bluuebunny/crossref_metadata_2025 huggingface dataset:
Influência da ancoragem na resistência à flexão de vigas reforçadas com mantas de PRFC
Authors: De Pina Ferreira Mauricio , Honorato de Oliveira Marcos , Lima Neto Aarão Ferreira , Sales Tapajós Luamim , Nascimento Alex , Caires Freire Marília
Published: December 2018

PBuscando avaliar a influência da ancoragem na resistência à flexão de vigas reforçadas com mantas de Polímero Reforçado com Fibra de Carbono (PRFC), foram analisados os resultados experimentais de 126 ensaios presentes na literatura e de uma série inédita, ensaiada pelos autores, com 4 vigas de concreto armado. São avaliados os parâmetros que afetam o desempenho e a resistência das vigas, e discutidos os critérios de dimensionamento do fib Bulletin 14 (2001) e ACI 440-2R (2008). Observou-se que, mesmo com dispositivos auxiliares na ancoragem do PRFC, falhas prematuras são possíveis, e também que ambas as recomendações teóricas conduzem a estimativas a favor da segurança, porém excessivamente conservadoras nos casos onde a ancoragem da manta de PRFC é feita adequadamente.
Avaliação da resistência mecânica de vigas em concreto armado após o incêndio
Authors: Pereira Renato Guilherme , Pires Tiago Ancelmo Carvalho , Duarte Dayse , Rêgo Silva José Jéferson
Published: December 2018

Este artigo apresenta um programa experimental para determinar a resistência residual de vigas em concreto armado bi-apoiadas sujeitas à flexão pura após incêndios. Também é apresentado um modelo tridimensional, não linear, em elementos finitos capaz de prever o comportamento térmico e mecânico (residual) deste tipo de elemento estrutural. As vigas não apresentaram redução significativa na sua resistência residual até 120 min. de exposição ao fogo, caracterizando um bom desempenho após incêndio. O modelo numérico mostrou-se preciso na previsão das temperaturas e da carga de ruptura residual quando comparado aos resultados experimentais.
Muslim Puritan Dan Muslim Moderat (Pembacaan Terhadap Kedudukan Perempuan)
Authors: Munawir Munawir
Published: December 2018

Puritans Muslim -with a spirit of the Quran and Sunnah- made Islam in the time of Prophet Sawas an authentic and final model. Using a textual approach, they understand Islam rigidly so that all the features of Islam mixed with local locality (non-Arabic) are considered to be viruses and must be sterilized to get pure. In contrast to moderate Muslims, though both of them are in line with the Qur'an and Sunnah, they are not using a textual approach but contextualist or even philosophical. Islam at the time of the Prophet saw was viewed by moderate Muslims as a historic and dialectical Islam with socio-cultural society, because they understand Islam flexibly. With different approaches in the return movement in the Quran and Sunnah, the two Islamic epistemes are different, as seen in the issue of women's position. In the history, Puritan Muslims often use violence in the name of religion to defend and spread its ideology. The above study is based on historical study with descriptive-qualitative approach.
Pesantren: Antara Transformasi Sosial Dan Upaya Kebangkitan Intelektualisme Islam
Authors: Chaer Moh Toriqul
Published: December 2018

Pesantren as a representation of a typical Islamic education Indonesia has a significant contribution in the intellectual life of the nation. Stigmatization of the pesantren education as a classic conservative and old-fangled, seem to need to be re-examined.. Learn how social function of religious schools is still required with considering repeated the role and dynamics of the boarding school in the community. Dynamics of modernity imposes a fundamental function of the pesantren which eventually resulted in the emergence of the reduction of cultural identity on boarding. The problem is the consequences and implications logical, when pesantren connected with modernity. This article studies focused their efforts on Pesantren maintain themselves as Islamic religious institutions to strengthen the tradition and transformed in the modern era. In the capacity of the boarding school as educational institutions and social culture. It will play a fundamental role in the function of society Indonesia in the middle of modernity.
Perubahan Tatanan Hijab Mahasiswi Muslimah: Analisa Motif Dan Ideologi Keislaman
Authors: Wahyuningsih Sri
Published: December 2018

This article mainly describes the changes of hijab and fashion shown females students regarding to their motives and Islamic ideology. This study used a qualitative method applying a social learning theory of Albert Bandura. In-depth interviews and documentation used to collect the data. The results showed that the students had a process of imitation in terms of hijab and fashion worn by others. They observed hijab and fashion (attention). The styles of hijab and fashion they noticed is then stored (retention). Then, they began to wear the hijab and clothing with new models (reproduction). Their new appearance is a form of motivation. Some of them argued that Islamic values and faith are the affairs of every person with God and a fashionable style is a woman's choice. Meanwhile, other students thought that both fashionable style and essential functions aspects of hijab should be integrated well.
Argumentasi Tauhidik Dalam Perilaku Sosial-Agama
Authors: Hadining Hasanain Haikal
Published: December 2018

