bluuebunny/crossref_metadata_2025 huggingface dataset:
An evaluation of specialist health visitor early interventions with children's social care
Authors: Rees Karen , Shailer Shirley
Published: March 2020

This study aimed to evaluate the impact of specialist health visitor early interventions with families assessed as in need by children's social care, and appraise the potential for enhanced partnership working through professional co-location. An action research methodology aligned with the Plan, Do, Study, Act model recommended by NHS Improvement was used to enable a critical analysis of the process outcomes and the qualitative and quantitative data sets gathered during service implementation. This innovative service development co-located a specialist health visitor in a child in need children's social care team, who offered an intensive, tailor-made health visiting service to vulnerable families. Fifty per cent of the interventions were in the antenatal period and focused on promoting attachment and healthy attachment behaviours from parents. The evaluation demonstrated a de-escalation of child in need status, successful engagement of hard-to-reach families, the facilitation of attachment behaviours, improved parental mental health and enhanced parenting capacity and confidence. Professional partnership emerged alongside a shared philosophy of engagement.
Delayed prescribing of antibiotics for self-limiting respiratory tract infections in an urgent care out-of-hours setting
Authors: Dexter Justine , Mortimore Gerri
Published: March 2020

Long-term overuse of antibiotics and inappropriate prescribing has led to widespread development of antimicrobial resistance. The Department of Health and Social Care recently published a five-year national action plan to reduce antimicrobial resistance, with the aim of reducing inappropriate antibiotic prescribing. This is mirrored in the NHS Long Term Plan, which aims to reduce unintentional exposure through a combination of antibiotic stewardship and leadership at all levels. An acute respiratory tract infection is one of the most common presentations in primary care, with 16.7% of all prescriptions issued attributed to it. Therefore, out-of-hours prescribers contribute significantly to general antibiotic consumption. This article analyses the practice of delayed prescribing of antibiotics for the treatment of self-limiting respiratory tract infections in an out-of-hours service. The advantages and disadvantages associated with delayed prescribing, to safely treat patients whilst facilitating the reduction of antimicrobial resistance, are discussed. In addition, recommendations for future practice are offered. This article also focuses on the development of an advanced nurse practitioner, reflecting on the four pillars of advanced practice, which underpin advanced clinical practice and associated competencies.
Pixel super-resolved lens-free on-chip microscopy based on dual laterally shifting modulation
Authors: Zhang He , Wang Weibo , Liu Chenguang , Liu Jian
Published: March 2020

Achieving high spatial resolution over a wide field of view (FOV) is the goal of many imaging systems. In a traditional lens-based microscope, designing a complex objective with high numerical aperture (NA) to achieve this goal is a tough and challenging task. The lens-free wide-field imaging method based on phase retrieval provides a new way to bypass the trade-off between the spatial resolution and FOV of conventional microscopy. However, the typical lens-free microscopy usually requires mechanical devices with high precision and repeatability. In this paper, we report a robust and cost-effective pixel super-resolved lens-free imaging method based on dual laterally shifting modulation. A thin diffuser is inserted between the object and the image sensor to be used as the modulator. The diffuser and the object are transversely scanned at the same time to add diversities for phase retrieval and pixel super-resolution, respectively. In this way, the positional shifts of the diffuser and the object can be directly recovered with the registration algorithm, thus addressing the low stability and inaccuracy issues of translation stages. We also propose a pixel super-resolution phase-retrieval algorithm to recover the object and the unknown diffuser. We first use numerical simulations to evaluate the proposed scheme. Then, we validate this approach by imaging a resolution target and a pollen sample, thus achieving an FOV of

∼

30

mm
2

and a half-pitch resolution of 0.78 µm, which surpasses 2.14 times the theoretical Nyquist–Shannon sampling resolution limit. Finally, the 3D refocusing ability is also verified by imaging a thick mosquito sample.
Width determination for deep grooves based on a variable point spread function imaging model
Authors: You Xiaoyu , Wang Yuhang , Leach Richard , Gu Kang , Shi Yushu , Zhang Shu , Liu Jian
Published: March 2020

In three-dimensional confocal microscopy, two-dimensional width measurement can be significantly influenced by the groove height. The groove height not only results in deformation of the input light field due to the effect of edge occlusions, but also introduces a defocus error to the detection plane. This paper proposes a new, to the best of our knowledge, edge-setting method to determine groove width, which engineers the point spread function to correct for the groove edge obstruction effect and develops an edge obstruction imaging model (EOIM) based on the variable point spread function. This model gives a relationship between the groove height and the normalized intensity at the groove edge and can use this relationship to determine the groove edge position that would result from focusing at the groove’s lower surface. Experimental results show that an EOIM-based width determination method is more accurate than the traditional 1/4 edge-setting method. Compared to the 1/4 edge-setting method, the deviation from a reference width measured with traceable scanning electron microscopy is reduced by a factor of 2.1 with a 1.3 times smaller standard deviation.
Propagation of twisted EM Gaussian Schell-model array beams in anisotropic turbulence
Authors: Tang Miaomiao , Li Hehe , Li Xinzhong
Published: March 2020

