Sample records for stamping dies press

  1. An intelligent system for selection of die-set of metal stamping press tool

    Microsoft Academic Search

    S. Kumar; R. Singh

    2005-01-01

    Die-set selection is an important activity in the process of press tool design. Traditional methods of optimal selection of the die-set involve numerous calculations and decisions based on experience and practice codes. This paper describes an intelligent system for selection of die-set of metal stamping press tool. A production rule based expert system approach has been utilized to develop an

  2. Evolutions of Advanced Stamping CAE - Technology Adventures and Business Impact on Automotive Dies and Stamping

    Microsoft Academic Search

    2005-01-01

    In the past decade, sheet metal forming and die development has been transformed to a science-based and technology-driven engineering and manufacturing enterprise from a tryout-based craft. Stamping CAE, especially the sheet metal forming simulation, as one of the core components in digital die making and digital stamping, has played a key role in this historical transition. The stamping simulation technology

  3. Evolutions of Advanced Stamping CAE — Technology Adventures and Business Impact on Automotive Dies and Stamping

    Microsoft Academic Search

    2005-01-01

    In the past decade, sheet metal forming and die development has been transformed to a science-based and technology-driven engineering and manufacturing enterprise from a tryout-based craft. Stamping CAE, especially the sheet metal forming simulation, as one of the core components in digital die making and digital stamping, has played a key role in this historical transition. The stamping simulation technology

  4. Sheet metal stamping die design for warm forming

    Microsoft Academic Search

    Amit K

    2003-01-01

    In metal stamping dies, by taking advantage of improved material flow by selectively warming the die, flat sections of the die can contribute to the flow of material throughout the workpiece. Local surface heating can be accomplished by placing a heating block in the die. Distribution of heating at the flat lower train central regions outside of the bend region

  5. Stamping Die Strip Optimization for Paired Parts

    Microsoft Academic Search

    V. Vamanu; T. J. Nye

    In stamping, operating costs are dominated by raw material costs, which can typically reach 75% of total costs in a stamping facility. In this paper, a new algorithm is described that determines stamping strip layouts for pairs of parts such that the layout optimizes material utilization efficiency. This algorithm predicts the jointly-optimal blank orientation on the strip, relative positions of

  6. Impact of Simulation Technology on Die and Stamping Business

    NASA Astrophysics Data System (ADS)

    Stevens, Mark W.

    2005-08-01

    Over the last ten years, we have seen an explosion in the use of simulation-based techniques to improve the engineering, construction, and operation of GM production tools. The impact has been as profound as the overall switch to CAD/CAM from the old manual design and construction methods. The changeover to N/C machining from duplicating milling machines brought advances in accuracy and speed to our construction activity. It also brought significant reductions in fitting sculptured surfaces. Changing over to CAD design brought similar advances in accuracy, and today's use of solid modeling has enhanced that accuracy gain while finally leading to the reduction in lead time and cost through the development of parametric techniques. Elimination of paper drawings for die design, along with the process of blueprinting and distribution, provided the savings required to install high capacity computer servers, high-speed data transmission lines and integrated networks. These historic changes in the application of CAE technology in manufacturing engineering paved the way for the implementation of simulation to all aspects of our business. The benefits are being realized now, and the future holds even greater promise as the simulation techniques mature and expand. Every new line of dies is verified prior to casting for interference free operation. Sheet metal forming simulation validates the material flow, eliminating the high costs of physical experimentation dependent on trial and error methods of the past. Integrated forming simulation and die structural analysis and optimization has led to a reduction in die size and weight on the order of 30% or more. The latest techniques in factory simulation enable analysis of automated press lines, including all stamping operations with corresponding automation. This leads to manufacturing lines capable of running at higher levels of throughput, with actual results providing the capability of two or more additional strokes per minute. As we spread these simulation techniques to the balance of our business, from blank de-stacking to the racking of parts, we anticipate continued reduction in lead-time and engineering expense while improving quality and start-up execution. The author will provide an overview of technology and business evolution of the math-based process that brought an historical transition and revitalization to the die and stamping industry in the past decade. Finally, the author will give an outlook for future business needs and technology development directions.

  7. Simulation of Stamping Process of Automotive Panel Considering Die Deformation

    Microsoft Academic Search

    Y. T. Keum; I. H. Ahn; I. K. Lee; M. H. Song; S. O. Kwon; J. S. Park

    2005-01-01

    In order to see the effect of die deformation on the forming of sheet metals, the draw-ins, strains, and spring-backs of an automotive fender panels are numerically simulated considering the die deformation, which is found by the simultaneous structural analysis of press and dies. By coupling the forming analysis and the structural analysis, the die deformation is simultaneously taken into

  8. ELID grinding characteristics of large stamping die for Wolter mirror.

    PubMed

    Yin, Shaohui; Ohmori, Hitoshi; Liu, Qing; Morita, Shinnya; Chen, Fengjun; Asami, Muneaki; Fan, Yufeng

    2009-01-01

    An ultra-precision ELID grinding of large stamping dies of Wolter mirror for X-ray telescope was presented in this paper. The large stamping dies (S55C) with confocal paraboloid and hyperboloid was ground by ELID arc-enveloped grinding. In this ELID grinding system, cast iron fiber bonded (CIFB) diamond wheels were controlled by 3-dimentional ways to scan the work-piece and generate required surfaces. Its grinding characteristics such as attainable form accuracy, surface roughness were investigated. Furthermore, some measures to improve form accuracy were discussed and verified such as truing, compensating, and on-machine measuring. PMID:19893217

  9. Wear at the die radius in sheet metal stamping

    Microsoft Academic Search

    Michael P. Pereira; Wenyi Yan; Bernard F. Rolfe

    In sheet metal stamping, it is known that wear is unevenly distributed over the die radius and that multiple wear mechanisms may occur simultaneously. However, there has been little or no work that details the types of wear mechanisms, and quantifies the locations at which they occur. Furthermore, the link between recently identified time-dependent contact conditions and the wear response

  10. Simulation of Stamping Process of Automotive Panel Considering Die Deformation

    NASA Astrophysics Data System (ADS)

    Keum, Y. T.; Ahn, I. H.; Lee, I. K.; Song, M. H.; Kwon, S. O.; Park, J. S.

    2005-08-01

    In order to see the effect of die deformation on the forming of sheet metals, the draw-ins, strains, and spring-backs of an automotive fender panels are numerically simulated considering the die deformation, which is found by the simultaneous structural analysis of press and dies. By coupling the forming analysis and the structural analysis, the die deformation is simultaneously taken into account in the forming process. Furthermore, for the consideration of load difference transferred among the upper die, punch, and blank holder due to the changes in sheet thickness, the gap elements are employed instead of the blank sheet in the structural analysis. The numerical simulation results of an automotive fender draw panel are compared with the measurements. The comparison of the forming and spring-back analysis results between the rigid die and the deformed die shows that the deformed tool provides more accurate forming and spring-back prediction.

  11. Advanced Line Die Forming Simulation Technology and Its Impact on Stamping Automotive Body Panels

    NASA Astrophysics Data System (ADS)

    Zhang, Jimmy; Wang, Chuantao; Xu, Siguang; Joshi, Ramesh; Goan, Norman

    2005-08-01

    Line die forming simulation and validation create tremendous business values for automotive die developments and production stamping while they pose a great technological challenge to stamping CAE community. GM Manufacturing Engineering Die Center has developed an integrated line die analysis technology to validate die lines as a productionized business process. In this process, a finished stamping body panel can be streamline analyzed with required time, accuracy, and quality. This paper presents critical issues in line die analysis, discusses technical challenges in production applications and software development, and finally demonstrates the impact of line die forming simulation and validations on automotive body styling and tooling developments.

  12. Bacterial Printing Press that Regenerates Its Ink: Contact-Printing Bacteria Using Hydrogel Stamps

    E-print Network

    Prentiss, Mara

    Bacterial Printing Press that Regenerates Its Ink: Contact-Printing Bacteria Using Hydrogel Stamps. In Final Form: March 9, 2005 This paper describes the use of micropatterned agarose stamps prepared agarose stamps were inked with suspensions of bacteria; these stamps generated patterns of bacteria

  13. A knowledge-based blackboard framework for stamping process planning in progressive die design

    Microsoft Academic Search

    S. B. Tor; G. A. Britton; W. Y. Zhang

    2005-01-01

    It is widely accepted that stamping process planning for the strip layout is a key task in progressive die design. However, stamping process planning is more of an art rather than a science. This is in spite of recent advances in the field of artificial intelligence, which have achieved a lot of success in incorporating built-in intelligence and applying diverse

  14. A study on the computer-aided measuring integration system for the sheet metal stamping die

    Microsoft Academic Search

    Chen-Hua She; Chun-Cheng Chang; Yung-Chou Kao; Hsin-Yu Cheng

    2006-01-01

    In this paper, based on the requirements of the design and manufacturing characteristics, a CAD-based CMM (coordinate measuring machine) software and analysis system for the sheet metal stamping die is developed. The system can analyze the NURBS die surface model in IGES format and generate the measuring program in DMIS format as well as the probe path simulation. Moreover, the

  15. A mechanics model for sheet-metal stamping using deformable dies

    Microsoft Academic Search

    L. C. Zhang

    1995-01-01

    This paper studied the deformation mechanisms of sheet metals stamped by rigid punches and deformable dies. Emphasis was placed on the development of elastic plastic zones in the sheet workpieces, on the functions of the die parameters and on their correlations with spring-back. It was found that the reduction of spring-back was due mainly to the interface interaction offered by

  16. An analytical solution to springback of sheet metals stamped by a rigid punch and an elastic die

    Microsoft Academic Search

    L. C. Zhang; Z. Lin

    1997-01-01

    Springback is one of the fundamental factors affecting the quality of a stamped component. It has been recognised that springback can be controlled more easily when using an elastic die in a stamping process. However, the deformation of the die introduces more complex mechanisms of springback and an in-depth understanding of such processes is still lacking. This paper developed an

  17. Die shape design optimization of sheet metal stamping process using meshfree method

    Microsoft Academic Search

    Nam Ho Kim; Kyung Kook Choi; Jiun Shyan Chen

    2001-01-01

    SUMMARY A die shape design sensitivity analysis (DSA) and optimization for a sheet metal stamping process is proposed based on a Lagrangian formulation. A hyperelasticity-based elastoplastic material model is used for the constitutive relation that includes a large deformation e:ect. The contact condition between a workpiece and a rigid die is imposed through the penalty method with a modi

  18. Stamp InformatIon Please check your selection -All stamps are shown exact size.

    E-print Network

    Stamp InformatIon Please check your selection - All stamps are shown exact size. Extra ItEmS Stamp Ink (6 cc) Stamp Ink (2 oz) Replacement Die Replacement Stamp Pad Signature Stamp QuantIty:________ Stamp Word

  19. Draw-in Map - A Road Map for Simulation-Guided Die Tryout and Stamping Process Control

    Microsoft Academic Search

    Jimmy J. Zhang; Norman Goan

    2005-01-01

    Sheet metal forming is a displacement or draw-in controlled manufacturing process in which a flat blank is drawn into die cavity to form an automotive body panel. Draw-in amount is the single most important stamping manufacturing index that controls all forming characteristics (strains, stresses, thinning, etc.), stamping failures (splits, wrinkles, surface distortion, etc.) and line die operations and automations. Draw-in

  20. Draw-in Map — A Road Map for Simulation-Guided Die Tryout and Stamping Process Control

    NASA Astrophysics Data System (ADS)

    Wang, Chuantao (C. T.); Zhang, Jimmy J.; Goan, Norman

    2005-08-01

    Sheet metal forming is a displacement or draw-in controlled manufacturing process in which a flat blank is drawn into die cavity to form an automotive body panel. Draw-in amount is the single most important stamping manufacturing index that controls all forming characteristics (strains, stresses, thinning, etc.), stamping failures (splits, wrinkles, surface distortion, etc.) and line die operations and automations. Draw-in Map is engineered for math-based die developments via advanced stamping simulation technology. Then the Draw-in Map is provided to die makers in plants as a road map for math-guided die tryout in which the die tryout workers follow the engineered tryout conditions and matches the engineered draw-in amount so that the tryout time and cost are greatly reduced, and quality is ensured. The Map can also be used as a math-based trouble-shooting tool to identify the causes of formability problems in stamping production. The engineered Draw-in Map has been applied to all draw die tryout for all GM vehicle programs since 1998. A minimum 50% reduction in both lead-time and cost and significant improvement in panel quality in tryout have been reported. This paper presents the concept and process to apply the engineered Draw-in Map in die tryout.

  1. Computer Aided Design of Die Surface with Three-Dimensional Free-Form Surface for Sheet Metal Stamping

    Microsoft Academic Search

    Takahiro Makiyama; Toshiya Teramae; Toshimi Sato

    2011-01-01

    In sheet metal stamping, springback decreases forming accuracy. To increase the forming accuracy, the shape of the die surface is generally compensated manually by trial-and-error. Compensating the die surface with a three-dimensional free-form surface is difficult because the details need to be determined: (i) how to evaluate the shape difference between the formed shape and the design shape, and (ii)

  2. Experimental and Numerical Studies on the Formability of Materials in Hot Stamping and Cold Die Quenching Processes

    Microsoft Academic Search

    N. Li; M. S. Mohamed; J. Cai; J. Lin; D. Balint; T. A. Dean

    2011-01-01

    Formability of steel and aluminium alloys in hot stamping and cold die quenching processes is studied in this research. Viscoplastic-damage constitutive equations are developed and determined from experimental data for the prediction of viscoplastic flow and ductility of the materials. The determined unified constitutive equations are then implemented into the commercial Finite Element code Abaqus\\/Explicit via a user defined subroutine,

  3. Solution of boundary heat transfer coefficients between hot stamping die and cooling water based on FEM and optimization method

    NASA Astrophysics Data System (ADS)

    Li, Huiping; He, Lianfang; Zhang, Chunzhi; Cui, Hongzhi

    2015-06-01

    The thermal physical parameters have significant effects on the calculation accuracy of physical fields, and the boundary heat transfer coefficient between the die and water is one of the most important thermal physical parameters in the hot stamping. In order to attain the boundary heat transfer coefficient, the testing devices and test procedures are designed according to the characteristic of heat transfer in the hot stamping die. A method of estimating the temperature-dependent boundary heat transfer coefficient is presented, and an inverse heat conduction software is developed based on finite element method, advance-retreat method and golden section method. The software is used to calculate the boundary heat transfer coefficient according to the temperatures measured by NiCr-NiSi thermocouples in the experiment. The research results show that, the convergence of the method given in the paper is well, the surface temperature of sample has a significant effect on the boundary heat transfer coefficient between the die and water. The boundary heat transfer coefficient increases as the surface temperature of sample reduces, and the variation is nonlinear.

  4. Accurate Die Design for Automotive Panel Stamping Considering the Compensation Related with Die Deflection and Blank Thinning

    NASA Astrophysics Data System (ADS)

    Chen, Jun; Xu, Dongkai; Xia, Guodong; Li, Xifeng; Chen, Jieshi; Zhang, Jian; Yan, Wei; Li, Yue

    2011-08-01

    In order to improve assembly accuracy, automotive body panels have to be fabricated with higher dimensional and surface quality requirements, therefore the die faces should be designed more accurately to consider more relevant factors. In the presented study, we proposed algorithms to realize the following functions: through forming process simulation, the thinning distribution on the deformed blank was extracted as first kind of compensation; through die structural CAE analysis which automatically mapped the boundary contact forces onto the die surfaces from process simulation results, the die deflection was calculated as second kind of compensation. These two quantitative contributions were added together to compensate the die face. The proposed methodologies were programmed and integrated with LS-Dyna and HyperWorks, and also integrated with Autoform and CATIA linear CAE functionalities separately. In addition, a software toolkit to calculate the contacting ratio was also developed to evaluate the effectiveness of die face compensation. The second toolkit developed was verified by an automotive structural part forming die design, through die compensation and geometric optimization, the predicted contact ratio between the die face and formed blank was improved a lot, and the first toolkit was testified by a fender drawing die design. It shows that the die face compensation can be realized and integrated seamlessly between CAD model, process simulation model and die structural CAE model with the help of data I/O tools developed by the authors.

  5. Experimental and Numerical Studies on the Formability of Materials in Hot Stamping and Cold Die Quenching Processes

    SciTech Connect

    Li, N.; Mohamed, M. S.; Cai, J.; Lin, J.; Balint, D.; Dean, T. A. [Department of Mechanical Engineering, Imperial College London, London, SW7 2AZ (United Kingdom)

    2011-05-04

    Formability of steel and aluminium alloys in hot stamping and cold die quenching processes is studied in this research. Viscoplastic-damage constitutive equations are developed and determined from experimental data for the prediction of viscoplastic flow and ductility of the materials. The determined unified constitutive equations are then implemented into the commercial Finite Element code Abaqus/Explicit via a user defined subroutine, VUMAT. An FE process simulation model and numerical procedures are established for the modeling of hot stamping processes for a spherical part with a central hole. Different failure modes (failure takes place either near the central hole or in the mid span of the part) are obtained. To validate the simulation results, a test programme is developed, a test die set has been designed and manufactured, and tests have been carried out for the materials with different forming rates. It has been found that very close agreements between experimental and numerical process simulation results are obtained for the ranges of temperatures and forming rates carried out.

  6. Experimental and Numerical Studies on the Formability of Materials in Hot Stamping and Cold Die Quenching Processes

    NASA Astrophysics Data System (ADS)

    Li, N.; Mohamed, M. S.; Cai, J.; Lin, J.; Balint, D.; Dean, T. A.

    2011-05-01

    Formability of steel and aluminium alloys in hot stamping and cold die quenching processes is studied in this research. Viscoplastic-damage constitutive equations are developed and determined from experimental data for the prediction of viscoplastic flow and ductility of the materials. The determined unified constitutive equations are then implemented into the commercial Finite Element code Abaqus/Explicit via a user defined subroutine, VUMAT. An FE process simulation model and numerical procedures are established for the modeling of hot stamping processes for a spherical part with a central hole. Different failure modes (failure takes place either near the central hole or in the mid span of the part) are obtained. To validate the simulation results, a test programme is developed, a test die set has been designed and manufactured, and tests have been carried out for the materials with different forming rates. It has been found that very close agreements between experimental and numerical process simulation results are obtained for the ranges of temperatures and forming rates carried out.

  7. Monitoring and Diagnosis of Sheet Metal Stamping Processes

    Microsoft Academic Search

    R. Du

    Sheet metal stamping is one of the most commonly used manufacturing processes. Every day, millions of parts are made by stamping,\\u000a ranging from small battery caps to large automobile body panels. Yet, it is a difficult process involving the press, the dies\\u000a (including the binder), the material (the blank) and the forming process with very large forces. Even with advanced

  8. A hybrid tool buy-off decision policy for automotive sheet metal stamping dies

    Microsoft Academic Search

    Karl D. Majeske; David W. Glenn

    2007-01-01

    In most cases, manufacturers follow a net build strategy for process development. Functional build represents an integrated approach to product and process development developed by automotive body manufacturers due to the non-rigid nature of sheet metal stampings. This paper proposes a hybrid approach that combines both net build and functional build approaches which results in lower costs than using either

  9. 32 UniPress 155/2012 Wagemutig an die Spitze

    E-print Network

    Richner, Heinz

    32 UniPress 155/2012 Wagemutig an die Spitze Ein besonderer Erfolg des NFS Klima ist die Nach Nationaler Forschungsschwerpunkt (NFS) Klima32 UniPress 155/2012 Mit gerade mal 32 Jahren wurde Olivia Martius vor zwei Jahren zur Professorin für Klimafolgenforschung im Alpenraum gewählt. #12;33UniPress 155

  10. Accurate Die Design for Automotive Panel Stamping Considering the Compensation Related with Die Deflection and Blank Thinning

    Microsoft Academic Search

    Jun Chen; Dongkai Xu; Guodong Xia; Xifeng Li; Jieshi Chen; Jian Zhang; Wei Yan; Yue Li

    2011-01-01

    In order to improve assembly accuracy, automotive body panels have to be fabricated with higher dimensional and surface quality requirements, therefore the die faces should be designed more accurately to consider more relevant factors. In the presented study, we proposed algorithms to realize the following functions: through forming process simulation, the thinning distribution on the deformed blank was extracted as

  11. Contact pressure evolution at the die radius in sheet metal stamping

    Microsoft Academic Search

    Michael P. Pereira; John L. Duncan; Wenyi Yan; Bernard F. Rolfe

    2009-01-01

    The contact conditions at the die radius are of primary importance to the wear response for many sheet metal forming processes. In particular, a detailed understanding of the contact pressure at the wearing interface is essential for the application of representative wear tests, the use of wear resistant materials and coatings, the development of suitable wear models, and for the

  12. Developments in Die Pressing Strategies for Low-Cost Titanium Powders

    SciTech Connect

    Hovanski, Yuri; Weil, K. Scott; Lavender, Curt A.

    2009-05-01

    Recent developments in the production of low-cost titanium powders have rejuvenated interest in manufacturing titanium powder metallurgy components by direct press and sinter techniques. However excessive friction typically observed during titanium powder pressing operations leads to numerous problems ranging from non-homogeneous green densities of the compacted powder to excessive part ejection forces and reduced die life due to wear and galling. An instrumented double-acting die press was developed to both investigate the mechanics of titanium powder pressing (particularly for the new low-cost powder morphologies) and to screen potential lubricants that could reduce frictional effects. As will be discussed, the instrument was used to determine friction coefficients and to evaluate a number of candidate lubricants. These results were then used to optimize the lubricant system to reduce die-wall stresses and improve part density uniformity.

  13. Fabrication of aligned microstructures with a single elastomeric stamp

    E-print Network

    Chen, Christopher S.

    Fabrication of aligned microstructures with a single elastomeric stamp Joe Tien, Celeste M. Nelson elastomeric stamp by mapping each photomask onto distinct heights on the surface of the stamp. Pressing the stamp against a surface collapses the topography of the stamp such that each recessed layer contacts

  14. A numerical and experimental approach to optimise sheet stamping technologies

    Microsoft Academic Search

    Giuseppe Sala

    2001-01-01

    The development of press-formed sheetmetal components often implies long trial-and-error processes for die set-up. This leads to excessive costs in the case of low production rates (aerospace field) and protracted development phases when tight times-to-market are compulsory (automotive and appliances fields). This paper presents a numerical procedure, validated by experimental tests, devoted to optimising the stamping processes and aimed at

  15. Integrated Forming Simulations and Die Structural Analysis for Optimal Die Designs

    Microsoft Academic Search

    Venkat Aitharaju; Malcolm Liu; Jennifer Dong; Jimmy Zhang; Chuan-Tao Wang

    2005-01-01

    After gaining a huge success in applying stamping simulations and formability analysis to validate die face developments, GM moves forward to winning total manufacturability in stamping process. Of which, ensuring die structure integrity and minimizing weight is one of the important initiatives. Stamping die design (or solid modeling of stamping dies) was traditionally conducted by following the die design manuals

  16. Process planning and NC-code generation in manufacturing of press dies for production of car bodies

    Microsoft Academic Search

    Dongmok Sheen; Chang Ho Lee; Sang Do Noh; Kiwoo Lee

    2004-01-01

    This paper presents a process planning system that generates process plans and NC codes for machining of press dies, which are used in manufacturing the body panels of cars. This system consists of three modules: a macro-process planning system that generates process plans for major parts of press dies; an operation planning system that generates operation plans and NC codes

  17. Evaluation of the Pressing Characteristics of Commercially Pure Titanium Using an Instrumented Double Acting Die

    SciTech Connect

    Hovanski, Yuri; Lavender, Curt A.; Weil, K. Scott

    2008-06-19

    With recent advances in synthesizing titanium powder by low-cost routes, there has been growing interest in identifying process/material conditions that overcome the powder compaction problems typically found with this reactive metal. The use of instrumented dies in studying the cold pressing process for commercial iron and steel powders has provided greater insight into the complex phenomena that occur and may be used to evaluate constitutive relations that describe the compaction process. Nevertheless, little work has been conducted on the special, more problematic case of reactive metal powders such as titanium. An instrumented die was developed that allows die wall friction to be characterized and the radial stress distribution along the die wall and throughout the compact to be monitored. As will be presented, this tool has been used to investigate titanium compaction and to draw comparisons with results obtained on a baseline commercial iron powder. Both sets of data were systematically collected using various powder/die lubrication combinations.

  18. Sensitivity Analysis of the Sheet Metal Stamping Processes Based on Inverse Finite Element Modeling and Monte Carlo Simulation

    Microsoft Academic Search

    Maolin Yu; R. Du

    2005-01-01

    Sheet metal stamping is one of the most commonly used manufacturing processes, and hence, much research has been carried for economic gain. Searching through the literatures, however, it is found that there are still a lots of problems unsolved. For example, it is well known that for a same press, same workpiece material, and same set of die, the product

  19. Stamp Collecting for Novices a Brief Booklist Top Choices for Beginners

    E-print Network

    Mathis, Wayne N.

    Stamp Collecting for Novices ­ a Brief Booklist Top Choices for Beginners Encyclopedia of United States stamps and stamp collecting / / Rodney A. Juell & Steven J. Rod, editors United States Stamp: Amick, George Imprint: Sidney, OH: Amos Press, c1986. Linn's complete stamp collecting basics

  20. Feature-based metal stamping part and process design. Part II: stamping process planning

    Microsoft Academic Search

    Dunbing Tang; Benhe Gao

    2007-01-01

    In metal stamping development, stamping process planning plays quite an important role for the related die design. As mentioned in Part-I [Feature-based metal stamping part and process design. Part 1: stampability evaluation, 2007, 45, 2673–2695], the feature can encapsulate comprehensive engineering information; this paper proposes to realize stamping process planning based on feature mapping. A feature mapping system, between a

  1. Analysis of Stamping Production Data with view towards Quality Bernard Rolfe1*

    E-print Network

    Webb, Geoff

    1 Analysis of Stamping Production Data with view towards Quality Management Bernard Rolfe1* , Yakov at Ford Geelong Stamping Plant on a press line that was fitted with standard press sensors to measure press and binder force over the stamping cycle for each panel. The quality of randomly sampled panels

  2. Microstructure and properties of nano-TiN modified Ti(C,N)-based cermets fabricated by powder injection molding and die pressing

    NASA Astrophysics Data System (ADS)

    Yi, Shan-jie; Yin, Hai-qing; Chen, Ke; Khan, Dil-Faraz; Zheng, Qing-jun; Qu, Xuan-hui

    2013-11-01

    Powder injection molding (PIM) and die pressing were employed to fabricate nano-TiN modified Ti(C,N)-based cermets. The shrinkage behavior, microstructure, porosity, and mechanical properties of the samples with and without nano-TiN addition fabricated by PIM and die pressing were analyzed. It is demonstrated that for either PIM or die pressing, the porosities are obviously reduced, the mechanical properties are significantly improved after adding nano-TiN, and the hard particles are refined; the rim phase thickness obviously becomes thinner, and the number of dimples in fracture also increases. Compared the samples fabricated by die pressing, it is difficult for PIM to obtain dense Ti(C,N)-based cermets. Due to the too much existence of pores and isolated carbon, the mechanical properties of the sintered samples by PIM are inferior to those of the sintered ones by die pressing.

  3. Qualitative and quantitative cost analysis for sheet metal stamping

    Microsoft Academic Search

    Dunbing Tang; Walter Eversheim; Günther Schuh

    2004-01-01

    This research paper presents a qualitative and quantitative cost analysis system for sheet metal stamping development at an early design stage. First, the authors identify problems in the traditional metal stamping part and die development processes and outline the need for performance of concurrent stamping part design in order to achieve cost effectiveness that accommodates the concept of concurrent engineering.

  4. A computerized diagraph and matrix approach for evaluation of metal stamping layouts

    Microsoft Academic Search

    Rajender Singh; G. S. Sekhon

    1996-01-01

    The cost of a component manufactured by metal stamping is mainly due to the strip material, the stamping operations and the die. An optimal strip-layout helps to minimize the overall cost of the component by minimizing wastage of the strip material. This paper presents a strip-layout selection methodology pertaining to metal die stamping work in complex layout situations. The method

  5. Die \\

    Microsoft Academic Search

    Harald Braun

    Zu Einfluß und Wirkung Jahns Zwei herausragende Historiker des 19. Jahrhunderts, Georg Gottfried Gervinus und Heinrich von Treitschke, haben Friedrich Ludwig Jahn nicht nur rundweg eine eigenständige politische Denkfähigkeit abgesprochen, sondern auch Jahns Persönlichkeit und seine politisch- gesellschaftlichen Aktivitäten - insbesondere die von ihm gegründete und geleitete frühe Turnbewegung - durch eine Vielzahl von Negativurteilen gründlich diskreditiert. Mehrere Generationen von

  6. Synchronized time stamp support

    Microsoft Academic Search

    Kowalkowski

    1994-01-01

    New software has been added to IOC core to maintain time stamps. The new software has the ability to maintain time stamps over all IOCs on a network. The purpose of this paper is to explain how EPICS will synchronize the time stamps. In addition, this paper will explain how to configure and use the new EPICS time stamp support

  7. Design of Hot Stamping Tools with Cooling System

    Microsoft Academic Search

    H. Hoffmann; H. So; H. Steinbeiss

    2007-01-01

    Hot stamping with high strength steel is becoming more popular in automotive industry. In hot stamping, blanks are hot formed and press hardened in a water-cooled tool to achieve high strength. Hence, design of the tool with necessary cooling significantly influences the final properties of the blank and the process time. In this paper a new method based on systematic

  8. STAMPing into Mitochondria

    PubMed Central

    Yoo, Seong Keun; Cheong, JaeHun; Kim, Hye Young

    2014-01-01

    Six transmembrane protein of prostate 2 (STAMP2) is a protein that has been extensively studied due to its association with prostate cancer. Currently, STAMP2 is well known for its critical role in metabolism and modulating inflammatory signals. Even so, the molecular mechanism of STAMP2 activity and its downstream effectors are still largely unknown. Here, we review the current knowledge of STAMP2, and suggest possible explanations for some of its less well-understood features. A few studies suggest that STAMP2 may interact with mitochondria. Considering STAMP2 functions as a potential component of mitochondrial biology may yield valuable insight into this protein. PMID:24643198

  9. DUCK STAMPS WILDLIFE REFUGES

    E-print Network

    DUCK STAMPS AND WILDLIFE REFUGES UNITED STATES DEPARTMENT OF THE INTERIOR FISH AND WILDLIFE SERVICE. In this category was the National Elk Refuge in Jackson Hole, Wyo. Cover: Design for the first Duck Stamp. Opposite

  10. PAM-STAMP in the simulation of stamping process of an automotive component

    Microsoft Academic Search

    I. A. Choudhury; O. H. Lai; L. T. Wong

    2006-01-01

    The present study focuses on the stamping process simulation of automotive component using PAM-STAMPTM simulation software. A die geometry of an automotive component has been simulated in this study. Safe limit of blank holder forces have been identified with respect to different parametric conditions. Plain carbon steel, reinforced steel and aluminum alloys have been used as the work materials for

  11. Stamping axisymmetric forgings

    Microsoft Academic Search

    V. N. Peretyat’ko; A. V. Bakhaev; M. V. Filippova; S. A. Vakhman

    2009-01-01

    As a rule, cylindrical blanks are used in hot bulk stamping of axisymmetric parts. However, cutting the rod into measured lengths is associated with fluctuation in mass of the blank on account of distortion of its end geometry and change in its length. Therefore, seams arise in the stamping of such blanks. A promising approach to the deformation of axisymmetric

  12. Food Stamps: A Bibliography.

    ERIC Educational Resources Information Center

    Cameron, Colin; And Others

    A voluminous body of literature exists on the topic of food stamps including the administration of the federal and state programs and the question of abuses and fraud. This bibliography describes a portion of that material in print. An introduction provides general information and a chronology of the food stamp program and comments on the place of…

  13. An agent-based collaborative design system to facilitate active diemaker involvement in stamping part design

    Microsoft Academic Search

    Dunbing Tang

    2004-01-01

    This paper reports on a collaborative design environment to facilitate active die-maker involvement in metal stamping product development. First, the role of die-maker in the metal stamping development process chain is analyzed comprehensively. The author takes the view that the die-maker should be involved in new product development processes as early as possible to enable concurrent engineering practice in metal

  14. Trends and developments in the automation of design and manufacture of tools for metal stampings

    Microsoft Academic Search

    B. T Cheok; A. Y. C Nee

    1998-01-01

    Metal stampings play an important part in modern-day life. Together with plastic molds, they form the most important structural components of all electrical and electronic equipment. Researchers all over the world have spent a tremendous amount of time and effort trying to develop better computer aids for the design of tools and dies required to manufacture metal stampings. This paper

  15. Study on the springback in metal stamping for a male hinge of an automotive part

    Microsoft Academic Search

    Suhadiyana Hanapi; Omar Abdul Rahman; Roseleena Jaafar; Wan Emri Wan Abdul Rahman; Farrahshaida Mohd Salleh; Izdihar Tharazi

    2010-01-01

    Industrial automation processes has lead to an increasing need for more precise parts. A stamping die is a special and one of a kind precision tool that cuts and forms sheet metal into desired shape. Springback, wrinkling and tearing are some of the common defects in stamped parts. The aim of this research work is to develop and apply an

  16. Design of over-crown in sheet metal stamping using finite element method

    Microsoft Academic Search

    H. Livatyali; M. M. Ergeldi

    2006-01-01

    Computer aided design in sheet metal forming using hard dies, which has a significant role in the automotive industry, was investigated. More specifically, the springback problem in stamping die design was elaborated and a solution method in die design was developed and evaluated. This compensation method assumes the necessary geometry change due to springback same as the springback and modifies

  17. Stamping and stamping simulation with a blankholder gap

    Microsoft Academic Search

    Wang Huaibao; Xu Weili; Lin Zhongqin; Yang Yuying; Z. R. Wang

    2002-01-01

    Applying a blankholder gap is the main method of control of the blankholder in stamping or its simulation. In this paper, the nature of stamping with a blankholder gap is provided as well as two advantages of stamping simulation with a blankholder gap. Finally, a reasonable blankholder gap for cup deep drawing and the reverse drawing process is proposed.

  18. 2.NBT Counting Stamps

    NSDL National Science Digital Library

    This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: The post office packages stamps like this: 10 stamps in each strip. 10 strips of 10 in each sheet. Yesterday Mike saw 4 full sheets, 7 strips, and 2 ex...

  19. Restoration of stamp marks on steel components.

    PubMed

    Wightman, Graham; Matthew, Jennifer

    2008-08-25

    Stamp marks are used as a unique identification for a range of items, but these can be erased for criminal activities. Erased marks can sometimes be recovered by etching or magnetic means. The present study looked at the application of Fry's reagent to recover erased marks from steel. The investigation also demonstrated that Fry's reagent can deteriorate on storing and will require a longer etching time. The effect of different applied forces of stamping was investigated, and the depth of the underlying deformation was determined by etching after varying degrees of metal removal. The amount of metal needing to be removed depends on the force applied to the die. Metal removal also affects the time needed for recovery. The underlying structural change remains as a hidden identification mark, and could potentially be used by manufacturers as an unseen identifier. A model for the underlying deformation is proposed. PMID:18707832

  20. Do food stamps cause obesity?

    Microsoft Academic Search

    Neeraj Kaushal

    2007-01-01

    I use changes in immigrant eligibility for food stamps under the 1996 federal law and heterogeneous state responses to set up a natural experiment research design to study the effect of food stamps on Body Mass Index (BMI) of adults in immigrant families. I find that in the post-1996 period food stamps use by foreign-born unmarried mothers with a high

  1. Electromagnetically assisted sheet metal stamping

    Microsoft Academic Search

    Jianhui Shang; Glenn Daehn

    2011-01-01

    A new approach, electromagnetically assisted sheet metal stamping, has been developed to alter strain distribution and improve formability in sheet metal stamping. In this study, this new approach was applied to form a non-symmetric panel from Al 6111-T4. The results show that this new approach greatly increased the draw depth of the formed panel, compared with conventional stamping. A detailed

  2. Hierarchical Time-Stamp Protocol: Acquiring Reliable Time-stamp from Local Time Stamping Server

    Microsoft Academic Search

    Xian Pan; J.-L. Zheng

    2009-01-01

    Time Stamp Protocol (TSP) is a basic security component in e-world, and Time Stamping Server (TSS)as a Trusted Third Party (TTP) generally is implemented on Internet other than in LAN. The acquiring reliability of the existing time-stamp protocols has been mainly focused by researchers in recent years, but the time delay problem produced by frequent time-stamp request has not been

  3. Springback Prediction, Compensation and Correlation for Automotive Stamping

    Microsoft Academic Search

    Siguang Xu; Kunmin Zhao; Terry Lanker; Jimmy Zhang; C. T. Wang

    2005-01-01

    To reduce weight and increase fuel efficiency and safety, more and more automotive sheet stamping parts are being made of aluminum and high strength steels. Forming of such materials encounters not just reduced formability but also dimensional quality problems. Springback prediction accuracy and compensation effectiveness have been the major challenge to die development, construction and tryout. In this paper, the

  4. Sliding distance, contact pressure and wear in sheet metal stamping

    Microsoft Academic Search

    Michael P. Pereira; Wenyi Yan; Bernard F. Rolfe

    2010-01-01

    This paper directly examines the contact sliding distance experienced during a typical sheet metal stamping process—an area that has largely been neglected in the literature. A method to numerically quantify the sliding distance is proposed. The sliding distance predicted from this method, and the contact pressure obtained from numerical simulation, allow the recently identified time-dependent contact conditions on the die

  5. Chemistry on Stamps.

    ERIC Educational Resources Information Center

    Schreck, James O.

