bluuebunny/crossref_metadata_2025 huggingface dataset:
Differential DNA damage signalling and apoptotic threshold correlate with mouse epiblast-specific hypersensitivity to radiation
Authors: Laurent Audrey , Blasi Francesco
Published: September 2015

Between implantation and gastrulation, the mouse pluripotent epiblast cells expand enormously and exhibit a remarkable hypersensitivity to DNA damage. Upon low dose irradiation, they undergo mitotic arrest followed by p53-dependent apoptosis, while the other cell types simply arrest. This protective mechanism, active exclusively after e5.5 and lost during gastrulation, ensures the elimination of every mutated cell before its clonal expansion, and is therefore expected to greatly increase individuals' fitness.

We show that the insurgence of apoptosis relies on the epiblast-specific convergence of both increased DNA damage signalling and stronger pro-apoptotic balance. Although upstream Atm/Atr global activity and specific γH2AX phosphorylation are similar in all cell types of the embryo, 53BP1 recruitment at DNA breaks is immediately amplified only in epiblast cells after ionizing radiation. This correlates with a rapid epiblast-specific activation of p53 and its transcriptional properties. Moreover, between e5.5 and e6.5, epiblast cells lower their apoptotic threshold by overexpressing pro-apoptotic Bak and Bim and repressing the anti-apoptotic Bcl-xL. Thus even after low dose irradiation, the cytoplasmic priming of epiblast cells allows p53 to rapidly induce apoptosis via a partially transcription-independent mechanism.
Escape of X-linked miRNA genes from meiotic sex chromosome inactivation
Authors: Sosa Enrique , Flores Luis , Yan Wei , McCarrey John R.
Published: September 2015

Past studies indicated that transcription of all X-linked genes is repressed by Meiotic Sex Chromosome Inactivation (MSCI) during the meiotic phase of spermatogenesis in mammals. However more recent studies showed an increase in steady-state levels of certain X-linked miRNAs in pachytene spermatocytes suggesting that either synthesis of these miRNAs increases or that degradation of these miRNAs decreases dramatically in these cells. To distinguish between these possibilities, we performed RNA-FISH to detect nascent transcripts from multiple miRNA genes in various spermatogenic cell types. Our results show definitively that Type I X-linked miRNA genes are subject to MSCI, as are all or most X-linked mRNA genes, whereas Type II and III X-linked miRNA genes escape MSCI by continuing ongoing, active transcription in primary spermatocytes. We corroborated these results by co-localization of RNA-FISH signals with both a corresponding DNA-FISH signal and an immunofluorescence signal for RNA pol II. We also found that X-linked miRNA genes that escape MSCI locate non-randomly to the periphery of the XY body whereas genes that are subject to MSCI remain located within the XY body in pachytene spermatocytes, suggesting the mechanism of escape of X-linked miRNA genes from MSCI involves their relocation to a position outside of the repressive chromatin domain associated with the XY body. The fact that Type II and III X-linked miRNA genes escape MSCI suggests an immediacy of function of the encoded miRNAs specifically required during the meiotic stages of spermatogenesis.
Effect of Cobalt Addition on the Activity of Nanocrystalline Iron Catalysts in the Cracking of Methane Reaction
Authors: Maj Kamila , Kocemba Ireneusz , Lendzion-Bieluń Zofia , Arabczyk Walerian
Published: September 2015

The effect of cobalt addition on the activity of nanocrystalline iron catalysts in the cracking of methane reaction is studied. The composition and properties of the catalyst were determined by inductively coupled plasma optical emission spectrometry, X-ray diffraction and temperature-programmed reduction methods. The activity of the catalyst in the reaction was defined by measuring the concentration of hydrogen, which was determined by gas chromatography. After cracking of methane reaction, the sample coated with a carbon deposit was examined with scanning electron microscope with energy-dispersive spectrometer. The reaction yield in the direction of hydrogen acquisition for the catalyst with cobalt was above 80%, and after the regeneration process, the catalyst was still active at a very high level. The reaction path for the catalyst without the cobalt addition was performed in two steps, and the catalyst after the reaction was non-regenerative.
Sorption Properties of Carbonaceous Adsorbents Obtained by Pyrolysis and Activation of Pistachio Nut Shells
Authors: Nowicki Piotr , Bazan Aleksandra , Kazmierczak-Razna Justyna , Pietrzak Robert
Published: September 2015

A series of carbonaceous adsorbents was obtained by physical and chemical activation of pistachio nut shells. The effect of activation method on the textural, acid–base and adsorption properties of the materials obtained was tested. The materials prepared were characterized by iodine and methylene blue removal at room temperature. Depending on the procedure of activation, the final products were microporous activated carbons of surface area varying from 530 to 1204 m2/g, exhibiting diverse acidic–basic surface character. The results obtained in this study prove that a suitable choice of the activation procedure for agricultural waste materials permits production of low-cost adsorbents characterized by very high adsorption capacity towards iodine and methylene blue (1280 and 400 mg/g, respectively).
Benzene and Methane Adsorption on Ultrahigh Surface Area Carbons Prepared from Sulphonated Styrene Divinylbenzene Resin by KOH Activation
Authors: Choma Jerzy , Osuchowski Łukasz , Dziura Aleksandra , Marszewski Michal , Jaroniec Mietek
Published: September 2015

