bluuebunny/crossref_metadata_2025 huggingface dataset:
Understanding Relationship Marketing and Loyalty Program Effectiveness in Global Markets
Authors: Beck Joshua T. , Chapman Kelly , Palmatier Robert W.
Published: July 2015

Relationship marketing (RM) and loyalty programs (LPs) are key differentiation strategies for firms facing increasing global competition. Accordingly, global interest in RM and LPs has surged, though researchers examining these marketing activities typically apply U.S.-centric frameworks to international research contexts. To understand how RM and LPs may be influenced by factors that distinguish global markets, this review offers a comprehensive framework of both RM and LP mechanisms and considers how cultural and developmental contingency factors may alter the effects of these mechanisms on seller performance. The results from this review produce eight propositions about where specific RM and LP strategies should be most effective. By considering these mechanisms jointly, the authors also simultaneously delineate RM and LP theories and broaden the scope of global research in both domains.
Modeling Heterogeneity in the Satisfaction, Loyalty Intention, and Shareholder Value Linkage: A Cross-Industry Analysis at the Customer and Firm Levels
Authors: Larivière Bart , Keiningham Timothy L. , Aksoy Lerzan , Yalçin Atakan , Morgeson Forrest V. , Mithas Sunil
Published: July 2015

This study examines the relationship between customer satisfaction, loyalty intention, and shareholder value at the firm and individual customer levels. The authors also explore industry differences by using a multilevel and random-effects approach in which individual customer scores are nested within firm-level data and the estimated interrelationships are treated as random coefficients that are explained by industry characteristics. They compile a unique and detailed data set, which covers 10 years of information on 137 firms and includes a matched sample of 189,069 customers from multiple sources, such as the American Customer Satisfaction Index, the Center for Research in Security Prices, and Compustat, to yield three important insights. First, aggregate firm-level effects may overestimate the impact that satisfaction has at the individual customer level. Second, a consideration of loyalty intention or repurchase intention as the mediator can improve our understanding of the satisfaction–shareholder value relationship and the fact that this relationship can vary across firms. Finally, the influence of satisfaction and loyalty intentions on shareholder value varies by industry. The authors discuss implications of findings for researchers, managers, and investors.
Understanding the Dynamics between Social Entrepreneurship and Inclusive Growth in Subsistence Marketplaces
Authors: Azmat Fara , Ferdous Ahmed Shahriar , Couchman Paul
Published: July 2015

This article explores how social entrepreneurs utilize their unique circumstances and resources at a micro level to facilitate the creation of shared value at the meso level, leading to inclusive growth at a macro level in the context of subsistence marketplaces. Drawing from explanatory case studies of two social enterprises—Waste Concern (Bangladesh) and Seven Women (Nepal)—the findings suggest that social entrepreneurs act as bricoleurs to integrate their operant and operand resources in subsistence marketplaces to facilitate inclusive growth. The authors further connect with and extend three discourses of research—social entrepreneurship, social bricolage, and service-dominant logic—to develop a framework providing insights into the “bottom-up” approach, the underlying dynamics of shared value creation, and inclusive growth in subsistence marketplaces by social entrepreneurs. The findings also strengthen Dees's (2001) definition of social entrepreneurship, confirming its applicability and relevance in subsistence marketplaces and further extending the theory of social bricolage. The authors discuss the implications of these findings, including tactical interventions aimed at providing better understanding of how social entrepreneurs create value in resource-constrained marketplaces, from a bottom-up perspective.
Tumor-induced osteomalacia due to a recurrent mesenchymal tumor overexpressing several growth factor receptors
Authors: Yavropoulou Maria P , Gerothanasi Nikolina , Frydas Athanasios , Triantafyllou Evangelia , Poulios Chris , Hytiroglou Prodromos , Apostolou Panagiotis , Papasotiriou Ioannis , Tournis Symeon , Kesisoglou Isaak , Yovos John G
Published: July 2015

Tumor-induced osteomalacia (TIO) is a rare paraneoplastic syndrome caused primarily by benign mesenchymal tumors. These tumors typically follow a benign clinical course and local recurrence occurs in <5% of cases. We investigated a 49-year-old man with a recurrent mesenchymal phosphaturic tumor showing no signs of malignancy. The patient suffered from chronic muscle weakness, myalgia and cramps. His medical record included the diagnosis of oncogenic osteomalacia, for which he was submitted to tumor resection in the left leg three times before. Laboratory examination showed hypophosphatemia, hyperphosphaturia and an elevated serum FGF23 level. A radical surgical approach (amputation) was advised, however, complete biochemical and clinical remission was not reached. Molecular analysis of the tumor cells demonstrated overexpression of growth factor receptors implicated in tumor angiogenesis and metastatic potential (platelet derived growth factor type A (PDGFRA), PDGFRB and vascular endothelial growth factor receptor) together with increased expression of FGF23, x-linked-phosphate-regulating endopeptidase and KLOTHO. TIO is usually associated with benign phosphauturic tumors and, when identified, resection of the tumor leads to complete remission in the majority of cases. The underlying pathophysiology of recurrences in these tumors is not known. This is the first report showing increased expression of growth factor receptors in a locally aggressive but histopathologically benign phosphaturic mesenchymal tumor.

Learning points

TIO is usually associated with benign soft tissue or bone neoplasms of mesenchymal origin.

These tumors typically follow a benign clinical course and even in the rare malignant cases local recurrence occurs in <5%.

