Relevant bibliographies by topics / 91A16

Academic literature on the topic '91A16'

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Published: 1 June 2024

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

Journal articles on the topic "91A16":

1

Xu, Shuichan, Tam Tran, Dan Zhu, Tao Shi, David Mikolon, Jim Leisten, Philip Chamberlain, et al. "Abstract 1180: Discovery of CC-91516, a potent and selective ERK/NLK inhibitor, with anti-tumor activity in preclinical cancer models harboring BRAF or CTNNB1 mutation." Cancer Research 82, no. 12_Supplement (June 15, 2022): 1180. http://dx.doi.org/10.1158/1538-7445.am2022-1180.

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Abstract CC-91516 (also called CC0776314), a selective and potent inhibitor of ERK1/2 and NLK, was discovered via a phenotypic screen of a kinase-focused library for compounds that synergize with mTOR kinase inhibitor CC-223 to induce apoptosis in combination with CC-223. Broad kinase selectivity profiling identified ERK1/2 and NLK as targets of CC-91516. Crystal structure of CC-91516 in complex with ERK2 reveals that its 2, 4, 6-trichlorophenyl moiety binds to a unique back pocket of the adenosine-5′-triphosphate (ATP) binding site of ERK2, which is not accessible to other ERK inhibitors such as BVD-523 and GDC-0994. This unique binding mode of CC-91516 leads to a slow off-rate for its ERK binding with long residence time disrupting both the active and inactive ERK forms. Consequentially, CC-91516 causes sustained inhibition of the MAPK pathway in BRAF mutant colorectal cancer cells. In addition, CC-91516 also regulates Wnt/β-catenin and YAP pathways in multiple cancer cell lines. CC-91516 shows potent yet selective anti-proliferative activity against a large panel of cancer cell lines. Activating mutations in BRAF or CTNNB1 gene associate with sensitivity to CC-91516-mediated anti-proliferative activity while mutations in RB and PI3K/PTEN pathway associate with resistance. CC-91516 inhibits ex vivo colony formation of PDX models with BRAF and CTNNB1 mutations. In addition, CC-91516 potently induces apoptosis, inhibits survival, and overcomes resistance to MEK inhibitor trametinib of BRAF or CTNNB1 mutant cancer cells in long-term culture assay in vitro. CC-91516 has good oral bioavailability and shows excellent anti-tumor activity in vivo against both BRAF and CTNNB1 mutant xenograft models. DMPK and toxicology studies showed robust oral exposure across preclinical species. In summary, CC-91516 has demonstrated preclinical anti-tumor activities and DMPK and safety profiles in support of its clinical development. Citation Format: Shuichan Xu, Tam Tran, Dan Zhu, Tao Shi, David Mikolon, Jim Leisten, Philip Chamberlain, Laurie LeBrun, Sogole Bahmanyar, Ning Jiang, Jingjing Zhao, Mehnaz Malek, Ellen Filvaroff, Heather Raymon, Robert Hubbard, John Boylan. Discovery of CC-91516, a potent and selective ERK/NLK inhibitor, with anti-tumor activity in preclinical cancer models harboring BRAF or CTNNB1 mutation [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 1180.
2

Scott, J. A. "91.16 Some properties of ordered triangle cotangents." Mathematical Gazette 91, no. 520 (March 2007): 112–14. http://dx.doi.org/10.1017/s0025557200181124.

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Asih, Dian Wahyuning, Kartini Marzuki, and Susilawati Susilawati. "Meningkatkan Kemampuan Motorik Halus Melalui Kegiatan Menggunting." EDUSTUDENT: Jurnal Ilmiah Pendidikan dan Pembelajaran 1, no. 3 (April 30, 2022): 139. http://dx.doi.org/10.26858/edustudent.v1i3.27251.

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Abstract. The purpose of this study was for researchers to know the improvement in fine motor physical development through cutting activities. The method used is Classroom Action Research where this research is an action to solve a problem in activities to improve the learning process. The research was conducted in two cycles. Each cycle consisted of planning, implementation, observation, and reflection stages. The results showed that improving children's fine motor skills through cutting activities was proven to be used in learning. In the first cycle, the average ability of children reached 76.63%, increasing to 91.16% in the second cycle. The increase is marked by increased interest, ability, neatness, and independence of children. This activity uses color images and character scissors that have never been used in previous research. Based on these results, it can be concluded that children's fine motor skills can be improved through cutting activities..Abstrak. Tujuan dari penelitian ini agar peneliti mengetahui peningkatan dalam pengembangan fisik motorik halus melalui kegiatan menggunting. Metode yang digunakan adalah Penelitian Tindakan Kelas dimana penelitian ini adalah suatu tindakan untuk memecahkan suatu masalah dalam kegiatan untuk memperbaiki proses dalam pembelajaran. Penelitian dilakukan dalam II siklus. Setiap siklus terdiri dari tahap perencanaan, pelaksanaan, observasi, dan refleksi. Hasil penelitian menunjukkan bahwa peningkatan kemampuan motorik halus anak melalui kegiatan menggunting terbukti dapat dimanfaatkan dalam pembelajaran. Pada siklus I kemampuan rata rata anak mencapai 76,63 % meningkat menjadi 91,16% pada siklus II. Peningkatan ditandai dengan meningkatnya minat, kemampuan, kerapian, dan kemandirian anak. Kegiatan ini menggunakan media gambar yang berwarna dan gunting karakter yang belum pernah digunakan pada penelitian sebelumnya. Berdasarkan hasil tersebut dapat disimpulkan bahwa kemampuan motorik halus anak dapat ditingkatkan melalui kegiatan menggunting.
4

Stiner, LaTonia, David Padgett, and John Sheridan. "Mechanisms of social disruption stress induced glucocorticoid resistance (91.16)." Journal of Immunology 182, no. 1_Supplement (April 1, 2009): 91.16. http://dx.doi.org/10.4049/jimmunol.182.supp.91.16.

