bluuebunny/crossref_metadata_2025 huggingface dataset:
Estado da arte dos fundamentos e ideias da lógica fuzzy aplicada as ciências e tecnologia
Authors: Da Silva Luciana Maria , Gonçalves Rodrigo Mikosz , Ferreira Leandro Mendes , Aristides da Silva Esdras Jafet , Da Silva Betânia Queiroz
Published: March 2020

Este trabalho apresenta uma introdução aos princípios, ideias, vantagens e desvantagens, além de distintos trabalhos que vem utilizando a Lógica Fuzzy como ferramenta de estudo, com foco em Ciências. Lógica é a ciência que tem por objetivo o estudo das leis do raciocínio. A lógica clássica é desde o tempo de Aristóteles onde se baseia na bivalência de V (verdadeiro) ou F(falso). A lógica fuzzy ou nebulosa é baseada na teoria dos conjuntos fuzzy. A partir dos anos 70, a lógica fuzzy foi disseminada em aplicações industriais, após inúmeras tentativas frustradas do Prof. Mandani em controlar uma máquina a vapor com distintos controladores, conseguindo bons resultados a partir do sistema fuzzy. No decorrer das décadas sua utilização vem avançando em distintas áreas de estudos, pesquisas e desenvolvimento. Vale destacar que, atualmente, a logica fuzzy é fundamental para aplicações em áreas incertas, onde a partir desta pode-se quantificar e qualificar as variáveis estudadas.
Aplicação de sensoriamento remoto e análise espacial em alinhamentos geológicos como indicador da potencialidade de acumulação de águas subterrâneas
Authors: Nascimento Paulo Sérgio de Rezende , Silva Nicole Príncipe Carneiro da
Published: March 2020

Os alinhamentos geológicos representam sistemas de fraturamento que possibilitam a infiltração, percolação e acumulação de águas subterrâneas em terrenos cristalinos, formando os aquíferos fraturados. A exploração de águas subterrâneas nestes aquíferos é condicionada à densidade de fraturamento das rochas cristalinas, como no caso do Agreste Sergipano. Dessa forma, o objetivo do presente trabalho foi identificar as áreas propícias ao armazenamento de águas subterrâneas através da espacialização dos alinhamentos geológicos, visando definir a potencialidade de acumulação de água subterrânea nos aquíferos fraturados do Agreste Sergipano. Foram extraídos os alinhamentos geológicos de relevo e drenagem no Modelo Digital de Elevação (MDE) e na rede de drenagem das bacias hidrográficas da área de estudo; e a consecutiva espacialização das densidades desses alinhamentos pelo interpolador Kernel. A aplicação desse interpolador possibilitou a espacialização de cinco classes de densidade de lineação, indicando a maior ou menor potencialidade de armazenamento de água subterrânea nos aquíferos fraturados das bacias hidrográficas no Agreste Sergipano. Concluiu-se que as bacias hidrográficas dos rios Japaratuba, Sergipe e Vaza Barris apresentaram as maiores potencialidades hídrogeológicas do que as bacias dos rios Piauí, Real e São Francisco nos terrenos cristalinos da área de estudo.
A new species of Cilunculus Loman, 1908 (Arthropoda: Pycnogonida: Ammotheidae) from the South-western Indian Ocean
Authors: Wang Jianjia , Huang Dingyong , Niu Wentao , Zhang Feng
Published: March 2020

A new species of Cilunculus was determined by the unique characteristic of the three distal processes present on the almost horizontal proboscis and the other differences, including a shorter and blind ocular tubercle, fewer setae on the legs and a glabrate trunk.

New Cilunculus species from the South-western Indian Ocean
Do both habitat and species diversity provide cultural ecosystem services? A trial using geo-tagged photos
Authors: Osawa Takeshi , Ueno Yusuke , Nishida Takaaki , Nishihiro Jun
Published: March 2020

Conservation for both biodiversity and ecosystem services are an important issue worldwide. However, knowledge of their relationship remains limited. As habitat structure is strongly related to regional biodiversity, we studied cultural ecosystem services by using habitat structure as a proxy for biodiversity. Specifically, we used human preference, assessed by using photos with location information (i.e. geo-tagged digital pictures) as an index of a cultural ecosystem service. We conducted nature walks in semi-natural environments for cognitively-impaired students from a local special school and studied the photos they took during the walks. We analysed the habitat preferences inferred from the photo locations and the composition of the photos—whether they were close-up, scenic or landscape views. The results showed that levels of human preference and biodiversity, indicated by habitat structure, had a positive relationship. During spring to autumn, when levels of biological activity are higher, people tended to show more preference in close-up views (i.e. the subject of the photo was the species itself). In winter, they tended to be interested in scenic views that were not strongly influenced by species diversity. Additionally, photos taken in areas with threatened species almost always included close-up views, although not of the threatened species themselves. Areas with high species diversity therefore appeared to be more appealing to the participants. These results suggest that habitat diversity could not only contribute to biodiversity, but also provide cultural ecosystem services. Habitat conservation for semi-natural environments could be synergised for both biodiversity conservation and general human well-being.
Ancrages et objectivations de la représentation sociale du luxe. Une comparaison France – Russie
Authors: Moliner Pascal , Bovina Inna , Juventin Jérémy
Published: March 2020

