956 research outputs found
Renormalization Group Improvement and Dynamical Breaking of Symmetry in a Supersymmetric Chern-Simons-matter Model
In this work, we investigate the consequences of the Renormalization Group
Equation (RGE) in the determination of the effective superpotential and the
study of Dynamical Symmetry Breaking (DSB) in an N = 1 supersymmetric theory
including an Abelian Chern-Simons superfield coupled to N scalar superfields in
(2+1) dimensional spacetime. The classical Lagrangian presents scale
invariance, which is broken by radiative corrections to the effective
superpotential. We calculate the effective superpotential up to two-loops by
using the RGE and the beta functions and anomalous dimensions known in the
literature. We then show how the RGE can be used to improve this calculation,
by summing up properly defined series of leading logs (LL), next-to-leading
logs (NLL) contributions, and so on... We conclude that even if the RGE
improvement procedure can indeed be applied in a supersymmetric model, the
effects of the consideration of the RGE are not so dramatic as it happens in
the non-supersymmetric case.Comment: v4: 11 pages, 1 figure. Version accepted for publication in NP
Analysis of the Cytisetea scopario-striati scrubs in the south-west-centre of the Iberian Peninsula
The statistical and phytosociological study of 255 relevés taken in the south-west of the Iberian Peninsula and
made up of our own samples and previous publications reveals how close these relevés, previously ascribed to different
syntaxa, really are. Our re-arrangement of the data leads us to propose for the territory the 15 associations already published
and three new ones, namely: Genisto floridae-Adenocarpetum argyrophylli ass. nova hoc loco, Cytisetum bourgaei-
eriocarpi nova, Lavandulo viridis-Cytisetum striati ass. nova hoc. loco. We also suggest a name correction,
Adenocarpo anisochili-Cytisetum scoparii J.C. Costa et al. 2000 corr., and a status change, namely, Ulici latebracteati-
Cytisetum striati (Costa et al. 2000) status novo
Functions of and communication behavior on twitter after the 2015 Nepal earthquake
This paper looked into how Twitter was used by users three days after the 2015 Nepal earthquake and which communication behavior were reflected in the microblogs. Grounded on the Uses and Gratifications Theory (U>) and the Situational Theory of Publics (STP), this risk and crisis communication study proceeded with a content analysis of 300 tweets per day mined from April 26 to 28, 2015. After data mining, inter-rating schemes which involved four trained raters sat down to analyze the data based on the research problems. Results showed that the top function of Twitter was the helping function followed by information, communication, and political functions, respectively. Although the predominance of these functions were uniquely different compared with findings in previous studies, results revealed that certain functions of Twitter persisted across various crises. In addition, most users exhibited problem-facing behavior while only a number of users showed constrained behavior. This implied that those who took to Twitter possessed high problem recognition of the crisis and point to how Twitter was used to spread information, making it a very useful social media tool during a crisis. Moreover, results supported Grunig (2013) who argued that, in times of crisis, people become active users of social media tools. Implications for risk and crisis communication plans based on the findings of the study are discussed
Bioclimatology, structure, and conservation perspectives of Quercus pyrenaica, Acer opalus subsp. Granatensis, and Corylus avellana deciduous forests on Mediterranean bioclimate in the South-Central part of the Iberian Peninsula
The plant variability in the southern Iberian Peninsula consists of around 3500 different taxa due to its high bioclimatic, geographic, and geological diversity. The deciduous forests in the southern Iberian Peninsula are located in regions with topographies and specific bioclimatic conditions that allow for the survival of taxa that are typical of cooler and wetter bioclimatic regions and therefore represent the relict evidence of colder and more humid paleoclimatic conditions. The floristic composition of 421 samples of deciduous forests in the south-central part of the Iberian Peninsula were analyzed. The ecological importance index (IVI) was calculated, where the most important tree species were Quercuspyrenaica, Aceropalus subsp. Granatensis, and Corylusavellana. These species are uncommon in the south-central part of the Iberian Peninsula, forming forests of little extension. An analysis of the vertical distribution of the species (stratum) shows that the majority of the species of stratum 3 (hemicriptophics, camephytes, geophites, and nanophanerophytes) are characteristic of deciduous forests, and their presence is positively correlated with high values of bioclimatic variables related to humidity and presence of water in the soil (nemoral environments), while they are negatively correlated with high values of bioclimatic variables related to high temperatures, evapotranspiration, and aridity. This work demonstrates that several characteristic deciduous forest taxa are more vulnerable to disappearance due to the loss of their nemoral conditions caused by gaps in the tree or shrub canopy. These gaps lead to an increase in evapotranspiration, excess insolation, and a consequent loss of water and humidity in the microclimatic conditions.info:eu-repo/semantics/publishedVersio
Assessment of the radiological impact of a decommissioning nuclear power plant in Italy
The assessment of the radiological impact of a decommissioning Nuclear Power
Plant is presented here through the results of an environmental monitoring