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Abstract Social disruption (SDR) stress increases splenic CD11b+ myeloid cells, which produce high levels of proinflammatory cytokines upon Toll-like receptor ligation and show impaired nuclear translocation of the GC receptor (GCr) after corticosterone (cort) stimulation. To uncover the mechanism of GC resistance, p38 MAPK (p38) expression and phosphorylation were investigated along with phosphorylation of the GCr. To examine the mechanism(s) of enhanced proinflammatory cytokine responses, CD11b+ splenocytes from control (HCC) and SDR mice were stimulated with lipopolysaccharide in the presence of cort. SDR and HCC CD11b+ cells show similar levels of unphosphorylated p38 protein. CD11b+ cells from SDR mice exhibited an increase in phosphorylation of p38 and of the GCr. Since phosphorylation of p38 has been linked to GCr phosphorylation in humans, it is likely that a same phenomenon occurs here, though it must be confirmed. Since, phosphorylation of the GCr reduces steroid-induced cytokine repression; this may explain the enhanced cytokine expression. These data show that phosphorylated forms of p38 and GCr play a role in GC resistance. Support: NIH grants NIMH/RO1MH046801-16 and NIDCR/T32DE014320-6
5

Rashid, Muhammad Usman, and W. M. A. Wan Daud. "Correction: An investigation on the influence of catalyst composition, calcination and reduction temperatures on Ni/MgO catalyst for dry reforming of methane." RSC Advances 10, no. 56 (2020): 33964. http://dx.doi.org/10.1039/d0ra90098b.

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Correction for ‘An investigation on the influence of catalyst composition, calcination and reduction temperatures on Ni/MgO catalyst for dry reforming of methane’ by Muhammad Usman Rashid et al., RSC Adv., 2016, 6, 91603–91616, DOI: 10.1039/C6RA15256B.
6

Shen, Ye-Dan, and Jian-Li Lin. "Crystal structure of hexaaquazinc(II) 4-nitrobenzoate dihydrate, C14H24N2O16Zn." Zeitschrift für Kristallographie - New Crystal Structures 228, no. 1 (March 1, 2013): 25–26. http://dx.doi.org/10.1524/ncrs.2013.0016.

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Abstract C14H24N2O16Zn, triclinic, P1̄ (no. 2), a = 5.980(1) Å, b = 7.363(2) Å, c = 12.360(3) Å, α = 97.90(3)°, β = 96.83(3)°, γ = 91.16(3)°, V = 534.9 Å3, Z = 1, Rgt(F) = 0.0439, wRref(F2) = 0.1315, T = 295 K.
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Umma, Fatiya Nur, Budi Warsito, and Di Asih I. Maruddani. "KLASIFIKASI STATUS KEMISKINAN RUMAH TANGGA DENGAN ALGORITMA C5.0 DI KABUPATEN PEMALANG." Jurnal Gaussian 10, no. 2 (May 31, 2021): 221–29. http://dx.doi.org/10.14710/j.gauss.v10i2.29934.

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Pemalang regency is a district which has amount of poverty around 16.04%. One of the effort that must be improved in tackling poverty is increasing the accuracy of the government program’s target. The improvement of target accuracy is expected to give the better impact on the welfare of the population. This study classified the poverty status of households in Pemalang regency using C5.0 Algorithm. The poverty status of households is divided into two classes, namely poor and non-poor. There was an imbalance of data in both classes. Data imbalances were handled by using Synthetic Minority Oversampling Technique (SMOTE). From the research that has been done, SMOTE application in classification of household poverty status affected the evaluation value of the model. Previously the model could not classify the minority class and after using SMOTE the model produced an average value of sensitivity 25.80%. SMOTE application increased the average value of specificity from 91.16% to 94.91%. However, SMOTE application decreased the average value of accuracy which originally 91.16% down to 82.2%.Keywords : C5.0, Household poverty, Classification, SMOTE
8

 Ornelas-Flores, María Cristina, and Francisco Emilio Ferreira-Aparicio. "Quemaduras por electricidad en cuello y nuca, reconstrucción mediante colgajo fasciocutáneo escapular." Cirugía Plástica 29, no. 2 (2019): 231–35. http://dx.doi.org/10.35366/91716.

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Fekel, Francis C., Kim Gillies, John Africano, and Robert Quigley. "Chromospherically active stars. V - HD 91816=LR Hya: A double-lined BY Draconis type binary." Astronomical Journal 96 (October 1988): 1426. http://dx.doi.org/10.1086/114893.

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Zhu, Zhou, Sun-Young Oh, Fan Wu, and Tao Zheng. "Dual Roles of Inositol Phosphatase SHIP-1 in Active and Passive Systemic Anaphylactic Responses (91.16)." Journal of Immunology 184, no. 1_Supplement (April 1, 2010): 91.16. http://dx.doi.org/10.4049/jimmunol.184.supp.91.16.

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Abstract SHIP-1 is a negative regulator of signaling pathways triggered by antigens and cytokines. We reported that SHIP-1 knockout (KO) mice develop a spontaneous allergic pulmonary inflammation. To determine the roles of SHIP-1 in innate and adaptive immune responses, we examined IgE-dependent passive (PSA) and OVA-induced active systemic anaphylactic (ASA) responses in mice deficient in SHIP-1. Heterozygous SHIP-1 (hSHIP) mice were compared with C57BL/6 wild type (WT) mice. For PSA, 24 h after passive immunization with 5 µg anti-DNP IgE, mice were challenged i.v. with 1 mg of DNP-HSA. For ASA, mice were immunized i.p. once or twice with 50 µg of OVA/Alum on day 1 and 7 and then challenged with 1 mg of OVA on day 14 or 21. The core body temperature was monitored and blood was collected for serum immunoglobulins. Compared to WT controls, hSHIP mice developed significantly enhanced IgE-dependent PSA, but surprisingly, with one-time sensitization, hSHIP mice developed diminished ASA responses. Serum OVA-specific IgE and IgG1 were significantly lower but OVA-specific IgG2a was significantly higher in hSHIP mice. These studies demonstrate that SHIP-1 deficiency leads to enhanced PSA by increased mast cell response but diminished ASA, possibly due to impaired Th2 response to allergen and decreased production of IgE and IgG1. Thus, in contrast to its role as a negative regulator in innate immunity, SHIP-1 may play a critical role in the Th2 adaptive immunity as a positive regulator.
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Journal articles Dissertations / Theses Books

Dissertations / Theses on the topic "91A16":

1

Ashe, Leah M. "Towards a dignified food security? : discourses of dignity, development and culture in New York City and Bogotá." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/91416/.

