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Автор: Grafiati
Опубліковано: 7 липня 2024
Оновлено: 7 липня 2024

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Статті в журналах з теми "Etmm":

1

Chatterji, Madhabi, Young Ae Kwon, and Clarice Sng. "Gathering evidence on an after-school supplemental instruction program: Design challenges and early findings in light of NCLB." education policy analysis archives 14 (May 2, 2006): 12. http://dx.doi.org/10.14507/epaa.v14n12.2006.

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The No Child Left Behind (NCLB) Act of 2001 requires that public schools adopt research-supported programs and practices, with a strong recommendation for randomized controlled trials (RCTs) as the “gold standard” for scientific rigor in empirical research. Within that policy framework, this paper compares the relative utility of federally-recommended RCT versus the demonstrated extended term mixed-method (ETMM) designs as options for monitoring effects of novel programs in real-time field settings. Guided by the program’s theory of action, a year-long, two-phase study was conducted to monitor the context, processes and early outcomes of an after-school supplemental program in a New York elementary school. In both phases, the design combined a matched-groups, quasi-experiment with qualitative classroom observations and descriptive surveys. Early findings showed some positive, albeit “gross” program effects. Although findings are tentative, the ETMM approach enhanced interpretations by shedding light on relevant environmental variables, causes for program instabilities and sample attrition, and factors affecting treatment fidelity and scaling-up of the program beyond the pilot year.
2

Heir, Jagtar Singh, Anupamjeet Kaur Sekhon, Dilip R. Thakar, Timothy A. Jackson, Javier D. Lasala, and Ronaldo V. Purugganan. "External Tracheal Manipulation Maneuver (ETMM) to Facilitate Endobronchial Blocker Placement." Journal of Cardiothoracic and Vascular Anesthesia 30, no. 4 (August 2016): 1061–63. http://dx.doi.org/10.1053/j.jvca.2015.11.005.

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3

Ji, Chao, Yanke Yao, Jianqiang Duan, and Wenxing Li. "Sustainable Mechanism of the Entrusted Transportation Management Mode on High-Speed Rail and the Impact of COVID-19: A Case Study of the Beijing–Shanghai High-Speed Rail." Sustainability 14, no. 3 (January 20, 2022): 1171. http://dx.doi.org/10.3390/su14031171.

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The transport management mode fundamentally determines the sustainable development of high-speed rail passenger transport (HSRPT), which was shocked by the COVID-19 pandemic in 2020. In order to study the sustainable development mechanism of HSRPT and the impact of COVID-19, primarily based on the data from the Beijing–Shanghai high-speed rail (HSR) taken from 2018, we adopt system dynamics (SD) to provide a scenario simulation method to examination sustainable operation status of HSRPT under the entrusted transportation management mode (ETMM) by VENSIM, and take into account the following two evaluation indicators: economic and operational. The results show the following: (1) Transportation demand and commissioned transportation management fees play a vital role in the sustainable operation of the Beijing–Shanghai HSR, causing significant changes in transportation revenue and transportation costs. (2) COVID-19 had a great impact on the sustainable operation of the Beijing–Shanghai HSR. In 2020, the turnover and transportation profit of the Beijing–Shanghai HSR fell by 74.31% and 49.19%, respectively. In 2022, the transportation profit can be restored to the level of 2019. The study results reveal that Beijing–Shanghai HSR under the ETMM has a good sustainable development capability.
4

Kumar, Sachin, Antony Michealraj, Leo Kim, Jeremy Rich, and Michael Taylor. "ETMM-08 METABOLIC REGULATION OF THE EPIGENOME DRIVES LETHAL INFANTILE EPENDYMOMA." Neuro-Oncology Advances 3, Supplement_1 (March 1, 2021): i15—i16. http://dx.doi.org/10.1093/noajnl/vdab024.064.

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Abstract Ependymomas are malignant glial tumours that occur throughout the central nervous system. Of the nine distinct molecular subgroups of ependymoma, Posterior Fossa A (PFA), is the most prevalent, occurring in the hindbrain of infants and young children. Lacking highly recurrent somatic mutations, PFAs are thought to be a largely epigenetically driven entity, defined by hypomethylation at the histone 3 lysine 27 residue. Previous transcriptional analysis of PFAs revealed an enrichment of hypoxia signaling genes. Thus, we hypothesized that hypoxic signaling, in combination with a unique metabolic milieu, drive PFA oncogenesis through epigenetic regulation. In this study, we identified that PFA cells control the availability of specific metabolites under hypoxic conditions, resulting in diminished H3K27 trimethylation and increased H3K27 acetylation in vitro and in vivo. Unique to PFA cells, transient exposure to ambient oxygen results in irreversible cellular toxicity. Furthermore, perturbation of key metabolic pathways is sufficient to inhibit growth of PFA primary cultures in vitro. PFA cells sequester s-adenosylmethionine while upregulating EZHIP, a polycomb repressive complex 2 (PRC2) inhibitor, resulting in decreased H3K27 trimethylation. Furthermore, hypoxia fine-tunes the abundance of alpha-ketoglutarate and acetyl-CoA to fuel demethylase and acetyltransferase activity. Paradoxically, a genome-wide CRISPR knockout screen identified the core components of PRC2 as uniquely essential in PFAs. Our findings suggest that PFAs thrive in a narrow “Goldilocks” zone, whereby they must maintain a unique epigenome and deviation to increased or decreased H3K27 trimethylation results in diminished cellular fitness. Previously, we showed that PFAs have a putative cell of origin arising in the first trimester of development. Using single-cell RNAseq and metabolomics, we demonstrate that PFAs resemble the natural metabolic-hypoxic milieu of normal development. Therefore, targeting metabolism and/or the epigenome presents a unique opportunity for rational therapy for infants with PFA ependymoma.
5

Garcia, Joseph H., Saket Jain, Erin A. Akins, Angad S. Beniwal, Kayla J. Wolfe, Jungwha Cha, Sanjay Kumar, and Manish K. Aghi. "ETMM-09 TARGETING GLIOBLASTOMA MULTIFORME METABOLISM AT THE INVASIVE TUMOR FRONT." Neuro-Oncology Advances 3, Supplement_1 (March 1, 2021): i16. http://dx.doi.org/10.1093/noajnl/vdab024.065.

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Abstract Glioblastoma (GBM) is a primary malignant brain tumor with a median survival under two years. The poor prognosis GBM caries is largely due to cellular invasion, which enables escape from resection and drives inevitable recurrence. Numerous factors have been proposed as the primary driving forces behind GBM’s ability to invade adjacent tissues rapidly, including alterations in its cellular metabolism. Though studies have investigated links between GBM’s metabolic profile and its invasive capabilities, these studies have had two notable limitations. First, while infiltrating GBM cells utilize adaptive cellular machinery to overcome stressors in their microenvironment, the cells at the invasive tumor front have rarely been sampled in previous studies, which have primarily used banked tissue taken from the readily accessible tumor core. Second, studies of invasion have primarily used two-dimensional (2D) culture systems, which fail to capture the dimensionality, mechanics, and heterogeneity of GBM invasion. To address these limitations, our team developed two complementary approaches: acquisition of site-directed biopsies from patient GBMs to define regional heterogeneity in invasiveness, and engineering of three dimensional (3D) platforms to study invasion in culture. Through utilization of these platforms, and by taking advantage of the system-wide, unbiased screens of metabolite profile and gene expression available, our team looked to accomplish the goal of identifying targetable metabolic factors which drive cellular invasion in GBM. Pilot RNA-Sequencing data revealed 87 of the top 250 (35%) genes preferentially expressed in the tumor invasive edge, and 30 of the top 250 (12%) genes preferentially expressed in the tumor core were involved in cellular metabolism. KEGG pathways analysis demonstrated enrichment of glycolytic, pentose phosphate, and response to amino acid starvation pathways at the tumor invasive edge. These preliminary studies demonstrate a distinct metabolic phenotype in invasive GBM cells which will be further explored with system wide screens.
6

Torrini, Consuelo, Trang Nguyen, Chang Shu, Angeliki Mela, Nelson Humala, Aayushi Mahajan, Georg Karpel-Massler, Jeffrey Bruce, Peter Canoll, and Markus Siegelin. "ETMM-05. LACTIC ACID FACILITATES GLIOBLASTOMA GROWTH THROUGH MODULATION OF THE EPIGENOME." Neuro-Oncology Advances 3, Supplement_1 (March 1, 2021): i15. http://dx.doi.org/10.1093/noajnl/vdab024.061.

