bluuebunny/crossref_metadata_2025 huggingface dataset:
Wavelet analysis of low-frequency variability in oak tree-ring chronologies from east Central Europe
Authors: Sen Asok K. , Kern Zoltán
Published: July 2016

This study investigates the low-frequency (interannual and longer period) variability in three hydroclimatic records from east Central Europe. Two of these records consist of climate proxies derived from oak-tree rings in Bakta forest, and Balaton Highlands in Hungary, for the time interval 1783-2003. The third record consists of homogenized instrumental precipitation data from Budapest, Hungary, from 1842 to 2003. Using wavelet analysis, the three time series are analyzed and compared with one another. It is found that all three time series exhibit strong interannual variability at the 2-4 years timescales, and these variations occur intermittently throughout the length of each record. Significant variability is also observed in all the records at decadal timescales, but these variations persist for only two to three cycles. Wavelet coherence among the various time series is used to explore their time-varying correlation. The results reveal significant coherence at the 2-4 years band. At these timescales, the climatic variations are correlated to the tree-ring signal over different time intervals with changing phase. Increased (decreased) contribution of large-scale stratiform precipitation offers a potential explanation for enhanced (faded) coherence at the interannual timescale. Strong coherence was also observed occasionally at decadal timescales, however these coherences did not appear uniformly. These results reinforce the earlier assertion that neither the strength nor the rank of the similarity of the local hydroclimate signals is stable throughout the past two centuries.
ANFIS-Based Resource Mapping for Query Processing in Wireless Multimedia Sensor Networks
Authors: Shivappa Nagesha , Manvi Sunilkumar S.
Published: July 2016

Wireless multimedia sensor networks (WMSNs) are usually resource constrained, and where the sensor nodes have limited bandwidth, energy, processing power, and memory. Hence, resource mapping is required in a WMSN, which is based on user linguistic quality of service (QoS) requirements and available resources to offer better communication services. This paper proposes an adaptive neuro fuzzy inference system (ANFIS)-based resource mapping for video communications in WMSNs. Each sensor node is equipped with ANFIS, which employs three inputs (user QoS request, available node energy, and available node bandwidth) to predict the quality of the video output in terms of varying number of frames/second with either fixed or varying resolution. The sensor nodes periodically measure the available node energy and also the bandwidth. The spatial query processing in the proposed resource mapping works as follows. (i) The sink node receives the user query for some event. (ii) The sink node sends the query through an intermediate sensor node(s) and cluster head(s) in the path to an event node. A cluster head-based tree routing algorithm is used for routing. (iii) The query passes through ANFIS of intermediate sensor nodes and cluster heads, where each node predicts the quality of the video output. (iv) The event node chooses the minimum quality among all cluster heads and intermediate nodes in the path and transmits the video output. The work is simulated in different network scenarios to test the performance in terms of predicted frames/second and frame format. To the best of our knowledge, the proposed resource mapping is the first work in the area of sensor networks. The trained ANFIS predicts the output video quality in terms of number of frames/second (or H.264 video format) accurately for the given input.
Design and Analysis of Stimulated Raman Scattering-Aware Algorithm in RWA
Authors: Sim Wai S. , Tan Saw C. , Yusoff Zulfadzli
Published: July 2016

A stimulated Raman scattering (SRS)-aware routing and wavelength assignment (RWA) scheme, called assign minimum interference and shortest algorithm, is proposed to minimize the effect of SRS in network. The design parameter, the number of interference of routes in the proposed algorithm is investigated to analyze its capabilities of influence the network performance. The various setting of the parameter is tested in 15-nodes Mesh and 14-nodes National Science Foundation networks for analysis in order to provide useful guidelines for designing effective SRS-aware RWA scheme. The ultimate objective is to define the necessary and sufficient rules that must be followed in the proposed algorithm by identifying the necessary RWA parameters in order to minimize the effect of SRS in optical networks. The result shows that the smaller the number of interference of routes, the lower the blocking probability in the mentioned topologies.
Prevalence of idiopathic intracranial hypertension and associated factors in obese children and adolescents
Authors: Tepe Derya , Demirel Fatma , Seker Esra Dag , Arhan Ebru Petek , Tayfun Meltem , Esen Ihsan , Kara Ozlem , Kizilgun Murat
Published: July 2016

Background:

Idiopathic intracranial hypertension (IIH) is one of the most important and rare complications of obesity. Prevalence of IIH in childhood obesity is not known. The purpose of this study was to determine the prevalence of IIH in obese children and adolescents and to investigate the relevant factors.

Methods:

In this study, 1058 obese children and adolescents between 2 and 18 years of age were included. Funduscopic examination was conducted for all subjects. In cases with papilledema, increase in intracranial pressure was clarified by measuring CSF pressure with a lumbar puncture. Other causes of IIH were ruled out with clinical, laboratory tests and imaging techniques.

Results:

Idiopathic intracranial hypertension was diagnosed in 14 subjects (1.32%). Rates of headache and systemic hypertension in subjects with IIH was determined to be 78.6% and 28.6%, respectively. Morning cortisol, fasting insulin and HOMA-IR values were found to be significantly higher in this cases (p<0.05).

