Relevant bibliographies by topics / Internal lengths

Academic literature on the topic 'Internal lengths'

Author: Grafiati
Published: 8 June 2024

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 'Internal lengths.'

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.

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Journal articles on the topic "Internal lengths":

1

Zhao, Pin, and Jian Shu Ye. "Research on the Installation Lengths of Zero Block Concrete Segment in Prestressed Concrete Box-Girder Beams with Corrugated Steel Webs." Advanced Materials Research 255-260 (May 2011): 1147–53. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.1147.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
In order to study the reasonable installation lengths of zero block concrete segment in prestressed concrete box-girder beams with corrugated steel webs, a numerical analysis on the length of different zero blocks in PC box girder beams with corrugated steel webs is made by the finite element software ANSYS. The influence of the installation lengths of zero block concrete segment on the structure control section's internal forces and deformation is discussed. The results indicate: the impact of length changes of zero block on box girder deflection is greater than its impact on internal forces; in terms of deflection, the displacement influence in quarter-section in middle span is the largest; and in terms of internal forces, the internal forces influence of the junction section formed by zero block concrete segment and beam segment with corrugated steel webs is the largest. According to the above results and the relevant information of constructed bridges, the reasonable setting length of zero block concrete segment has been provided, that the ratio L0/L of installation lengths and span for zero block of box girder should be in the range of 0.05 to 0.10.
2

Dahmer, Iulia, and Götz Kersting. "The internal branch lengths of the Kingman coalescent." Annals of Applied Probability 25, no. 3 (June 2015): 1325–48. http://dx.doi.org/10.1214/14-aap1024.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Ford, Jonathan, and Angelo Camerlenghi. "Geostatistical characterization of internal structure of mass-transport deposits from seismic reflection images and borehole logs." Geophysical Journal International 221, no. 1 (December 19, 2019): 318–33. http://dx.doi.org/10.1093/gji/ggz570.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
SUMMARY Seismic reflection images of mass-transport deposits often show apparently chaotic, disorded or low-reflectivity internal seismic facies. The lack of laterally coherent reflections can prevent horizon-based interpretation of internal structure. This study instead inverts for geostatistical parameters which characterize the internal heterogeneity of mass-transport deposits from depth-domain seismic reflection images. A Bayesian Markov Chain Monte Carlo inversion is performed to estimate posterior probability distributions for each geostatistical parameter. If the internal heterogeneity approximates an anisotropic von Kármán random medium these parameters can describe the structural fabric of the imaged mass-transport deposit in terms of lateral and vertical dominant scale lengths and the Hurst number (roughness). To improve the discrimination between vertical and lateral dominant scale lengths an estimate of the vertical dominant scale length from a borehole is used as a prior in the inversion. The method is first demonstrated on a synthetic multichannel seismic reflection image. The vertical and lateral dominant scale lengths are estimated with lower uncertainty when data from a synthetic borehole data are included. We then apply the method to a real data example from Nankai Trough, offshore Japan, where a large mass-transport deposit is imaged in a seismic profile and penetrated by a borehole. The results of the inversion show a downslope shortening in lateral scale length, consistent with progressive down-slope disaggregation of the mass-flow during transport. The dominant scale lengths can be used as a proxy for strain history, which can improve understanding of post-failure dynamics and emplacement of subacqueous mass-movements, important for constraining the geohazard potential from future slope failure.
4

Li, Guoqi, Lifu Zhu, Yongjun Hu, Yingzi Jin, Toshiaki Setoguchi, and Heuy Dong Kim. "Influence of Chord Lengths of Splitter Blades on Performance of Small Axial Flow Fan." Open Mechanical Engineering Journal 9, no. 1 (June 25, 2015): 361–70. http://dx.doi.org/10.2174/1874155x01509010361.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
On the basis of small axial fan with five blades, 6 types of small axial flow fans with different chord lengths splitter blades were designed. Numerical simulation of 6 fan models with splitter blades and prototype fan were done by using Fluent. Based on the obtained simulation results, internal flow characteristics and aerodynamic noise were analyzed and compared. It indicates that: splitter blades with suitable chord length have improved significantly on internal flow characteristics, which inhibits backflow from pressure surface to the suction surface at blade tip and leading edge and restrains flow separation. The 6 model fans are better than prototype fan on aerodynamic noise improvement, but too long or too short chord lengths are both disadvantage to improve aerodynamic noise. The results reveal that 2/6, 3/6 and 4/6 chord length model have relatively better acoustic characteristics and internal flow characteristics. The research program will offer a reference for structural improvements and noise reduction on small axial flow fan.
5

Kersting, Götz, Juan Carlos Pardo, and Arno Siri-Jégousse. "Total internal and external lengths of the Bolthausen-Sznitman coalescent." Journal of Applied Probability 51, A (December 2014): 73–86. http://dx.doi.org/10.1239/jap/1417528468.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
In this paper we study a weak law of large numbers for the total internal length of the Bolthausen-Sznitman coalescent, thereby obtaining the weak limit law of the centered and rescaled total external length; this extends results obtained in Dhersin and Möhle (2013). An application to population genetics dealing with the total number of mutations in the genealogical tree is also given.
6

Kersting, Götz, Juan Carlos Pardo, and Arno Siri-Jégousse. "Total internal and external lengths of the Bolthausen-Sznitman coalescent." Journal of Applied Probability 51, A (December 2014): 73–86. http://dx.doi.org/10.1017/s0021900200021203.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
In this paper we study a weak law of large numbers for the total internal length of the Bolthausen-Sznitman coalescent, thereby obtaining the weak limit law of the centered and rescaled total external length; this extends results obtained in Dhersin and Möhle (2013). An application to population genetics dealing with the total number of mutations in the genealogical tree is also given.
7

Mao, Boyan, Wenxin Wang, Bao Li, Xiaoyan Zhang, and Youjun Liu. "Competitive Flow Effects of Internal Mammary Artery Bypass with Different Coronary Stenosis Lengths." International Journal of Computational Methods 16, no. 03 (March 17, 2019): 1842013. http://dx.doi.org/10.1142/s0219876218420136.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
In coronary artery bypass grafting (CABG), competitive flow usually happens when the native coronary has a moderate stenosis. But whether the competitive flow could be affected by the length of this moderate stenosis is still a problem. This study constructs a series of CABG models with different stenosis lengths and uses multi-scale modeling method for numerical simulations. The results contain graft flow, the magnitude of competitive flow, wall shear stress (WSS) and oscillating shear index (OSI). According to the results, it is known that the effect of competitive flow will decrease with the increase of stenosis length. But when the length reaches 15[Formula: see text]mm, the competitive flow will hardly change anymore.
8