A commercially available styrene divinylbenzene ion-exchange resin, Amberjet 1200 H, was used to prepare a series of activated carbons through carbonization and subsequent activation with varying amounts of KOH. The resulting activated carbons showed a well-developed porous structure with specific surface area in the range of 730–3870 m2 g−1, total pore volume in the range of 0.44–2.07 cm3 g−1 and micropore volume in the range of 0.30–1.59 cm3 g−1. Importantly, these structural parameters can be changed by varying the amount of KOH used for the activation. These carbons showed extremely good adsorption properties towards benzene and methane at 20°C. The best uptakes for benzene and methane (19.6 and 1.68 mmol g−1, respectively) were obtained for the carbon activated using the KOH/C ratio of 4. These values correspond to the gravimetric adsorptions of 1.53 g/g and 27 mg/g, respectively. Benzene adsorption was analyzed using the Dubinin–Radushkevich (DR) equation. The micropore volume calculated using the DR equation based on benzene adsorption corresponds well with the micropore volume calculated from nitrogen adsorption by the αs comparative method. The high values of the structural parameters and the resulting high benzene and methane uptakes render the obtained activated carbons as prospective materials for use in environmental remediation and energy-related applications such as volatile organic compound adsorption and methane storage.
Effect of Carbon Nanotubes Surface Modification on Structure of Forcibly Ordered Films of Filled Polystyrene
Authors: Bolbukh Yuliia , Gunko Galyna , Maciejewska Małgorzata , Prykhod'ko Gennadij , Gawdzik Barbara , Tertykh Valentyn
Published: September 2015

The effect of surface modification of multi-walled carbon nanotubes (MWCNTs) with different modifiers on the filler dispersibility in polystyrene and the influence of the external magnetostatic field on the structure of obtained composites have been studied. The surface modification of as-synthesised and oxidized carbon nanotubes was performed by treatment with hydrochloric acid or ammonia hydroxide solutions. The composite films were casted on glass plates with or without the influence of magnetostatic field at the desired directions of the magnetic lines. A combination of MWCNTs surface treatment and directed influence of the magnetostatic field was shown to be an effective route to change the structure of composites.
Steam Reforming of Ethanol over Manganese and Iron Oxides for Hydrogen Production
Authors: Dolgykh Lidiya Yu. , Stolyarchuk Irina L. , Staraya Larisa A. , Vasylenko Inna V. , Pyatnitsky Yuri I. , Strizhak Peter E.
Published: September 2015

MnO, Mn2O3, Fe2O3 and Fe3O4 are catalytically active for the steam reforming of ethanol. The main reaction products were acetaldehyde, acetone, CO2 and H2 in the temperature range of 300–550°C. At low temperatures, high selectivity for acetone (up to 75%) was observed for MnO. Based on the study results, the relation between product selectivity of the oxide catalysts and their acid–base/redox properties balance is suggested. The selectivity for hydrogen was about 80% for Fe2O3 at 550°C with 100% ethanol conversion.
Observed Intraseasonal and Interannual Variability of Arabian Sea Warm Pool along the Gulf of Aden to Strait of Malacca shipping Lane during 1951–2010
Authors: Rao R.R. , Jitendra M. , Sivakumar R. , Ramakrishna S.S.V.S.
Published: September 2015

All the available historic surface marine meteorological data collected from Voluntary Observing Ships (VOS) in the tropical Indian Ocean during the period 1951–2010, archived by National Centre for Atmospheric Research, Boulder, Colorado, USA are assembled, quality controlled, processed and analyzed. Data for all the meteorological parameters stratified into 4° latitude by 1° longitude boxes, over five day durations, for all the 60 years are quality controlled, averaged and analyzed to portray the observed spatio-temporal evolution of all these parameters as Hovmoller diagrams for the Gulf of Aden to Strait of Malacca shipping lane. Two dimensional machine contouring is carried out with appropriate colour shading intensities to highlight the maxima and minima in the analyzed fields. The observed intraseasonal and interannual variability of these parameters is characterized along this shipping lane. These analyzed distributions amply highlight the observed variability of the surface meteorological parameters both on intraseasonal and interannual time scales during 1951–2010. Composites of SST and other marine meteorological parameters for strong and weak ASWP regimes, for strong and weak monsoon years, for El Nino (+1Y) and La Nina (+1Y) years and for Positive and Negative IOD (+1Y) years are presented.
Analysis of sustainability for socio-economic systems of the Russian Federation regions
Authors: Лукина Анастасия , Lukina Anastasiya
Published: September 2015

The article is devoted to sustainable development and sustainable growth of socio-economic systems of Russian regions. It is stated that to manage the sustainable growth it is necessary to develop a comprehensive approach to analyze the sustainability of socio-economic systems of the Russian regions. The author proposes a model for assessing the sustainability of the socio-economic system of the region and the technique and algorithm for estimating the sustainability of subjects of the Russian Federation. He develops the integral indexes for each factor of sustainability. The maps of sustainability for results visualization and development of managerial decisions are given.
Conceptual issues of innovation system management
Authors: Гамидуллаева Лейла , Gamidullaeva Leyla , Васин Сергей , Vasin Sergey
Published: September 2015

The authors studied various theoretical and methodological approaches to the problem of innovation system management and shaping of innovation policy. Essential features of these specific approaches and their weaknesses were allocated. It is concluded that in the practice of public administration it is expedient combination of the various approaches for realizing the full potential of public administration and management to build an innovation economy. The necessity of consistent and concerted macroeconomic and innovation policy established. The innovation policies should be designed taking into account the patterns of long-term economic growth, the global trends of innovative development of the economy as well as available competitive advantages of each country and every region.
Cognitive modeling of backbone factors of corporate governance in Russia
Authors: Панфилова Елена , Panfilova Elena , Причина Дарья , Prichina Darya
Published: September 2015

