bluuebunny/crossref_metadata_2025 huggingface dataset:
The Impact of Instructor Twitter Use on Course Performance Indicators
Authors: Fife Eric M. , Nelson C. Leigh , Clarke Theresa B.
Published: April 2018

An exploratory quasi-experiment of college-level students was used to examine the difference in a variety of course indicators among instructors when they did not use Twitter as a supplement to their courses, when they moderately used Twitter, and when they used Twitter a great deal in their courses. When instructors used Twitter in their classes, perceived learning via technological mediums, perceived classroom community with regard to technological media, perceived pedagogical affect, perceived course effectiveness, perceived learning performance, and perceived perception of learning from Twitter were all greater than when they did not use Twitter in their courses. Overall results of this study recommend further research and a continued focus on the usage of Twitter in the higher education classroom.
Case Study of HyFlex Course Design
Authors: Abdelmalak Mariam Mousa Matta , Parra Julia Lynn
Published: April 2018

The purpose of this qualitative comparative multiple-case study was to explore students' perspectives regarding implementation of HyFlex course design in a graduate level course. The main feature of HyFlex is related to hybrid and flexible student attendance: students choose how and when they achieve attendance. The data collection sources in this case study included interviews of six graduate students, class observations, recordings of class meetings, and related online course artifacts. Results indicated that participants perceived both benefits and challenges related to HyFlex implementation. Benefits included (1) accommodating for students' needs and life circumstances, (2) differentiating instruction, (3) increasing access to course content and instruction, and (4) encouraging student choice and control. Challenges included (1) students taking advantage of the flexibility and (2) technical difficulties. Additionally, for this chapter, the instructor in this study provides an update of HyFlex implementation.
Trust Management in Vehicular Ad hoc NETwork
Authors: Abassi Ryma
Published: April 2018

A vehicular ad hoc network (VANET) is a self-organized network that can be formed by connecting vehicles equipped with on-board units. Two types of communications are provided in VANET: vehicular-to-vehicular and vehicular-to-infrastructure. In the first communication type, vehicles communicate directly, whereas in V2I, vehicles communicate through routers called road side units (RSU). Trusted authorities control the network. VANET can be used in several cases. However, the main applications of VANET are oriented to safety issues. In such context, a security problem can have disastrous consequences. In fact, an attacker can be tempted to forward false information in order to obtain some privileges such as road liberation, etc. Hence, evaluating the reliability of transmissions is vital. Trust can be used to promote such healthy collaboration. In fact, trust enables collaborating vehicles to counter their uncertainty and suspicion by establishing trustworthy relationships. The main contribution of this chapter is then the proposition of a trust-based security scheme for VANET.
Network Access Control and Collaborative Security Against APT and AET
Authors: Orhanou Ghizlane , Lakbabi Abdelmajid , Moukafih Nabil , El Hajji Said
Published: April 2018

Cybercrime is rising due to the appearance of a new generation of attacks, APT and AET, and the reactionary aspect of the protection systems implemented in the IP networks. In this chapter, the authors analyze the gap between the innovative aspect of those attacks and the reactive aspect of the security measures put in place inside victim networks. The challenge is to shift this security aspect from reactive to proactive by adopting a collaborative approach based on NAC technology as a multi-level protection and IF-MAP as a security standard exchange protocol. First, a brief overview of NAC and IF-MAP is given. Then, the authors analyze the anatomy of these chained exploits and their escape techniques in order to propose an approach able to counter such attacks through the convergence towards a security ecosystem having the correlative intelligence to respond to challenges in real time and in a proactive way.
Security of Information Exchange Between Readers and Tags
Authors: Kannouf Nabil , Labbi Mohamed , Benabdellah Mohammed , Azizi Abdelmalek
Published: April 2018

RFID (radio frequency identification) systems tend to be one of the most predominant computing technologies due to their low cost and their broad applicability. Latest technologies have brought costs down, and standards are being developed. Now the RFID technology is very important and essential. It is used for innovative applications in personnel services. RFID technology is based on tags, distance and frequency, communication mode, antenna and power transfer, and communication. The attacks are based on the way the RFID systems are communicating and the way that are transferred between the entities of an RFID network (tags, readers). Securing information exchange between readers and tags needs some cryptography methods like symmetric (affine method, block stream method, etc.) or asymmetric (RSA, ECC, etc.) key methods. In this chapter, the authors compare methods based on complexity and power. Then they choose the best for securing communication between RFID tags and RFID readers.
Corporate Supply Chains and the Challenge of Labor Standards
Authors: Nandamuri Purna Prabhakar , Jain Rekh Raj , Gnanamkonda Vijayudu
Published: April 2018

The global manufacturing network facilitates the complex and opaque supply chains, comprising multiple levels of subcontracting which provide an easy scope for modern slavery through unfair labor practices. Global supply chains accommodate around 20% of total workforce. But, it is estimated, at any given moment that approximately three out of every thousand people on the planet are suffering in some form of forced labor, which is more prevalent in the Asia-Pacific region, which accounts for around 56% of the global total. Further, about 90% of the forced labor are exploited in the private economy. However, most of the successful corporates along with the governments understand the need to combat this global menace through strong legislation. The chapter attempts to analyze the major legal provisions of the prevailing labor standards framework in India, along with the pertinent case laws.
Investment on Heat Pumps
Authors: Okay Esin
Published: April 2018

