bluuebunny/crossref_metadata_2025 huggingface dataset:
Dynamic Analysis of an Existing Arch Railway Bridge According to Eurocodes
Authors: Oleszek R. , Radomski W.
Published: February 2017

Modern regulations concerning railway bridges are based on the approach of structural dynamics, which is described in PN-EN standards. This paper presents the results of theoretical dynamic analysis of the HSLM-A train set loading on the structure of a pre-stressed concrete arch bridge - the first railway bridge of its type which was built in Poland (completed in 1959). The recommendations of PN-EN have been followed and modal analysis was carried out to define the sensitivity of the structure to chosen eigenforms. Additionally the paper presents a course of calculations and the conclusions obtained from the analysis of displacements, accelerations, and bending moments induced in the structure through a simulated passage of a high-speed train in the context of the requirements of PN-EN Standards. The conclusions from the current calculations can be used for dynamic analysis of bridges of similar structural solutions.
The influence of atmospheric conditions on the migration of diesel fuel spilled in soil
Authors: Vuruna Mladen , Veličković Zlate , Perić Sreten , Bogdanov Jovica , Ivanković Negovan , Bučko Mihael
Published: January 2017

The most common chemical’s spills in typical transportation accidents are those with petroleum products such as diesel fuel, the consequence of which is an extensive pollution of the soil. In order to plan properly fuel recovery from the soil, it is important to gain information about the soil depth which may be affected by pollutant and to predict the pollutant concentration in different soil layers. This study deals with the impact of basic atmospheric conditions, i.e. air temperature and humidity on the diesel fuel migration through the soil. The diesel fuel was spilled into columns (L = 30 cm; D = 4.6 cm) filled with sandy and clay soil samples, and its concentrations at various depths were measured after 11 days under various air temperature (20 and 40°C) and relative humidity (30–100%) conditions. The effects observed were explained by understanding physical processes, such as fuel evaporation, diffusion and adsorption on soil grains. The increase in temperature results in higher fuel evaporation loss and its faster vertical migration. The relative humidity effect is less pronounced but more complex, and it depends much on the soil type.
Parametric study of fluid flow and heat transfer over louvered fins of air heat pump evaporator
Authors: Muszyński Tomasz , Kozieł Sławomir Marcin
Published: January 2017

Two-dimensional numerical investigations of the fluid flow and heat transfer have been carried out for the laminar flow of the louvered fin-plate heat exchanger, designed to work as an air-source heat pump evaporator. The transferred heat and the pressure drop predicted by simulation have been compared with the corresponding experimental data taken from the literature. Two dimensional analyses of the louvered fins with varying geometry have been conducted. Simulations have been performed for different geometries with varying louver pitch, louver angle and different louver blade number. Constant inlet air temperature and varying velocity ranging from 2 to 8 m/s was assumed in the numerical experiments. The air-side performance is evaluated by calculating the temperature and the pressure drop ratio. Efficiency curves are obtained that can be used to select optimum louver geometry for the selected inlet parameters. A total of 363 different cases of various fin geometry for 7 different air velocities were investigated. The maximum heat transfer improvement interpreted in terms of the maximum efficiency has been obtained for the louver angle of 16 ° and the louver pitch of 1.35 mm. The presented results indicate that varying louver geometry might be a convenient way of enhancing performance of heat exchangers.
Memetic pool as a new approach in service quality analysis
Authors: Stepaniuk Krzysztof
Published: January 2017

This paper attempts to decompose, as well as perform a quantitative and qualitative analysis of the way to externalize the perception of the accommodation service. The research material consisted of the opinions of users of accommodation facilities, located in the vicinity of the twelve selected national parks in Poland. It was assumed that the reflection of the perception of the quality of the service process is the transfer of intangible content related to the service itself, which can be externalized, among other things, through entries in social networks.

The study was conducted based on the theory of memes as cultural information carriers. According to this theory, in such a transmission, it is possible to distinguish certain components, which can be defined as memes. Therefore, it is possible to analyse and track their presence, transfer, as well as incidence. A memetic pool was constructed using the assumptions of the perceptual-cognitive model of the formation of the tourism image. It was a direct expression of the mental changes of the recipient, resulting from the use of the service.

Studies of this type are intended to optimize the design of services in terms of building positive relationships on the line service provider-customer. At the same time, they allow for a slightly different, evolutionary approach to analyses, concerning the formation of the image of the service provider, as well as forming the expectations of service recipients.
Dendrite Growth Characteristics and Segregation Control of Bearing Steel Billet with Rotational Electromagnetic Stirring
Authors: Xu Yu , Xu Xiu-Jie , Li Zhuang , Wang Tao , Deng An-Yuan , Wang En-Gang
Published: January 2017

The effects of rotational electromagnetic stirring (R-EMS) on dendrite growth characteristics and segregation control of bearing steel billet were investigated in continuous casting. The results show that applying R-EMS can promote columnar-equiaxed transition, increase the region of the equiaxed grain from 5 % to 45 %, decrease the secondary dendrite arm spacing (SDAS), and reduce the segregation of both carbon and sulfur. Meanwhile, the fragments of dendrite arms induced by R-EMS are observed. The length of the dendrite fragmentation is approximately 1.5 mm, 7–10 times the SDAS. Some fragments can partially remelt to become effective nuclei, and some fragments survive the solidification process.
The Dutch Technical-Tactical Tennis Test (D4T) for Talent Identification and Development: Psychometric Characteristics
Authors: Kolman Nikki , Huijgen Barbara , Kramer Tamara , Elferink-Gemser Marije , Visscher Chris
Published: February 2017

