WorldWideScience

Sample records for flexi flange post

  1. Finite elements study of the Flexi Post and Flexi Flange post systems in a maxillary central incisor Estudo pelo método dos elementos finitos dos pinos Flexi Post e Flexi Flange em um incisivo central superior

    Directory of Open Access Journals (Sweden)

    Hugo Roberto Lewgoy

    2003-06-01

    Full Text Available The use of post and core systems has become an excellent alternative for restoring endodontically treated teeth. The aim of this study was to evaluate the von Mises, maximal compressive and tensile stresses distribution using the Finite Element Method (FEM on human teeth restored with different post and core systems. The analysis was made on endodontically treated maxillary central incisors. The post systems used in this investigation were the stainless steel or titanium Flexi Post/Flexi Flange. Composite resin was used as core material and resin cement was the cement material of choice to seat a full porcelain crown. The bi-dimensional mathematical model was created from pictures taken from an intact human maxillary central incisor and prefabricated posts. This image was transferred to a personal computer in the MSC/Nastran 4.5 software. A static and linear analysis treatment was performed when a 45º load of 100 N was applied on the lingual surface of the tooth. Based on the results obtained, it can be concluded that the post design and its material can alter the stress pattern distribution.A utilização de pinos intra-radiculares tem se mostrado uma excelente alternativa para dentes endodonticamente tratados. Este trabalho teve como objetivo avaliar, utilizando o Método dos Elementos Finitos (MEF, como pinos intra-radiculares pré-fabricados metálicos podem alterar o padrão das tensões geradas de von Mises e de máxima tração e compressão na raiz dental. A comparação foi realizada entre os pinos pré-fabricados Flexi Post/Flexi Flange de aço inoxidável e titânio com preenchimento coronário em resina composta. Os pinos intra-radiculares foram fixados com um cimento resinoso e recobertos por uma coroa total cerâmica. A partir de fotografias da peça anatômica e dos pinos estudados, foram criados modelos matemáticos bidimensionais no programa MSC/Nastran 4.5 e, após aplicação de uma força de 100 N a 45 graus na superf

  2. Informe sobre Ensayo de Flexión Estática en Postes de Ciprés (Cupressus Lusitánica Miller, para Instalaciones Eléctricas y Telefónicas.

    Directory of Open Access Journals (Sweden)

    Hoheisel Hannes

    1973-06-01

    Full Text Available Los postes de madera utilizados para tendido de líneas eléctricas y telefónicas están sometidos a dos tipos de esfuerzos: a Esfuerzo de compresión axial, debido al peso del poste y de los hilos. b Esfuerzo de flexión debido a la acción del viento o a una tensión accidental de los hilos. Para efectos de cálculo, la compresión axial no se toma en cuenta por ser muy pequeña; pero la flexión tiene importancia y es el ensayo básico para el diseño de postes. El ensayo de postes a la flexión se realiza en postes de tamaño natural (9-10 m. . Se considera el presente informe como preliminar, debido a que no existe en este momento una clasificación de los postes en cuanto a la resistencia a la flexión. El Laboratorio de Productos Forestales de la Universidad Nacional, Sede de Medellín, tiene en su plan de trabajo un estudio de clasificación de postes con base en la resistencia a la flexión y de acuerdo con el rango de diámetros que puedan utilizarse, para correlacionar datos de resistencia de postes de diferentes tamaños.

  3. FLEXI Project Management Survey

    Science.gov (United States)

    Rohunen, Anna; Krzanik, Lech; Kuvaja, Pasi; Similä, Jouni; Rodriguez, Pilar; Hyysalo, Jarkko; Linna, Tommi

    FLEXI Project Management Survey (FLEXI PMS) has been established to gain detailed knowledge on how the software industry - in particular successful companies - manages agile software development. FLEXI PMS investigates the actual agile values, principles, practices and contexts. The survey is supported by a careful literature review and analysis of existing studies. Special attention is attached to large, multi-site, multi-company and distributed projects - the target area of FLEXI project. The survey is intended to provide solid data for further knowledge acquisition and project/company positioning with regard to feasible agile management practices.

  4. Informe sobre ensayo de flexión estática en postes de ciprés (cupressus lusitánica miller), para instalaciones eléctricas y telefónicas.

    OpenAIRE

    2012-01-01

    Los postes de madera utilizados para tendido de líneas eléctricas y telefónicas están sometidos a dos tipos de esfuerzos: a) Esfuerzo de compresión axial, debido al peso del poste y de los hilos. b) Esfuerzo de flexión debido a la acción del viento o a una tensión accidental de los hilos. Para efectos de cálculo, la compresión axial no se toma en cuenta por ser muy pequeña; pero la flexión tiene importancia y es el ensayo básico para el diseño de postes. El ensayo de p...

  5. Reusable pipe flange covers

    Energy Technology Data Exchange (ETDEWEB)

    Holden, James Elliott (Simpsonville, SC); Perez, Julieta (Houston, TX)

    2001-01-01

    A molded, flexible pipe flange cover for temporarily covering a pipe flange and a pipe opening includes a substantially round center portion having a peripheral skirt portion depending from the center portion, the center portion adapted to engage a front side of the pipe flange and to seal the pipe opening. The peripheral skirt portion is formed to include a plurality of circumferentially spaced tabs, wherein free ends of the flexible tabs are formed with respective through passages adapted to receive a drawstring for pulling the tabs together on a back side of the pipe flange.

  6. Radial wedge flange clamp

    Science.gov (United States)

    Smith, Karl H.

    2002-01-01

    A radial wedge flange clamp comprising a pair of flanges each comprising a plurality of peripheral flat wedge facets having flat wedge surfaces and opposed and mating flat surfaces attached to or otherwise engaged with two elements to be joined and including a series of generally U-shaped wedge clamps each having flat wedge interior surfaces and engaging one pair of said peripheral flat wedge facets. Each of said generally U-shaped wedge clamps has in its opposing extremities apertures for the tangential insertion of bolts to apply uniform radial force to said wedge clamps when assembled about said wedge segments.

  7. Weldless Flange Connections

    OpenAIRE

    Andersson, Mattias; Jonsson, Henrik; Löfqvist, Stefan; Maigne, Remi; Bravo, Unai

    2004-01-01

    This development project is a bachelor’s degree thesis work that will conclude the education program ”Development Technology” at Blekinge Institute of Technology. The development project has been done in cooperation with Faurecia Exhaust Systems AB in Torsås that constructs and manufactures manifolds, catalytic converters, mufflers and whole exhaust systems. The task with this project was to find a new solution concept for the connection of pipes into flanges in manifolds. The concept that Fa...

  8. Design of floating type bolted flange connections with grp flanges

    Energy Technology Data Exchange (ETDEWEB)

    Kurz, H., E-mail: hariolf.kurz@mpa.uni-stuttgart.de [Materialpruefungsanstalt (MPA), University of Stuttgart, Pfaffenwaldring 32, D-70569 Stuttgart (Germany); Roos, E. [Materialpruefungsanstalt (MPA), University of Stuttgart, Pfaffenwaldring 32, D-70569 Stuttgart (Germany)

    2012-01-15

    The goal of the presented work is to enable plant operators in the chemical industry to design and to operate glass-reinforced-plastics (specified in the following as grp) piping with grp flanges at temperatures up to 80 Degree-Sign C, using polytetraflourethylene (PTFE) gaskets that shall replace the mandatory rubber gaskets. Various gaskets on the basis of rubber (EPDM) and PTFE were investigated in view of the boundary conditions in bolted flange connections with glass-fiber reinforced plastic flanges in compliance with DIN EN 13555. The rubber gasket and the PTFE based gasket with a PTFE-diffusion barrier meet the leakage rate criterion of TA Luft under the conditions of bolted flange connections with grp flanges. The mechanical behavior of bolted flange connections DN50 with grp flanges was investigated and is taken into consideration in a new calculation procedure, that accounts for the specific material properties of grp and thus allows higher bolt forces, what leads to increased tightness and operational reliability of the plants. This draft procedure with experimental pre-tests (already demanded in DIN 16966) is now available to design bolted flange connections with grp flanges. - Highlights: Black-Right-Pointing-Pointer In this study we identify a PTFE-gasket with an acceptable performance in grp flanges. Black-Right-Pointing-Pointer The mechanical behavior of grp flanges is examined via experiment and FEM. Black-Right-Pointing-Pointer The derivation of a design concept for grp-loose flanges is presented. Black-Right-Pointing-Pointer The design concept shows good agreement with the FE simulation and experiment. Black-Right-Pointing-Pointer Applying the design concept leads to an increase in service reliability.

  9. Evaluation of TEP Deaeration Tower Rectangular Flange

    Institute of Scientific and Technical Information of China (English)

    WANG; Zhi-hao

    2013-01-01

    The rectangular flange is adapted in the heater of TEP deaeration tower(Fig.1).The rectangular flange is no-round type flange,the evaluation of which is worked on equivalent round flange method.Thecalculation is based on no-round type flange evaluation chapter in HGT 20582—2011 Steel chemical vessel strength calculation code.The loads on the flange are inner pressure,nozzle loads and seismic loads.The nozzle loads is

  10. Cryogenic Flange and Seal Evaluation

    Science.gov (United States)

    Ramirez, Adrian

    2014-01-01

    The assembly of flanges, seals, and pipes are used to carry cryogenic fluid from a storage tank to the vehicle at launch sites. However, after a certain amount of cycles these raised face flanges with glass-filled Teflon gaskets have been found to have torque relaxation and are as a result susceptible to cryogenic fluid leakage if not re-torqued. The intent of this project is to identify alternate combinations of flanges and seals which may improve thermal cycle performance and decrease re-torque requirements. The general approach is to design a test fixture to evaluate leak characteristics between spiral and concentric serrations and to test alternate flange and seal combinations. Due to insufficient time, it was not possible to evaluate these different types of combinations for the combination that improved thermal cycle performance the most. However, the necessary drawings for the test fixture were designed and assembled along with the collection of the necessary parts.

  11. Flange Curling in Cold Formed Profiles

    DEFF Research Database (Denmark)

    Jönsson, Jeppe; Ramonas, Gediminas

    2012-01-01

    The non-linear flange curling phenomenon in cold formed profiles is the tendency of slender flanges to deform towards the neutral axis for increasing flexural curvature. Based on Braziers work, Winter proposed a simple engineering formula for determination of the local flange deformation towards...

  12. Cooling Waveguide Flanges in Microwave Transmitters

    Science.gov (United States)

    Chen, B. C.; Hartop, R. W.

    1984-01-01

    Flang appendage circulates coolant for conductive heat removal. Flange appendage bore accomodates coolant tube. O-ring surrounds bore; when adjacent waveguide sections are bolted together, continuous conduit is formed for coolant. Pressure release groove in modified flange prevents coolant from entering waveguide should O'ring seal fail.

  13. Influencia del diseño de alta flexión, con conservación del LCP, en el rango de movimiento tras la implantación de una prótesis total de rodilla

    OpenAIRE

    Castillón Bernal, Pablo

    2011-01-01

    Els nous implants de genoll pretenen millorar la flexió màxima aconseguida amb els implants convencionals. El nostre estudi pretén demostrar que els pacients intervinguts quirúrgicament, per a la implantació d'una artroplàstia total de genoll d'alta flexió, són capaços d'aconseguir un balanç articular i una flexió màxima superior a l'aconseguida pels pacients tractats amb el model convencional. La flexió màxima post-operatòria, a l'any de la intervenció, va ser 13º major en el grup de pacient...

  14. Alternative Education Engaging Indigenous Young People: Flexi Schooling in Queensland

    Science.gov (United States)

    Shay, Marnee; Heck, Deborah

    2015-01-01

    This article will discuss some of the findings from a qualitative research project that explored the connections between alternative education and Indigenous learners. This study investigated how flexi school leaders reported they were supporting Indigenous young people to remain engaged in education. The results of the survey provide demographic…

  15. Design of Bolted L-Flanged Connections

    DEFF Research Database (Denmark)

    Pedersen, Niels Leergaard

    2016-01-01

    on the tower and the tensile force in the bolt. In the literature and also in design standards different models are presented for this important non-linear response. The present work presents a simplified expression for the non-linear force response based on finite element calculations using contact analysis......In wind turbine towers the preferred design is circular tubes that are connected to each other by a bolted flange joint. The design is typically that of an L-flange resulting in an eccentrically loaded bolted connection. The eccentricity results in a non-linear relationship between external load....... Secondly, focus is on simple modifications of the flange design that considerably improves the strength of the connection....

  16. 46 CFR 154.528 - Piping joints: Flange type.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 5 2010-10-01 2010-10-01 false Piping joints: Flange type. 154.528 Section 154.528... and Process Piping Systems § 154.528 Piping joints: Flange type. (a) A flange must be one of the following types: (1) Welding neck. (2) Slip-on. (3) Socket weld. (b) If the piping is designed for...

  17. 46 CFR 154.526 - Piping joints: Flange connection.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 5 2010-10-01 2010-10-01 false Piping joints: Flange connection. 154.526 Section 154.526 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) CERTAIN BULK DANGEROUS CARGOES... Equipment Cargo and Process Piping Systems § 154.526 Piping joints: Flange connection. Flange...

  18. Influence of Friction Condition on Cold Upsetting of Tube Flange

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    FEM is used to analyze the influence of interface friction on the material flow and the cause of forming defect in the cold upsetting of tube flange. Based on the FEM simulation results, the relationships between flange width and the extreme friction factors are established. The concept of forming limit diagram for cold upsetting of tube flange is presented.

  19. Flange Correction For Metal-To-Metal Contacts

    Science.gov (United States)

    Lieneweg, Udo; Hannaman, David J.

    1991-01-01

    Improved mathematical model provides correction for flange effect in estimating resistance of square contact between two metal layers from standard four-terminal measurements. Extended version of one developed previously for contact between metal layer and semiconductor layer, wherein flange effect important in semiconductor layer only. Here flange effect in both metal layers significant. Interfacial resistances extracted more accurately.

  20. Behavior of horizontally curved steel tubular-flange bridge girders

    Science.gov (United States)

    Fan, Zhuo

    A new type of curved steel bridge girder, called a curved tubular-flange girder, with rectangular tubes as flanges, is proposed and studied in this dissertation. A curved steel tubular-flange girder has much larger torsional stiffness than a curved I-girder and less potential for cross section distortion than a curved box-girder. Therefore, it has potential advantages compared to curved I-girders and box-girders. A theoretical analysis method for systems of curved tubular-flange girders braced by cross frames is presented. A stress analysis method for tubular-flange girders is also provided. The behavior of curved tubular-flange girder systems is studied using the theoretical analysis method and compared to the behavior of the corresponding curved I-girder systems. A parametric study is performed using the theoretical analysis method to investigate the effects of geometric parameters on the behavior of curved tubular-flange girder systems. The studied parameters include tubular-flange width, tubular-flange depth, cross section depth, girder curvature, and the number of cross frames. Finite element analyses are conducted to verify the theoretical analysis method, to study the behavior of a curved tubular-flange girder system under dead load, and to study the behavior of a curved tubular-flange girder system with a composite concrete deck under dead and live load. The study shows that a curved tubular-flange girder system develops much less warping normal stress and cross section rotation than a corresponding curved I-girder system. The difference is especially significant for a single curved girder under its own weight, suggesting that curved tubular-flange girders would be much easier to transport and erect than curved I-girders. As girder curvature increases, the rate of increase in the stresses and displacements for a single I-girder is much greater than for a single curved tubular-flange girder. Smaller cross frame forces develop in a tubular-flange girder

  1. Prediction of brittle fracture of epoxy-aluminum flanging

    Directory of Open Access Journals (Sweden)

    Korbel J.

    2010-07-01

    Full Text Available This paper presents a fracture mechanical approach for estimation of critical bending load of different types of aluminum-epoxy flanging and comparison with experimental measurements. For this purpose, several designs of the flanges were investigated. The flanges were glued to the epoxy bars and adhesive-epoxy interface was considered as a bi-material notch. Prediction of the failure is based on generalized stress intensity factor and generalized fracture toughness.

  2. 46 CFR 56.30-10 - Flanged joints (modifies 104.5.1(a)).

    Science.gov (United States)

    2010-10-01

    ... on the flange for the full circumference as close as possible to the fillet of the flange. The number...-10 (b), Method 8. Welding neck flanges may be used on any piping provided the flanges are butt-welded..., refer to 46 CFR 56.30-5(b) for requirements. (9) Figure 56.30-10 (b), Method 9. Welding neck flanges...

  3. FlexiWay: A Cache Energy Saving Technique Using Fine-grained Cache Reconfiguration

    Energy Technology Data Exchange (ETDEWEB)

    Mittal, Sparsh [ORNL; Zhang, Zhao [Iowa State University; Vetter, Jeffrey S [ORNL

    2013-01-01

    Recent trends of CMOS scaling and use of large last level caches (LLCs) have led to significant increase in the leakage energy consumption of LLCs and hence, managing their energy consumption has become extremely important in modern processor design. The conventional cache energy saving techniques require offline profiling or provide only coarse granularity of cache allocation. We present FlexiWay, a cache energy saving technique which uses dynamic cache reconfiguration. FlexiWay logically divides the cache sets into multiple (e.g. 16) modules and dynamically turns off suitable and possibly different number of cache ways in each module. FlexiWay has very small implementation overhead and it provides fine-grain cache allocation even with caches of typical associativity, e.g. an 8-way cache. Microarchitectural simulations have been performed using an x86-64 simulator and workloads from SPEC2006 suite. Also, FlexiWay has been compared with two conventional energy saving techniques. The results show that FlexiWay provides largest energy saving and incurs only small loss in performance. For single, dual and quad core systems, the average energy saving using FlexiWay are 26.2%, 25.7% and 22.4%, respectively.

  4. Numerical Analysis on Rotary Forging Mechanism of a Flange

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    A numerical simulation on the rotary forging process of a flange is conducted by three-dimensional rigid-plastic finite element method. The states of stress and strain rate in the workpiece are analyzed and the forging mechanism of the flange is revealed. Moreover, the influence of the die configuration on the material flow is also analyzed.

  5. Loads Analysis of Flanges of a Transonic and Supersonic Wind Tunnel Wide Angle Diffuser

    Institute of Scientific and Technical Information of China (English)

    CHEN Jian-bing; WANG Rui; CAI Qing-qing; GAO Xin-yu

    2012-01-01

    Compared with general circular flanges, flanges on conical shells have different configurations. In the Chinese national code GBISO, however, there are no related contents about flange design of this kind of type. So, it needs to study loads of flanges of this kind of type. This paper takes the flange connection of a wide angle diffuser in a transonic and supersonic wind tunnel as the background, according to the principles of flange design in Chinese national code GB150, combining the characteristics of flanges of a wide angle diffuser, the loads of flanges have been analyzed, and the equations of loads and their locations have been presented.

  6. The Ring-Centered Waveguide Flange for Submillimeter Wavelengths

    Science.gov (United States)

    Kerr, A. R.; Srikanth, S.

    2009-04-01

    The standard UG-387 waveguide flange (MIL-DTL-3922/67C) is not well suited for frequency bands above ~110 GHz. The proposed ring-centered flange has a precisely machined boss centered on the waveguide aperture and is aligned by a ring which centers the bosses of two mating flanges. The flange is compatible with the UG-387 type, allowing components with the new flange to be connected directly to older components without adapters. Like the UG-387 standard, it is sexless and the contact surfaces are not recessed, which facilitates cleaning and lapping to repair damage. The maximum misalignment between waveguides using the new flange should be < 0.001" (25 μm), corresponding to a worst-case return loss of 26 dB in the WR-1.9 band (400-600 GHz), or 16 dB in the WR-1.0 band (750-1100 GHz). A miniature version of the ring-centered flange is also proposed.

  7. Shear Strength of Concrete I-Beams - Contributions of Flanges

    DEFF Research Database (Denmark)

    Teoh, B. K.; Hoang, Cao Linh; Nielsen, Mogens Peter

    1999-01-01

    The contribution of flanges to the shear strength of reinforced concrete beams has up to now either been neglected or evaluated by very simple empirical formulas. However, the contribution may sometimes be large, up to 20-30%. In this paper the flange contribution for shear reinforced I-beams has...... been calculated using a simple upper bound approach according to the theory of plasticity. The upper bound mechanism consists of a frame action, where the frame is supposed to be composed by the flanges and parts of the web. The results of the calculation have been compared with tests covering a wide...

  8. Finite element analysis of bolted flange connections

    Science.gov (United States)

    Hwang, D. Y.; Stallings, J. M.

    1994-06-01

    A 2-D axisymmetric finite element model and a 3-D solid finite element model of a high pressure bolted flange joint were generated to investigate the stress behaviors. This investigation includes comparisons for axisymmetric loading of both the 2-D and 3-D models, the effects of non-axisymmetric bolt pretensions in the 3-D models, and the differences between 2-D and 3-D models subjected to non-axisymmetric loading. Comparisons indicated differences in von Mises stress up to 12% at various points due to the non-axisymmetric bolt pretensions. Applied bending moments were converted to equivalent axial forces for use in the 2-D model. It was found that the largest von Mises stresses in 3-D model did not occur on the side of the connection where the bending stresses and applied axial stresses were additive. Hence, in the 2-D model where the equivalent axial force (for bending moment) and applied axial forces were added, the 2-D model under estimated the maximum von Mises stress obtained from the 3-D model by 30%.

  9. Damage percolation during stretch flange forming of aluminum alloy sheet

    Science.gov (United States)

    Chen, Zengtao; Worswick, Michael J.; Keith Pilkey, A.; Lloyd, David J.

    2005-12-01

    A multi-scale finite element (FE)-damage percolation model was employed to simulate stretch flange forming of aluminum alloys AA5182 and AA5754. Material softening and strain gradients were captured using a Gurson-based FE model. FE results were then fed into the so-called damage percolation code, from which the damage development was modelled within measured microstructures. The formability of the stretch flange samples was predicted based upon the onset of catastrophic failure triggered by profuse void coalescence within the measured second-phase particle field. Damage development is quantified in terms of crack and void areal fractions, and compared to metallographic results obtained from interrupted stretch flange specimens. Parametric study is conducted on the effect of void nucleation strain in the prediction of formability of stretch flanges to "calibrate" proper nucleation strains for both alloys.

  10. Guidelines for Stretch Flanging Advanced High Strength Steels

    Science.gov (United States)

    Sriram, S.; Chintamani, J.

    2005-08-01

    Advanced High Strength Steels (AHSS) are currently being considered for use in closure and structural panels in the automotive industry because of their high potential for affordable weight reduction and improved performance. AHSS such as dual phase steels are currently being used in some vehicle platforms. From a manufacturing perspective, stretch flanging during stamping is an important deformation mode requiring careful consideration of geometry and the die process. This paper presents some geometric and process guidelines for stretch flanging AHSS. Hole expansion experiments were conducted to determine the failure limit for a sheared edge condition. Effects of punching clearance, prestrain and prior strain path on hole expansion were explored in these experiments. In addition, dynamic explicit FE calculations using LS-DYNA were also conducted for a typical stretch flange by varying some key geometric parameters. The experimental and FEA results were then analyzed to yield process and geometric guidelines to enable successful stretch flanging of AHSS.

  11. The in vivo effect of a porous titanium alloy flange with hydroxyapatite, silver and fibronectin coatings on soft-tissue integration of intraosseous transcutaneous amputation prostheses

    Science.gov (United States)

    Chimutengwende-Gordon, M.; Pendegrass, C.; Blunn, G.

    2017-01-01

    Aims The Intraosseous Transcutaneous Amputation Prosthesis (ITAP) may improve quality of life for amputees by avoiding soft-tissue complications associated with socket prostheses and by improving sensory feedback and function. It relies on the formation of a seal between the soft tissues and the implant and currently has a flange with drilled holes to promote dermal attachment. Despite this, infection remains a significant risk. This study explored alternative strategies to enhance soft-tissue integration. Materials and Methods The effect of ITAP pins with a fully porous titanium alloy flange with interconnected pores on soft-tissue integration was investigated. The flanges were coated with fibronectin-functionalised hydroxyapatite and silver coatings, which have been shown to have an antibacterial effect, while also promoting viable fibroblast growth in vitro. The ITAP pins were implanted along the length of ovine tibias, and histological assessment was undertaken four weeks post-operatively. Results The porous titanium alloy flange reduced epithelial downgrowth and increased soft-tissue integration compared with the current drilled flange. The addition of coatings did not enhance these effects. Conclusion These results indicate that a fully porous titanium alloy flange has the potential to increase the soft-tissue seal around ITAP and reduce susceptibility to infection compared with the current design. Cite this article: Bone Joint J 2017;99-B:393–400. PMID:28249981

  12. Upgrading a Shrouded Wind Turbine with a Self-Adaptive Flanged Diffuser

    Directory of Open Access Journals (Sweden)

    Jun-Feng Hu

    2015-06-01

    Full Text Available In this paper, a self-adaptive flange is proposed for the wind turbine shrouded by a flanged diffuser to reduce the wind loads acting on the flanged diffuser at high wind velocities. The self-adaptive flange can maintain the advantages of the flanged diffuser at wind velocities lower than the rated velocity and reduce the wind loads acting on the diffuser and blades at higher wind velocities. Numerical analyses of fluid-structure interactions are carried out to investigate the flow field around the diffuser with a self-adaptive flange and the variation of wind load acting on the diffuser due to the reconfiguration of the self-adaptive flange at various wind velocities. Numerical results show that the wind load acting on the total flanged diffuser can be reduced by about 35% at 60 m/s due to the reconfiguration of the self-adaptive flange.

  13. Flanged joints with contact outside the bolt circle: ASME Part B design rules

    Energy Technology Data Exchange (ETDEWEB)

    Rodabaugh, E. C.; Moore, S. E.

    1976-05-01

    The ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, gives rules which are subdivided into ''Part A'' and ''Part B''. Part A covers flanged joints where contact between flanges occurs through a gasket located inside the bolt holes. Part B covers flanged joints with contact outside the bolt holes. This report (a) summarizes the theory for Part B flanged joints, (b) presents examples which show the significant differences between Part A flanged joints and Part B flanged joints, (c) presents the available test data relevant to the characteristics of Part B flanged joints, (d) gives listings of two computer programs which can be used to evaluate the characteristics of Part B flanged joints, and (e) gives recommendations for Code revisions and other aspects of Part B flanged-joint design.

  14. 75 FR 67110 - Forged Stainless Steel Flanges From India and Taiwan

    Science.gov (United States)

    2010-11-01

    ... COMMISSION Forged Stainless Steel Flanges From India and Taiwan AGENCY: United States International Trade... stainless steel flanges from India and Taiwan. SUMMARY: The Commission hereby gives notice that it has... determine whether revocation of the antidumping duty orders on forged stainless steel flanges from India...

  15. 33 CFR 149.115 - What are the requirements for blank flange and shutoff valves?

    Science.gov (United States)

    2010-07-01

    ... blank flange and shutoff valves? 149.115 Section 149.115 Navigation and Navigable Waters COAST GUARD... EQUIPMENT Pollution Prevention Equipment § 149.115 What are the requirements for blank flange and shutoff valves? Each floating hose string must have a blank flange and a shutoff valve at the vessel's...

  16. PARAMETRIC STUDIES ON THE COMPONENT-BASED APPROACH TO MODELLING BEAM BOTTOM FLANGE BUCKLING AT ELEVATED TEMPERATURES

    Directory of Open Access Journals (Sweden)

    Guan Quan

    2016-04-01

    Full Text Available In this study, an analytical model of the combination of beam-web shear buckling and bottom-flange buckling at elevated temperatures has been introduced. This analytical model is able to track the force-deflection path during post-buckling. A range of 3D finite element models has been created using the ABAQUS software. Comparisons have been carried out between the proposed analytical model, finite element modelling and an existing theoretical model by Dharma (2007. Comparisons indicate that the proposed method is able to provide accurate predictions for Class 1 and Class 2 beams, and performs better than the existing Dharma model, especially for beams with high flange-to-web thickness ratios. A component-based model has been created on the basis of the analytical model, and will in due course be implemented in the software Vulcan for global structural fire analysis.

  17. Mechanics of Re-Torquing in Bolted Flange Connections

    Science.gov (United States)

    Gordon, Ali P.; Drilling Brian; Weichman, Kyle; Kammerer, Catherine; Baldwin, Frank

    2010-01-01

    It has been widely accepted that the phenomenon of time-dependent loosening of flange connections is a strong consequence of the viscous nature of the compression seal material. Characterizing the coupled interaction between gasket creep and elastic bolt stiffness has been useful in predicting conditions that facilitate leakage. Prior advances on this sub-class of bolted joints has lead to the development of (1) constitutive models for elastomerics, (2) initial tightening strategies, (3) etc. The effect of re-torque, which is a major consideration for typical bolted flange seals used on the Space Shuttle fleet, has not been fully characterized, however. The current study presents a systematic approach to characterizing bolted joint behavior as the consequence of sequentially applied torques. Based on exprimenta1 and numerical results, the optimal re-torquing parameters have been identified that allow for the negligible load loss after pre-load application

  18. Pengaruh Keputusan Bauran Promosi Terhadap Pengambilan Keputusan Pembelian Nomor Perdana Telkom Flexi di Kota Banjarmasin

    Directory of Open Access Journals (Sweden)

    Sri Imelda

    2016-04-01

    Full Text Available This study aims to determine the infl uence of the promotion mix (advertising, personal  selling,  sales  promotion,  public  relations,  and  direct  marketing and  on-line  partial  and  simultaneous  decision  to  purchase  prime  numbers TELKOMFlexi in Banjarmasin city. This research was conducted using a survey method, which is carried out on 219  respondents  spread  across  fi ve  districts  in  the  city  of  Banjarmasin.  This is  a  descriptive  study  and  verifi cation.  Data  were  collected  by  distributing questionnaires,  interviews  and  document  searches,  while  the  method  of  data analysis is a data analysis using Structur Equetion Modelling (SEM. The results showed that the promotional mix consisting of: advertising, sales promotion, personal selling, do not have a signifi cant infl uence on the purchase decision  process  TelkomFlexi  Prime  Numbers  in  Banjarmasin  city,  while  the variables that are signifi cant public relations and direct marketing to the buying decision process Prime Numbers TelkomFlexi in the city of Banjarmasin. Keyword :Promotional Mix, Decision Making, Prime Numbers TelkomFlexi.

  19. Pengaruh Keputusan Bauran Promosi Terhadap Pengambilan Keputusan Pembelian Nomor Perdana Telkom Flexi di Kota Banjarmasin

    Directory of Open Access Journals (Sweden)

    Sri Imelda

    2016-04-01

    Full Text Available This study aims to determine the infl uence of the promotion mix (advertising, personal  selling,  sales  promotion,  public  relations,  and  direct  marketing and  on-line  partial  and  simultaneous  decision  to  purchase  prime  numbers TELKOMFlexi in Banjarmasin city. This research was conducted using a survey method, which is carried out on 219  respondents  spread  across  fi ve  districts  in  the  city  of  Banjarmasin.  This is  a  descriptive  study  and  verifi cation.  Data  were  collected  by  distributing questionnaires,  interviews  and  document  searches,  while  the  method  of  data analysis is a data analysis using Structur Equetion Modelling (SEM. The results showed that the promotional mix consisting of: advertising, sales promotion, personal selling, do not have a signifi cant infl uence on the purchase decision  process  TelkomFlexi  Prime  Numbers  in  Banjarmasin  city,  while  the variables that are signifi cant public relations and direct marketing to the buying decision process Prime Numbers TelkomFlexi in the city of Banjarmasin. Keyword :Promotional Mix, Decision Making, Prime Numbers TelkomFlexi.

  20. Ensayos de flexión dinámica sobre vigas fisuradas

    OpenAIRE

    Benito López, Gonzalo

    2009-01-01

    Los objetivos perseguidos por el estudio son los siguientes: · Analizar el ensayo de flexión dinámica en tres puntos sobre probetas fisuradas. Con tal fin se aplicará un modelo simplificado basado en la dinámica de vigas de Timoshenko donde se considerarán las posibles pérdidas de contacto entre probeta y apoyos. · Desarrollar e implementar en MATLAB un algoritmo de cálculo que permita resolver el problema de forma eficiente, donde necesariamente se calcularán las frecuen...

  1. Medición de la flexión dorsal del tobillo en bipedestación y carga

    National Research Council Canada - National Science Library

    García Campos, J; Ortega Díaz, E; Cantó Núñez, L; Martos Medina, D

    2009-01-01

    ... musculoesqueléticas como dolor de antepié, fascitis plantar, fracturas de estrés de escafoides, tendinopatía aquilea y rotuliana, esguinces de tobillo y lesiones de sobreuso en jugadores de fútbol 2 . Por ello, las técnicas de medición clínicas que valoren la flexión dorsal del tobillo deben ser fiables y válidas. Tradicionalmente las medidas de flexión dorsal del ...

  2. Development and test of a rectangular CERN ConFlat-type flange

    CERN Document Server

    Miarnau Marin, Ana; Veness, Raymond

    2015-01-01

    Standard circular ConFlat® (CF) flanges are widely used in industry due to their high sealing reliability after being subjected to a bakeout process. The Beam Gas Ionisation (BGI) instrument for the CERN Proton Synchrotron accelerator will require a CF-like rectangular sealing system. Although rectangular CF-type flanges with plastically deforming metal seals have been used, no published designs with validated tests for bakeout under UHV conditions are available. Existing circular CERN CF flanges were compared and a design for a rectangular CF flange was proposed. Two prototypes were manufactured along with copper gaskets. The flanges and gaskets were cleaned and prepared for extensive vacuum testing after bakeout cycles up to 350 °C. This paper summarises the design, analysis and manufacturing process and describes the testing procedures and results. Additionally, the limitations when designing a flange of any shape were explored.

  3. Modelling of flexi-coil springs with rubber-metal pads in a locomotive running gear

    Directory of Open Access Journals (Sweden)

    Michálek T.

    2015-06-01

    Full Text Available Nowadays, flexi-coil springs are commonly used in the secondary suspension stage of railway vehicles. Lateral stiffness of these springs is influenced by means of their design parameters (number of coils, height, mean diameter of coils, wire diameter etc. and it is often suitable to modify this stiffness in such way, that the suspension shows various lateral stiffness in different directions (i.e., longitudinally vs. laterally in the vehicle-related coordinate system. Therefore, these springs are often supplemented with some kind of rubber-metal pads. This paper deals with modelling of the flexi-coil springs supplemented with tilting rubber-metal tilting pads applied in running gear of an electric locomotive as well as with consequences of application of that solution of the secondary suspension from the point of view of the vehicle running performance. This analysis is performed by means of multi-body simulations and the description of lateral stiffness characteristics of the springs is based on results of experimental measurements of these characteristics performed in heavy laboratories of the Jan Perner Transport Faculty of the University of Pardubice.

  4. Research on Flange Spread of H-Beam on Universal Mill

    Institute of Scientific and Technical Information of China (English)

    XU Xu-Dong; BAI Jin-lan; WANG Bing-xin; LIU Xiang-hua; WU Di

    2006-01-01

    The deformation process of H-beams was simulated by explicit dynamic FEM, and the influence of deformation parameters on the spread of rolling piece was obtained. The results show that the flange width, elongation ratio between flange and web and flange thickness are the major influencing factors on the spread of rolling piece, and the inclination and diameter of vertical roll together with web inner width can also influence to some extent on the spread of rolling piece.

  5. Variable volume combustor with aerodynamic fuel flanges for nozzle mounting

    Energy Technology Data Exchange (ETDEWEB)

    McConnaughhay, Johnie Franklin; Keener, Christopher Paul; Johnson, Thomas Edward; Ostebee, Heath Michael

    2016-09-20

    The present application provides a combustor for use with a gas turbine engine. The combustor may include a number of micro-mixer fuel nozzles and a fuel injection system for providing a flow of fuel to the micro-mixer fuel nozzles. The fuel injection system may include a number of support struts supporting the fuel nozzles and for providing the flow of fuel therethrough. The fuel injection system also may include a number of aerodynamic fuel flanges connecting the micro-mixer fuel nozzles and the support struts.

  6. Comparative Modal Analysis of Gasketed and Nongasketed Bolted Flanged Pipe Joints: FEA Approach

    Directory of Open Access Journals (Sweden)

    Muhammad Abid

    2012-01-01

    Full Text Available It is widely known that resonance can quickly lead to failure in vibrating bolted flanged pipe joints. Condition monitoring is performed time to time in some industries for smooth operation of a system, whereas mostly trial-and-error tests are performed to control vibration. During all this process, the inherent design problems are not considered. A bolted flange joint in piping system is not a simple problem, being the combination of flange, gasket, bolts, and washers. The success of a bolted flanged pipe joint is defined by the “static mode of load” in the joint. However, it has been recognized that a “dynamic mode of load” governs in a gasketed bolted flanged pipe joint, which leads to its failure due to flange rotation, providing flange yielding, fatigue of bolts, and gasket crushing. This paper presents results of detailed 3D finite element and mathematical modal analysis under bolt up to determine natural frequencies and mode shapes of gasketed flanged joints with and without raised face in comparison to the nongasketed flange joint.

  7. Visualization of cavitation in flanged poppet valve; Tsubatsuki popetto bennai no cavitation no kashika

    Energy Technology Data Exchange (ETDEWEB)

    Iijima, A.; Tsukiji, T. [Ashikaga Institute of Technology, Tochigi (Japan); Sumita, T. [Tokimec Inc., Tokyo (Japan)

    1999-01-15

    Only half-cut models are dealt with in reports made available so far about experiments on the visualization of cavitation in what is called a flanged poppet valve, which is a valve whose cone-shaped poppet is provided with flanges at its end and periphery for reduction in fluid force. In the present report, a valve is drilled from three directions in an experiment for visualizing flows near the poppet valve flanges, which is for three-dimensional model visualization. The shapes of the poppet valve flanges are changed in various ways for the study of cavitation generation limits. (translated by NEDO)

  8. Three Dimensional FE Analysis on Flange Bending for TC4 Alloy during Shear Spinning

    Institute of Scientific and Technical Information of China (English)

    Xinyu LU; Shihong ZHANG; Hongliang HOU; Jizhen LI; Lixin ZHOU; Zhiqiang LI

    2006-01-01

    In this paper, the 3D elastic-plastic simulation was carried out by using finite element (FE) code according to the phenomena of flange keeping straight, bending towards headstock and bending towards tailstock in the shear spinning experiments for TC4 alloy. The simulation results for the three kinds of deformations of the flange agree well with the experimental results. So it is possible to explain the reason of flange bending by analyzing the strain vectors in the flange for the three kinds of deformation, which shows that it is important to apply the FE simulation technology for predicting the defects and optimizing the spinning process of TC4 alloys.

  9. The Influence Of Infinite Impedance Flanges On The Electromagnetic Field Of A Plane Waveguide

    Directory of Open Access Journals (Sweden)

    Jean-François D. Essiben

    2015-02-01

    Full Text Available The problem of analysis of the electromagnetic field behaviour from the open end of the parallel-plate waveguide with infinite impedance flanges is theoretically investigated. The case with the absence of impedance flanges is also considered. Furthermore, we take into account particular features of the waveguide edges. The effects of the impedance flanges and the edge features on the electromagnetic field and the radiation patterns of a plane waveguide with flanges are demonstrated. The method of moments (MoM technique which was used to solve the integral equations is presented along with the numerical results.

  10. Interfacial shear behavior of composite flanged concrete beams

    Directory of Open Access Journals (Sweden)

    Moataz Awry Mahmoud

    2014-08-01

    Full Text Available Composite concrete decks are commonly used in the construction of highway bridges due to their rapid constructability. The interfacial shear transfer between the top slab and the supporting beams is of great significance to the overall deck load carrying capacity and performance. Interfacial shear capacity is directly influenced by the distribution and the percentage of shear connectors. Research and design guidelines suggest the use of two different approaches to quantify the required interfacial shear strength, namely based on the maximum compressive forces in the flange at mid span or the maximum shear flow at the supports. This paper investigates the performance of flanged reinforced concrete composite beams with different shear connector’s distribution and reinforcing ratios. The study incorporated both experimental and analytical programs for beams. Key experimental findings suggest that concentrating the connectors at the vicinity of the supports enhances the ductility of the beam. The paper proposes a simple and straight forward approach to estimate the interfacial shear capacity that was proven to give good correlation with the experimental results and selected code provisions. The paper presents a method to predict the horizontal shear force between precast beams and cast in-situ slabs.

  11. Emerging Ideas for Innovation in Indigenous Education: A Research Synthesis of Indigenous Educative Roles in Mainstream and Flexi Schools

    Science.gov (United States)

    Shay, Marnee

    2017-01-01

    The Indigenous education agenda in Australia remains focused on mainstream schooling contexts. Although overlooked in Indigenous education discourse, flexi schools appear to be engaging with disproportionately high numbers of Indigenous students and staff. The educative roles of Indigenous peoples in broader Indigenous education discourse are…

  12. 76 FR 8773 - Forged Stainless Steel Flanges From India and Taiwan

    Science.gov (United States)

    2011-02-15

    ... From the Federal Register Online via the Government Publishing Office INTERNATIONAL TRADE COMMISSION Forged Stainless Steel Flanges From India and Taiwan AGENCY: United States International Trade... steel flanges from India and Taiwan would be likely to lead to continuation or recurrence of...

  13. Flange joint system for SRF cavities utilizing high force spring clamps for low particle generation

    Energy Technology Data Exchange (ETDEWEB)

    None

    2017-09-05

    A flange joint system for SRF cavities. The flange joint system includes a set of high force spring clamps that produce high force on the simple flanges of Superconducting Radio Frequency (SRF) cavities to squeeze conventional metallic seals. The system establishes the required vacuum and RF-tight seal with minimum particle contamination to the inside of the cavity assembly. The spring clamps are designed to stay within their elastic range while being forced open enough to mount over the flange pair. Upon release, the clamps have enough force to plastically deform metallic seal surfaces and continue to a new equilibrium sprung dimension where the flanges remain held against one another with enough preload such that normal handling will not break the seal.

  14. Specifying and testing weld neck flanges for better quality

    Energy Technology Data Exchange (ETDEWEB)

    Weirich, A.B. [Saudi Aramco, Dhahran (Saudi Arabia)

    1996-07-01

    Field failures and persistent defects have impelled users to demand improved reliability in weld neck flanges. This paper explains why and how to specify for better quality. The answers are straightforward: Specify clearly -- Quality begins with improved raw stock, is assured by good manufacturing practices, and is warranted by appropriate quality controls. Be reasonable, specifications must be commercially viable in today`s competitive environment. Inspect the merchandise: Quality cannot be assured without effective enforcement. To think otherwise is unrealistic, regardless how good the procurement specifications may be. Review purchasing policies: When suppliers of quality products are identified, restricted purchases should be instituted. Quicker deliveries and a reliable supply of good quality product are assured as manufacturers maintain upgraded inventories in anticipation of repeat business.

  15. Effects of the functional practice of Flexi-bar on the effect of dance sport teaching%Flexi-bar振动杆功能性练习对体育舞蹈教学效果的影响

    Institute of Scientific and Technical Information of China (English)

    何跃春; 邝悦权; 张秀丽

    2015-01-01

    Based on functional movement screening (FMS) and Flexi-bar practice, the authors designed and imple-mented a 12-week teaching experiment project by basing their experiment subject on 28 university students special-izing in dance sport, and revealed the following findings: 1) the individualized teaching project based on functional movement screening and Flexi-bar practice can not only significantly increase undergraduates' total scores for FMS, but also enhance their dance sport specific technical movement quality and comprehensive performance; 2) under-graduate dance sport beginners' total scores for FMS are significant correlative with their comprehensive scores for Latin dance (Rumba) specific movement (posture maintaining and quick hip twisting abilities) and standard dance (Waltz). The authors proposed to introduce functional practice means such as body functional movement diagnosis conception and Flexi-bar into dance sport specific teaching in sports universities, so as to enhance teaching effect and efficiency, reduce sports injury, improve students' self diagnosis ability and performance, and cultivate under-graduates' core competitive strength for social employment.%基于功能性动作筛查(FMS)及Flexi-bar练习,以28名体育舞蹈专项大学生为实验对象,设计并实施为期12周的教学实验方案.研究结果表明:第一,基于功能性动作筛查和FLexi-bar练习的个性化教学方案既能显著提高本科生FMS总分,也可以提高体育舞蹈专项技术动作质量和综合表现力;第二,本科生体育舞蹈初学者FMS总分与拉丁舞(伦巴)专项动作(姿态保持和快速扭胯能力)及标准舞(华尔兹)综合评分显著相关.建议体育院校的体育舞蹈专项教学引入身体功能动作诊断理念及FLexi-bar等功能性练习手段,以提高教学效果和效率,减少运动损伤,提高学生自我诊断能力和水平,培养体育本科生社会就业的核心竞争力.

  16. Využití best practice a lessons learned při zpracování typového projektu Flexi Office

    OpenAIRE

    Bieliková, Mária

    2012-01-01

    The aim of the master's thesis "Making use of best practice and lessons learned while processing the standard project Flexi Office" is to streamline project management in the selected company by analysing the errors and positives from completed project and processing the standard project for Flexi Office. Theoretical and methodological part describes the project management aspects, methods of planning and project evaluation. The practical part describes the characteristics of the examined com...

  17. Pulsating-flow measurement with an orifice flange

    Science.gov (United States)

    Bossart, L. M.

    1981-05-01

    A measurement problem encountered during instrumentation of a geothermal air drilling operation on the Baca Ranch in the Jemez Mountains in New Mexico was how to measure the flow of ammonia water solution injected into the air line. The pump that develops the pressure in the ammonia line is not a positive displacement pump, therefore, counting pump strokes does not determine the number of gal/min of ammonia flow. The flow was measured using an orifice flange differential pressure technique but, the range of flow measured, exceeded the 4:1 range ability of an orifice. A computer smoothing of the differential pressure and the line pressure together with a scaling factor, determined by the shape of the raw differential pressure, provided a smoothing of the flow data which was checked against the actual flow over a long time period to determine the volume of solution injected into the system per hour. An instantaneous reading of ammonia flow was thereby determined. It showed small variations in corrosion rate measured in the standpipe that may have been caused by a momentary variation in the flow of ammonia solution.

  18. Modeling of the plastic flow kinematics in the forming process of the lightweight flange corrugation

    Directory of Open Access Journals (Sweden)

    I. V. Fomenko

    2012-01-01

    Full Text Available The determination of the forming maximum possibilities of the flange corrugation by stretching with a free movement of the billets end in the rigid sectional matrices detachable by the flexible filler.

  19. FlexiChip package: an universal microarray with a dedicated analysis software for high-thoughput SNPs detection linked to anti-malarial drug resistance

    Directory of Open Access Journals (Sweden)

    Dondorp Arjen M

    2009-10-01

    Full Text Available Abstract Background A number of molecular tools have been developed to monitor the emergence and spread of anti-malarial drug resistance to Plasmodium falciparum. One of the major obstacles to the wider implementation of these tools is the absence of practical methods enabling high throughput analysis. Here a new Zip-code array is described, called FlexiChip, linked to a dedicated software program, which largely overcomes this problem. Methods Previously published microarray probes detecting single-nucleotide polymorphisms (SNP associated with parasite resistance to anti-malarial drugs (ResMalChip were adapted for a universal microarray FlexiChip format. To evaluate the overall sensitivity of the FlexiChip package (microarray + software, the results of FlexiChip were compared to ResMalChip microarray, using the same extension probes and with the same PCR products. In both cases, sequence results were used as gold standard to calculate sensitivity and specificity. FlexiChip results obtained with a set of field isolates were then compared to those assessed in an independent reference laboratory. Results The FlexiChip package gave results identical to the ResMalChip results in 92.7% of samples (kappa coefficient 0.8491, with a standard error 0.021 and had a sensitivity of 95.88% and a specificity of 97.68% compared to the sequencing as the reference method. Moreover the method performed well compared to the results obtained in the reference laboratories, with 99.7% of identical results (kappa coefficient 0.9923, S.E. 0.0523. Conclusion Microarrays could be employed to monitor P. falciparum drug resistance markers with greater cost effectiveness and the possibility for high throughput analysis. The FlexiChip package is a promising tool for use in poor resource settings of malaria endemic countries.

  20. Resistencia a la flexión de la guadua Agustifolia kunt a escala natural.

    Directory of Open Access Journals (Sweden)

    González C Eugenia

    2002-12-01

    Full Text Available En los laboratorios de productos forestales y en el de construcciones rurales de la Universidad Nacional de Colombia Sede Medellín, se realizaron dieciocho (18 ensayos de flexión estática a escala natural con luces entre 2,50 y 3,50 metros de la sobrebasa del elemento, las cuales son las más utilizadas y recomendadas para este tipo de esfuerzo, donde el material seleccionado corresponde a la especie Guadua (Angustifolia kunth, colectada en la Finca Cotové ubicada en Santafé de Antioquia y cuya zona de vida corresponde a un bosque seco tropical (bs-t. Las pruebas fueron realizadas basadas en las Normas COPANT 455 (1972 para selección y colección de muestras de madera, 459 acondicionamiento de maderas destinadas a ensayos físicos y mecánicos y 460 para la determinación del contenido de humedad y las normas de la American Society for Testing and Materials, 1975. Estas normas son empleadas para maderas macizas, por lo tanto debieron ser ajustadas a las condiciones particulares de la guadua circular hueca de acuerdo a la metodología utilizada por González y Díaz 1992. Este trabajo presenta los resultados de las ecuaciones de diseños para elementos de guadua sometidos a flexión estática, los valores de esfuerzos unitarios en el límite proporcional (RLP, módulo de elasticidad (MOE y el esfuerzo de rotura (MOR, los cuales fueron comparados con los valores obtenidos por González y Días, 1.992, cuyos ensayos fueron hechos bajo probetas, obteniéndose variaciones menores del 7% entre estos, y a la vez se hallaron unos coeficientes de varianza con rangos entre el 20 y el 30% para los parámetros establecidos los cuales fueron considerados aceptables. Para la obtención de los parámetros anteriores se tuvieron en cuenta aspectos como la longitud, diámetro promedio, espesor de las paredes medidas en los extremos, el contenido de humedad en base seca y la carga de falla del elemento. Finalmente, se recomienda utilizar las ecuaciones de

  1. Effect of tip flange on tip leakage flow of small axial flow fans

    Science.gov (United States)

    Zhang, Li; Jin, Yingzi; Jin, Yuzhen

    2014-02-01

    Aerodynamic performance of an axial flow fan is closely related to its tip clearance leakage flow. In this paper, the hot-wire anemometer is used to measure the three dimensional mean velocity near the blade tips. Moreover, the filtered N-S equations with finite volume method and RNG k-ɛ turbulence model are adopted to carry out the steady simulation calculation of several fans that differ only in tip flange shape and number. The large eddy simulation and the FW-H noise models are adopted to carry out the unsteady numerical calculation and aerodynamic noise prediction. The results of simulation calculation agree roughly with that of tests, which proves the numerical calculation method is feasible.The effects of tip flange shapes and numbers on the blade tip vortex structure and the characteristics are analyzed. The results show that tip flange of the fan has a certain influence on the characteristics of the fan. The maximum efficiencies for the fans with tip flanges are shifted towards partial flow with respect to the design point of the datum fan. Furthermore, the noise characteristics for the fans with tip flanges have become more deteriorated than that for the datum fan. Tip flange contributes to forming tip vortex shedding and the effect of the half-cylinder tip flange on tip vortex shedding is obvious. There is a distinct relationship between the characteristics of the fan and tip vortex shedding. The research results provide the profitable reference for the internal flow mechanism of the performance optimization of small axial flow fans.

  2. Passive IR flexi-scope with two spectral colors for household screening of gastrointestinal disorders

    Science.gov (United States)

    Byrd, Kenneth; Szu, Harold

    2006-04-01

    According to our generalized Shannon Sampling Theorem of developmental system biology, we should increase the sampling frequency of the passive Infrared (IR) spectrum ratio test, (I 8~12mm / I 3~5mm). This procedure proved to be effective in DCIS using the satellite-grade IR spectrum cameras for an early developmental symptom of the "angiogenesis" effect. Thus, we propose to augment the annual hospital checkup of, or biannual Colonoscopy, with an inexpensive non-imaging IR-Flexi-scope intensity measurement device which could be conducted regularly at a household residence without the need doctoral expertise or a data basis system. The only required component would be a smart PC, which would be used to compute the degree of thermal activities through the IR spectral ratio. It will also be used to keep track of the record and send to the medical center for tele-diagnosis. For the purpose of household screening, we propose to have two integrated passive IR probes of dual-IR-color spectrum inserted into the body via the IR fiber-optic device. In order to extract the percentage of malignancy, based on the ratio of dual color IR measurements, the key enabler is the unsupervised learning algorithm in the sense of the Duda & Hart Unlabelled Data Classifier without lookup table exemplars. This learning methodology belongs to the Natural Intelligence (NI) of the human brain, which can effortlessly reduce the redundancy of pair inputs and thereby enhance the Signal to Noise Ratio (SNR) better than any single sensor for the salient feature extraction. Thus, we can go beyond a closed data basis AI expert system to tailor to the individual ground truth without the biases of the prior knowledge.

  3. Cierre quirúrgico en flexión versus extensión en artroplastias totales de rodilla

    OpenAIRE

    Hernández Vaquero, Daniel; Fernández Fernández, J. M.; Suárez Vázquez, A.

    1999-01-01

    Se ha realizado un estudio prospectivo de 44 pacientes con gonartrosis primaria que fueron intervenidos con artroplastia total de rodilla con el objeto de determinar las diferencies en cuanto a la movilidad final de la rodilla dependiendo del cierre quirúrgico en flexión o en extensión. Se formaron dos grupos con similares características de homogeneidad respecto al sexo, edad, peso corporal y arco de movilidad previa, no existiendo diferencies significativas entre los grupos en la valoración...

  4. Design, analysis, and testing of a metal matrix composite web/flange intersection

    Science.gov (United States)

    Biggers, S. B.; Knight, N. F., Jr.; Moran, S. G.; Olliffe, R.

    1992-01-01

    An experimental and analytical program to study the local design details of a typical T-shaped web/flange intersection made from a metal matrix composite is described. Loads creating flange bending were applied to specimens having different designs and boundary conditions. Finite element analyses were conducted on models of the test specimens to predict the structural response. The analyses correctly predict failure load, mode, and location in the fillet material in the intersection region of the web and the flange when specimen quality is good. The test program shows the importance of fabrication quality in the intersection region. The full-scale test program that led to the investigation of this local detail is also described.

  5. Do flexible acrylic resin lingual flanges improve retention of mandibular complete dentures?

    Science.gov (United States)

    Ahmed Elmorsy, Ayman Elmorsy; Ahmed Ibraheem, Eman Mostafa; Ela, Alaa Aboul; Fahmy, Ahmed; Nassani, Mohammad Zakaria

    2015-01-01

    The aim of this study was to compare the retention of conventional mandibular complete dentures with that of mandibular complete dentures having lingual flanges constructed with flexible acrylic resin "Versacryl." The study sample comprised 10 completely edentulous patients. Each patient received one maxillary complete denture and two mandibular complete dentures. One mandibular denture was made of conventional heat-cured acrylic resin and the other had its lingual flanges made of flexible acrylic resin Versacryl. Digital force-meter was used to measure retention of mandibular dentures at delivery and at 2 weeks and 45 days following denture insertion. The statistical analysis showed that at baseline and follow-up appointments, retention of mandibular complete dentures with flexible lingual flanges was significantly greater than retention of conventional mandibular dentures (P dentures, retention of dentures increased significantly over the follow-up period (P complete dentures improved denture retention.

