Effect of a direct-fed microbial (Eubios 1090) in the presence of antibiotics (Carbadox or CTC-Denagard) on post-weaning pig growth performance and immune response

A study was conducted to determine the effects of a probiotic (Eubios 1090), in the presence of two different antibiotics, on performance in nursery pigs. A total of 216 pigs were weaned at an average of 21 d, blocked by initial body weight (BW = 6.79 kg), and distributed into 32 pens of 6 to 7 pigs per pen in an offsite nursery facility. Pens were randomly assigned to 1 of 4 dietary treatments (8 pens per treatment) that were fed throughout post-weaning phase 1 (day (D) 0 to 10), phase 2 (D 10 to 20), and phase 3 (D 20 to 34). Dietary treatments were: 1) Carbadox without Eubios 1090; 2) Chlortetracycline + Tiamulin (CTC-Denagard) without Eubios 1090; 3) Carbadox + Eubios 1090; and 4) CTC-Denagard + Eubios 1090. There was no interaction observed between the two antibiotics and addition of the probiotic. There was a tendency for greater gain to feed ratio (G:F) in phase 2 when nursery pigs received Carbadox compared to CTC-Denagard (P = 0.08), and a tendency for greater average daily feed intake (ADFI) in the overall nursery period when pigs were fed CTCDenagard compared to Carbadox (P = 0.10). Pigs that received the non-Eubios 1090 diets had greater average daily gain (ADG), G:F, and body weight (BW) during phase 2 compared to pigs that received diets containing Eubios 1090 (P = 0.05). In phase 3, pigs receiving the Eubios 1090 diet had increased ADG and G:F (P = 0.05). Between the Carbadox diet and the CTC-Denagard diet, the diet containing CTC-Denagard increased ADFI throughout the 3 phases. In summary, probiotic supplementation demonstrated negative effects in phase 2 and positive effects to growth performance in nursery pigs during the latter part of early post-weaning (phase 3)

A study of school and community literacy programs and their combined influences on long-term reading success of mainland Portuguese children.

In Southern New England as well as throughout the United States, middle school and high school aged language minority students are often found to be poor readers and writers of English despite their having received extensive English as a Second Language instruction in the primary grades. By and large, these are children who did not have the opportunity to fully develop literacy in their strongest language due to the school\u27s policy that they be exposed to English as soon and as much as possible. Such a dilemma produces two negative possibilities to the secondary student which often contributes to a decision to drop out of school: the students\u27 taking less demanding courses in which they do not wish to be enrolled, or the students\u27 being enrolled in the program of their choice and finding the level of scholarship which is required to be overwhelming. This study measures the effects of varying degrees of native language literacy development on the mainland Portuguese immigrant child\u27s later reading success in English as measured at the secondary school level. Specifically, it examines the impact of four to six years of participation in a community-operated, Portuguese language after-school program (in grades two through seven) on junior and senior high school English reading achievement as measured on the MAT6. The study also examines the relationship between participation in both this program and the primary grade (K-2) public school transitional bilingual education program in terms of later reading achievement in English. The results of the study indicate that a student\u27s chances to be a good reader in English increased proportionally with the degree of development he/she had attained in literacy in the native language. The most successful group consisted of students who had been enrolled in both the bilingual education program and the after-school, Escola Portuguesa program. Conclusions. That public schools consider either providing late-exit bilingual education programs instead of early-exit programs currently in use, or that they work to help community groups to design and implement their own structured, after-school programs whereby native literacy can develop beyond the level which is provided in the early-exit, TBE model

The Complexity of Helly-B1B_{1} EPG Graph Recognition

Golumbic, Lipshteyn, and Stern defined in 2009 the class of EPG graphs, the intersection graph class of edge paths on a grid. An EPG graph $G$ is a graph that admits a representation where its vertices correspond to paths in a grid $Q$, such that two vertices of $G$ are adjacent if and only if their corresponding paths in $Q$ have a common edge. If the paths in the representation have at most $k$ bends, we say that it is a $B_k$-EPG representation. A collection $C$ of sets satisfies the Helly property when every sub-collection of $C$ that is pairwise intersecting has at least one common element. In this paper, we show that given a graph $G$ and an integer $k$, the problem of determining whether $G$ admits a $B_k$-EPG representation whose edge-intersections of paths satisfy the Helly property, so-called Helly-$B_k$-EPG representation, is in NP, for every $k$ bounded by a polynomial function of $|V(G)|$. Moreover, we show that the problem of recognizing Helly-$B_1$-EPG graphs is NP-complete, and it remains NP-complete even when restricted to 2-apex and 3-degenerate graphs

