Letteratura scientifica selezionata sul tema "In-Medium effects"

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Articoli di riviste sul tema "In-Medium effects"

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Karakoc, M., e C. Bertulani. "Medium effects in direct reactions". Journal of Physics: Conference Series 420 (25 marzo 2013): 012074. http://dx.doi.org/10.1088/1742-6596/420/1/012074.

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Bhattacharyya, Abhijit, Sanjay K. Ghosh, S. C. Phatak e Sibaji Raha. "In-medium effects on theφmeson". Physical Review C 55, n. 3 (1 marzo 1997): 1463–66. http://dx.doi.org/10.1103/physrevc.55.1463.

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Dytman, S. A., e F. Tabakin. "Medium effects in photopion reactions". Physical Review C 33, n. 5 (1 maggio 1986): 1699–706. http://dx.doi.org/10.1103/physrevc.33.1699.

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Aaviksaar, A. "Medium effects in enzyme specificity". Journal of Molecular Catalysis 47, n. 2-3 (settembre 1988): 265–70. http://dx.doi.org/10.1016/0304-5102(88)85050-8.

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Cugnon, J., e M. C. Lemaire. "Medium effects in pion production". Nuclear Physics A 489, n. 4 (dicembre 1988): 781–802. http://dx.doi.org/10.1016/0375-9474(88)90121-2.

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Sarropoulou, V., K. Dimassi-Theriou e I. Therios. "Medium strength in inorganics and PVP concentration effects on cherry rootstocks in vitro rooting". Horticultural Science 42, No. 4 (2 giugno 2016): 185–92. http://dx.doi.org/10.17221/359/2014-hortsci.

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Rapp, Ralf. "Electromagnetic radiation and in-medium effects". Acta Physica Hungarica A) Heavy Ion Physics 27, n. 1 (marzo 2006): 15–24. http://dx.doi.org/10.1007/bf03177667.

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Lewis, C., T. Kramer, S. Robinson e D. Hilvert. "Medium effects in antibody-catalyzed reactions". Science 253, n. 5023 (30 agosto 1991): 1019–22. http://dx.doi.org/10.1126/science.1887215.

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Crespo, R., e F. D. Santos. "Medium effects in deuteron elastic scattering". Journal of Physics G: Nuclear and Particle Physics 15, n. 5 (1 maggio 1989): 637–42. http://dx.doi.org/10.1088/0954-3899/15/5/016.

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Athar, M. Sajjad, I. Ruiz Simo, H. Haider e M. J. Vicente Vacas. "Nuclear medium effects in structure functions". Journal of Physics: Conference Series 374 (19 luglio 2012): 012020. http://dx.doi.org/10.1088/1742-6596/374/1/012020.

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Tesi sul tema "In-Medium effects"

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Rust, Felix. "In-medium effects in the holographic quark-gluon plasma". Diss., lmu, 2009. http://nbn-resolving.de/urn:nbn:de:bvb:19-104729.

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Wilkinson, David P. "Proton donor and medium effects in electrochemical proton discharge". Thesis, University of Ottawa (Canada), 1986. http://hdl.handle.net/10393/21311.

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Romanel, Celso 1952. "DYNAMIC SOIL-STRUCTURE INTERACTION IN A LAYERED MEDIUM". Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/276511.

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The most popular method in dynamic soil-structure interaction analysis is the finite element method. The versatility in problems involving different materials and complex geometries is its main advantage, yet FEM can not simulate unbounded domains completely. A hybrid method is proposed in this research, which models the near field (structure and surrounding soil) by finite elements and the far field by a continuum approach. The system is excited by monochromatic body waves (P and SV) propagating with oblique incidence and harmonic time dependence. The far field problem is solved using Thomson-Haskell formulation associated with the delta matrix technique. The soil profile does not contain any soft layer and the layers are assumed to be linearly elastic, isotropic, homogeneous and perfectly bonded at the interfaces. Two-dimensional (in-plane) formulation is considered and the analysis is performed on both k- and o-planes through time and spatial Fourier transforms of the field equations and boundary conditions. (Abstract shortened with permission of author.)
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Bolin, Jennifer A. "Comparative analysis of selected radiation effects in Medium Earth Orbits". Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1997. http://handle.dtic.mil/100.2/ADA341085.