    1986-01-01

    Suggests how postage stamps can be incorporated into chemistry teaching. Categories considered include emergence of chemistry as a science, metric system, atoms (and molecules and ions), stoichiometry, energy relationships in chemical systems, chemical bonding, nuclear chemistry, biochemistry, geochemistry, matter (gases, liquids, and solids),…

  6. Stamp of Approval

    ERIC Educational Resources Information Center

    Meraw, Leonard J.

    2007-01-01

    Advanced Placement (AP) Chemistry and the National AP Chemistry Examination are both critical to secondary level institutions nationwide. The use of a national embossing stamp to attest to successful completion of an AP Chemistry course and exam to ensure college credit is a novel idea worth consideration. Moreover, the concept could be expanded…

  7. Rapid thermal processing by stamping

    DOEpatents

    Stradins, Pauls; Wang, Qi

    2013-03-05

    A rapid thermal processing device and methods are provided for thermal processing of samples such as semiconductor wafers. The device has components including a stamp (35) having a stamping surface and a heater or cooler (40) to bring it to a selected processing temperature, a sample holder (20) for holding a sample (10) in position for intimate contact with the stamping surface; and positioning components (25) for moving the stamping surface and the stamp (35) in and away from intimate, substantially non-pressured contact. Methods for using and making such devices are also provided. These devices and methods allow inexpensive, efficient, easily controllable thermal processing.

  8. Design of Channel Type Indirect Blank Holder for Prevention of Wrinkling and Fracture in Hot Stamping Process

    Microsoft Academic Search

    Hong-Seok Choi; Se-Yoon Ha; Seung-Hoon Cha; Chung-Gil Kang; Byung-Min Kim

    2011-01-01

    The hot stamping process has been used in the automotive industry to reduce the weight of the body-in-white and to increase passenger safety via improved crashworthiness. In this study, a new form die with a simple structure that can prevent defects such as wrinkle and fracture is proposed for the manufacture of hot stamped components. The wrinkling at the flange

  9. Pokemon Trading Card Sequences Mark Stamp Austin E Stamp

    E-print Network

    Stamp, Mark

    Pok´emon Trading Card Sequences Mark Stamp Austin E Stamp March 25, 2003 Abstract In this note, Pok´emon a larger sequence. We present this sequence and mention several related problems. 1 Introduction Pok´emon Monstaa," Japanese for "Pocket Monster," which was eventually shortened to Pok´emon. Pok´emon first

  10. Enhancing e-Government Services through Digital Time Stamping: Time Stamping System Specifications

    Microsoft Academic Search

    Peeter Laud

    2008-01-01

    The paper aims to analyze the importance of digital time stamping service and digital time stamping systems components, organization requirements for implementing digital stamp service system. Time stamping helps significantly increase the level of confidence currently required in a public-key infrastructure by making it possible to track timing of signing the documents. Therefore time stamping in many cases is becoming

  11. Massively Parallel Processing for Fast and Accurate Stamping Simulations

    NASA Astrophysics Data System (ADS)

    Gress, Jeffrey J.; Xu, Siguang; Joshi, Ramesh; Wang, Chuan-tao; Paul, Sabu

    2005-08-01

    The competitive automotive market drives automotive manufacturers to speed up the vehicle development cycles and reduce the lead-time. Fast tooling development is one of the key areas to support fast and short vehicle development programs (VDP). In the past ten years, the stamping simulation has become the most effective validation tool in predicting and resolving all potential formability and quality problems before the dies are physically made. The stamping simulation and formability analysis has become an critical business segment in GM math-based die engineering process. As the simulation becomes as one of the major production tools in engineering factory, the simulation speed and accuracy are the two of the most important measures for stamping simulation technology. The speed and time-in-system of forming analysis becomes an even more critical to support the fast VDP and tooling readiness. Since 1997, General Motors Die Center has been working jointly with our software vendor to develop and implement a parallel version of simulation software for mass production analysis applications. By 2001, this technology was matured in the form of distributed memory processing (DMP) of draw die simulations in a networked distributed memory computing environment. In 2004, this technology was refined to massively parallel processing (MPP) and extended to line die forming analysis (draw, trim, flange, and associated spring-back) running on a dedicated computing environment. The evolution of this technology and the insight gained through the implementation of DM0P/MPP technology as well as performance benchmarks are discussed in this publication.

  12. Direct imprint of nanostructures in metals using porous anodic alumina stamps

    NASA Astrophysics Data System (ADS)

    Lang, Xianzhong; Qiu, Teng; Long, Kailin; Han, Di; Nan, Haiyan; Chu, Paul K.

    2013-06-01

    A single-step nanoimprint process for direct patterning of metallic nanostructures at room temperature is described. Porous anodic alumina (PAA) is used for stamps and the structure can be optimized by adjusting the PAA fabrication parameters. The periodic hexagonal cells on the PAA stamps are transferred to the metals by mechanically pressing the stamps into the substrate, and various metal nanopatterns with different hardnesses and elastic moduli such as Sn, Zn, Al, Ag, Mg and Cu are fabricated. Metal nanopits or nanoislands with well defined spacing between 75 and 150 nm can be readily produced using the metal direct imprinting process. The mechanical properties of the PAA stamps and effects of imprinting pressure on the height of the transferred patterns are also investigated.

  13. 27 CFR 479.162 - Stamps authorized.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.162 Stamps authorized....

  14. 27 CFR 479.162 - Stamps authorized.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.162 Stamps authorized....

  15. 27 CFR 479.162 - Stamps authorized.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.162 Stamps authorized....

  16. 27 CFR 479.162 - Stamps authorized.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.162 Stamps authorized....

  17. 27 CFR 479.162 - Stamps authorized.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.162 Stamps authorized....

  18. Providing Interoperable Time Stamping Services (Invited Paper)

    Microsoft Academic Search

    G. Cattaneo; A. Cilardo; A. Mazzeo; L. Romano; G. P. Saggese

    This paper presents a web-based architecture for providing digital time stamping services. Time stamping services are typically divided into schemes which rely on unconditionally trusted Time Stamping Authorities (TSAs) and schemes which do not, namely the so called linking schemes. The proposed architecture relies on a multi-tier structure. The middle-tier exposes digital time stamping functions behind a unified interface. The

  19. UCSD Mail Services USPS Stamp Order

    E-print Network

    Coles, William A.

    UCSD Mail Services USPS Stamp Order Name: Department: Mail Code: Phone Number: Index Number Current Date: Think Green Think Green Type Quantity $ Amount Total .49 stamps x 0.49 -- Book of 20 x 9.80 -- Roll of 100 x 49.00 -- Book of 20 x 6.80 .70 stamps (for 2oz. letter) x 0.70 .91 stamps (for 3oz

  20. Mortality at an automotive stamping and assembly complex.

    PubMed

    Park, R; Krebs, J; Mirer, F

    1994-10-01

    Mortality among workers with 2 or more years employment at an automotive stamping and assembly complex was analyzed using standardized mortality ratio (SMR), proportional mortality ratio (PMR), and mortality odds ratio (MOR) methods. The stamping plant all-cause SMR was considerably less than expected (for white men, SMR = 0.65, 95% confidence interval [CI] = 0.54, 0.79; for black men, SMR = 0.73, 95% CI = 0.45, 1.13), indicating a strong "healthy worker effect." However, six stomach cancer deaths produced an SMR of 4.4 (95% CI = 1.62, 9.6) and a PMR of 6.8 (95% CI = 2.5, 15). Based on small numbers of cases, stomach cancer risk increased with duration in stamping and tool and die departments where exposures included drawing compound and other metalworking fluids. Stamping plant lung cancer mortality was elevated among production welders (MOR = 2.7, 95% CI = 1.2, 6.3), and increased with duration. Welding was performed on sheet metal sometimes coated with drawing compound, primer, or epoxy resin adhesive. As was observed for the stamping plant, the all-cause SMR for the two assembly plants was unusually low (for white men, SMR = 0.64, 95% CI = 0.56, 0.73; for black men, SMR = 0.57, 95% CI = 0.43, 0.75). The lung cancer SMR was not elevated but the MOR was (MOR = 1.58, 95% CI = 1.1, 2.4) and increased with assembly plant duration (MOR = 1.78, 95% CI = 1.02, 3.1, at mean duration of cases). In the assembly plants, paint oven stack emissions had been reintroduced into the plant by the ventilation system. PMID:7810544

  1. Efficient Broadcast TimeStamping (Extended Abstract)

    E-print Network

    Bernstein, Phil

    Efficient Broadcast Time­Stamping (Extended Abstract) Josh Benaloh Clarkson University Michael de Mare Clarkson University April 21, 1992 #12; Efficient Broadcast Time­Stamping (Extended Abstract) Abstract Even using an authenticated synchronous broadcast model, the task of unforgeably time­stamping

  2. Food Stamps. Learning Packet No. 2.

    ERIC Educational Resources Information Center

    American Bar Association, Washington, DC. Clearinghouse for Offender Literacy Programs.

    This package of instructional materials is designed to aid adults in prison to perform the functional skill of applying for food stamps. The materials consist of instructions for teachers, a sample application for food stamps, a student's work sheet and answer sheet, vocabulary flash cards, and resource materials on food stamps. (MKM)

  3. Tissue Scaffold Engineering by Micro-Stamping Journal: 2013 MRS Fall Meeting

    E-print Network

    White, Robert D.

    , but could not be stamped with a 200 m circular punch at room temperature, regardless of die clearance due. While cooled, 203 m hole patterns were successfully punched in 33 m thick poly(-caprolactone) membranes and then fabricating hole patterns via micromechanical punching. Micro-punching first emerged in 2001

  4. Evaluation of metal stamping layouts using an analytic hierarchy process method

    Microsoft Academic Search

    R. Venkata Rao

    2004-01-01

    This paper presents a strip-layout selection procedure pertaining to metal die stamping work in complex layout situations. The method is based on analytic hierarchy process. The proposed strip-layout index helps to evaluate and rank any given set of strip-layout alternatives. The procedure is illustrated by means of an example.

  5. Diagnosis of sheet metal stamping processes based on thermal energy distribution

    Microsoft Academic Search

    Yiu-Ming Harry Ng; Maolin Yu; Y. Huang; R. Du

    2005-01-01

    Computer-aid design (CAD) and finite element analysis (FEA) have been widely used in sheet metal stamping nowadays, especially in automotive and aerospace industries. However, die tryout and fault diagnosis still heavily rely on the experiences of the machinists on the shop floor. In this paper, a novel approach is proposed using the thermal energy distribution of the part. The new

  6. Press Tonnage Signal Decomposition and Validation Analysis for

    E-print Network

    Jin, Jionghua "Judy"

    In the last decade, transfer or progressive die processes have been widely used in stamping industry due metal blank is cut from the coil before or at the beginning of the operations. Mechanical transfer

  7. Image-Based Stamp Extraction for Enhanced Postal Automation

    Microsoft Academic Search

    Haidong Yuan; Huadong Ma; Xiaodong Huang

    2008-01-01

    Postal automation is yet a partially solved challenge, and part of the challenge is the automatic and accurate extraction of stamps in envelope. We observed that the stamp perforations form a distinct boundary between the stamps and the background. The number and the linear distribution of stamp perforations can be utilized to extract and validate each stamp accurately. In this

  8. CERTIFICATES ON STAMPED PAPER REQUEST FORM Personal code ___________________________________________________________________________

    E-print Network

    Stamp duty at current Value 16,00 CERTIFICATES ON STAMPED PAPER REQUEST FORM Personal code. Certificates are issued on paper bearing stamp duty at current value (16,00), one stamp per certificate requested. I am attaching no. ____ stamps to be collected personally from the Student Secretariat's Office

  9. CERTIFICATES ON STAMPED PAPER REQUEST FORM Personal code _______________________________________________________________________________

    E-print Network

    Stamp duty at current value 16,00 CERTIFICATES ON STAMPED PAPER REQUEST FORM Personal code bearing stamp duty at current value (16,00), one stamp per certificate requested. I am attaching no. ____ stamps to be collected personally from the Student Support Office to be delivered to the following

  10. Impact of Simulation Technology on Die and Stamping Business

    Microsoft Academic Search

    Mark W. Stevens

    2005-01-01

    Over the last ten years, we have seen an explosion in the use of simulation-based techniques to improve the engineering, construction, and operation of GM production tools. The impact has been as profound as the overall switch to CAD\\/CAM from the old manual design and construction methods. The changeover to N\\/C machining from duplicating milling machines brought advances in accuracy

  11. Springback Prediction, Compensation and Correlation for Automotive Stamping

    NASA Astrophysics Data System (ADS)

    Xu, Siguang; Zhao, Kunmin; Lanker, Terry; Zhang, Jimmy; Wang, C. T.

    2005-08-01

    To reduce weight and increase fuel efficiency and safety, more and more automotive sheet stamping parts are being made of aluminum and high strength steels. Forming of such materials encounters not just reduced formability but also dimensional quality problems. Springback prediction accuracy and compensation effectiveness have been the major challenge to die development, construction and tryout. In this paper, the factors that affect the accuracy of springback prediction are discussed, which includes the effect of material models, the selection of element size, and the contact algorithms. Springback predictions of several automotive aluminum and high strength panels are compared with measurement data. The examples show that the prediction correlates with measurement data in both springback trend and magnitude. The effect of springback on final product can be reduced or eliminated through process control and die face compensation. The process control method involves finding the root causes of springback and eliminating them through process modification. The geometrical compensation of die surface is a direct way to eliminate the springback effect. The global scaling compensation method is normally limited to parts with relatively small springback. For large springback and twisting, a new approach is discussed, which takes into account of the effect of deformation and springback history. The compensation is achieved iteratively by solving a system of non-linear equations. Production dies were cut to the compensated surface, which shows that the die compensation is an efficient way to reduce springback-induced geometry deviation.

  12. A short note on an intelligent system for selection of materials for progressive die components

    Microsoft Academic Search

    S. Kumar; R. Singh

    2007-01-01

    Selection of materials for die components is an important activity during progressive die design in stamping industries. This paper presents an intelligent system for selection of materials for progressive die components. The proposed system SMPDC comprises of two knowledge base modules, namely DIEMAT and SELHRD. The module DIEMAT is designed for selection of materials for both active and inactive components

  13. Food Stamp Nutrition Education Program: Assisting Food Stamp Recipients to Become Self-sufficient

    Microsoft Academic Search

    Amy Block Joy; Charlotte Doisy

    1996-01-01

    The Food Stamp Nutrition Education Program (FSNEP) has been assisting food stamp recipients since the first state program began in 1986. Funding, provided by the Food Stamp administrative budget, is available as an option to all states; for those states that participate, there is a 50% match requirement. USDA's Food and Consumer Service (FCS) is the federal agency that approves

  14. van die Universiteit Stellenbosch Die kern van die beleid

    E-print Network

    Geldenhuys, Jaco

    as akademiese taal, maar neem daarmee saam die multikulturele en meertalige #12;2 Suid-Afrikaanse werklikheid- prosesse. 4. Die Taalbeleid neem die waardes en uitgangspunte wat in die Strategiese Raamwerk van die daarvan. 8. Die Taalbeleid neem die diversiteitsdoelwitte van die Universiteit in ag. 9. Die Taalbeleid

  15. A NOTE ON STAMPING ANNEKE BART AND KEVIN P. SCANNELL

    E-print Network

    Scannell, Kevin Patrick

    A NOTE ON STAMPING ANNEKE BART AND KEVIN P. SCANNELL Abstract. The stamping deformation was defined distinct from bending. We show that in fact the stamping cocycle is equal to the sum of three bending interest in this paper, was the so-called "stamping deformation" defined by Apanasov [2], [3] for a certain

  16. STAMP IDENTIFICATION NUMBERS DEPARTMENT OF TRADE AND INDUSTRY

    E-print Network

    Green, Richard M.

    STAMP IDENTIFICATION NUMBERS DEPARTMENT OF TRADE AND INDUSTRY WEIGHTS AND MEASURES (PRESCRIBED STAMP) REGULATIONS 1968 LIST OF IDENTIFICATION NUMBERS National Weights and Measures Laboratory Stanton in one area have been re-allocated to another part of the country. #12;Stamp No. Authority Stamp No

  17. Stamp & Extend Instant but Undeniable Timestamping based on

    E-print Network

    Stamp & Extend ­ Instant but Undeniable Timestamping based on Lazy Trees Lukasz Krzywiecki a Stamp&Extend time-stamping scheme based on linking via mod- ified creation of Schnorr signatures. The scheme is based on lazy construction of a tree of signatures. Stamp&Extend returns a timestamp

  18. On Universal Composable Security of Time-Stamping Protocols

    E-print Network

    On Universal Composable Security of Time-Stamping Protocols Toshihiko Matsuo and Shin'ichiro Matsuo,matsuosn}@nttdata.co.jp Abstract. Time-stamping protocols, which assure that a document was existed at a certain time, are applied. There are two major time-stamping protocols, the simple protocol and the linking protocol. In the former, a time-stamp

  19. Food Stamp Program; Cashier Training Manual. New Rules.

    ERIC Educational Resources Information Center

    Department of Agriculture, Washington, DC.

    Rules concerning the Food Stamp Program are explained in this booklet designed for store clerks who handle food stamp transactions. The material is presented in a question-and-answer format and is organized under the following topics: what food stamps can buy; cash for nonfood items; separate elibible food from nonfood items; food stamp

  20. Dynamic-template processing for passive thermograms: Applied to automotive stamping split detection

    Microsoft Academic Search

    Yi Zhou; Mohammed Omar

    2008-01-01

    This manuscript introduces a passive thermal-vision modality to detect splits and tears in automotive stampings in real time. This system scans 3D temperature maps of high reflective steel panels, with complex geometry in addition to the drawing die, to locate abnormal temperature readings indicative of high local wrinkling pressure (cause of metal splitting). Preprocessing utilizes a coefficient-correction map to account

  1. Investigation of deformation and failure features in hot stamping of AA6082: Experimentation and modelling

    Microsoft Academic Search

    Mohamed S. Mohamed; Alistair D. Foster; Jianguo Lin; Daniel S. Balint; Trevor A. Dean

    This paper introduces a set of coupled viscoplastic constitutive equations for deformation and damage in hot stamping and cold die quenching of AA6082 panel parts. The equation set can be used to predict viscoplastic flow and plasticity-induced damage of AA6082 under hot forming conditions. Deformation and damage depend upon a coupled set of evolving internal state variables, e.g. dislocation density,

  2. Integrated software package STAMP for minor planets

    NASA Technical Reports Server (NTRS)

    Kochetova, O. M.; Shor, Viktor A.

    1992-01-01

    The integrated software package STAMP allowed for rapid and exact reproduction of the tables of the year-book 'Ephemerides of Minor Planets.' Additionally, STAMP solved the typical problems connected with the use of the year-book. STAMP is described. The year-book 'Ephemerides of Minor Planets' (EMP) is a publication used in many astronomical institutions around the world. It contains all the necessary information on the orbits of the numbered minor planets. Also, the astronomical coordinates are provided for each planet during its suitable observation period.

  3. A case study of Vioxx using STAMP

    E-print Network

    Couturier, Matthieu (Matthieu Jean)

    2010-01-01

    The goal of this thesis is to investigate and demonstrate the application of a systems approach to drug safety. The recall of the prescription drug Vioxx (Rofecoxib) was used as a test case to study whether STAMP (Systems ...

  4. Nanostructured Crosslinkable Micropatterns by Amphiphilic Dendrimer Stamping

    E-print Network

    Nanostructured Crosslinkable Micropatterns by Amphiphilic Dendrimer Stamping Neeraj Kohli,1 Petar R Keywords: amphiphilic; crosslinking; dendrimers; microcontact printing; spin self-assembly Introduction, amphiphilic films with hydrophobic biological molecules can yield biomimetic interfaces able to reproduce

  5. Recent Innovations in Hyperworks® Stamping Simulation Technology

    Microsoft Academic Search

    Subir Roy; Lionel Morancay; Erwan Beauchesne; Hariharasudhan Palaniswamy

    2011-01-01

    HyperForm® and RADIOSS® which are components of the Altair® HyperWorks® software suite have been used for stamping simulation for the last fifteen years. Many features specialized for explicit stamping simulation to accurately capture the material behavior and contact phenomena have been developed over the years. Over the recent years several new innovative enhancements have been made to HyperForm and RADIOSS

  6. Design of Channel Type Indirect Blank Holder for Prevention of Wrinkling and Fracture in Hot Stamping Process

    NASA Astrophysics Data System (ADS)

    Choi, Hong-seok; Ha, Se-yoon; Cha, Seung-hoon; kang, Chung-gil; Kim, Byung-min

    2011-08-01

    The hot stamping process has been used in the automotive industry to reduce the weight of the body-in-white and to increase passenger safety via improved crashworthiness. In this study, a new form die with a simple structure that can prevent defects such as wrinkle and fracture is proposed for the manufacture of hot stamped components. The wrinkling at the flange cannot be eliminated when using a conventional form die. It is known that the initiation of wrinkling is influenced by many factors such as the mechanical properties of the sheet material, geometry of the sheet and tool, and other process parameters, including the blank holding force (BHF) and the contact conditions. In this research, channel type indirect blank holder (CIBH) is introduced to replace general blank holder for manufacturing the hot stamped center pillar. First, we investigate the tension force acting on the blank according to the channel shapes. We determine the appropriate range by comparing the tension force with the upper and lower BHFs in a conventional stamping process. We then use FE-analysis to study the influence of the slope angle and corner radius of the channel on the formability. Finally, the center pillar is manufactured using the form die with the selected channel.

  7. Optimization of the Giant Hydraulic Press's Synchronism-Balancing Control System

    Microsoft Academic Search

    Liu ZhongWei; Liu ShaoJun; Huang Minghui; Zhou Yucai; Deng YingJian

    2009-01-01

    The 300MN hydraulic die press is our country national defense and the infrastructure essential equipment, it is equipped with the synchronism-balancing control system, it is very important in improving the process precision of the product, ameliorating the force standing state of the die forging press frame, and extending the life of the die forging press body and the moulds. In

  8. Stamping SERS for creatinine sensing

    NASA Astrophysics Data System (ADS)

    Li, Ming; Du, Yong; Zhao, Fusheng; Zeng, Jianbo; Santos, Greggy M.; Mohan, Chandra; Shih, Wei-Chuan

    2015-03-01

    Urine can be obtained easily, readily and non-invasively. The analysis of urine can provide metabolic information of the body and the condition of renal function. Creatinine is one of the major components of human urine associated with muscle metabolism. Since the content of creatinine excreted into urine is relatively constant, it is used as an internal standard to normalize water variations. Moreover, the detection of creatinine concentration in urine is important for the renal clearance test, which can monitor the filtration function of kidney and health status. In more details, kidney failure can be imminent when the creatinine concentration in urine is high. A simple device and protocol for creatinine sensing in urine samples can be valuable for point-of-care applications. We reported quantitative analysis of creatinine in urine samples by using stamping surface enhanced Raman scattering (S-SERS) technique with nanoporous gold disk (NPGD) based SERS substrate. S-SERS technique enables label-free and multiplexed molecular sensing under dry condition, while NPGD provides a robust, controllable, and high-sensitivity SERS substrate. The performance of S-SERS with NGPDs is evaluated by the detection and quantification of pure creatinine and creatinine in artificial urine within physiologically relevant concentration ranges.

  9. A sheet metal forming simulation of automotive outer panels considering the behavior of air in die cavity

    NASA Astrophysics Data System (ADS)

    Choi, Kwang Yong; Kim, Yun Chang; Choi, Hee Kwan; Kang, Chul Ho; Kim, Heon Young

    2013-12-01

    During a sheet metal forming process of automotive outer panels, the air trapped between a blank sheet and a die tool can become highly compressed, ultimately influencing the blank deformation and the press force. To prevent this problem, vent holes are drilled into die tools and needs several tens to hundreds according to the model size. The design and the drilling of vent holes are based on expert's experience and try-out result and thus the process can be one of reasons increasing development cycle. Therefore the study on the size, the number, and the position of vent holes is demanded for reducing development cycle, but there is no simulation technology for analyzing forming defects, making numerical sheet metal forming process simulations that incorporate the fluid dynamics of air. This study presents a sheet metal forming simulation of automotive outer panels (a roof and a body side outer) that simultaneously simulates the behavior of air in a die cavity. Through CAE results, the effect of air behavior and vent holes to blank deformation was analyzed. For this study, the commercial software PAM-STAMP{trade mark, serif} and PAM-SAFE{trade mark, serif} was used.

  10. Stamping of Thin-Walled Structural Components with Magnesium Alloy AZ31 Sheets

    NASA Astrophysics Data System (ADS)

    Chen, Fuh-Kuo; Chang, Chih-Kun

    2005-08-01

    In the present study, the stamping process for manufacturing cell phone cases with magnesium alloy AZ31 sheets was studied using both the experimental approach and the finite element analysis. In order to determine the proper forming temperature and set up a fracture criterion, tensile tests and forming limit tests were first conducted to obtain the mechanical behaviors of AZ31 sheets at various elevated temperatures. The mechanical properties of Z31 sheets obtained from the experiments were then adopted in the finite element analysis to investigate the effects of the process parameters on the formability of the stamping process of cell phone cases. The finite element simulation results revealed that both the fracture and wrinkle defects could not be eliminated at the same time by adjusting blank-holder force or blank size. A drawbead design was then performed using the finite element simulations to determine the size and the location of drawbead required to suppress the wrinkle defect. An optimum stamping process, including die geometry, forming temperature, and blank dimension, was then determined for manufacturing the cell phone cases. The finite element analysis was validated by the good agreement between the simulation results and the experimental data. It confirms that the cell phone cases can be produced with magnesium alloy AZ31 sheet by the stamping process at elevated temperatures.

  11. Die Milchstraße.

    NASA Astrophysics Data System (ADS)

    Henbest, N.; Couper, H.

    This book is a German translation, by M. Röser, from the English original "The guide to the Galaxy", published in 1994 (see Abstr. 61.003.065). Contents: 1. Die Entdeckung unserer Galaxis. 2. Die Lokale Gruppe. 3. Die Geographie der Galaxis. 4. Der Perseus-Arm. 5. Der Orion-Arm. 6. Unsere lokale Nachbarschaft: ein typischer Winkel der Galaxis. 7. Der Sagittarius-Arm: innerhalb der Sonnenumlaufbahn. 8. Das Zentrum der Galaxis.

  12. Recent Innovations in Hyperworks® Stamping Simulation Technology

    NASA Astrophysics Data System (ADS)

    Roy, Subir; Morancay, Lionel; Beauchesne, Erwan; Palaniswamy, Hariharasudhan

    2011-08-01

    HyperForm® and RADIOSS® which are components of the Altair® HyperWorks® software suite have been used for stamping simulation for the last fifteen years. Many features specialized for explicit stamping simulation to accurately capture the material behavior and contact phenomena have been developed over the years. Over the recent years several new innovative enhancements have been made to HyperForm and RADIOSS based on industry needs such as, analysis with fine mesh from the start of analysis for accurate spring back prediction without sacrifice of performance obtained with mesh adaptivity; high degree of scalability, reliability, quality and performance of the RADIOSS solver across multiple processors; modeling of thick sheet metal with solid elements; thermal forming for advanced high strength steels; tool stress analysis, and optimization of stamping processes and tool structures. This paper illustrates the benefits of the most recently implemented novel features in HyperForm and RADIOSS using real life examples.

  13. Nanoscale plasmonic stamp lithography on silicon.

    PubMed

    Liu, Fenglin; Luber, Erik J; Huck, Lawrence A; Olsen, Brian C; Buriak, Jillian M

    2015-02-24

    Nanoscale lithography on silicon is of interest for applications ranging from computer chip design to tissue interfacing. Block copolymer-based self-assembly, also called directed self-assembly (DSA) within the semiconductor industry, can produce a variety of complex nanopatterns on silicon, but these polymeric films typically require transformation into functional materials. Here we demonstrate how gold nanopatterns, produced via block copolymer self-assembly, can be incorporated into an optically transparent flexible PDMS stamp, termed a plasmonic stamp, and used to directly functionalize silicon surfaces on a sub-100 nm scale. We propose that the high intensity electric fields that result from the localized surface plasmons of the gold nanoparticles in the plasmonic stamps upon illumination with low intensity green light, lead to generation of electron-hole pairs in the silicon that drive spatially localized hydrosilylation. This approach demonstrates how localized surface plasmons can be used to enable functionalization of technologically relevant surfaces with nanoscale control. PMID:25654172

  14. 27 CFR 479.163 - Reuse of stamps prohibited.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.163 Reuse of stamps...

  15. 27 CFR 479.163 - Reuse of stamps prohibited.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.163 Reuse of stamps...

  16. 27 CFR 479.163 - Reuse of stamps prohibited.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.163 Reuse of stamps...

  17. 27 CFR 479.163 - Reuse of stamps prohibited.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.163 Reuse of stamps...

  18. 27 CFR 479.163 - Reuse of stamps prohibited.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.163 Reuse of stamps...

  19. 7 CFR 273.25 - Simplified Food Stamp Program.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...analyses. (c) Application processing standards. Under statutory...application using the regular Food Stamp Program requirements of § 273.2, including processing within the 30-day regular...determine under regular food stamp rules the...

  20. 7 CFR 273.25 - Simplified Food Stamp Program.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...analyses. (c) Application processing standards. Under statutory...application using the regular Food Stamp Program requirements of § 273.2, including processing within the 30-day regular...determine under regular food stamp rules the...

  1. 7 CFR 273.25 - Simplified Food Stamp Program.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ...analyses. (c) Application processing standards. Under statutory...application using the regular Food Stamp Program requirements of § 273.2, including processing within the 30-day regular...determine under regular food stamp rules the...

  2. 7 CFR 273.25 - Simplified Food Stamp Program.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...analyses. (c) Application processing standards. Under statutory...application using the regular Food Stamp Program requirements of § 273.2, including processing within the 30-day regular...determine under regular food stamp rules the...

  3. Food Insufficiency, Food Stamp Participation, and Mental Health

    Microsoft Academic Search

    Colleen M. Heflin; James P. Ziliak

    2008-01-01

    This study examines whether the mental health consequences associated with food insufficiency vary by food stamp participation status and\\/or the value of the food stamp benefit received. Copyright (c) 2008 by the Southwestern Social Science Association.

  4. Directionally controlled transfer printing using micropatterned stamps

    NASA Astrophysics Data System (ADS)

    Chen, Hang; Feng, Xue; Chen, Ying

    2013-10-01

    Kinetically controlled transfer printing based on rate-dependent adhesion is widely used to heterogeneously integrate micro/nano-devices. Through analysis of peeling stamps with grating-like micropatterns from the rigid substrate in different directions, the directionally dependent adhesion strength is investigated in detail. Experiments of peel test and picking up silicon ribbons from silicon-on-insulator wafer were conducted and consistent with the analytical prediction. The method and analytical results proposed in this Letter can guide the design of the micropatterns on stamp to realize a more effective transfer printing approach.

  5. Patterning of polymers: precise channel stamping by optimizing wetting properties

    Microsoft Academic Search

    Ralf Seemann; Edward J. Kramer; Frederick F. Lange

    2004-01-01

    Channel stamping is a soft lithography technique that can be used to fabricate small structures of polymeric materials. This technique is cheap and easy but a considerable drawback is the fact that reproduction of the patterns of the stamp is often imprecise due to the wetting properties of liquid and stamp. In this paper, we report on experiments that reveal

  6. Bounded Concurrent Time-Stamp Systems Are Constructible

    E-print Network

    Lynch, Nancy

    Bounded Concurrent Time-Stamp Systems Are Constructible Abstract Danny Dolev Concurrent time stamping is at the heart of solu tions to some of the most fundamental problems in distributed computing. Based on concurrent time-stamp-systems, elegant and simple solu tions to core problems such as fcf

  7. 2013-14 SNAP (Food Stamps) Verification Worksheet

    E-print Network

    Pantaleone, Jim

    2013-14 SNAP (Food Stamps) Verification Worksheet Office of Student Financial Assistance P.O. Box Application for Federal Student Aid (FAFSA) indicates that a member of your household received Food Stamps Address Phone Number II. SNAP (FOOD STAMP) Did you or any member of your household receive Supplemental

  8. Stamping Oriented Molecular Monolayers Using Liquid Crystal Inks

    E-print Network

    Patrick, David L.

    1 Stamping Oriented Molecular Monolayers Using Liquid Crystal Inks Robert Thompson, Cory Lund system consisted of a stamp coated by 8CB (the `ink') applied to a graphite substrate. 1.5 cm x 1.5 cm stamps were made from mechanically rubbed polyimide (PI) films on glass, grooved Si, or embossed poly

  9. Improving Time Stamping Schemes: A Distributed Point of View

    E-print Network

    Boyer, Edmond

    Improving Time Stamping Schemes: A Distributed Point of View A. Bonnecaze et P. Liardet et A stamping is a technique used to prove the existence of a digital document prior to a specific point in time independent entities. This scheme appears to be a trusted and reliable distributed time stamping scheme. Mots

  10. STAMP: Stanford Transactional Applications for Multi-Processing

    E-print Network

    Kozyrakis, Christos

    STAMP: Stanford Transactional Applications for Multi-Processing Ch´i Cao Minh, JaeWoong Chung Transactional Application for Multi- Processing (STAMP), a comprehensive benchmark suite for eval- uating TM systems. STAMP includes eight applications and thirty variants of input parameters and data sets in order

  11. Guidance: IRB Approval Document Stamping DATE AUTHOR APPROVED BY PAGE

    E-print Network

    Schladow, S. Geoffrey

    Guidance: IRB Approval Document Stamping DATE AUTHOR APPROVED BY PAGE 11/18/2013 M. McFann C. Kiel to be stamped for varying reasons including investigator preference, sponsor documentation, and individual must be IRB stamped approved. To ensure consistency throughout the Campus and Health System, the IRB

  12. Undergraduate Colloquium Series Generating Functions and the Two Stamp Problem

    E-print Network

    White, Donald L.