The article deals with the specifics of the main factors of quality of corporate governance in the Russian Federation on the basis of global trends in corporate reporting "standardization" and "mathematization" of administrative decisions. The use of fuzzy cognitive maps in addition to the cognitive matrix, gives visibility and visualization semi factors allowing, with varying degrees of detail to systematize them as a target-driven, intermediate, promote and prevent. According to the Russian scientific community, among the 35 parameters, affecting the quality of corporate governance, according to the cognitive analysis to the dominant factors of mutual discord are the following: 1) inefficient system of quality management; 2) high transaction costs of interaction between participants of corporate governance; 3) concealment of material information; lack of a clear separation of functions of control and management stock ownership; 4) low standard of living; 5) low organization of monitoring and control in the redistribution of resources companies. The article concluded that cognitive modeling tools enable us to obtain qualitative information, which increases the level of soundness and integrity management solutions in the field of semi-parameters of corporate governance.
Improving risk management in the construction industry of Krasnodar region
Authors: Калитко Светлана , Kalitko Svetlana , Гайдук Владмир , Gayduk Vladmir , Астахова Елена , Astakhova Elena
Published: September 2015

Types of risks in the construction industry specified. The estimation and ranking of types of risks in the construction industry of Krasnodar region are given. The risk management system in the construction industry of Krasnodar region analyzed. In order to improve the risk management needs the creation of the bridge department of risk management in the Ministry of Construction, architecture and road infrastructure of the Krasnodar Territory, as well as the organizations of the industry are justified. Project to diversify productive activities as a way to reduce the risks in the construction sector organizations of Krasnodar region are proposed and justified.
The problems of the youth labor market in the Republic of Kazakhstan
Authors: Нижегородцев Роберт , Nizhegorodtsev Robert , Пестунова Галина , Pestunova Galina
Published: September 2015

The problems of employmentare still crucial fora labor market in Kazakhstan, despite of the overall unemployment rate decreasing in the country. At the same time, youth employmentis out of proper attention today. A number of disclosed problems shows that instruments of governmentadjustmentfor graduates’ placement in the labor market are not sufficient. The paper discusses youth employment in a labor market in the Republic of Kazakhstan, identifies problems of youth employment, as well as suggestssome remedies for them.
Design and Control of Public-Service Contracts and an Application to Public Transportation Systems
Authors: Lodi Andrea , Malaguti Enrico , Stier-Moses Nicolás E. , Bonino Tommaso
Published: September 2015

Until the end of the 20th century it was common that cities organized, financed, and managed their own public transportation systems. More recently (in Italy mainly during the last decade), many countries liberalized the service provision of public transportation. Although offering local public transportation is a political and financial duty of governments, the service provision is outsourced to a private operator, while the government retains a control position, given to a regulatory agency. This is a common scheme not only in transportation. In close collaboration with the public transportation agency of the city of Bologna, Italy, we designed a methodology to optimize some aspects of the contractual relationship between that agency and the bus operator. We focus on the fines specified by the contract when the operator fails to comply with the service level it has agreed to provide, and on a procedure to measure that service level. Our approach has the advantage that it aligns the incentives of both parties to the benefit of bus riders. We model the agency–operator relationship as a multistage game and find its equilibrium to establish the best operating regime. The game-theoretical approach provides expressions for the fines that the operator should be charged if it does not satisfy the contracted services, and for the optimal agency’s budget to devote to control activities. Second, to check the compliance of the operator with the schedule specified by the contract in a resource-efficient way, we compute how to position the agency’s employees to verify if buses are running according to the specifications of the contract. This is achieved by counting bus services and by checking other quality indicators. We formulate this NP-hard problem as a mixed integer linear program and propose an algorithm to solve it that is effective in providing itineraries for the controllers working for the agency.

This paper was accepted by Dimitris Bertsimas, optimization.
Does Regulatory Certification Affect the Information Content of Credit Ratings?
Authors: Bruno Valentina , Cornaggia Jess , Cornaggia Kimberly J.
Published: September 2015

We exploit an investor-paid rating agency’s designation as a Nationally Recognized Statistical Rating Organization (NRSRO) to test whether this certification affects the agency’s information production. We use a certified issuer-paid agency as a benchmark and find robust evidence that the investor-paid agency’s ratings policy—both timelier and more symmetric with respect to positive and negative information—persists after it became certified for regulatory compliance. Our results suggest that ratings policy is more a function of rating agency compensation structure than the NRSRO certification by the U.S. Securities and Exchange Commission.

This paper was accepted by Gustavo Manso, finance.
Blinding Us to the Obvious? The Effect of Statistical Training on the Evaluation of Evidence
Authors: McShane Blakeley B. , Gal David
Published: September 2015

Statistical training helps individuals analyze and interpret data. However, the emphasis placed on null hypothesis significance testing in academic training and reporting may lead researchers to interpret evidence dichotomously rather than continuously. Consequently, researchers may either disregard evidence that fails to attain statistical significance or undervalue it relative to evidence that attains statistical significance. Surveys of researchers across a wide variety of fields (including medicine, epidemiology, cognitive science, psychology, business, and economics) show that a substantial majority does indeed do so. This phenomenon is manifest both in researchers’ interpretations of descriptions of evidence and in their likelihood judgments. Dichotomization of evidence is reduced though still present when researchers are asked to make decisions based on the evidence, particularly when the decision outcome is personally consequential. Recommendations are offered.

