WorldWideScience

Sample records for classical stamping progression

  1. Optimization of a Classical Stamping Progression by Modal Correction of Anisotropy Ears

    CERN Document Server

    Ledoux, Y; Samper, Serge; 10.1115/1.2769730

    2010-01-01

    This work is a development from the Inetforsmep European project. We proposed to realize a global optimization of a deep drawing industrial progression (made of several stages) for a cup manufacture. The objectives of the process were the thickness decrease and the geometrical parameters (especially the height). This paper improves on this previous work in the aim of mastering the contour error. From the optimal configuration, we expect to cut down the amount of the needed material and the number of forming operations. Our action is focused on the appearance of unexpected undulations (ears) located on the rim of the cups during forming due to a nonuniform crystallographic texture. Those undulations can cause a significant amount of scraps, productivity loss, and cost during manufacture. In this paper, this phenomenon causes the use of four forming operations for the cup manufacture. The aim is to cut down from four to two forming stages by defining an optimal blank (size and shape). The advantage is to reduce...

  2. Comparison of spectacle classical progressive and office progressive lenses.

    Science.gov (United States)

    Kozlík, Marek; Knollová, Libuse Nováková

    2013-04-01

    This paper elaborates on analysis of progressive spectacle lenses, to correct presbyopia, which are nowadays offered at the market. The paper describes different types of progressive lenses, their parameters, length and width of their progressive segments. It also describes degressive spectacles lenses--progressive lenses on middle and near distance. The main part of the paper is a comparison of functional differences among different types of progressive spectacles lenses. The paper also addresses correctness of choice of progressive lenses for different works and professions. Lastly, it elaborates on differences of centration of different types of progressive lenses and parameters for correct choice of glasses frame for progressive spectacles lenses. PMID:23837232

  3. Comparison of Spectacle Classical Progressive and Office Progressive Lenses

    OpenAIRE

    Kozlík, Marek; Nováková Knollová, Libuše

    2013-01-01

    This paper elaborates on analysis of progressive spectacle lenses, to correct presbyopia, which are nowadays offered at the market. The paper describes different types of progressive lenses, their parameters, length and width of their progressive segments. It also describes degressive spectacles lenses – progressive lenses on middle and near distance. The main part of the paper is a comparison of functional differences among different types of progressive spectacles lenses. The paper also add...

  4. ANCIENT BREAD STAMPS FROM JORDAN

    OpenAIRE

    Kakish, Randa

    2014-01-01

    Marking bread was an old practice performed in different parts of the old world. It was done for religious, magical, economic and identification purposes. Bread stamps differ from other groups of stamps. Accordingly, the aim of this article is to identify such stamps, displayed or stored, in a number of Jordanian Archaeological Museums. A col-lection of twelve ancient bread stamps were identified and studied. Two of the stamps were of unknown provenance while the others came from al-Shuneh, D...

  5. Stamp in honour of CERN

    CERN Multimedia

    1966-01-01

    21 February 1966. The Swiss post office issued a stamp in CERN's honour. This stamp showed the flags of the thirteen Member States at the time arranged in the geometrical outline of Switzerland against a background of a track photograph.

  6. Nanofabrication with molds & stamps

    Directory of Open Access Journals (Sweden)

    Byron D. Gates

    2005-02-01

    Full Text Available A number of methods can be used to fabricate patterns with features having dimensions <100 nm. These techniques, however, can require specialized equipment and are often restricted to a cleanroom environment. Nanofabrication can be made accessible to multiple users by using elastomeric molds or stamps to transfer high-resolution patterns into other materials. These techniques are inexpensive and can transfer patterns into functional materials and onto a number of surfaces. This review describes recent advances in fabricating nanostructures using these techniques.

  7. Post Stamp Perforation Recognition

    OpenAIRE

    Koníček, Vladimír

    2008-01-01

    Rozpoznávání zoubkování poštovních známek je důležitým faktorem při posuzování pravosti poštovní známky. Typ a rozměr zoubkování mají výrazný vliv na cenu poštovní známky. Tato práce se zabývá navrhem detektoru zoubkování poštovních známek. Cílem práce je vytvořit aplikaci, která z fotografie určí zoubkování zobrazené poštovní známky. Aplikace pro práci s obrazy využívá knihovnu OpenCV. Post stamp perforation recognition is important factor in authentication of post stamps. Type and perfor...

  8. Special Stamps:Antarctic Scenery

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    In July 2002, the State Postal Bureau issued a set of three stamps, whose theme is Antarctic scenery.The first stamp depicts an iceberg. Antarctica is where 90 percent of the world’s ice exists. Each year countless icebergs float majestically through the sea, and are a magnificent scenic feature of Antarctica.

  9. Flexible Stamp for Nanoimprint Lithography

    DEFF Research Database (Denmark)

    Nielsen, Theodor; Pedersen, Rasmus H.; Hansen, Ole;

    2005-01-01

    The design, fabrication and performance of a flexible silicon stamp for homogenous large area nanoimprint lithography (NIL) are presented. The flexible stamp is fabricated by bulk semiconductor micro machining of a 4-inch silicon wafer and consists of thick anchor like imprint areas connected...

  10. Fabrication of Nanoimprint stamps for photonic crystals

    Energy Technology Data Exchange (ETDEWEB)

    Kouba, J [BESSY GmbH, Anwenderzentrum fuer Mikrotechnik, Albert-Einstein-Str. 15, 12489 Berlin (Germany); Kubenz, M [Micro resist technology GmbH, Koepenicker Str. 325, 12555 Berlin (Germany); Mai, A [BESSY GmbH, Anwenderzentrum fuer Mikrotechnik, Albert-Einstein-Str. 15, 12489 Berlin (Germany); Ropers, G [BESSY GmbH, Anwenderzentrum fuer Mikrotechnik, Albert-Einstein-Str. 15, 12489 Berlin (Germany); Eberhardt, W [BESSY GmbH, Anwenderzentrum fuer Mikrotechnik, Albert-Einstein-Str. 15, 12489 Berlin (Germany); Loechel, B [BESSY GmbH, Anwenderzentrum fuer Mikrotechnik, Albert-Einstein-Str. 15, 12489 Berlin (Germany)

    2006-04-01

    We report on fabrication of nanoimprint stamps for fabrication of two dimensional photonic crystals in visible range of spectra. Nanoimprint stamps made of silicon and/or nickel were successfully fabricated using electron beam lithography and advanced dry etching techniques. The quality of the stamps was evaluated using scanning electron microscopy. The fabricated stamps were also evaluated by imprinting them into suitable polymer materials.

  11. Investment Channels Stamp Markets in Turbulence

    Institute of Scientific and Technical Information of China (English)

    LIU BO

    2006-01-01

    @@ "Iwill close my store for a couple of weeks,"says a stamp trader at Beijing's Dazhongsi market,the largest stamp exchange center in Asia. The summer is traditionally a low season for the stamp market, but with the added popularity of the 2006 World Cup, the purchase of stamps has taken a back seat on most people's to-do lists.

  12. Stamping Robust Design Method and Its Application

    Institute of Scientific and Technical Information of China (English)

    Z.Q. Lin; Jian Ai; Weigang Zhang; Shuhui Li

    2004-01-01

    The application of the robust design to stamping is discussed in the paper. The regression equation of the quality index and its influencing factors can be attained by using method of central composite design. Stamping computer simulation takes the place of real stamping experiments to fulfill the special experimental conditions. The real stamping experiments prove the correctness and the feasibility of the stamping robust design method-central composite design.

  13. Automotive stamped part fatigue design

    OpenAIRE

    Caudoux Mélanie; Facchinetti Matteo Luca; Raynal Renaud

    2014-01-01

    Fatigue design of automotive axle parts is of prior concern because of these are high safety parts and they are expected to drive the overall vehicle mass reduction. In this framework, the stamping process is widely used to form axle parts, before assembling them by welding. Consequently, the mechanical and physical characteristics of the blank sheet are modified, having a strong influence on the fatigue behavior. In this paper, we address the consequences of the stamped process on the fatigu...

  14. The 30P(p, γ31S reaction in classical novae: progress and prospects

    Directory of Open Access Journals (Sweden)

    C. Wrede

    2014-01-01

    Full Text Available The unknown thermonuclear rate of the 30P(p, γ31S reaction at classical-nova temperatures currently prohibits the accurate modeling of nova nucleosynthesis in the A ⩾ 30 region. This is hindering the calibration of nova thermometers based on observed O/S, S/Al, O/P, and P/Al abundance ratios in nova ejecta, the calibration of a meter to probe mixing at the core-envelope interface in novae based on the observed Si/H abundance ratio, and the identification of candidate pre-solar nova grains found in primitive meteorites based on laboratory measurements of their 30Si/28Si isotopic ratios. Each of these diagnostics could address key questions in our understanding of classical novae if the 30P(p, γ31S rate were known. We review progress on the determination of the 30P(p, γ31S rate leading to a critical assessment of current interpretations of published data and prospects for future work.

  15. Electronic Seal Stamping Based on Group Signature

    OpenAIRE

    Girija Srikanth

    2011-01-01

    This paper describes a new electronic official seal stamping based on Group Signature, USB Key. Bill/Contract in E-commerce must be seal stamped to gain tamper proof and non-repudiation. The seal stamping control is designed based on the certificate-based public key. This technique is more efficient for generating and verifying individual/group signatures in terms of computational efforts and communication costs. Web page electronic seal-stamping system is implemented which has been adopted b...

  16. Stamp Verification for Automated Document Authentication

    DEFF Research Database (Denmark)

    Micenková, Barbora; van Beusekom, Joost; Shafait, Faisal

    Stamps, along with signatures, can be considered as the most widely used extrinsic security feature in paper documents. In contrast to signatures, however, for stamps little work has been done to automatically verify their authenticity. In this paper, an approach for verification of color stamps is...

  17. Automotive stamped part fatigue design

    Directory of Open Access Journals (Sweden)

    Caudoux Mélanie

    2014-06-01

    Full Text Available Fatigue design of automotive axle parts is of prior concern because of these are high safety parts and they are expected to drive the overall vehicle mass reduction. In this framework, the stamping process is widely used to form axle parts, before assembling them by welding. Consequently, the mechanical and physical characteristics of the blank sheet are modified, having a strong influence on the fatigue behavior. In this paper, we address the consequences of the stamped process on the fatigue design and how they may be effectively taken into account in the automotive industry. Actually, the coupling between the stamping process and the fatigue design is under development at PSA Peugeot Citroën Company since several years. Such an analysis deals with some major topics: thickness variation, plastic hardening and deformation, and residual stress. All of these ingredients result in fatigue criteria evolutions: it is important to stress that the stamping process can have advantageous or disadvantageous consequences on the fatigue design. This is here highlighted on some examples, dealing with front and rear axles.

  18. Special Stamps:Qinghai Lake

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    On July 20, 2002, the State Postal Bureau issued a set of three stamps picturing the Qinghai Lake shore, Bird Island, and the distant view.Located on the northeastern Qinghai-Tibet Plateau, in West China’s Qinghai Province, Qinghai Lake is 3,196 meters above sea level, and the biggest inland lake in China. Oils have been used to capture its magnificence.Bird Island on Qinghai Lake is a

  19. Research progress on classical swine fever%猪瘟研究新进展

    Institute of Scientific and Technical Information of China (English)

    卫广森

    2004-01-01

    猪瘟(Hog cholera or Classical Swine fever,CSF)是由猪瘟病毒(Hog cholera virus or Classical Swine fever Virus,CSFV)引起猪的一种高度接触性传染病。其流行广泛,发病率高,死亡率高。1984年世界动物卫生组织(OIE)将其列为A类传染病,我国也将此病列为一类动物疫病。

  20. Electronic Seal Stamping Based on Group Signature

    Directory of Open Access Journals (Sweden)

    Girija Srikanth

    2011-05-01

    Full Text Available This paper describes a new electronic official seal stamping based on Group Signature, USB Key. Bill/Contract in E-commerce must be seal stamped to gain tamper proof and non-repudiation. The seal stamping control is designed based on the certificate-based public key. This technique is more efficient for generating and verifying individual/group signatures in terms of computational efforts and communication costs. Web page electronic seal-stamping system is implemented which has been adopted by CNBAB platform since Mar., 2008

  1. The STAMP Software for State Space Models

    Directory of Open Access Journals (Sweden)

    Roy Mendelssohn

    2011-05-01

    Full Text Available This paper reviews the use of STAMP (Structural Time Series Analyser, Modeler and Predictor for modeling time series data using state-space methods with unobserved components. STAMP is a commercial, GUI-based program that runs on Windows, Linux and Macintosh computers as part of the larger OxMetrics System. STAMP can estimate a wide-variety of both univariate and multivariate state-space models, provides a wide array of diagnostics, and has a batch mode capability. The use of STAMP is illustrated for the Nile river data which is analyzed throughout this issue, as well as by modeling a variety of oceanographic and climate related data sets. The analyses of the oceanographic and climate data illustrate the breadth of models available in STAMP, and that state-space methods produce results that provide new insights into important scientific problems.

  2. Progress in Heterogeneous Photocatalysis: From Classical Radical Chemistry to Engineering Nanomaterials and Solar Reactors.

    Science.gov (United States)

    Teoh, Wey Yang; Scott, Jason A; Amal, Rose

    2012-03-01

    The field of heterogeneous photocatalysis has expanded rapidly in the last four decades, having undergone various evolutionary phases related to energy and the environment. The two most significant applications of photocatalysis are geared toward solar water splitting and the purification of air and water. Notably, the interdisciplinary nature of the field has increased significantly, incorporating semiconductor physics, surface sciences, photo and physical chemistry, materials science, and chemical engineering. Whereas this forms the basis on which the field continues to grow, adequate bridging of multidisciplinary knowledge remains essential. By recalling some of the classical fundamentals of photocatalysis, this Perspective provides contemporary views on heterogeneous photochemical conversion, encompassing charge transport characteristics, radical chemistry and organic degradation mechanisms, photocatalyst design, and photoreactor engineering.

  3. [Research Progress in the Core Proteins of the Classical Swine Fever Virus].

    Science.gov (United States)

    Hou, Yuzhen; Zhao, Dantong; Liu, Guoying; He, Fan; Liu, Bin; Fu, Shaoyin; Hao, Yongqing; Zhang, Wenguang

    2015-09-01

    The core protein (CP) of the classical swine fever virus (CSFV) is one of its structural proteins. Apart from forming the nucleocapsid to protect internal viral genomic RNA, this protein is involved in transcriptional regulation. Also, during viral infection, the CP is involved in interactions with many host proteins. In this review, we combine study of this protein with its disorders, structural/functional characteristics, as well as its interactions with the non-structural proteins NS3, NS5B and host proteins such as SUMO-1, UBC9, OS9 and IQGAP1. We also summarize the important part played by the CP in CSFV pathogenicity, virulence and replication of genomic RNA. We also provide guidelines for further studies in the CP of the CSFV. PMID:26738299

  4. 猪瘟疫苗研究进展%Research Progress of the Vaccine of Classical Swine Fever

    Institute of Scientific and Technical Information of China (English)

    胡鸿惠; 娄高明

    2012-01-01

    The current research situation of CSF vaccine is reviewed in this article. The research progress of traditional vaccine and new vaccine is described, which is refer to further research of CSF vaccine. It is also better for controlling CSF and making out immunization programs.%文章综述了国内外猪瘟(classical swine fever,CSF)疫苗的研究现状.对灭活疫苗、弱毒疫苗和新型疫苗的研究情况进行概述,重点阐述了新型疫苗的研究进展,为进一步研究和开发新的猪瘟疫苗、制定良好猪瘟免疫方案有效控制猪瘟提供参考.

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

    Science.gov (United States)

    Ghirardelli, Alyssa; Linares, Amanda; Fong, Amy

    2011-01-01

    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.…

  6. Special Stamps:Historical Relic Beacons

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    In May 2002, the State Postal Bureau issued a set of five stamps picturing historical relic beacons. They are the Mao Beacon, the Jiangxinyu Twin Beacon, the Huaniaoshan Beacon, the Laotieshan Beacon, and

  7. 7 CFR 916.115 - Lot stamping.

    Science.gov (United States)

    2010-01-01

    ... and Regulations § 916.115 Lot stamping. Except when loaded directly into railway cars, exempted under... inspected in accordance with § 916.55: Provided, That pallets of returnable plastic containers shall...

  8. 7 CFR 917.150 - Lot stamping.

    Science.gov (United States)

    2010-01-01

    ... directly into railway cars, exempted under § 917.143, or for peaches mailed directly to consumers in... returnable plastic containers shall have the lot stamp numbers affixed to each pallet with a...

  9. Stamp Detection in Color Document Images

    DEFF Research Database (Denmark)

    Micenkova, Barbora; van Beusekom, Joost

    2011-01-01

    An automatic system for stamp segmentation and further verification is needed especially for environments like insurance companies where a huge volume of documents is processed daily. However, detection of a general stamp is not a trivial task as it can have different shapes and colors and......, moreover, it can be imprinted with a variable quality and rotation. Previous methods were restricted to detection of stamps of particular shapes or colors. The method presented in the paper includes segmentation of the image by color clustering and subsequent classification of candidate solutions by...... geometrical and color-related features. The approach allows for differentiation of stamps from other color objects in the document such as logos or texts. For the purpose of evaluation, a data set of 400 document images has been collected, annotated and made public. With the proposed method, recall of 83% and...

  10. Time Stamps for Fixed-Point Approximation

    DEFF Research Database (Denmark)

    Damian, Daniela

    2001-01-01

    Time stamps were introduced in Shivers's PhD thesis for approximating the result of a control-flow analysis. We show them to be suitable for computing program analyses where the space of results (e.g., control-flow graphs) is large. We formalize time-stamping as a top-down, fixed......-point approximation algorithm which maintains a single copy of intermediate results. We then prove the correctness of this algorithm....

  11. Stamping SERS for creatinine sensing

    Science.gov (United States)

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

    2015-03-01

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

  12. Stamps of New China: Ancient Villages in Southern Anhui-Special Stamps

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    On June 25, 2004 the State Postal Bureau issued a set of four special stamps entitled “Ancient Villages in Southern Anhui - Xidi and Hongcun Villages.” The stamps depict two ancient villages in Yixian County, southern Anhui Province, which UNESCO added to the World Heritage List on November 30, 2000.

  13. An Unforgettable Stamp Of Mine

    Institute of Scientific and Technical Information of China (English)

    杜永章

    1997-01-01

    【一位澳大利亚的女教师Mrs. Johnston,不远万里,来到中国的涪陵,在那里尽心尽力,一丝不苟地教英语。她已经走了,但是,她的学生没有忘记她,以看似平淡,却含深情:读似稚嫩,其实认真的语言记叙了Mrs. Johnston感人的事迹。从表面看.Mrs.Johnston 似乎没有干出什么惊天动地的伟业.其实.我们这个世界就是在千千万万个人的兢兢业业、默默无闻的工作中而变得越来越美好.读许多名人的传记.我们常常发现.许多名人的成长.常因遇见了一个好的老师.所以.美国的Dorine教授也写道:This student was lucky to have such a teacher!本文一个值得称道之处是:善捕细节。全文以a stamp为线索,一气呵成.标题(An Unforgettable stamp Of Mine)又提纲挈领·文章的可读性大大增强。美国的Dorine教授对此文的评价也不俗:This is another good description of a good Person who obviously Ioved her job and was sincerely interested iu her students.The organization is excellent.and the few errors are merely surface ones .although in at least one case there is some interference,ith comprehensibility.

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

    International Nuclear Information System (INIS)

    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

  15. Progress on technology for detection classical swine fever%猪瘟诊断技术研究进展

    Institute of Scientific and Technical Information of China (English)

    陈江莲

    2012-01-01

    Classical swine fever (CSF) caused by the CSF virus, is an acute, febrile, highly contagious disease in Pigs. Currently, for the complexity of epidemic features, CSF is still a threat to the healthy development of Chinese pig industry. This article summarized the progress on the technology for detection CSF, including etiology methods, serological methods and molecular biological methods, to provide reference for the diagnosis of CSF for farmers.%猪瘟是由猪瘟病毒引起的一种急性、热性、接触性传染病,近年来在我国的流行趋势与发病特点十分复杂,仍是我国养猪业的一大威胁.概述了猪瘟诊断技术的病原学方法、血清学方法和分子生物学方法等的研究进展,为相关养殖人员对猪瘟的诊断提供参考.

  16. Approximation scheme for classical surface plasmas at strong coupling: Progress in the formulation of a dynamical theory

    International Nuclear Information System (INIS)

    A self-consistent approximation scheme is formulated for the calculation of the dynamical linear polarizability of classical electron monolayers. The derivation is carried out in two stages. In the first stage, the authors formulate a simple response function relation linking linear and quadratic polarizabilities; the dynamical coupling function is expressed entirely in terms of the latter. The basic elements in the derivation are the first BBGKY kinetic equation (prepared in the velocity average approximation) and the non-linear fluctuation-dissipation theorem. The new response function relation is exact at zero frequency and exactly satisfies the third frequency moment sum rule. In the second stage, self-consistency is guaranteed by approximating the quadratic polarizability in terms of linear ones. The theory is examined in the weak coupling limit where it is found that a dominant γ-independent non-RPA contribution to the damping is missing. The structure of the missing term is identified at arbitrary coupling strengths. Work is in progress to see how it can be incorporated into the approximation scheme. (author)

  17. UN to lssue Stamps of Chinese Children’s Paintings

    Institute of Scientific and Technical Information of China (English)

    1996-01-01

    A set of stamps designed by Chinese children who took peace as their theme will be issued by the United Nations on October 25, 1996. This will be the first time the United Nations has used children’s paintings in its stamps. The paintings chosen are prize-winners of the Chinese national stamp-designing

  18. E-Commerce-Objected E-Stamp Systems

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Boosting e-stamp's advantages are conduced to promote logistics to go forward and help postal departments to improve the quality of service, many other businesses add-valued can be developed in e-stamp systems. This paper analyzeds, designs e-commerce-objected e-stamp system, and discusseds crucial technologies involved in detail.

  19. Fast thermal nanoimprint lithography by a stamp with integrated heater

    DEFF Research Database (Denmark)

    Tormen, Massimo; Malureanu, Radu; Pedersen, Rasmus Haugstrup;

    2008-01-01

    We propose fast nanoimprinting lithography (NIL) process based on the use of stamps with integrated heater. The latter consists of heavily ion implantation n-type doped silicon layer buried below the microstructured surface of the stamp. The stamp is heated by Joule effect, by 50 μs 25 Hz...

  20. Chemically patterned flat stamps for microcontact printing

    NARCIS (Netherlands)

    Sharpe, Ruben B.A.; Burdinski, Dirk; Huskens, Jurriaan; Zandvliet, Harold J.W.; Reinhoudt, David N.; Poelsema, Bene

    2005-01-01

    Locally oxidized patterns on flat poly(dimethylsiloxane) stamps for microcontact printing were used as a platform for the transfer of a hydrophilic fluorescent ink to a glass substrate. The contrast was found to be limited. These locally oxidized patterns were conversely used as barriers for the tra

  1. Customer Service in the Food Stamp Program

    OpenAIRE

    Michael Ponza; James C. Ohls; Lorenzo Moreno; Amy Zambrowski; Rhoda Cohen

    1999-01-01

    This report finds that the typical Food Stamp client is quite satisfied with services, although misperceptions about eligibility deter many eligible households from participating, and costs to comply with program requirements are significant. Call the Food and Nutrition Service at 703-305-2133 for printed copies.

  2. METAMORPHOSES OF THE ENVIRONMENTAL STAMP IN ROMANIA

    Directory of Open Access Journals (Sweden)

    CARAUS MADALINA

    2015-12-01

    Full Text Available Romania's alignment to European standards is a difficult process with many legislative changes, with direct impact on taxpayers. The necessity of collecting substantial revenues to the State budget, which provide vital economic growth of the Romanian State, loses the substance when we are talking about taxes levied in relation to taxpayer. The environmental stamp, otherwise a controversial tax, represent for the State another way to earn revenue in advance, “as a loan", because in the end it's forced to repay the amounts concerned taxpayers, under the effect of a final and irrevocable court decision. The effects of the legislative changes bring every time complaints both from taxpayers, because they can demand repayment of the environmental stamp only during the period of prescription, as well as on the part of public servants who are grappling with a large volume of work, with the possibility of overcoming the term to handle requests. An equitable solution in solving these distortions would be the inclusion of the environmental stamp within the tax on means of transport, tax that is paid annually by vehicle owners. At the moment the level of the environmental stamp is calculated depending on the CO2 emissions, exhaust emissions and the age of the vehicle. Tax on means of transport is calculated based on engine capacity, an amount determined by CO2 emissions multiplying with each group of 200 cc or fraction on it. Therefore the unification of the two taxes would create a balance for all categories of vehicles.

  3. OrmoStamp mold fabrication via PBW for NIL

    Energy Technology Data Exchange (ETDEWEB)

    Liu, F.; Yao, Y.; Kan, J.A. van, E-mail: phyjavk@nus.edu.sg

    2015-04-01

    Nanoimprint lithography (NIL) is a promising technology that can fabricate structures with high resolution and high throughput. To replicate patterns through NIL, a high quality master mold is needed. A UV patternable inorganic–organic hybrid polymer, OrmoStamp with high resolution is promising for the fabrication of NIL molds. Here, OrmoStamp molds were fabricated by proton beam writing (PBW) in resist followed by OrmoStamp casting. In this paper, different resists (HSQ, PMMA, SU-8 and SML) were evaluated by PBW for OrmoStamp mold fabrication. The results show that HSQ gives the smallest line width down to 30 nm. These lines have subsequently been successfully replicated in OrmoStamp. High aspect ratio structures in OrmoStamp and Ni were obtained from proton beam written resist samples, featuring an aspect ratio of ∼7 and ∼70, respectively. Finally thermal NIL has been demonstrated in PMMA using OrmoStamp molds.

  4. An Optimization Study of Hot Stamping Operation

    Science.gov (United States)

    Ghoo, Bonyoung; Umezu, Yasuyoshi; Watanabe, Yuko; Ma, Ninshu; Averill, Ron

    2010-06-01

    In the present study, 3-dimensional finite element analyses for hot-stamping processes of Audi B-pillar product are conducted using JSTAMP/NV and HEEDS. Special attention is paid to the optimization of simulation technology coupling with thermal-mechanical formulations. Numerical simulation based on FEM technology and optimization design using the hybrid adaptive SHERPA algorithm are applied to hot stamping operation to improve productivity. The robustness of the SHERPA algorithm is found through the results of the benchmark example. The SHERPA algorithm is shown to be far superior to the GA (Genetic Algorithm) in terms of efficiency, whose calculation time is about 7 times faster than that of the GA. The SHERPA algorithm could show high performance in a large scale problem having complicated design space and long calculation time.

  5. Fabrication of Nanoimprint Stamp Using Interference Lithography

    Institute of Scientific and Technical Information of China (English)

    CHEN Xian-Zhong; LI Hai-Ying

    2007-01-01

    Interference lithography is used to fabricate a nanoimprint stamp, which is a key step for nanoimprint lithography.A layer of chromium in thickness of about 20 nm is deposited on the newly cleaned fused silica substrate by thermal evaporation, and a layer of positive resist in thickness of 150nm is spun on the chromium layer. Some patterns,including lines, holes and pillars, are observed on the photoresist film by exposing the resist to interference patterns and they are then transferred to the chromium layer by wet etching. Fused silica stamps are fabricated by reactive ion etching with CHF3/O2 as etchants using the chromium layer as etch mask. An atomic force microscope is used to analyse the pattern transfer in each step. The results show that regular hole patterns of fused silica, with average full width 143 nm at half maximum (FWHM), average hole depth of 76nm and spacing of 450nm, have been fabricated. The exposure method is fast, inexpensive and applicable for fabrication of nanoimprint stamps with large areas.

  6. Chemically patterned flat stamps for microcontact printing.

    Science.gov (United States)

    Sharpe, Ruben B A; Burdinski, Dirk; Huskens, Jurriaan; Zandvliet, Harold J W; Reinhoudt, David N; Poelsema, Bene

    2005-07-27

    Locally oxidized patterns on flat poly(dimethylsiloxane) stamps for microcontact printing were used as a platform for the transfer of a hydrophilic fluorescent ink to a glass substrate. The contrast was found to be limited. These locally oxidized patterns were conversely used as barriers for the transfer of hydrophobic n-octadecanethiol. In this case a good contrast was obtained, but the pattern was found to be susceptible to defects (cracks) in the barrier layer. Local stamp surface oxidation and subsequent modification with 1H,1H,2H,2H-perfluorodecyltrichlorosilane, for use as a barrier in the transfer of n-octadecanethiol, 16-mercaptohexadecanoic acid, and octanethiol, resulted in remarkably good contrast and stable patterns. The improved ink transfer control is ascribed to the reduction of undesired surface spreading and a superior mechanical stability of the stamp pattern. This new approach substantially expands the applicability of microcontact printing and provides a tool for the faithful reproduction of even extremely low filling ratio patterns.

  7. DNA microarray synthesis by using PDMS molecular stamp (II) -- Oligonucleotide on-chip synthesis using PDMS stamp

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Based on the standard phosphoramidites chemistry protocol, two oligonucleotides synthetic routes were studied by contact stamping reactants to a modified glass slide. Route A was a contact coupling reaction, in which a nucleoside monomer was transferred and coupled to reactive groups (OH) on a substrate by spreading the nucleoside activated with tetrazole on a polydimethylsiloxane (PDMS) stamp. Route B was a contact detritylation, in which one nucleoside was fixed on the desired synthesis regions where dimethoxytrityl (DMT) protecting groups on the 5′-hydroxyl of the support-bound nucleoside were removed by stamping trichloroacetic acid (TCA) distributed on features on a PDMS stamp. Experiments showed that the synthetic yield and the reaction speed of route A were higher than those of route B. It was shown that 20 mer oligonucleotide arrays immobilized on the glass slide were successfully synthesized using the PDMS stamps, and the coupling efficiency showed no difference between the PDMS stamping and the conventional synthesis methods.

  8. Tour de France, Giro, Vuelta, and classic European races show a unique progression of road cycling speed in the last 20 years.

    Science.gov (United States)

    El Helou, Nour; Berthelot, Geoffroy; Thibault, Valérie; Tafflet, Muriel; Nassif, Hala; Campion, Frederic; Hermine, Olivier; Toussaint, Jean-François

    2010-05-01

    Road cycling ranks among the most intense endurance exercises. Previous studies and mathematical models describing road cycling have not analysed performances per se. We describe the evolution of road cycling performance over the past 116 years. We studied the top ten cyclists' mean speeds in eight famous classic races and three European Grand Tours, using a previously published multi-exponential model that highlights the different progression periods of an event during the century. In addition, we measured an indicator of difficulty for the Tour de France by calculating the climbing index (i.e. the total altitude climbed over total distance). The eleven races' mean speed increased progressively from 23.13 km . h(-1) in 1892 to 41.19 +/- 2.03 km . h(-1) in 2008. Road cycling development, like other quantifiable disciplines, fits a piecewise progression pattern that follows three periods: before, between, and after the two World Wars. However, a fourth period begins after 1993, providing a speed progression of 6.38% from the third one. The Tour de France's climbing index also provided insight into a recent paradoxical relationship with speeds: when the climbing index increased, the winner's speed also increased. Our results show a major improvement (6.38%) in road cycling performance in the last 20 years and question the role of extra-physiological parameters in this recent progression.

  9. Optimal Nesting for Continuous Shape Stamping Processes

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    This paper discusses the optimal nesting problem for minimizing the scrap in continuous shape stamping processes. The shape sliding technique is used to propose a new approach, OVERLAP-and-ESCAPE, to solve the problem of continuously nesting shapes onto a metal coil of fixed or selectable width. The approach is used to construct the objective function of the mathematical model of the problem using the Simulated Annealing Algorithm to determine the globally minimal configurations for the nesting problems. Some representative cases are studied and the results are encouraging. An automatic nesting software package for manufacturing bicycle chain link blanks is also described.

  10. Study on the Forming Limit Nomogram of Tensile Stamping Operations

    Institute of Scientific and Technical Information of China (English)

    Dachang KANG; Haobin TIAN; Shihong ZHANG

    2004-01-01

    Based on plasticity theory and physical experiments, the quantitative relationships between elongation δ obtained by uniaxial tensile test and forming limits of tensile stamping operations are given, which mainly resolves the problem that forming limits can be derived from simple tensile test. The forming limit nomogram of tensile stamping operations is also established to apply to engineering.

  11. Polymer Stamps for Imprinting Nanopatterns in Polymer Substrate.

    Science.gov (United States)

    Wu, Jiahao; Amirsadeghi, Alborz; Kim, Jinsoo; Park, Sunggook

    2015-01-01

    Using a silicone or metallic stamp for imprinting multiscale patterns comprising micro down to nanoscale patterns into polymer substrates often results in significant deformation in the molded substrate and loss of pattern transfer fidelity for nanopatterns. In the worst case, the expensive stamp can also be damaged. One method to reduce the problem is to use polymer as the stamp material, which will reduce both adhesion and thermal stress generated at the stamp/substrate interface. In this paper, stamps made of three different polymer materials, i.e., polydimethylsiloxane (PDMS), PPGDA-based UV resin and TPGDA-based UV-resin, were fabricated from the same master containing nanofluidic structures and the replication fidelity from the master, polymer stamps, to thermal-imprinted poly(methyl methacrylate) substrate (PMMA) was compared. The largest loss of pattern fidelity occurs in the thermal imprinting step. Polymer stamps with higher Young's moduli result in a better fidelity in pattern transfer. With TPGDA-based UV resin stamps, multiscale structures with a nanochannel with minimum width and height of -70 nm can be imprinted onto PMMA substrate together with macro-scale patterns by a single nanoimprinting processes. PMID:26328384

  12. Appearance traits in fish farming: progress from classical genetics to genomics, providing insight into current and potential genetic improvement.

    Science.gov (United States)

    Colihueque, Nelson; Araneda, Cristian

    2014-01-01

    Appearance traits in fish, those external body characteristics that influence consumer acceptance at point of sale, have come to the forefront of commercial fish farming, as culture profitability is closely linked to management of these traits. Appearance traits comprise mainly body shape and skin pigmentation. Analysis of the genetic basis of these traits in different fish reveals significant genetic variation within populations, indicating potential for their genetic improvement. Work into ascertaining the minor or major genes underlying appearance traits for commercial fish is emerging, with substantial progress in model fish in terms of identifying genes that control body shape and skin colors. In this review, we describe research progress to date, especially with regard to commercial fish, and discuss genomic findings in model fish in order to better address the genetic basis of the traits. Given that appearance traits are important in commercial fish, the genomic information related to this issue promises to accelerate the selection process in coming years. PMID:25140172

  13. Appearance traits in fish farming: progress from classical genetics to genomics, providing insight into current and potential genetic improvement

    Directory of Open Access Journals (Sweden)

    Nelson eColihueque

    2014-08-01

    Full Text Available Appearance traits in fish, those external body characteristics that influence consumer acceptance at point of sale, have come to the forefront of commercial fish farming, as culture profitability is closely linked to management of these traits. Appearance traits comprise mainly body shape and skin pigmentation. Analysis of the genetic basis of these traits in different fish reveals significant genetic variation within populations, indicating potential for their genetic improvement. Work into ascertaining the minor or major genes underlying appearance traits for commercial fish is emerging, with substantial progress in model fish in terms of identifying genes that control body shape and skin colors. In this review, we describe research progress to date, especially with regard to commercial fish, and discuss genomic findings in model fish in order to better address the genetic basis of the traits. Given that appearance traits are important in commercial fish, the genomic information related to this issue promises to accelerate the selection process in coming years.

  14. Authentication, Time-Stamping and Digital Signatures

    Science.gov (United States)

    Levine, Judah

    1996-01-01

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

  15. Teaching Chinese Culture and Language with Postage Stamps

    Institute of Scientific and Technical Information of China (English)

    K.C. Leung

    2000-01-01

    @@ While several articles have long been published on using stamps to teach French,German, and Spanish, I have yet to see one relating to the teaching of Chinese. As a vehicle for communicating a country's current and past values (cultural, political, social, economic,linguistic), stamps can play an important role in the culture and language class -- if only because they stimulate interest and heighten motivation by projecting images of a country's culture,politics, and language. But there is much more: stamps could serve as focal points for a class discussion; they could shed light on government priorities; they could be the subject of cultural quizzes and exercises for language practice; they could be assigned as research subjects. They are, after all, official documents and authentic cultural artifacts themselves. This paper examines the ways in which stamps can serve the teaching of various aspects of culture and language. For the purpose of teaching Chinese, one could use stamps from China, Taiwan, Hong Kong, and Macau. Together, these stamps cover the full range of cultural domains: geography, archaeology,history and politics, language and literature, arts and architecture, science, patterns for daily living,symbolism, myths and culture heroes, etc. I will use these headings in my discussion. Unless otherwise stated, the stamps referred to below were issued in the People's Republic of China (with dates or official serial numbers in brackets).

  16. State waterfowl conservation stamp/print programs considerations for Alaska

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — An Alaska Waterfowl Conservation Stamp program has been proposed in several bills put before the legislature in 1983. The intent of this report is to present a...

  17. Facile stamp patterning method for superhydrophilic/superhydrophobic surfaces

    Energy Technology Data Exchange (ETDEWEB)

    Lyu, Sungnam, E-mail: blueden@postech.ac.kr; Hwang, Woonbong, E-mail: whwang@postech.ac.kr [Department of Mechanical Engineering, POSTECH, Pohang 680-749 (Korea, Republic of)

    2015-11-16

    Patterning techniques are essential to many research fields such as chemistry, biology, medicine, and micro-electromechanical systems. In this letter, we report a simple, fast, and low-cost superhydrophobic patterning method using a superhydrophilic template. The technique is based on the contact stamping of the surface during hydrophobic dip coating. Surface characteristics were measured using scanning electron microscopy and energy-dispersive X-ray spectroscopic analysis. The results showed that the hydrophilic template, which was contacted with the stamp, was not affected by the hydrophobic solution. The resolution study was conducted using a stripe shaped stamp. The patterned line was linearly proportional to the width of the stamp line with a constant narrowing effect. A surface with regions of four different types of wetting was fabricated to demonstrate the patterning performance.

  18. Modeling Blowouts During Drilling Using STAMP and STPA

    OpenAIRE

    Budde, Silje Frost

    2012-01-01

    The focus of this master thesis has been on modeling the risk of blowouts during drilling using System-Theoretic Accident Model and Processes (STAMP) and System-Theoretic Process Analysis (STPA). The world and technology are changing, but these changes are not reflected in our safety engineering approaches. Many of the basic assumptions of traditional techniques no longer hold for complex, high-technical systems being built today. STAMP is a new model based on systems theory rather than relia...

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

    Science.gov (United States)

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

    2014-01-01

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

  20. Classical antiparticles

    Energy Technology Data Exchange (ETDEWEB)

    Costella, J.P.; McKellar, B.H.J.; Rawlinson, A.A.

    1997-03-01

    We review how antiparticles may be introduced in classical relativistic mechanics, and emphasize that many of their paradoxical properties can be more transparently understood in the classical than in the quantum domain. (authors). 13 refs., 1 tab.

  1. Studying classical swine fever virus: making the best of a bad virus.

    Science.gov (United States)

    Ji, Wei; Guo, Zhen; Ding, Nai-Zheng; He, Cheng-Qiang

    2015-02-01

    Classical swine fever (CSF) is a highly contagious and often fatal disease that affects domestic pigs and wild boars. Outbreak of CSF can cause heavy economic losses to the pig industry. The strategies to prevent, control and eradicate CSF disease are based on containing the disease through a systematic prophylactic vaccination policy and a non-vaccination stamping-out policy. The quest for prevention, control and eradication of CSF has moved research forward in academia and industry, and has produced noticeable advances in understanding fundamental aspects of the virus replication mechanisms, virulence, and led to the development of new vaccines. In this review we summarize recent progress in CSFV epidemiology, molecular features of the genome and proteome, the molecular basis of virulence, and the development of anti-virus technologies.

  2. Classical Authentication Aided Three-Stage Quantum Protocol

    OpenAIRE

    Basuchowdhuri, Partha

    2006-01-01

    This paper modifies Kak's three-stage protocol so that it can guarantee secure transmission of information. Although avoiding man-in-the-middle attack is our primary objective in the introduction of classical authentication inside the three-stage protocol, we also benefit from the inherent advantages of the chosen classical authentication protocol. We have tried to implement ideas like key distribution center, session key, time-stamp, and nonce, within the quantum cryptography protocol.

  3. Development of a live attenuated antigenic marker classical swine fever vaccine

    Science.gov (United States)

    Classical Swine Fever, caused by Classical Swine Fever Virus (CSFV), is a highly contagious disease affecting swine worldwide. The two main strategies for disease control are prophylactic vaccination and non-vaccination “stamping out” policies. In a vaccination-to-live strategy, marker vaccines coul...

  4. Polyurethane Molecular Stamps for the in situ Synthesis of DNA Microarray

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Fabrication of polyurethane molecular stamps (PU stamps) based on polypropylene glycol (PPG) and toluene diisocyanate (TDI), using 3, 3(-dichloro-4, 4(-methylenedianiline (MOCA) as the crosslinker, is reported. It was shown from the contact angle measurement that PU stamps surface has good affinity with acetonitrile, guaranteeing the well distribution of DNA monomers on patterned stamps. Laser confocal fluorescence microscopy images of oligonucleotide arrays after hybridization confirmed polyurethane is an excellent material for molecular stamps when transferring polar chemicals and conducting reactions on interfaces by stamping.

  5. 猪瘟病毒E2蛋白研究进展%Application progress in E2 protein of Classical Swine Fever Virus

    Institute of Scientific and Technical Information of China (English)

    江馗语

    2013-01-01

    Classical swine fever(CSF)is a highly contagious, acute, hyperthermic, multi-systemic hemorrhagic viral disease of pigs, which caused by classical swine fe-ver virus(CSFV), a member of the genus Pestivirus of the Flaviviridae. CSF is preva-lent in all continents except North America and Oceania,it is distributed worldwide, and it has relapsed in some European countries(Netherlands, Belgium, Britain, Germa-ny, Italy, Spain, etc.)which had eliminated CSF. Although we have used HCLV vaccine for inoculation for a long time,but CSF still exists in our country and happens from frequency of pandemic into erratic regional dissemination. Latent and persistent in-fection has increased. Therefore, we need clear swine fever virus genome structure and the most research value immunological antigen protein structures to provide a theoretical basis for the development of new and effective vaccines and diagnostic reagents. In this paper,we have reviewed the research progress in genomic structure of CSFV,structure, function, epitopes,expression and applications of E2 protein.%猪瘟(Classical Swine Fever,CSF)是由猪瘟病毒(Classical Swine Fever Virus,CSFV)引起的一种急性、接触性传染病。目前该病流行于除北美洲和大洋洲以外的其他大洲和地区,呈世界性分布,在一些原已宣布消灭猪瘟的欧洲国家(荷兰、比利时、英国、德国、意大利、西班牙等)又相继复发。虽然我国长期坚持全面接种猪瘟兔化弱毒疫苗,但目前猪瘟在我国依然存在,流行特点从以往的频发大面积流行转变为无规律区域性的散发,隐性持续性感染病例增多,因此应明确猪瘟病毒的基因组结构和最具免疫防制研究价值的抗原蛋白结构,为研制新型有效的疫苗和诊断试剂提供理论依据。本文就猪瘟病毒的基因组结构、猪瘟病毒E2蛋白的结构、功能、所包含的抗原表位以及E2蛋白的表达应用等方面的研究进展作以综述。

  6. Can Food Stamps help to reduce Medicare spending on diabetes?

    Science.gov (United States)

    Nicholas, Lauren Hersch

    2011-01-01

    Diabetes is rapidly escalating amongst low-income, older adults at great cost to the Medicare program. We use longitudinal survey data from the Health and Retirement Study linked to administrative Medicare records and biomarker data to assess the relationship between Food Stamp receipt and diabetes health outcomes. We find no significant difference in Medicare spending, outpatient utilization, diabetes hospitalizations and blood sugar (HbA1c) levels between recipients and income-eligible non-recipients after controlling for a detailed set of covariates including individual fixed effects and measures of diabetes treatment compliance. As one-third of elderly Food Stamp recipients are currently diabetic, greater coordination between the Food Stamp, Medicare, and Medicaid programs may improve health outcomes for this group. PMID:21112260

  7. Research on Fuzzy Synthetic Evaluation of Stamping Process Scheme

    Institute of Scientific and Technical Information of China (English)

    JI Tingwei; GAO Jun; ZHAO Guoqun

    2006-01-01

    Stamping process, which is widely used in automobile, aerospace, machine-building industries, and etc., is a creative process needing time and experiences. The lead time is mainly spent on stamping die design and manufacturing. As the basis of die design, process design is a non-linearity and creative process, which can be solved by using the fuzzy synthetic evaluation. In this paper, the potential of fuzzy synthetic evaluation for dealing with stamping process design was explored. The influencing factor set, factor weight set, evaluation set, single factor fuzzy evaluation matrix, and fuzzy synthetic evaluation scheme were studied. Finally, the washer part, considering forming equipment, part dimensions and other factors, was selected to testify the evaluation process.

  8. Time Stamp Synchronization of PEFP Distributed Control Systems

    International Nuclear Information System (INIS)

    Proton Engineering Frontier Project (PEFP) proton linac consists of several types of control systems, such as soft Input Output Controllers (IOC) and embedded IOC based on Experimental Physics Industrial Control System (EPICS) for each subsection of PEFP facility. One of the important factors is that IOC's time clock is synchronized. The synchronized time and time stamp can be achieved with Network Time Protocol (NTP) and EPICS time stamp record without timing hardware. The requirement of the time accuracy of IOCs is less than 1 second. The main objective of this study is to configure a master clock and produce Process Variable (PV) time stamps using local CPU time synchronized from the master clock. The distributed control systems are attached on PEFP control network

  9. Classics Online.

    Science.gov (United States)

    Clayman, Dee L.

    1995-01-01

    Appraises several databases devoted to classical literature. Thesaurus Linguae Graecae (TLG) contains the entire extant corpus of ancient Greek literature, including works on lexicography and historiography, extending into the 15th century. Other works awaiting completion are the Database of Classical Bibliography and a CD-ROM pictorial dictionary…

  10. Classical integrability

    Science.gov (United States)

    Torrielli, Alessandro

    2016-08-01

    We review some essential aspects of classically integrable systems. The detailed outline of the sections consists of: 1. Introduction and motivation, with historical remarks; 2. Liouville theorem and action-angle variables, with examples (harmonic oscillator, Kepler problem); 3. Algebraic tools: Lax pairs, monodromy and transfer matrices, classical r-matrices and exchange relations, non-ultralocal Poisson brackets, with examples (non-linear Schrödinger model, principal chiral field); 4. Features of classical r-matrices: Belavin–Drinfeld theorems, analyticity properties, and lift of the classical structures to quantum groups; 5. Classical inverse scattering method to solve integrable differential equations: soliton solutions, spectral properties and the Gel’fand–Levitan–Marchenko equation, with examples (KdV equation, Sine-Gordon model). Prepared for the Durham Young Researchers Integrability School, organised by the GATIS network. This is part of a collection of lecture notes.

