Relevant bibliographies by topics / Modèle PITM

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  2. Dissertations / Theses
  3. Books
  4. Book chapters
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  6. Reports

Academic literature on the topic 'Modèle PITM'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

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Journal articles on the topic "Modèle PITM"

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Teckchandani, Anjali, Natalie Toida, Jake Goodchild, Christine Henderson, Julian Watts, Bernd Wollscheid, and Jonathan A. Cooper. "Quantitative proteomics identifies a Dab2/integrin module regulating cell migration." Journal of Cell Biology 186, no. 1 (July 6, 2009): 99–111. http://dx.doi.org/10.1083/jcb.200812160.

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Clathrin-associated endocytic adapters recruit cargoes to coated pits as a first step in endocytosis. We developed an unbiased quantitative proteomics approach to identify and quantify glycoprotein cargoes for an endocytic adapter, Dab2. Surface levels of integrins β1, α1, α2, and α3 but not α5 or αv chains were specifically increased on Dab2-deficient HeLa cells. Dab2 colocalizes with integrin β1 in coated pits that are dispersed over the cell surface, suggesting that it regulates bulk endocytosis of inactive integrins. Depletion of Dab2 inhibits cell migration and polarized movement of integrin β1 and vinculin to the leading edge. By manipulating intracellular and surface integrin β1 levels, we show that migration speed correlates with the intracellular integrin pool but not the surface level. Together, these results suggest that Dab2 internalizes integrins freely diffusing on the cell surface and that Dab2 regulates migration, perhaps by maintaining an internal pool of integrins that can be recycled to create new adhesions at the leading edge.
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Yidong, Xu. "Use of time series models to forecast the evolution of corrosion pit in steel rebars." Functional materials 23, no. 3 (September 27, 2016): 457–62. http://dx.doi.org/10.15407/fm23.03.457.

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Zhang, Fa Yun. "Simulation Research on Optical Performance of Multicrystalline Silicon Texture Structure." Applied Mechanics and Materials 599-601 (August 2014): 99–102. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.99.

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The finite element model of double etching pits was established, optical performance of multicrystalline silicon wafer before and after etching was simulated by RF MODULE of COMSOL Multiphysics version 3.5a. Optical characteristic of unetching wafer and acidic textured were compared. It is indicates that acidic textured (double etching pits) has low reflectivity, high power flow Y component , the better light trapping. When the wavelength is 600nm, the maximum and minimum value of surface electric field Z component of acidic textured are 1.9 times and 1.4 times respectively than that of unetching wafer, and two extremum value of surface magnetic field Z component are 2.1 times and 1.9 times respectively than that of unetching wafer. Numerical simulation results of Multi hole model are closely with experimental values, which can guide the practical production.
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Tlemçani, M. K., L. Ait Brahim, and B. Tardieu. "In situ measurement of CBR concrete modulus.Choice of the type of dam in morocco (static loads and earthquake cases)." MATEC Web of Conferences 149 (2018): 02085. http://dx.doi.org/10.1051/matecconf/201814902085.

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The Young's modulus of roller compacted concrete is rarely measured. However, it has a direct influence on the dam behavior and especially for static loads during earthquakes. In many cases, static and dynamic calculations are done with modules copied from other study. This dam was studied using in situ module measurements that contribute to a choice of the type of dam and the choice and the choice of materials from borrow pits near the dam.
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Choi, Sungil, Jaehoon Cho, Wonil Song, Jihwan Choe, Jisung Yoo, and Kwanghoon Sohn. "Pyramid Inter-Attention for High Dynamic Range Imaging." Sensors 20, no. 18 (September 7, 2020): 5102. http://dx.doi.org/10.3390/s20185102.

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This paper proposes a novel approach to high-dynamic-range (HDR) imaging of dynamic scenes to eliminate ghosting artifacts in HDR images when in the presence of severe misalignment (large object or camera motion) in input low-dynamic-range (LDR) images. Recent non-flow-based methods suffer from ghosting artifacts in the presence of large object motion. Flow-based methods face the same issue since their optical flow algorithms yield huge alignment errors. To eliminate ghosting artifacts, we propose a simple yet effective alignment network for solving the misalignment. The proposed pyramid inter-attention module (PIAM) performs alignment of LDR features by leveraging inter-attention maps. Additionally, to boost the representation of aligned features in the merging process, we propose a dual excitation block (DEB) that recalibrates each feature both spatially and channel-wise. Exhaustive experimental results demonstrate the effectiveness of the proposed PIAM and DEB, achieving state-of-the-art performance in terms of producing ghost-free HDR images.
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Hanauer, David I., Justin Nicholes, Fang-Yu Liao, Aaron Beasley, and Heather Henter. "Short-Term Research Experience (SRE) in the Traditional Lab: Qualitative and Quantitative Data on Outcomes." CBE—Life Sciences Education 17, no. 4 (December 2018): ar64. http://dx.doi.org/10.1187/cbe.18-03-0046.

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The San Diego Biodiversity Project introduces undergraduate students at four different 2- and 4-year schools to a short-term research experience (SRE) that was implemented as a module in the last third of a traditional laboratory course. The study assesses the qualities of this SRE for students using three different methods. Twenty-one participants were interviewed about their experiences in the traditional and research components of their course. In a repeated-measures design, 124 participants took the Persistence in the Sciences (PITS) survey immediately before and after their participation in the SRE. Finally, using a propensity score matching technique, PITS survey results for SRE students were compared with those for students in a course-based research experience (CRE). Student perceptions of the traditional lab and the SRE are different—students appreciate learning basic processes and procedures in the traditional lab, but they express having personal investment in and a sense of participating in science in the SRE. Significant increases were found for the variable of Project Ownership in the SRE condition over the traditional lab, but SRE outcomes were lower than CRE outcomes. Although the SRE may not provide the benefits of a CRE, it is a serious option for expanding access to authentic research.
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Huang, Jin, Ratna Ghosh, Ashutosh Tripathi, Max Lönnfors, Pentti Somerharju, and Vytas A. Bankaitis. "Two-ligand priming mechanism for potentiated phosphoinositide synthesis is an evolutionarily conserved feature of Sec14-like phosphatidylinositol and phosphatidylcholine exchange proteins." Molecular Biology of the Cell 27, no. 14 (July 15, 2016): 2317–30. http://dx.doi.org/10.1091/mbc.e16-04-0221.

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Lipid signaling, particularly phosphoinositide signaling, plays a key role in regulating the extreme polarized membrane growth that drives root hair development in plants. The Arabidopsis AtSFH1 gene encodes a two-domain protein with an amino-terminal Sec14-like phosphatidylinositol transfer protein (PITP) domain linked to a carboxy-terminal nodulin domain. AtSfh1 is critical for promoting the spatially highly organized phosphatidylinositol-4,5-bisphosphate signaling program required for establishment and maintenance of polarized root hair growth. Here we demonstrate that, like the yeast Sec14, the AtSfh1 PITP domain requires both its phosphatidylinositol (PtdIns)- and phosphatidylcholine (PtdCho)-binding properties to stimulate PtdIns-4-phosphate [PtdIns(4)P] synthesis. Moreover, we show that both phospholipid-binding activities are essential for AtSfh1 activity in supporting polarized root hair growth. Finally, we report genetic and biochemical evidence that the two-ligand mechanism for potentiation of PtdIns 4-OH kinase activity is a broadly conserved feature of plant Sec14-nodulin proteins, and that this strategy appeared only late in plant evolution. Taken together, the data indicate that the PtdIns/PtdCho-exchange mechanism for stimulated PtdIns(4)P synthesis either arose independently during evolution in yeast and in higher plants, or a suitable genetic module was introduced to higher plants from a fungal source and subsequently exploited by them.
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Guo, Li Bin, Feng Long Yao, Zhi Hang Zhang, and Yun Fei Duan. "Innovative Algorithm and Software for Three-Dimension Topography Evaluation in Laser-Micro Machining." Applied Mechanics and Materials 789-790 (September 2015): 853–60. http://dx.doi.org/10.4028/www.scientific.net/amm.789-790.853.

