bluuebunny/crossref_metadata_2025 huggingface dataset:
Behavior and Design Recommendations of Splice Connection in Weak-Axis Column-Tree Steel Moment Frames
Authors: Lee Kang Min , Chen Liu Yi , Yang Yang , Oh Keun Yeong , Hong Sung Bin
Published: September 2014

The main objectives of this paper was to investigate the cyclic performance of splice connection in weak-axis column-tree connections with the formation of plastic hinge assumed at splice connection and provide some design recommendations. By reducing the cross-sectional area of the splice plates, the splice connection in this test are designed as a weaken component to utilize the ductility capacity and energy dissipation. The results showed that it could develop the plastic rotation capacity in the beam splice connection and portion in the link beam but not increase the energy dissipation capacity during the same story drift ratio.
Aeroelastic Vibration of Super-Tall Buildings
Authors: Kim Yong Chul , Yoon Sung Won
Published: September 2014

Aeroelastic wind tunnel tests were conducted on conventional and tapered super-tall buildings to investigate the effect of the taper on the aeroelastic behavior for various wind directions and normalized velocities, with a focus on the maximum tip displacement. The natural frequencies and damping ratios were adjusted by means of the spring stiffness and magnetic field at the bottom of the test models. The displacements at the bottom of the test models were measured and transformed to tip displacements. The results showed that the taper suppressed the maximum tip displacement in both the X and Y directions, although the suppression was greater in the Y direction, especially for small wind directions. Moreover, the variations of the maximum tip displacement in the X direction with the wind direction and normalized velocity were small.
Effect of Loading Frequency on Fatigue Life of Extended Hollobolt in Concrete Filled Hollow Section
Authors: Abd Rahman Norashidah , Tizani Walid
Published: September 2014

A difference in frequency of loading during the test may give a different number of cycles to failure, especially at a higher frequency. The difference becomes more evident when higher frequency was applied at the same stress value. The change of frequency should be analyzed to define its effect on the fatigue life of the Extended Hollobolt to concrete filled hollow section. A number of tests are conducted to determine this effect. Frequencies between 0.25 and 5.0 Hz were applied. Analysis of the result indicates that frequency below 3 Hz does not significantly affect the fatigue life of Extended Hollobolt.
The Performance of a Vertical Well Subject to Edge Water Drive
Authors: Eiroboyi I. , Obeta P.O.
Published: September 2014

The economics and productivity of any reservoir is strongly connected to the ultimate recovery of the reservoir, this is chiefly govern by the strength or performance of that reservoir. In order to be able to understand the ability of the formation to produce fluid and characterize the reservoir properly, well testing is use to carry out this analysis.
Effects of Fibres on Improvement the Cracking in Concrete Slabs
Authors: Dautaj Arton , Kabashi Naser , Krasniqi Cene , Ahmeti Patriot
Published: September 2014

The behaviour of concrete elements under loads, hydrated process and several conditions is one of the actually problems on improvement of structures or elements of structures. In this paper we analyze the problem of cracking, such a result of loading and hardening process of concrete. One of the way for improvement is using the polypropylene fibres , and creating the composite materials In this case of studies we used experimental examinations of concrete slab, such a model, for - slab (referent model) - slab with different percent of fibres The most of comparing results are on comparing the effect of fibres in improvement of energy capacity of concrete elements, and following the crack situation, or decreasing the dimensions of cracks. One of the most important value based on the behavior of the structure is ductility. The ductility is a structural design requirement in most design codes. The traditional definition of ductility cannot be applied to composite structures, but will be analyzed on the increasing the dissipations of energy. Several methods are used on the analyzing of this problem and propose to calculate the absorption the energy in concrete slab and to analyze the positions of cracks.
Fuzzy Yield Index for Optimal Tool Replacement Policy
Authors: Liao Mou Yuan , Wu Chien Wei , Zhang Fang Yu
Published: September 2014

Determining the best tool replacement time is important for minimizing overall manufacturing costs. Utilizing the yield index, the true process yield for dynamic processes with tool wear can be estimated, and the tool wear problem can be controlled. However, no measurement is free from error or uncertainty, a realistic approach is to assume that observed data contain a degree of imprecision. Thus, this study applies the fuzzy theory to the tool wear control problem. A decision rule is proposed to determine the appropriate time to replace a tool.
Research on Health Status and the Human Factors and Environmental Parameters of Special Equipment Maintenance Decision
Authors: Du En Xiang , Wang Wei , Niu Wen Qiang , Ren Jing Jing
Published: September 2014

Aiming at the problems of special equipment which maintain much maintenance factors and difficult to decide, this article designs condition based maintenance total project. Then, by analyzing maintenance decision condition attribution and decision attribution, the model of maintenance decision based on decision tables in rough set theory is established.
A Molecular Dynamics Study of Fe Adatom Diffusion on Different Sized Fe Nanoparticles
Authors: Dong Chen
Published: September 2014

