Relevant bibliographies by topics / 74Ge

Academic literature on the topic '74Ge'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic '74Ge.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "74Ge"

1

Song, N., S. Zhang, Z. H. Li, G. X. Li, Z. C. Gao, and H. K. Wang. "Influence of Neutrino–Nuclear Reactions on the Abundance of 74Se." Astrophysical Journal 941, no. 1 (December 1, 2022): 56. http://dx.doi.org/10.3847/1538-4357/aca328.

Full text
Abstract:
Abstract The p-nuclei are supposed to be produced in different astrophysical processes, such as rapid-proton capture, photonuclear reaction, and neutrino-induced reaction. To date, their abundance cannot be reasonably explained. In the present work, the cross sections of the 74Ge (ν e , e −) 74As reaction are calculated with the theoretical and experimental B(GT) values, respectively. The abundance ratios between 74Se and 74Ge produced from the neutrino process (ν-process) are estimated based on the simple hypothesis for core-collapse supernova explosions. The results show that the upper limit of the 74Se and 74Ge abundance ratio resulting from the ν-process is about 36% of the value in the solar system.
APA, Harvard, Vancouver, ISO, and other styles
2

Itoh, Kohei, W. L. Hansen, E. E. Haller, J. W. Farmer, V. I. Ozhogin, A. Rudnev, and A. Tikhomirov. "High purity isotopically enriched 70Ge and 74Ge single crystals: Isotope separation, growth, and properties." Journal of Materials Research 8, no. 6 (June 1993): 1341–47. http://dx.doi.org/10.1557/jmr.1993.1341.

Full text
Abstract:
70Ge and 74Ge isotopes were successfully separated from natural Ge and zone purified. Several highly enriched, high purity 70Ge and 74Ge single crystals were grown by the vertical Bridgman method. The growth system was designed for reliable growth of low dislocation density, high purity Ge single crystals of very small weight (∼4 g). A 70Ge and a 74Ge crystal were selected for complete characterization. In spite of the large surface to volume ratio of these ingots, both 70Ge and 74Ge crystals contain low electrically active chemical net-impurity concentrations of ∼2 × 1012 cm−3, which is two orders of magnitude better than that of 74Ge crystals previously grown by two different groups.1,2 Isotopic enrichment of the 70Ge and the 74Ge crystals is 96.3% and 96.8%, respectively. The residual donors and acceptors present in both crystals were identified as phosphorus and copper, respectively. In addition, less than 1011 cm−3 gallium, aluminum, and indium were found in the 70Ge crystal.
APA, Harvard, Vancouver, ISO, and other styles
3

Yates, S. W., E. E. Peters, B. P. Crider, S. Mukhopadhyay, and A. P. D. Ramirez. "Relevance of the Nuclear Structure of the Stable Ge Isotopes to the Neutrino-less Double-Beta Decay of 76Ge." EPJ Web of Conferences 232 (2020): 04011. http://dx.doi.org/10.1051/epjconf/202023204011.

Full text
Abstract:
Gamma-ray detection following the inelastic neutron scattering reaction on isotopically enriched material was used to study the nuclear structure of 74Ge. From these measurements, low-lying, low-spin excited states were characterized, new states and their decays were identified, level lifetimes were measured with the Doppler-shift attenuation method (DSAM), multipole mixing ratios were established, and transition probabilities were determined. New structural features in 74Ge were identified, and the reanalysis of older 76Ge data led to the placement of the 2+ member of the intruder band. In addition, a number of previously placed states in 74Ge were shown not to exist. A procedure for future work, which will lead to meaningful data for constraining calculations of the neutrinoless double-beta decay matrix element, is suggested.
APA, Harvard, Vancouver, ISO, and other styles
4

Zhu, L. H., M. Cinausero, S. Lunardi, G. Viesti, D. Bazzacco, G. de Angelis, M. De Poli, et al. "Influence of the entrance channel in the fusion reaction 318 MeV 74Ge+74Ge." Nuclear Physics A 635, no. 3 (June 1998): 325–45. http://dx.doi.org/10.1016/s0375-9474(98)00168-7.

