Probing the two-scale-factor universality hypothesis by exact rotation symmetry-breaking mechanism

We probe the two-scale factor universality hypothesis by evaluating, firstly explicitly and analytically at the one-loop order, the loop quantum corrections to the amplitude ratios for O($N$) $\lambda\phi^{4}$ scalar field theories with rotation symmetry-breaking in three distinct and independent methods in which the rotation symmetry-breaking mechanism is treated exactly. We show that the rotation symmetry-breaking amplitude ratios turn out to be identical in the three methods and equal to their respective rotation symmetry-breaking ones, although the amplitudes themselves, in general, depend on the method employed and on the rotation symmetry-breaking parameter. At the end, we show that all these results can be generalized, through an inductive process based on a general theorem emerging from the exact calculation, to any loop level and physically interpreted based on symmetry ideas.Comment: 17 pages, 3 figure

Fibrous model for the simulation of the cyclic behaviour of 3D reinforced concrete frames

Relatório 07-DEC/E-04Non-linear finite element analysis has attracted a lot of attention in last few decades, as real life problems dealing with analysis of concrete beams and columns are generally non-linear in nature. This project deals with non-linear analysis of beam and columns, using Timoshenko beam theory. The Timoshenko beam theory is applied to every element, but before applying the theory the element is divided into fibers. The fibers as a whole will govern the behavior of element. The section of each element is divided in “finite elements”. Each finite element is a fiber along the length of element. Each fiber element is independent in terms of the material constitutive laws, which govern the behavior, while at the same time they are associated to each other by the relation of displacements. The material laws of each fiber deals with the stress-strain relation The numerical results are compared with the experimental results, which show a reasonable correlation, and in turn demonstrate the capability of the proposed model to depict the cyclic behavior of concrete elements

Numerical model for CFRP confined concrete elements subject to monotonic and cyclic loadings

Uniaxial cyclic and monotonic compression tests were carried out on partially and fully wrapped concrete cylinders with Carbon Fibre Reinforced Polymer (CFRP) wet lay-up sheets. The influence of the concrete compressive strength, CFRP stiffness, geometric confinement arrangement and loading type on the compressive behaviour of reinforced concrete column elements of circular cross section up to their failure was assessed. A uniaxial stress-strain constitutive model is proposed, and the results obtained from the experimental tests were used to calibrate some of the parameters of this model, and to appraise the model performance. This model allows the simulation of reinforced concrete members by using Timoshenko one-dimensional elements, in the context of the finite element method (fibre model). Good agreement was obtained between numerical simulations and experimental results for both monotonic and cyclic loading tests.The first author acknowledges the support provided by the grant within the ambit of the research program PABERPRO supported by Program POCI 2010 - IDEIA, Project No. 13-05-04-FDR-00007, contract reference ADI/2007/V4.1/0049. The present work was also supported by Program PIDDAC, Project No. PTDC/ECM/74337/2006 by FCT. The authors acknowledge the materials generously supplied by S&P and Degussa Portugal

Design-curves of strain softening and strain hardening fibre reinforced concrete elements subjected to axial load and bending moments

Several structural components made by fibre reinforced concrete (FRC) are submitted to axial load and bending moments. In some cases fibres cannot replace completely the conventional reinforcement, even if strain hardening FRC is used; therefore the optimization of the reinforcement solution for these elements depends on the post-cracking behaviour of the FRC, as well as the percentage of conventional reinforcement to replace. To fully exploit the FRC capabilities, the development of a suitable, comprehensive and design-oriented model of its tensile response is of the utmost importance. To provide a practical tool for the pre-design of FRC-structural-elements subjected to axial load and bending moments, design curves were generated using a computational program capable of simulating the main features of the tensile and compressive behaviour of strain softening and strain hardening FRC’s, and steel bars. The post-cracking tensile behaviour of the FRC is characterized by two parameters that define its residual strength ratio (α) and its corresponding tensile strain ratio (β). To generate these curves, a parametric study is carried out based on the tensile parameters α and β and considering distinct mechanical reinforcement ratios, from 0 to 1 with a step of 0.2. For every reinforcement ratio, four distinct cases in terms of β are considered; additionally, for every case of β, α is divided from strain hardening to strain softening in five distinct residual strength classes. By sequentially varying α and β, the bending capacity of a section is evaluated to provide a design perspective of the effect of ductility and strength. The model used in this study is described, the design curves are presented and analyzed and some practical design examples are provided

Female genital mutilation/cutting in Sierra Leone: are educated women intending to circumcise their daughters?

BACKGROUND:Female genital mutilation/cutting (FGM/C) has been recognized as a gross violation of human rights of girls and women. This is well established in numerous international legal instruments. It forms part of the initiation ceremony that confers womanhood in Sierra Leone. Girls and women who are subjected to this practice are considered to be ready for marriage by their parents and communities and are rewarded with celebrations, gifts, and public recognition. Following this, we examined the relationship between education and women's FGM/C intention for their daughters in Sierra Leone. METHODS:We used cross-sectional data from the women's file of the 2013 Sierra Leone Demographic and Health Survey (SLDHS) to explore the influence of education on FGM/C intention among women in the reproductive age (15-49). A sample of 6543 women were included in the study. Our analysis involved descriptive computation of education and FGM/C intention. This was followed by a two-level multilevel analysis. Fixed effect results were reported as Odds Ratios and Adjusted Odds Ratios with their respective credible intervals (CrIs) whilst results of the random effects were presented as variance partition coefficients and median odds ratios. RESULTS:Our findings showed that women who had no formal education were more likely to intend to circumcise their daughters [aOR = 4.3, CrI = 2.4-8.0]. Among the covariates, women aged 20-24 [aOR = 2.3, CrI = 1.5-3.4] were more likely to intend to circumcise their daughters compared to women between 45 and 49 years old. Poorest women were more likely to report intention of circumcising their daughters in the future compared with the richest [aOR = 2.1, CrI = 1.3-3.2]. We noted that, 63.3% of FGM/C intention in Sierra Leone is attributable to contextual factors. CONCLUSION:FGM/C intention is more common among women with no education, younger women as well as women in the lowest wealth category. We recommend segmented female-child educational and pro-poor policies that target uneducated women in Sierra Leone. The study further suggests that interventions to end FGM/C need to focus on broader contextual and social norms in Sierra Leone