  6. Forming limits in the hole-flanging process by coupled and uncoupled damage models

    Science.gov (United States)

    Kacem, A.; Jégat, A.; Krichen, A.; Manach, P. Y.

    2013-12-01

    The aim of this work is to identify the limits of the hole-flanging process under different conditions. A 3D finite element model was developed to predict failure in hole-flanging process for sheet aluminium alloys. The Gurson-Tvergaard-Needleman (GTN) coupled damage model and the Bao-Wierzbicki (BW) uncoupled damage model were used. The parameters of both coupled and uncoupled models were identified by inverse analysis based on uniaxial tensile test. Experiments were conducted to analyse the types of failure that appear during the process. Numerical results were compared with experimental datas to check the validity of both models in predicting failure during the hole-flanging process. The comparative study showed that the GTN model predicts more accurately almost all types of failure while fracture occurrence can be only predicted by the BW model.

  7. PIV Measurements of Flows around the Wind Turbines with a Flanged-Diffuser Shroud

    Institute of Scientific and Technical Information of China (English)

    Kazuhiko Toshimitsu; Koutarou Nishikawa; Wataru Haruki; Shinichi Oono; Manabu Takao; Yuji Ohya

    2008-01-01

    The wind turbines with a flanged-diffuser shroud -so called "wind lens turbine"- are developed as one of high performance wind turbines by Ohya et al. In order to investigate the flow characteristics and flow acceleration, the paper presents the flow velocity measurements of a long-type and a compact-type wind turbines with a flanged-diffuser shroud by particle image velocimetry. In the case of the long type wind turbine, the velocity vec-tors of the inner flow field of the diffuser for turbine blades rotating and no blades rotating are presented at Rey-nolds number, 0.9x105. Furthermore the flow fields between with and without rotating are compared. Through the PIV measurement results, one can realize that the turbine blades rotating affects as suppress the disturbance and the flow separation near the inner wall of the diffuser. The time average velocity vectors are made on the av-erage of the instantaneous velocity data. There are two large vortices in downstream region of the diffuser. One vortex behind the flange acts as suck in wind to the diffuser and raise the inlet flow velocity. Another large vortex appears in downstream. It might be act as blockage vortex of main flow. The large blockage vortex is not clear in the instantaneous velocity vectors, however it exists clearly in the time average flow field. The flow field around the wind turbine with a compact-type flanged-diffuser shroud is also investigated. The flow pattern behind the flange of the compact-type turbine is the same as the long-type one. It means that the effect of flow acceleration is caused by the unsteady vortices behind the flange. The comparison with CFD and PIV results of meridional time-average streamlines after the compact-type diffuser is also presented.

  8. Definitive guiding flange prosthesis: A definitive approach in segmental mandibulectomy defect

    Directory of Open Access Journals (Sweden)

    Sumanth Babu

    2016-01-01

    Full Text Available Mandibular discontinuity defects following a segmental mandibulectomy defects present a major challenge to the rehabilitation team. With no immediate intervention to rehabilitate the patient, definitive mandibular guidance prostheses with a metal guiding flange and acrylic teeth on the resected side can be used successfully to stabilize the occlusion and correct the deviation. The present case report describes the prosthodontic rehabilitation of a patient with a segmental mandibulectomy using a mandibular prosthesis with a metal guide flange and a maxillary stabilizing metal framework.

  9. Arrangement for connecting a fiber-reinforced plastic pipe to a stainless steel flange

    Science.gov (United States)

    Allais, Arnaud; Hoffmann, Ernst

    2008-02-05

    Arrangement for connecting a fiber-reinforced plastic pipe (18) to a stainless steel flange (12, 16), in which the end of the fiber-reinforced plastic pipe (18) is accommodated in a ring-shaped groove (12a, 16a) in the flange (12, 16), the groove conforming to the dimensions of the fiber-reinforced plastic pipe (18), where the gap remaining between the end of the fiber-reinforced plastic pipe (18) and the ring-shaped groove (12a, 16a) is filled with a sealant (19).

  10. Comparing the effectiveness of copper intrauterine devices available in Canada. Is FlexiT non-inferior to NovaT when inserted immediately after first-trimester abortion? Study protocol for a randomized controlled trial

    Directory of Open Access Journals (Sweden)

    Norman Wendy V

    2012-08-01

    Full Text Available Abstract Background We describe the rationale and protocol for a randomized noninferiority controlled trial (RCT to determine if the Flexi-T380(+ copper intrauterine contraceptive device (IUD is comparable in terms of effectiveness and expulsion rates to the most common Canadian IUD currently in use, NovaT-200, when placed immediately after a first-trimester abortion. Methods/Design Consenting women choosing to use an IUD after an abortion for a pregnancy of less than 12 weeks of gestation will be randomized to device-type groups to receive immediate post-abortion placement of either a Flexi-T380(+ IUD, a device for which no current evidence on expulsion or effectiveness rates is available, or the Nova-T200 IUD, the only other brand of copper IUD available in Canada at the time of study initiation. The primary outcome measure is IUD expulsion rate at 1 year. Secondary outcomes include: pregnancy rate, method continuation rate, complication rates (infection, perforation, and satisfaction with contraceptive method. A non-intervention group of consenting women choosing a range of other post-abortion contraception methods, including no contraception, will be included for comparison of secondary outcomes. Web-based contraception satisfaction questionnaires, clinical records, and government-linked health administrative databases will be used to assess primary and secondary outcomes. Discussion The RCT design, combined with access to clinical records at all provincial abortion clinics, and to information in provincial single-payer linked administrative health databases, birth registry, and hospital records, offers a unique opportunity to determine if a novel IUD has a comparable expulsion rate to that of the current standard IUD in Canada, in addition to the first opportunity to determine pregnancy rate and method satisfaction at 1 year post-abortion for women choosing a range of post-abortion contraceptive options. We highlight considerations of

  11. Management of Necrotizing Fasciitis and Fecal Peritonitis following Ostomy Necrosis and Detachment by Using NPT and Flexi-Seal

    Directory of Open Access Journals (Sweden)

    Fahri Yetışır

    2015-01-01

    Full Text Available Management of necrotizing fasciitis and severe faecal peritonitis following ostomy in elderly patient with comorbid disease is challenging. We would like to report management of frozen Open Abdomen (OA with colonic fistula following ostomy necrosis and detachment in an elderly patient with comorbid disease and malignancy. 78-year-old woman with high stage rectum carcinoma was admitted to emergency department and underwent operation for severe peritonitis and sigmoid colonic perforation. Loop sigmoidostomy was performed. At postoperative 15th day, she was transferred to our clinic with necrotizing fasciitis and severe faecal peritonitis due to ostomy necrosis and detachment. Enteric effluent was removed from the OA wound by using the Flexi-Seal Fecal Management System (FMS (ConvaTec and pesser tube in deeply located colonic fistula in conjunction with Negative Pressure Therapy (NPT. Maturation of ostomy was facilitated by using second NPT on ostomy side. After source control, delayed abdominal closure was achieved by skin flap approximation.

  12. SU-E-T-325: Dosimetric Impact Due to FlexiShield in Electronic Brachytherapy (eBx) of Breast IORT: A Phantom Study

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Y; Huynh, J; Ley, M; Gonzalez, V [University of Arizona, Tucson, AZ (United States)

    2015-06-15

    Purpose: To evaluate dosimetric change of eBx plan due to Flexishield. Methods: To simulate a clinically difficult case (skin spacing < 1 cm and touching chest wall), prostheses breast tissue phantom overlaid Xoft spherical balloon applicator. To minimize significant metal streak artifact, megavoltage CT (MVCT) scan was acquired using helical TomoTherapy HiART. Two sets of MVCT images were taken with/without FlexiShield for 15 cases: 4 for small (3–4 cm), 4 for medium (4–5 cm) and 7 for large (5–6 cm) balloon. Total 30 MVCT scans were obtained with 50 % contrast to improve image contrast of balloon relative to breast tissue phantom. Balloon deformation was measured in anterior-posterior (AP) and lateral (LAT) dimensions in the middle of balloon. Skin spacing was also evaluated. Treatment plan was made based on each MVCT scan and two balloon surface doses (AP and LAT directions) and skin dose were compared between plans with/without FlexiShield. Results: The balloon was deformed due to pressure from both FlexiShield (skin side) and FlexiShield mini (chest wall side). Mean ± standard deviation (maximum) value was 1.5 ± 1.0 mm (3.3 mm) for AP compression and 0.4 ± 0.3 mm (1.1 mm) for LAT expansion. Balloon surface dose was increased by 1.8 ± 1.2 Gy (4.9 Gy) at AP point and decreased by 0.4 ± 0.4 Gy (1.3 Gy) at LAT point. Skin spacing was constantly reduced by 1.1 ± 0.8 mm (3 mm). Skin surface dose was increased by 1.5 ± 0.8 Gy (3.3 Gy) and its relative increase was 17.9 ± 9.3% (39.6%). Conclusion: FlexiShield deforms the balloon and reduces skin spacing, thereby resulting in higher dose in AP direction, lower dose in LAT direction, and elevated skin dose compared to the plan without FlexiShield. In the clinic, this balloon deformation and corresponding dose variation should be considered.

  13. Carbon steel flanges and welds evaluation on HF-alkylation unit

    Energy Technology Data Exchange (ETDEWEB)

    Peiiuela, L.; Chirinos, J. [PDVSA Manufacture y Mercadeo, Judibana (Venezuela). Centro de Refinacion Paraguana

    1999-11-01

    In 1995, there were two failures in the 20,000 BPD HF Alky unit at the Amuay Refinery causing a shutdown of the unit. The failures occurred in one flange and one weld in the depropanizer charge carbon steel pipe, containing propane, isobutane and anhydrous hydrofluoric acid at 190 F (88 C) and 321psig (22.5 Kg/cm{sup 2}). Examination showed severe uniform corrosion at the inside surface of the flange while the adjacent elbow showed minimal corrosion loss. The other failure showed preferential attack in the weld without corrosion loss in the pipe components. A complete evaluation of the Alky plant was necessary to identify other lines in similar conditions that could cause future emergency shutdown of the unit. An extensive on stream inspection program was performed on critical lines of the unit. This paper summarizes the results and conclusions of this evaluation.

  14. LOFT reactor vessel 290/sup 0/ downcomer stalk instrument penetration flange stress analysis

    Energy Technology Data Exchange (ETDEWEB)

    Finicle, D.P.

    1978-06-06

    The LOFT Reactor Vessel 290/sup 0/ Downcomer Stalk Instrument Penetration Flange Stress Analysis has been completed using normal operational and blowdown loading. A linear elastic analysis was completed using simplified hand analysis techniques. The analysis was in accordance with the 1977 ASME Boiler and Pressure Vessel Code, Section III, for a Class 1 component. Loading included internal pressure, bolt preload, and thermal gradients due to normal operating and blowdown.

  15. Mechanical Properties of Two Kinds of New Cold-Formed Flange-Closed Welding Section Members

    Institute of Scientific and Technical Information of China (English)

    WU Sheng; ZHANG Hou; WANG Wei

    2011-01-01

    The hollow flange beam (HFB) is a unique cold-formed steel section developed in Australia for use as a flexural member.It's a particular cross section with two torsion rigid closed triangular flanges and a comparatively flexible web,and it is a type of high efficient cross section.This paper presents two kinds of new cold-formed flange-closed welding sections named HF1 and HF2 according to different section component and parameters of HFB.Nonlinear finite element method has been adopted to investigate the mechanical properties such as buckling mode,deformation process,rigidity,ductility and correlation curve of two kinds of new section members which being subjected to axial compression,flexure,combined compression and bending.Systematical comparisons of the consumed steel quantities of per unit load carrying capacity between new section members and the same section dimensions of cold-formed C-section members have been carried out.Some conclusions can be drawn from above work that the new sections have some superior properties including higher load carrying capacity and section modulus,sufficient section stiffness,and difficult occurrence for the sub element local buckling.The new sections are suitable for bearing flexure,compression,combined compression and bending.The new sections' consumed steel quantities of per unit load carrying capacity are almost half as those of the same dimension C-section members'.The experimental investigation is carried out further on the new cold-formed flange-closed welding section members and can be used in the practical engineering.

  16. The mortality and response rate after FLANG regimen in patients with refractory/relapsed acute leukemia

    Directory of Open Access Journals (Sweden)

    Vali A Mehrzad

    2012-01-01

    Full Text Available Background: Oncologists today are greatly concerned about the treatment of relapsed/refractory acute leukemia. FLANG regimen, combination of novantron, cytarabine, fludarabine, and granulocyte-colony stimulating factor, has been used in treatment of refractory/relapsed acute leukemia since 1990s. The present study has evaluated mortality and response rate of this regimen. Materials and Methods: In this study, 25 patients with refractory/relapsed acute leukemia aged 15-55 years underwent FLANG regimen at Seyed-Al-Shohada Hospital, Isfahan, Iran during 2008-2009. One month later, bone marrow samples were taken to evaluate the responsiveness to treatment. Participants were followed for a year. The data was analyzed by student-t and chi-square tests, logistic, and Cox regression analysis, and Kaplan-Meier curves in SPSS 19. Results: Out of the 25 patients, 8 patients (32% had acute lymphoblastic leukemia (5 refractory and 3 relapsed cases and 17 subjects had acute myeloid leukemia (7 refractory and 10 relapsed cases. According to the bone marrow biopsies taken one month after FLANG regimen, 10 patients (40% had responded to treatment. Five patients of the 10 responders underwent successful bone marrow transplantation (BMT. On the other hand, 13 patients (52%, who had not entered the CR period, died during the follow-up. Logistic regression analysis did not reveal any significant associations between disease type and responsiveness to treatment. Conclusion: This study indicated higher rates of unresponsiveness to treatment while its mortality rate was comparable with other studies. Overall, according to limitations for BMT (as the only chance for cure in Iran, it seems that FLANG therapy is an acceptable choice for these patients.

  17. Reduction of the Impedance Created by the Insulated Vacuum Flanges in the PS Booster

    CERN Document Server

    Blas, A; Carli, Christian; Lacroix, C

    2000-01-01

    The original vacuum flange assembly in the PS Booster (PSB) was designed to present insulation at low frequency and conduction to the beam image current above 2 MHz. However, in order to satisfy the needs for the LHC, the RF harmonic in the PSB had to be changed from h=5 to h=1, leading to a reduction of the lowest accelerating frequency to 600 kHz. The RF component of the beam was therefore passing through the main resonance of these flanges giving a total (integrated around the ring) longitudinal coupling impedance of 1000 W at 750 kHz, taking into account some additional RF bypasses. The voltage generated by the beam current was coupling to various electronic devices which therefore had to be equipped with common-mode rejection circuits. After some non-essential insulated flanges had been replaced by conducting ones during the 1998-99 shutdown, the total impedance was lowered to about 200 ohms (still higher than the maximum value for h=5 which was 130 ohms). This was one of the improvements that made it po...

  18. Suitability of Indian Hot-Rolled Parallel Flange Sections for Use in Seismic Steel Moment Resisting Frames

    Directory of Open Access Journals (Sweden)

    Kulkarni Swati Ajay

    2012-04-01

    Full Text Available Use of parallel flange I beam sections is advantageous than tapered flange I beam sections due to, increased lateral stiffness, sections do not have sloping flanges and excessive material in web and easy to weld and bolt. Nowadays the hot rolled parallel flange, narrow parallel flange beams (NPB and wide parallel flange beams (WPB sections as per Indian standards, having yield stress, 300 MPa, 350 MPa and 410 MPa are being manufactured. Available range of these sections can be used for steel moment resisting frames (SMRF’s and prequalified connections as per AISC codes. When the cross section of a steel shape is subjected to large compressive stresses, the thin plates that make up the cross section may buckle before the full strength of the member is attained if the thin plates are too slender. This failure mode may be prevented by selecting suitable width-to-thickness ratios of component plates. In the present exercise, a suitability of NPB and WPB section for use in SMRF’s as per width-to-thickness limitations of AISC 341-2010 and AISC 341-2005 codal provisions is studied.

  19. Investigation of Residual Stresses and Distortion in Welded Pipe-Flange Joint of Different Classes

    Directory of Open Access Journals (Sweden)

    Muhammad Abid

    2012-10-01

    Full Text Available ABSTRACT: Pipe and flange joints are commonly used in petrochemical, nuclear and process industries. Commonly, welding is used to make these joints which produces residual stresses and distortions. These stresses have detrimental effects on the structural integrity and service performance of the welded pipe joints. The objective of this study is to investigate the residual stresses and distortions during Gas Metal Arc Welding of pipe of schedule 40, nominal diameter 200 mm with different ANSI flanges of class numbers 150, 300, 600, 900, 1500, and 2500. Welding parameters including: voltage, current and heat as inputs were selected based on the literature available. The behaviour of the flanges of different classes is also discussed. In addition, the finite element methodology presented, in this paper, can be helpful for developing welding procedures for a range of pipe flange welded joint sizes in order to control the residual stresses and deformations. This will lead to optimised performance during bolt up and operating conditions.ABSTRAK: Paip dan sambungan flan biasanya digunakan dalam industri petrokimia, nuklear dan proses. Kimpalan menghasilkan tegasan sisa dan herotan, yang memberikan kesan yang merbahaya ke atas integriti struktur dan prestasi servis sambungan kimpalan paip. Objektif kajian ini adalah untuk mengkaji tegasan sisa dan herotan ketika kimpalan arka logam gas paip berjadual 40, diameter nominal 200mm dengan flan ANSI yang berbeza kelas # 150, 300, 600, 900, 1500, dan 2500. Parameter kimpalan termasuklah; voltan, arus dan haba input yang dipilih berdasarkan literatur sediada. Kelakuan flan yang berbeza kelas telah dibincangkan. Kaedah elemen finit yang dibentangkan adalah berguna dalam membangunkan prosedur kimpalan bagi julat saiz kimpalan flan paip unutk mengawal tegasan sisa dan canggaan i.e. bagi mengoptimakan prestasi ketika bolt up dan sedang beroperasi.                                 

  20. Comportamiento en flexión estática de vigas de madera antigua de Picea abies

    Directory of Open Access Journals (Sweden)

    Javier Ramón Sotomayor-Castellanos

    2014-01-01

    Full Text Available Las tipologías arquitecturales encontradas en el contexto del análisis estructural de construcciones con significado histórico y cultural son complejas. El modelado numérico es propuesto como una solución para diagnosticar la seguridad estructural de estas edificaciones. En esta investigación se realizaron pruebas de flexión estática de acuerdo a la norma Europea EN 408 y se calcularon los módulos de elasticidad y de ruptura en 5 vigas antiguas de Picea abies. La densidad de la madera fue de 422 kg/m3 para las vigas con un contenido de humedad de 12 %. El módulo de elasticidad promedio fue de 9,059 MPa y el módulo de ruptura fue de 29.18 Pa. Los módulos presentaron una variabilidad aceptable. Los resultados experimentales se contrastaron con las predicciones numéricas empleando el método del elemento finito. Las predicciones numéricas en los dominios lineal y no lineal mostraron buena aproximación con los resultados experimentales.

  1. Diagramas de interacción para secciones metálicas huecas a flexión esviada compuesta

    Directory of Open Access Journals (Sweden)

    Irles Más, Ramón

    1994-06-01

    Full Text Available Interaction graphs are extensively used as a tool for designing prismatic member sections subjected to several combined stresses. For a long time, sets of these graphs are available in building technologies: reinforced concrete, steel and composite sections, under various stresses. The paper shows the general formulation for obtaining the graphs corresponding to biaxial bending with axial force of hollow steel sections; with circular, rectangular and square shape, with or without vertex rounded. In particular, a detailed general analysis of the interaction surface is made for these stresses over the above cited sections.

    El uso de los diagramas de interacción como herramienta de predimensionado o dimensionado de secciones de piezas prismáticas sometidas a combinaciones de varios esfuerzos constituye algo habitual en la técnica. Desde hace tiempo se dispone de colecciones de estos diagramas para las diversas tecnologías: hormigón armado, acero estructural y secciones mixtas, bajo diversas solicitaciones. En el artículo se expone minuciosamente el planteamiento general para la obtención de los diagramas correspondientes a flexión biaxil compuesta en secciones huecas, circulares y rectangulares o cuadradas, con o sin redondeo de vértices. En particular, se realiza un estudio general detallado de la superficie de interacción de estos tres esfuerzos en dichas secciones.

  2. Application of the FlexiForce contact surface force sensor to continuous extraocular compression monitoring during craniotomy for cerebral aneurysms.

    Science.gov (United States)

    Mutoh, Tatsushi; Ishikawa, Tatsuya; Nishimura, Hiromi; Yasui, Nobuyuki

    2010-01-01

    The aims of this study were to introduce our newly developed device equipped with a contact surface force sensor (FlexiForce) for monitoring extraocular compression continuously, and to illustrate its potential clinical application using this device in patients undergoing uncomplicated frontotemporal or bifrontal craniotomy for surgical clipping of unruptured anterior circulation aneurysms. In a pilot study with volunteers, we determined the critical force of 100 gf to cause painful ocular sensation. Then we performed the bilateral extraocular force measurements in 15 patients undergoing uncomplicated frontotemporal or bifrontal craniotomy for surgical clipping of unruptured anterior circulation aneurysms. Extraocular force increased immediately after retraction of the flap, increased to 144+/-26 gf (mean+/-SD) during lower craniotomy close to the orbit, was maintained at 91+/-18 gf during microsurgery, and returned close to baseline at 24+/-14 gf after restoration of skin flap retraction. Such changes were observed only on the surgical side in frontotemporal craniotomy. Abnormal increase in extraocular force was effectively reduced by placing a real-time digital panel meter to warn surgeons to avoid excessive skin flap retraction during the surgical procedure. In conclusion, this new tool may allow us to monitor the external forces that can be applied intraoperatively to the ocular globe in the supine position.

  3. Experimental performance evaluation of software defined networking (SDN) based data communication networks for large scale flexi-grid optical networks.

    Science.gov (United States)

    Zhao, Yongli; He, Ruiying; Chen, Haoran; Zhang, Jie; Ji, Yuefeng; Zheng, Haomian; Lin, Yi; Wang, Xinbo

    2014-04-21

    Software defined networking (SDN) has become the focus in the current information and communication technology area because of its flexibility and programmability. It has been introduced into various network scenarios, such as datacenter networks, carrier networks, and wireless networks. Optical transport network is also regarded as an important application scenario for SDN, which is adopted as the enabling technology of data communication networks (DCN) instead of general multi-protocol label switching (GMPLS). However, the practical performance of SDN based DCN for large scale optical networks, which is very important for the technology selection in the future optical network deployment, has not been evaluated up to now. In this paper we have built a large scale flexi-grid optical network testbed with 1000 virtual optical transport nodes to evaluate the performance of SDN based DCN, including network scalability, DCN bandwidth limitation, and restoration time. A series of network performance parameters including blocking probability, bandwidth utilization, average lightpath provisioning time, and failure restoration time have been demonstrated under various network environments, such as with different traffic loads and different DCN bandwidths. The demonstration in this work can be taken as a proof for the future network deployment.

  4. The Exeter Contemporary flanged cemented acetabular component in primary total hip arthroplasty.

    Science.gov (United States)

    Maggs, J L; Smeatham, A; Whitehouse, S L; Charity, J; Timperley, A J; Gie, G A

    2016-03-01

    We report on the outcome of the Exeter Contemporary flanged cemented all-polyethylene acetabular component with a mean follow-up of 12 years (10 to 13.9). This study reviewed 203 hips in 194 patients. 129 hips in 122 patients are still in situ; 66 hips in 64 patients were in patients who died before ten years, and eight hips (eight patients) were revised. Clinical outcome scores were available for 108 hips (104 patients) and radiographs for 103 hips (100 patients). A retrospective review was undertaken of a consecutive series of 203 routine primary cemented total hip arthroplasties (THA) in 194 patients. There were no acetabular component revisions for aseptic loosening. Acetabular revision was undertaken in eight hips. In four hips revision was necessitated by periprosthetic femoral fractures, in two hips by recurrent dislocation, in one hip for infection and in one hip for unexplained ongoing pain. Oxford and Harris hip scores demonstrated significant clinical improvement (all p acetabular components available for radiological evaluation. In 27 of these, the line was confined to zone 1. No component had migrated. Kaplan-Meier survivorship, with revision for aseptic loosening as the endpoint, was 100% at 12.5 years and for all causes was 97.8% (95% confidence interval 95.6 to 100) when 40 components remained at risk. The Exeter Contemporary flanged cemented acetabular component demonstrates excellent survivorship at 12.5 years. The Exeter Contemporary flanged cemented acetabular component has excellent clinical outcomes and survivorship when used with the Exeter stem in total hip arthroplasty. ©2016 The British Editorial Society of Bone & Joint Surgery.

  5. The shear-stress intensity factor for a centrally cracked stiff-flanged shear web

    Science.gov (United States)

    Fichter, W. B.

    1976-01-01

    By use of the principle of superposition the stiff-flanged shear web is modeled mathematically by an infinite elastic strip with fixed longitudinal edges. The shear-stress intensity factor for a central longitudinal crack is calculated for various values of the ratio of strip width to crack length, h/a, in the range 0.1-10. The interaction of the crack with the boundaries is illustrated by boundary shear-stress distributions for three values of h/a. Some implications of the results for the design of damage-tolerant shear webs are discussed briefly.

  6. Dynamic Stability of Deep and Slender Wide-Flange Steel Columns – Full Scale Experiments

    OpenAIRE

    Elkady, Ahmed Mohamed Ahmed; Lignos, Dimitrios

    2016-01-01

    In North America, a common design practice for steel frame buildings with perimeter steel special moment frames (SMFs) is to employ deep and slender wide-flange steel columns (i.e., range of column depth, d > 16 inches). Till recently, very little was known regarding the hysteretic behavior of such members because of lack of available experimental data. This paper discusses selective findings from a full-scale testing program that was conducted at École Polytechnique Montréal with the use o...

  7. Treatment outcome with guiding flange prosthesis in hemimandibulectomy patients: Case series of three patients

    Science.gov (United States)

    Kar, Sushil; Tripathi, Arvind; Madhok, Riti

    2015-01-01

    There are various indications that may necessitate partial or complete resection of the mandible, from trauma to congenital deformities. However, the most prevalent indication that requires surgical resection of the mandible along with the involved adjacent oral structures is the presence of a locally aggressive neoplastic growth. The resultant continuity defect leads to an alteration in the range and direction of mandibular movement, impedes clear articulation of syllables and cosmetic disfigurement. The role of a prosthodontist is paramount in bringing about the restoration of the esthetic and functional dysfunction. This article discusses a series of hemimandibulectomy cases wherein mandibular deviation was successfully corrected using guide-flange prosthesis. PMID:26981486

  8. Design of stamping die for the flanging, hole flanging and pressing convex hull of top cover plate%顶罩板翻边翻孔压凸包模设计

    Institute of Scientific and Technical Information of China (English)

    伍国柱

    2014-01-01

    The structure of a stamping die for the flanging, hole flanging and pressing con-vex hull of a top cover plate was stated. The key point is the stripping of materials after the inward flanging.%介绍了顶罩板翻边翻孔压凸包模的结构,模具解决了顶罩板的边内翻后卸料问题。实践证明,模具结构设计合理,使用寿命长,满足零件批量生产要求,对同类模具的设计有一定参考作用。

  9. A multi-step assembly process: drawing, flanging and hemming of metallic sheets

    Science.gov (United States)

    Manach, P. Y.; Le Maoût, N.; Thuillier, S.

    2010-06-01

    This paper presents hemming tests on complex geometries, combining curved surfaces and radii of curvature in the plane. The samples are firstly prestrained in order to obtain a strain history prior to flanging and hemming. The choice of the sample geometries as well as prior plastic strains is based on a survey of current geometries hemmed in automotive doors. A device has been designed to hem these samples both by classical and roll-hemming processes and to allow a comparison between both technologies. Roll-in, which characterizes the change of geometry of the hemmed zone between flanging and hemming, and loads are obtained during this multistep process. Results show that roll-in observed in roll-hemming is lower than in classical hemming and that its evolution greatly differs between the two processes. The analysis of the results on different samples shows that it is difficult to establish rules on the variation of other parameters in such a complex multistep process and that it requires an intensive use of numerical simulation.

  10. Análisis del comportamiento a flexión de muros de adobe reforzados con geomallas

    Directory of Open Access Journals (Sweden)

    Solís, M.

    2015-09-01

    Full Text Available Rammed earth is a widely used building material in many regions of the world. Due to the high seismic risk in those areas, earthen constructions require suitable and efficient reinforcement techniques from a technological and socioeconomic point of view. This paper analyzes the bending behavior of geogrid reinforced adobe walls from an experimental and analytical point of view. The experimental bending moment-curvature relationships are analytically approached. The results show how geogrid reinforcement improves the performance of adobe masonry in terms of strength and ductility. Thus, a better seismic performance is achieved.La tierra cruda constituye el material de construcción más importante en muchas regiones del planeta. Dado el riesgo sísmico existente en la mayor parte de estas regiones, es necesario el desarrollo de técnicas de refuerzo eficaces y adecuadas desde un punto de vista tecnológico y socioeconómico. Este artículo analiza desde un punto experimental y analítico el comportamiento a flexión de muros de adobe reforzados con geomallas. Las leyes momento-curvatura de los muros ensayados son aproximadas mediante una serie de modelos analíticos que permiten analizar el comportamiento del material compuesto adobe-geomalla. Los resultados obtenidos muestran como la geomalla mejora el comportamiento de la mampostería de adobe en términos de resistencia y ductilidad, mejorando así su comportamiento en caso de movimiento sísmico.

  11. Dimensionamiento en rotura a flexión de secciones de hormigón armado. Un planteamiento compacto

    Directory of Open Access Journals (Sweden)

    Gil-Martín, L. M.

    2012-12-01

    Full Text Available This paper is an overview of the traditional method of strength design of reinforced concrete sections. The procedure, presented in the current textbooks, dates from the 50's of XX century and it can be simplified. In this work the approach is reformulated and presented in a more compact way, which implies a change both from the educational point of view and from the professional point of view of reinforced concrete. Theorem of Optimal Reinforcement of RC Sections confirms that the ingenious solutions proposed by Whitney and Wuczkowsky correspond to the minimum of a general problem that can be developed more rationally. Presenting the problem in compact form, using diagrams RSD allowed to choose alternative solutions of reinforcement with reduced environmental impact.

    Este artículo es una revisión general del procedimiento tradicional de dimensionamiento en rotura de secciones de hormigón armado. El procedimiento que recogen la mayor parte de los libros de texto actuales data de los años 50 del siglo XX y es susceptible de ser simplificado. En este artículo el planteamiento se reformula y se presenta de una manera más compacta, lo que supone un cambio tanto desde el punto de vista docente como desde el punto de vista profesional del hormigón armado. El Teorema de Armado a Flexión confirma que las ingeniosas soluciones propuestas por Whitney o Wuczkowsky, corresponden a los mínimos de un problema general que puede ser planteado de una forma más racional. El hecho de presentar el problema de forma compacta, empleando los diagramas RSD permite poder elegir soluciones alternativas de armado de menor impacto medioambiental.

  12. Análisis de dos tipos de refuerzo a flexión de forjados de semiviguetas

    Directory of Open Access Journals (Sweden)

    Ramírez, José L.

    1989-02-01

    Full Text Available Slabs are the most costly structural elements in a building, often accounting for more than 20 % of the cost of the building. Therefore, and as a continuation of previous works on columns and beams, the authors are working on a research project relative to the strengthening of slabs, both massive concrete slabs and those in joist construction form. This article presents the results of flexural strengthening carried out by attaching steel mesh to the bottom of joist construction slabs with adhesive mortar or shot concrete. Very good results were obtained, which are hard to explain, if it is taken into account that 85 % of the reinforcement is adhered to the porous concrete filling piedes between ribes which are of no significant strength in the calculation, and only 15 % to the resistant ribs bottoms.

    Los forjados constituyen el elemento estructural de mayor incidencia económica en el coste de un edificio de plantas, alcanzando porcentajes respecto al valor total del inmueble que superan habitualmente el 20%. Por ello, y continuando trabajos anteriores en torno a pilares y vigas, se está desarrollando por los autores un proyecto de investigación relativo al refuerzo de forjados, tanto en forma de losa maciza como confeccionados a partir de semiviguetas. En el presente artículo se exponen los resultados del refuerzo a flexión adhiriendo malla de acero a la parte inferior de los forjados de semiviguetas por medio de mortero adherente u hormigón proyectado. Se comprueban muy buenos resultados, difícilmente esperables contando con que la nueva armadura está adherida en un 85% a la parte inferior de las bovedillas de relleno, sin consideración resistente en el cálculo, y sólo en un 15% a la semivigueta resistente.

  13. Seguridad remanente a flexión en forjados con corrosión en las viguetas

    Directory of Open Access Journals (Sweden)

    Gil, E.

    2015-03-01

    Full Text Available A large number of slabs with severe corrosion problems at the precast joists have appeared in Spain, often increased by the use of aluminous cement. The purpose of this paper is to evaluate the residual safety for the bending mechanisms in the most common cases of damaged slabs, to decide the magnitude of the needed intervention. The damaged slabs have been evaluated as a part of an entire building, since the boundary conditions are essential for obtaining actual behavior, taking into account the different phases of the construction process and deterioration over time. A major cracking in the constructive elements are not frequently observed in inspections, and it is found that there is a sufficient residual safety to undertake the rehabilitation works without exceptional measures.A nivel nacional han aparecido un gran número de forjados de viguetas prefabricadas con graves problemas de corrosión, potenciada en muchas ocasiones por el empleo del cemento aluminoso. El propósito de este trabajo es evaluar la seguridad residual de los mecanismos de flexión en los casos más habituales de forjados dañados, para decidir la magnitud de la intervención necesaria. Los forjados dañados se han evaluado formando parte de un edificio completo, ya que las condiciones de contorno son fundamentales para la obtención del comportamiento real, teniendo en cuenta las distintas fases del proceso constructivo y de deterioro en el tiempo. En bastantes ocasiones en la inspección no se observa una fisuración importante en los elementos constructivos, como solados o tabiquería, y hemos comprobado que existe una seguridad residual suficiente para acometer las obras de rehabilitación sin necesidad de adoptar medidas excepcionales.

  14. Management of osteoarthritis (OA) with the pharma-standard supplement FlexiQule (Boswellia): a 12-week registry.

    Science.gov (United States)

    Belcaro, G; Dugall, M; Luzzi, R; Ledda, A; Pellegrini, L; Hu, S; Ippolito, E

    2015-10-22

    This registry study assessed the pharma-standard supplement FlexiQule (Boswellia extract in capsules) in the management of symptoms associated to osteoarthritis (OA) also managed with the 'standard management' (SM) in comparison with a group of patients managed only with SM. The 12- week registry included patients with symptomatic knee arthrosis. They were able to walk on a treadmill for a walking test and to complete the WOMAC questionnaire. 32 patients used the supplement and 34 acted as controls (SM). No safety problems were observed. At 12 weeks, the Karnofsky scale was significantly improved in both groups: the variation was higher (p<0.05) in the supplement group. The WOMAC score was decreased significantly more in the supplement+SM group in comparison with controls considering pain, stiffness and physical functions (p<0.05). For social and emotional functions the decrease in score was also more evident in the supplement group (p<0.05). Both groups improved in pain-free and total walking distance at 12 weeks. Pain-free walking distance (treadmill) was higher (p<0.05) with the supplement (from 93.4;11.6 m to 271.3;19.3 m) than in controls (from 90.5;13.5 m to 158.3;22.3)(p<0.05). The improvement in total walking distance was also higher in the supplement group (p<0.05) (from 164.3;23.2 to 322.3;22.3 m) in comparison with the SM- only group ( from 158.3;18,4 to 240.2;19.3 m). The need for concomitant drugs and medical attention during the registry was reduced more in the supplement group (p<0.05). In conclusion the difference between SM and the Flexiqule+SM was in favor of the management with the supplement for all target measurements. The product is safe and well tolerated.

  15. Tightness and Material Aspects of Bolted Flange Connections With Gaskets of Nonlinear Properties Exposed to Variable Loads

    Directory of Open Access Journals (Sweden)

    Walczak R.

    2016-09-01

    Full Text Available The paper presents the problems regarding bolted flange connections with gaskets used in chemical, petrochemical and energy industry. The aim of the research is to present state of knowledge regarding pipelines and apparatus in industrial installations and rules and regulations regarding flange connections tightness. Additionally a calculation example regarding flange connection according to ASME VIII DIV 1 requirement and then detailed Finite Element Analysis presented; impact of nonlinear material properties (gasket loading unloading curves on the connection tightness for complex loading programme is shown. It is finally concluded that in addition to usual design calculations more precise calculation is needed to fully verify behaviour of sealed connection at complex extreme variable loadings. Material aspect is very important at designing, testing, service and maintenance; taking it into consideration may avoid many problems related to safe exploitation.

  16. An Analysis Of The Industrial Forging Process Of Flange In Order To Reduce The Weight Of The Input Material

    OpenAIRE

    Gronostajski Z.; Hawryluk M.; Kaszuba M.; Misiun G.; Niechajowicz A.; Polak S.; Pawełczyk M.

    2015-01-01

    This paper presents an analysis of the industrial process of hot forging a flange. The authors developed several thermomechanical models of the forging process for which they carried out computer simulations using the MSC.Marc 2013 software. In the Jawor Forge flanges with a neck are manufactured by hot forging in crank presses with a maximum load of 25 MN. The input material, in the form of a square bar, is heated up to a temperature of 1150°C and then formed in three operations: upsetting, ...

  17. A FINITE ELEMENT ANALYSIS OF THE FLANGE EARRINGS OF STRONG ANISOTROPIC SHEET METALS IN DEEP-DRAWING PROCESSES

    Institute of Scientific and Technical Information of China (English)

    柳玉起; 王锦程; 胡平

    2002-01-01

    Flange earrings of strong anisotropic sheet metals in deep-drawingprocess are numerically analyzed by the elastic-plastic large deformation finite ele-ment formulation based on a discrete Kirchhoff triangle plate shell element model.A Barlat-Lian anisotropic yield function and a quasi-flow corner theory are used inthe present formulation. The numerical results are compared with the experimentalones of cylindrical cup drawing process. The focus of the present researches is on thenumerical analysis and the constraining scheme of the flange earring of circular sheetswith strong anisotropy in square cup drawing process.

  18. Efecto de la duración y técnica de estiramiento de la musculatura isquiosural sobre la flexión de cadera

    OpenAIRE

    Ayala, Francisco; Sainz de Baranda Andújar, Pilar

    2008-01-01

    El objetivo fue valorar la eficacia de diferentes técnicas y duraciones de un programa de estiramientos para aumentar el rango de movimiento de la flexión de cadera en adultos jóvenes. Un total de 139 adultos jóvenes voluntarios (peso: 70,18 ± 10,40 kg; talla 172,68 ± 7,00 cm; edad 21,3 ± 2,4 años) fueron distribuidos aleatoriamente en 5 grupos; un grupo control y 4 grupos experimentales. El grupo experimental 1 realizó 15 segundos de estiramientos pasivos, el grupo experimental 2 realizó ...

  19. 博世Dinion和FlexiDome720p高清摄像机采用内置预激活IVA

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    博世日前宣布,其DiniOn和FlexiDome高清720p日夜两用型IP摄像机目前已内置预激活的智能视频分析系统(IVA)。博世这些新款摄像机可以用户提供固定式摄像机和半球式摄像机两种选择,并附带高清晰度的“即插即用”的IVA智能视频分析系统。

  20. Instrumentación del equipo de laboratorio de resistencia de materiales para ensayos dinámicos a flexión de probetas ranuradas

    OpenAIRE

    2009-01-01

    El presente trabajo describe la implementación de la instrumentación del equipo de ensayo dinámico a flexión de probetas ranuradas (ensayo Charpy), presente en el laboratorio de resistencia de materiales, por medio de la utilización de dispositivos electrónicos de medición, acondicionamiento de señal y adquisición de datos y software LabView para la presentación y manipulación de la información. The present work describes the implementation of the instrumentation of the equipment for...

  1. Resonancia magnética de columna cervical con secuencia en flexión para el diagnóstico de la enfermedad de Hirayama

    Directory of Open Access Journals (Sweden)

    P. Diluca

    2017-04-01

    Dado su excelente contraste tisular y la posibilidad de realizar adquisiciones en distintos planos, la resonancia magnética es el estudio de elección. Las imágenes deben ser obtenidas en posición neutra y en flexión cervical máxima para poner de manifiesto el desplazamiento de la dura, con el consiguiente aumento de la sensibilidad y especificidad de la prueba. Así, se logra mayor confianza en el diagnóstico y menor cantidad de falsos positivos, en comparación con la posición neutra como única adquisición.

  2. Thermal Shock Effects Modeling On A Globe Valve Body-Bonnet Bolted Flange Joint

    CERN Document Server

    Mathieu, Jean-Philippe; Ferrari, Jerome; Hersant, David

    2012-01-01

    This paper attends to show efforts made at EDF R&D to improve comprehension of valve parts loadings during operation. Thermal shock in a globe valve is represented and modeled using EDF R&D Finite Element Analysis code (Code_Aster). Choices of modeling are discussed and balanced on the basis of "what an engineer can obtain without becoming a researcher". First simulation results are presented. Attention is focused on the evolution of Body-Bonnet Bolted Flange Joint (BBBFJ) tightening forces which are simulated during the thermal shock. An experimental setup is also presented for the studied valve, which implies thermocouple implementation for comparison of the simulated thermal field and strain measurement on each threaded rod to validate the mechanical modeling.

  3. INJECTION MOLDING AND STRUCTURAL ANALYSIS IN METAL TO PLASTIC CONVERSION OF BOLTED FLANGE JOINT BY CAE

    Directory of Open Access Journals (Sweden)

    Marian Blaško

    2014-12-01

    Full Text Available Many metal parts in various applications are being replaced by plastic parts. There are several reasons for that depending on actual application - minimize part cost, enhance corrosion resistance, integrating more components into one part etc. Most important steps of metal to plastic conversion are material selection and design of plastic part. Plastic part has to withstand the same load as metal part. To fulfill this requirement fiber reinforced engineering plastics are often used. Also it is convenient to substitute heavy wall sections with ribbed structure to increase load-carrying ability of part and decrease cycle time, eliminate voids, sink marks etc. Mechanical properties of such part could be highly affected by fiber orientation. Results of fiber orientation from injection molding filling analysis can be used in stress analysis for better prediction of part response to mechanical load. Such coupled analysis is performed here in this case study on bolted flange joint.

  4. New flange correction formula applied to interfacial resistance measurements of ohmic contacts to GaAs

    Science.gov (United States)

    Lieneweg, Udo; Hannaman, David J.

    1987-01-01

    A quasi-two-dimensional analytical model is developed to account for vertical and horizontal current flow in and adjacent to a square ohmic contact between a metal and a thin semiconducting strip which is wider than the contact. The model includes side taps to the contact area for voltage probing and relates the 'apparent' interfacial resistivity to the (true) interfacial resistivity, the sheet resistance of the semiconducting layer, the contact size, and the width of the 'flange' around the contact. This relation is checked against numerical simulations. With the help of the model, interfacial resistivities of ohmic contacts to GaAs were extracted and found independent of contact size in the range of 1.5-10 microns.

  5. Non-orthogonal tool/flange and robot/world calibration.

    Science.gov (United States)

    Ernst, Floris; Richter, Lars; Matthäus, Lars; Martens, Volker; Bruder, Ralf; Schlaefer, Alexander; Schweikard, Achim

    2012-12-01

    For many robot-assisted medical applications, it is necessary to accurately compute the relation between the robot's coordinate system and the coordinate system of a localisation or tracking device. Today, this is typically carried out using hand-eye calibration methods like those proposed by Tsai/Lenz or Daniilidis. We present a new method for simultaneous tool/flange and robot/world calibration by estimating a solution to the matrix equation AX = YB. It is computed using a least-squares approach. Because real robots and localisation are all afflicted by errors, our approach allows for non-orthogonal matrices, partially compensating for imperfect calibration of the robot or localisation device. We also introduce a new method where full robot/world and partial tool/flange calibration is possible by using localisation devices providing less than six degrees of freedom (DOFs). The methods are evaluated on simulation data and on real-world measurements from optical and magnetical tracking devices, volumetric ultrasound providing 3-DOF data, and a surface laser scanning device. We compare our methods with two classical approaches: the method by Tsai/Lenz and the method by Daniilidis. In all experiments, the new algorithms outperform the classical methods in terms of translational accuracy by up to 80% and perform similarly in terms of rotational accuracy. Additionally, the methods are shown to be stable: the number of calibration stations used has far less influence on calibration quality than for the classical methods. Our work shows that the new method can be used for estimating the relationship between the robot's and the localisation device's coordinate systems. The new method can also be used for deficient systems providing only 3-DOF data, and it can be employed in real-time scenarios because of its speed. Copyright © 2012 John Wiley & Sons, Ltd.

  6. Optimización de diseño de llantas de aluminio a flexión mediante el método de elementos finitos

    Directory of Open Access Journals (Sweden)

    Fabio Marcelo Peña Bustos

    2010-01-01

    Full Text Available El presente trabajo da a conocer el proceso llevado a cabo para la optimización del diseño estructural a fatiga por flexión de llantas de aluminio automotrices en una empresa ubicada en la ciudad de Manizales, Colombia. El proceso se efectuó relacionando los análisis de elementos finitos con los resultados de la prueba física de fatiga por flexión, demostrando que el diseño de llantas de aluminio puede optimizarse reduciendo el tiempo de desarrollo de cada modelo, obteniendo llantas más livianas, lo cual significa ahorro en costos de desarrollo y manufactura del producto con las consecuentes mejoras de eficiencia y desempeño de los vehículos. Además, la incorporación temprana de la simulación el proceso de desarrollo del producto da como resultado diseños que pueden optimizarse antes de fabricar y ensayar los prototipos físicos. El trabajo presentado da a conocer entonces, cómo se ha incorporado exitosamente el análisis de elementos finitos como parte del proceso normal de diseño de llantas de la empresa objeto de estudio, con los consecuentes beneficios en términos de confiabilidad y productividad.

  7. Una teoría de la flexión con esfuerzo cortante en piezas de hormigón armado

    Directory of Open Access Journals (Sweden)

    López Jamar, J. A.

    1962-10-01

    Full Text Available En la Monografía número 221, el Instituto Eduardo Torroja de la Construcción y del Cemento ha publicado recientemente el trabajo arriba titulado, original de los ingenieros citados. Creemos constituye un interesante intento de explicar el comportamiento del hormigón armado en el caso de existir esfuerzos cortantes, simultáneamente con la flexión simple o compuesta. Actualmente se están realizando una serie de ensayos de rotura de vigas, en nuestros Laboratorios y bajo el patronato del Instituto, para contrastar esta teoría. Pero como consideramos interesará el asunto a muchos de nuestros lectores, exponemos a continuación un resumen de los principales puntos de aquélla y su comparación con los criterios clásicos que se han venido siguiendo hasta ahora.

  8. Wear Improvement of Tools in the Cold Forging Process for Long Hex Flange Nuts.

    Science.gov (United States)

    Hsia, Shao-Yi; Shih, Po-Yueh

    2015-09-25

    Cold forging has played a critical role in fasteners and has been widely used in automotive production, manufacturing, aviation and 3C (Computer, Communication, and Consumer electronics). Despite its extensive use in fastener forming and die design, operator experience and trial and error make it subjective and unreliable owing to the difficulty of controlling the development schedule. This study used finite element analysis to establish and simulate wear in automotive repair fastener manufacturing dies based on actual process conditions. The places on a die that wore most quickly were forecast, with the stress levels obtained being substituted into the Archard equation to calculate die wear. A 19.87% improvement in wear optimization occurred by applying the Taguchi quality method to the new design. Additionally, a comparison of actual manufacturing data to simulations revealed a nut forging size error within 2%, thereby demonstrating the accuracy of this theoretical analysis. Finally, SEM micrographs of the worn surfaces on the upper punch indicate that the primary wear mechanism on the cold forging die for long hex flange nuts was adhesive wear. The results can simplify the development schedule, reduce the number of trials and further enhance production quality and die life.

  9. Wear Improvement of Tools in the Cold Forging Process for Long Hex Flange Nuts

    Directory of Open Access Journals (Sweden)

    Shao-Yi Hsia

    2015-09-01

    Full Text Available Cold forging has played a critical role in fasteners and has been widely used in automotive production, manufacturing, aviation and 3C (Computer, Communication, and Consumer electronics. Despite its extensive use in fastener forming and die design, operator experience and trial and error make it subjective and unreliable owing to the difficulty of controlling the development schedule. This study used finite element analysis to establish and simulate wear in automotive repair fastener manufacturing dies based on actual process conditions. The places on a die that wore most quickly were forecast, with the stress levels obtained being substituted into the Archard equation to calculate die wear. A 19.87% improvement in wear optimization occurred by applying the Taguchi quality method to the new design. Additionally, a comparison of actual manufacturing data to simulations revealed a nut forging size error within 2%, thereby demonstrating the accuracy of this theoretical analysis. Finally, SEM micrographs of the worn surfaces on the upper punch indicate that the primary wear mechanism on the cold forging die for long hex flange nuts was adhesive wear. The results can simplify the development schedule, reduce the number of trials and further enhance production quality and die life.

  10. The nature of allometry in an exaggerated trait: The postocular flange in Platyneuromus Weele (Insecta: Megaloptera)

    Science.gov (United States)

    Ramírez-Ponce, Andrés; Garfias-Lozano, Gabriela; Contreras-Ramos, Atilano

    2017-01-01

    The origin and function of exaggerated traits exhibited by a great number of species with sexual dimorphism remain largely unexplored. The usual model considered as the evolutionary mechanism for the development of these structures is sexual selection. The nature of growth of the postocular flange (POF) in three species of the dobsonfly genus Platyneuromus (Megaloptera, Corydalidae, Corydalinae) is analyzed to explore sexual size dimorphism and allometric scaling. Results involve positive allometry of POF in males of two species, and negative allometry in males of one species, in general with a female-biased sexual dimorphism. We suggest an ancestral condition of dual incipient ornamentation in Platyneuromus, with a subsequent departure of size and shape of POF in males, triggered by sexual selection. Different sexual selection intensities may explain the parallel or divergent growth of POF within the scheme of dual ornamentation. Empirical behavioral data as well as a phylogenetic framework are necessary to clarify possible causes of phenotypic development, time of origin, and evolution of the POF. PMID:28212437

  11. Nitrile O-ring Cracking: A Case of Vacuum Flange O-ring Failures

    Energy Technology Data Exchange (ETDEWEB)

    Dees, Craig

    2016-07-01

    A review of recent nitrile O-ring failures in ISO-KF vacuum flange connections in glovebox applications is presented. An investigation of a single “isolated” o-ring failure leads to the discovery of cracked nitrile o-rings in a glovebox atmospheric control unit. The initial cause of the o-ring failure is attributed to ozone degradation. However, additional investigation reveals nitrile o-ring cracking on multiple gloveboxes and general purpose piping, roughly 85% of the nitrile o-rings removed for inspection show evidence of visible cracking after being in service for 18 months or less. The results of material testing and ambient air testing is presented, elevated ozone levels are not found. The contributing factors of o-ring failure, including nitrile air sensitivity, inadequate storage practices, and poor installation techniques, are discussed. A discussion of nitrile o-ring material properties, the benefits and limitations, and alternate materials are discussed. Considerations for o-ring material selection, purchasing, storage, and installation are presented in the context of lessons learned from the nitrile o-ring cracking investigation. This paper can be presented in 20 minutes and does not require special accommodations or special audio visual devices.

  12. The largest subsea hot tap (future tap flange) at Angel Field, Australia

    Energy Technology Data Exchange (ETDEWEB)

    Lad, Deepak; Drysdale, Colin [T.D. Williamson (United States); Naidoo, Sashie [T.D. Williamson (Australia)

    2008-07-01

    A subsea hot tap was conducted near the gas production platforms in Angel Field, Australia in September 2007 and verified as the largest no. 900 subsea hot tap by Australian authorities. This paper outlines the subsea tapping process, risks and safety issues in deep water environment, including the need to ensure 100% system accuracy and that the machine fluids used to operate the subsea tapping machines were environmentally friendly. The testing phase included land and water testing. In the land tests, issues relating to metal hardness, temperature, pressure and ocean currents that affected machine stability, torque and cutting rate were considered. All preliminary design and testing focused on being able to mount the tapping machine to a pre-existing hot-tap flange and conduct the tapping operation, start to finish, preferably without changing the cutter. The water depth tests took place inside a pressurized, underwater hyperbaric chamber. The equipment repeated the land testing process in conditions duplicating that of the actual project site. Timing was also measured in multiple climatic conditions (except water depth) to obtain an estimation of various scenarios. The field tapping process was conducted without problems in over six hours with a single cutter and without any stalls. (author)

  13. An Analysis Of The Industrial Forging Process Of Flange In Order To Reduce The Weight Of The Input Material

    Directory of Open Access Journals (Sweden)

    Gronostajski Z.

    2015-06-01

    Full Text Available This paper presents an analysis of the industrial process of hot forging a flange. The authors developed several thermomechanical models of the forging process for which they carried out computer simulations using the MSC.Marc 2013 software. In the Jawor Forge flanges with a neck are manufactured by hot forging in crank presses with a maximum load of 25 MN. The input material, in the form of a square bar, is heated up to a temperature of 1150°C and then formed in three operations: upsetting, preliminary die forging and finishing die forging. The main aim of the studies and the numerical analyses, in which the geometry of the tools would be modified, was to maximally reduce the amount of the input material taking into account the capabilities of the Jawor Forge, and consequently to significantly reduce the production costs. Besides the Forge’s equipment resources, the main constraint for modifications was the flange-with-neck forging standard which explicitely defines the tolerances for this element. The studies, which included numerical modelling, infrared measurements and technological tests, consisted in changing the geometry of the tools and that of the forging preform. As a result, the optimum direction for modifications aimed at reducing the mass of the input material was determined. The best of the solutions, making it possible to produce a correct forging in the Jawor Forge operating conditions, were adopted whereby the weight of the preform was reduced by 6.11%. Currently research is underway aimed at the application of the proposed and verified modifications to other flange forgings.

  14. Experimental Investigation of the Hysteretic Behavior of Wide-Flange Steel Columns under High Axial Load and Lateral Drift Demands

    OpenAIRE

    Lignos, Dimitrios; Cravero, Julien; Elkady, Ahmed Mohamed Ahmed

    2016-01-01

    This paper discusses the findings from a large-scale experimental program that characterized the hysteretic behavior of typical steel wide-flange columns in steel moment-resisting frames (MRFs). The test specimens were tested in a cantilever configuration with a fixed point of inflection. The main testing parameters included various lateral and axial loading histories, the applied axial compressive load and the local slenderness of the cross-section. It is shown that (a) steel columns subject...

  15. Numerical study of influence of anisotropy on flanging earing based on Barlat six-component yield function

    Institute of Scientific and Technical Information of China (English)

    李大永; 张少睿; 彭颖红; 胡平

    2003-01-01

    The anisotropy of stamped sheet metal exerts evident effects on the formability. Barlat six-component yield function was introduced into the elastoplastic finite element formulation based on the principle of virtual velocity and the discrete Kirchhoff triangular element model. The flanging earing in cylindrical cup drawing process of circular sheet metal was numerically simulated. The influence of anisotropy on the forming process was studied.