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Abstract Glioblastoma (GBM) is the most common primary malignant brain tumor with an unfavorable prognosis. While GBMs utilize glucose, there are other carbon sources at their disposal. Lactate accumulates to a significant amount in the infiltrative margin of GBMs. In the current study, we demonstrated that lactate rescued patient-derived xenograft (PDX) GBM cells from nutrient deprivation mediated cell death and inhibition of growth. Transcriptome analysis, ATAC-seq and CHIP-seq. showed that lactic acid exposure entertained a signature of cell cycle progression and oxidative phosphorylation (OXPHOS) /tricarboxylic acid (TCA)-cycle. LC/MS analysis demonstrated that U-13C-Lactate elicited substantial labeling of TCA-cycle metabolites, acetyl-CoA and histone protein acetyl-residues in PDX derived GBM cells. Given that acetyl-CoA is pivotal for histone acetylation we observed a dose-dependent elevation of histone marks (e.g. H3K27ac), which was rescued by genetic and pharmacological inhibition of lactic acid-uptake, ATP-citrate lyase, p300 histone-acetyl-transferase and OXPHOS, resulting in reversal of lactate mediated protection from cell death. CHIP-seq. analysis demonstrated that lactic acid facilitated enhanced binding of H3K27ac to gene promoters and cis-regulatory elements. Consistently, ATAC-seq. analysis highlighted enhanced accessibility of the chromatin by lactic acid. In a combined tracer experiment (U-13C-glucose and 3-C13-lactate), we made the fundamental observation that lactic acid carbons were predominantly labeling the TCA cycle metabolites over glucose, implying a critical role of lactic acid in GBMs. Finally, pharmacological blockage of the TCA-cycle, using a clinically validated drug, extended overall survival in an orthotopic PDX model in mice without induction of toxicity, implying a critical role of lactic acid in GBMs and establishing lactic acid metabolism as a novel drug target for GBM.
7

Minami, Jenna, Nicholas Bayley, Christopher Tse, Henan Zhu, Danielle Morrow, William Yong, Linda Liau, Timothy F. Cloughesy, Thomas Graeber, and David A. Nathanson. "ETMM-02. PRECLINICAL MODELS REVEAL BRAIN-MICROENVIRONMENT SPECIFIC METABOLIC DEPENDENCIES IN GLIOBLASTOMA." Neuro-Oncology Advances 3, Supplement_1 (March 1, 2021): i14. http://dx.doi.org/10.1093/noajnl/vdab024.058.

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Abstract Metabolic reprogramming is a hallmark of cancer, and malignant cells must acquire metabolic adaptations in response to a multitude of intrinsic and extrinsic factors to fuel neoplastic progression. Mutations or changes in metabolic gene expression can impose nutrient dependencies in tumors, and even in the absence of metabolic defects, cancer cells can become auxotrophic for particular nutrients or metabolic byproducts generated by other cells in the tumor microenvironment (TME). Conventional cell lines do not recapitulate the metabolic heterogeneity of glioblastoma (GBM), while primary cultured cells do not account for the influences of the microenvironment and the blood brain barrier on tumor biology. Additionally, these systems are under strong selective pressure divergent from that in vivo, leading to reduced heterogeneity between cultured tumor cells. Here, we describe a biobank of direct-from-patient derived orthotopic xenografts (GliomaPDOX) and gliomaspheres that reveal a subset of gliomas that, while able to form in vivo, cannot survive in vitro. RNA sequencing of tumors that can form both in vivo and in vitro (termed “TME-Indifferent”) compared to that of tumors that can only form in vivo (termed “TME-Dependent”) revealed transcriptional changes associated with altered nutrient availability, emphasizing the unique metabolic programs impacted by the tumor microenvironment. Furthermore, TME-dependent tumors lack metabolic signatures associated with nutrient biosynthesis, thus indicating a potential dependency of these tumors on scavenging specific nutrients from the extracellular milieu. Collectively, these data emphasize the metabolic heterogeneity within GBM and reveal a subset of gliomas that lack metabolic plasticity, indicating a potential brain-microenvironment specific metabolic dependency that can be targeted for therapy.
8

Li, Mao, Shuxin Zhang, Wanchun Yang, Yuan Yang, Dejiang Pang, Qing Mao, Mina Chen, and Yanhui Liu. "ETMM-06. ELEVATED MITOCHONDRIAL TOM20 EXPRESSION SUPPRESSES GLIOMA MALIGNANCY BY ENHANCING OXIDATIVE PHOSPHORYLATION." Neuro-Oncology Advances 3, Supplement_1 (March 1, 2021): i15. http://dx.doi.org/10.1093/noajnl/vdab024.062.

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Abstract BACKGROUND Malignant glioma display a metabolic shift towards aerobic glycolysis with reprogramming of mitochondrial oxidative phosphorylation (OXPHOs). However, the underlying mechanism for this metabolic switch in glioma is not well elucidated. Mitochondrial translocases of the outer/inner membrane (TOMs/TIMs) import proteins into mitochondria, and could thereby regulate OXPHOs. The objective of this study is to investigate the expression of TOM/TIM members in glioma, as well as their functional and therapeutic implications. METHODS Transcriptome sequencing (RNA-seq), real-time PCR, Western blot, and immunohistochemistry were used to identify Tom20 as a significantly downregulated TOM/TIM protein in 20 paired glioma/Peritumoral tissues. To study the biological function of Tom20 in glioma, we interrogated metabolic alterations in Tom20 overexpressed glioma cells by GC-MS metabolomics, acetyl-CoA assay, and Seahorse assay. We compared the cell proliferation and viability profiles between Tom20 overexpressed and control cells in vitro and in vivo. To investigate the therapeutic implication of Tom20 expression, we tested OXPHOs inhibitor metformin in Tom20 overexpressed cells and xenograft mouse models. RESULTS We find that Tom20, a critical component of the mitochondrial outer membrane translocases, is downregulated in malignant gliomas. Using an integrative approach spanning bioinformatic analysis, metabolomics, and functional approaches, we reveal that Tom20 elevation activates mitochondrial OXPHOs in glioma cells and reduces tumor malignancy. We also find that Tom20 upregulation sensitizes glioma cells to metformin in vitro, and improves the therapeutic efficacy of metformin in glioma in vivo. CONCLUSION Our work defines Tom20 as a glioma suppressor and an indicator of metformin treatment in glioma.
9

Li, Kehong, Wenke Wang, Yadong Zhang, Tao Zheng, and Jin Guo. "Game Modelling and Strategy Research on the System Dynamics–based Quadruplicate Evolution for High–speed Railway Operational Safety Supervision System." Sustainability 11, no. 5 (March 1, 2019): 1300. http://dx.doi.org/10.3390/su11051300.