The diffusion behaviors of Fe adatom on Fe nanoparticles with three different sizes have been explored by molecular dynamics (MD) simulation. The activation energies and pre-exponential factors are extracted from the Arrhenius relation. The MD simulation shows that the hopping, exchange and direct/indirect crossing mechanisms contribute to the diffusion of Fe adatom on Fe nanoparticles and the diffusion behaviors do not show a significant nanosize effect.
Analysis of Soil Liquefied and Damage Phenomenon at Home and Abroad
Authors: Li Zhao Yan , Guan Yu
Published: September 2014

Saturated soil liquefaction of macroscopic signs are surface sand boil, ground pavement cracks, landslides, farmland covered by sand, foundation is not uniform settlement led to the building sink and even cause damage to buildings and other instability. The phenomenon of soil liquefaction damage occurred many times at home and abroad in the earthquake history. By the research of the future, this paper combs the domestic and foreign typical seismic liquefaction phenomenon and refining mechanism of soil liquefaction.
Durability Evaluation and Prediction of Service Life for Cement-Based Grouting Materials
Authors: Tu Peng , Hu Yu Ling , Zhang Guo Xiang
Published: September 2014

The accumulated CaO consumption rate of 25% in grouting concretion stone is considered as the termination of durability life in the paper. Influence factors on the service life of grouting cement stone are studied and the variation laws on the service life, strength and pH value are revealed. The acceptance criteria of durability evaluation are proposed. The practical methods for durability evaluation are established based on the pH value of caustic solution including the expression of service life prediction model, and classification principles of durability evaluation. The calculation process is illustrated by examples. The method provides references for the durability evaluation of grouting concretion stone under the common atmosphere.
The Application of “5W1H” in Industrial Design
Authors: Su Xiao
Published: September 2014

Different people have different opinions toward industrial design based on different perspectives and be lacking in some integral method to guide. It proposed the method of “5W1H” to be applied to understand design and structured the model of “5W1H” in industrial design. And then it discussed the contents and requirements of “5W1H” in design combining the product design. The research results showed that the way of applying the method of “5W1H” to understand design offers an integral perspective and which is feasible. In the end, it pointed out that “5W1H” in industrial design can be regarded as a behavior to understand the design works as well as a strategy to guide the specific design practice.
Sensitivity of Panicle Related Quantitative Characteristics of Rice DUS Test to Environmental Changes
Authors: Liu Yan Fang , Wang Jiang Min , Huang Qing Mei , Zhang Jian Hua , Yang Xiao Hong , Zhang Hui , Zhang Peng , Guan Jun Jiao
Published: September 2014

Panicle related characteristics of rice have close relationship with rice yield. Among the 48 panicle related characteristics of rice DUS test, 8 quantitative characteristics were used to research whether environmental changes had impact on their expression. Results showed that, (1) in general, measurements of the 8 characteristics of the same variety in different environments were visibly different, and when measurements were translated into “notes” according to “DUS Test Guideline of Rice”, such difference could be narrowed, indicating the 8 characteristics were sensitive to environmental changes, while corresponding expression states and “notes” could weaken such influence; (2) from the results of SPSS statistic analysis, environment factor were less influential than variety factor to the 8 characteristics; (3) compared with previous research, the 8 panicle related quantitative characteristics were less affected by environmental changes than quantitative characteristics of vegetative growing period; (4) “notes” difference of the same variety in different environments were correlated with significance analysis of environment impact on characteristic expression, revealing the potential of statistic analysis in checking the availability of results of DUS tests gained from different test locations. To reduce the impact of environmental changes to characteristic expression, suggestion of fixing the DUS test of the same plant genus and species in one appointed station was also made in this study.
Preparation and Properties of Capric-Lauric-Palmitic Acid Eutectic Mixtures/Expanded Graphite Composite as Phase Change Materials for Energy Storage
Authors: Huang Xue , Cui Yling De , Zhang Bu Ning , Yin Guo Qiang , Feng Guang Zhu
Published: September 2014

This work is focused on the preparation and properties of ternary fatty acid eutectic mixtures/ expanded graphite form-stable phase change materials (PCMs). Based on the theoretical calculation of the mass ratio and ternary eutectic melting temperature, the ternary eutectic mixture of capric acid (CA), lauric acid (LA) and palmitic acid (PA) was prepared firstly, which is for the sake of decreasing the phase transformation temperature. Thermal characteristics such as melting temperature and latent heat of fusion of these developed eutectics measured by using Differential Scanning Calorimetry (DSC) technique, which also showed that the eutectic mixture was composed by CA, LA and PA in the mass ratio of 59.7:30.1:10.02. Then the CA–LA–PA was absorbed in expanded graphite (EG), which acts as a supporting material, the optimum mass ratio of CA–LA–PA to EG is 17:1. The CA–LA–PA/EG composites were characterized by the scanning electronic microscope (SEM), differential scanning calorimeter (DSC). The SEM observations showed that the CA–LA–PA was adsorbed into the porous structure of EG, instead of any chemical action. The DSC results indicated that the phase change temperature and latent heat of the CA–LA–PA and CA–LA–PA/EG were 19.92 °Cand 19.48 °C, and 135.49 J/g and 130.73 J/g respectively. The thermal conductivity of CA–LA–PA /EG composite PCM was improved by the high thermal conductivity of the EG. Thermal cycling test showed that the CA–LA–PA/EG composite had a good thermal reliability. All results indicated that CA–LA–PA/EG composite PCM has a proper melting temperature and latent heat for building energy conservation.
Corrective Solutions for the Shaft with Flange Used for Fixing the Blade on a 5 kW Wind Turbine to Withstand Extreme Weather Conditions
Authors: Bădărău Rodica , Miloş Teodor , Bordeasu Ilare , Bej Adrian
Published: September 2014