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Thesis (M.S. in Astronautical Engineering) Naval Postgraduate School, December 1997.
"December 1997." Thesis advisor(s): Vicente Garcia, Brij Agrawal. Includes bibliographical references (p. 95-99). Also available online.
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Campo, Rubens Jose. "Residual effects of aluminium on Bradyrhizobium japonicum in defined medium and soil solutions". Thesis, University of Reading, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283634.

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Castillo, Martín Miriam. "Vitrification of in vitro produced porcine blastocysts: the effects of culture medium and antioxidants". Doctoral thesis, Universitat de Girona, 2014. http://hdl.handle.net/10803/276875.

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In the present Thesis, we observed that vitrifying-warming porcine embryos had detrimental effects. Indeed, vitrification and warming were seen to reduce developmental ability and quality of in vitro produced porcine blastocysts, with increased levels of DNA fragmentation, raised levels of reactive oxygen species and alterations in the expression of pluripotency and thermal shock-related genes. This suggested that establishing effective cryopreservation methods was required. Following this, we found that embryo cryotolerance did not only depend on the cryopreservation procedures but also on the composition of the culture medium. On the other hand, beneficial effects were also obtained from exposing embryos to antioxidants. Specifically, L-ascorbic acid addition during culture and/or vitrification and warming enhanced embryo survival, redox status and thermal stress response
En aquesta tesi s’ha observat que els processos de vitrificació i escalfament sotmeten els embrions porcins produïts in vitro a situacions d’estrès. Els resultats obtinguts quant a la capacitat dels embrions a l’hora de sobreviure a la criopreservació i a la qualitat dels embrions vitrificats, amb augments en els nivells de fragmentació del DNA i en les espècies reactives d’oxigen i amb alteracions en el perfil d’expressió de gens involucrats en la pluripotencialitat i en la resposta al xoc tèrmic, suggereixen la necessitat d’incrementar l’efectivitat dels mètodes de criopreservació. S’ha determinat, a més, que la criotolerància embrionària no només depèn dels processos de criopreservació sinó també de la composició dels medis de cultiu. Finalment, s’ha observat que l’exposició dels embrions a molècules antioxidants desencadena efectes beneficiosos. Concretament, l’addició d’àcid ascòrbic en els medis de cultiu i vitrificació-escalfament millora la supervivència, l’estat d’oxidació/reducció i la resposta a l’estrès tèrmic
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Alexopoulos, Aris. "An investigation of the effects of 2-body interactions in an effective medium theory". Monash University, Dept. of Physics, 2004. http://arrow.monash.edu.au/hdl/1959.1/9717.

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Youd, Stephen John. "The effects of crosslinking in the fracture properties of high and medium density polyethylene". Thesis, Manchester Metropolitan University, 1991. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306251.

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Alvarez, Martinez José Manuel. "Foam-flow behavior in porous media : effects of flow regime and porous-medium heterogeneity /". Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

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Oh, Kyunghui. "Use of Reading Strategy to Assess Reading Medium Effectiveness: Application to Determine the Effects of Reading Medium and Generation in an Active Reading Task". Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/51227.