Recent scientific researches show that human influence on climate change due to the use of conventional energy is continuously affecting the world. By all means, conventional energy sources destruct the earth, living standards of environment, and health leading to unnecessary risks and high costs. Therefore, nations focus to find new solutions of renewable energy sources which are clean, healthful, smart, and affordable. This chapter explores one of the new forms of smart energy management systems for heating called “heat pump” and its development in Turkey. Heat pumps offer smart heating solutions for buildings that lower the imported energy costs in the economies. The study shows that as Turkey facing severe financial burdens, major factors still act against the progress of renewable energy investments and energy efficiency solutions. However, efforts to improve energy saving investments like heat pumps could be promising for cheap and smart energy source, if only Turkey sticks to a sound action plan developing public awareness and education.
Lean and Sustainable Warehousing
Authors: Öztürkoğlu Ömer
Published: April 2018

This chapter depicts a picture of sustainable warehousing from the perspective of the time-phased impact of warehouses on economic, environmental, and social dimensions of sustainability. The authors present sustainability issues in warehouses within three levels: macro, meso, and micro. In the macro level, they review the effect of warehouse location and construction on sustainability. In the meso level, they discuss how to deal with warehouse layout problem, the effects of aisle, and material handling equipment choices on sustainability. Last, they briefly present what warehouse managers can do for sustainable warehousing in a short amount of time. Hence, the authors aim to provide a holistic approach to make warehouses sustainable. Last but not the least, they also present supportive and strengthening theoretical and practical studies to resolve barriers in front of sustainable warehousing.
Reverse Logistics and Solid Waste
Authors: Júnior Hermes de Andrade
Published: April 2018

This chapter promotes a selection of works collected that seek to analyze the need and the evolution of reverse logistics into the context of the National Policy on Solid Waste in Brazil. Nineteen years of intensive discussion have been held until the legal framework for the implementation of Agenda 21 of 1992 on the environmentally sound management of solid waste could be announced. The principle of shared responsibility for the product lifecycle, which reaches manufacturers, importers, distributors and traders, consumers, and holders of public solid waste management services, is the central theme of the law and undoubtedly innovates on the issue, placing Brazil alongside countries such as those of the European Union and Japan. However, a serious problem that distances them is to achieve large population densities with the benefit of municipalization of the process of control of urban waste. The rate of effective management of solid wastes is relatively low at the municipal level compared to the countries mentioned.
Sustainability Reporting on Labor Practices
Authors: Seckin-Celik Tutku , Seckin-Halac Duygu
Published: April 2018

The aim of this chapter is to understand what is being reported in sustainability reports, specifically on labor practices. It examines which items, to what extent, are disclosed in sustainability reports with regard to employees. Using GRI guidelines, sustainability reports of Turkish banks are examined. The results of the content analysis show that the most focused indicators are related to workforce composition, training, and education, while the least focused indicators are related to suppliers' labor practices. The authors infer that although organizations are willing to be committed to sustainability, their efforts are still limited. In addition, organizations in the sample seem to be dedicated to sustainability in order to conform to the regulations and reduce risks for investors in this stage.
Formation and Control of Identity
Authors: Sun Christine Yunn-Yu , Goschnick Steve
Published: April 2018

This chapter explores the construction of identity in online communities and websites for social purposes, and its consequences in terms of how one's online identity may be utilized to such an extent that one's real-world identity is either enforced or eroded. It does so by investigating the very nature of identity, coming predominantly from a cultural studies research and philosophical view, although it also cites some related findings and advances in computing and information systems (IS) research. The central argument across the chapter is two-fold: firstly, in promoting an initial shift in focus from the management of online identity to the nature and significance of identity itself whose construction may be conceptualized as a process of sense making and strengthening; and only then, armed with a better understanding of identity, one can focus back upon the management of it more effectively, with a view to the individual taking more control of their own identity within cyberspace, which is increasingly transitioning us all into a functioning global community, in both predictable and unforeseen ways.
Software Vulnerability Management
Authors: Dua Rimsy , Sharma Samiksha , Sharma Abhishek
Published: April 2018

This chapter describes how with the proliferation of internet users, internet-related security threats are also increasing rapidly because of the software vulnerabilities that arise in software. Basically, there are two terms: bug and vulnerability. No doubt, bug and vulnerability are due to programming errors but vulnerabilities are more dangerous than bugs. Software vulnerability is a kind of flaw that arises in software or is a hole in the security of the software that allows an attacker to exploit that flaw. Unlike bugs, software vulnerability can affect a whole network thereby allowing unauthorised access to the database itself. Integrity and confidentiality of the software product is compromised due to the software vulnerability. These flaws must be patched in order to minimalize the impact of software vulnerability on an organisation. This chapter familiarises the methods of managing software vulnerabilities and discusses mitigation of the risks of different vulnerabilities in a software.
Meta-Heuristic Approach for Software Project Risk Schedule Analysis
Authors: Sharma Isha , Chhabra Deepshikha
Published: April 2018