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

Ait Ben Mennana, A. "Shape Coexistence in 74Ge, 74Se and 74Kr Investigated by Phenomenological and Microscopic Models." Bulgarian Journal of Physics 48, no. 5-6 (December 18, 2021): 475–84. http://dx.doi.org/10.55318/bgjp.2021.48.5-6.475.

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

Toh, Y., T. Czosnyka, M. Oshima, T. Hayakawa, H. Kusakari, M. Sugawara, Y. Hatsukawa, J. Katakura, N. Shinohara, and M. Matsuda. "Coulomb excitation of 74Ge beam." European Physical Journal A 9, no. 3 (December 2000): 353–56. http://dx.doi.org/10.1007/s100500070019.

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

Vlastou, R., S. Galanopoulos, C. T. Papadopoulos, M. Kokkoris, M. Serris, A. Lagoyannis, and P. Demetriou. "Isomeric Cross Section Study of neutron induced reactions on Ge." HNPS Proceedings 16 (January 1, 2020): 169. http://dx.doi.org/10.12681/hnps.2595.

Full text
Abstract:
The72Ge(n,α)69mZn, 74Ge(n,α)71mZn, 76Ge(n,2n)75g+mGe reaction cross sections have been measured from 9.6 to 11.4 MeV and studied, along with data from litera- ture, within the frame of statistical model calculations by using the code EMPIRE-II.
APA, Harvard, Vancouver, ISO, and other styles
8

Sun, J. J., Z. Shi, X. Q. Li, H. Hua, C. Xu, Q. B. Chen, S. Q. Zhang, et al. "Spectroscopy of 74Ge: From soft to rigid triaxiality." Physics Letters B 734 (June 2014): 308–13. http://dx.doi.org/10.1016/j.physletb.2014.05.069.

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

Silveira, E., W. Dondl, G. Abstreiter, and E. E. Haller. "Raman scattering in annealed isotopic (70Ge) (74Ge) superlattices." Physica E: Low-dimensional Systems and Nanostructures 2, no. 1-4 (July 1998): 291–94. http://dx.doi.org/10.1016/s1386-9477(98)00061-7.

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

Büchner, W., and W. Wolfsberger. "Effekt der Germaniumisotope auf die chemische Verschiebung von 19F in Difluordimethylgerman und von 13C in Tetramethylgerman / Germanium Isotope Effect on the 19F Chemical Shift in Difluorodimethylgerm ane and the 13C Chemical Shift in Tetram ethylgermane." Zeitschrift für Naturforschung B 56, no. 1 (January 1, 2001): 108–10. http://dx.doi.org/10.1515/znb-2001-0119.

Full text
Abstract:
Abstract An isotope effect of about -0.8 Hz at 188 MHz ( - 4 ppb) per two mass units on the 19F chemical shift in Me2GeF2 due to directly bonded 70Ge/ 72Ge/74Ge/76Ge has been observed. The analogous isotope effect on the 13C chemical shift in Me4Ge is about -0.045 Hz at 100.6 MHz (-0.45 ppb).
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "74Ge"

1

Roberts, Amy. "Investigating proton pairing in 76Se with two-proton transfer onto 74Ge." Thesis, University of Notre Dame, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3585264.

Full text
Abstract:

The current experimental effort to detect neutrinoless double beta decay (0νββ) has encouraged significant interest in understanding the nuclei that are candidates for the observation of this process. The goal of this thesis is to contribute to the current body of work on the germanium isotopes near 76Ge, a candidate nucleus currently being used by several large-scale searches for 0νββ. Single-nucleon transfer experiments have been very successful in determining the occupancies of the valence shells in the parent and daughter nuclei 76Ge and 76Se. However, understanding the ground-state pairing of neutrons in 76Ge and protons in 76Se is also crucial because 0νββ converts correlated neutron pairs to correlated proton pairs. Neutron pairing in 76Ge has been found to be concentrated almost exclusively in the ground state, but studies on the tellurium isotopes have indicated that a fully neutron-paired ground state does not constrain the distribution of proton-pairing strength. This work uses the (3He,n) transfer reaction with a 74Ge target to investigate the proton-pairing strength distribution in 76Se. It is found that proton pairs transfer predominantly to the ground state of 76Se. Proton-pair transfer to excited 0+ states in 76Se is determined to be less than 4–8% of the ground-state pair-transfer strength.

