Jet reconstruction and jet background classification with the ALICE experiment in PbPb collisions at the LHC

For a quantitative interpretation of reconstructed jet properties in heavy-ion collisions it is paramount to characterize the contribution from the underlying event and the influence of background fluctuations on the jet signal. In addition to the pure number fluctuations, region-to-region correlated background within one event can enhance or deplete locally the level of background and modify the jet energy. We show a first detailed assessment of background effects using different probes embedded into heavy-ion data and quantify their influence on the reconstructed jet spectrum.Comment: 4 pages, 2 figures, Proceedings for the XXII International Conference on Ultra-Relativistic Nucleus-Nucleus Collisions, Quark Matter 2011, Annec

Extremal Black Attractors in 8D Maximal Supergravity

Motivated by the new higher D-supergravity solutions on intersecting attractors obtained by Ferrara et al. in [Phys.Rev.D79:065031-2009], we focus in this paper on 8D maximal supergravity with moduli space [SL(3,R)/SO(3)]x[SL(2,R)/SO(2)] and study explicitly the attractor mechanism for various configurations of extremal black p- branes (anti-branes) with the typical near horizon geometries AdS_{p+2}xS^{m}xT^{6-p-m} and p=0,1,2,3,4; 2<=m<=6. Interpretations in terms of wrapped M2 and M5 branes of the 11D M-theory on 3-torus are also given. Keywords: 8D supergravity, black p-branes, attractor mechanism, M-theory.Comment: 37 page

Jet substructure as a new Higgs search channel at the LHC

It is widely considered that, for Higgs boson searches at the Large Hadron Collider, WH and ZH production where the Higgs boson decays to b anti-b are poor search channels due to large backgrounds. We show that at high transverse momenta, employing state-of-the-art jet reconstruction and decomposition techniques, these processes can be recovered as promising search channels for the standard model Higgs boson around 120 GeV in mass.Comment: 4 pages, 3 figure

The Standard Model of Leptons as a Purely Vectorial Theory

We propose a way to reconcile the Standard Model of leptons with a purely vectorial theory. The observed neutrino is predicted to be massless. The unobservability of its partner and the $V-A$ structure of the weak currents are given the same origin.Comment: 10 pages. Latex, 8 postscript figures included. We have corrected 2 (cancelling) sign misprints, and made explicit that we also recover the usual couplings of the U(1) gauge field B. The conclusions are unchanged. PAR-LPTHE 93/1

Design and Implementation of Low-cost Wideband Vivaldi Antenna for Ground Penetrating Radar

Vivaldi antenna is one of the many types of antenna implemented on ground penetrating radar (GPR). Its characteristics are pointed radiation and wide bandwidth. This study aims to design an antenna used in GPR for non-destructive test application on a transportation to check the roadway material. This Vivaldi antenna has a wide bandwidth, 1 GHz approximately, with the frequency range between 1 GHz and 2 GHz. This Vivaldi antenna design is obtained by changing few parameters of common Vivaldi antenna to fulfill its design characteristics: low cost and wide bandwidth. The antenna size is 350mm x 300mm. The simulation result shows that there is a return loss below –10 dB for 1–2 GHz frequency range, and the lowest return loss at that frequency range is around –35 dB on 1.4 GHz. This article also explains about the effect of tapered slot size changes to return loss value and frequency. When the antenna width is enlarged, the value of return loss is gets smaller in the lower frequency. Therefore, antenna bandwidth gets wider. The same happens when tapered slot size gets bigger value, the antenna working frequency switches into the lower frequency. It can be concluded that antenna bandwidth widening can be done by enlarging tapered length value and reducing tapered rate value. &nbsp; &nbsp; Keywords: Vivaldi antenna, ground penetrating radar, optimization, low cost antenna, wide bandwidt