  11. Mecanica Clasica (Classical Mechanics)

    CERN Document Server

    Rosu, H C

    1999-01-01

    First Internet undergraduate course on Classical Mechanics in Spanish (Castellano). This is about 80% of the material I covered during the January-June 1999 semester at IFUG in the Mexican city of Leon. English and Romanian versions are in (slow) progress and hopefully will be arXived. For a similar course on Quantum Mechanics, see physics/9808031

  12. Mecanica Clasica (Classical Mechanics)

    OpenAIRE

    H. C. Rosu

    1999-01-01

    First Internet graduate course on Classical Mechanics in Spanish (Castellano). This is about 80% of the material I covered during the January-June 1999 semester at IFUG in the Mexican city of Leon. English and Romanian versions are in (slow) progress and hopefully will be arXived. For a similar course on Quantum Mechanics, see physics/9808031

  13. The Effect of Food Stamps and Income on Household Food Expenditures

    OpenAIRE

    Levedahl, J. William

    1991-01-01

    This report, reexamining past estimates of tile effect of income and food stamp benefits on food expenditures, finds that a cash-only Food Stamp Program would result in a significant reduction in food expenditures, although smaller than suggested, by some previous results. Most prior studies found spending on food from marginal food stamp benefits to be several times greater than from marginal income, suggesting that cashing out the Food Stamp Program could greatly reduce food expenditures. T...

  14. 41 CFR 101-25.103-3 - Trading stamps or bonus goods received from contractors.

    Science.gov (United States)

    2010-07-01

    ... 41 Public Contracts and Property Management 2 2010-07-01 2010-07-01 true Trading stamps or bonus... PROCUREMENT 25-GENERAL 25.1-General Policies § 101-25.103-3 Trading stamps or bonus goods received from contractors. When contracts contain a price reduction clause, any method (such as trading stamps or...

  15. 26 CFR 1.451-4 - Accounting for redemption of trading stamps and coupons.

    Science.gov (United States)

    2010-04-01

    ... 26 Internal Revenue 6 2010-04-01 2010-04-01 false Accounting for redemption of trading stamps and...-4 Accounting for redemption of trading stamps and coupons. (a) In general—(1) Subtraction from... method taxpayer is engaged in the business of selling trading stamps or premium coupons, and such...

  16. Rapid fabrication of nano-structured quartz stamps.

    Science.gov (United States)

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

    2013-02-01

    Replication of surface nano-structures from a master stamp allows large-area volume production that is otherwise cost prohibitive through conventional direct-write methods, such as electron beam lithography and focused ion beam milling. However, the creation of a master stamp containing sophisticated patterns still requires significant time on such direct-write tools. We demonstrate a method for reducing this tool time by patterning smaller nano-structures, and then enlarging them to the desired size through isotropic etching. We can create circular structures of any arrangement and size, down to the patterning limits of the direct-write tools. Subsequent metal mask deposition, lift-off, and anisotropic etching transforms the circular patterns to out-of-plane pillar structures for the final stamp. A 1 cm(2) area filled with a pattern of 200 nm diameter nano-holes spaced 520 nm apart, requires only 21 h to complete using our process, compared to 75 h using conventional fabrication. We demonstrate the utility and practicality of the quartz stamps through polymer embossing and replication. Embossed polymer nano-hole arrays are coated with a Cr/Au (5/100 nm) film to create surface plasmon resonance structures. Extraordinary optical transmission spectra from the metallized arrays show the expected spectral features when compared to focused ion beam milled structures.

  17. 78 FR 10201 - Proposed Information Collection; Electronic Duck Stamp Program

    Science.gov (United States)

    2013-02-13

    ...); or hope_grey@fws.gov (email). FOR FURTHER INFORMATION CONTACT: To request additional information about this IC, contact Hope Grey at hope_grey@fws.gov (email) or 703- 358-2482 (telephone... National Wildlife Refuge System. The Federal Duck Stamp is one of the most successful conservation...

  18. DC-STAMP: A Key Regulator in Osteoclast Differentiation.

    Science.gov (United States)

    Chiu, Ya-Hui; Ritchlin, Christopher T

    2016-11-01

    Osteoimmunology research is a new emerging research field that investigates the links between the bone and immune responses. Results from osteoimmunology studies suggest that bone is not only an essential component of the musculoskeletal system, but is also actively involved in immune regulation. Many important factors involved in immune regulation also participate in bone homeostasis. Bone homeostasis is achieved by a coordinated action between bone-synthesizing osteoblasts and bone-degrading osteoclasts. An imbalanced action between osteoblasts and osteoclasts often results in pathological bone diseases: osteoporosis is caused by an excessive osteoclast activity, whereas osteopetrosis results from an increased osteoblast activity. This review focuses on dendritic cell-specific transmembrane protein (DC-STAMP), an important protein currently considered as a master regulator of osteoclastogenesis. Of clinical relevance, the frequency of circulating DC-STAMP+ cells is elevated during the pathogenesis of psoriatic diseases. Intriguingly, recent results suggest that DC-STAMP also plays an imperative role in bone homeostasis by regulating the differentiation of both osteoclasts and osteoblasts. This article summarizes our current knowledge on DC-STAMP by focusing on its interacting proteins, its regulation on osteoclastogenesis-related genes, its possible involvement in immunoreceptor tyrosine-based inhibitory motif (ITIM)-mediated signaling cascade, and its potential of developing therapeutics for clinical applications. J. Cell. Physiol. 231: 2402-2407, 2016. © 2016 Wiley Periodicals, Inc. PMID:27018136

  19. Classical Motion

    OpenAIRE

    Mould, Richard A

    2003-01-01

    Preciously given rules allow conscious systems to be included in quantum mechanical systems. There rules are derived from the empirical experience of an observer who witnesses a quantum mechanical interaction leading to the capture of a single particle. In the present paper it is shown that purely classical changes experienced by an observer are consistent with these rules. Three different interactions are considered, two of which combine classical and quantum mechanical changes. The previous...

  20. Prediction and Control of Wrinkle and Fracture for Stamping Regular Polygonal Box

    Institute of Scientific and Technical Information of China (English)

    LEI Jun-xiang

    2004-01-01

    Based on the deformation characteristic of regular polygonal box stamped parts and the superfluous triangle material wrinkle model, the criterion of regular polygonal box stamped parts without wrinkle was deduced and used to predict and control the wrinkle limit. According to the fracture model, the criterion of regular polygonal box stamped parts without fracture was deduced and used to predict and control the fracture limit. Combining the criterion for stamping without wrinkle with that without fracture, the stamping criterion of regular polygonal box stamped parts was obtained to predict and control the stamping limit. Taken the stainless steel 0Cr18Ni9 (SUS304) sheet and the square box stamped part as examples, the limit diagram was given to predict and control the wrinkle, fracture and stamping limits. It is suitable for the deep drawing without flange, the deep drawing and stretching combined forming with flange and the rigid punch stretching of plane blank. The limit deep-drawing coefficient and the minimum deep-drawing coefficient can be determined, and the appropriate BHF (blank holder force) and the deep-drawing force can be chosen. These provide a reference for the technology planning, the die and mold design and the equipment determination, and a new criterion evaluating sheet stamping formability, which predicts and controls the stamping process, can be applied to the deep drawing under constant or variable BHF conditions.

  1. Efficient methods of nanoimprint stamp cleaning based on imprint self-cleaning effect

    International Nuclear Information System (INIS)

    Nanoimprint lithography (NIL) is a nonconventional lithographic technique that promises low-cost, high-throughput patterning of structures with sub-10 nm resolution. Contamination of nanoimprint stamps is one of the key obstacles to industrialize the NIL technology. Here, we report two efficient approaches for removal of typical contamination of particles and residual resist from stamps: thermal and ultraviolet (UV) imprinting cleaning-both based on the self-cleaning effect of imprinting process. The contaminated stamps were imprinted onto polymer substrates and after demolding, they were treated with an organic solvent. The images of the stamp before and after the cleaning processes show that the two cleaning approaches can effectively remove contamination from stamps without destroying the stamp structures. The contact angles of the stamp before and after the cleaning processes indicate that the cleaning methods do not significantly degrade the anti-sticking layer. The cleaning processes reported in this work could also be used for substrate cleaning.

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

    Science.gov (United States)

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

    2003-01-01

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

  3. Classical electrodynamics

    CERN Document Server

    Schwinger, Julian Seymour; Milton, K A; Tsai, W Y

    1998-01-01

    This text for the graduate classical electrodynamics course was left unfinished upon Julian Schwinger's death in 1994, but was completed by his coauthors, who have brilliantly recreated the excitement of Schwinger's novel approach. Classical Electrodynamics captures Schwinger's inimitable lecturing style, in which everything flows inexorably from what has gone before. An essential resource for both physicists and their students, the book includes a "Reader's Guide", which describes the major themes in each chapter, suggests a possible path through the book, and identifies topics for inclusion

  4. Classical Motion

    CERN Document Server

    Mould, R A

    2003-01-01

    Preciously given rules allow conscious systems to be included in quantum mechanical systems. There rules are derived from the empirical experience of an observer who witnesses a quantum mechanical interaction leading to the capture of a single particle. In the present paper it is shown that purely classical changes experienced by an observer are consistent with these rules. Three different interactions are considered, two of which combine classical and quantum mechanical changes. The previously given rules support all of these cases. Key Words: brain states, conscious observer, detector, measurement, probability current, state reduction, von Neumann, wave collapse.

  5. Research Progress on Molecular Biology Detection Technique of Classical Swine Fever%猪瘟的分子生物学检测技术研究进展

    Institute of Scientific and Technical Information of China (English)

    王茁; 赵福广

    2011-01-01

    Classical Swine Fever is a fatal and widely infectious disease caused by Classical Swine Fever Virus. Molecular biology plays an active role in studying the epidemiological characteristics of Classical Swine Fever, especially in laboratory diagnosis. This paper illustrates several major integrated molecular biology detection techniques of Classical Swine Fever,which aims at offering a reference for fast, accurate and high-throughput detection of Classical Swine Fever Virus.%猪瘟是由猪瘟病毒引起的高致死率的烈性传染病.针对猪瘟近年来的发病特征,分子生物学检测技术在实验室诊断中发挥了重要作用.对几种主要的猪瘟分子生物学检测技术进行了综述,为快速、准确、高通量地检测猪瘟病毒提供参考.

  6. Stamps of New China Eastern Zhou Dynasty Bronzes

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    The State Postal Bureau’s latest set of special stamps for 2003 features Eastern Zhou Dynasty (770-256 B,C.) bronzes. This eight-stamp set is the third to feature this type of relic; a set issued in 1964 depicted bronzes from the Yin Dynasty (14th-11th century}, and one featuring Western Zhou Dynasty (11th century-771 B.C.) bronzes was released in 1982.The Eastern Zhou Dynasty followed the Western, and during this period, bronze vessel casting developed remarkably. Artifacts from this period include sacrificial vessels, musical instruments, utensils, weapons and tools.One of these pieces, a rectangular tray decorated with tortoise and fish patterns, dates back to the late Spring and Autumn Period

  7. Material Characterization for FEM Simulation of Sheet Metal Stamping Processes

    OpenAIRE

    Alejandro Quesada; Antonio Gauchia; Carolina Álvarez-Caldas; José Luis San Román

    2014-01-01

    Sheet metal forming is an important technology in manufacturing, especially in the automotive industry. Today, engineering simulation tools based on the finite elements method are employed regularly in the design of stamping dies for sheet metal parts. However, a bad material model choice or the use of nonaccurate enough parameters can lead to imprecise simulation results. This work uses ANSYS LS-DYNA software to analyze several material models and the influence of their parameter values in F...

  8. Miniaturised Spotter-Compatible Multicapillary Stamping Tool for Microarray Printing

    CERN Document Server

    Drobyshev, A L; Zasedatelev, A S; Drobyshev, Alexei L; Verkhodanov, Nikolai N; Zasedatelev, Alexander S

    2007-01-01

    Novel microstamping tool for microarray printing is proposed. The tool is capable to spot up to 127 droplets of different solutions in single touch. It is easily compatible with commercially available microarray spotters. The tool is based on multichannel funnel with polypropylene capillaries inserted into its channels. Superior flexibility is achieved by ability to replace any printing capillary of the tool. As a practical implementation, hydrogel-based microarrays were stamped and successfully applied to identify the Mycobacterium tuberculosis drug resistance.

  9. Stereo Matching of Planar Curves Composed of Time Stamped Points

    Institute of Scientific and Technical Information of China (English)

    Wang Shuwen; Zhang Tianxu

    2006-01-01

    Matching features such as curve segments in stereo images play a very important role in scene reconstruction. In this paper, a stereo matching algorithm for the trajectories composed of time stamped points is proposed. Based on time stamped points, planar curve match measurements are given first, such as time constraint, cross-ratio invariant constraint and epipolar geometry constraint;then, a trajectory matching method is proposed based on epipolar geometry constraint and cross-ratio invariant constraint. In order to match the planar curve segments projected by perspective projection system, the curve start time and end time are selected first to prepare match candidates. Then, the epipolar equation is used to discard the unmatched curve segment candidates. At last, a cross ratio invariant constraint is used to find the most matched curve segments. If their match measurement is higher than the specialized threshold, a candidate with the least cross ratio difference is then selected as the match result; otherwise, no match is found. Unlike the conventional planar curve segments matching algorithm, this paper presents a weakly calibrated binocular stereo vision system which is based on wide baseline. The stamped points are obtained by targets detecting method of flying objects from image sequences.Due to wide baseline, there must exist the projection not in epipolar monotonic order or the curve segments located in very short distance and keeping the epipolar monotonic order. By using the method mentioned above, experiments are made to match planar curve segments not only in epipolar monotonic order but also not in epipolar monotonic order. The results show that the performance of our curve matching algorithm is effective for matching the arc-like planar trajectories composed of time stamped points.

  10. Research progress on classical swine fever virus peplos glycoprotein E2%猪瘟病毒囊膜糖蛋白E2研究进展

    Institute of Scientific and Technical Information of China (English)

    宁红梅; 葛亚明; 岳锋; 王选年; 银梅

    2010-01-01

    猪瘟(classical swine fever,CSF)是危害养猪业的主要传染病之一,致病原是猪瘟病毒(classical swine fever virus,CSFV),E2囊膜糖蛋白是CSFV的主要抗原蛋白.本文对E2蛋白的分子结构、抗原特性、对病毒毒力的影响和在进入靶细胞过程中的作用等4个方面的研究现状进行了阐述.

  11. 猪瘟疫苗质量的替代检验方法研究进展%Progress on New Alternative Test Method for Quality Inspection of Classical Swine Fever Vaccine

    Institute of Scientific and Technical Information of China (English)

    祖立闯; 吴信明; 谢金文; 沈志强; 李娇; 唐娜; 王金良; 苗立中; 张娜; 王艳

    2015-01-01

    国标的猪瘟疫苗效力检验、支原体检验、外源病毒检验等质量检验方法均存在试验周期长、操作繁琐、敏感性较低等缺点,随着现代免疫学与分子生物学技术的快速发展,猪瘟疫苗质量检验的新兴替代检验方法日臻发展和完善。论文就近年来针对猪瘟病毒的病毒含量测定、猪瘟疫苗效力检验、支原体检验、外源病毒检验等免疫学与分子生物学新兴检测方法的研究进展做一综述,以期为提高猪瘟疫苗的质量检验水平、保障猪瘟疫苗质量提供参考依据。%the national classical swine fever vaccine potency test ,Mycoplasma inspection ,exogenous virus test quality inspection method existed long test cycle ,complicated operation ,and low sensitivity ,with the rapid development of modern immunology and molecular biology technology ,the emerging alternative test methods for classical swine fever vaccine quality inspection gradual development and improvement .This paper makes a review of the new detection methods for recent immunology and molecular biology research progress on the classical swine fever virus content determination ,classical swine fever vaccine potency test ,Mycoplasma inspection ,exogenous virus test ,in order to provide the reference basis for improving the level of quality inspection of classical swine fever vaccine ,guarantee the quality of classical swine fever vaccine .

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

    Science.gov (United States)

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

    2015-05-29

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

  13. Estimation Model for Magnetic Properties of Stamped Electrical Steel Sheet

    Science.gov (United States)

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

    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.

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

    Science.gov (United States)

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

    2001-10-01

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

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

    Science.gov (United States)

    Raza, Ali; Saha, Basudeb

    2013-09-01

    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).

  16. Application of Modified Digital Halftoning Techniques to Data Hiding in Personalized Stamps

    Institute of Scientific and Technical Information of China (English)

    Hsi-Chun Wang; Chi-Ming Lian; Pei-Chi Hsiao

    2004-01-01

    The objective of this research is to embed information in personalized stamps by modified digital halftoning techniques. The displaced and deformed halftone dots are used to encode data in the personalized stamps. Hidden information can be retrieved by either an optical decoder or digital image processing techniques.The results show that personalized stamps with value-added features like data hiding or digital watermarking can be successfully implemented.

  17. Fatigue analysis-based numerical design of stamping tools made of cast iron

    OpenAIRE

    Ben Slima, Khalil; Penazzi, Luc; Mabru, Catherine; Ronde-Oustau, François

    2013-01-01

    International audience This work concerns stress and fatigue analysis of stamping tools made of cast iron with an essentially pearlitic matrix and containing foundry defects. Our approach consists at first, in coupling the stamping numerical processing simulations and structure analysis in order to improve the tool stiffness geometry for minimizing the stress state and optimizing their fatigue lifetime. The method consists in simulating the stamping process by considering the tool as a per...

  18. Ben Franklin, America’s Postage Stamp Star — on the Wane?

    Directory of Open Access Journals (Sweden)

    François Brunet

    2010-01-01

    Full Text Available This paper is an assessment of Ben Franklin’s evolving figure in U.S. postage stamps, focusing especially on the contrast between the 2006 tercentennial Franklin 4-stamp panel, a rather high-brow representation of Franklin as an intellectual, and his traditional image as a homely, common face. The singular history of U.S. postage stamps, with their innovative choice of historical figures as subject matter and their broader emphasis on commemoration, is briefly summarized. The evolution of the Franklin figure — the most common postal image, along with George Washington — is then detailed, showing how the traditional image prevailed until the 1950s, before being progressively displaced by a more cultural and, lately, intellectual image of the nation’s “electrizer”.Cet article vise à interpréter l’évolution de la figure de Benjamin Franklin dans les timbres-poste des Etats-Unis, en se fondant notamment sur le contraste entre le bloc de quatre timbres émis lors du tricentenaire en 2006, qui représente Franklin dans les différents métiers d’un intellectuel des Lumières, et son image traditionnelle d’Américain simple et moyen. On retrace tout d’abord l’histoire singulière des timbres américains, caractérisée par le choix innovant de figures historiques comme sujets et plus généralement par la prééminence de la fonction commémorative. Puis on étudie en détail l’évolution de la figure de Franklin — sujet le plus fréquent des timbres américains avec George Washington — en montrant que l’image traditionnelle s’est perpétuée jusqu’aux années 1950, avant de céder progressivement à une image plus culturelle et, récemment, plus intellectuelle.

  19. Determination of the interfacial heat transfer coefficient in the hot stamping of AA7075

    OpenAIRE

    Liu Xiaochuan; Ji Kang; Fakir Omer El; Liu Jun; Zhang Qunli; Wang Liliang

    2015-01-01

    The interfacial heat transfer coefficient (IHTC) is a key parameter in hot stamping processes, in which a hot blank is formed and quenched by cold dies simultaneously. The IHTC should therefore be identified and used in FE models to improve the accuracy of simulation results of hot stamping processes. In this work, a hot stamping simulator was designed and assembled in a Gleeble 3800 thermo-mechanical testing system and a FE model was built in PAM-STAMP to determine the IHTC value between a h...

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

    Science.gov (United States)

    Glover, Paul

    2010-05-01

    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

  1. Classical tachyons

    International Nuclear Information System (INIS)

    A review of tachyons, with particular attention to their classical theory, is presented. The extension of Special Relativity to tachyons in two dimensional is first presented, an elegant model-theory which allows a better understanding also of ordinary physics. Then, the results are extended to the four-dimensional case (particular on tachyon mechanics) that can be derived without assuming the existence of Super-luminal reference-frames. Localizability and the unexpected apparent shape of tachyonic objects are discussed, and it is shown (on the basis of tachyon kinematics) how to solve the common causal paradoxes. In connection with General Relativity, particularly the problem of the apparent superluminal expansions in astrophysics is reviewed. The problem (still open) of the extension of relativitic theories to tachyons in four dimensions is tackled, and the electromagnetic theory of tachyons, a topic that can be relevant also for the experimental side, is reviewed. (Author)

  2. Massively Parallel Processing for Fast and Accurate Stamping Simulations

    Science.gov (United States)

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

    2005-08-01

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

  3. Stamps of New China: The Eight Immortals Cross the Sea

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    On July 30, 2004, the State Postal Bureau issued its first asymmetrical perforated stamp in tnbute to the popular tale of how the Eight Immortals Crossed the Sea. The Eight Immortals are the most important figures in Chinese Taoist mythology. Each carried with them a magical object: a drum, a fan, a sword, a gourd, a bamboo flute, castanets, a basket of flowers and a lotus. Wherever they went they helped the weak and poor, punished evil-doers and encouraged people to do good. Immortality was their reward for such good deeds.

  4. Design considerations for HFQ® hot stamped aluminium structural panels

    Directory of Open Access Journals (Sweden)

    Foster Alistair

    2015-01-01

    Full Text Available HFQ is a deep drawing process for alloyed aluminium sheet that can be used to produce complex-stamped forms while maintaining the high-strength of 6xxx and 7xxx alloys. By adopting a strategy to design for HFQ at the platform level, designers can reduce part count (thereby reducing cost and weight, reduce gauge (thereby reducing weight, and improve part packaging. Two simple design examples are given to assist designers in evolving traditionally formed panel designs to HFQ formed solutions. Example features are used to illustrate the effect of geometry, thickness and strength on the final structural component.

  5. Recent progress on polymer optical waveguides

    Science.gov (United States)

    Kobayashi, Junya

    2008-02-01

    Intensive research on optical interconnection over flexible optical circuit boards has been undertaken for such applications as high-end routers, servers and cellular phones. And these flexible optical circuit boards are expected to be used for polymer optical waveguides. This paper reports recent progress on polymer optical waveguides. It also describes a flexible stamping method, which employs a flexible film stamp made of polymeric materials. Unlike conventional hard stamps, the flexible film stamp does not require either the stamp or its substrate to be perfectly flat, which means large area stamping is easy to achieve at reduced cost. We confirmed this by replicating 50 μm multi-mode optical polymer waveguides. The propagation loss of the waveguide is fairly low at 0.06 dB/cm at a wavelength of 850 nm. This loss is sufficiently small to meet the basic requirement for optical circuit boards, and the waveguide was used to fabricate a flexible optical circuit board with MT connectors.

  6. Stamping, Clapping and Chanting: An Ancient Learning Pathway?

    Directory of Open Access Journals (Sweden)

    Marion M. Long

    2006-04-01

    Full Text Available In this review I explore the effect of temporal integration as a means of improving learning in schoolchildren. I focus first on theorists that have linked physical activity with a positive effect on children’s learning and second to psychological studies that have established the existence of innate temporal patterns. These findings are related to a model of temporal integration that I have developed from Croce’s writings on aesthetics (1900. From philosophy to neurology, I discuss recent neurological findings relating to timing and conclude that an organ of temporal integration, regulation and coordination operates in the brain with respect to physical, intuitive and higher cognitive function. I link recent findings in neurophysiology to notably similar findings in recent biomusicological studies. The finding that humans have an involuntary physical response to loud, low-frequency sounds are attributed to an innate legacy of proto-music and proto-dance behaviour among hominids. I develop the model of temporal integration further by examining the literature on stamping and clapping patterns of ancient traditional dances in relation to Husserl’s writings on theoretical succession. From philosophy to pedagogy, I summarise the review by proposing stamping, clapping and chanting as a means of achieving improved temporal integration.

  7. Single Time-Stamped Tries for Retroactive Call Subsumption

    CERN Document Server

    Cruz, Flavio

    2011-01-01

    Tabling is an evaluation strategy for Prolog programs that works by storing answers in a table space and then by using them in similar subgoals. Some tabling engines use call by subsumption, where it is determined that a subgoal will consume answers from a more general subgoal in order to reduce the search space and increase efficiency. We designed an extension, named Retroactive Call Subsumption (RCS), that implements call by subsumption independently of the call order, thus allowing a more general subgoal to force previous called subgoals to become answer consumers. For this extension, we propose a new table space design, the Single Time Stamped Trie (STST), that is organized to make answer sharing across subsumed/subsuming subgoals simple and efficient. In this paper, we present the new STST table space design and we discuss the main modifications made to the original Time Stamped Tries approach to non-retroactive call by subsumption. In experimental results, with programs that stress some deficiencies of ...

  8. Morpho peleides butterfly wing imprints as structural colour stamp.

    Science.gov (United States)

    Zobl, Sigrid; Salvenmoser, Willi; Schwerte, Thorsten; Gebeshuber, Ille C; Schreiner, Manfred

    2016-02-02

    This study presents the replication of a color-causing nanostructure based on the upper laminae of numerous cover scales of Morpho peleides butterfly wings and obtained solely by imprinting their upper-wing surfaces. Our results indicate that a simple casting technique using a novel integrated release agent can obtain a large positive replica using negative imprints via Polyvinylsiloxane. The developed method is low-tech and high-yield and is thus substantially easier and less expensive than previous methods. The microstructures were investigated with light microscopy, the nanostructures with both scanning and transmission electron microscopy, and the reflections with UV visible spectrometry. The influence of the release agent and the quality of the master stamp were determined by comparing measurements of the cover-scale sizes and their chromaticity values obtained by their images and with their positive imprints. The master stamp provided multiple positive replicas up to 3 cm(2) in just 1 h with structural coloration effects visible to the naked eye. Thus, the developed method proves the accuracy of the replicated nanostructure and its potential industrial application as a color-producing nanostamp.

  9. Optimizing the Natural Frequencies of Beams via Notch Stamping

    Directory of Open Access Journals (Sweden)

    Nabeel T. Alshabatat

    2012-07-01

    Full Text Available Natural frequency optimization is important to avoid the coincidence of excitation frequency and natural frequency which causes resonance phenomenon. In this study, the natural frequencies of a beam, with different boundary conditions, are enhanced by stamping V-notches on its surface. These notches alter the local stiffness in the beam while keeping the mass the same. This method is cost-effective in comparison with other Structural Dynamics Modification methods (SDM because it is a one-step manufacturing method and because it enhances the dynamic behavior of beam structures without additional weight or additional joints. The natural frequencies of notched beam are calculated by finite element method. In particular, ANSYS package is used in building the notched beam models for modal analysis. The effect of notch location and size on the beam fundamental frequency is investigated. The simulation results indicated that creating notches on free-free beam decreases its fundamental frequency, while creating notches on clamped beam may increase its fundamental frequency. The optimal designs of notched beams are presented. The proposed method couples a finite element method for the modal analysis with an optimization technique based on Genetic Algorithm (GA. Three examples are presented to show the optimal design of free-free and clamped notched beams. The optimization results show that V-notch stamping technique is an effective technique to optimize the natural frequencies.

  10. Research progress of diagnosis and control of classical swine fever%猪瘟诊断和防制研究进展

    Institute of Scientific and Technical Information of China (English)

    胡慧; 邱昌庆

    2004-01-01

    猪瘟(Classical swine fever,CSF)是严重威胁养猪业、具有重要经济意义的病毒性疾病之一,被国际兽疫局(OIE)列为A类的15种传染病之一。其特征是小血管壁变性,内脏器官多发性出血、坏死和梗塞。该病的病原是猪瘟病毒(CSFV),CSFV在分类上属于黄病毒科(Flaviviridae)瘟病毒属(Pesti-virus),同属的还有牛病毒性腹泻病毒(Bovine viral diarrhea virus,BVDV)和绵羊边界病病毒(Border disease virus,BDV),

  11. 46 CFR 52.01-140 - Certification by stamping (modifies PG-104 through PG-113).

    Science.gov (United States)

    2010-10-01

    ... inches) of the front of firetube boilers; and (ii) The drum head of water tube boilers. (3) Those heating...) MARINE ENGINEERING POWER BOILERS General Requirements § 52.01-140 Certification by stamping (modifies PG-104 through PG-113). (a) All boilers built in accordance with this part must be stamped with...

  12. 49 CFR 238.119 - Rim-stamped straight-plate wheels.

    Science.gov (United States)

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Rim-stamped straight-plate wheels. 238.119 Section... ADMINISTRATION, DEPARTMENT OF TRANSPORTATION PASSENGER EQUIPMENT SAFETY STANDARDS Safety Planning and General Requirements § 238.119 Rim-stamped straight-plate wheels. (a)(1) Except as provided in paragraph (a)(2) of...

  13. 77 FR 24177 - Approval for Manufacturing Authority; Foreign-Trade Zone 177; Hoosier Stamping & Mfg. Corp...

    Science.gov (United States)

    2012-04-23

    ...); Whereas, notice inviting public comment has been given in the Federal Register (76 FR 67132-67133, 10-31... Foreign-Trade Zones Board Approval for Manufacturing Authority; Foreign-Trade Zone 177; Hoosier Stamping... 177, has requested manufacturing authority on behalf of Hoosier Stamping & Mfg. Corp. d/b/a...

  14. State of Maine: Strategies for Improving Food Stamp, Medicaid, and SCHIP Participation.

    OpenAIRE

    Robin Dion; Gary Hyzer; Charles Nagatoshi

    2000-01-01

    Presents promising practices from the state of Maine, which has very high participation rates in the Food Stamp Program, and suggests that bringing the "human" aspect back into the delivery of human services by taking a personal, flexible, and creative approach can facilitate enrollment and retention in the Food Stamp and Medicaid programs.

  15. Determination of the interfacial heat transfer coefficient in the hot stamping of AA7075

    Directory of Open Access Journals (Sweden)

    Liu Xiaochuan

    2015-01-01

    Full Text Available The interfacial heat transfer coefficient (IHTC is a key parameter in hot stamping processes, in which a hot blank is formed and quenched by cold dies simultaneously. The IHTC should therefore be identified and used in FE models to improve the accuracy of simulation results of hot stamping processes. In this work, a hot stamping simulator was designed and assembled in a Gleeble 3800 thermo-mechanical testing system and a FE model was built in PAM-STAMP to determine the IHTC value between a hot aluminium alloy 7075 blank and cold dies. The IHTC was determined at different contact pressures under both dry and lubricated (Omega-35 conditions. In addition, a model to calculate the IHTC value at different contact pressures and area densities of lubricant was developed for the hot stamping process.

  16. Progress in new-type vaccines against classical swine fever%新型猪瘟疫苗研究进展

    Institute of Scientific and Technical Information of China (English)

    王春花; 孙元; 仇华吉

    2013-01-01

    Classical swine fever (CSF),an acute and highly contagious disease of swine,is caused by classical swine fever virus.CSF is one of the most devastating diseases to the pig industry worldwide and results in serious economic losses.Currently prophylactic vaccination is still an important strategy for the control of CSF.Live attenuated vaccines (such as C-strain) are safe and effective.However,there are significant changes in the clinical features of CSF,displaying concurrent typical and atypical CSF,and simultaneous inapparent and persistent infections.Immunization failure has been reported frequently and it is difficult to distinguish between wild-type infected and vaccinated animals (DIVA).So there is an urgent need to develop more effective and safer DIVA or marker vaccines for the control of CSF.In this review,some of the most recent advances in new-type vaccines against CSF,including DNA vaccines,live virus-vectored vaccines,protein or peptide-based vaccines,gene-deleted vaccines and chimeric pestivirus-based vaccines,are reviewed and discussed.%猪瘟是由猪瘟病毒引起猪的一种急性、热性和高度接触性传染病.该病呈世界性分布,给世界养猪业造成了巨大的经济损失.目前,疫苗接种仍然是防控猪瘟的主要手段.虽然传统的猪瘟弱毒疫苗(如C株)安全有效,但猪瘟的临床表现发生了很大变化,呈现典型猪瘟和非典型猪瘟共存、隐性感染和持续感染并现,免疫失败的现象时有报道,且不能区分野毒感染和免疫接种.因此,研制安全、高效、能区分野毒感染和疫苗免疫动物(DIVA)的新型猪瘟疫苗极为必要.文中就近年来开发的核酸疫苗、病毒活载体疫苗、基于蛋白/肽的疫苗、基因缺失疫苗、嵌合瘟病毒疫苗等新型DIVA猪瘟疫苗作一综述.

  17. Research progress in the technology of prevention and control for classical swine fever (CSF)%猪瘟防控技术的研究进展

    Institute of Scientific and Technical Information of China (English)

    栾培贤; 肖建华; 王洪斌

    2016-01-01

    猪瘟(classical swine fever,CSF)是高度传染性动物疫病,给全世界养猪业造成巨大的经济损失.清除和控制猪瘟的发生,需从多个方面提高猪瘟防控水平,才能达到猪瘟综合防控的目的.近年来,猪瘟防控相关方面的研究主要集中在以下几个点:开发有效的新型猪瘟疫苗、构建快速高效的猪瘟诊断方法、应用计算机模拟技术研究猪瘟防控策略及建立可靠的猪瘟疫情监测体系.文章详细介绍了国内外有关猪瘟防控方面的研究进展.

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

    Science.gov (United States)

    Subramaniam, E T

    2012-12-01

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

  19. Design and Development on Intelligent Layout System of Stamping Blanks

    Directory of Open Access Journals (Sweden)

    Fangjuan Li

    2012-11-01

    Full Text Available The optimal layout of stamping blanks is a complicated problem under the control of multi-circumstances, and it cannot be best solved by any single algorithm. In order to solve this problem, the paper proposed a new kind of algorithm combining CHNN and genetic algorithm. It set up models for irregular parts, and these irregular parts were processed by using the surrounding rectangle methods and graphic composition. The paper used AutoCAD as a develop studio, and discussed CHNN and its mapping to layout and optimize the weight of CHNN by genetic algorithm. The kernel program adopted VB program language and developed the intelligent layout system. With the input of layout parts graphics and layout parameter, the system preprocessed graphics and gave layout results automatically. Sample analysis showed the results that the system had good man-machine interfaces, interactive features, high speed and quality retention of solution.

  20. Strong assortative mating by diet, color, size, and morphology but limited progress toward sympatric speciation in a classic example: Cameroon crater lake cichlids.

    Science.gov (United States)

    Martin, Christopher H

    2013-07-01

    Models predict that sympatric speciation depends on restrictive parameter ranges, such as sufficiently strong disruptive selection and assortative mating, but compelling examples in nature have rarely been used to test these predictions. I measured the strength of assortative mating within a species complex of Tilapia in Lake Ejagham, Cameroon, a celebrated example of incipient sympatric adaptive radiation. This species complex is in the earliest stages of speciation: morphological and ecological divergence are incomplete, species differ primarily in breeding coloration, and introgression is common. I captured 27 mated pairs in situ and measured the diet, color, size, and morphology of each individual. I found strong assortative mating by color, size, head depth, and dietary source of benthic or pelagic prey along two independent dimensions of assortment. Thus, Ejagham Tilapia showed strong assortative mating most conducive to sympatric speciation. Nonetheless, in contrast to a morphologically bimodal Sarotherodon cichlid species pair in the lake, Ejagham Tilapia show more limited progress toward speciation, likely due to insufficient strength of disruptive selection on morphology estimated in a previous study (γ = 0.16). This supports the predicted dependence of sympatric speciation on strong assortment and strong disruptive selection by examining a potentially stalled example in nature. PMID:23815664

  1. Resistless Fabrication of Nanoimprint Lithography (NIL Stamps Using Nano-Stencil Lithography

    Directory of Open Access Journals (Sweden)

    Juergen Brugger

    2013-10-01

    Full Text Available In order to keep up with the advances in nano-fabrication, alternative, cost-efficient lithography techniques need to be implemented. Two of the most promising are nanoimprint lithography (NIL and stencil lithography. We explore here the possibility of fabricating the stamp using stencil lithography, which has the potential for a cost reduction in some fabrication facilities. We show that the stamps reproduce the membrane aperture patterns within ±10 nm and we validate such stamps by using them to fabricate metallic nanowires down to 100 nm in size.

  2. Analysis and Simulations of Inertia Force in Ultra High Speed Stamping Machine

    Directory of Open Access Journals (Sweden)

    Jianyu Bai

    2010-12-01

    Full Text Available Based on analysis and simulations, it is found that extremely high inertia forces will be generated in stamping machine when stroke speed falls in range for ultra high speed stamping machine if a regular crank-slider mechanism is used. This paper presents a design method to lower the inertia forces by using balancing structure. The effectiveness of the proposed structure is validated through simulations. An analytical method to evaluate performance of balancing structure is also presented. This work paves the way to develop ultra high speed stamping machine.

  3. Process control for sheet-metal stamping process modeling, controller design and shop-floor implementation

    CERN Document Server

    Lim, Yongseob; Ulsoy, A Galip

    2014-01-01

    Process Control for Sheet-Metal Stamping presents a comprehensive and structured approach to the design and implementation of controllers for the sheet metal stamping process. The use of process control for sheet-metal stamping greatly reduces defects in deep-drawn parts and can also yield large material savings from reduced scrap. Sheet-metal forming is a complex process and most often characterized by partial differential equations that are numerically solved using finite-element techniques. In this book, twenty years of academic research are reviewed and the resulting technology transitioned to the industrial environment. The sheet-metal stamping process is modeled in a manner suitable for multiple-input multiple-output control system design, with commercially available sensors and actuators. These models are then used to design adaptive controllers and real-time controller implementation is discussed. Finally, experimental results from actual shopfloor deployment are presented along with ideas for further...

  4. Numerical Effectiveness of the Simulation of an Automotive Body Part Stamping

    Directory of Open Access Journals (Sweden)

    Jacek Stadnicki

    2015-02-01

    Full Text Available The simulation of advanced high-strength steel sheet (AHSS stamping processes by means of dedicated computer-aided engineering (CAE software requires the use of appropriate material models, the use of complex FEM models, and the use of advanced methods for solving nonlinear problems of their analysis. In practice, the engineering design of automotive body parts often leads to the formulation of problems, the solution of which requires ample computer resources and is very time-consuming. The paper describes a methodology to simulate stamping on the example of a car body part, with special attention being paid to the numerical efficiency of the FEM model and methods of solving it. The simulations of stamping of a sample stamped part—the automotive body part—in DynaForm and AutoForm programs are compared, focusing on the numerical effectiveness and consistency of the simulation results with the reality.

  5. Impact of Simulation Technology on Die and Stamping Business

    Science.gov (United States)

    Stevens, Mark W.

    2005-08-01

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

  6. Wheeling Charges Methodology for Deregulated Electricity Markets using Tracing-based Postage Stamp Methods

    OpenAIRE

    Hassan, M. Y.; N.H. Radzi; M.P Abdullah; F. Hussin; M.S. Majid

    2011-01-01

    MW-mile and Postage-stamp methods is traditionally used by electric utilities to determine a fixed transmission cost among users of firm transmission service. MW-Mile method is charging the users by determining the actual paths the power follows through the network. However, this method is not sufficient to recover the total transmission system cost. To recover the total transmission system cost, the Postage Stamp Method is adopted. This method is simple but its main drawback is that the char...

  7. Diet, shopping and food-safety skills of food stamp clients improve with nutrition education

    OpenAIRE

    Joy, Amy Block

    2004-01-01

    The California Food Stamp Nutrition Education Program (FSNEP) reaches approximately 50,000 families with children and individuals annually. Results from the 2001-2002 fiscal year demonstrated improvements in a variety of dietary and food-safety skills after clients received FSNEP training. In addition, results from a subsample (n = 460) showed significant improvements in the amount of money saved on food purchases, along with improved dietary quality. FSNEP provides food stamp clients with ne...

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

    Science.gov (United States)

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

    2011-08-01

    Crash, NVH (Noise, Vibration, Harshness), and durability analysis are commonly deployed in structural CAE analysis for mechanical design of components especially in the automotive industry. Components manufactured by stamping constitute a major portion of the automotive structure. In CAE analysis they are modeled at a nominal state with uniform thickness and no residual stresses and strains. However, in reality the stamped components have non-uniformly distributed thickness and residual stresses and strains resulting from stamping. It is essential to consider the stamping information in CAE analysis to accurately model the behavior of the sheet metal structures under different loading conditions. Especially with the current emphasis on weight reduction by replacing conventional steels with aluminum and advanced high strength steels it is imperative to avoid over design. Considering this growing need in industry, a highly automated and robust method has been integrated within Altair Hyperworks® to initialize sheet metal components in CAE models with stamping data. This paper demonstrates this new feature and the influence of stamping data for a full car frontal crash analysis.

  9. Carbon nanotube substrates and catalyzed hot stamp for polishing and patterning the substrates

    Science.gov (United States)

    Wang, Yuhuang; Hauge, Robert H.; Schmidt, Howard K.; Kim, Myung Jong; Kittrell, W. Carter

    2009-09-08

    The present invention is generally directed to catalyzed hot stamp methods for polishing and/or patterning carbon nanotube-containing substrates. In some embodiments, the substrate, as a carbon nanotube fiber end, is brought into contact with a hot stamp (typically at 200-800.degree. C.), and is kept in contact with the hot stamp until the morphology/patterns on the hot stamp have been transferred to the substrate. In some embodiments, the hot stamp is made of material comprising one or more transition metals (Fe, Ni, Co, Pt, Ag, Au, etc.), which can catalyze the etching reaction of carbon with H.sub.2, CO.sub.2, H.sub.2O, and/or O.sub.2. Such methods can (1) polish the carbon nanotube-containing substrate with a microscopically smooth finish, and/or (2) transfer pre-defined patterns from the hot stamp to the substrate. Such polished or patterned carbon nanotube substrates can find application as carbon nanotube electrodes, field emitters, and field emitter arrays for displays and electron sources.

  10. Optimization of Stamp Forming Process for Thermoplastic Composites

    Directory of Open Access Journals (Sweden)

    Chih-Min Ma

    2014-02-01

    Full Text Available The present study is focused on the development of a two-dimensional stamping method for the manufacturing of fiber reinforced composites with thermoplastic matrix resins. Materials investigated are carbon fiber reinforced polyamide-6. Taguchi L16 orthogonal array is used in split-plot designs. The processing conditions include thermoforming temperature, mold temperature, pressure and time, required to establish high-quality parts. From the experimental results, we derive a set of best combination, A1 (90°, B2 (263C, C1 (105C, D1 (33 kg/cm2 and E2 (48 sec and carry out an estimated equation for the short-beam shear strength. The results have described the correlations between processing parameters and shear stress. Finally, for verifying the prediction ability of the estimated equation, the confirmation experiments are conducted. The confirmation test result is 48.67 kg/mm2, fall in the confidence interval. It shows that the prediction ability of estimated equation and the repetition of the experimental results has confirmed and accepted by the tests.

  11. Insulation from basaltic stamp sand. Final technical report

    Energy Technology Data Exchange (ETDEWEB)

    Williams, F. D.

    1981-04-01

    A Midwest Appropriate Technology Grant was awarded to determine the technical and economic feasibility of producing mineral-fiber insulation directly from extensive deposits of basaltic sand produced during former mining and milling operations in the Keweenaw Peninsula region of Michigan's Upper Peninsula. The amounts of local basaltic sands available and representative chemical compositions were determined. The variation of viscosity with temperature and chemical composition was estimated. Samples were melted and either pulled or blown into fiber. In all cases fiber could be made with a reasonable tensile strength to ensure usefulness. It was concluded that it was technically feasible to produce fibers from basaltic stamp sands of the Upper Peninsula of Michigan. A technical feasibility study using published data, a cost and design analysis of a basalt fiber production plant, a market survey of fiber needs, and an economic analysis for investing in a basalt fiber venture was undertaken. These studies concluded that the local production of basaltic insulation was both feasible and economically reasonable. It was suggested that the plant be located in a region of greater population density with lower utility costs. A representative one-third of these studies is included as appendices A, B, C, and D.

  12. Stamping Formability of ZE10 Magnesium Alloy Sheets

    Institute of Scientific and Technical Information of China (English)

    Liu Ying; Li Yuanyuan; Li Wei

    2007-01-01

    ZE10 magnesium alloy sheets were prepared through ingot casting and the hot-rolling process. The mechanical properties, conical cup value (CCV), bore expanding performance, and limit drawing ratio (LDR) were investigated to examine the stamping formability of ZE10 alloy sheets, at temperatures ranging from 20 to 300 ℃. The results showed that the tensile strength decreased, whereas, plasticity, drawing-bulging performance, bore expanding properties, and deep drawing performance increased markedly at elevated temperatures. The CCV specimens could be drawn into the conical die's underside cylindrical hole from the conical cliff, without cracking, and could have the minimum CCV at 200 and 250 ℃. In the bore-expanding test, the bore (Φ10 mm) could be expanded to the dimension of the punch (Φ25 mm) and the maximum bore-expanding ratio could be achieved at above 150 ℃. The limiting drawing ratio (LDR) of 2.85 is acquired during the deep drawing test at 230 ℃ with the punch temperature of 20~ 50 ℃, the punch velocity of 50 mm·min-1, and the mixture of graphite and cylinder grease as lubricant.

  13. The Study on Weldability of Boron Steel and Hot-Stamped Steel by Using Laser Heat Source (Ⅲ) - Comparison on Laser Weldability of Boron Steel and Hot -Stamped Steel-

    Energy Technology Data Exchange (ETDEWEB)

    Choi, So Young; Kim, Jong Do [Korea Maritime and Ocean University, Busan (Korea, Republic of); Kim, Jong Su [Korea Institute of Machinery and Materials, Daejeon (Korea, Republic of)

    2015-01-15

    This study was conducted to compare the laser weldability of boron steel and hot-stamped steel. In general, boron steel is used in the hot-stamping process. Hot-stamping is a method for simultaneously forming and cooling boron steel in a press die after heating it to the austenitizing temperature. Hot-stamped steel has a strength of 1500 MPa or more. Thus, in this study, the laser weldability of boron steel and that of hot-stamped steel were investigated and compared. A continuous wave disk laser was used to produce butt and lap joints. In the butt welding, the critical cooling speed at which full penetration was obtained in the hot-stamped steel was lower than that of boron steel. In the lap welding, the joint widths were similar regardless of the welding speed when full penetration was obtained.

  14. Classical Concepts in Quantum Programming

    OpenAIRE

    Oemer, Bernhard

    2002-01-01

    The rapid progress of computer technology has been accompanied by a corresponding evolution of software development, from hardwired components and binary machine code to high level programming languages, which allowed to master the increasing hardware complexity and fully exploit its potential. This paper investigates, how classical concepts like hardware abstraction, hierarchical programs, data types, memory management, flow of control and structured programming can be used in quantum comput...

  15. Classicalization of Quantum Variables

    CERN Document Server

    Koide, T

    2014-01-01

    A systematic procedure to extract classical degrees of freedom in quantum mechanics is formulated using the stochastic variational method. With this classicalization, a hybrid model constructed from quantum and classical variables (quantum-classical hybrids) is derived systematically. In this procedure, conservation laws such as energy are maintained, and Eherefest`s theorem is still satisfied with modification. The criterion for the applicability of quantum-classical hybrids is also investigated.