On a demandé à des participants français (n = 102) et russes (n = 74) de produire cinq associations verbales à partir du terme inducteur « luxe ». L’analyse de ces productions verbales est réalisée dans le cadre de la théorie des représentations sociales en supposant que les dimensions classiquement identifiées par la recherche en marketing (dimensions financière, fonctionnelle, personnelle et sociale) constituent des points d’ancrage de la représentation sociale du luxe. Les résultats montrent que l’on retrouve effectivement ces ancrages dans les productions associatives des participants. On constate en outre que pour les participants interrogés, le luxe évoque massivement différents objets qui lui sont associés. Ce constat est analysé au regard du processus d’objectivation décrit par la théorie des représentations sociales. Les résultats montrent alors qu’à propos de la représentation sociale du luxe, la hiérarchie des processus d’ancrage et d’objectivation n’est pas la même entre les participants français et russes. Ces résultats sont discutés au regard de leurs implications pour la théorie des représentations sociales.
Financer la décarbonation
Authors: Giraud Gaël
Published: March 2020

L’obstacle principal à la lutte contre la crise écologique est financière, donc politique. Les États cherchent des investissements dans le secteur privé, mais les banques restent attachées aux énergies fossiles. Une régulation des banques est donc nécessaire.
Les marchés financiers et la planète
Authors: Bouleau Nicolas
Published: March 2020

Les marchés financiers mis en place après la Seconde Guerre mondiale, mathématisés, spéculatifs et volatiles, ne rendent pas visible la rareté d’un bien sur son prix. On ne peut préserver la nature en lui donnant un prix.
Nulle part
Authors: Hervé-Molnar Judith
Published: March 2020

Une rescapée d’Auschwitz se rappelle l’odeur de la fumée des crématoires, la lutte pour la survie, le néant de sentiments et ses cauchemars.
Automation in Healthcare
Authors: Aggarwal Alankrita , Dhindsa Kanwalvir Singh , Suri P. K.
Published: March 2020

Major challenges to the society are the people have aging populace and occurrence of continual diseases and eruption of transferable diseases. to embark upon these unmet healthcare desires for the quick guess and therapeutic of all the important diseases a new area called health informatics is emerging as an interdisciplinary research which is dealing with the getting hold of, spread, dispensation, to store as well retrieve. Particularly when the industry is acquired the health information by using the unassuming sense and wearable technology is well thought-out as groundwork stone in healthiness industry. According to a reports, sensors can be worn and hooked on clothes which can acquire the health information uninterrupted.
An Effective Diagnostic Model for Personalized Healthcare Using Deep Learning Techniques
Authors: Agarwal Parul , Hassan Syed Imtiyaz , Mustafa Syed Khalid , Ahmad Jawed
Published: March 2020

This chapter discusses a deep learning and IoE (Internet of Everything) based analytical model for disease detection, prediction and correct treatment for the patient would be proposed. In the proposed model, all the stakeholders, namely doctors, patients, medical staff within a clinic, hospital or a medical institute, would be embedded with micro-sensors. The sensors would in turn sense and capture the information gathered from these sources and the surrounding environment and then send it to a single repository, a base or a server, where it would be stored for further processing. These sensors produce massive amounts of data, which needs to be encrypted as well. Then, in order to improve the effectiveness and accuracy of prediction from the data received from these sensors, deep learning methods are used. Further, the advantages of the proposed model would be explored. To conclude, the limitations, opportunities and future applications of deep learning techniques would be discussed in this chapter.
Real-Time Mental Health Monitoring
Authors: Wason Ritika , Rana Prashant Singh , Jain Vishal
Published: March 2020

Mental disorders have been identified as one among the leading causes of the global disease burden. Despite being one of the first nations in the world to identify mental health as an important indicator of personal well-being and having adequate plans and policies for ensuring the same, one in every seven Indians is affected by mental disorders of varying severity. Through this manuscript we try to analyze how real-time mental health monitoring has helped improve productivity among the global workforce as well as prevented deterioration of individual mental health across the globe. Our main plan of this study is to identify the significant efforts in mental health monitoring across the globe and then chalk out a real-time mental health monitoring framework for India. We also propose a real-time mental health monitoring smartphone-based framework for India we name as SmartMHealth. We describe the basic components of this framework in this study itself.
A Surrogate Data-Based Approach for Validating Deep Learning Model Used in Healthcare
Authors: Srivastava Meenakshi
Published: March 2020

IoT-based communication between medical devices has encouraged the healthcare industry to use automated systems which provide effective insight from the massive amount of gathered data. AI and machine learning have played a major role in the design of such systems. Accuracy and validation are considered, since copious training data is required in a neural network (NN)-based deep learning model. This is hardly feasible in medical research, because the size of data sets is constrained by complexity and high cost experiments. The availability of limited sample data validation of NN remains a concern. The prediction of outcomes on a NN trained on a smaller data set cannot guarantee performance and exhibits unstable behaviors. Surrogate data-based validation of NN can be viewed as a solution. In the current chapter, the classification of breast tissue data by a NN model has been detailed. In the absence of a huge data set, a surrogate data-based validation approach has been applied. The discussed study can be applied for predictive modelling for applications described by small data sets.
Managing the Scarcity of Monitoring Data Through Machine Learning for Human Behavior in Mental Health Care
Authors: Dixit Nitesh Kumar , Agarwal Dileep Kumar , Kumar Mahendra
Published: March 2020