The paper presents a case study on the original solution of a flange shaft as part of the root area of a 5 kW wind turbine blade. There were analyzed the causes that led to the shaft breakage under wind loadings in extreme weather conditions, and consequently technical solutions have been searched in order to improve the shaft design making it more reliable as mechanical strength at extreme wind loadings. The flange shaft is a welded subassembly that keeps the blades attached to the rotor hub. The first part of the paper consists in an analysis referring the loading status, the materials used for blade manufacturing, the identification of critical areas where the breaking was initiated and also the causes for which the materials assumed and specified in the technical design and manufacturing technology failed under loading at wind gusts of about 30 m/sec. Based on this preliminary analysis, the second part of the paper presents the technical solutions which were considered in reference to the materials and the improved design concept aiming to provide the right mechanical strength necessary to withstand specific wind loadings in extreme weather conditions.
Application of Numerical Simulations at Welding Multilayer Welds from the Material X22CrMoV12-2
Authors: Moravec Jaromír , Slováček Marek
Published: September 2014

Heat-resisting martensitic steel X22CrMoV12-1 is suitable to be used particularly for steam turbine components (e.g. blades or action wheels of steam turbines) and as parts of airplanes structural devices. The aim of this paper is to show how numerical simulations can help to optimize welding procedure of this very hardly weldable material. On the real multilayer weld will be described how to arrange whole experiment in order to obtain not only relevant input data but also verification data. As a result it will be possible to set up the computational model for this type of steel and consequently to use it for simulation computations of welding and heat treatment of real structure components.
Tenacity Evaluation of the Deposited Metals by Welding, Using 3Si-2 Wire of ø1.2 mm on S355J4 Steel
Authors: Pascu Romulus , Duma Iuliana , Dascău Horia
Published: September 2014

The mechanical tenacity characterizes the materials behaviour to static and dynamic shocks, at the ambient and the negative temperatures. In the case of deposited metals by welding, the tenacity characterization is made by determining the impact energy, (KV), the crack back contraction, (CBC), the lateral expansion (EL), and the correlation between these characteristics.
Methodology for Reparation of Damaged Sleeves and Welded Shield Sections of Guide Vanes at Hydropower Plant DJERDAP 1
Authors: Arsić Miodrag , Vistać Brane , Bošnjak Srđan M. , Grabulov Vencislav , Savić Zoran
Published: September 2014

Normal 0 false false false MicrosoftInternetExplorer4 Vertical Kaplan turbines, manufactured in Russia and with nominal power of 200 MW, have been installed in 6 hydroelectric generating units at ’Djerdap 1’. During the refurbishment of hydropower plant experimental non-destructive tests were performed in order to determine the state of turbine components. During the course of testing damage was detected at sleeves and welded shields of guide vanes, which occurred as a consequence of turbine shaft vibrations. 1782 mm long guide vane sleeves were made of cast steel 25L (GOST standard), 260 mm long sleeve was made of forged steel St 25 (GOST standard), while welded shields of guide vanes were made of austenitic steel 08X18H10T (GOST standard). Results of experimental tests and methodology for reparation of damaged surfaces of sleeves and welded shields of guide vanes are presented in this paper. It was necessary, due to the structural solution used for the design of guide vanes and their function during service, to define a large number of details, carefully reconsider them and carry out all activities with extreme care in order to enable the safe operation and continuous use of vanes through the use of reparation methodology for welding/surface welding of sleeves and welded shields. Overlooking, underestimation or incorrect perception of important details could cause significant problems during turbine operation. /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}
Development of a New Generation of Welding Simulators for Education and Training
Authors: Engh Erik
Published: September 2014

During the years a number of different simulators have been developed for the welding community. These simulators have been targeted to different user groups and different technical level of the group itself. The technological quality has mostly been on a professional level, although the user friendliness, we must admit, may have a wide interpretation of the word “friendliness”. The use of mobile devices, pads and so forth, with other interface methods than the keyboard, that has appeared over the last years have given us new opportunities to define user interfaces that are completely different from what was possible before. This paper will discuss a work in progress for a simulation project development related to education and training, in two different projects, IWSD (Leonardo da Vinci project) and Green Weld (EEA Grant project), currently running in Romania and in Bulgaria.
Seismic Strength of Reinforced Multi-Storey Masonry Walls
Authors: Como Mario
Published: September 2014