Sleboda, David A., and Thomas J. Roberts. "Internal fluid pressure influences muscle contractile force." Proceedings of the National Academy of Sciences 117, no. 3 (December 26, 2019): 1772–78. http://dx.doi.org/10.1073/pnas.1914433117.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Fluid fills intracellular, extracellular, and capillary spaces within muscle. During normal physiological activity, intramuscular fluid pressures develop as muscle exerts a portion of its developed force internally. These pressures, typically ranging between 10 and 250 mmHg, are rarely considered in mechanical models of muscle but have the potential to affect performance by influencing force and work produced during contraction. Here, we test a model of muscle structure in which intramuscular pressure directly influences contractile force. Using a pneumatic cuff, we pressurize muscle midcontraction at 260 mmHg and report the effect on isometric force. Pressurization reduced isometric force at short muscle lengths (e.g., −11.87% of P0 at 0.9 L0), increased force at long lengths (e.g., +3.08% of P0 at 1.25 L0), but had no effect at intermediate muscle lengths ∼1.1–1.15 L0. This variable response to pressurization was qualitatively mimicked by simple physical models of muscle morphology that displayed negative, positive, or neutral responses to pressurization depending on the orientation of reinforcing fibers representing extracellular matrix collagen. These findings show that pressurization can have immediate, significant effects on muscle contractile force and suggest that forces transmitted to the extracellular matrix via pressurized fluid may be important, but largely unacknowledged, determinants of muscle performance in vivo.
9

Brüse, Sabine, J. Dee, and W. D. Prieur. "Internal Fixation with a Veterinary Cuttable Plate in Small Animals." Veterinary and Comparative Orthopaedics and Traumatology 02, no. 01 (1989): 40–46. http://dx.doi.org/10.1055/s-0038-1633188.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Summary63 cases (42 cats, 21 dogs) were treated with a newly developed plate that can be cut during surgery to the required length and may be sandwiched if one plate is not rigid enough. The plate is manufactured in lengths of 30 cm and in two different thicknesses, 1.0 mm and 1.5 mm. The thinner plate is used with 1.5 mm or 2.0 mm Cortex screws and the thicker one with 2.0 or 2.7 mm Cortex screws. Healing was generally uneventful with the exceptions noted.
10

Mahmoud, Hosam M. "Limiting Distributions for Path Lengths in Recursive Trees." Probability in the Engineering and Informational Sciences 5, no. 1 (January 1991): 53–59. http://dx.doi.org/10.1017/s0269964800001881.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
The depth of insertion and the internal path length of recursive trees are studied. Luc Devroye has recently shown that the depth of insertion in recursive trees is asymptotically normal. We give a direct alternative elementary proof of this fact. Furthermore, via the theory of martingales, we show that In, the internal path length of a recursive tree of order n, converges to a limiting distribution. In fact, we show that there exists a random variable I such that (In – n In n)/n→I almost surely and in quadratic mean, as n → α. The method admits, in passing, the calculation of the first two moments of In.
More sources
You might also be interested in the extended bibliographies on the topic 'Internal lengths' for particular source types:
Journal articles Dissertations / Theses Books

Dissertations / Theses on the topic "Internal lengths":

1

Chamma, Layal. "Effets des longueurs internes microstructurales sur le comportement mécanique des aciers ferritiques : caractérisations expérimentales et modélisation micromécanique." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0350.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Les longueurs internes microstructurales jouent un rôle important sur le comportement mécanique local et macroscopique des aciers. Ces longueurs internes correspondent notamment à la taille des grains et à une couche de densités de "dislocations géométriquement nécessaires" (GND) accumulées en raison des incompatibilités de réseau cristallin crées autour des joints de grains (ou des joints de phase), d'une épaisseur notée λ, produite pendant la déformation plastique. Dans cette étude, un acier ferritique polycristallin monophasé à faible teneur en carbone (Al-k) produit par ArcelorMittal a été étudié, en considérant des échantillons non déformés et pré-déformés à différents niveaux de déformation en traction. La densité de GND a été estimée à partir de cartes EBSD bidimensionnelles (2D) en considérant les cinq composantes du tenseur de Nye disponibles et calculées à partir des courbures du réseau. Des essais de nanoindentation instrumentée ont ensuite été réalisés avec une pointe Berkovich et une charge de 1 mN. La densité totale de dislocations a été estimée à l'aide d'un modèle mécanistique basé sur les mesures de nanodureté. Une étude combinée utilisant à la fois l'EBSD-2D et la nanoindentation instrumentée a alors été proposée afin de quantifier l'existence et l'évolution de la longueur interne λ de la zone affectée par les joints de grains. Tout d'abord, une étude locale a été réalisée sur deux paires de grains provenant d'une éprouvette pré-déformée en traction à 18% de déformation plastique. Cette étude a montré une corrélation spatiale claire entre la densité totale de dislocations déduite des mesures de nanodureté et la densité de GND obtenue par EBSD-2D. De forts gradients spatiaux de densités de GND et de densités totales de dislocations ont été observés sur une des paires de grains étudiée. Une couche d'épaisseur λL proche de 2µm a été trouvée par les deux techniques. Cependant, l'étude de l'évolution locale de λL pour un même grain avec la déformation plastique n'a pas été possible par les deux techniques. De plus, l'étude locale souffrait d'un manque de représentation statistique. Par conséquent, afin d'améliorer la description de la longueur interne λ tout au long de la déformation plastique, nous avons proposé une analyse statistique basée sur toutes les données obtenues par EBSD-2D et par nanoindentation pour s'éloigner du choix arbitraire des grains. Ensuite, une analyse statistique des données expérimentales a été réalisée. Le but était de déterminer une longueur interne statistique λS à chaque taux de déformation plastique par les deux méthodes expérimentales. Les résultats obtenus par les deux méthodes ont confirmé l'existence statistique d'un gradient de densités de dislocations aux joints de grains qui nous a permis de déterminer une longueur λS évolutive au cours de la déformation plastique. Par ailleurs, les résultats expérimentaux ont montré que les grains ferritiques dans l'acier Al-k pouvaient être divisés en deux régions mécaniquement différentes. La première région est située à proximité du joint de grains, où un gradient de densité de dislocations a été clairement observé et s'étend en moyenne sur la distance λS. La deuxième région est l'intérieur du grain où aucune variation marquée des densités de dislocations n'a été reportée en moyenne. Les mesures expérimentales ont été utilisées pour alimenter une nouvelle approche à champs moyen intégrant les longueurs internes microstructurales (ACMLI) capable de capter les effets de taille de grains. Cette nouvelle approche intègre directement l'évolution de la longueur interne λS mesurée expérimentalement. En plus de représenter fidèlement le comportement macroscopique, les prédictions des densités de dislocations à plusieurs niveaux de déformation comparée aux mesures expérimentales et une évolution réaliste des champs mécaniques locaux dans chaque phase ont été obtenus
Microstructural internal lengths play an important role on the local and macroscopic mechanical behavior of steels. These internal lengths correspond, in particular, to the grain size and to the thickness λ of the layer of "geometrically necessary dislocations" (GNDs) accumulated at grain boundaries (GBs) due to crystal lattice incompatibilities, produced during plastic deformation. In this study, a single-phase polycrystalline ferritic steel with low carbon content (Al-k) produced by ArcelorMittal was investigated through the analysis of undeformed and pre-deformed samples at different tensile deformations. The GND density was estimated from two-dimensional EBSD (2D) maps by considering the available five components of the Nye tensor computed from lattice curvatures. Instrumented nanoindentation tests were then performed with a Berkovich tip and a load of 1 mN. The total dislocation densities were estimated using a mechanistic model from the nanohardness measurements. A combined study using both 2D-EBSD and instrumented nanoindentation was then proposed to quantify the existence and the evolution of the internal length λ of the GB affected zone. First, a local study was performed on two pairs of grains from a specimen pre-deformed at 18% of plastic deformation. This study showed a clear spatial correlation between the total dislocation densities deduced from nanohardness measurements and the GND densities obtained from 2D-EBSD. Strong spatial gradients of GND and total dislocation density were observed on one of the studied grain pairs. A layer of thickness λL around 2µm was found by both techniques. However, it was not possible to do an in-situ study of the local evolution of λL with plastic deformation for a same grain using the both techniques. Moreover, the local study was limited owing to a lack of statistical representation. Therefore, in order to improve the description of the internal length evolution during the plastic deformation, a statistical analysis based on all 2D-EBSD and nanoindentation data was proposed. The goal was to determine a statistical internal length λS at each plastic strain by both experimental methods. The results obtained by these methods confirmed the statistical existence of a gradient of dislocation densities at GBs. As well, it allowed us to determine an evolving internal length λS during plastic deformation. Furthermore, the experimental results showed that the ferritic grains in Al-k steel could be divided into two mechanically different regions. The first region is located near the GBs, where a dislocation density gradient was clearly observed to spread over the characteristic distance λS. The second region is the interior of the grain where no marked variation in average dislocation density was found. The experimental measurements were used to improve a new Internal Length Mean Field (ILMF) approach capable to capture grain size effects. This new approach directly integrates the evolution law of the internal length λS. In addition to the prediction of the macroscopic behavior, a good estimate of the evolution of dislocation densities compared to the experimental measurements and a realistic evolution of the local fields in each phase were obtained
2