Nowadays, in many fields, including medicine and public health, developments in information and communication technology have introduced a revolution. Due to the absence of effective machinery algorithms and many possibilities to enhance patient understanding of chronic diseases, information gathered from the distinct sources were ignored. Therefore, researchers are investigating information shortages of computer training methods. This work recommends a fresh strategy to produce stronger predictive models specifically intended for the problems. In order to address the scarcity of data, works propose to make use of a semi-managed learning environment while using all unlabeled data sets. The techniques suggested were implemented in the mental health care field of bipolar disorder. The methods suggested enhancing the efficiency of ranking to the accuracy of ≈ 73% to ≈ 90%. The results have been achieved by overcoming previous methods that use traditional monitored methods of learning.
The Educational Research Flipped Inclusion Between Social Metamorphosis and Technocratic Hybridizations
Authors: De Giuseppe Tonia , Ianniello Annalisa , Podovšovnik Eva , Corona Felice
Published: March 2020

In the post-modern glocal society, with an economy of continuous training generated by a trans-human technological expansion, we are witnessing an informative consumerism and a capitalism of knowledge that produces a socio-economic co-evolution. The complex idiomatic locution flipped inclusion, introduced in the descriptive-transformative experimental research at the University of Salerno from 2014, crosses, declines, and transposes the concept of inclusion as a social construct in an ecological-systemic perspective and the logic of flipped learning in a systemic learning perspective – learning organization, learning of society, lifelong learning.
An Ecological Approach to Technology Appropriation
Authors: Karademir Coşkun Tugra , Alper Ayfer
Published: March 2020

The study aims to construct an innovation-based digital learning material (DLM) development ecosystem that penetrates and sustains within the school culture in order to diffuse and maintain DLM development. Sixty-two teachers from 21 different branches participated in this nested mixed design study. Data were collected through scales and interviews, and the study was based on the steps adopted by Rogers on the diffusion of innovation. Quantitative data were analysed with cluster analysis, logistic and multi-linear regression. Qualitative data were analysed with structural, in vivo, and axial coding in order to construct the ecosystem. The findings demonstrate that the main variables, which were determined to influence the adoption and sustenance of DLM development by teachers, were the support of administrators and colleagues, the willingness and need to develop DLM, computer knowledge, and DLM development self-efficacy.
Digital Skills and Behaviours of Youth That Are Relevant for Digital Culture
Authors: Vujičić Miroslav D. , Stankov Uglješa , Kovačić Sanja , Vasiljević Đorđije A. , Pivac Tatjana , Čarkadžić Jana , Mujkić Dino , Cimbaljević Marija
Published: March 2020

With the proliferation of ICT and ubiquitous access to the internet, the cultural sector has been strongly affected. It had to rethink its new role by moving from a process of transforming from analogue to digital, to more engaging actions within the digital transformation. Here, one of the most important constituents was digital competencies of cultural sector employees. There is a need to provide the cultural sector with an insight into digital skills of youth that are relevant for digital culture, both in terms of their future employability and the way they consume culture. To this end, the chapter introduces the basics of digital culture and skills needed in the digital era. An exploratory study in two countries was done – Serbia and Bosnia and Herzegovina based on the self-evaluation of youth digital skills. This chapter evaluates basic, specialized, and advanced digital skills and identifies the gaps and gives propositions relevant to the cultural sector.
Online Informal Language Learning Among Foreign Language Teachers
Authors: Jurkovič Violeta , Kilar Vita , Lenassi Nives , Mertelj Darja
Published: March 2020

Today's online world provides foreign language users and learners with a multitude of opportunities to engage in a variety of language activities. A social group that can derive major benefits from the availability of online resources in different languages is foreign language teachers. Based on an ‘emic' approach, this study involves case studies of three experienced foreign language teachers that used diaries over a period of eight weeks to report on every instance of online use of their predominant foreign language and English. Semi-structured interviews were used to obtain insight into online behaviour that was not specifically related to the eight-week period of diary-keeping. The results indicate that the online uses of the three participants, although they belong to the same social and age groups, display great variety in terms of online activities and the predominant language used to perform these activities.
Teacher Technology Education for Spatial Learning in Digital Immersive Virtual Environments
Authors: Santoianni Flavia , Ciasullo Alessandro
Published: March 2020