Analysis of force transmission through the various structural components is needed to the full understanding of the seismic behavior of masonry buildings. It is in fact necessary to identify the weak links of the chain and define the essential reinforcements to insert in the structure. In this context the Paper analyzes the strengths of masonry walls under the action of out of plane and in plane horizontal forces and compares the systems of reinforcement of the walls that can use steel or Fiber Reinforced Polymers (FRP).
Mortar Joints Influence in Debonding of Masonry Element Strengthened with FRP
Authors: Freddi Francesco , Sacco Elio
Published: September 2014

The effects of mortars joints in masonry substrate reinforced with FRP is investigated from the numerical point of view. The analysis has been conducted by means of a new interface model specifically developed to reproduce the debonding process occurring between an elastic thin body in adhesion with a cohesive support material, as concrete or masonry. The model accounts for mode I and mode II of failure, considering the effect of the in-plane deformation of the interface, i.e. the possible elongation or confinement of the material constituting the interface. Numerical results are compared with experimental evidences showing the good performances of the proposed model in investigating the transferring phenomena in heterogeneous interfaces and, in particular, in studying the influence of the presence of mortar joints in the masonry texture in the debonding process.
Numerical Investigation on the Residual Behaviour of Masonry Walls Damaged by Fire Exposure
Authors: Russo Salvatore , Sciarretta Francesca
Published: September 2014

The paper proposes a numerical approach to the problem of residual mechanical performance of load-bearing fire-separating masonry walls, via FE modelling. The mechanical features of the model are oriented to capture the cracking behaviour under both thermal and mechanical stress; by doing so, the liability of numerical outcomes could be assessed by comparison to experimental information already obtained. The numerical analysis is performed by means of FEM analysis with DIANA 9.4.4 software, simulating the experimental heating cycle followed by a mechanical ‘cold’ compressive failure test. The comparison of numerical outcomes to available experimental information allows to judge the good reliability of the numerical approach in reproducing the residual behaviour of a masonry wall after fire exposure; this would especially address the issues of physical modelling and the difficulties of relating the behaviour of small samples to real-size walls.
Surface Treatments for Historical Constructions Using Nanotechnology
Authors: Colonna Martino , Gentilini Cristina , Praticò Francesca , Ubertini Francesco
Published: September 2014

The present study aims at providing an overview regarding the level of knowledge and experience gained about nanomodified surface treatments in the context of historical buildings and monuments. Nowadays, nanotechnology offers a variety of interesting cues for research, having a potential impact on every domain of science and technology. In particular, with regard to the area of surface treatments and their use in the field of historic buildings preservation, evolutionary changes may be expected. Optimized tailor-made materials and films, with previously non-achievable properties, can now be produced due to the gained ability in creation, manipulation, modeling and characterization of nanostructured systems. However, health and environmental protection issues should be considered.
Strengthening Brick Masonry by Repointing – An Experimental Study
Authors: Gams Matija , Tomaževič Miha , Kwiecień Arkadiusz
Published: September 2014

The results of an experimental study aimed at seismic strengthening of brick masonry walls by the use of repointing and reinforcing bed joints are presented. Within the testing campaign eight walls were tested by cyclic shear. Two of the walls were used as control walls, whereas the other six walls were strengthened. Two kinds of mortar were used for repointing and steel and GFRP materials were used for reinforcement. In case of one wall, reinforcement was laid into a flexible polymer in order to distribute the stresses in the steel bar to a larger area. The tests indicate that repointing can be a very successful strengthening technique. Best results were obtained in case of repointing by mortar with low elastic modulus and steel reinforcement.
Enhancing the Seismic Resistance of Columns by GFRP Confinement Using Flexible Adhesive-Experimental Study
Authors: Lasowicz Natalia , Kwiecień Arkadiusz , Jankowski Robert
Published: September 2014

In this paper, the results of two experiments, focused on testing the effectiveness of a method of enhancing the seismic (dynamic) resistance of masonry columns with the use of flexible polymer adhesive, are shown. The first experiment was devoted to investigate the damping properties of a polymer working between two stiff layers, whereas the aim of the second one was to verify if the identified damping properties of the polymer can improve the dynamic behaviour of short masonry columns (prisms) strengthened by confinement made of GFRP grid bonded by the polymer adhesive. The results of the first stage of experimental investigation indicate that bonding two stiff elements with the analyzed polymer adhesive leads to the significant increase in overall damping properties. The results of the second experiment show that the GFRP grid confinement with flexible polymer adhesive is more effective than stiff epoxy and mineral adhesives.
Debonding Limit of the Externally Glued FRP Reinforcements Applied on Clay Brick Substrate: Statistical Assessment of a Design Formula
Authors: Carrara Pietro , Freddi Francesco
Published: September 2014

The present contribution aims to statistically assess a design procedure to estimate the bond resistance of composite fabrics externally glued on clay brick masonry substrates. Based on recent experimental campaigns a database of bond test results between fiber reinforced polymer and clay bricks is collected and an alternative formula is proposed starting from theoretical and experimental evidence. Then, its characteristic value is evaluated following the "Design Assisted by Testing Approach" suggested in the Eurocode 0. The capabilities of the proposed method are statistically evaluated and the advantages with respect to existing formulas are discussed.
Confinement Effectiveness in Eccentrically Loaded Masonry Columns Strengthened by Fiber Reinforced Cementitious Matrix (FRCM) Jackets
Authors: Ombres Luciano
Published: September 2014

