bluuebunny/crossref_metadata_2025 huggingface dataset:
Conceptualizando prácticas de liderazgo de las TIC: Un estudio en la educación superior colombiana
Authors: Cifuentes Gary Alberto
Published: October 2016

Basado en un estudio empírico sobre el liderazgo para innovar con TIC en procesos educativos, este documento estudia ciertas prácticas de liderazgo que resultan relevantes en el contexto de las instituciones de educación superior. En este estudio se hace referencia a unidades de apoyo para la innovación con TIC, las cuales son designadas por muchas instituciones educativas para ejercer el liderazgo de la innovación educativa apoyada con tecnología, trascendiendo un rol de soporte tecnológico, y orientadas más hacia la transformación de las prácticas educativas con TIC. Como se demuestra en este escrito, al analizar las prácticas que llevan a cabo estas unidades se hace evidente su estrecha relación con la realización de las políticas educativas en educación superior. Como parte de los hallazgos se mencionan cuatro características en este tipo de unidades: su conocimiento centralizado y a la vez distribuido; su participación en la traducción de la política educativa; la sujeción a una lógica de demanda permanente del entorno; y un carácter político más allá de sus funciones administrativas. Este escrito demuestra que estas unidades, sin ser aún exploradas dentro de la literatura, resultan relevantes para estudiar las condiciones políticas y organizacionales que intervienen en una innovación educativa apoyada con tecnología.
Can non-cholesterol sterols and lipoprotein subclasses distribution predict different patterns of cholesterol metabolism and statin therapy response?
Authors: Gojkovic Tamara , Vladimirov Sandra , Spasojevic-Kalimanovska Vesna , Zeljkovic Aleksandra , Vekic Jelena , Kalimanovska-Ostric Dimitra , Djuricic Ivana , Sobajic Sladjana , Jelic-Ivanovic Zorana
Published: October 2016

Background:

Cholesterol homeostasis disorders may cause dyslipidemia, atherosclerosis progression and coronary artery disease (CAD) development. Evaluation of non-cholesterol sterols (NCSs) as synthesis and absorption markers, and lipoprotein particles quality may indicate the dyslipidemia early development. This study investigates associations of different cholesterol homeostasis patterns with low-density (LDL) and high-density lipoproteins (HDL) subclasses distribution in statin-treated and statin-untreated CAD patients, and potential use of aforementioned markers for CAD treatment optimization.

Methods:

The study included 78 CAD patients (47 statin-untreated and 31 statin-treated) and 31 controls (CG). NCSs concentrations were quantified using gas chromatography- flame ionization detection (GC-FID). Lipoprotein subclasses were separated by gradient gel electrophoresis.

Results:

In patients, cholesterol-synthesis markers were significantly higher comparing to CG. Cholesterol-synthesis markers were inversely associated with LDL size in all groups. For cholesterol homeostasis estimation, each group was divided to good and/or poor synthetizers and/or absorbers according to desmosterol and β-sitosterol median values. In CG, participants with reduced cholesterol absorption, the relative proportion of small, dense LDL was higher in those with increased cholesterol synthesis compared to those with reduced synthesis (p<0.01). LDL I fraction was significantly higher in poor synthetizers/poor absorbers subgroup compared to poor synthetizers/good absorbers (p<0.01), and good synthetizers/poor absorbers (p<0.01). Statin-treated patients with increased cholesterol absorption had increased proportion of LDL IVB (p<0.05).

Conclusions:

The results suggest the existence of different lipoprotein abnormalities according to various patterns of cholesterol homeostasis. Desmosterol/β-sitosterol ratio could be used for estimating individual propensity toward dyslipidemia development and direct the future treatment.
Synthesis and application of waterborne polyurethane fluorescent composite
Authors: Liu Ming , Chen Can , Li Wen-Xin , Zhu Xiao , Li Shuang , Zheng Chun-Ling
Published: October 2016

The waterborne polyurethane (WPU) was synthesized with isophorone diisocyanate (IPDI), polyethyleneglycol-400 (PEG-400), polyethyleneglycol-2000 (PEG-2000), dimethylolpropionic acid (DMPA) and trimethylolpropane (TMP) in this work. And the hydroxyethyl methacrylate (HEMA), butyl acrylate (BA) and methyl methacrylate (MMA) followed to modify the WPU by physical mixing and chemical integration to obtain the polyurethane/polyacrylate (PU/PA) and crosslinked polyurethane-acrylate (LPUA), respectively. Fourier transform infrared (FTIR) spectroscopy confirmed the presence of functional groups of LPUA. Thermogravimetric analysis (TGA) illustrated that the heat resistance of LPUA was better than that of PU/PA and WPU. And the effect of acrylate used to modify WPU on LPUA is also discussed. Lastly, LPUA was combined with Basic Red 1# to prepare fluorescent composite which could be used to dye cotton fabric. Such properties of fluorescent composite such as washing color fastness, heat-resistance were studied.
Investigation on the application properties of epoxy resin and glass fiber in RTV mold rubber
Authors: Siyuan Yang , Jincheng Wang , Junhua Wang
Published: October 2016

In this work, epoxy resin (EP), glass fiber (GF), and modified GF (MGF) were used in the modification of room-temperature-vulcanizated (RTV) silicone rubber, and their properties were investigated and characterized. The properties such as tensile strength, elongation at break, dimensional stability, and thermal stability were studied. Results revealed that RTV/EP-3/MGF-3 exhibited the best tensile properties. Meantime, the dimensional stability of these composites was improved in a certain degree. Thermogravimetric (TG) analysis, X-ray diffraction (XRD), scanning electron microscope (SEM), and differential scanning calometry (DSC) were also used in the investigation of the microtopography, structure and properties of these RTV mold rubbers.
The influence of bioactive additives on polylactide accelerated degradation
Authors: Morawska-Chochół Anna , Uszko Paulina , Szaraniec Barbara , Gryń Karol , Chłopek Jan
Published: October 2016