    Undergraduate Colloquium Series Generating Functions and the Two Stamp Problem Prof. Kevin Woods a look at the following question: "Given two denominations of stamps, a cents and b cents, what be paid with a cent and b cent stamps) in a nice, compact form. Then we can use the generating functions

  13. BOUNDED CONCURRENT TIME-STAMPING DANNY DOLEV AND NIR SHAVIT

    E-print Network

    Lynch, Nancy

    BOUNDED CONCURRENT TIME-STAMPING DANNY DOLEV AND NIR SHAVIT SIAM J. COMPUT. c 1997 Society concurrent time-stamping, a paradigm that allows processes to tem- porally order concurrent events in an asynchronous shared-memory system. Concurrent time-stamp systems are powerful tools for concurrency control

  14. Improved Pattern Transfer in Soft Lithography Using Composite Stamps

    E-print Network

    Prentiss, Mara

    Improved Pattern Transfer in Soft Lithography Using Composite Stamps Teri W. Odom, J. Christopher, 2002. In Final Form: April 4, 2002 Composite stamps composed of two layerssa stiff layer supported. The preparation of these stamps was adapted from a procedure originally developed by Schmid et al. (Macromolecules

  15. Food Stamp Challenge By Bill Menke, November 3, 2013

    E-print Network

    Menke, William

    Food Stamp Challenge By Bill Menke, November 3, 2013 Co-parishioner Laurie Hilton suggested that I Stamp provides, in order to better understand the challenges faced by low-income people. I thought the week of my Food Stamp diet, I made many substantial purchases of non-food items. This was true even

  16. KnowledgeBinding Commitments with Applications in TimeStamping

    E-print Network

    Knowledge­Binding Commitments with Applications in Time­Stamping (Full Version) # Ahto Buldas 1, which makes the security definitions for time­stamping much more natural compared to the previous schemes with par­ tial opening property are sufficient for secure time­stamping if the number of elements

  17. A STAMP ANALYSIS OF THE LEX COMAIR 5191 ACCIDENT

    E-print Network

    Leveson, Nancy

    A STAMP ANALYSIS OF THE LEX COMAIR 5191 ACCIDENT Thesis submitted in partial fulfilment;A STAMP ANALYSIS OF THE LEX COMAIR 5191 ACCIDENT Paul S. Nelson 2 #12;Acknowledgements I want--Theoretic Accident Modeling and Processes (STAMP). It incorporates three basic components: constraints, hierarchical

  18. On Optimal Hash Tree Traversal for Interval TimeStamping

    E-print Network

    On Optimal Hash Tree Traversal for Interval Time­Stamping Helger Lipmaa Laboratory for Theoretical are space­optimal for interval time­stamping. At the same time, Willemson proposed a practical, implementation complexity, interval time­stamping, Laplace's method for integrals, tree traversal. 1 Introduction

  19. Fast Mining of Complex Time-Stamped Events Hanghang Tong

    E-print Network

    Fast Mining of Complex Time-Stamped Events Hanghang Tong Yasushi Sakurai Tina Eliassi-Rad§ Christos a collection of complex, time-stamped events, how do we find patterns and anomalies? Events could be meetings the following problems: (1) find time stamps that look similar to each other and group them; (2) find anomalies

  20. 2014-15 SNAP (Food Stamps) Verification Worksheet

    E-print Network

    Pantaleone, Jim

    2014-15 SNAP (Food Stamps) Verification Worksheet Office of Student Financial Assistance P.O. Box received Food Stamps/SNAP benefits during the 2012 and/or 2013 calendar year(s). Our office must verify Address Phone Number II. SNAP (FOOD STAMP) Did you or any member of your household receive Supplemental

  1. POLICY STATEMENT REGARDING THE IRB APPROVAL STAMP ON CONSENT FORMS

    E-print Network

    1 POLICY STATEMENT REGARDING THE IRB APPROVAL STAMP ON CONSENT FORMS 8/12/2008 The Duke University and sign a consent form that does not bear an IRB approval stamp and/or statement. It is the DUHS IRB's opinion that a visible IRB approval stamp on a consent form could be interpreted by the potential subject

  2. Knowledge-Binding Commitments with Applications in Time-Stamping

    E-print Network

    Knowledge-Binding Commitments with Applications in Time-Stamping (Full Version) Ahto Buldas1, which makes the security definitions for time-stamping much more natural compared to the previous schemes with par- tial opening property are sufficient for secure time-stamping if the number of elements

  3. STAMP: SMTP server Topological Analysis by Message headers Parsing

    E-print Network

    Paris-Sud XI, Université de

    STAMP: SMTP server Topological Analysis by Message headers Parsing Emmanuel Lochin1,2 1 CNRS ; LAAS ; LAAS ; F-31077 Toulouse, France emmanuel.lochin@isae.fr Abstract--This paper presents STAMP: a tool to analyse SMTP servers overlay topology. STAMP builds a weighted and oriented graph from an email database

  4. On Optimal Hash Tree Traversal for Interval Time-Stamping

    E-print Network

    On Optimal Hash Tree Traversal for Interval Time-Stamping Helger Lipmaa Laboratory for Theoretical are space-optimal for interval time-stamping. At the same time, Willemson proposed a practical, implementation complexity, interval time-stamping, Laplace's method for integrals, tree traversal. 1 Introduction

  5. Postage stamps: A convergence of metallurgy, art, and history

    NASA Astrophysics Data System (ADS)

    Habashi, Fathi

    2002-04-01

    Postage stamps have been used around the world to commemorate, in miniature, significant events and people, including those of importance in the history of metals and mineral production. From the presence of gold artifacts in an ancient Egyptian tomb to the role of uranium in nuclear power, stamps have captured the evolution of metallurgical processes. This article highlights some of those stamps.

  6. Die Systemsteuerung

    Microsoft Academic Search

    Martin Grotegut

    \\u000a In der Windows-Systemsteuerung, die aus dem Startmenü aufgerufen werden kann, befinden sich viele Programme, mit denen die\\u000a Einstellungen und die Arbeitsweise von Windows 7 angepasst werden können (siehe Abb. 4.1). Diese Abbildung ist jedoch nur\\u000a als Beispiel zu verstehen, denn in Abhängigkeit von der in einem System installierten Hard-\\/Software (z. B. Bluetooth-Adapter,\\u000a Apple Quicktime etc.) und Windows-7-Funktionen (bsp. für TabletPCs)

  7. Assisted dying.

    PubMed

    Hoffenberg, Raymond

    2006-01-01

    The Royal College of Physicians took a neutral position on the House of Lords Assisted Dying for the Terminally Ill Bill. While modern palliative care and the hospice approach have greatly reduced terminal suffering, they do not always achieve total relief of distressing symptoms--he majority of dying patients and their families probably do not receive optimal terminal care. In this article I try to rebut the common arguments against assisted dying and add some arguments in favour. I suggest that on this issue the medical professions are out of tune with majority public opinion. PMID:16521360

  8. Pixel Palette: Put Your Stamp on It.

    ERIC Educational Resources Information Center

    Osterer, Irv

    1998-01-01

    Describes a project used in a senior information design class where the students created their own self-portraits on rubber stamps through the use of Photoshop and QuarkXPress. Explains that the students learned about the difference between line art and continuous tone images as well as the effects of printing ink and papers. (CMK)

  9. Site Tamper and Material Plow Tool - STAMP

    NASA Technical Reports Server (NTRS)

    Aisen, Norman M.; Collins, Curtis L.; Trebi-Ollennu, Ashitey

    2012-01-01

    A non-actuated tool has been developed for preparing regolith for in situ measurement by smoothing uneven surfaces and excavating fresher subsurface material for planetary exploration. The STAMP tool contains two tools to prepare regolith for in situ measurement: a tamper to smooth uneven surfaces, and a blade to excavate fresher subsurface material.

  10. Rubber stamped plastic circuits for electronic paper

    Microsoft Academic Search

    J. A. Rogers; K. Baldwin; Zhenan Bao; A. Dodabalapur; V. R. Raju; J. Ewing; K. Amundson

    2001-01-01

    This paper illustrates the use of a high resolution form of rubber stamping, known as microcontact printing (?CP), for patterning plastic active matrix drive circuitry designed for electronic paper. The high resolution (~1 ?m) of the printed elements, the large area coverage (~1 sq ft.) and the good electrical performance of these systems suggest that the methods, materials and processing

  11. Economic Equity and the Food Stamp Program

    Microsoft Academic Search

    Basile P. Goungetas; Stanley R. Johnson

    1988-01-01

    The Thrifty Food Plan (TFP) is used to estimate the household food cost used for determining benefits for participants in the food stamp program. Dietary norms and requirements for macro and micronutrients are reflected in the TFP. Because the TFP is important in calculating benefit levels for FSP participants, it has received broad attention in policy debate. The present analysis

  12. Stamps Tell the Story of Nuclear Energy.

    ERIC Educational Resources Information Center

    Angelo, Joseph A., Jr.

    This document provides a summary history of the individual scientists principally responsible for the development of nuclear physics and a survey of modern utilization of atomic energy. Identified throughout the booklet are postage stamps illustrating each individual and topic discussed. (SL)

  13. Identifying variation in sheet metal stamping

    Microsoft Academic Search

    M. C. Doolan; S. Kalyanasundaram; P. Hodgson; M. Cardew-Hall

    2001-01-01

    This work looks at two different “Design of Experiments”(DoE) methods for defining an operating window in the sheet metal stamping process. The first involves the use of replicates at the different experimental points, while the second is a nonreplicated method. The two methods are compared by looking at the relationship results produced and the indication of variation in the process.

  14. 49 CFR 179.400-24 - Stamping.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...information plainly and permanently stamped into the metal near the center of the head of the outer jacket at the...specified markings may be incorporated on a data plate of corrosion-resistant metal, fillet welded in place on the head of the...

  15. 49 CFR 179.400-24 - Stamping.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...information plainly and permanently stamped into the metal near the center of the head of the outer jacket at the...specified markings may be incorporated on a data plate of corrosion-resistant metal, fillet welded in place on the head of the...

  16. 49 CFR 179.400-24 - Stamping.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...information plainly and permanently stamped into the metal near the center of the head of the outer jacket at the...specified markings may be incorporated on a data plate of corrosion-resistant metal, fillet welded in place on the head of the...

  17. 49 CFR 179.400-24 - Stamping.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...information plainly and permanently stamped into the metal near the center of the head of the outer jacket at the...specified markings may be incorporated on a data plate of corrosion-resistant metal, fillet welded in place on the head of the...

  18. 49 CFR 179.400-24 - Stamping.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...information plainly and permanently stamped into the metal near the center of the head of the outer jacket at the...specified markings may be incorporated on a data plate of corrosion-resistant metal, fillet welded in place on the head of the...

  19. Kiln for hot-pressing compacts in a continuous manner

    DOEpatents

    Reynolds, C.D Jr.

    1983-08-08

    The invention is directed to a hot pressing furnace or kiln which is capable of preheating, hot pressing, and cooling a plurality of articles in a sequential and continuous manner. The hot pressing furnace of the present invention comprises an elongated, horizontally disposed furnace capable of holding a plurality of displaceable pusher plates each supporting a die body loaded with refractory or ceramic material to be hot pressed. Each of these plates and the die body supported thereby is sequentially pushed through the preheating zone, a temperature stabilizing and a hot pressing zone, and a cooling zone so as to provide a continuous hot-pressing operation of a plurality of articles.

  20. Kiln for hot-pressing compacts in a continuous manner

    DOEpatents

    Reynolds, Jr., Carl D. (Clinton, TN)

    1985-01-01

    The present invention is directed to a hot pressing furnace or kiln which is capable of preheating, hot pressing, and cooling a plurality of articles in a sequential and continuous manner. The hot pressing furnace of the present invention comprises an elongated, horizontally disposed furnace capable of holding a plurality of displaceable pusher plates each supporting a die body loaded with refractory or ceramic material to be hot pressed. Each of these plates and the die body supported thereby is sequentially pushed through the preheating zone, a temperature stabilizing and a hot pressing zone, and a cooling zone so as to provide a continuous hot-pressing operation of a plurality of articles.

  1. Experimental Characterization of Heat Transfer Coefficients During Hot Forming Die Quenching of Boron Steel

    NASA Astrophysics Data System (ADS)

    Caron, Etienne; Daun, Kyle J.; Wells, Mary A.

    2013-04-01

    The heat transfer coefficient (HTC) between the sheet metal and the cold tool is required to predict the final microstructure and mechanical properties of parts manufactured via hot forming die quenching. Temperature data obtained from hot stamping experiments conducted on boron steel blanks were processed using an inverse heat conduction algorithm to calculate heat fluxes and temperatures at the blank/die interface. The effect of the thermocouple response time on the calculated heat flux was compensated by minimizing the heat imbalance between the blank and the die. Peak HTCs obtained at the end of the stamping phase match steady-state model predictions. At higher blank temperatures, the time-dependent deformation of contact asperities is associated with a transient regime in which calculated HTCs are a function of the initial stamping temperature.

  2. Studies on the finite element simulation in sheet metal stamping processes

    NASA Astrophysics Data System (ADS)

    Huang, Ying

    The sheet metal stamping process plays an important role in modern industry. With the ever-increasing demand for shape complexity, product quality and new materials, the traditional trial and error method for setting up a sheet metal stamping process is no longer efficient. As a result, the Finite Element Modeling (FEM) method has now been widely used. From a physical point of view, the formability and the quality of a product are influenced by several factors. The design of the product in the initial stage and the motion of the press during the production stage are two of these crucial factors. This thesis focuses on the numerical simulation for these two factors using FEM. Currently, there are a number of commercial FEM software systems available in the market. These software systems are based on an incremental FEM process that models the sheet metal stamping process in small incremental steps. Even though the incremental FEM is accurate, it is not suitable for the initial conceptual design for its needing of detailed design parameters and enormous calculation times. As a result, another type of FEM, called the inverse FEM method or one-step FEM method, has been proposed. While it is less accurate than that of the incremental method, this method requires much less computation and hence, has a great potential. However, it also faces a number of unsolved problems, which limits its application. This motivates the presented research. After the review of the basic theory of the inverse method, a new modified arc-length search method is proposed to find better initial solution. The methods to deal with the vertical walls are also discussed and presented. Then, a generalized multi-step inverse FEM method is proposed. It solves two key obstacles: the first one is to determine the initial solution of the intermediate three-dimensional configurations and the other is to control the movement of nodes so they could only slide on constraint surfaces during the search by Newton-Raphson iteration. The computer implementation of the generalized multi-step inverse FEM is also presented. By comparing to the simulation results using a commercial software system, the effectiveness of the new method is validated. Other than the product design, the punch motion (including punch speed and punch trajectory) of the stamping press also has significant effect on the formability and the quality of the product. In fact, this is one of the major reasons why hydraulic presses and/or servo presses are used for parts which demand high quality. In order to reveal the quantitative correlation between the punch motion and the part quality, the Cowper-Symonds strain rate constitutive model and the implicit dynamic incremental FEM are combined to conduct the research. The effects of the punch motion on the part quality, especially the plastic strain distribution and the potential springback, have been investigated for the deep drawing and the bending processes respectively. A qualitative relationship between the punch motion and the part quality is also derived. The reaction force of the punch motion causes the dynamic deformation of the press during the stamping, which in turn influences the part quality as well. This dynamic information, in the form of the strain signal, is an important basis for the on-line monitoring of the part quality. By using the actual force as the input to the press, the incremental FEM is needed to predict the strain of the press. The result is validated by means of experiments and can be used to assist the on-line monitoring.

  3. Smithsonian National Postal Museum Art of the Stamp

    NSDL National Science Digital Library

    The Art of the Stamp online exhibit presented by the National Postal Museum is designed to complement the exhibit on display at the Museum itself in Washington, DC. The online exhibit begins with a brief description of how subjects and themes for postage are suggested, and then continues to discuss the timeline for developing a stamp, which often can take two years or longer. The main material on the site is divided into various categories, such as American History, Stamps with a Story, and Love. For each stamp, visitors can learn about the artist who created each design, along with information about the first day of issue. The Stamps with a Story section is rather engaging, containing stories about the creation of the Bugs Bunny stamp (visitors can take a look at some of the more irreverent designs considered) and of course the famous Elvis Presley stamp, which was first issued on January 8, 1993.

  4. Playing to Win: American Sports & Athletes on Stamps

    NSDL National Science Digital Library

    The Smithsonian National Postal Museum has profiled a wide swath of American life on stamps over the years, and this latest online exhibit from their busy minds looks at American sports and athletes on stamps. The collection was created by Alexander Haimann, and it features dozens of unique and compelling stamps, including the 3-cent stamp issued to commemorate the 100th anniversary of the creation of baseball by Abner Doubleday in Cooperstown, New York. Each page of the site has a different thematic focus, including "Take Me Out to the Ball Game" (featuring notable ballparks) and "American Boxing: From Dempsey to Marciano". There is complete information for each stamp, including material on when the stamp was issued. Also, visitors can zoom in and out on each stamp to look for creative details.

  5. Defining the operating window for an automotive sheet pressing operation

    Microsoft Academic Search

    J. C Herron; P. D Hodgson; Cardew-Hall Cardew-Hall

    1998-01-01

    A methodology was developed that allowed the operating window of an automotive sheet metal forming process to be defined. The method was applied to a production panel drawn on a 1200 t double action press in an automotive stamping plant. The effects of corner pressure, shut height and draw speed on quality were examined using a full factorial design of

  6. Reading Like a Historian: Stamp Act

    NSDL National Science Digital Library

    Stanford History Education Group

    2012-09-24

    In this lesson, students study the origins of the American Revolution and the colonial protests against the Stamp Act in an effort to answer the central historical question: Why were colonists upset about the Stamp Act? Students will read 3 primary source documents: 1) a short piece form the Boston-Gazette urging protest, 2) a letter from an English newspaper expressing bafflement over the protests, and 3) a letter from tax collector John Hughes complaining of his ill-treatment and blaming it on the Presbyterians. Following the teacher’s model, students answer sourcing and contextualization questions for the first 2 documents and do the last on their own. Discussion questions which corroborate all 3 documents conclude the lesson.

  7. Modernization of Food Stamp Program Almost Complete

    NSDL National Science Digital Library

    Started in 1939, the food stamp program administered by the United States Department of Agriculture is one of the entitlement programs designated to provide a safety net for Americans. The program enjoys some of the greatest bipartisan support and continues to be immensely successful. Earlier this week, the Department of Agriculture announced that the paper stamps which have been issued under the program for over six decades will be completely phased out later this month and replaced by a plastic card that operates in the same fashion as a bank debit card. As part of this transformation of the program, the Agriculture Secretary Ann Veneman has commented that the Agriculture Department will be asking for suggestions for a new name for the food stamp program, a move that may also reduce some of the stigma that has been associated with this extremely valuable initiative in the past. Currently only six counties in California and the U.S. territory of Guam still use the paper food stamps. The usually staid Department of Agriculture has also been in the news as of late due to a comment made by a senior official in that government office who noted in an interview that people who eat at food banks are "taking the easy way out." Several elected officials from the state of Ohio took great exception to his comment, remarking in a letter sent to his office that "You have displayed a disparaging attitude toward the victims of hunger and an astonishing lack of awareness of what is happening beyond the Beltway."The first link leads to a news piece from the Washington Post that discusses the modernization of the delivery system for food stamps in detail. The second link will take visitors to a news brief from MSNBC that provides a summary of the debate surrounding the recent comment made by a senior official at the Department of Agriculture regarding the use of food banks. The third link leads to a 3-minute audio feature from NPR on the continuing popularity of food stamp programs across the United States, reported by the venerable Daniel Schorr. The fourth link leads to the official United States Department of Agriculture website about the food stamp program, complete with eligibility details and research reports on the effectiveness of the program. The fifth link leads to an October 2002 report on the continued success of the Special Supplemental Nutrition Program for Women, Infants, and Children (known colloquially as WIC), which "safeguards the health of low-income women, infants, and children up to age 5 who are at nutrition risk." The last and final link leads to a site that provides some fine information on the various food stamp benefit program outreach activities that are intended to provide information on eligibility and benefits, with the primary goal of increasing the participation rate amongst those eligible parties.

  8. Edge Tessellation and Stamp Foldings Puzzles

    Microsoft Academic Search

    Matthew Kirby; Ron Umble

    2009-01-01

    An edge tessellation is a tiling of the plane generated by reflecting a polygon in its edges. We prove that a polygon generating an edge tessellation is one the following eight types: a rectangle; an equilateral, 60-right, isosceles right, or 120-isosceles triangle; a 120-rhombus; a 60-90-120 kite; or a regular hexagon. A stamp folding puzzle is a paper folding problem

  9. Process signatures in metal stamping: Basic concepts

    Microsoft Academic Search

    M. Karima; N. Chandrasekaran; W. Tse

    1989-01-01

    The article establishes the basic concepts relating to a novel approach for representing grid analysis data termed “process\\u000a signatures.” The process signature is the shape of the strain envelope, which depicts the strain state of contiguous elements\\u000a in a stamping, corresponding to a given forming depth. Apart from inheriting unique process characteristics, the signatures\\u000a represent the total response of a

  10. 26 CFR 1.451-4 - Accounting for redemption of trading stamps and coupons.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... false Accounting for redemption of trading stamps and coupons. 1.451-4 Section...451-4 Accounting for redemption of trading stamps and coupons. (a) In general... If an accrual method taxpayer issues trading stamps or premium coupons with...

  11. 41 CFR 101-25.103-4 - Disposition of promotional materials, trading stamps, or bonus goods.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...Disposition of promotional materials, trading stamps, or bonus goods. 101-25...Disposition of promotional materials, trading stamps, or bonus goods. (a) Agencies...for transfer of promotional materials, trading stamps, or bonus goods,...

  12. 26 CFR 1.451-4 - Accounting for redemption of trading stamps and coupons.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... false Accounting for redemption of trading stamps and coupons. 1.451-4 Section...451-4 Accounting for redemption of trading stamps and coupons. (a) In general... If an accrual method taxpayer issues trading stamps or premium coupons with...

  13. 41 CFR 101-25.103-4 - Disposition of promotional materials, trading stamps, or bonus goods.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...Disposition of promotional materials, trading stamps, or bonus goods. 101-25...Disposition of promotional materials, trading stamps, or bonus goods. (a) Agencies...for transfer of promotional materials, trading stamps, or bonus goods,...

  14. 26 CFR 1.451-4 - Accounting for redemption of trading stamps and coupons.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... false Accounting for redemption of trading stamps and coupons. 1.451-4 Section...451-4 Accounting for redemption of trading stamps and coupons. (a) In general... If an accrual method taxpayer issues trading stamps or premium coupons with...

  15. Scien&fic Achievement So/, reusable stamps are fabricated and used to

    E-print Network

    Faraon, Andrei

    Scien&fic Achievement So/, reusable stamps are fabricated and used to pa lithography and replicate elastomeric stamps. ­ Nanoscale pa:erns by near, & Peel: Soft Triangular Stamps for Nanotexturing Work was performed at Univ. of Illinois

  16. Time Stamp Synchronization of Distributed Sensor Logs: Impossibility Results and Approximation Algorithms

    E-print Network

    California at Davis, University of

    Time Stamp Synchronization of Distributed Sensor Logs: Impossibility Results and Approximation 2005 ii #12;Time Stamp Synchronization of Distributed Sensor Logs: Impossibility Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1.1 Clocks and time stamps . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1.2 Log

  17. Non-Photolithographic Methods for Fabrication of Elastomeric Stamps for Use in Microcontact Printing

    E-print Network

    Tien, Joe

    Non-Photolithographic Methods for Fabrication of Elastomeric Stamps for Use in Microcontact that generate patterned relief structures for casting the elastomeric stamps required in microcontact printing were also useful as masters. Microcontact printing with poly- (dimethylsiloxane) stamps cast from

  18. Wege in die Zukunft

    NASA Astrophysics Data System (ADS)

    Kauermann, Göran; Mosler, Karl

    Die Zukunft stellt große Herausforderungen an die Arbeit der Deutschen Statistischen Gesellschaft. Sie betreffen die gestiegenen Anforderungen der Nutzer von Statistik, die Kommunikationsmöglichkeiten des Internets sowie die Dynamik der statistischen Wissenschaften und ihrer Anwendungsgebiete. Das Kapitel 5 beschreibt, wie sich die Gesellschaft diesen Herausforderungen stellt und welche Ziele sie sich in der wissenschaftlichen Zusammenarbeit und im Kampf gegen das Innumeratentum gesetzt hat.

  19. Characteristics of Food Stamp Households: Fiscal Year 2001.

    ERIC Educational Resources Information Center

    Rosso, Randy

    The Food Stamp Program (FSP) provides millions of Americans with the means to purchase food for a nutritious diet. This report presents characteristics of food stamp households nationwide in fiscal year 2001. Information on household characteristics comes from FSP household data collected by the federal Food and Nutrition Service for quality…

  20. Time Stamp Students Page 1 Using time Information Management (TIM)

    E-print Network

    Crews, Stephen

    Time Stamp Students Page 1 Using time Information Management (TIM) Time Stamp Employees University of North Carolina at Chapel Hill University of North Carolina Time Information Management (TIM) EPA Exempt Employees Using Time Information Management (TIM) Time EPA Employees are Exempt and paid on a Salary basis

  1. Three-dimensional toolsforanalysis andconservation of ancient wooden stamps

    Microsoft Academic Search

    R Seulin; F Nicolierb

    2006-01-01

    This paper deals with the analysis and conservation of ancient wooden stamps from museum or library collections. The aim is to provide historians with tools that ease the process of handling and observation of very fragile and unique objects. By performing a three- dimensional imaging of stamps, data are processed in three different ways: (1) adaptive thresholding on the corresponding

  2. Why Can't Psychology Get a Stamp?

    Microsoft Academic Search

    Ludy T. Benjamin Jr

    2003-01-01

    In the latter half of the 1980s as the centennial of the American Psychological Association approached, the APA organized an effort to persuade the United States Postal Service to issue a stamp recognizing the contributions of psychology to the quality of life in America. That effort failed. The history of psychology and psychologists represented on stamps worldwide is described, as

  3. The Formability of Friction Stir Welds in Automotive Stamping Environments

    Microsoft Academic Search

    Glenn J. Grant; Richard W. Davies; Elizabeth V. Stephens; scott wazny; Leon Kaunitz; D. Waldron

    2005-01-01

    Automobile body and truck cab structures are composed primarily of stampings formed from monolithic and constant gage blanks. Cost and weight penalties can arrise when strength or other requirements in one small area of the part leads to the use of a material or gage that is overmatched to the needs of the rest of the stamping. Tailor Welded Blanks

  4. Stamping of automotive components: a numerical and experimental investigation

    Microsoft Academic Search

    M. B. Silva; R. M. S. O. Baptista; P. A. F. Martins

    2004-01-01

    Stamping of automotive components is a critical activity characterized by short lead times and constant technological modifications in order to improve quality and reduce manufacturing costs. Virtual manufacturing of automotive stamped components by means of finite element computer analysis is a powerful tool that can help engineers solving different technological problems.This paper presents applications of finite element analysis on the

  5. The Formability of Friction Stir Welds in Automotive Stamping Environments

    Microsoft Academic Search

    Glenn J. Grant; Richard W. Davies; Elizabeth V. Stephens; Scott Wazny; Leon Kaunitz; Douglas J. Waldron

    2006-01-01

    Automobile body and truck cab structures are composed primarily of stampings formed from monolithic and constant gage blanks. Cost and weight penalties can arise when strength or other requirements in one small area of the part leads to the use of a material or gage that is overmatched to the needs of the rest of the stamping. Tailor Welded Blanks

  6. Stamp Duties In Indian States: A Case for Reform

    Microsoft Academic Search

    Arbind Modi; Patricia Annez; James Alm

    2004-01-01

    Alm, Annez, and Modi review the options for reform of stamp duties on immovable property transfers collected by Indian state governments. After briefly reviewing some of the many administrative difficulties experienced with the tax, they turn to an examination of its economic impacts. A review of stamp duties internationally indicates that Indian rates are exceptionally high, at rates often above

  7. Design for Stamping: a Group Technology-based Approach

    Microsoft Academic Search

    Corrado Poli; Prashant Mahajan; Pratip Dastidar; Robert J. Graves

    1993-01-01

    The design of parts for metal stamping is often accomplished following a rules-of-thumb-based design process. The approach descnbed here, as part of a broader design for manufacturability (DFM) strategy, is based upon detailed models in contrast to rules of thumb and is developed through extensive interactions with toolmakers and stampers. The design for stamping (DFS) system includes consideration of costs

  8. Fabrication of stamps for microcontact printing by injection molding

    Microsoft Academic Search

    Amol Chandekar; Michael Alabran; Sandip K. Sengupta; Jun S. Lee; Joey L. Mead; Carol M. F. Barry; James E. Whitten; Sivasubramanian Somu; Ahmed A. Busnaina

    2008-01-01

    Microcontact printing has been shown to be a viable lithographic technique for the fabrication of a variety of microelectronic components, including source\\/drain and gate electrodes for organic field effect transistors. Future manufacturing efforts may require a means of mass producing stamps for this process. In the present work, stamps for microcontact printing were rapidly produced by injection molding a commercial

  9. Prototype tryout and die design for automotive parts using welded blank hydroforming

    Microsoft Academic Search

    Y. S Shin; H. Y Kim; B. H Jeon; S. I Oh

    2002-01-01

    Hydroforming is the technology that utilizes hydraulic pressure to form tube and sheet materials into desired shapes inside die cavities. It can be characterized as tube hydroforming and sheet hydroforming depending on the shape of used blank. Hydroforming offers several advantages as compared with conventional manufacturing via stamping and welding, such as part consolidation, weight reduction, improved structural strength and

  10. Postal Service unveils new space stamps at KSC

    NASA Technical Reports Server (NTRS)

    1998-01-01

    The U.S. Postal Service unveils its newest series of stamps, Space Discovery, at the KSC Visitor Complex. The event coincided with NASA's 40th anniversary on this date. Participating in the unveiling are (left to right) Barry Ziehl, U.S. Postal Service; JoAnn Morgan, KSC associate director of advanced development and shuttle upgrades; Karla Corcoran, Postal Service inspector general; Kristene A. Graves, a student from Lewis Carroll Elementary School ; and Dr. Donald Thomas, astronaut and veteran of four Shuttle missions. Behind them is the mockup of an orbiter. During the ceremony, Kristene read her essay 'My Stamp Adventure' that she had written for an area-wide contest for the event. The stamps were designed by renowned aerospace artist Attila Heija. The strip of five individual stamps together make up a futuristic scene complete with space vehicles, a futuristic space city, and space explorers. The stamps are available nationwide beginning Oct. 1.

  11. Postal Service unveils new space stamps at KSC

    NASA Technical Reports Server (NTRS)

    1998-01-01

    Applauding the unveiling of the U.S. Postal Service's newest series of stamps, Space Discovery, are are (left to right) Barry Ziehl, U.S. Postal Service; JoAnn Morgan, KSC associate director of advanced development and shuttle upgrades; Karla Corcoran, Postal Service inspector general; Kristene A. Graves, a student from Lewis Carroll Elementary School; and Dr. Donald Thomas, astronaut and veteran of four Shuttle missions. During the ceremony, Kristene read her essay 'My Stamp Adventure' that she had written for an area-wide contest for the event. The unveiling took place at the KSC Visitor Complex and coincided with NASA's 40th anniversary on this date. Behind the large display can be seen the mockup of an orbiter. The stamps were designed by renowned aerospace artist Attila Heija. The strip of five individual stamps together make up a futuristic scene complete with space vehicles, a futuristic space city, and space explorers. The stamps are available nationwide beginning Oct. 1.

  12. Building upon patterned organic monolayers produced via catalytic stamp lithography.

    PubMed

    Mizuno, Hidenori; Buriak, Jillian M

    2010-08-01

    Soft lithographic sub-100 nm chemical patterning was demonstrated on organic monolayer surfaces using poly(dimethylsiloxane)-based stamps decorated with Pd nanostructures, structures termed "catalytic stamps". Chemically reactive azide or alkene functionalities were incorporated on oxide-capped silicon surfaces and utilized for patterning via Pd-catalyzed hydrogenation or Heck reactions. The catalytic stamps were soft lithographic stamps based on PDMS with embedded nanoscale palladium catalysts, prepared via block copolymer-based templating. Nanoscale chemical patterns were readily generated on the azide or alkene precursor surfaces simply by applying the Pd catalytic stamps and the reactive molecule, the molecular ink, to the surface, thanks to the highly localized catalytic transformations induced by the patterned, immobilized solid Pd catalysts. A series of successful postfunctionalization reactions on the resulting patterned surfaces further demonstrated the utility of this approach to construct novel designs of nanoarchitectures, with potentially unique and innovative properties. PMID:20735101

  13. Auto Body Stamping Robust Design Approach and Application

    NASA Astrophysics Data System (ADS)

    Zhong-qin, Lin; Bo, Hou; Shu-hui, Li; Zhong-qi, Yu; Yi-xi, Zhao

    2011-08-01

    The uncertainties in the auto body stamping process affect the stamping quality significantly. The current stamping simulation and optimization may lead to design failure without considering these uncertainties. A systematic stamping robust design approach is proposed. The variation behavior of the local auto sheet properties is analyzed, and the parameters are obtained. A stochastic analysis method is developed, where FE-simulation, uniform design, response surface methodology (RSM) and Monte-Carlo simulation are used. The robust optimization model composed of mean and standard deviation is constructed and solved. The proposed approach is verified through feature box and deck lid inner panel forming process. The developed approach offers rapid and reliable results for engineers to deal with potential stamping problems during the early phase of product and tooling design, saving more time and resources.

  14. Stamping Techniques for Micro- and Nanofabrication

    NASA Astrophysics Data System (ADS)

    Menard, Etienne; Rogers, John

    Soft-lithographic techniques that use rubber stamps and molds provide simple means to generate patterns with lateral dimensions that can be much smaller than one micron and can even extend into the single nanometer regime. These methods rely on the use of soft elastomeric elements typically made out of the polymer poly(dimethylsiloxane). The first section of this chapter presents the fabrication techniques for these elements together with data and experiments that provide insights into the fundamental resolution limits. Next, several representative soft-lithography techniques based on the use of these elements are presented: (i) microcontact printing, which uses molecular 'inks' that form self-assembled monolayers, (ii) near- and proximity-field photolithography for producing two- and three-dimensional structures with subwavelength resolution features, and (iii) nano-transfer printing, where soft or hard stamps print single or multiple layers of solid inks with feature sizes down to 100 nm. The chapter concludes with descriptions of some device-level applications that highlight the patterning capabilities and potential commercial uses of these techniques.

  15. Laser and focused ion beam combined machining for micro dies.

    PubMed

    Yoshida, Y; Okazaki, W; Uchida, T

    2012-02-01

    We have developed a laser and focused ion beam (FIB) compound process for press mold dies of a micro lens array (MLA) and a micro needle array (MNA) in a glassy carbon (GC). The press mold die of the MLA was roughly fabricated by UV-YAG laser. After this process, we finished this surface by scanning FIB. As a result, higher accuracy and good roughness of surface profile can be realized. An optical glass is used to confirm the shape of lens. Moreover, we fabricated 6 × 6 through-holes in the GC by the spiral drilling in addition to the focus position movement of the UV laser for press mold die of the MNA. After the FIB process, we were able to make the needle die of surface and hole wall roughness less than 0.9 ?m. A silicon rubber is used to confirm the shape of the holes. PMID:22380333

  16. Earthquake on a stamp: Emil Wiechert honored

    NASA Astrophysics Data System (ADS)

    Barckhausen, Udo; Rudloff, Alexander

    2012-02-01

    To commemorate the 150th birthday of Emil Wiechert, one of the world's first professors of geophysics, the German Federal Ministry of Finance issued a stamp; on it, Wiechert, who was born 26 December 1861, is standing behind one of his famous seismographs and a seismogram of the 1906 San Francisco earthquake recorded at the geophysical institute of the University of Göttingen (Figure 1). Wiechert was born in 1861 in the city of Tilsit, northeastern Prussia (now Sovetsk, Russia). In 1881 he enrolled at the university in the nearby city of Königsberg (now Kaliningrad, Russia), where he studied physics and received his doctoral degree in 1889. From 1890 to 1897 Wiechert worked as an assistant at the Institute of Physics at Königsberg University and during this time made himself a name in theoretical and experimental research.

  17. Authentication, Time-Stamping and Digital Signatures

    NASA Technical Reports Server (NTRS)

    Levine, Judah

    1996-01-01

    Time and frequency data are often transmitted over public packet-switched networks, and the use of this mode of distribution is likely to increase in the near future as high-speed logical circuits transmitted via networks replace point-to-point physical circuits. ALthough these networks have many technical advantages, they are susceptible to evesdropping, spoofing, and the alteration of messages enroute using techniques that are relatively simple to implement and quite difficult to detect. I will discuss a number of solutions to these problems, including the authentication mechanism used in the Network Time Protocol (NTP) and the more general technique of signing time-stamps using public key cryptography. This public key method can also be used to implement the digital analog of a Notary Public, and I will discuss how such a system could be realized on a public network such as the Internet.