IMPLEMENTASI KRIMINALISTIK SEBAGAI ILMU BANTU DALAM PENYIDIKAN TINDAK PIDANA PENCURIAN DI KEPOLISIAN RESOR BULELENG

Pengungkapan tindak pidana pencurian di Kabupaten Buleleng, tidak selalu berjalan sesuai harapan.Sehubungan dengan hal itu penelitian ini meneliti: implementasi kriminalistik sebagai ilmu bantu dalam penyidikan tindak pidana pencurian di Kepolisian Resor Buleleng dan  kendala-kendala yang dihadapi  dan upaya mengatasi dalam implementasi kriminalistik sebagai ilmu bantu dalam penyidikan tindak pidana pencurian di Kepolisian Resor Buleleng. Penelitian ini menggunakan jenis penelitian hukum empiris dengan sifat deskriptif. Pengumpulan data sekunder dilakukan dengan studi dokumen dan pengumpulan data primer dengan wawancara bebas terpimpin. Data yang terkumpul dianalisis secara kualitatif. Implementasi kriminalistik sebagai ilmu bantu dalam penyidikan tindak pidana pencurian di Kepolisian Resor Buleleng sering dilakukan, terutama dalam hal belum ada cukup bukdi untuk menentukan tersangka dari tindak pidana pencurian yang terjadi. Bagian dari kriminalistik yang sering dimanfaatkan adalah metode sidik jari dan uji kebohongan. Kendala-kendala yang dihadapi  dalam implementasi kriminalistik sebagai ilmu bantu dalam penyidikan tindak pidana pencurian di Kepolisian Resor Buleleng adalah belum ada data sidik jari penduduk Kabupaten Buleleng secara lengkap, kurangnya tenaga ahli dan peralatan laboratorium. Upaya penyelesian dengan  memaksimalkan penggunaan metode lain, bekerja sama dengan Dinas Kependudukan dan Catatan Sipil Kabupaten Buleleng, memohon bantuan kepada kepada Bidang Laboratorium Forensik Polda Bali, bekerja sama dengan lembaga/institusi yang memiliki tenaga ahli dan peralatan yang memadai, seperti Universitas Pendidikan Ganesha (UNDIKSHA) dan Universitas Udayana (UNUD)

Viabilidade econômica do manejo de açaizais no estuário amazônico: estudo de caso na região do Rio Tauerá-açu, Abaetetuba - estado do Pará.

O objetivo deste estudo foi avaliar comparativamente o desempenho socioeconômico e a viabilidade econômica de sistemas produtivos de açaí manejado adotado pelos produtores e recomendado pela pesquisa agropecuária, em áreas de várzeas do estuário do rio Amazonas, no Estado do Pará. A coleta de dados para a análise do sistema de produção ocorreu por meio de entrevistas individuais com produtores e técnicos e pela realização de painéis técnicos reunindo produtores com experiência no desenvolvimento da atividade de manejo de açaizais. Foram estimados indicadores de rentabilidade e de viabilidade econômico-financeira para determinação do desempenho dos sistemas e realizadas análises de sensibilidade a variações de preços. Os resultados mostraram que tanto o sistema adotado pelo produtor quanto o sistema recomendado pela pesquisa apresentaram eficiência e viabilidade econômica, nas condições de produção e de mercado predominantes, com melhor desempenho e estabilidade para o sistema recomendado. A atividade de colheita é a etapa que representa maior custo no processo produtivo

Near surface mounted CFRP strips for the flexural strengthening of RC columns: experimental and numerical research

In the present work, a strengthening technique based on near surface mounted (NSM) carbon fibre laminate strips bonded into slits opened on the concrete cover is used to improve the flexural capacity of columns subjected to bending and compression. This technique avoids the occurrence of the peeling phenomenon, is able to mobilize the full strengthening capacity of the strips, and provides higher protection against fire and vandalism acts. The present paper describes the adopted strengthening technique and reports the experimental characterization of the materials involved in the strengthening process. The results obtained in two series of reinforced concrete columns, subjected to axial compression and lateral cyclic loading, show that a significant increase on the load carrying capacity can be achieved by using the NSM technique. Cyclic material constitutive laws were implemented in a finite element program and the tests with reinforced concrete columns strengthened with the NSM technique were numerically simulated under cyclic loading. These numerical simulations reproduce the experimental load-displacement diagrams satisfactorily.The study reported in this paper is included in the research program "CUTINSHEAR-Performance assessment of an innovative Structural FRP strengthening technique using an integrated system based oil optical fiber sensors" Supported by FCT, POCTI/ECM/59033/2004. The second author acknowledges the support provided by the grant in the ambit of this research project