Humans need religion as a hand of living. Islam is a religion of the majority that adopted of the society in Indonesia. Islam increasingly faces heavy challenges, an example are materialism and the doctrine of terrorism which many interesting sympathy from lay of people. Threfore the knowledge of the true of tawhid understanding needs to be communicated to the public, in order that the society can be strong to grip of life. Th people with knowledge of true tawheed can reach safety in the world of life and in the hereaftr. Tawheed is the subject of faith, God should not be like a creature (mujassimah or musyabbihah), and the existence of God is without place and without direction. Th research method in this article is descriptive qualitative usting library research approach supported by historical and sociological studies.
Membumikan Teologi Transformatif Penyetaraan Sosial Umat
Authors: Robikah Siti
Published: December 2018

This article describes the renewal of Moeslim's Islamic thinking about transformative theology, and aims to introduce and revitalize Islamic thought that is almost forgotten. Islam as a foundation for the life of Muslims should not only prioritize the hablum min Allah and forget the hablum min an-nas, both must be balanced. This research is a reseacrh library, and the work of Moeslim Abdurrahman as the primary data. According to Moeslim worship in particular 'must be balanced with social care. This has become Moeslim's anxiety when he sees the reality of Muslims today being colonized by the flow of modernization which has led to the development of western capitalism, thus impacting increasing poverty and ignorance in Indonesia. This study yields findings that in transformative theology Moeslim offers reforms in the field of economics and education through community empowerment with job creation and the realization of a new model of pesantren which gives birth to Muslim thinkers based on liberation of oppression as the main objective of transformative theology.
Religion in Television: Mediated Religious "Kuliah Subuh” Program in Indonesia
Authors: Taufiqurrohim Taufiqurrohim
Published: December 2018

In this contemporary life, television becomes an effective media of the da’wa or proliferation. The flourishing some of Islamic programs also effects to the order of the religious public life in Indonesian society. Using the descriptive analytical research, this essay investigates the process of religious proliferation program who become popular in society. It is started from the objective of some television channel to show “kuliah subuh”, a religious speech from an expert people that understand about Islamic religion or ustad after the dawn. Then the writer tries to find an effect of the media especially television to the audiences from the message of the program and their daily life expressions. Finally, “kuliah subuh” appears as a mediated religion which produces certain effects on religion in order to adapt it to television formats. It make the birth of transformations and paradoxes within the institutional model of religiosity.
Studi Kritis atas Transmisi dan Otoritas Keagamaan di Media Sosial
Authors: Muhtador Moh
Published: December 2018

The development of social media raises a problem related to social change authorities such as thinking paradigms, social behavior, and religious models. This article aims to criticize the development of religious teachings found on social media. The method used is descriptive-critical by using the authority theory Abou El Fadl to assess and analyze the development of religious models in social media while transmission theory to find the authenticity of religious teachings. The result is known that the development of religious models on social media does not display scientific transmission. Religious developments that exist in social media tend to be textual-dogmatic in style, thus impacting on a stagnant religious attitude. The importance of this article is to provide a critical review of the development of religious knowledge found on social media. The critical study lies in the aspect of substance (material) or aspects of transmission (narrator). The authenticity and the development of religious teachings on social media can be known.
Anais III CIOPB - III Congresso Interdisciplinar de Odontologia da Paraíba
Authors: Silva Wallid Carlos Nacimento da
Published: December 2018

Prezados Congressistas, É com grande satisfação que os discentes do 9º período da Universidade Federal de Campina Grande realizou, durante os dias 08, 09 e 10 de novembro de 2018, o III Congresso Interdisciplinar de Odontologia da Paraíba (III CIOPB). Preestabelecemos uma grade científica na qual introduzimos palestrantes mestres e doutores, nomes de referência em trabalho de qualidade das mais diversas áreas de concentração da Odontologia, com o objetivo de atualizar os conhecimentos clínico-científicos e divulgar trabalhos que estão em alta. A cada nova edição do congresso buscamos novos temas que despertem a curiosidade dos congressistas a aprenderem sobre novos assuntos, compartilhando experiências sobre diversos conteúdos, estimulando o desenvolvimento da área.O planejamento da programação científica contou com palestras nas mais diversas áreas da odontologia, ministradas por palestrantes reconhecidos e renomados, que desejaram compartilhar com os congressistas temas importantes e modernos, além de novas técnicas. Os congressistas contaram, ainda, com a oportunidade de apresentar e assistir às exposições de diversos trabalhos científicos, na modalidade de painel na forma de pesquisa científica, relato de caso clínico, revisão de literatura e relato de experiência. Outrossim, o evento promoveu minicursos que enriqueceram os conhecimentos dos participantes. O evento também contou com uma programação social visando uma maior interação entre congressistas e palestrantes. Portanto, o evento foi um sucesso e esperamos a colaboração de todos para o IV CIOPB. Aproveito a oportunidade para agradecer o periódico Archieves of Health Intvestigation pela honrosa oportunidade em publicar os resumos dos trabalhos apresentados no evento. Meus sinceros agradecimentos.Wallid Carlos Nacimento da Silva - Presidente do III CIOPB
Translation in the language classroom: Multilingualism, diversity, collaboration
Authors: Panzarella Gioia , Sinibaldi Caterina
Published: December 2018