This study examined the test-retest reliability, validity and feasibility of the newly developed Dutch Technical-Tactical Tennis Test (D4T). This new test is relevant for talent identification and development in tennis. Thirty-two youth male tennis players (age 13.4 ± 0.5) were classified as elite (n = 15) or sub-elite (n = 17) according to their position on the national youth ranking list under 15 years (cut-off rank 50) in the Netherlands. Games, rallies and different tactical situations (i.e. offensive, neutral and defensive) were simulated with a ball machine. Players had to return 72 balls to predetermined target areas. Stroke quality was recorded based on ball velocity and accuracy (VA-index), as well as percentage errors. Test-retest reliability was assessed by comparing differences between the first and second test-session (n = 10). An intraclass-correlation coefficient of .78 for the VA-index was found (p < .05), indicating excellent test-retest reliability. Independent t-tests revealed that elite players outscored sub-elite players for the VA-index, ball velocity, accuracy and percentage errors (p < .05), supporting good validity. Furthermore, a high correlation was found between the VA-index and individual positions on the youth ranking list (p = -.75; p < .001). The assessment of feasibility indicated that the D4T was applicable for instructors and coaches. In conclusion, the D4T was shown to be a reliable, valid and feasible test to measure technical-tactical characteristics of tennis performance in youth players.
Improvement of the Flavor and Quality of Watermelon Vinegar by High Ethanol Fermentation using Ethanol-Tolerant Acetic Acid Bacteria
Authors: Chen Yang , Bai Ye , Li Dongsheng , Wang Chao , Xu Ning , Hu Yong
Published: January 2017

Acetic acid fermentation is an essential step in the production of high-quality fruit vinegar and typically involves the use of acetic acid bacteria (AAB). The present study showed that the high cell mass and acetic acid yields of ethanol-tolerant AAB under high ethanol conditions were related to the high activities and stability of both pyrroloquinoline quinone (PQQ)-dependent alcohol dehydrogenase and PQQ-dependent aldehyde dehydrogenase. Additionally, in acetic acid fermentation with watermelon wine (8 % ethanol), the main organic acids (acetic, tartaric and malic acids) produced by ethanol-tolerant Acetobacter pasteurianus AAB4 were higher than those by conventional A. pasteurianus AS1.41 (1.42-fold, 3.53-fold and 2.12-fold, respectively). Also, the main esters (ethyl acetate and phenylethyl acetate) produced by AAB4 were higher than those by AS1.41 (1.69-fold and 1.48-fold, respectively). In addition, the total sweet and umami free amino acids produced by AAB4 increased significantly. According to sensory analysis, the flavor, taste and overall acceptance score of watermelon vinegar produced by AAB4 were significantly higher than those by AS1.41. Therefore, high ethanol fermentation with ethanol-tolerant AAB improved the flavor and quality of watermelon vinegar, indicating that this technology can be applied to fruit vinegar production.
Cross-curricular approaches in Inquiry-based Science Teaching
Authors: Spodniaková Pfefferová Miriam , Holec Stanislav , Raganová Janka , Hruška Martin
Published: January 2017

One of the most important goals of science education is to develop understanding of natural systems. It is impossible to comprehensively understand the functioning of natural systems only by knowledge of one subject (physics, chemistry, biology, etc.). Therefore the application of the cross-curricular approach in teaching of science subjects is required. Besides the scientific knowledge the understanding of science research methods is important, too. This can be obtained with the use of inquiry-based activities in science lessons that provide possibilities to show students how science works. The aim of this paper is to introduce the strategy for the use of cross-curricular approaches in inquiry-based activities in science education that was implemented within the Chain Reaction project. The project targeted 14- to 16-year-old students who in groups investigated an interdisciplinary research problem and then presented their findings and experiences at national or international events. Cosmic Web Site represents an example of the activity that encourages students to learn various topics of physics as well as to use their knowledge and skills obtained at computer science lessons. The feedback from the teachers involved in Chain Reaction that was gained with the help of evaluation questionnaires indicates a positive impact of the used approach to the development of students’ skills and motivation to learn science subjects.
Effect of Salacia reticulata W. and Clitoria ternatea L. on the cognitive and behavioral changes in the streptozotocin-induced young diabetic rats
Authors: Rajashree R. , Patil Rajani , Khlokute Sanjiva D. , Goudar Shivaprasad S.
Published: January 2017

Background:

Diabetes mellitus (DM) of juvenile onset affects both the peripheral and central nervous systems (CNS). However, central effects are less documented and studied than peripheral deficits. Currently, the only feasible treatment available for type 1 DM (T1DM) is insulin which has its own limitations. Hence, an alternative therapy, especially a newer herbal formulation is very much the need of the time. The present study aimed to determine the effects of the alcoholic extracts of roots of the Salacia reticulata W. (SR) and Clitoria ternatea L. (CT) on cognitive and behavioral changes in juvenile diabetic rats.

Methods:

Diabetes was induced in 25-day-old Wistar rats by streptozotocin (50 mg/kg bw, IP). Animals were divided into seven groups (n=6). Rats were treated with root extracts of SR and CT (100 mg/kg BW each) for 30 days, from day 1 and day 20 of diabetes confirmation. Then, rats were tested in elevated plus maze (EPM) and Morris water maze (MWM).

Results:

A statistically significant (p<0.05) difference was observed between the SRCT group and diabetic groups of rats. Apart from decreasing FBS, the combined therapy also proved beneficial as nootropic agent in rats with early-onset diabetes. However, significant improvement is observed only in the learning and memory among preventive group, but not in the curative group.