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In view of the entrusted transportation management model (ETMM) of China’s high–speed railway (HSR), the supervision strategy of an HSR company for its multiple agents plays a very important role in ensuring the safety and sustainable development of HSR. Due to the existence of multiple agents in ETMM, the supervision strategy for these agents is usually difficult to formulate. In this study, a quadruplicate HSR safety supervision system evolutionary game model composed of an HSR company and three agents was established through the analysis of the complex game relationship existing in the system. The behavioral characteristics and the steady state of decision–making of all stakeholders involved in the system are proved by evolutionary game theory and system dynamics simulation. The results show that there will be long–term fluctuations in the strategies selected by the four stakeholders in the static reward–penalty control scenario (RPCS), which indicates that an evolutionary stable strategy does not exist. With increases in the reward–penalty coefficient, the fluctuations are intensified. Therefore, the dynamic RPCS was proposed to control the fluctuations, and the simulation was repeated. The results show that the fluctuations can be effectively restrained by adopting the dynamic RPCS, but if the coefficients are the same, the static RPCS is better than the dynamic RPCS for increasing the safety investment rate of the three agents. This demonstrates that the HSR company should apply these two control scenarios flexibly according to the actual situation when formulating a supervision strategy in order to effectively control and enhance the safety level of HSR operations when multiple agents are involved.
10

Chi, Yudan, Jan Remsik, Vaidotas Kiseliovas, Camille Derderian, Ugur Sener, Majdi Alghader, Fadi Saadeh, et al. "ETMM-03. CANCER CELLS DEPLOY LIPOCALIN- 2 TO COLLECT LIMITING IRON IN LEPTOMENINGEAL METASTASIS." Neuro-Oncology Advances 3, Supplement_1 (March 1, 2021): i14. http://dx.doi.org/10.1093/noajnl/vdab024.059.

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Abstract The tumor microenvironment plays a critical regulatory role in cancer progression, especially in central nervous system metastases. Cancer cells within the cerebrospinal fluid (CSF)-filled leptomeninges face substantial microenvironmental challenges, including inflammation and sparse micronutrients. To investigate the mechanism by which cancer cells in these leptomeningeal metastases (LM) overcome these constraints, we subjected CSF from five patients with LM to single-cell RNA sequencing. We found that cancer cells, but not macrophages, within the CSF express the iron-binding protein lipocalin-2 (LCN2) and its receptor SCL22A17. These macrophages generate inflammatory cytokines that induce cancer cell LCN2 expression but do not generate LCN2 themselves. In mouse models of LM, cancer cell growth is supported by the LCN2/SLC22A17 system and is inhibited by iron chelation therapy. A Phase Ia/1b clinical trial focused on this novel treatment approach is underway.
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Статті в журналах Дисертації Книги

Дисертації з теми "Etmm":

1

Regis, Julie. "Impact des hypoxies sur la mobilité des nutriments et ETMM présents dans les sédiments des lagunes méditerranéennes." Electronic Thesis or Diss., Nîmes, 2024. http://www.theses.fr/2024NIME0002.

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La concentration en oxygène dans la colonne d’eau est le principal facteur de contrôle de l’ensemble des réactions biogéochimiques dans les sédiments de surface et les transferts à l’interface eau-sédiment (IES) des nutriments, métaux et métalloïdes (ETMM). Trois lagunes de la façade méditerranéenne française (Berre, Thau et Prévost) font parties des zones côtières eutrophisées et impactées par des épisodes d’hypoxie dans le monde et ont de fortes accumulations de nutriments et d’ETMM dans les sédiments. Elles sont aussi caractérisées par des habitats benthiques différents incluant pour certaines la présence de macrophytes, dont le rôle de régulateur de flux de nutriments à l’IES a été démontré. Cette thèse vise à mieux comprendre l’impact des désoxygénations sur la mobilité des nutriments et ETMM contenus dans les sédiments des lagunes méditerranéennes, en présence de différents habitats benthiques représentant leur gradient d’eutrophisation. Les résultats montrent que la lagune de Berre est le site le plus impacté par des épisodes de désoxygénation de longue durée (1 semaine) et saisonniers, la lagune du Prévost présente de grandes variations nycthémérales passant de l’hypoxie à l’hyperoxie en moins de 12 h en saison estivale, et le site de la lagune de Thau semble le plus résilient vis à vis des problématiques de désoxygénation qui restent épisodiques. En conditions estivales, les profils de concentrations des sédiments et eaux porales indiquent des enrichissements en nutriments et en sulfures dans les substrats des habitats benthiques des lagunes aux statuts d’eutrophisation les plus avancés (Berre et Prévost) et également en présence de macroalgues (Prévost et Thau). Ces enrichissements sont issus d’une forte minéralisation de la matière organique et les conditions plus réductrices dans ces habitats fixent les ETMM (As, Sb, Cd, Pb, Zn, Ni, Cu, Co, Hgtot) à la phase solide du sédiment. La comparaison aux seuils environnementaux disponibles permet d’identifier les habitats de la lagune de Berre fortement a risque vis à vis du soutien de l’eutrophisation, de la remobilisation des ETMM à l’IES et du risque écotoxicologique. L’acquisition de gradients de concentration en oxygène dissous, au sein de la couche limite benthique (BBL) à haute résolution temporelle, a permis d’identifier la forte demande en oxygène des sédiments de la lagune de Berre et les désoxygénations nocturnes issues de la présence des macroalgues opportunistes sur la lagune du Prévost. L’acquisition ponctuelle, de gradients de concentration, illustre des exports de nutriments du sédiment vers la colonne d’eau plus intenses en conditions anoxiques et euxiniques ainsi que des exports de Mn, Fe, As, Co en conditions hypoxiques. A l’inverse, les gradients en conditions euxiniques indiquent des situations de piégeage d’ETMM (Mn, Fe, Cu, Mo) avec les phases sulfurées du sédiment. En parallèle, les expérimentations in situ et ex situ d’incubation en conditions de désoxygénation "forcées" pour les différents habitats benthiques présents dans ces trois sites, ont permis d’obtenir des flux à l’IES qui suivent également cette tendance. Une intensification des flux en nutriments suivant la désoxygénation a été mesurée dans les habitats sédiment nu impacté par la désoxygénation (Berre) et pour les habitats comportant des macroalgues pérennes (Thau) et opportunistes (Prévost). Pour ces mêmes habitats les exports d’ETMM (Mn, Fe, As, Co, V ,Mo) les plus intenses ont été mesurés en conditions hypoxiques et anoxiques et à l’inverse, des diminution et inversion des flux en conditions euxiniques. Cette approche comparative et expérimentale de terrain apporte le point de vue intégratif de la biogéochimie sur la qualité chimique des sédiments de ces milieux lagunaires en cours de re-oligotrophisation. Permettant de contextualiser leur grande variabilité temporelle et spatiale ainsi que leur vulnérabilité face aux changements climatiques
Studies carried out in recent years have shown that oxygen concentration in the water column is the main factor controlling all biogeochemical reactions in surface sediment, as well as controlling transfers of nutrients, trace elements (TE) at the sediment water interface (SWI). Three lagoons on France’s Mediterranean coast (Berre, Thau and Prévost) are among the world’s most eutrophied coastal zones impacted by hypoxia episodes, with high accumulations of nutrients, metals and metalloids in their sediment. They are also characterized by different benthic habitats, some of which include macrophytes, which have been shown to regulate nutrient flux at IES. This thesis project aims to better understand the impact of deoxygenation phenomena on the mobility of nutrients and TE present in Mediterranean lagoon sediment, in the presence of different benthic habitats representing their eutrophication gradient. The results show that the Berre lagoon is the site most impacted by long-lasting (1 week) and seasonal episodes of deoxygenation; the Prévost lagoon exhibits wide nycthemeral variations, going from hypoxia to hyperoxia in less than 12 h during the summer season; the Thau lagoon site seems the most resilient about deoxygenation. Under summer conditions, sediment and porewater concentrationprofiles show enrichments in nutrients and sulfides in the substrates of benthic habitats in lagoons with the most advanced eutrophication status (Berre and Prévost), and also in the presence of macroalgae (Prévost and Thau). These enrichments are the result of strong organic matter mineralization, and the more reducing conditions in these habitats binding the TE (As, Sb, Cd, Pb, Zn, Ni, Cu, Co, Hgtot) to the solid phase of the sediment. Comparison with available environmental thresholds enables us to identify habitats in the Berre lagoon that are highly at risk in terms of eutrophication support, remobilization of TE at SWI and ecotoxicological risk. The acquisition of dissolved oxygen concentration gradients within the benthic boundary layer (BBL) at high temporal resolution has enabled us to identify the high oxygen demand of sediment in the Berre lagoon and the nighttime deoxygenations resulting from the presence of opportunistic macroalgae in the Prévost lagoon. The punctual acquisition of concentration gradients illustrates nutrient exports from the sediment to the water column that are more intense under anoxic and euxinic conditions, and exports ofMn, Fe, As, Co under hypoxic conditions. However, concentration gradients under euxinic conditions indicate the trapping of TE (Mn, Fe, Cu,Mo) with the sulfide phases of the sediment. In addition, in situ and ex situ incubation experiments under "forced" deoxygenation conditions for the various benthic habitats present at these three sites yielded SWI fluxes that also followed this trend. Nutrient fluxes were shown to intensify following deoxygenation in eutrophied bare sediment habitats affected by deoxygenation (Berre) and specifically in habitats containing opportunistic (Prévost) and perennial (Thau) macroalgae. For these same habitats, the most intense exports of TE (Mn, Fe, As, Co, V , Mo) were measured under hypoxic and anoxic conditions, while fluxes decreased or reversed under euxinic conditions. This comparative and experimental field approach brings an integrative biogeochemical perspective on the chemical quality of sediment in lagoon environments undergoing re-oligotrophication. It provides a context for their great temporal variability, as well as their vulnerability to climate change
2