Abstract.The paper is devoted to the analysis of the effectiveness of the Carbon Fiber Reinforced Cementitious Matrix (C-FRCM) as confinement system of the masonry and the characterization of the structural response of masonry column confined by C-FRCM jackets, accounting for all geometrical and mechanical involved parameters. At this aim, tests on confined masonry column under eccentric axial load were carried out. Five masonry column having an overall length of650 mm, with rectangular cross-section,250 x250 mm, were eccentrically loaded until collapse; two specimens were un-confined and used as control specimens, two specimens were confined with one layer of C-FRCM and one specimen was confined with two layers of C-FRCM. The eccentricity values considered weree/H=0ande/H=0.20, being H the height of the section. Failure modes and load-strain diagrams were considered to analyze test results and to evaluate the effectiveness of the confinement both in terms of strength and ductility.
FRP Strengthening of Masonry Columns: Experimental Tests and Theoretical Analysis
Authors: Valdés Monica , Concu Giovanna , de Nicolo Barbara
Published: September 2014

Structural rehabilitation involving upgrading of existing structures and buildings conservation has becoming increasingly important. In this paper an experimental campaign on natural stone masonry columns axially confined by fiber reinforced polymers (FRP) is presented and discussed. Two different FRP wrapping system have been used: CFRP (carbon-fiber-reinforced polymer) embedded in epoxy resin, and FRMC (fiber-reinforced-cementitious matrix) embedded in two layers of a special mortar acting as bonding agent. A comparison between the two systems has been carried out. Results show that the ultimate load, stiffness and ductility significantly increase compared with unreinforced columns. Pre-damaged columns strengthened with CFRP and FRCM recover their load bearing capacity and improve their ductility. In addition, experimental results have been compared to theoretical strength previsions provided by literature analytical models, and findings have been analyzed and discussed.
Dynamic Analysis of FRP-Reinforced Masonry Arches via a No-Tension Model with Damage
Authors: Lucchesi Massimiliano , Pintucchi Barbara , Zani Nicola
Published: September 2014

A FE beam model to perform static and dynamic analysis of fiber-reinforced masonry arches is presented. Based on a constitutive equation formulated for no-tension masonry beams, the model accounts for a limit to the material deformability and provides for irreversible damage occurring under compression. In order to capture any possible FRP debonding, a procedure is also formulated to reduce the performance of the fiber when the tangential and normal stresses at the masonry-composite interface reach a critical value. Some dynamic analyses are performed on a case study with the aim of evaluating the effectiveness of FRP-retrofitting in improving seismic performances.
Confinement of Masonry Columns with PBO FRCM Composites
Authors: Carloni Christian , Mazzotti Claudio , Savoia Marco , Subramaniam Kolluru V.
Published: September 2014

The overarching goal of this work is to provide a fundamental understanding of the behavior of solid brick masonry columns confined with fiber reinforced cementitious matrix (FRCM) composites. FRCM is a newly-developed type of composite material comprised of a cementitious inorganic matrix (binder) and embedded fibers that are usually bundled to improve the bond between the matrix and the fibers. Compression tests were carried out to investigate the influence of the FRCM confinement and the brick patterns on the load-carrying capacity of the confined columns. Compression tests were conducted on brick masonry columns with different brick configurations. Digital image correlation measurements on the surface of the composite and on the surface of the brick for the control specimens were attempted in order to understand the role of the mortar joints and the arch effect across the section of the columns due to the confinement. The experimental results indicate that FRCM composites can effectively increase the load-carrying capacity of brick masonry columns and the failure mode could be different from the one observed for masonry columns confined with fiber-reinforced polymer (FRP) composites.
The Role of the Adhesive on the Bond Behavior of SRPs Applied on Masonry Supports: Experimental and Numerical Study
Authors: Grande Ernesto , Imbimbo Maura , Sacco Elio
Published: September 2014

Steel Reinforced Polymers (SRP) have been recently introduced and adopted as strengthening systems for existing constructions. Although the interest for this kind of strengthening materials is increasing also for masonry structures, in particular for historic constructions, only few studies specifically pertained to masonry elements strengthened with SRPs are available in the literature. In this context, a twofold purpose is at the basis of the present paper. The first one consists of experimentally investigating the bond behavior of masonry elements strengthened with SRPs using different types of adhesives and strips density. The second purpose aims at developing simple formulations for evaluating the bond resistance of masonry elements strengthened with SRPs applied with different types of adhesive systems.
Biodegradable Chitosan Scaffolds: Effect of Genipin Crosslinking
Authors: Sampaio Greyce Yane Honorato , Fook Ana C.B.M. , Fideles Thiago Bizerra , Cavalcanti M.E.R.R.M. , Fook Marcus Vinícius Lia
Published: September 2014