Conclusions:

SRCT, a herbal formula, when used in combination, has a more potent effect in preventing the deleterious effects of juvenile diabetes on cognitive and behavioral changes.
Advantages of 3D ultrasound in the assessment of fetal abnormalities
Authors: Merz Eberhard , Pashaj Sonila
Published: February 2017

Three-/four-dimensional (3D/4D) imaging enables a more detailed survey of the embryo and the fetus compared to two-dimensional (2D) ultrasound. The availability of several display modes and standardized examinations permits the demonstration of both the normal and abnormal fetal anatomy in controlled planes and rendered images from different angles. This allows the demonstration of even subtle fetal defects in an ideal sectional plane in a precisely rendered surface or transparent image viewed from an optimal angle. When counseling the parents, the rendered images can help them understand the severity of an existing malformation or, conversely, ensure them of the absence of any fetal abnormality. This is particularly useful in cases with an increased recurrence risk of a specific fetal malformation.
Clinical efficacy and safety of tripterygium glycosides in treatment of stage IV diabetic nephropathy: A meta-analysis
Authors: Hong Yan , Gui Zhihong , Cai Xiaoping , lan Lejian
Published: February 2017

The aim of this meta-analysis was to evaluate the clinical efficacy and safety of tripterygium glycosides in treatment of stage IV diabetic nephropathy. Methods Through searching the PubMed and CNKI databases, the open published clinically controlled trials related to efficacy and safety of tripterygium glycosides in the treatment of stage IV diabetic nephropathy were collected. The pooled total efficacy, 24h urinary protein, serum creatinine and tripterygium glycosides related toxicity were calculated using Stata 11.0 software. Results Fourteen publications including 992 subjects (512 in the experimental group and 480 in the control group) were included in this study. Eight studies reported the total clinical efficacy comparing the experiment and control groups. No significant statistical heterogeneity was found in total efficacy (I2=24.9%, p>0.05). Thus, the combined odds ratio (OR) was pooled by fixed effect model. The pooled OR=4.16 with its 95% CI 2.71~6.37 (p<0.05), which indicated the total efficacy in the experiment group, was significant higher than that of control group (p<0.05); Thirteen studies reported the post-treatment 24h urinary protein value. Statistical heterogeneity analysis indicated significant heterogeneity across studies (I2=91.1%, p<0.05); that data was pooled by a random effects model. The combined standardized mean difference (SMD) was -1.55 with its 95% I -2.06~1.03, (p<0.05). The results indicated that post-treatment 24h urinary protein in the experiment group was significant lower than that in control group (p<0.05); Ten studies reported the post-treatment serum creatinine. Significant heterogeneity existed across those studies (I2=82.3%, p<0.05). Thereafter, the data was pooled by a random effect model. The combined standardized mean difference (SMD) was −0.24 with its 95%CI −0.40~0.09, (p<0.05). The results indicated that the post-treatment serum creatinine in experiment group was significant lower than that of control group (p<0.05); Eight studies reported tripterygium glycoside-associated toxicity such as liver function damage, gastrointestinal reactions and menstrual disorders. With no statistical heterogeneity among the studies, the data was pooled by fixed effect model. The pooled OR=6.42 (95%CI 2.23~18.48, p<0.05). The pooled results showed the tripterygium glycoside- associated toxicity incidence rate was significant higher in the experiment group than that of the control group (p<0.05); There were no publication bias for effect size of total efficacy, 24h urinary protein, and serum creatinine. However, for tripterygium glycoside-related toxicity, the publication bias was significant (t=-3.55, p<0.05). Conclusion The present evidence shows that tripterygium glycosides can improve clinical efficacy, reduce the 24h urinary protein and serum creatinine, but that they increase the tripterygium glycoside-related toxicity in treatment of stage IV diabetic nephropathy.
Memories of the 1999 NATO Bombing in Belgrade, Serbia
Authors: Fridman Orli
Published: February 2017

This paper analyses the memories of Belgrade residents of the 1999 NATO bombing of Serbia (then part of the Federal Republic of Yugoslavia). By focusing on the memories of this event, yet placing them in a broader context of the conflicts of the 1990s—the breakup of Yugoslavia and the post-Yugoslav wars—this essay explores what international intervention has meant to respondents in Belgrade by documenting memories of international intervention among older and younger generations, as well as among active members of antiwar NGOs in Serbia and citizens who were not engaged in activism during the 1990s. The paper aims to expand the scope of the discussions on dealing with the past and on transitional justice in the Western Balkans and to place them in the context of social memory studies and the study of post-conflict transformation processes. Furthermore, by presenting the case study of Serbia, this text contributes to the analysis of local mnemonic batt les as part of the creation of collective memories of the 1990s in post-Milošević Serbia, and it sheds light on the memories of the bombing as related to the war in Kosovo and the subsequent effects on shaping postwar Serbia–Kosovo relations.
Mensaje póstumo para el Dr. Nietzsche
Authors: Cortés del Moral Rodolfo
Published: February 2017

En este texto se busca mostrar que en la obra de Nietzsche no se desarrolla una concepción filosófica en sentido estricto, sino un modo de reflexión alternativo en el que las ideas y concepciones filosóficas establecidas son sometidas a un perspectivismo radical merced al cual son situadas en un juego de significaciones en el que muestran implicaciones que exceden a las expectativas de sus autores y de sus contextos.
Mitofusin 2 attenuates the histone acetylation at collagen IV promoter in diabetic nephropathy
Authors: Mi Xuhua , Tang Wanxin , Chen Xiaolei , Liu Fei , Tang Xiaohong
Published: February 2017