Advances on Dipterology in the 21st century and extinction rates

At least one million extant insect species have been described on Earth, of which 150,000 belong to the megadiverse order Diptera. We here synthesize data from the last 15 years of taxonomic work in Diptera, mapping the world taxonomic productivity in the order. Our data shows an increasing importance of China and Brazil in taxonomic production, along with other traditional centres such as the USA and Europe. We correlate our database with estimates of extinction rates to determine the amount of basic taxonomic research still necessary to have the description of the fly diversity before extinction. Due to the growing recent extinction rates, it is unlikely that we will be able to entirely describe unknown fly diversity before their demise. Even considering that is still a constant and increasing speed of new species description, raising the number of active dipterists in the world is an urgent priority and the only real solution

Matrices totally positive relative to a tree, II

If T is a labelled tree, a matrix A is totally positive relative to T , principal submatrices of A associated with deletion of pendent vertices of T are P-matrices, and A has positive determinant, then the smallest absolute eigenvalue of A is positive with multiplicity 1 and its eigenvector is signed according to T . This conclusion has been incorrectly conjectured under weaker hypotheses.We are grateful for the exhaustive comments given by the referee. His comments and suggestions have improved the presentation of the manuscript. The author R.S.Costas-Santos acknowledges financial support by Dirección General de Investigación, Ministerio de Economía y Competitividad of Spain, grant MTM2012-36732-C03-01

Lifting the dust veil from the Globular Cluster Palomar2

This work employs high-quality {\em Hubble Space Telescope} ({\em HST}) Advanced Camera for Surveys (ACS) F606W and F814W photometry to correct for the differential reddening affecting the colour-magnitude diagram (CMD) of the poorly-studied globular cluster (GC) Palomar\,2. Differential reddening is taken into account by assuming that morphological differences among CMDs extracted across the field of view of Palomar\,2 correspond essentially to shifts (quantified in terms of $\delta E(B-V)$) along the reddening vector due to a non-uniform dust distribution. The average reddening difference over all partial CMDs is $\overline{\delta E(B-V)}=0.24\pm0.08$, with the highest reaching $\delta E(B-V) =0.52$. The corrected CMD displays well-defined and relatively narrow evolutionary sequences, especially for the evolved stars, i.e. the red-giant, horizontal and asymptotic giant branches (RGB, HB and AGB, respectively). The average width of the upper main sequence and RGB profiles of the corrected CMD corresponds to 56\% of the original one. Parameters measured on this CMD show that Palomar\,2 is $\approx13.25$\,Gyr old, has the mass $M\sim1.4\times10^5\,m_\odot$ stored in stars, is affected by the foreground $E(B-V)\approx0.93$, is located at $d_\odot\approx26$\,Kpc from the Sun, and is characterized by the global metallicity $Z/Zo\approx0.03$, which corresponds to the range $-1.9\leq [Fe/H] \leq-1.6$ (for $0.0\leq[\alpha/Fe]\leq+0.4$), quite consistent with other outer halo GCs. Additional parameters are the absolute magnitude $M_V\approx-7.8$, and the core and half-light radii $r_C\approx2.6$\,pc and $R_{HL}\approx4.7$\,pc, respectively.Comment: Accepted for publication by MNRA

Towards quantum gravity measurement by cold atoms

Peer reviewedPreprin

Pourquoi les immigrés portugais veulent-ils tant retourner au pays ?

A partir des données de l'enquête sur le Passage à la Retraite des Immigrés réalisée en 2003, cet article cherche à comprendre pourquoi les ressortissants d'origine portugaise résidant en France se singularisent par des intentions de retour au pays à la retraite deux fois supérieures à celles de leurs homologues espagnols et italiens. Les différences communautaires relatives au niveau d'éducation, à la durée de séjour, à la maîtrise de la langue française, à la localisation des membres de la famille et à l'origine de l'éventuel conjoint expliquent une part importante de l'écart observé. L'application de techniques de décomposition non-linéaire révèle que près de 70% des écarts dans les intentions de retour entre les ressortissants du Portugal et les ressortissants d'Espagne et d'Italie s'expliquent par des différences entre les caractéristiques retenues, tandis qu'un tiers de l'écart observé est lié à l'effet différencié des facteurs influençant le souhait de localisation à la retraite

Human capital background and the educational attainment of the second-generation immigrants in France

In this paper, we study the impact of the human capital background on ethnic educational gaps between second-generation immigrants in France. First, we show that the skill of immigrants explains the main part of the ethnic educational gap between their children. More precisely, if the education of immigrants has a predominant impact on the educational attainment of their children, their assimilation degree, essentially captured by their French fluency or their length of stay in France, also contributes to explain ethnic educational gaps. Secondly, we show that the impact of the immigrants' education on the educational attainment of their children depends on their country of origin, their place of schooling as well as their French proficiency