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1

Holding fixture for a hot stamping press  

NASA Technical Reports Server (NTRS)

A hand held guide for manually positioning a work piece between the anvil rib and tool of a hot die stamping press is described. A groove completed by interchangeable cover plates attached at one end of the guide conforms to a cross sectional dimension common to similar workpieces and, with a force fit, retentively holds each of the workpieces.

Harris, R. P. (inventor)

1983-01-01

2

Stamping Die Making. 439-318/320.  

ERIC Educational Resources Information Center

Each unit in this curriculum guide on stamping die making contains an introduction, objectives, materials required, lessons, space for notes, figures, and diagrams. There are 29 units in this guide, dealing with the following topics: EZ-MILL programming; EZ-MILL BATT; print of punch and EZ-MILL part programming; download to Computer Numerical…

Yunke, P.; And Others

3

PRESS SHOP. SEVEN BLISS PRESSES STAMP OUT A VARIETY OF ...  

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

PRESS SHOP. SEVEN BLISS PRESSES STAMP OUT A VARIETY OF CARTRIDGE AND SHELL CASINGS. THIS DEPARTMENT WAS TRANSFORMED FROM A MONEY-LOSING OPERATION TO A PROFIT CENTER UNDER THE FIRST WORKER-MANAGED QUALITY CIRCLE IN THE PLANT. - American Brass Foundry, 70 Sayre Street, Buffalo, Erie County, NY

4

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

SciTech Connect

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 and its industrial applications have greatly impacted automotive sheet metal product design, die developments, die construction and tryout, and production stamping. The stamping CAE community has successfully resolved the traditional formability problems such as splits and wrinkles. The evolution of the stamping CAE technology and business demands opens even greater opportunities and challenges to stamping CAE community in the areas of (1) continuously improving simulation accuracy, drastically reducing simulation time-in-system, and improving operationalability (friendliness) (2) resolving those historically difficult-to-resolve problems such as dimensional quality problems (springback and twist) and surface quality problems (distortion and skid/impact lines) (3) resolving total manufacturability problems in line die operations including blanking, draw/redraw, trim/piercing, and flanging, and (4) overcoming new problems in forming new sheet materials with new forming techniques. In this article, the author first provides an overview of the stamping CAE technology adventures and achievements, and industrial applications in the past decade. Then the author presents a summary of increasing manufacturability needs from the formability to total quality and total manufacturability of sheet metal stampings. Finally, the paper outlines the new needs and trends for continuous improvements and innovations to meet increasing challenges in line die formability and quality requirements in automotive stamping.

Wang Chuantao [General Motors Corp. Manufacturing Engineering, Die Center, 2000 Centerpoint, Pontiac, MI 48341 (United States)

2005-08-05

5

Prediction of press\\/die deformation for an accurate manufacturing of drawing dies  

Microsoft Academic Search

In this work a methodological scheme for a reduction of both the try-out and lead-time of complex dies is presented. The finite\\u000a element simulation of the system press\\/tool behaviour along the stamping process results in criteria for the best design of\\u000a high-cost dies\\/punches. Modifications of the main geometry, components and functional parameters are so recommended. Die deflection\\u000a during the pressing

D. Del Pozo; L. N. López de Lacalle; J. M. López; A. Hernández

2008-01-01

6

Sheet metal stamping die design for warm forming  

DOEpatents

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 allows a softer flow at a lower stress to enable material flow into the thinner, higher strain areas at the bend/s. The heating block is inserted into the die and is powered by a power supply.

Ghosh, Amit K. (Ann Arbor, MI)

2003-04-22

7

7. VIEW OF HYDRAULIC HAMMER STAMPING PRESS ON SIDE A ...  

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

7. VIEW OF HYDRAULIC HAMMER STAMPING PRESS ON SIDE A OF BUILDING 883. THIS TYPE OF PRESS WAS USED FOR BOTH STAINLESS STEEL AND FOR DEPLETED URANIUM. (7/2/86) - Rocky Flats Plant, Uranium Rolling & Forming Operations, Southeast section of plant, southeast quadrant of intersection of Central Avenue & Eighth Street, Golden, Jefferson County, CO

8

Automation of a stamping press using sequential hydraulic manipulators  

Microsoft Academic Search

The economic and technical feasibility of using pneumatic manipulation to automate a metal sheet stamping press was tested on a 2000 kN commercial machine. Results show that the pneumatic system is slower and less flexible than electromechanical methods. However, costs are lower and the system is interesting in cases of large series of work on slower machines, on curved pieces,

J. P. Devimeux; V. Escalup; B. Hoessler; M. Orriols; R. Thomas

1983-01-01

9

Simulation of Stamping Process of Automotive Panel Considering Die Deformation  

SciTech Connect

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.

Keum, Y.T. [Department of Mechanical Engineering, CPRC, Hanyang University, Seoul (Korea, Republic of); Ahn, I.H.; Lee, I.K.; Song, M.H.; Kwon, S.O.; Park, J.S. [GM Daewoo Auto and Technology, Tooling Center, Incheon (Korea, Republic of)

2005-08-05

10

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

Microsoft Academic Search

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

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

2005-01-01

11

Development of an object-oriented blackboard model for stamping process planning in progressive die design  

Microsoft Academic Search

This paper reports preliminary work to investigate the suitability of using a blackboard framework as a problem-solving model for stamping process planning in progressive die design. The model is described at two levels: knowledge level and computational level. The knowledge level describes how the stamping process planning domain is represented in a blackboard architecture. The computational level describes how the

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

2005-01-01

12

A Hybrid Intelligent System for Stamping Process Planning in Progressive Die Design  

E-print Network

This paper presents an intelligent, hybrid system for stamping process planning in progressive die design. The system combines the flexibility of blackboard architecture with case-based reasoning. The hybrid system has the ...

Zhang, W.Y.

13

Effects of geometry and fillet radius on die stresses in stamping processes  

Microsoft Academic Search

This paper describes the use of the finite element method to analyze the failure of dies in stamping processes. For the die analyzed in the present problem, the cracks at different locations can be attributed to a couple of mechanisms. One of them is due to large principal stresses and the other one is due to large shear stresses. A

J. S Sun; K. H Lee; H. P Lee

2000-01-01

14

A framework for development of an intelligent system for design and manufacturing of stamping dies  

NASA Astrophysics Data System (ADS)

An integration of computer aided design (CAD), computer aided process planning (CAPP) and computer aided manufacturing (CAM) is required for development of an intelligent system to design and manufacture stamping dies in sheet metal industries. In this paper, a framework for development of an intelligent system for design and manufacturing of stamping dies is proposed. In the proposed framework, the intelligent system is structured in form of various expert system modules for different activities of design and manufacturing of dies. All system modules are integrated with each other. The proposed system takes its input in form of a CAD file of sheet metal part, and then system modules automate all tasks related to design and manufacturing of stamping dies. Modules are coded using Visual Basic (VB) and developed on the platform of AutoCAD software.

Hussein, H. M. A.; Kumar, S.

2014-07-01

15

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

Microsoft Academic Search

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

L. C. Zhang; Z. Lin

1997-01-01

16

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

Microsoft Academic Search

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

Nam Ho Kim; Kyung Kook Choi; Jiun Shyan Chen

2001-01-01

17

Blank holding force control in panel stamping process using a database and FEM-assisted intelligent press control system  

Microsoft Academic Search

A database and FEM-assisted intelligent press control system was applied to sheet stamping process of trapezoidal panels. For applying the press control system to the stamping process of a non-symmetric shape, a radial assignment strategy of the process control line was proposed, and the average value of each process control line was employed as the entire process control value. In

Hiroshi Koyama; Robert H. Wagoner; Ken-ichi Manabe

2004-01-01

18

Application of an integrated CAD\\/CAE\\/CAM system for stamping dies for automobiles  

Microsoft Academic Search

The globalization and competition in the automobile industry makes it necessary to reduce the time spent on product development.\\u000a Therefore, computer aided product development has become one of the most important techniques in the automobile industry.\\u000a According to the concurrent engineering concept, an integrated CAD\\/CAE\\/CAM system for automobile stamping die development\\u000a is established. The system is based on 3D surface

Bor-Tsuen Lin; Chun-Chih Kuo

2008-01-01

19

A Hybrid Intelligent System for Stamping Process Planning in Progressive Die Design  

Microsoft Academic Search

This paper presents an intelligent, hybrid system for stamping process planning in progressive die design. The system combines the flexibility of blackboard architecture with case-based reasoning. The hybrid system has the advantage that it can use past knowledge and experience for case-based reasoning when it exists, and other reasoning approaches when it doesn't exist. A prototype system has been implemented

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

20

Designing services based on ‘intelligent’ press-die-systems  

Microsoft Academic Search

Forming technologies and deep drawing in particular play a key role in Germany’s industry regarding quality, costs and time.\\u000a The production system’s efficiency is thereby tremendously influenced both by timed and qualitative availability of press\\u000a and die. A detectably higher availability resp. service life of the entire press-die-system along with novel services for\\u000a a condition-oriented press and die maintenance represent

Guenther Schuh; Christoph Klotzbach; Fabian Gaus

21

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

SciTech Connect

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.

Wang Chuantao; Zhang, Jimmy J.; Goan, Norman [General Motors Corp. Manufacturing Engineering, Die Center, 2000 Centerpoint, Pontiac, MI 48341 (United States)

2005-08-05

22

Die design for stamping a notebook case with magnesium alloy sheets  

Microsoft Academic Search

In the present study, the stamping process for manufacturing a notebook top cover case with LZ91 magnesium–lithium alloy sheet at room temperature was examined using both the experimental approach and the finite element analysis. A four-operation stamping process was developed to eliminate both the fracture and wrinkle defects occurred in the stamping process of the top cover case. In order

Heng-Kuang Tsai; Chien-Chin Liao; Fuh-Kuo Chen

2008-01-01

23

Manufacture of die casting dies by hot isostatic pressing. CRADA final report  

SciTech Connect

The reason for this Cooperative Research and Development Agreement (CRADA) between the Oak Ridge National Laboratory (ORNL) and Doehler-Jarvis was to investigate the manufacture die-casting dies with internal water-cooling lines by hot-isostatic pressing (HIPing) of H13 tool steel powder. The use of HIPing will allow the near-net-shape manufacture of dies and the strategic placement of water-cooling lines during manufacture. The production of near-net-shape dies by HIPing involves the generation of HIPing diagrams, the design of the can that can be used for HIPing a die with complex details, strategic placement of water-cooling lines in the die, computer modeling to predict movement of the water lines during HIPing, and the development of strategies for placing water lines in the appropriate locations. The results presented include a literature review, particle analysis and characterization of H13 tool steel powder, and modeling of the HIPing process.

Viswanathan, S.; Ren, W.; Luk, K. [Oak Ridge National Lab., TN (United States); Brucher, H.G. [Doehler-Jarvis, Toledo, OH (United States)

1998-09-01

24

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

SciTech Connect

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.

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

25

Computer-aided structural design of drawing dies for stamping processes based on functional features  

Microsoft Academic Search

This paper describes a structural design system for 3D drawing dies based on functional features using a minimum set of initial\\u000a information. In addition, it is also applicable to assign the functional features flexibly before accomplishing the design\\u000a of a solid model for the main parts of a drawing die, such as upper die, lower die, and blank holder. The

Bor-Tsuen Lin; Ming-Ren Chang; Hau-Luen Huang; Chun-Yu Liu

2009-01-01

26

Basic Stamp  

NSDL National Science Digital Library

This site from Parallax, Inc. gives some information about basic stamp microcontrollers. A Basic-Stamp microcontroller is a single-board computer. Parallax makes a variety of controllers; the BASIC Stamp II uses a PIC16C57microchip.

27

Experimental investigation on the performance of an improved equal channel angular pressing die  

NASA Astrophysics Data System (ADS)

A major problem in Equal Channel Angular Pressing is die design. Friction plays an important role in the extrusion process. In the present work, Aluminium 6082 alloy was processed through a modified ECAP die originally proposed by Mathieu et al. in 2004 [1] and the performance of the die was analyzed. The channel angle was phi=90° and corner angle ?=20°. Mechanical properties, micro hardness measurement and crystalline size (D) were measured from the extruded specimen for both the conventional and new die designs. It has been found that the new die samples displayed better results than the conventional ones. The newly designed die reduced the effect of friction on the work piece, it increased the tensile strength, the hardness of the material and achieved better grain refinement.

Surendarnath, S.; Sankaranarayanasamy, K.; Ravisankar, B.

2014-08-01

28

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

SciTech Connect

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.

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

2008-06-19

29

Effects of Heat Treatments on the On-Line Service Life of a Press Die Manufactured by W-Edm  

NASA Astrophysics Data System (ADS)

Effects of heat treatments on the on-line service life of a press die manufactured by W-EDM are studied. In this work, four manufacturing processes for a press die are considered: (1) milling and then grinding, (2) wire-cut electric discharge machining (W-EDM), (3) low temperature heat treatment after W-EDM, and (4) high temperature heat treatment after W-EDM. On-line punching experiments for an automobile part of BL646-chain are performed. The amount of wear of the die and punch, roll-over and burnish depth in the punched chain are measured every 1,000 strokes. Overall productivities are carefully compared. Finally, it is concluded that heat treatment after W-EDM for a press die can enhance its on-line service life. Especially, high temperature heat treatment after W-EDM is very attractive as a fast and cheap manufacturing method for a press die.

Choi, Kye-Kwang; Lee, Yong-Shin

30

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

Microsoft Academic Search

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

Dunbing Tang; Benhe Gao

2007-01-01

31

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)

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.

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

2013-11-01

32

Effects of Metal Particles Decoration on n-Type Chalcogenides Processed by Open Die Pressing  

NASA Astrophysics Data System (ADS)

The effects of copper particles dispersed into Bi1.9Sb0.1Te2.85Se0.15 nanopowders and sintered by open die pressing (ODP) have been investigated. Submicrometric copper particles were obtained by decomposing copper acetate molecules dispersed into chalcogenides nanopowders. The acetate powders were decomposed during the sintering process at 390 °C obtaining a fine dispersion of copper particles with dimensions in the order of 500 nm. Contents up to 0.2 wt.% of copper were investigated. ODP, previously introduced as a forming process for sintering and texturing p-type (Bi0.2Sb0.8)2Te3 nanopowders, has been applied to n-type chalcogenide: the mixed alloy nanopowders and copper acetate were compacted inside a metallic protective shell and fast pressed between two heated plates, keeping the composite under load for sintering. ODP processing ensures complete consolidation of nanopowders and material texturing with the basal (00 l) planes of the hexagonal crystal cell oriented parallel to the plates. The X-ray diffraction pattern shows an orientation factor, f, obtained by the Lotgering method, up to 64 %. Thermoelectric performance of the samples was measured by the Harman method in the range of 20-170 °C. Figure of merit ( ZT) behavior with temperature was improved in copper-dispersed samples showing a shift of the maximum value at higher temperatures. This effect can be mainly associated with an improvement of electrical conductivity, due to the presence of the copper particles.

Fanciulli, C.; Codecasa, M.; Passaretti, F.; Vasilevskiy, D.

2014-06-01

33

46. DETAIL VIEW OF THE MORTAR BOXES, STAMP BATTERIES AND ...  

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

46. DETAIL VIEW OF THE MORTAR BOXES, STAMP BATTERIES AND AMALGAMATION TABLES. NOTE FULTON IRON WORKS, SAM FRANCISCO 1908 STAMPED INTO THE MORTAR BOX. ALSO NOTE THE DIES RESTING ON THE OUTSIDE OF THE MORTAR BOX BY THE SECOND STAMP BATTERY FROM THE CAMERA POSITION. - Standard Gold Mill, East of Bodie Creek, Northeast of Bodie, Bodie, Mono County, CA

34

Mechanical properties, microstructure and texture of single pass equal channel angular pressed 1050, 5083, 6082 and 7010 aluminum alloys with different dies  

Microsoft Academic Search

Four important commercial aluminum alloys, namely 1050, 5083, 6082 and 7010AA are processed through a single pass via two equal channel angular pressing (ECAP) dies with different geometries (die angles of 90° and 120°). Electron back scattered diffraction (EBSD) is applied on the flow plane of the processed samples. Large scans with a step size of 7?m for grain size

Ehab A. El-Danaf

2011-01-01

35

Synchronized time stamp support  

SciTech Connect

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 software.

Kowalkowski, J.

1994-02-16

36

Plate stamping of masterplates for the Tile-Cal hadronic calorimetric for ATLAS detector at CERN  

SciTech Connect

Various methods have been explored for the fabrication of the large trapezoidal plates used in the construction of the Tile-Cal hadronic calorimeter for ATLAS. The options include die stamping, laser cutting, waterjet cutting, plasma arc cutting, and a combination of machining and laser cutting. Very early in the program, the Argonne group began investigating the possibility of die stamping the master plates. At that time it was felt that two dies would be necessary to achieve the accuracy required. Quotations were received for dies for both the master and spacer plates. Concern was expressed by many members of the collaboration that due to the very precise tolerances required, die stamping, using standard dies, would not be adequate. Fine blanking techniques were felt to be adequate, but were cost prohibitive. Two methods were finally used for the initial cutting of prototype plates, laser cutting and die stamping. Only the die stamping, will be reviewed here.

Hill, N.F.; Petereit, E.; Wood, K.; Proudfoot, J.

1996-05-16

37

STS-8 postal Stamp envelope  

NASA Technical Reports Server (NTRS)

STS-8 postal Stamp envelope with Challenger insignia, USA eagle stamp, 25th NASA anniversary stamp. The envelope is stamped with various postmarks, one saying Kennedy Space Center, Fl., another saying 'Returned to earth, Edwards AFB, CA'.

1983-01-01

38

Tensile properties of an Al–11 mass%Si alloy at elevated temperatures processed by rotary-die equal-channel angular pressing  

Microsoft Academic Search

Tensile properties of a severely deformed Al–11mass%Si alloy processed from 4 to 32 passes by rotary-die equal-channel angular pressing (RD-ECAP) were investigated at elevated temperatures. Elongation to failure significantly increased with increasing the number of RD-ECAP passes at each test temperature. The sample pressed 32 passes exhibited 34% elongation to failure at 573K, which was five times higher than that

Aibin Ma; Makoto Takagi; Naobumi Saito; Hiroyuki Iwata; Yoshinori Nishida; Kazutaka Suzuki; Ichinori Shigematsu

2005-01-01

39

Stamp Lessons on Students.  

ERIC Educational Resources Information Center

A classroom stamp collection can be used to motivate students in social studies, language arts, science, art, and geography. Tips on how to obtain stamps and develop a curriculum that focuses on many subjects are offered. (DF)

Garbowsky, Maryanne M.; Raabe, Dennis D.

1985-01-01

40

The Dead Parrot and the Dying Swan: The Role of Metaphor Scenarios in UK Press Coverage of Avian Flu in the UK in 2005–2006  

Microsoft Academic Search

This article takes two events in the ongoing story of a predicted UK avian flu epidemic—“the dead parrot” (October 2005) and “the dying swan” (April 2006)—and examines the role and use of three interconnected metaphor scenarios (related to the notions of “journey,” “war,” and “house”) in the UK press coverage about avian influenza in 2005 and 2006. These represent fundamental

Nelya Koteyko; Brian Brown; Paul Crawford

2008-01-01

41

Microstructure of Al–Si–Mg alloy processed by rotary-die equal channel angular pressing  

Microsoft Academic Search

New rotary-die ECAP (RD-ECAP) was applied to a commercial Al–Si–Mg (AC4C) alloy to improve the ductility, and the microstructural developments and mechanical properties of ECAPed specimens were investigated. The as-cast Al alloy was used after machining to a cylindrical shape. ECAP was performed at 543, 603 and 673 K. The microstructure changes of samples were examined. The Vickers microhardness was

Jin-Chun Kim; Yoshinori Nishida; H Arima; Teiichi Ando

2003-01-01

42

Valuation method for effects of hot stamping process parameters on product properties using hot forming simulator  

Microsoft Academic Search

Hot stamping is one of the hot forming processes for manufacturing products of lightweight construction such as lightweight vehicles. Knowledge on the characteristics of the hot stamping process is significant in designing and optimizing the process conditions, dies and tools; however, until now, the characteristics of this process, such as the relationships between a product property and die temperature and

Katsuyoshi Ikeuchi; Jun Yanagimoto

2011-01-01

43

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

Microsoft Academic Search

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

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

2006-01-01

44

39 CFR 551.2 - Semipostal stamps.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Semipostal stamps. 551.2 Section 551.2 Postal Service...POSTAL SERVICE POSTAGE PROGRAMS SEMIPOSTAL STAMP PROGRAM § 551.2 Semipostal stamps. Semipostal stamps are stamps that are...

2010-07-01

45

3-D stamp forming of thermoplastic matrix composites  

Microsoft Academic Search

In this investigation a mould with hemispherical cavity and 80 kN hydraulic press, allowing variable stamping speeds, are employed for experimentally studying of the 3-D stamp forming process of continuous fiber reinforced thermoplastic laminates. In particular, glass fiber (GF) reinforced polyetherimide (PEI) woven fabric made of sheath surrounded, polymer powder impregnated fiber bundles manufactured by Enichem, Italy, is used. Pre-consolidated

M. Hou; K. Friedrich

1994-01-01

46

Impact toughness of an ultrafine-grained Al–11mass%Si alloy processed by rotary-die equal-channel angular pressing  

Microsoft Academic Search

By means of rotary-die equal-channel angular pressing (RD-ECAP) a brittle casting aluminum alloy (Al–11mass%Si alloy) was transformed into a tougher material. The absorbed energy of the alloy, as measured by Charpy impact testing, increased markedly with increasing RD-ECAP passes. The maximum value of over 10 J\\/cm2 was obtained in the sample processed by RD-ECAP for 32 passes at 623 K,

Aibin Ma; Kazutaka Suzuki; Yoshinori Nishida; Naobumi Saito; Ichinori Shigematsu; Makoto Takagi; Hiroyuki Iwata; Akira Watazu; Toru Imura

2005-01-01

47

Impact toughness of an ingot hypereutectic Al–23 mass% Si alloy improved by rotary-die equal-channel angular pressing  

Microsoft Academic Search

The impact toughness of a hypereutectic Al–23mass% Si alloy was improved by rotary-die equal-channel angular pressing (RD-ECAP). The alloy was successfully processed by RD-ECAP at high temperatures of 673K and 623K. The absorbed energy as measured by Charpy impact tests significantly increased with increasing the number of RD-ECAP passes, and finally reached 13.0kJ\\/m2 after 32 passes. This value is 18

Aibin Ma; Kazutaka Suzuki; Naobumi Saito; Yoshinori Nishida; Makoto Takagi; Ichinori Shigematsu; Hiroyuki Iwata

2005-01-01

48

Optical force stamping lithography.  

PubMed

Here we introduce a new paradigm of far-field optical lithography, optical force stamping lithography. The approach employs optical forces exerted by a spatially modulated light field on colloidal nanoparticles to rapidly stamp large arbitrary patterns comprised of single nanoparticles onto a substrate with a single-nanoparticle positioning accuracy well beyond the diffraction limit. Because the process is all-optical, the stamping pattern can be changed almost instantly and there is no constraint on the type of nanoparticle or substrates used. PMID:21992538

Nedev, Spas; Urban, Alexander S; Lutich, Andrey A; Feldmann, Jochen

2011-11-01

49

Integrated Stamping Simulation Using State Of The Art Techniques To Fulfill Quality Assessment Requirements  

SciTech Connect

The last few years have seen the use of stamping simulation evolve to the extent that it is now a mainstream activity; a core part of the press tool engineering process. Now, new requirements for the use of challenging materials like Dual phase / Complex phase steel, VHSS, and aluminum, together with more stringent quality expectations, and shorter development cycles, there is a need to assess the panel quality in a wider context, before committing to tool manufacture.The integrated approach from ESI Group allows early up-front feasibility assessment, geometry and process optimization, and detailed process validation all within one system. Rapid die design and quick forming simulation modules play an essential role in the early stages of the process. A seamless connection between simulation and geometry is a vital characteristic, with the accurate simulation being used to validate and fine tune the process in order to assess final component quality in unprecedented detail, utilizing some of the most accurate material models available today. The combination of the distributed memory processing (DMP) solver together with new cost effective cluster based compute servers provide a practical solution to the problems of 'one million element' model sizes, and more sophisticated modeling methodologies become realistic for the first time.It is no longer sufficient to merely focus on the draw die, forming simulation must now consider the entire die line up. Typically, around half of forming issues arise from the draw die, so the time has now come to address the other half as well{exclamation_point} This paper will discuss how the PAM-STAMP 2G{sup TM} integrated solution is successfully used to deliver a positive business impact, by providing virtual panel quality assessment, tolerance control, and springback compensation. The paper will also discuss how other forming processes can be accurately modeled using the new modules.

Ling, David; Lambriks, Marc; El Khaldi, Fouad [PARC D'AFFAIRES SILIC - 99 rue des Solets - 94513 Rungis cedex (France)

2005-08-05

50

Application of the fuzzy-based Taguchi method for the structural design of drawing dies  

Microsoft Academic Search

In the sheet metal stamping process for automobiles, the drawing process requires the greatest stamping force, and thus the\\u000a structure of the drawing dies is the thickest and heaviest among all stamping dies. This study describes how the fuzzy-based\\u000a Taguchi method can be applied to explore multi-objective optimization in the structural design of drawing dies. Using the\\u000a lower die of

Bor-Tsuen Lin; Chun-Chih Kuo

2011-01-01

51

Intelligent sheet stamping process using segment blankholder modules  

Microsoft Academic Search

A sheet forming simulator with a finely segmented blank holder for stamping process of non-circular parts was developed to confirm the effect of variable distributed blank holding pressure (BHP). The BHP was controlled through an intelligent press control system. The same evaluation functions for fracture and wrinkling as ones in the previous work were adopted for fuzzy inference of incremental

Tetsuya Yagami; Ken-ichi Manabe; Ming Yang; Hiroshi Koyama

2004-01-01

52

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...

2012-05-01

53

Effects of dust particles and layer properties on organic electronic devices fabricated by stamping  

NASA Astrophysics Data System (ADS)

The mechanical properties of organic semiconductor thin films are determined using nanoindentation. The measured mechanical properties are incorporated into finite element simulations of deformation that arise during cathode patterning of organic electronic devices by pressure stamping methods. Simulations show that dust particles interposed between the stamp and film surface affect the evolution of contact areas when silicon or compliant polydimethyl-siloxane stamp dies are employed. We also examine the effects of the transferred metal layer thickness and stamp bulk modulus. Experimental and modeling results are found to be in good agreement. The implications of the results are discussed for the fabrication of a range of organic electronic devices.

Cao, Yifang; Kim, Changsoon; Forrest, Stephen R.; Soboyejo, Wole

2005-08-01

54

Stamp formed muffler  

SciTech Connect

A muffler for mounting to at least one exhaust pipe and at least one tail pipe of a vehicle is described. The muffler comprises a pair of plates securely connected to each other in generally face to face relationship. Each of the plates is stamp formed to define an array of channels therebetween. The channels are configured to define at least one inlet tube and at least one outlet tube in communication with one another and connectable to the exhaust pipe and tail pipe respectively. The inlet and outlet tubes each include at least one array of perforations extending therethrough. The arrays of channels further define at least one tuning tube in communication with at least one of the inlet and outlet tubes. The muffler further comprises at least one stamp formed external shell securely mounted to the plates. The external shell is stamp formed to define: inlet and outlet openings surrounding and mounted to selected portions of the inlet and outlet tubes respectively, at least one chamber enclosing the arrays of perforations in the plates, and at least one stamp formed low frequency resonating chamber in communication with the tuning tube formed by the plates.

Harwood, J.

1987-10-20

55

Postal Rocket Stamps  

NASA Technical Reports Server (NTRS)

In the 19th Century, experiments in America, Europe, and elsewhere attempted to build postal rockets to deliver mail from one location to another. The idea was more novel than successful. Many stamps used in these early postal rockets have become collector's items.

2004-01-01

56

Chemistry on Stamps.  

ERIC Educational Resources Information Center

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),…

Schreck, James O.

1986-01-01

57

Stamp of Approval  

ERIC Educational Resources Information Center

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…

Meraw, Leonard J.

2007-01-01

58

Rapid thermal processing by stamping  

DOEpatents

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.

Stradins, Pauls; Wang, Qi

2013-03-05

59

An analysis of drawbead restraining force in the stamping process  

Microsoft Academic Search

A theoretical model based on the virtual work principle was proposed to calculate the restraining force produced by the drawbead located on a stamping die surface. In the theoretical model the deformation of the sheet metal drawn over the groove shoulder or bead is assumed to be subjected to bending, sliding and unbending processes, and only the sliding process is

Fuh-Kuo Chen; Pao-Ching Tszeng

1998-01-01

60

The investigation of die-pressing and sintering behavior of ITP CP-Ti and Ti-6Al-4V powders  

SciTech Connect

This paper investigated the die-pressing and sintering behavior of the low-cost CP-Ti and Ti-6Al- 4V powders made by the Armstrong Process . The Armstrong powders have an irregular coral like, dendritic morphology, with a dendrite size of approximately 2-5 m. As-received as well as milled powders were uniaxially pressed at designated pressures up to 690 MPa to form disk samples with different aspect ratios. In the studied pressure range, an empirical powder compaction equation was applied to linearize the green density pressure relationship, and powder compaction parameters were obtained. The Armstrong Ti-64 powder exhibited a significantly higher sinterability than the CP-Ti powder. This was explained to be due to the higher diffusivity of V at the sintering temperature. The Ti-64 samples with a green density of 71.0% increased to 99.6% after sintering at 1300oC for 1 hour. An ex-situ technique was used to track the powder morphology change before and after sintering.