The aim of this article is to discuss the ways in which translation can be used to foster multilingual competence and intercultural awareness in the foreign language classroom. While translation was described as a vital skill for foreign language learners in a European Commission study (2013), it has also been criticised for hindering the objectives of communicative approaches. This article draws on a number of examples and strategies to examine the potential of translation and, ultimately, to demonstrate how translation can play a key role in language teaching. The translation activities that have been selected place emphasis on collaboration and are designed to challenge cultural stereotypes, as well as monolingual and monocultural assumptions. Translation is presented both as a skill in itself and as a versatile pedagogical tool to improve learners’ confidence, critical thinking, and intercultural competence, both in curricular and in extra-curricular settings.
“Siento que siempre tengo que regresar al inglés”: Embracing a translanguaging stance in a Hispanic-serving institution
Authors: Musanti Sandra I. , Cavazos Alyssa G.
Published: December 2018

This chapter centers on our reflections and pedagogical moves as two bilingual educators at a Hispanic-Serving Institution on the borderland region of South Texas, a predominantly bilingual and bicultural community. Specifically, the chapter documents how we embrace a translanguaging pedagogical stance. Translanguaging practices are identity markers and represent the complex ways bilinguals use their linguistic repertoire to communicate across contexts and to negotiate social identities (García & Li Wei, 2014; Martinez-Roldán, 2015). Drawing on García, Johnson, and Seltzer’s (2017) conceptualization of a translanguaging “corriente,” we describe our translanguaging stance and moves as we, respectively, design and teach two undergraduate courses: an upper-level undergraduate Foundations of Bilingual Education course and an undergraduate Rhetoric and Composition I course. We identify tensions, as well as commonalities and differences in our experience enacting translanguaging pedagogies and assignments in two different disciplinary areas. We also present two students’ reflections and assignments to illustrate the outcomes of our translanguaging pedagogies.
A holistic model for multilingualism in education
Authors: Duarte Joana , Günther-van der Meij Mirjam
Published: December 2018

This paper presents a holistic model for multilingualism in education (Duarte, 2017), which combines different approaches to teaching and knowledge and places them in a continuum—from the acknowledgement of different languages to their actual use as a language of instruction. The model addresses attitudes, knowledge, and skills related to the multilingualism of both teachers and students (Herzog-Punzenberger, Le Pichon-Vorstman, & Siarova, 2017) and is suitable for different school types and students (i.e., for both minority and migrant students). The model is tested in the northern Netherlands in a multilingual education project that combines different approaches to multilingual education for both migrant and minority learners. Through design-based interventions, teachers and researchers collaboratively develop multilingual activities in a bottom-up approach (i.e., based on questions from the schools involved). Some preliminary results from the project are presented, and the model’s contribution to research on multilingual education is discussed.
Pockets of hope: Cases of linguistic flexibility in the classroom
Authors: Durán Leah , Henderson Kathryn I.
Published: December 2018

This study adds to the small but growing body of work demonstrating the instructional potential of linguistic flexibility and hybridity to support student learning. Our findings from two elementary classrooms illustrate the way that translanguaging pedagogy contributes to students’ understanding of content-area material as well as their mastery of language arts skills. Student language practices described as reflecting academic language, language variation, and code-switching represent three domains that are often talked about separately. We consider the ways both focal teachers created spaces for students to draw on linguistic resources across these domains. In our discussion of the findings and their implications, we attempt to unite these perspectives in order to extend current understandings about translanguaging pedagogy and highlight ways to value and employ a broader spectrum of language practices for academic purposes.
Recensione: Mazzaferro, Gerardo (Ed.). (2018). Translanguaging as everyday practice. Cham, Switzerland: Springer.
Authors: Carbonara Valentina
Published: December 2018

In questo contributo viene proposta la recensione del testo Translanguaging as Everyday Practice, curato da Gerardo Mazzaferro (Università degli Studi di Torino) e pubblicato nel 2018 dall’editore Springer. Il libro propone 14 studi che, attraverso approcci metodologici diversi, offrono una profonda analisi del concetto di translanguaging in molteplici contesti. Questa nozione viene esaminata, per esempio, nell’intersezione con fenomeni più ampi quali la costruzione identitaria nelle comunità immigrate o minoritarie, il mantenimento e l’erosione linguistica, l’agency dei singoli soggetti nei contesti educativi. In questa recensione, dopo una breve introduzione sugli obiettivi del testo e sul tipo di audience a cui si rivolge, vengono presentati i contenuti dei singoli capitoli e infine si mettono in luce gli aspetti rilevanti e di pregio del testo, accanto ad alcune lievi criticità che non sottraggono valore a questo ottimo libro.
Multi-Criteria Land Suitability Analysis for Plantation in Upper Mula and Pravara Basin: Remote Sensing and GIS Approach
Authors: Zolekar Rajendra , Bhagat Vijay
Published: December 2018