This paper was accepted by Yuval Rottenstreich, judgment and decision making.
Ground-dwelling ant assemblages (Family: Formicidae) in six coconut (Cocos nucifera L. 1753) plantations in Sri Lanka
Authors: Dias Ratnayake K. S. , Peiris Hetti A. W. S.
Published: September 2015

The contribution of six well-established coconut plantations to the conservation of biodiversity, specifically of ants, was investigated using soil sifting, timed hand collection and honey baiting along five, 100 m transects established in each plantation. Twenty honey-baited pitfall traps were set throughout each sampling area of each plantation. Collected worker ants were preserved in 70% ethanol and sorted and identified to the furthest possible taxonomic levels under a low-power stereo-microscope. The ant species observed at the five transects in each plantation were tabulated and species richness and proportional abundance of each species at each plantation were recorded. The Shannon-Wiener Diversity index for the ant assemblage at each plantation was calculated. Air and soil temperature, soil humidity and soil pH at each locality were also measured. A diverse ant assemblage occurred at each plantation, where between 19 and 29 species in 4 or 5 subfamilies were recorded; the Shannon-Wiener diversity index values were determined. Higher proportions of formicines and myrmicines than those of other subfamilies were observed. Two or more species in higher proportions than the rest of the ants occurred in each assemblage. Also, the six plantations shared three species and five plantations shared nine species in common. The considerable diversity of ants indicated a healthy environment and provided insight into the presence of other animals in the well-established coconut plantations.
Representações Sociais da Velhice
Authors: Daniel Fernanda , Antunes Anna , Amaral Inês
Published: September 2015

O estudo analisa as representações da velhice a partir de uma amostra de idosos/as e de cuidadores formais. Os instrumentos utilizados na recolha dos dados foram o Inquérito por Questionário e o Teste de Associação Livre de Palavras. A hipótese de trabalho que formulámos é a de que a representação da velhice, sendo uma construção social, traduz uma conceptualização negativa induzida pela consciência coletiva da sociedade marcadamente caracterizada por uma ideia negativa da velhice enquanto figuração do fim da vida ativa. Em concordância com a nossa hipótese de trabalho, os resultados revelam a prevalência de estereotipia idadista negativa associando-se a velhice, em ambos os grupos investigados, a atributos de cariz avaliativo negativo nomeadamente solidão, doença e dependência. As representações aferidas não serão alheias ao modelo societário que é maléfico para a velhice, onde se rejeita o que é velho (Bosi, 1983). É, contudo, nossa convicção que as melhorias verificadas na qualidade de vida, a par da nova narrativa discursiva do envelhecimento (produtivo, saudável, bem-sucedido, positivo e ativo), poderão vir a metamorfosear o campo representacional da “velhice” aligeirando a sua carga negativa.
Plutarch’s Sympotic Forge and a Variant Reading in P.Oxy. LXXVIII 5156
Authors: Brusuelas James , Meccariello Chiara
Published: September 2015

P.Oxy. LXVIII 5156, a second century witness to Plutarch’s Quaestiones Convivales, reads τηρε[ῖ instead of the mediaeval manuscripts’ ποιεῖ at 660 c 7. The passage suggests a parallel between the effect of conversation on wine drinking and that of marble on heated iron during a puzzling metallurgical process. In this paper we identify and explain this process in the context of ancient ironworking technology, and discuss the two readings and their implications for the understanding of the simile.
Dove è stato ritrovato l’archivio di Abinneo?
Authors: Gallazzi Claudio
Published: September 2015

In the common opinion the Abinnaeus archive was found in Philadelphia. The article shows that Dionysias can be the place of the discovery of the papyri
Bericht vom 8. Deutschen Papyrologentag in Berlin
Authors: Reiter Fabian
Published: September 2015

The report informs about the 8th conference of papyrologists in Germany, which took place in Berlin in 2014 (July, 18-20), and it gives a summary of the contributions.
Computerized Station For Semi-Automated Testing Image Intensifier Tubes
Authors: Chrzanowski Krzysztof
Published: September 2015

Testing of image intensifier tubes is still done using mostly manual methods due to a series of both technical and legal problems with test automation. Computerized stations for semi-automated testing of IITs are considered as novelty and are under continuous improvements. This paper presents a novel test station that enables semi-automated measurement of image intensifier tubes. Wide test capabilities and advanced design solutions rise the developed test station significantly above the current level of night vision metrology.
Construction Of A Piezoelectric-Based Resonance Ceramic Pressure Sensor Designed For High-Temperature Applications
Authors: Belavič Darko , Bradeško Andraž , Zarnik Marina Santo , Rojac Tadej
Published: September 2015

In this work the design aspects of a piezoelectric-based resonance ceramic pressure sensor made using low-temperature co-fired ceramic (LTCC) technology and designed for high-temperature applications is presented. The basic pressure-sensor structure consists of a circular, edge-clamped, deformable diaphragm that is bonded to a ring, which is part of the rigid ceramic structure. The resonance pressure sensor has an additional element – a piezoelectric actuator – for stimulating oscillation of the diaphragm in the resonance-frequency mode. The natural resonance frequency is dependent on the diaphragm construction (i.e., its materials and geometry) and on the actuator. This resonance frequency then changes due to the static deflection of the diaphragm caused by the applied pressure. The frequency shift is used as the output signal of the piezoelectric resonance pressure sensor and makes it possible to measure the static pressure. The characteristics of the pressure sensor also depend on the temperature, i.e., the temperature affects both the ceramic structure (its material and geometry) and the properties of the actuator. This work is focused on the ceramic structure, while the actuator will be investigated later.
A Novel Design Of An NTC Thermistor Linearization Circuit
Authors: Lukić Jelena , Denić Dragan
Published: September 2015