  16. Newly Designed Cr-Mn Alloyed Ultra-high Strength Steel without Boron Addition for Hot-stamping Processing

    Institute of Scientific and Technical Information of China (English)

    Guo-hui ZHU; Hong-bing ZHOU; Qin-yi LI; Qi-wei CHEN; Hai-rong GU; Yong-gang LIU

    2015-01-01

    A newly designed hot-stamping steel alloyed by chromium (Cr)and manganese (Mn)without boron (B) addition was developed for automobile mass reduction.The experimental results showed the Cr-Mn alloyed steel could be quenched to full martensite microstructure when the cooling rate was higher than 1 4 ℃/s.Yield strength, tensile strength and elongation of the experimental hot stamping part reached 1 1 8 0 MPa,1 6 4 5 MPa and 8.4%, respectively.The experimental hot stamping part possessed higher tensile strength and elongation,compared with conventional hot-stamping steel of 2 2 MnB5 .Furthermore,excellent processing flexibility would be obtained in this novel hot-stamping steel because of its lower critical cooling rate and phase transformation temperature.The design of the composition and investigations of microstructure,mechanical properties and hot-stamping processing were also studied.

  17. What classicality? Decoherence and Bohr's classical concepts

    CERN Document Server

    Schlosshauer, Maximilian

    2010-01-01

    Niels Bohr famously insisted on the indispensability of what he termed "classical concepts." In the context of the decoherence program, on the other hand, it has become fashionable to talk about the "dynamical emergence of classicality" from the quantum formalism alone. Does this mean that decoherence challenges Bohr's dictum and signifies a break with the Copenhagen interpretation-for example, that classical concepts do not need to be assumed but can be derived? In this paper we'll try to shine some light down the murky waters where formalism and philosophy cohabitate. To begin, we'll clarify the notion of classicality in the decoherence description. We'll then discuss Bohr's and Heisenberg's take on the quantum-classical problem and reflect on different meanings of the terms "classicality" and "classical concepts" in the writings of Bohr and his followers. This analysis will allow us to put forward some tentative suggestions for how we may better understand the relation between decoherence-induced classical...

  18. No Return to Classical Reality

    CERN Document Server

    Jennings, David

    2015-01-01

    At a fundamental level, the classical picture of the world is dead, and has been dead now for almost a century. Pinning down exactly which quantum phenomena are responsible for this has proved to be a tricky and controversial question, but a lot of progress has been made in the past few decades. We now have a range of precise statements showing that whatever the ultimate laws of Nature are, they cannot be classical. In this article, we review results on the fundamental phenomena of quantum theory that cannot be understood in classical terms. We proceed by first granting quite a broad notion of classicality, describe a range of quantum phenomena (such as randomness, discreteness, the indistinguishability of states, measurement-uncertainty, measurement-disturbance, complementarity, noncommutativity, interference, the no-cloning theorem, and the collapse of the wave-packet) that do fall under its liberal scope, and then finally describe some aspects of quantum physics that can never admit a classical understandi...

  19. K2CO3 catalysis on the reactivity of top charged coke and stamp charged coke

    Science.gov (United States)

    Pang, Qing-hai; Zhang, Jian-liang; Qi, Cheng-lin; Ma, Chao; Kong, De-wen; Mao, Rui

    2013-01-01

    The catalysis of K2CO3 on the reactivity of top charged coke and stamp charged coke from Pansteel in China was studied. The coke reaction index of the stamp charged coke was 1%-2% higher than that of the top charged coke. Under the catalysis of K2CO3, the coke reaction index of both cokes approximately increased by 4%, 6%, 10% and 6% at 900, 1000, 1100 and 1200°C, respectively. The reactivity of the K-enriched stamp charged coke was 1%-2% higher than that of the K-enriched top charged coke below 1100°C. However, only negligible differences were found in the temperature zone between 1100 and 1200°C. Scanning electron microscopy images illustrated that pores in the top charged coke were smaller and equally distributed, while relatively more big pores exist non-homogenously in stamp charged coke. Due to the different processes in production, the stamp charged coke was more porous and most of the pores tended to be applanate. Cracks were observed in the microstructure of the stamp charged coke during the carbon solution reaction, implying the inferior quality of the stamp charged coke to the top charged coke at high temperature. Diffusion of K during the carbon solution reaction was studied by the energy dispersive spectrometry. It is found that K gradually spreads into the center of lumpy coke with the rising of temperature and is equally distributed on the edges of pores at 1200°C. Besides, oxidation reactions of functional groups become faster with the catalysis of K.content

  20. Stamped coal cakes in cokemaking technology Part 2 - The investigation of cake strength

    Energy Technology Data Exchange (ETDEWEB)

    Abel, F.; Rosenkranz, J.; Kuyumcu, H.Z. [Technical University of Berlin, Berlin (Germany)

    2009-07-15

    Coking of coal blends using high volatile coals with poor caking properties to produce a high quality coke for blast furnace application can be achieved by compacting the whole coal blend before the pyrolysis in the so called stamp charge operation. Using stamp charging not only improves the flexibility of the cokemaking plant using cost efficient raw materials, but also increases oven throughput. Therefore, in recent years, densification of coals has been introduced even to coals with good carbonisation properties when heat recovery ovens are used. At the Department for Mechanical Process Engineering and Solids Processing of the Technical University Berlin, the two subprocesses, densification and strengthening during stamping, were theoretically and experimentally investigated. The research work aims on the development of an integrated mathematical model, allowing the calculation of cake density and strength of the coal cake for a given coal blend and as a function of the stamping energy. In the first part of the paper, investigations on the stampability of coal blends were reported. In this paper, the development of a new strength test device for the systematic investigation of mechanical strength of coal compacts produced by stamping is described. Results from compressive strength tests indicate an elastic-plastic behaviour with failure by plastic fracture. Shear test results show similarity to the yield limit description in soil mechanics.

  1. Quantum computing classical physics.

    Science.gov (United States)

    Meyer, David A

    2002-03-15

    In the past decade, quantum algorithms have been found which outperform the best classical solutions known for certain classical problems as well as the best classical methods known for simulation of certain quantum systems. This suggests that they may also speed up the simulation of some classical systems. I describe one class of discrete quantum algorithms which do so--quantum lattice-gas automata--and show how to implement them efficiently on standard quantum computers.

  2. The stamp technique for direct Class II composite restorations: A case series

    Science.gov (United States)

    Alshehadat, Saaid Ayesh; Halim, Mohamad Syahrizal; Carmen, Koh; Fung, Chew Shi

    2016-01-01

    Background: “Stamp” technique is a new method for placing large composite restorations with accurate occlusal topography. It was introduced mainly to restore Class I cavities and erosively damaged teeth. This technique is indicated when the preoperative anatomy of the tooth is intact and not lost due to the carious lesion. A precise tooth-like filling an accurate functional occlusion is obtained when the stamp technique is applied. However, using this technique to restore Class II cavities is not established yet. Aim: To introduce modifications of the stamp technique that make it applicable to restore Class II composite restorations. Materials and Methods: The traditional materials and tools used for direct composite restorations are needed with no additional instruments. Clinical illustrations and step-by-step description are provided in this paper. Results and Conclusion: Using the stamp technique to restore Class II cavities is achievable, simple and practical, and result in a very accurate anatomical restoration. PMID:27656074

  3. Micromechanical exfoliation of two-dimensional materials by a polymeric stamp

    Science.gov (United States)

    Ferraz da Costa, M. C.; Ribeiro, H. B.; Kessler, F.; de Souza, E. A. T.; Fechine, G. J. M.

    2016-02-01

    In this work, an alternative technique to the traditional micromechanical exfoliation of two-dimensional materials is proposed, consisting of isolated flakes of graphite and molybdenum disulphide onto polymeric surfaces films. The set made up of polymer and flakes is fabricated by using a hot-press machine called polymeric stamp. The polymeric stamp was used to allocate flakes and also to allow the exfoliation process to take place just in one face of isolated flake. Optical microscopy, Raman spectroscopy and photoluminescence spectroscopy results showed that multilayers, bilayers and single layers of graphene and MoS2 were obtained by using a polymeric stamp as tool for micromechanical exfoliation. These crystals were more easily found because the exfoliation process concentrates them in well-defined locations. The results prove the effectiveness of the method by embedding two-dimensional materials into polymers to fabricate fewer layers crystals in a fast, economic and clean way.

  4. Prototype VME and CAMAC form factor time stamping module development for nuclear physics experiment

    International Nuclear Information System (INIS)

    The modern nuclear physics experiments employ large detector arrays for measurement of different radiations, like charge particle, Gamma, Neutron etc. Heterogeneous detector systems may have different response time and different front end processing. The trigger rate of the individual detector system, as well as the width of the acquisition window may vary accordingly. It may not be possible to generate a common GATE signal to acquire correlated events, without introducing significant dead time. It is proposed to run multiple DAQ (Data Acquisition System) independently on its own trigger and mark the data with high-resolution time stamps. Time stamp may be the absolute time or a local counter value. The offline event builder generates the global correlated events by matching the time stamp values

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

    Science.gov (United States)

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

    2014-07-01

    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.

  6. INSTALLATION FOR LARGE SIZE STAMP HARDENING TRANINIG BY WATER-AIR MIXTURE

    Directory of Open Access Journals (Sweden)

    L. A. Glazkov

    2009-01-01

    Full Text Available The BNTU has developed a technological process for large-size stamp hardening by means of a water-air mixture.  The  basic  requirements  imposed on an hardening  installation using  a  water-air mixture are the following: provision of smooth cooling of a part in order to achieve the required  hardness and structure; possibility of machining parts of various sizes; change of modes for machining parts of various grades of steel according to any hardness rate.The peculiar features of the given installation are: a presence of microprocessor control of water-air mixture supply, possibility of simultaneous machining of a stamp set (2 parts and position change of parts to be hardened in the process of thermal treatment.Installation for large-sized stamp hardening has been manufactured and introduced at theMinskplant of special tools and machining attachments.

  7. Imprints of the Neolithic mind – clay stamps from the Republic of Macedonia

    Directory of Open Access Journals (Sweden)

    Goce Naumov

    2008-12-01

    Full Text Available The presence and unusual structure of clay stamps found in Neolithic settlements often give rise to multiple interpretations to define their character. The small dimensions and specific shape of the stamps suggests that these portable objects were important in the social relations and visual communication between members within the same community and, possibly, more distant communities. The definite patterns distinguishe their function in maintaining the visual traditions of the populations inhabiting southeastern Europe. They had an important role in building the Neolithic image modularity, so that they fitted into the comprehensive decorative structure of Neolithic iconography, and the patterns present on the stamps are related to several aspects of Neolithic material culture from the Balkans and Anatolia. This homogeneity of patterns indicates that they were actively included in the transposition of cognition into visual metaphors.

  8. Numerical Validation of an Optimized Cooling System for Hot Stamping Die

    Science.gov (United States)

    Zakaria, A.; Abidin, M. A.; Ibrahim, M. S. N.; Senin, A.

    2016-08-01

    Numerical analysis of hot stamping process is very complex mainly due to thermomechanical processes involved. Many variables such as heat transfer coefficient, density, young modulus and other thermal parameters are temperature and pressure dependent. The paper presents results of CFD analysis on the near optimized cooling system of hot stamping die for automotive structural part. By using actual parameters obtained from the industry production line, this research is aimed at comparing the performance of actual cooling system with the results obtained by CFD simulation using commercial software. The die and blank were modelled as 3D volume mesh in a closed position thus ignoring blank history data prior to stamping operation. Temperature distribution representing hardness of the simulated final part is an agreement with the QA data of the actual part thus showing viability of this method to be used in cooling system design

  9. viStaMPS: The Application For Viewing And Manipulating StaMPS Results

    Science.gov (United States)

    Sousa, Joaquim; Sousa, Antonio; Magalhaes, Luis; Ruiz, Antonio

    2013-12-01

    viStaMPS (visual StaMPS) is a new visual application developed to enhance the visualization, manipulation and exportation of StaMPS results. The programmed application is developed in Matlab® through the Graphical User Interface (GUI) and no coding is required for running it, which avoids any programming language knowledge for standard uses. This tool integrates fully new features together with various scripts from StaMPS, allowing the generation of the desired plots/maps in a user-friendly interface. It is done by simply clicking some buttons or changing some parameters located in visual panels, instead of input commands in a prompt. Moreover, since it is written in Matlab, it gives the users the opportunity to access the data very easily and make their own modifications. Being a research tool, viStaMPS is continually under development and will count on the dynamism of its users to improve and/or add new features.

  10. Modeling the constitutive and frictional behavior of PTFE flexible stamps for nanoimprint lithography

    DEFF Research Database (Denmark)

    Sonne, Mads Rostgaard; Hattel, Jesper Henri

    2013-01-01

    In the present work, the deformation on micro-scale of PTFE flexible stamps for nanoimprint lithography is modeled. This is achieved via a combination of proper models for the constitutive behavior as well as the frictional conditions between the deforming PTFE stamp and the steel tool. The model...... was verified through an experiment, where a PTFE sheet was deformed by a steel sphere mounted in a tensile test machine. Good agreement between simulations and experimental results is found, both regarding force–displacement and corresponding principal strain measurements. As expected, applying the correct...

  11. TWO RHODIAN STAMPED AMPHORA HANDLES FROM TELL ES-SUKHNAH (JORDAN): A CASE STUDY

    OpenAIRE

    Ali, Nabil; Bader, Nabil

    2015-01-01

    During recent excavations at the archaeological site of Tell Es-Sukhnah in north east Jordan, an in-situ Rohdian amphora was found. The most important thing about that amphora is that both handles are carrying stamps in Greek scripts. The texts contain the name of an eponym, a Rhodian month-name and the fabricant’s name. Similar objects in the southern Levant enable dating the stamps to the second century B.C. The imported Amphora at Es-Sukhnah, besides other small finds, highlights the...

  12. Micropatterning of a stretchable conductive polymer using inkjet printing and agarose stamping

    DEFF Research Database (Denmark)

    Hansen, Thomas Steen; Hassager, Ole; Larsen, Niels Bent;

    2007-01-01

    A highly conducting stretchable polymer material has been patterned using additive inkjet printing and by subtractive agarose stamping of a deactivation agent (hypochlorite). The material consisted of elastomeric polyurethane combined in an interpenetrating network with a conductive polymer, poly(3......,4-ethylenedioxythiophene) (PEDOT). The agarose stamping produced 50 μm wide conducting lines with high spatial fidelity. The deactivation agent was found to cause some degradation of the remaining conducting lines, as revealed by a stronger increase in resistance upon straining compared to the pristine polymer material...

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

    International Nuclear Information System (INIS)

    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

  14. Entanglement in Classical Optics

    CERN Document Server

    Ghose, Partha

    2013-01-01

    The emerging field of entanglement or nonseparability in classical optics is reviewed, and its similarities with and differences from quantum entanglement clearly pointed out through a recapitulation of Hilbert spaces in general, the special restrictions on Hilbert spaces imposed in quantum mechanics and the role of Hilbert spaces in classical polarization optics. The production of Bell-like states in classical polarization optics is discussed, and new theorems are proved to discriminate between separable and nonseparable states in classical wave optics where no discreteness is involved. The influence of the Pancharatnam phase on a classical Bell-like state is deived. Finally, to what extent classical polarization optics can be used to simulate quantum information processing tasks is also discussed. This should be of great practical importance because coherence and entanglement are robust in classical optics but not in quantum systems.

  15. 45 CFR 205.25 - Eligibility of supplemental security income beneficiaries for food stamps or surplus commodities.

    Science.gov (United States)

    2010-10-01

    ....25 Eligibility of supplemental security income beneficiaries for food stamps or surplus commodities... 45 Public Welfare 2 2010-10-01 2010-10-01 false Eligibility of supplemental security income beneficiaries for food stamps or surplus commodities. 205.25 Section 205.25 Public Welfare Regulations...

  16. From classical to quantum physics

    CERN Document Server

    Stehle, Philip

    2017-01-01

    Suitable for lay readers as well as students, this absorbing survey explores the twentieth-century transition from classical to quantum physics. Author Philip Stehle traces the shift in the scientific worldview from the work of Galileo, Newton, and Darwin to the modern-day achievements of Max Planck, Albert Einstein, Ernest Rutherford, Niels Bohr, and others of their generation. His insightful overview examines not only the history of quantum physics but also the ways that progress in the discipline changed our understanding of the physical world and forces of nature. This chronicle of the second revolution in the physical sciences conveys the excitement and suspense that new developments produced in the scientific community. The narrative ranges from the classical physics of the seventeenth-century to the emergence of quantum mechanics with the entrance of the electron, the rise of relativity theory, the development of atomic theory, and the recognition of wave-particle duality. Relevant mathematical details...

  17. Classical Concepts in Quantum Programming

    CERN Document Server

    Oemer, B

    2002-01-01

    The rapid progress of computer technology has been accompanied by a corresponding evolution of software development, from hardwired components and binary machine code to high level programming languages, which allowed to master the increasing hardware complexity and fully exploit its potential. This paper investigates, how classical concepts like hardware abstraction, hierarchical programs, data types, memory management, flow of control and structured programming can be used in quantum computing. The experimental language QCL will be introduced as an example, how elements like irreversible functions, local variables and conditional branching, which have no direct quantum counterparts, can be implemented, and how non-classical features like the reversibility of unitary transformation or the non-observability of quantum states can be accounted for within the framework of a procedural programming language.

  18. No return to classical reality

    Science.gov (United States)

    Jennings, David; Leifer, Matthew

    2016-01-01

    At a fundamental level, the classical picture of the world is dead, and has been dead now for almost a century. Pinning down exactly which quantum phenomena are responsible for this has proved to be a tricky and controversial question, but a lot of progress has been made in the past few decades. We now have a range of precise statements showing that whatever the ultimate laws of nature are, they cannot be classical. In this article, we review results on the fundamental phenomena of quantum theory that cannot be understood in classical terms. We proceed by first granting quite a broad notion of classicality, describe a range of quantum phenomena (such as randomness, discreteness, the indistinguishability of states, measurement-uncertainty, measurement-disturbance, complementarity, non-commutativity, interference, the no-cloning theorem and the collapse of the wave-packet) that do fall under its liberal scope, and then finally describe some aspects of quantum physics that can never admit a classical understanding - the intrinsically quantum mechanical aspects of nature. The most famous of these is Bell's theorem, but we also review two more recent results in this area. Firstly, Hardy's theorem shows that even a finite-dimensional quantum system must contain an infinite amount of information, and secondly, the Pusey-Barrett-Rudolph theorem shows that the wave function must be an objective property of an individual quantum system. Besides being of foundational interest, results of this sort now find surprising practical applications in areas such as quantum information science and the simulation of quantum systems.

  19. Entanglement in Classical Optics

    OpenAIRE

    Ghose, Partha; Mukherjee, Anirban

    2013-01-01

    The emerging field of entanglement or nonseparability in classical optics is reviewed, and its similarities with and differences from quantum entanglement clearly pointed out through a recapitulation of Hilbert spaces in general, the special restrictions on Hilbert spaces imposed in quantum mechanics and the role of Hilbert spaces in classical polarization optics. The production of Bell-like states in classical polarization optics is discussed, and new theorems are proved to discriminate betw...

  20. Bidirectional coherent classical communication

    OpenAIRE

    Harrow, Aram W.; Leung, Debbie W.

    2005-01-01

    A unitary interaction coupling two parties enables quantum or classical communication in both the forward and backward directions. Each communication capacity can be thought of as a tradeoff between the achievable rates of specific types of forward and backward communication. Our first result shows that for any bipartite unitary gate, bidirectional coherent classical communication is no more difficult than bidirectional classical communication — they have the same achievable rate regions. ...

  1. Classical, Semi-classical and Quantum Noise

    CERN Document Server

    Poor, H; Scully, Marlan

    2012-01-01

    David Middleton was a towering figure of 20th Century engineering and science and one of the founders of statistical communication theory. During the second World War, the young David Middleton, working with Van Fleck, devised the notion of the matched filter, which is the most basic method used for detecting signals in noise. Over the intervening six decades, the contributions of Middleton have become classics. This collection of essays by leading scientists, engineers and colleagues of David are in his honor and reflect the wide  influence that he has had on many fields. Also included is the introduction by Middleton to his forthcoming book, which gives a wonderful view of the field of communication, its history and his own views on the field that he developed over the past 60 years. Focusing on classical noise modeling and applications, Classical, Semi-Classical and Quantum Noise includes coverage of statistical communication theory, non-stationary noise, molecular footprints, noise suppression, Quantum e...

  2. China to Stamp Inspection and Quarantine Marks on Export Foods from September 1, 2007

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    @@ The General Administration of Quality Supervision, Inspection and Quarantine of China (AQSIQ) announced that as of September 1, 2007,shipping packages of export foods will be stamped with inspection and quarantine marks after the foods are inspected and quarantined in conformity with the entry-exit inspection and quarantine rules. Unstamped packages will be prohibited from export.

  3. 75 FR 4911 - Food Stamp Program: Eligibility and Certification Provisions of the Farm Security and Rural...

    Science.gov (United States)

    2010-01-29

    ... and Certification Provisions of the Farm Security and Rural Investment Act of 2002 AGENCY: Food and... Agriculture Food and Nutrition Service 7 CFR Parts 272 and 273 Food Stamp Program: Eligibility and Certification Provisions of the Farm Security and Rural Investment Act of 2002; Final Rule...

  4. 75 FR 23565 - Food Stamp Program: Eligibility and Certification Provisions of the Farm Security and Rural...

    Science.gov (United States)

    2010-05-04

    ... Farm Security and Rural Investment Act of 2002, which was published on January 29, 2010 (75 FR 4912... / Tuesday, May 4, 2010 / Rules and Regulations#0;#0; ] DEPARTMENT OF AGRICULTURE Food and Nutrition Service 7 CFR Parts 272 and 273 RIN 0584-AD30 Food Stamp Program: Eligibility and Certification...

  5. Impact of Electronic Signatures and Time Stamping for the Protection of Electronic Agreements

    Directory of Open Access Journals (Sweden)

    Tadas Limba

    2013-02-01

    Full Text Available The article e495 valuates the impact of e-signatures and time stamping on electronic contracts and electronic documents for performing e-business opportunities and goals, and analyses e-signature application for business cases. Various electronic services, virtual shopping, electronic cash transactions are becoming increasingly popular as they allow users to quickly perform different actions, operations and functions. It is important not only for convenience, but also to ensure consumer data security and reliability. Security reasons are not enough for security transmitted data, since this method does not allow clarification of information about sender identity. Use of electronic signatures, electronic identities, checgs and ensures a very high level of data security in interchange data processes. E-signature allows e-business companies to transfer the company’s operation business processes and their application to the organization and management in the electronic environment, also automate internal and external compans processes, includinggon-going business processes. The object of paper is .-signature and time stamping application in the theoretical and practical way. The goal of this paper while evaluating and estimating the .-signature and time stamping application, i’s regulation and legal implementation worldwidesand in Lithuania—is to provideluseful recommendations for more efficient impact developing -commerce and -business in situations when -signature and time stamping is used for ensuring electronic contracs security.

  6. Impact of Electronic Signatures and Time Stamping for the Protection of Electronic Agreements

    Directory of Open Access Journals (Sweden)

    Tadas Limba

    2012-12-01

    Full Text Available The article e495 valuates the impact of e-signatures and time stamping on electronic contracts and electronic documents for performing e-business opportunities and goals, and analyses e-signature application for business cases. Various electronic services, virtual shopping, electronic cash transactions are becoming increasingly popular as they allow users to quickly perform different actions, operations and functions. It is important not only for convenience, but also to ensure consumer data security and reliability. Security reasons are not enough for security transmitted data, since this method does not allow clarification of information about sender identity.Use of electronic signatures, electronic identities, checgs and ensures a very high level of data security in interchange data processes. E-signature allows e-business companies to transfer the company’s operation business processes and their application to the organization and management in the electronic environment, also automate internal and external compans processes, includinggon-going business processes.The object of paper is .-signature and time stamping application in the theoretical and practical way.The goal of this paper while evaluating and estimating the .-signature and time stamping application, i’s regulation and legal implementation worldwidesand in Lithuania—is to provideluseful recommendations for more efficient impact developing -commerce and -business in situations when -signature and time stamping is used for ensuring electronic contracs security.

  7. THE QUALIMETRY OF LARGE-SIZED STAMPED-SHEET DETAILS GEOMETRY

    Directory of Open Access Journals (Sweden)

    A. Demchenko

    2009-01-01

    Full Text Available The qualimetric method of the large-sized stamped-sheet details influence of geometric shape on the manufacture performance characteristics are given. The graphic model of shape classification and geometric shape factor definition algorithms for triangular and quadrangular shapes are proposed.

  8. COMPARING STUDY OF BLENDING PREHEATING MODIFIED COAL COKING AND STAMPING COKING FOR DONGSHEN COAL

    Institute of Scientific and Technical Information of China (English)

    伍林; 尹学琼; 魏贤勇; 宗志敏; 陈清如

    1999-01-01

    The compaison of the properties of coke of three coking methods is introduced. The mechanical properties and high temperature reactivity of coke blending preheating modified Dongshen coal are improved obviously than those of normal coke, and achieve or exceed that of stamping coke. This method shews more ability of expending coking coal resources.

  9. 27 CFR 70.332 - Unauthorized use or sale of stamps.

    Science.gov (United States)

    2010-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 2 2010-04-01 2010-04-01 false Unauthorized use or sale of stamps. 70.332 Section 70.332 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY (CONTINUED) PROCEDURES AND PRACTICES PROCEDURE AND ADMINISTRATION Collection of Excise and Special...

  10. Stamp design effect on 100 nm feature size for 8 inch NanoImprint lithography

    Energy Technology Data Exchange (ETDEWEB)

    Landis, S [CEA/LETI/Nanotec 17 rue. des Martyrs, 38 054 Grenoble Cedex 9 (France); Chaix, N [Laboratoire des Technologies de la Microelectronique-CNRS, 17 rue. des Martyrs (CEA-LETI), 38 054 Grenoble Cedex 9 (France); Gourgon, C [Laboratoire des Technologies de la Microelectronique-CNRS, 17 rue. des Martyrs (CEA-LETI), 38 054 Grenoble Cedex 9 (France); Perret, C [Laboratoire des Technologies de la Microelectronique-CNRS, 17 rue. des Martyrs (CEA-LETI), 38 054 Grenoble Cedex 9 (France); Leveder, T [CEA/LETI/Nanotec 17 rue. des Martyrs, 38 054 Grenoble Cedex 9 (France)

    2006-05-28

    Sub-100 nm resolution on a 200 mm silicon stamp has been hot embossed into commercial Sumitomo NEB 22 resist. A single pattern, exposed with electron beam lithography, has been considered to define the stamp and thus make it possible to point out the impact of stamp design on the printing. These results may be considered as a first attempt to define rules to solve the proximity printing effects (PPEs). Moreover, a large range of initial resist thickness, from 56 to 506 nm, has been spin coated to assess the effect of polymer flow properties for the stamp cavity filling and the printed defects. A detailed analysis of the printed resist in dense hole patterns showed that the application volume conservation is enough to calculate the residual layer thickness as the height of the printed resist feature. Good accordance has been obtained between the theoretical approach and experimental results. Moreover, the impact of the pattern symmetry breakdown on mould deformation is clearly shown in this paper in the printed areas as well as in the unprinted areas.

  11. Stamps of New China: Special Stamps:Liu Yi Delivers a Letter

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    On July 17, 2004 the State Postal Bureau issued a setof four stamps whose theme is Liu Yi Delivers a Letter. Thestamps picture the Dragon Princess Asking Liu Yi to Delivera Letter, Liu Yi Delivering a Letter to Dongting Lake, FamilyReunion, and Mutual Love.

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

    Science.gov (United States)

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

    2008-01-01

    We analyze a multi-campus collaboration in a Food Stamp Enrollment Campaign to demonstrate that a well-managed public benefits campaign, associated with broader advocacy-based community partnerships, can result in positive outcomes for the community that include measurable benefits for clients, data needed to make policy and administrative…

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

    Science.gov (United States)

    Fuller-Thomson, Esme; Redmond, Melissa

    2008-01-01

    Purpose: Older adults are less likely than any other age group to use the federal Food Stamp Program. The personal and social costs of elderly diet insufficiency include disease exacerbation, depression, and increased hospitalization. In order to improve targeting and outreach efforts, this study identifies the characteristics of eligible older…

  14. PROCESS AND UNCONVENTIONAL METHOD OF MARKING OR STAMPING OF HARD METAL

    Directory of Open Access Journals (Sweden)

    Gheorghe Popescu

    2011-07-01

    Full Text Available The authors present in this work a new unconventional technological way of marking or stamping ofvery hard metals from tempered steel with help of explosives. Even this method is in experimental stage, it canbecame an object for study in another related domains.

  15. Fabrication of microlens array on silicon surface using electrochemical wet stamping technique

    Science.gov (United States)

    Lai, Lei-Jie; Zhou, Hang; Zhu, Li-Min

    2016-02-01

    This paper focuses on the fabrication of microlens array (MLA) on silicon surface by taking advantage of a novel micromachining approach, the electrochemical we stamping (E-WETS). The E-WETS allows the direct imprinting of MLA on an agarose stamp into the substrate through a selective anodic dissolution process. The pre-patterned agarose stamp can direct and supply the solution preferentially on the contact area between the agarose stamp and the substrate, to which the electrochemical reaction is confined. The anodic potential vs. saturated calomel electrode is optimized and 1.5 V is chosen as the optimum value for the electrochemical polishing of p-Si. A refractive MLA on a PMMA mold is successfully transferred onto the p-Si surface. The machining deviations of the fabricated MLA from those on the mold are 0.44% in diameter and 2.1% in height respectively, and the machining rate in HF is around 1.1 μm/h. The surface roughness of the fabricated MLA is less than 12 nm owing to the electrochemical polishing process. The results demonstrate that E-WETS is a promising approach to fabricate MLA on p-Si surface with high accuracy and efficiency.

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

    Science.gov (United States)

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

    2012-01-01

    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…

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

    Science.gov (United States)

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

    2009-01-01

    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…

  18. Teleportation via classical entanglement

    CERN Document Server

    Rafsanjani, Seyed Mohammad Hashemi; Magaña-Loaiza, Omar S; Boyd, Robert W

    2015-01-01

    We present a classical counterpart to quantum teleportation that uses classical entanglement instead of quantum entanglement. In our implementation we take advantage of classical entanglement among three parties: orbital angular momentum (OAM), polarization, and the radial degrees of freedom of a beam of light. We demonstrate the teleportation of arbitrary OAM states, in the subspace spanned by any two OAM states, to the polarization of the same beam. Our letter presents the first classical demonstration of a commonly-perceived--quantum phenomenon that requires entanglement among more than two parties.

  19. Classical and semiclassical aspects of chemical dynamics

    Energy Technology Data Exchange (ETDEWEB)

    Gray, S.K.

    1982-08-01

    Tunneling in the unimolecular reactions H/sub 2/C/sub 2/ ..-->.. HC/sub 2/H, HNC ..-->.. HCN, and H/sub 2/CO ..-->.. H/sub 2/ + CO is studied with a classical Hamiltonian that allows the reaction coordinate and transverse vibrational modes to be considered directly. A combination of classical perturbation theory and the semiclassical WKB method allows tunneling probabilities to be obtained, and a statistical theory (RRKM) is used to construct rate constants for these reactions in the tunneling regime. In this fashion, it is found that tunneling may be important, particularly for low excitation energies. Nonadiabatic charge transfer in the reaction Na + I ..-->.. Na /sup +/ + I/sup -/ is treated with classical trajectories based on a classical Hamiltonian that is the analogue of a quantum matrix representation. The charge transfer cross section obtained is found to agree reasonably well with the exact quantum results. An approximate semiclassical formula, valid at high energies, is also obtained. The interaction of radiation and matter is treated from a classical viewpoint. The excitation of an HF molecule in a strong laser is described with classical trajectories. Quantum mechanical results are also obtained and compared to the classical results. Although the detailed structure of the pulse time averaged energy absorption cannot be reproduced classically, classical mechanics does predict the correct magnitude of energy absorption, as well as certain other qualitative features. The classical behavior of a nonrotating diatomic molecule in a strong laser field is considered further, by generating a period advance map that allows the solution over many periods of oscillation of the laser to be obtained with relative ease. Classical states are found to form beautiful spirals in phase space as time progresses. A simple pendulum model is found to describe the major qualitative features. (WHM)

  20. Lectures on Classical Integrability

    CERN Document Server

    Torrielli, Alessandro

    2016-01-01

    We review some essential aspects of classically integrable systems. The detailed outline of the lectures consists of: 1. Introduction and motivation, with historical remarks; 2. Liouville theorem and action-angle variables, with examples (harmonic oscillator, Kepler problem); 3. Algebraic tools: Lax pairs, monodromy and transfer matrices, classical r-matrices and exchange relations, non-ultralocal Poisson brackets, with examples (non-linear Schroedinger model, principal chiral field); 4. Features of classical r-matrices: Belavin-Drinfeld theorems, analyticity properties, and lift of the classical structures to quantum groups; 5. Classical inverse scattering method to solve integrable differential equations: soliton solutions, spectral properties and the Gel'fand-Levitan-Marchenko equation, with examples (KdV equation, Sine-Gordon model). Prepared for the Durham Young Researchers Integrability School, organised by the GATIS network. This is part of a collection of lecture notes.

  1. FE Simulation Models for Hot Stamping an Automobile Component with Tailor-Welded High-Strength Steels

    Science.gov (United States)

    Tang, Bingtao; Wang, Qiaoling; Wei, Zhaohui; Meng, Xianju; Yuan, Zhengjun

    2016-05-01

    Ultra-high-strength in sheet metal parts can be achieved with hot stamping process. To improve the crash performance and save vehicle weight, it is necessary to produce components with tailored properties. The use of tailor-welded high-strength steel is a relatively new hot stamping process for saving weight and obtaining desired local stiffness and crash performance. The simulation of hot stamping boron steel, especially tailor-welded blanks (TWBs) stamping, is more complex and challenging. Information about thermal/mechanical properties of tools and sheet materials, heat transfer, and friction between the deforming material and the tools is required in detail. In this study, the boron-manganese steel B1500HS and high-strength low-alloy steel B340LA are tailor welded and hot stamped. In order to precisely simulate the hot stamping process, modeling and simulation of hot stamping tailor-welded high-strength steels, including phase transformation modeling, thermal modeling, and thermal-mechanical modeling, is investigated. Meanwhile, the welding zone of tailor-welded blanks should be sufficiently accurate to describe thermal, mechanical, and metallurgical parameters. FE simulation model using TWBs with the thickness combination of 1.6 mm boron steel and 1.2 mm low-alloy steel is established. In order to evaluate the mechanical properties of the hot stamped automotive component (mini b-pillar), hardness and microstructure at each region are investigated. The comparisons between simulated results and experimental observations show the reliability of thermo-mechanical and metallurgical modeling strategies of TWBs hot stamping process.

  2. Davidson and classical pragmatism

    Directory of Open Access Journals (Sweden)

    Paula Rossi

    2007-06-01

    Full Text Available In this paper I wish to trace some connections between Donald Davidson's work (1917-2003 and two major representatives of the classical pragmatist movement: Charles S. Peirce (1839-1914 and William James (1842-1910. I will start with a basic characterization of classical pragmatism; then, I shall examine certain conceptions in Peirce's and James' pragmatism, in order to establish affinities with Davidson´s thought. Finally, and bearing in mind the previous con-nections, I will reflect briefly on the relevance –often unrecognized- of classical pragmatist ideas in the context of contemporary philosophi-cal discussions.

  3. On Noncommutative Classical Mechanics

    CERN Document Server

    Djemai, A E F

    2003-01-01

    In this work, I investigate the noncommutative Poisson algebra of classical observables corresponding to a proposed general Noncommutative Quantum Mechanics, \\cite{1}. I treat some classical systems with various potentials and some Physical interpretations are given concerning the presence of noncommutativity at large scales (Celeste Mechanics) directly tied to the one present at small scales (Quantum Mechanics) and its possible relation with UV/IR mixing.

  4. Davidson and classical pragmatism

    OpenAIRE

    Paula Rossi

    2007-01-01

    In this paper I wish to trace some connections between Donald Davidson's work (1917-2003) and two major representatives of the classical pragmatist movement: Charles S. Peirce (1839-1914) and William James (1842-1910). I will start with a basic characterization of classical pragmatism; then, I shall examine certain conceptions in Peirce's and James' pragmatism, in order to establish affinities with Davidson´s thought. Finally, and bearing in mind the previous con-nections, I will reflect brie...

  5. Modeling and Simulating Material Behavior during Hot Blank - Cold Die (HB-CD) Stamping of Aluminium Alloy Sheets

    Science.gov (United States)

    Zhang, Nan; Abu-Farha, Fadi

    2016-08-01

    Hot blank - cold die (HB-CD) stamping, non-isothermal hot stamping, of aluminium alloy sheets offers great opportunities for high production rates at low cost, while overcoming limited material formability issues. Yet developing an accurate model that can describe the complex material behavior over the wide ranging conditions of HB-CD stamping (temperatures ranging between 25 and 350 °C) is challenging. Moreover, validation of the developed models under transient conditions is problematic. This work presents he results of a comprehensive characterization, material modeling, FE simulation and experimental validation effort to capture the behavior of an aluminium alloy sheet during HB-CD stamping. In particular, we highlight the integration between temperature measurements (thermography) and strain measurements (digital image correlation) for the accurate validation of model predictions of non-isothermal material deformation.

  6. Effect of Contact Pressure during Quenching on Microstructures and Mechanical Properties of Hot-stamping Parts

    Institute of Scientific and Technical Information of China (English)

    Zheng-wei GU; Meng-meng L; Guan-han LU; Xin LI; Hong XU

    2015-01-01

    An experimental apparatus with cooling system and pressure-adj ustment assembly for simulating quench-ing was constructed to investigate the effect of contact pressure on the microstructures and mechanical properties of hot-stamping parts.Qualitative and quantitative analyses of the microstructures of the as-quenched parts were con-ducted;moreover,hardness and tensile tests were performed to measure their mechanical properties.The results in-dicated that contact pressure during quenching strongly affected the structures and performances of hot-stamping components.An excessive low contact pressure led to insufficient martensitic transformation.The critical contact pressure for complete martensitic transformation for 4.0 mm 22MnB5 steel was 0.4 MPa when the temperature of the coolant was 20 ℃.However,in consideration of the efficiency of practical production,a contact pressure higher than 1.25 MPa is recommended.

  7. Finite Element Modelling Full Vehicle Side Impact with Ultrahigh Strength Hot Stamped Steels

    Science.gov (United States)

    Taylor, T.; Fourlaris, G.; Cafolla, J.

    2016-10-01

    "Hot stamped boron steel" 22MnB5 has been imperative in meeting the automotive industry's demand for materials exhibiting higher tensile strength in the final component. In this paper, the crash performance of three experimental grades developed for automotive hot stamping technologies, exhibiting wider tensile property ranges than 22MnB5, was validated by finite element modelling full vehicle side impact with the experimental material data applied to the B-pillar reinforcement. The superior anti-intrusive crash performance of grade 38MnB5 was demonstrated, with 11 mm less intrusion of the B-pillar reinforcement compared to 22MnB5. Moreover, the superior "impact-energy absorptive" crash performance of grade 15MnCr5 was demonstrated, with 0.15 kJ greater impact-energy absorption by the B-pillar reinforcement compared to 22MnB5.

  8. Time Stamp Attack on Wide Area Monitoring System in Smart Grid

    CERN Document Server

    Zhang, Zhenghao; Li, Husheng; Pei, Changxing

    2011-01-01

    Security becomes an extremely important issue in smart grid. To maintain the steady operation for smart power grid, massive measurement devices must be allocated widely among the power grid. Previous studies are focused on false data injection attack to the smart grid system. In practice, false data injection attack is not easy to implement, since it is not easy to hack the power grid data communication system. In this paper, we demonstrate that a novel time stamp attack is a practical and dangerous attack scheme for smart grid. Since most of measurement devices are equipped with global positioning system (GPS) to provide the time information of measurements, it is highly probable to attack the measurement system by spoofing the GPS. By employing the real measurement data in North American Power Grid, simulation results demonstrate the effectiveness of the time stamp attack on smart grid.

  9. A Study on Basic Characteristics of Hollow Piezoelectric Actuator for Driving Nanoscale Stamp

    International Nuclear Information System (INIS)

    Nanoimprint lithography has been actively investigated. This method can replicate a nanopatterned master stamp onto a thin polymer film on a silicon substrate and so on. In this study, a square-shaped hollow piezoelectric actuator is presented, which is newly developed. This actuator is used for driving a nanoscale stamp in nanoimprint lithography instead of a conventional electric motor. The fabricated prototype actuator has 95 layers and side lengths of 23 mm and 18 mm for the outer and inner squares, respectively. By adopting a novel process instead of the conventional forming process for fabricating a one-layer actuator, the one-layer is composed of four rectangular segments produced by sawing a ceramic film with a thickness of 0.3 mm. The basic characteristics on displacement and generation force of the fabricated prototype actuator are experimentally investigated. Furthermore, the displacement characteristics obtained by using a PI controller are tested and discussed

  10. The Role of Functional Form in Estimating the Effect of a Cash-Only Food Stamp Program

    OpenAIRE

    Levedahl, J. William

    1991-01-01

    Larger marginal impacts on household food spending come from food stamps than from equivalent cash income, according to previous studies. These studies have been limited, however, in using food expenditure equations that are linear in the coefficients, placing prior constraints on the estimated marginal propensities to spend (MPS) from cash and from stamps. This article re-examines the earlier MPS estimates in light of a more general and flexible food expenditure equation, comparing estimates...

  11. Anisotropic behaviour law for sheets used in stamping: A comparative study of steel and aluminium

    OpenAIRE

    Sinou, Jean-Jacques; Macquaire, Bruno

    2003-01-01

    International audience For a car manufacturer, reducing the weight of vehicles is an obvious aim. Replacing steel by aluminium moves towards that goal. Unfortunately, aluminium's stamping numerical simulation results are not yet as reliable as those of steel. Punch-strength and spring-back phenomena are not correctly described. This study on aluminium validates the behaviour law Hill 48 quadratic yield criterion with both isotropic and kinematic hardening. It is based on the yield surface ...

  12. Optimization of Process Parameters of Stamping Forming of the Automotive Lower Floor Board

    OpenAIRE

    Ma, Guoying; Huang, Binbing

    2014-01-01

    There are many process parameters which have great effect on the forming quality of parts during automobile panel stamping forming process. This paper took automotive lower floor board as the research object; the forming process was analyzed by finite element simulation using Dynaform. The influences of four main process parameters including BHF (blank holder force), die corner radius, friction coefficient, and die clearance on the maximum thinning rate and the maximum thickening rate were re...

  13. Food Safety Knowledge and Practices of Older Adult Participants of the Food Stamp Nutrition Education Program

    OpenAIRE

    Rasnake, Crystal Michelle

    2000-01-01

    The purpose of this study was to determine food safety knowledge and practices of older adult participants in the Food Stamp Nutrition Education Program (FSNEP) in Virginia. One hundred and sixty-five FSNEP participants were assigned to two possible intervention groups, group one received the food safety lesson from the Healthy Futures Series currently used in FSNEP, while group two received the food safety lesson plus an additional food safety video. FSNEP participants completed food safet...

  14. Low temperature high density plasma nitriding of stainless steel molds for stamping of oxide glasses

    Directory of Open Access Journals (Sweden)

    Aizawa Tatsuhiko

    2016-01-01

    Full Text Available Various kinds of stainless steels have been widely utilized as a die for mold- and direct-stamping processes of optical oxide glasses. Since they suffered from high temperature transients and thermal cycles in practice, they must be surface-treated by dry and wet coatings, or, by plasma nitriding. Martensitic stainless steel mold was first wet plated by the nickel phosphate (NiP, which was unstable at the high temperature stamping condition; and, was easy to crystalize or to fracture by itself. This issue of nuisance significantly lowered the productivity in fabrication of optical oxide-glass elements. In the present paper, the stainless steel mold was surface-treated by the low-temperature plasma nitriding. The nitrided layer by this surface modification had higher nitrogen solute content than 4 mass%; the maximum solid-solubility of nitrogen is usually 0.1 mass% in the equilibrium phase diagram. Owing to this solid-solution with high nitrogen concentration, the nitrided layer had high hardness over 1400 HV within its thickness of 50 μm without any formation of nitrides after plasma nitriding at 693 K for 14.4 ks. This plasma-nitrided mold was utilized for mold-stamping of two colored oxide glass plates at 833 K; these plates were successfully deformed and joined into a single glass plate by this stamping without adhesion or galling of oxide glasses onto the nitrided mold surface.

  15. Establishment of the Comprehensive Evaluation System of Cold Stamping Die Quality

    Institute of Scientific and Technical Information of China (English)

    LU Xiao-chun; GUO Sheng; RUAN Feng

    2006-01-01

    A comprehensive evaluation system of die quality,a multiplayer hierarchical amendment index system according to the characteristics of cold stamping die production,an evaluation standard referring to the technique and design rules ofdies,and a scientific evaluation by using the multiplayer hierarchical and the fuzzy comprehensive evaluation methods are presented in this paper.The applications show that the system can be used to evaluate the die quality objectively,fairly,and reasonably.

  16. Nowcasting and Forecasting the Monthly Food Stamps Data in the US using Online Search Data

    OpenAIRE

    Dean Fantazzini

    2014-01-01

    We propose the use of Google online search data for nowcasting and forecasting the number of food stamps recipients. We perform a large out-of-sample forecasting exercise with almost 3000 competing models with forecast horizons up to 2 years ahead, and we show that models including Google search data statistically outperform the competing models at all considered horizons. These results hold also with several robustness checks, considering alternative keywords, a falsification test, different...

  17. Watchword-Oriented and Time-Stamped Algorithms for Tamper-Proof Cloud Provenance Cognition

    OpenAIRE

    Imran, Asif; Nahar, Nadia; Sakib, Kazi

    2014-01-01

    Provenance is derivative journal information about the origin and activities of system data and processes. For a highly dynamic system like the cloud, provenance can be accurately detected and securely used in cloud digital forensic investigation activities. This paper proposes watchword oriented provenance cognition algorithm for the cloud environment. Additionally time-stamp based buffer verifying algorithm is proposed for securing the access to the detected cloud provenance. Performance an...

  18. Review: A review on classical and atypical scrapie in caprine: Prion protein gene polymorphisms and their role in the disease.