Chen, Wei [ORNL; Yamamoto, Yukinori [ORNL; Peter, William H [ORNL; Clark, Michael B [ORNL; Nunn, Stephen D [ORNL; Kiggans, Jim [ORNL; Muth, Thomas R [ORNL; Blue, Craig A [ORNL; Williams, James C [Ohio State University; Fuller, Brian [International Titanium Powder; Akhtar, Kamal [International Titanium Powder

2012-01-01

61

Pokemon Trading Card Sequences Mark Stamp Austin E Stamp  

E-print Network

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

Stamp, Mark

62

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

Microsoft Academic Search

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

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

2011-01-01

63

Food Stamps Grow Urban Gardens  

Microsoft Academic Search

Plants and seeds can be purchased with SNAP (formerly Food Stamps, renamed Supplemental Nutrition Assistance Program, or SNAP in 2008,) but most current SNAP participants are unaware. Nearly four decades ago, in 1973, Alabama Senator James Allen championed an amendment to allow the purchase of food-producing plants and seeds with Food Stamps. The Senate passed the amendment after less than

Daniel Bowman Simon

2012-01-01

64

An unusual rubber stamp case.  

PubMed

Given a questioned document and a questioned pre-inked rubber stamp, comparisons of each can be made with a microscope or similar magnification device. If sufficient evidence exists, these questioned items can be linked even if the stamp was not used as it was originally designed. PMID:11908618

Moryan, Donald D

2002-03-01

65

27 CFR 479.162 - Stamps authorized.  

Code of Federal Regulations, 2010 CFR

...Firearms 3 2010-04-01 2010-04-01 false Stamps authorized. 479.162 Section 479.162 Alcohol...CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.162 Stamps authorized. Adhesive stamps of the $5 and...

2010-04-01

66

Applying STAMP in Accident Analysis  

NASA Technical Reports Server (NTRS)

Accident models play a critical role in accident investigation and analysis. Most traditional models are based on an underlying chain of events. These models, however, have serious limitations when used for complex, socio-technical systems. Previously, Leveson proposed a new accident model (STAMP) based on system theory. In STAMP, the basic concept is not an event but a constraint. This paper shows how STAMP can be applied to accident analysis using three different views or models of the accident process and proposes a notation for describing this process.

Leveson, Nancy; Daouk, Mirna; Dulac, Nicolas; Marais, Karen

2003-01-01

67

3.OA The Stamp Collection  

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: Masha had $120$ stamps. First, she gave her sister half of the stamps and then she used three to mail letters. How many stamps does Masha have left?...

2012-07-05

68

Thermomechanical coupled simulation of hot stamping components for process design  

Microsoft Academic Search

At present, hot stamping represents an innovative manufacturing process for forming of high strength steels, implying a sheet\\u000a at austenite temperature being rapidly cooled down and formed into a die at the same time (quenching). This forming process\\u000a is used for the manufacturing of automobile structural components with a strength of up to 1,500 MPa, thus enabling extensive\\u000a cost savings and

A. Erman Tekkaya; Hossein Karbasian; Werner Homberg; Matthias Kleiner

2007-01-01

69

Direct imprint of nanostructures in metals using porous anodic alumina stamps  

NASA Astrophysics Data System (ADS)

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.

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

2013-06-01

70

27 CFR 479.161 - National Firearms Act stamps.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false National Firearms Act stamps. 479.161 Section 479.161 Alcohol...CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.161 National Firearms Act stamps. “National Firearms Act” stamps...

2010-04-01

71

39 CFR 551.1 - Semipostal Stamp Program.  

Code of Federal Regulations, 2010 CFR

...2010-07-01 2010-07-01 false Semipostal Stamp Program. 551.1 Section 551.1 Postal...POSTAL SERVICE POSTAGE PROGRAMS SEMIPOSTAL STAMP PROGRAM § 551.1 Semipostal Stamp Program. The Semipostal Stamp...

2010-07-01

72

27 CFR 46.117 - Lost or destroyed stamps.  

Code of Federal Regulations, 2010 CFR

... 2010-04-01 false Lost or destroyed stamps. 46.117 Section 46.117 Alcohol...for Special (Occupational) Tax Special Tax Stamps § 46.117 Lost or destroyed stamps. If a special tax stamp has been lost...

2010-04-01

73

7 CFR 917.150 - Lot stamping.  

Code of Federal Regulations, 2011 CFR

... Lot stamping. Except when loaded directly into railway cars, exempted under § 917.143, or for peaches mailed directly...accordance with § 917.45: Provided, That pallets of returnable plastic containers shall have the lot stamp numbers affixed to...

2011-01-01

74

7 CFR 916.115 - Lot stamping.  

Code of Federal Regulations, 2011 CFR

... Lot stamping. Except when loaded directly into railway cars, exempted under § 916.110, or for nectarines mailed directly...accordance with § 916.55: Provided , That pallets of returnable plastic containers shall have the lot stamp numbers affixed to...

2011-01-01

75

7 CFR 917.150 - Lot stamping.  

Code of Federal Regulations, 2010 CFR

... Lot stamping. Except when loaded directly into railway cars, exempted under § 917.143, or for peaches mailed directly...accordance with § 917.45: Provided, That pallets of returnable plastic containers shall have the lot stamp numbers affixed to...

2010-01-01

76

7 CFR 916.115 - Lot stamping.  

Code of Federal Regulations, 2010 CFR

... Lot stamping. Except when loaded directly into railway cars, exempted under § 916.110, or for nectarines mailed directly...accordance with § 916.55: Provided , That pallets of returnable plastic containers shall have the lot stamp numbers affixed to...

2010-01-01

77

27 CFR 479.162 - Stamps authorized.  

Code of Federal Regulations, 2014 CFR

...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....

2014-04-01

78

27 CFR 479.162 - Stamps authorized.  

Code of Federal Regulations, 2011 CFR

...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....

2011-04-01

79

27 CFR 479.162 - Stamps authorized.  

Code of Federal Regulations, 2012 CFR

...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....

2012-04-01

80

27 CFR 479.162 - Stamps authorized.  

Code of Federal Regulations, 2013 CFR

...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....

2013-04-01

81

Food Stamps. Learning Packet No. 2.  

ERIC Educational Resources Information Center

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)

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

82

Investigation of micro\\/meso sheet soft punch stamping process – simulation and experiments  

Microsoft Academic Search

Different form traditional forming process, sheet soft punch process uses only a rigid die and the other tool set is a flexible medium, such as natural or synthetic rubbers. In this study, a kind of micro\\/meso sheet soft punch stamping process to fabricated micro channels is investigated via numerical simulations and experiments. Plane strain finite element analysis (FEA) models of

Linfa Peng; Peng Hu; Xinmin Lai; Deqing Mei; Jun Ni

2009-01-01

83

Diagnosis of sheet metal stamping processes based on thermal energy distribution  

Microsoft Academic Search

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

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

2005-01-01

84

Organic light-emitting diode micro patterned with a silicon convex stamp  

Microsoft Academic Search

We report on 30-?m-pitch organic light-emitting diode (OLED) stripes, whose cathode was patterned by lift-off method using a surface-unmodified silicon (Si) convex stamp. The OLED stripes consisted of ITO (120nm)–?-NPD (70nm)–Alq3 (70nm)–Al (30nm)–Au (approx. 1nm) layers on a glass wafer (12mm×12mm×0.5mm). A 0.7-?m-wide convex stamp was formed on an Si wafer by plasma etching in CF4, and it was pressed

Kazunori Hoshino; Takashi Hasegawa; Kiyoshi Matsumoto; Isao Shimoyama

2006-01-01

85

25 CFR 304.5 - Dies to identify tribe.  

Code of Federal Regulations, 2010 CFR

...304.5 Section 304.5 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR NAVAJO, PUEBLO, AND HOPI SILVER, USE OF GOVERNMENT MARK § 304.5 Dies to identify tribe. Dies are marked with name of tribe. A Navajo stamp will...

2010-04-01

86

Springback Prediction, Compensation and Correlation for Automotive Stamping  

SciTech Connect

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.

Xu Siguang; Zhao Kunmin; Lanker, Terry; Zhang, Jimmy; Wang, C.T. [General Motors Corp., Manufacturing Engineering, Die Center, 2000 Centerpoint, Pontiac, MI 48341 (United States)

2005-08-05

87

26 CFR 301.6805-1 - Redemption of stamps.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 2010-04-01 false Redemption of stamps. 301.6805-1 Section 301.6805-1...ADMINISTRATION General Provisions Relating to Stamps § 301.6805-1 Redemption of stamps. (a) Authorization. (1) Upon...

2010-04-01

88

27 CFR 46.132 - Credit for incorrect stamp.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Credit for incorrect stamp. 46.132 Section 46.132 Alcohol...Rules for Special (Occupational) Tax Stamps for Incorrect Period Or Incorrect Liability § 46.132 Credit for incorrect stamp. (a) General. The...

2010-04-01

89

26 CFR 301.6806-1 - Posting occupational tax stamps.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Posting occupational tax stamps. 301.6806-1 Section 301.6806-1...ADMINISTRATION General Provisions Relating to Stamps § 301.6806-1 Posting occupational tax stamps. For provisions relating to the...

2010-04-01

90

We're 4 Stamp Designs.  

ERIC Educational Resources Information Center

Describes an activity in which students create four-part stamp designs using a particular theme, such as sports, that work as a balanced composition, individually and collectively. Addresses how the students created their stamp designs and discusses the students' responses to the project. (CMK)

Manion, Smedley C.

2000-01-01

91

Volcanology by Courier: Science in Stamps.  

ERIC Educational Resources Information Center

Summarized are five activities involving collection of postage stamps picturing volcanoes or related scenes for use as part of or at the conclusion of the study of volcanoes. Activity topics include volcanic features, location of volcanoes, related land features where volcanoes are not located, and making one's own volcano stamps. (DS)

Glenn, William H.

1981-01-01

92

The Use of Postage Stamps To Teach Social Studies Topics.  

ERIC Educational Resources Information Center

Discusses how postage stamps can be used to teach social studies, including ideas for units on national culture, the history of technology, and peace education. Explains how teachers can obtain stamps and discusses stamp terminology. Considers classroom strategies and includes an appendix of Internet resources about postage stamps. (CMK)

Kirman, Joseph M.; Jackson, Chris

2000-01-01

93

27 CFR 479.163 - Reuse of stamps prohibited.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 2010-04-01 false Reuse of stamps prohibited. 479.163 Section 479.163...CERTAIN OTHER FIREARMS Distribution and Sale of Stamps § 479.163 Reuse of stamps prohibited. A stamp once affixed to one...

2010-04-01

94

Improving the Efficiency and Reliability of Digital Time-Stamping  

E-print Network

signatures, or to time-stamping itself, making the digital time-stamping process renewable. PartiallyImproving the Efficiency and Reliability of Digital Time-Stamping Dave Bayer Barnard College revealing their contents. Haber and Stornetta have proposed two schemes for digital time-stamping which rely

Bayer, David

95

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

SciTech Connect

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 quality may vary owing to a number of factors, such as the inhomogeneous of the workpice material, the loading error, the lubrication, and etc. Presently, few seem able to predict the quality variation, not to mention what contribute to the quality variation. As a result, trial-and-error is still needed in the shop floor, causing additional cost and time delay. This paper introduces a new approach to predict the product quality variation and identify the sensitive design / process parameters. The new approach is based on a combination of inverse Finite Element Modeling (FEM) and Monte Carlo Simulation (more specifically, the Latin Hypercube Sampling (LHS) approach). With an acceptable accuracy, the inverse FEM (also called one-step FEM) requires much less computation load than that of the usual incremental FEM and hence, can be used to predict the quality variations under various conditions. LHS is a statistical method, through which the sensitivity analysis can be carried out. The result of the sensitivity analysis has clear physical meaning and can be used to optimize the die design and / or the process design. Two simulation examples are presented including drawing a rectangular box and drawing a two-step rectangular box.

Yu Maolin; Du, R. [Department of automation and compute-aided engineering, Chinese University of Hong Kong, Shatin, N. T., Hong Kong (China)

2005-08-05

96

Integrated software package STAMP for minor planets  

NASA Technical Reports Server (NTRS)

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.

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

1992-01-01

97

van die Universiteit Stellenbosch Die kern van die beleid  

E-print Network

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

Geldenhuys, Jaco

98

Usage and Recall of the Food Stamp Office Resource Kit (FSORK) by Food Stamp Applicants in 4 California Counties  

ERIC Educational Resources Information Center

Objective: To evaluate recall and usage of the Food Stamp Office Resource Kit (FSORK), a set of nutrition education materials designed for use in food stamp offices. Design: Client intercept exit surveys, an environmental scan, and individual observations of clients in the food stamp office. Setting: Four food stamp offices in California.…

Ghirardelli, Alyssa; Linares, Amanda; Fong, Amy

2011-01-01

99

Direct drive digital servo press with high parallel control  

NASA Astrophysics Data System (ADS)

Direct drive digital servo press has been developed as the university-industry joint research and development since 1998. On the basis of this result, 4-axes direct drive digital servo press has been developed and in the market on April of 2002. This servo press is composed of 1 slide supported by 4 ball screws and each axis has linearscale measuring the position of each axis with high accuracy less than ?m order level. Each axis is controlled independently by servo motor and feedback system. This system can keep high level parallelism and high accuracy even with high eccentric load. Furthermore the 'full stroke full power' is obtained by using ball screws. Using these features, new various types of press forming and stamping have been obtained by development and production. The new stamping and forming methods are introduced and 'manufacturing' need strategy of press forming with high added value and also the future direction of press forming are also introduced.

Murata, Chikara; Yabe, Jun; Endou, Junichi; Hasegawa, Kiyoshi

2013-12-01

100

A case study of Vioxx using STAMP  

E-print Network

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 ...

Couturier, Matthieu (Matthieu Jean)

2010-01-01

101

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

102

Total area strain mapping improves total quality of stampings  

NASA Astrophysics Data System (ADS)

Sheet metal manufacturers are under constant and increasing pressure to improve and document quality, while reducing cost. Furthermore, OEMs are shifting responsibility for quality inspections to suppliers, adding extra burdens. Exciting, shapely product designs are placing greater demands on both quality assurance and development departments. Deep drawing and other new advanced forming methods push materials to their limits. There is a new stamping quality control tool available for easy, effective and reliable determination of shape, strains and thinning. Full-field optical vision systems, based on the well-known principles of circle grid analysis and photogrammetry, provide automated analysis and quantitative color maps for every square inch of complex parts. Quality results are displayed on a 3D computer model, using the actual measured dimensions of the real part, allowing it to be viewed from any angle. One of the key features of this system is a dynamic link between the forming limit diagram and the strain/thinning color map. When a point is clicked on either display, a second crosshair automatically highlights that same point on the other display, and a detail box presents all measured and calculated quantities. Critical points can be identified at a glance so that corrective action can be taken. Examples shown include before and after die optimization, and analysis of a 1.2 meter long B-pillar stamping.

Schmidt, Timothy; Tyson, John; Galanulis, Konstantin

2004-02-01

103

Pokemon Cards and the Shortest Common Superstring Mark Stamp Austin E Stamp  

E-print Network

Pok´emon Cards and the Shortest Common Superstring Mark Stamp Austin E Stamp June 12, 2003 Abstract Evidence is presented that certain sequences of Pok´emon cards are determined by selecting consecutive (SCS), i.e., the shortest string that contains each of the Pok´emon card sequences as a consecutive

Stamp, Mark

104

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

NASA Astrophysics Data System (ADS)

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.

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

2011-08-01

105

Mould filling analysis of aluminium extrusion dies  

Microsoft Academic Search

During trial pressings of an aluminium extrusion the shape of the first extrudate (nose piece) tells the correctors how to change the die geometry to obtain an acceptable product. In this paper the initial filling of an aluminium extrusion die is analyzed with the objective to predict the shape of the nose piece. The calculation domain is discretized using P1+P1

A. J. Koopman; H. J. M. Geijselaers; J. Huétink; F. Barlat; Y. H. Moon; M. G. Lee

2010-01-01

106

Influence of die material on pasta characteristics  

Microsoft Academic Search

Pasta dough, that is formed in the kneading machine and then driven by the extrusion screw towards the head of the press, is forced through a die whose characteristics strongly affect the appearance of the pasta surface. Traditional dies made entirely of bronze make the pasta surface rough, which helps to capture the sauce, whereas the Teflon insert gives the

Mara Lucisano; Maria Ambrogina Pagani; Manuela Mariotti; Daria Patrizia Locatelli

2008-01-01

107

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

SciTech Connect

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.

Chen, F.-K.; Chang, C.-K. [Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan (China)

2005-08-05

108

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

NASA Astrophysics Data System (ADS)

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.

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

2013-12-01

109

Nanoscale plasmonic stamp lithography on silicon.  

PubMed

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

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

2015-02-24

110

Recent Innovations in Hyperworks® Stamping Simulation Technology  

NASA Astrophysics Data System (ADS)

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.

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

2011-08-01

111

RANKL induces heterogeneous DC-STAMP(lo) and DC-STAMP(hi) osteoclast precursors of which the DC-STAMP(lo) precursors are the master fusogens.  

PubMed

Osteoclasts (OC) are multinucleated bone resorbing cells that form via RANKL-induced fusion of heterogeneous mononuclear OC precursors (OCP). Currently, there are no unique surface markers to distinguish these OCP populations, which are diagnostic for erosive and metabolic bone diseases using culture assays. Thus, we investigated expression of DC-STAMP, a surface receptor required for OCP fusion, during osteoclastogenesis in vitro using a novel monoclonal antibody (1A2). Immunoprecipitation-Western blot analysis of OCP membrane proteins detected 106 kDa dimeric and 53 kDa monomeric DC-STAMP in non-denaturing and denaturing conditions, respectively, with greater sensitivity versus rabbit anti-sera (KR104). 1A2 also detected 99.9% of undifferentiated monocytes as a single population by flow cytometry with a MFI 100-fold over background, while KR104 was not useful in this assay. Functionally, 1A2 inhibited OCP fusion in vitro. RANKL stimulation of OCP induced DC-STAMP(lo) and DC-STAMP(hi) cells, which mature into OC and mononuclear cells respectively as determined by fluorescent microscopy and TRAP assays. Addition of DC-STAMP(hi) cells to purified DC-STAMP(lo) cultures produced larger, more nucleated OC vs. pure DC-STAMP(lo) cultures. RT-qPCR analysis of these two populations showed that OC markers (Trap and Oc-stamp) and fusogenic gene expression (Cd9 and Cd47), were significantly increased in DC-STAMP(lo) vs. DC-STAMP(hi) cells. Collectively, these results demonstrate that DC-STAMP is expressed on OCP as a dimer, which is efficiently detected by 1A2 via flow cytometry. RANKL induces osteoclastogenesis by stimulating DC-STAMP internalization in some OCP, and these DC-STAMP(lo) cells display the "master fusogen" phenotype. In contrast, DC-STAMP(hi) OCP can only act as mononuclear donors. PMID:20039274

Mensah, Kofi A; Ritchlin, Christopher T; Schwarz, Edward M

2010-04-01

112

27 CFR 479.163 - Reuse of stamps prohibited.  

Code of Federal Regulations, 2012 CFR

...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...

2012-04-01

113

27 CFR 479.163 - Reuse of stamps prohibited.  

Code of Federal Regulations, 2014 CFR

...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...

2014-04-01

114

27 CFR 479.163 - Reuse of stamps prohibited.  

Code of Federal Regulations, 2013 CFR

...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...

2013-04-01

115

27 CFR 479.163 - Reuse of stamps prohibited.  

Code of Federal Regulations, 2011 CFR

...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...

2011-04-01

116

7 CFR 273.25 - Simplified Food Stamp Program.  

Code of Federal Regulations, 2012 CFR

...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...

2012-01-01

117

7 CFR 273.25 - Simplified Food Stamp Program.  

Code of Federal Regulations, 2013 CFR

...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...

2013-01-01

118

7 CFR 273.25 - Simplified Food Stamp Program.  

Code of Federal Regulations, 2014 CFR

...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...

2014-01-01

119

Comparison of extrusion strains produced by cosine and conical dies  

SciTech Connect

Visioplastic analysis is used to compare strain fields produced in cylindrical aluminum billets extruded at elevated temperature through axially symmetric dies that have either a cosine or a conical profile. The visioplastic method consists of computing strain rates from changes experienced in a flow function as a billet passes through the extrusion die. The flow function is constructed using a grid that is stamped on an axial plane of the billet before extrusion. After the partially extruded billet is removed from the die, numerical methods are used to determine the strain rates from the deformed grid. The state of strain over the extrusion region is computed using transformation and then integration of the strain rates. Results show that, unlike the conical die, the cosine die does not produce strains of reversed sign in the die entry region. The consequent benefits of using cosine dies for extrusion of powder metals are discussed.

Berghaus, D.G.; McCue, J.M. [Georgia Inst. of Tech., Atlanta, GA (United States); Peacock, H.B. [Dept. of Energy, Aiken, SC (United States). Savannah River Lab.

1995-02-01

120

An investigation of the blanking process of the quenchable boron alloyed steel 22MnB5 before and after hot stamping process  

Microsoft Academic Search

Recently, one of the most important issues in the automotive industry is lightweight construction. While maintaining safety standards, the fuel consumption can be decreased by reducing the weight of the vehicle. To manufacture lightweight vehicle components with high strength, hot stamping with quenchable boron steels is becoming more common in automotive industries. However, the high strength achieved in the press-hardened

Hyunwoo So; Dennis Faßmann; Hartmut Hoffmann; Roland Golle; Mirko Schaper

121

27 CFR 479.67 - Cancellation of stamp.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Cancellation of stamp. 479.67 Section 479.67 Alcohol...Firearm § 479.67 Cancellation of stamp. The person affixing to a Form 1 (Firearms) a “National Firearms Act” stamp shall cancel it by writing or...

2010-04-01

122

27 CFR 479.87 - Cancellation of stamp.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 2010-04-01 false Cancellation of stamp. 479.87 Section 479.87 Alcohol...Transfer of Firearm § 479.87 Cancellation of stamp. The method of cancellation of the stamp required by this subpart as prescribed in §...

2010-04-01

123

2014-15 SNAP (Food Stamps) Verification Worksheet  

E-print Network

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

Pantaleone, Jim

124

BOUNDED CONCURRENT TIME-STAMPING DANNY DOLEV AND NIR SHAVIT  

E-print Network

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

Lynch, Nancy

125

Finite element analysis of a tailored blanks stamping process  

Microsoft Academic Search

This paper describes the computer simulation methodology for applying the method of finite elements in the sheet stamping of a new type of sheet. Simulation of the cup stamping process by a punch of square section has been chosen for testing. The modelling of such a stamping process was carried out using a complete thermomechanical analysis including the modelling of

Z Zimniak; A Piela

2000-01-01

126

STAMP: Stanford Transactional Applications for Multi-Processing  

E-print Network

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

Kozyrakis, Christos

127

Hydrogel Stamping of Polyelectrolyte Multilayers for Directed Cell Growth  

Microsoft Academic Search

The authors have recently introduced the use of hydrogel stamp materials to pattern polyelectrolyte multilayer (PEM) films. It has been demonstrated that using a stamp equilibrated in either low or high pH can cause local swelling in these films, leading to patterns. It has also been shown that stamps soaked in high ionic strength salt solutions are able to locally

Nicole Zacharia; Chungyeon Cho

2011-01-01

128

Food Stamp Program Participation of Refugees and Immigrants  

Microsoft Academic Search

The Personal Responsibility and Work Opportunity Reconciliation Act (PRWORA) dramatically changed the availability of food stamps to immigrants, but not to refugees. However, refugee usage of food stamps in the post-reform era has declined more than usage of either other immigrants or native citizens. We investigate food stamp program participation of immigrants and refugees to ascertain if the resulting decline

Christopher R. Bollinger; Paul Hagstrom

2008-01-01

129

49 CFR 179.24 - Stamping.  

Code of Federal Regulations, 2012 CFR

...SPECIFICATIONS FOR TANK CARS General Design Requirements § 179.24 Stamping...back end left side (BL) body bolster webs so that each plate is readily accessible...Underframe/Stub Sill Type (UF/SS DESIGN): The design from Line 32 of...

2012-10-01

130

49 CFR 179.24 - Stamping.  

Code of Federal Regulations, 2013 CFR

...SPECIFICATIONS FOR TANK CARS General Design Requirements § 179.24 Stamping...back end left side (BL) body bolster webs so that each plate is readily accessible...Underframe/Stub Sill Type (UF/SS DESIGN): The design from Line 32 of...

2013-10-01

131

49 CFR 179.24 - Stamping.  

Code of Federal Regulations, 2014 CFR

...SPECIFICATIONS FOR TANK CARS General Design Requirements § 179.24 Stamping...back end left side (BL) body bolster webs so that each plate is readily accessible...Underframe/Stub Sill Type (UF/SS DESIGN): The design from Line 32 of...

2014-10-01

132

Making Sense of Oil Stamp Saving Schemes  

E-print Network

or part for one's oil bill. In this paper, we explore why this is. After ruling out high costs associated with more conventional savings vehicles (such as bank accounts) and the notion that oil stamps serve some purpose other than saving for heating oil...

Brutscher, Philipp-Bastian

2012-01-23

133

Site Tamper and Material Plow Tool - STAMP  

NASA Technical Reports Server (NTRS)

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.

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

2012-01-01

134

"Duck stamp" dollars reserve native prairie tracts  

USGS Publications Warehouse

Ducks and wetlands are inseparable in the prairies. Hunters know this, bird watchers know this, wildlife managers know this, and most importantly people who manage the croplands and rangelands know this. The 1,746 tracts of native prairie within these upland-wetland complexes known as Waterfowl Production Areas are not the only lands purchased with "duck stamp" dollars. Considerable acreages have also been purchased in central and southern parts of the United States to provide staging, resting, and wintering areas for waterfowl. Since 1934, when "duck stamps" were first sold, nearly 2.5 million acres of waterfowl habitats have been acquired or taken under easement within the United States with revenue from these sales. By purchasing "duck stamps", more than 2.2 million people provide over $16.5 million in annual revenue. It is certainly gratifying to know that some of the remaining native prairie remnants in the Northern Great Plains are being reserved for the future with "duck stamp" dollars.

Higgins, K.F.

1981-01-01

135

Site-specific stamping of graphene micro-patterns over large areas using flexible stamps  

Microsoft Academic Search

Site-specific stamping has the potential of becoming a low-cost, high-throughput method for depositing specific-shaped graphene micro-patterns over large areas on a wide variety of substrates. The use of an approach involving flexible stamps presented here represents an important advance towards reaching that potential. This approach entails lithographic creation (dry etching) of high-quality micro-pillar arrays of highly oriented pyrolytic graphite (HOPG)

Chun-Hu Chen; Kongara M Reddy; Nitin P Padture

2012-01-01

136

Computational Performance Evaluation of a Side Structure Considering Stamping Effects  

NASA Astrophysics Data System (ADS)

In this paper, the influence of the stamping effect is investigated in the performance analysis of a side structure. The analysis covers the performance evaluation such as crashworthiness and NVH. Stamping analyses are carried out for a center pillar, and then, numerical simulations are carried out in order to identify the stamping effect on the crashworthiness and the natural frequency. The result shows that the analysis considering the forming history leads to a different result from that without considering the stamping effect, which demonstrates that the design of auto-body should be carried out considering the stamping history for accurate assessment of various performances.

Kim, Se-Ho; Kim, Kee-Poong

137

Die Primzahlen  

Microsoft Academic Search

Ihren mystischen Nimbus haben die natürlichen Zahlen nach und nach verloren; aber niemals ist das Interesse von Mathematikern\\u000a und Laien an den Gesetzen der Zahlenwelt schwächer geworden. Es mag sein, daß Euklids Ruhm auf der geometrischen Deduktion seiner „Elemente“ beruht; bis heute haben die „Elemente“ jedenfalls den Unterricht\\u000a in der Geometrie entscheidend beeinflußt. Und doch war Euklids Geometrie im wesentlichen

Richard Courant; Herbert Robbins

138

Kiln for hot-pressing compacts in a continuous manner  

DOEpatents

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.

Reynolds, C.D Jr.

1983-08-08

139

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.

140

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.

141

A stamped PEDOT:PSS-silicon nanowire hybrid solar cell.  

PubMed

A novel stamped hybrid solar cell was proposed using the stamping transfer technique by stamping an active PEDOT:PSS thin layer onto the top of silicon nanowires (SiNWs). Compared to a bulk-type counterpart that fully embeds SiNWs inside PEDOT:PSS, an increase in the photovoltaic efficiency was observed by a factor of ?4.6, along with improvements in both electrical and optical responses for the stamped hybrid cell. Such improvements for hybrid cells was due to the formation of well-connected and linearly aligned active PEDOT:PSS channels at the top ends of the nanowires after the stamping process. These stamped channels facilitated not only to improve the charge transport, light absorption, but also to decrease the free carriers as well as exciton recombination losses for stamped hybrid solar cells. PMID:22433819

Moiz, Syed Abdul; Nahhas, Ahmed Muhammad; Um, Han-Don; Jee, Sang-Won; Cho, Hyung Koun; Kim, Sang-Woo; Lee, Jung-Ho

2012-04-13

142

Studies on the finite element simulation in sheet metal stamping processes  

NASA Astrophysics Data System (ADS)

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.