Conclusions:

In childhood obesity, IIH should be kept in mind as a serious complication. Funduscopic examination is an easy method that suggests IIH. In particular, obese children with systemic hypertension and refractory headache should be considered for IIH.
Homoclinic solutions of 2nth-order difference equations containing both advance and retardation
Authors: Long Yuhua , Zhang Yuanbiao , Shi Haiping
Published: July 2016

By using the critical point method, some new criteria are obtained for the existence and multiplicity of homoclinic solutions to a 2nth-order nonlinear difference equation. The proof is based on the Mountain Pass Lemma in combination with periodic approximations. Our results extend and improve some known ones.
Fully degenerate poly-Bernoulli numbers and polynomials
Authors: Kim Taekyun , Kim Dae San , Seo Jong-Jin
Published: July 2016

In this paper, we introduce the new fully degenerate poly-Bernoulli numbers and polynomials and inverstigate some properties of these polynomials and numbers. From our properties, we derive some identities for the fully degenerate poly-Bernoulli numbers and polynomials.
Stabilization of a class of semilinear degenerate parabolic equations by Ito noise
Authors: Anh Cung The , Thanh Nguyen Van
Published: July 2016

We investigate the effect of Ito noise on the stability of stationary solutions to a class of semilinear degenerate parabolic equations with the nonlinearity satisfying an arbitrary polynomial growth condition. We will show that an Ito noise of sufficient intensity will stabilize the unstable stationary solution.
Performance Enhancement of One and Two-Shaft Industrial Turboshaft Engines Topped With Wave Rotors
Authors: Fatsis Antonios
Published: July 2016

Wave rotors are rotating equipment designed to exchange energy between high and low enthalpy fluids by means of unsteady pressure waves. In turbomachinery, they can be used as topping devices to gas turbines aiming to improve performance. The integration of a wave rotor into a ground power unit is far more attractive than into an aeronautical application, since it is not accompanied by any inconvenience concerning the over-weight and extra dimensioning. Two are the most common types of ground industrial gas turbines: The one-shaft and the two-shaft engines. Cycle analysis for both types of gas turbine engines topped with a four-port wave rotor is calculated and their performance is compared to the performance of the baseline engine accordingly. It is concluded that important benefits are obtained in terms of specific work and specific fuel consumption, especially compared to baseline engines with low compressor pressure ratio and low turbine inlet temperature.
Effects of Short-Term Free-Weight and Semiblock Periodization Resistance Training on Metabolic Syndrome
Authors: South Mark A. , Layne Andrew S. , Stuart Charles A. , Triplett N. Travis , Ramsey Michael , Howell Mary E. , Sands William A. , Mizuguchi Satoshi , Hornsby W. Guy , Kavanaugh Ashley A. , Stone Michael H.
Published: July 2016

South, MA, Layne, AS, Stuart, CA, Triplett, NT, Ramsey, MW, Howell, ME, Sands, WA, Mizuguchi, S, Hornsby, WG, Kavanaugh, AA, and Stone, MH. Effects of short-term free-weight and semiblock periodization resistance training on metabolic syndrome. J Strength Cond Res 30(10): 2682–2696, 2016—The effects of short-term resistance training on performance and health variables associated with prolonged sedentary lifestyle and metabolic syndrome (MS) were investigated. Resistance training may alter a number of health-related, physiological, and performance variables. As a result, resistance training can be used as a valuable tool in ameliorating the effects of a sedentary lifestyle including those associated with MS. Nineteen previously sedentary subjects (10 with MS and 9 with nonmetabolic syndrome [NMS]) underwent 8 weeks of supervised resistance training. Maximum strength was measured using an isometric midthigh pull and resulting force-time curve. Vertical jump height (JH) and power were measured using a force plate. The muscle cross-sectional area (CSA) and type were examined using muscle biopsy and standard analysis techniques. Aerobic power was measured on a cycle ergometer using a ParvoMedics 2400 Metabolic system. Endurance was measured as time to exhaustion on a cycle ergometer. After training, maximum isometric strength, JH, jump power, and V̇o
2peak increased by approximately 10% (or more) in both the metabolic and NMS groups (both male and female subjects). Over 8 weeks of training, body mass did not change statistically, but percent body fat decreased in subjects with the MS and in women, and lean body mass increased in all groups (p ≤ 0.05). Few alterations were noted in the fiber type. Men had larger CSAs compared those of with women, and there was a fiber-specific trend toward hypertrophy over time. In summary, 8 weeks of semiblock free-weight resistance training improved several performance variables and some cardiovascular factors associated with MS.
Acute Physiological and Performance Responses to High-Intensity Resistance Circuit Training in Hypoxic and Normoxic Conditions
Authors: Ramos-Campo Domingo J. , Rubio-Arias Jacobo Á. , Freitas Tomás T. , Camacho Arturo , Jiménez-Diaz José F. , Alcaraz Pedro E.
Published: July 2016

Ramos-Campo, DJ, Rubio-Arias, JÁ, Freitas, TT, Camacho, A, Jiménez-Diaz, JF, and Alcaraz, PE. Acute physiological and performance responses to high-intensity resistance circuit training in hypoxic and normoxic conditions. J Strength Cond Res 31(4): 1040–1047, 2017—The aim of this study was to analyze physical performance and physiological variables during high-intensity resistance circuit training (HRC) with the addition of 2 levels (moderate and high) of systemic hypoxia. Twelve resistance-trained young male subjects participated in the study. After a 6 repetition maximum testing session, participants performed 3 randomized trials of HRC: normoxia (NORM: fraction of inspired oxygen [FiO2] = 0.21; ∼0 m altitude), moderate hypoxia (MH: FiO2 = 0.16; ∼2.100 m altitude), or high hypoxia (HH: FiO2 = 0.13; ∼3.800 m altitude), as controlled by a hypoxic generator. Bench press force, heart rate and heart rate variability, rating of perceived exertion, resting metabolic rate, energy cost, and countermovement jump were assessed in each session. Heart rate variability in HH was significantly lower (standard deviation of all normal NN intervals [intervals between two “normal” beats] = 111.9 vs. 86.7 milliseconds; standard deviation of the difference between consecutive NN intervals = 19.5 vs. 17.0 milliseconds; p ≤ 0.05) in comparison with NORM. There were significant differences in rating of perceived exertion between NORM and HH (11.6 vs. 13.8 points). Peak and mean force on the bench press were significantly lower (p ≤ 0.05) in HH when compared with MH (peak: 725 vs. 488 N; mean: 574 vs. 373 N). Energy cost was significantly higher (p ≤ 0.01) in both hypoxic conditions compared with NORM (NORM: 10.4; MH: 11.7; HH: 13.3 kJ·min−1). There were no differences between conditions in heart rate and countermovement jump variables. These results indicate that hypoxic stimuli during HRC exercise alter physical performance and physiological variables and affect how strenuous the exercise is perceived to be. High-intensity resistance circuit training in hypoxia increases the stress on the performance and physiological responses, and these differences must be taken into account to avoid an excessive overload.
Effects of Low-Volume, High-Intensity Training on Performance in Competitive Swimmers: A Systematic Review
Authors: Nugent Frank J. , Comyns Thomas M. , Burrows Emma , Warrington Giles D.
Published: July 2016