The aim of the research was to study the influence of the bioactive modifiers such as 7 wt.% of micrometric tricalcium phosphate (TCP) and 0.3 wt.% of nanometric hydroxyapatite (HAP) on the accelerated degradation process of composite resorbable implants based on poly(L-lactide) (PLA) matrix. The degradation was assessed on the basis of microstructural, structural and mechanical alterations. The measure of the PLA degradation progress was the gradual decrease in its molecular weight and mechanical strength. As the degradation proceeded, the plastic properties of materials decreased. In the case of composites such changes took place faster, which implies the accelerating influence of modifiers on the degradation process. Moreover, modifiers act as crystallization seeds, accelerating and stimulating the matrix organization and appearance of crystalline areas. The properties of the two composites differ. Adding TCP alone influenced the structural changes in the polymer more significantly than the addition of TCP/HAP, thus affecting the faster degradation.
Effects of hot water extraction (HWE) of Douglas fir as a pre-process for the sulfite pretreatment to overcome recalcitrance of lignocellulose (SPORL)
Authors: Zhu Rui , Yadama Vikram
Published: October 2016

The process named “sulfite pretreatment to overcome recalcitrance of lignocellulose” (SPORL) is designed for the digestion of softwoods within the framework of the biorefinery concept. “Hot water extraction (HWE)” is an environmentally benign and low-cost pretreatment, which only needs water as a reagent. In the present study, HWE has been investigated as a pre-process prior to SPORL with Douglas fir as feedstock. The SPORL parameters, namely, temperature and treatment time, were in the range 135–155°C and 40–120 min, respectively, while the sulfuric acid concentration was 0.2–0.4% (v/v). The aim was to maximize the enzymatic digestibility of the treated wood. The severity of SPORL at different pretreatment conditions was characterized by the combined severity factor (CSF). The HWE pre-process led to a two-fold increase in specific surface area of the substrate. More hemicellulosic-derived simple sugars were dissolved in the spent liquor (SL) as the CSF increased from 1.23 to 1.82. A maximum enzymatic digestibility of 64.3% was attained when SPORL was conducted at 155°C for 120 min with a sulfuric acid concentration of 0.4% (v/v). A considerably high enzymatic digestibility (~55–60%) is still achievable by incorporating HWE prior to SPORL, even if the SPORL severity is reduced, namely to a lower temperature (145°C), a shorter time (80 min), and a lower acid volume (0.3% v/v).
Effect of Heat Treatment Technique on the Low Temperature Impact Toughness of Steel EQ70 for Offshore Structure
Authors: Tao Su-Fen , Xia Yun-Jin , Wang Fu-Ming , Li Jie , Fan Ding-Dong
Published: October 2016

Circle quenching and tempering (CQ&T), intercritical quenching and tempering (IQ&T) and regular quenching and tempering (Q&T) were used to study the influence of heat treatment techniques on the low temperature impact toughness of steel EQ70 for offshore structure. The steels with 2.10 wt. % Ni (steel A) and 1.47 wt. % Ni (steel B) were chosen to analyze the effect of Ni content on the low temperature impact toughness of steel EQ70 for offshore structure. The fracture morphologies were examined by using a scanning electron microscope (SEM, JSM-6480LV), and microstructures etched by 4 vol. % nitric acid were observed on a type 9XB-PC optical microscope. The results show that the impact toughness of steel A is higher than that of steel B at the same test temperature and heat treatment technique. For steel B, the energy absorbed is, in descending order, CQ&T, Q&T and IQ&T, while for steel A, that is CQ&T, IQ&T and Q&T. The effects of heat treatment on the low temperature impact toughness are different for steels A and B, the absorbed energy changes more obviously for steel A. The results can be significant references for actual heat treatment techniques in steel plant.
Interarea Power System Oscillations Damping via AI-based Referential Integrity Variable-Structure Control
Authors: Ebrahim M. A. , Ramadan H. S.
Published: October 2016

The design of power system stabilizer (PSS) is load-dependent and needs continuous adjustment at each operating condition. This paper aims at introducing a robust non-fragile PSS for interconnected power systems. The proposed controller has the capability of adaptively tuning online its rule-base through a variable-structure direct adaptive control algorithm in order to rigorously attain the desired objectives. The PSS controller acts on damping the electromechanical modes of oscillations not only through a wide range of operating conditions but also in presence of different disturbances. Using MATLABTM-Simulink, simulation results significantly verify that the proposed controller provides favorable performance and efficiently contributes towards enhancing the system dynamic behavior when applied to the four machines two-area power system that mimics the typical system behavior in actual operation. The interaction between the variable-structure adaptive fuzzy-based power system stabilizer (VS-AFPSS) and the existed typical ones inside the interconnected power systems has been explicitly discussed. Compared to other conventional controllers, VS-AFPSS enables better damping characteristics to both local and inter-area oscillation modes considering different operating conditions and sever disturbances.
Rethinking image schemas: Containment and Emotion in Greek Poetry
Authors: Pagán Cánovas Cristóbal
Published: October 2016

Research on image schemas in language and cognition (containment, path, blockage, etc.) is largely based on de-contextualized linguistic expressions. This results in a view of image schemas as somehow detached from experience, constituting source domains for fixed conceptual projections from the concrete to the abstract. By showcasing creative examples of the poetics of containment throughout the long diachrony of Greek poetry, this article proposes that image schemas reflect the early attentional preferences of the human mind. These central features of image schemas are further selected for their suitability to create ad-hoc, non-perceptual meanings. Templates for conceptual integration involving image schemas also offer coherent patterns of variation, which opportunistically exploit arising connections with culture, context, and goals. Understanding the role of image schemas in meaning construction and verbal art requires the study of both the entrenched patterns and the know-how associated to their usage.
Textual properties and attentional windowing: A cognitive grammatical account of Gustav Hasford’s The Short-Timers
Authors: Esmaeili Parivash , Amjad Fazel Asadi
Published: October 2016