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In light of a severe, changing and globally implicative New Food Equation marked perhaps above all else by the dynamics of a new, bimodal food insecurity and the simultaneous rising importance of cities, new approaches to address food security at urban scales suggest promise. But as such efforts are relatively new, the discourses and activities of urban actors are understood to only a limited extent. Moreover, while attention to food security per se is robust and growing, attention to the discursive and narrative dimensions that ultimately construct both the real nutritional achievements and the real experiential implications of such policy is not. In this research, I apply analytical methods informed by the interpretive, critical and ethnographic traditions to understand (some of) the cultural, ideological and philosophical particularities of these new dynamics and contexts, examining the cases of two large cities in the North and South, New York City and Bogotá. Tandem to the empirical work, I explore the philosophical tenets that ground food security efforts in the two studied cities and more generally, and I finally settle upon the purposefully normative appeal for motion towards a new concept: dignified food security.
2

Gbajumo-Sheriff, Mariam. "Does work-life balance have a cultural face? : understanding the work-life interface of Nigerian working mothers." Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/91316/.

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With the increase in the number of women working in the formal economy, there has been a growing literature on women handling multiple roles arising from work and the home. Currently there is a gap in the literature about the activities of working mothers in emerging economies, with theories and most findings concentrated on studies in advanced economies. This study therefore intends to fill part of the gap in the literature by investigating the lives of working mothers in the oil and gas sector in Nigeria, with a view of understanding their challenges, pains and gains as they navigate between the home and work spheres. This research adopted a qualitative approach through the administration of semi-structured interviews to working mothers, supervisors and Human Resources practitioners. Using the Greenhaus and Beutell’s (1985) sources of conflict model, this study explored the work and family lives of working mothers in Nigeria, thereby giving a detailed view of the time, strain and behaviour-based conflict they experience, as well as appropriate coping strategies that have been put in place to mitigate the effects of such conflicts. Findings complement earlier studies on work and family in Africa focusing on the experience of strain by working mothers in Nigeria. However, analysis from this study suggests that some of these stress-related conflicts were caused by the prevalent work culture of presenteeism. In comparing evidence of a more equal sharing of domestic tasks between couples in advanced economies, the embrace of equal sharing of housework by men and a demand for such by women in Nigeria is rather limited and slow. A striking difference on the strategies employed by working mothers in the west and in Nigeria is that what working mothers in Nigeria lose by way of government support, they gain in the form of family support.
3

Smyrnaios, Ioannis. "The correlation of technological and stylistic changes, and society, in the production of attic geometric and orientalising finewares." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/91116/.

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This thesis investigates stylistic and technological changes in the production of Attic Geometric and Orientalising finewares (c. 900 – 620 BC), and their relationship with society. The transition from the abstract motifs of the Early and Middle Geometric styles to the figurative representations of the Late Geometric and Orientalising styles are examined in conjunction with the technological advances in the ceramic chaîne opératoire, and the social changes that characterise these periods. According to previous studies, the social developments in the Athenian polis between the 9th and 7th centuries BC left traces in the archaeological record suggesting competition among different elite groups. This social competition was expressed through funerary rites, which were subject to continuous changes all across the Attic Early Iron Age. The consumption of decorated finewares in such rites and other important social occasions demarcated the social position of the consumers/users of fine decorated pottery, while ceramic styles adapted to accommodate the changing nature of social demands. An important manifestation of stylistic change was the dominance of the figurative style in pottery decoration during the beginning of the Late Geometric period (c.760 BC). The original hypothesis of this research project is based on the fact that decoration was only part of the total production sequence of Attic Geometric and Orientalising pottery; therefore, it could be likely that the social changes noted during these periods triggered broader advances in ceramic technologies employed for the production of such finewares. This thesis moves away from traditional stylistic approaches and employs a technological approach based on the chaîne opératoire theory in order to explore the behaviour of Attic Early Iron Age potters and their response towards changing consumption demands during an era of significant social transformations.
4

Wang, Zhongnan. "Tribological investigation for next-generation polymeric micro-systems." Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/91016/.

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The development of micro-fabrication processes for 3D microstructures has led to the production of low-cost, low-energy devices at millimeter scales known as MEMS for a wide range of electronic, mechanical, mechatronic and biomedical applications. As surface-to-volume ratio increases drastically with decreasing dimension, surface properties of the materials are the prominent factor at the interface between two solids and consequent tribological issues such as adhesion, friction and wear will arise in MEMS devices when surfaces are in, or have the potential for, sliding contact. Measurement techniques and principles used in micro-tribology are quite different from those in macro-tribology. Various specialized micro-tribometers have attracted recent attention in attempts to obtain consistent, accurate tribological measurements that could provide information for the design of MEMS components. However, even these have operational parameters quite different to those in the regime typical of MEMS devices. For example, the thermal properties of polymers might mean that they are especially sensitivity to the speeds and reciprocating scan frequencies of measurements. This is a serious concern because the selection of appropriate materials for such applications is very important in order to reduce not only friction and wear, but also the stiction of the parts. The immediate challenge is that there is very little reliable information about the properties of this new generation of engineering materials because of insufficient understanding and characterization of their behaviour at the microscale under a wide range of experimental conditions. With these points in mind, this thesis aims to prompt wide study of the micro-tribological properties of polymers for MEMS applications, providing preliminary new data on them while exploring in some detail possible uncertainty effects that could arise from the testing regimes of most micro-tribometers. It starts by re-commissioning and characterizing a unique, wide-bandwidth prototype micro-tribometer developed at Warwick, establishing good operating procedures by comparing measurements on materials widely discussed in the literature. New data has been collected on an acrylate resin typically used for micro-stereo-lithography, PTFE and oxide-coated silicon. It suggests that deviations from Amonton’s law in the ten millinewton range might be less severe than previously reported. Observing that the skill and time required for such testing makes it unattractive for a production control environment, the thesis then explores, via contact modelling, whether there is a useful correlation between Berkovich tip nano-hardness and the micro-friction of the polymeric samples: several plausible modelling assumptions are shown to lead to inconsistencies. Final discussions and recommendations consider how to move on from these experimental scoping studies to acquire detailed evaluations of the properties of the best candidates under typical usage conditions prior to designers of potential products taking these materials and processes at all seriously.
5

Leutscher, de las Nieves Marcos. "Contributions to the linear programming approach for mean field games and its applications to electricity markets." Electronic Thesis or Diss., Institut polytechnique de Paris, 2022. http://www.theses.fr/2022IPPAG010.