Assessment of land suitability potentials is an important step to detect the environmental limit for sustainable land management (SLM). Land suitability analysis (LSA) is more suitable, beneficial and environmentally acceptable for SLM. It deals with the assessment of land performances for the specific use like agriculture, plantation, etc. The main objective of the present study was to determine the suitable areas for plantation in the Upper Mula and Pravara Basin. GIS based Analytic Hierarchy Process (AHP) was used to analyze land suitability for plantation. Criterion like slope, LULC, depth, texture, moisture, SOC, MWHC, pH, EC and primary nutrients were used. Pairwise comparison matrix was used for calculation of weights for criterion and scores were assigned to sub-criterion using field work, experts’ opinions and literature review. Weighted overlay analysis was used for final output raster map. Then cell values of raster map were divided into four classes i.e. 9, 7, 4 and 1. Finally, these classes have reclassified into four suitability levels according to FAO. About 5% of reviewed land is highly suitable, 23% moderately suitable, 14% marginally suitable and 58% not suitable for plantation in the region.
The influence of heart coherence on synchronization between human heart rate variability and geomagnetic activity
Authors: McCraty Rollin , Atkinson Mike , Timofejeva Inga , Joffe Roza , Vainoras Alfonsas , Landauskas Mantas , Alabdulgader A. Abdullah , Ragulskis Minvydas
Published: December 2018

Results of a study on the effect of the Heart Lock-In meditation technique on the synchronization between heart rate variability and local magnetic field activity is presented in this paper. A technique based on the near-optimal chaotic attractor embedding was applied in order to evaluate the geometrical synchronization between analyzed time series. The results demonstrate that Heart Lock-In technique had a strong influence on the relationship between cardiac and geomagnetic activity.
Experimental investigations on permeability and damage mechanism of cemented soil in acidic and alkali environments
Authors: Sili Chen , Rui Hou , Jingyu Zhang , Junxiang Wang
Published: December 2018

Cemented soil impermeable projects directly or indirectly contact an underground corrosive environment in most cases, which could cause reduced impermeability and malfunction of the cemented soil. Laboratory simulation permeability tests of cemented soil were conducted under different cement ratios in acidic and alkali environments. The variation in the permeability coefficient of the cemented soil was studied under different curing times, pH, and cement contents. Using scanning electron microscopy (SEM) and energy spectrum analysis, the permeability of cemented soil in acidic and alkali environments was studied at the microstructure level. The test results show that an acidic environment has a major effect on the permeability coefficient of cemented soil with a low cement content, and a greater cement content offers increased resistance to acid erosion. In an alkali environment of pH 9-13, the permeability coefficient of the cemented soil gradually decreases as the curing time increases. The research results provide technical parameters for the impermeability and durability design and application of cemented soil in impermeable projects, which has important engineering implications.
A novel bridged-insert cascaded five level inverter topology
Authors: Arumugam Senthilkumar , Shanmugam Sathish Kumar , Loganathan Anbarasu , Palanirajan Gowtham , Ramachandran Meenakumari
Published: December 2018

Inverters are basically power electronics devices that are used to convert DC power to AC at a required frequency and voltage level. Their main application area in real-time is in high voltage and high-power applications in which the switching stress as well as total harmonic distortion must be low. Multilevel inverter technology has been emerging in recent times, as a very important substitute in for high-power medium-voltage energy governed devices. Multi-level inverters also have a major role in interconnected grid systems used nowadays. There are several major topologies of multilevel inverters that exist in literature: Diode clamped (DMLI) (aka neutral-point clamped), and Flying capacitor multilevel inverter (FCMLI) (aka capacitor-clamped) [1] and Cascaded H-bridges converter (CMLI) (i.e., cascaded multicell using separate dc sources). This paper discusses the principal benefits and drawbacks of increasing the number of levels of the inverter and how it has an effect on the efficiency and losses in the MLI architecture and how this difficulty as well as the overall performance of the systems can be improved using a novel Bridged-Cascaded H-bridge MLI topology. There are n-level inverter topologies possible. The paper proposes a novel bridged-insert cascaded MLI topology. The focus of the paper is on 5-level inverter topologies. The simulation has been carried out using MATLAB/Simulink.
Masonry vaults strengthened with a GFRP reinforced mortar coating: evaluation of the resisting peak ground acceleration
Authors: Gattesco Natalino , Boem Ingrid
Published: December 2018

The reinforcement of existing masonry vaults against seismic actions is an extremely timing issue and it has already involved many researchers in experimental testing and numerical modelling. However, up to now, the results of the research have been expressed and compared in terms of load-displacement capacity curves. But the designers, in the practice, need to assess the resisting peak ground acceleration of the vault (PGA), so to compare it with the seismic demand. In the paper, a strategy to evaluate this parameter, based on the modified Capacity Spectrum Method and accounting for the level of the vault in the building is proposed. The procedure is applied to a case study of a masonry building with barrel vaults, comparing the performances of plain vaults and vaults strengthened with a GFRP (Glass Fiber Reinforced Polymer) reinforced mortar coating. The results evidenced significant improvements in terms of PGA after the reinforcement, attaining to values from 3.1 to 3.3 times that of the unreinforced vault.
Numerical analysis of monitoring of plastic hinge formation in frames under seismic excitations
Authors: Huras Łukasz , Bońkowski Piotr , Nalepka Marek , Kokot Seweryn , Zembaty Zbigniew
Published: December 2018