  18. High volume manufacturing of nanoimprint lithography produced devices: addressing the stamp supply challenge

    Microsoft Academic Search

    Ye Zhou; Mohamed Asbahi; Gang Luo; Torbjörn Eriksson; Shoko Yamada; Prasanna Venkatesh Krishnan; Babak Heidari

    2010-01-01

    In order to realize industrial level manufacturing using Nano Imprint Lithography, one of the key challenges is to supply stamps for the high volume machines. The master stamp is typically time consuming to produce and thus very expensive. It is therefore preferable to produce the maximum amount of replicated stamp from a master and to ensure that each stamp replica

  19. State Fiscal Substitution Between the Federal Food Stamp Program and AFDC, Medicaid, and SSI

    Microsoft Academic Search

    Howard Chernick

    1999-01-01

    This paper addresses the fiscal behavior of states in response to the Federal Food Stamp program (FSP). The effectiveness of the Food Stamp Program in increasing the economic well-being of recipients is dependent, in part, on the fiscal behavior of states. Because most Food Stamp recipients are also eligible for other transfer progrmas, and Food Stamps is a nationally funded

  20. Submicron Contact Printing on Silicon Using Stamp Pads T. Pompe, A. Fery, and S. Herminghaus*

    E-print Network

    Ludwig-Maximilians-Universität, München

    Submicron Contact Printing on Silicon Using Stamp Pads T. Pompe, A. Fery, and S. Herminghaus* Max to prepare silicone rubber stamps, which are found to peel off the master easily even at wedge angles of 80. At these small scales, capillary condensation in the wedges of the stamp during the stamping process is difficult

  1. Nondestructive forensic analysis of antique stamps by use of synchrotron radiation infrared spectromicroscopy

    E-print Network

    Nondestructive forensic analysis of antique stamps by use of synchrotron radiation infrared" stamps. This series of stamps was printed and issued over 25 years by a single source, but were printed-analytical methods are subjective, more art than science, and may affect the rarity and price of the stamps

  2. Micropatterned agarose gels for stamping arrays of proteins and gradients of proteins

    E-print Network

    Prentiss, Mara

    Micropatterned agarose gels for stamping arrays of proteins and gradients of proteins Michael Mayer of planar microarrays and gradients of proteins using patterned agarose stamps. It demonstrates: (i) on pat- terned agarose stamps with one or multiple (here, eight) proteins and repetitive stamping

  3. Stamp printing of silicon-nanomembrane-based photonic devices onto flexible

    E-print Network

    Chen, Ray

    Stamp printing of silicon-nanomembrane-based photonic devices onto flexible substrates March 8, 2012 In this Letter, we demonstrate for the first time (to our best knowledge) stamp printing with the help of an elasto- meric stamp. The adhesion between the stamp and the SiNM can be kinetically

  4. Stamp printing of silicon-nanomembrane-based photonic devices onto flexible

    E-print Network

    Chen, Ray

    Stamp printing of silicon-nanomembrane-based photonic devices onto flexible substrates, we demonstrate for the first time (to our best knowledge) stamp printing of silicon nanomembrane (Si other foreign sub- strates with the help of an elastomeric stamp. The adhe- sion between the stamp

  5. SPA Non-Exempt Permanent using Time Stamp Page 1 Using time Information Management (TIM)

    E-print Network

    Crews, Stephen

    SPA Non-Exempt Permanent using Time Stamp Page 1 Using time Information Management (TIM) Time Stamp Management (TIM) SPA Non-Exempt Employees Time Stamp Using Time Information Management (TIM) Time SPA Non per week. Time Stamp has been selected by specific departments, this method of keeping time records

  6. Tool design and process tests of hot stamping for advanced high strength steels

    Microsoft Academic Search

    Jianping Lin; Junying Min; Zhou Xu; Wenhua Bao

    2010-01-01

    Application of hot stamping technology of advanced high strength steel is one of the effective approaches for automotive light-weighting. It is important to investigate the effects of hot stamping process parameters on forming quality for the application of hot stamping technology. A kind of hot stamping tool system for process tests of U-shape sample is introduced. It includes cooling system

  7. Apparatus for restraining and transporting dies

    DOEpatents

    Allison, James W. (Monroeville, PA); LaBarre, Timothy L. (Pittsburgh, PA)

    1994-01-01

    Apparatus for restraining and transporting dies in punch press operations is provided. A floatation platen for supporting a die on the platen's upper surface has a plurality of recessed gas exhaust ports on the platen's lower surface. A source of pressurized gas delivers gas to a platen manifold, for delivery to orifices located in the gas exhaust ports. The flow of gas is controlled by a first valve adjacent the gas source and a second valve adjacent the manifold, with the second valve being used to control the gas flow during movement of the die. In this fashion, a die may be moved on a cushion of air from one workstation to a selected second workstation. A moveable hydraulically operated restraining fixture is also provided, for clamping the die in position during the compacting phase, and for releasing the die after completion of the compacting phase by releasing the hydraulic pressure on the restraining fixture. When pressure in the hydraulic cylinders on the restraining fixture is reversed, the restraining fixture will retract so that there is no contact between the die and the restraining fixture, thereby allowing the die to be removed from a first workstation and moved to a second selected workstation.

  8. Energy Consumption of Die Casting Operations

    SciTech Connect

    Jerald Brevick; clark Mount-Campbell; Carroll Mobley

    2004-03-15

    Molten metal processing is inherently energy intensive and roughly 25% of the cost of die-cast products can be traced to some form of energy consumption [1]. The obvious major energy requirements are for melting and holding molten alloy in preparation for casting. The proper selection and maintenance of melting and holding equipment are clearly important factors in minimizing energy consumption in die-casting operations [2]. In addition to energy consumption, furnace selection also influences metal loss due to oxidation, metal quality, and maintenance requirements. Other important factors influencing energy consumption in a die-casting facility include geographic location, alloy(s) cast, starting form of alloy (solid or liquid), overall process flow, casting yield, scrap rate, cycle times, number of shifts per day, days of operation per month, type and size of die-casting form of alloy (solid or liquid), overall process flow, casting yield, scrap rate, cycle times, number of shifts per day, days of operation per month, type and size of die-casting machine, related equipment (robots, trim presses), and downstream processing (machining, plating, assembly, etc.). Each of these factors also may influence the casting quality and productivity of a die-casting enterprise. In a die-casting enterprise, decisions regarding these issues are made frequently and are based on a large number of factors. Therefore, it is not surprising that energy consumption can vary significantly from one die-casting enterprise to the next, and within a single enterprise as function of time.

  9. OVERVIEW OF STAMP MILL SITE,LOOKING SOUTHWEST. THE LOWER TRAM TERMINAL ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    OVERVIEW OF STAMP MILL SITE,LOOKING SOUTHWEST. THE LOWER TRAM TERMINAL IS OUT OF FRAME, JUST TO THE RIGHT. WATER TANK, LOADING PLATFORM, AND TRAM TRESTLE LEADING UP TO THE TRAM TERMINAL ARE AT RIGHT. THE STRUCTURE AT EXTREME RIGHT BELOW THE TRESTLE, ARE REMAINS OF A SECONDARY ORE BIN, WITH BALL MILL FOUNDATIONS AND WOOD DEBRIS JUST BELOW ON THE SECOND LEVEL. AT CENTER IS A BOILER AND THE FRAME WORK OF A FILTER PRESS. THE SMALL STRUCTURE AT CENTER LEFT IS AN INTERPRETIVE SIGN PLACED BY THE PARK SERVICE. AT LOWER LEFT, THIRD LEVEL OF THE MILL, ARE THE REMAINS OF A BLACKSMITH'S FORGE. - Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley Junction, Inyo County, CA

  10. Hunting for Metamorphic Engines Wing Wong and Mark Stamp

    E-print Network

    Stamp, Mark

    Hunting for Metamorphic Engines Wing Wong and Mark Stamp Department of Computer Science San Jos by the authors at Defcon 14, August 5, 2006, Las Vegas, Nevada. #12;How different are the resulting morphed

  11. 27 CFR 479.161 - National Firearms Act stamps.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.161 National Firearms Act...

  12. 27 CFR 479.161 - National Firearms Act stamps.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.161 National Firearms Act...

  13. 27 CFR 479.161 - National Firearms Act stamps.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.161 National Firearms Act...

  14. 27 CFR 479.161 - National Firearms Act stamps.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.161 National Firearms Act...

  15. 27 CFR 479.161 - National Firearms Act stamps.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.161 National Firearms Act...

  16. Potential technologies based on stamped periodic nanoparticle array

    E-print Network

    Wang, Zongbin

    2009-01-01

    A stamped nanoparticle array patterning technology integrating interference lithography, self assembly and soft lithography is assessed. This technology is capable of parallel patterning of nanoparticles at a large scale. ...

  17. To Pluto from a First-Class Postage Stamp

    NASA Technical Reports Server (NTRS)

    Staehle, R.; Terrile, R.; Weinstein, S.

    1993-01-01

    The first mission to Pluto is presently under development at NASA's Jet Propulsion Laboratory. Inspired by a nagging 29-cent postage stamp, the mission concept began with a chance conversation between two engineers.

  18. Date Stamp:___________ (for office use only) Undergraduate Travel Application Checklist

    E-print Network

    Fernandez, Eduardo

    of attendance at the conference/competition Saved itinerary and a copy of the air travel ticket or e1 Date Stamp:___________ (for office use only) Undergraduate Travel Application Checklist Cover Organization Name: ______________________________________________ If travelling as a Student Organization, how

  19. 164. Photocopied July 1978. VIEW OF STEAMTURBINE BUILDING AT STAMP ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    164. Photocopied July 1978. VIEW OF STEAM-TURBINE BUILDING AT STAMP MILL. BUILDING CONSTRUCTED IN 1921 TO USE EXHAUST STEAM TO GENERATE ELECTRICITY. C. 1925. - Quincy Mining Company, Hancock, Houghton County, MI

  20. 48. DETAIL OF STAMP BATTERIES CAMS, TAPPETS AND STEMS WITH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    48. DETAIL OF STAMP BATTERIES CAMS, TAPPETS AND STEMS WITH SIX FOOT SCALE, LOOKING NORTH NORTHWEST. SEE CA-290-24 FOR IDENTICAL B&W NEGATIVE. - Skidoo Mine, Park Route 38 (Skidoo Road), Death Valley Junction, Inyo County, CA

  1. 47. DETAIL OF UPPER STAMP BATTERIES CAMS, TAPPETS AND STEMS, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    47. DETAIL OF UPPER STAMP BATTERIES CAMS, TAPPETS AND STEMS, LOOKING NORTH NORTHWEST. SEE CA-290-22 FOR IDENTICAL B&W NEGATIVE. - Skidoo Mine, Park Route 38 (Skidoo Road), Death Valley Junction, Inyo County, CA

  2. 22. DETAIL OF UPPER STAMP BATTERIES CAMS, TAPPETS AND STEMS, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. DETAIL OF UPPER STAMP BATTERIES CAMS, TAPPETS AND STEMS, LOOKING NORTH NORTHWEST. SEE CA-290-47 (CT) FOR IDENTICAL COLOR TRANSPARENCY. - Skidoo Mine, Park Route 38 (Skidoo Road), Death Valley Junction, Inyo County, CA

  3. 24. DETAIL OF STAMP BATTERIES CAMS, TAPPETS AND STEMS WITH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    24. DETAIL OF STAMP BATTERIES CAMS, TAPPETS AND STEMS WITH SIX FOOT SCALE, LOOKING NORTH NORTHWEST. SEE CA-290-48 (CT) FOR IDENTICAL COLOR TRANSPARENCY. - Skidoo Mine, Park Route 38 (Skidoo Road), Death Valley Junction, Inyo County, CA

  4. 141. Photocopied July 1978, (HCHS) DETAIL OF QUINCY STAMP MILL; ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    141. Photocopied July 1978, (HCHS) DETAIL OF QUINCY STAMP MILL; PORTION OF 1873 BIRD'S-EYE VIEW OF HANCOCK, MICHIGAN PUBLISHED BY A. J. CLEVELAND. - Quincy Mining Company, Hancock, Houghton County, MI

  5. 7 CFR 273.25 - Simplified Food Stamp Program.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Agriculture Regulations of the Department of Agriculture (Continued) FOOD AND NUTRITION SERVICE, DEPARTMENT OF AGRICULTURE FOOD STAMP AND FOOD DISTRIBUTION PROGRAM CERTIFICATION OF ELIGIBLE HOUSEHOLDS § 273.25 Simplified...

  6. Tooling-integrated sensing systems for stamping process monitoring

    Microsoft Academic Search

    Numpon Mahayotsanun; Sripati Sah; Jian Cao; Michael Peshkin; Robert X. Gao; Chuan-tao Wang

    2009-01-01

    In-situ stamping process monitoring plays a critical role in enhancing productivity and ensuring part quality in sheet metal stamping. This paper investigates the realization of two sensing methods to create a tooling-integrated sensing system: mutual inductance-based displacement measurement for sheet draw-in, and distributed contact pressure measurement at the tool–workpiece interface. The two sensing systems are complementary in nature, and together,

  7. DNA microarray synthesis by using PDMS molecular stamp (II)

    Microsoft Academic Search

    Pengfeng Xiao; Nongyue He; Quanguo He; Chunxiu Zhang; Yiwen Wang; Zuhong Lu; Jiqing Xu

    2001-01-01

    Based on the standard phosphoramidites chemistry protocol, two oligonucleotides synthetic routes were studied by contact stamping\\u000a reactants to a modified glass slide. Route A was a contact coupling reaction, in which a nucleoside monomer was transferred\\u000a and coupled to reactive groups (OH) on a substrate by spreading the nucleoside activated with tetrazole on a polydimethylsiloxane\\u000a (PDMS) stamp. Route B was

  8. Digital time stamping system based on open source technologies

    Microsoft Academic Search

    R. Miskinis; D. Smirnov; E. Urba; A. Burokas; B. Malysko; P. Laud; F. Zuliani

    2009-01-01

    A digital time stamping system (the BALTICTIME system) was developed by using the open source technologies and was adopted to meet the egovernmental applications, where legal and accountable time stamps are essential. All components of the BALTICTIME system were developed by using the open source software technologies LINUX-UBUNTU, OpenTSA, OpenSSL, MySQL and are designed to suit the hardware, which is

  9. Experimental study of heat transfer in hot stamping process

    Microsoft Academic Search

    B. Abdulhay; B. Bourouga; C. Dessain; G. Brun; J. Wilsius

    2009-01-01

    Hot stamping and quenching of boron steel is a novel technology to produce structural automotive parts with an excellent crash\\u000a performance. It offers the opportunity to produce thinner parts with complex shapes and higher mechanical properties. In order\\u000a to increase the simulation expertise of the hot stamping process,, an experimental device has been designed and developed\\u000a to accurately measure the

  10. Method for optimizing the cooling design of hot stamping tools

    Microsoft Academic Search

    Heinz Steinbeiss; Hyunwoo So; Thomas Michelitsch; Hartmut Hoffmann

    2007-01-01

    During the past years hot-stamped components have gained considerable importance in the automotive industry. This is due to\\u000a the advantageous properties involved, such as good crash behavior and high strength. In the production of hot-stamped components\\u000a the blank is rapidly cooled by the tool. This exerts an important influence on the final properties and the process time.\\u000a The tool is

  11. Postage stamps: A convergence of metallurgy, art, and history

    Microsoft Academic Search

    Fathi Habashi

    2002-01-01

    Postage stamps have been used around the world to commemorate, in miniature, significant events and people, including those\\u000a of importance in the history of metals and mineral production. From the presence of gold artifacts in an ancient Egyptian\\u000a tomb to the role of uranium in nuclear power, stamps have captured the evolution of metallurgical processes. This article\\u000a highlights some of

  12. Identifying Sources of Variation in Sheet Metal Stamping

    Microsoft Academic Search

    Karl D. Majeske; Patrick C. Hammett

    2003-01-01

    Manufacturers using traditional process control charts to monitor their sheet metal stamping processes often encounter out-of-control signals indicating that the process mean has changed. Unfortunately, a sheet metal stamping process does not have the necessary adjustability in its process variable input settings to allow easily correcting the mean response in an out-of-control condition. Hence the signals often go ignored. Accordingly,

  13. Spacecraft Trajectory Analysis and Mission Planning Simulation (STAMPS) Software

    NASA Technical Reports Server (NTRS)

    Puckett, Nancy; Pettinger, Kris; Hallstrom,John; Brownfield, Dana; Blinn, Eric; Williams, Frank; Wiuff, Kelli; McCarty, Steve; Ramirez, Daniel; Lamotte, Nicole; Vu, Tuan

    2014-01-01

    STAMPS simulates either three- or six-degree-of-freedom cases for all spacecraft flight phases using translated HAL flight software or generic GN&C models. Single or multiple trajectories can be simulated for use in optimization and dispersion analysis. It includes math models for the vehicle and environment, and currently features a "C" version of shuttle onboard flight software. The STAMPS software is used for mission planning and analysis within ascent/descent, rendezvous, proximity operations, and navigation flight design areas.

  14. Stamp Foldings, Semi-meanders, and Open Meanders: Fast Generation By considering a permutation representation for stamp-foldings and semi-meanders we construct tree-

    E-print Network

    Sawada, Joe

    Stamp Foldings, Semi-meanders, and Open Meanders: Fast Generation Algorithms J. Sawada R. Li Abstract By considering a permutation representation for stamp-foldings and semi-meanders we construct tree-meanders can be modified to produce the fastest known algorithm to generate open meanders. Keywords: Stamp

  15. Crack-Free, Nondistorting Can For Hot Isostatic Pressing

    NASA Technical Reports Server (NTRS)

    Juhas, John J.

    1991-01-01

    New method of canning specimens made of composites of arc-sprayed and plasma-sprayed tape reduces outgassing and warping during hot isostatic pressing. Produces can having reliable, crack-free seal and thereby helps to ensure pressed product of high quality. Specimen placed in ring of refractory metal between two face sheets, also of refractory metal. Assembly placed in die in vacuum hot press, where simultaneously heated and pressed until plates become diffusion-welded to ring, forming sealed can around specimen. Specimen becomes partially densified, and fits snugly within can. Ready for further densification by hot isostatic pressing.

  16. The effect of engineered surface texture on sheet aluminum formability

    Microsoft Academic Search

    Glenn William Jarvis

    1998-01-01

    In industrial sheet metal forming many variables affect the stamping of an acceptable part. These include mechanical properties of the sheet metal, part design, die design, lubrication, stamping press, surface condition, etc. Attempts to control many of these variables have been made, but in general the sheet metal stamping process is still more art than science. Part and die design

  17. Die Deformation Measurement System during Sheet Metal Forming

    NASA Astrophysics Data System (ADS)

    Funada, J.; Takahashi, S.; Fukiharu, H.

    2011-08-01

    In order to reduce affection to the earth environment, it is necessary to lighten the vehicles. For this purpose, high tensile steels are applied. Because of high strength, high forming force is required for producing automotive sheet metal parts. In this situation, since the dies are elastic, they are deformed during forming parts. For reducing die developing period, sheet metal forming simulation is widely applied. In the numerical simulation, rigid dies are usually used for shortening computing time. It means that the forming conditions in the actual forming and the simulation are different. It will make large errors in the results between actual forming and simulation. It can be said that if contact pressure between dies and a sheet metal in the simulation can be reproduced in the actual forming, the differences of forming results between them can also been reduced. The basic idea is to estimate die shape which can produce the same distribution as computed from simulation with rigid dies. In this study, die deformation analyses with Finite Element Method as basic technologies are evaluated. For example, simple shape and actual dies elastic contact problems were investigated. The contact width between simple shape dies was investigated. The computed solutions were in good agreement with experimental results. The one case of the actual dies in two cases was also investigated. Bending force was applied to the blank holder with a mechanical press machine. The methodology shown with applying inductive displacement sensor for measuring die deformation during applying force was also proposed.

  18. MIT Press

    NSDL National Science Digital Library

    The editors and staff of The MIT Press, invite you to browse through their on-line catalogues featuring recent books (1993-1994) and current journals. The MIT Press is one of the world's leading scholarly technical publishers, offering texts and monographs in the computational and cognitive sciences, architecture, photography, art and literary theory, economics, environmental science, and linguistics.

  19. Physical modeling of equal channel angular pressing using plasticine

    Microsoft Academic Search

    R. Manna; Pulkit Agrawal; Sushant Joshi; Basavakumar K. Mudda; N. K. Mukhopadhyay; G. V. S. Sastry

    2005-01-01

    We report here the results of our physical modeling study of the equal channel angular pressing process using two-colour constituent plasticine workpieces in a metallic die. The workpieces, usually called billets, are made up of discs as well as spherical balls. They are deformed repeatedly with and without changing the orientation between successive passes. Both square and round dies with

  20. A clinical experience of ‘STAMP’ plate-guided Bonebridge implantation

    PubMed Central

    Matsumoto, Nozomu; Cho, Byunghyun; Ono, Hidenori; Mori, Kentaro; Tsukada, Keita; Ichinose, Aya; Yoshimura, Hidekane; Iwasaki, Satoshi; Komune, Shizuo; Usami, Shin-ichi

    2014-01-01

    Conclusion The surface template-assisted marker positioning (STAMP) method is useful for successful Bonebridge™ (BB) implantation on a planned site while avoiding dangerous positions. Objectives To confirm the usefulness of the STAMP method for the safe operation of BB. Methods From a patient’s temporal bone CT data, a guide plate and confirmation plate were generated by the STAMP method. The guide plate is used to mark the correct place for implantation, while the confirmation plate lets us know the correct angle and depth of the hole. Results With the guide plate, the correct place for BB implantation was easily found. The hole was made to be an appropriate size with the confirmation plate while exposing only a small part of sigmoid sinus as simulated. Finally, the BB implant was successfully placed exactly at the planned site. PMID:25115972

  1. 39. CLOSE UP DETAIL OF THE FEEDER AND STAMP CONNECTION. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    39. CLOSE UP DETAIL OF THE FEEDER AND STAMP CONNECTION. THE STAMP AN MORTAR BOX ARE ON THE LEFT AND THE FEEDER WITH ITS FEEDER DISK IS ON THE RIGHT. NOTE THE COLLAR ON THE CENTER STAMP STEM (UPPER LEFT CORNER OF THE IMAGE) THAT ACTIVATES THE LEVER IN THE CENTER OF THE PHOTO. THE COLLAR IS POSITIONED SUCH THAT WHEN THE LEVEL OF THE MATERIAL REACHES A LOW POINT IN THE MORTAR BOX IT PUSHES DOWN ON THE LEVER WHICH IN TURN ACTIVATES THE AUTOMATIC FEEDER DRIVE MECHANISM WHICH THEM DELIVERS ORE INTO THE BACKSIDE OF THE MORTAR BOX. - Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

  2. 27 CFR 70.332 - Unauthorized use or sale of stamps.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... false Unauthorized use or sale of stamps. 70.332 Section 70.332 Alcohol, Tobacco Products and Firearms ALCOHOL...Tax Crimes, Other Offenses and Forfeitures § 70.332 Unauthorized use or sale of stamps....

  3. 27 CFR 70.332 - Unauthorized use or sale of stamps.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... false Unauthorized use or sale of stamps. 70.332 Section 70.332 Alcohol, Tobacco Products and Firearms ALCOHOL...Tax Crimes, Other Offenses and Forfeitures § 70.332 Unauthorized use or sale of stamps....

  4. 27 CFR 70.332 - Unauthorized use or sale of stamps.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... true Unauthorized use or sale of stamps. 70.332 Section 70.332 Alcohol, Tobacco Products and Firearms ALCOHOL...Tax Crimes, Other Offenses and Forfeitures § 70.332 Unauthorized use or sale of stamps....

  5. A kinematic model for the East African Rift D. Sarah Stamps,1

    E-print Network

    Nocquet, Jean-Mathieu

    A kinematic model for the East African Rift D. Sarah Stamps,1 Eric Calais,1 Elifuraha Saria,2 Chris blocks. Citation: Stamps, D. S., E. Calais, E. Saria, C. Hartnady, J.-M. Nocquet, C. J. Ebinger, and R. M

  6. Integrating XML Linked Time-Stamps in OASIS Digital Signature Services

    Microsoft Academic Search

    Ana Isabel González-tablas Ferreres; Karel Wouters

    2005-01-01

    The technique of electronic time-stamping allows a client to get an electronic proof of the existence of a document at a specific point in time. A simple way to achieve this is to produce a digital signature over the pair (document,time). Linked time-stamps have an advantage over these simple time-stamps because they construct a verifiable link be- tween time-stamps. In

  7. Investigation of Die Stress Profiles during Powder Compaction using Instrumented Die

    SciTech Connect

    Hong, Sung-tae; Hovanski, Yuri; Lavender, Curt A.; Weil, K. Scott

    2008-06-01

    The radial stress profile in a cylindrical die during compaction of titanium (Ti) powder was investigated by experiments. The concept of an instrumented die was extended to design an enhanced instrumented die. Custom-made strain gage pins were used to measure the radial stress during powder compaction. The test fixture was designed to simulate double-action pressing. The measured die stress profile for Ti powder was compared with that for a commercially available iron (Fe) powder. The stress history shows that an appreciable residual stress remains in the die in the radial direction after the axial compaction stress is removed from the powder. Furthermore, the radial stress profile in the die, while under maximum axial compaction stress, is more uniform across the height of the Fe compact than that of the Ti compact. In addition, the residual stress profile in the die in the radial direction reduces symmetrically in both directions beyond the height of the compact for both powders. Finally, the Ti powder shows a significantly higher frictional coefficient at the maximum axial compaction stress, and consequently a higher maximum axial ejection stress than the Fe powder.

  8. Impact Of The Material Variability On The Stamping Process: Numerical And Analytical Analysis

    NASA Astrophysics Data System (ADS)

    Ledoux, Yann; Sergent, Alain; Arrieux, Robert

    2007-05-01

    The finite element simulation is a very useful tool in the deep drawing industry. It is used more particularly for the development and the validation of new stamping tools. It allows to decrease cost and time for the tooling design and set up. But one of the most important difficulties to have a good agreement between the simulation and the real process comes from the definition of the numerical conditions (mesh, punch travel speed, limit conditions,…) and the parameters which model the material behavior. Indeed, in press shop, when the sheet set changes, often a variation of the formed part geometry is observed according to the variability of the material properties between these different sets. This last parameter represents probably one of the main source of process deviation when the process is set up. That's why it is important to study the influence of material data variation on the geometry of a classical stamped part. The chosen geometry is an omega shaped part because of its simplicity and it is representative one in the automotive industry (car body reinforcement). Moreover, it shows important springback deviations. An isotropic behaviour law is assumed. The impact of the statistical deviation of the three law coefficients characterizing the material and the friction coefficient around their nominal values is tested. A Gaussian distribution is supposed and their impact on the geometry variation is studied by FE simulation. An other approach is envisaged consisting in modeling the process variability by a mathematical model and then, in function of the input parameters variability, it is proposed to define an analytical model which leads to find the part geometry variability around the nominal shape. These two approaches allow to predict the process capability as a function of the material parameter variability.

  9. Die betroffenen Religionsgemeinschaften

    Microsoft Academic Search

    Lisa-Maria Bleiler

    \\u000a Um dem zur Entscheidung berufenen Arzt einen Eindruck davon zu vermitteln, weshalb sich der betreffende Patient gegen eine\\u000a bestimmte medizinische Maßnahme entscheidet, sollen im Folgenden drei der Gemeinschaften dargestellt werden, die medizinischen\\u000a Maßnahmen - mehr oder weniger - skeptisch gegenüber stehen: Die Zeugen Jehovas, der Evangelische Brüderverein und die Christian\\u000a Science (Christliche Wissenschaft). Den größten Teil der Darstellung wird die

  10. Time Stamp Student and Temporary Employees Page 1 Using time Information Management (TIM)

    E-print Network

    Crews, Stephen

    Time Stamp Student and Temporary Employees Page 1 Using time Information Management (TIM) Time Stamp Employees University of North Carolina at Chapel Hill Students and Temporary Employees Time Stamp Using Time Information Management (TIM) Time Student and Temporary Employees are paid on an Hourly basis

  11. 41 CFR 101-25.103-3 - Trading stamps or bonus goods received from contractors.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...2012-07-01 2012-07-01 false Trading stamps or bonus goods received from contractors...1-General Policies § 101-25.103-3 Trading stamps or bonus goods received from contractors...reduction clause, any method (such as trading stamps or bonus goods) by...

  12. 41 CFR 101-25.103-3 - Trading stamps or bonus goods received from contractors.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ...2013-07-01 2012-07-01 true Trading stamps or bonus goods received from contractors...1-General Policies § 101-25.103-3 Trading stamps or bonus goods received from contractors...reduction clause, any method (such as trading stamps or bonus goods) by...

  13. Food-stamp use triples as local despair grows By ANA M. VALDES AND ADAM PLAYFORD

    E-print Network

    Belogay, Eugene A.

    Food-stamp use triples as local despair grows By ANA M. VALDES AND ADAM PLAYFORD Palm Beach Post increases every year in the number of individuals using food stamps to feed their families. In Palm Beach County, 161,250 of the county's 1.3 million residents - 12.4 percent - received food stamps in August

  14. The Security Evaluation of Time Stamping Schemes: The Present Situation and Studies

    Microsoft Academic Search

    Masashi UNE

    2001-01-01

    Time stamping is a technique used to prove the existence of certain digital data prior to a specific point in time. With the recent development of electronic commerce, time stamping is now widely recognized as an important technique used to ensure the integrity of digital data for a long time period. Various time stamping schemes and services have been proposed.

  15. STAMP-Based Analysis of a Refinery Overflow Accident Nancy Leveson, Margaret Stringfellow, and John Thomas

    E-print Network

    Leveson, Nancy

    1 STAMP-Based Analysis of a Refinery Overflow Accident Nancy Leveson, Margaret Stringfellow, and John Thomas As an example of STAMP, we have taken an accident report produced for a real refinery overflow accident and reanalyzed it using STAMP. The original accident report is shown in the Appendix

  16. Ring-like DHTs and the Postage Stamp Problem Mahadev Konar and Alexander E. Mohr

    E-print Network

    Mohr, Alexander E.

    Ring-like DHTs and the Postage Stamp Problem Mahadev Konar and Alexander E. Mohr Department structures for Distributed Hash Tables (DHTs) and show that the Postage Stamp Problem (PSP) is equivalent, Postage Stamp Problem, network diameter, finger pointers. Contact: Name: Mahadev Konar Phone: 631 632 1857

  17. 75 FR 23565 - Food Stamp Program: Eligibility and Certification Provisions of the Farm Security and Rural...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-05-04

    ...273 RIN 0584-AD30 Food Stamp Program: Eligibility...Provisions of the Farm Security and Rural Investment...final rule entitled, Food Stamp Program: Eligibility...Provisions of the Farm Security and Rural Investment...final rule entitled, Food Stamp Program: Eligibility...Provisions of the Farm Security and Rural...

  18. STAMP: Toward Reclaiming Email Address Privacy Kurt Ackermann Camille Gaspard Ramana Kompella Cristina Nita-Rotaru

    E-print Network

    Koopman, Philip

    STAMP: Toward Reclaiming Email Address Privacy Kurt Ackermann Camille Gaspard Ramana Kompella to know which untrustworthy parties divulged his address. We propose STAMP, the Solicitation Token to be untrustworthy with their email access. STAMP employs distributed access control, making use of transitive trust

  19. FOOD STAMPS-SUPPLEMENTAL NUTRITION ASSISTANCE PROGRAM 2012-2013 Academic Year

    E-print Network

    Rosen, Jay

    FOOD STAMPS-SUPPLEMENTAL NUTRITION ASSISTANCE PROGRAM (SNAP) 2012-2013 Academic Year What is SNAP "Verification of Food Stamps Received". The Office of Financial Aid must compare information from your FAFSA/we_______________________________________________ received Food-Stamps Supplemental Nutrition Assistance Program (SNAP) for year 2010 or 2011. Check the box

  20. FORMABILITY INVESTIGATIONS FOR THE HOT STAMPING PROCESS Y. Dahan 1&2,*

    E-print Network

    Paris-Sud XI, Université de

    FORMABILITY INVESTIGATIONS FOR THE HOT STAMPING PROCESS Y. Dahan 1&2,* , Y. Chastel 1 , P. Duroux 2 and to optimize the design of hot stamped parts made of USIBOR 1500P® . To provide formability data and to feed the development of a fracture criterion, experimental hot stamping tests are carried out at Cemef (Centre

  1. Valid Visitors' Visa Must have an Entry and Expiry Date Stamp

    E-print Network

    Wagner, Stephan

    Valid Visitors' Visa Must have an Entry and Expiry Date Stamp Block Release Dates Letter from and stamped by Faculty The Form is available from the Faculty Office, Fees Office and the International, signed and stamped at the Fees Office 75% of the annual tuition fee is payable on or before registration

  2. Brief Announcement: Ring-like DHTs and the Postage Stamp Problem

    E-print Network

    Mohr, Alexander E.

    Brief Announcement: Ring-like DHTs and the Postage Stamp Problem Mahadev Konar Stony Brook explore Chord-like ring structures for Distributed Hash Tables (DHTs) and show that the Postage Stamp The Postage Stamp Problem [1] is defined as follows: given k and h, find a set of k denominations S = {S1, S2

  3. Prototyping of Masks, Masters, and Stamps/Molds for Soft Lithography Using an Office Printer and

    E-print Network

    Prentiss, Mara

    Prototyping of Masks, Masters, and Stamps/Molds for Soft Lithography Using an Office Printer a practical method for the fabrication of photomasks, masters, and stamps/molds used in soft lithography to fabricate poly(dimethylsiloxane) (PDMS) stamps/molds for soft lithography. This process can generate micro

  4. EDGE TESSELLATIONS AND THE STAMP FOLDING MATTHEW KIRBY AND RON UMBLE

    E-print Network

    Umble, Ron

    EDGE TESSELLATIONS AND THE STAMP FOLDING PROBLEM MATTHEW KIRBY AND RON UMBLE Abstract. We prove triangle. Of these, the four whose interior angles measure at most 90 solve the "Stamp Folding Problem." How many ways can one con...gure the perforation lines on a sheet of postage stamps so that it folds

  5. Policy Name: Signature Stamps Originating/Responsible Department: Vice-President (Finance and Administration)

    E-print Network

    Dawson, Jeff W.

    Page 1 Policy Name: Signature Stamps Originating/Responsible Department: Vice-President (Finance and Administration) Policy: A person's signature may be affixed by a stamp or other electronic means for the purposes management or similar communications. A signature stamp must not be used for any other purpose, including

  6. For first time since 2007, food stamp use drops in state, Palm Beach County

    E-print Network

    Fernandez, Eduardo

    For first time since 2007, food stamp use drops in state, Palm Beach County March 13, 2013|By Donna Gehrke-White, Sun Sentinel For the first time in nearly six years, the number of people on food stamps." The state also saw an overall decline with the total number of people on food stamps in Florida dropping

  7. Policy Name: Signature Stamps Originating/Responsible Department: Vice-President (Finance and Administration)

    E-print Network

    Carleton University

    Policy Name: Signature Stamps Originating/Responsible Department: Vice-President (Finance and Administration) Policy: A person's signature may be affixed by a stamp or other electronic means for the purposes management or similar communications. A signature stamp must not be used for any other purpose, including

  8. 2012-2013 Parental Verification of Food Stamp or Supplemental Nutrition Assistance Program (SNAP) Benefits

    E-print Network

    2012-2013 Parental Verification of Food Stamp or Supplemental Nutrition Assistance Program (SNAP in your household received food stamps or benefits from the Supplemental Nutrition Assistance Program documentation regarding receipt of food stamp benefits. Please check one: Someone in my parent

  9. Customization of Poly(dimethylsiloxane) Stamps by Micromachining Using a Femtosecond-Pulsed

    E-print Network

    Prentiss, Mara

    Customization of Poly(dimethylsiloxane) Stamps by Micromachining Using a Femtosecond-Pulsed Laser patterned in surface bas-relief is the material most widely used for printing and stamping in soft of PDMS stamps required for all types of problems; printing on spherical surfaces is an example.[4

  10. Joystick Text Entry with Date Stamp, Selection Keyboard, and EdgeWrite

    E-print Network

    Wobbrock, Jacob O.