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Innovative algorithms and software evaluating the three-dimension topography in laser micro-machining are developed in this paper. First according to the features of the three-dimension surface consisted of micro peaks and pits, Gaussian curve parameters are presented and used to form a evaluation system with 22 parameters for three-dimension topography. Based on this, to completely and precisely evaluate the three-dimension topography,an assessment module for power spectral density is designed and implemented. Through integrating this module with the 22 parameters, a complete and precise evaluation system is built, which can evaluate the performance not only in vertical direction but also in horizontal is obtained. In software, through using MATLAB/GUI latest interface to implement integration, the following functions are implemented: surface three-dimension topography rebuilding, signal noise reducing, assessment data extracting, roughness calculating, and two-dimensional frequency domain analyzing. Furthermore, with this software, through comparing the parameters and spectrum, it is easy to determine the frequency affecting the roughness,thus providing some clues on how to further reduce the surface roughness. Test results show that this software system can provide more accurate assessment for the surfac three-dimension topography, and can be used to ultra-precision machining surface assessment.
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Amutha Priya, N., S. Sahaya Sathesh Raj, K. Siva, R. Vetha Jebarson, and P. Vignesh. "Performance Analysis of Smart Stick Designed for Visually Impaired People Using GSM and GPS." Asian Journal of Engineering and Applied Technology 10, no. 1 (May 5, 2021): 8–12. http://dx.doi.org/10.51983/ajeat-2021.10.1.2721.

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Visual impairment burdens the people heavily in today’s fast-moving culture. Although there are several measures for this impairment, many people skip such chances in fear of their economic condition. In view of helping those people, a sophisticated stick is designed using sensors like ultrasonic sensor, IR sensor and Arduino ICs. Electronically designed walking stick helps to trace the locations using GPS module and to avoid collisions through detection of objects at a certain range of distance from the person in all directions. Sensor placed beneath the bottom of the stick enables the identification of pits/hindrances on the ground. The visually impaired person will be alerted with a voice message generated using the voice recorder which records the response of all the sensors operating in different tracks. In this paper, GSM and sensors together have initiated the role of smart walking stick in the life of several human kinds.
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Nelson, Robert K., Christoph Aeppli, Catherine A. Carmichael, and Christopher M. Reddy. "High Resolution Forensic Analysis Of Surface Sheens Helps Pinpoint Source Of Oil Leakage From The Deepwater Horizon." International Oil Spill Conference Proceedings 2014, no. 1 (May 1, 2014): 300290. http://dx.doi.org/10.7901/2169-3358-2014-1-300290.1.

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Alkenes commonly found in synthetic drilling-fluids were used to identify sources of oil sheens that were first observed in September 2012 close to the Deepwater Horizon (DWH) disaster site more than two years after the Macondo MC-252 well was sealed. Exploration of the sea floor by BP confirmed that the well was capped and sound. BP scientists and engineers identified the likely source as leakage from an 80-ton cofferdam abandoned during a failed attempt to control the Macondo well in May 2010. We acquired and analyzed sheen samples at the sea-surface above the Deepwater Horizon wreckage as well as oil collected directly from the cofferdam using comprehensive two-dimensional gas chromatography (GC×GC). This allowed the identification of drilling-fluid C16- to C18-alkenes in sheen samples that were absent in cofferdam oil. Furthermore, the spatial pattern of evaporative losses of sheen oil alkanes indicated that oil surfaced closer to the Deepwater Horizon wreckage than the abandoned cofferdam site. Lastly, ratios of alkenes and petroleum hydrocarbons pointed to a common source of oil found in both sheen samples and recovered from oil-coated Deepwater Horizon riser pipe buoyancy compensator module debris collected shortly after the explosion. These lines of evidence suggest that the observed sheens do not originate from the Macondo well, cofferdam, or from natural seeps. Rather, the likely source is oil trapped in tanks and pits on the Deepwater Horizon wreckage, representing a finite oil leakage volume.
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Dissertations / Theses on the topic "Modèle PITM"

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Fadai-Ghotbi, Atabak. "Modélisation de la turbulence en situation instationnaire par approches URANS et hybride RANS-LES : prise en compte des effets de paroi par pondération elliptique." Phd thesis, Université de Poitiers, 2007. http://tel.archives-ouvertes.fr/tel-00163592.

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L'objectif de ce travail est de prendre en compte les instationnarités naturelles à grande échelle dans les écoulements décollés et à un coût plus faible que la LES, tout en s'intéressant à la modélisation des effets de paroi par des modèles statistiques au second ordre. S'inspirant des approches de Durbin, le modèle à pondération elliptique EB-RSM reproduit l'effet non-local de blocage, en résolvant une équation différentielle sur le terme de pression. La limite à deux composantes de la turbulence est bien prédite en canal. Ce modèle est appliqué à la marche descendante, dans une approche URANS. Nous avons montré que les erreurs numériques peuvent être suffisantes pour exciter le mode le plus instable de la couche cisaillée, et aboutir à une solution instationnaire. La solution est stationnaire quand on raffine le maillage, rendant l'URANS peu fiable. Récemment, Schiestel \& Dejoan ont proposé le modèle hybride non-zonal PITM. Le coefficient $C_{\e_2}$ de l'équation de la dissipation devient fonction de la coupure dans le spectre, et la valeur $C_{\e_1}=3/2$ est déduite par ces auteurs. Nous avons donné une formulation plus générale où la valeur de $C_{\e_1}$ est quelconque. Pour offrir un formalisme plus cohérent aux modèles hybrides non-zonaux dans les écoulements de paroi, une approche basée sur un filtrage temporel est proposée. Enfin, l'adaptation du modèle EB-RSM dans un cadre hybride a été réalisée. Les résultats en canal sont encourageants : la transition continue d'un modèle RANS en proche paroi à une LES au centre du canal est mise en évidence. Le transfert d'énergie des échelles modélisées vers celles résolues est bien reproduit quand on raffine le maillage.
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Amankwah, Henry. "Mathematical Optimization Models and Methods for Open-Pit Mining." Doctoral thesis, Linköpings universitet, Optimeringslära, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-70844.