Deploying a cognitive grammar perspective, this paper reads Gustav Hasford’s war narrative, The Short-Timers, as displaying the way attentional windowing is reflected in the language. We have taken the methodological decision of becoming cognitively sensitized to the linguistic texture of traumatically loaded episodes, with the aim of looking at the specific linguistic choices that the producer of literary language has made, and the role played by such linguistic choices in cueing the reader’s attention toward these event frames. Specifically, we demonstrate that confluence of windowing and nesting of attention with theories of conceptual metaphor, schema, and force dynamics can yield a fuller cognitive grammatical account of the foregrounded event frames. It is observed that allocation of salience to such event frames is greatly dependent on phraseology that has a high density of metaphoric constructions.
Extended Reversible and Irreversible Thermodynamics: A Hamiltonian Approach with Application to Heat Waves
Authors: Lebon Georgy , Jou David , Grmela Miroslav
Published: October 2016

A new version of extended irreversible thermodynamics (EIT) satisfying a Hamiltonian structure is proposed. For pedagogical purpose, the simple problem of linear heat conduction in a rigid body is investigated to illustrate the general framework. In contrast with earlier versions of EIT wherein the heat flux was upgraded to the status of state variables, we select here its conjugate dual and higher order fluxes as new independent variables. Their time–evolution equations are formed of reversible and irreversible terms but they cannot take any arbitrary form. Restrictions are placed on the reversible terms by imposing a Hamiltonian structure while the irreversible contribution is subject to the requirement to satisfy the second law of thermodynamics. Explicit expressions of the temperature and heat flux waves are also derived.
A 10-year experience using combined lipid-lowering pharmacotherapy in children and adolescents
Authors: Araujo María Beatriz , Pacce María Sol
Published: October 2016

Background:

Current pediatric guidelines for heterozygous familial hypercholesterolemia (HeFH) propose pharmacotherapy (PT) with statins from age 8 to 10 years; however, schemes with absorption inhibitors combined with statins, could be started earlier. The aim of the study was to show the 10-year results of a combined treatment protocol.

Methods:

Prospective, descriptive and analytical study. Pediatric patients (n=70; mean age at PT initiation 9.3 years [range, 2–17.5]) with HeFH who required PT between 2005 and 2015 were included. All patients ≥10 years, with LDL >190 mg/dL or >160 mg/dL with one cardiovascular risk factor (CVRF) or >130 mg/dL with two or more CVRF; and those patients 5–10 years and with LDL-C >240 mg/dL or a family history of a cardiovascular event before 40 years, were medicated. After a period on a lipid-lowering diet (LLD), all patients were started on ezetimibe. Patients who did not achieve the treatment goal were given statins. The variables were: age, age at PT initiation, duration of PT, initial LDL-C, mean LDL-C during ezetimibe monodrug therapy, mean LDL-C during combined PT, and percentage of LDL decrease.

Results:

LDL-C levels were: Baseline: 235 mg/dL±55; after 3 months on ezetimibe: 167 mg/dL±47 (decrease: −27.62%). In 18 patients who did not reach the treatment goal atorvastatin was added and their LDL-C decreased −41.5% (p: 0.02). Overall, mean final LDL-C was 155 mg/dL±30.4 (range, 98–257) and treatment goals were reached in 74% of the patients. No severe side effects were reported.

Conclusions:

Combined and sequential treatment starting at early ages was shown to be safe and effective over this follow-up period.
Crystal structure of 1-(benzo[d]thiazol-2-yl)-3-phenylthiourea, C14H11N3S2
Authors: Jambi Suhair M. S. , Al-Obaid Abdul-Rahman M. , Hosten Eric C. , Betz Richard , Bari Ahmed
Published: October 2016

C14H11N3S2, triclinic, P1̅ (no. 2), a = 5.7607(5)Å, b = 9.8397(9) Å, c = 12.0920(11) Å, α = 72.899(4)°, β = 81.833(4)°, γ = 86.796(5)°, V = 648.40(10) Å3, Z = 2, R
gt(F) = 0.0295, wR
ref(F
2) = 0.0797, T = 200(2) K.
Crystal structure of di-μ-chlorido-bis[1,2-bis(dicyclohexylphosphino)-1,2-dicarba-closo-dodecaborane-κ2P,P′]zinc(II), C52H108B20Cl2P4Zn2
Authors: Xin Wang , Liguo Yang , Qianqian Gao , Yuqiang Dai
Published: October 2016

C52H108B20Cl2P4Zn2, monoclinic, C2/c (no. 15), a = 31.783(3) Å, b = 10.0780(10) Å, c = 24.9326(19) Å, β = 109.901(2)°, V = 7509.2(11) Å3, Z = 4, R
gt(F) = 0.0569, wR
ref(F
2) = 0.0972, T = 298 K.
Non-classical effects in proton or hydrogen transfer
Authors: Waluk Jacek
Published: October 2016

Results of thorough investigations of tautomerism in the ground and excited electronic states performed for various organic molecules under different regimes: condensed phases, isolated and single molecules, with a special emphasis on porphycene, a porphyrin isomer, demonstrate that, in order to precisely describe the proton/hydrogen transfer path, one has to explicitly consider tunneling. Tautomerization is a multidimensional process, controlled by excitation of specific vibrational modes. Vibrational excitation can both enhance or hinder the reaction. The role of specific vibrational modes can now be assessed, even at the level of single molecules.
Association between MTHFR C677T polymorphism and folate, vitamin B12, homocysteine, and DNA fragmentation in patients with ovarian cancer
Authors: Özkılıç Anıl Çağla , Çetin Ahmet , Bayoğlu Burcu , Balcı Huriye , Cengiz Müjgan
Published: October 2016

Objective

Methylenetetrahydrofolate reductase (MTHFR) is an important enzyme that regulates the metabolism of methionine and folate. MTHFR C677T polymorphism was reported to be associated with breast and ovarian cancer. The aim of this study was to evaluate the association between the MTHFR C677T (rs1801133) polymorphism and homocysteine, vitamin B12, and folate levels, and DNA fragmentation in patients with ovarian cancer and healthy controls.