  16. Evaluation of Fatigue Strength Improvement by CFRP Laminates and Shot Peening onto the Tension Flanges Joining Corrugated SteelWebs

    Directory of Open Access Journals (Sweden)

    Zhi-Yu Wang

    2015-08-01

    Full Text Available Corrugated steel web with inherent high out-of-plane stiffness has a promising application in configuring large span highway bridge girders. Due to the irregularity of the configuration details, the local stress concentration poses a major fatigue problem for the welded flange plates of high strength low alloy structural steels. In this work, the methods of applying CFRP laminate and shot peening onto the surfaces of the tension flanges were employed with the purpose of improving the fatigue strength of such configuration details. The effectiveness of this method in the improvement of fatigue strength has been examined experimentally. Test results show that the shot peening significantly increases hardness and roughness in contrast to these without treatment. Also, it has beneficial effects on the fatigue strength enhancement when compared against the test data of the joints with CFRP strengthening. The stiffness degradation during the loading progress is compared with each treatment. Incorporating the stress acting on the constituent parts of the CFRP laminates, a discussion is made regarding the mechanism of the retrofit and related influencing factors such as corrosion and economic cost. This work could enhance the understanding of the CFRP and shot peening in repairing such welded details and shed light on the reinforcement design of welded joints between corrugated steel webs and flange plates.

  17. Proposal for the award of a contract for the supply of instrumentation cover flanges for the LHC cryomagnets

    CERN Document Server

    2002-01-01

    This document concerns the award of a contract for the supply of instrumentation cover flanges for the LHC cryomagnets. Following a market survey carried out among 58 firms in eleven Member States and a price enquiry (DO-20015/LHC/LHC) for qualifying prototypes sent to four firms and three consortia consisting of two firms in the Member States, a call for tenders (IT-2857/LHC/LHC) for the series production was sent on 30 November 2001 to two firms and one consortium consisting of two firms in three Member States. By the closing date, CERN had received three tenders from two firms and one consortium in three Member States. The Finance Committee is invited to agree to the negotiation of a contract with SOCIETE DES CERAMIQUES TECHNIQUES (FR), the lowest bidder, for the supply of 1654 instrumentation cover flanges for a total amount of 3 225 796 Swiss francs, not subject to revision, with an option for 100 additional instrumentation cover flanges, for an additional amount of 195 000 Swiss francs, subject to revis...

  18. Calculation of bolted flange connections of metal to metal contact type. Results of MPA/VGB-project SA ''AT'' 19/08

    Energy Technology Data Exchange (ETDEWEB)

    Koenig, G. [EnBW Kernkraftwerk GmbH, Neckarwestheim (Germany); Bieselt, R. [RWE Power AG, Essen (Germany); Klucke, D. [E.ON Kernkraft GmbH, Hannover (Germany); Schuemann, D. [Vattenfall Europe, Nuclear Energy GmbH, Hamburg (Germany); Kurz, H.; Kockelmann, H. [Stuttgart Univ. (Germany). MPA

    2010-07-01

    Subject of a research project carried out at Material Testing Institute (MPA) University of Stuttgart was the investigation of bolted flange connections (DN100 PN100 and PN160) of metal-to-metal contact type. In a special test rig external loadings (axial forces, bending and torsional moments as well as shearing forces) can be applied in addition to the internal pressure. Further on an analytical approach was developed for the determination of the loading in different cross sections of the flanges and for the tightness proof by means of the gap between the flanges at the position of the gasket. On the basis of a comparison of the experimental results and those of numerical calculations with results according to the new developed analytical approach the latter can be regarded as validated as far as investigated. In the nuclear code KTA 3211.2 (draft 2003) [1] the flange rotation at metal-to-metal contact (MMC) is restricted globally to 0.1 . This limitation does not comply with a lot of bolted flange connections in service although the strength and tightness criteria are met. This problem is now resolved with the new developed analytical approach which takes also into consideration the non-negligible influence of the assembly bolt load exceeding the minimum required bolt load for metal-to-metal contact. In a following project for defined boundary conditions the basis for the strength and tightness proof for bolted flange connections (MMC type) without explicit calculation shall be created. (orig.)

  19. 用粉末冶金方法制造压缩机法兰%Sintering processing of compressor flanges

    Institute of Scientific and Technical Information of China (English)

    J.K.Park; H.S.Park; S.T.Choi; 韩凤麟

    2012-01-01

    To manufacture a flange for a compressor with a relief groove by using powder metallurgy in order to prevent deformation to the compressor in operation, powder material for the flange is charged into a mold; an ablative member having a melting point lower than that of the powder material is positioned at a place where a relief groove is to be formed;the flange is formed by compressing the powder material and the ablative member;and the formed flange is sintered at a temperature between the melting point of the powder material and the ablative member so as to melt and remove the ablative member. It made according to the new method has more excellent strength and airtight property than the conventional one. It is analyzed that the ablative member is melted and penetrated into the flange structure during the sintering process, which results in improvement of the airtight property and increase of the strength.%为防止压缩机在运行中变形,用粉末冶金方法制造了带减压槽的压缩机法兰.将制造法兰的粉末材料装于模腔中,然后,将熔点比粉末材料低的熔渗件置于减压槽位置进行成形;将粉末材料与熔渗件压制成形为法兰;在粉末材料与熔渗件熔点之间的温度下进行烧结,使熔渗件熔化和渗入粉末材料之中.用新方法制造的法兰比用常规方法生产的强度高、密封性好.根据分析,在烧结时,由于熔渗件熔化与渗透到法兰结构中,改进了气密性,增高了强度.

  20. Efecto del estiramiento estático de 15, 30 y 60 segundos sobre el rango de movimiento de la flexión de cadera con rodilla extendida

    OpenAIRE

    Claudia Lucía Ariza-García; Milena del Carmen Boneth-Collante; Adriana Angarita-Fonseca; Angelica María Corredor-Moreno; Silvia Milena Cárdenas-Castellanos

    2014-01-01

    Objetivo: Evaluar el efecto de tres duraciones de estiramiento estático pasivo, 15, 30 y 60 segundos (s) para aumentar el rango de movimiento de la flexión de cadera (ROM-FC). Metodología: Ensayo Clínico Controlado Aleatorizado. Nueve estudiantes mujeres (21,7 ± 4,3 años) fueron asignadas aleatoriamente a tres grupos, 15 (G15), 30 (G30) y 60 (G60) s; n = 3 en cada grupo. El estiramiento de la musculatura isquitotibial se realizó en decúbito supino, máxima flexión de cadera, rodilla extendida ...

  1. Determinación de la variación de la resistencia a flexión y módulo de elasticidad longitudinal de la guadua angustifolia kunth, con el contenido de humedad

    OpenAIRE

    Dumar Lobo, Jorge

    2014-01-01

    Se estudió la variación de la resistencia a la flexión y módulo de elasticidad en función del contenido de humedad para la Guadua angustifolia Kunth. La metodología experimental consistió en ensayos de flexión de tres puntos en pequeñas muestras extraídas de la parte inferior, media y superior de las tres partes de la guadua. El contenido de humedad de cada muestra se modificó utilizando una metodología que garantiza una variación controlada entre 0% y 25%. Con los datos experimentales y el a...

  2. Efecto del estiramiento estático de 15, 30 y 60 segundos sobre el rango de movimiento de la flexión de cadera con rodilla extendida

    OpenAIRE

    Ariza-García, Claudia Lucía; Boneth-Collante, Milena del Carmen; Angarita-Fonseca, Adriana; Corredor-Moreno, Angelica María; Cárdenas-Castellanos, Silvia Milena

    2014-01-01

    Objetivo: Evaluar el efecto de tres duraciones de estiramiento estático pasivo, 15, 30 y 60 segundos (s) para aumentar el rango de movimiento de la flexión de cadera (ROM-FC). Metodología: Ensayo Clínico Controlado Aleatorizado. Nueve estudiantes mujeres (21,7 ± 4,3 años) fueron asignadas aleatoriamente a tres grupos, 15 (G15), 30 (G30) y 60 (G60) s; n = 3 en cada grupo. El estiramiento de la musculatura isquitotibial se realizó en decúbito supino, máxima flexión de cadera, rodilla extendida ...

  3. Efecto del estiramiento estático de 15, 30 y 60 segundos sobre el rango de movimiento de la flexión de cadera con rodilla extendida

    OpenAIRE

    Claudia Lucía Ariza-García; Milena del Carmen Boneth-Collante; Adriana Angarita-Fonseca; Angelica María Corredor-Moreno; Silvia Milena Cárdenas-Castellanos

    2016-01-01

    Objetivo: Evaluar el efecto de tres duraciones de estiramiento estático pasivo, 15, 30 y 60 segundos (s) para aumentar el rango de movimiento de la flexión de cadera (ROM-FC). Metodología: Ensayo Clínico Controlado Aleatorizado. Nueve estudiantes mujeres (21,7 ± 4,3 años) fueron asignadas aleatoriamente a tres grupos, 15 (G15), 30 (G30) y 60 (G60) s; n = 3 en cada grupo. El estiramiento de la musculatura isquitotibial se realizó en decúbito supino, máxima flexión de cadera, rodilla extendida ...

  4. Cálculo de tensiones en uniones soldadas con costuras de filete asimétricas sometidas a flexión. // Bending shear stresses calculation in welded joints with asymmetric welding fillets.

    Directory of Open Access Journals (Sweden)

    H. Hernández Herrera

    2004-09-01

    Full Text Available En el trabajo se presenta el cálculo de las tensiones de cortante en la sección de la garganta para las uniones soldadassometidas a flexión con costuras de filete de sección transversal asimétrica cuando el plano de carga no pasa por el centrode flexión o no coincide con los ejes centroidales principales de inercia. Los resultados obtenidos por las expresiones decálculo propuestas se comparan con los obtenidos por el Método de los Elementos Finitos demostrando de esta manera lavalidez de las mismas.Palabras claves: Flexión, uniones soldadas, soldadura de filete.___________________________________________________________________________Abstract.In this paper is presented the bending shear stresses calculation in the throat area for asymmetric welded joints with filletweldings, when the load plane does not go by the flexion center or it do not coincide with the mains inertia centroidal axes.The results obtained by the proposed expressions are compared with those obtained by the Finite Elements Methoddemonstrating by this way the validity of the same ones.Key words: Bending, welded joints, fillet weldings.

  5. Dimensionamiento del refuerzo a flexión con laminados de polímeros reforzados con fibras (FRP evitando su desprendimiento prematuro

    Directory of Open Access Journals (Sweden)

    Oller, E.

    2013-12-01

    Full Text Available According to the available experimental research related to structures flexurally strengthened by bonding fiber reinforced polymer (FRP laminates, the laminate debonds in a brittle manner in most tests. This debonding failure usually initiates in the most loaded regions due the effect of intermediate cracks (intermediate crack debonding. From the beginning of this technique, several models have been developed to avoid this premature failure. However, some of them present a significant scatter in relation to the experimental data. This paper presents a comparative analysis of the existing formulations through a database of tests compiled by the authors. Afterwards, a design procedure based on a shear-bending moment interaction diagram related to intermediate crack debonding is presented. This interaction diagram depends on the maximum shear force between crack discontinuities. Finally, the proposed method is compared to the rest of the models obtaining satisfactory results when predicting the failure load.La investigación experimental de elementos de hormigón reforzados a flexión mediante la adhesión de laminados de polímeros reforzados con fibras (FRP muestra que en la mayor parte de ensayos, el laminado se desprende de forma prematura iniciándose normalmente el fallo en las regiones más solicitadas debido al efecto de las fisuras intermedias. Desde los inicios de esta técnica de refuerzo, se han desarrollado modelos para evitar este tipo de rotura, la mayoría de los cuales presentan una dispersión considerable comparando sus resultados con los experimentales. En este artículo se presenta un análisis comparativo de diferentes formulaciones existentes a partir de una base de datos de ensayos recopilada por los autores. Posteriormente, se propone un método de dimensionamiento basado en un diagrama de interacción cortante-flexión asociado al desprendimiento del refuerzo, que depende de la máxima fuerza rasante transmitida entre

  6. Cálculo en agotamiento de secciones de fábrica reforzadas a flexión con láminas de FRP

    Directory of Open Access Journals (Sweden)

    Martínez, S.

    2015-12-01

    Full Text Available Masonry structures can hardly resist tensile loads. For this reason these structures are vulnerable to accidental actions, such as earthquakes, or when they suffer damage that change their geometry conditions, for instead, due to differential soil settlements. This paper presents an ultimate limit state method for checking FRP-strengthened unreinforced masonry sections. The method is similar to the one used for reinforced concrete members, but it is adapted to masonry and FRP laminates particularities. In this proposal a bilinear strength-strain relationship is used and the FRP design strain is limited to take into account different aspects which cause the plate can’t reach its ultimate strength. In particular, it is proposed a “bond reduction factor”, derived from a large bending test database.Las estructuras de fábrica apenas tienen capacidad para resistir tracciones lo que las hace vulnerables ante acciones desestabilizantes de tipo accidental, como terremotos, o cuando sufren daños que alteran su geometría, por ejemplo, por asientos diferenciales. En este trabajo se presenta un método para la comprobación en agotamiento de secciones de fábrica reforzadas a flexión con láminas de FRP. Está basado en el procedimiento de cálculo de la capacidad resistente de secciones de hormigón pero adaptado a las particularidades y condicionantes de las fábricas reforzadas. En esta propuesta se utiliza un diagrama de cálculo tensión deformación de la fábrica de tipo bilineal y se limita la deformación de cálculo del refuerzo teniendo en consideración ciertos aspectos que provocan que no pueda desarrollar toda su resistencia. En concreto, se propone un «coeficiente reductor por adherencia» que se determina a partir de una amplia base de datos con ensayos de flexión.

  7. Study on Drawing Technical with Flange Cylinder%有凸缘圆筒件拉深工艺研究

    Institute of Scientific and Technical Information of China (English)

    李素丽; 刘伟

    2011-01-01

    针对有凸缘圆筒件拉深成形过程,确定了各工序合适的工艺参数,并结合首次拉深的网格变化,保证了圆筒件拉深成形工序的顺利进行.%In view of has the flange cylinder drawing forming process, had determined various working procedures appropriate technological parameter, and unifies for the first time the drawing grid change, has guaranteed cylinder drawing forming working procedure smooth advance.

  8. Estudio Comparativo con prótesis total de rodilla de alta flexión. [Comparative ­study ­with ­high-flex ­total ­knee­ arthroplasty.

    Directory of Open Access Journals (Sweden)

    Matías Costa Paz

    2014-08-01

    Full Text Available In­tro­duc­ción: El objetivo de este trabajo comparativo fue analizar los resultados funcionales y el rango de movimiento de rodilla entre dos grupos de pacientes con artroplastia total de rodilla: uno utilizando prótesis de alta flexión y el otro con un diseño convencional. Materiales­ y ­Métodos: Setenta y cuatro pacientes fueron operados con artroplastia total de rodilla con prótesis de Zimmer NexGen®, EE.UU. Veintidós (grupo A fueron tratados con diseño de alta flexión. Dos con artritis reumatoide fueron excluidos. Cuarenta y dos pacientes fueron tratados con una convencional, 21 de ellos fueron excluidos, por lo que el grupo B estaba conformado por 21 pacientes. La evaluación funcional se realizó con el Knee Society Score (KSS, el Western Ontario and McMaster Universities osteoathritis index y la escala analógica visual. Resultados: El promedio de flexión máxima preoperatoria fue de 99º en el grupo A y de 106º en el grupo B. En el posoperatorio, el promedio de flexión máxima del grupo A subió a 114º, con un aumento promedio de 15º y, en el grupo B, a 118º con una ganancia promedio de 12º. No hubo diferencias estadísticamente significativas (p <0,05. El puntaje KSS preoperatorio del grupo A fue de 36/48 y mejoró a 90/92. En el grupo B, fue de 46/49 y de 94/90 en el posoperatorio. Conclusión: Las evaluaciones clínicas funcionales y radiológicas son favorables en los dos diseños de prótesis evaluados. Este estudio muestra que no hay diferencias significativas entre el rango de movimiento de una prótesis de alta flexión y una prótesis convencional luego de un año de seguimiento.

  9. Estudio por emisión acústica del comportamiento a flexión de recubrimientos WC-Co obtenidos por plasma atmosférico

    Directory of Open Access Journals (Sweden)

    Segovia, F.

    2007-12-01

    Full Text Available Plasma sprayed cermet coatings WC-Co are used in a wide range of industrial applications, mainly due to their wear resistance even in corrosive environments. The objective of this work is to analyze mechanical response of hard metal coatings by means of three- and four-points bend tests applying acoustic emission technique to determine failure critical strength. It has been observed the effect of supported charge level in structural damage by means of optical microscopy and scanning electron microscopy. Acoustic emission has allowed us to relate damage level to stresses level and then to understand coatings failure mechanism.

    Los recubrimientos de cermet WC-Co proyectados por plasma se utilizan en un amplio rango de aplicaciones industriales, principalmente por su resistencia al desgaste, incluso en medio corrosivo. El objetivo de este trabajo es analizar la respuesta mecánica de los recubrimientos de metal duro mediante ensayos de flexión a 3 y 4 puntos aplicando el método de emisión acústica para determinar las tensiones críticas de fallo. Se ha observado el efecto del nivel de carga soportado en el dañado estructural mediante microscopia óptica y electrónica de barrido. La emisión acústica ha permitido relacionar el grado de dañado con el nivel de tensiones y, así, entender el mecanismo de fallo de los recubrimientos.

  10. 参数化建模的螺栓法兰连接刚度分析%Stiffness analysis of bolted flange joint based on parameterized modeling

    Institute of Scientific and Technical Information of China (English)

    蒋国庆; 李家文; 唐国金

    2014-01-01

    为分析几何参数对螺栓法兰连接刚度的影响,用 MSC.Patran 软件的二次开发工具 PCL(Patran Command Language)建立了螺栓法兰连接的参数化模型。研究了螺栓法兰连接刚度随连接结构几何参数的变化规律并进行了灵敏度分析。经分析可知,连接结构刚度对开孔位置比例参数最敏感,其次是上法兰厚度。当上部段长度大于某一数值时,连接结构刚度对上部段长度参数不敏感,这一结论能为连接结构动力学简化建模提供一定理论参考。%In order to analyze the effects of geometric parameters on the stiffness of bolted flange joint,a parameterized model of bolted flange joint was constructed by using PCL (Patran Command Language)on the platform of software MSC.Patran.The law of the stiffness of bolted flange joint with the change of geometric parameters was studied,and the sensitivity of geometric parameters was analyzed based on the parameterized model.The results show that the ratio of the location of hole is the most sensitive factor to the stiffness of bolted flange joint,and the next one is thickness of upper flange.When the length of upper body is up to a const,the stiffness of bolted flange joint is insensitive to the length of upper body,and this conclusion can provide a reference to simplify the dynamic model of joint.

  11. Full-Scale Cyclic Testing of Deep Slender Wide-Flange Steel Beam-Columns under Unidirectional and Bidirectional Lateral Drift Demands

    OpenAIRE

    Elkady, Ahmed Mohamed Ahmed; Lignos, Dimitrios

    2017-01-01

    Deep and slender wide-flange steel beam-columns are commonly used in steel special moment frames (SMFs) in North America. These sections provide large moment-of-inertia required to satisfy the design code’s drift limits while keeping the column steel weight at minimum. Due to their low out-of-plane moment-of-inertia and high web and flange slenderness ratios, such sections are vulnerable to local and global geometric instabilities when subjected to lateral drift demands coupled with compressi...

  12. Caracterización mecánica de aleaciones Ti-Nb mediante ensayos de flexión biaxial

    Directory of Open Access Journals (Sweden)

    Amigó, V.

    2010-12-01

    Full Text Available Nowadays titanium and titanium alloys are increasingly being used in the industry. Particularly β-Ti alloys that stand out for having great strength properties and low elastic modulus compared to Ti c.p. or Ti-6Al-4V. Among Ti alloys, Ti-Nb alloys with high contents of alloying elements are widely used. In this work Ti-Nb alloys have been obtained using conventional powdermetallurgy. It has been studied the evolution of properties of these alloys as a function of the percentage of niobium. It can be noted the ball on three balls test used in order to characterize the samples.

    En la actualidad, cada vez, son más importantes en la industria las aleaciones de titanio. En especial las aleaciones tipo-β, que destacan por tener buenas propiedades resistentes y bajos módulos elásticos, en comparación con el Ti c.p. o el Ti-6Al-4V. Dentro de estas aleaciones cabe destacar las Ti-Nb con altos contenidos en elementos aleantes. En este trabajo se han obtenido, mediante pulvimetalurgia convencional, una serie de aleaciones Ti-Nb, en el rango del 20-40 % de niobio. Se ha obtenido la evolución de las propiedades de dichas aleaciones en función del porcentaje de niobio, mediante la utilización del ensayo de flexión biaxial con tres apoyos (three ball test.

  13. Airborne asbestos exposures associated with gasket and packing replacement: a simulation study of flange and valve repair work and an assessment of exposure variables.

    Science.gov (United States)

    Madl, Amy K; Devlin, Kathryn D; Perez, Angela L; Hollins, Dana M; Cowan, Dallas M; Scott, Paul K; White, Katherine; Cheng, Thales J; Henshaw, John L

    2015-02-01

    A simulation study was conducted to evaluate worker and area exposure to airborne asbestos associated with the replacement of asbestos-containing gaskets and packing materials from flanges and valves and assess the influence of several variables previously not investigated. Additionally, potential of take home exposures from clothing worn during the study was characterized. Our data showed that product type, ventilation type, gasket location, flange or bonnet size, number of flanges involved, surface characteristics, gasket surface adherence, and even activity type did not have a significant effect on worker exposures. Average worker asbestos exposures during flange gasket work (PCME=0.166 f/cc, 12-59 min) were similar to average worker asbestos exposures during valve overhaul work (PCME=0.165 f/cc, 7-76 min). Average 8-h TWA asbestos exposures were estimated to range from 0.010 to 0.062 f/cc. Handling clothes worn during gasket and packing replacement activities demonstrated exposures that were 0.71% (0.0009 f/cc 40-h TWA) of the airborne asbestos concentration experienced during the 5 days of the study. Despite the many variables considered in this study, exposures during gasket and packing replacement occur within a relatively narrow range, are below current and historical occupational exposure limits for asbestos, and are consistent with previously published data.

  14. 宽翼缘梁温差自应力级数解%Series solution of temperature difference self-stress in wide-flange beams

    Institute of Scientific and Technical Information of China (English)

    张元海; 李乔; 蔺鹏臻

    2011-01-01

    In order to reveal fully the distribution of the temperature difference self-stress in wide-flange beams and improve the conventional beam-based analysis method, a refined analytical method is presented which is based on the mechanics of elasticity. The flange and web plates are considered to be in a state of plane stress under temperature difference. The condition of the deformation compatibility and equilibrium at the connection of the flange and web plates is used to establish additional equations by which the constants of integration in the Airy stress function are evaluated. The analytical expressions of the temperature difference stress and displacement in the flange and web plates are derived. Numerical results of a wide-flange T-shape beam show that, the longitudinal self-stress in the flange plate under temperature difference to web plate is distributed very non-uniformly along its width. Greater stress occurs near the fixed edge while much smaller stress at the free edge in the flange plate. This distribution characteristic of the temperature difference self-stress can't be reflected by the conventional analytical method based on the beam theory.%为了充分反映宽翼缘梁的温差自应力分布特点,克服按梁理论计算温差自应力时的不足,本文从弹性力学的分析方法入手,按平面应力状态分析翼缘板和腹板的温差应力.根据翼缘板与腹板连接处的变形协调及平衡条件建立补充方程,求解艾瑞应力函数中的积分常数,导出翼缘板与腹板的温差应力及位移的解析式.对一宽翼缘T梁的计算表明,当翼缘板相对于腹板发生温差变化时,沿其宽度的纵向温差自应力分布很不均匀,在翼缘板根部较大而在悬臂端则显著减小,按通常基于梁理论的计算方法,无法反映这种应力分布规律.

  15. Magnetic Resonance Imaging (MRI) Markers for MRI-Guided High-Dose-Rate Brachytherapy: Novel Marker-Flange for Cervical Cancer and Marker Catheters for Prostate Cancer

    Energy Technology Data Exchange (ETDEWEB)

    Schindel, Joshua; Muruganandham, Manickam [Department of Radiation Oncology, University of Iowa, Iowa City, Iowa (United States); Pigge, F. Christopher [Department of Chemistry, University of Iowa, Iowa City, Iowa (United States); Anderson, James [Department of Radiation Oncology, University of Iowa, Iowa City, Iowa (United States); Kim, Yusung, E-mail: yusung-kim@uiowa.edu [Department of Radiation Oncology, University of Iowa, Iowa City, Iowa (United States)

    2013-06-01

    Purpose: To present a novel marker-flange, addressing source-reconstruction uncertainties due to the artifacts of a titanium intracavitary applicator used for magnetic resonance imaging (MRI)-guided high-dose-rate (HDR) brachytherapy (BT); and to evaluate 7 different MRI marker agents used for interstitial prostate BT and intracavitary gynecologic HDR BT when treatment plans are guided by MRI. Methods and Materials: Seven MRI marker agents were analyzed: saline solution, Conray-60, copper sulfate (CuSO{sub 4}) (1.5 g/L), liquid vitamin E, fish oil, 1% agarose gel (1 g agarose powder per 100 mL distilled water), and a cobalt–chloride complex contrast (C4) (CoCl{sub 2}/glycine = 4:1). A plastic, ring-shaped marker-flange was designed and tested on both titanium and plastic applicators. Three separate phantoms were designed to test the marker-flange, interstitial catheters for prostate BT, and intracavitary catheters for gynecologic HDR BT. T1- and T2-weighted MRI were analyzed for all markers in each phantom and quantified as percentages compared with a 3% agarose gel background. The geometric accuracy of the MR signal for the marker-flange was measured using an MRI-CT fusion. Results: The CuSO{sub 4} and C4 markers on T1-weighted MRI and saline on T2-weighted MRI showed the highest signals. The marker-flange showed hyper-signals of >500% with CuSO{sub 4} and C4 on T1-weighted MRI and of >400% with saline on T2-weighted MRI on titanium applicators. On T1-weighted MRI, the MRI signal inaccuracies of marker-flanges were measured <2 mm, regardless of marker agents, and that of CuSO{sub 4} was 0.42 ± 0.14 mm. Conclusion: The use of interstitial/intracavitary markers for MRI-guided prostate/gynecologic BT was observed to be feasible, providing accurate source pathway reconstruction. The novel marker-flange can produce extremely intense, accurate signals, demonstrating its feasibility for gynecologic HDR BT.

  16. Efecto de las variables de proceso sobre el comportamiento a flexión de aleaciones Ti - 3% at. X (X = Nb, Ta obtenidas por pulvimetalurgia

    Directory of Open Access Journals (Sweden)

    Franconetti, P.

    2013-12-01

    Full Text Available Niobium and tantalum are added to titanium alloys to form new beta alloys with higher biocompatibility for biomedical applications. Both elements have a high melting point, that is the reason for their limited solid state diffusion. In this work samples of titanium with 3% at. niobium and tantalum have been manufactured by powder metallurgy. The effect of the compacting pressure, temperature and the sintering time on the strength, elasticity and ductility in bending has been studied. The results show that both elements behave similarly: flexural strength increases between 20-25%, elasticity between 0-10% and ductility over 150%. Therefore, the addition of these elements is beneficial to mechanical properties. Statistical analysis shows that the effect of temperature and pressure are important, while the effect of time is insignificant and even harmful in these alloys.El niobio y el tantalio se añaden al titanio para formar nuevas aleaciones beta con mayor biocompatibilidad para aplicaciones biomédicas. Ambos elementos tienen un elevado punto de fusión, por lo que su difusión en estado sólido es limitada. En este trabajo se han fabricado por pulvimetalurgia muestras de titanio con 3% atómico de niobio o tantalio. Se estudia el efecto de la presión de compactación, la temperatura y el tiempo de sinterizado sobre la resistencia, la elasticidad y la ductilidad a flexión. Los resultados muestran que ambos elementos se comportan de manera semejante: aumenta la resistencia entre 20-25%, la elasticidad entre 0-10% y la ductilidad en más de un 150%. Por tanto, la adición de estos elementos es beneficiosa para las propiedades mecánicas. El análisis estadístico muestra que el efecto de la temperatura y presión son importantes mientras que el efecto del tiempo es poco significativo e incluso perjudicial en estas aleaciones.

  17. Evaluation of residual stresses in electron-beam welded Zr2.5Nb0.9Hf Zircadyne flange mock-up of a reflector vessel beam tube flange

    Energy Technology Data Exchange (ETDEWEB)

    Muránsky, O., E-mail: ondrej.muransky@ansto.gov.au [Institute of Material Engineering, ANSTO, Locked Bag 2001, Kirrawee DC, 2234 NSW (Australia); Holden, T.M. [Northern Stress Technologies, Deep River, Ontario, Canada K0J 1P0 (Canada); Kirstein, O. [European Spallation Source, EES AB, Tunavagen 24, SE-211 00 Lund (Sweden); James, J.A. [Open University, Materials Engineering, Milton Keynes MK7 6BJ (United Kingdom); Paradowska, A.M. [Bragg Institute, ANSTO, Locked Bag 2001, Kirrawee DC, 2234 NSW (Australia); Edwards, L. [Institute of Material Engineering, ANSTO, Locked Bag 2001, Kirrawee DC, 2234 NSW (Australia)

    2013-07-15

    The dual-phase alloy Zr2.5Nb alloy is an important nuclear material, because of its use in current and possible use in future nuclear reactors. It is, however, well-known that Zr2.5Nb weldments can fail through a time-dependent mechanism called delayed hydride cracking which is typically driven by the presence of tensile residual stresses. With a view to understanding the development of residual stresses associated with Zr2.5Nb welds the current study focuses on the evaluation of the residual stresses in a mock-up of a reactor beam tube flange made from Zr2.5Nb0.9Hf. The present results suggests that, like ferritic welds which undergo a solid-state phase transformation upon welding, Zr2.5Nb0.9Hf welds also develop high tensile residual stresses in the heat-affected zone whereas the stresses closer to the weld tip are reduced by the effects of the β → α solid-state phase transformation.

  18. Effects of Nb and V on the Precipitation Phases of MX in Q345E Applicable to Cryogenic Flange

    Science.gov (United States)

    Li, Jie; Fan, Dingdong; Xia, Yunjin

    2015-04-01

    Thermodynamic software (Thermo-Calc) is utilized to Q345E applicable to cryogenic flange. The aim is to study the equilibrium precipitation phases between 400 and 1600 °C, and the solubility of Nb and V in austenite. The effects of alloying elements, such as C, N, Nb and V, on these equilibrium precipitation phases are also discussed. Besides theoretical calculation, transmission electron microscopy (TEM) is used to observe these precipitation phases. The results show that main equilibrium precipitation phases are M7C3, MX#1 (Nb-rich), MX#2 (V-rich) and AlN. Among them, the MX#1 phase is composed of major elements (Nb, C, and N) and minor elements (V and Cr). For MX#2 phase, its major elements are V, C, Nb, and N, and minor element is Cr. The precipitation amount and temperature of MX#1 phase were controlled by Nb content, and little affected by the contents of C, N and V. TEM results reveal that the size of precipitation phases varied from several nanometers to more than 100 nm. Large precipitation particles belong to MX#1 phase (Nb-rich), and their morphology tends to be cubic. On the other side, the small precipitation particles are attributed to MX#2 phase (V-rich), and their morphology is spherical or elliptical. These results are consistent with the thermodynamic calculation results about phase composition and precipitation temperature of MX#1 and MX#2.

  19. The construction of the CMS electromagnetic calorimeter: delivery of the 3rd and 4th endcap "Dees" and Ring Flanges to CERN

    CERN Multimedia

    2006-01-01

    Delivery of the 3rd and 4th Dees and Ring Flanges of the CMS-ECAL endcaps to CERN. The pictures show also an endcap crystal with its VPT (Vacuum PhotoTriode), the aluminium blackplates of the endcap Dees and four mock supercrystals (5x5 crystals) attached in their position on the backplate, along with 138 positional spacers. Finally, endcap assembly in the CMS construction hall in Cessy (neighbouring France) is also shown.

  20. 盾构刀盘支撑法兰密封位磨损修复技术%Repairing of Abrasion on Sealing Position of Shield Cutter Flange

    Institute of Scientific and Technical Information of China (English)

    张洪涛; 郑国良; 刘景华; 王太平

    2012-01-01

    盾构刀盘支撑法兰位于切口环内,主要作用是将刀盘与主驱动连接起来,驱动刀盘的旋转.盾构刀盘支撑通过法兰盘与主驱动齿轮相连,刀盘在旋转过程中连接的密封位极易进入泥砂,长期旋转过程中容易造成密封位的磨损,因此法兰盘在掘进一定距离后必须进行检查、修复.某法兰盘为宽740mm,中心直径2 740mm的圆环,并连接6个牛腿.为防止该法兰盘的变形,采取镶嵌钢环加补焊的修复工艺,达到了法兰盘变形量小、平面精度高的目的.%The cutter flange locates in incision ring of shield which main function is connecting the cutter and main driver to operate the cutter. Because the shield cutter and main driver gears is connected with the flange, so the sediment is easy to enter the sealing position during cutter rotation. The sealing position always abrades during long-term rotating of shield cutter. Thus the flange should be checked and repaired when shield run a certain distance. Some flange connects 6 corbels with 740mm-wideth and 2 740mm-diameter. Repairing technology of inlaying steel ring and welding is adopted to control the deformation and plan accuracy.

  1. DRAFT One Year Extension of the Short-Term National Product Waiver for Stainless Steel Nuts and Bolts used in Pipe Couplings, Restraints, Joints, Flanges and Saddles for State Revolving Fund Projects

    Science.gov (United States)

    DRAFT one year extension of the short-term national product waiver for stainless steel nuts and bolts used in pipe couplings, restraints, joints, flanges and saddles for State Revolving Fund projects.

  2. Finite Element Analysis on Belleville Spring in Flanged Joints%法兰接头用碟形弹簧的有限元分析

    Institute of Scientific and Technical Information of China (English)

    王俊和

    2015-01-01

    Normal belleville spring and belleville spring used in flanged joints are simulated through 2-D finite element analysis and the friction effect on the load of the belleville spring used in flanged joints is considered. The results show that the fraction has intense impact on the rigidity of the belleville spring used in flanged joints which is quite significant in the design process.%利用2-D有限元法模拟了普通碟形弹簧和法兰接头用碟形弹簧, 并考虑了摩擦对法兰接头用碟形弹簧承载的影响. 结果表明, 有限元法对碟簧的模拟十分精确. 此外, 摩擦对法兰接头用碟形弹簧的刚度影响较大, 这在设计过程中不容忽视.

  3. Flexión y compresión compuestas en secciones rectangulares. Método en rotura del momento tope

    Directory of Open Access Journals (Sweden)

    Jiménez Montoya, P.

    1963-09-01

    Full Text Available This is a systematic summary of studies on rectangular sections subjected to compound loading and bending, calculated by the method of ultimate bending moment. The studies are part of the work which the author is preparing on reinforced and prestressed concrete. The method of ultimate bending moment, which is based on the rheological properties of concrete and on the new concepts of safety factors, has been accepted by the European Committee on Concrete (C. E. B. after being proposed by the Spanish Committee. It is very useful, since it is a simple procedure, and is also closer to reality than the classical methods. Also, this is the method of calculation adopted m the recent Specification H. A. 61, for reinforced concrete structures, issued by the Instituto Eduardo Torroja. The object of this paper is to give an account of the ultimate bending moment method, by establishing the equilibrium and compatibility equations, and applying them to the various design and calculation problems that most often arise. To simplify the task of the calculating technician, a number of monograms have been constructed, which are easy to operate. Only two of these are given in this paper, in order to limit the length of the latter.Constituye este trabajo un resumen ordenado del estudio de secciones rectangulares sometidas a flexión o compresión compuesta, por el método del momento tope, que forma parte de la obra que el autor tiene en preparación sobre hormigón armado y pretensado. El método del momento tope, basado en las propiedades reológicas del hormigón y en los nuevos conceptos del coeficiente de seguridad, ha sido admitido por el Comité Européen du Béton (C. E. B., a propuesta de la Comisión española, y es de mucha utilidad por constituir un procedimiento muy sencillo, y a la vez más de acuerdo con la realidad, que los métodos clásicos. Por otra parte, este es el método de cálculo adoptado por la reciente Instrucción H. A. 61, especial

  4. Experimental and numerical determination of the creep and relaxation behaviour of high-temperature, flanged pipe joints; Experimentelle und numerische Ermittlung des Kriech- und Relaxationsverhaltens von Hochtemperaturrohrflanschen

    Energy Technology Data Exchange (ETDEWEB)

    Purper, H.; Koenig, H.; Maile, K.

    1998-09-01

    The creep-induced deformation behaviour of three near-to-practice flanged pipe joints on a scale of 1:2.5 has been experimentally and numerically examined. The experimental results reveal the curve of plastic (creep) deformation in the bolts or flanged joints as a function of time or location, so that it is possible to assess the integral behaviour of the flanged pipe joints. It is shown that the stress reduction in the pre-stressed bolts describes a similar curve for all the materials examined: After a relatively steep decrease over a short term of about 500 h, the curve flattens and describes a quasi-stable state with only minor changes in velocity. If calculations for modelling of the time-dependent materials behaviour can rely on a sufficiently comprehensive database and if the material laws can be formulated with sufficient accuracy for the entire stress range under examination, the FE calculations will yield a correspondingly accurate description of the time-dependent stress development as a function of degree of deformation of the flanged area (eg. angle between pipe and flange disk). This method in addition yields information on the entire deformation, the creep-induced deformation, and elastic deformation. (orig./CB) [Deutsch] Im Rahmen des Vorhabens wurde das Verformungsverhalten von drei verschiedenen praxisnahen Rohrflanschverbindungsmodellen im Massstab 1:2,5 im Kriechbereich experimentell und numerisch untersucht. Die experimentellen Untersuchungen zeigten den Verlauf der plastischen (Kriech-) Verformungen in den Schrauben bzw. Flanschkoerpern in Abhaengigkeit von der Zeit bzw. des Ortes. Damit war es moeglich, das integrale Verhalten der untersuchten Flansche zu beurteilen. Es zeigte sich, dass der Spannungsabbau der Vorspannung in den Schrauben bei allen verwendeten Werkstoffen einen aehnlichen Verlauf zeigt: Nach relativ steilem Abfall im Kurzzeitbereich bis ca. 500 h, nimmt der Gradient der Steigung ab und es stellt sich ein quasistabiler Zustand

  5. Numerical simulation of the seismic behavior of self-centering steel beam-column connections with bottom flange friction devices

    Science.gov (United States)

    Guo, Tong; Song, Lianglong; Zhang, Guodong

    2011-06-01

    A new type of steel moment resisting frame with bottom flange friction devices (BFFDs) has been developed to provide self-centering capacity and energy dissipation, and to reduce permanent deformations under earthquakes. This paper presents a numerical simulation of self-centering beam-column connections with BFFDs, in which the gap opening /closing at the beam-column interfaces is simulated by using pairs of zero-length elements with compression-only material properties, and the energy dissipation due to friction is simulated by using truss elements with specified hysteretic behavior. In particular, the effect of the friction bolt bearing against the slotted plate in the BFFDs was modeled, so that the increase in lateral force and the loss of friction force due to the bolt bearing could be taken into account. Parallel elastic-perfectly plastic gap (ElasticPPGap) materials in the Open System for Earthquake Engineering Simulation (OpenSees) were used with predefined gaps to specify the sequence that each bolt went into the bearing and the corresponding increase in bending stiffness. The MinMax material in OpenSees is used to specify the minimum and maximum values of strains of the ElasticPPGap materials. To consider the loss of friction force due to bolt bearing, a number of parallel hysteretic materials were used, and the failure of these materials in sequence simulated the gradual loss of friction force. Analysis results obtained by using the proposed numerical model are discussed and compared with the test results under cyclic loadings and the seismic loading, respectively.

  6. Efecto del estiramiento estático de 15, 30 y 60 segundos sobre el rango de movimiento de la flexión de cadera con rodilla extendida

    Directory of Open Access Journals (Sweden)

    Claudia Lucía Ariza-García

    2016-08-01

    Full Text Available Objetivo: Evaluar el efecto de tres duraciones de estiramiento estático pasivo, 15, 30 y 60 segundos (s para aumentar el rango de movimiento de la flexión de cadera (ROM-FC. Metodología: Ensayo Clínico Controlado Aleatorizado. Nueve estudiantes mujeres (21,7 ± 4,3 años fueron asignadas aleatoriamente a tres grupos, 15 (G15, 30 (G30 y 60 (G60 s; n = 3 en cada grupo. El estiramiento de la musculatura isquitotibial se realizó en decúbito supino, máxima flexión de cadera, rodilla extendida y dorsiflexión de pie con ayuda de una banda elástica; dos veces consecutivas en ambos miembros inferiores, tres veces/semana, por tres semanas. El resultado principal fue el cambio del ROM-FC izquierda y derecha al finalizar la intervención. Se usó la prueba t de student y el análisis ANOVA. Resultados:  Las diferencias entre evaluaciones en G15 y G30 fueron estadísticamente significativas para el miembro inferior derecho. No se encontraron diferencias significativas en el grupo G60 del hemicuerpo derecho ni en grupo alguno del hemicuerpo izquierdo. Tampoco para el aumento de ROM-FC entre los tres grupos ni entre hemicuerpos. Conclusión: El estiramiento estático pasivo de 15 y 30 s de duración fue efectivo para aumentar el ROM-FC derecho. Se requieren futuros estudios con un tamaño de muestra adecuado para detectar diferencias en el aumento del ROM-FC según duración del estiramiento y hemicuerpos.

  7. Capacidad Resistente a Flexión y Cortante de Vigas de Acero Mediante la Aplicación Mathcad Flexure Resistance and Shear Capacity of Steel Beams using Mathcad

    Directory of Open Access Journals (Sweden)

    R. Cedeño-Rosete

    2005-01-01

    Full Text Available Se presenta la implementación de un programa de cómputo para determinar la capacidad resistente a flexión y cortante de perfiles de acero. La metodología se basa en el criterio de diseño Factores de Carga y Resistencia establecida en el reglamento del Instituto Americano de Construcción en Acero (AISC. Se generan hojas de cálculo en la aplicación Mathcad de fácil utilización. Se plantean dos ejemplos de vigas de acero obteniendo su capacidad resistente a flexión y cortante para cargas uniformes y concentradas y se comparan los resultados con las acciones últimas especificadas. El programa también cumple las funciones de diseño estructural permitiendo al usuario obtener el perfil más económico para la solución de un problema. La aplicación resulta ser un material de interés práctico profesional y de utilidad didáctica para cursos de diseño en acero.A computer program was developed to determine the flexure and shear resistance capacity of steel beams. The methodology was based on the Load Resistance Factor Design (LRFD criteria of the American Institute of Steel Construction code (AISC. Easy to use working spreadsheets were developed using Mathcad. Two examples are solved for steel beams subjected to uniform and concentrated loads, comparing their flexural and shear resistance capacities under these loads. The program also fulfills structural design features allowing the user to obtain the most economic steel shape to solve a problem. The resultant application is of practical professional interest and also serves as additional teaching material in courses of steel design.

  8. Elastic-Plastic Fracture Mechanics Analysis of Critical Flaw Size in ARES I-X Flange-to-Skin Welds

    Science.gov (United States)

    Chell, G. Graham; Hudak, Stephen J., Jr.

    2008-01-01

    NASA's Ares 1 Upper Stage Simulator (USS) is being fabricated from welded A516 steel. In order to insure the structural integrity of these welds it is of interest to calculate the critical initial flaw size (CIFS) to establish rational inspection requirements. The CIFS is in turn dependent on the critical final flaw size (CFS), as well as fatigue flaw growth resulting from transportation, handling and service-induced loading. These calculations were made using linear elastic fracture mechanics (LEFM), which are thought to be conservative because they are based on a lower bound, so called elastic, fracture toughness determined from tests that displayed significant plasticity. Nevertheless, there was still concern that the yield magnitude stresses generated in the flange-to-skin weld by the combination of axial stresses due to axial forces, fit-up stresses, and weld residual stresses, could give rise to significant flaw-tip plasticity, which might render the LEFM results to be non-conservative. The objective of the present study was to employ Elastic Plastic Fracture Mechanics (EPFM) to determine CFS values, and then compare these values to CFS values evaluated using LEFM. CFS values were calculated for twelve cases involving surface and embedded flaws, EPFM analyses with and without plastic shakedown of the stresses, LEFM analyses, and various welding residual stress distributions. For the cases examined, the computed CFS values based on elastic analyses were the smallest in all instances where the failures were predicted to be controlled by the fracture toughness. However, in certain cases, the CFS values predicted by the elastic-plastic analyses were smaller than those predicted by the elastic analyses; in these cases the failure criteria were determined by a breakdown in stress intensity factor validity limits for deep flaws (a greater than 0.90t), rather than by the fracture toughness. Plastic relaxation of stresses accompanying shakedown always increases the

  9. COMPARATIVE PERFORMANCE STUDY OF GASKETED AND NON-GASKETED FLANGE JOINTS UNDER COMBINED INTERNAL PRESSURE, AXIAL AND BENDING LOADING – AN EXPERIMENTAL STUDY

    Directory of Open Access Journals (Sweden)

    Muhammad Abid

    2010-11-01

    Full Text Available In this paper result of an extensive comparative experimental study of a gasketed and non-gasketed flange joint with different assemblies with different combined load combinations is carried out to investigate joint performance i.e. joint strength and sealing capability. Actual joint load capacities are determined under both the design and proof test pressure with maximum additional external loading (axial and bending that can be applied for safe joint performance. In addition, application of combined load is also discussed in the light of equivalent pressure approach.

  10. Drilling Reamer Modification for Reducing Defects of Flange' s Inner Hole%缸盖内孔扩孔锪钻改进

    Institute of Scientific and Technical Information of China (English)

    汤坤; 侯克忠; 徐春阳

    2011-01-01

    In the condition of existing product line,the main reason of the grinding defects of the H-type flang's inner hole is the swing caused by enlarging inner holes with four-Hade welding carbide reamer.That affects the quality of the compressor assembly. The design of the staged compound drilling reamer has been improved.The way of two-step eight-blade drilling improved the situation and stability of single-edged culling, the defective rate of grinding H-type flange inner hole decreases from above 0.8% to 0.2% .%在现有生产线的条件下,4刃焊接硬质合金锪钻内孔扩孔加工时易“摆动”是造成H型上缸盖内孔研磨不良的主要原因,影响了主机厂压缩机装配质量.改进设计了阶梯式复合锪钻,两节8刃切削方式改善了单边切削状况、提高了切削稳定性,H型上缸盖内孔研磨不出的不良率由0.8%以上下降到0.2%.

  11. Effect of active stretching on hip flexion range of motion: 15 versus 30 seconds Efecto del estiramiento activo sobre el rango de movimiento de la flexión de cadera: 15 versus 30 segundos

    Directory of Open Access Journals (Sweden)

    P. Sainz de Baranda

    2010-09-01

    Full Text Available

    The main purpose of the present study was to examine the efficacy of 12-weeks active stretching program to improve hip flexion range of motion in young adults, as son as evaluate the efficacy of two different stretching durations: 15 and 30 second. A total of 82 subjects young adults volunteer (57 men and 25 women were the participants in this study. The participants were distributed by means of counterbalance in two stretching groups: a first group of 15 seconds of stretching duration (n=35, a second group with 30 seconds of stretching duration (n=47. Straight leg raise test (SLR. Was used to assess the hip flexion range of motion. Results showed that the active stretching technique was effective to increased hamstring flexibility independently of the stretching duration (p<0,05. Not significant differences were found between the different stretching groups (p>0,05. Conclusion: The active stretching technique is effective to improve hip flexion range of motion, being equal of effective 15 and 30 seconds of stretching duration.
    Key Words:Hamstring, Flexibility, Range of motion, Active Stretching, Stretching duration.

    El objetivo principal de este estudio fue valorar la eficacia de un programa de estiramientos activos con una duración de 12 semanas para aumentar el rango de movimiento de la flexión de cadera en adultos jóvenes, así como comparar la eficacia de dos duraciones diferentes del estiramiento, 15 y 30 segundos. La muestra estuvo compuesta por un total de 82 sujetos adultos jóvenes sanos voluntarios (57 Hombres y 25 Mujeres. La muestra fue distribuida mediante contrabalanceo en dos grupos de trabajo; un primer grupo de 15 segundos de duración del estiramiento (n=35, un segundo grupo con 30 segundos de duración del mismo (n=47. Para valorar el rango de movimiento de la flexión de cadera se utilizó el test angular

  12. Analysis of Welding Deformation Prevention and Control of Tower Flange and Cylinder%风力发电塔架法兰与筒体焊接变形预防控制技术分析

    Institute of Scientific and Technical Information of China (English)

    高永君; 刘坚宏; 张斌; 席嘉伟; 马志文

    2014-01-01

    风力发电塔架法兰与筒体焊接时,法兰平面易产生“角变形”,致使法兰平面度、内倾度、法兰椭圆度超标,为了预防和控制法兰变形,故在法兰采购时预留内倾量,并在焊接采用对把焊接,在两法兰之间夹垫片用螺栓紧固,严控焊接顺序。该方法可很好地控制法兰平面度、内倾度变形。此控制方法已在工程中得到应用,收获了很好的经济效果。%Tis paper provided the prevention and control of welding deformation of wind power tower fange and cylinder, wind power tower flange and cylinder welding.The flange plane is easy to produce"angular deformation".Thus, the flange flatness negative camber exceeded the standard fange ellipticity. In order to prevent and control the deformation of fange, the reserved introverted in flange procurement (welding deformationamount), and a pair of flanges on the welding in welding, clamping pad between two fanges and fxed by fastening bolts, strict control of welding sequence and a welding. Te technical measures can meet the requirements of inner flange flatness, inclination, and the control method has been applied in the engineering, and gains good results.

  13. Influencia del contenido de finos del hormigón en la respuesta estructural a flexión y cortante de vigas de hormigón armado

    Directory of Open Access Journals (Sweden)

    Ferreira, D.

    2015-09-01

    Full Text Available This paper presents an experimental study on the flexural and shear behavior of reinforced concrete beams with a fines content (275 kg/m3 higher than the limit value allowed by the Spanish Concrete Code EHE-08 (175 kg/m3. In the studied range, the fines content scarcely affected the flexural response. The shear strength of the beams with a high content of fines was lower than that of the beams cast with conventional concrete, especially for those with a high longitudinal internal reinforcement ratio and with transversal stirrups, where the reduction of the ultimate load was up to 23 %. Such a reduction is considered due to the reduction of mechanical properties of concrete and that of the aggregate interlock along the crack length. Finally, the experimental results have allowed verifying a numerical model for the non-linear analysis of RC members to accurately predict the influence of the amount of fine aggregate on the structural response.Este artículo presenta un estudio experimental sobre el comportamiento a flexión y cortante de vigas de hormigón armado con un contenido de finos (275 kg/m3 superior al límite permitido por la Instrucción EHE-08 (175 kg/m3. En el rango estudiado, el contenido de finos apenas afectó a la respuesta a flexión. La resistencia a cortante de vigas con alto contenido de finos fue menor que la de las vigas de hormigón convencional, en especial para las vigas con cuantía alta de armadura longitudinal y con armadura de cortante, con una reducción de hasta el 23 % en la carga última. Esta reducción se considera debida a la disminución de propiedades mecánicas del hormigón que afecta especialmente al cortante resistido por fricción en la fisura. Por último, los ensayos realizados han permitido verificar un modelo numérico de análisis no lineal evolutivo para predecir el comportamiento de estructuras de hormigón con distintos contenidos de finos.

  14. Finite element analysis and fracture resistance testing of a new intraradicular post

    Directory of Open Access Journals (Sweden)

    Eron Toshio Colauto Yamamoto

    2012-08-01

    Full Text Available OBJECTIVES: The objective of the present study was to evaluate a prefabricated intraradicular threaded pure titanium post, designed and developed at the São José dos Campos School of Dentistry - UNESP, Brazil. This new post was designed to minimize stresses observed with prefabricated post systems and to improve cost-benefits. MATERIAL AND METHODS: Fracture resistance testing of the post/core/root complex, fracture analysis by microscopy and stress analysis by the finite element method were used for post evaluation. The following four prefabricated metal post systems were analyzed: group 1, experimental post; group 2, modification of the experimental post; group 3, Flexi Post, and group 4, Para Post. For the analysis of fracture resistance, 40 bovine teeth were randomly assigned to the four groups (n=10 and used for the fabrication of test specimens simulating the situation in the mouth. The test specimens were subjected to compressive strength testing until fracture in an EMIC universal testing machine. After fracture of the test specimens, their roots were sectioned and analyzed by microscopy. For the finite element method, specimens of the fracture resistance test were simulated by computer modeling to determine the stress distribution pattern in the post systems studied. RESULTS: The fracture test presented the following averages and standard deviation: G1 (45.63±8.77, G2 (49.98±7.08, G3 (43.84±5.52, G4 (47.61±7.23. Stress was homogenously distributed along the body of the intraradicular post in group 1, whereas high stress concentrations in certain regions were observed in the other groups. These stress concentrations in the body of the post induced the same stress concentration in root dentin. CONCLUSIONS: The experimental post (original and modified versions presented similar fracture resistance and better results in the stress analysis when compared with the commercial post systems tested (08/2008-PA/CEP.

  15. Flexión biaxial de las columnas esbeltas de concreto en alta resistencia y los tubos llenos de concreto bajo cargas a corto y largo plazo: II Verificación

    Directory of Open Access Journals (Sweden)

    Jose A. Rodríguez-Gutiérrez

    2014-12-01

    Full Text Available En un artículo adjunto se presenta el método analítico para calcular las respuestas, a corto y largo plazo, de las columnas esbeltas de concreto en alta resistencia (HSC y de los tubos rellenos de hormigón; con condiciones de apoyo generalizados, sometidos a cargas transversales de luz y a cargas axiales excéntricas en los extremos (causando curvatura simple o doble bajo flexión uniaxial o biaxial.Los tipos de columnas que pueden ser analizadas son: ovaladas, rectangulares, circulares, C, T, L o de cualquier sección transversal arbitraria, sólida o hueca, además, las que están hechas de tubos de acero circulares y rectangulares llenos de concreto en alta resistencia. En esta publicación se presenta la validez del método y los resultados obtenidos son comparados con otros, que han sido reportados por diferentes investigadores en la literatura técnica, con más de setenta muestras de columnas.

  16. 覆砂铁型铸造生产球铁法兰主轴%Main Bearing with Flange Produced by Permanent Die Coated with Sand

    Institute of Scientific and Technical Information of China (English)

    董琪; 顾厚军; 史传岳; 钟晓斌

    2014-01-01

    把原粘土砂湿型生产法兰主轴铸件的工艺改为覆砂铁型工艺,解决了内部缩松等一系列缺陷问题。与原工艺相比,实现了覆砂铁型工艺的“多、快、好、省”。%Problems as defects of inner shrinkage etc in castings of main bearing with flange have been solved when the former technology of clay green sand molding has had been changed to technology of permanent die coated with sand of which the advantages have been much output, quicker, better and cost saved.

  17. Comparação de modelos de análise das normas ASME e EN 1591 para o projeto de flanges com juntas circulares

    OpenAIRE

    Lima, Ivo Andrei de Oliveira Lino

    2005-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Mecânica Existem vários métodos analíticos que apresentam modelos para determinar os esforços atuantes no flange em função de uma determinada carga de aperto necessária para vedação da conexão e em função da pressão interna e de outras forças atuantes. Foram selecionados três dos principais métodos analíticos aplicados em projeto de vasos e tubulações industriais: o ...