Currently researchers has pointed chitosan as one of the viable alternatives for application as scaffolds in tissue regeneration, mainly due to its availability, biocompatibility, biodegradability and ability to chemical modifications, among them, the crosslinking. With the growing number of investigations of crosslinking agents from natural sources and its applicability, this work focuses on the development and microstructural characterization of chitosan scaffolds and chitosan crosslinked with genipina using the technique of freeze drying. Solutions were prepared with chitosan concentration of 2% (w / t), and genipin 0.15% (w / t) and 0.3% (w / t). These were frozen at-20 ° C and ≈ 196 ° C, and lyophilized. The effect of different concentrations of genipin and freezing rates of the solutions in the porous architecture of the scaffolds were evaluated by Scanning Electron Microscopy (SEM), Optical Digital Microscopy 2D and 3D (OM) and testing the Degree of Swelling (DS). The SEM analysis revealed the formation of a three dimensional structure with pores and / or channels interconnected, influenced by the freezing rate and addition of crosslinking agent, these variables also influence the absorption capacity of the scaffolds. It was observed by OM, the effectiveness of the crosslinking with genipin, through points of fluorescence presented.
Synthesis of MCM-22 Zeolite Membrane on a Porous Alumina Support
Authors: dos S. Barbosa Antonielly , dos S. Barbosa Antusia , Rodrigues Meiry Glaucia F.
Published: September 2014

Much interest has been aroused in the application in industrial processes using zeolite membrane, due to its crystalline structure, and narrow pore diameters. These features enable the continuous separation of mixtures based on differences in molecular size and shape and also based on different adsorption properties. This paper reports the synthesis of MCM-22 zeolite membrane, using the method of secondary growth. The MCM-22 zeolite was synthesized by the hydrothermal method and characterized by spectroscopy Energy Dispersive X-ray (EDX), X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM).The ceramic support (α-alumina) was prepared using the technique of forming powder and then subjected to the sintering temperature of 1400 °C/1h and characterized by XRD. The zeolite membrane preparation was performed by the method of secondary growth and characterized by XRD, SEM and mercury porosimetry. The obtained zeolite membrane could be confirmed by X-ray diffraction. From, the obtained SEM pictures it was possible to observe the formation of a homogeneous film on the zeolite surface of the ceramic support (α-alumina).
Evaluation of Chocolate Clay Removal of Lead in B (Pb2+) System in Finite Bath
Authors: Silva Souza Rochélia , Mota Joseane Damasceno , Freire Rodrigues Meiry Glaúcia
Published: September 2014

Environmental problems caused by the presence of toxic metals in effluents emitted by various industries are contaminating surface water and subsoil and this has generated much discussion.
Effects of Reduction of Percent of Template (HMI) and Time of Static Synthesis on the Structure of MCM-22 Zeolite
Authors: dos Santos Everton R.F. , Leite Romulo C.N. , Sousa Aécio B. , Laborde Herve M. , Rodrigues Meiry Glaucia F.
Published: September 2014

This work aims to study the effects of reducing the level of template HMI (100, 75, 50, 25 and 0% HMI) and time (10, 9 and 8 days) of static synthesis in the structure of MCM-22 zeolite. The synthesis of the MCM-22 (P) precursors was carried out by using hexamethyleneimine (HMI) as organic template under static conditions. The MCM-22 zeolites (100, 75 e 50% HMI) was obtained by the calcination of precursors MCM-22 (P) in a muffle to remove the occluded organic of precursors. These materials were characterized by X-ray diffraction (XRD), spectroscopy of X-ray for energy dispersive (EDX), adsorption isotherms of N2(BET method), Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). The XRD's and EDX's of all samples have confirmed the static synthesis of MCM-22, whose precursor and zeolite materials showed all the characteristic peaks of the topology MWW. The Adsorption isotherms of N2are of type I, represented by microporous materials, whose hysteresis (type H3) are representative of solids with pores of different geometries. The FTIR's shown that the precursors showed the characteristic bands of a laminated material. From the SEM's, it was found the samples calcined MCM-22 are constituted by strip-shaped crystals agglomerated with a depression in the central region. In the sample MCM-22 (P) 75% HMI (8 days), showed no crystals uniform due to the presence of unreacted material in relation to crystalline phases.
Morphological Analysis of Chip Generated by the Process of Turning on Bronze Aluminium Industry Used in Aeronautics via Electronic Scanning Microscopy
Authors: Amancio Daniel Assis , Ribeiro de Toledo José Veríssimo , Ferreira João Roberto , Melo Mírian de Lourdes Noronha Motta , Silva Gilbert , Paes Luiz Eduardo
Published: September 2014