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Abstract (sommario):
Advances in computer technology have hastened the development and dissemination of a wide range of electronic media into the workplace and educational settings. Electronic media offer many advantages, including quicker access to information and easier information sharing among professions. However, electronic reading media have still not been well integrated into these settings, especially for non-routine cognitive tasks like active reading. Conflicting results from different measures (e.g., performance, preference) have been reported regarding their efficacy. Despite the fact that there are no significant performance differences between reading from paper and reading from electronic media, people still show a preference for reading from paper and resist changes in the workplace, which often results in the abandonment of electronic reading media. Therefore, in order to maximize the potential benefits from electronic reading media, researchers and designers need more valid ways to assess the effectiveness of electronic reading media than relying on existing methods using outcome-based measures of reading.
Although the act of reading is primarily a cognitive process, there are relatively few comprehensive empirical reports on how the use of different reading media impacts cognitive processes like reading strategies. Moreover, researchers have rarely considered generational differences, even though generation-specific reading practices could significantly affect readers\' current reading practices using different media.
Therefore, the overall objective of this research was to develop and evaluate a new method to test the effectiveness of reading medium in terms of supporting design and evaluation. Specifically, this research examined how reading strategies can be used as a process measure. The research consisted of three parts: (1) investigating readers\' use of reading strategies using different types of media, (2) identifying the relationship between readers\' use of reading strategies and their performance and subjective response, and (3) identifying the relationship between readers\' use of reading strategies and cognitive load. Resultant findings are expected to improve how we measure the effectiveness of electronic reading media.
First, readers\' use of reading strategies for different types of media was examined and associated generational differences were investigated. A laboratory experiment was conducted in which three generations of participants (Baby Boomers, Generation X, and Generation Y) were asked to perform an active reading task (a simulated work-related reading task) with three types of media (paper, computer, and iPad). Readers\' uses of reading strategies were identified from task observation and Retrospective Think Aloud (RTA) sessions. Quantitative analyses revealed significant differences in readers\' use of reading strategies, and which depended on both the type of media and individual attributes (generation). Detailed qualitative analyses were conducted to help explain the underlying reasons for these differences in the use of reading strategies.
Second, based on the identified reading strategies, the relationships between readers\' use of reading strategies and their performance and subjective responses were examined. Such outcome measures have traditionally been used to assess the efficacy of different reading media. However, previous studies have generated conflicting results and did not clearly demonstrate the underlying aspects that influence readers\' performance and subjective responses. The results of this study showed a clear association between readers\' use of reading strategies and their performance and subjective responses. Accordingly, it was revealed that participants who used the reading strategies they developed in their formative period exhibited higher subjective responses.
Third, again based on the identified reading strategies, the association between readers\' use of reading strategies and cognitive load was examined. Reading from electronic media has been regarded as requiring more cognitive resources than reading from paper. However, it has not been well understood precisely which aspects of reading from different media actually influence cognitive load in terms of cognitive and metacognitive perspectives. The results reported herein showed an association between reading strategies and cognitive load. Therefore, this study revealed that the use of reading strategies was critical to their cognitive load.
Overall, this research demonstrated how reading strategies could be used as process measures to assess the effectiveness of specific media for active reading activities. The way in which people interact with a text (readers\' use of reading strategies) was affected by the medium, as well as by generation-specific reading practices. The extent to which reading strategies can explain reading differences was confirmed, by investigating the associations between readers\' use of reading strategies and other measures. These findings can contribute to the design of reading media and help to determine the most suitable reading media for active reading activities (e.g., work-related reading activities). In addition, the findings also support the importance of culturally situated experience for non-routine cognitive activities and the use of an integrated approach that takes into account both cognitive and cultural aspects in designing human-computer interaction for non-routine cognitive activities.
Ph. D.
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Libri sul tema "In-Medium effects"

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Bolin, Jennifer A. Comparative analysis of selected radiation effects in Medium Earth Orbits. Monterey, Calif: Naval Postgraduate School, 1997.

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Arriola, Enrique Ruiz. Form Factors, Medium Effects and Vector Mesons in the Projected Chiral Soliton Model. Darmstadt: Zentralbibliothek Forschungszentrum Julich, 1990.

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Vernez, Moudon Anne, Washington (State). Dept. of Transportation., University of Washington. Dept. of Urban Design and Planning., Washington State Transportation Center e Washington State Transportation Commission, a cura di. Effects of site design on pedestrian travel in mixed-use, medium-density environments. [Olympia]: Washington State Dept. of Transportation, 1997.

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Food and Agriculture Organization of the United Nations., a cura di. Analysis of the medium-term effects of Hurricane Mitch on food security in Central America. Rome: Food and Agriculture Organization of the United Nations, 2001.

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Gambling, Trevor. Effects of the medium of communication on the comprehension and retention of messages in corporate reports. Portsmouth: Portsmouth Polytechnic, Business School, 1986.

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Duflo, Esther. The medium run effects of educational expansion: Evidence from a large school construction program in Indonesia. Cambridge, MA: National Bureau of Economic Research, 2002.

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Duflo, Esther. The medium run effects of education expansion: Evidence from a large school construction program in Indonesia. Cambridge, MA: Massachusetts Institute of Technology, Dept. of Economics, 2001.