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Open-pit mining is an operation in which blocks from the ground are dug to extract the ore contained in them, and in this process a deeper and deeper pit is formed until the mining operation ends. Mining is often a highly complex industrial operation, with respect to both technological and planning aspects. The latter may involve decisions about which ore to mine and in which order. Furthermore, mining operations are typically capital intensive and long-term, and subject to uncertainties regarding ore grades, future mining costs, and the market prices of the precious metals contained in the ore. Today, most of the high-grade or low-cost ore deposits have already been depleted, and to obtain sufficient profitability in mining operations it is therefore today often a necessity to achieve operational efficiency with respect to both technological and planning issues. In this thesis, we study the open-pit design problem, the open-pit mining scheduling problem, and the open-pit design problem with geological and price uncertainty. These problems give rise to (mixed) discrete optimization models that in real-life settings are large scale and computationally challenging. The open-pit design problem is to find an optimal ultimate contour of the pit, given estimates of ore grades, that are typically obtained from samples in drill holes, estimates of costs for mining and processing ore, and physical constraints on mining precedence and maximal pit slope. As is well known, this problem can be solved as a maximum flow problem in a special network. In a first paper, we show that two well known parametric procedures for finding a sequence of intermediate contours leading to an ultimate one, can be interpreted as Lagrangian dual approaches to certain side-constrained design models. In a second paper, we give an alternative derivation of the maximum flow problem of the design problem. We also study the combined open-pit design and mining scheduling problem, which is the problem of simultaneously finding an ultimate pit contour and the sequence in which the parts of the orebody shall be removed, subject to mining capacity restrictions. The goal is to maximize the discounted net profit during the life-time of the mine. We show in a third paper that the combined problem can also be formulated as a maximum flow problem, if the mining capacity restrictions are relaxed; in this case the network however needs to be time-expanded. In a fourth paper, we provide some suggestions for Lagrangian dual heuristic and time aggregation approaches for the open-pit scheduling problem. Finally, we study the open-pit design problem under uncertainty, which is taken into account by using the concept of conditional value-atrisk. This concept enables us to incorporate a variety of possible uncertainties, especially regarding grades, costs and prices, in the planning process. In real-life situations, the resulting models would however become very computationally challenging.
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VIENJIPURAM, KRISHNA KUMARAN, and ASMEER BABU ABDUL. "Improving the Quality of Multicast Networks by Using the OPNET Modeler." Thesis, Blekinge Tekniska Högskola, Sektionen för datavetenskap och kommunikation, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-2432.

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This thesis presents different Internet Protocol (IP) multicasting design models and together with their implementation methods in OPNET Modeler 14.5. The models presented in this report are designed for handling various types of advanced multimedia applications and services when using the multicast communication paradigm. The architectural models presented in this thesis are independent of the routing protocols used as well as of the underlying networking environment. Several exiting challenges related to high bandwidth requirements, low network delay, and jitter are discussed together with these design models, and are simulated using the OPNET Modeler. The emerging demands for new multicast capable applications, for both real-time and non real-time traffic are considered together in this report in order to better evaluate multicast traffic requirements. Efficient routing methods, group management policies, and shortest path algorithms are also discussed in the proposed models. The pros and cons of IP multicasting are described using the Protocol Independent Multicast Sparse Mode (PIM-SM) method, in the highlight of the proposed design models. Several results related to link utilization, end-to-end delay, packet loss, PIM control traffic, Internet Group Management Protocol (IGMP), and network convergence are obtained by using already available statistical methods and modules from OPNET Modeler. Our major contribution with this thesis work relates to components associated with network convergence, routing delay, and processing delay. These components are illustrated in this thesis using various OPNET metrics. Moreover, several issues related to protocol scalability, supportability, performance optimization and efficiency are also presented by using OPNET’s build in reports, i.e., executive flow and survivability analysis reports.
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Diouani, Sara. "Implication de PiT1 dans l’apoptose induite par le TNF-α dans des modèles in vivo et in vitro." Thesis, Paris 5, 2013. http://www.theses.fr/2013PA05T036.

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PiT1/SLC20A1 a été identifiée pour la première fois comme récepteur rétroviral, puis de nombreuses autres études réalisées in vitro ont permis de révéler ces différentes fonctions. PiT1 est notamment un transporteur de phosphate-sodium dépendant. Par le biais de cette activité de transporteur de phosphate inorganique (Pi), PiT1 est impliqué dans plusieurs processus cellulaires comme la minéralisation osseuse, la calcification vasculaire (dans certaines pathologies), et la réabsorption rénale et intestinale de Pi. Dans notre laboratoire, afin de mieux caractériser les fonctions physiologiques de PiT1, un Knock Out (KO) total pour cette protéine a été généré. Les souris présentent un phénotype létal embryonnaire et une atteinte hépatique. Au vu de ces résultats, d’autres études, réalisées dans le laboratoire, ont mis en évidence l’implication de PiT1 dans la prolifération et l’apoptose cellulaire. Ces fonctions nouvellement décrites sont spécifiques à PiT1 et indépendantes de sa fonction de transporteur de Pi.Les objectifs majeurs de mon travail de thèse ont consisté à mieux comprendre le rôle de PiT1 dans les mécanismes apoptotiques déclenchés par le TNF-α. Pour cela, j’ai étudié la cascade d’activation du TNF-α dans les cellules Hela exprimant de manière stable un shPiT1 ou un shScramble. En effet, mes résultats suggèrent que l’association de TRAF2 ; un élément clé de l’activation de la voie des MAPKs ; à PiT1 par le bisais de sa large boucle intracellulaire, permettrait la dissociation des kinases en amont de la voie des MAPKs, GCK (MAP4K) et MLK3 (MAP3K), induisant leur désactivation et ainsi la régulation négative de JNK. La désactivation de JNK induit à son tour à l’inhibition des caspases et donc la signalisation apoptotique. Par ailleurs, j’ai montré que la suractivation de JNK dans les cellules invalidées pour PiT1 corrèle avec la dissocition antérieur du complexe TRAF2-cellular Inhibitor of Apoptosis Proteins (cIAPs). Ainsi, le complexe pro-apoptotique formé de la caspase-8, la protéine FAS-Associated via Death Domaine (FADD) et du Receptor Interactinf Protein 1 (RIP1) était plus actif.Par ailleurs, la boucle PiT1 et la boucle PiT2 ; son homologue ; ont été échangées, permettant ainsi l’obtention des protéines chimères P2-BclP1 et P1-BclP2. Celles-ci représenteraient des outils intéressants pour mieux comprendre les mécanismes cellulaires engagés dans cette voie apoptotique. Enfin, le rôle de PiT1 dans l’apoptose induite par le TNF-α étudié dans des modèles cellulaires a été confirmé dans deux modèles murins faisant ainsi et pour la première fois un lien entre PiT1 et une pathologie inflammatoire, l’hépatite fulminante. Ces résultats montrent que l’absence de PiT1 sensibilise le foie à l’apoptose; à l’appui d’autres résultats ; PiT1 pourrait être considéré comme une cible thérapeutique dans des pathologies inflammatoires et cancéreuses
PiT1/SLC20A1 was identified for the first time as retroviral receptor then phosphate inorganic-dependent sodium transporter activity. Through this more a function of phosphate inorganic (Pi) transporter, PiT1 is involved in multiple cellular processes such as bone mineralization, vascular calcification, renal and intestinal reabsorption of Pi. In our laboratory, a total mice Knock Out (KO) for this gene encoding for PiT1 was generated to characterize its physiological functions. The embryonic mice PiT1 KO have a lethal phenotype through liver damage. We have previously found that additional transport-independent functions. PiT1 is involeved in proliferation and in the regulation of tumour necrosis factor (TNF)-induced apoptosis. Modulated cells was mediated by an increased activation of c-Jun N-terminal Kinase (JNK).The aim of my study was to define the role of PiT1 in apoptotic mechanisms of TNF-α signaling. For that, I have studied the regulation cascade of TNF-α pathway in Hela cells expressing shPiT1 or shScramble. My results suggest that intra-cytoplasmic loop domain of PiT1 was interact with TRAF2 ; a key element in the MAPK pathway activation. Furthermore, we also have shown that TNF-induced association of two JNK upstream kinases (Germinal Centre Kinase (GCK or MAP4K) and Mixed Lineage Kinase 3 (MLK3 or MAP3K) to PiT1 suggesting that PiT1 inducing their deactivation and thus down-regulation of JNK. Furthermore, we have shown that JNK increased signalling in PiT1-depleted cells correlates with the earlier dissociation of TRAF2 – cellular Inhibitor of Apoptosis Proteins (cIAPs) complexes. Thus, the apoptotic complex formed by caspase-8, Fas-Associated protein via Death Domain (FADD) and Receptor Interacting Protein 1 (RIP1) was more effectively activated. Moreover, PiT1 and PiT2 loops, were exchanged, thus allowing obtaining chimeric proteins BclP1-P2 and P1-BclP2. These proteins represent valuable tools to explore the mechanisms involved in the apoptotic pathway. Finally, we confirmed the relevance of these observations in vitro and showed that PiT1 gene conditional deletion in the liver of adult mice increases their sensitivity to fulminant hepatitis TNF-induced. These results are the first report of the involvement of PiT1 in a fatal pathology
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Legrand, Nathalie. "Modèle multiphysique et méthodes d'analyse in-situ, non destructives, qualitatives et quantitatives de diverses sources de vieillissement d'accumulateurs lithium-ion." Thesis, Université de Lorraine, 2013. http://www.theses.fr/2013LORR0240.