This chapter illustrates a technique to shorten the time duration using structured method. This is done by considering multiple resource constraints apart from time for the software project. The resource constraints are due to limited availability of resources (hardware, software, people, etc.). The difficulty is to locate minimal duration schedule. This is done by assigning the start time for each activity with the clear representation of precedence among them and resources available. There are various optimization approaches available but authors have selected a genetic algorithm. This method emulates the concept of biological evolution that is based on natural selection. This chapter concludes that additional research is needed in this area to provide better outcomes.
Development and Enhancing of Software and Programming Products by Client Information Administration in Market
Authors: Sharma Abhishek , Pawar Lokesh , Kaur Manjot
Published: April 2018

This chapter describes how client information administration (CIA) assumes a vital part in the creation of high-quality programming items or software products. As CIA in enterprise software (ES) advancement is relatively new, this raises inquiries on how CIA empowering agents can be utilized to help ES advancement organizations enhance their product quality. In this study, human, authoritative and mechanical CIA empowering influences were recognized from prior literature. The weights of these elements were dictated by specialists from the ES advancement organizations. In view of the essential factors, a hypothetical model was created. The proposed display was assessed by circulating an overview survey to chiefs in ES advancement organizations. The outcomes demonstrated that “client inclusion” together with “trust” were the most powerful factors, followed by the “CRA innovation framework” and the “cross-useful participation.” The proposed processes demonstrated in this investigation can be utilized as a rule for the use of CIA in ES advancement organizations to enhance product quality.
Use of Software Metrics to Improve the Quality of Software Projects Using Regression Testing
Authors: Sidhu Arshpreet Kaur , Sehra Sumeet Kaur
Published: April 2018

Testing of software is broadly divided into three types i.e., code based, model based and specification based. To find faults at early stage, model based testing can be used in which testing can be started from design phase. Furthermore, in this chapter, to generate new test cases and to ensure the quality of changed software, regression testing is used. Early detection of faults will not only reduce the cost, time and effort of developers but also will help finding risks. We are using structural metrics to check the effect of changes made to software. Finally, the authors suggest identifying metrics and analyze the results using NDepend simulator. If results show deviation from standards then again perform regression testing to improve the quality of software.
Políticas de formação docente: Análise da Constituição Federal e da Lei de Diretrizes e Bases da Educação Nacional
Authors: Gomez Lucas Gabriel Franco , Ramos Lilian Maria Paes de Carvalho
Published: April 2018

Este artigo apresenta parte do resultado final da dissertação de mestrado defendida em maio de 2017 sobre políticas de formação de professores. Consiste em uma análise da Constituição Federal de 1988 e da Lei de Diretrizes e Bases da Educação Nacional de 1996 (LDB), apontando os limites e as possibilidades destes dois dispositivos legais que tiveram grande impacto na formação docente e servem de base para a construção de políticas educacionais até os dias atuais. A Constituição abriu caminho para novas propostas democráticas de formação e valorização dos professores que foram em parte incorporadas pela LDB. No fim, não conseguiram se efetivar por causa da edição de emendas e leis posteiores que reafirmaram as garantias constitucionais e reconheceram os direitos dos professores formalmente, entretanto, questões como planos de carreira, cumprimento do piso salarial, ingresso por concurso público, garantia de formação em nível superior, em pós-graduação, concessão de licença para qualificação e valorização profissional ainda são dilemas enfrentados pelos professores brasileiros.
Programa Mais Educação (PME): visão de professores(as) e diretores(as) de escolas municipais de Caxias do Sul, RS
Authors: Peruzzo Vagner , Souza Diogo Onofre Gomes
Published: April 2018

Este artigo apresenta resultados preliminares de pesquisa acerca do Programa Mais Educação (PME). Objetiva analisar os principais documentos que norteiam a implantação do PME, investigar as contribuições desse Programa nos anos iniciais do ensino fundamental, bem como analisar os resultados dos indicadores de fluxo: taxas de aprovação, reprovação, evasão e o desempenho no Índice de Desenvolvimento da Educação Básica (IDEB) de duas escolas que possuem o PME e os comparar com os de duas escolas da mesma região que não possuem o programa. Foram aplicados questionários a 38 professores dos anos iniciais do ensino fundamental e a dois diretores de duas escolas que aderiram ao PME em 2009, implantaram-no em 2010, mantendo-o de forma ininterrupta até 2015. Os resultados indicam inconsistências nos textos referências do PME e uma clara mudança nos conceitos do programa do documento de 2007 para 2010. Os professores e a direção apontam um melhor rendimento dos estudantes que frequentam o PME quando comparados com os que não frequentam. É possível observar efetiva redução da evasão escolar e tímido aumento no IDEB.
Autofotografia como possibilidade metodológica em pesquisa: o método autofotográfico e as produções de trabalhadoras/es estudantes de duas regiões brasileiras
Authors: Matos Costa França Damiana , Lisboa Franzoi Naira
Published: April 2018