Jarmolowicz, David P. "The fixed-interval scallop effects of reinforcer magnitude and interval length /." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10316.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Thesis (M.S.)--West Virginia University, 2009.
Title from document title page. Document formatted into pages; contains vii, 50 p. : ill. Includes abstract. Includes bibliographical references (p. 37-41).
3

deCamp, Philip Draper. "The efficiency of nonparametric inference methods based on confidence interval lengths." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/25510.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Bort, Anja [Verfasser]. "The Role of External and Internal Stress on Telomere Length Regulation / Anja Bort." Konstanz : KOPS Universität Konstanz, 2017. http://d-nb.info/1200354907/34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Liu, Luchen. "Interval Estimation for Binomial Proportion, Poisson Mean, and Negative –binomial Mean." Thesis, Uppsala universitet, Statistiska institutionen, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-175767.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
This paper studies the interval estimation of three discrete distributions: thebinomial distribution, the Poisson distribution and the negative-binomialdistribution. The problem is the chaotic behavior of the coverage probabilityfor the Wald interval. To solve this problem, alternative confidence intervals areintroduced. Coverage probability and expected length are chosen to be thecriteria evaluating the intervals.In this paper, I firstly tested the chaotic behavior of the coverageprobability for the Wald interval, and introduced the alternative confidenceintervals. Then I calculated the coverage probability and expected length forthose intervals, made comparisons and recommended confidence intervals forthe three cases. This paper also discussed the relationship among the threediscrete distributions, and in the end illustrated the applications on binomialand Poisson data with brief examples.
6

Gosselin, Frederic. "Why do we SLIP to the basic level? : a formal model." Thesis, University of Glasgow, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312669.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Hauck, João Vitor de Sá. "Iterative edge length interval constraining in triangular meshes based on local parametrization." Universidade Federal de Juiz de Fora (UFJF), 2015. https://repositorio.ufjf.br/jspui/handle/ufjf/4827.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Submitted by Renata Lopes (renatasil82@gmail.com) on 2017-06-06T13:21:41Z No. of bitstreams: 1 joaovitordesahauck.pdf: 33226275 bytes, checksum: b7a8ed469369e9bbccd22738ced13ab0 (MD5)
Approved for entry into archive by Adriana Oliveira (adriana.oliveira@ufjf.edu.br) on 2017-06-06T14:07:12Z (GMT) No. of bitstreams: 1 joaovitordesahauck.pdf: 33226275 bytes, checksum: b7a8ed469369e9bbccd22738ced13ab0 (MD5)
Made available in DSpace on 2017-06-06T14:07:12Z (GMT). No. of bitstreams: 1 joaovitordesahauck.pdf: 33226275 bytes, checksum: b7a8ed469369e9bbccd22738ced13ab0 (MD5) Previous issue date: 2015
CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Malhas com restrições no comprimento das arestas são úteis para diversas aplicações, especialmente para simulações de processos químicos e físicos. Este trabalho apresenta um método iterativo para remalhar uma malha triangular arbitraria de variedade 2 em uma malha com o comprimento de todas as arestas dentro de um intervalo de restrição definido pelo usuário. O método usa operações estelares para ajustar a quantidade de vértices e triângulos no modelo e para melhorar a valência dos vértices. Ele também aplica o operador Laplaciano em um espaço paramétrico local para melhorar a distribuição de vértices sobre a superfície. Propõe-se, uma otimização não linear, aplicada localmente, para os casos em que a malha é praticamente regular. Perdas geométricas são evitadas pela realização de uma projeção sobre a superfície original. O método proposto resulta em uma malha praticamente regular, com os vértices distribuídos uniformemente sobre a superfície. A dual da malha é usada em simulações de nano estruturas de carbono como uma aplicação do método. A principal contribuição deste trabalho é uma nova abordagem para restringir explicitamente o comprimento das arestas em um intervalo dado. Nosso método ainda garante baixa perda global de geometria e baixo custo de memória em comparação com métodos disponíveis na literatura.
Meshes with constraints in the edge length are useful for several applications, spe-cially for chemical and physical simulations. This work presents an iterative method for remeshing an arbitrary triangular 2-manifold mesh into a mesh with all edge lengths within an user-defined constraining interval. The method uses stellar operations to adjust the amount of vertices and triangles in the model and for improving the valence of the vertices. It also applies the Laplacian operator in a local parametric space to improve the distribution of the vertices over the surface. We propose a nonlinear optimization, locally applied, for cases in which the mesh is almost regular. Geometric losses are prevented by performing a projection over the original surface. Our method results in a nearly regu-lar mesh, with vertices uniformly distributed over the surface. The dual of the mesh is used in simulations of carbon nanostructures as an application of the method. The main contribution of this work is a new approach for constraining the edge length within an explicitly given interval. Our method also ensures lower global geometry losses and lower memory cost in comparison to methods available in the literature.
8