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L'optimisation de la durée de vie d'une batterie nécessite la prédiction de son vieillissement et donc l'identification des mécanismes de vieillissement qui en sont à l'origine. Pour pallier les limitations des outils de caractérisation du vieillissement classiquement utilisés (mesures intermittentes de performance au cours du vieillissement et tests de caractérisation post-mortem), des outils d'étude non destructive de l'état des électrodes en cours de vie ont été mis au point et testés. Il s'agit d'un modèle multiphysique de fonctionnement de la batterie lithium-ion et de deux méthodes d'extraction de paramètres in-situ : la première basée sur le traitement de la dérivée du profil de tension et la seconde sur la différence des pentes de profils de tension entre l'état neuf et l'état considéré. Les paramètres non disponibles mais nécessaires à l'établissement du modèle multiphysique d'un élément ont été estimés pour différents états de charge et différentes températures. Ce modèle a été validé par comparaison avec des mesures expérimentales. L'application de ces outils est illustrée dans le cas de trois mécanismes de vieillissement différents. En outre, ces outils ont été plus particulièrement appliqués au vieillissement par dépôt de lithium. L'utilisation du modèle de l'élément commercial VL41M Saft a permis de dresser un abaque de ses courants limites de fonctionnement et a fait l'objet d'une validation expérimentale mettant en oeuvre la méthode dite de la dérivée
Optimisation of a battery life time requires the prediction of its ageing and the identification of the involved ageing mechanisms. In order to avoid the limitations due to standard ageing characterisation methods (performance evaluations conducted regularly along ageing and post-mortem characterisations), other tools allowing assessment of the electrode state without deterioration along the life time, have been tested. It concerns a multiphysic model of lithium-ion battery and two methods for in-situ parameter extraction: the first is based on the study of the derivative of the tension profile and the second one, on the difference between the slope of the tension profiles at the fresh state and at the considered state. The non-available parameters required for set up of the multiphysic model for one battery have been evaluated for different states of charge and various temperatures. This model has been validated by comparison with experimental measurements. The application of these tools is illustrated for three different ageing mechanisms. Moreover these methods have been especially applied for the case of lithium plating ageing. Use of the VL41M Saft model allowed to set up an abacus of the limiting charge currents and an experimental validation has been performed in using the method so-called derivation method
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Engsner, Hampus. "A PIT - Based approach to Validation of Electricity Spot Price Models." Thesis, KTH, Matematisk statistik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172996.

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The modeling of electricity spot prices is still in its early stages, with various different competing models being proposed by different researchers. This makes model evaluation and comparison research an important area, for practitioners and researchers alike. However, there is a distinct lack in the literature of consensus regarding model evaluation tools to assess model validity, with different researchers using different methods of varying suitability as validation methods. In this thesis the current landscape of electricity spot price models and how they are currently evaluated is mapped out. Then, as the main contribution this research aims to make, a general and flexible framework for model validation is proposed, based on the Probability Integral Transform (PIT). The probability integral transform, which can be seen as a generalization of analyzing residuals in simple time series and regression models, transforms the realizations of a time series into independent and identically distributed U(0,1) variables using the conditional distributions of the time series. Testing model validity is with this method reduced to testing if the PIT values are independent and identically distributed U(0,1) variables. The thesis is concluded by testing spot price models of varying validity according to previous research using this framework against actual spot price data. These empirical tests suggest that PIT-based model testing does indeed point us toward the more suitable models, with especially unsuitable models being rejected by a large margin.
Modelleringen av spotpriser på el är fortfarande i ett tidigt stadium, med många olika modeller som förespråkas av olika forskare. Detta innebär att forskning som fokuserar på modellutvärdering och jämförelse är viktig både för berörda parter i näringslivet och forskare inom detta område. Det finns dock en klar brist på konsensusmetoder att utvärdera modellers validitet, då olika forskare förespråkar olika metoder av varierande lämplighet som valideringsverktyg. I den här uppsatsen kartläggs det nuvarande landskapet av spotprismodeller och de metoder som används för att utvärdera dem. Sedan, som det huvudsakliga forskningsbidraget av detta arbete, presenteras ett generellt och flexibelt valideringsramverk som baseras på vad som kallas ”Probability Integral Transform” (PIT). PIT, vilken kan ses som en generalisering av att undersöka residualer i enkla tidsserie- och regressionsmodeller, transformerar utfallet av en tidsserie till oberoende och identiskt fördelade U(0,1) variabler med hjälp av tidsseriens betingade fördelningar. Att testa modellens validitet reduceras med denna metod till att testa om PIT – värdena är oberoende och identiskt fördelade U(0,1) variabler. Uppsatsen avslutas med tester av spotprismodeller av varierande validitet enligt litteraturen med hjälp av detta ramverk mot faktiskt spotprisdata. De empiriska testerna antyder att PIT – baserad modellvalidering faktiskt stämmer överrens med modellers validitet baserat på nuvarande konsensus, där särskilt opassande modeller förkastas med stora marginaler.
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Schwerdtle, Hartwig. "Prozessintegriertes Management - PIM : ein Modell für effizientes Qualitäts-, Umwelt- und Arbeitsschutzmanagement /." Berlin : Springer, 1999. http://aleph.unisg.ch/hsgscan/hm00006710.pdf.