The aim of this research is to deepen how teacher technology education can be designed to enhance spatial education, which is intertwined with digital education. The evolution of technology resources can actually sustain spatial learning. In the last years, the user experience has been improved by open-source, collaborative user-generated, and immersive content of synthetic learning environments. This research analyses which spatial design principles have influenced the virtual worlds of digital immersive virtual learning environments. In 3D virtual learning environments spatial interaction is really developed and may open full accessibility to further studies on digital and spatial education. In the joined field of learning and ICT, the main scope of digital technology knowledge sharing, and re-shaping, is the enhancement of digital skills based on experiences in educational activities and the re-thinking of the nature and the format of educational curriculum to implement more experiences in the digital—and, possibly, spatial—fields.
Detection of Epileptiform Seizure From Pre-Ictal Part of Epileptic EEG Recording
Authors: Das Khakon , Saha Shankar Prasad , Singh Kundan Kumar
Published: March 2020

Nowadays, the most common neurological disorder is Epilepsy. An epileptic seizure is a sudden synchronous and repetitive discharge from brain cells. The seizure is very dangerous and life-threatening for people affected by Epilepsy, as this may occur anywhere and anytime. The analysis of Electroencephalogram data (EEG) is a difficult task for a neurologist to go through the entire EEG records visually, in consideration with an increasing number of channels and more extended EEG recording. Authors are working to develop a system that gives a warning message so a safety measure can be taken before the seizure occurs. To do that, authors analyze epileptic EEG data in depth to get unique characteristics from EEG data, namely, disrupts background; sharply define components, Electrocerebral negativity, and electrical field. With the consideration of all of the above attributes of Epilepsy, an algorithm is developed, which is able to segment out the susceptible seizure waveform occurrence from EEG recording (onset) in different channels.
Electronic Tongue for Tea Quality Assessment
Authors: Saha Pradip , Ghorai Santanu , Tudu Bipan , Bandyopadhyay Rajib , Bhattacharyya Nabarun
Published: March 2020

Biochemical means of tea quality evaluation is quite accurate, but it requires very costly instruments and takes a long time to conduct the experiment. Researches show that thearubigin (TR) and theaflavin (TF) are the two most important biochemical compounds present in tea liquor on which liquor characteristics of black CTC tea depends. Consequently, this fact may be the basis of determining tea quality by assessment of TR and TF via electronic tongue (ET) response. This technique is free from subjective factors. In literature, there are only two research works using this technique so more research work is required to address the problem. This chapter proposes a modeling technique of ET response using sparse decomposition technique to estimate TR and TF content in a given tea sample. For each tea sample, sparse model coefficients obtained from the ET response is considered as a characteristic attribute of it. Experimental results using dissimilar regression models show high prediction accuracies which justify the efficacy of the proposed method.
Instrumentation and Automation Grounding
Authors: Ghosh Shreem , Ghosh Arijit
Published: March 2020

In any electrical or electronic systems, unwanted signals known as noise signals are encountered which interact with the true signal and thus affecting signal quality. Noise may enter into a device or system in many forms and have a different order of impacts. Prevention and elimination of noise had attained paramount importance to ensure signal fidelity. This chapter presents a comprehensive analysis on elimination of noise by electronic grounding of instrumentation and automation systems as well as various engineering considerations for the same.
Characteristic Behavior of PVDF-Compliant Structure as an End Effector Using Creo Element/Pro Release 5.0
Authors: Sahay Neeta , Chattopadhyay Subrata
Published: March 2020

The tremendous area of application of microprocessors and microcontrollers has exhausted the demand for polymers as sensors among the fastest growing technologies of the $18 billion sensor market worldwide. This chapter presents the study of characteristic behavior of a compliance structure made of PVDF (Poly Vinylidene Fluoride) material which is acting as an actuator and sensor, too. The inverse piezoelectric nature of PVDF has been used to produce the required amount of force by applying the voltage at a specific point at the base of the structure which is generating the opening and closing of the end effector. The displacement of the tip of the end effector can be sensed by generated voltage of piezoelectric effect of PVDF.
The Role of Innovation in Sustainable Entrepreneurship
Authors: Terán-Yépez Eduardo , Marín-Carrillo Gema M. , Casado-Belmonte M. Pilar , Capobianco-Uriarte María de las Mercedes
Published: March 2020

Literature argues that innovation has an inherent and critical relevance in sustainable entrepreneurship (SE). However, due to the variety of innovation types and the broad spectrum covered by this concept, there is not a clear understanding of which roles innovation plays in SE. To address the limitations of current literature, the main objective of this chapter is to conduct a literature review on underlying the roles of innovation in SE. The literature analysis reveals seven different roles that innovation adopts in SE and that those have seldom been related to each other. This chapter closes this gap by discussing and suggesting an integrative and dynamic framework of how these roles possess parallel ways, superpose, and influence one another, suggesting that SE actually is about a multi-innovation implementation process.
Teaching Sustainable Entrepreneurship and Leadership
Authors: Pandey Satyendra C. , Pattnaik Pinaki Nandan
Published: March 2020

Sustainability has been a part of the corporate lexicon for over a decade now. This has made it important for business schools across the globe to recognize the importance of sustainability and incorporate it into the curricula to train future managers. There are very few instances of having a core specialization being offered in the area of sustainability in an Indian management institute. This case study is an experiential documentation of a course titled Sustainable Entrepreneurship and Leadership offered at a leading university in India. This is a case study of the development of course in Sustainable Entrepreneurship and Leadership: its curriculum design, pedagogy, and evaluation methods. Through this course, an attempt was made to introduce the concept of sustainability in leadership and entrepreneurial ventures to the students. Also, a tryst was made to develop an appreciation towards the triple bottom line of profit, people, and the planet.
Exploring Internationalization in Sustainable Entrepreneurship
Authors: Casado-Belmonte María del Pilar , Terán-Yépez Eduardo , Carrillo Gema Marin , Capobianco-Uriarte María de las Mercedes
Published: March 2020