Extracellular matrix (ECM) increase in diabetic nephropathy (DN) is closely related to mitochondrial dysfunction. The mechanism of protective function of mitofusin 2 (Mfn2) for mitochondria remains largely unknown. In this study, the molecular mechanisms for the effect ofMfn2on mitochondria and subsequent collagen IV expression in DN were investigated. Ras-binding-deficient mitofusin 2 (Mfn2–Ras(Δ)) were overexpressed in rat glomerular mesangial cells, and then the cells were detected for mitochondrial morphology, cellular reactive oxygen species (ROS), mRNA and protein expression of collagen IV with advanced glycation end-product (AGE) stimulation. Preliminary results reveal that the mitochondrial dysfunction and the increased synthesis of collagen IV after AGE stimulation were reverted byMfn2–Ras(Δ) overexpression. Bioinformatical computations were performed to search transcriptional factor motifs in the promoter region of collagen IV. Three specific regions for TFAP2A binding were identified, followed by validation with chromatin immunoprecipitation experiments. Knocking down TFAP2A significantly decreased the TF binding in the first two regions and the gene expression of collagen IV. Furthermore, results reveal thatMfn2–Ras(Δ) overexpression significantly mitigated TFAP2A binding and also reverted the histone acetylation at Regions 1 and 2 after AGE stimulation. In streptozotocin-induced diabetic rats,Mfn2–Ras(Δ) overexpression also ameliorated glomerular mesangial lesions with decreased collagen IV expression, accompanied by decreased acetylation and TFAP2A binding at Region 1. In conclusion, this study highlights the pathway by which mitochondria affect the histone acetylation of gene promoter and provides a new potential therapy approach for DN.
Trends in the Diagnosis of Vitamin D Deficiency
Authors: Basatemur Emre , Horsfall Laura , Marston Louise , Rait Greta , Sutcliffe Alastair
Published: February 2017

BACKGROUND:

Vitamin D has attracted considerable interest in recent years, and health care providers have reported large increases in vitamin D test requests. However, rates of diagnosis of vitamin D deficiency in clinical practice have not been investigated. We examined trends in diagnosis of vitamin D deficiency in children in England over time, and by sociodemographic characteristics.

METHODS:

Cohort study using primary care records of 711 788 children aged 0 to 17 years, from the Health Improvement Network database. Incidence rates for diagnosis of vitamin D deficiency were calculated per year between 2000 and 2014. Rate ratios exploring differences by age, sex, ethnicity, and social deprivation were estimated using multivariable Poisson regression.

RESULTS:

The crude rate of vitamin D deficiency diagnosis increased from 3.14 per 100 000 person-years in 2000 (95% confidence interval [CI], 1.31–7.54) to 261 per 100 000 person-years in 2014 (95% CI, 241–281). After accounting for changes in demographic characteristics, a 15-fold (95% CI, 10–21) increase in diagnosis was seen between 2008 and 2014. Older age (≥10 years), nonwhite ethnicity, and social deprivation were independently associated with higher rates of diagnosis. In children aged <5 years, diagnosis rates were higher in boys than girls, whereas in children aged ≥10 they were higher in girls.

CONCLUSIONS:

There has been a marked increase in diagnosis of vitamin D deficiency in children over the past decade. Future research should explore the drivers for this change in diagnostic behavior and the reasons prompting investigation of vitamin D status in clinical practice.
Polysilane-Based Thin Films with High Photosensitivity
Authors: Simmons-Potter K. , Jamison G. M. , Potter B. G. , Thomes W. J. , Phifer C. C.
Published: February 2017

The present work investigates the intrinsic photosensitivity of a family of poly(alkyl)(aryl)silanes and poly(hydridophenyl)silane for use in the development of photoimprinted waveguide devices. Limited testing of passive optical behavior (e.g. absorption, refractive index) and photosensitive response was performed for these materials in thin film form. It was determined that the materials exhibited dramatic photobleaching under 248 nm (KrF excimer laser) exposure. Based on a Kramers-Kronig analysis of the absorption changes, refractive index changes on the order of - 0.1 are estimated. Confirmation of this calculation has been provided via ellipsometry which estimates refractive index changes at 632 nm of -0.14 ± 0.01. In addition, embedded strips have been photoimprinted into the material to confirm waveguiding capacity of the films. Possible sources of photosensitivity in this material and its potential for application in various device configurations will be discussed.
A Statistical Approach to the Effect of Sol-Gel Process Variables on the Physical Properties of Polymer [PLLA]-Silica Hybrid Materials for Use as Biomaterials
Authors: Perry Carole C. , Eglin David , Ali Saad A.M. , Downes Sandra
Published: February 2017