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Sydlik, Andrew J. "Pathology and Pity: The Interdependence of Medical and Moral Models of Disability in Nineteenth-Century American Literature." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1587476303532943.

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Plym, Forshell Linus. "Assessment of therapeutic targets in experimental models of Myc-induced lymphoma." Doctoral thesis, Umeå universitet, Institutionen för molekylärbiologi (Teknisk-naturvetenskaplig fakultet), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-46534.

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The Myc transcription factor activates expression of genes that promote cellular functions such as proliferation and cell growth. The deregulated Myc expression, characteristic for the tumor cell, also activates apoptosis, which selects for additional genetic changes deactivating the induced cell death. However, the continuous overexpression of Myc can also be a liability for a tumor, which can be taken advantage of in cancer treatment.  In Paper I, we describe a new way of using the DNA methyltransferase inhibitor Decitabine, in treating Myc overexpressing tumors. We show that Decitabine treatment activates cell death by reactivating silenced tumor suppressors such as Puma, but also by inducing DNA damage. Decitabine treatment of Myc driven lymphomas is also shown to prolong disease free survival in mouse models. Myc driven transformation requires a collaborative deregulation of genes. The family of Pim kinases has been shown to collaborate with Myc in tumorigenesis. In Paper II, we show that the Pim-3 kinase protein is highly expressed in many Myc overexpressing lymphomas from Myc transgenic mice as well as human Burkitt Lymphoma samples. The Pim-3 locus is shown to interact with the Myc protein and be a direct target for Myc activated transcription. Additionally, we demonstrate that the Pim kinase inhibitor, Pimi, targeting the Pim kinase family (Pim-1, Pim-2 and Pim-3), induce a cell death that is mediated by, but not dependent on caspase activity. The Pimi induced cell death was potentiated when combined with RNAi knockdown of the casein kinase II (CK2) protein.  In paper III, we describe the development of a somatic mouse model for lymphomagenesis, utilizing the RCAS-tva technology. We show that primary B cells from these mice are transducible and transformed when infected with a combination of RCAS- HA tagged Myc, KRasV12D and human Bcl-XL virus. In conclusion, we show that the labile milieu created by the deregulated expression of Myc facilitates new approaches in treatment of Myc overexpressing tumors. Also, our new tva mouse model show promise in modeling lymphomagenesis.
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Nascimento, Wanessa da Costa, and 92-98403-5353. "Parque Eco-Industrial: uma análise de modelo conceitual para o Polo Industrial de Manaus - PIM." Universidade Federal do Amazonas, 2017. http://tede.ufam.edu.br/handle/tede/6035.

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The definition of an industrial eco-park can be given through a systematic set of companies that share resources or products seeking increased profitability with significantly reduced environmental impact. Its implementation can directly contribute to the consolidation of a sustainable economy, however, this real perspective and extensive scientific literature is still a challenge for any country, because there are several factors to be considered and made available for the realization of such project. Technical studies, society, politics, business and government aspirations are relevant parties in decision making and in sucessibilidade process. It is understood that the demands and competitive profiles of the current market, it becomes complex understanding that a sustainable industrial system is sufficient to produce a wide range of products and services, and further the various levels of production and supply chains . On the other hand, successful experiences are in full progress on industrial ecoparks, as we highlight the countries Denmark, the United States and Canada, and in this sense, this study will propose a conceptual model to reflect aspects and symbiotic relationships based on a methodology deductive method with analytical approach with literature and methodological manuals available in the last five years for the modeling concepts and industrial eco-park relationships, and symbiosis with close identification with the industrial Pole of Manaus. From these precepts will be observed if there are spontaneous symbiotic relationships between the 486 factories in the Manaus Free Trade Zone and the feasibility for the installation of an industrial eco park in the city of Manaus.
A definição de um ecoparque industrial - EIP poder ser dada por meio de um conjunto sistemático de empresas que compartilham recursos ou produtos buscando o aumento da rentabilidade com redução significativa do impacto ambiental. A sua implementação pode contribuir diretamente para a sedimentação de uma economia sustentável, entretanto, essa perspectiva real de literatura científica ainda é um desafio para qualquer país, pois são vários os fatores a serem considerados e postos à disposição para a efetivação desse tipo de projeto. Estudos técnicos, participação da sociedade, aspirações política, empresarial e governamental são partes relevantes na tomada de decisão bem como na sucessibilidade do processo. Entende-se que com as demandas e perfis competitivos do mercado atual, torna-se complexo o entendimento que um sistema industrial sustentável seja suficiente para produzir variados produtos e serviços, e ainda mais nos diversos níveis de produção e de cadeias de fornecimento. Por outro lado, experiências frutíferas estão em pleno progresso acerca dos ecoparques industriais, como se destacam os países Dinamarca, Estados Unidos e Canadá. Sendo assim, este estudo propõe um modelo conceitual para refletir aspectos e relações de simbiose baseado em uma metodologia de método dedutivo com abordagem analítica juntamente com a literatura e manuais metodológicos disponíveis nos últimos cinco anos para a modelagem dos conceitos e relacionamentos de ecoparque industrial, e em consonância com o Polo Industrial de Manaus. A partir desses preceitos, observar-se-á se existem relações simbióticas espontâneas entre as 486 fábricas instaladas na Zona Franca de Manaus e a viabilidade para a instalação de um parque eco industrial na cidade de Manaus.
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Books on the topic "Modèle PITM"

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Bekbasarov, Isabay. Study of the process of driving piles and dies on models. ru: INFRA-M Academic Publishing LLC., 2020. http://dx.doi.org/10.12737/1074097.

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The monograph presents the results of experimental and theoretical studies conducted using models of driven piles and tape dies. The influence of the cross-section size, length, shape of the trunk and the lower end of the piles on their submergability, energy intensity of driving and load-bearing capacity was evaluated. The design and technological features of new types of piles are considered. A method for determining the load-bearing capacity of a pile model based on the results of dynamic tests has been developed. Similarity conditions and formulas are presented that provide modeling of the pile driving process in the laboratory. The influence of the shape of the tape dies on their submersibility, energy consumption of the driving and the bearing capacity of the foundations arranged in the vyshtampovannyh pits was evaluated. The method of determining the load-bearing capacity of a belt Foundation model based on the results of pit vyshtampovyvaniya is described. Recommendations on the choice of optimal parameters of piles and foundations, arranged in vystupovani pits. Recommended for researchers, specialists of design and construction organizations, doctoral students, postgraduates, undergraduates and students of construction and water management specialties.
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1950-, Trethewey Kenneth R., and Roberge Pierre R, eds. Modelling aqueous corrosion: From individual pits to system management. Dordrecht: Kluwer Academic Publishers, 1994.

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Winges, K. D. Continued analysis and derivation of a method to model pit retention. Research Triangle Park, N.C: U.S. Environmental Protection Agency, Office of Air and Radiation, Office of Air Quality Planning and Standards, 1986.

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Jones, Perry M. Characterization of ground-water flow between the Canisteo Mine Pit and surrounding aquifers, Mesabi Iron Range, Minnesota. Mounds View, MN: U.S. Dept. of the Interior, U.S. Geological Survey, 2002.

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Schwerdtle, Hartwig. Prozeßintegriertes Management - PIM: Ein Modell für effizientes Qualitäts-, Umwelt- und Arbeitsschutzmanagement. Springer, 1999.