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Cette thèse présente trois contributions principales liées à l'approche de programmation linéaire pour les jeux à champ moyen (MFGs).La première partie de la thèse traite les aspects théoriques des MFGs permettant simultanément arrêt optimal, contrôle stochastique et absorption. En utilisant la formulation de programmation linéaire pour ce type de MFGs, un résultat général d'existence pour les équilibres de Nash MFG est dérivé sous des hypothèses faibles à travers du théorème de point fixe de Kakutani-Fan-Glicksberg. Nous montrons que cette méthode de relaxation est équivalente à l'approche par martingales contrôlées/arrêtées pour les MFG, une autre méthode de relaxation utilisée dans des articles précédents dans le cas du contrôle. De plus, sous des conditions appropriées, nous montrons que notre notion de solution satisfait un système d'équations différentielles partielles (EDP), ce qui permet de comparer nos résultats avec la littérature sur les EDP.La deuxième partie se concentre sur un algorithme numérique pour l'approximation de l'équilibre de Nash MFG en tirant profit de l'approche par programmation linéaire. La convergence de cet algorithme est démontrée pour deux classes de MFG, les MFG avec arrêt optimal et absorption, et les MFG avec contrôle stochastique et absorption. Le schéma numérique appartient à la classe des procédures d'apprentissage. En particulier, nous appliquons l'algorithme Fictitious Play où la meilleure réponse à chaque itération est calculée en résolvant un problème de programmation linéaire.La dernière partie de la thèse porte sur une application des MFGs à la dynamique long terme de l'industrie de l'électricité. Différents scénarios macroéconomiques et de politique climatique sont possibles pour les années à venir, or le scénario exact reste incertain. Par conséquent, les producteurs conventionnels ou renouvelables visant à sortir du marché ou à y entrer, respectivement, sont confrontés à l'incertitude concernant le prix du carbone et les politiques climatiques à venir. Les deux classes de producteurs interagissent par le biais du prix de l'électricité. Des stratégies d'équilibre de Nash sur des temps d'arrêt sont considérées et le problème est analysé à travers d'un modèle MFG. À cette fin, nous développons l'approche de programmation linéaire pour les MFG d'arrêt optimal avec bruit commun et information partielle en temps discret. Nous montrons l'existence d'un équilibre de Nash MFG et l'unicité du prix de marché en équilibre. Enfin, nous étendons l'algorithme numérique développé dans la deuxième partie de la thèse pour illustrer le modèle avec un exemple empirique inspiré du marché de l'électricité britannique
This thesis presents three main contributions related to the linear programming approach for mean field games (MFGs).The first part of the thesis is concerned with the theoretical aspects of MFGs allowing simultaneously for optimal stopping, stochastic control and absorption. Using the linear programming formulation for this type of MFGs, a general existence result for MFG Nash equilibria is derived under mild assumptions by means of Kakutani-Fan-Glicksberg's fixed point theorem. This relaxation method is shown to be equivalent to the controlled/stopped martingale approach for MFGs, another relaxation method used in earlier papers in the pure control case. Furthermore, under appropriate conditions, we show that our notion of solution satisfies a partial differential equation (PDE) system, allowing to compare our results with the PDE literature.The second part focuses on a numerical algorithm for approximating the MFG Nash equilibrium taking advantage of the linear programming approach. The convergence of this algorithm is shown for two classes of MFG, MFGs with optimal stopping and absorption, and MFGs with stochastic control and absorption. The numerical scheme belongs to the class of learning procedures. In particular, we apply the Fictitious Play algorithm where the best response at each iteration is computed by solving a linear programming problem.The last part of the thesis deals with an application of MFGs to the long term dynamics of the electricity industry. Different macroeconomic and climate policy scenarios are possible for the coming years, and the exact scenario remains uncertain. Therefore, conventional or renewable producers aiming to exit or enter the market, respectively, are facing uncertainty about the future carbon price and climate policies. Both classes of producers interact through the electricity market price. Nash equilibrium strategies over stopping times are considered and the problem is analyzed through a MFG model. To this end, we develop the linear programming approach for MFGs of optimal stopping with common noise and partial information in discrete time. We show the existence of an MFG Nash equilibrium and the uniqueness of the equilibrium market price. Finally, we extend the numerical algorithm developed in the second part of the thesis to illustrate the model with an empirical example inspired by the UK electricity market
6

Bagnoli, Annalisa. "Estensioni trascendenti di campi." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9116/.

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Lo scopo di questa tesi è di studiare i principali risultati riguardanti le estensioni trascendenti di campi, l'indipendenza algebrica di elementi trascendenti su un campo, le basi di trascendenza di un'estensione. A partire da questi risultati vengono dimostrati due importanti teoremi di geometria algebrica: il Teorema degli zeri di Hilbert e il Teorema di Lüroth.
7

Nguyen, Duc. "Discrete and continuum modelling of micro-lattices in dynamics." Thesis, University of Sheffield, 2015. http://etheses.whiterose.ac.uk/9116/.

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Materials with a sparse, periodic lattice microstructure exhibit excellent mechanical performance compared to their weight. Particularly, their engineered microstructure allows optimised mechanical behaviour under dynamic loading conditions. For instance, the material's microstructure can be manipulated such that wave filters emerge so that only certain frequencies can propagate through the material. Various techniques can be used to model such materials with lattice microstructures. For instance, a discrete model can be deployed whereby every strut of the lattice structure is modelled as a beam element. However, a more efficient approach is to replace such a detailed microscopic material model with an enriched continuum model for certain dynamic problems. Compared to the classical continuum, the new model allows the microstructural effects to be captured efficiently and effectively by equipping the continuum equations of elasticity with an appropriate set of higher-order spatial derivatives; hence, a gradient elasticity formulation is obtained. In order to link the additional constitutive coefficients of gradient elasticity to the geometric and mechanical properties of the lattice, in this thesis we use continualisation techniques whereby a representative volume element of a discrete square lattice model is translated into a homogeneous continuum formulation. Taylor series expansions and Pad\' approximations are usually required to ensure stability of the gradient elasticity model. The resulting continuum formulation is equipped with a range of strain gradient and inertia gradient terms. The dispersive properties of the model are then tested to check for the occurrence of wave filters. Applications of the Ru-Aifantis theorem are considered in detail. Finally, implementability with finite elements of the new continuum is examined. The research first reviews the one-dimensional case and subsequently applies the procedure to two-dimensional lattices of square, trapezium and hexagonal geometry arrangements.
8

Badin, Marcelo Gonsalez [UNESP]. "Um olhar sobre as contribuições do professor Nelson Onuchic para o desenvolvimento da matemática no Brasil." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/91016.