Sustainable entrepreneurship has become a central topic in research, although there exists a lack of study between the approaches to internationalization in sustainable businesses. This chapter aims at providing an examination of the relationship between SE and internationalization. In this way, the question of how and why firms involved in SE enter international markets, their challenges and difficulties in the process, and the different pathways are explored. Especially, the focus lies on the impact of SE involvement on the engagement in an international process. To achieve this goal, two main streams of literature are used: internationalization theories and sustainable entrepreneurship theory. The discussion section offers some future research questions worth studying.
Creating Hybrid Social Ventures Through Effectuation and Bricolage
Authors: Olive-Tomas Antoni , Gonzalez-Sabate Lucinio
Published: March 2020

In the abundant literature on social entrepreneurship, little attention is paid to the creation process of hybrid social ventures, beyond the assumptions that they are originated by market failures and are born to alleviate a social problem. Using a qualitative approach based on semi-structured interviews, the authors derive a process model explaining the creation of hybrid social ventures through effectuation and bricolage. They show that these decision-making tools may play a role in the creation process and that the new venture may have the defining characteristics of opportunity creation. They conclude that for a new venture to be created as a hybrid firm, a dual mission-goal with a social problem as the trigger and a financial goal to ensure sustainability are required.
Mindfulness Approach to Ethical Consumption
Authors: Kieu Tai Anh , Le Tri D.
Published: March 2020

Consumer ethics has increasingly attracted attention by academics and practitioners in recent years. Nonetheless, research so far has mostly focused on understanding consumer's ethical judgments and the associations between those ethics-related general attitudes and selected antecedents drawn from Hunt-Vittel Theory of Ethics. Nonetheless, evidence in practice raises more serious doubts about validity of ethical judgments as a measure of consumer ethics, reminding the attitude-behaviour gap that has been long discussed in the literature. On the other hand, as the ethical consumption turns to the mainstream market, there has been a question whether antecedents of consumer ethical behaviour widely investigated in the literature will exert the same influence on mainstream consumer behaviour. This chapter proposes a conceptual framework arguing for new approach to understand and measure ethical consumption. Implications and research directions are also provided.
Experimental Investigation and Yield Line Prediction for Ultimate Capacity of Recycled Aggregate Concrete Slabs
Authors: Ekolu Stephen O. , Mohamed Zaid , Kay Sean
Published: March 2020

The present investigation was conducted to evaluate the influence of recycled aggregates on structural behaviour of reinforced concrete (RC) slabs. Concrete mixtures of 0.6 and 0.4 water/cement ratios were used to produce normal strength concretes and high strength concretes, respectively. Various concrete mixtures were prepared by replacing 19 mm natural coarse aggregates with 0, 25, 50, 100% recycled coarse aggregate (RCA) then used to cast RC slabs of size 500 x 300 x 100 mm thick, and 100 mm cubes. The two-way concrete slabs were reinforced orthotropically with Y12 steel bars. Workability, compressive strength, and split tensile strength properties of concrete were measured, while the RC slabs were subjected to monotonic loading until failure. The experimental results obtained were compared with theoretical failure loads predicted using the yield line theory. It was found that the use of RCA in concrete generally leads to reduction of workability and concrete strength in proportion with the RCA content incorporated into the mixture. The yield line method gave a conservative and accurate theoretical prediction of the actual ultimate loads for control concretes, predicting 10% lower values, but it exhibited loss of prediction accuracy for RCA concretes of normal strengths basically overestimating their failure loads. Accordingly, it would be unsafe to employ the yield line method for design of RCA concrete slabs of normal strengths. Generally, the adverse effects of RCA on concrete properties and structural behaviour can be mitigated significantly by adjusting mixture designs to higher strengths or by employing high strength concretes
Infrared and Raman Spectra of Nanoporous SiO2 Matrix Filled with BaTiO3 Nanoparticles
Authors: Roldan Lopez Jose Angel , Angelats Silva Luis Manuel , Emelianov Nikita A. , Korotkov Leonid N.
Published: March 2020

Nanocomposite in the form of a porous matrix SiO2 with average pore size of 320 nm filled with barium titanate nanoparticles in paraelectric cubic phase was obtained. Shift of the stretching vibration of Si–O–Si to higher frequencies caused by increased strengthening of the network in the matrices has been observed. Also demonstrated that decrease in the intensity of the absorption relating to Si–O(H) stretching vibration relative to Si-O(−Si) stretching vibration. Raman scattering spectra demonstrate the presence of both a cubic and a tetragonal ferroelectric crystalline phase in the filler nanoparticles. Thus, the mechanical deformation of nanoparticles in the pores of the matrix can lead to a change in the crystalline phase of the filler.
Enhanced Electromagnetic Wave Shielding Effectiveness of Carbon-Based Nonwoven Fabrics by H2 Plasma Treatment
Authors: Kim Hyun Ji , Kim Sung Hoon
Published: March 2020