Nugent, FJ, Comyns, TM, Burrows, E, and Warrington, GD. Effects of low-volume, high-intensity training on performance in competitive swimmers: a systematic review. J Strength Cond Res 31(3): 837–847, 2017—The purpose of this systematic review was to examine the extent and quality of the current research literature to determine the effects of low-volume, high-intensity training (HIT) on physiological performance and swimming performance in competitive swimmers. The methodology followed the preferred reporting items for systematic review and meta-analysis protocol. A search of relevant databases and conference proceedings was performed until December 2015. The inclusion criteria were (a) competitive swimmers, (b) ≥4 weeks HIT intervention, (c) comparison group had to involve a higher training volume, (d) outcome measures of physiological and swimming performance, and (e) all experimental study designs. Quality assessment was performed using the Quality Index checklist. Results indicate that of the 538 studies retrieved, 7 studies met the inclusion criteria. Six of the 7 studies found that an HIT intervention resulted in significant improvements in physiological performance. Four of the 7 studies found that HIT resulted in significant improvements in swimming performance, whereas none of the 7 studies resulted in a reduction in physiological or swimming performance. Despite the positive findings of this review, the short study duration is a limitation to a number of studies. The current evidence on the effects of HIT on performance is promising; however, it is difficult to draw accurate conclusions until further research has been conducted.
Variations in Oxidative Stress Levels in 3 Days Follow-up in Ultramarathon Mountain Race Athletes
Authors: Spanidis Ypatios , Stagos Dimitrios , Orfanou Marina , Goutzourelas Nikolaos , Bar-or David , Spandidos Demetrios , Kouretas Demetrios
Published: July 2016

Spanidis, Y, Stagos, D, Orfanou, M, Goutzourelas, N, Bar-or, D, Spandidos, D, and Kouretas, D. Variations in oxidative stress levels in 3 days follow-up in ultramarathon mountain race athletes. J Strength Cond Res 31(3): 582–594, 2017—The aim of the present study was the monitoring of the redox status of runners participating in a mountain ultramarathon race of 103 km. Blood samples from 12 runners were collected prerace and 24, 48, and 72 hours postrace. The samples were analyzed by using conventional oxidative stress markers, such as protein carbonyls (CARB), thiobarbituric acid reactive substances (TBARS), total antioxidant capacity (TAC) in plasma, as well as glutathione (GSH) levels and catalase (CAT) activity in erythrocytes. In addition, 2 novel markers, the static oxidation-reduction potential marker (sORP) and the capacity oxidation-reduction potential (cORP), were measured in plasma. The results showed significant increase in sORP levels and significant decrease in cORP and GSH levels postrace compared with prerace. The other markers did not exhibit significant changes postrace compared with prerace. Furthermore, an interindividual analysis showed that in all athletes but one sORP was increased, whereas cORP was decreased. Moreover, GSH levels were decreased in all athletes at least at 2 time points postrace compared with prerace. The other markers exhibited great variations between different athletes. In conclusion, ORP and GSH markers suggested that oxidative stress has existed even 3 days post ultramarathon race. The practical applications from these results would be that the most effective markers for short-term monitoring of ultramarathon mountain race–induced oxidative stress were sORP, cORP, and GSH. Also, administration of supplements enhancing especially GSH is recommended during ultramarathon mountain races to prevent manifestation of pathological conditions.
Medical management of secretory syndromes related to gastroenteropancreatic neuroendocrine tumours
Authors: Dimitriadis Georgios K , Weickert Martin O , Randeva Harpal S , Kaltsas Gregory , Grossman Ashley
Published: July 2016

Although recent epidemiological evidence indicates that the prevalence of non-functioning gastroenteropancreatic (GEP) neuroendocrine tumours (NETs) is rising, a significant number of GEP-NETs still present with symptoms related to the secretion of biologically active substances leading to the development of distinct clinical syndromes. In the past, these syndromes were associated with substantial morbidity and mortality due to the lack of specific therapies; however, since the introduction of long-acting somatostatin analogues and medications such as proton pump inhibitors, their control has been greatly improved. As a result, nowadays, the main cause of morbidity and mortality in GEP-NETs is mostly directly related to tumour growth and the extent of metastatic disease. However, in some patients with functioning tumours and extensive disease, control of the secretory syndrome still remains problematic, necessitating the employment of several cytoreductive techniques, which may not always be sufficient. Recently, new agents directed against tumour growth, or exerting increased binding activity to receptors expressed in these tumours, or interfering with the synthetic pathway of some of the compounds secreted by these tumours, have been developed. Since there are no specific guidelines addressing the totality of the management of the secretory syndromes related to GEP-NETs, this review aims at critically analysing the medical management of previously recognised secretory syndromes; it also addresses areas of uncertainty, assesses the newer therapeutic developments and also addresses recently described but poorly characterised secretory syndromes related to GEP-NETs.
Evaluación estadística de los niveles de mercurio detectados en peces de pico, en Costa Rica, en el periodo 2003-2013
Authors: Rodríguez-Yáñez Javier , Piedra-Marín Gilberto
Published: July 2016