  18. DESIGN AND REALISATION OF MODELLING AND FINITE ELEMENT DIVISION ON SHIP FLANGED BRACKET%船舶折边肘板建模与有限元划分的设计与实现

    Institute of Scientific and Technical Information of China (English)

    许一敏; 冷文浩; 周炜; 田志峰; 程成

    2013-01-01

    Bracket is a common component for connection in ship structure and other steel structures,and flanged bracket is frequently used in flanged docking for main ship components.In order to enhance the efficiency of modelling flanged bracket,we design the parametric 3D solid modelling process for flanged bracket.According to the modelling process,we discuss the methods of parametric bracket contour generation and flanges information storage,provide the algorithms for coordinate transformation and flange rotation,and study the objectoriented programming and finite element method.Moreover,we import MSC.Patran for mesh division,realise the transformation from CAD model to finite element analysis model,and present PDM integration.Taking AutoCAD as the development platform,VS.Net as the programming environment,and ObjectARX as the development tool,we implement the object-oriented parametric solid modelling system for flanged bracket.%肘板是船舶结构及其它钢结构中常用的连接构件,折边肘板经常用于船舶主构件的折边对接中.为了提高折边肘板建模的效率,设计折边肘板参数化三维实体造型过程;根据造型过程,探讨肘板轮廓参数化生成及折边信息存储方法;给出坐标转换及折边旋转算法;研究面向对象与有限元方法;并导入MSC.Patran进行网格划分,实现CAD模型到有限元分析模型的转化;给出PDM的集成:以AutoCAD为开发平台,VS.Net为编程环境,ObiectARX为开发工具,实现了面向对象的折边肘板参数化实体造型.

  19. Study and application on checking method of tower equipment connecting flanges%塔设备连接法兰的校核方法研究及应用

    Institute of Scientific and Technical Information of China (English)

    刘万朋; 施哲雄; 何荣娥; 周阳

    2012-01-01

    To solve the reliability problem of flange connection which is caused by the corrosion of tower equipment in the petrochemical industry and to decrease the accident rate in producing process, the finite element checking method of flange was discussed. Combined with the analysis of engineering project example, a finite element method was put forward to test the intensity and rigidity of the flanges under the combined action of internal and external loads. This method overcame the disadvantages that the check and design standards of flanges only considered the calculation of intensity regardless of the impact of external loads: Firstly, the intensity of the flange connection system was checked to ensure the intensity requirement. Secondly, the sealing characteristic of the flange was calculated, and the leakage situation and trends were predicted according to the stress distribution of the gasket. Finally, a finite element analysis process for pre-judgment of the flange leakage was presented.%为了解决石化行业中塔设备连接法兰腐蚀后的连接可靠性问题,降低生产过程中的事故发生概率,对法兰校核方法进行了研究,并结合工程实例,提出了用有限元软件AxiPRO对法兰连接系统在内外载荷共同作用下的强度和刚度校核方法,克服了法兰设计校核标准中不考虑外部载荷的影响和只进行强度计算的弊端.首先对法兰连接系统进行强度校核,通过等效应力原则确定连接系统中的危险区域,考核其是否满足强度要求;然后对法兰密封性进行了计算,根据垫片应力分布情况推断法兰的泄漏情况及泄漏趋势,最后给出了法兰泄漏预判断的有限元分析方法流程.

  20. Research on the Generation Factors of Oversprayed Flange in Injection Molding of Vehicle Glass with Embedded Glass%汽车玻璃塑料包边成型的溢边影响因素研究

    Institute of Scientific and Technical Information of China (English)

    王乾廷; 刘琼; 刘贤平; 陈文哲

    2012-01-01

    Vehicle glass with embedded glass is produced by injection molding around the glass boundary, which is composed of the glass and plastics. Aiming at the defect of oversprayed flange in the processing, quantitative research has been carried out on the reasons and controlling methods of the existence of suili defect. Based on the simplified model of the oversprayed flange, the quantificational relation between the length of the flange and the material properties and the processing parameters is set up. According to the experimental model, the injection molding experiments are, performed with different processing parameters, in which the pressure, temperature distribution near the gas vent are obtained under different conditions and the flange sizes are also measured. The functional relation between the parameters of processing and venting sizes and the flange is analyzed. The results show that the length of ihe flange is proportional to the square of the gas vent clearance and the influence of temperature and pressure on the flange is relatively little.%针对汽车塑料包边玻璃在注塑中易产生溢边缺陷的问题,定量研究了溢边产生的原因和控制方法.以塑料溢边简化模型为基础,建立了溢边长度与塑料材质和工艺参数之间的定量关系;以试验模型为对象,在不同成型参数下分别进行注塑试验,测定了不同工况下产生溢边的气孔处压力和温度分布以及溢边的儿何尺寸;分析了成型参数和气孔参数与溢边形成之间的函数关系.结果表明,溢边长度与气孔间隙平方成正比,而温度和压力等参数的影响较小.

  1. Improvement of the Geometrical Stability of the LHC cryodipoles when Blocking the Central Support Post

    CERN Document Server

    Seyvet, Fabien; Fernandez-Cano, Elena D; Jeanneret, Jean Bernard; Poncet, Alain; Tommasini, Davide

    2005-01-01

    The LHC will be equipped with 1232 horizontally curved 16 meter long super-conducting dipole magnets cooled at 1.9 K, supported within their vacuum vessel by three Glass Fiber Resin Epoxy (GFRE) support posts. The two support posts at the dipole extremities were initially designed free to slide longitudinally with respect to the vacuum vessel and the central support post free to slide transversely. However the magnet shape did not retain the tight geometrical tolerances, of the order of fractions of mm, imposed by machine aperture and magnetic corrector centering requirements. Thereafter a modification to the supporting system, removing the initial transversal degree of freedom of the lower flange of the central support post with respect to the vacuum vessel, was designed and implemented. This paper describes the design of the magnet/cryostat interface with and without blockage of the central support post, analyzes the additional mechanical loads related to the modification and reviews the experimental resul...

  2. Clasificación de las secciones rectangulares de hormigón armado por los criterios de cálculo: compresión, interpolaciones y flexión. (Instrucción EH-73

    Directory of Open Access Journals (Sweden)

    Navarro Gutiérrez, Julián

    1978-10-01

    Full Text Available In every case of design of a reinforced concrete rectangular section element, it is possible to readily determine two quantities, which taken as x-y coordinates will define a point, these numbers being taken from the initial Information previous to the actual calculations. The position of such point in the plot indicates the equation system to be used in the calculation of the section. When compatibility occurs there are four possibilities: compression (single of multiple, interpolated compression, interpolated deflection and deflection (single or multiple. To each of these possibilities corresponds a given finite or infinite space in the plot In order to obtain the limits of these spaces, one must first chose the ρ = coefficient of the reinforcement covering. sc = concrete ultimate modulus. Almost all common design and calculation cases are grouped as follows: I. Determination of a section where the width b is known and the height d is unknown. II. Determination of sections where both b and d are known. If the ρ and s sc values have been previously established, each of the above groups will have its own given plotted graph.

    En cualquier caso de cálculo de una sección rectangular de hormigón armado, a partir de sus datos y antes de hacer el correspondiente cálculo, es posible determinar fácilmente dos números que, adoptados como coordenadas, determinan un punto. La situación de este punto en su plano de representación Indica el sistema de ecuaciones que ha de ser utilizado para el cálculo de la sección. En los casos de compatibilidad hay cuatro posibilidades: compresión (simple o compuesta, compresión interpolada, flexión interpolada y flexión (simple o compuesta. Corresponde a cada una de estas posibilidades un determinado recinto, finito o infinito, en el plano de representación. Para obtener los contornos de estos recintos es necesario previamente elegir el valor del parámetro

  3. Propuesta de diseño de morteros para el mantenimiento, conservación y reparación de edificaciones basados en su resistencia a flexión y compresión.

    Directory of Open Access Journals (Sweden)

    Argelio Vázquez Rodríguez

    2014-01-01

    Full Text Available Los morteros diseñados para el mantenimiento, conservación y reparación de edificaciones se realizaron con cemento PP-25, arena y polvo de piedra de la cantera Planta Libertad de la provincia de Matanzas, basándose en las recomendaciones de las normas cubanas. Entre los métodos de investigación utilizados está la experimentación y métodos asociados a la matemática. Para ello se caracterizó la arena y polvo de piedra mediante la medición de sus propiedades geométricas y físicas. Se realizaron roturas a los 28 días a los morteros elaborados para medir su resistencia a flexión y compresión. Los resultados obtenidos mostraron que el árido no cumple con las especificaciones en cuanto a la granulometría dadas por el suministrador del material y los morteros diseñados presentan valores de resistencia a compresión por encima de los estipulados. Las variaciones de resistencia están dadas por la cantidad de agua, los finos en la mezcla y la cantidad de cemento. Se realizó un análisis “costo-beneficio” y se propuso una solución para resolver la problemática existente, seguido de la recomendación de diseñar nuevamente los morteros con los nuevos resultados.

  4. La flexión en hormigón armado con cuantías supracríticas, según la instrucción h. a. 61

    Directory of Open Access Journals (Sweden)

    Gratzer, Otto

    1964-04-01

    Full Text Available This paper comments the method of determining stresses in rectangular beams under bending loads, when the beams are fitted with simple, supercritical reinforcement, and when the calculation method is in accordance with Reinforced Concrete Specification h. a. 61, based on ultimate loads. In this case the compression zone, assuming a uniformly distributed compression stress, is more than hall of the effective depth of the section. Hence the failing stress of the concrete, and the depth of the compression zone, are not known a priori. The study of this case involves two stages: 1 exact theoretical calculation, 2 practical simplification of the resulting formulae.Se comenta la determinación de esfuerzos en vigas rectangulares sometidas a flexión, con armadura simple, supracrítica, aplicando las fórmulas de cálculo en rotura de la Instrucción de Hormigón Armado h. a. 61. En estos casos, la profundidad de la zona comprimida de la sección (en el supuesto de tensión uniformemente repartida es mayor de la mitad del canto útil, por lo que no se conocen «a priori» la tensión de rotura del hormigón ni la profundidad de la zona comprimida. La consideración de este caso se divide para su análisis en dos partes: 1. Cálculo teórico exacto y 2. Simplificación práctica de las fórmulas obtenidas.

  5. Evaluación de la resistencia teórica a la flexión de tres instrumentos utilizados en endodoncia mediante análisis de elementos finitos / Theoretical Evaluation through Finite Element Analysis of Flexural Strength of three Instruments used in Endodontics

    OpenAIRE

    Prieto Cárdenas, Sandra Milena; Universidad Nacional de Colombia, Bogotá; Cortés Rodríguez, Carlos Julio; Universidad Nacional de Colombia, Bogotá; Gamboa Martínez, Luis Fernando; Universidad El Bosque, Bogotá; Niño Barrera, Javier Laureano; Universidad el Bosque, Bogota

    2015-01-01

    RESUMEN. Antecedentes: Los factores asociados a la fractura de un instrumento no se han examinado individualmente, este análisis es posible mediante el método de los elementos finitos Objetivo: Evaluar teóricamente el comportamiento a la flexión de tres diseños de instrumentos utilizados para la preparación biomecánica de los conductos radiculares mediante un análisis de elementos finitos. Métodos: Por medio de Ingeniería inversa se generaron los planos de las limas ProTaper Universal F2®, Mt...

  6. 翼缘加强的单轴对称蜂窝梁性能研究%Performance of Monosymmetrical Castellated Beams with Strengthened Flanges

    Institute of Scientific and Technical Information of China (English)

    张磊

    2016-01-01

    To explore the mechanical properties of the monosymmetrical castellated beams,the finite element analysis was used.The nonlinear factors considered in finite element model and the existing experimental data were compared and ana-lyzed,the results showed that the finite element model possessed sufficient accuracy.This paper established 125 models to study the impact on the mechanical properties of castellated beams.The results firstly showed that the stable bearing capaci-ty of cellular beams with strengthened compression flanges had improved greatly;secondly,although the strength had less improvement,its distribution of internal force was more reasonable;thirdly,the redistribution was made for material by monosymmetrical castellated beams and better mechanical properties was achieved.Therefore,monosymmetrical castellated beams with strengthened compression flanges were recommended in the project.%为了探究单轴对称截面对圆孔蜂窝梁力学性能的影响,采用了有限元分析法,在有限元模型中考虑了非线性的因素,且对该有限元模型和已有的试验资料进行对比分析,该有限元模型具有足够的精确性。建立了125个模型,用以研究截面类型对蜂窝梁力学性能的影响。研究结果表明:(1)受压翼缘加强的蜂窝梁的稳定承载力有较大提高;(2)其强度虽然没有较大幅度的改善,但是内力分布却更加的合理;(3)单轴对称蜂窝梁对材料进行了重分布,其力学性能良好。建议在工程中应用受压翼缘加强的单轴对称蜂窝梁。

  7. 辅助工装的设计与万向轴法兰叉头端面齿的加工方法%The Design of Assistant Equipment and Manufacturing Method of the Cardan Shaft Flange Fork Gearing

    Institute of Scientific and Technical Information of China (English)

    刘体龙; 李秋生; 李蒙

    2016-01-01

    According to the characters of the cardan shaft flange fork gearing, an assistant equipment was designed which could be used to manufacture the flange fork gearing in a six-gear method without changing the structure of X6142A universal lifting platform milling machine ( or the X5042A vertical lifting milling machine) .%针对万向轴法兰叉头端面齿形结构的特点,设计了一种辅助工装,利用该工装,在不改变X6142A万能升降台(或X5042A立式升降台)铣床本身结构的基础上即可对法兰叉头端面齿同时进行六齿加工。

  8. 宏程序在法兰数控编程中的应用%Macros Application on the Flange CNC Programming

    Institute of Scientific and Technical Information of China (English)

    吴冠英; 辛舟

    2012-01-01

    在编写数控加工程序过程中,对于结构或工艺相似的零件,可以采用合适的方法提高编程效率,降低工作强度.以法兰的数控编程为例,在编程中合理利用宏程序,设置变量与参数,加工时自动给变量赋值,使得在数控加工时方便、快捷.%In the writing process of CNC programming, appropriate methods can be used to enhance work efficiency and reduce the intensity of programming for the parts with similar structure or process.By taking flange CNC programming for example, in programming to reasonably use macros program, variables and parameters were set. During the processing, values to variables are assigned automatically, which made the NC machining convenient and quick.

  9. Dimensioning of flanged heat exchangers using the CYRANO software: pure refrigerants and mixtures; Dimensionnement des batteries a ailettes a l`aide du logiciel CYRANO: frigorigenes purs et melanges

    Energy Technology Data Exchange (ETDEWEB)

    Bensafi, A.; Borg, S. [CETIAT, Centre Technique des Industries Aerauliques et Thermiques, 69 - Villeurbanne (France)

    1997-12-31

    A software for the dimensioning and simulation of flanged heat exchangers is presented. This software divides the exchanger into pipe sections in which local values of physical properties of fluids and thermal exchange coefficients are used, and for which individual thermal-hydraulic performances are determined. CYRANO can be used for condensers, evaporators and monophase exchanges, with refrigerants like water, R22, R134a and R32/R125/R134a mixtures. The software can be used also in the case of specified complex circuits, equipped with smooth or grooved pipes and with smooth continuous, corrugated or slatted flanges with non-homogeneous air temperature and velocity distributions. The validation of CYRANO was performed on 7 exchangers with and without humidity condensation on the flanges. Comparisons with test results show that the average of errors in exchanged powers is of about 5%, and of about 30% in the case of internal pressure drops. Some simulations of exchangers with HFC mixtures are also presented. (J.S.) 34 refs.

  10. Application of Numerical Simulation on Wind Turbine Tower Flange Welding%数值模拟技术在风力机法兰塔筒焊接中的应用

    Institute of Scientific and Technical Information of China (English)

    高填; 祁文军; 孙文磊

    2012-01-01

    Based on the thermodynamic and kinetic theory, welding molten pool mathematical model is set, which belongs to a wind turbine tower flange. The coupled thermal stress and the thermal structure coupling are analyzed used AN SYS. Through analyzing the causes of welding angular deformation, and according to the welding technical requirements of wind turbine tower and flanges, the weld predeformation method technology is used to improve wind turbine tower flanges and welding.%基于数值模拟技术,运用热力学和动力学理论建立了风力机法兰塔筒焊接件熔池的数学模型;并运用ANSYS进行了热-应力耦合和热-结构耦合分析.通过分析法兰焊接时发生角变形的原因,根据风力机法兰和塔筒的焊接技术要求,在法兰塔筒连接制造过程中,采用预留焊接反变形量的方法改进风力机法兰和塔筒的焊接工艺.

  11. Investigación experimental sobre los modelos normativos de fisuración en piezas de hormigón armado sometidas a flexión pura

    Directory of Open Access Journals (Sweden)

    Calderón, E.

    2010-06-01

    Full Text Available The present study analyzes the suitability of the formulas proposed in EHE, Eurocode 2 and ACI Building Code 318 for crack control in reinforced concrete by testing 14 full-scale beams subjected to pure bending. It also explores the effect of varying parameters such as diameter, steel ratio and compression reinforcement arrangement and analyzes the fit between the above theoretical procedures and the experimental findings (less favourable than expected in some cases. The article also discusses the considerable impact of certain parameters, such as steel ratio, on crack control, and the scant effect of parameters such as diameter, reinforcement spacing and the arrangement of compression reinforcement. Pursuant to the results obtained in this study, possible variations on existing formulas are evaluated, specifically on the formula exhibiting a tendency that came closest to reflecting the test results (EC-2, with a view to improving the fit between that formula and the experimental results.

    La presente investigación analiza la idoneidad de las formulaciones propuestas por EHE, Eurocódigo 2 y ACI 318 Building Code para el control de la fisuración en elementos de hormigón armado mediante el ensayo de elementos a escala real, 14 vigas a flexión pura. Además analiza la influencia de la variación de parámetros tales como el diámetro, cuantía y disposición de armadura comprimida. En esta investigación se analiza el ajuste de las formulaciones teóricas antes referidas y los resultados experimentales obtenidos, con resultados en algunos casos más desfavorables que los previstos. También pone de manifiesto la notable influencia de algunos parámetros, tales como la cuantía en el control de la fisuración, y por el contrario, la poca influencia de parámetros tales como el diámetro, la separación de armaduras, y la disposición de armadura comprimida. De acuerdo con los resultados obtenidos en la investigación, finalmente se eval

  12. La Poste

    CERN Multimedia

    2004-01-01

    http://www.cern.ch/cern50/ The French Post Office has issued ten commemorative envelopes bearing original images depicting CERN and its history. This special fiftieth anniversary collector's edition will be available on the French Post Office (« La Poste ») stand at the Open Day on 16 October, in the CMS experiment hall at Cessy. Information for collectors: a pictorial postmark and date stamp have been specially designed and produced for the occasion with the assistance of CERN's graphics team. Sending a philatelic souvenir is a great way to commemorate the Open Day, so La Poste will be setting up a large post-box for that very purpose next to its stand. A perfect way to send images of CERN all around the world...

  13. 非对称法兰密封固定盖级进模设计%Design of progressive die for sealing fixing cover with asymmetric flange

    Institute of Scientific and Technical Information of China (English)

    丁明明; 蔡丹云; 黄勇

    2013-01-01

    Aiming at the characteristics of the thin thickness and high precision for sealing fixing cover with asymmetric flange,the stamping process of the product was analyzed.The progressive die with thirteen positions was designed.The working process of the die was illustrated in detail.The matters needing attention in stamping production were pointed out.The specific technical measures adopted can avoid the crack and unqualified size of products.The two years production practice shows that the stamping process design is reasonable,the reliable structure of die is convenient to be repaired and can guarantee the quality of products which should fully meet customer requirements.%针对非对称法兰密封固定盖冲压件材料薄和精度要求高的特点,分析了产品的冲压工艺性,设计了13工位的级进模,说明了模具的具体工作过程,指出冲压实际生产中要重点注意的事项,以及产品容易出现的裂纹和成形尺寸不合格等质量问题,以及需采取的具体工艺措施.级进模具投入生产两年以来的实践表明:冲压工艺设计合理,所设计的模具结构可靠,模具维修方便,能保证产品质量,生产的冲压零件完全满足客户要求.

  14. Effects of γ irradiation on the compression and inter-laminar shear properties of G10 for the BESIII beam pipe supporting flange

    Energy Technology Data Exchange (ETDEWEB)

    Zheng, Lifang, E-mail: zhenglifang@ustb.edu.cn [University of Science & Technology of Beijing, Beijing, 100083 (China); Qiao, Zhiming [University of Science & Technology of Beijing, Beijing, 100083 (China); Shijiazhuang Mechanical Engineering College, Shijiazhuang, 050003 (China); Xu, Xiaohui; Wang, Li [University of Science & Technology of Beijing, Beijing, 100083 (China)

    2017-04-15

    Highlights: • After γ irradiation, the epoxy resin matrix in G10 is destroyed; the connection between it and glass fibers loosens. • The compression strength drops. • The fragmentation and expansion of the resin matrix enhance the mutual sliding friction in G10. • The ILSS increases. - Abstract: Given their excellent electrical insulating performance and mechanical properties, G10 epoxy glass cloth-laminated sheets (G10) are used as spare materials for the supporting flange of the Beijing Spectrometer III beam pipe in the Beijing Electron Positron Collider II (BECPII). However, during BECPII operation, the beam pipe suffers a significant amount of γ and neutron irradiation. Studies have demonstrated that when the G10 is exposed to γ irradiation for a sufficiently long time, the material will become damaged, and its mechanical properties will change. In the present work, the compression strength and inter-laminar shear strength (ILSS) of G10 samples were tested. Results showed that after 20 and 200 kGy γ irradiation, the compression strength decreased by 1.26% and 2.15%, respectively, whereas the ILSS increased by 16.17% and 17.95%, respectively. The micro-structural pattern of the samples was investigated by scanning electron microscopy. The firm mesh structure of the epoxy resin matrix was destroyed, and the bonding interface between the glass fibers and the epoxy resin was damaged after γ irradiation. Some microcracks were observed in the glass fibers after γ irradiation. The epoxy resin before and after the irradiation was analyzed by infrared spectroscopy. Results showed that the degradation reaction was dominant during the irradiation compared with the cross-linking reaction in the epoxy resin, leading to the fracture of the molecular chain. The degree of binding between the epoxy resin also decreased.

  15. Factores geométricos para calcular a flexión engranajes cilíndricos rectos asimétricos con perfil evolvente - trocoide // Geometric factors for determining the bending strength of asymmetric spur gears with profile teeth involute-trochoid

    Directory of Open Access Journals (Sweden)

    Javier Antonio Cárdenas-Oliveros

    2011-08-01

    Full Text Available ResumenSe propone un modo de cálculo analítico basado en el análisis del modelo gráfico del diente de losengranajes cilíndricos rectos asimétricos con perfil de evolvente y trocoide, que permite obtener lasvariables asociadas a la determinación de los factores geométricos de forma y de resistencia,necesarios para el cálculo de la resistencia a flexión. Este tipo de procedimiento es empleado porprimera vez para obtener el parámetro geométrico de forma. Además, se establecen losfundamentos que aportan la determinación del parámetro geométrico de resistencia J para estostipos de engranajes. Los resultados de la presente investigación permiten determinar el esfuerzomáximo a la flexión a partir de los coeficientes geométricos de forma y resistencia, se construyeronecuaciones, tablas y diagramas representativos de estos parámetros. La aplicación práctica de esteenfoque de solución, permite la generalización del mismo en los mecanismos de transmisión conengranajes cilíndricos de dientes rectos asimétricos de perfil evolvente trocoide..Palabras claves: engranaje recto asimétrico, factores geométricos, resistencia a la flexión, CAD/CAE.__________________________________________________________________________AbstractIn this paper an analytical method of calculus based on computer analysis of the spur gears graphicmodel with asymmetric teeth of involute profile and trochoid is proposed, it was estimated formgeometry factor and bending strength by a direct calculus method. This procedure is first used toobtain form geometry factor. Furthermore, the factor J foundation for these types of gears wasestablished. The results of this research determinates analytically the maximum bending stress, usingthe form geometry factor and bending geometry factor, built equations, tables and diagramsrepresenting these parameters. The practical application of this solution approach allows thegeneralization of it in use in transmission

  16. Problems and recommendations for setting up bridge on flanges of metal pipes in fossil-fueled power plants%火力发电建设项目金属管道法兰跨接问题探讨

    Institute of Scientific and Technical Information of China (English)

    田玉玺

    2014-01-01

    Fossil-fueled power plants exist hazardous chemicals such as hydrogen,ammonia and diesel,where lightning and static electricity can result in fire and explosion. Unsafe hidden troubles appeared when unsuitable setting up bridge on flanges of metal pipes. In this paper,combined with practical application of fossil-fueled power plants,the risk for lightning and static electricity,as well as the risk for flanges of metal pipes are analyzed. light-ing and static electricity current can be released by metal pipes,risk will be reduced by decreasing pipeline system resistance. setting up bridge on flanges of metal pipes is an effective measure for anti-lightning and anti-electrostat-ics. Setting up bridge on flanges of metal pipes must be strictly performed according to the technical standards.%火力发电建设项目氢气、液氨(氨气)、燃油等系统存在氢、氨、柴油等危险化学品,一旦发生雷击或静电打火,可引发火灾爆炸。针对部分建设项目法兰跨接设置不当,给项目安全运行带来隐患的情况,结合火力发电建设项目实际,对雷电和静电的危害及法兰的存在对雷电和静电危害造成的影响进行了分析,并根据相关标准对建设项目法兰跨接常见问题进行了探讨。金属管道系统是雷电电流泄放及静电释放的通道,减小管道系统电阻可以降低雷击或静电打火风险,金属管道法兰跨接是防雷防静电的有效措施,相关单位应严格按照标准要求对法兰设置跨接,确保管道系统的电流导通性,防止雷电和静电引发火灾爆炸事故。

  17. 浅议泵站水泵进出水段连接法兰的改进%Discussion on Improvement of Connecting Flange at the Water Inlet and Outlet Section of the Pump

    Institute of Scientific and Technical Information of China (English)

    周武

    2014-01-01

    The mine takes chamber solution mining to exploit low grade glauberite rock salt deposit. Pumping station underground has the problem of dislocation of the bolt hole of flange and the water inlet and outlet section of the pump when replacing the water pump. It has to cut the water inlet and outlet pipe with oxygen welding and then connect with the bolt hole of flange and at last wield the pipes. Improve the flange to movable one, and the flange can rotate 360 degrees along the pipes which is convenient for location the bolt hole. The length is scalable, in that case, it is not necessary to cut and wield water pipe for in place of the hole of gate valve and carry out oxygen wielding for replacing water pump. It solves the security hidden danger in the special environment and reduces the work load of the staff which is of reference for the similar mine or pump station.%矿山采用硐室水溶法开采低品位钙芒硝岩盐矿床。井下泵站在更换水泵时存在水泵进出水段与法兰盘的螺栓孔对孔错位,需动用氧焊将进出水管道割断后连接好法兰盘螺栓,再焊接起水管。采用技改措施改进法兰盘为活动法兰,法兰可沿连接管360度旋转,方便对螺栓孔,且可伸缩长度,不必割焊出水管就上方的闸阀孔位,更换水泵不动用氧焊。解决了在特殊环境下作业的安全隐患,减轻了员工劳动负荷,对类似矿山或泵站有借鉴意义。

  18. Simplified calculation of rotational restraint stiffness for flange of cold-formed thin-walled C-shaped steel column%冷弯薄壁C形钢柱翼缘转动约束刚度简化计算

    Institute of Scientific and Technical Information of China (English)

    姚永红; 武振宇

    2013-01-01

    畸变屈曲是冷弯薄壁型钢构件的主要破坏模式之一,按翼缘模型计算其弹性畸变屈曲应力时需要确定腹板对翼缘的转动约束刚度.现有转动约束刚度计算公式较复杂,求解过程需要进行一次迭代.为了简化计算过程,提出了冷弯薄壁C形钢柱翼缘转动约束刚度简化计算方法.该方法在Lau和Hancock公式的基础上,结合我国《冷弯薄壁型钢结构技术规范》(GB50018-2002)中关于腹板和翼缘局部屈曲系数的规定而导出的,并根据Lau和Hancock公式计算结果对其进行了修正.与有限条分析值对比表明:该方法可以准确、方便地计算转动约束刚度,能够应用于冷弯薄壁型钢C形截面柱的设计计算.%The distortional buckling is one of the main failure modes for cold-formed thin-walled steel components. When the elastic distortional buckling stress of steel components is calculated with flange model, it is necessary to determine the rotational restraint stiffness provided by the web plate to the flange. However, the current calculation formula for the rotational restraint stiffness is complicated, and one iteration is required in the solution process. In order to simplify the calculation process, a simplified calculation method concerning the rotational restraint stiffness for the flange of cold-formed thin-walled C-shaped steel column was proposed. Based on Lau and Hancock' s formulas, the proposed method was derived in combination with the regulations concerning the local buckling coefficients of the web plate and flange in the Technical Code of Cold-Formed Thin-Walled Steel Structures (GB 50018-2002) in China, and it was then modified according to the results calculated by Lau and Hancock' s formulas. Compared with the finite strip analytical values, it is noted that the proposed method can calculate the rotational restraint stiffness accurately and conveniently, and can be used for the design and calculation of cold-formed thin

  19. 深水法兰连接机具螺栓预紧方法及装置研究%Research on Method of Bolt Tightening and Bolt Tightening Equipment of the Deep Water Flange Connection Tool

    Institute of Scientific and Technical Information of China (English)

    李伟; 王芳; 田玉江; 王上原; 王亚伟

    2012-01-01

    随着陆地和浅水油气资源的日益枯竭,急须开发深水油气资源以满足国民经济发展对能源的需求.法兰螺栓连接是深水管道连接的常用方法,也是深水管道回接必须攻克的难点.深水法兰连接机具是应用于深水管道法兰连接的一种专用设备,确定深水法兰连接机具的螺栓预紧方法对开发设计深水法兰连接机具具有重要意义,通过对比几种常用的螺栓预紧方法,确定了适用于深水的螺栓预紧方法,并设计了一种深水工作的螺栓预紧装置.该研究成果对机具的进一步开发,促进我国深水作业设备发展和提高我国深水管道连接技术具有一定意义.%Along with the wearing out of petroleum resource, petroleum resource of deep water must be exploited to improve nation economy development. The one of the methods of the deep water pipeline connection is the flange connection, but it is a difficult problem must be conquered. The deep water pipeline flange connection tool is a kind of special equipment to connect the deep water pipeline, to determine the method of the bolt tightening is important for developing the deep water pipeline flange connection tool. Through comparing the some methods of the bolt tightening, a method of the deep water bolt tightening is determined, and a set of the bolt tightening equipment is designed. The method and the equipment could promote the development of the deep sea technology and improve deep sea pipe flange connecting technology.

  20. Monitoring post

    DEFF Research Database (Denmark)

    Hansen, Pelle Guldborg; Jespersen, Andreas Maaløe

    2013-01-01

    This blog reports on the rumour that White House considers establishing a nudge unit similar to the UK Behavioural Insights Team. Given The Nudging Networks purpose and the work of the iNudgeYou-team this post is updated continuously to follow the US debate as it unfolds. Which issues are raised......? How is the debate different from the one in the UK? And how does our work relate to the issues raised? The post has already been referenced in several US media, including US News....

  1. AP10001#机组反应堆压力容器腔室的顶法兰预制技术研究%Fabrication Technology Research of 1# Top Flange of Reactor Vessel Cavity in Sanmen AP1000 Nuclear Power Plant Phase 1

    Institute of Scientific and Technical Information of China (English)

    谭远红; 郑文炳

    2015-01-01

    The paper is based on the engineering experience of Reactor Vessel cavity top flange fabrication mockup test. A practical and mature top flange fabrication method is generated with the simplified design of top flange and better welding plan of components. At the same time, the surveyed data from 1# top flange fabrication process of Reactor Vessel cavity in Sanmen AP1000 Nuclear Power Plant is used to prove this mature method of top flange fabrication.%基于反应堆压力容器腔室的顶部法兰预制模拟件的工程经验,通过简化顶法兰设计,优化零部件的焊接方案,形成了一套切实可行的、成熟的顶法兰预制方法,并且结合三门核电一期AP10001#机组反应堆压力容器腔室的顶法兰预制过程中的实际测量数据,进一步验证了这套成熟的顶法兰预制方法。

  2. Ductility Enhancement of Post-Northridge Connections by Multilongitudinal Voids in the Beam Web

    Directory of Open Access Journals (Sweden)

    Sepanta Naimi

    2013-01-01

    Full Text Available Since the earthquakes in Northridge and Kobe in 1994 and 1995, respectively, many investigations have been carried out towards improving the strength and ductility of steel beam to column pre- and post-Northridge connections. In order to achieve these objectives, recent researches are mainly focused on three principles: reducing the beam section to improve the beam ductility, adding different kinds of slit damper to beam and column flanges to absorb and dissipate the input earthquake energy in the connection and strengthening the connection area using additional elements such as rib plates, cover plates, and flange plates to keep the plastic hinges away from the column face. This paper presents a reduced beam section approach via the introduction of multilongitudinal voids (MLV in the beam web for various beam depths varying from 450 mm to 912 mm. ANSYS finite element program was used to simulate the three different sizes of SAC sections: SAC3, SAC5, and SAC7. Results showed an improvement in the connection ductility since the input energy was dissipated uniformly along the beam length and the total rotation of the connection was over four percent radian.

  3. Manufacturing of High Ductility Aluminum Bronze Porcelain Sleeve Flange by Centrifugal Casting%高塑性铝铁青铜瓷套法兰离心铸造工艺

    Institute of Scientific and Technical Information of China (English)

    王清宇

    2012-01-01

    介绍了铝铁青铜材料的特性以及瓷套法兰铸件的使用状况和力学性能要求.在生产过程中应用了离心铸造工艺,通过分析生产中易产生的缺陷及防止措施的实施,制定了合理的高塑性铝铁青铜铸件离心铸造生产工艺,并通过生产过程的控制,达到了生产优质合格瓷套法兰零件的目的.%The characteristics of aluminum bronze material, using conditions and requirement for mechanical properties of porcelain sleeve flange were expounded. The porcelain sleeve flamge was produced by centrifugal casting. Through analyzing defects and implementing measures for eliminating defects, the proper centrifugal casting process was presented. By controlling strictly production process, the qualified porcelain sleeve flange was produced successfully.

  4. Porous Flanging Process Analysis and Dies Design on the Moderate Thickness Plate%中厚板多孔翻边工艺分析及模具设计

    Institute of Scientific and Technical Information of China (English)

    陈卫; 王勤家

    2012-01-01

    以某出口车型外观件封板为例,结合现场生产环境,改进工艺方法,设计了中厚板大尺寸多内孔整体翻边模,实现封板的整体内孔翻边,提高工件局部强度,解决了焊接带来的变形及平面度超差问题,提高生产效率,满足了制件的批量生产需求。%Set the shrouding of the appearance plate on one of the exported wagons as an example, incorporated with the onsite production environment, with improved processing methods to design the jumbo size of entire flanging dies with inner porous for the moderate thickness plate, aims to achieve the entire inner porous flanging of the shrouding. As a result, the local strength of the working pieces has been enhanced and solved the deformation and over proof of the flatness by welding, then the production rate is raised, meet the mass production requirements.

  5. 带金属脱料器的螺纹内孔翻边模具设计%Design of flanging die which is use in threaded hole of metallic ejector

    Institute of Scientific and Technical Information of China (English)

    顾朝上

    2014-01-01

    在金融自助设备、地铁设备和电信家电等产品的薄板零件中,螺纹底孔翻边,是较为常见的加工工序,翻边后,增加了螺纹旋合长度,提高螺纹联接强度,减轻材料重量,降低材料费用。本文着重讨论螺纹底孔翻边冲压成形工艺、计算方法以及带金属脱料器的螺纹内孔翻边模具设计。%The technology of underport flanging is common technical in manufacturing activity.It has been widespread use of component which is used for financial self-service equipments, metro equipments, telecommunication equipment , household electrical appliances etc . Using this technology will increase the length of thread engagement , improve the con-nection strength and reducing the weight of material .So this technology is beneficial to reducing material costs .This paper is mainly discussed about the stamping forming process、computing method and the design of flanging die which is use in threaded hole of metallic ejector.

  6. Three-Dimensional Numerical Analysis for the Pipe Flanged Jiont with Belleville Spring in Delayed Coking Unit%延迟焦化装置中带碟簧的管法兰接头三维数值分析

    Institute of Scientific and Technical Information of China (English)

    董智; 仇性启; 赵宗彬

    2011-01-01

    FEA was used to analyze the force and deformation of coke tower and the pipe in delayed coking unit. Three - dimensional numerical analysis for the pipe flanged joint with belleville spring was carried on to investigate belleville spring's effects on gasket stress under the elevated temperature condition of coking stage. The results of the simulation show that coke tower produces thermal expansion, so induces the bend deformation of pipeline in the coking stage. High temperature's effects on them are more obvious than the pressure's. Proper use of belleville spring is more favourable for maintaining the working stress of gasket of the pipe flanged joint under the condition of elevated temperature.%应用有限元法分析延迟焦化装置中焦炭塔和管道的受力和变形,并针对生焦高温工况,对带有碟形弹簧的管法兰接头进行三维数值模拟,分析碟形弹簧对垫片应力的影响.模拟结果表明,生焦时焦炭塔受高温膨胀,导致管道弯曲变形,而内压对此影响相对要小很多;高温下选用适当的碟形弹簧,有利于维持管法兰接头的垫片工作应力.

  7. SUSPICIOUS POST

    CERN Multimedia

    Relations with the Host States Service

    2001-01-01

    If you receive a suspicious letter or package in the post, please do not open it and contact the Fire Brigade Tel. 74444. They will contact the CERN Medical Service. This is especially important in today's current situation with regard to the Anthrax scare. For further information, the Permanent Mission of Switzerland to the International Organisations in Geneva recommends the following web sites:   http://www.admin.ch/ch/f/cf/brennpunkt/03.html http://www.who.int/emc-documents/zoonoses/whoemczdi986c.html

  8. Design of flanging riveting die for automobile CP-typed clutch cover assembly%CP型汽车离合器盖总成翻卷边铆接模设计

    Institute of Scientific and Technical Information of China (English)

    严正峰; 李盖华

    2014-01-01

    针对CP型汽车离合器盖总成及工艺特点,设计一副专用于CP型离合器盖总成翻卷边铆接的复合模,并对模具结构、工作过程、设计要点、潜在失效问题和原因以及解决措施等进行了论述和分析。模具结构也可应用到类似钣金零件的连接中。%A special compound die for the flanging riveting of an automobile CP-typed clutch cover assembly was designed based on the component’s process characteristics. The die structure, working process, design points were presented and the potential failure prob-lem and cause were analyzed and then the solutions were proposed.

  9. Measurement component technology. Volume 1: Cryogenic pressure measurement technology, high pressure flange seals, hydrogen embrittlement of pressure transducer material, close coupled versus remote transducer installation and temperature compensation of pressure transducers

    Science.gov (United States)

    Hayakawa, K. K.; Udell, D. R.; Iwata, M. M.; Lytle, C. F.; Chrisco, R. M.; Greenough, C. S.; Walling, J. A.

    1972-01-01

    The results are presented of an investigation into the availability and performance capability of measurement components in the area of cryogenic temperature, pressure, flow and liquid detection components and high temperature strain gages. In addition, technical subjects allied to the components were researched and discussed. These selected areas of investigation were: (1) high pressure flange seals, (2) hydrogen embrittlement of pressure transducer diaphragms, (3) The effects of close-coupled versus remote transducer installation on pressure measurement, (4) temperature transducer configuration effects on measurements, and (5) techniques in temperature compensation of strain gage pressure transducers. The purpose of the program was to investigate the latest design and application techniques in measurement component technology and to document this information along with recommendations for upgrading measurement component designs for future S-2 derivative applications. Recommendations are provided for upgrading existing state-of-the-art in component design, where required, to satisfy performance requirements of S-2 derivative vehicles.

  10. 新型冷弯翼缘闭合构件力学性能研究%Mechanical properties of two kinds of new cold-formed flange-closed welded section members

    Institute of Scientific and Technical Information of China (English)

    武胜; 张厚; 王伟

    2011-01-01

    The hollow flange beam (HFB) is a particular cross section with two torsion rigid closed triangular flanges and a comparatively flexible web, and it is a type of high efficient cross section. This paper presents two kinds of new cold-formed flange-closed welded sections named HF1 and HF2 through change the section component and parameters of HFB. Based on the 15recise finite element model, nonlinear finite element method is adopted to study the static behaviors including buckling modes, deformed process, load carrying ca- pacity and stiffness of two new kinds of section members under axial compression, bend and component axial compression-bend loads. The two new kinds of section members have some superior static behaviors including higher mean section stress and modulus of the member and have no local buckling phenomena in the elements are proofed under axial compression, and have the well characteristic of high rigidity, high uhimate capacity, local buckling of the sections always hard to occur and correlation curves replete under bend and component axial compression-bend loads, too. The new cold-formed flange-closed welded section members can go deep into the experiment study as to be used in the practical engineering.%为进一步利用空翼缘梁截面形式开展,抗弯、扭刚度大的特点,并进一步优化冷弯薄壁型钢构件的截面形式,适当改变空翼缘梁的截面构成参数,提出2种新型冷弯翼缘闭合截面.采用非线性有限元方法分析新型截面构件在轴压、弯矩和压弯荷载作用下的屈曲模式、变形特征、承载力、刚度等方面力学性能.分析表明:新型冷弯截面构件在承受轴压荷载时具有截面平均应力高、构件刚度大、弯曲变形小,板件不易局部屈曲等性能优势;在承受弯矩和压弯荷载时具有刚度大、抗弯承载力高、截面局部屈曲不易发生、相关曲线饱满等优越的力学性能

  11. Standard Specification for Pressure Consolidated Powder Metallurgy Iron-Nickel-Chromium-Molybdenum (UNS N08367), Nickel-Chromium-Molybdenum-Columbium (Nb) (UNS N06625), Nickel-Chromium-Iron Alloys (UNS N06600 and N06690), and Nickel-Chromium-Iron-Columbium-Molybdenum (UNS N07718) Alloy Pipe Flanges, Fittings, Valves, and Parts

    CERN Document Server

    American Society for Testing and Materials. Philadelphia

    2015-01-01

    Standard Specification for Pressure Consolidated Powder Metallurgy Iron-Nickel-Chromium-Molybdenum (UNS N08367), Nickel-Chromium-Molybdenum-Columbium (Nb) (UNS N06625), Nickel-Chromium-Iron Alloys (UNS N06600 and N06690), and Nickel-Chromium-Iron-Columbium-Molybdenum (UNS N07718) Alloy Pipe Flanges, Fittings, Valves, and Parts

  12. Numerical Simulation of Seismic Behavior of Beam-Column Connection for Self-centering Steel Frame with Bottom Flange Friction Devices%下翼缘摩擦式自定心钢框架梁柱节点抗震性能的数值模拟

    Institute of Scientific and Technical Information of China (English)

    宋良龙; 郭彤

    2011-01-01

    介绍了一种新型的钢框架梁柱节点形式,其中预应力钢绞线提供了结构在地震作用下的复位功能(自定心),设置在梁端下翼缘的摩擦件则为结构提供了耗能能力;介绍了下翼缘摩擦式自定心钢框架梁柱节点的构造和工作原理,以节点的低周反复加载试验结果为依据,利用面向对象的开放式计算程序OpenSees建立了节点的数值模型,并侧重于模拟节点在地震作用下的张开/闭合、自定心、摩擦耗能以及螺栓受剪等特性.由计算结果与试验结果对比可知,所建立的数值模型对节点的抗震性能具有良好的模拟效果.%This paper presents a novel beam-column connection for steel moment resisting frames, in which the post-tensioning forces provide the ability of self-centering under earthquake, and the bottom flange friction device (BFFD) , located at beam ends, provides the energy dissipation. The operation principle and constitution of the BFFD connection are presented. Based on the low cyclic test results of the BFFD connection , a numerical model is established by using the Open System for Earthquake Engineering Simulation (OpenSees) to model the hysteretic behavior of the BFFD connection, including the gap opening/closing, self-centering, friction energy dissipation and the bolt bearing, etc. Comparison between the numerical simulation and the experiment results shows that the proposed numerical model can accurately simulate the hysteretic behavior of the BFFD connection.

  13. Research of Asymmetrical Cold Rolling and Recrystallization Annealing Experiment of Flange Plate Steel%翼缘板钢非对称冷轧及再结晶退火实验研究

    Institute of Scientific and Technical Information of China (English)

    唐荻; 戴辉; 孙蓟泉

    2011-01-01

    对翼缘板钢采用非对称冷轧,在压下率78%时,对轧件进行微观显微组织观察,结果表明:随着异速比增大,晶粒长度和宽度比值也增大;提出了在异步轧制条件下,晶粒长宽比值可以反映轧件所受附加剪切变形的大小.对冷轧后的轧件进行拉伸实验与不同温度的退火实验,并进行透射电镜观察,结果表明:随着异速比增加,规定非比例延伸强度增加,退火后晶粒平均直径变小;同时,观察到了较高位错密度的位错和较小尺寸的亚晶;由此验证了异步轧制可比同步轧制产生更多的附加剪切变形以及更多的位错和亚晶,可以提高翼缘板钢的强度,增加应变储能,降低再结晶退火温度.%Asymmetrical cold rolling technology was adopted for flange plate steel. Microstructure of rolled pieces was observed under the accumulated reduction of 78%. The results show that as the ratio of working rollers' speed is greater, the ratio of length to width of gain is higher. The idea is put forward that the ratio of length to width of gain can reflect the additional shear deformation size of rolled pieces under the condition of asymmetrical rolling. The tensile tests and annealing tests at different annealing temperatures were made for cold rolled pieces and the microstructure was observed by the transmission electron microscopy. The results show that as the ratio of working rollers' speed is greater, proof strength increases, average grain diameter decreases after cold rolled pieces annealed. With increase of the ratio of working rollers' speed, high density dislocations and the small size subgrains are observed. It indicates that asymmetrical rolling can present more additional shear strain than that of symmetrical rolling, more dislocations and subgrains can be generated in the course of asymmetrical rolling, and the strength of the flange plate steel is enhanced and the straining accumulation energy increases under the condition of

  14. Local Compression of Concrete Columns Under Foot Flange of Steel Tube Tower%钢管塔法兰底板下的混凝土立柱局部受压

    Institute of Scientific and Technical Information of China (English)

    左元龙; 贤鹏; 董建尧

    2013-01-01

    According to《Technical Regulation of design for tower and pole structure of overhead transmission line》(DL/T5154-2002),the strength analysis of the square tower foot plate under compression should be calculated with the uniform reaction force(Putting aside the correctness of this view), in no longer checking the concrete local compression under the tower bottom plate;steel tube tower foot flange plate is an annular area of the base plate and the thickness of the plate is often less than the square tower foot plate, which concrete local compression of the calculation were not listed in the present Code and Technical regulations;for"1000kV Huainan-Shanghai (Anhui Power East) transmission line ", the project was made up of double-loop steel tube tower, the foot flange bolts using a small diameter of specifications and more number, with the calculation method proposed in this paper, which can meet the local compression of the concrete column under the tower feet.%现行《架空送电线路杆塔结构设计技术规定》(DL/T5154-2002),对方型塔脚底板受压时按照均布反力验算底板的强度(暂且不论此观点的正确性),在均布反力的作用下,不再验算塔脚板下混凝土立柱的局部受压;而钢管塔的地脚法兰板为圆环状,底板的面积和板的厚度往往小于方型塔脚底板,其混凝土局部受压的计算在现行的规范和规定中均未列出;“1000kV淮南-上海(皖电东送)输电线路工程”全线为双回路钢管塔,在地脚法兰的螺栓采用小规格多数量,用本文提出的计算方法,可满足塔脚法兰底板下混凝土立柱的局部受压。

  15. Application of Welding box girder flange by Using RAPID Welding Technology%RAPID焊接工艺技术在箱型梁翼缘板焊接的应用

    Institute of Scientific and Technical Information of China (English)

    程国志; 于连康

    2016-01-01

    RA PID焊接技术是目前比较先进的一项焊接工艺技术,它是利用数字控制的电弧曲线参数,进一步压缩电弧,使得电弧热量更集中、更具备熔透能力的一种高速焊接技术。由于其高速、高熔深的焊接工艺特性,被用于单面焊接双面成型的钢结构焊接上,可显著提高焊接生产效率。在铝电解多功能机组生产制造的专业厂,其天车主梁的焊接工艺技术一直是采取MAG焊接工艺技术,焊接质量及效率低。应用RAPID焊接工艺技术对箱型梁翼缘板焊接,与M AG焊接工艺技术在焊接质量、效率、经济性等方面进行对比、分析总结,可知,RAPID焊接工艺技术应用在天车主梁翼缘板的焊接中,综合经济效益较MAG焊接工艺有着显著的提高。%RAPID welding technology is an advanced high speed welding technology , the arc curve parame‐ters of w hich is controlled by digital technology , further compressed arc made the arc heat more concen‐trated , and had more penetration ability . Because of its welding technology properties of high speed and high penetration ,it is used for steel structure which is single -sided welding but double -sided molding , significantly improved the efficiency of welding production .In most aluminum electrolysis multifunctional unit manufacturing plants , the crane girder welding technology has been adopt MAG welding technology , welding quality and efficiency is low . After comparing , analyzing and summarizing the welding technology between RAPID and MAG about welding box beam wing flange , found that the RAPID welding technolo‐gy is better than MAG in welding quality , efficiency , economy and so on . RAPID welding technology used in crane girder flange plate welding , the comprehensive economic benefits is significantly improved than that of MAG welding technology .

  16. 气化炉轴套管法兰螺纹孔的补焊%Repair Welding Procedure for Flange Screwed Holes of Pipe Spreaders of Fluidized Gas Producer

    Institute of Scientific and Technical Information of China (English)

    张亚奇; 徐兵; 马鸣

    2014-01-01

    In order to repair the flange screwed holes of pipe spreader of fluidized gas producer,proper welding procedure and operation method were confirmed,and there were not any slag or lack of fusion in those repaired seams.After ISR with welding stress released,because of a number of screwed holes and welding stress,the inner diameter of pipe spreaders become smaller 0.5 ~0.6 mm than before,but the di-mension of redrilling screwed holes is agreement to design drawing.%为了修补气化炉轴套管法兰的螺纹孔,制定了合理的焊接工艺,采用了特殊的操作手法,补焊焊缝经探伤无夹渣、未熔合,并经中间热处理,释放焊接应力后再重新钻孔。由于补焊的螺纹孔数量较多、焊接应力较大,补焊后轴套管内径缩小0.5~0.6 mm,经检测螺纹孔尺寸仍能满足图样要求。

  17. Research and Development on CNC System of the Saddle Surface of Flange Connection Processing Plant%法兰接管马鞍曲面加工专机CNC系统研发

    Institute of Scientific and Technical Information of China (English)

    吴明亮; 杨东方

    2013-01-01

    The detail design scheme of CNC system based on MSC-51 SCM was put forward for the saddle surface of flange connection processing plant. The manufacturing plan, the hardware circuit and software flowchart were discussed. C language and assemble language were used to program in uVision2. Hardware circuit was designed in Protues7. The simulation results show that the proposed design scheme of the CNC system is feasible.%针对法兰接管马鞍曲面加工专机,提出一种基于51系列单片机的CNC系统设计方案.详细阐述了加工方案,并给出硬件电路的构成方案和软件的程序流程图.利用C语言和汇编语言在uVision2下进行混合编程,并在Protues7中完成硬件电路设计,进行了联合仿真验证.结果表明:自主开发的数控系统能够满足法兰接管的加工要求.

  18. Analysis of effective flange width of small radius curved bridge with single box and double chamber%小半径单箱双室曲线桥梁翼缘有效宽度的研究

    Institute of Scientific and Technical Information of China (English)

    方飞; 张杰; 张鲲; 张振; 方诗圣

    2013-01-01

    针对小半径单箱双室曲线梁桥的剪力滞效应以及选取其翼缘有效宽度的问题,文章依托实际工程,采用有限元软件ABAQUS建立某曲线梁桥的空间有限元模型,分析了荷载为重力、汽车荷载等共同作用下结构的变形和内力,研究不同曲率半径下,剪力滞效应及其对小半径曲线梁桥翼缘有效宽度取值的影响。结果表明:对于单箱双室箱形截面,不同半径作用下,中腹板对应的有效宽度都小于两侧宽度;相比直线桥而言,对于不同的曲率半径,内腹板对应的有效宽度大于外侧腹板;随着曲率半径的减小,各个腹板对应的有效宽度的差值也越来越大。故在确定小半径单箱双室曲线梁桥翼缘有效宽度时,可以在现行桥梁设计规范的计算宽度基础上乘以修正系数。%The shear lag effect of small radius curved bridge with single box and double chamber and the selection of the effective width of flange were studied .Based on the practical engineering ,the de-formation and the inner force of the structure under the interaction of load gravity and vehicle load were analyzed by the spatial finite element model of a curved girder bridge using the finite element software ABAQUS .The shear lag effect of small radius curved bridge with single box and double chamber under different radius of curvature and the influence on the flange’s value were studied .The results show that under the influence of different radius ,the corresponding effective width of medium web is less than bilateral web width for the section of single box and double chamber single box ;com-pared with the straight bridge ,the corresponding effective width of medial web is larger than lateral web’s under different radius of curvature ;the differences of the corresponding effective width of each web become larger and larger with the decrease of radius of curvature .In a conclusion ,the calculative width of current

  19. Post-Concussion Syndrome

    Science.gov (United States)

    Post-concussion syndrome Overview By Mayo Clinic Staff Post-concussion syndrome is a complex disorder in which various symptoms — ... sometimes months after the injury that caused the concussion. Concussion is a mild traumatic brain injury that ...

  20. Post cardiac injury syndrome

    DEFF Research Database (Denmark)

    Nielsen, S L; Nielsen, F E

    1991-01-01

    The post-pericardiotomy syndrome is a symptom complex which is similar in many respects to the post-myocardial infarction syndrome and these are summarized under the diagnosis of the Post Cardiac Injury Syndrome (PCIS). This condition, which is observed most frequently after open heart surgery, i...... on the coronary vessels, with cardiac tamponade and chronic pericardial exudate. In the lighter cases, PCIS may be treated with NSAID and, in the more severe cases, with systemic glucocorticoid which has a prompt effect....

  1. Using ensembles of simulations to find high-fidelity post-shot models of inertial confinement implosions at the National Ignition Facility

    Science.gov (United States)

    Nora, Ryan; Field, John E.; Spears, Brian; Thomas, Cliff A.

    2016-10-01

    The inertial confinement fusion program at the National Ignition Facility is performing subscale experiments for a variety of implosion designs. Successful designs, those with experiments that are similar to postshot simulation, will be fielded at larger scale. This work supports the program's effort by establishing high fidelity post-shot simulations matching all experimental observables: scalar data, such as the neutron yield and areal densities; vector data, such as flange nuclear activation diagnostics; and image data, such as time-dependent x-ray self-emission images. We will present a metric for measuring the nearness of postshot simulations to experiments. In particular, we will emphasize area-based (as opposed to contour-based) image analysis metrics (e.g., Zernike moments) for comparison of x-ray self-emission images. The postshot metrics and methodology will be applied to the Big Foot implosion design as an example.

  2. FlexiTerm: a flexible term recognition method

    NARCIS (Netherlands)

    Spasic, I.; Greenwood, M.; Preece, A.; Francis, N.; Elwyn, G.