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

Sowazi, Khanyisa. "Investigating the Gamma-ray Strength Function in 74Ge using the Ratio Method." University of the Western Cape, 2018. http://hdl.handle.net/11394/6513.

Full text
Abstract:
>Magister Scientiae - MSc
An increasing number of measurements reveal the presence of a low-energy enhancement in the gamma-ray strength function (GSF). The GSF, which is the ability of nuclei to absorb or emit rays, provides insight into the statistical properties of atomic nuclei. For this project the GSF was studied for 74Ge which was populated in the reaction 74Ge(p,p')74Ge* at a beam energy of 18 MeV. The data were collected with the STARS-LIBERACE array at Lawrence Berkeley National Laboratory. Silicon detector telescopes were used for particle identi cation and rays in coincidence were detected with 5 clover-type high-purity germanium detectors. Through the analysis particle- - coincidence events were constructed. These events, together with well-known energy levels, were used to identify primary rays from the quasicontinuum. Primary rays from a broad excitation energy region, which decay to six 2+ states could be identi ed. These states and the associated primary rays are used to measure the GSF for 74Ge with the Ratio Method [1], which entails taking ratios of e ciency-corrected primary -ray intensities from the quasicontinuum. Results from the analysis of the data and focus on the existence of the low-energy enhancement in 74Ge will be discussed. The results are further discussed in the context of other work done on 74Ge using the ( , ') [2], (3He,3He') [3] and ( , ') [4] reactions.
APA, Harvard, Vancouver, ISO, and other styles
3

Essex, Corinda Sebastiana Stuart. "Class teacher attrition : an investigation of self-reported job satisfaction and commitment amongst teachers on St. Helena island." Thesis, University of Bristol, 2000. http://hdl.handle.net/1983/9d4b9539-742e-4735-8371-7919c8ad045a.

Full text
Abstract:
This study investigated levels of job satisfaction and commitment reported by the population of class teachers on St. Helena Island (N = 76), and was set in the context of burgeoning turnover that threatens local educational provision. It explored possible determinants, correlates and implications of these constructs and their interrelationship, drawing comparisons with findings from other cultural environments. The investigation aimed to obtain high quality data that could inform policy decisions designed to reduce attrition, and to test established theories relating to job satisfaction and commitment within a small, developing state setting. A model of possible influences upon the constructs in question and their effect upon career decisions was developed. A three-phase research design was used, involving both qualitative and quantitative approaches to data collection. A purpose-built survey instrument, containing both scale and open-ended items, was constructed and administered. Non-participant observations and interviews were also undertaken. The findings reveal that although most St. Helenian class teachers were moderately satisfied with their jobs and committed to these, all found certain aspects of their role dissatisfying, and a quarter (N = 19) wished to cease teaching. Job satisfaction and commitment were found to possess a weak, positive relationship. Significant differences existed between responses of class teachers within different school sectors, and of those having disparate lengths of teaching experience. These appeared influenced by contextual and personal demographic factors. Similarities between challenges and constraints facing local class teachers and those in both developed, and other developing, states emerged strongly. Emanating from the results, recommendations for changes at strategic and operational levels that may reduce class teacher attrition were formulated, and areas for further research identified. The investigation, thus, sheds light upon the job satisfaction and commitment of St. Helenian class teachers and contributes to international literature pertaining to the theoretical aspects of these constructs
APA, Harvard, Vancouver, ISO, and other styles
4

Milland, Jeffrey. "Paternalists, populists and Pilkington : the struggle for the soul of British television, 1958-1963." Thesis, University of Bristol, 2005. http://hdl.handle.net/1983/eb078f27-74de-42af-a82a-5e5153274cce.