Lee, Sang Hyun. "Modelling growth and yield of Douglas-fir using different interval lengths in the South Island of New Zealand." Thesis, University of Canterbury. Forestry, 1998. http://hdl.handle.net/10092/7204.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
This study describes several refinements and improvements in whole stand growth and yield modelling of Douglas-fir grown in four regions of the South Island of New Zealand, namely Canterbury, Nelson, Southland and Westland. Modelling growth and forecasting yields are necessary for providing adequate tools with which to manage wood production from forests. The study comprised three major components: 1) development of whole stand growth and yield models with data sets of various interval lengths; 2) cross fitting models with different data sets reciprocally; and 3) check estimates using a growth and yield model derived from a data set free of auto-correlation. The methodology emphasised in developing the equations in this study involved rearrangement of the data to reflect different interval lengths among re-measurements for modelling purposes. Modification of data sets allowed an investigation into which growth intervals should be used to obtain the least biased models overall, and efficiently. The approach involved fitting single equations to each of three state variables, mean top height (h1OO), basal area/ha (0) and stocking/ha (N). Differences in growth trajectories across the four regions were identified and incorporated into single variable equations using dummy variables for improving the fitting of mean top height (h1OO), basal area/ha (0), and stocking/ha (N) equations. The main finding from this study was the level of improvement in making predictions through adoption of a mixed interval projection equation strategy compared with other options. Examining consistency among the predicting equations which had been developed from the different interval data sets, involved testing each form of model individually for all the data sets. The models based on mixed intervals were found to fit well for all the other interval length data sets. A subset of uncorrelated data was then created by selecting one re-measurement from each permanent sample plot (PSP), which was then used to validate the appropriateness of the equations derived from the full data sets, in order to overcome problems of dealing with correlated data. Coefficients for each of the equations for mean top height, basal area/ha and stocking/ha which were derived from this check data set were found to be very similar to the regression coefficients obtained from the full data set. Although the growth models developed in this study may require further examination, they do provide a very useful guide for selecting appropriate re-measurement interval lengths to derive satisfactory models which are the least biased overall. It is strongly recommended that modellers in the future adopt a mixed interval strategy as one data set option to evaluate.
9

Goda, Ibrahim. "Micromechanical models of network materials presenting internal length scales : applications to trabecular bone under stable and evolutive conditions." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0055/document.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Des méthodes micromécaniques spécifiques ont été développées pour la détermination du comportement effectif de matériaux cellulaires dotés d’une architecture discrète à l’échelle microscopique. La méthode d’homogénéisation discrète a été appliquée à des structures tissées monocouches ainsi qu’à l’os trabéculaire. La topologie discrète initiale de ces milieux est remplacée à l’échelle mésoscopique par un milieu effectif anisotrope micropolaire, qui rend compte des effets d’échelles observés. Ces méthodes d’homogénéisation permettent d’accéder à des propriétés classiques et non classiques dont la mesure expérimentale est souvent difficile. Des modèles 3D ont été développé afin de décrire la rupture fragile et ductile de l’os trabéculaire, incorporant des effets de taille des surfaces d’écoulement plastique. Nous avons construit par des analyses éléments finis de la microstructure de l’os trabéculaire un milieu de substitution 3D homogène, orthotrope de type couple de contraintes, sur la base d’une équivalence en énergie. Les tissus osseux ont la capacité d’adapter leur densité locale et leur taille et forme aux stimuli mécaniques. Nous avons développé des modèles de remodelage interne et externe dans le cadre de la thermodynamique des processus irréversibles, aux échelles cellulaire et macroscopique. Finalement, le remodelage interne anisotrope a été couplé à l’endommagement de fatigue, dans le cadre de la théorie continue de l’endommagement
A methodology based on micromechanics has been developed to determine the effective behavior of network materials endowed with a discrete architecture at the microscopic level. It relies on the discrete homogenization method, which has been applied to textile monolayers and trabecular bones. The initially discrete topology of the considered network materials results after homogenization at the mesoscopic level in anisotropic micropolar effective continuum, which proves able to capture the observed internal scale effects. Such micromechanical methods are useful to remedy the difficulty to measure the effective mechanical properties at the intermediate mesoscopic level scale. The bending and torsion responses of vertebral trabecular bone beam specimens are formulated in both static and dynamic situations, based on the Cosserat theory. 3D models have been developed for describing the multiaxial yield and brittle fracture behavior of trabecular bone, including the analysis of size-dependent non-classical plastic yield. We have constructed by FE analyses a homogeneous, orthotropic couple-stress continuum model as a substitute of the 3D periodic heterogeneous cellular solid model of vertebral trabecular bone, based on the equivalent strain energy approach. Bone tissues are able to adapt their local density and load bearing capacities as well as their size and shape to mechanical stimuli. We have developed models for combined internal and external bone remodeling in the framework of the thermodynamics of irreversible processes, at both the cellular and macroscopic levels. We lastly combined anisotropic internal remodeling with fatigue continuum damage
10

Chavarria, Pablo C. "Reduction of Confidence Interval Length for Small-Normal Data Sets Utilizing Bootstrap and Conformal Prediction Methods." Thesis, California State University, Long Beach, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10840988.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:

It is of common practice to evoke a t-confidence interval for estimating the mean of a small data set with an assumed Normal distribution. These t-intervals are known to be wide to account for the lack of information. This thesis will focus on exploring ways to reduce the length of the interval, while preserving the level of confidence. Simulated small normal data sets will be used to analyze a combination of Bootstrapping and Conformal Prediction methods, while investigating measures of spread, such as standard deviation, kurtosis, excess CS kurtosis, skewness, etc. to create a criterion for when this combination of methodologies will greatly reduce the interval length. The goal is to be able to use the insight simulated data have to offer in order to apply to real world data. If time permits, a further look into the theory behind the results will be explored.

More sources

Books on the topic "Internal lengths":

1

Achadi, Endang L. The contrabution of family planning and breastfeeding to birth interval lengths. Depok, West Java, Indonesia: Center for Child Survival, University of Indonesia, 1991.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

R, Wang C., and United States. National Aeronautics and Space Administration., eds. Heat transfer computations of internal flows with combined hydraulic and thermal developing length. [Washington, DC]: National Aeronautics and Space Administration, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Chartrand, Neil David. The roles of gender, illumination, and interval length in subjective time estimation. Sudbury, Ont: Laurentian University, Department of Psychology, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Ogawa, Akiko. An R-to-R interval device incorporating a variable-length word encoding scheme. Ottawa: National Library of Canada, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Kotecha, Dinesh N. Asset rents in the internal market: Charging property occupiers an "arms length" rent for theuse of property. Northampton: Nene College, 1994.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Schönfelder, Stefan. Urban rhythms and travel behaviour: Spatial and temporal phenomena of daily travel. Farnham, England: Ashgate, 2010.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Institute of Medicine (U.S.). Committee to Review the Health Effects in Vietnam Veterans of Exposure to Herbicides. Veterans and Agent Orange: Length of presumptive period for association between exposure and respiratory cancer. Washington, D.C: National Academies Press, 2004.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
8