    Science.gov (United States)

    Curcio, L; Sebastiani, C; Di Lorenzo, P; Lasagna, E; Biagetti, M

    2016-10-01

    Scrapie is a naturally occurring transmissible spongiform encephalopathy in sheep and goat. It has been known for ~250 years and is characterised by the accumulation of an abnormal isoform of a host-encoded prion protein that leads to progressive neurodegeneration and death. Scrapie is recognised in two forms, classical and atypical scrapie. The susceptibility to both types of scrapie is influenced by polymorphisms of the prion protein gene (PRNP). Sheep susceptibility or resistance to classical scrapie is strongly regulated by the polymorphisms at codons 136, 154 and 171 of the PRNP. The genetic role in atypical scrapie in sheep has been defined by polymorphisms at codons 141, 154 and 171, which are associated with different degrees of risk in the occurrence of the ovine disease. Progress has been achieved in the prevention of scrapie in sheep due to efficient genetic breeding programmes based on eradication and control of the disease. In Europe, the success of these programmes has been verified by applying eradication and genetic selection plans. In general terms, the ovine selection plans aim to eliminate and reduce the susceptible allele and to enrich the resistant allele ARR. During outbreaks all susceptible animals are slaughtered, only ARR/ARR resistant rams and sheep and semi-resistant females are preserved. In the occurrence of scrapie positive goats a complete cull of the flock (stamping out) is performed with great economic loss and severe risk of extinction for the endangered breeds. The ability to select scrapie-resistant animals allows to define new breeding strategies aimed to boost genetic progress while reducing costs during scrapie outbreaks. Allelic variants of PRNP can be protective for caprine scrapie, and the knowledge of their distribution in goats has become very important. Over the past few years, the integration of genetic information on goat populations could be used to make selection decisions, commonly referred to as genetic selection

  19. Neuropathology in classical and variant ataxia-telangiectasia.

    NARCIS (Netherlands)

    Verhagen, M.M.M.; Martin, J.J.; Deuren, M. van; Ceuterick-de Groote, C.; Weemaes, C.M.R.; Kremer, B.; Taylor, M.A.; Willemsen, M.A.A.P.; Lammens, M.M.Y.

    2012-01-01

    Ataxia-telangiectasia (A-T) is classically characterized by progressive neurodegeneration, oculocutaneous telangiectasia, immunodeficiency and elevated alpha-fetoprotein levels. Some patients, classified as variant A-T, exhibit a milder clinical course. In the latter patients extrapyramidal symptoms

  20. Multi-objective optimization of stamping forming process of head using Pareto-based genetic algorithm

    Institute of Scientific and Technical Information of China (English)

    周杰; 卓芳; 黄磊; 罗艳

    2015-01-01

    To obtain the optimal process parameters of stamping forming, finite element analysis and optimization technique were integrated via transforming multi-objective issue into a single-objective issue. A Pareto-based genetic algorithm was applied to optimizing the head stamping forming process. In the proposed optimal model, fracture, wrinkle and thickness varying are a function of several factors, such as fillet radius, draw-bead position, blank size and blank-holding force. Hence, it is necessary to investigate the relationship between the objective functions and the variables in order to make objective functions varying minimized simultaneously. Firstly, the central composite experimental (CCD) with four factors and five levels was applied, and the experimental data based on the central composite experimental were acquired. Then, the response surface model (RSM) was set up and the results of the analysis of variance (ANOVA) show that it is reliable to predict the fracture, wrinkle and thickness varying functions by the response surface model. Finally, a Pareto-based genetic algorithm was used to find out a set of Pareto front, which makes fracture, wrinkle and thickness varying minimized integrally. A head stamping case indicates that the present method has higher precision and practicability compared with the“trial and error”procedure.

  1. Wheeling Charges Methodology for Deregulated Electricity Markets using Tracing-based Postage Stamp Methods

    Directory of Open Access Journals (Sweden)

    M.Y. Hassan

    2011-12-01

    Full Text Available MW-mile and Postage-stamp methods is traditionally used by electric utilities to determine a fixed transmission cost among users of firm transmission service. MW-Mile method is charging the users by determining the actual paths the power follows through the network. However, this method is not sufficient to recover the total transmission system cost. To recover the total transmission system cost, the Postage Stamp Method is adopted. This method is simple but its main drawback is that the charges paid by each user do not reflect the actual use of the network but based on the average usage of the entire network. This paper proposes a new wheeling charges methodology using tracing-based postage stamp methods. The proposed method allocates transmission costs among the generators proportional to the total power delivered to the load through transmission lines. The proposed method incorporates with generalised generation distribution factors to trace the contribution of each generator to the line flow. One unique feature of the proposed method is the consideration of the local load on the power flow allocation. Two case studies of 3-bus and IEEE 14-bus systems are used to illustrate the proposed method. Results show that the proposed method provides fair and equitable wheeling charges to generators reflecting the actual usage of the transmission system.

  2. Study of front bumper process on the basis of hot stamping

    Institute of Scientific and Technical Information of China (English)

    Wang Xiaona; Xiong Fei; Jin Jianwei

    2014-01-01

    The fitting method is used for obtaining the constitutive relation of ultra-high strength steel in this pa-per. At the same time,the forming limit of material is researched under different deformation conditions. Through experiments,the paper obtains stress-strain curve under different deformation temperatures and strain rates. On the basis of experimental data,the constitutive relation model is established which can reflect the de-formation capacity of ultra-high strength steel during process of hot stamping. Combining with finite element simulation results of hot stamping by the commercial software AUTOFORM,transfer path of load and match-ing law of strength,the paper determines the design criteria and forming process requirements of parts manufac-tured by hot stamping. Through setting different process parameters,such as punch velocity and friction coeffi-cient,and blank shape,the paper finds that process parameters and blank shape have an essential effect on the quality of parts.

  3. Experimental and Numerical Method for the Analysis of Warm Titanium Sheet Stamping of an Automotive Component

    Directory of Open Access Journals (Sweden)

    Antonio Fiorentino

    2015-01-01

    Full Text Available Product design involves many aspects as geometry and material or mechanical requirements that have to be chosen on the base of the part requirements. Manufacturing process is the link between them representing a fundamental aspect of the product design process. Designers and technicians have a consolidated set of tools and knowledge based on long time experience, but the request of more new performing products characterized by more complex geometries or harder to form materials as Titanium alloys stimulated the use of numerical models. They allow us to study the product feasibility but they require reliable inputs for their development and validation. The present research focuses on sheet stamping processes and proposes a methodology that uses the Nakazima test to characterize the formability of the material and to develop and validate the model. In particular, the method is applied to cold (20°C and warm (300°C stamping of a complex automotive component made of CP Titanium. After characterizing the material and validating the model at the different temperatures, the stamping process is studied and results are compared. In particular, this approach allowed joining the experimental tests required to develop and validate the model, therefore reducing the resources required for the product design.

  4. An Intelligent Master Model of Computer Aided Process Planning for Large Complicated Stampings

    Institute of Scientific and Technical Information of China (English)

    Zheng Jinqiao; Wang Yilin; Li Zhigang

    2005-01-01

    Process planning for large complicated stampings is more complicated, illegible and multiform than that for common stampings.In this paper, an intelligent master model of computer aided process planning (CAPP) for large complicated stampings has been developed based on knowledge based engineering (KBE) and feature technology. This innovative model consists of knowledge base ( KB), process control structure (PCS), process information model (PIM), multidisciplinary design optimization (MDO), model link environment (MLE) and simulation engine (SE), to realize process planning, optimization, simulation and management integrated to complete intelligent CAPP system. In this model, KBE provides knowledge base, open architecture and knowledge reuse ability to deal with the multi-domain and multi-expression of process knowledge, and forms an integrated environment. With PIM,all the knowledge consisting of objects, constraints, experience and decision-makings is carried by object-oriented method dynamically for knowledge-reasoning. PCS makes dynamical knowledge modified and updated timely and accordingly. MLE provides sev eral methods to make CAPP system associated and integrated. SE provides a programmable mechanism to interpret simulation course and result. Meanwhile, collaborative optimization, one method of MDO, is imported to deal with the optimization distributed for multiple purposes. All these make CAPP system integrated and open to other systems, such as die design and manufacturing system.

  5. Research on the Micro Sheet Stamping Process Using Plasticine as Soft Punch

    Directory of Open Access Journals (Sweden)

    Xiao Wang

    2014-05-01

    Full Text Available Plasticine is widely used in the analysis of metal forming processes, due to its excellent material flow ability. In this study, plasticine is used as the soft punch to fabricate array micro-channels on metal sheet in the micro sheet stamping process. This is because plasticine can produce a large material flow after being subjected to force and through the material flow, the plasticine can cause the sheet to fill into the micro-channels of the rigid die, leading to the generation of micro-channels in the sheet. The distribution of array micro-channels was investigated as well as the influence of load forces on the sheet deformations. It was found that the depth of micro-channels increases as the load force increases. When the load force reaches a certain level, a crack can be observed. The micro sheet stamping process was also investigated by the method of numerical simulation. The obtained experimental and numerical results for the stamping process showed that they were in good agreement. Additionally, from the simulation results, it can be seen that the corner region of the micro-channel-shape work piece has a risk to crack due to the existence of maximum von Mises stress and significant thinning.

  6. StaMPS Improvement for Deformation Analysis in Mountainous Regions: Implications for the Damavand Volcano and Mosha Fault in Alborz

    Directory of Open Access Journals (Sweden)

    Sanaz Vajedian

    2015-06-01

    Full Text Available Interferometric Synthetic Aperture Radar (InSAR capability to detect slow deformation over terrain areas is limited by temporal decorrelation, geometric decorrelation and atmospheric artefacts. Multitemporal InSAR methods such as Persistent Scatterer (PS-InSAR and Small Baseline Subset (SBAS have been developed to deal with various aspects of decorrelation and atmospheric problems affecting InSAR observations. Nevertheless, the applicability of both PS-InSAR and SBAS in mountainous regions is still challenging. Correct phase unwrapping in both methods is hampered due to geometric decorrelation in particular when using C-band SAR data for deformation analysis. In this paper, we build upon the SBAS method implemented in StaMPS software and improved the technique, here called ISBAS, to assess tectonic and volcanic deformation in the center of the Alborz Mountains in Iran using both Envisat and ALOS SAR data. We modify several aspects within the chain of the processing including: filtering prior to phase unwrapping, topographic correction within three-dimensional phase unwrapping, reducing the atmospheric noise with the help of additional GPS data, and removing the ramp caused by ionosphere turbulence and/or orbit errors to better estimate crustal deformation in this tectonically active region. Topographic correction is done within the three-dimensional unwrapping in order to improve the phase unwrapping process, which is in contrast to previous methods in which DEM error is estimated before/after phase unwrapping. Our experiments show that our improved SBAS approach is able to better characterize the tectonic and volcanic deformation in the center of the Alborz region than the classical SBAS. In particular, Damavand volcano shows an average uplift rate of about 3 mm/year in the year 2003–2010. The Mosha fault illustrates left-lateral motion that could be explained with a fault that is locked up to 17–18 km depths and slips with 2–4 mm

  7. Classically-Controlled Quantum Computation

    OpenAIRE

    Perdrix, Simon; Jorrand, Philippe

    2004-01-01

    Quantum computations usually take place under the control of the classical world. We introduce a Classically-controlled Quantum Turing Machine (CQTM) which is a Turing Machine (TM) with a quantum tape for acting on quantum data, and a classical transition function for a formalized classical control. In CQTM, unitary transformations and measurements are allowed. We show that any classical TM is simulated by a CQTM without loss of efficiency. The gap between classical and quantum computations, ...

  8. Classical Concepts in Quantum Programming

    Science.gov (United States)

    Ömer, Bernhard

    2005-07-01

    The rapid progress of computer technology has been accompanied by a corresponding evolution of software development, from hardwired components and binary machine code to high level programming languages, which allowed to master the increasing hardware complexity and fully exploit its potential. This paper investigates, how classical concepts like hardware abstraction, hierarchical programs, data types, memory management, flow of control, and structured programming can be used in quantum computing. The experimental language QCL will be introduced as an example, how elements like irreversible functions, local variables, and conditional branching, which have no direct quantum counterparts, can be implemented, and how nonclassical features like the reversibility of unitary transformation or the nonobservability of quantum states can be accounted for within the framework of a procedural programming language.

  9. Elementary classical hydrodynamics

    CERN Document Server

    Chirgwin, B H; Langford, W J; Maxwell, E A; Plumpton, C

    1967-01-01

    Elementary Classical Hydrodynamics deals with the fundamental principles of elementary classical hydrodynamics, with emphasis on the mechanics of inviscid fluids. Topics covered by this book include direct use of the equations of hydrodynamics, potential flows, two-dimensional fluid motion, waves in liquids, and compressible flows. Some general theorems such as Bernoulli's equation are also considered. This book is comprised of six chapters and begins by introducing the reader to the fundamental principles of fluid hydrodynamics, with emphasis on ways of studying the motion of a fluid. Basic c

  10. Classical mechanics with Maxima

    CERN Document Server

    Timberlake, Todd Keene

    2016-01-01

    This book guides undergraduate students in the use of Maxima—a computer algebra system—in solving problems in classical mechanics. It functions well as a supplement to a typical classical mechanics textbook. When it comes to problems that are too difficult to solve by hand, computer algebra systems that can perform symbolic mathematical manipulations are a valuable tool. Maxima is particularly attractive in that it is open-source, multiple-platform software that students can download and install free of charge. Lessons learned and capabilities developed using Maxima are easily transferred to other, proprietary software.

  11. Classical Holographic Codes

    CERN Document Server

    Brehm, Enrico M

    2016-01-01

    In this work, we introduce classical holographic codes. These can be understood as concatenated probabilistic codes and can be represented as networks uniformly covering hyperbolic space. In particular, classical holographic codes can be interpreted as maps from bulk degrees of freedom to boundary degrees of freedom. Interestingly, they are shown to exhibit features similar to those expected from the AdS/CFT correspondence. Among these are a version of the Ryu-Takayanagi formula and intriguing properties regarding bulk reconstruction and boundary representations of bulk operations. We discuss the relation of our findings with expectations from AdS/CFT and, in particular, with recent results from quantum error correction.

  12. Classic Problems of Probability

    CERN Document Server

    Gorroochurn, Prakash

    2012-01-01

    "A great book, one that I will certainly add to my personal library."—Paul J. Nahin, Professor Emeritus of Electrical Engineering, University of New Hampshire Classic Problems of Probability presents a lively account of the most intriguing aspects of statistics. The book features a large collection of more than thirty classic probability problems which have been carefully selected for their interesting history, the way they have shaped the field, and their counterintuitive nature. From Cardano's 1564 Games of Chance to Jacob Bernoulli's 1713 Golden Theorem to Parrondo's 1996 Perplexin

  13. Learning Classical Music Club

    CERN Multimedia

    Learning Classical Music Club

    2010-01-01

    There is a new CERN Club called “Learning Classical Music at CERN”. We are aiming to give classical music lessons for different instruments (see link) for students from 5 to 100 years old. We are now ready to start our activities in the CERN barracks. We are now in the enrollment phase and hope to start lessons very soon ! Club info can be found in the list of CERN Club: http://user.web.cern.ch/user/Communication/SocialLifeActivities/Clubs/Clubs.html Salvatore Buontempo Club President

  14. Understanding Food Stamp Program Participation Among Female-Headed Households: Has It Been Affected By Participation In The AFDC/TANF Program?

    OpenAIRE

    Shangguan, Zhaoyun

    2000-01-01

    The caseloads of food stamp program and welfare program experienced sharp drops among non-metropolitan single female-headed families with children (SFHFwC) after welfare reform in 1996. There is concern that leaving welfare program has led to nonparticipation in food stamp program due to multiple reasons. This study conducts an empirical analysis of non-metropolitan SFHFwC's participation in food stamp program and welfare program, using the 1993 and 1999 CPS data. Results from using reduce...

  15. Strong Coupling and Classicalization

    CERN Document Server

    Dvali, Gia

    2016-01-01

    Classicalization is a phenomenon in which a theory prevents itself from entering into a strong-coupling regime, by redistributing the energy among many weakly-interacting soft quanta. In this way, the scattering process of some initial hard quanta splits into a large number of soft elementary processes. In short, the theory trades the strong coupling for a high-multiplicity of quanta. At very high energies, the outcome of such a scattering experiment is a production of soft states of high occupation number that are approximately classical. It is evident that black hole creation in particle collision at super-Planckian energies is a result of classicalization, but there is no a priory reason why this phenomenon must be limited to gravity. If the hierarchy problem is solved by classicalization, the LHC has a chance of detecting a tower of new resonances. The lowest-lying resonances must appear right at the strong coupling scale in form of short-lived elementary particles. The heavier members of the tower must b...

  16. Nuclear motion is classical

    CERN Document Server

    Frank, Irmgard

    2016-01-01

    The notion from ab-initio molecular dynamics simulations that nuclear motion is best described by classical Newton dynamics instead of the time-dependent Schr{\\"o}dinger equation is substantiated. In principle a single experiment should bring clarity. Caution is however necessary, as temperature dependent effects must be eliminated when trying to determine the existence of a zero-point energy.

  17. Classics in What Sense?

    Science.gov (United States)

    Camic, Charles

    2008-01-01

    They seem the perfect bookends for the social psychologist's collection of "classics" of the field. Two volumes, nearly identical in shape and weight and exactly a century old in 2008--each professing to usher "social psychology" into the world as they both place the hybrid expression square in their titles but then proceed to stake out the field…

  18. Classical galactosaemia revisited

    NARCIS (Netherlands)

    A.M. Bosch

    2006-01-01

    Classical galactosaemia (McKusick 230400) is an: autosomal recessive disorder of galactose metabolism, caused by a deficiency of the enzyme galactose-1-phosphate uridyltransferase (GALT; EC 2.7.712). Most patients present in the neonatal period, after ingestion of galactose, with jaundice, hepatospl

  19. The Classical Cake Problem

    Science.gov (United States)

    Nelson, Norman N.; Fisch, Forest N.

    1973-01-01

    Discussed are techniques of presentation and solution of the Classical Cake Problem. A frosted cake with a square base is to be cut into n pieces with the volume of cake and frosting the same for each piece. Needed are minimal geometric concepts and the formula for the volume of a prism. (JP)

  20. Classicism and Romanticism.

    Science.gov (United States)

    Huddleston, Gregory H.

    1993-01-01

    Describes one teacher's methods for introducing to secondary English students the concepts of Classicism and Romanticism in relation to pictures of gardens, architecture, music, and literary works. Outlines how the unit leads to a writing assignment based on collected responses over time. (HB)

  1. Classical and quantum satisfiability

    CERN Document Server

    de Araújo, Anderson; 10.4204/EPTCS.81.6

    2012-01-01

    We present the linear algebraic definition of QSAT and propose a direct logical characterization of such a definition. We then prove that this logical version of QSAT is not an extension of classical satisfiability problem (SAT). This shows that QSAT does not allow a direct comparison between the complexity classes NP and QMA, for which SAT and QSAT are respectively complete.

  2. Classical Mechanics Laboratory

    Science.gov (United States)

    Brosing, Juliet W.

    2006-12-01

    At Pacific University we have included a lab with our upper division Classical Mechanics class. We do a combination of physical labs (air resistance, harmonic motion, amusement park physics), Maple labs (software), and projects. Presentation of some of the labs, results and challenges with this course will be included.

  3. Classical Mythology. Fourth Edition.

    Science.gov (United States)

    Morford, Mark P. O.; Lenardon, Robert J.

    Designed for students with little or no background in classical literature, this book introduces the Greek and Roman myths of creation, myths of the gods, Greek sagas and local legends, and presents contemporary theories about the myths. Drawing on Homer, Hesiod, Pindar, Vergil, and others, the book provides many translations and paraphrases of…

  4. Children's Classics. Fifth Edition.

    Science.gov (United States)

    Jordan, Alice M.

    "Children's Classics," a 1947 article by Alice M. Jordan reprinted from "The Horn Book Magazine," examines the dynamics and appeal of some of the most famous books for young readers, including "Alice in Wonderland,""The Wind in the Willows,""Robinson Crusoe," and "Andersen's Fairy Tales." Paul Hein's annotated bibliography, a revision of Jordan's…

  5. Classical Ergodicity and Modern Portfolio Theory

    Directory of Open Access Journals (Sweden)

    Geoffrey Poitras

    2015-01-01

    Full Text Available What role have theoretical methods initially developed in mathematics and physics played in the progress of financial economics? What is the relationship between financial economics and econophysics? What is the relevance of the “classical ergodicity hypothesis” to modern portfolio theory? This paper addresses these questions by reviewing the etymology and history of the classical ergodicity hypothesis in 19th century statistical mechanics. An explanation of classical ergodicity is provided that establishes a connection to the fundamental empirical problem of using nonexperimental data to verify theoretical propositions in modern portfolio theory. The role of the ergodicity assumption in the ex post/ex ante quandary confronting modern portfolio theory is also examined.

  6. Research Progress on Differential Methods of Wild-type and Vaccine Virus of Classical Swine Fever%猪瘟野毒与疫苗弱毒鉴别方法的研究进展

    Institute of Scientific and Technical Information of China (English)

    杭柏林; 胡建和; 王青; 史杰; 李杰; 朱王飞

    2011-01-01

    概述了当前鉴别猪瘟强弱毒的几种方法,即免疫学方法(胶体金免疫层析技术、单克隆抗体法和单抗-酶联免疫吸附试验)、核酸检测方法(RT-PCR技术、RT-PCR与其他方法的结合)和动物试验方法.同时提出了鉴别猪瘟强弱毒方法的发展方向.%This paper mainly summarizes differential methods of wild-type and vaccine virus of classical swine fever, which are immunology methods(GICA, McAb and McAb-ELISA), nucleic acid detection methods(RT-PCR and combination approach of RT-PCR with other methods) and animal test method.And the potential development directions of differential methods of wild-type and vaccine virus of classical swine fever are also proposed in this paper.

  7. The progress of monoclonal antibodies applied in the diagnosis of classical swine fever%猪瘟单克隆抗体诊断方法的研究概述

    Institute of Scientific and Technical Information of China (English)

    李娇; 王艳; 唐娜; 沈志强

    2011-01-01

    猪瘟单克隆抗体以其敏感性高、特异性强、能够识别病毒抗原结构的微小差异,同时单抗特有的理化同质性使抗原抗体反应结果便于质量控制、利于标准化和规范化等优点,在猪瘟病毒的诊断以及强弱毒鉴别诊断中得到了广泛应用,显示出良好的应用前景。本文就猪瘟单克隆抗体及其在猪瘟诊断中的应用进展作一综述。%CSF monoclonal antibody of its high sensitivity and specificity,can identify small differences in the structure of viral antigen,while monoclonal antibody specific to the physical and chemical homogeneity of the antigen-antibody reaction results to facilitate quality control,standardization and standardized benefit advantages, such as classical swine fever virus diagnosis and differential diagnosis of attenuated intensity is widely used, showing a good prospect.In this paper, monoelonal antibodies to classical swine fever and its application in diagnosis are reviewed.

  8. Do postage stamps versus pre-paid envelopes increase responses to patient mail surveys? A randomised controlled trial

    Directory of Open Access Journals (Sweden)

    Campbell Malcolm

    2008-05-01

    Full Text Available Abstract Background Studies largely from the market research field suggest that the inclusion of a stamped addressed envelope, rather than a pre-paid business reply, increases the response rate to mail surveys. The evidence that this is also the case regarding patient mail surveys is limited. Methods The aim of this study is to investigate whether stamped addressed envelopes increase response rates to patient mail surveys compared to pre-paid business reply envelopes and compare the relative costs. A sample of 477 initial non-responders to a mail survey of patients attending breast clinics in Greater Manchester between 1/10/2002 – 31/7/2003 were entered into the trial: 239 were randomly allocated to receive a stamped envelope and 238 to receive a pre-paid envelope in with their reminder surveys. Overall cost and per item returned were calculated. Results The response to the stamped envelope group was 31.8% (95% CI: 25.9% – 37.7% compared to 26.9% (21.3% – 32.5% for the pre-paid group. The difference (4.9% 95% CI: -3.3% – 13.1% is not significant at α = 0.05 (χ2 = 1.39; 2 tailed test, d.f. = 1; P = 0.239. The stamped envelopes were cheaper in terms of cost per returned item (£1.20 than the pre-paid envelopes (£1.67. However if the set up cost for the licence to use the pre-paid service is excluded, the cost of the stamped envelopes is more expensive than pre-paid returns (£1.20 versus £0.73. Conclusion Compared with pre-paid business replies, stamped envelopes did not produce a statistically significant increase in response rate to this patient survey. However, the response gain of the stamped strategy (4.9% is similar to that demonstrated in a Cochrane review (5.3% of strategies to increase response to general mail surveys. Further studies and meta analyses of patient responses to mail surveys via stamped versus pre-paid envelopes are needed with sufficient power to detect response gains of this magnitude in a patient population.

  9. The classic project

    International Nuclear Information System (INIS)

    Exchange of data and algorithms among accelerator physics programs is difficult because of unnecessary differences in input formats and internal data structures. To alleviate these problems a C++ class library called CLASSIC (Class Library for Accelerator System Simulation and Control) is being developed with the goal to provide standard building blocks for computer programs used in accelerator design. It includes modules for building accelerator lattice structures in computer memory using a standard input language, a graphical user interface, or a programmed algorithm. It also provides simulation algorithms. These can easily be replaced by modules which communicate with the control system of the accelerator. Exchange of both data and algorithm between different programs using the CLASSIC library should present no difficulty

  10. Randomness: quantum versus classical

    CERN Document Server

    Khrennikov, Andrei

    2015-01-01

    Recent tremendous development of quantum information theory led to a number of quantum technological projects, e.g., quantum random generators. This development stimulates a new wave of interest in quantum foundations. One of the most intriguing problems of quantum foundations is elaboration of a consistent and commonly accepted interpretation of quantum state. Closely related problem is clarification of the notion of quantum randomness and its interrelation with classical randomness. In this short review we shall discuss basics of classical theory of randomness (which by itself is very complex and characterized by diversity of approaches) and compare it with irreducible quantum randomness. The second part of this review is devoted to the information interpretation of quantum mechanics (QM) in the spirit of Zeilinger and Brukner (and QBism of Fuchs et al.) and physics in general (e.g., Wheeler's "it from bit") as well as digital philosophy of Chaitin (with historical coupling to ideas of Leibnitz). Finally, w...

  11. Classical and statistical thermodynamics

    CERN Document Server

    Rizk, Hanna A

    2016-01-01

    This is a text book of thermodynamics for the student who seeks thorough training in science or engineering. Systematic and thorough treatment of the fundamental principles rather than presenting the large mass of facts has been stressed. The book includes some of the historical and humanistic background of thermodynamics, but without affecting the continuity of the analytical treatment. For a clearer and more profound understanding of thermodynamics this book is highly recommended. In this respect, the author believes that a sound grounding in classical thermodynamics is an essential prerequisite for the understanding of statistical thermodynamics. Such a book comprising the two wide branches of thermodynamics is in fact unprecedented. Being a written work dealing systematically with the two main branches of thermodynamics, namely classical thermodynamics and statistical thermodynamics, together with some important indexes under only one cover, this treatise is so eminently useful.

  12. Injuries in classical ballet

    Directory of Open Access Journals (Sweden)

    Adriana Coutinho de Azevedo Guimarães

    2008-06-01

    Full Text Available This study aimed to elucidate what injuries are most likely to occur due to classical ballet practice. The research used national and international bibliography. The bibliography analysis indicated that technical and esthetical demands lead to a practice of non-anatomical movements, causing the ballet dancer to suffer from a number of associated lesions. Most of the injuries are caused by technical mistakes and wrong training. Troubles in children are usually due to trying to force external rotation at hip level and to undue use of point ballet slippers. The commonest lesions are in feet and ankles, followed by knees and hips. The rarest ones are in the upper limbs. These injuries are caused by exercise excess, by repetitions always in the same side and by wrong and early use of point slippers. The study reached the conclusion that incorrect application of classical ballet technique predisposes the dancers to characteristic injuries.

  13. Classical Diophantine equations

    CERN Document Server

    1993-01-01

    The author had initiated a revision and translation of "Classical Diophantine Equations" prior to his death. Given the rapid advances in transcendence theory and diophantine approximation over recent years, one might fear that the present work, originally published in Russian in 1982, is mostly superseded. That is not so. A certain amount of updating had been prepared by the author himself before his untimely death. Some further revision was prepared by close colleagues. The first seven chapters provide a detailed, virtually exhaustive, discussion of the theory of lower bounds for linear forms in the logarithms of algebraic numbers and its applications to obtaining upper bounds for solutions to the eponymous classical diophantine equations. The detail may seem stark--- the author fears that the reader may react much as does the tourist on first seeing the centre Pompidou; notwithstanding that, Sprind zuk maintainsa pleasant and chatty approach, full of wise and interesting remarks. His emphases well warrant, ...

  14. Classical Weyl Transverse Gravity

    CERN Document Server

    Oda, Ichiro

    2016-01-01

    We study various classical aspects of the Weyl transverse (WTDiff) gravity in a general space-time dimension. First of all, we clarify a classical equivalence among three kinds of gravitational theories, those are, the conformally-invariant scalar tensor gravity, Einstein's general relativity and the WTDiff gravity via the gauge fixing procedure. Secondly, we show that in the WTDiff gravity the cosmological constant is a mere integration constant as in unimodular gravity, but it does not receive any radiative corrections unlike the unimodular gravity. A key point in this proof is to construct a covariantly conserved energy-momentum tensor, which is achieved on the basis of this equivalence relation. Thirdly, we demonstrate that the Noether current for the Weyl transformation is identically vanishing, thereby implying that the Weyl symmetry existing in both the conformally-invariant scalar tensor gravity and the WTDiff gravity is a "fake" symmetry. We find it possible to extend this proof to all matter fields,...

  15. Computation in Classical Mechanics

    CERN Document Server

    Timberlake, Todd

    2007-01-01

    There is a growing consensus that physics majors need to learn computational skills, but many departments are still devoid of computation in their physics curriculum. Some departments may lack the resources or commitment to create a dedicated course or program in computational physics. One way around this difficulty is to include computation in a standard upper-level physics course. An intermediate classical mechanics course is particularly well suited for including computation. We discuss the ways we have used computation in our classical mechanics courses, focusing on how computational work can improve students' understanding of physics as well as their computational skills. We present examples of computational problems that serve these two purposes. In addition, we provide information about resources for instructors who would like to include computation in their courses.

  16. Concepts of classical optics

    CERN Document Server

    Strong, John

    2004-01-01

    An intermediate course in optics, this volume explores both experimental and theoretical concepts, offering practical knowledge of geometrical optics that will enhance students' comprehension of any relevant applied science. Its exposition of the concepts of classical optics is presented with a minimum of mathematical detail but presumes some knowledge of calculus, vectors, and complex numbers.Subjects include light as wave motion; superposition of wave motions; electromagnetic waves; interaction of light and matter; velocities and scattering of light; polarized light and dielectric boundarie

  17. Sociology and Classical Liberalism

    OpenAIRE

    KLEIN, Daniel; Stern, Lotta

    2005-01-01

    We advocate the development of a classical-liberal character within professional sociology. The American Sociological Association (ASA) is taken as representative of professional sociology in the United States. We review the ASA’s activities and organizational statements, to show the association’s leftist character. Internal criticism is often very uneasy about leftist domination of the field. We present survey results establishing that, in voting and in policy views, the ASA membership is mo...

  18. Revisiting a Classic

    Science.gov (United States)

    Rogers, Ibram

    2008-01-01

    As a 26-year-old English teacher in 1958, Chinua Achebe had no idea that the book he was writing would become a literary classic, not only in Africa but also throughout the world. He could only try to articulate the feelings he had for his countrymen and women. Achebe had a burning desire to tell the true story of Africa and African humanity. The…

  19. Injuries in classical ballet

    OpenAIRE

    Adriana Coutinho de Azevedo Guimarães; Joseani Paulini Neves Simas

    2008-01-01

    This study aimed to elucidate what injuries are most likely to occur due to classical ballet practice. The research used national and international bibliography. The bibliography analysis indicated that technical and esthetical demands lead to a practice of non-anatomical movements, causing the ballet dancer to suffer from a number of associated lesions. Most of the injuries are caused by technical mistakes and wrong training. Troubles in children are usually due to trying to force external ...

  20. A Classic's New Charm

    Institute of Scientific and Technical Information of China (English)

    WANG HAIRONG

    2010-01-01

    @@ North Korea's Phibada Opera Troupe arrived in Beijing on May3,bringing with it a Korean opera adapted from China's classic novel A Dream of Red Mansions written by Cao Xueqin(around 1715-63),a great novelist of the Qing Dynasty(1644-1911).The troupe,invited by the Chinese Ministry of Culture,is one of the largest performing groups having visited China in recent years.

  1. Diffusion of Classical Solitons

    OpenAIRE

    Dziarmaga, J.; Zakrzewski, W.

    1998-01-01

    We study the diffusion and deformation of classical solitons coupled to thermal noise. The diffusion coefficient for kinks in the $\\phi^4$ theory is predicted up to the second order in $kT$. The prediction is verified by numerical simulations. Multiskyrmions in the vector O(3) sigma model are studied within the same formalism. Thermal noise results in a diffusion on the multisoliton collective coordinate space (moduli space). There are entropic forces which tend, for example, to bind pairs of...

  2. Classical Maxwellian polarization entanglement

    CERN Document Server

    Carroll, John E

    2015-01-01

    An explanation of polarization entanglement is presented using Maxwells classical electromagnetic theory.Two key features are required to understand these classical origins.The first is that all waves diffract and weakly diffracting waves,with a principal direction of propagation in the laboratory frame, travel along that direction at speeds ever so slightly less than c.This allows nontrivial Lorentz transformations that can act on selected forward F waves or selected waves R traveling in the opposite direction to show that both can arise from a single zero momentum frame where all the waves are transverse to the original principal direction.Such F and R waves then both belong to a single relativistic entity where correlations between the two are unremarkable.The second feature requires the avoidance of using the Coulomb gauge.Waves, tending to plane waves in the limit of zero diffraction,can then be shown to be composed of two coupled sets of E and B fields that demonstrate the classical entanglement of F an...

  3. Anisotropic behaviour law for sheets used in stamping: A comparative study of steel and aluminium

    CERN Document Server

    Sinou, Jean-Jacques

    2008-01-01

    For a car manufacturer, reducing the weight of vehicles is an obvious aim. Replacing steel by aluminium moves towards that goal. Unfortunately, aluminium's stamping numerical simulation results are not yet as reliable as those of steel. Punch-strength and spring-back phenomena are not correctly described. This study on aluminium validates the behaviour law Hill 48 quadratic yield criterion with both isotropic and kinematic hardening. It is based on the yield surface and on associated experimental tests (uniaxial test, plane tensile test, plane compression and tensile shearing).

  4. Time Stamp Attack in Smart Grid: Physical Mechanism and Damage Analysis

    CERN Document Server

    Gong, Shuping; Li, Husheng; Dimitrovski, Aleksandar D

    2012-01-01

    Many operations in power grids, such as fault detection and event location estimation, depend on precise timing information. In this paper, a novel time stamp attack (TSA) is proposed to attack the timing information in smart grid. Since many applications in smart grid utilize synchronous measurements and most of the measurement devices are equipped with global positioning system (GPS) for precise timing, it is highly probable to attack the measurement system by spoofing the GPS. The effectiveness of TSA is demonstrated for three applications of phasor measurement unit (PMU) in smart grid, namely transmission line fault detection, voltage stability monitoring and event locationing.

  5. Research on the Micro Sheet Stamping Process Using Plasticine as Soft Punch

    OpenAIRE

    Xiao Wang; Di Zhang; Chunxing Gu; Zongbao Shen; Huixia Liu

    2014-01-01

    Plasticine is widely used in the analysis of metal forming processes, due to its excellent material flow ability. In this study, plasticine is used as the soft punch to fabricate array micro-channels on metal sheet in the micro sheet stamping process. This is because plasticine can produce a large material flow after being subjected to force and through the material flow, the plasticine can cause the sheet to fill into the micro-channels of the rigid die, leading to the generation of micro-ch...

  6. A Mechaniucs Model for Stamping a Sheet on Elastic Die with Large Deformation

    Institute of Scientific and Technical Information of China (English)

    周里群; 李玉平; 等

    2002-01-01

    A semi-analytical method was proposed to solve the mechanics problem of stamping a sheet on elastic die.The sheet was divided into four parts according to its deformation and contact with the punch and elastic die.Analytical solutions were derived individually for each part by using elastic large deflection and plastic large deformation.Solutions were found out with MATLAB by developing a numerical algorithm.Interface forces were obtained by iteration under the compatibility conditions between the neighboring parts of the sheet.Computation shows the method is efficient.

  7. The bucchero childbirth stamp on a late Orientalizing period shard from Poggio Colla

    OpenAIRE

    Perkins, Phil

    2012-01-01

    A unique stamp on a shard of bucchero found at Poggio Colla during the summer of 2011 represents what appears to be a scene of childbirth with a crouching mother delivering a baby. The artifact’s closest Etruscan iconographic parallels—the scenes found on the Archaic relief slabs from Tarquinia—illustrate a crouching female but without the baby. Additional Etruscan scenes combine the crouching pose with a range of animals, suggesting an association with the “Mistress of the Animals.” A surve...

  8. 猪瘟病毒非结构蛋白功能的研究进展%Research Progress on Funtion of Non-structural Proteins of Classical Swine Fever Virus

    Institute of Scientific and Technical Information of China (English)

    陈果亮; 余兴龙

    2013-01-01

    近年来,人们对猪瘟病毒(classical swine fever virus,CSFV)的结构蛋白研究比较透彻,而对非结构蛋白功能的研究相对较少.非结构蛋白对病毒的复制、致病性及对宿主细胞功能的调节均发挥重要作用,这些研究成果对于揭示CSFV的致病机理和新型疫苗的开发具有十分重要的意义.作者全面综述了CSFV非结构蛋白的生物学功能,以期为研究者提供参考.

  9. 甲状腺激素非经典核受体作用途径的研究进展%Progress in the Study of Non-classical Nuclear Receptor Mediated Mechanism of Thyroid Hormone

    Institute of Scientific and Technical Information of China (English)

    王浩华

    2012-01-01

    甲状腺激素是维持机体功能活动的基础性激素,在机体产热、新陈代谢、组织分化和器官发育等方面具有重要的调节作用,一般认为甲状腺激素结合靶细胞核内甲状腺激素受体,启动特异性甲状腺激素应答基因的转录表达,发挥生物学效应.近年来研究发现,某些甲状腺激素引起的生物反应迅速,而且不受基因转录与翻译相关抑制剂的影响,提示甲状腺激素存在非经典核受体作用途径,甲状腺激素介导的非经典核受体作用途径在心肌细胞、人神经胶质细胞、人成纤维细胞和成骨细胞等已被证实.%Thyroid hormone( TH )is a basal hormone which maintains the body's functional activity and has a critical role in energy utilization, metabolism, tissue differentiation and organ growth. It's generally considered that most thyroid hormone effects are mediated by direct transcriptional effects of thyroid hormone bound to nuclear thyroid hormone receptors( TRs ). Recently, a new mechanism of thyroid hormone action is identified which is very rapid and not affected by RNA and protein synthesis inhibitor, indicating a non-classical nuclear receptor mediated action. Besides,the non-classical nuclear receptor mediated action of thyroid hormone has been verified in cardiomyocyte, human glioma,human fibroblasts, osteoblast and so on.

  10. Estimation of Thermal Contact Conductance between Blank and Tool Surface in Hot Stamping Process

    Science.gov (United States)

    Taha, Zahari; Hanafiah Shaharudin, M. A.

    2016-02-01

    In hot stamping, the determination of the thermal contact conductance values between the blank and tool surface during the process is crucial for the purpose of simulating the blank rapid cooling inside the tool using finite element analysis (FEA). The thermal contact conductance value represents the coefficient of the heat transfer at the surface of two solid bodies in contact and is known to be influenced greatly by the applied pressure. In order to estimate the value and its dependency on applied pressure, the process of hot stamping was replicated and simplified into a process of compression of heated flat blank in between the tool at different applied pressure. The temperature of the blank and tool surface were measured by means of thermocouples installed inside the tool. Based on the measured temperature, the thermal contact conductance between the surfaces was calculated using Newton's cooling law equation. The calculated value was then used to simulate the blank cooling inside the tool using FEA commercial software. This paper describes an experimental approach to estimate the thermal contact conductance between a blank made of Boron Steel (USIBOR 1500) and tool made of Tool Steel (STAVAX). Its dependency on applied pressure is also studied and the experimental results were then compared with FEA simulations.

  11. All-silica nanofluidic devices for DNA-analysis fabricated by imprint of sol-gel silica with silicon stamp

    DEFF Research Database (Denmark)

    Mikkelsen, Morten Bo Lindholm; Letailleur, Alban A; Søndergård, Elin;

    2011-01-01

    We present a simple and cheap method for fabrication of silica nanofluidic devices for single-molecule studies. By imprinting sol-gel materials with a multi-level stamp comprising micro- and nanofeatures, channels of different depth are produced in a single process step. Calcination of the imprin......We present a simple and cheap method for fabrication of silica nanofluidic devices for single-molecule studies. By imprinting sol-gel materials with a multi-level stamp comprising micro- and nanofeatures, channels of different depth are produced in a single process step. Calcination...

  12. Temperature distribution of boron-manganese sheet metal blank by induction heating in application for hot stamping

    Institute of Scientific and Technical Information of China (English)

    Xu Ya; Liu Peixing; Wang Zijian; Zhang Yisheng

    2014-01-01

    In order to speed up the production and save more energy in hot stamping process,the induction heating technology as a new effective heating method is considerable. Finite element (FE)-simulation and a se-ries of experiments are carried out to research the temperature homogenization of induction heating with the face inductor. It is found the edge effect has a notable influence on the temperature distribution. Results concer-ning the mechanical properties of the stamped part as well as surface characteristics will be presented and dis-cussed.

  13. On Classical Ideal Gases

    Directory of Open Access Journals (Sweden)

    Laurent Chusseau

    2013-02-01

    Full Text Available We show that the thermodynamics of ideal gases may be derived solely from the Democritean concept of corpuscles moving in vacuum plus a principle of simplicity, namely that these laws are independent of the laws of motion, aside from the law of energy conservation. Only a single corpuscle in contact with a heat bath submitted to a z and t-invariant force is considered. Most of the end results are known but the method appears to be novel. The mathematics being elementary, the present paper should facilitate the understanding of the ideal gas law and of classical thermodynamics even though not-usually-taught concepts are being introduced.

  14. A Classic Through Eternity

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    FIVE years ago, an ancient Chinese air was beamed to outer space as a PR exercise. To humankind, music is a universal language, so the tune seemed an ideal medium for communication with extraterrestrial intelligence. So far there has been no response, but it is believed that the tune will play for a billion years, and eventually be heard and understood. The melody is called High Mountain and Flowing Stream, and it is played on the guqin, a seven-stringed classical musical instrument similar to the zither.

  15. Mechanics classical and quantum

    CERN Document Server

    Taylor, T T

    2015-01-01

    Mechanics: Classical and Quantum explains the principles of quantum mechanics via the medium of analytical mechanics. The book describes Schrodinger's formulation, the Hamilton-Jacobi equation, and the Lagrangian formulation. The author discusses the Harmonic Oscillator, the generalized coordinates, velocities, as well as the application of the Lagrangian formulation to systems that are partially or entirely electromagnetic in character under certain conditions. The book examines waves on a string under tension, the isothermal cavity radiation, and the Rayleigh-Jeans result pertaining to the e

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

    Science.gov (United States)

    Huang, Ying

    The sheet metal stamping process plays an important role in modern industry. With the ever-increasing demand for shape complexity, product quality and new materials, the traditional trial and error method for setting up a sheet metal stamping process is no longer efficient. As a result, the Finite Element Modeling (FEM) method has now been widely used. From a physical point of view, the formability and the quality of a product are influenced by several factors. The design of the product in the initial stage and the motion of the press during the production stage are two of these crucial factors. This thesis focuses on the numerical simulation for these two factors using FEM. Currently, there are a number of commercial FEM software systems available in the market. These software systems are based on an incremental FEM process that models the sheet metal stamping process in small incremental steps. Even though the incremental FEM is accurate, it is not suitable for the initial conceptual design for its needing of detailed design parameters and enormous calculation times. As a result, another type of FEM, called the inverse FEM method or one-step FEM method, has been proposed. While it is less accurate than that of the incremental method, this method requires much less computation and hence, has a great potential. However, it also faces a number of unsolved problems, which limits its application. This motivates the presented research. After the review of the basic theory of the inverse method, a new modified arc-length search method is proposed to find better initial solution. The methods to deal with the vertical walls are also discussed and presented. Then, a generalized multi-step inverse FEM method is proposed. It solves two key obstacles: the first one is to determine the initial solution of the intermediate three-dimensional configurations and the other is to control the movement of nodes so they could only slide on constraint surfaces during the search by

  17. Probability representation of classical states

    NARCIS (Netherlands)

    Man'ko, OV; Man'ko, [No Value; Pilyavets, OV

    2005-01-01

    Probability representation of classical states described by symplectic tomograms is discussed. Tomographic symbols of classical observables which are functions on phase-space are studied. Explicit form of kernel of commutative star-product of the tomographic symbols is obtained.

  18. Numerical calculation of classical and non-classical electrostatic potentials

    CERN Document Server

    Christensen, D; Neyenhuis, B; Christensen, Dan; Durfee, Dallin S.; Neyenhuis, Brian

    2006-01-01

    We present a numerical exercise in which classical and non-classical electrostatic potentials were calculated. The non-classical fields take into account effects due to a possible non-zero photon rest mass. We show that in the limit of small photon rest mass, both the classical and non-classical potential can be found by solving Poisson's equation twice, using the first calculation as a source term in the second calculation. Our results support the assumptions in a recent proposal to use ion interferometry to search for a non-zero photon rest mass.

  19. Classical Physics and Quantum Loops

    Energy Technology Data Exchange (ETDEWEB)

    Barry R. Holstein; John F. Donoghue

    2004-05-01

    The standard picture of the loop expansion associates a factor of h-bar with each loop, suggesting that the tree diagrams are to be associated with classical physics, while loop effects are quantum mechanical in nature. We discuss examples wherein classical effects arise from loop contributions and display the relationship between the classical terms and the long range effects of massless particles.

  20. Fano Interference in Classical Oscillators

    Science.gov (United States)

    Satpathy, S.; Roy, A.; Mohapatra, A.

    2012-01-01

    We seek to illustrate Fano interference in a classical coupled oscillator by using classical analogues of the atom-laser interaction. We present an analogy between the dressed state picture of coherent atom-laser interaction and a classical coupled oscillator. The Autler-Townes splitting due to the atom-laser interaction is analogous to the…

  1. Classical topology and quantum states

    Indian Academy of Sciences (India)

    A P Balachandran

    2001-02-01

    Any two infinite-dimensional (separable) Hilbert spaces are unitarily isomorphic. The sets of all their self-adjoint operators are also therefore unitarily equivalent. Thus if all self-adjoint operators can be observed, and if there is no further major axiom in quantum physics than those formulated for example in Dirac’s ‘quantum mechanics’, then a quantum physicist would not be able to tell a torus from a hole in the ground. We argue that there are indeed such axioms involving observables with smooth time evolution: they contain commutative subalgebras from which the spatial slice of spacetime with its topology (and with further refinements of the axiom, its - and ∞ - structures) can be reconstructed using Gel’fand–Naimark theory and its extensions. Classical topology is an attribute of only certain quantum observables for these axioms, the spatial slice emergent from quantum physics getting progressively less differentiable with increasingly higher excitations of energy and eventually altogether ceasing to exist. After formulating these axioms, we apply them to show the possibility of topology change and to discuss quantized fuzzy topologies. Fundamental issues concerning the role of time in quantum physics are also addressed.

