Bibliografias temáticas / ICR studies

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Literatura científica selecionada sobre o tema "ICR studies"

Autor: Grafiati
Publicado: 4 de junho de 2021
Última modificação: 10 de fevereiro de 2022

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Artigos de revistas sobre o assunto "ICR studies"

1

Allgeier, Steven C., Hiba M. Shukairy e James J. Westrick. "ICR treatment studies". Journal - American Water Works Association 90, n.º 11 (novembro de 1998): 70–82. http://dx.doi.org/10.1002/j.1551-8833.1998.tb08535.x.

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MARUYAMA, Shigeo, Tetsuya YOSHIDA e Masamichi KOHNO. "FT-ICR Studies of Laser Desorbed Carbon Clusters." Transactions of the Japan Society of Mechanical Engineers Series B 65, n.º 639 (1999): 3791–98. http://dx.doi.org/10.1299/kikaib.65.3791.

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KHAN, SALMAN N., e PANOS S. SHIAKOLAS. "TO STUDY THE EFFECTS OF INTRASTROMAL CORNEAL RING GEOMETRY AND SURGICAL CONDITIONS ON THE POSTSURGICAL OUTCOMES THROUGH FINITE ELEMENT ANALYSIS". Journal of Mechanics in Medicine and Biology 16, n.º 07 (novembro de 2016): 1650101. http://dx.doi.org/10.1142/s0219519416501013.

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Intrastromal corneal ring (ICR) is a transparent circular implant inserted in the cornea to provide structural support in an attempt to alleviate preexisting refractive errors. This is a surgical procedure whose success depends on control parameters such as, ICR geometry which includes ICR thickness and diameter, and surgical conditions which includes ICR implantation depth and diameter of corneal pocket. This research utilizes finite element (FE) analysis techniques to develop a high fidelity and computationally efficient three-dimensional axisymmetric cornea model to study the relative effects of ICR implant geometry and surgical conditions on the postsurgical shape of the cornea utilizing corneal apical displacement results. The FE analysis results indicate that ICR implantation reduces myopia, and the amount of myopic rectification is dependent on the control parameters which include ICR geometry and surgical conditions. The results show that an increase in ICR thickness leads to an increase in myopic rectification, whereas an increase in ICR radius leads to a decrease in myopic rectification. ICR implantation depth analysis results suggest that corneal depth of 40–75% provides steady myopic rectification. Corneal pocket diameter analysis revealed that smaller corneal pockets lead to increase in myopic rectification. Overall, the FE model results are in qualitative agreement with published clinical studies. Finally, the combined impact of the control parameters on myopic rectification was studied by conducting a sensitivity analysis and an equation relating myopic rectification with control parameters was developed utilizing simple linear regression analysis.
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Smalley, R. E. "Ft-Icr Studies With Laser-Generated Supersonic Cluster Beams". Instrumentation Science & Technology 17, n.º 1-2 (janeiro de 1988): 1–21. http://dx.doi.org/10.1080/10739148808543664.

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Myla, Subbarao, e Sepideh Kazemi. "Interventional Perspectives on Carotid Stenting – Examining the Trial Data". Interventional Cardiology Review 6, n.º 1 (2011): 76. http://dx.doi.org/10.15420/icr.2011.6.1.76.

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Over the past two decades, carotid stenting has been one of the most extensively studied endovascular innovations for stroke prevention. The technique has evolved from a carotid balloon angioplasty, to treating a few hard-to-reach carotid lesions in the thorax or upper cervical and intracranial areas, to treating hostile necks not suitable for carotid endarterectomy. Eventually, refined carotid stenting with distal and more recently, proximal embolic protection rose to the challenge and is now competing for a legitimate position against carotid endarterectomy in the mainstream routine revascularisation of low-risk patients. As we track the evolution of carotid stenting from individual case studies through registries to randomised studies we gain insights into technique, pharmacological therapy, indications and unique complications.
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O’Connor, Cliodhna, e Helene Joffe. "Intercoder Reliability in Qualitative Research: Debates and Practical Guidelines". International Journal of Qualitative Methods 19 (1 de janeiro de 2020): 160940691989922. http://dx.doi.org/10.1177/1609406919899220.

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Evaluating the intercoder reliability (ICR) of a coding frame is frequently recommended as good practice in qualitative analysis. ICR is a somewhat controversial topic in the qualitative research community, with some arguing that it is an inappropriate or unnecessary step within the goals of qualitative analysis. Yet ICR assessment can yield numerous benefits for qualitative studies, which include improving the systematicity, communicability, and transparency of the coding process; promoting reflexivity and dialogue within research teams; and helping convince diverse audiences of the trustworthiness of the analysis. Few guidelines exist to help researchers negotiate the assessment of ICR in qualitative analysis. The current article explains what ICR is, reviews common arguments for and against its incorporation in qualitative analysis and offers guidance on the practical elements of performing an ICR assessment.
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Qualman, Stephen J., Cheryl M. Coffin, William A. Newton, Hiroshi Hojo, Timothy J. Triche, David M. Parham e William M. Crist. "Intergroup Rhabdomyosarcoma Study: Update for Pathologists". Pediatric and Developmental Pathology 1, n.º 6 (novembro de 1998): 550–61. http://dx.doi.org/10.1007/s100249900076.