    1550 Joystick Text Entry with Date Stamp, Selection Keyboard, and EdgeWrite Jacob O. Wobbrock, Brad date stamp and selection keyboard, are selection-based: they require screen real-estate to display implemented joystick versions of date stamp, selection keyboard, and EdgeWrite for the Saitek P2500 game

  11. ENVIRONMENTALLY BENIGN USPS STAMPS: BASELINE PILOT RECYCLING RESULTS D. F. Seiter -Sr. Research Scientist

    E-print Network

    Abubakr, Said

    ENVIRONMENTALLY BENIGN USPS STAMPS: BASELINE PILOT RECYCLING RESULTS D. F. Seiter - Sr. Research Service, in their program to develop postage stamp adhesives that do not adversely affect the environment, have focused considerable efforts on developing a benign PSA stamp product for recycled fine paper

  12. Page 1 of 2 How to Clock in using a Time Stamp & Job Transfers

    E-print Network

    Hutcheon, James M.

    Page 1 of 2 How to Clock in using a Time Stamp & Job Transfers Once you have logged in, you will be able to clock in at the Record Time Stamp. All employees should record accurate time worked each day; therefore, it is important to stamp your time when clocking into work and clock out when leaving. Once you

  13. Modelling the Distribution of Stamp Paper via Finite Normal Mixtures: The 1872 Hidalgo

    E-print Network

    McLachlan, Geoff

    Modelling the Distribution of Stamp Paper Thickness via Finite Normal Mixtures: The 1872 Hidalgo Stamp Issue of Mexico Revisited K.E. BASFORD 1 , G.J. McLACHLAN 2 and M.G. YORK 2 Summary Izenman to the paper thickness of the 1872 Hidalgo Stamp issue of Mexico. They observed an apparent conflict when

  14. Cryptanalysis of Hwang-Chang's a Time-Stamp Protocol for Digital Watermarking

    E-print Network

    1 Cryptanalysis of Hwang-Chang's a Time-Stamp Protocol for Digital Watermarking *Jue-Sam Chou 1-stamping protocol for digit watermarking. They claimed that their scheme is secure against attacks. However. Keywords: Digital watermarks; Copyright protection; Time-stamping 1. Introduction Since the concept

  15. Probabilistic Design in a Sheet Metal Stamping Process under Failure Analysis

    Microsoft Academic Search

    Thaweepat Buranathiti; Jian Cao; Z. Cedric Xia; Wei Chen

    2005-01-01

    Sheet metal stamping processes have been widely implemented in many industries due to its repeatability and productivity. In general, the simulations for a sheet metal forming process involve nonlinearity, complex material behavior and tool-material interaction. Instabilities in terms of tearing and wrinkling are major concerns in many sheet metal stamping processes. In this work, a sheet metal stamping process of

  16. Transient dynamical analysis of strain signals in sheet metal stamping processes

    Microsoft Academic Search

    Xiaoli Li; A. M. Bassiuny

    2008-01-01

    On-line monitoring of stamping processes can be carried out based on various sensors, such as force, strain, acceleration, proximity, and acoustic emission sensors. The strain sensor signal is the most favourite because of its effectiveness and acquisition cost as well as it contains rich information about the stamping process. The key problem of stamping monitoring is how to extract features

  17. Feature-based metal stamping part and process design. Part I: stampability evaluation

    Microsoft Academic Search

    Dunbing Tang; Benhe Gao

    2007-01-01

    It is essential to devise a representation scheme for the metal stamping part design which allows the designer to capture and reason the design information, and ultimately, to take various considerations into account and make evaluation decisions. In our research, the feature-based approach is used to represent the metal stamping part, and feature-based metal stamping part and process design has

  18. Die Coin Experiment

    NSDL National Science Digital Library

    Kyle Siegrist

    This resource consists of a Java applet and expository text. The applet simulates the experiment of rolling a die and then tossing a coin the number of times shown on the die. The die distribution and the probability of heads can be specified. The applet illustrates a two-stage experiment.

  19. Method for hot pressing irregularly shaped refractory articles

    SciTech Connect

    Ballard, A.H.; Steinkamp, W.E.

    1982-02-09

    The present invention is directed to a method for hot pressing irregularly shaped refractory articles with these articles of varying thickness being provided with high uniform density and dimensional accuracy. Two partially pressed compacts of the refractory material are placed in a die cavity between displaceable die punches having compact-contacting surfaces of the desired article configuration. A floating, rotatable block is disposed between the compacts. The displacement of the die punches towards one another causes the block to rotate about an axis normal to the direction of movement of the die punches to uniformly distribute the pressure loading upon the compacts for maintaining substantially equal volume displacement of the powder material during the hot pressing operation.

  20. Method for hot pressing irregularly shaped refractory articles

    SciTech Connect

    Steinkamp, William E. (Clinton, TN); Ballard, Ambrose H. (Knoxville, TN)

    1982-01-01

    The present invention is directed to a method for hot pressing irregularly haped refractory articles with these articles of varying thickness being provided with high uniform density and dimensional accuracy. Two partially pressed compacts of the refractory material are placed in a die cavity between displaceable die punches having compact-contacting surfaces of the desired article configuration. A floating, rotatable block is disposed between the compacts. The displacement of the die punches towards one another causes the block to rotate about an axis normal to the direction of movement of the die punches to uniformly distribute the pressure loading upon the compacts for maintaining substantially equal volume displacement of the powder material during the hot pressing operation.

  1. 27 CFR 28.101 - Packages to be stamped.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...Foreign-Trade Zone, or Transportation to a Manufacturing Bonded Warehouse § 28.101 Packages to be stamped. Each package...removal from the bonded premises. (Approved by the Office of Management and Budget under control number 1512-0189) (Sec....

  2. 27 CFR 28.101 - Packages to be stamped.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...Foreign-Trade Zone, or Transportation to a Manufacturing Bonded Warehouse § 28.101 Packages to be stamped. Each package...removal from the bonded premises. (Approved by the Office of Management and Budget under control number 1512-0189) (Sec....

  3. 27 CFR 28.101 - Packages to be stamped.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...Foreign-Trade Zone, or Transportation to a Manufacturing Bonded Warehouse § 28.101 Packages to be stamped. Each package...removal from the bonded premises. (Approved by the Office of Management and Budget under control number 1512-0189) (Sec....

  4. 27 CFR 28.101 - Packages to be stamped.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...Foreign-Trade Zone, or Transportation to a Manufacturing Bonded Warehouse § 28.101 Packages to be stamped. Each package...removal from the bonded premises. (Approved by the Office of Management and Budget under control number 1512-0189) (Sec....

  5. 27 CFR 28.101 - Packages to be stamped.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...Foreign-Trade Zone, or Transportation to a Manufacturing Bonded Warehouse § 28.101 Packages to be stamped. Each package...removal from the bonded premises. (Approved by the Office of Management and Budget under control number 1512-0189) (Sec....

  6. Whom Shall We Put on the Postage Stamps?

    ERIC Educational Resources Information Center

    Boyle, Roger D.

    2013-01-01

    We consider the emergence of "notables" within the disciplines of the modern university, the foremost among whom may be selected to appear on postage stamps. Noting that disciplinary culture is as important as content in university education, we suggest that some knowledge of the identity of these notables, passed on by encultured tutors, should…

  7. Are People Ashamed of Paying with Food Stamps?

    Microsoft Academic Search

    Breunig; I. Dasgupta

    1999-01-01

    As is amply documented, there appears to be a large discrepancy between the marginal propensity to purchase food out of cash income and that out of food stamps. In this paper, we have examined both the formal and empirical bases of the claim that marginal welfare stigma explains this puzzling empirical regularity.

  8. On the design of time-stamped signatures

    Microsoft Academic Search

    Hung-min Sun; Bing-chang Chen; Her-tyan Yeh

    2004-01-01

    To ensure integrity and originality of digital information, digital signatures were proposed to provide both authority and non-repudiation. However, without an authenticated time-stamp we can neither trust signed documents when the signer's signature key was lost, stolen, or accidentally compromised, nor solve the cases when the signer himself repudiates the signing, claiming that he has accidentally lost his signature key.

  9. FACTORS AFFECTING PARTICIPATION IN THE FOOD STAMP PROGRAM IN TENNESSEE

    Microsoft Academic Search

    Fisseha Tegegne; Safdar Muhammad; Enefiok P. Ekanem

    2004-01-01

    The goal of the Food Stamp Program (FSP) is to serve as a safety net for low-income families by providing assistance that will enable them purchase nutritious food. Eligibility to participate in the program is based on U.S. poverty guidelines and asset ownership of recipients. Recent welfare reform resulted in a decrease of participants in all federal welfare programs including

  10. Are People Ashamed of Paying with Food Stamps?

    Microsoft Academic Search

    Breunig; I. Dasgupta

    1999-01-01

    As is amply documented, there appears to be a large discrepancy between the marginal propensity to purchace food ou of cash income and that out of food stamps. In this paper, we have examined both the formal and empirical bases of the claim that marginal welfare stigma explains this puzzling empirical regularity.

  11. Food Stamp Recipients Eat More Vegetables after Viewing Nutrition Videos.

    ERIC Educational Resources Information Center

    Joy, Amy Block; Feldman, Nancy; Fujii, Mary Lavender; Garcia, Linda; Hudes, Mark; Mitchell, Rita; Bunch, Sybille; Metz, Diane

    1999-01-01

    A study in three California counties found that food stamp recipients who viewed a videotape promoting vegetables had increased their knowledge of vegetables and greatly increased their consumption of potatoes and raw vegetables two to six weeks later. The feasibility of using videotaped nutrition instruction with low-income adults is discussed.…

  12. Friction stir spot welding of hot-stamped boron steel

    SciTech Connect

    Hovanski, Yuri; Santella, M. L.; Grant, Glenn J.

    2007-11-01

    Hot-stamped, boron steel was successfully joined via friction stir spot welding using polycrystalline cubic boron nitride tooling. The resulting microstructure, microhardness and mechanical properties are reported, including a brief look into failure mechanisms. Relationships between the unique mechanical mixing, phase transformations and failure initiation sites associated with joining martensitic steels are characterized.

  13. The Ph.D. Now Comes with Food Stamps

    ERIC Educational Resources Information Center

    Patton, Stacey

    2012-01-01

    A record number of people are depending on federally financed food assistance. Food-stamp use increased from an average monthly caseload of 17 million in 2000 to 44 million people in 2011, according to the U.S. Department of Agriculture's Web site. Last year, one in six people--almost 50 million Americans, or 15 percent of the population--received…

  14. 46. DETAIL OF UPPER STAMP BATTERIES CAMS, TAPPETS, STEMS, AND ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    46. DETAIL OF UPPER STAMP BATTERIES CAMS, TAPPETS, STEMS, AND RELATIONSHIP OF BULL WHEEL (LOWER RIGHT) LOOKING NORTH NORTHEAST. SEE CA-290-22 FOR A SIMILAR B&W NEGATIVE. - Skidoo Mine, Park Route 38 (Skidoo Road), Death Valley Junction, Inyo County, CA

  15. 45. DETAIL ELEVATION OF STAMP BATTERIES AND APRONS, LOOKING SOUTHEAST. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    45. DETAIL ELEVATION OF STAMP BATTERIES AND APRONS, LOOKING SOUTHEAST. MORTARS, BOSSES, MOST SHOES, STEMS, TAPPETS, CAMS AND BULL WHEELS ARE CLEARLY VISIBLE ON THE UPPER MORTAR BLOCKS (BELOW CENTER) UNION IRON WORKS, SAN FRANCISCO C-L. SEE CA-290-18 FOR A SIMILAR B&W NEGATIVE. - Skidoo Mine, Park Route 38 (Skidoo Road), Death Valley Junction, Inyo County, CA

  16. Laser welding of Al-Si coated hot stamping steel

    Microsoft Academic Search

    C. Kim; M. J. Kang; Y. D. Park

    2011-01-01

    Advanced high strength steel (AHSS) is being increasingly used in automotive industries for weight reduction purposes. Hot stamping steel, which is a boron alloyed steel, has a strength greater than 1500MPa after hot forming and successive quenching. Because the heating temperature is normally greater than 900°C, a thin Al-Si based coating layer is applied to the steel surface to prevent

  17. Evaluation of surface topography parameters for friction prediction in stamping

    Microsoft Academic Search

    D. Wiklund; A. Wihlborg; B.-G. Rosén

    2004-01-01

    The continued globalisation of the automotive industry, leading to increasing demands for competitiveness and escalating legislative requirements, is the main driving force of research activities of steel sheet surfaces. Recent studies on the stamping process have been carried out among others within AUTOsurf, a project funded by the European Community, and by Wihlborg and Crafoord. The purpose of this study

  18. Improving the Accuracy of Stamping Analyses Including Springback Deformations

    NASA Astrophysics Data System (ADS)

    Firat, Mehmet; Karadeniz, Erdal; Yenice, Mustafa; Kaya, Mesut

    2013-02-01

    An accurate prediction of sheet metal deformation including springback is one of the main issues in an efficient finite element (FE) simulation in automotive and stamping industries. Considering tooling design for newer class of high-strength steels, in particular, this requirement became an important aspect for springback compensation practices today. The sheet deformation modeling accounting Bauschinger effect is considered to be a key factor affecting the accuracy of FE simulations in this context. In this article, a rate-independent cyclic plasticity model is presented and implemented into LS-Dyna software for an accurate modeling of sheet metal deformation in stamping simulations. The proposed model uses Hill's orthotropic yield surface in the description of yield loci of planar and transversely anisotropic sheets. The strain-hardening behavior is calculated based on an additive backstress form of the nonlinear kinematic hardening rule. The proposed model is applied in stamping simulations of a dual-phase steel automotive part, and comparisons are presented in terms of part strain and thickness distributions calculated with isotropic plasticity and the proposed model. It is observed that both models produce similar plastic strain and thickness distributions; however, there appeared to be considerable differences in computed springback deformations. Part shapes computed with both plasticity models were evaluated with surface scanning of manufactured parts. A comparison of FE computed geometries with manufactured parts proved the improved performance of proposed model over isotropic plasticity for this particular stamping application.

  19. Fast FE analysis system for sheet metal stamping—FASTAMP

    Microsoft Academic Search

    Du Ting; Liu Yuqi; Zhang Zhibing; Li Zhigang

    2007-01-01

    FASTAMP is a fast FE analysis system for sheet metal stamping, which is based on an improved inverse approach and dynamic explicit method. The improved algorithm successfully avoids the strain localization problem existing in plastic deformation theory to lay foundation for the inverse approach. Quadrilateral membrane elements together with DKQ bend element are used in the algorithm to considering bending

  20. Rapid fabrication of nano-structured quartz stamps

    NASA Astrophysics Data System (ADS)

    Chuo, Yindar; Landrock, Clint; Omrane, Badr; Hohertz, Donna; Grayli, Sasan V.; Kavanagh, Karen; Kaminska, Bozena

    2013-02-01

    Replication of surface nano-structures from a master stamp allows large-area volume production that is otherwise cost prohibitive through conventional direct-write methods, such as electron beam lithography and focused ion beam milling. However, the creation of a master stamp containing sophisticated patterns still requires significant time on such direct-write tools. We demonstrate a method for reducing this tool time by patterning smaller nano-structures, and then enlarging them to the desired size through isotropic etching. We can create circular structures of any arrangement and size, down to the patterning limits of the direct-write tools. Subsequent metal mask deposition, lift-off, and anisotropic etching transforms the circular patterns to out-of-plane pillar structures for the final stamp. A 1 cm2 area filled with a pattern of 200 nm diameter nano-holes spaced 520 nm apart, requires only 21 h to complete using our process, compared to 75 h using conventional fabrication. We demonstrate the utility and practicality of the quartz stamps through polymer embossing and replication. Embossed polymer nano-hole arrays are coated with a Cr/Au (5/100 nm) film to create surface plasmon resonance structures. Extraordinary optical transmission spectra from the metallized arrays show the expected spectral features when compared to focused ion beam milled structures.

  1. Numerical simulation of sheet metal stamping by using ODF data

    Microsoft Academic Search

    D. Y. Li; Y. H. Peng; S. R. Zhang; S. R. Liu

    2009-01-01

    An elasto-polycrystalline plastic finite element method is developed to simulate the deformation behavior and corresponding crystallographic texture evolution of sheet metals in stamping processes. A rate-independent crystal plasticity model and a degenerated shell element are introduced into the explicit finite element formulation. A successive integration method by which the shear rates on the slip systems can be calculated without prior

  2. The Post Office Unveils the E-Stamp.

    ERIC Educational Resources Information Center

    Peppriell, Barbara

    1999-01-01

    Describes the first approved Internet postage product, which would allow users to print postage from their PCs. Discusses beta testing of the "E-Stamp" software; software companies investing in the technology; competitive programs; the small-business market; strategic alliances with envelopes, labels, and scales manufacturers; and future…

  3. Report on Nutrition and Special Groups. Part 1--Food Stamps.

    ERIC Educational Resources Information Center

    Congress of the U.S., Washington, DC. Senate Select Committee on Nutrition and Human Needs.

    The contents of this report by the staff of the Senate Select Committee on Nutrition and Human Needs--based on information gathered at the National Nutrition Policy hearings, from testimony before the Select Committee and the Senate Agriculture Committee and through staff investigation--are organized in nine chapters, as follows: (1) Food Stamp

  4. Nanoscale patterning with the double-layered soft cylindrical stamps by means of UV-nanoimprint lithography

    Microsoft Academic Search

    KeeBong Choi; GeeHong Kim; JaeJong Lee

    2009-01-01

    In nanoscale stamp fabrication, the overheads of time, cost and patterning area are soaring. Furthermore, the lifetime of a stamp is affected by the process conditions, particularly the number of times, resist parameters, pressure, and temperature. The fabrication of cylindrical stamps is also rather difficult with some nanoscale patterns. However, if a cylindrical stamp can be fabricated with a nanoscale

  5. Shrinkage of polyurethane molecular stamp fixed on epoxy resin modified glass substrate

    NASA Astrophysics Data System (ADS)

    Liu, Zhengchun; He, Quanguo; Xiao, Pengfeng; Tang, Jianxin; He, Nongyue; Lu, Zuhong

    2003-01-01

    The shrinkage of polyurethane stamps used for the in situ synthesis of DNA microarrays via molecular stamping method was studied with Micron XYZ Scope. It was found that the polyurethane stamp fixed on the epoxy resin modified glass strongly and showed minimum linear shrinkage. The linear shrinkage of the whole polyurethane stamp and that of each feature of polyurethane stamp were controlled within 0.0341% and 0.309%, respectively, which were due to the strong van der Waals forces and hydrogen bonds between polyurethane and epoxy resin. It was also confirmed by scanning electron microscope that the polyurethane stamp fixed on the epoxy resin modified glass replicated the patterns of motherboard with a high fidelity. All these underlay the synthesis of DNA microarray through molecular stamping method.

  6. Formability Predictions in Stamping and Process Parameter Optimization Based on the Inverse Approach Code Fast_Stamp

    Microsoft Academic Search

    J. L. Batoz; H. Naceur; Y. Q. Guo

    2005-01-01

    A simplified (one step) method called “inverse approach” (IA) for the numerical analysis of the stamping process has been continuously developed by the authors since the end of the eighties. In the present paper we recall the main finite element formulation aspects, for an efficient estimation of the large elastoplastic strains encountered in deep drawing operations. The capabilities of the

  7. Modelling the distribution of stamp paper thickness via finite normal mixtures: The 1872 Hidalgo stamp issue of Mexico revisited

    Microsoft Academic Search

    K. E. Basford; G. J. Mclachlan; M. G. York

    1997-01-01

    Izenman and Sommer (1988) used a non-parametric kernel density estimation technique to fit a seven-component model to the paper thickness of the 1872 Hidalgo stamp issue of Mexico. They observed an apparent conflict when fitting a normal mixture model with three components with unequal variances. This conflict is examined further by investigating the most appropriate number of components when fitting

  8. Formability Predictions in Stamping and Process Parameter Optimization Based on the Inverse Approach Code Fast_Stamp

    Microsoft Academic Search

    J. L. Batoz; H. Naceur; Y. Q. Guo

    2005-01-01

    A simplified (one step) method called ``inverse approach'' (IA) for the numerical analysis of the stamping process has been continuously developed by the authors since the end of the eighties. In the present paper we recall the main finite element formulation aspects, for an efficient estimation of the large elastoplastic strains encountered in deep drawing operations. The capabilities of the

  9. Application of a dislocation based model for Interstitial Free (IF) steels to typical stamping simulations

    NASA Astrophysics Data System (ADS)

    Carvalho Resende, T.; Balan, T.; Abed-Meraim, F.; Bouvier, S.; Sablin, S.-S.

    2010-06-01

    With a view to environmental, economic and safety concerns, car manufacturers need to design lighter and safer vehicles in ever shorter development times. In recent years, High Strength Steels (HSS) like Interstitial Free (IF) steels which have higher ratios of yield strength to elastic modulus, are increasingly used for sheet metal parts in automotive industry to meet the demands. Moreover, the application of sheet metal forming simulations has proven to be beneficial to reduce tool costs in the design stage and to optimize current processes. The Finite Element Method (FEM) is quite successful to simulate metal forming processes but accuracy largely depends on the quality of the material properties provided as input to the material model. Common phenomenological models roughly consist in the fitting of functions on experimental results and do not provide any predictive character for different metals from the same grade. Therefore, the use of accurate plasticity models based on physics would increase predictive capability, reduce parameter identification cost and allow for robust and time-effective finite element simulations. For this purpose, a 3D physically based model at large strain with dislocation density evolution approach was presented in IDDRG2009 by the authors [1]. This model allows the description of work-hardening's behavior for different loading paths (i.e. uni-axial tensile, simple shear and Bauschinger tests) taking into account several data from microstructure (i.e. grain size, texture, etc…). The originality of this model consists in the introduction of microstructure data in a classical phenomenological model in order to achieve work-hardening's predictive character for different metals from the same grade. Indeed, thanks to a microstructure parameter set for an Interstitial Free steel, it is possible to describe work-hardening behavior for different loading paths of other IF steels by only changing the mean grain size and the chemical composition. During sheet metal forming processes local material points may experience multi-axial and multi-path loadings. Before simulating actual industrial parts, automotive manufacturers use validation tools—e.g. the Cross-Die stamping test. Such typical stamping tests enable the evaluation of a complex distribution of strains. The work described is an implementation [2] of a 3D dislocation based model in ABAQUS/Explicit and its validation on a Finite Element (FE) Cross-Die model. In order to assess the performance and relevance of the 3D dislocation based model in the simulation of industrial forming applications, the results of thinning profiles predicted along several directions and the strain distribution were obtained and compared with experimental results for IF steels with grain sizes varying in the 8-22 ?m value range.

  10. The coupled thermo-mechanical-microstructural finite element modeling of hot stamping process in 22MnB5 steel

    NASA Astrophysics Data System (ADS)

    Chen, Xiangjun; Xiao, Namin; Li, Dianzhong; Li, Guangyao; Sun, Guangyong

    2013-12-01

    In this study, a coupled thermo-mechanical-microstructural finite element model based on the subroutine of commercial software ABAQUS is developed to predict the hot stamping process in 22MnB5 steel. The Johnson-Mehl-Avrami-Kolmogorov type model with Scheil' additivity rule and Koistinen-Marburger model are adopted to simulate the diffusional phase transformation and diffusionless one respectively. During the calculation of temperature and stress/strain field, the contributions of microstructure evolution, e.g. transformation latent heat, transformation strain, and transformation plasticity are taken into account, which give more insight of the material response. The model allows to evaluate the transient stress and strain distributions, the final microstructure constituent and the final distortion of the sheet part during the press quenching process. The effect of transformation plasticity on the geometry precision and the residual stress are discussed.

  11. Influence of processing temperature and die angle on the grain microstructure produced by severe deformation of an Al–7% Si alloy

    Microsoft Academic Search

    I. Gutierrez-Urrutia; M. A. Muñoz-Morris; I. Puertas; C. Luis; D. G. Morris

    2008-01-01

    Severe plastic deformation by equal-channel angular pressing has been carried out to high strains by repeated pressing using both a high-strain die and a moderate-strain die at both room temperature and at intermediate temperature. The die used appears to play no role in determining the saturation grain and dislocation microstructure after very high strains, with similar submicron grains, high dislocation

  12. Extrusion die and method

    DOEpatents

    Lipp, G. Daniel (Painted Post, NY)

    1994-04-26

    A method and die apparatus for manufacturing a honeycomb body of rhombic cell cross-section by extrusion through an extrusion die of triangular cell discharge slot configuration, the die incorporating feedholes at selected slot intersections only, such that slot segments communicating directly with the feedholes discharge web material and slot segments not so connected do not discharge web material, whereby a rhombic cell cross-section in the extruded body is provided.

  13. Über die Wirkung von Adrenochrom und Histamin auf die Blutungszeit

    Microsoft Academic Search

    G. Kuschinsky; U. Hille; H. Schimassek

    1952-01-01

    Zusammenfassung Adrenochrom (ACHR) und das Semicarbazon des Adrenochrom = Adrenoxyl verkürzen die Blutungszeit beim Kaninchen. Die Wirkung läßt sich durch Antihistaminica aufheben bzw. verhindern. Auch die Wirkung von Histamin, das in analoger Weise wie ACHR die Blutungszeit verkürzt, läßt sich durch vorherige Gabe eines Antihistaminicum verhindern. Die bereits eingetretene Wirkung von Histamin läßt sich durch Antihistaminiea nicht mehr aufheben.

  14. Use of tobacco tax stamps to prevent and reduce illicit tobacco trade - United States, 2014.

    PubMed

    Chriqui, Jamie; DeLong, Hillary; Chaloupka, Frank; Edwards, Sarah Matthes; Xu, Xin; Promoff, Gabbi

    2015-05-29

    Tobacco use is the leading cause of preventable disease and death in the United States. Increasing the unit price on tobacco products is the most effective tobacco prevention and control measure. Illicit tobacco trade (illicit trade) undermines high tobacco prices by providing tobacco users with cheaper-priced alternatives. In the United States, illicit trade primarily occurs when cigarettes are bought from states, jurisdictions, and federal reservation land with lower or no excise taxes, and sold in jurisdictions with higher taxes. Applying tax stamps to tobacco products, which provides documentation that taxes have been paid, is an important tool to combat illicit trade. Comprehensive tax stamping policy, which includes using digital, encrypted ("high-tech") stamps, applying stamps to all tobacco products, and working with tribes on stamping agreements, can further prevent and reduce illicit trade. This report describes state laws governing tax stamps on cigarettes, little cigars (cigarette-sized cigars), roll-your-own tobacco (RYOT), and tribal tobacco sales across the United States as of January 1, 2014, and assesses the extent of comprehensive tobacco tax stamping in the United States. Forty-four states (including the District of Columbia [DC]) applied traditional paper ("low-tech") tax stamps to cigarettes, whereas four authorized more effective high-tech stamps. Six states explicitly required stamps on other tobacco products (i.e., tobacco products other than cigarettes), and in approximately one third of states with tribal lands, tribes required tax stamping to address illicit purchases by nonmembers. No U.S. state had a comprehensive approach to tobacco tax stamping. Enhancing tobacco tax stamping across the country might further prevent and reduce illicit trade in the United States. PMID:26020136

  15. Monitoring enzymatic degradation of pericellular matrices through SERS stamping.

    PubMed

    Yan, Bo; Hong, Yan; Chen, Tianhong; Reinhard, Björn M

    2012-07-01

    We introduce a surface enhanced Raman spectroscopy (SERS) stamping approach for acquiring cell-surface specific vibrational spectra of individual living cells under physiological conditions. The SERS stamping approach utilizes a nanostructured metal surface on top of a lithographically defined piston that can be translated in 3-dimensions with nanometer resolution to contact living cells in solution with a pristine metal surface. We applied this approach to characterize the chemical composition of the cellular surface of living MCF7 breast cancer cells and to monitor its change upon addition of the enzyme hyaluronidase, which degrades major constituents of the pericellular matrix. Although the cell surface spectra show significant cell-to-cell fluctuations, a statistical barcode analysis of the spectra ensembles reveals systematic changes in the cell surface SERS spectra upon addition of hyaluronidase, which are consistent with a thinning of the pericellular matrix. PMID:22659641

  16. On the micro and macro perspectives of stamping engineering

    Microsoft Academic Search

    Medhat Karima

    1989-01-01

    Sheet metal engineering is a complex, iterative and interactive process. The whole function of stamping engineering is to\\u000a select the material, devise the process, the tooling, the set-up and the operational support infrastructure to produce the\\u000a final part shape, subject to part specifications, budget, and time constraints. There is little application of formal engineering\\u000a science. It follows from this practice

  17. Filtering of Randomly Sampled, Time-Stamped Measurements

    Microsoft Academic Search

    Lee Barford

    2006-01-01

    This paper concerns the filtering of measurements that are taken by networked sensors at non-uniform intervals but that are accurately time-stamped. Traditional digital filtering methods are difficult or impossible to use due to the non-uniform sampling. Two filtering methods are described. Both are based on making an assumption about signal behavior between measurements, such as the signal being constant between

  18. 18. DETAIL ELEVATION OF STAMP BATTERIES AND APRONS, LOOKING SOUTHEAST. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    18. DETAIL ELEVATION OF STAMP BATTERIES AND APRONS, LOOKING SOUTHEAST. MORTARS, BOSSES, MOST SHOES, STEMS, TAPPETS, CAMS AND BULL WHEELS ARE CLEARLY VISIBLE AND INTACT. NAMEPLATE CASTING IS CLEARLY VISIBLE ON THE UPPER MORTAR BLOCKS (BELOW CENTER) UNION IRON WORKS, SAN FRANCISCO C-L, SEE CA-290-45 (CT) FOR A SIMILAR COLOR TRANSPARENCY. - Skidoo Mine, Park Route 38 (Skidoo Road), Death Valley Junction, Inyo County, CA

  19. Optimization methods for complex sheet metal stamping computer aided engineering

    Microsoft Academic Search

    Giuseppe Ingarao; Rosa Di Lorenzo

    2010-01-01

    Nowadays, sheet metal stamping processes design is not a trivial task due to the complex issues to be taken into account (complex\\u000a shapes forming, conflicting design goals and so on). Therefore, proper design methodologies to reduce times and costs have\\u000a to be developed mostly based on computer aided procedures. In this paper, a computer aided approach is proposed with the

  20. Expert system for simulation of metal sheet stamping

    Microsoft Academic Search

    C. Álvarez-caldas; A. Quesada; A. Gauchía; J. L. San Román

    2009-01-01

    Stamping processes are frequently used in the automotive industry. In an attempt to reduce developing times and costs, conventional\\u000a design and manufacturing procedures are being changed. Finite element simulations have proved to be a good help in the design\\u000a and analysis of these processes. The main problem of these simulations is that they are quite difficult to perform and that

  1. 44. OBLIQUE DETAIL VIEW OF STAMP BATTERIES AND APRONS, LOOKING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    44. OBLIQUE DETAIL VIEW OF STAMP BATTERIES AND APRONS, LOOKING SOUTHWEST. THIS IS THE IDENTICAL PERSPECTIVE GIVEN I CA-290-43 (CT), BUT THIS IS A TIGHTER (CLOSER) SHOT. APRONS AND STAIRWAY ARE OMITTED. EACH BATTERY CONTAINS FIVE SAMPS. TWO OR THE THREE BATTERIES ARE SIDE BY SIDE IN FOREGROUND, WHILE THE THIRD BATTERY IS SEPARATE (LOWER RIGHT). - Skidoo Mine, Park Route 38 (Skidoo Road), Death Valley Junction, Inyo County, CA

  2. Liquid Supramolecular NanoStamping (LiSuNS)

    NASA Astrophysics Data System (ADS)

    Yu, Arum Amy; Stellacci, Francesco

    2008-03-01

    The development of high resolution bio-devices has generated a demand for the development of novel printing techniques able to minimize fabrication time and labor. Supramolecular NanoStamping (SuNS) is a stamping method that can copy single-stranded DNA features in a sequence specific way in only three steps: a master containing single stranded DNA features is immersed in a solution of complementary DNA (cDNA) molecules modified with a chemical group at the end (Hybridization). Another substrate is placed onto the hybridized master so that a chemical bond can form between cDNA and the secondary substrate (Contact). The two substrates are then separated by heating or mechanical force and a copy composed of cDNA is left on the secondary substrate (Dehybridization). However, like all other contact printing techniques, SuNS' efficiency highly depends on the roughness of the substrates used. Here, we present an extension of SuNS, Liquid Supramolecular NanoStamping (LiSuNS). LiSuNS eliminates the need of contact between two solid substrates by introducing a liquid prepolymer that is cured after contact. Using LiSuNS, we achieved large coverage >10cm?2. Moreover, because LiSuNS prints 3-D physical information as well as 1-D chemical information (i.e DNA sequences), it can be used to generate a complete DNA-based bio-device with 3-D physical shape (e.g. channels) and chemically modified patterns.

  3. Die Gemeinschaftsdiagnose der Wirtschaftsforschungsinstitute

    Microsoft Academic Search

    Wolfgang Nierhaus

    2002-01-01

    Zweimal in jedem Jahr – im Frühjahr und im Herbst – erstellen die sechs führenden Wirtschaftsforschungsinstitute in der Bundesrepublik Deutschland im Auftrag des Bundesministeriums für Finanzen ein Konjunkturgutachten über »die Lage der Weltwirtschaft und der deutschen Wirtschaft«. Was sich hinter der »Gemeinschaftsdiagnose« verbirgt, wird in diesem Beitrag erläutert.

  4. Shame, Death, and Dying

    Microsoft Academic Search

    Ramón Martínez de Pisón Liébanas

    2002-01-01

    This paper deals with the influence of shame on the way in which Western society, particularly North America, is coping with death and dying. From being a familiar event, death and dying have become a shameful aspect of life. Thus, this paper provides some understanding of this important transformation, and it challenges some of our present attitudes regarding death and

  5. Chronological Life Span Method Serial Dilutions and Pin Stamps Materials: Sterile 96-well plates, YPD liquid medium, YPD-G418 agar plates (~20 ml, cured on bench

    E-print Network

    Aris, John P.

    Chronological Life Span Method ­ Serial Dilutions and Pin Stamps Materials: Sterile 96-well plates reservoir, multichannel pipetter. 1. Use a 96-well plate for dilutions and pin stamping. Use 6 wells.2 X 10-4 4. Use pin stamp to `stamp' diluted samples onto YPD-G418 plates. Dip pin stamp in 100

  6. Villafranca Die Kabinete und die Revolutionen.

    E-print Network

    Prodinger, Helmut

    . »Geht fort, Weib, Oes gehört nit zu uns und Oes seid so schwarz vor Sünd' und Schand', daß die Tyroler, dös Oes ihm an'than, daß Oes a Weib seid und a Gräfin dazu!« »Ich bereue, ich bereue Alles ­ aber habt

  7. Die Soldering in Aluminium Die Casting

    SciTech Connect

    Han, Q.; Kenik, E.A.; Viswanathan, S.

    2000-03-15

    Two types of tests, dipping tests and dip-coating tests were carried out on small steel cylinders using pure aluminum and 380 alloy to investigate the mechanism of die soldering during aluminum die casting. Optical and scanning electron microscopy were used to study the morphology and composition of the phases formed during soldering. A soldering mechanism is postulated based on experimental observations. A soldering critical temperature is postulated at which iron begins to react with aluminum to form an aluminum-rich liquid phase and solid intermetallic compounds. When the temperature at the die surface is higher than this critical temperature, the aluminum-rich phase is liquid and joins the die with the casting during the subsequent solidification. The paper discusses the mechanism of soldering for the case of pure aluminum and 380 alloy casting in a steel mold, the factors that promote soldering, and the strength of the bond formed when soldering occurs. conditions, an aluminum-rich soldering layer may also form over the intermetallic layer. Although a significant amount of research has been conducted on the nature of these intermetallics, little is known about the conditions under which soldering occurs.