Huang, Ying

143

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.

144

Reading Like a Historian: Stamp Act  

NSDL National Science Digital Library

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.

Stanford History Education Group

2012-09-24

145

How can you use old stamps?  

NSDL National Science Digital Library

This problem from Figure This! helps students develop problem solving skills and algebraic thinking while practicing number operations. Students are challenged to use combinations of stamps of two different denominations to make a specific total. The "Try These" feature provides further challenges. The Answer page offers four different solution approaches. "Did You Know?" presents several related facts. The activity includes a page of print and Internet resources. Figure This! also provides information and support for families.

2004-01-01

146

On the Determination of the Blank Shape Contour for Thin Precision Parts Obtained by Stamping  

SciTech Connect

The present study deals with the 'automatic' determination of the initial blank shape contour for 3D thin metallic precision parts obtained by stamping, knowing the 3D CAD geometry of the final part (the desired product). The forming process can involve several steps presented in this paper that consists in applying a heuristic method of optimization to find out the initial blank shape of thin precision metallic part in order to obtain a final part, with a required 3D geometry (specified). The purpose of the present approach is to replace the experimental trial and error optimization method used currently, which is expensive and time consuming. The principle of the 'heuristic' optimization method is to first estimate the blank shape using the Inverse Approach, then to compensate the shape error calculated in each node of the blank contour. The 'heuristic' optimization loop is done using a precise incremental code (Abaqus Explicit or Stampack) and, the iterations loop is stopped when the shape errors are within some initially fixed tolerances. The method is tested in the case of a special stamping process where the parts are pressed in one or more steps using a manual press, without blank holder and by the mean of tools having complex shape. The sensitivities of the process parameters regarding the optimal solution are investigated.

Azaouzi, M. [ERMeP, Institut Superieur d'Ingenierie de la Conception (GIP-InSIC), 27, Rue d'Hellieule, 88100 Saint-Die-des-Vosges (France); Centre de Recherche Henri Tudor, Laboratoire de Technologies Industrielles, 70, Rue de Luxembourg, L-4221 Esch-sur-Alzette (Luxembourg); Delameziere, A. [ERMeP, Institut Superieur d'Ingenierie de la Conception (GIP-InSIC), 27, Rue d'Hellieule, 88100 Saint-Die-des-Vosges (France); Naceur, H.; Batoz, J. L. [Lab. Roberval, Universite de Technologie de Compiegne, BP 20529-60205, Compiegne (France); Sibaud, D. [Gottschol Alcuilux S.A, Z.I Op der Sang 18, L 9779 Eselborn (Luxembourg); Belouettar, S. [Centre de Recherche Henri Tudor, Laboratoire de Technologies Industrielles, 70, Rue de Luxembourg, L-4221 Esch-sur-Alzette (Luxembourg)

2007-05-17

147

Research of knowledge-based system for stamping process planning  

Microsoft Academic Search

This paper gives a brief introduction to establishing a knowledge-based system for intelligent stamping process planning.\\u000a Studies on the system’s framework, knowledge model and reasoning mode are introduced. Some key technologies such as the feasibility\\u000a of the stamping process, an optimal algorithm for blank layout, intelligent strip layout and force calculation are researched.\\u000a The efficiency of stamping process planning can

Yu Dequan; Zhang Rui; Chen Jun; Zhao Zhen

2006-01-01

148

Using STAMP to understand recent increases in malicious software activity  

E-print Network

My advisor, Professor Leveson has developed an accident modeling framework called STAMP (Systems Theoretic Accident Modeling and Processes.) Traditional accident models typically focus on component failure; in contrast, ...

Zipkin, David S

2005-01-01

149

Die Face Engineering based Springback Compensation Strategy and Implementation  

SciTech Connect

Springback or shape change has been one of the major challenges in sheet metal fabrication, particularly with increase application of high strength steel (HSS) and aluminum alloys in automotive stamping. Springback, an elastic material recovery after the unloading of stamping tools, causes variations and inconsistencies of final part dimensions. Minor or mild springback usually can be corrected in the re-strike process. Excessive springback must be corrected so the part will be produced within the given design tolerance and dimension. The commonly used Spring Forward approaches and shape compensations such as over-crown and over-bending are proven effective to alleviate excessive springback. To enhance these approaches, a new strategy of Die Face Engineering (DFE) based processing is proposed to quickly and easily to achieve the maximum allowable compensation using the under cut (or die lock) as the primary criteria. The implementation of the die face compensation through iterative FEA calculation, automatic surface mapping, projection and manual morphing are crucial to meet production environment requirements in terms of generating NC quality CAD surfaces of the compensated or morphed die face. In this paper, the strategy of the die face compensation with the consideration of the under cut criteria is presented. The implementation of various processes to enable user to perform the die face compensation task in a production environment is also discussed. Finally, two examples are shown to demonstrate the implementation of the proposed springback compensation scheme based on the combined CAE/CAD methodology.

Tang, Arthur; Lee Wing; He, Jeanne; Xu Jinbo; Liu Kesu; Chen Chinchun [Engineering Technology Associates, Inc., Troy, Michigan (United States)

2005-08-05

150

27 CFR 479.171 - Redemption of or allowance for stamps.  

Code of Federal Regulations, 2010 CFR

...false Redemption of or allowance for stamps. 479.171 Section 479.171 Alcohol...FIREARMS Redemption of or Allowance for Stamps or Refunds § 479.171 Redemption of or allowance for stamps. Where a National Firearms Act...

2010-04-01

151

27 CFR 46.116 - Issuance, distribution, and examination of special tax stamps.  

Code of Federal Regulations, 2010 CFR

...distribution, and examination of special tax stamps. 46.116 Section 46.116 ...Occupational) Tax Special Tax Stamps § 46.116 Issuance, distribution, and examination of special tax stamps. (a) Issuance of special tax...

2010-04-01

152

Stamp Collecting for Novices a Brief Booklist Top Choices for Beginners  

E-print Network

stamps: an illustrated encyclopedia of philatelic terms / / Wayne Youngblood. Youngblood, Wayne House Publishers, c2006. #12;Illustrated encyclopedia of stamp collecting / / Otto Hornung photographsStamp Collecting for Novices ­ a Brief Booklist Top Choices for Beginners Encyclopedia of United

Mathis, Wayne N.

153

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

Code of Federal Regulations, 2010 CFR

...promotional materials, trading stamps, or bonus goods. 101-25.103-4 Section...promotional materials, trading stamps, or bonus goods. (a) Agencies shall, through...promotional materials, trading stamps, or bonus goods, without reimbursement in...

2010-07-01

154

Characteristics of Food Stamp Households: Fiscal Year 2001.  

ERIC Educational Resources Information Center

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…

Rosso, Randy

155

2013-14 SNAP (Food Stamps) Verification Worksheet  

E-print Network

2013-14 SNAP (Food Stamps) Verification Worksheet Office of Student Financial Assistance P.O. Box.aid@uaa.alaska.edu G:\\Financial Aid\\Forms\\2013-14\\1314_SNAP_Verification_Worksheet.docx RRAAREQ Code: ASNAP Your Free Application for Federal Student Aid (FAFSA) indicates that a member of your household received Food Stamps/SNAP

Pantaleone, Jim

156

Fabrication of aligned microstructures with a single elastomeric stamp  

E-print Network

Fabrication of aligned microstructures with a single elastomeric stamp Joe Tien, Celeste M. Nelson 12, 2001 (received for review September 18, 2001) The fabrication of complex patterns of aligned that are stamped and those that are not (1, 2). Fabrication of complex, multilevel structures that contain more

Chen, Christopher S.

157

Stamping process design using FEA in conjunction with orthogonal regression  

Microsoft Academic Search

A process design technique is presented for the formability assessment of sheet metal stamping parts and feasibility analysis of process conditions. The proposed approach is based on numerical simulation of stamping processes by using explicit – incremental and implicit – iterative finite element techniques. The influence of the numeric model parameters are investigated with factor analysis and described with response

Mehmet Firat; Osman H. Mete; Umit Kocabicak; Murat Ozsoy

2010-01-01

158

Numerical simulation of protein stamping process driven by capillary force  

Microsoft Academic Search

Numerical simulations based on first-principle conservation laws of mass and momentum are performed to observe flow characteristics during the stamping process. The protein solution is transferred by a new design of microstamps with microchannels and printed on a bottom substrate. Furthermore, key physics of the stamping process and the control factors achieving uniform spot size can be identified and optimized

Shih-Chang Lin; Fangang Tseng; Ching-Chang Chieng

2002-01-01

159

Hidden Markov Model based fault diagnosis for stamping processes  

Microsoft Academic Search

Metal stamping process plays a very important role in the modern manufacturing industry. Owing to an ever-increasing demand for better quality at reduced cost, a practical on-line monitoring and diagnosis system is of much appeal. However, the stamping process is a complicated transient process involving a large number of variables. It is rather difficult to monitor and diagnose by classical

M. Ge; R. Du; Y. Xu

2004-01-01

160

Proposal model for automated stamping process using cylindrical parts  

Microsoft Academic Search

The generation of the stamping process is often based on the experiments and the knowledge of specialists in this field. However the development of a coherent system which able to generate a stamping process of the cylindrical parts that requires a great knowledge of the difficulties of sheet metal working processes. Such as wrinkling, fractures, geometrical defects, etc. In this

F. Abbassi; N. B. Yahia; A. Zghal

2004-01-01

161

Three-dimensional toolsforanalysis andconservation of ancient wooden stamps  

Microsoft Academic Search

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

R Seulin; F Nicolierb

2006-01-01

162

Hydrogel Stamping of Polyelectrolyte Multilayers for Directed Cell Growth  

NASA Astrophysics Data System (ADS)

The authors have recently introduced the use of hydrogel stamp materials to pattern polyelectrolyte multilayer (PEM) films. It has been demonstrated that using a stamp equilibrated in either low or high pH can cause local swelling in these films, leading to patterns. It has also been shown that stamps soaked in high ionic strength salt solutions are able to locally etch PEM films. This hydrogel stamping technique gives both lateral control of surface properties and depth control over the film's properties. This technique is a promising way to pattern chemical reactions within PEM, phase transformation, and physical properties such as film thickness, Young's modulus, and swelling. By using hydrogels for the stamp material, stamping becomes a process of continuously delivering aqueous reagent of interest to a film, instead of merely a single layer of material, as is the case when using hydrophobic stamp materials such as PDMS. While chemical modification of only the surface may be desirable in some cases, the hydrogel stamping technique is more versatile. By creating local variations in swelling, we are able to pattern mechanical stiffness, and in turn cell adhesion. We demonstrate the creation of gradients in mechanical stiffness which we are able to use to direct cell growth and adhesion on these films.

Zacharia, Nicole; Cho, Chungyeon

2011-03-01

163

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

E-print Network

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

Crews, Stephen

164

19. DETAIL OF STAMP BATTERY AUTOMATIC FEEDER, LOOKING EAST. THIS ...  

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

19. DETAIL OF STAMP BATTERY AUTOMATIC FEEDER, LOOKING EAST. THIS IS THE MIDDLE OF THREE FEEDERS, ONE FOR EACH STAMP BATTERY. THE CHUTE (UPPER RIGHT) INTRODUCED THE CRUSHED ORE FROM THE ORE BIN. FLOW WAS CONTROLLED BY A SLIDING DOOR ON THE UPPER LEVEL. - Skidoo Mine, Park Route 38 (Skidoo Road), Death Valley Junction, Inyo County, CA

165

16. OBLIQUE DETAIL VIEW OF STAMP BATTERIES AND APRONS, LOOKING ...  

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

16. OBLIQUE DETAIL VIEW OF STAMP BATTERIES AND APRONS, LOOKING SOUTHWEST. EACH BATTERY CONTAINS FIVE STAMPS. TWO OF THE THREE BATTERIES ARE SIDE BY SIDE IN FOREGROUND, WHILE THE THIRD BATTERY IS SEPARATE (LOWER RIGHT). STAIRWAY UP IS AT LEFT SIDE. SEE CA-290-43 (CT) FOR IDENTICAL COLOR TRANSPARENCY. - Skidoo Mine, Park Route 38 (Skidoo Road), Death Valley Junction, Inyo County, CA

166

Stamp Duties In Indian States: A Case for Reform  

Microsoft Academic Search

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

Arbind Modi; Patricia Annez; James Alm

2004-01-01

167

Die Wärmeleitfähigkeit von Alkoholen  

Microsoft Academic Search

Die Wärmeleitfähigkeit eines Mediums ist in der Nähe seiner Grenzflächen kleiner als im Innern, weil die Reflexionen der die Leitung bewirkenden Partikeln an den Randflächen eine Abnahme der mittleren freien Weglänge verursachen. Dies vermindert die Leitfähigkeit einer Probe meßbar, wenn die mittlere freie Weglänge mindestens einer wesentlich am Transport beteiligten Partikelart mit der Abmessung der Probe in der Flußrichtung vergleichbar

H. Poltz; R. Jugel

1968-01-01

168

Wege in die Zukunft  

NASA Astrophysics Data System (ADS)

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.

Kauermann, Göran; Mosler, Karl

169

Postal Service unveils new space stamps at KSC  

NASA Technical Reports Server (NTRS)

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.

1998-01-01

170

Postal Service unveils new space stamps at KSC  

NASA Technical Reports Server (NTRS)

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.

1998-01-01

171

Authentication, Time-Stamping and Digital Signatures  

NASA Technical Reports Server (NTRS)

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.

Levine, Judah

1996-01-01

172

Earthquake on a stamp: Emil Wiechert honored  

NASA Astrophysics Data System (ADS)

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.

Barckhausen, Udo; Rudloff, Alexander

2012-02-01

173

Sputtered protective coatings for die casting dies  

NASA Technical Reports Server (NTRS)

This investigation determined whether selected ion beam sputtered coatings on H-13 die steel would have the potential of improving the thermal fatigue behavior of the steel used as a die in aluminum die casting. The coatings were selected to test candidate insulators and metals capable of providing protection of the die surface. The studies indicate that 1 micrometer thick W and Pt coatings reduced the thermal fatigue more than any other coating tested and are candidates to be used on a die surface to increase die life.

Mirtich, M. J.; Nieh, C. Y.; Wallace, J. F.

1981-01-01

174

New stamp of Shuttle Columbia unveiled at Visitors Center.  

NASA Technical Reports Server (NTRS)

A new series of U.S. Postage stamps, The 1980s, is unveiled at the KSC Visitors Complex. Shown taking part in the 'First Day of Issue Ceremony' are (left to right) astronaut Richard Linnehan, U.S. Representative, 15th Congressional District, Dave Weldon, U.S. Postal Service District Manager Viki Brennan, Center Director Roy Bridges and President of the Visitor Complex Rick Abramson. Among the stamps issued is one of Space Shuttle Columbia, first launched in April 1981. This collection of stamps is the ninth in the Post Office's 'Celebrate the Century' commemorative series honoring the last 100 years of American history.

2000-01-01

175

New stamp of Shuttle Columbia unveiled at Visitors Center.  

NASA Technical Reports Server (NTRS)

A new series of U.S. Postage stamps, The 1980s, is unveiled at the KSC Visitors Complex. Taking part in the 'First Day of Issue Ceremony' were astronaut Richard Linnehan, U.S. Representative, 15th Congressional District, Dave Weldon, U.S. Postal Service District Manager Viki Brennan, Center Director Roy Bridges and President of the Visitor Complex Rick Abramson. Among the stamps issued is one of Space Shuttle Columbia (upper left corner), first launched in April 1981. This collection of stamps is the ninth in the Post Office's 'Celebrate the Century' commemorative series honoring the last 100 years of American history.

2000-01-01

176

New stamp of Shuttle Columbia unveiled at Visitors Center.  

NASA Technical Reports Server (NTRS)

One of a new series of U.S. Postage stamps, The 1980s, is unveiled at the KSC Visitors Complex. The stamp, shown here, is the Space Shuttle Columbia, first launched in April 1981. This collection of stamps is the ninth in the Post Office's 'Celebrate the Century' commemorative series honoring the last 100 years of American history. Taking part in the 'First Day of Issue Ceremony' were astronaut Richard Linnehan, U.S. Representative, 15th Congressional District, Dave Weldon, U.S. Postal Service District Manager Viki Brennan, Center Director Roy Bridges and President of the Visitor Complex Rick Abramson.

2000-01-01

177

New stamp of Shuttle Columbia unveiled at Visitors Center.  

NASA Technical Reports Server (NTRS)

One of a new series of U.S. Postage stamps, The 1980s, is unveiled at the KSC Visitors Complex. The stamp, shown here, is the Space Shuttle Columbia, first launched in April 1981. This collection of stamps is the ninth in the Post Office's 'Celebrate the Century' commemorative series honoring the last 100 years of American history. Taking part in the 'First Day of Issue Ceremony' are (left to right) astronaut Richard Linnehan, U.S. Representative, 15th Congressional District, Dave Weldon, U.S. Postal Service District Manager Viki Brennan, Center Director Roy Bridges and President of the Visitor Complex Rick Abramson.

2000-01-01

178

Beamte, die sich als \\  

Microsoft Academic Search

7 Sicherheitspolitik ist also keineswegs wertneutral. Dies betrifft sowohl das Ziel dieser Politik, als auch die Mittel, deren man sich zum Erreichen dieses Ziels bedient. Werden etwa territoriale Integrität und Souveränitäts- wahrung als Kernwerte nationaler Sicherheit angenommen, ent- spricht dies einer normativen politischen Ausrichtung. Im Vorder- grund steht damit die Bewahrung des bestehenden National- staats und nicht beispielsweise die Bildung

Walter Lippmann

179

Thermal contact resistance estimation at the blank\\/tool interface: experimental approach to simulate the blank cooling during the hot stamping process  

Microsoft Academic Search

In the present paper, an experimental device designed and developed to estimate the thermal contact resistance (R\\u000a \\u000a C\\u000a \\u000a ) at the blank\\/tool interface is presented along with the simulation chain used to validate the experimental results. The designed\\u000a stamping tool is composed of a die and a punch made in Z160CDV12 steel and presenting an omega shape. Sample and tools

Bakri Abdul Hay; Brahim Bourouga; Christine Dessain

2010-01-01

180

Apparatus for restraining and transporting dies  

DOEpatents

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.

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

1994-01-01

181

Energy Consumption of Die Casting Operations  

SciTech Connect

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.

Jerald Brevick; clark Mount-Campbell; Carroll Mobley

2004-03-15

182

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

183

Berthold Auerbach Die Kriegspfeife.  

E-print Network

den Schwarzwald zo- gen bald die �sterreicher mit ihren wei�en Wämm- sern, bald die Franzosen mit die Bayern, Würtember- ger, Hessen, in allerlei Gestalt. Der Schwarzwald war das allzeit offene Thor

Prodinger, Helmut

184

27 CFR 479.161 - National Firearms Act stamps.  

Code of Federal Regulations, 2012 CFR

...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...

2012-04-01

185

27 CFR 479.161 - National Firearms Act stamps.  

Code of Federal Regulations, 2014 CFR

...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...

2014-04-01

186

27 CFR 479.161 - National Firearms Act stamps.  

Code of Federal Regulations, 2011 CFR

...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...

2011-04-01

187

27 CFR 479.161 - National Firearms Act stamps.  

Code of Federal Regulations, 2013 CFR

...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...

2013-04-01

188

A cracked beam or plate transversely loaded by a stamp  

NASA Technical Reports Server (NTRS)

In this paper the problem of an infinite elastic beam or a plate containing a crack is considered. The medium is loaded transversely through a stamp which may be rigid or elastic. The problem is a coupled crack-contact problem which cannot be solved by treating the crack and contact problems separately and by using a superposition technique. First the Green's functions for the general case are obtained. Then the integral equations for a cracked infinite strip loaded by a frictionless stamp are obtained. With the question of fracture in mind, the primary interest in the paper has been in calculating the stress intensity factors. The results are given for a rigid flat stamp with sharp edges and for an elastic curved stamp. The effect of friction at the supports on the stress intensity factors is also studied and a numerical example is given.

Nied, H. F.; Erdogan, F.

1979-01-01

189

To Pluto from a First-Class Postage Stamp  

NASA Technical Reports Server (NTRS)

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.

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

1993-01-01

190

11. Detail of log stamp on ends of plank, near ...  

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

11. Detail of log stamp on ends of plank, near the Minnesota end of the bridge - Enloe Bridge No. 90021, Spanning Red River of North between Minnesota & North Dakota on County State Aid Highway 28, Wolverton, Wilkin County, MN

191

A defects detection system for the surfaces of stampings  

NASA Astrophysics Data System (ADS)

Detecting defects on the surfaces of stampings plays a critical role in the manufacturing process. Many methods have been proposed to detect and identify simple defects on stampings. However, these methods suffer from large system size, high cost, and low speed for inspection. This paper proposes a new visual system for detecting defects on the surfaces of stampings. A set of LED bar lights are used to illuminate the stamping surface from the four sides. This can ensure that the irradiation directions are parallel to the surface. Thus, it can enhance the imaging of the defects and punching edges in the vertical orientation of the surface, which facilitates the location of the defects such as scratch and pitting and the measurement of the punching sizes. Thereby, the defects can be classified using simple shape and dimension analysis. The proposed system is a part of the automated sorting system. Practical operations verify the effectiveness of the proposed system.

Chen, Baowen; Jiang, Jun; Cheng, Jun; Shen, Sanming

2013-12-01

192

Potential technologies based on stamped periodic nanoparticle array  

E-print Network

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. ...

Wang, Zongbin

2009-01-01

193

Detail of brace connection nut and stamped locknut, looking at ...  

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

Detail of brace connection nut and stamped locknut, looking at southwest tower leg. - Western Union Telegraph Company, Jennerstown Relay, Laurel Summit Road off U.S. 30, Laughlintown, Westmoreland County, PA

194

A STAMP model of the Überlingen aircraft collision accident  

E-print Network

STAMP is a method for evaluating accidents that is based on systems theory. It departs from traditional event chain models that tend to focus on human errors instead of the goals and motives that triggered the errors. The ...

Wong, Brian, 1982 Nov 11-

2004-01-01

195

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

196

Die Darwinsche Theorie und die Eukaryoten  

E-print Network

Geologe Charles Darwin 1859 in der Darwin Theorie. 6.1 Die Darwin-Theorie der Evolution Lebewesen kämpfen. Nach der Darwin-Theorie, wie sie heute formuliert wird, müssen sich mutierte Organismen einem höherer Farbkontrast zu einer besseren Wahrnehmung durch Fressfeinde führt. Die Darwin-Theorie erklärt die

Ulmschneider, Peter

197

Die großen Zeppeline: Die Geschichte des Luftschiffbaus  

NASA Astrophysics Data System (ADS)

Über die glanzvolle Zeit der Zeppeline sind viele Bücher erschienen, die vorwiegend den Einsatz der Luftschiffe in Frieden und Krieg schildern. Nur wenige wissen, dass die Baugeschichte der Zeppeline eine der faszinierendsten Phasen der modernen Technik ist. Peter Kleinheins hat dieses Geschehen sachkundig aufgearbeitet und zusammengestellt. Entstanden ist eine reich illustrierte Dokumentation in einer interessanten Mischform aus zeitgenössischen Berichten und hochwertigen Originalquellen.

Kleinheins, Peter; Meighörner, Wolfgang

198

Numerical simulation of protein stamping process driven by capillary force.  

PubMed

Numerical simulations based on first-principle conservation laws of mass and momentum are performed to observe flow characteristics during the stamping process. The protein solution is transferred by a new design of microstamps with microchannels and printed on a bottom substrate. Furthermore, key physics of the stamping process and the control factors achieving uniform spot size can be identified and optimized after these simulations. PMID:16696302

Lin, Shih-Chang; Tseng, Fangang; Chieng, Ching-Chang

2002-09-01

199

Tooling-integrated sensing systems for stamping process monitoring  

Microsoft Academic Search

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,

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

2009-01-01

200

Experimental study of heat transfer in hot stamping process  

Microsoft Academic Search

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

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

2009-01-01

201

Spacecraft Trajectory Analysis and Mission Planning Simulation (STAMPS) Software  

NASA Technical Reports Server (NTRS)

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.

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

202

43. OBLIQUE DETAIL VIEW OF STAMP BATTERIES AND APRONS, LOOKING ...  

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

43. OBLIQUE DETAIL VIEW OF STAMP BATTERIES AND APRONS, LOOKING SOUTHWEST. EACH BATTERY CONTAINS FIVE STAMPS. TWO OF THE THREE BATTERIES ARE SIDE BY SIDE IN FOREGROUND, WHILE THE THIRD BATTERY IS SEPARATE (LOWER RIGHT). STAIRWAY UP IS AT LEFT SIDE. SEE CA-290-16 FOR IDENTICAL B&W NEGATIVE. - Skidoo Mine, Park Route 38 (Skidoo Road), Death Valley Junction, Inyo County, CA

203

Bekommt die Erde Fieber?  

E-print Network

Bekommt die Erde Fieber? Y Warum zwei Grad mehr die Grenze sind Y Was ETH-Forscher gegen den gegen Klimawandel. 8 Grosseinsatz der Klimaforschung Wie ETH-Klimaforscher bei der Erde Fieber messen und was zwei Grad mehr für die Erde und die Schweiz bedeuten. 14 Fakten gegen Meinungen

Daraio, Chiara

204

Die Missionsziele Die Erde ist einem stndigen Beschuss mit energiereichen  

E-print Network

Die Missionsziele Die Erde ist einem ständigen Beschuss mit energiereichen Teilchen von der Sonne Magnetosphäre der Erde, die durch die ständige Wechselwirkung unseres Magnetfeldes mit dem Sonnenwind elektrisch leitendes Salzwasser über die Erd- oberfläche bewegen, erzeugen ebenfalls ein schwaches Magnetfeld

Sandoghdar, Vahid

205

Die drool and die drool theory  

NASA Astrophysics Data System (ADS)

When molten plastic is extruded from a die, it sometimes collects on the open face of the die. Known as die drool, this phenomenon costs plastics manufacturers by requiring die cleaning. This has been attributed to many causes, but none of these has led to an equation for the drool rate. In this work we provide an exact analytical solution for the drool rate, and we base this solution on a postulate of a cohesive slip layer near the die walls. We thus attribute die drool to cohesive failure within the fluid at an internal surface where the fluid slips on itself. We adimensionalize the drool rate with the production rate, and call this the build up ratio, BR. We provide an exact analytical solution for BR when the cohesive slip layer either sticks at the wall. We examine the slit geometry corresponding to sheet or film extrusion.

Schmalzer, A. M.; Giacomin, A. Jeffrey

2013-04-01

206

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

PubMed Central

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

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

2014-01-01

207

Coupled numerical simulation of hot stamping process and experimental verification  

NASA Astrophysics Data System (ADS)

Hot stamping process is a high non-linear process showing the effect on thermal, mechanical and metallurgical phenomena as they relate to each other. In order to carry out this coupled numerical simulation, fundamental thermal properties such as interfacial heat transfer coefficient and convection heat transfer coefficient as well as crucial mechanics properties were first investigated. Hot stamping tools with cooling system which has been optimized by genetic algorithm were employed in the simulation. The coupled numerical simulation to the whole hot stamping process was built with the ABAQUS/Explicit and FLUENT. Experiment was setup and the results of blank temperature and spring-back were compared with the results of coupled numerical simulation. The comparisons show that the simulation results of numerical model are consistent with experimental results.

Li, Ye; Ying, Liang; Hu, Ping; Shi, Dongyong; Zhao, Xi; Dai, Minghua

2013-05-01

208

Numerical Simulation of Textile Composite Stamping On Double Dome  

SciTech Connect

Stamping is one of the most effective ways to form textile composites in industry for providing high-strength, low-weight and cost-effective products. This paper presents a fully continuum mechanics-based approach for stamping simulation of textile fiber reinforced composites by using finite element (FE) method. A previously developed non-orthogonal constitutive model is used to represent the anisotropic mechanical behavior of textile composites under large deformation during stamping. Simulation are performed on a balanced plain weave composite with 0 deg./90 deg. and {+-}45 deg. as initial yarn orientation over a benchmark double dome device. Simulation results show good agreement with experimental output in terms of a number of parameters selected for comparison.

Xiongqi Peng [School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, 710072 (China); Department of Plasticity Engineering, Shanghai Jiao Tong University, Shanghai, 200030 (China); Zia Ur Rehman [School of Mechanical Engineering, Northwestern Polytechnical University, Xi'an, 710072 (China)

2011-05-04

209

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

210

75 FR 15740 - Valentine Tool and Stamping, Inc.: Norton, MA; Notice of Termination of Investigation  

Federal Register 2010, 2011, 2012, 2013, 2014

...TA-W-71,731] Valentine Tool and Stamping, Inc.: Norton, MA; Notice of Termination of Investigation Pursuant to Section...on behalf of workers of Valentine Tool and Stamping, Inc., Norton, Massachusetts. The petitioner has requested that the...

2010-03-30

211

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

Code of Federal Regulations, 2012 CFR

...2012-10-01 false Designation of yellow fever vaccination centers; Validation stamps...Provisions § 71.3 Designation of yellow fever vaccination centers; Validation stamps. (a) Designation of yellow fever vaccination centers. (1) The...

2012-10-01

212

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

Code of Federal Regulations, 2014 CFR

...2014-10-01 false Designation of yellow fever vaccination centers; Validation stamps...Provisions § 71.3 Designation of yellow fever vaccination centers; Validation stamps. (a) Designation of yellow fever vaccination centers. (1) The...