Hybrid poly(L-lactic acid)-silica materials for potential use in orthopaedic applications have been prepared by a sol-gel method using an experimental design approach to investigate the effect of synthesis variables separately and together on the physical form of the organic polymer. The five factors investigated were the molar ratios of tetraethyl orthosilicate (TEOS)/Poly(Llactic acid) (PLLA), Toluene/PLLA, EtOH/TEOS, Water/TEOS and HCl (catalyst)/TEOS. All other synthesis conditions were kept constant. X-Ray powder diffraction (Statton's graphical method) and differential scanning calorimetry were used to assess the extent of polymer crystallinity in the hybrid materials. In accordance with other studies, increasing the molar ratio of TEOS/PLLA lead to increasing incorporation of the organic polymer into the silica network. Increase of the toluene/PLLA molar ratio lead to an increase in the crystallinity of the polymer phase. As our studies investigated the effect of synthesis variables simultaneously it was possible to identify, for the first time, that interactions between specific reactants are important in the development of the two structural components of this hybrid system. The most important of these was the TEOS/PLLA*H2O/TEOS interaction that may indicate that silica species from hydrolysed TEOS interact with the PLLA phase possibly via hydrogen bonding and leads to the lowering of the crystalline order of the polymer The results from this study give useful information on the ability of the organic polymer and the silica phase to form interpenetrating networks, an important requirement for the generation of a potential hybrid polyester-silica biomaterial for orthopaedic applications.
Synthesis and Characterisation of Organo Phyllosilicates Containing Both Si, Al, and Mg
Authors: Jaber Maguy , Miehe-Brendle Jocelyne , Dred Ronan Le
Published: February 2017

Hybrid materials like organo-phyllosilicates exhibit new properties which make them potential candidates for many industrials applications as rubber reinforcement, environmental barriers…. With this aim, a series of new layered inorganic-organic solids, with organic functionalities directly bonded to the inorganic sheets via the Si-C bond, were prepared by a template sol-gel synthesis under soft conditions (room temperature) using octyltriethoxysilane as the silica source, aluminum acetylacetonate as the alumina source, magnesium nitrate and sodium hydroxide. These hybrid materials belong to the 2:1 trioctahedral phyllosilicates family with inorganic compositions close to saponite. The ratio of Al (x) could be varied between 0 and 0.33. The x-ray diffraction patterns agree with a layers structure (presence of the (00l) peak series and the (060) peak). The high d001 spacing values (2.4-2.6 nm) can be related to the octyl chains present in the interlayer space. DRIFT and 13C NMR spectra indicate that the Si-C bonds are intact and siloxanes are fully hydrolyzed giving SiOAl and SiOMg bonds. 27Al and 29Si NMR were carried out in order to determine the repartition of the different elements in the layer: Al substitutes for Si in the tetrahedral layer and for Mg in the octahedral one. These results were determined by elemental analysis. The DTA-TG results show that the organic matter start to decompose in air above 250°C but its complete removal needs temperatures higher then 800°C. The aspect of the materials depends on the value of x; it varies from greasy, waxy, waxy powdery and finally powdery. The hydrophilicity of the solids depends strongly on the aluminum content.
Metallic Nanoparticles from Single Polyelectrolyte Molecules
Authors: Gorodyska Ganna , Kiriy Anton , Minko Sergiy , Stamm Manfred
Published: February 2017

Here we report on the metallization of poly(2-vinylpyridine) (P2VP) by coordination with palladium acetate (PA) followed by reduction with dimethylamine borane (DAB) to metallic palladium. The morphology of the resulting products deposited on a flat surface was analyzed with AFM. If P2VP, PA and DAB are mixed together, the Pd clusters up to 30 nm in diameter are obtained. A two step synthetic procedure was examined. The initially prepared complex P2VPH-1/2(PdCl4) was deposited on Si-wafer and then reduced, leading to the Pd clusters with a narrow size distribution (3 nm height by 100 nm length). Alternately, a step-by-step procedure was used wherein P2VP single molecules were deposited on Si wafers from very dilute acidic aqueous solutions then placed in PA solution and finally reduced with DAB, resulting in the 1.5-5 nm in the diameter wire-shaped Pd nanoparticles with the length of about 350 nm.
Microstructural Evolution and Order-Disorder Transitions in Mesoporous Silica Films Studied by FTIR Spectroscopy
Authors: Innocenzi Plinio , Falcaro Paolo , Grosso David , Babonneau Florence
Published: February 2017

Silica mesoporous thin films have been synthesised with a self-assembling process employing cetyltrimethylammonium bromide as the organic template and tetraethyl orthosilicate as the silica source. Mesoporous films with Pm3n cubic phase phases have been obtained and the films have been thermally treated in air with a progressive heating schedule from asdeposited up to 1000°C. The evolution of the microstructure has been studied with transmission Fourier transformed infrared (FTIR) spectroscopy.

FTIR spectra of the as-deposited films have shown the presence of cyclic species, which at temperatures larger than 350°C have been no more observed. In the 1000-1300 cm-1 region several overlapped absorption bands have been detected. In particular, the pair LO3-TO3, the cyclic species absorption bands and the pair LO4-TO4 have been resolved. These last bands, in particular, are associated with disorder-order transitions in the silica microstructure. These disorder-induced optical modes are due to the large interface area and related to bond strains.

The evolution of the bands in the 1000-1300 cm-1 region has been followed with the Berreman configuration, performing the transmission FTIR analysis at 45° with respect to the normal incidence angle. The LO3 band, which in silica sol-gel films is indicative of the network condensation and is activated by scattering of the light in the pores, was resolved as a single sharp band from 250°C.
Fundamental Property of the Solid Equation of State Infered from Shock Waves Physics
Authors: Chaissé Francis , Heuzé Olivier
Published: February 2017

In this study, the linear shock velocity (U) versus particle velocity (u), which is well suited for describing the Hugoniot curve of metals, is revisited from a thermodynamical point of view. In this way, it is possible to set-up a theoretical relation between the Grüneisen coefficient and the isentrope derivatives to third order at the initial state before jump, ensuring the linear U(u) relationship. When applied to the classical Morse potential describing the Equation of State (EoS) in the Mie-Grüneisen form, the theoretical result is in a good acceptance with the shock experimental results carried out on copper.
Numerical Simulations of Microstructural Evolution of Lamellar Alloys: Applications to Pb-Sn Solder
Authors: El-Khozondar Rifa J. , Solomatov Vitcheslav S. , Tikare Veena
Published: February 2017