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Swann, Julian. ‘Sire, in the name of God, have pity on me’. Oxford University Press, 2017. http://dx.doi.org/10.1093/acprof:oso/9780198788690.003.0004.

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Disgrace was an intensely personal experience, the repudiation of a noble courtier or servant by a discontented sovereign, and yet for nearly a century after the outbreak of the wars of religion in 1560, it was as likely to be met by violence or an attempt at negotiation rather than obedience. This chapter charts the rise of a new model of a ‘perfect disgrace’, based on submission and obedience to royal commands by examining why nobles consciously rejected opportunities to take flight. It discusses the influence of Christian, Classical, and cultural models that helped to reshape noble responses to royal disfavour. It also sheds light on how individuals conceptualized disgrace, understood its causes, tried to make sense of it and sought, wherever possible, to escape from its clutches.
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Beale, Geoff, and John Read, eds. Guidelines for Evaluating Water in Pit Slope Stability. CSIRO Publishing, 2014. http://dx.doi.org/10.1071/9780643108363.

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Guidelines for Evaluating Water in Pit Slope Stability is a comprehensive account of the hydrogeological procedures that should be followed when performing open pit slope stability design studies. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on the stability of rock slopes in open pit mines, this book expands on the hydrogeological model chapter in the LOP project's previous book Guidelines for Open Pit Slope Design (Read & Stacey, 2009; CSIRO PUBLISHING). The book comprises six sections which outline the latest technology and best practice procedures for hydrogeological investigations. The sections cover: the framework used to assess the effect of water in slope stability; how water pressures are measured and tested in the field; how a conceptual hydrogeological model is prepared; how water pressures are modelled numerically; how slope depressurisation systems are implemented; and how the performance of a slope depressurisation program is monitored and reconciled with the design. Guidelines for Evaluating Water in Pit Slope Stability offers slope design practitioners a road map that will help them decide how to investigate and treat water pressures in pit slopes. It provides guidance and essential information for mining and civil engineers, geotechnical engineers, engineering geologists and hydrogeologists involved in the investigation, design and construction of stable rock slopes.
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Read, John, and Peter Stacey. Guidelines for Open Pit Slope Design. CSIRO Publishing, 2009. http://dx.doi.org/10.1071/9780643101104.

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Guidelines for Open Pit Slope Design is a comprehensive account of the open pit slope design process. Created as an outcome of the Large Open Pit (LOP) project, an international research and technology transfer project on rock slope stability in open pit mines, this book provides an up-to-date compendium of knowledge of the slope design processes that should be followed and the tools that are available to aid slope design practitioners. This book links innovative mining geomechanics research into the strength of closely jointed rock masses with the most recent advances in numerical modelling, creating more effective ways for predicting rock slope stability and reliability in open pit mines. It sets out the key elements of slope design, the required levels of effort and the acceptance criteria that are needed to satisfy best practice with respect to pit slope investigation, design, implementation and performance monitoring. Guidelines for Open Pit Slope Design comprises 14 chapters that directly follow the life of mine sequence from project commencement through to closure. It includes: information on gathering all of the field data that is required to create a 3D model of the geotechnical conditions at a mine site; how data is collated and used to design the walls of the open pit; how the design is implemented; up-to-date procedures for wall control and performance assessment, including limits blasting, scaling, slope support and slope monitoring; and how formal risk management procedures can be applied to each stage of the process. This book will assist in meeting stakeholder requirements for pit slopes that are stable, in regards to safety, ore recovery and financial return, for the required life of the mine.
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Programas de inmunización a medida (PIM). Organización Panamericana de la Salud, 2020. http://dx.doi.org/10.37774/9789275322161.

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La vacunación o inmunización es una excelente intervención de salud, que salva millones de vidas y ahorra aún más dolor y sufrimiento. Permite reducir las desigualdades, aumentar el acceso a los servicios de salud en general e incluso reducir la pobreza. Entonces, ¿por qué muchas personas no están plenamente protegidas frente a las enfermedades prevenibles por vacunación? No hay respuesta sencilla. Algunas personas consideran que su profesional de salud no les presta el apoyo que precisan. Para otras, el horario o el período de espera resultan incómodos; otras pueden dudar de la inocuidad de la vacuna, o desconfían de las autoridades de salud. Algunas otras pueden no haber recibido información adecuada sobre cuándo y dónde acudir a vacunarse. Para alcanzar una cobertura vacunal elevada y equitativa, es necesario comprender las barreras a la vacunación en los grupos de población con insuficiente cobertura vacunal. Solo así pueden diseñarse soluciones que promuevan, motiven y hagan posible la vacunación; soluciones que garanticen la vacunación de todos los grupos de población, con independencia de sus ingresos, nivel educativo, edad, ubicación geográfica, grupo étnico, religión o creencias filosóficas. La Oficina Regional de la OMS para Europa ha desarrollado el enfoque “Programas de inmunización a medida” (PIM) para ayudar a los países a lograrlo. Se basa en los datos científicos y la experiencia a nivel de país, y busca integrar la investigación centrada en las personas y la perspectiva comportamental en las políticas y la planificación de programas de inmunización. El enfoque PIM se basa en tres pilares principales: 1) seis valores y principios; 2) un modelo teórico; y 3) un proceso gradual con ejercicios detallados. En el presente documento se describen con detalle las fases y etapas de un proceso de PIM, con ejercicios y ejemplos que puedan servir de inspiración para los talleres de planificación de PIM. Versión oficial en español de la obra original en inglés: Tailoring Immunization Programmes (TIP). © World Health Organization 2019. ISBN 978-92-89-05449-2.
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Neill, Michael. ‘Romaine Tragedie’. Edited by Michael Neill and David Schalkwyk. Oxford University Press, 2016. http://dx.doi.org/10.1093/oxfordhb/9780198724193.013.21.

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In Titus Andronicus Shakespeare and his collaborator Peele contributed to the early modern reinvention of tragedy—a genre that had effectively ceased to exist for more than a thousand years. The play’s designation as a ‘Romaine Tragedy’ announces its self-conscious engagement with classical models—an effect rendered theatrically immediate by the identification of the audience with the citizenry of Rome; but this engagement is of a conflicted kind: the presentation of Rome as a familiar model of civilization is undercut by what the play shows about the ferociously patriarchal values epitomized in the demands of ‘piety’ (pietas). The play sets up oppositions between civilization and barbarism, Roman and Goth, city and wilderness, eloquence and violence, monumental tomb and blood-drinking pit, which it then progressively collapses. Flattering its audience with the idea of England as a new Rome, Shakespeare also reminds them of the need to make Rome new—and therefore, perhaps, to take tragedy itself in new directions.
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Book chapters on the topic "Modèle PITM"

1

Choinowski, Silvia. "Das PIT-Modell." In Retail Banking im Informationszeitalter, 183–206. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-56063-7_10.

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Stiebeling, Reik Benjamin. "PIM – Das Picture-Interpretation-Model." In Das Picture Interpretation Model, 125–35. Wiesbaden: Springer Fachmedien Wiesbaden, 2019. http://dx.doi.org/10.1007/978-3-658-27764-2_4.

