Impact of inter-modal four-wave mixing on the performance of mode- and wavelength-division-multiplexing systems

In this paper, we investigate the impact of inter-modal four-wave mixing on mode- and wavelength-division-multiplexing systems. A set of coupled nonlinear Schrödinger equations, including linear mode coupling, is derived allowing to isolate the inter-modal four-wave mixing terms. The efficiency of inter-modal four-wave mixing between degenerate LP modes is found to be significantly higher than the intra-modal four-wave mixing efficiency. However, it is shown that the inter-modal four-wave mixing efficiency between degenerate modes is significantly reduced by the linear mode coupling.

Simultaneous measurement for liquid level and refractive index based on all-fiber modal interferometer

A simple fiber sensor capable of simultaneous measurement of liquid level and refractive index (RI) is proposed and experimentally demonstrated. The sensing head is an all-fiber modal interferometer manufactured by splicing an uncoated single-mode fiber with two short sections of multimode fiber. The interference pattern experiences blue shift along with an increase of axial strain and surrounding RI. Owing to the participation of multiple cladding modes with different sensitivities, the height and RI of the liquid could be simultaneously measured by monitoring two dips of the transmission spectrum. Experimental results show that the liquid level and RI sensitivities of the two dips are 245.7 pm/mm, -38 nm/RI unit (RIU), and 223.7 pm/mm, -62 nm/RIU, respectively. The approach has distinctive advantages of easy fabrication, low cost, and high sensitivity for liquid level detection with the capability of distinguishing the RI variation simultaneously. © 2013 Copyright Taylor and Francis Group, LLC.

Pd/C catalysts based on synthetic carbons with bi- and tri-modal pore-size distribution:applications in flow chemistry

Two new types of phenolic resin-derived synthetic carbons with bi-modal and tri-modal pore-size distributions were used as supports for Pd catalysts. The catalysts were tested in chemoselective hydrogenation and hydrodehalogenation reactions in a compact multichannel flow reactor. Bi-modal and tri-modal micro-mesoporous structures of the synthetic carbons were characterised by N2 adsorption. HR-TEM, PXRD and XPS analyses were performed for characterising the synthesised catalysts. N2 adsorption revealed that tri-modal synthetic carbon possesses a well-developed hierarchical mesoporous structure (with 6.5 nm and 42 nm pores), contributing to a larger mesopore volume than the bi-modal carbon (1.57 cm3 g-1versus 1.23 cm3 g-1). It was found that the tri-modal carbon promotes a better size distribution of Pd nanoparticles than the bi-modal carbon due to presence of hierarchical mesopore limitting the growth of Pd nanoparticles. For all the model reactions investigated, the Pd catalyst based on tri-modal synthetic carbon (Pd/triC) show high activity as well as high stability and reproducibility. The trend in reactivities of different functional groups over the Pd/triC catalyst follows a general order alkyne ≫ nitro > bromo ≫ aldehyde.

Um Framework para criação de jogos voltados para o ensino de lógica de programação

Digital games have been used as aiding tool for transmission of knowledge, allowing faster dissemination of content. Using this strategy of disseminating logical reasoning development for basic school children can be the motivating gear that helps in the learning process for any area. In this context, many games can be created and provided for the use of teacher and student. However, the complexity of construction of these games becomes a obstacle which can, often, prevent their construction. Thus, this paper presents a framework for creating games, which teach programming logic, presenting from their conception to their integration with the visual programming environment (Blockly) and scenarios created in HTML5.

Técnica para segmentação automática de imagens microscópicas de componentes sanguíneos e classificação diferencial de leucócitos baseada em lógica fuzzy

Automatic detection of blood components is an important topic in the field of hematology. The segmentation is an important stage because it allows components to be grouped into common areas and processed separately and leukocyte differential classification enables them to be analyzed separately. With the auto-segmentation and differential classification, this work is contributing to the analysis process of blood components by providing tools that reduce the manual labor and increasing its accuracy and efficiency. Using techniques of digital image processing associated with a generic and automatic fuzzy approach, this work proposes two Fuzzy Inference Systems, defined as I and II, for autosegmentation of blood components and leukocyte differential classification, respectively, in microscopic images smears. Using the Fuzzy Inference System I, the proposed technique performs the segmentation of the image in four regions: the leukocyte’s nucleus and cytoplasm, erythrocyte and plasma area and using the Fuzzy Inference System II and the segmented leukocyte (nucleus and cytoplasm) classify them differentially in five types: basophils, eosinophils, lymphocytes, monocytes and neutrophils. Were used for testing 530 images containing microscopic samples of blood smears with different methods. The images were processed and its accuracy indices and Gold Standards were calculated and compared with the manual results and other results found at literature for the same problems. Regarding segmentation, a technique developed showed percentages of accuracy of 97.31% for leukocytes, 95.39% to erythrocytes and 95.06% for blood plasma. As for the differential classification, the percentage varied between 92.98% and 98.39% for the different leukocyte types. In addition to promoting auto-segmentation and differential classification, the proposed technique also contributes to the definition of new descriptors and the construction of an image database using various processes hematological staining