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Rhabdomyosarcoma (RMS) is the most common soft tissue sarcoma of childhood, and 75% of such cases in the United States are reviewed at the Pathology Center for the Intergroup Rhabdomyosarcoma Study Group (IRSG). The first four generations of IRSG therapeutic trials (IRS I–IV) and supportive pathologic studies have generated a new International Classification of Rhabdomyosarcoma (ICR) that offers new morphologic concepts to the practicing pathologist. The objective of this report is to clearly define emerging histopathologic categories of RMS as defined by the ICR, and to emphasize correlative immunohistochemical or molecular studies. Emerging ICR variants of RMS place the patient in widely divergent prognostic categories (superior, botryoid or spindle cell variants; poor, solid alveolar or diffusely anaplastic variants). The cardinal histopathologic features of the ICR combined with results of studies of fusion genes seen with t(1;13) and t(2;13) will help delineate therapeutic subgroups of RMS for the fifth generation (IRS V) of IRSG studies. Consequently, it is imperative for the practicing pathologist to be familiar with the practical workup and diagnosis of RMS in childhood.
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Burns, Philip A., Jane H. Kinnaird, Brian J. Kilbey e John R. S. Fincham. "SEQUENCING STUDIES OF ICR-170 MUTAGENIC SPECIFICITY IN THE am (NADP-SPECIFIC GLUTAMATE DEHYDROGENASE) GENE OF NEUROSPORA CRASSA". Genetics 113, n.º 1 (1 de maio de 1986): 45–51. http://dx.doi.org/10.1093/genetics/113.1.45.

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ABSTRACT The acridine half-mustard ICR-170-induced reversion of the mutant am15, which has a single base-pair deletion, at a frequency of between 9 and 28 × 10-6. In each of three classes of revertants, the mutagen had induced the insertion of a (see PDF) base pair at a (see PDF) site. The mutant am6, which has a single base pair insertion, is known to be revertible, with UV light, by deletion of a (see PDF) base pair at a (see PDF) site. This mutant reverted with ICR-170 at a frequency of 0.1 × 10-6. These results show that ICR-170 is able to induce addition frameshifts in Neurospora crassa within short, monotonous runs of G:C base pairs, but indicate a lack of deletion activity at such sequences.
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Hampsey, D. M., R. A. Koski e F. Sherman. "Highly mutable sites for ICR-170-induced frameshift mutations are associated with potential DNA hairpin structures: studies with SUP4 and other Saccharomyces cerevisiae genes." Molecular and Cellular Biology 6, n.º 12 (dezembro de 1986): 4425–32. http://dx.doi.org/10.1128/mcb.6.12.4425.

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The majority of the mutations induced by ICR-170 in both the CYC1 gene (J. F. Ernst et al. Genetics 111:233-241, 1985) and the HIS4 gene (L. Mathison and M. R. Culbertson, Mol. Cell. Biol. 5:2247-2256, 1985) of the yeast Saccharomyces cerevisiae were recently shown to be single G . C base-pair insertions at monotonous runs of two or more G . C base pairs. However, not all sites were equally mutable; in both the CYC1 and HIS4 genes there is a single highly mutable site where a G . C base pair is preferentially inserted at a [sequence in text]. Here we report the ICR-170 mutagen specificity at the SUP4-o tyrosine tRNA gene of yeast. Genetic fine structure analysis and representative DNA sequence determination of ICR-170-induced mutations revealed that there is also a single highly mutable site in SUP4-o and that the mutation is a G . C base-pair insertion at a monotonous run of G . C base pairs. Analysis of DNA sequences encompassing the regions of highly mutable sites for all three genes indicated that the mutable sites are at the bases of potential hairpin structures; this type of structure could not be found at any of the other, less mutable G . C runs in SUP4, CYC1, and HIS4. Based on these results and recent information regarding novel DNA structural conformations, we present a mechanism for ICR-170-induced mutagenesis. (i) ICR-170 preferentially binds to DNA in the beta conformation; factors that increase the temporal stability of this structure, such as adjacent stem-and-loop formation, increase the frequency of ICR-170 binding; (ii) the observed mutagen specificity reflects formation of a preferred ICR-170 intercalative geometry at [sequence in text] sites; (iii) during replication or repair, ICR-170 remains associated with the single-stranded template; (iv) stuttering or strand slippage by the polymerization complex as it encounters the mutagen results in nucleotide duplication; (v) subsequent replication or mismatch repair fixes the insertion into the genome. This mechanism accounts for both the IRC-170 mutagenic specificity and the molecular basis of the highly mutable sites in S. cerevisiae.
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Hampsey, D. M., R. A. Koski e F. Sherman. "Highly mutable sites for ICR-170-induced frameshift mutations are associated with potential DNA hairpin structures: studies with SUP4 and other Saccharomyces cerevisiae genes". Molecular and Cellular Biology 6, n.º 12 (dezembro de 1986): 4425–32. http://dx.doi.org/10.1128/mcb.6.12.4425-4432.1986.