Materials and methods

This case-control study was conducted in Istanbul University Cerrahpasa Medical Faculty. We studied 50 ovarian cancer patients and 54 healthy controls. The MTHFR C677T polymorphism was determined by PCR followed by restriction fragment length polymorphism (RFLP) and agarose gel electrophoresis. DNA fragmentation was assessed by the comet assay. Homocysteine levels were measured by ELISA, whereas vitamin B12 and folate levels were measured by chemiluminescence methods.

Results

We found no correlation between the MTHFR C677T polymorphism and ovarian cancer. No significant difference was found in homocysteine, folate, and vitamin B12 levels between patient and control groups. Increased DNA fragmentation was detected in patients with ovarian cancer.

Conclusion

Our findings suggest that MTHFR C677T polymorphism, as well as homocysteine, folic acid, and vitamin B12 levels, are not associated with an increased risk for ovarian cancer.
Highly Accurate Compact Difference Scheme for SPL Heat Conduction Model of General Body
Authors: Mishra T.N. , Rai K.N.
Published: October 2016

Heat transport based on SPL model is of vital importance in microtechnological applications. The heat transport equation is different from the traditional heat conduction equation due to the presence of lagging parameter. In this article, the heat transport in the general body based on SPL heat conduction model under Neumann (insulated) boundary condition is solved by high-order compact difference scheme. The solution is obtained by extending the idea of Dai for discretising Neumann (insulated) boundary condition of heat conduction to the SPL heat conduction model and avoid the need of discretising Neumann boundary conditions. The stability of the numerical scheme has been discussed and observed that the present scheme is unconditionally stable. Model is validated for the thin film of silicon and found that SPL model give the satisfactory results in the macro- and microtemporal scales and up to microspatial scale. A numerical example of particular interest has been studied and discussed in details.
E2F1-mediated human POMC expression in ectopic Cushing’s syndrome
Authors: Araki Takako , Liu Ning-Ai , Tone Yukiko , Cuevas-Ramos Daniel , Heltsley Roy , Tone Masahide , Melmed Shlomo
Published: October 2016

Cushing’s syndrome is caused by excessive adrenocorticotropic hormone (ACTH) secretion derived from pituitary corticotroph tumors (Cushing disease) or from non-pituitary tumors (ectopic Cushing’s syndrome). Hypercortisolemic features of ectopic Cushing’s syndrome are severe, and no definitive treatment for paraneoplastic ACTH excess is available. We aimed to identify subcellular therapeutic targets by elucidating transcriptional regulation of the human ACTH precursor POMC (proopiomelanocortin) and ACTH production in non-pituitary tumor cells and in cell lines derived from patients with ectopic Cushing’s syndrome. We show that ectopic hPOMC transcription proceeds independently of pituitary-specific Tpit/Pitx1 and demonstrate a novel E2F1-mediated transcriptional mechanism regulating hPOMC. We identify an E2F1 cluster binding to the proximal hPOMC promoter region (−42 to +68), with DNA-binding activity determined by the phosphorylation at Ser-337. hPOMC mRNA expression in cancer cells was upregulated (up to 40-fold) by the co-expression of E2F1 and its heterodimer partner DP1. Direct and indirect inhibitors of E2F1 activity suppressed hPOMC gene expression and ACTH by modifying E2F1 DNA-binding activity in ectopic Cushing’s cell lines and primary tumor cells, and also suppressed paraneoplastic ACTH and cortisol levels in xenografted mice. E2F1-mediated hPOMC transcription is a potential target for suppressing ACTH production in ectopic Cushing’s syndrome.
A stroke-ellátás hazai eredményei a nemzetközi adatok tükrében
Authors: Szőcs Ildikó , Bereczki Dániel , Belicza Éva
Published: October 2016

Introduction: The EuroHOPE FP7 project analysed the effectiveness and efficiency of stroke care between 2010 and 2014. Aim: The study introduces Hungarian data in comparison with international results and explores the causes of differences. Method: The analysis was performed on data available from regular data collection in Finland, The Netherlands, Hungary, Italy, Scotland, and Sweden, with standardized indicators. Hungarian data was analysed between 2005 and 2009, and the international benchmarking in 2008, with multivariate logistic regression analysis for risk adjustment. Results: Stroke incidence in Hungary was the double of the Italian or Finnish results (43.3/10,000 inhabitants), while comorbidities did not differ among countries. In Hungary, 19.9% of patients purchased anti-coagulants, one-third of the rate in Finland. One-year mortality in Hungary was 30%, the worst among the countries. Possible causes are inadequate prevention, more severe status of patients, and deficiencies of hospital care and rehabilitation. Conclusion: Causal analysis of these results and corrective measurements are recommended. Orv. Hetil., 2016, 157(41), 1635–1641.
A csípőtáji törések hazai ellátásának elemzése a 2004–2009 közötti időszakban
Authors: Flóris István , Belicza Éva
Published: October 2016