Full text
Abstract:
This thesis examines crucial decisions made about British broadcasting in the five years after 1958, when television first reached five million homes in Britain, and when, it was believed, working-class people had become a majority of the audience. The Pilkington Committee on the Future of Broadcasting was commissioned after some years' uncertainty by a Conservative Government in 1960, allowing it to postpone determining its own policy. The Committee published its Report in 1962, recommending a second television channel for the BBC but not for ITV. The following year, there followed a paternalist and restrictive Television Act. The BBC's dominance in British broadcasting was, as a result, assured for several decades, and commercial television, which had made controversially large profits by exploiting the public taste for undemanding entertainment, was brought under the control of a strengthened Independent Television Authority, emerging from it only in the 1990s. But, at a time when, it was thought, social change meant the end of deference, British television, in which the paternalist tradition was ubiquitous, remained an area where deference was actually enforced. Viewers were expected, much of the time on all available channels, to accept the primacy of the taste of the educated middle-class. Although the Pilkington Committee's recommendation for restructuring ITV was rejected, its Report was nonetheless instrumental in confirming a long-lasting paternalist bias in the system. The thesis analyses the Committee's approach, and argues that its importance should be recognised. Why, it is also asked, did a Conservative Government acquiesce in establishing a pattern of broadcasting contrary to the principles of free enterprise and competition in which it professed to believe? The answer is found in the ambivalence about social change which characterised Conservatism until the Thatcherite victory of the 1980s, and in the puritanical anti-commercialism of the Left.
APA, Harvard, Vancouver, ISO, and other styles
5

Rowland, Matthew James. "Using magnetic resonance imaging to investigate early brain injury after aneurysmal subarachnoid haemorrhage." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:cf5ebac4-745e-4d14-9687-b39c54ee5dfe.

Full text
Abstract:
Aneurysmal subarachnoid haemorrhage (SAH) is a devastating disease frequently leading to death or poor functional outcome and the pathophysiological changes that occur acutely post-rupture remain poorly understood. The work presented here describes a series of studies correlating serial magnetic resonance imaging (MRI) scanning and bedside saccadometry with neurocognitive outcomes to investigate early brain injury after SAH. Further experiments investigate the potential of saccadometry as a bedside biomarker of cerebral ischaemia post-rupture and use MRI in a model of cerebral hypoxia to explore the mechanisms underlying the therapeutic effects of nimodipine. Firstly, results demonstrated significantly increased apparent grey matter volume and restricted diffusion in the first 72 hours post-SAH in patients, suggesting the presence of undiagnosed and significant global cerebral oedema. Furthermore, structural images acquired at this stage enabled us to predict with high accuracy and specificity which patients will develop poor neurocognitive outcomes at three months. Next we investigated the impact of early brain injury on functional connectivity after SAH. Patients showed significantly increased functional connectivity compared to healthy controls in a number of functional networks associated with complex cognitive or emotional functions at all timepoints post-SAH. Neurocognitive impairment was associated with increased and decreases in functional connectivity and all differences were independent from any effect of altered grey matter volume. Improving the prediction of which patients are most at risk of developing secondary ischaemia following SAH remains a key area for research focus. We therefore used a portable beside saccadometer to acquire serial measurements of eye movements acutely post-rupture with results demonstrating faster eye movements are correlated with higher cerebral blood flow in the first 72 hours post-SAH. Finally, we used MRI to quantify the changes in cerebral structure, perfusion and function associated with a healthy volunteer model of acute hypoxia, and the effect of calcium channel blockade with nimodipine on these changes. Results suggest a preferential effect of calcium channel blockade in reversing regional MRI changes under conditions of hypoxia. These changes may help explain the outcome benefit seen in aneurysmal subarachnoid haemorrhage. This thesis highlights the potential of MRI imaging to offer biomarkers of early brain injury in the acute period post-SAH, to improve prediction of patients most at risk of neurocognitive impairment and to offer new insight into the mechanisms behind the therapeutic benefit seen with nimodipine.
APA, Harvard, Vancouver, ISO, and other styles
6

Tadros-Attalla, Helen. "Power spectrum analysis of redshift surveys." Thesis, University of Oxford, 1996. https://ora.ox.ac.uk/objects/uuid:5a5786db-748e-4c78-bab8-c89a4eda2f07.