Understanding the morphological changes of Pb-Sn solder alloys helps to improve their performance in electronic applications. The focus of our study is degeneration of lamellar structures at high temperatures. Microstructural evolution of the Pb-Sn eutectic lamellar structure is modeled numerically using Monte Carlo Potts approach. The initial structure consists of alternating layers of Pb-rich and Sn-rich phases, simulating the lamellar array in a near eutectic system. Faults are introduced to destabilize the system. After a short incubation period the shape of lamellae become irregular. The perturbations grow with time and eventually break the lamellae into nearly equiaxed grains. The grain size of the degenerated structure is 2-3 times the original lamellar spacing weakly depending on the spacing between the faults. This is consistent with the experimental observation of degeneration of Pb-62 wt% Sn solder. The duration of degeneration processes is comparable with the time it would take Ostwald ripening to produce grains of the same size. Eventually grain growth reaches the asymptotic regime of coarsening described by a power-law function of time.
Modeling And Photoabsorption Study of YPd2-xRhxB2C Superconductors
Authors: Hsu L.-S. , Wang Y. K. , Guo G. Y. , Huang Y.-J. , Lan M.-D.
Published: February 2017

The electronic structures of six polycrystalline borocarbide superconductors YPd5-xRhxB3C0.4 (x=0, 0.05, 0.1, 0.15, 0.2, and 0.25) were studied by photoemission and photoabsorption spectroscopies and theoretical calculations. The valence-band (VB) photoemission spectrum is compared with the theoretical total and partial density-of-states (DOS) curves. The Pd L3-edge x-ray absorption near edge spectra (XANES) are compared with the calculated XANES spectra for these intermetallic compounds. The decrease of the superconducting transition temperatures (Tc) with addition of Rh dopant in these compounds is due to a decrease of the total DOS at the Fermi level (EF).
Gambaran Penerimaan Diri (Self-Acceptance) pada Orang yang Mengalami Skizofrenia
Authors: Gamayanti Witrin
Published: January 2017

In general, people with schizophrenia have damaged reality testing which make them disconnected from their social environment. Despite being entered in the residual phase, it is still reluctant to interact with other people and have not productive yet in utilizing his/her capabilities. But the researchers also saw some people with residual schizophrenic who able to be productive as well as socialization; it associated with their acceptance to his/her self and its disorders. This study intended to figure out the image of self-acceptance of people with residual schizophrenia while they suffered with a large of pressures. This study used a qualitative method with case study design. The subjects of research were the people with residual schizophrenia with age range of 20 to 40 years old. From the research, it was found that the people with residual schizophrenia that can be productive and actively involved in social environment effected by the acceptance of him/herself although the self-acceptance quality was different among subjects
TEKNIK PENANGKAPAN IKAN DENGAN ALAT REBO DI SUNGAI KOMERING BAGIAN HILIR SUMATERA SELATAN
Authors: Burnawi Burnawi
Published: February 2017

Abstrak bisa dilihat di Lampiran
JENIS-JENIS ORGANISME DASAR (Benthos) DI PERAIRAN SUNGAI MUSI SUMATERA SELATAN
Authors: Bahri Syamsul
Published: February 2017

Abstrak bisa dilihat di Lampiran
Analysis of the Juvenile Idiopathic Arthritis Immunization Schedule
Authors: Namazova-Baranova L. S. , Valieva S. I. , Fedoseenko M. V. , Novikova D. A. , Tkachenko N. E. , Gaivoronskaya A. G. , Broeva M. I. , Kaljuzhnaya T. A. , Shakhtakhtinskaya F. Ch. , Alekseeva E. I. , Isaeva K. B.
Published: January 2017

Background:The connection between vaccination and autoimmune diseases (and rheumatic pathology in particular) is still a subject of discussions. When discussing the possibility of vaccinating rheumatic patients we should take into account the ultra high dangers that infectious diseases pose for such patients, including those that can be prevented by vaccination. We should also take into account the experience of using various vaccine types in rheumatic patients, which illustrates of their high safety profile.

Objective:Our aim was to study the immunization schedule in children with juvenile idiopathic arthritis.

Methods:The evaluation of vaccine history and other anamnestic data in juvenile idiopathic arthritis patients was based on individual medical records (individual child’s card/preventive vaccination certificate), as well as questionnaires filled by mothers.

Results:It has been determined that a significant proportion of children with vaccination schedule deviations are juvenile idiopathic arthritis patients. Almost one in four children with a confirmed rheumatic diagnosis has not been immunized against the major vaccine-preventable diseases. In one non-vaccinated group, there was a case of juvenile arthritis onset after recovering from measles. A small number of patient mothers connects the manifestation of rheumatic diseases with vaccination.