Neste artigo abordamos o método autofotográfico com o objetivo de compreender se e como jovens e adultos estudantes trabalhadoras/es em canaviais, no Nordeste, e na viticultura, no Sul do Brasil se percebem como protagonistas do desenvolvimento de seu município. O método autofotográfico, desenvolvido por Robert Ziller, foi a maneira encontrada para apresentar os olhares, as falas e as construções fotográficas de trabalhadoras e trabalhadores dos municípios de Areia, no estado da Paraíba e Bento Gonçalves, no estado do Rio Grande do Sul. O estudo confirmou o trabalho como convergência entre os participantes da pesquisa, concebido como meio para a concretização dos seus diretos. Acreditamos que a construção de um desenvolvimento socialmente justo precisa ser discutida e realizada com a participação do trabalhador. Mais do que apresentar conclusões acerca do objeto da pesquisa, enfocam-se aqui as potências e os limites da metodologia que pode ser utilizada como uma aliada no contexto das práticas pedagógicas e na pesquisa em educação. A pesquisa se filiou à abordagem qualitativa por entender que a ação humana contempla significações, o que torna essencial o entendimento dos significados subjetivos atribuídos pelos sujeitos que compõem as ações humanas em seus contextos sociais.
Trabalho docente na educação infantil: olhares reflexivos para a ação intencional e planejada do ensino
Authors: Irie Saito Heloisa Toshie , Oliveira Marta Regina Furlan de
Published: April 2018

Neste artigo objetivamos analisar o trabalho docente na educação infantil mediante a ação intencional e planejada do ensino para as crianças entre 0 e 5 anos. Para esse estudo, é necessária a compreensão de como tem sido constituída a rotina pedagógica e o trabalho do professor na educação infantil, tendo como respaldo de análise a Teoria Crítica da Sociedade e a Teoria Histórico-Cultural. A análise é fruto de projetos de pesquisa realizados na Universidade Estadual de Maringá (UEM) e na Universidade Estadual de Londrina (UEL), justificando-se pela necessidade de articularmos pesquisas de diferentes instituições formativas como também de pensarmos o trabalho educacional docente em consonância com fatores sociais, políticos e econômicos que o influenciam. A metodologia de trabalho é de cunho teórico e reflexivo à luz de fundamentos da Teoria Crítica da Sociedade e da Teoria Histórico-Cultural que subsidiam os projetos de pesquisa, possibilitando refletir sobre os desafios para o trabalho docente intencional e planejado em espaços com crianças pequenas. Como resultado, defendemos um trabalho docente na educação infantil que promova aprendizagem e desenvolvimento às crianças com ações sistematizadas e intencionais e uma formação docente inicial e continuada ressignificada, objetivando novos olhares e ações didáticas para uma aprendizagem emancipatória e significativa das crianças.
Um panorama das pesquisas sobre políticas públicas para a inserção de tecnologias digitais na educação
Authors: Echalar Jhonny David , Lima Daniela Da Costa Britto Pereira
Published: April 2018

Este trabalho compõe os estudos e as pesquisas iniciais para o desenvolvimento de uma tese de mesma temática, vinculada ao Programa de Pós-Graduação em Educação (PPGE) da Universidade Federal de Goiás (UFG). A seguinte questão norteou esta revisão de literatura: como estão sendo analisadas as políticas públicas para inserção de tecnologias digitais na educação? O objetivo principal é mapear quais foram e como foram analisadas as políticas públicas para inserção de tecnologias digitais na educação. A pesquisa foi desenvolvida como uma revisão de literatura, tendo sido realizada uma busca em três locais diferentes: na Biblioteca Digital Brasileira de Teses e Dissertações (BDTD), nos Anais dos Simpósios da Associação Nacional de Política e Administração da Educação (Anpae) e também nos Anais das Reuniões Nacionais da Associação Nacional de Pós-Graduação e Pesquisa em Educação (Anped), estabelecendo o recorte temporal que compreende do ano de 2007 a 2016. Os resultados apontam para um interesse das pesquisas em analisar, em âmbito municipal, os efeitos das políticas públicas após sua implementação. Outros resultados mostraram predominância de estudos realizados na região sudeste (35%), seguida da região nordeste (29%) e por instituições públicas de ensino (78%), sendo a maioria desenvolvidos junto a programas de pós-graduação em Educação em dissertações de mestrado (54%).
Práticas pedagógicas do bom professor atuante em Engenharia Civil
Authors: Chiarello Evelin Cristina , Pieczkowski Tania Mara Zancanaro
Published: April 2018

Este texto evidencia uma pesquisa cujo objetivo foi identificar o bom professor de engenharia civil, na perspectiva dos estudantes do curso, e analisar as práticas pedagógicas desses docentes atuantes em uma universidade localizada no oeste do Estado de Santa Catarina. Por meio de entrevistas semiestruturadas, coletamos materialidades empíricas com dez estudantes do último período do curso de engenharia civil, considerando o maior tempo de convívio desses estudantes com a maioria dos professores do curso.  O material coletado foi organizado em categorias de análise, levando em consideração a relevância e a recorrência das narrativas e foi examinado pela perspectiva da Análise de conteúdo com base em Bardin. Concluímos que o considerado bom professor pelos estudantes domina saberes conceituais, atitudinais e procedimentais.
RF Modules (Tx–Rx) with Multifunctional MMICs
Authors: Oppermann Martin , Rieger Ralf
Published: April 2018