Electromagnetic wave shielding effectiveness of the nonwoven fabrics was measured in the wide operating frequency range, namely 0.4GHz to 20GHz. The shielding effectiveness of the nonwoven fabric was below 45dB in the range of 0.04GHz to 15GHz and then it increased to above 45dB in the range of 15GHz to 20GHz. To enhance the electromagnetic wave shielding effectiveness of the nonwoven fabrics, 3 minutes H2 plasma treatment of the nonwoven fabrics was carried out under the microwave plasma-enhanced chemical vapor deposition system. By H2 plasma treatment, the shielding effectiveness of the nonwoven fabrics was greatly enhanced in the whole operating frequency range. The surface electron conductivity of the nonwoven fabrics was also enhanced from 2.11×103 S/m to 3.02×103S/m by H2 plasma treatment. The surface and cross sectional morphologies of the nonwoven fabrics with or without H2 plasma treatment were investigated and compared with each other. Crystal structure variation of the nonwoven fabrics by H2 plasma treatment was also investigated. Based on these results, the cause for the enhancement of the shielding effectiveness of the nonwoven fabrics by H2 plasma treatment was suggested and discussed.
A Bibliographic Historical Analysis on Geopolymer as a Substitute for Portland Cement
Authors: Alves Lais Amaral , Nogueira Arissa , Vazquez Elaine , de Barros Silvio
Published: March 2020

Growing concern about environmental degradation has expanded the search for new technologies that could ensure sustainable development. In civil construction, new materials have emerged as alternatives to reduce the impact of the activity on the environment, one of them is the geopolymer. This material, which can be characterized as a stable and synthesized composite of aluminosilicate materials, has emerged as a potential substitute for Portland cement because it presents similar characteristics of initial strength and good mechanical performance, but without the high emission of carbon dioxide (CO2) to obtaining it. This work brings a bibliographic analysis on geopolymer, it is intended to disseminate knowledge as of the state of the art on geopolymer as cement substitute.
PCL Scaffold for Osteochondral Defect Treatment
Authors: Blahnová Veronika , Vocetková Karolína , Hlinkova Jana , Divin Radek , Amler Evzen , Filová Eva
Published: March 2020

Osteochondral defects develop as a result of trauma, microtrauma, avascular necrosis or cancer. These are usually pre-arthrotic conditions, accompanied by chronic pain and limited joint mobility leading to decreased quality of life of the affected patients. The bone itself has self-repair potential facilitated by mesenchymal stem cells and other cells present in the bone tissue. On the other hand, mature cartilage has very low regenerative capacity due to limited mitotic potential of chondrocytes and lack of vascularization. Therefore, there is an effort to develop an alternative treatment strategy supporting and accelerating natural healing processes. We have designed nanofibrous scaffolds made of poly‑ε‑caprolactone/hyaluronic acid and enriched with specific growth factors – “osteogenic” part with BMP‑2 and “chondrogenic” part with bFGF and TGF‑β. These two parts are meant to be combined in one biphasic non‑cellular scaffold which would be possible to implant in the site of injury and serve as a mechanical support for the cells. We examined proliferation and viability of cells, depth of their penetration into scaffold, cell distribution, alkaline phosphatase activity and extracellular matrix proteins expression. We showed both “osteogenic” and “chondrogenic” scaffold was suitable for cell growth. Moreover, in comparison to the control samples, these two scaffolds exhibited positive effect on chondrogenic and osteogenic differentiation, respectively.
Application of System Analysis for Technological Processes Investigation
Authors: Polyakova Marina , Shiriaeva Elena , Iansaitova Milyausha
Published: March 2020

System analysis is used as the effective way for design and modification of different kinds of technical systems. Application of system analysis to any technological process allows to present the links between input and output parameters which makes it possible to analyze its effectiveness and effect on the process for manufacturing of the object with necessary level of quality. The paper presents results of system analysis application for multioperational technological processes. The main aim of hot rolling process is manufacturing the hot rolled metal sheet with definite geometrical parameters which are necessary for further cold rolling process. The scheme of hot rolling operation with its input and output links is presented. The obtained results can be used for mathematical modeling of hot rolling operation. It is shown the application of system analysis for technological process of coating on the example of vacuum ion-plasma coating process. Because of existence of operated, noncontrolled, and indignant parameters of the coating process application of system analysis is the effective way for structural analysis of this technical system. It is proposed to supplement system analysis with function-oriented analysis. This approach can state the links between properties of the object which are sufficient for its application and technological parameters of the manufacturing technological process.
Comparison of Laser Sintering of Silver Nanoparticles in Form of Microdroplets of Nanoink and Dry Nanoparticles Obtained in a Gas Discharge
Authors: Arsenov Pavel V. , Efimov Alexey A. , Khabarov Kirill M. , Kornyushin Denis V. , Ivanov Victor V.
Published: March 2020