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The majority of the mutations induced by ICR-170 in both the CYC1 gene (J. F. Ernst et al. Genetics 111:233-241, 1985) and the HIS4 gene (L. Mathison and M. R. Culbertson, Mol. Cell. Biol. 5:2247-2256, 1985) of the yeast Saccharomyces cerevisiae were recently shown to be single G . C base-pair insertions at monotonous runs of two or more G . C base pairs. However, not all sites were equally mutable; in both the CYC1 and HIS4 genes there is a single highly mutable site where a G . C base pair is preferentially inserted at a [sequence in text]. Here we report the ICR-170 mutagen specificity at the SUP4-o tyrosine tRNA gene of yeast. Genetic fine structure analysis and representative DNA sequence determination of ICR-170-induced mutations revealed that there is also a single highly mutable site in SUP4-o and that the mutation is a G . C base-pair insertion at a monotonous run of G . C base pairs. Analysis of DNA sequences encompassing the regions of highly mutable sites for all three genes indicated that the mutable sites are at the bases of potential hairpin structures; this type of structure could not be found at any of the other, less mutable G . C runs in SUP4, CYC1, and HIS4. Based on these results and recent information regarding novel DNA structural conformations, we present a mechanism for ICR-170-induced mutagenesis. (i) ICR-170 preferentially binds to DNA in the beta conformation; factors that increase the temporal stability of this structure, such as adjacent stem-and-loop formation, increase the frequency of ICR-170 binding; (ii) the observed mutagen specificity reflects formation of a preferred ICR-170 intercalative geometry at [sequence in text] sites; (iii) during replication or repair, ICR-170 remains associated with the single-stranded template; (iv) stuttering or strand slippage by the polymerization complex as it encounters the mutagen results in nucleotide duplication; (v) subsequent replication or mismatch repair fixes the insertion into the genome. This mechanism accounts for both the IRC-170 mutagenic specificity and the molecular basis of the highly mutable sites in S. cerevisiae.
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Teses / dissertações sobre o assunto "ICR studies"

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Fox, Brigitte S. "FT-ICR studies of solvated ions". [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=964184176.

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Balteanu, Iulia. "FT-ICR studies of transition metal cluster ions". [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974430919.

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3

Campbell, Sherrie A. Beauchamp Jesse L. "FT-ICR studies of the structures, energetics and reaction dynamics of biological molecules in the gas phase /". Diss., Pasadena, Calif. : California Institute of Technology, 1995. http://resolver.caltech.edu/CaltechETD:etd-05122005-160230.

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Balaj, Ovidiu-Petru. "The chemistry of solvated ions studied by FT-ICR mass spectrometry". [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=974431192.

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Drinkwater, Mark Roland. "Radar altimetric studies of polar ice". Thesis, University of Cambridge, 1987. https://www.repository.cam.ac.uk/handle/1810/268053.

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Active microwave sensors are known to provide valuable information regarding snow and ice surfaces in the polar regions, where darkness and cloud cover prevail. Here, data collected in the Arctic by a Ku-band microwave radar altimeter, designed and constructed in the UK, are analysed. The two main components of this study comprise data gathered in the East Greenland Sea marginal ice zone and over two Svalbard ice caps. A systematic treatment is made of the electromagnetic properties of snow and ice at 13.81 GHz, and the differences between various polar surface media are highlighted. Theoretical and empirical models are presented which enable calculation of the relevant dielectric and scattering properties of snow and ice layers. Parametric studies are undertaken to give insight into the range of scattering conditions likely to be encountered by a radar altimeter in the regions investigated. Examples of altimetric data and results of their analysis are presented, demonstrating the effects of different ice types and terrain upon incident altimeter pulses. Waveforms are characterised by their shape, and certain forms are linked with particular physical properties of the surface. To this a variety of supporting information is added in order to verify and validate interpretations of these results. Algorithms are proposed which enable geophysical information to be derived from altimetric data.
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Holtom, Philip Derek. "Irradiation studies of astrophysical ice analogues". Thesis, University College London (University of London), 2005. http://discovery.ucl.ac.uk/1444790/.