Los peces de pico, como el marlín, el pez vela y el pez espada, son depredadores pelágicos superiores de la cadena alimenticia; los especímenes de gran tamaño contienen en sus tejidos niveles significativos de metilmercurio (MeHg+). En el presente trabajo se revisaron, clasificaron, tabularon y analizaron estadísticamente todos los registros de análisis del mercurio, realizados en el periodo 2003-2013 por el Laboratorio Nacional de Servicios Veterinarios (LANASEVE), en pescados de pico. Los niveles de mercurio tuvieron un comportamiento de distribución tipo Poisson; la mayoría de los análisis se asociaron con muestras que oscilaban en el rango de 0,2 mg Hg/kg a 0,4 mg Hg/kg pescado. Se observó una mayor dispersión en los niveles de mercurio en marlín, con respecto al pez espada. La concentración promedio del mercurio en el marlín fue de 0,583 mg de Hg/ kg de pescado, en tanto para el pez espada fue de 0,533 mg de Hg/ kg de pescado. Los Valores de Ingesta Semanal Tolerable Recomendada (ISTR) para el consumo del marlín fueron 165 g /semana para las mujeres embarazadas y 96 g /semana para la niñez, en tanto para pez espada fueron 180 g/semana y 105 g/semana, respectivamente. Los niveles de mercurio ligeramente mayores en marlín sugieren un menor consumo semanal comparado con el pez espada.
Crecimiento de juveniles de la corvina aguada, Cynoscion squamipinnis (Perciformes: Sciaenidae) en cautiverio
Authors: Boza-Abarca Jorge , Ramírez-Alvarado Marvin , Barquero-Chanto Juan , Calvo-Vargas Emilia , Berrocal-Artavia Karen
Published: July 2016

Peces juveniles de corvina aguada, Cynoscion squamipinnis, obtenidos a partir de desoves espontáneos en cautiverio fueron engordados por 355 días en la Estación de Biología Marina Juan Bertoglia Richards (Costa Rica). Ciento cincuenta y dos peces fueron sembrados en tanques de cuatro toneladas a una biomasa total de 82 g m-3, y alimentados con una dieta de 50% proteína, 17.5% carbohidratos, 11.8% lípidos, 16% ceniza y 5% humedad. El oxígeno disuelto fue de 7.12±1.13 mg L-1 (5.68 - 9.13 mg L-1), la salinidad de 31.92±1.65 ups (29.84 - 34.71 ups), y la temperatura de 27.54±0.63°C (26.50 - 28.60°C), condiciones similares a las del Golfo de Nicoya. El peso inicial promedio fue de 3.77±1.15 g (0.3 - 6.2 g).  El peso promedio final fue de 132.60±32.96 g (78.5 - 219.3 g). El crecimiento (C) fue de 128.83 g, con una tasa de crecimiento (TC) de 0.36 g d-1, y una tasa específica de crecimiento (TEC) de 1.00 % PC d-1. La tasa de crecimiento relativa (TCR) fue de 0.0053 g g-1 d-1. El factor de conversión alimenticia (FCA) durante todo el periodo fue de 1.8±0.4. La corvina aguada tuvo un crecimiento menor al de otras corvinas, mostró un comportamiento tranquilo, aceptó la dieta peletizada y fue fácil de manipular, por lo que es candidata para la maricultura.
El liderazgo del rectorado en los procesos de evaluación con fines de acreditación internacional
Authors: Bustos Aguirre Magdalena Liliana , Vega Cano Rosa , Rojo Morales Diana
Published: July 2016

El presente ensayo destaca el papel del rectorado en los procesos de evaluación y acreditación internacional de las instituciones de educación superior, pues su visión e involucramiento pueden contribuir a mantener el enfoque del proceso como medio para fomentar la calidad en la institución. Sin entrar en el debate que ha implicado la inclusión del concepto de calidad educativa, este trabajo trata de responder a la siguiente interrogante: ¿qué estilo de liderazgo deberá ejercer el rector o rectora de una institución de educación superior que se embarca en proceso de evaluación o acreditación internacional? El trabajo concluye que el liderazgo del rectorado es una piedra angular en el establecimiento de una cultura de calidad en las instituciones de educación superior, así como en los procesos de evaluación y acreditación internacional, y señala que los estilos de liderazgo más importantes en estos procesos son: el liderazgo transformacional, el liderazgo trascendente y el liderazgo transaccional.
Gestión del proceso de supervisión docente en el colegio Dr. Clodomiro Picado Twight, Circuito 02 de la Dirección Regional de Educación de Turrialba y Jiménez, para la evaluación del desempeño docente
Authors: Ramírez Méndez Sirleny
Published: July 2016