Full text
Abstract:
This thesis describes a study of the clustering properties of galaxies and clusters of galaxies as measured by the power spectrum (P(k)) and the counts in cells statistic. The samples used are the optical Stromlo-APM galaxy survey, the APM cluster survey and the IRAS 1.2Jy, QDOT and PSCz surveys. Throughout, N-body simulations, for a variety of cosmological models, are used to test methods and to supplement analytic error estimates. For the Stromlo-APM sample the amplitude of the power spectrum is dependent on galaxy morphology. Early-type galaxies show a higher clustering amplitude than late-type galaxies by a factor of ~ 1.8. There is also tentative evidence for some dependence of the clustering amplitude on galaxy luminosity. The parameter Ω0.6/b is estimated via a comparison with the real-space power spectrum of the two-dimensional APM galaxy survey. For APM clusters the power spectrum is measured to very small wave numbers, with a possible detection of the expected turn-over. The results are inconsistent with the standard cold dark matter model. The shape of P( k) for clusters is approximately the same as that for Stromlo-APM galaxies but amplified by a factor of ~ 3.5. The power spectrum of the QDOT sample depends sensitively on the galaxy weighting scheme, probably due the manner in which the region of the Hercules supercluster is sampled. A best estimate of the power spectrum of IRAS galaxies is computed by combining the IRAS l.2Jy and QDOT samples. The PSCz galaxy power spectrum is also computed. The PSCz galaxies have a clustering amplitude twice that of optical galaxies. A similar result is found from a joint counts in cells analysis. Redshift-space distortions in the PSCz sample are analysed using a spherical harmonic decomposition of the density field. The value of Ω0.6/b = 1 is ruled out by this analysis at the 2σ significance level.
APA, Harvard, Vancouver, ISO, and other styles
7

Maguire, David. "Learning to serve time : troubling spaces of working class masculinities in the UK." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:2ad2443b-744e-4cda-83a3-c616a8d6378d.

Full text
Abstract:
This thesis is an exploration of the classed and gendered trajectories that lead to 'revolving door' incarceration for a group of men from working class backgrounds. Considering that men commit most crime and, in the UK, account for over 95% of the prison population, there is relatively little scholarship that explores the links between masculinity and crime and almost a dearth of ethnographic enquiry into the links between the social construction of masculinities and incarceration. In response, this study, employing qualitative in-depth life history interviews with thirty male prisoners housed in an East Yorkshire prison, examines the cyclical interrelations between cultural representations of masculinity, place, schooling, employment, crime and incarceration. Influenced by Connell's theoretical framework, including the relational concept of protest masculinities, and by the Teesside School's work on transitions and alternative careers, the main aim of this research is to examine if, and to what extent, significant cultural and institutional spaces were complicit in the construction and maintenance of versions of protest masculinities. The study reveals that masculinities negotiated over interconnecting sites of deprived neighbourhoods, inadequate children's residential 'care' homes and failing schools better prepared most respondents to serve time in prison than to work in contemporary deindustrialised labour markets. Formative teenage years spent negotiating impoverished prison regimes and living up to extreme prison masculinities contributed to many of the respondents spending more time inside prison than 'on the out'. The thesis concludes with recommendations for policy approaches to better facilitate crucial sites, such as schools and prisons, undoing, rather than reinforcing, troubling gender performances for young boys and men like these respondents. Reducing rising male prison populations, mainly made up of men from deprived neighbourhoods, might be more effectively tackled through innovative, gender informed, policy, ensuring that institutional spaces of learning, 'care', punishment and rehabilitation work harder to open up more positive avenues to doing masculinity.
APA, Harvard, Vancouver, ISO, and other styles
8

Barros, Livia Fernandes. "Determinação de k0 e Q0 para as reações 74Se(n, γ) 75Se, 113In(n, γ) 114mIn, 186W(n, γ) 187W e 191Ir(n, γ) 192Ir." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/85/85131/tde-21092018-143710/.