The behavior of the twisted electomagnetic (EM) Gaussian Schell-model array beams in anisotropic random turbulence is investigated. An example illustrates that a twisted EM source can produce lattice-like patterns in degree of polarization with rotation or not, which depends on the setting of the initial twist phase. One also finds that the anisotropy of the medium leads to an anisotropic beam spreading, and we can effectively limit such turbulence-induced effects by optimizing the initial twist and source correlation widths. Moreover, after transmitting through the turbulence for sufficiently long distances, the intensity and coherence are mainly affected by turbulence statistics; however, for the case of polarization, the initial twist plays a dominant role in determining its distribution profile.
On-chip silicon shallowly etched TM0-to-TM1 mode-order converter with high conversion efficiency and low modal crosstalk
Authors: Xu Yin , Zhu Chenxi , Hu Xin , Dong Yue , Zhang Bo , Ni Yi
Published: March 2020

Ever-increasing capacity requirements of optical interconnects drive the emergence and fast development of mode-division-multiplexing (MDM) transmission on-chip, where efficient mode control and conversion components become indispensable. Here, we propose an on-chip silicon

TM
0

-

to

-

TM
1

mode-order converter by leveraging shallowly etched rectangular slots on the top surface of silicon nanowire. The mode conversion region consists of two rectangular slots on the same side of a silicon nanowire and a smaller one between them to realize the efficient mode-order conversion from input

TM
0

to output

TM
1

mode with the help of multimode interference and accumulated phase difference. By studying the etching pattern on the silicon nanowire in detail, we have achieved an on-chip

TM
0

-

to

-

TM
1

mode-order converter with a high conversion efficiency of 97.5% and low modal crosstalk

<

−

23

dB

in a conversion length of 11.8 µm; further, the insertion loss is only 0.29 dB at the wavelength of 1.55 µm. Moreover, the device working bandwidth and fabrication tolerance are also analyzed. Note that the proposed shallowly etched slots on the silicon nanowire can also be further developed to achieve the on-chip

TM
0

-

to

-

TM
2

mode-order conversion. With these characteristics, such a device could boost the development of MDM transmission on-chip with more TM-polarized mode channels.
Sub-acoustic resolution optical focusing through scattering using photoacoustic fluctuation guided wavefront shaping
Authors: Inzunza-Ibarra Marco A. , Premillieu Evolene , Grünsteidl Clemens , Piestun Rafael , Murray Todd W.
Published: March 2020

Focusing light through turbid media using wavefront shaping generally requires a noninvasive guide star to provide feedback on the focusing process. Here we report a photoacoustic guide star mechanism suitable for wavefront shaping through a scattering wall that is based on the fluctuations in the photoacoustic signals generated in a micro-vessel filled with flowing absorbers. The standard deviation of photoacoustic signals generated from random distributions of particles is dependent on the illumination volume and increases nonlinearly as the illumination volume is decreased. We harness this effect to guide wavefront shaping using the standard deviation of the photoacoustic response as the feedback signal. We further demonstrate sub-acoustic resolution optical focusing through a diffuser with a genetic algorithm optimization routine.
Image restoration for synthetic aperture systems with a non-blind deconvolution algorithm via a deep convolutional neural network
Authors: Hui Mei , Wu Yong , Li Weiqian , Liu Ming , Dong Liquan , Kong Lingqin , Zhao Yuejin
Published: March 2020

Optical synthetic aperture imaging systems, which consist of in-phase circular sub-mirrors, can greatly improve the spatial resolution of a space telescope. Due to the sub-mirrors’ dispersion and sparsity, the modulation transfer function is decreased significantly compared to a fully filled aperture system, which causes obvious blurring and loss of contrast in the collected image. Image restoration is the key to get the ideal clear image. In this paper, an appropriative non-blind deconvolution algorithm for image restoration of optical synthetic aperture systems is proposed. A synthetic aperture convolutional neural network (CNN) is trained as a denoiser prior to restoring the image. By improving the half-quadratic splitting algorithm, the image restoration process is divided into two subproblems: deconvolution and denoising. The CNN is able to remove noise in the gradient domain and the learned gradients are then used to guide the image deconvolution step. Compared with several conventional algorithms, scores of evaluation indexes of the proposed method are the highest. When the signal to noise ratio is 40 dB, the average peak signal to noise ratio is raised from 23.7 dB of the degraded images to 30.8 dB of the restored images. The structural similarity index of the results is increased from 0.78 to 0.93. Both quantitative and qualitative evaluations demonstrate that the proposed method is effective.
Coherent anti-Stokes Raman scattering imaging using silicon photomultipliers
Authors: Allen Christian Harry , Hansson Benjamin , Raiche-Tanner Olivia , Murugkar Sangeeta
Published: March 2020

Silicon photomultipliers (SiPMs) are an emerging solid-state alternative to photomultiplier tubes (PMTs) for low light detection, with similar gain but lower cost and lower operating voltage. We demonstrate coherent anti-Stokes Raman scattering (CARS) imaging in a side-by-side comparison of an uncooled SiPM with an uncooled multialkali PMT as well as a state-of-the-art cooled GaAsP PMT. We determine the optimum reverse-bias voltage for acquiring the best signal-to-noise ratio (SNR) for CARS imaging of lipids at