El presente artículo corresponde a un estudio sobre los enfoques de supervisión presentes en la gestión educativa; sus estrategias, factores positivos que se derivan de dicho proceso, así como las limitaciones que enfrentan quienes realizan esta función en los centros educativos y que inciden en la calidad educativa. La investigación se realizó en el Colegio Dr. Clodomiro Picado Twight de Turrialba y su propósito es analizar la gestión del proceso de supervisión docente en la institución, con el fin de establecer una propuesta para la evaluación del desempeño docente. El estudio es de carácter descriptivo, el cual muestra una incongruencia en la aplicación de un enfoque específico de supervisión, la necesidad de implementar más estrategias de supervisión docente, así como minimizar el impacto del factor limitante que obstaculiza los procesos de supervisión en la organización educativa. La propuesta de intervención se orienta a guiar la gestión, a ejercer un enfoque de supervisión democrática y participativa que considera al personal docente, administrativo y estudiantes en este proceso.
Prolactinomas may have unusual presentations resulting from massive extrasellar tumor extension
Authors: Berriel Marise Ribeiro de Sousa , Lima Giovanna Aparecida Balarini , Melo Alessandro Severo Alves de , Santos Maria Laura Vasconcelos dos , Rahhal Hassan , Taboada Giselle Fernandes
Published: July 2016

ABSTRACT The purpose of this case series is to report eight patients with giant prolactinomas emphasizing presentations and a treatment complication. The study group included six men and two women. The median age was 29 years (18–54 years); median serum prolactin level was 4,562 ng/ml (1,543–18,690 ng/ml); three patients (37.5%) had panhypopituitarism; median tumor diameter was 50 mm (41–60 mm). Five patients (62.5%) had visual field defects and three had improvement during treatment; six patients (75%) reached prolactin normalization, with a median time of 10.5 months (7–84 months) and median dose of 2.0 mg/week (1.0 to 3.0 mg/week). One patient presented as a true incidentaloma. One patient presented a cerebrospinal fluid leakage during medical treatment and refused surgery, however this resolved with conservative measures. This case series illustrate a rare subtype of macroprolactinomas, the importance of considering unusual presentations at the diagnosis, the effectiveness of pharmacological treatment and its possible complications.
Relationship between muscle strength and motor function in Duchenne muscular dystrophy
Authors: Nunes Milene F. , Hukuda Michele E. , Favero Francis M. , Oliveira Acary B. , Voos Mariana C. , Caromano Fátima A.
Published: July 2016

ABSTRACT Measuring muscle strength and motor function is part of Duchenne muscular dystrophy (DMD) assessment. However, the relationship between these variables is controversial. Objective To investigate the relationship between muscle strength and motor function and between these variables and age. Method Muscle strength was measured by Medical Research Council (MRC) scale and motor function, by Motor Function Measure (MFM), in 40 non-ambulatory patients. Spearman tests investigated the relationships between muscle strength, motor function and age. Results Total MRC and MFM scores were strongly related to each other (r = 0.94; p < 0.001), but not to age (r = -0.19, r = -0.31, respectively; p > 0.05). Strong and moderate relationships between partial muscle strength and motor function scores were found. Higher correlation coefficients were found between total scores and Dimensions 2 (axial/ proximal control) and 3 (distal control) of MFM. Conclusion Muscle strength and motor function are strongly correlated and seem to decrease proportionally in DMD.
Microstructural Development in a TRIP-780 Steel Joined by Friction Stir Welding (FSW): Quantitative Evaluations and Comparisons with EBSD Predictions
Authors: Medina Gladys Perez , Ferreira Hugo Lopez , Robledo Patricia Zambrano , Pérez Argelia Miranda , Valdés Felipe A. Reyes
Published: July 2016

Abstract The present work describes the effect of FSW on the result microstructure in the stir zone (SZ), thermo-mechanically affected zone (TMAZ), heat affected zone (HAZ) and base metal (BM) of a TRIP-780 steel. X-ray diffraction (XRD), optical microscopy (OM) and EBSD were used for determinations retained austenite (RA) in the SZ, It was found that the amount of RA developed in SZ was relatively large, (approximately 11% to 15%). In addition, recrystallization and the formation of a grain texture were resolved using EBSD. During FSW, the SZ experienced severe plastic deformation which lead to an increase in the temperature and consequently grain recrystallization. Moreover, it was found that the recrystallized grain structure and relatively high martensite levels developed in the SZ lead to a significant drop in the mechanical properties of the steel. In addition, microhardness profiles of the welded regions indicated that the hardness in both the SZ and TMAZ were relatively elevated confirming the development of martensite in these regions. In particular, to evaluate the mechanical strength of the weld, lap shear tensile test was conducted; exhibited the fracture zone in the SZ with shear fracture with uniformly distributed elongation shear dimples.
Wear Resistance Analysis of A359/SiC/20p Advanced Composite Joints Welded by Friction Stir Welding
Authors: Mata O. Cuevas , Pérez A. F. Miranda , Medina G. Y. Pérez , Vázquez F. J. García , Arizmendi A.
Published: July 2016

Abstract Advancement in automotive part development demands new cost-effective materials with higher mechanical properties and improved wear resistance as compared to existing materials. For instance, Aluminum Matrix Composites (AMC) shows improved mechanical properties as wear and abrasion resistance, high strength, chemical and dimensional stability. Automotive industry has focused in AMC for a variety of applications in automotive parts in order to improve the fuel economy, minimize vehicle emissions, improve design options, and increase the performance. Wear resistance is one of the most important factors in useful life of the automotive components, overall in those components submitted to mechanical systems like automotive brakes and suspensions. Friction Stir Welding (FSW) rises as the most capable process to joining AMC, principally for the capacity to weld without compromising their ceramic reinforcement. The aim of this study is focused on the analysis of wear characteristics of the friction-stir welded joint of aluminum matrix reinforced with 20 percent in weight silicon carbide composite (A359/SiC/20p). The experimental procedure consisted in cut samples into small plates and perform three welds on these with a FSW machine using a tool with 20 mm shoulder diameter and 8 mm pin diameter. The wear features of the three welded joints and parent metal were analyzed at constant load applying 5 N and a rotational speed of 100 rpm employing a Pin-on - Disk wear testing apparatus, using a sapphire steel ball with 6 mm diameter. The experimental results indicate that the three welded joints had low friction coefficient compared with the parent metal. The results determine that the FSW process parameters affect the wear resistance of the welded joints owing to different microstructural modifications during welding that causes a low wear resistance on the welded zone.
Identificación de Fases y Precipitados por MFA en Uniones de Acero Inoxidable Dúplex
Authors: López María Eugenia Herrera , Delgado Eduardo Hurtado , Torres David Torres , Morquecho Ana María Arizmendi
Published: July 2016