  8. Die Darwinsche Theorie und die Eukaryoten

    E-print Network

    Ulmschneider, Peter

    Geologe Charles Darwin 1859 in der Darwin Theorie. 6.1 Die Darwin-Theorie der Evolution Lebewesen kämpfen Darwin-Theorie zugrunde liegt, bereits in der präbiotischen Welt. Dort trägt es zur chemischen Evolution eine gewaltige Evolution statt. Diese Entwicklung des Lebens beschrieb der englische Biologe und

  9. A study on the c-axis alignment of Nd-Fe-B die-upset magnets (abstract)

    Microsoft Academic Search

    T. Kawai; S. Tanigawa; M. Tokunaga

    1991-01-01

    It is necessary to get higher c-axis alignment of Nd2Fe14B grains in Nd-Fe-B magnets for higher-energy products. During the hot working process, where melt-spun flakes were hot pressed followed by die-upsetting, hot-pressed bodies showed roughly isotropic structure while c-axis alignments were developed during die-upsetting. In this report, we studied the relationship between the reductions during upsetting and the degree of

  10. Fabrication of polyurethane molecular stamps for the synthesis of DNA microarray

    NASA Astrophysics Data System (ADS)

    Liu, Zhengchun; He, Quanguo; Xiao, Pengfeng; He, Nongyao; Lu, Zuhong; Bo, Liang

    2001-10-01

    Polyurethane based on polypropylene glycol (PPG) and Toluene diisocyanate (TDI) using 3,3'-dichloride-4,4'- methylenedianiline (MOCA) as the crosslinker is presented for the first time to fabricate molecular stamps (PU stamps) for the synthesis of DNA microarray with contact procedure. The predictability of the process is achieved by utilizing commercially available starting materials. SEM analysis of the morphology of PU stamps and master showed that PU elastometer could replicate subtly the motherboard's patterns with high fidelity. It was proved from the contact angle measurement that PU stamps surface has good affinity with acetonitrile, which guarantee the well-distribution of DNA monomers on patterned stamps. Laser confocal fluorescence microscopy images of oligonucleotide arrays confirmed polyurethane is an excellent material for molecular stamps.

  11. PRESS RELEASE / PRESS RELEASE / PRESS RELEASE / PRESS RELEASE Herv Biausser, Director of the Ecole Centrale Paris,

    E-print Network

    Paragios, Nikos

    PRESS RELEASE / PRESS RELEASE / PRESS RELEASE / PRESS RELEASE Hervé Biausser, Director of the Ecole since 2004. The governing body of Supélec has offered Hervé BIAUSSER, Director of the Ecole Centrale. ___________________________________________________________________________________ Press Contact: Ecole Centrale Paris Supélec Mr. Etienne DAGES-DESGRANGES Ms. Mariane DUBIEZ Telephone

  12. Stamping patterns of insulated gold nanowires with self-organized ultrathin polymer films.

    PubMed

    Helt, James M; Drain, Charles Michael; Bazzan, Giorgio

    2006-07-26

    A thermal contact transfer technique is presented for the fabrication of nanoscaled to microscaled patterns of polymer-insulated metal structures on ceramic surfaces using metal-coated, thermoplastic stamps. The thermally activated formation of polymer-metal-polymer (PMP) heterostructures occurs spontaneously when a metal-coated thermoplastic stamp is compressed against a ceramic substrate and subsequently heated. The presented technique exploits the dynamics of ultrathin polymer films localized at interfaces and interfacial forces to prompt local reorganization of polymer stamp materials during processing. Intercalation of polymer stamp materials into the metal-substrate interface yields a cohesive polymer layer that binds the metal layer to the substrate. Disproportionate adhesion between the bulk polymer and the polymer layer at the stamp-metal interface leaves a capping layer upon separation of the stamp from the substrate. Here we demonstrate this technique with single use, bilevel polymer stamps which afford transfer of two distinct general products. The transfer of insulated submicrometer wide wires from the raised stamp features affords patterns of trilayered PMP structures with uniform wire dimensions. Concomitant transfer from the recessed stamp features allows fabrication of multilayered PMP architectures with sub-100 nm spacing from microstructured polymer stamps. Thus, patterns with two different insulated nanowire widths are readily fabricated in a single stamping process. A variety of ceramic substrates, thermoplastic materials, and metals can be used; e.g., inexpensive gold-coated CD or DVD media can be used as stamps, where the combination of materials dictates the relative interfacial forces and the processing parameters. PMID:16848472

  13. Revue de presse hebdomadaire Semaine du 26 mars au 01 avril 2012

    E-print Network

    Rennes, Université de

    -Korrespondent Dr. Holger Schmidt) : Unternehmen investieren kräftig in ihre Auftritte auf Facebook und Twitter fonds dans des pays asiatiques qui garantissent encore le secret bancaire. (Die Presse, Vienne) #12

  14. Revue de presse hebdomadaire Semaine du 07 au 13 mars 2011

    E-print Network

    Rennes, Université de

    Revue de presse hebdomadaire Semaine du 07 au 13 mars 2011 ALLEMAND Focus n°10 ­ 05 März 2011, Bernhard) : Land um Land, Diktator um Diktator: Fasziniert, beeindruckt und verunsichert blickt die Welt

  15. Stability of a `Signal Kanban' Manufacturing Thomas I. Seidman

    E-print Network

    Seidman, Thomas I.

    by the pro­ duction control system formerly in use at the metal stamping line at Toyota Motor Manufacturing (e.g., varieties of panels for an assembly line) and the ma­ 2 #12; chine (e.g., stamping press.g., changing the die for stamping) or otherwise requires a minimum batch size. In this pa­ per, we show

  16. Über die Alkaptonurie

    Microsoft Academic Search

    Kurt Schreier; Hans Plückthun

    1952-01-01

    Es wird der normale und pathologische Stoffwechsel der beiden Aminosäuren Phenylalanin und Tyrosin erörtert, wobei auf die angeborenen Stoffwechselstörungen (Albinismus, Tyrosinosis und Oligophrenia phenylpyruvica neben der Alkaptonurie) kurz eingegangen wird.

  17. Coin Die Experiment

    NSDL National Science Digital Library

    Kyle Siegrist

    This resource consists of a Java applet and expository text. The applet is a simulation of the experiment that consists of tossing a coin and then rolling either a red die or a green die, depending on the outcome of the coin toss. The probability of heads and the distributions of the two dice can be specified. The applet illustrates a two-stage experiment.

  18. Demokrit und die Quantenmechanik

    NASA Astrophysics Data System (ADS)

    Wahsner, Renate

    Es wird gezeigt, daß der antike Atomismus ein auch für die moderne Physik fundamentales Denkprinzip begründete, ein Prinzip, das es in seiner Newtonschen Modifizierung ermöglicht, die Bewegung und das Kontinuum physikalisch zu fassen.Translated AbstractDemocrit and Quantum MechanicsIt is shown that the antique atomisms founded a thought principle which has also a fundamental meaning for modern physics, a principle which in its Newtonian version makes it possible to grasp motion and continuum physically.

  19. Die Effektivität der Hypnose

    Microsoft Academic Search

    W. Bongartz; E. Flammer; R. Schwonke

    2002-01-01

    Zusammenfassung  \\u000a Von 193 Untersuchungen zur Bestimmung der Wirksamkeit von Hypnose, die bis Ende 1998 verffentlicht wurden, konnten 43 randomisierte,\\u000a klinische Studien, in denen eine ausschlielich mit Hypnose behandelte Patientengruppe mit einer unbehandelten (bzw. mit medizinischer\\u000a Standardversorgung behandelten) Gruppe verglichen wurde, in eine Meta-Analyse integriert werden. Fr die hypnotische Behandlung\\u000a von ICD-10 kodierbaren Strungen wurde bei einem durchschnittlichen Behandlungszeitraum von 5,1

  20. Die Europäische Union, die Europäische Gemeinschaft und ihre Rechtsordnung, die Europäische Lebensmittelkontrolle

    NASA Astrophysics Data System (ADS)

    Gallhoff, Gudrun; Rimkus, Gerhard G.

    Die Europäische Union (EU) ist ein Zusammenschluss von siebenundzwanzig unabhängigen Staaten, um deren wirtschaftliche, politische und soziale Zusammenarbeit zu verstärken. Seit 1. Mai 2007 hat sie die folgenden Mitglieder: Österreich, Belgien, Bulgarien, Dänemark, Finnland, Frankreich, Deutschland, Griechenland, Irland, Italien, Luxemburg, die Niederlande, Portugal, Spanien, Schweden, das Vereinigte Königreich von Großbritannien und Nordirland, Zypern, die Tschechische Republik, Estland, Ungarn, Lettland, Litauen, Malta, Polen, Rumänien, die Slowakei und Slowenien [1]. (Hinweis: Die Republik Zypern hat juristisch Souveränität über die ganze Insel, da die Türkische Republik Nordzypern international nicht anerkannt wird.)

  1. Integrating Safety into an Engineering Contractor's System Engineering process using the guidelines of STAMP (Systems-Theoretic Accident Model and Processes)

    E-print Network

    Leveson, Nancy

    of STAMP (Systems-Theoretic Accident Model and Processes) or Evaluating Project Safety (System Engineering.............................................................................. 16 1.4.2 Analysis of STAMP Steps

  2. DualPhase HotPress Forming Alloy H. K. D. H. Bhadeshia a,b

    E-print Network

    Cambridge, University of

    ­8%. One variant of the process is warm form- ing [15], where the maximum temperature to which the steelDual­Phase Hot­Press Forming Alloy H. L. Yi a S. Ghosh a H. K. D. H. Bhadeshia a,b a­press forming steels are formed in a fully austenitic state followed by die­ quenching in order to generate

  3. 45 CFR 205.25 - Eligibility of supplemental security income beneficiaries for food stamps or surplus commodities.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...Eligibility of supplemental security income beneficiaries for food stamps or surplus commodities...Eligibility of supplemental security income beneficiaries for food stamps or surplus commodities...receiving supplemental security income benefits...

  4. An investigation of microstructural evolution during equal-channel angular pressing

    Microsoft Academic Search

    Y. Iwahashi; Z. Horita; M. Nemoto; T. G. Langdon

    1997-01-01

    Experiments were conducted to investigate the development of an ultra-fine grain size during equal-channel angular (ECA) pressing of high purity aluminum with an initial grain size of ?1.0 mm. The results show that, under ECA pressing conditions giving a strain of ?1.05 on each passage through the die, the microstructure is reasonably homogeneous after a single pressing and consists of

  5. Food Stamps and Food Insecurity: What Can Be Learned in the Presence of Nonclassical Measurement Error?

    ERIC Educational Resources Information Center

    Gundersen, Craig; Kreider, Brent

    2008-01-01

    Policymakers have been puzzled to observe that food stamp households appear more likely to be food insecure than observationally similar eligible nonparticipating households. We reexamine this issue allowing for nonclassical reporting errors in food stamp participation and food insecurity. Extending the literature on partially identified…

  6. Impact of Food Stamps on the Dietary Adequacy of Poor Children.

    ERIC Educational Resources Information Center

    Cook, John T.; Sherman, Laura P.; Brown, J. Larry

    The Food Stamp Program (FSP) is the nation's primary nutrition assistance program for poor families in the United States. This study compared the dietary adequacy of children in poor families receiving food stamps to that of children in poor families not receiving such assistance. Data used were obtained from the 1986 United States Department of…

  7. The Role of Multiple Benefits in Maintaining the Social Safety Net: The Case of Food Stamps

    Microsoft Academic Search

    Maurice MacDonald

    1985-01-01

    Panel data from the 1979 Income Survey Development Program are used to describe the adequacy of the social welfare safety net and the population it protected prior to the 1981 round of welfare cuts. The analysis centers on food stamp recipients and shows that while some food stamp recipients had incomes exceeding 130 percent of the poverty line, many others

  8. Stamping and Wrinkling of Elastic Plates Jeremy Hure, Benoi^t Roman, and Jose Bico

    E-print Network

    Bico,José

    Stamping and Wrinkling of Elastic Plates Je´re´my Hure, Benoi^t Roman, and Jose´ Bico PMMH, CNRS of an elastic plate stamped into a spherical mold. We show that the wavelength of the wrinkles decreases commonly observed in crumpled paper [12]. In these descriptions, wrinkles are assumed to totally relax

  9. Extracting hot spots of basic and complex topics from time stamped documents

    Microsoft Academic Search

    Wei Chen; Parvathi Chundi

    2009-01-01

    Identifying time periods with a burst of activity related to a topic has been an important problem in analyzing time stamped documents. In this paper, we discuss methods to compute a hot spot of a given topic from a time stamped document set. We consider basic topics that contain one or more keywords as well as complex topics that contain

  10. FROM PAPER TO PLASTIC BY 2002: RETAILERS' PERSPECTIVE ON ELECTRONIC BENEFIT TRANSFER SYSTEMS FOR FOOD STAMPS

    Microsoft Academic Search

    Ana R. Quinones; Jean D. Kinsey

    2000-01-01

    The Food Stamp Program (FSP) is working under the deadline of October 1, 2002, to coordinate a change from the current paper disbursement system of paper food stamps to an electronic transfer system of benefits, known as EBT. The Food and Nutrition Service of the U.S. Department of Agriculture has been studying the effectiveness of differing vehicles for benefit dispersal

  11. Analysis of microstructure and mechanical properties of different high strength carbon steels after hot stamping

    Microsoft Academic Search

    M. Naderi; M. Ketabchi; M. Abbasi; W. Bleck

    2011-01-01

    Usage of high strength steels may reduce the weight of automobiles and improve the crash safety and low down the gas emissions. Besides cold forming, hot stamping has gained much interest for the production of car body components. Boron alloyed steels have been the point of focus for the materials choice in hot stamping. In this paper, four high strength

  12. ENVIRONMENTALLY BENIGN LINERLESS SELF-ADHESIVE COIL STAMPS: R&D AND RECYCLING STUDIES

    E-print Network

    Abubakr, Said

    ENVIRONMENTALLY BENIGN LINERLESS SELF-ADHESIVE COIL STAMPS: R&D AND RECYCLING STUDIES Kim K been easy and quick to use, and have offered consistent adhesion. For recyclers, however, these adhesive stamps have caused concern for their paper recycling processes. In addition, there is the issue

  13. DC-STAMP, the key fusion-mediating molecule in osteoclastogenesis.

    PubMed

    Zhang, Chengcheng; Dou, C E; Xu, Jianzhong; Dong, Shiwu

    2014-10-01

    As a member of the mononuclear phagocyte system, osteoclasts (OC) absorb the bone matrix and participate in bone modeling by keeping a balance with osteoblasts (OB) and stromal cells. Mature OC derive from the fusion of mononuclear osteoclasts (mOC) and the fusion is considered as the indispensable process for the osteoclastogenesis and absorbing activity of OC. DC-STAMP (dendritic cell-specific transmembrane protein) has been validated playing a key role in the fusion of mOC. DC-STAMP is mainly expressed in OC, macrophages and dendritic cells (DC). While DC-STAMP was discovered in DC, more attentions have been paid to DC-STAMP in OC in this decade. This review will mainly focus on the function of DC-STAMP in OC. Studies on DC-STAMP in DC may also provide new sight for the study of DC-STAMP in OC. Since the function of DC-STAMP is still poorly understood and few studies have been implemented for illustration, many issues are still unknown and need to be revealed. We will also discuss these questions in this review. PMID:24420845

  14. A comparative study of stamping and hydroforming processes for an automobile fuel tank using FEM

    Microsoft Academic Search

    Beom-Soo Kang; Bo-Mi Son; Jeong Kim

    2004-01-01

    The use of sheet metal in the hydroforming process for hollow bodies is a new manufacturing technology for the automotive industry. In this paper, a comparison is made between the forming processes of sheet hydroforming and conventional stamping for production of an automobile fuel tank using a commercial explicit FEM code. A modeling methodology for correlation between stamping and hydroforming

  15. A simulation-based design parameter study in the stamping process of an automotive member

    Microsoft Academic Search

    Jung-Han Song; Hoon Huh; Se-Ho Kim

    2007-01-01

    This paper is concerned with the quantitative effect of design parameters on a stamped part of the autobody. The considered parameters in this paper are the blank holding force, the draw-bead force and the blank size, which greatly affect the metal flow during stamping. The indicators of formability selected in this paper are failures such as tearing, wrinkling and the

  16. Investigation of the thermo-mechanical properties of hot stamping steels

    Microsoft Academic Search

    M. Merklein; J. Lechler

    2006-01-01

    Within the innovative hot forming process for sheet metals, called hot stamping, it is possible to combine forming and quenching in one process step. This affords the opportunity to manufacture components with complex geometric shapes, high strength and a minimum of springback which currently find applications as crash relevant components in the automotive industry. As standard material for hot stamping

  17. A practical approach for automotive stamping moulds laser measurement and positive\\/negative nominal distance calculation

    Microsoft Academic Search

    P. M. Lerones; A. M. Gil; J. G. Garcia-Bermejo; Eduardo Zalama Casanova

    2004-01-01

    Automotive stamping moulds 3-D measurement is essential whcii there is no CAD model Trom the rnastcrpicce and either copies or re-engineering is rcqoired. To do this, touch probc or optical criangulation technologies could be used. Weighting speed and accuracy up, point laser mcasurenient is thc best affordable option 10 SMEs. A practical approach Tor 3-D stamping moulds digitising is presented.

  18. Food Stamp Participation of Hired Farmworker Families. Agriculture Economic Report No. 403.

    ERIC Educational Resources Information Center

    Smith, Leslie Whitener; Rowe, Gene

    The Food Stamp Program allows low-income households to purchase a nutritionally adequate diet through normal channels of trade. Because of the generally low income of hired farmworkers, food stamp assistance is an important addition to the economic and nutritional status of these workers and their families. This report presents a socioeconomic…

  19. Studies on the finite element simulation in sheet metal stamping processes

    Microsoft Academic Search

    Ying Huang

    2006-01-01

    The sheet metal stamping process plays an important role in modern industry. With the ever-increasing demand for shape complexity, product quality and new materials, the traditional trial and error method for setting up a sheet metal stamping process is no longer efficient. As a result, the Finite Element Modeling (FEM) method has now been widely used. From a physical point

  20. Diagnosis of Sheet Metal Stamping Processes Based on 3-D Thermal Energy Distribution

    Microsoft Academic Search

    Yiu-Ming Harry Ng; Maolin Yu; Ying Huang; Ruxu Du

    2007-01-01

    In this paper, a new approach is proposed using the 3-D thermal energy distribution of the workpiece. The new approach is based on the fact that during the stamping process, the workpiece absorbs energy to deform. This mechanical energy is converted into thermal energy. Therefore, it is possible to diagnose the stamping by analyzing the 3-D thermal energy distribution. In

  1. Sheet Metal Stamping Analysis and Process Design based on the Inverse Approach

    Microsoft Academic Search

    Jean-Louis Batoz; Hakim Naceur; Ying-Qiao Guo

    2007-01-01

    The simplified (one step) method also called ``inverse approach''(IA) for the numerical analysis of the stamping process has been continuously developed by the authors since the end of the eighties (1, 2, 3, 4). In the present paper we recall the main finite element formulation aspects of a robust IA analysis code, called FAST_STAMP, for an efficient estimation of the

  2. Assessment of Household Food Security Among Food Stamp Recipient Families in Maryland

    Microsoft Academic Search

    Cheryl A. Oberholser; Cynthia Reeves Tuttle

    Objectives. We assessed the relationship between food security status and var- ious sociodemographic characteristics among households that include children and that receive food stamps. Methods. A modified version of the US Food Security Survey Module was im- plemented by telephone survey with Maryland food stamp recipients. Results. Of the 245 households, 66% experienced food insecurity. Food secu- rity status was

  3. The Food Stamp Participation and Labor Supply of Married Couples: An Empirical Analysis of Joint Decisions

    Microsoft Academic Search

    Paul A. Hagstrom

    1996-01-01

    This paper examines the effect of the Food Stamp Program on intrafamily labor supply and program participation decisions. Married couples simultaneously choose the labor supply of the husband and wife and whether to participate in the Food Stamp Program. Using data from the Survey of Income and Program Participation, the author estimates a nested multinomial logit model. Simulations indicate smaller

  4. Stamping failure analysis of advanced high strength steel sheet based on non-uniform local deformation through thickness

    NASA Astrophysics Data System (ADS)

    Huang, Sheng; Zhao, Yixi; He, Chunfeng

    2013-12-01

    The phenomenon "Shear fracture" is often observed in the stretch-bending process of stamping over small radius with advanced high strength steels (AHSS). It occurs parallel to and near the die radius in the stretch-bending test. Since traditional Forming Limit Diagram (FLD) is unable to describe this type of failure, experimental and simulation works were constructed in this paper to investigate and predict the shear fracture. Fracture experiments were carried out through a stretch-bending test system, and failure mode was observed. There is no obviously thinning at the shear fracture surface. Further research shows that the initial crack of shear fracture occurs at the outer layer of specimen at die radius position. Finite element (FE) models were built for stretch-bending test with 3D element. The non-uniform local deformation through thickness corresponding to bending position was obtained and analyzed. Cockcroft & Latham fracture criterion is used. The outer layer of specimen at bending position reaches the critical fracture state firstly, which agrees well with experiments. Different fracture criteria are also compared and selected to determine this fracture. Results show that based on the non-uniform local deformation, the initial crack location of shear fracture at small radius can be effectively predicted by fracture criteria related to the maximum principle stress.

  5. Minimization of Latency in Cheat-Proof Real-Time Gaming by Trusting Time-Stamp Servers

    Microsoft Academic Search

    Shunsuke Mogaki; Masaru Kamada; Tatsuhiro Yonekura

    2007-01-01

    Communication latency with the lockstep protocol is minimized under the assumptions that (1) time-stamp servers are available near each player that issue serially numbered time stamps and that (2) there is no communication break down between the player and the time-stamp server. Those assumptions are relatively moderate since the time-stamping service is becoming the fundamental infrastructure of the cyberworlds. Each

  6. Direct patterning of mammalian cells onto porous tissue engineering substrates using agarose stamps.

    PubMed

    Stevens, Molly M; Mayer, Michael; Anderson, Daniel G; Weibel, Douglas B; Whitesides, George M; Langer, Robert

    2005-12-01

    This paper describes simple, inexpensive, and potentially generic methodology for generating patterns of mammalian cells on porous scaffolds for tissue engineering using replica printing. Circular patterns (diameter: 200, 700, and 1000 microm) of human osteoblasts were transferred directly from topographically patterned agarose stamps onto porous hydroxyapatite scaffolds or onto fibronectin-coated glass slides. The use of hydrogel stamps provided a "wet", biocompatible surface and maintained the viability of cells adsorbed on stamps during the patterning process. Stamps inked once with suspensions of cells allowed the repeated patterning of substrates. Direct stamping of human osteoblasts (and, potentially other mammalian cells) can be used to control the size, spacing, and geometry of patterns of cells printed on porous tissue engineering substrates. This approach may find use in controlling the spatial invasion of scaffolds, promoting the hierarchical organization of cells, and in controlling cell-cell interactions as a step in preservation of phenotypes of cells. PMID:15979701

  7. Coupled of thermal-mechanical-transformation numerical simulation on hot stamping with static explicit algorithm

    NASA Astrophysics Data System (ADS)

    Hu, P.; Shi, D. Y.; Ying, L.; Shen, G. Z.; Chang, Y.; Liu, W. Q.

    2013-05-01

    Thermal-mechanical-transformation coupled theoretical model for hot stamping and rheological behavior of high strength steel at elevated temperatures were obtained through non-isothermal and isothermal tensile tests respectively in this work. The static explicit finite element equations for hot stamping were proposed based on thermal-mechanical-transformation coupled constitutive laws and nonlinear, large deformation analysis. According to these equations, the hot stamping module of KMAS (King Mesh Analysis System) was developed for the numerical simulation of sheet metal forming at elevated temperatures. Afterwards, the hot stamping simulation of a typical B-pillar conducted by the KMAS software was compared to the experiment. The comparison consists of the following sides: temperature distribution, thickness distribution and martensite fraction. The good agreement between numerical simulation and the experiment confirms that the multi-field coupled constitutive laws and the KMAS software can predict hot stamping process accurately.

  8. [Jean Dominique Larrey and a paradoxical charity postage stamp].

    PubMed

    Moog, Ferdinand Peter

    2008-01-01

    A few years ago, the author had the lucky opportunity to acquire a charity stamp in an upright format showing the great French army surgeon Jean Dominique Larrey. This remarkable stamp, issued in 1964 for the benefit of the French Red Cross, is in itself a historical paradox which perhaps has not yet been noticed. In fact, it should have never been issued, since Larrey, to put it briefly, would have made the foundation of the Red Cross almost unnecessary: if Larrey's requirements concerning a prompt and extensive care of all wounded soldiers and persons involved in a battle had been put into practice only in Europe, there would have been no reason for an organization like the Red Cross. Henri Dunant, walking through the battlefield of Solferino in 1859, would have seen many corpses and all kinds of broken army material lying around. Seeing all that would probably have saddened him, but he would have hardly undertaken any humanitarian activity. The misery and chaos on the battlefield that moved the Swiss observer so much and prompted him to found the Red Cross would have simply not existed. Nevertheless, Jean Dominique Larrey would certainly feel greatly flattered if he could see his portrait applied to supporting the charity organization which carries out many of the ideas--once vigorously advanced by himself--up to the present day. PMID:19230372

  9. Constitutive relationships of hot stamping boron steel B1500HS

    NASA Astrophysics Data System (ADS)

    Li, Huiping; He, Lianfang; Zhao, Guoqun; Zhang, Lei

    2013-05-01

    Constitutive relationship of boron steel is one of the most necessary mathematical models in the numerical simulation of hot stamping. It describes the relationship of the flow stress with strain, strain rate and temperature. In order to simulate hot stamping and get the approximately correct simulation results, the specimens are designed and tested to build the constitutive equations of boron steel B1500HS. Isothermal uniaxial tensile tests are performed at 600-900° with the strain rate of 0.01 s-1, 0.1 s-1, 1.0 s-1 and 10 s-1 by the Gleeble thermo- mechanical simulator, and the true stress-strain curves at the relative conditions are gained. The experimental results show that, the flow stress rises with the decrease of the deformation temperature and with the increase of the strain rate. The constitutive equations depending on the strain, strain rate and temperature are attained by the regression analysis of experimental data. The comparison results show that the computational data using the constitutive relationships are well consistent with the experimental data.

  10. A superconducting solenoid and press for permanent magnet fabrication.

    SciTech Connect

    Mulcahy, T. M.; Hull, J. R.

    2002-07-16

    For the first time, a superconducting solenoid (SCM) was used to increase the remnant magnetization of sintered NdFeB permanent magnets (PMs). In particular, improved magnetic alignment of commercial-grade PM powder was achieved, as it was axial die pressed into 12.7-mm diameter cylindrical compacts in the 76.2-mm warm bore of a 9-T SCM. The press used to compact the powder is unique and was specifically designed for use with the SCM. Although the press was operated in the batch mode for this proof of concept study, its design is intended to enable automated production. In operation, a simple die and punch set made of nonmagnetic materials was filled with powder and loaded into a nonmagnetic press tube. The cantilevered press tube was inserted horizontally, on a carrier manually advanced along a track, into the SCM. The robustness of the mechanical components and the SCM, in its liquid helium dewar, were specifically designed to allow for insertion and extraction of the magnetic powder and compacts, while operating at 9 T. Compaction was achieved by pressing the punches between the closed end of the press tube and the hydraulic cylinder mounted on the opposite end. Improvements up to 10% in magnetization and 20% in energy products of the permanent magnets were obtained, as the alignment fields were increased above the 2-T maximum field of the electromagnets used in industry. Increases in magnetization of 3% are significant in the mature sintered magnet industry.

  11. The new frontier in stamping simulation - ensuring production robustness under the ``reality'' of process and raw material scatter

    Microsoft Academic Search

    Bart Carleer; Kidambi S. Kannan

    2004-01-01

    Stamping processes are routinely validated and optimized using simulation tools. Process optimization, carried out manually or automatically, establishes a single set of conditions capable of producing a good part, without any consideration of the robustness of the stamping process. This paper presents a new approach to virtual validation of stamping processes that simultaneously, and in a natural fashion, also provides

  12. 2012-2013 Student/Spouse Verification of Food Stamp or Supplemental Nutrition Assistance Program (SNAP) Benefits

    E-print Network

    2012-2013 Student/Spouse Verification of Food Stamp or Supplemental Nutrition Assistance Program received food stamps or benefits from the Supplemental Nutrition Assistance Program (SNAP) during 2010 or 2011. As part of the verification process, please provide documentation regarding receipt of food stamp

  13. A New Sheet Metal Forming System Based on Incremental Punching

    Microsoft Academic Search

    Yuanxin Luo

    2010-01-01

    Stamping is one of the most commonly used manufacturing processes. Everyday, millions of parts are formed by this process. The conventional stamping is to form a part in one or several operations with a press machine and a set\\/sets of dies. It is very efficient but is not cost effective for small batch production parts and prototypes as the dies

  14. Improvement in the press tool of tabletting machines

    Microsoft Academic Search

    Eo V. Borzunov; Yu. I. Shul'zhenko; B. I. Borodchenko; M. E. Grankin; V. M. Dekhtyarenko

    1968-01-01

    1.The design and the technique of making dies and punches the working part of which consists of hard alloys has been developed.2.Under industrial conditions, together with an improvement in the quality of the tablets with respect to their external form, an economic effect has been achieved through the introduction of a press tool resistant to wear.

  15. Dying Piñon Pine

    USGS Multimedia Gallery

    A massive forest die-off is projected to occur more frequently in the Southwest. Piñon pines, normally evergreen, have reddish-brown foliage in October 2002 (left). By May 2004 (right), the dead piñon pines have lost all their needles, exposing gray trunks and branches. The photos were...

  16. Archimedes, und die gestorten

    E-print Network

    van Straten, Duco

    Archimedes, und die gest¨orten Kreise Vortrag im Naturhistorischen Museum Mainz Prof. Dr. Duco van;Archimedes Gem¨alde von Jusepe de Ribera (1630) (Madrid) #12;Archimedes Gem¨alde von Domenico Fetti (1620-241 #12;· 263: Friedensvertrag mit Rom · Fast f¨unfzig Jahre Frie- den! · Archimedes wird Berater am Hof

  17. Die Natur der Bacteriocine

    Microsoft Academic Search

    H. Brandis

    1975-01-01

    The bacteriocins comprise a large, heterogeneous group of bactericidal substances produced by bacteria from widely differing species. The best known bacteriocins are the colieins. Some aspects of research on colicins are discussed especially their chemical nature and mode of action, and their genetic determinants. Bacteriocine stellen eine besondere Gruppe yon antibiotisch wirkenden Substanzen dar, die yon Bakterien gebildet werden, Proteinnatur

  18. Poetry and the Dying.

    ERIC Educational Resources Information Center

    Kramer, Aaron

    1992-01-01

    Demonstrates roles poetry can play as people confront the death of loved ones and their own dying. Gives examples of Heinrich Heine transforming his agony into art and, from the poetry of two college students, both in advanced stages of neurological disease, which was read aloud in class, teaching all present something about how to approach their…

  19. Dying with dignity.

    PubMed

    Abiven, M

    1991-01-01

    People facing death because of incurable illness are likely to suffer intense physical and mental distress. The provision of help and support for them can be seen as a medical discipline in its own right, demanding special training and attitudes. Each country needs to work out the best ways of looking after dying people in accordance with its culture and resources. PMID:1726501

  20. Dying with dignity.

    PubMed

    Abiven, M

    1993-03-01

    People facing death because of incurable illness are likely to suffer intense physical and mental distress. The provision of help and support for them can be seen as a medical discipline in its own right, demanding special training and attitudes. Each country needs to work out the best ways of looking after dying people in accordance with its culture and resources. PMID:7682898

  1. HERAUSFORDERUNGEN FR DIE INFORMATIONSGESELLSCHAFT?

    E-print Network

    Lutterbeck, Bernd

    . Vannevar Bush hat in seiner Vision die Innovation vorweggenommen, mit der Tim Berners Lee Jahrzehnte später in Stärken. Tim Berners-Lee hat empirisch eingelöst, was Vannevar Bush noch überwiegend als moralische nicht bekannt ist. (So auch der Ansatz von Benussi (2005)) Auch Tim Berners Lee mit seiner genialen

  2. Modeling the Mechanical Performance of Die Casting Dies

    SciTech Connect

    R. Allen Miller

    2004-02-27

    The following report covers work performed at Ohio State on modeling the mechanical performance of dies. The focus of the project was development and particularly verification of finite element techniques used to model and predict displacements and stresses in die casting dies. The work entails a major case study performed with and industrial partner on a production die and laboratory experiments performed at Ohio State.

  3. Die lebensrettende Bluttransfusion ohne die Einwilligung des heilungsfähigen Patienten

    Microsoft Academic Search

    Petra Baltz

    \\u000a Das Landgericht München I und das Oberlandesgericht München haben - soweit ersichtlich - erstmalig in Deutschland richterlich\\u000a darüber befunden, ob die Vornahme einer erfolgreichen, lebensrettenden Behandlung einen Schmerzensgeldanspruch begründen kann,\\u000a wenn der Patient die Einwilligung in die rettende ärztliche Maßnahme verweigert hat. Eine Zeugin Jehovas klagte auf Schmerzensgeld\\u000a wegen einer bei ihr durchgeführten Bluttransfusion, in die sie aus religiösen Gründen

  4. A novel time stamping technique for distributed data acquisition systems.

    PubMed

    Subramaniam, E T

    2012-12-01

    In this paper, we discuss the design and implementation of a synchronizing technique for data acquisition systems, which can effectively use the normal, standard local area network cables to provide a time stamp, with a range up to 32 days, resolution of 10 ns, and synchronization within ± 5 ns. This system may be used to synchronize data being collected by independent heterogeneous data acquisition modules, that acquire events independently. Such distributed systems are generally designed with a tree-like structure or independent self-triggered acquisition boxes. These leaf edges are connected through branches to the root node, via non-bus based inter-connecting links. The present system has been tested with a set of self-triggered digital signal processing based data acquisition engines, having a 100 MHz analog to digital converter front end. PMID:23277988

  5. To Pluto by way of a postage stamp

    NASA Technical Reports Server (NTRS)

    Staehle, Robert L.; Terrile, Richard J.; Weinstein, Stacy S.

    1994-01-01

    In this time of constrained budgets, the primary question facing planetary explorers is not 'Can we do it?' but 'Can we do it cheaply?' Taunted by words on a postage stamp, a group of mission designers at the Jet Propulsion Laboratory is struggling to find a cheap way to go to Pluto. Three primary goals were set by the science community: (1) imaging of Pluto and Charon, (2) mapping their surface composition, and (3) characterizing Pluto's atmosphere. The spacecraft will be designed around these primary goals. With the help of the Advanced Technology Insertion (ATI) process $5 million was alloted for two years to shop for lightweight components and subsystems using new technology never tried on a planetary mission. The process for this search and development is described.

  6. Universally Composable TimeStamping Schemes with Audit Ahto Buldas 1,2,3,# , Peeter Laud 1,2,## , Mart Saarepera, and Jan Willemson 1 ,4

    E-print Network

    Universally Composable Time­Stamping Schemes with Audit Ahto Buldas 1,2,3,# , Peeter Laud 1 Tallinn, Estonia. 4 Playtech Estonia. Abstract. We present a universally composable time­stamping scheme composable auditable time­stamping scheme, almost all time stamp requests must be communicated to the auditor

  7. In proceedings of PKC2000, Vol. 1751 of Lecture Notes in Computer Science, Springer-Verlag, 2000. pp. 293-305. Optimally Efficient Accountable Time-Stamping

    E-print Network

    Schoenmakers, Berry

    . pp. 293-305. Optimally Efficient Accountable Time-Stamping Ahto Buldas 1 , Helger Lipmaa 1 MB Eindhoven, The Netherlands berry@win.tue.nl Abstract. Efficient secure time-stamping schemes employ a 2-level ap- proach in which the time-stamping service operates in rounds. We say that a time-stamping

  8. Dynamic modeling and experiment of a new type of parallel servo press considering gravity counterbalance

    NASA Astrophysics Data System (ADS)

    He, Jun; Gao, Feng; Bai, Yongjun; Wu, Shengfu

    2013-11-01

    The large capacity servo press is traditionally realized by means of redundant actuation, however there exist the over-constraint problem and interference among actuators, which increases the control difficulty and the product cost. A new type of press mechanism with parallel topology is presented to develop the mechanical servo press with high stamping capacity. The dynamic model considering gravity counterbalance is proposed based on the virtual work principle, and then the effect of counterbalance cylinder on the dynamic performance of the servo press is studied. It is found that the motor torque required to operate the press is a lot less than the others when the ratio of the counterbalance force to the gravity of ram is in the vicinity of 1.0. The stamping force of the real press prototype can reach up to 25 MN on the position of 13 mm away from the bottom dead center. The typical deep-drawing process with 1 200 mm stroke at 8 strokes per minute is proposed by means of five order polynomial. On this process condition, the driving torques are calculated based on the above dynamic model and the torque measuring test is also carried out on the prototype. It is shown that the curve trend of calculation torque is consistent to the measured result and that the average error is less than 15%. The parallel mechanism is introduced into the development of large capacity servo press to avoid the over-constraint and interference of traditional redundant actuation, and its dynamic characteristics with gravity counterbalance are presented.