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D, McGregor, Rice Jerry M e Venitt S, a cura di. The use of short- and medium-term tests for carcinogens and data on genetic effects in carcinogenic hazard evaluation. Lyon, France: International Agency for Research on Cancer, 1999.

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Hermans, Michel. Small- and medium-sized enterprises' restructuring in a context of transition: A shared process : inter-player effects on efficient boundary choice in the Argentine manufacturing sector. Buenos Aires: ECLAC Office in Buenos Aires, 2003.

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Ivar, Enge, e Edgren Johan, a cura di. Patient safety and adverse events in contrast medium examinations: Proceedings of the Nycomed Scientific Symposium 1988, held in Oslo, 18-19 October 1988. Amsterdam: Excerpta Medica, 1989.

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Capitoli di libri sul tema "In-Medium effects"

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Bianchi, N. "Nuclear Medium Effects in Hadron Leptoproduction". In Nuclear Dynamics: From Quarks to Nuclei, 99–104. Vienna: Springer Vienna, 2003. http://dx.doi.org/10.1007/978-3-7091-6014-5_10.

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Kenney, Jeffrey D. P. "The Effects of Environment on the Cool Phase of the Interstellar Medium in Galaxies". In The Interstellar Medium in Galaxies, 151–80. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0595-5_6.

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Chang, Ni-Bin, Marty Wanielista, Mikhal Moberg, Fahim Hossain e Ammarin Daranpob. "Use of Functionalized Filter Medium for Nutrient Removal in Stormwater Ponds". In Effects of Urbanization on Groundwater, 199–223. Reston, VA: American Society of Civil Engineers, 2010. http://dx.doi.org/10.1061/9780784410783.ch08.

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Agarwal, G. S., e R. R. Puri. "Quantum Effects in Light Propagation through a Nonlinear Medium". In Coherence and Quantum Optics VI, 15–16. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4613-0847-8_4.

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Mandai, Batakrishna, e M. Nafi Toksoz. "Effects of an explosive source in an anisotropic medium". In Explosion Source Phenomenology, 261–68. Washington, D. C.: American Geophysical Union, 1991. http://dx.doi.org/10.1029/gm065p0261.

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Krewald, S., e K. Nakayama. "Relativistic and medium effects in the effective nucleon-nucleon interaction". In Medium Energy Nucleon and Antinucleon Scattering, 449–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/3-540-16054-x_186.

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Costa, D., J. Guignard e H. Pezerat. "Production of free radicals by non-fibrous materials in a cell-free buffer medium". In Effects of Mineral Dusts on Cells, 189–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74203-3_25.

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Jin, Cheng. "Medium Propagation Effects in High-Order Harmonic Generation of Ar". In Springer Theses, 45–61. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-01625-2_3.

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Fournier, J., J. B. Nwa Nangwa, J. Guignard e H. Pezerat. "Adsorption Properties for PAH of Asbestos and Iron Oxides, in Relation with Their Activity in Biological Medium". In In Vitro Effects of Mineral Dusts, 477–82. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70630-1_61.

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Bonneau, L., R. Zalma, J. Guignard, H. Pezerat, D. Mansuy e M. Fonecave. "Surface Active Sites and Catalytic Properties of Asbestos Mineral. Possible Consequence for their Activity in Biological Medium". In In Vitro Effects of Mineral Dusts, 25–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-642-70630-1_3.

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Atti di convegni sul tema "In-Medium effects"

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Detmold, William, e Huey-Wen Lin. "Medium effects in parton distributions". In XXIX International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2012. http://dx.doi.org/10.22323/1.139.0149.

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Schliemann, Trond, Trude Asting, Asbjørn Følstad e Jan Heim. "Medium preference and medium effects in person-person communication". In CHI '02 extended abstracts. New York, New York, USA: ACM Press, 2002. http://dx.doi.org/10.1145/506443.506559.

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BIANCHI, N. "NUCLEAR MEDIUM EFFECTS IN HADRON LEPTOPRODUCTION". In Proceedings of the International Symposium. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812777218_0032.