Next generation RF sensor modules for multifunction active electronically steered antenna (AESA) systems will need a combination of different operating modes, such as radar, electronic warfare (EW) functionalities and communications/datalinks within the same antenna frontend. They typically operate in C-Band, X-Band and Ku-Band and imply a bandwidth requirement of more than 10 GHz. For the realisation of modern active electronically steered antennas, the transmit/receive (T/R) modules have to match strict geometry demands. A major challenge for these future multifunction RF sensor modules is dictated by the half-wavelength antenna grid spacing, that limits the physical channel width to < 12 mm or even less, depending on the highest frequency of operation with accordant beam pointing requirements. A promising solution to overcome these geometry demands is the reduction of the total monolithic microwave integrated circuit (MMIC) chip area, achieved by integrating individual RF functionalities, which are commonly achieved through individual integrated circuits (ICs), into new multifunctional (MFC) MMICs. Various concepts, some of them already implemented, towards next generation RF sensor modules will be discussed and explained in this work.
Does the Baltic Dry Index predict economic activity in South Africa? A review from 1985 to 2016
Authors: Sartorius Kurt , Sartorius Benn , Zuccollo Dino
Published: April 2018

Background: The ability of the Baltic Dry Index to predict economic activity has been evaluated in a number of developed and developing countries. Aim: Firstly, the article determines the primary factors driving the dynamics of the Baltic Dry Index (BDI) and, secondly, whether the BDI can predict future share price reactions on the Johannesburg Stock Exchange All Share Index (JSE ALSI), South Africa. Setting: This article investigates the dynamics and predictive properties of the BDI in South Africa between 1985 and 2016. Methods: The article uses a review of a wide range of published data and two time-series data sets to adopt a mixed methods approach. An inductive contents analysis is used to answer the first research question and a combination of a unit root test, correlation analysis and a Granger causality model is employed to test the second research question. Results: The results show that the BDI price is primarily driven by four underlying constructs that include the supply and demand for dry bulk shipping, as well as risk, cost and logistics management factors. Secondly, the results indicate a break in the BDI data set in July 2008 that influences a fundamental change in its relationship with the JSE ALSI index. In the pre-break period (1985 to 2008), the BDI is positively correlated with the ALSI (0.837, α = 0.05) before sharply diverging in the second period from August 2008 to 2016. In the first period, the BDI showed an optimal lag period of 6 months as a predictor of the ALSI index, but this predictive ability ceases after July 2008. The article makes a two-part contribution. Firstly, it demonstrates that the BDI is a useful predictor of future economic activity in an African developing country. Secondly, the BDI can be incorporated in government and industry sector planning models as a variable to assess future gross domestic product trends. Conclusion: The study confirms that the BDI is only a reliable indicator of future economic activity when the supply of shipping capacity is well matched with the demand.
The association between emotional intelligence and entrepreneurship as a career choice: A study on university students in South Africa
Authors: Kanonuhwa Michelle , Rungani Ellen C. , Chimucheka Tendai
Published: April 2018

Orientation: To examine the effects of emotional intelligence on the development of entrepreneurial intentions of university students.Research purpose: To determine whether emotional intelligence is a crucial antecedent of entrepreneurial intention to encourage entrepreneurial behaviour.Motivation of the study: By identifying all the factors that encourage entrepreneurial behaviour, policymakers and concerned stakeholders are better equipped to improve such behaviour and guarantee its success, thereby alleviating unemployment more effectively.Research design, approach and method: A positivist paradigm was used and a quantitative design used self-administered questionnaires to assess the respondents’ emotional intelligence and their intentions to start businesses. Multiple regressions and correlations were computed to test the hypotheses.Main findings: The findings revealed that there is a direct association between emotional intelligence and entrepreneurial intention, with the strongest association recorded between regulation of emotion and entrepreneurial intention and the least significant association between use of emotion and entrepreneurial intention.Practical implications: Although entrepreneurship education is important, it needs to be restructured to incorporate the practical aspects. Furthermore, educators should create a learning environment that could encourage the effective expression and use of emotions to nurture emotional intelligence.Contribution: This article is of particular value to policymakers and educators looking for ways to improve entrepreneurial effectiveness and implementation as well as scholars contemplating entrepreneurship as a career option.
Inverse Scattering at Fixed Energy on Three-Dimensional Asymptotically Hyperbolic Stäckel Manifolds
Authors: Gobin Damien
Published: April 2018

In this paper, we study an inverse scattering problem at fixed energy on three-dimensional asymptotically hyperbolic Stäckel manifolds having the topology of toric cylinders and satisfying the Robertson condition. On these manifolds the Helmholtz equation can be separated into a system of a radial ODE and two angular ODEs. We can thus decompose the full scattering operator into generalized harmonics and the resulting partial scattering matrices consist of a countable set of

2 \times 2

matrices whose coefficients are the so-called transmission and reflection coefficients. It is shown that the reflection coefficients are nothing but generalized Weyl–Titchmarsh functions associated with the radial ODE. Using a novel multivariable version of the Complex Angular Momentum method, we show that the knowledge of the scattering operator at a fixed non-zero energy is enough to determine uniquely the metric of the three-dimensional Stäckel manifold up to natural obstructions.
Isolement de moraxella chez l’animal
Authors: Saint Aubert G. de , Toma Bernard , Le Cam J. , Migliore M.
Published: April 2018

Cinquante-six souches de moraxelles ont été isolées chez diverses espèces animales : bovins, ovins, caprins, porc, chien et ragondin, soit 27 Moraxella duplex, 26 Moraxella Iwoffi et 3 Moraxella gluci-dolytica.