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Made available in DSpace on 2014-06-11T19:24:51Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-12-12Bitstream added on 2014-06-13T18:21:23Z : No. of bitstreams: 1 badin_mg_me_rcla.pdf: 2506665 bytes, checksum: ed6579141d944fa43f299d7ec389cdec (MD5)
O objetivo deste trabalho é apresentar as contribuições do professor Nelson Onuchic para o desenvolvimento da Matemática no Brasil, mostrando a atuação dele na criação dos cursos de Matemática da Unesp - Rio Claro e da USP - São Carlos, sua trajetória acadêmica, seus feitos como matemático e também como orientador, com significativa influência na implementação, em nosso país, de uma linha de pesquisa na área de equações diferenciais. Dessa forma, pretendemos contribuir para a escrita da história do desenvolvimento da Matemática no Brasil, relevando a participação do professor Onuchic no processo. Apresentamos, para isso, uma biografia de Nelson Onuchic, destacando o trabalho dele como professor e pesquisador, suas relações com as instituições de ensino e pesquisa onde atuou, sua produção acadêmica e a continuidade da linha de pesquisa por ele iniciada. Este estudo baseou-se em pesquisas documentais e entrevistas: as primeiras, realizadas nos arquivos pessoais de Lourdes Onuchic e nas universidades onde o professor Onuchic trabalhou; as entrevistas, realizadas com familiares dele, alunos e outros educadores com os quais ele conviveu durante a vida acadêmica. Entrevistas, realizadas com familiares dele, alunos e outros educadores com os quais ele conviveu durante a vida acadêmica.
This work aims at presenting Professor Nelson Onuchicþs contributions to the development of Mathematics in Brazil, showing his achievement in the creation of Mathematics courses at Unesp - Rio Claro and at USP - São Carlos, his academic trajectory and his performance as a mathematician and also as an advisor with significant influence in the implementation, in our country, of a line of research in the area of differential equations. In this way we intend to contribute to the writing of the history of the development of Mathematics in Brazil, pointing out Professor Onuchicþs participation in the process. To do so, we present Nelson Onuchicþs biography, focusing his work as a professor and researcher, his relations with the education and research institutions where he worked, his academic production and the continuity of the line of research that he initiated. This study was based on documentary research and on interviews: the first ones carried through in the personal archives of Lourdes Onuchic and at the universities where Professor Onuchic worked; the interviews were carried through with his family, his students and other educators with whom he lived during his academic life.
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Benedetti, Francisco Carlos [UNESP]. "Funções, software gráfico e coletivos pensantes." Universidade Estadual Paulista (UNESP), 2003. http://hdl.handle.net/11449/91116.

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Esta pesquisa investiga as potencialidades de um software gráfico no coordenação das representações múltiplas de funções, por dois pares de estudantes de primeira série do Ensino Médio, os quais iniciavam o estudo desse assunto em suas aulas regulares. A relevância da investigação relaciona-se sobretudo à emergência de software gráficos gratuitos, bem como ao tema das representações múltiplas de funções, tanto em termos de currículo quanto ao cotodiano dos alunos. Sendo uma pesquisa qualitativa, a estratégia metodológica esperimentos de ensino foi utilizada ao se observarem ações desses estudantes no estudo das representações múltiplas de certas funções não tradicionalmente estudadas em sala de aula, na série considerada, como aquelas cujas expressões analíticas são...
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Sampaio, Maria Nobre [UNESP]. "Desempenho ortográfico de escolares do ensino fundamental: elaboração e aplicação de um instrumento de intervenção." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/91216.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
A aquisição da linguagem escrita permite aos escolares sua integração nas práticas sociais. No contexto educacional, a preocupação com o ensino e aprendizagem formal da escrita ganha destaque e preocupação por partes dos educadores e outros profissionais da área devido a sua complexidade no ensino e alto índice de escolares com dificuldades relacionadas à ortografia. Esta pesquisa apresentou-se na forma de três estudos. O Estudo 1 teve como objetivos levantar o perfil ortográfico dos escolares do 1º ao 5º ano do ensino público, visando caracterizar, comparar e classificar o desempenho ortográfico segundo a semiologia dos erros, bem como identificar o nível ortográfico desta população. Foram avaliados 150 escolares do 1º ao 5º ano escolar, de ambos os gêneros, na faixa etária de seis a 12 anos de idade. Como procedimento de avaliação foi aplicado o protocolo de avaliação ortográfica - Pro-Ortografia, na versão coletiva e individual. Como resultado foi possível verificar que os escolares avaliados apresentaram média de acertos que se tornaram superior com o aumento da seriação escolar no Pró-Ortografia e, com relação á classificação semiológica, os achados indicaram maior freqüência de erros de ortografia natural em relação aos erros de ortografia arbitrária. O Estudo 2 teve como objetivo a elaboração de um programa de intervenção com as dificuldades ortográficas segundo a semiologia dos erros. O Estudo 3 teve como objetivo verificar a eficácia do programa de intervenção em escolares com desempenho ortográfico inferior. Participaram deste estudo 40 escolares do 3º ao 5º ano do ensino fundamental público da cidade de Marília-SP, de ambos os gêneros, na faixa etária de oito a 12 anos de idade...
The acquisition of written language enables the students their integration into social practices. In the educational context, the concern with the learning and formal teaching of writing is emphasized and concern from the educators and other professionals because of its complexity in the education and indice high of students with difficulties related to spelling. This research was presented in the form of three studies. Study 1 aimed to raise the spelling profile of the students from 1st to 5th grades of public education, in order to characterize, to compare and to classify the spelling performance second the semiology of the errors as well as to identify the spelling standard of this population. 150 students from 1st to 5th grade school, of both genders, with aged of six to 12 years old were evaluated. As the evaluation procedure was applied the spelling evaluation protocol – Pro-Orthography, in collective and individual version. As result it was possible to verify that the students evaluated had an average of right answer that have become higher with increasing grade level school in the Pro-Orthography and with respect to semiologycal classification, the findings indicated a higher frequency of natural spelling errors in relation the arbitrary spelling errors. Study 2 aimed to elaborate of an intervention program with the spelling difficulties second the semiology of the errors. Study 3 aimed to verify the effectiveness of the intervention program in students with lower spelling performance. The study included 40 students of the 3rd to 5th grade of public elementary education of the city of Marília-SP, of both genders, in aged of eight to 12 years old, being distributed in the following groups: GI (20 students... (Complete abstract click electronic access below)
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Books on the topic "91A16":

1

), San Francisco (Calif. Departmental supplementary agreement between Public Transportation Department and Service Employees International Union Local 790, Classes 9110 and 9116. [San Francisco, Calif: SEIU, 2000.

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Akhmet, Marat. Nonlinear Hybrid Continuous/Discrete-Time Models. Paris: Atlantis Press, 2011. http://dx.doi.org/10.2991/978-94-91216-03-9.