    2013-01-01

    BACKGROUND: The increasing amount of textual information in biomedicine requires effective term recognition methods to identify textual representations of domain-specific concepts as the first step toward automating its semantic interpretation. The dictionary look-up approaches may not always be sui

  3. Post-Polio Syndrome

    Science.gov (United States)

    ... or fatigue, this may overwork already stressed-out motor neurons and increase your risk of post-polio syndrome. Generally, post-polio syndrome is rarely life-threatening, but severe muscle weakness can lead to complications: Falls. Weakness in your leg muscles makes it ...

  4. Commitments by hostage posting

    NARCIS (Netherlands)

    Raub, W.; Baurmann, M.; Lahno, B.

    2009-01-01

    We survey research on incurring commitments by voluntary hostage posting as a mechanism of cooperation. The Trust Game is employed as a paradigmatic example of cooperation problems. We sketch a very simple game-theoretic model that shows how voluntary hostage posting can bind the trustee and thus in

  5. Post-Concussion Syndrome

    Science.gov (United States)

    ... if you're having problems with memory or problem-solving. There is no specific treatment for post-concussion ... for post-concussion syndrome if you have cognitive problems, as most of them ... or other techniques to work around memory deficits and attention skills. ...

  6. Fence Posts and Rails

    Science.gov (United States)

    Turton, Roger

    2016-01-01

    "Mathematical Lens" uses photographs as a springboard for mathematical inquiry and appears in every issue of "Mathematics Teacher." Recently while dismantling an old wooden post-and-rail fence, Roger Turton noticed something very interesting when he piled up the posts and rails together in the shape of a prism. The total number…

  7. Post-Session Authentication

    DEFF Research Database (Denmark)

    Ahmed, Naveed; Jensen, Christian D.

    2012-01-01

    . In this paper, we consider the case of post-session authentication, where parties authenticate each other at the end of their interactive session. This use of authentication is different from session-less authentication (e.g., in RFID) and pre-session authentication (e.g., for access control.) Post...

  8. [Flexible root posts].

    Science.gov (United States)

    Vadachkoriia, N R; Mandzhavidze, N A; Gumberidze, N Sh

    2009-02-01

    The article discusses the current state of restoration techniques of root canal treatment. Nowadays, technical progress allows manufacturers to develop flexible fiberglass posts, aspiring not only to an excellent aesthetics and mechanical properties (first of all, in comparison with metal and cast posts), but also to maintenance of their radio density and a wide range of forms. Growth of fiberglass posts popularity testifies to their clinical efficiency that also is confirmed by results of long-term researches. Introduction of fiberglass posts in a dental practice has rendered huge influence on restoration techniques of root canal treatment. Convincing factors of fiberglass posts superiority provide restoration the appearance similar with the natural dentition; possess close to dentine elasticity; creation of monolithic structure with hard tooth tissues and composite cement, posts, in case of need, can be easily adjusted on length, adhesive linkage of posts gives them additional stability. Modern researches have confirmed that only elastic, namely carbon fiber and the fiberglass posts made of modern technologies possess similar physical properties, as tooth structure. They can create reliable biomimetic design; solve a complex of aesthetic and functional restoration problems.

  9. Post-Stroke Rehabilitation

    Science.gov (United States)

    ... PDF (704 kb) » Spanish Version » Order Materials » Post-Stroke Rehabilitation In the United States more than 700,000 ... best possible long-term outcome. What is post-stroke rehabilitation? Rehabilitation helps stroke survivors relearn skills that are ...

  10. Utilidad de la goniometría en la evaluación del rango de los movimientos de flexión y extensión de la articulación del codo canino The useful of goniometry to evaluate the range of the elbow flexion and extension in dogs

    Directory of Open Access Journals (Sweden)

    M. C. Mercado

    2008-12-01

    Full Text Available La goniometría es una técnica muy utilizada en Kinesiología Humana para evaluar ángulos articulares. Los autores realizaron este trabajo con el objetivo de poder establecer si es tan útil en Medicina veterinaria para evaluar funcionalidad articular. Se eligió la articulación del codo canino debido a su complejidad. Fueron seleccionados 24 pacientes caninos derivados al Servicio de Fisioterapia del Hospital Escuela de la Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Argentina; con diagnóstico de luxación traumática de codo y resolución quirúrgica correspondiente, registrándose los datos de la primera sesión de fisioterapia con un goniómetro manual para evaluar el rango de movilidad de flexión-extensión de codo bilateral, estableciéndose el miembro contralateral, como valor normal para dicho paciente. El mismo procedimiento fue llevado a cabo en la decimosexta sesión de fisioterapia y por el mismo fisioterapeuta. Para el análisis estadístico se utilizó el test de Wilcoxon para todas las comparaciones, observándose que al término de la decimosexta sesión, si bien no se llega a los valores normales de un miembro sano, existe registro de evolución favorable con respecto a la primera sesión fisioterápica. Se estableció que proporciona un criterio objetivo para documentar el progreso de la rehabilitación.Goniometry is a technique widely used in human Kinesiotherapy to evaluate articular angles and demostrated to be a very valuable tool. The authors carried out this work to establish if it is as useful in veterinary medicine to evaluate articular functionality and they chose the elbow joint due to its complexity. 24 canine patients derived to the Physical Therapy Unit of the Veterinary Medicine Teaching Hospital of the Buenos Aires University, Argentine, with a diagnosis of traumatic elbow luxation and its corresponding surgical correction, were selected. During the first physical therapy session data were

  11. Post-Approval Studies

    Data.gov (United States)

    U.S. Department of Health & Human Services — The CDRH Post-Approval Studies Program encompasses design, tracking, oversight, and review responsibilities for studies mandated as a condition of approval of a...

  12. Standard Specification for Forged or Rolled UNS N06030, UNS N06022, UNS N06035, UNS N06200, UNS N06059, UNS N10362, UNS N06686, UNS N08020, UNS N08367, UNS N10276, UNS N10665, UNS N10675, UNS N10629, UNS N08031, UNS N06045, UNS N06025, UNS R20033 Alloy Pipe Flanges, Forged Fittings, and Valves and Parts for Corrosive High-Temperature Service

    CERN Document Server

    American Society for Testing and Materials. Philadelphia

    2015-01-01

    Standard Specification for Forged or Rolled UNS N06030, UNS N06022, UNS N06035, UNS N06200, UNS N06059, UNS N10362, UNS N06686, UNS N08020, UNS N08367, UNS N10276, UNS N10665, UNS N10675, UNS N10629, UNS N08031, UNS N06045, UNS N06025, UNS R20033 Alloy Pipe Flanges, Forged Fittings, and Valves and Parts for Corrosive High-Temperature Service

  13. Computer Security: posting and mis-posting

    CERN Multimedia

    Stefan Lueders, Computer Security Team

    2015-01-01

    This is what can happen at CERN if you don't lock your computer screen...   “Hi, I am looking for a partner either male or female to attend salsa lessons. I have a great body and enjoy rubbing it against other people on the dance floor. I would consider dinner after with the right person. If you think you can keep up with me and enjoy getting sweaty send me a reply. Stay sexy…” This is the original text of a recent posting on the CERN Market webpage. Some people might find this appealing, some people think this is funny. Personally, I couldn’t care less. But professionally, we had to follow up as this text can be perceived as inappropriate and, thus, in violation of the Terms of Usage of the CERN Market as well as the CERN Computing Rules and its annex on private usage of the CERN computing facilities. We remind you that the CERN Market is a public website that can be used by people within but also outside CERN. All posts are visible world...

  14. Esthetic Intracanal Posts

    Science.gov (United States)

    Parčina, Ivana; Amižić

    2016-01-01

    The primary function of an endodontic post is to provide retention for the core and enable full sealing of the coronal portion of the root canal. Traditionally used metal posts do not meet the requirements of modern dental medicine due to some fairly significant drawbacks such as color, corrosion potential, non-adhesive bonding and high modulus of elasticity which can lead to root fracture. Recently, esthetic ceramic and fiber reinforced posts have been manufactured in order to avoid such imperfections. Since much attention has been devoted to the esthetic aspects of dental medicine, the use of these posts with composite/ceramic cores is very common in restorative dentistry and it is actually becoming a standard. This is due to the fact that, apart from being an esthetically pleasing material, they are also biocompatible, have good physical properties and the capacity of adhesive bonding to tooth tissue and core buildup. Nonetheless, a good clinician should know how to spot the difference between them in order to select and use the appropriate post system in each specific situation. PMID:27789912

  15. The "Post-Post Period" and Environmental Education Research

    Science.gov (United States)

    McKenzie, Marcia

    2005-01-01

    Described as "post-experimental" and of the "post-post period," the current moment in social science research is typified by multi-voiced texts, researcher reflexivity, cultural criticism, and experimental works; characteristics in keeping with post-structurally informed understandings of social science research as contingent, evolving and messy.…

  16. Post-partum pancreatitis.

    Directory of Open Access Journals (Sweden)

    Pai P

    1993-04-01

    Full Text Available Acute pancreatitis in pregnancy and post-partum period, rarely encountered in surgical practice, can have a lethal effect on the mother and the foetus. We report here a case of a 35 year old tertigravida who presented with high grade fever, abdominal pain with distension, tachycardia and tachypnoea. Chest examination and X-rays were suggestive of pneumonia. The abdomen was tense and tender. Peristalsis was absent. Ultrasound revealed presence of fluid in the abdominal cavity which on paracentesis was found to contain Gram positive cocci. Fluid amylase levels were high. On exploratory laparotomy, haemorrhagic oedematous pancreatitis was noticed. The patient expired on the 2nd post operative day.

  17. Post-human Viewing

    DEFF Research Database (Denmark)

    Blaagaard, Bolette

    2013-01-01

    to become part of a global cultural flow, thus calling into question the physical connection between viewer and image. This article analyses what happens to that connection when not only the image but also the physical body is mediated and challenged in post-human relations, and examines the ensuing ethical...... implications. The author takes photojournalism and, in particular, mobile phone footage as a starting point for an exploration of the (post-human) body as evidence and sign of authenticity in the modern age of digital communications and journalism....

  18. Multifractal Measure of Post Distribution in Post System

    Institute of Scientific and Technical Information of China (English)

    CHEN Li; HUANG Deng-shi

    2009-01-01

    In order to investigate the true post distribution in the whole society, microelasticity (MIE) and macroelasticity (MAE) were defined by regarding all posts as a system. On this basis, the method for measuring post distribution was proposed. Using the Legendre dual transformation between MIE and MAE to highlight the probabilities of different levels, the post distribution were analyzed hierarchically. The two-scale Cantor model verified that the multifractal measure is applicable to the post distribution evolution process.

  19. Post trauma abdominal cocoon.

    Science.gov (United States)

    Kaur, Supreet; Doley, Rudra Prasad; Chabbhra, Mohinish; Kapoor, Rajeev; Wig, Jaidev

    2015-01-01

    Abdominal cocoon or sclerosing peritonitis refers to a rare cause of intestinal obstruction due to formation of a membrane encasing the bowel. We report a case of abdominal cocoon post blunt trauma abdomen. The patient presented with a history of subacute intestinal obstruction and a mobile abdomen lump. Abdominal cocoon was diagnosed on computed tomography. He underwent adhesiolysis with excision of membrane.

  20. [Post-transfusional AIDS].

    Science.gov (United States)

    Azzini, M; Maccabruni, A; Marcellini, M; Michelone, G; Dei Cas, A

    1987-01-01

    Two cases of post-transfusional AIDS in two premature babies who received blood of the same seropositive donor, are reported. The risk of the susceptibility to HIV infection of these patients, in relation to the immaturity of immune system and to the transfusional treatment often necessary in premature newborns, is stressed.

  1. Teaching Post Keynesian Economics

    DEFF Research Database (Denmark)

    Madsen, Poul Thøis

    2013-01-01

    Denne bog har gør gældende, at post keynesiansk økonomi har sit egen metodiske og didaktiske grundlag, og dens realistisk analyse er tiltrængt i den aktuelle økonomiske og finansielle krise. På et tidspunkt hvor det oprindelige indhold i Keynes 'General Theory ikke længere er til stede i de flest...

  2. Post-duralpunktur hovedpine

    DEFF Research Database (Denmark)

    Dahl, J B; Rosenberg, J

    1990-01-01

    Post dural puncture headache is one of the major complications of spinal anaesthesia. In order to establish this diagnosis, the headache must be dependent on the position of the patient. The symptoms are probably due to leakage of cerebro-spinal fluid from the subarachnoid space to the epidural...

  3. Post Rule of Law

    DEFF Research Database (Denmark)

    Carlson, Kerstin Bree

    2016-01-01

    addresses the practice of hybridity in ICP, drawing examples from the construction and evolution of hybrid procedure at the International Criminal Tribunal for the Former Yugoslavia (ICTY), to argue that the hybridity practiced by international criminal tribunals renders them ‘post rule of law’ institutions...

  4. Teaching Post Keynesian Economics

    DEFF Research Database (Denmark)

    Madsen, Poul Thøis

    2013-01-01

    Denne bog har gør gældende, at post keynesiansk økonomi har sit egen metodiske og didaktiske grundlag, og dens realistisk analyse er tiltrængt i den aktuelle økonomiske og finansielle krise. På et tidspunkt hvor det oprindelige indhold i Keynes 'General Theory ikke længere er til stede i de flest...

  5. Towards Flange-to-Flange Turbopump Simulations for Liquid Rocket Engines

    Science.gov (United States)

    Kiris, Cetin; Williams, Robert

    2000-01-01

    The primary objective of this research is to support the design of liquid rocket systems for the Advanced Space Transportation System. Since the space launch systems in the near future are likely to rely on liquid rocket engines, increasing the efficiency and reliability of the engine components is an important task. One of the major problems in the liquid rocket engine is to understand fluid dynamics of fuel and oxidizer flows from the fuel tank to plume. Understanding the flow through the entire turbopump geometry through numerical simulation will be of significant value toward design. This will help to improve safety of future space missions. One of the milestones of this effort is to develop, apply and demonstrate the capability and accuracy of 3D CFD methods as efficient design analysis tools on high performance computer platforms. The development of the MPI and MLP versions of the INS3D code is currently underway. The serial version of INS3D code is a multidimensional incompressible Navier-Stokes solver based on overset grid technology. INS3D-MPI is based on the explicit massage-passing interface across processors and is primarily suited for distributed memory systems. INS3D-MLP is based on multi-level parallel method and is suitable for distributed-shared memory systems. For the entire turbopump simulations, moving boundary capability and an efficient time-accurate integration methods are build in the flow solver. To handle the geometric complexity and moving boundary problems, overset grid scheme is incorporated with the solver that new connectivity data will be obtained at each time step. The Chimera overlapped grid scheme allows subdomains move relative to each other, and provides a great flexibility when the boundary movement creates large displacements. The performance of the two time integration schemes for time-accurate computations is investigated. For an unsteady flow which requires small physical time step, the pressure projection method was found to be computationally efficient since it does not require any subiterations procedure. It was observed that the artificial compressibility method requires a fast convergence scheme at each physical time step in order to satisfy incompressibility condition. This was obtained by using a GMRES-ILU(0) solver in our computations. When a line-relaxation scheme was used, the time accuracy was degraded and time-accurate computations became very expensive. The current geometry for the LOX boost turbopump has various rotating and stationary components, such as inducer, stators, kicker, hydrolic turbine, where the flow is extremely unsteady. Figure 1 shows the geometry and computed surface pressure of the inducer. The inducer and the hydrolic turbine rotate in different rotational speed.

  6. Communication from La Poste

    CERN Multimedia

    2005-01-01

    We should like to remind users that post sent to the CERN site must be correctly addressed in order to reach the right destination as quickly as possible: Correspondence (goods subject to Swiss VAT): Surname, first name CERN (Department, Building & Mailbox) Route de Meyrin 385 Case Postale 1211 Genève 23 CERN (Switzerland) Official orders (goods not subject to Swiss VAT): CERN Goods Reception Order number ( Ca, Ct, Cl....) For the attention of: (surname, first name) Route de Meyrin 385 Case Postale 1211 Genève 23 CERN (Switzerland) Please inform your suppliers of the above addresses. Last minute Swiss motorway sticker on sale at the POST OFFICE, Main Building (63 R 02) 40.- CHF

  7. Communication from La Poste

    CERN Multimedia

    2005-01-01

    We should like to remind users that post sent to the CERN site must be correctly addressed in order to reach the right destination as quickly as possible: Correspondence (goods subject to Swiss VAT): Surname, first name CERN (Department, Building & Mailbox) Route de Meyrin 385 Case Postale 1211 Genève 23 CERN (Switzerland) Official orders (goods not subject to Swiss VAT): CERN Goods Reception Order number ( Ca, Ct, Cl....) For the attention of: (surname, first name) Route de Meyrin 385 Case Postale 1211 Genève 23 CERN (Switzerland) Please inform your suppliers of the above addresses. Last minute Swiss motorway sticker on sale at the POST OFFICE, Main Building (63 R 02) 40.- CHF

  8. Post trauma abdominal cocoon

    Directory of Open Access Journals (Sweden)

    Supreet Kaur

    2015-01-01

    Full Text Available Abdominal cocoon or sclerosing peritonitis refers to a rare cause of intestinal obstruction due to formation of a membrane encasing the bowel. We report a case of abdominal cocoon post blunt trauma abdomen. The patient presented with a history of subacute intestinal obstruction and a mobile abdomen lump. Abdominal cocoon was diagnosed on computed tomography. He underwent adhesiolysis with excision of membrane.

  9. Post-ATC Reviews

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ Guatemala City,a most populous and prosperous metropolitan in Central America,was once again an eye-catcher for hosting for the second time,on April 16-19,the Council of Representatives'meeting of International Textile andClothing Bureau(ITCB)at the time when it has been already two years post the Agreement on Textiles and Clothing (ATC).

  10. Post-thyroidectomy hemorrhage

    DEFF Research Database (Denmark)

    Godballe, Christian; Madsen, Anders Rørbaek; Pedersen, Henrik Baymler;

    2009-01-01

    risk factors for hemorrhage. Increased hospital stay and infection rates were found in patients treated with drainage. The median time for onset of postoperative hemorrhage was 3 h (range 0-105). Compared with international literature our incidence of post-thyroidectomy hemorrhage is relatively high....... Improvement might be reached by the exchange of experience between departments with focus on adequate surgical technique and careful hemostasis....

  11. Síndrome post

    OpenAIRE

    Avalos, Raquel

    2014-01-01

    ¿Qué sigue luego de que una mujer terminara su relación con el último hombre que amaba? Eso, dicen ellas, depende de cuanto duró el romance o cómo sea la psiquis de cada amante. Lo cierto es que el escenario post convierte a algunas en depresivas, caletas, indiferentes y hasta amnésicas. ¿Qué te parece, varón?

  12. LHC support post

    CERN Multimedia

    1995-01-01

    LHC support post prototype, which dates in 1995, in a long development period which started in the early ’90s and continued until the end of the decade. The wires next to the support post are probably wires from strain gauges, which are employed to measure the stress level in the material when the support is mechanically loaded. These supports are mechanically optimized to withstand a weight of up to 100Kn (10 tons) while being as thin as possible to minimize conduction heat to magnets. This is the reason why the stress measurement was extensively done in the prototyping phase. About support posts: The high magnetic fields needed for the LHC can only be reached using superconductors. At very low temperatures, superconductors have no electrical resistance and therefore no power loss. The LHC will be the largest superconducting installation ever built and, at 1.9 degrees above absolute zero (300 degrees below room temperature), one of the the coldest objects in the universe! The magnet supports have to brid...

  13. Post-Cruise Questionnaire - Legacy

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Post-Cruise Questionnaire is a mandatory post trip legal document that observers fill out after every trip they have completed.

  14. Post-Cruise Questionnaire - Legacy

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Post-Cruise Questionnaire is a mandatory post trip legal document that observers fill out after every trip they have completed.

  15. [Post-stripping telangiectasis].

    Science.gov (United States)

    Hutinel, B; Maraval, M

    1985-01-01

    These telangiectasia appear between one and six months after the operation, especially in cases of capillary fragility. The most common localizations are the antero-internal and external sides of the thighs and knees. Unnecessary strippings, of continent saphenous veins, are the most frequent cause of these. Their prevention consists of the least possible traumatising stripping, using a fine stripper, a very rigorous post-operative support, and the wearing of light varicose stockings or tights for between one and three months. The treatment using microsclerosis, often delicate, should not be undertaken before six months.

  16. Post-tonsillectomy hemorrhage

    DEFF Research Database (Denmark)

    Heidemann, Christian; Wallén, Mia; Aakesson, Marie;

    2008-01-01

    Post-tonsillectomy hemorrhage (PTH) is a relatively common and potentially life-threatening complication. The objective of this study was to examine the rate of PTH and identify risk factors. A retrospective cohort study was carried out including all tonsillectomies (430 patients) performed...... as surgical technique" [relative risk (RR) = 5.3], "peritonsillar abscess as indication for surgery" (RR = 0.3) and "age equal to or above 15 years at the time of surgery" (RR = 5.4). It is concluded that patient age, PTA as indication for surgery and the use of coblation significantly affect the occurrence...

  17. Perioperative post graduate education.

    Science.gov (United States)

    Kapnoullas, J

    1997-04-01

    This article describes post-graduate perioperative education in Australia at the Australian Catholic University and St. Vincent's Public Hospital: The Graduate Certificate in Perioperative Practice. The Australian Catholic University operates from eight campuses along the east coast of Australia. There are approximately 9000 students along with 1000 staff. The University consists of major faculties that all have clear relevance to the workplace-namely Arts and Sciences, Education and Health Sciences. Qualifications are offered at Certificate of Doctoral level studies in the areas of business, education, ethics, human movement, management, information systems, music, nursing, religion, social work and theology.

  18. [Post-abortion contraception].

    Science.gov (United States)

    Ohannessian, A; Jamin, C

    2016-12-01

    To establish guidelines of the French National College of Gynecologists and Obstetricians about post-abortion contraception. A systematic review of the literature about post-abortion contraception was performed on Medline and Cochrane Database between 1978 and March 2016. The guidelines of the French and foreign scientific societies were also consulted. After an abortion, if the woman wishes to use a contraception, it should be started as soon as possible because of the very early ovulation resumption. The contraception choice must be done in accordance with the woman's expectations and lifestyle. The contraindications of each contraception must be respected. The long-acting reversible contraception, intra-uterine device (IUD) and implant, could be preferred (grade C) as the efficacy is not dependent on compliance. Thus, they could better prevent repeat abortion (LE3). In case of surgical abortion, IUD should be proposed and inserted immediately after the procedure (grade A), as well as the implant (grade B). In case of medical abortion, the implant can be inserted from the day of mifépristone, the IUD after an ultrasound examination confirming the success of the abortion (no continuing pregnancy or retained sac) (grade C). Copyright © 2016 Elsevier Masson SAS. All rights reserved.

  19. Shared consultant physician posts.

    LENUS (Irish Health Repository)

    Cooke, J

    2012-01-31

    Our aim was to assess the acceptability and cost-efficiency of shared consultancy posts. Two consultant physicians worked alternate fortnights for a period of twelve months. Questionnaires were distributed to general practitioners, nurses, consultants and junior doctors affected by the arrangement. Patients or their next of kin were contacted by telephone. 1\\/17 of consultants described the experience as negative. 14\\/19 junior doctors reported a positive experience. 11 felt that training had been improved while 2 felt that it had been adversely affected. 17\\/17 GPs were satisfied with the arrangement. 1\\/86 nurses surveyed reported a negative experience. 1\\/48 patients were unhappy with the arrangement. An extra 2.2 (p<0.001) patients were seen per clinic. Length of stay was shortened by 2.49 days (p<0.001). A saving of 69,212 was made due to decreased locum requirements. We present data suggesting structured shared consultancy posts can be broadly acceptable and cost efficient in Ireland.

  20. [Post-traumatic tics].

    Science.gov (United States)

    Alegre, S; Chacón, J; Redondo, L; Navarro-Busto, C; Solana, B

    1996-10-01

    Secondary tics are those in which an aetiology justifying them can be found, as compared to idiopathic tics, which make up the majority, and the Gilles de la Tourette syndrome (SGT), which is, at the moment, of unknown origin. Of the possible aetiologies described as causing tics, craneo-encephalic trauma has been mentioned on very few occasions. We present a case of post-traumatic tics (verbal and neck) in a young man of 24, and review the published cases which can be considered to be of post-traumatic tics. We have found six cases of tics secondary to traumas, all craneo-encephalic, like ours (the one under study). The time interval between the blow and the appearance of the tic or tics varied between 2 weeks and 3 months. The absence of significant lesions seen in the complementary investigations make it impossible for us to discover the site of the lesion caused by the trauma. However, the presence in some cases of other tics before the trauma, and of family histories of tics, supports the idea of a genetic basis or predisposition to suffer this disorder.

  1. Post-Quantum Cryptography

    DEFF Research Database (Denmark)

    Gauthier Umana, Valérie

    The security of almost all the public-key cryptosystems used in practice depends on the fact that the prime factorization of a number and the discrete logarithm are hard problems to solve. In 1994, Peter Shor found a polynomial-time algorithm which solves these two problems using quantum computers....... The public key cryptosystems that can resist these emerging attacks are called quantum resistant or post-quantum cryptosystems. There are mainly four classes of public-key cryptography that are believed to resist classical and quantum attacks: code-based cryptography, hash-based cryptography, lattice......-cyclic alternant codes and quasi-dyadic codes (joint work with Gregor Leander). We also present a deterministic polynomial-time algorithm to solve the Goppa Code Distinguisher problem for high rate codes (joint work with Jean-Charles Faugere, Ayoub Otmani, Ludovic Perret and Jean-Pierre Tillich). In the second...

  2. Post-representational cartography

    Directory of Open Access Journals (Sweden)

    Rob Kitchin

    2010-03-01

    Full Text Available Over the past decade there has been a move amongst critical cartographers to rethink maps from a post-representational perspective – that is, a vantage point that does not privilege representational modes of thinking (wherein maps are assumed to be mirrors of the world and automatically presumes the ontological security of a map as a map, but rather rethinks and destabilises such notions. This new theorisation extends beyond the earlier critiques of Brian Harley (1989 that argued maps were social constructions. For Harley a map still conveyed the truth of a landscape, albeit its message was bound within the ideological frame of its creator. He thus advocated a strategy of identifying the politics of representation within maps in order to circumnavigate them (to reveal the truth lurking underneath, with the ontology of cartographic practice remaining unquestioned.

  3. Post-streptococcal glomerulonephritis

    Directory of Open Access Journals (Sweden)

    Odalovic A.

    2014-01-01

    Full Text Available Post-streptococcal glomerulonephritis (PSGN is a frequent cause of acute nephritis in children. This case study was done with the aim to point out that the infections caused by Group A streptococci, in spite of antibiotic era, are still present in the population. An 8-year old boy was admitted in our hospital with a two-day history of fewer, tonsillopharyngitis. After hospital admission, patient was treated with penicillin during the period of 10 days, antihypertensive medications (captopril, furosemide, including restricted diet of salt. After the treatment, patient became better. On demission it was found proteinuria and microhematuria PSGN is very serious disease, which leaves severe complications if the valid therapy with penicillin is not used in propriety time, during the recommended period of 10 days.

  4. Post-Positivist Realism

    Institute of Scientific and Technical Information of China (English)

    Barbara; Foley

    2006-01-01

    本文作者对《重申身份》一书中所持的后实证现实主义(post-positivist realism)观点进行了深刻的批评。作者指出,从后实证现实主义立场出发论述身份问题会遭遇到逻辑与政治的难题。它所提供的答案只是症候式,而非实质性的。实际上,后现代主义在身份问题上所处的尴尬也是后实证现实主义所同样面临的。

  5. Post-treatment CIN

    DEFF Research Database (Denmark)

    Bais, Aagje G; Eijkemans, Marinus J C; Rebolj, Mateja;

    2009-01-01

    compared health-care costs and impact of individual hrHPV type on the risk of residual/recurrent CIN. Follow-up by abnormal cytology alone (6, 12 and 24 months after treatment according to the Dutch protocol) showed a lower specificity for detection of residual/recurrent CIN than follow-up by abnormal...... cytology and presence of hrHPV (80 vs. 91%, relative risk 0.87 (95% CI 0.77-0.99)). Both methods showed no significant difference in sensitivity ((86 vs. 100%) RR 0.86 (95% CI 0.63-1.16)). Comparing different post hoc modifications in the strategy of combined testing showed similar test characteristics...

  6. Post-traumatic syringomyelia

    Directory of Open Access Journals (Sweden)

    Agrawal Amit

    2007-01-01

    Full Text Available Progressive post-traumatic cystic syringomyelia is an uncommon and increasingly recognized cause of morbidity following spinal cord injury. We hereby report a 35-year-old gentleman who sustained wedge compression fracture of L-1 vertebral body 15 years back and had complete paraplegia with bowel/bladder involvement. The neurological deficit recovered with minimal residual motor deficits and erectile dysfunction. He presented now with increasing neurological deficits associated with pain and paresthesia. The MRI spine showed a syrinx extending from the site of injury up to the medulla. He underwent a syringo-peritoneal shunt and at follow-up his pain and motor functions had improved but erectile dysfunction was persisting.

  7. Post-16 update

    Science.gov (United States)

    1999-01-01

    Post-16 Initiative logo This is the first of a regular series of contributions from the Institute's Post-16 Initiative. The Initiative is taking a hard and searching look at the physics taught in schools and colleges from age 16 to age 19. To start with, it is responding to Government initiatives, but hopes to encourage and stimulate good practice in physics teaching on a longer time scale than can be afforded in making responses to current developments. Here Jon Ogborn writes about what AS courses need to be, while Peter Campbell gives his thoughts about teaching matter. Advanced Subsidiary physics: what should it be? From September 2000 all A-levels will be new. Students can take the first Advanced Subsidiary (AS) year and stop there - or decide to go on. In the Institute of Physics post-16 Initiative, we have been thinking how to provide a satisfying one-year experience of physics at the new AS level, and what it should achieve. The students will decide. So the AS course must give a decent picture of what physics is, what it offers for their futures, what interests it can satisfy. That all says breadth, with enough depth to see what is in store later. And this sounds like the right recipe for someone who is taking a single AS year of physics to broaden their A-level experience. It must also be attractive. A way forward is shown by the Salters - Horners course, attracting interest through leading from applications. Why does that work? It gives physics a story to tell, into which ideas fit and make sense. Our own new A-level, Advancing Physics, must also have interesting stories to tell, which must in addition build up an honest picture of physics. An example: teach electric circuits through modern sensing devices. Sensor instrumentation is a key activity of physicists, full of new ideas, but also simple. It makes essential use of circuits such as the potential divider. Practical work gets better things to do than checking the equation for resistors in parallel

  8. Retention of Root Canal Posts

    DEFF Research Database (Denmark)

    Sahafi, A; Benetti, Ana Raquel; Flury, S;

    2015-01-01

    The aim of this study was to investigate the effect of the cement film thickness of a zinc phosphate or a resin cement on retention of untreated and pretreated root canal posts. Prefabricated zirconia posts (CosmoPost: 1.4 mm) and two types of luting cements (a zinc phosphate cement [DeTrey Zinc......] and a self-etch adhesive resin cement [Panavia F2.0]) were used. After removal of the crowns of 360 extracted premolars, canines, or incisors, the root canals were prepared with a parallel-sided drill system to three different final diameters. Half the posts did not receive any pretreatment. The other half...... received tribochemical silicate coating according to the manufacturer's instructions. Posts were then luted in the prepared root canals (n=30 per group). Following water storage at 37°C for seven days, retention of the posts was determined by the pull-out method. Irrespective of the luting cement...

  9. Post combustion in converter steelmaking

    Energy Technology Data Exchange (ETDEWEB)

    Oghbasilasie, H.; Holappa, L.

    1997-12-31

    The purpose of this work is to study the fundamentals of post combustion and the effect of different process parameters on the post combustion ratio (PCR) and heat transfer efficiency (HTE) in converter steelmaking process. The PCR and HTE have been determined under normal operating conditions. Trials assessed the effect of lance height, vessel volume, foaming slag and pellet additions on PCR and HTE. Based on enthalpy considerations, post combustion of CO gas is regarded as one of the most effective means of increasing the heat supply to the BOP. The thermodynamic study of gas-metal-slag reactions gives the limiting conditions for post combustion inside the converter reactor. Different process parameters influencing both thermodynamic equilibria and kinetic conditions can greatly affect the post combustion ratio. Different features of converter processes as well smelting reduction processes utilizing post combustion have been reviewed. (orig.) SULA 2 Research Programme; 26 refs.

  10. The post-transcriptional operon

    DEFF Research Database (Denmark)

    Tenenbaum, Scott A.; Christiansen, Jan; Nielsen, Henrik

    2011-01-01

    A post-transcriptional operon is a set of monocistronic mRNAs encoding functionally related proteins that are co-regulated by a group of RNA-binding proteins and/or small non-coding RNAs so that protein expression is coordinated at the post-transcriptional level. The post-transcriptional operon...... model (PTO) is used to describe data from an assortment of methods (e.g. RIP-Chip, CLIP-Chip, miRNA profiling, ribosome profiling) that globally address the functionality of mRNA. Several examples of post-transcriptional operons have been documented in the literature and demonstrate the usefulness...

  11. Battery Post-Test Facility

    Data.gov (United States)

    Federal Laboratory Consortium — Post-test diagnostics of aged batteries can provide additional information regarding the cause of performance degradation, which, previously, could be only inferred...

  12. NEWS: Post-16 update

    Science.gov (United States)

    Campbell, Peter

    2000-07-01

    post16.gif As a teacher of physics it is very easy to become preoccupied with particulars of courses, or topics or even single concepts. Concerned with imminent student audiences and desired learning outcomes, the daily challenge is to summon satisfactory teaching approaches and resources for the job at hand. For the conscientious teacher, assessment outcomes may too often seem a judgment on our own efforts rather than those of our students. From time to time we may step back and think bigger, for example while planning a recruitment event, or while away from work on holiday. We may be successful locally. But why, at a time when books and television documentaries popularizing science have a large following, has physics education been facing declining numbers? Many recognize that physics has an essential contribution to make to the training of science or engineering specialists, but we know that it is also important for the skilled worker, the informed citizen and, in fact, for anyone trying to make sense of the world. So what are the best ways forward for post-16 physics? To make any impact on the bigger picture requires organization, thinking and meeting time among people in diverse roles: teachers and curriculum managers; university lecturers; employers and professional bodies; unitary awarding bodies; regulatory and funding agencies; and even Government. For the past few years, the Institute of Physics post-16 Initiative has created an unrivalled opportunity to address the wider issues. Its Shaping the Future booklets series was designed to stimulate informed discussion and debate, by providing background information and analysis. Taken together, the booklets should help all those concerned with physics education to understand where we are now, and why. Literally dozens of people have contributed to a review and analysis of physics education. Each booklet is a 48-page smorgasbord in A4 landscape format, containing many examples of good practice, basic but

  13. post-industrial

    Directory of Open Access Journals (Sweden)

    Omar Guerrero

    2005-01-01

    Full Text Available Hoy en día la sociedad postindustrial se manifiesta en cinco dimensiones: un sector económico; una distribución ocupacional; la centralidad del conocimiento teórico; una orientación del futuro con base en el control de la tecnología y una hechura de decisiones orientadas por la nueva tecnología intelectual. De ahí nace la motivación del presente trabajo, el cual consiste en analizar la gerencia pública en la sociedad postindustrial, a través del análisis documental. Así, en consonancia con las condiciones presentes, esta sociedad da cobijo a una administración pública que se consolida en las relaciones de dominación, es decir el gobierno de los hombres; junto a una gerencia que asume la gestión de las cosas. Actualmente, en suma, la administración pública mantiene sus rasgos esenciales, sin menoscabo de convivir una época en la cual los cambios producidos por la post- industrialización provoca el advenimiento de la modalidad d la gerencia de servicios.

  14. Recovery post ICU.

    Science.gov (United States)

    Jones, Christina

    2014-10-01

    Many ICU patients struggle to recovery following critical illness and may be left with physical, cognitive and psychological problems, which have a negative impact on their quality of life. Gross muscle mass loss and weakness can take some months to recover after the patients' Intensive Care Unit (ICU) discharge, in addition critical illness polyneuropathies can further complicate physical recovery. Psychological problems such as anxiety, depression and post traumatic stress disorder (PTSD) are common and have an negative impact on the patients' ability to engage in rehabilitation after ICU discharge. Finally cognitive deficit affecting memory can be a significant problem. The first step in helping patients to recover from such a devastating illness is to recognise those who have the greatest need and target interventions. Research now suggests that there are interventions that can accelerate physical recovery and reduce the incidence of psychological problems such as anxiety, depression and PTSD. Cognitive rehabilitation, however, is still in its infancy. This review will look at the research into patients' recovery and what can be done to improve this where needed.

  15. NEWS: Post-16 update

    Science.gov (United States)

    1999-05-01

    (post16) Making physics connect Doesn't Melvyn Bragg do a wonderful job, engaging both scientists and artists in sensitive discussion on Radio 4 about their methods and their purposes? But every week teachers have the chance to show their students that physics is a way of seeing the world that is well-connected with other aspects of knowledge and culture. The stakes are high: students who fail to appreciate this generally choose not to study the subject beyond GCSE. Most students find our preoccupation with technical detail off-putting. Accepting that we have a syllabus to cover, it's still a question of balance. In our teaching we should aim for variety in order to find ways to connect with every student's interests. Also, we can show that we (the nearest embodiment of a physicist some students will experience) are multidimensional and so fully human. Most important, teachers need flexibility to both encourage and respond to student comment and questions. The first booklet in the discussion series Shaping the Future takes up these themes. Rich in ideas for both immediate use and the longer term, it aims to stimulate debate and improve teaching. Copies cost £5.50 including postage and are available from Ingrid Ebeyer, Post-16 Initiative, Institute of Physics, 76 Portland Place, London W1N 3DH. How far is it? This question is asked in many family cars and school minibuses at the start of a journey, and answered by most in terms of hours and minutes rather than miles. What a good idea for introducing a social and historical perspective to a lesson on distance, velocity and time. How far can you actually get in a day? What is the range of human activity? Walking for eight hours will get many people about 25 miles. A pack horse will progress at much the same rate, but fast riding or a coach and team of horses will get further. Motorway driving (when the cones are on holiday) would take you nearly 500 miles. The 05.15 am train from Penzance arrives in Inverness at 7

  16. Analysis of vector models in quantification of artifacts produced by standard prosthetic inlays in Cone-Beam Computed Tomography (CBCT)--a preliminary study.

    Science.gov (United States)

    Różyło-Kalinowska, Ingrid; Miechowicz, Sławomir; Sarna-Boś, Katarzyna; Borowicz, Janusz; Kalinowski, Paweł

    2014-11-17

    Cone-beam computed tomography (CBCT) is a relatively new, but highly efficient imaging method applied first in dentistry in 1998. However, the quality of the obtained slices depends among other things on artifacts generated by dental restorations as well as orthodontic and prosthetic appliances. The aim of the study was to quantify the artifacts produced by standard prosthetic inlays in CBCT images. The material consisted of 17 standard prosthetic inlays mounted in dental roots embedded in resin. The samples were examined by means of a large field of view CBCT unit, Galileos (Sirona, Germany), at 85 kV and 14 mAs. The analysis was performed using Able 3DDoctor software for data in the CT raster space as well as by means of Materialise Magics software for generated vector models (STL). The masks generated in the raster space included the area of the inlays together with image artifacts. The region of interest (ROI) of the raster space is a set of voxels from a selected range of Hounsfield units (109-3071). Ceramic inlay with zirconium dioxide (Cera Post) as well as epoxy resin inlay including silica fibers enriched with zirconium (Easy Post) produced the most intense artifacts. The smallest image distortions were created by titanium inlays, both passive (Harald Nordin) and active (Flexi Flange). Inlays containing zirconium generated the strongest artifacts, thus leading to the greatest distortions in the CBCT images. Carbon fiber inlay did not considerably affect the image quality.

  17. Analysis of Vector Models in Quantification of Artifacts Produced by Standard Prosthetic Inlays in Cone-Beam Computed Tomography (CBCT – a Preliminary Study

    Directory of Open Access Journals (Sweden)

    Ingrid Różyło-Kalinowska

    2014-11-01

    Full Text Available Cone-beam computed tomography (CBCT is a relatively new, but highly efficient imaging method applied first in dentistry in 1998. However, the quality of the obtained slices depends among other things on artifacts generated by dental restorations as well as orthodontic and prosthetic appliances. The aim of the study was to quantify the artifacts produced by standard prosthetic inlays in CBCT images. The material consisted of 17 standard prosthetic inlays mounted in dental roots embedded in resin. The samples were examined by means of a large field of view CBCT unit, Galileos (Sirona, Germany, at 85 kV and 14 mAs. The analysis was performed using Able 3DDoctor software for data in the CT raster space as well as by means of Materialise Magics software for generated vector models (STL. The masks generated in the raster space included the area of the inlays together with image artifacts. The region of interest (ROI of the raster space is a set of voxels from a selected range of Hounsfield units (109-3071. Ceramic inlay with zirconium dioxide (Cera Post as well as epoxy resin inlay including silica fibers enriched with zirconium (Easy Post produced the most intense artifacts. The smallest image distortions were created by titanium inlays, both passive (Harald Nordin and active (Flexi Flange. Inlays containing zirconium generated the strongest artifacts, thus leading to the greatest distortions in the CBCT images. Carbon fiber inlay did not considerably affect the image quality.

  18. What is 'Post-digital?'

    NARCIS (Netherlands)

    F. Cramer

    2014-01-01

    The term "post-digital" was coined in 2000 for electronic music, but reflecting on larger developments in technology and culture, to describe a perspective on digital information technology that is no longer focused on technical innovation or improvement. In the meantime, "post-digital" has acquired

  19. Post-Exposure Prophylaxis (PEP)

    Science.gov (United States)

    ... Pre-Exposure Prophylaxis (PrEP) Post-Exposure Prophylaxis (PEP) HIV Treatment HIV Treatment: The Basics Just Diagnosed: Next Steps After Testing ... HIV HIV and Mental Health How to Find HIV Treatment Services HIV Prevention Post-Exposure Prophylaxis (PEP) (Last ...

  20. Post-16 update

    Science.gov (United States)

    1999-03-01

    Post-16 Initiative logo Physics in Mathematical Mood Later this year, as part of the post-16 initiative of the Institute of Physics, a booklet with the above title will be published. In draft form, the booklet was discussed at the ASE conference in January. Some of the issues raised are briefly set out here. If you have any views to contribute, please write to Simon Carson at the Institute of Physics or e-mail simon.carson@physics.org. A mathematical view of the world is intrinsically a part of physics and therefore physics should be studied in an appropriately mathematical way. However, we all know that, to some students at least, mathematics proves to be a stumbling block rather than a powerful aid to understanding. So how can we help? Realizing that as physics teachers we need to deliver the mathematics necessary to an understanding of our subject is a start. Its corollary is that we need to find the space within the physics core. We may wish to use supplementary courses such as AS mathematics or QCA's new free-standing mathematics units, but requiring additional courses as a prerequisite to a study of A-level physics may deter students. Teaching the mathematics in context may aid understanding but we also must ensure that techniques are seen in a variety of contexts and that at some point the tool is abstracted from the background. As teachers we need to be aware of the very basic mathematical difficulties that students bring with them: the use of calculators, standard form, simple algebraic manipulation, for example. Mathematical arguments need to be developed fully and carefully. Encouraging cooperation and discussion between students may help the less able to understand and the more able to appreciate and develop their own understanding through making explicit their reasoning by explaining it to others. And what of new technology? Software tools allow students to develop their understanding about graphs, for example, enabling them to investigate the

  1. POST-RELIGION: TRADITIONALISTS’ ANALYSIS

    Directory of Open Access Journals (Sweden)

    Kirill M. Tovbin

    2013-12-01

    Full Text Available Aim of the study is to describe the phenomenon of post-religion as a specific spiritual sphere of the Post-modernity. Methodology. In the introduction analyzed a variety of methodological approaches, opening his inadequacy applied to the spiritual sphere of Post-modernity: «classic» religious studies, religious studies of traditional spiritual movements and the post-modern religious studies, partly produced Traditionalist school, could - according to the author's hypothesis - become a methodological basis for the most complete analysis of post-religion. Scientific novelty. In the main part of the article crystallized the authorized concept of post-religion, its relation with traditional and religious spiritual realms. Post-religion is positioned as the top of secularism enshrined in the departure from the straight and aggressive secularism of the Modernity, but without recourse to Tradition. Post-religion a simulation spirituality, skillfully imitating the outer areas of traditional spirituality and creates a planar religiosity, radically preventing attached to the vertical line of Traditions. In this regard, are the main artificially selected parameters of post-religion: deconstruction, splitting, virtualization, and collage. Deconstruction is a transformation of spirituality in semiotic set for egocentric selectivity of modern believer. Post-religion’s splitting is deprivation of spirituality center, destruction of sacral Center and the transformation of spirituality in the plane on which the intellectual and sensual wandering post-believer from one semiotic island to another. Virtualization is a displacement field of spiritual tension in a completely virtual area, isolated from the natural conditions of existence and created as his replacement, network discussion sites and galleries. Collage is an arbitrary combination of different semiotic pieces of Tradition with the aim of creating a believable picture of tradition; it is collage leads

  2. [Post-mortem microbiology analysis].

    Science.gov (United States)

    Fernández-Rodríguez, Amparo; Alberola, Juan; Cohen, Marta Cecilia

    2013-12-01

    Post-mortem microbiology is useful in both clinical and forensic autopsies, and allows a suspected infection to be confirmed. Indeed, it is routinely applied to donor studies in the clinical setting, as well as in sudden and unexpected death in the forensic field. Implementation of specific sampling techniques in autopsy can minimize the possibility of contamination, making interpretation of the results easier. Specific interpretation criteria for post-mortem cultures, the use of molecular diagnosis, and its fusion with molecular biology and histopathology have led to post-mortem microbiology playing a major role in autopsy. Multidisciplinary work involving microbiologists, pathologists, and forensic physicians will help to improve the achievements of post-mortem microbiology, prevent infectious diseases, and contribute to a healthier population.

  3. Takotsubo cardiomyopathy post liver transplantation.

    Science.gov (United States)

    Vachiat, Ahmed; McCutcheon, Keir; Mahomed, Adam; Schleicher, Gunter; Brand, Liezl; Botha, Jean; Sussman, Martin; Manga, Pravin

    2016-10-23

    A patient with end-stage liver disease developed stress-induced Takotsubo cardiomyopathy post liver transplantation, with haemodynamic instability requiring a left ventricular assist device. We discuss the diagnosis and management of this condition.

  4. Calorie Posting in Chain Restaurants

    OpenAIRE

    Bryan Bollinger; Phillip Leslie; Alan Sorensen

    2010-01-01

    We study the impact of mandatory calorie posting on consumers' purchase decisions, using detailed data from Starbucks. We find that average calories per transaction falls by 6%. The effect is almost entirely related to changes in consumers' food choices--there is almost no change in purchases of beverage calories. There is no impact on Starbucks profit on average, and for the subset of stores located close to their competitor Dunkin Donuts, the effect of calorie posting is actually to increas...

  5. Post-16 update

    Science.gov (United States)

    1999-09-01

    Institute of Physics post-16 initiative, shaping the future Physics education based in IT - sorry ICT! Which, of course, makes for a nifty headline, but as is so often the case with neat slogans, little else. Two formative questions: What, in another decade, will the government of the day call `What you lot should be doing with computers'? and What, of the many things that currently exercise our intellects, will there be anything special to say about in a decade, concerning the use of computers in the teaching of physics? Advancing Physics represents some attempts to come to grips with the second of the two questions above. The first is left to a higher wisdom. In thinking about learning, what can we do with the huge processing power, increasingly available in smaller and less obtrusive packages? What will we do that helps people learn physics, both tomorrow and in 2009? Here are a few suggestions based on development work so far. Wide, reliable and shared access to well ordered learning resources. We have created a CD-ROM, with versions for both student and teacher, that provides a wide range of resources. These do not teach, but do provide. A commitment to allowing a course to evolve and adapt. Electronic publication puts the costs into origination, and not into publication and distribution. A website allows for the community of users to contribute. E-mail networks support individuals and propagate good practice. You can create and explore your own microworlds. The interactive nature of models, and the crafted relationships between the models and the natural world give an insight into the creative imaginary worlds of the physicist. The unreasonable, but pleasurable, success of mathematics in describing the natural world can come to the fore. Measurements that were not possible before are now possible. What was previously indirect, and inaccessible, now becomes a direct measurement, making relationships transparent in new and fruitful ways. The dichotomy between

  6. 支柱瓷绝缘子的带电检测方法%The Investigation of Live Detection Method on Porcelain Post Insulator

    Institute of Scientific and Technical Information of China (English)

    李岩; 杨浩; 吴国忠; 马明烨; 李亮; 李喆; 包艳蓉

    2013-01-01

    现有的检测技术无法实现对支柱瓷绝缘子进行带电检测.采用振动声学法获得试样绝缘子的固有频率,以此判断支柱绝缘子的承载能力.试验证明,当试样固有频率高于和低于机械状况良好的绝缘子振动驻波频率(4.5 kHz)时都表明在法兰区域存在缺陷.该检测方法不仅实现了支柱绝缘子的带电检测,且检测方法可靠.%There is no availble live detection technology for porcelain post insulator today.In this article, we get natural frequency of insulator by the vibration sound research method in order to judge the carrying capacity of insulator, and take comparison of natural frequency between tested specimen and insulator with good condition by Vibro-acoustic technology.And through a large number of experiments, this detection technology is found viable.Above or below the natural frequency(4.5 kHz) indicates the presence of defects in the flange region.The detection method not only makes live detection available, but also extends the future work easily.

  7. Evaluacion no lineal de dos postes diferentes.(poste colado, poste prefabricado)

    National Research Council Canada - National Science Library

    Villaraga Ossa, Junes Abdul; Lopera Builes, Patricia; Latorre Correa, Federico

    2012-01-01

    Introduccion: los dientes tratados endodoncicamente que van a ser rehabilitados con coronas y que han perdido parte de su estructura dental, necesitan de un poste prefabricado o colado para que ayude...

  8. 带翼型髋臼加强杯在重建髋臼肿瘤切除后骨缺损中的应用%UTILIZATION OF REINFORCED ACETABULAR CAGES WITH CAUDAL FLANGE IN RECONSTRUCTING PELVIC DEFECT AFTER ACETABULAR TUMOR RESECTION

    Institute of Scientific and Technical Information of China (English)

    李大森; 郭卫; 杨荣利; 汤小东; 曲华毅

    2011-01-01

    Objective To evaluate the surgical procedure of reinforced acetabular cage with caudal flange in reconstruction of pelvic defect after acetabular tumor resection. Methods Between June 2003 and December 2009, 25 patients with Harrington class III pelvic defect underwent reconstruction with a reinforced acetabular cage with caudal flange and total hip arthroplasty (THA). There were 13 males and 12 females with an average age of 51.2 years (range, 13-73 years). The main clinical manifestations included hip pain and buttock pain, with a median disease duration of 6 months (range, 1-96 months). Pathological findings showed 18 cases of metastasis, 3 cases of multiple myeloma, 1 case of non-Hodgkin's lymphoma, 1 case of grade I chondrosarcoma, 1 case of giant cell tumor, and 1 case of chondroblastoma. For the patient with chondroblastoma, THA with LINK RIBBED system was used. An artificial total hip system made in China was used in 6 patients and LINK SP II system was used in the other 18 patients. Results No patients died perioperatively. Deep infection and hip dislocations occurred inI and 2 patients, respectively. At last follow-up, 8 of 18 patients with metastasis died of cancer and the average survival time wasII months. The other 10 who were alive were followed up 15 months on average. One patient with multiple myeloma died of pulmonary infection at 21 months after operation and the other 2 with multiple myeloma and 1 with lymphoma were alive with an average follow-up of 17 months. The patient with grade I chondrosarcoma and patient with chondroblastoma were followed up 58 and 12 months, respectively, without recurrence. Recurrence occurred in the patient with giant cell tumor at 19 months after operation. Loosening of implant occurred in 3 patients because of local tumor recurrence. For the 23 patients at 6 months after operation, the mean Musculoskeletal Tumor Society (MSTS) 93 score was 81% (range, 57%-93%). Conclusion Reinforced acetabular cage with caudal

  9. Post-operative urinary retention.

    Science.gov (United States)

    Steggall, Martin; Treacy, Colm; Jones, Mark

    Urinary retention is a common complication of surgery and anaesthesia. The risk of post-operative urinary retention is increased following certain surgical procedures and anaesthetic modalities, and with patients' advancing age. Patients at increased risk of post-operative urinary retention should be identified before surgery or the condition should be identified and treated in a timely manner following surgery. If conservative measures do not help the patient to pass urine, the bladder will need to be drained using either an intermittent catheter or an indwelling urethral catheter, which can result in catheter-associated urinary tract infections. This article provides an overview of normal bladder function, risk factors for developing post-operative urinary retention, and treatment options. Guidance drawn from the literature aims to assist nurses in identifying at-risk patients and inform patient care.

  10. Post-heroic warfare revisited

    DEFF Research Database (Denmark)

    Frisk, Kristian

    2017-01-01

    killed during World War II (1940-1945) and the military campaign in Afghanistan (2002-2014), the paper shows that a ‘good’ military death is no longer conceived of as a patriotic sacrifice, but instead legitimised by an appeal to the unique moral worth, humanitarian goals and high professionalism...... of the fallen. The paper concludes that fatalities in transnational military interventions have invoked a sense of post-patriotic heroism instead of a post-heroic crisis, and argues that the social order of modern society has underpinned, rather than undermined, ideals of military self-sacrifice and heroism...

  11. Post-heroic warfare revisited

    DEFF Research Database (Denmark)

    Frisk, Kristian

    2016-01-01

    killed during World War II (1940-1945) and the military campaign in Afghanistan (2002-2014), the paper shows that a ‘good’ military death is no longer conceived of as a patriotic sacrifice, but instead legitimised by an appeal to the unique moral worth, humanitarian goals and high professionalism...... of the fallen. The paper concludes that fatalities in transnational military interventions have invoked a sense of post-patriotic heroism instead of a post-heroic crisis, and argues that the social order of modern society has underpinned, rather than undermined, ideals of military self-sacrifice and heroism...

  12. 'I'm Sorry' Posting

    Institute of Scientific and Technical Information of China (English)

    DING WENLEI

    2010-01-01

    @@ Having a time machine like the cute Japanese cartoon character Doraemon was once a dream shared by many Chinese born in the 1980s and 1990s. Now a message posted at Tianya forum, one of the most popular of China's online communities, provides them with a virtual version. A seemingly meaningless post in May 2008, saying "I'm going back to 1997, and I will miss you guys and will not fail you in your trust," regained popularity at the end of 2009. By December 28, it had attracted more than 1.6 million visits and nearly 19,000 replies.

  13. Credibility improves topical blog post retrieval

    NARCIS (Netherlands)

    Weerkamp, W.; de Rijke, M.

    2008-01-01

    Topical blog post retrieval is the task of ranking blog posts with respect to their relevance for a given topic. To improve topical blog post retrieval we incorporate textual credibility indicators in the retrieval process. We consider two groups of indicators: post level (determined using

  14. Credibility improves topical blog post retrieval

    NARCIS (Netherlands)

    Weerkamp, W.; de Rijke, M.