A partir de cas de kérato-conjonctivite contagieuse des bovins nous n’avons pas rencontré M. bovis mais d’autres Moraxelles et Neisseria ovis.

Ces résultats fragmentaires ne concernent que deux laboratoires. Ils posent, nous semble-t-il, le problème du rôle de Moraxella en pathologie animale.

Il serait souhaitable que d’autres laboratoires fassent part de leur expérience en ce domaine.
Infection grave à Moraxella glucidolytica chez un Chat (aperçu du rôle pathogène des moraxella en Polynésie française)
Authors: Jacober F. , Segonne Jean , Bernard F.
Published: April 2018

A l’occasion d’un cas très démonstratif de péritonite subaiguë à Moraxella glucidolytica chez un Chat, ont été étudiées les infections humaines relativement nombreuses dues au même germe en Polynésie Française.

En raison du parallélisme de ces infections chez l’homme et chez l’animal, on peut évoquer l’hypothèse d’interférences entre la maladie animale et la maladie humaine et le rôle possible des animaux dans la diffusion du germe.
Substance use disorder—substance-induced disorder clinics for pain-medication addictions and addicted patients’ pains: Futuristic need for pain physicians sub-specializing in addiction-medicine
Authors: Gupta, MD DeepaK , Chakrabortty, MD, PhD Shushovan
Published: April 2018

no abstract
Oxycodone/naloxone in postoperative pain management of surgical patients
Authors: Gkegkes, MD, PhD Ioannis D. , Minis, MD Evelyn Eleni , Iavazzo, MD, MSc, PhD Christos
Published: April 2018

Background: The role of analgesia is crucial in the management of postoperative pain. Different combinations of oral analgesics have been proposed in the past. The oxycodone/naloxone (OXN) combination is a recent addition and is being used by different surgical specialties. The aim of our study was to clarify the possible role, advantages, and disadvantages of OXN in the pain management of surgical patients.Method: The authors retrieved the included studies after performing a systematic search in PubMed and Scopus.Results: Ten studies (six randomized controlled trials, three retrospective studies, and a prospective study) were eligible for inclusion in this review. In total, 1,996 patients were included. Six studies reported on orthopedic procedures while four studies referred to colorectal, gynecologic, cardiac, and thoracic surgery procedures, respectively. The analgesic effect of OXN was evaluated in nine out of 10 studies, where OXN showed superiority only in two out of nine studies. Postoperative bowel function was evaluated in seven out of 10 studies. Patients treated with OXN did not show any significant differences in bowel function when compared to control groups. No superiority was found regarding the possible adverse events.Conclusion: Analgesia is crucial to postoperative recovery. Pain control can be achieved a combination of different analgesics, including OXN. This oral analgesic combination can have the potential to minimize side effects, such as opioid-induced constipation and optimize the recovery period.
Wintertime hygroscopicity and volatility of ambient urban aerosol particles
Authors: Enroth Joonas , Mikkilä Jyri , Németh Zoltán , Kulmala Markku , Salma Imre
Published: April 2018

Abstract. Hygroscopic and volatile properties of atmospheric aerosol
particles with dry diameters of (20), 50, 75, 110 and 145 nm were determined
in situ by using a volatility–hygroscopicity tandem differential mobility analyser (VH-TDMA)
system with a relative humidity of 90 % and
denuding temperature of 270 ∘C in central Budapest during 2
months in winter 2014–2015. The probability density function of the
hygroscopic growth factor (HGF) showed a distinct bimodal distribution. One
of the modes was characterised by an overall mean HGF of approximately 1.07
(this corresponds to a hygroscopicity parameter κ of 0.033)
independently of the particle size and was assigned to nearly hydrophobic (NH)
particles. Its mean particle number fraction was large, and it
decreased monotonically from 69 to 41 % with particle diameter. The other
mode showed a mean HGF increasing slightly from 1.31 to 1.38 (κ values
from 0.186 to 0.196) with particle diameter, and it was attributed to
less hygroscopic (LH) particles. The mode with more hygroscopic particles
was not identified. The probability density function of the volatility GF (VGF)
also exhibited a distinct bimodal distribution with an overall mean
VGF of approximately 0.96 independently of the particle size, and with
another mean VGF increasing from 0.49 to 0.55 with particle diameter. The
two modes were associated with less volatile (LV) and volatile (V) particles.
The mean particle number fraction for the LV mode decreased from 34 to
21 % with particle diameter. The bimodal distributions indicated that the
urban atmospheric aerosol contained an external mixture of particles with a
diverse chemical composition. Particles corresponding to the NH and LV modes
were assigned mainly to freshly emitted combustion particles, more
specifically to vehicle emissions consisting of large mass fractions of soot
likely coated with or containing some water-insoluble organic compounds such
as non-hygroscopic hydrocarbon-like organics. The hygroscopic particles were
ordinarily volatile. They could be composed of moderately transformed aged
combustion particles consisting of partly oxygenated organics, inorganic
salts and soot. The larger particles contained internally mixed non-volatile
chemical species as a refractory residual in 20–25 % of the aerosol material (by volume).
Substrate potential of last interglacial to Holocene permafrost organic matter for future microbial greenhouse gas production
Authors: Stapel Janina G. , Schwamborn Georg , Schirrmeister Lutz , Horsfield Brian , Mangelsdorf Kai
Published: April 2018