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Chen, Liming, Chris D. Nugent, Jit Biswas, and Jesse Hoey, eds. Activity Recognition in Pervasive Intelligent Environments. Paris: Atlantis Press, 2011. http://dx.doi.org/10.2991/978-94-91216-05-3.

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Victor, Patricia, Chris Cornelis, and Martine de Cock. Trust Networks for Recommender Systems. Paris: Atlantis Press, 2011. http://dx.doi.org/10.2991/978-94-91216-08-4.

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Goertzel, Ben, Nil Geisweiller, Lucio Coelho, Predrag Janičić, and Cassio Pennachin. Real-World Reasoning: Toward Scalable, Uncertain Spatiotemporal, Contextual and Causal Inference. Paris: Atlantis Press, 2011. http://dx.doi.org/10.2991/978-94-91216-11-4.

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Savchuk, Vladimir, and Chris P. Tsokos. Bayesian Theory and Methods with Applications. Paris: Atlantis Press, 2011. http://dx.doi.org/10.2991/978-94-91216-14-5.

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Pachpatte, B. G. Multidimensional Integral Equations and Inequalities. Paris: Atlantis Press, 2011. http://dx.doi.org/10.2991/978-94-91216-17-6.

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Ahad, Md Atiqur Rahman. Computer Vision and Action Recognition. Paris: Atlantis Press, 2011. http://dx.doi.org/10.2991/978-94-91216-20-6.

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Suzuki, Takashi. Mean Field Theories and Dual Variation. Paris: Atlantis Press, 2009. http://dx.doi.org/10.2991/978-94-91216-22-0.

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Lakshmikantham, V., E. Escultura, and S. Leela. The Hybrid Grand Unified Theory. Paris: Atlantis Press, 2009. http://dx.doi.org/10.2991/978-94-91216-23-7.

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Book chapters on the topic "91A16":

1

Xu, Dawei, Yijie She, Zhonghua Tan, Ruiguang Li, and Jian Zhao. "Research on the Recognition of Internet Buzzword Features Based on Transformer." In Communications in Computer and Information Science, 227–37. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-8285-9_17.

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AbstractAccurate identification of Internet buzzwords plays an important role in positive Internet opinion guidance. A Transformer-based Internet buzzword feature recognition system was designed to address this problem. The traditional way of crawling data has been improved, a real-time crawling module has been added, and an Internet buzzword corpus has been constructed by itself. The traditional way of crawling data has been improved, a real-time crawling module has been added, and an Internet buzzword corpus has been constructed by itself. Traditional machine learning models suffer from gradient disappearance and gradient explosion, the Transformer model, with its parallel computing and self-attentive mechanism, is a good solution to these problems, and its bi-directional connection allows the parameters of the context to be updated uniformly, thus allowing better aggregation of information and solving the problem of scattered contextual information. Transformation of the position-encoded part of the Transformer model starts with a relative position representation (RPR). It compensates for its inability to obtain relative location information. The experimental results show that the improved Transformer model can achieve an accuracy rate of 90.1%, a recall rate of 92.13%, and an F1 value of 91.16% in recognizing Internet buzzwords.
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Kuchenbuch, Rolf O., and Keith T. Ingram. "Which part of the root system of corn (Zea mays L.) is visible at transparent surfaces?" In Durchwurzelung, Rhizodeposition und Pflanzenverfügbarkeit von Nährstoffen und Schwermetallen, 13–14. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-91216-9_1.

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Domański, Grzegorz, Yakov Kuzyakov, and Karl Stahr. "Total and Labelled CO2 Emission and 14C Partitioning as Affected by Streptomycin and Benomyl." In Durchwurzelung, Rhizodeposition und Pflanzenverfügbarkeit von Nährstoffen und Schwermetallen, 84–89. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-91216-9_10.

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Domeyer, Kay, and Heinrich W. Scherer. "Arylsulfatase-Aktivität in der Rhizosphäre von Raps und Weizen." In Durchwurzelung, Rhizodeposition und Pflanzenverfügbarkeit von Nährstoffen und Schwermetallen, 93–99. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-91216-9_11.

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Yan, Feng, and Sven Schubert. "Protonenbilanz in einem Pflanzen-Boden-System." In Durchwurzelung, Rhizodeposition und Pflanzenverfügbarkeit von Nährstoffen und Schwermetallen, 100. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-91216-9_12.

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Raskatov, Alexej V., Yakov Kuzyakov, and Martin Kaupenjohann. "Distribution and Diffusion of Root Exudates of Zea mays in Soil." In Durchwurzelung, Rhizodeposition und Pflanzenverfügbarkeit von Nährstoffen und Schwermetallen, 101–7. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-91216-9_13.

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Deubel, Annette, Joachim Schulze, Heidrun Beschow, and Wolfgang Merbach. "15N- und 14C-markierte Wurzelabscheidungen von Sommerweizen im generativen Stadium." In Durchwurzelung, Rhizodeposition und Pflanzenverfügbarkeit von Nährstoffen und Schwermetallen, 108–15. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-91216-9_14.

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Augustin, Jürgen, Jörg Plugge, Jürgen Pörschmann, Rainer Remus, Katja Hüve, Birgit W. Hütsch, and Wolfgang Merbach. "Methodik zur Quantifizierung des Eintrages von Wurzelzellwandresten in den Boden während des Wachstums von Maispflanzen." In Durchwurzelung, Rhizodeposition und Pflanzenverfügbarkeit von Nährstoffen und Schwermetallen, 116–23. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-91216-9_15.

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Domeyer, Kay, Gerhard Welp, and Heinrich W. Scherer. "Schwermetall-Verarmung in der Rhizosphäre verschiedener Kulturpflanzen — Erste Ergebnisse." In Durchwurzelung, Rhizodeposition und Pflanzenverfügbarkeit von Nährstoffen und Schwermetallen, 127–34. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-91216-9_16.

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Jäger, Richard, Heinz Christian Fründ, Andreas Gransee, and Wolfgang Merbach. "Mobilisierung von Cadmium im Boden durch Wurzelabscheidungen von Mais und Spinat." In Durchwurzelung, Rhizodeposition und Pflanzenverfügbarkeit von Nährstoffen und Schwermetallen, 135–41. Wiesbaden: Vieweg+Teubner Verlag, 2002. http://dx.doi.org/10.1007/978-3-322-91216-9_17.

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Conference papers on the topic "91A16":

1

"Front Matter: Volume 9116." In SPIE Sensing Technology + Applications. SPIE, 2014. http://dx.doi.org/10.1117/12.2072970.