Introduction: Proximal femoral fractures with severe outcome are most common in the increasing group of elderly patients. Aim: Based on the regular data gathered by the EuroHOPE research, the most important aspects and results of the treatment of proximal femoral fractures were studied. Method: Data of hospital admissions due to proximal femoral fractures were analyzed. Results: There was a slight increase in the number of hospitalized patients between 2004 and 2009 in Hungary. 88% of the patients received operative treatment, 41% suffered femoral neck fractures. Mortality rates did not change significantly in the analyzed period. Standardized annual mortality rates for patients who had suffered a femoral neck fracture were 28% when prosthesis was implanted; this result was somewhat more favorable than in case of other surgical procedures. Annual mortality rates were higher in the peritrochanteric fracture group where intramedullary nailing was performed (36%). The ratio of operated patients did not differ significantly from international results. Mortality rates in Hungary were significantly less favorable. 30 day standardized mortality rate was 13.6% in 2008, twice as high as the rate in Finland, The Netherlands, Norway, Scotland and Sweden. The 40% mortality rate calculated for 365 days was significantly higher than international results. Conclusion: To define the measures needed to improve results, systematic analysis of both in-hospital treatment protocols, and follow-up treatment is necessary. Orv. Hetil., 2016, 157(41), 1642–1648.
Range extension and distribution of the invasive Moreau’s Tropical House Gecko, Hemidactylus mabouia (Moreau de Jonnès, 1818) (Squamata: Gekkonidae), in Suriname
Authors: Jairam Rawien , D'Orgeix Christian A. , D'Orgeix Christian H. , Harris Akira
Published: October 2016

We document a population of Moreau’s Tropical House Gecko, Hemidactylus mabouia (Moreau de Jonnès, 1818), at a remote Amerindian village, Kwamalasamutu, Suriname, South America. This village is approximately 370 km southwest of the northern coastal region where the presence of H. mabouia was previously recorded. Numerous individuals and a gravid female provide evidence of a viable population. The morphological characters of the two female specimens examined fall within the range of characters recorded from African and Ascension Island specimens. Due to its overland inaccessibility, we believe that colonization occurred anthropogenically through air or boat transport from the coastal region.
Sandy beaches: state of the art of nematode ecology
Authors: MARIA TATIANA F. , VANAVERBEKE JAN , VANREUSEL ANN , ESTEVES ANDRÉ M.
Published: October 2016

ABSTRACT In this review, we summarize existing knowledge of the ecology of sandy-beach nematodes, in relation to spatial distribution, food webs, pollution and climate change. We attempt to discuss spatial scale patterns (macro-, meso- and microscale) according to their degree of importance in structuring sandy-beach nematode assemblages. This review will provide a substantial background on current knowledge of sandy-beach nematodes, and can be used as a starting point to delineate further investigations in this field. Over decades, sandy beaches have been the scene of studies focusing on community and population ecology, both related to morphodynamic models. The combination of physical factors (e.g. grain size, tidal exposure) and biological interactions (e.g. trophic relationships) is responsible for the spatial distribution of nematodes. In other words, the physical factors are more important in structuring nematodes communities over large scale of distribution while biological interactions are largely important in finer-scale distributions. It has been accepted that biological interactions are assumed to be of minor importance because physical factors overshadow the biological interactions in sandy beach sediments; however, the most recent results from in-situ and ex-situ experimental investigations on behavior and biological factors on a microscale have shown promise for understanding the mechanisms underlying larger-scale patterns and processes. Besides nematodes are very promising organisms used to understand the effects of pollution and climate changes although these subjects are less studied in sandy beaches than distribution patterns.
Ecological impacts of non-native tree species plantations are broad and heterogeneous: a review of Brazilian research
Authors: VALDUGA MARCOS O. , ZENNI RAFAEL D. , VITULE JEAN R.S.
Published: October 2016

RESUMO Plantações de árvores não nativas representam 7% das florestas do mundo e 1,24% da vegetação brasileira. Essas áreas plantadas devem aumentar no futuro próximo; assim, é importante sistematizar o conhecimento existente sobre os efeitos ecológicos das plantações para auxiliar o manejo florestal e a conservação da biodiversidade. Aqui, realizamos uma revisão sistemática da literatura ecológica associada com espécies plantadas de Pinus e de Eucalyptus no Brasil. Nós comparamos as métricas de publicação com: a distribuição geográfica das espécies, os tipos de ecossistemas, os biomas, os taxa, e os impactos ecológicos. Encontramos 152 publicações entre 1992 e 2012. O número de publicações está positivamente correlacionada com a área plantada, número de plantações com certificação florestal, número de investigadores existente, e riqueza de reinos estudados. A maioria dos estudos foram em ecossistemas terrestres (92,1%), no bioma Mata Atlântica (55,3%), e no reino Animalia (68,2%). A maioria dos impactos das plantações de árvores não nativas foram negativas (55,9%), seguido pelo positivo (27%) e mista (17,1%). Impactos negativos foram declínios na riqueza e abundância de espécies, diversidade no banco de sementes e regeneração natural. Impactos positivos foram o aumento ou manutenção da diversidade banco de sementes e regeneração natural. Impactos mistos foram os aumentos na abundância de pragas de plantação de árvores nativas. Tomados em conjunto, nossos resultados sugerem que o manejo florestal pode ajudar a manter a biodiversidade se considerar as condições ambientais anteriores e integrar plantações com habitats nativos adjacentes.
Inhibition of proteases and phospholipases A2 from Bothrops atrox and Crotalus durissus terrificus snake venoms by ascorbic acid, vitamin E, and B-complex vitamins
Authors: OLIVEIRA CARLOS H.M. , SIMÃO ANDERSON A. , TRENTO MARCUS V.C. , CÉSAR PEDRO H.S. , MARCUSSI SILVANA
Published: October 2016