  9. Conical tungsten stamps for the replication of pore arrays in anodic aluminium oxide films

    NASA Astrophysics Data System (ADS)

    LeClere, D. J.; Thompson, G. E.; Derby, B.

    2009-06-01

    A tungsten master stamp has been generated by applying a novel procedure that includes two-step anodizing, followed by sequential anodizing and pore widening to develop nominally funnelled pores. These conical-shaped pores were filled with tungsten by sputter coating to manufacture a master stamp. Under a pressure of 65 MPa, the master stamp successfully embossed the surface of annealed and electropolished aluminium. The embossed surface was then used to control the position of pores created by anodizing under the conditions used to produce the original pore array.

  10. Conical tungsten stamps for the replication of pore arrays in anodic aluminium oxide films.

    PubMed

    LeClere, D J; Thompson, G E; Derby, B

    2009-06-17

    A tungsten master stamp has been generated by applying a novel procedure that includes two-step anodizing, followed by sequential anodizing and pore widening to develop nominally funnelled pores. These conical-shaped pores were filled with tungsten by sputter coating to manufacture a master stamp. Under a pressure of 65 MPa, the master stamp successfully embossed the surface of annealed and electropolished aluminium. The embossed surface was then used to control the position of pores created by anodizing under the conditions used to produce the original pore array. PMID:19468168

  11. Die Systemarchitektur von Windows 7

    Microsoft Academic Search

    Martin Grotegut

    \\u000a Windows 7 ist die siebte und damit gegenwärtig neueste Version der Windows- Betriebssystem-Familie. Über die „7” im Namen\\u000a gab es viele Spekulationen: Ist die „7” eine Anlehnung an den Nachnamen von Bill Gates als einem der drei Microsoft-Gründern?\\u000a Schließlich ist das „G” der siebte Buchstabe im Alphabet.

  12. Die pharmakologische Wirkung des Ephedrins

    Microsoft Academic Search

    H. Kreitmair

    1927-01-01

    Zusammenfassung 1.Die pharmakologische Wirkung des Ephedrins wurde zu analysieren versucht durch Studium der Beeinflussung des Blutdrucks, der Herzaktion und der Gefäße, des Effekts am Atemzentrum und an den Bronchien, der Wirkung auf die Pupillenweite, auf den Darm und den Uterus, auf die Sekretion verschiedener Drüsen und den Blutzuckerspiegel.2.Es wurden folgende Wirkungen gefunden: Der Blutdruck wird erhöht durch kleine Dosen, erniedrigt

  13. Der Islam und die Geschlechterfrage

    E-print Network

    Steinhoff, Heinz-Jürgen

    Der Islam und die Geschlechterfrage ­ theologische, gesellschaftliche, historische und praktische ausloten. Dazu gehört die Analyse der Wurzeln des Diskurses um ,,die Frau im Islam" aus einer and the Transmission of Religious Knowledge in Islam Prof. Dr. Asma Sayeed, University of California 10. Dezember

  14. Die Geschichte des Wargaming

    Microsoft Academic Search

    Daniel F. Oriesek; Jan Oliver Schwarz

    Wargaming wurde schon vor langer Zeit entwickelt und eingesetzt, und es ist vermutlich so alt wie der Krieg selbst (Perla\\u000a 1990). Seinen Ursprung hat es wohl im militärischen Bedürfnis, Befehlshaber der Armee und ihre Offiziere besser auf unvorhergesehene\\u000a Entwicklungen auf dem Schlachtfeld vorzubereiten. Wer besser versteht, welche möglichen feindlichen Reaktionen die eigene\\u000a Handlungsweise hervorrufen kann und wie diesen am besten

  15. Einführung in die Laborpraxis

    NASA Astrophysics Data System (ADS)

    Wir leben in einer von Naturwissenschaft und Technik bestimmten Welt. Gerade in Deutschland, das arm an natürlichem Reichtum wie Bodenschätzen ist, hängt der Wohlstand von technischen Errungenschaften und wissenschaftlichen Erkenntnissen ab. Diese gewinnt man hauptsächlich in Labors. Hier wurden und werden die Ideen zahlreicher Wissenschaftler, von Chemikern, Physikern, Genetikern, Medizinern, Biologen, Umwelttechnikern und Ingenieuren umgesetzt, erarbeitet, in ihrer Richtigkeit bestätigt oder verworfen und weiter entwickelt.

  16. Einführung in die Hörgerätetechnik

    NASA Astrophysics Data System (ADS)

    Karamuk, Erdal; Korl, Sascha

    Sechzehn Prozent aller erwachsenen Europäer leiden an so starken Hörminderungen, dass sie ihren Alltag beeinträchtigen. In Europa haben rund 71 Millionen Erwachsene im Alter von 18 bis 80 Jahren eine Hörminderung von mehr als 25 dB, ein Wert, der von der Weltgesundheitsorganisation, WHO, als hörgeschädigt definiert wird. Allein in der EU gibt es über 55 Millionen hörgeschädigte Menschen, davon über 10 Millionen in Deutschland. Die sozialen und volkswirtschaftlichen Kosten der Schwerhörigkeit sind beträchtlich [1].

  17. The Evolution of Sheet Metal Forming Simulation in Stamping Industry

    Microsoft Academic Search

    Arthur Tang; Wing Lee; Jeanne He

    The field of sheet metal forming has experienced numerous innovative changes over the past few decades, such as new forming techniques and application of computer technologies. New forming techniques include application of tailor-welded blank, high strength steel forming, hydroforming, press automation and so on. One of the computer technologies is the implementation of Computer Aided Engineering (CAE), such as sheet

  18. Die drool and polymer degradation

    NASA Astrophysics Data System (ADS)

    Hoy, Geoffrey Stephen; Giacomin, Alan Jeffrey; Gilbert, Peter Hunter

    2015-04-01

    Die drool is an operational problem associated with polymer extrusion. Extrudate collects outside of the die, necessitating periodic disruptions for cleaning. There exists some debate as to the mechanism that produces die drool: stress induced fractionation or thermal degradation. This paper examines the latter. In cohesive failure, a slip discontinuity develops in the velocity profile, where heat is generated by friction. This slip heating can contribute to resin degradation, resulting in lower molecular weight fragments in the die drool. This paper examines the kinetics of this degradation, its influence on die drool rates, and on the resulting polymer concentration profiles in the drool layer and in the bulk.

  19. Einführung in die Technische Chemie

    NASA Astrophysics Data System (ADS)

    Behr, Arno; Agar, David W.; Jörissen, Jakob

    Die "Technische Chemie" ist ein Lehrfach an Universitäten und Hochschulen. Nach dem die Studierenden der Chemie in den ersten Semestern ihres Studiums ausrei chen de theoretische Kenntnisse in Allgemeiner, Anorganischer, Organischer und Physikalischer Chemie erlangt haben, soll die Technische Chemie einen Blick auf die praktische Anwendung dieser Naturwissenschaft in unserer Wirtschaft lenken. Es gibt keine "biologische Industrie", "physikalische Industrie" oder "mathematische Industrie", wohl aber seit über 150 Jahren eine "chemische Industrie", die in dieser lan gen Zeit zahlreiche chemische Prozesse entwickelt und dazu vielfältige Methoden erarbeitet hat. Das Lehrfach Technische Chemie gibt einen Überblick über diese Pro zesse und Methoden und erleichtert dadurch den Schritt von der Universität zur be ruflichen Praxis.

  20. 27 CFR 479.171 - Redemption of or allowance for stamps.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Redemption of or Allowance for Stamps or Refunds § 479.171...

  1. 27 CFR 479.171 - Redemption of or allowance for stamps.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Redemption of or Allowance for Stamps or Refunds § 479.171...

  2. 27 CFR 479.171 - Redemption of or allowance for stamps.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Redemption of or Allowance for Stamps or Refunds § 479.171...

  3. 27 CFR 479.171 - Redemption of or allowance for stamps.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Redemption of or Allowance for Stamps or Refunds § 479.171...

  4. 27 CFR 479.36 - The special tax stamp, receipt for special (occupational) taxes.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Special (Occupational) Taxes § 479.36 The special tax stamp,...

  5. 27 CFR 479.36 - The special tax stamp, receipt for special (occupational) taxes.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Special (Occupational) Taxes § 479.36 The special tax stamp,...

  6. 27 CFR 479.36 - The special tax stamp, receipt for special (occupational) taxes.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Special (Occupational) Taxes § 479.36 The special tax stamp,...

  7. 27 CFR 479.36 - The special tax stamp, receipt for special (occupational) taxes.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Special (Occupational) Taxes § 479.36 The special tax stamp,...

  8. 27 CFR 479.171 - Redemption of or allowance for stamps.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Redemption of or Allowance for Stamps or Refunds § 479.171...

  9. 27 CFR 479.36 - The special tax stamp, receipt for special (occupational) taxes.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ...Firearms BUREAU OF ALCOHOL, TOBACCO, FIREARMS, AND EXPLOSIVES, DEPARTMENT OF JUSTICE FIREARMS AND AMMUNITION MACHINE GUNS, DESTRUCTIVE DEVICES, AND CERTAIN OTHER FIREARMS Special (Occupational) Taxes § 479.36 The special tax stamp,...

  10. Fabrication of fluorine-doped diamond-like carbon stamps for UV nanoimprint lithography.

    PubMed

    Altun, A O; Jeong, J H; Rha, J J; Choi, D G; Kim, K D; Lee, E S

    2006-09-28

    Two fluorine-doped diamond-like carbon (F-DLC) stamps with sub-100 nm line patterns were fabricated using a direct etching method. These were applied successfully to ultraviolet (UV) nanoimprint lithography without requiring an anti-adhesion layer coating. Tests were performed to determine the optimum fluorine concentration for the F-DLC stamps. The ideal stamp material consisted of 25 at.% F-DLC with a contact angle of 85°, UV transmittance of 16.4-26.8%, and hardness of 4.5 GPa. The O(2) plasma etch rate of the DLC was increased considerably by the fluorine doping, making it comparable to the etch rate of polymethyl methacrylate (PMMA). Thus, only PMMA was used as the etch mask in the fabrication of the stamps. PMID:21727593

  11. Thin-film patterns directly fabricated using a transfer stamping technique

    NASA Astrophysics Data System (ADS)

    Chan, Bin-Da; Hsieh, Kuo-Huang; Yang, Sen-Yeu

    2009-02-01

    This paper reports a technique to fabricate thin-film patterns on polymeric substrates. Wet and dry transfer stamping processes are developed for different ink materials. In addition to photoresist, organic conductive polymers are also used as the ink, to be transferred onto a PMMA substrate using the proposed transfer stamping process. The parameters of the transfer stamping process, including pressure, temperature and ink properties, are studied in this paper. Dual-layer patterns have been successfully fabricated, demonstrating the capacity of transfer stamping to fabricate multi-layer components, such as organic thin-film transistor (OTFT). The patterns are also transferred on the metal substrate, which has the potential to be used as an etch mask in the photolithography process, indicating the application of fabricating metal mold with microstructures using a simplified process.

  12. PATIENT NAME: PATIENT DATE OF BIRTH: PATIENT MEDICAL RECORD # (IF ADDRESSOGRAPH STAMP IS NOT USED)

    E-print Network

    Mootha, Vamsi K.

    PATIENT NAME: PATIENT DATE OF BIRTH: PATIENT MEDICAL RECORD # (IF ADDRESSOGRAPH STAMP IS NOT USED(s): Please List Confidential Details of: Psychotherapy (from a Psychiatrist, Psychologist, or Mental Health

  13. Liquid-Metal-Induced Embrittlement of Zn-Coated Hot Stamping Steel

    NASA Astrophysics Data System (ADS)

    Lee, Chang Wook; Fan, Dong Wei; Sohn, Il Ryoung; Lee, Seok-Jae; De Cooman, Bruno C.

    2012-12-01

    Liquid-metal-induced embrittlement (LMIE) of galvanized hot stamping steel occurs due to the simultaneous application of stress and the presence of a liquid Zn surface layer during the hot stamping process. The mechanism specific to the liquid metal induced embrittlement occurring during hot stamping was investigated in detail. It was found that when a tensile stress was applied, liquid Zn could penetrate along grain boundaries in the steel matrix at temperatures above the Liquid + ?-Fe (Zn) ? ?1 peritectic transformation temperature of 1055 K (782 °C). The results show that an increase of the annealing time prior to hot stamping is an effective way to prevent LMIE by the elimination of the liquid phase.

  14. 42 CFR 71.3 - Designation of yellow fever vaccination centers; Validation stamps.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ...2012-10-01 false Designation of yellow fever vaccination centers; Validation...Provisions § 71.3 Designation of yellow fever vaccination centers; Validation stamps. (a) Designation of yellow fever vaccination centers....

  15. 42 CFR 71.3 - Designation of yellow fever vaccination centers; Validation stamps.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ...2014-10-01 false Designation of yellow fever vaccination centers; Validation...Provisions § 71.3 Designation of yellow fever vaccination centers; Validation stamps. (a) Designation of yellow fever vaccination centers....

  16. 42 CFR 71.3 - Designation of yellow fever vaccination centers; Validation stamps.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ...2013-10-01 false Designation of yellow fever vaccination centers; Validation...Provisions § 71.3 Designation of yellow fever vaccination centers; Validation stamps. (a) Designation of yellow fever vaccination centers....

  17. 42 CFR 71.3 - Designation of yellow fever vaccination centers; Validation stamps.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ...2011-10-01 false Designation of yellow fever vaccination centers; Validation...Provisions § 71.3 Designation of yellow fever vaccination centers; Validation stamps. (a) Designation of yellow fever vaccination centers....

  18. 42 CFR 71.3 - Designation of yellow fever vaccination centers; Validation stamps.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ...2010-10-01 false Designation of yellow fever vaccination centers; Validation...Provisions § 71.3 Designation of yellow fever vaccination centers; Validation stamps. (a) Designation of yellow fever vaccination centers....

  19. Precision control of cylindrical stamp contact in a continuous roll-to-roll microcontact printing machine

    E-print Network

    Libert, Adam M. (Adam Marcus)

    2014-01-01

    Microcontact printing is a form of soft lithography that uses a molded elastomeric stamp to print patterns with micron and sub-micron scale features. This is an effective low-cost technique for replicating master patterns ...

  20. Press Release Writing

    NSDL National Science Digital Library

    As expected, Press Release Writing, from Accurate Online Solutions, offers a helpful tutorial on the art of press release writing. The advice is broken into several easily digestible sections, covering the main themes of the advertising vs. public relations debate, essentials of writing press releases, templates, formats, and samples. The site also offers comprehensive distribution lists for all media formats including electronic media, magazines, newspapers, wire services, and television stations. Interested users will want to subscribe to the free Press Release Writing enewsletter.

  1. The Global University Press

    ERIC Educational Resources Information Center

    Dougherty, Peter J.

    2012-01-01

    The modern world's understanding of American university press has long been shaped by university-press books. American university-press books are good international advertisements for the universities whose logos grace their spines. The growth of transnational scholarship and the expansion of digital communications networks are converging in ways…

  2. A novel solution-stamping process for preparation of a highly conductive aluminum thin film.

    PubMed

    Lee, Hye Moon; Choi, Si-Young; Kim, Kyung Tae; Yun, Jung-Yeul; Jung, Dae Soo; Park, Seung Bin; Park, Jongwook

    2011-12-01

    A novel solution-stamping process for the preparation of a highly conductive aluminum thin film on both rigid and flexible substrates is proposed. The superior electrical properties of Al thin films fabricated by the solution-stamping process compared to silver and gold films fabricated from colloidal nanoparticles are experimentally demonstrated, and their applications in electronic circuits on rigid and flexible substrates and to organic light-emitting diodes (OLEDs) are investigated. PMID:22052580

  3. Nanotransfer Printing Using Plasma Etched Silicon Stamps and Mediated by In-Situ Deposited Fluoropolyme

    SciTech Connect

    Bhandari, Deepak [ORNL; Kravchenko, Ivan I [ORNL; Lavrik, Nickolay V [ORNL; Sepaniak, Michael J [ORNL

    2011-01-01

    This communication describes a simple method that uses a thin film of octafluorocyclobutane (OFCB) polymer for efficient nanoscale transfer printing (nTP). Plasma polymerization of OFCB produces a Teflon-like fluoropolymer which strongly adheres and conformally covers 3-D inorganic stamp. The inherently low surface energy of in-situ deposited OFCB polymer on nanoscale silicon features is demonstrated as a unique nanocomposite stamp to fabricate various test structures with improved nTP feature resolution down to sub 100 nm.

  4. Regulation of Human Osteoclast Development by Dendritic Cell-Specific Transmembrane Protein (DC-STAMP)

    PubMed Central

    Chiu, Ya-Hui; Mensah, Kofi A.; Schwarz, Edward M.; Ju, Yawen; Takahata, Masahiko; Feng, Changyong; McMahon, Loralee A.; Hicks, David G.; Panepento, Ben; Keng, Peter C.; Ritchlin, Christopher T.

    2011-01-01

    Osteoclasts (OC) are bone-resorbing, multinucleated cells that are generated via fusion of OC precursors (OCP). The frequency of OCP is elevated in patients with erosive inflammatory arthritis and metabolic bone diseases. Although many cytokines and cell surface receptors are known to participate in osteoclastogenesis, the molecular mechanisms underlying the regulation of this cellular transformation are poorly understood. Herein, we focused our studies on the dendritic cell-specific transmembrane protein (DC-STAMP), a seven-pass-transmembrane receptor-like protein known to be essential for cell-to-cell fusion during osteoclastogenesis. We identified an immunoreceptor tyrosine-based inhibitory motif (ITIM) in the cytoplasmic tail of DC-STAMP, and developed an anti-DC-STAMP monoclonal antibody 1A2 that detected DC-STAMP expression on human tumor giant cells, blocked OC formation in vitro, and distinguished four patterns of human PBMC with a positive correlation to OC potential. In freshly isolated monocytes, DC-STAMPhigh cells produced a higher number of OC in culture than DC-STAMPlow cells and the surface expression of DC-STAMP gradually declined during osteoclastogenesis. Importantly, we showed that DC-STAMP is phosphorylated on its tyrosine residues and physically interacts with SHP-1 and CD16, an SH2-domain-containing tyrosine phosphatase and an ITAM-associated protein, respectively. Taken together, these data show that DC-STAMP is a potential OCP biomarker in inflammatory arthritis. Moreover, in addition to its effect on cell fusion, DC-STAMP dynamically regulates cell signaling during osteoclastogenesis. PMID:21987375

  5. Die Gestalt analytischer, Liouvillescher Flächen im Großen

    Microsoft Academic Search

    Helmut Viesel

    1966-01-01

    bringen l~iBt. Bekannte Liouvillesche Fliichen sind die Rotationsfliichen und die Fl~ichen zweiten Grades. Die Besonderheit dieses Bogenelementes ist, daB man die Differentialgleichung der geodiitischen Linien integrieren kann. JACOBI [5] gelang dies beim Ellipsoid, indem er die Schnittlinien mit den konfokalen Hyperboloiden als Parameterlinien benutzte. LIOUVILLE [6] verallgemeinerte dieses Ergebnis auf die Fliichenstiicke mit obigem Bogenelement. Durch die Kenntnis der geodiitischen

  6. A Fully Automated and Robust Method to Incorporate Stamping Data in Crash, NVH and Durability Analysis

    NASA Astrophysics Data System (ADS)

    Palaniswamy, Hariharasudhan; Kanthadai, Narayan; Roy, Subir; Beauchesne, Erwan

    2011-08-01

    Crash, NVH (Noise, Vibration, Harshness), and durability analysis are commonly deployed in structural CAE analysis for mechanical design of components especially in the automotive industry. Components manufactured by stamping constitute a major portion of the automotive structure. In CAE analysis they are modeled at a nominal state with uniform thickness and no residual stresses and strains. However, in reality the stamped components have non-uniformly distributed thickness and residual stresses and strains resulting from stamping. It is essential to consider the stamping information in CAE analysis to accurately model the behavior of the sheet metal structures under different loading conditions. Especially with the current emphasis on weight reduction by replacing conventional steels with aluminum and advanced high strength steels it is imperative to avoid over design. Considering this growing need in industry, a highly automated and robust method has been integrated within Altair Hyperworks® to initialize sheet metal components in CAE models with stamping data. This paper demonstrates this new feature and the influence of stamping data for a full car frontal crash analysis.

  7. Carbon nanotube substrates and catalyzed hot stamp for polishing and patterning the substrates

    DOEpatents

    Wang, Yuhuang (Evanston, IL); Hauge, Robert H. (Houston, TX); Schmidt, Howard K. (Houston, TX); Kim, Myung Jong (Houston, TX); Kittrell, W. Carter (Houston, TX)

    2009-09-08

    The present invention is generally directed to catalyzed hot stamp methods for polishing and/or patterning carbon nanotube-containing substrates. In some embodiments, the substrate, as a carbon nanotube fiber end, is brought into contact with a hot stamp (typically at 200-800.degree. C.), and is kept in contact with the hot stamp until the morphology/patterns on the hot stamp have been transferred to the substrate. In some embodiments, the hot stamp is made of material comprising one or more transition metals (Fe, Ni, Co, Pt, Ag, Au, etc.), which can catalyze the etching reaction of carbon with H.sub.2, CO.sub.2, H.sub.2O, and/or O.sub.2. Such methods can (1) polish the carbon nanotube-containing substrate with a microscopically smooth finish, and/or (2) transfer pre-defined patterns from the hot stamp to the substrate. Such polished or patterned carbon nanotube substrates can find application as carbon nanotube electrodes, field emitters, and field emitter arrays for displays and electron sources.

  8. Die Bedeutung von Business Wargaming für die strategische Planung

    Microsoft Academic Search

    Daniel F. Oriesek; Jan Oliver Schwarz

    Dieses Zitat nach dem berühmten Zukunfts- und Trendforscher Alvin Toffler (2000) greift einige interessante Aspekte der strategischen\\u000a Planung in der heutigen Zeit auf. Die erste Hälfte des Zitats gibt die verbreitete Annahme wieder, dass strategische Planung\\u000a ein langer und unflexibler Prozess ist, der einem sich schnell ändernden Umfeld nicht gerecht werden kann. Im zweiten Teil\\u000a legt Toffler dar, dass die

  9. Insulation from basaltic stamp sand. Final technical report

    SciTech Connect

    Williams, F. D.

    1981-04-01

    A Midwest Appropriate Technology Grant was awarded to determine the technical and economic feasibility of producing mineral-fiber insulation directly from extensive deposits of basaltic sand produced during former mining and milling operations in the Keweenaw Peninsula region of Michigan's Upper Peninsula. The amounts of local basaltic sands available and representative chemical compositions were determined. The variation of viscosity with temperature and chemical composition was estimated. Samples were melted and either pulled or blown into fiber. In all cases fiber could be made with a reasonable tensile strength to ensure usefulness. It was concluded that it was technically feasible to produce fibers from basaltic stamp sands of the Upper Peninsula of Michigan. A technical feasibility study using published data, a cost and design analysis of a basalt fiber production plant, a market survey of fiber needs, and an economic analysis for investing in a basalt fiber venture was undertaken. These studies concluded that the local production of basaltic insulation was both feasible and economically reasonable. It was suggested that the plant be located in a region of greater population density with lower utility costs. A representative one-third of these studies is included as appendices A, B, C, and D.

  10. TiN coating\\/glass substrate system fabricated for hot-embossing stamp at multi-scale

    Microsoft Academic Search

    Hai R. Wang; Zhi T. Zhou; Zhuang D. Jiang; Guo L. Sun; Xian N. Gao; Chuan Yang

    2008-01-01

    For the hot-embossing lithography, imprinting stamp with long-life span, good anti-wear property and precise geometrical shape, is much expected for pushing forward the technology to industrial application. By analyzing disadvantages of current Si and SiO2 imprinting stamps, this paper presents TiN coating\\/glass substrate system as the stamp material, in which the glass plates serves as substrate and the hard TiN

  11. Zinc coated sheet steel for press hardening

    NASA Astrophysics Data System (ADS)

    Ghanbari, Zahra N.

    Galvanized steels are of interest to enhance corrosion resistance of press-hardened steels, but concerns related to liquid metal embrittlement have been raised. The objective of this study was to assess the soak time and temperature conditions relevant to the hot-stamping process during which Zn penetration did or did not occur in galvanized 22MnB5 press-hardening steel. A GleebleRTM 3500 was used to heat treat samples using hold times and temperatures similar to those used in industrial hot-stamping. Deformation at both elevated temperature and room temperature were conducted to assess the coating and substrate behavior related to forming (at high temperature) and service (at room temperature). The extent of alloying between the coating and substrate was assessed on undeformed samples heat treated under similar conditions to the deformed samples. The coating transitioned from an ? + Gamma1 composition to an ? (bcc Fe-Zn) phase with increased soak time. This transition likely corresponded to a decrease in availability of Zn-rich liquid in the coating during elevated temperature deformation. Penetration of Zn into the substrate sheet in the undeformed condition was not observed for any of the processing conditions examined. The number and depth of cracks in the coating and substrate steel was also measured in the hot-ductility samples. The number of cracks appeared to increase, while the depth of cracks appeared to decrease, with increasing soak time and increasing soak temperature. The crack depth appeared to be minimized in the sample soaked at the highest soak temperature (900 °C) for intermediate and extended soak times (300 s or 600 s). Zn penetration into the substrate steel was observed in the hot-ductility samples soaked at each hold temperature for the shortest soak time (10 s) before being deformed at elevated temperature. Reduction of area and elongation measurements showed that the coated sample soaked at the highest temperature and longest soak time maintained the highest ductility when compared to the uncoated sample processed under the sample conditions. Fractography of the hot-ductility samples showed features associated with increased ductility with increased soak time for all soak temperatures. Heat treatments (without elevated temperature deformation) and subsequent room temperature deformation were conducted to investigate the "in-service" behavior of 22MnB5. The uncoated and coated specimens deformed at room temperature showed similar ultimate tensile strength and ductility values. The only notable differences in the room temperature mechanical behavior of uncoated and coated samples processed under the same conditions were a result of differences in the substrate microstructure. All samples appeared to have ductile fracture features; features characteristic of liquid metal embrittlement were not observed.

  12. Spectral database for postage stamps by means of FT-IR spectroscopy.

    PubMed

    Imperio, Eleonora; Giancane, Gabriele; Valli, Ludovico

    2013-08-01

    A Fourier transform infrared (FT-IR) spectroscopy study on the entire Italian postage stamps production is presented in this work. Crossing 150 years of issues from the unification of Italy until today, a time line of the major components constituting the stamps has been defined, based on the wide spectral database built on the basis of the numerous analyzed exemplars. Even though it is easy to find reports about stamps' issues history, information arising from these investigations contributes to throw light upon the substances incorporated in the stamps, which could be described as hybrid or composite materials (a sort of undisclosed or hidden story). As a result of the whole spectra acquired in attenuated total reflectance (ATR) mode, changes in paper composition showed the transition from the protein sizing glue to starch sizing; also the employment of kaolin varied through time. First it was used as the extender in the pigment-medium mixture, and finally it constituted the coating on the stamp surface. Also the chemical composition of the adhesive gum on the rear side of stamps has been subjected to modifications, as well as the front side. The earliest back glue was a protein-based adhesive; then it was replaced by gum arabic first and by poly(vinyl acetate) (PVAC) later. FT-IR spectroscopy, supported by the detailed database developed, has been applied, for the first time, in the very useful detection of two counterfeit samples: a fake of the famous Gronchi Rosa, issued in 1961, and a regummed 2 cent red stamp, issued in 1865. The information held in the whole spectral data has been selected and employed in the principal component analysis (PCA) statistical analysis. PMID:23829324

  13. K2CO3 catalysis on the reactivity of top charged coke and stamp charged coke

    NASA Astrophysics Data System (ADS)

    Pang, Qing-hai; Zhang, Jian-liang; Qi, Cheng-lin; Ma, Chao; Kong, De-wen; Mao, Rui

    2013-01-01

    The catalysis of K2CO3 on the reactivity of top charged coke and stamp charged coke from Pansteel in China was studied. The coke reaction index of the stamp charged coke was 1%-2% higher than that of the top charged coke. Under the catalysis of K2CO3, the coke reaction index of both cokes approximately increased by 4%, 6%, 10% and 6% at 900, 1000, 1100 and 1200°C, respectively. The reactivity of the K-enriched stamp charged coke was 1%-2% higher than that of the K-enriched top charged coke below 1100°C. However, only negligible differences were found in the temperature zone between 1100 and 1200°C. Scanning electron microscopy images illustrated that pores in the top charged coke were smaller and equally distributed, while relatively more big pores exist non-homogenously in stamp charged coke. Due to the different processes in production, the stamp charged coke was more porous and most of the pores tended to be applanate. Cracks were observed in the microstructure of the stamp charged coke during the carbon solution reaction, implying the inferior quality of the stamp charged coke to the top charged coke at high temperature. Diffusion of K during the carbon solution reaction was studied by the energy dispersive spectrometry. It is found that K gradually spreads into the center of lumpy coke with the rising of temperature and is equally distributed on the edges of pores at 1200°C. Besides, oxidation reactions of functional groups become faster with the catalysis of K.content

  14. Warum Normen für die Instandhaltung?

    NASA Astrophysics Data System (ADS)

    Tschuschke, Werner E.

    Viele kennen Normen wie Konstruktionsnormen, in denen z. B. der Außendurchmesser, die Steigung, der Flankenwinkel und andere Maße eines Gewindes festgelegt sind. Es gibt Prüfnormen aber auch Normen eines Managementsystems wie des Qualitätsmanagements in der DIN-EN-ISO-9000-Familie. Aber warum Normen für die Instandhaltung? Begonnen hat es mit der DIN 31051, die 1985 veröffentlicht wurde. Es war die erste Instandhaltungsnorm weltweit und sie wurde von der Schweiz und Österreich übernommen. In ihr sind Begriffe der Instandhaltung, Grundlagen zum Abnutzungsprozess und Aktivitäten der Instandhaltung beschrieben. Es wurde der Begriff Instandsetzung statt Reparatur publiziert: Nicht mehr Flickschustern sondern einen funktionsfähigen Anlagenzustand möglichst erhalten.

  15. Canning Of Powdered Metal For Hot Isostatic Pressing

    NASA Technical Reports Server (NTRS)

    Juhas, John J.

    1989-01-01

    Quality of specimen enhanced by improved canning process. Method developed for canning specimens for hot isostatic pressing. Specimen placed inside refractory-metal ring, then sandwiched between two refractory-metal face sheets. Assembly placed inside die, then positioned in vacuum hot press. Heated to set temperature at prescribed vacuum to burn off all of binder in specimen. Advantages: powder-metallurgy composite totally purged of binder sealed in can in single operation, maintains size, shape, and uniformity of specimen. Weld region does not recrystallize, and little possibility of cracking.

  16. The dying thoracic patient.

    PubMed

    Krishna, G; Raffin, T A

    1998-08-01

    Health care providers should understand that the practice of good medicine includes not only diagnosing and curing diseases, but also effectively communicating with patients and families and helping terminally ill patients die a peaceful and dignified death. Patients in America come from varied backgrounds, and it is important for physicians to consider cultural and religious issues. Physicians should combine their clinical judgment with objective outcome data to provide optimal care for patients. Informed consent should be obtained from patients after offering a detailed plan of care that would include appropriate interventions and the consequences of no intervention. The physician should then assist the patient in making a decision that would provide the best possible future for that individual. The four fundamental principles of biomedical ethics, namely beneficence, nonmaleficence, autonomy, and justice, should be considered when analyzing an ethical problem. Voluntary active euthanasia, which means performing a deliberate act (e.g., administering a lethal injection) to end a patient's life, should not be performed by a physician. Withholding and withdrawing basic and advanced life support constitutes passive euthanasia. Good communication with patients early in the clinical course whenever possible results in an ethically correct decision. A nonconfrontational, sympathetic, and compassionate approach to family members and legal surrogates facing the immediate death of their loved ones leads to the best possible outcome. It is the duty of the physician to assure the patient and the family that he or she will not abandon the patient. Effective communication is the key to solving almost all ethical dilemmas when caring for the dying thoracic patient. PMID:9742345

  17. Direct printing of silver nanoparticles by an agarose stamp on planar and patterned substrates

    NASA Astrophysics Data System (ADS)

    Kao, Yu-Chih; Hong, Franklin Chau-Nan

    2011-05-01

    In this study, we have used an agarose stamp to conduct direct printing of silver nanoparticles, nanowires and nanoplates on both planar and structured substrates. Nanoparticle solution could be first coated on an agarose stamp, and then transferred to a planar substrate. Micro-patterns comprising metal nanoparticles could be printed on planar substrates without the formation of residual layers. Thus a three-dimensional metal microstructure could be easily fabricated. The patterning of electrodes by printing Ag nanowires directly on TiO2 was also demonstrated to fabricate resistive random access memory (RRAM) devices by all-solution-processing methods. By using a flat agarose stamp, the patterns printed on the microstructured substrates were quite different from those on the nanostructured substrates. On the microstructured substrates, direct printing could print silver nanoparticles onto the protrusion surface, and could print silver layers as thick as several microns, useful for high conductivity electrodes. On the substrates with nanostructures such as photonic crystals or nano-gratings, direct printing could transfer nanoparticles into the grooves or cavities only due to the contact of the agarose stamp with the groove or concavity surface. A new approach to fabricate metal wire grid polarizers was further demonstrated. A nanoporous agarose stamp has a good potential for printing using nanoparticle suspension.

  18. Computer Technology Institute & Press "DIOPHANTUS"

    E-print Network

    Bouras, Christos

    . . . . . . . . . Computer Technology Institute & Press "DIOPHANTUS" Research Unit 6 http://ru6.cti.gr Networks, Telematics and New Services 2014 #12;Computer Technology Institute & Press "Diophantus" - Research Unit 6 Computer Technology Institute & Press "DIOPHANTUS" The Computer Technology Institute

  19. Die Macht des Krokodils1

    Microsoft Academic Search

    ANGELIKA LOHWASSER

    In der ägyptischen Mythologie hat das Krokodil einen höchst ambivalenten Charakter. Einerseits ist es das gefährliche Ungeheuer, das den Menschen im und am Nil tötet, andererseits wurde es in verschiedenen Regionen göttlich verehrt. Die Verehrung dürfte vor allem eine Besänftigung des Raubtieres zum Ziel haben - die Furcht vor dem todbringenden Wassertier bewirkte den Glauben an ein göttliches Wesen, dessen

  20. How to register for sports courses at ZHS 1 Check the offer! 2 Buy your sports stamp... 3 Register for the course... 4 Pick up your sports ID and stamp... and have fun!

    E-print Network

    Cengarle, María Victoria

    the sports ID... Click here to buy the stamp for the students sports program of the current semester! #12;For student card · your passport or ID · a photo (no photo copy!) #12;Click here! #12;#12;PrintHow to register for sports courses at ZHS 1 Check the offer! 2 Buy your sports stamp... 3 Register

  1. Influence of un-cured PDMS chains in stamp using PDMS-based lithography

    NASA Astrophysics Data System (ADS)

    Kim, Jinook; Park, Mikyung; Chae, Gee Sung; Chung, In-Jae

    2008-06-01

    We present the compatibility of elastomeric stamp, poly(dimethylsiloxane) (PDMS), with inks for non-photolithography. This ink limitation is important in considering the lamination of hydrophilic solution on the patterned ink surface using an elastomeric stamp. We focus on an increase of the hydrophobicity of the patterned surface due to diffusion of low molecular weight (LMW) silicone polymer chains. This hydrophobicity increases inversely with the PDMS-ink interaction parameter ( ?), which is correlated with the solubility parameter ( ?). This study's results translate into proposed design factors for ink used in the patterned functional layer for PDMS-based lithography. Both the XPS and the contact angle measurement show that the hydrophobicity can be increased by LMW PDMS chains transfer from stamps, and this increase can cause the expansion of the free volume in PDMS pores through a swelling effect.