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In this thesis the formation of molecular species in cold icy mantles, typical of those in the interstellar medium (ISM) has been studied. The construction of an ultra high vacuum system for the formation and containment of these astrophysical ice analogues is described. The method of preparation of these ices is detailed and analysis methodologies are discussed. VUV spectra of molecular ices (e.g. SO2, CH3NH2, OCS) measured on the UV1 beam line of the Astrid Synchrotron facility at the University of Aarhus in Denmark, are presented. Molecular synthesis (e.g. CO3, CO, H2CO3) induced by ion irradiated CO2/H 2O ices using facilities at Queens University Belfast are also reported. In particular this thesis focuses on the irradiation studies of the binary ice mixture of Methylamine (CH3NH2) and Carbon Dioxide (CO2). The results of irradiation of CH3NH2 and CO2 binary ice mixtures by ultraviolet photons, and electrons are presented. The apparent production of the amino acid - glycine - in our irradiated samples is discussed together with possible production processes.
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Davies, Edward. "Neutron diffraction studies of amorphous ice and amorphous ice co-deposits". Thesis, University of Kent, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305366.

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Liu, Kit-ying, e 廖潔凝. "ICT supported collaborative learning of business studies". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2004. http://hub.hku.hk/bib/B29959895.

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Rowley, Linda Kathleen. "Fundamental studies of interferences in ICP-MS". Thesis, University of Plymouth, 2000. http://hdl.handle.net/10026.1/1918.

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Methods of temperature measurement by mass spectrometry have been critically reviewed. It was concluded that the most appropriate method depended critically on the availability of fundamental data, hence a database of fundamental spectroscopic constants, for diatomic ions which cause interferences in ICP-MS, was compiled. The equilibration temperature, calculated using the different methods and using various diatomic ions as the thermometric probes, was between c.a. 400 - 10,000 K in the central channel, and between c.a. 600 - 16,000 K when the plasma was moved 1.8 mm off-centre. The wide range in temperature reflected the range of temperature measurement methods and uncertainty in the fundamental data. Optical studies using a fibre optic connected to a monochromator were performed in order to investigate the presence of interferences both in the plasma and the interface region of the ICP-MS, and the influence of a shielded torch on these interferences. It was possible to determine the presence of some species in the plasma, such as the strongly bound metal oxides, however, no species other than OH were detected in the interface region of the ICP-MS. The OH rotational temperature within the interface region of the ICP-MS was calculated to be between 2,000 - 4,000 K. The effect of sampling depth, operating power, radial position and solvent loading, with and without the shielded torch, on the dissociation temperature of a variety of polyatomic interferences was investigated. These calculated temperatures were then used to elucidate the site of formation for different polyatomic interferences. Results confirmed that strongly bound ions such as MO+ were formed in the plasma, whereas weakly bound ions such as ArO+ were formed in the interface region due to gross deviation of the calculated temperatures from those expected for a system in thermal equilibrium.
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Puletti, F. "Laboratory spectroscopic studies of interstellar ice analogues". Thesis, University College London (University of London), 2014. http://discovery.ucl.ac.uk/1430173/.

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In recent years, the molecular chemistry in interstellar environments has proven to be far more complex than was initially expected. We live in a molecular universe that is rich with molecules formed both in the gas phase and on the surface of interstellar icy dust grains. Two important classes of interstellar molecules are sulphur-bearing species and complex organic molecules, i.e., molecules containing carbon and containing more than 6 atoms. The former are relevant because of their potential utility in establishing the age of star forming regions. The latter are important because they are excellent probes of the physical conditions of the regions where they reside. Moreover, complex organic molecules are thought to be astrobiologically relevant. To properly understand the chemical networks leading to the formation of astrochemical species, to date more than 170 have been conclusively identified, the integration of laboratory experimental data with existing computational models is paramount. Laboratory studies can be conducted in the gas phase or, as is the case for this work, in the solid state. Studies of the processing of ices, by thermal energy or by ultraviolet radiation, are particularly important in understanding solid phase chemistry in the interstellar medium. In this thesis, the results of laboratory experiments aiming to mimic the physical/chemical reactions of ices on interstellar dust grains are presented. Specifically, temperature programmed desorption and reflection absorption infrared studies were carried out in an ultra high vacuum setup on H2S (chapter 3) and on the C2H4O2 isomer family (chapters 4 and 5) formed of acetic acid (CH3COOH), glycolaldehyde (HOCH2CHO) and methyl formate (HCOOCH3). Ultraviolet irradiation studies of glycolaldehyde have also been performed, and the results of these are presented in chapter 6. In order to put the laboratory results into an astrophysical context, computer simulations of the desorption of these species from interstellar grains were conducted. The results for H2S are presented in chapter 3. Those for acetic acid, glycolaldehyde and methyl formate are presented in chapter 4.
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Livros sobre o assunto "ICR studies"

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Jung-Rothenhäusler, Friedrich. Fernerkundungs- und GIS-Studien in Nordostgrönland =: Remote sensing and GIS studies in north-east Greenland. Bremerhaven: Alfred-Wegener-Institut für Polar- und Meeresforschung, 1998.