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Baturin, Oleg, Aleksandr Krivtsov, Daria Kolmakova, and Grigorii Popov. "Estimation of the Hydraulic Losses in the Work Shaft of a Gas Turbine Engine of a Gas Compressor Unit Under Various Operating Conditions." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91316.

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Abstract The paper presents the results of numerical simulation of air flow through a modernized variant of the inlet filter unit (IFU) of the gas compressor unit GPA-Ts-16. A feature of the IFU design is that to reduce the load on the filter unit, it is proposed to be as compact as possible, which determines its complex shape. The goal of the study is to study the hydraulic losses and to develop the measures to reduce them, since it is found that every 100 Pa of losses in the inlet unit increases the consumption of fuel gas by 2.5 kg/h or reduces the engine power by 10.5 kW. Calculations of hydraulic losses in IFU are carried out for cases of absence or presence of wind with a velocity from 0 to 35 m/s, blowing from 5 main directions (0°, 45°, 90°, 135°, 180°). Studies are also carried out on the effect of the weather shield shape, presence of baffles under it, and the rack in the shaft on the hydraulic losses. As a result of the research, recommendations are provided for designing (changing the shape) of the inlet filter unit that eventually allow to propose a design that will reduce the hydraulic losses in IFU by 15% relative to the originally suggested variant.
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Degeneve, A., C. Mirat, J. Caudal, R. Vicquelin, and T. Schuller. "Effects of Swirl on the Stabilization of Non-Premixed Oxygen Enriched Flames Above Coaxial Injectors." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91516.

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Abstract An experimental study is carried out to analyze effects of swirl on the structure and stabilization of methane non-premixed oxygen-enriched flames above a co-axial injector in which the two streams are eventually swirled. The mean position of the flame and the liftoff height above the injector lips are investigated with OH* chemiluminescence images. The oxygen enrichement, the momentum flux ratio between the two co-flows, the swirl level inside the central jet and the swirl level in the annular jet are varied over a large range of operating conditions. It is found that, in the absence of swirl in the central stream, the flame is always attached to the lips of the internal injection tube. As the inner swirl level increases, the flame front located at the lips of the internal injection tube disappears. When the annular swirl level is high enough to create a central recirculating bubble, the flame detaches from the nozzle rim and remains lifted at a finite distance above the injector. Increasing the oxygen concentration shifts this transition to smaller momentum flux ratios and smaller annular swirl levels. The lift-off distance can be finely tuned and depends on the inner and outer swirl levels, and on the momentum flux ratio between the two coaxial streams. It is shown that this feature neither depends on the confinement of the injector nor on the thermal stress exerted by the hot burnt gases on the injector back plane. About 1000 configurations were investigated that could be classified into only four distinct stabilization modes, in which the flame structure was shown to follow a similar pathway when the momentum flux ratio between the two streams, the swirl level in the central and external streams and the quarl angle of the annular stream are varied. It is finally shown how these limits are altered when the oxygen concentration in the annular oxidizer stream is varied from air to oxygen-enriched operation.
4

Bellocchio, Andrew T., Michael J. Benson, Bret P. Van Poppel, Seth A. Norberg, and Ryan Benz. "An Enhanced Gas Turbine Engine Laboratory: A Learning Platform Supporting an Undergraduate Engineering Curriculum." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91616.

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Abstract A gas turbine engine has supported the U.S. Military Academy’s mechanical engineering program for nearly three decades. Recent, substantial enhancements to the engine, controls, and data acquisition systems greatly increased the student experience by leveraging its broad capabilities beyond the original laboratory learning objectives. In this way, the laboratory served as a learning platform for more than just instruction on gas turbine fundamentals and the Brayton cycle. The engine is a refurbished auxiliary power unit from Pratt & Whitney Aeropower, installed in the Embrauer 120 and similar to a unit installed on a U.S. Army helicopter. Whereas the original laboratory experience permitted students to test the engine at three different loads applied by a water brake dynamometer, the revised experience allowed for a broader range of test conditions. The original laboratory included single point measurements of three temperatures and two pressures, along with the fuel flow rate, dynamometer torque, and engine speed. The revised laboratory allowed the user to vary bleed air and engine loads across an operational envelope at a user-specified acquisition rate. The improved data acquisition system used LabVIEW™ and included multiple state sensors for pressure, temperature, fuel flow, bleed air, and dynamometer performance, thereby enabling a more complete analysis by accounting for the energy transported by bleed airflow and absorbed by the water brake. Students then quantified the uncertainty in their measurements and analysis. The new emphasis on uncertainty quantification, part of a program-level initiative, challenged students’ notion of “substitute and solve” while also familiarizing them with large, experimental data sets. The re-envisioned laboratory raised the students’ level in the cognitive domain and served as their premier engine experience. Rather than merely observing engine adjustments across a small range of conditions, students designed their own laboratory experience. With the updated approach, students viewed a graphic of the turbine’s laboratory operating range and chose the key variables of interest — selecting data points within the laboratory operating range — and then justified their selections. The enhanced experience added analysis of flow exergy and exergetic efficiency. The exercise also challenged students to hypothesize why actual turbine performance was less than predicted and determine sources of error and uncertainty. Moreover, the new laboratory offers opportunities to expand the turbine engine’s utility from supporting a single thermal-fluids course to a multidisciplinary learning platform. Concluding remarks address concepts for augmenting course instruction in other courses within the curriculum, including heat transfer, mechanical vibrations, and dynamic modeling and controls.
5

Freire-Gormaly, M., H. MacLean, and A. Bazylak. "MicroCT Investigations and Pore Network Reconstructions of Limestone and Carbonate-Based Rocks for Deep Geologic Carbon Sequestration." In ASME 2012 6th International Conference on Energy Sustainability collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/es2012-91116.

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In this paper, we characterized the microstructure of Indiana Limestone rock samples using X-ray micro-computed tomography (microCT) measurements. Our preliminary results include the porosity, and three-dimensional pore reconstructions for each sample. The resulting porosity values are consistent with experimental permeability tests.
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Diaz, German Amador, John Turizo Santos, Elkin Hernandez, Ricardo Vasquez Padilla, and Lesme Corredor. "Maximum Power From Fluid Flow: Results From the First and Second Laws of Thermodynamics." In ASME 2012 6th International Conference on Energy Sustainability collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/es2012-91216.