  2. Printing of sub-100-nm metal nanodot arrays by carbon nanopost stamps.

    PubMed

    Lee, Sang Ho; Cho, Byungjin; Yoon, Seungha; Jeong, Huisu; Jon, Sangyong; Jung, Gun Young; Cho, Beong Ki; Lee, Takhee; Kim, Won Bae

    2011-07-26

    This work reports an efficient method to fabricate hexagonally patterned metal nanodot arrays at the sub-100-nm scale, which is based on contact printing via novel nanometer-scaled stamps. Vertically aligned carbon nanoposts, supported by hexagonally ordered nanochannels of anodic aluminum oxide templates, are employed as the stamping platform to directly transfer controlled metal nanodot arrays. Using the fabrication platform, a number of patterned metal nanodot arrays made of Au, Cu, Ni, Ag, Pt, Al, and Ti can be contact-printed over large substrate areas in ambient conditions. The size, density, and interdistance of the printed nanodots are controllable with a tight correspondence to the mother stamp geometries, which can be precisely tuned by modifying the pore dimensions of the alumina matrixes. An advanced example of contact printing of metal nanoparticles is successfully demonstrated by the controlled formation of nanodot arrays in a specific area. PMID:21699221

  3. Numerical simulation of temperature field, microstructure evolution and mechanical properties of HSS during hot stamping

    SciTech Connect

    Shi, Dongyong; Liu, Wenquan [Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian, 116024, P.R. (China); Ying, Liang, E-mail: pinghu@dlut.edu.cn; Hu, Ping, E-mail: pinghu@dlut.edu.cn; Shen, Guozhe [Key Laboratory of Structural Analysis for Industrial Equipment, School of Automotive Engineering, Dalian University of Technology, Dalian, 116024, P.R. (China)

    2013-12-16

    The hot stamping of boron steels is widely used to produce ultra high strength automobile components without any spring back. The ultra high strength of final products is attributed to the fully martensitic microstructure that is obtained through the simultaneous forming and quenching of the hot blanks after austenization. In the present study, a mathematical model incorporating both heat transfer and the transformation of austenite is presented. A FORTRAN program based on finite element technique has been developed which permits the temperature distribution and microstructure evolution of high strength steel during hot stamping process. Two empirical diffusion-dependent transformation models under isothermal conditions were employed respectively, and the prediction capability on mechanical properties of the models were compared with the hot stamping experiment of an automobile B-pillar part.

  4. 7 CFR Appendix A to Part 277 - Principles for Determining Costs Applicable to Administration of the Food Stamp Program by State...

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ...Determining Costs Applicable to Administration of the Food Stamp Program by State Agencies A Appendix...the Department of Agriculture (Continued) FOOD AND NUTRITION SERVICE, DEPARTMENT OF AGRICULTURE FOOD STAMP AND FOOD DISTRIBUTION PROGRAM...

  5. 7 CFR Appendix A to Part 277 - Principles for Determining Costs Applicable to Administration of the Food Stamp Program by State...

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ...Determining Costs Applicable to Administration of the Food Stamp Program by State Agencies A Appendix...the Department of Agriculture (Continued) FOOD AND NUTRITION SERVICE, DEPARTMENT OF AGRICULTURE FOOD STAMP AND FOOD DISTRIBUTION PROGRAM...

  6. 7 CFR Appendix A to Part 277 - Principles for Determining Costs Applicable to Administration of the Food Stamp Program by State...

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ...Determining Costs Applicable to Administration of the Food Stamp Program by State Agencies A Appendix...the Department of Agriculture (Continued) FOOD AND NUTRITION SERVICE, DEPARTMENT OF AGRICULTURE FOOD STAMP AND FOOD DISTRIBUTION PROGRAM...

  7. Stamping-based planarization of flexible substrate for low-pressure UV nanoimprint lithography.

    PubMed

    Altun, Ali Ozhan; Jeong, Jun-Ho; Jung, Sung-Un; Kim, Ki-Don; Choi, Dae-Geun; Choi, Jun-Hyuk; Shim, Jong-Youp; Lee, Dong-Il; Lee, Eung-Sug

    2008-11-01

    Patterning flexible substrates in nano scale is an important and challenging issue in the fabrication of next-generation devices based on a non-silicon substrate. Step and Flash imprint lithography (S-FIL) which is a room temperature and low pressure process offers several important advantages, such as the use of a smaller and therefore cheaper stamp or the possibility of the overlay imprinting, as a transparent stamp is utilized. However, it is very difficult to perform S-FIL on a flexible substrate successfully due to the high waviness. The waviness of a flexible substrate is not a constant value in contrast to a rigid substrate. It depends on the imprint pressure applied onto the substrate. In this paper, in section two, the effect of the imprint pressure on the waviness of the surface of the flexible substrate is examined. It is proved that the waviness of the surface of the flexible substrate could not be reduced sufficiently to assure a successful imprint at low imprint pressures. In the third section, a method of patterning polymer substrates using ultra-violet nanoimprint lithography (UV-NIL) is presented. The method consists of two stages, stamping-based planarization and S-FIL. In stamping-based planarization, a planarization layer of transparent polymer is formed onto the flexible substrate. Waviness of the blank stamp (in this study, glass wafer) is transferred to the planarization layer. S-FIL is performed with the nanoimprint tool IMPRIO100 directly onto the planarization layer employing a 1 x 1 in. quartz stamp. Optical microscope and SEM images of the successfully imprinted patterns were also presented. PMID:19198287

  8. Millimeter-scale contact printing of aqueous solutions using a stamp made out of paper and tape

    E-print Network

    Prentiss, Mara

    three-dimensional, microfluidic, paper-based analyt- ical devices (3D-mPADs) as ``stamps'' (eMillimeter-scale contact printing of aqueous solutions using a stamp made out of paper and tape This communication describes a simple method for printing aqueous solutions with millimeter-scale patterns

  9. Investigation of the Phase Formation of AlSi-Coatings for Hot Stamping of Boron Alloyed Steel

    Microsoft Academic Search

    R. Veit; H. Hofmann; R. Kolleck; S. Sikora

    2011-01-01

    Hot stamping of boron alloyed steel is gaining more and more importance for the production of high strength automotive body parts. Within hot stamping of quenchenable steels the blank is heated up to austenitization temperature, transferred to the tool, formed rapidly and quenched in the cooled tool. To avoid scale formation during the heating process of the blank, the sheet

  10. Has the Food Stamp Program become More Accessible? Impacts of Recent Changes in Reporting Requirements and Asset Eligibility Limits

    ERIC Educational Resources Information Center

    Hanratty, Maria J.

    2006-01-01

    This paper uses data from the 1996 and 2001 panels of the Survey of Income and Program Participation to assess the impact of recent policy initiatives intended to increase access to Food Stamps. It finds that reductions in state certification requirements increased Food Stamp participation rates of income-eligible families with children by one to…

  11. Reglement fr die Subkommission fr die Lehre in der Zahnmedizin an der Medizinischen Fakultt

    E-print Network

    Senn, Walter

    Reglement für die Subkommission für die Lehre in der Zahnmedizin an der Medizinischen Fakultät der Universität Bern, beschliesst: Zusammensetzung Art. 1 1 Die Subkommission für die Lehre in der Zahnmedizin Die Subkommission für die Lehre in der Zahnmedizin entspricht dem erweiterten Direktorium der

  12. Nanotransfer printing using plasma etched silicon stamps and mediated by in situ deposited fluoropolymer.

    PubMed

    Bhandari, Deepak; Kravchenko, Ivan I; Lavrik, Nickolay V; Sepaniak, Michael J

    2011-05-25

    This communication describes a simple method that uses a thin film of octafluorocyclobutane (OFCB) polymer for efficient nanoscale transfer printing (nTP). Plasma polymerization of OFCB produces a Teflon-like fluoropolymer which strongly adheres and conformally covers a 3-D inorganic stamp. The inherently low surface energy of in situ deposited OFCB polymer on nanoscale silicon features is demonstrated as a unique nanocomposite stamp to fabricate various test structures with improved nTP feature resolution down to sub-100 nm. PMID:21526774

  13. The restoration of obliterated stamped serial numbers by ultrasonically induced cavitation in water

    NASA Technical Reports Server (NTRS)

    Young, S. G.

    1973-01-01

    Seventeen out of 21 obliterated stamped serial numbers on test specimens of copper, brass, steel, and aluminum were successfully restored. Cavitation induced in water by a piezoelectric transducer was the mechanism used. Primarily, smeared metal was removed from the number grooves by the force of the cavitation, however, numbers were also restored at depths at or below the level of the stamped grooves. The feasibility of this technique as a low cost tool for crime laboratories has been clearly demonstrated. The technique is applicable to a variety of materials, and no previous surface or chemical treatments are necessary.

  14. PUBLISHED BY Microsoft Press

    E-print Network

    Hunt, Galen

    #12;PUBLISHED BY Microsoft Press A Division of Microsoft Corporation One Microsoft Way Redmond, Washington 98052-6399 Copyright © 2011 by Microsoft Corporation All rights reserved. No part of the contents. Microsoft Press books are available through booksellers and distributors worldwide. For further information

  15. PUBLISHED BY Microsoft Press

    E-print Network

    Narasayya, Vivek

    #12;PUBLISHED BY Microsoft Press A Division of Microsoft Corporation One Microsoft Way Redmond, Washington 98052-6399 Copyright © 2010 by Microsoft Corporation All rights reserved. No part of the contents the British Library. Microsoft Press books are available through booksellers and distributors worldwide

  16. PUBLISHED BY Microsoft Press

    E-print Network

    Twente, Universiteit

    #12;PUBLISHED BY Microsoft Press A Division of Microsoft Corporation One Microsoft Way Redmond, Washington 98052-6399 Copyright © 2010 by Microsoft Corporation All rights reserved. No part of the contents from the British Library. Microsoft Press books are available through booksellers and distributors

  17. UNIVERSITY of WASHINGTON PRESS

    E-print Network

    Manchak, John

    UNIVERSITY of WASHINGTON PRESS Fall 2014 #12;CONTENTS NEW BOOKS1 CONTACT INFO49 SALES of Washington Press e-books from UPCC/Project Muse, ebrary, and EBSCO/ NetLibrary. Individuals may purchase our of the "Songs of Lake Anavatapta"30 Umatilla Dictionary11 Vacationland7 Welcome to Resisterville44 Wilderburbs6

  18. Die Straftat der Vergewaltigung in Polen

    Microsoft Academic Search

    Eleonora Zieli?ska

    \\u000a Im Zuge der Verstärkung des Personenverkehrs über die Grenzen nimmt die Zahl der Kontakte zwischen polnischen und deutschen\\u000a Bürgern zu, darunter auch die der intimen. Gleichzeitig dazu steigt auch das Risiko der Verübung von Straftaten gegen die\\u000a sexuelle Selbstbestimmung, insbesondere der Vergewaltigung (Art. 197 k.k. - polnisches Strafgesetzbuch). Das Verbrechen der\\u000a Vergewaltigung wird, ebenso wie z.B. die Mißhandlung, die sexuelle

  19. Fabrication of Ni stamp with high aspect ratio, two-leveled, cylindrical microstructures using dry etching and electroplating

    NASA Astrophysics Data System (ADS)

    Singh Petersen, Ritika; Sylvest Keller, Stephan; Hansen, Ole; Boisen, Anja

    2015-05-01

    We describe a process for the fabrication of a Ni stamp that is applied to the microstructuring of polymers by hot embossing. The target devices are microcontainers that have a potential application in oral drug delivery. Each container is a 3D, cylindrical, high aspect ratio microstructure obtained by defining a reservoir and a separating trench with different depths of 85 and 125?µm, respectively, in a single embossing step. The fabrication of the required two leveled stamp is done using a modified DEEMO (dry etching, electroplating and molding) process. Dry etching using the Bosch process and electroplating are optimized to obtain a stamp with smooth stamp surfaces and a positive sidewall profile. Using this stamp, hot embossing is performed successfully with excellent yield and high replication fidelity.

  20. Legendary Filmmaker Dies at age 95

    NSDL National Science Digital Library

    Green, Marcia.

    Legendary filmmaker Billy Wilder, who went from being a crime reporter in Vienna and a refugee from Nazism to becoming the creator of such classic films as Some Like It Hot and Sunset Boulevard, died at the age of 95 at his home in Beverly Hills this past Wednesday. With an extensive movie career that spans several decades, Wilder was the recipient of six Oscars and was the first filmmaker to win three Academy Awards in a single year. He was a master storyteller who specialized in exploring the dark side of American life with a cynicism and humor that few movie makers have ever matched. A writer, director, and producer, Wilder produced some of the industry's best dramas, like Double Indemnity and The Lost Weekend, as well as some of its funniest farces -- Some Like It Hot and The Fortune Cookie. He also was the man who first paired Jack Lemmon and Walter Matthau, creating one of the screen's most beloved comic teams.Wilder was born Samuel Wilder on June 22, 1906, in the Polish town of Sucha, then part of the Austro-Hungarian Empire. His mother nicknamed him Billy because of her fascination with the Western hero Buffalo Bill. In 1924, after briefly attending the University of Vienna, Wilder landed a job as a police reporter. His aggressive journalism led him to Berlin, where, enchanted by the city's film community, he decided to become a movie maker. For more information on this story, viewers may access the first two articles published by the United International Press and the Associated Press respectively. Those interested in a list of Wilder's many films may access the third site, also by the Associated Press. Sites four and five both give tribute to this filmmaking icon. Offered by the American Cinema, the first tribute provides biographical information on Wilder, as well as information on his filmography, academy awards, and co-screen writers. The second tribute offers various links to other Billy Wilder sites. Finally, the last site list quotations by Billy Wilder taken from "Conversations with Wilder" by Cameron Crowe.

  1. The direct economic effects of a policy to provide government subsidized price discounts for the purchase of fruit and vegetable by food stamp recipients.

    E-print Network

    California at Davis, University of

    for the purchase of fruit and vegetable by food stamp recipients. by Karen M. Jetter Assistant Research Economist price discounts on fresh fruit and vegetable to food stamp recipients. The suggestion for a price discount on fruit and vegetable for food stamps recipients is contained in the 2004 Farm Bill, section 4116

  2. Universally Composable Time-Stamping Schemes with Audit Ahto Buldas1,2,3, , Peeter Laud1,2, , Mart Saarepera, and Jan Willemson1,4

    E-print Network

    Universally Composable Time-Stamping Schemes with Audit Ahto Buldas1,2,3, , Peeter Laud1,2, , M, Estonia. 4 Playtech Estonia. Abstract. We present a universally composable time-stamping scheme based. The scheme turns out to be nearly optimal ­ we prove that in every universally composable auditable time-stamping

  3. Computer aided analysis and design of sheet metal forming processes

    Microsoft Academic Search

    M. Firat

    2007-01-01

    The finite element simulations of a sheet metal forming process help the methods and tooling engineer designing the forming interface for a stamping part by shifting the costly press shop try-outs to the computer aided design environment. The finite element models used in the sheet metal formability and stamping feasibility assessment studies are commonly based on the ideally rigid die-face

  4. Die fermentative Spaltung des Acetylcholins

    Microsoft Academic Search

    R. Ammon

    1934-01-01

    Zusammenfassung Es wird eine neue Methode zum Nachweis des Fermentes, das Acetylcholin in Cholin und Essigsäure hydrolysiert, die Cholinesterase, beschrieben. Das Verfahren ist nach derWarburgschen Methode aufgebaut.

  5. UNIVERSIT DE GENVE Dies Academicus

    E-print Network

    Loewith, Robbie

    Dufour, Auditoire Piaget Palmarès de l'année civile 1999 #12;Programme officiel de la journée du Dies connaissance Allocution de Monsieur Jean-Luc FALCONE Membre du Conseil de l'Université Représentant des

  6. Press laws in North Korea

    Microsoft Academic Search

    Kyu Ho Youm

    1991-01-01

    The press in the Democratic People's Republic of Korea (North Korea) is closely tied to its communist sociopolitical structures. The North Korean press finds its modus operandi in the ‘Soviet Communist’ theory for its relationship with its government. This study examines the press laws and regulations in North Korea, pursuing three questions: (1) What is the status of the press

  7. Destination Disney: Die japanischen Erfahrungen

    Microsoft Academic Search

    Ute Hoffmann

    Die Präsenz Japans auf dem internationalen Markt kultureller Produkte ist unübersehbar. Mangas und Anime finden weltweit begeisterte\\u000a Leser und Zuschauer. Die Pokémon-Zeichentrickserie erreichte beispielsweise in Deutschland über 70% der fernsehenden Kinder.\\u000a Der „Geist“ Japans mutiert in den Labors von Kosmetikherstellern und den Werkstätten von Innenausstattern zum Lebensstilemblem\\u000a und Ethno-Accessoire eines vorwiegend westlichen Publikums. Kaum ein Einkaufszentrum hierzulande und anderswo kommt

  8. MPI Must Evolve or Die

    Microsoft Academic Search

    Al Geist

    2008-01-01

    Multicore and hybrid architecture designs dominate the landscape for systems that are 1 to 20 petaflops peak performance.\\u000a As such the MPI software must evolve to effectively use these types of architectures or it will die just like the vector programming\\u000a models died. While applications may continue to use MPI, it is not business as usual in how communication libraries

  9. Salicylatreiche Weiden für die Arzneimittelherstellung

    Microsoft Academic Search

    Nadja Förster; Christian Ulrichs; Matthias Zander; Ralf Kätzel; Inga Mewis

    2009-01-01

    Zusammenfassung  Die Verwendung eines möglichst salicylatreichen Ausgangsmaterials für die Herstellung von Phytopharmaka aus Weidenrinde ist\\u000a für eine ökonomische Arzneimittelherstellung notwendig. Nur so können günstige, pflanzliche Produkte auf den Markt gelangen,\\u000a welche von der Bevölkerung käuflich erworben werden, um fieberhafte Erkrankungen, Rheuma oder Kopfschmerzen behandeln zu können.\\u000a Um geeignetes Rindenmaterial zu finden, wurden Klone von den drei Weidenarten Salix daphnoides, Salix pentandra

  10. 31 CFR 500.410 - Currency, coins, and postage and other stamps.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ...and postage and other stamps issued by North Korea, North Viet-Nam, Cambodia, or South Viet-Nam are merchandise of North Korean, North Vietnamese, Cambodian, or South Vietnamese origin subject to § 500.204(a)(1). [41 FR 16554, Apr....

  11. Service-Learning with a Food Stamp Enrollment Campaign: Community and Student Benefits

    ERIC Educational Resources Information Center

    Porter, Judith R.; Summers, Mary; Toton, Suzanne; Aisenstein, Hillary

    2008-01-01

    We analyze a multi-campus collaboration in a Food Stamp Enrollment Campaign to demonstrate that a well-managed public benefits campaign, associated with broader advocacy-based community partnerships, can result in positive outcomes for the community that include measurable benefits for clients, data needed to make policy and administrative…

  12. Food Stamp and School Lunch Programs Alleviate Food Insecurity in Rural America. Fact Sheet

    ERIC Educational Resources Information Center

    Smith, Kristin; Savage, Sarah

    2007-01-01

    The Food Stamp and the National School Lunch Programs play a vital role in helping poor, rural Americans obtain a more nutritious diet and alleviate food insecurity and hunger. This fact sheet looks at the extent to which rural America depends on these programs and describes characteristics of beneficiaries of these federal nutrition assistance…

  13. Hawaii Food Stamp Employment and Training/JOBS Conformance Demonstration: Cost Evaluation Final Report.

    ERIC Educational Resources Information Center

    Norris, Dave N.; King, Christopher T.

    An evaluation was conducted of the Hawaii Food Stamp Employment and Training (FSE&T)/Job Opportunities and Basic Skills Program Conformance Demonstration, known as PRIDE (Positive Response in Developing Employment). The cost component determined impact of the demonstration on costs of administering and providing activity components and support…

  14. Falling through the Social Safety Net: Food Stamp Use and Nonuse among Older Impoverished Americans

    ERIC Educational Resources Information Center

    Fuller-Thomson, Esme; Redmond, Melissa

    2008-01-01

    Purpose: Older adults are less likely than any other age group to use the federal Food Stamp Program. The personal and social costs of elderly diet insufficiency include disease exacerbation, depression, and increased hospitalization. In order to improve targeting and outreach efforts, this study identifies the characteristics of eligible older…

  15. Hawaii Food Stamp Employment and Training/JOBS Conformance Demonstration: Impact Evaluation Final Report.

    ERIC Educational Resources Information Center

    Schexnayder, Deanna T.; Olson, Jerome A.

    An evaluation was conducted of the Hawaii Food Stamp Employment and Training/Job Opportunities and Basic Skills Program Conformance Demonstration, known as PRIDE (Positive Response in Developing Employment). The impact analysis examined client participation patterns, services, and employment outcomes. A pre-post/demonstration-comparison site…

  16. A Fully Automated and Robust Method to Incorporate Stamping Data in Crash, NVH and Durability Analysis

    Microsoft Academic Search

    Hariharasudhan Palaniswamy; Narayan Kanthadai; Subir Roy; Erwan Beauchesne

    2011-01-01

    Crash, NVH (Noise, Vibration, Harshness), and durability analysis are commonly deployed in structural CAE analysis for mechanical design of components especially in the automotive industry. Components manufactured by stamping constitute a major portion of the automotive structure. In CAE analysis they are modeled at a nominal state with uniform thickness and no residual stresses and strains. However, in reality the

  17. Organic thin film transistors and polymer light-emitting diodes patterned by polymer inking and stamping

    Microsoft Academic Search

    Dawen Li; L. Jay Guo

    2008-01-01

    To fully realize the advantages of organic flexible electronics, patterning is very important. In this paper we show that a purely additive patterning technique, termed polymer inking and stamping, can be used to pattern conductive polymer PEDOT and fabricate sub-micron channel length organic thin film transistors. In addition, we applied the technique to transfer a stack of metal\\/conjugated polymer in

  18. Transfer printing of 3D hierarchical gold structures using a sequentially imprinted polymer stamp

    Microsoft Academic Search

    Fengxiang Zhang; Hong Yee Low

    2008-01-01

    Complex three-dimensional (3D) hierarchical structures on polymeric materials are fabricated through a process referred to as sequential imprinting. In this work, the sequentially imprinted polystyrene film is used as a soft stamp to replicate hierarchical structures onto gold (Au) films, and the Au structures are then transferred to a substrate by transfer printing at an elevated temperature and pressure. Continuous

  19. 1. WELDING SHALL BE PERFORMED IN ACCORDANCE WITH ASME SECTION IX. NO CODE STAMP REQUIRED.

    E-print Network

    McDonald, Kirk

    NOTES 1. WELDING SHALL BE PERFORMED IN ACCORDANCE WITH ASME SECTION IX. NO CODE STAMP REQUIRED. 2. ALL WELDS SHALL BE DYE PENETRANT INSPECTED. NO RADIOGRAPHY REQUIRED. 3. MATERIAL CERTIFICATIONS HOSE W/TUBING ENDS, 13.5 FACE-TO-FACE N/A 3 1 swagelok 1.0 pipe weld connector SS - 316L SWAGELOK PIPE

  20. Design of Tools for Stamping in Reactive Powder Concrete for Thin Sheets

    Microsoft Academic Search

    Ahmed Tafraoui; Soltane Lebaili

    2006-01-01

    We proposed to produce tools for stamping out of reactive powder concrete which substitutes the resin concrete tools covered with a resin with cast (freezing-coat) for the prototype parts (< 100 parts), in order to decrease the deadlines, to simplify the manufacturing process and to reduce the costs in the automobile body. A bench of abrasive wear was developed to

  1. Program Evaluation: Food Stamps and Commodity Distribution in Rural Areas of Central Pennsylvania.

    ERIC Educational Resources Information Center

    Madden J. Patrick; Yoder, Marion D.

    Since one primary goal of the Commodity Distribution (CD) Program and the Food Stamp (FS) Program is to improve diets of low-income families, this 1969-70 study focused on whether the adequacy of a low-income family's dietary intake was improved by their participation in a food-assistance program. As stated, the adequacy of a family's dietary…

  2. Ramón y Cajal erroneously identified as Camillo Golgi on a souvenir postage stamp.

    PubMed

    Triarhou, Lazaros C; del Cerro, Manuel

    2012-01-01

    Focusing on a philatelic oddity that erringly identifies a picture of Santiago Ramón y Cajal as that of Camillo Golgi, this brief article examines official and unofficial stamp issues honoring the two great neuroanatomists, one from Spain and the other from Italy, who were early Nobel Prize winners in Physiology or Medicine. PMID:22428735

  3. Page 1 of 3 Adding a Punch or Reconciling Time for Time Stamp and Time Clock

    E-print Network

    Hutcheon, James M.

    Page 1 of 3 Adding a Punch or Reconciling Time for Time Stamp and Time Clock Users A punch will punch in and out. 1) Click My QuickNavs Tab. Select Reconcile Time . 2) If an employee does not appear, SAVE it, and even approve their time card. The Missed Punch column will highlight which of your

  4. The MPEG4 Streaming Player Using Adaptive Decoding Time Stamp Synchronization

    Microsoft Academic Search

    D. Lee; N. Kim; S. Kim

    2002-01-01

    This paper introduces the MPEG-4 streaming player offering the streaming service of the MPEG-4 visual standard by applying the adaptive Decoding Time Stamp (DTS) synchronization. The player uses the general development interfaces; it is also interoperable in different systems because it streams the international standard, MPEG-4 visual. Likewise, it minimizes the dependence of the systems resources as it utilizes the

  5. The Contingent Use of Trading Stamps in Reducing Truancy: A Case Report.

    ERIC Educational Resources Information Center

    Zweig, John T.; And Others

    1979-01-01

    A 13-year-old learning-disabled subject received a daily amount of trading stamps contingent on school attendance. Results showed a significant decrease in truancy from three to four days per week to less than one. A reversal design indicated that truancy could be controlled by the contingency procedure. (Author/GDC)

  6. Failure Analysis of Warm Stamping of Magnesium Alloy Sheet Based on an Anisotropic Damage Model

    NASA Astrophysics Data System (ADS)

    Zhao, P. J.; Chen, Z. H.; Dong, C. F.

    2014-08-01

    Based on the frame work of continuum damage mechanics, a research work of anisotropic damage evolution in warm stamping process of magnesium alloy sheets has been carried out by means of a combined experimental-numerical method. The aim was to predict formability of warm stamping of AZ31 Mg alloy sheets by taking the thermal and damage effects into account. In the presented work, a temperature-dependent anisotropic yield function suitable for cold rolling sheet metals together with an anisotropic damage model was implemented into the a VUMAT subroutine for ABAQUS/EXPLICIT. The evolution of internal damage in the form of void growth and coalescence in AZ31 Mg alloy sheet was observed by means of scanning electron microscopy (SEM). Moreover, a coupled thermo-mechanical simulation of the stamping process was performed using the implemented code at different temperatures. The parameters employed in the simulation were determined by the standard tensile tests and algebraic manipulation. The overall anisotropic damage process from crack initiation to final propagation in local area of blank was simulated. Numerical results show that the prediction of the site of crack initiation and the orientation of crack propagation are consistent with the data observed in warm stamping experiments.

  7. Failure Analysis of Warm Stamping of Magnesium Alloy Sheet Based on an Anisotropic Damage Model

    NASA Astrophysics Data System (ADS)

    Zhao, P. J.; Chen, Z. H.; Dong, C. F.

    2014-11-01

    Based on the frame work of continuum damage mechanics, a research work of anisotropic damage evolution in warm stamping process of magnesium alloy sheets has been carried out by means of a combined experimental-numerical method. The aim was to predict formability of warm stamping of AZ31 Mg alloy sheets by taking the thermal and damage effects into account. In the presented work, a temperature-dependent anisotropic yield function suitable for cold rolling sheet metals together with an anisotropic damage model was implemented into the a VUMAT subroutine for ABAQUS/EXPLICIT. The evolution of internal damage in the form of void growth and coalescence in AZ31 Mg alloy sheet was observed by means of scanning electron microscopy (SEM). Moreover, a coupled thermo-mechanical simulation of the stamping process was performed using the implemented code at different temperatures. The parameters employed in the simulation were determined by the standard tensile tests and algebraic manipulation. The overall anisotropic damage process from crack initiation to final propagation in local area of blank was simulated. Numerical results show that the prediction of the site of crack initiation and the orientation of crack propagation are consistent with the data observed in warm stamping experiments.

  8. 1. WELDING TO BE PERFORMED IN ACCORDANCE WITH ASME SECTION IX. NO CODE STAMP REQUIRED.

    E-print Network

    McDonald, Kirk

    45° W-1 3/16 G NOTES 1. WELDING TO BE PERFORMED IN ACCORDANCE WITH ASME SECTION IX. NO CODE STAMP REQUIRED. 2. ALL WELDS SHALL BE DYE PENETRANT INSPECTED. NO RADIOGRAPHY REQUIRED. 3. MATERIAL TITANIUM UPSTREAM DOUBLE BEAM WINDOW 203-HJT-0712 1 1 sec contain weldment hjt TI GRADE 2, ASTM B-265

  9. Determination of Proper Austenitization Temperatures for Hot Stamping of AISI 4140 Steel

    NASA Astrophysics Data System (ADS)

    Samadian, Pedram; Parsa, Mohammad Habibi; Shakeri, Amid

    2014-04-01

    High strength steels are desirable materials for use in automobile bodies in order to reduce vehicle weight and increase the safety of car passengers, but steel grades with high strength commonly show poor formability. Recently, steels with controlled microstructures and compositions are used to gain adequate strength after hot stamping while maintaining good formability during processing. In this study, microstructure evolutions and changes in mechanical properties of AISI 4140 steel sheets resulting from the hot stamping process at different austenitization temperatures were investigated. To determine the proper austenitization temperatures, the results were compared with those of the cold-worked and cold-worked plus quench-tempered specimens. Comparisons showed that the austenitization temperatures of 1000 and 1100 °C are proper for hot stamping of 3-mm-thick AISI 4140 steel sheets due to the resultant martensitic microstructure which led to the yield and ultimate tensile strength of 1.3 and 2.1 GPa, respectively. Such conditions resulted in more favorable simultaneous strength and elongation than those of hot-stamped conventional boron steels.

  10. MICROSTRUCTURE EVOLUTION AND MECHANICAL RESPONSE IN THE HOT STAMPING PROCESS AUTHORS

    Microsoft Academic Search

    Mats Oldenburg

    In the manufacturing of ultra high strength boron steel components with the hot stamping process, it is of great importance that the final product will have the desired material properties. This is especially true for safety related automotive components. Often the preferred microstructure is a mix of martensite and bainite. In this work a model is developed and implemented in

  11. A new approach for a thermo-mechanical coupled simulation of the hot stamping process

    Microsoft Academic Search

    K. Kassem-Manthey; H. Spiess; K. Srivastava; K. Wolf

    Nowadays, hot stamping of high strength steels is an attractive process for the manufacturing of crash relevant parts in the automotive industry. Due to forming at elevated temperatures, not only can the strength of the formed part be remarkably increased, but also the formability properties be significantly improved and the springback reduced to a minimum. In this paper, a new

  12. Application of a feasible formability diagram for the effective design in stamping processes of automotive panels

    Microsoft Academic Search

    Dae-Cheol Ko; Seung-Hoon Cha; Sang-Kon Lee; Chan-Joo Lee; Byung-Min Kim

    2010-01-01

    The objective of this study is to propose a method of process design that uses a feasible formability diagram, which denotes the safe region without fracture and wrinkle, for the effective and rapid design of stamping processes. To determine the feasible formability diagram, FE-analyses have been performed for combinations of process variables that correspond to the orthogonal array of design

  13. Simulation and Evaluation of Phase Transformations and Mechanical Response in the Hot Stamping Process

    Microsoft Academic Search

    Mats Oldenburg; Paul Kerström; Greger Bergman; Per Salomonsson

    2007-01-01

    When producing thin ultra high strength steel components with the hot stamping process it is essential that the final component achieves desirable material properties. This applies in particular to passive automotive safety components. Often the desirable microstructure consists of a mix of martensite and bainite. Therefore, it is of great importance to accurately predict the final microstructure of the component

  14. Impact Of The Material Variability On The Stamping Process: Numerical And Analytical Analysis

    Microsoft Academic Search

    Yann Ledoux; Alain Sergent; Robert Arrieux

    2007-01-01

    The finite element simulation is a very useful tool in the deep drawing industry. It is used more particularly for the development and the validation of new stamping tools. It allows to decrease cost and time for the tooling design and set up. But one of the most important difficulties to have a good agreement between the simulation and the

  15. A Comparative Analysis of Different Robust Design Approaches in Sheet Stamping Operations

    NASA Astrophysics Data System (ADS)

    Marretta, L.; Di Lorenzo, R.

    2011-05-01

    A crucial issue in sheet stamping optimization problems is related to the process robustness improvement: critical scattering in the investigated performances arises due to some noise variables influence, often evolving up design failure itself. In fact, strong variations in the final stamped part or fluctuations of strain distribution may lead to an uncontrolled process design. Such variability cannot be controlled but anyway it is possible to develop proper design tools able to identify robust process calibrations above which the noises variations effects are admissible. In this paper, a multi-objective optimization problem was analyzed, with the aim to minimize both excessive thinning and springback occurrences in a sheet stamping process of an aluminum alloy. In fact, major stamping operations are characterized by conflicting goals to be accomplished, introducing a further difficulty in the process variability control. Two kinds of robust design approaches were compared, a hybrid deterministic-stochastic framework and a dual response based approach, with the aim to analyze how each kind of approach may address the final design choices. Actually, the variability investigation may be considered as final robustness evaluation, otherwise the process may be calibrated under the stochastic effects of the noise variables.

  16. ORIENTATION FOR NEW GRADUATE STUDENTS Adele H. Stamp Student Union Tuesday, August 27, 2013

    E-print Network

    Gruner, Daniel S.

    InterVarsity Christian Fellowship C- Graduate Student Government M- Graduate Student Legal Aid Office D Graduate Student Summer Research Fellowships Graduate Student Summer Research Fellowships provide supportORIENTATION FOR NEW GRADUATE STUDENTS Adele H. Stamp Student Union Tuesday, August 27, 2013 AGENDA

  17. Minimization of the thickness variation in multi-step sheet metal stamping

    Microsoft Academic Search

    Y. Huang; Z. Y. Lo; R. Du

    2006-01-01

    This paper presents an efficient method to optimize the intermedial tool surfaces in the multi-step sheet metal stamping process to obtain improved quality of a product at the end of forming. The proposed method is based on a combination of finite element modeling (FEM) and the response surface method (RSM). The objective of the optimization is to minimize the thickness

  18. NUMERICAL AND EXPERIMENTAL STUDY OF THE ERICHSEN TEST FOR METAL STAMPING

    Microsoft Academic Search

    M. Akrout; M. Ben Amar; C. Chaker; F. Dammak

    In this article, we present some experimental results obtained from an ERICHSEN test. This test characterizes the faculty of the thin sheet stamping. In order to control the different parameters of this test, we make a confrontation between numerical results obtained with the finite elements software COSMOS\\/M and experimental results descended from tests realized on different material and thickness sheet

  19. Artificial intelligence applied to automatic supervision, diagnosis and control in sheet metal stamping processes

    Microsoft Academic Search

    C. García

    2005-01-01

    In sheet metal forming processes, any disturbance as a slight change in the mechanical properties of the material can be the reason for the occurrence of defects without changing any other of the process parameters.In order to avoid production breakdowns and to improve the reliability of the stamping process, an integrated automatic control has been designed and tested. This includes

  20. Determination of Strain Paths in Sheet Metal Stamped Pieces: A New Improved Method

    Microsoft Academic Search

    E. Carasusan; Fernando Canal

    2007-01-01

    Nowadays, continuous technological advances lead the industrial world toward increasingly competitive stages. Rigorous quality control has become an unavoidable step in the chain of production. Car industry uses sheet materials to shape them into different pieces using stamping techniques. A very useful concept to characterize the formability of sheet metal samples is to obtain their Forming Limit Diagrams (FLD). This