Coulomb breakup of 22C in a four-body model

Breakup cross sections are determined for the Borromean nucleus 22C by using a four-body eikonal model, including Coulomb corrections. Bound and continuum states are constructed within a 20C + n + n three-body model in hyperspherical coordinates. We compute continuum states with the correct asymptotic behavior through the R-matrix method. For the n+ n potential, we use the Minnesota interaction. As there is no precise experimental information on 21C, we define different parameter sets for the 20C + n potentials. These parameter sets provide different scattering lengths, and resonance energies of an expected 3/2+ excited state. Then we analyze the 22C ground-state energy and rms radius, as well as E1 strength distributions and breakup cross sections. The E1 strength distribution presents an enhancement at low energies. Its amplitude is associated with the low binding energy, rather than with a three-body resonance. We show that the shape of the cross section at low energies is sensitive to the ground-state properties. In addition, we suggest the existence of a low-energy 2+ resonance, which should be observable in breakup experiments

Microscopic description of 7^7Li in the 7Li+12C^{7}\text{Li}+^{12}\text{C} and 7Li+28Si^7\text{Li}+^{28}\text{Si} elastic scattering at high energies

We employ a microscopic continuum-discretized coupled-channels reaction framework (MCDCC) to study the elastic angular distribution of the $^7$Li$=\alpha+t$ nucleus colliding with $^{12}$C and $^{28}$Si targets at $E_{\text{Lab}}$=350 MeV. In this framework, the $^7$Li projectile is described in a microscopic cluster model and impinges on non-composite targets. The diagonal and coupling potentials are constructed from nucleon-target interactions and $^7$Li microscopic wave functions. We obtain a fair description of the experimental data, in the whole angular range studied, when continuum channels are included. The inelastic and breakup angular distributions on the lightest target are also investigated. In addition, we compute $^{7}$Li$+^{12}$C MCDCC elastic cross sections at energies much higher than the Coulomb barrier and we use them as reference calculations to test the validity of multichannel eikonal cross sections.Comment: 9 Pages, 6 Figure

Changes in the structure of world trade in agri-food products: evidence from gravity modelling in a long term perspective, 1950-2000

This study examines the reasons for changes in the composition of international trade in agricultural and food products. We use a Gravity Model to compare the impact of the key factors in bilateral agri-food trade, which we split into three main product groups, between 1963 and 2000 for a representative sample of 40 countries. Our results show how intervention and/or protectionism, the level of participation in intra-industrial trade and the effects of national and per capita income growth have determined the rise in high value-added products and processed goods and the declining share of traditional, basic commodities.Agri-food trade, Gravity Model, GATT, Regional Trade Agreements, home market effect

Market Access Spillovers: An Empirical Approach to the Flagship Firm Effect

This paper intends to contribute to the knowledge on the externalities produced by a foreign industry within the host region of the investment. Particularly, this study focuses on the influence of internationalization strategies implemented by a foreign industry on the local territory when its workers install their own companies or are hired by local companies, and on the effect of imitation strategies within the local environment. This analysis reveals a positive correlation between the territorial strategy of the industry and the permeability of its organization, and also between the maturity of the investment, new market access strategies, and the local impact. On the other hand, the productive linkage established between local and foreign companies and the previous labor relationship of its owner or administrators influence the internationalization process.

Entrepreneurship and performance around MNC affiliates

The aim of this study is the analysis of the influence of a multinational company (MNC) on its local supplier’s network within the host territory. We have particularly focused on how the MNC influences the performance of supplier as well as non-supplier local companies. Our study has shown the how the existence of knowledge transfer influences productivity through the productive linkage established with local suppliers and their hiring of MNC former managers. Direct local suppliers have been shown to experience higher productivity than do local suppliers from lower levels of the supply chain. Similarly, local suppliers hiring MNC former managers have shown higher productivity than those who have hired only local managers. In addition, no significant differences in productivity have been found between strategic and non-strategic suppliers.

Why are some Spanish regions so much more efficient than others?