2014-10-01

213

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

Code of Federal Regulations, 2013 CFR

...2013-10-01 false Designation of yellow fever vaccination centers; Validation stamps...Provisions § 71.3 Designation of yellow fever vaccination centers; Validation stamps. (a) Designation of yellow fever vaccination centers. (1) The...

2013-10-01

214

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

Code of Federal Regulations, 2011 CFR

...2011-10-01 false Designation of yellow fever vaccination centers; Validation stamps...Provisions § 71.3 Designation of yellow fever vaccination centers; Validation stamps. (a) Designation of yellow fever vaccination centers. (1) The...

2011-10-01

215

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

Code of Federal Regulations, 2010 CFR

...2010-10-01 false Designation of yellow fever vaccination centers; Validation stamps...Provisions § 71.3 Designation of yellow fever vaccination centers; Validation stamps. (a) Designation of yellow fever vaccination centers. (1) The...

2010-10-01

216

OVERVIEW OF LOWER TRAM TERMINAL AND STAMP MILL SITE, LOOKING ...  

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

OVERVIEW OF LOWER TRAM TERMINAL AND STAMP MILL SITE, LOOKING NORTHWEST. THE AERIAL TRAMWAY BEGINS AT THE TERMINAL AND CONTINUES NORTH TO THE UPPER RIGHT. THE FIRST SUPPORT TOWER CAN BE SEEN. JUST BELOW THE WATER TANK IS A LOADING PLATFORM AND TRAM TRESTLE USED FOR THE TRANSPORT OF SUPPLIES THAT LEAD UP TO THE TRAM TERMINAL. ALL THREE LEVELS OF THE FORMER 20 STAMP MILL CAN BE SEEN AT CENTER. SEE CA-291-02 FOR IDENTICAL B&W NEGATIVE. - Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley Junction, Inyo County, CA

217

OVERVIEW OF LOWER TRAM TERMINAL AND STAMP MILL SITE, LOOKING ...  

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

OVERVIEW OF LOWER TRAM TERMINAL AND STAMP MILL SITE, LOOKING NORTHWEST. THE AERIAL TRAMWAY BEGINS AT THE TERMINAL AND CONTINUES NORTH TO THE UPPER RIGHT. THE FIRST SUPPORT TOWER CAN BE SEEN. JUST BELOW THE WATER TANK IS A LOADING PLATFORM AND TRAM TRESTLE USED FOR THE TRANSPORT OF SUPPLIES THAT LEAD UP TO THE TRAM TERMINAL. ALL THREE LEVELS OF THE FORMER 20 STAMP MILL CAN BE SEEN AT CENTER. SEE CA-291-46( CT) FOR IDENTICAL COLOR TRANSPARENCY. - Keane Wonder Mine, Park Route 4 (Daylight Pass Cutoff), Death Valley Junction, Inyo County, CA

218

Improved device performances in polymer light-emitting diodes using a stamp transfer printing process  

Microsoft Academic Search

The device performances of spin-coated and stamp transfer printed devices were compared. There was little difference of morphology between the spin-coated and stamp transfer printed devices. However, the stamp transfer printing process was better than the spin-coating process in terms of current density, light-emitting efficiency and lifetime. In particular, the lifetime of the stamp transfer printed device was doubled compared

Chul Woong Joo; Soon Ok Jeon; Kyoung Soo Yook; Jun Yeob Lee

2009-01-01

219

Packaged die heater  

DOEpatents

A heater for heating packaged die for burn-in and heat testing is described. The heater may be a ceramic-type heater with a metal filament. The heater may be incorporated into the integrated circuit package as an additional ceramic layer of the package, or may be an external heater placed in contact with the package to heat the die. Many different types of integrated circuit packages may be accommodated. The method provides increased energy efficiency for heating the die while reducing temperature stresses on testing equipment. The method allows the use of multiple heaters to heat die to different temperatures. Faulty die may be heated to weaken die attach material to facilitate removal of the die. The heater filament or a separate temperature thermistor located in the package may be used to accurately measure die temperature.

Spielberger, Richard; Ohme, Bruce Walker; Jensen, Ronald J.

2011-06-21

220

Displaced capillary dies  

DOEpatents

An asymmetrical shaped capillary die made exclusively of graphite is used to grow silicon ribbon which is capable of being made into solar cells that are more efficient than cells produced from ribbon made using a symmetrically shaped die.

Kalejs, Juris P. (Wellesley, MA); Chalmers, Bruce (Falmouth, MA); Surek, Thomas (Englewood, CO)

1982-01-01

221

Displaced capillary dies  

DOEpatents

An asymmetrical shaped capillary die made exclusively of graphite is used to grow silicon ribbon which is capable of being made into solar cells that are more efficient than cells produced from ribbon made using a symmetrically shaped die.

Kalejs, Juris P. (Wellesley, MA); Chalmers, Bruce (Falmouth, MA); Surek, Thomas (Englewood, CO)

1984-01-01

222

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

E-print Network

to prepare silicone rubber stamps, which are found to peel off the master easily even at wedge angles of 80 oxidized silicon wafers using silicone rubber stamps thathavebeencastfromlithographicallystructuredsiliconSubmicron Contact Printing on Silicon Using Stamp Pads T. Pompe, A. Fery, and S. Herminghaus* Max

Ludwig-Maximilians-Universität, München

223

Continuing The Rubber Stamp City Council Chicago City Council Report #6  

E-print Network

Continuing The Rubber Stamp City Council Chicago City Council Report #6 June 8, 2011 - February 13's tenure was characterized by a high degree of control over what was known as a "rubber stamp" council Council Wars and they also didn't want a City Council that would be a rubber stamp."1 Our report seeks

Illinois at Chicago, University of

224

27 CFR 479.37 - Certificates in lieu of stamps lost or destroyed.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Certificates in lieu of stamps lost or destroyed. 479.37 Section 479...Taxes § 479.37 Certificates in lieu of stamps lost or destroyed. When a special tax stamp has been lost or destroyed, such fact...

2010-04-01

225

27 CFR 46.106 - Receipt in lieu of stamp prohibited.  

Code of Federal Regulations, 2010 CFR

...2010-04-01 false Receipt in lieu of stamp prohibited. 46.106 Section 46...Special Tax § 46.106 Receipt in lieu of stamp prohibited. No receipt will be issued in lieu of issuance of a special tax stamp under § 46.116. A receipt may be...

2010-04-01

226

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

Code of Federal Regulations, 2010 CFR

...2010-04-01 false The special tax stamp, receipt for special (occupational...Taxes § 479.36 The special tax stamp, receipt for special (occupational...the taxpayer will be issued a special tax stamp as evidence of payment of the...

2010-04-01

227

27 CFR 46.118 - Certificate in lieu of lost or destroyed special tax stamp.  

Code of Federal Regulations, 2010 CFR

...in lieu of lost or destroyed special tax stamp. 46.118 Section 46.118 Alcohol...Special (Occupational) Tax Special Tax Stamps § 46.118 Certificate in lieu of lost or destroyed special tax stamp. The provisions of this subpart...

2010-04-01

228

27 CFR 70.311 - Authority for establishment, alteration, and distribution of stamps, marks, or labels.  

Code of Federal Regulations, 2010 CFR

...and distribution of stamps, marks, or labels. 70.311 Section... ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY...Provisions Relating to Stamps, Marks Or Labels § 70.311 Authority...and distribution of stamps, marks, or labels. The...

2010-04-01

229

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

E-print Network

FOOD STAMPS-SUPPLEMENTAL NUTRITION ASSISTANCE PROGRAM (SNAP) 2012-2013 Academic Year What is SNAP/we_______________________________________________ received Food-Stamps Supplemental Nutrition Assistance Program (SNAP) for year 2010 or 2011. Check the box/stepmother's Signature Date B. I certify that the payee above has received Food-Stamps Supplemental Nutrition Assistance

Rosen, Jay

230

A Numerical and Experimental Investigation into Hot Stamping of Boron Alloyed Heat Treated Steels  

Microsoft Academic Search

Hot stamping of steel sheets using water or nitrogen cooling media was studied on a laboratory scale. Sheets of grade 22MnB5 boron steels in three different thicknesses were investigated and the results of experimental hot stamping tests were considered. Microstructural analysis, linear and surface hardness profiling as well as tensile tests of formed samples were carried out. After hot stamping,

Malek Naderi; Vitoon Uthaisangsuk; Ulrich Prahl; Wolfgang Bleck

231

Transient dynamical analysis of strain signals in sheet metal stamping processes  

Microsoft Academic Search

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

Xiaoli Li; A. M. Bassiuny

2008-01-01

232

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

Microsoft Academic Search

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

Dunbing Tang; Benhe Gao

2007-01-01

233

The Application of Multi-layer Perception Networks in the Parameters Optimization of Stamping Forming Process  

Microsoft Academic Search

In the stamping process of high-strength steels, how to adjust each processing parameters to meet the needs of parts deformed is the key problem to be solved in the craft of stamping forming. The main work in this paper is to gain the optimum parameters by making use of neural network to fit experimental datum of stamping. In the experiment

Fengli Huang

2008-01-01

234

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

E-print Network

FORMABILITY INVESTIGATIONS FOR THE HOT STAMPING PROCESS Y. Dahan 1&2,* , Y. Chastel 1 , P. Duroux 2 to these constraints, the hot stamping process of quenchable steels allows to obtain thinner parts with higher, the process and some market trends are available in [2]. Figure 1. Crash relevant components hot stamped

Paris-Sud XI, Université de

235

The study on the fatigue FEM analysis considering the effect of stamping  

Microsoft Academic Search

The fatigue FEM analysis normally cannot inherit the stamping effects due to heterogeneous codes used. This paper proposes a database modification approach to integrate the stamping effects into the fatigue FEM prediction for an engine bracket in an accelerated rig test. Equal thickness shell, unequal thickness shell (including the stamping effects) and solid element are used to simulate the tubular

Wu-rong Wang; Guanlong Chen; Zhong-qin Lin

2009-01-01

236

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

E-print Network

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

Crews, Stephen

237

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

Federal Register 2010, 2011, 2012, 2013, 2014

...provisions of the Farm Security and Rural Investment...for the receipt of food stamps. Those provisions...program name from Food Stamp Program to...Branch, Program Development Division, FNS...final rule entitled, Food Stamp Program: Eligibility...Provisions of the Farm Security and Rural...

2010-05-04

238

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

E-print Network

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

Belogay, Eugene A.

239

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

Code of Federal Regulations, 2010 CFR

...2010-07-01 true Trading stamps or bonus goods received from contractors. 101-25...101-25.103-3 Trading stamps or bonus goods received from contractors. When...any method (such as trading stamps or bonus goods) by which the price of a...

2010-07-01

240

Die Coin Experiment  

NSDL National Science Digital Library

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.

Kyle Siegrist

241

Es lebe die Unverfrorenheit !\\  

Microsoft Academic Search

uber seine physikalische Interpr etation einer harmlos aus- sehenden, von ihn selbst zuvor aufgestellten Formel, die das spektrale Verhalten der sogenannten Warmestrahlung beschreibt. Maßgeblich durch das Eingreifen Albert Einsteins entwickelte sich daraus im folgenden Vierteljahrhundert eine fundamentale Krise der Physik, die dann in einer wissenschaftlichen Revolution großten Ausmaßes mundete: der Quantentheorie. Die Quantentheorie entwickelte sich von Anfang an diametral gegen

Domenico Giulini

242

A Time-Stamped Authoring Graph for Video Databases  

Microsoft Academic Search

This paper presents a time-stamped authoring graph, which is a new video description model and retrieval method based on fragmentary descriptions of video contents (i.e., the authors' impressions or feelings) and their relationships. It. can handle continuous video images better than existing description models, which tend to have problems in extracting parts of continuous video images and giving them precise

Kohji Zettsu; Kuniaki Uehara; Katsumi Tanaka; Nobuo Kimura

1997-01-01

243

STAMP: SMTP server Topological Analysis by Message headers Parsing  

E-print Network

to analyse SMTP servers overlay topology. STAMP builds a weighted and oriented graph from an email database headers and draws a weighted and oriented graph from an email database, an email log or just a simple, ...) and for metrology purposes. While several traceroute-like measurements projects try to map the Internet, to the best

Paris-Sud XI, Université de

244

7 CFR 273.25 - Simplified Food Stamp Program.  

Code of Federal Regulations, 2010 CFR

...ELIGIBLE HOUSEHOLDS § 273.25 Simplified Food Stamp Program...can have benefits reduced by 25 percent or more of the amount...10 to 24.99 percent, and by 25 percent or more, excluding...regular or 7-day expedited time frame, and screening for and...

2010-01-01

245

7 CFR 273.25 - Simplified Food Stamp Program.  

Code of Federal Regulations, 2011 CFR

...Program Alternatives § 273.25 Simplified Food Stamp Program...can have benefits reduced by 25 percent or more of the amount...10 to 24.99 percent, and by 25 percent or more, excluding...regular or 7-day expedited time frame, and screening for and...

2011-01-01

246

Improving the Accuracy of Stamping Analyses Including Springback Deformations  

NASA Astrophysics Data System (ADS)

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.

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

2013-02-01

247

Identifying Geographical Processes from Time-stamped Data  

E-print Network

Identifying Geographical Processes from Time-stamped Data Claudio Campelo, Brandon Bennett and at different times, which causes difficulties for humans to identify them. The conceptualisation of geographical features and their correlation with geographical phenomena may provide a hu- man like approach

Bennett, Brandon

248

Whom Shall We Put on the Postage Stamps?  

ERIC Educational Resources Information Center

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…

Boyle, Roger D.

2013-01-01

249

Micron and Nanometer Sized Contact Pattern Replication: Advanced Stamping  

E-print Network

Micron and Nanometer Sized Contact Pattern Replication: Advanced Stamping and Molding Kenneth R for new nanoscale designs and processing techniques. One of the thrust of my group is the development modification and reactive functionality. Our Nanocontact Molding (NCM) process and materials will be discussed

Carter, Kenneth

250

The Formability of Friction Stir Welds in Automotive Stamping Environments  

SciTech Connect

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 (TWBs) are hybrid sheet products composed of either different materials or different thickness sheets that are joined together, then subjected to a stamping operation to create a formed assembly. The strategy is employed generally to save weight and material costs in the formed assembly by placing higher strength or thicker sections only where needed. The forming or stamping process requires the joint to be severely deformed along with the parent sheets. Aluminum TWBs for automotive applications are particularly problematic because of the low formability of aluminum weld metal. Friction Stir Welding (FSW) is a process recently applied to Aluminum TWBs that has the potential to produce a higher quality weld. The current study presents data on the mechanical properties, formability, and FSW weld process parameter development for friction stir welded aluminum, Tailor Welded Blanks. Friction stir welded TWBs can be shown to have higher formability, higher ductility, and lower defect content than many competing joining processes, and they can be fabricated at speeds appropriate for automotive manufacturing.

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

2006-02-01

251

Optimization of stamping processes aiming at maximal process stability  

Microsoft Academic Search

In industrial practice the input parameters of a stamping system (material properties, friction conditions, machine settings, etc.) scatter considerably during production. In this paper, an approach for the determination of maximal stability of production process with regard to the uncontrollable scatter of the input parameters is described. The optimization procedure integrates process modeling and simple stochastic optimization by Monte Carlo

G. Gantar; K. Kuzman

2005-01-01

252

The Formability of Friction Stir Welds in Automotive Stamping Environments  

SciTech Connect

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 (TWBs) are hybrid sheet products composed of either different materials or different thickness sheets that are joined together, then subjected to a stamping operation to create a formed assembly. The strategy is employed generally to save weight and material costs in the formed assembly by placing higher strength or thicker sections only where needed. The forming or stamping process requires the joint to be severely deformed along with the parent sheets. Aluminum TWBs for automotive applications are particularly problematic because of the low formability of aluminum weld metal. Friction Stir Welding (FSW) is a process recently applied to Aluminum TWBs that has the potential to produce a higher quality weld. The current study presents data on the mechanical properties, formability, and FSW weld process parameter development for friction stir woined, aluminum, Tailor Welded Blanks. Friction stir welded TWBs can be shown to have higher formability, higher ductility, and lower defect content than many competing joining processes, and they can be fabricated at speeds appropriate for automotive manufacturing.

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

2005-04-01

253

The Post Office Unveils the E-Stamp.  

ERIC Educational Resources Information Center

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…

Peppriell, Barbara

1999-01-01

254

Friction stir spot welding of hot-stamped boron steel  

SciTech Connect

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.

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

2007-11-01

255

The Ph.D. Now Comes with Food Stamps  

ERIC Educational Resources Information Center

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…

Patton, Stacey

2012-01-01

256

Die Fenster zum Himmel  

NASA Astrophysics Data System (ADS)

Mittlerweile steht in Form von Adaptiven Optiken und Interferometern die nötige Technik zur Verfügung, um den Himmel im nahen und mittleren Infrarot mit hoher räumlicher Auflösung zu beobachten. Dadurch können in Sternentstehungsgebieten nicht nur junge Sterne und ihre oftmals vorhandenen Begleiter identifiziert, sondern auch die die jungen Sterne umgebenden Scheiben charakterisiert werden. Diese Scheiben sind von besonderem Interesse, da sie das Material bereitstellen aus dem sich die Sterne, aber potentiell auch Planeten formen. Hier soll gezeigt werden, auf welchen Prinzipien die hochauflösenden Beobachtungstechniken beruhen und wie sie zu einem besseren Verständnis der Sternentstehung beitragen. Es soll aber auch veranschaulicht werden, wie sich unser Blick ins Universum in den letzten Jahrhunderten dramatisch verändert hat.

Ratzka, Thorsten

2012-10-01

257

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

Microsoft Academic Search

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

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

2005-01-01

258

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

Microsoft Academic Search

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

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

2005-01-01

259

Overexpression of STAMP2 suppresses atherosclerosis and stabilizes plaques in diabetic mice  

PubMed Central

Our research aims to evaluate the function of the STAMP2 gene, an important trigger in insulin resistance (IR), and explore its role in macrophage apoptosis in diabetic atherosclerotic vulnerable plaques. The characteristics of diabetic mice were measured by serial metabolite and pathology tests. The level of STAMP2 was measured by RT-PCR and Western blot. The plaque area, lipid and collagen content of brachiocephalic artery plaques were measured by histopathological analyses, and the macrophage apoptosis was measured by TUNEL. Correlation of STAMP2/Akt signaling pathway and macrophage apoptosis was validated by Ad-STAMP2 transfection and STAMP2 siRNA inhibition. The diabetic mice showed typical features of IR, hyperglycaemia. Overexpression of STAMP2 ameliorated IR and decreased serum glucose level. In brachiocephalic lesions, lipid content, macrophage quantity and the vulnerability index were significantly decreased by overexpression of STAMP2. Moreover, the numbers of apoptotic cells and macrophages in lesions were both significantly decreased. In vitro, both mRNA and protein expressions of STAMP2 were increased under high glucose treatment. P-Akt was highly expressed and caspase-3 was decreased after overexpression of STAMP2. However, expression of p-Akt protein was decreased and caspase-3 was increased when STAMP2 was inhibited by siRNA. STAMP2 overexpression could exert a protective effect on diabetic atherosclerosis by reducing IR and diminishing macrophage apoptosis. PMID:24467451

Wang, Jia; Han, Lu; Wang, Zhi-hao; Ding, Wen-yuan; Shang, Yuan-yuan; Tang, Meng-xiong; Li, Wen-bo; Zhang, Yun; Zhang, Wei; Zhong, Ming

2014-01-01

260

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

NASA Astrophysics Data System (ADS)

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.

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

2013-12-01

261

Die singulation method  

DOEpatents

A method is disclosed for singulating die from a semiconductor substrate (e.g. a semiconductor-on-insulator substrate or a bulk silicon substrate) containing an oxide layer (e.g. silicon dioxide or a silicate glass) and one or more semiconductor layers (e.g. monocrystalline or polycrystalline silicon) located above the oxide layer. The method etches trenches through the substrate and through each semiconductor layer about the die being singulated, with the trenches being offset from each other around at least a part of the die so that the oxide layer between the trenches holds the substrate and die together. The trenches can be anisotropically etched using a Deep Reactive Ion Etching (DRIE) process. After the trenches are etched, the oxide layer between the trenches can be etched away with an HF etchant to singulate the die. A release fixture can be located near one side of the substrate to receive the singulated die.

Swiler, Thomas P.; Garcia, Ernest J.; Francis, Kathryn M.

2013-06-11

262

Die singulation method  

DOEpatents

A method is disclosed for singulating die from a semiconductor substrate (e.g. a semiconductor-on-insulator substrate or a bulk silicon substrate) containing an oxide layer (e.g. silicon dioxide or a silicate glass) and one or more semiconductor layers (e.g. monocrystalline or polycrystalline silicon) located above the oxide layer. The method etches trenches through the substrate and through each semiconductor layer about the die being singulated, with the trenches being offset from each other around at least a part of the die so that the oxide layer between the trenches holds the substrate and die together. The trenches can be anisotropically etched using a Deep Reactive Ion Etching (DRIE) process. After the trenches are etched, the oxide layer between the trenches can be etched away with a HF etchant to singulate the die. A release fixture can be located near one side of the substrate to receive the singulated die.

Swiler, Thomas P [Albuquerque, NM; Garcia, Ernest J [Albuquerque, NM; Francis, Kathryn M [Rio Rancho, NM

2014-01-07

263

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

NASA Astrophysics Data System (ADS)

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.

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

2010-06-01

264

Extrusion die and method  

DOEpatents

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.

Lipp, G. Daniel (Painted Post, NY)

1994-04-26

265

Multi-step stamping tools design method based on springback compensation  

NASA Astrophysics Data System (ADS)

The aim of the paper is to present a springback compensation method specific to the manufacturing by multi-step sheet metal forming process of high precision thin metallic parts (called blades) produced for tire industry. The blades (typical dimensions: 50×20×0.5 mm) are produced by a non-conventional stamping process in several successive forming operations using a manual press without blank-holder. To produce the blades within a severe fixed tolerance (±0.05 mm), springback compensation has to be performed during the design stage of the forming tools. Thus, a numerical method based on springback compensation has been developed which consists on iteratively comparing a target part shape with a finite element-simulated part shape following forming and springback. The displacement vectors at each node of the elastically-driven change of the deformed mesh are used to adjust the trial tools design until the desired part shape is achieved. The Finite Element Analysis (FEA) regarding the springback prediction and compensation has been conducted using Abaqusin conjunction with Pythonscripting interface.

Azaouzi, M.; Rauchs, G.; Belouettar, S.

2011-05-01

266

Optimization methods for complex sheet metal stamping computer aided engineering  

Microsoft Academic Search

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

Giuseppe Ingarao; Rosa Di Lorenzo

2010-01-01

267

Monitoring enzymatic degradation of pericellular matrices through SERS stamping  

NASA Astrophysics Data System (ADS)

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.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. Electronic supplementary information (ESI) available: Figure S1-S5 and Table S1 are available online. See DOI: 10.1039/c2nr30747b

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

2012-06-01

268

Expert system for simulation of metal sheet stamping  

Microsoft Academic Search

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

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

2009-01-01

269

KBE-based stamping process paths generated for automobile panels  

Microsoft Academic Search

As automobile body panels are one kind of sheet metal part with groups of free form surfaces, the process planning is more\\u000a complicated than common sheet metal stamping to implode effectively and practically. Based on KBE, new frameworks have been\\u000a presented as intelligent master model at the system level and as procedure model at the activity level. In accordance with

Jinqiao Zheng; Yilin Wang; Zhigang Li

2007-01-01

270

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

271

Charles Darwin University Press  

E-print Network

CDU Press Catalogue Charles Darwin University Press (CDU Press) (GLWHG E\\ -XGH &RQZD\\ 6WHS E\\ 6WHS Wildflowers Graham Brown CHARLES DARWIN UNIVERSITY PRESS #12;1 2 Welcome to Our Catalogue CDU Press is the academic publisher based on the Casuarina Campus of Charles Darwin University, Northern Territory

272

Estimation Model for Magnetic Properties of Stamped Electrical Steel Sheet  

NASA Astrophysics Data System (ADS)

Less deterioration in magnetic properties of electrical steel sheets in the process of stamping out iron-core are necessary in order to maintain its performance. First, the influence of plastic strain and stress on magnetic properties was studied by test pieces, in which plastic strain was added uniformly and residual stress was not induced. Because the influence of plastic strain was expressed by equivalent plastic strain, at each equivalent plastic strain state the influence of load stress was investigated. Secondly, elastic limit was determined about 60% of macroscopic yield point (MYP), and it was found to agree with stress limit inducing irreversible deterioration in magnetic properties. Therefore simulation models, where beyond elastic limit plastic deformation begins and magnetic properties are deteriorated steeply, are proposed. Besides considered points in the deformation analysis are strain-rate sensitivity of flow stress, anisotropy under deformation, and influence of stress triaxiality on fracture. Finally, proposed models have been shown to be valid, because magnetic properties of 5mm width rectangular sheets stamped out from non-oriented electrical steel sheet (35A250 JIS grade) can be estimated with good accuracy. It is concluded that the elastic limit must be taken into account in both stamping process simulation and magnetic field calculation.

Kashiwara, Yoshiyuki; Fujimura, Hiroshi; Okamura, Kazuo; Imanishi, Kenji; Yashiki, Hiroyoshi

273

Die Anwendung des Logit Modells auf die Daten der  

E-print Network

. . . . . . . . . . . . . . . . . . . . . . . . . . 4 4.1 Space Shuttle: Orbiter, externer Brennstofftank, Raketentriebwerke, Field JointsDie Anwendung des Logit Modells auf die Daten der Challenger-Katastrophe Bachelorarbeit Stefanie 15 4.1 Technische Aspekte der Challenger . . . . . . . . . . . . . . . . . . . . . . . 15 4.2 Die

274

Application of Raman spectroscopy in forensic investigation of questioned documents involving stamp inks.  

PubMed

Stamp pad inks from different manufacturers across India have been analyzed to investigate the feasibility of Raman scattering as a tool for forensic analysis of questioned documents involving stamp inks. Nine different stamping inks were analyzed by both Raman spectroscopic and HPTLC methods. The results demonstrate the effectiveness of these methods in classifying the investigated stamping inks based on their spectral pattern and HPTLC chromatogram. Raman scattering tool was able to determine the sequence of heterogeneous intersection strokes involving a blue stamp pad ink and other writing instruments, such as ballpoint pen ink (red and black), pencil and laser printer toner. However, this method was unable to resolve the exact sequencing for the intersection strokes involving investigated stamp ink and blue ballpoint ink or gel pen ink (all colors). PMID:23937943

Raza, Ali; Saha, Basudeb

2013-09-01

275

A stamp commemorating NASA's Mars Pathfinder mission is unveiled at KSC's Visitor Complex  

NASA Technical Reports Server (NTRS)

Nancy Warren, supervisor of stamp distribution for the U.S. Post Office, unveils the $3 commemorative Mars Pathfinder postage stamp at Kennedy Space Center's Visitor Complex on the second day of its issue. The stamp was first issued on Dec. 10 at the Jet Propulsion Laboratory, Pasadena, Calif. It depicts the Sojourner rover at rest on the Pathfinder spacecraft with a panoramic Martian view that is based on one of the first mission images sent back to Earth.

1997-01-01

276

Stamping process modeling of auto-body panel based on hierarchical polychromatic sets theory  

Microsoft Academic Search

Based on analysis of auto-body panelpsilas stamping process characteristics and feature classification, a stamping process information model of auto-body panel is established by using hierarchical polychromatic sets theory. The complex process information of auto-body panel can be described formally in the model. Based on the model, the system framework and flow of stamping CAPP for auto-body panel are presented.

Zhao Liping; Liu Chuanwei; Li Zongbin; Yao Yiyong

2008-01-01

277

Numerical Prediction of Microstructure and Mechanical Properties During the Hot Stamping Process  

Microsoft Academic Search

Numerical simulation and prediction of microstructures and mechanical properties of products is very important in product development of hot stamping parts. With this method we can easily design changes of hot stamping products' properties prior to the manufacturing stage and this offers noticeable time and cost savings. In the present work, the hot stamping process of a U-channel with 22MnB5

Dongbin Kan; Lizhong Liu; Ping Hu; Ning Ma; Guozhe Shen; Xiaoqiang Han; Liang Ying

2011-01-01

278

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

PubMed

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

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

2006-07-26

279

Minerals on postage stamps: A mix of art, history, economics and geography  

NASA Astrophysics Data System (ADS)

Most people would agree that minerals represent some of the most beautiful natural objects known to mankind, especially in the form of precious and semi-precious gemstones. It is hardly surprising, therefore, that they are often illustrated on stamps. Examples are the fine crystalline forms represented as coloured etchings in the French 1986 issue, and the stylized simplicity of the mineral stamps that were part of the Swiss Pro Patria series, issued annually between 1958 and 1961. I aim in this presentation to introduce the beautiful world of mineral illustrations on stamps. The talk cannot be comprehensive because of the very large number of minerals and stamps concerned, but it will introduce the range of minerals depicted on stamps, then look in some greater detail at several sets from France, Southern Africa and East Germany. Minerals become the subject of sets of stamps for many reasons. In many cases, it is part of an attempt by the particular national post office to depict the whole of the natural history of their country in stamp form - a statement of nationality and politics. The 1986 French issue was an example which followed sets of stamps that had already portrayed insects, flowers, trees and birds native to France. We also find that certain countries have produced several sets of stamps to mark the importance to their economy of mining particular minerals. Many African states depend upon minerals for much of their wealth and economic power, explaining why, for instance, Sierra Leone issued over 35 stamps on the subject of diamonds between 1965 and 1978, and why over 77% of mineral stamps come from countries with major mining interests. Countries with traditional links with the history of the study of geology and mining also produce mineral stamps. These are usually European countries with a long record of the study of the Earth, such as Germany and Switzerland. Curiously enough, though, despite its fine tradition of geological observation and research, the United Kingdom has never produced a stamp depicting rocks or minerals. It is often said that the study of stamps is a study of history, language, culture, art, geography and politics. If this is true for stamps in general, it is particularly true for minerals on stamps.