Full text
Abstract:
Este trabalho teve o intuito de contribuir para a melhoria na qualidade dos valores de k0 e Q0 para as reações 74Se(n, γ) 75Se, 113In(n, γ) 114mIn, 186W(n, γ) 187W e 191Ir(n, γ) 192Ir. As medições das amostras irradiadas no reator IEA-R1 e das fontes padrão da Agência Internacional de Energia Atômica (IAEA) foram realizadas por espectrometria gama de alta resolução em detector de HPGe. A fim de investigar melhor as eficiências nos intervalos de energia onde não havia pontos experimentais, foi aplicado o Método de Monte Carlo. As contribuições originais deste trabalho foram: a análise de covariância associada ao Método dos Mínimos Quadrados, que foi utilizada para o tratamento adequado das incertezas para as reações 74Se(n, γ) 75Se, 113In(n, γ) 114mIn, 186W(n, γ) 187W e 191Ir(n, γ) 192Ir estudadas neste trabalho, onde todas as incertezas parciais envolvidas no processo foram utilizadas; a determinação experimental dos fatores de auto-blindagem para nêutrons térmicos (Gth) e epitérmicos (Ge) utilizados nas determinações de k0 e Q0 para a reação 113In(n, γ) 114mIn e na determinação experimental do fator de auto-blindagem para nêutrons epitérmicos (Ge) utilizado na determinação de k0 e Q0 para a reação 186W(n, γ) 187W, que não foram observadas na literatura, além da determinação de k0 obtida para a reação 186W(n, γ) 187W na energia de 625,51 keV, que também não existe na literatura recomendada. Os valores de k0 e Q0 obtidos para todas as reações foram comparados aos valores encontrados na literatura.
This work had the intention to contribute to the improvement in the quality of the values of k0 and Q0 for the reactions 74Se(n, γ) 75Se, 113In(n, γ) 114mIn, 186W(n, γ) 187W and 191Ir(n, γ) 192Ir. Measurements of the irradiated samples in the IEA-R1 reactor and the standard sources from the International Atomic Energy Agency (IAEA) were performed by high resolution gamma spectrometry with HPGe detector. In order to better investigate the efficiencies in energy intervals where there were no experimental points, the Monte Carlo Method was applied. The original contributions of this work were: the covariance analysis associated to the Least Squares Method, which was used for the adequate treatment of the uncertainties for the reactions 74Se(n, γ) 75Se, 113In(n, γ) 114mIn, 186W(n, γ) 187W and 191Ir(n, γ) 192Ir studied in this work, where all the partial uncertainties involved in the process were used; the experimental determination of the self-shielding factors for thermal (Gth) and epithermal (Ge) neutrons used in the determinations of k0 and Q0 for the 113In(n, γ) 114mIn reaction and the experimental determination of the self-shielding factor for epithermal neutrons (Ge) used in the determinations of k0 and Q0 for the 186W(n, γ) 187W reaction, which were not observed in the literature, as well as the determination of k0 obtained for the 186W(n, γ) 187W reaction in the energy of 625,51 keV, which does not exist in the recommended literature. The values of k0 and Q0 obtained for all reactions were compared to the values found in the literature.
APA, Harvard, Vancouver, ISO, and other styles
9

Bouts, Nicolas. "Synthèse, caractérisation, et propriétés de couches minces nanocomposites nickel/carbone et cuivre/carbone déposées par procédés plasmas." Nantes, 2014. https://archive.bu.univ-nantes.fr/pollux/show/show?id=eb3adf1f-744e-4804-b413-fa80c472e4d1.

Full text
Abstract:
Les couches minces monocomposites carbone/métal, constituées de nanoparticules métalliques dans une matrice de carbone amorphe, présentent des propriétés physico-chimiques spécifiques et modulables selon leur microstructure et composition. La morphologie et la microstructure de ces matériaux sont explorées sur une grande plage de composition chimique en utilisant des techniques de microscopie électronique, EDX, XPS, DRX et spectroscopie Raman. L'influence de la nature du métal sur la microstructure et les propriétés électriques des couches minces nanocomposites métal/carbone a été étudiée pour deux métaux : le nickel et le cuivre. Les couches ont été déposées par deux procédés plasmas différents : l'un combinant la pulvérisation cathodique magnétron de la cible métallique (nickel ou cuivre) et le dépôt chimique en phase vapeur assisté par plasma de méthane et d'argon, et l'autre consistant en la pulvérisation simultanée de la cible métallique et d'une cible de graphite. L'étude des propriétés électriques de ces matériaux met en évidence un phénomène de percolation électrique des grains métalliques. Les propriétés du catalyseur pour la croissance des nanotubes de carbone et de piézorésistivité des couches à base de nickel ont été étudiées. Une nouvelle méthode de synthèse de couches de carbone nanoporeuses, par gravure sélective du cuivre contenu dans les couches nc-Cu/C, a aussi été élaborée
Nanocomposite metal/carbon thin films, consisting of metal rich nanoparticles embedded in an amorphous carbon matrix, present specific and tunable physicochemical properties, depending on the chemical composition of thin films. The morphology and the microstructure of these materials have been explored on a wide range of chemical composition using electronic microscopy, EDX, XPS, XRD, and Raman spectroscopy. The influence of the metal nature on the nanocomposite metal/carbon thin film microstructure and electrical properties was studied for two metals : nickel and copper. The thin films were deposited using two different plasma processes : a first one combining the magnetron sputtering of the metal target (nickel or copper) and the plasma enhanced chemical vapour deposition in an argon/methane gas mixture, and the other one consisting in the cosputtering of metal and graphite targets. The study of the electrical properties highlighted an electrical percolation phenomenon. The catalytic properties for the carbon nanotubes growth and the piezoresistive behavior of nickel based thin films were studies. In addition, an original method based on the selective etching of copper nanoparticles contained in nc-Cu/C thin films was developed, leading to the synthesis of nanoporous carbon electrodes
APA, Harvard, Vancouver, ISO, and other styles
10