Grimanelli, de Besses Marie. "Contribution à l'analyse des qualifications : le cas des ETAM comptables." Grenoble 2, 1990. http://www.theses.fr/1990GRE21016.

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La these propose une analyse des qualifications, d'un point de vue dynamique, concernant les etam comptables. L'approche est essentiellement empirique. La premiere partie presente les concepts utilises: dynamique des qualifications, relations entre technologie et qualifications, gestion des qualific actions par les entreprises. La seconde partie analyse l'evolution generale de la qualification en comptabilite sous trois angles: - une analyse des taches, - les statistiques de l'emploi (repartion par branches, par niveau de qualifications, par niveau de formation), - transformations dans le systeme de formation initiale. La troisieme partie est le rapport d'observations directes dans 8 entreprises, aux caracteristiques differentes. On peut resumer les principaux resultats en trois points: - l'approche dynamique des qualifications permet de comprendre quelques situations paradoxales en matiere d'emploi, telles que la concomittance entre un haut niveau de chomage et une penurie en matiere de qualifications. - les emplois de comptabilite sont en profonde transformation. En meme temps, et de facon interactive, la demande des entreprises en comptabilite interne specifique augmente rapidement, et les nouvelles technologies de l'information ermettent cette croissance avec des couts decroissants. Cependant, les differents modes de gestion des qualifications dans les entreprises ont une grande responsabilite, enterme de resultats de ces evolutions sur les qualifications de l'emploi
The study's purpose is an analyse, in a dynamic view, of law and intermediate qualifications in accounting job. The approach is empirical in the main part. The first part presents the concepts used: dynamic system of sualifications, relations between technology and qualifications, qualifications in the firms. The second part analysis the general evolution of accounting qualifications with three viewpoint: - an analysis of tasks, - employment statistics (divide by economics branches, by qualification level, by school level - transformation in the school system. The third part is the report of directs observations in 8 firms, with differents characters. We can summarize the main results inthree points: - the dynamic approach of qualifications allows to understand some paradoxals cases in matter of employment: as the conjunction between high level of unemployment with lack of qualifications. - the accounting job desing is in a deep transformation. In the same time, and in an interactive way, the firms'demand in internal and specific accounting increase fastly and the news information's technologies allow this increasing with decreasing units costs. - instead, the differents ways of qualifications'management inthe firms have an high responsability in the results of this transformations in the matter of qualifications
3

Charbeau, Lidwine. "Inégalités de carrières entre hommes et femmes. Une approche par les conventions d'évaluation. Analyse des trajectoires professionnelles des cadres et ETAM chez un constructeur automobile." Thesis, Paris 10, 2009. http://www.theses.fr/2009PA100184.

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Plutôt que de réduire les inégalités professionnelles entre hommes et femmes à un problème de choix, d’incitations ou de pure discrimination, nous proposons d’examiner ce phénomène à travers la question de l’évaluation du travail. L’approche conventionnaliste mobilisée accorde une place majeure au processus d’évaluation de la qualité du travail : celui-ci ne se résume pas à une simple coordination des acteurs autour d’un critère de sélection, il mobilise une représentation collective et consensuelle du « bon » salarié, i.e. une convention de qualité. Une même entreprise est traversée par une pluralité de conventions de qualité. Nous faisons l’hypothèse que la mobilisation de certaines d’entre elles explique l’exclusion durable des femmes de certains postes (le plafond de verre) ou de certaines filières évolutives. Une étude économétrique de la progression des cadres et des ETAM chez un constructeur automobile est proposée. Elle permet d’isoler les déterminants objectifs des carrières, considérés comme autant de critères d’évaluation, et d’évaluer leurs impacts sur les trajectoires des hommes et des femmes. Une étude qualitative par entretiens affine notre prospection des modes d’évaluation et permet de comprendre comment des processus de gestion, apparemment neutres, s’avèrent in fine défavorables aux femmes. Ces résultats plaident pour un examen plus fin des pratiques d’évaluation dans le diagnostic des inégalités professionnelles. Ils soutiennent également la stratégie d’égalité négociée défendue depuis peu par les pouvoirs publics : pour plus d’efficacité, les politiques publiques doivent favoriser des formes de régulation plus proches de la réalité des entreprises
Rather than reducing gender inequality with a problem of choice of incentives or pure discrimination, we propose to examine this phenomenon through the issue of labour quality. The assessment of labour quality is not just a simple coordination of actors around a selection criterion; it mobilizes a collective and consensual representation of “skilled” labourer, i.e. a quality convention. A firm is crossed by a plurality of quality conventions. We hypothesize that mobilization of some of them explains horizontal and vertical segregation (glass ceiling) by gender within organisation. An econometric study of the progression of managers and employees in a car manufacturer is proposed. This study helps us to isolate the determinants of career and assess their impact on the career paths of men and women. A qualitative interview study refines our exploration of evaluation methods and helps us to understand how business processes, apparently neutral, proved ultimately detrimental to women. These findings argue for a more practical purpose of evaluation in the diagnosis of occupational inequality. They also support the strategy of mainstreaming advocated recently by the EU and French government: to improve their efficiency, gender politics should promote forms of regulation closer to business reality
4

Jezl, Tomáš. "Využití frameworku NGOSS při zavádění SOA v prostředí telekomunikačního operátora." Master's thesis, Vysoká škola ekonomická v Praze, 2007. http://www.nusl.cz/ntk/nusl-7608.