Successful identification and removal of the tumor leads to full recovery in the majority of cases.
How Well Do Molecular and Pedigree Relatedness Correspond, in Populations with Diverse Mating Systems, and Various Types and Quantities of Molecular and Demographic Data?
Authors: Kopps Anna M , Kang Jungkoo , Sherwin William B , Palsbøll Per J
Published: July 2015

Kinship analyses are important pillars of ecological and conservation genetic studies with potentially far-reaching implications. There is a need for power analyses that address a range of possible relationships. Nevertheless, such analyses are rarely applied, and studies that use genetic-data-based-kinship inference often ignore the influence of intrinsic population characteristics. We investigated 11 questions regarding the correct classification rate of dyads to relatedness categories (relatedness category assignments; RCA) using an individual-based model with realistic life history parameters. We investigated the effects of the number of genetic markers; marker type (microsatellite, single nucleotide polymorphism SNP, or both); minor allele frequency; typing error; mating system; and the number of overlapping generations under different demographic conditions. We found that (i) an increasing number of genetic markers increased the correct classification rate of the RCA so that up to >80% first cousins can be correctly assigned; (ii) the minimum number of genetic markers required for assignments with 80 and 95% correct classifications differed between relatedness categories, mating systems, and the number of overlapping generations; (iii) the correct classification rate was improved by adding additional relatedness categories and age and mitochondrial DNA data; and (iv) a combination of microsatellite and single-nucleotide polymorphism data increased the correct classification rate if <800 SNP loci were available. This study shows how intrinsic population characteristics, such as mating system and the number of overlapping generations, life history traits, and genetic marker characteristics, can influence the correct classification rate of an RCA study. Therefore, species-specific power analyses are essential for empirical studies.
Space Technologies in Agri-Environmental Monitoring System
Authors: Petrychenko V. , Tarariko O. , Syrotenko O.
Published: July 2015

The contemporary development of the remote space survey syst ems and elements of geoinformation t echnolo gies o ffers the fundamentally new possibilities of control, forecasting and interpretation of the data obtained from agroecological monitoring. Aim. To describe natural and climatic conditions of the various zones within the territory of Ukraine, its agricultural acquirement and risk of the soils’ erosive degradation manifestations in the meaning of climate changes. To determine the factors infl uencing upon the spectral characteristics of the eroded soils for their identifi cation, deciphering, and also the cultivated lands and land tenure systems degradatio n monitoring according to satellite data. Methods. The logical model of water erosion determination and identifi cation according to the data of the Earth remote sensing (ERS) of high spatial resolution is developed on the basis of classifi cation in basic deciphering signs and the procedure of molding of the training samples forming. The materials
of the Landsat 8, SPOT, ASTER and RapidEye space surveys, map materials and data of full-scale ground observations on the test objects were used for identifi cation of the processes of sheet and linear erosion. The soil erosion was determined according to two approaches. The fi rst one is based on the plowed soil and the second – on soil covered with plants. The soil erosion class was determined according to the spectral characteristics and humus content, while gully rate – by reference to gullies’ length and square. Results. The humus content in so il was proposed to be determined according to the spatial distribution of spectral characteristics within the limits of uniform regions and corresponding mathematical-statistical models. The opportunities of linear and sheet erosion classifi cation according to the ERS data, and also their use in the system of monitoring and evaluating the ecological state of agrolandscapes and land tenure systems are shown. C onclus ions. The space mo nitoring data of the soils
erosive degradation and agrolandscapes in whole provide the opportunity of more effective use of soil resources due to the strategic determination of degradation processes with the subsequent planning and workout the measures for th e optimization of the erosive dangerous agrolandscapes structure, and also introduction of the ground water-guarding systems of soil management.
Genetic Structure’s Investigation of the Ukrainian Population of the Polish Red Breed Cattle by Quantitative Trait Loci
Authors: Dobrianska M. , Jaschuk T. , Dzhus P. , Kopylova K. , Zhukorskyi O. , Kopylov K.
Published: July 2015

Aim. To investigate the genetic structure of the Polish Red breed cattle population that is being reproduced in Ukraine by 5 genes participating in the formation of qualitative and quantitative performance indicators of cattle. Methods. Defi nition of individual genotypes of the animals was performed using polymerase chain reaction (PCR) followed by determination of restriction fragment length polymorphism (RFLP analysis). Results. The high frequency of desirable alleles in the genes of kappa-casein and beta-lactoglobulin has been reported for the investigated population. Conclusions. The signifi cant genetic potential of the Polish Red breed cattle by milk production was stated.
Changes in the Population Density of Pathogenic Microorganisms in Response to the Allelopathic Effect of Thypha Latifolia
Authors: Zhukorskiy O. , Gulay O. , Gulay V. , Tkachuk N.
Published: July 2015