A novel design of a circuit used for NTC thermistor linearization is proposed. The novelty of the proposed design consists in a specific combination of two linearization circuits, a serial-parallel resistive voltage divider and a two-stage piecewise linear analog-to-digital converter. At the output of the first linearization circuit the quasi-linear voltage is obtained. To remove the residual voltage nonlinearity, the second linearization circuit, i.e., a two-stage piecewise linear analog-to-digital converter is employed. This circuit is composed of two flash analog-to-digital converters. The first analog-to-digital converter is piecewise linear and it is actually performing the linearization, while the second analog-to-digital converter is linear and it is performing the reduction of the quantization error introduced by the first converter. After the linearization is performed, the maximal absolute value of a difference between the measured and real temperatures is 0.014°C for the temperature range between −25 and 75°C, and 0.001°C for the temperature range between 10 and 40°C.
Puzzle task ERP response: time-frequency and source localization analysis
Authors: Almurshedi Ahmed , Ismail Abd Khamim
Published: September 2015

Perceptual decision making depends on the choices available for the presented task. Most event-related
potential (ERP) experiments are designed with two options, such as YES or NO. In some cases, however, subjects
may become confused about the presented task in such a way that they cannot provide a behavioral response.
This study aims to put subjects into such a puzzled state in order to address the following questions: How does
the brain respond during puzzling moments? And what is the brain’s response to a non-answerable task? To
address these questions, ERP were acquired from the brain during a scintillation grid illusion task. The subjects
were required to count the number of illusory dots, a task that was impossible to perform. The results showed
the presence of N130 over the parietal area during the puzzling task. Coherency among the brain hemispheres
was enhanced with the complexity of the task. The neural generators’ source localizations were projected to
a multimodal complex covering the left postcentral gyrus, supramarginal gyrus, and angular gyrus. This study
concludes that the brain component N130 is strongly related to perception in a puzzling task network but not
the visual processing network.
An Analysis of Total Phosphorus Dispersion in Lake Used As a Municipal Water Supply
Authors: LIMA RÔMULO C. , MESQUITA ANDRÉ L.A. , BLANCO CLAUDIO J.C. , SANTOS MARIA DE LOURDES S. , SECRETAN YVES
Published: September 2015

ABSTRACTIn Belém city is located the potable water supply system of its metropolitan area, which includes, in addition to this city, four more municipalities. In this water supply complex is the Água Preta lake, which serves as a reservoir for the water pumped from the Guamá river. Due to the great importance of this lake for this system, several works have been devoted to its study, from the monitoring of the quality of its waters to its hydrodynamic modeling. This paper presents the results obtained by computer simulation of the phosphorus dispersion within this reservoir by the numerical solution of two-dimensional equation of advection-diffusion-reaction by the method θ/SUPG. Comparing these results with data concentration of total phosphorus collected from November 2008 to October 2009 and from satellite photos show that the biggest polluters of the water of this lake are the domestic sewage dumps from the population living in its vicinity. The results obtained indicate the need for more information for more precise quantitative analysis. However, they show that the phosphorus brought by the Guamá river water is consumed in an area adjacent to the canal that carries this water into the lake. Phosphorus deposits in the lake bottom should be monitored to verify their behavior, thus preventing the quality of water maintained therein.
Térmites (Insecta: Isoptera) consumidores de liteira na Ilha de Maracá, Roraima.
Authors: Bandeira Adelmar Gomes
Published: September 2015

Um estudo dos térmites consumidores de liteira de na Ilha de Maracá , Roraima, reve-lou sete. espécies : Ruptiermesreconditus R. silvestrii, Ruptiermessp.n., Syntermes chaguimayensis,S. moestus, S.parallelus,e Nasutitermes guayanae. O diâmetro médio dos cortes cirulares nas folhas foi de. 3,0 mm para S. molestus3,5 mm paia S. paral-lelus,5,5 mm para S. chaguimayesise de aproximadamente. 7 mm {quando circulares) para as, espécies de Ruptoermes e. N. guayanae,.Encontrou-se maior atividade. detritívora, principatmente do. Ruptitermes, em mata primária comparada com clareiras Os térmites consumidores de, liteira em Maracá aparentaram ter papel fundamental na remoção e incorporação da liteira fina ao solo, embora não tenha tido calculada experimentalmente a taxa desta atividade.
Passalideos (Coleoptera) da Ilha de Maracá, Roraima.
Authors: Bührnheim Paulo F. , Aguiar Nair Otaviano
Published: September 2015