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2

Delmas, Robert J., ed. Ice Core Studies of Global Biogeochemical Cycles. Berlin, Heidelberg: Springer Berlin Heidelberg, 1995. http://dx.doi.org/10.1007/978-3-642-51172-1.

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Wenn ich "ich" sage: Studien zur fundamentaltheologischen Relevanz selbstbewusster Subjektivität. Frankfurt am Main: P. Lang, 1994.

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4

Streit, Hanspeter. Ich, der Millionenbetrüger "Dr. Alder". Bern: Zytglogge, 1994.

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5

Arntz, Wolf E., e Andrew Clarke, eds. Ecological Studies in the Antarctic Sea Ice Zone. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-59419-9.

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Honneth, Axel. Das Ich im Wir: Studien zur Anerkennungstheorie. Berlin: Suhrkamp, 2010.

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7

Guthke, Karl Siegfried. Die Entdeckung des Ich: Studien zur Literatur. Tübingen: A. Francke, 1993.

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8

Williams, Denis. Breaking the ice: Essays about understanding. London: Gronow Press, 1991.

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9

Gronau, Dietrich. Ich bin Stadtstreicherin: Über das Leben obdachloser Frauen. Frankfurt am Main: Fischer Taschenbuch Verlag, 1994.

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10

McCormick, Michael E. Studies of sediment transport by Beaufort Gyre pack ice, 1992: Sediment, ice, & water data. [Menlo Park, CA]: U.S. Dept. of the Interior, U.S. Geological Survey, 1993.

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Capítulos de livros sobre o assunto "ICR studies"

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Ghosh, Anarta, e Nicolai Petkov. "Incomplete Contour Representations and Shape Descriptors: ICR Test Studies". In Brain, Vision, and Artificial Intelligence, 416–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11565123_40.

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Balcerzak, Maria. "Mass Spectrometric Detectors for Environmental Studies". In Application of IC-MS and IC-ICP-MS in Environmental Research, 47–78. Hoboken, NJ, USA: John Wiley & Sons, Inc, 2016. http://dx.doi.org/10.1002/9781119085362.ch2.

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3

Oerlemans, J. "Ice and Climate Studies". In Climate and Geo-Sciences, 303–7. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2446-8_15.

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Randoll, Dirk. "Konzeption der Studie". In „Ich bin Waldorflehrer“, 13–14. Wiesbaden: Springer Fachmedien Wiesbaden, 2013. http://dx.doi.org/10.1007/978-3-531-19811-8_2.

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Haapala, Jari J., Iina Ronkainen, Natalija Schmelzer e Marzenna Sztobryn. "Recent Change—Sea Ice". In Regional Climate Studies, 145–53. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16006-1_8.

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Krieghoff-Henning, Eva, e Andrea Gaisser. "Klinische Studien: Soll ich, kann ich teilnehmen?" In Patientenzentrierte Information in der onkologischen Versorgung, 83–91. Berlin, Heidelberg: Springer Berlin Heidelberg, 2020. http://dx.doi.org/10.1007/978-3-662-60461-8_9.

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Van Ypersele, J. P. "Modelling Sea Ice for Climate Studies". In Climate-Ocean Interaction, 97–123. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-2093-4_6.

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Boeser, Christian. "Empirische Studie". In „Bei Sozialkunde denke ich nur an dieses Trockene …“, 121–243. Wiesbaden: VS Verlag für Sozialwissenschaften, 2002. http://dx.doi.org/10.1007/978-3-663-09186-8_3.

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Pflaum, Stephan. "Wie studiere ich karriereorientiert?" In Der Karriere-Kompass für Studierende, 39–80. Wiesbaden: Springer Fachmedien Wiesbaden, 2020. http://dx.doi.org/10.1007/978-3-658-28847-1_3.

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Shimizu, Hiromu. "Glaciological Studies in West Antarctica, 1960-19621". In Antarctic Snow and Ice Studies, 37–64. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/ar002p0037.

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Trabalhos de conferências sobre o assunto "ICR studies"

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Rodgers, Colin, Aubrey Stone e David White. "A Gas Turbine Cycle Selection Issue: Recuperated or ICR". In ASME Turbo Expo 2007: Power for Land, Sea, and Air. ASMEDC, 2007. http://dx.doi.org/10.1115/gt2007-27910.