Aim. To determine the response of the populations of Erysipelothrix rhusiopathiae and Leptospira interrogans pathogenic microorganisms to the impact of broadleaf cattail (Thypha latifolia) root diffusates. Methods. Aqueous solutions of T. latifolia root diffusates were sterilized by vacuum fi ltration through the fi lters with 0.2-micron pore diameter. The experimental samples contained cattail secretions, sterile water, and cultures of E. rhusiopathiae or L. interrogans. The same amount of sterile water, as in the experimental samples, was used for the purpose of control, and the same quantity of microbial cultures was added in it. After exposure, the density of cells in the experimental and control samples was determined. Results. Root diffusates of T. latifolia caused an increase in cell density in the populations of E. rhusiopathiae throughout the whole range of the studied dilutions (1:10–1:10000). In the populations of the 6 studied serological variants of L. interrogans spirochetes (pomona,
grippotyphosa, copenhageni, kabura, tarassovi, canicola), the action of broadleaf cattail root diffusates caused the decrease in cell density. A stimulatory effect was marked in the experimental samples of the pollonica serological variant of leptospira. Conclusions. The populations of E. rhusiopathiae and L. interrogans pathogenic microorganisms respond to the allelopathic effect of Thypha latifolia by changing the cell density. The obtained results provide the background to assume that broadleaf cattail thickets create favorable conditions for the existence of E. rhusiopathiae pathogen bacteria. The reduced cell density of L. interrogans in the experimental samples compared to the control samples observed under the infl uence of T. latifolia root diffusates suggests that reservoirs with broadleaf cattail thickets are marked by the unfavorable conditions for the existence of pathogenic leptospira (except L. pollonica).
Vitamin D Provision in High-Yield Dairy Cows During the Winter Housing Period
Authors: Yuskiv L. , Vlizlo V.
Published: July 2015

Aim. To investigate the vitamin D status in highly productive cows during winter housing period and effect of cholecalciferol by various ways of vitamin D 3 injection to cows in last days of gestation and after calving. Methods. Enzyme-linked immunoassay, spectrophotometry. Results. It has been stated that intramuscular injection of cholecalciferol into cows caused increase of the vitamin D 3 active metabolite – 25-OHD 3 , calcium, phosphorus and magnesium levels together with decrease of alkaline phosphatase level in pre- and post-natal periods. Oral supplementation makes little infl uence on the studied blood parameters of cows. Conclusions. Extrabuccal administration and oral supplementation of cholecalciferol in winter housing period to high-yield cows in the last days of gestation and after calving is accompanied by increased levels of its metabolites and their effect on mineral metabolism in the postnatal period. The nature of these changes depends on the mode of vitamin D administration and the
physiological state of the cows.
Comparative Effi ciency of Countermeasures in Agriculture at the Radionuclide-Contaminated Territories
Authors: Gudkov I.
Published: July 2015

The effi ciency of various countermeasures (radioprotective measures) in agricultural production at the radionuclide-contaminated territories after the radiation accidents in the South Ural, at the Chernobyl NPP and NPP Fukushima I are compared. The infl uence of these accidents on the decreasing of radionuclides uptake and accumulation in plant-breading and animal-breeding products, and consequently, on internal radiation dose for the human being due to foodstuffs varies in different conditions and mainly depends on radionuclide composition of contamination, soil type and manufacturing profi le of production.
Experimental Study of the Impact of Alisma plantago-aquatica Secretions on Pathogenic Bacteria
Authors: Zhukorskyy O. , Hulay O.
Published: July 2015

Aim. To estimate the impact of in vivo secretions of water plantain (Alisma plantago-aquatica) on the popula- tions of pathogenic bacteria Erysipelothrix rhusiopathiae. Methods. The plants were isolated from their natural conditions, the roots were washed from the substrate residues and cultivated in laboratory conditions for 10 days to heal the damage. Then the water was changed; seven days later the selected samples were sterilized using fi lters with 0.2 μm pore diameter. The dilution of water plantain root diffusates in the experimental samples was 1:10–1:10,000. The initial density of E. rhusiopathiae bacteria populations was the same for both experimental and control samples. The estimation of the results was conducted 48 hours later. Results. When the dilution of root diffusates was 1:10, the density of erysipelothrixes in the experimental samples was 11.26 times higher than that of the control, on average, the dilution of 1:100 − 6.16 times higher, 1:1000 – 3.22 times higher, 1:10,000 – 1.81 times
higher, respectively. Conclusions. The plants of A. plantago-aquatica species are capable of affecting the populations of E. rhusiopathiae pathogenic bacteria via the secretion of biologically active substances into the environment. The consequences of this interaction are positive for the abovementioned bacteria, which is demon- strated by the increase in the density of their populations in the experiment compared to the control. The intensity of the stimulating effect on the populations of E. rhusiopathiae in the root diffusates of A. plantago-aquatica is re- ciprocally dependent on the degree of their dilution. The investigated impact of water plantain on erysipelothrixes should be related to the topical type of biocenotic connections, the formation of which between the test species in the ecosystems might promote maintaining the potential of natural focus of rabies. Keywords: Alisma plantago-aquatica, in vivo secretions, Erysipelothrix rhusiopathiae, population density, topical type of connections.
Orientation of nitrogen transformation processes in the soil with corn growing under the different fertilization practices
Authors: Volkogon V. , Berdnikov O. , Dimova S. , Volkogon M.
Published: July 2015

Aim. To explore the peculiarities of nitrogen transformation in sod-podzolic soils with corn growing under dif- ferent fertilizer types and the effect of bacterization. Methods. Agrochemical, fi eld and lyzimetric, chromato- graphic determination of nitrogen fi xation activity and emission of N 2 O. Results. The highest losses of nitrogen from the soil occurred in the variants with manure application and use of mineral fertilizers N 90 P 90 K 90 . The processes of nitrogen transformation in soil and corn yield were optimized using the combination of mineral fertilizers with green manure and microbial agent. Conclusions. The application of fertilizers for corn grow- ing on sod-podzolic soils of Polissya region should be accompanied with the use of green manures. The use of microbial preparations is recommended.
Development of highly pathogenic avian infl uenza and Newcastle disease surveillance means on the basis of molecular and genetic techniques
Authors: Stegniy B. , Gerilovych A. , Stegniy A.
Published: July 2015

Highly pathogenic avian infl uenza and Newcastle disease pose considerable danger to the countries with de- veloped poultry farming, especially in the circumstances of current complicated worldwide epizootic situation regarding these diseases. Aim. This study is aimed at creating a system of methods to identify RNA of infl u- enza and Newcastle disease viruses on the basis of PCR. Methods. The methods of molecular diagnostics and bioinformatics were used. Results. The system of primers and the methodology for the identifi cation of RNA of infl uenza A virus (for the M-gene), highly pathogenic avian influenza virus subtype H5N1 in HA and NA genes, Newcastle disease virus with the amplifi cation of highly variable region gene of F have been elaborated. Conclusions. The elaborated techniques proved to be effective in the study of both reference and field samples.
Wind erosion resistance of steppe soils of Ukraine
Authors: Chornyy S. , Pismenniy O.
Published: July 2015

Aim. The study of direct (wind erosion resistance) and indirect (lumpiness, mechanical durability, etc) indices of current wind erosion resistance of steppe soils in Ukraine. Methods. The following methods were used: fi eld, laboratory, mathematical and statistical, analytical and comparative methods. Wind resistance of soils was studied using the elaborated method in the aerodynamic unit. Results. The studies revealed that the high- est resistance to soil blowing due to strong winds is demonstrated by light loamy chernozem, somewhat lower resistance – by southern and dark-chestnut heavy loamy chernozem, light loamy, sandy loamy and sandy turf soil. It was demonstrated that the irrigation with mineralized water enhances the indices of wind erosion resis- tance of dark-chestnut soil and southern chernozem. The granulometric analysis of soil revealed quantitative dependence between the wind erosion resistance, humus content and physical clay content. Conclusions. The studies on wind erosion resistance of dry
steppe and southern steppe soils of Ukraine and the classifi cation of soil types regarding their capability of resisting strong winds allow implementing the measures of preventing wind erosion.
Productivity of maize hybrids of different FAO groups depending on conditions of irrigation and dosage of fertilizers in the southern steppe of Ukraine
Authors: Vozhegova R. , Lavrynenko Yu. , Glushko T.
Published: July 2015

Aim. To determine optimal doses of mineral fertilizers taking into consideration biological specifi cities of new maize hybrids of different FAO groups in irrigation conditions of the southern Ukraine and to trace their impact on the formation of grain productivity of plants. Methods. The fi eld method was used to study the in- teraction of the investigated object and both experimental and environmental factors via the registration of the yield volume and biometric measurements; the laboratory method was used to determine soil humidity, humidity content in grain and quality indices of grain; the statistical method was used to estimate the reli- ability of the results obtained; and the computational method was used in economic and energetic estimation of the employed cultivation techniques. Results. The yield of maize grain of 13–15.42 t per ha on condition of irrigation and introduction of the estimated amount of mineral fertilizer N 240 P 0 K 0 is registered for hybrids of mid-ripening and middle-late
groups – Azov, Krasyliv 357 MB, Sokolov 407 MB, Bystrytsia 400 MB. Without irrigation, the highest yield is remarkable for the hybrids of early-ripening and middle-early groups – Tendra, April 187 MB, Syvash, Orzhytsia 237 MB (grain yield of 3.15–3.39 t per ha). Conclusions. The following hy- brids are recommended for cultivation on condition of irrigation of dark-chestnut soils of the southern steppe of Ukraine: early-ripening Tendra, middle-early – Orzhytsia 237 MB, mid-ripening – Krasyliv 357 MB, and middle-late – Bystrytsia 400 MB, with the introduction of the estimated dose of the mineral fertilizers, defined by the difference between the amount of nutritious elements, required for the formation of productivity of the desired level and their content in the soil of a specific plot.
Agrobiology of Rhizosphere
Authors: Patyka N. , Kaminsky V.
Published: July 2015

Modern trends in studying the rhizosphere agrobiology in accordance to the specifi cities and mechanisms of formation of natural functional and structural interspecies relations, the organizational components of soil formation system as well as plant-microbe interactions have been considered. It was demonstrated that the investigations at the interface of different fi elds of study (agriculture, soil science, microbiology, biogeochem- istry, etc.) allow revealing the specifi cities of the formation of the structure of taxon-wise functional diversity of rhizobacterial groups as a constituent of the complicated system of rhizosphere organization and conducting effective integration and management of soil processes in agroecosystems.
EDITORIAL
Authors: Massal Julie
Published: July 2015

El presente dossier es el resultado de una convocatoria lanzada a inicios de 2014, por el grupo de Relaciones internacionales del IEPRI y el equipo de la Revista. El dossier que se presenta en esta edición propone una reflexión sobre la situación actual en la que se encuentran las relaciones internacionales de y en América Latina, particularmente en el área andina. Los artículos recibidos se inscriben en su gran mayoría en tres ejes de reflexión propuestos en la convocatoria: 1) el reto energético; 2) los procesos de integración regional e internacional; 3) los cambios políticos internos.
POLÍTICA EXTRACCIONISTA DE HIDROCARBUROS EN COLOMBIA Y ECUADOR: CRÍTICA DESDE EL ANÁLISIS DEL POSDESARROLLO
Authors: Bonilla Montenegro Julián Darío
Published: July 2015

En la región andino-amazónica se concentran gran cantidad de las reservas de hidrocarburos que han sido explotados por gobiernos que se adscriben a distintas corrientes ideológicas, tanto en aspectos políticos como económicos. Sin embargo, una de las falencias que se presenta alrededor de la ortodoxia tradicional para el diseño de las políticas económicas es la de construir parámetros que midan el crecimiento económico como una variable esencial para el desarrollo económico; esto por encima de factores de protección ambiental o de respeto a comunidad originarias de las regiones. En el caso particular de Colombia y Ecuador, el proceso se ha construido sobre la necesidad de generar procesos extraccionistas en zonas medioambientales protegidas. Lo anterior puede criticarse desde los estudios del posdesarrollo, tomando en consideración un parámetro metodológico de carácter comparativo; también recurriendo a la información coyuntural extraída a través de las redes virtuales que responden a este proceso; e igualmente, haciendo énfasis en las características particulares que se presentan en cada uno de estos países, bajo la necesidad de considerar la explotación económica como la única alternativa para el crecimiento y el desarrollo económico.
Constructing S-boxes with low multiplicative complexity
Authors: Zajac Pavol
Published: July 2015

Multiplicative complexity is the minimum number of AND-gates required to implement a given Boolean function in (AND, XOR) algebra. It is a good measure of a hardware complexity of an S-box, but an S-box cannot have too low multiplicative complexity due to security constraints. In this article we focus on generic constructions that can be used to find good n×n S-boxes with low multiplicative complexity. We tested these constructions in the specific case when n = 8. We were able to find 8 × 8 S-boxes with multiplicative complexity at most 16 (which is half of the known bound on multiplicative complexity of the AES S-box), while providing a reasonable resistance against linear and differential cryptanalysis.
Explicit constructions of extremal graphs and new multivariate cryptosystems
Authors: Ustimenko Vasyl
Published: July 2015

New multivariate cryptosystems are introduced. Sequences f(n) of bijective polynomial transformations of bijective multivariate transformations of affine spaces Kn, n = 2, 3, ... , where K is a finite commutative ring with special properties, are used for the constructions of cryptosystems. On axiomatic level, the concept of a family of multivariate maps with invertible decomposition is proposed. Such decomposition is used as private key in a public key infrastructure. Requirements of polynomiality of degree and density allow to estimate the complexity of encryption procedure for a public user. The concepts of stable family and family of increasing order are motivated by studies of discrete logarithm problem in Cremona group. Statement on the existence of families of multivariate maps of polynomial degree and polynomial density with the invertible decomposition is formulated. We observe known explicit constructions of special families of multivariate maps. They correspond to explicit constructions of families of nonlinear algebraic graphs of increasing girth which appeared in Extremal Graph Theory. The families are generated by pseudorandom walks on graphs. This fact ensures the existence of invertible decomposition; a certain girth property guarantees the increase of order for the family of multivariate maps, good expansion properties of families of graphs lead to good mixing properties of graph based private key algorithms. We describe the general schemes of cryptographic applications of such families (public key infrastructure, symbolic Diffie—Hellman protocol, functional versions of El Gamal algorithm).
Explicit endomorphism of the Jacobian of a hyperelliptic function field of genus 2 using base field operations
Authors: Duarte Eduardo Ruiz , Osuna Octavio Páez
Published: July 2015

We present an efficient endomorphism for the Jacobian of a curve C of genus 2 for divisors having a Non disjoint support. This extends the work of Costello and Lauter in [12] who calculated explicit formulæ for divisor doubling and addition of divisors with disjoint support in JF(C) using only base field operations. Explicit formulæ is presented for this third case and a different approach for divisor doubling.
Fault-injection based backdoors in Pseudo Random Number Generators
Authors: Tihanyi Norbert
Published: July 2015

The main aim of this paper is to present the concept of fault-injection backdoors in Random Number Generators. Backdoors can be activated by fault-injection techniques. Presented algorithms can be used in embedded systems like smart-cards and hardware security modules in order to implement subliminal channels in random number generators.
A Keyboard-Based r-Shaped Triboelectric Generator for Active Noise-Free Recording
Authors: Han Mengdi , Meng Bo , Cheng Xiaoliang , Zhu Fuyun , Shi Mayue , Zhang Haixia
Published: July 2015

This paper presents a method for noise-free recording of the keyboard-based musical instruments. By integrating an r-shaped triboelectric generator (TEG) into the keyboard of a piano, it can produce electric signal while playing music due to the combination of contact electrification and electric induction. We investigated the electric signal and developed a graphical user interface to convert the electric signal back to music. Using the piano and the graphical user interface, active noise-free recording can be realized. Namely, only the sound produced by the piano can be converted and recorded, while other noise in the environment can be filtered automatically.
Dialogue in Music Therapy - Its Role and Forms
Authors: Bergstroem-Nielsen Carl
Published: July 2015

Dialogue is a fundamental human way of acquiring knowledge. Psychological descriptions of dialogue range from pre-natal ones to adult turn-taking. Scales have been devised to rate its well-functioning, and conversational analysis has been introduced to illuminate the interactive aspect within music.Case vignettes illustrate different kinds of dialogue with my own clients suffering from intellectual disabilities. With Lone, a focused training of turn-taking became possible, despite pronounced autistic behaviour. With Dennis I employed both turn-taking training and playing of arranged songs. The latter had the purpose of providing a relatively safe situation where initiative had to be shown. Asymmetric dialogue deals with the challenge presented by clients with contact disabilities. Ideas are stated on how to cope with scarcity of response. A hierarchical model of time-levels is presented in which levels are related to activities of the session, aiming at providing sustained structure as well as flexibility according to situations arising. The conclusion compares forms of dialogue described in the vignettes: "regular turn-taking", "communication at a "split-second level"" and "asymmetric dialogue". As a possible field of further research, studies of conscious/subconscious interaction in the human psyche as well as how different dialogue levels function together are suggested.
Music Therapy, Social Policy and Ecological Models: A Located Example of Music in Australian Schools
Authors: Crooke Alexander Hew Dale
Published: July 2015

While music therapy courses rarely cover the finer points of social policy, a basic knowledge of how this system of governance works can be highly beneficial for those wanting to maximise their presence and impact in a given field. Taking an ecological approach, this article presents how music therapy as a discipline and practise can be seen as located within a structure of policy. Further, it illustrates how understanding this structure can help practitioners and researchers capitalise on the opportunities they provide, and work around the barriers they impose. It does this by providing a background of the ecological model approach, and discussing how this approach can be useful for thinking about the relationship between music therapy and social policy. It then uses the policy situation surrounding music in Australian schools to give a grounded example of how understanding this situation can help position music therapy to meet key policy goals at national and localised levels. It is hoped that increased awareness, and an example of how it can be applied, will empower music therapists to learn about policies in their specific areas, and capitalise on the opportunities they provide.
Celebrating 15 Years of Music Therapy Training in South Africa
Authors: Oosthuizen Helen Brenda
Published: July 2015

In 2014, the Music Therapy Master’s training course at the University of Pretoria, South Africa, celebrated its 15th anniversary. To mark the occasion, two showcases held in Gauteng and Port Elizabeth celebrated the work that is being done by music therapists and community musicians across the country, both those with many years of experience, students and recent graduates. This report of the showcases highlights the calibre of exciting music therapy projects that are emerging and developing within diverse contexts and communities throughout our country.
Multicultural Music Therapy: An Exploration
Authors: Mahoney Emily Rose
Published: July 2015

This paper examines multicultural issues that currently exist within the field of music therapy. Music therapists often find themselves working with clients who come from very different cultural backgrounds than themselves. Before music therapists can understand and work with clients from other cultures, they must first have an understanding of their own background and culture, and how their values and beliefs have shaped them as therapists. This paper highlights the value of multicultural awareness, and explores issues of disability, gender/sexuality, feminism, and race, as they relate to music therapy.
Estudo de sistemas retardantes de Chama sem Bromo para ABS
Authors: Martins Priscila Alves , Valera Ticiane Sanches , Tenório Jorge Alberto Soares
Published: July 2015

Este trabalho visa estudar e caracterizar o desempenho de aditivos retardantes de chama não bromados em copolímero de ABS. Foram estudadas combinações de retardantes de chama, como: o polifosfato de amônio (APP), a melamina, nanopartículas de dióxido de titânio e argila organicamente modificada com sal quaternário de fosfônio. Os materiais obtidos foram caracterizados por ensaios mecânicos (resistência ao impacto Izod e resistência à tração), análise termogravimétrica (TG), avaliação da morfologia e ensaio de retardância à chama. Os resultados obtidos indicaram uma redução de cerca de 48% na velocidade de propagação da chama dos compósitos com APP/melamina/TiO2/argila organofílica, em relação ao copolímero de ABS puro.
Purificação e organofilização em escala piloto de argilas bentoníticas com tensoativo não iônico e aplicação em nanocompósitos poliméricos
Authors: Cavalcanti Wilma Sales , Brito Gustavo de Figueiredo , Agrawal Pankaj , Mélo Tomás Jeferson Alves de , Neves Gelmires de Araújo , Dantas Mísia Macedo
Published: July 2015

O objetivo deste trabalho foi a purificação e organofilização em escala piloto de dois tipos de argila bentonita (cinza e verde) com tensoativo não iônico e a aplicação destas argilas em nanocompósitos com matriz de Polipropileno (PP). As argilas foram purificadas e em seguida organicamente modificadas com tensoativo não iônico tornando-se organofílicas, sendo denominadas de CPO e VPO respectivamente, e caracterizadas por Análise Granulométrica por Difração a Laser (AG), análise química por Fluorescência de Raios X (EDX), Difração de Raios X (DRX) e espectroscopia no infravermelho (IV). Os resultados de AG e EDX mostraram redução significativa do teor de areia e da sílica livre na forma de quartzo confirmando que houve a purificação da argila. Os resultados de DRX e IV mostraram que a organofilização em escala piloto das argilas foi realizada com sucesso. Os compósitos contendo 3pcr de argila foram caracterizados por DRX, Calorimetria exploratória diferencial (DSC), Termogravimetria (TG) e propriedades mecânicas. As análises por DRX indicaram formação de um nanocompósito com estrutura intercalada para o sistema PP/E-GMA/CPO, enquanto para o sistema PP/E-GMA/VPO formou-se um micro-compósito. Os resultados de DSC indicaram que as argilas não influenciaram na temperatura de fusão do PP. Os resultados de TG indicaram que as argilas CPO e VPO melhoraram a estabilidade térmica do PP. O sistema PP/E-GMA/CPO foi o que apresentou maior estabilidade térmica e maior módulo. As resistências à tração e ao impacto dos compósitos não apresentaram melhora significativa em relação ao PP puro. Mesmo assim, este comportamento é importante uma vez que as propriedades mecânicas do PP não foram deterioradas.
Membranas de PVA e sílica para aplicação em célula a combustível de alimentação direta de álcool
Authors: Aguiar Liz Contino Vianna de , Gomes Ailton de Souza , Ramos Filho Florêncio Gomes de
Published: July 2015

Membranas de PVA/sílica foram sintetizadas através do processo sol-gel em condições ácidas. Tetraetilortossilicato (TEOS) foi utilizado como precursor em concentrações de 5 a 30% em dois grupos distintos. Um grupo foi utilizado como controle contendo apenas PVA/TEOS. A inserção dos grupamentos necessários para a condutividade ocorreu através da introdução de 12% em massa de heteropoliácido fosfotúngstico hidratado (HPW) em relação à massa de TEOS, formando o segundo grupo. As avaliações quanto ao grau de inchamento, permeabilidade ao etanol e condutividade protônica demonstraram que a membrana contendo 30% em massa de TEOS apresenta os melhores resultados entre as membranas produzidas. Os melhores resultados foram 0,28 mS/cm de condutividade protônica e fluxo de 1,5 kg/m².h de solução de etanol. Nessas condições, considera-se a reticulação das membranas de PVA/SiO2 com o precursor TEOS uma boa alternativa para a reticulação de membranas de PVA visto que as membranas mostraram-se mais seletivas ao fluxo de solução de etanol. Entretanto, para aplicação como eletrólito de célula a combustível, ainda é necessário investigar outras formas de aumentar a condutividade sem prejudicar a estabilidade dimensional.
Usinabilidade de materiais compósitos poliméricos para aplicações automotivas
Authors: Gutiérrez Juan Carlos Horta , Rubio Juan Carlos Campos , Faria Paulo Eustáquio de , Davim João Paulo
Published: July 2015

A cada dia o avanço tecnológico nos leva a encruzilhadas como a construção de veículos mais leves, com menor consumo de combustível e mais seguros. Neste sentido, materiais compósitos poliméricos são materiais usados atualmente em diferentes aplicações nas quais a leveza combinada com um alto módulo de elasticidade são características importantes. Poliamidas reforçadas com fibras de vidro se apresentam como materiais de grande futuro em aplicações automotivas. Desta forma, torna-se importante o estudo do comportamento deste tipo de material quando submetidos a processos de usinagem. Dentre os processos de usinagem o processo de furação é um dos mais utilizados nos componentes de material compósito. Neste trabalho será analisada a influência do avanço, da velocidade de corte e da geometria da ferramenta na força de avanço, pressão específica de corte e desvios dimensionais do furo realizado. Os testes foram realizados em poliamida sem reforço (PA6) e reforçada com 30% fibra de vidro (PA66-GF30) utilizando brocas de carbonetos sinterizados (K20) com ângulos de ponta diferente. Os resultados apontam claramente para a melhor usinabilidade do material reforçado em comparação ao sem reforço.
Avaliação das propriedades química, física e mecânica de painéis aglomerados produzidos com resíduo de madeira da Amazônia - Cumaru (Dipteryx Odorata) e resina poliuretana à base de óleo de mamona
Authors: Zau Mírian Dayse Lima , Vasconcelos Raimundo Pereira de , Giacon Virginia Mansanares , Lahr Francisco Antônio Rocco
Published: July 2015

O beneficiamento de toras de madeira produz uma grande quantidade de resíduos, em torno de 60%, os quais em geral são aproveitados na geração de energia com a produção de cinzas e fuligem, ou dispostos em locais inadequados, gerando um problema ambiental sério. Nesse sentido, o presente estudo tem como objetivo principal produzir e avaliar física e mecanicamente painéis produzidos com resíduos do beneficiamento de madeira de Dipteryx odorata (Cumaru), espécie tropical cuja caracterização química e física também foi realizada. Para a produção dos painéis fez-se uso de um planejamento fatorial (2²+1) no qual foram analisadas as quantidades de resíduo e resina. Para a análise físico-mecânica, foram produzidos 24 painéis em diferentes condições de quantidade de resíduo (1000; 1300; 1500 g) e teor de resina (10; 12,5 e 15%). Os painéis foram cortados para obtenção dos corpos-de-prova para determinação de densidade, razão de compactação, inchamento e absorção (2 e 24 h); módulo de ruptura e de elasticidade em flexão estática, adesão interna e arrancamento de parafuso. Os painéis a 1500 g (10 e 15%) foram os que apresentaram os melhores resultados mecânicos, superiores ao mínimo especificado pela norma NBR 14810-3 (2006), evidenciando seu potencial na produção desses painéis.
Cinética de cristalização não-isotérmica de resíduos de polietileno de alta densidade (PEAD)
Authors: Costa Helson Moreira da , Andrade Mônica Calixto de , Lessa Milena Diniz , Ramos Valéria Dutra
Published: July 2015