Abstract. In this study the organic matter (OM) in several permafrost cores from
Bol'shoy Lyakhovsky Island in NE Siberia was investigated. In
the context of the observed global warming the aim was to evaluate the potential
of freeze-locked OM from different depositional ages to act as a substrate
provider for microbial production of greenhouse gases from thawing
permafrost. To assess this potential, the concentrations of free and bound
acetate, which form an appropriate substrate for methanogenesis, were
determined. The largest free-acetate (in pore water) and bound-acetate
(organic-matrix-linked) substrate pools were present in interstadial
marine isotope stage (MIS) 3 and stadial MIS 4 Yedoma permafrost deposits. In
contrast, deposits from the last interglacial MIS 5e (Eemian) contained only
a small pool of substrates. The Holocene (MIS 1) deposits revealed a
significant bound-acetate pool, representing a future substrate potential
upon release during OM degradation. Additionally, pyrolysis experiments on
the OM allocated an increased aliphatic character to the MIS 3 and 4 Late
Pleistocene deposits, which might indicate less decomposed and presumably
more easily degradable OM. Biomarkers for past microbial communities,
including those for methanogenic archaea, also showed the highest abundance
during MIS 3 and 4, which indicated OM-stimulated microbial degradation and
presumably greenhouse gas production during time of deposition. On a broader
perspective, Arctic warming will increase and deepen permafrost thaw and
favor substrate availability from older freeze-locked permafrost deposits.
Thus, the Yedoma deposits especially showed a high potential for providing
substrates relevant for microbial greenhouse gas production.
Contrasting biosphere responses to hydrometeorological extremes: revisiting the 2010 western Russian Heatwave
Authors: Flach Milan , Sippel Sebastian , Gans Fabian , Bastos Ana , Brenning Alexander , Reichstein Markus , Mahecha Miguel D.
Published: April 2018

Abstract. Combined droughts and heatwaves are among those compound extreme events that induce severe impacts on the terrestrial biosphere and human health. A record breaking hot and dry compound event hit western Russia in summer 2010 (Russian heatwave, RHW). Events of this kind are typically studied either from a hydrometeorological perspective, or with a focus on impacts in the terrestrial biosphere such as reductions of the terrestrial carbon storage. These different perspectives might not only require different strategies for event detection, but also change interpretations and impact assessment. To exemplify this issue, we revisit the RHW both from a biospheric and a hydrometeorological perspective. We consider several hydrometeorological and biospheric variables agnostically as inputs to a recently developed multivariate anomaly detection approach. Our analysis of biospheric variables reveals that the RHW was preceded by increased gross ecosystem production in spring that partly compensated the reduced summer production, but remained unconsidered in earlier impact oriented studies. We also find that the region of reduced summer ecosystem production does not match the area identified as extreme in the hydrometeorological variables. The reason is that forest-dominated ecosystems in the higher latitudes respond with unusually high productivity to the RHW, leading overall to a compensation of 54 % (36 % in spring, 18 % in summer) of the reduced gross primary production (GPP) in southern agriculturally dominated ecosystems. Our results show that an ecosystem-specific and multivariate perspective on extreme events can reveal multiple facets of extreme events by simultaneously integrating several data streams irrespective of impact direction and the variables’ domain (here "biosphere" or "hydrometeorology"). Focusing on negative impacts in specific variables e.g. a vegetation index, leads to a spatiotemporally delineation of extreme events that is inconsistent with the hydrometeorological conditions and and can limit the interpretation of their impacts on the terrestrial biosphere. Our study exemplifies the need for robust multivariate analytic approaches to detect extreme events in both hydrometeorological conditions and associated biosphere responses to fully characterize the effects of extremes, including possible compensatory effects in space and time.
Hydrological assessment of atmospheric forcing uncertainty in the Euro-Mediterranean area using a land surface model
Authors: Gelati Emiliano , Decharme Bertrand , Calvet Jean-Christophe , Minvielle Marie , Polcher Jan , Fairbairn David , Weedon Graham P.
Published: April 2018