Pick, Daniel. 3. A case of obsessional neurosis. Oxford University Press, 2015. http://dx.doi.org/10.1093/actrade/9780199226818.003.0003.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
‘A case of obsessional neurosis’ discusses the case of a patient that Sigmund Freud first met in 1907. This particular and complicated patient was known as ‘The Rat Man’. The patient faced a desperate internal situation and was also incredulous, as his analysis unfolded, that he could be so encumbered by thoughts and driven to actions that defied rational sense. Freud went to extraordinary lengths to grasp the ideas behind his patient’s apparently nonsensical activities, to trace his psychic history, and to understand how obsessional doubts governed his life. Freud’s 1923 model of the mind and its three agencies—the superego, ego, and id—are also considered.
9

Yust, Jason. Timespan Intervals. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190696481.003.0006.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
David Lewin’s concept of timespan interval is applied to theories of hypermeter and rhythmic structure. The special property of timespan intervals is that the distances between them are measured relative to their lengths. They are therefore useful for equating hierarchical structures of timespans appearing at different levels of rhythmic structure, as an analysis of hemiolas in the F major prelude J.S. Bach’s Well-Tempered Clavier book I shows. A system of transformations is defined for navigating hierarchical networks of timespans, including translations, containment relations, and projections. The operations used to define rhythmic classes (swing, squeeze, syncopation, and meter change) are defined in terms of extensions and truncations applied within a structural network.
10

Vázquez, Montserrat Martínez, Juan Pablo Larreta Zulategui, Juan Cuartero Otal, and Regina Gutiérrez Pérez. Interfaz Léxico-Gramática: Construcciones Españolas en Contraste con Las Lenguas Germánicas. Lang GmbH, Internationaler Verlag der Wissenschaften, Peter, 2022.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Internal lengths":

1

Marotti de Sciarra, Francesco. "A Nonlocal Model of Plasticity and Damage with Different Internal Lengths." In Inelastic Behavior of Materials and Structures Under Monotonic and Cyclic Loading, 171–84. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-14660-7_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Kozera, Ryszard, Lyle Noakes, and Reinhard Klette. "External versus Internal Parameterizations for Lengths of Curves with Nonuniform Samplings." In Geometry, Morphology, and Computational Imaging, 403–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/3-540-36586-9_26.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Zakirov, Azamat, Ilyas Yanbukhtin, Timur Mamarozikov, Djangar Ilyasos, and Otabek Aripdjanov. "Results of geophysical methods in the study of the ancient settlement Dalvarzintepa (Uzbekistan)." In Advances in On- and Offshore Archaeological Prospection, 611–20. Kiel: Universitätsverlag Kiel | Kiel University Publishing, 2023. http://dx.doi.org/10.38072/978-3-928794-83-1/p62.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
The purpose of the study was to use a variety of geophysical techniques to uncover the shape, size, internal structure, and contour of archaeological artifacts buried beneath the surface. Magnetic prospecting, electrical resistivity tomography, and ground penetrating radar were the three main geophysics techniques. Various abnormalities are clearly traced on the maps created from the processing results of all methods in the form of figures with different lengths and forms. Archaeologists were able to identify the most important excavation sites using geophysical study.
4

Köbler, Johannes, Sebastian Kuhnert, and Osamu Watanabe. "Interval Graph Representation with Given Interval and Intersection Lengths." In Algorithms and Computation, 517–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-35261-4_54.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Pinfield, Lawrence T. "Medium-Length Vacancy Chains." In The Operation of Internal Labor Markets, 105–38. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4899-1019-6_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Chan, K. L., S. Sofia, and H. G. Mayr. "Mixing-Length, Shears, and Differential Rotation." In The Internal Solar Angular Velocity, 347–60. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3903-5_35.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Forest, Samuel. "Micromorphic Approach to Materials with Internal Length." In Encyclopedia of Continuum Mechanics, 1–11. Berlin, Heidelberg: Springer Berlin Heidelberg, 2018. http://dx.doi.org/10.1007/978-3-662-53605-6_150-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Forest, Samuel. "Micromorphic Approach to Materials with Internal Length." In Encyclopedia of Continuum Mechanics, 1643–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-55771-6_150.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Unno, W. "Beyond the Mixing-Length Theory: A Turbulent Diffusivity Approach." In The Internal Solar Angular Velocity, 343–46. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3903-5_34.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Di Gesù, Vito, Giosuè Lo Bosco, and Luca Pinello. "Interval Length Analysis in Multi Layer Model." In Computational Intelligence Methods for Bioinformatics and Biostatistics, 114–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-02504-4_10.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Internal lengths":

1

Senecal, P. K., E. Pomraning, J. W. Anders, M. R. Weber, C. R. Gehrke, C. J. Polonowski, and C. J. Mueller. "Predictions of Transient Flame Lift-Off Length With Comparison to Single-Cylinder Optical Engine Experiments." In ASME 2013 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icef2013-19129.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
A state-of-the-art, grid-convergent simulation methodology was applied to three-dimensional calculations of a single-cylinder optical engine. A mesh resolution study on a sector-based version of the engine geometry further verified the RANS-based cell size recommendations previously presented by Senecal et al. [1]. Convergence of cylinder pressure, flame lift-off length and emissions was achieved for an adaptive mesh refinement cell size of 0.35 mm. Full geometry simulations, using mesh settings derived from the grid convergence study, resulted in excellent agreement with measurements of cylinder pressure, heat release rate and NOx emissions. On the other hand, the full geometry simulations indicated that the flame lift-off length is not converged at 0.35 mm for jets not aligned with the computational mesh. Further simulations suggested that the flame lift-off lengths for both the non-aligned and aligned jets appear to be converged at 0.175 mm. With this increased mesh resolution, both the trends and magnitudes in flame lift-off length were well predicted with the current simulation methodology. Good agreement between the overall predicted flame behavior and the available chemiluminescence measurements was also achieved. The present study indicates that cell-size requirements for accurate prediction of full geometry flame lift-off lengths may be stricter than those for global combustion behavior. This may be important when accurate soot predictions are required.
2

Kamaya, Masayuki. "A Plastic Collapse Assessment Procedure for Multiple Cracks Under Internal Pressure." In ASME 2011 Pressure Vessels and Piping Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/pvp2011-57584.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
The influence of the interaction between two surface cracks on the limit pressure was examined by finite element analysis. Longitudinal semi-elliptical surface cracks were assumed to be on a straight pipe that was subjected to internal pressure. The changes in limit pressure due to the relative spacing of cracks and the geometries of the cracks and pipe were investigated. The intensity of the interaction depended on the relative distance between the cracks as well as the pipe and crack geometries. In all cases, the maximum magnitude of the reduction in limit pressure was equivalent to twice the crack face area. Based on the results obtained, criteria for the combination rules the for plastic collapse analysis were proposed. Furthermore, it was concluded that the surface length of the combined cracks could be assumed to be equal to the sum of their lengths. The ligament length was not included.
3