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Tato diplomová práce se zabývá problematikou servisně orientované architektury a služeb, které tvoří její základní stavební prvky. Jejím cílem je vymezení způsobu, jakým lze navrhovat jednotlivé podnikové aktivity jako služby, které jsou založeny na podobném principu a disponují stejnými charakteristikami jako služby, které jsou navrhovány na technologické úrovni SOA. Práce je rozdělena do pěti částí. Smyslem prvních čtyřech je vytvoření určitého teoretického základu, který je následně využit pro účely prakticky orientovaného příkladu, který se zabývá identifikací služeb. První část je věnována vysvětlení podstaty a významu enterprise architektury. Na ní navazuje další část, která ze zabývá architektonickými frameworky a jejímž smyslem je popsání charakteristik frameworku NGOSS (New Generation Operations Systems and Software), který je určen pro poskytovatele telekomunikačních služeb. Nástroje tohoto frameworku, kterými jsou datový model eTOM (enhanced Telecom Operations Map) a datový model SID (Shared Information/Data Model) jsou využívány v již zmiňované závěrečné části. Předposlední část práce je věnována teoretickému pojednání o servisně orientované architektuře a službách. Kapitola obsahuje popis procesu zavádění servisně orientované architektury a dále uvádí charakteristiky, kterými by měli služby disponovat. Závěr práce je věnován názornému příkladu, jak přistupovat k identifikaci služeb. V rámci závěrečné části je jednak navrhován postup, jak služby identifikovat na základě podnikových procesů a jednak jsou zde demonstrovány a hodnoceny možnosti využití obou zmiňovaných nástrojů frameworku NGOSS v rámci tohoto postupu
5

Bassey, Michael Etim. "Economic viability of a floating gas-to-liquids (GTL) plant / Bassey, Michael Etim." Thesis, North-West University, 2007. http://hdl.handle.net/10394/1577.

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6

Gupta, Roshan 1979. "The design and implementation of FIG : a record/playback mechanism for ETMS feeds." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/87409.

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7

Berthelot, Charlotte. "Les endophytes bruns septés dans les sols pollués aux éléments traces métalliques (ETM) : caractérisation, effet sur les plantes et mécanismes de tolérance aux ETM." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0024/document.

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Le phytomanagement est une méthode de gestion de sites pollués basée sur la capacité des plantes à séquestrer les polluants. L’utilisation de symbiotes fongiques peut représenter un atout afin d’augmenter la production de biomasse. Les endophytes bruns septés (DSE) pourraient stimuler la croissance végétale et augmenter leur protection contre les éléments-traces-métalliques (ETM). Cette thèse se déroule dans le cadre du projet LORVER et vise à comprendre l’interaction « plantes-DSE-sols pollués ». A ces fins, des champignons DSE isolés de racines de peupliers issues de sols pollués par des ETM ont été caractérisés. Ils appartiennent aux genres Leptodontidium, Phialophora, Cadophora et Phialocephala. Trois de ces souches ont ensuite été inoculées à des plantes en présence d’ETM. Dans certains cas, la croissance végétale a été stimulée et une augmentation de la teneur en chlorophylles, en P et en K, ou une réduction de la teneur en Cd dans les parties aériennes ont été mises en évidence. Puis, la souche la plus efficace sur la croissance végétale, Cadophora sp. Fe06, a été utilisée dans un double inoculum avec une souche endomycorhizienne, chez du ray-grass en présence d’ETM. Cette association diminue la teneur en Cd dans les feuilles. Enfin, les mécanismes impliqués dans la tolérance aux ETM chez les DSE ont été examinés via le criblage d’une banque de mutants d’insertions aléatoires, et via l’étude du rôle de la mélanine. Ce travail met en évidence que l’utilisation de DSE, de part leur capacité à coloniser de nombreuses plantes dans différents sols et à stimuler leur croissance, pourrait représenter un atout considérable pour des opérations de phytomanagement
Phytomanagement is a handling method of contaminated sites based on the ability of plants to sequester pollutants. Fungi could favor plant growth in contaminated sites but were far less studied in the context of phytomanagement. Dark septate endophytes (DSE) were reported to improve plant tolerance against metallic trace elements (TE). The present work is part of the LORVER project and aims to understand the “plant-DSE-TE”. DSE were isolated from poplar roots growing on TE-contaminated soils and characterized. They belong to Leptodontidium, Phialophora, Cadophora and Phialocephala genera. Three strains were inoculated to birch and poplar in TE-contaminated soils. Leptodontidium sp. improved plant growth with an increase in chlorophyll, P and K concentrations, whereas Cadophora sp. decreased Cd concentration in shoots of birch. Then, Cadophora sp. Fe06, was used with an endomycorrhizal fungus, to co-inoculate ryegrass in a TE-polluted soil. The co-inoculation leads to the decrease of Cd concentration in shoots. Finally, the mechanisms involved in TE-tolerance by DSE were studied through the screening of a library of Leptondontidium sp. insertional random-mutants and an evaluation of the role of melanin against TE stress. The present work highlights the complexity of the interactions between DSE and plants under TE stress. These interactions were influenced by different parameters including plant species, DSE strains, and soil properties. Nevertheless, the ability of DSE to colonize a broad spectrum of plants in different soils and to promote plant growth, suggest that DSE could represent a substantial benefit for the fungus-assisted phytomanagement of polluted soils
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Silva, Ranério Fernandes da. "Uma abordagem convergente para o mapeamento de processos ITIL similares aos do modelo eTOM." reponame:Repositório Institucional da UnB, 2007. http://repositorio.unb.br/handle/10482/6732.