In machining processes the chip is considered the disposal of no interest and so little analysis of the morphology observed as the types and forms submitted. The machining does not equal the composition of the physical properties of metal forming, it involves forces or active and inactive stocks. The combination of parameters, conditions and variables of the machining is a means of speculating and trying to explain the phenomena. Such actions reflect directly on the wear of tooling, and structural integrity. The experimental study of machining is of essential importance for the theory of plasticity can not explain satisfactorily the observed phenomena. The speed and the deformations are very large in the machining process, compared with those treated in this theory. This material may reveal why this chip segmented nature which are characterized by continuous large deformation in narrow bands between segments with little or no strain in their interiors. This is a very different from the continuous chip. With the aid of a tool in the expanding area of technology and scientific processing and analysis of images could provide a better analysis of the chips. The goal of this study was to relate the microstructure of the chips of superalloy Aluminum Bronze (C 63020) with milling parameters used in the process of turning on a CNC lathe Nardini - LOGIC 175, in order to analyze the behavior of even through a mechanical process.
Sensitivity on Numerical Weather Prediction in the Northwest of Spain
Authors: Lutif Ellen Yoshie Sudo , Pérez Muñuzuri Vicente
Published: September 2014

Our ability to predict clouds and precipitation at the daily, weekly and monthly scales is very limited partly due to the limited computing resources and realistic physical model representations Giorgi et al. (1991).
An Innovative Approach to Mine Blast Fragmentation Management Using Complexity Analysis: Three Case Studies
Authors: Dompieri Maurício , Seccatore Jacopo , de Tomi Giorgio , Nader Beck , de Lima José Renato B. , Chaves Arthur P.
Published: September 2014

This paper introduces an innovative solution for devising a robust blasting plan that will present consistently good fragmentation performance under highly uncertain environments. The analysis will be carried out using complexity analysis tools, a model-free approach to complex systems which is particularly well suited to the problem of finding non-deterministic dependencies between multiple variables. The study is backed-up by data from over 2,000 blast records from Brazilian mines and identifies what are the critical aspects of the system and how to manage the blasting plan to reduce their impact on its performance.
Study of Non-Conformities of Hip Prosthesis Metal Front Standards
Authors: da Silva Morais Crislene Rodrigues , da Silva Nascimento José Jefferson , de Oliveira Bezerra Ewerton , Filho Francisco Pinto , Falcão Gabriela Amorim Muniz
Published: September 2014

The arthroplasty is a surgical procedure which is characterized by replacing the defective joint surfaces of biomaterials intended to restore the function of these joints. As soon because the relevance of the topic, this paper aims at studying the unconformities two hip prostheses, titanium and other stainless steel front to standardizations. The implants studied were characterized by techniques: X-ray fluorescence, microanalysis Dispersion Energy X-ray diffraction, scanning electron microscopy and optical microscopy, and tests were carried out physic-mechanical traction and hardness. The unconformities present are analyzed and discussed.
Ion Bean Etching on Ti-30Ta Alloy for Biomedical Application
Authors: Capellato Patricia , Riedel Nicholas A. , Williams John D. , Machado João P.B. , Popat Ketul C. , Alves Claro Ana Paula Rosifini
Published: September 2014

Titanium and titanium alloys are currently being used for clinical biomedical applications due to their high strength, corrosion resistance and elastic modulus. However, these materials have recently been shown to exhibit ion release and poor physiological integration that may result in fibrous encapsulation and further biomaterial rejection. In order to be a successful replacement for bone current approaches for enhancing the mechanical and biological properties of Ti was alloyed Ti with Ta due to it provides greatly improved mechanical properties which include fracture toughness and workability. Studies have shown techniques such ion beam etching, heat and alkaline treatment, SBF coatings and anodization to promote altered cellular response on Ti and Ti-alloys. In this study Ti-30Ta alloy was investigated ion beam etching. The SEM was used to investigate the topography, EDS the chemical composition, and surface energy was evaluate with contact angle analyze due to the topography have effect on protein adsorption, platelet adhesion, blood coagulation and bacterial adhesion. This study concludes Ti-30Ta alloy substrate with ion beam etching was not favorable for biomedical application.
Characterization of Elephant Grass Ash as a Potential Clay Ceramic Addition
Authors: da Silva Aline Marcia Ferreira Dias , Sales Karla Albernaz , Candido Veronica Scarpini , Monteiro Sergio Neves , Vieira Carlos Maurício Fontes
Published: September 2014

The elephant grass (Pennicetum purpureum) is traditionally used both as fresh feedstock for cattle and, dried, as fuel for ceramic production in Campos dos Goytacazes, Brazil. In the present work the bottom ash generated after dry grass incineration in a ceramic furnace was characterized for a possible addition into red clay ceramics. The characterization comprised the ash morphology by laser microscopy, scanning electron microscopy coupled with EDS and thermal behavior by thermogravimetry as well as differential thermal analysis. These results indicated that the elephant grass ash could be added into a clay body not only as a fluxing agent but also to improve the particles compaction before firing.
The Use of Robot with Force Control in Machining of Green Ceramics
Authors: Lahr Gustavo José Giardini , Caurin Glauco Augusto de Paula , Fortulan Carlos Alberto
Published: September 2014