Foram realizados duas excursões à Ilha de Maracá, Estação Ecológica da Secretaria Especial do Meio Ambiemte, em Roraima, Brasil, uma durante a estação chuvosa, no periodo de 03 a 13.v.1987 e a outra na estação seca de 23 a 30.xi.1987. Na primeira. foram colecionadas quatro espécies de Passalideoes (Coleoptera): PassalusglaberrimusEschsch., 1829; Passalus interruptus(Lin., 1758); Passalus interstitialisEschsch., 1829 e Verres furcilabris (Eschsch., 1829). Na segunda oportunidade, além das espécies, encontradas na primeira, foi colecionada mais uma, Paxillussp. Dados sobre a bionomia destas espéci-es, obtidos, durante os dois colecionamentos, são fornecidos e discutidos.
Flebotomíneos (Diptera: Psychodidae) no Estado de Roraima, Brasil. II. Espécies coletadas na Região Norte.
Authors: Castellón E. G. , Araújo Filho N. A. , Fé N. F. , Alves J. M. C.
Published: September 2015

Neste trabalho são reportadas pela primeira vez, as espécies de flebotomíneos acha dos no norte do Estado de Roraima, Brasil; coletadas com armadilhas CDC e Malaise. São reportadas vinte, e oito espécies na região elevando o total para cinquenta e seis conhe cidas para o Estado.
A pesquisa na biblioteca da Fundacentro na produção científica em segurança e saúde no trabalho: um estudo de caso
Authors: Laruccia Mauro Maia , Cosmano Sergio Roberto , Nardi Roberta Galasso
Published: September 2015

Este trabalho tem como objetivo analisar a contribuição da biblioteca na produção científica da Fundacentro. Utilizou-se o método survey de pesquisa para levantar os dados e abordagem qualitativa na discussão. Os resultados demonstraram que a biblioteca da Fundacentro atende às expectativas dos usuários da Instituição tanto no CTN e regionais, mas há alguns pontos que precisam ser revistos e melhorados, a fim de que ofereça plena satisfação aos pesquisadores, servidores e colaboradores e, também, a todos aqueles que se utilizam da biblioteca física ou online, bem como de seus produtos e serviços, para realização de seus trabalhos ou nas suas produções científicas.
Aspectos que interferem no acesso à informação e interação dos usuários cegos com o OPAC em bibliotecas universitárias
Authors: Lazzarin Fabiana Aparecida , Sousa Marckson Roberto Ferreira de
Published: September 2015

Apresentamos um estudo focado nos aspectos relacionados à acessibilidade à informação contida nos catálogos on-line, também conhecidos como OPAC (Online Public Access Catalogue), envolvendo tanto o ambiente digital como o ambiente físico. Analisamos através da ferramenta automática de acessibilidade Access Monitor e de revisão direta por parte dos autores o OPAC do Sistema de Gestão de Atividades Acadêmicas (SIGAA) da Universidade Federal da Paraíba e, destacamos a importância das bibliotecas universitárias adotarem medidas que contribuam para a acessibilidade dos diversos públicos, inclusive de pessoas com deficiência visual. A partir do estudo de caso, elaboramos recomendações como forma de melhorias para a interação dos usuários cegos com o OPAC de bibliotecas universitárias.
Gestão do conhecimento em projetos de simulação: um estudo bibliométrico
Authors: Pereira Tábata Fernandes , Miranda Rafael de Carvalho , Montevechi José Arnaldo Barra
Published: September 2015

O presente artigo apresenta um estudo bibliométrico sobre o tema gestão do conhecimento em projetos de simulação. Neste trabalho foi realizada uma análise envolvendo a base de dados ISI - Web of Science, identificando os principais autores, países e fontes de publicação do tema. Foi utilizado o "mapa de citações" para apresentar ao leitor como estão relacionadas as citações sobre o tema pesquisado. Foram utilizados também dois softwares de apoio a bibliometria: Stikis(r) e Ucinet(r), para identificar as principais palavras-chave do tema, visto que as bases de dados não oferecem este recurso. O procedimento da pesquisa se fundamentou em coletar os dados na base ISI - Web of Science e conduzir as análises, extraindo dessa maneira os resultados. O trabalho buscou identificar como se encontra este campo de pesquisa no meio acadêmico, e oferecer a potenciais pesquisadores da área, uma base consistente de informações para estudos sobre este tema. Ao final do trabalho, pode-se obter um conjunto de informações sobre o tema gestão do conhecimento em projetos de simulação. Apesar da importância do tema pesquisado, verificaram-se poucos trabalhos que exploram estes assuntos em conjunto, indicando ser uma área ainda a ser explorada por novas publicações.
Análise automática de citações disponíveis em arquivos XML da SciELO: o periódico "Perspectivas em Ciência da Informação" em números
Authors: Mattos Max Cirino de , Cendón Beatriz Valadares
Published: September 2015

O artigo demonstra o uso de arquivos eXtensible Markup Language (XML) da Scientific Electronic Library Online (SciELO) para a criação de uma base de citações do periódico Perspectivas em Ciência da Informação. Demonstra também o uso desta base de citações fornecendo uma visão bibliométrica desse periódico para o período em que os arquivos estavam disponíveis na SciELO: 2006 a 2014, do volume 11 edição 1 ao volume 19 edição 4, incluindo o número especial desse volume. Foram analisados 532 artigos, e os resultados mostraram 387 artigos com 10.266 citações usadas (145 artigos não apresentaram nenhuma citação). O principal objetivo do artigo é destacar a possibilidade de automação da análise bibliométrica a partir da metodologia proposta - e por esse motivo os dados são apresentados sem nenhum tipo de tratamento de desambiguação. São apresentados relatórios similares aos modelos iniciais de Garfield (1972) para o Science Citation Index (SCI): frequências de citações, estatísticas dos periódicos citados e estatísticas dos periódicos citantes. Sugere-se a disponibilização da base de citações, com atualização automática, de forma integrada ao site do periódico, e a aplicação da metodologia para outros periódicos indexados na SciELO
A small new species of Crenicichla Heckel, 1840 from middle rio Xingu, Brazil (Teleostei: Cichlidae)
Authors: Ito Priscila Madoka M. , Py-Daniel Lúcia H. Rapp
Published: September 2015