2850

c
m

−
1

. We find that despite the higher dark counts, the SNR of CARS images acquired with the uncooled SiPM biased at an optimum voltage is better than that of the multialkali PMT and close to that of the cooled GaAsP PMT (

∼

1.5

and

∼

0.8

times, respectively). This is due to the higher gain and lower excess noise factor related to the pulse height variability in the SiPM.
Measuring method for the line spread function of specular reflection
Authors: Inoue Shinichi , Tsumura Norimichi
Published: March 2020

Gloss is evaluated based on not only the intensity of reflected light but also the sharpness of the light source image. In this paper, we discuss the line spread function of specular reflection (SR-LSF). We developed a measurement apparatus for the SR-LSF based on the visual inspection of gloss. The measurement results of six types of samples with different glossiness values are shown. These samples were measured using the point spread function of specular reflection reported previously by the authors to verify the SR-LSF. It is shown that the SR-LSF can be measured easily and efficiently from an image recorded for visual inspection.
Indigenous agency through visual narratives in the Sierra Nevada de Santa Marta, Colombia
Authors: Triana Gallego Laura Ximena
Published: March 2020

This article focuses on the Wiwa community in the Sierra Nevada de Santa Marta, Colombia. This community has been reviving its traditional music as part of an effort to reconstruct its social network. Moreover, its members have recently embraced visual arts as a versatile medium in the context of the armed conflict. The local community of Siminke has started using visual tools not only to explicitly address their social and political issues on a regional level, but also to develop a new cultural space for self-expression and social (re)construction. Video and photography are being used here to preserve a cultural knowledge traditionally transmitted from generation to generation, a process disrupted by the armed conflict in the region. Methodology encompasses communicative methods such as interviews, visual analysis and photo-elicitation in order to understand and highlight the community’s internal perspective on the use of visual arts to reinforce their agency in pursuit of political goals.
Movimiento voices on campus: The newspapers of the Chicana/o student movement
Authors: Simón Salazar Harry L.
Published: March 2020

The political communication of the Chicana/o student movement of the 1960s and 1970s took place primarily through various forms of print media, with campus based student newspapers figuring prominently within that particular historical moment. At their peak, at least 48 Chicana/o student newspapers were produced on campuses throughout the country, marking these publications as both the principal and ideal format through which the flow of cultural and political information was channeled between movement publics, both on and off college campuses. Yet, the history of these publications has not been thoroughly documented, nor has the discursive legacy of this form of communicative resistance been fully examined. This paper provides a brief history of the emergence and significance of these student newspapers on campuses across the United States, focusing on how campus activists established this form of community media to help advocate on behalf of Chicana/o students and their broader publics.
‘We are all confident to speak’: Using radio as a tool of resettlement for young people of refugee background
Authors: Anderson Heather , Masocha Shepard , Sharma Neelu
Published: March 2020

Settlement presents a significant challenge for refugees compared to other migrants, given the forced, and often traumatic, nature of their resettlement, but despite this, many refugees arrive in Australia with the tools to positively face new challenges in their settlement and as a result have a very high chance of making a good life for themselves in Australia. This paper discusses the ways community media production can be utilised to investigate solutions to the resettlement challenges faced by young people of refugee background. It draws on findings from a pilot research project that involved young people with refugee experience in media and radio production, as well as broadcasting on an internet radio station at the University of South Australia. The findings suggest, preliminarily at least, that participation in community media can have a beneficial effect on a young person’s settlement experience, in line with perceptions of what constitutes ‘successful’ resettlement.
Decellularization of canine kidney for three-dimensional organ regeneration
Authors: Tajima Kazuki , Kuroda Kohei , Otaka Yuya , Kinoshita Rie , Kita Mizuki , Oyamada Toshifumi , Kanai Kazutaka
Published: March 2020

Background and Aim: Kidney regeneration is required for dogs with end-stage renal failure. Decellularization is one of the bioengineering techniques, which involves the removal of all tissue cells and cellular components and conservation of the extracellular matrix (ECM). Studies in rats have shown that decellularized kidney has regenerative potential; however, there are no reports on renal decellularization in dogs. Here, we showed the decellularization of the canine kidney.

Materials and Methods: The renal artery of the cadaveric canine kidney was cannulated and the whole kidney was frozen at –80°C. After completely thawing, it was perfused with physiological saline and sodium dodecyl sulfate (0.5%, 6 h) through the cannulated renal artery to achieve decellularization. To assess the efficiency of the decellularization protocol, histological and immunohistochemical analysis of decellularized kidney was performed.

Results: The results of hematoxylin and eosin (H and E) staining revealed that the decellularized canine kidney had no apparent cellular components. In addition, 4’,6-diamidino-2-phenylindole (DAPI) staining showed no visible nuclear components within the whole decellularized kidney. Therefore, both H and E and DAPI staining showed decellularization of the canine kidney. Our decellularization protocol also preserved the basement membrane of glomerulus, shown by periodic acid methenamine silver, periodic acid–Schiff, fibronectin, and collagen type IV stain.