This article presents a comparison of laser sintering of deposited nanoparticles obtained by two methods of aerosol jet printing. The first printing method was based on the use of silver nanoparticles in the form of microdroplets contained in nanoink. In the second method, dry nanoparticles were obtained as a result of gas-discharge synthesis without the use of solvents. The nanoparticles in both experiments were deposited on a glass substrate in the form of a line with a width of about 50 ± 5 μm and a height of about 1.0 ± 0.2 μm. Then, the obtained lines were sintered using laser radiation with a wavelength of 1064 nm. As a result of experiments on the deposition and sintering, it was found that the electrical resistivity of the lines of sintered nanoparticles in the form of nanoink and dry nanoparticles obtained in a gas discharge was 8.1 and 4.9 μΩ·cm, respectively. Thus, it has been demonstrated that laser sintering of nanoparticles obtained in a gas discharge makes it possible to achieve a lower specific resistance of lines than the method of aerosol printing using nanoink. In addition, the electrical resistivity of the lines of sintered nanoparticles obtained in a gas discharge is 3 times greater than the electrical resistivity of bulk silver, which is a sufficient result for the creation of conductive elements of printed electronics.
Annealing Effects on the Microstructure and Thermomechanical Properties of New-Generation ODS Alloys
Authors: Khalaj Omid , Jirková Hana , Jeníček Štěpán , Račický Antonín , Svoboda Jiří
Published: March 2020

Recently, the use of high temperature materials are became more common in different types of engineering activities. The new generation of Oxide dispersion strengthened alloys (ODS) consist of Fe-Al matrix with small oxide particles dispersed within it, was generated by the authors to keep their mechanical properties at elevated temperatures. The new ODS prepared by means of mechanical alloying and hot consolidation. The preliminary tests results shows a better oxidation resistant, creep and Ultimate Tensile Strength (UTS) compare to similar materials. To go more inside in thermomechanical and microstructural properties, a series of different test were performed on different variant of ODS which manufactured by the authors. The results show that the annealing time and temperature has a significant influence on these properties while almost total recrystallization of grains and subgrains were observed during the investigation.
Processing a Brookfield Rotational Viscometer Measurement Results in the MATLAB
Authors: Kurkin Evgenii Igorevich , Chertykovtseva Vladislava Olegovna , Zakhvatkin Yaroslav Vyacheslavovich
Published: March 2020

The Brookfield_to_MATLAB and ViscosityApproximation codes for processing of experiments results for determination of viscosity on a rotational Brookfield DV3T viscometer is developed in the MATLAB. The codes allow to carry out automatic capture data, to calculate the shear rate for standard spindles RV-1 ... RV-7, to sort the measurement results on temperatures, to combine the experimental data and to determine the coefficients of the Andrade type power-law model. Paper describes experiment results on determination of viscosity of the epoxy binder reinforced by short carbon fibers. The coefficients of the viscosity model are determined by the linear regression coefficients. The obtained determination coefficient shows a good agreement of the model with the experimental data. The results are used for study various contents of a mass fraction of fibers: 0%, 5%, 10%, and 15%.
Poroelastic Material for Urban Roads Wearing Courses
Authors: Ejsmont Jerzy , Swieczko-Zurek Beata
Published: March 2020

Conventional road materials used for producing wearing courses of roads are based on mineral aggregate and bituminous or Portland cement binders. The road materials must be optimized for different properties, including skid resistance, durability, rolling resistance and tire/road noise. Unfortunately, it seems that within classic technologies it is very difficult to achieve further reduction of tire/road noise. Innovative porous material PERS that contains considerable amount of crumb rubber seems to have great potential of traffic noise reduction. The paper presents brief history of PERS development, its present stage and unexpected properties, for example, spill fuel fires retardation.
Anticoagulation therapy in older patients at risk for syncopal and not-syncopal fall and/or frailty. An AcEMC-GIMSI multidisciplinary consensus document
Authors: Casagranda Ivo , Ungar Andrea , Prevaldi Carolina , Abete Pasquale , Biagioni Sergio , Del Rosso Attilio , Diamanti Michele , Fanciulli Alessandra , Fumagalli Stefano , Furlan Raffaello , Lerza Roberto , Locatelli Carlo , Maggi Roberto , Mussi Chiara , Numeroso Filippo , Rabajoli Filippo , Testa Sophie , Tomaino Marco , Brignole Michele
Published: March 2020

In aged patients, the most frequent indications for anticoagulation are atrial fibrillation (AF) and venous thromboembolism for stroke and systemic embolism prevention. Despite systemic anticoagulation recommended by current guidelines for patients over 65 years, in clinical practice up to 50 % of elderly patients do not receive maintenance anticoagulation therapy. This is particularly evident in frail subjects at risk of syncopal and not-syncopal fall, fearing intracranial bleeding following a fall. As the risk of bleeding associated with falls is still debated, the boards of the Academy of Emergency Medicine and Care (AcEMC) and the Italian Multidisciplinary Working Group on Syncope (GIMSI), in order to write a consensus document, submitted to a panel of experts eight statement which could represent as many controversial topics for anticoagulant prescription in patients over 75 years. The Delphi method was used to obtain consensus between 15 physicians from different medical specialties; some of them were expert in syncope management and worked in a Syncope Unit. All had experience in prescribing oral anticoagulation. A questionnaire was sent on the appropriateness of oral anticoagulation in eight clinical situations where the risk of fall is present (frailty, cognitive impairment, previous falls, absence of caregiver, chronic renal impairment, nonvalvular AF with HAS-BLED score ≥3 or CHA2DS2-VASc score ≥3). All experts completed the questionnaire within three rounds and the consensus was reached on many but not all statements, leaving room for debate on some clinical situations. The consensus document gives useful advice for elderly patients’ management, who need oral anticoagulant therapy but are at risk of syncopal or not-syncopal fall. Nonetheless, there are some unresolved issues where an individual decision should be taken by the physician in agreement with the patient.
Heteroptera collected in Valsesia, Northern Italy
Authors: Dioli P. , Boggio C.M.T. , Limonta L.
Published: March 2020