Preliminary, numerical analyses of a novel Structural Health Monitoring (SHM) technique are reported. Based on recent developments of new rotation rate (rotation velocity) sensing devices, it is proposed to use the rotational sensors to measure the rotational difference of structural members to indicate plastic hinge development at the early stage. Respective difference between rotations of two adjacent corner nodes during seismic excitation is used to indicate and possibly quantify plastic hinge formation during seismic response of a moment resisting frame. The preliminary numerical analysis leads to a positive conclusion for the application of the rotation rate sensors in ‘on-line’ monitoring of moment resisting frames subjected to strong, damaging seismic ground motions.
Proposition of stiffness reduction in analysis of clay brick masonry under cyclic/seismic loads
Authors: Kubica Jan
Published: December 2018

Analysis of masonry buildings situated on seismic or mining activity terrains as well as subjected to dynamic human-induced vibrations and influences should base on the appropriated mechanical properties of masonry. There main parameters describing bending and shear stiffness’s of masonry shear walls are modulus of elasticity as well as shear modulus. Values of these parameters under seismic or cyclic loading are rapidly coming down due to the inelastic behaviour of the masonry. The problem of degradation of modulus of elasticity E as well as shear modulus G is presented and discussed based on the tests results of three types of clay brick masonry wall specimens subjected to compressive cyclic loads and some specimens under cyclic horizontally and vertical shearing (in one cycle) carried out at the Department of Structural Engineering of the Silesian University of Technology in Gliwice as well as results obtained by other researchers and available at the technical publications. As result there is proposed to determine the value of modulus of elasticity as 40 % of calculated with accordance with Eurocode 6 [1]. In case of shear modulus it is suggested to determine the G values as 20 % of initial values of modulus of elasticity, that is mean 50 % less than recommended in current version of Eurocode 6 [1] and perfectly correct with requirements given in Eurocode 8 [2].
Experimental study of the effect of vertical acceleration component on the slope stability
Authors: Korzec Aleksandra , Jankowski Robert
Published: December 2018

The paper deals with the stability of earth dams subjected to seismic and paraseismic excitations occurring in the close distance to the dam. The Newmark’s stability approach, classified as a simplified dynamic method, has been extended for two directional dynamic loading case and the evolution of the friction coefficient. The paper is focused on the experimental verification of the proposed method for harmonic and cyclic excitations generated by a simple oscillating device as well as by one-directional shaking table. Main assumptions of the proposed method have been proved and the effect of the vertical acceleration on the stability of the dam has been demonstrated. In the experiments conducted under cyclic loading, the impact of the vertical acceleration on the permanent displacement of the block was equal to 57 %. However, in general, the exact magnitude of this impact depends on many factors, such as the vertical to horizontal peak ground acceleration ratio or frequency range of the vertical component of the earthquake.
Analysis of temporary steel grandstand with different bracing systems exposed to crowd load
Authors: Lasowicz Natalia , Falborski Tomasz , Jankowski Robert
Published: December 2018

Grandstands are structures which are regularly subjected to dynamic loads generated by crowd motions. It is a dangerous situation when spectators induce rhythmic jumping, dancing, stamping, etc. If the synchronized movement of spectators excites a natural frequency of the structure, resonant response might occur. To avoid such situations, temporary steel grandstands are commonly strengthened using additional elements that create bracing system which is selected depending on the size of the structure, type of the event, acting load, etc. It was proved that not only the use but also the arrangement of such structural members is crucial for the dynamic structural resistance. The aim of the present study is to determine the most effective arrangement of bracing system for a typical example of the temporary steel grandstand which is exposed to dynamic load induced by spectators. Three different arrangements of bracing systems have been analysed using five criteria recommended in the literature. The results of the study clearly show that the dynamic parameters of the grandstand are substantially different for various types of bracing systems. The largest improvement in the structural behaviour has been obtained for the grandstand equipped with the bracing system satisfying all proposed criteria. The peak accelerations for this case have been found to be nearly twice as low as for structures with other bracing arrangements. The application of such a system for the grandstand which is exposed to human-induced vibrations allows for safe use of the structure as well as improves comfort of spectators.
Development and analysis of a new technology of freight cars modernization
Authors: Buchacz Andrzej , Baier Andrzej , Płaczek Marek , Herbuś Krzysztof , Ociepka Piotr , Majzner Michał
Published: December 2018

Paper contains a report of the part of works conducted in the research and development project concerned with a modernization of freight wagons during their periodic repair. The aim of this research was to obtain better exploitation conditions of freight cars. Two elements of those works are presented: a computer aided analysis of the freight car’s CAD model and results and analysis of the real object elements’ vibrations during exploitation. The aim of numerical analysis was to determine the maximal permitted speed at which the car does not go off the rails. These tests were performed using the “Motion Simulation” module of the software of the CAD/CAE/CAM class Siemens PLM NX. The real freight car’s elements vibration were measured and analysed in order to verify if it is possible to create a mechatronic approach for technical condition analysis of modernized freight cars during their exploitation based on their dynamic response as well as to validate the CAD model of the considered freight car.
An improved extreme-point symmetric mode decomposition method and its application to rolling bearing fault diagnosis
Authors: Xia Ping , Xu Hua , Lei Mohan , Ma Zaichao
Published: December 2018