Conclusion: Our decellularization protocol could eliminate cellular components and remaining native ECM structures of canine kidney. These results could promote further research into canine kidney regeneration, which may be the first small step to regenerate the canine kidney waiting for renal transplantation.
Diagnosis and Treatment of Duodenal Gastrointestinal Stromal Tumors
Authors: Du Haojie , Ning Longgui , Li Sha , Lou Xinhe , Chen Hongtan , Hu Fengling , Shan Guodong , Zhang Fenming , Xu Guoqiang
Published: March 2020

OBJECTIVES:

The diagnostic value of different noninvasive diagnostic modalities and the endoscopic ultrasound-guided fine-needle aspiration (EUS-FNA) reliability of duodenal gastrointestinal stromal tumors (GISTs) are ambiguous in the present studies.

METHODS:

Patients with a histopathological diagnosis of the primary duodenal GISTs between the years 2008 and 2018 were analyzed. Data on the treatment and clinicopathological features were recorded. Furthermore, the computed tomography (CT)/magnetic resonance imaging (MRI), EUS, and EUS-FNA results were collected and compared.

RESULTS:

A total of 142 patients were enrolled into the study. In all patients, the most common symptom was gastrointestinal bleeding (44.4%), followed by abdominal pain and bloating (27.5%). Duodenal GISTs were mostly located in the second duodenal portion (52.1%), followed by the first portion (19.0%). EUS had significantly higher sensitivity and positive predictive values than CT or MRI (P = 0.047 and P = 0.005, respectively). The EUS-FNA sensitivity of duodenal GISTs was also significantly higher than the conventional endoscopic biopsy (73.3% vs 33.3%, P = 0.006). A total of 131 patients underwent surgery, including limited resection or pancreaticoduodenectomy. The tumor size and postoperative complication rates were higher in patients who underwent pancreaticoduodenectomy (P = 0.001 and P < 0.001, respectively).

DISCUSSION:

The diagnostic value of EUS is significantly higher than that of CT and MRI for duodenal GISTs. The EUS-FNA can provide a histological diagnosis of duodenal GISTs in most cases.
Um diálogo entre epistemologia, educação e pedagogia teatral
Authors: Moura Fábio , Caregnato Caroline
Published: March 2020

Transmitir? Libertar? Provocar? Esse trabalho vislumbra relacionar três correntes epistemológicas (ligadas aos questionamentos da frase anterior) com suas derivações dentro da educação e, mais especificamente, com o ensino do Teatro. Cada pressuposto epistemológico será acompanhado dos seus respectivos desdobramentos pedagógicos, formando “pares” entre teorias que, em síntese, serão empirismo/pedagogia diretiva, inatismo/pedagogia não-diretiva, e construtivismo/pedagogia construtivista. O texto nos ajuda a compreender as possibilidades de relação dessas teorias com o ensino de Teatro, bem como suas adequações ou inadequações. O trabalho ainda tece críticas aos paradigmas empirista e inatista, bem como às pedagogias a eles relacionadas, defendendo a adoção de uma perspectiva construtivista como embasamento para a prática do professor de Teatro. A pesquisa se trata de uma revisão de literatura e conta com a fundamentação oferecida por autores da Epistemologia, da Educação e da Pedagogia Teatral.
Limites e exigências da colaboração artística horizontal
Authors: Tieppo Juliana Gedoz , Berselli Marcia
Published: March 2020

A partir de pesquisa teórico-prática, na qual são desenvolvidas práticas de teatro com pessoas com e sem experiência, o artigo aborda a importância da postura estabelecida entre as agentes nas práticas cênicas. A postura indica uma série de “preceitos”, ou seja, limites, exigências e liberdades, conscientes ou não, postos em operação nos processos criativos colaborativos, influenciando direta e significativamente o processo e os seus resultados. Para ampliar a reflexão, investiga-se também a definição de jogo e as suas respectivas exigências, traçando paralelos entre os requisitos necessários para que este possa ocorrer e como os mesmos são desenvolvidos nas oficinas com o grupo misto. Por fim, são analisadas as tarefas e ações desempenhadas pela encenadora, abordando as especificidades desta função neste processo colaborativo que não visa, a priori, um resultado.
Criação-performance partilhada em música
Authors: Araújo Ítalo Robert da Silva , Duarte Alexsander Jorge
Published: March 2020

Este trabalho dedica-se ao estudo de práticas performativas coletivas nas quais o som, com intenção musical, é usado como material para a criação em tempo real. Trata-se de um tipo de prática musical em grupo onde a performance e a criação são assumidas pelos agentes como indissociáveis e que estão conotadas com formas de adjetivação da música como "improvisada", "livre", "experimental" e/ou "espontânea". Estes modos de fazer musical, diluidores da dicotomia compositor/intérprete, oferece outros valores ao processo de performance musical como "musicar" sem materiais musicais pré-concebidos. A pesquisa parte de um trabalho etnográfico com dois grupos praticantes deste modelo, sendo um no Brasil e outro em Portugal, e o modelo teórico de análise utilizado assenta-se no conceito da imprevisibilidade e no Paradigma da Complexidade que problematiza os conceitos de "ordem" e "desordem".
Re-existência epistêmica
Authors: Bessa-Oliveira Marcos Antônio , Simão Leonardo Reinaltt
Published: March 2020