Glover, Paul

2010-05-01

280

Die andere Revolution  

NASA Astrophysics Data System (ADS)

War Kopernikus der größte Revolutionär des naturwissenschaftlichen Weltbildes? Seine Erkenntnisse waren der Beginn eines jahrhundertelangen Denkprozesses, welcher zur Einsicht führte, dass im Weltall die gleichen physikalischen Gesetze gelten wie auf der Erde.

Kippenhahn, Rudolf

2005-05-01

281

Über die Alkaptonurie  

Microsoft Academic Search

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.

Kurt Schreier; Hans Plückthun

1952-01-01

282

VIEW OF THE INSTALLATION OF AN EXTRUSION PRESS IN THE ...  

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

VIEW OF THE INSTALLATION OF AN EXTRUSION PRESS IN THE HIGH BAY AREA OF BUILDING 865. THE EXTRUSION PRESS WAS USED TO PRODUCE CYLINDRICAL BARS, HOLLOW TUBES, AND SHAPES WITH IRREGULAR CROSS-SECTIONS BY FORCING PREHEATED METAL THROUGH A DIE ORIFICE UNDER HIGH PRESSURE. (5/22/70) - Rocky Flats Plant, Metal Research & Development Laboratory, South of Central Avenue at south end of terminus of Ninth Avenue, Golden, Jefferson County, CO

283

Coin Die Experiment  

NSDL National Science Digital Library

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.

Kyle Siegrist

284

Reliability evaluation of a laser repaired die-casting die  

Microsoft Academic Search

The fatigue life of the die-casting dies depends on the heat checks, which are characterized by fine shallow cracks on the surface due to cyclic thermal stress. According to the recent study, laser-processing is effective to repair cracks and extend the life of dies. The purpose of this study is to develop a reliability evaluation method for laser repaired die

Richun Song; Satoshi Hanaki; Masato Yamashita; Hitoshi Uchida

2008-01-01

285

Whom shall we Put on the Postage Stamps?  

NASA Astrophysics Data System (ADS)

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 be part of it. We observe that notability means different things to different communities, and may arise by some form of nomination or emergence, and in the latter case case may not coincide with formal lists of prizewinners. We illustrate with two case studies of disciplinary communities being polled for views of who occupies their pantheon.

Boyle, Roger D.

2013-03-01

286

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

Code of Federal Regulations, 2010 CFR

...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...

2010-10-01

287

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

Code of Federal Regulations, 2012 CFR

...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...

2012-10-01

288

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

Code of Federal Regulations, 2011 CFR

...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...

2011-10-01

289

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

Code of Federal Regulations, 2014 CFR

...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...

2014-10-01

290

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

Code of Federal Regulations, 2013 CFR

...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...

2013-10-01

291

William Morris, the Kelmscott Press Chaucer, and the Princeton University Library Robert J. Milevski  

E-print Network

William Morris, the Kelmscott Press Chaucer, and the Princeton University Library Robert J. Milevski Independent Researcher Princeton, New Jersey * * * William Morris died in 1896 and the centenary of the Press and the lifelong career of William Morris as artist."3 He had experimented with and was sure

292

EFFECTS OF THE FOOD STAMP PROGRAM ON FOOD CONSUMPTION IN THE SOUTHERN UNITED STATES  

Microsoft Academic Search

The Food Stamp Program (FSP) began in 1939 in several ways. First, our analysis is more de- on a limited basis. In 1961, President Kennedy tailed in that it covers the expenditure pattern of created an experimental Food Stamp Program 15 food commodities. Indeed, in order to investi- that became nationwide after enactment of the gate how the FSP affects

Jean-Paul Chavas; M. L. Yeung

1982-01-01

293

STAMP2 increases oxidative stress and is critical for prostate cancer.  

PubMed

The six transmembrane protein of prostate 2 (STAMP2) is an androgen-regulated gene whose mRNA expression is increased in prostate cancer (PCa). Here, we show that STAMP2 protein expression is increased in human PCa compared with benign prostate that is also correlated with tumor grade and treatment response. We also show that STAMP2 significantly increased reactive oxygen species (ROS) in PCa cells through its iron reductase activity which also depleted NADPH levels. Knockdown of STAMP2 expression in PCa cells inhibited proliferation, colony formation, and anchorage-independent growth, and significantly increased apoptosis. Furthermore, STAMP2 effects were, at least in part, mediated by activating transcription factor 4 (ATF4), whose expression is regulated by ROS. Consistent with in vitro findings, silencing STAMP2 significantly inhibited PCa xenograft growth in mice. Finally, therapeutic silencing of STAMP2 by systemically administered nanoliposomal siRNA profoundly inhibited tumor growth in two established preclinical PCa models in mice. These data suggest that STAMP2 is required for PCa progression and thus may serve as a novel therapeutic target. PMID:25680860

Jin, Yang; Wang, Ling; Qu, Su; Sheng, Xia; Kristian, Alexandr; Mælandsmo, Gunhild M; Pällmann, Nora; Yuca, Erkan; Tekedereli, Ibrahim; Gorgulu, Kivanc; Alpay, Neslihan; Sood, Anil; Lopez-Berestein, Gabriel; Fazli, Ladan; Rennie, Paul; Risberg, Bjørn; Wæhre, Håkon; Danielsen, Håvard E; Ozpolat, Bulent; Saatcioglu, Fahri

2015-01-01

294

Texas Food Stamp Employment and Training/JOBS Conformance Demonstration: Process Evaluation Final Report.  

ERIC Educational Resources Information Center

A process evaluation was conducted of the Better Opportunities for New Directions (BOND) demonstration that tested the conformance between the Texas Food Stamp Employment and Training (E&T) and Job Opportunities and Basic Skills (JOBS) programs. JOBS policies and procedures were applied to eligible Food Stamp recipients; staff serving the two…

O'Shea, Daniel P.

295

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

Microsoft Academic Search

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

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

2007-01-01

296

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

Microsoft Academic Search

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

Cheryl A. Oberholser; Cynthia Reeves Tuttle

297

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

ERIC Educational Resources Information Center

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…

Gundersen, Craig; Kreider, Brent

2008-01-01

298

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

PubMed

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

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

2014-10-01

299

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

E-print Network

For first time since 2007, food stamp use drops in state, Palm Beach County March 13, 2013|By Donna in Palm Beach County fell in February, according to data from the Florida Department of Children from last year when the number of food stamp recipients in Palm Beach County jumped nearly 14 percent

Fernandez, Eduardo

300

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 (SNAP) during 2010 or 2011 calendar years. As part of the verification process, please provide(s)/stepparent household (listed on student FAFSA), received food stamps or Supplemental Nutrition Assistance Program (SNAP

301

Barriers to Participation in the Food Stamp Program Among Food Pantry Clients in Los Angeles  

Microsoft Academic Search

Substantial numbers of food pantry clients are eligible for food stamps but do not receive them. Background characteristics of 14317 food pantry users in Los Angeles were analyzed to provide information helpful in food stamp outreach programs. Ninety per- cent of food pantry users were living well below poverty level, 59% were Hispanic, and 44% were homeless. Only 15% of

Susan J. Algert; Michael Reibel; Marian J. Renvall

302

Patterning Barriers to Lateral Diffusion in Supported Lipid Bilayer Membranes by Blotting and Stamping  

E-print Network

and Stamping Jennifer S. Hovis and Steven G. Boxer* Department of Chemistry, Stanford University, Stanford be achieved by using a poly(dimethylsiloxane) (PDMS) stamp. Following slight lateral expansion into the bilayer-free region created by this blotting process, stable barriers to lateral diffusion are formed

Boxer, Steven G.

303

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

Microsoft Academic Search

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

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

2004-01-01

304

Development and implementation of stamping technology for especially large pipe elbows for nuclear power stations  

SciTech Connect

Results are given of the development and implementation of a stamping process for large pipe elbows for high-pressure service. Basic experimental data that indicate the technical possibilities of the process and description of the results of implementing the stamping process for pipe elbows of D /SUB e/ of 750 and 850 mm are also presented.

Romashko, N.I.; Bryukhanov, Yu.V.; Lebedev, V.A.; Moshnin, E.N.; Timokhin, V.S.

1984-01-01

305

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

Microsoft Academic Search

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

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

2007-01-01

306

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

Microsoft Academic Search

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

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

2007-01-01

307

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

E-print Network

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, fabricated in turn by photolithography. This process works well, but is not applicable to the preparation

Prentiss, Mara

308

Artist Robert McCall holds sheet of commemorative postage stamps  

NASA Technical Reports Server (NTRS)

Artist Robert McCall of Paradise Valley, Arizona, holds a sheet of commemorative postage stamps commemorating the Apollo 15 lunar landing mission. McCall was chosen by the U.S. Postal Service to design the eight-cent stamp which states: 'United States in Space - A Decade of Achievement'.

1971-01-01

309

STAMP2 increases oxidative stress and is critical for prostate cancer  

PubMed Central

The six transmembrane protein of prostate 2 (STAMP2) is an androgen-regulated gene whose mRNA expression is increased in prostate cancer (PCa). Here, we show that STAMP2 protein expression is increased in human PCa compared with benign prostate that is also correlated with tumor grade and treatment response. We also show that STAMP2 significantly increased reactive oxygen species (ROS) in PCa cells through its iron reductase activity which also depleted NADPH levels. Knockdown of STAMP2 expression in PCa cells inhibited proliferation, colony formation, and anchorage-independent growth, and significantly increased apoptosis. Furthermore, STAMP2 effects were, at least in part, mediated by activating transcription factor 4 (ATF4), whose expression is regulated by ROS. Consistent with in vitro findings, silencing STAMP2 significantly inhibited PCa xenograft growth in mice. Finally, therapeutic silencing of STAMP2 by systemically administered nanoliposomal siRNA profoundly inhibited tumor growth in two established preclinical PCa models in mice. These data suggest that STAMP2 is required for PCa progression and thus may serve as a novel therapeutic target. PMID:25680860

Jin, Yang; Wang, Ling; Qu, Su; Sheng, Xia; Kristian, Alexandr; Mælandsmo, Gunhild M; Pällmann, Nora; Yuca, Erkan; Tekedereli, Ibrahim; Gorgulu, Kivanc; Alpay, Neslihan; Sood, Anil; Lopez-Berestein, Gabriel; Fazli, Ladan; Rennie, Paul; Risberg, Bjørn; Wæhre, Håkon; Danielsen, Håvard E; Ozpolat, Bulent; Saatcioglu, Fahri

2015-01-01

310

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

E-print Network

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

Abubakr, Said

311

Stamp it out! Disciplining the image of Hinduism in a multicultural milieu  

Microsoft Academic Search

In November 2005 the UK Royal Mail's use of Hindu imagery in its Christmas stamp set was vigorously opposed by a range of organisations projected as representative of Hindus in the United Kingdom. The ‘Hindu stamp’ affair highlighted the speed with which appropriate institutional resources can now be mobilised to discipline the image of Hinduism as a religion in the

John Zavos

2008-01-01

312

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

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! Select the respective semester! Then, click here! #12;Select your favorite sport! #12;This is the sports stamp (Marke) you need. As a student you

Cengarle, María Victoria

313

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

PubMed

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

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

2005-12-01

314

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

NASA Astrophysics Data System (ADS)

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.

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

2013-05-01

315

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

NASA Astrophysics Data System (ADS)

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.

Huang, Sheng; Zhao, Yixi; He, Chunfeng

2013-12-01

316

A superconducting solenoid and press for permanent magnet fabrication.  

SciTech Connect

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.

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

2002-07-16

317

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

NASA Astrophysics Data System (ADS)

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 code Fast_Stamp include: fixed (imposed) initial blank, bending effects due to tool curvatures, blankholder restraining forces (including drawbeads). Considerations of bending and unbending during forming stages can improve the IA regarding stresses distribution. In this case satisfactory estimation of springback can result. Since 1996 we also developed "math based" optimization algorithms and strategies. The cost functions and constraints are mainly expressed to reduce or control the thickness changes, the localized necking, the wrinkling tendency, the springback after forming. The design variables are describing the shape of the blank, the additional (addendum) surfaces, the restraining forces due to drawbeads and the material properties such as anisotropy coefficient and hardening exponent. Optimization algorithms are mainly based on surface response techniques with moving least square approximation and SQP to find the optimum solution at each iteration. Selected results will be presented related to the design of additional surfaces.

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

2005-08-01

318

A Path-Independent Forming Limit Criterion for Stamping Simulations  

SciTech Connect

Forming Limit Diagram (FLD) has been proved to be a powerful tool for assessing necking failures in sheet metal forming analysis for majority of stamping operations over the last three decades. However, experimental evidence and theoretical analysis suggest that its applications are limited to linear or almost linear strain paths during its deformation history. Abrupt changes or even gradual deviations from linear strain-paths will shift forming limit curves from their original values, a situation that occurs in vast majority of sequential stamping operations such as where the drawing process is followed by flanging and re-strike processes. Various forming limit models have been put forward recently to provide remedies for the problem, noticeably stress-based and strain gradient-based forming limit criteria. This study presents an alternative path-independent forming limit criterion. Instead of traditional Forming Limit Diagrams (FLD) which are constructed in terms of major - minor principal strains throughout deformation history, the new criterion defines a critical effective strain {epsilon}-bar* as the limit strain for necking, and it is shown that {epsilon}-bar* can be expressed as a function of current strain rate state and material work hardening properties, without the need of explicitly considering strain-path effects. It is given by {epsilon}-bar* = f({beta}, k, n) where {beta} = (d{epsilon}{sub 2}/d{epsilon}{sub 1}) at current deformation state, and k and n are material strain hardening parameters if a power law is assumed. The analysis is built upon previous work by Storen and Rice [1975] and Zhu et al [2002] with the incorporation of anisotropic yield models such as Hill'48 for quadratic orthotropic yield and Hill'79 for non-quadratic orthotropic yield. Effects of anisotropic parameters such as R-values and exponent n-values on necking are investigated in detail for a variety of strain paths. Results predicted according to current analysis are compared against experimental data gathered from literature and good agreements are achieved. This provides a powerful validation for this approach.The new criterion retains all the advantages of the traditional FLDs since it's still constructed in the strain space. Its relationship with stress-based forming limit criteria is discussed. It is believed that the approach is especially suitable for production stamping CAE analysis since the strain rate state at any material point during forming deformation is readily available from FEA simulations. It can be easily embedded in forming simulation software or alternatively deployed as a post-processing function for forming simulations.

Zhu Xinhai [Livermore Software Technology Co., Livermore, CA 94550 (United States); Chappuis, Laurent; Xia, Z. Cedric [Ford Motor Company, Dearborn, MI 48121 (United States)

2005-08-05

319

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...

320

Rund um die Wirtschaftswissenschaftliche  

E-print Network

Studienleistungen, die an anderen deutschen Universitäten oder im Ausland erbracht wurden, wird durch das ECTS-System Internationale Büro. BWL in sieben Schwerpunkten: Accounting, Tax- ation and Capital Markets / Corporate Governance: Management and Corporate Control / Decision & Risk / Education, Labour Relations and Employment

Knüpfer, Christian

321

Dying to Play.  

ERIC Educational Resources Information Center

In August 1995, a young football player died as a result of heat exhaustion suffered on the first day of football practice in Arkansas. Spurred by this tragedy, the district made some changes that every school district with an athletic program should consider. These include using a heat-stress monitor; abandoning the practice of group physical…

Miller, John K.

1998-01-01

322

Die Stoffwechselsituation des Reizleitungssystems  

Microsoft Academic Search

Zusammenfassung Die spezifische Muskulatur des Reizleitungssystems unterscheidet sich u. a. von der Arbeitsmuskulatur durch ein vermindertes Vorkommen von Sarkosomen, eine schwächere Bernsteinsäuredehydrogenase-und Oxydasereaktion und einen geringeren Sauerstoffverbrauch. Wir schließen daraus auf einen stoffwechselmäßigen Unterschied zwischen den beiden Muskelarten und stellen zur Diskussion, ob das Reizleitungssystem relativ unabhängig von der Sauerstoffversorgung ist. Das Reizleitungssystem weist auch unter Thyroxinbelastung einen zäh festgehaltenen,

Th. H. Schiebler; M. Stark; R. Caesar

1956-01-01

323

When Somebody Dies  

MedlinePLUS

... after the body dies is often called the "soul" or "spirit." Some people believe the soul is the part of a human that loves, ... one really knows what happens to a person's soul after death. There are many different beliefs about ...

324

Die Kosmologie der Griechen.  

NASA Astrophysics Data System (ADS)

Contents: 1. Mythische Eier. 2. Thales-Welten. 3. "Alles ist voller Götter". 4. Griechische Astronomie. 5. "Rettung der Phänomene". 6. Aristotelische Kosmololgie. 7. Aristoteles-Welt und Platon-Welt. 8. Noch einmal: die Göttlichkeit der Welt. 9. Griechischer Idealismus.

Mittelstraß, J.

325

Archimedes, und die gestorten  

E-print Network

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

van Straten, Duco

326

HERAUSFORDERUNGEN FR DIE INFORMATIONSGESELLSCHAFT?  

E-print Network

. 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

Lutterbeck, Bernd

327

Dying at home  

PubMed Central

Abstract Objective To demonstrate that it is possible for a team of palliative care nurses in an urban centre to care for more than 50% of their terminally ill patients at home until they die, and that medical care delivered in the home is a determining factor in death at home versus death in a hospital. Design Analysis of place of death of terminally ill patients who died in 2012 and 2013 (N = 212) and who had been cared for by palliative care nurses, by type of medical care. Setting The centre local de services communautaires (CLSC) in Verdun, Que, an urban neighbourhood in southwest Montreal. Participants A total of 212 terminally ill patients. Main outcome measures Rate of deaths at home. Results Of the 212 patients cared for at home by palliative care nurses, 56.6% died at home; 62.6% received medical home care from CLSC physicians, compared with 5.0% who did not receive medical home care from any physician. Conclusion Combined with a straightforward restructuring of the nursing care delivered by CLSCs, development of medical services delivered in the home would enable the more than 50% of terminally ill patients in Quebec who are cared for by CLSCs to die at home—something that most of them wish for. PMID:25873716

Kiyanda, Brigitte Gagnon; Dechêne, Geneviève; Marchand, Robert

2015-01-01

328

Press Start  

NASA Astrophysics Data System (ADS)

This level sets the stage for the design philosophy called “Triadic Game Design” (TGD). This design philosophy can be summarized with the following sentence: it takes two to tango, but it takes three to design a meaningful game or a game with a purpose. Before the philosophy is further explained, this level will first delve into what is meant by a meaningful game or a game with a purpose. Many terms and definitions have seen the light and in this book I will specifically orient at digital games that aim to have an effect beyond the context of the game itself. Subsequently, a historical overview is given of the usage of games with a serious purpose which starts from the moment we human beings started to walk on our feet till our contemporary society. It turns out that we have been using games for all kinds of non-entertainment purposes for already quite a long time. With this introductory material in the back of our minds, I will explain the concept of TGD by means of a puzzle. After that, the protagonist of this book, the game Levee Patroller, is introduced. Based on the development of this game, the idea of TGD, which stresses to balance three different worlds, the worlds of Reality, Meaning, and Play, came into being. Interested? Then I suggest to quickly “press start!”

Harteveld, Casper

329

Dating of seals produced with stamp-pad ink using gas chromatography method.  

PubMed

Seals are often placed on important documents, and determining the date when a seal was affixed can be important to assess the authenticity of a document. In this study, thirty-seven different brands of stamp-pad inks and three different types of paper were used to make diachronic samples of the seals. The volatile components of stamp-pad ink were determined, and the stamp-pad ink was classified by gas chromatography with a flame ionization detector. Calibration curves were created to show the relationship between the content of volatile stamp-pad ink components and the age of stamp-pad ink entries stored under natural aging, UV-induced aging, and heating aging conditions. The experimental results showed that GC was useful in the analysis of stamp-pad ink and applicable for determining the relative age of stamp-pad ink entries in some cases where the seal was placed on the document within 3 months. PMID:24635021

Li, Biao

2014-09-01

330

Effect of stamp deformation on the quality of microcontact printing: theory and experiment.  

PubMed

Microcontact printing (microCP) is an effective way to generate micrometer- or submicrometer-sized patterns on a variety of substrates. However, the fidelity of the final pattern depends critically on the coupled phenomena of stamp deformation, fluid transfer between surfaces, and the ability of the ink to self-assemble on the substrate. In particular, stamp deformation can produce undesirable effects that limit the practice and precision of microCP. Experimental observations and comparison with theoretical predictions are presented here for three of the most undesirable consequences of stamp deformation: (1) roof collapse of low aspect ratio recesses, (2) buckling of high aspect ratio plates, and (3) lateral sticking of high aspect ratio plates. Stamp behavior was observed visually with an inverted optical microscope while load-displacement data were collected during compression and retraction of stamps. Additionally, a "robotic stamper" was used to deliver ink patterns in precise locations on substrates. These monomolecular ink patterns were then observed in high contrast using the surface potential scanning mode of an atomic force microscope. Theoretical models based on continuum mechanics were used to accurately predict both physical deformation of the stamp and the resultant inking patterns. The close agreement between these models and the experimental data presented clearly demonstrates the essential considerations one must weigh when designing stamp geometry, material, and loading conditions for optimal pattern fidelity. PMID:15248733

Sharp, Kenneth G; Blackman, Gregory S; Glassmaker, Nicholas J; Jagota, Anand; Hui, Chung-Yuen

2004-07-20

331

Exponential model of strength-hardness mechanical properties analysis and numerical prediction in hot stamping  

NASA Astrophysics Data System (ADS)

Hot stamping is an advanced sheet forming technology integrating traditional forming and quenching technique for high strength and hardness simultaneously in the process. This paper has investigated the mechanical properties evolution history of hot stamping boron steel 22MnB5 with different cooling rates under non-isothermal quenching process. It has been conducted for analyzing the effect of divided stage cooling influences on the mechanical properties of 22MnB5 by the martensite transformation temperature point Ms. A series of tests were conducted using the divided stage cooling tool in order to acquire the cooling rates hardness, mechanical strength of different quenching process. The hardness-cooling rate exponential model and mechanical strength-hardness-cooling rate exponential model were established by using the dimensional analysis method and the inverse method based on numerical analysis software MATLAB. The model has been applied to the prediction simulation in the self-developed software KMAS_HF to validate the hardness and strength prediction in hot stamping. The typical U-shape hot stamping experiment was investigated for the numerical simulation of non-isothermal quenching process. The evaluation result shows that the model has a good reliability and applicability for predicting the hot stamping mechanical properties, which can be used to guide the optimization of hot stamping process and the design of hot stamping tools.

Dai, M. H.; Ying, L.; Fan, Z. S.; Hu, P.; Shi, D. Y.; He, B.

2013-05-01

332

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

NASA Astrophysics Data System (ADS)

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.

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

2013-11-01

333

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

PubMed

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

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

2009-06-17

334

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.

335

Michigan State University Press  

E-print Network

..................................................................... 13 Labor and Industrial Revolution ........................................ 6 Lawns MSU PRESS TITLES American Literature ........................................................... 2 ............................................................................... 19 Hispanic American Studies ................................................ 8 History

Liu, Taosheng

336

Should assisted dying be lawful?  

PubMed

Calls for a change in the law to allow strictly controlled forms of assisted dying in the UK have resurfaced following a much-publicised storyline on the subject on the TV soap opera Coronation Street and the impending debate on Lord Falconer's Assisted Dying Bill in the House of Lords. This article reviews the current stance of the law on euthanasia and assisted dying and considers Lord Falconer's attempts to reform the law through the Assisted Dying Bill. PMID:24514111

Griffith, Richard

2014-02-01

337

The Global University Press  

ERIC Educational Resources Information Center

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…

Dougherty, Peter J.

2012-01-01

338

Der Islam und die Geschlechterfrage  

E-print Network

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

Steinhoff, Heinz-Jürgen

339

25 CFR 301.1 - Eligibility for use of Government stamp.  

Code of Federal Regulations, 2010 CFR

...301.1 Section 301.1 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR NAVAJO, PUEBLO, AND HOPI SILVER AND TURQUOISE PRODUCTS; STANDARDS § 301.1 Eligibility for use of Government stamp. Subject to the detailed...

2010-04-01

340

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

E-print Network

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 ...

Libert, Adam M. (Adam Marcus)

2014-01-01

341

Nanoscale organic transistors that use sourcedrain electrodes supported by high resolution rubber stamps  

E-print Network

Nanoscale organic transistors that use sourceÕdrain electrodes supported by high resolution rubber resolution rubber stamps bilayers of two different types of the elastomer polydimethylsiloxane 3,4 by casting

Rogers, John A.

342

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

Code of Federal Regulations, 2011 CFR

...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,...

2011-04-01

343

27 CFR 479.171 - Redemption of or allowance for stamps.  

Code of Federal Regulations, 2012 CFR

...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...

2012-04-01

344

27 CFR 479.171 - Redemption of or allowance for stamps.  

Code of Federal Regulations, 2014 CFR

...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...

2014-04-01

345

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

Code of Federal Regulations, 2013 CFR

...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,...

2013-04-01

346

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

Code of Federal Regulations, 2014 CFR

...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,...

2014-04-01

347

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

Code of Federal Regulations, 2012 CFR

...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,...

2012-04-01

348

27 CFR 479.171 - Redemption of or allowance for stamps.  

Code of Federal Regulations, 2011 CFR

...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...

2011-04-01

349

27 CFR 479.171 - Redemption of or allowance for stamps.  

Code of Federal Regulations, 2013 CFR

...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...

2013-04-01

350

26 CFR 301.7209-1 - Unauthorized use or sale of stamps.  

Code of Federal Regulations, 2010 CFR

...DEPARTMENT OF THE TREASURY (CONTINUED) PROCEDURE AND ADMINISTRATION PROCEDURE AND ADMINISTRATION Crimes, Other Offenses, and Forfeitures Crimes § 301.7209-1 Unauthorized use or sale of stamps. (a) Any person who buys,...

2010-04-01

351

27 CFR 70.332 - Unauthorized use or sale of stamps.  

Code of Federal Regulations, 2010 CFR

...CONTINUED) PROCEDURES AND PRACTICES PROCEDURE AND ADMINISTRATION Collection of Excise and Special (Occupational) Tax Crimes, Other Offenses and Forfeitures § 70.332 Unauthorized use or sale of stamps. Any person who buys,...

2010-04-01

352

Enhanced Mechanical Properties of a Hot-Stamped Advanced High-Strength Steel via Tempering Treatment  

NASA Astrophysics Data System (ADS)

The hot stamping process has an extensive range of applications due to its advantages over the traditionally used stamping techniques developed in the past. To enhance the mechanical properties of the indirectly hot-stamped parts, the quenching and partitioning (Q&P) process has been recently applied on boron-alloyed steel. In the current research, it was observed that the tempering treatment on the directly hot-stamped boron steel resulted in better mechanical properties and higher formability index compared with the reported results using the Q&P process. The nano-carbide formation and the dislocation annihilation during the tempering treatment were suggested as the evident reasons for the occurrence of the mentioned robust properties. The ease of the practical implementation of the tempering route together with the markedly enhanced mechanical properties of the tempered parts make the suggested method privileged. Additionally, the variations in the yield strength before and after tempering were quantitatively evaluated.

Naderi, M.; Abbasi, M.; Saeed-Akbari, A.

2013-04-01

353

31 CFR 500.410 - Currency, coins, and postage and other stamps.  

Code of Federal Regulations, 2010 CFR

...Currency, coins, 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 §...

2010-07-01

354

25 CFR 301.1 - Eligibility for use of Government stamp.  

Code of Federal Regulations, 2011 CFR

...Section 301.1 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR NAVAJO, PUEBLO, AND HOPI SILVER AND TURQUOISE PRODUCTS; STANDARDS § 301.1 Eligibility for use of Government stamp. Subject to the detailed requirements that...

2011-04-01

355

25 CFR 301.1 - Eligibility for use of Government stamp.  

Code of Federal Regulations, 2012 CFR

...Section 301.1 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR NAVAJO, PUEBLO, AND HOPI SILVER AND TURQUOISE PRODUCTS; STANDARDS § 301.1 Eligibility for use of Government stamp. Subject to the detailed requirements that...

2012-04-01

356

25 CFR 301.1 - Eligibility for use of Government stamp.  

Code of Federal Regulations, 2013 CFR

...Section 301.1 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR NAVAJO, PUEBLO, AND HOPI SILVER AND TURQUOISE PRODUCTS; STANDARDS § 301.1 Eligibility for use of Government stamp. Subject to the detailed requirements that...