Conclusion:Violations of vaccination status in JIA patients require corrections according to the results of clinical studies and the recommendations of international experts.
Treating Systemic Juvenile Idiopathic Arthritis with Tocilizumab: Clinical Case
Authors: Alekseeva E. I. , Valieva S. I. , Bzarova T. M. , Denisova R. V. , Sleptsova T. V. , Lomakina O. L. , Chomakhidze A. M.
Published: January 2017

This article describes a case of successfully used tocilizumab (interleukin 6 receptors monoclonal antibodies) in a two-year patient with severe systemic juvenile idiopathic arthritis resistant to oral and parenteral glucocorticoids, nonsteroidal anti-inflammatory drugs, and methotrexate. Just after the first injection of tocilizumab, fever and pain ceased, morning stiffness decreased significantly; laboratory disease activity indices normalized by the 4th week of drug use; by the 16th week inflammatory changes in the joints regressed completely, the disease entered its inactive phase. After using tocilizumab, remission duration was 20 months for articular syndrome and systemic manifestations. No adverse reactions have been registered.
Processo grupal em enfermagem: possibilidades e limites
Authors: Munari Denize Bouttelet
Published: February 2017

Este trabalho descreve nossa trajetória de estudo e reflexão sobre a utilização de grupos na assistência. Através de uma perspectiva qualitativa buscamos identificar, na percepção dos entrevistados, aspectos que os motivam para essa atividade, suas fontes de aprendizagem e os pontos relevantes da sua experiência concreta com grupos. Verificamos que os enfermeiros reconhecem o valor terapêutico desse trabalho provendo-lhe condições físicas e estruturais adequadas. No entanto, observamos que um dos fatores limitantes no desenvolvimento dessa atividade é a dificuldade no manejo de situações grupais que revelam os meandros do sentimento humano, indicando que o enfermeiro coordenador de grupo necessita, além de recursos teóricos, exercitar o seu autoconhecimento para prover um ambiente e relacionamento grupal, capazes de otimizar o valor terapêutico dessa atividade.
A prática de enfermagem psiquiátrica em uma instituição pública no brasil
Authors: Lima Lívia Vaz de , Amorim Wellington Mendonça de
Published: February 2017

Trata-se de um estudo histórico-social, cujosobjetivos foram identificar as características da prática da enfermagem psiquiátrica sob a ótica dos profissionais de enfermagem que atuaram em uma Instituição Psiquiátrica Pública do Rio de Janeiro durante a Reforma Psiquiátrica, e analisar as mudanças na prática da enfermagem no processo da Reforma Psiquiátrica, sob a ótica dos profissionais que atuaram nesta instituição. Utilizamos como fontes os depoimentos orais dos profissionais de enfermagem. Os achados mostraram que, durante a reforma psiquiátrica, a assistência da enfermagem manteve características segregadoras concernentes ao modelo asilar, e que as mudanças se deram pela influência de novas rotinas e de cursos de capacitação dos profissionais de enfermagem.
A dor da criança e do adolescente com câncer: dimensões de seu cuidar
Authors: Menossi Maria José , Lima Regina Aparecida Garcia de
Published: February 2017

Enfocando a dor da criança/adolescente com câncer como um fenômeno complexo, este estudo tem por objetivo descrever as experiências dos profissionais de saúde envolvidos no cuidado dessa clientela nas hospitalizações e analisá-las, buscando fundamentação nas idéias acerca da complexidade de Edgar Morin. Os dados empíricos foram coletados mediante entrevistas, permitindo vislumbrar possibilidades, como a composição de equipes fixas integradas e o envolvimento da família no cuidado. Evidencia-se a necessidade de distinguir os múltiplos enfoques dos profissionais e compor uma unidade de cuidado em que esses enfoques sejam articulados através de um projeto comum, para atender ao cuidado das múltiplas dimensões da dor desses pacientes.
Influência da dor crônica na capacidade funcional de idosos institucionalizados
Authors: Reis Luciana Araújo , Torres Gilson de Vasconcelos
Published: February 2017

Este estudo teve por objetivo analisar a influência da dor quanto à duração, localização e intensidade na capacidade funcional de idosos institucionalizados. Trata-se de um estudo tansversal a partir de uma amostra de 60 idosos. O instrumento foi composto por variáveis sociodemográficas, de saúde, escala numérica de dor e Índice de Barthel. Com a aplicação do Teste Qui-quadrado verificou-se diferença estatística significante entre presença de dor e as atividades: banho (p=0,015) vestir-se (p=0,041), transferência para higiene intima (p=0,001), transferência cama e cadeira (p=0,032), deambulação (p=0,010) e subir escadas (p=0,008) e a pontuação do Índice de Barthel e presença de dor, p<0,000. Diante dos resultados deste estudo constatou-se que a dor interfere de maneira negativa na capacidade funcional dos idosos.
Suicide attempts by exogenous intoxication among female adolescents treated at a reference hospital in the city of Recife-PE, Brazil
Authors: Veras Juliana Lourenço de Araújo , Katz Cintia Regina Tornisiello
Published: February 2017

This study aimed to assess cases of self-inflicted poisoning among adolescents reported by the Toxicological Care Center of a reference hospital in Recife-PE, Brazil. The data were collected between March and May 2010 from hospital charts and structured interviews with the participants and parents/guardians. Among the 25 cases of attempted suicide registered in the period, 21 were female adolescents, who made up the sample of the present study. The adolescents were between 13 and 19 years of age. Pesticides were the most frequent toxic agent used (61.9%). The results of the present study underscore the importance of studying suicide in this population, with a focus on family relations, in order to lay the foundation for the development of prevention and treatment programs for this vulnerable group.
Conflitos por águas e alocação negociada: o caso do vale dos Carás no Ceará
Authors: Pinheiro Maria Inês Teixeira , Campos José Nilson B. , Studart Ticiana M. de Carvalho
Published: February 2017