survey carried out in the area surrounding the Garigliano Power Plant. The
levels of radioactivity in soil, water, air and other environmental matrices
are shown, in which {\alpha}, {\beta} and {\gamma} activity and {\gamma}
equivalent dose rate are measured. Radioactivity levels of the samples from the
Garigliano area are analyzed and then compared to those from a control zone
situated more than 100 km away. Moreover, a comparison is made with a previous
survey held in 2001. The analyses and comparisons show no significant
alteration in the radiological characteristics of the area surroundings the
plant, with an overall radioactivity depending mainly from the global fallout
and natural sources.Comment: 13 pages, 6 figures, 2 table
Assessment of the radiological impact of a decommissioning nuclear power plant in Italy
The assessment of the radiological impact of a decommissioning Nuclear Power
Plant is presented here through the results of an environmental monitoring
survey carried out in the area surrounding the Garigliano Power Plant. The
levels of radioactivity in soil, water, air and other environmental matrices
are shown, in which {\alpha}, {\beta} and {\gamma} activity and {\gamma}
equivalent dose rate are measured. Radioactivity levels of the samples from the
Garigliano area are analyzed and then compared to those from a control zone
situated more than 100 km away. Moreover, a comparison is made with a previous
survey held in 2001. The analyses and comparisons show no significant
alteration in the radiological characteristics of the area surroundings the
plant, with an overall radioactivity depending mainly from the global fallout
and natural sources
Influencia del aula invertida en la gestión pedagógica durante la educación a distancia
The essential objective of this study was to demonstrate the incidence of the inverted classroom in the pedagogical management of the teacher of the Ramón Castilla Educational Institution of the Chuschi district, Cangallo, Ayacucho, Peru, 2021, during remote education. The research responds to a quantitative approach, experimental type, pre-experimental design. The data was presented through descriptive and inferential results. The main result was that the teachers, before applying the inverted classroom, appreciated their pedagogical management as regular (42.9%); after being implemented, they estimated it as good (61.9%) because it allowed the activities to be designed collaboratively. It is concluded that the inverted classroom has a significant impact on pedagogical management during virtual education.El objetivo esencial de este estudio fue demostrar la incidencia del aula invertida en la gestión pedagógica del docente de la Institución Educativa Ramón Castilla del distrito Chuschi, Cangallo, Ayacucho, Perú, 2021, durante la educación remota. La investigación responde a un enfoque cuantitativo, tipo experimental, diseño pre experimental. Los datos fueron presentados por medio de resultados descriptivos e inferenciales. Se tuvo como resultado principal que los docente, antes de aplicar el aula invertida, apreciaron su gestión pedagógica como regular (42,9%); luego de ser implementada, la estimaron como buena (61,9%) porque permitió diseñar las actividades de manera colaborativa. Se concluye que el aula invertida incide de manera significativa en la gestión pedagógica durante una educación virtual.Esta pesquisa se concentra em determinar a influência da sala de aula invertida na gestão pedagógica dos professores da Instituição Educacional Ramón Castilla do distrito de Chuschi, Cangallo, Ayacucho, Peru, 2021, durante a educação a distância. O estudo respondeu a uma abordagem quantitativa, tipo experimental, desenho pré-experimental. Os dados foram apresentados por meio de estatística descritiva e inferencial. O principal resultado foi que os professores, antes de aplicar a aula invertida, valorizavam sua gestão pedagógica como regular (42,9%); Após a implantação, estimaram que era bom (61,9%), pois permitiu que as atividades fossem elaboradas de forma colaborativa. A pesquisa conclui que a sala de aula invertida influencia significativamente a gestão pedagógica de uma educação a distância
An NF-kB site in the 5'-untraslated leader region of the Human Immunodeficiency virus type 1 enhances the viral expression in response to NF-kB-activating stimuli.
The 5'-untranslated leader region of human immunodeficiency virus, type 1 (HIV-1), includes a complex array of putative regulatory elements whose role in the viral expression is not completely understood. Here we demonstrate the presence of an NF-κB-responsive element in the trans- activation response (TAR) region of HIV-1 that confers the full induction of HIV-1 long terminal repeat (LTR) in response to NF-κB-activating stimuli, such as DNA alkylating agents, phorbol 12-myristate 13-acetate, and tumor necrosis factor-α. The TAR NF-κB site GGGAGCTCTC spans from positions +31 to +40 and cooperates with the NF-κB enhancer upstream of the TATA box in the NF-κB-mediated induction of HIV-1 LTR. The conclusion stems from the following observations: (i) deletion of the two NF-κB sites upstream of the TATA box reduces, but does not abolish, the HIV-1 LTR activation by NF-κB inducers; (ii) deletion or base pair substitutions of the TAR NF-κB site significantly reduce the HIV-1 LTR activation by NF-κB inducers; (iii) deletions of both the NF-κB sites upstream of the TATA box and the TAR NF- κB site abolish the activation of HIV-1 LTR in response to NF-κB inducers. Moreover, the p50·p65 NF-κB complex binds to the TAR NF-κB sequence and trans-activates the TAR NF-κB-directed expression. The identification of an additional NF-κB site in the HIV-1 LTR points to the relevance of NF-κB factors in the HIV-1 life cycle
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