2013-04-01

357

25 CFR 301.1 - Eligibility for use of Government stamp.  

Code of Federal Regulations, 2014 CFR

...Section 301.1 Indians INDIAN ARTS AND CRAFTS BOARD, DEPARTMENT OF THE INTERIOR NAVAJO, PUEBLO, AND HOPI SILVER AND TURQUOISE PRODUCTS; STANDARDS § 301.1 Eligibility for use of Government stamp. Subject to the detailed requirements that...

2014-04-01

358

77 FR 24177 - Approval for Manufacturing Authority; Foreign-Trade Zone 177; Hoosier Stamping & Mfg. Corp...  

Federal Register 2010, 2011, 2012, 2013, 2014

...Approval for Manufacturing Authority; Foreign-Trade Zone 177; Hoosier Stamping & Mfg. Corp. (Wheel Assemblies and Accessories); Chandler, IN Pursuant to its authority under the Foreign-Trade Zones Act of June 18, 1934, as amended (19...

2012-04-23

359

Quantitative characterizations of a nanopatterned bonded wafer: force determination for nanoimprint lithography stamp removal.  

PubMed

The nanoimprint lithography process consists of two mechanical steps: molding and stamp removal. While many publications dealing with anti-sticking layer properties or the understanding of polymer flow during imprinting have recently been published, only a few studies have been carried out to deeply characterize the demolding step. Regarding the small amount of theoretical work dedicated to this issue, in this paper both experimental and first theoretical approaches are proposed to characterize the demolding process in a peeling scheme. Full 200 mm stamp and imprinted wafers were used to identify the experimental limitation of such a full wafer peeling demolding scheme. A rectangular stamp and substrate samples with or without nanoscale features combined with an augmented beam theory are proposed to extract quantitative data for the required demolding force as well as the friction stress along the feature sidewall. Therefore both adhesion and friction forces were characterized on single stamp structures. PMID:21817726

Landis, S; Chaix, N; Gourgon, C; Leveder, T

2008-03-26

360

Micro-patterned cell-sheets fabricated with stamping-force-controlled micro-contact printing.  

PubMed

Cell-sheet-engineering based regenerative medicine is successfully applied to clinical studies, though cell sheets contain uniformly distributed cells. For the further application to complex tissues/organs, cell sheets with a multi-cellular pattern were highly demanded. Micro-contact printing is a quite useful technique for patterning proteins contained in extracellular matrix (ECM). Because ECM is a kind of cellular adherent molecules, ECM-patterned cell culture surface is capable of aligning cells on the pattern of ECM. However, a manual printing is difficult, because a stamp made from polydimethylsiloxane (PDMS) is easily deformed, and a printed pattern is also crushed. This study focused on the deformability of PDMS stamp and discussed an appropriate stamping force in micro-contact printing. Considering in availability in a medical or biological laboratory, a method for assessing the stamp deformability was developed by using stiffness measurement with a general microscope. An automated stamping system composed of a load cell and an automated actuator was prepared and allowed to improve the quality of stamped pattern by controlling an appropriate stamping force of 0.1 N. Using the system and the control of appropriate stamping force, the pattern of 8-mm-diameter 80-?m-stripe fibronectin was fabricated on the surface of temperature-responsive cell culture dish. After cell-seeding and cell culture, a co-culture system with the micro-pattern of both fibroblasts and endothelial cells was completed. Furthermore, by reducing temperature to 20 °C, the co-cultured cell sheet with the micro-pattern was successfully harvested. As a result, the method would not only provide a high-quality ECM pattern but also a breakthrough technique to fabricate multi-cellular-patterned cell sheets for the next generation of regenerative medicine and tissue engineering. PMID:25239040

Tanaka, Nobuyuki; Ota, Hiroki; Fukumori, Kazuhiro; Miyake, Jun; Yamato, Masayuki; Okano, Teruo

2014-12-01

361

Celebrating a Nation’s heritage on music stamps: Constructing an international community  

Microsoft Academic Search

Stamps convey important visible messages about a state’s heritage and worldview. They are images or official visible products\\u000a seen by those living within the state’s borders and those beyond. They also can be considered as “imagined communities,” as\\u000a like festivals, holidays, or WWW pages, they represent attachments to and images of place. We investigate stamps as elements\\u000a of visual culture

Kate Covington; Stanley D. Brunn

2006-01-01

362

A novel solution-stamping process for preparation of a highly conductive aluminum thin film.  

PubMed

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

Lee, Hye Moon; Choi, Si-Young; Kim, Kyung Tae; Yun, Jung-Yeul; Jung, Dae Soo; Park, Seung Bin; Park, Jongwook

2011-12-01

363

Watching the Clocks: The Role of Food Stamp Recertification and TANF Time Limits in Caseload Dynamics  

Microsoft Academic Search

We use administrative data to examine how ‘‘clock’’ policies—program time limits and recurring deadlines for confirming eligibility—affected participation in South Carolina’s TANF and Food Stamp Programs from 1996-2003. South Carolina’s TANF program limits most families to two years of benefits in any ten-year period; so, recipients began exhausting their eligibility as early as 1998. The state’s Food Stamp Program sets

David C. Ribar; Marilyn Edelhoch; Qiduan Liu

2008-01-01

364

Nanotransfer Printing Using Plasma Etched Silicon Stamps and Mediated by In-Situ Deposited Fluoropolyme  

SciTech Connect

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.

Bhandari, Deepak [ORNL; Kravchenko, Ivan I [ORNL; Lavrik, Nickolay V [ORNL; Sepaniak, Michael J [ORNL

2011-01-01

365

A Fully Automated and Robust Method to Incorporate Stamping Data in Crash, NVH and Durability Analysis  

NASA Astrophysics Data System (ADS)

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.

Palaniswamy, Hariharasudhan; Kanthadai, Narayan; Roy, Subir; Beauchesne, Erwan

2011-08-01

366

1 The birth of the MIT Press The MIT Press  

E-print Network

1 The birth of the MIT Press The MIT Press celebrating 50 years #12;3 The birth of the MIT Press birth of the MIT Press #12;3the birth of the MIT Press Like its extraordinary home institution, the MIT with some memory intact at the time when the Institute gave birth to it. A look at correspondence

Polz, Martin

367

Rep. George Brown dies  

NASA Astrophysics Data System (ADS)

George E. Brown, ranking Democratic member of the U.S. House of Representatives Science Committee, died on July 15 at the age of 79 due to complications following a heart valve replacement last May. He was a strong advocate for science and environmental protection measures, and an independent thinker who sometimes found himself alone or far ahead of other people on issues. A congressman for 34 years who represented first the 29th Congressional District and then the 42nd District in California, Brown served on the science committee since 1965 and was chair from 1991 through 1994.

Showstack, Randy

368

Method of extruding and packaging a thin sample of reactive material, including forming the extrusion die  

DOEpatents

This invention teaches a method of cutting a narrow slot in an extrusion die with an electrical discharge machine by first drilling spaced holes at the ends of where the slot will be, whereby the oil can flow through the holes and slot to flush the material eroded away as the slot is being cut. The invention further teaches a method of extruding a very thin ribbon of solid highly reactive material such as lithium or sodium through the die in an inert atmosphere of nitrogen, argon, or the like as in a glovebox. The invention further teaches a method of stamping out sample discs from the ribbon and of packaging each disc by sandwiching it between two aluminum sheets and cold welding the sheets together along an annular seam beyond the outer periphery of the disc. This provides a sample of high purity reactive material that can have a long shelf life.

Lewandowski, E.F.; Peterson, L.L.

1981-11-30

369

Method of extruding and packaging a thin sample of reactive material including forming the extrusion die  

DOEpatents

This invention teaches a method of cutting a narrow slot in an extrusion die with an electrical discharge machine by first drilling spaced holes at the ends of where the slot will be, whereby the oil can flow through the holes and slot to flush the material eroded away as the slot is being cut. The invention further teaches a method of extruding a very thin ribbon of solid highly reactive material such as lithium or sodium through the die in an inert atmosphere of nitrogen, argon or the like as in a glovebox. The invention further teaches a method of stamping out sample discs from the ribbon and of packaging each disc by sandwiching it between two aluminum sheets and cold welding the sheets together along an annular seam beyond the outer periphery of the disc. This provides a sample of high purity reactive material that can have a long shelf life.

Lewandowski, Edward F. (Westmont, IL); Peterson, Leroy L. (Joliet, IL)

1985-01-01

370

Die Infrarot- und die Videookulographie – Alternativen zur Elektrookulographie?  

Microsoft Academic Search

Zusammenfassung  \\u000a Neuartige Technologien für die Registrierung von Augenbewegungen werfen die Frage auf, ob sie für die HNO-Heilkunde eine zuverlässige\\u000a und genaue Alternative zur bewährten Elektrookulographie darstellen. Ein direkter Vergleich zwischen drei verschiedenen Technologien,\\u000a nämlich der Elektrookulographie (EOG), der Videookulographie (VOG) und der Infrarotokulographie (IROG) wurde anhand der mittleren\\u000a Geschwindigkeit der langsamen Phase (SPV) während den 4 Routineuntersuchungen der Nystagmographieuntersuchungsbatterie, also

A. Schmid-Priscoveanu; J. H. J. Allum

1999-01-01

371

Zinc coated sheet steel for press hardening  

NASA Astrophysics Data System (ADS)

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.

Ghanbari, Zahra N.

372

The Adoption of Electronic Benefit Transfer Card for Delivering Food Stamp Benefits in Alabama: Perceptions of College Students Participating in the Food Stamp Program  

ERIC Educational Resources Information Center

The reasons for moving from paper coupons to delivering food stamps electronically include potential reduction in the cost of administering the system and in fraud, theft and abuse of the system. Furthermore, the use of EBT is believed o reduce social stigma and embarrassment felt by recipients when using paper coupon. Therefore, using survey data…

Zekeri, Andrew A.

2004-01-01

373

Graphite/Thermoplastic-Pultrusion Die  

NASA Technical Reports Server (NTRS)

Attachment to extruder produces thermoplastic-impregnated graphite tape. Consists of profile die, fiber/resin collimator, and crosshead die body. Die designed to be attached to commercially available extrusion machine capable of extruding high-performance thermoplastics. Simple attachment to commercial extruder enables developers of composites to begin experimenting with large numbers of proprietary resins, fibers, and hybrid composite structures. With device, almost any possible fiber/resin combination fabricated.

Wilson, Maywood L.; Frye, Mark W.; Johnson, Gary S.; Stanfield, Clarence E.

1990-01-01

374

Linkping University Electronic Press  

E-print Network

Theses In January 2007, LiU E-Press stopped contacting Ph.D. students who had failed to published solution was found as part of a larger restructuring of LiU E-Press. As of September 1st , the BoardTek)) was disbanded and E-Press moved wholly into the jurisdiction of LiU library, falling under the Board

Zhao, Yuxiao

375

Spectral characterization of postage stamp printing inks by means of Raman spectroscopy.  

PubMed

Time travel through 150 years of Italian postage stamp issues has allowed defining the evolution of the recurring pigments in stamp designs by means of Raman and FTIR spectroscopy. Numerous exemplars have been analyzed, covering the entire production of stamps for both the Italian Kingdom and Republic. Raman and FTIR spectra showed the changeover from Prussian blue to copper phthalocyanine inks in 1958. The entire succession for red inks was also recognized to develop from the original cinnabar to red ochre and minium and finally to red azo pigments. The changes in orange printing ink proceeded on a similar path. The first orange Italian exemplar was printed employing a mixture of chrome orange and red ochre. In 1929 this combination was replaced by azo pigments. Green stamps belonging to the first issues entailed the choice of blue and orange inks, namely chrome orange and Prussian blue. Later on, an ink composed mainly of phthalocyanine was employed as the green dye. The merging of data coming from Raman microscopy and FTIR-ATR spectroscopy, both non-destructive techniques, has allowed the characterization of stamp designs and potentially provides direct and fast evidence for the recognition of forged exemplars. PMID:25625140

Imperio, Eleonora; Giancane, Gabriele; Valli, Ludovico

2015-02-16

376

Should Canadian health promoters support a food stamp-style program to address food insecurity?  

PubMed

Food insecurity is an urgent public health problem in Canada, affecting 4 million Canadians in 2012, including 1.15 million children, and associated with significant health concerns. With little political will to address this significant policy issue, it has been suggested that perhaps it is time for Canada to try a food stamp-style program. Such a program could reduce rates of food insecurity and improve the nutritional health of low-income Canadians. In this article, we explore the history of the US food stamp program; the key impetus of which was to support farmers and agricultural interests, not to look after the needs of people living in poverty. Though the US program has moved away from its roots, its history has had a lasting legacy, cementing an understanding of the problem as one of lack of food, not lack of income. While the contemporary food stamp program, now called Supplemental Nutrition Assistance Program (SNAP), reduces rates of poverty and food insecurity, food insecurity rates in the USA are significantly higher than those in Canada, suggesting a food stamp-style program per se will not eliminate the problem of food insecurity. Moreover, a food stamp-style program is inherently paternalistic and would create harm by reducing the autonomy of participants and generating stigma, which in itself has adverse health effects. Consequently, it is ethically problematic for health promoters to advocate for such a program, even if it could improve diet quality. PMID:25256001

Power, Elaine M; Little, Margaret H; Collins, Patricia A

2015-03-01

377

A clinical perspective on dying  

PubMed Central

There is continuing need for dissemination of already available, clinically useful knowledge concerning the psychological needs of the seriously ill and dying. Against the changing social context of dying, some of our erroneous assumptions about these patients are explored and the genuine fears and personal needs are discussed. The implications of this knowledge for medical education are recognized. PMID:5074753

Janes, Robert G.

1972-01-01

378

Two Piece Compaction Die Design  

SciTech Connect

Compaction dies used to create europium oxide and tantalum control plates were modeled using ANSYS 11.0. Two-piece designs were considered in order to make the dies easier to assemble than the five-piece dies that were previously used. The two areas of concern were the stresses at the interior corner of the die cavity and the distortion of the cavity wall due to the interference fit between the two pieces and the pressure exerted on the die during the compaction process. A successful die design would have stresses less than the yield stress of the material and a maximum wall distortion on the order of 0.0001 in. Design factors that were investigated include the inner corner radius, the value of the interference fit, the compaction force, the size of the cavity, and the outer radius and geometry of the outer ring. The results show that for the europium oxide die, a 0.01 in. diameter wire can be used to create the cavity, leading to a 0.0055 in. radius corner, if the radial interference fit is 0.003 in. For the tantalum die, the same wire can be used with a radial interference fit of 0.001 in. Also, for the europium oxide die with a 0.003 in. interference fit, it is possible to use a wire with a diameter of 0.006 in. for the wire burning process. Adding a 10% safety factor to the compaction force tends to lead to conservative estimates of the stresses but not for the wall distortion. However, when the 10% safety factor is removed, the wall distortion is not affected enough to discard the design. Finally, regarding the europium oxide die, when the cavity walls are increased by 0.002 in. per side or the outer ring is made to the same geometry as the tantalum die, all the stresses and wall distortions are within the desired range. Thus, the recommendation is to use a 0.006 in. diameter wire and a 0.003 in. interference fit for the europium oxide die and a 0.01 in. diameter wire and a 0.001 in. interference fit for the tantalum die. The dies can also be made to have the same outer geometry if desired.

Coffey, Ethan N [ORNL

2010-03-01

379

Press Relations: Carter's Example.  

ERIC Educational Resources Information Center

Although different philosophies may motivate presidential-press relations, causing frequent friction or adversity, there is nevertheless a strong degree of cooperation and collaboration between the press and a president of the United States. This interdependence has been particularly evident in recent administrations, and it progresses…

Kindsvatter, Peter S.

380

Lyndon Johnson's Press Conferences.  

ERIC Educational Resources Information Center

Because President Lyndon Johnson understood well the publicity value of the American news media, he sought to exploit them. He saw reporters as "torch bearers" for his programs and policies and used the presidential press conference chiefly for promotional purposes. Although he met with reporters often, his press conferences were usually…

Cooper, Stephen

381

Die Euler-Mascheroni-Konstante Niloufar Rahi  

E-print Network

, die nach dem Mathe- matiker Leonhard Euler benannt ist: die Euler-Mascheroni-Konstante 0, 5772156649Die Euler-Mascheroni-Konstante Niloufar Rahi Ausarbeitung zum Vortrag in Überraschungen und Euler-Konstante die Rede ist, denkt man zuerst an die Zahl e 2, 7182818284 . . ., also den Wert der

Thäter, Gudrun

382

Zukunftssicherung für die Zeit nach der Krise  

Microsoft Academic Search

Die Studie berichtet zusammenfassend über die Ergebnisse der 9. HR-Expertenbefragung mit der Zeitschrift „Personalwirtschaft“ zum Thema „Employer Branding“. Berichtet wird über die Verbreitung des Employer Branding, die dabei verfolgten Ziele und die Instrumente, mit denen ein erfolgreiches Employer Branding realisiert werden kann. Eng damit verbunden sind ergänzende Fragen nach den Einflussfaktoren und den Gestaltungsmöglichkeiten der Arbeitgebermarke sowie nach den eingesetzten

Karl-Friedrich Ackermann; Martina Wehner

2009-01-01

383

High-precision microcontact printing of interchangeable stamps using an integrated kinematic coupling.  

PubMed

Microcontact printing (µCP) is a rapid, inexpensive way to create microscale chemical or biochemical patterns on a target surface. This microstamping method can be used to selectively modify a wide array of surface properties, from wettability and protein adsorption to chemical etch susceptibility. However, controlling the absolute location of features created with microcontact printing is difficult; this lack of precision makes it challenging to integrate with other microfabrication methods or to create complex, multi-chemical patterns on a single surface. In this research, we demonstrate a novel method of controlling the placement of microcontact printing stamps by using an integrated kinematic coupling device. This technique relies on mechanical reference points for rapid, optics-free registry of the stamp and allows µCP stamps to be quickly removed and replaced or even exchanged with submicron repeatability. PMID:21116585

Trinkle, Christine A; Lee, Luke P

2011-02-01

384

Numerical simulation of temperature field, microstructure evolution and mechanical properties of HSS during hot stamping  

NASA Astrophysics Data System (ADS)

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.

Shi, Dongyong; Ying, Liang; Hu, Ping; Liu, Wenquan; Shen, Guozhe

2013-12-01

385

Polymer photovoltaic cells with a graded active region achieved using double stamp transfer printing  

NASA Astrophysics Data System (ADS)

We demonstrate that double stamp transfer printing of the poly(3-hexylthiophene) (P3HT):[6,6]-phenyl C61-butyric acid methyl ester (PCBM) active layer on MoO3 of an organic photovoltaic (OPV) cell enhances the charge collection efficiency at the anode and cathode contacts by creating a concentration gradient of the P3HT and PCBM across the bulk heterojunction active layer. This gradient increases the short circuit current and the power conversion efficiency of stamp-transferred P3HT:PCBM polymer OPVs by 23% compared with that of similarly structured spin-coated polymer OPVs due to the graded active layer composition, resulting in a power conversion efficiency of 3.7 ± 0.2% for an as-cast device. The stamp-transfer printing process provides a route to low cost fabrication of OPVs over large flexible substrate areas.

Joo Cho, Yong; Yeob Lee, Jun; Forrest, Stephen R.

2013-11-01

386

Numerical simulation of temperature field, microstructure evolution and mechanical properties of HSS during hot stamping  

SciTech Connect

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.

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

387

Adapt or die?  

PubMed

The worldwide economic recession and the concomitant limited stock of finances have had an influence on the available money of every household and have also inhibited the improvement of socio-economic conditions and medicine. The Reconstruction and Development Programme (RDP) has the objective of improving the living conditions of the people with regard to housing, education, training and health care. The latter seems to be a major problem which has to be addressed with the emphasis on the preventive and promotional aspects of health care. A comprehensive health care system did not come into being property in the past because of the maldistribution of health care services, personnel and differences in culture and health care beliefs and values. The question that now arises, is how to render a quality health care service within the constraints of inadequate financing and resources. A comprehensive literature study has been done with reference to quality health care and financing followed by a survey of existing health services and finances. Recommendations are made about minimum requirements to be accepted if one were to adapt rather than die in terms of the provision of healthcare: the decentralization and rationalization of the administration of health care, the stress on and realization of effective and efficient primary health care, the acceptance of participative management in health providing organizations, the provision of financial management training for health care managers and the application of management accounting principles for the improvement of the efficiency and effectiveness of management. PMID:9283343

Visser, S S; Nel, A H

1996-12-01

388

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

E-print Network

of STAMP (Systems-Theoretic Accident Model and Processes) or Evaluating Project Safety (System EngineeringIntegrating Safety into an Engineering Contractor's System Engineering process using the guidelines.............................................................................. 16 1.4.2 Analysis of STAMP Steps

Leveson, Nancy

389

Stamping-based planarization of flexible substrate for low-pressure UV nanoimprint lithography.  

PubMed

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

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

390

Has the Food Stamp Program become More Accessible? Impacts of Recent Changes in Reporting Requirements and Asset Eligibility Limits  

ERIC Educational Resources Information Center

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…

Hanratty, Maria J.

2006-01-01

391

Millimeter-scale contact printing of aqueous solutions using a stamp made out of paper and tape  

E-print Network

'') as a contact printing device. The device is made from inexpensive materials, and it is easily assembled by hand 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

Prentiss, Mara

392

Development of Estimation Procedure of Contact Heat Transfer Coefficient at the Part-Tool Interface in Hot Stamping Process  

Microsoft Academic Search

Energy efficiency, a high level of passenger safety, and weight reduction of the vehicles still constitute the main functional elements for the design of modern car body structures. Toward this objective, the usage of advanced sheet-metal forming technologies like hot stamping of quenchable boron manganese steel is developing nowadays. Hot stamping is a combination of hot forming and simultaneously quenching

Bakri Abdulhay; Brahim Bourouga; Christine Dessain; Gilles Brun; Joel Wilsius

2011-01-01

393

Internet-Based Training to Improve Preschool Playground Safety: Evaluation of the Stamp-in-Safety Programme  

ERIC Educational Resources Information Center

Objective: Playground injuries result in over 200,000 US pediatric emergency department visits annually. One strategy to reduce injuries is improved adult supervision. The Stamp-in-Safety programme, which involves supervisors stamping rewards for children playing safely, has been demonstrated in preliminary classroom-based work to reduce child…

Schwebel, David C.; Pennefather, Jordan; Marquez, Brion; Marquez, Jessie

2015-01-01

394

Transfer printing of 3D hierarchical gold structures using a sequentially imprinted polymer stamp  

NASA Astrophysics Data System (ADS)

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 and isolated 3D structures can be selectively fabricated with the assistance of thermo-mechanical deformation of the polymer stamp. Hierarchical Au structures are achieved without the need for a corresponding three-dimensionally patterned mold.

Zhang, Fengxiang; Low, Hong Yee

2008-10-01

395

A non-fluorine mold release agent for Ni stamp in nanoimprint process  

Microsoft Academic Search

This study presents a novel material as an anti-adhesive layer between Ni mold stamps and polymethyl methacrylate (PMMA) substrate in nanoimprint process. A polybenzoxazine ((6,6’-bis(2,3-dihydro-3-methyl-4H-1,3-benzoxazinyl))) molecule self-assembled monolayer (PBO-SAM) considering as anti-adhesive coating agent demonstrates that non-fluorine-containing compounds can be improve the nanoimprint process in Ni\\/PMMA substrates. In this work, the nanostructure-based Ni stamps and the imprinted PMMA mold are

Tien-Li Chang; Jung-Chang Wang; Chun-Chi Chen; Ya-Wei Lee; Ta-Hsin Chou

2008-01-01

396

The restoration of obliterated stamped serial numbers by ultrasonically induced cavitation in water  

NASA Technical Reports Server (NTRS)

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.

Young, S. G.

1973-01-01

397

Nanotransfer printing using plasma etched silicon stamps and mediated by in situ deposited fluoropolymer.  

PubMed

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

Bhandari, Deepak; Kravchenko, Ivan I; Lavrik, Nickolay V; Sepaniak, Michael J

2011-05-25

398

Über die Bedeutung der Graphologie für die gerichtsärztliche Begutachtung  

Microsoft Academic Search

Zusammenfassung  \\u000a \\u000a \\u000a \\u000a 1. \\u000a \\u000a Die Graphologie ist eine Wissenschaft, die für charakterologische Behauptungen eine objektiv faßbare Grundlage bietet.\\u000a \\u000a \\u000a \\u000a \\u000a 2. \\u000a \\u000a Gegenüber der Beobachtung und Psychoanalyse bietet die Graphologie den Vorteil, daß sie unter völliger Wahrung der Integrität\\u000a des Patienten sehr viel schneller zum Ziele führt, auch wenn durch Unechtheit oder Verschlossenheit eine Erschwerung vorliegt.\\u000a \\u000a \\u000a \\u000a \\u000a 3. \\u000a \\u000a Die Graphologie ist eine Wissenschaft, deren sich der

A. Jores

1927-01-01

399

Die Frequenz, die wichtigste Eigenschaft des Augenzitterns der Bergleute  

Microsoft Academic Search

Von 1914–1950 ist die Frequenz im Hellen im Durchschnitt um 30 Schwingungen in der Minute gestiegen. Diese Zunahme ist größer als der Unterschied zwischen der Hell- und Dunkelfrequenz, der im Durchschnitt höchstens 17 Schwingungen beträgt.

J. Ohm

1952-01-01

400

Legendary Filmmaker Dies at age 95  

NSDL National Science Digital Library

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.

Green, Marcia.

401

The Press Freedom Database  

NSDL National Science Digital Library

Developed by the Committee to Protect Journalists (CPJ), The Press Freedom Database contains case histories of documented press freedom violations against journalists and media organizations worldwide as well as annual CPJ reports on the violations in specific countries and regions. The case histories document the circumstances in which journalists have been attacked, killed, expelled, censored, harassed, threatened, and/or imprisoned. The database is searchable by journalist name, news organization, type of organization, date, country, or region. Currently, the database, which is updated weekly, contains over 2,000 reports of press freedom violations, spanning from 1993 to the present.

402

Die fermentative Spaltung des Acetylcholins  

Microsoft Academic Search

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.

R. Ammon

1934-01-01

403

UNIVERSIT DE GENVE Dies Academicus  

E-print Network

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

Loewith, Robbie

404

Salicylatreiche Weiden für die Arzneimittelherstellung  

Microsoft Academic Search

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

Nadja Förster; Christian Ulrichs; Matthias Zander; Ralf Kätzel; Inga Mewis

2009-01-01

405

Destination Disney: Die japanischen Erfahrungen  

Microsoft Academic Search

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

Ute Hoffmann

406

Trashing the Press.  

ERIC Educational Resources Information Center

Discusses ominous assaults on press freedom on college campuses across the United States. Laments the lack of concern about First Amendment issues involved in these incidents, in which student newspapers have been stolen, trashed, and burned. (SR)

McMasters, Paul

1994-01-01

407

Imprinted 50 nm Features Fabricated by Step and Stamp UV Imprinting  

NASA Astrophysics Data System (ADS)

We fabricated features down to 50 nm by UV step and stamp imprint lithography (UV-SSIL). This method enables fast sequential imprinting for large areas operating at room temperature with a low-viscosity material. This allows the patterning of both large micron-scale and submicron-scale structures simultaneously. A low-viscosity polymer allows pattern transfer at moderate pressures, thereby reducing mechanical stress on the stamp and substrate. Processing at room temperature helps to maintain the alignment and to prevent the distortion of the features caused by the thermal expansion of the mold and substrate. A UV-SSIL experiment with a novel photosensitive polymer was performed using a prototype of currently commercially available machines used for both thermal and UV step and stamp imprintings. As a master, we used a transparent quartz stamp (with features down to 50 nm) patterned by electron-beam lithography. The polymer was dispensed on a 100 mm silicon substrate using a syringe-type dispensing system. The results were analyzed by atomic force microscopy and a scanning electron microscopy. The fabricated structures exhibited good lateral and vertical feature replication fidelities.

Haatainen, Tomi; Majander, Päivi; Mäkelä, Tapio; Ahopelto, Jouni; Kawaguchi, Yasuhide

2008-06-01

408

Falling through the Social Safety Net: Food Stamp Use and Nonuse among Older Impoverished Americans  

ERIC Educational Resources Information Center

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…

Fuller-Thomson, Esme; Redmond, Melissa

2008-01-01

409

Welfare Reform and Older Immigrants: Food Stamp Program Participation and Food Insecurity  

ERIC Educational Resources Information Center

Purpose: The welfare reform bill of 1996 severely constrained noncitizens' eligibility for the Food Stamp Program (FSP). This study examined the effects of eligibility restrictions on older immigrants' FSP participation and food insecurity. We paid special attention to household composition and household eligibility as well as older immigrants'…

Nam, Yunju; Jung, Hyo Jin

2008-01-01

410

Service-Learning with a Food Stamp Enrollment Campaign: Community and Student Benefits  

ERIC Educational Resources Information Center

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…

Porter, Judith R.; Summers, Mary; Toton, Suzanne; Aisenstein, Hillary

2008-01-01

411

Watching the Clocks: The Role of Food Stamp Recertification and TANF Time Limits in Caseload Dynamics  

ERIC Educational Resources Information Center

We use administrative data to examine how "clock" policies--program time limits and recurring deadlines for confirming eligibility--affected participation in South Carolina's TANF and Food Stamp Programs from 1996-2003. South Carolina's TANF program limits most families to two years of benefits in any ten-year period; so, recipients began…

Ribar, David C.; Edelhoch, Marilyn; Liu, Qiduan

2008-01-01

412

Impacting Mediators of Change for Physical Activity among Elderly Food Stamp Recipients  

ERIC Educational Resources Information Center

A multidisciplinary team developed and pilot-tested a curriculum, delivered by trained lay educators, to increase self-efficacy for physical activity among elderly food stamp recipients. Curriculum development was guided by a comprehensive literature review. Process evaluation was used to revise the curriculum and to assess lay educator training…

Dye, Cheryl J.; Williams, Joel E.; Kemper, Karen A.; McGuire, Francis A.; Aybar-Damali, Begum

2012-01-01

413

Development of Core Competencies for Paraprofessional Nutrition Educators Who Deliver Food Stamp Nutrition Education  

ERIC Educational Resources Information Center

The purpose of this project was to describe the process used for the development of core competencies for paraprofessional nutrition educators in Food Stamp Nutrition Education (FSNE). The development process included the efforts of an expert panel of state and multicounty FSNE leaders to draft the core competencies and the validation of those…

Baker, Susan S.; Pearson, Meredith; Chipman, Helen

2009-01-01

414

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

E-print Network

PATIENT NAME: PATIENT DATE OF BIRTH: PATIENT MEDICAL RECORD # (IF ADDRESSOGRAPH STAMP IS NOT USED including copies of my medical record of care received at to the following persons at the locations Operative Reports Ã? Other (please specify) Ã? Pathology Reports Ã? Medical Record Abstract (e.g. History

Mootha, Vamsi K.