Nikolaou, Nikolaos. "Cost-sensitive boosting : a unified approach." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/costsensitive-boosting-a-unified-approach(ae9bb7bd-743e-40b8-b50f-eb59461d9d36).html.

Full text
Abstract:
In this thesis we provide a unifying framework for two decades of work in an area of Machine Learning known as cost-sensitive Boosting algorithms. This area is concerned with the fact that most real-world prediction problems are asymmetric, in the sense that different types of errors incur different costs. Adaptive Boosting (AdaBoost) is one of the most well-studied and utilised algorithms in the field of Machine Learning, with a rich theoretical depth as well as practical uptake across numerous industries. However, its inability to handle asymmetric tasks has been the subject of much criticism. As a result, numerous cost-sensitive modifications of the original algorithm have been proposed. Each of these has its own motivations, and its own claims to superiority. With a thorough analysis of the literature 1997-2016, we find 15 distinct cost-sensitive Boosting variants - discounting minor variations. We critique the literature using {\em four} powerful theoretical frameworks: Bayesian decision theory, the functional gradient descent view, margin theory, and probabilistic modelling. From each framework, we derive a set of properties which must be obeyed by boosting algorithms. We find that only 3 of the published Adaboost variants are consistent with the rules of all the frameworks - and even they require their outputs to be calibrated to achieve this. Experiments on 18 datasets, across 21 degrees of cost asymmetry, all support the hypothesis - showing that once calibrated, the three variants perform equivalently, outperforming all others. Our final recommendation - based on theoretical soundness, simplicity, flexibility and performance - is to use the original Adaboost algorithm albeit with a shifted decision threshold and calibrated probability estimates. The conclusion is that novel cost-sensitive boosting algorithms are unnecessary if proper calibration is applied to the original.
APA, Harvard, Vancouver, ISO, and other styles

Books on the topic "74Ge"

1

Highton, A. J. Solid geology of the Aviemore district: Memoir for 1:50,000 geological sheet 74E (Scotland). London: Stationery Office, 1999.

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

Gilboy, C. F. Basement geology, part of the Cree Lake (South) area: Part of NTS area 74G. [Saskatoon, Sask.]: Saskatchewan Energy and Mines, Saskatchewan Geological Survey, 1985.

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

Ledenvergadering, Vereniging voor Milieurecht (Netherlands). Lokale milieuhinder: Verslag van de 74e ledenvergadering van de Vereniging voor Milieurecht op 22 november 2001. Den Haag: Boom Juridische Uitgevers, 2002.

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

Lee, Jason, and Oklahoma Government. Oklahoma Statues Title 74E Ethics Rules 2019. Independently Published, 2019.

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

Fabian, Hannah. JOYEUX 74e ANNIVERSAIRE: Cadeau Paresseux Pour 74 ANS - un Beau Carnet de Notes. Independently Published, 2021.

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

Delph, Sarah. JOYEUX 74e ANNIVERSAIRE: Cadeau Licorne Pour 74 ANS - un Beau Carnet de Notes. Independently Published, 2021.

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

Douglas, Karlon, and Level Up Designs. Joyeux 74e Anniversaire: Mieux Qu'une Carte d'anniversaire! Livre d'anniversaire de Hérisson Mignon Qui Peut être Utilisé Comme Agenda Ou Cahier. Independently Published, 2019.