HHT (Hilbert-Huang Transform) which consist of EMD (Empirical Mode Decomposition) and HT (Hilbert Transform) now is the most widely used time-frequency analysis technique for rolling element bearing fault diagnosis, however, its fault characteristic information extraction accuracy is usually limited due to the problem of mode mixing in EMD. ESMD (Extreme-point symmetric mode decomposition) is a novel development of HHT which is promising to alleviate this limitation and it has been applied to some fields successfully, but its application for rolling bearing fault diagnosis has rarely been seen in the literature. In this paper, ESMD is applied to extract the bearing fault characteristics for rolling bearing fault detection, and the results proved that ESMD can have a better fault diagnose effect than EMD and HT. What’s more, for further improving bearing fault characteristic extraction accuracy of rolling bearing vibration signals, the sifting scheme is proposed for selecting the sensitive fault-related IMFs (intrinsic mode functions) generated by ESMD, in which a weighted kurtosis index is introduced for automatic selection and reconstruction of the fault-related IMFs, and then the original and reconstructed bearing fault vibration signal after performing Hilbert transform as the results to diagnose the incipient rolling bearing fault. ESMD combined with the proposed sifting scheme are applied to diagnose the simulated and experimental signals, and the results confirmed that the sifting scheme based ESMD is superior to the other conventional method in rolling bearings fault diagnosis.
Specific damping capacity calculation of composite plates with delamination based on higher-order Zig-Zag theory
Authors: Gao Chaogan , Zhou Chuwei
Published: December 2018

Damping is focused in a mass of engineering applications at present. In this paper a new laminate element rests on the higher-order zig-zag theory for composite plates were presented. And then, viscoelasticity damping and frictional damping models in delaminated composites were established. The damping changes of delaminated composites with different boundary conditions were investigated via the laminate element, the effects of area and location on damping were also researched. The results revealed that viscoelasticity damping and frictional damping are in the same order of magnitude even delamination area is small, and frictional damping increase significantly when delamination area enlarged, frictional damping is needed to be considered in the damping research of delaminated composites.
Vibration control of a hydrostatic bearing using magnetorheological elastomer shell bearing
Authors: Chikh Noureddine , Aguib Salah , Djedid Toufik , Nour Abdelkader , Tawfiq Imad
Published: December 2018

In rotating machines, random movements or sliding movements of the rotor in its housing can produce undesirable phenomena for some parts. To solve this problem, a new hydrostatic bearing with an intelligent magnetorheological elastomer sell bearing has been designed to control the undesirable vibrations of rigid rotors. The different effects of the influence parameters on the vibratory behavior of the sell bearing are calculated numerically using Abaqus software, and the results found are encouraging.
COORDENAÇÃO DE CURSOS DE GRADUAÇÃO EM ENFERMAGEM À LUZ DAS TENDÊNCIAS DE MÉTODOS DE CENÁRIOS
Authors: Nogueira Valnice De Oliveira , Cunha Isabel Cristina Kowal Olm
Published: December 2018

Objetivo: analisar o papel da coordenação de cursos de enfermagem à luz das tendências de métodos de cenários. Método: trata-se de um artigo de reflexão que interpreta as tendências de métodos de cenários mediante aos pressupostos teóricos de Jouvenel. Resultados: foram apresentadas 08 escolhas estratégicas a partir da exploração de futuros possíveis. A incorporação de novas tecnologias educacionais, a participação politica e a criação ou adequação da matriz curricular com o perfil do aluno do século XXI são exemplos. Conclusão: os cenários podem proporcionar alternativas que sejam factíveis na educação em enfermagem. Para tal, gestores, alunos e instituições devem estar comprometidos com as transformações oriundas da globalização bem como reconhecer o novo perfil dos ingressantes.Descritores: Enfermagem; Estudos do Futuro; Cenários; Bacharelado em Enfermagem; Educação em EnfermagemCOORDINATION OF NURSING COURSES IN THE LIGHT OF THE TRENDS OF SCENARIOS METHODSObjective: analyze about the role of the coordination of nursing courses in the light of the trends of scenarios methods. Method: this is a reflecting article that interprets trends scenarios methods by the Jouvenel’s theory. Results: there were presented 08 strategic choices from the exploration of possible futures. The incorporation of new educational technologies, political participation and creation or adaptation of the curriculum with the profile of the student of the 21st century are examples. Conclusion: the scenarios can provide alternatives that are feasible in nursing education. For such, managers, students and institutions must be committed to the changes arising from globalization as well as recognizing the new profile of the newcomers.Descriptors: Nursing; Future Studies; Scenarios; Bachelor’s Degree in Nursing; Nursing Education.COORDINACIÓN DE CURSOS DE ENFERMERÍA A LA LUZ DE LAS TENDENCIAS DE LOS MÉTODOS DE ESCENARIOSObjetivo: Análisis acerca del papel de la coordinación de cursos de enfermería a la luz de las tendencias de los métodos de escenarios. Método: es un artículo de reflexión que interpreta las tendencias de métodos de escenarios por los supuestos teóricos de Jouvenel. Resultados: se presentaron 08 opciones estratégicas de la exploración de futuros posibles. La incorporación de nuevas tecnologías educativas, participación política y creación o adecuación el plan de estudios con el perfil del alumno del siglo XXI son ejemplos. Conclusión: los escenarios pueden proporcionar alternativas que sean viables en la educación de enfermería. Para este tipo de gestores, estudiantes e instituciones deben estar comprometidos con los cambios derivados de la globalización, bien como reconocer el nuevo perfil de los novatos.Descriptores: Enfermería; Estudios de Futuro; Escenarios; Bachillerato en Enfermería, Educación en Enfermería.
Trust Optimization for Byzantine Attacks in Cognitive Networks
Authors: Saini Natasha , Pandey Nitin , Singh Ajeet Pal
Published: December 2018