Diferença colonial, termo da inexistência subalterna do indivíduo de fronteira, um sujeito na “modernidade local”, “aquele” que não é parte, mas refugo do Poder autocentrado. A diferença é alternativa de re-existência dos corpos da exterioridade oprimidos por práticas/teorias (opressoras) hegemônicas geoistóricas. Logo, nossa discussão dar-se-á na ex-posição de corpos de gentes-sem-corpos (artísticos e identitários), por teorias descoloniais como alternativas epistêmicas contracartesianas, para expor corpos in-visíveis e gentes-com-corpos aos sistemas imperantes históricos e contemporâneos que os apagam em favor de não-representação na cultura e sociedade onde estão inseridos. A intenção da discussão é promover o argumento de que mesmo com-corpos invisíveis os sem-corpos re-existem.
Entre causos e cenas
Authors: Coelho Thiago Henrique Fernandes
Published: March 2020

O artigo tem como objetivo analisar o uso de narrativas orais para a construção de dramaturgias nas telenovelas de Benedito Ruy Barbosa, com recorte sobre a telenovela Paraíso (2009), na qual se estuda a representação de um contador de causos e como essas narrativas afetam a vida da população/personagens da referida telenovela. Também se faz relações com espetáculos teatrais que trazem narrativas orais para a construção da dramaturgia e da cena. Para tal abordam-se os espetáculos Campo Minado, direção de Lola Arias e Antígona, solo de Teresa Ralli. A partir da observação do uso de narrativas orais recolhidas em pesquisas de campo para a construção da dramaturgia, o pesquisador decide fazer o recorte para o presente artigo a partir de espetáculos que foram gerados a partir de narrativas orais.
Palhaço e Trickster
Authors: Pilatto Gonçalves Melaine
Published: March 2020

Neste artigo busco estender a visão de jogo para além da infância. O jogo aqui é visto como espaço para o encontro com o outro e consigo mesmo. Para isto busco compreensões na psicologia e nos estudos da performance. Ao trazer para o território teatral relaciono o jogar com o arquétipo do Trickster, a palhaçaria e o encontro promovido ao assistir o espectáculo Provisoriamente não cantaremos o amor, da Cia Traço.
Proust e Boltanski
Authors: D'Angelo Biagio
Published: March 2020

Com frequência Christian Boltanski cita Marcel Proust em suas entrevistas. E, como o próprio Proust, também Boltanski está à procura obsessiva de respostas sobre questões fundamentais da índole humana: como e por que descrever a morte? Ela pode ser aceita fora do parâmetro artístico? O que implica o distanciamento de coisas e seres queridos? Que mudança acontece na frente da ausência? Por que, para restituir vida (se assim pode-se dizer) é necessário um trabalho sobre a memória? A memória permite reconstituir o objeto de amor ou é uma ilusão estética? Porém, enquanto Proust tenta resolver a obsessão pela memória numa fulguração epifânica em que se reúne e se condensa todo o tempo perdido, em Boltanski manifesta-se a consciência de uma divisão entre o eu e a realidade e, especialmente, a impossibilidade de que um Ideal possa preencher o vazio criado pelo sujeito. Boltanski acredita ainda na função redentora (no sentido psicanalítico) da Arte. Os objetos e a memória a eles ligada reescrevem a “Recherche” proustiana em um arquivo antropológico que tenta lançar luz sobre zonas obscuras do Eu.
Entrevista com Gilvan Samico
Authors: Fonseca Fábio
Published: March 2020

Entrevista com o xilogravador pernambucano Gilvan José Meira Lins Samico. A entrevista aconteceu em setembro de 2010, no agradável sobrado próximo ao Mosteiro de São Bento, no centro de Olinda, onde ele vivia e mantinha seu ateliê, e onde fui recebido de maneira hospitaleira e calorosa por Samico e sua esposa Célida. Após um primeiro dia no qual houve uma conversa, a entrevista foi gravada nos dois dias seguintes. Fiz perguntas referentes à minha pesquisa, mas procurei deixá-lo falar espontaneamente. A entrevista apresenta um panorama, pelo próprio artista, sobre sua trajetória, desde o início no Ateliê Coletivo de Gravura da Sociedade de Arte Moderna do Recife, seu aprendizado com Lívio Abramo na Escola de Artesanato do Museu de Arte Moderna de São Paulo, e Oswaldo Goeldi na Escola Nacional de Belas Artes, no Rio de Janeiro, até o período no qual viveu em Madrid. O artista também fala sobre questões técnicas, suas relações com o mercado de arte e algumas lembranças da infância.
Movimento, dança e coreografia
Authors: Moraes Juliana
Published: March 2020

Nesse texto abordo aproximações entre meus trabalhos e os de minhas irmãs, a partir do convite para que nós três abríssemos o 1º Seminário de Pesquisa do Programa de Pós-Graduação em Artes Cênicas da Universidade Federal de Uberlândia (UFU), intitulado “Embrenhar a cena: corpos, poéticas, políticas”. Descrevo um pouco de nossa formação na infância, especialmente a preocupação de nossos pais com o ensino humanístico em aulas de diferentes linguagens artísticas, além da escola com pedagogia de Célestin Freinet na qual fizemos todo o ensino fundamental. Apresento as fases de minha carreira como bailarina e coreógrafa e reflito sobre os conceitos de corporeidade e coreografia, indicando artigos e livros nos quais abordo os temas com maior profundidade. Discorro sobre aspectos convergentes entre os trabalhos de minhas irmãs e o meu, e reflito sobre minha dificuldade em tecer relações mais profundas entre eles. Dentro do que minha própria opacidade em relação a mim mesma permite, busco escrever com clareza e honestidade a respeito de afetos e memórias construídos pela convivência com minhas duas irmãs.
PERFORMANCE CHALLENGES OF MEGA PROJECTS
Authors: Jergeas George , Lozon Jim
Published: March 2020