Resumen La Microscopía de Fuerza Atómica (MFA), técnica de caracterización que genera imágenes topográficas de superficies a muy altas resoluciones, opera registrando los detalles de relieve superficial del material con un cantiléver que se mueve sobre la muestra, mientras un detector piezoeléctrico monitorea los cambios de altura. Ésta técnica, adquiere relevancia en el campo de la identificación de fases, partículas y precipitados a niveles de nanoescala por lo que se propone para su identificación en la zona de fusión de componentes soldados y para la identificación temprana de fallas por agrietamiento. Es una técnica que no requiere de muestras conductoras, o la especial preparación metalográfica de probetas como es el caso de la microscopia electrónica. El material de estudio es un acero inoxidable dúplex 2205, unido por arco metálico y electrodo de tungsteno (GTAW). Al material soldado se le practicó ensayo de tensión. Las probetas fueron caracterizadas mediante microscopia óptica, microscopía electrónica de barrido, microscopía de fuerza atómica y pruebas de nanoindentación. Los resultados se concentran en la identificación de las características magnéticas, topográficas y dureza específicos de cada una de las fases, partículas y regiones presentes en el metal base, zona de fusión y la zona deformada por la fractura.
Classificando as pessoas e suas perturbações: a “revolução terminológica” do DSM III
Authors: Russo Jane , Venâncio Ana Teresa A.
Published: July 2016

A terceira versão do Diagnostic and Statistic Manual of Mental Disorders (DSM III), publicado pela American Psychiatric Association em 1980, implicou uma mudança de paradigma no conhecimento psiquiátrico vigente, tanto nos Estados Unidos quanto no contexto internacional em geral. Apresentamos um pequeno histórico dessa transformação e procuramos expor e discutir a nova arquitetura do manual e sua lógica classificatória. Construímos nossa argumentação em torno do destino reservado às antigas “neuroses” e aos novos “transtornos sexuais”.
O paradoxo do diagnóstico precoce de câncer
Authors: Martin Cristina Lindenmeyer-Saint
Published: July 2016

Como circunscrever o discurso do paciente que teve diagnóstico de câncer com técnicas de detecção precoce dessa doença? A partir de dois casos clínicos, tentamos desenvolver a idéia de um efeito traumático no paciente ao ser informado desta doença potencialmente mortal. Assistimos à recomposiçao do fantasma de morte com o enunciado do discurso médico, figura reduplicada dos pais não protetores. E o corpo constitui-se como um objeto “fobogênico”, lugar de projeção do traumático. Desta forma o sujeito instala-se numa posição de identificação ao agressor segundo os termos de Ferenczi. Durante o tempo em que o paciente se mantiver numa posição exterior em relação ao seu corpo libidinal – e será isto que facilitará o discurso médico – ele ficará hipnotizado pelo agressor, repetindo desta forma um comportamento infantil, de submissão aos maus pais. Despossuídos de seus próprios corpos, esses pacientes testemunham dos destinos pulsionais mais variáveis, chegando a formas mais mórbidas.
O lugar da psiquiatria no sistema de saúde brasileiro
Authors: Pinheiro Marcio de Vasconcellos
Published: July 2016

Depois de fazer considerações sobre o lugar do psiquiatra no sistema de saúde brasileiro, o autor, a partir de suas experiências trabalhando nos Estados Unidos, focaliza como os seguros e planos saúde podem tornar possível um bom atendimento de pacientes psiquiátricos, com custos eficientes.
O conceito freudiano de regressão e a prática da psicoterapia em ambulatório de hospital universitário
Authors: Moreira Ana Cleide Guedes
Published: July 2016

Este trabalho, examinando o conceito freudiano de regressão e, buscando identificar e analisar sua presença na prática da psicoterapia de orientação psicanalítica, em ambulatório público hospitalar, objetiva contribuir para a teoria da técnica psicoterápica.
Efeito de diferentes métodos de extração sobre a atividade antioxidante e o perfil de compostos fenólicos da folha de mandioca
Authors: Santos Mírian Aparecida Isidro , Simão Anderson Assaid , Marques Tamara Rezende , Sackz Adelir Aparecida , Corrêa Angelita Duarte
Published: July 2016

Resumo Folhas de mandioca (Manihot esculenta Crantz) são resíduos agroindustriais que apresentam potencial para o consumo humano, sendo fontes de proteínas, vitaminas, minerais e de substâncias antioxidantes, com destaque para os compostos fenólicos. No presente estudo, o objetivo foi identificar e quantificar os compostos fenólicos presentes em diferentes extratos da farinha de folhas de mandioca (FFM), cultivar Pão da China, e avaliar seu potencial antioxidante. A extração dos compostos fenólicos foi realizada utilizando três métodos de extração: a) refluxo com metanol/água (50:50, v/v); b) maceração com etanol/água (50:50, v/v) seguido de refluxo com acetona/água (70:30, v/v); c) maceração com metanol PA. A caracterização e quantificação foi realizada por cromatografia líquida de alta eficiência e a atividade antioxidante, determinada pelos métodos ABTS e β-caroteno/ácido linoleico. Foram encontrados cinco compostos fenólicos nos extratos da FFM: ácido gálico, galocatequina, catequina, ácido clorogênico e epigalocatequina, sendo a extração com metanol/água (50:50, v/v) a que revelou a presença do maior número destes compostos e o maior potencial antioxidante. Entre os fenólicos da FFM, independentemente do extrato, a catequina foi o majoritário. Pode-se inferir que a atividade antioxidante dos extratos da FFM está relacionada com a presença de compostos, pois a extração com maior teor desses compostos foi a que demonstrou maior potencial antioxidante.
A luta armada no cinema: ficção, documentário, memória.
Authors: Nichile Maria Cecília Ferreira De
Published: July 2016