Metacognitive Online Reading Strategy Practiced By English Students

This research aims to find out the level of metacognitive reading strategy use by the students in online reading. The subjects of this research were sixth semester students of English Education Study Program. There were 48 students involved to gather the data. The method used in this research is descriptive method. The data were derived through students response to the OSORS questionnaire. The data revealed that in fact the students use metacognitive reading strategy in reading online. The most preferable strategy used by the students was problem solving reading strategy. Furthermore, the data showed that there were 66.7% students fell as moderate strategy users, 25 % fell as high strategy users, and 12.5% fell as low strategy users

Frekuensi Trait Thalassemia-B Di Maumere, Flores

Genetic screening for P-thalassemia trait has been carried out in Maumere, Flores - Eastern Nusa Tenggara Province, an eastern Indonesian region with strong Melanesian influence where no HbE is found. Some 103 adult healthy unrelated individuals consists of 22 males and 81 females mostly student nurses participated in the study. Three blood indices, hemoglobin concentration, packed cell volume and MCHC were normal. Quantification of separated hemoglobin fractions following electrophoresis showed six individuals with P-thalassemia trait (6%) and one individual with HbAE heterozygote. The occurrence of 6% carrier of this genetic traits with low gene frequency of HbE comparable with previous studies in Java confirms the interaction of P-thalassemia and HbE distribution in malaria endemic region. Further measures include premarital genetic counseling should be considered to avoid public health problem that may be created in the future. Key Words: genetic screening, p-thalassemia trait, HhAE heterozygote, malaria endemic, premarital genetic counselin

Stable de Sitter Vacua in 4 Dimensional Supergravity Originating from 5 Dimensions

The five dimensional stable de Sitter ground states in N=2 supergravity obtained by gauging SO(1,1) symmetry of the real symmetric scalar manifold (in particular a generic Jordan family manifold of the vector multiplets) simultaneously with a subgroup R_s of the R-symmetry group descend to four dimensional de Sitter ground states under certain conditions. First, the holomorphic section in four dimensions has to be chosen carefully by using the symplectic freedom in four dimensions; and second, a group contraction is necessary to bring the potential into a desired form. Under these conditions, stable de Sitter vacua can be obtained in dimensionally reduced theories (from 5D to 4D) if the semi-direct product of SO(1,1) with R^(1,1) together with a simultaneous R_s is gauged. We review the stable de Sitter vacua in four dimensions found in earlier literature for N=2 Yang-Mills Einstein supergravity with SO(2,1) x R_s gauge group in a symplectic basis that comes naturally after dimensional reduction. Although this particular gauge group does not descend directly from five dimensions, we show that, its contraction does. Hence, two different theories overlap in certain limits. Examples of stable de Sitter vacua are given for the cases: (i) R_s=U(1)_R, (ii) R_s=SU(2)_R, (iii) N=2 Yang-Mills/Einstein Supergravity theory coupled to a universal hypermultiplet. We conclude with a discussion regarding the extension of our results to supergravity theories with more general homogeneous scalar manifolds.Comment: 54 page

CULTURAL VALUE ORIENTATION OF SANDO BATU INDIGENOUS COMMUNITY

The focus of this research was to explore the Sando Batu indigenous community who live in harmony with nature. This study aimed to describe the cultural values orientation of the community. The study used a phenomenological approach by combining three methods of data collection, namely interviews, participant observation, and documentation. The theoretical framework used was Kluckhon value orientation which was widely used. The study was carry out on hamlet of Wala-wala of Pitu Riase Subdistrict of Sidenreng Rappang district where this community settle. The informants in this study consisted of seven people who were determinedby snowball sampling technique. The first informant was selected purposively namely the former head of the village and then the rest of informants were selected by snowball technique. The data were analyzed by using Interpretative Phenomenological Analysis (IPA). The results showed that the cultural values orientation of indigenous communities Sando Batu believes that life is difficult but must still be fought, the work is for survival, oriented to the future, harmony with nature, and relationship with one another was horizontal relationship