ABSTRACT The enzyme inhibition by natural and/ or low-cost compounds may represent a valuable adjunct to traditional serotherapy performed in cases of snakebite, mainly with a view to mitigate the local effects of envenoming. The objective of this study was to evaluate possible interactions between vitamins and enzymes that comprise Bothrops atrox and Crotalus durissus terrificus venoms, in vitro. Proteolysis inhibition assays (substrates: azocasein, collagen, gelatin and fibrinogen), hemolysis, coagulation, hemagglutination were carried out using different proportions of vitamins in face of to inhibit minimum effective dose of each venom. The vitamins were responsible for reducing 100% of breaking azocasein by C.d.t. venom, thrombolysis induced by B. atrox and fibrinogenolysis induced by both venoms. It is suggested the presence of interactions between vitamin and the active site of enzymes, for example the interactions between hydrophobic regions present in the enzymes and vitamin E, as well as the inhibitions exercised by antioxidant mechanism.
A LÓGICA DA FICÇÃO NO "TRATADO" DE HUME
Authors: Almeida Pedro Jonas de
Published: October 2016

RESUMO No Livro I, parte IV, do "Tratado da natureza humana", Hume desenvolve aquilo que vamos chamar de lógica da ficção. Não se trata de um simples erro da imaginação enquanto fantasia, mas de uma propensão a criar ideias, entidades e objetos a partir das percepções presentes na mente. O que resulta daí é um sentido rico e novo de ficção que permite a Hume desenvolver uma história natural da filosofia, descrevendo a gênese inevitável de conceitos metafísicos. Partindo de uma inspiração kantiana, iremos abordar esse tema ressaltando as semelhanças e diferenças entre as ficções naturais e a ilusão transcendental.
SUPREMATISMO Y REVOLUCIÓN. ARTE MODERNO Y POLÍTICA CONTEMPORÁNEA
Authors: Gutiérrez Juan José Gómez
Published: October 2016

RESUMEN Este artículo examina la estética suprematista en relación con teorías políticas contemporáneas sobre la revolución y la transformación social. El punto de partida del suprematismo es la destrucción de la realidad objetiva como acto liberador. Aunque diversos autores contemporáneos del campo de la teoría política conciben el arte tcomo producción de sentimientos que actúan como puntos de partida de la acción y el compromiso. Ambas perspectivas se entrelazan en el concepto de 'revolución': la liberación de la representación totalitaria y la creación de una nueva sociedad.
O NASCIMENTO DO INQUÉRITO NA TRAGÉDIA DE "ÉDIPO-REI": UMA LEITURA FOUCAULTIANA
Authors: Incerti Fabiano
Published: October 2016

RESUMO Michel Foucault considera a tragédia de "Édipo-Rei" como uma história de saber-poder da qual emerge, no nascente direito grego, a prática do inquérito (enquête). Para ele, a trama discorre acerca da repressão que pesa sobre os sistemas ocidentais de verdade. Se de alguma maneira há uma determinação edipiana no Ocidente, esta não está no nível do desejo, como acredita a psicanálise, mas se encontra no interior do sistema de coações que sustenta, desde a Grécia, o discurso sobre a verdade e que se expressa a partir da exigência política, jurídica e religiosa de converter o acontecimento num fato conservado definitivamente por meio da comprovação das testemunhas. Édipo é, em síntese, uma história da verdade, em que há um crime que precisa ser desvendado e um criminoso a ser punido, e cada uma das partes da investigação atende rigorosamente às leis da época.
Fatores sociodemográficos e ocupacionais associados aos ganhos e perdas percebidos por trabalhadores de uma universidade pública frente à proximidade da aposentadoria
Authors: Pissinati Paloma de Souza Cavalcante , Haddad Maria do Carmo Fernandez Lourenço , Dalmas José Carlos , Birolim Marcela Maria
Published: October 2016

Resumo: Objetivou-se analisar os fatores sociodemográficos e ocupacionais associados aos ganhos e às perdas percebidos por trabalhadores de uma universidade pública frente à proximidade da aposentadoria. Pesquisa exploratória, transversal e quantitativa, realizada em uma universidade pública do norte do Estado do Paraná, Brasil, com 164 trabalhadores pré-aposentados, que responderam às escalas de importância de ganhos e de perdas da aposentadoria. Os dados foram analisados por regressão linear simples e múltipla a partir das dimensões das escalas, e foram usadas, como preditores, as variáveis sociodemográficas e ocupacionais. Os trabalhadores atribuíram maior importância aos ganhos do que às perdas da aposentadoria. O aumento da idade associou-se à menor valorização dos ganhos totais e do tempo para relacionamentos. O maior tempo de atuação contribuiu para a valorização das perdas totais e dos aspectos tangíveis do trabalho. Faz-se necessário criar espaços de reflexão nas instituições de trabalho que proporcionem a escuta das necessidades dos trabalhadores, sobretudo, daqueles com maior idade e tempo de serviço.
Cuestionario básico y criterios metodológicos para las Encuestas sobre Condiciones de Trabajo, Empleo y Salud en América Latina y el Caribe
Authors: Benavides Fernando G. , Merino-Salazar Pamela , Cornelio Cecilia , Assunção Ada Avila , Agudelo-Suárez Andrés A. , Amable Marcelo , Artazcoz Lucía , Astete Jonh , Barraza Douglas , Berhó Fabián , Milián Lino Carmenate , Delclòs George , Funcasta Lorena , Gerke Johanna , Gimeno David , Itatí-Iñiguez María José , Lima Eduardo de Paula , Martínez-Iñigo David , Medeiros Adriane Mesquita de , Orta Lida , Pinilla Javier , Rodrigo Fernando , Rojas Marianela , Sabastizagal Iselle , Vallebuona Clelia , Vermeylen Greet , Villalobos Gloria H. , Vives Alejandra
Published: October 2016