  2. Nucleosynthesis in classical novae

    Science.gov (United States)

    José, Jordi; Hernanz, Margarita; Iliadis, Christian

    2006-10-01

    Classical novae are dramatic stellar explosions with an energy release that is only overcome by supernovae and gamma-ray bursts. These unique cataclysmic events constitute a crucible where different scientific disciplines merge, including astrophysics, nuclear and atomic physics, cosmochemistry, high-energy physics or computer science. In this review, we focus on the nucleosynthesis accompanying nova outbursts. Theoretical predictions are compared with the elemental abundances inferred from observations of the nova ejecta as well as with the isotopic abundance ratios measured in meteorites. Special emphasis is given to the interplay between nova outbursts and the Galactic abundance pattern and on the synthesis of radioactive nuclei for which γ-ray signals are expected. Finally, we analyze the key role played by nuclear physics in our understanding of the nova phenomenon by means of recent experiments and a thorough account of the impact of nuclear uncertainties.

  3. Mechanical Systems, Classical Models

    CERN Document Server

    Teodorescu, Petre P

    2009-01-01

    This third volume completes the Work Mechanical Systems, Classical Models. The first two volumes dealt with particle dynamics and with discrete and continuous mechanical systems. The present volume studies analytical mechanics. Topics like Lagrangian and Hamiltonian mechanics, the Hamilton-Jacobi method, and a study of systems with separate variables are thoroughly discussed. Also included are variational principles and canonical transformations, integral invariants and exterior differential calculus, and particular attention is given to non-holonomic mechanical systems. The author explains in detail all important aspects of the science of mechanics, regarded as a natural science, and shows how they are useful in understanding important natural phenomena and solving problems of interest in applied and engineering sciences. Professor Teodorescu has spent more than fifty years as a Professor of Mechanics at the University of Bucharest and this book relies on the extensive literature on the subject as well as th...

  4. Grassmannization of classical models

    CERN Document Server

    Pollet, Lode; Prokof'ev, Nikolay V; Svistunov, Boris V

    2016-01-01

    Applying Feynman diagrammatics to non-fermionic strongly correlated models with local constraints might seem generically impossible for two separate reasons: (i) the necessity to have a Gaussian (non-interacting) limit on top of which the perturbative diagrammatic expansion is generated by Wick's theorem, and (ii) the Dyson's collapse argument implying that the expansion in powers of coupling constant is divergent. We show that for arbitrary classical lattice models both problems can be solved/circumvented by reformulating the high-temperature expansion (more generally, any discrete representation of the model) in terms of Grassmann integrals. Discrete variables residing on either links, plaquettes, or sites of the lattice are associated with the Grassmann variables in such a way that the partition function (and correlations) of the original system and its Grassmann-field counterpart are identical. The expansion of the latter around its Gaussian point generates Feynman diagrams. A proof-of-principle implement...

  5. Citation classics in epilepsy

    Directory of Open Access Journals (Sweden)

    Maryann Wilson

    2013-01-01

    Full Text Available BACKGROUND: The impact of a scientific article is proportional to the citations it has received. In this study, we set out to identify the most cited works in epileptology in order to evaluate research trends in this field. METHODS: According to the Web of Science database, articles with more than 400 citations qualify as "citation classics". We conducted a literature search on the ISI Web of Science bibliometric database for scientific articles relevant to epilepsy. RESULTS: We retrieved 67 highly cited articles (400 or more citations, which were published in 31 journals: 17 clinical studies, 42 laboratory studies, 5 reviews and 3 classification articles. Clinical studies consisted of epidemiological analyses (n=3, studies on the clinical phenomenology of epilepsy (n=5 – including behavioral and prognostic aspects – and articles focusing on pharmacological (n=6 and non-pharmacological (n=3 treatment. The laboratory studies dealt with genetics (n=6, animal models (n=27, and neurobiology (n=9 – including both neurophysiology and neuropathology studies. The majority (61% of citation classics on epilepsy were published after 1986, possibly reflecting the expansion of research interest in laboratory studies driven by the development of new methodologies, specifically in the fields of genetics and animal models. Consequently, clinical studies were highly cited both before and after the mid 80s, whilst laboratory researches became widely cited after 1990. CONCLUSIONS: Our study indicates that the main drivers of scientific impact in the field of epileptology have increasingly become genetic and neurobiological studies, along with research on animal models of epilepsy. These articles are able to gain the highest numbers of citations in the time span of a few years and suggest potential directions for future research.

  6. Simulating Grover's Quantum Search in a Classical Computer

    OpenAIRE

    Ningtyas, D. K.; Mutiara, A. B.

    2010-01-01

    The rapid progress of computer science has been accompanied by a corresponding evolution of computation, from classical computation to quantum computation. As quantum computing is on its way to becoming an established discipline of computing science, much effort is being put into the development of new quantum algorithms. One of quantum algorithms is Grover algorithm, which is used for searching an element in an unstructured list of N elements with quadratic speed-up over classical algorithms...

  7. The Effect of Food Stamp Nutrition Education on the Food Insecurity of Low-Income Women Participants

    Science.gov (United States)

    Eicher-Miller, Heather A.; Mason, April C.; Abbott, Angela R.; McCabe, George P.; Boushey, Carol J.

    2009-01-01

    Objective: To determine the effect of Food Stamp Nutrition Education (FSNE) in Indiana on participants' food insecurity and food insufficiency. Design: A single-blind randomized design. A randomized experimental group completed 5 FSNE lessons as an intervention between a pre- and posttest, whereas a control group completed a pre- and posttest…

  8. Weld Repair of a Stamped Pressure Vessel in a Radiologically Controlled Zone

    Energy Technology Data Exchange (ETDEWEB)

    Cannell, Gary L. [Fluor Enterprises, Inc.; Huth, Ralph J. [CH2MHill Plateau Remediation Company; Hallum, Randall T. [Fluor Government Group

    2013-08-26

    In September 2012 an ASME B&PVC Section VIII stamped pressure vessel located at the DOE Hanford Site Effluent Treatment Facility (ETF) developed a through-wall leak. The vessel, a steam/brine heat exchanger, operated in a radiologically controlled zone (by the CH2MHill PRC or CHPRC), had been in service for approximately 17 years. The heat exchanger is part of a single train evaporator process and its failure caused the entire system to be shut down, significantly impacting facility operations. This paper describes the activities associated with failure characterization, technical decision making/planning for repair by welding, logistical challenges associated with performing work in a radiologically controlled zone, performing the repair, and administrative considerations related to ASME code requirements.

  9. Construction of Time-Stamped Mobility Map for Path Tracking via Smith-Waterman Measurement Matching

    Directory of Open Access Journals (Sweden)

    Mu Zhou

    2014-01-01

    Full Text Available Path tracking in wireless and mobile environments is a fundamental technology for ubiquitous location-based services (LBSs. In particular, it is very challenging to develop highly accurate and cost-efficient tracking systems applied to the anonymous areas where the floor plans are not available for security and privacy reasons. This paper proposes a novel path tracking approach for large Wi-Fi areas based on the time-stamped unlabeled mobility map which is constructed from Smith-Waterman received signal strength (RSS measurement matching. Instead of conventional location fingerprinting, we construct mobility map with the technique of dimension reduction from the raw measurement space into a low-dimensional embedded manifold. The feasibility of our proposed approach is verified by the real-world experiments in the HKUST campus Wi-Fi networks, sMobileNet. The experimental results prove that our approach is adaptive and capable of achieving an adequate precision level in path tracking.

  10. DNA microarray synthesis by using PDMS molecular stamps (Ⅲ)-- Optimization for the reaction conditions

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    Optimization for the technological processes of fabricating oligonucleotide microarray by the molecular stamping method is studied in this note. Three factors that affect the pressing coupling reactions of the nucleosides are focused on: the stability of the chemical activities of the reaction solutions, the contamination of the remain of the reactive nucleotides among the different spots on the chip, and the influence of the capping reaction on the hybridization result. The experiments show that the acetonitrile solution of tetrazole and nucleoside monomer could maintain sufficient reactive activity for more than 10 h. An effective method has been used and proved to eliminate the residual reactive nucleosides on chip with small molecules containing hydroxyl group. Finally, the capping step-- a regular step in the conventional DNA chemical synthesis can be neglected in our on-chip DNA synthetic process, which would not affect its hybridization results.

  11. Spectral analysis of postage stamps and banknotes from the region of Rijeka in Croatia

    Energy Technology Data Exchange (ETDEWEB)

    Jelovica Badovinac, I., E-mail: ijelov@phy.uniri.h [Department of Physics, University of Rijeka, Omladinska 14, 51000 Rijeka (Croatia); Orlic, N. [Department of Physics, University of Rijeka, Omladinska 14, 51000 Rijeka (Croatia); Lofrumento, C. [Dipartimento di Chimica, Universita di Firenze, Via della Lastruccia 3, 50019 Sesto Fiorentino (Italy); Dobrinic, J. [Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka (Croatia); Orlic, M. [Department of Civil Engineering, Polytechnic of Zagreb, Av. V. Holjevca 15, 10000 Zagreb (Croatia)

    2010-07-21

    Micro-Raman spectroscopy and X-ray emission spectroscopy induced using radioactive source have been applied to analyze two types of samples important for the history of Rijeka, Croatian port on the Adriatic Sea. In this paper we will present study of thirty-three original Hungarian postage stamps issued for Rijeka and overprinted with the word FIUME in 1918, after the World War I and the one-Lira banknotes (one original brown banknote and four trial prints: brown, blue, green and dark green) from Economy bank for Rijeka, Istria and Slovenian Littoral (1945-1947), the so-called Jugolire. This investigation was carried out to determine the differences between the original machine, original hand-made and fake overprints FIUME and to compare the pigments used on original banknote from circulation with the pigments on the trial prints.

  12. Damage and Failure Analysis of AZ31 Alloy Sheet in Warm Stamping Processes

    Science.gov (United States)

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

    2016-07-01

    In this study, a combined experimental-numerical investigation on the failure of AZ31 Mg alloy sheet in the warm stamping process was carried out based on modified GTN damage model which integrated Yld2000 anisotropic yield criterion. The constitutive equations of material were implemented into a VUMAT subroutine for solver ABAQUS/Explicit and applied to the formability analysis of mobile phone shell. The morphology near the crack area was observed using SEM, and the anisotropic damage evolution at various temperatures was simulated. The distributions of plastic strain, damage evolution, thickness, and fracture initiation obtained from FE simulation were analyzed. The corresponding forming limit diagrams were worked out, and the comparison with the experimental data showed a good agreement.

  13. Elastic-plastic solution to stamping thin strip on elastic foundation

    Institute of Scientific and Technical Information of China (English)

    LI Yu-ping; ZHOU Li-qun; ZHOU Yi-chun

    2006-01-01

    An analytical method was proposed to solve the mechanical problems of stamping a thin strip on an elastic foundation.The thin strip was divided into four parts according to its deformation and contact with the punch and the elastic foundation,especially an elastic-plastic part was considered in the deflection of the thin strip. Analytical solutions were derived individually for each part and two models were established with the help of elastic and plastic large deflection 'theories. Compatibility conditions between the neighboring parts of the thin strip constructed the non-linear equation group. Solutions were carried out by programming with a software. The deformation shape, the membrane force, and the moment and shear force of the deformed thin strip were obtained. The results of the two models were compared. The study shows that the method is effective.

  14. Discrimination between authentic and false tax stamps from liquor bottles using laser-induced breakdown spectroscopy and chemometrics

    Energy Technology Data Exchange (ETDEWEB)

    Gonzaga, Fabiano Barbieri, E-mail: fbgonzaga@inmetro.gov.br [Chemical Metrology Division, National Institute of Metrology, Quality and Technology (INMETRO), Av. Nossa Senhora das Graças, 50, Xerém, 25250-020 Duque de Caxias, RJ (Brazil); Rocha, Werickson Fortunato de Carvalho [Chemical Metrology Division, National Institute of Metrology, Quality and Technology (INMETRO), Av. Nossa Senhora das Graças, 50, Xerém, 25250-020 Duque de Caxias, RJ (Brazil); Correa, Deleon Nascimento [Technical–Scientific Police Superintendency, Criminalistic Institute Dr. Octávio Eduardo de Brito Alvarenga—IC-SPTC-SP, 05507-060 São Paulo, SP (Brazil)

    2015-07-01

    This work describes the preliminary application of a compact and low-cost laser-induced breakdown spectroscopy (LIBS) instrument for falsification detection of tax stamps used in alcoholic beverages. The new instrument was based on a diode-pumped passively Q-switched Nd:YLF microchip laser and a mini-spectrometer containing a Czerny–Turner polichromator coupled to a non-intensified, non-gated, and non-cooled 2048 pixel linear sensor array (200 to 850 nm spectral range). Twenty-three tax stamp samples were analyzed by firing laser pulses within two different regions of each sample: a hologram and a blank paper region. For each acquired spectrum, the emitted radiation was integrated for 3000 ms under the continuous application of laser pulses at 100 Hz (integration of 300 plasmas). Principal component analysis (PCA) or hierarchical cluster analysis (HCA) of all emission spectra from the hologram or blank paper region revealed two well-defined groups of authentic and false samples. Moreover, for the hologram data, three subgroups of false samples were found. Additionally, partial least squares discriminant analysis (PLS-DA) was successfully applied for the detection of the false tax stamps using all emission spectra from hologram or blank paper region. The discrimination between the samples was mostly ascribed to different levels of calcium concentration in the samples. - Highlights: • Compact and low-cost laser-induced breakdown spectrometer • Analysis of tax stamps used in alcoholic beverages • Detection of false tax stamps using the LIBS spectra and chemometrics • Falsification detection ascribed to different levels of calcium concentration.

  15. Discrimination between authentic and false tax stamps from liquor bottles using laser-induced breakdown spectroscopy and chemometrics

    International Nuclear Information System (INIS)

    This work describes the preliminary application of a compact and low-cost laser-induced breakdown spectroscopy (LIBS) instrument for falsification detection of tax stamps used in alcoholic beverages. The new instrument was based on a diode-pumped passively Q-switched Nd:YLF microchip laser and a mini-spectrometer containing a Czerny–Turner polichromator coupled to a non-intensified, non-gated, and non-cooled 2048 pixel linear sensor array (200 to 850 nm spectral range). Twenty-three tax stamp samples were analyzed by firing laser pulses within two different regions of each sample: a hologram and a blank paper region. For each acquired spectrum, the emitted radiation was integrated for 3000 ms under the continuous application of laser pulses at 100 Hz (integration of 300 plasmas). Principal component analysis (PCA) or hierarchical cluster analysis (HCA) of all emission spectra from the hologram or blank paper region revealed two well-defined groups of authentic and false samples. Moreover, for the hologram data, three subgroups of false samples were found. Additionally, partial least squares discriminant analysis (PLS-DA) was successfully applied for the detection of the false tax stamps using all emission spectra from hologram or blank paper region. The discrimination between the samples was mostly ascribed to different levels of calcium concentration in the samples. - Highlights: • Compact and low-cost laser-induced breakdown spectrometer • Analysis of tax stamps used in alcoholic beverages • Detection of false tax stamps using the LIBS spectra and chemometrics • Falsification detection ascribed to different levels of calcium concentration

  16. Fluorinated ethylene-propylene: a complementary alternative to PDMS for nanoimprint stamps

    Science.gov (United States)

    Greer, Andrew I. M.; Vasiev, Iskandar; Della-Rosa, Benoit; Gadegaard, Nikolaj

    2016-04-01

    Polydimethylsiloxane (PDMS) is used by many for nanoimprint applications due to its affordability, ease of preparation, mechanical flexibility, compatibility with imprint resists and transparency to UV light. However PDMS is notoriously flexible, tacky and permeable to air. Here fluorinated ethylene-propylene (FEP) is considered as a viable and versatile alternative material for nanoimprint stamps. FEP possesses many of the desirable nanoimprint attributes associated with PDMS but crucially also features a range of complementary characteristics, including an order of magnitude more mechanical strength allowing it to handle higher loads than PDMS, an intrinsically non-stick surface and is compatible with oxygen sensitive resists. Unlike elastomeric polymers, FEP is glassy so patterning may be realised via hot embossing. Not only is this a facile and rapid means of physical structuring but it also facilitates combinatorial patterning, providing a versatility beyond that of traditional casting materials. Due to the intrinsically slow creep of FEP both micro- and nanopatterning are successfully performed sequentially. Feature sizes from 45 nm were successfully realised via the hot-embossing method. To further demonstrate the potential of the material, a modified computer numerical control machine is used. It is capable of photo-, nanoimprint- and laser lithography in conjunction with patterned FEP foils. The tool is used to perform pattern transfer into a developmental nanoimprint resist from Micro Resist Technology, mr-NIL210 XP, and Nano SU-8 3005 negative tone photo resist from MicroChem. Ultimately three-tier lithography is performed in unison and advantageous step-and-repeat performance is achieved with fabricated FEP imprint stamps as they demould more compliantly and resist pressure and contamination better than PDMS.

  17. Classical Fourier analysis

    CERN Document Server

    Grafakos, Loukas

    2014-01-01

    The main goal of this text is to present the theoretical foundation of the field of Fourier analysis on Euclidean spaces. It covers classical topics such as interpolation, Fourier series, the Fourier transform, maximal functions, singular integrals, and Littlewood–Paley theory. The primary readership is intended to be graduate students in mathematics with the prerequisite including satisfactory completion of courses in real and complex variables. The coverage of topics and exposition style are designed to leave no gaps in understanding and stimulate further study. This third edition includes new Sections 3.5, 4.4, 4.5 as well as a new chapter on “Weighted Inequalities,” which has been moved from GTM 250, 2nd Edition. Appendices I and B.9 are also new to this edition.  Countless corrections and improvements have been made to the material from the second edition. Additions and improvements include: more examples and applications, new and more relevant hints for the existing exercises, new exercises, and...

  18. The Classical Electron Problem

    CERN Document Server

    Gill, T L; Lindesay, J

    2001-01-01

    In this paper, we construct a parallel image of the conventional Maxwell theory by replacing the observer-time by the proper-time of the source. This formulation is mathematically, but not physically, equivalent to the conventional form. The change induces a new symmetry group which is distinct from, but closely related to the Lorentz group, and fixes the clock of the source for all observers. The new wave equation contains an additional term (dissipative), which arises instantaneously with acceleration. This shows that the origin of radiation reaction is not the action of a "charge" on itself but arises from inertial resistance to changes in motion. This dissipative term is equivalent to an effective mass so that classical radiation has both a massless and a massive part. Hence, at the local level the theory is one of particles and fields but there is no self-energy divergence (nor any of the other problems). We also show that, for any closed system of particles, there is a global inertial frame and unique (...

  19. Time, classical and quantum

    Science.gov (United States)

    Aniello, P.; Ciaglia, F. M.; Di Cosmo, F.; Marmo, G.; Pérez-Pardo, J. M.

    2016-10-01

    We propose a new point of view regarding the problem of time in quantum mechanics, based on the idea of replacing the usual time operator T with a suitable real-valued function T on the space of physical states. The proper characterization of the function T relies on a particular relation with the dynamical evolution of the system rather than with the infinitesimal generator of the dynamics (Hamiltonian). We first consider the case of classical hamiltonian mechanics, where observables are functions on phase space and the tools of differential geometry can be applied. The idea is then extended to the case of the unitary evolution of pure states of finite-level quantum systems by means of the geometric formulation of quantum mechanics. It is found that T is a function on the space of pure states which is not associated with any self-adjoint operator. The link between T and the dynamical evolution is interpreted as defining a simultaneity relation for the states of the system with respect to the dynamical evolution itself. It turns out that different dynamical evolutions lead to different notions of simultaneity, i.e., the notion of simultaneity is a dynamical notion.

  20. Classics in radio astronomy

    CERN Document Server

    Sullivan, Woodruff Turner

    1982-01-01

    Radio techniques were the nrst to lead astronomy away from the quiescent and limited Universe revealed by traditional observations at optical wave­ lengths. In the earliest days of radio astronomy, a handful of radio physicists and engineers made one startling discovery after another as they opened up the radio sky. With this collection of classic papers and the extensive intro­ ductory material, the reader can experience these exciting discoveries, as well as understand the developing techniques and follow the motivations which prompted the various lines of inquiry. For instance he or she will follow in detail the several attempts to detect radio waves from the sun at the turn of the century; the unravelling by Jansky of a "steady hiss type static"; the incredible story of Reber who built a 9 meter dish in his backyard in 1937 and then mapped the Milky Way; the vital discoveries by Hey and colleagues of radio bursts from the Sun and of a discrete source in the constellation of Cygnus; the development of re...

  1. Extended symmetrical classical electrodynamics.

    Science.gov (United States)

    Fedorov, A V; Kalashnikov, E G

    2008-03-01

    In this paper, we discuss a modification of classical electrodynamics in which "ordinary" point charges are absent. The modified equations contain additional terms describing the induced charges and currents. The densities of the induced charges and currents depend on the vector k and the vectors of the electromagnetic field, E and B . It is shown that the vectors E and B can be defined in terms of two four-potentials and the components of k are the components of a four-tensor of the third rank. The Lagrangian of the modified electrodynamics is defined. The conditions are derived at which only one four-potential determines the behavior of the electromagnetic field. It is also shown that static modified electrodynamics can describe the electromagnetic field in the inner region of an electric monopole. In the outer region of the electric monopole the electric field is governed by the Maxwell equations. It follows from boundary conditions at the interface between the inner and outer regions of the monopole that the vector k has a discrete spectrum. The electric and magnetic fields, energy, and angular momentum of the monopole are found for different eigenvalues of k .

  2. Classical competing risks

    CERN Document Server

    Crowder, Martin J

    2001-01-01

    If something can fail, it can often fail in one of several ways and sometimes in more than one way at a time. There is always some cause of failure, and almost always, more than one possible cause. In one sense, then, survival analysis is a lost cause. The methods of Competing Risks have often been neglected in the survival analysis literature. Written by a leading statistician, Classical Competing Risks thoroughly examines the probability framework and statistical analysis of data of Competing Risks. The author explores both the theory of the subject and the practicalities of fitting the models to data. In a coherent, self-contained, and sequential account, the treatment moves from the bare bones of the Competing Risks setup and the associated likelihood functions through survival analysis using hazard functions. It examines discrete failure times and the difficulties of identifiability, and concludes with an introduction to the counting-process approach and the associated martingale theory.With a dearth of ...

  3. Classical and quantum effective theories

    CERN Document Server

    Polonyi, Janos

    2014-01-01

    A generalization of the action principle of classical mechanics, motivated by the Closed Time Path (CTP) scheme of quantum field theory, is presented to deal with initial condition problems and dissipative forces. The similarities of the classical and the quantum cases are underlined. In particular, effective interactions which describe classical dissipative forces represent the system-environment entanglement. The relation between the traditional effective theories and their CTP extension is briefly discussed and few qualitative examples are mentioned.

  4. Population in the classic economics

    OpenAIRE

    Adnan Doğruyol

    2013-01-01

    Growth subject in economics is an important factor of development. Classic economics ecole indicates the population as main variable which tender of growth. On the other hand T. R. Malthus is known as economist who regards population as a problem and brings up it among the classical economists. However, Adam Smith is an intellectual who discussed population problem earlier on the classic economics theory. According to Adam Smith one of the main factors that realise the growth is labour. In ad...

  5. The classic: Bone morphogenetic protein.

    Science.gov (United States)

    Urist, Marshall R; Strates, Basil S

    2009-12-01

    This Classic Article is a reprint of the original work by Marshall R. Urist and Basil S. Strates, Bone Morphogenetic Protein. An accompanying biographical sketch of Marshall R. Urist, MD is available at DOI 10.1007/s11999-009-1067-4; a second Classic Article is available at DOI 10.1007/s11999-009-1069-2; and a third Classic Article is available at DOI 10.1007/s11999-009-1070-9. The Classic Article is copyright 1971 by Sage Publications Inc. Journals and is reprinted with permission from Urist MR, Strates BS. Bone morphogenetic protein. J Dent Res. 1971;50:1392-1406.

  6. The classic: Bone morphogenetic protein.

    Science.gov (United States)

    Urist, Marshall R; Strates, Basil S

    2009-12-01

    This Classic Article is a reprint of the original work by Marshall R. Urist and Basil S. Strates, Bone Morphogenetic Protein. An accompanying biographical sketch of Marshall R. Urist, MD is available at DOI 10.1007/s11999-009-1067-4; a second Classic Article is available at DOI 10.1007/s11999-009-1069-2; and a third Classic Article is available at DOI 10.1007/s11999-009-1070-9. The Classic Article is copyright 1971 by Sage Publications Inc. Journals and is reprinted with permission from Urist MR, Strates BS. Bone morphogenetic protein. J Dent Res. 1971;50:1392-1406. PMID:19727989

  7. A Classic Beauty

    Science.gov (United States)

    2007-01-01

    M51, whose name comes from being the 51st entry in Charles Messier's catalog, is considered to be one of the classic examples of a spiral galaxy. At a distance of about 30 million light-years from Earth, it is also one of the brightest spirals in the night sky. A composite image of M51, also known as the Whirlpool Galaxy, shows the majesty of its structure in a dramatic new way through several of NASA's orbiting observatories. X-ray data from NASA's Chandra X-ray Observatory reveals point-like sources (purple) that are black holes and neutron stars in binary star systems. Chandra also detects a diffuse glow of hot gas that permeates the space between the stars. Optical data from the Hubble Space Telescope (green) and infrared emission from the Spitzer Space Telescope (red) both highlight long lanes in the spiral arms that consist of stars and gas laced with dust. A view of M51 with the Galaxy Evolution Explorer telescope shows hot, young stars that produce lots of ultraviolet energy (blue). The textbook spiral structure is thought be the result of an interaction M51 is experiencing with its close galactic neighbor, NGC 5195, which is seen just above. Some simulations suggest M51's sharp spiral shape was partially caused when NGC 5195 passed through its main disk about 500 million years ago. This gravitational tug of war may also have triggered an increased level of star formation in M51. The companion galaxy's pull would be inducing extra starbirth by compressing gas, jump-starting the process by which stars form.

  8. Innovation: the classic traps.

    Science.gov (United States)

    Kanter, Rosabeth Moss

    2006-11-01

    Never a fad, but always in or out of fashion, innovation gets rediscovered as a growth enabler every half dozen years. Too often, though, grand declarations about innovation are followed by mediocre execution that produces anemic results, and innovation groups are quietly disbanded in cost-cutting drives. Each managerial generation embarks on the same enthusiastic quest for the next new thing. And each generation faces the same vexing challenges- most of which stem from the tensions between protecting existing revenue streams critical to current success and supporting new concepts that may be crucial to future success. In this article, Harvard Business School professor Rosabeth Moss Kanter reflects on the four major waves of innovation enthusiasm she's observed over the past 25 years. She describes the classic mistakes companies make in innovation strategy, process, structure, and skills assessment, illustrating her points with a plethora of real-world examples--including AT&T Worldnet, Timberland, and Ocean Spray. A typical strategic blunder is when managers set their hurdles too high or limit the scope of their innovation efforts. Quaker Oats, for instance, was so busy in the 1990s making minor tweaks to its product formulas that it missed larger opportunities in distribution. A common process mistake is when managers strangle innovation efforts with the same rigid planning, budgeting, and reviewing approaches they use in their existing businesses--thereby discouraging people from adapting as circumstances warrant. Companies must be careful how they structure fledgling entities alongside existing ones, Kanter says, to avoid a clash of cultures and agendas--which Arrow Electronics experienced in its attempts to create an online venture. Finally, companies commonly undervalue and underinvest in the human side of innovation--for instance, promoting individuals out of innovation teams long before their efforts can pay off. Kanter offers practical advice for avoiding

  9. Classical swine fever in pigs: recent developments and future perspectives.

    Science.gov (United States)

    Chander, Vishal; Nandi, S; Ravishankar, C; Upmanyu, V; Verma, Rishendra

    2014-06-01

    Classical swine fever (CSF) is one of the most devastating epizootic diseases of pigs, causing high morbidity and mortality worldwide. The diversity of clinical signs and similarity in disease manifestations to other diseases make CSF difficult to diagnose with certainty. The disease is further complicated by the presence of a number of different strains belonging to three phylogenetic groups. Advanced diagnostic techniques allow detection of antigens or antibodies in clinical samples, leading to implementation of proper and effective control programs. Polymerase chain reaction (PCR)-based methods, including portable real-time PCR, provide diagnosis in a few hours with precision and accuracy, even at the point of care. The disease is controlled by following a stamping out policy in countries where vaccination is not practiced, whereas immunization with live attenuated vaccines containing the 'C' strain is effectively used to control the disease in endemic countries. To overcome the problem of differentiation of infected from vaccinated animals, different types of marker vaccines, with variable degrees of efficacy, along with companion diagnostic assays have been developed and may be useful in controlling and even eradicating the disease in the foreseeable future. The present review aims to provide an overview and status of CSF as a whole with special reference to swine husbandry in India.

  10. Classic writings on instructional technology

    NARCIS (Netherlands)

    Ely, Donald P.; Plomp, Tjeerd

    1996-01-01

    This paper describes the selection process of 17 articles for inclusion in the book, "Classic Writings on Instructional Technology." The book brings together original "classic" educational technology articles into one volume to document the history of the field through its literature. It is also an

  11. Dynamical Symmetries in Classical Mechanics

    Science.gov (United States)

    Boozer, A. D.

    2012-01-01

    We show how symmetries of a classical dynamical system can be described in terms of operators that act on the state space for the system. We illustrate our results by considering a number of possible symmetries that a classical dynamical system might have, and for each symmetry we give examples of dynamical systems that do and do not possess that…

  12. Teaching and Demonstrating Classical Conditioning.

    Science.gov (United States)

    Sparrow, John; Fernald, Peter

    1989-01-01

    Discusses classroom demonstrations of classical conditioning and notes tendencies to misrepresent Pavlov's procedures. Describes the design and construction of the conditioner that is used for demonstrating classical conditioning. Relates how students experience conditioning, generalization, extinction, discrimination, and spontaneous recovery.…

  13. Classical Music Fan Chen Li

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    The heyday of Beijing’s classical music beganin 1993, when top-quality sound equipment andrecords were imported. Also in that year, BeijingMusic Radio presented a classical music programtitled "Fan’s Club" and founded the "Music and

  14. Classic African American Children's Literature

    Science.gov (United States)

    McNair, Jonda C.

    2010-01-01

    The purpose of this article is to assert that there are classic African American children's books and to identify a sampling of them. The author presents multiple definitions of the term classic based on the responses of children's literature experts and relevant scholarship. Next, the manner in which data were collected and analyzed in regard to…

  15. Classical dynamics a modern perspective

    CERN Document Server

    Sudarshan, Ennackal Chandy George

    2016-01-01

    Classical dynamics is traditionally treated as an early stage in the development of physics, a stage that has long been superseded by more ambitious theories. Here, in this book, classical dynamics is treated as a subject on its own as well as a research frontier. Incorporating insights gained over the past several decades, the essential principles of classical dynamics are presented, while demonstrating that a number of key results originally considered only in the context of quantum theory and particle physics, have their foundations in classical dynamics.Graduate students in physics and practicing physicists will welcome the present approach to classical dynamics that encompasses systems of particles, free and interacting fields, and coupled systems. Lie groups and Lie algebras are incorporated at a basic level and are used in describing space-time symmetry groups. There is an extensive discussion on constrained systems, Dirac brackets and their geometrical interpretation. The Lie-algebraic description of ...

  16. Can Food Stamps Do More to Improve Food Choices? An Economic Perspective--Higher Cost of Food in Some Areas May Affect Food Stamp Households' Ability To Make Healthy Food Choices

    OpenAIRE

    Nord, Mark; Hopwood, Heather

    2007-01-01

    The cost of “enough food,” estimated from the amount that low- and medium-income households in a geographic area report needing to spend to just meet their food needs, differs substantially across States and among metropolitan areas. In areas with high food costs, many food-stamp recipients are likely to have inadequate food resources to support healthy food choices.

  17. Neuropathology in classical and variant ataxia-telangiectasia

    NARCIS (Netherlands)

    Verhagen, Mijke M. M.; Martin, Jean-Jacques; van Deuren, Marcel; Groote, Chantal Ceuterick-de; Weemaes, Corry M. R.; Kremer, Berry H. P. H.; Taylor, Malcolm A. R.; Willemsen, Michel A. A. P.; Lammens, Martin

    2012-01-01

    Ataxia-telangiectasia (A-T) is classically characterized by progressive neurodegeneration, oculocutaneous telangiectasia, immunodeficiency and elevated a-fetoprotein levels. Some patients, classified as variant A-T, exhibit a milder clinical course. In the latter patients extrapyramidal symptoms, in

  18. 冲压设备的管理与预防性维修实践%Management of stamping equipment and practice of preventive maintenance

    Institute of Scientific and Technical Information of China (English)

    查小福

    2016-01-01

    文章从基础管理和技术管理两个层面介绍了冲压设备的管理模式,并结合维践,冲压设备的预防性维修进行了探讨。%This artice from the basic management and technology management two aspects of the stamping equipment management model, and combined with the maintenance practice, the stamping equipment preventive maintenance is discussed.

  19. A Reseach on Measures to Extend the Service Life of Stamping Dies%提高冲压模具使用寿命的措施

    Institute of Scientific and Technical Information of China (English)

    李恒菊

    2015-01-01

    This paper mainly analyzed the causes shortening the service life of stamping dies,investigated the measures to im-prove the service life of stamping dies.%文章主要分析了造成冲压模具寿命降低的原因,探讨了对于提高冲压模具使用寿命的措施。

  20. The reduction of irregularities in the use of “process fmea”: a study for a cold stamping process

    OpenAIRE

    Carla Estorilio; Richard Posso

    2011-01-01

    The Failure Mode and Effect Analysis (FMEA) is a requirement for ISO/TS 16949. However, researches show nonconformities in its use by automotive suppliers. The objective of this study is to identify these nonconformities, aiming to suggest methods for minimizing this problem. Therefore, questionnaires were applied in seven automotive suppliers and, for each one, ten FMEA`s were analysed. The research identified nonconformities in the use of FMEA for the stamping process and highlighted seven ...

  1. Monolithically integrated, flexible display of polymer-dispersed liquid crystal driven by rubber-stamped organic thin-film transistors

    International Nuclear Information System (INIS)

    This letter describes the monolithic integration of rubber-stamped thin-film organic transistors with polymer-dispersed liquid crystals (PDLCs) to create a multipixel, flexible display with plastic substrates. We report the electro-optic switching behavior of the PDLCs as driven by the organic transistors, and we show that our displays operate robustly under flexing and have a contrast comparable to that of newsprint. [copyright] 2001 American Institute of Physics

  2. Functional elements and engineering template-based product development process. Application for the support of stamping tool design

    OpenAIRE

    Prieur, Michael

    2006-01-01

    This thesis proposes a product design solution based on functional elements and particularly on one of its sub-categories called engineering templates. The approach supports the development process to reach the common goals of time reduction and quality enhancement by shortening the product development times, enabling continuous information flows and capitalizing on engineering knowledge. An example based on the template of a stamping tool illustrates the influence of templates on process cha...

  3. Development of low-friction and wear-resistant surfaces for low-cost Al hot stamping tools

    OpenAIRE

    Dong Y; Formosa D.; Fernandez J.; Li X; Fuentes G.; Zoltan K.; Dong H.

    2015-01-01

    In this study, advanced surfaces and coatings have been developed using plasma thermochemical treatment, PVD coating, electroless Ni-BN plating and duplex surface engineering to produce low-friction and wear-resistant surfaces for cast iron stamping tools. Their microstructural and nano-mechanical properties were systematically analysed and the tribological behaviour of these new surfaces and coatings were evaluated. The experimental results have shown that under dry sliding condition, the tr...

  4. Effect Analysis of Geometric Parameters on Stainless Steel Stamping Multistage Pump by Experimental Test and Numerical Calculation

    OpenAIRE

    Chuan Wang; Weidong Shi; Ling Zhou; Weigang Lu

    2013-01-01

    In order to improve the efficiency of stainless steel stamping multistage pump, quadratic regression orthogonal test, hydraulic design, and computational fluid dynamics (CFD) are used to analyze the effect of pump geometric parameters. Sixteen impellers are designed based on the quadratic regression orthogonal test, which have three factors including impeller outlet slope, impeller blade outlet stagger angle, and impeller blade outlet width. Through quadratic regression equation, the function...

  5. Quantum localization of classical mechanics

    Science.gov (United States)

    Batalin, Igor A.; Lavrov, Peter M.

    2016-07-01

    Quantum localization of classical mechanics within the BRST-BFV and BV (or field-antifield) quantization methods are studied. It is shown that a special choice of gauge fixing functions (or BRST-BFV charge) together with the unitary limit leads to Hamiltonian localization in the path integral of the BRST-BFV formalism. In turn, we find that a special choice of gauge fixing functions being proportional to extremals of an initial non-degenerate classical action together with a very special solution of the classical master equation result in Lagrangian localization in the partition function of the BV formalism.

  6. Discrimination between authentic and false tax stamps from liquor bottles using laser-induced breakdown spectroscopy and chemometrics

    Science.gov (United States)

    Gonzaga, Fabiano Barbieri; Rocha, Werickson Fortunato de Carvalho; Correa, Deleon Nascimento

    2015-07-01

    This work describes the preliminary application of a compact and low-cost laser-induced breakdown spectroscopy (LIBS) instrument for falsification detection of tax stamps used in alcoholic beverages. The new instrument was based on a diode-pumped passively Q-switched Nd:YLF microchip laser and a mini-spectrometer containing a Czerny-Turner polichromator coupled to a non-intensified, non-gated, and non-cooled 2048 pixel linear sensor array (200 to 850 nm spectral range). Twenty-three tax stamp samples were analyzed by firing laser pulses within two different regions of each sample: a hologram and a blank paper region. For each acquired spectrum, the emitted radiation was integrated for 3000 ms under the continuous application of laser pulses at 100 Hz (integration of 300 plasmas). Principal component analysis (PCA) or hierarchical cluster analysis (HCA) of all emission spectra from the hologram or blank paper region revealed two well-defined groups of authentic and false samples. Moreover, for the hologram data, three subgroups of false samples were found. Additionally, partial least squares discriminant analysis (PLS-DA) was successfully applied for the detection of the false tax stamps using all emission spectra from hologram or blank paper region. The discrimination between the samples was mostly ascribed to different levels of calcium concentration in the samples.

  7. Study on the resistance spot welding technology of 22MnMoB hot stamping quenched steel

    Institute of Scientific and Technical Information of China (English)

    Feng Yi; Ma Mingtu; Hua Fuan; Zhang Junping; Song Leifeng; Jin Qingsheng

    2014-01-01

    In this paper,the spot welding technology of a new kind of 22MnMoB hot stamping quenched steel sheet was systematically studied by power frequency spot welder. Through a series of technology and test exper-iments,we have obtained the optimal spot welding technological parameter condition. According to the results, the relations among spot welding technological parameter,welding nugget,mechanical property and fracture mode were discussed. The effects of all the welding parameters such as welding current,welding time and elec-trode force on the quality of joint can be boiled down to one thing-the diameter of welding nugget. The experi-mental results showed that welding nugget diameter determines the mechanical property of spot welding joint and the relation between welding nugget diameter and the mechanical property of joint presents a kind of linear mathematic representation. There are two typical fracture models of 22MnMoB hot stamping quenched steel sheet,i.e.,interfacial fracture and nugget pullout. Other than mild steel or normal high strength steel,in the shearing tensile test,hot stamping quenched steel has a great tendency to fail in interfacial mode due to the ef-fects of high strength matrix structure,welding soft zone and the porosity level of fusion zone.

  8. Sensitivity Analysis of Effect Related with Material Process and Assembly Variations to Loads Deformation and Stress on HSS Stamping Die

    Institute of Scientific and Technical Information of China (English)

    ZHANG Gui-bao; CHEN Jun; WANG Amber

    2008-01-01

    During stamping process,the material properties,process design parameters and production environments inevitably have variation and noisy factors,which possibly affect the sheet metal forInability and the deformation of the die structure.After gaining a success in applying sheet metal forming numerical simulation analysis to get the forming loads during stamping process,a methodology of die structure analysis based on sheet metal forming simulation was proposed and validated by experiments.Based on these results,the effect related with initial blank thickness,blank holder force,blank positioning error and die alignment error variations to a DP600 hyperbolic bottomed cup drawing die's forming loads (especially unbalanced loads),and deformation and stress was studied numerically.The influence level of these variations to the die's forming loads,deformation and stress was disclosed.The findings can guide die design,die tryout and process control for high-strength steel (HSS) stamping with increased forming load and decreased sheet metal formability.

  9. Classical Cepheid pulsation models --- VI. The Hertzsprung progression

    Science.gov (United States)

    Bono, G.; Marconi, M.; Stellingwerf, R. F.

    2000-08-01

    We present the results of an extensive theoretical investigation on the pulsation behavior of Bump Cepheids. We constructed several sequences of full amplitude, nonlinear, convective models by adopting a chemical composition typical of Large Magellanic Cloud (LMC) Cepheids (Y=0.25, Z=0.008) and stellar masses ranging from M/M⊙ =6.55 to 7.45. We find that theoretical light and velocity curves reproduce the HP, and indeed close to the blue edge the bump is located along the descending branch, toward longer periods it crosses at first the luminosity/velocity maximum and then it appears along the rising branch. In particular, we find that the predicted period at the HP center is PHP = 11.24∓0.46 d and that such a value is in very good agreement with the empirical value estimated by adopting the Fourier parameters of LMC Cepheid light curves i.e. PHP = 11.2 ∓ 0.8 d (Welch et al. 1997). Moreover, light and velocity amplitudes present a "double-peaked" distribution which is in good qualitative agreement with observational evidence on Bump Cepheids. It turns out that both the skewness and the acuteness typically show a well-defined minimum at the HP center and the periods range from PHP = 10.73 ∓ 0.97 d to PHP = 11.29 ∓ 0.53 d which are in good agreement with empirical estimates. We also find that the models at the HP center are located within the resonance region but not on the 2:1 resonance line (P2/P0 = 0.5), and indeed the P2/P0 ratios roughly range from 0.51 (cool models) to 0.52 (hot models). Interestingly enough, the predicted Bump Cepheid masses, based on a Mass-Luminosity (ML) relation which neglects the convective core overshooting, are in good agreement with the empirical masses of Galactic Cepheids estimated by adopting the Baade-Wesselink method (Gieren 1989). As a matter of fact, the observed mass at the HP center -P ≍ 11.2 d- is 6.9 ∓ 0.9 M⊙, while the predicted mass is 7.0 ∓ 0.45 M⊙. Even by accounting for the metallicity difference between Galactic and LMC Cepheids, this result seems to settle down the long-standing problem of the Bump mass discrepancy. Finally, the dynamical behavior of a cool Bump Cepheid model provides a plain explanation of an ill- understood empirical evidence. In fact, it turns out that toward cooler effective temperatures the bump becomes the main maximum, while the true maximum is the bump which appears along the rising branch. This finding also supplies a plain explanation of the reason why the pulsation amplitudes of Bump Cepheids present a "double-peaked" distribution.

  10. Stamping transfer of a quantum dot interlayer for organic photovoltaic cells.

    Science.gov (United States)

    Jeon, Ji Hye; Wang, Dong Hwan; Park, Hyunmin; Park, Jong Hyeok; Park, O Ok

    2012-06-26

    An organophilic cadmium selenide (CdSe) quantum dot (QD) interlayer was prepared on the active layer in organic solar cells by a stamping transfer method. The mother substrate composed of a UV-cured film on a polycarbonate film with strong solvent resistance makes it possible to spin-coat QDs on it and dry transfer onto an active layer without damaging the active layer. The QD interlayers have been optimized by controlling the concentration of the QD solution. The coverage of QD particles on the active layer was verified by TEM analysis and fluorescence images. After insertion of the QD interlayer between the active layer and metal cathode, the photovoltaic performances of the organic solar cell were clearly enhanced. By ultraviolet photoelectron spectroscopy of CdSe QDs, it can be anticipated that the CdSe QD interlayer reduces charge recombination by blocking the holes moving to the cathode from the active layer and facilitating efficient collection of the electrons from the active layer to the cathode.

  11. Optimization of Process Parameters of Stamping Forming of the Automotive Lower Floor Board

    Directory of Open Access Journals (Sweden)

    Guoying Ma

    2014-01-01

    Full Text Available There are many process parameters which have great effect on the forming quality of parts during automobile panel stamping forming process. This paper took automotive lower floor board as the research object; the forming process was analyzed by finite element simulation using Dynaform. The influences of four main process parameters including BHF (blank holder force, die corner radius, friction coefficient, and die clearance on the maximum thinning rate and the maximum thickening rate were researched based on orthogonal experiment. The results show that the influences of each value of various factors on the target are not identical. On this basis, the optimization of the four parameters was carried out, and the high quality product was obtained and the maximum thinning rate and maximum thickening rate were effectively controlled. The results also show that the simulation analysis provides the basis for the optimization of the forming process parameters, and it can greatly shorten the die manufacturing cycles, reduce the production costs, and improve the production efficiency.

  12. Comparative analysis by simulating and testing pole impact for hot stamping front crossbeam of automobile

    Institute of Scientific and Technical Information of China (English)

    Ma Fangwu; Yao Zaiqi; Liu Qiang; Wang Xiaona; Zhao Fuquan; Li Fangfang; Lin Jianping

    2012-01-01

    Hot stamping 22MnB5 steel plate with ultra-high strength has been widely used for body structural members in consideration of automobile safety and lightweight. This paper presents a verification program of simulating and testing pole impact in order to verify if the front crossbeam reinforcement assembly can meet the design requirements, reduce the overall vehicle simulation and test cost and shorten the operation period. In the same condition, the simulation proved conforming to the design requirements; however, the bumper cracked at the impacting point in the course of pole impact test. The analysis of the crack by optical microscope, Vickers and scanning electron microscope indicates that mixture of ferrite, bainite and martensite was produced in the weld heat-affected zone of the 340/590DP tow hook holder and the 22MnB5 front crossbeam; therefore, their hardness and mechanical property were reduced obviously, so that they fractured when impacted. No welding process with continuous weld but spot welding or other bonding method may be employed for the reason that the capacity of the 22MnB5 steel plate in the weld heat-affected zone was reduced obvi- ously.