Liu, Zengjie, and Lan Wang. "Wheel/Rail Dynamics Simulation for Optimising Minimum Grade Lengths to High-Speed Railways." In ASME/IEEE 2007 Joint Rail Conference and Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/jrc/ice2007-40107.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Based on the principle of no car vibrations interference when trains pass grade section from the end of front vertical curve to the start of latter vertical curve, using railway wheel/rail simulation NUCARS™ software, some dynamics simulation studies for minimum grade lengths on high speed railway lines were made. The dynamics simulation results show that, the minimum tangent lengths between vertical transition curves should be more than 0.43V in meters (V is speed of train, km/h). So the minimum length is 800 meters when the vertical curve radius is 25000 meters, and 900 meters when radius is 30000 meters for the Chinese Dedicated Passenger Railway lines (PDLs) on which maximum speed is 350 km/h and ruling gradient is 12‰.
4

Adibi-Asl, R., and R. Seshadri. "Decay Length in Pressure Vessels." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-66135.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
In theory of shell, decay length is defined as the distance affected by localized external (applied loads) or internal (edge effect, discontinuity) forces and moments, beyond which the effect of these loads becomes negligible. The concept of decay length becomes relevant when assessing the interaction effects caused by adjacent discontinuities. In this paper, the decay lengths for several shells geometries, specifically cylindrical, spherical and conical shells, are reviewed. The available expressions for decay lengths in the literature are listed and are compared with finite element analysis to demonstrate the accuracy of some of the solutions.
5

Simonovski, Igor, Marko Kovacˇ, and Leon Cizelj. "The Correlation Length: A Measure of Inhomogeneities in Polycrystalline Materials." In 12th International Conference on Nuclear Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/icone12-49603.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
This paper deals with the correlation length estimated from a mesoscopic model of a polycrystalline material. The correlation length can be used in some macroscopic material models as a material parameter that describes the internal length. It can be estimated directly from the strain and stress fields calculated from a finite-element model, which explicitly accounts for the selected mesoscopic features such as the random orientation, shape and size of the grains. The crystal plasticity material model was applied during the finite-element analysis. Different correlation lengths were obtained depending on whether the strain or the stress field was used. The correlation lengths also changed with the macroscopic load. While the load is below the yield strength the correlation lengths are constant, and of the order of the average grain size. Increasing the load above the yield strength creates shear bands that temporarily increase the values of the correlation lengths calculated from the strain fields. With a further load increase the correlation lengths decrease slightly below the average grain size. The correlation lengths calculated from the stress field are smaller than the ones calculated from the strain field. However, with the exception of the load region where significant shear bands appear, both seem to follow the same qualitative rules.
6

Esfahanian, Vahid, Ehsan S. Sobhani, Mehrdad K. Elyasi, and Hamid Karbalaireza. "Predesign of an Internal Combustion Engine Intake Manifold by Numerical Solution of Induction Flow." In ASME 2003 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ices2003-0647.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
A method is proposed to calculate the characteristics of compressible flow in intake manifold of an internal combustion engine, which can be used as an iterative process to determine the main dimensions of the manifold, such as pipes length and diameter, at the primary stages of internal combustion engine design. To calculate the flow field in the pipes, a computer code has been developed to solve the quasi 1-D Euler’s gas dynamics equations using flux-splitting method. Boundary conditions, such as valves, are modeled using experimental data along with some semi-empirical equations. To verify the accuracy of the method, a four cylinder SI engine manifold, with different intake manifold pipe lengths is simulated by the developed computer code and the overall performance characteristics of the engine such as power, torque and volumetric efficiency are obtained and compared with experiments.
7

Pickett, Lyle M., and Dennis L. Siebers. "Orifice Diameter Effects on Diesel Fuel Jet Flame Structure." In ASME 2001 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/2001-ice-399.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Abstract The effects of orifice diameter on several aspects of diesel fuel jet flame structure were investigated in a constant-volume combustion vessel under heavy-duty, direct-injection (DI) diesel engine conditions using Phillips research grade #2 diesel fuel and orifice diameters ranging from 45 μm to 180 μm. The overall flame structure was visualized with time-averaged OH chemiluminescence and soot luminosity images acquired during the quasi-steady portion of the diesel combustion event that occurs after the transient premixed burn is completed and the flame length is established. The lift-off length, defined as the farthest upstream location of high-temperature combustion, and the flame length were determined from the OH chemiluminescence images. In addition, relative changes in the amount of soot formed for various conditions were determined from the soot incandescence images. Combined with previous investigations of liquid-phase fuel penetration and spray development, the results show that air entrainment upstream of the lift-off length (relative to the amount of fuel injected) is very sensitive to orifice diameter. As orifice diameter decreases, the relative air entrainment upstream of the lift-off length increases significantly. The increased relative air entrainment results in a reduced overall average equivalence ratio in the fuel jet at the lift-off length and reduced soot luminosity downstream of the lift-off length. The reduced soot luminosity indicates that the amount of soot formed relative to the amount of fuel injected decreases with orifice diameter. The flame lengths determined from the images agree well with gas jet theory for momentum-driven, non-premixed turbulent flames.
8

Hunt, Alexander J., Alexander Graber-Tilton, and Roger D. Quinn. "Modeling Length Effects of Braided Pneumatic Actuators." In ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/detc2017-67458.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Braided pneumatic actuators (BPAs) are attractive for use in bio-robots because they offer many muscle-like properties, especially when compared to most other commercially available robotic actuators. Unfortunately, the same properties that make these actuators similar to muscles make them more difficult to control. One such actuator manufactured by Festo, the MXAM-10-AA, is frequently utilized in robotics because of its commercial availability, durability, and force capability. Although models for BPAs exist, the properties that make this actuator more durable also make its behavior less like other braided pneumatic actuators, especially for shorter actuator lengths. Length specific models that do exist for Festo fluidic muscles have numerous parameters that can only be found experimentally by taking hundreds to thousands of data points and performing a lengthy optimization process to fit parameter values for each actuator in the system. This lack of generalizability makes it difficult to build a new robot and begin testing new control systems without significant startup time and cost. The key contribution of this work is the development of a generalizable actuator model that accounts for the geometry and limitations of the actuator at shorter lengths. This empirical model relates internal pressure, strain, stretching or contracting state, and applied force on the MXAM-10-AA actuator. The model is scalable to different length actuators by measuring their resting length at zero pressure and their minimum contraction length at maximum air pressure, and can be used for feedforward length control. The model is evaluated on a robot leg with three joints and 6 actuators, each with different length. The developed controller, using the actuator model, controls the joints to within ± 3 degrees of the desired position for different desired torques only using internal actuator pressure feedback. We also demonstrate control speed by cycling a joint over 40 degrees of rotation at varying frequencies.
9

Gao, Yong-Jian, Shao-Dong Feng, Qing Yu, Bing-Bing Chen, Shao-Xuan Lin, and Zhai Zhang. "Study of Reactor Internal Bolt Behaviors Under Lateral Loads." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65087.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
In calculating the bolt stresses under lateral loads, such as caused by the differential thermal movement between two components — problems often found in the reactor internal design, the boundary condition of the bolt is usually conservatively assumed to be in a guided-cantilever beam mode, i.e., the bolt head is not allowed to rotate. In reality, the bolt head could rotate to a certain degree and, furthermore, the bolt head could slip, a form of loosening, under the lateral loads. A series of lateral load-deflection tests was conducted on bolts of different sizes and different lengths, with different preloads, to study the bolt behaviors, including when the bolts start to slip and what is the effect of preloading on the slippage. Furthermore, finite element studies were conducted to correlate the test results to find the proper boundary condition to be used in the bolt stress calculation.
10