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Dissertação (mestrado)—Universidade de Brasília, Departamento de Engenharia Elétrica, 2007.
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Este trabalho apresenta uma proposta de racionalização dos processos de gerenciamento de serviços para uma empresa de Telecomunicações, através da utilização dos modelos de referência, eTOM em telecomunicações, e ITIL, em TI, como referência para o gerenciamento dos processos de negócio de uma empresa de telecomunicações e das melhores práticas de gerenciamento de serviços de TI. A abordagem da racionalização dos processos é focalizada no atendimento aos serviços convergentes. Neste trabalho é feita a conceituação da Governança Corporativa e de Governança de TI e suas relações com a lei Sarbanes Oxley e outras regulamentações externas. Estudou-se o framework de melhores práticas para o gerenciamento de serviços de TI, ITIL, e o seu alinhamento com o negócio. É realizada uma conceituação do framework NGOSS (New Generation Operation Support System) e foi realizado um estudo detalhado do Enhanced Telecom Operation Map (eTOM). Aplicou-se também uma atualização e entendimento do cenário atual de telecomunicações e seus relacionamentos com os processos de convergência tecnológica e de serviços. Como ferramenta de apoio para as empresas na adoção de processos para suportar serviços convergentes, foi apresentado o desenvolvimento de proposta de modelo de utilização colaborativa entre os frameworks eTOM e ITIL. Como resultado, tem-se uma avaliação da aplicação de um modelo de utilização colaborativa do eTOM e ITIL, suas oportunidades de aplicação, um entendimento do nível maturidade da convergência dos processos e a mensuração dos ganhos proporcionados pela utilização de um framework convergente. ________________________________________________________________________________ ABSTRACT
This work presents a process optimization proposal for a telecommunications company services management processes, using he reference models eTOM, for telecommunications, and ITIL, for IT, as references, respectively, for the business processes management in a telecommunications company and the best practices in services management of IT. The approach for the process improvement is in the fulfillment of the convergent services. In this work the concepts of Corporative Governance and IT Governance are developed and their relationship with the Sarbanes Oxley law and other regulations are detailed. The IT Service Management best practices framework, ITIL, was analyzed, and its alignment with the business was determined. The conceptualization of the framework NGOSS (New Generation Operation Support System) was carried out through a detailed study of the Enhanced Telecom Operation Map (eTOM). Besides, it was presented an information update of the current telecommunications scene and its relationship with the technological convergence processes and services. As a support tool for the companies adopting convergent support services, the development of a collaboration model involving the frameworks eTOM and ITIL was presented. As a result, one has an application evaluation of the convergent model using eTOM and ITIL, its application opportunities, agreement convergence level maturity processes and the benefits of the use of a convergent framework.
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Tetzlaff, Anke. "Coal fire quantification using ASTER, ETM and BIRD satellite instrument data." Diss., [S.l.] : [s.n.], 2004. http://edoc.ub.uni-muenchen.de/archive/00004398.

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10

Koloskov, Gleb. "Methodology and uncertainty in ET estimate from Landsat-7 ETM+ imagery." Thesis, University of Southampton, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.582652.

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The thesis emphasizes the pivotal role that the Monin-Obukhov length (L) can play within the energy balance method for calculating evapotranspiration (ET) from remotely sensed multi spectral data. It focuses on the possibility of using L as a cornerstone parameter for calculations of sensible heat flux from the pixel data, which can be separated from the other unknowns and can be found by means of any general root finding method. The work goes on to show that all other output parameters can be calculated directly from the value of L that is established, and an analytical expression for the evaporative fraction found. A novel approach is proposed that allows a close approximation of the evaporative fraction to be derived directly without the need for time-consuming iterations within the main calculation step. The energy balance approach for calculating ET from remotely sensed data requires that near-surface air temperature be established from surface temperatures. To do this a linear calibration between surface and near surface temperature is required, which is provided by a calibration procedure by means of selection of a dry and a wet pixel within the image. The work demonstrates the importance of appropriate selection of the dry pixel temperature used for calibration on the ET estimate. It goes on to develop a procedure for refining the selection of the most appropriate hot pixel based on albedo, and water and vegetation indices. The proposed approach bounds the possible error to less than 13%. The work assesses the potential error in the estimate of ET associated with establishing surface temperature from remotely sensed data and looks at the potential value of remotely sensed surface temperature correction models. It shows that error arising from poor determination of surface temperature was less than 3.5% in most cases, although it could reach up to 9% in hot arid environments with small areas of transpiring vegetation.
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Книги з теми "Etmm":

1

Qăt͡hergholov, Azamat. Etem i͡alan: Roman. Ȯfȯ: "Kitap", 1997.

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2

Waldner, Liz. Etym(bi)ology: Poems. Richmond, Calif: Omnidawn, 2002.

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3

Balham, Johansyah. Untaian hijau Bumi Etam. Samarinda]: Biro Hubungan Masyarakat dan Protokol Sekretariat Daerah Provinsi Kalimantan Timur, 2010.

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4

I̐arăḣmădov, M. Azerbaĭdzhanskai︠a︡ poėzii︠a︡ i Etim Ėmin. Baku: Ėlm, 1992.

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5

Ango, Mary. Etum le eyi engla Eggon. [Jos, Nigeria?: s.n., 1997.

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6

Göktegezer, Servet Çagli. Modelistlik kalip elde etme metodlari. Istanbul: Inkilap Kitabevi, 1994.

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7

Pameran Bersama Regional Antar Museum Negeri Provinsi se-Kalimantan (1997 Museum Negeri Propinsi Kalimantan Timur Mulawarman). Tebaran manik-manik di benua Etam. Tenggarong: Museum Negeri Provinsi Kalimantan Timur Mulawarman, 1997.

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8

Hartono, Eko Budi. Jejak sejarah dan purbakala Bumi Etam. Samarinda]: Balai Pelestarian Peninggalan Purbakala Samarinda, Dinas Kebudayaan dan Pariwisata Propinsi Kalimantan Timur, 2010.

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9

Zhumanov, Mamarazhab. Etti ëshda etim qolgan Maḣkamtosh: Biografik ocherk. Toshkent: Muharrir Nashriyoti, 2019.

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10

Pietrzyk, Michael C. Electronic Toll and Traffic Management (ETTM) systems. Washington, D.C: National Academy Press, 1993.

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Частини книг з теми "Etmm":

1

Misra, Kundan. "Telemanagement Forum: eTOM." In Computer Communications and Networks, 117–31. London: Springer London, 2004. http://dx.doi.org/10.1007/978-0-85729-400-5_9.

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2

Stollon, Neal. "ARM ETM." In On-Chip Instrumentation, 213–18. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-7563-8_13.

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3

Berger, V., N. Vodjdani, B. Vinter, D. Delacourt, E. Dupont, E. Costard, D. Papillon, E. Böckenhoff, and J. P. Schnell. "Electron Transfer Infrared Modulator (ETIM)." In NATO ASI Series, 133–40. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3346-7_12.

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4

Sylla, Philipp. "An Evaluation Concept for ETMs." In Schriftenreihe der HHL Leipzig Graduate School of Management, 223–56. Wiesbaden: Springer Fachmedien Wiesbaden, 2023. http://dx.doi.org/10.1007/978-3-658-40403-1_6.

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5

Wagner, Jakob B., and Marco Beleggia. "Gas–Electron Interaction in the ETEM." In Controlled Atmosphere Transmission Electron Microscopy, 63–94. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22988-1_3.

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6

Lent, Bogdan. "Management von Ergebnissen, Terminen, Kosten ETKM." In IT-Projektmanagement als kybernetisches System, 145–80. Wiesbaden: Springer Fachmedien Wiesbaden, 2013. http://dx.doi.org/10.1007/978-3-8348-2512-4_5.

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7

Jooss, Christian, Stephanie Mildner, Marco Beleggia, Daniel Mierwaldt, and Vladimir Roddatis. "ETEM Studies of Electrodes and Electro-catalysts." In Controlled Atmosphere Transmission Electron Microscopy, 301–29. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22988-1_11.

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8

Raouyane, B., M. Bellafkih, M. Errais, D. Leghroudi, D. Ranc, and M. Ramdani. "eTOM Business Processes Conception in NGN Monitoring." In Advanced Research on Computer Education, Simulation and Modeling, 133–43. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21802-6_22.

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9

Kotz, Angelika M. "Anwendung des ETM für die Konsistenzsicherung." In Triggermechanismen in Datenbanksystemen, 132–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74414-3_8.