A new species of Crenicichla is described from the middle rio Xingu and tributaries, upstream from Volta Grande do Xingu. The largest specimen measured 47.8 mm SL. The new speciescan be distinguished from all other Crenicichla species by the combination of the following character states: presence of serrae on supracleithrum (diagnostic of Crenicichla wallacii species group), large caudal blotch centrally located on caudal lateral line (shared with C. urosema and C. virgatula ), vertical dark stripes on the caudal fin and up to three series of teeth on premaxilla and maxilla (vs. more than four series of teeth). The new species described hereinis the eleventh species of Crenicichla listed from the rio Xingu basin. Similarities of color pattern among small species of Crenicichla is discussed.
TEORIAS DA ORIGEM E EVOLUÇÃO DA VIDA: DILEMAS E DESAFIOS NO ENSINO MÉDIO
Authors: Porto Paulo Roberto de Araújo , Falcão Eliane Brígida Morais
Published: September 2015

Neste trabalho foram analisadas as representações sociais de um grupo de estudantes do Ensino Médio de uma escola confessional católi ca sobre a origem dos seres vivos, com destaque para o surgimento do homem e da mulher. No estudo, utilizou-se a metodologia do discurso do sujeito coletivo (DSC). Os resultados obtidos mostraram que o grupo investigado tem fortes características religiosas, mas com abertura para as explicações científicas. Seus discursos, ao revelarem influências religiosas, não indicaram que estas eram obstáculos à apreensão dos conteudos ensi nados no âmbito das ciências. Mostraram, antes, sinais de deficiência na abordagem escolar do tema. Nas representações sociais dos estudantes, as influências familiares apareceram como mais relevantes do que aquelas provenientes de atividades escolares.
CONTEXTUALIZANDO A ABORDAGEM DE RADIAÇÕES NO ENSINO DE QUÍMICA
Authors: Medeiros Miguel de Araújo , Lobato Anderson César
Published: September 2015

Este trabalho consiste em: (i) análise do conteúdo radiação em livros didáticos de Química e Física; (ii) análise das concepções prévias dos alunos sobre radiação; (iii) desenvolvimento e aplicação de um mate rial didático para suporte ao ensino e aprendizagem de radiação e (iv) aná lise do conhecimento adquirido pelos estudantes após o estudo do con teúdo. A análise dos livros didáticos de Química mostrou que radiação nuclear é o conteúdo principalmente abordado, enquanto que nos livros de Física são apresentadas principalmente ondas eletromagnéticas. Esse resultado demonstra que o conteúdo não foi ensinado de maneira eficien te. O conhecimento prévio, observado através de questionário, identificou as principais dificuldades dos alunos. Neste contexto, um material didáti co foi desenvolvido para o ensino e aprendizagem de radiação para mini mizar a ideia errada de que a radiação é prejudicial (como foi identificado em 82% das respostas dos estudantes). Através do ensino de radiações, usando esse material, e analisando os resultados deste trabalho, foi possí vel verificar que os alunos se interessam pelo assunto, reconhecendo e diferenciando vários tipos de radiação presentes no cotidiano.
VISÕES DE AUTONOMIA DO PROFESSOR E SUA INFLUÊNCIA NA PRÁTICA PEDAGÓGICA
Authors: Monteiro Marco Aurélio Alvarenga , Monteiro Isabel Cristina de Castro , Azevedo Tânia Cristina Arantes Macedo de
Published: September 2015

Atualmente muitos trabalhos têm destacado a importância do desenvolvimento da autonomia do professor para a melhoria da qualida de de ensino. Nosso trabalho buscou estudar as concepções sobre auto nomia apresentadas por professoras que atuam na Educação Infantil e nas séries iniciais do Ensino Fundamental recém-ingressas no programa de formação de professores Pedagogia Cidadã, oferecido pela Unesp. Nosso intuito é o de compreender como essas concepões contribuíam ou apre sentavam obstáculos ao desenvolvimento da profissionalidade docente segundo a visão proposta por Contreras (2002). Os resultados mostraram que as concepções, de natureza altamente individualista e solipsista, apre sentadas pelas professoras evidenciam um exercício profissional voltado apenas para questões relativas ao fazer didático-pedagógico de sala de aula.
EL USO DE ACTIVIDAD DE LATORATORIO DE BIOLOGÍA PARA LA ENSENANZA DE MATEMÁTICA EN LOS AÑOS INICIALES: UNA ESTRATEGIA INTERDICIPLINARIA DE ENSEÑANZA Y APRENDIZAJE
Authors: Bridi Jacira Helena , Sant'Ana Marilaine de Fraga , Geller Marlise , Silva Juliana da
Published: September 2015