Resumen: El objetivo de este trabajo es presentar un cuestionario básico y criterios metodológicos mínimos, para ser considerados en futuras Encuestas sobre Condiciones de Trabajo, Empleo y Salud (ECTES) en América Latina y el Caribe. Para ello, se llevó a cabo un proceso de consenso, tanto virtual como presencial, con la participación de un grupo internacional de expertos que, para definir la propuesta, partieron de las encuestas disponibles en la región hasta 2013. El cuestionario final incluyó 77 preguntas agrupadas en seis dimensiones: características sociodemográficas del trabajador y la empresa; condiciones de empleo; condiciones de trabajo; estado de salud; recursos y actividades preventivas; y características familiares. Entre los criterios metodológicos mínimos destacan el domicilio de la persona entrevistada como lugar de la entrevista y los relacionados con la calidad del trabajo de campo. Estos resultados pueden ayudar a mejorar la comparabilidad de las futuras ECTES en América Latina y el Caribe, lo que contribuiría a mejorar la información en salud laboral en la región.
A EPIDEMIA DE ZIKA E OS LIMITES DA SAÚDE GLOBAL
Authors: Nunes João , Pimenta Denise Nacif
Published: October 2016

Resumo O vírus Zika foi isolado pela primeira vez em 1947 em Uganda. Se a doença existe desde então, por que somente agora há atenção da mídia, da ciência, das agências financiadoras e dos órgãos nacionais e internacionais? A partir de uma visão crítica da saúde global, que considera os contextos sociais, políticos e ideológicos, nos quais a Zika é enquadrada, almeja-se analisar a atual epidemia de Zika em quatro eixos: (1) investigação dos processos sociais, culturais e políticos; (2) análise das práticas de significação; (3) estudo das zonas negligenciadas/silenciadas; e (4) atenção à diversidade de experiências individuais de saúde e de doença. As tensões políticas aqui identificadas e discutidas - referentes ao controle das doenças negligenciadas, determinantes sociais, de classe e de gênero - enquadram-se em dinâmicas que ultrapassam as fronteiras nacionais. Nesse sentido, os processos de significação e as respostas dadas à epidemia mostram os atuais limites da saúde global.
A REDE DE POLÍTICAS DE SAÚDE PÚBLICA E A COOPERAÇÃO SUL-SUL: OS CASOS DE MOÇAMBIQUE E ANGOLA
Authors: Esteves Paulo , Gomes Geovana Zoccal , Fonseca João Moura
Published: October 2016

Resumo Análises da cooperação brasileira para o desenvolvimento frequentemente tomam o Ministério das Relações Exteriores e a Agência Brasileira de Cooperação como ponto de partida institucional. Contudo, pesquisas de campo realizadas pelos autores no Brasil, Angola e Moçambique sugerem ser necessário conferir maior ênfase analítica ao papel das chamadas agências executoras e das redes de políticas de que fazem parte. Com foco no setor da saúde, este artigo parte da Rede de Políticas de Saúde Pública para então analisar as ações de cooperação brasileira em Moçambique e Angola. Baseado nos processos de constituição e consolidação dessa rede, o argumento avança no sentido de que o engajamento dos agentes da rede em projetos de cooperação Sul-Sul deve ser compreendido de forma mais ampla, paralela à da extensão internacional da própria rede, elemento que pode ser verificado no portfólio de projetos brasileiros na área da saúde nos dois países africanos. Conclusões alcançadas com essa abordagem sinalizam, do ponto de vista da formulação de políticas, a necessidade de consolidação do que os cooperantes brasileiros do campo da saúde denominam cooperação estruturante. O texto defende, ainda, maior investimento em trabalhos de campo como meio para melhor compreender a articulação entre cooperantes brasileiros e seus parceiros na África lusófona.
INTERFACES ENTRE O REGIME INTERNACIONAL DE MUDANÇA CLIMÁTICA E A SAÚDE GLOBAL
Authors: Rached Danielle Hanna
Published: October 2016

Resumo Apesar de saúde global e mudança climática serem fenômenos complexos e imbricados, eles ainda pertencem a mundos diversos. Com o objetivo de identificar interfaces entre os dois campos, o presente artigo analisa a evolução do Regime Internacional de Mudança Climática: suas características, obstáculos e principais decisões.
Efeito da Diluição Sobre a Microestrutura da Liga AWS ER NiCrMo-14 na Soldagem de Revestimentos pelo Processo TIG com Alimentação de Arame Frio
Authors: Miná Émerson Mendonça , Silva Yuri Cruz da , Dille Jean , Silva Cleiton Carvalho
Published: October 2016

Resumo: A diluição é um evento de forte influência na microestrutura e, consequentemente, nas propriedades de revestimentos soldados. O presente estudo avaliou o efeito do nível de diluição na microestrutura da zona fundida de revestimentos da liga Inconel 686. Os revestimentos foram depositados por processo TIG com alimentação de arame frio. A diluição foi calculada a partir das características geométricas dos revestimentos e por medidas de composição química de EDS e de espectroscopia de emissão ótica. As microestruturas de todos os revestimentos foram compostas por uma matriz γ-CFC com alguns precipitados secundários. Essas partículas são chamadas de fases topologicamente compactas. Esses precipitados assumiram diversos aspectos morfológicos, nos quais os precipitados com morfologia disforme foram observados com maior frequência em todos os revestimentos avaliados, independentemente do nível de diluição. Uma fase com morfologia lamelar, que estabelece uma relação de orientação com a matriz γ-CFC na direção de solidificação, foi observada nos revestimentos de menor diluição. Além disso, uma fase com morfologia disforme com uma fina precipitação agregada foi observada nos revestimentos mais diluídos.
Efeitos da Pulsação Ultrassônica da Corrente sobre a Geometria da ZF e ZAC na Soldagem Arco Submerso
Authors: Voigt Anna Louise , Cunha Tiago Vieira da
Published: October 2016