415

The study on numerical simulation of the laser tailor welded blanks stamping  

Microsoft Academic Search

The stamping process of the tailor welded blank (TWB) was simulated by the software of DYNAFORM. The finite element model of a boxy part was founded, and the forming of different thickness and properties of the material was studied. Meanwhile, the influence of weld seam on forming result was analyzed. The results show that the weld seam model which founded

X. G. Qiu; W. L Chen

2007-01-01

416

Food Stamp and School Lunch Programs Alleviate Food Insecurity in Rural America. Fact Sheet  

ERIC Educational Resources Information Center

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…

Smith, Kristin; Savage, Sarah

2007-01-01

417

Failure Analysis of Warm Stamping of Magnesium Alloy Sheet Based on an Anisotropic Damage Model  

NASA Astrophysics Data System (ADS)

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.

Zhao, P. J.; Chen, Z. H.; Dong, C. F.

2014-08-01

418

Simulation and Evaluation of Phase Transformations and Mechanical Response in the Hot Stamping Process  

Microsoft Academic Search

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

Mats Oldenburg; Paul Kerström; Greger Bergman; Per Salomonsson

2007-01-01

419

Towards the three-dimensional FE analysis of rapid prototyping tools for sheet metal stamping process  

Microsoft Academic Search

For low volume production or for rapid prototyping, sheet metal stamping tools can be made by an assemblage of steel sheets or layers and joined by several techniques (such as screws, bolts, brazing, adhesive). However, an important problem in the design and the production of such tools is their mechanical behaviour, in particular the strength of joining techniques which is

M. Oudjene; L. Penazzi; J.-L. Batoz

2007-01-01

420

Artificial intelligence applied to automatic supervision, diagnosis and control in sheet metal stamping processes  

Microsoft Academic Search

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

C. García

2005-01-01

421

Determination of Proper Austenitization Temperatures for Hot Stamping of AISI 4140 Steel  

NASA Astrophysics Data System (ADS)

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.

Samadian, Pedram; Parsa, Mohammad Habibi; Shakeri, Amid

2014-04-01

422

Evaluating of TRB stamping process plans based on theory of fuzzy set barycenter  

Microsoft Academic Search

Generalizing tailor rolled blank applied in panels is one of efficient approach for automobile realizing lightweight, the stamping process plans based on general blank are affirmed even depending on experience, the uncertainty of plans decision making must greatly boost up if TRB will be applied in panels. Theory of fuzzy set barycenter was put forward to decision make plans in

Jitao Du; Yanhua Li; Hongbin Fei

2009-01-01

423

NUMISTAMP: a research project for assessment of finite-element models for stamping processes  

Microsoft Academic Search

This paper describes the objectives and current status of the research project NUMISTAMP currently under development at the International Center for Numerical Methods in Engineering of (CIMNE) located in Barcelona, Spain. The aim of this project is the assesment of different finite element models for simulation of sheet stamping processes. The models currently analyzed include: quasistatic viscoplastic flow and elastoplastic

E. Oñate; J. Rojek; C. García Garino

1995-01-01

424

Fault diagnosis of stamping process based on empirical mode decomposition and learning vector quantization  

Microsoft Academic Search

Sheet metal stamping process is widely used in industry due to its high accuracy and productivity. However, monitoring the process is a difficult task since the monitoring signals are typically non-stationary transient signals. In this paper, empirical mode decomposition (EMD) is applied to extract the main features of the strain signals. First, the signal is decomposed by EMD into intrinsic

A. M. Bassiuny; Xiaoli Li; R. Du

2007-01-01

425

Planar heterojunction organic photovoltaic diodes via a novel stamp transfer process  

Microsoft Academic Search

Solution-processed, planar heterojunction organic photovoltaic diodes offer several potential advantages over bulk heterojunction structures in relation to electrode selectivity, reduced dark currents and suitability for fundamental studies. They have, however, received less interest in recent years, in large part due to fabrication difficulties encountered for sequential solution deposition steps. In this study, a novel stamp transfer technique that allows ready

Toby A. M. Ferenczi; Jenny Nelson; Colin Belton; Amy M. Ballantyne; Mariano Campoy-Quiles; Felix M. Braun; Donal D. C. Bradley

2008-01-01

426

Characterization of interfacial friction in coated sheet steels: influence of stamping process parameters and wear mechanisms  

Microsoft Academic Search

By means of a tensile strip testing system, the nature of interfacial friction in stamping operations were investigated for three different coated sheet steels. Friction coefficient measurements were taken at seventeen distinct operating conditions by varying the sheet strip coating material (lead and zinc), applied lubricant (oil-base lubricants and greases) and pin radii (10 and 20 mm). In addition to

M. R Lovell; Zhi Deng

2002-01-01

427

Evaluating Food Stamp Nutrition Education: Process for Development and Validation of Evaluation Measures  

Microsoft Academic Search

The purpose of this paper is to describe a process for developing and validating outcome measures relevant to dietary quality behaviors targeted by Food Stamp Nutrition Education (FSNE). The ultimate goal is a measure that is valid, reliable, sensitive to change, and practical for use for a wide variety of FSNE evaluation purposes. The development process has incorporated input from

Marilyn S. Townsend

2006-01-01

428

Automatic correction of the time step in implicit simulations of the stamping process  

Microsoft Academic Search

A specific aspect of simulations of stamping processes is the numerical method adopted to include the non-linearities associated with the frictional contact problem in large deformation plasticity. In fact, convergence problems are frequently encountered, especially when using a quasi-static implicit algorithm. One way of increasing the numerical robustness of these algorithms is to adopt an augmented Lagrangian method to incorporate

M. C Oliveira; L. F Menezes

2004-01-01

429

POLYELECTROLYTE MULTILAYER STAMPING IN AQUEOUS PHASE AND NON-CONTACT MODE.  

PubMed

Polyelectrolyte multilayer (PEM) transfer printing has been previously achieved by stamping under dry conditions. Here, we show for the first time, that PEM can be transferred from a stamp to the base substrate under aqueous conditions whereby the two surfaces are in a non-contact mode. Degradable multilayers of (PAA/PEG)(10.5) followed by non-degradable multilayers of (PDAC/SPS)(80.5) were fabricated under acidic pH conditions on either PDMS or glass (stamp), and subsequently transferred over top of another multilayer prepared on a different substrate (base substrate), with a spacing of ~ 200 ?m between the stamping surface and the base substrate. This multilayer transfer was performed under physiological pH conditions. This process is referred to herein as non-contact, aqueous-phase multilayer (NAM) transfer. NAM transfer can be useful for applications such as fabricating three-dimensional (3-D) cellular scaffolds. We attempted to create a 3-D cellular scaffold using NAM transfer, and characterized the scaffolds with conventional and fluorescence microscopy. PMID:21860540

Mehrotra, Sumit; Lee, Ilsoon; Liu, Chun; Chan, Christina

2011-08-01

430

Failure Analysis of Warm Stamping of Magnesium Alloy Sheet Based on an Anisotropic Damage Model  

NASA Astrophysics Data System (ADS)

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.

Zhao, P. J.; Chen, Z. H.; Dong, C. F.

2014-11-01

431

Analysis of an equivalent drawbead model for the finite element simulation of a stamping process  

Microsoft Academic Search

In order to facilitate the three-dimensional finite element analysis for the stamping process, an equivalent drawbead model was adopted to simulate the restraining effects produced by the real drawbead. In the present study, the restraining force exerted by the real drawbead was first computed by the finite element simulation, and the optimum pseudo drawing speed and mesh sizes for both

Fuh-Kuo Chen; Jia-Hong Liu

1997-01-01

432

Application of a feasible formability diagram for the effective design in stamping processes of automotive panels  

Microsoft Academic Search

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

Dae-Cheol Ko; Seung-Hoon Cha; Sang-Kon Lee; Chan-Joo Lee; Byung-Min Kim

2010-01-01

433

MERCURY IN STAMP SAND DISCHARGES: IMPLICATIONS FOR LAKE SUPERIOR MERCURY CYCLING  

EPA Science Inventory

Approximately a half billion tons of waste rock from the extraction of native copper and silver ores was discharged into the Lake Superior basin. Stamping was the method of choice to recover these metals from the surrounding poor rock. This process created large amounts of extre...

434

Production of Sponge Rubber for Monolayer Rubber Stamp Using Salt Leaching Method  

Microsoft Academic Search

Sponge rubber used for monolayer rubber stamp was produced from nitrile butadiene rubber (NBR). Open cells in sponge rubber were created using salt leaching method. Effect of size and amount of sodium chloride which was used as a water soluble salt on the creation of open cells in the rubber was investigated. Carbon black was used as a filler. A

Wimonrat TRAKANPRUK

435

Texas Food Stamp Employment and Training/JOBS Conformance Demonstration: Cost Analysis Final Report. Revised.  

ERIC Educational Resources Information Center

An evaluation was conducted of the Texas Food Stamp Employment and Training(E&T)/Job Opportunities and Basic Skills Program Conformance Demonstration. The cost analysis determined the impact of the demonstration, the BOND (Better Opportunities for New Directions) program, on costs of administering and providing activity components and support…

O'Shea, Daniel P.; Norris, Dave N.

436

A Comparative Analysis of Different Robust Design Approaches in Sheet Stamping Operations  

NASA Astrophysics Data System (ADS)

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.

Marretta, L.; Di Lorenzo, R.

2011-05-01

437

Inside the War on Poverty: The Impact of Food Stamps on Birth Outcomes  

E-print Network

Inside the War on Poverty: The Impact of Food Stamps on Birth Outcomes Douglas Almond Columbia to the FSP three months prior to birth yielded deliveries with increased birth weight, with the largest gains at the lowest birth weights. These impacts are evident with difference-in-difference models and event study

Silver, Whendee

438

Soft-Contact Optical Lithography Using Transparent Elastomeric Stamps: Application to Nanopatterned Organic Light-Emitting  

E-print Network

such as chrome. In this conventional process, a vacuum and pressure are necessary to enhance the resolving power exposure dose between the contact and the non-contact regions through the PDMS stamp to generate the same plastics) sub- strates at a low cost. In addition, it can be particularly useful for avoiding metal

Rogers, John A.

439

Linkping University Electronic Press  

E-print Network

E-Press for 2007 to 2009. LiU E-Press currently has a collection of about 350 Ph.D. theses, 120 databases. In 2005, 35% of Ph.D. theses produced at LiU were electronically published, 70% in 2006, with new publish (i.e. via the internet) academic reports produced at LiU. These are to include all Ph.D

Zhao, Yuxiao

440

An analysis of the effect of the food stamp program on family consumption behavior in the South of the United States  

E-print Network

instead of stamps. Therefore cash equivalent ratios are calculated for this purpose. The cash equivalent ratio is based on the ratio of cash equivalent value of bonus food stamps relative to the actual bonus food stamps. The impact of selected socio... the ='c ? '. , oeginning January 1 7-, eligi'ble families no lo=ge? . . eve zo p . rchase food steno ce tificates. '. is means thai, the "bonus value" food II stamps a e now given . o the el g' le ecipien. s free. This has increases the food stamp...

Yeung, Miu Ling

1981-01-01

441

Study of Theories about Myopia Progression (STAMP) Design and Baseline Data  

PubMed Central

Purpose The Study of Theories about Myopia Progression (STAMP) is a two-year, double-masked, randomized clinical trial of myopic children 6 to 11 years old. STAMP will evaluate the one-year effect of progressive addition lenses (PALs) compared to single vision lenses (SVLs) on central refraction, peripheral refraction in four quadrants, and accommodative response and convergence. STAMP will also evaluate any changes one year after discontinuing PALs. Baseline characteristics of enrolled children are reported. Methods Eligible children had a high accommodative lag and either: (1) low myopia (less myopic than ?2.25 D spherical equivalent) or (2) high myopia (more myopic that ?2.25 D spherical equivalent) and esophoria at near. Children were randomly assigned to wear either PALs or SVLs for one year to determine the difference in myopia progression in the PAL group relative to the SVL group. All children will then wear SVLs for the second year to evaluate the permanence of any treatment effect. Complete ocular biometric data are collected at six-month intervals. Results Over 17 months, 192 children were screened, and 85 (44%) were eligible and enrolled. Of these 85 children, 44 (52%) were female, and 54 (64%) were esophoric at near. The mean age (± SD) was 9.8 ± 1.3 years. The right eye mean cycloplegic spherical equivalent refractive error was ?1.95 ± 0.78 D. Horizontal relative peripheral hyperopia (30° nasal retina +0.56 ± 0.59 D; 30° temporal retina +0.61 ± 0.77 D) and vertical relative peripheral myopia (30° superior retina ?0.36 ± 0.92 D; 20° inferior retina ?0.48 ± 0.83 D) were found. Conclusions The baseline data for STAMP are reported. Asymmetry between vertical and horizontal meridian relative peripheral refraction was found. STAMP will utilize the ocular biometric changes associated with the PAL-treatment effect to attempt to elucidate the mechanism responsible for the treatment effect. PMID:20935586

Berntsen, David A.; Mutti, Donald O.; Zadnik, Karla

2011-01-01

442

Die Weltwirtschaft im Wandel: Symposium 1975  

Microsoft Academic Search

Seit einigen Jahren verstärkt sich der Eindruck, daß die Weltwirtschaft in einem raschen Wandel begriffen ist. Die Entwicklungsländer fordern eine neue Weltwirtschaftsordnung. Auf die weltweite Hochkonjunktur ist eine scharfe und recht lange anhaltende Rezession gefolgt; aber noch immer dominieren inflationäre Tendenzen. Den Konjunktureinbruch überlagert hat die Vervielfachung des Ölpreises Ende 1973. Sie wurde von vielen Beobachtern als Beginn einer Phase

Kenzo Hemmi; Hisao Kanamori; Yoichi Okita; Toshio Shishido; Carl E. Beigie; C. Fred Bergsten; James S. Duesenberry; Edward R. Fried; Philip H. Trezise; Paul A. Volcker; Jacques de Bandt; Hendricus Cornelius Bos; John H. Dunning; Herbert Giersch; Lutz Hoffmann; Karl Schiller; Pierre-Paul Schweitzer

1975-01-01

443

Use of RSP Tooling to Manufacture Die Casting Dies  

SciTech Connect

The technology and art used to construct die casting dies has seen many improvements over the years. However, the time lag from when a design is finalized to the time a tool is in production has remained essentially the same. The two main causes for the bottleneck are the need to qualify a part design by making prototypes (usually from an alternative process), and the production tooling lead time after the prototypes are approved. Production tooling costs are high due to the labor and equipment costs associated with transforming a forged block of tool steel into a finished tool. CNC machining, sink EDM, benching, engraving and heat treatment unit operations are typically involved. As a result, there is increasing interest in rapid tooling (RT) technologies that shorten the design-to-part cycle and reduce the cost of dies. There are currently more than 20 RT methods being developed and refined around the world (1). The "rapid" in rapid tooling suggests time compression for tool delivery, but does not address robustness as nearly all RT approaches are intended for low-volume prototype work, primarily for molding plastics. Few options exist for die casting. An RT technology suitable for production-quality tooling in the time it normally takes for prototype tooling is highly desirable. In fact, there would be no need for a distinction between prototype and production tooling. True prototype parts could be made using the same processing conditions and materials intended for production. Qualification of the prototype part would allow the manufacturer to go directly into production with the same tool. A relatively new RT technology, Rapid Solidification Process (RSP) Tooling, is capable of making production-quality tooling in an RT timeframe for die casting applications. RSP Tooling, was developed at the Idaho National Engineering and Environmental Laboratory (INEEL), and commercialized with the formation of RSP Tooling, LLC (2). This paper describes the process, and summarizes properties of H13 tool steel dies.

Kevin McHugh

2004-07-01

444

Comparison of the corrosion behavior of die-upset and sintered NdFeB magnets  

Microsoft Academic Search

Corrosion rates for sintered NdFeB magnets are compared with NdFeB magnets prepared from melt spun material (hot pressed and die upset). Corrosion rates were determined by standard electrochemical methods in 0.9 M Na2SO4, at pH 2.4 and 4.4. Autoclave tests correlated quite well with corrosion rates measured electrochemically in the more aggressive pH electrolyte. The more aggressive pH 2.4 electrolyte

B. M. Ma; D. Lee; B. Smith; S. Gaiffi; B. Owens; H. Bie; G. W. Warren

2001-01-01

445

Hume's System: An Examination of the First Book of His Treatise, by David Pears. New York: Oxford University Press, 1990. Reviewed by David A. Reidy, Jr., University of Kansas  

E-print Network

CRITICAL NOTICE Hume's System: An Examination of the First Book of His Treatise, by David Pears. New York: Oxford University Press, 1990. Reviewed by David A. Reidy, Jr., University of Kansas. In his recent book, Hume's System: An Examination... of the First Book of his Treatise, David Pears presents David Hume not as the radical skeptic many have thought him to be, but rather as a "cautious naturalist" and a "sophisticated empiricist," a philosopher willing to give his epistemological stamp...

Reidy, David A. Jr.

446

Measurement of internal die pressure distributions during pultrusion of thermoplastic composites  

NASA Astrophysics Data System (ADS)

This paper describes the development and use of a thin, disposable pressure sensor designed specifically for monitoring pointwise through-the-thickness consolidation forces developed during composite processing. The unique postage stamp-sized sensor (11.1 mm diameter active gage area and 0.31 mm thickness) can be placed directly at points in or on a laminate where pressure data is desired. The sonsor's small dimensions and low cost permit it to be treated as a disposable item in aerospace and other composite fabrication applications. This paper will illustrate the use of the sensor as a means of measuring the pressures developed inside a die during the pultrusion of a graphite/ULTEM thermoplastic structure, as well as with other pultrusion processing examples.

Fanucci, Jerome P.; Nolet, Stephen C.; Koppernaes, Christian; Kim, Young R.

447

Printing of sub-20 nm wide graphene ribbon arrays using nanoimprinted graphite stamps and electrostatic force assisted bonding  

E-print Network

production. Graphene [1­3], a two-dimensional carbon crystal [2­5], has been explored for many electronic a resist on a fresh-cleaved highly ordered pyrolytic graphite (HOPG) stamp (figures 1(a) and (b)); (ii

448

The Berkeley Electronic Press  

NSDL National Science Digital Library

A new electronic publishing company, The Berkeley Electronic Press (bepress.com), was launched in December 2000 by three University of California, Berkeley economics professors. The press was created in reaction to the frustration over the traditional publishing world by bepress.com founder Bob Cooter, the Herman Selvin Professor of Law at UC-Berkeley. Bepress.com features four scholarly journals The B. E. Journals in Theoretical Economics, The B. E. Journals in Macroeconomics, The B. E. Journals in Economic Analysis and Policy, and Global Jurist. For a limited time only, the full text for all of these journals is free.

449

Numerical Optimization of an Industrial Multi-Steps Stamping Process by Using the Design of Experiment Method  

Microsoft Academic Search

\\u000a The deep drawing process consists in realizing parts with complex shapes like different kind of boxes, cups, etc., from a\\u000a metal sheet. These parts are obtained through one or several stamping steps. The tool setup motion of the stamping process\\u000a is difficult to obtain. It requires practice and special knowledge on the process. The design is long and difficult to

Yann Ledoux; Eric Pairel; Robert Arrieux

450

Elastic-plastic finite element analysis of automotive body panel stamping processes using dynamic explicit time integration scheme  

Microsoft Academic Search

In this article, the elastic-plastic finite element formulations using dynamic explicit time-integration schemes are proposed\\u000a for numerical analysis of automotive body panel stamping processes. A general formulation of finite element simulation for\\u000a complex sheet forming processes with arbitrarily shaped tools is briefly introduced. In finite element simulation of automotive\\u000a body panel stamping processes, the robustness and stability of computation are

D. W. Jung; D. Y. Yang

1999-01-01

451

Numerical simulation and experimental verification in the use of tailor-welded blanks in the multi-stage stamping process  

Microsoft Academic Search

Various social requirements have extended the use of tailor-welded blanks in the automotive industry. The welding of blanks with different material grades, thickness, strength and coatings had introduced many challenging formability problems for the stamping process of tailor-welded blanks. However, in some situations the multi-stage process is a very effective solution for the stamping of tailor-welded blanks with a relatively

H. M. Jiang; S. H. Li; H. Wu; X. P. Chen

2004-01-01

452

Non-Spherical SU8 Microlens Array Fabricated Utilizing a Novel Stamping Process and an ElectroStatic Pulling Method  

Microsoft Academic Search

This paper presents a simple and novel method to fabricate non-spherical SU-8 microlens array utilizing a soft SU-8 stamping approach and an electro-static pulling process. A SU-8 based stamp composed of micro-nozzle arrays and a reservoir structure is first fabricated on a glass substrate using a process of dosage control exposure. The unexposed SU-8 encapsulated in the cross-linked SU-8 shell

Shu-Ming Kuo; Che-Hsin Lin

2009-01-01

453

Die Marie Curie-Individualmanahmen  

E-print Network

Die Marie Curie- Individualma�nahmen Dorothea Ossenberg-Engels Nationale Kontaktstelle Mobilität Alexander von Humboldt-Stiftung EU-Forschung: Informationsveranstaltung zu den Marie Curie-Mobilitätsstipendien Kaiserslautern, 05. Juni 2012 #12;2 Inhalt Teil 1 Einführung zu den Marie Curie-Ma�nahmen Teil 2 Tipps für eine

Berns, Karsten

454

Attitudes on Death and Dying.  

ERIC Educational Resources Information Center

This paper explored attitudes toward death and dying revealed through interviews with members of the clergy, the medical profession, funeral directors, nursing home residents, and selected others. The sampling was small and results are not intended to be representative of the groups to which these people belong. Rather, the study may be used as a…

Andrus, Charles E.

455

Metrics for Tool & Die Making.  

ERIC Educational Resources Information Center

Designed to meet the job-related metric measurement needs of tool and die making students, this instructional package is one of eight for the manufacturing occupations cluster, part of a set of 55 packages for metric instruction in different occupations. The package is intended for students who already know the occupational terminology,…

Cooper, Gloria S., Ed.; Magisos, Joel H., Ed.

456

Where innovation starts Dies Natalis  

E-print Network

#12;Wim Schaefer Professor TU/e Architecture, Building and Planning department Sustainable urban: sustainable urban regions. This challenge to the cooperation of scientists, technical designers, industryWhere innovation starts Dies Natalis Sustainability 27 April 2012 Program for the Academic Ceremony

Franssen, Michael

457

Dying pine infested with beetles  

USGS Multimedia Gallery

Mountain pine beetle-infested trees turn a striking red color throughout their crown as they're dying. Mountain pine beetle outbreaks can result in the loss of millions of pine trees throughout western North America. The beetles lay eggs and develop in the bark of mountain trees, especially lodgepo...

458

Red needles signify dying pines  

USGS Multimedia Gallery

Reddish, dry needles are a sign of dying trees infested with mountain pine beetles.  Mountain pine beetle outbreaks can result in the loss of millions of pine trees throughout western North America. The beetles lay eggs and develop in the bark of mountain trees, especially lodgepole, ponderosa...

459

Die Another Day Rudolf Fleischer  

E-print Network

Information Processing Department of Computer Science and Engineering Shanghai 200433, China rudolf properties for a Hydra that are necessary and sufficient to make it immortal or force it to die. We also give by a simple proof by induction). The work described in this paper was partially supported by a grant from

Fleischer, Rudolf

460

Robert Merton Dies at 92  

ERIC Educational Resources Information Center

This article features Robert Merton, who died recently at age 92. Merton came into this world as a Jewish baby named Meyer Schkolnick. He lived in South Philly where his parents wrenched a living as blue-collar workers. Merton chose an Anglicized name to move into the Yankee dominated America of the 20's and 30's. At Harvard, he studied under…

Snell, Joel C.

2006-01-01

461

Stamping surface-enhanced Raman spectroscopy for label-free, multiplexed, molecular sensing and imaging  

NASA Astrophysics Data System (ADS)

We report stamping surface-enhanced Raman spectroscopy (S-SERS) for label-free, multiplexed, molecular sensing and large-area, high-resolution molecular imaging on a flexible, nonplasmonic surface without solution-phase molecule transfer. In this technique, a polydimethylsiloxane (PDMS) thin film and nanoporous gold disk SERS substrate play the roles as molecule carrier and Raman signal enhancer, respectively. After stamping the SERS substrate onto the PDMS film, SERS measurements can be directly taken from the "sandwiched" target molecules. The performance of S-SERS is evaluated by the detection of Rhodamine 6G, urea, and its mixture with acetaminophen, in a physiologically relevant concentration range, along with the corresponding SERS spectroscopic maps. S-SERS features simple sample preparation, low cost, and high reproducibility, which could lead to SERS-based sensing and imaging for point-of-care and forensics applications.

Li, Ming; Lu, Jing; Qi, Ji; Zhao, Fusheng; Zeng, Jianbo; Yu, Jorn Chi-Chung; Shih, Wei-Chuan

2014-05-01

462

Solid-state superionic stamping with silver iodide-silver metaphosphate glass  

NASA Astrophysics Data System (ADS)

This paper demonstrates and analyzes the new use of the glassy solid electrolyte AgI-AgPO3 for direct nanopatterning of thin silver films with feature resolutions of 30 nm. AgI-AgPO3 has a high room temperature ionic conductivity with Ag + as the mobile ion, leading to silver etch/patterning rates of up to 20 nm s - 1 at an applied bias of 300 mV. The glass can be melt-processed at temperatures below 200 °C, providing a facile and economical pathway for creating large area stamps, including the 25 mm2 stamps shown in this study. Further, the glass is sufficiently transparent to permit integration with existing tools such as aligners and imprint tools, enabling high overlay registration accuracy and facilitating insertion into multi-step fabrication recipes.

Jacobs, K. E.; Hsu, K. H.; Han, X.; Kumar, A.; Azeredo, B. P.; Fang, N. X.; Ferreira, P. M.

2011-10-01

463

Stamp wound assay for studying coupled cell migration and cell debris clearance.  

PubMed

A new method for studying wound healing under realistic conditions in vitro was developed. The method involves creating defined patterns of damaged cell debris with poly(dimethyl)siloxane (PDMS) stamping. This novel assay permitted the quantification of wound healing rates in the presence of cell debris. Experimental results with this assay suggest that cell migration in the presence of cell debris is a two step process requiring (1) non-muscle myosin II-dependent cell clearance followed by (2) cell migration into newly cleared wound areas. The novel stamp wound assay allows the study of coupled cell migration and debris clearance and is a more realistic wound healing assay in vitro. PMID:20961056

Lee, Jiyeon; Wang, Yu-Lin; Ren, Fan; Lele, Tanmay P

2010-11-16

464

Former Supreme Court Justice Henry Blackman Dies  

NSDL National Science Digital Library

This week's In the News looks back at the life and legal legacy of former US Supreme Court Associate Justice Harry Andrew Blackmun, who died last Thursday at the age of 90, five years after a contentious 24-year tenure with the court. Raised in Minnesota and educated at Harvard University, Blackmun served as a judge in the US Court of Appeals for the 8th Circuit before being appointed to the Supreme Court by President Nixon in 1970. Blackmun entered the court as a moderate conservative, but by the end of his long career, his convictions had shifted, and he became regarded as a strong progressive voice championing civil and personal liberties. Blackmun claimed that his ideologies did not change over the course of his career and that his apparent leftward shift was a reflection of the court's transformation to conservatism between 1969 and 1991. During that time period, nine conservative Republican appointees entered the court, replacing several liberal justices and altering the court's composition. Yet despite his self-proclaimed moderate views, Blackmun will be remembered for his liberal jurisprudence, most notably demonstrated in the landmark 50-page majority opinion that he authored in 1973 in the case of Roe v. Wade, which established the constitutional right to abortion. In other important Supreme Court opinions, Blackmun provided a liberal voice as an advocate of free speech, affirmative action, gay rights, and women's rights as well as an opponent of capital punishment. In an interview with The Associated Press after his retirement, Justice Blackmun, who was considered to be a diligent and unassuming man, understated his legal legacy: "I hope I would be remembered as a person of judicial integrity . . . known just as a good worker . . . who held his own and contributed generally to the advancement of the law." The nine resources discussed provide recent news, Supreme Court history, and the full text of related legal documents.