This papers studies the use of robots in the green machining of ceramics, specifically, the machining of high alumina porcelain insulators. The green state has very low strength and high brittleness where the forces applied during machining can generate and/or develop defects in the part that will reduce their properties after sintering. This work aims to study the machining by robot models of electrical insulators in 1:10 scale. Blanks were compacted in high alumina porcelain by isostatic pressing and green machined with a manual grinder attached to a Kuka KR16 robot. Models of insulators in gypsum were successfully machined and used for setup and configuration of the process. They were machined with cutting depth 0.87 mm and feed of 20 mm/s, this is the minimum programmable velocity for this robot model, and these parameters for the machining of the green porcelain generated excessive cracks at the tips of the fins. Changing the cutting depth to values of 0.25 mm, an established value in CNC machining, allowed to conclude that insufficient stiffness of the robot together with its high forward speed and excessive vibration of the grinding limits its use for thin thicknesses, although with potential for improvement.
Study of Elastic Properies of Ti3Al Intermetallic Compound Using the Ab Initio Calculation
Authors: Soufen Carlos Alberto , de Campos Marcelo Capella , Pintão Carlos Alberto Fonzar , Imaizumi Momotaro
Published: September 2014

The elastic properties of a Ti3Al intermetallic compound were studied using full potential (FP LAPW ) with the APW+lo method. The FP-LAPW is among the most accurate band structure calculations currently available and is based on the density functional theory with general gradient approximation for the exchange and correlation potential. This method provides the structural properties of the ground state as bulk modulus, equilibrium lattice parameter, and equilibrium minimum energy, and the elastic properties as shear modulus, young modulus, Zener coefficient (anisotropy), and Poisson coefficient. The calculated elastic properties are coherent with the elastic properties of the material.
John Holt
Authors: Meighan Roland , Bailey Richard
Published: September 2014

A major international reference series providing comprehensive accounts of the work of seminal educational thinkers from a variety of periods, disciplines and traditions. It is the most ambitious and prestigious such project ever published – a definitive resource for at least a generation. The thinkers include: Aquinas, Aristotle, Bourdieu, Bruner, Dewey, Foucault, Freire, Holt, Kant, Locke, Montessori, Neill, Newman, Owen, Peters, Piaget, Plato, Rousseau, Steiner, Vygotsky, West and Wollstonecraft.

John Holt is indisputably a major thinker in education. Roland Meighan’s volume offers the most coherent account of Holt’s educational thought. This work is divided into: Intellectual biography

Critical exposition of Holt’s work: The reception and influence of Holt’s work and The relevance of the work today.
Retranslation
Authors: Deane-Cox Sharon
Published: September 2014

Retranslation is a phenomenon which gives rise to multiple translations of a particular work. But theoretical engagement with the motivations and outcomes of retranslation often falls short of acknowledging the complex nature of this repetitive process, and reasoning has so far been limited to considerations of progress, updating and challenge; there is even less in the way of empirical study.

This book seeks to redress the balance through its case studies on the initial translations and retranslations of Flaubert’s Madame Bovary and Sand’s pastoral tale La Mare au diable within the British literary context. What emerges is a detailed exposition of how and why these works have been retold, alongside a critical re-evaluation of existing lines of enquiry into retranslation. A flexible methodology for the study of retranslations is also proposed which draws on Systemic Functional Grammar, narratology, narrative theory and genetic criticism.
Aesthetic Sexuality: A Literary History of Sadomasochism
Authors: Byrne Romana
Published: September 2014

To understand why the concept of aesthetic sexuality is important, we must consider the influence of the first volume of Foucault's seminal The History of Sexuality. Arguing against Foucault's assertions that only scientia sexualis has operated in modern Western culture while ars erotica belongs to Eastern and ancient societies, Byrne suggests that modern Western culture has indeed witnessed a form of ars erotica, encompassed in what she calls 'aesthetic sexuality'.

To argue for the existence of aesthetic sexuality, Byrne examines mainly works of literature to show how, within these texts, sexual practice and pleasure are constructed as having aesthetic value, a quality that marks these experiences as forms of art. In aesthetic sexuality, value and meaning are located within sexual practice and pleasure rather than in their underlying cause; sexuality's raison d'être is tied to its aesthetic value, at surface level rather than beneath it. Aesthetic sexuality, Byrne shows, is a product of choice, a deliberate strategy of self-creation as well as a mode of social communication.
Assembling Flann O’Brien
Authors: Long Maebh
Published: September 2014

Flann O’Brien - also known as Brian O’Nolan or Myles na gCopaleen - is now widely recognised as one of the foremost of Ireland’s modern authors. Assembling Flann O’Brien explores the author’s innovative and experimental work by reading him in relation to some of the 20th century’s most important theorists, including Derrida, Agamben, Freud, Lacan and Žižek.

Assembling Flann O’Brien offers a detailed study of O’Brien’s five major novels – including At Swim-Two-Birds and The Third Policeman – as well as his plays, short stories, journalistic output and unpublished archival material. The book presents new theoretical perspectives on his works, exploring his compelling engagements with questions of the proper name, the archive, law, and desire, and the problems of identity, language, sexuality and censorship which acutely troubled Ireland’s new state. Combining a wide range of contemporary theory with a sensitivity to the cultural and political context in which the author wrote, Maebh Long opens up entirely new aspects of Flann O’Brien’s writings, and explores the ingenious and the problematic within his oeuvre.