Objetivando la interdisciplinariedad y considerándose las difi- cultades en el proceso de ensenanza y aprendizaje, este trabajo ha articu lado una propuesta metodológica entre la Biologia y la Matemática, des- arrollada con dos grupos de 4° ano de la Ensenanza Fundamental de las redes pública y particular en Brasil, donde han sido realizadas actividades prácticas de laboratorio de Ciencias. El uso del método Allium cepa como estrategia en el estudio de fracciones, medidas y gráficos ha posibilitado la observación y el registro de datos, desarrollando igualmente el razona- miento cientifico y aportando el desarrollo de destrezas manipulativas. Los resultados obtenidos en esta investigación son animadores y relevan tes, visto que el trabajo en laboratorio ha sido de gran provecho en el aprendizaje en Ciencias para los alumnos apuntados. Frente a los resulta dos, podemos observar todavia que la aplicación del test Allium cepa, a tra vés del desarrollo de modelos matemáticos, ha desencadenado cambios significativos tanto en la postura docente cuanto en la discente.
ÉTICA, CIÊNCIA E FORMAÇÃO DE PROFESSORES: A ESCOLA NA SOCIEDADE CONTEMPORÂNEA
Authors: Malacarne Vilmar , Strieder Dulce Maria , Lima Dartel Ferrari de
Published: September 2015

O presente artigo, resultante de em uma pesquisa qualitativa cujo instrumento foi a revisão bibliográfica, aborda, a partir de uma reflexão sobre o desenvolvimento da ciência e os conceitos de ética, direcionamentos para a formação de professores e para sua atuação na escola contemporânea. O texto, fundamentado nos apontamentos sobre a ciência e a ética, traz para discussão o papel da escola no processo de formação do indivíduo, considerado produtor e inserido em uma sociedade tecnológica atravancada por discussões de caráter ético. A análise aponta para a necessidade de, com maior intensidade, conjugar a ética ao processo de estruturação da ciência e aos processos de formação docente, sendo este um caminho para sua maior presença no cotidiano da escola.
LA COBERTURA DE LA CIENCIA EN LOS NOTICIEROS COLOMBIANOS: DEL ANÁLISIS DE RESULTADOS A LAS REFLEXIONES METODOLÓGICAS PARA SU INVESTIGACIÓN
Authors: Castrillón Tania Arboleda , Hermelin Daniel , Bustos Tania Pérez
Published: September 2015

Basados en los resultados de un estudio de cobertura de ciencia y tecnología en el noticiero2Noticias Caracol de Colombia, realizado entre octubre del 2009 y marzo del 2010, nos preguntamos críticamente por la marcada tendencia que esta investigación indica, en diálogo con pesquisas similares, sobre lo que parece ser una baja presencia de estas temáticas en los medios informativos latinoamericanos. Inicialmente discutimos la metodología utilizada en este estudio y otros similares. Luego nos centramos en las noticias sobre agua y medio ambiente, que son las más recurrentes en este estudio, para finalmente preguntarnos por los contextos de riesgo que éstas tácitamente evocan y que están atravesados por concepciones particulares de la ciencia y la tecnología.
POSSIBILIDADES DE ENSINO DE BOTÂNICA EM UM ESPAÇO NÃO-FORMAL DE EDUCAÇÃO NA PERCEPÇÃO DE PROFESSORAS DE CIÊNCIAS
Authors: Faria Rafaella Librelon de , Jacobucci Daniela Franco Carvalho , Oliveira Renata Carmo
Published: September 2015

O interesse por atividades e locais diferenciados para o ensino tem aumentado a procura por Museus de Ciências. A diversidade de informações encontradas nos espaços não-formais amplia as possibilidades de ensino e fortalece as relações com as escolas. O presente trabalho traz as concepções de professoras de Ciências sobre espaços não-formais de Educação e apresenta uma atividade chamada "Chá de Sentidos" com o tema Botânica, no Museu DICA, em Uberlândia - MG. As professoras apresentaram dificuldades em conceituar e distinguir o espaço formal do não-formal e vincularam o Museu DICA como um local complementar à escola. A atividade foi avaliada positivamente pelas professoras, mas, como uma forma de trabalhar o conteúdo curricular e não para simplesmente deflagrar o interesse pelos vegetais e ampliar as possibilidades de aprendizado de seus alunos, relacionando as experiências vivenciadas fora da escola com as da sala de aula.
PERCURSOS HISTÓRICOS DE ENSINAR CIÊNCIAS ATRAVÉS DE ATIVIDADES INVESTIGATIVAS
Authors: Andrade Guilherme Trópia Barreto de
Published: September 2015

Este trabalho discute momentos históricos em que a perspectiva do ensino por atividades investigativas foi debatida por estudiosos da Educação e da Educação em Ciências. Recorro aos trabalhos de John Dewey no início do século XX que propõem a investigação na escola a partir do método científico. Apresento as reformas curriculares em 19501960 no ensino de Ciências no Brasil em que materiais didáticos propunham a realização de investigações científicas. E por fim, discorro sobre a retomada da perspectiva investigativa no final do século XX com discussões sobre a natureza da Ciência e relações entre a Ciência e a sociedade no ensino de Ciências. Aponto que os fundamentos da perspectiva investigativa no ensino de Ciências estão intimamente relacionados às concepções de Ciência em discussão em cada momento histórico.
A memória, o historiador e o cidadão. A memória do Proceso argentino e os problemas da democracia
Authors: Romero Luis Alberto
Published: September 2015

O objetivo aqui é examinar a versão principal do passado recente argentino - a do Nunca más - e com isso mostrar que papel ela cumpriu na construção da nova democracia, republicana e liberal, sustentando-a e ao mesmo tempo condicionando-a. Quero, também, tratar a questão dos historiadores e sua complexa, para não dizer ambígua, relação com essa memória da ditadura e da democracia, e o papel por eles exercido na consagração ou contestação das memórias coletivas construídas.