Osmond, Andrew.

465

Lysophosphatidic acid stimulates osteoclast fusion through OC-STAMP and P2X7 receptor signaling.  

PubMed

Bone is continuously remodeled by bone formation and resorption, and cooperative bone metabolism is precisely regulated to maintain homeostasis. Osteoclasts, which are responsible for bone resorption, are differentiated through multiple steps that include cell fusion at the last step of differentiation, yielding multinuclear cells. However, the factors involved in and the precise mechanism of cell fusion are still unknown. To determine the molecules involved in osteoclast fusion, we examined the effect of lysophosphatidic acid (LPA), which has been reported to participate in the progression of cancer bone metastasis. LPA had no effect on osteoclast formation and bone resorption under receptor activator of nuclear factor kappa B ligand (RANKL) conditions, whereas LPA stimulated osteoclast fusion, thereby causing increased osteoclast diameter and bone resorptive capacity under a RANKL-limited condition. This result encouraged us to assess what molecules are needed for LPA-stimulated osteoclast fusion. Interestingly, LPA stimulated osteoclast stimulatory transmembrane protein (OC-STAMP) and P2X7 receptor mRNA expression during osteoclast fusion under a RANKL limiting condition. siRNA-induced OC-STAMP or P2X7 receptor knockdown significantly suppressed the LPA-stimulated increase in osteoclast diameter and bone resorptive capacity in differentiating cultures. Using cyclosporin A as an inhibitor, we revealed that NF-ATc1 directly regulates OC-STAMP and P2X7 receptor expression during LPA-stimulated osteoclast fusion. These results suggest that LPA is a critical regulator of osteoclast fusion by inducing the OC-STAMP and P2X7 receptor. Therefore, LPA signaling might be useful to help understand their effects on osteoclast formation and as a therapeutic target for patients with pathologically increased osteoclast formation. PMID:23624721

Hwang, Young Sun; Ma, Gwang-Taek; Park, Kwang-Kyun; Chung, Won-Yoon

2014-03-01

466

Organic field-effect transistor circuits with electrode interconnections using reverse stamping  

NASA Astrophysics Data System (ADS)

We discuss a non-vacuum low-cost reverse stamping method for the realization of circuits based on top-gate organic field-effect transistors (OFETs) with a bi-layer gate dielectric. This method allows for patterning of high-k inorganic dielectric films produced by atomic layer deposition and consequently of the bilayer gate dielectric layers used in our top-gate OFETs. We demonstrate the fabrication and operation of logic inverters and ring oscillators following this approach.

Choi, Sangmoo; Fuentes-Hernandez, Canek; Yun, Minseong; Dindar, Amir; Khan, Talha M.; Wang, Cheng-Yin; Kippelen, Bernard

2014-10-01

467

The problem of a finite strip compressed between two rough rigid stamps  

NASA Technical Reports Server (NTRS)

A finite strip compressed between two rough rigid stamps is considered. The elastostatic problem is formulated in terms of a singular integral equation from which the proper stress singularities at the corners are determined. The singular integral equation is solved numerically to determine the stresses along the fixed ends of the strip. The effect of material properties and strip geometry on the stress intensity factor is presented graphically.

Gupta, G. D.

1973-01-01

468

The problem of a finite strip compressed between two rough rigid stamps  

NASA Technical Reports Server (NTRS)

A finite strip compressed between two rough rigid stamps is considered. The elastostatic problem is formulated in terms of a singular integral equation from which the proper stress singularities at the corners are determined. The singular integral equation is solved numerically to determine the stresses along the fixed ends of the strip. The effect of material properties and strip geometry on the stress-intensity factor is presented graphically.

Gupta, G. D.

1975-01-01

469

Dynamics of a plant RNA virus intracellular accumulation: stamping machine vs. geometric replication.  

PubMed

The tremendous evolutionary potential of RNA viruses allows them to thrive despite host defense mechanisms and endows them with properties such as emergence, host switching, and virulence. The frequency of mutant viruses after an infectious process results from the interplay between the error rate of the viral replicase, from purifying mechanisms acting after transcription on aberrant RNAs, and from the amplification dynamics of virus RNA positive (+) and negative (-) strands. Two extreme scenarios describing viral RNA amplification are the geometric growth, in which each RNA strand serves as template for the synthesis of complementary strands with the same efficiency, and the stamping machine, where a strand is reiteratively used as template to synthesize multiple copies of the complementary. The resulting mutation frequencies are completely different, being geometric growth largely more mutagenic than stamping machine. In this work we evaluate the contribution of geometric growth and stamping machine to the overall genome amplification of the plant (+)-strand RNA virus turnip mosaic virus (TuMV). By means of transfection experiments of Nicotiana benthamiana protoplasts with a TuMV cDNA infectious clone and by using strand-specific quantitative real-time PCR, we determined the amplification dynamics of viral (+) and (-) RNA during a single-cell infectious process. A mathematical model describing the amplification of each viral strand was fitted to the data. Analyses of the model parameters showed that TuMV (+) and (-) RNA amplification occurs through a mixed strategy with ?93% of genomes produced via stamping machine and only ?7% resulting from geometric growth. PMID:21515574

Martínez, Fernando; Sardanyés, Josep; Elena, Santiago F; Daròs, José-Antonio

2011-07-01

470

Rapid fabrication of ultraviolet-cured polymer microlens arrays by soft roller stamping process  

Microsoft Academic Search

This paper reports an innovative technique for rapid fabrication of ultraviolet-cured polymer microlens arrays based on soft roller stamping process. In this method, a soft roller with microlens array cavity is made by casting a pre-polymer of polydimethylsiloxane (PDMS) in a plastic master of microlens array. The plastic master is prepared using gas-assisted hot embossing of polycarbonate (PC) film over

Chih-Yuan Chang; Sen-Yeu Yang; Ming-Hui Chu

2007-01-01

471

New Crystallization Method of Amorphous Silicon by Selective Area Heating for Stamp Process  

Microsoft Academic Search

We propose a new crystallization technique called selective area heating. In this study, we investigated a new technique for high-reliability selective area crystallization of a-Si films that does not cause thermal damage to glass substrates. We reduced the crystallization time as compared to the conventional solid phase crystallization method using a stamp-type isolated thin heater. The thin heater was fabricated

Do Kyung Kim; Woong Hee Jeong; Choong Hee Lee; Tae Hoon Jeong; Kyung Ho Kim; Tae Hyung Hwang; Nam Seok Roh; Hyun Jae Kim

2009-01-01

472

Impacting Mediators of Change for Physical Activity Among Elderly Food Stamp Recipients  

Microsoft Academic Search

A multidisciplinary team developed and pilot-tested a curriculum, delivered by trained lay educators, to increase self-efficacy for physical activity among elderly food stamp recipients. Curriculum development was guided by a comprehensive literature review. Process evaluation was used to revise the curriculum and to assess lay educator training and pilot test fidelity. Three hundred sixteen low-income older adults participated in curriculum

Cheryl J. Dye; Joel E. Williams; Karen A. Kemper; Francis A. McGuire; Begum Aybar-Damali

2012-01-01

473

Welfare Reform: Few States Are Likely to Use the Simplified Food Stamp Program  

NSDL National Science Digital Library

This report, released by the US General Accounting Office (GAO), examines some of the consequences of the federal Welfare Reform Act of 1996. The report studies the Simplified Food Stamp Program provision of the Welfare Reform Act to identify the seven states that have adopted the program, describe the concerns of the non-participant states regarding increased casework and restricted options, and examines the program's limited effects on households's eligibility and benefits.

1999-01-01

474

Effect Of Die Design On Strength And Deformability Of Hollow Extruded Profiles  

NASA Astrophysics Data System (ADS)

In this paper, the behaviour of two different die design concepts in the production of the same industrial profile is described by both experimental tests and numerical FEM analysis. The investigated parameter is the shape of the leg for the extrusion of an AA6060 round tube 80mm in diameter and 1mm in thickness. Press loads and profile temperatures were monitored during the production. The processes are simulated by means of Deform 3D fully coupled simulations. and the results compared with the experimental ones. The profile are characterized by means of tensile tests in order to evaluate strength and deformability of the joints, and the results are related to the welding parameters as they were obtained by FEM. Finally, the die stress is investigated in order to explain tool life behaviour of the dies as it was observed during their whole life.

Donati, L.; Tomesani, L.

2007-04-01

475

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

NASA Astrophysics Data System (ADS)

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 large elastoplastic strains (in particular the thickness strains) encountered in deep drawing operations. Our results will be presented and compared with others, obtained either from experiments or from incremental codes such as ABAQUS or STAMPACK. The presentation includes "math based" optimization algorithms and strategies for process parameter design. The cost functions and constraints are mainly express to reduce or control the thickness changes, the localized necking, the wrinkling tendency, the springback effects after forming. The design variables are describing the shape of the blank and the tools, the restraining forces due to drawbeads, material properties such as anisotropy coefficient and hardening exponent. Results will be presented to show the actual capabilities of the coupled analysis and optimization strategy with application to the design of stamping parameters.

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

2007-04-01

476

Predictions of the Mechanical Properties and Microstructure Evolution of High Strength Steel in Hot Stamping  

NASA Astrophysics Data System (ADS)

Hot stamping is an innovative operation in metal-forming processes which virtually avoids the cracking and wrinkling of high strength steel (HSS) sheets. Examining the phase transformation and mechanical properties of HSS by means of experiments is challenging. In this article, a numerical model of the hot stamping process including forming, quenching, and air cooling was developed to reveal the microstructure evolution and to predict the final mechanical properties of hot-stamped components after multi-process cycles. The effects of the number of process cycles and the holding times on the temperature of HSS were examined using the model. The microstructure evolution of HSS under variable holding times is illustrated. The mechanical properties, particularly hardness and tensile strength, were predicted. It was found that the martensitic content increased with increasing holding time, and the martensitic content of the formed component at the flange and end was higher than for the sidewall, and lowest for the bottom. The hardness trend was consistent with the martensitic content. After six process cycles, the predictive errors of the model for hardness and tensile strength were acceptable for practical applications in engineering. Comparison between the predicted results and the experiment results showed that the developed model was reliable.

Cui, Junjia; Lei, Chengxi; Xing, Zhongwen; Li, Chunfeng; Ma, Shumei

2012-11-01

477

Fabrication of 3D high aspect ratio PDMS microfluidic networks with a hybrid stamp.  

PubMed

We report a novel methodology for fabricating large-area, multilayer, thin-film, high aspect ratio, 3D microfluidic structures with through-layer vias and open channels that can be bonded between hard substrates. It is realized by utilizing a hybrid stamp with a thin plastic sheet embedded underneath a PDMS surface. This hybrid stamp solves an important edge protrusion issue during PDMS molding while maintaining necessary stamp elasticity to ensure the removal of PDMS residues at through-layer regions. Removing edge protrusion is a significant progress toward fabricating 3D structures since high aspect ratio PDMS structures with flat interfaces can be realized to facilitate multilayer stacking and bonding to hard substrates. Our method also allows for the fabrication of 3D deformable channels, which can lead to profound applications in electrokinetics, optofluidics, inertial microfluidics, and other fields where the shape of the channel cross section plays a key role in device physics. To demonstrate, as an example, we have fabricated a microfluidic channel by sandwiching two 20 ?m wide, 80 ?m tall PDMS membranes between two featureless ITO glass substrates. By applying electrical bias to the two ITO substrates and pressure to deform the thin membrane sidewalls, strong electric field enhancement can be generated in the center of a channel to enable 3D sheathless dielectrophoretic focusing of biological objects including mammalian cells and bacteria at a flow speed up to 14 cm s(-1). PMID:25710255

Kung, Yu-Chun; Huang, Kuo-Wei; Fan, Yu-Jui; Chiou, Pei-Yu

2015-03-31

478

Evaluation of resistless Ga+ beam lithography for UV NIL stamp fabrication  

NASA Astrophysics Data System (ADS)

This paper presents an alternative rapid prototyping approach for the fabrication of stamps for UV nanoimprint lithography. In this process, areas implanted with gallium serve as an etch mask for the dry etching of quartz. The implantation is performed using a focused ion beam system. To avoid charging of the quartz substrate the use of thin layers of chromium or carbon on the quartz substrate has been evaluated. The resulting quartz structures exhibit very smooth surfaces after dry etching, if the implantation dose is high enough to form a stable etch mask. Furthermore, anisotropic etching could be realized by optimization of a quartz etching process involving C4F8 and O2 after the use of resistless Ga+ beam lithography. Finally, imprints into a UV curing resist are performed successfully with the manufactured stamps, proving that the presence of Ga rich areas on the stamp is not detrimental to the curing of the resist or the functionality of the anti-sticking layer.

Rumler, M.; Fader, R.; Haas, A.; Rommel, M.; Bauer, A. J.; Frey, L.

2013-09-01

479

Prediction of Proper Temperatures for the Hot Stamping Process Based on the Kinetics Models  

NASA Astrophysics Data System (ADS)

Nowadays, the application of kinetics models for predicting microstructures of steels subjected to thermo-mechanical treatments has increased to minimize direct experimentation, which is costly and time consuming. In the current work, the final microstructures of AISI 4140 steel sheets after the hot stamping process were predicted using the Kirkaldy and Li kinetics models combined with new thermodynamically based models in order for the determination of the appropriate process temperatures. In this way, the effect of deformation during hot stamping on the Ae3, Acm, and Ae1 temperatures was considered, and then the equilibrium volume fractions of phases at different temperatures were calculated. Moreover, the ferrite transformation rate equations of the Kirkaldy and Li models were modified by a term proposed by Åkerström to consider the influence of plastic deformation. Results showed that the modified Kirkaldy model is satisfactory for the determination of appropriate austenitization temperatures for the hot stamping process of AISI 4140 steel sheets because of agreeable microstructure predictions in comparison with the experimental observations.

Samadian, P.; Parsa, M. H.; Mirzadeh, H.

2015-02-01

480

Probabilistic Design in a Sheet Metal Stamping Process under Failure Analysis  

SciTech Connect

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 a mild steel for a wheelhouse used in automobile industry is studied by using an explicit nonlinear finite element code and incorporating failure analysis (tearing and wrinkling) and design under uncertainty. Margins of tearing and wrinkling are quantitatively defined via stress-based criteria for system-level design. The forming process utilizes drawbeads instead of using the blank holder force to restrain the blank. The main parameters of interest in this work are friction conditions, drawbead configurations, sheet metal properties, and numerical errors. A robust design model is created to conduct a probabilistic design, which is made possible for this complex engineering process via an efficient uncertainty propagation technique. The method called the weighted three-point-based method estimates the statistical characteristics (mean and variance) of the responses of interest (margins of failures), and provide a systematic approach in designing a sheet metal forming process under the framework of design under uncertainty.

Buranathiti, Thaweepat; Cao, Jian; Chen, Wei [Department of Mechanical Engineering, Northwestern University, Evanston, Illinois 60208 (United States); Xia, Z. Cedric [Ford Scientific Research Laboratory, Dearborn, Michigan 48121 (United States)

2005-08-05

481

Martensitic microstructural transformations from the hot stamping, quenching and partitioning process  

SciTech Connect

Hot stamping, which combines forming and quenching in one process, produces high strength steels with limited ductility because the quenching is uncontrolled. A new processing technique has been proposed in which the hot stamping step is followed by a controlled quenching and partitioning process, producing a microstructure containing retained austenite and martensite. To investigate this microstructure, specimens were heated at a rate of 10 deg. C/s to the austenitizing temperature of 900 deg. C, held for 5 min to eliminate thermal gradients, and cooled at a rate of 50 deg. C/s to a quenching temperature of 300 deg. C, which is between the martensite start temperature and the martensite finish temperatures. The resulting microstructure was examined using optical microscope, scanning electron microscopy and transmission electron microscopy. The material produced contains irregular, fragmented martensite plates, a result of the improved strength of the austenite phase and the constraints imposed by a high dislocation density. - Research Highlights: {yields} A novel heat treatment of advanced high strength steels is proposed. {yields} The processing technique is hot stamping plus quenching and partitioning process. {yields} The material produced contains irregular, fragmented martensite plates. {yields} The reason is strength of austenite phase and constraint of dislocation density.

Liu Heping [School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240 (China); Jin Xuejun, E-mail: jin@sjtu.edu.cn [School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240 (China); Dong Han; Shi Jie [Central Iron and Steel Research Institute, Beijing 100081 (China)

2011-02-15

482

Prediction of Forming Limit Diagrams for 22MnB5 in Hot Stamping Process  

NASA Astrophysics Data System (ADS)

Hot stamping of ultra-high strength steels possesses many superior characteristics over conventional room temperature forming process and is fairly attractive in improving strength and reducing weight of vehicle body product. However, the mechanical and failure behavior of hot stamping boron steel 22MnB5 are both strongly affected by strain hardening, temperature, strain rate, and microstructure. In this paper, the material yield and flow behavior of 22MnB5 within the temperature and strain rate range of hot stamping are described by an advanced anisotropic yield criterion combined with two different hardening laws. The elevated temperature forming limit diagram (ET-FLD) is constructed using the M-K theoretical analysis. The developed model was validated by comparing our predicted result with experimental data in the literature under isothermal conditions. Based on the verified model, the influence of temperature and strain rate on the forming limit curve for 22MnB5 steel under equilibrium isothermal condition are discussed. Furthermore, the transient forming limit diagram is developed by performing a transient forming process simulation under non-isothermal transient condition.

Li, Hongzhou; Wu, Xin; Li, Guangyao

2013-08-01

483

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

SciTech Connect

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{sub S}TAMP, for an efficient estimation of the large elastoplastic strains (in particular the thickness strains) encountered in deep drawing operations. Our results will be presented and compared with others, obtained either from experiments or from incremental codes such as ABAQUS or STAMPACK. The presentation includes 'math based' optimization algorithms and strategies for process parameter design. The cost functions and constraints are mainly express to reduce or control the thickness changes, the localized necking, the wrinkling tendency, the springback effects after forming. The design variables are describing the shape of the blank and the tools, the restraining forces due to drawbeads, material properties such as anisotropy coefficient and hardening exponent. Results will be presented to show the actual capabilities of the coupled analysis and optimization strategy with application to the design of stamping parameters.

Batoz, Jean-Louis; Naceur, Hakim [Universite de Technologie de Compiegne, BP 60319, 60203 Compiegne (France); Guo Yingqiao [Universite de Reims Champagne-Ardenne, BP 1039, 51687 Reims (France)

2007-04-07

484

Linkping University Electronic Press  

E-print Network

short-term goal of LiU E-Press is to parallel publish the full-text of all allowed peer). Additionally there are 34 conference proceeding, four peer-reviewed journals, 19 report series and six in the publication database come from either LiU or the University Hospital. Those that download documents from LiU E

Zhao, Yuxiao

485

Public Relations Press Release  

E-print Network

Public Relations Department Page 1/2 Press Release Sialic acid shields human cells from attack the enemy ­ bacteria or other invaders ­ from cells of its own body. To achieve this distinction, the immune system utilizes characteristic molecular patterns displayed on the surface of each cell. One

Grust, Torsten

486

Public Relations Press release  

E-print Network

Public Relations Department Page 1/4 Press release Extinct form of Tuberculosis identified Tübingen with humans in Africa, and spread from there tens of thousands of years ago following major human migrations. Tuberculosis strains in the New World today are closely related to European forms, implying an introduction

Ould Ahmedou, Mohameden

487

Drill Press Work Sample.  

ERIC Educational Resources Information Center

This manual contains a work sample intended to assess a handicapped student's interest in and to screen interested students into a training program in basic machine shop I. (The course is based on the entry level of the drill press operator.) Section 1 describes the assessment, correlates the work performed and worker traits required for…

Shawsheen Valley Regional Vocational-Technical High School, Billerica, MA.

488

Optically Aligned Drill Press  

NASA Technical Reports Server (NTRS)

Precise drill press equipped with rotary-indexing microscope. Microscope and drill exchange places when turret rotated. Microscope axis first aligned over future hole, then rotated out of way so drill axis assumes its precise position. New procedure takes less time to locate drilling positions and produces more accurate results. Apparatus adapted to such other machine tools as milling and measuring machines.

Adderholdt, Bruce M.

1994-01-01

489

The thermal fatigue resistance of H-13 Die Steel for aluminum die casting dies  

NASA Technical Reports Server (NTRS)

The effects of welding, five selected surface coatings, and stress relieving on the thermal fatigue resistance of H-13 Die Steel for aluminum die casting dies were studied using eleven thermal fatigue specimens. Stress relieving was conducted after each 5,000 cycle interval at 1050 F for three hours. Four thermal fatigue specimens were welded with H-13 or maraging steel welding rods at ambient and elevated temperatures and subsequently, subjected to different post-weld heat treatments. Crack patterns were examined at 5,000, 10,000, and 15,000 cycles. The thermal fatigue resistance is expressed by two crack parameters which are the average maximum crack and the average cracked area. The results indicate that a significant improvement in thermal fatigue resistance over the control was obtained from the stress-relieving treatment. Small improvements were obtained from the H-13 welded specimens and from a salt bath nitrogen and carbon-surface treatment. The other surface treatments and welded specimens either did not affect or had a detrimental influence on the thermal fatigue properties of the H-13 die steel.

1982-01-01

490

Non-isothermal analysis of die corner gap formation for materials deformed by multi-pass ECAP  

NASA Astrophysics Data System (ADS)

In this paper, the upper-bound solutions proposed by Eivani and Karimi Taheri [Comp. Mater. Sci. 42 (2008) 14] to calculate processing force and evaluate die corner angle ? formation in terms of tribology and die configurations during cold single pass equal channels angular pressed metals with constant flow stress were extended to work-hardening metals processed by two passes according to route A by using the Swift model combined to von Mises isotropic plasticity criterion. Also, adiabatic heat equation was coupled to solutions to express the final temperature of the workpiece. For that, thermomechanical properties of a hot-dip galvanized interstitial-free (IF) were considered and its behavior under pressing was evaluated to non-hardening and work-hardening conditions in all performed analyses. By including work-hardening in the models and for the critical friction factor of 0.4, theoretical predictions after single pass showed a decreasing of die corner angle and pressing force predictions and increasing of effective plastic strain and end temperature for all friction conditions and tooling geometries evaluated. In addition, after second pass, these responses showed higher values. Finally, with the proposed upper-bound models it was possible to analyze the dependency of angle ?, effective plastic strain, pressing load and sample temperature with the instantaneous workpiece height at the entry surface of deformation zone.

Medeiros, N.; Moreira, L. P.

2014-08-01

491

Die Verdienste Leonhard Eulers um den Potentialbegriff  

Microsoft Academic Search

Zusammenfassung Im Anschluß an die Arbeit Edm. Hoppes über „Prioritätsfragen“ (22. Band, 6. Heft dieser Zeitschrift) wird die Einführung des Potentialbegriffes behandelt und der Prioritätsnachweis erbracht, daß weder Lagrange noch Laplace, sondern Euler der eigentliche Begründer der Potentialtheorie ist.

Rudolf Brenneke

1924-01-01

492

Fabrication process analysis and experimental verification for aluminum bipolar plates in fuel cells by vacuum die-casting  

NASA Astrophysics Data System (ADS)

There are various methods for the fabrication of bipolar plates, but these are still limited to machining and stamping processes. High-pressure die casting (HPDC) is an ideal process for the manufacture of bipolar plates This study aims to investigate the formability of bipolar plates for polymer electrolyte membrane fuel cells (PEMFCs) fabricated by vacuum HPDC of an Al-Mg alloy (ALDC6). The cavity of the mold consisted of a thin-walled plate (200 mm × 200 mm × 0.8 mm) with a layer of serpentine channel (50 mm × 50 mm). The location and direction of the channel in the final mold design was determined by computational simulation (MAGMA soft). In addition, simulation results for different conditions of plunger stroke control were compared to those from actual die-casting experiments. Under a vacuum pressure of 35 kPa and for injection speeds of 0.3 and 2.5 m s-1 in the low and high speed regions, respectively, the samples had few casting defects. In addition, the hardness was higher and porosity in microstructure was less than those of the samples made under other injection speed conditions. In case of thin-walled plates, vacuum die casting is beneficial in terms of formability compared to conventional die casting.

Jin, Chul Kyu; Kang, Chung Gil

2011-10-01

493

Lufthansa: Mit Employer Branding die Richtigen finden  

Microsoft Academic Search

\\u000a Die Gewinnung und Auswahl der richtigen Mitarbeiter ist ein entscheidender Wettbewerbsvorteil für jedes Unternehmen – auch\\u000a für Lufthansa. Relevante Erfolgsfaktoren sind die Pflege oder die Stärkung der Arbeitgebermarke, Wirtschaftlichkeit, entsprechendes\\u000a Kostenmanagement und die nachhaltige Etablierung von Standardprozessen. Personalmarketer stehen dabei in einem Spannungsfeld\\u000a zwischen dem Qualitätsanspruch der personalsuchenden Fachbereiche („more specific“ und „best available“), dem viel zitierten\\u000a „(New) War for

Doris Krüger

494

Should assisted dying be legalised?  

PubMed Central

When an individual facing intractable pain is given an estimate of a few months to live, does hastening death become a viable and legitimate alternative for willing patients? Has the time come for physicians to do away with the traditional notion of healthcare as maintaining or improving physical and mental health, and instead accept their own limitations by facilitating death when requested? The Universities of Oxford and Cambridge held the 2013 Varsity Medical Debate on the motion “This House Would Legalise Assisted Dying”. This article summarises the key arguments developed over the course of the debate. We will explore how assisted dying can affect both the patient and doctor; the nature of consent and limits of autonomy; the effects on society; the viability of a proposed model; and, perhaps most importantly, the potential need for the practice within our current medico-legal framework. PMID:24423249

2014-01-01

495

Fluxless die bonding for optoelectronics  

Microsoft Academic Search

Two new approaches are described for epi-down die bonding of diode lasers. The first approach, based on an acetic acid vapor flux, eliminates complications associated with the use of liquid flux in optoelectronic packaging. Based on this approach, InGaAsP\\/InP laser arrays were soldered onto silicon substrates. These laser arrays, which were passively aligned to single-mode optical fibers on the silicon

R. Boudreau; M. Tabasky; C. Armiento; A. Bellows; V. Cataldo; R. Morrison; M. Urban; R. Sargent; A. Negri; P. Haugsjaa

1993-01-01

496

Racing Game with One Die  

NSDL National Science Digital Library

This interactive applet allows students to discover how probability can influence the outcome of a game. Learners control the winning and losing outcomes on a single die in a race between two cars. Data can be generated for individual rolls and races, or can be accumulated for any number of races. This game enables students to gain a deeper understanding of theoretical and experimental probability. Help tips for users and exploration questions for educators are provided.

2012-01-01

497

Die Aufklärungspflicht in der Notfallmedizin  

Microsoft Academic Search

Zusammenfassung  Die Aufklärungspflicht vor medizinischen Maßnahmen trifft neben Ärzten auch Angehörige der anderen Medizinberufe. Sie gilt\\u000a grundsätzlich in der präklinischen wie der innerklinischen Notfallmedizin und hat im persönlichen Gespräch zu erfolgen. Auch\\u000a eine indizierte und kunstgerecht durchgeführte Therapie ist zivilrechtlich prinzipiell rechtswidrig und kann Schadenersatzansprüche\\u000a begründen, wenn der Patient mangels ausreichender Aufklärung nicht rechtswirksam einwilligen konnte. Es gibt keine gesetzliche\\u000a Regelung

S. Koppensteiner; D. Lippert; Springer Medizin; Bezirksgericht Neunkirchen; Karl Landsteiner

2009-01-01

498

Die Zwischenwirte Von Davainea Proglottina (Cestoidea)  

Microsoft Academic Search

Mehreren tausend Nackt- und Gehäuseschnecken, die zu 17 Arten gehören, wurden Proglottiden von Davainea proglottina verabreicht. Aus der Empfänglichkeit, Häufigkeit des Auftretens und der Lebensweise der geprüften Schneckenarten ergibt sich, daß nur die Limacidae und hier wiederum die Derocerasarten eine Rolle als Zwischenwirte dieses Bandwurmes spielen. Aus dieser Familie wurden von uns zum ersten Mal folgende Arten als Zwischenwirte festgestellt:

K. Enigk; E. Sticinsky; H. Ergün

1958-01-01

499

Die Bedeutung von Abhngigkeitsstrukturen in der  

E-print Network

ab Die Bedeutung von Abhängigkeitsstrukturen in der Rückversicherung Dresdner Versicherungsforum ­ 23. Juni 2006 Dr. Ekkehard Kessner #12;Seite 2 ab Abhängigkeiten von Risiken Die Kenntnis über ursächliche oder statistisch belegbare Abhängigkeiten von Risiken ist von Bedeutung für die

Schmidt, Klaus D.

500

Die Absorptionsspektren von Vanadium, Titan und Scandium  

Microsoft Academic Search

Zusammenfassung Unter Benutzung eines elektrischen Ofens nach dem Muster der Öfen von A. King werden die Absorptionslinien der Dämpfe von Vanadium, Titan und Scandium bei 20000 C ermittelt. Die quantentheoretische Deutung dieser Ergebnisse gelingt unter Benutzung der bisher bekannten Gesetzmäßigkeiten in den Bogenspektren dieser Elemente, die einer kritischen Durchsicht unterzogen und insbesondere bei Titan durch Angabe neuer Multipletts vervollständigt werden.

H. Gieseler; W. Grotrian

1924-01-01