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10

Pan, Ming, and Cory Czarnik. "Image Detectors for Environmental Transmission Electron Microscopy (ETEM)." In Controlled Atmosphere Transmission Electron Microscopy, 143–64. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22988-1_5.

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Тези доповідей конференцій з теми "Etmm":

1

Kim, Joon-wan, Shinichi Yokota, Masaya Satoh, and Kazuya Edamura. "ECF Micropump-Integrated Micro Hand by MEMS Technology." In ASME/BATH 2014 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fpmc2014-7843.

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On purpose to realize a novel flexible micro-hand for biological and medical applications, this paper presents a major step forward in this direction by directly integrating micropumps into eccentric tube type micro-fingers driven by the ECF (Electro-Conjugate Fluid) jet. ECF is a functional fluid which can generate the strong jet by applying high DC voltage between the electrodes. The ECF eccentric tube type micro-hand (ECF-ETMH) comprises three elastic PDMS micro-fingers with eccentric void and their corresponding MEMS-fabricated ECF micropumps. Because of the geometrical asymmetry created by an eccentric void in a cylindrical elastic body, this micro-finger acts bending motion upon the pressurization of the eccentric void by the ECF jet. Each ECF micropump has 41 pairs of a triangular prism and slit electrodes (TPSEs) that are designed to generate maximum pressures of 300kPa at the applied voltage of 3.5kV. We successfully fabricated eccentric tube type micro-fingers (ETMF) by high aspect ratio micromolding. Although we could not succeed in integrating the ECF micropumps and ETMFs due to the leakage, we experimentally proved the feasibility of this micro-hand system by investigating the characteristics of them separately.
2

Christopherson, Kevin. "The Greater Etom Area (GEA): A New Phase of Exploration in the South Lokichar Basin, Turkana County, Northern Kenya." In SPE/AAPG Africa Energy and Technology Conference. SPE, 2016. http://dx.doi.org/10.2118/afrc-2585029-ms.

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ABSTRACT East Africa is an integral part of the Tullow business. Tullow has been active for over ten years in the onshore rift basins of East Africa, which began with the opening of the Uganda Lake Albert Rift Basin in 2006 following the drilling of Mputa-1. We developed multiple sub-surface evaluation tools and an understanding on how rift success factors can combine during the drilling of the Lake Albert Basin that we then applied to the Tertiary rifts of Kenya. Extensive Full Tensor Gradiometry (FTG), seismic and drilling has taken place over the last five years in Kenya. This has established the South Lokichar basin as a significant oil basin with significant remaining exploration upside. Up until 2015 exploration drilling in the South Lokichar utilized 2D seismic data. The acquisition of 3D seismic in the north and west of the basin has allowed an improved definition of the structural framework and highlighted additional exploration potential. The Etom-2 well spud in November 2015 highlights the value of this 3D seismic in complex structural settings. Etom-1 was planned and drilled on 2D seismic and encountered 10 m of oil pay. Subsequent re-mapping based upon the 3D seismic revealed that the Etom structure was more complicated than originally interpreted and that Etom-1 had drilled into a collapse graben and not tested the structural crest of the field. Etom-2 targeted the up-thrown northern fault block which was not penetrated by the Etom-1 well and encountered 102 m of oil pay. The northern part of the South Lokichar basin is structurally complex and the 3D seismic provided the required detail to highlight that Etom-1 hadn't properly tested the Etom structure. Further mapping of the 3D seismic in the area around Etom-2 has identified multiple follow-up prospects that could be part of a new play domain in the northern part of the South Lokichar Basin. These targets are the focus for Exploration drilling that is due to commence in Q4 2016.
3

Singh, Kuldeep, Medhat Sharabi, Stephen Ambrose, Carol Eastwick, Richard Jefferson-Loveday, Jing Cao, and Adrian Jacobs. "Assessment of an Enhanced Thin Film Model to Capture Wetting and Drying Behavior in an Aero-Engine Bearing Chamber." In ASME Turbo Expo 2019: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/gt2019-91323.

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Abstract In the present work, a wetting and drying model is coupled with Eulerian Thin-Film model (ETFM) to analyze the wetting and drying behavior inside the bearing chamber. In the enhanced model, an additional source term is included to account for the contact angle effect. These models were coupled with volume-of-fluid (VOF) such that the core region is resolved by VOF and region close to the chamber walls, where a thin film is expected is resolved by either ETFM or enhanced ETFM model. Numerical studies are conducted for a shaft speed of 5,000 rpm, lubricant and air flow rates of 100 1/hr and 10 g/s respectively, at a scavenging ratio of 4. In the case of enhanced ETFM model lubricant to surface contact angle was varied from 10° to 45°. The performance of enhanced ETFM model is evaluated to capture drying and wetting behavior on a flat plate and found to be satisfactory. Film thickness prediction of enhanced ETFM model is found to be comparable with the VOF predictions reported in the literature. The effect of contact angle on the spreading of oil and film thickness is found to be small for the investigated conditions on an aero-engine bearing chamber.
4

Nicoli, A., K. Singh, R. Jefferson-Loveday, S. Ambrose, and S. Mouvanal. "Numerical Simulation of Multi-Scale Oil Films on a Rotating Cup Using VOF and Coupled Eulerian Thin-Film-DPM Approaches." In ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/gt2022-82533.

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Abstract In this study, the newly developed Nottingham Gas Turbine and Transmission Research Centre (G2TRC) Bearing Chamber Test Module is presented and investigated computationally. The module houses a rotating cup and shaft configuration in order to simulate the droplet generation processes from an aeroengine bearing. The objective of this paper is to model the thin film that develops over the rotating cup surface, comparing a high-fidelity Volume of Fluid (VOF) approach against the Eulerian Thin-Film Model (ETFM). Whilst a VOF approach has previously demonstrated good accuracy for modelling of films over a rotating surface, the ETFM can provide a comparable solution at a much-reduced computational cost. Simulations are performed over a range of shaft speeds and oil flow rates to represent engine operating conditions. This study presents the very first simulation of an oil film over a rotating cup geometry, with a shaft running through the centre of the cup. Computationally, a VOF periodic sector is compared to ETFM simulations run on an equivalent 30° periodic domain. At planes before the rotating cup edge, both film thicknesses and axial velocities are compared. The high-fidelity VOF simulations demonstrate that with an increase in rotational speed, the film thickness over the rotating cup reduces; whilst an increase in oil flow rate produces a thicker film. Compared to the high-fidelity VOF simulations, the ETFM provides good agreement in terms of both film thickness and axial velocities. Overall, the ETFM is shown to be able to produce a similar film to the VOF approach at a much-reduced computational cost, offering a numerical speed-up of approximately 200 to 300 times.
5

Kakimpa, B., H. P. Morvan, and S. Hibberd. "The Numerical Simulation of Multi-Scale Oil Films Using Coupled VOF and Eulerian Thin-Film Models." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56747.