Resumo No livro A luta armada no cinema: ficção, documentário, memória, Fernando Seliprandy analisa dois filme, O que é isso Companheiro? (1996) e Hércules 56 (2006), que narram um mesmo evento: o sequestro do embaixador norte americano Charles Burke Elbrick, realizado pela ação guerrilheira em curso no Brasil no ano de 1969. Com a descrição do material audiovisual, o livro pretende apreender o uso da imagem fílmica na construção da memória histórica, bem como intenta chegar a possíveis conclusões historiográficas pela observação das relações entre o que é mostrado no discurso cinematográfico e aquilo que está além da narrativa, na conjuntura histórica da qual essas fitas emergiram.
Cagnin e as narrativas gráficas: histórias em quadrinhos como objeto de pesquisa
Authors: Gonçalves Edilaine Correa
Published: July 2016

Resumo: O título recentemente publicado é fruto de trabalho acadêmico de mestrado defendido, em 1974, por Antonio Luiz Cagnin quando, inovadoramente, procurava sistematizar o processo de leitura e reconhecimento das histórias em quadrinhos como forma de expressão, diferenciando-as de outras modalidades narrativas, e destacando o emprego de elementos característicos que possibilitam ao leitor criar os nexos entre imagens e textos, dispostos de forma a propiciar a geração de sentidos.
Cosplay e cosplayers: quando a cultura pop é levada a sério
Authors: Heller Barbara
Published: July 2016

Resumo: Cena Cosplay: comunicação, consumo, memória nas culturas juvenis, organizado por Monica Rebecca Ferrari Nunes, apresenta os resultados de pesquisa com financiamento do CNPq levado a termo por investigadores que a autora coordena no grupo vinculado ao Programa de Pós-Graduação em Comunicação e Práticas de Consumo da ESPM, - SP. Dividido em sete partes, além da apresentação, o livro trabalha em mão dupla: as memórias das narrativas que despertaram o interesse para a prática cosplay e seu "inverso", isto é, as estratégias pelas quais a cena cosplay garante sua memória nas culturas juvenis. Iuri Lotman, Paul Zumthor, Marshall McLuhan, Monica Rebecca Ferrari Nunes, Roger Silverstone, Mircea Eliade, entre outros, dão sustentação teórica às conclusões dos dez autores dos capítulos que frequentaram, entre 2012 e início de 2014, os eventos dos animês em São Paulo, Belo Horizonte, Rio de Janeiro e Vitória.
Desafios éticos e políticos no vídeo Vida Estelita, subjetividades políticas em devir
Authors: Melo Cristina Teixeira Vieira de
Published: July 2016

Resumo Vida Estelita é um registro memorialístico da ocupação do Cais José Estelita, em Recife, em meados de 2014. Os entrevistados falam não apenas da luta pelo terreno, mas do desejo de novas formas de vida. Os realizadores excluíram da edição final trechos dos depoimentos em que os jovens, ao confrontarem a ordem estabelecida, se expunham mais fortemente. Neste contexto, Vida Estelita reabre a discussão sobre a ética no documentário: como representar o outro? Como fazê-lo de maneira a não diminuir a sua potência? Como não camuflar as formas de vida em luta? Esses dilemas éticos acentuam-se no caso de um cinema militante em que "o filme que se queria fazer se contrapõe aquele que deveria ser feito".
Mas afinal, o que sobrou do cinema? A querela dos dispositivos e o eterno retorno do fim.
Authors: Ramos Fernão Pessoa
Published: July 2016

Resumo O que o filme faz que outras imagens móveis não fazem, quando não são filmes, é fechar-se em copas sobre a duração. Oferece ao espectador um jogo jogado. O filme é uma espécie de tanquinho que bate a matéria do tempo para poder fruí-la torcida, com emoção. Pois um filme, como uma sinfonia, passa em direção a um final que já está dado a cada instante, a cada plano. Final que existe nele e não é só 'happy end'. É sua arte de ser pela duração - à diferença de uma pintura ou foto na parede. Por isso, o cinema pendurado, ou instalado, não é filme e deixa de ser cinema. É o filme que faz variar o dispositivo e não o inverso. A querela sobre o que 'restou' do cinema tem no âmago suas 'mortes' e esta espécie de grande Leviatã que é o 'cinema expandido'.
Pensar la materialidad de los afectos con Giordano Bruno
Authors: Bulo Valentina
Published: July 2016

Resumen Este ensayo se propone hacer una lectura del texto "De los vínculos en general" de Giordano Bruno a partir de su propia reelaboración de la idea de materia y en vistas al planteamiento actual de la afectividad. No buscamos hacer una lectura historiográfica de Bruno sino más bien nos esforzamos en traer su filosofía para replantearla desde nuestras actuales problemáticas. Para esto partiremos describiendo algunos rasgos relevantes de la idea de materia en Giordano Bruno para luego desde allí acercarnos a su teoría general de los vínculos. Finalmente realizaremos algunas consideraciones de la afectividad a partir de los vínculos brunianos.
Avaliação da atividade angiogênica da solução aquosa do barbatimão (Stryphnodendron adstringens)
Authors: CHAVES D.A , LEMES S.R. , ARAUJO L.A. , SOUSA M.A.M. , FREITAS G.B. , LINO-JUNIOR R.S. , MRUE F. , MELO-REIS P.R.
Published: July 2016