  13. Development of novel proton exchange membrane fuel cells using stamped metallic bipolar plates

    Science.gov (United States)

    Jung, Shiauh-Ping; Lee, Chun-I.; Chen, Chi-Chang; Chang, Wen-Sheng; Yang, Chang-Chung

    2015-06-01

    This study presents the development of novel proton exchange membrane fuel cells using stamped metallic bipolar plates. To achieve uniformly distributed and low pressure-drop flow fields within fuel cells, a novel bipolar plate with straight channels is designed and verification of a fuel-cell short stack using this bipolar plate is performed. In the experiments, low-temperature and low-humidity operations and high-temperature and high-humidity operations are adopted to evaluate effects of stack temperature and inlet relative humidity on performance at various outlet pressures. Experimental results show that under low-temperature and low-humidity operations, increasing the outlet pressure enhances stack performance and reduces performance differences between various stack temperatures. Under high-temperature and high-humidity operations, stack performance increases with increasing outlet pressures, while the extent of their increase becomes smaller. Compared to low-temperature and low-humidity operations, high-temperature and high-humidity operations have better electrochemical reactions and membrane hydration and, thus, better stack performance. In this study, the operation with a stack temperature of 80 °C and outlet pressure of 4 atm produces the best performance of 1100 mA cm-2 at 0.646 V.

  14. Hot stamping of AA6082 tailor welded blanks: experiment and FE simulation

    Directory of Open Access Journals (Sweden)

    Liu Jun

    2016-01-01

    Full Text Available An advanced forming technology, solution Heat treatment, Forming and in-die Quenching (HFQ®, has been employed to form AA6082 tailor welded blanks (TWBs. In comparison with conventional stamping of TWBs, the mechanical properties and formability of AA6082 laser TWBs could be improved under the HFQ® forming condition. The TWB was divided into three physical zones, i.e. base metal, heat affected zone (HAZ and weld zone, based on the hardness distribution. It was found that the degraded hardness of the weldment can be restored after HFQ® forming. TWBs of AA6082 with different thickness ratios of 2 (2–1 mm, 1.3 (2–1.5 mm and 1 (1.5–1.5 mm were used to study the TWB thickness ratio effects on the forming behaviour. Hemispherical punch dome tests on the TWBs with varying thickness ratios demonstrated different formabilities, and indicated increased displacement of the weld line with increasing thickness ratio. Finite element (FE modelling was adopted to analyse the weld line movement and strain distributions during HFQ® forming.

  15. Postage stamp-sized array sensor for the sensitive screening test of heavy-metal ions.

    Science.gov (United States)

    Zhang, Yu; Li, Xiao; Li, Hui; Song, Ming; Feng, Liang; Guan, Yafeng

    2014-10-01

    The sensitive determination of heavy-metal ions has been widely investigated in recent years due to their threat to the environment and to human health. Among various analytical detection techniques, inexpensive colorimetric testing papers/strips play a very important role. The limitation, however, is also clear: the sensitivity is usually low and the selectivity is poor. In this work, we have developed a postage stamp-sized array sensor composed of nine commercially available heterocyclic azo indicators. Combining filtration-based enrichment with an array of technologies-based pattern-recognition, we have obtained the discrimination capability for seven heavy-metal ions (Hg(2+), Pb(2+), Ag(+), Ni(2+), Cu(2+), Zn(2+), and Co(2+)) at their Chinese wastewater discharge standard concentrations. The allowable detection level of Hg(2+) was down to 0.05 mg L(-1). The heavy-metal ions screening test was readily achieved using a standard chemometric approach. And the array sensor applied well in real water samples. PMID:25068762

  16. Measurement, time-stamping, and analysis of electrodermal activity in fMRI

    Science.gov (United States)

    Smyser, Christopher; Grabowski, Thomas J.; Rainville, Pierre; Bechara, Antione; Razavi, Mehrdad; Mehta, Sonya; Eaton, Brent L.; Bolinger, Lizann

    2002-04-01

    A low cost fMRI-compatible system was developed for detecting electrodermal activity without inducing image artifact. Subject electrodermal activity was measured on the plantar surface of the foot using a standard recording circuit. Filtered analog skin conductance responses (SCR) were recorded with a general purpose, time-stamping data acquisition system. A conditioning paradigm involving painful thermal stimulation was used to demonstrate SCR detection and investigate neural correlates of conditioned autonomic activity. 128x128 pixel EPI-BOLD images were acquired with a GE 1.5T Signa scanner. Image analysis was performed using voxel-wise multiple linear regression. The covariate of interest was generated by convolving stimulus event onset with a standard hemodynamic response function. The function was time-shifted to determine optimal activation. Significance was tested using the t-statistic. Image quality was unaffected by the device, and conditioned and unconditioned SCRs were successfully detected. Conditioned SCRs correlated significantly with activity in the right anterior insular cortex. The effect was more robust when responses were scaled by SCR amplitude. The ability to measure and time register SCRs during fMRI acquisition enables studies of cognitive processes marked by autonomic activity, including those involving decision-making, pain, emotion, and addiction.

  17. The Choices programme: a simple, front-of-pack stamp making healthy choices easy.

    Science.gov (United States)

    Dötsch-Klerk, Mariska; Jansen, Léon

    2008-01-01

    Some food products fit better within a healthy diet than others, but how can consumers tell? The Choices programme is a simple and internationally-applicable programme to help consumers make a healthy choice on food and beverages and to stimulate industry towards healthy product innovation in all food groups. The essence of the programme is a front-of-pack stamp on products that pass an evaluation against scientific criteria. To that end generic criteria have been established for levels of saturated fat, trans fat, sugars and sodium, which are based on international dietary guidelines (FAO/WHO). For some food categories there are specific criteria for these nutrients as well as for dietary fibre and calories. In this way the criteria are challenging without being impossible to meet. The programme has been initiated by food industry and is open to all companies in food industry, retail and catering. The approach is also supported by nutritional scientists, governments and NGOs. An independent scientific committee is responsible for designing and periodically reviewing the qualifying criteria. The current qualifying criteria were developed by scientific committees in the Netherlands and Belgium. These criteria will now be reviewed by an International Scientific Committee, consisting of internationally-recognised food and nutrition experts. To accommodate the developments in nutrition science and food technology, this review will take place every two years. PMID:18296385

  18. From Classical to Quantum Transistor

    Directory of Open Access Journals (Sweden)

    Sanjeev Kumar

    2009-05-01

    Full Text Available In this article the classical transistor and the basic physics underlying the operation of single electron transistor are presented; a brief history of transistor and current technological issues are discussed.

  19. Classical Mechanics and Symplectic Integration

    DEFF Research Database (Denmark)

    Nordkvist, Nikolaj; Hjorth, Poul G.

    2005-01-01

    Content: Classical mechanics: Calculus of variations, Lagrange’s equations, Symmetries and Noether’s theorem, Hamilton’s equations, cannonical transformations, integrable systems, pertubation theory. Symplectic integration: Numerical integrators, symplectic integrators, main theorem on symplectic...

  20. Fano interference in classical oscillators

    International Nuclear Information System (INIS)

    We seek to illustrate Fano interference in a classical coupled oscillator by using classical analogues of the atom-laser interaction. We present an analogy between the dressed state picture of coherent atom-laser interaction and a classical coupled oscillator. The Autler-Townes splitting due to the atom-laser interaction is analogous to the splitting of normal-mode frequencies of a coupled oscillator. Using this analogy, we simulate and experimentally demonstrate Fano interference and the associated phenomena in three-level atoms in a coupled electrical resonator circuit. This work aims to highlight analogies between classical and quantum systems for students at the postgraduate and graduate levels. Also, the reported technique can be easily realized in undergraduate laboratories. (paper)

  1. New perspectives on classical electromagnetism

    OpenAIRE

    Cote, Paul J.

    2009-01-01

    The fallacies associated with the gauge concept in electromagnetism are illustrated. A clearer and more valid formulation of the basics of classical electromagnetism is provided by recognizing existing physical constraints as well as the physical reality of the vector potential.

  2. Elementary charges in classical electrodynamics

    OpenAIRE

    KAPU'{S}CIK, Edward

    1999-01-01

    In the framework of classical electrodynamics elementary particles are treated as capacitors. The electrostatic potentials satisfy equations of the Schrödinger type. An interesting "quantization condition" for elementary charges is derived.

  3. Probabilities for classically forbidden transitions using classical and classical path methods

    International Nuclear Information System (INIS)

    Limits are established for the applicability of purely classical methods for calculating nonreactive, inelastic transition probabilities in collinear collisions of a structureless atom and a harmonic oscillator. These limits, obtained by comparison with previous exact quantum mechanical results, indicate that such methods are inappropriate not only for ''classically forbidden'' but for many ''classically allowed'' transitions (in spite of the fact that they are widely used to calculate probabilities for such processes). A classical path method in the context of infinite-order time-dependent perturbation theory is described which yields extremely accurate transition probabilities even for the most classically forbidden transitions in the collinear atom--harmonic oscillator system. The essential features of this method are: (1) the use of the expectation value of the total interaction potential in determining the atom--oscillator (central force) trajectory, and (2) the use of the arithmetic mean of the initial and final velocities of relative motion in the (elastic) central force trajectory. This choice of interaction potential allows the relative motion to be coupled to changes in the internal state of the oscillator. The present classical method is further applied to three-dimensional atom-breathing sphere collisions, and exact quantum mechanical calculations are also carried out. Comparison of the classical path and exact quantum results shows excellent agreement both in the specific inelastic cross section and in the individual partial-wave contributions

  4. [Progressive visual agnosia].

    Science.gov (United States)

    Sugimoto, Azusa; Futamura, Akinori; Kawamura, Mitsuru

    2011-10-01

    Progressive visual agnosia was discovered in the 20th century following the discovery of classical non-progressive visual agnosia. In contrast to the classical type, which is caused by cerebral vascular disease or traumatic injury, progressive visual agnosia is a symptom of neurological degeneration. The condition of progressive visual loss, including visual agnosia, and posterior cerebral atrophy was named posterior cortical atrophy (PCA) by Benson et al. (1988). Progressive visual agnosia is also observed in semantic dementia (SD) and other degenerative diseases, but there is a difference in the subtype of visual agnosia associated with these diseases. Lissauer (1890) classified visual agnosia into apperceptive and associative types, and it in most cases, PCA is associated with the apperceptive type. However, SD patients exhibit symptoms of associative visual agnosia before changing to those of semantic memory disorder. Insights into progressive visual agnosia have helped us understand the visual system and discover how we "perceive" the outer world neuronally, with regard to consciousness. Although PCA is a type of atypical dementia, its diagnosis is important to enable patients to live better lives with appropriate functional support.

  5. Classical Transitions for Flux Vacua

    CERN Document Server

    Deskins, J Tate; Yang, I-Sheng

    2012-01-01

    We present the simplest model for classical transitions in flux vacua. A complex field with a spontaneously broken U(1) symmetry is embedded in $M_2\\times S_1$. We numerically construct different winding number vacua, the vortices interpolating between them, and simulate the collisions of these vortices. We show that classical transitions are generic at large boosts, independent of whether or not vortices miss each other in the compact $S_1$.

  6. Classical theory of radiating strings

    Science.gov (United States)

    Copeland, Edmund J.; Haws, D.; Hindmarsh, M.

    1990-01-01

    The divergent part of the self force of a radiating string coupled to gravity, an antisymmetric tensor and a dilaton in four dimensions are calculated to first order in classical perturbation theory. While this divergence can be absorbed into a renormalization of the string tension, demanding that both it and the divergence in the energy momentum tensor vanish forces the string to have the couplings of compactified N = 1 D = 10 supergravity. In effect, supersymmetry cures the classical infinities.

  7. Gaussian Dynamics is Classical Dynamics

    OpenAIRE

    Habib, Salman

    2004-01-01

    A direct comparison of quantum and classical dynamical systems can be accomplished through the use of distribution functions. This is useful for both fundamental investigations such as the nature of the quantum-classical transition as well as for applications such as quantum feedback control. By affording a clear separation between kinematical and dynamical quantum effects, the Wigner distribution is particularly valuable in this regard. Here we discuss some consequences of the fact that when...

  8. Anderson localization from classical trajectories

    OpenAIRE

    Brouwer, Piet W.; Altland, Alexander

    2008-01-01

    We show that Anderson localization in quasi-one dimensional conductors with ballistic electron dynamics, such as an array of ballistic chaotic cavities connected via ballistic contacts, can be understood in terms of classical electron trajectories only. At large length scales, an exponential proliferation of trajectories of nearly identical classical action generates an abundance of interference terms, which eventually leads to a suppression of transport coefficients. We quantitatively descri...

  9. Does classical liberalism imply democracy?

    Directory of Open Access Journals (Sweden)

    David Ellerman

    2015-12-01

    Full Text Available There is a fault line running through classical liberalism as to whether or not democratic self-governance is a necessary part of a liberal social order. The democratic and non-democratic strains of classical liberalism are both present today—particularly in the United States. Many contemporary libertarians and neo-Austrian economists represent the non-democratic strain in their promotion of non-democratic sovereign city-states (start-up cities or charter cities. We will take the late James M. Buchanan as a representative of the democratic strain of classical liberalism. Since the fundamental norm of classical liberalism is consent, we must start with the intellectual history of the voluntary slavery contract, the coverture marriage contract, and the voluntary non-democratic constitution (or pactum subjectionis. Next we recover the theory of inalienable rights that descends from the Reformation doctrine of the inalienability of conscience through the Enlightenment (e.g. Spinoza and Hutcheson in the abolitionist and democratic movements. Consent-based governments divide into those based on the subjects’ alienation of power to a sovereign and those based on the citizens’ delegation of power to representatives. Inalienable rights theory rules out that alienation in favor of delegation, so the citizens remain the ultimate principals and the form of government is democratic. Thus the argument concludes in agreement with Buchanan that the classical liberal endorsement of sovereign individuals acting in the marketplace generalizes to the joint action of individuals as the principals in their own organizations.

  10. Classical approach in atomic physics

    Energy Technology Data Exchange (ETDEWEB)

    Solov' ev, E.A. [Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation)

    2011-12-15

    The application of a classical approach to various quantum problems - the secular perturbation approach to quantization of a hydrogen atom in external fields and a helium atom, the adiabatic switching method for calculation of a semiclassical spectrum of a hydrogen atom in crossed electric and magnetic fields, a spontaneous decay of excited states of a hydrogen atom, Gutzwiller's approach to Stark problem, long-lived excited states of a helium atom discovered with the help of Poincare section, inelastic transitions in slow and fast electron-atom and ion-atom collisions - is reviewed. Further, a classical representation in quantum theory is discussed. In this representation the quantum states are treated as an ensemble of classical states. This approach opens the way to an accurate description of the initial and final states in classical trajectory Monte Carlo (CTMC) method and a purely classical explanation of tunneling phenomenon. The general aspects of the structure of the semiclassical series such as renormalization group symmetry, criterion of accuracy and so on are reviewed as well. (author)

  11. Associations of Food Stamp Participation With Dietary Quality and Obesity in Children

    Science.gov (United States)

    Leung, Cindy W.; Hoffnagle, Elena E.; Jensen, Helen H.; Foerster, Susan B.; Nestle, Marion; Cheung, Lilian W.Y.; Mozaffarian, Dariush; Willett, Walter C.

    2013-01-01

    OBJECTIVE: To determine if obesity and dietary quality in low-income children differed by participation in the Supplemental Nutrition Assistance Program (SNAP), formerly the Food Stamp Program. METHODS: The study population included 5193 children aged 4 to 19 with household incomes ≤130% of the federal poverty level from the 1999–2008 NHANES. Diet was measured by using 24-hour recalls. RESULTS: Among low-income US children, 28% resided in households currently receiving SNAP benefits. After adjusting for sociodemographic differences, SNAP participation was not associated with a higher rate of childhood obesity (odds ratio = 1.11, 95% confidence interval [CI]: 0.71–1.74). Both SNAP participants and low-income nonparticipants were below national recommendations for whole grains, fruits, vegetables, fish, and potassium, while exceeding recommended limits for processed meat, sugar-sweetened beverages, saturated fat, and sodium. Zero percent of low-income children met at least 7 of 10 dietary recommendations. After multivariate adjustment, compared with nonparticipants, SNAP participants consumed 43% more sugar-sweetened beverages (95% CI: 8%–89%), 47% more high-fat dairy (95% CI: 7%, 101%), and 44% more processed meats (95% CI: 9%–91%), but 19% fewer nuts, seeds, and legumes (95% CI: –35% to 0%). In part due to these differences, intakes of calcium, iron, and folate were significantly higher among SNAP participants. Significant differences by SNAP participation were not evident in total energy, macronutrients, Healthy Eating Index 2005 scores, or Alternate Healthy Eating Index scores. CONCLUSIONS: The diets of low-income children are far from meeting national dietary recommendations. Policy changes should be considered to restructure SNAP to improve children’s health. PMID:23439902

  12. New Approaches to Classical Liberalism

    Directory of Open Access Journals (Sweden)

    Nicolas Maloberti

    2012-01-01

    Full Text Available This article focuses on the following three novel and original philosophical approaches to classical liberalism: Den Uyl and Rasmussen's perfectionist argument from meta-norms, Gaus's justificatory model, and Kukathas's conscience-based theory of authority. None of these three approaches are utilitarian or consequentialist in character. Neither do they appeal to the notion of a rational bargain as it is typical within contractarianism. Furthermore, each of these theories rejects the idea that classical liberalism should be grounded on considerations of interpersonal justice such as those that are central to the Lockean tradition. It is argued that these three theories, despite their many attractive features, fail to articulate in a convincing manner some central classical liberal concerns.

  13. Population in the classic economics

    Directory of Open Access Journals (Sweden)

    Adnan Doğruyol

    2013-02-01

    Full Text Available Growth subject in economics is an important factor of development. Classic economics ecole indicates the population as main variable which tender of growth. On the other hand T. R. Malthus is known as economist who regards population as a problem and brings up it among the classical economists. However, Adam Smith is an intellectual who discussed population problem earlier on the classic economics theory. According to Adam Smith one of the main factors that realise the growth is labour. In addition to population made it established. The aim of this study is analyzing the mental relationship between Malthus whose name has been identified with relation between population-growth and Smith who discussed this subject first time but put it off on process of theorisation.

  14. Overview of Classical Swine Fever (Hog Cholera, Classical Swine fever)

    Science.gov (United States)

    Classical swine fever is a contagious often fatal disease of pigs clinically characterized by high body temperature, lethargy, yellowish diarrhea, vomits and purple skin discoloration of ears, lower abdomen and legs. It was first described in the early 19th century in the USA. Later, a condition i...

  15. Comparing classical and quantum equilibration

    CERN Document Server

    Malabarba, Artur S L; Short, Anthony J

    2016-01-01

    By using a physically-relevant and theory independent definition of measurement-based equilibration, we show quantitatively that equilibration is easier for quantum systems than for classical systems, in the situation where the initial state of the system is completely known (pure state). This shows that quantum equilibration is a fundamental, nigh unavoidable, aspect of physical systems, while classical equilibration relies on experimental ignorance. When the state is not completely known, a mixed state, this framework also shows quantum equilibration requires weaker conditions.

  16. Classical planning and causal implicatures

    DEFF Research Database (Denmark)

    Blackburn, Patrick Rowan; Benotti, Luciana

    to generate clarification requests"; as a result we can model task-oriented dialogue as an interactive process locally structured by negotiation of the underlying task. We give several examples of Frolog-human dialog, discuss the limitations imposed by the classical planning paradigm, and indicate......In this paper we motivate and describe a dialogue manager (called Frolog) which uses classical planning to infer causal implicatures. A causal implicature is a type of Gricean relation implicature, a highly context dependent form of inference. As we shall see, causal implicatures are important...

  17. Classical analogy of Fano resonances

    International Nuclear Information System (INIS)

    We present an analogy of Fano resonances in quantum interference to classical resonances in the harmonic oscillator system. It has a manifestation as a coupled behaviour of two effective oscillators associated with propagating and evanescent waves. We illustrate this point by considering a classical system of two coupled oscillators and interfering electron waves in a quasi-one-dimensional narrow constriction with a quantum dot. Our approach provides a novel insight into Fano resonance physics and provides a helpful view in teaching Fano resonances

  18. Principal bundles the classical case

    CERN Document Server

    Sontz, Stephen Bruce

    2015-01-01

    This introductory graduate level text provides a relatively quick path to a special topic in classical differential geometry: principal bundles.  While the topic of principal bundles in differential geometry has become classic, even standard, material in the modern graduate mathematics curriculum, the unique approach taken in this text presents the material in a way that is intuitive for both students of mathematics and of physics. The goal of this book is to present important, modern geometric ideas in a form readily accessible to students and researchers in both the physics and mathematics communities, providing each with an understanding and appreciation of the language and ideas of the other.

  19. 汽车冲压车间的工艺规划设计%Process planning design of automotive stamping workshop

    Institute of Scientific and Technical Information of China (English)

    王平; 崔礼春; 熊飞

    2012-01-01

    详细论述了汽车冲压车间工艺规划的主要设计内容,包括:设计任务,输入条件,设计原则等;介绍了现代化冲压车间的主要设备组成及各自的功用,以及冲压车间各功能区的布局规划和车间各工段人员配置清单.先进合理的冲压车间工艺规划设计,应该充分体现出自动化水平的提高、生产节拍的提升、冲压件成本的降低以及冲压件品质的提高等.%The main design content of the automobile stamping process planning was discussed in detail, including design task, input conditions, design principle, etc. The main components and their functions of modern stamping workshop, each function area layout planning and personnel allocation list of stamping workshop were introduced. In advanced stamping workshop, it reflects not only the improvement of automation level, the promotion of production rhythm, but also the lower cost of stamping parts, the improved quality and so on.

  20. Laboratory scale investigation to improve the productivity of stamp charge coke oven through optimisation of bulk density of coal cake

    Energy Technology Data Exchange (ETDEWEB)

    Dash, P.S.; Krishnan, S.H.; Sharma, R.; Banerjee, P.K.; Haldar, S.K. [Tata Steel, Jamshedpur (India)

    2005-07-01

    In the recent past, it was realised that the gross coke yield was going down as a result of lower oven throughput in the stamp charged batteries of Tata Steel. The basic reason for this being the net reduction in the ash content of the coal blend used due to the incorporation of higher percentage of low ash imported coals and reduction in the ash content of captive coals through washing. The coals having higher ash content improves the bulk density, as the specific gravity of ash is higher than that of pure coal. Moreover, the ash components have affinity for water and pure coal repels water, which in case of pure coal, works against the holding together of the blend. Hence, lower the ash content, less is the bulk density of cake under identical stamping energy and lower the bulk density, less is the oven throughput. In order to maximise the oven throughput and productivity, a study was conducted in the laboratory mainly to assess the effect of various blend constituents and their ash content on the bulk density of coal charge. The effect of ash content on the coal cake stability has also been dealt with. This study, in short, is a useful tool for selecting the right type of coals and designing the optimum blend for stamp charging to achieve maximum throughput and productivity. In addition, studies were also carried out to assess the effect of addition of various binders on coal cake stability at lower moisture level which would also help in achieving higher throughput and productivity.

  1. Brief introduction of stamping material utilization ratio%浅谈冲压材料利用率

    Institute of Scientific and Technical Information of China (English)

    赵建会

    2011-01-01

    For stamping, the level of technology and management of enterprises is reflected by material utilization ratio which is also one important index affecting economic benefits. Through the study of the stamping process and stamping production process, and with the help of computer-aided design, a set of ideas and methods for improving material utilization ratio was summarize. The specific examples for the crafts of material rim reduction, layout, the remaining material recycling, laser tailor-welded and blanking die were introduced, which provided a set of systematic and concrete methods to improving material utilization ratio. Moreover, it provides convenience to the method to prophase mould design and late mould modification.%对于冲压而言,材料利用率的高低反映出企业的技术水平和管理水平,同时也是影响经济效益的指标之一.通过对冲压工艺和冲压实际生产过程的研究,并且借助计算机辅助设计,总结出一套提升材料利用率的思路和方法.对料边缩减、排样、余料再利用、激光拼焊、开卷落料模具等技术给出了具体实例进行说明,为提高冲压材料利用率提供了系统、具体的方法,方便了模具前期设计和后期模具工艺的改进.

  2. CLASSIC APPROACH TO BUSINESS COACHING

    OpenAIRE

    Żukowska, Joanna

    2011-01-01

    The purpose of this paper is to present business coaching in a classical way. An overview of coaching definitions will be provided. Attention will be drawn to coaching components and varieties. Moreover, a brief description of coach competences and tools supporting their work will be offered. Joanna Żukowska

  3. On Classical and Quantum Cryptography

    CERN Document Server

    Volovich, I V; Volovich, Ya.I.

    2001-01-01

    Lectures on classical and quantum cryptography. Contents: Private key cryptosystems. Elements of number theory. Public key cryptography and RSA cryptosystem. Shannon`s entropy and mutual information. Entropic uncertainty relations. The no cloning theorem. The BB84 quantum cryptographic protocol. Security proofs. Bell`s theorem. The EPRBE quantum cryptographic protocol.

  4. Teaching Classical Mechanics Using Smartphones

    Science.gov (United States)

    Chevrier, Joel; Madani, Laya; Ledenmat, Simon; Bsiesy, Ahmad

    2013-01-01

    A number of articles published in this column have dealt with topics in classical mechanics. This note describes some additional examples employing a smartphone and the new software iMecaProf. Steve Jobs presented the iPhone as "perfect for gaming." Thanks to its microsensors connected in real time to the numerical world, physics…

  5. Supersymmetric classical mechanics: free case

    Energy Technology Data Exchange (ETDEWEB)

    Rodrigues, R. de Lima [Centro Brasileiro de Pesquisas Fisicas (CBPF), Rio de Janeiro, RJ (Brazil)]|[Paraiba Univ., Cajazeiras, PB (Brazil). Dept. de Ciencias Exatas e da Natureza]. E-mail: rafael@cfp.ufpb.br; Almeida, W. Pires de [Paraiba Univ., Cajazeiras, PB (Brazil). Dept. de Ciencias Exatas e da Natureza; Fonseca Neto, I. [Paraiba Univ., Campina Grande, PB (Brazil). Dept. de Fisica

    2001-06-01

    We present a review work on Supersymmetric Classical Mechanics in the context of a Lagrangian formalism, with N = 1-supersymmetry. We show that the N = 1 supersymmetry does not allow the introduction of a potencial energy term depending on a single commuting supercoordinate, {phi}(t;{theta}). (author)

  6. Relative Clauses in Classical Nahuatl

    Science.gov (United States)

    Langacker, Ronald W.

    1975-01-01

    Jane Rosenthal's paper on relative clauses in Classical Nahuatl is discussed, and it is argued that she misses an important generalization. An alternative analysis to a class of relative pronouns and new rules for the distribution of relative pronouns are proposed. (SC)

  7. Minimum signals in classical physics

    Institute of Scientific and Technical Information of China (English)

    邓文基; 许基桓; 刘平

    2003-01-01

    The bandwidth theorem for Fourier analysis on any time-dependent classical signal is shown using the operator approach to quantum mechanics. Following discussions about squeezed states in quantum optics, the problem of minimum signals presented by a single quantity and its squeezing is proposed. It is generally proved that all such minimum signals, squeezed or not, must be real Gaussian functions of time.

  8. Classical Virasoro irregular conformal block

    CERN Document Server

    Rim, Chaiho

    2015-01-01

    Virasoro irregular conformal block with arbitrary rank is obtained for the classical limit or equivalently Nekrasov-Shatashvili limit using the beta-deformed irregular matrix model (Penner-type matrix model for the irregular conformal block). The same result is derived using the generalized Mathieu equation which is equivalent to the loop equation of the irregular matrix model.

  9. Neo-classical impurity transport

    International Nuclear Information System (INIS)

    The neo-classical theory for impurity transport in a toroidal plasma is outlined, and the results discussed. A general account is given of the impurity behaviour and its dependence on collisionality. The underlying physics is described with special attention to the role of the poloidal rotation

  10. Functional Techniques in Classical Mechanics

    CERN Document Server

    Gozzi, E

    2001-01-01

    In 1931 Koopman and von Neumann extended previous work of Liouville and provided an operatorial version of Classical Mechanics (CM). In this talk we will review a path-integral formulation of this operatorial version of CM. In particular we will study the geometrical nature of the many auxiliary variables present and of the unexpected universal symmetries generated by the functional technique.

  11. Classical Music as Enforced Utopia

    Science.gov (United States)

    Leech-Wilkinson, Daniel

    2016-01-01

    In classical music composition, whatever thematic or harmonic conflicts may be engineered along the way, everything always turns out for the best. Similar utopian thinking underlies performance: performers see their job as faithfully carrying out their master's (the composer's) wishes. The more perfectly they represent them, the happier the…

  12. Supersymmetric classical mechanics: free case

    International Nuclear Information System (INIS)

    We present a review work on Supersymmetric Classical Mechanics in the context of a Lagrangian formalism, with N = 1-supersymmetry. We show that the N = 1 supersymmetry does not allow the introduction of a potencial energy term depending on a single commuting supercoordinate, φ(t;Θ). (author)

  13. The reduction of irregularities in the use of “process fmea”: a study for a cold stamping process

    Directory of Open Access Journals (Sweden)

    Carla Estorilio

    2011-12-01

    Full Text Available The Failure Mode and Effect Analysis (FMEA is a requirement for ISO/TS 16949. However, researches show nonconformities in its use by automotive suppliers. The objective of this study is to identify these nonconformities, aiming to suggest methods for minimizing this problem. Therefore, questionnaires were applied in seven automotive suppliers and, for each one, ten FMEA`s were analysed. The research identified nonconformities in the use of FMEA for the stamping process and highlighted seven influencing factors. Based on this data, a strategy is suggested. A partially parameterised FMEA spreadsheet is suggested and tested in three suppliers, showing significant improvements.

  14. Design and implementation of a nanosecond time-stamping readout system-on-chip for photo-detectors

    Energy Technology Data Exchange (ETDEWEB)

    Anvar, Shebli; Château, Frédéric; Le Provost, Hervé; Louis, Frédéric [CEA/Irfu/SEDI Gif-sur-Yvette (France); Manolopoulos, Konstantinos [Physics Department, University of Athens (Greece); Moudden, Yassir, E-mail: yassir.moudden@cea.fr [CEA/Irfu/SEDI Gif-sur-Yvette (France); Vallage, Bertrand [CEA/Irfu/SPP Gif-sur-Yvette (France); Zonca, Eric [CEA/Irfu/SEDI Gif-sur-Yvette (France)

    2014-01-21

    A readout system suitable for a large number of synchronized photo-detection units has been designed. Each unit embeds a specifically designed fully integrated communicating system based on Xilinx FPGA SoC technology. It runs the VxWorks real-time OS and a custom data acquisition software designed within the Ice middleware framework, resulting in a highly flexible, controllable and scalable distributed application. Clock distribution and delay calibration over customized fixed latency gigabit Ethernet links enable synchronous time-stamping of events with nanosecond precision. The implementation of this readout system on several data-collecting units as well as its performances are described.

  15. SU-D-9A-03: STAMP: Simulator for Texture Analysis in MRI/PET

    Energy Technology Data Exchange (ETDEWEB)

    Laberge, S; Vallieres, M; Levesque, I R.; El Naqa, I [McGill University, Montreal, QC (Canada)

    2014-06-01

    Purpose: To develop a convenient simulation platform to facilitate PET/MR image analysis with the prospect of gaining a better understanding of the influence of acquisition parameters on PET/MRI textural features. The simulation platform is demonstrated by showing textural variations of a representative case study using different image acquisition parameters. Methods: The simulation platform is composed of MRI simulators JEMRIS and SIMRI to achieve simulations of customized MRI sequences on sample tumor models. The PET simulator GATE is used to get 2D and 3D Monte Carlo acquisitions of voxelized PET sources using a phantom geometry and a customized scanner architecture. The platform incorporates a series of graphical user interfaces written in Matlab. Two GUIs are used to facilitate communication with the simulation executables installed on a computer cluster. A third GUI is used to collect and display the clinical and simulated images, as well as fused PET/MRI images, and perform computation of textural features.To illustrate the capabilities of this platform, one FDG-PET and T1-weighted (T1w) digitized tumor models were generated from clinical images of a soft-tissue sarcoma patient. Numerically simulated MR images were produced using 3 different echo times (TE) and 5 different repetition times (TR). PET 2D images were simulated using an OSEM algorithm with 1 to 32 iterations and a post-reconstruction Gaussian filter of 0, 2, 4 or 6 mm width. Results: STAMP was successfully used to produce numerically simulated FDG-PET and MRI images, and to calculate their corresponding textures. Three typical textures (GLCM-Contrast, GLSZM-ZSV and NGTDM-Coarseness) were found to vary by a range of 45% on average compared to reference scanning conditions in the case of FDG-PET, and by a range of 40% in the case of T1w MRI. Conclusion: We have successfully developed a Matlab-based simulation platform to facilitate PET/MRI texture image analysis for outcome prediction.

  16. SU-D-9A-03: STAMP: Simulator for Texture Analysis in MRI/PET

    International Nuclear Information System (INIS)

    Purpose: To develop a convenient simulation platform to facilitate PET/MR image analysis with the prospect of gaining a better understanding of the influence of acquisition parameters on PET/MRI textural features. The simulation platform is demonstrated by showing textural variations of a representative case study using different image acquisition parameters. Methods: The simulation platform is composed of MRI simulators JEMRIS and SIMRI to achieve simulations of customized MRI sequences on sample tumor models. The PET simulator GATE is used to get 2D and 3D Monte Carlo acquisitions of voxelized PET sources using a phantom geometry and a customized scanner architecture. The platform incorporates a series of graphical user interfaces written in Matlab. Two GUIs are used to facilitate communication with the simulation executables installed on a computer cluster. A third GUI is used to collect and display the clinical and simulated images, as well as fused PET/MRI images, and perform computation of textural features.To illustrate the capabilities of this platform, one FDG-PET and T1-weighted (T1w) digitized tumor models were generated from clinical images of a soft-tissue sarcoma patient. Numerically simulated MR images were produced using 3 different echo times (TE) and 5 different repetition times (TR). PET 2D images were simulated using an OSEM algorithm with 1 to 32 iterations and a post-reconstruction Gaussian filter of 0, 2, 4 or 6 mm width. Results: STAMP was successfully used to produce numerically simulated FDG-PET and MRI images, and to calculate their corresponding textures. Three typical textures (GLCM-Contrast, GLSZM-ZSV and NGTDM-Coarseness) were found to vary by a range of 45% on average compared to reference scanning conditions in the case of FDG-PET, and by a range of 40% in the case of T1w MRI. Conclusion: We have successfully developed a Matlab-based simulation platform to facilitate PET/MRI texture image analysis for outcome prediction

  17. Event for the launch of the Georges Charpak postage stamp | 26-27 February | Prévessin site

    CERN Multimedia

    2016-01-01

    At the end of February, the French post office is releasing a new €0.70 stamp featuring an image of Georges Charpak. CERN is taking part in this event by hosting a temporary post office on the Prévessin site, which will sell the stamp with a special “first day” postmark before it goes on general sale.     Georges Charpak arrived at CERN in 1959 and, in the late 1960s, revolutionised particle detection technology by developing the multiwire proportional chamber. This technique brought particle detectors into the electronic era, setting physicists free from the laborious task of studying photographs one by one. In 1992, he was awarded the Nobel Prize in Physics for his invention. Charpak chambers are still used today in the LHC detectors and have paved the way for the technology in numerous other modern detectors. In the 1990s, Charpak was involved in developing medical applications based on particle detection technology. He was als...

  18. Classical Probability and Quantum Outcomes

    Directory of Open Access Journals (Sweden)

    James D. Malley

    2014-05-01

    Full Text Available There is a contact problem between classical probability and quantum outcomes. Thus, a standard result from classical probability on the existence of joint distributions ultimately implies that all quantum observables must commute. An essential task here is a closer identification of this conflict based on deriving commutativity from the weakest possible assumptions, and showing that stronger assumptions in some of the existing no-go proofs are unnecessary. An example of an unnecessary assumption in such proofs is an entangled system involving nonlocal observables. Another example involves the Kochen-Specker hidden variable model, features of which are also not needed to derive commutativity. A diagram is provided by which user-selected projectors can be easily assembled into many new, graphical no-go proofs.

  19. Coupled Classical and Quantum Oscillators

    CERN Document Server

    McDermott, R M; Dermott, Rachael M. Mc; Redmount, Ian H.

    2004-01-01

    Some of the most enduring questions in physics--including the quantum measurement problem and the quantization of gravity--involve the interaction of a quantum system with a classical environment. Two linearly coupled harmonic oscillators provide a simple, exactly soluble model for exploring such interaction. Even the ground state of a pair of identical oscillators exhibits effects on the quantum nature of one oscillator, e.g., a diminution of position uncertainty, and an increase in momentum uncertainty and uncertainty product, from their unperturbed values. Interaction between quantum and classical oscillators is simulated by constructing a quantum state with one oscillator initially in its ground state, the other in a coherent or Glauber state. The subsequent wave function for this state is calculated exactly, both for identical and distinct oscillators. The reduced probability distribution for the quantum oscillator, and its position and momentum expectation values and uncertainties, are obtained from thi...

  20. Classical theory of algebraic numbers

    CERN Document Server

    Ribenboim, Paulo

    2001-01-01

    Gauss created the theory of binary quadratic forms in "Disquisitiones Arithmeticae" and Kummer invented ideals and the theory of cyclotomic fields in his attempt to prove Fermat's Last Theorem These were the starting points for the theory of algebraic numbers, developed in the classical papers of Dedekind, Dirichlet, Eisenstein, Hermite and many others This theory, enriched with more recent contributions, is of basic importance in the study of diophantine equations and arithmetic algebraic geometry, including methods in cryptography This book has a clear and thorough exposition of the classical theory of algebraic numbers, and contains a large number of exercises as well as worked out numerical examples The Introduction is a recapitulation of results about principal ideal domains, unique factorization domains and commutative fields Part One is devoted to residue classes and quadratic residues In Part Two one finds the study of algebraic integers, ideals, units, class numbers, the theory of decomposition, iner...

  1. Classical Equations for Quantum Systems

    CERN Document Server

    Gell-Mann, Murray; Gell-Mann, Murray; Hartle, James B.

    1993-01-01

    The origin of the phenomenological deterministic laws that approximately govern the quasiclassical domain of familiar experience is considered in the context of the quantum mechanics of closed systems such as the universe as a whole. We investigate the requirements for coarse grainings to yield decoherent sets of histories that are quasiclassical, i.e. such that the individual histories obey, with high probability, effective classical equations of motion interrupted continually by small fluctuations and occasionally by large ones. We discuss these requirements generally but study them specifically for coarse grainings of the type that follows a distinguished subset of a complete set of variables while ignoring the rest. More coarse graining is needed to achieve decoherence than would be suggested by naive arguments based on the uncertainty principle. Even coarser graining is required in the distinguished variables for them to have the necessary inertia to approach classical predictability in the presence of t...

  2. Teaching Classical Mechanics using Smartphones

    CERN Document Server

    Chevrier, Joel; Ledenmat, Simon; Bsiesy, Ahmad

    2012-01-01

    Using a personal computer and a smartphone, iMecaProf is a software that provides a complete teaching environment for practicals associated to a Classical Mechanics course. iMecaProf proposes a visual, real time and interactive representation of data transmitted by a smartphone using the formalism of Classical Mechanics. Using smartphones is more than using a set of sensors. iMecaProf shows students that important concepts of physics they here learn, are necessary to control daily life smartphone operations. This is practical introduction to mechanical microsensors that are nowadays a key technology in advanced trajectory control. First version of iMecaProf can be freely downloaded. It will be tested this academic year in Universit\\'e Joseph Fourier (Grenoble, France)

  3. A Companion to Classical Receptions

    Directory of Open Access Journals (Sweden)

    A. De Villiers

    2012-03-01

    Full Text Available This recent addition to the excellent Blackwell Companions series looks at the various forms of classical reception currently being researched as well as those deemed to have future importance. The diversity and volume of the themes and approaches contained in this book are truly impressive. As Hardwick and Stray state in their introduction, this collection “has been constructed on the basis that the activators of reception are many and varied and that we all gain from encountering examples from outside our own immediate areas of knowledge” (p. 4. Throughout the book they stay true to this motto and traditional approaches to classical reception are not given prominence over more recent (sometimes contentious approaches such as film studies, cultural politics and photography. The same goes for the various cultures involved and there is even a chapter on Greek drama in South Africa.

  4. Semi-classical signal analysis

    KAUST Repository

    Laleg-Kirati, Taous-Meriem

    2012-09-30

    This study introduces a new signal analysis method, based on a semi-classical approach. The main idea in this method is to interpret a pulse-shaped signal as a potential of a Schrödinger operator and then to use the discrete spectrum of this operator for the analysis of the signal. We present some numerical examples and the first results obtained with this method on the analysis of arterial blood pressure waveforms. © 2012 Springer-Verlag London Limited.

  5. Logical, conditional, and classical probability

    OpenAIRE

    Quznetsov, G. A.

    2005-01-01

    The propositional logic is generalized on the real numbers field. the logical function with all properties of the classical probability function is obtained. The logical analog of the Bernoulli independent tests scheme is constructed. The logical analog of the Large Number Law is deduced from properties of these functions. The logical analog of thd conditional probability is defined. Consistency encured by a model on a suitable variant of the nonstandard analysis.

  6. Classic ballet dancers postural patterns

    OpenAIRE

    Joseani Paulini Neves Simas; Sebastião Iberes Lopes Melo

    2008-01-01

    The aim of this study was to evaluate classic ballet practice and its influence on postural patterns and (a) identify the most frequent postural changes; (b) determine the postural pattern; (c) verify the existence of association of practice time and postural changes. The investigation was carried out in two stages: one, description in which 106 dancers participated; the other, causal comparative in which 50 dancers participated; and (a) questionnaire; (b) a checkerboard; (c) postural chart; ...

  7. Gauge Invariance in Classical Electrodynamics

    CERN Document Server

    Engelhardt, W

    2005-01-01

    The concept of gauge invariance in classical electrodynamics assumes tacitly that Maxwell's equations have unique solutions. By calculating the electromagnetic field of a moving particle both in Lorenz and in Coulomb gauge and directly from the field equations we obtain, however, contradicting solutions. We conclude that the tacit assumption of uniqueness is not justified. The reason for this failure is traced back to the inhomogeneous wave equations which connect the propagating fields and their sources at the same time.

  8. Quantum manifolds with classical limit

    CERN Document Server

    Hohmann, Manuel; Wohlfarth, Mattias N R

    2008-01-01

    We propose a mathematical model of quantum spacetime as an infinite-dimensional manifold locally homeomorphic to an appropriate Schwartz space. This extends and unifies both the standard function space construction of quantum mechanics and the manifold structure of spacetime. In this picture we demonstrate that classical spacetime emerges as a finite-dimensional manifold through the topological identification of all quantum points with identical position expectation value. We speculate on the possible relevance of this geometry to quantum field theory and gravity.

  9. Semi-classical signal analysis

    CERN Document Server

    Laleg-Kirati, Taous-Meriem; Sorine, Michel

    2010-01-01

    This study introduces a new signal analysis method called SCSA, based on a semi-classical approach. The main idea in the SCSA is to interpret a pulse-shaped signal as a potential of a Schr\\"odinger operator and then to use the discrete spectrum of this operator for the analysis of the signal. We present some numerical examples and the first results obtained with this method on the analysis of arterial blood pressure waveforms.

  10. Rindler particles and classical radiation

    International Nuclear Information System (INIS)

    We describe the quantum and classical radiation emitted by a uniformly accelerating point source in terms of the elementary processes of absorption and emission of Rindler scalar photons of the Fulling-Davies-Unruh bath observed by a co-accelerating observer. To this end we compute the rate at which a DeWitt detector emits a Minkowski scalar particle with defined transverse momentum per unit of proper time of the source and we show that it corresponds to the induced absorption or spontaneous and induced emission of Rindler particles from the thermal bath. We then take what could be called the inert limit of the DeWitt detector by considering the limit of no energy gap. As suggested by DeWitt, we identify, in this limit, the detector with a classical point source and verify the consistency of our computation with the classical result. Finally, we study the behaviour of the emission rate in D spacetime dimensions in connection with the so-called apparent statistics inversion

  11. Rindler Photons and Classical Radiation

    CERN Document Server

    Díaz, D E

    2001-01-01

    We describe the quantum and classical radiation by a uniformly accelerating point source in terms of the elementary processes of absorption and emission of Rindler scalar photons of the Fulling-Davies-Unruh bath observed by a co-accelerating observer.To this end we compute the emission rate by a DeWitt detector of a Minkowski scalar field particle with defined transverse momentum per unit of proper time of the source and we show that it corresponds to the induced absorption or spontaneous and induced emission of Rindler photons from the thermal bath. We then take what could be called the inert limit of the DeWitt detector by considering the limit of zero gap energy. As suggested by DeWitt, we identify in this limit the detector with a classical point source and verify the consistency of our computation with the classical result. Finally, we study the behavior of the emission rate in D space-time dimensions in connection with the so called apparent statistics inversion.

  12. Quantum to Classical Randomness Extractors

    CERN Document Server

    Berta, Mario; Wehner, Stephanie

    2011-01-01

    Even though randomness is an essential resource for many information processing tasks, it is not easily found in nature. The goal of randomness extraction is to distill (almost) perfect randomness from a weak source of randomness. When the source yields a classical string X, many extractor constructions are known. Yet, when considering a physical randomness source, X is itself ultimately the result of a measurement on an underlying quantum system. When characterizing the power of a source to supply randomness it is hence a natural question to ask, how much classical randomness we can extract from a quantum state. To tackle this question we here take on the study of quantum-to-classical randomness extractors (QC-extractors). We provide constructions of QC-extractors based on measurements in a full set of mutually unbiased bases (MUBs), and certain single qubit measurements. As the first application, we show that any QC-extractor gives rise to entropic uncertainty relations with respect to quantum side informat...

  13. Quantum-Classical Correspondence: Dynamical Quantization and the Classical Limit

    Energy Technology Data Exchange (ETDEWEB)

    Turner, L [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

    2004-11-12

    In only 150 pages, not counting appendices, references, or the index, this book is one author's perspective of the massive theoretical and philosophical hurdles in the no-man's-land separating the classical and quantum domains of physics. It ends with him emphasizing his own theoretical contribution to this area. In his own words, he has attempted to answer: 1. How can we obtain the quantum dynamics of open systems initially described by the equations of motion of classical physics (quantization process) 2. How can we retrieve classical dynamics from the quantum mechanical equations of motion by means of a classical limiting process (dequantization process). However, this monograph seems overly ambitious. Although the publisher's description refers to this book as an accessible entre, we find that this author scrambles too hastily over the peaks of information that are contained in his large collection of 272 references. Introductory motivating discussions are lacking. Profound ideas are glossed over superficially and shoddily. Equations morph. But no new convincing understanding of the physical world results. The author takes the viewpoint that physical systems are always in interaction with their environment and are thus not isolated and, therefore, not Hamiltonian. This impels him to produce a method of quantization of these stochastic systems without the need of a Hamiltonian. He also has interest in obtaining the classical limit of the quantized results. However, this reviewer does not understand why one needs to consider open systems to understand quantum-classical correspondence. The author demonstrates his method using various examples of the Smoluchowski form of the Fokker--Planck equation. He then renders these equations in a Wigner representation, uses what he terms an infinitesimality condition, and associates with a constant having the dimensions of an action. He thereby claims to develop master equations, such as the Caldeira

  14. Improving stamping simulation accuracy by accounting for realistic friction and lubrication conditions: Application to the door-outer of the Mercedes-Benz C-class Coupé

    Science.gov (United States)

    Hol, J.; Wiebenga, J. H.; Stock, J.; Wied, J.; Wiegand, K.; Carleer, B.