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

Anniversaire, Yoml. Livre d'or de Mes 74 Ans: Célébration de 74e Anniversaire Personnalisé - 110 Pages Pour les Invités à Laisser Leurs Commentaires et Souhaits et les Plus Belles Photos - Thème Noir Blanc Or élégant. Independently Published, 2020.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

Editionfr. 74 Ans Ans 828 MOIS et Toujours Formidable. . Carnet: Journal Pour Femme de 74 Ans, Homme/ Joyeux 74e Anniversaire, Idée Cadeau Pour Fille, Fils, Gratitude Journal Pour Encourager une Attitude Positive Au Quotidien, Cahier Ligné . Independently Published, 2022.

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

Book chapters on the topic "74Ge"

1

Nakajima, M., H. Harima, K. Morita, K. M. Itoh, K. Mizoguchi, E. E. Haller, and M. Hangyo. "Observation of coherent confined LO phonons in 70Ge/74Ge isotope superlattices." In Ultrafast Phenomena XII, 384–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-56546-5_112.

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

Xia, Y., J. Butler, M. Janghorbani, P. Ha, P. Whanger, J. Olesik, and L. Daniels. "Effects of Selenium Status on Selenium Incorporation into Plasma Fractions and Excretion in Urine in Men Infused with 74Se Selenite." In Trace Elements in Man and Animals 10, 175–76. New York, NY: Springer US, 2002. http://dx.doi.org/10.1007/0-306-47466-2_45.

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

"§ 74e. Sondervorschrift für Organe und Vertreter." In §§ 69-79b, 459–66. De Gruyter, 2019. http://dx.doi.org/10.1515/9783110491302-021.

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

Barros, Lívia F., Mauro S. Dias, and Marina F. Koskinas. "Determinação de K0 e Q0 Para as Reações 74Se(n,γ) 75Se, 113In(n,γ) 114MIn, 186W(n,γ) 187W E 191Ir(n,γ) 192Ir." In Contribuições do Reator IEA-R1 para a Pesquisa Nuclear: II Workshop Anual do Reator de Pesquisas – WARP 2, 105–16. Editora Blucher, 2022. http://dx.doi.org/10.5151/9786555501483-11.

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

Conference papers on the topic "74Ge"

1

Hofmeyr, C., C. Franklyn, G. Barreau, H. Börner, R. Brissot, H. Faust, and K. Schreckenbach. "74Ge: Transitions and levels excited in thermal-neutron capture." In AIP Conference Proceedings Volume 125. AIP, 1985. http://dx.doi.org/10.1063/1.35120.

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

Nakajima, M., H. Harima, K. Morita, K. M. Itoh, K. Mizoguchi, E. E. Haller, and M. Hangyo. "Observation of coherent confined LO phonons in 70Ge/74Ge isotope superlattices." In International Conference on Ultrafast Phenomena. Washington, D.C.: OSA, 2000. http://dx.doi.org/10.1364/up.2000.mf52.

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

Fülöp, Zs, Á Z. Kiss, E. Somorjai, C. E. Rolfs, H. P. Trautvetter, T. Rauscher, and H. Oberhummer. "The reaction 70Ge(α,γ)74Se (p-process)." In The 3rd international symposium on nuclear astrophysics: Nuclei in the Cosmos III. AIP, 1995. http://dx.doi.org/10.1063/1.47419.

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

Rukhadze, N. I., A. S. Barabash, V. B. Brudanin, A. A. Klimenko, S. I. Konovalov, A. V. Rakhimov, E. N. Rukhadze, et al. "Investigation of β+EC, EC/EC processes in 74Se." In WORKSHOP ON CALCULATION OF DOUBLE-BETA-DECAY MATRIX ELEMENTS (MEDEX’19). AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5130982.

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

Reports on the topic "74Ge"

1

Friske, P. W. B., M. W. McCurdy, S. J. Day, H. Gross, R G Balma, J. J. Lynch, and C C Durham. National geochemical reconnaissance lake sediment and water data, northeastern Alberta (parts of NTS 74E, 74L, and 74M). Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1994. http://dx.doi.org/10.4095/194141.

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

Regional lake sediment and water geochemical data, Saskatchewan [NTS 74A (NW), 74B (N1/2), 74G (S1/2), 74H (SW)]. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1986. http://dx.doi.org/10.4095/130264.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic '74Ge' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography