bluuebunny/crossref_metadata_2025 huggingface dataset:
Positive solutions for Hadamard differential systems with fractional integral conditions on an unbounded domain
Authors: Jessada Tariboon , Ntouyas Sotiris K. , Asawasamrit Suphawat , Promsakon Chanon
Published: June 2017

In this paper, we investigate the existence of positive solutions for Hadamard type fractional differential system with coupled nonlocal fractional integral boundary conditions on an infinite domain. Our analysis relies on Guo-Krasnoselskii’s and Leggett-Williams fixed point theorems. The obtained results are well illustrated with the aid of examples.
One kind sixth power mean of the three-term exponential sums
Authors: Wang Xiaoying , Li Xiaoxue
Published: June 2017

In this paper, we use the estimate for trigonometric sums and the properties of the congruence equations to study the computational problem of one kind sixth power mean of the three-term exponential sums. As a conclusion, we give an exact computational formula for it.
The hyperbolicity constant of infinite circulant graphs
Authors: Rodríguez José M. , Sigarreta José M.
Published: June 2017

If X is a geodesic metric space and x1, x2, x3 ∈ X, a geodesic triangle T = {x1, x2, x3} is the union of the three geodesics [x1x2], [x2x3] and [x3x1] in X. The space X is δ-hyperbolic (in the Gromov sense) if any side of T is contained in a δ-neighborhood of the union of the two other sides, for every geodesic triangle T in X. Deciding whether or not a graph is hyperbolic is usually very difficult; therefore, it is interesting to find classes of graphs which are hyperbolic. A graph is circulant if it has a cyclic group of automorphisms that includes an automorphism taking any vertex to any other vertex. In this paper we prove that infinite circulant graphs and their complements are hyperbolic. Furthermore, we obtain several sharp inequalities for the hyperbolicity constant of a large class of infinite circulant graphs and the precise value of the hyperbolicity constant of many circulant graphs. Besides, we give sharp bounds for the hyperbolicity constant of the complement of every infinite circulant graph.
Coupled fixed point theorems in complete metric spaces endowed with a directed graph and application
Authors: Kir Mehmet , Yolacan Esra , Kiziltunc Hukmi
Published: June 2017

The purpose of this paper is to present some existence results for coupled fixed point of a (φ,ψ) —contractive condition for mixed monotone operators in metric spaces endowed with a directed graph. Our results generalize the results obtained by Jain et al. in (International Journal of Analysis, Volume 2014, Article ID 586096, 9 pages). Moreover, we have an application to some integral system to support the results.
Existence of entropy solutions for nonlinear elliptic degenerate anisotropic equations
Authors: Gorban Yuliya
Published: June 2017

In the present article we deal with the Dirichlet problem for a class of degenerate anisotropic elliptic second-order equations with L1-right-hand sides in a bounded domain of ℝn(n ⩾ 2) . This class is described by the presence of a set of exponents q1,…, qn and a set of weighted functions ν1,…, νn in growth and coercitivity conditions on coefficients of the equations. The exponents qi characterize the rates of growth of the coefficients with respect to the corresponding derivatives of unknown function, and the functions νi characterize degeneration or singularity of the coefficients with respect to independent variables. Our aim is to investigate the existence of entropy solutions of the problem under consideration.
Linear dynamics of semigroups generated by differential operators
Authors: Alberto Conejero J. , Lizama Carlos , Murillo-Arcila Marina , Peris Alfredo
Published: June 2017

During the last years, several notions have been introduced for describing the dynamical behavior of linear operators on infinite-dimensional spaces, such as hypercyclicity, chaos in the sense of Devaney, chaos in the sense of Li-Yorke, subchaos, mixing and weakly mixing properties, and frequent hypercyclicity, among others. These notions have been extended, as far as possible, to the setting of C0-semigroups of linear and continuous operators.

We will review some of these notions and we will discuss basic properties of the dynamics of C0-semigroups. We will also study in detail the dynamics of the translation C0-semigroup on weighted spaces of integrable functions and of continuous functions vanishing at infinity. Using the comparison lemma, these results can be transferred to the solution C0-semigroups of some partial differential equations. Additionally, we will also visit the chaos for infinite systems of ordinary differential equations, that can be of interest for representing birth-and-death process or car-following traffic models.
Features of the structural and magnetic properties of Pb(TixZr1–xO3)-NiFe1.98Co0.02O4 in the polarized state
Authors: Baev Vadim , Budzyński Mieczysław , Laletin Vladimir , Mitsiuk Victor , Poddubnaya Natali , Surowiec Zbigniew , Yanushkevich Kazimir
Published: June 2017

Composites with a 90%Pb(TixZr1-xO3)-10%NiFe1.98Co0.02O4 composition have been synthesized. It has been established that the polarization of samples resulting from exposure to an electric field for 1 hour of 4 kV/mm in strength at a temperature of 400 K leads to crystal structure deformation. The compression of elementary crystal cells in some areas during polarization of the sample creates conditions suitable for the enhancement of magnetic exchange interactions. It has been found that the polarization process of such compositions leads to increases in specific magnetization and magnetic susceptibility. The analysis of Mössbauer spectra has shown that the polarization of the 90%Pb(TixZr1-xO3)-10%NiFe1.98Co0.02O4 composite leads to significant changes in the effective magnetic fields of iron subspectra in various positions.
Thermodynamic properties of dilute Co-Fe solid solutions studied by 57Fe Mössbauer spectroscopy
Authors: Konieczny Robert , Idczak Rafał
Published: June 2017

The Co1-xFex alloys where x ranges from 0.01 to 0.06 were measured at room temperature using transmission Mössbauer spectroscopy (TMS). The analysis of the obtained data allowed the determination of the short-range order (SRO), the binding energy Eb between two iron atoms in the studied materials using the extended Hrynkiewicz-Królas idea and the enthalpy of solution HCo-Fe of Fe in Co. The results showed that the Fe atoms dissolved in a Co matrix interact repulsively and the estimated value of HCo-Fe = -0.166(33) eV/atom. Finally, values of the enthalpy of solution were used to predict the enthalpy of mixing for the Co-Fe system. These findings were compared with corresponding data given in the literature, which were derived from calorimetric experiments and from the cellular atomic model of alloys described by Miedema.
Mössbauer and heat capacity studies of ErZnSn2
Authors: Łątka Kazimierz , Przewoźnik Janusz , Żukrowski Jan , Verbovytskyy Yuriy , Gonçalves Antonio Pereira
Published: June 2017

Heat capacity results obtained for the intermetallic compound ErZnSn2 were re-analysed to also consider, apart from the classical Debye model, the anharmonicity of the crystal lattice and the proper set of Einstein modes. The 119mSn Mössbauer technique was applied to derive the hyperfine interaction parameters characteristic of the two inequivalent crystallographic Sn sites in the compound studied. Quadrupole interaction constants, as measured by 119mSn Mössbauer spectroscopy, allowed for estimations of Vzz components of the electric field gradient tensor that exist at both Sn sites in the discussed compound.
A comparative study of hyperfine interactions in Aurivillius compounds prepared by mechanical activation and solid-state sintering
Authors: Mazurek Mariusz , Jartych Elżbieta
Published: June 2017

X-ray diffraction and Mössbauer spectroscopy techniques were used to study the structure and hyperfine interactions of multiferroic Aurivillius compounds Bim+1Ti3Fem-3O3m+3. Samples were synthesized by two methods, that is, the solid-state sintering at various temperatures and mechanical activation in a high-energy ball mill. The compounds were obtained from a mixture of three polycrystalline powder oxides, that is, TiO2, Fe2O3 and Bi2O3. At room temperature, the Aurivillius compounds are paramagnetic materials with orthorhombic crystal structure. The c lattice parameter of the unit cell depends linearly on the m − number of layers with perovskite-like structure. Based on the Mössbauer studies, it is concluded that the hyperfine interactions parameters do not change with m number.
Crystal structure and Mössbauer effect in multiferroic 0.5BiFeO3-0.5Pb(Fe0.5Ta0.5)O3 solid solution
Authors: Stoch Agata , Maurin Jan , Stoch Paweł , Kulawik Jan , Szwagierczak Dorota
Published: June 2017

Multiferroic 0.5BiFeO3-0.5Pb(Fe0.5Ta0.5)O3 solid solution is a material that exhibits ferroelectric and antiferromagnetic orderings in ambient temperature. The solid solution was obtained as a result of a conventional reaction in a solid state. The obtained material is a dense, fine-grained sinter whose surface was observed by scanning electron microscopy (SEM) and stoichiometry was confirmed by energy dispersive X-ray spectroscopic (EDS) analysis. According to the X-ray powder diffraction (XRD) measurements, the main phase is R3c space group with admixture of Pm-3m regular phase. Small contribution of pyrochlore-like phase was also observed. Mössbauer spectroscopy suggested random distribution of Fe3+/Ta5+ cations in the B sites of ABO3 compound. Reduction of the magnetic hyperfine field with an increase in the substitution of Ta5+ in Fe3+ neighbourhood was also observed.
Investigation of magnetite Fe3O4 nanoparticles for magnetic hyperthermia
Authors: Surowiec Zbigniew , Miaskowski Arkadiusz , Budzyński Mieczysław
Published: June 2017

The paper presents the investigation of magnetic nanoparticles (MNPs) dedicated to hyperthermia application. The crystal structure and size distributions have been determined by means of transmission electron microscope (TEM) and X-ray diffraction (XRD). Magnetic properties of the nanoparticles were tested by Mössbauer spectroscopy together with calorimetric experiments. The Mössbauer spectroscopic study of MNPs revealed the existence of a superparamagnetic phase. The relative contribution of the relaxing component to the total spectrum at room temperature was about 10%. The heating effect of these MNPs under alternating magnetic field was examined. The temperature increase has reached 5°C in 10 min. The preliminary temperature rise suggests that the investigated materials are applicable for hyperthermia.
Iron-containing phases in metallurgical and coke dusts as well as in bog iron ore
Authors: Szumiata Tadeusz , Rachwał Marzena , Magiera Tadeusz , Brzózka Katarzyna , Gzik-Szumiata Małgorzata , Gawroński Michał , Górka Bogumił , Kyzioł-Komosińska Joanna
Published: June 2017

Several samples of dusts from steel and coke plants (collected mostly with electro filters) were subjected to the investigation of content of mineral phases in their particles. Additionally, sample of bog iron ore and metallurgical slurry was studied. Next, the magnetic susceptibility of all the samples was determined, and investigations of iron-containing phases were performed using transmission Mössbauer spectrometry. The values of mass-specific magnetic susceptibility χ varied in a wide range: from 59 to above 7000 × 10−8 m-3·kg−1. The low values are determined for bog iron ore, metallurgical slurry, and coke dusts. The extremely high χ was obtained for metallurgical dusts. The Mössbauer spectra and X-ray diffraction patterns point to the presence of the following phases containing iron: hematite and oxidized magnetite (in coke and metallurgical dusts as well as metallurgical slurry), traces of magnetite fine grains fraction (in metallurgical dusts), amorphous glassy silicates with paramagnetic Fe3+ and Fe2+ ions, traces of pyrrhotite (in coke dusts), α-Fe and nonstoichiometric wüstite (in metallurgical slurry), as well as ferrihydrite nanoparticles (in bog iron ore). For individual samples of metallurgical dusts, the relative contributions of Fe2+/3+ ions in octahedral B sites and Fe2+ ions in tetrahedral A sites in magnetite spinel structure differs considerably.
Abiotic stress tolerance of microorganisms associated with oregano (Origanum vulgare L.) in the Yaqui Valley, Sonora
Authors: Meléndez Mariel García , Camargo Geovanna Zárate , Meza Contreras Jenny Jocabet , Sepúlveda Angélica Herrera , Santos Villalobos Sergio de los , Parra Cota Fannie Isela
Published: June 2017

The impact of agricultural activities on microbial communities and environmental parameters was evaluated in two different soil samples. One sample corresponded to soil designated to oregano cultivation and the other one to native soil, both located in the Yaqui Valley, Sonora. The objective of this study was to estimate the microbial diversity in both soil samples, evaluating isolates obtained under three stress conditions: temperature, salinity and pesticide resistance, as well as using metabolic tests to evaluate their potential capabilities as plant growth promoting bacteria. The bacterial population was 5.9×106 and 3.8×106 CFU/g dry soil, in the native and oregano-designated soil, respectively. A total of twenty-four bacteria and one actinobacterium were isolated. Native soil microorganisms presented higher values for fungicide tolerance and indoleacetic acid production; however, temperature stress, salinity resistance, siderophore production and phosphate solubilization were higher for microorganisms isolated from the agricultural soil. These results demonstrate the impact of land use on microbial communities and their potential eco-functional roles.
Generating Questions: Processing Time Changes Between Early Adolescence and Young Adulthood
Authors: Drumm Patrick , Jackson Dorothy W.
Published: June 2017

Information seeking by asking questions is fundamental to solving some problems. How quickly it proceeds can be important, especially if stakes are high. This experiment compared the processing times of three question types generated by early adolescents, middle adolescents, and young adults who sought to identify unknown target exemplars in a series of test arrays. Category questions, which eliminate alternatives based on their membership in contrasting mutually exclusive sets, were of two types: conceptual and perceptual. Conceptual category questions took longer to generate than perceptual category questions for all age groups. Syncretic questions, which refer to more than one category, took longer to generate than perceptual category questions for early adolescents, although they did not take longer to generate than perceptual category questions for the two older groups. Age-related changes in cognitive processing, syncretic thinking, and experience with hypothesis testing provide a framework for interpreting these results.
Designing Peg Solitaire Puzzles
Authors: Bell George I.
Published: June 2017

Peg solitaire is an old puzzle with a 300 year history. We consider two ways a computer can be utilized to find interesting peg solitaire puzzles. It is common for a peg solitaire puzzle to begin from a symmetric board position, we have computed solvable symmetric board positions for four board shapes. A new idea is to search for board positions which have a unique starting jump leading to a solution. We show many challenging puzzles uncovered by this search technique. Clever solvers can take advantage of the uniqueness property to help solve these puzzles.
Demystifying Benjamin Franklin’s Other 8-Square
Authors: Ahmed Maya Mohsin
Published: June 2017

In this article, we reveal how Benjamin Franklin constructed his second 8 × 8 magic square. We also construct two new 8 × 8 Franklin squares
Exploring the “Rubik's Magic” Universe
Authors: Paolini Maurizio
Published: June 2017

By using two different invariants for the Rubik’s Magic puzzle, one of metric type, the other of topological type, we can dramatically reduce the universe of constructible configurations of the puzzle. Finding the set of actually constructible shapes remains however a challenging task, that we tackle by first reducing the target shapes to specific configurations: the octominoid 3D shapes, with all tiles parallel to one coordinate plane; and the planar “face-up” shapes, with all tiles (considered of infinitesimal width) lying in a common plane and without superposed consecutive tiles. There are still plenty of interesting configurations that do not belong to either of these two collections. The set of constructible configurations (those that can be obtained by manipulation of the undecorated puzzle from the starting situation) is a subset of the set of configurations with vanishing invariants. We were able to actually construct all octominoid shapes with vanishing invariants and most of the planar “face-up” configurations. Particularly important is the topological invariant, of which we recently found mention in [7] by Tom Verhoeff.
On a Mathematical Model for an Old Card Trick
Authors: Quintero Roy
Published: June 2017

The three-pile trick is a well-known card trick performed with a deck of 27 cards which dates back to the early seventeenth century at least and its objective is to uncover the card chosen by a volunteer. The main purpose of this research is to give a mathematical generalization of the three-pile trick for any deck of ab cards with a, b ≥ 2 any integers by means of a finite family of simple discrete functions. Then, it is proved each of these functions has just one or two stable fixed points. Based on this findings a list of 222 (three-pile trick)-type brand new card tricks was generated for either a package of 52 playing cards or any appropriate portion of it with a number of piles between 3 and 7. It is worth noting that all the card tricks on the list share the three main properties that have characterized the three-pile trick: simplicity, self-performing and infallibility. Finally, a general performing protocol, useful for magicians, is given for all the cases. All the employed math techniques involve naive theory of discrete functions, basic properties of the quotient and remainder of the division of integers and modular arithmetic.
Eternal Picaria
Authors: Larsson Urban , Rocha Israel
Published: June 2017

Picaria is a traditional board game, played by the Zuni tribe of the American Southwest and other parts of the world, such as a rural Southwest region in Sweden. It is related to the popular children’s game of Tic-tac-toe, but the 2 players have only 3 stones each, and in the second phase of the game, pieces are slided, along specified move edges, in attempts to create the three-in-a-row. We provide a rigorous solution, and prove that the game is a draw; moreover our solution gives insights to strategies that players can use.
Understanding Student Motivation: A Key to Retention in Higher Education
Authors: Rizkallah Elias G. , Seitz Victoria
Published: June 2017

This paper explores what motivates college students at different stages of their academic studies. Using Herzberg’s two-factor theory, the researchers conducted a survey of 535 students in three south-western universities to determine if motivations changed throughout their academic careers. Results showed that students at different stages of their college careers have different concerns and, as such, different motivational strategies are needed to respond to their concerns. Implications are given to grow and retain enrolment.
The Effect of Credit Risk and Capital Adequacy on the Profitability of Rural Banks in the Philippines
Authors: Mendoza Rufo , Rivera John Paolo R.
Published: June 2017

This paper examines the credit risk and capital adequacy of the 567 rural banks in the Philippines to investigate how both variables affect bank profitability. Using the Arellano-Bond estimator, we found out that credit risk has a negative and statistically significant relationship with profitability. However, empirical analysis showed that capital adequacy has no significant impact on the profitability of rural banks in the Philippines. It is therefore necessary for the rural banks to examine more deeply if capital infusion would result in higher profitability than increasing debts. The study also implies that it is imperative for the banks to understand which risk factors have greater impact on their financial performance and use better risk-adjusted performance measurement to support their strategies. Rural banks should establish credit risk management that defines the process from initiation to approval of loans, taking into consideration the sound credit risk management practices issued by regulatory bodies. Moreover, rural banks need to enhance internal control measures to ensure the strict implementation of internal processes on lending operations.
Trade Credit Insurance and Asymmetric Information Problem
Authors: Sokolovska Olena
Published: June 2017

The presence of different risk factors in international trade gives evidence of the necessity of support in gaps that may affect exporters’ activity. To maximize the trade volumes and in the same time to minimize the exporters’ risks the stakeholders use trade credit insurance. The paper provides analysis of conceptual background of the trade credit insurance in the world. We analyzed briefly the problems, arising in insurance markets due to asymmetric information, such as adverse selection and moral hazard. Also we discuss the main stages of development of trade credit insurance in countries worldwide. Using comparative and graphical analysis we provide a brief evaluation of the dynamics of claims and recoveries for different forms of trade credit insurance. We found that the claims related to the commercial risk for medium and long trade credits in recent years exceed the recoveries, while with the political risk the reverse trend holds. And we originally consider these findings in terms of information asymmetry in the trade credit insurance differentiated by type of risk.
Impact of Entertainment Motivational Drivers on User Acceptance of Online Social Network Banner Advertising: A Gratification Perspective
Authors: Mir Imran Anwar
Published: June 2017

Social media has phenomenally changed the communication landscape. Particularly social network sites have received enormous popularity and user acceptance globally. The business model of many social network sites is based on advertising. The survival of these social network sites depends on the user acceptance of advertising appearing on these websites. Users usually accept the advertising which is consistent with their motivations for using social network sites. The current study examines the underlying dimensions of entertainment motivation for using social network sites and their impact on user acceptance of social network advertising. Analysis of data from 450 university students show entertainment motivation for using social network sites a multidimensional (SNSs) construct consisting of enjoyment, social escapism, relaxation and pass time factors. Furthermore, the results exhibit that SNSs entertainment motivation partially impacts user acceptance of social network advertising.
Emissions Trading for Cleaner Production in the Old and New EU Member States?
Authors: Krištić Irena Raguž
Published: June 2017

This paper examines the success of the European Union Emissions Trading System (EU ETS) in inducing cleaner production in the EU based on the first two trading periods. It fills a literature gap by constructing a measure of clean production and conducting an ex-post macro-level analysis of the EU ETS impacts in EU15 compared to EU12. Results of panel regression analysis robustly show that EU ETS in both EU12 and EU15 (i) has positive impact on clean production of regulated industries, (ii) does not induce spillovers of cleaner technologies and processes to non-regulated industries, and (iii) does not affect clean production at the national level. In addition, share of renewables in energy consumption has a positive and crisis a negative impact on the clean production. Results support further tightening and broader coverage of EU ETS regulation and provision of funds from the EU ETS for development of renewable energy technologies.
Forecasting Capacity of ARIMA Models; A Study on Croatian Industrial Production and its Sub-sectors
Authors: Tomić Daniel , Stjepanović Saša
Published: June 2017

As one of the most important indicator for monitoring the production in industry as well as for directing investment decisions, industrial production plays important role within growth perspectives. Not only does the composition and/or fluctuation of the goods produced indicate the course of economic activity but it also reflects the changes in cyclical development of the economy thereby providing opportunity to macro-manage with early signs of (short-term) turning-points and (long-term) trend variations. In this paper, we compare univariate autoregressive integrated moving average (ARIMA) models of the Croatian industrial production and its subsectors in order to evaluate their forecasting features within short and long-term data evolution. The aim of this study is not to forecast industrial production but to analyze the out-of-sample predictive performance of ARIMA models on aggregated and disaggregated level inside different forecasting horizons. Our results suggest that ARIMA models do perform very well over the whole rage of the prediction horizons. It is mainly because univariate models often improve the predictive ability of their single component over the short horizons. In that manner ARIMA modelling could be used at least as a benchmark for more complex forecasting methods in predicting the movements of industrial production in Croatia.
The Impact of Development Aid on the International Migrations in the African, Caribbean, and Pacifi c Group of States
Authors: Gregl Marko , Logožar Klavdij
Published: June 2017

Development aid, one of the most important mechanisms for the redistribution of global wealth, represents financial flows that have economic growth and social improvement as their main objective. It has also frequently been described as an instrument which is able to diminish international migrations and is used by several developed countries. Recently, much empirical evidence and several contributors have argued that connection and set out other grounds. This paper explores the interaction between development aid and migrations from developing to developed countries. We want to determine, if the amount of development aid has any impact on migrations from African, Caribbean, and the Pacific Group of States. Our results show that development aid does not have a direct effect on migrations and therefore, in terms of international migrations, is not effective. Moreover, we will argue that the donor side should use different policies and other mechanisms to manage migrations from those countries
Ökumenisches Lernen macht Globales Lernen konkretÖkumenische Partnerschaften als kirchliches Angebot an die Schule
Authors: Horstmann Kai
Published: June 2017

Globales Lernen, Bildung für Nachhaltige Entwicklung, Ökumenisches Lernen: Im Vergleich der Konzeptionen wird die Besonderheit des Ökumenischen Lernens herausgestellt, auf die Komplexität des Globalen didaktisch nicht mit Reduktion und Abstraktion, sondern mit Konkretion zu reagieren.

Ökumenisches Lernen mit Schulpartnerschaften bietet eine ausgezeichnete Chance, die Globalität konkret zu erkunden und die universale menschliche Gemeinschaft exemplarisch zu erfahren. Schulpartnerschaften in Kooperation insbesondere mit kirchlichen Partnerschaften können die Wahrnehmung der Globalität auch in den Gemeinden fördern, in denen die globalen Herausforderungen aktuell kaum eine Rolle spielen.
Tschernobyl als Thema der Theologie und Religionspädagogik? Überlegungen anhand des Buches „Tschernobyl. Eine Chronik der Zukunft“ von Swetlana Alexijewitsch
Authors: Danilovich Yauheniya
Published: June 2017

Das Thema Tschernobyl erfährt in der Öffentlichkeit nur punktuell Aufmerksamkeit. Anhand des Buches von Swetlana Alexijewitsch

Swetlana Alexandrowna Alexijewitsch ist eine weißrussische Schriftstellerin. 2015 hat sie den Literaturnobelpreis für ihr Werk erhalten.

„Tschernobyl. Eine Chronik der Zukunft“ wird die Frage untersucht, ob Tschernobyl ein Thema der Theologie und Religionspädagogik ist. Es wird aufgezeigt, inwiefern die Auseinandersetzung mit Tschernobyl sich gleich mit mehreren „klassischen“ Bereichen der religiösen Bildung überschneidet.
Sui testi romanzi medievali in grafia greca come fonte di informazione linguistica
Authors: Maggiore Marco
Published: June 2017

Medieval Romance texts in the Greek alphabet are generally considered a very reliable source of information about spoken vernacular varieties, mainly due to the intrinsic independence of their writers from the Latin graphic tradition. Nevertheless, as first observed by Alberto Varvaro and Anna Maria Compagna in 1983, these valuable documents, like any other kind of written evidence, are not immune from some degree of conventionality. This paper will focus on the problems raised by the codification of Romance languages in the Greek alphabet, which requires the study of multilingualism, language contact and coexistence of different (written and oral) cultural traditions. Exemplification will come from Italo-Romance texts produced in Sicily and Southern Italy before 1500, but also from texts of other Romance areas like the Gallo-Romance 13th Century Credo studied by Rocco Distilo (1990).
Le fragment de Salzbourg du Tristan en prose, avec des remarques sur la tradition manuscrite du roman
Authors: de Carné Damien
Published: June 2017

The manuscript fragment of the Prose Tristan that belongs to the Salzburg University Library is republished here with an extensive critical apparatus taking into account almost every accessible manuscript and every textual variant. This study, possible thanks to the brevity of the fragment, provides a clearer picture of the relationship between the Tristan manuscripts for this part of the romance, and examines how some witnesses that have barely been considered before in scholarship are linked. As for the text of the Salzburg manuscript itself, it occupies a rather unexpected position, since it proves difficult to classify as one version or another and may bear witness to a very early stage in the rewritings of this short episode.
The Italian sources of the Catalan translation of Ovid’s Metamorphoses by Francesc Alegre (15th c.)
Authors: Prades Gemma Pellissa
Published: June 2017

The singularity of Francesc Alegre’s translation of Ovid’s Metamorphoses into Catalan has been associated with its dependence on the Latin poem in contrast to the other versions of this text that circulated in print prior to 1500. This article argues that the Catalan translation is the work of a learned author who places himself in relation to the Italian tradition and draws on different sources to complete a work influenced by humanist ideas. Moreover, the evidence strongly supports the impact of Giovanni Bonsignori’s Ovidio Metamorphoseos Vulgare (c. 1375–1377) throughout the fifteen books of Alegre’s translation and in his allegorical interpretations in the second part of the work. I also contend that he may have known the Expositio and the Allegorie written by Giovanni del Virgilio (1322–1323).
A High-Density Genetic Linkage Map and QTL Fine Mapping for Body Weight in Crucian Carp (Carassius auratus) Using 2b-RAD Sequencing
Authors: Liu Haiyang , Fu Beide , Pang Meixia , Feng Xiu , Yu Xiaomu , Tong Jingou
Published: June 2017

A high-resolution genetic linkage map is essential for a wide range of genetics and genomics studies such as comparative genomics analysis and QTL fine mapping. Crucian carp (Carassius auratus) is widely distributed in Eurasia, and is an important aquaculture fish worldwide. In this study, a high-density genetic linkage map was constructed for crucian carp using 2b-RAD technology. The consensus map contains 8487 SNP markers, assigning to 50 linkage groups (LGs) and spanning 3762.88 cM, with an average marker interval of 0.44 cM and genome coverage of 98.8%. The female map had 4410 SNPs, and spanned 3500.42 cM (0.79 cM/marker), while the male map had 4625 SNPs and spanned 3346.33 cM (0.72 cM/marker). The average recombination ratio of female to male was 2.13:1, and significant male-biased recombination suppressions were observed in LG47 and LG49. Comparative genomics analysis revealed a clear 2:1 syntenic relationship between crucian carp LGs and chromosomes of zebrafish and grass carp, and a 1:1 correspondence, but extensive chromosomal rearrangement, between crucian carp and common carp, providing evidence that crucian carp has experienced a fourth round of whole genome duplication (4R-WGD). Eight chromosome-wide QTL for body weight at 2 months after hatch were detected on five LGs, explaining 10.1–13.2% of the phenotypic variations. Potential candidate growth-related genes, such as an EGF-like domain and TGF-β, were identified within the QTL intervals. This high-density genetic map and QTL analysis supplies a basis for genome evolutionary studies in cyprinid fishes, genome assembly, and QTL fine mapping for complex traits in crucian carp.
Constraints on eQTL Fine Mapping in the Presence of Multisite Local Regulation of Gene Expression
Authors: Zeng Biao , Lloyd-Jones Luke R , Holloway Alexander , Marigorta Urko M , Metspalu Andres , Montgomery Grant W , Esko Tonu , Brigham Kenneth L , Quyyumi Arshed A , Idaghdour Youssef , Yang Jian , Visscher Peter M , Powell Joseph E , Gibson Greg
Published: June 2017

Expression quantitative trait locus (eQTL) detection has emerged as an important tool for unraveling of the relationship between genetic risk factors and disease or clinical phenotypes. Most studies use single marker linear regression to discover primary signals, followed by sequential conditional modeling to detect secondary genetic variants affecting gene expression. However, this approach assumes that functional variants are sparsely distributed and that close linkage between them has little impact on estimation of their precise location and the magnitude of effects. We describe a series of simulation studies designed to evaluate the impact of linkage disequilibrium (LD) on the fine mapping of causal variants with typical eQTL effect sizes. In the presence of multisite regulation, even though between 80 and 90% of modeled eSNPs associate with normally distributed traits, up to 10% of all secondary signals could be statistical artifacts, and at least 5% but up to one-quarter of credible intervals of SNPs within r2 > 0.8 of the peak may not even include a causal site. The Bayesian methods eCAVIAR and DAP (Deterministic Approximation of Posteriors) provide only modest improvement in resolution. Given the strong empirical evidence that gene expression is commonly regulated by more than one variant, we conclude that the fine mapping of causal variants needs to be adjusted for multisite influences, as conditional estimates can be highly biased by interference among linked sites, but ultimately experimental verification of individual effects is needed. Presumably similar conclusions apply not just to eQTL mapping, but to multisite influences on fine mapping of most types of quantitative trait.
Up-Frameshift Protein UPF1 Regulates Neurospora crassa Circadian and Diurnal Growth Rhythms
Authors: Wu Yilan , Zhang Yin , Sun Yunpeng , Yu Jiali , Wang Peiliang , Ma Huan , Chen Shijunyin , Ma Lizhen , Zhang Dongyang , He Qun , Guo Jinhu
Published: June 2017

Nonsense-mediated RNA decay (NMD) is a crucial post-transcriptional regulatory mechanism that recognizes and eliminates aberrantly processed transcripts, and mediates the expression of normal gene transcripts. In this study, we report that in the filamentous fungus Neurospora crassa, the NMD factors play a conserved role in regulating the surveillance of NMD targets including premature termination codon (PTC)-containing transcripts and normal transcripts. The circadian rhythms in all of the knockout strains of upf1-3 genes, which encode the Up-frameshift proteins, were aberrant. The upf1 knockout strain displays a shortened circadian period, which can be restored by constantly expressing exogenous Up-frameshift protein 1 (UPF1). UPF1 regulates the circadian clock by modulating the splicing of the core clock gene frequency (frq) through spliceosome and spliceosome-related arginine/serine-rich splicing factors, which partly account for the short periods in the upf1 knockout strain. We also demonstrated that the clock genes including White Collar (WC)-1, WC-2, and FRQ are involved in controlling the diurnal growth rhythm, and UPF1 may affect the growth rhythms by mediating the FRQ protein levels in the daytime. These findings suggest that the NMD factors play important roles in regulating the circadian clock and diurnal growth rhythms in Neurospora.
AN INTRODUCTION AND BACKGROUND TO THE BAITFISH RESEARCH PROJECT IN EASTERN INDONESIA
Authors: Blaber S..J.M.
Published: June 2017

Pole-and-line fishing for tuna is a multi-million dollar industry in eastern Indonesia that employs many people, supports several canneries and generates export income.
REPRODUCTIVE BIOLOGY OF ANCHOVIES (Encrasicltolina heterolobzs AND Encrasicholina devisi) FROM BACAN, MALUKU
Authors: Andamari Retno , Milton David
Published: June 2017

The repoductive biology of the anchovies, Enerasicholina heterolobus and E. devisi at Bacan were compered with published data from other parts of their geographic range. Sampling was carried out in April.
GONAD MATURITY STAGES OF ANCHOVIES (Encrasicholina heterolobus) FROM BACAN ISLAND
Authors: Andarmari Retno , Farmer Margaret , Khodriyah Umi , Susanto Andriko N.
Published: June 2017

The gonad maturity stages of anchovies (Enrasirholina hetentlobus) used as tuna baitfish were examined in the waters of Bacan Island. The species is a multiple spawner with asynchrounous oocyte development.
DEVELOPMENT STAGE, AGEING AND NATURAL MORTALITY OF ANCHOVY EGGS (Encrasicholina SPECIES) FROM BACAN
Authors: Andamari Retno , Susanto Andriko N. , Milton David A.
Published: June 2017

ln order to study the possible application of the Daily Egg Production Method (DEPM) for estimating anchovy (Encrasicholina spp.) biomass at Bacan. Maluku, we collected a large series of plankton samples.
Limiares térmicos para a germinação de conídios de Exserohilum turcicum
Authors: Camera Juliane Nicolodi , Deuner Carolina Cardoso
Published: June 2017

RESUMO O milho (Zea mays L.) é cultivado em todo o Brasil e apresenta grande importância econômica, dentre as doenças que causam redução na produtividade está a helmintosporiose. O objetivo deste trabalho foi avaliar a germinação de conídios do agente causal da helmintosporiose, Exserohilum turcicum, em diferentes temperaturas e diferentes regimes luminosos, para determinar os limiares térmicos inferior e superior e a temperatura ótima para a germinação. As temperaturas avaliadas foram 0; 5; 10; 15; 20; 25; 30; 35 e 40 °C, com tempos de exposição de 3, 6, 9 e 12 horas. Após cada tempo de exposição, determinou-se o número de conídios germinados e o comprimento do tubo germinativo. O delineamento experimental foi inteiramente casualizado, com quatro repetições, e os dados obtidos foram submetidos à análise de variância. Para os conídios de E. turcicum, submetidos à luz contínua, verificou-se que a maior taxa de germinação ocorreu na temperatura de 23,3 °C, para o tempo de exposição de três horas; na de 22,3 °C, para seis horas; na de 21,8 °C, para nove horas e, na de 21,7 °C, para 12 horas. Para o escuro contínuo, a maior taxa de germinação foi verificada na temperatura de 24,0 °C, para o tempo de exposição de três horas, na de 22,5 °C, para seis horas; na de 21,8 °C para nove horas e, na de 21,7 °C, para 12 horas. Os esporos de E. turcicum germinaram numa faixa de temperatura de 0 a 40 °C, sendo a temperatura ótima de 23 °C. O escuro favoreceu a germinação dos esporos de E. turcicum.
Patterns of gall infestation in Heteropterys byrsonimifolia A. Juss. in a forest-savannah ecotone
Authors: Terra Marcela de Castro Nunes Santos , Santos Rubens Manoel dos , Carvalho Warley Augusto Caldas , Coelho Polyanne Aparecida , Reis Geovany Heitor , Moreira Aline Martins
Published: June 2017

ABSTRACT Galls are the result of a specific interaction between an inducer and a host plant. The species Heteropterys byrsonimifolia A. Juss. occurs in abundance in semideciduous seasonal forest ecotones and adjacent open formations. In the ecological reserve Quedas do Rio Bonito, located in the state of Minas Gerais, Brazil, this species is affected by a single gall morphotype. The present study aimed to evaluate whether the structural complexity of the host (test of the structural complexity hypothesis) and the distance between hosts (test of the resource concentration hypothesis) affect gall density in H. byrsonimifolia and to characterize the spatial distribution of the infestation. The results corroborate the two hypotheses tested, suggesting a metapopulation pattern of gall infestation in H. byrsonimifolia. Gallers were more successful in abrupt forest-savannah transition environments, which may be associated with greater stress-induced host vulnerability that plants usually experience in ecotones.
Culinary and nutritional quality of common bean lines with Carioca grain type and interaction with environments
Authors: Pereira Helton Santos , Alvares Renata Cristina , Melo Leonardo Cunha , Costa Antônio Félix da , Carvalho Hélio Wilson Lemos de
Published: June 2017

ABSTRACT The objectives of this work were to study the genetic variability and the interaction between genotypes and environments for cooking time and protein content of bean grains as well as to identify elite lines of Carioca grain type with short cooking time, high protein content and high adaptability and stability for these two traits. Sixteen experiments were conducted in a complete randomized block design with three replications during the rainy, dry and winter seasons, in Goiás, Distrito Federal, Pernambuco, Sergipe, Bahia and Paraná States, in 2009 and 2010. Each trial was composed by 16 elite lines of Carioca grain type and the data of cooking time and protein content were obtained. Data were submitted to analysis of variance and to stability and adaptability analysis, according to the methodology proposed by Annichiarico. Genetic variability was found for cooking time and for protein content among Carioca common bean elite lines; however, for protein content this variability is lower. The environmental effect is important for the expression of these traits and is larger than the genetic effect. The interaction between genotypes and environments is important for cooking time and for protein content of common beans. The lines CNFC 11951 and CNFC 11962 presents short cooking time, high protein content and high stability and adaptability for both traits.
Environment-specific selection to identify high yielding wheat genotypes and response to fungicide application
Authors: Benin Giovani , Storck Lindolfo , Marchioro Volmir Sergio , Bornhofen Elesandro , Woyann Leomar Guilherme , Trevizan Diego Maciel
Published: June 2017

ABSTRACT Selection of disease resistant genotypes is the main goal of wheat (Triticum aestivum L.) breeding programs. However, because of the lack of genotypes resistant to all diseases and the strong influence of the environment on the level of resistance of the genotypes, the use of fungicides is necessary in the cultivation of wheat. The objective of this study was to compare the gain in yield and the selection efficiency of wheat genotypes due to the fungicide application in trials carried out in different sites and years. This study used grain yield data from 816 wheat genotypes evaluated in 248 advanced trials at eight sites during the years from 2004 to 2012. The gain resulting from fungicide application for a given genotype was estimated by the difference between yield of plots on which fungicide was applied and control treatment. The greatest gains with fungicide application were observed in sites with lower average temperatures and higher rainfall indices, such as Campo Mourão, Castro, Não-Me-Toque and Guarapuava. On the other hand, the lowest gains with fungicide application occurred in Dourados and Palotina, environments where crops in general suffer water stress and present higher average temperatures. The year effect resulted in yield increases due to fungicide application ranging from 16.9 to 60.7%. The selection and evaluation of the response to the application of fungicide in wheat should be environment-specific to maximize the use of genotype x environment interaction.
Silagem de capim-elefante adicionada de casca de abacaxi
Authors: Bonfá Caroline Salezzi , Villela Severino Delmar Junqueira , Castro Gustavo Henrique de Frias , Santos Roseli Aparecida dos , Evangelista Antônio Ricardo , Pires Neto Otaviano de Souza
Published: June 2017

RESUMO Neste trabalho, foram avaliadas as características fermentativas e químico-bromatológicas da silagem de capim-elefante (CE) com diferentes níveis de inclusão, durante a ensilagem, do coproduto da extração da polpa do abacaxi, a casca de abacaxi (CA), nas proporções de 0,0; 12,5; 25,0; 37,5 e 50,0%, da matéria natural do capim-elefante. O material foi ensilado em silos laboratoriais e, após 180 dias, os silos foram abertos e coletaram-se amostras para a determinação dos teores de matéria seca (MS); carboidratos solúveis (CHOS); potencial hidrogeniônico (pH); nitrogênio amoniacal em percentagem do nitrogênio total (NNH3/NT); extrato etéreo (EE); proteína bruta (PB); proteína insolúvel em detergente neutro em percentagem do nitrogênio total (PIDN/NT); proteína insolúvel em detergente ácido em percentagem do nitrogênio total (PIDA/NT); fibra em detergente neutro (FDN); fibra em detergente ácido (FDA); celulose (CEL); lignina (LIG); nitrogênio insolúvel em detergente neutro (NIDN); nitrogênio insolúvel em detergente ácido (NIDA) e digestibilidade in vitro da matéria seca (DIVMS). Para a avaliação do efeito dos tratamentos, utilizou-se delineamento experimental inteiramente casualizado, com quatro repetições, executando-se o estudo de regressão para cada variável analisada (P < 0,05). De acordo com as equações de regressão, para as características fermentativas, as silagens podem ser consideradas de muito boa qualidade. Quanto às frações fibrosas da silagem, a inclusão de níveis crescentes deste coproduto contribuiu para diminuí-las, o que pode ser confirmado pelos resultados encontrados para a DIVMS. A inclusão da CA durante a ensilagem do capim-elefante favorece a fermentação e melhora o valor nutritivo das silagens, sendo recomendada em todos os níveis de inclusão avaliados.