    2016-08-01

    In the stamping of automotive parts, friction and lubrication play a key role in achieving high quality products. In the development process of new automotive parts, it is therefore crucial to accurately account for these effects in sheet metal forming simulations. Only then, one can obtain reliable and realistic simulation results that correspond to the actual try-out and mass production conditions. In this work, the TriboForm software is used to accurately account for tribology-, friction-, and lubrication conditions in stamping simulations. The enhanced stamping simulations are applied and validated for the door-outer of the Mercedes- Benz C-Class Coupe. The project results demonstrate the improved prediction accuracy of stamping simulations with respect to both part quality and actual stamping process conditions.

  15. Intuitionism vs. classicism a mathematical attack on classical logic

    CERN Document Server

    Haverkamp, Nick

    2015-01-01

    In the early twentieth century, the Dutch mathematician L.E.J. Brouwer launched a powerful attack on the prevailing mathematical methods and theories. He developed a new kind of constructive mathematics, called intuitionism, which seems to allow for a rigorous refutation of widely accepted mathematical assumptions including fundamental principles of classical logic. Following an intense mathematical debate esp. in the 1920s, Brouwer's revolutionary criticism became a central philosophical concern in the 1970s, when Michael Dummett tried to substantiate it with meaning-theoretic considerations.

  16. Research on Stamp Investment and Diversification for Stock Investment-Based on the Research of Chinese and British Stamp Price Indexes%邮票投资与股票投资多元化问题研究--基于中国和英国的邮票价格指数研究

    Institute of Scientific and Technical Information of China (English)

    赵景东; 孙文婷; 冯玉英

    2013-01-01

    受英国SG100邮票价格指数启发,借鉴股票价格指数的建立方法,运用中国邮票互动网上提供的邮票收盘价和成交量计算出了中国邮票月度价格指数。在此基础上,将邮票价格指数的超额回报与股票价格指数的超额回报进行资本资产定价模型回归,结果显示中国邮票投资并不能为股票投资者提供多元化的可能,但英国邮票投资给中国股票投资者提供了多元化的可能,产生了超额收益,分散了风险。%We are inspired by British SG100 Stamp Price Index to build Chinese Stamp Price Index by ourselves. We make use of closing price and trading volume of stamps which are available online to calculate the monthly price indexes of Chi-nese stamps. The results of the Capital Asset Pricing Model regression of the monthly stamp index excess returns and the excess returns of stock indexes show that investing in Chinese stamp can’t provide portfolio diversification benefits for stock investors. Adding British stamps to Chinese stock portfolios can improve the investment performance of investors.

  17. The Relation between Classical and Quantum Electrodynamics

    Directory of Open Access Journals (Sweden)

    Mario Bacelar Valente

    2011-01-01

    Full Text Available Quantum electrodynamics presents intrinsic limitations in the description of physical processes that make it impossible to recover from it the type of description we have in classical electrodynamics. Hence one cannot consider classical electrodynamics as reducing to quantum electrodynamics and being recovered from it by some sort of limiting procedure. Quantum electrodynamics has to be seen not as an more fundamental theory, but as an upgrade of classical electrodynamics, which permits an extension of classical theory to the description of phenomena that, while being related to the conceptual framework of the classical theory, cannot be addressed from the classical theory.

  18. Classical trajectories and quantum tunneling

    CERN Document Server

    Ivlev, B I

    2003-01-01

    The problem of inter-band tunneling in a semiconductor (Zener breakdown) in a nonstationary and homogeneous electric field is solved exactly. Using the exact analytical solution, the approximation based on classical trajectories is studied. A new mechanism of enhanced tunneling through static non-one-dimensional barriers is proposed in addition to well known normal tunneling solely described by a trajectory in imaginary time. Under certain conditions on the barrier shape and the particle energy, the probability of enhanced tunneling is not exponentially small even for non-transparent barriers, in contrast to the case of normal tunneling.

  19. Lectures on classical differential geometry

    CERN Document Server

    Struik, Dirk J

    1988-01-01

    Elementary, yet authoritative and scholarly, this book offers an excellent brief introduction to the classical theory of differential geometry. It is aimed at advanced undergraduate and graduate students who will find it not only highly readable but replete with illustrations carefully selected to help stimulate the student's visual understanding of geometry. The text features an abundance of problems, most of which are simple enough for class use, and often convey an interesting geometrical fact. A selection of more difficult problems has been included to challenge the ambitious student.Writ

  20. Agglomeration Economies in Classical Music

    DEFF Research Database (Denmark)

    Borowiecki, Karol Jan

    2015-01-01

    This study investigates agglomeration effects for classical music production in a wide range of cities for a global sample of composers born between 1750 and 1899. Theory suggests a trade-off between agglomeration economies (peer effects) and diseconomies (peer crowding). I test this hypothesis...... using historical data on composers and employ a unique instrumental variable – a measure of birth centrality, calculated as the average distance between a composer’s birthplace and the birthplace of his peers. I find a strong causal impact of peer group size on the number of important compositions...

  1. Advances In Classical Field Theory

    CERN Document Server

    Yahalom, Asher

    2011-01-01

    Classical field theory is employed by physicists to describe a wide variety of physical phenomena. These include electromagnetism, fluid dynamics, gravitation and quantum mechanics. The central entity of field theory is the field which is usually a multi component function of space and time. Those multi component functions are usually grouped together as vector fields as in the case in electromagnetic theory and fluid dynamics, in other cases they are grouped as tensors as in theories of gravitation and yet in other cases they are grouped as complex functions as in the case of quantum mechanic

  2. Solar Activity and Classical Physics

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    This review of solar physics emphasizes several of the more conspicuous scientific puzzles posed by contemporary observational knowledge of the magnetic activity of the Sun. The puzzles emphasize how much classical physics we have yet to learn from the Sun. The physics of solar activity is based on the principles of Newton, Maxwell, Lorentz, Boltzmann, et. al., along with the principles of radiative transfer. In the large, these principles are expressed by magnetohydrodynamics. A brief derivation of the magnetohydrodynamic induction and momentum equations is provided, with a discussion of popular misconceptions.

  3. Classical Electron Theory and Conservation Laws

    OpenAIRE

    Kiessling, Michael K. -H.

    1999-01-01

    It is shown that the traditional conservation laws for total charge, energy, linear and angular momentum, hold jointly in classical electron theory if and only if classical electron spin is included as dynamical degree of freedom.

  4. Pseudoclassical fermionic model and classical solutions

    International Nuclear Information System (INIS)

    We study classical limit of fermionic fields seen as Grassmann variables and deduce the proper quantization prescription using Dirac's method for constrained systems and investigate quantum meaning of classical solutions for the Thirring model. (author)

  5. The revision of classical stock model

    Institute of Scientific and Technical Information of China (English)

    叶柏青; 王洪利

    2001-01-01

    On the basis of the analysis of classical stock model, according to the limitation of the model, the article puts forward the revision of classical model and enforces the applicability of the stock model.

  6. The revision of classical stock model

    Institute of Scientific and Technical Information of China (English)

    YE Bai-qing; WANG Hong-li

    2001-01-01

    On the basis of the analysis of classical stock model, according to th e limitation of the model, the article puts forward the revision of classical mo del and enforces the applicability of the stock model.

  7. Lagrangian formalism and retarded classical electrodynamics

    OpenAIRE

    Jan, Xavier; Llosa, Josep; Molina, Alfred

    1989-01-01

    Unlike the 1/c2 approximation, where classical electrodynamics is described by the Darwin Lagrangian, here there is no Lagrangian to describe retarded (resp., advanced) classical electrodynamics up to 1/c3 for two-point charges with different masses.

  8. The Confluence of Sociology, Statistics, and Public Policy in the Quality Control of the Food Stamps, AFDC, and Medicaid Family Assistance Programs.

    Science.gov (United States)

    Press, S. James; Tanur, Judith M.

    1991-01-01

    Relevance of the intersection of sociology, statistics, and public policy to the study of quality control in three family assistance programs--food stamps, Aid to Families with Dependent Children (AFDC), and Medicaid--is reviewed using a study by the National Academy of Sciences of methods for improving quality control systems. (SLD)

  9. Use of the Performance Diagnostic Checklist to Select an Intervention Designed to Increase the Offering of Promotional Stamps at Two Sites of a Restaurant Franchise

    Science.gov (United States)

    Rodriguez, Manuel; Wilder, David A.; Therrien, Kelly; Wine, Byron; Miranti, Reylissa; Daratany, Kenneth; Salume, Gloria; Baranovsky, Greg; Rodriquez, Matias

    2006-01-01

    The performance diagnostic checklist (PDC) was administered to examine the variables influencing the offering of promotional stamps by employees at two sites of a restaurant franchise. PDC results suggested that a lack of appropriate antecedents, equipment and processes, and consequences were responsible for the deficits. Based on these results,…

  10. ASME规范NPT钢印取证容器的焊接%Welding of NPT-Stamped Vessel in Accordance with ASME Code

    Institute of Scientific and Technical Information of China (English)

    吴佳

    2014-01-01

    结合ASME规范,介绍ASME NPT钢印取证容器焊接过程。%Based on ASME Boiler&Pressure Vessel Code, the paper explains how to conduct welding operation on NPT-Stamped vessels that are certificated in accordance with ASME code.

  11. About the modern house - and the classical

    DEFF Research Database (Denmark)

    Hauberg, Jørgen

    2010-01-01

    In text and illustrations describes the classical house and the classical city, represented by Andrea Palladio (1508-80), and the modern house, the modern city and building task, represented by Le Corbusier (1857-1965).......In text and illustrations describes the classical house and the classical city, represented by Andrea Palladio (1508-80), and the modern house, the modern city and building task, represented by Le Corbusier (1857-1965)....

  12. Technics of classical and digital photography comparsion

    OpenAIRE

    Kvapilová, Kamila

    2012-01-01

    This bachelor work is aimed at basic principles of taking photos by classical and digital camera. Describes methods for achieving of required photos by digital way and also classical taking photos on cine-film. Compares the technology of classical and digital photography from the beginning, which is getting the camera and accessories. It also describes the construction and control of the camera. Processing of photo compares the quality of digital and classic photo.

  13. The new-classical contribution to macroeconomics

    OpenAIRE

    D. LAIDLER

    2013-01-01

    This work is devoted to assessing New-Classical ideas, and to asking what of lasting importance this school of macroeconomics has contributed since the early 1970s. It deals in turn with the relationship between New-Classical Economics and Monetarism, the relative explanatory power of these two bodies of doctrine over empirical evidence, and the claims of New-Classical Economics to embody a superior analytic method. The author argues that, although the particular ways in which New-Classical M...

  14. Classical equations for quantum systems

    Energy Technology Data Exchange (ETDEWEB)

    Gell-Mann, M. (Theoretical Astrophysics Group (T-6), Los Alamos National Laboratory, Los Alamos, New Mexico 87545) (United States) (Santa Fe Institute, 1660 Old Pecos Trail, Santa Fe, New Mexico 87501); Hartle, J.B. (Department of Physics, University of California enSanta Barbara, Santa Barbara, (California) 93106)

    1993-04-15

    The origin of the phenomenological deterministic laws that approximately govern the quasiclassical domain of familiar experience is considered in the context of the quantum mechanics of closed systems such as the universe as a whole. A formulation of quantum mechanics is used that predicts probabilities for the individual members of a set of alternative coarse-grained histories that [ital decohere], which means that there is negligible quantum interference between the individual histories in the set. We investigate the requirements for coarse grainings to yield decoherent sets of histories that are quasiclassical, i.e., such that the individual histories obey, with high probability, effective classical equations of motion interrupted continually by small fluctuations and occasionally by large ones. We discuss these requirements generally but study them specifically for coarse grainings of the type that follows a distinguished subset of a complete set of variables while ignoring the rest. More coarse graining is needed to achieve decoherence than would be suggested by naive arguments based on the uncertainty principle. Even coarser graining is required in the distinguished variables for them to have the necessary inertia to approach classical predictability in the presence of the noise consisting of the fluctuations that typical mechanisms of decoherence produce. We describe the derivation of phenomenological equations of motion explicitly for a particular class of models.

  15. Entanglement-Enhanced Classical Communication

    CERN Document Server

    Herrera-Martí, David A

    2008-01-01

    This thesis will be focused on the classical capacity of quantum channels, one of the first areas treated by quantum information theorists. The problem is fairly solved since some years. Nevertheless, this work will give me a reason to introduce a consistent formalism of the quantum theory, as well as to review fundamental facts about quantum non-locality and how it can be used to enhance communication. Moreover, this reflects my dwelling in the spirit of classical information theory, and it is intended to be a starting point towards a thorough study of how quantum technologies can help to shape the future of telecommunications. Whenever it was possible, heuristic reasonings were introduced instead of rigorous mathematical proofs. This finds an explanation in that I am a self-taught neophyte in the field, and just about every time I came across a new concept, physical arguments were always more compelling to me than just maths. The technical content of the thesis is twofold. On one hand, a quadratic classific...

  16. Classical Black Holes Are Hot

    CERN Document Server

    Curiel, Erik

    2014-01-01

    In the early 1970s it is was realized that there is a striking formal analogy between the Laws of black-hole mechanics and the Laws of classical thermodynamics. Before the discovery of Hawking radiation, however, it was generally thought that the analogy was only formal, and did not reflect a deep connection between gravitational and thermodynamical phenomena. It is still commonly held that the surface gravity of a stationary black hole can be construed as a true physical temperature and its area as a true entropy only when quantum effects are taken into account; in the context of classical general relativity alone, one cannot cogently construe them so. Does the use of quantum field theory in curved spacetime offer the only hope for taking the analogy seriously? I think the answer is `no'. To attempt to justify that answer, I shall begin by arguing that the standard argument to the contrary is not physically well founded, and in any event begs the question. Looking at the various ways that the ideas of "tempe...

  17. Fluctuations in classical sum rules.

    Science.gov (United States)

    Elton, John R; Lakshminarayan, Arul; Tomsovic, Steven

    2010-10-01

    Classical sum rules arise in a wide variety of physical contexts. Asymptotic expressions have been derived for many of these sum rules in the limit of long orbital period (or large action). Although sum-rule convergence may well be exponentially rapid for chaotic systems in a global phase-space sense with time, individual contributions to the sums may fluctuate with a width which diverges in time. Our interest is in the global convergence of sum rules as well as their local fluctuations. It turns out that a simple version of a lazy baker map gives an ideal system in which classical sum rules, their corrections, and their fluctuations can be worked out analytically. This is worked out in detail for the Hannay-Ozorio sum rule. In this particular case the rate of convergence of the sum rule is found to be governed by the Pollicott-Ruelle resonances, and both local and global boundaries for which the sum rule may converge are given. In addition, the width of the fluctuations is considered and worked out analytically, and it is shown to have an interesting dependence on the location of the region over which the sum rule is applied. It is also found that as the region of application is decreased in size the fluctuations grow. This suggests a way of controlling the length scale of the fluctuations by considering a time dependent phase-space volume, which for the lazy baker map decreases exponentially rapidly with time.

  18. Quantum electrodynamics in a classical approximation, 1

    International Nuclear Information System (INIS)

    Quantum electrodynamics is formulated in a classical approximation. A quantum mechanical proper-time is employed as a useful parameter, which enables us to elucidate the relationship between quantum electrodynamics and classical electrodynamics. The classical motion of a charged particle is realized as an asymptotic limit of quantum electrodynamics. (author)

  19. Collection of problems in classical mechanics

    CERN Document Server

    Kotkin, G L; ter Haar, D

    1971-01-01

    Collection of Problems in Classical Mechanics presents a set of problems and solutions in physics, particularly those involving mechanics. The coverage of the book includes 13 topics relevant to classical mechanics, such as integration of one-dimensional equations of motion; the Hamiltonian equations of motion; and adiabatic invariants. The book will be of great use to physics students studying classical mechanics.

  20. Diminuendo: Classical Music and the Academy

    Science.gov (United States)

    Asia, Daniel

    2010-01-01

    How is the tradition of Western classical music faring on university campuses? Before answering this question, it is necessary to understand what has transpired with classical music in the wider culture, as the relationship between the two is so strong. In this article, the author discusses how classical music has taken a big cultural hit in…

  1. Adhesiveless Transfer Printing of Ultrathin Microscale Semiconductor Materials by Controlling the Bending Radius of an Elastomeric Stamp.

    Science.gov (United States)

    Cho, Sungbum; Kim, Namyun; Song, Kwangsun; Lee, Jongho

    2016-08-01

    High-performance electronic devices integrated onto unconventional substrates provide opportunities for use in diverse applications, such as wearable or implantable forms of electronic devices. However, the interlayer adhesives between the electronic devices and substrates often limit processing temperature or cause electrical or thermal resistance at the interface. This paper introduces a very simple but effective transfer printing method that does not require an interlayer adhesive. Controlling the bending radius of a simple flat stamp enables picking up or printing of microscale semiconductor materials onto rigid, curvilinear, or flexible surfaces without the aid of a liquid adhesive. Theoretical and experimental studies reveal the underlying mechanism of the suggested approach. Adhesiveless printing of thin Si plates onto diverse substrates demonstrates the capability of this method. PMID:27458878

  2. New developments in classical chaotic scattering.

    Science.gov (United States)

    Seoane, Jesús M; Sanjuán, Miguel A F

    2013-01-01

    Classical chaotic scattering is a topic of fundamental interest in nonlinear physics due to the numerous existing applications in fields such as celestial mechanics, atomic and nuclear physics and fluid mechanics, among others. Many new advances in chaotic scattering have been achieved in the last few decades. This work provides a current overview of the field, where our attention has been mainly focused on the most important contributions related to the theoretical framework of chaotic scattering, the fractal dimension, the basins boundaries and new applications, among others. Numerical techniques and algorithms, as well as analytical tools used for its analysis, are also included. We also show some of the experimental setups that have been implemented to study diverse manifestations of chaotic scattering. Furthermore, new theoretical aspects such as the study of this phenomenon in time-dependent systems, different transitions and bifurcations to chaotic scattering and a classification of boundaries in different types according to symbolic dynamics are also shown. Finally, some recent progress on chaotic scattering in higher dimensions is also described.

  3. Experimental verification of tailor welded joining partners for hot stamping and analytical modeling of TWBs rheological constitutive in austenitic state

    Energy Technology Data Exchange (ETDEWEB)

    Tang, Bingtao, E-mail: tbtsh@hotmail.com [School of Materials Science and Engineering, Shandong Jianzhu University, Shandong, Jinan 250101 (China); State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Hunan, Changsha 410082 (China); Yuan, Zhengjun; Cheng, Gang [School of Mechanical and Electronic Engineering, Shandong Jianzhu University, Jinan 250101 (China); Huang, Lili; Zheng, Wei [School of Materials Science and Engineering, Shandong Jianzhu University, Shandong, Jinan 250101 (China); Xie, Hui [State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Hunan, Changsha 410082 (China)

    2013-11-15

    Hot stamping of quenchable ultra high strength steels currently represents a standard forming technology in the automotive industry for the manufacture of safety and crash relevant components. Recently, hot stamping of Tailor-Welded Blanks (TWBs) is proposed to meet the environmental and safety requirements by supplying car structural body components with functionally optimized and tailored mechanical properties. In this paper, an appropriate partner material for the quenchenable boron steel B1500HS based on the phase transformation and deformation behavior under process relevant conditions is determined. It is generally accepted that the mechanical properties for joint partner after quenching process should meet the following requirements. The value of yield strength (YS) should be between 350 and 500 MPa. The ultimate tensile strength (UTS) should be within the limits of 500–650 MPa, and the total elongation (TEL) until rupture should be higher than 13%. Two kinds of High Strength Low Alloy (HSLA) cold rolled steels B340LA and B410LA are chosen for verification of which one is appropriate as joint partner. Microhardness is measured and metallographic is investigated on different base materials and corresponding weld seams. It is pointed out that the B340LA steel is an appropriate joint partner with ideal thermal and mechanical properties. An optimized Arrhenius constitutive law is implemented to improve the characterization and description of the mechanical properties of the base and joint partner, as well as the weld seam in austenitic state. The comparisons with simplified Hensel–Spittel constitutive model show the optimized Arrhenius constitutive law describes the experimental data fairly well.

  4. Hydrogen Beyond the Classic Approximation

    CERN Document Server

    Scivetti, I

    2003-01-01

    The classical nucleus approximation is the most frequently used approach for the resolution of problems in condensed matter physics.However, there are systems in nature where it is necessary to introduce the nuclear degrees of freedom to obtain a correct description of the properties.Examples of this, are the systems with containing hydrogen.In this work, we have studied the resolution of the quantum nuclear problem for the particular case of the water molecule.The Hartree approximation has been used, i.e. we have considered that the nuclei are distinguishable particles.In addition, we have proposed a model to solve the tunneling process, which involves the resolution of the nuclear problem for configurations of the system away from its equilibrium position

  5. Introducing Newton and classical physics

    CERN Document Server

    Rankin, William

    2002-01-01

    The rainbow, the moon, a spinning top, a comet, the ebb and flood of the oceans ...a falling apple. There is only one universe and it fell to Isaac Newton to discover its secrets. Newton was arguably the greatest scientific genius of all time, and yet he remains a mysterious figure. Written and illustrated by William Rankin, "Introducting Newton and Classical Physics" explains the extraordinary ideas of a man who sifted through the accumulated knowledge of centuries, tossed out mistaken beliefs, and single-handedly made enormous advances in mathematics, mechanics and optics. By the age of 25, entirely self-taught, he had sketched out a system of the world. Einstein's theories are unthinkable without Newton's founding system. He was also a secret heretic, a mystic and an alchemist, the man of whom Edmund Halley said "Nearer to the gods may no man approach!". This is an ideal companion volume to "Introducing Einstein".

  6. Classical databases and knowledge organization

    DEFF Research Database (Denmark)

    Hjørland, Birger

    2015-01-01

    examines this claim and argues for the continued value of Boolean systems, which suggests two further considerations: (1) the important role of human expertise in searching (expert searchers and “information literate” users) and (2) the role of library and information science and knowledge organization (KO......This paper considers classical bibliographic databases based on the Boolean retrieval model (such as MEDLINE and PsycInfo). This model is challenged by modern search engines and information retrieval (IR) researchers, who often consider Boolean retrieval a less efficient approach. The paper...... into (ranked) sets of relevant documents, whereas the latter aims to increase the “selection power” of users. The Boolean retrieval model is valuable in providing users with the power to make informed searches and have full control over what is found and what is not. These issues may have significant...

  7. DOE Fundamentals Handbook: Classical Physics

    International Nuclear Information System (INIS)

    The Classical Physics Fundamentals Handbook was developed to assist nuclear facility operating contractors provide operators, maintenance personnel, and the technical staff with the necessary fundamentals training to ensure a basic understanding of physical forces and their properties. The handbook includes information on the units used to measure physical properties; vectors, and how they are used to show the net effect of various forces; Newton's Laws of motion, and how to use these laws in force and motion applications; and the concepts of energy, work, and power, and how to measure and calculate the energy involved in various applications. This information will provide personnel with a foundation for understanding the basic operation of various types of DOE nuclear facility systems and equipment

  8. Classic ballet dancers postural patterns

    Directory of Open Access Journals (Sweden)

    Joseani Paulini Neves Simas

    2008-06-01

    Full Text Available The aim of this study was to evaluate classic ballet practice and its influence on postural patterns and (a identify the most frequent postural changes; (b determine the postural pattern; (c verify the existence of association of practice time and postural changes. The investigation was carried out in two stages: one, description in which 106 dancers participated; the other, causal comparative in which 50 dancers participated; and (a questionnaire; (b a checkerboard; (c postural chart; (d measure tape; (e camera and (f pedoscope were used as instrument. Descriptive and inferential statistics was used for analysis. The results revealed the most frequent postural changes such as hyperlordosis, unleveled shoulders and pronated ankles. Ballet seems to have negative implications in the postural development , affecting especially the vertebral spine, trunk and feet. The practice time was not a parameter to indicate the increase in postural changes. In conclusion, ballet may be associated with postural changes and determining a characteristic postural pattern.

  9. Classical scattering from oscillating targets

    Energy Technology Data Exchange (ETDEWEB)

    Papachristou, P.K.; Diakonos, F.K.; Constantoudis, V.; Schmelcher, P.; Benet, L

    2002-12-30

    We study planar classical scattering from an oscillating heavy target whose dynamics defines a five-dimensional phase space. Although the system possesses no periodic orbits, and thus topological chaos is not present, the scattering functions display a variety of structures on different time scales. These structures are due to scattering events with a strong energy transfer from the projectile to the moving disk resulting in low-velocity peaks. We encounter initial conditions for which the projectile exhibits infinitely many bounces with the oscillating disk. Our numerical investigations are supported by analytical results on a specific model with a simple time-law. The observed properties possess universal character for scattering off oscillating targets.

  10. Theoretical physics 1 classical mechanics

    CERN Document Server

    Nolting, Wolfgang

    2016-01-01

    This textbook offers a clear and comprehensive introduction to classical mechanics, one of the core components of undergraduate physics courses. The book starts with a thorough introduction to the mathematical tools needed, to make this textbook self-contained for learning. The second part of the book introduces the mechanics of the free mass point and details conservation principles. The third part expands the previous to mechanics of many particle systems. Finally the mechanics of the rigid body is illustrated with rotational forces, inertia and gyroscope movement. Ideally suited to undergraduate students in their first year, the book is enhanced throughout with learning features such as boxed inserts and chapter summaries, with key mathematical derivations highlighted to aid understanding. The text is supported by numerous worked examples and end of chapter problem sets. About the Theoretical Physics series Translated from the renowned and highly successful German editions, the eight volumes of this series...

  11. Inflation and classical scale invariance

    CERN Document Server

    Racioppi, Antonio

    2014-01-01

    BICEP2 measurement of primordial tensor modes in CMB suggests that cosmological inflation is due to a slowly rolling inflaton taking trans-Planckian values and provides further experimental evidence for the absence of large $M_{\\rm P}$ induced operators. We show that classical scale invariance solves the problem and allows for a remarkably simple scale-free inflaton model without any gauge group. Due to trans-Planckian inflaton values and VEVs, a dynamically induced Coleman-Weinberg-type inflaton potential of the model can predict tensor-to-scalar ratio $r$ in a large range. Precise determination of $r$ in future experiments will allow to test the proposed field-theoretic framework.

  12. Scientific Realism and Classical Physics

    CERN Document Server

    Singh, Virendra

    2008-01-01

    We recount the successful long career of classical physics, from Newton to Einstein, which was based on the philosophy of scientific realism. Special emphasis is given to the changing status and number of ontological entitities and arguments for their necessity at any time. Newton, initially, began with (i) point particles, (ii) aether, (iii) absolute space and (iv) absolute time. The electromagnetic theory of Maxwell and Faraday introduced `fields' as a new ontological entity not reducible to earlier ones. Their work also unified electricity, magnetism and optics. Repeated failure to observe the motion of earth through aether led Einstein to modify the Newtonian absolute space and time concepts to a fused Minkowski space-time and the removal of aether from basic ontological entities in his special theory of relativity. Later Einstein in his attempts to give a local theory of gravitation was led to further modify flat Minkowski space-time to the curved Riemannian space time. This reduced gravitational phenome...

  13. Hydrogen: Beyond the Classic Approximation

    International Nuclear Information System (INIS)

    The classical nucleus approximation is the most frequently used approach for the resolution of problems in condensed matter physics.However, there are systems in nature where it is necessary to introduce the nuclear degrees of freedom to obtain a correct description of the properties.Examples of this, are the systems with containing hydrogen.In this work, we have studied the resolution of the quantum nuclear problem for the particular case of the water molecule.The Hartree approximation has been used, i.e. we have considered that the nuclei are distinguishable particles.In addition, we have proposed a model to solve the tunneling process, which involves the resolution of the nuclear problem for configurations of the system away from its equilibrium position

  14. Classical electromagnetism in a nutshell

    CERN Document Server

    Garg, Anupam

    2012-01-01

    This graduate-level physics textbook provides a comprehensive treatment of the basic principles and phenomena of classical electromagnetism. While many electromagnetism texts use the subject to teach mathematical methods of physics, here the emphasis is on the physical ideas themselves. Anupam Garg distinguishes between electromagnetism in vacuum and that in material media, stressing that the core physical questions are different for each. In vacuum, the focus is on the fundamental content of electromagnetic laws, symmetries, conservation laws, and the implications for phenomena such as radiation and light. In material media, the focus is on understanding the response of the media to imposed fields, the attendant constitutive relations, and the phenomena encountered in different types of media such as dielectrics, ferromagnets, and conductors. The text includes applications to many topical subjects, such as magnetic levitation, plasmas, laser beams, and synchrotrons.

  15. From classical to quantum fields

    CERN Document Server

    Baulieu, Laurent; Sénéor, Roland

    2017-01-01

    Quantum Field Theory has become the universal language of most modern theoretical physics. This introductory textbook shows how this beautiful theory offers the correct mathematical framework to describe and understand the fundamental interactions of elementary particles. The book begins with a brief reminder of basic classical field theories, electrodynamics and general relativity, as well as their symmetry properties, and proceeds with the principles of quantisation following Feynman's path integral approach. Special care is used at every step to illustrate the correct mathematical formulation of the underlying assumptions. Gauge theories and the problems encountered in their quantisation are discussed in detail. The last chapters contain a full description of the Standard Model of particle physics and the attempts to go beyond it, such as grand unified theories and supersymmetry. Written for advanced undergraduate and beginning graduate students in physics and mathematics, the book could also serve as a re...

  16. Classical Cosmology Through Animation Stories

    Science.gov (United States)

    Mijic, Milan; Kang, E. Y. E.; Longson, T.; State LA SciVi Project, Cal

    2010-05-01

    Computer animations are a powerful tool for explanation and communication of ideas, especially to a younger generation. Our team completed a three part sequence of short, computer animated stories about the insight and discoveries that lead to the understanding of the overall structure of the universe. Our principal characters are Immanuel Kant, Henrietta Leavitt, and Edwin Hubble. We utilized animations to model and visualize the physical concepts behind each discovery and to recreate the characters, locations, and flavor of the time. The animations vary in length from 6 to 11 minutes. The instructors or presenters may wish to utilize them separately or together. The animations may be used for learning classical cosmology in a visual way in GE astronomy courses, in pre-college science classes, or in public science education setting.

  17. A course in classical physics

    CERN Document Server

    Bettini, Alessandro

    2016-01-01

    This first volume covers the mechanics of point particles, gravitation, extended systems (starting from the two-body system), the basic concepts of relativistic mechanics and the mechanics of rigid bodies and fluids. The four-volume textbook, which covers electromagnetism, mechanics, fluids and thermodynamics, and waves and light, is designed to reflect the typical syllabus during the first two years of a calculus-based university physics program. Throughout all four volumes, particular attention is paid to in-depth clarification of conceptual aspects, and to this end the historical roots of the principal concepts are traced. Writings by the founders of classical mechanics, G. Galilei and I. Newton, are reproduced, encouraging students to consult them. Emphasis is also consistently placed on the experimental basis of the concepts, highlighting the experimental nature of physics. Whenever feasible at the elementary level, concepts relevant to more advanced courses in modern physics are included. Each chapter b...

  18. Hilbert space theory of classical electrodynamics

    Indian Academy of Sciences (India)

    RAJAGOPAL A K; GHOSE PARTHA

    2016-06-01

    Classical electrodynamics is reformulated in terms of wave functions in the classical phase space of electrodynamics, following the Koopman–von Neumann–Sudarshan prescription for classical mechanics on Hilbert spaces sans the superselection rule which prohibits interference effects in classical mechanics. This is accomplished by transforming from a set of commutingobservables in one Hilbert space to another set of commuting observables in a larger Hilbert space. This is necessary to clarify the theoretical basis of the much recent work on quantum-like features exhibited by classical optics. Furthermore, following Bondar et al, {\\it Phys. Rev.} A 88, 052108 (2013), it is pointed out that quantum processes that preserve the positivity or nonpositivity of theWigner function can be implemented by classical optics. This may be useful in interpreting quantum information processing in terms of classical optics.

  19. Relaxation properties in classical diamagnetism

    Science.gov (United States)

    Carati, A.; Benfenati, F.; Galgani, L.

    2011-06-01

    It is an old result of Bohr that, according to classical statistical mechanics, at equilibrium a system of electrons in a static magnetic field presents no magnetization. Thus a magnetization can occur only in an out of equilibrium state, such as that produced through the Foucault currents when a magnetic field is switched on. It was suggested by Bohr that, after the establishment of such a nonequilibrium state, the system of electrons would quickly relax back to equilibrium. In the present paper, we study numerically the relaxation to equilibrium in a modified Bohr model, which is mathematically equivalent to a billiard with obstacles, immersed in a magnetic field that is adiabatically switched on. We show that it is not guaranteed that equilibrium is attained within the typical time scales of microscopic dynamics. Depending on the values of the parameters, one has a relaxation either to equilibrium or to a diamagnetic (presumably metastable) state. The analogy with the relaxation properties in the Fermi Pasta Ulam problem is also pointed out.

  20. Classical universes are perfectly predictable!

    Science.gov (United States)

    Schmidt, Jan Hendrik

    I argue that in a classical universe, all the events that ever happen are encoded in each of the universe's parts. This conflicts with a statement which is widely believed to lie at the basis of relativity theory: that the events in a space-time region R determine only the events in R's domain of dependence but not those in other space-time regions. I show how, from this understanding, a new prediction method (which I call the 'Smoothness Method') can be obtained which allows us to predict future events on the basis of local observational data. Like traditional prediction methods, this method makes use of so-called ' ceteris paribus clauses', i.e. assumptions about the unobserved parts of the universe. However, these assumptions are used in a way which enables us to predict the behaviour of open systems with arbitrary accuracy, regardless of the influence of their environment-which has not been achieved by traditional methods. In a sequel to this paper (Schmidt, 1998), I will prove the Uniqueness and Predictability Theorems on which the Smoothness Method is based, and comment in more detail on its mathematical properties.

  1. Pembrolizumab in classical Hodgkin's lymphoma.

    Science.gov (United States)

    Maly, Joseph; Alinari, Lapo

    2016-09-01

    Pembrolizumab is a humanized monoclonal antibody directed against programmed cell death protein 1 (PD-1), a key immune-inhibitory molecule expressed on T cells and implicated in CD4+ T-cell exhaustion and tumor immune-escape mechanisms. Classical Hodgkin's lymphoma (cHL) is a unique B-cell malignancy in the sense that malignant Reed-Sternberg (RS) cells represent a small percentage of cells within an extensive immune cell infiltrate. PD-1 ligands are upregulated on RS cells as a consequence of both chromosome 9p24.1 amplification and Epstein-Barr virus infection and by interacting with PD-1 promote an immune-suppressive effect. By augmenting antitumor immune response, pembrolizumab and nivolumab, another monoclonal antibody against PD-1, have shown significant activity in patients with relapsed/refractory cHL as well as an acceptable toxicity profile with immune-related adverse events that are generally manageable. In this review, we explore the rationale for targeting PD-1 in cHL, review the clinical trial results supporting the use of checkpoint inhibitors in this disease, and present future directions for investigation in which this approach may be used.

  2. Rebrightening Phenomenon in Classical Novae

    CERN Document Server

    Kato, Taichi; Maehara, Hiroyuki; Kiyota, Seiichiro

    2009-01-01

    Two classical novae V1493 Aql and V2362 Cyg were known to exhibit unprecedented large-amplitude rebrightening during the late stage of their evolution. We analyzed common properties in these two light curves. We show that these unusual light curves are very well expressed by a combination of power-law decline, omnipresent in fast novae, and exponential brightening. We propose a schematic interpretation of the properties common to these rebrightenings can be a consequence of a shock resulting from a secondary ejection and its breakout in the optically thick nova winds. This interpretation has an advantage in explaining the rapid fading following the rebrightening and the subsequent evolution of the light curve. The exponential rise might reflect emerging light from the shock front, analogous to a radiative precursor in a supernova shock breakout. The consequence of such a shock in the nova wind potentially explains many kinds of unusual phenomena in novae including early-stage variations and potentially dust f...

  3. Locking classical correlation in quantum states

    CERN Document Server

    Di Vincenzo, D P; Leung, D; Smolin, J A; Terhal, B M; Vincenzo, David Di; Horodecki, Michal; Leung, Debbie; Smolin, John; Terhal, Barbara

    2003-01-01

    We show that there exist bipartite quantum states which contain large hidden classical correlation that can be unlocked by a disproportionately small amount of classical communication. In particular, there are $(2n+1)$-qubit states for which a one bit message doubles the optimal classical mutual information between measurement results on the subsystems, from $n/2$ bits to $n$ bits. States exhibiting this behavior need not be entangled. We study the range of states exhibiting this phenomenon and bound its magnitude.

  4. A Drosophila melanogaster model of classic galactosemia

    OpenAIRE

    Kushner, Rebekah F.; Ryan, Emily L.; Sefton, Jennifer M. I.; Rebecca D Sanders; Lucioni, Patricia Jumbo; Kenneth H Moberg; Fridovich-Keil, Judith L.

    2010-01-01

    Classic galactosemia is a potentially lethal disorder that results from profound impairment of galactose-1-phosphate uridylyltransferase (GALT). Despite decades of research, the underlying pathophysiology of classic galactosemia remains unclear, in part owing to the lack of an appropriate animal model. Here, we report the establishment of a Drosophila melanogaster model of classic galactosemia; this is the first whole-animal genetic model to mimic aspects of the patient phenotype. Analogous t...

  5. Classical Underpinnings of Gravitationally Induced Quantum Interference

    CERN Document Server

    Mannheim, P D

    1996-01-01

    We show that the gravitational modification of the phase of a neutron beam (the COW experiment) has a classical origin, being due to the time delay which classical particles experience in traversing a background gravitational field. Similarly, we show that classical light waves also undergo a phase shift in traversing a gravitational field. We show that the COW experiment respects the equivalence principle even in the presence of quantum mechanics.

  6. Delayed Choice Between Purely Classical States

    OpenAIRE

    Jason A. C. Gallas

    2006-01-01

    It is argued that Wheeler's insightful idea of delayed choice experiments may be explored at a classical level, arising naturally from number-theoretical conjugacies always necessarily present in the equations of motion. For simple and representative systems, we illustrate how to cast the equations of motion in a form encoding all classical states simultaneously through a ``state parameter''. By suitably selecting the parameter one may project the system into any desired classical state.

  7. The relation between classical and quantum electrodynamics

    OpenAIRE

    Mario Bacelar Valente

    2012-01-01

    Quantum electrodynamics presents intrinsic limitations in the description of physical processes that make it impossible to recover from it the type of description we have in classical electrodynamics. Hence one cannot consider classical electrodynamics as reducing to quantum electrodynamics and being recovered from it by some sort of limiting procedure. Quantum electrodynamics has to be seen not as an more fundamental theory, but as an upgrade of classical electrodynamics, which permits an ex...

  8. On the tomographic description of classical fields

    International Nuclear Information System (INIS)

    After a general description of the tomographic picture for classical systems, a tomographic description of free classical scalar fields is proposed both in a finite cavity and the continuum. The tomographic description is constructed in analogy with the classical tomographic picture of an ensemble of harmonic oscillators. The tomograms of a number of relevant states such as the canonical distribution, the classical counterpart of quantum coherent states and a new family of so-called Gauss–Laguerre states, are discussed. Finally the Liouville equation for field states is described in the tomographic picture offering an alternative description of the dynamics of the system that can be extended naturally to other fields.

  9. On the tomographic description of classical fields

    Energy Technology Data Exchange (ETDEWEB)

    Ibort, A., E-mail: albertoi@math.uc3m.es [Departamento de Matemáticas, Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911 Leganés, Madrid (Spain); López-Yela, A., E-mail: alyela@math.uc3m.es [Departamento de Matemáticas, Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911 Leganés, Madrid (Spain); Man' ko, V.I., E-mail: manko@na.infn.it [P.N. Lebedev Physical Institute, Leninskii Prospect 53, Moscow 119991 (Russian Federation); Marmo, G., E-mail: marmo@na.infn.it [Dipartimento di Scienze Fisiche dell' Università “Federico II” e Sezione INFN di Napoli, Complesso Universitario di Monte S. Angelo, via Cintia, 80126 Naples (Italy); Simoni, A., E-mail: simoni@na.infn.it [Dipartimento di Scienze Fisiche dell' Università “Federico II” e Sezione INFN di Napoli, Complesso Universitario di Monte S. Angelo, via Cintia, 80126 Naples (Italy); Sudarshan, E.C.G., E-mail: bhamathig@gmail.com [Physics Department, Center for Particle Physics, University of Texas, Austin, TX 78712 (United States); Ventriglia, F., E-mail: ventriglia@na.infn.it [Dipartimento di Scienze Fisiche dell' Università “Federico II” e Sezione INFN di Napoli, Complesso Universitario di Monte S. Angelo, via Cintia, 80126 Naples (Italy)

    2012-03-26

    After a general description of the tomographic picture for classical systems, a tomographic description of free classical scalar fields is proposed both in a finite cavity and the continuum. The tomographic description is constructed in analogy with the classical tomographic picture of an ensemble of harmonic oscillators. The tomograms of a number of relevant states such as the canonical distribution, the classical counterpart of quantum coherent states and a new family of so-called Gauss–Laguerre states, are discussed. Finally the Liouville equation for field states is described in the tomographic picture offering an alternative description of the dynamics of the system that can be extended naturally to other fields.

  10. On the tomographic description of classical fields

    CERN Document Server

    Ibort, A; Man'ko, V I; Marmo, G; Simoni, A; Sudarshan, E C G; Ventriglia, F

    2012-01-01

    After a general description of the tomographic picture for classical systems, a tomographic description of free classical scalar fields is proposed both in a finite cavity and the continuum. The tomographic description is constructed in analogy with the classical tomographic picture of an ensemble of harmonic oscillators. The tomograms of a number of relevant states such as the canonical distribution, the classical counterpart of quantum coherent states and a new family of so called Gauss--Laguerre states, are discussed. Finally the Liouville equation for field states is described in the tomographic picture offering an alternative description of the dynamics of the system that can be extended naturally to other fields.

  11. Primary Mediastinal Classical Hodgkin Lymphoma.

    Science.gov (United States)

    Piña-Oviedo, Sergio; Moran, Cesar A

    2016-09-01

    Primary mediastinal Classical Hodgkin lymphoma (CHL) is rare. Nodular sclerosis CHL (NS-CHL) is the most common subtype involving the anterior mediastinum and/or mediastinal lymph nodes. Primary thymic CHL is exceedingly rare. The disease typically affects young women and is asymptomatic in 30% to 50% of patients. Common symptoms include fatigue, chest pain, dyspnea and cough, but vary depending on the location and size of the tumor. B-symptoms develop in 30% of cases. By imaging, primary mediastinal CHL presents as mediastinal widening/mediastinal mass that does not invade adjacent organs but may compress vital structures as bulky disease. Histopathology is the gold standard for diagnosis. Primary mediastinal NS-CHL consists of nodules of polymorphous inflammatory cells surrounded by broad fibrous bands extending from a thickened lymph node capsule. The cellular nodules contain variable numbers of large Hodgkin/Reed-Sternberg cells, required for diagnosis. Primary thymic CHL may exhibit prominent cystic changes. The histopathologic recognition of NS-CHL can be challenging in cases with prominent fibrosis, scant cellularity, artifactual cell distortion, or an exuberant granulomatous reaction. The differential diagnosis includes primary mediastinal non-HLs, mediastinal germ cell tumors, thymoma, and metastatic carcinoma or melanoma to the mediastinum. Distinction from primary mediastinal non-HLs is crucial for adequate therapeutic decisions. Approximately 95% of patients with primary mediastinal CHL will be alive and free of disease at 10 years after treatment with short courses of combined chemoradiotherapy. In this review, we discuss the history, classification, epidemiology, clinicoradiologic features, histopathology, immunohistochemistry, differential diagnosis, and treatment of primary mediastinal CHL. PMID:27441757

  12. Prevalence of classical swine fever virus in domestic pigs in South Korea: 1999-2011.

    Science.gov (United States)

    Song, J-Y; Lim, S I; Jeoung, H Y; Choi, E-J; Hyun, B-H; Kim, B; Kim, J; Shin, Y-K; Dela Pena, R C; Kim, J B; Joo, H; An, D J

    2013-12-01

    The major policy for eradication of classical swine fever (CSF) in South Korea has focused on the implementation of compulsory vaccination of the susceptible pig population. A vaccine strain of CSF virus, the LOM strain, is used to maintain high herd seroconversion, a practice complementary to the 'stamping-out policy' and restriction of animal movement during disease outbreaks. To survey for the prevalence of CSF in domestic pigs in South Korea over the past 13 years (1999-2011), we tested 4 193 782 and 1 162 645 samples for antibodies and antigens, respectively. Whereas seropositivity for CSF antibodies has been maintained at over 95% in the mainland, in Jeju Island, where no-vaccination has been administered since 1999, seroprevalence has been below 1% during the last 3 years of study (2009-2011). The highest number of outbreaks in South Korea occurred in 2002 and 2003; since then, outbreaks have decreased each year, with the last CSF outbreak recorded in 2009. No outbreaks have occurred during the past 3 years, and a high level of herd immunity has been maintained in the mainland pig population for 8 years; therefore, South Korea could now switch to a no-vaccination policy throughout the country. However, the constant threat of the re-emergence of the disease in the susceptible pig population should be the main consideration in planning and carrying out the last phase of the CSF eradication process.

  13. Cracking and interfacial debonding of the Al–Si coating in hot stamping of pre-coated boron steel

    Energy Technology Data Exchange (ETDEWEB)

    Gui, Zhong-Xiang; Wang, Kai; Zhang, Yi-Sheng [College of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074 (China); State Key Laboratory of Materials Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074 (China); Zhu, Bin, E-mail: zhubin26@gmail.com [College of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074 (China); State Key Laboratory of Materials Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan 430074 (China)

    2014-10-15

    Highlights: • Cracking failure of the Al–Si coating in hot stamping process was investigated. • Microcracks initiated inside the coating during the austenitization. • Microcrack initiation in the hot deformation correlated to the Fe–Al intermetallics. • Macrocracks extended along the Mode I path led to the coating break into segments. • Macrocracks growth followed Mode II path resulted in the interfacial debonding. - Abstract: This study is focused on the mechanisms of cracks initiation, propagation and interfacial debonding of the Al–Si coating in hot stamping of the pre-coated boron steel. The investigation was performed isothermally at three deformation temperatures (700, 750, 800 °C) at a strain rate of 0.1/s. Cracking and interfacial debonding of the coating were observed with optical and scanning electron microscope, to reveal the damage evolution under applied tensile strains. Microstructures and phase inside the coating before and after austenitization were determined by energy dispersive spectroscopy and X-ray diffraction. The results indicate that austenitization led to micro-cracks and Kirkendall voids initiation inside the Al–Si coating because of thermal loading, and the cracks were arrested by α-Fe diffusion layer. When the coating on substrate system was submitted to the uniaxial tensile test, the surface coating exhibited multiple cracking normal to the tensile direction. The Kirkendall voids seemed to promote the macro-crack growth through the diffusion layer. The macro-cracks followed a Mode I path, leading to the coating deteriorates to cracked segments. The macro-cracks then continued to propagate following a Mode II path that along the diffusion layer/substrate interface because of shear stress transferred from the deformed substrate, resulting in the interfacial debonding of the coating segments. The crack density firstly increased with the increasing tensile strain and then reached saturation. Decreasing deformation

  14. The Thermonuclear Runaway and the Classical Nova Outburst

    CERN Document Server

    Starrfield, S; Hix, W R

    2016-01-01

    Nova explosions occur on the white dwarf component of a Cataclysmic Variable binary stellar system that is accreting matter lost by its companion. When sufficient material has been accreted by the white dwarf, a thermonuclear runaway occurs and ejects material in what is observed as a Classical Nova explosion. We describe both the recent advances in our understanding of the progress of the outburst and outline some of the puzzles that are still outstanding. We report on the effects of improving both the nuclear reaction rate library and including a modern nuclear reaction network in our one-dimensional, fully implicit, hydrodynamic computer code. In addition, there has been progress in observational studies of Supernovae Ia with implications about the progenitors and we discuss that in this review.