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Weilnau, Carsten, Cornelia Denz, Marcus Ahles, Kristian Motzek, Andreas Stepken e Friedemann Kaiser. "Spatial (2+l)D higher-order vector solitons in a photorefractive medium". In Photorefractive Effects, Materials, and Devices. Washington, D.C.: OSA, 2001. http://dx.doi.org/10.1364/pemd.2001.455.

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"Medium effects in proton-induced strangeness production". In XITH CONFERENCE ON QUARK CONFINEMENT AND HADRON SPECTRUM. AIP Publishing LLC, 2016. http://dx.doi.org/10.1063/1.4938696.

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Jedrzejowska-Tyczkowska, H., A. Pieta, T. Danek e A. Lesniak. "Offset Dependant Anisotropy Effects in Orthorhombic Medium". In 72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609.201401099.

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Holzmann, Romain. "The experimental quest for in-medium effects". In Sixth International Conference on Quarks and Nuclear Physics. Trieste, Italy: Sissa Medialab, 2012. http://dx.doi.org/10.22323/1.157.0005.

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Sagemerten, Nina, Denis Träger, Johannes Jägers, Jörg Imbrock, Cornelia Denz, Anton S. Desyatnikov, Dragomir N. Neshev, Yuri S. Kivshar, Wieslaw Krolikowski e Alexander Dreischuh. "Nonlinear photonic lattices induced by periodic phase modulation in a photorefractive nonlocal self-focusing medium". In Photorefractive Effects, Materials, and Devices. Washington, D.C.: OSA, 2005. http://dx.doi.org/10.1364/pemd.2005.517.

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Klimov, Aleksander, Efim Oks, Aleksey Zenin e Ilya Bakeev. "Electron-Beam Sintering of Metalloceramic Materials in Medium Vacuum". In 2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE). IEEE, 2020. http://dx.doi.org/10.1109/efre47760.2020.9241931.

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Giannuzzi, Floriana. "In-medium effects on chiral condensate through holography". In QCD@WORK 2012: International Workshop on Quantum Chromodynamics: Theory and Experiment. AIP, 2012. http://dx.doi.org/10.1063/1.4763536.

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Rapporti di organizzazioni sul tema "In-Medium effects"

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Domínguez-Díaz, Rubén, Samuel Hurtado e Carolina Menéndez. The medium-term effects of investment stimulus. Madrid: Banco de España, gennaio 2024. http://dx.doi.org/10.53479/35913.

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This paper presents an endogenous growth general equilibrium model (EGGEM) of firm dynamics and innovative investment for the Spanish economy that allows the medium-term effects of economic policies and shocks to be better understood. The model is calibrated using both aggregate and firm-level data. It is then used to assess the medium-term macroeconomic consequences of the different components of the Next Generation EU (NGEU) programme, including public investment, private capital transfers and innovative investment transfers. According to our baseline simulation, the NGEU funds significantly foster economic activity by raising aggregate productivity, private investment and employment. As a result, annual GDP growth is increased by 0.17 percentage points on average over the period of NGEU disbursement. Among the different policy instruments considered, we find that innovation transfers have the largest impact on aggregate output, only matched by increases in the stock of public capital if it is highly efficient.
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Kim, Cheonkoo, Jungsoo Park, Donghyun Park e Shu Tian. Heterogeneous Effect of Uncertainty on Corporate Investment: Evidence from Listed Firms in the Republic of Korea. Asian Development Bank, febbraio 2022. http://dx.doi.org/10.22617/wps220044-2.

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It finds that financial uncertainty has a significant negative effect on corporate investment and the effects are mixed across firms of different sizes. Small firms and large firms are more exposed to the negative uncertainty effects than medium-sized firms. Financial constraints and investment irreversibility amplify the negative effects of uncertainty. Small and medium-sized firms are more financially constrained and large firms’ investments are more irreversible in nature. The authors suggest that policies target the development of capital markets and bond markets for small and medium-sized firms and focus on competitiveness, not protection.
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Frank, M. R. Momentum transfer dependence of medium effects in the (e,e{prime}) longitudinal response. Office of Scientific and Technical Information (OSTI), aprile 1994. http://dx.doi.org/10.2172/10142662.

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Frank, M. R. Momentum transfer dependence of medium effects in the (e,e{prime}) longitudinal response. Office of Scientific and Technical Information (OSTI), dicembre 1993. http://dx.doi.org/10.2172/10128233.

