raines. Evaluating the Nutritional Status in Captive Saddle-billed Storks. Experiment, October 2016. http://dx.doi.org/10.18258/8109.

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Younes, W., and D. Gogny. Collective Dissipation from Saddle to Scission in a Microscopic Approach. Office of Scientific and Technical Information (OSTI), September 2012. http://dx.doi.org/10.2172/1053675.

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Godavarty, Dinesh, and Paul D. Orkwis. Secondary Saddle Points and Vortex Asymmetry in Three Dimensional Flows. Fort Belvoir, VA: Defense Technical Information Center, February 2000. http://dx.doi.org/10.21236/ada379041.

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Leeds, Michael, and Hugh Rockoff. Jim Crow in the Saddle: The Expulsion of African American Jockeys from American Racing. Cambridge, MA: National Bureau of Economic Research, December 2020. http://dx.doi.org/10.3386/w28167.

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Greene, J. P., S. L. Schiel, and G. E. Thomas. A description of a wide beam saddle field ion source used for nuclear target applications. Office of Scientific and Technical Information (OSTI), July 1997. http://dx.doi.org/10.2172/505377.

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LePain, D. L., P. G. Lillis, K. P. Helmold, and R. G. Stanley. Migrated hydrocarbons in exposure of Maastrichtian nonmarine strata near Saddle Mountain, lower Cook Inlet, Alaska. Alaska Division of Geological & Geophysical Surveys, May 2012. http://dx.doi.org/10.14509/23943.

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Newcomer, Darrell R., Edward C. Thornton, and Terry L. Liikala. Groundwater Chemistry and Hydrogeology of the Upper Saddle Mountains Basalt-Confined Aquifer South and Southeast of the Hanford Site. Office of Scientific and Technical Information (OSTI), November 2002. http://dx.doi.org/10.2172/15002444.

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