  15. The Thermonuclear Runaway and the Classical Nova Outburst

    Science.gov (United States)

    Starrfield, S.; Iliadis, C.; Hix, W. R.

    2016-05-01

    Nova explosions occur on the white dwarf component of a cataclysmic variable binary stellar system that is accreting matter lost by its companion. When sufficient material has been accreted by the white dwarf, a thermonuclear runaway occurs and ejects material in what is observed as a classical nova explosion. We describe both the recent advances in our understanding of the progress of the outburst and outline some of the puzzles that are still outstanding. We report on the effects of improving both the nuclear reaction rate library and including a modern nuclear reaction network in our one-dimensional, fully implicit, hydrodynamic computer code. In addition, there has been progress in observational studies of supernovae Ia with implications about the progenitors, and we discuss that in this review.

  16. Resource Distribution of Agaricus in the World of Stamps%邮票中的蘑菇属种类及其分布

    Institute of Scientific and Technical Information of China (English)

    曾辉

    2011-01-01

    Through collecting and counting mushroom stamps worldwide,126 pieces stamps of Agaricus,covering 24 species,were found to have been issued in 76 countries or regions until 2010.The resource distribution and cultivation of Agaricus in the world were preliminarily discussed.%截至2010年,通过对全世界范围蘑菇邮票的收集和统计得知,世界上76个国家和地区共发行了蘑菇属24个种计126枚邮票,从中大致了解世界范围上蘑菇属真菌的资源分布和栽培状况。

  17. Stamping Out Rubber-Stamp Collegiality

    Science.gov (United States)

    Bugeja, Michael J.

    2012-01-01

    In the past year, public colleges and universities across the country have been shrinking degree programs and terminating personnel--including tenured professors--in an effort to cope with budget cuts in higher education. The situation is not confined to a handful of mismanaged public institutions, as in the past. It is a national phenomenon and…

  18. Progress Report

    DEFF Research Database (Denmark)

    Duer, Karsten

    1999-01-01

    Progress report describing the work carried out by the Danish participant in the ALTSET project in the period January 1999 to July 1999.......Progress report describing the work carried out by the Danish participant in the ALTSET project in the period January 1999 to July 1999....

  19. BANKRUPTCY RULES AND PROGRESSIVE TAXATION

    OpenAIRE

    Juan de Dios Moreno Ternero; Antonio Villar Notario

    2002-01-01

    This paper explores the relative progressivity of the main bankruptcy rules in taxation problems. A rule F is more progressive than a rule G when the after-tax income vector generated by F Lorenz dominates that generated by G. We focus our analysis on four classical rules (proportional, equal-awards, equal-losses and Talmud) and on the TAL-family, introduced in Moreno-Ternero & Villar (2002). This family depends on a parameter Theta belongs to [0,1] and encompasses the constrained equal award...

  20. Emergent Gravity Paradigm: Recent Progress

    CERN Document Server

    Padmanabhan, T

    2014-01-01

    Research during the last one decade or so suggests that the gravitational field equations in a large class of theories (including, but not limited to, general relativity) have the same status as the equations of, say, gas dynamics or elasticity. This paradigm provides a refreshingly different way of interpreting spacetime dynamics and highlights the fact that several features of classical gravitational theories have direct thermodynamic interpretation. I review the recent progress in this approach, achieved during the last few years.

  1. On the interaction mechanisms between atmospheric sources of hydrogen and Al-Si coated or bare high strength steels during the hot stamping process

    OpenAIRE

    Mandy, Mélodie; Georges, Cédric; Drillet, Pascal; Sturel, Thierry; Jacques, Pascal; SF2M - workshop "Mapping the future of materials science"

    2015-01-01

    The economic and ecological challenges of the automotive industry coupled to safety considerations involve lightweight design based on the development of new ultra high strength materials. The hot stamping process of Al-Si coated steels ensures these strength levels and, moreover, allows an easy forming of the material without the necessity of a controlled atmosphere. At high temperatures, the coating is hydrogen-permeable, while at low temperatures (below 120°C), it becomes tight to hydrogen...

  2. PENGUKURAN NILAI OVERALL EQUIPMENT EFFECTIVENESS SEBAGAI DASAR USAHA PERBAIKAN PROSES MANUFAKTUR PADA LINI PRODUKSI (Studi Kasus pada Stamping Production Division Sebuah Industri Otomotif)

    OpenAIRE

    Robby Suhendra; Betrianis Betrianis

    2005-01-01

    Overall Equipment Effectiveness (OEE) is an effectiveness measurement method of equipment utilization in the implementation of Total Productive Maintenance (TPM. The ability of identification in details toward main problem and the cause factors that makes the improvement efforts become more focused is the reason why this method applied comprehensively by all manufacturing companies around the world. Manufacturing process at Stamping Production Division an automotive isdustry still keeps some ...

  3. 影响冲模寿命的因素及改善措施%The Factors of Affecting Stamping Die Service Life and its Improvement Measures

    Institute of Scientific and Technical Information of China (English)

    刘冰玉; 侯建朝

    2012-01-01

    Analyzed the tactors of affecting stamping die service life, put forward some preventive measures, it has a certain reference to improve die service life.%分析了影响冲模寿命的各种因素,提出一些预防应对措施,对提高冲模寿命具有一定的参考和借鉴作用。

  4. New Materials and New Technology in Automotive Stamping Field%汽车冲压领域的新材料及新工艺

    Institute of Scientific and Technical Information of China (English)

    汪文奇

    2012-01-01

    Introduced the application of new materials & new technology in automotive body production of automotive stamping field, and analyzed technical bottleneck of several kinds of new materials & new technology application.%介绍了汽车冲压领域的新材料、新工艺在汽车车身中的应用情况,并分析了几类新材料、新工艺应用的技术瓶颈。

  5. Incentives and Barriers to Participation in Community Nutrition Education Programs for Recipients of Food Stamps and Temporary Assistance to Needy Families

    OpenAIRE

    McFerren, Mary Margaret

    2007-01-01

    Mary McFerren's Abstract The purpose of this study was to explore the incentives and barriers perceived by low-income women of child-bearing age related to their participation in nutrition education programs. The specific programs of concern in this study are the Expanded Food and Nutrition Education Program (EFNEP) and the Food Stamp Nutrition Education (FSNE) program. This qualitative study sought to hear the voices of the women so that nutrition programs can be ...

  6. Design of Safety Protection Device for Stamping Die%冲压模安全保护装置的结构设计

    Institute of Scientific and Technical Information of China (English)

    田晓峰

    2012-01-01

    介绍了合理设计冲压模安全保护装置的结构,提高了其灵活性、有效性,真正地保护操作者的人身安全。%This paper introduced rational design of stamping die safety protection device mechanism.Improve its flexibility,validity,to protect the personal safety of the operator.

  7. A New Method For Advanced Virtual Design Of Stamping Tools For Automotive Industry: Application To Nodular Cast Iron EN-GJS-600-3

    Science.gov (United States)

    Ben-Slima, Khalil; Penazzi, Luc; Mabru, Catherine; Ronde-Oustau, François; Rezaï-Aria, Farhad

    2011-05-01

    This contribution presents an approach combining the stamping numerical processing simulations and structure analysis in order to improve the design for optimizing the tool fatigue life. The method consists in simulating the stamping process via AutoForm® (or any FEM Code) by considering the tool as a perfect rigid body. The estimated contact pressure is then used as boundary condition for FEM structure loading analysis. The result of this analysis is used for life prediction of the tool using S-N fatigue curve. If the prescribed tool life requirements are not satisfied, then the critical region of the tool is redesigned and the whole simulation procedures are reactivated. This optimization method is applied for a cast iron EN-GJS-600-3 as candidate stamping tool materiel. The room temperature fatigue S-N curves of this alloy are established in laboratory under uniaxial push/pull cyclic experiments on cylindrical specimens under a load ratio of R (σmin/σmax) = -2.

  8. Classical Hamiltonian Dynamics and Lie Group Algebras

    CERN Document Server

    Aycock, B; Silverberg, J L; Widom, A

    2008-01-01

    The classical Hamilton equations of motion yield a structure sufficiently general to handle an almost arbitrary set of ordinary differential equations. Employing elementary algebraic methods, it is possible within the Hamiltonian structure to describe many physical systems exhibiting Lie group symmetries. Elementary examples include magnetic moment precession and the mechanical orbits of color charged particles in classical non-abelian chromodynamics.

  9. Classical data compression with quantum side information

    OpenAIRE

    Devetak, I.; Winter, A.

    2002-01-01

    The problem of classical data compression when the decoder has quantum side information at his disposal is considered. This is a quantum generalization of the classical Slepian-Wolf theorem. The optimal compression rate is found to be reduced from the Shannon entropy of the source by the Holevo information between the source and side information.

  10. On entanglement-assisted classical capacity

    Science.gov (United States)

    Holevo, A. S.

    2002-09-01

    We give a modified proof of the recent result of C. H. Bennett, P. W. Shor, J. A. Smolin, and A. V. Thapliyal concerning entanglement-assisted classical capacity of a quantum channel and discuss the relation between entanglement-assisted and unassisted classical capacities.

  11. Classical Conditioning: Eliciting the Right Response.

    Science.gov (United States)

    Tauber, Robert T.

    1990-01-01

    Classical conditioning is responsible for students' positive and negative feelings, whether directed toward subject matter, peers, teachers, or education in general. This article explains how educators can use classical conditioning principles (such as reinforcement, extinction, and paired stimuli) to create an anxiety-free learning environment.…

  12. The Dance of Spain: Classical Folkloric Flamenco.

    Science.gov (United States)

    Gallant, Clifford J.

    A text on the classical and folk dance of Spain includes a pretest, provided in both English and Spanish; text about the dance in general and the dance of Spain, both classical and folkloric; tests on the text, in both English and Spanish; more specific readings about the traditions of flamenco, castanets, and "el jaleo"; a glossary of flamenco…

  13. Three Approaches to Classical Thermal Field Theory

    OpenAIRE

    Gozzi, E.; Penco, R.

    2010-01-01

    In this paper we study three different functional approaches to classical thermal field theory, which turn out to be the classical counterparts of three well-known different formulations of quantum thermal field theory: the Closed-Time Path (CTP) formalism, the Thermofield Dynamics (TFD) and the Matsubara approach.

  14. Three approaches to classical thermal field theory

    Science.gov (United States)

    Gozzi, E.; Penco, R.

    2011-04-01

    In this paper we study three different functional approaches to classical thermal field theory, which turn out to be the classical counterparts of three well-known different formulations of quantum thermal field theory: the closed-time path (CTP) formalism, the thermofield dynamics (TFD) and the Matsubara approach.

  15. Modal analysis of a classical guitar

    Science.gov (United States)

    Cohen, David; Rossing, Thomas D.

    2002-11-01

    Using holographic interferometry, we have determined the modes of vibration of a classical guitar (by the first author) having an asymmetrically-braced top plate and a crossed braced back of unique design. The vibrational modes and acoustical properties are compared with other classical guitars.

  16. Classic and Hard-Boiled Detective Fiction.

    Science.gov (United States)

    Reilly, John M.

    Through an analysis of several stories, this paper defines the similarities and differences between classic and hard-boiled detective fiction. The characters and plots of three stories are discussed: "The Red House" by A. A. Milne; "I, The Jury" by Mickey Spillane; and "League of Frightened Men" by Rex Stout. The classic detective story is defined…

  17. Classical decoherence in a nanomechanical resonator

    Science.gov (United States)

    Maillet, O.; Vavrek, F.; Fefferman, A. D.; Bourgeois, O.; Collin, E.

    2016-07-01

    Decoherence is an essential mechanism that defines the boundary between classical and quantum behaviours, while imposing technological bounds for quantum devices. Little is known about quantum coherence of mechanical systems, as opposed to electromagnetic degrees of freedom. But decoherence can also be thought of in a purely classical context, as the loss of phase coherence in the classical phase space. Indeed the bridge between quantum and classical physics is under intense investigation, using, in particular, classical nanomechanical analogues of quantum phenomena. In the present work, by separating pure dephasing from dissipation, we quantitatively model the classical decoherence of a mechanical resonator: through the experimental control of frequency fluctuations, we engineer artificial dephasing. Building on the fruitful analogy introduced between spins/quantum bits and nanomechanical modes, we report on the methods available to define pure dephasing in these systems, while demonstrating the intrinsic almost-ideal properties of silicon nitride beams. These experimental and theoretical results, at the boundary between classical nanomechanics and quantum information fields, are prerequisite in the understanding of decoherence processes in mechanical devices, both classical and quantum.

  18. Classical and Quantum-Mechanical State Reconstruction

    Science.gov (United States)

    Khanna, F. C.; Mello, P. A.; Revzen, M.

    2012-01-01

    The aim of this paper is to present the subject of state reconstruction in classical and in quantum physics, a subject that deals with the experimentally acquired information that allows the determination of the physical state of a system. Our first purpose is to explain a method for retrieving a classical state in phase space, similar to that…

  19. Introducing quantum effects in classical theories

    CERN Document Server

    Fabris, J C; Rodrigues, D C; Daouda, M H

    2015-01-01

    In this paper, we explore two different ways of implementing quantum effects in a classical structure. The first one is through an external field. The other one is modifying the classical conservation laws. In both cases, the consequences for the description of the evolution of the universe are discussed.

  20. Classical transport in disordered systems

    Science.gov (United States)

    Papaioannou, Antonios

    This thesis reports on the manifestation of structural disorder on molecular transport and it consists of two parts. Part I discusses the relations between classical transport and the underlying structural complexity of the system. Both types of molecular diffusion, namely Gaussian and non- Gaussian are presented and the relevant time regimes are discussed. In addition the concept of structural universality is introduced and connected with the diffusion metrics. One of the most robust techniques for measuring molecular mean square displacements is magnetic resonance. This method requires encoding and subsequently reading out after an experimentally controlled time, a phase φ to the spins using magnetic field gradients. The main limitation for probing short diffusion lengths L(t) ˜ 1micro m with magnetic resonance is the requirement to encode and decode the phase φ in very short time intervals. Therefore, to probe such displacements a special probe was developed equipped with a gradient coil capable of delivering magnetic field gradients of approximately 90 G/cmA . The design of the probe is reported. Part I also includes a discussion of experiments of transport in two qualitatively different disordered phantoms and reports on a direct observation of universality in one-dimension. The results reveal the universal power law scaling of the diffusion coefficient at the long-time regime and illustrate the essence of structural universality by experimentally determining the structure correlation function of the phantoms. In addition, the scaling of the diffusive permeability of the phantoms with respect to the pore size is investigated. Additional work presented includes a detailed study of adsorption of methane gas in Vycor disordered glass. The techniques described in Part I of this thesis are widely used for measuring structural parameters of porous media, such as the surface-to-volume ratio or diffusive permeability. Part II of this thesis discusses the

  1. Emergence of classical theories from quantum mechanics

    CERN Document Server

    Hajicek, Petr

    2012-01-01

    Three problems stand in the way of deriving classical theories from quantum mechanics: those of realist interpretation, of classical properties and of quantum measurement. Recently, we have identified some tacit assumptions that lie at the roots of these problems. Thus, a realist interpretation is hindered by the assumption that the only properties of quantum systems are values of observables. If one simply postulates the properties to be objective that are uniquely defined by preparation then all difficulties disappear. As for classical properties, the wrong assumption is that there are arbitrarily sharp classical trajectories. It turns out that fuzzy classical trajectories can be obtained from quantum mechanics by taking the limit of high entropy. Finally, standard quantum mechanics implies that any registration on a quantum system is disturbed by all quantum systems of the same kind existing somewhere in the universe. If one works out systematically how quantum mechanics must be corrected so that there is ...

  2. Development of low-friction and wear-resistant surfaces for low-cost Al hot stamping tools

    Directory of Open Access Journals (Sweden)

    Dong Y.

    2015-01-01

    Full Text Available In this study, advanced surfaces and coatings have been developed using plasma thermochemical treatment, PVD coating, electroless Ni-BN plating and duplex surface engineering to produce low-friction and wear-resistant surfaces for cast iron stamping tools. Their microstructural and nano-mechanical properties were systematically analysed and the tribological behaviour of these new surfaces and coatings were evaluated. The experimental results have shown that under dry sliding condition, the tribological behaviour of aluminium differed great from that of steel regardless of the counterpart material. Highly reactive aluminium had a strong tendency to solder with tool surfaces during dry sliding. However, the lubricity of gray cast irons can be significantly improved by Ni-BN and DLC coatings. The coefficient of friction reduced from about 0.5 for untreated cast irons to about 0.2 sliding against aluminium. Duplex treatment combining plasma nitrocarburising with low-friction coatings showed superior durability than both DLC and Ni-BN coatings.

  3. ABC di corpi: alcuni alfabeti figurati del XVI secolo del Gabinetto Disegni e Stampe della Pinacoteca Nazionale di Bologna

    Directory of Open Access Journals (Sweden)

    Valeria Butera

    2013-10-01

    Full Text Available Fra le diverse tipologie di motivi ornamentali, gli alfabeti figurati costituiscono un vero e proprio genere a se stante, che attinge al repertorio iconografico del proprio tempo e lo riflette in composizioni dotate di grande fascino e originalità. Per la quantità, la qualità e l’eterogeneità degli esemplari custoditi, il Gabinetto Disegni e Stampe della Pinacoteca Nazionale di Bologna costituisce un caso più unico che raro in Italia, vantando alfabeti figurati che abbracciano ampi confini geografici e cronologici, spaziando dal tardo gotico al XIX secolo. Dopo una breve introduzione sulle vicende collezionistiche di un nucleo grafico così insolito e particolare, l’articolo si concentra su alcuni esemplari di alfabeti figurati del Cinquecento di area transalpina. Partendo dall’alfabeto dei bambini di Hans Weiditz (1521, costruito rispettando le più rigorose regole geometriche, codificate nei coevi trattati rinascimentali, ma anche riflesso del rinato gusto per i fregi all’antica con putti, si passa agli alfabeti di Peter Flötner (1534 e di Jost Amman (1567, dove le lettere sono integralmente costituite da corpi umani, forzati in complicate posture, talvolta persino licenziose. Questi esemplari rappresentano degli interessanti esperimenti calligrafici, dove l’uomo diviene concretamente l’unità di misura dei caratteri dell’alfabeto.

  4. PDM-Based Stamping CAPP System Embedded in UG%UG平台上基于PDM的冲压CAPP系统

    Institute of Scientific and Technical Information of China (English)

    曹传亮; 张祥林

    2011-01-01

    介绍了内嵌于UG平台上基于PDM的冲压CAPP系统,着重研究了工艺信息编辑管理模块、在UG制图环境下的工艺卡片的自动生成以及所使用的关键技术.该系统实现了与企业产品品质先期策划(APQP)系统的信息集成,提高了企业工艺信息管理水平,促进了企业信息一体化建设.%This paper introduces a PDM-based Stamping CAPP system embedded in UG.and makes a special effort to research on process information management,automatic production of the process card in UG drafting module and some key techniques. The integration with CAPP and Advanced Product Quality Planning (APQP) is realized,that can greatly improve the level of process information management,and promote the construction of information integration in the company.

  5. Hydrogeology and physical characteristics of water samples at the Red River aluminum site, Stamps, Arkansas, April 2001

    Science.gov (United States)

    Czarnecki, John B.; Stanton, Gregory P.; Freiwald, David A.

    2001-01-01

    The Red River Aluminum site near Stamps, Arkansas, contains waste piles of salt cake and metal byproducts from the smelting of aluminum. The waste piles are subjected to about 50 inches of rainfall a year, resulting in the dissolution of the salts and metal. To assess the potential threat to underlying ground-water resources at the site, its hydrogeology was characterized by measuring water levels and field parameters of water quality in 23 wells and at 2 surface-water sites. Seventeen of these monitor wells were constructed at various depths for this study to allow for the separate characterization of the shallow and deep ground-water systems, the calculation of vertical gradients, and the collection of water samples at different depths within the flow system. Lithologic descriptions from drill-hole cuttings and geophysical logs indicate the presence of interbedded sands, gravels, silts, and clays to depths of 65 feet. The regionally important Sparta aquifer underlies the site. Water levels in shallow wells indicate radial flow away from the salt-cake pile located near the center of the site. Flow in the deep system is to the west and southwest toward Bodcau Creek. Water-level data from eight piezometer nests indicate a downward hydraulic gradient from the shallow to deep systems across the site. Values of specific conductance (an indicator of dissolved salts) ranged from 215 to 196,200 microsiemens per centimeter and indicate that saline waters are being transported horizontally and vertically downward away from the site

  6. Constitutive relationships of hot stamping boron steel B1500HS based on the modified Arrhenius and Johnson–Cook model

    International Nuclear Information System (INIS)

    Constitutive relationship of boron steel is one of the most necessary mathematical models in the numerical simulation of hot stamping; it describes the relationship of the flow stress with strain, strain rate and temperature. In order to attain the constitutive relationship of boron steel B1500HS, four types of samples with microstructure of austenite, ferrite+pearlite, bainite or martensite are prepared by the Gleeble 1500D thermo-mechanical simulator. Isothermal uniaxial tension testings for these specimens are performed at 20–900 °C at the strain rates of 0.01 s–1, 0.1 s–1, 1.0 s–1 and 10 s–1 by Gleeble 1500D, and the true stress–strain curves at the relative conditions are gained. The experimental results show that, the flow stress of samples with relative microstructure rises with the decrease of the deformation temperature, and with the increase of the strain rate. The modified Arrhenius model is used to describe the hot deformation of samples with austenite microstructure, and the modified Johnson–Cook model is used to describe the deformation process of samples with ferrite+pearlite, bainite or martensite microstructure. The constitutive equations depending on the strain, strain rate and temperature are attained by the regression analysis for the experimental data of flow stress, strain, strain rate, temperature, etc. The comparison of the computational data and the experimental results shows that, the computational data using the constitutive relationships are well consistent with the experimental data

  7. Repeated Acquisitions and Extinctions in Classical Conditioning of the Rabbit Nictitating Membrane Response

    Science.gov (United States)

    Kehoe, E. James

    2006-01-01

    The rabbit nictitating membrane (NM) response underwent successive stages of acquisition and extinction training in both delay (Experiment 1) and trace (Experiment 2) classical conditioning. In both cases, successive acquisitions became progressively faster, although the largest, most reliable acceleration occurred between the first and second…

  8. Progressive die for copier gasket%复印机垫片级进模设计

    Institute of Scientific and Technical Information of China (English)

    王娟; 吴正策

    2012-01-01

    The stamping process of a copier gasket was analyzed and the general structure and layout design of a multi-position progressive die for the gasket were presented.%分析了复印机垫片的冲压成形工艺,介绍了垫片多工位级进模总体结构设计、排样方式.生产实践证明,该模具生产的零件符合尺寸精度要求.

  9. Progressive Business

    DEFF Research Database (Denmark)

    Christiansen, Christian O.

    2016-01-01

    Guest Post to the Society for U.S. Intellectual History Blog. Brief introduction to the book Progressive Business: An Intellectual History of the Role of Business in American Society, Oxford U.P., 2015.......Guest Post to the Society for U.S. Intellectual History Blog. Brief introduction to the book Progressive Business: An Intellectual History of the Role of Business in American Society, Oxford U.P., 2015....

  10. Experimental proposal for testing the Emergence of Environment Induced (EIN) Classical Selection rules with Biological Systems

    CERN Document Server

    Durt, Thomas

    2010-01-01

    According to the so-called Quantum Darwinist approach, the emergence of "classical islands" from a quantum background is assumed to obey a (selection) principle of maximal information. We illustrate this idea by considering the coupling of two oscillators (modes). As our approach suggests that the classical limit could have emerged throughout a long and progressive Evolution mechanism, it is likely that primitive living organisms behave in a "more quantum", "less classical" way than more evolved ones. This brings us to seriously consider the possibility to measure departures from classicality exhibited by biological systems. We describe an experimental proposal the aimed at revealing the presence of entanglement in the biophotonic radiation emitted by biological sources.

  11. Applying classical geometry intuition to quantum spin

    Science.gov (United States)

    Durfee, Dallin S.; Archibald, James L.

    2016-09-01

    Using concepts of geometric orthogonality and linear independence, we logically deduce the form of the Pauli spin matrices and the relationships between the three spatially orthogonal basis sets of the spin-1/2 system. Rather than a mathematically rigorous derivation, the relationships are found by forcing expectation values of the different basis states to have the properties we expect of a classical, geometric coordinate system. The process highlights the correspondence of quantum angular momentum with classical notions of geometric orthogonality, even for the inherently non-classical spin-1/2 system. In the process, differences in and connections between geometrical space and Hilbert space are illustrated.

  12. A Classical Introduction to Galois Theory

    CERN Document Server

    Newman, Stephen C

    2012-01-01

    This book provides an introduction to Galois theory and focuses on one central theme - the solvability of polynomials by radicals. Both classical and modern approaches to the subject are described in turn in order to have the former (which is relatively concrete and computational) provide motivation for the latter (which can be quite abstract). The theme of the book is historically the reason that Galois theory was created, and it continues to provide a platform for exploring both classical and modern concepts. This book examines a number of problems arising in the area of classical mathematic

  13. Tomograms in the quantum-classical transition

    Energy Technology Data Exchange (ETDEWEB)

    Man' ko, V.I. [P.N. Lebedev Physical Institute, Leninskii Prospect 53, Moscow 119991 (Russian Federation)]. E-mail: manko@na.infn.it; Marmo, G. [Dipartimento di Scienze Fisiche dell' Universita Federico II e Sezione INFN di Napoli, Complesso Universitario di Monte S. Angelo, I-80126 Naples (Italy)]. E-mail: marmo@na.infn.it; Simoni, A. [Dipartimento di Scienze Fisiche dell' Universita Federico II e Sezione INFN di Napoli, Complesso Universitario di Monte S. Angelo, I-80126 Naples (Italy)]. E-mail: simoni@na.infn.it; Stern, A. [Department of Physics, University of Alabama, Tuscaloosa, AL 35487 (United States)]. E-mail: astern@bama.ua.edu; Ventriglia, F. [Dipartimento di Scienze Fisiche dell' Universita Federico II e Sezione INFN di Napoli, Complesso Universitario di Monte S. Angelo, I-80126 Naples (Italy)]. E-mail: ventriglia@na.infn.it

    2005-08-08

    The quantum-classical limits for quantum tomograms are studied and compared with the corresponding classical tomograms, using two different definitions for the limit. One is the Planck limit where -bar ->0 in all -bar -dependent physical observables, and the other is the Ehrenfest limit where -bar ->0 while keeping constant the mean value of the energy. The Ehrenfest limit of eigenstate tomograms for a particle in a box and a harmonic oscillator is shown to agree with the corresponding classical tomograms of phase-space distributions, after a time averaging. The Planck limit of superposition state tomograms of the harmonic oscillator demonstrates the decreasing contribution of interference terms as -bar ->0.

  14. Tomograms in the quantum-classical transition

    International Nuclear Information System (INIS)

    The quantum-classical limits for quantum tomograms are studied and compared with the corresponding classical tomograms, using two different definitions for the limit. One is the Planck limit where -bar ->0 in all -bar -dependent physical observables, and the other is the Ehrenfest limit where -bar ->0 while keeping constant the mean value of the energy. The Ehrenfest limit of eigenstate tomograms for a particle in a box and a harmonic oscillator is shown to agree with the corresponding classical tomograms of phase-space distributions, after a time averaging. The Planck limit of superposition state tomograms of the harmonic oscillator demonstrates the decreasing contribution of interference terms as -bar ->0

  15. Failure of classical elasticity in auxetic foams

    Directory of Open Access Journals (Sweden)

    J. H. Roh

    2013-04-01

    Full Text Available Poisson's ratio, ν, was measured for four materials, a rubbery polymer, a conventional soft foam, and two auxetic foams. We find that for the first two materials, having ν ≥ 0.2, the experimental determinations of Poisson's ratio are in good agreement with values calculated from the shear and tensile moduli using the equations of classical elasticity. However, for the two auxetic materials (ν < 0, the equations of classical elasticity give values significantly different from the measured ν. We offer an interpretation of these results based on a recently published analysis of the bounds on Poisson's ratio for classical elasticity to be applicable.

  16. Classical thermodynamics of non-electrolyte solutions

    CERN Document Server

    Van Ness, H C

    1964-01-01

    Classical Thermodynamics of Non-Electrolyte Solutions covers the historical development of classical thermodynamics that concerns the properties of vapor and liquid solutions of non-electrolytes. Classical thermodynamics is a network of equations, developed through the formal logic of mathematics from a very few fundamental postulates and leading to a great variety of useful deductions. This book is composed of seven chapters and begins with discussions on the fundamentals of thermodynamics and the thermodynamic properties of fluids. The succeeding chapter presents the equations of state for

  17. Higher Dimensional Classical W-Algebras

    CERN Document Server

    Martínez-Moras, F; Martinez-Moras, Fernando; Ramos, Eduardo

    1993-01-01

    Classical $W$-algebras in higher dimensions are constructed. This is achieved by generalizing the classical Gel'fand-Dickey brackets to the commutative limit of the ring of classical pseudodifferential operators in arbitrary dimension. These $W$-algebras are the Poisson structures associated with a higher dimensional version of the Khokhlov-Zabolotskaya hierarchy (dispersionless KP-hierarchy). The two dimensional case is worked out explicitly and it is shown that the role of Diff$S(1)$ is taken by the algebra of generators of local diffeomorphisms in two dimensions.

  18. Classical Gravitational Interactions and Gravitational Lorentz Force

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    In quantum gauge theory of gravity, the gravitational field is represented by gravitational gauge field.The field strength of gravitational gauge field has both gravitoelectric component and gravitomagnetic component. In classical level, gauge theory of gravity gives classical Newtonian gravitational interactions in a relativistic form. Besides,it gives gravitational Lorentz force, which is the gravitational force on a moving object in gravitomagnetic field The direction of gravitational Lorentz force is not the same as that of classical gravitational Newtonian force. Effects of gravitational Lorentz force should be detectable, and these effects can be used to discriminate gravitomagnetic field from ordinary electromagnetic magnetic field.

  19. Classical Statistical Mechanics and Landau Damping

    OpenAIRE

    Buchmuller, W; Jakovac, A.

    1997-01-01

    We study the retarded response function in scalar $\\phi^4$-theory at finite temperature. We find that in the high-temperature limit the imaginary part of the self-energy is given by the classical theory to leading order in the coupling. In particular the plasmon damping rate is a purely classical effect to leading order, as shown by Aarts and Smit. The dominant contribution to Landau damping is given by the propagation of classical fields in a heat bath of non-interacting fields.

  20. Deduction of Lorentz Transformations from Classical Thermodynamics

    Directory of Open Access Journals (Sweden)

    Angela M. Ares de Parga

    2015-01-01

    Full Text Available The Lorentz transformations are obtained by assuming that the laws of classical thermodynamics are invariant under changes of inertial reference frames. As Maxwell equations are used in order to deduce a wave equation that shows the constancy of the speed of light, by means of the laws of classical thermodynamics, the invariance of the Carnot cycle is deduced under reference frame changes. Starting with this result and the blackbody particle number density in a rest frame, the Lorentz transformations are obtained. A discussion about the universality of classical thermodynamics is given.

  1. Hidden BRS invariance in classical mechanics

    International Nuclear Information System (INIS)

    We give in this paper a path integral formulation of classical mechanics. We do so by writing down the associated classical-generating functional. This functional exhibits an unexpected BRS-like and antiBRS-like invariance. This invariance allows for a simple expression, in term of superfields, of this generating functional. Associated to the BRS and antiBRS charges there is also a ghost charge whose conservation turns out to be nothing else than the well-known theorem of classical mechanics. (orig.)

  2. Classical-field theory of thermal radiation

    CERN Document Server

    Rashkovskiy, Sergey A

    2016-01-01

    In this paper, using the viewpoint that quantum mechanics can be constructed as a classical field theory without any quantization I build a fully classical theory of thermal radiation. Planck's law for the spectral energy density of thermal radiation and the Einstein A-coefficient for spontaneous emission are derived in the framework of classical field theory without using the concept of "photon". It is shown that the spectral energy density of thermal radiation is apparently not a universal function of frequency, as follows from the Planck's law, but depends weakly on the nature of atoms, while Planck's law is valid only as an approximation in the limit of weak excitation of atoms.

  3. Fluctuations of wavefunctions about their classical average

    Energy Technology Data Exchange (ETDEWEB)

    Benet, L [Centro Internacional de Ciencias, Ciudad Universitaria, Chamilpa, Cuernavaca (Mexico); Flores, J [Centro Internacional de Ciencias, Ciudad Universitaria, Chamilpa, Cuernavaca (Mexico); Hernandez-Saldana, H [Centro Internacional de Ciencias, Ciudad Universitaria, Chamilpa, Cuernavaca (Mexico); Izrailev, F M [Centro Internacional de Ciencias, Ciudad Universitaria, Chamilpa, Cuernavaca (Mexico); Leyvraz, F [Centro Internacional de Ciencias, Ciudad Universitaria, Chamilpa, Cuernavaca (Mexico); Seligman, T H [Centro Internacional de Ciencias, Ciudad Universitaria, Chamilpa, Cuernavaca (Mexico)

    2003-02-07

    Quantum-classical correspondence for the average shape of eigenfunctions and the local spectral density of states are well-known facts. In this paper, the fluctuations of the quantum wavefunctions around the classical value are discussed. A simple random matrix model leads to a Gaussian distribution of the amplitudes whose width is determined by the classical shape of the eigenfunction. To compare this prediction with numerical calculations in chaotic models of coupled quartic oscillators, we develop a rescaling method for the components. The expectations are broadly confirmed, but deviations due to scars are observed. This effect is much reduced when both Hamiltonians have chaotic dynamics.

  4. Fluctuations of wavefunctions about their classical average

    CERN Document Server

    Bénet, L; Hernandez-Saldana, H; Izrailev, F M; Leyvraz, F; Seligman, T H

    2003-01-01

    Quantum-classical correspondence for the average shape of eigenfunctions and the local spectral density of states are well-known facts. In this paper, the fluctuations of the quantum wavefunctions around the classical value are discussed. A simple random matrix model leads to a Gaussian distribution of the amplitudes whose width is determined by the classical shape of the eigenfunction. To compare this prediction with numerical calculations in chaotic models of coupled quartic oscillators, we develop a rescaling method for the components. The expectations are broadly confirmed, but deviations due to scars are observed. This effect is much reduced when both Hamiltonians have chaotic dynamics.

  5. Bohmian measures and their classical limit

    KAUST Repository

    Markowich, Peter

    2010-09-01

    We consider a class of phase space measures, which naturally arise in the Bohmian interpretation of quantum mechanics. We study the classical limit of these so-called Bohmian measures, in dependence on the scale of oscillations and concentrations of the sequence of wave functions under consideration. The obtained results are consequently compared to those derived via semi-classical Wigner measures. To this end, we shall also give a connection to the theory of Young measures and prove several new results on Wigner measures themselves. Our analysis gives new insight on oscillation and concentration effects in the semi-classical regime. © 2010 Elsevier Inc.

  6. Microstructure prediction of high strength steel square-cup part in hot stamping%高强钢盒形件热冲压成形组织预测

    Institute of Scientific and Technical Information of China (English)

    雷呈喜; 崔俊佳; 邢忠文; 古田; 赵浩

    2012-01-01

    根据热冲压成形的工艺特点,分析热冲压成形过程中的组织转变过程,并选择了热冲压成形的组织转变模型.利用ABAQUS后处理二次开发,预测高强钢热冲压盒形件中马氏体的体积分数.通过热冲压试验和数值模拟,研究了压边力对热冲压盒形件微观组织的影响规律,并由热冲压盒形件的金相分析进行验证,试验结果与模拟结果基本吻合,证明所选模型对预测热冲压成形件的组织可行,而且有效.%According to the characteristic of hot-stamping process, the process of microstructure transformation was analyzed, and then the model of microstructure transformation in the hot-stamping process was chosen. The volume fraction of martensite was predicted in AHSS hot-stamping process by the secondary development of ABAQUS post-process. Besides, the effect of Blank Holder Force (BHF) on the microstructure of hot-stamping square-cup part was studied through the hot-stamping experiments and numerical simulation. Then the metallographic analysis of hot-stamping parts was carried out to verify the results of the nu-merical simulation. The results of experiments and numerical simulation agreed well, which indicated that using the model to pre-dict microstructures of hot-stamping parts was feasible and effective.

  7. Classical enhancement of quantum vacuum fluctuations

    CERN Document Server

    De Lorenci, V A

    2016-01-01

    We propose a mechanism for the enhancement of vacuum fluctuations by means of a classical field. The basic idea is that if an observable quantity depends quadratically upon a quantum field, such as the electric field, then the application of a classical field produces a cross term between the classical and quantum fields. This cross term may be significantly larger than the purely quantum part, but also undergoes fluctuations driven by the quantum field. We illustrate this effect in a model for lightcone fluctuations involving pulses in a nonlinear dielectric. Vacuum electric field fluctuations produce fluctuations in the speed of a probe pulse, and form an analog model for quantum gravity effects. If the material has a nonzero third-order susceptibility, then the fractional light speed fluctuations are proportional to the square of the fluctuating electric field. Hence the application of a classical electric field can enhance the speed fluctuations. We give an example where this enhancement can be an increas...

  8. Classical geometry from the quantum Liouville theory

    CERN Document Server

    Hadasz, L; Piatek, M; Hadasz, Leszek; Jaskolski, Zbigniew; Piatek, Marcin

    2005-01-01

    Zamolodchikov's recursion relations are used to analyze the existence and approximations to the classical conformal block in the case of four parabolic weights. Strong numerical evidence is found that the saddle point momenta arising in the classical limit of the DOZZ quantum Liouville theory are simply related to the geodesic length functions of the hyperbolic geometry on the 4-punctured Riemann sphere. Such relation provides new powerful methods for both numerical and analytical calculations of these functions. The consistency conditions for the factorization of the 4-point classical Liouville action in different channels are numerically verified. The factorization yields efficient numerical methods to calculate the 4-point classical action and, by the Polyakov conjecture, the accessory parameters of the Fuchsian uniformization of the 4-punctured sphere.

  9. Classical geometry from the quantum Liouville theory

    Energy Technology Data Exchange (ETDEWEB)

    Hadasz, Leszek [M. Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Cracow (Poland)]. E-mail: hadasz@th.if.uj.edu.pl; Jaskolski, Zbigniew [Institute of Theoretical Physics, University of WrocIaw, pl. M. Borna, 950-204 WrocIaw (Poland)]. E-mail: jask@ift.uni.wroc.pl; Piatek, Marcin [Institute of Theoretical Physics, University of WrocIaw, pl. M. Borna, 950-204 WrocIaw (Poland)]. E-mail: piatek@ift.uni.wroc.pl

    2005-09-26

    Zamolodchikov's recursion relations are used to analyze the existence and approximations to the classical conformal block in the case of four parabolic weights. Strong numerical evidence is found that the saddle point momenta arising in the classical limit of the DOZZ quantum Liouville theory are simply related to the geodesic length functions of the hyperbolic geometry on the 4-punctured Riemann sphere. Such relation provides new powerful methods for both numerical and analytical calculations of these functions. The consistency conditions for the factorization of the 4-point classical Liouville action in different channels are numerically verified. The factorization yields efficient numerical methods to calculate the 4-point classical action and, by the Polyakov conjecture, the accessory parameters of the Fuchsian uniformization of the 4-punctured sphere.

  10. Equilibration properties of classical integrable field theories

    Science.gov (United States)

    De Luca, Andrea; Mussardo, Giuseppe

    2016-06-01

    We study the equilibration properties of classical integrable field theories at a finite energy density, with a time evolution that starts from initial conditions far from equilibrium. These classical field theories may be regarded as quantum field theories in the regime of high occupation numbers. This observation permits to recover the classical quantities from the quantum ones by taking a proper \\hslash \\to 0 limit. In particular, the time averages of the classical theories can be expressed in terms of a suitable version of the LeClair-Mussardo formula relative to the generalized Gibbs ensemble. For the purposes of handling time averages, our approach provides a solution of the problem of the infinite gap solutions of the inverse scattering method.

  11. Classical algebra its nature, origins, and uses

    CERN Document Server

    Cooke, Roger L

    2008-01-01

    This insightful book combines the history, pedagogy, and popularization of algebra to present a unified discussion of the subject. Classical Algebra provides a complete and contemporary perspective on classical polynomial algebra through the exploration of how it was developed and how it exists today. With a focus on prominent areas such as the numerical solutions of equations, the systematic study of equations, and Galois theory, this book facilitates a thorough understanding of algebra and illustrates how the concepts of modern algebra originally developed from classical algebraic precursors. This book successfully ties together the disconnect between classical and modern algebraand provides readers with answers to many fascinating questions that typically go unexamined, including: What is algebra about? How did it arise? What uses does it have? How did it develop? What problems and issues have occurred in its history? How were these problems and issues resolved? The author answers these questions and more,...

  12. Classics in the Classroom: Great Expectations Fulfilled.

    Science.gov (United States)

    Pearl, Shela

    1986-01-01

    Describes how an English teacher in a Queens, New York, ghetto school introduced her grade nine students to Charles Dickens's "Great Expectations." Focuses on students' responses, which eventually became enthusiastic, and discusses the use of classics within the curriculum. (KH)

  13. Ambiguities in Quantizing a Classical System

    CERN Document Server

    Redmount, I H; Young, K; Redmount, Ian; Suen, Wai-Mo; Young, Kenneth

    1999-01-01

    One classical theory, as determined by an equation of motion or set of classical trajectories, can correspond to many unitarily {\\em in}equivalent quantum theories upon canonical quantization. This arises from a remarkable ambiguity, not previously investigated, in the construction of the classical (and hence the quantized) Hamiltonian or Lagrangian. This ambiguity is illustrated for systems with one degree of freedom: An arbitrary function of the constants of motion can be introduced into this construction. For example, the nonrelativistic and relativistic free particles follow identical classical trajectories, but the Hamiltonians or Lagrangians, and the canonically quantized versions of these descriptions, are inequivalent. Inequivalent descriptions of other systems, such as the harmonic oscillator, are also readily obtained.

  14. Secure quantum communication using classical correlated channel

    Science.gov (United States)

    Costa, D.; de Almeida, N. G.; Villas-Boas, C. J.

    2016-10-01

    We propose a secure protocol to send quantum information from one part to another without a quantum channel. In our protocol, which resembles quantum teleportation, a sender (Alice) and a receiver (Bob) share classical correlated states instead of EPR ones, with Alice performing measurements in two different bases and then communicating her results to Bob through a classical channel. Our secure quantum communication protocol requires the same amount of classical bits as the standard quantum teleportation protocol. In our scheme, as in the usual quantum teleportation protocol, once the classical channel is established in a secure way, a spy (Eve) will never be able to recover the information of the unknown quantum state, even if she is aware of Alice's measurement results. Security, advantages, and limitations of our protocol are discussed and compared with the standard quantum teleportation protocol.

  15. A Bayes but Not Classically Sufficient Statistic

    OpenAIRE

    Blackwell, D.; Ramamoorthi, R. V.

    1982-01-01

    In a Borel setting, every classically sufficient statistic is Bayes sufficient, but not vice versa. The example is a hypothesis testing problem in which Bayesians, but not classicists, can achieve zero error probabilities.

  16. The new-classical contribution to macroeconomics

    Directory of Open Access Journals (Sweden)

    D. LAIDLER

    2013-12-01

    Full Text Available This work is devoted to assessing New-Classical ideas, and to asking what of lasting importance this school of macroeconomics has contributed since the early 1970s. It deals in turn with the relationship between New-Classical Economics and Monetarism, the relative explanatory power of these two bodies of doctrine over empirical evidence, and the claims of New-Classical Economics to embody a superior analytic method. The author argues that, although the particular ways in which New-Classical Macroeconomics has applied its basic ideas are unnecessarily restrictive, its stress on equilibrium behaviour conditioned by the state of individual agents’ expectations as a basis for macro modelling is nevertheless valuable.  

  17. Secure quantum communication using classical correlated channel

    Science.gov (United States)

    Costa, D.; de Almeida, N. G.; Villas-Boas, C. J.

    2016-07-01

    We propose a secure protocol to send quantum information from one part to another without a quantum channel. In our protocol, which resembles quantum teleportation, a sender (Alice) and a receiver (Bob) share classical correlated states instead of EPR ones, with Alice performing measurements in two different bases and then communicating her results to Bob through a classical channel. Our secure quantum communication protocol requires the same amount of classical bits as the standard quantum teleportation protocol. In our scheme, as in the usual quantum teleportation protocol, once the classical channel is established in a secure way, a spy (Eve) will never be able to recover the information of the unknown quantum state, even if she is aware of Alice's measurement results. Security, advantages, and limitations of our protocol are discussed and compared with the standard quantum teleportation protocol.

  18. Multi-Time Equations, Classical and Quantum

    CERN Document Server

    Petrat, Sören

    2013-01-01

    Multi-time equations are evolution equations involving several time variables, one for each particle. Such equations have been considered for the purpose of making theories manifestly Lorentz invariant. We compare their status and significance in classical and quantum physics.

  19. Rough sets: the classical and extended views

    Institute of Scientific and Technical Information of China (English)

    ZIARKO Wojciech

    2008-01-01

    The article is a comprehensive review of two major approaches to rough set theory: the classic rough setmodel introduced by Pawlak and the probabilistic approaches. The classic model is presented as a staging ground to the discussion of two varieties of the probabilistic approach, i.e. of the variable precision and Bayesian rough set models. Both of these models extend the classic model to deal with stochastic interactions while preserving the basicideas of the original rough set theory, such as set approximations, data dependencies, reducts etc. The probabilistic models are able to handle weaker data interactions than the classic model, thus extending the applicability of the rough set paradigm. The extended models are presented in considerable detail with some illustrative examples.

  20. The many classical faces of quantum structures

    OpenAIRE

    Heunen, Chris

    2014-01-01

    Interpretational problems with quantum mechanics can be phrased precisely by only talking about empirically accessible information. This prompts a mathematical reformulation of quantum mechanics in terms of classical mechanics. We survey this programme in terms of algebraic quantum theory.