Resumo: O presente trabalho propõe investigar a aplicação da técnica de excitação ultrassônica do arco no processo SAW com o intuito de avaliar a influência dos principais parâmetros associados a pulsação da corrente, como a frequência e a amplitude da corrente de excitação ultrassônica, sobre os cordões de solda produzidos. Para tanto, foi montada uma bancada experimental constituída por duas fontes de energia: uma convencional de soldagem e outra capaz de pulsar a corrente em frequências ultrassônicas. Durante a realização dos ensaios foram empregadas duas amplitudes de corrente de excitação ultrassônica, 25 A e 50 A, cada qual em três frequências de pulsação diferentes, 20 kHz, 50 kHz e 80 kHz. A partir de macrografias foram realizadas análises dimensionais dos cordões obtidos com foco na largura, penetração e área fundida, assim como a área da zona afetada pelo calor (ZAC). Como resultado, contrariando as informações disponíveis na literatura, não foi possível identificar alterações consideráveis na geometria do cordão de solda, assim como, na ZAC que pudessem ser atribuídas à pulsação da corrente nas frequências estudadas.
Uma introdução aos métodos mistos
Authors: Paranhos Ranulfo , Figueiredo Filho Dalson Britto , Rocha Enivaldo Carvalho da , Silva Júnior José Alexandre da , Freitas Diego
Published: October 2016

Resumo Quais são as vantagens da triangulação metodológica? Apesar de ser consensual a importância da combinação de técnicas quantitativas e qualitativas, ainda são raros os trabalhos que efetivamente utilizam uma abordagem multimétodo. Este artigo apresenta uma introdução aos métodos mistos. Nosso público alvo são estudantes de graduação e pós-graduação em estágios iniciais de treinamento. Metodologicamente, sintetizamos as principais recomendações da literatura e utilizamos dois exemplos para ilustrar como a combinação de técnicas pode ser empregada em desenhos de pesquisa empíricos. Com este artigo, esperamos difundir a utilização de métodos mistos nas Ciências Sociais brasileiras1.
Más allá del recinto legislativo - estrategias colectivas para una agenda de género en América Latina y el Caribe
Authors: Gustá Ana Laura Rodríguez , Madera Nancy
Published: October 2016

Resumen Bajo la concepción 'densa' de la representación sustantiva de mujeres y un enfoque relacional de las organizaciones, este artículo examina cómo las legisladoras articulan estrategias colectivas para debatir asuntos de género. Se analizan dos estrategias de acción colectiva: la creación de institucionalidad legislativa de género nacional y la conformación de redes supranacionales, mediante el uso una base de datos original sobre la institucionalidad legislativa de 18 países de la región y los contenidos de debates de encuentros parlamentarios regionales entre 2007 y 2013. Una perspectiva sociológica de la representación sustantiva, aplicada a América Latina y el Caribe, muestra que las legisladoras realizan un profuso trabajo de vinculación con diversos actores nacionales y globales y, al construir lazos con el Sistema de las Naciones Unidas, introducen un lenguaje de derechos humanos de mujeres en la agenda. Además, se identificó un conjunto elevado de encuentros regionales en materia de género, propiciados por legisladoras, que sugieren una red temática cuyos resultados tienen un valor simbólico y, en ocasiones, normativo. Por ende, la agenda legislativa de género no debe analizarse únicamente a partir de dinámicas endógenas del Parlamento.
Stages of change of behavior in women on a multi-professional program for treatment of obesity
Authors: Bevilaqua Cheila Aparecida , Pelloso Sandra Marisa , Marcon Sonia Silva
Published: October 2016

ABSTRACT Objective: to ascertain the effectiveness of an intervention program in relation to anthropometric measurements and stage of readiness for behavioral change in women with excess weight. Methods: the intervention group (IG) was made up of 13 women, and the control group (CG), by 20. The intervention lasted 16 weeks, and included the practice of guided physical activity three times a week, and health education once a week. The application of the questionnaire on stage of readiness for behavioral change, and the anthropometric evaluations, were undertaken at two points - before and after the period of intervention. The statistical analysis involved tests of comparison and association. Results: in general, at the first point, the participants in the two groups were predisposed to make changes in what they ate and in their physical activity. However, significant difference was only observed in relation to weight, body mass index (BMI), waist circumference and waist-hip ratio and readiness for change among the members of the intervention group. Conclusion: the intervention programmed was effective in weight loss, reduction of waist circumference and waist-hip ratio, and in changing behaviors related to the practicing of physical exercise and eating habits.
Sobre a conexão entre alguns modelos físicos não-lineares
Authors: Andrade D. X. , Anjos P. H. R. , Assis P. E. G.
Published: October 2016

Neste trabalho revisamos alguns dos sistemas não-lineares mais paradigmáticos e desvendamos algumas das suas surpreendentes interligações. Os problemas de interesse, descrito matematicamente pelas equações de sine-Gordon, Toda e KdV, generalizam modelos físicos conhecidos, como o pêndulo simples, o sistema massa-mola e as ondas lineares em água, respectivamente. Depois de discutirmos as peculiaridades decorrentes da presença de não-linearidades nos modelos, esclarecemos como os sistemas apresentados são relacionados uns aos outros, indicando a existência de uma família de equações que compartilham propriedades como a integrabilidade. Nós mostramos como a equação de KdV pode ser convenientemente discretizada a fim de preservar tais características importantes. Além de apresentarmos as ligações estreitas que esta equação tem com a cadeia de Toda e com a equação sine-Gordon, nós também investigamos outros procedimentos capazes de gerar um sistema integrável discreto a partir do modelo KdV com a discretização de Hirota.