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The intercooled recuperative gas turbine (ICR) potentially offers the advantages of higher specific power, and improved thermal efficiency compared to the recuperative gas turbine, such advantages are however contingent upon the additional parasitic encumbrances of the intercooler heat dissipation or recovery apparatus and pressure losses, plus flowpath ducting and complexity. The thermodynamic performances, relative sizing and relative costs of both an ICR and recuperative gas turbine engine, with a thermal efficiency goal approaching 40%, combined with low exhaust emission requirements were studied. The study encompassed primary candidate engine flowpath configurations comprising of single shaft, two shaft, and two spool designs, with both recuperation (R), and combined Intercooling and Recuperation (ICR). In conducting the study all engine flowpaths were sized for 300kW with a maximum turbine inlet temperature of 1837F (1000C), representative of conservative life limits for conventional un-cooled superalloy turbine rotors. Heat exchanger effectivenesses of the intercooler and recuperator were selected at 80 and 85%, as a compromise between cost, weight, and thermal efficiency considerations. The study confirmed that the simple recuperated cycle is capable of comparable peak thermal efficiency levels to the ICR provided that ICR intercooling parasitic losses are duly accounted, and furthermore has intrinsically lower manufacturing and development costs than the ICR. The cycle performance code used for the studies included prediction of engine exhaust emissions, part load characteristics, and compressor operating lines. The emissions assessment slightly favored the ICR as a consequence of its higher specific power. Assuming part load operation at variable speed and constant turbine exhaust temperature, the two spool ICR showed slightly better part load fuel economy than a recuperated engine.
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de Oliveira Costa, Daniel, Joel Sena Sales Junior e Antonio Carlos Fernandes. "Instantaneous Center of Rotation of a Vessel Submitted to Oblique Waves". In ASME 2020 39th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/omae2020-18860.

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Abstract When under influence of an incident wave system, any freely floating body presents a general motion with all six degrees of freedom. The Instantaneous Center of Rotation, as defined in classical mechanics, is a concept that allows the description of a general motion in 6 degrees of freedom as a pure rotation around such point. This approach, although not widely used in ocean engineering, might be an alternative tool that allows fast and precise analysis in many cases. Recent studies have shown that under specific conditions, such as a heading wave condition, the ICR varies in time but it is always located along a line for one wave frequency. Similar results were presented regarding beam waves as well. The present work continues with the investigation regarding the behavior of ICR under more generic conditions, assuming oblique waves exciting a vessel with typical geometry of a FPSO platform. The study extends the knowledge derived based on 2D approaches from previous works, comparing the results obtained from the different methods. An analytical model is presented, assuming only harmonic motion to all 6 degrees of freedom and showing that, similar to what was observed in the simplified 2D cases, the ICR tends to present dependence on the frequency of motion. Numerical data acquired from commercial codes based on potential theory is also presented.
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Jin, Lixue, Wenjun Xu, Zhihao Liu, Junwei Yan, Zude Zhou e Duc Truong Pham. "Knowledge Sharing and Evolution of Industrial Cloud Robotics". In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6538.

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Industrial Cloud Robotics (ICR), with the characteristics of resource sharing, lower cost and convenient access, etc., can realize the knowledge interaction and coordination among cloud Robotics (CR) through the knowledge sharing mechanism. However, the current researches mainly focus on the knowledge sharing of service-oriented robots and the knowledge updating of a single robot. The interaction and collaboration among robots in a cloud environment still have challenges, such as the improper updating of knowledge, the inconvenience of online data processing and the inflexibility of sharing mechanism. In addition, the industrial robot (IR) also lacks a well-developed knowledge management framework in order to facilitate the knowledge evolution of industrial robots. In this paper, a knowledge evolution mechanism of ICR based on the approach of knowledge acquisition - interactive sharing - iterative updating is established, and a novel architecture of ICR knowledge sharing is also developed. Moreover, the semantic knowledge in the robot system can encapsulate knowledge of manufacturing tasks, robot model and scheme decision into the cloud manufacturing process. As new manufacturing tasks arrived, the robot platform downloads task-oriented knowledge models from the cloud service platform, and then selects the optimal service composition and updates the cloud knowledge by simulation iterations. Finally, the feasibility and effectiveness of the proposed architecture and approaches are demonstrated through the case studies.
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Gad-Briggs, Arnold, e Pericles Pilidis. "Analyses of the Off-Design Point Performance of a High Pressure Ratio Intercooled Brayton Helium Gas Turbine Cycle for Generation IV Nuclear Power Plants". In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-67715.

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The Intercooled Cycle (IC) is considered as a viable alternative to the Simple Cycle Recuperated (SCR) and the Intercooled Cycle Recuperated (ICR), based on recent studies in a Nuclear Power Plant (NPP) configuration, which showed plant efficiencies of above 45%. The main difference in configuration is it does not utilise a recuperator. For part load performance, it is expected that the components of the IC will not operate at optimum conditions as the characteristics change. Thus the ability to demonstrate viable part load performance becomes an important requirement for the IC. The main objective of this study is to derive Off-Design Points (ODPs) from a known Design Point (DP) for a temperature range of −35 to 50°C and COTs between 750 to 1000°C. The ODPs have been calculated using a modelling & performance simulation tool designed specifically for this study and aim to provide a set of points that give operational equilibrium, which is critical to the economics of the plant. Results show that the intercooler alters the actual mass flow rate and compressor pressure ratio but the delta across an analysed range of 1 to 5% pressure loss shows a change of ∼9% in plant cycle efficiency, in comparison to the ICR (6%). Furthermore, the reactor pressure losses for IC has the lowest effect on plant cycle efficiency in comparison to the SCR and ICR. Characteristic trend maps have also been produced for the intercooler operation and the reactor and are applicable for NPP first order calculations. To that effect, it is also proposed to consider the intercooler pressure loss as a handle for ODP performance calculations. The analyses intend to bring further attention to the IC an alternative to current cycle configurations and to aid the development of cycles for Generation IV Nuclear Power Plants specifically Gas Cooled Fast Reactors (GFRs) and Very High Temperature Reactors (VHTRs), where helium is the coolant.
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Gad-Briggs, Arnold, Pericles Pilidis e Theoklis Nikolaidis. "A Review of Brayton Helium Gas Turbine Cycles for GFR and VHTR Generation IV Nuclear Power Plants". In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-81681.