Nesta investigação, diversos resíduos incolores ou coloridos pós-consumo de polietileno de alta densidade (PEAD) foram caracterizados através do índice de fluidez (MFI) e da calorimetria exploratória diferencial (DSC). A equação de Avrami modificada por Jeziorny, e os modelos de Kissenger e Friedman foram utilizados para descrever a cinética de cristalização não-isotérmica das amostras. Foi verificado que os pigmentos presentes no PEAD têm diferentes habilidades nucleantes durante o processo de cristalização, bem como diferentes efeitos sobre a taxa de cristalização e a energia de ativação necessária para o transporte de segmentos macromoleculares para a superfície do cristal em crescimento.
Influência de variáveis de sinterização na microestrutura de peças de PTFE moldadas por prensagem isostática
Authors: Strabelli Patrícia Giunchetti , Sciuti Vinicius Fiocco , Montilha Fernanda Silveira , Canto Leonardo Bresciani , Canto Rodrigo Bresciani
Published: July 2015

O politetrafluoretileno (PTFE) é utilizado em extensa gama de aplicações críticas devido à sua excelente resistência química e térmica, baixa energia superficial e propriedades tribológicas. Devido à sua elevada viscosidade no estado fundido, o PTFE não pode ser transformado pelos métodos tradicionais de extrusão e injeção, sendo o principal método de transformação deste polímero a prensagem sob temperatura ambiente, seguida de sinterização a temperaturas acima do ponto de fusão. O tempo de sinterização é definido de acordo com as dimensões da peça fabricada, podendo variar de poucas horas até vários dias para peças de grande volume. Avaliações sobre a influência dos extremos de tempo e temperatura de sinterização, atualmente adotados na indústria, sobre a microestrutura cristalina do PTFE, são escassas na literatura científica, sendo o principal objetivo deste estudo. Placas em PTFE foram sinterizadas variando-se a temperatura entre 360 ○C e 390 ○C e o tempo entre 10 e 10.000 min. Calorimetria exploratória diferencial (DSC), medidas de perda de massa e de densidade e microscopia eletrônica de varredura (MEV) foram utilizadas. Os resultados das medidas de perda de massa indicaram que a degradação do PTFE aumenta com o tempo e temperatura de sinterização. Análises das entalpias de fusão e medidas de densidade apontam indiretamente a redução na massa molar e aumento no grau de cristalinidade com o aumento do tempo e temperatura de sinterização. As análises em MEV possibilitaram a observação direta da microestrutura cristalina, indicando uma tendência de aumento da largura das lamelas com o tempo e temperatura de sinterização. Os resultados obtidos podem auxiliar no controle da microestrutura do PTFE durante o processamento, o que é bastante útil para a fabricação de peças em PTFE com desempenho otimizado.
Síntesis de hidrogeles de acrilamida en soluciones acuosas de etanol
Authors: García Sánchez Luis Guillermo de Jesús , Cortés Ortega Jorge Alberto
Published: July 2015

En el presente trabajo se realizó la polimerización de acrilamida en soluciones acuosas de etanol, variando la composición del etanol en la solución; obteniéndose tanto nanogeles como macrogeles. Se determinó la capacidad de absorber agua de los macrogeles; obteniéndose materiales que tienen una capacidad de absorber desde 40 y hasta 90 gramos de agua por gramo de xerogel y el tamaño de partícula de los nanogeles fueron desde 71 nm y hasta 463 nm.
Estudo da cinética de decomposição de compósitos nanoestruturados de poli (sulfeto de fenileno) reforçados com nanotubos de carbono
Authors: Ribeiro Bruno , Botelho Edson C. , Costa Michelle L.
Published: July 2015

O objetivo deste trabalho consiste na obtenção de compósitos nanoestruturados de poli (sulfeto de fenileno) (PPS) reforçados com nanotubos de carbono de paredes múltiplas (MWCNT) por meio da técnica de mistura em fusão, e posterior caracterização de suas propriedades morfológicas e térmicas. A análise por microscopia eletrônica de transmissão foi utilizada com o intuito de avaliar a qualidade da dispersão dos MWCNTs na matriz polimérica. A partir das curvas de termogravimetria obtidas, foi observado um aumento na temperatura máxima de degradação pela adição do nanoreforço na matriz polimérica. Além disso, o modelo matemático de Ozawa-Wall-Flynn foi utilizado com o intuito de determinar os parâmetros cinéticos de degradação. Os resultados mostraram um aumento de aproximadamente 25 ºC na temperatura máxima de degradação (Tmax) quando uma pequena quantidade de MWCNT (0,5 wt %) foi considerada. Este fato contribuiu para o aumento da estabilidade térmica do PPS.
Shrinkage of high-strength calcium sulfoaluminate cement concrete with impact of pre-soaked lightweight aggregate internal curing
Authors: Zhang Jun , Luosun Yiming , Wang Jiahe , Han Yudong
Published: July 2015

The effect of internal curing using pre-soaked lightweight aggregate in high-strength calcium sulfoaluminate cement concrete on shrinkage and internal humidity was investigated. Five mixture proportions with induced internal curing water (absorbed by lightweight aggregate) to cement (wIC/c) ratios of 0, 0·03, 0·06, 0·09 and 0·12 were used in the experiments. The experimental results show that the decrease of internal humidity is gradually reduced with an increase in wIC/c ratio. Accordingly, both autogenous and drying shrinkage of concrete also gradually decrease with an increase in wIC/c. Internal curing cannot eliminate the autogenous shrinkage completely because part of the autogenous shrinkage develops within the humidity-saturated stage for early-age concrete.