Large (mega) capital projects are experiencing cost overruns and schedule delays that are negatively affecting return on investment. Energy and industrial construction projects face unique challenges in project execution due to geography, climate, labour market characteristics, investment and other factors, both internal and external to the industry. Nonetheless, there is an urgent need for industry to address these challenges in order to improve the long-term success and sustainability of industry. A survey of industry leaders regarding their perception of where industry is at, areas for improvement and challenges they are facing. We asked them their opinion on what practices are good or bad, what needs to be improved and what lessons they may have learned regarding industry planning and execution processes, practices and procedures for large capital projects. The paper will present the findings from this industry survey. We also conducted a literature search of published material of industry practices on large capital projects. We analyzed the published material and survey responses to determine the current industry project performance (where are we at today?), factors that affect performance (what are we doing today?) and how can we improve performance (what can we do tomorrow?). We then present our recommendations. We encourage executives to expand their oversight of projects.
TABU SEARCH ALGORITHM FOR OPTIMIZING PILE FOUNDATION LAYOUT ON FOOTING OF RESIDENTIAL HOUSE
Authors: Hara Takahiro , Gan Buntara S.
Published: March 2020

In practice, positioning pile foundation on footing layout of a residential house is often based on empirical judgment and long working experiences of a designer. After the pile requirements calculated, some conditions like number of piles, spacing placement of all piles on the footing, and locations such as under columns, corner, or intersection have to be determined. Besides, the coincidence of shear and gravity centers is also another essential design consideration, which is often ignored in design practice. The present study is aimed at eliminating the horizontal torsion effects during the earthquakes occurrences by reducing the eccentricity distance between the centers of gravity and shear. The scope of present study excludes any foundation or structural related design and analysis. Recent advancement of computing capabilities of computers has made the structural analysis become a convenient tool at hand for designers. In this study, the Tabu Search algorithm was adopted as an optimization tool for pile placing on the footing of residential houses. Tabu Search algorithm was known as an efficient method for solving combinatorial optimization problems where it can find some quality solutions in relatively short running time without getting stuck in local optima. An example of footing layout design was demonstrated to show the effectiveness of the present study as a decision-making tool in design practice.
USE OF A NEW PHENOMENOLOGICAL MODEL TO CAPTURE THE NONLINEAR BEHAVIOR OF BRACING MEMBERS
Authors: Farahi Mojtaba , Erfani Saeed
Published: March 2020

This paper is a summary of an attempt to provide a phenomenological model in order to capture the nonlinear behavior of bracing members. The result obtained from modeling of a bracing system with the aid of the phenomenological model is compared with the result of a test to investigate the accuracy of the investigated model. Furthermore, static non-linear analyses are performed on an inverted V-braced subassembly using the phenomenological model as well as a convenient physical theory model. According to this study, the proposed phenomenological model is capable to favorably capture the behavior of a brace member under a cyclic loading. Hence, it can be used in analytical models of structural lateral bracing systems to assess accurately the nonlinear behavior of these systems.
STRESS FUNCTION OF SIMPLY SUPPORTED CONCRETE BEAM WITH A FRACTURE PROCESS ZONE UNDER UNIFORM LOAD
Authors: Duan Shujin , Guo Quanmin
Published: March 2020

Based on the weight integration to obtain the closed solution of cohesive crack problem, a method is proposed to obtain the stress function of a simply supported beam under uniform distributed forces in this paper. The key technique is to determine the weight of several solutions of elastic mechanics problems to satisfy the given crack traction within the cohesive crack surfaces and the boundary conditions. The error degree of the function to satisfy the boundary conditions mainly depends on the number and the location of the selected points. In the formed fracture process zone, there is both the finite magnitude of stress concentration and the smooth closed-crack opening displacement. The FE numerical simulation is also carried out; its results are in good agreement with the present theoretical calculation results.
NUMERICAL INVESTIGATION OF ELASTIC WAVE PROPAGATION IN FUNCTIONALLY GRADED MATERIALS
Authors: Lendrum Peter , Ye Lin , Yang Chunhui
Published: March 2020

Functionally graded materials (FGMs) are a new class of advanced engineering materials being developed and implemented in industry, which eliminate the material property discontinuities by grading material composition and continuously varying the compositions or volume fractions. Due to rapidly growing research interests in these materials, ways to monitor their performance and gather information on their properties are also becoming a focus for researchers. In this study, a guided wave-based non-destructive evaluation technique for the testing and monitoring of damage in functionally graded beams is developed. Firstly, functionally graded materials and the types of damage that can occur in them are reviewed and identified. Then the characteristics of guided waves propagating in functionally graded materials (FGMs) is determined analytically and numerically to optimize their application in a structural health monitoring (SHM) and non-destructive evaluation (NDE) system for the detection of damage. In numerical modelling and simulation, a finite element model is devised to simulate guided wave propagating in functionally graded beams made of functionally graded carbon fiber-phenolic nanocomposites (FGCN). The numerical results offer insights into the complicated and often erratic nature of guided waves that propagate in functionally graded materials as well as their interaction with damage.
GEOMETRICALLY NONLINEAR FINITE ELEMENT ANALYSIS OF ARBITRARY THIN PLATES
Authors: Panda Saleema , Barik Manoranjan
Published: March 2020