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Studies are currently on-going on the cycle performance of Generation IV (Gen IV) Nuclear Power Plants (NPPs) for the purpose of determining optimum operating conditions for efficiency and economic reasons. For Gas-cooled Fast Reactors (GFRs) and Very-High Temperature Reactors (VHTRs), the cycle layout is predominantly driven by the choice of components, the component configuration and the coolant. The purpose of this paper to present and review the cycles currently being considered — the Simple Cycle Recuperated (SCR) and the Intercooled Cycle Recuperated (ICR). In all cases, the cycles utilise helium as the coolant in a closed Brayton gas turbine configuration. Comparisons between the cycles are made for Design Point (DP) and Off-Design Point (ODP) analyses to emphasise the benefits and drawbacks of each cycle. The paper also talks about future trends which include higher Core Outlet Temperatures in excess of 1000 degrees Celsius and the proposal of a simplified cycle configuration which eliminates the need for the recuperator.
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Lehrman, Ira S., e Patrick L. Colestock. "ICRF edge modeling studies". In Radio−frequency power in plasmas. AIP, 1989. http://dx.doi.org/10.1063/1.38506.

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Chai, Rukuan, Yuetian Liu, Yuting He, Qianjun Liu e Wenhuan Gu. "Experimental Study on Direct Current Voltage Assisted Carbonated Water-Flooding Mechanism in Tight Oil Reservoir". In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21498-ms.

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Abstract Tight oil reservoir plays an increasingly important role in the world energy system, but its recovery is always so low. Hence, a more effective enhanced oil recovery (EOR) technology is urgently needed. Meanwhile, greenhouse effect is more and more serious, a more effective carbon capture and sequestration (CCS) method is also badly needed. Direct current voltage assisted carbonated water-flooding is a new technology that combines direct current voltage with carbonated water-flooding to enhance oil recovery and CO2 sequestration efficiency, simultaneously. Experimental studies were conducted from macroscopic-scale to microscopic-scale to study the performance and mechanism of direct current voltage assisted carbonated water-flooding. Firstly, core flood experiments were implemented to study the effect of direct current voltage assisted carbonated water on oil recovery and CO2 sequestration efficiency. Secondly, contact angle and interfacial tension/dilatational rheology were measured to analyze the effect of direct current voltage assisted carbonated water on crude oil-water-rock interaction. Thirdly, total organic carbon (TOC), gas chromatography (GC), and electrospray ionization-fourier transform ion cyclotron resonance-mass spectrometry (ESI FT ICR-MS) were used to investigate the organic composition change of produced effluents and crude oil in direct current voltage assisted carbonated water treatment. Through direct current voltage assisted carbonated water-flooding experiments, the following results can be obtained. Firstly, direct current voltage assisted carbonated waterflooding showed greater EOR capacity and CO2 sequestration efficiency than individual carbonated water and direct current voltage treatment. With the increase of direct current voltage, oil recovery increases to 38.67% at 1.6V/cm which much higher than 29.07% of carbonated water-flooding and then decreases, meanwhile, CO2 output decreases to only 35.5% at 1.6V/cm which much lower than 45.6% of carbonated water-flooding and then increases. Secondly, in direct current voltage assisted carbonated water-flooding, the wettability alteration is mainly caused by carbonated water and the effect of direct current can be neglected. While both carbonated water and direct current have evident influence on interfacial properties. Herein, with direct current voltage increasing, the interfacial tension firstly decreases and then increases, the interfacial viscoelasticity initially strengthens and then weakens. Thirdly, GC results indicated that crude oil cracking into lighter components occurs during direct current voltage assisted carbonated water-flooding, with the short-chain organic components increasing and the long-chain components decreasing. Meanwhile, TOC and ESI FT ICR-MS results illustrated that CO2 electroreduction do occur in direct current voltage assisted carbonated water-flooding with the dissolved organic molecules increases and the emergence of formic acid. Conclusively, the synergy of CO2 electrochemical reduction into formic acid in aqueous solution and the long-chain molecules electrostimulation pyrolysis into short ones in crude oil mutually resulted in the enhancement of crude oil-carbonated water interaction. This paper proposed a new EOR & CCS technology-direct current voltage assisted carbonated water-flooding. It showed great research and application potential on tight oil development and greenhouse gas control. More work needs to be done to further explore its mechanism. This paper constructs a multiscale & interdisciplinary research system to study the multidisciplinary (EOR&CCS) problem. Specifically, a series connected physical (Core displacement, Contact angle, and Interfacial tension/rheology measurements) and chemistry (TOC, GS, and ESI FT ICR-MS) experiments are combined to explore its regularity and several physics (Atomic physics) and chemistry (Electrochemistry/Inorganic Chemistry) theories are applied to explain its mechanisms.
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Chow, C., A. Bers e V. Fuchs. "Analytic studies of ICRF heating". In Radio−frequency power in plasmas. AIP, 1989. http://dx.doi.org/10.1063/1.38491.