Huse Knudsen, Tor, Svein Sævik, and Mats Jørgen Thorsen. "Numerical Analysis of Combined VIV and Slug Flow in Time Domain." In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/omae2016-54891.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Vortex induced vibrations (VIV) and slug flow are two important aspects for marine risers conveying a multiphase flow, and should be carefully examined due to the influence on the fatigue life of the structure. This article examines a truncated riser exposed to VIV with an internal two-phase slug flow. The main focus of the article was to examine the effect of internal slug flow on the VIV of a riser. The VIV were simulated in time domain with a linear structural model with constant pretension. Approximately 150 vortex shedding periods were simulated after the response reached steady state. An internal two-fluid flow was introduced, with constant internal velocity, pressure and uniform slug lengths. From the numerical study it was apparent that the slug velocity and slug length had an influence on the response pattern, amplitude and frequency. An analytical model that predicts additional response frequencies due to slug flow was also compared to the numerical studies. The analytical study produced similar additional response frequencies as the numerical study. The slug length and internal velocity can influence the response of the riser, and should be considered for marine risers conveying multiphase flow.

Reports on the topic "Internal lengths":

1

Williams. L51671 Criteria for Dent Acceptability of Offshore Pipelines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), July 1992. http://dx.doi.org/10.55274/r0010217.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Extensive research has provided an understanding in the behavior of pipelines subjected to mechanical damage. The presence of a gouge or the combination of a gouge and a dent has been proven detrimental to the burst strength of pipelines. The research has also revealed that plain smooth dents, in the absence of a defect, do not significantly reduce the burst strength of pipelines. On the other hand, plain dents locally increase the pipe stress due to pressure. Thus, fatigue failures from dents can occur from normal operating pressure fluctuations in the lines over a period of time This report documents the testing and analysis work done to establish the effects of pipeline dents (without gouges) under cyclic internal pressure loading. The work consisted of several sub-tasks. First, operators were surveyed regarding the expected dent shapes and failures from dents that had been experienced. Secondly, a full scale test program utilizing 12-3/4" pipe was carried out. In this program eight pipes, each 20" long with diameter/thickness ratios of 18-50, were subjected to three dents each of various sizes and pressure cycled until failure or until 50,000 to 70,000 equivalent cycles of 0 - 1200 psi pressure was achieved. Next, elastic finite element analysis was utilized to determine the significance of dent shapes and lengths. Finally plastic finite element analysis was utilized to determine analytically the stress to pressure ratios so that a fatigue analysis could be done.
2

Rosenkrantz, Walter A. Some Remarks on the Asymptotic Behaviour of the Lengths of a Collision Resolution Interval. Revision. Fort Belvoir, VA: Defense Technical Information Center, December 1985. http://dx.doi.org/10.21236/ada170264.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

He, Xihua. PR-015-113601-Z01 Enhancement and Validation of Internal Corrosion Threat Guidelines-Phase 1. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), January 2014. http://dx.doi.org/10.55274/r0010804.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
This study collected and analyzed more field data to enhance the probabilistic model for predicting internal corrosion threats in nominally dry natural gas pipelines developed previously, especially in the region where the internal corrosion risk is higher. The Excel� tool developed previously was also updated with the enhanced model for predicting internal corrosion risk based on basic operating conditions, (i.e., average gas operating temperature, seasonal gas operating temperature amplitude, and operating pressure). In this project, a general-purpose Excel tool was created to allow calculation of residual hydrotest water evaporation time for one or more liquid water pools located in low spots in the pipeline based on water volume, pipe low spot geometry, and gas flow conditions. Another Excel tool also was developed to predict water stream length when gas from the inlet branch line at higher temperature injects water stream into the main gas transmission pipeline and the time to reach steady state condition before the water is completely evaporated for many types of pipeline scenarios.
4

He, Xihua. PR015-183601-Z01 Enhancement of Internal Corrosion Threat Guidelines for Dry Natural Gas Pipelines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), July 2019. http://dx.doi.org/10.55274/r0011607.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
This study collected and analyzed more field data to enhance the probabilistic model for predicting internal corrosion threats in nominally dry natural gas pipelines developed previously, especially in the region where the internal corrosion risk is higher. The Excel� tool developed previously was also updated with the enhanced model for predicting internal corrosion risk based on basic operating conditions, (i.e., average gas operating temperature, seasonal gas operating temperature amplitude, and operating pressure). In this project, a general-purpose Excel tool was created to allow calculation of residual hydrotest water evaporation time for one or more liquid water pools located in low spots in the pipeline based on water volume, pipe low spot geometry, and gas flow conditions. Another Excel tool also was developed to predict water stream length when gas from the inlet branch line at higher temperature injects water stream into the main gas transmission pipeline and the time to reach steady state condition before the water is completely evaporated for many types of pipeline scenarios.
5

Lutz, Carsten. Interval-based Temporal Reasoning with General TBoxes. Aachen University of Technology, 2000. http://dx.doi.org/10.25368/2022.109.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Aus der Motivation: Description Logics (DLs) are a family of formalisms well-suited for the representation of and reasoning about knowledge. Whereas most Description Logics represent only static aspects of the application domain, recent research resulted in the exploration of various Description Logics that allow to, additionally, represent temporal information, see [4] for an overview. The approaches to integrate time differ in at least two important aspects: First, the basic temporal entity may be a time point or a time interval. Second, the temporal structure may be part of the semantics (yielding a multi-dimensional semantics) or it may be integrated as a so-called concrete domain. Examples for multi-dimensional point-based logics can be find in, e.g., [21;29], while multi-dimensional interval-based logics are used in, e.g., [23;2]. The concrete domain approach needs some more explanation. Concrete domains have been proposed by Baader and Hanschke as an extension of Description Logics that allows reasoning about 'concrete qualities' of the entities of the application domain such as sizes, length, or weights of real-worlds objects [5]. Description Logics with concrete domains do usually not use a fixed concrete domain; instead the concrete domain can be thought of as a parameter to the logic. As was first described in [16], if a 'temporal' concrete domain is employed, then concrete domains may be point-based, interval-based, or both.
6