Many plate structures used especially in naval and aerospace applications undergo deflections that are not small in comparison to the thickness of the plate, but they are still small compared to other dimensions of the plate, so analysis must include the eﬀects of the large displacements on the structures. This report developed an elegant finite element formulation for analyzing the geometrically nonlinear static behavior of arbitrary-shaped thin plates. An arbitrary planform of a whole plate was mapped into a square domain where a cubic serendipity shape function represented the arbitrary geometry. An ACM plate-bending element along with the inplane deformations was considered for the displacement function. The nonlinear formulation was done in the total Lagrangian coordinate system using [N]-notation, and the nonlinear governing equations were solved by Newton Raphson iterative method. It was found that the element was capable of accommodating diﬀerent geometries just like isoparametric element. The eﬃcacy of the element was shown by comparing the deflections and stresses at critical points of the plates of square, skewed, and circular geometries with previously published results.
AIRCRAFT WING AND AERODYNAMIC ANALYSIS USING INTEGRATED MATLAB AND STAAD.Pro MODELS
Authors: Dean Christopher , Urgessa Girum , Azarbayejani Mohammad
Published: March 2020

Aircrafts have evolved significantly throughout the years, in large part to advances in technology. As technology grows, analytical models of aircrafts have become more accurate and play a more significant role in the design process. This paper examines the integration of commonly used mathematical and structural analysis software to conduct parametric studies on aircraft wing design and aerodynamics analysis for class project. The forces considered in this study include engine, fuel, and lift forces. The engine force is evaluated as a constant point load throughout the duration of the flight, while the fuel weight is changed throughout the flight as it was being consumed. The MATLAB algorithm is set up to analyze one fuel force input which is distributed evenly over the wing at a location where the fuel tank is located. The lift force is estimated using the Schrenk Approximation and the MATLAB algorithm is then used to distribute the lift force over the area of the wing. The methodology developed in this paper shows the potential of efficiently use non-aerodynamic software to produce a detailed preliminary structural analysis of an aircraft wing and the ability to use it in classroom projects.
CYCLIC TEST RESULTS OF BEAM-TO-COLUMN CONNECTION USING SHN490 STEEL
Authors: Kim So-Yeong , Shin Kyung Jae , Lee Swoo-Heon , Park Sung-Young , Chu Da-Som
Published: March 2020

This experimental study was conducted to evaluate the seismic performance of beam-to-column connection of mid/low-rise building. Four specimens with beam-to-column connections of SHN490 steel were prepared depending on joint types: (1) web welded & flange welded; (2) web welded & flange bolted; (3) web bolted & flange welded; and (4) web bolted & flange bolted. All of beam-to-column specimen size were used H-300 150 6.5 9. Relatively less stiff connections were made by using seat or web angles. Cyclic loading was applied at the tip of beam following AISC 360 load protocol. Applied load vs. rotation relationship for different connection are shown. Two connection with flange welded were governed by the panel zone strength but two connection with flange bolted were governed by the failure of seat angle with large rotation.
MEASUREMENT OF PERFORMANCE USING OBJECTIVE MATRIX
Authors: Priyanto Mifta
Published: March 2020

Some indicators as parameters to measure performance are commonly used by people. A measurement tool named Objective Matrix (OMAX) has some special advantage. It is more objective and representative to describe workers’ performance based on numerous objective indicators and it can quickly obtain their positions (in below, standard, or can achieve their targets). It can quickly compare comprehensive worker performance because it is represented in a unity block/diagram. The purpose of this paper is to find out the application of performance measurement by OMAX for its technicians in a ready mix concrete company. Application of measurement was performed in a ready mix concrete company located in Bandung, Indonesia. A measurement has been done based on their performance indicators covering consistency to take numerous test specimens (effective indicator) and unconformity of concrete quality (quality indicator). The value was based on actual performance score multiplied by the percentage of each indicator’s influence. Based on the research, the average score of drop quality were 16% and completeness of test specimens was 82 %. The best performance of workers to gather complete specimens was 98.3% and best performance for drop or rejects quality were 0%. The worst performance of drop or quality rejects was 24.14% and the worst performance of complete specimens was 74.69%. However, value was more than average, so their performance was sufficient.
RENOVATION OF CORRODED GIRDER END IN PLATE GIRDER BRIDGE WITH RESIN AND REBARS
Authors: Ogami Hiroshi , Fujii Katashi , Yamada Tomoyuki , Iwasaki Hastumi
Published: March 2020