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The heat transfer principle of power maximization in power plants with heat transfer irreversibilities was cleverly extended by Bejan [1] to fluid flow, by obtaining that the energy conversion efficiency at maximum power is ηmax = 1/2(1 − P2/P1). This result is analog to the efficiency at maximum power for power plants, ηmax = 1 − (T2/T1)1/2 which was deduced by Curzon and Ahlborn [2]. In this paper, the analysis to obtain maximum power output delivered from a piston between two pressure reservoir across linear flow resistance is generalized by considering the piston cylinder friction, by obtaining relations of maximum power output and optimal speed of the piston in terms of first law efficiency. Expressions to relate the power output, cross sectional area of the chamber and first law efficiency, were deduced in order to evaluate the influence of the overall size constraints and fluid regime in the performance of the piston cylinder system. Flow in circular ducts and developed laminar flow between parallel plates, are considered to demonstrate that when two pressure reservoirs oriented in counterflow, with different and arbitrary cross sectional area, must have the same area in order to maximize the power output of the system. These results introduce some modifications to the results obtained by Bejan [1] and Chen [3]. This paper extends the Bejan and Chen’s work by estimating under turbulent regime the lost available work rate associated with the degree of irreversibilities caused by the flow resistances of the system. This analysis is equivalent to evaluate the irreversibilities in an endoirreversible Carnot heat engine model caused by the heat resistance loss between the engine and its surrounding heat reservoirs. This paper concludes with an application to illustrate the practical applications by estimating the lost available work of an actual steady-flow turbine and the layout pipes upstream and downstream of the same device.
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Laca, Paul J., and Richard A. Wirtz. "Flow Boiling of Sub-Cooled Pentane on a Micro-Porous Coating." In ASME 2012 6th International Conference on Energy Sustainability collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/es2012-91316.

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Flow boiling experiments with sub-cooled Isopentane and n-Pentane at 3.0bar pressure assess the utility of compressed copper- and steel-filament screen laminate surface coatings as high performance boiling surfaces. High-speed video show that at high heat flux ebullition is unsteady. Isopentane and n-Pentane are found to produce nearly identical boiling characteristic curves. At the same applied heat flux, the superheat of copper filament coatings are much smaller than the steel filament coating superheats.
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Nithyanandam, Karthik, and Ranga Pitchumani. "Numerical Analysis of Latent Thermal Energy Storage System With Embedded Thermosyphons." In ASME 2012 6th International Conference on Energy Sustainability collocated with the ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/es2012-91416.

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Latent thermal energy storage (LTES) system offers high energy storage density and nearly isothermal operation for concentrating solar power generation. However, the low thermal conductivity possessed by the phase change material (PCM) used in LTES system limits the heat transfer rates. Utilizing thermosyphons to charge or discharge a LTES system offers a promising engineering solution to compensate for the low thermal conductivity of the PCM. The present work numerically investigates the enhancement in the thermal performance of charging and discharging process of LTES system by embedding thermosyphons. A transient, computational analysis of the LTES system with embedded thermosyphons is performed for both charging and discharging cycles. The influence of the design configuration of the system and the arrangement of the thermosyphons on the charge and discharge performance of the LTES installed in a concentrating solar power plant (CSP) is analyzed to identify configurations that lead to improved effectiveness.
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Yu, Liangyao, Ruoqi Wang, and Yiming Cheng. "Real Driving Route Simulation for Intelligent Traffic Modelling." In ASME 2022 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/detc2022-91316.

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Abstract With the development of intelligent vehicle driving, the vehicles must be trained through deep learning method. Therefore, the vehicles will be driven on real roads and subjected to traffic and environmental conditions, such as traffic lights, traffic jams, rounds, stops, curves, road condition and gradient. The on-road driving tests make it difficult to predefine beforehand the route, since the conditions are changeable and unpredictable. On the other hand, it is quite time-consuming and expensive. However, the generation of methods and algorithms able to read the main important parameters from the route (speed and gradient profile) would give a twofold benefit: generation and optimization or appropriate routes considering the testing objective, and if a powertrain model available, simulation of vehicle performance and emissions. In such a context, this thesis aims to generate real driving speed profiles based on either Google Maps guidance or GPX experiment data, considering speed limit, curvature and traffic condition. Real driving cycle generation from the on-line platform Google Maps and GPX data shows advantage over traditional experimental data characterization in aspects of cost, universality and convenience. Based on this approach, it is possible to analyze the influence of driver characteristics, curvature and traffic condition on driving behavior, emissions and fuel consumption, supporting in the phase of intelligent vehicle strategy development. The generated profile is compared to real driving recorded GPX data and is verified to be generally realistic.
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Probst, Daniel, Nitesh Attal, Raju Mandhapati, and Oshin Avanessian. "Predicting Combustion Variability Using Machine Learning From the Flow Field Data at Spark Timing for a Gasoline Direct Injection Engine." In ASME 2022 ICE Forward Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icef2022-91016.

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Abstract Machine learning was used to predict three combustion metrics based on the flow field data at spark angle (SA), obtained from large eddy simulations (LES). These metrics were peak cylinder pressure (PCP), crank angle of PCP (CA of PCP), and indicated mean effective pressure (IMEP). The ML model was evaluated for use as a surrogate for detailed combustion model in studies of cycle-to-cycle variation (CCV). The computational time for combustion predictions (from SA to exhaust valve opening (EVO)) was 15 hours on 24 cores while the trained ML model was able to make predictions in 3 seconds (a speed up factor of 7200). The ML model was trained on a single core in 45 minutes using 88 LES simulation cycles. As the LES simulation data at SA has high fidelity (in this case approximately 260,000 computational cells) a workflow to filter the data to a reasonably sized feature set for use in ML was developed. Subvolumes were defined and the Pearson Correlation Coefficient (PCC) was used to evaluate the features. An ensemble ML approach was employed, which combines the predictions of multiple base learners to improve the final prediction. The ML model predictions for the three combustion metrics showed good correlation with the CFD simulations.

Reports on the topic "91A16":

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Frazier, Marvin J., Nick Simeakis, and Alan D. Zdunek. PR-208-9116-R01 Investigation of Cased-Carrier-Pipe External Corrosion. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), January 1994. http://dx.doi.org/10.55274/r0011922.

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This project addresses the need to identify key factors that can contribute to corrosion of cased pipelines and develop methods for quantifying the severity of corrosion. The approach followed in the 1992 research was to deploy specially-designed sensor packages to monitor the environment within the annulus region of two cased pipelines in the field. The sensors were selected to characterize the corrosion that may occur from either groundwater ingress or the atmosphere within the casing to the pipe annulus region.

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