Background & Objective:

Cognitive Radio Network (CRN) is an emerging technology
that provides ability of adapting operating parameters to wireless devices in order to overcome spectrum
scarcity problems. However, involvement of numerous pervasive smart wireless devices introduces
many security threats in CRN. The research work specifically highlights the different kinds of attacks
that occur in cognitive networks.

Methods:

The algorithm is designed which focuses on vulnerabilities that occur in any single or an individual
node. The proposed algorithm will take many factors into consideration like integer programming,
trust and Byzantine failure model. Though there are various security parameters especially the
five major attributes like integrity, confidentiality, availability, authorization, access control and nonrepudiation,
which should be considered for developing any alogotithm.

Conclusion:

Nevertheless, certain security parameters are kept into consideration, which are embedded
into algorithm to make it of its unique kind.
Utilization of volcanic ejecta as a high-performance supplementary cementitious material by gravity classification and pulverization
Authors: Tomoyose Atsushi , Noguchi Takafumi , Sodeyama Kenichi , Higashi Kazuro
Published: December 2018

The reaction of natural pozzolans is caused by volcanic glass composed of amorphous silicate; however, volcanic ejecta also contains crystal mineral, pumice, and sometimes weathered clay fraction in their natural conditions. By focusing on the differences of physical properties between these components, high-purity volcanic glass powder (VGP) was manufactured by dry gravity classification and pulverization. This paper reports the results of investigations to utilize pyroclastic flow deposits as a supplementary cementitious material (SCM).

Through this method, the glass content of VGP increased to 88% with a mean particle size of 1 μm, when that of the raw material is about 60%. Chemical analysis indicated that VGP is principally composed of silica (about 72%) and alumina (about 13%).

The performance of VGP as a SCM was evaluated by conducting tests on concrete mixtures, replacing 0% to 30% by weight of portland cement by VGP with a 20% to 60% water to cement ratio. VGP concrete showed better results of 7-and 28-day compressive strength compared to control concrete in all experiments. In particular, VGP demonstrated better flowability and strength development in concrete with a low water-binder ratio in comparison to silica fume.
Peak Outpatient and Emergency Department Visit Forecasting for Patients With Chronic Respiratory Diseases Using Machine Learning Methods: Retrospective Cohort Study (Preprint)
Authors: Peng Junfeng , Chen Chuan , Zhou Mi , Xie Xiaohua , Zhou Yuqi , Luo Ching-Hsing
Published: December 2018

BACKGROUND

The overcrowding of hospital outpatient and emergency departments (OEDs) due to chronic respiratory diseases in certain weather or under certain environmental pollution conditions results in the degradation in quality of medical care, and even limits its availability.

OBJECTIVE

To help OED managers to schedule medical resource allocation during times of excessive health care demands after short-term fluctuations in air pollution and weather, we employed machine learning (ML) methods to predict the peak OED arrivals of patients with chronic respiratory diseases.

METHODS

In this paper, we first identified 13,218 visits from patients with chronic respiratory diseases to OEDs in hospitals from January 1, 2016, to December 31, 2017. Then, we divided the data into three datasets: weather-based visits, air quality-based visits, and weather air quality-based visits. Finally, we developed ML methods to predict the peak event (peak demand days) of patients with chronic respiratory diseases (eg, asthma, respiratory infection, and chronic obstructive pulmonary disease) visiting OEDs on the three weather data and environmental pollution datasets in Guangzhou, China.

RESULTS

The adaptive boosting-based neural networks, tree bag, and random forest achieved the biggest receiver operating characteristic area under the curve, 0.698, 0.714, and 0.809, on the air quality dataset, the weather dataset, and weather air quality dataset, respectively. Overall, random forests reached the best classification prediction performance.