There have been found a lot of corrosion damages recently in steel bridges aged for fifty or more years, especially in plate girder bridge, we can notice serious damages at girder ends involving supports. Then, the girder-end should be repaired adequately against the thickness loss caused by corrosion. This paper presents a repair method for corrosion damage at girder-end, in which rebars and shear connectors are fixed to the corroded member using with resin. In order to investigate the effect of recovered strength, we conducted axial compressive tests for six cruciform columns. One of the six specimens has no corrosion damage. The other five have the same unevenness imitated a corroded surface which is made artificially by drilling, for the purpose of grasping the quantitative effect by the repair method. During the test, ultimate strength and post buckling behavior of the cruciform columns are also investigated as well as recover effects. It is concluded from test results that this repair method can enhance the axial remaining strength sufficiently, beyond the ultimate strength of the non-corroded specimen because the buckling length become shorter by repaired resin thickness than the column length which is equal to the buckling length in the non-corroded case.
REFURBISHMENT OF THE MASONRY ARCH ON MERXEM STREET BRIDGE
Authors: Outtier Amelie , De Pauw Bart , Van Bogaert Philippe , De Backer Hans
Published: March 2020

Due to the widening of the Albert Canal, several railway bridges were replaced by longer spans on new embankments. With a change in overall length profile, two railway bridges needed refurbishment. The Merxem Street Bridge, a classic masonry arch bridge, had a new tubular arch bridge built adjacent. Due to time, increased traffic, ballast, loads, and volumes on the bridge since the early 1900s, it was strengthened because of the bridge’s historical value and structural soundness. A new concrete deck was installed on top of the masonry arch ensuring that the higher live as well as dead loads would be spread over the arch length. This new deck was a combination of precast concrete elements with on-site concrete construction. This research focuses on this combined concrete design and its realization. The ultimate load-carrying capacity of both the existing and strengthened situation was verified using rigid block analysis. Critical failure modes were checked and the strengthening avoided the most precarious modes.
EXPERIMENTAL STUDY FOR THE WETTING TIME OF WEATHERING STEEL PLATE WITH CHAMFERED EDGES
Authors: Kaita Tatsumasa , Goto Satoshi , Yamanaka Takahiro , Sakka Mio
Published: March 2020

In this study, the wetting time measurement of five weathering plates, which have three types of chamfered edges, were carried out for clarifying the superiority of drainage performance. The wetting state on steel surface was judged by measuring the electrical resistance at a center point near the plate edge. The inclination of all specimens was set to 2 % in this wetting time measurement. The protective rust (about 70 μm thickness) was generated all over the surfaces of specimens by the outdoor exposure test. From the experimental results, the linear-chamfered edges could shorten the average wetting time by 14~28 % than the non-chamfered edge, because the water-drops attached to the edges drip more easily. On upper surface, the drainage performance will be significantly influenced by the cutting size of chamfered edges.
DYNAMIC ANALYSIS OF BRIDGES WITH PLASTIC HINGES UNDER EXTREME EARTHQUAKES
Authors: Lee T. Y. , Chung K. J.
Published: March 2020

This study is aimed to develop the model of fiber element in the Vector Form Intrinsic Finite Element (VFIFE) to analyze the plastic hinges of reinforced-concrete columns for bridges subjected to extreme earthquakes. The VFIFE, a new computational method, is adopted in this study because of the superior in managing the engineering problems with material nonlinearity, discontinuity, large deformation and arbitrary rigid body motions of deformable bodies. In the past study, a plastic hinge is idealized as a bilinear elastoplastic model with a fracture moment. In order to analyze the realistic behavior of the plastic hinge, especially in ultimate state, the fiber element is developed to simulate the plastic hinge by using stress-strain relations in cover concrete, core concrete and steel fibers. The developed fiber element is verified to be feasible and accurate through numerical simulation. A three-span-continuous isolated bridge is analyzed to investigate the function of the columns and unseating prevention devices and to predict the collapse situation of the whole bridge. In addition, the analysis results are compared between the fiber element and bilinear elastoplastic element.
EFFECTS OF VERTICAL SLOTTED HOLE ON COLD FORMED STEEL Z-SHAPE LAPPED PURLINS
Authors: Xu L. , Liu J. , Fox S. , Liu Y.
Published: March 2020

Lapped joints of cold-formed steel Z-shaped purlins are extensively used in metal building roof construction to create multi-span purlin systems. Conventionally, round holes are used in the lapped purlin connections. With the advantage of providing extra installation tolerance, vertical slotted holes are widely used in the lapped joints of cold-formed steel Z-shaped purlin systems to simplify and expedite the erection of multi-span purlin roof systems. However, the current design practice is based on the research for the lapped connections with round holes. Almost no research has been conducted to investigate effects of vertical holes on the flexural behaviour of cold-formed steel Z-shaped purlins. To investigate the effects of vertical slotted holes on the structural behaviour of lapped cold-formed steel Z-shaped purlins, tests were performed on the lapped purlins with different lap lengths, purlin depths, thicknesses and spans. The results show that the flexural strength and stiffness of the lapped purlins with vertical slotted holes are primarily influenced by three parameters, i.e., the ratio of lap length to purlin depth, the ratio of lap length to purlin thickness, and the ratio of purlin depth to purlin thickness. Based on the test results, design recommendations are proposed for designing lapped cold-formed steel Z-shaped purlins with vertical slotted holes.