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Nguyen, Ngoc Anh, Ha-My Bui, Gia-Tan Nguyen, Manfred Kief e Christian Abeleda. Roles of Access to Finance in Small and Medium-Sized Enterprise Development in Viet Nam. Asian Development Bank, dicembre 2024. https://doi.org/10.22617/wps240576-2.

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This working paper explores the impact of access to finance on the development of small and medium-sized enterprises (SMEs) in Viet Nam, with a particular focus on the economic effects of a 2021 loan from the Asian Development Bank to the Vietnam International Bank. The study assesses the effect of loan access on SME operations and firm growth and estimates the aggregate impact on local economic development with a focus on job generation.
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Duflo, Esther. The Medium Run Effects of Educational Expansion: Evidence from a Large School Construction Program in Indonesia. Cambridge, MA: National Bureau of Economic Research, gennaio 2002. http://dx.doi.org/10.3386/w8710.

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Vera-Hernandez, Marcos. Medium- and long run effects of nutrition and child care: evaluation of a community nursery programme in rural Colombia. The IFS, novembre 2004. http://dx.doi.org/10.1920/wp.ifs.2024.4354.

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Yue, Tian, e Yan Wang. Effects of high-intensity interval training versus medium-intensity continuous training in cardiac rehabilitation: A systematic review and meta-analysis. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, aprile 2021. http://dx.doi.org/10.37766/inplasy2021.4.0077.

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Scholl, Lynn, Felipe Bedoya-Maya, Orlando Sabogal-Cardona e Daniel Oviedo. Making the Links between Ride-hailing and Public Transit Ridership: Impacts in Medium and Large Colombian Cities. Inter-American Development Bank, ottobre 2021. http://dx.doi.org/10.18235/0003697.

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Abstract (sommario):
As transit ridership continues to fall in many cities across the globe, key policy debates continue around whether Uber and other ride-hailing services are contributing to this trend. This research explores the effects of the introduction of ride-hailing to Colombian cities on public transportation ridership using Ubers timeline as case study. We test the hypothesis that ride-hailing may either substitute or compete with public transit, particularly in cities with large transit service gaps in coverage or quality. Our analysis builds on historic transit ridership data from national authorities and uses a staggered difference-in-difference model that accounts for fixed effects, seasonality, socioeconomic controls, and the presence of integrated transport systems. Despite large reductions in transit ridership in most cities, our results suggest that Uber is not statistically associated with the observed drop in ridership. Moreover, consistent with evidence from previous research, public transit reforms implemented between 2007 and 2015 throughout Colombian cities appear to have contributed substantially to the declines in transit ridership observed across the country. Findings in this paper inform policy-targeted insights and contribute to current debates of the links between ride-hailing and public transit in cities in Latin America.
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10

Liverpool-Tasie, Lenis Saweda O., Ahmed Salim Nuhu, Titus Awokuse, Thomas Jayne, Milu Muyanga, Adebayo Aromolaran e Adesoji Adelaja. Spillover Effects of Medium-Scale Farms on Smallholder Behaviour and Welfare: Evidence from Nigeria. Institute of Development Studies (IDS), marzo 2022. http://dx.doi.org/10.19088/apra.2022.009.

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Abstract (sommario):
Many countries across Africa are seeing an increasing share of farmland being classified as medium-scale farms (MSFs). MSFs are defined as farms operating between 5–100ha. MSFs co-exist with small-scale farms (SSFs, defined as farms below 5ha), who still constitute the majority of households in rural areas of Africa. While there is growing literature documenting the drivers of the rise of MSFs and their characteristics empirical evidence on how this rise in MSFs impacts neighbouring SSFs is still thin. This study addresses these observed gaps in the literature. We developed a theoretical model to explain some mechanisms through which spillovers on SSFs can be generated from the existence of MSFs around them. We empirically tested for evidence of these spillovers with data from Nigeria, Africa’s largest economy and most populous nation. By exploring the spillover effects of MSFs on a broader set of SSF outcomes, including input use, productivity, commercialisation and welfare (captured via several measures of household income and poverty status), this paper provides a more comprehensive view of spillover effects.
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