Um olhar sobre a música gospel: a lógica simbólica e de mercado do Ministério de Louvor Diante do Trono

This study aims to understand how the gospel music genre - based on the gospel band Ministério de Louvor Diante do Trono - articulates itself to the logic of the market by its insertion in the music industry and use of symbolic logic in the available songs of their Cds and DVDs. Our research is a case study, methodologically being the descriptive analysis of the production process, distribution and broadcasting of the band's CDs and functional analysis of the music that permeates the entire thesis. The following songs are presented as an analytical corpus: Preciso de Ti,Quero me Apaixonar, Tua Visão, Creio, Tu Reinas e Tetelestai. Our hypothesis is that religious institutions - as a field responsible for the structure which maintains gospel artists - experiences a new dynamic that consists of a superficial modernity, ratified in the ways the symbolic goods produced communicate, that is, simulate a religious modernity maintaining traditional values regarding the dogmas of religion , but incorporate business and advertising procedures in the dissemination of its products The results point to gospel music as mediation, part of the religious ritual sometimes as prayer and other as preaching, stimulating consumption and entertainment, and performing as a device in the making of symbolic goods.

Experimental investigation into amplitude-dependent modal properties of an eleven-span motorway bridge

The authors would like to thank their supporters. New Zealand Earthquake Commission (EQC) Research Foundation provided financial support for experimental work (Grant No. UNI/578). New Zealand Transport Agency (NZTA) provided access to the bridge. Piotr Omenzetter’s work within the LRF Centre for Safety and Reliability Engineering at the University of Aberdeen is supported by Lloyd’s Register Foundation. The Foundation helps to protect life and property by supporting engineering-related education, public engagement and the application of research. Ge-Wei Chen’s doctoral study is supported by China Scholarship Council (CSC) (Grant No. 2011637065).

Modal identification of a twelve span viaduct in two different construction stages via ambient dynamic testing

Peer reviewed

Comparison of output-only methods for modal identification of a twelve-span viaduct

Peer reviewed

Development of Multi-modal and Super-resolved Retinal Imaging Systems

Advancements in retinal imaging technologies have drastically improved the quality of eye care in the past couple decades. Scanning laser ophthalmoscopy (SLO) and optical coherence tomography (OCT) are two examples of critical imaging modalities for the diagnosis of retinal pathologies. However current-generation SLO and OCT systems have limitations in diagnostic capability due to the following factors: the use of bulky tabletop systems, monochromatic imaging, and resolution degradation due to ocular aberrations and diffraction.

Bulky tabletop SLO and OCT systems are incapable of imaging patients that are supine, under anesthesia, or otherwise unable to maintain the required posture and fixation. Monochromatic SLO and OCT imaging prevents the identification of various color-specific diagnostic markers visible with color fundus photography like those of neovascular age-related macular degeneration. Resolution degradation due to ocular aberrations and diffraction has prevented the imaging of photoreceptors close to the fovea without the use of adaptive optics (AO), which require bulky and expensive components that limit the potential for widespread clinical use.

In this dissertation, techniques for extending the diagnostic capability of SLO and OCT systems are developed. These techniques include design strategies for miniaturizing and combining SLO and OCT to permit multi-modal, lightweight handheld probes to extend high quality retinal imaging to pediatric eye care. In addition, a method for extending true color retinal imaging to SLO to enable high-contrast, depth-resolved, high-fidelity color fundus imaging is demonstrated using a supercontinuum light source. Finally, the development and combination of SLO with a super-resolution confocal microscopy technique known as optical photon reassignment (OPRA) is demonstrated to enable high-resolution imaging of retinal photoreceptors without the use of adaptive optics.