O artigo apresenta a descrição de um conflito de águas no estado do Ceará, envolvendo as águas perenizadas pelos reservatórios Thomas Osterne e Manoel Balbino, no vale do rio Carás, na bacia do rio Salgado, ao sul do estado. Ao longo dos anos, em períodos de pluviosidade normal, foram construídas pequenas barragens para captação das águas liberadas nos leitos dos riachos. Em épocas de escassez, o conflito instala-se no vale, em decorrência da retenção de águas a montante, que impedem o fluxo natural para os usuários a jusante. O artigo apresenta ainda a descrição do conflito e sua análise no contexto do modelo institucional do Ceará. É analisada também a prática da alocação negociada como estratégia de resolução de conflitos. Como resultado, conseguiu-se, pacificamente, a remoção de barragens de terra que interferiam no escoamento do trecho perenizado.
Opinião dos alunos quanto ao ensino dos diagnósticos de enfermagem segundo a taxonomia da NANDA
Authors: Lopes Maria Helena Baena de Moraes , Vale Ianê Nogueira do , Barbosa Margarida
Published: February 2017

Acreditando na importância do diagnóstico de enfermagem,o seu ensino foi introduzido ha 4 anos nas disciplinas de Assistência de Enfermagem à Saúde da mulher e Enfermagem Perinatal, no 6o. período do curso de graduação em enfermagem da UNICAMP. Com o intuito de avaliar essa experiência, propusémo-nos a levantar a opinião dos alunos e obter subsídios para aprimorar o ensino. Foram ministradas 4 horas de ensino teórico e indicada bibliografia básica. A aplicação prática supervisionada foi desenvolvida durante 21 horas numa unidade neonatal e 45 horas em centros de saúde. Ao término das disciplinas, 16 alunos responderam a um questionário com questões fechadas e abertas. O grupo de alunos respondentes foi unânime em considerar válido o estudo dos diagnósticos de enfermagem. A maioria considerou mais adequado introduzir o ensino no 3o. semestre, quando se iniciam os procedimentos básicos de enfermagem. Quanto à dificuldade de aprendizado do uso dos diagnósticos, 68, 7% dos alunos relataram um nível de dificuldade superior a 25% e inferior a 75%. O grupo de alunos como um todo achou que o estudo do diagnóstico de enfermagem trouxe modificações no seu conceito de assistência de enfermagem.
O ensino de custos nas escolas de graduação em enfermagem
Authors: Francisco Ivone Maria Fonseca , Castilho Valéria
Published: February 2017

Trata-se de um estudo que teve como objetivo principal analisar a inserção de conteúdos relativos a Custos na disciplina Administração Aplicada à Enfermagem das Escolas de Graduação em Enfermagem do Estado de São Paulo. A amostra foi composta por 28 docentes.O estudo foi do tipo descritivo, exploratório, correlacional com abordagem quantitativa. Os resultados permitiram constatar que 19 (67,86%) docentes ministram esse tema na graduação, não havendo correlação ou associação estatisticamente significativa entre o ensino do Tema Custos, o número de pós-graduções do docente e o tipo de instituição em que o docente trabalha (Pública ou Privada).
Sexuality in the puerperium: the experience of a group of women
Authors: Salim Natália Rejane , Gualda Dulce Maria Rosa
Published: February 2017

Puerperium is a period of great changes in women's lives, in physiological, psychological and socio-cultural terms. Female sexuality is a broad topic that should be explored vis-à-vis the singularity of woman's experiences which themselves vary at different moments in time. This article is part of the project: Sexuality in the Puerperium, the objective of which was to understand what women's experience of their sexuality is in the postpartum period. Observation and semi-structured interview were used. The research approach was qualitative and narrative was used as the conceptual and methodological method. Six primiparas who gave birth in a public hospital in São Paulo took part in the study. Observation took place in the in-patients unit in the immediate post-partum period. The interviews were conducted in the women´s homes. The results of the study have enabled an understanding to be formed of the meanings and changes in sexuality during the postpartum period as well as of the experiences every woman faces in her new roles, relationships and difficulties.
Perfil acadêmico dos professores de bioética nos cursos de pós-graduação no Brasil
Authors: Figueiredo Antonio Macena de
Published: February 2017

Este trabalho apresenta a síntese dos resultados de uma pesquisa documental sobre o ensino de Bioética na pós-graduação da área da saúde. Seu objetivo principal é caracterizar o perfil acadêmico dos professores desse curso. Para tanto, foi mapeado o perfil acadêmico de professores das disciplinas relacionadas com a Bioética de 163 cursos reconhecidos pela CAPES. Por meio da identificação dos docentes nos programas das disciplinas, efetuou-se uma pesquisa nos currículos disponíveis na Plataforma Lattes do CNPq. Devido à ausência de registros e tendo-se excluído aqueles que aparecem mais de uma vez em outras disciplinas, só foi possível analisar os currículos de 96 professores. Desses, 58 (60,4%) eram do sexo masculino, sendo 45 (46,9%) da área médica; 51 (53,1%) de outras 12 áreas acadêmicas; 36 (37,5%) têm duas ou mais pós-graduações; 2 (2,08%) são graduados em Filosofia; 1 (1,04%) em Linguística; 83 (86,47%) dos currículos não registram formação específica em cursos lato ou stricto sensu em Filosofia, Ética e Bioética; 16 (n = 16,7%) integram Comitês de Ética e em apenas 5 (5,2%) constam que já participaram desse tipo de comitê. O estudo evidenciou que o maior desafio é vencer a carência de profissionais qualificados para o ensino da Bioética em pós-graduação no País.