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Tolio, Tullio A. M., and Maria Chiara Magnanini. "The Paradigm of Pit - Stop Manufacturing." In Proceedings of the 4th International Conference on the Industry 4.0 Model for Advanced Manufacturing, 35–47. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-18180-2_3.

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Githiria, J. "Review of Mathematical Models Applied in Open-Pit Mining." In Proceedings of the 28th International Symposium on Mine Planning and Equipment Selection - MPES 2019, 92–102. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-33954-8_10.

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Zhang, Wei, Hong Mei, Haiyan Zhao, and Jie Yang. "Transformation from CIM to PIM: A Feature-Oriented Component-Based Approach." In Model Driven Engineering Languages and Systems, 248–63. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11557432_18.

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Munro, Rosalind, and Jeffrey R. Keaton. "Managing Uncertainty in Geological Engineering Models for Open-Pit Feasibility." In Engineering Geology for Society and Territory - Volume 6, 367–70. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09060-3_63.

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Richmond, A. "Direct Net Present Value Open Pit Optimisation with Probabilistic Models." In Advances in Applied Strategic Mine Planning, 217–28. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-69320-0_15.

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Maiwald, Detlef, Domenico Di Lisa, Florian Krummrich, and Frank Heinke. "Flow Detection Module—A New Model to Predict the Flow in Open Pit Anode Baking Furnaces." In Light Metals 2017, 1255–64. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51541-0_150.

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Khafagy, Khaled H., Tarek M. Hatem, and Salah M. Bedair. "Dislocation-Based Thermodynamic Models of V-Pits Formation and Strain Relaxation in InGaN/GaN Epilayers on Si Substrates." In TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings, 2057–64. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36296-6_188.

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Germain, Aurèle, Marta Corno, and Piero Ugliengo. "Computing Binding Energies of Interstellar Molecules by Semiempirical Quantum Methods: Comparison Between DFT and GFN2 on Crystalline Ice." In Computational Science and Its Applications – ICCSA 2021, 632–45. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-86976-2_43.

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AbstractInterstellar Grains (IGs) spread in the Interstellar Medium (ISM) host a multitude of chemical reactions that could lead to the production of interstellar Complex Organic Molecules (iCOMs), relevant in the context of prebiotic chemistry. These IGs are composed of a silicate-based core covered by several layers of amorphous water ice, known as a grain mantle. Molecules from the ISM gas-phase can be adsorbed at the grain surfaces, diffuse and react to give iCOMs and ultimately desorbed back to the gas phase. Thus, the study of the Binding Energy (BE) of these molecules at the water ice grain surface is important to understand the molecular composition of the ISM and its evolution in time. In this paper, we propose to use a recently developed semiempirical quantum approach, named GFN-xTB, and more precisely the GFN2 method, to compute the BE of several molecular species at the crystalline water ice slab model. This method is very cheap in term of computing power and time and was already showed in a previous work to be very accurate with small water clusters. To support our proposition, we decided to use, as a benchmark, the recent work published by some of us in which a crystalline model of proton-ordered water ice (P-ice) was adopted to predict the BEs of 21 molecules relevant in the ISM. The relatively good results obtained confirm GFN2 as the method of choice to model adsorption processes occurring at the icy grains in the ISM. The only notable exception was for the CO molecule, in which both structure and BE are badly predicted by GFN2, a real pity due to the relevance of CO in astrochemistry.
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Conference papers on the topic "Modèle PITM"

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Huang, Yuhui, Chengcheng Wang, Shan-Tung Tu, Fu-Zhen Xuan, and Takamoto Itoh. "Numerical Investigation of Stress Concentration Factor at Irregular Corrosion Pit Under Tension-Torsion Loading." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28889.

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Finite element analysis is adopted to study the stress concentration of pit area under tension-torsion loading. The stress concentration factors under regular evolution and irregular evolution of pits are investigated by conducting a series of three-dimensional semi-elliptical pitted models. Based on the finite element analysis, it can be concluded that pit aspect ratio (a/2c) is a significant parameter affecting stress concentration factor (SCF) for regular evolution pits. Pits, having higher aspect ratio, are very dangerous form and can cause significant reduction in the load carrying capacity. When local dissolution occurs in the pitting area, SCF will have a sharp increase, it is more probable for a crack to initiate from these areas compared with pits for regular evolution. Furthermore, local dissolution coefficient is proposed to study effect of local dissolution within the pit on SCF.
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2

Lee, Hong Sik, A. Neil Williams, and Sung Duk Kim. "The Diffraction of Multidirectional Random Waves by Trapezoidal Submarine Pits." In ASME 2003 22nd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2003. http://dx.doi.org/10.1115/omae2003-37212.

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A numerical model is presented to predict the interaction of multidirectional random surface waves with one or more trapezoidal submarine pits. In the present formulation, each pit may have a different side slope, while the four side slopes at the interior edge of any given pit are assumed equal. The water depth in the fluid region exterior to the pits is taken to be uniform, and the solution method for a random wave system involves the superposition of linear-wave diffraction solutions based on a two-dimensional boundary integral equation approach. The incident wave conditions are specified using a discrete form of the Mitsuyasu directional spectrum. The results of the present numerical model have been compared with those of previous theoretical studies for regular and random wave diffraction by single or multiple rectangular pits. Reasonable agreement was obtained in all cases. Based on these comparisons it is concluded that the present numerical model is an accurate and efficient tool to predict the wave field around multiple submarine pits of trapezoidal section in many practical situations.
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Chan, Kwai S., Michael P. Enright, and Jonathan P. Moody. "Development of a Probabilistic Methodology for Predicting Hot Corrosion Fatigue Crack Growth Life of Gas Turbine Engine Disks." In ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/gt2013-95057.

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Advanced Ni-based gas turbine disks are expected to operate at higher service temperatures in aggressive environment for longer time durations. Exposures of Ni-based alloys to alkaline-metal salts and sulfur compounds at elevated temperatures can lead to hot corrosion fatigue crack growth in engine disks. Type II hot corrosion involves the formation and growth of corrosion pits in Ni-based alloys at a temperature range of 650°C to 750°C. Once formed, these corrosion pits can serve as stress concentration sites where fatigue cracks can initiate and propagate to failure under subsequent cyclic loading. In this paper, a probabilistic methodology is developed for predicting the corrosion fatigue crack growth life of gas turbine engine disks made from a powder-metallurgy Ni-based superalloy (ME3). Key features of the approach include (1) a pit growth model that describes the depth and width of corrosion pits as a function of exposure time, (2) a cycle-dependent crack growth model for treating fatigue, and (3) a time-dependent crack growth model for treating corrosion. This set of deterministic models is implemented into a probabilistic life-prediction code called DARWIN. Application of this approach is demonstrated for predicting corrosion fatigue crack growth life in a gas turbine disk based on ME3 properties from the literature. The results of this study are used to assess the conditions that control the transition of a corrosion pit to a fatigue crack, and to identify the pertinent material parameters influencing corrosion fatigue life and disk reliability.
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Lee, Hong Sik, and A. Neil Williams. "The Diffraction of Multidirectional Random Waves by Rectangular Submarine Pits." In ASME 2002 21st International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2002. http://dx.doi.org/10.1115/omae2002-28058.