    2008-01-01

    Topical blog post retrieval is the task of ranking blog posts with respect to their relevance for a given topic. To improve topical blog post retrieval we incorporate textual credibility indicators in the retrieval process. We consider two groups of indicators: post level (determined using informati

  15. A Post-Occidental Globe?

    Science.gov (United States)

    Esen, Huseyin; Sanchez, Alejandra; Araya, Daniel; Gallaga, Drea; Kanogoiw, Fungai; Geary, James; Choe, Keecheng; Ullah, Khan Grogan; Carbajo, Lisa; Fitzpatrick, Margaret; Pour-Previti, Mercedes; Peters, Michael A.; Mukherjee, Mousumi; Britez, Rodrigo

    2012-01-01

    This is an experiment in conversation on the topic of "a post-occidental globe". It emerges from a moderated discussion group where members of a class--master's and PhD students--reflected upon a set of resources provided as part of a course in Global Studies in Education at the University of Illinois. The conversation threads were moderated and…

  16. Post Occupancy Evaluation in Scotland

    Science.gov (United States)

    Watson, Chris; Thomson, Keith

    2004-01-01

    The Scottish Executive, the devolved government for Scotland, is engaging with stakeholders to achieve excellence in the school estate through Post Occupancy Evaluation (POE). Design of the school environment has a direct impact on teaching and learning, activities which can be supported or frustrated by many building elements. Through a…

  17. Chaos Theory and Post Modernism

    Science.gov (United States)

    Snell, Joel

    2009-01-01

    Chaos theory is often associated with post modernism. However, one may make the point that both terms are misunderstood. The point of this article is to define both terms and indicate their relationship. Description: Chaos theory is associated with a definition of a theory dealing with variables (butterflies) that are not directly related to a…

  18. Reconsidering Post-Traumatic Stress

    Science.gov (United States)

    Berman, Dene S.; Davis-Berman, Jennifer

    2005-01-01

    This article serves to challenge the prevailing wisdom that suggests that most trauma is followed by post-traumatic stress disorder (PTSD), and is best treated with critical incident stress debriefing (CISD). Instead, recent evidence suggests that many individuals exposed to stress do not experience stress responses. Even those who do, however,…

  19. [Post-traumatic lung herniation

    NARCIS (Netherlands)

    WIjs, M.J. de; Verhagen, A.F.T.M.; Tan, E.C.T.H.

    2012-01-01

    BACKGROUND: Post-traumatic lung herniation due to a pathological defect in the chest wall is rare. CASE DESCRIPTION: We present a 73-year-old polytrauma patient who had extensive chest wall trauma after an accident, resulting in traumatic herniation of the lung. The patient was initially treated acc

  20. Adding semantics to microblog posts

    NARCIS (Netherlands)

    Meij, E.; Weerkamp, W.; de Rijke, M.

    2012-01-01

    Microblogs have become an important source of information for the purpose of marketing, intelligence, and reputation management. Streams of microblogs are of great value because of their direct and real-time nature. Determining what an individual microblog post is about, however, can be non-trivial

  1. Issues in post-literacy

    Science.gov (United States)

    Dave, Ravindra H.; Ouane, Adama; Sutton, Peter

    1989-12-01

    While school enrolments have been rising, the absolute number of illiterates in the world has grown too. Eradication of adult illiteracy and universalization of primary education are hindered by high drop-out in schools and relapse into illiteracy among adults. Post-literacy programmes seek to stop this reversal by ensuring retention, application and continuation of literacy skills. The Unesco Institute for Education (UIE) has been researching and promoting post-literacy strategies since 1980, but finds that most projects do not include provision for post-literacy from the outset, despite the evident need. Those programmes which have been mounted use a variety of strategies, which UIE has analysed in 12 categories. The exact delimitation of the post-literacy stage in the lifelong education continuum differs from project to project, and the emphasis on individual or societal advance depends on local perceptions of the goals of development. Examples are given of successful programmes, and the challenges of increasing participation and motivation, securing adequate funding, and making efficient and flexible use of institutional facilities are discussed.

  2. Estonianization Efforts Post-Independence

    Science.gov (United States)

    Rannut, Mart

    2008-01-01

    The purpose of this paper is to provide an overview of the sociolinguistic situation in Estonia. The paper opens with a historic overview, followed by an overview of the current demographic situation and of post-Soviet language and education policies and practices. It is argued that Estonia represents a success story in terms of language policy,…

  3. Possible Post-AGB Stars

    CERN Document Server

    Wallerstein, G; Shetrone, M D

    2003-01-01

    Radial velocities were measured for 5 potential post-AGB stars, two in the globular cluster NGC 1851 and three in the dSph galaxy Ursa Minor. All five potential PAGB stars were found to be radial velocity non-members.

  4. Post-partum psychiatric disorders

    Directory of Open Access Journals (Sweden)

    Tanvi Vijay Tuteja

    2016-08-01

    Full Text Available Post-partum period is demanding period characterized by overwhelming biological, social and emotional changes. It requires significant personal and interpersonal adaptation, especially in case of primigravida. Childbearing from the standpoint of psychological medicine is the most complex event in human experience. Traditionally Inwood has classified post-partum psychiatric disorders (PPPD as maternity blues, post-partum (postnatal depression and puerperal psychosis (PP. However the spectrum of postpartum phenomenology is widely characterized by range of emotions from transient mood liability, irritability and weepiness to marked agitation, delusions, confusion and delirium. Untreated post-partum depression can have adverse long term effects. For the mother, the episode can be the precursor of chronic recurrent depression. For her children a mother's ongoing depression can contribute to emotional, cognitive and interpersonal problems in later life. And therefore a thorough knowledge of the same is important for all obstetrician and gynecologists. [Int J Reprod Contracept Obstet Gynecol 2016; 5(8.000: 2497-2502

  5. Post Keynesianism Meets Feminist Economics

    NARCIS (Netherlands)

    I.P. van Staveren (Irene)

    2010-01-01

    textabstractThis article explores the relationships between post-Keynesian economics and feminist economics. It distinguishes three key concepts in each tradition that recommend serious attention in the other tradition: gender, the household and unpaid work and caring as key concepts in feminist

  6. Chaos Theory and Post Modernism

    Science.gov (United States)

    Snell, Joel

    2009-01-01

    Chaos theory is often associated with post modernism. However, one may make the point that both terms are misunderstood. The point of this article is to define both terms and indicate their relationship. Description: Chaos theory is associated with a definition of a theory dealing with variables (butterflies) that are not directly related to a…

  7. Post-Traumatic Stress Disorder

    Science.gov (United States)

    Post-traumatic stress disorder (PTSD) is a real illness. You can get PTSD after living through or seeing a traumatic event, such as war, a ... sexual assault, physical abuse, or a bad accident. PTSD makes you feel stressed and afraid after the ...

  8. Testing post-editing guidelines

    DEFF Research Database (Denmark)

    Flanagan, Marian; Christensen, Tina Paulsen

    2014-01-01

    There is a growing interest in machine translation (MT) and post-editing (PE). MT has been around for decades, but the use of the technology has grown significantly in the language industry in recent years, while PE is still a relatively new task. Consequently, there are currently no standard PE ...

  9. Adding semantics to microblog posts

    NARCIS (Netherlands)

    Meij, E.; Weerkamp, W.; de Rijke, M.

    2012-01-01

    Microblogs have become an important source of information for the purpose of marketing, intelligence, and reputation management. Streams of microblogs are of great value because of their direct and real-time nature. Determining what an individual microblog post is about, however, can be non-trivial

  10. Retention and failure morphology of prefabricated posts

    DEFF Research Database (Denmark)

    Sahafi, Alireza; Peutzfeldt, Anne; Asmussen, Erik;

    2004-01-01

    PURPOSE: This study evaluated the effect of cement, post material, surface treatment, and shape (1) on the retention of posts luted in the root canals of extracted human teeth and (2) on the failure morphology. MATERIALS AND METHODS: Posts of titanium alloy (ParaPost XH), glass fiber (Para......Post Fiber White), and zirconia (Cerapost) received one of several surface treatments-sandblasting, CoJet treatment, application of Metalprimer II, or sandblasting followed by silane application-and were then luted in the prepared root canal of human incisors and canines (n = 10). Following water storage...... at 37 degrees C for 7 days, retention was determined by extraction of the posts. Failure morphology of extracted posts was analyzed and quantified stereomicroscopically. RESULTS: Type of luting cement, post material, and shape of post influenced the retention and failure morphology of the posts. Because...

  11. Complex Model of Induction Heating - Demounting of Shaft Flange

    Directory of Open Access Journals (Sweden)

    Milan Krasl

    2004-01-01

    Full Text Available This paper deals with exemplary solutions of one specifies problem of induction heating. This problem was partly determined by means of numerical method as a light-coupling problem. Numerical solutions were calculated with the help of professional programs (Ansys, Fluent, QuickField. Results of the solution and comparison with measurements are discussed in conclusion.

  12. Study on local vacuum electron beam welding of flange rim

    CERN Document Server

    He Cheng Dan; Ying Lei; Xu Qi Jin

    2002-01-01

    Local vacuum electron beam welding and its application prospect in military and civil industry are introduced. A home made local vacuum electron beam welding is completed. Its main technical parameters and key techniques are also presented

  13. Modeling experiments and studies on retractable flanging device for shaftwalls

    Energy Technology Data Exchange (ETDEWEB)

    Cheng, H.; Yang, J.; Yao, Z.; Wu, W.; Lin, H.; Huang, D.; Chen, X. [Huainan Institute of Technology, Huainan (China)

    2001-12-01

    The paper presents the structural forms of two compressive joints according to the new vertical compressive shaft-boring lining, and tests have been performed on the compressive joints under vertical loading, side loading and tri-axial loading. The test results show that both structural forms of compressive joint have fine property of vertical deformation, good compression resistance and waterproofing. The result of this study has been applied to Xutuan Coal Mine in Huaibei. 3 refs., 5 figs., 8 tabs.

  14. Dynamic Analysis of Flanged Shear Wall Using Staad

    Directory of Open Access Journals (Sweden)

    Pro T. Subramani

    2014-06-01

    Full Text Available Earthquakes demonstrate vulnerability of various inadequate structures, every time they occur. The lessons taught from the aftermath of earthquakes and the research works being carried out in laboratories give better understanding about the performance of the structure and their components. Damage in reinforced concrete structures was mainly attributed to the inadequate detailing of reinforcement, lack of transverse steel and confinement of concrete in structural elements. Typical failures were brittle in nature, demonstrating inadequate capacity to dissipate and absorb inelastic energy. This necessitates a better understanding of the design and detailing of the reinforced concrete structures under various types of loading. An extensive description of previous studies on the underlying theory and the application of the finite element method to the linear and nonlinear analysis of reinforced concrete structures is presented in excellent state of-the-art reports by the American Society of Civil Engineers in 1982 [ASCE 1982]. The results from the FEA are significantly relied on the stress-strain relationship of the materials, failure criteria chosen, simulation of the crack of concrete and the interaction of the reinforcement and concrete.Because of these complexity in short- and long-term behavior of the constituent materials, the ANSYS finite element program introduces a three-dimensional element Solid65 which is capable of cracking and crushing and is then combined along with models of the interaction between the two constituents to describe the behavior of the composite reinforced concrete material. Although the Solid 65 can describe the reinforcing bars, this study uses an additional element, Link8, to investigate the stress along the reinforcement because it is inconvenient to collect the smear rebar data from Solid 65.

  15. Post-Acquisition IT Integration

    DEFF Research Database (Denmark)

    Henningsson, Stefan; Yetton, Philip

    2013-01-01

    The extant research on post-acquisition IT integration analyzes how acquirers realize IT-based value in individual acquisitions. However, serial acquirers make 60% of acquisitions. These acquisitions are not isolated events, but are components in growth-by-acquisition programs. To explain how...... serial acquirers realize IT-based value, we develop three propositions on the sequential effects on post-acquisition IT integration in acquisition programs. Their combined explanation is that serial acquirers must have a growth-by-acquisition strategy that includes the capability to improve...... IT integration capabilities, to sustain high alignment across acquisitions and to maintain a scalable IT infrastructure with a flat or decreasing cost structure. We begin the process of validating the three propositions by investigating a longitudinal case study of a growth-by-acquisition program....

  16. Post-burnout thrust measurements

    Science.gov (United States)

    McKenna, E. F.; Smith, H. T.

    1980-06-01

    Research was conducted into the problems of avoiding collision between separated payloads and spent rocket motors due to post burnout thrust, and the problem of contamination of scientific instrumentation due to outgassing of the smoldering insulation. The post burnout thrust was measured using a payload instrument module separated from an instrumented Black Brant VC Rocket in the exoatmosphere. In addition to measuring acceleration and velocities the spent motor was observed by a TV camera on board the command attitude controlled payload module. Analysis shows that the payload separated cleanly from the vehicle at a relative separation velocity of 0.69 m/sec, however the residual thrust of the spent motor overcame this differential, catching up to the payload 37 sec after separation and continuing on a parallel velocity vector at about 1.03 m/sec.

  17. Post-digital literary studies

    Directory of Open Access Journals (Sweden)

    Cramer, Florian

    2016-03-01

    Full Text Available Digital humanities and digital literary studies face much the same challenges as contemporary media art: what will become of them once their media are no longer “new”, and the limitations of processing art as data have become more clearly and widely understood? This paper revisits information aesthetics and computer poetics from the 1960s and 1970s, casting them as precursors of today’s digital humanities, with many of the same issues, achievements and failures, and with their own hype cycles of boom and bust. Conversely, “post-digital” and “Post-Internet” trends in music, graphic design and visual arts may anticipate possible futures of digital humanities and literary studies after the hype has passed.

  18. Post-Digital Literary Studies

    Directory of Open Access Journals (Sweden)

    Florian Cramer

    2016-03-01

    Full Text Available Digital humanities and digital literary studies face much the same challenges as contemporary media art: what will become of them once their media are no longer “new”, and the limitations of processing art as data have become more clearly and widely understood? This paper revisits information aesthetics and computer poetics from the 1960s and 1970s, casting them as precursors of today’s digital humanities, with many of the same issues, achievements and failures, and with their own hype cycles of boom and bust. Conversely, “post-digital” and “Post-Internet” trends in music, graphic design and visual arts may anticipate possible futures of digital humanities and literary studies after the hype has passed.

  19. Post-Lyme disease syndrome.

    Science.gov (United States)

    Ścieszka, Joanna; Dąbek, Józefa; Cieślik, Paweł

    2015-01-01

    About 10% of patients with Lyme disease continue to experience musculoskeletal pain and cognitive dysfunction after recommended antibiotic treatment. This condition is called post-Lyme disease syndrome (PLDS) or post-treatment Lyme disease syndrome. These two terms are used interchangeably. The pathogenesis of PLDS has been controversial. The hypothesis that patients with PLDS may harbor hidden reservoirs of Borrelia burgdorferi after their initial antibiotic treatment is difficult to accept. The prospective, double-blind studies contradict this point of view. Also, recently published research applying xenodiagnosis to PLDS supports the opinion that PLDS most likely has an autoimmune background. Lengthy courses of antibiotics are not justified in patients with PLDS because of the lack of benefit, and they are fraught with hazards. Most patients with PLDS recover from persistent symptoms with time. However, it can take months before they feel completely well.

  20. The ISAC post-accelerator

    Science.gov (United States)

    Laxdal, R. E.; Marchetto, M.

    2014-01-01

    The acceleration chain of the ISAC facility boosts the energy of both radioactive and stable light and heavy ions for beam delivery to both a medium energy area in ISAC-I and a high energy area in ISAC-II. The post-accelerator comprises a 35.4 MHz RFQ to accelerate beams of A/q ≤ 30 from 2 keV/u to 150 keV/u and a post stripper, 106.1 MHz variable energy drift tube linac (DTL) to accelerate ions of A/q ≤ 6 to a final energy between 0.15 MeV/u to 1.5 MeV/u. A 40 MV superconducting linac further accelerates beam from 1.5 MeV/u to energies above the Coulomb barrier. All linacs operate cw to preserve beam intensity.

  1. Post-orthodontic occlusal function.

    Science.gov (United States)

    Smith, A; Freer, T J

    1989-08-01

    The significance of orthodontic treatment in the aetiology of temporomandibular dysfunction continues to be a matter of controversy. However, the evidence of any association has been generally negative. This investigation involved the examination of a study group of 87 post-orthodontic patients, the average time out of all retention being 52 months. They were compared with an untreated control group. Signs and symptoms of temporomandibular disfunction were assessed for both groups. In only one instance, soft joint click, was there found to be a significant association between the treatment category and the occurrence of the symptom, there being a higher rate of soft clicks in the post-treatment group. While this may be ascribed to orthodontic treatment, there was also a different restorative pattern in the two groups. No other significant associations were found.

  2. Post-Industrial Cultural Criticism

    DEFF Research Database (Denmark)

    Kammer, Aske

    2015-01-01

    Integrating perspectives from research into cultural and post-industrial journalism, this article presents a pilot study of websites with reviews of arts and culture conducted by amateurs. Such websites constitute a popular space for cultural criticism, and one that challenges traditional...... reviewers have highly specialized knowledge of culture and, on that basis, argues that the emergence of this type of critic might represent a qualitative strengthening of cultural criticism....

  3. (Post)constructivism on Technoscience

    OpenAIRE

    2013-01-01

    Zmodyfikowane tłumaczenie tekstu (Post)konstruktywizm na temat technonauki, „Zagadnienia Naukoznawstwa”, 2010, nr 2, 231-251, przeł. Monika Włudzik. The main aims of the article are as follows: (1) to indicate that cognition (in particular the conditions of effectiveness in laboratory practices) may be satisfactorily modelled from a (properly determined) constructivist perspective; (2) to reconstruct the latest tendencies within science and technology studies encapsulated in th...

  4. Actinomycosis - Left Post Chest Wall

    Directory of Open Access Journals (Sweden)

    Kafil Akhtar, M. Naim, S. Shamshad Ahmad, Nazoora Khan, Uroos Abedi, A.H. Khan*

    2008-01-01

    Full Text Available A forty year old female of weak body built presented with recurring small hard lumps in let posteriorchest wall for 3 years and discharging ulcers for 3 months duration. Clinically, the provisional diagnosiswas malignancy with secondary infection. FNAC showed features suggestive of dysplasia buthistopathology confirmed the diagnosis as actinomycosis. The present case is reported due to rare incidenceof actinomycosis at post chest wall with muscle involvement.

  5. Post-dural puncture headache

    Directory of Open Access Journals (Sweden)

    Ghaleb A

    2012-01-01

    Full Text Available Ahmed Ghaleb1, Arjang Khorasani2, Devanand Mangar31Department of Anesthesiology, University of Arkansas for Medical Sciences, Little Rock, AR, 2Anesthesiology Residency Program, Advocate Illinois Masonic Medical Center, Chicago, IL, 3Florida Gulf to Bay Anesthesiology, Tampa General Hospital, Tampa, FL, USAAbstract: Since August Bier reported the first case in 1898, post-dural puncture headache (PDPH has been a problem for patients following dural puncture. Clinical and laboratory research over the last 30 years has shown that use of smaller-gauge needles, particularly of the pencil-point design, are associated with a lower risk of PDPH than traditional cutting point needle tips (Quincke-point needle. A careful history can rule out other causes of headache. A postural component of headache is the sine qua non of PDPH. In high-risk patients < 50 years, post-partum, in the event a large-gauge needle puncture is initiated, an epidural blood patch should be performed within 24–48 hours of dural puncture. The optimum volume of blood has been shown to be 12–20 mL for adult patients. Complications caused by autologous epidural blood patching (AEBP are rare.Keywords: post-dural puncture headache, gauge, needles, cause, risk, incidence

  6. Post-stenotic aortic dilatation

    Directory of Open Access Journals (Sweden)

    Jahangiri Marjan

    2006-03-01

    Full Text Available Abstract Aortic stenosis is the most common valvular heart disease affecting up to 4% of the elderly population. It can be associated with dilatation of the ascending aorta and subsequent dissection. Post-stenotic dilatation is seen in patients with AS and/or aortic regurgitation, patients with a haemodynamically normal bicuspid aortic valve and following aortic valve replacement. Controversy exists as to whether to replace the aortic root and ascending aorta at the time of aortic valve replacement, an operation that potentially carries a higher morbidity and mortality. The aetiology of post-stenotic aortic dilatation remains controversial. It may be due to haemodynamic factors caused by a stenotic valve, involving high velocity and turbulent flow downstream of the stenosis, or due to intrinsic pathology of the aortic wall. This may involve an abnormality in the process of extracellular matrix remodelling in the aortic wall including inadequate synthesis, degradation and transport of extracellular matrix proteins. This article reviews the aetiology, pathology and management of patients with post-stenotic aortic dilatation.

  7. Effective Assessment Framework: Sustainability of Post Amnesty ...

    African Journals Online (AJOL)

    Effective Assessment Framework: Sustainability of Post Amnesty Programme in ... Post Amnesty programme beyond Amnesty peace agreement in Niger Delta. ... leaf from other countries. management techniques such as in Canada and USA.

  8. 10 CFR 160.6 - Posting.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 2 2010-01-01 2010-01-01 false Posting. 160.6 Section 160.6 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) TRESPASSING ON COMMISSION PROPERTY § 160.6 Posting. Notices stating the pertinent prohibitions of §§ 160.3 and 160.4 and penalties of § 160.5 will be conspicuously posted at all entrances...

  9. 10 CFR 73.75 - Posting.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 2 2010-01-01 2010-01-01 false Posting. 73.75 Section 73.75 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) PHYSICAL PROTECTION OF PLANTS AND MATERIALS Records and Reports § 73.75 Posting. (a... criminal penalties, and associated posting requirements, under section 229 of the Atomic Energy Act...

  10. 36 CFR 261.51 - Posting.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 2 2010-07-01 2010-07-01 false Posting. 261.51 Section 261.51 Parks, Forests, and Public Property FOREST SERVICE, DEPARTMENT OF AGRICULTURE PROHIBITIONS Prohibitions in Areas Designated by Order § 261.51 Posting. Posting is accomplished by: (a) Placing a copy...

  11. 36 CFR 71.4 - Posting.

    Science.gov (United States)

    2010-07-01

    ... 36 Parks, Forests, and Public Property 1 2010-07-01 2010-07-01 false Posting. 71.4 Section 71.4... § 71.4 Posting. (a) The administering bureaus of the Department of the Interior shall provide for the posting of the following designation sign at entrances to Designated Entrance Fee Areas and at...

  12. Clinical issues in post-abortion care.

    Science.gov (United States)

    Cappiello, Joyce D; Beal, Margaret W; Simmonds, Katherine E

    2011-05-01

    This article provides an overview of the clinical issues in post-abortion care, including types of abortion procedures, expected post-abortion course, possible complications, and the components of the post-abortion visit. By providing follow-up care to their patients, NPs can increase continuity of care and promote successful contraceptive use.

  13. Parameterized post-Newtonian cosmology

    Science.gov (United States)

    Sanghai, Viraj A. A.; Clifton, Timothy

    2017-03-01

    Einstein’s theory of gravity has been extensively tested on solar system scales, and for isolated astrophysical systems, using the perturbative framework known as the parameterized post-Newtonian (PPN) formalism. This framework is designed for use in the weak-field and slow-motion limit of gravity, and can be used to constrain a large class of metric theories of gravity with data collected from the aforementioned systems. Given the potential of future surveys to probe cosmological scales to high precision, it is a topic of much contemporary interest to construct a similar framework to link Einstein’s theory of gravity and its alternatives to observations on cosmological scales. Our approach to this problem is to adapt and extend the existing PPN formalism for use in cosmology. We derive a set of equations that use the same parameters to consistently model both weak fields and cosmology. This allows us to parameterize a large class of modified theories of gravity and dark energy models on cosmological scales, using just four functions of time. These four functions can be directly linked to the background expansion of the universe, first-order cosmological perturbations, and the weak-field limit of the theory. They also reduce to the standard PPN parameters on solar system scales. We illustrate how dark energy models and scalar-tensor and vector-tensor theories of gravity fit into this framework, which we refer to as ‘parameterized post-Newtonian cosmology’ (PPNC).

  14. [Post-Lyme disease syndrome].

    Science.gov (United States)

    Błaut-Jurkowska, Justyna; Jurkowski, Marcin

    2016-02-01

    Lyme disease is a chronic infectious disease caused by the bacteria, spirochete of the Borrelia type. Skin, nervous system, musculoskeletal system and heart may be involved in the course of the disease. The prognosis for properly treated Lyme disease is usually good. However, in about 5% of patients so called Post-Lyme disease syndrome (PLSD) develops. It is defined as a syndrome of subjective symptoms persisting despite proper treatment of Borrelia burgdorferi infection. The most common symptoms include: fatigue, muscle and joint pain, and problems with memory and concentration. Pathogenesis of PLDS remains unknown. The differential diagnosis should include neurological, rheumatic and mental diseases. Till now there is no causative treatment of PLDS. In relieving symptom rehabilitation, painkillers, anti-inflammatory and antidepressants medicines are recommended. Emotional and psychological supports are also necessary. Non-specific symptoms reported by patients with post- Lyme disease syndrome raise the suspicion of other pathologies. This can lead to misdiagnosis and implementation of unnecessary, potentially harmful to the patient's therapy. An increase in tick-borne diseases needs to increase physicians awareness of these issues. © 2016 MEDPRESS.

  15. Post-Newtonian cosmological models

    CERN Document Server

    Sanghai, Viraj A A

    2015-01-01

    We construct a framework to probe the effect of non-linear structure formation on the large-scale expansion of the universe. We take a bottom-up approach to cosmological modelling by splitting our universe into cells. The matter content within each cell is described by the post-Newtonian formalism. We assume that most of the cell is in the vicinity of weak gravitational fields, so that it can be described using a perturbed Minkowski metric. Our cells are patched together using the Israel junction conditions. We impose reflection symmetry across the boundary of these cells. This allows us to calculate the equation of motion for the boundary of the cell and, hence, the expansion rate of the universe. At Newtonian order, we recover the standard Friedmann-like equations. At post-Newtonian orders, we obtain a correction to the large-scale expansion of the universe. Our framework does not depend on the process of averaging in cosmology. As an example, we use this framework to investigate the cosmological evolution ...

  16. CERN at the Post Office

    CERN Multimedia

    2006-01-01

    In collaboration with CERN and the Conseil général de l'Ain, the French postal services of the Pays de Gex have released a new set of pre-paid envelopes paying tribute to CERN. The envelopes, which come in packets of ten, each featuring a different aspect of CERN, will be on sale from 6 June onwards. They will be available from five post offices in the Pays de Gex (Ferney-Voltaire, Prévessin-Moëns, Saint-Genis-Pouilly, Thoiry and CERN-Prévessin), as well as from the CERN Shop (Reception, Building 33). The envelopes were unveiled at an official ceremony on 23 May, which was attended by Jocelyne Boch, Vice-President of the Conseil général de l'Ain and Mayoress of Thoiry, as well as Marina Combe, Head of the Saint-Genis-Pouilly, Thoiry and CERN-Prévessin post offices, and Maximilian Metzger, CERN's Secretary-General. The last set of envelopes to feature CERN, which commemorated the Laboratory's 50th anniversary in 2004, were a huge success, with sales totalling 35 000 in less than a year. 'We received...

  17. Post-representational cartography Cartografia post-rappresentativa

    Directory of Open Access Journals (Sweden)

    Rob Kitchin

    2010-03-01

    Full Text Available Over the past decade there has been a move amongst critical cartographers to rethink maps from a post-representational perspective – that is, a vantage point that does not privilege representational modes of thinking (wherein maps are assumed to be mirrors of the world and automatically presumes the ontological security of a map as a map, but rather rethinks and destabilises such notions. This new theorisation extends beyond the earlier critiques of Brian Harley (1989 that argued maps were social constructions. For Harley a map still conveyed the truth of a landscape, albeit its message was bound within the ideological frame of its creator. He thus advocated a strategy of identifying the politics of representation within maps in order to circumnavigate them (to reveal the truth lurking underneath, with the ontology of cartographic practice remaining unquestioned.

  18. Retention and failure morphology of prefabricated posts

    DEFF Research Database (Denmark)

    Sahafi, Alireza; Peutzfeldt, Anne; Asmussen, Erik

    2004-01-01

    PURPOSE: This study evaluated the effect of cement, post material, surface treatment, and shape (1) on the retention of posts luted in the root canals of extracted human teeth and (2) on the failure morphology. MATERIALS AND METHODS: Posts of titanium alloy (ParaPost XH), glass fiber (Para......Post Fiber White), and zirconia (Cerapost) received one of several surface treatments-sandblasting, CoJet treatment, application of Metalprimer II, or sandblasting followed by silane application-and were then luted in the prepared root canal of human incisors and canines (n = 10). Following water storage...

  19. Post-Secularism, Religious Knowledge and Religious Education

    Science.gov (United States)

    Carr, David

    2012-01-01

    Post-secularism seems to follow in the wake of other (what are here called) "postal" perspectives--post-structuralism, postmodernism, post-empiricism, post-positivism, post-analytical philosophy, post-foundationalism and so on--in questioning or repudiating what it takes to be the epistemic assumptions of "modernism." To be sure, post-secularism…

  20. Post-Secularism, Religious Knowledge and Religious Education

    Science.gov (United States)

    Carr, David

    2012-01-01

    Post-secularism seems to follow in the wake of other (what are here called) "postal" perspectives--post-structuralism, postmodernism, post-empiricism, post-positivism, post-analytical philosophy, post-foundationalism and so on--in questioning or repudiating what it takes to be the epistemic assumptions of "modernism." To be sure, post-secularism…

  1. "Deprovincializing" sociology: the post colonial contribution

    Directory of Open Access Journals (Sweden)

    Sérgio Costa

    2007-01-01

    Full Text Available This essay discusses the contributions of post-colonial studies for renewing the contemporary social theory. At first it considers the character of the critique addressed by post-colonial studies to social sciences. After that, it analyses the post-colonial epistemological alternatives, considering three interrelated concepts: entangled modernity, "hybrid" site of enunciation, and decentralized subject. The conclusion is that, in spite of its severity and suspicion among some authors that post-colonial theory can destroy epistemological foundations of social sciences, an important part of post-colonial critique is rather addressed to the theory of modernization. Here, post-colonial positions present affinities with objections, which have already been presented by "conventional" social scientists. Other aspects raised by post-colonial authors do not destabilize, necessarily, social sciences; they can even enrich them.

  2. Study on Propagation Characteristics of UHF Signal via Hole of GIS Mental Flange and Development of External Radiating Antenna%GIS金属法兰孔特高频信号传播特性研究与外置式发射天线开发

    Institute of Scientific and Technical Information of China (English)

    卢启付; 郑书生; 李兴旺; 王亮; 唐志国; 詹花茂

    2013-01-01

      在未安装内置式特高频(ultra-high-frequency,UHF)传感器的情况下,如何向气体绝缘金属封闭开关设备(gas-insulated metal-enclosed switchgear,GIS)内部注入UHF 电磁波标定信号是目前开展GIS局部放电UHF在线监测系统灵敏度现场校验时面临的关键问题之一。提出了 GIS 外置式UHF电磁波发射方法,即通过盆式绝缘子金属法兰小孔注入标定信号。通过仿真和理论分析研究了UHF电磁波经过小孔时的传播模式和电场结构,通过加脊降低了矩形波导天线的下限截止频率,研制了双脊波导发射天线,在GIS设备上检验了该发射方法及装置的应用效果。研究表明, UHF电磁波以TE10波型为主模经过小孔传播,双脊波导天线的下限截止频率降到了300 MHz,通过它能够向GIS 内部发射300 MHz∼1.5 GHz的UHF标定信号。GIS体外式UHF标定信号注入方法可以为GIS局部放电UHF检测仪器现场灵敏度校验提供标定信号源。%At present, how to inject UHF electromagnetic wave calibration signal into gas-insulated metal-enclosed switchgear (GIS), in which the built-in ultra-high-frequency (UHF) sensor is not installed, is one of the key problems to be faced with during the field sensitivity calibration of online UHF monitoring system for partial discharge in GIS. An external UHF electromagnetic wave transmitting method for GIS, i.e., the calibration signal is injected via hole on metal flange of disc insulator, is proposed. The propagation mode and the structure of electric field of UHF electromagnetic wave passing through the hole is researched by simulation and theoretical analysis;the lower-cut-off frequency of rectangular waveguide antenna is decreased by adding double ridge and the transmitting antenna with double ridge waveguide is developed, and the application effect of the proposed transmitting method and device are validated on GIS. Research results show that the TE10 wave

  3. Management Of Post Stroke Seizures

    Directory of Open Access Journals (Sweden)

    Kavian Ghandehari

    2017-02-01

    Full Text Available The incidence of seizures in relation to stroke is 8.9%, with a frequency of 10.6 and 8.6% in haemorrhagic and ischaemic stroke, respectively. In subarachnoid haemorrhage the incidence is 8.5%. Due to the fact that infarcts are significantly more frequent than haemorrhages, seizures are mainly related to occlusive vascular disease of the brain. The general view is to consider stroke-related seizures as harmless complications in the course of a prolonged vascular disease involving the heart and brain. Seizures can be classified as those of early and those of late onset in a paradigm comparable to post-traumatic epilepsy, with an arbitrary dividing point of two weeks after the event. Most early-onset seizures occur during the first day after the stroke. Late-onset seizures occur three times more often than early-onset ones. A first late-onset epileptic event is most likely to take place between six months and two years after the stroke. However, up to 28% of patients develop their first seizure several years later. Simple partial seizures, with or without secondary generalisation, account for about 50% of total seizures, while complex partial spells, with or without secondary generalisation, and primary generalised tonic–clonic insults account for approximately 25% each. Status epilepticus occurs in 12% of stroke patients, but the recurrence rate after an initial status epilepticus is not higher than after a single seizure. Inhibitory seizures, mimicking transient ischaemic attacks, are observed in 7.1% of cases. The only clinical predictor of late-onset seizures is the initial presentation of partial anterior circulation syndrome due to a territorial infarct. Patients with total anterior circulation syndrome have less chance of developing epileptic spells, not only due to their shorter life expectancy but also due to the fact that the large infarcts are sharply demarcated in these patients. The optimal timing and type of antiepileptic drug

  4. [Post-tubal ligation syndrome].

    Science.gov (United States)

    Satoh, K; Osada, H

    1993-01-01

    Post-tubal ligation syndrome includes pain during intercourse, aching lower back, premenstrual tension syndrome, difficulty in menstruating, uterine hemorrhage, and absence of menstruation. The syndrome is caused by blood circulation problems in and around the Fallopian tubes and ovaries, pressure on nerves, and intrapelvic adhesion. Differentiating between this syndrome and endometritis during diagnosis and differentiating between functional hemorrhage due to hormonal abnormality and anatomical hemorrhage due to polyp or tumor is very important. Since the symptoms of this syndrome are mild, simple symptomatic treatment is sufficient in most cases. In some cases, however, desquamation surgery or reversal of tubal ligation may be necessary. Endoscopic surgery is also available. In Japan, because of widespread use of condoms and IUDs, tubal ligation is not very common.

  5. Post-piledriver concept letter

    Energy Technology Data Exchange (ETDEWEB)

    Werth, G. C.

    1967-07-01

    This is the concept for a series of post-shot investigations at the Piledriver site, Area 15, Nevada Test Site (NTS), to gain information on: Chimney geometry and associated wall rock conditions resulting from a deeply buried (1500-ft) nuclear explosion in granite; The characteristics and distribution of rubble and radioactivity in the chimney; and Data pertinent to in-situ leaching. These categories define the three phases of this proposal in chronological order. The technical programs under Phases II and III will depend on the results of Phase 1. Presently, it is not known whether or not there has been a collapse of the Piledriver cavity. If collapse occurred, the predicted dimensions of the chimney, based on Hardhat experience, are expected to be 250 ft in diameter and 560 ft high. For the purpose of this discussion, it is assumed this condition exists.

  6. Post-CTS Delay Insertion

    Directory of Open Access Journals (Sweden)

    Jianchao Lu

    2010-01-01

    clock skew operation is performed only at the clock sinks in order to preserve the structure and the optimizations implemented in the clock tree synthesis stage. The methodology is implemented as a linear programming model amenable to two design objectives: fixing timing violations or optimizing the clock period. Experimental results show that the clock networks of the largest ISCAS'89 circuits can be corrected post-CTS to resolve the timing conflicts in approximately 90% of the circuits with minimal delay insertion (0.159  ×  clock period per clock path on average. It is also shown that the majority of the clock period improvement achievable through unrestricted clock skew scheduling are obtained through very limited insertion (≈43% average improvement through 10% of max insertion.

  7. Post-therapeutic imaging findings

    Energy Technology Data Exchange (ETDEWEB)

    Pollice, Saverio, E-mail: saveriopollice@hotmail.it [Department of Radiology and Neuroradiology, “L. Bonomo Hospital”, 76123 Andria, BT (Italy); Muto, Mario, E-mail: mutomar@tiscali.it [Department of Neuroradiology, “Cardarelli Hospital”, Naples (Italy); Scarabino, Tommaso, E-mail: tscarabino@hotmail.com [Department of Radiology and Neuroradiology, “L. Bonomo Hospital”, 76123 Andria, BT (Italy)

    2015-05-15

    Highlights: • This study is the result of collaboration between neuroradiologists and neurosurgeons. • Comparison between neuroimaging techniques to better evaluate the complications after treatment of the spin. • Evaluation of the imaging features of complications and definition of follow-up. - Abstract: Any surgical approach modifies the normal anatomical and functional arrangement of the segmental spine which is aimed, therefore image interpretation cannot ignore a correct set of knowledge in the field of anatomy, pathophysiology, drug compliance, interventional radiology and surgery. Neuroradiological imaging has an important role before surgery to direct the surgeon or interventional radiologist during the operation, both in post-surgery, where imaging examination can rightly evaluate properties and effects of the treatment and can detect potential complications as infections, abscess, bleeding, exuberant scar, mobilization and rupture of devices. The available methods of imaging are the X-rays (XR) made at least in two projections, Computed Tomography (CT) with MPR (multiplanar) and VR (volume rendering) reconstruction, and Magnetic Resonance (MR), often performed before and after contrast media injection. Imaging assessment of spine after surgery is complex and depends upon several factors, including surgical procedures and disease for which it was performed; biomechanical of the underlying cortical and cancellous bone findings; conditions of muscles, intervertebral disk and ligaments; time since surgery procedures; duration and nature of the post-surgical syndrome. Depending upon several factors, one or a combination of complementary imaging modalities (X-rays, Computed Tomography, Magnetic Resonance) may be required to evaluate effectiveness of the treatment; to demonstrate any clinically relevant abnormality at the treated region and adjacent structures (complications such as inflammation, abscesses, bleeding and misplacement of the device); to

  8. Post-therapeutic imaging findings.

    Science.gov (United States)

    Pollice, Saverio; Muto, Mario; Scarabino, Tommaso

    2015-05-01

    Any surgical approach modifies the normal anatomical and functional arrangement of the segmental spine which is aimed, therefore image interpretation cannot ignore a correct set of knowledge in the field of anatomy, pathophysiology, drug compliance, interventional radiology and surgery. Neuroradiological imaging has an important role before surgery to direct the surgeon or interventional radiologist during the operation, both in post-surgery, where imaging examination can rightly evaluate properties and effects of the treatment and can detect potential complications as infections, abscess, bleeding, exuberant scar, mobilization and rupture of devices. The available methods of imaging are the X-rays (XR) made at least in two projections, Computed Tomography (CT) with MPR (multiplanar) and VR (volume rendering) reconstruction, and Magnetic Resonance (MR), often performed before and after contrast media injection. Imaging assessment of spine after surgery is complex and depends upon several factors, including surgical procedures and disease for which it was performed; biomechanical of the underlying cortical and cancellous bone findings; conditions of muscles, intervertebral disk and ligaments; time since surgery procedures; duration and nature of the post-surgical syndrome. Depending upon several factors, one or a combination of complementary imaging modalities (X-rays, Computed Tomography, Magnetic Resonance) may be required to evaluate effectiveness of the treatment; to demonstrate any clinically relevant abnormality at the treated region and adjacent structures (complications such as inflammation, abscesses, bleeding and misplacement of the device); to assist the interventional radiologist or surgeon in deciding if is necessary intervene again, in which nature and in which vertebral level(s).

  9. Successful Pregnancies Post Renal Transplantation

    Directory of Open Access Journals (Sweden)

    Alfi Adnan

    2008-01-01

    Full Text Available To evaluate the maternal and fetal outcomes in renal transplant female recipients who became pregnant from 1989 to 2005 in our center, we retrospectively studied 20 incident pregnancies in 12 renal transplant recipients; 5 (41.7 % of them from living related, 4 (33.3% from deceased, and 3 (25% from living unrelated donors. The mean age at pregnancy was 30.5 ± 4.5 years and mean interval from transplantation to pregnancy was 21 ± 5.7 months with the interval was < 1 year in one patient. The mean serum creatinine (SCr before pregnancy vs 6 months post delivery was 110 ± 24.3, and 156 ± 190 µmol/ L, respectively, (p = 0.2. All patients were normotensive during the prenatal period except two who were hypertensive, none was markedly proteinuric, and only one acute rejection episode occurred during one pregnancy. Graft loss one year post delivery occurred in 2 patients; one with elevated prenatal SCr > 132 µmol/L, and another with short interval from transplantation to pregnancy < 1 year, while the remaining 10 patients revealed current mean SCr of 105 ± 18.2 µmol/L. Complications during pregnancy inclu-ded pre-eclampsia in (25%, UTI (25%, preterm delivery < 37 weeks (30%, however, none of the pregnancies ended by abortion. Normal vaginal delivery vs cesarean section was 70% vs 30%, respectively. Gestational age at delivery was 36.3 ± 3.9 weeks, and mean fetal birth weight was 2349 ± 574 gm. Apgar score was 9-10 in all of the 20 babies, and none revealed intrauterine growth retardation or congenital anomalies. We conclude that consecutive pregnancies demons-trate long-term maternal and fetal survival and function. The major risk factors are elevated starting serum creatinine, hypertension, and short time interval from transplantation to pregnancy.

  10. Gynecologic Malignancies Post-LeFort Colpocleisis

    Directory of Open Access Journals (Sweden)

    Rayan Elkattah

    2014-01-01

    Full Text Available Introduction. LeFort colpocleisis (LFC is a safe and effective obliterative surgical option for older women with advanced pelvic organ prolapse who no longer desire coital activity. A major disadvantage is the limited ability to evaluate for post-LFC gynecologic malignancies. Methods. We present the first case of endometrioid ovarian cancer diagnosed after LFC and review all reported gynecologic malignancies post-LFC in the English medical literature. Results. This is the second reported ovarian cancer post-LFC and the first of the endometrioid subtype. A total of nine other gynecologic malignancies post-LFC have been reported in the English medical literature. Conclusions. Gynecologic malignancies post-LFC are rare. We propose a simple 3-step strategy in evaluating post-LFC malignancies.

  11. Elasticidad por flexión: una experiencia de laboratorio adaptable a los distintos niveles educativos

    OpenAIRE

    Beléndez Vázquez, Tarsicio; Neipp López, Cristian; Beléndez Vázquez, Augusto

    2002-01-01

    El estudio de distintos aspectos del comportamiento mecánico de los materiales se lleva a cabo en asignaturas como Física, Mecánica, Ciencia de los Materiales o Resistencia de Materiales en distintos niveles educativos, tanto en el bachillerato como en la universidad. En este trabajo se presenta una experiencia de laboratorio que puede llevarse a cabo utilizando un material muy simple y de bajo coste, que permite estudiar -mediante medidas muy sencillas, básicamente longitudes y masas- la fle...

  12. Development of Planter Foot Pressure Distribution System Using Flexi Force Sensors

    Directory of Open Access Journals (Sweden)

    S. L. Patil

    2009-09-01

    Full Text Available Diabetes brings with it neurovascular complications, which results in development of high pressure areas. Patients with diabetic polyneuropathy often lose pain and temperature sensations in their feet, resulting in inadequate information about pressure under the feet, during walking or standing. This may cause injury in the feet; at times accidentally, painless trauma develops and results in ulceration. Repetitive injury may also produce bone changes, causing the foot to become deformed. It is thus very important to locate such areas using pressure distribution measurement system. A detailed study of the pressure distribution on the sole of the foot in static position is carried out. In this paper the low cost planter foot pressure system is developed to measure foot pressures in normal subjects and diabetic patients. These pressure profiles i.e. pressure concentrations can assist in writing proper orthotic prescriptions. Pressure profile of 37 diabetic and 33 normal subjects is analyzed. The initial results indicate pressures in range of 50 to 400 KPa for normal subject, higher pressures i.e. above 600 KPa at metatarsal heads for diabetic patients.

  13. FlexyDos3D: a deformable anthropomorphic 3D radiation dosimeter: radiation properties

    DEFF Research Database (Denmark)

    De Deene, Yves; Skyt, Peter Sandegaard; Hill, Robin

    2015-01-01

    Three dimensional radiation dosimetry has received growing interest with the implementation of highly conformal radiotherapy treatments. The radiotherapy community faces new challenges with the commissioning of image guided and image gated radiotherapy treatments (IGRT) and deformable image...... and oxygen concentration has also been investigated. The radiophysical properties of this new dosimeter are discussed including stability, spatial integrity, temperature dependence of the dosimeter during radiation, readout and storage, dose rate dependence and tissue equivalence....

  14. 10 CFR 860.6 - Posting.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false Posting. 860.6 Section 860.6 Energy DEPARTMENT OF ENERGY TRESPASSING ON DEPARTMENT OF ENERGY PROPERTY § 860.6 Posting. Notices stating the pertinent prohibitions of §§ 860.3 and 860.4 and penalties of § 860.5 will be conspicuously posted at all entrances of...

  15. Image Post-Processing in Dental Practice

    OpenAIRE

    Gormez, Ozlem; Yilmaz, Hasan Huseyin

    2009-01-01

    Image post-processing of dental digital radiographs, a function which used commonly in dental practice is presented in this article. Digital radiography has been available in dentistry for more than 25 years and its use by dental practitioners is steadily increasing. Digital acquisition of radiographs enables computer-based image post-processing to enhance image quality and increase the accuracy of interpretation. Image post-processing applications can easily be practiced in dental office by ...

  16. A post-processor for Gurmukhi OCR

    Indian Academy of Sciences (India)

    G S Lehal; Chandan Singh

    2002-02-01

    A post-processing system for OCR of Gurmukhi script has been developed. Statistical information of Punjabi language syllable combinations, corpora look-up and certain heuristics based on Punjabi grammar rules have been combined to design the post-processor. An improvement of 3% in recognition rate, from 94.35% to 97.34%, has been reported on clean images using the post-processing techniques.

  17. Development of new radiopaque glass fiber posts

    Energy Technology Data Exchange (ETDEWEB)

    Furtos, Gabriel, E-mail: gfurtos@yahoo.co.uk [Raluca Ripan Institute of Research in Chemistry, Babes-Bolyai University, Cluj-Napoca (Romania); Baldea, Bogdan [Dep. of Prosthodontics, Faculty of Dental Medicine, Timisoara (Romania); Silaghi-Dumitrescu, Laura [Raluca Ripan Institute of Research in Chemistry, Babes-Bolyai University, Cluj-Napoca (Romania)

    2016-02-01

    The aim of this study was to analyze the radiopacity and filler content of three experimental glass fiber posts (EGFP) in comparison with other glass/carbon fibers and metal posts from the dental market. Three EGFP were obtained by pultrusion of glass fibers in a polymer matrix based on 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy)-phenyl]propane (bis-GMA) and triethyleneglycol dimethacrylate (TEGDMA) monomers. Using intraoral sensor disks 27 posts, as well as mesiodistal sections of human molar and aluminum step wedges were radiographed for evaluation of radiopacity. The percentage compositions of fillers by weight and volume were investigated by combustion analysis. Two EGFP showed radiopacity higher than enamel. The commercial endodontic posts showed radiopacity as follows: higher than enamel, between enamel and dentin, and lower than dentin. The results showed statistically significant differences (p < 0.05) when evaluated with one-way ANOVA statistical analysis. According to combustion analyses, the filler content of the tested posts ranges between 58.84 wt.% and 86.02 wt.%. The filler content of the tested EGFP ranged between 68.91 wt.% and 79.04 wt.%. EGFP could be an alternative to commercial glass fiber posts. Future glass fiber posts are recommended to present higher radiopacity than dentin and perhaps ideally similar to or higher than that of enamel, for improved clinical detection. The posts with a lower radiopacity than dentin should be considered insufficiently radiopaque. The radiopacity of some glass fiber posts is not greatly influenced by the amount of filler. - Highlights: • AR glass fibers for dental applications • AR glass fibers have a great potential for obtaining radiopaque glass fiber posts. • Experimental AR glass fiber posts could be an alternative to commercial glass fiber posts for clinical application.

  18. Development Assistance for Education Post-2015

    OpenAIRE

    Kenneth King; Robert Palmer

    2014-01-01

    This paper examines the implications of the post-2015 education agenda from an aid perspective. It does so by analysing how Western European and North American countries have been referred to in the main strands of the post-2015 literature relating to education; how current priorities in the post-2015 education proposals might affect future development aid; how the donors have responded to Education for All (EFA) and the education-related Millennium Development Goals (MDGs) since 2000; how...

  19. Postpartum Post-Traumatic Stress Disorder

    Science.gov (United States)

    ... Depression During Pregnancy & Postpartum Anxiety During Pregnancy & Postpartum Pregnancy or Postpartum Obsessive Symptoms Postpartum Post-Traumatic Stress Disorder Bipolar Mood Disorders Postpartum Psychosis Social Support ...

  20. Post Implementation Review Framework and Procedures

    Data.gov (United States)

    Social Security Administration — This template outlines the Social Security Administration's (SSA) approach to initiating, conducting, and completing Post Implementation Reviews (PIRs). The template...

  1. MRO DKF Post-Processing Tool

    Science.gov (United States)

    Ayap, Shanti; Fisher, Forest; Gladden, Roy; Khanampompan, Teerapat

    2008-01-01

    This software tool saves time and reduces risk by automating two labor-intensive and error-prone post-processing steps required for every DKF [DSN (Deep Space Network) Keyword File] that MRO (Mars Reconnaissance Orbiter) produces, and is being extended to post-process the corresponding TSOE (Text Sequence Of Events) as well. The need for this post-processing step stems from limitations in the seq-gen modeling resulting in incorrect DKF generation that is then cleaned up in post-processing.

  2. A Review of Post and Core Application with Emphasize on Non Metallic Posts

    Directory of Open Access Journals (Sweden)

    Shahroodi MH

    2001-05-01

    Full Text Available Many different methods are suggested to restore endodontically treated teeth. Prefabricated posts can not be indicated for all teeth and cast posts require extra time and cost. In addition, with the introduction of full ceramic restorations, achieving the ideal esthetic with metal post underneath them may be problematic or impossible because the darkness of the metallic posts may show through the highly translucent all ceramic restorations. In this article the review of litature and describiton of applied methods of different procedure in restoring the root canal therapied teeth and few techniques of non metallic posts fabrication such as fiber reinforced composite and zirconium oxide posts have been described.

  3. Post Pelvic Radiotherapy Bony Changes

    Energy Technology Data Exchange (ETDEWEB)

    Huh, Seung Jae [Samsung Medical Center, Seoul (Korea, Republic of)

    2009-03-15

    There has been recent interest in radiation-induced bone injury in clinical conditions, especially for pelvic insufficiency fracture (PIF). A PIF is caused by the effect of normal or physiological stress on bone with demineralization and decreased elastic resistance. Pelvic radiotherapy (RT) can also contribute to the development of a PIF. A PIF has been regarded as a rare complication with the use of megavoltage equipment. However, recent studies have reported the incidence of PIFs as 8.2{approx}20% after pelvic RT in gynecological patients, an incidence that was higher than previously believed. The importance of understanding a PIF lies in the potential for misdiagnosis as a bony metastasis. If patients complain of pelvic pain after whole-pelvis radiation therapy, the presence of a PIF must be considered in the differential diagnosis. The use of multibeam arrangements and conformal RT to reduce the volume and dose of irradiated pelvic bone can be helpful to minimize the risk of fracture. In addition to a PIF, osteonecrosis and avascular necrosis of the femoral head can develop after radiation therapy. Osteoradionecrosis of the pelvic bone is a clinical diagnostic challenge that must be differentiated from an osseous metastasis. A post-radiation bone sarcoma can result as a long-term sequela of pelvic irradiation for uterine cervical cancer.

  4. Post orgasmic illness syndrome (POIS)

    Science.gov (United States)

    2016-01-01

    Men with post orgasmic illness syndrome (POIS) become ill rather immediately after ejaculation, whether spontaneously at night, during sexual intercourse or masturbation. Two subtypes are distinguished: primary and secondary POIS. It also occurs before or after a man has been sterilized. POIS is an invalidating most probably auto-immune disease leading to much distress in males and their partners. It is characterized by five criteria. Its symptoms are described by seven clusters. However, the manifestation of these symptoms varies from one male to the other but is relatively constant in the person himself. Among men the symptoms vary in intensity, durations and sort of symptoms. POIS is a chronic disorder that manifests itself in POIS “attacks” that occur within a few minutes to a few hours after ejaculation, and disappear spontaneously after 3 to 7 days. POIS is not associated with increased total serum IgE concentrations. On the contrary, there are indications that POIS is triggered by specific cytokines that are released by an auto-immune reaction to the man’s seminal fluid. Indirect clinical evidence suggests that the antigen (Ag) triggering the POIS systemic reaction is not bound to spermatozoa but to seminal fluid produced by prostatic tissue. In addition, POIS may also occur—although rarely—in females. In those cases, it is hypothesized that the Ag is associated with female prostatic tissue around the vagina. PMID:27652231

  5. Post orgasmic illness syndrome (POIS).

    Science.gov (United States)

    Waldinger, Marcel D

    2016-08-01

    Men with post orgasmic illness syndrome (POIS) become ill rather immediately after ejaculation, whether spontaneously at night, during sexual intercourse or masturbation. Two subtypes are distinguished: primary and secondary POIS. It also occurs before or after a man has been sterilized. POIS is an invalidating most probably auto-immune disease leading to much distress in males and their partners. It is characterized by five criteria. Its symptoms are described by seven clusters. However, the manifestation of these symptoms varies from one male to the other but is relatively constant in the person himself. Among men the symptoms vary in intensity, durations and sort of symptoms. POIS is a chronic disorder that manifests itself in POIS "attacks" that occur within a few minutes to a few hours after ejaculation, and disappear spontaneously after 3 to 7 days. POIS is not associated with increased total serum IgE concentrations. On the contrary, there are indications that POIS is triggered by specific cytokines that are released by an auto-immune reaction to the man's seminal fluid. Indirect clinical evidence suggests that the antigen (Ag) triggering the POIS systemic reaction is not bound to spermatozoa but to seminal fluid produced by prostatic tissue. In addition, POIS may also occur-although rarely-in females. In those cases, it is hypothesized that the Ag is associated with female prostatic tissue around the vagina.

  6. STS-70 Post Flight Presentation

    Science.gov (United States)

    Peterson, Glen (Editor)

    1995-01-01

    In this post-flight overview, the flight crew of the STS-70 mission, Tom Henricks (Cmdr.), Kevin Kregel (Pilot), Major Nancy Currie (MS), Dr. Mary Ellen Weber (MS), and Dr. Don Thomas (MS), discuss their mission and accompanying experiments. Pre-flight, launch, and orbital footage is followed by the in-orbit deployment of the Tracking and Data Relay Satellite (TDRS) and a discussion of the following spaceborne experiments: a microgravity bioreactor experiment to grow 3D body-like tissue; pregnant rat muscular changes in microgravity; embryonic development in microgravity; Shuttle Amateur Radio Experiment (SAREX); terrain surface imagery using the HERCULES camera; and a range of other physiological tests, including an eye and vision test. Views of Earth include: tropical storm Chantal; the Nile River and Red Sea; lightning over Brazil. A three planet view (Earth, Mars, and Venus) was taken right before sunrise. The end footage shows shuttle pre-landing checkout, entry, and landing, along with a slide presentation of the flight.