This article investigates the main sources of heterogeneity in regional efficiency. We estimate a translog stochastic frontier production function in the analysis of Spanish regions in the period 1964-1996, to attempt to measure and explain changes in technical efficiency. Our results confirm that regional inefficiency is significantly and positively correlated with the ratio of public capital to private capital. The proportion of service industries in the private capital, the proportion of public capital devoted to transport infrastructures, the industrial specialization, and spatial spillovers from transport infrastructures in neighbouring regions significantly contributed to improve regional efficiency.Regional efficiency, Regional spillovers, Human capital, Public capital

Postpartum Patients Reports of Satisfaction with a Welcome Meal after a Vaginal Delivery

Objective: The purpose of this research study was to assess patient perspectives regarding a special Welcome Meal. The focus was on patients\u27 feeling welcomed and important because prior research has shown that when a patient\u27s expectations are exceeded, patient satisfaction increases. This study suggests that receiving a Welcome Meal may improve their experience on a postpartum unit. Design: Prior to discharge, each patient on the maternity unit was served a special Welcome Meal. A questionnaire was given to patients that consisted of six questions. The six questions incorporated six themes found in research literature on improving patient satisfaction. These themes included exceeding one\u27s expectations, feeling important, feeling welcome, having a positive experience, increasing one\u27s morale and providing good quality food. Patients/Participants: The sample consist~d of 30 postpartum patients between the ages of 20-47 whom had undergone a vaginal delivery of a live infant. Results: The highest rated question indicated that the Welcome Meal made the patients feel welcome (96.6%). The second highest rated question shows the Welcome Meal to be of good quality (96.6%). The Welcome Meal not only made the patient feel important, but also created a more pleasant hospital experience. Overall 86.6% agreed that it gave a positive experience and exceeded their expectations (90%). Conc1usion: The research indicated that the six themes found in improving patient satisfaction were also present when asked about the Welcome Meal. The limitations to the study include having a small non-random sample of 30 patients. This study suggests that having such a meal implemented on the maternity unit may have a positive impact on patient satisfaction. Future studies should provide a larger sample size. Further research is needed to correlate improved patient satisfaction and the Welcome Meal in a pre and post test design

The agricultural and food trade in the first globalisation: Spanish table wine exports 1871 to 1935 – a case study

wine trade, economic history, Spain, wine, globalization, Agricultural and Food Policy, International Relations/Trade, Q17, Q18, N53, N54,

“Horn Of Plenty” Revisited: The Globalization Of Mediterranean Horticulture And The Economic Development Of Spain, 1850-1935

This paper analizes the impact of the globalization of Mediterranean horticultural products (MHP). From 1850 onwards, the Mediterranean countries took advantage of the new opportunities that arose to increase their production and trade in MHP. The Spanish case shows how the high elasticity of supply with respect to prices helps to explain the enormous increase of its production and trade in MHP, that became the most dynamic sector of Spanish agriculture. The analysis of the counterfactual case of the non-existence of US MHP emphasizes the cost of this increasing competition to the traditional producers from the end of the nineteenth century.Globalization, International Markets, Spanish Economic Development, International Trade, Mediterranean Horticultural Products.

The Plasmid Mobilome of the Model Plant-Symbiont Sinorhizobium meliloti: Coming up with New Questions and Answers

Rhizobia are Gram-negative Alpha- andBetaproteobacteria living in the underground that have theability to associate with legumes for the establishment ofnitrogen-fixing symbioses.Sinorhizobium melilotiinparticular—the symbiont ofMedicago,Melilotus, andTrigonellaspp.—has for the past decades served as a model organism forinvestigating, at the molecular level, the biology, biochemistry,and genetics of a free-living and symbiotic soil bacterium ofagricultural relevance. To date, the genomes of seven differentS. melilotistrains have been fully sequenced and annotated,and several other draft genomic sequences are also available(http://www.ncbi.nlm.nih.gov/genome/genomes/1004).The vast amount of plasmid DNA thatS. melilotifrequently bears(up to 45% of its total genome), the conjugative ability of some ofthose plasmids, and the extent of the plasmid diversity hasprovided researchers with an extraordinary system to investigatefunctional and structural plasmid molecular biology within theevolutionary context surrounding a plant-associated modelbacterium. Current evidence indicates that the plasmidmobilome inS. melilotiis composed of replicons varying greatlyin size and having diverse conjugative systems and propertiesalong with different evolutionary stabilities and biological roles.While plasmids carrying symbiotic functions (pSyms) are knownto have high structural stability (approaching that ofchromosomes), the remaining plasmid mobilome (referred to asthe non-pSym,functionally cryptic,oraccessorycompartment)has been shown to possess remarkable diversity and to be highlyactive in conjugation. In light of the modern genomic andcurrent biochemical data on the plasmids ofS. meliloti,the current article revises their main structural components,their transfer and regulatory mechanisms, and their potentialas vehicles in shaping the evolution of the rhizobial genome.Fil: Lagares, Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Biotecnología y Biología Molecular. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Biotecnología y Biología Molecular; ArgentinaFil: Sanjuán Pinilla, Juan. Consejo Superior de Investigaciones Científicas. Estación Experimental del Zaidín; EspañaFil: Pistorio, Mariano. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Biotecnología y Biología Molecular. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Biotecnología y Biología Molecular; Argentin