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The diffraction of multidirectional random surface waves with one or more rectangular submarine pits is investigated theoretically. The incident wave conditions are specified using a discrete form of the Mitsuyasu directional spectrum. The numerical model involves the superposition of regular-wave diffraction solutions based on linearized shallow water theory obtained by a two-dimensional boundary integral approach for water of uniform depth. Numerical results are presented for multi-directional random waves that illustrate the effect of the various wave and pit parameters on the diffraction characteristics of typical single and multiple pit systems.
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Larrosa, Nicolas O., Pablo Lopez-Crespo, and Robert A. Ainsworth. "A Screening Methodology to Rapidly Reduce ILI Data, Visualise and Determine Most Detrimental Defects in Pipelines." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-66190.

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The amount of data requiring detailed analysis from that obtained during in-line inspection (ILI)is reduced by a screening methodology. The methodology uses ILI outputs (dimensions of flaws, orientation and distance from starting point) to generate a visualisation of the pits within the pipeline, a ranking of pits in terms of sphericity (roundness) and depth, to evaluate pit density and generate the models for finite element analysis. The rendering tool allows a clearer view of defects within the pipelines and provides a simplified way to focus on critical pits. For a particular case of in-field data provided by BP, the number of pits in a 12-inch riser of 11 km length was reduced from 1750 obtained to 43, 15 or 4 requiring analysis, depending on the level of conservatism introduced by the analyst. The tool will allow Oil and Gas owners and operators to reduce the immense amount of data obtained during pigging to a much less time-consuming set for flaw assessment.
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Larrosa, Nicolas O., Pablo Lopez-Crespo, and Robert A. Ainsworth. "An Approach to Reduce the Amount of ILI Data in Fatigue Analysis of Pits in Pipelines." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-62594.

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This paper presents a screening methodology that is used to reduce the amount of data requiring detailed analysis from that obtained during in-line inspection (ILI). The methodology uses ILI outputs (dimensions of flaws, orientation and distance from starting point) to generate a visualisation of the pits within the pipeline, a ranking of pits in terms of sphericity (roundness) and depth, to evaluate pit density and generate the models for finite element analysis. The rendering tool allows a clearer view of defects within the pipelines and provides a simplified way to focus on critical pits. For a particular case of in-field data provided by BP, the number of pits in a 12-inch riser of 11 km length was reduced from 1750 obtained to 43, 15 or 4 requiring analysis, depending on the level of conservatism introduced by the analyst. The tool will allow Oil and Gas owners and operators to reduce the immense amount of data obtained during pigging to a much less time-consuming set for flaw assessment.
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Thomas, K. J. "Prototype IVA module (PIM)." In IEE Symposium Pulsed Power 2001. IEE, 2001. http://dx.doi.org/10.1049/ic:20010140.

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Brewick, Patrick, Andrew Geltmacher, and Siddiq M. Qidwai. "Modeling the Influence of Microstructure on Stress Distributions and Concentrations in Pitting Corrosion." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-86465.

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Despite the many advances made in material science, stainless steel and aluminum remain the structural materials best-suited for the naval fleet. While these metallic materials offer many benefits, such as high strength and good toughness, their persistent exposure to the maritime environment inevitably leads to issues with corrosion. Among the various manifestations of corrosion, pitting corrosion is of particular concern because the transition of corrosion pits to stress-corrosion cracks can lead to catastrophic failures. Traditional pitting corrosion analyses treat the pit shape as a semi-circle or ellipse and typically assume a growth pattern that maintains the original geometrical shape. However, when the underlying microstructure is incorporated into the model, pit growth is related to the grains surrounding the pit perimeter and the growth rate is proportional to crystallographic orientation. Since each grain has a potentially different orientation, pit growth happens at non-uniform rates leading to irregular geometries, i.e., non-circular and non-elliptical. These irregular pit geometries can further lead to higher stresses. This work presents a detailed look at corrosion pit growth coupled with mechanical load through a numerical model of a two-dimensional stable corrosion pit. Real microstructural information from a sample of 316 stainless steel is incorporated into the model to analyze microstructural effects on pit growth. Through this work, stress distributions and stress concentration factors are examined for a variety of pit geometries, including comparisons of their range of values to a typical, semi-circular pit. The consequences of these stress distributions and concentration factors are discussed.
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"A PIM-to-Code Requirements Engineering Framework." In International Conference on Model-Driven Engineering and Software Development. SciTePress - Science and and Technology Publications, 2013. http://dx.doi.org/10.5220/0004344701630169.

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SILVERSTEIN, EVA. "TASI/PITP/ISS LECTURES ON MODULI AND MICROPHYSICS." In TASI 2003 Lecture Notes. WORLD SCIENTIFIC, 2005. http://dx.doi.org/10.1142/9789812775108_0004.

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Reports on the topic "Modèle PITM"

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Silverstein, E. TASI/PiTP/ISS Lectures on Moduli and Microphysics. Office of Scientific and Technical Information (OSTI), May 2004. http://dx.doi.org/10.2172/826927.

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VanLehn, Kurt. Analysis of Symbolic Models of Cognition Project (ASPM-Pitt). Fort Belvoir, VA: Defense Technical Information Center, September 1992. http://dx.doi.org/10.21236/ada255929.

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Daniell, Robert E., and Jr. Improvements to the PRISM and PIM Ionospheric Models. Fort Belvoir, VA: Defense Technical Information Center, August 1999. http://dx.doi.org/10.21236/ada388875.

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Estrin, D., D. Farinacci, A. Helmy, D. Thaler, S. Deering, M. Handley, V. Jacobson, C. Liu, P. Sharma, and L. Wei. Protocol Independent Multicast-Sparse Mode (PIM-SM): Protocol Specification. RFC Editor, June 1998. http://dx.doi.org/10.17487/rfc2362.

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Estrin, D., D. Farinacci, A. Helmy, D. Thaler, S. Deering, M. Handley, V. Jacobson, C. Liu, P. Sharma, and L. Wei. Protocol Independent Multicast-Sparse Mode (PIM-SM): Protocol Specification. RFC Editor, June 1997. http://dx.doi.org/10.17487/rfc2117.

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Fenner, B., M. Handley, H. Holbrook, and I. Kouvelas. Protocol Independent Multicast - Sparse Mode (PIM-SM): Protocol Specification (Revised). RFC Editor, August 2006. http://dx.doi.org/10.17487/rfc4601.

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Adams, A., J. Nicholas, and W. Siadak. Protocol Independent Multicast - Dense Mode (PIM-DM): Protocol Specification (Revised). RFC Editor, January 2005. http://dx.doi.org/10.17487/rfc3973.

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Fenner, B., M. Handley, H. Holbrook, I. Kouvelas, R. Parekh, Z. Zhang, and L. Zheng. Protocol Independent Multicast - Sparse Mode (PIM-SM): Protocol Specification (Revised). RFC Editor, March 2016. http://dx.doi.org/10.17487/rfc7761.

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Pusateri, T. Protocol Independent Multicast - Sparse Mode (PIM-SM) IETF Proposed Standard Requirements Analysis. RFC Editor, August 2006. http://dx.doi.org/10.17487/rfc4602.

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Farinacci, D., D. Meyer, and Y. Rekhter. Intra-LIS IP multicast among routers over ATM using Sparse Mode PIM. RFC Editor, April 1998. http://dx.doi.org/10.17487/rfc2337.

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