  7. Parameterized Post-Newtonian Cosmology

    CERN Document Server

    Sanghai, Viraj A A

    2016-01-01

    Einstein's theory of gravity has been extensively tested on solar system scales, and for isolated astrophysical systems, using the perturbative framework known as the parameterized post-Newtonian (PPN) formalism. This framework is designed for use in the weak-field and slow-motion limit of gravity, and can be used to constrain a large class of metric theories of gravity with data collected from the aforementioned systems. Given the potential of future surveys to probe cosmological scales to high precision, it is a topic of much contemporary interest to construct a similar framework to link Einstein's theory of gravity and its alternatives to observations on cosmological scales. Our approach to this problem is to adapt and extend the existing PPN formalism for use in cosmology. We derive a set of equations that use the same parameters to consistently model both weak fields and cosmology. This allows us to parameterize a large class of modified theories of gravity and dark energy models on cosmological scales, ...

  8. Post-Retrofit Residential Assessments

    Energy Technology Data Exchange (ETDEWEB)

    Lancaster, Ross; lutzenhiser, Loren; Moezzi, Mithra; Widder, Sarah H.; Chandra, Subrato; Baechler, Michael C.

    2012-04-30

    This study examined a range of factors influencing energy consumption in households that had participated in residential energy-efficiency upgrades. The study was funded by a grant from the U.S. Department of Energy’s Pacific Northwest National Laboratory and was conducted by faculty and staff of Portland State University Center for Urban Studies and Department of Economics. This work was made possible through the assistance and support of the Energy Trust of Oregon (ETO), whose residential energy-efficiency programs provided the population from which the sample cases were drawn. All households in the study had participated in the ETO Home Performance with Energy Star (HPwES) program. A number of these had concurrently pursued measures through other ETO programs. Post-retrofit energy outcomes are rarely investigated on a house-by-house basis. Rather, aggregate changes are ordinarily the focus of program impact evaluations, with deviation from aggregate expectations chalked up to measurement error, the vagaries of weather and idiosyncrasies of occupants. However, understanding how homes perform post-retrofit on an individual basis can give important insights to increase energy savings at the participant and the programmatic level. Taking a more disaggregated approach, this study analyzed energy consumption data from before and after the retrofit activity and made comparisons with engineering estimates for the upgrades, to identify households that performed differently from what may have been expected based on the estimates. A statistical analysis using hierarchal linear models, which accounted for weather variations, was performed looking separately at gas and electrical use during the periods before and after upgrades took place. A more straightforward comparison of billing data for 12-month periods before and after the intervention was also performed, yielding the majority of the cases examined. The later approach allowed total energy use and costs to be

  9. 46 CFR 91.05-15 - Posting.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Posting. 91.05-15 Section 91.05-15 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) CARGO AND MISCELLANEOUS VESSELS INSPECTION AND CERTIFICATION Permit To Proceed to Another Port for Repair § 91.05-15 Posting. (a) The permit shall be carried in...

  10. 46 CFR 189.01-5 - Posting.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Posting. 189.01-5 Section 189.01-5 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OCEANOGRAPHIC RESEARCH VESSELS INSPECTION AND CERTIFICATION Certificate of Inspection § 189.01-5 Posting. (a) The original certificate of inspection shall, in general,...

  11. 46 CFR 169.217 - Posting.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Posting. 169.217 Section 169.217 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) NAUTICAL SCHOOLS SAILING SCHOOL VESSELS Inspection and Certification Certificate of Inspection § 169.217 Posting. The certificate of inspection must be framed...

  12. 46 CFR 196.12-1 - Posting.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Posting. 196.12-1 Section 196.12-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OCEANOGRAPHIC RESEARCH VESSELS OPERATIONS Stability Letter § 196.12-1 Posting. If a stability letter is issued in accordance with the requirements in § 170.120...

  13. 46 CFR 91.01-5 - Posting.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Posting. 91.01-5 Section 91.01-5 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) CARGO AND MISCELLANEOUS VESSELS INSPECTION AND CERTIFICATION Certificate of Inspection § 91.01-5 Posting. (a) On vessels of over 25 gross tons, the original certificate...

  14. 10 CFR 34.53 - Posting.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 1 2010-01-01 2010-01-01 false Posting. 34.53 Section 34.53 Energy NUCLEAR REGULATORY COMMISSION LICENSES FOR INDUSTRIAL RADIOGRAPHY AND RADIATION SAFETY REQUIREMENTS FOR INDUSTRIAL RADIOGRAPHIC OPERATIONS Radiation Safety Requirements § 34.53 Posting. All areas in which industrial radiography is...

  15. 46 CFR 71.01-5 - Posting.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Posting. 71.01-5 Section 71.01-5 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS INSPECTION AND CERTIFICATION Certificate of Inspection § 71.01-5 Posting. The certificate of inspection shall be displayed under glass in a...

  16. 10 CFR 1048.6 - Posting.

    Science.gov (United States)

    2010-01-01

    ... 10 Energy 4 2010-01-01 2010-01-01 false Posting. 1048.6 Section 1048.6 Energy DEPARTMENT OF ENERGY (GENERAL PROVISIONS) TRESPASSING ON STRATEGIC PETROLEUM RESERVE FACILITIES AND OTHER PROPERTY § 1048.6 Posting. Notices stating the pertinent prohibitions of §§ 1048.3 and 1048.4 and the penalties of §...

  17. 46 CFR 126.240 - Posting.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Posting. 126.240 Section 126.240 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OFFSHORE SUPPLY VESSELS INSPECTION AND CERTIFICATION Certificate of Inspection § 126.240 Posting. The Certificate of Inspection must be framed under glass or...

  18. 46 CFR 71.05-15 - Posting.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Posting. 71.05-15 Section 71.05-15 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS INSPECTION AND CERTIFICATION Permit To Proceed to Another Port for Repair § 71.05-15 Posting. (a) The permit shall be carried in a manner similar...

  19. 46 CFR 71.10-15 - Posting.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Posting. 71.10-15 Section 71.10-15 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS INSPECTION AND CERTIFICATION Permit To Engage in Excursions § 71.10-15 Posting. (a) The permit when used, shall be carried in addition to...

  20. Posting of workers : Enforcement problems and challenges

    NARCIS (Netherlands)

    Cremers, Jan

    2013-01-01

    Expert contribution to a final conference. According to the author, monitoring the process of posting and controlling the regular character of the cross-border provision of services with posted workers has proven to be a problematic area. Recent joint activities of the labour inspectorate have confi

  1. 46 CFR 97.11-1 - Posting.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Posting. 97.11-1 Section 97.11-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) CARGO AND MISCELLANEOUS VESSELS OPERATIONS Stability Letter § 97.11-1 Posting. If a stability letter is issued under § 170.120 of this chapter, it must be...

  2. 46 CFR 189.05-15 - Posting.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Posting. 189.05-15 Section 189.05-15 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) OCEANOGRAPHIC RESEARCH VESSELS INSPECTION AND CERTIFICATION Permit To Proceed to Another Port for Repair § 189.05-15 Posting. (a) The permit shall be...

  3. 42 CFR 124.604 - Posted notice.

    Science.gov (United States)

    2010-10-01

    ... other than English or Spanish, the facility shall translate the notice into that language and post the... facility shall post notices, which the Secretary supplies in English and Spanish, in appropriate areas of... room. (b) If in the service area of the facility the “usual language of households” of ten percent...

  4. 77 FR 58592 - Modified Norway Post Agreement

    Science.gov (United States)

    2012-09-21

    ... Modified Norway Post Agreement AGENCY: Postal Regulatory Commission. ACTION: Notice. SUMMARY: The Commission is noticing a recently-filed Postal Service request to include a modified Norway Post Agreement... existing bilateral agreement for inbound competitive services with Posten Norge AS (Modified Norway...

  5. Post-Colonialism Perspectives on Educational Competition

    Science.gov (United States)

    Yeh, Chuan-Rong

    2016-01-01

    Educational competition has always been the puzzle issue of educational researches. In this article, I analyze several aspects of educational competition within the perspective of post-colonialism discourse. In the political aspect, Taiwanese education is linked with political power, to present the post-colonial spirit by continuing dynastic…

  6. The Review of China Post's Informationizing Constructing

    Institute of Scientific and Technical Information of China (English)

    WANG Wei-min; DU Yu-wei; SUN Hao

    2005-01-01

    The article briefly introduces the three stages that China Post experienced and the circumstances of the fundamental network construction, focusing on introducing the three sorts of services based on postal comprehensive computer network's applicable software system: postal financial service; traditional service electrified; electronic postal service. Finally the thinking for future China Post's informationizing constructing is put forward.

  7. Post-Modern Perspectives on Orthodox Positivism

    NARCIS (Netherlands)

    Venzke, I.

    2013-01-01

    This contribution explains the travails of international legal positivism (ILP) from post-modern perspectives. It identifies conventional precepts of orthodox ILP and shows how variants of post-modern thinking unravel them. The focus rests on three main such precepts and their critique: first, ortho

  8. Post-emergence herbicides useful in calendula

    Science.gov (United States)

    Easy and effective weed control is required by growers who are considering new industrial crops. Post-emergence herbicides typically are the products of choice by today’s growers. Unfortunately, post-emergence herbicides with proven safety margins are not known for calendula (Calendula officinalis),...

  9. Diagnostic Uncertainties in Post-stroke Pain

    NARCIS (Netherlands)

    Roosink, M.; Renzenbrink, G.J.; Dongen, van R.T.M.; Buitenweg, J.R.; Geurts, A.C.H.; IJzerman, M.J.

    2008-01-01

    Aim of Investigation Pain is a common complication after stroke. The etiology of post-stroke pain is largely unknown and classification of post-stroke pain subtypes is primarily based on neurological examination and pain assessment. Classification could probably be improved by a better understanding

  10. Post-stroke dementia - a comprehensive review

    NARCIS (Netherlands)

    Mijajlovic, M.D.; Pavlovic, A.; Brainin, M.; Heiss, W.D.; Quinn, T.J.; Ihle-Hansen, H.B.; Hermann, D.M.; Assayag, E.B.; Richard, E.; Thiel, A.; Kliper, E.; Shin, Y.I.; Kim, Y.H.; Choi, S.; Jung, S.; Lee, Y.B.; Sinanovic, O.; Levine, D.A.; Schlesinger, I.; Mead, G.; Milosevic, V.; Leys, D.; Hagberg, G.; Ursin, M.H.; Teuschl, Y.; Prokopenko, S.; Mozheyko, E.; Bezdenezhnykh, A.; Matz, K.; Aleksic, V.; Muresanu, D.; Korczyn, A.D.; Bornstein, N.M.

    2017-01-01

    Post-stroke dementia (PSD) or post-stroke cognitive impairment (PSCI) may affect up to one third of stroke survivors. Various definitions of PSCI and PSD have been described. We propose PSD as a label for any dementia following stroke in temporal relation. Various tools are available to screen and

  11. Patients' quality of life post thyroidectomy.

    LENUS (Irish Health Repository)

    Cashman, E C

    2011-01-01

    This study was designed to evaluate health related quality of life post thyroidectomy for hyperthyroidism with respect to clinical benefit and patient satisfaction. This is one of the first such studies in the literature evaluating quality of life post thyroidectomy for hyperthyroidism.

  12. Diagnostic Uncertainties in Post-stroke Pain

    NARCIS (Netherlands)

    Roosink, M.; Renzenbrink, G.J.; Van Dongen, R.T.M.; Buitenweg, Jan R.; Geurts, A.C.H.; IJzerman, Maarten Joost

    2008-01-01

    Aim of Investigation Pain is a common complication after stroke. The etiology of post-stroke pain is largely unknown and classification of post-stroke pain subtypes is primarily based on neurological examination and pain assessment. Classification could probably be improved by a better understanding

  13. Image post-processing in dental practice.

    Science.gov (United States)

    Gormez, Ozlem; Yilmaz, Hasan Huseyin

    2009-10-01

    Image post-processing of dental digital radiographs, a function which used commonly in dental practice is presented in this article. Digital radiography has been available in dentistry for more than 25 years and its use by dental practitioners is steadily increasing. Digital acquisition of radiographs enables computer-based image post-processing to enhance image quality and increase the accuracy of interpretation. Image post-processing applications can easily be practiced in dental office by a computer and image processing programs. In this article, image post-processing operations such as image restoration, image enhancement, image analysis, image synthesis, and image compression, and their diagnostic efficacy is described. In addition this article provides general dental practitioners with a broad overview of the benefits of the different image post-processing operations to help them understand the role of that the technology can play in their practices.

  14. Precarious posted worlds : Posted migrant workers in the Dutch construction and meat processing industries

    NARCIS (Netherlands)

    Berntsen, Lisa

    2015-01-01

    The posting of migrant workers has become an important employment channel for cross-border employment within the European Union (EU). Although posted workers are not formally excluded from labour rights, regulations are enacted in such a way that de facto they often are, as posted workers face many

  15. Precarious posted worlds : Posted migrant workers in the Dutch construction and meat processing industries

    NARCIS (Netherlands)

    Berntsen, Lisa

    2015-01-01

    The posting of migrant workers has become an important employment channel for cross-border employment within the European Union (EU). Although posted workers are not formally excluded from labour rights, regulations are enacted in such a way that de facto they often are, as posted workers face many

  16. Recovery from post-operative anaemia.

    Science.gov (United States)

    Wallis, J P; Wells, A W; Whitehead, S; Brewster, N

    2005-10-01

    Acceptance of lower transfusion thresholds and shorter post-operative stays results in patients leaving hospital after surgery with lower haemoglobin (Hb) than previously. We undertook a prospective observational study to assess the haematological response to post-operative anaemia and to determine the utility of quality of life (QoL) measures in assessing the impact of anaemia on such patients. Thirty patients undergoing unilateral hip arthroplasty had blood samples taken and QoL questionnaires administered pre-operatively and at 7, 28 and 56 days post-operatively. Increased erythropoiesis was evident at day 7 post-operatively. Approximately two-thirds of the post-operative Hb deficit was corrected by day 28. There was evidence of functional iron deficiency in more than one-quarter of patients at day 56. QoL scores used did not show any relationship with Hb in the post-operative period. Red cell 2,3-diphosphoglycerate (2,3DPG) levels increased in proportion to the degree of post-operative anaemia. We concluded that substantial recovery of Hb occurs between day 7 and day 28 post-operatively. Complete recovery of Hb may be delayed beyond day 56 due to development of iron deficiency. Patients are at significant risk of developing post-operative iron deficiency depending on operative blood loss and pre-operative iron stores. Increased red cell 2,3DPG may offset the effect of anaemia on oxygen delivery. We found no evidence that anaemia produces a measurable effect on chosen QoL scores in the post-operative period.

  17. Post-harvest proteomics and food security.

    Science.gov (United States)

    Pedreschi, Romina; Lurie, Susan; Hertog, Maarten; Nicolaï, Bart; Mes, Jurriaan; Woltering, Ernst

    2013-06-01

    To guarantee sufficient food supply for a growing world population, efforts towards improving crop yield and plant resistance should be complemented with efforts to reduce post-harvest losses. Post-harvest losses are substantial and occur at different stages of the food chain in developed and developing countries. In recent years, a substantially increasing interest can be seen in the application of proteomics to understand post-harvest events. In the near future post-harvest proteomics will be poised to move from fundamental research to aiding the reduction of food losses. Proteomics research can help in reducing food losses through (i) identification and validation of gene products associated to specific quality traits supporting marker-assisted crop improvement programmes, (ii) delivering markers of initial quality that allow optimisation of distribution conditions and prediction of remaining shelf-life for decision support systems and (iii) delivering early detection tools of physiological or pathogen-related post-harvest problems. In this manuscript, recent proteomics studies on post-harvest and stress physiology are reviewed and discussed. Perspectives on future directions of post-harvest proteomics studies aiming to reduce food losses are presented.

  18. Development of new radiopaque glass fiber posts.

    Science.gov (United States)

    Furtos, Gabriel; Baldea, Bogdan; Silaghi-Dumitrescu, Laura

    2016-02-01

    The aim of this study was to analyze the radiopacity and filler content of three experimental glass fiber posts (EGFP) in comparison with other glass/carbon fibers and metal posts from the dental market. Three EGFP were obtained by pultrusion of glass fibers in a polymer matrix based on 2,2-bis[4-(2-hydroxy-3-methacryloyloxypropoxy)-phenyl]propane (bis-GMA) and triethyleneglycol dimethacrylate (TEGDMA) monomers. Using intraoral sensor disks 27 posts, as well as mesiodistal sections of human molar and aluminum step wedges were radiographed for evaluation of radiopacity. The percentage compositions of fillers by weight and volume were investigated by combustion analysis. Two EGFP showed radiopacity higher than enamel. The commercial endodontic posts showed radiopacity as follows: higher than enamel, between enamel and dentin, and lower than dentin. The results showed statistically significant differences (p b 0.05)when evaluatedwith one-way ANOVA statistical analysis. According to combustion analyses, the filler content of the tested posts ranges between 58.84wt.% and 86.02wt.%. The filler content of the tested EGFP ranged between 68.91 wt.% and 79.04 wt.%. EGFP could be an alternative to commercial glass fiber posts. Futureglass fiber posts are recommended to present higher radiopacity than dentin and perhaps ideally similar to or higher than that of enamel, for improved clinical detection. The posts with a lower radiopacity than dentin should be considered insufficiently radiopaque. The radiopacity of some glass fiber posts is not greatly influenced by the amount of filler.

  19. Vistas of the post-industrial city.

    Directory of Open Access Journals (Sweden)

    Malcolm Miles

    2000-02-01

    prosperity, as redundant industrial buildings are re-coded as sites of culture. But if the post-industrial city is a post-modern site of abundance, its benefits are unevenly distributed; centres of affluence construct margins of deprivation. Just as public art lent a veneer of cultural value to urban development in the 1980s, so the re-coding of industrial buildings as sites of culture in the ’90s contributes to a continuing aestheticisation of the city which affirms a dominant spatial order. What strategies, then, are appropriate for art in post-industrial cities?

  20. Post-traumatic Stress Disorder

    Directory of Open Access Journals (Sweden)

    M Yadollahie

    2011-12-01

    Full Text Available Unexpected extreme sudden traumatic stressor may cause post-traumatic stress disorder (PTSD. Important traumatic events include war, violent personal assault (e.g., sexual assault, and physical attack, being taken hostage or kidnapped, confinement as a prisoner of war, torture, terrorist attack, severe car accidents, and natural disasters. In childhood age sexual abuse or witnessing serious injuries or unexpected death of a beloved one are among important traumatic events.PTSD can be categorized into two types of acute and chronic PTSD: if symptoms persist for less than three months, it is termed “acute PTSD,” otherwise, it is called “chronic PTSD.” 60.7% of men and 51.2% of women would experience at least one potentially traumatic event in their lifetime. The lifetime prevalence of PTSD is significantly higher in women than men. Lifetime prevalence of PTSD varies from 0.3% in China to 6.1% in New Zealand. The prevalence of PTSD in crime victims are between 19% and 75%; rates as high as 80% have been reported following rape. The prevalence of PTSD among direct victims of disasters was reported to be 30%–40%; the rate in rescue workers was 10%–20%. The prevalence of PTSD among police, fire, and emergency service workers ranged from 6%–32%. An overall prevalence rate of 4% for the general population, the rate in rescue/recovery occupations ranged from 5% to 32%, with the highest rate reported in search and rescue personnel (25%, firefighters (21%, and workers with no prior training for facing disaster. War is one of the most intense stressors known to man. Armed forces have a higher prevalence of depression, anxiety disorders, alcohol abuse and PTSD. High-risk children who have been abused or experienced natural disasters may have an even higher prevalence of PTSD than adults.Female gender, previous psychiatric problem, intensity and nature of exposure to the traumatic event, and lack of social support are known risk factors for work

  1. Post-stroke language disorders.

    Science.gov (United States)

    Sinanović, Osman; Mrkonjić, Zamir; Zukić, Sanela; Vidović, Mirjana; Imamović, Kata

    2011-03-01

    Post-stroke language disorders are frequent and include aphasia, alexia, agraphia and acalculia. There are different definitions of aphasias, but the most widely accepted neurologic and/or neuropsychological definition is that aphasia is a loss or impairment of verbal communication, which occurs as a consequence of brain dysfunction. It manifests as impairment of almost all verbal abilities, e.g., abnormal verbal expression, difficulties in understanding spoken or written language, repetition, naming, reading and writing. During the history, many classifications of aphasia syndromes were established. For practical use, classification of aphasias according to fluency, comprehension and abilities of naming it seems to be most suitable (nonfluent aphasias: Broca's, transcortical motor, global and mixed transcortical aphasia; fluent aphasias: anomic, conduction, Wernicke's, transcortical sensory, subcortical aphasia). Aphasia is a common consequence of left hemispheric lesion and most common neuropsychological consequence of stroke, with a prevalence of one-third of all stroke patients in acute phase, although there are reports on even higher figures. Many speech impairments have a tendency of spontaneous recovery. Spontaneous recovery is most remarkable in the first three months after stroke onset. Recovery of aphasias caused by ischemic stroke occurs earlier and it is most intensive in the first two weeks. In aphasias caused by hemorrhagic stroke, spontaneous recovery is slower and occurs from the fourth to the eighth week after stroke. The course and outcome of aphasia depend greatly on the type of aphasia. Regardless of the fact that a significant number of aphasias spontaneously improve, it is necessary to start treatment as soon as possible. The writing and reading disorders in stroke patients (alexias and agraphias) are more frequent than verified on routine examination, not only in less developed but also in large neurologic departments. Alexia is an acquired

  2. Post-traumatic Stress Disorder.

    Science.gov (United States)

    Javidi, H; Yadollahie, M

    2012-01-01

    Unexpected extreme sudden traumatic stressor may cause post-traumatic stress disorder (PTSD). Important traumatic events include war, violent personal assault (e.g., sexual assault, and physical attack), being taken hostage or kidnapped, confinement as a prisoner of war, torture, terrorist attack, severe car accidents, and natural disasters. In childhood age sexual abuse or witnessing serious injuries or unexpected death of a beloved one are among important traumatic events.PTSD can be categorized into two types of acute and chronic PTSD: if symptoms persist for less than three months, it is termed "acute PTSD," otherwise, it is called "chronic PTSD." 60.7% of men and 51.2% of women would experience at least one potentially traumatic event in their lifetime. The lifetime prevalence of PTSD is significantly higher in women than men. Lifetime prevalence of PTSD varies from 0.3% in China to 6.1% in New Zealand. The prevalence of PTSD in crime victims are between 19% and 75%; rates as high as 80% have been reported following rape. The prevalence of PTSD among direct victims of disasters was reported to be 30%-40%; the rate in rescue workers was 10%-20%. The prevalence of PTSD among police, fire, and emergency service workers ranged from 6%-32%. An overall prevalence rate of 4% for the general population, the rate in rescue/recovery occupations ranged from 5% to 32%, with the highest rate reported in search and rescue personnel (25%), firefighters (21%), and workers with no prior training for facing disaster. War is one of the most intense stressors known to man. Armed forces have a higher prevalence of depression, anxiety disorders, alcohol abuse and PTSD. High-risk children who have been abused or experienced natural disasters may have an even higher prevalence of PTSD than adults.Female gender, previous psychiatric problem, intensity and nature of exposure to the traumatic event, and lack of social support are known risk factors for work-related PTSD. Working with

  3. CID Post-impact fireball

    Science.gov (United States)

    1984-01-01

    four degraders (one on each engine); and the FAA refined AMK (blending, testing, and fueling a full-size aircraft). The 15 flights had 15 takeoffs, 14 landings and a larger number of approaches to about 150 feet above the prepared crash site under remote control. These flight were used to introduce AMK one step at a time into some of the fuel tanks and engines while monitoring the performance of the engines. On the final flight (No. 15) with no crew, all fuel tanks were filled with a total of 76,000 pounds of AMK and the remotely-piloted aircraft landed on Rogers Dry Lakebed in an area prepared with posts to test the effectiveness of the AMK in a controlled impact. The CID, which some wags called the Crash in the Desert, was spectacular with a large fireball enveloping and burning the B-720 aircraft. From the standpoint of AMK the test was a major set-back, but for NASA Langley, the data collected on crashworthiness was deemed successful and just as important.

  4. CID Post-impact fireball

    Science.gov (United States)

    1984-01-01

    four degraders (one on each engine); and the FAA refined AMK (blending, testing, and fueling a full-size aircraft). The 15 flights had 15 takeoffs, 14 landings and a larger number of approaches to about 150 feet above the prepared crash site under remote control. These flight were used to introduce AMK one step at a time into some of the fuel tanks and engines while monitoring the performance of the engines. On the final flight (No. 15) with no crew, all fuel tanks were filled with a total of 76,000 pounds of AMK and the remotely-piloted aircraft landed on Rogers Dry Lakebed in an area prepared with posts to test the effectiveness of the AMK in a controlled impact. The CID, which some wags called the Crash in the Desert, was spectacular with a large fireball enveloping and burning the B-720 aircraft. From the standpoint of AMK the test was a major set-back, but for NASA Langley, the data collected on crashworthiness was deemed successful and just as important.

  5. Evaluation of pre-fabricated root canal posts.

    Science.gov (United States)

    Hew, Y S; Purton, D G; Love, R M

    2001-03-01

    In this in vitro study, properties of a titanium alloy post recently introduced to the market (IntegraPost), were compared with those of a clinically proven stainless steel post (ParaPost). The IntegraPost has a unique, perforated, spherical head and a microknurled shank surface. The posts were tested for rigidity, for retention within the root canals of extracted teeth and for ability to retain composite resin cores. The two post types exhibited similar properties in core and root canal retention, however, the IntegraPost was significantly less rigid than the ParaPost.

  6. THE BLEACHING SYNDROME: MANIFESTATION OF A POST ...

    African Journals Online (AJOL)

    User

    The post-colonial root of African problems is directly related to skin color. Under the cloak of personal ... KEY TERMS: Bleaching Syndrome; skin color; colonization; women; light skin ..... Through my grandfather's eyes: Ties that bind. National ...

  7. EVALUATION OF POST-OPERATIVE SENSITIVITY AND ...

    African Journals Online (AJOL)

    Prof

    composites in wear resistance and achievement of good proximal contour ... change in result was recorded for post-operative sensitivity at the end of the evaluation period. 100% was recorded ..... Overcoming challenges with resin in class II ...

  8. Post-postmodernism and Continuing Education.

    Science.gov (United States)

    Leicester, Mal

    2000-01-01

    Attempts to explore the epistemological dimensions of postmodernism. Develops a less problematic post-postmodern perspective, influenced by Wittgenstein. Notes how this perspective is consistent with theory and practice in adult and continuing education. (SK)

  9. Russia's science minister keeps cabinet post

    CERN Multimedia

    1999-01-01

    Mikhail Kirpichnikov, minister for science and technology has kept his post in the cabinet of the new prime minister Sergei Stepashin. Yevgeniy Adamov also remains as minister of atomic energy (2 paragraphs).

  10. Polio and Post-Polio Syndrome

    Science.gov (United States)

    ... who've had polio develop post-polio syndrome (PPS) years later. Symptoms include tiredness, new muscle weakness, ... There is no way to prevent or cure PPS. The polio vaccine has wiped out polio in ...

  11. Post-Release Success among Paroled Lifers

    NARCIS (Netherlands)

    Liem, M.C.A.; Garcin, J.

    2014-01-01

    Previous research suggests that social relations, in particular the forming of family ties and employment (social factors), self-efficacy (personal factors), and therapeutic interventions (institutional factors) constitute main contributors in post-release success. These studies, however, have large

  12. Post-communism: postmodernity or modernity revisited?

    Science.gov (United States)

    Ray, L

    1997-12-01

    Coinciding with the popularity of postmodern theory, the fall of communism appeared to offer further evidence of the exhaustion of modernity. Such analysis is grounded in a view that the Soviet system was the epitome of modernity. An alternative approach regards post-communism as opening new terrains of struggle for modernity. Thus Habermas and others suggest that post-communist societies are rejoining the trajectory of western modernity whose problems they now recapitulate. This alternative view implies that Soviet systems were something other than 'modern', although their nature is not always clearly defined. However, even if post-communist societies do encounter problems of modernity, they do so in new circumstances where modernist notions of social development have become problematic. This article argues that, contrary to those who regard modernization or postmodernization as irresistible trends, core post-communist societies are likely to develop along an alternative path to that of western modernity. This is tentatively described as 'neo-mercantilist'.

  13. Post-Treatment Lyme Disease Syndrome

    Science.gov (United States)

    ... FAQ Health care providers Educational materials Post-Treatment Lyme Disease Syndrome Recommend on Facebook Tweet Share Compartir It ... ONE 7(1): e29914. HHS Special Webinar on Lyme Disease Persistence frame support disabled and/or not supported ...

  14. Learning Styles and Online Discussion Posts

    Directory of Open Access Journals (Sweden)

    Herbert Rau

    2014-03-01

    Full Text Available Scholars have suggested models proposing a variety of learning styles for humans. Human Dynamics is one such model, and it has been suggested within its model that one style of learning is enhanced by discussion among learners. While this style of learning may be accomplished relatively easily in an on-campus person-to-person situation, it is not clear how a discussion mode (online posts of learning might be accomplished in an online format. A study of more than 9,000 posts from 240 students in 11 different online classes was conducted to determine whether differences in online discussion posts by individuals with different learning styles were evident. Results of the study suggest that discussion post activity, if managed with suitable rubrics and guiding principles, and augmented by appropriate modeling behavior, is an effective teaching mode for all dynamics, but seem to be a more successful learning mode for individuals of Physically Centered dynamics.

  15. Post-Release Success among Paroled Lifers

    NARCIS (Netherlands)

    Liem, M.C.A.; Garcin, J.

    2014-01-01

    Previous research suggests that social relations, in particular the forming of family ties and employment (social factors), self-efficacy (personal factors), and therapeutic interventions (institutional factors) constitute main contributors in post-release success. These studies, however, have

  16. Healthcare workers' knowledge, attitudes, practices on post ...

    African Journals Online (AJOL)

    Healthcare workers' knowledge, attitudes, practices on post exposure ... in the same proportions leading to increased risk of exposure to and transmission of HIV through ... This hospital based study of 316 health care workers (HCW) in Dar Es ...

  17. Pain Management: Post-Amputation Pain

    Science.gov (United States)

    ... of post-op pain or pain in the phantom limb, (which has been removed), early referral to a ... could not), can be experienced in the amputated "phantom" limb. Virtually all amputees who are old enough to ...

  18. Social consciousness in post-conflict reconstruction.

    NARCIS (Netherlands)

    Gans, Ben; Rutkowski, Anne; Kaminski, B.; Kersten, G.E.; Szapiro, T.

    This paper sheds light on the complexities intergovernmental organizations are facing during post-conflict reconstruction. The article discusses the added-value of Social Responsibility in the context of the Comprehensive Approach, involving collaboration amongst defense, diplomacy and development.

  19. Fracture strength of endodontically treated teeth reconstructed with woven polyethylene fiber posts and biological posts

    Directory of Open Access Journals (Sweden)

    Kátia Rodrigues Reis

    2009-01-01

    Full Text Available Objective: To investigate the fracture strength and mode of endodontically treated teeth with structurally weakened roots reconstructed with woven polyethylene fiber posts and biological posts. Methods: After removing the crowns, 60 endodontically treated maxillary canines were distributed into 4 groups: 1 conventional root canal preparation and reconstruction with polyethylene fiber posts; 2 conventional root canal preparation and reconstruction with biological posts; 3 moderately flared root canals and reconstruction with biological posts; 4 widely flared root canals and reconstruction with biological posts. The posts were cemented with resin cement Enforce (Dentsply Ind. e Com., Petrópolis, Rio de Janeiro, Brasil and the core was constructed with Ti-Core (EssentialDental Systems, S. Hackensack, NJ, USA resin composite. The specimens were tested under compression in a universal testing machine. Results: The following fracture strength values were obtained: Group 1 – 45.46kgf; Group 2 – 53.30kgf; Group 3 – 58.67kgf; Group 4 – 47.91kgf, with statistically significant differences between Groups 1 and 3 (p<0.05. The following fracture modes were observed: Group 1 – predominance of fracture of the coronal portion of the post; Groups 2 and 3 – various fracture patterns; Group 4 – all roots fractured. Conclusion: Both posts were shown to be promising (adequate fracture strength and favorable pattern of fracture. Biological posts appear to be capable of reinforcing the root to some extent; however, fracture occured in all roots with widely flared root canals.

  20. Gene Therapy for Post-Traumatic Osteoarthritis

    Science.gov (United States)

    2015-10-01

    AD______________ AWARD NUMBER: W81XWH-14-1-0498 TITLE: Gene Therapy for Post-Traumatic Osteoarthritis PRINCIPAL INVESTIGATOR: Steven C...COVERED 30Sept 2014 - 29 Sept 2015 4. TITLE AND SUBTITLE 5a. CONTRACT NUMBER Gene Therapy for Posttraumatic Osteoarthritis 5b. GRANT NUMBER...Osteoarthritis (OA) Gene Therapy Equine Adeno-Associated Virus (AAV) Interleukin-1 Receptor Antagonist (IL-1Ra) Post-traumatic OA (PTOA) Self

  1. Cantilever steel post damaged by wind

    Directory of Open Access Journals (Sweden)

    Wei Sha

    2014-10-01

    Full Text Available An analysis for the cause of fracture failure of a cantilever steel sign post damaged by wind has been carried out. An unusual cause of failure has been identified, which is the subject of this paper. Microscopy and microanalysis of the fracture surface showed that the failure was due to pre-existing cracks, from the fabrication of the post. This conclusion was reached after detecting and analysing a galvanised layer on the fracture surfaces.

  2. Post-Phenomenological Sociology of the Body

    Directory of Open Access Journals (Sweden)

    Tomaž Krpič

    2008-12-01

    Full Text Available This article discusses the works of two classic philosophic writers, Edmund Husserl and Maurice Merleau-Ponty, by focusing on the significance of both writers for the post-phenomenological nature of the sociology of the body. With their reflections on the “living body” and its position in the world, Husserl and Merleau-Ponty both pave the way to phenomenological thought and consolidate its place in the post-phenomenological sociology of the body.

  3. All General Solutions of Post Equations

    Institute of Scientific and Technical Information of China (English)

    Dragi(c) BANKOVI(C)

    2007-01-01

    In a previous paper, we have described all reproductive general solutions of a Post equation, supposing that a general solution is known. In this paper we describe all general solutions of Post equation, supposing that a general solution of this equation is known (Theorem 6). As a special case we get the previous characterization of reproductive solutions and a similar result for Boolean equations (Theorem 9).

  4. Post-Lie algebras and factorization theorems

    Science.gov (United States)

    Ebrahimi-Fard, Kurusch; Mencattini, Igor; Munthe-Kaas, Hans

    2017-09-01

    In this note we further explore the properties of universal enveloping algebras associated to a post-Lie algebra. Emphasizing the role of the Magnus expansion, we analyze the properties of group like-elements belonging to (suitable completions of) those Hopf algebras. Of particular interest is the case of post-Lie algebras defined in terms of solutions of modified classical Yang-Baxter equations. In this setting we will study factorization properties of the aforementioned group-like elements.

  5. POST - A New Look at Stratocumulus

    Science.gov (United States)

    2010-07-01

    1 10.1 POST - A New Look at Stratocumulus H. Gerber , G. Frick , S. P. Malinowski , W . Kumula , S...interesting to note that another flight shows entirely different behavior: Malinowski et al (2010) finds positive T’ in LW C holes near cloud top in...parameterization will also rely on ongoing analysis by POST colleagues described in Malinowski et al (2010), Hill et al (2010), W ang, Q., et al (2010), and W ang

  6. Content analysis of cancer blog posts*

    Science.gov (United States)

    Kim, Sujin

    2009-01-01

    Objectives: The efficacy of user-defined subject tagging and software-generated subject tagging for describing and organizing cancer blog contents was explored. Methods: The Technorati search engine was used to search the blogosphere for cancer blog postings generated during a two-month period. Postings were mined for relevant subject concepts, and blogger-defined tags and Text Analysis Portal for Research (TAPoR) software–defined tags were generated for each message. Descriptive data were collected, and the blogger-defined tags were compared with software-generated tags. Three standard vocabularies (Opinion Templates, Basic Resource, and Medical Subject Headings [MeSH] Resource) were used to assign subject terms to the blogs, with results compared for efficacy in information retrieval. Results: Descriptive data showed that most of the studied cancer blogs (80%) contained fewer than 500 words each. The numbers of blogger-defined tags per posting (M = 4.49 per posting) were significantly smaller than the TAPoR keywords (M = 23.55 per posting). Both blogger-defined subject tags and software-generated subject tags were often overly broad or overly narrow in focus, producing less than effective search results for those seeking to extract information from cancer blogs. Conclusions: Additional exploration into methods for systematically organizing cancer blog postings is necessary if blogs are to become stable and efficacious information resources for cancer patients, friends, families, or providers. PMID:19851489

  7. Content analysis of cancer blog posts.

    Science.gov (United States)

    Kim, Sujin

    2009-10-01

    The efficacy of user-defined subject tagging and software-generated subject tagging for describing and organizing cancer blog contents was explored. The Technorati search engine was used to search the blogosphere for cancer blog postings generated during a two-month period. Postings were mined for relevant subject concepts, and blogger-defined tags and Text Analysis Portal for Research (TAPoR) software-defined tags were generated for each message. Descriptive data were collected, and the blogger-defined tags were compared with software-generated tags. Three standard vocabularies (Opinion Templates, Basic Resource, and Medical Subject Headings [MeSH] Resource) were used to assign subject terms to the blogs, with results compared for efficacy in information retrieval. Descriptive data showed that most of the studied cancer blogs (80%) contained fewer than 500 words each. The numbers of blogger-defined tags per posting (M = 4.49 per posting) were significantly smaller than the TAPoR keywords (M = 23.55 per posting). Both blogger-defined subject tags and software-generated subject tags were often overly broad or overly narrow in focus, producing less than effective search results for those seeking to extract information from cancer blogs. Additional exploration into methods for systematically organizing cancer blog postings is necessary if blogs are to become stable and efficacious information resources for cancer patients, friends, families, or providers.

  8. Microbiological Study of Cast Posts before Cementation

    Science.gov (United States)

    Ojeda-Garces, Juan Carlos

    2017-01-01

    This study identifies the most common microorganisms present in type III gold cast posts related to pulpal disease and evaluates the sterilization/disinfection method before cementation in the root canal. Forty-five type III gold cast posts were aseptically collected in sterile sealed plastic bags and taken to the microbiology laboratory to carry out the study: fifteen cast posts had no treatment, fifteen were disinfected (immersion in 70% alcohol during 15 minutes), and fifteen were autoclaved at 121°C for 15 minutes by using saturated steam under 15 psi pressure. By using a two-proportion z-test, the difference was statistically significant (p > 0.05) and demonstrates that, in spite of the aseptic pattern used in the cast post collection and laboratory procedures, some cast posts arrive contaminated at the consulting office. The disinfection process worked out in a high percentage and demonstrated that the sterilization by autoclaving eliminated completely the pathogenic microbiota without affecting the cast post shape and integrity that could compromise their final fitting.

  9. Microbiological Study of Cast Posts before Cementation

    Directory of Open Access Journals (Sweden)

    Maricela Vallejo-Labrada

    2017-01-01

    Full Text Available This study identifies the most common microorganisms present in type III gold cast posts related to pulpal disease and evaluates the sterilization/disinfection method before cementation in the root canal. Forty-five type III gold cast posts were aseptically collected in sterile sealed plastic bags and taken to the microbiology laboratory to carry out the study: fifteen cast posts had no treatment, fifteen were disinfected (immersion in 70% alcohol during 15 minutes, and fifteen were autoclaved at 121°C for 15 minutes by using saturated steam under 15 psi pressure. By using a two-proportion z-test, the difference was statistically significant (p>0.05 and demonstrates that, in spite of the aseptic pattern used in the cast post collection and laboratory procedures, some cast posts arrive contaminated at the consulting office. The disinfection process worked out in a high percentage and demonstrated that the sterilization by autoclaving eliminated completely the pathogenic microbiota without affecting the cast post shape and integrity that could compromise their final fitting.

  10. Post-translational modifications in neurodegeneration

    Directory of Open Access Journals (Sweden)

    Federico Benetti

    2015-12-01

    Full Text Available Post-translational modifications increase proteome functionality for managing all aspects of normal cell biology. They are based on the covalent attachment of functional groups, leading to phosphorylation, acetylation, glycosylation, acylation, ubiquitination, SUMOylation and oxidation of protein targets. Post-translational modifications occur at any step of protein life cycle, modulating in time and space protein folding, subcellular localization and activity. Aberrant post-translational modifications of one or more culprit proteins may lead to neurodegeneration, as shown in paradigmatic neurological disorders such as Alzheimer’s, Parkinson’s and prion diseases. In this review, we report the most important post-translational modifications found in neurodegenerative disorders, illustrating the pathophysiological mechanisms in which they are involved. This work highlights the lack of a global framework of post-translational modifications in terms of complexity and regulation. Therefore, in the next future many efforts are required to describe the interplay existing between post-translational modifications and their combinatorial patterns on protein targets.

  11. Post-Human Body and Beauty

    Directory of Open Access Journals (Sweden)

    Maria Teresa Russo

    2014-01-01

    Full Text Available El artículo pone en duda la posibilidad misma de una estética post-humana, a partir de la siguiente premisa: en lugar de post-humano, es más correcto hablar de post-natural, indicando con esta expresión una realidad producida a través de un nuevo tipo de evolución, que no cambia simplemente la naturaleza humana, sino que la des-naturaliza, transformándola radicalmente en artefacto. Esta post-naturaleza, que aspira a ser perfecta, inmortal, invulnerable, es totalmente carente de belleza. De hecho, si bien puede haber una estética de lo artificial y también del artefacto, en relación con los objetos, en cambio no puede darse una estética del cuerpo post-humano, debido a que éste se configura como un no-cuerpo y no tiene las características de lo que comúnmente se entiende por belleza (armonía entre materia y forma, reflejo de interioridad, unicidad. También en este caso, es más correcto hablar de post-belleza, que en sus propiedades parece una imagen especular de la belleza y, en última instancia, constituye su completa disolución.

  12. Post silanization improves bond strength of translucent posts to flowable composite resins.

    Science.gov (United States)

    Albaladejo, Alberto; Osorio, Raquel; Papacchini, Federica; Goracci, Cecilia; Toledano, Manuel; Ferrari, Marco

    2007-08-01

    The aim of the study is to evaluate the effect of post silanization on the microtensile bond strength (MTBS) of translucent fiber posts to seven flowable composite resins used as core material. Seventy fiber posts were employed. In half of the posts, silanization was performed with Monobond-S. A cylindrical plastic matrix was placed around the post and filled with different resins: UniFil Flow Experimental, UniFil Low Flow Plus Experimental, Venus Flow, Revolution Formula 2, Point 4 Flowable, X-Flow, and Wave mv. Five posts were bonded per group. After polymerization, two longitudinal cuts were made on two opposite sides of the post at its outermost periphery. Then, each specimen was serially sectioned, obtaining 30-35 beams with 1-mm(2) cross-sectional area. Each beam was tested in tension in an Instron machine at 0.5 mm/min. ANOVA and Student Newman Keuls tests were performed. The different resin composite materials and the post silanization procedure had a significant effect on MTBS. The application of a silane coupling agent increased MTBS of flowable composite resins to translucent posts. X-flow and Point 4 attained the highest MTBS regardless of the silane treatment.

  13. Evaluation of post-surface conditioning to improve interfacial adhesion in post-core restorations

    Directory of Open Access Journals (Sweden)

    Mylswamy Sumitha

    2011-01-01

    Full Text Available Aim : To examine the influence of different post-surface treatments on the interfacial strength between epoxy resin-based fiber posts and methacrylate-based resin composites that are employed as core build-up materials. Materials and Methods : Forty clear posts were divided into four groups of 10 each. The different surface treatments used were etching with alkaline potassium permanganate, 10% hydrogen peroxide, 37% phosphoric acid, and silanization alone. After etching and thorough rinsing, a single layer of silane was applied to the post surface. Then the post was placed in a rectangular plastic matrix and core bulid-up was done using Multi Core, a dual cured composite resin. A slab of uniform thickness, with the post in the center and the core build-up composite on either side was created. The specimens were cut so as to obtain microtensile sticks that were loaded in tension at a cross-head speed of 1 mm/min until failure. The statistical analysis was performed using two-way ANOVA and the paired T test for post-hoc comparisons. Results : The results achieved with potassium permanganate had a significant influence on microtensile interfacial bond strength values with the tested material. Conclusion : Surface chemical treatments of the resin phase of fiber posts enhance the silanization efficiency of the quartz fiber phase, so that the adhesion in the post/core unit may be considered as a net sum of chemical and micromechanical retention.

  14. In vivo studies on flexion and extension of the lumbar spine after stabilisation with a non-fusion pedicle screw system Estudios in vivo de flexión y extensión de la columna lumbar después de estabilización con un sistema de tornillo de pedículo de no fusión Estudos in vivo sobre flexão e extensão da coluna lombar após estabilização com sistema de parafuso pedicular com técnica de não-fusão

    Directory of Open Access Journals (Sweden)

    Jörg Rainer Klauß

    2012-09-01

    that overall mobility and segmental micro-motion were retained after non-fusion stabilisation of the lumbar spine with monosegmental and bisegmental instrumentation. The adjacent cranial segment (IVS did not collapse. Activity levels (ODI and pain symptoms (VAS of the patients showed significant improvement at follow-up, comparable to that reported in the literature for conventional rigid spinal fusions.OBJETIVO: Fue determinar in vivo si la movilidad preoperatoria de la espina lumbar (general y segmentaria se mantiene después de la intervención quirúrgica. MÉTODOS: La representación por imágenes de la espina lumbar se realizó en flexión y extensión, usándose una proyección lateral en condiciones estandarizadas. Esto permitió la evaluación de la movilidad general, la movilidad de los segmentos móviles instrumentados y la altura de disco del segmento craneano adyacente (espacio intervertebral; IVS, antes y después de la intervención quirúrgica. Las imágenes fueron evaluadas, independientemente, por un radiólogo y un cirujano ortopedista. Un análisis comparativo de las imágenes funcionales preoperatorias y posoperatorias fue realizado con la ayuda de una computadora y del software apropiado (ACES para evaluación adicional de la extensión hasta la cual se mantuvo la amplitud del movimiento. El Índice de Incapacidad de Oswestry (ODI, evaluación de la calidad de vida y la escala análoga visual (VAS, evaluación del dolor fueron usados como criterios clínicos y comparados antes y después de la cirugía. Los intervalos promedio de seguimiento (FU fueron 13,5 días (FU 1 y 19 meses (FU 2. RESULTADOS: Los resultados radiológicos muestran que la movilidad general de la espina lumbar (L1 a S1 se redujo, en promedio, en un tercio de la amplitud de flexión/extensión, de 25,0º antes de la cirugía a 17,6º después de la cirugía. La movilidad segmentaria, de la estabilización monosegmentaria, disminuyó, en promedio, de 3,7º a 2,3º. Los segmentos

  15. Post-Colonial Theory and Action Research

    Directory of Open Access Journals (Sweden)

    Jim B. Parsons

    2011-04-01

    Full Text Available This essay explores connections between post-colonial theory and action research. Post-colonial theory is committed to addressing the plague of colonialism. Action research, at its core, promises to problematize uncontested ‘colonial’ hegemonies of any form. Both post-colonial theory and action research engage dialogic, critically reflective and collaborative values to offer a fuller range of human wisdom. The authors contend that post-colonialism theory calls for justice and seeks to speak to social and psychological suffering, exploitation, violence and enslavement done to the powerless victims of colonization around the world by challenging the superiority of dominant perspectives and seeking to re-position and empower the marginalized and subordinated. In similar ways, action research works to eradicate oppression, powerlessness and worthlessness by affirming solidarity with the oppressed, helping humans move from passive to active and by fundamentally reshaping power. Because both post-colonial theory and action research position the insider or oppressed in an ethic of efficacy, it values community, relationships, communication and equality, and is committed to reciprocity, reflexivity and reflection. Thus, both hold the potential to help reconstruct conditions for a more democratic and just society.

  16. Post-insemination sexual selection in birds.

    Science.gov (United States)

    Pizzari, Tommaso

    2007-01-01

    In many avian species females obtain sperm from multiple males during a single reproductive event, setting the scene for post-insemination sexual selection through the competition of the ejaculates of different males over fertilisation (sperm competition) and female biased utilisation of sperm (cryptic female choice). The use of poultry techniques in combination with molecular tools is catalysing an interest in birds as vertebrate model systems to study the mechanisms of post-insemination sexual selection. This chapter: (i) outlines the main mechanisms of avian sperm competition, (ii) introduces methodological approaches to study post-insemination sexual selection in birds, (iii) reviews recent evidence of multiple mechanisms of strategic sperm allocation by males, and (iv) discusses mechanisms of cryptic female choice. Post-insemination variance in paternity in birds, appears to be determined by the interactions between complex male and female strategies of differential sperm utilisation. It is argued that a better understanding of the operation of post-insemination sexual selection in birds may be achieved through a two-pronged approach which, on the one hand, investigates behavioural and physiological mechanisms applying poultry techniques and molecular tools to domestic model species, and on the other, verifies these mechanisms and tests their adaptive significance in more natural populations.

  17. POST TRAUMATIC GROWTH PADA PENDERITA KANKER PAYUDARA

    Directory of Open Access Journals (Sweden)

    Erlina Listiyanti Widuri

    2012-03-01

    Full Text Available One of the deadly diseases for women is breast cancer. The wisdomdefined in this study was post traumatic growth. Post traumatic growth is apositive changes experience arising from the struggle of the great crises oflife. The purpose of this study was to determine the growth dynamics ofpost traumatic or post-traumatic growth toward positive life changes andwant to understand further the factors that influence the formation of posttraumatic growth in patients with breast cancer. The method used is basedon qualitative research using phenomenology method. The analysis showedthere were two factors that affecting the aspects of post traumatic growthin patients with breast cancer. External factors are the children andgrandchildren as life expectation and as encouragement or motivationsupport of both parents to perform the treatment, so it eventually leads tothe strengthening of internal factors. Internal factors include the factor offaith (spirituality, a strong desire to recover factors (optimism, resiliencefactors, and reframing factors. There are 4 (four post traumatic growtharising from the struggle with breast cancer in the face of illness: an increasein spirituality, positive improvement in life, and the higher prosocial andbetter social relations.

  18. Marijuana-Related Posts on Instagram.

    Science.gov (United States)

    Cavazos-Rehg, Patricia A; Krauss, Melissa J; Sowles, Shaina J; Bierut, Laura J

    2016-08-01

    Instagram is a highly visual social networking site whose audience continues to grow, especially among young adults. In the present study, we examine marijuana-related content on Instagram to better understand the varied types of marijuana-related social networking occurring on this popular social media platform. We collected 417,561 Instagram posts with marijuana-related hashtags from November 29 to December 12, 2014. We assessed content of a random sample (n = 5000) of these posts with marijuana-related hashtags. Approximately 2136 (43 %) were explicit about marijuana and further analyzed. Of the 2136 marijuana-related posts, images of marijuana were common (n = 1568). Among these 1568 marijuana images, traditional forms (i.e., buds/leaves) were the most common (63 %), followed by some novel forms of marijuana, including marijuana concentrates (20 %). Among the 568 posts that displayed marijuana being ingested, 20 % showed someone dabbing marijuana concentrates. Marijuana-related advertisements were also observed among the 2136 marijuana-related posts (9 %). Our findings signal the promotion of marijuana use in its traditional plant-based form; trendy and novel modes of marijuana ingestion were also endorsed. This content along with the explicit marketing of marijuana that we observed on Instagram have potential to influence social norms surrounding marijuana use.

  19. Morphological classification of post-AGB stars

    CERN Document Server

    Manchado, A; Villaver, E; de Massas, J Guironnet

    2011-01-01

    We present a complete study of the morphology of post-Asymptotic Giant Branch (AGB) stars. Post-AGB is a very short evolutionary phase between the end of the AGB and the beginning of the Planetary Nebula (PN) stage (between 100 and 10,000 yrs). We have defined the end of the post-AGB phase and the beginning of the PN phase when the star is hot enough to fully ionize the hydrogen envelope. Post-AGB stars have a circumstellar shell that is illuminated by the central stars or partially ionized. However, this circumstellar shell is too small to be resolved from ground-based observations. Thus, we have used data from the Hubble Space Telescope (HST) database to resolve these shells. About 150 post-AGB were found in this database. Here we present the preliminary results on their morphological classification and the correlation with several parameters such as galactic latitude and IRAS fluxes. Our preliminary results show that 40% of the sample are stellar-like (S), 33 % bipolar (B), 12 % multi-polar (M) and 15 % el...

  20. Post-partum acute kidney injury

    Directory of Open Access Journals (Sweden)

    Naresh Pahwa

    2014-01-01

    Full Text Available To determine the risk factors, course of hospital stay and mortality rate among women with post-partum acute kidney injury (AKI, we studied (of 752 patients with AKI admitted to a tertiary care center during the study period between November 2009 and August 2012 27 (3.59% women with post-partum AKI. The data regarding age, parity, cause of renal failure, course of hospital stay and requirement of dialysis were recorded. Sepsis was the major cause (70.3% of post-partum AKI. Other causes included disseminated intravascular coagulation (55.5%, pre-eclampsia/eclampsia (40.7%, ante- and post-partum hemorrhage (40.7% and 22.2% and hemolytic anemia and elevated liver enzymes and low platelet count syndrome (29.6%; most patients had more than one cause of AKI. We found a very high prevalence (18.5% of cortical necrosis in our study patients. A significant correlation was also found between the creatinine level on admission and the period of onset of disease after delivery. In conclusion, several factors are involved in causing post-partum AKI in our population, and sepsis was the most common of them.

  1. STRESS PROLONGS WOUND HEALING POST CESAREAN SECTION

    Directory of Open Access Journals (Sweden)

    Ah. Yusuf

    2017-07-01

    Full Text Available Introduction: Decision for cesarean section may lead to the stress for women in delivery. Stress response requires longer recovery time in post cesarean section patients. Most of patients who experience stress before and after surgical is associated with wound healing delay. When this condition continues, the wound will have a higher risk of infection. The objective of this study was to analyze correlation between stress and wound healing phase in post cesarean section patients. Method: A cross sectional design was used in this study. The population were women with cesarean section, both elective or emergency, in Delivery Room I RSU Dr. Soetomo Surabaya. Samples were recruited by using purposive sampling, with 28 samples who met to the inclusion criterias. The observed variables were stress and wound healing phase in post cesarean section patient. Stress data were collected by interview and wound healing measurement done by observation on the 3rd day post cesarean section. Result: The result showed that women with stress experience wound healing delay. The characteristic of wound healing delay was prolonged on inflammation phase, nevertheless there was presence of granulation tissue. Spearman’s rho correlation showed that correlation value r=0.675 with p=0.000. Discussion: It can be concluded that there was strong significant correlation between stress and wound healing phase in post cesarean section patients. It is important to give this information to the patients with cesarean section in order to prevent stress and delay in wound healing phase.