Abstract. Physically consistent descriptions of land surface hydrology are
crucial for planning human activities that involve freshwater resources,
especially in light of the expected climate change scenarios. We assess how
atmospheric forcing data uncertainties affect land surface model (LSM)
simulations by means of an extensive evaluation exercise using a number of
state-of-the-art remote sensing and station-based datasets. For this
purpose, we use the CO2-responsive ISBA-A-gs LSM coupled with the CNRM version of
the Total Runoff Integrated Pathways (CTRIP) river routing model. We perform
multi-forcing simulations over the Euro-Mediterranean area (25–75.5∘ N, 11.5∘ W–62.5∘ E,
at 0.5∘ resolution) from 1979 to 2012. The model is forced using four atmospheric
datasets. Three of them are based on the ERA-Interim reanalysis (ERA-I). The
fourth dataset is independent from ERA-Interim: PGF, developed at Princeton
University. The hydrological impacts of atmospheric forcing uncertainties
are assessed by comparing simulated surface soil moisture (SSM), leaf area
index (LAI) and river discharge against observation-based datasets: SSM from
the European Space Agency's Water Cycle Multi-mission Observation Strategy
and Climate Change Initiative projects (ESA-CCI), LAI of the Global
Inventory Modeling and Mapping Studies (GIMMS), and Global Runoff Data
Centre (GRDC) river discharge. The atmospheric forcing data are also
compared to reference datasets. Precipitation is the most uncertain forcing
variable across datasets, while the most consistent are air temperature and
SW and LW radiation. At the monthly timescale, SSM and LAI simulations are
relatively insensitive to forcing uncertainties. Some discrepancies with
ESA-CCI appear to be forcing-independent and may be due to different
assumptions underlying the LSM and the remote sensing retrieval algorithm.
All simulations overestimate average summer and early-autumn LAI. Forcing
uncertainty impacts on simulated river discharge are larger on mean values
and standard deviations than on correlations with GRDC data. Anomaly
correlation coefficients are not inferior to those computed from raw monthly
discharge time series, indicating that the model reproduces inter-annual
variability fairly well. However, simulated river discharge time series
generally feature larger variability compared to measurements. They also
tend to overestimate winter–spring high flows and underestimate
summer–autumn low flows. Considering that several differences emerge between
simulations and reference data, which may not be completely explained by
forcing uncertainty, we suggest several research directions. These range
from further investigating the discrepancies between LSMs and remote sensing
retrievals to developing new model components to represent physical and
anthropogenic processes.
Homogenous static magnetic field coils dedicated to portable nuclear magnetic resonance for agronomic studies
Authors: Sidi-Boulenouar Rahima , Reis Ariston , Nativel Eric , Buy Simon , de Pellegars Pauline , Liu Pan , Zanca Michel , Goze-Bac Christophe , Barbat Jérome , Alibert Eric , Verdeil Jean-Luc , Gatineau Frédéric , Bertin Nadia , Anand Atma , Coillot Christophe
Published: April 2018

Abstract. Nuclear magnetic resonance (NMR) experiments are usually carried
out at very high and homogenous magnetic fields. However, portable systems
have emerged in recent years at low fields, offering many advantages like
easier maintenance and open design that permit us to imagine a variety of
coil configurations in order to maximize the homogeneity of the static field
B0 and the radio-frequency field B1. The wire winding distribution
based on space harmonics suppression (SHS) of the cosine current density
distribution offers new possibilities of producing homogenous static fields
B0. In this work, an extension of the SHS method, allowing homogeneity
enhancement and flexibility of the coil design, is presented. The efficiency
of the method is demonstrated through the construction of homogenous magnetic
field coils dedicated to a very low magnetic field (8 mT) 1H NMR
spectrometer. The performance of these coils in terms of magnetic field
intensity and homogeneity as well as self-heating behavior is compliant with
in planta experiments for agronomic studies.
ERGOTERAPIJOS UŽSIĖMIMŲ EFEKTYVUMAS VAIKŲ,
SERGANČIŲ ŪMINE LIMFOBLASTINE LEUKEMIJA,
KASDIENEI VEIKLAI IR GYVENIMO KOKYBEI
Authors: Blaževičius Justinas , Šidlauskienė Aurelija
Published: April 2018

Lietuvoje, kaip ir kitose šalyse, vaikai dažniausiai
serga ūminėmis limfoblastinėmis leukemijomis
(ŪLL) ir centrinės nervų sistemos navikais. Onkohematologinių
ligų gydymas chemoterapija dažnai
sukelia šalutinius poveikius, kurie gali tiesiogiai paveikti
vaikų gyvenimo kokybės sumažėjimą. Dėl chemoterapijos
sukeltų neigiamų šalutinių poveikių, sumažėjusios
bendros raumenų jėgos, pasireiškiančių
skausmingų dizestezijų, sensorinių sutrikimų, giliųjų
sausgyslių susilpnėjimo, balanso ir kordinacijos sutrikimų
vaikas nebegali visavertiškai dalyvauti sporto
veiklose. Ergoterapijos užsiėmimai padeda vaikams
pilnavertiškai dalyvauti kasdieninėse veiklose, kurių
dėka gerinama fizinė bei psichinė būklė. Ergoterapijos
intervencijos pagrindinis tikslas – gyvenimo kokybės
gerinimas. Gyvenimo kokybės pablogėjimas
gali turėti įtakos veiklų disbalansui. Iš viso tyrime
dalyvavo 54 pacientai, sergantys ūmine limfoblastine
leukemija. Visiems tiriamiesiems buvo atlikta
15 ergoterapijos procedūrų. Tyrimo metu buvo vertinami
šie kriterijai: skausmas, nuovargis, nerimas,
gyvenimo kokybė, dinamometrija, psichologinė būklė.
Taikant ergoterapijos užsiėmimų procedūras nustatytas
statistiškai reikšmingas pagerėjimas visose
amžiaus grupėse, vaikai geriau įvertino savo gyvenimo
kokybę. Nustatyta, kad ergoterapijos užsiėmimai
turėjo statistiškai reikšmingą įtaką vaikų dinamometrijos
rezultatams.