Educação Física Escolar, Relatório Jacques Delors e PCN's : Adaptação à lógica do capitalismo contemporâneo

artigo problematiza quais seriam as principais demandas para o ensino Educaçao Física escolar no capitalismo contemporâneo do ponto de vista hegemônico em que a centralidade nos processos educacionais é ocupada por disciplinas que possuem uma dimensao mais cognitiva, tais como Português e Matemática. Sendo assim, buscou-se apreender como a noçao de competência vem assumindo a centralidade na esfera educativa ao mesmo tempo em que coloca os saberes e o conhecimento em segundo plano. Além disto, identificar e compreender como a tendência colocada acima, sob a égide de dois documentos oficiais: Relatório Jacques Delors no plano internacional e Parâmetros Curriculares Nacionais no plano brasileiro repercutem nos saberes a serem trabalhados pela Educaçao Física no atual momento histórico foi centralmente importante. A partir dos elementos trabalhados, chegou-se ao entendimento de que a Educaçao Física imediatamente nao contribui para a formaçao exigida pela gestao de trabalho flexível, porém mediatamente sim, quando o trabalho pedagógico se volta, essencialmente, para a perspectiva de instrumentalizar os alunos para a resoluçao de problemas e a tomada de decisoes acertadas ao longo da vida

Lógica interna y Educación Física. Presentación de un proyecto de investigación

En esta ponencia realizaremos sucintamente la presentación de un proyecto de investigación que ha sido recientemente acreditado en la UNLP (Saraví, 2015). Dicha pesquisa está centrada en el estudio de la lógica interna (Parlebas, 1981, 2001), desde el marco teórico de la Praxiología Motriz. Al respecto, y desde esta perspectiva de análisis, nos interesa indagar en cómo los profesores de Educación Física de la ciudad de La Plata y Ensenada llevan adelante la enseñanza de diferentes prácticas corporales en instituciones educativas, clubes y/o espacios no formalizados. Asimismo buscamos conocer las características y rasgos de algunas de esas prácticas corporales -es decir, su lógica interna-, buscando las articulaciones con la Educación Física y tratando de indagar respecto a sí los profesores de esta disciplina conocen o no el concepto, y como lo utilizan. En este proyecto nos interesa particularmente explicar cómo opera el conocimiento de la lógica interna de esas prácticas en lo que concierne a su enseñanza y-o su gestión por parte de los docentes del área

Educação Física Escolar, Relatório Jacques Delors e PCN's : Adaptação à lógica do capitalismo contemporâneo

artigo problematiza quais seriam as principais demandas para o ensino Educaçao Física escolar no capitalismo contemporâneo do ponto de vista hegemônico em que a centralidade nos processos educacionais é ocupada por disciplinas que possuem uma dimensao mais cognitiva, tais como Português e Matemática. Sendo assim, buscou-se apreender como a noçao de competência vem assumindo a centralidade na esfera educativa ao mesmo tempo em que coloca os saberes e o conhecimento em segundo plano. Além disto, identificar e compreender como a tendência colocada acima, sob a égide de dois documentos oficiais: Relatório Jacques Delors no plano internacional e Parâmetros Curriculares Nacionais no plano brasileiro repercutem nos saberes a serem trabalhados pela Educaçao Física no atual momento histórico foi centralmente importante. A partir dos elementos trabalhados, chegou-se ao entendimento de que a Educaçao Física imediatamente nao contribui para a formaçao exigida pela gestao de trabalho flexível, porém mediatamente sim, quando o trabalho pedagógico se volta, essencialmente, para a perspectiva de instrumentalizar os alunos para a resoluçao de problemas e a tomada de decisoes acertadas ao longo da vida

Lógica interna y Educación Física. Presentación de un proyecto de investigación

En esta ponencia realizaremos sucintamente la presentación de un proyecto de investigación que ha sido recientemente acreditado en la UNLP (Saraví, 2015). Dicha pesquisa está centrada en el estudio de la lógica interna (Parlebas, 1981, 2001), desde el marco teórico de la Praxiología Motriz. Al respecto, y desde esta perspectiva de análisis, nos interesa indagar en cómo los profesores de Educación Física de la ciudad de La Plata y Ensenada llevan adelante la enseñanza de diferentes prácticas corporales en instituciones educativas, clubes y/o espacios no formalizados. Asimismo buscamos conocer las características y rasgos de algunas de esas prácticas corporales -es decir, su lógica interna-, buscando las articulaciones con la Educación Física y tratando de indagar respecto a sí los profesores de esta disciplina conocen o no el concepto, y como lo utilizan. En este proyecto nos interesa particularmente explicar cómo opera el conocimiento de la lógica interna de esas prácticas en lo que concierne a su enseñanza y-o su gestión por parte de los docentes del área