Oliynyk, Kateryna, and Matteo Ciantia. Application of a finite deformation multiplicative plasticity model with non-local hardening to the simulation of CPTu tests in a structured soil. University of Dundee, December 2021. http://dx.doi.org/10.20933/100001230.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
In this paper an isotropic hardening elastoplastic constitutive model for structured soils is applied to the simulation of a standard CPTu test in a saturated soft structured clay. To allow for the extreme deformations experienced by the soil during the penetration process, the model is formulated in a fully geometric non-linear setting, based on: i) the multiplicative decomposition of the deformation gradient into an elastic and a plastic part; and, ii) on the existence of a free energy function to define the elastic behaviour of the soil. The model is equipped with two bonding-related internal variables which provide a macroscopic description of the effects of clay structure. Suitable hardening laws are employed to describe the structure degradation associated to plastic deformations. The strain-softening associated to bond degradation usually leads to strain localization and consequent formation of shear bands, whose thickness is dependent on the characteristics of the microstructure (e.g, the average grain size). Standard local constitutive models are incapable of correctly capturing this phenomenon due to the lack of an internal length scale. To overcome this limitation, the model is framed using a non-local approach by adopting volume averaged values for the internal state variables. The size of the neighbourhood over which the averaging is performed (characteristic length) is a material constant related to the microstructure which controls the shear band thickness. This extension of the model has proven effective in regularizing the pathological mesh dependence of classical finite element solutions in the post-localization regime. The results of numerical simulations, conducted for different soil permeabilities and bond strengths, show that the model captures the development of plastic deformations induced by the advancement of the cone tip; the destructuration of the clay associated with such plastic deformations; the space and time evolution of pore water pressure as the cone tip advances. The possibility of modelling the CPTu tests in a rational and computationally efficient way opens a promising new perspective for their interpretation in geotechnical site investigations.
7

McInerney, Michael, Matthew Brenner, Sean Morefield, Robert Weber, and John Carlyle. Acoustic nondestructive testing and measurement of tension for steel reinforcing members. Engineer Research and Development Center (U.S.), October 2021. http://dx.doi.org/10.21079/11681/42181.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Many concrete structures contain internal post-tensioned steel structural members that are subject to fracturing and corrosion. The major problem with conventional tension measurement techniques is that they use indirect and non-quantitative methods to determine whether there has been a loss of tension. This work developed an acoustics-based technology and method for making quantitative tension measurements of an embedded, tensioned steel member. The theory and model were verified in the laboratory using a variety of steel rods as test specimens. Field tests of the method were conducted at three Corps of Engineers dams. Measurements of the longitudinal and shear velocity were done on rods up to 50 ft long. Not all rods of this length were able to be measured and the quality and consistency of the signal varied. There were fewer problems measuring the longitudinal velocity than shear velocity. While the tension predictions worked in the laboratory tests, the tension could not be accurately calculated for any of the field sites because researchers could not obtain the longitudinal or shear velocities in an unstressed state, or precise measurements of the longitudinal and shear velocities due to the unknown precise length of the rods in the tensioned state.
8

Dechow, Chad Daniel, M. Cohen-Zinder, Morris Soller, Y. Tzfati, A. Shabtay, E. Lipkin, T. Ott, and W. Liu. Genotypes and phenotypes of telomere length in Holstein cattle, actors or reporters. Israel: United States-Israel Binational Agricultural Research and Development Fund, 2020. http://dx.doi.org/10.32747/2020.8134156.bard.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
Selection programs aiming at improving health and survival in cattle are complicated by low heritability estimates, the fact that true herd life and carcass quality is not known until the end of an animal's life, and that many health conditions manifest late in life. Young animals are now heavily favored in breeding programs because low generation intervals accelerate the rate of genetic progress, which means selection decisions must be made before phenotypic observation of health and survival is feasible. Moreover, profitability is compromised when livestock producers raise animals that fail to produce due to health failure or that do not meet quality standards. Telomere length (TL) was hypothesized as a biomarker that could be recorded early in life, be associated with health and survival, and have higher heritability than other measures of health. Thus, our research aims were to: 1, determine associations of TL with health, wellbeing and production in Holsteins raised for dairy or beef purposes; 2, determine TL heritability, genetic variance, and genetic correlations with cow health and performance; and 3, map quantitative trait loci affecting TL and provide TL genomic predictions to industry partners and breeders. There were not significant changes made to the research plan during the project, but the timeline of the project was not met. Laboratory processing of samples was significantly delayed due to Covid along with some sample collection. TL measurements from >1100 animals across the US and Israel are available to date. TL declines modestly with age, in agreement with observations from other species. A genomic analysis was conducted using a single-step approach and TL had a moderate heritability estimate of 20% across age groups. The initial genome-wide association-analysis indicated that TL is a quantitative trait whose expression is influenced by effects across the genome. Moreover, there is a strong association of calf and dam TL at birth. Genetic relationships with health and survival were ascertained through correlations of genomic estimated breeding values (gEBV) for TL with gEBV for other traits routinely recording in national genetic evaluations. Higher TL is genetically associated with longer herd-life, a greater likelihood that cows will avoid premature on-farm death, and reduced disease incidence. The relationship appeared to be strongest when TL was measured during the first two years of life. Based on genotyping different cell types, there was evidence that maternal and colostral derived cells are present in newborns, which could bias TL measurements during the first weeks of life to a small degree. The implications of this research are that TL is a promising trait to include in multiple trait selection programs because it is heritable, available early in life, and correlated with longevity and health. Our TL reference population is currently being expanded, and genomic estimated breeding values will be disseminated to industry partners upon completion of the reference population so that they can evaluate the utility of incorporating TL into their breeding programs.
9

Moore, Gai, Anton du Toit, Brydie Jameson, Angus Liu, and Mark Harris. The effectiveness of virtual hospitals. The Sax Institute, January 2020. http://dx.doi.org/10.57022/lwxq3617.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
This Rapid Evidence Scan examined the effectiveness of virtual hospital models of care. While no reviews evaluated a complete model, tele-healthcare only and tele-healthcare with remote telemonitoring interventions demonstrated similar or significantly better clinical or health system outcomes including reduced hospitalisations, readmissions, emergency department visits and length of stay, compared to usual care, including those delivered without home visits or face-to-face care. The use of the Internet showed mixed but promising results. The strongest evidence was for cardiac failure, coronary heart disease, diabetes and stroke rehabilitation. Nurses played a central role in home visiting, providing telephone support and education. However, the studies were heterogeneous and the results should be interpreted with caution.
10

Gordon and Dong. L51648 Fitness-For-Purpose Assessment Procedures for Sleeve and Branch Welds in Pipelines. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), June 1991. http://dx.doi.org/10.55274/r0010215.

Full text
APA, Harvard, Vancouver, ISO, and other styles
Abstract:
�One of the major problems associated with developing fitness-for-purpose procedures for sleeve and branch welds is the prediction of the local stress distribution at the welds. Since the presence of a sleeve or branch will increase the local stiffness of the pipe and give rise to local stress concentration effects, the stress distribution at sleeve or branch welds cannot be readily estimated using simple stress analysis. This project studied the structural behavior of sleeve and branch connections in pipelines. Because these connections create local stress concentration effects, where several potential crack orientations need to be considered, the stress distribution at these points cannot be estimated using simple stress analysis. In this research, finite element analyses were performed to determine: (1) the local stress distribution resulting from internal pressure and remotely-applied tensile and bending loads at sleeve and branch welds; (2) the effects of sleeve thickness and length; (3) the effect of poor fits (i.e., gaps between the pipe and sleeve); and (4) the effect of a through-wall crack at sleeve and branch welds in pressurized pipe.

To the bibliography