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This paper presents a coupled ETFM-VOF framework for the numerical simulation of multi-scale thin liquid films. A depth-averaged Eulerian thin-film model (ETFM) is used to simulate the oil flow in very thin-film regions where film thicknesses are below the grid resolution while elsewhere in the domain where grid resolution is sufficient to resolve the film, a traditional Volume-of-Fluid (VOF) approach is retained. The two approaches are coupled through momentum and mass conserving source terms and a transition criterion is introduced where the total liquid volume fraction in each cell is evaluated and either the ETFM or VOF approach used depending on the sufficiency of the local grid resolution. Using this approach, thin-film flows characterised by multiple film thickness scales may be reliably simulated at a relatively lower computational cost. The model builds upon currently available ETFM and VOF approaches to thin-film modelling and represents a novel approach to the numerical simulation of multiphase flows involving a varying range of film thickness scales in space and time. A numerical test case of the 3D rimming flow inside an idealised aero-engine bearing chamber has been used to demonstrate the approach and comparisons made against high resolution VOF solutions.
6

Ma, Rujian, Jungang Wang, and Dong Zhao. "Simulation of Vibration Control of Offshore Platforms Under Earthquake Loadings." In ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/omae2008-57553.

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The simulation of vibration control of offshore platforms under earthquake loadings is performed in this paper by using the ANSYS software, in which the first three order natural frequencies of the platform are controlled by the ETMD system where the parameters of the system are taken in the optimal regions. The results show that the ETMD system can reduce the vibration of the platform effectively under earthquake loadings. Another important conclusion is that reasonable control effects can be obtained by control the first order natural frequency. There are 10% and 20% increase in y and z directions when the first two and three order natural frequencies are controlled simultaneously.
7

"ETCM 2019 Cover Page." In 2019 IEEE Fourth Ecuador Technical Chapters Meeting (ETCM). IEEE, 2019. http://dx.doi.org/10.1109/etcm48019.2019.9014861.

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"ETCM 2018 Cover Page." In 2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM). IEEE, 2018. http://dx.doi.org/10.1109/etcm.2018.8580264.

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"ETCM 2023 Cover Page." In 2023 IEEE Seventh Ecuador Technical Chapters Meeting (ECTM). IEEE, 2023. http://dx.doi.org/10.1109/etcm58927.2023.10308998.

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Aydın, Sena. "Hak Arama Yolu Olarak Siber Toplum Bekçiliği: Rabia Naz Davası Örneği." In COMMUNICATION AND TECHNOLOGY CONGRESS. ISTANBUL AYDIN UNIVERSITY, 2021. http://dx.doi.org/10.17932/ctc.2021/ctc21.039.

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Siber toplum bekçiliği (cyber vigilantism), herhangi bir adli ya da etik vakayla ilgili adalet, güven ya da düzen tesis etme adına sorumluya, faile ya da zanlıya yönelik caydırma, ihbar etme veya cezalandırma amaçlı eylemlerin de dahil olduğu çevrimiçi hareketlerdir. Terimi (cyber vigilantism), eylemin amacı dolayısıyla “ihkak-ı hak” ya da “kanunsuz adalet” çevirileriyle de ifade etmek mümkündür. Linç kültürünü çevrimiçi ortamda tetiklemeye ya da ivmelendirmeye yol açması bir yana, siber toplum bekçiliği aynı zamanda siyasi veya sosyal alanda adaletin sağlandığına dair inancın zedelendiği durumlarda mağduriyetini ispat etmeye çalışan aktörler için son çare olma potansiyeli taşıyabilir. Adalet mekanizmalarının işlevini kaybettiğine dair inancın güçlendiği; toplumsal normların birtakım moral değerleri çiğneyerek belli toplumsal grupların dezavantajına sebep olduğu durumlarda siber toplum bekçileri, kamuoyu vicdanını dürtecek bilgileri çevrimiçi ortamlarda ifşa ederek toplumsal düzeyde bir farkındalık yaratmada, kamu bilinci ve kolektif bir sağduyu oluşturmada işlevsel bir rol üstlenebilir. Bu çalışmanın amacı gazetecilik faaliyetinin kamu yararını gözetmemesi durumunda Türkiye’deki siber toplum bekçiliğinin işlevini anlamaya çalışmaktır. Bu bağlamda, önce intihar ettiği söylenen ancak daha sonra babasının Twitter’daki mücadelesiyle olayın tüm seyrinin değiştiği Rabia Naz’ın davası incelenir. Rabia Naz’ın yaşadığı ilçedeki seçim sonuçlarını dramatik bir şekilde değiştirecek kuvvette bir toplumsal meseleye dönüşen davasının kamuoyu vicdanında yer etme süreci siber toplum bekçiliğinin dört ana tipolojisi üzerinden (işaretleme, sorgulama, avlama, organize sızıntı) ele alınır; siber toplum bekçiliğinin toplumsal adalet ve güven duygusunun tesis edilmesine ilişkin yeri tartışılır.

Звіти організацій з теми "Etmm":

1

Hoffman, Edward, Robert Clay, and Ernest Friedman-Hill. David Etim Quad Chart for SAW Workflow. Office of Scientific and Technical Information (OSTI), July 2019. http://dx.doi.org/10.2172/1762914.

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2

Roebuck, B. ETMT digital calibration for temperature and resistivity. National Physical Laboratory, November 2022. http://dx.doi.org/10.47120/npl.mat110.

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3

Toutin, Th, Y. Carbonneau, and R. Chénier. Block Adjustement of Landsat-7 ETM+ Images. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2001. http://dx.doi.org/10.4095/219817.

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4

Orazietti, J., R. Fraser, C. Butson, R. Latifovic, and W. Chen. Landsat ETM+ classificaiton of Fluxnet Canada flux stations. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2004. http://dx.doi.org/10.4095/220088.

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5

Toutin, Th. DEM from Stereo Landsat 7 ETM+ data over high relief areas. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2002. http://dx.doi.org/10.4095/219767.

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6

Butson, C., R. Fernandes, R. Latifovic, and W. Chen. A Robust Approach for Estimating LAI from Landsat TM/ETM+ Imagery. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2002. http://dx.doi.org/10.4095/219894.

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7

Toutin, Th. Block bundle adjustment of Landsat-7 ETM+ images over mountainous areas. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2003. http://dx.doi.org/10.4095/220054.

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8

Jiménez Hernández, Luis Alexander, and Manuel Antonio Montero Gaona. Etapa de diseño e implementación de prototipo para procesos de enseñanza-aprendizaje de la electrónica digital con dispositivos programables en la especialidad técnica mecatrónica. Escuela Tecnológica Instituto Técnico Central, 2015. http://dx.doi.org/10.55411/2023.40.

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En la especialidad técnica mecatrónica ETM del bachillerato técnico de la Escuela Tecnológica Instituto Técnico Central, se han detectado dificultades para la enseñanza de las tecnologías programables en los cursos de electrónica digital. También se consideran las ventajas de trabajar con tecnologías propias. como se ha evidenciado en trabajos previos con estudiantes de la especialidad. Buscando solución a los problemas señalados, se propone el desarrollo de un prototipo de herramienta tecnológica que facilite el aprendizaje práctico de la electrónica digital en estudiantes de la especialidad técnica mecatrónica del IBTI en la ETITC, que también permita optimizar los tiempos de dedicación de los estudiantes en los temas de los cursos de electrónica. y en función de la flexibilidad y profundidad de los contenidos de los cursos.
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DEFENSE NUCLEAR AGENCY WASHINGTON DC. Superconducting Magnetic Energy Storage (SMES-ETM) System. Environmental Impact Assessment Process Implementation Plan. Fort Belvoir, VA: Defense Technical Information Center, November 1989. http://dx.doi.org/10.21236/ada338872.

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10

Duke, Ian M. East Turkistan Independence Movement (ETIM) Goes for Insurgent Gold at Olympics: A Study of China's Information Warfare. Fort Belvoir, VA: Defense Technical Information Center, July 2008. http://dx.doi.org/10.21236/ada494911.

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