CONCLUSIONS

The proposed ML methods may act as a useful tool to adapt medical services in advance by predicting the peak of OED arrivals. Further, the developed ML methods are generic enough to cope with similar medical scenarios, provided that the data is available.
A Co-Designed Social Media Intervention to Satisfy Information Needs and Improve Outcomes of Patients With Chronic Kidney Disease: Longitudinal Study (Preprint)
Authors: Vasilica Cristina Mihaela , Brettle Alison , Ormandy Paula
Published: December 2018

BACKGROUND

The number of people living with a long-term condition is increasing worldwide. Social media offers opportunities for patients to exchange information and experiences with others with the same condition, potentially leading to better self-management and improved patient outcomes, at minimal costs to health service providers.

OBJECTIVE

This paper describes how an online network with a range of social media platforms was created, with the help of a group of patients with chronic kidney disease and specialist professionals. The project considered whether information needs and health-related and social outcomes were met.

METHODS

We performed a longitudinal in-depth evaluation of the creation of the moderated network, observation of the use of the platforms, self-efficacy surveys (at baseline and 6 months), and semistructured interviews (at baseline and 6 months).

RESULTS

A total of 15 patients and professionals participated in the co-design of the network (hub), which was initially launched with 50 patients. Several platforms were needed to engage patients at different levels and encourage generation of information, with the support of moderators. In addition, 14 separate patients participated in the evaluation. Satisfaction of information needs through social engagement improved self-efficacy (n=13) with better self-care and management of illness. Social outcomes included seeking employment and an increase in social capital.

CONCLUSIONS

An online network (hub) with several social media platforms helped patients with chronic kidney disease manage their condition. Careful co-designing with users resulted in a sustainable network with wider applicability across health and social care.
Video Remote Interpreting Technology in Health Care: Cross-Sectional Study of Deaf Patients’ Experiences (Preprint)
Authors: Kushalnagar Poorna , Paludneviciene Raylene , Kushalnagar Raja
Published: December 2018

BACKGROUND

The advent of new rehabilitation and assistive technologies has led to the creation of video remote interpreting (VRI) as an accessible communication technology for deaf patients. Although there has been a rapid growth in the use of VRI technology by health care providers, there is scant published information on VRI users and their satisfaction. Current, timely data are needed to understand deaf patients’ use and satisfaction with the quality of VRI technology in health care settings.

OBJECTIVE

This study aimed to investigate the national trends of deaf patients’ satisfaction with the quality of video remote interpreting (VRI) in health settings and recommend actions to improve VRI quality and deaf patients’ satisfaction with VRI in health care settings.

METHODS

Secondary data related to deaf adults’ experiences of using VRI service in a medical setting were obtained from the Health Information National Trends Survey in American Sign Language, which was administered to a US sample of deaf adults between 2016 and 2018.

RESULTS

Among our VRI users (N=555, all in the United States) who answered questions about VRI usage in health between 2016 and 2018, only 41% were satisfied with the quality of the VRI technology service. Respondents with fewer years of education or those who were male were more likely to rate the VRI quality as acceptable. After adjusting for covariates in a binary regression analysis, deaf patients’ self-reported interference (ie, VRI interpreter’s interference with disclosure of health information) increased patient dissatisfaction with the quality of VRI technology service by three-fold.

CONCLUSIONS

To increase satisfaction with VRI technology service in health care and rehabilitation settings among deaf patients, special attention needs to be given to video technology, as the use of sign language requires high-fidelity video for optimal communication between the interpreter and patient. To promote the willingness to disclose medical information through VRI among deaf patients, the interpreter must be highly skilled in both expressive and receptive communication and have the requisite background in medicine and rehabilitation.
El sistema mediático nacional como punto de partida. Los gobiernos del Frente Amplio y los medios en Uruguay
Authors: Schuliaquer Ivan
Published: December 2018

La relación entre los gobiernos de izquierda sudamericanos y los grandes grupos mediáticos nacionales a principios del siglo XXI se caracterizó por un enfrentamiento público. A diferencia de lo que sucedió en otros países, en Uruguay los gobiernos del Frente Amplio —de Tabaré Vázquez (2005-2010) y José Mujica (2010-2015)— lograron negociar —con los actores mediáticos establecidos— las escenas mediáticas, de maneras que les resultaron beneficiosas. Y lo lograron sin necesidad de modificar las reglas del juego, en tanto que los actores mediáticos más preponderantes buscaron congraciarse con sus gobiernos.

 

       Este artículo sostiene que un factor clave para explicar ese vínculo, y la diferencia con otros países, radica en el sistema mediático nacional uruguayo, lo que permite demostrar que, a escala relativa, el poder de los gobiernos es mayor para definir las escenas mediáticas. Para demostrarlo,  sugerimos un modelo propio, con el fin de caracterizar la historia de los sistemas mediáticos nacionales de América Latina, en este caso, aplicado a Uruguay a través de dos dimensiones centrales: la estructuración del campo político —a partir del peso relativo del Estado sobre el campo mediático y de la centralidad de la mediación partidaria—, y la estructuración del campo mediático —a partir de la estructuración de las principales empresas de medios y de las culturas periodísticas.