  2. Post-colonial identity in Greenland?

    DEFF Research Database (Denmark)

    Gad, Ulrik Pram

    2009-01-01

    could be furthered by bringing politics back in. Based on a discourse analysis of the Greenlandic debate on language, this paper makes three claims: First, the identity projects promoted in Greenland are based on an essentialist conception of identity. Secondly, Greenlandic identity discourse combines......In the gradual unravelling of Greenland’s colonial relationship to Denmark, an essentialist conceptualization of Greenlandic identity has played a significant role. However, both our scholarly understanding of post-colonial Greenlandic identity and the process towards independence for Greenland...... elements of traditional Inuit culture and elements of colonial modernity. Thirdly, monolingual Greenlanders are those with the most to gain from abandoning the dichotomy of essentialist identities. Strategically, the paper suggests a post-post-colonial Greenlandic identity as a means of avoiding...

  3. STS, symmetry and post-truth.

    Science.gov (United States)

    Lynch, Michael

    2017-08-01

    This essay takes up a series of questions about the connection between 'symmetry' in Science and Technology Studies (STS) and 'post-truth' in contemporary politics. A recent editorial in this journal by Sergio Sismondo argues that current discussions of 'post-truth' have little to do with conceptions of 'symmetry' or with concerns about 'epistemic democracy' in STS, while others, such as Steve Fuller and Harry Collins, insist that there are such connections. The present essay discusses a series of questions about the meaning of 'post-truth' and 'symmetry', and the connections of those concepts to each other and to 'epistemic democracy'. The essay ends with a series of other questions about STS and contemporary politics, and an invitation to further discussions.

  4. Patient expectancy and post-chemotherapy nausea

    DEFF Research Database (Denmark)

    Colagiuri, Ben; Zachariae, Robert

    2010-01-01

    , specifically controlling for a history of nausea, and involving breast cancer patients, none of the moderators assessed were statistically significant. CONCLUSIONS: These findings suggest that patient expectancies may contribute to post-chemotherapy nausea and that expectancy-based manipulations may provide......BACKGROUND: Post-chemotherapy nausea remains a significant burden to cancer patients. While some studies indicate that expecting nausea is predictive of experiencing nausea, there are a number of conflicting findings. PURPOSE: The purpose of this study was to conduct a meta-analytic review......, there was a robust positive association between expectancy and post-chemotherapy nausea (ESr = 0.18, equivalent to Cohen's d = 0.35), suggesting that patients with stronger expectancies experience more chemotherapy-induced nausea. Although weaker associations were found in studies employing multivariate analysis...

  5. Adolf Hitler had post-encephalitic Parkinsonism.

    Science.gov (United States)

    Lieberman, A

    1996-04-01

    Adolf Hitler had Parkinson symptoms in 1934, at age 45 years. He may have had transient symptoms in 1923, at age 34 years. Young-onset parkinsonism, during the 1920s, favored a diagnosis of post-encephalitic rather than idiopathic parkinsonism. Hitler had oculogyric crises, phenomena only associated with post-encephalitic parkinsonism. In addition, he had dystonic facial spasms, palilalia and a sleep disorder, phenomena more likely to be associated with post-encephalitic than idiopathic parkinsonism. In November 1918, at age 29 years, Hitler may have had von Economo's encephalitis, while he was a patient in a hospital, recovering from poison gas. This paper looks at the possible relationship of von Economo's encephalitis to Hitler's asocial behavior; his obsessions and compulsions, his cruelty and rages. The influence of Hitler's parkinsonism on his conduct during World War II is discussed.

  6. Post-colonial identity in Greenland?

    DEFF Research Database (Denmark)

    Gad, Ulrik Pram

    2009-01-01

    In the gradual unravelling of Greenland’s colonial relationship to Denmark, an essentialist conceptualization of Greenlandic identity has played a significant role. However, both our scholarly understanding of post-colonial Greenlandic identity and the process towards independence for Greenland...... could be furthered by bringing politics back in. Based on a discourse analysis of the Greenlandic debate on language, this paper makes three claims: First, the identity projects promoted in Greenland are based on an essentialist conception of identity. Secondly, Greenlandic identity discourse combines...... elements of traditional Inuit culture and elements of colonial modernity. Thirdly, monolingual Greenlanders are those with the most to gain from abandoning the dichotomy of essentialist identities. Strategically, the paper suggests a post-post-colonial Greenlandic identity as a means of avoiding...

  7. Post-retail Responsibility of Garments

    DEFF Research Database (Denmark)

    Hvass, Kerli Kant

    2014-01-01

    Purpose – The purpose of this paper is to study the reuse and recycling of garments from the fashion industry's perspective. Through multiple case studies the paper maps the emerging organizational field of post-retail responsibility of garments, describing how and why several fashion companies......-back schemes. Originality/value – This paper contributes to research by advancing understanding of fashion industry's role in the end-of-life of their products and the associated opportunities and challenges. This study belongs to the first round of research that directly addresses the post-consumer textile...... and in-depth understanding. Findings – The findings demonstrate that post-retail responsibility of fashion is an emerging field in the fashion industry that offers several business opportunities to fashion companies, but also requires rethinking of existing value propositions and engagement of a wider...

  8. Translucency of Dental Ceramic, Post and Bracket

    Directory of Open Access Journals (Sweden)

    Yong-Keun Lee

    2015-10-01

    Full Text Available Translucency of dental ceramics, esthetic posts and orthodontic brackets was reviewed. Translucency parameter (TP and contrast ratio (CR are generally used for translucency evaluation. For the evaluation of translucency, two criteria such as the translucency of human teeth (TP = 15–19, 1 mm thick and the visual perceptibility threshold for the translucency difference (∆CR > 0.07 or ∆TP > 2 were used. In ceramics, translucency differences were in the perceptible range depending on the type of material and the thickness. However, variations caused by the difference in the required thickness for each layer by the material and also by the measurement protocols should be considered. As to the translucency of esthetic posts, a significant difference was found among the post systems. Translucency was influenced by the bracket composition and brand, and the differences by the brand were visually perceptible.

  9. Insulin sensitivity in post-obese women

    DEFF Research Database (Denmark)

    Toubro, S; Western, P; Bülow, J

    1994-01-01

    1. Both increased and decreased sensitivity to insulin has been proposed to precede the development of obesity. Therefore, insulin sensitivity was measured during a 2 h hyperinsulinaemia (100 m-units min-1 m-2) euglycaemic (4.5 mmol/l) glucose clamp combined with indirect calorimetry in nine weight......-1 kg-1, not significant). Basal plasma concentrations of free fatty acids were similar, but at the end of the clamp free fatty acids were lower in the post-obese women than in the control women (139 +/- 19 and 276 +/- 48 mumol/l, P = 0.02). 3. We conclude that the insulin sensitivity of glucose...... metabolism is unaltered in the post-obese state. The study, however, points to an increased antilipolytic insulin action in post-obese subjects, which may favour fat storage and lower lipid oxidation rate postprandially.(ABSTRACT TRUNCATED AT 250 WORDS)...

  10. 14 CFR 417.415 - Post-launch and post-flight-attempt hazard controls.

    Science.gov (United States)

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Post-launch and post-flight-attempt hazard controls. 417.415 Section 417.415 Aeronautics and Space COMMERCIAL SPACE TRANSPORTATION, FEDERAL AVIATION...-flight-attempt hazard controls. (a) A launch operator must establish, maintain and perform procedures...

  11. Hanford site post NPH building inspection plan

    Energy Technology Data Exchange (ETDEWEB)

    Wagenblast, G.R., Westinghouse Hanford

    1996-09-12

    This plan establishes consistent post-NPH building inspection procedures and defines a procedure for prioritization of buildings for inspection to ensure the safety of facilities prior to reentry. Qualification of systems for restart of operation is not included. This plan takes advantage, where possible, of existing national procedures for post-NPH inspection of buildings, of existing structural design and evaluation documentation of Hanford facilities, and current and proposed seismic instrumentation located throughout the Hanford site. A list of buildings, prioritized according to current building safety function and building vulnerability (without regard for or information about a damaging natural forces event) is provided.

  12. Post-operative delirium in elderly patients

    Directory of Open Access Journals (Sweden)

    B Vijayakumar

    2014-01-01

    Full Text Available Delirium is a common, but an often underdiagnosed complication in the elderly following major surgery. Recognising delirium in early stages and diagnosing the condition based on established criteria can improve the outcome and management. Managing delirium with environmental, supportive and pharmacological interventions will possibly reduce the incidence and side-effects associated with post-operative delirium. The purpose of this article is to provide an over view of the current knowledge about the disease, diagnosis, pathogenesis, preventive strategies, and treatment of post-operative delirium.

  13. The contemporary in post-medieval archaeology

    DEFF Research Database (Denmark)

    McAtackney, Laura; Penrose, Sefryn

    2016-01-01

    Contemporary archaeology is an emerging field of enquiry within the wider discipline associated with the questioning of temporal boundaries in what we study and why we engage with material remains of the recent past more generally. This article argues that contemporary archaeology should be broadly...... defined at this stage in its development and therefore can be located in Post-Medieval Archaeology through research that explicitly engages with what it is to conduct contemporary archaeology, but also through those implicitly considering how the past intrudes into the present. We believe that Post......-Medieval Archaeology will continue to highlight archaeological studies of the contemporary into the future....

  14. Post-post-Newtonian deflection of light ray in multiple systems with PPN parameters

    Institute of Scientific and Technical Information of China (English)

    Gong Yan-Xiang; Wu Xiao-Mei

    2011-01-01

    The post-Newtonian scheme in multiple systems with post-Newtonian parameters presented by Klioner and Soffel is extended to the post-post-Newtonian (PPN) order for light propagation problem in the solar system. Under considering the solar system experiment requirement, a new parameter e is introduced. This extension does not change the virtue of the scheme on the linear partial differential equations of the potential and vector potential mentioned in previous work. Furthermore, this extension is based on the former work done by Richter and Matzner in one global system theory. As an application, we also consider the deflection of light ray in the global coordinates. And the deflection angle of light ray is obtained with post-Newtonian parameters.

  15. The effect of friction in the hold down post spherical bearings on hold down post loads

    Science.gov (United States)

    Richardson, James A.

    1990-01-01

    The effect of friction at the connection of the Solid Rocket Booster (SRB) aft skirt and the mobile launch platform (MLP) hold down posts was analyzed. A simplified model of the shuttle response during the Space Shuttle Main Engine (SSME) buildup was constructed. The model included the effect of stick-slip friction for the rotation of the skirt about the spherical bearing. Current finite element models assume the joint is completely frictionless in rotation and therefore no moment is transferred between the skirt and the hold down posts. The model was partially verified against test data and preliminary parameter studies were performed. The parameter studies indicated that the coefficient of friction strongly influenced the moment on the hold down posts. The coefficient of friction had little effect on hold down post vertical loads, however. Further calibration of the model is necessary before the effect of friction on the hold down post horizontal loads can be analyzed.

  16. Split-resonator integrated-post MEMS gyroscope

    Science.gov (United States)

    Bae, Youngsam (Inventor); Hayworth, Ken J. (Inventor); Shcheglov, Kirill V. (Inventor)

    2004-01-01

    A split-resonator integrated-post vibratory microgyroscope may be fabricated using micro electrical mechanical systems (MEMS) fabrication techniques. The microgyroscope may include two gyroscope sections bonded together, each gyroscope section including resonator petals, electrodes, and an integrated half post. The half posts are aligned and bonded to act as a single post.

  17. Development of Norms for the Post-deployment Reintegration Scale

    Science.gov (United States)

    2010-09-01

    perspective. Recognizing the importance of successful post-deployment reintegration to optimal operational readiness, Canadian military researchers...of successful post-deployment reintegration to optimal operational readiness, Canadian military researchers developed the Army Post- Deployment... successful post-deployment reintegration to optimal operational readiness, and attempting to address the gaps and limitations of existing

  18. [Surgery of post-traumatic ptosis].

    Science.gov (United States)

    Morax, S; Baudoin, F; Hurbli, T

    1995-12-01

    Post-traumatic ptosis may be classified as follows: ptosis occurring during lid avulsion, ptosis associated with fractures of the orbital roof and with foreign bodies, post-contusional ptosis, cicatricial ptosis, neurogenic ptosis and post-surgical ptosis. The patient must be thoroughly examined, including examination of the eye-ball, extra-ocular muscles, eyelid and evaluation of upper eyelid levator function and orbital and facial examination. The various surgical methods proposed include levator muscle surgery, aponeurotic surgery, Müller's muscle surgery and frontalis suspension surgery. Surgical indications and choice of surgical method essentially depend on the anatomo-clinical forms. The general rule is to operate under local anesthesia to obtain better control of the muscular function. Some cases are simple to treat such as post-contusional ptosis with good levator function which allows functional surgery with excellent static and dynamic results. Other relatively simple cases with non functional levators may only be treated on a static basis. Last but not least are more difficult cases in which levator function is difficult to evaluate pre-operatively because of severe fibrosis. The aim in such cases is to explore the eyelid by an anterior approach under local anesthesia and to propose either muscular surgery or a frontalis suspension according to the anatomical and functional status of the levator muscle.

  19. Martha Lake Elementary School Post Occupancy Evaluation.

    Science.gov (United States)

    Washington Univ., Seattle. Center for Environment, Education and Design Studies.

    This post-occupancy evaluation of Martha Lake Elementary School in the Edmonds School District, Washington, was designed to answer questions in two areas: (1) "What aspects of the facility are effectively supporting learning and the current educational program? Conversely, which aspects, elements, or components of the facility appear to be…

  20. Post-Keynesian Theory: An Overview.

    Science.gov (United States)

    Kregel, J. A.

    1983-01-01

    The evolution and current position of post-Keynesian economic theory are examined. The theory is based on Keynes' exposition of effective demand in a monetary production economy determining the level of employment, rather than through supply and demand in the "real" and "monetary" sectors determining the level of real output. (Author/RM)

  1. Purification of post-consumer steel crap

    NARCIS (Netherlands)

    Rem, P.C.; Van den Broeck, F.; Bakker, M.C.M.

    2012-01-01

    Post-consumer steel scrap is often hand picked for contaminants such as copper to meet specifications of steelmakers. If the hand sorting capacity exceeds 20 tons scrap/h the efficiency generally becomes problematic, leaving 50% of the copper contaminants in the steel product. In response, new techn

  2. Travel websites: Changing visits, evaluations and posts

    NARCIS (Netherlands)

    Bronner, F.; de Hoog, R.

    2016-01-01

    Many studies concerning the role of web-based information in tourism measure one-time interactions. This paper presents results of a longitudinal study. Data collected in 2014 about website visits, evaluations and posts, are compared with data from 2007. The main finding is the advance of sites havi

  3. Post-Secondary Expectations and Educational Attainment

    Science.gov (United States)

    Sciarra, Daniel T.; Ambrosino, Katherine E.

    2011-01-01

    This study utilized student, teacher, and parent expectations during high school to analyze their predictive effect on post-secondary education status two years after scheduled graduation. The sample included 5,353 students, parents and teachers who participated in the Educational Longitudinal Study (ELS; 2002-2006). The researchers analyzed data…

  4. Post-traumatic unilateral plantar hyperhidrosis.

    Science.gov (United States)

    Eren, Y; Yavasoglu, N G; Comoglu, S S

    2016-02-01

    Localized unilateral hyperhidrosis is rare and poorly understood, sometimes stemming from trauma. Feet, quite vulnerable to trauma are affected by disease-mediated plantar hyperhidrosis, usually bilaterally. This report describes partial hyperhidrosis developing post-traumatically on the left plantar region of a 52-year-old male.

  5. Dietary macronutrient recommendations for optimal recovery post ...

    African Journals Online (AJOL)

    Enrique

    place post-exercise, a positive nitrogen balance is needed in order to allow for ... however, an upper limit for protein ingestion has been set at. 2 g/kg BW/day ... conditions. The drinks ...... exercise during heat stress in men and women. Med Sci ...

  6. Kazakh Literature of Post-socialist Realism

    Directory of Open Access Journals (Sweden)

    Zhansaya Zharylgapov

    2013-01-01

    Full Text Available The article studies innovative trends in the Kazakh literature of 1960s, influenced by totalitarianism for a long time, analyses ideological and aesthetic concepts, contrary to socialist realism, dominating at that time, indicates the ways of modernist aesthetics development in works of the post-socialist period, determines features of new characters in literature

  7. Post Colonial Perspectives on Education Policy Research

    Science.gov (United States)

    van der Westhuizen, Gert J.

    2013-01-01

    The focus of this article is on the role and contribution of policy research in contexts of social transformation. With reference to education transformation policies in post-apartheid South Africa, the argument is developed that research studies vary in their contribution to change, as a function of the paradigmatic assumptions and methodological…

  8. Post stapedotomy aviation: A changing scenario.

    Science.gov (United States)

    Rajguru, Renu

    2014-01-01

    Aeromedical implications of stapedotomy like rapid barometric changes and G forces are generally thought to put an end to the aviation career of an aviator. Aviation industry has grown tremendously in the last few decades, and aviation now is not only occupational but also recreational. The Indian Military Aviation rules state that, "Stapedectomy cases will be assessed permanently unfit for flying duties. These cases will be cautioned against flying in an unpressurised aircraft." The basis of this is the aeromedical concerns associated with stapedotomy as clinical conditions which are of minor significance on the ground may become aggravated in the air. With an ever expanding civil and military aviation industry, the number of aviators who have undergone stapedotomy has also increased. Though grounding the aircrew is the safest option, but if medical certification is denied to all, then the majority who can fly safely will also be excluded, thus denying the organization of its trained resources. This paper discusses post otosclerosis and post stapedotomy aeromedical concerns, reviews existing literature concerning post stapedotomy aviation and various post stapedotomy aviation policies.

  9. Measurement of post-void residual urine

    NARCIS (Netherlands)

    Asimakopoulos, Anastasios D.; De Nunzio, Cosimo; Kocjancic, Ervin; Tubaro, Andrea; Rosier, Peter F.; Finazzi-Agrò, Enrico

    2016-01-01

    Aims To present the teaching module "Measurement of Post-void residual urine." Methods This module has been prepared by a Working Group of the ICS Urodynamics Committee. The methodology used included comprehensive literature review, consensus formation by the members of the Working Group, and review

  10. Preliminary concept Post-Piledriver Exploratory Program

    Energy Technology Data Exchange (ETDEWEB)

    Nordyke, M. D.

    1966-10-13

    This is the concept for a series of post-shot investigations at the Piledriver site, Area 15, Nevada Test Site (NTS), to gain information on: Chimney geometry and associated wall rock conditions resulting from a deeply buried (1500 ft) nuclear explosion in granite; The characteristics and distribution of rubble and radioactivity in the chimney; and Data pertinent to in-situ leaching.

  11. Defining post-stroke pain: diagnostic challenges

    NARCIS (Netherlands)

    Roosink, Meyke; Geurts, Alexander C.H.; IJzerman, Maarten J.

    2010-01-01

    Recently, a new grading system for central post-stroke pain (CPSP) was proposed, which might be used to distinguish patients with stroke who have central neuropathic pain from patients who have peripheral pain. Accordingly, for a CPSP diagnosis, all other causes of pain have to be excluded. Although

  12. Proactive Policing by Post and Community Officers

    Science.gov (United States)

    Famega, Christine N.

    2009-01-01

    Using data collected through social observations of 188 police officer shifts, the current research examines the time allocated to proactive and reactive activities by traditional and community police officers to assess (a) the extent to which post officers engage in proactive activities, (b) whether these activities differ from the (proactive)…

  13. The Post-Ureteroscopic Lesion Scale (PULS)

    DEFF Research Database (Denmark)

    Schoenthaler, Martin; Buchholz, Noor; Farin, Erik

    2014-01-01

    The Post-Ureteroscopic Lesion Scale (PULS) offers a simple grading system for the description of ureteral lesions after ureteroscopy. In this article, we present the results of a video-based multicenter evaluation of the inter-rater reliability of clinically important PULS grades 0-3....

  14. Post-Release Success among Paroled Lifers

    Directory of Open Access Journals (Sweden)

    Marieke Liem

    2014-12-01

    Full Text Available Previous research suggests that social relations, in particular the forming of family ties and employment (social factors, self-efficacy (personal factors, and therapeutic interventions (institutional factors constitute main contributors in post-release success. These studies, however, have largely been based on general delinquents serving relatively short prison terms. This study aims to shed light on the influence of social, personal, and institutional factors on post-release success versus failure among paroled lifers. We conducted in-depth life-history interviews with 64 individuals who had served a life sentence, who were either re-incarcerated for another crime or parole violation, or were currently out on parole. The role of social factors in desistance among long-term incarcerated offenders was minimal. Rather, self-efficacy appeared to be a key element in post-release success. These findings suggest that research based on short-term incarcerated offenders cannot be directly translated to long-term incarcerated offenders. This group does not experience the same traditional turning points, such as establishing family ties and employment. Accordingly, long-term prisoners may go through a different process post-release that determines their success versus failure compared to general delinquents who serve shorter sentences.

  15. SMAP Post-launch Field Campaign Planning

    Science.gov (United States)

    The SMAP post-launch Cal/Val activities are intended both to assess the quality of the mission products and to support analyses that lead to their improvement. A suite of complementary methodologies will be employed that will result in a robust global assessment. Much of the work will occur in the C...

  16. Iron incorporation and post-malaria anaemia

    Science.gov (United States)

    Iron supplementation is employed to treat post-malarial anaemia in environments where iron deficiency is common. Malaria induces an intense inflammatory reaction that stalls reticulo-endothelial macrophagal iron recycling from haemolysed red blood cells and inhibits oral iron absorption, but the mag...

  17. Adolescent Post-Traumatic Stress Disorder

    Science.gov (United States)

    Yule, William

    2003-01-01

    Based on over a decade of work in the area of PTSD, including a longitudinal study of PTSD among adolescents, Dr. Yule provides an introduction to post-traumatic stress disorder as it occurs in youth. This includes a look at the manifestations of stress reactions, the incidence and prevalence of PTSD, and the relationship between levels of…

  18. Post-Keynesian Theory: An Overview.

    Science.gov (United States)

    Kregel, J. A.

    1983-01-01

    The evolution and current position of post-Keynesian economic theory are examined. The theory is based on Keynes' exposition of effective demand in a monetary production economy determining the level of employment, rather than through supply and demand in the "real" and "monetary" sectors determining the level of real output.…

  19. Post stapedotomy aviation: A changing scenario

    Directory of Open Access Journals (Sweden)

    Renu Rajguru

    2014-01-01

    Full Text Available Aeromedical implications of stapedotomy like rapid barometric changes and G forces are generally thought to put an end to the aviation career of an aviator. Aviation industry has grown tremendously in the last few decades, and aviation now is not only occupational but also recreational. The Indian Military Aviation rules state that, "Stapedectomy cases will be assessed permanently unfit for flying duties. These cases will be cautioned against flying in an unpressurised aircraft." The basis of this is the aeromedical concerns associated with stapedotomy as clinical conditions which are of minor significance on the ground may become aggravated in the air. With an ever expanding civil and military aviation industry, the number of aviators who have undergone stapedotomy has also increased. Though grounding the aircrew is the safest option, but if medical certification is denied to all, then the majority who can fly safely will also be excluded, thus denying the organization of its trained resources. This paper discusses post otosclerosis and post stapedotomy aeromedical concerns, reviews existing literature concerning post stapedotomy aviation and various post stapedotomy aviation policies.

  20. The Post 9/11 English Teacher

    Science.gov (United States)

    English Journal, 2005

    2005-01-01

    An English teacher offers his thoughts on what they could learn about their role in the post 9/11-world and suggests reflecting on the events of the incident as professionals. The 9/11 Commission Report defines an important role for education and recommends US funding to improve public education, vocational education, and halving adult illiteracy…

  1. Imaging the post-operative meniscus

    Energy Technology Data Exchange (ETDEWEB)

    Toms, Andoni P. [Department of Radiology, Norfolk and Norwich University Hospital, Colney Lane, Norwich, Norfolk NR4 7UY (United Kingdom)]. E-mail: andoni.toms@nnuh.nhs.uk; White, Lawrence M. [Department of Medical Imaging, University of Toronto, Mount Sinai Hospital and the University Health Network, 600 University Avenue, Toronto, Ont., M5G 1X5 (Canada); Marshall, Thomas J. [Department of Radiology, Norfolk and Norwich University Hospital, Colney Lane, Norwich, Norfolk NR4 7UY (United Kingdom); Donell, Simon T. [Institute of Health, University of East Anglia, Norwich, Norfolk NR4 7TJ (United Kingdom)

    2005-05-01

    Considerable developments have occurred in meniscal surgery, and consequently in the imaging of post-operative menisci, over the last 15 years. A drive to preserve meniscal physiologic function for as long as possible, in order to delay osteoarthrosis, has resulted in limited partial meniscectomies, meniscal repairs and meniscal transplants. Each of these techniques affects the imaging appearance of the meniscus, reducing the accuracy of conventional MRI in predicting recurrent tears. The specificity of conventional MRI can be improved by employing at least two T2-weighted sequences, but this still leaves a shortfall in sensitivity. In an attempt to increase the diagnostic accuracy of cross-sectional imaging, MR arthrography (MRA) and CT arthrography (CTA), have been applied to the post-operative meniscus. Sensitivities and specificities for these two techniques approach 90% in predicting recurrent meniscal tears. In the setting of clinical symptoms and gross meniscal deficiency, meniscal allografts are being transplanted with increasing frequency. In these transplants meniscal degeneration, fragmentation and separation are common findings, but the role of imaging in the management of these patients has not yet been well defined. This review explores the imaging techniques available for the evaluation of the post-operative meniscus, their strengths and weaknesses, and the reasons that they may find a place in a rational strategy for imaging of the symptomatic post-operative knee.

  2. Early Detection of Post-Stroke Depression

    NARCIS (Netherlands)

    de Man - van Ginkel, J.M.

    2012-01-01

    In the first two years after stroke approximately one-third of the patients suffer from depression, also referred to as post-stroke depression (PSD). Patients with PSD suffer from symptoms, such as a diminished interest or pleasure (anhedonia), depressed mood, sleep disturbances, loss of energy,

  3. Post-mortem CT-coronary angiography

    DEFF Research Database (Denmark)

    Pøhlsgaard, Camilla; Leth, Peter Mygind

    2007-01-01

    post-mortem coronary angiography and computerized tomography.  We describe how to prepare and inject the contrast medium, and how to establish a CT-protocol that optimizes spatial resolution, low contrast resolution and noise level. Testing of the method on 6 hearts, showed that the lumen...

  4. The Post-9/11 Risk Agenda.

    Science.gov (United States)

    Franke, Ann H.

    2002-01-01

    Seeks to place the post-9/11 risk agenda for colleges and universities in historical perspective by offering a refresher on some of the most serious perennial risks for U.S. higher education. Offers an eight-point road map of how to enhance boards' risk management efforts. (EV)

  5. Intrastromal crosslinking in post-LASIK ectasia.

    Science.gov (United States)

    Moscovici, Bernardo Kaplan; Campos, Mauro

    2014-01-01

    We describe a case of early post-LASIK ectasia detected in the first 6 months after surgery. The patient was treated by means of intrastromal corneal crosslinking under the flap, without de-epithelialization, which resulted in a positive outcome. At the time of writing, 2 years after the procedure, the patient remained free of progression.

  6. Whiplash and post-traumatic stress disorder

    NARCIS (Netherlands)

    Jaspers, JPC

    1998-01-01

    Purpose : This study examined the comorbidity of whiplash and post-traumatic stress disorder (PTSD) following motor vehicle accidents. A treatment strategy in cases with both disorders is proposed. Method: A review of the literature on psychological consequences of motor vehicle accidents and on ris

  7. Resistance to cyclic loading of teeth restored with posts

    DEFF Research Database (Denmark)

    Sahafi, A; Peutzfeldt, A; Ravnholt, G

    2005-01-01

    This in vitro study evaluated the effect of presence of post, presence of core, and of shape, type, and surface treatment of posts on resistance to cyclic loading of crowned human teeth. For all teeth, crowns designed without ferrule were cast in sterling silver and luted with resin cement (Panavia...... F). Each tooth underwent cyclic loading of 600 N at two loads per second until failure. Teeth that had only been crowned showed significantly higher resistance to cyclic loading than teeth with cores or with post and cores. No significant differences were found between teeth restored with cores only...... or with post and cores, irrespective of surface-treatment of the posts. Teeth restored with parallel-sided cast post (ParaPost XP) and cores showed significantly higher resistance to cyclic loading than teeth with either tapered cast posts or untreated prefabricated posts of titanium alloy (ParaPost XH...

  8. Context specificity of post-error and post-conflict cognitive control adjustments.

    Directory of Open Access Journals (Sweden)

    Sarah E Forster

    Full Text Available There has been accumulating evidence that cognitive control can be adaptively regulated by monitoring for processing conflict as an index of online control demands. However, it is not yet known whether top-down control mechanisms respond to processing conflict in a manner specific to the operative task context or confer a more generalized benefit. While previous studies have examined the taskset-specificity of conflict adaptation effects, yielding inconsistent results, control-related performance adjustments following errors have been largely overlooked. This gap in the literature underscores recent debate as to whether post-error performance represents a strategic, control-mediated mechanism or a nonstrategic consequence of attentional orienting. In the present study, evidence of generalized control following both high conflict correct trials and errors was explored in a task-switching paradigm. Conflict adaptation effects were not found to generalize across tasksets, despite a shared response set. In contrast, post-error slowing effects were found to extend to the inactive taskset and were predictive of enhanced post-error accuracy. In addition, post-error performance adjustments were found to persist for several trials and across multiple task switches, a finding inconsistent with attentional orienting accounts of post-error slowing. These findings indicate that error-related control adjustments confer a generalized performance benefit and suggest dissociable mechanisms of post-conflict and post-error control.

  9. Cryptococcal meningitis post autologous stem cell transplantation.

    Science.gov (United States)

    Chaaban, S; Wheat, L J; Assi, M

    2014-06-01

    Disseminated Cryptococcus disease occurs in patients with defective T-cell immunity. Cryptococcal meningitis following autologous stem cell transplant (SCT) has been described previously in only 1 patient, 4 months post SCT and while off antifungal prophylaxis. We present a unique case of Cryptococcus meningitis pre-engraftment after autologous SCT, while the patient was receiving fluconazole prophylaxis. A 41-year-old man with non-Hodgkin's lymphoma underwent autologous SCT. Post-transplant prophylaxis consisted of fluconazole 400 mg daily, levofloxacin 500 mg daily, and acyclovir 800 mg twice daily. On day 9 post transplant, he developed fever and headache. Peripheral white blood cell count (WBC) was 700/μL. Magnetic resonance imaging of the brain showed lesions consistent with meningoencephalitis. Cerebrospinal fluid (CSF) analysis revealed a WBC of 39 with 77% lymphocytes, protein 63, glucose 38, CSF pressure 20.5 cmH2 O, and a positive cryptococcal antigen. CSF culture confirmed Cryptococcus neoformans. The patient was treated with liposomal amphotericin B 5 mg/kg intravenously daily, and flucytosine 37.5 mg/kg orally every 6 h. He was switched to fluconazole 400 mg daily after 3 weeks of amphotericin therapy, with sterilization of the CSF with negative CSFCryptococcus antigen and negative CSF culture. Review of the literature revealed 9 cases of cryptococcal disease in recipients of SCT. Median time of onset was 64 days post transplant. Only 3 meningitis cases were described; 2 of them after allogeneic SCT. Fungal prophylaxis with fluconazole post autologous SCT is recommended at least through engraftment, and for up to 100 days in high-risk patients. A high index of suspicion is needed to diagnose and treat opportunistic infections, especially in the face of immunosuppression and despite adequate prophylaxis. Infection is usually fatal without treatment, thus prompt diagnosis and therapy might be life saving.

  10. PROBLEMS AND CHALLENGES OF INDIAN POST IN FINANCIAL INCLUSION

    OpenAIRE

    Mala, M.; Vasanthi, Dr. G.

    2016-01-01

    Financial inclusion means connecting all individuals, who are in the remote rural areas, to a well-functioning financial system. During post liberalization period the Indian post offices are providing banking services to the all section of people of the society since 1882. Indian post served Indian villagers as banker much before financial inclusion become buzzword and Indian post claims to be the pioneer of financial inclusion in India. The paper aims to focus on utilizing the India Post Off...

  11. Post-Slavery? Post-Segregation? Post-Racial? A History of the Impact of Slavery, Segregation, and Racism on the Education of African Americans

    Science.gov (United States)

    Span, Christopher M.

    2015-01-01

    This chapter details how slavery, segregation, and racism impacted the educational experiences of African Americans from the colonial era to the present. It argues that America has yet to be a truly post-slavery and post-segregation society, let alone a post-racial society.

  12. Post-Slavery? Post-Segregation? Post-Racial? A History of the Impact of Slavery, Segregation, and Racism on the Education of African Americans

    Science.gov (United States)

    Span, Christopher M.

    2015-01-01

    This chapter details how slavery, segregation, and racism impacted the educational experiences of African Americans from the colonial era to the present. It argues that America has yet to be a truly post-slavery and post-segregation society, let alone a post-racial society.

  13. Disability and the post-2015 development agenda.

    Science.gov (United States)

    Tardi, Rachele; Njelesani, Janet

    2015-01-01

    The article considers the extent to which disability has been recognized and included in two main documents produced to date as part of the United Nations Post-2015 Development agenda process. This is the process that is defining the Sustainable Development Goals (SDGs), which will succeed the UN Millennium Development Goals (MDGs) after the latter reach their target date in 2015. The two documents examined in the article are the Outcome Document (July 2014) of the Open Working Group (OWG) on SDGs and the Report (August 2014) of the Intergovernmental Committee of Experts on Sustainable Development Financing (ICESDF). The OWG consisted of 30 seats shared by 70 UN Member States and was in charge of proposing goals and targets for the SDGs. The ICESDF worked in parallel to the OWG and its report proposed options on an effective financing strategy. The article emphasizes the importance of including persons with disabilities in the Post-2015 Agenda, especially in view of the latter's overarching focus on eradicating poverty. The inclusion of persons with disabilities is being recognized in the Post-2015 Agenda discussions as central to achieving sustainable development. Disability has been explicitly mentioned in the OWG and ICESDF documents. Although the results so far have been very good, more work still needs to be done to ensure that these explicit references are maintained in the final version of the SDGs, which will be adopted in September 2015. Furthermore, the new framework needs to have a stronger human rights foundation on which to ground these references and future indicators. Light for the World is an international confederation of national development non-governmental organizations (NGOs) aiming at an inclusive society, where the rights of persons with disabilities are realized without discrimination. Through a rights-based approach, Light for the World supports 175 programs in 25 countries in the areas of prevention of blindness, rehabilitation, inclusive

  14. Honing the message: post-transcriptional and post-translational control in attaching and effacing pathogens.

    Science.gov (United States)

    Bhatt, Shantanu; Romeo, Tony; Kalman, Daniel

    2011-05-01

    Bacteria evolve their capacity to cause disease by acquiring virulence genes that are usually clustered in discrete genetic modules termed pathogenicity islands (PAI). Stable integration of PAIs into pre-existing transcriptional networks coordinates expression from PAIs with ancestral genes in response to diverse environmental cues. Such transcriptional controls are evident in the regulation of the locus of enterocyte effacement (LEE), a PAI of enteropathogenic and enterohemorrhagic Escherichia coli. However, recent reports indicate that global post-transcriptional and post-translational regulators, including CsrA, Hfq and ClpXP, fine-tune the transcriptional output from the LEE. In this opinion article, we highlight recent advances in the understanding of post-transcriptional and post-translational regulation in attaching and effacing pathogens.

  15. Post-editing through Speech Recognition

    DEFF Research Database (Denmark)

    Mesa-Lao, Bartolomé

    In the past couple of years automatic speech recognition (ASR) software has quietly created a niche for itself in many situations of our lives. Nowadays it can be found at the other end of customer-support hotlines, it is built into operating systems and it is offered as an alternative text......-input method for smartphones. On another front, given the significant improvements in Machine Translation (MT) quality and the increasing demand for translations, post-editing of MT is becoming a popular practice in the translation industry, since it has been shown to allow for larger volumes of translations...... to be produced saving time and costs. The translation industry is at a deeply transformative point in its evolution and the coming years herald an era of converge where speech technology could make a difference. As post-editing services are becoming a common practice among language service providers and speech...

  16. Post-mortal lesions in freshwater environment.

    Science.gov (United States)

    Vanin, Stefano; Zancaner, Silvano

    2011-10-10

    Postmortem animal feeding activity may cause considerable damage to bodies resulting in the modification of wounds, loss of identifying features and injury. Certain postmortem lesions may appear inflicted or non-inflicted antemortem injuries. At present, apart from cases in sea water, no data are available about post mortal lesions performed by aquatic organisms. This note that represents the first report concerning colonisation of a dead body by crustaceans a few hours after death, describes injuries caused by the amphipod Niphargus elegans on the face, and in particular on the eye region, of a young man dead by drowning. The lesions recorded in this case are comparable with the lesions caused by ants. The high plasticity in the food choice can allow Amphipoda to colonise drowning bodies in every moment after dead, however the benthonic behaviour of these animals suggests a more important role in the colonisation during post-mortem submersion periods.

  17. Alternative solvents for post combustion carbon capture

    Directory of Open Access Journals (Sweden)

    Udara S. P. R. Arachchige, Morten C. Melaaen

    2013-01-01

    Full Text Available The process model of post combustion chemical absorption is developed in Aspen Plus for both coal and gas fired power plant flue gas treating. The re-boiler energy requirement is considered as the most important factor to be optimized. Two types of solvents, mono-ethylamine (MEA and di-ethylamine (DEA, are used to implement the model for three different efficiencies. The re-boiler energy requirement for regeneration process is calculated. Temperature and concentration profiles in absorption column are analyzed to understand the model behavior. Re-boiler energy requirement is considerably lower for DEA than MEA as well as impact of corrosion also less in DEA. Therefore, DEA can be recommended as a better solvent for post combustion process for carbon capture plants in fossil fuel fired power industries.

  18. Management performance warehousing in PE 'Post Serbia'

    Directory of Open Access Journals (Sweden)

    Vidović Dragana R.

    2016-01-01

    Full Text Available The paper presents a general model for the strategic management of postal infrastructure and resources, focused on development of warehousing service. The model was developed according to the characteristics of the public enterprise 'Pošte Srbije'. A set of indicators is developed for the purpose of analysis of external and internal environment of PE 'Post Serbia'. For positioning the focal postal enterprise among other, selected European posts, the benchmarking method is used, whereby indicators are determined by using eigenvalues and eigenvectors. Analysis of internal environment additionally includes survey and Delphi method to obtain the values of coefficients in the model. With small modifications, the model could be applicable to all postal operators and logistics companies which consider to develop warehouse service in logistics market.

  19. POST PANCREATITIS SMA SYNDROME : A CASE REPORT

    Directory of Open Access Journals (Sweden)

    Ritesh M

    2015-05-01

    Full Text Available Superior mesenteric artery (SMA syndrome is a rare acquired disorder in which acute angulation of SMA causes compression of the third part of the duodenum between the SMA and the aorta, leading to obstruction. Loss of fatty tissue as a result of a variet y of debilitating conditions is believed to be the etiologic factor causing the acute angulation. Conditions like increased spinal lordosis, application of a body cast, short ligament of Treitz or unusually low origin of SMA may also precipitate this syndr ome. The diagnosis of SMA syndrome is based on clinical symptoms and radiologic evidence of obstruction. SMA syndrome has been described after rapid or severe weight loss in conditions such as cancer or extensive burn injuries, prolonged bed rest, anorexia , or malabsorption syndromes. Herewith we are reporting a case of post pancreatitis SMA syndrome. KEYWORDS: Post pancreatitis SMA syndrome; superior mesenteric artery syndrome; SMA syndrome.

  20. New Post-Collision Line Design

    CERN Document Server

    Gatignon, Lau

    2014-01-01

    The 1.5 TeV Compact Linear Collider (CLIC) beams, with a total power of 14 MW per beam, are disrupted at the interaction point due to the very strong beam-beam effect. As a result, some 3.5 MW reach each main dump in form of beamstrahlung photons. About 0.5 MW of e+e- pairs with a very broad energy spectrum need to be disposed of along the post-collision line while separating the various beams by charge for beam diagnostics purposes. The Post-collision line has been optimised in order to reduce radiation damage to magnets, the number of magnets required and the stray fields to the incoming beam line.

  1. Post-Inflationary Gravitino Production Revisited

    CERN Document Server

    Ellis, John; Nanopoulos, Dimitri V; Olive, Keith A; Peloso, Marco

    2016-01-01

    We revisit gravitino production following inflation. As a first step, we review the standard calculation of gravitino production in the thermal plasma formed at the end of post-inflationary reheating when the inflaton has completely decayed. Next we consider gravitino production prior to the completion of reheating, assuming that the inflaton decay products thermalize instantaneously while they are still dilute. We then argue that instantaneous thermalization is in general a good approximation, and also show that the contribution of non-thermal gravitino production via the collisions of inflaton decay products prior to thermalization is relatively small. Our final estimate of the gravitino-to-entropy ratio is approximated well by a standard calculation of gravitino production in the post-inflationary thermal plasma assuming total instantaneous decay and thermalization at a time $t \\simeq 1.2/\\Gamma_\\phi$. Finally, in light of our calculations, we consider potential implications of upper limits on the gravitin...

  2. The CLIC Post-Collision Line

    CERN Document Server

    Gschwendtner, E; Elsener, K; Sailer, A; Uythoven, J; Appleby, R B; Salt, M; Ferrari, A; Ziemann, V

    2010-01-01

    The 1.5 TeV CLIC beams, with a total power of 14 MW per beam, are disrupted at the interaction point due to the very strong beam-beam effect. As a result, some 3.5 MW reach the main dump in form of beamstrahlung photons. About 0.5 MW of e+e- pairs with a very broad energy spectrum need to be disposed of along the post-collision line. The conceptual design of this beam line will be presented. Emphasis will be on the optimization studies of the CLIC post-collision line design with respect to the energy deposition in windows, dumps and absorbers, on the design of the luminosity monitoring for a fast feedback to the beam steering and on the background conditions for the luminosity monitoring equipment.

  3. CLIC Post-Collision Line Luminosity Monitoring

    CERN Document Server

    Appleby, R B; Deacon, L; Geschwendtner, E

    2011-01-01

    The CLIC post collision line is designed to transport the un-collided beams and the products of the collided beams with a total power of 14MW to the main beam dump. Full Monte Carlo simulation has been done for the description of the CLIC luminosity monitoring in the post collision line. One method of the luminosity diagnostic is based on the detection of high energy muons produced by beamstrahlung photons in the main beam dump. The disrupted beam and the beamstrahlung photons produce at the order of 106 muons per bunch crossing per cm2, with energies higher than 10 GeV. Threshold Cherenkov counters are considered after the beam dump for the detection of these high energy muons. Another method for luminosity monitoring is presented using the direct detection of the beamstrahlung photons.

  4. Teflon injections in post-prostatectomy incontinence

    DEFF Research Database (Denmark)

    Osther, P J; Røhl, H F

    1988-01-01

    Twenty-five males with post-prostatectomy incontinence due to sphincter damage underwent transperineal or transurethral Teflon injections. The results were classified into three grades: good, moderate, and poor. Good or moderate results were obtained in 24%. No major immediate complications...... or longterm side-effects were observed. This intervention is associated with a minimum of discomfort for the patient and hospitalization can be limited to 48-72 hours. The results are not so good as those obtained in female incontinence, and the procedure cannot be recommended as first choice treatment...... in patients with post-prostatectomy incontinence, but because of the simplicity of the procedure, it is considered to be a valuable alternative in patients not suitable for prosthetic surgery....

  5. Alternative solvents for post combustion carbon capture

    Energy Technology Data Exchange (ETDEWEB)

    Arachchige, Udara S.P.R. [Telemark University College, Porsgrunn (Norway); Melaaen, Morten C. [Telemark University College, Porsgrunn (Norway); Tel-Tek, Porsgrunn (Norway)

    2013-07-01

    The process model of post combustion chemical absorption is developed in Aspen Plus for both coal and gas fired power plant flue gas treating. The re-boiler energy requirement is considered as the most important factor to be optimized. Two types of solvents, mono-ethylamine (MEA) and di-ethylamine (DEA), are used to implement the model for three different efficiencies. The re-boiler energy requirement for regeneration process is calculated. Temperature and concentration profiles in absorption column are analyzed to understand the model behavior. Re-boiler energy requirement is considerably lower for DEA than MEA as well as impact of corrosion also less in DEA. Therefore, DEA can be recommended as a better solvent for post combustion process for carbon capture plants in fossil fuel fired power industries.

  6. Permanent post-partum hypothyroidism. Seven cases

    Energy Technology Data Exchange (ETDEWEB)

    Houdent, C.; Pellenc, P.; Carrara Balacheff, O.; Kuhn, J.M.; Leclerc, P.; Wolf, L.M. (CHU de Rouen, Hopital de Boisguillaume, 76 (France)); Cavelier, B. (Centre de Transfusion Sanguine, 76 - Boisguillaume (France))

    1985-02-09

    Seven cases of hypothyroidism developed within 6 months of delivery are reported. Radioimmunoassays regularly showed very low thyroxin levels and high thyroid-stimulating hormone levels, thus confirming that the thyroid deficiency was of peripheral origin. A significant rise in antimicrosomial or antithyroglobulin antibodies was noted in 5 cases. One patient had HLA-B8 and 4 had HLA-DR3, which was not significantly different from the prevalence in the regional population. In contrast with the transient post-partum hypothyroidism reported mainly in Japan, the condition proved to be permanent in 6 patients followed up for more than two years. The increased frequency of HLA-DR3 and 5 recently described in thyroiditis with transient post-partum thyrotoxicosis was not found in our series. It would appear that pregnancy, which is a period of immune incompetence, may disclose a latent lymphocytic thyroiditis.

  7. Post-Translational Modifications of TRP Channels

    Directory of Open Access Journals (Sweden)

    Olaf Voolstra

    2014-04-01

    Full Text Available Transient receptor potential (TRP channels constitute an ancient family of cation channels that have been found in many eukaryotic organisms from yeast to human. TRP channels exert a multitude of physiological functions ranging from Ca2+ homeostasis in the kidney to pain reception and vision. These channels are activated by a wide range of stimuli and undergo covalent post-translational modifications that affect and modulate their subcellular targeting, their biophysical properties, or channel gating. These modifications include N-linked glycosylation, protein phosphorylation, and covalent attachment of chemicals that reversibly bind to specific cysteine residues. The latter modification represents an unusual activation mechanism of ligand-gated ion channels that is in contrast to the lock-and-key paradigm of receptor activation by its agonists. In this review, we summarize the post-translational modifications identified on TRP channels and, when available, explain their physiological role.

  8. Beyond the answer: post-error processes.

    Science.gov (United States)

    Kleiter, G D; Schwarzenbacher, K

    1989-08-01

    When you suspect that you just gave an erroneous answer to a question you stop and rethink. Suspected errors lead to a shift in the control and content of cognitive processes. In the present experiment we investigated the influence of errors upon heart rates and response latencies. Sixty-four subjects participated in an experiment in which each subject solved a sequence of 60 verbal analogies. The results demonstrated increased latencies after errors and decelerated heart rates during the post-error period. The results were explained by a psychophysiological model in which the septo-hippocampal system functions as a control system which coordinates the priority and selection of cognitive processes. Error detection suppresses strategies which otherwise prevent looping and iterative reanalyses of old material. The inhibition is also responsible for the cardiac slowing during the post-error period.

  9. Post-exceptionalism in public policy

    DEFF Research Database (Denmark)

    Daugbjerg, Carsten; Feindt, Peter H.

    2017-01-01

    Framing the special issue on the transformation of Food and Agricultural Policy, this article introduces the concept of post-exceptionalism in public policies. The analysis of change in agri-food policy serves as a generative example to conceptualize current transformations in sectoral policy...... arrangements in democratic welfare states. Often these arrangements have been characterized by an exceptionalist ideational framework that legitimizes a sector’s special treatment through compartmentalized, exclusive and producer-centered policies and politics. In times of internationalization of policy......-making, increasing interlinkage of policy areas and trends towards self-regulation, liberalization and performance-based policies, policy exceptionalism is under pressure to either transform or give way to (neo-)liberal policy arrangements. Post-exceptionalism denotes a partial transformation of exceptionalist ideas...

  10. Focus on the post-DVD formats

    Science.gov (United States)

    He, Hong; Wei, Jingsong

    2005-09-01

    As the digital TV(DTV) technologies are developing rapidly on its standard system, hardware desktop, software model, and interfaces between DTV and the home net, High Definition TV (HDTV) program worldwide broadcasting is scheduled. Enjoying high quality TV program at home is not a far-off dream for people. As for the main recording media, what would the main stream be for the optical storage technology to meet the HDTV requirements is becoming a great concern. At present, there are a few kinds of Post-DVD formats which are competing on technology, standard and market. Here we give a review on the co-existing Post-DVD formats in the world. We will discuss on the basic parameters for optical disk, video /audio coding strategy and system performance for HDTV program.

  11. Tracheobronchomalacia post-pneumonectomy: A late complication

    Directory of Open Access Journals (Sweden)

    Ashima Datey

    2013-01-01

    Full Text Available An 83-year-old male presented with dyspnoea and stridor. He had undergone pneumonectomy 40 years ago. CT scan revealed gross shift of mediastinum (post-pneumonectomy syndrome with tortuous trachea kinked at the thoracic inlet. Fibre optic bronchoscopy showed a near total expiratory closure of trachea, right main bronchus, and segmental bronchi confirming tracheobronchomalacia. He was managed with long length, low tracheostomy in view of his poor general condition of permitting more invasive procedures. He showed adequate clinical improvement and was discharged home. Tracheobronchomalacia in post-pneumonectomy syndrome requires emergent management. Its occurrence after 40 years is very rare and may be easily missed. It can be diagnosed with dynamic CT and FOB. Although invasive management with stenting or surgical methods is routinely advised, conservative care can be effective in selected cases.

  12. The LHC Post-mortem System

    CERN Document Server

    Ciapala, Edmond; Schmidt, R; Wenninger, J

    2002-01-01

    The energy stored in the beam and the magnets of the LHC is of unprecedented scale compared to other existing accelerators. The LHC machine is protected from an uncontrolled release of this energy by a large number of interlock channels. The LHC machine interlock system manages the interlock conditions and has as main task to trigger safe extraction of the energy stored in the electrical circuits and in the beams. To operate the machine in the presence of such a large interlock system requires powerful diagnostics to trace back the origin of power and beam related problems. This diagnostics tool, called herein the post-mortem system, has the role of organizing the collection and analysis of transient data recorded around a beam or power abort by all relevant LHC equipment systems. A first conceptual design of the LHC post-mortem system is presented in this document together with the main requirements for the LHC equipment systems.

  13. Post Traumatic Glioma – An association questioned

    Directory of Open Access Journals (Sweden)

    Chaurasia I.D.

    2015-03-01

    Full Text Available Post traumatic glioma has been a matter of debate. Few reports favor its occurrence in previous head injury scar, subsequently developing into glioma. Here we report a case of young patient presented with headache, seizures and gradual loss of vision. On investigation found to have brain tumor. Patient had head injury occurred 3 yrs back. It fulfills all the criteria required to establish traumatic origin, further supporting the association.

  14. Survey of post polio syndrome in Tehran

    OpenAIRE

    Talebian S; Olyaei GR; Moosavi Ghomi S

    2009-01-01

    "nBackground: The long-term effects of poliomyelitis are known in many of countries. In despite of one accrue title for these signs and symptoms; there are similarity aspects in patients' problems. In the signs of explained, absence of strength and endurance, musculoskeletal difficulties, respiratory dysfunction, sleep disorders are more generalized. Prevalence of post polio syndrome (PPS) is aim of this study. "nMethods: 150 subjects with history of poliomyelitis (80 male and ...

  15. Post operatory analgesia in caesarean surgery.

    Directory of Open Access Journals (Sweden)

    Bárbara Lucía Cabezas Poblet

    2003-12-01

    Full Text Available Background: Post-operatory pain is a spread and constant problem during the care of the surgical patient. The tendency to find new therapeutic techniques to alleviate pain has lead scientists to make and use a great variety of analgesics which are administered by different vias. The effects of narcotics on the new born are well known and the author´s worries about this problem has been the motivational point to search about the use of epidural and intratecal narcotics in the obstetric patient. Objective: To assess the use of peridural liophilized morphine in the Caesarean Section Method: A study of a series of cases was carried out at the Surgical Unit of the Gynecobstetric service of the University Hospital ¨Dr. Gustavo Aldereguía Lima¨ from February 2001 to August 2002 . This search included 120 patient who were selected to elective iterative caesarean section The variables under study were blood pressure, pulse and respiration during the pre- trans and post operative phases, onset of the anaesthetic effect and its duration, peri operatory complications , quality of the post operatory analgesia and its effect on the newborn measured by using Apgar values . The statistical procedure was developed by using the statistical package Epi Info 6. Results: The onset of the anesthetic effect and the duration of the anesthesia were not modified with the use of liophilized morphine. Vital signs remained within normal limits in most of the patients during the pre- trans and post operatory phases. The complications were: pruritus, urinary retention, nausea nad vomiting. The quality of the analgesia was satisfactory in most of the patients. The Apgar values were normal in all neonates. Conclusion: The administration of peridural liophilized morphine in elective caesarean sections is a reliable, sure and useful method in our environment.

  16. Financial Services for Post-Quake Reconstruction

    Institute of Scientific and Technical Information of China (English)

    Li Zhen

    2008-01-01

    @@ The May 12 earthquake in Sichuan caught Chinese people by surprise and took the nation's heart.While mourning the dead and searching for the missing,many services must be provided for the survivors in the wake of the earth quake.Available post-quake financial services have become an important part of the reconstruction effort in the disaster stricken areas of Sichuan province.

  17. Post-operative delirium in elderly patients

    OpenAIRE

    Vijayakumar, B.; Elango, P; Ganessan, R

    2014-01-01

    Delirium is a common, but an often underdiagnosed complication in the elderly following major surgery. Recognising delirium in early stages and diagnosing the condition based on established criteria can improve the outcome and management. Managing delirium with environmental, supportive and pharmacological interventions will possibly reduce the incidence and side-effects associated with post-operative delirium. The purpose of this article is to provide an over view of the current knowledge ab...

  18. SOME ASPECTS OF POST-QUANTUM CRYPTOSYSTEMS*

    Directory of Open Access Journals (Sweden)

    Avtandil Gagnidze

    2017-02-01

    Full Text Available The article describes alternatives to RSA system, resistant to quantum attacks. There are described Hash-based Digital Signature Schemes and McEliece system, based on the theory of algebraic coding. We analyzed their advantages and disadvantages, and considered some of the attacks on these systems. It is shown that today we are not prepared to transfer cryptosystems to post-quantum era.

  19. BAROQUE AND POST-MODERNITY: SENSITIVITIES DUALIST

    Directory of Open Access Journals (Sweden)

    Alcimar Nascimento da Silva

    2005-07-01

    Full Text Available This article intends to discuss the link between the Baroque and post-modernity, the latter intended as the period of cultural history that the most influential intellectuals believe we are living in the present. Will highlight all the features of both, considering especially their convergence, ethics and aesthetics. To this end, the scenario outlines of each of these styles in particular, considering possible dialogue between them.

  20. PHMC post-NPH emergency response training

    Energy Technology Data Exchange (ETDEWEB)

    Conrads, T.J.

    1997-04-08

    This document describes post-Natural Phenomena Hazard (NPH) emergency response training that was provided to two teams of Project Hanford Management Contractors (PHMC) staff that will be used to assess potential structural damage that may occur as a result of a significant natural phenomena event. This training supports recent plans and procedures to use trained staff to inspect structures following an NPH event on the Hanford Site.