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Collings, Mark P., Rui Chen e Martin R. S. McCoustra. "Probing the Morphology of Interstellar Ice Analogues". In ASTROCHEMISTRY: From Laboratory Studies to Astronomical Observations. AIP, 2006. http://dx.doi.org/10.1063/1.2359540.

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van Dishoeck, E. F., K. Acharyya, A. Al-Halabi, S. Andersson, S. E. Bisschop, F. A. van Broekhuizen, H. J. Fraser et al. "Spectroscopy and Processing of Interstellar Ice Analogs". In ASTROCHEMISTRY: From Laboratory Studies to Astronomical Observations. AIP, 2006. http://dx.doi.org/10.1063/1.2359546.

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Relatórios de organizações sobre o assunto "ICR studies"

1

Shuchman, R. A., R. G. Onstott e C. C. Wackerman. Arctic Ice Studies. Fort Belvoir, VA: Defense Technical Information Center, fevereiro de 1993. http://dx.doi.org/10.21236/ada268608.

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Meier, W. R. ICF special studies: Final report. Office of Scientific and Technical Information (OSTI), setembro de 1987. http://dx.doi.org/10.2172/5735328.

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Martin, Seelye. Laboratory Studies of Polar Ice Processes. Fort Belvoir, VA: Defense Technical Information Center, setembro de 1997. http://dx.doi.org/10.21236/ada627647.

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Mellor, George L. Modeling Studies of Ice-Ocean Dynamics and Thermodynamics. Fort Belvoir, VA: Defense Technical Information Center, março de 1993. http://dx.doi.org/10.21236/ada264084.

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Zdanowicz, C. Ice-core based studies of climate and atmospheric changes. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2012. http://dx.doi.org/10.4095/290196.

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THAYER SCHOOL OF ENGINEERING HANOVER NH. In-Situ Synchrotron X-Ray Topographic Studies Of Polycrystalline Ice. Fort Belvoir, VA: Defense Technical Information Center, janeiro de 1994. http://dx.doi.org/10.21236/ada291877.

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Hawthorne, J. Irradiation-anneal-reirradiation (IAR) studies of prototypic reactor vessel weldments. Office of Scientific and Technical Information (OSTI), novembro de 1989. http://dx.doi.org/10.2172/5273667.

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Veneziani, Carmela. Report Viewgraphs for IC project: Regional ocean and land ice ensemble studies to better quantify uncertainties in Antarctic-driven sea level rise. Office of Scientific and Technical Information (OSTI), março de 2019. http://dx.doi.org/10.2172/1503179.

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Thomas, Douglas, e Mellon Michael. Sublimation of terrestrial permafrost and the implications for ice-loss processes on Mars. Engineer Research and Development Center (U.S.), julho de 2021. http://dx.doi.org/10.21079/11681/41244.

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Sublimation of ice is rate-controlled by vapor transport away from its outer surface and may have generated landforms on Mars. In ice-cemented ground (permafrost), the lag of soil particles remaining after ice loss decreases subsequent sublimation. Varying soil-ice ratios lead to differential lag development. Here we report 52 years of sublimation measurements from a permafrost tunnel near Fairbanks, Alaska, and constrain models of sublimation, diffusion through porous soil, and lag formation. We derive the first long-term in situ effective diffusion coefficient of ice-free loess, a Mars analog soil, of 9.05 × 10⁻⁶ m² s⁻¹, ~5× larger than past theoretical studies. Exposed ice-wedge sublimation proceeds ~4× faster than predicted from analogy to heat loss by buoyant convection, a theory frequently employed in Mars studies. Our results can be used to map near-surface ice-content differences, identify surface processes controlling landform formation and morphology, and identify target landing sites for human exploration of Mars.
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Benson, Carl S. Stratigraphic Studies in the Snow and Firn of the Greenland Ice Sheet. Fort Belvoir, VA: Defense Technical Information Center, agosto de 1996. http://dx.doi.org/10.21236/ada337542.

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