The survey of Heteroptera carried out in 2016 along the nature path “Bosco dei Tigli” (Lime Trees Wood) in Piode (Piedmont, 900 m a.s.l.), highlighted 74 species, belonging to 68 genera in total. The number of species of each family well represents the Italian Heteroptera composition, with the prevalence of Miridae and Pentatomidae. The Miridae Criocoris nigripes var. apicalis (Fieber, 1861), a new record in the Alps, and Dicyphus flavoviridis (Tamanini, 1949), an Italian endemic taxon, were collected. Atractotomus parvulus (Reuter, 1878) and Orthotylus viridinervis (Kirschbaum, 1856) were recorded for the first time in Piedmont. Piode is the most Northern area, with Sondrio, where the Mediterranean Lygaeidae Oxycarenus lavaterae (Fabricius, 1784) was found.
Safety Considerations for Malaria Volunteer Infection Studies: A Mini-Review
Authors: Odedra Anand , McCarthy James S.
Published: March 2020

Malaria clinical studies entailing the experimental infection of healthy volunteers with Plasmodium parasites by bites from infected mosquitos, injection of cryopreserved sporozoites, or injection of blood-stage parasites provide valuable information for vaccine and drug development. Success of these studies depends on maintaining safety. In this mini-review, we discuss the safety risks and associated mitigation strategies of these three types of experimental malaria infection. We aimed to inform researchers and regulators who are currently involved in or are planning to establish experimental malaria infection studies in endemic or non-endemic settings.
Effect of Nitrogen on the Intergranular Stress Corrosion Cracking Resistance of 316LN Stainless Steel
Authors: Toppo Anita , Shankar Vani , George R.P. , Philip John
Published: March 2020

Here the effect of nitrogen on the intergranular stress corrosion cracking (SCC) resistance of sensitized Type 316LN stainless steel containing different amounts of nitrogen is reported. SCC studies were performed at 70% of yield strength. Double-loop electrochemical potentiokinetic reactivation technique was used to quantify degree of sensitization (DOS) that was correlated with SCC resistance. SCC time to failure increased from 220 h to 285 h with increasing nitrogen content from 0.07 wt% to 0.14 wt%, but decreased drastically to approximately 120 h at 0.22 wt% nitrogen (i.e., beyond N solubility limit), due to excessive precipitation of Cr23C6 and Cr2N and drastic reduction in the coincidence site lattice (CSL) boundary distribution from 48% to approximately 32%. Scanning electron microscope images showed mixed mode of failure.
A valorização do meio ambiente: da proteção aos seguros ambientais
Authors: Brandalise Anne Pinto , Leite Elaine Silveira
Published: March 2020

O objetivo do artigo é analisar como se desenvolve a valorização da proteção ambiental a partir do mercado segurador. Partindo de Zelizer e demais autores que abordam o mercado como construção social, resgatamos a história dos seguros no Brasil, compreendendo o processo de estabelecimento deste mercado, identificamos as justificativas empresariais e como se dá a recepção do seguro ambiental através da legislação, analisamos a transformação do risco ambiental em produto, identificamos o impasse entre oferta e demanda e concluímos apontando as narrativas e moralidades deste mercado. A pesquisa baseia-se em uma análise documental e entrevistas. A principal evidencia da pesquisa é que este mercado incorpora diferentes valores ao longo da história das seguradoras, os quais justificam e legitimam as suas atuações que incorporam valores ligados a proteção ambiental quando passam a vender os Seguros Ambientais.
Assistentes sociais para além do serviço social
Authors: Simões Pedro
Published: March 2020

O artigo discute a utilização da denominação “assistentes sociais” como forma de designação dos trabalhadores da assistência social, para além daqueles formados nos cursos de serviço social. O texto mostra que as fragilidades da estruturação do serviço social, como profissão, no Brasil e em diversas experiências internacionais, fazem desta atividade uma ocupação sem contornos claramente definidos. Com isso, há uma utilização por diversos agentes sociais, no mercado de trabalho,  da nomenclatura “assistentes sociais”. O artigo demonstra, utilizando dados do Censo 2010 que, a partir da Classificação Brasileira de Ocupações (CBO) é possível identificar “assistentes sociais” com os mais variados perfis, tanto técnicos quanto com nível superior, todos utilizando a mesma referência ocupacional.