RESUMO O Barbatimão (Stryphnodendron adstringens) planta medicinal encontrada no bioma Cerrado apresenta propriedades físico-químicas que lhe garante importantes atividades farmacológicas tais como: anti-inflamatória, analgésica e uma atividade protetora da mucosa gástrica. A casca do tronco é a principal matéria-prima usada para o desenvolvimento de produtos medicinais. Neste estudo, o objetivo foi investigar a influência da solução aquosa da casca do barbatimão no processo de formação de vasos sanguíneos na membrana corioalontoide de ovo embrionado de galinha. Foram utilizadas 30g da casca triturada em um litro de água. Este processo permitiu a obtenção da Solução Aquosa de Barbatimão - SAB em uma concentração de 30mg/mL. A atividade angiogênica da solução aquosa do barbatimão foi avaliada mediante realização de testes laboratoriais “in vivo”, utilizando como modelo experimental a membrana do ovo embrionado de galinha (MCA). Utilizou-se como controle indutor o Regederm®, o qual apresenta atividade angiogênica conhecida. Os resultados demonstraram que a SAB apresentou um percentual de vascularização na MCA de (50.4%) não tendo diferença (p>0,05) aos valores detectados no controle indutor (52,9%). Com os resultados obtidos, percebe-se que o barbatimão apresenta atividade angiogênica no modelo experimental utilizado.
Toxicidade subaguda do extrato etanólico das folhas de Myracrodruon urundeuva sobre o ciclo estral de ratas Wistar
Authors: OLIVEIRA J.M.G. , PEREIRA L.J.C. , MOURA E.R. , SOUSA M.R.S.C. , SALES P.A.B. , SILVA S.M.M.S. , LIRA S.R.S. , COSTA A.P.R.
Published: July 2016

RESUMO A fitoterapia, abrangendo o uso popular e empírico de plantas medicinais no combate e prevenção de doenças, deve ser aliada a estudos científicos que comprovem a eficácia e segurança desses compostos. No Brasil, a ampla biodiversidade vegetal da região nordeste favorece o uso e estudo de plantas com potenciais terapêuticos. A Aroeira do Sertão (Myracrodruon urundeuva Allem.) é uma espécie pertencente à família Anacardiaceae, comum no semiárido, desde o Piauí até Minas Gerais. Seu uso é diverso e disseminado por todo o País, sendo indispensáveis estudos de suas potencialidades e riscos. Devido à ampla utilização da Myracrodruon Urundeuva de forma empírica, este trabalho tem por objetivo a pesquisa de efeitos tóxicos com doses repetidas do extrato etanólico de Myracrodruon urundeuva Allem. (EEMU) e sua influência no ciclo estral de ratas Wistar. No protocolo de toxicidade subaguda foram utilizadas 25 ratas Wistar, divididas em 5 grupos (n=5), tratadas com diferentes doses do EEMU (125, 250, 500 e 1000 mg/kg) e água destilada (controle) por um período de 28 dias. Nesse período foram realizadas mensurações do consumo de água e ração e avaliação comportamental. Esses animais foram avaliados diariamente quanto a fase do ciclo estral, por meio de esfregaço vaginal a fresco, sendo observada a frequência de cada fase bem como o intervalo interestro. As ratas foram anestesiadas e o sangue foi coletado para a realização dos ensaios bioquímicos. Em seguida, foram eutanasiadas para coleta e avaliação dos órgãos internos. Durante o período de avaliação, não foram observadas alterações de comportamento, nem de consumo de água ou ração. A evolução ponderal dos animais não diferiu entre os grupos tratados. A concentração sérica de ALT foi maior nos animais tratados com EEMU 1000 mg/kg. As ratas tratadas com o extrato não apresentaram alterações significativas na frequência das fases do ciclo estral bem como duração do estro e intervalo entre estros, quando comparadas ao grupo controle. Os resultados obtidos neste estudo não apontam alterações tóxicas significativas, sistêmicas ou sobre o ciclo estral, de ratas Wistar tratadas com o extrato, nas doses avaliadas, por um período de 28 dias.
Common bean seeds quality during storage under treatments with potential repellent of aromatic plants
Authors: PACHECO F.P. , NOBREGA L.H.P.N. , TONINI M. , CRUZ-SILVA C.T.A.
Published: July 2016

ABSTRACT ndustrial chemicals that control pests in stored seed can cause damage to health by residual effects remaining in the grains. Studies of products with potential insecticide and repellent properties are required to decrease post-harvest losses. Thus, the aim of this study was to evaluate the quality and efficiency of seed treatment in beans stored under the following treatments: dried leaves and crushed laurel (Laurus nobilis L.), rosemary (Rosmarinus officinalis L.) and basil (Ocimum basilicum L.), cinnamon powder (Cinnamomum zeylanicum Breyn) and ground cloves (Syzygium aromaticum L.) over eight months. An untreated control and a treatment with diatomaceous earth were used to compare the results. At the beginning and at 30 days, percentages of normal and abnormal seedlings as well as seeds that did not germinate, mass of onehundred seeds, water content and infested seeds were analyzed. At 210 and 240 days, free choice arena and repellency testswere conducted. Treatments did not affect germination, mass of 100 seeds or water content; however, all plants tested showed a repellent effect on the bean weevil.